Commit | Line | Data |
---|---|---|
ac27a0ec | 1 | /* |
617ba13b | 2 | * linux/fs/ext4/super.c |
ac27a0ec DK |
3 | * |
4 | * Copyright (C) 1992, 1993, 1994, 1995 | |
5 | * Remy Card (card@masi.ibp.fr) | |
6 | * Laboratoire MASI - Institut Blaise Pascal | |
7 | * Universite Pierre et Marie Curie (Paris VI) | |
8 | * | |
9 | * from | |
10 | * | |
11 | * linux/fs/minix/inode.c | |
12 | * | |
13 | * Copyright (C) 1991, 1992 Linus Torvalds | |
14 | * | |
15 | * Big-endian to little-endian byte-swapping/bitmaps by | |
16 | * David S. Miller (davem@caip.rutgers.edu), 1995 | |
17 | */ | |
18 | ||
19 | #include <linux/module.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/time.h> | |
c5ca7c76 | 23 | #include <linux/vmalloc.h> |
dab291af | 24 | #include <linux/jbd2.h> |
ac27a0ec DK |
25 | #include <linux/slab.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/blkdev.h> | |
28 | #include <linux/parser.h> | |
ac27a0ec | 29 | #include <linux/buffer_head.h> |
a5694255 | 30 | #include <linux/exportfs.h> |
ac27a0ec DK |
31 | #include <linux/vfs.h> |
32 | #include <linux/random.h> | |
33 | #include <linux/mount.h> | |
34 | #include <linux/namei.h> | |
35 | #include <linux/quotaops.h> | |
36 | #include <linux/seq_file.h> | |
9f6200bb | 37 | #include <linux/proc_fs.h> |
3197ebdb | 38 | #include <linux/ctype.h> |
1330593e | 39 | #include <linux/log2.h> |
717d50e4 | 40 | #include <linux/crc16.h> |
ac27a0ec DK |
41 | #include <asm/uaccess.h> |
42 | ||
bfff6873 LC |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
45 | ||
3dcf5451 CH |
46 | #include "ext4.h" |
47 | #include "ext4_jbd2.h" | |
ac27a0ec DK |
48 | #include "xattr.h" |
49 | #include "acl.h" | |
3661d286 | 50 | #include "mballoc.h" |
ac27a0ec | 51 | |
9bffad1e TT |
52 | #define CREATE_TRACE_POINTS |
53 | #include <trace/events/ext4.h> | |
54 | ||
1f109d5a | 55 | static struct proc_dir_entry *ext4_proc_root; |
3197ebdb | 56 | static struct kset *ext4_kset; |
bfff6873 LC |
57 | struct ext4_lazy_init *ext4_li_info; |
58 | struct mutex ext4_li_mtx; | |
857ac889 | 59 | struct ext4_features *ext4_feat; |
9f6200bb | 60 | |
617ba13b | 61 | static int ext4_load_journal(struct super_block *, struct ext4_super_block *, |
ac27a0ec | 62 | unsigned long journal_devnum); |
e2d67052 | 63 | static int ext4_commit_super(struct super_block *sb, int sync); |
2b2d6d01 TT |
64 | static void ext4_mark_recovery_complete(struct super_block *sb, |
65 | struct ext4_super_block *es); | |
66 | static void ext4_clear_journal_err(struct super_block *sb, | |
67 | struct ext4_super_block *es); | |
617ba13b | 68 | static int ext4_sync_fs(struct super_block *sb, int wait); |
2b2d6d01 | 69 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec | 70 | char nbuf[16]); |
2b2d6d01 TT |
71 | static int ext4_remount(struct super_block *sb, int *flags, char *data); |
72 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); | |
c4be0c1d | 73 | static int ext4_unfreeze(struct super_block *sb); |
2b2d6d01 | 74 | static void ext4_write_super(struct super_block *sb); |
c4be0c1d | 75 | static int ext4_freeze(struct super_block *sb); |
152a0836 AV |
76 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
77 | const char *dev_name, void *data); | |
bfff6873 LC |
78 | static void ext4_destroy_lazyinit_thread(void); |
79 | static void ext4_unregister_li_request(struct super_block *sb); | |
ac27a0ec | 80 | |
ba69f9ab JK |
81 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
82 | static struct file_system_type ext3_fs_type = { | |
83 | .owner = THIS_MODULE, | |
84 | .name = "ext3", | |
152a0836 | 85 | .mount = ext4_mount, |
ba69f9ab JK |
86 | .kill_sb = kill_block_super, |
87 | .fs_flags = FS_REQUIRES_DEV, | |
88 | }; | |
89 | #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) | |
90 | #else | |
91 | #define IS_EXT3_SB(sb) (0) | |
92 | #endif | |
bd81d8ee | 93 | |
8fadc143 AR |
94 | ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, |
95 | struct ext4_group_desc *bg) | |
bd81d8ee | 96 | { |
3a14589c | 97 | return le32_to_cpu(bg->bg_block_bitmap_lo) | |
8fadc143 | 98 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 99 | (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
100 | } |
101 | ||
8fadc143 AR |
102 | ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, |
103 | struct ext4_group_desc *bg) | |
bd81d8ee | 104 | { |
5272f837 | 105 | return le32_to_cpu(bg->bg_inode_bitmap_lo) | |
8fadc143 | 106 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 107 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); |
bd81d8ee LV |
108 | } |
109 | ||
8fadc143 AR |
110 | ext4_fsblk_t ext4_inode_table(struct super_block *sb, |
111 | struct ext4_group_desc *bg) | |
bd81d8ee | 112 | { |
5272f837 | 113 | return le32_to_cpu(bg->bg_inode_table_lo) | |
8fadc143 | 114 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? |
0b8e58a1 | 115 | (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); |
bd81d8ee LV |
116 | } |
117 | ||
560671a0 AK |
118 | __u32 ext4_free_blks_count(struct super_block *sb, |
119 | struct ext4_group_desc *bg) | |
120 | { | |
121 | return le16_to_cpu(bg->bg_free_blocks_count_lo) | | |
122 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 123 | (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); |
560671a0 AK |
124 | } |
125 | ||
126 | __u32 ext4_free_inodes_count(struct super_block *sb, | |
127 | struct ext4_group_desc *bg) | |
128 | { | |
129 | return le16_to_cpu(bg->bg_free_inodes_count_lo) | | |
130 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 131 | (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); |
560671a0 AK |
132 | } |
133 | ||
134 | __u32 ext4_used_dirs_count(struct super_block *sb, | |
135 | struct ext4_group_desc *bg) | |
136 | { | |
137 | return le16_to_cpu(bg->bg_used_dirs_count_lo) | | |
138 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 139 | (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); |
560671a0 AK |
140 | } |
141 | ||
142 | __u32 ext4_itable_unused_count(struct super_block *sb, | |
143 | struct ext4_group_desc *bg) | |
144 | { | |
145 | return le16_to_cpu(bg->bg_itable_unused_lo) | | |
146 | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? | |
0b8e58a1 | 147 | (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); |
560671a0 AK |
148 | } |
149 | ||
8fadc143 AR |
150 | void ext4_block_bitmap_set(struct super_block *sb, |
151 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 152 | { |
3a14589c | 153 | bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
154 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
155 | bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
156 | } |
157 | ||
8fadc143 AR |
158 | void ext4_inode_bitmap_set(struct super_block *sb, |
159 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 160 | { |
5272f837 | 161 | bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
162 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
163 | bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
164 | } |
165 | ||
8fadc143 AR |
166 | void ext4_inode_table_set(struct super_block *sb, |
167 | struct ext4_group_desc *bg, ext4_fsblk_t blk) | |
bd81d8ee | 168 | { |
5272f837 | 169 | bg->bg_inode_table_lo = cpu_to_le32((u32)blk); |
8fadc143 AR |
170 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) |
171 | bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); | |
bd81d8ee LV |
172 | } |
173 | ||
560671a0 AK |
174 | void ext4_free_blks_set(struct super_block *sb, |
175 | struct ext4_group_desc *bg, __u32 count) | |
176 | { | |
177 | bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); | |
178 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
179 | bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); | |
180 | } | |
181 | ||
182 | void ext4_free_inodes_set(struct super_block *sb, | |
183 | struct ext4_group_desc *bg, __u32 count) | |
184 | { | |
185 | bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); | |
186 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
187 | bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); | |
188 | } | |
189 | ||
190 | void ext4_used_dirs_set(struct super_block *sb, | |
191 | struct ext4_group_desc *bg, __u32 count) | |
192 | { | |
193 | bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); | |
194 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
195 | bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); | |
196 | } | |
197 | ||
198 | void ext4_itable_unused_set(struct super_block *sb, | |
199 | struct ext4_group_desc *bg, __u32 count) | |
200 | { | |
201 | bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); | |
202 | if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) | |
203 | bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); | |
204 | } | |
205 | ||
d3d1faf6 CW |
206 | |
207 | /* Just increment the non-pointer handle value */ | |
208 | static handle_t *ext4_get_nojournal(void) | |
209 | { | |
210 | handle_t *handle = current->journal_info; | |
211 | unsigned long ref_cnt = (unsigned long)handle; | |
212 | ||
213 | BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); | |
214 | ||
215 | ref_cnt++; | |
216 | handle = (handle_t *)ref_cnt; | |
217 | ||
218 | current->journal_info = handle; | |
219 | return handle; | |
220 | } | |
221 | ||
222 | ||
223 | /* Decrement the non-pointer handle value */ | |
224 | static void ext4_put_nojournal(handle_t *handle) | |
225 | { | |
226 | unsigned long ref_cnt = (unsigned long)handle; | |
227 | ||
228 | BUG_ON(ref_cnt == 0); | |
229 | ||
230 | ref_cnt--; | |
231 | handle = (handle_t *)ref_cnt; | |
232 | ||
233 | current->journal_info = handle; | |
234 | } | |
235 | ||
ac27a0ec | 236 | /* |
dab291af | 237 | * Wrappers for jbd2_journal_start/end. |
ac27a0ec DK |
238 | * |
239 | * The only special thing we need to do here is to make sure that all | |
240 | * journal_end calls result in the superblock being marked dirty, so | |
241 | * that sync() will call the filesystem's write_super callback if | |
242 | * appropriate. | |
243 | */ | |
617ba13b | 244 | handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) |
ac27a0ec DK |
245 | { |
246 | journal_t *journal; | |
247 | ||
248 | if (sb->s_flags & MS_RDONLY) | |
249 | return ERR_PTR(-EROFS); | |
250 | ||
437f88cc | 251 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
ac27a0ec DK |
252 | /* Special case here: if the journal has aborted behind our |
253 | * backs (eg. EIO in the commit thread), then we still need to | |
254 | * take the FS itself readonly cleanly. */ | |
617ba13b | 255 | journal = EXT4_SB(sb)->s_journal; |
0390131b FM |
256 | if (journal) { |
257 | if (is_journal_aborted(journal)) { | |
c67d859e | 258 | ext4_abort(sb, "Detected aborted journal"); |
0390131b FM |
259 | return ERR_PTR(-EROFS); |
260 | } | |
261 | return jbd2_journal_start(journal, nblocks); | |
ac27a0ec | 262 | } |
d3d1faf6 | 263 | return ext4_get_nojournal(); |
ac27a0ec DK |
264 | } |
265 | ||
266 | /* | |
267 | * The only special thing we need to do here is to make sure that all | |
dab291af | 268 | * jbd2_journal_stop calls result in the superblock being marked dirty, so |
ac27a0ec DK |
269 | * that sync() will call the filesystem's write_super callback if |
270 | * appropriate. | |
271 | */ | |
c398eda0 | 272 | int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) |
ac27a0ec DK |
273 | { |
274 | struct super_block *sb; | |
275 | int err; | |
276 | int rc; | |
277 | ||
0390131b | 278 | if (!ext4_handle_valid(handle)) { |
d3d1faf6 | 279 | ext4_put_nojournal(handle); |
0390131b FM |
280 | return 0; |
281 | } | |
ac27a0ec DK |
282 | sb = handle->h_transaction->t_journal->j_private; |
283 | err = handle->h_err; | |
dab291af | 284 | rc = jbd2_journal_stop(handle); |
ac27a0ec DK |
285 | |
286 | if (!err) | |
287 | err = rc; | |
288 | if (err) | |
c398eda0 | 289 | __ext4_std_error(sb, where, line, err); |
ac27a0ec DK |
290 | return err; |
291 | } | |
292 | ||
90c7201b TT |
293 | void ext4_journal_abort_handle(const char *caller, unsigned int line, |
294 | const char *err_fn, struct buffer_head *bh, | |
295 | handle_t *handle, int err) | |
ac27a0ec DK |
296 | { |
297 | char nbuf[16]; | |
617ba13b | 298 | const char *errstr = ext4_decode_error(NULL, err, nbuf); |
ac27a0ec | 299 | |
0390131b FM |
300 | BUG_ON(!ext4_handle_valid(handle)); |
301 | ||
ac27a0ec DK |
302 | if (bh) |
303 | BUFFER_TRACE(bh, "abort"); | |
304 | ||
305 | if (!handle->h_err) | |
306 | handle->h_err = err; | |
307 | ||
308 | if (is_handle_aborted(handle)) | |
309 | return; | |
310 | ||
90c7201b TT |
311 | printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", |
312 | caller, line, errstr, err_fn); | |
ac27a0ec | 313 | |
dab291af | 314 | jbd2_journal_abort_handle(handle); |
ac27a0ec DK |
315 | } |
316 | ||
1c13d5c0 TT |
317 | static void __save_error_info(struct super_block *sb, const char *func, |
318 | unsigned int line) | |
319 | { | |
320 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
321 | ||
322 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; | |
323 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
324 | es->s_last_error_time = cpu_to_le32(get_seconds()); | |
325 | strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); | |
326 | es->s_last_error_line = cpu_to_le32(line); | |
327 | if (!es->s_first_error_time) { | |
328 | es->s_first_error_time = es->s_last_error_time; | |
329 | strncpy(es->s_first_error_func, func, | |
330 | sizeof(es->s_first_error_func)); | |
331 | es->s_first_error_line = cpu_to_le32(line); | |
332 | es->s_first_error_ino = es->s_last_error_ino; | |
333 | es->s_first_error_block = es->s_last_error_block; | |
334 | } | |
66e61a9e TT |
335 | /* |
336 | * Start the daily error reporting function if it hasn't been | |
337 | * started already | |
338 | */ | |
339 | if (!es->s_error_count) | |
340 | mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); | |
1c13d5c0 TT |
341 | es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); |
342 | } | |
343 | ||
344 | static void save_error_info(struct super_block *sb, const char *func, | |
345 | unsigned int line) | |
346 | { | |
347 | __save_error_info(sb, func, line); | |
348 | ext4_commit_super(sb, 1); | |
349 | } | |
350 | ||
351 | ||
ac27a0ec DK |
352 | /* Deal with the reporting of failure conditions on a filesystem such as |
353 | * inconsistencies detected or read IO failures. | |
354 | * | |
355 | * On ext2, we can store the error state of the filesystem in the | |
617ba13b | 356 | * superblock. That is not possible on ext4, because we may have other |
ac27a0ec DK |
357 | * write ordering constraints on the superblock which prevent us from |
358 | * writing it out straight away; and given that the journal is about to | |
359 | * be aborted, we can't rely on the current, or future, transactions to | |
360 | * write out the superblock safely. | |
361 | * | |
dab291af | 362 | * We'll just use the jbd2_journal_abort() error code to record an error in |
d6b198bc | 363 | * the journal instead. On recovery, the journal will complain about |
ac27a0ec DK |
364 | * that error until we've noted it down and cleared it. |
365 | */ | |
366 | ||
617ba13b | 367 | static void ext4_handle_error(struct super_block *sb) |
ac27a0ec | 368 | { |
ac27a0ec DK |
369 | if (sb->s_flags & MS_RDONLY) |
370 | return; | |
371 | ||
2b2d6d01 | 372 | if (!test_opt(sb, ERRORS_CONT)) { |
617ba13b | 373 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 374 | |
4ab2f15b | 375 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 376 | if (journal) |
dab291af | 377 | jbd2_journal_abort(journal, -EIO); |
ac27a0ec | 378 | } |
2b2d6d01 | 379 | if (test_opt(sb, ERRORS_RO)) { |
b31e1552 | 380 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); |
ac27a0ec DK |
381 | sb->s_flags |= MS_RDONLY; |
382 | } | |
ac27a0ec | 383 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 384 | panic("EXT4-fs (device %s): panic forced after error\n", |
ac27a0ec DK |
385 | sb->s_id); |
386 | } | |
387 | ||
12062ddd | 388 | void __ext4_error(struct super_block *sb, const char *function, |
c398eda0 | 389 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
390 | { |
391 | va_list args; | |
392 | ||
393 | va_start(args, fmt); | |
c398eda0 TT |
394 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: ", |
395 | sb->s_id, function, line, current->comm); | |
ac27a0ec DK |
396 | vprintk(fmt, args); |
397 | printk("\n"); | |
398 | va_end(args); | |
399 | ||
617ba13b | 400 | ext4_handle_error(sb); |
ac27a0ec DK |
401 | } |
402 | ||
c398eda0 TT |
403 | void ext4_error_inode(struct inode *inode, const char *function, |
404 | unsigned int line, ext4_fsblk_t block, | |
273df556 FM |
405 | const char *fmt, ...) |
406 | { | |
407 | va_list args; | |
1c13d5c0 | 408 | struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; |
273df556 | 409 | |
1c13d5c0 TT |
410 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); |
411 | es->s_last_error_block = cpu_to_le64(block); | |
412 | save_error_info(inode->i_sb, function, line); | |
273df556 | 413 | va_start(args, fmt); |
c398eda0 TT |
414 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", |
415 | inode->i_sb->s_id, function, line, inode->i_ino); | |
416 | if (block) | |
417 | printk("block %llu: ", block); | |
418 | printk("comm %s: ", current->comm); | |
273df556 FM |
419 | vprintk(fmt, args); |
420 | printk("\n"); | |
421 | va_end(args); | |
422 | ||
423 | ext4_handle_error(inode->i_sb); | |
424 | } | |
425 | ||
c398eda0 TT |
426 | void ext4_error_file(struct file *file, const char *function, |
427 | unsigned int line, const char *fmt, ...) | |
273df556 FM |
428 | { |
429 | va_list args; | |
1c13d5c0 | 430 | struct ext4_super_block *es; |
273df556 FM |
431 | struct inode *inode = file->f_dentry->d_inode; |
432 | char pathname[80], *path; | |
433 | ||
1c13d5c0 TT |
434 | es = EXT4_SB(inode->i_sb)->s_es; |
435 | es->s_last_error_ino = cpu_to_le32(inode->i_ino); | |
436 | save_error_info(inode->i_sb, function, line); | |
273df556 FM |
437 | va_start(args, fmt); |
438 | path = d_path(&(file->f_path), pathname, sizeof(pathname)); | |
439 | if (!path) | |
440 | path = "(unknown)"; | |
441 | printk(KERN_CRIT | |
c398eda0 TT |
442 | "EXT4-fs error (device %s): %s:%d: inode #%lu " |
443 | "(comm %s path %s): ", | |
444 | inode->i_sb->s_id, function, line, inode->i_ino, | |
445 | current->comm, path); | |
273df556 FM |
446 | vprintk(fmt, args); |
447 | printk("\n"); | |
448 | va_end(args); | |
449 | ||
450 | ext4_handle_error(inode->i_sb); | |
451 | } | |
452 | ||
2b2d6d01 | 453 | static const char *ext4_decode_error(struct super_block *sb, int errno, |
ac27a0ec DK |
454 | char nbuf[16]) |
455 | { | |
456 | char *errstr = NULL; | |
457 | ||
458 | switch (errno) { | |
459 | case -EIO: | |
460 | errstr = "IO failure"; | |
461 | break; | |
462 | case -ENOMEM: | |
463 | errstr = "Out of memory"; | |
464 | break; | |
465 | case -EROFS: | |
78f1ddbb TT |
466 | if (!sb || (EXT4_SB(sb)->s_journal && |
467 | EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) | |
ac27a0ec DK |
468 | errstr = "Journal has aborted"; |
469 | else | |
470 | errstr = "Readonly filesystem"; | |
471 | break; | |
472 | default: | |
473 | /* If the caller passed in an extra buffer for unknown | |
474 | * errors, textualise them now. Else we just return | |
475 | * NULL. */ | |
476 | if (nbuf) { | |
477 | /* Check for truncated error codes... */ | |
478 | if (snprintf(nbuf, 16, "error %d", -errno) >= 0) | |
479 | errstr = nbuf; | |
480 | } | |
481 | break; | |
482 | } | |
483 | ||
484 | return errstr; | |
485 | } | |
486 | ||
617ba13b | 487 | /* __ext4_std_error decodes expected errors from journaling functions |
ac27a0ec DK |
488 | * automatically and invokes the appropriate error response. */ |
489 | ||
c398eda0 TT |
490 | void __ext4_std_error(struct super_block *sb, const char *function, |
491 | unsigned int line, int errno) | |
ac27a0ec DK |
492 | { |
493 | char nbuf[16]; | |
494 | const char *errstr; | |
495 | ||
496 | /* Special case: if the error is EROFS, and we're not already | |
497 | * inside a transaction, then there's really no point in logging | |
498 | * an error. */ | |
499 | if (errno == -EROFS && journal_current_handle() == NULL && | |
500 | (sb->s_flags & MS_RDONLY)) | |
501 | return; | |
502 | ||
617ba13b | 503 | errstr = ext4_decode_error(sb, errno, nbuf); |
c398eda0 TT |
504 | printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", |
505 | sb->s_id, function, line, errstr); | |
1c13d5c0 | 506 | save_error_info(sb, function, line); |
ac27a0ec | 507 | |
617ba13b | 508 | ext4_handle_error(sb); |
ac27a0ec DK |
509 | } |
510 | ||
511 | /* | |
617ba13b | 512 | * ext4_abort is a much stronger failure handler than ext4_error. The |
ac27a0ec DK |
513 | * abort function may be used to deal with unrecoverable failures such |
514 | * as journal IO errors or ENOMEM at a critical moment in log management. | |
515 | * | |
516 | * We unconditionally force the filesystem into an ABORT|READONLY state, | |
517 | * unless the error response on the fs has been set to panic in which | |
518 | * case we take the easy way out and panic immediately. | |
519 | */ | |
520 | ||
c67d859e | 521 | void __ext4_abort(struct super_block *sb, const char *function, |
c398eda0 | 522 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
523 | { |
524 | va_list args; | |
525 | ||
1c13d5c0 | 526 | save_error_info(sb, function, line); |
ac27a0ec | 527 | va_start(args, fmt); |
c398eda0 TT |
528 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, |
529 | function, line); | |
ac27a0ec DK |
530 | vprintk(fmt, args); |
531 | printk("\n"); | |
532 | va_end(args); | |
533 | ||
1c13d5c0 TT |
534 | if ((sb->s_flags & MS_RDONLY) == 0) { |
535 | ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); | |
536 | sb->s_flags |= MS_RDONLY; | |
537 | EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; | |
538 | if (EXT4_SB(sb)->s_journal) | |
539 | jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); | |
540 | save_error_info(sb, function, line); | |
541 | } | |
ac27a0ec | 542 | if (test_opt(sb, ERRORS_PANIC)) |
617ba13b | 543 | panic("EXT4-fs panic from previous error\n"); |
ac27a0ec DK |
544 | } |
545 | ||
b31e1552 ES |
546 | void ext4_msg (struct super_block * sb, const char *prefix, |
547 | const char *fmt, ...) | |
548 | { | |
549 | va_list args; | |
550 | ||
551 | va_start(args, fmt); | |
552 | printk("%sEXT4-fs (%s): ", prefix, sb->s_id); | |
553 | vprintk(fmt, args); | |
554 | printk("\n"); | |
555 | va_end(args); | |
556 | } | |
557 | ||
12062ddd | 558 | void __ext4_warning(struct super_block *sb, const char *function, |
c398eda0 | 559 | unsigned int line, const char *fmt, ...) |
ac27a0ec DK |
560 | { |
561 | va_list args; | |
562 | ||
563 | va_start(args, fmt); | |
c398eda0 TT |
564 | printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: ", |
565 | sb->s_id, function, line); | |
ac27a0ec DK |
566 | vprintk(fmt, args); |
567 | printk("\n"); | |
568 | va_end(args); | |
569 | } | |
570 | ||
e29136f8 TT |
571 | void __ext4_grp_locked_error(const char *function, unsigned int line, |
572 | struct super_block *sb, ext4_group_t grp, | |
573 | unsigned long ino, ext4_fsblk_t block, | |
574 | const char *fmt, ...) | |
5d1b1b3f AK |
575 | __releases(bitlock) |
576 | __acquires(bitlock) | |
577 | { | |
578 | va_list args; | |
579 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; | |
580 | ||
1c13d5c0 TT |
581 | es->s_last_error_ino = cpu_to_le32(ino); |
582 | es->s_last_error_block = cpu_to_le64(block); | |
583 | __save_error_info(sb, function, line); | |
5d1b1b3f | 584 | va_start(args, fmt); |
e29136f8 TT |
585 | printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u", |
586 | sb->s_id, function, line, grp); | |
587 | if (ino) | |
588 | printk("inode %lu: ", ino); | |
589 | if (block) | |
590 | printk("block %llu:", (unsigned long long) block); | |
5d1b1b3f AK |
591 | vprintk(fmt, args); |
592 | printk("\n"); | |
593 | va_end(args); | |
594 | ||
595 | if (test_opt(sb, ERRORS_CONT)) { | |
e2d67052 | 596 | ext4_commit_super(sb, 0); |
5d1b1b3f AK |
597 | return; |
598 | } | |
1c13d5c0 | 599 | |
5d1b1b3f AK |
600 | ext4_unlock_group(sb, grp); |
601 | ext4_handle_error(sb); | |
602 | /* | |
603 | * We only get here in the ERRORS_RO case; relocking the group | |
604 | * may be dangerous, but nothing bad will happen since the | |
605 | * filesystem will have already been marked read/only and the | |
606 | * journal has been aborted. We return 1 as a hint to callers | |
607 | * who might what to use the return value from | |
608 | * ext4_grp_locked_error() to distinguish beween the | |
609 | * ERRORS_CONT and ERRORS_RO case, and perhaps return more | |
610 | * aggressively from the ext4 function in question, with a | |
611 | * more appropriate error code. | |
612 | */ | |
613 | ext4_lock_group(sb, grp); | |
614 | return; | |
615 | } | |
616 | ||
617ba13b | 617 | void ext4_update_dynamic_rev(struct super_block *sb) |
ac27a0ec | 618 | { |
617ba13b | 619 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
ac27a0ec | 620 | |
617ba13b | 621 | if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) |
ac27a0ec DK |
622 | return; |
623 | ||
12062ddd | 624 | ext4_warning(sb, |
ac27a0ec DK |
625 | "updating to rev %d because of new feature flag, " |
626 | "running e2fsck is recommended", | |
617ba13b | 627 | EXT4_DYNAMIC_REV); |
ac27a0ec | 628 | |
617ba13b MC |
629 | es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); |
630 | es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); | |
631 | es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); | |
ac27a0ec DK |
632 | /* leave es->s_feature_*compat flags alone */ |
633 | /* es->s_uuid will be set by e2fsck if empty */ | |
634 | ||
635 | /* | |
636 | * The rest of the superblock fields should be zero, and if not it | |
637 | * means they are likely already in use, so leave them alone. We | |
638 | * can leave it up to e2fsck to clean up any inconsistencies there. | |
639 | */ | |
640 | } | |
641 | ||
642 | /* | |
643 | * Open the external journal device | |
644 | */ | |
b31e1552 | 645 | static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) |
ac27a0ec DK |
646 | { |
647 | struct block_device *bdev; | |
648 | char b[BDEVNAME_SIZE]; | |
649 | ||
e525fd89 | 650 | bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); |
ac27a0ec DK |
651 | if (IS_ERR(bdev)) |
652 | goto fail; | |
653 | return bdev; | |
654 | ||
655 | fail: | |
b31e1552 | 656 | ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", |
ac27a0ec DK |
657 | __bdevname(dev, b), PTR_ERR(bdev)); |
658 | return NULL; | |
659 | } | |
660 | ||
661 | /* | |
662 | * Release the journal device | |
663 | */ | |
617ba13b | 664 | static int ext4_blkdev_put(struct block_device *bdev) |
ac27a0ec | 665 | { |
e525fd89 | 666 | return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
ac27a0ec DK |
667 | } |
668 | ||
617ba13b | 669 | static int ext4_blkdev_remove(struct ext4_sb_info *sbi) |
ac27a0ec DK |
670 | { |
671 | struct block_device *bdev; | |
672 | int ret = -ENODEV; | |
673 | ||
674 | bdev = sbi->journal_bdev; | |
675 | if (bdev) { | |
617ba13b | 676 | ret = ext4_blkdev_put(bdev); |
ac27a0ec DK |
677 | sbi->journal_bdev = NULL; |
678 | } | |
679 | return ret; | |
680 | } | |
681 | ||
682 | static inline struct inode *orphan_list_entry(struct list_head *l) | |
683 | { | |
617ba13b | 684 | return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; |
ac27a0ec DK |
685 | } |
686 | ||
617ba13b | 687 | static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) |
ac27a0ec DK |
688 | { |
689 | struct list_head *l; | |
690 | ||
b31e1552 ES |
691 | ext4_msg(sb, KERN_ERR, "sb orphan head is %d", |
692 | le32_to_cpu(sbi->s_es->s_last_orphan)); | |
ac27a0ec DK |
693 | |
694 | printk(KERN_ERR "sb_info orphan list:\n"); | |
695 | list_for_each(l, &sbi->s_orphan) { | |
696 | struct inode *inode = orphan_list_entry(l); | |
697 | printk(KERN_ERR " " | |
698 | "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", | |
699 | inode->i_sb->s_id, inode->i_ino, inode, | |
700 | inode->i_mode, inode->i_nlink, | |
701 | NEXT_ORPHAN(inode)); | |
702 | } | |
703 | } | |
704 | ||
2b2d6d01 | 705 | static void ext4_put_super(struct super_block *sb) |
ac27a0ec | 706 | { |
617ba13b MC |
707 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
708 | struct ext4_super_block *es = sbi->s_es; | |
ef2cabf7 | 709 | int i, err; |
ac27a0ec | 710 | |
857ac889 | 711 | ext4_unregister_li_request(sb); |
e0ccfd95 CH |
712 | dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); |
713 | ||
4c0425ff MC |
714 | flush_workqueue(sbi->dio_unwritten_wq); |
715 | destroy_workqueue(sbi->dio_unwritten_wq); | |
716 | ||
a9e220f8 | 717 | lock_super(sb); |
8c85e125 | 718 | if (sb->s_dirt) |
ebc1ac16 | 719 | ext4_commit_super(sb, 1); |
8c85e125 | 720 | |
0390131b FM |
721 | if (sbi->s_journal) { |
722 | err = jbd2_journal_destroy(sbi->s_journal); | |
723 | sbi->s_journal = NULL; | |
724 | if (err < 0) | |
c67d859e | 725 | ext4_abort(sb, "Couldn't clean up the journal"); |
0390131b | 726 | } |
d4edac31 | 727 | |
a1c6c569 | 728 | del_timer(&sbi->s_err_report); |
d4edac31 JB |
729 | ext4_release_system_zone(sb); |
730 | ext4_mb_release(sb); | |
731 | ext4_ext_release(sb); | |
732 | ext4_xattr_put_super(sb); | |
733 | ||
ac27a0ec | 734 | if (!(sb->s_flags & MS_RDONLY)) { |
617ba13b | 735 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
ac27a0ec | 736 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
e2d67052 | 737 | ext4_commit_super(sb, 1); |
ac27a0ec | 738 | } |
240799cd | 739 | if (sbi->s_proc) { |
9f6200bb | 740 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 741 | } |
3197ebdb | 742 | kobject_del(&sbi->s_kobj); |
ac27a0ec DK |
743 | |
744 | for (i = 0; i < sbi->s_gdb_count; i++) | |
745 | brelse(sbi->s_group_desc[i]); | |
746 | kfree(sbi->s_group_desc); | |
c5ca7c76 TT |
747 | if (is_vmalloc_addr(sbi->s_flex_groups)) |
748 | vfree(sbi->s_flex_groups); | |
749 | else | |
750 | kfree(sbi->s_flex_groups); | |
ac27a0ec DK |
751 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
752 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
753 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
6bc6e63f | 754 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); |
ac27a0ec DK |
755 | brelse(sbi->s_sbh); |
756 | #ifdef CONFIG_QUOTA | |
757 | for (i = 0; i < MAXQUOTAS; i++) | |
758 | kfree(sbi->s_qf_names[i]); | |
759 | #endif | |
760 | ||
761 | /* Debugging code just in case the in-memory inode orphan list | |
762 | * isn't empty. The on-disk one can be non-empty if we've | |
763 | * detected an error and taken the fs readonly, but the | |
764 | * in-memory list had better be clean by this point. */ | |
765 | if (!list_empty(&sbi->s_orphan)) | |
766 | dump_orphan_list(sb, sbi); | |
767 | J_ASSERT(list_empty(&sbi->s_orphan)); | |
768 | ||
f98393a6 | 769 | invalidate_bdev(sb->s_bdev); |
ac27a0ec DK |
770 | if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { |
771 | /* | |
772 | * Invalidate the journal device's buffers. We don't want them | |
773 | * floating about in memory - the physical journal device may | |
774 | * hotswapped, and it breaks the `ro-after' testing code. | |
775 | */ | |
776 | sync_blockdev(sbi->journal_bdev); | |
f98393a6 | 777 | invalidate_bdev(sbi->journal_bdev); |
617ba13b | 778 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
779 | } |
780 | sb->s_fs_info = NULL; | |
3197ebdb TT |
781 | /* |
782 | * Now that we are completely done shutting down the | |
783 | * superblock, we need to actually destroy the kobject. | |
784 | */ | |
3197ebdb TT |
785 | unlock_super(sb); |
786 | kobject_put(&sbi->s_kobj); | |
787 | wait_for_completion(&sbi->s_kobj_unregister); | |
705895b6 | 788 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 789 | kfree(sbi); |
ac27a0ec DK |
790 | } |
791 | ||
e18b890b | 792 | static struct kmem_cache *ext4_inode_cachep; |
ac27a0ec DK |
793 | |
794 | /* | |
795 | * Called inside transaction, so use GFP_NOFS | |
796 | */ | |
617ba13b | 797 | static struct inode *ext4_alloc_inode(struct super_block *sb) |
ac27a0ec | 798 | { |
617ba13b | 799 | struct ext4_inode_info *ei; |
ac27a0ec | 800 | |
e6b4f8da | 801 | ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); |
ac27a0ec DK |
802 | if (!ei) |
803 | return NULL; | |
0b8e58a1 | 804 | |
ac27a0ec | 805 | ei->vfs_inode.i_version = 1; |
91246c00 | 806 | ei->vfs_inode.i_data.writeback_index = 0; |
a86c6181 | 807 | memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); |
c9de560d AT |
808 | INIT_LIST_HEAD(&ei->i_prealloc_list); |
809 | spin_lock_init(&ei->i_prealloc_lock); | |
0390131b FM |
810 | /* |
811 | * Note: We can be called before EXT4_SB(sb)->s_journal is set, | |
812 | * therefore it can be null here. Don't check it, just initialize | |
813 | * jinode. | |
814 | */ | |
678aaf48 | 815 | jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); |
d2a17637 MC |
816 | ei->i_reserved_data_blocks = 0; |
817 | ei->i_reserved_meta_blocks = 0; | |
818 | ei->i_allocated_meta_blocks = 0; | |
9d0be502 | 819 | ei->i_da_metadata_calc_len = 0; |
d2a17637 MC |
820 | ei->i_delalloc_reserved_flag = 0; |
821 | spin_lock_init(&(ei->i_block_reservation_lock)); | |
a9e7f447 DM |
822 | #ifdef CONFIG_QUOTA |
823 | ei->i_reserved_quota = 0; | |
824 | #endif | |
c7064ef1 | 825 | INIT_LIST_HEAD(&ei->i_completed_io_list); |
744692dc | 826 | spin_lock_init(&ei->i_completed_io_lock); |
8d5d02e6 | 827 | ei->cur_aio_dio = NULL; |
b436b9be JK |
828 | ei->i_sync_tid = 0; |
829 | ei->i_datasync_tid = 0; | |
f7ad6d2e | 830 | atomic_set(&ei->i_ioend_count, 0); |
0b8e58a1 | 831 | |
ac27a0ec DK |
832 | return &ei->vfs_inode; |
833 | } | |
834 | ||
7ff9c073 TT |
835 | static int ext4_drop_inode(struct inode *inode) |
836 | { | |
837 | int drop = generic_drop_inode(inode); | |
838 | ||
839 | trace_ext4_drop_inode(inode, drop); | |
840 | return drop; | |
841 | } | |
842 | ||
617ba13b | 843 | static void ext4_destroy_inode(struct inode *inode) |
ac27a0ec | 844 | { |
f7ad6d2e | 845 | ext4_ioend_wait(inode); |
9f7dd93d | 846 | if (!list_empty(&(EXT4_I(inode)->i_orphan))) { |
b31e1552 ES |
847 | ext4_msg(inode->i_sb, KERN_ERR, |
848 | "Inode %lu (%p): orphan list check failed!", | |
849 | inode->i_ino, EXT4_I(inode)); | |
9f7dd93d VA |
850 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, |
851 | EXT4_I(inode), sizeof(struct ext4_inode_info), | |
852 | true); | |
853 | dump_stack(); | |
854 | } | |
617ba13b | 855 | kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); |
ac27a0ec DK |
856 | } |
857 | ||
51cc5068 | 858 | static void init_once(void *foo) |
ac27a0ec | 859 | { |
617ba13b | 860 | struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; |
ac27a0ec | 861 | |
a35afb83 | 862 | INIT_LIST_HEAD(&ei->i_orphan); |
03010a33 | 863 | #ifdef CONFIG_EXT4_FS_XATTR |
a35afb83 | 864 | init_rwsem(&ei->xattr_sem); |
ac27a0ec | 865 | #endif |
0e855ac8 | 866 | init_rwsem(&ei->i_data_sem); |
a35afb83 | 867 | inode_init_once(&ei->vfs_inode); |
ac27a0ec DK |
868 | } |
869 | ||
870 | static int init_inodecache(void) | |
871 | { | |
617ba13b MC |
872 | ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", |
873 | sizeof(struct ext4_inode_info), | |
ac27a0ec DK |
874 | 0, (SLAB_RECLAIM_ACCOUNT| |
875 | SLAB_MEM_SPREAD), | |
20c2df83 | 876 | init_once); |
617ba13b | 877 | if (ext4_inode_cachep == NULL) |
ac27a0ec DK |
878 | return -ENOMEM; |
879 | return 0; | |
880 | } | |
881 | ||
882 | static void destroy_inodecache(void) | |
883 | { | |
617ba13b | 884 | kmem_cache_destroy(ext4_inode_cachep); |
ac27a0ec DK |
885 | } |
886 | ||
0930fcc1 | 887 | void ext4_clear_inode(struct inode *inode) |
ac27a0ec | 888 | { |
0930fcc1 AV |
889 | invalidate_inode_buffers(inode); |
890 | end_writeback(inode); | |
9f754758 | 891 | dquot_drop(inode); |
c2ea3fde | 892 | ext4_discard_preallocations(inode); |
0390131b FM |
893 | if (EXT4_JOURNAL(inode)) |
894 | jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, | |
678aaf48 | 895 | &EXT4_I(inode)->jinode); |
ac27a0ec DK |
896 | } |
897 | ||
2b2d6d01 TT |
898 | static inline void ext4_show_quota_options(struct seq_file *seq, |
899 | struct super_block *sb) | |
ac27a0ec DK |
900 | { |
901 | #if defined(CONFIG_QUOTA) | |
617ba13b | 902 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 903 | |
5a20bdfc JK |
904 | if (sbi->s_jquota_fmt) { |
905 | char *fmtname = ""; | |
906 | ||
907 | switch (sbi->s_jquota_fmt) { | |
908 | case QFMT_VFS_OLD: | |
909 | fmtname = "vfsold"; | |
910 | break; | |
911 | case QFMT_VFS_V0: | |
912 | fmtname = "vfsv0"; | |
913 | break; | |
914 | case QFMT_VFS_V1: | |
915 | fmtname = "vfsv1"; | |
916 | break; | |
917 | } | |
918 | seq_printf(seq, ",jqfmt=%s", fmtname); | |
919 | } | |
ac27a0ec DK |
920 | |
921 | if (sbi->s_qf_names[USRQUOTA]) | |
922 | seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); | |
923 | ||
924 | if (sbi->s_qf_names[GRPQUOTA]) | |
925 | seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); | |
926 | ||
482a7425 | 927 | if (test_opt(sb, USRQUOTA)) |
ac27a0ec DK |
928 | seq_puts(seq, ",usrquota"); |
929 | ||
482a7425 | 930 | if (test_opt(sb, GRPQUOTA)) |
ac27a0ec DK |
931 | seq_puts(seq, ",grpquota"); |
932 | #endif | |
933 | } | |
934 | ||
d9c9bef1 MS |
935 | /* |
936 | * Show an option if | |
937 | * - it's set to a non-default value OR | |
938 | * - if the per-sb default is different from the global default | |
939 | */ | |
617ba13b | 940 | static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) |
ac27a0ec | 941 | { |
aa22df2c AK |
942 | int def_errors; |
943 | unsigned long def_mount_opts; | |
ac27a0ec | 944 | struct super_block *sb = vfs->mnt_sb; |
d9c9bef1 MS |
945 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
946 | struct ext4_super_block *es = sbi->s_es; | |
d9c9bef1 MS |
947 | |
948 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
aa22df2c | 949 | def_errors = le16_to_cpu(es->s_errors); |
d9c9bef1 MS |
950 | |
951 | if (sbi->s_sb_block != 1) | |
952 | seq_printf(seq, ",sb=%llu", sbi->s_sb_block); | |
953 | if (test_opt(sb, MINIX_DF)) | |
954 | seq_puts(seq, ",minixdf"); | |
aa22df2c | 955 | if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) |
d9c9bef1 MS |
956 | seq_puts(seq, ",grpid"); |
957 | if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) | |
958 | seq_puts(seq, ",nogrpid"); | |
959 | if (sbi->s_resuid != EXT4_DEF_RESUID || | |
960 | le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { | |
961 | seq_printf(seq, ",resuid=%u", sbi->s_resuid); | |
962 | } | |
963 | if (sbi->s_resgid != EXT4_DEF_RESGID || | |
964 | le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { | |
965 | seq_printf(seq, ",resgid=%u", sbi->s_resgid); | |
966 | } | |
bb4f397a | 967 | if (test_opt(sb, ERRORS_RO)) { |
d9c9bef1 | 968 | if (def_errors == EXT4_ERRORS_PANIC || |
bb4f397a AK |
969 | def_errors == EXT4_ERRORS_CONTINUE) { |
970 | seq_puts(seq, ",errors=remount-ro"); | |
d9c9bef1 MS |
971 | } |
972 | } | |
aa22df2c | 973 | if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) |
bb4f397a | 974 | seq_puts(seq, ",errors=continue"); |
aa22df2c | 975 | if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) |
d9c9bef1 | 976 | seq_puts(seq, ",errors=panic"); |
aa22df2c | 977 | if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) |
d9c9bef1 | 978 | seq_puts(seq, ",nouid32"); |
aa22df2c | 979 | if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) |
d9c9bef1 MS |
980 | seq_puts(seq, ",debug"); |
981 | if (test_opt(sb, OLDALLOC)) | |
982 | seq_puts(seq, ",oldalloc"); | |
03010a33 | 983 | #ifdef CONFIG_EXT4_FS_XATTR |
aa22df2c AK |
984 | if (test_opt(sb, XATTR_USER) && |
985 | !(def_mount_opts & EXT4_DEFM_XATTR_USER)) | |
d9c9bef1 MS |
986 | seq_puts(seq, ",user_xattr"); |
987 | if (!test_opt(sb, XATTR_USER) && | |
988 | (def_mount_opts & EXT4_DEFM_XATTR_USER)) { | |
989 | seq_puts(seq, ",nouser_xattr"); | |
990 | } | |
991 | #endif | |
03010a33 | 992 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
aa22df2c | 993 | if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) |
d9c9bef1 MS |
994 | seq_puts(seq, ",acl"); |
995 | if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) | |
996 | seq_puts(seq, ",noacl"); | |
997 | #endif | |
30773840 | 998 | if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { |
d9c9bef1 MS |
999 | seq_printf(seq, ",commit=%u", |
1000 | (unsigned) (sbi->s_commit_interval / HZ)); | |
1001 | } | |
30773840 TT |
1002 | if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { |
1003 | seq_printf(seq, ",min_batch_time=%u", | |
1004 | (unsigned) sbi->s_min_batch_time); | |
1005 | } | |
1006 | if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { | |
1007 | seq_printf(seq, ",max_batch_time=%u", | |
1008 | (unsigned) sbi->s_min_batch_time); | |
1009 | } | |
1010 | ||
571640ca ES |
1011 | /* |
1012 | * We're changing the default of barrier mount option, so | |
1013 | * let's always display its mount state so it's clear what its | |
1014 | * status is. | |
1015 | */ | |
1016 | seq_puts(seq, ",barrier="); | |
1017 | seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); | |
cd0b6a39 TT |
1018 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) |
1019 | seq_puts(seq, ",journal_async_commit"); | |
39a4bade JK |
1020 | else if (test_opt(sb, JOURNAL_CHECKSUM)) |
1021 | seq_puts(seq, ",journal_checksum"); | |
25ec56b5 JNC |
1022 | if (test_opt(sb, I_VERSION)) |
1023 | seq_puts(seq, ",i_version"); | |
8b67f04a TT |
1024 | if (!test_opt(sb, DELALLOC) && |
1025 | !(def_mount_opts & EXT4_DEFM_NODELALLOC)) | |
dd919b98 AK |
1026 | seq_puts(seq, ",nodelalloc"); |
1027 | ||
cb45bbe4 MS |
1028 | if (sbi->s_stripe) |
1029 | seq_printf(seq, ",stripe=%lu", sbi->s_stripe); | |
aa22df2c AK |
1030 | /* |
1031 | * journal mode get enabled in different ways | |
1032 | * So just print the value even if we didn't specify it | |
1033 | */ | |
617ba13b | 1034 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) |
ac27a0ec | 1035 | seq_puts(seq, ",data=journal"); |
617ba13b | 1036 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) |
ac27a0ec | 1037 | seq_puts(seq, ",data=ordered"); |
617ba13b | 1038 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) |
ac27a0ec DK |
1039 | seq_puts(seq, ",data=writeback"); |
1040 | ||
240799cd TT |
1041 | if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) |
1042 | seq_printf(seq, ",inode_readahead_blks=%u", | |
1043 | sbi->s_inode_readahead_blks); | |
1044 | ||
5bf5683a HK |
1045 | if (test_opt(sb, DATA_ERR_ABORT)) |
1046 | seq_puts(seq, ",data_err=abort"); | |
1047 | ||
afd4672d | 1048 | if (test_opt(sb, NO_AUTO_DA_ALLOC)) |
06705bff | 1049 | seq_puts(seq, ",noauto_da_alloc"); |
afd4672d | 1050 | |
8b67f04a | 1051 | if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) |
5328e635 ES |
1052 | seq_puts(seq, ",discard"); |
1053 | ||
e3bb52ae ES |
1054 | if (test_opt(sb, NOLOAD)) |
1055 | seq_puts(seq, ",norecovery"); | |
1056 | ||
744692dc JZ |
1057 | if (test_opt(sb, DIOREAD_NOLOCK)) |
1058 | seq_puts(seq, ",dioread_nolock"); | |
1059 | ||
8b67f04a TT |
1060 | if (test_opt(sb, BLOCK_VALIDITY) && |
1061 | !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) | |
1062 | seq_puts(seq, ",block_validity"); | |
1063 | ||
bfff6873 LC |
1064 | if (!test_opt(sb, INIT_INODE_TABLE)) |
1065 | seq_puts(seq, ",noinit_inode_table"); | |
1066 | else if (sbi->s_li_wait_mult) | |
1067 | seq_printf(seq, ",init_inode_table=%u", | |
1068 | (unsigned) sbi->s_li_wait_mult); | |
1069 | ||
617ba13b | 1070 | ext4_show_quota_options(seq, sb); |
0b8e58a1 | 1071 | |
ac27a0ec DK |
1072 | return 0; |
1073 | } | |
1074 | ||
1b961ac0 | 1075 | static struct inode *ext4_nfs_get_inode(struct super_block *sb, |
0b8e58a1 | 1076 | u64 ino, u32 generation) |
ac27a0ec | 1077 | { |
ac27a0ec | 1078 | struct inode *inode; |
ac27a0ec | 1079 | |
617ba13b | 1080 | if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) |
ac27a0ec | 1081 | return ERR_PTR(-ESTALE); |
617ba13b | 1082 | if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) |
ac27a0ec DK |
1083 | return ERR_PTR(-ESTALE); |
1084 | ||
1085 | /* iget isn't really right if the inode is currently unallocated!! | |
1086 | * | |
617ba13b | 1087 | * ext4_read_inode will return a bad_inode if the inode had been |
ac27a0ec DK |
1088 | * deleted, so we should be safe. |
1089 | * | |
1090 | * Currently we don't know the generation for parent directory, so | |
1091 | * a generation of 0 means "accept any" | |
1092 | */ | |
1d1fe1ee DH |
1093 | inode = ext4_iget(sb, ino); |
1094 | if (IS_ERR(inode)) | |
1095 | return ERR_CAST(inode); | |
1096 | if (generation && inode->i_generation != generation) { | |
ac27a0ec DK |
1097 | iput(inode); |
1098 | return ERR_PTR(-ESTALE); | |
1099 | } | |
1b961ac0 CH |
1100 | |
1101 | return inode; | |
1102 | } | |
1103 | ||
1104 | static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1105 | int fh_len, int fh_type) |
1b961ac0 CH |
1106 | { |
1107 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, | |
1108 | ext4_nfs_get_inode); | |
1109 | } | |
1110 | ||
1111 | static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, | |
0b8e58a1 | 1112 | int fh_len, int fh_type) |
1b961ac0 CH |
1113 | { |
1114 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, | |
1115 | ext4_nfs_get_inode); | |
ac27a0ec DK |
1116 | } |
1117 | ||
c39a7f84 TO |
1118 | /* |
1119 | * Try to release metadata pages (indirect blocks, directories) which are | |
1120 | * mapped via the block device. Since these pages could have journal heads | |
1121 | * which would prevent try_to_free_buffers() from freeing them, we must use | |
1122 | * jbd2 layer's try_to_free_buffers() function to release them. | |
1123 | */ | |
0b8e58a1 AD |
1124 | static int bdev_try_to_free_page(struct super_block *sb, struct page *page, |
1125 | gfp_t wait) | |
c39a7f84 TO |
1126 | { |
1127 | journal_t *journal = EXT4_SB(sb)->s_journal; | |
1128 | ||
1129 | WARN_ON(PageChecked(page)); | |
1130 | if (!page_has_buffers(page)) | |
1131 | return 0; | |
1132 | if (journal) | |
1133 | return jbd2_journal_try_to_free_buffers(journal, page, | |
1134 | wait & ~__GFP_WAIT); | |
1135 | return try_to_free_buffers(page); | |
1136 | } | |
1137 | ||
ac27a0ec | 1138 | #ifdef CONFIG_QUOTA |
af5bc92d | 1139 | #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") |
2b2d6d01 | 1140 | #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) |
ac27a0ec | 1141 | |
617ba13b MC |
1142 | static int ext4_write_dquot(struct dquot *dquot); |
1143 | static int ext4_acquire_dquot(struct dquot *dquot); | |
1144 | static int ext4_release_dquot(struct dquot *dquot); | |
1145 | static int ext4_mark_dquot_dirty(struct dquot *dquot); | |
1146 | static int ext4_write_info(struct super_block *sb, int type); | |
6f28e087 | 1147 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 1148 | char *path); |
ca0e05e4 | 1149 | static int ext4_quota_off(struct super_block *sb, int type); |
617ba13b MC |
1150 | static int ext4_quota_on_mount(struct super_block *sb, int type); |
1151 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, | |
ac27a0ec | 1152 | size_t len, loff_t off); |
617ba13b | 1153 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
1154 | const char *data, size_t len, loff_t off); |
1155 | ||
61e225dc | 1156 | static const struct dquot_operations ext4_quota_operations = { |
a9e7f447 | 1157 | #ifdef CONFIG_QUOTA |
60e58e0f | 1158 | .get_reserved_space = ext4_get_reserved_space, |
a9e7f447 | 1159 | #endif |
617ba13b MC |
1160 | .write_dquot = ext4_write_dquot, |
1161 | .acquire_dquot = ext4_acquire_dquot, | |
1162 | .release_dquot = ext4_release_dquot, | |
1163 | .mark_dirty = ext4_mark_dquot_dirty, | |
a5b5ee32 JK |
1164 | .write_info = ext4_write_info, |
1165 | .alloc_dquot = dquot_alloc, | |
1166 | .destroy_dquot = dquot_destroy, | |
ac27a0ec DK |
1167 | }; |
1168 | ||
0d54b217 | 1169 | static const struct quotactl_ops ext4_qctl_operations = { |
617ba13b | 1170 | .quota_on = ext4_quota_on, |
ca0e05e4 | 1171 | .quota_off = ext4_quota_off, |
287a8095 CH |
1172 | .quota_sync = dquot_quota_sync, |
1173 | .get_info = dquot_get_dqinfo, | |
1174 | .set_info = dquot_set_dqinfo, | |
1175 | .get_dqblk = dquot_get_dqblk, | |
1176 | .set_dqblk = dquot_set_dqblk | |
ac27a0ec DK |
1177 | }; |
1178 | #endif | |
1179 | ||
ee9b6d61 | 1180 | static const struct super_operations ext4_sops = { |
617ba13b MC |
1181 | .alloc_inode = ext4_alloc_inode, |
1182 | .destroy_inode = ext4_destroy_inode, | |
617ba13b MC |
1183 | .write_inode = ext4_write_inode, |
1184 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1185 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1186 | .evict_inode = ext4_evict_inode, |
617ba13b | 1187 | .put_super = ext4_put_super, |
617ba13b | 1188 | .sync_fs = ext4_sync_fs, |
c4be0c1d TS |
1189 | .freeze_fs = ext4_freeze, |
1190 | .unfreeze_fs = ext4_unfreeze, | |
617ba13b MC |
1191 | .statfs = ext4_statfs, |
1192 | .remount_fs = ext4_remount, | |
617ba13b | 1193 | .show_options = ext4_show_options, |
ac27a0ec | 1194 | #ifdef CONFIG_QUOTA |
617ba13b MC |
1195 | .quota_read = ext4_quota_read, |
1196 | .quota_write = ext4_quota_write, | |
ac27a0ec | 1197 | #endif |
c39a7f84 | 1198 | .bdev_try_to_free_page = bdev_try_to_free_page, |
7360d173 | 1199 | .trim_fs = ext4_trim_fs |
ac27a0ec DK |
1200 | }; |
1201 | ||
9ca92389 TT |
1202 | static const struct super_operations ext4_nojournal_sops = { |
1203 | .alloc_inode = ext4_alloc_inode, | |
1204 | .destroy_inode = ext4_destroy_inode, | |
1205 | .write_inode = ext4_write_inode, | |
1206 | .dirty_inode = ext4_dirty_inode, | |
7ff9c073 | 1207 | .drop_inode = ext4_drop_inode, |
0930fcc1 | 1208 | .evict_inode = ext4_evict_inode, |
9ca92389 TT |
1209 | .write_super = ext4_write_super, |
1210 | .put_super = ext4_put_super, | |
1211 | .statfs = ext4_statfs, | |
1212 | .remount_fs = ext4_remount, | |
9ca92389 TT |
1213 | .show_options = ext4_show_options, |
1214 | #ifdef CONFIG_QUOTA | |
1215 | .quota_read = ext4_quota_read, | |
1216 | .quota_write = ext4_quota_write, | |
1217 | #endif | |
1218 | .bdev_try_to_free_page = bdev_try_to_free_page, | |
1219 | }; | |
1220 | ||
39655164 | 1221 | static const struct export_operations ext4_export_ops = { |
1b961ac0 CH |
1222 | .fh_to_dentry = ext4_fh_to_dentry, |
1223 | .fh_to_parent = ext4_fh_to_parent, | |
617ba13b | 1224 | .get_parent = ext4_get_parent, |
ac27a0ec DK |
1225 | }; |
1226 | ||
1227 | enum { | |
1228 | Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, | |
1229 | Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, | |
01436ef2 | 1230 | Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, |
ac27a0ec | 1231 | Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, |
06705bff | 1232 | Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, |
30773840 | 1233 | Opt_commit, Opt_min_batch_time, Opt_max_batch_time, |
c3191067 | 1234 | Opt_journal_update, Opt_journal_dev, |
818d276c | 1235 | Opt_journal_checksum, Opt_journal_async_commit, |
ac27a0ec | 1236 | Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, |
296c355c | 1237 | Opt_data_err_abort, Opt_data_err_ignore, |
ac27a0ec | 1238 | Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, |
5a20bdfc JK |
1239 | Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, |
1240 | Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, | |
1241 | Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, | |
01436ef2 | 1242 | Opt_stripe, Opt_delalloc, Opt_nodelalloc, |
6fd058f7 | 1243 | Opt_block_validity, Opt_noblock_validity, |
5328e635 | 1244 | Opt_inode_readahead_blks, Opt_journal_ioprio, |
744692dc | 1245 | Opt_dioread_nolock, Opt_dioread_lock, |
5328e635 | 1246 | Opt_discard, Opt_nodiscard, |
bfff6873 | 1247 | Opt_init_inode_table, Opt_noinit_inode_table, |
ac27a0ec DK |
1248 | }; |
1249 | ||
a447c093 | 1250 | static const match_table_t tokens = { |
ac27a0ec DK |
1251 | {Opt_bsd_df, "bsddf"}, |
1252 | {Opt_minix_df, "minixdf"}, | |
1253 | {Opt_grpid, "grpid"}, | |
1254 | {Opt_grpid, "bsdgroups"}, | |
1255 | {Opt_nogrpid, "nogrpid"}, | |
1256 | {Opt_nogrpid, "sysvgroups"}, | |
1257 | {Opt_resgid, "resgid=%u"}, | |
1258 | {Opt_resuid, "resuid=%u"}, | |
1259 | {Opt_sb, "sb=%u"}, | |
1260 | {Opt_err_cont, "errors=continue"}, | |
1261 | {Opt_err_panic, "errors=panic"}, | |
1262 | {Opt_err_ro, "errors=remount-ro"}, | |
1263 | {Opt_nouid32, "nouid32"}, | |
ac27a0ec DK |
1264 | {Opt_debug, "debug"}, |
1265 | {Opt_oldalloc, "oldalloc"}, | |
1266 | {Opt_orlov, "orlov"}, | |
1267 | {Opt_user_xattr, "user_xattr"}, | |
1268 | {Opt_nouser_xattr, "nouser_xattr"}, | |
1269 | {Opt_acl, "acl"}, | |
1270 | {Opt_noacl, "noacl"}, | |
ac27a0ec | 1271 | {Opt_noload, "noload"}, |
e3bb52ae | 1272 | {Opt_noload, "norecovery"}, |
ac27a0ec DK |
1273 | {Opt_nobh, "nobh"}, |
1274 | {Opt_bh, "bh"}, | |
1275 | {Opt_commit, "commit=%u"}, | |
30773840 TT |
1276 | {Opt_min_batch_time, "min_batch_time=%u"}, |
1277 | {Opt_max_batch_time, "max_batch_time=%u"}, | |
ac27a0ec | 1278 | {Opt_journal_update, "journal=update"}, |
ac27a0ec | 1279 | {Opt_journal_dev, "journal_dev=%u"}, |
818d276c GS |
1280 | {Opt_journal_checksum, "journal_checksum"}, |
1281 | {Opt_journal_async_commit, "journal_async_commit"}, | |
ac27a0ec DK |
1282 | {Opt_abort, "abort"}, |
1283 | {Opt_data_journal, "data=journal"}, | |
1284 | {Opt_data_ordered, "data=ordered"}, | |
1285 | {Opt_data_writeback, "data=writeback"}, | |
5bf5683a HK |
1286 | {Opt_data_err_abort, "data_err=abort"}, |
1287 | {Opt_data_err_ignore, "data_err=ignore"}, | |
ac27a0ec DK |
1288 | {Opt_offusrjquota, "usrjquota="}, |
1289 | {Opt_usrjquota, "usrjquota=%s"}, | |
1290 | {Opt_offgrpjquota, "grpjquota="}, | |
1291 | {Opt_grpjquota, "grpjquota=%s"}, | |
1292 | {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, | |
1293 | {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, | |
5a20bdfc | 1294 | {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, |
ac27a0ec DK |
1295 | {Opt_grpquota, "grpquota"}, |
1296 | {Opt_noquota, "noquota"}, | |
1297 | {Opt_quota, "quota"}, | |
1298 | {Opt_usrquota, "usrquota"}, | |
1299 | {Opt_barrier, "barrier=%u"}, | |
06705bff TT |
1300 | {Opt_barrier, "barrier"}, |
1301 | {Opt_nobarrier, "nobarrier"}, | |
25ec56b5 | 1302 | {Opt_i_version, "i_version"}, |
c9de560d | 1303 | {Opt_stripe, "stripe=%u"}, |
ac27a0ec | 1304 | {Opt_resize, "resize"}, |
64769240 | 1305 | {Opt_delalloc, "delalloc"}, |
dd919b98 | 1306 | {Opt_nodelalloc, "nodelalloc"}, |
6fd058f7 TT |
1307 | {Opt_block_validity, "block_validity"}, |
1308 | {Opt_noblock_validity, "noblock_validity"}, | |
240799cd | 1309 | {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, |
b3881f74 | 1310 | {Opt_journal_ioprio, "journal_ioprio=%u"}, |
afd4672d | 1311 | {Opt_auto_da_alloc, "auto_da_alloc=%u"}, |
06705bff TT |
1312 | {Opt_auto_da_alloc, "auto_da_alloc"}, |
1313 | {Opt_noauto_da_alloc, "noauto_da_alloc"}, | |
744692dc JZ |
1314 | {Opt_dioread_nolock, "dioread_nolock"}, |
1315 | {Opt_dioread_lock, "dioread_lock"}, | |
5328e635 ES |
1316 | {Opt_discard, "discard"}, |
1317 | {Opt_nodiscard, "nodiscard"}, | |
bfff6873 LC |
1318 | {Opt_init_inode_table, "init_itable=%u"}, |
1319 | {Opt_init_inode_table, "init_itable"}, | |
1320 | {Opt_noinit_inode_table, "noinit_itable"}, | |
f3f12faa | 1321 | {Opt_err, NULL}, |
ac27a0ec DK |
1322 | }; |
1323 | ||
617ba13b | 1324 | static ext4_fsblk_t get_sb_block(void **data) |
ac27a0ec | 1325 | { |
617ba13b | 1326 | ext4_fsblk_t sb_block; |
ac27a0ec DK |
1327 | char *options = (char *) *data; |
1328 | ||
1329 | if (!options || strncmp(options, "sb=", 3) != 0) | |
1330 | return 1; /* Default location */ | |
0b8e58a1 | 1331 | |
ac27a0ec | 1332 | options += 3; |
0b8e58a1 | 1333 | /* TODO: use simple_strtoll with >32bit ext4 */ |
ac27a0ec DK |
1334 | sb_block = simple_strtoul(options, &options, 0); |
1335 | if (*options && *options != ',') { | |
4776004f | 1336 | printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", |
ac27a0ec DK |
1337 | (char *) *data); |
1338 | return 1; | |
1339 | } | |
1340 | if (*options == ',') | |
1341 | options++; | |
1342 | *data = (void *) options; | |
0b8e58a1 | 1343 | |
ac27a0ec DK |
1344 | return sb_block; |
1345 | } | |
1346 | ||
b3881f74 | 1347 | #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) |
437ca0fd DM |
1348 | static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" |
1349 | "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; | |
b3881f74 | 1350 | |
56c50f11 DM |
1351 | #ifdef CONFIG_QUOTA |
1352 | static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) | |
1353 | { | |
1354 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1355 | char *qname; | |
1356 | ||
1357 | if (sb_any_quota_loaded(sb) && | |
1358 | !sbi->s_qf_names[qtype]) { | |
1359 | ext4_msg(sb, KERN_ERR, | |
1360 | "Cannot change journaled " | |
1361 | "quota options when quota turned on"); | |
1362 | return 0; | |
1363 | } | |
1364 | qname = match_strdup(args); | |
1365 | if (!qname) { | |
1366 | ext4_msg(sb, KERN_ERR, | |
1367 | "Not enough memory for storing quotafile name"); | |
1368 | return 0; | |
1369 | } | |
1370 | if (sbi->s_qf_names[qtype] && | |
1371 | strcmp(sbi->s_qf_names[qtype], qname)) { | |
1372 | ext4_msg(sb, KERN_ERR, | |
1373 | "%s quota file already specified", QTYPE2NAME(qtype)); | |
1374 | kfree(qname); | |
1375 | return 0; | |
1376 | } | |
1377 | sbi->s_qf_names[qtype] = qname; | |
1378 | if (strchr(sbi->s_qf_names[qtype], '/')) { | |
1379 | ext4_msg(sb, KERN_ERR, | |
1380 | "quotafile must be on filesystem root"); | |
1381 | kfree(sbi->s_qf_names[qtype]); | |
1382 | sbi->s_qf_names[qtype] = NULL; | |
1383 | return 0; | |
1384 | } | |
1385 | set_opt(sbi->s_mount_opt, QUOTA); | |
1386 | return 1; | |
1387 | } | |
1388 | ||
1389 | static int clear_qf_name(struct super_block *sb, int qtype) | |
1390 | { | |
1391 | ||
1392 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1393 | ||
1394 | if (sb_any_quota_loaded(sb) && | |
1395 | sbi->s_qf_names[qtype]) { | |
1396 | ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" | |
1397 | " when quota turned on"); | |
1398 | return 0; | |
1399 | } | |
1400 | /* | |
1401 | * The space will be released later when all options are confirmed | |
1402 | * to be correct | |
1403 | */ | |
1404 | sbi->s_qf_names[qtype] = NULL; | |
1405 | return 1; | |
1406 | } | |
1407 | #endif | |
1408 | ||
2b2d6d01 | 1409 | static int parse_options(char *options, struct super_block *sb, |
c3191067 | 1410 | unsigned long *journal_devnum, |
b3881f74 | 1411 | unsigned int *journal_ioprio, |
2b2d6d01 | 1412 | ext4_fsblk_t *n_blocks_count, int is_remount) |
ac27a0ec | 1413 | { |
617ba13b | 1414 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2b2d6d01 | 1415 | char *p; |
ac27a0ec DK |
1416 | substring_t args[MAX_OPT_ARGS]; |
1417 | int data_opt = 0; | |
1418 | int option; | |
1419 | #ifdef CONFIG_QUOTA | |
56c50f11 | 1420 | int qfmt; |
ac27a0ec DK |
1421 | #endif |
1422 | ||
1423 | if (!options) | |
1424 | return 1; | |
1425 | ||
2b2d6d01 | 1426 | while ((p = strsep(&options, ",")) != NULL) { |
ac27a0ec DK |
1427 | int token; |
1428 | if (!*p) | |
1429 | continue; | |
1430 | ||
15121c18 ES |
1431 | /* |
1432 | * Initialize args struct so we know whether arg was | |
1433 | * found; some options take optional arguments. | |
1434 | */ | |
1435 | args[0].to = args[0].from = 0; | |
ac27a0ec DK |
1436 | token = match_token(p, tokens, args); |
1437 | switch (token) { | |
1438 | case Opt_bsd_df: | |
437ca0fd | 1439 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1440 | clear_opt(sbi->s_mount_opt, MINIX_DF); |
ac27a0ec DK |
1441 | break; |
1442 | case Opt_minix_df: | |
437ca0fd | 1443 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1444 | set_opt(sbi->s_mount_opt, MINIX_DF); |
437ca0fd | 1445 | |
ac27a0ec DK |
1446 | break; |
1447 | case Opt_grpid: | |
437ca0fd | 1448 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1449 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1450 | |
ac27a0ec DK |
1451 | break; |
1452 | case Opt_nogrpid: | |
437ca0fd | 1453 | ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); |
2b2d6d01 | 1454 | clear_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 1455 | |
ac27a0ec DK |
1456 | break; |
1457 | case Opt_resuid: | |
1458 | if (match_int(&args[0], &option)) | |
1459 | return 0; | |
1460 | sbi->s_resuid = option; | |
1461 | break; | |
1462 | case Opt_resgid: | |
1463 | if (match_int(&args[0], &option)) | |
1464 | return 0; | |
1465 | sbi->s_resgid = option; | |
1466 | break; | |
1467 | case Opt_sb: | |
1468 | /* handled by get_sb_block() instead of here */ | |
1469 | /* *sb_block = match_int(&args[0]); */ | |
1470 | break; | |
1471 | case Opt_err_panic: | |
2b2d6d01 TT |
1472 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1473 | clear_opt(sbi->s_mount_opt, ERRORS_RO); | |
1474 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
ac27a0ec DK |
1475 | break; |
1476 | case Opt_err_ro: | |
2b2d6d01 TT |
1477 | clear_opt(sbi->s_mount_opt, ERRORS_CONT); |
1478 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1479 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
ac27a0ec DK |
1480 | break; |
1481 | case Opt_err_cont: | |
2b2d6d01 TT |
1482 | clear_opt(sbi->s_mount_opt, ERRORS_RO); |
1483 | clear_opt(sbi->s_mount_opt, ERRORS_PANIC); | |
1484 | set_opt(sbi->s_mount_opt, ERRORS_CONT); | |
ac27a0ec DK |
1485 | break; |
1486 | case Opt_nouid32: | |
2b2d6d01 | 1487 | set_opt(sbi->s_mount_opt, NO_UID32); |
ac27a0ec | 1488 | break; |
ac27a0ec | 1489 | case Opt_debug: |
2b2d6d01 | 1490 | set_opt(sbi->s_mount_opt, DEBUG); |
ac27a0ec DK |
1491 | break; |
1492 | case Opt_oldalloc: | |
2b2d6d01 | 1493 | set_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec DK |
1494 | break; |
1495 | case Opt_orlov: | |
2b2d6d01 | 1496 | clear_opt(sbi->s_mount_opt, OLDALLOC); |
ac27a0ec | 1497 | break; |
03010a33 | 1498 | #ifdef CONFIG_EXT4_FS_XATTR |
ac27a0ec | 1499 | case Opt_user_xattr: |
2b2d6d01 | 1500 | set_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1501 | break; |
1502 | case Opt_nouser_xattr: | |
2b2d6d01 | 1503 | clear_opt(sbi->s_mount_opt, XATTR_USER); |
ac27a0ec DK |
1504 | break; |
1505 | #else | |
1506 | case Opt_user_xattr: | |
1507 | case Opt_nouser_xattr: | |
b31e1552 | 1508 | ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); |
ac27a0ec DK |
1509 | break; |
1510 | #endif | |
03010a33 | 1511 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
ac27a0ec DK |
1512 | case Opt_acl: |
1513 | set_opt(sbi->s_mount_opt, POSIX_ACL); | |
1514 | break; | |
1515 | case Opt_noacl: | |
1516 | clear_opt(sbi->s_mount_opt, POSIX_ACL); | |
1517 | break; | |
1518 | #else | |
1519 | case Opt_acl: | |
1520 | case Opt_noacl: | |
b31e1552 | 1521 | ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); |
ac27a0ec DK |
1522 | break; |
1523 | #endif | |
ac27a0ec DK |
1524 | case Opt_journal_update: |
1525 | /* @@@ FIXME */ | |
1526 | /* Eventually we will want to be able to create | |
1527 | a journal file here. For now, only allow the | |
1528 | user to specify an existing inode to be the | |
1529 | journal file. */ | |
1530 | if (is_remount) { | |
b31e1552 ES |
1531 | ext4_msg(sb, KERN_ERR, |
1532 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1533 | return 0; |
1534 | } | |
2b2d6d01 | 1535 | set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); |
ac27a0ec | 1536 | break; |
ac27a0ec DK |
1537 | case Opt_journal_dev: |
1538 | if (is_remount) { | |
b31e1552 ES |
1539 | ext4_msg(sb, KERN_ERR, |
1540 | "Cannot specify journal on remount"); | |
ac27a0ec DK |
1541 | return 0; |
1542 | } | |
1543 | if (match_int(&args[0], &option)) | |
1544 | return 0; | |
1545 | *journal_devnum = option; | |
1546 | break; | |
818d276c | 1547 | case Opt_journal_checksum: |
d4da6c9c LT |
1548 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
1549 | break; | |
818d276c GS |
1550 | case Opt_journal_async_commit: |
1551 | set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); | |
d4da6c9c | 1552 | set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); |
818d276c | 1553 | break; |
ac27a0ec | 1554 | case Opt_noload: |
2b2d6d01 | 1555 | set_opt(sbi->s_mount_opt, NOLOAD); |
ac27a0ec DK |
1556 | break; |
1557 | case Opt_commit: | |
1558 | if (match_int(&args[0], &option)) | |
1559 | return 0; | |
1560 | if (option < 0) | |
1561 | return 0; | |
1562 | if (option == 0) | |
cd02ff0b | 1563 | option = JBD2_DEFAULT_MAX_COMMIT_AGE; |
ac27a0ec DK |
1564 | sbi->s_commit_interval = HZ * option; |
1565 | break; | |
30773840 TT |
1566 | case Opt_max_batch_time: |
1567 | if (match_int(&args[0], &option)) | |
1568 | return 0; | |
1569 | if (option < 0) | |
1570 | return 0; | |
1571 | if (option == 0) | |
1572 | option = EXT4_DEF_MAX_BATCH_TIME; | |
1573 | sbi->s_max_batch_time = option; | |
1574 | break; | |
1575 | case Opt_min_batch_time: | |
1576 | if (match_int(&args[0], &option)) | |
1577 | return 0; | |
1578 | if (option < 0) | |
1579 | return 0; | |
1580 | sbi->s_min_batch_time = option; | |
1581 | break; | |
ac27a0ec | 1582 | case Opt_data_journal: |
617ba13b | 1583 | data_opt = EXT4_MOUNT_JOURNAL_DATA; |
ac27a0ec DK |
1584 | goto datacheck; |
1585 | case Opt_data_ordered: | |
617ba13b | 1586 | data_opt = EXT4_MOUNT_ORDERED_DATA; |
ac27a0ec DK |
1587 | goto datacheck; |
1588 | case Opt_data_writeback: | |
617ba13b | 1589 | data_opt = EXT4_MOUNT_WRITEBACK_DATA; |
ac27a0ec DK |
1590 | datacheck: |
1591 | if (is_remount) { | |
482a7425 | 1592 | if (test_opt(sb, DATA_FLAGS) != data_opt) { |
b31e1552 ES |
1593 | ext4_msg(sb, KERN_ERR, |
1594 | "Cannot change data mode on remount"); | |
ac27a0ec DK |
1595 | return 0; |
1596 | } | |
1597 | } else { | |
482a7425 | 1598 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
ac27a0ec DK |
1599 | sbi->s_mount_opt |= data_opt; |
1600 | } | |
1601 | break; | |
5bf5683a HK |
1602 | case Opt_data_err_abort: |
1603 | set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1604 | break; | |
1605 | case Opt_data_err_ignore: | |
1606 | clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); | |
1607 | break; | |
ac27a0ec DK |
1608 | #ifdef CONFIG_QUOTA |
1609 | case Opt_usrjquota: | |
56c50f11 | 1610 | if (!set_qf_name(sb, USRQUOTA, &args[0])) |
ac27a0ec | 1611 | return 0; |
56c50f11 DM |
1612 | break; |
1613 | case Opt_grpjquota: | |
1614 | if (!set_qf_name(sb, GRPQUOTA, &args[0])) | |
ac27a0ec | 1615 | return 0; |
ac27a0ec DK |
1616 | break; |
1617 | case Opt_offusrjquota: | |
56c50f11 DM |
1618 | if (!clear_qf_name(sb, USRQUOTA)) |
1619 | return 0; | |
1620 | break; | |
ac27a0ec | 1621 | case Opt_offgrpjquota: |
56c50f11 | 1622 | if (!clear_qf_name(sb, GRPQUOTA)) |
ac27a0ec | 1623 | return 0; |
ac27a0ec | 1624 | break; |
56c50f11 | 1625 | |
ac27a0ec | 1626 | case Opt_jqfmt_vfsold: |
dfc5d03f JK |
1627 | qfmt = QFMT_VFS_OLD; |
1628 | goto set_qf_format; | |
ac27a0ec | 1629 | case Opt_jqfmt_vfsv0: |
dfc5d03f | 1630 | qfmt = QFMT_VFS_V0; |
5a20bdfc JK |
1631 | goto set_qf_format; |
1632 | case Opt_jqfmt_vfsv1: | |
1633 | qfmt = QFMT_VFS_V1; | |
dfc5d03f | 1634 | set_qf_format: |
17bd13b3 | 1635 | if (sb_any_quota_loaded(sb) && |
dfc5d03f | 1636 | sbi->s_jquota_fmt != qfmt) { |
b31e1552 | 1637 | ext4_msg(sb, KERN_ERR, "Cannot change " |
dfc5d03f | 1638 | "journaled quota options when " |
b31e1552 | 1639 | "quota turned on"); |
dfc5d03f JK |
1640 | return 0; |
1641 | } | |
1642 | sbi->s_jquota_fmt = qfmt; | |
ac27a0ec DK |
1643 | break; |
1644 | case Opt_quota: | |
1645 | case Opt_usrquota: | |
1646 | set_opt(sbi->s_mount_opt, QUOTA); | |
1647 | set_opt(sbi->s_mount_opt, USRQUOTA); | |
1648 | break; | |
1649 | case Opt_grpquota: | |
1650 | set_opt(sbi->s_mount_opt, QUOTA); | |
1651 | set_opt(sbi->s_mount_opt, GRPQUOTA); | |
1652 | break; | |
1653 | case Opt_noquota: | |
17bd13b3 | 1654 | if (sb_any_quota_loaded(sb)) { |
b31e1552 ES |
1655 | ext4_msg(sb, KERN_ERR, "Cannot change quota " |
1656 | "options when quota turned on"); | |
ac27a0ec DK |
1657 | return 0; |
1658 | } | |
1659 | clear_opt(sbi->s_mount_opt, QUOTA); | |
1660 | clear_opt(sbi->s_mount_opt, USRQUOTA); | |
1661 | clear_opt(sbi->s_mount_opt, GRPQUOTA); | |
1662 | break; | |
1663 | #else | |
1664 | case Opt_quota: | |
1665 | case Opt_usrquota: | |
1666 | case Opt_grpquota: | |
b31e1552 ES |
1667 | ext4_msg(sb, KERN_ERR, |
1668 | "quota options not supported"); | |
cd59e7b9 | 1669 | break; |
ac27a0ec DK |
1670 | case Opt_usrjquota: |
1671 | case Opt_grpjquota: | |
1672 | case Opt_offusrjquota: | |
1673 | case Opt_offgrpjquota: | |
1674 | case Opt_jqfmt_vfsold: | |
1675 | case Opt_jqfmt_vfsv0: | |
5a20bdfc | 1676 | case Opt_jqfmt_vfsv1: |
b31e1552 ES |
1677 | ext4_msg(sb, KERN_ERR, |
1678 | "journaled quota options not supported"); | |
ac27a0ec DK |
1679 | break; |
1680 | case Opt_noquota: | |
1681 | break; | |
1682 | #endif | |
1683 | case Opt_abort: | |
4ab2f15b | 1684 | sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; |
ac27a0ec | 1685 | break; |
06705bff TT |
1686 | case Opt_nobarrier: |
1687 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1688 | break; | |
ac27a0ec | 1689 | case Opt_barrier: |
15121c18 ES |
1690 | if (args[0].from) { |
1691 | if (match_int(&args[0], &option)) | |
1692 | return 0; | |
1693 | } else | |
1694 | option = 1; /* No argument, default to 1 */ | |
ac27a0ec DK |
1695 | if (option) |
1696 | set_opt(sbi->s_mount_opt, BARRIER); | |
1697 | else | |
1698 | clear_opt(sbi->s_mount_opt, BARRIER); | |
1699 | break; | |
1700 | case Opt_ignore: | |
1701 | break; | |
1702 | case Opt_resize: | |
1703 | if (!is_remount) { | |
b31e1552 ES |
1704 | ext4_msg(sb, KERN_ERR, |
1705 | "resize option only available " | |
1706 | "for remount"); | |
ac27a0ec DK |
1707 | return 0; |
1708 | } | |
1709 | if (match_int(&args[0], &option) != 0) | |
1710 | return 0; | |
1711 | *n_blocks_count = option; | |
1712 | break; | |
1713 | case Opt_nobh: | |
206f7ab4 CH |
1714 | ext4_msg(sb, KERN_WARNING, |
1715 | "Ignoring deprecated nobh option"); | |
ac27a0ec DK |
1716 | break; |
1717 | case Opt_bh: | |
206f7ab4 CH |
1718 | ext4_msg(sb, KERN_WARNING, |
1719 | "Ignoring deprecated bh option"); | |
ac27a0ec | 1720 | break; |
25ec56b5 JNC |
1721 | case Opt_i_version: |
1722 | set_opt(sbi->s_mount_opt, I_VERSION); | |
1723 | sb->s_flags |= MS_I_VERSION; | |
1724 | break; | |
dd919b98 AK |
1725 | case Opt_nodelalloc: |
1726 | clear_opt(sbi->s_mount_opt, DELALLOC); | |
1727 | break; | |
c9de560d AT |
1728 | case Opt_stripe: |
1729 | if (match_int(&args[0], &option)) | |
1730 | return 0; | |
1731 | if (option < 0) | |
1732 | return 0; | |
1733 | sbi->s_stripe = option; | |
1734 | break; | |
64769240 AT |
1735 | case Opt_delalloc: |
1736 | set_opt(sbi->s_mount_opt, DELALLOC); | |
1737 | break; | |
6fd058f7 TT |
1738 | case Opt_block_validity: |
1739 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1740 | break; | |
1741 | case Opt_noblock_validity: | |
1742 | clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
1743 | break; | |
240799cd TT |
1744 | case Opt_inode_readahead_blks: |
1745 | if (match_int(&args[0], &option)) | |
1746 | return 0; | |
1747 | if (option < 0 || option > (1 << 30)) | |
1748 | return 0; | |
f7c43950 | 1749 | if (!is_power_of_2(option)) { |
b31e1552 ES |
1750 | ext4_msg(sb, KERN_ERR, |
1751 | "EXT4-fs: inode_readahead_blks" | |
1752 | " must be a power of 2"); | |
3197ebdb TT |
1753 | return 0; |
1754 | } | |
240799cd TT |
1755 | sbi->s_inode_readahead_blks = option; |
1756 | break; | |
b3881f74 TT |
1757 | case Opt_journal_ioprio: |
1758 | if (match_int(&args[0], &option)) | |
1759 | return 0; | |
1760 | if (option < 0 || option > 7) | |
1761 | break; | |
1762 | *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, | |
1763 | option); | |
1764 | break; | |
06705bff TT |
1765 | case Opt_noauto_da_alloc: |
1766 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1767 | break; | |
afd4672d | 1768 | case Opt_auto_da_alloc: |
15121c18 ES |
1769 | if (args[0].from) { |
1770 | if (match_int(&args[0], &option)) | |
1771 | return 0; | |
1772 | } else | |
1773 | option = 1; /* No argument, default to 1 */ | |
afd4672d TT |
1774 | if (option) |
1775 | clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); | |
1776 | else | |
1777 | set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); | |
1778 | break; | |
5328e635 ES |
1779 | case Opt_discard: |
1780 | set_opt(sbi->s_mount_opt, DISCARD); | |
1781 | break; | |
1782 | case Opt_nodiscard: | |
1783 | clear_opt(sbi->s_mount_opt, DISCARD); | |
1784 | break; | |
744692dc JZ |
1785 | case Opt_dioread_nolock: |
1786 | set_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1787 | break; | |
1788 | case Opt_dioread_lock: | |
1789 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
1790 | break; | |
bfff6873 LC |
1791 | case Opt_init_inode_table: |
1792 | set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); | |
1793 | if (args[0].from) { | |
1794 | if (match_int(&args[0], &option)) | |
1795 | return 0; | |
1796 | } else | |
1797 | option = EXT4_DEF_LI_WAIT_MULT; | |
1798 | if (option < 0) | |
1799 | return 0; | |
1800 | sbi->s_li_wait_mult = option; | |
1801 | break; | |
1802 | case Opt_noinit_inode_table: | |
1803 | clear_opt(sbi->s_mount_opt, INIT_INODE_TABLE); | |
1804 | break; | |
ac27a0ec | 1805 | default: |
b31e1552 ES |
1806 | ext4_msg(sb, KERN_ERR, |
1807 | "Unrecognized mount option \"%s\" " | |
1808 | "or missing value", p); | |
ac27a0ec DK |
1809 | return 0; |
1810 | } | |
1811 | } | |
1812 | #ifdef CONFIG_QUOTA | |
1813 | if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { | |
482a7425 | 1814 | if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) |
ac27a0ec DK |
1815 | clear_opt(sbi->s_mount_opt, USRQUOTA); |
1816 | ||
482a7425 | 1817 | if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) |
ac27a0ec DK |
1818 | clear_opt(sbi->s_mount_opt, GRPQUOTA); |
1819 | ||
56c50f11 | 1820 | if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { |
b31e1552 ES |
1821 | ext4_msg(sb, KERN_ERR, "old and new quota " |
1822 | "format mixing"); | |
ac27a0ec DK |
1823 | return 0; |
1824 | } | |
1825 | ||
1826 | if (!sbi->s_jquota_fmt) { | |
b31e1552 ES |
1827 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
1828 | "not specified"); | |
ac27a0ec DK |
1829 | return 0; |
1830 | } | |
1831 | } else { | |
1832 | if (sbi->s_jquota_fmt) { | |
b31e1552 | 1833 | ext4_msg(sb, KERN_ERR, "journaled quota format " |
2c8be6b2 | 1834 | "specified with no journaling " |
b31e1552 | 1835 | "enabled"); |
ac27a0ec DK |
1836 | return 0; |
1837 | } | |
1838 | } | |
1839 | #endif | |
1840 | return 1; | |
1841 | } | |
1842 | ||
617ba13b | 1843 | static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, |
ac27a0ec DK |
1844 | int read_only) |
1845 | { | |
617ba13b | 1846 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec DK |
1847 | int res = 0; |
1848 | ||
617ba13b | 1849 | if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { |
b31e1552 ES |
1850 | ext4_msg(sb, KERN_ERR, "revision level too high, " |
1851 | "forcing read-only mode"); | |
ac27a0ec DK |
1852 | res = MS_RDONLY; |
1853 | } | |
1854 | if (read_only) | |
1855 | return res; | |
617ba13b | 1856 | if (!(sbi->s_mount_state & EXT4_VALID_FS)) |
b31e1552 ES |
1857 | ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " |
1858 | "running e2fsck is recommended"); | |
617ba13b | 1859 | else if ((sbi->s_mount_state & EXT4_ERROR_FS)) |
b31e1552 ES |
1860 | ext4_msg(sb, KERN_WARNING, |
1861 | "warning: mounting fs with errors, " | |
1862 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1863 | else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && |
1864 | le16_to_cpu(es->s_mnt_count) >= | |
1865 | (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) | |
b31e1552 ES |
1866 | ext4_msg(sb, KERN_WARNING, |
1867 | "warning: maximal mount count reached, " | |
1868 | "running e2fsck is recommended"); | |
ac27a0ec DK |
1869 | else if (le32_to_cpu(es->s_checkinterval) && |
1870 | (le32_to_cpu(es->s_lastcheck) + | |
1871 | le32_to_cpu(es->s_checkinterval) <= get_seconds())) | |
b31e1552 ES |
1872 | ext4_msg(sb, KERN_WARNING, |
1873 | "warning: checktime reached, " | |
1874 | "running e2fsck is recommended"); | |
0b8e58a1 | 1875 | if (!sbi->s_journal) |
0390131b | 1876 | es->s_state &= cpu_to_le16(~EXT4_VALID_FS); |
ac27a0ec | 1877 | if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) |
617ba13b | 1878 | es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); |
e8546d06 | 1879 | le16_add_cpu(&es->s_mnt_count, 1); |
ac27a0ec | 1880 | es->s_mtime = cpu_to_le32(get_seconds()); |
617ba13b | 1881 | ext4_update_dynamic_rev(sb); |
0390131b FM |
1882 | if (sbi->s_journal) |
1883 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
ac27a0ec | 1884 | |
e2d67052 | 1885 | ext4_commit_super(sb, 1); |
ac27a0ec | 1886 | if (test_opt(sb, DEBUG)) |
a9df9a49 | 1887 | printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " |
7f4520cc | 1888 | "bpg=%lu, ipg=%lu, mo=%04x]\n", |
ac27a0ec DK |
1889 | sb->s_blocksize, |
1890 | sbi->s_groups_count, | |
617ba13b MC |
1891 | EXT4_BLOCKS_PER_GROUP(sb), |
1892 | EXT4_INODES_PER_GROUP(sb), | |
ac27a0ec DK |
1893 | sbi->s_mount_opt); |
1894 | ||
ac27a0ec DK |
1895 | return res; |
1896 | } | |
1897 | ||
772cb7c8 JS |
1898 | static int ext4_fill_flex_info(struct super_block *sb) |
1899 | { | |
1900 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
1901 | struct ext4_group_desc *gdp = NULL; | |
772cb7c8 JS |
1902 | ext4_group_t flex_group_count; |
1903 | ext4_group_t flex_group; | |
1904 | int groups_per_flex = 0; | |
c5ca7c76 | 1905 | size_t size; |
772cb7c8 JS |
1906 | int i; |
1907 | ||
503358ae TT |
1908 | sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; |
1909 | groups_per_flex = 1 << sbi->s_log_groups_per_flex; | |
1910 | ||
1911 | if (groups_per_flex < 2) { | |
772cb7c8 JS |
1912 | sbi->s_log_groups_per_flex = 0; |
1913 | return 1; | |
1914 | } | |
1915 | ||
c62a11fd FB |
1916 | /* We allocate both existing and potentially added groups */ |
1917 | flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + | |
d94e99a6 AK |
1918 | ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << |
1919 | EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; | |
c5ca7c76 TT |
1920 | size = flex_group_count * sizeof(struct flex_groups); |
1921 | sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); | |
1922 | if (sbi->s_flex_groups == NULL) { | |
1923 | sbi->s_flex_groups = vmalloc(size); | |
1924 | if (sbi->s_flex_groups) | |
1925 | memset(sbi->s_flex_groups, 0, size); | |
1926 | } | |
772cb7c8 | 1927 | if (sbi->s_flex_groups == NULL) { |
b31e1552 ES |
1928 | ext4_msg(sb, KERN_ERR, "not enough memory for " |
1929 | "%u flex groups", flex_group_count); | |
772cb7c8 JS |
1930 | goto failed; |
1931 | } | |
772cb7c8 | 1932 | |
772cb7c8 | 1933 | for (i = 0; i < sbi->s_groups_count; i++) { |
88b6edd1 | 1934 | gdp = ext4_get_group_desc(sb, i, NULL); |
772cb7c8 JS |
1935 | |
1936 | flex_group = ext4_flex_group(sbi, i); | |
7ad9bb65 TT |
1937 | atomic_add(ext4_free_inodes_count(sb, gdp), |
1938 | &sbi->s_flex_groups[flex_group].free_inodes); | |
1939 | atomic_add(ext4_free_blks_count(sb, gdp), | |
1940 | &sbi->s_flex_groups[flex_group].free_blocks); | |
1941 | atomic_add(ext4_used_dirs_count(sb, gdp), | |
1942 | &sbi->s_flex_groups[flex_group].used_dirs); | |
772cb7c8 JS |
1943 | } |
1944 | ||
1945 | return 1; | |
1946 | failed: | |
1947 | return 0; | |
1948 | } | |
1949 | ||
717d50e4 AD |
1950 | __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, |
1951 | struct ext4_group_desc *gdp) | |
1952 | { | |
1953 | __u16 crc = 0; | |
1954 | ||
1955 | if (sbi->s_es->s_feature_ro_compat & | |
1956 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { | |
1957 | int offset = offsetof(struct ext4_group_desc, bg_checksum); | |
1958 | __le32 le_group = cpu_to_le32(block_group); | |
1959 | ||
1960 | crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); | |
1961 | crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); | |
1962 | crc = crc16(crc, (__u8 *)gdp, offset); | |
1963 | offset += sizeof(gdp->bg_checksum); /* skip checksum */ | |
1964 | /* for checksum of struct ext4_group_desc do the rest...*/ | |
1965 | if ((sbi->s_es->s_feature_incompat & | |
1966 | cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && | |
1967 | offset < le16_to_cpu(sbi->s_es->s_desc_size)) | |
1968 | crc = crc16(crc, (__u8 *)gdp + offset, | |
1969 | le16_to_cpu(sbi->s_es->s_desc_size) - | |
1970 | offset); | |
1971 | } | |
1972 | ||
1973 | return cpu_to_le16(crc); | |
1974 | } | |
1975 | ||
1976 | int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, | |
1977 | struct ext4_group_desc *gdp) | |
1978 | { | |
1979 | if ((sbi->s_es->s_feature_ro_compat & | |
1980 | cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && | |
1981 | (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) | |
1982 | return 0; | |
1983 | ||
1984 | return 1; | |
1985 | } | |
1986 | ||
ac27a0ec | 1987 | /* Called at mount-time, super-block is locked */ |
bfff6873 LC |
1988 | static int ext4_check_descriptors(struct super_block *sb, |
1989 | ext4_group_t *first_not_zeroed) | |
ac27a0ec | 1990 | { |
617ba13b MC |
1991 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
1992 | ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); | |
1993 | ext4_fsblk_t last_block; | |
bd81d8ee LV |
1994 | ext4_fsblk_t block_bitmap; |
1995 | ext4_fsblk_t inode_bitmap; | |
1996 | ext4_fsblk_t inode_table; | |
ce421581 | 1997 | int flexbg_flag = 0; |
bfff6873 | 1998 | ext4_group_t i, grp = sbi->s_groups_count; |
ac27a0ec | 1999 | |
ce421581 JS |
2000 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
2001 | flexbg_flag = 1; | |
2002 | ||
af5bc92d | 2003 | ext4_debug("Checking group descriptors"); |
ac27a0ec | 2004 | |
197cd65a AM |
2005 | for (i = 0; i < sbi->s_groups_count; i++) { |
2006 | struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); | |
2007 | ||
ce421581 | 2008 | if (i == sbi->s_groups_count - 1 || flexbg_flag) |
bd81d8ee | 2009 | last_block = ext4_blocks_count(sbi->s_es) - 1; |
ac27a0ec DK |
2010 | else |
2011 | last_block = first_block + | |
617ba13b | 2012 | (EXT4_BLOCKS_PER_GROUP(sb) - 1); |
ac27a0ec | 2013 | |
bfff6873 LC |
2014 | if ((grp == sbi->s_groups_count) && |
2015 | !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2016 | grp = i; | |
2017 | ||
8fadc143 | 2018 | block_bitmap = ext4_block_bitmap(sb, gdp); |
2b2d6d01 | 2019 | if (block_bitmap < first_block || block_bitmap > last_block) { |
b31e1552 | 2020 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2021 | "Block bitmap for group %u not in group " |
b31e1552 | 2022 | "(block %llu)!", i, block_bitmap); |
ac27a0ec DK |
2023 | return 0; |
2024 | } | |
8fadc143 | 2025 | inode_bitmap = ext4_inode_bitmap(sb, gdp); |
2b2d6d01 | 2026 | if (inode_bitmap < first_block || inode_bitmap > last_block) { |
b31e1552 | 2027 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2028 | "Inode bitmap for group %u not in group " |
b31e1552 | 2029 | "(block %llu)!", i, inode_bitmap); |
ac27a0ec DK |
2030 | return 0; |
2031 | } | |
8fadc143 | 2032 | inode_table = ext4_inode_table(sb, gdp); |
bd81d8ee | 2033 | if (inode_table < first_block || |
2b2d6d01 | 2034 | inode_table + sbi->s_itb_per_group - 1 > last_block) { |
b31e1552 | 2035 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
a9df9a49 | 2036 | "Inode table for group %u not in group " |
b31e1552 | 2037 | "(block %llu)!", i, inode_table); |
ac27a0ec DK |
2038 | return 0; |
2039 | } | |
955ce5f5 | 2040 | ext4_lock_group(sb, i); |
717d50e4 | 2041 | if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { |
b31e1552 ES |
2042 | ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " |
2043 | "Checksum for group %u failed (%u!=%u)", | |
2044 | i, le16_to_cpu(ext4_group_desc_csum(sbi, i, | |
2045 | gdp)), le16_to_cpu(gdp->bg_checksum)); | |
7ee1ec4c | 2046 | if (!(sb->s_flags & MS_RDONLY)) { |
955ce5f5 | 2047 | ext4_unlock_group(sb, i); |
8a266467 | 2048 | return 0; |
7ee1ec4c | 2049 | } |
717d50e4 | 2050 | } |
955ce5f5 | 2051 | ext4_unlock_group(sb, i); |
ce421581 JS |
2052 | if (!flexbg_flag) |
2053 | first_block += EXT4_BLOCKS_PER_GROUP(sb); | |
ac27a0ec | 2054 | } |
bfff6873 LC |
2055 | if (NULL != first_not_zeroed) |
2056 | *first_not_zeroed = grp; | |
ac27a0ec | 2057 | |
bd81d8ee | 2058 | ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); |
0b8e58a1 | 2059 | sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); |
ac27a0ec DK |
2060 | return 1; |
2061 | } | |
2062 | ||
617ba13b | 2063 | /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at |
ac27a0ec DK |
2064 | * the superblock) which were deleted from all directories, but held open by |
2065 | * a process at the time of a crash. We walk the list and try to delete these | |
2066 | * inodes at recovery time (only with a read-write filesystem). | |
2067 | * | |
2068 | * In order to keep the orphan inode chain consistent during traversal (in | |
2069 | * case of crash during recovery), we link each inode into the superblock | |
2070 | * orphan list_head and handle it the same way as an inode deletion during | |
2071 | * normal operation (which journals the operations for us). | |
2072 | * | |
2073 | * We only do an iget() and an iput() on each inode, which is very safe if we | |
2074 | * accidentally point at an in-use or already deleted inode. The worst that | |
2075 | * can happen in this case is that we get a "bit already cleared" message from | |
617ba13b | 2076 | * ext4_free_inode(). The only reason we would point at a wrong inode is if |
ac27a0ec DK |
2077 | * e2fsck was run on this filesystem, and it must have already done the orphan |
2078 | * inode cleanup for us, so we can safely abort without any further action. | |
2079 | */ | |
2b2d6d01 TT |
2080 | static void ext4_orphan_cleanup(struct super_block *sb, |
2081 | struct ext4_super_block *es) | |
ac27a0ec DK |
2082 | { |
2083 | unsigned int s_flags = sb->s_flags; | |
2084 | int nr_orphans = 0, nr_truncates = 0; | |
2085 | #ifdef CONFIG_QUOTA | |
2086 | int i; | |
2087 | #endif | |
2088 | if (!es->s_last_orphan) { | |
2089 | jbd_debug(4, "no orphan inodes to clean up\n"); | |
2090 | return; | |
2091 | } | |
2092 | ||
a8f48a95 | 2093 | if (bdev_read_only(sb->s_bdev)) { |
b31e1552 ES |
2094 | ext4_msg(sb, KERN_ERR, "write access " |
2095 | "unavailable, skipping orphan cleanup"); | |
a8f48a95 ES |
2096 | return; |
2097 | } | |
2098 | ||
617ba13b | 2099 | if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { |
ac27a0ec DK |
2100 | if (es->s_last_orphan) |
2101 | jbd_debug(1, "Errors on filesystem, " | |
2102 | "clearing orphan list.\n"); | |
2103 | es->s_last_orphan = 0; | |
2104 | jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); | |
2105 | return; | |
2106 | } | |
2107 | ||
2108 | if (s_flags & MS_RDONLY) { | |
b31e1552 | 2109 | ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); |
ac27a0ec DK |
2110 | sb->s_flags &= ~MS_RDONLY; |
2111 | } | |
2112 | #ifdef CONFIG_QUOTA | |
2113 | /* Needed for iput() to work correctly and not trash data */ | |
2114 | sb->s_flags |= MS_ACTIVE; | |
2115 | /* Turn on quotas so that they are updated correctly */ | |
2116 | for (i = 0; i < MAXQUOTAS; i++) { | |
617ba13b MC |
2117 | if (EXT4_SB(sb)->s_qf_names[i]) { |
2118 | int ret = ext4_quota_on_mount(sb, i); | |
ac27a0ec | 2119 | if (ret < 0) |
b31e1552 ES |
2120 | ext4_msg(sb, KERN_ERR, |
2121 | "Cannot turn on journaled " | |
2122 | "quota: error %d", ret); | |
ac27a0ec DK |
2123 | } |
2124 | } | |
2125 | #endif | |
2126 | ||
2127 | while (es->s_last_orphan) { | |
2128 | struct inode *inode; | |
2129 | ||
97bd42b9 JB |
2130 | inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); |
2131 | if (IS_ERR(inode)) { | |
ac27a0ec DK |
2132 | es->s_last_orphan = 0; |
2133 | break; | |
2134 | } | |
2135 | ||
617ba13b | 2136 | list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); |
871a2931 | 2137 | dquot_initialize(inode); |
ac27a0ec | 2138 | if (inode->i_nlink) { |
b31e1552 ES |
2139 | ext4_msg(sb, KERN_DEBUG, |
2140 | "%s: truncating inode %lu to %lld bytes", | |
46e665e9 | 2141 | __func__, inode->i_ino, inode->i_size); |
e5f8eab8 | 2142 | jbd_debug(2, "truncating inode %lu to %lld bytes\n", |
ac27a0ec | 2143 | inode->i_ino, inode->i_size); |
617ba13b | 2144 | ext4_truncate(inode); |
ac27a0ec DK |
2145 | nr_truncates++; |
2146 | } else { | |
b31e1552 ES |
2147 | ext4_msg(sb, KERN_DEBUG, |
2148 | "%s: deleting unreferenced inode %lu", | |
46e665e9 | 2149 | __func__, inode->i_ino); |
ac27a0ec DK |
2150 | jbd_debug(2, "deleting unreferenced inode %lu\n", |
2151 | inode->i_ino); | |
2152 | nr_orphans++; | |
2153 | } | |
2154 | iput(inode); /* The delete magic happens here! */ | |
2155 | } | |
2156 | ||
2b2d6d01 | 2157 | #define PLURAL(x) (x), ((x) == 1) ? "" : "s" |
ac27a0ec DK |
2158 | |
2159 | if (nr_orphans) | |
b31e1552 ES |
2160 | ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", |
2161 | PLURAL(nr_orphans)); | |
ac27a0ec | 2162 | if (nr_truncates) |
b31e1552 ES |
2163 | ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", |
2164 | PLURAL(nr_truncates)); | |
ac27a0ec DK |
2165 | #ifdef CONFIG_QUOTA |
2166 | /* Turn quotas off */ | |
2167 | for (i = 0; i < MAXQUOTAS; i++) { | |
2168 | if (sb_dqopt(sb)->files[i]) | |
287a8095 | 2169 | dquot_quota_off(sb, i); |
ac27a0ec DK |
2170 | } |
2171 | #endif | |
2172 | sb->s_flags = s_flags; /* Restore MS_RDONLY status */ | |
2173 | } | |
0b8e58a1 | 2174 | |
cd2291a4 ES |
2175 | /* |
2176 | * Maximal extent format file size. | |
2177 | * Resulting logical blkno at s_maxbytes must fit in our on-disk | |
2178 | * extent format containers, within a sector_t, and within i_blocks | |
2179 | * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, | |
2180 | * so that won't be a limiting factor. | |
2181 | * | |
2182 | * Note, this does *not* consider any metadata overhead for vfs i_blocks. | |
2183 | */ | |
f287a1a5 | 2184 | static loff_t ext4_max_size(int blkbits, int has_huge_files) |
cd2291a4 ES |
2185 | { |
2186 | loff_t res; | |
2187 | loff_t upper_limit = MAX_LFS_FILESIZE; | |
2188 | ||
2189 | /* small i_blocks in vfs inode? */ | |
f287a1a5 | 2190 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
cd2291a4 | 2191 | /* |
90c699a9 | 2192 | * CONFIG_LBDAF is not enabled implies the inode |
cd2291a4 ES |
2193 | * i_block represent total blocks in 512 bytes |
2194 | * 32 == size of vfs inode i_blocks * 8 | |
2195 | */ | |
2196 | upper_limit = (1LL << 32) - 1; | |
2197 | ||
2198 | /* total blocks in file system block size */ | |
2199 | upper_limit >>= (blkbits - 9); | |
2200 | upper_limit <<= blkbits; | |
2201 | } | |
2202 | ||
2203 | /* 32-bit extent-start container, ee_block */ | |
2204 | res = 1LL << 32; | |
2205 | res <<= blkbits; | |
2206 | res -= 1; | |
2207 | ||
2208 | /* Sanity check against vm- & vfs- imposed limits */ | |
2209 | if (res > upper_limit) | |
2210 | res = upper_limit; | |
2211 | ||
2212 | return res; | |
2213 | } | |
ac27a0ec | 2214 | |
ac27a0ec | 2215 | /* |
cd2291a4 | 2216 | * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect |
0fc1b451 AK |
2217 | * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. |
2218 | * We need to be 1 filesystem block less than the 2^48 sector limit. | |
ac27a0ec | 2219 | */ |
f287a1a5 | 2220 | static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) |
ac27a0ec | 2221 | { |
617ba13b | 2222 | loff_t res = EXT4_NDIR_BLOCKS; |
0fc1b451 AK |
2223 | int meta_blocks; |
2224 | loff_t upper_limit; | |
0b8e58a1 AD |
2225 | /* This is calculated to be the largest file size for a dense, block |
2226 | * mapped file such that the file's total number of 512-byte sectors, | |
2227 | * including data and all indirect blocks, does not exceed (2^48 - 1). | |
2228 | * | |
2229 | * __u32 i_blocks_lo and _u16 i_blocks_high represent the total | |
2230 | * number of 512-byte sectors of the file. | |
0fc1b451 AK |
2231 | */ |
2232 | ||
f287a1a5 | 2233 | if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { |
0fc1b451 | 2234 | /* |
90c699a9 | 2235 | * !has_huge_files or CONFIG_LBDAF not enabled implies that |
0b8e58a1 AD |
2236 | * the inode i_block field represents total file blocks in |
2237 | * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 | |
0fc1b451 AK |
2238 | */ |
2239 | upper_limit = (1LL << 32) - 1; | |
2240 | ||
2241 | /* total blocks in file system block size */ | |
2242 | upper_limit >>= (bits - 9); | |
2243 | ||
2244 | } else { | |
8180a562 AK |
2245 | /* |
2246 | * We use 48 bit ext4_inode i_blocks | |
2247 | * With EXT4_HUGE_FILE_FL set the i_blocks | |
2248 | * represent total number of blocks in | |
2249 | * file system block size | |
2250 | */ | |
0fc1b451 AK |
2251 | upper_limit = (1LL << 48) - 1; |
2252 | ||
0fc1b451 AK |
2253 | } |
2254 | ||
2255 | /* indirect blocks */ | |
2256 | meta_blocks = 1; | |
2257 | /* double indirect blocks */ | |
2258 | meta_blocks += 1 + (1LL << (bits-2)); | |
2259 | /* tripple indirect blocks */ | |
2260 | meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); | |
2261 | ||
2262 | upper_limit -= meta_blocks; | |
2263 | upper_limit <<= bits; | |
ac27a0ec DK |
2264 | |
2265 | res += 1LL << (bits-2); | |
2266 | res += 1LL << (2*(bits-2)); | |
2267 | res += 1LL << (3*(bits-2)); | |
2268 | res <<= bits; | |
2269 | if (res > upper_limit) | |
2270 | res = upper_limit; | |
0fc1b451 AK |
2271 | |
2272 | if (res > MAX_LFS_FILESIZE) | |
2273 | res = MAX_LFS_FILESIZE; | |
2274 | ||
ac27a0ec DK |
2275 | return res; |
2276 | } | |
2277 | ||
617ba13b | 2278 | static ext4_fsblk_t descriptor_loc(struct super_block *sb, |
0b8e58a1 | 2279 | ext4_fsblk_t logical_sb_block, int nr) |
ac27a0ec | 2280 | { |
617ba13b | 2281 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
fd2d4291 | 2282 | ext4_group_t bg, first_meta_bg; |
ac27a0ec DK |
2283 | int has_super = 0; |
2284 | ||
2285 | first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); | |
2286 | ||
617ba13b | 2287 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || |
ac27a0ec | 2288 | nr < first_meta_bg) |
70bbb3e0 | 2289 | return logical_sb_block + nr + 1; |
ac27a0ec | 2290 | bg = sbi->s_desc_per_block * nr; |
617ba13b | 2291 | if (ext4_bg_has_super(sb, bg)) |
ac27a0ec | 2292 | has_super = 1; |
0b8e58a1 | 2293 | |
617ba13b | 2294 | return (has_super + ext4_group_first_block_no(sb, bg)); |
ac27a0ec DK |
2295 | } |
2296 | ||
c9de560d AT |
2297 | /** |
2298 | * ext4_get_stripe_size: Get the stripe size. | |
2299 | * @sbi: In memory super block info | |
2300 | * | |
2301 | * If we have specified it via mount option, then | |
2302 | * use the mount option value. If the value specified at mount time is | |
2303 | * greater than the blocks per group use the super block value. | |
2304 | * If the super block value is greater than blocks per group return 0. | |
2305 | * Allocator needs it be less than blocks per group. | |
2306 | * | |
2307 | */ | |
2308 | static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) | |
2309 | { | |
2310 | unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); | |
2311 | unsigned long stripe_width = | |
2312 | le32_to_cpu(sbi->s_es->s_raid_stripe_width); | |
2313 | ||
2314 | if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) | |
2315 | return sbi->s_stripe; | |
2316 | ||
2317 | if (stripe_width <= sbi->s_blocks_per_group) | |
2318 | return stripe_width; | |
2319 | ||
2320 | if (stride <= sbi->s_blocks_per_group) | |
2321 | return stride; | |
2322 | ||
2323 | return 0; | |
2324 | } | |
ac27a0ec | 2325 | |
3197ebdb TT |
2326 | /* sysfs supprt */ |
2327 | ||
2328 | struct ext4_attr { | |
2329 | struct attribute attr; | |
2330 | ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); | |
60e6679e | 2331 | ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, |
3197ebdb TT |
2332 | const char *, size_t); |
2333 | int offset; | |
2334 | }; | |
2335 | ||
2336 | static int parse_strtoul(const char *buf, | |
2337 | unsigned long max, unsigned long *value) | |
2338 | { | |
2339 | char *endp; | |
2340 | ||
e7d2860b AGR |
2341 | *value = simple_strtoul(skip_spaces(buf), &endp, 0); |
2342 | endp = skip_spaces(endp); | |
3197ebdb TT |
2343 | if (*endp || *value > max) |
2344 | return -EINVAL; | |
2345 | ||
2346 | return 0; | |
2347 | } | |
2348 | ||
2349 | static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, | |
2350 | struct ext4_sb_info *sbi, | |
2351 | char *buf) | |
2352 | { | |
2353 | return snprintf(buf, PAGE_SIZE, "%llu\n", | |
2354 | (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); | |
2355 | } | |
2356 | ||
2357 | static ssize_t session_write_kbytes_show(struct ext4_attr *a, | |
2358 | struct ext4_sb_info *sbi, char *buf) | |
2359 | { | |
2360 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2361 | ||
f613dfcb TT |
2362 | if (!sb->s_bdev->bd_part) |
2363 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb TT |
2364 | return snprintf(buf, PAGE_SIZE, "%lu\n", |
2365 | (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - | |
2366 | sbi->s_sectors_written_start) >> 1); | |
2367 | } | |
2368 | ||
2369 | static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, | |
2370 | struct ext4_sb_info *sbi, char *buf) | |
2371 | { | |
2372 | struct super_block *sb = sbi->s_buddy_cache->i_sb; | |
2373 | ||
f613dfcb TT |
2374 | if (!sb->s_bdev->bd_part) |
2375 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
3197ebdb | 2376 | return snprintf(buf, PAGE_SIZE, "%llu\n", |
a6b43e38 | 2377 | (unsigned long long)(sbi->s_kbytes_written + |
3197ebdb | 2378 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
a6b43e38 | 2379 | EXT4_SB(sb)->s_sectors_written_start) >> 1))); |
3197ebdb TT |
2380 | } |
2381 | ||
2382 | static ssize_t inode_readahead_blks_store(struct ext4_attr *a, | |
2383 | struct ext4_sb_info *sbi, | |
2384 | const char *buf, size_t count) | |
2385 | { | |
2386 | unsigned long t; | |
2387 | ||
2388 | if (parse_strtoul(buf, 0x40000000, &t)) | |
2389 | return -EINVAL; | |
2390 | ||
f7c43950 | 2391 | if (!is_power_of_2(t)) |
3197ebdb TT |
2392 | return -EINVAL; |
2393 | ||
2394 | sbi->s_inode_readahead_blks = t; | |
2395 | return count; | |
2396 | } | |
2397 | ||
2398 | static ssize_t sbi_ui_show(struct ext4_attr *a, | |
0b8e58a1 | 2399 | struct ext4_sb_info *sbi, char *buf) |
3197ebdb TT |
2400 | { |
2401 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2402 | ||
2403 | return snprintf(buf, PAGE_SIZE, "%u\n", *ui); | |
2404 | } | |
2405 | ||
2406 | static ssize_t sbi_ui_store(struct ext4_attr *a, | |
2407 | struct ext4_sb_info *sbi, | |
2408 | const char *buf, size_t count) | |
2409 | { | |
2410 | unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); | |
2411 | unsigned long t; | |
2412 | ||
2413 | if (parse_strtoul(buf, 0xffffffff, &t)) | |
2414 | return -EINVAL; | |
2415 | *ui = t; | |
2416 | return count; | |
2417 | } | |
2418 | ||
2419 | #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ | |
2420 | static struct ext4_attr ext4_attr_##_name = { \ | |
2421 | .attr = {.name = __stringify(_name), .mode = _mode }, \ | |
2422 | .show = _show, \ | |
2423 | .store = _store, \ | |
2424 | .offset = offsetof(struct ext4_sb_info, _elname), \ | |
2425 | } | |
2426 | #define EXT4_ATTR(name, mode, show, store) \ | |
2427 | static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) | |
2428 | ||
857ac889 | 2429 | #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) |
3197ebdb TT |
2430 | #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) |
2431 | #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) | |
2432 | #define EXT4_RW_ATTR_SBI_UI(name, elname) \ | |
2433 | EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) | |
2434 | #define ATTR_LIST(name) &ext4_attr_##name.attr | |
2435 | ||
2436 | EXT4_RO_ATTR(delayed_allocation_blocks); | |
2437 | EXT4_RO_ATTR(session_write_kbytes); | |
2438 | EXT4_RO_ATTR(lifetime_write_kbytes); | |
2439 | EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, | |
2440 | inode_readahead_blks_store, s_inode_readahead_blks); | |
11013911 | 2441 | EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); |
3197ebdb TT |
2442 | EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); |
2443 | EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); | |
2444 | EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); | |
2445 | EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); | |
2446 | EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); | |
2447 | EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); | |
55138e0b | 2448 | EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); |
3197ebdb TT |
2449 | |
2450 | static struct attribute *ext4_attrs[] = { | |
2451 | ATTR_LIST(delayed_allocation_blocks), | |
2452 | ATTR_LIST(session_write_kbytes), | |
2453 | ATTR_LIST(lifetime_write_kbytes), | |
2454 | ATTR_LIST(inode_readahead_blks), | |
11013911 | 2455 | ATTR_LIST(inode_goal), |
3197ebdb TT |
2456 | ATTR_LIST(mb_stats), |
2457 | ATTR_LIST(mb_max_to_scan), | |
2458 | ATTR_LIST(mb_min_to_scan), | |
2459 | ATTR_LIST(mb_order2_req), | |
2460 | ATTR_LIST(mb_stream_req), | |
2461 | ATTR_LIST(mb_group_prealloc), | |
55138e0b | 2462 | ATTR_LIST(max_writeback_mb_bump), |
3197ebdb TT |
2463 | NULL, |
2464 | }; | |
2465 | ||
857ac889 LC |
2466 | /* Features this copy of ext4 supports */ |
2467 | EXT4_INFO_ATTR(lazy_itable_init); | |
27ee40df | 2468 | EXT4_INFO_ATTR(batched_discard); |
857ac889 LC |
2469 | |
2470 | static struct attribute *ext4_feat_attrs[] = { | |
2471 | ATTR_LIST(lazy_itable_init), | |
27ee40df | 2472 | ATTR_LIST(batched_discard), |
857ac889 LC |
2473 | NULL, |
2474 | }; | |
2475 | ||
3197ebdb TT |
2476 | static ssize_t ext4_attr_show(struct kobject *kobj, |
2477 | struct attribute *attr, char *buf) | |
2478 | { | |
2479 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2480 | s_kobj); | |
2481 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2482 | ||
2483 | return a->show ? a->show(a, sbi, buf) : 0; | |
2484 | } | |
2485 | ||
2486 | static ssize_t ext4_attr_store(struct kobject *kobj, | |
2487 | struct attribute *attr, | |
2488 | const char *buf, size_t len) | |
2489 | { | |
2490 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2491 | s_kobj); | |
2492 | struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); | |
2493 | ||
2494 | return a->store ? a->store(a, sbi, buf, len) : 0; | |
2495 | } | |
2496 | ||
2497 | static void ext4_sb_release(struct kobject *kobj) | |
2498 | { | |
2499 | struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, | |
2500 | s_kobj); | |
2501 | complete(&sbi->s_kobj_unregister); | |
2502 | } | |
2503 | ||
52cf25d0 | 2504 | static const struct sysfs_ops ext4_attr_ops = { |
3197ebdb TT |
2505 | .show = ext4_attr_show, |
2506 | .store = ext4_attr_store, | |
2507 | }; | |
2508 | ||
2509 | static struct kobj_type ext4_ktype = { | |
2510 | .default_attrs = ext4_attrs, | |
2511 | .sysfs_ops = &ext4_attr_ops, | |
2512 | .release = ext4_sb_release, | |
2513 | }; | |
2514 | ||
857ac889 LC |
2515 | static void ext4_feat_release(struct kobject *kobj) |
2516 | { | |
2517 | complete(&ext4_feat->f_kobj_unregister); | |
2518 | } | |
2519 | ||
2520 | static struct kobj_type ext4_feat_ktype = { | |
2521 | .default_attrs = ext4_feat_attrs, | |
2522 | .sysfs_ops = &ext4_attr_ops, | |
2523 | .release = ext4_feat_release, | |
2524 | }; | |
2525 | ||
a13fb1a4 ES |
2526 | /* |
2527 | * Check whether this filesystem can be mounted based on | |
2528 | * the features present and the RDONLY/RDWR mount requested. | |
2529 | * Returns 1 if this filesystem can be mounted as requested, | |
2530 | * 0 if it cannot be. | |
2531 | */ | |
2532 | static int ext4_feature_set_ok(struct super_block *sb, int readonly) | |
2533 | { | |
2534 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { | |
2535 | ext4_msg(sb, KERN_ERR, | |
2536 | "Couldn't mount because of " | |
2537 | "unsupported optional features (%x)", | |
2538 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & | |
2539 | ~EXT4_FEATURE_INCOMPAT_SUPP)); | |
2540 | return 0; | |
2541 | } | |
2542 | ||
2543 | if (readonly) | |
2544 | return 1; | |
2545 | ||
2546 | /* Check that feature set is OK for a read-write mount */ | |
2547 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { | |
2548 | ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " | |
2549 | "unsupported optional features (%x)", | |
2550 | (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & | |
2551 | ~EXT4_FEATURE_RO_COMPAT_SUPP)); | |
2552 | return 0; | |
2553 | } | |
2554 | /* | |
2555 | * Large file size enabled file system can only be mounted | |
2556 | * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF | |
2557 | */ | |
2558 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { | |
2559 | if (sizeof(blkcnt_t) < sizeof(u64)) { | |
2560 | ext4_msg(sb, KERN_ERR, "Filesystem with huge files " | |
2561 | "cannot be mounted RDWR without " | |
2562 | "CONFIG_LBDAF"); | |
2563 | return 0; | |
2564 | } | |
2565 | } | |
2566 | return 1; | |
2567 | } | |
2568 | ||
66e61a9e TT |
2569 | /* |
2570 | * This function is called once a day if we have errors logged | |
2571 | * on the file system | |
2572 | */ | |
2573 | static void print_daily_error_info(unsigned long arg) | |
2574 | { | |
2575 | struct super_block *sb = (struct super_block *) arg; | |
2576 | struct ext4_sb_info *sbi; | |
2577 | struct ext4_super_block *es; | |
2578 | ||
2579 | sbi = EXT4_SB(sb); | |
2580 | es = sbi->s_es; | |
2581 | ||
2582 | if (es->s_error_count) | |
2583 | ext4_msg(sb, KERN_NOTICE, "error count: %u", | |
2584 | le32_to_cpu(es->s_error_count)); | |
2585 | if (es->s_first_error_time) { | |
2586 | printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", | |
2587 | sb->s_id, le32_to_cpu(es->s_first_error_time), | |
2588 | (int) sizeof(es->s_first_error_func), | |
2589 | es->s_first_error_func, | |
2590 | le32_to_cpu(es->s_first_error_line)); | |
2591 | if (es->s_first_error_ino) | |
2592 | printk(": inode %u", | |
2593 | le32_to_cpu(es->s_first_error_ino)); | |
2594 | if (es->s_first_error_block) | |
2595 | printk(": block %llu", (unsigned long long) | |
2596 | le64_to_cpu(es->s_first_error_block)); | |
2597 | printk("\n"); | |
2598 | } | |
2599 | if (es->s_last_error_time) { | |
2600 | printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", | |
2601 | sb->s_id, le32_to_cpu(es->s_last_error_time), | |
2602 | (int) sizeof(es->s_last_error_func), | |
2603 | es->s_last_error_func, | |
2604 | le32_to_cpu(es->s_last_error_line)); | |
2605 | if (es->s_last_error_ino) | |
2606 | printk(": inode %u", | |
2607 | le32_to_cpu(es->s_last_error_ino)); | |
2608 | if (es->s_last_error_block) | |
2609 | printk(": block %llu", (unsigned long long) | |
2610 | le64_to_cpu(es->s_last_error_block)); | |
2611 | printk("\n"); | |
2612 | } | |
2613 | mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ | |
2614 | } | |
2615 | ||
bfff6873 LC |
2616 | static void ext4_lazyinode_timeout(unsigned long data) |
2617 | { | |
2618 | struct task_struct *p = (struct task_struct *)data; | |
2619 | wake_up_process(p); | |
2620 | } | |
2621 | ||
2622 | /* Find next suitable group and run ext4_init_inode_table */ | |
2623 | static int ext4_run_li_request(struct ext4_li_request *elr) | |
2624 | { | |
2625 | struct ext4_group_desc *gdp = NULL; | |
2626 | ext4_group_t group, ngroups; | |
2627 | struct super_block *sb; | |
2628 | unsigned long timeout = 0; | |
2629 | int ret = 0; | |
2630 | ||
2631 | sb = elr->lr_super; | |
2632 | ngroups = EXT4_SB(sb)->s_groups_count; | |
2633 | ||
2634 | for (group = elr->lr_next_group; group < ngroups; group++) { | |
2635 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2636 | if (!gdp) { | |
2637 | ret = 1; | |
2638 | break; | |
2639 | } | |
2640 | ||
2641 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2642 | break; | |
2643 | } | |
2644 | ||
2645 | if (group == ngroups) | |
2646 | ret = 1; | |
2647 | ||
2648 | if (!ret) { | |
2649 | timeout = jiffies; | |
2650 | ret = ext4_init_inode_table(sb, group, | |
2651 | elr->lr_timeout ? 0 : 1); | |
2652 | if (elr->lr_timeout == 0) { | |
2653 | timeout = jiffies - timeout; | |
2654 | if (elr->lr_sbi->s_li_wait_mult) | |
2655 | timeout *= elr->lr_sbi->s_li_wait_mult; | |
2656 | else | |
2657 | timeout *= 20; | |
2658 | elr->lr_timeout = timeout; | |
2659 | } | |
2660 | elr->lr_next_sched = jiffies + elr->lr_timeout; | |
2661 | elr->lr_next_group = group + 1; | |
2662 | } | |
2663 | ||
2664 | return ret; | |
2665 | } | |
2666 | ||
2667 | /* | |
2668 | * Remove lr_request from the list_request and free the | |
2669 | * request tructure. Should be called with li_list_mtx held | |
2670 | */ | |
2671 | static void ext4_remove_li_request(struct ext4_li_request *elr) | |
2672 | { | |
2673 | struct ext4_sb_info *sbi; | |
2674 | ||
2675 | if (!elr) | |
2676 | return; | |
2677 | ||
2678 | sbi = elr->lr_sbi; | |
2679 | ||
2680 | list_del(&elr->lr_request); | |
2681 | sbi->s_li_request = NULL; | |
2682 | kfree(elr); | |
2683 | } | |
2684 | ||
2685 | static void ext4_unregister_li_request(struct super_block *sb) | |
2686 | { | |
2687 | struct ext4_li_request *elr = EXT4_SB(sb)->s_li_request; | |
2688 | ||
2689 | if (!ext4_li_info) | |
2690 | return; | |
2691 | ||
2692 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2693 | ext4_remove_li_request(elr); | |
2694 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2695 | } | |
2696 | ||
2697 | /* | |
2698 | * This is the function where ext4lazyinit thread lives. It walks | |
2699 | * through the request list searching for next scheduled filesystem. | |
2700 | * When such a fs is found, run the lazy initialization request | |
2701 | * (ext4_rn_li_request) and keep track of the time spend in this | |
2702 | * function. Based on that time we compute next schedule time of | |
2703 | * the request. When walking through the list is complete, compute | |
2704 | * next waking time and put itself into sleep. | |
2705 | */ | |
2706 | static int ext4_lazyinit_thread(void *arg) | |
2707 | { | |
2708 | struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; | |
2709 | struct list_head *pos, *n; | |
2710 | struct ext4_li_request *elr; | |
2711 | unsigned long next_wakeup; | |
2712 | DEFINE_WAIT(wait); | |
bfff6873 LC |
2713 | |
2714 | BUG_ON(NULL == eli); | |
2715 | ||
2716 | eli->li_timer.data = (unsigned long)current; | |
2717 | eli->li_timer.function = ext4_lazyinode_timeout; | |
2718 | ||
2719 | eli->li_task = current; | |
2720 | wake_up(&eli->li_wait_task); | |
2721 | ||
2722 | cont_thread: | |
2723 | while (true) { | |
2724 | next_wakeup = MAX_JIFFY_OFFSET; | |
2725 | ||
2726 | mutex_lock(&eli->li_list_mtx); | |
2727 | if (list_empty(&eli->li_request_list)) { | |
2728 | mutex_unlock(&eli->li_list_mtx); | |
2729 | goto exit_thread; | |
2730 | } | |
2731 | ||
2732 | list_for_each_safe(pos, n, &eli->li_request_list) { | |
2733 | elr = list_entry(pos, struct ext4_li_request, | |
2734 | lr_request); | |
2735 | ||
b2c78cd0 TT |
2736 | if (time_after_eq(jiffies, elr->lr_next_sched)) { |
2737 | if (ext4_run_li_request(elr) != 0) { | |
2738 | /* error, remove the lazy_init job */ | |
2739 | ext4_remove_li_request(elr); | |
2740 | continue; | |
2741 | } | |
bfff6873 LC |
2742 | } |
2743 | ||
2744 | if (time_before(elr->lr_next_sched, next_wakeup)) | |
2745 | next_wakeup = elr->lr_next_sched; | |
2746 | } | |
2747 | mutex_unlock(&eli->li_list_mtx); | |
2748 | ||
2749 | if (freezing(current)) | |
2750 | refrigerator(); | |
2751 | ||
f4245bd4 LC |
2752 | if ((time_after_eq(jiffies, next_wakeup)) || |
2753 | (MAX_JIFFY_OFFSET == next_wakeup)) { | |
bfff6873 LC |
2754 | cond_resched(); |
2755 | continue; | |
2756 | } | |
2757 | ||
2758 | eli->li_timer.expires = next_wakeup; | |
2759 | add_timer(&eli->li_timer); | |
2760 | prepare_to_wait(&eli->li_wait_daemon, &wait, | |
2761 | TASK_INTERRUPTIBLE); | |
2762 | if (time_before(jiffies, next_wakeup)) | |
2763 | schedule(); | |
2764 | finish_wait(&eli->li_wait_daemon, &wait); | |
2765 | } | |
2766 | ||
2767 | exit_thread: | |
2768 | /* | |
2769 | * It looks like the request list is empty, but we need | |
2770 | * to check it under the li_list_mtx lock, to prevent any | |
2771 | * additions into it, and of course we should lock ext4_li_mtx | |
2772 | * to atomically free the list and ext4_li_info, because at | |
2773 | * this point another ext4 filesystem could be registering | |
2774 | * new one. | |
2775 | */ | |
2776 | mutex_lock(&ext4_li_mtx); | |
2777 | mutex_lock(&eli->li_list_mtx); | |
2778 | if (!list_empty(&eli->li_request_list)) { | |
2779 | mutex_unlock(&eli->li_list_mtx); | |
2780 | mutex_unlock(&ext4_li_mtx); | |
2781 | goto cont_thread; | |
2782 | } | |
2783 | mutex_unlock(&eli->li_list_mtx); | |
2784 | del_timer_sync(&ext4_li_info->li_timer); | |
2785 | eli->li_task = NULL; | |
2786 | wake_up(&eli->li_wait_task); | |
2787 | ||
2788 | kfree(ext4_li_info); | |
2789 | ext4_li_info = NULL; | |
2790 | mutex_unlock(&ext4_li_mtx); | |
2791 | ||
2792 | return 0; | |
2793 | } | |
2794 | ||
2795 | static void ext4_clear_request_list(void) | |
2796 | { | |
2797 | struct list_head *pos, *n; | |
2798 | struct ext4_li_request *elr; | |
2799 | ||
2800 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2801 | if (list_empty(&ext4_li_info->li_request_list)) | |
2802 | return; | |
2803 | ||
2804 | list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { | |
2805 | elr = list_entry(pos, struct ext4_li_request, | |
2806 | lr_request); | |
2807 | ext4_remove_li_request(elr); | |
2808 | } | |
2809 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2810 | } | |
2811 | ||
2812 | static int ext4_run_lazyinit_thread(void) | |
2813 | { | |
2814 | struct task_struct *t; | |
2815 | ||
2816 | t = kthread_run(ext4_lazyinit_thread, ext4_li_info, "ext4lazyinit"); | |
2817 | if (IS_ERR(t)) { | |
2818 | int err = PTR_ERR(t); | |
2819 | ext4_clear_request_list(); | |
2820 | del_timer_sync(&ext4_li_info->li_timer); | |
2821 | kfree(ext4_li_info); | |
2822 | ext4_li_info = NULL; | |
2823 | printk(KERN_CRIT "EXT4: error %d creating inode table " | |
2824 | "initialization thread\n", | |
2825 | err); | |
2826 | return err; | |
2827 | } | |
2828 | ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; | |
2829 | ||
2830 | wait_event(ext4_li_info->li_wait_task, ext4_li_info->li_task != NULL); | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | /* | |
2835 | * Check whether it make sense to run itable init. thread or not. | |
2836 | * If there is at least one uninitialized inode table, return | |
2837 | * corresponding group number, else the loop goes through all | |
2838 | * groups and return total number of groups. | |
2839 | */ | |
2840 | static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) | |
2841 | { | |
2842 | ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; | |
2843 | struct ext4_group_desc *gdp = NULL; | |
2844 | ||
2845 | for (group = 0; group < ngroups; group++) { | |
2846 | gdp = ext4_get_group_desc(sb, group, NULL); | |
2847 | if (!gdp) | |
2848 | continue; | |
2849 | ||
2850 | if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) | |
2851 | break; | |
2852 | } | |
2853 | ||
2854 | return group; | |
2855 | } | |
2856 | ||
2857 | static int ext4_li_info_new(void) | |
2858 | { | |
2859 | struct ext4_lazy_init *eli = NULL; | |
2860 | ||
2861 | eli = kzalloc(sizeof(*eli), GFP_KERNEL); | |
2862 | if (!eli) | |
2863 | return -ENOMEM; | |
2864 | ||
2865 | eli->li_task = NULL; | |
2866 | INIT_LIST_HEAD(&eli->li_request_list); | |
2867 | mutex_init(&eli->li_list_mtx); | |
2868 | ||
2869 | init_waitqueue_head(&eli->li_wait_daemon); | |
2870 | init_waitqueue_head(&eli->li_wait_task); | |
2871 | init_timer(&eli->li_timer); | |
2872 | eli->li_state |= EXT4_LAZYINIT_QUIT; | |
2873 | ||
2874 | ext4_li_info = eli; | |
2875 | ||
2876 | return 0; | |
2877 | } | |
2878 | ||
2879 | static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, | |
2880 | ext4_group_t start) | |
2881 | { | |
2882 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2883 | struct ext4_li_request *elr; | |
2884 | unsigned long rnd; | |
2885 | ||
2886 | elr = kzalloc(sizeof(*elr), GFP_KERNEL); | |
2887 | if (!elr) | |
2888 | return NULL; | |
2889 | ||
2890 | elr->lr_super = sb; | |
2891 | elr->lr_sbi = sbi; | |
2892 | elr->lr_next_group = start; | |
2893 | ||
2894 | /* | |
2895 | * Randomize first schedule time of the request to | |
2896 | * spread the inode table initialization requests | |
2897 | * better. | |
2898 | */ | |
2899 | get_random_bytes(&rnd, sizeof(rnd)); | |
2900 | elr->lr_next_sched = jiffies + (unsigned long)rnd % | |
2901 | (EXT4_DEF_LI_MAX_START_DELAY * HZ); | |
2902 | ||
2903 | return elr; | |
2904 | } | |
2905 | ||
2906 | static int ext4_register_li_request(struct super_block *sb, | |
2907 | ext4_group_t first_not_zeroed) | |
2908 | { | |
2909 | struct ext4_sb_info *sbi = EXT4_SB(sb); | |
2910 | struct ext4_li_request *elr; | |
2911 | ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; | |
beed5ecb | 2912 | int ret; |
bfff6873 LC |
2913 | |
2914 | if (sbi->s_li_request != NULL) | |
beed5ecb | 2915 | return 0; |
bfff6873 LC |
2916 | |
2917 | if (first_not_zeroed == ngroups || | |
2918 | (sb->s_flags & MS_RDONLY) || | |
2919 | !test_opt(sb, INIT_INODE_TABLE)) { | |
2920 | sbi->s_li_request = NULL; | |
beed5ecb | 2921 | return 0; |
bfff6873 LC |
2922 | } |
2923 | ||
2924 | if (first_not_zeroed == ngroups) { | |
2925 | sbi->s_li_request = NULL; | |
beed5ecb | 2926 | return 0; |
bfff6873 LC |
2927 | } |
2928 | ||
2929 | elr = ext4_li_request_new(sb, first_not_zeroed); | |
beed5ecb NK |
2930 | if (!elr) |
2931 | return -ENOMEM; | |
bfff6873 LC |
2932 | |
2933 | mutex_lock(&ext4_li_mtx); | |
2934 | ||
2935 | if (NULL == ext4_li_info) { | |
2936 | ret = ext4_li_info_new(); | |
2937 | if (ret) | |
2938 | goto out; | |
2939 | } | |
2940 | ||
2941 | mutex_lock(&ext4_li_info->li_list_mtx); | |
2942 | list_add(&elr->lr_request, &ext4_li_info->li_request_list); | |
2943 | mutex_unlock(&ext4_li_info->li_list_mtx); | |
2944 | ||
2945 | sbi->s_li_request = elr; | |
2946 | ||
2947 | if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { | |
2948 | ret = ext4_run_lazyinit_thread(); | |
2949 | if (ret) | |
2950 | goto out; | |
2951 | } | |
bfff6873 | 2952 | out: |
beed5ecb NK |
2953 | mutex_unlock(&ext4_li_mtx); |
2954 | if (ret) | |
bfff6873 | 2955 | kfree(elr); |
bfff6873 LC |
2956 | return ret; |
2957 | } | |
2958 | ||
2959 | /* | |
2960 | * We do not need to lock anything since this is called on | |
2961 | * module unload. | |
2962 | */ | |
2963 | static void ext4_destroy_lazyinit_thread(void) | |
2964 | { | |
2965 | /* | |
2966 | * If thread exited earlier | |
2967 | * there's nothing to be done. | |
2968 | */ | |
2969 | if (!ext4_li_info) | |
2970 | return; | |
2971 | ||
2972 | ext4_clear_request_list(); | |
2973 | ||
2974 | while (ext4_li_info->li_task) { | |
2975 | wake_up(&ext4_li_info->li_wait_daemon); | |
2976 | wait_event(ext4_li_info->li_wait_task, | |
2977 | ext4_li_info->li_task == NULL); | |
2978 | } | |
2979 | } | |
2980 | ||
2b2d6d01 | 2981 | static int ext4_fill_super(struct super_block *sb, void *data, int silent) |
7477827f AK |
2982 | __releases(kernel_lock) |
2983 | __acquires(kernel_lock) | |
ac27a0ec | 2984 | { |
d4c402d9 | 2985 | char *orig_data = kstrdup(data, GFP_KERNEL); |
2b2d6d01 | 2986 | struct buffer_head *bh; |
617ba13b MC |
2987 | struct ext4_super_block *es = NULL; |
2988 | struct ext4_sb_info *sbi; | |
2989 | ext4_fsblk_t block; | |
2990 | ext4_fsblk_t sb_block = get_sb_block(&data); | |
70bbb3e0 | 2991 | ext4_fsblk_t logical_sb_block; |
ac27a0ec | 2992 | unsigned long offset = 0; |
ac27a0ec DK |
2993 | unsigned long journal_devnum = 0; |
2994 | unsigned long def_mount_opts; | |
2995 | struct inode *root; | |
9f6200bb | 2996 | char *cp; |
0390131b | 2997 | const char *descr; |
dcc7dae3 | 2998 | int ret = -ENOMEM; |
ac27a0ec | 2999 | int blocksize; |
4ec11028 TT |
3000 | unsigned int db_count; |
3001 | unsigned int i; | |
f287a1a5 | 3002 | int needs_recovery, has_huge_files; |
bd81d8ee | 3003 | __u64 blocks_count; |
833f4077 | 3004 | int err; |
b3881f74 | 3005 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
bfff6873 | 3006 | ext4_group_t first_not_zeroed; |
ac27a0ec DK |
3007 | |
3008 | sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); | |
3009 | if (!sbi) | |
dcc7dae3 | 3010 | goto out_free_orig; |
705895b6 PE |
3011 | |
3012 | sbi->s_blockgroup_lock = | |
3013 | kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); | |
3014 | if (!sbi->s_blockgroup_lock) { | |
3015 | kfree(sbi); | |
dcc7dae3 | 3016 | goto out_free_orig; |
705895b6 | 3017 | } |
ac27a0ec DK |
3018 | sb->s_fs_info = sbi; |
3019 | sbi->s_mount_opt = 0; | |
617ba13b MC |
3020 | sbi->s_resuid = EXT4_DEF_RESUID; |
3021 | sbi->s_resgid = EXT4_DEF_RESGID; | |
240799cd | 3022 | sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; |
d9c9bef1 | 3023 | sbi->s_sb_block = sb_block; |
f613dfcb TT |
3024 | if (sb->s_bdev->bd_part) |
3025 | sbi->s_sectors_written_start = | |
3026 | part_stat_read(sb->s_bdev->bd_part, sectors[1]); | |
ac27a0ec | 3027 | |
9f6200bb TT |
3028 | /* Cleanup superblock name */ |
3029 | for (cp = sb->s_id; (cp = strchr(cp, '/'));) | |
3030 | *cp = '!'; | |
3031 | ||
dcc7dae3 | 3032 | ret = -EINVAL; |
617ba13b | 3033 | blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); |
ac27a0ec | 3034 | if (!blocksize) { |
b31e1552 | 3035 | ext4_msg(sb, KERN_ERR, "unable to set blocksize"); |
ac27a0ec DK |
3036 | goto out_fail; |
3037 | } | |
3038 | ||
3039 | /* | |
617ba13b | 3040 | * The ext4 superblock will not be buffer aligned for other than 1kB |
ac27a0ec DK |
3041 | * block sizes. We need to calculate the offset from buffer start. |
3042 | */ | |
617ba13b | 3043 | if (blocksize != EXT4_MIN_BLOCK_SIZE) { |
70bbb3e0 AM |
3044 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3045 | offset = do_div(logical_sb_block, blocksize); | |
ac27a0ec | 3046 | } else { |
70bbb3e0 | 3047 | logical_sb_block = sb_block; |
ac27a0ec DK |
3048 | } |
3049 | ||
70bbb3e0 | 3050 | if (!(bh = sb_bread(sb, logical_sb_block))) { |
b31e1552 | 3051 | ext4_msg(sb, KERN_ERR, "unable to read superblock"); |
ac27a0ec DK |
3052 | goto out_fail; |
3053 | } | |
3054 | /* | |
3055 | * Note: s_es must be initialized as soon as possible because | |
617ba13b | 3056 | * some ext4 macro-instructions depend on its value |
ac27a0ec | 3057 | */ |
617ba13b | 3058 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
ac27a0ec DK |
3059 | sbi->s_es = es; |
3060 | sb->s_magic = le16_to_cpu(es->s_magic); | |
617ba13b MC |
3061 | if (sb->s_magic != EXT4_SUPER_MAGIC) |
3062 | goto cantfind_ext4; | |
afc32f7e | 3063 | sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); |
ac27a0ec DK |
3064 | |
3065 | /* Set defaults before we parse the mount options */ | |
3066 | def_mount_opts = le32_to_cpu(es->s_default_mount_opts); | |
bfff6873 | 3067 | set_opt(sbi->s_mount_opt, INIT_INODE_TABLE); |
617ba13b | 3068 | if (def_mount_opts & EXT4_DEFM_DEBUG) |
ac27a0ec | 3069 | set_opt(sbi->s_mount_opt, DEBUG); |
437ca0fd DM |
3070 | if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { |
3071 | ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", | |
3072 | "2.6.38"); | |
ac27a0ec | 3073 | set_opt(sbi->s_mount_opt, GRPID); |
437ca0fd | 3074 | } |
617ba13b | 3075 | if (def_mount_opts & EXT4_DEFM_UID16) |
ac27a0ec | 3076 | set_opt(sbi->s_mount_opt, NO_UID32); |
03010a33 | 3077 | #ifdef CONFIG_EXT4_FS_XATTR |
617ba13b | 3078 | if (def_mount_opts & EXT4_DEFM_XATTR_USER) |
ac27a0ec | 3079 | set_opt(sbi->s_mount_opt, XATTR_USER); |
2e7842b8 | 3080 | #endif |
03010a33 | 3081 | #ifdef CONFIG_EXT4_FS_POSIX_ACL |
617ba13b | 3082 | if (def_mount_opts & EXT4_DEFM_ACL) |
ac27a0ec | 3083 | set_opt(sbi->s_mount_opt, POSIX_ACL); |
2e7842b8 | 3084 | #endif |
617ba13b | 3085 | if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) |
482a7425 | 3086 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); |
617ba13b | 3087 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) |
482a7425 | 3088 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
617ba13b | 3089 | else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) |
482a7425 | 3090 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); |
617ba13b MC |
3091 | |
3092 | if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) | |
ac27a0ec | 3093 | set_opt(sbi->s_mount_opt, ERRORS_PANIC); |
bb4f397a | 3094 | else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) |
ceea16bf | 3095 | set_opt(sbi->s_mount_opt, ERRORS_CONT); |
bb4f397a AK |
3096 | else |
3097 | set_opt(sbi->s_mount_opt, ERRORS_RO); | |
8b67f04a TT |
3098 | if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) |
3099 | set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); | |
3100 | if (def_mount_opts & EXT4_DEFM_DISCARD) | |
3101 | set_opt(sbi->s_mount_opt, DISCARD); | |
ac27a0ec DK |
3102 | |
3103 | sbi->s_resuid = le16_to_cpu(es->s_def_resuid); | |
3104 | sbi->s_resgid = le16_to_cpu(es->s_def_resgid); | |
30773840 TT |
3105 | sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; |
3106 | sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; | |
3107 | sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; | |
ac27a0ec | 3108 | |
8b67f04a TT |
3109 | if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) |
3110 | set_opt(sbi->s_mount_opt, BARRIER); | |
ac27a0ec | 3111 | |
dd919b98 AK |
3112 | /* |
3113 | * enable delayed allocation by default | |
3114 | * Use -o nodelalloc to turn it off | |
3115 | */ | |
8b67f04a TT |
3116 | if (!IS_EXT3_SB(sb) && |
3117 | ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) | |
ba69f9ab | 3118 | set_opt(sbi->s_mount_opt, DELALLOC); |
dd919b98 | 3119 | |
8b67f04a TT |
3120 | if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, |
3121 | &journal_devnum, &journal_ioprio, NULL, 0)) { | |
3122 | ext4_msg(sb, KERN_WARNING, | |
3123 | "failed to parse options in superblock: %s", | |
3124 | sbi->s_es->s_mount_opts); | |
3125 | } | |
b3881f74 TT |
3126 | if (!parse_options((char *) data, sb, &journal_devnum, |
3127 | &journal_ioprio, NULL, 0)) | |
ac27a0ec DK |
3128 | goto failed_mount; |
3129 | ||
3130 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 3131 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec | 3132 | |
617ba13b MC |
3133 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && |
3134 | (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || | |
3135 | EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || | |
3136 | EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) | |
b31e1552 ES |
3137 | ext4_msg(sb, KERN_WARNING, |
3138 | "feature flags set on rev 0 fs, " | |
3139 | "running e2fsck is recommended"); | |
469108ff | 3140 | |
ac27a0ec DK |
3141 | /* |
3142 | * Check feature flags regardless of the revision level, since we | |
3143 | * previously didn't change the revision level when setting the flags, | |
3144 | * so there is a chance incompat flags are set on a rev 0 filesystem. | |
3145 | */ | |
a13fb1a4 | 3146 | if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) |
ac27a0ec | 3147 | goto failed_mount; |
a13fb1a4 | 3148 | |
ac27a0ec DK |
3149 | blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); |
3150 | ||
617ba13b MC |
3151 | if (blocksize < EXT4_MIN_BLOCK_SIZE || |
3152 | blocksize > EXT4_MAX_BLOCK_SIZE) { | |
b31e1552 ES |
3153 | ext4_msg(sb, KERN_ERR, |
3154 | "Unsupported filesystem blocksize %d", blocksize); | |
ac27a0ec DK |
3155 | goto failed_mount; |
3156 | } | |
3157 | ||
ac27a0ec | 3158 | if (sb->s_blocksize != blocksize) { |
ce40733c AK |
3159 | /* Validate the filesystem blocksize */ |
3160 | if (!sb_set_blocksize(sb, blocksize)) { | |
b31e1552 | 3161 | ext4_msg(sb, KERN_ERR, "bad block size %d", |
ce40733c | 3162 | blocksize); |
ac27a0ec DK |
3163 | goto failed_mount; |
3164 | } | |
3165 | ||
2b2d6d01 | 3166 | brelse(bh); |
70bbb3e0 AM |
3167 | logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; |
3168 | offset = do_div(logical_sb_block, blocksize); | |
3169 | bh = sb_bread(sb, logical_sb_block); | |
ac27a0ec | 3170 | if (!bh) { |
b31e1552 ES |
3171 | ext4_msg(sb, KERN_ERR, |
3172 | "Can't read superblock on 2nd try"); | |
ac27a0ec DK |
3173 | goto failed_mount; |
3174 | } | |
617ba13b | 3175 | es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); |
ac27a0ec | 3176 | sbi->s_es = es; |
617ba13b | 3177 | if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { |
b31e1552 ES |
3178 | ext4_msg(sb, KERN_ERR, |
3179 | "Magic mismatch, very weird!"); | |
ac27a0ec DK |
3180 | goto failed_mount; |
3181 | } | |
3182 | } | |
3183 | ||
a13fb1a4 ES |
3184 | has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, |
3185 | EXT4_FEATURE_RO_COMPAT_HUGE_FILE); | |
f287a1a5 TT |
3186 | sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, |
3187 | has_huge_files); | |
3188 | sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); | |
ac27a0ec | 3189 | |
617ba13b MC |
3190 | if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { |
3191 | sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; | |
3192 | sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; | |
ac27a0ec DK |
3193 | } else { |
3194 | sbi->s_inode_size = le16_to_cpu(es->s_inode_size); | |
3195 | sbi->s_first_ino = le32_to_cpu(es->s_first_ino); | |
617ba13b | 3196 | if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || |
1330593e | 3197 | (!is_power_of_2(sbi->s_inode_size)) || |
ac27a0ec | 3198 | (sbi->s_inode_size > blocksize)) { |
b31e1552 ES |
3199 | ext4_msg(sb, KERN_ERR, |
3200 | "unsupported inode size: %d", | |
2b2d6d01 | 3201 | sbi->s_inode_size); |
ac27a0ec DK |
3202 | goto failed_mount; |
3203 | } | |
ef7f3835 KS |
3204 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) |
3205 | sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); | |
ac27a0ec | 3206 | } |
0b8e58a1 | 3207 | |
0d1ee42f AR |
3208 | sbi->s_desc_size = le16_to_cpu(es->s_desc_size); |
3209 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { | |
8fadc143 | 3210 | if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || |
0d1ee42f | 3211 | sbi->s_desc_size > EXT4_MAX_DESC_SIZE || |
d8ea6cf8 | 3212 | !is_power_of_2(sbi->s_desc_size)) { |
b31e1552 ES |
3213 | ext4_msg(sb, KERN_ERR, |
3214 | "unsupported descriptor size %lu", | |
0d1ee42f AR |
3215 | sbi->s_desc_size); |
3216 | goto failed_mount; | |
3217 | } | |
3218 | } else | |
3219 | sbi->s_desc_size = EXT4_MIN_DESC_SIZE; | |
0b8e58a1 | 3220 | |
ac27a0ec | 3221 | sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); |
ac27a0ec | 3222 | sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); |
b47b6f38 | 3223 | if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) |
617ba13b | 3224 | goto cantfind_ext4; |
0b8e58a1 | 3225 | |
617ba13b | 3226 | sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); |
ac27a0ec | 3227 | if (sbi->s_inodes_per_block == 0) |
617ba13b | 3228 | goto cantfind_ext4; |
ac27a0ec DK |
3229 | sbi->s_itb_per_group = sbi->s_inodes_per_group / |
3230 | sbi->s_inodes_per_block; | |
0d1ee42f | 3231 | sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); |
ac27a0ec DK |
3232 | sbi->s_sbh = bh; |
3233 | sbi->s_mount_state = le16_to_cpu(es->s_state); | |
e57aa839 FW |
3234 | sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); |
3235 | sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); | |
0b8e58a1 | 3236 | |
2b2d6d01 | 3237 | for (i = 0; i < 4; i++) |
ac27a0ec DK |
3238 | sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); |
3239 | sbi->s_def_hash_version = es->s_def_hash_version; | |
f99b2589 TT |
3240 | i = le32_to_cpu(es->s_flags); |
3241 | if (i & EXT2_FLAGS_UNSIGNED_HASH) | |
3242 | sbi->s_hash_unsigned = 3; | |
3243 | else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { | |
3244 | #ifdef __CHAR_UNSIGNED__ | |
3245 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); | |
3246 | sbi->s_hash_unsigned = 3; | |
3247 | #else | |
3248 | es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); | |
3249 | #endif | |
3250 | sb->s_dirt = 1; | |
3251 | } | |
ac27a0ec DK |
3252 | |
3253 | if (sbi->s_blocks_per_group > blocksize * 8) { | |
b31e1552 ES |
3254 | ext4_msg(sb, KERN_ERR, |
3255 | "#blocks per group too big: %lu", | |
2b2d6d01 | 3256 | sbi->s_blocks_per_group); |
ac27a0ec DK |
3257 | goto failed_mount; |
3258 | } | |
ac27a0ec | 3259 | if (sbi->s_inodes_per_group > blocksize * 8) { |
b31e1552 ES |
3260 | ext4_msg(sb, KERN_ERR, |
3261 | "#inodes per group too big: %lu", | |
2b2d6d01 | 3262 | sbi->s_inodes_per_group); |
ac27a0ec DK |
3263 | goto failed_mount; |
3264 | } | |
3265 | ||
bf43d84b ES |
3266 | /* |
3267 | * Test whether we have more sectors than will fit in sector_t, | |
3268 | * and whether the max offset is addressable by the page cache. | |
3269 | */ | |
30ca22c7 PL |
3270 | ret = generic_check_addressable(sb->s_blocksize_bits, |
3271 | ext4_blocks_count(es)); | |
3272 | if (ret) { | |
b31e1552 | 3273 | ext4_msg(sb, KERN_ERR, "filesystem" |
bf43d84b | 3274 | " too large to mount safely on this system"); |
ac27a0ec | 3275 | if (sizeof(sector_t) < 8) |
90c699a9 | 3276 | ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); |
ac27a0ec DK |
3277 | goto failed_mount; |
3278 | } | |
3279 | ||
617ba13b MC |
3280 | if (EXT4_BLOCKS_PER_GROUP(sb) == 0) |
3281 | goto cantfind_ext4; | |
e7c95593 | 3282 | |
0f2ddca6 FTN |
3283 | /* check blocks count against device size */ |
3284 | blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; | |
3285 | if (blocks_count && ext4_blocks_count(es) > blocks_count) { | |
b31e1552 ES |
3286 | ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " |
3287 | "exceeds size of device (%llu blocks)", | |
0f2ddca6 FTN |
3288 | ext4_blocks_count(es), blocks_count); |
3289 | goto failed_mount; | |
3290 | } | |
3291 | ||
0b8e58a1 AD |
3292 | /* |
3293 | * It makes no sense for the first data block to be beyond the end | |
3294 | * of the filesystem. | |
3295 | */ | |
3296 | if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { | |
b31e1552 ES |
3297 | ext4_msg(sb, KERN_WARNING, "bad geometry: first data" |
3298 | "block %u is beyond end of filesystem (%llu)", | |
3299 | le32_to_cpu(es->s_first_data_block), | |
3300 | ext4_blocks_count(es)); | |
e7c95593 ES |
3301 | goto failed_mount; |
3302 | } | |
bd81d8ee LV |
3303 | blocks_count = (ext4_blocks_count(es) - |
3304 | le32_to_cpu(es->s_first_data_block) + | |
3305 | EXT4_BLOCKS_PER_GROUP(sb) - 1); | |
3306 | do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); | |
4ec11028 | 3307 | if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { |
b31e1552 | 3308 | ext4_msg(sb, KERN_WARNING, "groups count too large: %u " |
4ec11028 | 3309 | "(block count %llu, first data block %u, " |
b31e1552 | 3310 | "blocks per group %lu)", sbi->s_groups_count, |
4ec11028 TT |
3311 | ext4_blocks_count(es), |
3312 | le32_to_cpu(es->s_first_data_block), | |
3313 | EXT4_BLOCKS_PER_GROUP(sb)); | |
3314 | goto failed_mount; | |
3315 | } | |
bd81d8ee | 3316 | sbi->s_groups_count = blocks_count; |
fb0a387d ES |
3317 | sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, |
3318 | (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); | |
617ba13b MC |
3319 | db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / |
3320 | EXT4_DESC_PER_BLOCK(sb); | |
2b2d6d01 | 3321 | sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), |
ac27a0ec DK |
3322 | GFP_KERNEL); |
3323 | if (sbi->s_group_desc == NULL) { | |
b31e1552 | 3324 | ext4_msg(sb, KERN_ERR, "not enough memory"); |
ac27a0ec DK |
3325 | goto failed_mount; |
3326 | } | |
3327 | ||
3244fcb1 | 3328 | #ifdef CONFIG_PROC_FS |
9f6200bb TT |
3329 | if (ext4_proc_root) |
3330 | sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); | |
3244fcb1 | 3331 | #endif |
240799cd | 3332 | |
705895b6 | 3333 | bgl_lock_init(sbi->s_blockgroup_lock); |
ac27a0ec DK |
3334 | |
3335 | for (i = 0; i < db_count; i++) { | |
70bbb3e0 | 3336 | block = descriptor_loc(sb, logical_sb_block, i); |
ac27a0ec DK |
3337 | sbi->s_group_desc[i] = sb_bread(sb, block); |
3338 | if (!sbi->s_group_desc[i]) { | |
b31e1552 ES |
3339 | ext4_msg(sb, KERN_ERR, |
3340 | "can't read group descriptor %d", i); | |
ac27a0ec DK |
3341 | db_count = i; |
3342 | goto failed_mount2; | |
3343 | } | |
3344 | } | |
bfff6873 | 3345 | if (!ext4_check_descriptors(sb, &first_not_zeroed)) { |
b31e1552 | 3346 | ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); |
ac27a0ec DK |
3347 | goto failed_mount2; |
3348 | } | |
772cb7c8 JS |
3349 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) |
3350 | if (!ext4_fill_flex_info(sb)) { | |
b31e1552 ES |
3351 | ext4_msg(sb, KERN_ERR, |
3352 | "unable to initialize " | |
3353 | "flex_bg meta info!"); | |
772cb7c8 JS |
3354 | goto failed_mount2; |
3355 | } | |
3356 | ||
ac27a0ec DK |
3357 | sbi->s_gdb_count = db_count; |
3358 | get_random_bytes(&sbi->s_next_generation, sizeof(u32)); | |
3359 | spin_lock_init(&sbi->s_next_gen_lock); | |
3360 | ||
ce7e010a TT |
3361 | err = percpu_counter_init(&sbi->s_freeblocks_counter, |
3362 | ext4_count_free_blocks(sb)); | |
3363 | if (!err) { | |
3364 | err = percpu_counter_init(&sbi->s_freeinodes_counter, | |
3365 | ext4_count_free_inodes(sb)); | |
3366 | } | |
3367 | if (!err) { | |
3368 | err = percpu_counter_init(&sbi->s_dirs_counter, | |
3369 | ext4_count_dirs(sb)); | |
3370 | } | |
3371 | if (!err) { | |
3372 | err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); | |
3373 | } | |
3374 | if (err) { | |
3375 | ext4_msg(sb, KERN_ERR, "insufficient memory"); | |
3376 | goto failed_mount3; | |
3377 | } | |
3378 | ||
c9de560d | 3379 | sbi->s_stripe = ext4_get_stripe_size(sbi); |
55138e0b | 3380 | sbi->s_max_writeback_mb_bump = 128; |
c9de560d | 3381 | |
ac27a0ec DK |
3382 | /* |
3383 | * set up enough so that it can read an inode | |
3384 | */ | |
9ca92389 TT |
3385 | if (!test_opt(sb, NOLOAD) && |
3386 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) | |
3387 | sb->s_op = &ext4_sops; | |
3388 | else | |
3389 | sb->s_op = &ext4_nojournal_sops; | |
617ba13b MC |
3390 | sb->s_export_op = &ext4_export_ops; |
3391 | sb->s_xattr = ext4_xattr_handlers; | |
ac27a0ec | 3392 | #ifdef CONFIG_QUOTA |
617ba13b MC |
3393 | sb->s_qcop = &ext4_qctl_operations; |
3394 | sb->dq_op = &ext4_quota_operations; | |
ac27a0ec DK |
3395 | #endif |
3396 | INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ | |
3b9d4ed2 | 3397 | mutex_init(&sbi->s_orphan_lock); |
32ed5058 | 3398 | mutex_init(&sbi->s_resize_lock); |
ac27a0ec DK |
3399 | |
3400 | sb->s_root = NULL; | |
3401 | ||
3402 | needs_recovery = (es->s_last_orphan != 0 || | |
617ba13b MC |
3403 | EXT4_HAS_INCOMPAT_FEATURE(sb, |
3404 | EXT4_FEATURE_INCOMPAT_RECOVER)); | |
ac27a0ec DK |
3405 | |
3406 | /* | |
3407 | * The first inode we look at is the journal inode. Don't try | |
3408 | * root first: it may be modified in the journal! | |
3409 | */ | |
3410 | if (!test_opt(sb, NOLOAD) && | |
617ba13b MC |
3411 | EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
3412 | if (ext4_load_journal(sb, es, journal_devnum)) | |
ac27a0ec | 3413 | goto failed_mount3; |
0390131b FM |
3414 | } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && |
3415 | EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { | |
b31e1552 ES |
3416 | ext4_msg(sb, KERN_ERR, "required journal recovery " |
3417 | "suppressed and not mounted read-only"); | |
744692dc | 3418 | goto failed_mount_wq; |
ac27a0ec | 3419 | } else { |
0390131b FM |
3420 | clear_opt(sbi->s_mount_opt, DATA_FLAGS); |
3421 | set_opt(sbi->s_mount_opt, WRITEBACK_DATA); | |
3422 | sbi->s_journal = NULL; | |
3423 | needs_recovery = 0; | |
3424 | goto no_journal; | |
ac27a0ec DK |
3425 | } |
3426 | ||
eb40a09c JS |
3427 | if (ext4_blocks_count(es) > 0xffffffffULL && |
3428 | !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, | |
3429 | JBD2_FEATURE_INCOMPAT_64BIT)) { | |
b31e1552 | 3430 | ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); |
744692dc | 3431 | goto failed_mount_wq; |
eb40a09c JS |
3432 | } |
3433 | ||
d4da6c9c LT |
3434 | if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { |
3435 | jbd2_journal_set_features(sbi->s_journal, | |
3436 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
818d276c | 3437 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); |
d4da6c9c LT |
3438 | } else if (test_opt(sb, JOURNAL_CHECKSUM)) { |
3439 | jbd2_journal_set_features(sbi->s_journal, | |
3440 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); | |
818d276c GS |
3441 | jbd2_journal_clear_features(sbi->s_journal, 0, 0, |
3442 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
d4da6c9c LT |
3443 | } else { |
3444 | jbd2_journal_clear_features(sbi->s_journal, | |
3445 | JBD2_FEATURE_COMPAT_CHECKSUM, 0, | |
3446 | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); | |
3447 | } | |
818d276c | 3448 | |
ac27a0ec DK |
3449 | /* We have now updated the journal if required, so we can |
3450 | * validate the data journaling mode. */ | |
3451 | switch (test_opt(sb, DATA_FLAGS)) { | |
3452 | case 0: | |
3453 | /* No mode set, assume a default based on the journal | |
63f57933 AM |
3454 | * capabilities: ORDERED_DATA if the journal can |
3455 | * cope, else JOURNAL_DATA | |
3456 | */ | |
dab291af MC |
3457 | if (jbd2_journal_check_available_features |
3458 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) | |
ac27a0ec DK |
3459 | set_opt(sbi->s_mount_opt, ORDERED_DATA); |
3460 | else | |
3461 | set_opt(sbi->s_mount_opt, JOURNAL_DATA); | |
3462 | break; | |
3463 | ||
617ba13b MC |
3464 | case EXT4_MOUNT_ORDERED_DATA: |
3465 | case EXT4_MOUNT_WRITEBACK_DATA: | |
dab291af MC |
3466 | if (!jbd2_journal_check_available_features |
3467 | (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { | |
b31e1552 ES |
3468 | ext4_msg(sb, KERN_ERR, "Journal does not support " |
3469 | "requested data journaling mode"); | |
744692dc | 3470 | goto failed_mount_wq; |
ac27a0ec DK |
3471 | } |
3472 | default: | |
3473 | break; | |
3474 | } | |
b3881f74 | 3475 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
ac27a0ec | 3476 | |
ce7e010a TT |
3477 | /* |
3478 | * The journal may have updated the bg summary counts, so we | |
3479 | * need to update the global counters. | |
3480 | */ | |
3481 | percpu_counter_set(&sbi->s_freeblocks_counter, | |
3482 | ext4_count_free_blocks(sb)); | |
3483 | percpu_counter_set(&sbi->s_freeinodes_counter, | |
3484 | ext4_count_free_inodes(sb)); | |
3485 | percpu_counter_set(&sbi->s_dirs_counter, | |
3486 | ext4_count_dirs(sb)); | |
3487 | percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); | |
206f7ab4 | 3488 | |
ce7e010a | 3489 | no_journal: |
4c0425ff MC |
3490 | EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten"); |
3491 | if (!EXT4_SB(sb)->dio_unwritten_wq) { | |
3492 | printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); | |
3493 | goto failed_mount_wq; | |
3494 | } | |
3495 | ||
ac27a0ec | 3496 | /* |
dab291af | 3497 | * The jbd2_journal_load will have done any necessary log recovery, |
ac27a0ec DK |
3498 | * so we can safely mount the rest of the filesystem now. |
3499 | */ | |
3500 | ||
1d1fe1ee DH |
3501 | root = ext4_iget(sb, EXT4_ROOT_INO); |
3502 | if (IS_ERR(root)) { | |
b31e1552 | 3503 | ext4_msg(sb, KERN_ERR, "get root inode failed"); |
1d1fe1ee | 3504 | ret = PTR_ERR(root); |
ac27a0ec DK |
3505 | goto failed_mount4; |
3506 | } | |
3507 | if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { | |
1d1fe1ee | 3508 | iput(root); |
b31e1552 | 3509 | ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); |
ac27a0ec DK |
3510 | goto failed_mount4; |
3511 | } | |
1d1fe1ee DH |
3512 | sb->s_root = d_alloc_root(root); |
3513 | if (!sb->s_root) { | |
b31e1552 | 3514 | ext4_msg(sb, KERN_ERR, "get root dentry failed"); |
1d1fe1ee DH |
3515 | iput(root); |
3516 | ret = -ENOMEM; | |
3517 | goto failed_mount4; | |
3518 | } | |
ac27a0ec | 3519 | |
2b2d6d01 | 3520 | ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); |
ef7f3835 KS |
3521 | |
3522 | /* determine the minimum size of new large inodes, if present */ | |
3523 | if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { | |
3524 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3525 | EXT4_GOOD_OLD_INODE_SIZE; | |
3526 | if (EXT4_HAS_RO_COMPAT_FEATURE(sb, | |
3527 | EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { | |
3528 | if (sbi->s_want_extra_isize < | |
3529 | le16_to_cpu(es->s_want_extra_isize)) | |
3530 | sbi->s_want_extra_isize = | |
3531 | le16_to_cpu(es->s_want_extra_isize); | |
3532 | if (sbi->s_want_extra_isize < | |
3533 | le16_to_cpu(es->s_min_extra_isize)) | |
3534 | sbi->s_want_extra_isize = | |
3535 | le16_to_cpu(es->s_min_extra_isize); | |
3536 | } | |
3537 | } | |
3538 | /* Check if enough inode space is available */ | |
3539 | if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > | |
3540 | sbi->s_inode_size) { | |
3541 | sbi->s_want_extra_isize = sizeof(struct ext4_inode) - | |
3542 | EXT4_GOOD_OLD_INODE_SIZE; | |
b31e1552 ES |
3543 | ext4_msg(sb, KERN_INFO, "required extra inode space not" |
3544 | "available"); | |
ef7f3835 KS |
3545 | } |
3546 | ||
90576c0b TT |
3547 | if (test_opt(sb, DELALLOC) && |
3548 | (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { | |
b31e1552 ES |
3549 | ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " |
3550 | "requested data journaling mode"); | |
c2774d84 | 3551 | clear_opt(sbi->s_mount_opt, DELALLOC); |
90576c0b | 3552 | } |
744692dc JZ |
3553 | if (test_opt(sb, DIOREAD_NOLOCK)) { |
3554 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { | |
3555 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3556 | "option - requested data journaling mode"); | |
3557 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
3558 | } | |
3559 | if (sb->s_blocksize < PAGE_SIZE) { | |
3560 | ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " | |
3561 | "option - block size is too small"); | |
3562 | clear_opt(sbi->s_mount_opt, DIOREAD_NOLOCK); | |
3563 | } | |
3564 | } | |
c2774d84 | 3565 | |
6fd058f7 TT |
3566 | err = ext4_setup_system_zone(sb); |
3567 | if (err) { | |
b31e1552 | 3568 | ext4_msg(sb, KERN_ERR, "failed to initialize system " |
fbe845dd | 3569 | "zone (%d)", err); |
6fd058f7 TT |
3570 | goto failed_mount4; |
3571 | } | |
3572 | ||
c2774d84 AK |
3573 | ext4_ext_init(sb); |
3574 | err = ext4_mb_init(sb, needs_recovery); | |
3575 | if (err) { | |
421f91d2 | 3576 | ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", |
b31e1552 | 3577 | err); |
c2774d84 AK |
3578 | goto failed_mount4; |
3579 | } | |
3580 | ||
bfff6873 LC |
3581 | err = ext4_register_li_request(sb, first_not_zeroed); |
3582 | if (err) | |
3583 | goto failed_mount4; | |
3584 | ||
3197ebdb TT |
3585 | sbi->s_kobj.kset = ext4_kset; |
3586 | init_completion(&sbi->s_kobj_unregister); | |
3587 | err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, | |
3588 | "%s", sb->s_id); | |
3589 | if (err) { | |
3590 | ext4_mb_release(sb); | |
3591 | ext4_ext_release(sb); | |
3592 | goto failed_mount4; | |
3593 | }; | |
3594 | ||
617ba13b MC |
3595 | EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; |
3596 | ext4_orphan_cleanup(sb, es); | |
3597 | EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; | |
0390131b | 3598 | if (needs_recovery) { |
b31e1552 | 3599 | ext4_msg(sb, KERN_INFO, "recovery complete"); |
0390131b FM |
3600 | ext4_mark_recovery_complete(sb, es); |
3601 | } | |
3602 | if (EXT4_SB(sb)->s_journal) { | |
3603 | if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) | |
3604 | descr = " journalled data mode"; | |
3605 | else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) | |
3606 | descr = " ordered data mode"; | |
3607 | else | |
3608 | descr = " writeback data mode"; | |
3609 | } else | |
3610 | descr = "out journal"; | |
3611 | ||
d4c402d9 | 3612 | ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " |
8b67f04a TT |
3613 | "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, |
3614 | *sbi->s_es->s_mount_opts ? "; " : "", orig_data); | |
ac27a0ec | 3615 | |
66e61a9e TT |
3616 | init_timer(&sbi->s_err_report); |
3617 | sbi->s_err_report.function = print_daily_error_info; | |
3618 | sbi->s_err_report.data = (unsigned long) sb; | |
3619 | if (es->s_error_count) | |
3620 | mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ | |
ac27a0ec | 3621 | |
d4c402d9 | 3622 | kfree(orig_data); |
ac27a0ec DK |
3623 | return 0; |
3624 | ||
617ba13b | 3625 | cantfind_ext4: |
ac27a0ec | 3626 | if (!silent) |
b31e1552 | 3627 | ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); |
ac27a0ec DK |
3628 | goto failed_mount; |
3629 | ||
3630 | failed_mount4: | |
b31e1552 | 3631 | ext4_msg(sb, KERN_ERR, "mount failed"); |
4c0425ff MC |
3632 | destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); |
3633 | failed_mount_wq: | |
6fd058f7 | 3634 | ext4_release_system_zone(sb); |
0390131b FM |
3635 | if (sbi->s_journal) { |
3636 | jbd2_journal_destroy(sbi->s_journal); | |
3637 | sbi->s_journal = NULL; | |
3638 | } | |
ac27a0ec | 3639 | failed_mount3: |
c5ca7c76 TT |
3640 | if (sbi->s_flex_groups) { |
3641 | if (is_vmalloc_addr(sbi->s_flex_groups)) | |
3642 | vfree(sbi->s_flex_groups); | |
3643 | else | |
3644 | kfree(sbi->s_flex_groups); | |
3645 | } | |
ce7e010a TT |
3646 | percpu_counter_destroy(&sbi->s_freeblocks_counter); |
3647 | percpu_counter_destroy(&sbi->s_freeinodes_counter); | |
3648 | percpu_counter_destroy(&sbi->s_dirs_counter); | |
3649 | percpu_counter_destroy(&sbi->s_dirtyblocks_counter); | |
ac27a0ec DK |
3650 | failed_mount2: |
3651 | for (i = 0; i < db_count; i++) | |
3652 | brelse(sbi->s_group_desc[i]); | |
3653 | kfree(sbi->s_group_desc); | |
3654 | failed_mount: | |
240799cd | 3655 | if (sbi->s_proc) { |
9f6200bb | 3656 | remove_proc_entry(sb->s_id, ext4_proc_root); |
240799cd | 3657 | } |
ac27a0ec DK |
3658 | #ifdef CONFIG_QUOTA |
3659 | for (i = 0; i < MAXQUOTAS; i++) | |
3660 | kfree(sbi->s_qf_names[i]); | |
3661 | #endif | |
617ba13b | 3662 | ext4_blkdev_remove(sbi); |
ac27a0ec DK |
3663 | brelse(bh); |
3664 | out_fail: | |
3665 | sb->s_fs_info = NULL; | |
f6830165 | 3666 | kfree(sbi->s_blockgroup_lock); |
ac27a0ec | 3667 | kfree(sbi); |
dcc7dae3 | 3668 | out_free_orig: |
d4c402d9 | 3669 | kfree(orig_data); |
1d1fe1ee | 3670 | return ret; |
ac27a0ec DK |
3671 | } |
3672 | ||
3673 | /* | |
3674 | * Setup any per-fs journal parameters now. We'll do this both on | |
3675 | * initial mount, once the journal has been initialised but before we've | |
3676 | * done any recovery; and again on any subsequent remount. | |
3677 | */ | |
617ba13b | 3678 | static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) |
ac27a0ec | 3679 | { |
617ba13b | 3680 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 3681 | |
30773840 TT |
3682 | journal->j_commit_interval = sbi->s_commit_interval; |
3683 | journal->j_min_batch_time = sbi->s_min_batch_time; | |
3684 | journal->j_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec | 3685 | |
a931da6a | 3686 | write_lock(&journal->j_state_lock); |
ac27a0ec | 3687 | if (test_opt(sb, BARRIER)) |
dab291af | 3688 | journal->j_flags |= JBD2_BARRIER; |
ac27a0ec | 3689 | else |
dab291af | 3690 | journal->j_flags &= ~JBD2_BARRIER; |
5bf5683a HK |
3691 | if (test_opt(sb, DATA_ERR_ABORT)) |
3692 | journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; | |
3693 | else | |
3694 | journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; | |
a931da6a | 3695 | write_unlock(&journal->j_state_lock); |
ac27a0ec DK |
3696 | } |
3697 | ||
617ba13b | 3698 | static journal_t *ext4_get_journal(struct super_block *sb, |
ac27a0ec DK |
3699 | unsigned int journal_inum) |
3700 | { | |
3701 | struct inode *journal_inode; | |
3702 | journal_t *journal; | |
3703 | ||
0390131b FM |
3704 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3705 | ||
ac27a0ec DK |
3706 | /* First, test for the existence of a valid inode on disk. Bad |
3707 | * things happen if we iget() an unused inode, as the subsequent | |
3708 | * iput() will try to delete it. */ | |
3709 | ||
1d1fe1ee DH |
3710 | journal_inode = ext4_iget(sb, journal_inum); |
3711 | if (IS_ERR(journal_inode)) { | |
b31e1552 | 3712 | ext4_msg(sb, KERN_ERR, "no journal found"); |
ac27a0ec DK |
3713 | return NULL; |
3714 | } | |
3715 | if (!journal_inode->i_nlink) { | |
3716 | make_bad_inode(journal_inode); | |
3717 | iput(journal_inode); | |
b31e1552 | 3718 | ext4_msg(sb, KERN_ERR, "journal inode is deleted"); |
ac27a0ec DK |
3719 | return NULL; |
3720 | } | |
3721 | ||
e5f8eab8 | 3722 | jbd_debug(2, "Journal inode found at %p: %lld bytes\n", |
ac27a0ec | 3723 | journal_inode, journal_inode->i_size); |
1d1fe1ee | 3724 | if (!S_ISREG(journal_inode->i_mode)) { |
b31e1552 | 3725 | ext4_msg(sb, KERN_ERR, "invalid journal inode"); |
ac27a0ec DK |
3726 | iput(journal_inode); |
3727 | return NULL; | |
3728 | } | |
3729 | ||
dab291af | 3730 | journal = jbd2_journal_init_inode(journal_inode); |
ac27a0ec | 3731 | if (!journal) { |
b31e1552 | 3732 | ext4_msg(sb, KERN_ERR, "Could not load journal inode"); |
ac27a0ec DK |
3733 | iput(journal_inode); |
3734 | return NULL; | |
3735 | } | |
3736 | journal->j_private = sb; | |
617ba13b | 3737 | ext4_init_journal_params(sb, journal); |
ac27a0ec DK |
3738 | return journal; |
3739 | } | |
3740 | ||
617ba13b | 3741 | static journal_t *ext4_get_dev_journal(struct super_block *sb, |
ac27a0ec DK |
3742 | dev_t j_dev) |
3743 | { | |
2b2d6d01 | 3744 | struct buffer_head *bh; |
ac27a0ec | 3745 | journal_t *journal; |
617ba13b MC |
3746 | ext4_fsblk_t start; |
3747 | ext4_fsblk_t len; | |
ac27a0ec | 3748 | int hblock, blocksize; |
617ba13b | 3749 | ext4_fsblk_t sb_block; |
ac27a0ec | 3750 | unsigned long offset; |
2b2d6d01 | 3751 | struct ext4_super_block *es; |
ac27a0ec DK |
3752 | struct block_device *bdev; |
3753 | ||
0390131b FM |
3754 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3755 | ||
b31e1552 | 3756 | bdev = ext4_blkdev_get(j_dev, sb); |
ac27a0ec DK |
3757 | if (bdev == NULL) |
3758 | return NULL; | |
3759 | ||
ac27a0ec | 3760 | blocksize = sb->s_blocksize; |
e1defc4f | 3761 | hblock = bdev_logical_block_size(bdev); |
ac27a0ec | 3762 | if (blocksize < hblock) { |
b31e1552 ES |
3763 | ext4_msg(sb, KERN_ERR, |
3764 | "blocksize too small for journal device"); | |
ac27a0ec DK |
3765 | goto out_bdev; |
3766 | } | |
3767 | ||
617ba13b MC |
3768 | sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; |
3769 | offset = EXT4_MIN_BLOCK_SIZE % blocksize; | |
ac27a0ec DK |
3770 | set_blocksize(bdev, blocksize); |
3771 | if (!(bh = __bread(bdev, sb_block, blocksize))) { | |
b31e1552 ES |
3772 | ext4_msg(sb, KERN_ERR, "couldn't read superblock of " |
3773 | "external journal"); | |
ac27a0ec DK |
3774 | goto out_bdev; |
3775 | } | |
3776 | ||
617ba13b MC |
3777 | es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); |
3778 | if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || | |
ac27a0ec | 3779 | !(le32_to_cpu(es->s_feature_incompat) & |
617ba13b | 3780 | EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { |
b31e1552 ES |
3781 | ext4_msg(sb, KERN_ERR, "external journal has " |
3782 | "bad superblock"); | |
ac27a0ec DK |
3783 | brelse(bh); |
3784 | goto out_bdev; | |
3785 | } | |
3786 | ||
617ba13b | 3787 | if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { |
b31e1552 | 3788 | ext4_msg(sb, KERN_ERR, "journal UUID does not match"); |
ac27a0ec DK |
3789 | brelse(bh); |
3790 | goto out_bdev; | |
3791 | } | |
3792 | ||
bd81d8ee | 3793 | len = ext4_blocks_count(es); |
ac27a0ec DK |
3794 | start = sb_block + 1; |
3795 | brelse(bh); /* we're done with the superblock */ | |
3796 | ||
dab291af | 3797 | journal = jbd2_journal_init_dev(bdev, sb->s_bdev, |
ac27a0ec DK |
3798 | start, len, blocksize); |
3799 | if (!journal) { | |
b31e1552 | 3800 | ext4_msg(sb, KERN_ERR, "failed to create device journal"); |
ac27a0ec DK |
3801 | goto out_bdev; |
3802 | } | |
3803 | journal->j_private = sb; | |
3804 | ll_rw_block(READ, 1, &journal->j_sb_buffer); | |
3805 | wait_on_buffer(journal->j_sb_buffer); | |
3806 | if (!buffer_uptodate(journal->j_sb_buffer)) { | |
b31e1552 | 3807 | ext4_msg(sb, KERN_ERR, "I/O error on journal device"); |
ac27a0ec DK |
3808 | goto out_journal; |
3809 | } | |
3810 | if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { | |
b31e1552 ES |
3811 | ext4_msg(sb, KERN_ERR, "External journal has more than one " |
3812 | "user (unsupported) - %d", | |
ac27a0ec DK |
3813 | be32_to_cpu(journal->j_superblock->s_nr_users)); |
3814 | goto out_journal; | |
3815 | } | |
617ba13b MC |
3816 | EXT4_SB(sb)->journal_bdev = bdev; |
3817 | ext4_init_journal_params(sb, journal); | |
ac27a0ec | 3818 | return journal; |
0b8e58a1 | 3819 | |
ac27a0ec | 3820 | out_journal: |
dab291af | 3821 | jbd2_journal_destroy(journal); |
ac27a0ec | 3822 | out_bdev: |
617ba13b | 3823 | ext4_blkdev_put(bdev); |
ac27a0ec DK |
3824 | return NULL; |
3825 | } | |
3826 | ||
617ba13b MC |
3827 | static int ext4_load_journal(struct super_block *sb, |
3828 | struct ext4_super_block *es, | |
ac27a0ec DK |
3829 | unsigned long journal_devnum) |
3830 | { | |
3831 | journal_t *journal; | |
3832 | unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); | |
3833 | dev_t journal_dev; | |
3834 | int err = 0; | |
3835 | int really_read_only; | |
3836 | ||
0390131b FM |
3837 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
3838 | ||
ac27a0ec DK |
3839 | if (journal_devnum && |
3840 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { | |
b31e1552 ES |
3841 | ext4_msg(sb, KERN_INFO, "external journal device major/minor " |
3842 | "numbers have changed"); | |
ac27a0ec DK |
3843 | journal_dev = new_decode_dev(journal_devnum); |
3844 | } else | |
3845 | journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); | |
3846 | ||
3847 | really_read_only = bdev_read_only(sb->s_bdev); | |
3848 | ||
3849 | /* | |
3850 | * Are we loading a blank journal or performing recovery after a | |
3851 | * crash? For recovery, we need to check in advance whether we | |
3852 | * can get read-write access to the device. | |
3853 | */ | |
617ba13b | 3854 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { |
ac27a0ec | 3855 | if (sb->s_flags & MS_RDONLY) { |
b31e1552 ES |
3856 | ext4_msg(sb, KERN_INFO, "INFO: recovery " |
3857 | "required on readonly filesystem"); | |
ac27a0ec | 3858 | if (really_read_only) { |
b31e1552 ES |
3859 | ext4_msg(sb, KERN_ERR, "write access " |
3860 | "unavailable, cannot proceed"); | |
ac27a0ec DK |
3861 | return -EROFS; |
3862 | } | |
b31e1552 ES |
3863 | ext4_msg(sb, KERN_INFO, "write access will " |
3864 | "be enabled during recovery"); | |
ac27a0ec DK |
3865 | } |
3866 | } | |
3867 | ||
3868 | if (journal_inum && journal_dev) { | |
b31e1552 ES |
3869 | ext4_msg(sb, KERN_ERR, "filesystem has both journal " |
3870 | "and inode journals!"); | |
ac27a0ec DK |
3871 | return -EINVAL; |
3872 | } | |
3873 | ||
3874 | if (journal_inum) { | |
617ba13b | 3875 | if (!(journal = ext4_get_journal(sb, journal_inum))) |
ac27a0ec DK |
3876 | return -EINVAL; |
3877 | } else { | |
617ba13b | 3878 | if (!(journal = ext4_get_dev_journal(sb, journal_dev))) |
ac27a0ec DK |
3879 | return -EINVAL; |
3880 | } | |
3881 | ||
90576c0b | 3882 | if (!(journal->j_flags & JBD2_BARRIER)) |
b31e1552 | 3883 | ext4_msg(sb, KERN_INFO, "barriers disabled"); |
4776004f | 3884 | |
ac27a0ec | 3885 | if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { |
dab291af | 3886 | err = jbd2_journal_update_format(journal); |
ac27a0ec | 3887 | if (err) { |
b31e1552 | 3888 | ext4_msg(sb, KERN_ERR, "error updating journal"); |
dab291af | 3889 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3890 | return err; |
3891 | } | |
3892 | } | |
3893 | ||
617ba13b | 3894 | if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) |
dab291af | 3895 | err = jbd2_journal_wipe(journal, !really_read_only); |
1c13d5c0 TT |
3896 | if (!err) { |
3897 | char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); | |
3898 | if (save) | |
3899 | memcpy(save, ((char *) es) + | |
3900 | EXT4_S_ERR_START, EXT4_S_ERR_LEN); | |
dab291af | 3901 | err = jbd2_journal_load(journal); |
1c13d5c0 TT |
3902 | if (save) |
3903 | memcpy(((char *) es) + EXT4_S_ERR_START, | |
3904 | save, EXT4_S_ERR_LEN); | |
3905 | kfree(save); | |
3906 | } | |
ac27a0ec DK |
3907 | |
3908 | if (err) { | |
b31e1552 | 3909 | ext4_msg(sb, KERN_ERR, "error loading journal"); |
dab291af | 3910 | jbd2_journal_destroy(journal); |
ac27a0ec DK |
3911 | return err; |
3912 | } | |
3913 | ||
617ba13b MC |
3914 | EXT4_SB(sb)->s_journal = journal; |
3915 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 3916 | |
c41303ce | 3917 | if (!really_read_only && journal_devnum && |
ac27a0ec DK |
3918 | journal_devnum != le32_to_cpu(es->s_journal_dev)) { |
3919 | es->s_journal_dev = cpu_to_le32(journal_devnum); | |
ac27a0ec DK |
3920 | |
3921 | /* Make sure we flush the recovery flag to disk. */ | |
e2d67052 | 3922 | ext4_commit_super(sb, 1); |
ac27a0ec DK |
3923 | } |
3924 | ||
3925 | return 0; | |
3926 | } | |
3927 | ||
e2d67052 | 3928 | static int ext4_commit_super(struct super_block *sb, int sync) |
ac27a0ec | 3929 | { |
e2d67052 | 3930 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
617ba13b | 3931 | struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; |
c4be0c1d | 3932 | int error = 0; |
ac27a0ec DK |
3933 | |
3934 | if (!sbh) | |
c4be0c1d | 3935 | return error; |
914258bf TT |
3936 | if (buffer_write_io_error(sbh)) { |
3937 | /* | |
3938 | * Oh, dear. A previous attempt to write the | |
3939 | * superblock failed. This could happen because the | |
3940 | * USB device was yanked out. Or it could happen to | |
3941 | * be a transient write error and maybe the block will | |
3942 | * be remapped. Nothing we can do but to retry the | |
3943 | * write and hope for the best. | |
3944 | */ | |
b31e1552 ES |
3945 | ext4_msg(sb, KERN_ERR, "previous I/O error to " |
3946 | "superblock detected"); | |
914258bf TT |
3947 | clear_buffer_write_io_error(sbh); |
3948 | set_buffer_uptodate(sbh); | |
3949 | } | |
71290b36 TT |
3950 | /* |
3951 | * If the file system is mounted read-only, don't update the | |
3952 | * superblock write time. This avoids updating the superblock | |
3953 | * write time when we are mounting the root file system | |
3954 | * read/only but we need to replay the journal; at that point, | |
3955 | * for people who are east of GMT and who make their clock | |
3956 | * tick in localtime for Windows bug-for-bug compatibility, | |
3957 | * the clock is set in the future, and this will cause e2fsck | |
3958 | * to complain and force a full file system check. | |
3959 | */ | |
3960 | if (!(sb->s_flags & MS_RDONLY)) | |
3961 | es->s_wtime = cpu_to_le32(get_seconds()); | |
f613dfcb TT |
3962 | if (sb->s_bdev->bd_part) |
3963 | es->s_kbytes_written = | |
3964 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + | |
afc32f7e TT |
3965 | ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - |
3966 | EXT4_SB(sb)->s_sectors_written_start) >> 1)); | |
f613dfcb TT |
3967 | else |
3968 | es->s_kbytes_written = | |
3969 | cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); | |
ce7e010a TT |
3970 | ext4_free_blocks_count_set(es, percpu_counter_sum_positive( |
3971 | &EXT4_SB(sb)->s_freeblocks_counter)); | |
3972 | es->s_free_inodes_count = | |
3973 | cpu_to_le32(percpu_counter_sum_positive( | |
3974 | &EXT4_SB(sb)->s_freeinodes_counter)); | |
7234ab2a | 3975 | sb->s_dirt = 0; |
ac27a0ec DK |
3976 | BUFFER_TRACE(sbh, "marking dirty"); |
3977 | mark_buffer_dirty(sbh); | |
914258bf | 3978 | if (sync) { |
c4be0c1d TS |
3979 | error = sync_dirty_buffer(sbh); |
3980 | if (error) | |
3981 | return error; | |
3982 | ||
3983 | error = buffer_write_io_error(sbh); | |
3984 | if (error) { | |
b31e1552 ES |
3985 | ext4_msg(sb, KERN_ERR, "I/O error while writing " |
3986 | "superblock"); | |
914258bf TT |
3987 | clear_buffer_write_io_error(sbh); |
3988 | set_buffer_uptodate(sbh); | |
3989 | } | |
3990 | } | |
c4be0c1d | 3991 | return error; |
ac27a0ec DK |
3992 | } |
3993 | ||
ac27a0ec DK |
3994 | /* |
3995 | * Have we just finished recovery? If so, and if we are mounting (or | |
3996 | * remounting) the filesystem readonly, then we will end up with a | |
3997 | * consistent fs on disk. Record that fact. | |
3998 | */ | |
2b2d6d01 TT |
3999 | static void ext4_mark_recovery_complete(struct super_block *sb, |
4000 | struct ext4_super_block *es) | |
ac27a0ec | 4001 | { |
617ba13b | 4002 | journal_t *journal = EXT4_SB(sb)->s_journal; |
ac27a0ec | 4003 | |
0390131b FM |
4004 | if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { |
4005 | BUG_ON(journal != NULL); | |
4006 | return; | |
4007 | } | |
dab291af | 4008 | jbd2_journal_lock_updates(journal); |
7ffe1ea8 HK |
4009 | if (jbd2_journal_flush(journal) < 0) |
4010 | goto out; | |
4011 | ||
617ba13b | 4012 | if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && |
ac27a0ec | 4013 | sb->s_flags & MS_RDONLY) { |
617ba13b | 4014 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); |
e2d67052 | 4015 | ext4_commit_super(sb, 1); |
ac27a0ec | 4016 | } |
7ffe1ea8 HK |
4017 | |
4018 | out: | |
dab291af | 4019 | jbd2_journal_unlock_updates(journal); |
ac27a0ec DK |
4020 | } |
4021 | ||
4022 | /* | |
4023 | * If we are mounting (or read-write remounting) a filesystem whose journal | |
4024 | * has recorded an error from a previous lifetime, move that error to the | |
4025 | * main filesystem now. | |
4026 | */ | |
2b2d6d01 TT |
4027 | static void ext4_clear_journal_err(struct super_block *sb, |
4028 | struct ext4_super_block *es) | |
ac27a0ec DK |
4029 | { |
4030 | journal_t *journal; | |
4031 | int j_errno; | |
4032 | const char *errstr; | |
4033 | ||
0390131b FM |
4034 | BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); |
4035 | ||
617ba13b | 4036 | journal = EXT4_SB(sb)->s_journal; |
ac27a0ec DK |
4037 | |
4038 | /* | |
4039 | * Now check for any error status which may have been recorded in the | |
617ba13b | 4040 | * journal by a prior ext4_error() or ext4_abort() |
ac27a0ec DK |
4041 | */ |
4042 | ||
dab291af | 4043 | j_errno = jbd2_journal_errno(journal); |
ac27a0ec DK |
4044 | if (j_errno) { |
4045 | char nbuf[16]; | |
4046 | ||
617ba13b | 4047 | errstr = ext4_decode_error(sb, j_errno, nbuf); |
12062ddd | 4048 | ext4_warning(sb, "Filesystem error recorded " |
ac27a0ec | 4049 | "from previous mount: %s", errstr); |
12062ddd | 4050 | ext4_warning(sb, "Marking fs in need of filesystem check."); |
ac27a0ec | 4051 | |
617ba13b MC |
4052 | EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; |
4053 | es->s_state |= cpu_to_le16(EXT4_ERROR_FS); | |
e2d67052 | 4054 | ext4_commit_super(sb, 1); |
ac27a0ec | 4055 | |
dab291af | 4056 | jbd2_journal_clear_err(journal); |
ac27a0ec DK |
4057 | } |
4058 | } | |
4059 | ||
4060 | /* | |
4061 | * Force the running and committing transactions to commit, | |
4062 | * and wait on the commit. | |
4063 | */ | |
617ba13b | 4064 | int ext4_force_commit(struct super_block *sb) |
ac27a0ec DK |
4065 | { |
4066 | journal_t *journal; | |
0390131b | 4067 | int ret = 0; |
ac27a0ec DK |
4068 | |
4069 | if (sb->s_flags & MS_RDONLY) | |
4070 | return 0; | |
4071 | ||
617ba13b | 4072 | journal = EXT4_SB(sb)->s_journal; |
6b0310fb | 4073 | if (journal) { |
437f88cc | 4074 | vfs_check_frozen(sb, SB_FREEZE_TRANS); |
0390131b | 4075 | ret = ext4_journal_force_commit(journal); |
6b0310fb | 4076 | } |
0390131b | 4077 | |
ac27a0ec DK |
4078 | return ret; |
4079 | } | |
4080 | ||
2b2d6d01 | 4081 | static void ext4_write_super(struct super_block *sb) |
ac27a0ec | 4082 | { |
ebc1ac16 | 4083 | lock_super(sb); |
9ca92389 | 4084 | ext4_commit_super(sb, 1); |
ebc1ac16 | 4085 | unlock_super(sb); |
ac27a0ec DK |
4086 | } |
4087 | ||
617ba13b | 4088 | static int ext4_sync_fs(struct super_block *sb, int wait) |
ac27a0ec | 4089 | { |
14ce0cb4 | 4090 | int ret = 0; |
9eddacf9 | 4091 | tid_t target; |
8d5d02e6 | 4092 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
ac27a0ec | 4093 | |
9bffad1e | 4094 | trace_ext4_sync_fs(sb, wait); |
8d5d02e6 MC |
4095 | flush_workqueue(sbi->dio_unwritten_wq); |
4096 | if (jbd2_journal_start_commit(sbi->s_journal, &target)) { | |
9ca92389 | 4097 | if (wait) |
8d5d02e6 | 4098 | jbd2_log_wait_commit(sbi->s_journal, target); |
0390131b | 4099 | } |
14ce0cb4 | 4100 | return ret; |
ac27a0ec DK |
4101 | } |
4102 | ||
4103 | /* | |
4104 | * LVM calls this function before a (read-only) snapshot is created. This | |
4105 | * gives us a chance to flush the journal completely and mark the fs clean. | |
4106 | */ | |
c4be0c1d | 4107 | static int ext4_freeze(struct super_block *sb) |
ac27a0ec | 4108 | { |
c4be0c1d TS |
4109 | int error = 0; |
4110 | journal_t *journal; | |
ac27a0ec | 4111 | |
9ca92389 TT |
4112 | if (sb->s_flags & MS_RDONLY) |
4113 | return 0; | |
ac27a0ec | 4114 | |
9ca92389 | 4115 | journal = EXT4_SB(sb)->s_journal; |
7ffe1ea8 | 4116 | |
9ca92389 TT |
4117 | /* Now we set up the journal barrier. */ |
4118 | jbd2_journal_lock_updates(journal); | |
ac27a0ec | 4119 | |
9ca92389 TT |
4120 | /* |
4121 | * Don't clear the needs_recovery flag if we failed to flush | |
4122 | * the journal. | |
4123 | */ | |
4124 | error = jbd2_journal_flush(journal); | |
6b0310fb ES |
4125 | if (error < 0) |
4126 | goto out; | |
9ca92389 TT |
4127 | |
4128 | /* Journal blocked and flushed, clear needs_recovery flag. */ | |
4129 | EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4130 | error = ext4_commit_super(sb, 1); | |
6b0310fb ES |
4131 | out: |
4132 | /* we rely on s_frozen to stop further updates */ | |
4133 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); | |
4134 | return error; | |
ac27a0ec DK |
4135 | } |
4136 | ||
4137 | /* | |
4138 | * Called by LVM after the snapshot is done. We need to reset the RECOVER | |
4139 | * flag here, even though the filesystem is not technically dirty yet. | |
4140 | */ | |
c4be0c1d | 4141 | static int ext4_unfreeze(struct super_block *sb) |
ac27a0ec | 4142 | { |
9ca92389 TT |
4143 | if (sb->s_flags & MS_RDONLY) |
4144 | return 0; | |
4145 | ||
4146 | lock_super(sb); | |
4147 | /* Reset the needs_recovery flag before the fs is unlocked. */ | |
4148 | EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); | |
4149 | ext4_commit_super(sb, 1); | |
4150 | unlock_super(sb); | |
c4be0c1d | 4151 | return 0; |
ac27a0ec DK |
4152 | } |
4153 | ||
2b2d6d01 | 4154 | static int ext4_remount(struct super_block *sb, int *flags, char *data) |
ac27a0ec | 4155 | { |
2b2d6d01 | 4156 | struct ext4_super_block *es; |
617ba13b MC |
4157 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4158 | ext4_fsblk_t n_blocks_count = 0; | |
ac27a0ec | 4159 | unsigned long old_sb_flags; |
617ba13b | 4160 | struct ext4_mount_options old_opts; |
c79d967d | 4161 | int enable_quota = 0; |
8a266467 | 4162 | ext4_group_t g; |
b3881f74 | 4163 | unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; |
ac27a0ec DK |
4164 | int err; |
4165 | #ifdef CONFIG_QUOTA | |
4166 | int i; | |
4167 | #endif | |
d4c402d9 | 4168 | char *orig_data = kstrdup(data, GFP_KERNEL); |
ac27a0ec DK |
4169 | |
4170 | /* Store the original options */ | |
bbd6851a | 4171 | lock_super(sb); |
ac27a0ec DK |
4172 | old_sb_flags = sb->s_flags; |
4173 | old_opts.s_mount_opt = sbi->s_mount_opt; | |
4174 | old_opts.s_resuid = sbi->s_resuid; | |
4175 | old_opts.s_resgid = sbi->s_resgid; | |
4176 | old_opts.s_commit_interval = sbi->s_commit_interval; | |
30773840 TT |
4177 | old_opts.s_min_batch_time = sbi->s_min_batch_time; |
4178 | old_opts.s_max_batch_time = sbi->s_max_batch_time; | |
ac27a0ec DK |
4179 | #ifdef CONFIG_QUOTA |
4180 | old_opts.s_jquota_fmt = sbi->s_jquota_fmt; | |
4181 | for (i = 0; i < MAXQUOTAS; i++) | |
4182 | old_opts.s_qf_names[i] = sbi->s_qf_names[i]; | |
4183 | #endif | |
b3881f74 TT |
4184 | if (sbi->s_journal && sbi->s_journal->j_task->io_context) |
4185 | journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; | |
ac27a0ec DK |
4186 | |
4187 | /* | |
4188 | * Allow the "check" option to be passed as a remount option. | |
4189 | */ | |
b3881f74 TT |
4190 | if (!parse_options(data, sb, NULL, &journal_ioprio, |
4191 | &n_blocks_count, 1)) { | |
ac27a0ec DK |
4192 | err = -EINVAL; |
4193 | goto restore_opts; | |
4194 | } | |
4195 | ||
4ab2f15b | 4196 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) |
c67d859e | 4197 | ext4_abort(sb, "Abort forced by user"); |
ac27a0ec DK |
4198 | |
4199 | sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | | |
482a7425 | 4200 | (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); |
ac27a0ec DK |
4201 | |
4202 | es = sbi->s_es; | |
4203 | ||
b3881f74 | 4204 | if (sbi->s_journal) { |
0390131b | 4205 | ext4_init_journal_params(sb, sbi->s_journal); |
b3881f74 TT |
4206 | set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); |
4207 | } | |
ac27a0ec DK |
4208 | |
4209 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || | |
bd81d8ee | 4210 | n_blocks_count > ext4_blocks_count(es)) { |
4ab2f15b | 4211 | if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { |
ac27a0ec DK |
4212 | err = -EROFS; |
4213 | goto restore_opts; | |
4214 | } | |
4215 | ||
4216 | if (*flags & MS_RDONLY) { | |
0f0dd62f CH |
4217 | err = dquot_suspend(sb, -1); |
4218 | if (err < 0) | |
c79d967d | 4219 | goto restore_opts; |
c79d967d | 4220 | |
ac27a0ec DK |
4221 | /* |
4222 | * First of all, the unconditional stuff we have to do | |
4223 | * to disable replay of the journal when we next remount | |
4224 | */ | |
4225 | sb->s_flags |= MS_RDONLY; | |
4226 | ||
4227 | /* | |
4228 | * OK, test if we are remounting a valid rw partition | |
4229 | * readonly, and if so set the rdonly flag and then | |
4230 | * mark the partition as valid again. | |
4231 | */ | |
617ba13b MC |
4232 | if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && |
4233 | (sbi->s_mount_state & EXT4_VALID_FS)) | |
ac27a0ec DK |
4234 | es->s_state = cpu_to_le16(sbi->s_mount_state); |
4235 | ||
a63c9eb2 | 4236 | if (sbi->s_journal) |
0390131b | 4237 | ext4_mark_recovery_complete(sb, es); |
ac27a0ec | 4238 | } else { |
a13fb1a4 ES |
4239 | /* Make sure we can mount this feature set readwrite */ |
4240 | if (!ext4_feature_set_ok(sb, 0)) { | |
ac27a0ec DK |
4241 | err = -EROFS; |
4242 | goto restore_opts; | |
4243 | } | |
8a266467 TT |
4244 | /* |
4245 | * Make sure the group descriptor checksums | |
0b8e58a1 | 4246 | * are sane. If they aren't, refuse to remount r/w. |
8a266467 TT |
4247 | */ |
4248 | for (g = 0; g < sbi->s_groups_count; g++) { | |
4249 | struct ext4_group_desc *gdp = | |
4250 | ext4_get_group_desc(sb, g, NULL); | |
4251 | ||
4252 | if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { | |
b31e1552 ES |
4253 | ext4_msg(sb, KERN_ERR, |
4254 | "ext4_remount: Checksum for group %u failed (%u!=%u)", | |
8a266467 TT |
4255 | g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), |
4256 | le16_to_cpu(gdp->bg_checksum)); | |
4257 | err = -EINVAL; | |
4258 | goto restore_opts; | |
4259 | } | |
4260 | } | |
4261 | ||
ead6596b ES |
4262 | /* |
4263 | * If we have an unprocessed orphan list hanging | |
4264 | * around from a previously readonly bdev mount, | |
4265 | * require a full umount/remount for now. | |
4266 | */ | |
4267 | if (es->s_last_orphan) { | |
b31e1552 | 4268 | ext4_msg(sb, KERN_WARNING, "Couldn't " |
ead6596b ES |
4269 | "remount RDWR because of unprocessed " |
4270 | "orphan inode list. Please " | |
b31e1552 | 4271 | "umount/remount instead"); |
ead6596b ES |
4272 | err = -EINVAL; |
4273 | goto restore_opts; | |
4274 | } | |
4275 | ||
ac27a0ec DK |
4276 | /* |
4277 | * Mounting a RDONLY partition read-write, so reread | |
4278 | * and store the current valid flag. (It may have | |
4279 | * been changed by e2fsck since we originally mounted | |
4280 | * the partition.) | |
4281 | */ | |
0390131b FM |
4282 | if (sbi->s_journal) |
4283 | ext4_clear_journal_err(sb, es); | |
ac27a0ec | 4284 | sbi->s_mount_state = le16_to_cpu(es->s_state); |
617ba13b | 4285 | if ((err = ext4_group_extend(sb, es, n_blocks_count))) |
ac27a0ec | 4286 | goto restore_opts; |
2b2d6d01 | 4287 | if (!ext4_setup_super(sb, es, 0)) |
ac27a0ec | 4288 | sb->s_flags &= ~MS_RDONLY; |
c79d967d | 4289 | enable_quota = 1; |
ac27a0ec DK |
4290 | } |
4291 | } | |
bfff6873 LC |
4292 | |
4293 | /* | |
4294 | * Reinitialize lazy itable initialization thread based on | |
4295 | * current settings | |
4296 | */ | |
4297 | if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) | |
4298 | ext4_unregister_li_request(sb); | |
4299 | else { | |
4300 | ext4_group_t first_not_zeroed; | |
4301 | first_not_zeroed = ext4_has_uninit_itable(sb); | |
4302 | ext4_register_li_request(sb, first_not_zeroed); | |
4303 | } | |
4304 | ||
6fd058f7 | 4305 | ext4_setup_system_zone(sb); |
0390131b | 4306 | if (sbi->s_journal == NULL) |
e2d67052 | 4307 | ext4_commit_super(sb, 1); |
0390131b | 4308 | |
ac27a0ec DK |
4309 | #ifdef CONFIG_QUOTA |
4310 | /* Release old quota file names */ | |
4311 | for (i = 0; i < MAXQUOTAS; i++) | |
4312 | if (old_opts.s_qf_names[i] && | |
4313 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4314 | kfree(old_opts.s_qf_names[i]); | |
4315 | #endif | |
bbd6851a | 4316 | unlock_super(sb); |
c79d967d | 4317 | if (enable_quota) |
0f0dd62f | 4318 | dquot_resume(sb, -1); |
d4c402d9 CW |
4319 | |
4320 | ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); | |
4321 | kfree(orig_data); | |
ac27a0ec | 4322 | return 0; |
0b8e58a1 | 4323 | |
ac27a0ec DK |
4324 | restore_opts: |
4325 | sb->s_flags = old_sb_flags; | |
4326 | sbi->s_mount_opt = old_opts.s_mount_opt; | |
4327 | sbi->s_resuid = old_opts.s_resuid; | |
4328 | sbi->s_resgid = old_opts.s_resgid; | |
4329 | sbi->s_commit_interval = old_opts.s_commit_interval; | |
30773840 TT |
4330 | sbi->s_min_batch_time = old_opts.s_min_batch_time; |
4331 | sbi->s_max_batch_time = old_opts.s_max_batch_time; | |
ac27a0ec DK |
4332 | #ifdef CONFIG_QUOTA |
4333 | sbi->s_jquota_fmt = old_opts.s_jquota_fmt; | |
4334 | for (i = 0; i < MAXQUOTAS; i++) { | |
4335 | if (sbi->s_qf_names[i] && | |
4336 | old_opts.s_qf_names[i] != sbi->s_qf_names[i]) | |
4337 | kfree(sbi->s_qf_names[i]); | |
4338 | sbi->s_qf_names[i] = old_opts.s_qf_names[i]; | |
4339 | } | |
4340 | #endif | |
bbd6851a | 4341 | unlock_super(sb); |
d4c402d9 | 4342 | kfree(orig_data); |
ac27a0ec DK |
4343 | return err; |
4344 | } | |
4345 | ||
2b2d6d01 | 4346 | static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) |
ac27a0ec DK |
4347 | { |
4348 | struct super_block *sb = dentry->d_sb; | |
617ba13b MC |
4349 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
4350 | struct ext4_super_block *es = sbi->s_es; | |
960cc398 | 4351 | u64 fsid; |
ac27a0ec | 4352 | |
5e70030d BP |
4353 | if (test_opt(sb, MINIX_DF)) { |
4354 | sbi->s_overhead_last = 0; | |
6bc9feff | 4355 | } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { |
8df9675f | 4356 | ext4_group_t i, ngroups = ext4_get_groups_count(sb); |
5e70030d | 4357 | ext4_fsblk_t overhead = 0; |
ac27a0ec DK |
4358 | |
4359 | /* | |
5e70030d BP |
4360 | * Compute the overhead (FS structures). This is constant |
4361 | * for a given filesystem unless the number of block groups | |
4362 | * changes so we cache the previous value until it does. | |
ac27a0ec DK |
4363 | */ |
4364 | ||
4365 | /* | |
4366 | * All of the blocks before first_data_block are | |
4367 | * overhead | |
4368 | */ | |
4369 | overhead = le32_to_cpu(es->s_first_data_block); | |
4370 | ||
4371 | /* | |
4372 | * Add the overhead attributed to the superblock and | |
4373 | * block group descriptors. If the sparse superblocks | |
4374 | * feature is turned on, then not all groups have this. | |
4375 | */ | |
4376 | for (i = 0; i < ngroups; i++) { | |
617ba13b MC |
4377 | overhead += ext4_bg_has_super(sb, i) + |
4378 | ext4_bg_num_gdb(sb, i); | |
ac27a0ec DK |
4379 | cond_resched(); |
4380 | } | |
4381 | ||
4382 | /* | |
4383 | * Every block group has an inode bitmap, a block | |
4384 | * bitmap, and an inode table. | |
4385 | */ | |
5e70030d BP |
4386 | overhead += ngroups * (2 + sbi->s_itb_per_group); |
4387 | sbi->s_overhead_last = overhead; | |
4388 | smp_wmb(); | |
6bc9feff | 4389 | sbi->s_blocks_last = ext4_blocks_count(es); |
ac27a0ec DK |
4390 | } |
4391 | ||
617ba13b | 4392 | buf->f_type = EXT4_SUPER_MAGIC; |
ac27a0ec | 4393 | buf->f_bsize = sb->s_blocksize; |
5e70030d | 4394 | buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; |
6bc6e63f AK |
4395 | buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - |
4396 | percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); | |
bd81d8ee LV |
4397 | buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); |
4398 | if (buf->f_bfree < ext4_r_blocks_count(es)) | |
ac27a0ec DK |
4399 | buf->f_bavail = 0; |
4400 | buf->f_files = le32_to_cpu(es->s_inodes_count); | |
52d9f3b4 | 4401 | buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); |
617ba13b | 4402 | buf->f_namelen = EXT4_NAME_LEN; |
960cc398 PE |
4403 | fsid = le64_to_cpup((void *)es->s_uuid) ^ |
4404 | le64_to_cpup((void *)es->s_uuid + sizeof(u64)); | |
4405 | buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; | |
4406 | buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; | |
0b8e58a1 | 4407 | |
ac27a0ec DK |
4408 | return 0; |
4409 | } | |
4410 | ||
0b8e58a1 AD |
4411 | /* Helper function for writing quotas on sync - we need to start transaction |
4412 | * before quota file is locked for write. Otherwise the are possible deadlocks: | |
ac27a0ec | 4413 | * Process 1 Process 2 |
617ba13b | 4414 | * ext4_create() quota_sync() |
a269eb18 | 4415 | * jbd2_journal_start() write_dquot() |
871a2931 | 4416 | * dquot_initialize() down(dqio_mutex) |
dab291af | 4417 | * down(dqio_mutex) jbd2_journal_start() |
ac27a0ec DK |
4418 | * |
4419 | */ | |
4420 | ||
4421 | #ifdef CONFIG_QUOTA | |
4422 | ||
4423 | static inline struct inode *dquot_to_inode(struct dquot *dquot) | |
4424 | { | |
4425 | return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; | |
4426 | } | |
4427 | ||
617ba13b | 4428 | static int ext4_write_dquot(struct dquot *dquot) |
ac27a0ec DK |
4429 | { |
4430 | int ret, err; | |
4431 | handle_t *handle; | |
4432 | struct inode *inode; | |
4433 | ||
4434 | inode = dquot_to_inode(dquot); | |
617ba13b | 4435 | handle = ext4_journal_start(inode, |
0b8e58a1 | 4436 | EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4437 | if (IS_ERR(handle)) |
4438 | return PTR_ERR(handle); | |
4439 | ret = dquot_commit(dquot); | |
617ba13b | 4440 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4441 | if (!ret) |
4442 | ret = err; | |
4443 | return ret; | |
4444 | } | |
4445 | ||
617ba13b | 4446 | static int ext4_acquire_dquot(struct dquot *dquot) |
ac27a0ec DK |
4447 | { |
4448 | int ret, err; | |
4449 | handle_t *handle; | |
4450 | ||
617ba13b | 4451 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4452 | EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); |
ac27a0ec DK |
4453 | if (IS_ERR(handle)) |
4454 | return PTR_ERR(handle); | |
4455 | ret = dquot_acquire(dquot); | |
617ba13b | 4456 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4457 | if (!ret) |
4458 | ret = err; | |
4459 | return ret; | |
4460 | } | |
4461 | ||
617ba13b | 4462 | static int ext4_release_dquot(struct dquot *dquot) |
ac27a0ec DK |
4463 | { |
4464 | int ret, err; | |
4465 | handle_t *handle; | |
4466 | ||
617ba13b | 4467 | handle = ext4_journal_start(dquot_to_inode(dquot), |
0b8e58a1 | 4468 | EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); |
9c3013e9 JK |
4469 | if (IS_ERR(handle)) { |
4470 | /* Release dquot anyway to avoid endless cycle in dqput() */ | |
4471 | dquot_release(dquot); | |
ac27a0ec | 4472 | return PTR_ERR(handle); |
9c3013e9 | 4473 | } |
ac27a0ec | 4474 | ret = dquot_release(dquot); |
617ba13b | 4475 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4476 | if (!ret) |
4477 | ret = err; | |
4478 | return ret; | |
4479 | } | |
4480 | ||
617ba13b | 4481 | static int ext4_mark_dquot_dirty(struct dquot *dquot) |
ac27a0ec | 4482 | { |
2c8be6b2 | 4483 | /* Are we journaling quotas? */ |
617ba13b MC |
4484 | if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || |
4485 | EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { | |
ac27a0ec | 4486 | dquot_mark_dquot_dirty(dquot); |
617ba13b | 4487 | return ext4_write_dquot(dquot); |
ac27a0ec DK |
4488 | } else { |
4489 | return dquot_mark_dquot_dirty(dquot); | |
4490 | } | |
4491 | } | |
4492 | ||
617ba13b | 4493 | static int ext4_write_info(struct super_block *sb, int type) |
ac27a0ec DK |
4494 | { |
4495 | int ret, err; | |
4496 | handle_t *handle; | |
4497 | ||
4498 | /* Data block + inode block */ | |
617ba13b | 4499 | handle = ext4_journal_start(sb->s_root->d_inode, 2); |
ac27a0ec DK |
4500 | if (IS_ERR(handle)) |
4501 | return PTR_ERR(handle); | |
4502 | ret = dquot_commit_info(sb, type); | |
617ba13b | 4503 | err = ext4_journal_stop(handle); |
ac27a0ec DK |
4504 | if (!ret) |
4505 | ret = err; | |
4506 | return ret; | |
4507 | } | |
4508 | ||
4509 | /* | |
4510 | * Turn on quotas during mount time - we need to find | |
4511 | * the quota file and such... | |
4512 | */ | |
617ba13b | 4513 | static int ext4_quota_on_mount(struct super_block *sb, int type) |
ac27a0ec | 4514 | { |
287a8095 CH |
4515 | return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], |
4516 | EXT4_SB(sb)->s_jquota_fmt, type); | |
ac27a0ec DK |
4517 | } |
4518 | ||
4519 | /* | |
4520 | * Standard function to be called on quota_on | |
4521 | */ | |
617ba13b | 4522 | static int ext4_quota_on(struct super_block *sb, int type, int format_id, |
307ae18a | 4523 | char *name) |
ac27a0ec DK |
4524 | { |
4525 | int err; | |
8264613d | 4526 | struct path path; |
ac27a0ec DK |
4527 | |
4528 | if (!test_opt(sb, QUOTA)) | |
4529 | return -EINVAL; | |
0623543b | 4530 | |
8264613d | 4531 | err = kern_path(name, LOOKUP_FOLLOW, &path); |
ac27a0ec DK |
4532 | if (err) |
4533 | return err; | |
0623543b | 4534 | |
ac27a0ec | 4535 | /* Quotafile not on the same filesystem? */ |
8264613d AV |
4536 | if (path.mnt->mnt_sb != sb) { |
4537 | path_put(&path); | |
ac27a0ec DK |
4538 | return -EXDEV; |
4539 | } | |
0623543b JK |
4540 | /* Journaling quota? */ |
4541 | if (EXT4_SB(sb)->s_qf_names[type]) { | |
2b2d6d01 | 4542 | /* Quotafile not in fs root? */ |
8264613d | 4543 | if (path.dentry->d_parent != sb->s_root) |
b31e1552 ES |
4544 | ext4_msg(sb, KERN_WARNING, |
4545 | "Quota file not on filesystem root. " | |
4546 | "Journaled quota will not work"); | |
2b2d6d01 | 4547 | } |
0623543b JK |
4548 | |
4549 | /* | |
4550 | * When we journal data on quota file, we have to flush journal to see | |
4551 | * all updates to the file when we bypass pagecache... | |
4552 | */ | |
0390131b FM |
4553 | if (EXT4_SB(sb)->s_journal && |
4554 | ext4_should_journal_data(path.dentry->d_inode)) { | |
0623543b JK |
4555 | /* |
4556 | * We don't need to lock updates but journal_flush() could | |
4557 | * otherwise be livelocked... | |
4558 | */ | |
4559 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); | |
7ffe1ea8 | 4560 | err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
0623543b | 4561 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
7ffe1ea8 | 4562 | if (err) { |
8264613d | 4563 | path_put(&path); |
7ffe1ea8 HK |
4564 | return err; |
4565 | } | |
0623543b JK |
4566 | } |
4567 | ||
287a8095 | 4568 | err = dquot_quota_on_path(sb, type, format_id, &path); |
8264613d | 4569 | path_put(&path); |
77e69dac | 4570 | return err; |
ac27a0ec DK |
4571 | } |
4572 | ||
ca0e05e4 DM |
4573 | static int ext4_quota_off(struct super_block *sb, int type) |
4574 | { | |
87009d86 DM |
4575 | /* Force all delayed allocation blocks to be allocated. |
4576 | * Caller already holds s_umount sem */ | |
4577 | if (test_opt(sb, DELALLOC)) | |
ca0e05e4 | 4578 | sync_filesystem(sb); |
ca0e05e4 DM |
4579 | |
4580 | return dquot_quota_off(sb, type); | |
4581 | } | |
4582 | ||
ac27a0ec DK |
4583 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
4584 | * acquiring the locks... As quota files are never truncated and quota code | |
4585 | * itself serializes the operations (and noone else should touch the files) | |
4586 | * we don't have to be afraid of races */ | |
617ba13b | 4587 | static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, |
ac27a0ec DK |
4588 | size_t len, loff_t off) |
4589 | { | |
4590 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4591 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4592 | int err = 0; |
4593 | int offset = off & (sb->s_blocksize - 1); | |
4594 | int tocopy; | |
4595 | size_t toread; | |
4596 | struct buffer_head *bh; | |
4597 | loff_t i_size = i_size_read(inode); | |
4598 | ||
4599 | if (off > i_size) | |
4600 | return 0; | |
4601 | if (off+len > i_size) | |
4602 | len = i_size-off; | |
4603 | toread = len; | |
4604 | while (toread > 0) { | |
4605 | tocopy = sb->s_blocksize - offset < toread ? | |
4606 | sb->s_blocksize - offset : toread; | |
617ba13b | 4607 | bh = ext4_bread(NULL, inode, blk, 0, &err); |
ac27a0ec DK |
4608 | if (err) |
4609 | return err; | |
4610 | if (!bh) /* A hole? */ | |
4611 | memset(data, 0, tocopy); | |
4612 | else | |
4613 | memcpy(data, bh->b_data+offset, tocopy); | |
4614 | brelse(bh); | |
4615 | offset = 0; | |
4616 | toread -= tocopy; | |
4617 | data += tocopy; | |
4618 | blk++; | |
4619 | } | |
4620 | return len; | |
4621 | } | |
4622 | ||
4623 | /* Write to quotafile (we know the transaction is already started and has | |
4624 | * enough credits) */ | |
617ba13b | 4625 | static ssize_t ext4_quota_write(struct super_block *sb, int type, |
ac27a0ec DK |
4626 | const char *data, size_t len, loff_t off) |
4627 | { | |
4628 | struct inode *inode = sb_dqopt(sb)->files[type]; | |
725d26d3 | 4629 | ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); |
ac27a0ec DK |
4630 | int err = 0; |
4631 | int offset = off & (sb->s_blocksize - 1); | |
ac27a0ec DK |
4632 | struct buffer_head *bh; |
4633 | handle_t *handle = journal_current_handle(); | |
4634 | ||
0390131b | 4635 | if (EXT4_SB(sb)->s_journal && !handle) { |
b31e1552 ES |
4636 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" |
4637 | " cancelled because transaction is not started", | |
9c3013e9 JK |
4638 | (unsigned long long)off, (unsigned long long)len); |
4639 | return -EIO; | |
4640 | } | |
67eeb568 DM |
4641 | /* |
4642 | * Since we account only one data block in transaction credits, | |
4643 | * then it is impossible to cross a block boundary. | |
4644 | */ | |
4645 | if (sb->s_blocksize - offset < len) { | |
4646 | ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" | |
4647 | " cancelled because not block aligned", | |
4648 | (unsigned long long)off, (unsigned long long)len); | |
4649 | return -EIO; | |
4650 | } | |
4651 | ||
ac27a0ec | 4652 | mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); |
67eeb568 DM |
4653 | bh = ext4_bread(handle, inode, blk, 1, &err); |
4654 | if (!bh) | |
4655 | goto out; | |
62d2b5f2 JK |
4656 | err = ext4_journal_get_write_access(handle, bh); |
4657 | if (err) { | |
4658 | brelse(bh); | |
4659 | goto out; | |
ac27a0ec | 4660 | } |
67eeb568 DM |
4661 | lock_buffer(bh); |
4662 | memcpy(bh->b_data+offset, data, len); | |
4663 | flush_dcache_page(bh->b_page); | |
4664 | unlock_buffer(bh); | |
62d2b5f2 | 4665 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
67eeb568 | 4666 | brelse(bh); |
ac27a0ec | 4667 | out: |
67eeb568 | 4668 | if (err) { |
4d04e4fb | 4669 | mutex_unlock(&inode->i_mutex); |
ac27a0ec | 4670 | return err; |
4d04e4fb | 4671 | } |
67eeb568 DM |
4672 | if (inode->i_size < off + len) { |
4673 | i_size_write(inode, off + len); | |
617ba13b | 4674 | EXT4_I(inode)->i_disksize = inode->i_size; |
ac27a0ec | 4675 | } |
ac27a0ec | 4676 | inode->i_mtime = inode->i_ctime = CURRENT_TIME; |
617ba13b | 4677 | ext4_mark_inode_dirty(handle, inode); |
ac27a0ec | 4678 | mutex_unlock(&inode->i_mutex); |
67eeb568 | 4679 | return len; |
ac27a0ec DK |
4680 | } |
4681 | ||
4682 | #endif | |
4683 | ||
152a0836 AV |
4684 | static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, |
4685 | const char *dev_name, void *data) | |
ac27a0ec | 4686 | { |
152a0836 | 4687 | return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); |
ac27a0ec DK |
4688 | } |
4689 | ||
37f328eb | 4690 | #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4691 | static struct file_system_type ext2_fs_type = { |
4692 | .owner = THIS_MODULE, | |
4693 | .name = "ext2", | |
152a0836 | 4694 | .mount = ext4_mount, |
24b58424 TT |
4695 | .kill_sb = kill_block_super, |
4696 | .fs_flags = FS_REQUIRES_DEV, | |
4697 | }; | |
4698 | ||
4699 | static inline void register_as_ext2(void) | |
4700 | { | |
4701 | int err = register_filesystem(&ext2_fs_type); | |
4702 | if (err) | |
4703 | printk(KERN_WARNING | |
4704 | "EXT4-fs: Unable to register as ext2 (%d)\n", err); | |
4705 | } | |
4706 | ||
4707 | static inline void unregister_as_ext2(void) | |
4708 | { | |
4709 | unregister_filesystem(&ext2_fs_type); | |
4710 | } | |
51b7e3c9 | 4711 | MODULE_ALIAS("ext2"); |
24b58424 TT |
4712 | #else |
4713 | static inline void register_as_ext2(void) { } | |
4714 | static inline void unregister_as_ext2(void) { } | |
4715 | #endif | |
4716 | ||
37f328eb | 4717 | #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) |
24b58424 TT |
4718 | static inline void register_as_ext3(void) |
4719 | { | |
4720 | int err = register_filesystem(&ext3_fs_type); | |
4721 | if (err) | |
4722 | printk(KERN_WARNING | |
4723 | "EXT4-fs: Unable to register as ext3 (%d)\n", err); | |
4724 | } | |
4725 | ||
4726 | static inline void unregister_as_ext3(void) | |
4727 | { | |
4728 | unregister_filesystem(&ext3_fs_type); | |
4729 | } | |
51b7e3c9 | 4730 | MODULE_ALIAS("ext3"); |
24b58424 TT |
4731 | #else |
4732 | static inline void register_as_ext3(void) { } | |
4733 | static inline void unregister_as_ext3(void) { } | |
4734 | #endif | |
4735 | ||
03010a33 TT |
4736 | static struct file_system_type ext4_fs_type = { |
4737 | .owner = THIS_MODULE, | |
4738 | .name = "ext4", | |
152a0836 | 4739 | .mount = ext4_mount, |
03010a33 TT |
4740 | .kill_sb = kill_block_super, |
4741 | .fs_flags = FS_REQUIRES_DEV, | |
4742 | }; | |
4743 | ||
857ac889 LC |
4744 | int __init ext4_init_feat_adverts(void) |
4745 | { | |
4746 | struct ext4_features *ef; | |
4747 | int ret = -ENOMEM; | |
4748 | ||
4749 | ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); | |
4750 | if (!ef) | |
4751 | goto out; | |
4752 | ||
4753 | ef->f_kobj.kset = ext4_kset; | |
4754 | init_completion(&ef->f_kobj_unregister); | |
4755 | ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, | |
4756 | "features"); | |
4757 | if (ret) { | |
4758 | kfree(ef); | |
4759 | goto out; | |
4760 | } | |
4761 | ||
4762 | ext4_feat = ef; | |
4763 | ret = 0; | |
4764 | out: | |
4765 | return ret; | |
4766 | } | |
4767 | ||
5dabfc78 | 4768 | static int __init ext4_init_fs(void) |
ac27a0ec | 4769 | { |
c9de560d AT |
4770 | int err; |
4771 | ||
12e9b892 | 4772 | ext4_check_flag_values(); |
5dabfc78 | 4773 | err = ext4_init_pageio(); |
6fd058f7 TT |
4774 | if (err) |
4775 | return err; | |
5dabfc78 | 4776 | err = ext4_init_system_zone(); |
bd2d0210 TT |
4777 | if (err) |
4778 | goto out5; | |
3197ebdb TT |
4779 | ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); |
4780 | if (!ext4_kset) | |
6fd058f7 | 4781 | goto out4; |
9f6200bb | 4782 | ext4_proc_root = proc_mkdir("fs/ext4", NULL); |
857ac889 LC |
4783 | |
4784 | err = ext4_init_feat_adverts(); | |
4785 | ||
5dabfc78 | 4786 | err = ext4_init_mballoc(); |
ac27a0ec | 4787 | if (err) |
6fd058f7 | 4788 | goto out3; |
c9de560d | 4789 | |
5dabfc78 | 4790 | err = ext4_init_xattr(); |
c9de560d AT |
4791 | if (err) |
4792 | goto out2; | |
ac27a0ec DK |
4793 | err = init_inodecache(); |
4794 | if (err) | |
4795 | goto out1; | |
24b58424 TT |
4796 | register_as_ext2(); |
4797 | register_as_ext3(); | |
03010a33 | 4798 | err = register_filesystem(&ext4_fs_type); |
ac27a0ec DK |
4799 | if (err) |
4800 | goto out; | |
bfff6873 LC |
4801 | |
4802 | ext4_li_info = NULL; | |
4803 | mutex_init(&ext4_li_mtx); | |
ac27a0ec DK |
4804 | return 0; |
4805 | out: | |
24b58424 TT |
4806 | unregister_as_ext2(); |
4807 | unregister_as_ext3(); | |
ac27a0ec DK |
4808 | destroy_inodecache(); |
4809 | out1: | |
5dabfc78 | 4810 | ext4_exit_xattr(); |
c9de560d | 4811 | out2: |
5dabfc78 | 4812 | ext4_exit_mballoc(); |
6fd058f7 | 4813 | out3: |
857ac889 | 4814 | kfree(ext4_feat); |
6fd058f7 TT |
4815 | remove_proc_entry("fs/ext4", NULL); |
4816 | kset_unregister(ext4_kset); | |
4817 | out4: | |
5dabfc78 | 4818 | ext4_exit_system_zone(); |
bd2d0210 | 4819 | out5: |
5dabfc78 | 4820 | ext4_exit_pageio(); |
ac27a0ec DK |
4821 | return err; |
4822 | } | |
4823 | ||
5dabfc78 | 4824 | static void __exit ext4_exit_fs(void) |
ac27a0ec | 4825 | { |
bfff6873 | 4826 | ext4_destroy_lazyinit_thread(); |
24b58424 TT |
4827 | unregister_as_ext2(); |
4828 | unregister_as_ext3(); | |
03010a33 | 4829 | unregister_filesystem(&ext4_fs_type); |
ac27a0ec | 4830 | destroy_inodecache(); |
5dabfc78 TT |
4831 | ext4_exit_xattr(); |
4832 | ext4_exit_mballoc(); | |
9f6200bb | 4833 | remove_proc_entry("fs/ext4", NULL); |
3197ebdb | 4834 | kset_unregister(ext4_kset); |
5dabfc78 TT |
4835 | ext4_exit_system_zone(); |
4836 | ext4_exit_pageio(); | |
ac27a0ec DK |
4837 | } |
4838 | ||
4839 | MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); | |
83982b6f | 4840 | MODULE_DESCRIPTION("Fourth Extended Filesystem"); |
ac27a0ec | 4841 | MODULE_LICENSE("GPL"); |
5dabfc78 TT |
4842 | module_init(ext4_init_fs) |
4843 | module_exit(ext4_exit_fs) |