Commit | Line | Data |
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f5166768 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/super.c |
ac27a0ec DK |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Laboratoire MASI - Institut Blaise Pascal | |
8 | * Universite Pierre et Marie Curie (Paris VI) | |
9 | * | |
10 | * from | |
11 | * | |
12 | * linux/fs/minix/inode.c | |
13 | * | |
14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
15 | * | |
16 | * Big-endian to little-endian byte-swapping/bitmaps by | |
17 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/time.h> | |
c5ca7c76 | 24 | #include <linux/vmalloc.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
66114cad | 28 | #include <linux/backing-dev.h> |
ac27a0ec | 29 | #include <linux/parser.h> |
ac27a0ec | 30 | #include <linux/buffer_head.h> |
a5694255 | 31 | #include <linux/exportfs.h> |
ac27a0ec DK |
32 | #include <linux/vfs.h> |
33 | #include <linux/random.h> | |
34 | #include <linux/mount.h> | |
35 | #include <linux/namei.h> | |
36 | #include <linux/quotaops.h> | |
37 | #include <linux/seq_file.h> | |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
ef510424 | 41 | #include <linux/dax.h> |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
ee73f9a5 | 43 | #include <linux/iversion.h> |
c83ad55e | 44 | #include <linux/unicode.h> |
c6a564ff | 45 | #include <linux/part_stat.h> |
bfff6873 LC |
46 | #include <linux/kthread.h> |
47 | #include <linux/freezer.h> | |
9a089b21 | 48 | #include <linux/fsnotify.h> |
e5a185c2 LC |
49 | #include <linux/fs_context.h> |
50 | #include <linux/fs_parser.h> | |
bfff6873 | 51 | |
3dcf5451 | 52 | #include "ext4.h" |
4a092d73 | 53 | #include "ext4_extents.h" /* Needed for trace points definition */ |
3dcf5451 | 54 | #include "ext4_jbd2.h" |
ac27a0ec DK |
55 | #include "xattr.h" |
56 | #include "acl.h" | |
3661d286 | 57 | #include "mballoc.h" |
0c9ec4be | 58 | #include "fsmap.h" |
ac27a0ec | 59 | |
9bffad1e TT |
60 | #define CREATE_TRACE_POINTS |
61 | #include <trace/events/ext4.h> | |
62 | ||
0b75a840 | 63 | static struct ext4_lazy_init *ext4_li_info; |
59ebc7fd | 64 | static DEFINE_MUTEX(ext4_li_mtx); |
e294a537 | 65 | static struct ratelimit_state ext4_mount_msg_ratelimit; |
9f6200bb | 66 | |
617ba13b | 67 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 68 | unsigned long journal_devnum); |
2adf6da8 | 69 | static int ext4_show_options(struct seq_file *seq, struct dentry *root); |
2d01ddc8 | 70 | static void ext4_update_super(struct super_block *sb); |
4392fbc4 | 71 | static int ext4_commit_super(struct super_block *sb); |
11215630 | 72 | static int ext4_mark_recovery_complete(struct super_block *sb, |
2b2d6d01 | 73 | struct ext4_super_block *es); |
11215630 JK |
74 | static int ext4_clear_journal_err(struct super_block *sb, |
75 | struct ext4_super_block *es); | |
617ba13b | 76 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 77 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); |
c4be0c1d | 78 | static int ext4_unfreeze(struct super_block *sb); |
c4be0c1d | 79 | static int ext4_freeze(struct super_block *sb); |
2035e776 TT |
80 | static inline int ext2_feature_set_ok(struct super_block *sb); |
81 | static inline int ext3_feature_set_ok(struct super_block *sb); | |
bfff6873 LC |
82 | static void ext4_destroy_lazyinit_thread(void); |
83 | static void ext4_unregister_li_request(struct super_block *sb); | |
8f1f7453 | 84 | static void ext4_clear_request_list(void); |
c6cb7e77 EW |
85 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
86 | unsigned int journal_inum); | |
da812f61 | 87 | static int ext4_validate_options(struct fs_context *fc); |
b6bd2435 LC |
88 | static int ext4_check_opt_consistency(struct fs_context *fc, |
89 | struct super_block *sb); | |
85456054 | 90 | static void ext4_apply_options(struct fs_context *fc, struct super_block *sb); |
02f960f8 | 91 | static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); |
cebe85d5 LC |
92 | static int ext4_get_tree(struct fs_context *fc); |
93 | static int ext4_reconfigure(struct fs_context *fc); | |
94 | static void ext4_fc_free(struct fs_context *fc); | |
95 | static int ext4_init_fs_context(struct fs_context *fc); | |
96 | static const struct fs_parameter_spec ext4_param_specs[]; | |
ac27a0ec | 97 | |
e74031fd JK |
98 | /* |
99 | * Lock ordering | |
100 | * | |
e74031fd | 101 | * page fault path: |
d4f5258e JK |
102 | * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start |
103 | * -> page lock -> i_data_sem (rw) | |
e74031fd JK |
104 | * |
105 | * buffered write path: | |
c1e8d7c6 | 106 | * sb_start_write -> i_mutex -> mmap_lock |
e74031fd JK |
107 | * sb_start_write -> i_mutex -> transaction start -> page lock -> |
108 | * i_data_sem (rw) | |
109 | * | |
110 | * truncate: | |
d4f5258e JK |
111 | * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> |
112 | * page lock | |
113 | * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> | |
1d39834f | 114 | * i_data_sem (rw) |
e74031fd JK |
115 | * |
116 | * direct IO: | |
c1e8d7c6 | 117 | * sb_start_write -> i_mutex -> mmap_lock |
1d39834f | 118 | * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) |
e74031fd JK |
119 | * |
120 | * writepages: | |
121 | * transaction start -> page lock(s) -> i_data_sem (rw) | |
122 | */ | |
123 | ||
02f960f8 LC |
124 | static const struct fs_context_operations ext4_context_ops = { |
125 | .parse_param = ext4_parse_param, | |
cebe85d5 LC |
126 | .get_tree = ext4_get_tree, |
127 | .reconfigure = ext4_reconfigure, | |
128 | .free = ext4_fc_free, | |
02f960f8 LC |
129 | }; |
130 | ||
131 | ||
c290ea01 | 132 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
2035e776 | 133 | static struct file_system_type ext2_fs_type = { |
cebe85d5 LC |
134 | .owner = THIS_MODULE, |
135 | .name = "ext2", | |
136 | .init_fs_context = ext4_init_fs_context, | |
137 | .parameters = ext4_param_specs, | |
138 | .kill_sb = kill_block_super, | |
139 | .fs_flags = FS_REQUIRES_DEV, | |
2035e776 | 140 | }; |
7f78e035 | 141 | MODULE_ALIAS_FS("ext2"); |
fa7614dd | 142 | MODULE_ALIAS("ext2"); |
2035e776 TT |
143 | #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) |
144 | #else | |
145 | #define IS_EXT2_SB(sb) (0) | |
146 | #endif | |
147 | ||
148 | ||
ba69f9ab | 149 | static struct file_system_type ext3_fs_type = { |
cebe85d5 LC |
150 | .owner = THIS_MODULE, |
151 | .name = "ext3", | |
152 | .init_fs_context = ext4_init_fs_context, | |
153 | .parameters = ext4_param_specs, | |
154 | .kill_sb = kill_block_super, | |
155 | .fs_flags = FS_REQUIRES_DEV, | |
ba69f9ab | 156 | }; |
7f78e035 | 157 | MODULE_ALIAS_FS("ext3"); |
fa7614dd | 158 | MODULE_ALIAS("ext3"); |
ba69f9ab | 159 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) |
bd81d8ee | 160 | |
fa491b14 | 161 | |
67c0f556 | 162 | static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, |
fa491b14 | 163 | bh_end_io_t *end_io) |
164 | { | |
165 | /* | |
166 | * buffer's verified bit is no longer valid after reading from | |
167 | * disk again due to write out error, clear it to make sure we | |
168 | * recheck the buffer contents. | |
169 | */ | |
170 | clear_buffer_verified(bh); | |
171 | ||
172 | bh->b_end_io = end_io ? end_io : end_buffer_read_sync; | |
173 | get_bh(bh); | |
1420c4a5 | 174 | submit_bh(REQ_OP_READ | op_flags, bh); |
fa491b14 | 175 | } |
176 | ||
67c0f556 | 177 | void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, |
fa491b14 | 178 | bh_end_io_t *end_io) |
179 | { | |
180 | BUG_ON(!buffer_locked(bh)); | |
181 | ||
182 | if (ext4_buffer_uptodate(bh)) { | |
183 | unlock_buffer(bh); | |
184 | return; | |
185 | } | |
186 | __ext4_read_bh(bh, op_flags, end_io); | |
187 | } | |
188 | ||
67c0f556 | 189 | int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) |
fa491b14 | 190 | { |
191 | BUG_ON(!buffer_locked(bh)); | |
192 | ||
193 | if (ext4_buffer_uptodate(bh)) { | |
194 | unlock_buffer(bh); | |
195 | return 0; | |
196 | } | |
197 | ||
198 | __ext4_read_bh(bh, op_flags, end_io); | |
199 | ||
200 | wait_on_buffer(bh); | |
201 | if (buffer_uptodate(bh)) | |
202 | return 0; | |
203 | return -EIO; | |
204 | } | |
205 | ||
67c0f556 | 206 | int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) |
fa491b14 | 207 | { |
0b73284c ZY |
208 | lock_buffer(bh); |
209 | if (!wait) { | |
fa491b14 | 210 | ext4_read_bh_nowait(bh, op_flags, NULL); |
211 | return 0; | |
212 | } | |
0b73284c | 213 | return ext4_read_bh(bh, op_flags, NULL); |
fa491b14 | 214 | } |
215 | ||
fb265c9c | 216 | /* |
8394a6ab | 217 | * This works like __bread_gfp() except it uses ERR_PTR for error |
fb265c9c TT |
218 | * returns. Currently with sb_bread it's impossible to distinguish |
219 | * between ENOMEM and EIO situations (since both result in a NULL | |
220 | * return. | |
221 | */ | |
8394a6ab | 222 | static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, |
67c0f556 BVA |
223 | sector_t block, |
224 | blk_opf_t op_flags, gfp_t gfp) | |
fb265c9c | 225 | { |
2d069c08 | 226 | struct buffer_head *bh; |
227 | int ret; | |
fb265c9c | 228 | |
8394a6ab | 229 | bh = sb_getblk_gfp(sb, block, gfp); |
fb265c9c TT |
230 | if (bh == NULL) |
231 | return ERR_PTR(-ENOMEM); | |
cf2834a5 | 232 | if (ext4_buffer_uptodate(bh)) |
fb265c9c | 233 | return bh; |
2d069c08 | 234 | |
235 | ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); | |
236 | if (ret) { | |
237 | put_bh(bh); | |
238 | return ERR_PTR(ret); | |
239 | } | |
240 | return bh; | |
fb265c9c TT |
241 | } |
242 | ||
8394a6ab | 243 | struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, |
67c0f556 | 244 | blk_opf_t op_flags) |
8394a6ab | 245 | { |
246 | return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); | |
247 | } | |
248 | ||
249 | struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, | |
250 | sector_t block) | |
251 | { | |
252 | return __ext4_sb_bread_gfp(sb, block, 0, 0); | |
253 | } | |
254 | ||
5df1d412 | 255 | void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) |
256 | { | |
257 | struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); | |
258 | ||
259 | if (likely(bh)) { | |
0b73284c ZY |
260 | if (trylock_buffer(bh)) |
261 | ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL); | |
5df1d412 | 262 | brelse(bh); |
263 | } | |
fb265c9c TT |
264 | } |
265 | ||
d25425f8 DW |
266 | static int ext4_verify_csum_type(struct super_block *sb, |
267 | struct ext4_super_block *es) | |
268 | { | |
e2b911c5 | 269 | if (!ext4_has_feature_metadata_csum(sb)) |
d25425f8 DW |
270 | return 1; |
271 | ||
272 | return es->s_checksum_type == EXT4_CRC32C_CHKSUM; | |
273 | } | |
274 | ||
bbc605cd LC |
275 | __le32 ext4_superblock_csum(struct super_block *sb, |
276 | struct ext4_super_block *es) | |
a9c47317 DW |
277 | { |
278 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
279 | int offset = offsetof(struct ext4_super_block, s_checksum); | |
280 | __u32 csum; | |
281 | ||
282 | csum = ext4_chksum(sbi, ~0, (char *)es, offset); | |
283 | ||
284 | return cpu_to_le32(csum); | |
285 | } | |
286 | ||
c197855e SH |
287 | static int ext4_superblock_csum_verify(struct super_block *sb, |
288 | struct ext4_super_block *es) | |
a9c47317 | 289 | { |
9aa5d32b | 290 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
291 | return 1; |
292 | ||
293 | return es->s_checksum == ext4_superblock_csum(sb, es); | |
294 | } | |
295 | ||
06db49e6 | 296 | void ext4_superblock_csum_set(struct super_block *sb) |
a9c47317 | 297 | { |
06db49e6 TT |
298 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
299 | ||
9aa5d32b | 300 | if (!ext4_has_metadata_csum(sb)) |
a9c47317 DW |
301 | return; |
302 | ||
303 | es->s_checksum = ext4_superblock_csum(sb, es); | |
304 | } | |
305 | ||
8fadc143 AR |
306 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
307 | struct ext4_group_desc *bg) | |
bd81d8ee | 308 | { |
3a14589c | 309 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 310 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 311 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
312 | } |
313 | ||
8fadc143 AR |
314 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
315 | struct ext4_group_desc *bg) | |
bd81d8ee | 316 | { |
5272f837 | 317 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 318 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 319 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
320 | } |
321 | ||
8fadc143 AR |
322 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
323 | struct ext4_group_desc *bg) | |
bd81d8ee | 324 | { |
5272f837 | 325 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 326 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 327 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
328 | } |
329 | ||
021b65bb TT |
330 | __u32 ext4_free_group_clusters(struct super_block *sb, |
331 | struct ext4_group_desc *bg) | |
560671a0 AK |
332 | { |
333 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
334 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 335 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
336 | } |
337 | ||
338 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
339 | struct ext4_group_desc *bg) | |
340 | { | |
341 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
342 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 343 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
344 | } |
345 | ||
346 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
347 | struct ext4_group_desc *bg) | |
348 | { | |
349 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
350 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 351 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
352 | } |
353 | ||
354 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
355 | struct ext4_group_desc *bg) | |
356 | { | |
357 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
358 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 359 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
360 | } |
361 | ||
8fadc143 AR |
362 | void ext4_block_bitmap_set(struct super_block *sb, |
363 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 364 | { |
3a14589c | 365 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
366 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
367 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
368 | } |
369 | ||
8fadc143 AR |
370 | void ext4_inode_bitmap_set(struct super_block *sb, |
371 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 372 | { |
5272f837 | 373 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
374 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
375 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
376 | } |
377 | ||
8fadc143 AR |
378 | void ext4_inode_table_set(struct super_block *sb, |
379 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 380 | { |
5272f837 | 381 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
382 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
383 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
384 | } |
385 | ||
021b65bb TT |
386 | void ext4_free_group_clusters_set(struct super_block *sb, |
387 | struct ext4_group_desc *bg, __u32 count) | |
560671a0 AK |
388 | { |
389 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
390 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
391 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
392 | } | |
393 | ||
394 | void ext4_free_inodes_set(struct super_block *sb, | |
395 | struct ext4_group_desc *bg, __u32 count) | |
396 | { | |
397 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
398 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
399 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
400 | } | |
401 | ||
402 | void ext4_used_dirs_set(struct super_block *sb, | |
403 | struct ext4_group_desc *bg, __u32 count) | |
404 | { | |
405 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
406 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
407 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
408 | } | |
409 | ||
410 | void ext4_itable_unused_set(struct super_block *sb, | |
411 | struct ext4_group_desc *bg, __u32 count) | |
412 | { | |
413 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
414 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
415 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
416 | } | |
417 | ||
c92dc856 | 418 | static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) |
6a0678a7 | 419 | { |
6a0678a7 AB |
420 | now = clamp_val(now, 0, (1ull << 40) - 1); |
421 | ||
422 | *lo = cpu_to_le32(lower_32_bits(now)); | |
423 | *hi = upper_32_bits(now); | |
424 | } | |
425 | ||
426 | static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) | |
427 | { | |
428 | return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); | |
429 | } | |
430 | #define ext4_update_tstamp(es, tstamp) \ | |
c92dc856 JK |
431 | __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ |
432 | ktime_get_real_seconds()) | |
6a0678a7 AB |
433 | #define ext4_get_tstamp(es, tstamp) \ |
434 | __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) | |
d3d1faf6 | 435 | |
bdfe0cbd TT |
436 | /* |
437 | * The del_gendisk() function uninitializes the disk-specific data | |
438 | * structures, including the bdi structure, without telling anyone | |
439 | * else. Once this happens, any attempt to call mark_buffer_dirty() | |
440 | * (for example, by ext4_commit_super), will cause a kernel OOPS. | |
441 | * This is a kludge to prevent these oops until we can put in a proper | |
442 | * hook in del_gendisk() to inform the VFS and file system layers. | |
443 | */ | |
444 | static int block_device_ejected(struct super_block *sb) | |
445 | { | |
446 | struct inode *bd_inode = sb->s_bdev->bd_inode; | |
447 | struct backing_dev_info *bdi = inode_to_bdi(bd_inode); | |
448 | ||
449 | return bdi->dev == NULL; | |
450 | } | |
451 | ||
18aadd47 BJ |
452 | static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) |
453 | { | |
454 | struct super_block *sb = journal->j_private; | |
455 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
456 | int error = is_journal_aborted(journal); | |
5d3ee208 | 457 | struct ext4_journal_cb_entry *jce; |
18aadd47 | 458 | |
5d3ee208 | 459 | BUG_ON(txn->t_state == T_FINISHED); |
a0154344 DJ |
460 | |
461 | ext4_process_freed_data(sb, txn->t_tid); | |
462 | ||
18aadd47 | 463 | spin_lock(&sbi->s_md_lock); |
5d3ee208 DM |
464 | while (!list_empty(&txn->t_private_list)) { |
465 | jce = list_entry(txn->t_private_list.next, | |
466 | struct ext4_journal_cb_entry, jce_list); | |
18aadd47 BJ |
467 | list_del_init(&jce->jce_list); |
468 | spin_unlock(&sbi->s_md_lock); | |
469 | jce->jce_func(sb, jce, error); | |
470 | spin_lock(&sbi->s_md_lock); | |
471 | } | |
472 | spin_unlock(&sbi->s_md_lock); | |
473 | } | |
1c13d5c0 | 474 | |
afb585a9 MFO |
475 | /* |
476 | * This writepage callback for write_cache_pages() | |
477 | * takes care of a few cases after page cleaning. | |
478 | * | |
479 | * write_cache_pages() already checks for dirty pages | |
480 | * and calls clear_page_dirty_for_io(), which we want, | |
481 | * to write protect the pages. | |
482 | * | |
483 | * However, we may have to redirty a page (see below.) | |
484 | */ | |
d585bdbe | 485 | static int ext4_journalled_writepage_callback(struct folio *folio, |
afb585a9 MFO |
486 | struct writeback_control *wbc, |
487 | void *data) | |
488 | { | |
489 | transaction_t *transaction = (transaction_t *) data; | |
490 | struct buffer_head *bh, *head; | |
491 | struct journal_head *jh; | |
492 | ||
d585bdbe | 493 | bh = head = folio_buffers(folio); |
afb585a9 MFO |
494 | do { |
495 | /* | |
496 | * We have to redirty a page in these cases: | |
497 | * 1) If buffer is dirty, it means the page was dirty because it | |
498 | * contains a buffer that needs checkpointing. So the dirty bit | |
499 | * needs to be preserved so that checkpointing writes the buffer | |
500 | * properly. | |
501 | * 2) If buffer is not part of the committing transaction | |
502 | * (we may have just accidentally come across this buffer because | |
503 | * inode range tracking is not exact) or if the currently running | |
504 | * transaction already contains this buffer as well, dirty bit | |
505 | * needs to be preserved so that the buffer gets writeprotected | |
506 | * properly on running transaction's commit. | |
507 | */ | |
508 | jh = bh2jh(bh); | |
509 | if (buffer_dirty(bh) || | |
510 | (jh && (jh->b_transaction != transaction || | |
511 | jh->b_next_transaction))) { | |
d585bdbe | 512 | folio_redirty_for_writepage(wbc, folio); |
afb585a9 MFO |
513 | goto out; |
514 | } | |
515 | } while ((bh = bh->b_this_page) != head); | |
516 | ||
517 | out: | |
518 | return AOP_WRITEPAGE_ACTIVATE; | |
519 | } | |
520 | ||
521 | static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) | |
522 | { | |
523 | struct address_space *mapping = jinode->i_vfs_inode->i_mapping; | |
524 | struct writeback_control wbc = { | |
525 | .sync_mode = WB_SYNC_ALL, | |
526 | .nr_to_write = LONG_MAX, | |
527 | .range_start = jinode->i_dirty_start, | |
528 | .range_end = jinode->i_dirty_end, | |
529 | }; | |
530 | ||
531 | return write_cache_pages(mapping, &wbc, | |
532 | ext4_journalled_writepage_callback, | |
533 | jinode->i_transaction); | |
534 | } | |
535 | ||
536 | static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | if (ext4_should_journal_data(jinode->i_vfs_inode)) | |
541 | ret = ext4_journalled_submit_inode_data_buffers(jinode); | |
542 | else | |
59205c8d | 543 | ret = ext4_normal_submit_inode_data_buffers(jinode); |
afb585a9 MFO |
544 | return ret; |
545 | } | |
546 | ||
547 | static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) | |
548 | { | |
549 | int ret = 0; | |
550 | ||
551 | if (!ext4_should_journal_data(jinode->i_vfs_inode)) | |
552 | ret = jbd2_journal_finish_inode_data_buffers(jinode); | |
553 | ||
554 | return ret; | |
555 | } | |
556 | ||
1dc1097f JK |
557 | static bool system_going_down(void) |
558 | { | |
559 | return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF | |
560 | || system_state == SYSTEM_RESTART; | |
561 | } | |
562 | ||
02a7780e JK |
563 | struct ext4_err_translation { |
564 | int code; | |
565 | int errno; | |
566 | }; | |
567 | ||
568 | #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } | |
569 | ||
570 | static struct ext4_err_translation err_translation[] = { | |
571 | EXT4_ERR_TRANSLATE(EIO), | |
572 | EXT4_ERR_TRANSLATE(ENOMEM), | |
573 | EXT4_ERR_TRANSLATE(EFSBADCRC), | |
574 | EXT4_ERR_TRANSLATE(EFSCORRUPTED), | |
575 | EXT4_ERR_TRANSLATE(ENOSPC), | |
576 | EXT4_ERR_TRANSLATE(ENOKEY), | |
577 | EXT4_ERR_TRANSLATE(EROFS), | |
578 | EXT4_ERR_TRANSLATE(EFBIG), | |
579 | EXT4_ERR_TRANSLATE(EEXIST), | |
580 | EXT4_ERR_TRANSLATE(ERANGE), | |
581 | EXT4_ERR_TRANSLATE(EOVERFLOW), | |
582 | EXT4_ERR_TRANSLATE(EBUSY), | |
583 | EXT4_ERR_TRANSLATE(ENOTDIR), | |
584 | EXT4_ERR_TRANSLATE(ENOTEMPTY), | |
585 | EXT4_ERR_TRANSLATE(ESHUTDOWN), | |
586 | EXT4_ERR_TRANSLATE(EFAULT), | |
587 | }; | |
588 | ||
589 | static int ext4_errno_to_code(int errno) | |
590 | { | |
591 | int i; | |
592 | ||
593 | for (i = 0; i < ARRAY_SIZE(err_translation); i++) | |
594 | if (err_translation[i].errno == errno) | |
595 | return err_translation[i].code; | |
596 | return EXT4_ERR_UNKNOWN; | |
597 | } | |
598 | ||
2d01ddc8 JK |
599 | static void save_error_info(struct super_block *sb, int error, |
600 | __u32 ino, __u64 block, | |
601 | const char *func, unsigned int line) | |
40676623 | 602 | { |
c92dc856 | 603 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
40676623 | 604 | |
02a7780e JK |
605 | /* We default to EFSCORRUPTED error... */ |
606 | if (error == 0) | |
607 | error = EFSCORRUPTED; | |
c92dc856 JK |
608 | |
609 | spin_lock(&sbi->s_error_lock); | |
610 | sbi->s_add_error_count++; | |
611 | sbi->s_last_error_code = error; | |
612 | sbi->s_last_error_line = line; | |
613 | sbi->s_last_error_ino = ino; | |
614 | sbi->s_last_error_block = block; | |
615 | sbi->s_last_error_func = func; | |
616 | sbi->s_last_error_time = ktime_get_real_seconds(); | |
617 | if (!sbi->s_first_error_time) { | |
618 | sbi->s_first_error_code = error; | |
619 | sbi->s_first_error_line = line; | |
620 | sbi->s_first_error_ino = ino; | |
621 | sbi->s_first_error_block = block; | |
622 | sbi->s_first_error_func = func; | |
623 | sbi->s_first_error_time = sbi->s_last_error_time; | |
624 | } | |
625 | spin_unlock(&sbi->s_error_lock); | |
40676623 JK |
626 | } |
627 | ||
ac27a0ec DK |
628 | /* Deal with the reporting of failure conditions on a filesystem such as |
629 | * inconsistencies detected or read IO failures. | |
630 | * | |
631 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 632 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
633 | * write ordering constraints on the superblock which prevent us from |
634 | * writing it out straight away; and given that the journal is about to | |
635 | * be aborted, we can't rely on the current, or future, transactions to | |
636 | * write out the superblock safely. | |
637 | * | |
dab291af | 638 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 639 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec | 640 | * that error until we've noted it down and cleared it. |
014c9caa JK |
641 | * |
642 | * If force_ro is set, we unconditionally force the filesystem into an | |
643 | * ABORT|READONLY state, unless the error response on the fs has been set to | |
644 | * panic in which case we take the easy way out and panic immediately. This is | |
645 | * used to deal with unrecoverable failures such as journal IO errors or ENOMEM | |
646 | * at a critical moment in log management. | |
ac27a0ec | 647 | */ |
e789ca0c JK |
648 | static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, |
649 | __u32 ino, __u64 block, | |
650 | const char *func, unsigned int line) | |
ac27a0ec | 651 | { |
b08070ec | 652 | journal_t *journal = EXT4_SB(sb)->s_journal; |
2d01ddc8 | 653 | bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); |
b08070ec | 654 | |
e789ca0c | 655 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
327eaf73 TT |
656 | if (test_opt(sb, WARN_ON_ERROR)) |
657 | WARN_ON_ONCE(1); | |
658 | ||
2d01ddc8 JK |
659 | if (!continue_fs && !sb_rdonly(sb)) { |
660 | ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); | |
661 | if (journal) | |
662 | jbd2_journal_abort(journal, -EIO); | |
663 | } | |
664 | ||
665 | if (!bdev_read_only(sb->s_bdev)) { | |
e789ca0c | 666 | save_error_info(sb, error, ino, block, func, line); |
2d01ddc8 JK |
667 | /* |
668 | * In case the fs should keep running, we need to writeout | |
669 | * superblock through the journal. Due to lock ordering | |
670 | * constraints, it may not be safe to do it right here so we | |
671 | * defer superblock flushing to a workqueue. | |
672 | */ | |
bb9464e0 | 673 | if (continue_fs && journal) |
2d01ddc8 JK |
674 | schedule_work(&EXT4_SB(sb)->s_error_work); |
675 | else | |
676 | ext4_commit_super(sb); | |
677 | } | |
e789ca0c | 678 | |
1dc1097f JK |
679 | /* |
680 | * We force ERRORS_RO behavior when system is rebooting. Otherwise we | |
681 | * could panic during 'reboot -f' as the underlying device got already | |
682 | * disabled. | |
683 | */ | |
014c9caa | 684 | if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { |
617ba13b | 685 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec | 686 | sb->s_id); |
4327ba52 | 687 | } |
ac2f7ca5 YB |
688 | |
689 | if (sb_rdonly(sb) || continue_fs) | |
690 | return; | |
691 | ||
014c9caa JK |
692 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
693 | /* | |
694 | * Make sure updated value of ->s_mount_flags will be visible before | |
695 | * ->s_flags update | |
696 | */ | |
697 | smp_wmb(); | |
698 | sb->s_flags |= SB_RDONLY; | |
ac27a0ec DK |
699 | } |
700 | ||
c92dc856 JK |
701 | static void flush_stashed_error_work(struct work_struct *work) |
702 | { | |
703 | struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, | |
704 | s_error_work); | |
2d01ddc8 JK |
705 | journal_t *journal = sbi->s_journal; |
706 | handle_t *handle; | |
c92dc856 | 707 | |
2d01ddc8 JK |
708 | /* |
709 | * If the journal is still running, we have to write out superblock | |
710 | * through the journal to avoid collisions of other journalled sb | |
711 | * updates. | |
712 | * | |
713 | * We use directly jbd2 functions here to avoid recursing back into | |
714 | * ext4 error handling code during handling of previous errors. | |
715 | */ | |
716 | if (!sb_rdonly(sbi->s_sb) && journal) { | |
558d6450 | 717 | struct buffer_head *sbh = sbi->s_sbh; |
2d01ddc8 JK |
718 | handle = jbd2_journal_start(journal, 1); |
719 | if (IS_ERR(handle)) | |
720 | goto write_directly; | |
558d6450 | 721 | if (jbd2_journal_get_write_access(handle, sbh)) { |
2d01ddc8 JK |
722 | jbd2_journal_stop(handle); |
723 | goto write_directly; | |
724 | } | |
725 | ext4_update_super(sbi->s_sb); | |
558d6450 YB |
726 | if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { |
727 | ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " | |
728 | "superblock detected"); | |
729 | clear_buffer_write_io_error(sbh); | |
730 | set_buffer_uptodate(sbh); | |
731 | } | |
732 | ||
733 | if (jbd2_journal_dirty_metadata(handle, sbh)) { | |
2d01ddc8 JK |
734 | jbd2_journal_stop(handle); |
735 | goto write_directly; | |
736 | } | |
737 | jbd2_journal_stop(handle); | |
d578b994 | 738 | ext4_notify_error_sysfs(sbi); |
2d01ddc8 JK |
739 | return; |
740 | } | |
741 | write_directly: | |
742 | /* | |
743 | * Write through journal failed. Write sb directly to get error info | |
744 | * out and hope for the best. | |
745 | */ | |
4392fbc4 | 746 | ext4_commit_super(sbi->s_sb); |
d578b994 | 747 | ext4_notify_error_sysfs(sbi); |
ac27a0ec DK |
748 | } |
749 | ||
efbed4dc TT |
750 | #define ext4_error_ratelimit(sb) \ |
751 | ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ | |
752 | "EXT4-fs error") | |
753 | ||
12062ddd | 754 | void __ext4_error(struct super_block *sb, const char *function, |
014c9caa | 755 | unsigned int line, bool force_ro, int error, __u64 block, |
54d3adbc | 756 | const char *fmt, ...) |
ac27a0ec | 757 | { |
0ff2ea7d | 758 | struct va_format vaf; |
ac27a0ec DK |
759 | va_list args; |
760 | ||
0db1ff22 TT |
761 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
762 | return; | |
763 | ||
ccf0f32a | 764 | trace_ext4_error(sb, function, line); |
efbed4dc TT |
765 | if (ext4_error_ratelimit(sb)) { |
766 | va_start(args, fmt); | |
767 | vaf.fmt = fmt; | |
768 | vaf.va = &args; | |
769 | printk(KERN_CRIT | |
770 | "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", | |
771 | sb->s_id, function, line, current->comm, &vaf); | |
772 | va_end(args); | |
773 | } | |
9a089b21 GKB |
774 | fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); |
775 | ||
e789ca0c | 776 | ext4_handle_error(sb, force_ro, error, 0, block, function, line); |
ac27a0ec DK |
777 | } |
778 | ||
e7c96e8e | 779 | void __ext4_error_inode(struct inode *inode, const char *function, |
54d3adbc | 780 | unsigned int line, ext4_fsblk_t block, int error, |
e7c96e8e | 781 | const char *fmt, ...) |
273df556 FM |
782 | { |
783 | va_list args; | |
f7c21177 | 784 | struct va_format vaf; |
273df556 | 785 | |
0db1ff22 TT |
786 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
787 | return; | |
788 | ||
ccf0f32a | 789 | trace_ext4_error(inode->i_sb, function, line); |
efbed4dc TT |
790 | if (ext4_error_ratelimit(inode->i_sb)) { |
791 | va_start(args, fmt); | |
792 | vaf.fmt = fmt; | |
793 | vaf.va = &args; | |
794 | if (block) | |
795 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
796 | "inode #%lu: block %llu: comm %s: %pV\n", | |
797 | inode->i_sb->s_id, function, line, inode->i_ino, | |
798 | block, current->comm, &vaf); | |
799 | else | |
800 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " | |
801 | "inode #%lu: comm %s: %pV\n", | |
802 | inode->i_sb->s_id, function, line, inode->i_ino, | |
803 | current->comm, &vaf); | |
804 | va_end(args); | |
805 | } | |
9a089b21 GKB |
806 | fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); |
807 | ||
e789ca0c JK |
808 | ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, |
809 | function, line); | |
273df556 FM |
810 | } |
811 | ||
e7c96e8e JP |
812 | void __ext4_error_file(struct file *file, const char *function, |
813 | unsigned int line, ext4_fsblk_t block, | |
814 | const char *fmt, ...) | |
273df556 FM |
815 | { |
816 | va_list args; | |
f7c21177 | 817 | struct va_format vaf; |
496ad9aa | 818 | struct inode *inode = file_inode(file); |
273df556 FM |
819 | char pathname[80], *path; |
820 | ||
0db1ff22 TT |
821 | if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) |
822 | return; | |
823 | ||
ccf0f32a | 824 | trace_ext4_error(inode->i_sb, function, line); |
efbed4dc | 825 | if (ext4_error_ratelimit(inode->i_sb)) { |
9bf39ab2 | 826 | path = file_path(file, pathname, sizeof(pathname)); |
efbed4dc TT |
827 | if (IS_ERR(path)) |
828 | path = "(unknown)"; | |
829 | va_start(args, fmt); | |
830 | vaf.fmt = fmt; | |
831 | vaf.va = &args; | |
832 | if (block) | |
833 | printk(KERN_CRIT | |
834 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
835 | "block %llu: comm %s: path %s: %pV\n", | |
836 | inode->i_sb->s_id, function, line, inode->i_ino, | |
837 | block, current->comm, path, &vaf); | |
838 | else | |
839 | printk(KERN_CRIT | |
840 | "EXT4-fs error (device %s): %s:%d: inode #%lu: " | |
841 | "comm %s: path %s: %pV\n", | |
842 | inode->i_sb->s_id, function, line, inode->i_ino, | |
843 | current->comm, path, &vaf); | |
844 | va_end(args); | |
845 | } | |
9a089b21 GKB |
846 | fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); |
847 | ||
e789ca0c JK |
848 | ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, |
849 | function, line); | |
273df556 FM |
850 | } |
851 | ||
722887dd TT |
852 | const char *ext4_decode_error(struct super_block *sb, int errno, |
853 | char nbuf[16]) | |
ac27a0ec DK |
854 | { |
855 | char *errstr = NULL; | |
856 | ||
857 | switch (errno) { | |
6a797d27 DW |
858 | case -EFSCORRUPTED: |
859 | errstr = "Corrupt filesystem"; | |
860 | break; | |
861 | case -EFSBADCRC: | |
862 | errstr = "Filesystem failed CRC"; | |
863 | break; | |
ac27a0ec DK |
864 | case -EIO: |
865 | errstr = "IO failure"; | |
866 | break; | |
867 | case -ENOMEM: | |
868 | errstr = "Out of memory"; | |
869 | break; | |
870 | case -EROFS: | |
78f1ddbb TT |
871 | if (!sb || (EXT4_SB(sb)->s_journal && |
872 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
873 | errstr = "Journal has aborted"; |
874 | else | |
875 | errstr = "Readonly filesystem"; | |
876 | break; | |
877 | default: | |
878 | /* If the caller passed in an extra buffer for unknown | |
879 | * errors, textualise them now. Else we just return | |
880 | * NULL. */ | |
881 | if (nbuf) { | |
882 | /* Check for truncated error codes... */ | |
883 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
884 | errstr = nbuf; | |
885 | } | |
886 | break; | |
887 | } | |
888 | ||
889 | return errstr; | |
890 | } | |
891 | ||
617ba13b | 892 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
893 | * automatically and invokes the appropriate error response. */ |
894 | ||
c398eda0 TT |
895 | void __ext4_std_error(struct super_block *sb, const char *function, |
896 | unsigned int line, int errno) | |
ac27a0ec DK |
897 | { |
898 | char nbuf[16]; | |
899 | const char *errstr; | |
900 | ||
0db1ff22 TT |
901 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
902 | return; | |
903 | ||
ac27a0ec DK |
904 | /* Special case: if the error is EROFS, and we're not already |
905 | * inside a transaction, then there's really no point in logging | |
906 | * an error. */ | |
bc98a42c | 907 | if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) |
ac27a0ec DK |
908 | return; |
909 | ||
efbed4dc TT |
910 | if (ext4_error_ratelimit(sb)) { |
911 | errstr = ext4_decode_error(sb, errno, nbuf); | |
912 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", | |
913 | sb->s_id, function, line, errstr); | |
914 | } | |
9a089b21 | 915 | fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); |
ac27a0ec | 916 | |
e789ca0c | 917 | ext4_handle_error(sb, false, -errno, 0, 0, function, line); |
ac27a0ec DK |
918 | } |
919 | ||
e7c96e8e JP |
920 | void __ext4_msg(struct super_block *sb, |
921 | const char *prefix, const char *fmt, ...) | |
b31e1552 | 922 | { |
0ff2ea7d | 923 | struct va_format vaf; |
b31e1552 ES |
924 | va_list args; |
925 | ||
da812f61 LC |
926 | if (sb) { |
927 | atomic_inc(&EXT4_SB(sb)->s_msg_count); | |
928 | if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), | |
929 | "EXT4-fs")) | |
930 | return; | |
931 | } | |
efbed4dc | 932 | |
b31e1552 | 933 | va_start(args, fmt); |
0ff2ea7d JP |
934 | vaf.fmt = fmt; |
935 | vaf.va = &args; | |
da812f61 LC |
936 | if (sb) |
937 | printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); | |
938 | else | |
939 | printk("%sEXT4-fs: %pV\n", prefix, &vaf); | |
b31e1552 ES |
940 | va_end(args); |
941 | } | |
942 | ||
1cf006ed DM |
943 | static int ext4_warning_ratelimit(struct super_block *sb) |
944 | { | |
945 | atomic_inc(&EXT4_SB(sb)->s_warning_count); | |
946 | return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), | |
947 | "EXT4-fs warning"); | |
948 | } | |
b03a2f7e | 949 | |
12062ddd | 950 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 951 | unsigned int line, const char *fmt, ...) |
ac27a0ec | 952 | { |
0ff2ea7d | 953 | struct va_format vaf; |
ac27a0ec DK |
954 | va_list args; |
955 | ||
b03a2f7e | 956 | if (!ext4_warning_ratelimit(sb)) |
efbed4dc TT |
957 | return; |
958 | ||
ac27a0ec | 959 | va_start(args, fmt); |
0ff2ea7d JP |
960 | vaf.fmt = fmt; |
961 | vaf.va = &args; | |
962 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", | |
963 | sb->s_id, function, line, &vaf); | |
ac27a0ec DK |
964 | va_end(args); |
965 | } | |
966 | ||
b03a2f7e AD |
967 | void __ext4_warning_inode(const struct inode *inode, const char *function, |
968 | unsigned int line, const char *fmt, ...) | |
969 | { | |
970 | struct va_format vaf; | |
971 | va_list args; | |
972 | ||
973 | if (!ext4_warning_ratelimit(inode->i_sb)) | |
974 | return; | |
975 | ||
976 | va_start(args, fmt); | |
977 | vaf.fmt = fmt; | |
978 | vaf.va = &args; | |
979 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " | |
980 | "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, | |
981 | function, line, inode->i_ino, current->comm, &vaf); | |
982 | va_end(args); | |
983 | } | |
984 | ||
e29136f8 TT |
985 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
986 | struct super_block *sb, ext4_group_t grp, | |
987 | unsigned long ino, ext4_fsblk_t block, | |
988 | const char *fmt, ...) | |
5d1b1b3f AK |
989 | __releases(bitlock) |
990 | __acquires(bitlock) | |
991 | { | |
0ff2ea7d | 992 | struct va_format vaf; |
5d1b1b3f | 993 | va_list args; |
5d1b1b3f | 994 | |
0db1ff22 TT |
995 | if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) |
996 | return; | |
997 | ||
ccf0f32a | 998 | trace_ext4_error(sb, function, line); |
efbed4dc TT |
999 | if (ext4_error_ratelimit(sb)) { |
1000 | va_start(args, fmt); | |
1001 | vaf.fmt = fmt; | |
1002 | vaf.va = &args; | |
1003 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", | |
1004 | sb->s_id, function, line, grp); | |
1005 | if (ino) | |
1006 | printk(KERN_CONT "inode %lu: ", ino); | |
1007 | if (block) | |
1008 | printk(KERN_CONT "block %llu:", | |
1009 | (unsigned long long) block); | |
1010 | printk(KERN_CONT "%pV\n", &vaf); | |
1011 | va_end(args); | |
1012 | } | |
5d1b1b3f AK |
1013 | |
1014 | if (test_opt(sb, ERRORS_CONT)) { | |
c92dc856 JK |
1015 | if (test_opt(sb, WARN_ON_ERROR)) |
1016 | WARN_ON_ONCE(1); | |
e789ca0c | 1017 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
2d01ddc8 JK |
1018 | if (!bdev_read_only(sb->s_bdev)) { |
1019 | save_error_info(sb, EFSCORRUPTED, ino, block, function, | |
1020 | line); | |
e789ca0c | 1021 | schedule_work(&EXT4_SB(sb)->s_error_work); |
2d01ddc8 | 1022 | } |
5d1b1b3f AK |
1023 | return; |
1024 | } | |
1025 | ext4_unlock_group(sb, grp); | |
e789ca0c | 1026 | ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); |
5d1b1b3f AK |
1027 | /* |
1028 | * We only get here in the ERRORS_RO case; relocking the group | |
1029 | * may be dangerous, but nothing bad will happen since the | |
1030 | * filesystem will have already been marked read/only and the | |
1031 | * journal has been aborted. We return 1 as a hint to callers | |
1032 | * who might what to use the return value from | |
25985edc | 1033 | * ext4_grp_locked_error() to distinguish between the |
5d1b1b3f AK |
1034 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more |
1035 | * aggressively from the ext4 function in question, with a | |
1036 | * more appropriate error code. | |
1037 | */ | |
1038 | ext4_lock_group(sb, grp); | |
1039 | return; | |
1040 | } | |
1041 | ||
db79e6d1 WS |
1042 | void ext4_mark_group_bitmap_corrupted(struct super_block *sb, |
1043 | ext4_group_t group, | |
1044 | unsigned int flags) | |
1045 | { | |
1046 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1047 | struct ext4_group_info *grp = ext4_get_group_info(sb, group); | |
1048 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); | |
9af0b3d1 WS |
1049 | int ret; |
1050 | ||
1051 | if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { | |
1052 | ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, | |
1053 | &grp->bb_state); | |
1054 | if (!ret) | |
1055 | percpu_counter_sub(&sbi->s_freeclusters_counter, | |
1056 | grp->bb_free); | |
db79e6d1 WS |
1057 | } |
1058 | ||
9af0b3d1 WS |
1059 | if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { |
1060 | ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, | |
1061 | &grp->bb_state); | |
1062 | if (!ret && gdp) { | |
db79e6d1 WS |
1063 | int count; |
1064 | ||
1065 | count = ext4_free_inodes_count(sb, gdp); | |
1066 | percpu_counter_sub(&sbi->s_freeinodes_counter, | |
1067 | count); | |
1068 | } | |
db79e6d1 WS |
1069 | } |
1070 | } | |
1071 | ||
617ba13b | 1072 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 1073 | { |
617ba13b | 1074 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 1075 | |
617ba13b | 1076 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
1077 | return; |
1078 | ||
12062ddd | 1079 | ext4_warning(sb, |
ac27a0ec DK |
1080 | "updating to rev %d because of new feature flag, " |
1081 | "running e2fsck is recommended", | |
617ba13b | 1082 | EXT4_DYNAMIC_REV); |
ac27a0ec | 1083 | |
617ba13b MC |
1084 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
1085 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
1086 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
1087 | /* leave es->s_feature_*compat flags alone */ |
1088 | /* es->s_uuid will be set by e2fsck if empty */ | |
1089 | ||
1090 | /* | |
1091 | * The rest of the superblock fields should be zero, and if not it | |
1092 | * means they are likely already in use, so leave them alone. We | |
1093 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
1094 | */ | |
1095 | } | |
1096 | ||
1097 | /* | |
1098 | * Open the external journal device | |
1099 | */ | |
b31e1552 | 1100 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
1101 | { |
1102 | struct block_device *bdev; | |
ac27a0ec | 1103 | |
d4d77629 | 1104 | bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
1105 | if (IS_ERR(bdev)) |
1106 | goto fail; | |
1107 | return bdev; | |
1108 | ||
1109 | fail: | |
ea3edd4d CH |
1110 | ext4_msg(sb, KERN_ERR, |
1111 | "failed to open journal device unknown-block(%u,%u) %ld", | |
1112 | MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); | |
ac27a0ec DK |
1113 | return NULL; |
1114 | } | |
1115 | ||
1116 | /* | |
1117 | * Release the journal device | |
1118 | */ | |
4385bab1 | 1119 | static void ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 1120 | { |
4385bab1 | 1121 | blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
1122 | } |
1123 | ||
4385bab1 | 1124 | static void ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
1125 | { |
1126 | struct block_device *bdev; | |
ee7ed3aa | 1127 | bdev = sbi->s_journal_bdev; |
ac27a0ec | 1128 | if (bdev) { |
4385bab1 | 1129 | ext4_blkdev_put(bdev); |
ee7ed3aa | 1130 | sbi->s_journal_bdev = NULL; |
ac27a0ec | 1131 | } |
ac27a0ec DK |
1132 | } |
1133 | ||
1134 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
1135 | { | |
617ba13b | 1136 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
1137 | } |
1138 | ||
617ba13b | 1139 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
1140 | { |
1141 | struct list_head *l; | |
1142 | ||
b31e1552 ES |
1143 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
1144 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
1145 | |
1146 | printk(KERN_ERR "sb_info orphan list:\n"); | |
1147 | list_for_each(l, &sbi->s_orphan) { | |
1148 | struct inode *inode = orphan_list_entry(l); | |
1149 | printk(KERN_ERR " " | |
1150 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
1151 | inode->i_sb->s_id, inode->i_ino, inode, | |
1152 | inode->i_mode, inode->i_nlink, | |
1153 | NEXT_ORPHAN(inode)); | |
1154 | } | |
1155 | } | |
1156 | ||
957153fc JK |
1157 | #ifdef CONFIG_QUOTA |
1158 | static int ext4_quota_off(struct super_block *sb, int type); | |
1159 | ||
1160 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
1161 | { | |
1162 | int type; | |
1163 | ||
964edf66 JK |
1164 | /* Use our quota_off function to clear inode flags etc. */ |
1165 | for (type = 0; type < EXT4_MAXQUOTAS; type++) | |
1166 | ext4_quota_off(sb, type); | |
957153fc | 1167 | } |
33458eab TT |
1168 | |
1169 | /* | |
1170 | * This is a helper function which is used in the mount/remount | |
1171 | * codepaths (which holds s_umount) to fetch the quota file name. | |
1172 | */ | |
1173 | static inline char *get_qf_name(struct super_block *sb, | |
1174 | struct ext4_sb_info *sbi, | |
1175 | int type) | |
1176 | { | |
1177 | return rcu_dereference_protected(sbi->s_qf_names[type], | |
1178 | lockdep_is_held(&sb->s_umount)); | |
1179 | } | |
957153fc JK |
1180 | #else |
1181 | static inline void ext4_quota_off_umount(struct super_block *sb) | |
1182 | { | |
1183 | } | |
1184 | #endif | |
1185 | ||
1f79467c JY |
1186 | static int ext4_percpu_param_init(struct ext4_sb_info *sbi) |
1187 | { | |
1188 | ext4_fsblk_t block; | |
1189 | int err; | |
1190 | ||
1191 | block = ext4_count_free_clusters(sbi->s_sb); | |
1192 | ext4_free_blocks_count_set(sbi->s_es, EXT4_C2B(sbi, block)); | |
1193 | err = percpu_counter_init(&sbi->s_freeclusters_counter, block, | |
1194 | GFP_KERNEL); | |
1195 | if (!err) { | |
1196 | unsigned long freei = ext4_count_free_inodes(sbi->s_sb); | |
1197 | sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); | |
1198 | err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, | |
1199 | GFP_KERNEL); | |
1200 | } | |
1201 | if (!err) | |
1202 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
1203 | ext4_count_dirs(sbi->s_sb), GFP_KERNEL); | |
1204 | if (!err) | |
1205 | err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, | |
1206 | GFP_KERNEL); | |
1207 | if (!err) | |
1208 | err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, | |
1209 | GFP_KERNEL); | |
1210 | if (!err) | |
1211 | err = percpu_init_rwsem(&sbi->s_writepages_rwsem); | |
1212 | ||
1213 | if (err) | |
1214 | ext4_msg(sbi->s_sb, KERN_ERR, "insufficient memory"); | |
1215 | ||
1216 | return err; | |
1217 | } | |
1218 | ||
1219 | static void ext4_percpu_param_destroy(struct ext4_sb_info *sbi) | |
1220 | { | |
1221 | percpu_counter_destroy(&sbi->s_freeclusters_counter); | |
1222 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
1223 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
1224 | percpu_counter_destroy(&sbi->s_dirtyclusters_counter); | |
1225 | percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); | |
1226 | percpu_free_rwsem(&sbi->s_writepages_rwsem); | |
1227 | } | |
1228 | ||
6ef68498 JY |
1229 | static void ext4_group_desc_free(struct ext4_sb_info *sbi) |
1230 | { | |
1231 | struct buffer_head **group_desc; | |
1232 | int i; | |
1233 | ||
1234 | rcu_read_lock(); | |
1235 | group_desc = rcu_dereference(sbi->s_group_desc); | |
1236 | for (i = 0; i < sbi->s_gdb_count; i++) | |
1237 | brelse(group_desc[i]); | |
1238 | kvfree(group_desc); | |
1239 | rcu_read_unlock(); | |
1240 | } | |
1241 | ||
dcbf8758 JY |
1242 | static void ext4_flex_groups_free(struct ext4_sb_info *sbi) |
1243 | { | |
1244 | struct flex_groups **flex_groups; | |
1245 | int i; | |
1246 | ||
1247 | rcu_read_lock(); | |
1248 | flex_groups = rcu_dereference(sbi->s_flex_groups); | |
1249 | if (flex_groups) { | |
1250 | for (i = 0; i < sbi->s_flex_groups_allocated; i++) | |
1251 | kvfree(flex_groups[i]); | |
1252 | kvfree(flex_groups); | |
1253 | } | |
1254 | rcu_read_unlock(); | |
1255 | } | |
1256 | ||
2b2d6d01 | 1257 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 1258 | { |
617ba13b MC |
1259 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1260 | struct ext4_super_block *es = sbi->s_es; | |
97abd7d4 | 1261 | int aborted = 0; |
856dd6c5 | 1262 | int err; |
ac27a0ec | 1263 | |
5e47868f RH |
1264 | /* |
1265 | * Unregister sysfs before destroying jbd2 journal. | |
1266 | * Since we could still access attr_journal_task attribute via sysfs | |
1267 | * path which could have sbi->s_journal->j_task as NULL | |
b98535d0 YB |
1268 | * Unregister sysfs before flush sbi->s_error_work. |
1269 | * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If | |
1270 | * read metadata verify failed then will queue error work. | |
1271 | * flush_stashed_error_work will call start_this_handle may trigger | |
1272 | * BUG_ON. | |
5e47868f RH |
1273 | */ |
1274 | ext4_unregister_sysfs(sb); | |
1275 | ||
4808cb5b | 1276 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) |
bb0fbc78 LC |
1277 | ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", |
1278 | &sb->s_uuid); | |
4808cb5b | 1279 | |
b98535d0 YB |
1280 | ext4_unregister_li_request(sb); |
1281 | ext4_quota_off_umount(sb); | |
1282 | ||
1283 | flush_work(&sbi->s_error_work); | |
1284 | destroy_workqueue(sbi->rsv_conversion_wq); | |
1285 | ext4_release_orphan_info(sb); | |
1286 | ||
0390131b | 1287 | if (sbi->s_journal) { |
97abd7d4 | 1288 | aborted = is_journal_aborted(sbi->s_journal); |
0390131b FM |
1289 | err = jbd2_journal_destroy(sbi->s_journal); |
1290 | sbi->s_journal = NULL; | |
878520ac | 1291 | if ((err < 0) && !aborted) { |
54d3adbc | 1292 | ext4_abort(sb, -err, "Couldn't clean up the journal"); |
878520ac | 1293 | } |
0390131b | 1294 | } |
d4edac31 | 1295 | |
d3922a77 | 1296 | ext4_es_unregister_shrinker(sbi); |
292a089d | 1297 | timer_shutdown_sync(&sbi->s_err_report); |
d4edac31 JB |
1298 | ext4_release_system_zone(sb); |
1299 | ext4_mb_release(sb); | |
1300 | ext4_ext_release(sb); | |
d4edac31 | 1301 | |
bc98a42c | 1302 | if (!sb_rdonly(sb) && !aborted) { |
e2b911c5 | 1303 | ext4_clear_feature_journal_needs_recovery(sb); |
02f310fc | 1304 | ext4_clear_feature_orphan_present(sb); |
ac27a0ec | 1305 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
ac27a0ec | 1306 | } |
bc98a42c | 1307 | if (!sb_rdonly(sb)) |
4392fbc4 | 1308 | ext4_commit_super(sb); |
a8e25a83 | 1309 | |
6ef68498 | 1310 | ext4_group_desc_free(sbi); |
dcbf8758 | 1311 | ext4_flex_groups_free(sbi); |
1f79467c | 1312 | ext4_percpu_param_destroy(sbi); |
ac27a0ec | 1313 | #ifdef CONFIG_QUOTA |
856dd6c5 | 1314 | for (int i = 0; i < EXT4_MAXQUOTAS; i++) |
33458eab | 1315 | kfree(get_qf_name(sb, sbi, i)); |
ac27a0ec DK |
1316 | #endif |
1317 | ||
1318 | /* Debugging code just in case the in-memory inode orphan list | |
1319 | * isn't empty. The on-disk one can be non-empty if we've | |
1320 | * detected an error and taken the fs readonly, but the | |
1321 | * in-memory list had better be clean by this point. */ | |
1322 | if (!list_empty(&sbi->s_orphan)) | |
1323 | dump_orphan_list(sb, sbi); | |
837c23fb | 1324 | ASSERT(list_empty(&sbi->s_orphan)); |
ac27a0ec | 1325 | |
89d96a6f | 1326 | sync_blockdev(sb->s_bdev); |
f98393a6 | 1327 | invalidate_bdev(sb->s_bdev); |
ee7ed3aa | 1328 | if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { |
ac27a0ec DK |
1329 | /* |
1330 | * Invalidate the journal device's buffers. We don't want them | |
1331 | * floating about in memory - the physical journal device may | |
1332 | * hotswapped, and it breaks the `ro-after' testing code. | |
1333 | */ | |
ee7ed3aa CX |
1334 | sync_blockdev(sbi->s_journal_bdev); |
1335 | invalidate_bdev(sbi->s_journal_bdev); | |
617ba13b | 1336 | ext4_blkdev_remove(sbi); |
ac27a0ec | 1337 | } |
50c15df6 CX |
1338 | |
1339 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); | |
1340 | sbi->s_ea_inode_cache = NULL; | |
1341 | ||
1342 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
1343 | sbi->s_ea_block_cache = NULL; | |
1344 | ||
618f0031 PS |
1345 | ext4_stop_mmpd(sbi); |
1346 | ||
9060dd2c | 1347 | brelse(sbi->s_sbh); |
ac27a0ec | 1348 | sb->s_fs_info = NULL; |
3197ebdb TT |
1349 | /* |
1350 | * Now that we are completely done shutting down the | |
1351 | * superblock, we need to actually destroy the kobject. | |
1352 | */ | |
3197ebdb TT |
1353 | kobject_put(&sbi->s_kobj); |
1354 | wait_for_completion(&sbi->s_kobj_unregister); | |
0441984a DW |
1355 | if (sbi->s_chksum_driver) |
1356 | crypto_free_shash(sbi->s_chksum_driver); | |
705895b6 | 1357 | kfree(sbi->s_blockgroup_lock); |
8012b866 | 1358 | fs_put_dax(sbi->s_daxdev, NULL); |
ac4acb1f | 1359 | fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); |
5298d4bf | 1360 | #if IS_ENABLED(CONFIG_UNICODE) |
f8f4acb6 | 1361 | utf8_unload(sb->s_encoding); |
c83ad55e | 1362 | #endif |
ac27a0ec | 1363 | kfree(sbi); |
ac27a0ec DK |
1364 | } |
1365 | ||
e18b890b | 1366 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
1367 | |
1368 | /* | |
1369 | * Called inside transaction, so use GFP_NOFS | |
1370 | */ | |
617ba13b | 1371 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 1372 | { |
617ba13b | 1373 | struct ext4_inode_info *ei; |
ac27a0ec | 1374 | |
fd60b288 | 1375 | ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
1376 | if (!ei) |
1377 | return NULL; | |
0b8e58a1 | 1378 | |
ee73f9a5 | 1379 | inode_set_iversion(&ei->vfs_inode, 1); |
7ea71af9 | 1380 | ei->i_flags = 0; |
202ee5df | 1381 | spin_lock_init(&ei->i_raw_lock); |
38727786 | 1382 | ei->i_prealloc_node = RB_ROOT; |
27bc446e | 1383 | atomic_set(&ei->i_prealloc_active, 0); |
38727786 | 1384 | rwlock_init(&ei->i_prealloc_lock); |
9a26b661 ZL |
1385 | ext4_es_init_tree(&ei->i_es_tree); |
1386 | rwlock_init(&ei->i_es_lock); | |
edaa53ca | 1387 | INIT_LIST_HEAD(&ei->i_es_list); |
eb68d0e2 | 1388 | ei->i_es_all_nr = 0; |
edaa53ca | 1389 | ei->i_es_shk_nr = 0; |
dd475925 | 1390 | ei->i_es_shrink_lblk = 0; |
d2a17637 | 1391 | ei->i_reserved_data_blocks = 0; |
d2a17637 | 1392 | spin_lock_init(&(ei->i_block_reservation_lock)); |
1dc0aa46 | 1393 | ext4_init_pending_tree(&ei->i_pending_tree); |
a9e7f447 DM |
1394 | #ifdef CONFIG_QUOTA |
1395 | ei->i_reserved_quota = 0; | |
96c7e0d9 | 1396 | memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); |
a9e7f447 | 1397 | #endif |
8aefcd55 | 1398 | ei->jinode = NULL; |
2e8fa54e | 1399 | INIT_LIST_HEAD(&ei->i_rsv_conversion_list); |
744692dc | 1400 | spin_lock_init(&ei->i_completed_io_lock); |
b436b9be JK |
1401 | ei->i_sync_tid = 0; |
1402 | ei->i_datasync_tid = 0; | |
e27f41e1 | 1403 | atomic_set(&ei->i_unwritten, 0); |
2e8fa54e | 1404 | INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); |
aa75f4d3 HS |
1405 | ext4_fc_init_inode(&ei->vfs_inode); |
1406 | mutex_init(&ei->i_fc_lock); | |
ac27a0ec DK |
1407 | return &ei->vfs_inode; |
1408 | } | |
1409 | ||
7ff9c073 TT |
1410 | static int ext4_drop_inode(struct inode *inode) |
1411 | { | |
1412 | int drop = generic_drop_inode(inode); | |
1413 | ||
29b3692e EB |
1414 | if (!drop) |
1415 | drop = fscrypt_drop_inode(inode); | |
1416 | ||
7ff9c073 TT |
1417 | trace_ext4_drop_inode(inode, drop); |
1418 | return drop; | |
1419 | } | |
1420 | ||
94053139 | 1421 | static void ext4_free_in_core_inode(struct inode *inode) |
fa0d7e3d | 1422 | { |
2c58d548 | 1423 | fscrypt_free_inode(inode); |
aa75f4d3 HS |
1424 | if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { |
1425 | pr_warn("%s: inode %ld still in fc list", | |
1426 | __func__, inode->i_ino); | |
1427 | } | |
fa0d7e3d NP |
1428 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
1429 | } | |
1430 | ||
617ba13b | 1431 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 1432 | { |
9f7dd93d | 1433 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
1434 | ext4_msg(inode->i_sb, KERN_ERR, |
1435 | "Inode %lu (%p): orphan list check failed!", | |
1436 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
1437 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
1438 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
1439 | true); | |
1440 | dump_stack(); | |
1441 | } | |
6fed8395 JX |
1442 | |
1443 | if (EXT4_I(inode)->i_reserved_data_blocks) | |
1444 | ext4_msg(inode->i_sb, KERN_ERR, | |
1445 | "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", | |
1446 | inode->i_ino, EXT4_I(inode), | |
1447 | EXT4_I(inode)->i_reserved_data_blocks); | |
ac27a0ec DK |
1448 | } |
1449 | ||
51cc5068 | 1450 | static void init_once(void *foo) |
ac27a0ec | 1451 | { |
c30365b9 | 1452 | struct ext4_inode_info *ei = foo; |
ac27a0ec | 1453 | |
a35afb83 | 1454 | INIT_LIST_HEAD(&ei->i_orphan); |
a35afb83 | 1455 | init_rwsem(&ei->xattr_sem); |
0e855ac8 | 1456 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 1457 | inode_init_once(&ei->vfs_inode); |
aa75f4d3 | 1458 | ext4_fc_init_inode(&ei->vfs_inode); |
ac27a0ec DK |
1459 | } |
1460 | ||
e67bc2b3 | 1461 | static int __init init_inodecache(void) |
ac27a0ec | 1462 | { |
f8dd7c70 DW |
1463 | ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", |
1464 | sizeof(struct ext4_inode_info), 0, | |
1465 | (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| | |
1466 | SLAB_ACCOUNT), | |
1467 | offsetof(struct ext4_inode_info, i_data), | |
1468 | sizeof_field(struct ext4_inode_info, i_data), | |
1469 | init_once); | |
617ba13b | 1470 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
1471 | return -ENOMEM; |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static void destroy_inodecache(void) | |
1476 | { | |
8c0a8537 KS |
1477 | /* |
1478 | * Make sure all delayed rcu free inodes are flushed before we | |
1479 | * destroy cache. | |
1480 | */ | |
1481 | rcu_barrier(); | |
617ba13b | 1482 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
1483 | } |
1484 | ||
0930fcc1 | 1485 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 1486 | { |
aa75f4d3 | 1487 | ext4_fc_del(inode); |
0930fcc1 | 1488 | invalidate_inode_buffers(inode); |
dbd5768f | 1489 | clear_inode(inode); |
27bc446e | 1490 | ext4_discard_preallocations(inode, 0); |
51865fda | 1491 | ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); |
f4c2d372 | 1492 | dquot_drop(inode); |
8aefcd55 TT |
1493 | if (EXT4_I(inode)->jinode) { |
1494 | jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), | |
1495 | EXT4_I(inode)->jinode); | |
1496 | jbd2_free_inode(EXT4_I(inode)->jinode); | |
1497 | EXT4_I(inode)->jinode = NULL; | |
1498 | } | |
3d204e24 | 1499 | fscrypt_put_encryption_info(inode); |
c93d8f88 | 1500 | fsverity_cleanup_inode(inode); |
ac27a0ec DK |
1501 | } |
1502 | ||
1b961ac0 | 1503 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1504 | u64 ino, u32 generation) |
ac27a0ec | 1505 | { |
ac27a0ec | 1506 | struct inode *inode; |
ac27a0ec | 1507 | |
8a363970 | 1508 | /* |
ac27a0ec DK |
1509 | * Currently we don't know the generation for parent directory, so |
1510 | * a generation of 0 means "accept any" | |
1511 | */ | |
8a363970 | 1512 | inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); |
1d1fe1ee DH |
1513 | if (IS_ERR(inode)) |
1514 | return ERR_CAST(inode); | |
1515 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1516 | iput(inode); |
1517 | return ERR_PTR(-ESTALE); | |
1518 | } | |
1b961ac0 CH |
1519 | |
1520 | return inode; | |
1521 | } | |
1522 | ||
1523 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1524 | int fh_len, int fh_type) |
1b961ac0 CH |
1525 | { |
1526 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1527 | ext4_nfs_get_inode); | |
1528 | } | |
1529 | ||
1530 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1531 | int fh_len, int fh_type) |
1b961ac0 CH |
1532 | { |
1533 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1534 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1535 | } |
1536 | ||
fde87268 TT |
1537 | static int ext4_nfs_commit_metadata(struct inode *inode) |
1538 | { | |
1539 | struct writeback_control wbc = { | |
1540 | .sync_mode = WB_SYNC_ALL | |
1541 | }; | |
1542 | ||
1543 | trace_ext4_nfs_commit_metadata(inode); | |
1544 | return ext4_write_inode(inode, &wbc); | |
1545 | } | |
1546 | ||
ac27a0ec | 1547 | #ifdef CONFIG_QUOTA |
d6006186 | 1548 | static const char * const quotatypes[] = INITQFNAMES; |
689c958c | 1549 | #define QTYPE2NAME(t) (quotatypes[t]) |
ac27a0ec | 1550 | |
617ba13b MC |
1551 | static int ext4_write_dquot(struct dquot *dquot); |
1552 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1553 | static int ext4_release_dquot(struct dquot *dquot); | |
1554 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1555 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1556 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 1557 | const struct path *path); |
617ba13b | 1558 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec | 1559 | size_t len, loff_t off); |
617ba13b | 1560 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec | 1561 | const char *data, size_t len, loff_t off); |
7c319d32 AK |
1562 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
1563 | unsigned int flags); | |
ac27a0ec | 1564 | |
96c7e0d9 JK |
1565 | static struct dquot **ext4_get_dquots(struct inode *inode) |
1566 | { | |
1567 | return EXT4_I(inode)->i_dquot; | |
1568 | } | |
1569 | ||
61e225dc | 1570 | static const struct dquot_operations ext4_quota_operations = { |
7a9ca53a TE |
1571 | .get_reserved_space = ext4_get_reserved_space, |
1572 | .write_dquot = ext4_write_dquot, | |
1573 | .acquire_dquot = ext4_acquire_dquot, | |
1574 | .release_dquot = ext4_release_dquot, | |
1575 | .mark_dirty = ext4_mark_dquot_dirty, | |
1576 | .write_info = ext4_write_info, | |
1577 | .alloc_dquot = dquot_alloc, | |
1578 | .destroy_dquot = dquot_destroy, | |
1579 | .get_projid = ext4_get_projid, | |
1580 | .get_inode_usage = ext4_get_inode_usage, | |
ebc11f7b | 1581 | .get_next_id = dquot_get_next_id, |
ac27a0ec DK |
1582 | }; |
1583 | ||
0d54b217 | 1584 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1585 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1586 | .quota_off = ext4_quota_off, |
287a8095 | 1587 | .quota_sync = dquot_quota_sync, |
0a240339 | 1588 | .get_state = dquot_get_state, |
287a8095 CH |
1589 | .set_info = dquot_set_dqinfo, |
1590 | .get_dqblk = dquot_get_dqblk, | |
6332b9b5 ES |
1591 | .set_dqblk = dquot_set_dqblk, |
1592 | .get_nextdqblk = dquot_get_next_dqblk, | |
ac27a0ec DK |
1593 | }; |
1594 | #endif | |
1595 | ||
ee9b6d61 | 1596 | static const struct super_operations ext4_sops = { |
617ba13b | 1597 | .alloc_inode = ext4_alloc_inode, |
94053139 | 1598 | .free_inode = ext4_free_in_core_inode, |
617ba13b | 1599 | .destroy_inode = ext4_destroy_inode, |
617ba13b MC |
1600 | .write_inode = ext4_write_inode, |
1601 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1602 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1603 | .evict_inode = ext4_evict_inode, |
617ba13b | 1604 | .put_super = ext4_put_super, |
617ba13b | 1605 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1606 | .freeze_fs = ext4_freeze, |
1607 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b | 1608 | .statfs = ext4_statfs, |
617ba13b | 1609 | .show_options = ext4_show_options, |
ac27a0ec | 1610 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1611 | .quota_read = ext4_quota_read, |
1612 | .quota_write = ext4_quota_write, | |
96c7e0d9 | 1613 | .get_dquots = ext4_get_dquots, |
ac27a0ec DK |
1614 | #endif |
1615 | }; | |
1616 | ||
39655164 | 1617 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1618 | .fh_to_dentry = ext4_fh_to_dentry, |
1619 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1620 | .get_parent = ext4_get_parent, |
fde87268 | 1621 | .commit_metadata = ext4_nfs_commit_metadata, |
ac27a0ec DK |
1622 | }; |
1623 | ||
1624 | enum { | |
1625 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
ba2e524d | 1626 | Opt_resgid, Opt_resuid, Opt_sb, |
72578c33 | 1627 | Opt_nouid32, Opt_debug, Opt_removed, |
2d544ec9 | 1628 | Opt_user_xattr, Opt_acl, |
72578c33 | 1629 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, |
ad4eec61 ES |
1630 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, |
1631 | Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, | |
ac27a0ec | 1632 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
6ddb2447 | 1633 | Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, |
4f74d15f | 1634 | Opt_inlinecrypt, |
ba2e524d | 1635 | Opt_usrjquota, Opt_grpjquota, Opt_quota, |
ee4a3fcd | 1636 | Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, |
1ff20307 | 1637 | Opt_usrquota, Opt_grpquota, Opt_prjquota, |
9cb20f94 | 1638 | Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, |
327eaf73 | 1639 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, |
4437992b | 1640 | Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, |
1449032b | 1641 | Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1642 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1643 | Opt_dioread_nolock, Opt_dioread_lock, |
fc6cb1cd | 1644 | Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, |
cdb7ee4c | 1645 | Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, |
21175ca4 | 1646 | Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, |
e5a185c2 | 1647 | Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, |
8016e29f | 1648 | #ifdef CONFIG_EXT4_DEBUG |
99c880de | 1649 | Opt_fc_debug_max_replay, Opt_fc_debug_force |
8016e29f | 1650 | #endif |
ac27a0ec DK |
1651 | }; |
1652 | ||
e5a185c2 | 1653 | static const struct constant_table ext4_param_errors[] = { |
ba2e524d LC |
1654 | {"continue", EXT4_MOUNT_ERRORS_CONT}, |
1655 | {"panic", EXT4_MOUNT_ERRORS_PANIC}, | |
1656 | {"remount-ro", EXT4_MOUNT_ERRORS_RO}, | |
e5a185c2 LC |
1657 | {} |
1658 | }; | |
1659 | ||
1660 | static const struct constant_table ext4_param_data[] = { | |
ba2e524d LC |
1661 | {"journal", EXT4_MOUNT_JOURNAL_DATA}, |
1662 | {"ordered", EXT4_MOUNT_ORDERED_DATA}, | |
1663 | {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, | |
e5a185c2 LC |
1664 | {} |
1665 | }; | |
1666 | ||
1667 | static const struct constant_table ext4_param_data_err[] = { | |
1668 | {"abort", Opt_data_err_abort}, | |
1669 | {"ignore", Opt_data_err_ignore}, | |
1670 | {} | |
1671 | }; | |
1672 | ||
1673 | static const struct constant_table ext4_param_jqfmt[] = { | |
ba2e524d LC |
1674 | {"vfsold", QFMT_VFS_OLD}, |
1675 | {"vfsv0", QFMT_VFS_V0}, | |
1676 | {"vfsv1", QFMT_VFS_V1}, | |
e5a185c2 LC |
1677 | {} |
1678 | }; | |
1679 | ||
1680 | static const struct constant_table ext4_param_dax[] = { | |
1681 | {"always", Opt_dax_always}, | |
1682 | {"inode", Opt_dax_inode}, | |
1683 | {"never", Opt_dax_never}, | |
1684 | {} | |
1685 | }; | |
1686 | ||
1687 | /* String parameter that allows empty argument */ | |
1688 | #define fsparam_string_empty(NAME, OPT) \ | |
1689 | __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) | |
1690 | ||
1691 | /* | |
1692 | * Mount option specification | |
1693 | * We don't use fsparam_flag_no because of the way we set the | |
1694 | * options and the way we show them in _ext4_show_options(). To | |
1695 | * keep the changes to a minimum, let's keep the negative options | |
1696 | * separate for now. | |
1697 | */ | |
1698 | static const struct fs_parameter_spec ext4_param_specs[] = { | |
1699 | fsparam_flag ("bsddf", Opt_bsd_df), | |
1700 | fsparam_flag ("minixdf", Opt_minix_df), | |
1701 | fsparam_flag ("grpid", Opt_grpid), | |
1702 | fsparam_flag ("bsdgroups", Opt_grpid), | |
1703 | fsparam_flag ("nogrpid", Opt_nogrpid), | |
1704 | fsparam_flag ("sysvgroups", Opt_nogrpid), | |
1705 | fsparam_u32 ("resgid", Opt_resgid), | |
1706 | fsparam_u32 ("resuid", Opt_resuid), | |
1707 | fsparam_u32 ("sb", Opt_sb), | |
1708 | fsparam_enum ("errors", Opt_errors, ext4_param_errors), | |
1709 | fsparam_flag ("nouid32", Opt_nouid32), | |
1710 | fsparam_flag ("debug", Opt_debug), | |
1711 | fsparam_flag ("oldalloc", Opt_removed), | |
1712 | fsparam_flag ("orlov", Opt_removed), | |
1713 | fsparam_flag ("user_xattr", Opt_user_xattr), | |
e5a185c2 | 1714 | fsparam_flag ("acl", Opt_acl), |
e5a185c2 LC |
1715 | fsparam_flag ("norecovery", Opt_noload), |
1716 | fsparam_flag ("noload", Opt_noload), | |
1717 | fsparam_flag ("bh", Opt_removed), | |
1718 | fsparam_flag ("nobh", Opt_removed), | |
1719 | fsparam_u32 ("commit", Opt_commit), | |
1720 | fsparam_u32 ("min_batch_time", Opt_min_batch_time), | |
1721 | fsparam_u32 ("max_batch_time", Opt_max_batch_time), | |
1722 | fsparam_u32 ("journal_dev", Opt_journal_dev), | |
1723 | fsparam_bdev ("journal_path", Opt_journal_path), | |
1724 | fsparam_flag ("journal_checksum", Opt_journal_checksum), | |
1725 | fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), | |
1726 | fsparam_flag ("journal_async_commit",Opt_journal_async_commit), | |
1727 | fsparam_flag ("abort", Opt_abort), | |
1728 | fsparam_enum ("data", Opt_data, ext4_param_data), | |
1729 | fsparam_enum ("data_err", Opt_data_err, | |
1730 | ext4_param_data_err), | |
1731 | fsparam_string_empty | |
1732 | ("usrjquota", Opt_usrjquota), | |
1733 | fsparam_string_empty | |
1734 | ("grpjquota", Opt_grpjquota), | |
1735 | fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), | |
1736 | fsparam_flag ("grpquota", Opt_grpquota), | |
1737 | fsparam_flag ("quota", Opt_quota), | |
1738 | fsparam_flag ("noquota", Opt_noquota), | |
1739 | fsparam_flag ("usrquota", Opt_usrquota), | |
1740 | fsparam_flag ("prjquota", Opt_prjquota), | |
1741 | fsparam_flag ("barrier", Opt_barrier), | |
1742 | fsparam_u32 ("barrier", Opt_barrier), | |
1743 | fsparam_flag ("nobarrier", Opt_nobarrier), | |
1ff20307 | 1744 | fsparam_flag ("i_version", Opt_removed), |
e5a185c2 LC |
1745 | fsparam_flag ("dax", Opt_dax), |
1746 | fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), | |
1747 | fsparam_u32 ("stripe", Opt_stripe), | |
1748 | fsparam_flag ("delalloc", Opt_delalloc), | |
1749 | fsparam_flag ("nodelalloc", Opt_nodelalloc), | |
1750 | fsparam_flag ("warn_on_error", Opt_warn_on_error), | |
1751 | fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), | |
e5a185c2 LC |
1752 | fsparam_u32 ("debug_want_extra_isize", |
1753 | Opt_debug_want_extra_isize), | |
1754 | fsparam_flag ("mblk_io_submit", Opt_removed), | |
1755 | fsparam_flag ("nomblk_io_submit", Opt_removed), | |
1756 | fsparam_flag ("block_validity", Opt_block_validity), | |
1757 | fsparam_flag ("noblock_validity", Opt_noblock_validity), | |
1758 | fsparam_u32 ("inode_readahead_blks", | |
1759 | Opt_inode_readahead_blks), | |
1760 | fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), | |
1761 | fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), | |
1762 | fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), | |
1763 | fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), | |
1764 | fsparam_flag ("dioread_nolock", Opt_dioread_nolock), | |
1765 | fsparam_flag ("nodioread_nolock", Opt_dioread_lock), | |
1766 | fsparam_flag ("dioread_lock", Opt_dioread_lock), | |
1767 | fsparam_flag ("discard", Opt_discard), | |
1768 | fsparam_flag ("nodiscard", Opt_nodiscard), | |
1769 | fsparam_u32 ("init_itable", Opt_init_itable), | |
1770 | fsparam_flag ("init_itable", Opt_init_itable), | |
1771 | fsparam_flag ("noinit_itable", Opt_noinit_itable), | |
1772 | #ifdef CONFIG_EXT4_DEBUG | |
1773 | fsparam_flag ("fc_debug_force", Opt_fc_debug_force), | |
1774 | fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), | |
1775 | #endif | |
1776 | fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), | |
1777 | fsparam_flag ("test_dummy_encryption", | |
1778 | Opt_test_dummy_encryption), | |
1779 | fsparam_string ("test_dummy_encryption", | |
1780 | Opt_test_dummy_encryption), | |
1781 | fsparam_flag ("inlinecrypt", Opt_inlinecrypt), | |
1782 | fsparam_flag ("nombcache", Opt_nombcache), | |
1783 | fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ | |
1784 | fsparam_flag ("prefetch_block_bitmaps", | |
1785 | Opt_removed), | |
1786 | fsparam_flag ("no_prefetch_block_bitmaps", | |
1787 | Opt_no_prefetch_block_bitmaps), | |
1788 | fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), | |
1789 | fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ | |
1790 | fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ | |
1791 | fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ | |
1792 | fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ | |
1793 | fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ | |
1794 | {} | |
1795 | }; | |
1796 | ||
b3881f74 | 1797 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
196e402a | 1798 | |
26092bf5 TT |
1799 | #define MOPT_SET 0x0001 |
1800 | #define MOPT_CLEAR 0x0002 | |
1801 | #define MOPT_NOSUPPORT 0x0004 | |
1802 | #define MOPT_EXPLICIT 0x0008 | |
ac27a0ec | 1803 | #ifdef CONFIG_QUOTA |
26092bf5 | 1804 | #define MOPT_Q 0 |
ba2e524d | 1805 | #define MOPT_QFMT 0x0010 |
26092bf5 TT |
1806 | #else |
1807 | #define MOPT_Q MOPT_NOSUPPORT | |
1808 | #define MOPT_QFMT MOPT_NOSUPPORT | |
ac27a0ec | 1809 | #endif |
ba2e524d LC |
1810 | #define MOPT_NO_EXT2 0x0020 |
1811 | #define MOPT_NO_EXT3 0x0040 | |
8dc0aa8c | 1812 | #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) |
ba2e524d LC |
1813 | #define MOPT_SKIP 0x0080 |
1814 | #define MOPT_2 0x0100 | |
26092bf5 TT |
1815 | |
1816 | static const struct mount_opts { | |
1817 | int token; | |
1818 | int mount_opt; | |
1819 | int flags; | |
1820 | } ext4_mount_opts[] = { | |
1821 | {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, | |
1822 | {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, | |
1823 | {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, | |
1824 | {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, | |
26092bf5 TT |
1825 | {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, |
1826 | {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, | |
8dc0aa8c TT |
1827 | {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, |
1828 | MOPT_EXT4_ONLY | MOPT_SET}, | |
1829 | {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, | |
1830 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
26092bf5 TT |
1831 | {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, |
1832 | {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, | |
8dc0aa8c TT |
1833 | {Opt_delalloc, EXT4_MOUNT_DELALLOC, |
1834 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, | |
1835 | {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, | |
59d9fa5c | 1836 | MOPT_EXT4_ONLY | MOPT_CLEAR}, |
327eaf73 TT |
1837 | {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, |
1838 | {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, | |
cb8435dc | 1839 | {Opt_commit, 0, MOPT_NO_EXT2}, |
c6d3d56d DW |
1840 | {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1841 | MOPT_EXT4_ONLY | MOPT_CLEAR}, | |
8dc0aa8c | 1842 | {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, |
1e381f60 | 1843 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
26092bf5 | 1844 | {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | |
8dc0aa8c | 1845 | EXT4_MOUNT_JOURNAL_CHECKSUM), |
1e381f60 | 1846 | MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, |
8dc0aa8c | 1847 | {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, |
ba2e524d | 1848 | {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, |
26092bf5 TT |
1849 | {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, |
1850 | {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, | |
1851 | {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, | |
1852 | {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, | |
1853 | {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, | |
ba2e524d LC |
1854 | {Opt_dax_type, 0, MOPT_EXT4_ONLY}, |
1855 | {Opt_journal_dev, 0, MOPT_NO_EXT2}, | |
1856 | {Opt_journal_path, 0, MOPT_NO_EXT2}, | |
1857 | {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, | |
1858 | {Opt_data, 0, MOPT_NO_EXT2}, | |
26092bf5 | 1859 | {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, |
03010a33 | 1860 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
26092bf5 | 1861 | {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, |
ac27a0ec | 1862 | #else |
26092bf5 | 1863 | {Opt_acl, 0, MOPT_NOSUPPORT}, |
ac27a0ec | 1864 | #endif |
26092bf5 TT |
1865 | {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, |
1866 | {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, | |
1867 | {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, | |
1868 | {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, | |
1869 | MOPT_SET | MOPT_Q}, | |
1870 | {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, | |
1871 | MOPT_SET | MOPT_Q}, | |
49da9392 JK |
1872 | {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, |
1873 | MOPT_SET | MOPT_Q}, | |
26092bf5 | 1874 | {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
49da9392 JK |
1875 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), |
1876 | MOPT_CLEAR | MOPT_Q}, | |
ba2e524d LC |
1877 | {Opt_usrjquota, 0, MOPT_Q}, |
1878 | {Opt_grpjquota, 0, MOPT_Q}, | |
1879 | {Opt_jqfmt, 0, MOPT_QFMT}, | |
cdb7ee4c | 1880 | {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, |
21175ca4 | 1881 | {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, |
3d392b26 | 1882 | MOPT_SET}, |
99c880de | 1883 | #ifdef CONFIG_EXT4_DEBUG |
0f0672ff HS |
1884 | {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, |
1885 | MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, | |
8016e29f | 1886 | #endif |
26092bf5 TT |
1887 | {Opt_err, 0, 0} |
1888 | }; | |
1889 | ||
5298d4bf | 1890 | #if IS_ENABLED(CONFIG_UNICODE) |
c83ad55e GKB |
1891 | static const struct ext4_sb_encodings { |
1892 | __u16 magic; | |
1893 | char *name; | |
49bd03cc | 1894 | unsigned int version; |
c83ad55e | 1895 | } ext4_sb_encoding_map[] = { |
49bd03cc | 1896 | {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, |
c83ad55e GKB |
1897 | }; |
1898 | ||
aa8bf298 CH |
1899 | static const struct ext4_sb_encodings * |
1900 | ext4_sb_read_encoding(const struct ext4_super_block *es) | |
c83ad55e GKB |
1901 | { |
1902 | __u16 magic = le16_to_cpu(es->s_encoding); | |
1903 | int i; | |
1904 | ||
1905 | for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) | |
1906 | if (magic == ext4_sb_encoding_map[i].magic) | |
aa8bf298 | 1907 | return &ext4_sb_encoding_map[i]; |
c83ad55e | 1908 | |
aa8bf298 | 1909 | return NULL; |
c83ad55e GKB |
1910 | } |
1911 | #endif | |
1912 | ||
6e47a3cc LC |
1913 | #define EXT4_SPEC_JQUOTA (1 << 0) |
1914 | #define EXT4_SPEC_JQFMT (1 << 1) | |
1915 | #define EXT4_SPEC_DATAJ (1 << 2) | |
1916 | #define EXT4_SPEC_SB_BLOCK (1 << 3) | |
1917 | #define EXT4_SPEC_JOURNAL_DEV (1 << 4) | |
1918 | #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) | |
6e47a3cc LC |
1919 | #define EXT4_SPEC_s_want_extra_isize (1 << 7) |
1920 | #define EXT4_SPEC_s_max_batch_time (1 << 8) | |
1921 | #define EXT4_SPEC_s_min_batch_time (1 << 9) | |
1922 | #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) | |
1923 | #define EXT4_SPEC_s_li_wait_mult (1 << 11) | |
1924 | #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) | |
1925 | #define EXT4_SPEC_s_stripe (1 << 13) | |
1926 | #define EXT4_SPEC_s_resuid (1 << 14) | |
1927 | #define EXT4_SPEC_s_resgid (1 << 15) | |
1928 | #define EXT4_SPEC_s_commit_interval (1 << 16) | |
1929 | #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) | |
7edfd85b | 1930 | #define EXT4_SPEC_s_sb_block (1 << 18) |
27b38686 | 1931 | #define EXT4_SPEC_mb_optimize_scan (1 << 19) |
6e47a3cc | 1932 | |
461c3af0 | 1933 | struct ext4_fs_context { |
e6e268cb | 1934 | char *s_qf_names[EXT4_MAXQUOTAS]; |
85456054 | 1935 | struct fscrypt_dummy_policy dummy_enc_policy; |
e6e268cb | 1936 | int s_jquota_fmt; /* Format of quota to use */ |
6e47a3cc LC |
1937 | #ifdef CONFIG_EXT4_DEBUG |
1938 | int s_fc_debug_max_replay; | |
1939 | #endif | |
e6e268cb | 1940 | unsigned short qname_spec; |
6e47a3cc LC |
1941 | unsigned long vals_s_flags; /* Bits to set in s_flags */ |
1942 | unsigned long mask_s_flags; /* Bits changed in s_flags */ | |
e6e268cb | 1943 | unsigned long journal_devnum; |
6e47a3cc LC |
1944 | unsigned long s_commit_interval; |
1945 | unsigned long s_stripe; | |
1946 | unsigned int s_inode_readahead_blks; | |
1947 | unsigned int s_want_extra_isize; | |
1948 | unsigned int s_li_wait_mult; | |
1949 | unsigned int s_max_dir_size_kb; | |
e6e268cb | 1950 | unsigned int journal_ioprio; |
6e47a3cc LC |
1951 | unsigned int vals_s_mount_opt; |
1952 | unsigned int mask_s_mount_opt; | |
1953 | unsigned int vals_s_mount_opt2; | |
1954 | unsigned int mask_s_mount_opt2; | |
e3952fcc LC |
1955 | unsigned long vals_s_mount_flags; |
1956 | unsigned long mask_s_mount_flags; | |
b6bd2435 | 1957 | unsigned int opt_flags; /* MOPT flags */ |
6e47a3cc LC |
1958 | unsigned int spec; |
1959 | u32 s_max_batch_time; | |
1960 | u32 s_min_batch_time; | |
1961 | kuid_t s_resuid; | |
1962 | kgid_t s_resgid; | |
7edfd85b | 1963 | ext4_fsblk_t s_sb_block; |
b237e304 HS |
1964 | }; |
1965 | ||
cebe85d5 LC |
1966 | static void ext4_fc_free(struct fs_context *fc) |
1967 | { | |
1968 | struct ext4_fs_context *ctx = fc->fs_private; | |
1969 | int i; | |
1970 | ||
1971 | if (!ctx) | |
1972 | return; | |
1973 | ||
1974 | for (i = 0; i < EXT4_MAXQUOTAS; i++) | |
1975 | kfree(ctx->s_qf_names[i]); | |
1976 | ||
85456054 | 1977 | fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); |
cebe85d5 LC |
1978 | kfree(ctx); |
1979 | } | |
1980 | ||
1981 | int ext4_init_fs_context(struct fs_context *fc) | |
1982 | { | |
da9e4802 | 1983 | struct ext4_fs_context *ctx; |
cebe85d5 LC |
1984 | |
1985 | ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); | |
1986 | if (!ctx) | |
1987 | return -ENOMEM; | |
1988 | ||
1989 | fc->fs_private = ctx; | |
1990 | fc->ops = &ext4_context_ops; | |
1991 | ||
1992 | return 0; | |
1993 | } | |
1994 | ||
e6e268cb LC |
1995 | #ifdef CONFIG_QUOTA |
1996 | /* | |
1997 | * Note the name of the specified quota file. | |
1998 | */ | |
1999 | static int note_qf_name(struct fs_context *fc, int qtype, | |
2000 | struct fs_parameter *param) | |
2001 | { | |
2002 | struct ext4_fs_context *ctx = fc->fs_private; | |
2003 | char *qname; | |
2004 | ||
2005 | if (param->size < 1) { | |
2006 | ext4_msg(NULL, KERN_ERR, "Missing quota name"); | |
2007 | return -EINVAL; | |
2008 | } | |
2009 | if (strchr(param->string, '/')) { | |
2010 | ext4_msg(NULL, KERN_ERR, | |
2011 | "quotafile must be on filesystem root"); | |
2012 | return -EINVAL; | |
2013 | } | |
2014 | if (ctx->s_qf_names[qtype]) { | |
2015 | if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { | |
2016 | ext4_msg(NULL, KERN_ERR, | |
2017 | "%s quota file already specified", | |
2018 | QTYPE2NAME(qtype)); | |
2019 | return -EINVAL; | |
2020 | } | |
2021 | return 0; | |
2022 | } | |
2023 | ||
2024 | qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); | |
2025 | if (!qname) { | |
2026 | ext4_msg(NULL, KERN_ERR, | |
2027 | "Not enough memory for storing quotafile name"); | |
2028 | return -ENOMEM; | |
2029 | } | |
2030 | ctx->s_qf_names[qtype] = qname; | |
2031 | ctx->qname_spec |= 1 << qtype; | |
6e47a3cc | 2032 | ctx->spec |= EXT4_SPEC_JQUOTA; |
e6e268cb LC |
2033 | return 0; |
2034 | } | |
2035 | ||
2036 | /* | |
2037 | * Clear the name of the specified quota file. | |
2038 | */ | |
2039 | static int unnote_qf_name(struct fs_context *fc, int qtype) | |
2040 | { | |
2041 | struct ext4_fs_context *ctx = fc->fs_private; | |
2042 | ||
2043 | if (ctx->s_qf_names[qtype]) | |
2044 | kfree(ctx->s_qf_names[qtype]); | |
2045 | ||
2046 | ctx->s_qf_names[qtype] = NULL; | |
2047 | ctx->qname_spec |= 1 << qtype; | |
6e47a3cc | 2048 | ctx->spec |= EXT4_SPEC_JQUOTA; |
e6e268cb LC |
2049 | return 0; |
2050 | } | |
2051 | #endif | |
2052 | ||
85456054 EB |
2053 | static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, |
2054 | struct ext4_fs_context *ctx) | |
2055 | { | |
2056 | int err; | |
2057 | ||
2058 | if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { | |
2059 | ext4_msg(NULL, KERN_WARNING, | |
2060 | "test_dummy_encryption option not supported"); | |
2061 | return -EINVAL; | |
2062 | } | |
2063 | err = fscrypt_parse_test_dummy_encryption(param, | |
2064 | &ctx->dummy_enc_policy); | |
2065 | if (err == -EINVAL) { | |
2066 | ext4_msg(NULL, KERN_WARNING, | |
2067 | "Value of option \"%s\" is unrecognized", param->key); | |
2068 | } else if (err == -EEXIST) { | |
2069 | ext4_msg(NULL, KERN_WARNING, | |
2070 | "Conflicting test_dummy_encryption options"); | |
2071 | return -EINVAL; | |
2072 | } | |
2073 | return err; | |
2074 | } | |
2075 | ||
6e47a3cc | 2076 | #define EXT4_SET_CTX(name) \ |
4c246728 LC |
2077 | static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ |
2078 | unsigned long flag) \ | |
6e47a3cc LC |
2079 | { \ |
2080 | ctx->mask_s_##name |= flag; \ | |
2081 | ctx->vals_s_##name |= flag; \ | |
e3952fcc LC |
2082 | } |
2083 | ||
2084 | #define EXT4_CLEAR_CTX(name) \ | |
4c246728 LC |
2085 | static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ |
2086 | unsigned long flag) \ | |
6e47a3cc LC |
2087 | { \ |
2088 | ctx->mask_s_##name |= flag; \ | |
2089 | ctx->vals_s_##name &= ~flag; \ | |
e3952fcc LC |
2090 | } |
2091 | ||
2092 | #define EXT4_TEST_CTX(name) \ | |
4c246728 LC |
2093 | static inline unsigned long \ |
2094 | ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ | |
6e47a3cc | 2095 | { \ |
4c246728 | 2096 | return (ctx->vals_s_##name & flag); \ |
e3952fcc | 2097 | } |
6e47a3cc | 2098 | |
e3952fcc | 2099 | EXT4_SET_CTX(flags); /* set only */ |
6e47a3cc | 2100 | EXT4_SET_CTX(mount_opt); |
e3952fcc LC |
2101 | EXT4_CLEAR_CTX(mount_opt); |
2102 | EXT4_TEST_CTX(mount_opt); | |
6e47a3cc | 2103 | EXT4_SET_CTX(mount_opt2); |
e3952fcc LC |
2104 | EXT4_CLEAR_CTX(mount_opt2); |
2105 | EXT4_TEST_CTX(mount_opt2); | |
2106 | ||
2107 | static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) | |
2108 | { | |
2109 | set_bit(bit, &ctx->mask_s_mount_flags); | |
2110 | set_bit(bit, &ctx->vals_s_mount_flags); | |
2111 | } | |
6e47a3cc | 2112 | |
02f960f8 | 2113 | static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) |
26092bf5 | 2114 | { |
461c3af0 | 2115 | struct ext4_fs_context *ctx = fc->fs_private; |
461c3af0 | 2116 | struct fs_parse_result result; |
26092bf5 | 2117 | const struct mount_opts *m; |
461c3af0 | 2118 | int is_remount; |
08cefc7a EB |
2119 | kuid_t uid; |
2120 | kgid_t gid; | |
461c3af0 LC |
2121 | int token; |
2122 | ||
2123 | token = fs_parse(fc, ext4_param_specs, param, &result); | |
2124 | if (token < 0) | |
2125 | return token; | |
2126 | is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; | |
26092bf5 | 2127 | |
ba2e524d LC |
2128 | for (m = ext4_mount_opts; m->token != Opt_err; m++) |
2129 | if (token == m->token) | |
2130 | break; | |
2131 | ||
2132 | ctx->opt_flags |= m->flags; | |
2133 | ||
2134 | if (m->flags & MOPT_EXPLICIT) { | |
2135 | if (m->mount_opt & EXT4_MOUNT_DELALLOC) { | |
2136 | ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); | |
2137 | } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { | |
2138 | ctx_set_mount_opt2(ctx, | |
2139 | EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); | |
2140 | } else | |
2141 | return -EINVAL; | |
2142 | } | |
2143 | ||
2144 | if (m->flags & MOPT_NOSUPPORT) { | |
2145 | ext4_msg(NULL, KERN_ERR, "%s option not supported", | |
2146 | param->key); | |
2147 | return 0; | |
2148 | } | |
2149 | ||
2150 | switch (token) { | |
57f73c2c | 2151 | #ifdef CONFIG_QUOTA |
ba2e524d | 2152 | case Opt_usrjquota: |
461c3af0 | 2153 | if (!*param->string) |
e6e268cb | 2154 | return unnote_qf_name(fc, USRQUOTA); |
461c3af0 | 2155 | else |
e6e268cb | 2156 | return note_qf_name(fc, USRQUOTA, param); |
ba2e524d | 2157 | case Opt_grpjquota: |
461c3af0 | 2158 | if (!*param->string) |
e6e268cb | 2159 | return unnote_qf_name(fc, GRPQUOTA); |
461c3af0 | 2160 | else |
e6e268cb | 2161 | return note_qf_name(fc, GRPQUOTA, param); |
57f73c2c | 2162 | #endif |
26092bf5 | 2163 | case Opt_sb: |
7edfd85b LC |
2164 | if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { |
2165 | ext4_msg(NULL, KERN_WARNING, | |
2166 | "Ignoring %s option on remount", param->key); | |
2167 | } else { | |
2168 | ctx->s_sb_block = result.uint_32; | |
2169 | ctx->spec |= EXT4_SPEC_s_sb_block; | |
2170 | } | |
02f960f8 | 2171 | return 0; |
26092bf5 | 2172 | case Opt_removed: |
da812f61 | 2173 | ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", |
461c3af0 | 2174 | param->key); |
02f960f8 | 2175 | return 0; |
26092bf5 | 2176 | case Opt_abort: |
e3952fcc | 2177 | ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); |
02f960f8 | 2178 | return 0; |
4f74d15f EB |
2179 | case Opt_inlinecrypt: |
2180 | #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT | |
6e47a3cc | 2181 | ctx_set_flags(ctx, SB_INLINECRYPT); |
4f74d15f | 2182 | #else |
da812f61 | 2183 | ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); |
4f74d15f | 2184 | #endif |
02f960f8 | 2185 | return 0; |
461c3af0 | 2186 | case Opt_errors: |
6e47a3cc | 2187 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); |
ba2e524d LC |
2188 | ctx_set_mount_opt(ctx, result.uint_32); |
2189 | return 0; | |
2190 | #ifdef CONFIG_QUOTA | |
2191 | case Opt_jqfmt: | |
2192 | ctx->s_jquota_fmt = result.uint_32; | |
2193 | ctx->spec |= EXT4_SPEC_JQFMT; | |
2194 | return 0; | |
2195 | #endif | |
2196 | case Opt_data: | |
2197 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); | |
2198 | ctx_set_mount_opt(ctx, result.uint_32); | |
2199 | ctx->spec |= EXT4_SPEC_DATAJ; | |
2200 | return 0; | |
2201 | case Opt_commit: | |
461c3af0 | 2202 | if (result.uint_32 == 0) |
934b0de1 | 2203 | result.uint_32 = JBD2_DEFAULT_MAX_COMMIT_AGE; |
461c3af0 | 2204 | else if (result.uint_32 > INT_MAX / HZ) { |
da812f61 | 2205 | ext4_msg(NULL, KERN_ERR, |
9ba55543 | 2206 | "Invalid commit interval %d, " |
2207 | "must be smaller than %d", | |
461c3af0 | 2208 | result.uint_32, INT_MAX / HZ); |
da812f61 | 2209 | return -EINVAL; |
9ba55543 | 2210 | } |
6e47a3cc LC |
2211 | ctx->s_commit_interval = HZ * result.uint_32; |
2212 | ctx->spec |= EXT4_SPEC_s_commit_interval; | |
ba2e524d LC |
2213 | return 0; |
2214 | case Opt_debug_want_extra_isize: | |
6e47a3cc | 2215 | if ((result.uint_32 & 1) || (result.uint_32 < 4)) { |
da812f61 | 2216 | ext4_msg(NULL, KERN_ERR, |
461c3af0 | 2217 | "Invalid want_extra_isize %d", result.uint_32); |
da812f61 | 2218 | return -EINVAL; |
9803387c | 2219 | } |
6e47a3cc LC |
2220 | ctx->s_want_extra_isize = result.uint_32; |
2221 | ctx->spec |= EXT4_SPEC_s_want_extra_isize; | |
ba2e524d LC |
2222 | return 0; |
2223 | case Opt_max_batch_time: | |
6e47a3cc LC |
2224 | ctx->s_max_batch_time = result.uint_32; |
2225 | ctx->spec |= EXT4_SPEC_s_max_batch_time; | |
ba2e524d LC |
2226 | return 0; |
2227 | case Opt_min_batch_time: | |
6e47a3cc LC |
2228 | ctx->s_min_batch_time = result.uint_32; |
2229 | ctx->spec |= EXT4_SPEC_s_min_batch_time; | |
ba2e524d LC |
2230 | return 0; |
2231 | case Opt_inode_readahead_blks: | |
461c3af0 LC |
2232 | if (result.uint_32 && |
2233 | (result.uint_32 > (1 << 30) || | |
2234 | !is_power_of_2(result.uint_32))) { | |
da812f61 | 2235 | ext4_msg(NULL, KERN_ERR, |
e33e60ea JK |
2236 | "EXT4-fs: inode_readahead_blks must be " |
2237 | "0 or a power of 2 smaller than 2^31"); | |
da812f61 | 2238 | return -EINVAL; |
5f3633e3 | 2239 | } |
6e47a3cc LC |
2240 | ctx->s_inode_readahead_blks = result.uint_32; |
2241 | ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; | |
ba2e524d LC |
2242 | return 0; |
2243 | case Opt_init_itable: | |
6e47a3cc LC |
2244 | ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); |
2245 | ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
461c3af0 | 2246 | if (param->type == fs_value_is_string) |
6e47a3cc LC |
2247 | ctx->s_li_wait_mult = result.uint_32; |
2248 | ctx->spec |= EXT4_SPEC_s_li_wait_mult; | |
ba2e524d LC |
2249 | return 0; |
2250 | case Opt_max_dir_size_kb: | |
6e47a3cc LC |
2251 | ctx->s_max_dir_size_kb = result.uint_32; |
2252 | ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; | |
ba2e524d | 2253 | return 0; |
8016e29f | 2254 | #ifdef CONFIG_EXT4_DEBUG |
ba2e524d | 2255 | case Opt_fc_debug_max_replay: |
6e47a3cc LC |
2256 | ctx->s_fc_debug_max_replay = result.uint_32; |
2257 | ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; | |
ba2e524d | 2258 | return 0; |
8016e29f | 2259 | #endif |
ba2e524d | 2260 | case Opt_stripe: |
6e47a3cc LC |
2261 | ctx->s_stripe = result.uint_32; |
2262 | ctx->spec |= EXT4_SPEC_s_stripe; | |
ba2e524d LC |
2263 | return 0; |
2264 | case Opt_resuid: | |
461c3af0 | 2265 | uid = make_kuid(current_user_ns(), result.uint_32); |
5f3633e3 | 2266 | if (!uid_valid(uid)) { |
da812f61 | 2267 | ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", |
461c3af0 | 2268 | result.uint_32); |
da812f61 | 2269 | return -EINVAL; |
26092bf5 | 2270 | } |
6e47a3cc LC |
2271 | ctx->s_resuid = uid; |
2272 | ctx->spec |= EXT4_SPEC_s_resuid; | |
ba2e524d LC |
2273 | return 0; |
2274 | case Opt_resgid: | |
461c3af0 | 2275 | gid = make_kgid(current_user_ns(), result.uint_32); |
5f3633e3 | 2276 | if (!gid_valid(gid)) { |
da812f61 | 2277 | ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", |
461c3af0 | 2278 | result.uint_32); |
da812f61 | 2279 | return -EINVAL; |
5f3633e3 | 2280 | } |
6e47a3cc LC |
2281 | ctx->s_resgid = gid; |
2282 | ctx->spec |= EXT4_SPEC_s_resgid; | |
ba2e524d LC |
2283 | return 0; |
2284 | case Opt_journal_dev: | |
5f3633e3 | 2285 | if (is_remount) { |
da812f61 | 2286 | ext4_msg(NULL, KERN_ERR, |
5f3633e3 | 2287 | "Cannot specify journal on remount"); |
da812f61 | 2288 | return -EINVAL; |
5f3633e3 | 2289 | } |
461c3af0 | 2290 | ctx->journal_devnum = result.uint_32; |
6e47a3cc | 2291 | ctx->spec |= EXT4_SPEC_JOURNAL_DEV; |
ba2e524d LC |
2292 | return 0; |
2293 | case Opt_journal_path: | |
2294 | { | |
ad4eec61 ES |
2295 | struct inode *journal_inode; |
2296 | struct path path; | |
2297 | int error; | |
2298 | ||
2299 | if (is_remount) { | |
da812f61 | 2300 | ext4_msg(NULL, KERN_ERR, |
ad4eec61 | 2301 | "Cannot specify journal on remount"); |
da812f61 | 2302 | return -EINVAL; |
ad4eec61 | 2303 | } |
ad4eec61 | 2304 | |
e3ea75ee | 2305 | error = fs_lookup_param(fc, param, 1, LOOKUP_FOLLOW, &path); |
ad4eec61 | 2306 | if (error) { |
da812f61 | 2307 | ext4_msg(NULL, KERN_ERR, "error: could not find " |
461c3af0 | 2308 | "journal device path"); |
da812f61 | 2309 | return -EINVAL; |
ad4eec61 ES |
2310 | } |
2311 | ||
2b0143b5 | 2312 | journal_inode = d_inode(path.dentry); |
461c3af0 | 2313 | ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); |
6e47a3cc | 2314 | ctx->spec |= EXT4_SPEC_JOURNAL_DEV; |
ad4eec61 | 2315 | path_put(&path); |
ba2e524d LC |
2316 | return 0; |
2317 | } | |
2318 | case Opt_journal_ioprio: | |
461c3af0 | 2319 | if (result.uint_32 > 7) { |
da812f61 | 2320 | ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" |
5f3633e3 | 2321 | " (must be 0-7)"); |
da812f61 | 2322 | return -EINVAL; |
5f3633e3 | 2323 | } |
461c3af0 LC |
2324 | ctx->journal_ioprio = |
2325 | IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); | |
6e47a3cc | 2326 | ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; |
ba2e524d LC |
2327 | return 0; |
2328 | case Opt_test_dummy_encryption: | |
85456054 | 2329 | return ext4_parse_test_dummy_encryption(param, ctx); |
ba2e524d LC |
2330 | case Opt_dax: |
2331 | case Opt_dax_type: | |
ef83b6e8 | 2332 | #ifdef CONFIG_FS_DAX |
ba2e524d LC |
2333 | { |
2334 | int type = (token == Opt_dax) ? | |
2335 | Opt_dax : result.uint_32; | |
2336 | ||
2337 | switch (type) { | |
9cb20f94 IW |
2338 | case Opt_dax: |
2339 | case Opt_dax_always: | |
ba2e524d | 2340 | ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); |
6e47a3cc | 2341 | ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); |
9cb20f94 IW |
2342 | break; |
2343 | case Opt_dax_never: | |
ba2e524d | 2344 | ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); |
6e47a3cc | 2345 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); |
9cb20f94 IW |
2346 | break; |
2347 | case Opt_dax_inode: | |
6e47a3cc LC |
2348 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); |
2349 | ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); | |
9cb20f94 | 2350 | /* Strictly for printing options */ |
ba2e524d | 2351 | ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); |
9cb20f94 IW |
2352 | break; |
2353 | } | |
ba2e524d LC |
2354 | return 0; |
2355 | } | |
ef83b6e8 | 2356 | #else |
da812f61 | 2357 | ext4_msg(NULL, KERN_INFO, "dax option not supported"); |
da812f61 | 2358 | return -EINVAL; |
5f3633e3 | 2359 | #endif |
ba2e524d LC |
2360 | case Opt_data_err: |
2361 | if (result.uint_32 == Opt_data_err_abort) | |
2362 | ctx_set_mount_opt(ctx, m->mount_opt); | |
2363 | else if (result.uint_32 == Opt_data_err_ignore) | |
2364 | ctx_clear_mount_opt(ctx, m->mount_opt); | |
2365 | return 0; | |
2366 | case Opt_mb_optimize_scan: | |
27b38686 OM |
2367 | if (result.int_32 == 1) { |
2368 | ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); | |
2369 | ctx->spec |= EXT4_SPEC_mb_optimize_scan; | |
2370 | } else if (result.int_32 == 0) { | |
2371 | ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); | |
2372 | ctx->spec |= EXT4_SPEC_mb_optimize_scan; | |
2373 | } else { | |
da812f61 | 2374 | ext4_msg(NULL, KERN_WARNING, |
196e402a | 2375 | "mb_optimize_scan should be set to 0 or 1."); |
da812f61 | 2376 | return -EINVAL; |
196e402a | 2377 | } |
ba2e524d LC |
2378 | return 0; |
2379 | } | |
2380 | ||
2381 | /* | |
2382 | * At this point we should only be getting options requiring MOPT_SET, | |
2383 | * or MOPT_CLEAR. Anything else is a bug | |
2384 | */ | |
2385 | if (m->token == Opt_err) { | |
2386 | ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", | |
2387 | param->key); | |
2388 | WARN_ON(1); | |
2389 | return -EINVAL; | |
2390 | } | |
2391 | ||
2392 | else { | |
461c3af0 LC |
2393 | unsigned int set = 0; |
2394 | ||
2395 | if ((param->type == fs_value_is_flag) || | |
2396 | result.uint_32 > 0) | |
2397 | set = 1; | |
2398 | ||
5f3633e3 | 2399 | if (m->flags & MOPT_CLEAR) |
461c3af0 | 2400 | set = !set; |
5f3633e3 | 2401 | else if (unlikely(!(m->flags & MOPT_SET))) { |
da812f61 | 2402 | ext4_msg(NULL, KERN_WARNING, |
461c3af0 LC |
2403 | "buggy handling of option %s", |
2404 | param->key); | |
5f3633e3 | 2405 | WARN_ON(1); |
da812f61 | 2406 | return -EINVAL; |
5f3633e3 | 2407 | } |
995a3ed6 | 2408 | if (m->flags & MOPT_2) { |
461c3af0 | 2409 | if (set != 0) |
6e47a3cc | 2410 | ctx_set_mount_opt2(ctx, m->mount_opt); |
995a3ed6 | 2411 | else |
6e47a3cc | 2412 | ctx_clear_mount_opt2(ctx, m->mount_opt); |
995a3ed6 | 2413 | } else { |
461c3af0 | 2414 | if (set != 0) |
6e47a3cc | 2415 | ctx_set_mount_opt(ctx, m->mount_opt); |
995a3ed6 | 2416 | else |
6e47a3cc | 2417 | ctx_clear_mount_opt(ctx, m->mount_opt); |
995a3ed6 | 2418 | } |
26092bf5 | 2419 | } |
ba2e524d | 2420 | |
02f960f8 | 2421 | return 0; |
26092bf5 TT |
2422 | } |
2423 | ||
7edfd85b | 2424 | static int parse_options(struct fs_context *fc, char *options) |
26092bf5 | 2425 | { |
461c3af0 | 2426 | struct fs_parameter param; |
461c3af0 LC |
2427 | int ret; |
2428 | char *key; | |
26092bf5 TT |
2429 | |
2430 | if (!options) | |
7edfd85b | 2431 | return 0; |
461c3af0 LC |
2432 | |
2433 | while ((key = strsep(&options, ",")) != NULL) { | |
2434 | if (*key) { | |
2435 | size_t v_len = 0; | |
2436 | char *value = strchr(key, '='); | |
2437 | ||
2438 | param.type = fs_value_is_flag; | |
2439 | param.string = NULL; | |
2440 | ||
2441 | if (value) { | |
2442 | if (value == key) | |
2443 | continue; | |
2444 | ||
2445 | *value++ = 0; | |
2446 | v_len = strlen(value); | |
2447 | param.string = kmemdup_nul(value, v_len, | |
2448 | GFP_KERNEL); | |
2449 | if (!param.string) | |
7edfd85b | 2450 | return -ENOMEM; |
461c3af0 LC |
2451 | param.type = fs_value_is_string; |
2452 | } | |
2453 | ||
2454 | param.key = key; | |
2455 | param.size = v_len; | |
2456 | ||
02f960f8 | 2457 | ret = ext4_parse_param(fc, ¶m); |
461c3af0 LC |
2458 | if (param.string) |
2459 | kfree(param.string); | |
2460 | if (ret < 0) | |
7edfd85b | 2461 | return ret; |
461c3af0 | 2462 | } |
ac27a0ec | 2463 | } |
461c3af0 | 2464 | |
7edfd85b | 2465 | ret = ext4_validate_options(fc); |
da812f61 | 2466 | if (ret < 0) |
7edfd85b | 2467 | return ret; |
da812f61 | 2468 | |
7edfd85b LC |
2469 | return 0; |
2470 | } | |
2471 | ||
2472 | static int parse_apply_sb_mount_options(struct super_block *sb, | |
2473 | struct ext4_fs_context *m_ctx) | |
2474 | { | |
2475 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2476 | char *s_mount_opts = NULL; | |
2477 | struct ext4_fs_context *s_ctx = NULL; | |
2478 | struct fs_context *fc = NULL; | |
2479 | int ret = -ENOMEM; | |
2480 | ||
2481 | if (!sbi->s_es->s_mount_opts[0]) | |
e6e268cb LC |
2482 | return 0; |
2483 | ||
7edfd85b LC |
2484 | s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, |
2485 | sizeof(sbi->s_es->s_mount_opts), | |
2486 | GFP_KERNEL); | |
2487 | if (!s_mount_opts) | |
2488 | return ret; | |
2489 | ||
2490 | fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); | |
2491 | if (!fc) | |
2492 | goto out_free; | |
2493 | ||
2494 | s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); | |
2495 | if (!s_ctx) | |
2496 | goto out_free; | |
2497 | ||
2498 | fc->fs_private = s_ctx; | |
2499 | fc->s_fs_info = sbi; | |
2500 | ||
2501 | ret = parse_options(fc, s_mount_opts); | |
6e47a3cc | 2502 | if (ret < 0) |
7edfd85b | 2503 | goto parse_failed; |
e6e268cb | 2504 | |
7edfd85b LC |
2505 | ret = ext4_check_opt_consistency(fc, sb); |
2506 | if (ret < 0) { | |
2507 | parse_failed: | |
2508 | ext4_msg(sb, KERN_WARNING, | |
2509 | "failed to parse options in superblock: %s", | |
2510 | s_mount_opts); | |
2511 | ret = 0; | |
2512 | goto out_free; | |
2513 | } | |
2514 | ||
2515 | if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) | |
2516 | m_ctx->journal_devnum = s_ctx->journal_devnum; | |
2517 | if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) | |
2518 | m_ctx->journal_ioprio = s_ctx->journal_ioprio; | |
2519 | ||
85456054 EB |
2520 | ext4_apply_options(fc, sb); |
2521 | ret = 0; | |
7edfd85b LC |
2522 | |
2523 | out_free: | |
c069db76 EB |
2524 | if (fc) { |
2525 | ext4_fc_free(fc); | |
2526 | kfree(fc); | |
2527 | } | |
7edfd85b LC |
2528 | kfree(s_mount_opts); |
2529 | return ret; | |
4c94bff9 LC |
2530 | } |
2531 | ||
e6e268cb LC |
2532 | static void ext4_apply_quota_options(struct fs_context *fc, |
2533 | struct super_block *sb) | |
2534 | { | |
2535 | #ifdef CONFIG_QUOTA | |
6e47a3cc | 2536 | bool quota_feature = ext4_has_feature_quota(sb); |
e6e268cb LC |
2537 | struct ext4_fs_context *ctx = fc->fs_private; |
2538 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2539 | char *qname; | |
2540 | int i; | |
2541 | ||
6e47a3cc LC |
2542 | if (quota_feature) |
2543 | return; | |
2544 | ||
2545 | if (ctx->spec & EXT4_SPEC_JQUOTA) { | |
2546 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { | |
2547 | if (!(ctx->qname_spec & (1 << i))) | |
2548 | continue; | |
2549 | ||
2550 | qname = ctx->s_qf_names[i]; /* May be NULL */ | |
4c1bd5a9 LC |
2551 | if (qname) |
2552 | set_opt(sb, QUOTA); | |
6e47a3cc | 2553 | ctx->s_qf_names[i] = NULL; |
13b215a9 LC |
2554 | qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, |
2555 | lockdep_is_held(&sb->s_umount)); | |
2556 | if (qname) | |
2557 | kfree_rcu(qname); | |
6e47a3cc | 2558 | } |
e6e268cb | 2559 | } |
6e47a3cc LC |
2560 | |
2561 | if (ctx->spec & EXT4_SPEC_JQFMT) | |
2562 | sbi->s_jquota_fmt = ctx->s_jquota_fmt; | |
e6e268cb LC |
2563 | #endif |
2564 | } | |
2565 | ||
2566 | /* | |
2567 | * Check quota settings consistency. | |
2568 | */ | |
2569 | static int ext4_check_quota_consistency(struct fs_context *fc, | |
2570 | struct super_block *sb) | |
2571 | { | |
2572 | #ifdef CONFIG_QUOTA | |
2573 | struct ext4_fs_context *ctx = fc->fs_private; | |
2574 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2575 | bool quota_feature = ext4_has_feature_quota(sb); | |
2576 | bool quota_loaded = sb_any_quota_loaded(sb); | |
6e47a3cc LC |
2577 | bool usr_qf_name, grp_qf_name, usrquota, grpquota; |
2578 | int quota_flags, i; | |
2579 | ||
2580 | /* | |
2581 | * We do the test below only for project quotas. 'usrquota' and | |
2582 | * 'grpquota' mount options are allowed even without quota feature | |
2583 | * to support legacy quotas in quota files. | |
2584 | */ | |
2585 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && | |
2586 | !ext4_has_feature_project(sb)) { | |
2587 | ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " | |
2588 | "Cannot enable project quota enforcement."); | |
2589 | return -EINVAL; | |
2590 | } | |
e6e268cb | 2591 | |
6e47a3cc LC |
2592 | quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | |
2593 | EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; | |
2594 | if (quota_loaded && | |
2595 | ctx->mask_s_mount_opt & quota_flags && | |
2596 | !ctx_test_mount_opt(ctx, quota_flags)) | |
2597 | goto err_quota_change; | |
2598 | ||
2599 | if (ctx->spec & EXT4_SPEC_JQUOTA) { | |
e6e268cb LC |
2600 | |
2601 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { | |
2602 | if (!(ctx->qname_spec & (1 << i))) | |
2603 | continue; | |
2604 | ||
6e47a3cc LC |
2605 | if (quota_loaded && |
2606 | !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) | |
e6e268cb LC |
2607 | goto err_jquota_change; |
2608 | ||
2609 | if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && | |
13b215a9 | 2610 | strcmp(get_qf_name(sb, sbi, i), |
e6e268cb LC |
2611 | ctx->s_qf_names[i]) != 0) |
2612 | goto err_jquota_specified; | |
2613 | } | |
6e47a3cc LC |
2614 | |
2615 | if (quota_feature) { | |
2616 | ext4_msg(NULL, KERN_INFO, | |
2617 | "Journaled quota options ignored when " | |
2618 | "QUOTA feature is enabled"); | |
2619 | return 0; | |
2620 | } | |
e6e268cb LC |
2621 | } |
2622 | ||
6e47a3cc | 2623 | if (ctx->spec & EXT4_SPEC_JQFMT) { |
e6e268cb | 2624 | if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) |
6e47a3cc | 2625 | goto err_jquota_change; |
e6e268cb LC |
2626 | if (quota_feature) { |
2627 | ext4_msg(NULL, KERN_INFO, "Quota format mount options " | |
2628 | "ignored when QUOTA feature is enabled"); | |
2629 | return 0; | |
2630 | } | |
2631 | } | |
6e47a3cc LC |
2632 | |
2633 | /* Make sure we don't mix old and new quota format */ | |
2634 | usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || | |
2635 | ctx->s_qf_names[USRQUOTA]); | |
2636 | grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || | |
2637 | ctx->s_qf_names[GRPQUOTA]); | |
2638 | ||
2639 | usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || | |
2640 | test_opt(sb, USRQUOTA)); | |
2641 | ||
2642 | grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || | |
2643 | test_opt(sb, GRPQUOTA)); | |
2644 | ||
2645 | if (usr_qf_name) { | |
2646 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); | |
2647 | usrquota = false; | |
2648 | } | |
2649 | if (grp_qf_name) { | |
2650 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); | |
2651 | grpquota = false; | |
2652 | } | |
2653 | ||
2654 | if (usr_qf_name || grp_qf_name) { | |
2655 | if (usrquota || grpquota) { | |
2656 | ext4_msg(NULL, KERN_ERR, "old and new quota " | |
2657 | "format mixing"); | |
2658 | return -EINVAL; | |
2659 | } | |
2660 | ||
2661 | if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { | |
2662 | ext4_msg(NULL, KERN_ERR, "journaled quota format " | |
2663 | "not specified"); | |
2664 | return -EINVAL; | |
2665 | } | |
2666 | } | |
2667 | ||
e6e268cb LC |
2668 | return 0; |
2669 | ||
2670 | err_quota_change: | |
2671 | ext4_msg(NULL, KERN_ERR, | |
2672 | "Cannot change quota options when quota turned on"); | |
2673 | return -EINVAL; | |
2674 | err_jquota_change: | |
2675 | ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " | |
2676 | "options when quota turned on"); | |
2677 | return -EINVAL; | |
2678 | err_jquota_specified: | |
2679 | ext4_msg(NULL, KERN_ERR, "%s quota file already specified", | |
2680 | QTYPE2NAME(i)); | |
2681 | return -EINVAL; | |
e6e268cb LC |
2682 | #else |
2683 | return 0; | |
2684 | #endif | |
2685 | } | |
2686 | ||
5f41fdae EB |
2687 | static int ext4_check_test_dummy_encryption(const struct fs_context *fc, |
2688 | struct super_block *sb) | |
2689 | { | |
5f41fdae EB |
2690 | const struct ext4_fs_context *ctx = fc->fs_private; |
2691 | const struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2692 | ||
85456054 | 2693 | if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) |
5f41fdae EB |
2694 | return 0; |
2695 | ||
2696 | if (!ext4_has_feature_encrypt(sb)) { | |
2697 | ext4_msg(NULL, KERN_WARNING, | |
2698 | "test_dummy_encryption requires encrypt feature"); | |
2699 | return -EINVAL; | |
2700 | } | |
2701 | /* | |
2702 | * This mount option is just for testing, and it's not worthwhile to | |
2703 | * implement the extra complexity (e.g. RCU protection) that would be | |
2704 | * needed to allow it to be set or changed during remount. We do allow | |
2705 | * it to be specified during remount, but only if there is no change. | |
2706 | */ | |
85456054 EB |
2707 | if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { |
2708 | if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, | |
2709 | &ctx->dummy_enc_policy)) | |
2710 | return 0; | |
5f41fdae | 2711 | ext4_msg(NULL, KERN_WARNING, |
85456054 | 2712 | "Can't set or change test_dummy_encryption on remount"); |
5f41fdae EB |
2713 | return -EINVAL; |
2714 | } | |
85456054 EB |
2715 | /* Also make sure s_mount_opts didn't contain a conflicting value. */ |
2716 | if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { | |
2717 | if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, | |
2718 | &ctx->dummy_enc_policy)) | |
2719 | return 0; | |
2720 | ext4_msg(NULL, KERN_WARNING, | |
2721 | "Conflicting test_dummy_encryption options"); | |
2722 | return -EINVAL; | |
2723 | } | |
7959eb19 | 2724 | return 0; |
85456054 EB |
2725 | } |
2726 | ||
2727 | static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, | |
2728 | struct super_block *sb) | |
2729 | { | |
2730 | if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || | |
2731 | /* if already set, it was already verified to be the same */ | |
2732 | fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) | |
2733 | return; | |
2734 | EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; | |
2735 | memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); | |
2736 | ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); | |
5f41fdae EB |
2737 | } |
2738 | ||
b6bd2435 LC |
2739 | static int ext4_check_opt_consistency(struct fs_context *fc, |
2740 | struct super_block *sb) | |
2741 | { | |
2742 | struct ext4_fs_context *ctx = fc->fs_private; | |
6e47a3cc LC |
2743 | struct ext4_sb_info *sbi = fc->s_fs_info; |
2744 | int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; | |
5f41fdae | 2745 | int err; |
b6bd2435 LC |
2746 | |
2747 | if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { | |
2748 | ext4_msg(NULL, KERN_ERR, | |
2749 | "Mount option(s) incompatible with ext2"); | |
2750 | return -EINVAL; | |
2751 | } | |
2752 | if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { | |
2753 | ext4_msg(NULL, KERN_ERR, | |
2754 | "Mount option(s) incompatible with ext3"); | |
2755 | return -EINVAL; | |
2756 | } | |
2757 | ||
6e47a3cc LC |
2758 | if (ctx->s_want_extra_isize > |
2759 | (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { | |
2760 | ext4_msg(NULL, KERN_ERR, | |
2761 | "Invalid want_extra_isize %d", | |
2762 | ctx->s_want_extra_isize); | |
2763 | return -EINVAL; | |
2764 | } | |
2765 | ||
2766 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { | |
2767 | int blocksize = | |
2768 | BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); | |
2769 | if (blocksize < PAGE_SIZE) | |
2770 | ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " | |
2771 | "experimental mount option 'dioread_nolock' " | |
2772 | "for blocksize < PAGE_SIZE"); | |
2773 | } | |
2774 | ||
5f41fdae EB |
2775 | err = ext4_check_test_dummy_encryption(fc, sb); |
2776 | if (err) | |
2777 | return err; | |
6e47a3cc LC |
2778 | |
2779 | if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { | |
2780 | if (!sbi->s_journal) { | |
2781 | ext4_msg(NULL, KERN_WARNING, | |
2782 | "Remounting file system with no journal " | |
2783 | "so ignoring journalled data option"); | |
2784 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); | |
4c246728 LC |
2785 | } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != |
2786 | test_opt(sb, DATA_FLAGS)) { | |
6e47a3cc LC |
2787 | ext4_msg(NULL, KERN_ERR, "Cannot change data mode " |
2788 | "on remount"); | |
2789 | return -EINVAL; | |
2790 | } | |
2791 | } | |
2792 | ||
2793 | if (is_remount) { | |
2794 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && | |
2795 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
2796 | ext4_msg(NULL, KERN_ERR, "can't mount with " | |
2797 | "both data=journal and dax"); | |
2798 | return -EINVAL; | |
2799 | } | |
2800 | ||
2801 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && | |
2802 | (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || | |
2803 | (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { | |
2804 | fail_dax_change_remount: | |
2805 | ext4_msg(NULL, KERN_ERR, "can't change " | |
2806 | "dax mount option while remounting"); | |
2807 | return -EINVAL; | |
2808 | } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && | |
2809 | (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || | |
2810 | (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { | |
2811 | goto fail_dax_change_remount; | |
2812 | } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && | |
2813 | ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || | |
2814 | (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || | |
2815 | !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { | |
2816 | goto fail_dax_change_remount; | |
2817 | } | |
2818 | } | |
2819 | ||
b6bd2435 LC |
2820 | return ext4_check_quota_consistency(fc, sb); |
2821 | } | |
2822 | ||
85456054 | 2823 | static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) |
4c94bff9 | 2824 | { |
6e47a3cc | 2825 | struct ext4_fs_context *ctx = fc->fs_private; |
da812f61 | 2826 | struct ext4_sb_info *sbi = fc->s_fs_info; |
6e47a3cc LC |
2827 | |
2828 | sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; | |
2829 | sbi->s_mount_opt |= ctx->vals_s_mount_opt; | |
2830 | sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; | |
2831 | sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; | |
2832 | sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; | |
2833 | sbi->s_mount_flags |= ctx->vals_s_mount_flags; | |
2834 | sb->s_flags &= ~ctx->mask_s_flags; | |
2835 | sb->s_flags |= ctx->vals_s_flags; | |
2836 | ||
2837 | #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) | |
2838 | APPLY(s_commit_interval); | |
2839 | APPLY(s_stripe); | |
2840 | APPLY(s_max_batch_time); | |
2841 | APPLY(s_min_batch_time); | |
2842 | APPLY(s_want_extra_isize); | |
2843 | APPLY(s_inode_readahead_blks); | |
2844 | APPLY(s_max_dir_size_kb); | |
2845 | APPLY(s_li_wait_mult); | |
2846 | APPLY(s_resgid); | |
2847 | APPLY(s_resuid); | |
2848 | ||
2849 | #ifdef CONFIG_EXT4_DEBUG | |
2850 | APPLY(s_fc_debug_max_replay); | |
2851 | #endif | |
2852 | ||
2853 | ext4_apply_quota_options(fc, sb); | |
85456054 | 2854 | ext4_apply_test_dummy_encryption(ctx, sb); |
6e47a3cc LC |
2855 | } |
2856 | ||
2857 | ||
2858 | static int ext4_validate_options(struct fs_context *fc) | |
2859 | { | |
ac27a0ec | 2860 | #ifdef CONFIG_QUOTA |
6e47a3cc | 2861 | struct ext4_fs_context *ctx = fc->fs_private; |
4c94bff9 | 2862 | char *usr_qf_name, *grp_qf_name; |
6e47a3cc LC |
2863 | |
2864 | usr_qf_name = ctx->s_qf_names[USRQUOTA]; | |
2865 | grp_qf_name = ctx->s_qf_names[GRPQUOTA]; | |
2866 | ||
33458eab | 2867 | if (usr_qf_name || grp_qf_name) { |
6e47a3cc LC |
2868 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) |
2869 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); | |
ac27a0ec | 2870 | |
6e47a3cc LC |
2871 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) |
2872 | ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); | |
ac27a0ec | 2873 | |
6e47a3cc LC |
2874 | if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || |
2875 | ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { | |
da812f61 | 2876 | ext4_msg(NULL, KERN_ERR, "old and new quota " |
6e47a3cc | 2877 | "format mixing"); |
da812f61 | 2878 | return -EINVAL; |
ac27a0ec | 2879 | } |
ac27a0ec DK |
2880 | } |
2881 | #endif | |
6e47a3cc | 2882 | return 1; |
ac27a0ec DK |
2883 | } |
2884 | ||
2adf6da8 TT |
2885 | static inline void ext4_show_quota_options(struct seq_file *seq, |
2886 | struct super_block *sb) | |
2887 | { | |
2888 | #if defined(CONFIG_QUOTA) | |
2889 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
33458eab | 2890 | char *usr_qf_name, *grp_qf_name; |
2adf6da8 TT |
2891 | |
2892 | if (sbi->s_jquota_fmt) { | |
2893 | char *fmtname = ""; | |
2894 | ||
2895 | switch (sbi->s_jquota_fmt) { | |
2896 | case QFMT_VFS_OLD: | |
2897 | fmtname = "vfsold"; | |
2898 | break; | |
2899 | case QFMT_VFS_V0: | |
2900 | fmtname = "vfsv0"; | |
2901 | break; | |
2902 | case QFMT_VFS_V1: | |
2903 | fmtname = "vfsv1"; | |
2904 | break; | |
2905 | } | |
2906 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
2907 | } | |
2908 | ||
33458eab TT |
2909 | rcu_read_lock(); |
2910 | usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); | |
2911 | grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); | |
2912 | if (usr_qf_name) | |
2913 | seq_show_option(seq, "usrjquota", usr_qf_name); | |
2914 | if (grp_qf_name) | |
2915 | seq_show_option(seq, "grpjquota", grp_qf_name); | |
2916 | rcu_read_unlock(); | |
2adf6da8 TT |
2917 | #endif |
2918 | } | |
2919 | ||
5a916be1 TT |
2920 | static const char *token2str(int token) |
2921 | { | |
97d8a670 | 2922 | const struct fs_parameter_spec *spec; |
5a916be1 | 2923 | |
97d8a670 LC |
2924 | for (spec = ext4_param_specs; spec->name != NULL; spec++) |
2925 | if (spec->opt == token && !spec->type) | |
5a916be1 | 2926 | break; |
97d8a670 | 2927 | return spec->name; |
5a916be1 TT |
2928 | } |
2929 | ||
2adf6da8 TT |
2930 | /* |
2931 | * Show an option if | |
2932 | * - it's set to a non-default value OR | |
2933 | * - if the per-sb default is different from the global default | |
2934 | */ | |
66acdcf4 TT |
2935 | static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, |
2936 | int nodefs) | |
2adf6da8 | 2937 | { |
2adf6da8 TT |
2938 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2939 | struct ext4_super_block *es = sbi->s_es; | |
e3645d72 | 2940 | int def_errors; |
5a916be1 | 2941 | const struct mount_opts *m; |
66acdcf4 | 2942 | char sep = nodefs ? '\n' : ','; |
2adf6da8 | 2943 | |
66acdcf4 TT |
2944 | #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) |
2945 | #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) | |
2adf6da8 TT |
2946 | |
2947 | if (sbi->s_sb_block != 1) | |
5a916be1 TT |
2948 | SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); |
2949 | ||
2950 | for (m = ext4_mount_opts; m->token != Opt_err; m++) { | |
2951 | int want_set = m->flags & MOPT_SET; | |
e3645d72 ZY |
2952 | int opt_2 = m->flags & MOPT_2; |
2953 | unsigned int mount_opt, def_mount_opt; | |
2954 | ||
5a916be1 | 2955 | if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || |
ba2e524d | 2956 | m->flags & MOPT_SKIP) |
5a916be1 | 2957 | continue; |
e3645d72 ZY |
2958 | |
2959 | if (opt_2) { | |
2960 | mount_opt = sbi->s_mount_opt2; | |
2961 | def_mount_opt = sbi->s_def_mount_opt2; | |
2962 | } else { | |
2963 | mount_opt = sbi->s_mount_opt; | |
2964 | def_mount_opt = sbi->s_def_mount_opt; | |
2965 | } | |
2966 | /* skip if same as the default */ | |
2967 | if (!nodefs && !(m->mount_opt & (mount_opt ^ def_mount_opt))) | |
2968 | continue; | |
2969 | /* select Opt_noFoo vs Opt_Foo */ | |
5a916be1 | 2970 | if ((want_set && |
e3645d72 ZY |
2971 | (mount_opt & m->mount_opt) != m->mount_opt) || |
2972 | (!want_set && (mount_opt & m->mount_opt))) | |
2973 | continue; | |
5a916be1 | 2974 | SEQ_OPTS_PRINT("%s", token2str(m->token)); |
2adf6da8 | 2975 | } |
5a916be1 | 2976 | |
08cefc7a | 2977 | if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || |
5a916be1 | 2978 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) |
08cefc7a EB |
2979 | SEQ_OPTS_PRINT("resuid=%u", |
2980 | from_kuid_munged(&init_user_ns, sbi->s_resuid)); | |
2981 | if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || | |
5a916be1 | 2982 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) |
08cefc7a EB |
2983 | SEQ_OPTS_PRINT("resgid=%u", |
2984 | from_kgid_munged(&init_user_ns, sbi->s_resgid)); | |
66acdcf4 | 2985 | def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); |
5a916be1 TT |
2986 | if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) |
2987 | SEQ_OPTS_PUTS("errors=remount-ro"); | |
2adf6da8 | 2988 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
5a916be1 | 2989 | SEQ_OPTS_PUTS("errors=continue"); |
2adf6da8 | 2990 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
5a916be1 | 2991 | SEQ_OPTS_PUTS("errors=panic"); |
66acdcf4 | 2992 | if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) |
5a916be1 | 2993 | SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); |
66acdcf4 | 2994 | if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) |
5a916be1 | 2995 | SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); |
66acdcf4 | 2996 | if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) |
5a916be1 | 2997 | SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); |
66acdcf4 | 2998 | if (nodefs || sbi->s_stripe) |
5a916be1 | 2999 | SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); |
68afa7e0 | 3000 | if (nodefs || EXT4_MOUNT_DATA_FLAGS & |
e3645d72 | 3001 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { |
5a916be1 TT |
3002 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
3003 | SEQ_OPTS_PUTS("data=journal"); | |
3004 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3005 | SEQ_OPTS_PUTS("data=ordered"); | |
3006 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) | |
3007 | SEQ_OPTS_PUTS("data=writeback"); | |
3008 | } | |
66acdcf4 TT |
3009 | if (nodefs || |
3010 | sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) | |
5a916be1 TT |
3011 | SEQ_OPTS_PRINT("inode_readahead_blks=%u", |
3012 | sbi->s_inode_readahead_blks); | |
2adf6da8 | 3013 | |
ceec0376 | 3014 | if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || |
66acdcf4 | 3015 | (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) |
5a916be1 | 3016 | SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); |
df981d03 TT |
3017 | if (nodefs || sbi->s_max_dir_size_kb) |
3018 | SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); | |
7915a861 AN |
3019 | if (test_opt(sb, DATA_ERR_ABORT)) |
3020 | SEQ_OPTS_PUTS("data_err=abort"); | |
ed318a6c EB |
3021 | |
3022 | fscrypt_show_test_dummy_encryption(seq, sep, sb); | |
2adf6da8 | 3023 | |
4f74d15f EB |
3024 | if (sb->s_flags & SB_INLINECRYPT) |
3025 | SEQ_OPTS_PUTS("inlinecrypt"); | |
3026 | ||
9cb20f94 IW |
3027 | if (test_opt(sb, DAX_ALWAYS)) { |
3028 | if (IS_EXT2_SB(sb)) | |
3029 | SEQ_OPTS_PUTS("dax"); | |
3030 | else | |
3031 | SEQ_OPTS_PUTS("dax=always"); | |
3032 | } else if (test_opt2(sb, DAX_NEVER)) { | |
3033 | SEQ_OPTS_PUTS("dax=never"); | |
3034 | } else if (test_opt2(sb, DAX_INODE)) { | |
3035 | SEQ_OPTS_PUTS("dax=inode"); | |
3036 | } | |
3fa5d23e OM |
3037 | |
3038 | if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && | |
3039 | !test_opt2(sb, MB_OPTIMIZE_SCAN)) { | |
3040 | SEQ_OPTS_PUTS("mb_optimize_scan=0"); | |
3041 | } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && | |
3042 | test_opt2(sb, MB_OPTIMIZE_SCAN)) { | |
3043 | SEQ_OPTS_PUTS("mb_optimize_scan=1"); | |
3044 | } | |
3045 | ||
2adf6da8 | 3046 | ext4_show_quota_options(seq, sb); |
2adf6da8 TT |
3047 | return 0; |
3048 | } | |
3049 | ||
66acdcf4 TT |
3050 | static int ext4_show_options(struct seq_file *seq, struct dentry *root) |
3051 | { | |
3052 | return _ext4_show_options(seq, root->d_sb, 0); | |
3053 | } | |
3054 | ||
ebd173be | 3055 | int ext4_seq_options_show(struct seq_file *seq, void *offset) |
66acdcf4 TT |
3056 | { |
3057 | struct super_block *sb = seq->private; | |
3058 | int rc; | |
3059 | ||
bc98a42c | 3060 | seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); |
66acdcf4 TT |
3061 | rc = _ext4_show_options(seq, sb, 1); |
3062 | seq_puts(seq, "\n"); | |
3063 | return rc; | |
3064 | } | |
3065 | ||
617ba13b | 3066 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
3067 | int read_only) |
3068 | { | |
617ba13b | 3069 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
c89128a0 | 3070 | int err = 0; |
ac27a0ec | 3071 | |
617ba13b | 3072 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
3073 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
3074 | "forcing read-only mode"); | |
c89128a0 | 3075 | err = -EROFS; |
5adaccac | 3076 | goto done; |
ac27a0ec DK |
3077 | } |
3078 | if (read_only) | |
281b5995 | 3079 | goto done; |
617ba13b | 3080 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
3081 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
3082 | "running e2fsck is recommended"); | |
c8b459f4 | 3083 | else if (sbi->s_mount_state & EXT4_ERROR_FS) |
b31e1552 ES |
3084 | ext4_msg(sb, KERN_WARNING, |
3085 | "warning: mounting fs with errors, " | |
3086 | "running e2fsck is recommended"); | |
ed3ce80a | 3087 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && |
ac27a0ec DK |
3088 | le16_to_cpu(es->s_mnt_count) >= |
3089 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
3090 | ext4_msg(sb, KERN_WARNING, |
3091 | "warning: maximal mount count reached, " | |
3092 | "running e2fsck is recommended"); | |
ac27a0ec | 3093 | else if (le32_to_cpu(es->s_checkinterval) && |
6a0678a7 AB |
3094 | (ext4_get_tstamp(es, s_lastcheck) + |
3095 | le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) | |
b31e1552 ES |
3096 | ext4_msg(sb, KERN_WARNING, |
3097 | "warning: checktime reached, " | |
3098 | "running e2fsck is recommended"); | |
0b8e58a1 | 3099 | if (!sbi->s_journal) |
0390131b | 3100 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 3101 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 3102 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 3103 | le16_add_cpu(&es->s_mnt_count, 1); |
6a0678a7 | 3104 | ext4_update_tstamp(es, s_mtime); |
02f310fc | 3105 | if (sbi->s_journal) { |
e2b911c5 | 3106 | ext4_set_feature_journal_needs_recovery(sb); |
02f310fc JK |
3107 | if (ext4_has_feature_orphan_file(sb)) |
3108 | ext4_set_feature_orphan_present(sb); | |
3109 | } | |
ac27a0ec | 3110 | |
4392fbc4 | 3111 | err = ext4_commit_super(sb); |
281b5995 | 3112 | done: |
ac27a0ec | 3113 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 3114 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
a2595b8a | 3115 | "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", |
ac27a0ec DK |
3116 | sb->s_blocksize, |
3117 | sbi->s_groups_count, | |
617ba13b MC |
3118 | EXT4_BLOCKS_PER_GROUP(sb), |
3119 | EXT4_INODES_PER_GROUP(sb), | |
a2595b8a | 3120 | sbi->s_mount_opt, sbi->s_mount_opt2); |
c89128a0 | 3121 | return err; |
ac27a0ec DK |
3122 | } |
3123 | ||
117fff10 TT |
3124 | int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) |
3125 | { | |
3126 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7c990728 | 3127 | struct flex_groups **old_groups, **new_groups; |
37b0b6b8 | 3128 | int size, i, j; |
117fff10 TT |
3129 | |
3130 | if (!sbi->s_log_groups_per_flex) | |
3131 | return 0; | |
3132 | ||
3133 | size = ext4_flex_group(sbi, ngroup - 1) + 1; | |
3134 | if (size <= sbi->s_flex_groups_allocated) | |
3135 | return 0; | |
3136 | ||
7c990728 SJS |
3137 | new_groups = kvzalloc(roundup_pow_of_two(size * |
3138 | sizeof(*sbi->s_flex_groups)), GFP_KERNEL); | |
117fff10 | 3139 | if (!new_groups) { |
7c990728 SJS |
3140 | ext4_msg(sb, KERN_ERR, |
3141 | "not enough memory for %d flex group pointers", size); | |
117fff10 TT |
3142 | return -ENOMEM; |
3143 | } | |
7c990728 SJS |
3144 | for (i = sbi->s_flex_groups_allocated; i < size; i++) { |
3145 | new_groups[i] = kvzalloc(roundup_pow_of_two( | |
3146 | sizeof(struct flex_groups)), | |
3147 | GFP_KERNEL); | |
3148 | if (!new_groups[i]) { | |
37b0b6b8 DC |
3149 | for (j = sbi->s_flex_groups_allocated; j < i; j++) |
3150 | kvfree(new_groups[j]); | |
7c990728 SJS |
3151 | kvfree(new_groups); |
3152 | ext4_msg(sb, KERN_ERR, | |
3153 | "not enough memory for %d flex groups", size); | |
3154 | return -ENOMEM; | |
3155 | } | |
117fff10 | 3156 | } |
7c990728 SJS |
3157 | rcu_read_lock(); |
3158 | old_groups = rcu_dereference(sbi->s_flex_groups); | |
3159 | if (old_groups) | |
3160 | memcpy(new_groups, old_groups, | |
3161 | (sbi->s_flex_groups_allocated * | |
3162 | sizeof(struct flex_groups *))); | |
3163 | rcu_read_unlock(); | |
3164 | rcu_assign_pointer(sbi->s_flex_groups, new_groups); | |
3165 | sbi->s_flex_groups_allocated = size; | |
3166 | if (old_groups) | |
3167 | ext4_kvfree_array_rcu(old_groups); | |
117fff10 TT |
3168 | return 0; |
3169 | } | |
3170 | ||
772cb7c8 JS |
3171 | static int ext4_fill_flex_info(struct super_block *sb) |
3172 | { | |
3173 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
3174 | struct ext4_group_desc *gdp = NULL; | |
7c990728 | 3175 | struct flex_groups *fg; |
772cb7c8 | 3176 | ext4_group_t flex_group; |
117fff10 | 3177 | int i, err; |
772cb7c8 | 3178 | |
503358ae | 3179 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
d50f2ab6 | 3180 | if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { |
772cb7c8 JS |
3181 | sbi->s_log_groups_per_flex = 0; |
3182 | return 1; | |
3183 | } | |
3184 | ||
117fff10 TT |
3185 | err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); |
3186 | if (err) | |
9933fc0a | 3187 | goto failed; |
772cb7c8 | 3188 | |
772cb7c8 | 3189 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 3190 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
3191 | |
3192 | flex_group = ext4_flex_group(sbi, i); | |
7c990728 SJS |
3193 | fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); |
3194 | atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); | |
90ba983f | 3195 | atomic64_add(ext4_free_group_clusters(sb, gdp), |
7c990728 SJS |
3196 | &fg->free_clusters); |
3197 | atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); | |
772cb7c8 JS |
3198 | } |
3199 | ||
3200 | return 1; | |
3201 | failed: | |
3202 | return 0; | |
3203 | } | |
3204 | ||
e2b911c5 | 3205 | static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, |
feb0ab32 | 3206 | struct ext4_group_desc *gdp) |
717d50e4 | 3207 | { |
b47820ed | 3208 | int offset = offsetof(struct ext4_group_desc, bg_checksum); |
717d50e4 | 3209 | __u16 crc = 0; |
feb0ab32 | 3210 | __le32 le_group = cpu_to_le32(block_group); |
e2b911c5 | 3211 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
717d50e4 | 3212 | |
9aa5d32b | 3213 | if (ext4_has_metadata_csum(sbi->s_sb)) { |
feb0ab32 | 3214 | /* Use new metadata_csum algorithm */ |
feb0ab32 | 3215 | __u32 csum32; |
b47820ed | 3216 | __u16 dummy_csum = 0; |
feb0ab32 | 3217 | |
feb0ab32 DW |
3218 | csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, |
3219 | sizeof(le_group)); | |
b47820ed DJ |
3220 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); |
3221 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, | |
3222 | sizeof(dummy_csum)); | |
3223 | offset += sizeof(dummy_csum); | |
3224 | if (offset < sbi->s_desc_size) | |
3225 | csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, | |
3226 | sbi->s_desc_size - offset); | |
feb0ab32 DW |
3227 | |
3228 | crc = csum32 & 0xFFFF; | |
3229 | goto out; | |
717d50e4 AD |
3230 | } |
3231 | ||
feb0ab32 | 3232 | /* old crc16 code */ |
e2b911c5 | 3233 | if (!ext4_has_feature_gdt_csum(sb)) |
813d32f9 DW |
3234 | return 0; |
3235 | ||
feb0ab32 DW |
3236 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); |
3237 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
3238 | crc = crc16(crc, (__u8 *)gdp, offset); | |
3239 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
3240 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
e2b911c5 | 3241 | if (ext4_has_feature_64bit(sb) && |
feb0ab32 DW |
3242 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) |
3243 | crc = crc16(crc, (__u8 *)gdp + offset, | |
3244 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
3245 | offset); | |
3246 | ||
3247 | out: | |
717d50e4 AD |
3248 | return cpu_to_le16(crc); |
3249 | } | |
3250 | ||
feb0ab32 | 3251 | int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, |
717d50e4 AD |
3252 | struct ext4_group_desc *gdp) |
3253 | { | |
feb0ab32 | 3254 | if (ext4_has_group_desc_csum(sb) && |
e2b911c5 | 3255 | (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) |
717d50e4 AD |
3256 | return 0; |
3257 | ||
3258 | return 1; | |
3259 | } | |
3260 | ||
feb0ab32 DW |
3261 | void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, |
3262 | struct ext4_group_desc *gdp) | |
3263 | { | |
3264 | if (!ext4_has_group_desc_csum(sb)) | |
3265 | return; | |
e2b911c5 | 3266 | gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); |
feb0ab32 DW |
3267 | } |
3268 | ||
ac27a0ec | 3269 | /* Called at mount-time, super-block is locked */ |
bfff6873 | 3270 | static int ext4_check_descriptors(struct super_block *sb, |
829fa70d | 3271 | ext4_fsblk_t sb_block, |
bfff6873 | 3272 | ext4_group_t *first_not_zeroed) |
ac27a0ec | 3273 | { |
617ba13b MC |
3274 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
3275 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
3276 | ext4_fsblk_t last_block; | |
44de022c | 3277 | ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); |
bd81d8ee LV |
3278 | ext4_fsblk_t block_bitmap; |
3279 | ext4_fsblk_t inode_bitmap; | |
3280 | ext4_fsblk_t inode_table; | |
ce421581 | 3281 | int flexbg_flag = 0; |
bfff6873 | 3282 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 3283 | |
e2b911c5 | 3284 | if (ext4_has_feature_flex_bg(sb)) |
ce421581 JS |
3285 | flexbg_flag = 1; |
3286 | ||
af5bc92d | 3287 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 3288 | |
197cd65a AM |
3289 | for (i = 0; i < sbi->s_groups_count; i++) { |
3290 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
3291 | ||
ce421581 | 3292 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 3293 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
3294 | else |
3295 | last_block = first_block + | |
617ba13b | 3296 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 3297 | |
bfff6873 LC |
3298 | if ((grp == sbi->s_groups_count) && |
3299 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3300 | grp = i; | |
3301 | ||
8fadc143 | 3302 | block_bitmap = ext4_block_bitmap(sb, gdp); |
829fa70d TT |
3303 | if (block_bitmap == sb_block) { |
3304 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3305 | "Block bitmap for group %u overlaps " | |
3306 | "superblock", i); | |
18db4b4e TT |
3307 | if (!sb_rdonly(sb)) |
3308 | return 0; | |
829fa70d | 3309 | } |
77260807 TT |
3310 | if (block_bitmap >= sb_block + 1 && |
3311 | block_bitmap <= last_bg_block) { | |
3312 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3313 | "Block bitmap for group %u overlaps " | |
3314 | "block group descriptors", i); | |
3315 | if (!sb_rdonly(sb)) | |
3316 | return 0; | |
3317 | } | |
2b2d6d01 | 3318 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 3319 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 3320 | "Block bitmap for group %u not in group " |
b31e1552 | 3321 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
3322 | return 0; |
3323 | } | |
8fadc143 | 3324 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
829fa70d TT |
3325 | if (inode_bitmap == sb_block) { |
3326 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3327 | "Inode bitmap for group %u overlaps " | |
3328 | "superblock", i); | |
18db4b4e TT |
3329 | if (!sb_rdonly(sb)) |
3330 | return 0; | |
829fa70d | 3331 | } |
77260807 TT |
3332 | if (inode_bitmap >= sb_block + 1 && |
3333 | inode_bitmap <= last_bg_block) { | |
3334 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3335 | "Inode bitmap for group %u overlaps " | |
3336 | "block group descriptors", i); | |
3337 | if (!sb_rdonly(sb)) | |
3338 | return 0; | |
3339 | } | |
2b2d6d01 | 3340 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 3341 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 3342 | "Inode bitmap for group %u not in group " |
b31e1552 | 3343 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
3344 | return 0; |
3345 | } | |
8fadc143 | 3346 | inode_table = ext4_inode_table(sb, gdp); |
829fa70d TT |
3347 | if (inode_table == sb_block) { |
3348 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3349 | "Inode table for group %u overlaps " | |
3350 | "superblock", i); | |
18db4b4e TT |
3351 | if (!sb_rdonly(sb)) |
3352 | return 0; | |
829fa70d | 3353 | } |
77260807 TT |
3354 | if (inode_table >= sb_block + 1 && |
3355 | inode_table <= last_bg_block) { | |
3356 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " | |
3357 | "Inode table for group %u overlaps " | |
3358 | "block group descriptors", i); | |
3359 | if (!sb_rdonly(sb)) | |
3360 | return 0; | |
3361 | } | |
bd81d8ee | 3362 | if (inode_table < first_block || |
2b2d6d01 | 3363 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 3364 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 3365 | "Inode table for group %u not in group " |
b31e1552 | 3366 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
3367 | return 0; |
3368 | } | |
955ce5f5 | 3369 | ext4_lock_group(sb, i); |
feb0ab32 | 3370 | if (!ext4_group_desc_csum_verify(sb, i, gdp)) { |
b31e1552 ES |
3371 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
3372 | "Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 3373 | i, le16_to_cpu(ext4_group_desc_csum(sb, i, |
b31e1552 | 3374 | gdp)), le16_to_cpu(gdp->bg_checksum)); |
bc98a42c | 3375 | if (!sb_rdonly(sb)) { |
955ce5f5 | 3376 | ext4_unlock_group(sb, i); |
8a266467 | 3377 | return 0; |
7ee1ec4c | 3378 | } |
717d50e4 | 3379 | } |
955ce5f5 | 3380 | ext4_unlock_group(sb, i); |
ce421581 JS |
3381 | if (!flexbg_flag) |
3382 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 3383 | } |
bfff6873 LC |
3384 | if (NULL != first_not_zeroed) |
3385 | *first_not_zeroed = grp; | |
ac27a0ec DK |
3386 | return 1; |
3387 | } | |
3388 | ||
cd2291a4 ES |
3389 | /* |
3390 | * Maximal extent format file size. | |
3391 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
3392 | * extent format containers, within a sector_t, and within i_blocks | |
3393 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
3394 | * so that won't be a limiting factor. | |
3395 | * | |
f17722f9 LC |
3396 | * However there is other limiting factor. We do store extents in the form |
3397 | * of starting block and length, hence the resulting length of the extent | |
3398 | * covering maximum file size must fit into on-disk format containers as | |
3399 | * well. Given that length is always by 1 unit bigger than max unit (because | |
3400 | * we count 0 as well) we have to lower the s_maxbytes by one fs block. | |
3401 | * | |
cd2291a4 ES |
3402 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. |
3403 | */ | |
f287a1a5 | 3404 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
3405 | { |
3406 | loff_t res; | |
3407 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
3408 | ||
72deb455 CH |
3409 | BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); |
3410 | ||
3411 | if (!has_huge_files) { | |
cd2291a4 ES |
3412 | upper_limit = (1LL << 32) - 1; |
3413 | ||
3414 | /* total blocks in file system block size */ | |
3415 | upper_limit >>= (blkbits - 9); | |
3416 | upper_limit <<= blkbits; | |
3417 | } | |
3418 | ||
f17722f9 LC |
3419 | /* |
3420 | * 32-bit extent-start container, ee_block. We lower the maxbytes | |
3421 | * by one fs block, so ee_len can cover the extent of maximum file | |
3422 | * size | |
3423 | */ | |
3424 | res = (1LL << 32) - 1; | |
cd2291a4 | 3425 | res <<= blkbits; |
cd2291a4 ES |
3426 | |
3427 | /* Sanity check against vm- & vfs- imposed limits */ | |
3428 | if (res > upper_limit) | |
3429 | res = upper_limit; | |
3430 | ||
3431 | return res; | |
3432 | } | |
ac27a0ec | 3433 | |
ac27a0ec | 3434 | /* |
cd2291a4 | 3435 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
3436 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
3437 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 3438 | */ |
f287a1a5 | 3439 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 3440 | { |
5c93e8ec | 3441 | loff_t upper_limit, res = EXT4_NDIR_BLOCKS; |
0fc1b451 | 3442 | int meta_blocks; |
5c93e8ec | 3443 | unsigned int ppb = 1 << (bits - 2); |
75ca6ad4 RH |
3444 | |
3445 | /* | |
3446 | * This is calculated to be the largest file size for a dense, block | |
0b8e58a1 AD |
3447 | * mapped file such that the file's total number of 512-byte sectors, |
3448 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
3449 | * | |
3450 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
3451 | * number of 512-byte sectors of the file. | |
0fc1b451 | 3452 | */ |
72deb455 | 3453 | if (!has_huge_files) { |
0fc1b451 | 3454 | /* |
72deb455 CH |
3455 | * !has_huge_files or implies that the inode i_block field |
3456 | * represents total file blocks in 2^32 512-byte sectors == | |
3457 | * size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
3458 | */ |
3459 | upper_limit = (1LL << 32) - 1; | |
3460 | ||
3461 | /* total blocks in file system block size */ | |
3462 | upper_limit >>= (bits - 9); | |
3463 | ||
3464 | } else { | |
8180a562 AK |
3465 | /* |
3466 | * We use 48 bit ext4_inode i_blocks | |
3467 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
3468 | * represent total number of blocks in | |
3469 | * file system block size | |
3470 | */ | |
0fc1b451 AK |
3471 | upper_limit = (1LL << 48) - 1; |
3472 | ||
0fc1b451 AK |
3473 | } |
3474 | ||
5c93e8ec ZY |
3475 | /* Compute how many blocks we can address by block tree */ |
3476 | res += ppb; | |
3477 | res += ppb * ppb; | |
3478 | res += ((loff_t)ppb) * ppb * ppb; | |
3479 | /* Compute how many metadata blocks are needed */ | |
3480 | meta_blocks = 1; | |
3481 | meta_blocks += 1 + ppb; | |
3482 | meta_blocks += 1 + ppb + ppb * ppb; | |
3483 | /* Does block tree limit file size? */ | |
3484 | if (res + meta_blocks <= upper_limit) | |
3485 | goto check_lfs; | |
3486 | ||
3487 | res = upper_limit; | |
3488 | /* How many metadata blocks are needed for addressing upper_limit? */ | |
3489 | upper_limit -= EXT4_NDIR_BLOCKS; | |
0fc1b451 AK |
3490 | /* indirect blocks */ |
3491 | meta_blocks = 1; | |
5c93e8ec | 3492 | upper_limit -= ppb; |
0fc1b451 | 3493 | /* double indirect blocks */ |
5c93e8ec ZY |
3494 | if (upper_limit < ppb * ppb) { |
3495 | meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); | |
3496 | res -= meta_blocks; | |
3497 | goto check_lfs; | |
3498 | } | |
3499 | meta_blocks += 1 + ppb; | |
3500 | upper_limit -= ppb * ppb; | |
3501 | /* tripple indirect blocks for the rest */ | |
3502 | meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + | |
3503 | DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); | |
3504 | res -= meta_blocks; | |
3505 | check_lfs: | |
ac27a0ec | 3506 | res <<= bits; |
0fc1b451 AK |
3507 | if (res > MAX_LFS_FILESIZE) |
3508 | res = MAX_LFS_FILESIZE; | |
3509 | ||
5c93e8ec | 3510 | return res; |
ac27a0ec DK |
3511 | } |
3512 | ||
617ba13b | 3513 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 3514 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 3515 | { |
617ba13b | 3516 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 3517 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
3518 | int has_super = 0; |
3519 | ||
3520 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
3521 | ||
e2b911c5 | 3522 | if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) |
70bbb3e0 | 3523 | return logical_sb_block + nr + 1; |
ac27a0ec | 3524 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 3525 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 3526 | has_super = 1; |
0b8e58a1 | 3527 | |
bd63f6b0 DW |
3528 | /* |
3529 | * If we have a meta_bg fs with 1k blocks, group 0's GDT is at | |
3530 | * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled | |
3531 | * on modern mke2fs or blksize > 1k on older mke2fs) then we must | |
3532 | * compensate. | |
3533 | */ | |
3534 | if (sb->s_blocksize == 1024 && nr == 0 && | |
49598e04 | 3535 | le32_to_cpu(sbi->s_es->s_first_data_block) == 0) |
bd63f6b0 DW |
3536 | has_super++; |
3537 | ||
617ba13b | 3538 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
3539 | } |
3540 | ||
c9de560d AT |
3541 | /** |
3542 | * ext4_get_stripe_size: Get the stripe size. | |
3543 | * @sbi: In memory super block info | |
3544 | * | |
3545 | * If we have specified it via mount option, then | |
3546 | * use the mount option value. If the value specified at mount time is | |
3547 | * greater than the blocks per group use the super block value. | |
3548 | * If the super block value is greater than blocks per group return 0. | |
3549 | * Allocator needs it be less than blocks per group. | |
3550 | * | |
3551 | */ | |
3552 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
3553 | { | |
3554 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
3555 | unsigned long stripe_width = | |
3556 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
3eb08658 | 3557 | int ret; |
c9de560d AT |
3558 | |
3559 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
3eb08658 | 3560 | ret = sbi->s_stripe; |
5469d7c3 | 3561 | else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) |
3eb08658 | 3562 | ret = stripe_width; |
5469d7c3 | 3563 | else if (stride && stride <= sbi->s_blocks_per_group) |
3eb08658 DE |
3564 | ret = stride; |
3565 | else | |
3566 | ret = 0; | |
c9de560d | 3567 | |
3eb08658 DE |
3568 | /* |
3569 | * If the stripe width is 1, this makes no sense and | |
3570 | * we set it to 0 to turn off stripe handling code. | |
3571 | */ | |
3572 | if (ret <= 1) | |
3573 | ret = 0; | |
c9de560d | 3574 | |
3eb08658 | 3575 | return ret; |
c9de560d | 3576 | } |
ac27a0ec | 3577 | |
a13fb1a4 ES |
3578 | /* |
3579 | * Check whether this filesystem can be mounted based on | |
3580 | * the features present and the RDONLY/RDWR mount requested. | |
3581 | * Returns 1 if this filesystem can be mounted as requested, | |
3582 | * 0 if it cannot be. | |
3583 | */ | |
25c6d98f | 3584 | int ext4_feature_set_ok(struct super_block *sb, int readonly) |
a13fb1a4 | 3585 | { |
e2b911c5 | 3586 | if (ext4_has_unknown_ext4_incompat_features(sb)) { |
a13fb1a4 ES |
3587 | ext4_msg(sb, KERN_ERR, |
3588 | "Couldn't mount because of " | |
3589 | "unsupported optional features (%x)", | |
3590 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
3591 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
3592 | return 0; | |
3593 | } | |
3594 | ||
5298d4bf | 3595 | #if !IS_ENABLED(CONFIG_UNICODE) |
c83ad55e GKB |
3596 | if (ext4_has_feature_casefold(sb)) { |
3597 | ext4_msg(sb, KERN_ERR, | |
3598 | "Filesystem with casefold feature cannot be " | |
3599 | "mounted without CONFIG_UNICODE"); | |
3600 | return 0; | |
3601 | } | |
3602 | #endif | |
3603 | ||
a13fb1a4 ES |
3604 | if (readonly) |
3605 | return 1; | |
3606 | ||
e2b911c5 | 3607 | if (ext4_has_feature_readonly(sb)) { |
2cb5cc8b | 3608 | ext4_msg(sb, KERN_INFO, "filesystem is read-only"); |
1751e8a6 | 3609 | sb->s_flags |= SB_RDONLY; |
2cb5cc8b DW |
3610 | return 1; |
3611 | } | |
3612 | ||
a13fb1a4 | 3613 | /* Check that feature set is OK for a read-write mount */ |
e2b911c5 | 3614 | if (ext4_has_unknown_ext4_ro_compat_features(sb)) { |
a13fb1a4 ES |
3615 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " |
3616 | "unsupported optional features (%x)", | |
3617 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
3618 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
3619 | return 0; | |
3620 | } | |
e2b911c5 | 3621 | if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { |
bab08ab9 TT |
3622 | ext4_msg(sb, KERN_ERR, |
3623 | "Can't support bigalloc feature without " | |
3624 | "extents feature\n"); | |
3625 | return 0; | |
3626 | } | |
7c319d32 | 3627 | |
9db176bc | 3628 | #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) |
d65d87a0 TT |
3629 | if (!readonly && (ext4_has_feature_quota(sb) || |
3630 | ext4_has_feature_project(sb))) { | |
7c319d32 | 3631 | ext4_msg(sb, KERN_ERR, |
d65d87a0 | 3632 | "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); |
689c958c LX |
3633 | return 0; |
3634 | } | |
7c319d32 | 3635 | #endif /* CONFIG_QUOTA */ |
a13fb1a4 ES |
3636 | return 1; |
3637 | } | |
3638 | ||
66e61a9e TT |
3639 | /* |
3640 | * This function is called once a day if we have errors logged | |
3641 | * on the file system | |
3642 | */ | |
235699a8 | 3643 | static void print_daily_error_info(struct timer_list *t) |
66e61a9e | 3644 | { |
235699a8 KC |
3645 | struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); |
3646 | struct super_block *sb = sbi->s_sb; | |
3647 | struct ext4_super_block *es = sbi->s_es; | |
66e61a9e TT |
3648 | |
3649 | if (es->s_error_count) | |
ae0f78de TT |
3650 | /* fsck newer than v1.41.13 is needed to clean this condition. */ |
3651 | ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", | |
66e61a9e TT |
3652 | le32_to_cpu(es->s_error_count)); |
3653 | if (es->s_first_error_time) { | |
6a0678a7 AB |
3654 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", |
3655 | sb->s_id, | |
3656 | ext4_get_tstamp(es, s_first_error_time), | |
66e61a9e TT |
3657 | (int) sizeof(es->s_first_error_func), |
3658 | es->s_first_error_func, | |
3659 | le32_to_cpu(es->s_first_error_line)); | |
3660 | if (es->s_first_error_ino) | |
651e1c3b | 3661 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
3662 | le32_to_cpu(es->s_first_error_ino)); |
3663 | if (es->s_first_error_block) | |
651e1c3b | 3664 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 3665 | le64_to_cpu(es->s_first_error_block)); |
651e1c3b | 3666 | printk(KERN_CONT "\n"); |
66e61a9e TT |
3667 | } |
3668 | if (es->s_last_error_time) { | |
6a0678a7 AB |
3669 | printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", |
3670 | sb->s_id, | |
3671 | ext4_get_tstamp(es, s_last_error_time), | |
66e61a9e TT |
3672 | (int) sizeof(es->s_last_error_func), |
3673 | es->s_last_error_func, | |
3674 | le32_to_cpu(es->s_last_error_line)); | |
3675 | if (es->s_last_error_ino) | |
651e1c3b | 3676 | printk(KERN_CONT ": inode %u", |
66e61a9e TT |
3677 | le32_to_cpu(es->s_last_error_ino)); |
3678 | if (es->s_last_error_block) | |
651e1c3b | 3679 | printk(KERN_CONT ": block %llu", (unsigned long long) |
66e61a9e | 3680 | le64_to_cpu(es->s_last_error_block)); |
651e1c3b | 3681 | printk(KERN_CONT "\n"); |
66e61a9e TT |
3682 | } |
3683 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
3684 | } | |
3685 | ||
bfff6873 LC |
3686 | /* Find next suitable group and run ext4_init_inode_table */ |
3687 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
3688 | { | |
3689 | struct ext4_group_desc *gdp = NULL; | |
3d392b26 TT |
3690 | struct super_block *sb = elr->lr_super; |
3691 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
3692 | ext4_group_t group = elr->lr_next_group; | |
3d392b26 | 3693 | unsigned int prefetch_ios = 0; |
bfff6873 | 3694 | int ret = 0; |
39fec688 | 3695 | u64 start_time; |
bfff6873 | 3696 | |
3d392b26 TT |
3697 | if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { |
3698 | elr->lr_next_group = ext4_mb_prefetch(sb, group, | |
3699 | EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); | |
3700 | if (prefetch_ios) | |
3701 | ext4_mb_prefetch_fini(sb, elr->lr_next_group, | |
3702 | prefetch_ios); | |
3703 | trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, | |
3704 | prefetch_ios); | |
3705 | if (group >= elr->lr_next_group) { | |
3706 | ret = 1; | |
3707 | if (elr->lr_first_not_zeroed != ngroups && | |
3708 | !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { | |
3709 | elr->lr_next_group = elr->lr_first_not_zeroed; | |
3710 | elr->lr_mode = EXT4_LI_MODE_ITABLE; | |
3711 | ret = 0; | |
3712 | } | |
3713 | } | |
3714 | return ret; | |
3715 | } | |
bfff6873 | 3716 | |
3d392b26 | 3717 | for (; group < ngroups; group++) { |
bfff6873 LC |
3718 | gdp = ext4_get_group_desc(sb, group, NULL); |
3719 | if (!gdp) { | |
3720 | ret = 1; | |
3721 | break; | |
3722 | } | |
3723 | ||
3724 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
3725 | break; | |
3726 | } | |
3727 | ||
7f511862 | 3728 | if (group >= ngroups) |
bfff6873 LC |
3729 | ret = 1; |
3730 | ||
3731 | if (!ret) { | |
39fec688 | 3732 | start_time = ktime_get_real_ns(); |
bfff6873 LC |
3733 | ret = ext4_init_inode_table(sb, group, |
3734 | elr->lr_timeout ? 0 : 1); | |
3d392b26 | 3735 | trace_ext4_lazy_itable_init(sb, group); |
bfff6873 | 3736 | if (elr->lr_timeout == 0) { |
39fec688 SX |
3737 | elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * |
3738 | EXT4_SB(elr->lr_super)->s_li_wait_mult); | |
bfff6873 LC |
3739 | } |
3740 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
3741 | elr->lr_next_group = group + 1; | |
3742 | } | |
bfff6873 LC |
3743 | return ret; |
3744 | } | |
3745 | ||
3746 | /* | |
3747 | * Remove lr_request from the list_request and free the | |
4ed5c033 | 3748 | * request structure. Should be called with li_list_mtx held |
bfff6873 LC |
3749 | */ |
3750 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
3751 | { | |
bfff6873 LC |
3752 | if (!elr) |
3753 | return; | |
3754 | ||
bfff6873 | 3755 | list_del(&elr->lr_request); |
3d392b26 | 3756 | EXT4_SB(elr->lr_super)->s_li_request = NULL; |
bfff6873 LC |
3757 | kfree(elr); |
3758 | } | |
3759 | ||
3760 | static void ext4_unregister_li_request(struct super_block *sb) | |
3761 | { | |
1bb933fb LC |
3762 | mutex_lock(&ext4_li_mtx); |
3763 | if (!ext4_li_info) { | |
3764 | mutex_unlock(&ext4_li_mtx); | |
bfff6873 | 3765 | return; |
1bb933fb | 3766 | } |
bfff6873 LC |
3767 | |
3768 | mutex_lock(&ext4_li_info->li_list_mtx); | |
1bb933fb | 3769 | ext4_remove_li_request(EXT4_SB(sb)->s_li_request); |
bfff6873 | 3770 | mutex_unlock(&ext4_li_info->li_list_mtx); |
1bb933fb | 3771 | mutex_unlock(&ext4_li_mtx); |
bfff6873 LC |
3772 | } |
3773 | ||
8f1f7453 ES |
3774 | static struct task_struct *ext4_lazyinit_task; |
3775 | ||
bfff6873 LC |
3776 | /* |
3777 | * This is the function where ext4lazyinit thread lives. It walks | |
3778 | * through the request list searching for next scheduled filesystem. | |
3779 | * When such a fs is found, run the lazy initialization request | |
3780 | * (ext4_rn_li_request) and keep track of the time spend in this | |
3781 | * function. Based on that time we compute next schedule time of | |
3782 | * the request. When walking through the list is complete, compute | |
3783 | * next waking time and put itself into sleep. | |
3784 | */ | |
3785 | static int ext4_lazyinit_thread(void *arg) | |
3786 | { | |
c30365b9 | 3787 | struct ext4_lazy_init *eli = arg; |
bfff6873 LC |
3788 | struct list_head *pos, *n; |
3789 | struct ext4_li_request *elr; | |
4ed5c033 | 3790 | unsigned long next_wakeup, cur; |
bfff6873 LC |
3791 | |
3792 | BUG_ON(NULL == eli); | |
3b575495 | 3793 | set_freezable(); |
bfff6873 | 3794 | |
bfff6873 LC |
3795 | cont_thread: |
3796 | while (true) { | |
3797 | next_wakeup = MAX_JIFFY_OFFSET; | |
3798 | ||
3799 | mutex_lock(&eli->li_list_mtx); | |
3800 | if (list_empty(&eli->li_request_list)) { | |
3801 | mutex_unlock(&eli->li_list_mtx); | |
3802 | goto exit_thread; | |
3803 | } | |
bfff6873 | 3804 | list_for_each_safe(pos, n, &eli->li_request_list) { |
e22834f0 DM |
3805 | int err = 0; |
3806 | int progress = 0; | |
bfff6873 LC |
3807 | elr = list_entry(pos, struct ext4_li_request, |
3808 | lr_request); | |
3809 | ||
e22834f0 DM |
3810 | if (time_before(jiffies, elr->lr_next_sched)) { |
3811 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
3812 | next_wakeup = elr->lr_next_sched; | |
3813 | continue; | |
3814 | } | |
3815 | if (down_read_trylock(&elr->lr_super->s_umount)) { | |
3816 | if (sb_start_write_trylock(elr->lr_super)) { | |
3817 | progress = 1; | |
3818 | /* | |
3819 | * We hold sb->s_umount, sb can not | |
3820 | * be removed from the list, it is | |
3821 | * now safe to drop li_list_mtx | |
3822 | */ | |
3823 | mutex_unlock(&eli->li_list_mtx); | |
3824 | err = ext4_run_li_request(elr); | |
3825 | sb_end_write(elr->lr_super); | |
3826 | mutex_lock(&eli->li_list_mtx); | |
3827 | n = pos->next; | |
b2c78cd0 | 3828 | } |
e22834f0 DM |
3829 | up_read((&elr->lr_super->s_umount)); |
3830 | } | |
3831 | /* error, remove the lazy_init job */ | |
3832 | if (err) { | |
3833 | ext4_remove_li_request(elr); | |
3834 | continue; | |
3835 | } | |
3836 | if (!progress) { | |
3837 | elr->lr_next_sched = jiffies + | |
8032bf12 | 3838 | get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); |
bfff6873 | 3839 | } |
bfff6873 LC |
3840 | if (time_before(elr->lr_next_sched, next_wakeup)) |
3841 | next_wakeup = elr->lr_next_sched; | |
3842 | } | |
3843 | mutex_unlock(&eli->li_list_mtx); | |
3844 | ||
a0acae0e | 3845 | try_to_freeze(); |
bfff6873 | 3846 | |
4ed5c033 LC |
3847 | cur = jiffies; |
3848 | if ((time_after_eq(cur, next_wakeup)) || | |
f4245bd4 | 3849 | (MAX_JIFFY_OFFSET == next_wakeup)) { |
bfff6873 LC |
3850 | cond_resched(); |
3851 | continue; | |
3852 | } | |
3853 | ||
4ed5c033 LC |
3854 | schedule_timeout_interruptible(next_wakeup - cur); |
3855 | ||
8f1f7453 ES |
3856 | if (kthread_should_stop()) { |
3857 | ext4_clear_request_list(); | |
3858 | goto exit_thread; | |
3859 | } | |
bfff6873 LC |
3860 | } |
3861 | ||
3862 | exit_thread: | |
3863 | /* | |
3864 | * It looks like the request list is empty, but we need | |
3865 | * to check it under the li_list_mtx lock, to prevent any | |
3866 | * additions into it, and of course we should lock ext4_li_mtx | |
3867 | * to atomically free the list and ext4_li_info, because at | |
3868 | * this point another ext4 filesystem could be registering | |
3869 | * new one. | |
3870 | */ | |
3871 | mutex_lock(&ext4_li_mtx); | |
3872 | mutex_lock(&eli->li_list_mtx); | |
3873 | if (!list_empty(&eli->li_request_list)) { | |
3874 | mutex_unlock(&eli->li_list_mtx); | |
3875 | mutex_unlock(&ext4_li_mtx); | |
3876 | goto cont_thread; | |
3877 | } | |
3878 | mutex_unlock(&eli->li_list_mtx); | |
bfff6873 LC |
3879 | kfree(ext4_li_info); |
3880 | ext4_li_info = NULL; | |
3881 | mutex_unlock(&ext4_li_mtx); | |
3882 | ||
3883 | return 0; | |
3884 | } | |
3885 | ||
3886 | static void ext4_clear_request_list(void) | |
3887 | { | |
3888 | struct list_head *pos, *n; | |
3889 | struct ext4_li_request *elr; | |
3890 | ||
3891 | mutex_lock(&ext4_li_info->li_list_mtx); | |
bfff6873 LC |
3892 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { |
3893 | elr = list_entry(pos, struct ext4_li_request, | |
3894 | lr_request); | |
3895 | ext4_remove_li_request(elr); | |
3896 | } | |
3897 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
3898 | } | |
3899 | ||
3900 | static int ext4_run_lazyinit_thread(void) | |
3901 | { | |
8f1f7453 ES |
3902 | ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, |
3903 | ext4_li_info, "ext4lazyinit"); | |
3904 | if (IS_ERR(ext4_lazyinit_task)) { | |
3905 | int err = PTR_ERR(ext4_lazyinit_task); | |
bfff6873 | 3906 | ext4_clear_request_list(); |
bfff6873 LC |
3907 | kfree(ext4_li_info); |
3908 | ext4_li_info = NULL; | |
92b97816 | 3909 | printk(KERN_CRIT "EXT4-fs: error %d creating inode table " |
bfff6873 LC |
3910 | "initialization thread\n", |
3911 | err); | |
3912 | return err; | |
3913 | } | |
3914 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
bfff6873 LC |
3915 | return 0; |
3916 | } | |
3917 | ||
3918 | /* | |
3919 | * Check whether it make sense to run itable init. thread or not. | |
3920 | * If there is at least one uninitialized inode table, return | |
3921 | * corresponding group number, else the loop goes through all | |
3922 | * groups and return total number of groups. | |
3923 | */ | |
3924 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
3925 | { | |
3926 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
3927 | struct ext4_group_desc *gdp = NULL; | |
3928 | ||
8844618d TT |
3929 | if (!ext4_has_group_desc_csum(sb)) |
3930 | return ngroups; | |
3931 | ||
bfff6873 LC |
3932 | for (group = 0; group < ngroups; group++) { |
3933 | gdp = ext4_get_group_desc(sb, group, NULL); | |
3934 | if (!gdp) | |
3935 | continue; | |
3936 | ||
50122847 | 3937 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) |
bfff6873 LC |
3938 | break; |
3939 | } | |
3940 | ||
3941 | return group; | |
3942 | } | |
3943 | ||
3944 | static int ext4_li_info_new(void) | |
3945 | { | |
3946 | struct ext4_lazy_init *eli = NULL; | |
3947 | ||
3948 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
3949 | if (!eli) | |
3950 | return -ENOMEM; | |
3951 | ||
bfff6873 LC |
3952 | INIT_LIST_HEAD(&eli->li_request_list); |
3953 | mutex_init(&eli->li_list_mtx); | |
3954 | ||
bfff6873 LC |
3955 | eli->li_state |= EXT4_LAZYINIT_QUIT; |
3956 | ||
3957 | ext4_li_info = eli; | |
3958 | ||
3959 | return 0; | |
3960 | } | |
3961 | ||
3962 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
3963 | ext4_group_t start) | |
3964 | { | |
bfff6873 | 3965 | struct ext4_li_request *elr; |
bfff6873 LC |
3966 | |
3967 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
3968 | if (!elr) | |
3969 | return NULL; | |
3970 | ||
3971 | elr->lr_super = sb; | |
3d392b26 | 3972 | elr->lr_first_not_zeroed = start; |
21175ca4 | 3973 | if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { |
3d392b26 TT |
3974 | elr->lr_mode = EXT4_LI_MODE_ITABLE; |
3975 | elr->lr_next_group = start; | |
21175ca4 HS |
3976 | } else { |
3977 | elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; | |
3d392b26 | 3978 | } |
bfff6873 LC |
3979 | |
3980 | /* | |
3981 | * Randomize first schedule time of the request to | |
3982 | * spread the inode table initialization requests | |
3983 | * better. | |
3984 | */ | |
8032bf12 | 3985 | elr->lr_next_sched = jiffies + get_random_u32_below(EXT4_DEF_LI_MAX_START_DELAY * HZ); |
bfff6873 LC |
3986 | return elr; |
3987 | } | |
3988 | ||
7f511862 TT |
3989 | int ext4_register_li_request(struct super_block *sb, |
3990 | ext4_group_t first_not_zeroed) | |
bfff6873 LC |
3991 | { |
3992 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
7f511862 | 3993 | struct ext4_li_request *elr = NULL; |
49598e04 | 3994 | ext4_group_t ngroups = sbi->s_groups_count; |
6c5a6cb9 | 3995 | int ret = 0; |
bfff6873 | 3996 | |
7f511862 | 3997 | mutex_lock(&ext4_li_mtx); |
51ce6511 LC |
3998 | if (sbi->s_li_request != NULL) { |
3999 | /* | |
4000 | * Reset timeout so it can be computed again, because | |
4001 | * s_li_wait_mult might have changed. | |
4002 | */ | |
4003 | sbi->s_li_request->lr_timeout = 0; | |
7f511862 | 4004 | goto out; |
51ce6511 | 4005 | } |
bfff6873 | 4006 | |
426d15ad JT |
4007 | if (sb_rdonly(sb) || |
4008 | (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && | |
4009 | (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) | |
7f511862 | 4010 | goto out; |
bfff6873 LC |
4011 | |
4012 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
7f511862 TT |
4013 | if (!elr) { |
4014 | ret = -ENOMEM; | |
4015 | goto out; | |
4016 | } | |
bfff6873 LC |
4017 | |
4018 | if (NULL == ext4_li_info) { | |
4019 | ret = ext4_li_info_new(); | |
4020 | if (ret) | |
4021 | goto out; | |
4022 | } | |
4023 | ||
4024 | mutex_lock(&ext4_li_info->li_list_mtx); | |
4025 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
4026 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
4027 | ||
4028 | sbi->s_li_request = elr; | |
46e4690b TM |
4029 | /* |
4030 | * set elr to NULL here since it has been inserted to | |
4031 | * the request_list and the removal and free of it is | |
4032 | * handled by ext4_clear_request_list from now on. | |
4033 | */ | |
4034 | elr = NULL; | |
bfff6873 LC |
4035 | |
4036 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
4037 | ret = ext4_run_lazyinit_thread(); | |
4038 | if (ret) | |
4039 | goto out; | |
4040 | } | |
bfff6873 | 4041 | out: |
beed5ecb NK |
4042 | mutex_unlock(&ext4_li_mtx); |
4043 | if (ret) | |
bfff6873 | 4044 | kfree(elr); |
bfff6873 LC |
4045 | return ret; |
4046 | } | |
4047 | ||
4048 | /* | |
4049 | * We do not need to lock anything since this is called on | |
4050 | * module unload. | |
4051 | */ | |
4052 | static void ext4_destroy_lazyinit_thread(void) | |
4053 | { | |
4054 | /* | |
4055 | * If thread exited earlier | |
4056 | * there's nothing to be done. | |
4057 | */ | |
8f1f7453 | 4058 | if (!ext4_li_info || !ext4_lazyinit_task) |
bfff6873 LC |
4059 | return; |
4060 | ||
8f1f7453 | 4061 | kthread_stop(ext4_lazyinit_task); |
bfff6873 LC |
4062 | } |
4063 | ||
25ed6e8a DW |
4064 | static int set_journal_csum_feature_set(struct super_block *sb) |
4065 | { | |
4066 | int ret = 1; | |
4067 | int compat, incompat; | |
4068 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4069 | ||
9aa5d32b | 4070 | if (ext4_has_metadata_csum(sb)) { |
db9ee220 | 4071 | /* journal checksum v3 */ |
25ed6e8a | 4072 | compat = 0; |
db9ee220 | 4073 | incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; |
25ed6e8a DW |
4074 | } else { |
4075 | /* journal checksum v1 */ | |
4076 | compat = JBD2_FEATURE_COMPAT_CHECKSUM; | |
4077 | incompat = 0; | |
4078 | } | |
4079 | ||
feb8c6d3 DW |
4080 | jbd2_journal_clear_features(sbi->s_journal, |
4081 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
4082 | JBD2_FEATURE_INCOMPAT_CSUM_V3 | | |
4083 | JBD2_FEATURE_INCOMPAT_CSUM_V2); | |
25ed6e8a DW |
4084 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
4085 | ret = jbd2_journal_set_features(sbi->s_journal, | |
4086 | compat, 0, | |
4087 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | | |
4088 | incompat); | |
4089 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { | |
4090 | ret = jbd2_journal_set_features(sbi->s_journal, | |
4091 | compat, 0, | |
4092 | incompat); | |
4093 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, | |
4094 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
4095 | } else { | |
feb8c6d3 DW |
4096 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
4097 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
25ed6e8a DW |
4098 | } |
4099 | ||
4100 | return ret; | |
4101 | } | |
4102 | ||
952fc18e TT |
4103 | /* |
4104 | * Note: calculating the overhead so we can be compatible with | |
4105 | * historical BSD practice is quite difficult in the face of | |
4106 | * clusters/bigalloc. This is because multiple metadata blocks from | |
4107 | * different block group can end up in the same allocation cluster. | |
4108 | * Calculating the exact overhead in the face of clustered allocation | |
4109 | * requires either O(all block bitmaps) in memory or O(number of block | |
4110 | * groups**2) in time. We will still calculate the superblock for | |
4111 | * older file systems --- and if we come across with a bigalloc file | |
4112 | * system with zero in s_overhead_clusters the estimate will be close to | |
4113 | * correct especially for very large cluster sizes --- but for newer | |
4114 | * file systems, it's better to calculate this figure once at mkfs | |
4115 | * time, and store it in the superblock. If the superblock value is | |
4116 | * present (even for non-bigalloc file systems), we will use it. | |
4117 | */ | |
4118 | static int count_overhead(struct super_block *sb, ext4_group_t grp, | |
4119 | char *buf) | |
4120 | { | |
4121 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4122 | struct ext4_group_desc *gdp; | |
4123 | ext4_fsblk_t first_block, last_block, b; | |
4124 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); | |
4125 | int s, j, count = 0; | |
10b01ee9 | 4126 | int has_super = ext4_bg_has_super(sb, grp); |
952fc18e | 4127 | |
e2b911c5 | 4128 | if (!ext4_has_feature_bigalloc(sb)) |
10b01ee9 TT |
4129 | return (has_super + ext4_bg_num_gdb(sb, grp) + |
4130 | (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + | |
0548bbb8 TT |
4131 | sbi->s_itb_per_group + 2); |
4132 | ||
952fc18e TT |
4133 | first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + |
4134 | (grp * EXT4_BLOCKS_PER_GROUP(sb)); | |
4135 | last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; | |
4136 | for (i = 0; i < ngroups; i++) { | |
4137 | gdp = ext4_get_group_desc(sb, i, NULL); | |
4138 | b = ext4_block_bitmap(sb, gdp); | |
4139 | if (b >= first_block && b <= last_block) { | |
4140 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
4141 | count++; | |
4142 | } | |
4143 | b = ext4_inode_bitmap(sb, gdp); | |
4144 | if (b >= first_block && b <= last_block) { | |
4145 | ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); | |
4146 | count++; | |
4147 | } | |
4148 | b = ext4_inode_table(sb, gdp); | |
4149 | if (b >= first_block && b + sbi->s_itb_per_group <= last_block) | |
4150 | for (j = 0; j < sbi->s_itb_per_group; j++, b++) { | |
4151 | int c = EXT4_B2C(sbi, b - first_block); | |
4152 | ext4_set_bit(c, buf); | |
4153 | count++; | |
4154 | } | |
4155 | if (i != grp) | |
4156 | continue; | |
4157 | s = 0; | |
4158 | if (ext4_bg_has_super(sb, grp)) { | |
4159 | ext4_set_bit(s++, buf); | |
4160 | count++; | |
4161 | } | |
c48ae41b TT |
4162 | j = ext4_bg_num_gdb(sb, grp); |
4163 | if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { | |
4164 | ext4_error(sb, "Invalid number of block group " | |
4165 | "descriptor blocks: %d", j); | |
4166 | j = EXT4_BLOCKS_PER_GROUP(sb) - s; | |
952fc18e | 4167 | } |
c48ae41b TT |
4168 | count += j; |
4169 | for (; j > 0; j--) | |
4170 | ext4_set_bit(EXT4_B2C(sbi, s++), buf); | |
952fc18e TT |
4171 | } |
4172 | if (!count) | |
4173 | return 0; | |
4174 | return EXT4_CLUSTERS_PER_GROUP(sb) - | |
4175 | ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); | |
4176 | } | |
4177 | ||
4178 | /* | |
4179 | * Compute the overhead and stash it in sbi->s_overhead | |
4180 | */ | |
4181 | int ext4_calculate_overhead(struct super_block *sb) | |
4182 | { | |
4183 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4184 | struct ext4_super_block *es = sbi->s_es; | |
3c816ded EW |
4185 | struct inode *j_inode; |
4186 | unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); | |
952fc18e TT |
4187 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
4188 | ext4_fsblk_t overhead = 0; | |
4fdb5543 | 4189 | char *buf = (char *) get_zeroed_page(GFP_NOFS); |
952fc18e | 4190 | |
952fc18e TT |
4191 | if (!buf) |
4192 | return -ENOMEM; | |
4193 | ||
4194 | /* | |
4195 | * Compute the overhead (FS structures). This is constant | |
4196 | * for a given filesystem unless the number of block groups | |
4197 | * changes so we cache the previous value until it does. | |
4198 | */ | |
4199 | ||
4200 | /* | |
4201 | * All of the blocks before first_data_block are overhead | |
4202 | */ | |
4203 | overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); | |
4204 | ||
4205 | /* | |
4206 | * Add the overhead found in each block group | |
4207 | */ | |
4208 | for (i = 0; i < ngroups; i++) { | |
4209 | int blks; | |
4210 | ||
4211 | blks = count_overhead(sb, i, buf); | |
4212 | overhead += blks; | |
4213 | if (blks) | |
4214 | memset(buf, 0, PAGE_SIZE); | |
4215 | cond_resched(); | |
4216 | } | |
3c816ded EW |
4217 | |
4218 | /* | |
4219 | * Add the internal journal blocks whether the journal has been | |
4220 | * loaded or not | |
4221 | */ | |
ee7ed3aa | 4222 | if (sbi->s_journal && !sbi->s_journal_bdev) |
ede7dc7f | 4223 | overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); |
f1eec3b0 RH |
4224 | else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { |
4225 | /* j_inum for internal journal is non-zero */ | |
3c816ded EW |
4226 | j_inode = ext4_get_journal_inode(sb, j_inum); |
4227 | if (j_inode) { | |
4228 | j_blocks = j_inode->i_size >> sb->s_blocksize_bits; | |
4229 | overhead += EXT4_NUM_B2C(sbi, j_blocks); | |
4230 | iput(j_inode); | |
4231 | } else { | |
4232 | ext4_msg(sb, KERN_ERR, "can't get journal size"); | |
4233 | } | |
4234 | } | |
952fc18e TT |
4235 | sbi->s_overhead = overhead; |
4236 | smp_wmb(); | |
4237 | free_page((unsigned long) buf); | |
4238 | return 0; | |
4239 | } | |
4240 | ||
b5799018 | 4241 | static void ext4_set_resv_clusters(struct super_block *sb) |
27dd4385 LC |
4242 | { |
4243 | ext4_fsblk_t resv_clusters; | |
b5799018 | 4244 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
27dd4385 | 4245 | |
30fac0f7 JK |
4246 | /* |
4247 | * There's no need to reserve anything when we aren't using extents. | |
4248 | * The space estimates are exact, there are no unwritten extents, | |
4249 | * hole punching doesn't need new metadata... This is needed especially | |
4250 | * to keep ext2/3 backward compatibility. | |
4251 | */ | |
e2b911c5 | 4252 | if (!ext4_has_feature_extents(sb)) |
b5799018 | 4253 | return; |
27dd4385 LC |
4254 | /* |
4255 | * By default we reserve 2% or 4096 clusters, whichever is smaller. | |
4256 | * This should cover the situations where we can not afford to run | |
4257 | * out of space like for example punch hole, or converting | |
556615dc | 4258 | * unwritten extents in delalloc path. In most cases such |
27dd4385 LC |
4259 | * allocation would require 1, or 2 blocks, higher numbers are |
4260 | * very rare. | |
4261 | */ | |
b5799018 TT |
4262 | resv_clusters = (ext4_blocks_count(sbi->s_es) >> |
4263 | sbi->s_cluster_bits); | |
27dd4385 LC |
4264 | |
4265 | do_div(resv_clusters, 50); | |
4266 | resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); | |
4267 | ||
b5799018 | 4268 | atomic64_set(&sbi->s_resv_clusters, resv_clusters); |
27dd4385 LC |
4269 | } |
4270 | ||
ca9b404f RA |
4271 | static const char *ext4_quota_mode(struct super_block *sb) |
4272 | { | |
4273 | #ifdef CONFIG_QUOTA | |
4274 | if (!ext4_quota_capable(sb)) | |
4275 | return "none"; | |
4276 | ||
4277 | if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) | |
4278 | return "journalled"; | |
4279 | else | |
4280 | return "writeback"; | |
4281 | #else | |
4282 | return "disabled"; | |
4283 | #endif | |
4284 | } | |
4285 | ||
188c299e JK |
4286 | static void ext4_setup_csum_trigger(struct super_block *sb, |
4287 | enum ext4_journal_trigger_type type, | |
4288 | void (*trigger)( | |
4289 | struct jbd2_buffer_trigger_type *type, | |
4290 | struct buffer_head *bh, | |
4291 | void *mapped_data, | |
4292 | size_t size)) | |
4293 | { | |
4294 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4295 | ||
4296 | sbi->s_journal_triggers[type].sb = sb; | |
4297 | sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; | |
4298 | } | |
4299 | ||
7edfd85b LC |
4300 | static void ext4_free_sbi(struct ext4_sb_info *sbi) |
4301 | { | |
4302 | if (!sbi) | |
4303 | return; | |
4304 | ||
4305 | kfree(sbi->s_blockgroup_lock); | |
8012b866 | 4306 | fs_put_dax(sbi->s_daxdev, NULL); |
7edfd85b LC |
4307 | kfree(sbi); |
4308 | } | |
4309 | ||
4310 | static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) | |
4311 | { | |
4312 | struct ext4_sb_info *sbi; | |
4313 | ||
4314 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
4315 | if (!sbi) | |
4316 | return NULL; | |
4317 | ||
8012b866 SR |
4318 | sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, |
4319 | NULL, NULL); | |
7edfd85b LC |
4320 | |
4321 | sbi->s_blockgroup_lock = | |
4322 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
4323 | ||
4324 | if (!sbi->s_blockgroup_lock) | |
4325 | goto err_out; | |
4326 | ||
4327 | sb->s_fs_info = sbi; | |
4328 | sbi->s_sb = sb; | |
4329 | return sbi; | |
4330 | err_out: | |
8012b866 | 4331 | fs_put_dax(sbi->s_daxdev, NULL); |
7edfd85b LC |
4332 | kfree(sbi); |
4333 | return NULL; | |
4334 | } | |
4335 | ||
5f6d662d JY |
4336 | static void ext4_set_def_opts(struct super_block *sb, |
4337 | struct ext4_super_block *es) | |
4338 | { | |
4339 | unsigned long def_mount_opts; | |
4340 | ||
4341 | /* Set defaults before we parse the mount options */ | |
4342 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
4343 | set_opt(sb, INIT_INODE_TABLE); | |
4344 | if (def_mount_opts & EXT4_DEFM_DEBUG) | |
4345 | set_opt(sb, DEBUG); | |
4346 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) | |
4347 | set_opt(sb, GRPID); | |
4348 | if (def_mount_opts & EXT4_DEFM_UID16) | |
4349 | set_opt(sb, NO_UID32); | |
4350 | /* xattr user namespace & acls are now defaulted on */ | |
4351 | set_opt(sb, XATTR_USER); | |
4352 | #ifdef CONFIG_EXT4_FS_POSIX_ACL | |
4353 | set_opt(sb, POSIX_ACL); | |
4354 | #endif | |
4355 | if (ext4_has_feature_fast_commit(sb)) | |
4356 | set_opt2(sb, JOURNAL_FAST_COMMIT); | |
4357 | /* don't forget to enable journal_csum when metadata_csum is enabled. */ | |
4358 | if (ext4_has_metadata_csum(sb)) | |
4359 | set_opt(sb, JOURNAL_CHECKSUM); | |
4360 | ||
4361 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) | |
4362 | set_opt(sb, JOURNAL_DATA); | |
4363 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) | |
4364 | set_opt(sb, ORDERED_DATA); | |
4365 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) | |
4366 | set_opt(sb, WRITEBACK_DATA); | |
4367 | ||
4368 | if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) | |
4369 | set_opt(sb, ERRORS_PANIC); | |
4370 | else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) | |
4371 | set_opt(sb, ERRORS_CONT); | |
4372 | else | |
4373 | set_opt(sb, ERRORS_RO); | |
4374 | /* block_validity enabled by default; disable with noblock_validity */ | |
4375 | set_opt(sb, BLOCK_VALIDITY); | |
4376 | if (def_mount_opts & EXT4_DEFM_DISCARD) | |
4377 | set_opt(sb, DISCARD); | |
4378 | ||
4379 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) | |
4380 | set_opt(sb, BARRIER); | |
4381 | ||
4382 | /* | |
4383 | * enable delayed allocation by default | |
4384 | * Use -o nodelalloc to turn it off | |
4385 | */ | |
4386 | if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && | |
4387 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
4388 | set_opt(sb, DELALLOC); | |
3df11e27 JY |
4389 | |
4390 | if (sb->s_blocksize == PAGE_SIZE) | |
4391 | set_opt(sb, DIOREAD_NOLOCK); | |
5f6d662d JY |
4392 | } |
4393 | ||
c8267c51 | 4394 | static int ext4_handle_clustersize(struct super_block *sb) |
4a8557b0 JY |
4395 | { |
4396 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4397 | struct ext4_super_block *es = sbi->s_es; | |
4398 | int clustersize; | |
4399 | ||
4400 | /* Handle clustersize */ | |
4401 | clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); | |
4402 | if (ext4_has_feature_bigalloc(sb)) { | |
c8267c51 | 4403 | if (clustersize < sb->s_blocksize) { |
4a8557b0 JY |
4404 | ext4_msg(sb, KERN_ERR, |
4405 | "cluster size (%d) smaller than " | |
c8267c51 | 4406 | "block size (%lu)", clustersize, sb->s_blocksize); |
4a8557b0 JY |
4407 | return -EINVAL; |
4408 | } | |
4409 | sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - | |
4410 | le32_to_cpu(es->s_log_block_size); | |
4411 | sbi->s_clusters_per_group = | |
4412 | le32_to_cpu(es->s_clusters_per_group); | |
c8267c51 | 4413 | if (sbi->s_clusters_per_group > sb->s_blocksize * 8) { |
4a8557b0 JY |
4414 | ext4_msg(sb, KERN_ERR, |
4415 | "#clusters per group too big: %lu", | |
4416 | sbi->s_clusters_per_group); | |
4417 | return -EINVAL; | |
4418 | } | |
4419 | if (sbi->s_blocks_per_group != | |
c8267c51 | 4420 | (sbi->s_clusters_per_group * (clustersize / sb->s_blocksize))) { |
4a8557b0 JY |
4421 | ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " |
4422 | "clusters per group (%lu) inconsistent", | |
4423 | sbi->s_blocks_per_group, | |
4424 | sbi->s_clusters_per_group); | |
4425 | return -EINVAL; | |
4426 | } | |
4427 | } else { | |
c8267c51 | 4428 | if (clustersize != sb->s_blocksize) { |
4a8557b0 JY |
4429 | ext4_msg(sb, KERN_ERR, |
4430 | "fragment/cluster size (%d) != " | |
c8267c51 | 4431 | "block size (%lu)", clustersize, sb->s_blocksize); |
4a8557b0 JY |
4432 | return -EINVAL; |
4433 | } | |
c8267c51 | 4434 | if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { |
4a8557b0 JY |
4435 | ext4_msg(sb, KERN_ERR, |
4436 | "#blocks per group too big: %lu", | |
4437 | sbi->s_blocks_per_group); | |
4438 | return -EINVAL; | |
4439 | } | |
4440 | sbi->s_clusters_per_group = sbi->s_blocks_per_group; | |
4441 | sbi->s_cluster_bits = 0; | |
4442 | } | |
c8267c51 | 4443 | sbi->s_cluster_ratio = clustersize / sb->s_blocksize; |
4a8557b0 JY |
4444 | |
4445 | /* Do we have standard group size of clustersize * 8 blocks ? */ | |
4446 | if (sbi->s_blocks_per_group == clustersize << 3) | |
4447 | set_opt2(sb, STD_GROUP_SIZE); | |
4448 | ||
4449 | return 0; | |
4450 | } | |
4451 | ||
f7314a67 JY |
4452 | static void ext4_fast_commit_init(struct super_block *sb) |
4453 | { | |
4454 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4455 | ||
4456 | /* Initialize fast commit stuff */ | |
4457 | atomic_set(&sbi->s_fc_subtid, 0); | |
4458 | INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); | |
4459 | INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); | |
4460 | INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); | |
4461 | INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); | |
4462 | sbi->s_fc_bytes = 0; | |
4463 | ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); | |
4464 | sbi->s_fc_ineligible_tid = 0; | |
4465 | spin_lock_init(&sbi->s_fc_lock); | |
4466 | memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); | |
4467 | sbi->s_fc_replay_state.fc_regions = NULL; | |
4468 | sbi->s_fc_replay_state.fc_regions_size = 0; | |
4469 | sbi->s_fc_replay_state.fc_regions_used = 0; | |
4470 | sbi->s_fc_replay_state.fc_regions_valid = 0; | |
4471 | sbi->s_fc_replay_state.fc_modified_inodes = NULL; | |
4472 | sbi->s_fc_replay_state.fc_modified_inodes_size = 0; | |
4473 | sbi->s_fc_replay_state.fc_modified_inodes_used = 0; | |
4474 | } | |
4475 | ||
0e495f7c | 4476 | static int ext4_inode_info_init(struct super_block *sb, |
c8267c51 | 4477 | struct ext4_super_block *es) |
0e495f7c JY |
4478 | { |
4479 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4480 | ||
4481 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { | |
4482 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
4483 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
4484 | } else { | |
4485 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
4486 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
4487 | if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { | |
4488 | ext4_msg(sb, KERN_ERR, "invalid first ino: %u", | |
4489 | sbi->s_first_ino); | |
4490 | return -EINVAL; | |
4491 | } | |
4492 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || | |
4493 | (!is_power_of_2(sbi->s_inode_size)) || | |
c8267c51 | 4494 | (sbi->s_inode_size > sb->s_blocksize)) { |
0e495f7c JY |
4495 | ext4_msg(sb, KERN_ERR, |
4496 | "unsupported inode size: %d", | |
4497 | sbi->s_inode_size); | |
c8267c51 | 4498 | ext4_msg(sb, KERN_ERR, "blocksize: %lu", sb->s_blocksize); |
0e495f7c JY |
4499 | return -EINVAL; |
4500 | } | |
4501 | /* | |
4502 | * i_atime_extra is the last extra field available for | |
4503 | * [acm]times in struct ext4_inode. Checking for that | |
4504 | * field should suffice to ensure we have extra space | |
4505 | * for all three. | |
4506 | */ | |
4507 | if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + | |
4508 | sizeof(((struct ext4_inode *)0)->i_atime_extra)) { | |
4509 | sb->s_time_gran = 1; | |
4510 | sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; | |
4511 | } else { | |
4512 | sb->s_time_gran = NSEC_PER_SEC; | |
4513 | sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; | |
4514 | } | |
4515 | sb->s_time_min = EXT4_TIMESTAMP_MIN; | |
4516 | } | |
4517 | ||
4518 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
4519 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
4520 | EXT4_GOOD_OLD_INODE_SIZE; | |
4521 | if (ext4_has_feature_extra_isize(sb)) { | |
4522 | unsigned v, max = (sbi->s_inode_size - | |
4523 | EXT4_GOOD_OLD_INODE_SIZE); | |
4524 | ||
4525 | v = le16_to_cpu(es->s_want_extra_isize); | |
4526 | if (v > max) { | |
4527 | ext4_msg(sb, KERN_ERR, | |
4528 | "bad s_want_extra_isize: %d", v); | |
4529 | return -EINVAL; | |
4530 | } | |
4531 | if (sbi->s_want_extra_isize < v) | |
4532 | sbi->s_want_extra_isize = v; | |
4533 | ||
4534 | v = le16_to_cpu(es->s_min_extra_isize); | |
4535 | if (v > max) { | |
4536 | ext4_msg(sb, KERN_ERR, | |
4537 | "bad s_min_extra_isize: %d", v); | |
4538 | return -EINVAL; | |
4539 | } | |
4540 | if (sbi->s_want_extra_isize < v) | |
4541 | sbi->s_want_extra_isize = v; | |
4542 | } | |
4543 | } | |
4544 | ||
4545 | return 0; | |
4546 | } | |
4547 | ||
39c135b0 JY |
4548 | #if IS_ENABLED(CONFIG_UNICODE) |
4549 | static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) | |
4550 | { | |
4551 | const struct ext4_sb_encodings *encoding_info; | |
4552 | struct unicode_map *encoding; | |
4553 | __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); | |
4554 | ||
4555 | if (!ext4_has_feature_casefold(sb) || sb->s_encoding) | |
4556 | return 0; | |
4557 | ||
4558 | encoding_info = ext4_sb_read_encoding(es); | |
4559 | if (!encoding_info) { | |
4560 | ext4_msg(sb, KERN_ERR, | |
4561 | "Encoding requested by superblock is unknown"); | |
4562 | return -EINVAL; | |
4563 | } | |
4564 | ||
4565 | encoding = utf8_load(encoding_info->version); | |
4566 | if (IS_ERR(encoding)) { | |
4567 | ext4_msg(sb, KERN_ERR, | |
4568 | "can't mount with superblock charset: %s-%u.%u.%u " | |
4569 | "not supported by the kernel. flags: 0x%x.", | |
4570 | encoding_info->name, | |
4571 | unicode_major(encoding_info->version), | |
4572 | unicode_minor(encoding_info->version), | |
4573 | unicode_rev(encoding_info->version), | |
4574 | encoding_flags); | |
4575 | return -EINVAL; | |
4576 | } | |
4577 | ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " | |
4578 | "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, | |
4579 | unicode_major(encoding_info->version), | |
4580 | unicode_minor(encoding_info->version), | |
4581 | unicode_rev(encoding_info->version), | |
4582 | encoding_flags); | |
4583 | ||
4584 | sb->s_encoding = encoding; | |
4585 | sb->s_encoding_flags = encoding_flags; | |
4586 | ||
4587 | return 0; | |
4588 | } | |
4589 | #else | |
4590 | static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) | |
4591 | { | |
4592 | return 0; | |
4593 | } | |
4594 | #endif | |
4595 | ||
b26458d1 JY |
4596 | static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) |
4597 | { | |
4598 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4599 | ||
4600 | /* Warn if metadata_csum and gdt_csum are both set. */ | |
4601 | if (ext4_has_feature_metadata_csum(sb) && | |
4602 | ext4_has_feature_gdt_csum(sb)) | |
4603 | ext4_warning(sb, "metadata_csum and uninit_bg are " | |
4604 | "redundant flags; please run fsck."); | |
4605 | ||
4606 | /* Check for a known checksum algorithm */ | |
4607 | if (!ext4_verify_csum_type(sb, es)) { | |
4608 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
4609 | "unknown checksum algorithm."); | |
4610 | return -EINVAL; | |
4611 | } | |
4612 | ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, | |
4613 | ext4_orphan_file_block_trigger); | |
4614 | ||
4615 | /* Load the checksum driver */ | |
4616 | sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); | |
4617 | if (IS_ERR(sbi->s_chksum_driver)) { | |
4618 | int ret = PTR_ERR(sbi->s_chksum_driver); | |
4619 | ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); | |
4620 | sbi->s_chksum_driver = NULL; | |
4621 | return ret; | |
4622 | } | |
4623 | ||
4624 | /* Check superblock checksum */ | |
4625 | if (!ext4_superblock_csum_verify(sb, es)) { | |
4626 | ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " | |
4627 | "invalid superblock checksum. Run e2fsck?"); | |
4628 | return -EFSBADCRC; | |
4629 | } | |
4630 | ||
4631 | /* Precompute checksum seed for all metadata */ | |
4632 | if (ext4_has_feature_csum_seed(sb)) | |
4633 | sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); | |
4634 | else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) | |
4635 | sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, | |
4636 | sizeof(es->s_uuid)); | |
4637 | return 0; | |
4638 | } | |
4639 | ||
d7f3542b JY |
4640 | static int ext4_check_feature_compatibility(struct super_block *sb, |
4641 | struct ext4_super_block *es, | |
4642 | int silent) | |
4643 | { | |
54902099 JY |
4644 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4645 | ||
d7f3542b JY |
4646 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
4647 | (ext4_has_compat_features(sb) || | |
4648 | ext4_has_ro_compat_features(sb) || | |
4649 | ext4_has_incompat_features(sb))) | |
4650 | ext4_msg(sb, KERN_WARNING, | |
4651 | "feature flags set on rev 0 fs, " | |
4652 | "running e2fsck is recommended"); | |
4653 | ||
4654 | if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { | |
4655 | set_opt2(sb, HURD_COMPAT); | |
4656 | if (ext4_has_feature_64bit(sb)) { | |
4657 | ext4_msg(sb, KERN_ERR, | |
4658 | "The Hurd can't support 64-bit file systems"); | |
4659 | return -EINVAL; | |
4660 | } | |
4661 | ||
4662 | /* | |
4663 | * ea_inode feature uses l_i_version field which is not | |
4664 | * available in HURD_COMPAT mode. | |
4665 | */ | |
4666 | if (ext4_has_feature_ea_inode(sb)) { | |
4667 | ext4_msg(sb, KERN_ERR, | |
4668 | "ea_inode feature is not supported for Hurd"); | |
4669 | return -EINVAL; | |
4670 | } | |
4671 | } | |
4672 | ||
4673 | if (IS_EXT2_SB(sb)) { | |
4674 | if (ext2_feature_set_ok(sb)) | |
4675 | ext4_msg(sb, KERN_INFO, "mounting ext2 file system " | |
4676 | "using the ext4 subsystem"); | |
4677 | else { | |
4678 | /* | |
4679 | * If we're probing be silent, if this looks like | |
4680 | * it's actually an ext[34] filesystem. | |
4681 | */ | |
4682 | if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) | |
4683 | return -EINVAL; | |
4684 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " | |
4685 | "to feature incompatibilities"); | |
4686 | return -EINVAL; | |
4687 | } | |
4688 | } | |
4689 | ||
4690 | if (IS_EXT3_SB(sb)) { | |
4691 | if (ext3_feature_set_ok(sb)) | |
4692 | ext4_msg(sb, KERN_INFO, "mounting ext3 file system " | |
4693 | "using the ext4 subsystem"); | |
4694 | else { | |
4695 | /* | |
4696 | * If we're probing be silent, if this looks like | |
4697 | * it's actually an ext4 filesystem. | |
4698 | */ | |
4699 | if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) | |
4700 | return -EINVAL; | |
4701 | ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " | |
4702 | "to feature incompatibilities"); | |
4703 | return -EINVAL; | |
4704 | } | |
4705 | } | |
4706 | ||
4707 | /* | |
4708 | * Check feature flags regardless of the revision level, since we | |
4709 | * previously didn't change the revision level when setting the flags, | |
4710 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
4711 | */ | |
4712 | if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) | |
4713 | return -EINVAL; | |
4714 | ||
54902099 JY |
4715 | if (sbi->s_daxdev) { |
4716 | if (sb->s_blocksize == PAGE_SIZE) | |
4717 | set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); | |
4718 | else | |
4719 | ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); | |
4720 | } | |
4721 | ||
4722 | if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { | |
4723 | if (ext4_has_feature_inline_data(sb)) { | |
4724 | ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" | |
4725 | " that may contain inline data"); | |
4726 | return -EINVAL; | |
4727 | } | |
4728 | if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { | |
4729 | ext4_msg(sb, KERN_ERR, | |
4730 | "DAX unsupported by block device."); | |
4731 | return -EINVAL; | |
4732 | } | |
4733 | } | |
4734 | ||
4735 | if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { | |
4736 | ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", | |
4737 | es->s_encryption_level); | |
4738 | return -EINVAL; | |
4739 | } | |
4740 | ||
d7f3542b JY |
4741 | return 0; |
4742 | } | |
4743 | ||
68e62439 | 4744 | static int ext4_check_geometry(struct super_block *sb, |
bc62dbf9 JY |
4745 | struct ext4_super_block *es) |
4746 | { | |
4747 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4748 | __u64 blocks_count; | |
269e9226 JY |
4749 | int err; |
4750 | ||
4751 | if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (sb->s_blocksize / 4)) { | |
4752 | ext4_msg(sb, KERN_ERR, | |
4753 | "Number of reserved GDT blocks insanely large: %d", | |
4754 | le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); | |
4755 | return -EINVAL; | |
4756 | } | |
4757 | /* | |
4758 | * Test whether we have more sectors than will fit in sector_t, | |
4759 | * and whether the max offset is addressable by the page cache. | |
4760 | */ | |
4761 | err = generic_check_addressable(sb->s_blocksize_bits, | |
4762 | ext4_blocks_count(es)); | |
4763 | if (err) { | |
4764 | ext4_msg(sb, KERN_ERR, "filesystem" | |
4765 | " too large to mount safely on this system"); | |
4766 | return err; | |
4767 | } | |
bc62dbf9 JY |
4768 | |
4769 | /* check blocks count against device size */ | |
4770 | blocks_count = sb_bdev_nr_blocks(sb); | |
4771 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
4772 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " | |
4773 | "exceeds size of device (%llu blocks)", | |
4774 | ext4_blocks_count(es), blocks_count); | |
4775 | return -EINVAL; | |
4776 | } | |
4777 | ||
4778 | /* | |
4779 | * It makes no sense for the first data block to be beyond the end | |
4780 | * of the filesystem. | |
4781 | */ | |
4782 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
4783 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " | |
4784 | "block %u is beyond end of filesystem (%llu)", | |
4785 | le32_to_cpu(es->s_first_data_block), | |
4786 | ext4_blocks_count(es)); | |
4787 | return -EINVAL; | |
4788 | } | |
4789 | if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && | |
4790 | (sbi->s_cluster_ratio == 1)) { | |
4791 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data " | |
4792 | "block is 0 with a 1k block and cluster size"); | |
4793 | return -EINVAL; | |
4794 | } | |
4795 | ||
4796 | blocks_count = (ext4_blocks_count(es) - | |
4797 | le32_to_cpu(es->s_first_data_block) + | |
4798 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
4799 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4800 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { | |
4801 | ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " | |
4802 | "(block count %llu, first data block %u, " | |
4803 | "blocks per group %lu)", blocks_count, | |
4804 | ext4_blocks_count(es), | |
4805 | le32_to_cpu(es->s_first_data_block), | |
4806 | EXT4_BLOCKS_PER_GROUP(sb)); | |
4807 | return -EINVAL; | |
4808 | } | |
4809 | sbi->s_groups_count = blocks_count; | |
4810 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, | |
4811 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
4812 | if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != | |
4813 | le32_to_cpu(es->s_inodes_count)) { | |
4814 | ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", | |
4815 | le32_to_cpu(es->s_inodes_count), | |
4816 | ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); | |
4817 | return -EINVAL; | |
4818 | } | |
4819 | ||
4820 | return 0; | |
4821 | } | |
4822 | ||
a4e6a511 JY |
4823 | static int ext4_group_desc_init(struct super_block *sb, |
4824 | struct ext4_super_block *es, | |
4825 | ext4_fsblk_t logical_sb_block, | |
4826 | ext4_group_t *first_not_zeroed) | |
4827 | { | |
4828 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4829 | unsigned int db_count; | |
4830 | ext4_fsblk_t block; | |
a4e6a511 JY |
4831 | int i; |
4832 | ||
4833 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / | |
4834 | EXT4_DESC_PER_BLOCK(sb); | |
4835 | if (ext4_has_feature_meta_bg(sb)) { | |
4836 | if (le32_to_cpu(es->s_first_meta_bg) > db_count) { | |
4837 | ext4_msg(sb, KERN_WARNING, | |
4838 | "first meta block group too large: %u " | |
4839 | "(group descriptor block count %u)", | |
4840 | le32_to_cpu(es->s_first_meta_bg), db_count); | |
4841 | return -EINVAL; | |
4842 | } | |
4843 | } | |
4844 | rcu_assign_pointer(sbi->s_group_desc, | |
4845 | kvmalloc_array(db_count, | |
4846 | sizeof(struct buffer_head *), | |
4847 | GFP_KERNEL)); | |
4848 | if (sbi->s_group_desc == NULL) { | |
4849 | ext4_msg(sb, KERN_ERR, "not enough memory"); | |
4850 | return -ENOMEM; | |
4851 | } | |
4852 | ||
4853 | bgl_lock_init(sbi->s_blockgroup_lock); | |
4854 | ||
4855 | /* Pre-read the descriptors into the buffer cache */ | |
4856 | for (i = 0; i < db_count; i++) { | |
4857 | block = descriptor_loc(sb, logical_sb_block, i); | |
4858 | ext4_sb_breadahead_unmovable(sb, block); | |
4859 | } | |
4860 | ||
4861 | for (i = 0; i < db_count; i++) { | |
4862 | struct buffer_head *bh; | |
4863 | ||
4864 | block = descriptor_loc(sb, logical_sb_block, i); | |
4865 | bh = ext4_sb_bread_unmovable(sb, block); | |
4866 | if (IS_ERR(bh)) { | |
4867 | ext4_msg(sb, KERN_ERR, | |
4868 | "can't read group descriptor %d", i); | |
4869 | sbi->s_gdb_count = i; | |
172e344e | 4870 | return PTR_ERR(bh); |
a4e6a511 JY |
4871 | } |
4872 | rcu_read_lock(); | |
4873 | rcu_dereference(sbi->s_group_desc)[i] = bh; | |
4874 | rcu_read_unlock(); | |
4875 | } | |
4876 | sbi->s_gdb_count = db_count; | |
4877 | if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { | |
4878 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); | |
172e344e | 4879 | return -EFSCORRUPTED; |
a4e6a511 | 4880 | } |
172e344e | 4881 | |
a4e6a511 | 4882 | return 0; |
a4e6a511 JY |
4883 | } |
4884 | ||
9c1dd22d JY |
4885 | static int ext4_load_and_init_journal(struct super_block *sb, |
4886 | struct ext4_super_block *es, | |
4887 | struct ext4_fs_context *ctx) | |
4888 | { | |
4889 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
4890 | int err; | |
4891 | ||
4892 | err = ext4_load_journal(sb, es, ctx->journal_devnum); | |
4893 | if (err) | |
4894 | return err; | |
4895 | ||
4896 | if (ext4_has_feature_64bit(sb) && | |
4897 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
4898 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
4899 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); | |
4900 | goto out; | |
4901 | } | |
4902 | ||
4903 | if (!set_journal_csum_feature_set(sb)) { | |
4904 | ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " | |
4905 | "feature set"); | |
4906 | goto out; | |
4907 | } | |
4908 | ||
4909 | if (test_opt2(sb, JOURNAL_FAST_COMMIT) && | |
4910 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
4911 | JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { | |
4912 | ext4_msg(sb, KERN_ERR, | |
4913 | "Failed to set fast commit journal feature"); | |
4914 | goto out; | |
4915 | } | |
4916 | ||
4917 | /* We have now updated the journal if required, so we can | |
4918 | * validate the data journaling mode. */ | |
4919 | switch (test_opt(sb, DATA_FLAGS)) { | |
4920 | case 0: | |
4921 | /* No mode set, assume a default based on the journal | |
4922 | * capabilities: ORDERED_DATA if the journal can | |
4923 | * cope, else JOURNAL_DATA | |
4924 | */ | |
4925 | if (jbd2_journal_check_available_features | |
4926 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
4927 | set_opt(sb, ORDERED_DATA); | |
4928 | sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; | |
4929 | } else { | |
4930 | set_opt(sb, JOURNAL_DATA); | |
4931 | sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; | |
4932 | } | |
4933 | break; | |
4934 | ||
4935 | case EXT4_MOUNT_ORDERED_DATA: | |
4936 | case EXT4_MOUNT_WRITEBACK_DATA: | |
4937 | if (!jbd2_journal_check_available_features | |
4938 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
4939 | ext4_msg(sb, KERN_ERR, "Journal does not support " | |
4940 | "requested data journaling mode"); | |
4941 | goto out; | |
4942 | } | |
4943 | break; | |
4944 | default: | |
4945 | break; | |
4946 | } | |
4947 | ||
4948 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && | |
4949 | test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
4950 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4951 | "journal_async_commit in data=ordered mode"); | |
4952 | goto out; | |
4953 | } | |
4954 | ||
4955 | set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); | |
4956 | ||
4957 | sbi->s_journal->j_submit_inode_data_buffers = | |
4958 | ext4_journal_submit_inode_data_buffers; | |
4959 | sbi->s_journal->j_finish_inode_data_buffers = | |
4960 | ext4_journal_finish_inode_data_buffers; | |
4961 | ||
4962 | return 0; | |
4963 | ||
4964 | out: | |
4965 | /* flush s_error_work before journal destroy. */ | |
4966 | flush_work(&sbi->s_error_work); | |
4967 | jbd2_journal_destroy(sbi->s_journal); | |
4968 | sbi->s_journal = NULL; | |
9f2a1d9f | 4969 | return -EINVAL; |
9c1dd22d JY |
4970 | } |
4971 | ||
68e62439 | 4972 | static int ext4_check_journal_data_mode(struct super_block *sb) |
a5991e53 JY |
4973 | { |
4974 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
4975 | printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with " | |
4976 | "data=journal disables delayed allocation, " | |
4977 | "dioread_nolock, O_DIRECT and fast_commit support!\n"); | |
4978 | /* can't mount with both data=journal and dioread_nolock. */ | |
4979 | clear_opt(sb, DIOREAD_NOLOCK); | |
4980 | clear_opt2(sb, JOURNAL_FAST_COMMIT); | |
4981 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
4982 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4983 | "both data=journal and delalloc"); | |
4984 | return -EINVAL; | |
4985 | } | |
4986 | if (test_opt(sb, DAX_ALWAYS)) { | |
4987 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
4988 | "both data=journal and dax"); | |
4989 | return -EINVAL; | |
4990 | } | |
4991 | if (ext4_has_feature_encrypt(sb)) { | |
4992 | ext4_msg(sb, KERN_WARNING, | |
4993 | "encrypted files will use data=ordered " | |
4994 | "instead of data journaling mode"); | |
4995 | } | |
4996 | if (test_opt(sb, DELALLOC)) | |
4997 | clear_opt(sb, DELALLOC); | |
4998 | } else { | |
4999 | sb->s_iflags |= SB_I_CGROUPWB; | |
5000 | } | |
5001 | ||
5002 | return 0; | |
5003 | } | |
5004 | ||
a7a79c29 JY |
5005 | static int ext4_load_super(struct super_block *sb, ext4_fsblk_t *lsb, |
5006 | int silent) | |
ac27a0ec | 5007 | { |
7edfd85b | 5008 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
a7a79c29 | 5009 | struct ext4_super_block *es; |
70bbb3e0 | 5010 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 5011 | unsigned long offset = 0; |
a7a79c29 JY |
5012 | struct buffer_head *bh; |
5013 | int ret = -EINVAL; | |
4a8557b0 | 5014 | int blocksize; |
705895b6 | 5015 | |
617ba13b | 5016 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 5017 | if (!blocksize) { |
b31e1552 | 5018 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
a7a79c29 | 5019 | return -EINVAL; |
ac27a0ec DK |
5020 | } |
5021 | ||
5022 | /* | |
617ba13b | 5023 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
5024 | * block sizes. We need to calculate the offset from buffer start. |
5025 | */ | |
617ba13b | 5026 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
7edfd85b | 5027 | logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; |
70bbb3e0 | 5028 | offset = do_div(logical_sb_block, blocksize); |
ac27a0ec | 5029 | } else { |
7edfd85b | 5030 | logical_sb_block = sbi->s_sb_block; |
ac27a0ec DK |
5031 | } |
5032 | ||
8394a6ab | 5033 | bh = ext4_sb_bread_unmovable(sb, logical_sb_block); |
5034 | if (IS_ERR(bh)) { | |
b31e1552 | 5035 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
a7a79c29 | 5036 | return PTR_ERR(bh); |
ac27a0ec DK |
5037 | } |
5038 | /* | |
5039 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 5040 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 5041 | */ |
2716b802 | 5042 | es = (struct ext4_super_block *) (bh->b_data + offset); |
ac27a0ec DK |
5043 | sbi->s_es = es; |
5044 | sb->s_magic = le16_to_cpu(es->s_magic); | |
a5fc5119 JY |
5045 | if (sb->s_magic != EXT4_SUPER_MAGIC) { |
5046 | if (!silent) | |
5047 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); | |
a7a79c29 | 5048 | goto out; |
a5fc5119 JY |
5049 | } |
5050 | ||
a7a79c29 JY |
5051 | if (le32_to_cpu(es->s_log_block_size) > |
5052 | (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
5053 | ext4_msg(sb, KERN_ERR, | |
5054 | "Invalid log block size: %u", | |
5055 | le32_to_cpu(es->s_log_block_size)); | |
5056 | goto out; | |
5057 | } | |
5058 | if (le32_to_cpu(es->s_log_cluster_size) > | |
5059 | (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { | |
5060 | ext4_msg(sb, KERN_ERR, | |
5061 | "Invalid log cluster size: %u", | |
5062 | le32_to_cpu(es->s_log_cluster_size)); | |
5063 | goto out; | |
5064 | } | |
5065 | ||
5066 | blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); | |
5067 | ||
5068 | /* | |
5069 | * If the default block size is not the same as the real block size, | |
5070 | * we need to reload it. | |
5071 | */ | |
5072 | if (sb->s_blocksize == blocksize) { | |
5073 | *lsb = logical_sb_block; | |
5074 | sbi->s_sbh = bh; | |
5075 | return 0; | |
5076 | } | |
5077 | ||
5078 | /* | |
5079 | * bh must be released before kill_bdev(), otherwise | |
5080 | * it won't be freed and its page also. kill_bdev() | |
5081 | * is called by sb_set_blocksize(). | |
5082 | */ | |
5083 | brelse(bh); | |
5084 | /* Validate the filesystem blocksize */ | |
5085 | if (!sb_set_blocksize(sb, blocksize)) { | |
5086 | ext4_msg(sb, KERN_ERR, "bad block size %d", | |
5087 | blocksize); | |
5088 | bh = NULL; | |
5089 | goto out; | |
5090 | } | |
5091 | ||
5092 | logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; | |
5093 | offset = do_div(logical_sb_block, blocksize); | |
5094 | bh = ext4_sb_bread_unmovable(sb, logical_sb_block); | |
5095 | if (IS_ERR(bh)) { | |
5096 | ext4_msg(sb, KERN_ERR, "Can't read superblock on 2nd try"); | |
5097 | ret = PTR_ERR(bh); | |
5098 | bh = NULL; | |
5099 | goto out; | |
5100 | } | |
5101 | es = (struct ext4_super_block *)(bh->b_data + offset); | |
5102 | sbi->s_es = es; | |
5103 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { | |
5104 | ext4_msg(sb, KERN_ERR, "Magic mismatch, very weird!"); | |
5105 | goto out; | |
5106 | } | |
5107 | *lsb = logical_sb_block; | |
5108 | sbi->s_sbh = bh; | |
5109 | return 0; | |
5110 | out: | |
5111 | brelse(bh); | |
5112 | return ret; | |
5113 | } | |
5114 | ||
db9345d9 JY |
5115 | static void ext4_hash_info_init(struct super_block *sb) |
5116 | { | |
5117 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5118 | struct ext4_super_block *es = sbi->s_es; | |
5119 | unsigned int i; | |
5120 | ||
5121 | for (i = 0; i < 4; i++) | |
5122 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); | |
5123 | ||
5124 | sbi->s_def_hash_version = es->s_def_hash_version; | |
5125 | if (ext4_has_feature_dir_index(sb)) { | |
5126 | i = le32_to_cpu(es->s_flags); | |
5127 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
5128 | sbi->s_hash_unsigned = 3; | |
5129 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
5130 | #ifdef __CHAR_UNSIGNED__ | |
5131 | if (!sb_rdonly(sb)) | |
5132 | es->s_flags |= | |
5133 | cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
5134 | sbi->s_hash_unsigned = 3; | |
5135 | #else | |
5136 | if (!sb_rdonly(sb)) | |
5137 | es->s_flags |= | |
5138 | cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
5139 | #endif | |
5140 | } | |
5141 | } | |
5142 | } | |
5143 | ||
107d2be9 JY |
5144 | static int ext4_block_group_meta_init(struct super_block *sb, int silent) |
5145 | { | |
5146 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
5147 | struct ext4_super_block *es = sbi->s_es; | |
5148 | int has_huge_files; | |
5149 | ||
5150 | has_huge_files = ext4_has_feature_huge_file(sb); | |
5151 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, | |
5152 | has_huge_files); | |
5153 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
5154 | ||
5155 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); | |
5156 | if (ext4_has_feature_64bit(sb)) { | |
5157 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || | |
5158 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || | |
5159 | !is_power_of_2(sbi->s_desc_size)) { | |
5160 | ext4_msg(sb, KERN_ERR, | |
5161 | "unsupported descriptor size %lu", | |
5162 | sbi->s_desc_size); | |
5163 | return -EINVAL; | |
5164 | } | |
5165 | } else | |
5166 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
5167 | ||
5168 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); | |
5169 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); | |
5170 | ||
5171 | sbi->s_inodes_per_block = sb->s_blocksize / EXT4_INODE_SIZE(sb); | |
5172 | if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { | |
5173 | if (!silent) | |
5174 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); | |
5175 | return -EINVAL; | |
5176 | } | |
5177 | if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || | |
5178 | sbi->s_inodes_per_group > sb->s_blocksize * 8) { | |
5179 | ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", | |
5180 | sbi->s_inodes_per_group); | |
5181 | return -EINVAL; | |
5182 | } | |
5183 | sbi->s_itb_per_group = sbi->s_inodes_per_group / | |
5184 | sbi->s_inodes_per_block; | |
5185 | sbi->s_desc_per_block = sb->s_blocksize / EXT4_DESC_SIZE(sb); | |
5186 | sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; | |
5187 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); | |
5188 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
5189 | ||
5190 | return 0; | |
5191 | } | |
5192 | ||
a7a79c29 JY |
5193 | static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) |
5194 | { | |
5195 | struct ext4_super_block *es = NULL; | |
5196 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
a7a79c29 JY |
5197 | ext4_fsblk_t logical_sb_block; |
5198 | struct inode *root; | |
5199 | int ret = -ENOMEM; | |
107d2be9 | 5200 | int needs_recovery; |
a7a79c29 JY |
5201 | int err = 0; |
5202 | ext4_group_t first_not_zeroed; | |
5203 | struct ext4_fs_context *ctx = fc->fs_private; | |
5204 | int silent = fc->sb_flags & SB_SILENT; | |
5205 | ||
5206 | /* Set defaults for the variables that will be set during parsing */ | |
5207 | if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) | |
5208 | ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; | |
5209 | ||
5210 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; | |
5211 | sbi->s_sectors_written_start = | |
5212 | part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); | |
5213 | ||
5214 | /* -EINVAL is default */ | |
5215 | ret = -EINVAL; | |
5216 | err = ext4_load_super(sb, &logical_sb_block, silent); | |
5217 | if (err) | |
5218 | goto out_fail; | |
5219 | ||
5220 | es = sbi->s_es; | |
afc32f7e | 5221 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec | 5222 | |
b26458d1 JY |
5223 | err = ext4_init_metadata_csum(sb, es); |
5224 | if (err) | |
a5fc5119 | 5225 | goto failed_mount; |
a9c47317 | 5226 | |
5f6d662d | 5227 | ext4_set_def_opts(sb, es); |
ac27a0ec | 5228 | |
08cefc7a EB |
5229 | sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); |
5230 | sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); | |
30773840 TT |
5231 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
5232 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
5233 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 5234 | |
51ce6511 LC |
5235 | /* |
5236 | * set default s_li_wait_mult for lazyinit, for the case there is | |
5237 | * no mount option specified. | |
5238 | */ | |
5239 | sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; | |
5240 | ||
c8267c51 | 5241 | if (ext4_inode_info_init(sb, es)) |
0e495f7c | 5242 | goto failed_mount; |
9803387c | 5243 | |
7edfd85b LC |
5244 | err = parse_apply_sb_mount_options(sb, ctx); |
5245 | if (err < 0) | |
5246 | goto failed_mount; | |
5247 | ||
5a916be1 | 5248 | sbi->s_def_mount_opt = sbi->s_mount_opt; |
e3645d72 | 5249 | sbi->s_def_mount_opt2 = sbi->s_mount_opt2; |
7edfd85b LC |
5250 | |
5251 | err = ext4_check_opt_consistency(fc, sb); | |
5252 | if (err < 0) | |
5253 | goto failed_mount; | |
5254 | ||
85456054 | 5255 | ext4_apply_options(fc, sb); |
ac27a0ec | 5256 | |
39c135b0 JY |
5257 | if (ext4_encoding_init(sb, es)) |
5258 | goto failed_mount; | |
c83ad55e | 5259 | |
68e62439 | 5260 | if (ext4_check_journal_data_mode(sb)) |
a5991e53 | 5261 | goto failed_mount; |
56889787 | 5262 | |
1751e8a6 LT |
5263 | sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | |
5264 | (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); | |
ac27a0ec | 5265 | |
1ff20307 JL |
5266 | /* i_version is always enabled now */ |
5267 | sb->s_flags |= SB_I_VERSION; | |
5268 | ||
d7f3542b | 5269 | if (ext4_check_feature_compatibility(sb, es, silent)) |
ac27a0ec | 5270 | goto failed_mount; |
a13fb1a4 | 5271 | |
107d2be9 | 5272 | if (ext4_block_group_meta_init(sb, silent)) |
a5fc5119 | 5273 | goto failed_mount; |
0b8e58a1 | 5274 | |
db9345d9 | 5275 | ext4_hash_info_init(sb); |
ac27a0ec | 5276 | |
c8267c51 | 5277 | if (ext4_handle_clustersize(sb)) |
4a8557b0 | 5278 | goto failed_mount; |
960fd856 | 5279 | |
68e62439 | 5280 | if (ext4_check_geometry(sb, es)) |
0f2ddca6 | 5281 | goto failed_mount; |
0f2ddca6 | 5282 | |
235699a8 | 5283 | timer_setup(&sbi->s_err_report, print_daily_error_info, 0); |
c92dc856 JK |
5284 | spin_lock_init(&sbi->s_error_lock); |
5285 | INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); | |
04496411 | 5286 | |
172e344e YB |
5287 | err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); |
5288 | if (err) | |
5289 | goto failed_mount3; | |
5290 | ||
a75ae78f | 5291 | /* Register extent status tree shrinker */ |
eb68d0e2 | 5292 | if (ext4_es_register_shrinker(sbi)) |
ce7e010a | 5293 | goto failed_mount3; |
ce7e010a | 5294 | |
c9de560d | 5295 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
67a5da56 | 5296 | sbi->s_extent_max_zeroout_kb = 32; |
c9de560d | 5297 | |
f9ae9cf5 TT |
5298 | /* |
5299 | * set up enough so that it can read an inode | |
5300 | */ | |
f6e63f90 | 5301 | sb->s_op = &ext4_sops; |
617ba13b MC |
5302 | sb->s_export_op = &ext4_export_ops; |
5303 | sb->s_xattr = ext4_xattr_handlers; | |
643fa961 | 5304 | #ifdef CONFIG_FS_ENCRYPTION |
a7550b30 | 5305 | sb->s_cop = &ext4_cryptops; |
ffcc4182 | 5306 | #endif |
c93d8f88 EB |
5307 | #ifdef CONFIG_FS_VERITY |
5308 | sb->s_vop = &ext4_verityops; | |
5309 | #endif | |
ac27a0ec | 5310 | #ifdef CONFIG_QUOTA |
617ba13b | 5311 | sb->dq_op = &ext4_quota_operations; |
e2b911c5 | 5312 | if (ext4_has_feature_quota(sb)) |
1fa5efe3 | 5313 | sb->s_qcop = &dquot_quotactl_sysfile_ops; |
262b4662 JK |
5314 | else |
5315 | sb->s_qcop = &ext4_qctl_operations; | |
689c958c | 5316 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
ac27a0ec | 5317 | #endif |
85787090 | 5318 | memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); |
f2fa2ffc | 5319 | |
ac27a0ec | 5320 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ |
3b9d4ed2 | 5321 | mutex_init(&sbi->s_orphan_lock); |
ac27a0ec | 5322 | |
f7314a67 | 5323 | ext4_fast_commit_init(sb); |
aa75f4d3 | 5324 | |
ac27a0ec DK |
5325 | sb->s_root = NULL; |
5326 | ||
5327 | needs_recovery = (es->s_last_orphan != 0 || | |
02f310fc | 5328 | ext4_has_feature_orphan_present(sb) || |
e2b911c5 | 5329 | ext4_has_feature_journal_needs_recovery(sb)); |
ac27a0ec | 5330 | |
bc98a42c | 5331 | if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) |
c5e06d10 | 5332 | if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) |
50460fe8 | 5333 | goto failed_mount3a; |
c5e06d10 | 5334 | |
ac27a0ec DK |
5335 | /* |
5336 | * The first inode we look at is the journal inode. Don't try | |
5337 | * root first: it may be modified in the journal! | |
5338 | */ | |
e2b911c5 | 5339 | if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { |
9c1dd22d | 5340 | err = ext4_load_and_init_journal(sb, es, ctx); |
4753d8a2 | 5341 | if (err) |
50460fe8 | 5342 | goto failed_mount3a; |
bc98a42c | 5343 | } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && |
e2b911c5 | 5344 | ext4_has_feature_journal_needs_recovery(sb)) { |
b31e1552 ES |
5345 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
5346 | "suppressed and not mounted read-only"); | |
43bd6f1b | 5347 | goto failed_mount3a; |
ac27a0ec | 5348 | } else { |
1e381f60 | 5349 | /* Nojournal mode, all journal mount options are illegal */ |
89481b5f | 5350 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
1e381f60 | 5351 | ext4_msg(sb, KERN_ERR, "can't mount with " |
89481b5f | 5352 | "journal_async_commit, fs mounted w/o journal"); |
43bd6f1b | 5353 | goto failed_mount3a; |
1e381f60 | 5354 | } |
89481b5f BL |
5355 | |
5356 | if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { | |
1e381f60 | 5357 | ext4_msg(sb, KERN_ERR, "can't mount with " |
89481b5f | 5358 | "journal_checksum, fs mounted w/o journal"); |
43bd6f1b | 5359 | goto failed_mount3a; |
1e381f60 DM |
5360 | } |
5361 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { | |
5362 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5363 | "commit=%lu, fs mounted w/o journal", | |
5364 | sbi->s_commit_interval / HZ); | |
43bd6f1b | 5365 | goto failed_mount3a; |
1e381f60 DM |
5366 | } |
5367 | if (EXT4_MOUNT_DATA_FLAGS & | |
5368 | (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { | |
5369 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
5370 | "data=, fs mounted w/o journal"); | |
43bd6f1b | 5371 | goto failed_mount3a; |
1e381f60 | 5372 | } |
50b29d8f | 5373 | sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; |
1e381f60 | 5374 | clear_opt(sb, JOURNAL_CHECKSUM); |
fd8c37ec | 5375 | clear_opt(sb, DATA_FLAGS); |
995a3ed6 | 5376 | clear_opt2(sb, JOURNAL_FAST_COMMIT); |
0390131b FM |
5377 | sbi->s_journal = NULL; |
5378 | needs_recovery = 0; | |
ac27a0ec DK |
5379 | } |
5380 | ||
cdb7ee4c TE |
5381 | if (!test_opt(sb, NO_MBCACHE)) { |
5382 | sbi->s_ea_block_cache = ext4_xattr_create_cache(); | |
5383 | if (!sbi->s_ea_block_cache) { | |
dec214d0 | 5384 | ext4_msg(sb, KERN_ERR, |
cdb7ee4c | 5385 | "Failed to create ea_block_cache"); |
dec214d0 TE |
5386 | goto failed_mount_wq; |
5387 | } | |
cdb7ee4c TE |
5388 | |
5389 | if (ext4_has_feature_ea_inode(sb)) { | |
5390 | sbi->s_ea_inode_cache = ext4_xattr_create_cache(); | |
5391 | if (!sbi->s_ea_inode_cache) { | |
5392 | ext4_msg(sb, KERN_ERR, | |
5393 | "Failed to create ea_inode_cache"); | |
5394 | goto failed_mount_wq; | |
5395 | } | |
5396 | } | |
9c191f70 M |
5397 | } |
5398 | ||
952fc18e TT |
5399 | /* |
5400 | * Get the # of file system overhead blocks from the | |
5401 | * superblock if present. | |
5402 | */ | |
85d825db TT |
5403 | sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); |
5404 | /* ignore the precalculated value if it is ridiculous */ | |
5405 | if (sbi->s_overhead > ext4_blocks_count(es)) | |
5406 | sbi->s_overhead = 0; | |
5407 | /* | |
5408 | * If the bigalloc feature is not enabled recalculating the | |
5409 | * overhead doesn't take long, so we might as well just redo | |
5410 | * it to make sure we are using the correct value. | |
5411 | */ | |
5412 | if (!ext4_has_feature_bigalloc(sb)) | |
5413 | sbi->s_overhead = 0; | |
5414 | if (sbi->s_overhead == 0) { | |
07aa2ea1 LC |
5415 | err = ext4_calculate_overhead(sb); |
5416 | if (err) | |
952fc18e TT |
5417 | goto failed_mount_wq; |
5418 | } | |
5419 | ||
fd89d5f2 TH |
5420 | /* |
5421 | * The maximum number of concurrent works can be high and | |
5422 | * concurrency isn't really necessary. Limit it to 1. | |
5423 | */ | |
2e8fa54e JK |
5424 | EXT4_SB(sb)->rsv_conversion_wq = |
5425 | alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); | |
5426 | if (!EXT4_SB(sb)->rsv_conversion_wq) { | |
5427 | printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); | |
07aa2ea1 | 5428 | ret = -ENOMEM; |
2e8fa54e JK |
5429 | goto failed_mount4; |
5430 | } | |
5431 | ||
ac27a0ec | 5432 | /* |
dab291af | 5433 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
5434 | * so we can safely mount the rest of the filesystem now. |
5435 | */ | |
5436 | ||
8a363970 | 5437 | root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); |
1d1fe1ee | 5438 | if (IS_ERR(root)) { |
b31e1552 | 5439 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 5440 | ret = PTR_ERR(root); |
32a9bb57 | 5441 | root = NULL; |
ac27a0ec DK |
5442 | goto failed_mount4; |
5443 | } | |
5444 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
b31e1552 | 5445 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
94bf608a | 5446 | iput(root); |
ac27a0ec DK |
5447 | goto failed_mount4; |
5448 | } | |
b886ee3e | 5449 | |
48fde701 | 5450 | sb->s_root = d_make_root(root); |
1d1fe1ee | 5451 | if (!sb->s_root) { |
b31e1552 | 5452 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
5453 | ret = -ENOMEM; |
5454 | goto failed_mount4; | |
5455 | } | |
ac27a0ec | 5456 | |
c89128a0 JK |
5457 | ret = ext4_setup_super(sb, es, sb_rdonly(sb)); |
5458 | if (ret == -EROFS) { | |
1751e8a6 | 5459 | sb->s_flags |= SB_RDONLY; |
c89128a0 JK |
5460 | ret = 0; |
5461 | } else if (ret) | |
5462 | goto failed_mount4a; | |
ef7f3835 | 5463 | |
b5799018 | 5464 | ext4_set_resv_clusters(sb); |
27dd4385 | 5465 | |
0f5bde1d JK |
5466 | if (test_opt(sb, BLOCK_VALIDITY)) { |
5467 | err = ext4_setup_system_zone(sb); | |
5468 | if (err) { | |
5469 | ext4_msg(sb, KERN_ERR, "failed to initialize system " | |
5470 | "zone (%d)", err); | |
5471 | goto failed_mount4a; | |
5472 | } | |
f9ae9cf5 | 5473 | } |
8016e29f | 5474 | ext4_fc_replay_cleanup(sb); |
f9ae9cf5 TT |
5475 | |
5476 | ext4_ext_init(sb); | |
196e402a HS |
5477 | |
5478 | /* | |
5479 | * Enable optimize_scan if number of groups is > threshold. This can be | |
5480 | * turned off by passing "mb_optimize_scan=0". This can also be | |
5481 | * turned on forcefully by passing "mb_optimize_scan=1". | |
5482 | */ | |
27b38686 OM |
5483 | if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { |
5484 | if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) | |
5485 | set_opt2(sb, MB_OPTIMIZE_SCAN); | |
5486 | else | |
5487 | clear_opt2(sb, MB_OPTIMIZE_SCAN); | |
5488 | } | |
196e402a | 5489 | |
f9ae9cf5 TT |
5490 | err = ext4_mb_init(sb); |
5491 | if (err) { | |
5492 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", | |
5493 | err); | |
dcf2d804 | 5494 | goto failed_mount5; |
c2774d84 AK |
5495 | } |
5496 | ||
027f14f5 TT |
5497 | /* |
5498 | * We can only set up the journal commit callback once | |
5499 | * mballoc is initialized | |
5500 | */ | |
5501 | if (sbi->s_journal) | |
5502 | sbi->s_journal->j_commit_callback = | |
5503 | ext4_journal_commit_callback; | |
5504 | ||
d5e72c4e TT |
5505 | err = ext4_percpu_param_init(sbi); |
5506 | if (err) | |
d5e03cbb | 5507 | goto failed_mount6; |
d5e03cbb | 5508 | |
e2b911c5 | 5509 | if (ext4_has_feature_flex_bg(sb)) |
d5e03cbb TT |
5510 | if (!ext4_fill_flex_info(sb)) { |
5511 | ext4_msg(sb, KERN_ERR, | |
5512 | "unable to initialize " | |
5513 | "flex_bg meta info!"); | |
8f6840c4 | 5514 | ret = -ENOMEM; |
d5e03cbb TT |
5515 | goto failed_mount6; |
5516 | } | |
5517 | ||
bfff6873 LC |
5518 | err = ext4_register_li_request(sb, first_not_zeroed); |
5519 | if (err) | |
dcf2d804 | 5520 | goto failed_mount6; |
bfff6873 | 5521 | |
b5799018 | 5522 | err = ext4_register_sysfs(sb); |
dcf2d804 TM |
5523 | if (err) |
5524 | goto failed_mount7; | |
3197ebdb | 5525 | |
02f310fc JK |
5526 | err = ext4_init_orphan_info(sb); |
5527 | if (err) | |
5528 | goto failed_mount8; | |
9b2ff357 JK |
5529 | #ifdef CONFIG_QUOTA |
5530 | /* Enable quota usage during mount. */ | |
bc98a42c | 5531 | if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { |
9b2ff357 JK |
5532 | err = ext4_enable_quotas(sb); |
5533 | if (err) | |
02f310fc | 5534 | goto failed_mount9; |
9b2ff357 JK |
5535 | } |
5536 | #endif /* CONFIG_QUOTA */ | |
5537 | ||
bc71726c | 5538 | /* |
5539 | * Save the original bdev mapping's wb_err value which could be | |
5540 | * used to detect the metadata async write error. | |
5541 | */ | |
5542 | spin_lock_init(&sbi->s_bdev_wb_lock); | |
9704a322 ZX |
5543 | errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, |
5544 | &sbi->s_bdev_wb_err); | |
bc71726c | 5545 | sb->s_bdev->bd_super = sb; |
617ba13b MC |
5546 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
5547 | ext4_orphan_cleanup(sb, es); | |
5548 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
9b6641dd YB |
5549 | /* |
5550 | * Update the checksum after updating free space/inode counters and | |
5551 | * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect | |
5552 | * checksum in the buffer cache until it is written out and | |
5553 | * e2fsprogs programs trying to open a file system immediately | |
5554 | * after it is mounted can fail. | |
5555 | */ | |
5556 | ext4_superblock_csum_set(sb); | |
0390131b | 5557 | if (needs_recovery) { |
b31e1552 | 5558 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
11215630 JK |
5559 | err = ext4_mark_recovery_complete(sb, es); |
5560 | if (err) | |
02f310fc | 5561 | goto failed_mount9; |
0390131b | 5562 | } |
0390131b | 5563 | |
70200574 CH |
5564 | if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) |
5565 | ext4_msg(sb, KERN_WARNING, | |
5566 | "mounting with \"discard\" option, but the device does not support discard"); | |
79add3a3 | 5567 | |
66e61a9e TT |
5568 | if (es->s_error_count) |
5569 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 5570 | |
efbed4dc TT |
5571 | /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ |
5572 | ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); | |
5573 | ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); | |
5574 | ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); | |
1cf006ed DM |
5575 | atomic_set(&sbi->s_warning_count, 0); |
5576 | atomic_set(&sbi->s_msg_count, 0); | |
efbed4dc | 5577 | |
ac27a0ec DK |
5578 | return 0; |
5579 | ||
02f310fc JK |
5580 | failed_mount9: |
5581 | ext4_release_orphan_info(sb); | |
72ba7450 | 5582 | failed_mount8: |
ebd173be | 5583 | ext4_unregister_sysfs(sb); |
cb8d53d2 | 5584 | kobject_put(&sbi->s_kobj); |
dcf2d804 TM |
5585 | failed_mount7: |
5586 | ext4_unregister_li_request(sb); | |
5587 | failed_mount6: | |
f9ae9cf5 | 5588 | ext4_mb_release(sb); |
dcbf8758 | 5589 | ext4_flex_groups_free(sbi); |
1f79467c | 5590 | ext4_percpu_param_destroy(sbi); |
00764937 | 5591 | failed_mount5: |
f9ae9cf5 TT |
5592 | ext4_ext_release(sb); |
5593 | ext4_release_system_zone(sb); | |
5594 | failed_mount4a: | |
94bf608a | 5595 | dput(sb->s_root); |
32a9bb57 | 5596 | sb->s_root = NULL; |
94bf608a | 5597 | failed_mount4: |
b31e1552 | 5598 | ext4_msg(sb, KERN_ERR, "mount failed"); |
2e8fa54e JK |
5599 | if (EXT4_SB(sb)->rsv_conversion_wq) |
5600 | destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); | |
4c0425ff | 5601 | failed_mount_wq: |
50c15df6 CX |
5602 | ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); |
5603 | sbi->s_ea_inode_cache = NULL; | |
5604 | ||
5605 | ext4_xattr_destroy_cache(sbi->s_ea_block_cache); | |
5606 | sbi->s_ea_block_cache = NULL; | |
5607 | ||
0390131b | 5608 | if (sbi->s_journal) { |
bb9464e0 | 5609 | /* flush s_error_work before journal destroy. */ |
5610 | flush_work(&sbi->s_error_work); | |
0390131b FM |
5611 | jbd2_journal_destroy(sbi->s_journal); |
5612 | sbi->s_journal = NULL; | |
5613 | } | |
50460fe8 | 5614 | failed_mount3a: |
d3922a77 | 5615 | ext4_es_unregister_shrinker(sbi); |
eb68d0e2 | 5616 | failed_mount3: |
bb9464e0 | 5617 | /* flush s_error_work before sbi destroy */ |
c92dc856 | 5618 | flush_work(&sbi->s_error_work); |
2a4ae3bc | 5619 | del_timer_sync(&sbi->s_err_report); |
618f0031 | 5620 | ext4_stop_mmpd(sbi); |
a4e6a511 | 5621 | ext4_group_desc_free(sbi); |
ac27a0ec | 5622 | failed_mount: |
0441984a DW |
5623 | if (sbi->s_chksum_driver) |
5624 | crypto_free_shash(sbi->s_chksum_driver); | |
c83ad55e | 5625 | |
5298d4bf | 5626 | #if IS_ENABLED(CONFIG_UNICODE) |
f8f4acb6 | 5627 | utf8_unload(sb->s_encoding); |
c83ad55e GKB |
5628 | #endif |
5629 | ||
ac27a0ec | 5630 | #ifdef CONFIG_QUOTA |
856dd6c5 | 5631 | for (unsigned int i = 0; i < EXT4_MAXQUOTAS; i++) |
0ba33fac | 5632 | kfree(get_qf_name(sb, sbi, i)); |
ac27a0ec | 5633 | #endif |
ac4acb1f | 5634 | fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); |
afd09b61 | 5635 | /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ |
a7a79c29 | 5636 | brelse(sbi->s_sbh); |
afd09b61 | 5637 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
5638 | out_fail: |
5639 | sb->s_fs_info = NULL; | |
07aa2ea1 | 5640 | return err ? err : ret; |
ac27a0ec DK |
5641 | } |
5642 | ||
cebe85d5 | 5643 | static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) |
7edfd85b | 5644 | { |
cebe85d5 | 5645 | struct ext4_fs_context *ctx = fc->fs_private; |
7edfd85b | 5646 | struct ext4_sb_info *sbi; |
7edfd85b | 5647 | const char *descr; |
cebe85d5 | 5648 | int ret; |
7edfd85b LC |
5649 | |
5650 | sbi = ext4_alloc_sbi(sb); | |
cebe85d5 | 5651 | if (!sbi) |
7c268d4c | 5652 | return -ENOMEM; |
7edfd85b | 5653 | |
cebe85d5 LC |
5654 | fc->s_fs_info = sbi; |
5655 | ||
5656 | /* Cleanup superblock name */ | |
5657 | strreplace(sb->s_id, '/', '!'); | |
7edfd85b LC |
5658 | |
5659 | sbi->s_sb_block = 1; /* Default super block location */ | |
cebe85d5 LC |
5660 | if (ctx->spec & EXT4_SPEC_s_sb_block) |
5661 | sbi->s_sb_block = ctx->s_sb_block; | |
7edfd85b | 5662 | |
960e0ab6 | 5663 | ret = __ext4_fill_super(fc, sb); |
7edfd85b LC |
5664 | if (ret < 0) |
5665 | goto free_sbi; | |
5666 | ||
cebe85d5 | 5667 | if (sbi->s_journal) { |
7edfd85b LC |
5668 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
5669 | descr = " journalled data mode"; | |
5670 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
5671 | descr = " ordered data mode"; | |
5672 | else | |
5673 | descr = " writeback data mode"; | |
5674 | } else | |
5675 | descr = "out journal"; | |
5676 | ||
5677 | if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) | |
bb0fbc78 LC |
5678 | ext4_msg(sb, KERN_INFO, "mounted filesystem %pU with%s. " |
5679 | "Quota mode: %s.", &sb->s_uuid, descr, | |
5680 | ext4_quota_mode(sb)); | |
cebe85d5 | 5681 | |
eb705421 | 5682 | /* Update the s_overhead_clusters if necessary */ |
827891a3 | 5683 | ext4_update_overhead(sb, false); |
7edfd85b | 5684 | return 0; |
cebe85d5 | 5685 | |
7edfd85b LC |
5686 | free_sbi: |
5687 | ext4_free_sbi(sbi); | |
cebe85d5 | 5688 | fc->s_fs_info = NULL; |
7edfd85b LC |
5689 | return ret; |
5690 | } | |
5691 | ||
cebe85d5 LC |
5692 | static int ext4_get_tree(struct fs_context *fc) |
5693 | { | |
5694 | return get_tree_bdev(fc, ext4_fill_super); | |
5695 | } | |
5696 | ||
ac27a0ec DK |
5697 | /* |
5698 | * Setup any per-fs journal parameters now. We'll do this both on | |
5699 | * initial mount, once the journal has been initialised but before we've | |
5700 | * done any recovery; and again on any subsequent remount. | |
5701 | */ | |
617ba13b | 5702 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 5703 | { |
617ba13b | 5704 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 5705 | |
30773840 TT |
5706 | journal->j_commit_interval = sbi->s_commit_interval; |
5707 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
5708 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
6866d7b3 | 5709 | ext4_fc_init(sb, journal); |
ac27a0ec | 5710 | |
a931da6a | 5711 | write_lock(&journal->j_state_lock); |
ac27a0ec | 5712 | if (test_opt(sb, BARRIER)) |
dab291af | 5713 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 5714 | else |
dab291af | 5715 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
5716 | if (test_opt(sb, DATA_ERR_ABORT)) |
5717 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
5718 | else | |
5719 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 5720 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
5721 | } |
5722 | ||
c6cb7e77 EW |
5723 | static struct inode *ext4_get_journal_inode(struct super_block *sb, |
5724 | unsigned int journal_inum) | |
ac27a0ec DK |
5725 | { |
5726 | struct inode *journal_inode; | |
ac27a0ec | 5727 | |
c6cb7e77 EW |
5728 | /* |
5729 | * Test for the existence of a valid inode on disk. Bad things | |
5730 | * happen if we iget() an unused inode, as the subsequent iput() | |
5731 | * will try to delete it. | |
5732 | */ | |
8a363970 | 5733 | journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); |
1d1fe1ee | 5734 | if (IS_ERR(journal_inode)) { |
b31e1552 | 5735 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
5736 | return NULL; |
5737 | } | |
5738 | if (!journal_inode->i_nlink) { | |
5739 | make_bad_inode(journal_inode); | |
5740 | iput(journal_inode); | |
b31e1552 | 5741 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
5742 | return NULL; |
5743 | } | |
5744 | ||
4978c659 | 5745 | ext4_debug("Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 5746 | journal_inode, journal_inode->i_size); |
105c78e1 | 5747 | if (!S_ISREG(journal_inode->i_mode) || IS_ENCRYPTED(journal_inode)) { |
b31e1552 | 5748 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
5749 | iput(journal_inode); |
5750 | return NULL; | |
5751 | } | |
c6cb7e77 EW |
5752 | return journal_inode; |
5753 | } | |
5754 | ||
62913ae9 TT |
5755 | static int ext4_journal_bmap(journal_t *journal, sector_t *block) |
5756 | { | |
5757 | struct ext4_map_blocks map; | |
5758 | int ret; | |
5759 | ||
5760 | if (journal->j_inode == NULL) | |
5761 | return 0; | |
5762 | ||
5763 | map.m_lblk = *block; | |
5764 | map.m_len = 1; | |
5765 | ret = ext4_map_blocks(NULL, journal->j_inode, &map, 0); | |
5766 | if (ret <= 0) { | |
5767 | ext4_msg(journal->j_inode->i_sb, KERN_CRIT, | |
5768 | "journal bmap failed: block %llu ret %d\n", | |
5769 | *block, ret); | |
5770 | jbd2_journal_abort(journal, ret ? ret : -EIO); | |
5771 | return ret; | |
5772 | } | |
5773 | *block = map.m_pblk; | |
5774 | return 0; | |
5775 | } | |
5776 | ||
c6cb7e77 EW |
5777 | static journal_t *ext4_get_journal(struct super_block *sb, |
5778 | unsigned int journal_inum) | |
5779 | { | |
5780 | struct inode *journal_inode; | |
5781 | journal_t *journal; | |
5782 | ||
11215630 JK |
5783 | if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) |
5784 | return NULL; | |
c6cb7e77 EW |
5785 | |
5786 | journal_inode = ext4_get_journal_inode(sb, journal_inum); | |
5787 | if (!journal_inode) | |
5788 | return NULL; | |
ac27a0ec | 5789 | |
dab291af | 5790 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 5791 | if (!journal) { |
b31e1552 | 5792 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
5793 | iput(journal_inode); |
5794 | return NULL; | |
5795 | } | |
5796 | journal->j_private = sb; | |
62913ae9 | 5797 | journal->j_bmap = ext4_journal_bmap; |
617ba13b | 5798 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
5799 | return journal; |
5800 | } | |
5801 | ||
617ba13b | 5802 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
5803 | dev_t j_dev) |
5804 | { | |
2b2d6d01 | 5805 | struct buffer_head *bh; |
ac27a0ec | 5806 | journal_t *journal; |
617ba13b MC |
5807 | ext4_fsblk_t start; |
5808 | ext4_fsblk_t len; | |
ac27a0ec | 5809 | int hblock, blocksize; |
617ba13b | 5810 | ext4_fsblk_t sb_block; |
ac27a0ec | 5811 | unsigned long offset; |
2b2d6d01 | 5812 | struct ext4_super_block *es; |
ac27a0ec DK |
5813 | struct block_device *bdev; |
5814 | ||
11215630 JK |
5815 | if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) |
5816 | return NULL; | |
0390131b | 5817 | |
b31e1552 | 5818 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
5819 | if (bdev == NULL) |
5820 | return NULL; | |
5821 | ||
ac27a0ec | 5822 | blocksize = sb->s_blocksize; |
e1defc4f | 5823 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 5824 | if (blocksize < hblock) { |
b31e1552 ES |
5825 | ext4_msg(sb, KERN_ERR, |
5826 | "blocksize too small for journal device"); | |
ac27a0ec DK |
5827 | goto out_bdev; |
5828 | } | |
5829 | ||
617ba13b MC |
5830 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
5831 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
5832 | set_blocksize(bdev, blocksize); |
5833 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
5834 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
5835 | "external journal"); | |
ac27a0ec DK |
5836 | goto out_bdev; |
5837 | } | |
5838 | ||
2716b802 | 5839 | es = (struct ext4_super_block *) (bh->b_data + offset); |
617ba13b | 5840 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || |
ac27a0ec | 5841 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 5842 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
5843 | ext4_msg(sb, KERN_ERR, "external journal has " |
5844 | "bad superblock"); | |
ac27a0ec DK |
5845 | brelse(bh); |
5846 | goto out_bdev; | |
5847 | } | |
5848 | ||
df4763be DW |
5849 | if ((le32_to_cpu(es->s_feature_ro_compat) & |
5850 | EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && | |
5851 | es->s_checksum != ext4_superblock_csum(sb, es)) { | |
5852 | ext4_msg(sb, KERN_ERR, "external journal has " | |
5853 | "corrupt superblock"); | |
5854 | brelse(bh); | |
5855 | goto out_bdev; | |
5856 | } | |
5857 | ||
617ba13b | 5858 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 5859 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
5860 | brelse(bh); |
5861 | goto out_bdev; | |
5862 | } | |
5863 | ||
bd81d8ee | 5864 | len = ext4_blocks_count(es); |
ac27a0ec DK |
5865 | start = sb_block + 1; |
5866 | brelse(bh); /* we're done with the superblock */ | |
5867 | ||
dab291af | 5868 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
5869 | start, len, blocksize); |
5870 | if (!journal) { | |
b31e1552 | 5871 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
5872 | goto out_bdev; |
5873 | } | |
5874 | journal->j_private = sb; | |
2d069c08 | 5875 | if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { |
b31e1552 | 5876 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
5877 | goto out_journal; |
5878 | } | |
5879 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
5880 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
5881 | "user (unsupported) - %d", | |
ac27a0ec DK |
5882 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
5883 | goto out_journal; | |
5884 | } | |
ee7ed3aa | 5885 | EXT4_SB(sb)->s_journal_bdev = bdev; |
617ba13b | 5886 | ext4_init_journal_params(sb, journal); |
ac27a0ec | 5887 | return journal; |
0b8e58a1 | 5888 | |
ac27a0ec | 5889 | out_journal: |
dab291af | 5890 | jbd2_journal_destroy(journal); |
ac27a0ec | 5891 | out_bdev: |
617ba13b | 5892 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
5893 | return NULL; |
5894 | } | |
5895 | ||
617ba13b MC |
5896 | static int ext4_load_journal(struct super_block *sb, |
5897 | struct ext4_super_block *es, | |
ac27a0ec DK |
5898 | unsigned long journal_devnum) |
5899 | { | |
5900 | journal_t *journal; | |
5901 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
5902 | dev_t journal_dev; | |
5903 | int err = 0; | |
5904 | int really_read_only; | |
273108fa | 5905 | int journal_dev_ro; |
ac27a0ec | 5906 | |
11215630 JK |
5907 | if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) |
5908 | return -EFSCORRUPTED; | |
0390131b | 5909 | |
ac27a0ec DK |
5910 | if (journal_devnum && |
5911 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
5912 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
5913 | "numbers have changed"); | |
ac27a0ec DK |
5914 | journal_dev = new_decode_dev(journal_devnum); |
5915 | } else | |
5916 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
5917 | ||
273108fa LC |
5918 | if (journal_inum && journal_dev) { |
5919 | ext4_msg(sb, KERN_ERR, | |
5920 | "filesystem has both journal inode and journal device!"); | |
5921 | return -EINVAL; | |
5922 | } | |
5923 | ||
5924 | if (journal_inum) { | |
5925 | journal = ext4_get_journal(sb, journal_inum); | |
5926 | if (!journal) | |
5927 | return -EINVAL; | |
5928 | } else { | |
5929 | journal = ext4_get_dev_journal(sb, journal_dev); | |
5930 | if (!journal) | |
5931 | return -EINVAL; | |
5932 | } | |
5933 | ||
5934 | journal_dev_ro = bdev_read_only(journal->j_dev); | |
5935 | really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; | |
5936 | ||
5937 | if (journal_dev_ro && !sb_rdonly(sb)) { | |
5938 | ext4_msg(sb, KERN_ERR, | |
5939 | "journal device read-only, try mounting with '-o ro'"); | |
5940 | err = -EROFS; | |
5941 | goto err_out; | |
5942 | } | |
ac27a0ec DK |
5943 | |
5944 | /* | |
5945 | * Are we loading a blank journal or performing recovery after a | |
5946 | * crash? For recovery, we need to check in advance whether we | |
5947 | * can get read-write access to the device. | |
5948 | */ | |
e2b911c5 | 5949 | if (ext4_has_feature_journal_needs_recovery(sb)) { |
bc98a42c | 5950 | if (sb_rdonly(sb)) { |
b31e1552 ES |
5951 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
5952 | "required on readonly filesystem"); | |
ac27a0ec | 5953 | if (really_read_only) { |
b31e1552 | 5954 | ext4_msg(sb, KERN_ERR, "write access " |
d98bf8cd SR |
5955 | "unavailable, cannot proceed " |
5956 | "(try mounting with noload)"); | |
273108fa LC |
5957 | err = -EROFS; |
5958 | goto err_out; | |
ac27a0ec | 5959 | } |
b31e1552 ES |
5960 | ext4_msg(sb, KERN_INFO, "write access will " |
5961 | "be enabled during recovery"); | |
ac27a0ec DK |
5962 | } |
5963 | } | |
5964 | ||
90576c0b | 5965 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 5966 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 5967 | |
e2b911c5 | 5968 | if (!ext4_has_feature_journal_needs_recovery(sb)) |
dab291af | 5969 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
5970 | if (!err) { |
5971 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
eee00237 | 5972 | |
1c13d5c0 TT |
5973 | if (save) |
5974 | memcpy(save, ((char *) es) + | |
5975 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 5976 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
5977 | if (save) |
5978 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
5979 | save, EXT4_S_ERR_LEN); | |
5980 | kfree(save); | |
eee00237 YB |
5981 | es->s_state |= cpu_to_le16(EXT4_SB(sb)->s_mount_state & |
5982 | EXT4_ERROR_FS); | |
5983 | /* Write out restored error information to the superblock */ | |
5984 | if (!bdev_read_only(sb->s_bdev)) { | |
5985 | int err2; | |
5986 | err2 = ext4_commit_super(sb); | |
5987 | err = err ? : err2; | |
5988 | } | |
1c13d5c0 | 5989 | } |
ac27a0ec DK |
5990 | |
5991 | if (err) { | |
b31e1552 | 5992 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
273108fa | 5993 | goto err_out; |
ac27a0ec DK |
5994 | } |
5995 | ||
617ba13b | 5996 | EXT4_SB(sb)->s_journal = journal; |
11215630 JK |
5997 | err = ext4_clear_journal_err(sb, es); |
5998 | if (err) { | |
5999 | EXT4_SB(sb)->s_journal = NULL; | |
6000 | jbd2_journal_destroy(journal); | |
6001 | return err; | |
6002 | } | |
ac27a0ec | 6003 | |
c41303ce | 6004 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
6005 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
6006 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
3039d8b8 BL |
6007 | ext4_commit_super(sb); |
6008 | } | |
6009 | if (!really_read_only && journal_inum && | |
6010 | journal_inum != le32_to_cpu(es->s_journal_inum)) { | |
6011 | es->s_journal_inum = cpu_to_le32(journal_inum); | |
4392fbc4 | 6012 | ext4_commit_super(sb); |
ac27a0ec DK |
6013 | } |
6014 | ||
6015 | return 0; | |
273108fa LC |
6016 | |
6017 | err_out: | |
6018 | jbd2_journal_destroy(journal); | |
6019 | return err; | |
ac27a0ec DK |
6020 | } |
6021 | ||
2d01ddc8 JK |
6022 | /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ |
6023 | static void ext4_update_super(struct super_block *sb) | |
ac27a0ec | 6024 | { |
c92dc856 | 6025 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
e92ad03f JK |
6026 | struct ext4_super_block *es = sbi->s_es; |
6027 | struct buffer_head *sbh = sbi->s_sbh; | |
a17712c8 | 6028 | |
05c2c00f | 6029 | lock_buffer(sbh); |
71290b36 TT |
6030 | /* |
6031 | * If the file system is mounted read-only, don't update the | |
6032 | * superblock write time. This avoids updating the superblock | |
6033 | * write time when we are mounting the root file system | |
6034 | * read/only but we need to replay the journal; at that point, | |
6035 | * for people who are east of GMT and who make their clock | |
6036 | * tick in localtime for Windows bug-for-bug compatibility, | |
6037 | * the clock is set in the future, and this will cause e2fsck | |
6038 | * to complain and force a full file system check. | |
6039 | */ | |
1751e8a6 | 6040 | if (!(sb->s_flags & SB_RDONLY)) |
6a0678a7 | 6041 | ext4_update_tstamp(es, s_wtime); |
8446fe92 | 6042 | es->s_kbytes_written = |
0bc9bc1d | 6043 | cpu_to_le64(sbi->s_kbytes_written + |
8446fe92 | 6044 | ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - |
0bc9bc1d | 6045 | sbi->s_sectors_written_start) >> 1)); |
e92ad03f | 6046 | if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) |
d5e03cbb | 6047 | ext4_free_blocks_count_set(es, |
e92ad03f JK |
6048 | EXT4_C2B(sbi, percpu_counter_sum_positive( |
6049 | &sbi->s_freeclusters_counter))); | |
6050 | if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) | |
d5e03cbb TT |
6051 | es->s_free_inodes_count = |
6052 | cpu_to_le32(percpu_counter_sum_positive( | |
e92ad03f | 6053 | &sbi->s_freeinodes_counter)); |
c92dc856 JK |
6054 | /* Copy error information to the on-disk superblock */ |
6055 | spin_lock(&sbi->s_error_lock); | |
6056 | if (sbi->s_add_error_count > 0) { | |
6057 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
6058 | if (!es->s_first_error_time && !es->s_first_error_time_hi) { | |
6059 | __ext4_update_tstamp(&es->s_first_error_time, | |
6060 | &es->s_first_error_time_hi, | |
6061 | sbi->s_first_error_time); | |
6062 | strncpy(es->s_first_error_func, sbi->s_first_error_func, | |
6063 | sizeof(es->s_first_error_func)); | |
6064 | es->s_first_error_line = | |
6065 | cpu_to_le32(sbi->s_first_error_line); | |
6066 | es->s_first_error_ino = | |
6067 | cpu_to_le32(sbi->s_first_error_ino); | |
6068 | es->s_first_error_block = | |
6069 | cpu_to_le64(sbi->s_first_error_block); | |
6070 | es->s_first_error_errcode = | |
6071 | ext4_errno_to_code(sbi->s_first_error_code); | |
6072 | } | |
6073 | __ext4_update_tstamp(&es->s_last_error_time, | |
6074 | &es->s_last_error_time_hi, | |
6075 | sbi->s_last_error_time); | |
6076 | strncpy(es->s_last_error_func, sbi->s_last_error_func, | |
6077 | sizeof(es->s_last_error_func)); | |
6078 | es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); | |
6079 | es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); | |
6080 | es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); | |
6081 | es->s_last_error_errcode = | |
6082 | ext4_errno_to_code(sbi->s_last_error_code); | |
6083 | /* | |
6084 | * Start the daily error reporting function if it hasn't been | |
6085 | * started already | |
6086 | */ | |
6087 | if (!es->s_error_count) | |
6088 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); | |
6089 | le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); | |
6090 | sbi->s_add_error_count = 0; | |
6091 | } | |
6092 | spin_unlock(&sbi->s_error_lock); | |
6093 | ||
06db49e6 | 6094 | ext4_superblock_csum_set(sb); |
2d01ddc8 JK |
6095 | unlock_buffer(sbh); |
6096 | } | |
6097 | ||
6098 | static int ext4_commit_super(struct super_block *sb) | |
6099 | { | |
6100 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; | |
2d01ddc8 | 6101 | |
f88f1466 FC |
6102 | if (!sbh) |
6103 | return -EINVAL; | |
6104 | if (block_device_ejected(sb)) | |
6105 | return -ENODEV; | |
2d01ddc8 JK |
6106 | |
6107 | ext4_update_super(sb); | |
6108 | ||
15baa7dc ZY |
6109 | lock_buffer(sbh); |
6110 | /* Buffer got discarded which means block device got invalidated */ | |
6111 | if (!buffer_mapped(sbh)) { | |
6112 | unlock_buffer(sbh); | |
6113 | return -EIO; | |
6114 | } | |
6115 | ||
e8680786 | 6116 | if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { |
4743f839 PKS |
6117 | /* |
6118 | * Oh, dear. A previous attempt to write the | |
6119 | * superblock failed. This could happen because the | |
6120 | * USB device was yanked out. Or it could happen to | |
6121 | * be a transient write error and maybe the block will | |
6122 | * be remapped. Nothing we can do but to retry the | |
6123 | * write and hope for the best. | |
6124 | */ | |
6125 | ext4_msg(sb, KERN_ERR, "previous I/O error to " | |
6126 | "superblock detected"); | |
6127 | clear_buffer_write_io_error(sbh); | |
6128 | set_buffer_uptodate(sbh); | |
6129 | } | |
15baa7dc ZY |
6130 | get_bh(sbh); |
6131 | /* Clear potential dirty bit if it was journalled update */ | |
6132 | clear_buffer_dirty(sbh); | |
6133 | sbh->b_end_io = end_buffer_write_sync; | |
1420c4a5 BVA |
6134 | submit_bh(REQ_OP_WRITE | REQ_SYNC | |
6135 | (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); | |
15baa7dc | 6136 | wait_on_buffer(sbh); |
4392fbc4 JK |
6137 | if (buffer_write_io_error(sbh)) { |
6138 | ext4_msg(sb, KERN_ERR, "I/O error while writing " | |
6139 | "superblock"); | |
6140 | clear_buffer_write_io_error(sbh); | |
6141 | set_buffer_uptodate(sbh); | |
15baa7dc | 6142 | return -EIO; |
914258bf | 6143 | } |
15baa7dc | 6144 | return 0; |
ac27a0ec DK |
6145 | } |
6146 | ||
ac27a0ec DK |
6147 | /* |
6148 | * Have we just finished recovery? If so, and if we are mounting (or | |
6149 | * remounting) the filesystem readonly, then we will end up with a | |
6150 | * consistent fs on disk. Record that fact. | |
6151 | */ | |
11215630 JK |
6152 | static int ext4_mark_recovery_complete(struct super_block *sb, |
6153 | struct ext4_super_block *es) | |
ac27a0ec | 6154 | { |
11215630 | 6155 | int err; |
617ba13b | 6156 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 6157 | |
e2b911c5 | 6158 | if (!ext4_has_feature_journal(sb)) { |
11215630 JK |
6159 | if (journal != NULL) { |
6160 | ext4_error(sb, "Journal got removed while the fs was " | |
6161 | "mounted!"); | |
6162 | return -EFSCORRUPTED; | |
6163 | } | |
6164 | return 0; | |
0390131b | 6165 | } |
dab291af | 6166 | jbd2_journal_lock_updates(journal); |
01d5d965 | 6167 | err = jbd2_journal_flush(journal, 0); |
11215630 | 6168 | if (err < 0) |
7ffe1ea8 HK |
6169 | goto out; |
6170 | ||
02f310fc JK |
6171 | if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || |
6172 | ext4_has_feature_orphan_present(sb))) { | |
6173 | if (!ext4_orphan_file_empty(sb)) { | |
6174 | ext4_error(sb, "Orphan file not empty on read-only fs."); | |
6175 | err = -EFSCORRUPTED; | |
6176 | goto out; | |
6177 | } | |
e2b911c5 | 6178 | ext4_clear_feature_journal_needs_recovery(sb); |
02f310fc | 6179 | ext4_clear_feature_orphan_present(sb); |
4392fbc4 | 6180 | ext4_commit_super(sb); |
ac27a0ec | 6181 | } |
7ffe1ea8 | 6182 | out: |
dab291af | 6183 | jbd2_journal_unlock_updates(journal); |
11215630 | 6184 | return err; |
ac27a0ec DK |
6185 | } |
6186 | ||
6187 | /* | |
6188 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
6189 | * has recorded an error from a previous lifetime, move that error to the | |
6190 | * main filesystem now. | |
6191 | */ | |
11215630 | 6192 | static int ext4_clear_journal_err(struct super_block *sb, |
2b2d6d01 | 6193 | struct ext4_super_block *es) |
ac27a0ec DK |
6194 | { |
6195 | journal_t *journal; | |
6196 | int j_errno; | |
6197 | const char *errstr; | |
6198 | ||
11215630 JK |
6199 | if (!ext4_has_feature_journal(sb)) { |
6200 | ext4_error(sb, "Journal got removed while the fs was mounted!"); | |
6201 | return -EFSCORRUPTED; | |
6202 | } | |
0390131b | 6203 | |
617ba13b | 6204 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
6205 | |
6206 | /* | |
6207 | * Now check for any error status which may have been recorded in the | |
617ba13b | 6208 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
6209 | */ |
6210 | ||
dab291af | 6211 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
6212 | if (j_errno) { |
6213 | char nbuf[16]; | |
6214 | ||
617ba13b | 6215 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 6216 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 6217 | "from previous mount: %s", errstr); |
ac27a0ec | 6218 | |
617ba13b MC |
6219 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
6220 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
f57886ca YB |
6221 | j_errno = ext4_commit_super(sb); |
6222 | if (j_errno) | |
6223 | return j_errno; | |
6224 | ext4_warning(sb, "Marked fs in need of filesystem check."); | |
ac27a0ec | 6225 | |
dab291af | 6226 | jbd2_journal_clear_err(journal); |
d796c52e | 6227 | jbd2_journal_update_sb_errno(journal); |
ac27a0ec | 6228 | } |
11215630 | 6229 | return 0; |
ac27a0ec DK |
6230 | } |
6231 | ||
6232 | /* | |
6233 | * Force the running and committing transactions to commit, | |
6234 | * and wait on the commit. | |
6235 | */ | |
617ba13b | 6236 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
6237 | { |
6238 | journal_t *journal; | |
ac27a0ec | 6239 | |
bc98a42c | 6240 | if (sb_rdonly(sb)) |
ac27a0ec DK |
6241 | return 0; |
6242 | ||
617ba13b | 6243 | journal = EXT4_SB(sb)->s_journal; |
b1deefc9 | 6244 | return ext4_journal_force_commit(journal); |
ac27a0ec DK |
6245 | } |
6246 | ||
617ba13b | 6247 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 6248 | { |
14ce0cb4 | 6249 | int ret = 0; |
9eddacf9 | 6250 | tid_t target; |
06a407f1 | 6251 | bool needs_barrier = false; |
8d5d02e6 | 6252 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 6253 | |
49598e04 | 6254 | if (unlikely(ext4_forced_shutdown(sbi))) |
0db1ff22 TT |
6255 | return 0; |
6256 | ||
9bffad1e | 6257 | trace_ext4_sync_fs(sb, wait); |
2e8fa54e | 6258 | flush_workqueue(sbi->rsv_conversion_wq); |
a1177825 JK |
6259 | /* |
6260 | * Writeback quota in non-journalled quota case - journalled quota has | |
6261 | * no dirty dquots | |
6262 | */ | |
6263 | dquot_writeback_dquots(sb, -1); | |
06a407f1 DM |
6264 | /* |
6265 | * Data writeback is possible w/o journal transaction, so barrier must | |
6266 | * being sent at the end of the function. But we can skip it if | |
6267 | * transaction_commit will do it for us. | |
6268 | */ | |
bda32530 TT |
6269 | if (sbi->s_journal) { |
6270 | target = jbd2_get_latest_transaction(sbi->s_journal); | |
6271 | if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && | |
6272 | !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) | |
6273 | needs_barrier = true; | |
6274 | ||
6275 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
6276 | if (wait) | |
6277 | ret = jbd2_log_wait_commit(sbi->s_journal, | |
6278 | target); | |
6279 | } | |
6280 | } else if (wait && test_opt(sb, BARRIER)) | |
06a407f1 | 6281 | needs_barrier = true; |
06a407f1 DM |
6282 | if (needs_barrier) { |
6283 | int err; | |
c6bf3f0e | 6284 | err = blkdev_issue_flush(sb->s_bdev); |
06a407f1 DM |
6285 | if (!ret) |
6286 | ret = err; | |
0390131b | 6287 | } |
06a407f1 DM |
6288 | |
6289 | return ret; | |
6290 | } | |
6291 | ||
ac27a0ec DK |
6292 | /* |
6293 | * LVM calls this function before a (read-only) snapshot is created. This | |
6294 | * gives us a chance to flush the journal completely and mark the fs clean. | |
be4f27d3 YY |
6295 | * |
6296 | * Note that only this function cannot bring a filesystem to be in a clean | |
8e8ad8a5 JK |
6297 | * state independently. It relies on upper layer to stop all data & metadata |
6298 | * modifications. | |
ac27a0ec | 6299 | */ |
c4be0c1d | 6300 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 6301 | { |
c4be0c1d TS |
6302 | int error = 0; |
6303 | journal_t *journal; | |
ac27a0ec | 6304 | |
bc98a42c | 6305 | if (sb_rdonly(sb)) |
9ca92389 | 6306 | return 0; |
ac27a0ec | 6307 | |
9ca92389 | 6308 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 6309 | |
bb044576 TT |
6310 | if (journal) { |
6311 | /* Now we set up the journal barrier. */ | |
6312 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 6313 | |
bb044576 TT |
6314 | /* |
6315 | * Don't clear the needs_recovery flag if we failed to | |
6316 | * flush the journal. | |
6317 | */ | |
01d5d965 | 6318 | error = jbd2_journal_flush(journal, 0); |
bb044576 TT |
6319 | if (error < 0) |
6320 | goto out; | |
c642dc9e ES |
6321 | |
6322 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
e2b911c5 | 6323 | ext4_clear_feature_journal_needs_recovery(sb); |
02f310fc JK |
6324 | if (ext4_orphan_file_empty(sb)) |
6325 | ext4_clear_feature_orphan_present(sb); | |
bb044576 | 6326 | } |
9ca92389 | 6327 | |
4392fbc4 | 6328 | error = ext4_commit_super(sb); |
6b0310fb | 6329 | out: |
bb044576 TT |
6330 | if (journal) |
6331 | /* we rely on upper layer to stop further updates */ | |
6332 | jbd2_journal_unlock_updates(journal); | |
6b0310fb | 6333 | return error; |
ac27a0ec DK |
6334 | } |
6335 | ||
6336 | /* | |
6337 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
6338 | * flag here, even though the filesystem is not technically dirty yet. | |
6339 | */ | |
c4be0c1d | 6340 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 6341 | { |
bc98a42c | 6342 | if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) |
9ca92389 TT |
6343 | return 0; |
6344 | ||
c642dc9e ES |
6345 | if (EXT4_SB(sb)->s_journal) { |
6346 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
e2b911c5 | 6347 | ext4_set_feature_journal_needs_recovery(sb); |
02f310fc JK |
6348 | if (ext4_has_feature_orphan_file(sb)) |
6349 | ext4_set_feature_orphan_present(sb); | |
c642dc9e ES |
6350 | } |
6351 | ||
4392fbc4 | 6352 | ext4_commit_super(sb); |
c4be0c1d | 6353 | return 0; |
ac27a0ec DK |
6354 | } |
6355 | ||
673c6100 TT |
6356 | /* |
6357 | * Structure to save mount options for ext4_remount's benefit | |
6358 | */ | |
6359 | struct ext4_mount_options { | |
6360 | unsigned long s_mount_opt; | |
a2595b8a | 6361 | unsigned long s_mount_opt2; |
08cefc7a EB |
6362 | kuid_t s_resuid; |
6363 | kgid_t s_resgid; | |
673c6100 TT |
6364 | unsigned long s_commit_interval; |
6365 | u32 s_min_batch_time, s_max_batch_time; | |
6366 | #ifdef CONFIG_QUOTA | |
6367 | int s_jquota_fmt; | |
a2d4a646 | 6368 | char *s_qf_names[EXT4_MAXQUOTAS]; |
673c6100 TT |
6369 | #endif |
6370 | }; | |
6371 | ||
960e0ab6 | 6372 | static int __ext4_remount(struct fs_context *fc, struct super_block *sb) |
ac27a0ec | 6373 | { |
7edfd85b | 6374 | struct ext4_fs_context *ctx = fc->fs_private; |
2b2d6d01 | 6375 | struct ext4_super_block *es; |
617ba13b | 6376 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
960e0ab6 | 6377 | unsigned long old_sb_flags; |
617ba13b | 6378 | struct ext4_mount_options old_opts; |
8a266467 | 6379 | ext4_group_t g; |
c5e06d10 | 6380 | int err = 0; |
ac27a0ec | 6381 | #ifdef CONFIG_QUOTA |
3bbef91b | 6382 | int enable_quota = 0; |
03dafb5f | 6383 | int i, j; |
33458eab | 6384 | char *to_free[EXT4_MAXQUOTAS]; |
ac27a0ec DK |
6385 | #endif |
6386 | ||
21ac738e | 6387 | |
ac27a0ec DK |
6388 | /* Store the original options */ |
6389 | old_sb_flags = sb->s_flags; | |
6390 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
a2595b8a | 6391 | old_opts.s_mount_opt2 = sbi->s_mount_opt2; |
ac27a0ec DK |
6392 | old_opts.s_resuid = sbi->s_resuid; |
6393 | old_opts.s_resgid = sbi->s_resgid; | |
6394 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
6395 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
6396 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
6397 | #ifdef CONFIG_QUOTA |
6398 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
a2d4a646 | 6399 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 6400 | if (sbi->s_qf_names[i]) { |
33458eab TT |
6401 | char *qf_name = get_qf_name(sb, sbi, i); |
6402 | ||
6403 | old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); | |
03dafb5f CG |
6404 | if (!old_opts.s_qf_names[i]) { |
6405 | for (j = 0; j < i; j++) | |
6406 | kfree(old_opts.s_qf_names[j]); | |
6407 | return -ENOMEM; | |
6408 | } | |
6409 | } else | |
6410 | old_opts.s_qf_names[i] = NULL; | |
ac27a0ec | 6411 | #endif |
e4e58e5d OM |
6412 | if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { |
6413 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) | |
6414 | ctx->journal_ioprio = | |
6415 | sbi->s_journal->j_task->io_context->ioprio; | |
6416 | else | |
6417 | ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; | |
6418 | ||
6419 | } | |
ac27a0ec | 6420 | |
7edfd85b | 6421 | ext4_apply_options(fc, sb); |
ac27a0ec | 6422 | |
6b992ff2 | 6423 | if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ |
c6d3d56d DW |
6424 | test_opt(sb, JOURNAL_CHECKSUM)) { |
6425 | ext4_msg(sb, KERN_ERR, "changing journal_checksum " | |
2d5b86e0 ES |
6426 | "during remount not supported; ignoring"); |
6427 | sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; | |
6b992ff2 DW |
6428 | } |
6429 | ||
6ae6514b PS |
6430 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { |
6431 | if (test_opt2(sb, EXPLICIT_DELALLOC)) { | |
6432 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6433 | "both data=journal and delalloc"); | |
6434 | err = -EINVAL; | |
6435 | goto restore_opts; | |
6436 | } | |
6437 | if (test_opt(sb, DIOREAD_NOLOCK)) { | |
6438 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6439 | "both data=journal and dioread_nolock"); | |
6440 | err = -EINVAL; | |
6441 | goto restore_opts; | |
6442 | } | |
ab04df78 JK |
6443 | } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { |
6444 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { | |
6445 | ext4_msg(sb, KERN_ERR, "can't mount with " | |
6446 | "journal_async_commit in data=ordered mode"); | |
6447 | err = -EINVAL; | |
6448 | goto restore_opts; | |
6449 | } | |
923ae0ff RZ |
6450 | } |
6451 | ||
cdb7ee4c TE |
6452 | if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { |
6453 | ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); | |
6454 | err = -EINVAL; | |
6455 | goto restore_opts; | |
6456 | } | |
6457 | ||
9b5f6c9b | 6458 | if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) |
124e7c61 | 6459 | ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); |
ac27a0ec | 6460 | |
1751e8a6 LT |
6461 | sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | |
6462 | (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); | |
ac27a0ec DK |
6463 | |
6464 | es = sbi->s_es; | |
6465 | ||
b3881f74 | 6466 | if (sbi->s_journal) { |
0390131b | 6467 | ext4_init_journal_params(sb, sbi->s_journal); |
7edfd85b | 6468 | set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); |
b3881f74 | 6469 | } |
ac27a0ec | 6470 | |
c92dc856 JK |
6471 | /* Flush outstanding errors before changing fs state */ |
6472 | flush_work(&sbi->s_error_work); | |
6473 | ||
960e0ab6 | 6474 | if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { |
9b5f6c9b | 6475 | if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { |
ac27a0ec DK |
6476 | err = -EROFS; |
6477 | goto restore_opts; | |
6478 | } | |
6479 | ||
960e0ab6 | 6480 | if (fc->sb_flags & SB_RDONLY) { |
38c03b34 TT |
6481 | err = sync_filesystem(sb); |
6482 | if (err < 0) | |
6483 | goto restore_opts; | |
0f0dd62f CH |
6484 | err = dquot_suspend(sb, -1); |
6485 | if (err < 0) | |
c79d967d | 6486 | goto restore_opts; |
c79d967d | 6487 | |
ac27a0ec DK |
6488 | /* |
6489 | * First of all, the unconditional stuff we have to do | |
6490 | * to disable replay of the journal when we next remount | |
6491 | */ | |
1751e8a6 | 6492 | sb->s_flags |= SB_RDONLY; |
ac27a0ec DK |
6493 | |
6494 | /* | |
6495 | * OK, test if we are remounting a valid rw partition | |
6496 | * readonly, and if so set the rdonly flag and then | |
6497 | * mark the partition as valid again. | |
6498 | */ | |
617ba13b MC |
6499 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
6500 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
6501 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
6502 | ||
11215630 JK |
6503 | if (sbi->s_journal) { |
6504 | /* | |
6505 | * We let remount-ro finish even if marking fs | |
6506 | * as clean failed... | |
6507 | */ | |
0390131b | 6508 | ext4_mark_recovery_complete(sb, es); |
11215630 | 6509 | } |
ac27a0ec | 6510 | } else { |
a13fb1a4 | 6511 | /* Make sure we can mount this feature set readwrite */ |
e2b911c5 | 6512 | if (ext4_has_feature_readonly(sb) || |
2cb5cc8b | 6513 | !ext4_feature_set_ok(sb, 0)) { |
ac27a0ec DK |
6514 | err = -EROFS; |
6515 | goto restore_opts; | |
6516 | } | |
8a266467 TT |
6517 | /* |
6518 | * Make sure the group descriptor checksums | |
0b8e58a1 | 6519 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
6520 | */ |
6521 | for (g = 0; g < sbi->s_groups_count; g++) { | |
6522 | struct ext4_group_desc *gdp = | |
6523 | ext4_get_group_desc(sb, g, NULL); | |
6524 | ||
feb0ab32 | 6525 | if (!ext4_group_desc_csum_verify(sb, g, gdp)) { |
b31e1552 ES |
6526 | ext4_msg(sb, KERN_ERR, |
6527 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
e2b911c5 | 6528 | g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), |
8a266467 | 6529 | le16_to_cpu(gdp->bg_checksum)); |
6a797d27 | 6530 | err = -EFSBADCRC; |
8a266467 TT |
6531 | goto restore_opts; |
6532 | } | |
6533 | } | |
6534 | ||
ead6596b ES |
6535 | /* |
6536 | * If we have an unprocessed orphan list hanging | |
6537 | * around from a previously readonly bdev mount, | |
6538 | * require a full umount/remount for now. | |
6539 | */ | |
02f310fc | 6540 | if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { |
b31e1552 | 6541 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
6542 | "remount RDWR because of unprocessed " |
6543 | "orphan inode list. Please " | |
b31e1552 | 6544 | "umount/remount instead"); |
ead6596b ES |
6545 | err = -EINVAL; |
6546 | goto restore_opts; | |
6547 | } | |
6548 | ||
ac27a0ec DK |
6549 | /* |
6550 | * Mounting a RDONLY partition read-write, so reread | |
6551 | * and store the current valid flag. (It may have | |
6552 | * been changed by e2fsck since we originally mounted | |
6553 | * the partition.) | |
6554 | */ | |
11215630 JK |
6555 | if (sbi->s_journal) { |
6556 | err = ext4_clear_journal_err(sb, es); | |
6557 | if (err) | |
6558 | goto restore_opts; | |
6559 | } | |
c878bea3 TT |
6560 | sbi->s_mount_state = (le16_to_cpu(es->s_state) & |
6561 | ~EXT4_FC_REPLAY); | |
c89128a0 JK |
6562 | |
6563 | err = ext4_setup_super(sb, es, 0); | |
6564 | if (err) | |
6565 | goto restore_opts; | |
6566 | ||
6567 | sb->s_flags &= ~SB_RDONLY; | |
e2b911c5 | 6568 | if (ext4_has_feature_mmp(sb)) |
c5e06d10 JL |
6569 | if (ext4_multi_mount_protect(sb, |
6570 | le64_to_cpu(es->s_mmp_block))) { | |
6571 | err = -EROFS; | |
6572 | goto restore_opts; | |
6573 | } | |
3bbef91b | 6574 | #ifdef CONFIG_QUOTA |
c79d967d | 6575 | enable_quota = 1; |
3bbef91b | 6576 | #endif |
ac27a0ec DK |
6577 | } |
6578 | } | |
bfff6873 LC |
6579 | |
6580 | /* | |
6581 | * Reinitialize lazy itable initialization thread based on | |
6582 | * current settings | |
6583 | */ | |
bc98a42c | 6584 | if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) |
bfff6873 LC |
6585 | ext4_unregister_li_request(sb); |
6586 | else { | |
6587 | ext4_group_t first_not_zeroed; | |
6588 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
6589 | ext4_register_li_request(sb, first_not_zeroed); | |
6590 | } | |
6591 | ||
0f5bde1d JK |
6592 | /* |
6593 | * Handle creation of system zone data early because it can fail. | |
6594 | * Releasing of existing data is done when we are sure remount will | |
6595 | * succeed. | |
6596 | */ | |
dd0db94f | 6597 | if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { |
0f5bde1d JK |
6598 | err = ext4_setup_system_zone(sb); |
6599 | if (err) | |
6600 | goto restore_opts; | |
6601 | } | |
d176b1f6 | 6602 | |
c89128a0 | 6603 | if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { |
4392fbc4 | 6604 | err = ext4_commit_super(sb); |
c89128a0 JK |
6605 | if (err) |
6606 | goto restore_opts; | |
6607 | } | |
0390131b | 6608 | |
ac27a0ec DK |
6609 | #ifdef CONFIG_QUOTA |
6610 | /* Release old quota file names */ | |
a2d4a646 | 6611 | for (i = 0; i < EXT4_MAXQUOTAS; i++) |
03dafb5f | 6612 | kfree(old_opts.s_qf_names[i]); |
7c319d32 AK |
6613 | if (enable_quota) { |
6614 | if (sb_any_quota_suspended(sb)) | |
6615 | dquot_resume(sb, -1); | |
e2b911c5 | 6616 | else if (ext4_has_feature_quota(sb)) { |
7c319d32 | 6617 | err = ext4_enable_quotas(sb); |
07724f98 | 6618 | if (err) |
7c319d32 | 6619 | goto restore_opts; |
7c319d32 AK |
6620 | } |
6621 | } | |
ac27a0ec | 6622 | #endif |
dd0db94f | 6623 | if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) |
0f5bde1d | 6624 | ext4_release_system_zone(sb); |
d4c402d9 | 6625 | |
61bb4a1c TT |
6626 | if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) |
6627 | ext4_stop_mmpd(sbi); | |
6628 | ||
ac27a0ec | 6629 | return 0; |
0b8e58a1 | 6630 | |
ac27a0ec DK |
6631 | restore_opts: |
6632 | sb->s_flags = old_sb_flags; | |
6633 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
a2595b8a | 6634 | sbi->s_mount_opt2 = old_opts.s_mount_opt2; |
ac27a0ec DK |
6635 | sbi->s_resuid = old_opts.s_resuid; |
6636 | sbi->s_resgid = old_opts.s_resgid; | |
6637 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
6638 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
6639 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
dd0db94f | 6640 | if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) |
0f5bde1d | 6641 | ext4_release_system_zone(sb); |
ac27a0ec DK |
6642 | #ifdef CONFIG_QUOTA |
6643 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
a2d4a646 | 6644 | for (i = 0; i < EXT4_MAXQUOTAS; i++) { |
33458eab TT |
6645 | to_free[i] = get_qf_name(sb, sbi, i); |
6646 | rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); | |
ac27a0ec | 6647 | } |
33458eab TT |
6648 | synchronize_rcu(); |
6649 | for (i = 0; i < EXT4_MAXQUOTAS; i++) | |
6650 | kfree(to_free[i]); | |
ac27a0ec | 6651 | #endif |
61bb4a1c TT |
6652 | if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) |
6653 | ext4_stop_mmpd(sbi); | |
ac27a0ec DK |
6654 | return err; |
6655 | } | |
6656 | ||
cebe85d5 | 6657 | static int ext4_reconfigure(struct fs_context *fc) |
7edfd85b | 6658 | { |
cebe85d5 | 6659 | struct super_block *sb = fc->root->d_sb; |
7edfd85b LC |
6660 | int ret; |
6661 | ||
cebe85d5 | 6662 | fc->s_fs_info = EXT4_SB(sb); |
7edfd85b | 6663 | |
cebe85d5 | 6664 | ret = ext4_check_opt_consistency(fc, sb); |
7edfd85b | 6665 | if (ret < 0) |
cebe85d5 | 6666 | return ret; |
7edfd85b | 6667 | |
960e0ab6 | 6668 | ret = __ext4_remount(fc, sb); |
7edfd85b | 6669 | if (ret < 0) |
cebe85d5 | 6670 | return ret; |
7edfd85b | 6671 | |
bb0fbc78 LC |
6672 | ext4_msg(sb, KERN_INFO, "re-mounted %pU. Quota mode: %s.", |
6673 | &sb->s_uuid, ext4_quota_mode(sb)); | |
7edfd85b | 6674 | |
7edfd85b | 6675 | return 0; |
7edfd85b LC |
6676 | } |
6677 | ||
689c958c LX |
6678 | #ifdef CONFIG_QUOTA |
6679 | static int ext4_statfs_project(struct super_block *sb, | |
6680 | kprojid_t projid, struct kstatfs *buf) | |
6681 | { | |
6682 | struct kqid qid; | |
6683 | struct dquot *dquot; | |
6684 | u64 limit; | |
6685 | u64 curblock; | |
6686 | ||
6687 | qid = make_kqid_projid(projid); | |
6688 | dquot = dqget(sb, qid); | |
6689 | if (IS_ERR(dquot)) | |
6690 | return PTR_ERR(dquot); | |
7b9ca4c6 | 6691 | spin_lock(&dquot->dq_dqb_lock); |
689c958c | 6692 | |
a08fe66e CX |
6693 | limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, |
6694 | dquot->dq_dqb.dqb_bhardlimit); | |
57c32ea4 CX |
6695 | limit >>= sb->s_blocksize_bits; |
6696 | ||
689c958c | 6697 | if (limit && buf->f_blocks > limit) { |
f06925c7 KK |
6698 | curblock = (dquot->dq_dqb.dqb_curspace + |
6699 | dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; | |
689c958c LX |
6700 | buf->f_blocks = limit; |
6701 | buf->f_bfree = buf->f_bavail = | |
6702 | (buf->f_blocks > curblock) ? | |
6703 | (buf->f_blocks - curblock) : 0; | |
6704 | } | |
6705 | ||
a08fe66e CX |
6706 | limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, |
6707 | dquot->dq_dqb.dqb_ihardlimit); | |
689c958c LX |
6708 | if (limit && buf->f_files > limit) { |
6709 | buf->f_files = limit; | |
6710 | buf->f_ffree = | |
6711 | (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? | |
6712 | (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; | |
6713 | } | |
6714 | ||
7b9ca4c6 | 6715 | spin_unlock(&dquot->dq_dqb_lock); |
689c958c LX |
6716 | dqput(dquot); |
6717 | return 0; | |
6718 | } | |
6719 | #endif | |
6720 | ||
2b2d6d01 | 6721 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
6722 | { |
6723 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
6724 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
6725 | struct ext4_super_block *es = sbi->s_es; | |
27dd4385 | 6726 | ext4_fsblk_t overhead = 0, resv_blocks; |
d02a9391 | 6727 | s64 bfree; |
27dd4385 | 6728 | resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); |
ac27a0ec | 6729 | |
952fc18e TT |
6730 | if (!test_opt(sb, MINIX_DF)) |
6731 | overhead = sbi->s_overhead; | |
ac27a0ec | 6732 | |
617ba13b | 6733 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 6734 | buf->f_bsize = sb->s_blocksize; |
b72f78cb | 6735 | buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); |
57042651 TT |
6736 | bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - |
6737 | percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); | |
d02a9391 | 6738 | /* prevent underflow in case that few free space is available */ |
57042651 | 6739 | buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); |
27dd4385 LC |
6740 | buf->f_bavail = buf->f_bfree - |
6741 | (ext4_r_blocks_count(es) + resv_blocks); | |
6742 | if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) | |
ac27a0ec DK |
6743 | buf->f_bavail = 0; |
6744 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 6745 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 6746 | buf->f_namelen = EXT4_NAME_LEN; |
9591c3a3 | 6747 | buf->f_fsid = uuid_to_fsid(es->s_uuid); |
0b8e58a1 | 6748 | |
689c958c LX |
6749 | #ifdef CONFIG_QUOTA |
6750 | if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && | |
6751 | sb_has_quota_limits_enabled(sb, PRJQUOTA)) | |
6752 | ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); | |
6753 | #endif | |
ac27a0ec DK |
6754 | return 0; |
6755 | } | |
6756 | ||
ac27a0ec DK |
6757 | |
6758 | #ifdef CONFIG_QUOTA | |
6759 | ||
bc8230ee JK |
6760 | /* |
6761 | * Helper functions so that transaction is started before we acquire dqio_sem | |
6762 | * to keep correct lock ordering of transaction > dqio_sem | |
6763 | */ | |
ac27a0ec DK |
6764 | static inline struct inode *dquot_to_inode(struct dquot *dquot) |
6765 | { | |
4c376dca | 6766 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; |
ac27a0ec DK |
6767 | } |
6768 | ||
617ba13b | 6769 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
6770 | { |
6771 | int ret, err; | |
6772 | handle_t *handle; | |
6773 | struct inode *inode; | |
6774 | ||
6775 | inode = dquot_to_inode(dquot); | |
9924a92a | 6776 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
0b8e58a1 | 6777 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
6778 | if (IS_ERR(handle)) |
6779 | return PTR_ERR(handle); | |
6780 | ret = dquot_commit(dquot); | |
617ba13b | 6781 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
6782 | if (!ret) |
6783 | ret = err; | |
6784 | return ret; | |
6785 | } | |
6786 | ||
617ba13b | 6787 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
6788 | { |
6789 | int ret, err; | |
6790 | handle_t *handle; | |
6791 | ||
9924a92a | 6792 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 6793 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
6794 | if (IS_ERR(handle)) |
6795 | return PTR_ERR(handle); | |
6796 | ret = dquot_acquire(dquot); | |
617ba13b | 6797 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
6798 | if (!ret) |
6799 | ret = err; | |
6800 | return ret; | |
6801 | } | |
6802 | ||
617ba13b | 6803 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
6804 | { |
6805 | int ret, err; | |
6806 | handle_t *handle; | |
6807 | ||
9924a92a | 6808 | handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, |
0b8e58a1 | 6809 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
6810 | if (IS_ERR(handle)) { |
6811 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
6812 | dquot_release(dquot); | |
ac27a0ec | 6813 | return PTR_ERR(handle); |
9c3013e9 | 6814 | } |
ac27a0ec | 6815 | ret = dquot_release(dquot); |
617ba13b | 6816 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
6817 | if (!ret) |
6818 | ret = err; | |
6819 | return ret; | |
6820 | } | |
6821 | ||
617ba13b | 6822 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 6823 | { |
262b4662 | 6824 | struct super_block *sb = dquot->dq_sb; |
262b4662 | 6825 | |
f177ee08 | 6826 | if (ext4_is_quota_journalled(sb)) { |
ac27a0ec | 6827 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 6828 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
6829 | } else { |
6830 | return dquot_mark_dquot_dirty(dquot); | |
6831 | } | |
6832 | } | |
6833 | ||
617ba13b | 6834 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
6835 | { |
6836 | int ret, err; | |
6837 | handle_t *handle; | |
6838 | ||
6839 | /* Data block + inode block */ | |
f9c1f248 | 6840 | handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); |
ac27a0ec DK |
6841 | if (IS_ERR(handle)) |
6842 | return PTR_ERR(handle); | |
6843 | ret = dquot_commit_info(sb, type); | |
617ba13b | 6844 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
6845 | if (!ret) |
6846 | ret = err; | |
6847 | return ret; | |
6848 | } | |
6849 | ||
daf647d2 TT |
6850 | static void lockdep_set_quota_inode(struct inode *inode, int subclass) |
6851 | { | |
6852 | struct ext4_inode_info *ei = EXT4_I(inode); | |
6853 | ||
6854 | /* The first argument of lockdep_set_subclass has to be | |
6855 | * *exactly* the same as the argument to init_rwsem() --- in | |
6856 | * this case, in init_once() --- or lockdep gets unhappy | |
6857 | * because the name of the lock is set using the | |
6858 | * stringification of the argument to init_rwsem(). | |
6859 | */ | |
6860 | (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ | |
6861 | lockdep_set_subclass(&ei->i_data_sem, subclass); | |
6862 | } | |
6863 | ||
ac27a0ec DK |
6864 | /* |
6865 | * Standard function to be called on quota_on | |
6866 | */ | |
617ba13b | 6867 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
8c54ca9c | 6868 | const struct path *path) |
ac27a0ec DK |
6869 | { |
6870 | int err; | |
ac27a0ec DK |
6871 | |
6872 | if (!test_opt(sb, QUOTA)) | |
6873 | return -EINVAL; | |
0623543b | 6874 | |
ac27a0ec | 6875 | /* Quotafile not on the same filesystem? */ |
d8c9584e | 6876 | if (path->dentry->d_sb != sb) |
ac27a0ec | 6877 | return -EXDEV; |
e0770e91 JK |
6878 | |
6879 | /* Quota already enabled for this file? */ | |
6880 | if (IS_NOQUOTA(d_inode(path->dentry))) | |
6881 | return -EBUSY; | |
6882 | ||
0623543b JK |
6883 | /* Journaling quota? */ |
6884 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 6885 | /* Quotafile not in fs root? */ |
f00c9e44 | 6886 | if (path->dentry->d_parent != sb->s_root) |
b31e1552 ES |
6887 | ext4_msg(sb, KERN_WARNING, |
6888 | "Quota file not on filesystem root. " | |
6889 | "Journaled quota will not work"); | |
91389240 JK |
6890 | sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; |
6891 | } else { | |
6892 | /* | |
6893 | * Clear the flag just in case mount options changed since | |
6894 | * last time. | |
6895 | */ | |
6896 | sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; | |
2b2d6d01 | 6897 | } |
0623543b | 6898 | |
daf647d2 TT |
6899 | lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); |
6900 | err = dquot_quota_on(sb, type, format_id, path); | |
15fc69bb | 6901 | if (!err) { |
957153fc JK |
6902 | struct inode *inode = d_inode(path->dentry); |
6903 | handle_t *handle; | |
6904 | ||
61a92987 JK |
6905 | /* |
6906 | * Set inode flags to prevent userspace from messing with quota | |
6907 | * files. If this fails, we return success anyway since quotas | |
6908 | * are already enabled and this is not a hard failure. | |
6909 | */ | |
957153fc JK |
6910 | inode_lock(inode); |
6911 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); | |
6912 | if (IS_ERR(handle)) | |
6913 | goto unlock_inode; | |
6914 | EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; | |
6915 | inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, | |
6916 | S_NOATIME | S_IMMUTABLE); | |
4209ae12 | 6917 | err = ext4_mark_inode_dirty(handle, inode); |
957153fc JK |
6918 | ext4_journal_stop(handle); |
6919 | unlock_inode: | |
6920 | inode_unlock(inode); | |
15fc69bb JK |
6921 | if (err) |
6922 | dquot_quota_off(sb, type); | |
957153fc | 6923 | } |
15fc69bb JK |
6924 | if (err) |
6925 | lockdep_set_quota_inode(path->dentry->d_inode, | |
6926 | I_DATA_SEM_NORMAL); | |
daf647d2 | 6927 | return err; |
ac27a0ec DK |
6928 | } |
6929 | ||
07342ec2 BL |
6930 | static inline bool ext4_check_quota_inum(int type, unsigned long qf_inum) |
6931 | { | |
6932 | switch (type) { | |
6933 | case USRQUOTA: | |
6934 | return qf_inum == EXT4_USR_QUOTA_INO; | |
6935 | case GRPQUOTA: | |
6936 | return qf_inum == EXT4_GRP_QUOTA_INO; | |
6937 | case PRJQUOTA: | |
6938 | return qf_inum >= EXT4_GOOD_OLD_FIRST_INO; | |
6939 | default: | |
6940 | BUG(); | |
6941 | } | |
6942 | } | |
6943 | ||
7c319d32 AK |
6944 | static int ext4_quota_enable(struct super_block *sb, int type, int format_id, |
6945 | unsigned int flags) | |
6946 | { | |
6947 | int err; | |
6948 | struct inode *qf_inode; | |
a2d4a646 | 6949 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 6950 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
6951 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
6952 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 AK |
6953 | }; |
6954 | ||
e2b911c5 | 6955 | BUG_ON(!ext4_has_feature_quota(sb)); |
7c319d32 AK |
6956 | |
6957 | if (!qf_inums[type]) | |
6958 | return -EPERM; | |
6959 | ||
07342ec2 BL |
6960 | if (!ext4_check_quota_inum(type, qf_inums[type])) { |
6961 | ext4_error(sb, "Bad quota inum: %lu, type: %d", | |
6962 | qf_inums[type], type); | |
6963 | return -EUCLEAN; | |
6964 | } | |
6965 | ||
8a363970 | 6966 | qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); |
7c319d32 | 6967 | if (IS_ERR(qf_inode)) { |
07342ec2 BL |
6968 | ext4_error(sb, "Bad quota inode: %lu, type: %d", |
6969 | qf_inums[type], type); | |
7c319d32 AK |
6970 | return PTR_ERR(qf_inode); |
6971 | } | |
6972 | ||
bcb13850 JK |
6973 | /* Don't account quota for quota files to avoid recursion */ |
6974 | qf_inode->i_flags |= S_NOQUOTA; | |
daf647d2 | 6975 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); |
7212b95e | 6976 | err = dquot_load_quota_inode(qf_inode, type, format_id, flags); |
daf647d2 TT |
6977 | if (err) |
6978 | lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); | |
61157b24 | 6979 | iput(qf_inode); |
7c319d32 AK |
6980 | |
6981 | return err; | |
6982 | } | |
6983 | ||
6984 | /* Enable usage tracking for all quota types. */ | |
25c6d98f | 6985 | int ext4_enable_quotas(struct super_block *sb) |
7c319d32 AK |
6986 | { |
6987 | int type, err = 0; | |
a2d4a646 | 6988 | unsigned long qf_inums[EXT4_MAXQUOTAS] = { |
7c319d32 | 6989 | le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), |
689c958c LX |
6990 | le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), |
6991 | le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) | |
7c319d32 | 6992 | }; |
49da9392 JK |
6993 | bool quota_mopt[EXT4_MAXQUOTAS] = { |
6994 | test_opt(sb, USRQUOTA), | |
6995 | test_opt(sb, GRPQUOTA), | |
6996 | test_opt(sb, PRJQUOTA), | |
6997 | }; | |
7c319d32 | 6998 | |
91389240 | 6999 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; |
a2d4a646 | 7000 | for (type = 0; type < EXT4_MAXQUOTAS; type++) { |
7c319d32 AK |
7001 | if (qf_inums[type]) { |
7002 | err = ext4_quota_enable(sb, type, QFMT_VFS_V1, | |
49da9392 JK |
7003 | DQUOT_USAGE_ENABLED | |
7004 | (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); | |
7c319d32 AK |
7005 | if (err) { |
7006 | ext4_warning(sb, | |
72ba7450 | 7007 | "Failed to enable quota tracking " |
07342ec2 BL |
7008 | "(type=%d, err=%d, ino=%lu). " |
7009 | "Please run e2fsck to fix.", type, | |
7010 | err, qf_inums[type]); | |
4013d47a JK |
7011 | for (type--; type >= 0; type--) { |
7012 | struct inode *inode; | |
7013 | ||
7014 | inode = sb_dqopt(sb)->files[type]; | |
7015 | if (inode) | |
7016 | inode = igrab(inode); | |
7f144fd0 | 7017 | dquot_quota_off(sb, type); |
4013d47a JK |
7018 | if (inode) { |
7019 | lockdep_set_quota_inode(inode, | |
7020 | I_DATA_SEM_NORMAL); | |
7021 | iput(inode); | |
7022 | } | |
7023 | } | |
7f144fd0 | 7024 | |
7c319d32 AK |
7025 | return err; |
7026 | } | |
7027 | } | |
7028 | } | |
7029 | return 0; | |
7030 | } | |
7031 | ||
ca0e05e4 DM |
7032 | static int ext4_quota_off(struct super_block *sb, int type) |
7033 | { | |
21f97697 JK |
7034 | struct inode *inode = sb_dqopt(sb)->files[type]; |
7035 | handle_t *handle; | |
957153fc | 7036 | int err; |
21f97697 | 7037 | |
87009d86 DM |
7038 | /* Force all delayed allocation blocks to be allocated. |
7039 | * Caller already holds s_umount sem */ | |
7040 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 7041 | sync_filesystem(sb); |
ca0e05e4 | 7042 | |
957153fc | 7043 | if (!inode || !igrab(inode)) |
0b268590 AG |
7044 | goto out; |
7045 | ||
957153fc | 7046 | err = dquot_quota_off(sb, type); |
964edf66 | 7047 | if (err || ext4_has_feature_quota(sb)) |
957153fc JK |
7048 | goto out_put; |
7049 | ||
7050 | inode_lock(inode); | |
61a92987 JK |
7051 | /* |
7052 | * Update modification times of quota files when userspace can | |
7053 | * start looking at them. If we fail, we return success anyway since | |
7054 | * this is not a hard failure and quotas are already disabled. | |
7055 | */ | |
9924a92a | 7056 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); |
4209ae12 HS |
7057 | if (IS_ERR(handle)) { |
7058 | err = PTR_ERR(handle); | |
957153fc | 7059 | goto out_unlock; |
4209ae12 | 7060 | } |
957153fc JK |
7061 | EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); |
7062 | inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); | |
eeca7ea1 | 7063 | inode->i_mtime = inode->i_ctime = current_time(inode); |
4209ae12 | 7064 | err = ext4_mark_inode_dirty(handle, inode); |
21f97697 | 7065 | ext4_journal_stop(handle); |
957153fc JK |
7066 | out_unlock: |
7067 | inode_unlock(inode); | |
7068 | out_put: | |
964edf66 | 7069 | lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); |
957153fc JK |
7070 | iput(inode); |
7071 | return err; | |
21f97697 | 7072 | out: |
ca0e05e4 DM |
7073 | return dquot_quota_off(sb, type); |
7074 | } | |
7075 | ||
ac27a0ec DK |
7076 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
7077 | * acquiring the locks... As quota files are never truncated and quota code | |
25985edc | 7078 | * itself serializes the operations (and no one else should touch the files) |
ac27a0ec | 7079 | * we don't have to be afraid of races */ |
617ba13b | 7080 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
7081 | size_t len, loff_t off) |
7082 | { | |
7083 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 7084 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
7085 | int offset = off & (sb->s_blocksize - 1); |
7086 | int tocopy; | |
7087 | size_t toread; | |
7088 | struct buffer_head *bh; | |
7089 | loff_t i_size = i_size_read(inode); | |
7090 | ||
7091 | if (off > i_size) | |
7092 | return 0; | |
7093 | if (off+len > i_size) | |
7094 | len = i_size-off; | |
7095 | toread = len; | |
7096 | while (toread > 0) { | |
66267814 | 7097 | tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread); |
1c215028 TT |
7098 | bh = ext4_bread(NULL, inode, blk, 0); |
7099 | if (IS_ERR(bh)) | |
7100 | return PTR_ERR(bh); | |
ac27a0ec DK |
7101 | if (!bh) /* A hole? */ |
7102 | memset(data, 0, tocopy); | |
7103 | else | |
7104 | memcpy(data, bh->b_data+offset, tocopy); | |
7105 | brelse(bh); | |
7106 | offset = 0; | |
7107 | toread -= tocopy; | |
7108 | data += tocopy; | |
7109 | blk++; | |
7110 | } | |
7111 | return len; | |
7112 | } | |
7113 | ||
7114 | /* Write to quotafile (we know the transaction is already started and has | |
7115 | * enough credits) */ | |
617ba13b | 7116 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
7117 | const char *data, size_t len, loff_t off) |
7118 | { | |
7119 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 7120 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
4209ae12 | 7121 | int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); |
c5e298ae | 7122 | int retries = 0; |
ac27a0ec DK |
7123 | struct buffer_head *bh; |
7124 | handle_t *handle = journal_current_handle(); | |
7125 | ||
380a0091 | 7126 | if (!handle) { |
b31e1552 ES |
7127 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
7128 | " cancelled because transaction is not started", | |
9c3013e9 JK |
7129 | (unsigned long long)off, (unsigned long long)len); |
7130 | return -EIO; | |
7131 | } | |
67eeb568 DM |
7132 | /* |
7133 | * Since we account only one data block in transaction credits, | |
7134 | * then it is impossible to cross a block boundary. | |
7135 | */ | |
7136 | if (sb->s_blocksize - offset < len) { | |
7137 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
7138 | " cancelled because not block aligned", | |
7139 | (unsigned long long)off, (unsigned long long)len); | |
7140 | return -EIO; | |
7141 | } | |
7142 | ||
c5e298ae TT |
7143 | do { |
7144 | bh = ext4_bread(handle, inode, blk, | |
7145 | EXT4_GET_BLOCKS_CREATE | | |
7146 | EXT4_GET_BLOCKS_METADATA_NOFAIL); | |
45586c70 | 7147 | } while (PTR_ERR(bh) == -ENOSPC && |
c5e298ae | 7148 | ext4_should_retry_alloc(inode->i_sb, &retries)); |
1c215028 TT |
7149 | if (IS_ERR(bh)) |
7150 | return PTR_ERR(bh); | |
67eeb568 DM |
7151 | if (!bh) |
7152 | goto out; | |
5d601255 | 7153 | BUFFER_TRACE(bh, "get write access"); |
188c299e | 7154 | err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); |
62d2b5f2 JK |
7155 | if (err) { |
7156 | brelse(bh); | |
1c215028 | 7157 | return err; |
ac27a0ec | 7158 | } |
67eeb568 DM |
7159 | lock_buffer(bh); |
7160 | memcpy(bh->b_data+offset, data, len); | |
7161 | flush_dcache_page(bh->b_page); | |
7162 | unlock_buffer(bh); | |
62d2b5f2 | 7163 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 7164 | brelse(bh); |
ac27a0ec | 7165 | out: |
67eeb568 DM |
7166 | if (inode->i_size < off + len) { |
7167 | i_size_write(inode, off + len); | |
617ba13b | 7168 | EXT4_I(inode)->i_disksize = inode->i_size; |
4209ae12 HS |
7169 | err2 = ext4_mark_inode_dirty(handle, inode); |
7170 | if (unlikely(err2 && !err)) | |
7171 | err = err2; | |
ac27a0ec | 7172 | } |
4209ae12 | 7173 | return err ? err : len; |
ac27a0ec | 7174 | } |
ac27a0ec DK |
7175 | #endif |
7176 | ||
c290ea01 | 7177 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) |
24b58424 TT |
7178 | static inline void register_as_ext2(void) |
7179 | { | |
7180 | int err = register_filesystem(&ext2_fs_type); | |
7181 | if (err) | |
7182 | printk(KERN_WARNING | |
7183 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
7184 | } | |
7185 | ||
7186 | static inline void unregister_as_ext2(void) | |
7187 | { | |
7188 | unregister_filesystem(&ext2_fs_type); | |
7189 | } | |
2035e776 TT |
7190 | |
7191 | static inline int ext2_feature_set_ok(struct super_block *sb) | |
7192 | { | |
e2b911c5 | 7193 | if (ext4_has_unknown_ext2_incompat_features(sb)) |
2035e776 | 7194 | return 0; |
bc98a42c | 7195 | if (sb_rdonly(sb)) |
2035e776 | 7196 | return 1; |
e2b911c5 | 7197 | if (ext4_has_unknown_ext2_ro_compat_features(sb)) |
2035e776 TT |
7198 | return 0; |
7199 | return 1; | |
7200 | } | |
24b58424 TT |
7201 | #else |
7202 | static inline void register_as_ext2(void) { } | |
7203 | static inline void unregister_as_ext2(void) { } | |
2035e776 | 7204 | static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } |
24b58424 TT |
7205 | #endif |
7206 | ||
24b58424 TT |
7207 | static inline void register_as_ext3(void) |
7208 | { | |
7209 | int err = register_filesystem(&ext3_fs_type); | |
7210 | if (err) | |
7211 | printk(KERN_WARNING | |
7212 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
7213 | } | |
7214 | ||
7215 | static inline void unregister_as_ext3(void) | |
7216 | { | |
7217 | unregister_filesystem(&ext3_fs_type); | |
7218 | } | |
2035e776 TT |
7219 | |
7220 | static inline int ext3_feature_set_ok(struct super_block *sb) | |
7221 | { | |
e2b911c5 | 7222 | if (ext4_has_unknown_ext3_incompat_features(sb)) |
2035e776 | 7223 | return 0; |
e2b911c5 | 7224 | if (!ext4_has_feature_journal(sb)) |
2035e776 | 7225 | return 0; |
bc98a42c | 7226 | if (sb_rdonly(sb)) |
2035e776 | 7227 | return 1; |
e2b911c5 | 7228 | if (ext4_has_unknown_ext3_ro_compat_features(sb)) |
2035e776 TT |
7229 | return 0; |
7230 | return 1; | |
7231 | } | |
24b58424 | 7232 | |
03010a33 | 7233 | static struct file_system_type ext4_fs_type = { |
cebe85d5 LC |
7234 | .owner = THIS_MODULE, |
7235 | .name = "ext4", | |
7236 | .init_fs_context = ext4_init_fs_context, | |
7237 | .parameters = ext4_param_specs, | |
7238 | .kill_sb = kill_block_super, | |
7239 | .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, | |
03010a33 | 7240 | }; |
7f78e035 | 7241 | MODULE_ALIAS_FS("ext4"); |
03010a33 | 7242 | |
e9e3bcec ES |
7243 | /* Shared across all ext4 file systems */ |
7244 | wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; | |
e9e3bcec | 7245 | |
5dabfc78 | 7246 | static int __init ext4_init_fs(void) |
ac27a0ec | 7247 | { |
e9e3bcec | 7248 | int i, err; |
c9de560d | 7249 | |
e294a537 | 7250 | ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); |
07c0c5d8 | 7251 | ext4_li_info = NULL; |
07c0c5d8 | 7252 | |
9a4c8019 | 7253 | /* Build-time check for flags consistency */ |
12e9b892 | 7254 | ext4_check_flag_values(); |
e9e3bcec | 7255 | |
e142d052 | 7256 | for (i = 0; i < EXT4_WQ_HASH_SZ; i++) |
e9e3bcec | 7257 | init_waitqueue_head(&ext4__ioend_wq[i]); |
e9e3bcec | 7258 | |
51865fda | 7259 | err = ext4_init_es(); |
6fd058f7 TT |
7260 | if (err) |
7261 | return err; | |
51865fda | 7262 | |
1dc0aa46 | 7263 | err = ext4_init_pending(); |
22cfe4b4 EB |
7264 | if (err) |
7265 | goto out7; | |
7266 | ||
7267 | err = ext4_init_post_read_processing(); | |
1dc0aa46 EW |
7268 | if (err) |
7269 | goto out6; | |
7270 | ||
51865fda ZL |
7271 | err = ext4_init_pageio(); |
7272 | if (err) | |
b5799018 | 7273 | goto out5; |
51865fda | 7274 | |
5dabfc78 | 7275 | err = ext4_init_system_zone(); |
bd2d0210 | 7276 | if (err) |
b5799018 | 7277 | goto out4; |
857ac889 | 7278 | |
b5799018 | 7279 | err = ext4_init_sysfs(); |
dd68314c | 7280 | if (err) |
b5799018 | 7281 | goto out3; |
857ac889 | 7282 | |
5dabfc78 | 7283 | err = ext4_init_mballoc(); |
c9de560d AT |
7284 | if (err) |
7285 | goto out2; | |
ac27a0ec DK |
7286 | err = init_inodecache(); |
7287 | if (err) | |
7288 | goto out1; | |
aa75f4d3 HS |
7289 | |
7290 | err = ext4_fc_init_dentry_cache(); | |
7291 | if (err) | |
7292 | goto out05; | |
7293 | ||
24b58424 | 7294 | register_as_ext3(); |
2035e776 | 7295 | register_as_ext2(); |
03010a33 | 7296 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
7297 | if (err) |
7298 | goto out; | |
bfff6873 | 7299 | |
ac27a0ec DK |
7300 | return 0; |
7301 | out: | |
24b58424 TT |
7302 | unregister_as_ext2(); |
7303 | unregister_as_ext3(); | |
ab047d51 | 7304 | ext4_fc_destroy_dentry_cache(); |
aa75f4d3 | 7305 | out05: |
ac27a0ec DK |
7306 | destroy_inodecache(); |
7307 | out1: | |
5dabfc78 | 7308 | ext4_exit_mballoc(); |
9c191f70 | 7309 | out2: |
b5799018 TT |
7310 | ext4_exit_sysfs(); |
7311 | out3: | |
5dabfc78 | 7312 | ext4_exit_system_zone(); |
b5799018 | 7313 | out4: |
5dabfc78 | 7314 | ext4_exit_pageio(); |
b5799018 | 7315 | out5: |
22cfe4b4 | 7316 | ext4_exit_post_read_processing(); |
1dc0aa46 | 7317 | out6: |
22cfe4b4 EB |
7318 | ext4_exit_pending(); |
7319 | out7: | |
51865fda ZL |
7320 | ext4_exit_es(); |
7321 | ||
ac27a0ec DK |
7322 | return err; |
7323 | } | |
7324 | ||
5dabfc78 | 7325 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 7326 | { |
bfff6873 | 7327 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
7328 | unregister_as_ext2(); |
7329 | unregister_as_ext3(); | |
03010a33 | 7330 | unregister_filesystem(&ext4_fs_type); |
ab047d51 | 7331 | ext4_fc_destroy_dentry_cache(); |
ac27a0ec | 7332 | destroy_inodecache(); |
5dabfc78 | 7333 | ext4_exit_mballoc(); |
b5799018 | 7334 | ext4_exit_sysfs(); |
5dabfc78 TT |
7335 | ext4_exit_system_zone(); |
7336 | ext4_exit_pageio(); | |
22cfe4b4 | 7337 | ext4_exit_post_read_processing(); |
dd12ed14 | 7338 | ext4_exit_es(); |
1dc0aa46 | 7339 | ext4_exit_pending(); |
ac27a0ec DK |
7340 | } |
7341 | ||
7342 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 7343 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 7344 | MODULE_LICENSE("GPL"); |
7ef79ad5 | 7345 | MODULE_SOFTDEP("pre: crc32c"); |
5dabfc78 TT |
7346 | module_init(ext4_init_fs) |
7347 | module_exit(ext4_exit_fs) |