Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ac27a0ec | 2 | /* |
617ba13b | 3 | * linux/fs/ext4/inode.c |
ac27a0ec DK |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994, 1995 | |
6 | * Remy Card (card@masi.ibp.fr) | |
7 | * Laboratoire MASI - Institut Blaise Pascal | |
8 | * Universite Pierre et Marie Curie (Paris VI) | |
9 | * | |
10 | * from | |
11 | * | |
12 | * linux/fs/minix/inode.c | |
13 | * | |
14 | * Copyright (C) 1991, 1992 Linus Torvalds | |
15 | * | |
ac27a0ec DK |
16 | * 64-bit file support on 64-bit platforms by Jakub Jelinek |
17 | * (jj@sunsite.ms.mff.cuni.cz) | |
18 | * | |
617ba13b | 19 | * Assorted race fixes, rewrite of ext4_get_block() by Al Viro, 2000 |
ac27a0ec DK |
20 | */ |
21 | ||
ac27a0ec | 22 | #include <linux/fs.h> |
14f3db55 | 23 | #include <linux/mount.h> |
ac27a0ec | 24 | #include <linux/time.h> |
ac27a0ec DK |
25 | #include <linux/highuid.h> |
26 | #include <linux/pagemap.h> | |
c94c2acf | 27 | #include <linux/dax.h> |
ac27a0ec DK |
28 | #include <linux/quotaops.h> |
29 | #include <linux/string.h> | |
30 | #include <linux/buffer_head.h> | |
31 | #include <linux/writeback.h> | |
64769240 | 32 | #include <linux/pagevec.h> |
ac27a0ec | 33 | #include <linux/mpage.h> |
e83c1397 | 34 | #include <linux/namei.h> |
ac27a0ec DK |
35 | #include <linux/uio.h> |
36 | #include <linux/bio.h> | |
4c0425ff | 37 | #include <linux/workqueue.h> |
744692dc | 38 | #include <linux/kernel.h> |
6db26ffc | 39 | #include <linux/printk.h> |
5a0e3ad6 | 40 | #include <linux/slab.h> |
00a1a053 | 41 | #include <linux/bitops.h> |
364443cb | 42 | #include <linux/iomap.h> |
ae5e165d | 43 | #include <linux/iversion.h> |
9bffad1e | 44 | |
3dcf5451 | 45 | #include "ext4_jbd2.h" |
ac27a0ec DK |
46 | #include "xattr.h" |
47 | #include "acl.h" | |
9f125d64 | 48 | #include "truncate.h" |
ac27a0ec | 49 | |
9bffad1e TT |
50 | #include <trace/events/ext4.h> |
51 | ||
814525f4 DW |
52 | static __u32 ext4_inode_csum(struct inode *inode, struct ext4_inode *raw, |
53 | struct ext4_inode_info *ei) | |
54 | { | |
55 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
814525f4 | 56 | __u32 csum; |
b47820ed DJ |
57 | __u16 dummy_csum = 0; |
58 | int offset = offsetof(struct ext4_inode, i_checksum_lo); | |
59 | unsigned int csum_size = sizeof(dummy_csum); | |
814525f4 | 60 | |
b47820ed DJ |
61 | csum = ext4_chksum(sbi, ei->i_csum_seed, (__u8 *)raw, offset); |
62 | csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, csum_size); | |
63 | offset += csum_size; | |
64 | csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset, | |
65 | EXT4_GOOD_OLD_INODE_SIZE - offset); | |
814525f4 | 66 | |
b47820ed DJ |
67 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { |
68 | offset = offsetof(struct ext4_inode, i_checksum_hi); | |
69 | csum = ext4_chksum(sbi, csum, (__u8 *)raw + | |
70 | EXT4_GOOD_OLD_INODE_SIZE, | |
71 | offset - EXT4_GOOD_OLD_INODE_SIZE); | |
72 | if (EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) { | |
73 | csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum, | |
74 | csum_size); | |
75 | offset += csum_size; | |
b47820ed | 76 | } |
05ac5aa1 DJ |
77 | csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset, |
78 | EXT4_INODE_SIZE(inode->i_sb) - offset); | |
814525f4 DW |
79 | } |
80 | ||
814525f4 DW |
81 | return csum; |
82 | } | |
83 | ||
84 | static int ext4_inode_csum_verify(struct inode *inode, struct ext4_inode *raw, | |
85 | struct ext4_inode_info *ei) | |
86 | { | |
87 | __u32 provided, calculated; | |
88 | ||
89 | if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != | |
90 | cpu_to_le32(EXT4_OS_LINUX) || | |
9aa5d32b | 91 | !ext4_has_metadata_csum(inode->i_sb)) |
814525f4 DW |
92 | return 1; |
93 | ||
94 | provided = le16_to_cpu(raw->i_checksum_lo); | |
95 | calculated = ext4_inode_csum(inode, raw, ei); | |
96 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE && | |
97 | EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) | |
98 | provided |= ((__u32)le16_to_cpu(raw->i_checksum_hi)) << 16; | |
99 | else | |
100 | calculated &= 0xFFFF; | |
101 | ||
102 | return provided == calculated; | |
103 | } | |
104 | ||
8016e29f HS |
105 | void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw, |
106 | struct ext4_inode_info *ei) | |
814525f4 DW |
107 | { |
108 | __u32 csum; | |
109 | ||
110 | if (EXT4_SB(inode->i_sb)->s_es->s_creator_os != | |
111 | cpu_to_le32(EXT4_OS_LINUX) || | |
9aa5d32b | 112 | !ext4_has_metadata_csum(inode->i_sb)) |
814525f4 DW |
113 | return; |
114 | ||
115 | csum = ext4_inode_csum(inode, raw, ei); | |
116 | raw->i_checksum_lo = cpu_to_le16(csum & 0xFFFF); | |
117 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE && | |
118 | EXT4_FITS_IN_INODE(raw, ei, i_checksum_hi)) | |
119 | raw->i_checksum_hi = cpu_to_le16(csum >> 16); | |
120 | } | |
121 | ||
678aaf48 JK |
122 | static inline int ext4_begin_ordered_truncate(struct inode *inode, |
123 | loff_t new_size) | |
124 | { | |
7ff9c073 | 125 | trace_ext4_begin_ordered_truncate(inode, new_size); |
8aefcd55 TT |
126 | /* |
127 | * If jinode is zero, then we never opened the file for | |
128 | * writing, so there's no need to call | |
129 | * jbd2_journal_begin_ordered_truncate() since there's no | |
130 | * outstanding writes we need to flush. | |
131 | */ | |
132 | if (!EXT4_I(inode)->jinode) | |
133 | return 0; | |
134 | return jbd2_journal_begin_ordered_truncate(EXT4_JOURNAL(inode), | |
135 | EXT4_I(inode)->jinode, | |
136 | new_size); | |
678aaf48 JK |
137 | } |
138 | ||
dec214d0 TE |
139 | static int ext4_meta_trans_blocks(struct inode *inode, int lblocks, |
140 | int pextents); | |
64769240 | 141 | |
ac27a0ec DK |
142 | /* |
143 | * Test whether an inode is a fast symlink. | |
407cd7fb | 144 | * A fast symlink has its symlink data stored in ext4_inode_info->i_data. |
ac27a0ec | 145 | */ |
f348c252 | 146 | int ext4_inode_is_fast_symlink(struct inode *inode) |
ac27a0ec | 147 | { |
fc82228a AK |
148 | if (!(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) { |
149 | int ea_blocks = EXT4_I(inode)->i_file_acl ? | |
150 | EXT4_CLUSTER_SIZE(inode->i_sb) >> 9 : 0; | |
151 | ||
152 | if (ext4_has_inline_data(inode)) | |
153 | return 0; | |
154 | ||
155 | return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0); | |
156 | } | |
407cd7fb TE |
157 | return S_ISLNK(inode->i_mode) && inode->i_size && |
158 | (inode->i_size < EXT4_N_BLOCKS * 4); | |
ac27a0ec DK |
159 | } |
160 | ||
ac27a0ec DK |
161 | /* |
162 | * Called at the last iput() if i_nlink is zero. | |
163 | */ | |
0930fcc1 | 164 | void ext4_evict_inode(struct inode *inode) |
ac27a0ec DK |
165 | { |
166 | handle_t *handle; | |
bc965ab3 | 167 | int err; |
65db869c JK |
168 | /* |
169 | * Credits for final inode cleanup and freeing: | |
170 | * sb + inode (ext4_orphan_del()), block bitmap, group descriptor | |
171 | * (xattr block freeing), bitmap, group descriptor (inode freeing) | |
172 | */ | |
173 | int extra_credits = 6; | |
0421a189 | 174 | struct ext4_xattr_inode_array *ea_inode_array = NULL; |
46e294ef | 175 | bool freeze_protected = false; |
ac27a0ec | 176 | |
7ff9c073 | 177 | trace_ext4_evict_inode(inode); |
2581fdc8 | 178 | |
6bc0d63d JK |
179 | if (EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL) |
180 | ext4_evict_ea_inode(inode); | |
0930fcc1 | 181 | if (inode->i_nlink) { |
91b0abe3 | 182 | truncate_inode_pages_final(&inode->i_data); |
5dc23bdd | 183 | |
0930fcc1 AV |
184 | goto no_delete; |
185 | } | |
186 | ||
e2bfb088 TT |
187 | if (is_bad_inode(inode)) |
188 | goto no_delete; | |
189 | dquot_initialize(inode); | |
907f4554 | 190 | |
678aaf48 JK |
191 | if (ext4_should_order_data(inode)) |
192 | ext4_begin_ordered_truncate(inode, 0); | |
91b0abe3 | 193 | truncate_inode_pages_final(&inode->i_data); |
ac27a0ec | 194 | |
ceff86fd JK |
195 | /* |
196 | * For inodes with journalled data, transaction commit could have | |
bc12ac98 ZY |
197 | * dirtied the inode. And for inodes with dioread_nolock, unwritten |
198 | * extents converting worker could merge extents and also have dirtied | |
199 | * the inode. Flush worker is ignoring it because of I_FREEING flag but | |
200 | * we still need to remove the inode from the writeback lists. | |
ceff86fd | 201 | */ |
bc12ac98 | 202 | if (!list_empty_careful(&inode->i_io_list)) |
ceff86fd | 203 | inode_io_list_del(inode); |
ceff86fd | 204 | |
8e8ad8a5 JK |
205 | /* |
206 | * Protect us against freezing - iput() caller didn't have to have any | |
46e294ef JK |
207 | * protection against it. When we are in a running transaction though, |
208 | * we are already protected against freezing and we cannot grab further | |
209 | * protection due to lock ordering constraints. | |
8e8ad8a5 | 210 | */ |
46e294ef JK |
211 | if (!ext4_journal_current_handle()) { |
212 | sb_start_intwrite(inode->i_sb); | |
213 | freeze_protected = true; | |
214 | } | |
e50e5129 | 215 | |
30a7eb97 TE |
216 | if (!IS_NOQUOTA(inode)) |
217 | extra_credits += EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb); | |
218 | ||
65db869c JK |
219 | /* |
220 | * Block bitmap, group descriptor, and inode are accounted in both | |
221 | * ext4_blocks_for_truncate() and extra_credits. So subtract 3. | |
222 | */ | |
30a7eb97 | 223 | handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, |
65db869c | 224 | ext4_blocks_for_truncate(inode) + extra_credits - 3); |
ac27a0ec | 225 | if (IS_ERR(handle)) { |
bc965ab3 | 226 | ext4_std_error(inode->i_sb, PTR_ERR(handle)); |
ac27a0ec DK |
227 | /* |
228 | * If we're going to skip the normal cleanup, we still need to | |
229 | * make sure that the in-core orphan linked list is properly | |
230 | * cleaned up. | |
231 | */ | |
617ba13b | 232 | ext4_orphan_del(NULL, inode); |
46e294ef JK |
233 | if (freeze_protected) |
234 | sb_end_intwrite(inode->i_sb); | |
ac27a0ec DK |
235 | goto no_delete; |
236 | } | |
30a7eb97 | 237 | |
ac27a0ec | 238 | if (IS_SYNC(inode)) |
0390131b | 239 | ext4_handle_sync(handle); |
407cd7fb TE |
240 | |
241 | /* | |
242 | * Set inode->i_size to 0 before calling ext4_truncate(). We need | |
243 | * special handling of symlinks here because i_size is used to | |
244 | * determine whether ext4_inode_info->i_data contains symlink data or | |
245 | * block mappings. Setting i_size to 0 will remove its fast symlink | |
246 | * status. Erase i_data so that it becomes a valid empty block map. | |
247 | */ | |
248 | if (ext4_inode_is_fast_symlink(inode)) | |
249 | memset(EXT4_I(inode)->i_data, 0, sizeof(EXT4_I(inode)->i_data)); | |
ac27a0ec | 250 | inode->i_size = 0; |
bc965ab3 TT |
251 | err = ext4_mark_inode_dirty(handle, inode); |
252 | if (err) { | |
12062ddd | 253 | ext4_warning(inode->i_sb, |
bc965ab3 TT |
254 | "couldn't mark inode dirty (err %d)", err); |
255 | goto stop_handle; | |
256 | } | |
2c98eb5e TT |
257 | if (inode->i_blocks) { |
258 | err = ext4_truncate(inode); | |
259 | if (err) { | |
54d3adbc TT |
260 | ext4_error_err(inode->i_sb, -err, |
261 | "couldn't truncate inode %lu (err %d)", | |
262 | inode->i_ino, err); | |
2c98eb5e TT |
263 | goto stop_handle; |
264 | } | |
265 | } | |
bc965ab3 | 266 | |
30a7eb97 TE |
267 | /* Remove xattr references. */ |
268 | err = ext4_xattr_delete_inode(handle, inode, &ea_inode_array, | |
269 | extra_credits); | |
270 | if (err) { | |
271 | ext4_warning(inode->i_sb, "xattr delete (err %d)", err); | |
272 | stop_handle: | |
273 | ext4_journal_stop(handle); | |
274 | ext4_orphan_del(NULL, inode); | |
46e294ef JK |
275 | if (freeze_protected) |
276 | sb_end_intwrite(inode->i_sb); | |
30a7eb97 TE |
277 | ext4_xattr_inode_array_free(ea_inode_array); |
278 | goto no_delete; | |
bc965ab3 TT |
279 | } |
280 | ||
ac27a0ec | 281 | /* |
617ba13b | 282 | * Kill off the orphan record which ext4_truncate created. |
ac27a0ec | 283 | * AKPM: I think this can be inside the above `if'. |
617ba13b | 284 | * Note that ext4_orphan_del() has to be able to cope with the |
ac27a0ec | 285 | * deletion of a non-existent orphan - this is because we don't |
617ba13b | 286 | * know if ext4_truncate() actually created an orphan record. |
ac27a0ec DK |
287 | * (Well, we could do this if we need to, but heck - it works) |
288 | */ | |
617ba13b | 289 | ext4_orphan_del(handle, inode); |
5ffff834 | 290 | EXT4_I(inode)->i_dtime = (__u32)ktime_get_real_seconds(); |
ac27a0ec DK |
291 | |
292 | /* | |
293 | * One subtle ordering requirement: if anything has gone wrong | |
294 | * (transaction abort, IO errors, whatever), then we can still | |
295 | * do these next steps (the fs will already have been marked as | |
296 | * having errors), but we can't free the inode if the mark_dirty | |
297 | * fails. | |
298 | */ | |
617ba13b | 299 | if (ext4_mark_inode_dirty(handle, inode)) |
ac27a0ec | 300 | /* If that failed, just do the required in-core inode clear. */ |
0930fcc1 | 301 | ext4_clear_inode(inode); |
ac27a0ec | 302 | else |
617ba13b MC |
303 | ext4_free_inode(handle, inode); |
304 | ext4_journal_stop(handle); | |
46e294ef JK |
305 | if (freeze_protected) |
306 | sb_end_intwrite(inode->i_sb); | |
0421a189 | 307 | ext4_xattr_inode_array_free(ea_inode_array); |
ac27a0ec DK |
308 | return; |
309 | no_delete: | |
318cdc82 ZY |
310 | /* |
311 | * Check out some where else accidentally dirty the evicting inode, | |
312 | * which may probably cause inode use-after-free issues later. | |
313 | */ | |
314 | WARN_ON_ONCE(!list_empty_careful(&inode->i_io_list)); | |
315 | ||
b21ebf14 | 316 | if (!list_empty(&EXT4_I(inode)->i_fc_list)) |
e85c81ba | 317 | ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_NOMEM, NULL); |
0930fcc1 | 318 | ext4_clear_inode(inode); /* We must guarantee clearing of inode... */ |
ac27a0ec DK |
319 | } |
320 | ||
a9e7f447 DM |
321 | #ifdef CONFIG_QUOTA |
322 | qsize_t *ext4_get_reserved_space(struct inode *inode) | |
60e58e0f | 323 | { |
a9e7f447 | 324 | return &EXT4_I(inode)->i_reserved_quota; |
60e58e0f | 325 | } |
a9e7f447 | 326 | #endif |
9d0be502 | 327 | |
0637c6f4 TT |
328 | /* |
329 | * Called with i_data_sem down, which is important since we can call | |
330 | * ext4_discard_preallocations() from here. | |
331 | */ | |
5f634d06 AK |
332 | void ext4_da_update_reserve_space(struct inode *inode, |
333 | int used, int quota_claim) | |
12219aea AK |
334 | { |
335 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
0637c6f4 | 336 | struct ext4_inode_info *ei = EXT4_I(inode); |
0637c6f4 TT |
337 | |
338 | spin_lock(&ei->i_block_reservation_lock); | |
d8990240 | 339 | trace_ext4_da_update_reserve_space(inode, used, quota_claim); |
0637c6f4 | 340 | if (unlikely(used > ei->i_reserved_data_blocks)) { |
8de5c325 | 341 | ext4_warning(inode->i_sb, "%s: ino %lu, used %d " |
1084f252 | 342 | "with only %d reserved data blocks", |
0637c6f4 TT |
343 | __func__, inode->i_ino, used, |
344 | ei->i_reserved_data_blocks); | |
345 | WARN_ON(1); | |
346 | used = ei->i_reserved_data_blocks; | |
347 | } | |
12219aea | 348 | |
0637c6f4 TT |
349 | /* Update per-inode reservations */ |
350 | ei->i_reserved_data_blocks -= used; | |
71d4f7d0 | 351 | percpu_counter_sub(&sbi->s_dirtyclusters_counter, used); |
6bc6e63f | 352 | |
f9505c72 | 353 | spin_unlock(&ei->i_block_reservation_lock); |
60e58e0f | 354 | |
72b8ab9d ES |
355 | /* Update quota subsystem for data blocks */ |
356 | if (quota_claim) | |
7b415bf6 | 357 | dquot_claim_block(inode, EXT4_C2B(sbi, used)); |
72b8ab9d | 358 | else { |
5f634d06 AK |
359 | /* |
360 | * We did fallocate with an offset that is already delayed | |
361 | * allocated. So on delayed allocated writeback we should | |
72b8ab9d | 362 | * not re-claim the quota for fallocated blocks. |
5f634d06 | 363 | */ |
7b415bf6 | 364 | dquot_release_reservation_block(inode, EXT4_C2B(sbi, used)); |
5f634d06 | 365 | } |
d6014301 AK |
366 | |
367 | /* | |
368 | * If we have done all the pending block allocations and if | |
369 | * there aren't any writers on the inode, we can discard the | |
370 | * inode's preallocations. | |
371 | */ | |
0637c6f4 | 372 | if ((ei->i_reserved_data_blocks == 0) && |
82dd124c | 373 | !inode_is_open_for_write(inode)) |
2ffd2a6a | 374 | ext4_discard_preallocations(inode); |
12219aea AK |
375 | } |
376 | ||
e29136f8 | 377 | static int __check_block_validity(struct inode *inode, const char *func, |
c398eda0 TT |
378 | unsigned int line, |
379 | struct ext4_map_blocks *map) | |
6fd058f7 | 380 | { |
345c0dbf TT |
381 | if (ext4_has_feature_journal(inode->i_sb) && |
382 | (inode->i_ino == | |
383 | le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum))) | |
384 | return 0; | |
ce9f24cc | 385 | if (!ext4_inode_block_valid(inode, map->m_pblk, map->m_len)) { |
c398eda0 | 386 | ext4_error_inode(inode, func, line, map->m_pblk, |
bdbd6ce0 | 387 | "lblock %lu mapped to illegal pblock %llu " |
c398eda0 | 388 | "(length %d)", (unsigned long) map->m_lblk, |
bdbd6ce0 | 389 | map->m_pblk, map->m_len); |
6a797d27 | 390 | return -EFSCORRUPTED; |
6fd058f7 TT |
391 | } |
392 | return 0; | |
393 | } | |
394 | ||
53085fac JK |
395 | int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk, |
396 | ext4_lblk_t len) | |
397 | { | |
398 | int ret; | |
399 | ||
33b4cc25 | 400 | if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) |
a7550b30 | 401 | return fscrypt_zeroout_range(inode, lblk, pblk, len); |
53085fac JK |
402 | |
403 | ret = sb_issue_zeroout(inode->i_sb, pblk, len, GFP_NOFS); | |
404 | if (ret > 0) | |
405 | ret = 0; | |
406 | ||
407 | return ret; | |
408 | } | |
409 | ||
e29136f8 | 410 | #define check_block_validity(inode, map) \ |
c398eda0 | 411 | __check_block_validity((inode), __func__, __LINE__, (map)) |
e29136f8 | 412 | |
921f266b DM |
413 | #ifdef ES_AGGRESSIVE_TEST |
414 | static void ext4_map_blocks_es_recheck(handle_t *handle, | |
415 | struct inode *inode, | |
416 | struct ext4_map_blocks *es_map, | |
417 | struct ext4_map_blocks *map, | |
418 | int flags) | |
419 | { | |
420 | int retval; | |
421 | ||
422 | map->m_flags = 0; | |
423 | /* | |
424 | * There is a race window that the result is not the same. | |
425 | * e.g. xfstests #223 when dioread_nolock enables. The reason | |
426 | * is that we lookup a block mapping in extent status tree with | |
427 | * out taking i_data_sem. So at the time the unwritten extent | |
428 | * could be converted. | |
429 | */ | |
2dcba478 | 430 | down_read(&EXT4_I(inode)->i_data_sem); |
921f266b | 431 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { |
9e52484c | 432 | retval = ext4_ext_map_blocks(handle, inode, map, 0); |
921f266b | 433 | } else { |
9e52484c | 434 | retval = ext4_ind_map_blocks(handle, inode, map, 0); |
921f266b | 435 | } |
2dcba478 | 436 | up_read((&EXT4_I(inode)->i_data_sem)); |
921f266b DM |
437 | |
438 | /* | |
439 | * We don't check m_len because extent will be collpased in status | |
440 | * tree. So the m_len might not equal. | |
441 | */ | |
442 | if (es_map->m_lblk != map->m_lblk || | |
443 | es_map->m_flags != map->m_flags || | |
444 | es_map->m_pblk != map->m_pblk) { | |
bdafe42a | 445 | printk("ES cache assertion failed for inode: %lu " |
921f266b DM |
446 | "es_cached ex [%d/%d/%llu/%x] != " |
447 | "found ex [%d/%d/%llu/%x] retval %d flags %x\n", | |
448 | inode->i_ino, es_map->m_lblk, es_map->m_len, | |
449 | es_map->m_pblk, es_map->m_flags, map->m_lblk, | |
450 | map->m_len, map->m_pblk, map->m_flags, | |
451 | retval, flags); | |
452 | } | |
453 | } | |
454 | #endif /* ES_AGGRESSIVE_TEST */ | |
455 | ||
f5ab0d1f | 456 | /* |
e35fd660 | 457 | * The ext4_map_blocks() function tries to look up the requested blocks, |
2b2d6d01 | 458 | * and returns if the blocks are already mapped. |
f5ab0d1f | 459 | * |
f5ab0d1f MC |
460 | * Otherwise it takes the write lock of the i_data_sem and allocate blocks |
461 | * and store the allocated blocks in the result buffer head and mark it | |
462 | * mapped. | |
463 | * | |
e35fd660 TT |
464 | * If file type is extents based, it will call ext4_ext_map_blocks(), |
465 | * Otherwise, call with ext4_ind_map_blocks() to handle indirect mapping | |
f5ab0d1f MC |
466 | * based files |
467 | * | |
facab4d9 JK |
468 | * On success, it returns the number of blocks being mapped or allocated. if |
469 | * create==0 and the blocks are pre-allocated and unwritten, the resulting @map | |
470 | * is marked as unwritten. If the create == 1, it will mark @map as mapped. | |
f5ab0d1f MC |
471 | * |
472 | * It returns 0 if plain look up failed (blocks have not been allocated), in | |
facab4d9 JK |
473 | * that case, @map is returned as unmapped but we still do fill map->m_len to |
474 | * indicate the length of a hole starting at map->m_lblk. | |
f5ab0d1f MC |
475 | * |
476 | * It returns the error in case of allocation failure. | |
477 | */ | |
e35fd660 TT |
478 | int ext4_map_blocks(handle_t *handle, struct inode *inode, |
479 | struct ext4_map_blocks *map, int flags) | |
0e855ac8 | 480 | { |
d100eef2 | 481 | struct extent_status es; |
0e855ac8 | 482 | int retval; |
b8a86845 | 483 | int ret = 0; |
921f266b DM |
484 | #ifdef ES_AGGRESSIVE_TEST |
485 | struct ext4_map_blocks orig_map; | |
486 | ||
487 | memcpy(&orig_map, map, sizeof(*map)); | |
488 | #endif | |
f5ab0d1f | 489 | |
e35fd660 | 490 | map->m_flags = 0; |
70aa1554 RH |
491 | ext_debug(inode, "flag 0x%x, max_blocks %u, logical block %lu\n", |
492 | flags, map->m_len, (unsigned long) map->m_lblk); | |
d100eef2 | 493 | |
e861b5e9 TT |
494 | /* |
495 | * ext4_map_blocks returns an int, and m_len is an unsigned int | |
496 | */ | |
497 | if (unlikely(map->m_len > INT_MAX)) | |
498 | map->m_len = INT_MAX; | |
499 | ||
4adb6ab3 KM |
500 | /* We can handle the block number less than EXT_MAX_BLOCKS */ |
501 | if (unlikely(map->m_lblk >= EXT_MAX_BLOCKS)) | |
6a797d27 | 502 | return -EFSCORRUPTED; |
4adb6ab3 | 503 | |
d100eef2 | 504 | /* Lookup extent status tree firstly */ |
8016e29f HS |
505 | if (!(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY) && |
506 | ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es)) { | |
d100eef2 ZL |
507 | if (ext4_es_is_written(&es) || ext4_es_is_unwritten(&es)) { |
508 | map->m_pblk = ext4_es_pblock(&es) + | |
509 | map->m_lblk - es.es_lblk; | |
510 | map->m_flags |= ext4_es_is_written(&es) ? | |
511 | EXT4_MAP_MAPPED : EXT4_MAP_UNWRITTEN; | |
512 | retval = es.es_len - (map->m_lblk - es.es_lblk); | |
513 | if (retval > map->m_len) | |
514 | retval = map->m_len; | |
515 | map->m_len = retval; | |
516 | } else if (ext4_es_is_delayed(&es) || ext4_es_is_hole(&es)) { | |
facab4d9 | 517 | map->m_pblk = 0; |
874eaba9 ZY |
518 | map->m_flags |= ext4_es_is_delayed(&es) ? |
519 | EXT4_MAP_DELAYED : 0; | |
facab4d9 JK |
520 | retval = es.es_len - (map->m_lblk - es.es_lblk); |
521 | if (retval > map->m_len) | |
522 | retval = map->m_len; | |
523 | map->m_len = retval; | |
d100eef2 ZL |
524 | retval = 0; |
525 | } else { | |
1e83bc81 | 526 | BUG(); |
d100eef2 | 527 | } |
9558cf14 ZY |
528 | |
529 | if (flags & EXT4_GET_BLOCKS_CACHED_NOWAIT) | |
530 | return retval; | |
921f266b DM |
531 | #ifdef ES_AGGRESSIVE_TEST |
532 | ext4_map_blocks_es_recheck(handle, inode, map, | |
533 | &orig_map, flags); | |
534 | #endif | |
d100eef2 ZL |
535 | goto found; |
536 | } | |
9558cf14 ZY |
537 | /* |
538 | * In the query cache no-wait mode, nothing we can do more if we | |
539 | * cannot find extent in the cache. | |
540 | */ | |
541 | if (flags & EXT4_GET_BLOCKS_CACHED_NOWAIT) | |
542 | return 0; | |
d100eef2 | 543 | |
4df3d265 | 544 | /* |
b920c755 TT |
545 | * Try to see if we can get the block without requesting a new |
546 | * file system block. | |
4df3d265 | 547 | */ |
2dcba478 | 548 | down_read(&EXT4_I(inode)->i_data_sem); |
12e9b892 | 549 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { |
9e52484c | 550 | retval = ext4_ext_map_blocks(handle, inode, map, 0); |
0e855ac8 | 551 | } else { |
9e52484c | 552 | retval = ext4_ind_map_blocks(handle, inode, map, 0); |
0e855ac8 | 553 | } |
f7fec032 | 554 | if (retval > 0) { |
3be78c73 | 555 | unsigned int status; |
f7fec032 | 556 | |
44fb851d ZL |
557 | if (unlikely(retval != map->m_len)) { |
558 | ext4_warning(inode->i_sb, | |
559 | "ES len assertion failed for inode " | |
560 | "%lu: retval %d != map->m_len %d", | |
561 | inode->i_ino, retval, map->m_len); | |
562 | WARN_ON(1); | |
921f266b | 563 | } |
921f266b | 564 | |
f7fec032 ZL |
565 | status = map->m_flags & EXT4_MAP_UNWRITTEN ? |
566 | EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; | |
567 | if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && | |
d2dc317d | 568 | !(status & EXTENT_STATUS_WRITTEN) && |
ad431025 EW |
569 | ext4_es_scan_range(inode, &ext4_es_is_delayed, map->m_lblk, |
570 | map->m_lblk + map->m_len - 1)) | |
f7fec032 | 571 | status |= EXTENT_STATUS_DELAYED; |
6c120399 BL |
572 | ext4_es_insert_extent(inode, map->m_lblk, map->m_len, |
573 | map->m_pblk, status); | |
f7fec032 | 574 | } |
2dcba478 | 575 | up_read((&EXT4_I(inode)->i_data_sem)); |
f5ab0d1f | 576 | |
d100eef2 | 577 | found: |
e35fd660 | 578 | if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { |
b8a86845 | 579 | ret = check_block_validity(inode, map); |
6fd058f7 TT |
580 | if (ret != 0) |
581 | return ret; | |
582 | } | |
583 | ||
f5ab0d1f | 584 | /* If it is only a block(s) look up */ |
c2177057 | 585 | if ((flags & EXT4_GET_BLOCKS_CREATE) == 0) |
f5ab0d1f MC |
586 | return retval; |
587 | ||
588 | /* | |
589 | * Returns if the blocks have already allocated | |
590 | * | |
591 | * Note that if blocks have been preallocated | |
df3ab170 | 592 | * ext4_ext_get_block() returns the create = 0 |
f5ab0d1f MC |
593 | * with buffer head unmapped. |
594 | */ | |
e35fd660 | 595 | if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) |
b8a86845 LC |
596 | /* |
597 | * If we need to convert extent to unwritten | |
598 | * we continue and do the actual work in | |
599 | * ext4_ext_map_blocks() | |
600 | */ | |
601 | if (!(flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN)) | |
602 | return retval; | |
4df3d265 | 603 | |
2a8964d6 | 604 | /* |
a25a4e1a ZL |
605 | * Here we clear m_flags because after allocating an new extent, |
606 | * it will be set again. | |
2a8964d6 | 607 | */ |
a25a4e1a | 608 | map->m_flags &= ~EXT4_MAP_FLAGS; |
2a8964d6 | 609 | |
4df3d265 | 610 | /* |
556615dc | 611 | * New blocks allocate and/or writing to unwritten extent |
f5ab0d1f | 612 | * will possibly result in updating i_data, so we take |
d91bd2c1 | 613 | * the write lock of i_data_sem, and call get_block() |
f5ab0d1f | 614 | * with create == 1 flag. |
4df3d265 | 615 | */ |
c8b459f4 | 616 | down_write(&EXT4_I(inode)->i_data_sem); |
d2a17637 | 617 | |
4df3d265 AK |
618 | /* |
619 | * We need to check for EXT4 here because migrate | |
620 | * could have changed the inode type in between | |
621 | */ | |
12e9b892 | 622 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) { |
e35fd660 | 623 | retval = ext4_ext_map_blocks(handle, inode, map, flags); |
0e855ac8 | 624 | } else { |
e35fd660 | 625 | retval = ext4_ind_map_blocks(handle, inode, map, flags); |
267e4db9 | 626 | |
e35fd660 | 627 | if (retval > 0 && map->m_flags & EXT4_MAP_NEW) { |
267e4db9 AK |
628 | /* |
629 | * We allocated new blocks which will result in | |
630 | * i_data's format changing. Force the migrate | |
631 | * to fail by clearing migrate flags | |
632 | */ | |
19f5fb7a | 633 | ext4_clear_inode_state(inode, EXT4_STATE_EXT_MIGRATE); |
267e4db9 | 634 | } |
5f634d06 | 635 | } |
2ac3b6e0 | 636 | |
f7fec032 | 637 | if (retval > 0) { |
3be78c73 | 638 | unsigned int status; |
f7fec032 | 639 | |
44fb851d ZL |
640 | if (unlikely(retval != map->m_len)) { |
641 | ext4_warning(inode->i_sb, | |
642 | "ES len assertion failed for inode " | |
643 | "%lu: retval %d != map->m_len %d", | |
644 | inode->i_ino, retval, map->m_len); | |
645 | WARN_ON(1); | |
921f266b | 646 | } |
921f266b | 647 | |
c86d8db3 JK |
648 | /* |
649 | * We have to zeroout blocks before inserting them into extent | |
650 | * status tree. Otherwise someone could look them up there and | |
9b623df6 JK |
651 | * use them before they are really zeroed. We also have to |
652 | * unmap metadata before zeroing as otherwise writeback can | |
653 | * overwrite zeros with stale data from block device. | |
c86d8db3 JK |
654 | */ |
655 | if (flags & EXT4_GET_BLOCKS_ZERO && | |
656 | map->m_flags & EXT4_MAP_MAPPED && | |
657 | map->m_flags & EXT4_MAP_NEW) { | |
658 | ret = ext4_issue_zeroout(inode, map->m_lblk, | |
659 | map->m_pblk, map->m_len); | |
660 | if (ret) { | |
661 | retval = ret; | |
662 | goto out_sem; | |
663 | } | |
664 | } | |
665 | ||
adb23551 ZL |
666 | /* |
667 | * If the extent has been zeroed out, we don't need to update | |
668 | * extent status tree. | |
669 | */ | |
670 | if ((flags & EXT4_GET_BLOCKS_PRE_IO) && | |
bb5835ed | 671 | ext4_es_lookup_extent(inode, map->m_lblk, NULL, &es)) { |
adb23551 | 672 | if (ext4_es_is_written(&es)) |
c86d8db3 | 673 | goto out_sem; |
adb23551 | 674 | } |
f7fec032 ZL |
675 | status = map->m_flags & EXT4_MAP_UNWRITTEN ? |
676 | EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; | |
677 | if (!(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) && | |
d2dc317d | 678 | !(status & EXTENT_STATUS_WRITTEN) && |
ad431025 EW |
679 | ext4_es_scan_range(inode, &ext4_es_is_delayed, map->m_lblk, |
680 | map->m_lblk + map->m_len - 1)) | |
f7fec032 | 681 | status |= EXTENT_STATUS_DELAYED; |
6c120399 BL |
682 | ext4_es_insert_extent(inode, map->m_lblk, map->m_len, |
683 | map->m_pblk, status); | |
5356f261 AK |
684 | } |
685 | ||
c86d8db3 | 686 | out_sem: |
4df3d265 | 687 | up_write((&EXT4_I(inode)->i_data_sem)); |
e35fd660 | 688 | if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) { |
b8a86845 | 689 | ret = check_block_validity(inode, map); |
6fd058f7 TT |
690 | if (ret != 0) |
691 | return ret; | |
06bd3c36 JK |
692 | |
693 | /* | |
694 | * Inodes with freshly allocated blocks where contents will be | |
695 | * visible after transaction commit must be on transaction's | |
696 | * ordered data list. | |
697 | */ | |
698 | if (map->m_flags & EXT4_MAP_NEW && | |
699 | !(map->m_flags & EXT4_MAP_UNWRITTEN) && | |
700 | !(flags & EXT4_GET_BLOCKS_ZERO) && | |
02749a4c | 701 | !ext4_is_quota_file(inode) && |
06bd3c36 | 702 | ext4_should_order_data(inode)) { |
73131fbb RZ |
703 | loff_t start_byte = |
704 | (loff_t)map->m_lblk << inode->i_blkbits; | |
705 | loff_t length = (loff_t)map->m_len << inode->i_blkbits; | |
706 | ||
ee0876bc | 707 | if (flags & EXT4_GET_BLOCKS_IO_SUBMIT) |
73131fbb RZ |
708 | ret = ext4_jbd2_inode_add_wait(handle, inode, |
709 | start_byte, length); | |
ee0876bc | 710 | else |
73131fbb RZ |
711 | ret = ext4_jbd2_inode_add_write(handle, inode, |
712 | start_byte, length); | |
06bd3c36 JK |
713 | if (ret) |
714 | return ret; | |
715 | } | |
6fd058f7 | 716 | } |
5e4d0eba XY |
717 | if (retval > 0 && (map->m_flags & EXT4_MAP_UNWRITTEN || |
718 | map->m_flags & EXT4_MAP_MAPPED)) | |
719 | ext4_fc_track_range(handle, inode, map->m_lblk, | |
720 | map->m_lblk + map->m_len - 1); | |
ec8c60be | 721 | if (retval < 0) |
70aa1554 | 722 | ext_debug(inode, "failed with err %d\n", retval); |
0e855ac8 AK |
723 | return retval; |
724 | } | |
725 | ||
ed8ad838 JK |
726 | /* |
727 | * Update EXT4_MAP_FLAGS in bh->b_state. For buffer heads attached to pages | |
728 | * we have to be careful as someone else may be manipulating b_state as well. | |
729 | */ | |
730 | static void ext4_update_bh_state(struct buffer_head *bh, unsigned long flags) | |
731 | { | |
732 | unsigned long old_state; | |
733 | unsigned long new_state; | |
734 | ||
735 | flags &= EXT4_MAP_FLAGS; | |
736 | ||
737 | /* Dummy buffer_head? Set non-atomically. */ | |
738 | if (!bh->b_page) { | |
739 | bh->b_state = (bh->b_state & ~EXT4_MAP_FLAGS) | flags; | |
740 | return; | |
741 | } | |
742 | /* | |
743 | * Someone else may be modifying b_state. Be careful! This is ugly but | |
744 | * once we get rid of using bh as a container for mapping information | |
745 | * to pass to / from get_block functions, this can go away. | |
746 | */ | |
3ee2a3e7 | 747 | old_state = READ_ONCE(bh->b_state); |
ed8ad838 | 748 | do { |
ed8ad838 | 749 | new_state = (old_state & ~EXT4_MAP_FLAGS) | flags; |
3ee2a3e7 | 750 | } while (unlikely(!try_cmpxchg(&bh->b_state, &old_state, new_state))); |
ed8ad838 JK |
751 | } |
752 | ||
2ed88685 TT |
753 | static int _ext4_get_block(struct inode *inode, sector_t iblock, |
754 | struct buffer_head *bh, int flags) | |
ac27a0ec | 755 | { |
2ed88685 | 756 | struct ext4_map_blocks map; |
efe70c29 | 757 | int ret = 0; |
ac27a0ec | 758 | |
46c7f254 TM |
759 | if (ext4_has_inline_data(inode)) |
760 | return -ERANGE; | |
761 | ||
2ed88685 TT |
762 | map.m_lblk = iblock; |
763 | map.m_len = bh->b_size >> inode->i_blkbits; | |
764 | ||
efe70c29 JK |
765 | ret = ext4_map_blocks(ext4_journal_current_handle(), inode, &map, |
766 | flags); | |
7fb5409d | 767 | if (ret > 0) { |
2ed88685 | 768 | map_bh(bh, inode->i_sb, map.m_pblk); |
ed8ad838 | 769 | ext4_update_bh_state(bh, map.m_flags); |
2ed88685 | 770 | bh->b_size = inode->i_sb->s_blocksize * map.m_len; |
7fb5409d | 771 | ret = 0; |
547edce3 RZ |
772 | } else if (ret == 0) { |
773 | /* hole case, need to fill in bh->b_size */ | |
774 | bh->b_size = inode->i_sb->s_blocksize * map.m_len; | |
ac27a0ec DK |
775 | } |
776 | return ret; | |
777 | } | |
778 | ||
2ed88685 TT |
779 | int ext4_get_block(struct inode *inode, sector_t iblock, |
780 | struct buffer_head *bh, int create) | |
781 | { | |
782 | return _ext4_get_block(inode, iblock, bh, | |
783 | create ? EXT4_GET_BLOCKS_CREATE : 0); | |
784 | } | |
785 | ||
705965bd JK |
786 | /* |
787 | * Get block function used when preparing for buffered write if we require | |
788 | * creating an unwritten extent if blocks haven't been allocated. The extent | |
789 | * will be converted to written after the IO is complete. | |
790 | */ | |
791 | int ext4_get_block_unwritten(struct inode *inode, sector_t iblock, | |
792 | struct buffer_head *bh_result, int create) | |
793 | { | |
2cd8bdb5 OM |
794 | int ret = 0; |
795 | ||
705965bd JK |
796 | ext4_debug("ext4_get_block_unwritten: inode %lu, create flag %d\n", |
797 | inode->i_ino, create); | |
2cd8bdb5 | 798 | ret = _ext4_get_block(inode, iblock, bh_result, |
8d5459c1 | 799 | EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT); |
2cd8bdb5 OM |
800 | |
801 | /* | |
802 | * If the buffer is marked unwritten, mark it as new to make sure it is | |
803 | * zeroed out correctly in case of partial writes. Otherwise, there is | |
804 | * a chance of stale data getting exposed. | |
805 | */ | |
806 | if (ret == 0 && buffer_unwritten(bh_result)) | |
807 | set_buffer_new(bh_result); | |
808 | ||
809 | return ret; | |
705965bd JK |
810 | } |
811 | ||
efe70c29 JK |
812 | /* Maximum number of blocks we map for direct IO at once. */ |
813 | #define DIO_MAX_BLOCKS 4096 | |
814 | ||
ac27a0ec DK |
815 | /* |
816 | * `handle' can be NULL if create is zero | |
817 | */ | |
617ba13b | 818 | struct buffer_head *ext4_getblk(handle_t *handle, struct inode *inode, |
c5e298ae | 819 | ext4_lblk_t block, int map_flags) |
ac27a0ec | 820 | { |
2ed88685 TT |
821 | struct ext4_map_blocks map; |
822 | struct buffer_head *bh; | |
c5e298ae | 823 | int create = map_flags & EXT4_GET_BLOCKS_CREATE; |
9558cf14 | 824 | bool nowait = map_flags & EXT4_GET_BLOCKS_CACHED_NOWAIT; |
10560082 | 825 | int err; |
ac27a0ec | 826 | |
837c23fb CX |
827 | ASSERT((EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY) |
828 | || handle != NULL || create == 0); | |
9558cf14 | 829 | ASSERT(create == 0 || !nowait); |
ac27a0ec | 830 | |
2ed88685 TT |
831 | map.m_lblk = block; |
832 | map.m_len = 1; | |
c5e298ae | 833 | err = ext4_map_blocks(handle, inode, &map, map_flags); |
ac27a0ec | 834 | |
10560082 TT |
835 | if (err == 0) |
836 | return create ? ERR_PTR(-ENOSPC) : NULL; | |
2ed88685 | 837 | if (err < 0) |
10560082 | 838 | return ERR_PTR(err); |
2ed88685 | 839 | |
9558cf14 ZY |
840 | if (nowait) |
841 | return sb_find_get_block(inode->i_sb, map.m_pblk); | |
842 | ||
2ed88685 | 843 | bh = sb_getblk(inode->i_sb, map.m_pblk); |
10560082 TT |
844 | if (unlikely(!bh)) |
845 | return ERR_PTR(-ENOMEM); | |
2ed88685 | 846 | if (map.m_flags & EXT4_MAP_NEW) { |
837c23fb CX |
847 | ASSERT(create != 0); |
848 | ASSERT((EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY) | |
849 | || (handle != NULL)); | |
ac27a0ec | 850 | |
2ed88685 TT |
851 | /* |
852 | * Now that we do not always journal data, we should | |
853 | * keep in mind whether this should always journal the | |
854 | * new buffer as metadata. For now, regular file | |
855 | * writes use ext4_get_block instead, so it's not a | |
856 | * problem. | |
857 | */ | |
858 | lock_buffer(bh); | |
859 | BUFFER_TRACE(bh, "call get_create_access"); | |
188c299e JK |
860 | err = ext4_journal_get_create_access(handle, inode->i_sb, bh, |
861 | EXT4_JTR_NONE); | |
10560082 TT |
862 | if (unlikely(err)) { |
863 | unlock_buffer(bh); | |
864 | goto errout; | |
865 | } | |
866 | if (!buffer_uptodate(bh)) { | |
2ed88685 TT |
867 | memset(bh->b_data, 0, inode->i_sb->s_blocksize); |
868 | set_buffer_uptodate(bh); | |
ac27a0ec | 869 | } |
2ed88685 TT |
870 | unlock_buffer(bh); |
871 | BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); | |
872 | err = ext4_handle_dirty_metadata(handle, inode, bh); | |
10560082 TT |
873 | if (unlikely(err)) |
874 | goto errout; | |
875 | } else | |
2ed88685 | 876 | BUFFER_TRACE(bh, "not a new buffer"); |
2ed88685 | 877 | return bh; |
10560082 TT |
878 | errout: |
879 | brelse(bh); | |
880 | return ERR_PTR(err); | |
ac27a0ec DK |
881 | } |
882 | ||
617ba13b | 883 | struct buffer_head *ext4_bread(handle_t *handle, struct inode *inode, |
c5e298ae | 884 | ext4_lblk_t block, int map_flags) |
ac27a0ec | 885 | { |
af5bc92d | 886 | struct buffer_head *bh; |
2d069c08 | 887 | int ret; |
ac27a0ec | 888 | |
c5e298ae | 889 | bh = ext4_getblk(handle, inode, block, map_flags); |
1c215028 | 890 | if (IS_ERR(bh)) |
ac27a0ec | 891 | return bh; |
7963e5ac | 892 | if (!bh || ext4_buffer_uptodate(bh)) |
ac27a0ec | 893 | return bh; |
2d069c08 | 894 | |
895 | ret = ext4_read_bh_lock(bh, REQ_META | REQ_PRIO, true); | |
896 | if (ret) { | |
897 | put_bh(bh); | |
898 | return ERR_PTR(ret); | |
899 | } | |
900 | return bh; | |
ac27a0ec DK |
901 | } |
902 | ||
9699d4f9 TE |
903 | /* Read a contiguous batch of blocks. */ |
904 | int ext4_bread_batch(struct inode *inode, ext4_lblk_t block, int bh_count, | |
905 | bool wait, struct buffer_head **bhs) | |
906 | { | |
907 | int i, err; | |
908 | ||
909 | for (i = 0; i < bh_count; i++) { | |
910 | bhs[i] = ext4_getblk(NULL, inode, block + i, 0 /* map_flags */); | |
911 | if (IS_ERR(bhs[i])) { | |
912 | err = PTR_ERR(bhs[i]); | |
913 | bh_count = i; | |
914 | goto out_brelse; | |
915 | } | |
916 | } | |
917 | ||
918 | for (i = 0; i < bh_count; i++) | |
919 | /* Note that NULL bhs[i] is valid because of holes. */ | |
2d069c08 | 920 | if (bhs[i] && !ext4_buffer_uptodate(bhs[i])) |
921 | ext4_read_bh_lock(bhs[i], REQ_META | REQ_PRIO, false); | |
9699d4f9 TE |
922 | |
923 | if (!wait) | |
924 | return 0; | |
925 | ||
926 | for (i = 0; i < bh_count; i++) | |
927 | if (bhs[i]) | |
928 | wait_on_buffer(bhs[i]); | |
929 | ||
930 | for (i = 0; i < bh_count; i++) { | |
931 | if (bhs[i] && !buffer_uptodate(bhs[i])) { | |
932 | err = -EIO; | |
933 | goto out_brelse; | |
934 | } | |
935 | } | |
936 | return 0; | |
937 | ||
938 | out_brelse: | |
939 | for (i = 0; i < bh_count; i++) { | |
940 | brelse(bhs[i]); | |
941 | bhs[i] = NULL; | |
942 | } | |
943 | return err; | |
944 | } | |
945 | ||
188c299e | 946 | int ext4_walk_page_buffers(handle_t *handle, struct inode *inode, |
f19d5870 TM |
947 | struct buffer_head *head, |
948 | unsigned from, | |
949 | unsigned to, | |
950 | int *partial, | |
188c299e | 951 | int (*fn)(handle_t *handle, struct inode *inode, |
f19d5870 | 952 | struct buffer_head *bh)) |
ac27a0ec DK |
953 | { |
954 | struct buffer_head *bh; | |
955 | unsigned block_start, block_end; | |
956 | unsigned blocksize = head->b_size; | |
957 | int err, ret = 0; | |
958 | struct buffer_head *next; | |
959 | ||
af5bc92d TT |
960 | for (bh = head, block_start = 0; |
961 | ret == 0 && (bh != head || !block_start); | |
de9a55b8 | 962 | block_start = block_end, bh = next) { |
ac27a0ec DK |
963 | next = bh->b_this_page; |
964 | block_end = block_start + blocksize; | |
965 | if (block_end <= from || block_start >= to) { | |
966 | if (partial && !buffer_uptodate(bh)) | |
967 | *partial = 1; | |
968 | continue; | |
969 | } | |
188c299e | 970 | err = (*fn)(handle, inode, bh); |
ac27a0ec DK |
971 | if (!ret) |
972 | ret = err; | |
973 | } | |
974 | return ret; | |
975 | } | |
976 | ||
d84c9ebd JK |
977 | /* |
978 | * Helper for handling dirtying of journalled data. We also mark the folio as | |
979 | * dirty so that writeback code knows about this page (and inode) contains | |
980 | * dirty data. ext4_writepages() then commits appropriate transaction to | |
981 | * make data stable. | |
982 | */ | |
983 | static int ext4_dirty_journalled_data(handle_t *handle, struct buffer_head *bh) | |
984 | { | |
985 | folio_mark_dirty(bh->b_folio); | |
986 | return ext4_handle_dirty_metadata(handle, NULL, bh); | |
987 | } | |
988 | ||
188c299e | 989 | int do_journal_get_write_access(handle_t *handle, struct inode *inode, |
f19d5870 | 990 | struct buffer_head *bh) |
ac27a0ec | 991 | { |
56d35a4c JK |
992 | int dirty = buffer_dirty(bh); |
993 | int ret; | |
994 | ||
ac27a0ec DK |
995 | if (!buffer_mapped(bh) || buffer_freed(bh)) |
996 | return 0; | |
56d35a4c | 997 | /* |
ebdec241 | 998 | * __block_write_begin() could have dirtied some buffers. Clean |
56d35a4c JK |
999 | * the dirty bit as jbd2_journal_get_write_access() could complain |
1000 | * otherwise about fs integrity issues. Setting of the dirty bit | |
ebdec241 | 1001 | * by __block_write_begin() isn't a real problem here as we clear |
56d35a4c JK |
1002 | * the bit before releasing a page lock and thus writeback cannot |
1003 | * ever write the buffer. | |
1004 | */ | |
1005 | if (dirty) | |
1006 | clear_buffer_dirty(bh); | |
5d601255 | 1007 | BUFFER_TRACE(bh, "get write access"); |
188c299e JK |
1008 | ret = ext4_journal_get_write_access(handle, inode->i_sb, bh, |
1009 | EXT4_JTR_NONE); | |
56d35a4c | 1010 | if (!ret && dirty) |
d84c9ebd | 1011 | ret = ext4_dirty_journalled_data(handle, bh); |
56d35a4c | 1012 | return ret; |
ac27a0ec DK |
1013 | } |
1014 | ||
643fa961 | 1015 | #ifdef CONFIG_FS_ENCRYPTION |
86b38c27 | 1016 | static int ext4_block_write_begin(struct folio *folio, loff_t pos, unsigned len, |
2058f83a MH |
1017 | get_block_t *get_block) |
1018 | { | |
09cbfeaf | 1019 | unsigned from = pos & (PAGE_SIZE - 1); |
2058f83a | 1020 | unsigned to = from + len; |
86b38c27 | 1021 | struct inode *inode = folio->mapping->host; |
2058f83a MH |
1022 | unsigned block_start, block_end; |
1023 | sector_t block; | |
1024 | int err = 0; | |
1025 | unsigned blocksize = inode->i_sb->s_blocksize; | |
1026 | unsigned bbits; | |
0b578f35 CR |
1027 | struct buffer_head *bh, *head, *wait[2]; |
1028 | int nr_wait = 0; | |
1029 | int i; | |
2058f83a | 1030 | |
86b38c27 | 1031 | BUG_ON(!folio_test_locked(folio)); |
09cbfeaf KS |
1032 | BUG_ON(from > PAGE_SIZE); |
1033 | BUG_ON(to > PAGE_SIZE); | |
2058f83a MH |
1034 | BUG_ON(from > to); |
1035 | ||
86b38c27 | 1036 | head = folio_buffers(folio); |
d4059993 | 1037 | if (!head) |
0a88810d | 1038 | head = create_empty_buffers(folio, blocksize, 0); |
2058f83a | 1039 | bbits = ilog2(blocksize); |
86b38c27 | 1040 | block = (sector_t)folio->index << (PAGE_SHIFT - bbits); |
2058f83a MH |
1041 | |
1042 | for (bh = head, block_start = 0; bh != head || !block_start; | |
1043 | block++, block_start = block_end, bh = bh->b_this_page) { | |
1044 | block_end = block_start + blocksize; | |
1045 | if (block_end <= from || block_start >= to) { | |
86b38c27 | 1046 | if (folio_test_uptodate(folio)) { |
3cd46171 | 1047 | set_buffer_uptodate(bh); |
2058f83a MH |
1048 | } |
1049 | continue; | |
1050 | } | |
1051 | if (buffer_new(bh)) | |
1052 | clear_buffer_new(bh); | |
1053 | if (!buffer_mapped(bh)) { | |
1054 | WARN_ON(bh->b_size != blocksize); | |
1055 | err = get_block(inode, block, bh, 1); | |
1056 | if (err) | |
1057 | break; | |
1058 | if (buffer_new(bh)) { | |
86b38c27 | 1059 | if (folio_test_uptodate(folio)) { |
2058f83a MH |
1060 | clear_buffer_new(bh); |
1061 | set_buffer_uptodate(bh); | |
1062 | mark_buffer_dirty(bh); | |
1063 | continue; | |
1064 | } | |
1065 | if (block_end > to || block_start < from) | |
86b38c27 MW |
1066 | folio_zero_segments(folio, to, |
1067 | block_end, | |
1068 | block_start, from); | |
2058f83a MH |
1069 | continue; |
1070 | } | |
1071 | } | |
86b38c27 | 1072 | if (folio_test_uptodate(folio)) { |
3cd46171 | 1073 | set_buffer_uptodate(bh); |
2058f83a MH |
1074 | continue; |
1075 | } | |
1076 | if (!buffer_uptodate(bh) && !buffer_delay(bh) && | |
1077 | !buffer_unwritten(bh) && | |
1078 | (block_start < from || block_end > to)) { | |
2d069c08 | 1079 | ext4_read_bh_lock(bh, 0, false); |
0b578f35 | 1080 | wait[nr_wait++] = bh; |
2058f83a MH |
1081 | } |
1082 | } | |
1083 | /* | |
1084 | * If we issued read requests, let them complete. | |
1085 | */ | |
0b578f35 CR |
1086 | for (i = 0; i < nr_wait; i++) { |
1087 | wait_on_buffer(wait[i]); | |
1088 | if (!buffer_uptodate(wait[i])) | |
2058f83a MH |
1089 | err = -EIO; |
1090 | } | |
7e0785fc | 1091 | if (unlikely(err)) { |
4a9622f2 | 1092 | folio_zero_new_buffers(folio, from, to); |
4f74d15f | 1093 | } else if (fscrypt_inode_uses_fs_layer_crypto(inode)) { |
0b578f35 CR |
1094 | for (i = 0; i < nr_wait; i++) { |
1095 | int err2; | |
1096 | ||
86b38c27 MW |
1097 | err2 = fscrypt_decrypt_pagecache_blocks(folio, |
1098 | blocksize, bh_offset(wait[i])); | |
0b578f35 CR |
1099 | if (err2) { |
1100 | clear_buffer_uptodate(wait[i]); | |
1101 | err = err2; | |
1102 | } | |
1103 | } | |
7e0785fc CR |
1104 | } |
1105 | ||
2058f83a MH |
1106 | return err; |
1107 | } | |
1108 | #endif | |
1109 | ||
9462f770 JK |
1110 | /* |
1111 | * To preserve ordering, it is essential that the hole instantiation and | |
1112 | * the data write be encapsulated in a single transaction. We cannot | |
1113 | * close off a transaction and start a new one between the ext4_get_block() | |
1114 | * and the ext4_write_end(). So doing the jbd2_journal_start at the start of | |
1115 | * ext4_write_begin() is the right place. | |
1116 | */ | |
bfc1af65 | 1117 | static int ext4_write_begin(struct file *file, struct address_space *mapping, |
9d6b0cd7 | 1118 | loff_t pos, unsigned len, |
de9a55b8 | 1119 | struct page **pagep, void **fsdata) |
ac27a0ec | 1120 | { |
af5bc92d | 1121 | struct inode *inode = mapping->host; |
1938a150 | 1122 | int ret, needed_blocks; |
ac27a0ec DK |
1123 | handle_t *handle; |
1124 | int retries = 0; | |
4d934a5e | 1125 | struct folio *folio; |
de9a55b8 | 1126 | pgoff_t index; |
af5bc92d | 1127 | unsigned from, to; |
bfc1af65 | 1128 | |
eb8ab444 | 1129 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
0db1ff22 TT |
1130 | return -EIO; |
1131 | ||
9d6b0cd7 | 1132 | trace_ext4_write_begin(inode, pos, len); |
1938a150 AK |
1133 | /* |
1134 | * Reserve one block more for addition to orphan list in case | |
1135 | * we allocate blocks but write fails for some reason | |
1136 | */ | |
1137 | needed_blocks = ext4_writepage_trans_blocks(inode) + 1; | |
09cbfeaf KS |
1138 | index = pos >> PAGE_SHIFT; |
1139 | from = pos & (PAGE_SIZE - 1); | |
af5bc92d | 1140 | to = from + len; |
ac27a0ec | 1141 | |
f19d5870 TM |
1142 | if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { |
1143 | ret = ext4_try_to_write_inline_data(mapping, inode, pos, len, | |
832ee62d | 1144 | pagep); |
f19d5870 | 1145 | if (ret < 0) |
47564bfb TT |
1146 | return ret; |
1147 | if (ret == 1) | |
1148 | return 0; | |
f19d5870 TM |
1149 | } |
1150 | ||
47564bfb | 1151 | /* |
4d934a5e MW |
1152 | * __filemap_get_folio() can take a long time if the |
1153 | * system is thrashing due to memory pressure, or if the folio | |
47564bfb TT |
1154 | * is being written back. So grab it first before we start |
1155 | * the transaction handle. This also allows us to allocate | |
4d934a5e | 1156 | * the folio (if needed) without using GFP_NOFS. |
47564bfb TT |
1157 | */ |
1158 | retry_grab: | |
4d934a5e MW |
1159 | folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN, |
1160 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
1161 | if (IS_ERR(folio)) |
1162 | return PTR_ERR(folio); | |
d1052d23 JH |
1163 | /* |
1164 | * The same as page allocation, we prealloc buffer heads before | |
1165 | * starting the handle. | |
1166 | */ | |
4d934a5e | 1167 | if (!folio_buffers(folio)) |
0a88810d | 1168 | create_empty_buffers(folio, inode->i_sb->s_blocksize, 0); |
d1052d23 | 1169 | |
4d934a5e | 1170 | folio_unlock(folio); |
47564bfb TT |
1171 | |
1172 | retry_journal: | |
9924a92a | 1173 | handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, needed_blocks); |
af5bc92d | 1174 | if (IS_ERR(handle)) { |
4d934a5e | 1175 | folio_put(folio); |
47564bfb | 1176 | return PTR_ERR(handle); |
7479d2b9 | 1177 | } |
ac27a0ec | 1178 | |
4d934a5e MW |
1179 | folio_lock(folio); |
1180 | if (folio->mapping != mapping) { | |
1181 | /* The folio got truncated from under us */ | |
1182 | folio_unlock(folio); | |
1183 | folio_put(folio); | |
cf108bca | 1184 | ext4_journal_stop(handle); |
47564bfb | 1185 | goto retry_grab; |
cf108bca | 1186 | } |
4d934a5e MW |
1187 | /* In case writeback began while the folio was unlocked */ |
1188 | folio_wait_stable(folio); | |
cf108bca | 1189 | |
643fa961 | 1190 | #ifdef CONFIG_FS_ENCRYPTION |
2058f83a | 1191 | if (ext4_should_dioread_nolock(inode)) |
86b38c27 | 1192 | ret = ext4_block_write_begin(folio, pos, len, |
705965bd | 1193 | ext4_get_block_unwritten); |
2058f83a | 1194 | else |
86b38c27 | 1195 | ret = ext4_block_write_begin(folio, pos, len, ext4_get_block); |
2058f83a | 1196 | #else |
744692dc | 1197 | if (ext4_should_dioread_nolock(inode)) |
4d934a5e | 1198 | ret = __block_write_begin(&folio->page, pos, len, |
705965bd | 1199 | ext4_get_block_unwritten); |
744692dc | 1200 | else |
4d934a5e | 1201 | ret = __block_write_begin(&folio->page, pos, len, ext4_get_block); |
2058f83a | 1202 | #endif |
bfc1af65 | 1203 | if (!ret && ext4_should_journal_data(inode)) { |
188c299e | 1204 | ret = ext4_walk_page_buffers(handle, inode, |
4d934a5e MW |
1205 | folio_buffers(folio), from, to, |
1206 | NULL, do_journal_get_write_access); | |
ac27a0ec | 1207 | } |
bfc1af65 NP |
1208 | |
1209 | if (ret) { | |
c93d8f88 EB |
1210 | bool extended = (pos + len > inode->i_size) && |
1211 | !ext4_verity_in_progress(inode); | |
1212 | ||
4d934a5e | 1213 | folio_unlock(folio); |
ae4d5372 | 1214 | /* |
6e1db88d | 1215 | * __block_write_begin may have instantiated a few blocks |
ae4d5372 | 1216 | * outside i_size. Trim these off again. Don't need |
f340b3d9 | 1217 | * i_size_read because we hold i_rwsem. |
1938a150 AK |
1218 | * |
1219 | * Add inode to orphan list in case we crash before | |
1220 | * truncate finishes | |
ae4d5372 | 1221 | */ |
c93d8f88 | 1222 | if (extended && ext4_can_truncate(inode)) |
1938a150 AK |
1223 | ext4_orphan_add(handle, inode); |
1224 | ||
1225 | ext4_journal_stop(handle); | |
c93d8f88 | 1226 | if (extended) { |
b9a4207d | 1227 | ext4_truncate_failed_write(inode); |
de9a55b8 | 1228 | /* |
ffacfa7a | 1229 | * If truncate failed early the inode might |
1938a150 AK |
1230 | * still be on the orphan list; we need to |
1231 | * make sure the inode is removed from the | |
1232 | * orphan list in that case. | |
1233 | */ | |
1234 | if (inode->i_nlink) | |
1235 | ext4_orphan_del(NULL, inode); | |
1236 | } | |
bfc1af65 | 1237 | |
47564bfb TT |
1238 | if (ret == -ENOSPC && |
1239 | ext4_should_retry_alloc(inode->i_sb, &retries)) | |
1240 | goto retry_journal; | |
4d934a5e | 1241 | folio_put(folio); |
47564bfb TT |
1242 | return ret; |
1243 | } | |
4d934a5e | 1244 | *pagep = &folio->page; |
ac27a0ec DK |
1245 | return ret; |
1246 | } | |
1247 | ||
bfc1af65 | 1248 | /* For write_end() in data=journal mode */ |
188c299e JK |
1249 | static int write_end_fn(handle_t *handle, struct inode *inode, |
1250 | struct buffer_head *bh) | |
ac27a0ec | 1251 | { |
13fca323 | 1252 | int ret; |
ac27a0ec DK |
1253 | if (!buffer_mapped(bh) || buffer_freed(bh)) |
1254 | return 0; | |
1255 | set_buffer_uptodate(bh); | |
d84c9ebd | 1256 | ret = ext4_dirty_journalled_data(handle, bh); |
13fca323 TT |
1257 | clear_buffer_meta(bh); |
1258 | clear_buffer_prio(bh); | |
1259 | return ret; | |
ac27a0ec DK |
1260 | } |
1261 | ||
eed4333f ZL |
1262 | /* |
1263 | * We need to pick up the new inode size which generic_commit_write gave us | |
1264 | * `file' can be NULL - eg, when called from page_symlink(). | |
1265 | * | |
600f111e | 1266 | * ext4 never places buffers on inode->i_mapping->i_private_list. metadata |
eed4333f ZL |
1267 | * buffers are managed internally. |
1268 | */ | |
1269 | static int ext4_write_end(struct file *file, | |
1270 | struct address_space *mapping, | |
1271 | loff_t pos, unsigned len, unsigned copied, | |
1272 | struct page *page, void *fsdata) | |
f8514083 | 1273 | { |
64fb3136 | 1274 | struct folio *folio = page_folio(page); |
f8514083 | 1275 | handle_t *handle = ext4_journal_current_handle(); |
eed4333f | 1276 | struct inode *inode = mapping->host; |
0572639f | 1277 | loff_t old_size = inode->i_size; |
eed4333f ZL |
1278 | int ret = 0, ret2; |
1279 | int i_size_changed = 0; | |
c93d8f88 | 1280 | bool verity = ext4_verity_in_progress(inode); |
eed4333f ZL |
1281 | |
1282 | trace_ext4_write_end(inode, pos, len, copied); | |
6984aef5 | 1283 | |
5c099c4f YB |
1284 | if (ext4_has_inline_data(inode) && |
1285 | ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) | |
d19500da RH |
1286 | return ext4_write_inline_data_end(inode, pos, len, copied, |
1287 | folio); | |
6984aef5 ZY |
1288 | |
1289 | copied = block_write_end(file, mapping, pos, len, copied, page, fsdata); | |
f8514083 | 1290 | /* |
64fb3136 | 1291 | * it's important to update i_size while still holding folio lock: |
f8514083 | 1292 | * page writeout could otherwise come in and zero beyond i_size. |
c93d8f88 EB |
1293 | * |
1294 | * If FS_IOC_ENABLE_VERITY is running on this inode, then Merkle tree | |
1295 | * blocks are being written past EOF, so skip the i_size update. | |
f8514083 | 1296 | */ |
c93d8f88 EB |
1297 | if (!verity) |
1298 | i_size_changed = ext4_update_inode_size(inode, pos + copied); | |
64fb3136 MW |
1299 | folio_unlock(folio); |
1300 | folio_put(folio); | |
f8514083 | 1301 | |
c93d8f88 | 1302 | if (old_size < pos && !verity) |
0572639f | 1303 | pagecache_isize_extended(inode, old_size, pos); |
f8514083 | 1304 | /* |
64fb3136 MW |
1305 | * Don't mark the inode dirty under folio lock. First, it unnecessarily |
1306 | * makes the holding time of folio lock longer. Second, it forces lock | |
1307 | * ordering of folio lock and transaction start for journaling | |
f8514083 AK |
1308 | * filesystems. |
1309 | */ | |
6984aef5 | 1310 | if (i_size_changed) |
4209ae12 | 1311 | ret = ext4_mark_inode_dirty(handle, inode); |
f8514083 | 1312 | |
c93d8f88 | 1313 | if (pos + len > inode->i_size && !verity && ext4_can_truncate(inode)) |
f8514083 AK |
1314 | /* if we have allocated more blocks and copied |
1315 | * less. We will have blocks allocated outside | |
1316 | * inode->i_size. So truncate them | |
1317 | */ | |
1318 | ext4_orphan_add(handle, inode); | |
55ce2f64 | 1319 | |
617ba13b | 1320 | ret2 = ext4_journal_stop(handle); |
ac27a0ec DK |
1321 | if (!ret) |
1322 | ret = ret2; | |
bfc1af65 | 1323 | |
c93d8f88 | 1324 | if (pos + len > inode->i_size && !verity) { |
b9a4207d | 1325 | ext4_truncate_failed_write(inode); |
de9a55b8 | 1326 | /* |
ffacfa7a | 1327 | * If truncate failed early the inode might still be |
f8514083 AK |
1328 | * on the orphan list; we need to make sure the inode |
1329 | * is removed from the orphan list in that case. | |
1330 | */ | |
1331 | if (inode->i_nlink) | |
1332 | ext4_orphan_del(NULL, inode); | |
1333 | } | |
1334 | ||
bfc1af65 | 1335 | return ret ? ret : copied; |
ac27a0ec DK |
1336 | } |
1337 | ||
b90197b6 | 1338 | /* |
4a9622f2 | 1339 | * This is a private version of folio_zero_new_buffers() which doesn't |
b90197b6 | 1340 | * set the buffer to be dirty, since in data=journalled mode we need |
d84c9ebd | 1341 | * to call ext4_dirty_journalled_data() instead. |
b90197b6 | 1342 | */ |
3b136499 | 1343 | static void ext4_journalled_zero_new_buffers(handle_t *handle, |
188c299e | 1344 | struct inode *inode, |
86324a21 | 1345 | struct folio *folio, |
3b136499 | 1346 | unsigned from, unsigned to) |
b90197b6 TT |
1347 | { |
1348 | unsigned int block_start = 0, block_end; | |
1349 | struct buffer_head *head, *bh; | |
1350 | ||
86324a21 | 1351 | bh = head = folio_buffers(folio); |
b90197b6 TT |
1352 | do { |
1353 | block_end = block_start + bh->b_size; | |
1354 | if (buffer_new(bh)) { | |
1355 | if (block_end > from && block_start < to) { | |
86324a21 | 1356 | if (!folio_test_uptodate(folio)) { |
b90197b6 TT |
1357 | unsigned start, size; |
1358 | ||
1359 | start = max(from, block_start); | |
1360 | size = min(to, block_end) - start; | |
1361 | ||
86324a21 | 1362 | folio_zero_range(folio, start, size); |
188c299e | 1363 | write_end_fn(handle, inode, bh); |
b90197b6 TT |
1364 | } |
1365 | clear_buffer_new(bh); | |
1366 | } | |
1367 | } | |
1368 | block_start = block_end; | |
1369 | bh = bh->b_this_page; | |
1370 | } while (bh != head); | |
1371 | } | |
1372 | ||
bfc1af65 | 1373 | static int ext4_journalled_write_end(struct file *file, |
de9a55b8 TT |
1374 | struct address_space *mapping, |
1375 | loff_t pos, unsigned len, unsigned copied, | |
1376 | struct page *page, void *fsdata) | |
ac27a0ec | 1377 | { |
feb22b77 | 1378 | struct folio *folio = page_folio(page); |
617ba13b | 1379 | handle_t *handle = ext4_journal_current_handle(); |
bfc1af65 | 1380 | struct inode *inode = mapping->host; |
0572639f | 1381 | loff_t old_size = inode->i_size; |
ac27a0ec DK |
1382 | int ret = 0, ret2; |
1383 | int partial = 0; | |
bfc1af65 | 1384 | unsigned from, to; |
4631dbf6 | 1385 | int size_changed = 0; |
c93d8f88 | 1386 | bool verity = ext4_verity_in_progress(inode); |
ac27a0ec | 1387 | |
9bffad1e | 1388 | trace_ext4_journalled_write_end(inode, pos, len, copied); |
09cbfeaf | 1389 | from = pos & (PAGE_SIZE - 1); |
bfc1af65 NP |
1390 | to = from + len; |
1391 | ||
441c8508 CW |
1392 | BUG_ON(!ext4_handle_valid(handle)); |
1393 | ||
6984aef5 | 1394 | if (ext4_has_inline_data(inode)) |
d19500da RH |
1395 | return ext4_write_inline_data_end(inode, pos, len, copied, |
1396 | folio); | |
6984aef5 | 1397 | |
feb22b77 | 1398 | if (unlikely(copied < len) && !folio_test_uptodate(folio)) { |
3b136499 | 1399 | copied = 0; |
86324a21 MW |
1400 | ext4_journalled_zero_new_buffers(handle, inode, folio, |
1401 | from, to); | |
3b136499 JK |
1402 | } else { |
1403 | if (unlikely(copied < len)) | |
86324a21 | 1404 | ext4_journalled_zero_new_buffers(handle, inode, folio, |
3b136499 | 1405 | from + copied, to); |
feb22b77 MW |
1406 | ret = ext4_walk_page_buffers(handle, inode, |
1407 | folio_buffers(folio), | |
188c299e | 1408 | from, from + copied, &partial, |
3b136499 | 1409 | write_end_fn); |
3fdcfb66 | 1410 | if (!partial) |
feb22b77 | 1411 | folio_mark_uptodate(folio); |
3fdcfb66 | 1412 | } |
c93d8f88 EB |
1413 | if (!verity) |
1414 | size_changed = ext4_update_inode_size(inode, pos + copied); | |
2d859db3 | 1415 | EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid; |
feb22b77 MW |
1416 | folio_unlock(folio); |
1417 | folio_put(folio); | |
4631dbf6 | 1418 | |
c93d8f88 | 1419 | if (old_size < pos && !verity) |
0572639f XW |
1420 | pagecache_isize_extended(inode, old_size, pos); |
1421 | ||
6984aef5 | 1422 | if (size_changed) { |
617ba13b | 1423 | ret2 = ext4_mark_inode_dirty(handle, inode); |
ac27a0ec DK |
1424 | if (!ret) |
1425 | ret = ret2; | |
1426 | } | |
bfc1af65 | 1427 | |
c93d8f88 | 1428 | if (pos + len > inode->i_size && !verity && ext4_can_truncate(inode)) |
f8514083 AK |
1429 | /* if we have allocated more blocks and copied |
1430 | * less. We will have blocks allocated outside | |
1431 | * inode->i_size. So truncate them | |
1432 | */ | |
1433 | ext4_orphan_add(handle, inode); | |
1434 | ||
617ba13b | 1435 | ret2 = ext4_journal_stop(handle); |
ac27a0ec DK |
1436 | if (!ret) |
1437 | ret = ret2; | |
c93d8f88 | 1438 | if (pos + len > inode->i_size && !verity) { |
b9a4207d | 1439 | ext4_truncate_failed_write(inode); |
de9a55b8 | 1440 | /* |
ffacfa7a | 1441 | * If truncate failed early the inode might still be |
f8514083 AK |
1442 | * on the orphan list; we need to make sure the inode |
1443 | * is removed from the orphan list in that case. | |
1444 | */ | |
1445 | if (inode->i_nlink) | |
1446 | ext4_orphan_del(NULL, inode); | |
1447 | } | |
bfc1af65 NP |
1448 | |
1449 | return ret ? ret : copied; | |
ac27a0ec | 1450 | } |
d2a17637 | 1451 | |
9d0be502 | 1452 | /* |
c27e43a1 | 1453 | * Reserve space for a single cluster |
9d0be502 | 1454 | */ |
c27e43a1 | 1455 | static int ext4_da_reserve_space(struct inode *inode) |
d2a17637 | 1456 | { |
60e58e0f | 1457 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
0637c6f4 | 1458 | struct ext4_inode_info *ei = EXT4_I(inode); |
5dd4056d | 1459 | int ret; |
03179fe9 TT |
1460 | |
1461 | /* | |
1462 | * We will charge metadata quota at writeout time; this saves | |
1463 | * us from metadata over-estimation, though we may go over by | |
1464 | * a small amount in the end. Here we just reserve for data. | |
1465 | */ | |
1466 | ret = dquot_reserve_block(inode, EXT4_C2B(sbi, 1)); | |
1467 | if (ret) | |
1468 | return ret; | |
d2a17637 | 1469 | |
0637c6f4 | 1470 | spin_lock(&ei->i_block_reservation_lock); |
71d4f7d0 | 1471 | if (ext4_claim_free_clusters(sbi, 1, 0)) { |
03179fe9 | 1472 | spin_unlock(&ei->i_block_reservation_lock); |
03179fe9 | 1473 | dquot_release_reservation_block(inode, EXT4_C2B(sbi, 1)); |
d2a17637 MC |
1474 | return -ENOSPC; |
1475 | } | |
9d0be502 | 1476 | ei->i_reserved_data_blocks++; |
c27e43a1 | 1477 | trace_ext4_da_reserve_space(inode); |
0637c6f4 | 1478 | spin_unlock(&ei->i_block_reservation_lock); |
39bc680a | 1479 | |
d2a17637 MC |
1480 | return 0; /* success */ |
1481 | } | |
1482 | ||
f456767d | 1483 | void ext4_da_release_space(struct inode *inode, int to_free) |
d2a17637 MC |
1484 | { |
1485 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
0637c6f4 | 1486 | struct ext4_inode_info *ei = EXT4_I(inode); |
d2a17637 | 1487 | |
cd213226 MC |
1488 | if (!to_free) |
1489 | return; /* Nothing to release, exit */ | |
1490 | ||
d2a17637 | 1491 | spin_lock(&EXT4_I(inode)->i_block_reservation_lock); |
cd213226 | 1492 | |
5a58ec87 | 1493 | trace_ext4_da_release_space(inode, to_free); |
0637c6f4 | 1494 | if (unlikely(to_free > ei->i_reserved_data_blocks)) { |
cd213226 | 1495 | /* |
0637c6f4 TT |
1496 | * if there aren't enough reserved blocks, then the |
1497 | * counter is messed up somewhere. Since this | |
1498 | * function is called from invalidate page, it's | |
1499 | * harmless to return without any action. | |
cd213226 | 1500 | */ |
8de5c325 | 1501 | ext4_warning(inode->i_sb, "ext4_da_release_space: " |
0637c6f4 | 1502 | "ino %lu, to_free %d with only %d reserved " |
1084f252 | 1503 | "data blocks", inode->i_ino, to_free, |
0637c6f4 TT |
1504 | ei->i_reserved_data_blocks); |
1505 | WARN_ON(1); | |
1506 | to_free = ei->i_reserved_data_blocks; | |
cd213226 | 1507 | } |
0637c6f4 | 1508 | ei->i_reserved_data_blocks -= to_free; |
cd213226 | 1509 | |
72b8ab9d | 1510 | /* update fs dirty data blocks counter */ |
57042651 | 1511 | percpu_counter_sub(&sbi->s_dirtyclusters_counter, to_free); |
d2a17637 | 1512 | |
d2a17637 | 1513 | spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); |
60e58e0f | 1514 | |
7b415bf6 | 1515 | dquot_release_reservation_block(inode, EXT4_C2B(sbi, to_free)); |
d2a17637 MC |
1516 | } |
1517 | ||
64769240 AT |
1518 | /* |
1519 | * Delayed allocation stuff | |
1520 | */ | |
1521 | ||
4e7ea81d | 1522 | struct mpage_da_data { |
15648d59 | 1523 | /* These are input fields for ext4_do_writepages() */ |
4e7ea81d JK |
1524 | struct inode *inode; |
1525 | struct writeback_control *wbc; | |
15648d59 | 1526 | unsigned int can_map:1; /* Can writepages call map blocks? */ |
6b523df4 | 1527 | |
15648d59 | 1528 | /* These are internal state of ext4_do_writepages() */ |
4e7ea81d JK |
1529 | pgoff_t first_page; /* The first page to write */ |
1530 | pgoff_t next_page; /* Current page to examine */ | |
1531 | pgoff_t last_page; /* Last page to examine */ | |
791b7f08 | 1532 | /* |
4e7ea81d JK |
1533 | * Extent to map - this can be after first_page because that can be |
1534 | * fully mapped. We somewhat abuse m_flags to store whether the extent | |
1535 | * is delalloc or unwritten. | |
791b7f08 | 1536 | */ |
4e7ea81d JK |
1537 | struct ext4_map_blocks map; |
1538 | struct ext4_io_submit io_submit; /* IO submission data */ | |
dddbd6ac | 1539 | unsigned int do_map:1; |
6b8ed620 | 1540 | unsigned int scanned_until_end:1; |
1f1a55f0 | 1541 | unsigned int journalled_more_data:1; |
4e7ea81d | 1542 | }; |
64769240 | 1543 | |
4e7ea81d JK |
1544 | static void mpage_release_unused_pages(struct mpage_da_data *mpd, |
1545 | bool invalidate) | |
c4a0c46e | 1546 | { |
fb5a5be0 | 1547 | unsigned nr, i; |
c4a0c46e | 1548 | pgoff_t index, end; |
fb5a5be0 | 1549 | struct folio_batch fbatch; |
c4a0c46e AK |
1550 | struct inode *inode = mpd->inode; |
1551 | struct address_space *mapping = inode->i_mapping; | |
4e7ea81d JK |
1552 | |
1553 | /* This is necessary when next_page == 0. */ | |
1554 | if (mpd->first_page >= mpd->next_page) | |
1555 | return; | |
c4a0c46e | 1556 | |
6b8ed620 | 1557 | mpd->scanned_until_end = 0; |
c7f5938a CW |
1558 | index = mpd->first_page; |
1559 | end = mpd->next_page - 1; | |
4e7ea81d JK |
1560 | if (invalidate) { |
1561 | ext4_lblk_t start, last; | |
09cbfeaf KS |
1562 | start = index << (PAGE_SHIFT - inode->i_blkbits); |
1563 | last = end << (PAGE_SHIFT - inode->i_blkbits); | |
7f0d8e1d EW |
1564 | |
1565 | /* | |
1566 | * avoid racing with extent status tree scans made by | |
1567 | * ext4_insert_delayed_block() | |
1568 | */ | |
1569 | down_write(&EXT4_I(inode)->i_data_sem); | |
4e7ea81d | 1570 | ext4_es_remove_extent(inode, start, last - start + 1); |
7f0d8e1d | 1571 | up_write(&EXT4_I(inode)->i_data_sem); |
4e7ea81d | 1572 | } |
51865fda | 1573 | |
fb5a5be0 | 1574 | folio_batch_init(&fbatch); |
c4a0c46e | 1575 | while (index <= end) { |
fb5a5be0 MWO |
1576 | nr = filemap_get_folios(mapping, &index, end, &fbatch); |
1577 | if (nr == 0) | |
c4a0c46e | 1578 | break; |
fb5a5be0 MWO |
1579 | for (i = 0; i < nr; i++) { |
1580 | struct folio *folio = fbatch.folios[i]; | |
2b85a617 | 1581 | |
fb5a5be0 MWO |
1582 | if (folio->index < mpd->first_page) |
1583 | continue; | |
87b11f86 | 1584 | if (folio_next_index(folio) - 1 > end) |
fb5a5be0 | 1585 | continue; |
7ba13abb MWO |
1586 | BUG_ON(!folio_test_locked(folio)); |
1587 | BUG_ON(folio_test_writeback(folio)); | |
4e7ea81d | 1588 | if (invalidate) { |
7ba13abb MWO |
1589 | if (folio_mapped(folio)) |
1590 | folio_clear_dirty_for_io(folio); | |
1591 | block_invalidate_folio(folio, 0, | |
1592 | folio_size(folio)); | |
1593 | folio_clear_uptodate(folio); | |
4e7ea81d | 1594 | } |
7ba13abb | 1595 | folio_unlock(folio); |
c4a0c46e | 1596 | } |
fb5a5be0 | 1597 | folio_batch_release(&fbatch); |
c4a0c46e | 1598 | } |
c4a0c46e AK |
1599 | } |
1600 | ||
df22291f AK |
1601 | static void ext4_print_free_blocks(struct inode *inode) |
1602 | { | |
1603 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
92b97816 | 1604 | struct super_block *sb = inode->i_sb; |
f78ee70d | 1605 | struct ext4_inode_info *ei = EXT4_I(inode); |
92b97816 TT |
1606 | |
1607 | ext4_msg(sb, KERN_CRIT, "Total free blocks count %lld", | |
5dee5437 | 1608 | EXT4_C2B(EXT4_SB(inode->i_sb), |
f78ee70d | 1609 | ext4_count_free_clusters(sb))); |
92b97816 TT |
1610 | ext4_msg(sb, KERN_CRIT, "Free/Dirty block details"); |
1611 | ext4_msg(sb, KERN_CRIT, "free_blocks=%lld", | |
f78ee70d | 1612 | (long long) EXT4_C2B(EXT4_SB(sb), |
57042651 | 1613 | percpu_counter_sum(&sbi->s_freeclusters_counter))); |
92b97816 | 1614 | ext4_msg(sb, KERN_CRIT, "dirty_blocks=%lld", |
f78ee70d | 1615 | (long long) EXT4_C2B(EXT4_SB(sb), |
7b415bf6 | 1616 | percpu_counter_sum(&sbi->s_dirtyclusters_counter))); |
92b97816 TT |
1617 | ext4_msg(sb, KERN_CRIT, "Block reservation details"); |
1618 | ext4_msg(sb, KERN_CRIT, "i_reserved_data_blocks=%u", | |
f78ee70d | 1619 | ei->i_reserved_data_blocks); |
df22291f AK |
1620 | return; |
1621 | } | |
1622 | ||
0b02f4c0 EW |
1623 | /* |
1624 | * ext4_insert_delayed_block - adds a delayed block to the extents status | |
1625 | * tree, incrementing the reserved cluster/block | |
1626 | * count or making a pending reservation | |
1627 | * where needed | |
1628 | * | |
1629 | * @inode - file containing the newly added block | |
1630 | * @lblk - logical block to be added | |
1631 | * | |
1632 | * Returns 0 on success, negative error code on failure. | |
1633 | */ | |
1634 | static int ext4_insert_delayed_block(struct inode *inode, ext4_lblk_t lblk) | |
1635 | { | |
1636 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
1637 | int ret; | |
1638 | bool allocated = false; | |
1639 | ||
1640 | /* | |
1641 | * If the cluster containing lblk is shared with a delayed, | |
1642 | * written, or unwritten extent in a bigalloc file system, it's | |
1643 | * already been accounted for and does not need to be reserved. | |
1644 | * A pending reservation must be made for the cluster if it's | |
1645 | * shared with a written or unwritten extent and doesn't already | |
1646 | * have one. Written and unwritten extents can be purged from the | |
1647 | * extents status tree if the system is under memory pressure, so | |
1648 | * it's necessary to examine the extent tree if a search of the | |
1649 | * extents status tree doesn't get a match. | |
1650 | */ | |
1651 | if (sbi->s_cluster_ratio == 1) { | |
1652 | ret = ext4_da_reserve_space(inode); | |
1653 | if (ret != 0) /* ENOSPC */ | |
8782b020 | 1654 | return ret; |
0b02f4c0 EW |
1655 | } else { /* bigalloc */ |
1656 | if (!ext4_es_scan_clu(inode, &ext4_es_is_delonly, lblk)) { | |
1657 | if (!ext4_es_scan_clu(inode, | |
1658 | &ext4_es_is_mapped, lblk)) { | |
1659 | ret = ext4_clu_mapped(inode, | |
1660 | EXT4_B2C(sbi, lblk)); | |
1661 | if (ret < 0) | |
8782b020 | 1662 | return ret; |
0b02f4c0 EW |
1663 | if (ret == 0) { |
1664 | ret = ext4_da_reserve_space(inode); | |
1665 | if (ret != 0) /* ENOSPC */ | |
8782b020 | 1666 | return ret; |
0b02f4c0 EW |
1667 | } else { |
1668 | allocated = true; | |
1669 | } | |
1670 | } else { | |
1671 | allocated = true; | |
1672 | } | |
1673 | } | |
1674 | } | |
1675 | ||
8782b020 BL |
1676 | ext4_es_insert_delayed_block(inode, lblk, allocated); |
1677 | return 0; | |
0b02f4c0 EW |
1678 | } |
1679 | ||
5356f261 AK |
1680 | /* |
1681 | * This function is grabs code from the very beginning of | |
1682 | * ext4_map_blocks, but assumes that the caller is from delayed write | |
1683 | * time. This function looks up the requested blocks and sets the | |
1684 | * buffer delay bit under the protection of i_data_sem. | |
1685 | */ | |
1686 | static int ext4_da_map_blocks(struct inode *inode, sector_t iblock, | |
1687 | struct ext4_map_blocks *map, | |
1688 | struct buffer_head *bh) | |
1689 | { | |
d100eef2 | 1690 | struct extent_status es; |
5356f261 AK |
1691 | int retval; |
1692 | sector_t invalid_block = ~((sector_t) 0xffff); | |
921f266b DM |
1693 | #ifdef ES_AGGRESSIVE_TEST |
1694 | struct ext4_map_blocks orig_map; | |
1695 | ||
1696 | memcpy(&orig_map, map, sizeof(*map)); | |
1697 | #endif | |
5356f261 AK |
1698 | |
1699 | if (invalid_block < ext4_blocks_count(EXT4_SB(inode->i_sb)->s_es)) | |
1700 | invalid_block = ~0; | |
1701 | ||
1702 | map->m_flags = 0; | |
70aa1554 | 1703 | ext_debug(inode, "max_blocks %u, logical block %lu\n", map->m_len, |
5356f261 | 1704 | (unsigned long) map->m_lblk); |
d100eef2 ZL |
1705 | |
1706 | /* Lookup extent status tree firstly */ | |
bb5835ed | 1707 | if (ext4_es_lookup_extent(inode, iblock, NULL, &es)) { |
acf795dc | 1708 | if (ext4_es_is_hole(&es)) |
d100eef2 | 1709 | goto add_delayed; |
d100eef2 ZL |
1710 | |
1711 | /* | |
3eda41df EW |
1712 | * Delayed extent could be allocated by fallocate. |
1713 | * So we need to check it. | |
d100eef2 | 1714 | */ |
3eda41df EW |
1715 | if (ext4_es_is_delayed(&es) && !ext4_es_is_unwritten(&es)) { |
1716 | map_bh(bh, inode->i_sb, invalid_block); | |
1717 | set_buffer_new(bh); | |
1718 | set_buffer_delay(bh); | |
d100eef2 ZL |
1719 | return 0; |
1720 | } | |
1721 | ||
1722 | map->m_pblk = ext4_es_pblock(&es) + iblock - es.es_lblk; | |
1723 | retval = es.es_len - (iblock - es.es_lblk); | |
1724 | if (retval > map->m_len) | |
1725 | retval = map->m_len; | |
1726 | map->m_len = retval; | |
1727 | if (ext4_es_is_written(&es)) | |
1728 | map->m_flags |= EXT4_MAP_MAPPED; | |
1729 | else if (ext4_es_is_unwritten(&es)) | |
1730 | map->m_flags |= EXT4_MAP_UNWRITTEN; | |
1731 | else | |
1e83bc81 | 1732 | BUG(); |
d100eef2 | 1733 | |
921f266b DM |
1734 | #ifdef ES_AGGRESSIVE_TEST |
1735 | ext4_map_blocks_es_recheck(NULL, inode, map, &orig_map, 0); | |
1736 | #endif | |
d100eef2 ZL |
1737 | return retval; |
1738 | } | |
1739 | ||
5356f261 AK |
1740 | /* |
1741 | * Try to see if we can get the block without requesting a new | |
1742 | * file system block. | |
1743 | */ | |
c8b459f4 | 1744 | down_read(&EXT4_I(inode)->i_data_sem); |
cbd7584e | 1745 | if (ext4_has_inline_data(inode)) |
9c3569b5 | 1746 | retval = 0; |
cbd7584e | 1747 | else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) |
2f8e0a7c | 1748 | retval = ext4_ext_map_blocks(NULL, inode, map, 0); |
5356f261 | 1749 | else |
2f8e0a7c | 1750 | retval = ext4_ind_map_blocks(NULL, inode, map, 0); |
acf795dc ZY |
1751 | if (retval < 0) { |
1752 | up_read(&EXT4_I(inode)->i_data_sem); | |
1753 | return retval; | |
1754 | } | |
3fcc2b88 | 1755 | if (retval > 0) { |
3be78c73 | 1756 | unsigned int status; |
f7fec032 | 1757 | |
44fb851d ZL |
1758 | if (unlikely(retval != map->m_len)) { |
1759 | ext4_warning(inode->i_sb, | |
1760 | "ES len assertion failed for inode " | |
1761 | "%lu: retval %d != map->m_len %d", | |
1762 | inode->i_ino, retval, map->m_len); | |
1763 | WARN_ON(1); | |
921f266b | 1764 | } |
921f266b | 1765 | |
f7fec032 ZL |
1766 | status = map->m_flags & EXT4_MAP_UNWRITTEN ? |
1767 | EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN; | |
6c120399 BL |
1768 | ext4_es_insert_extent(inode, map->m_lblk, map->m_len, |
1769 | map->m_pblk, status); | |
acf795dc ZY |
1770 | up_read(&EXT4_I(inode)->i_data_sem); |
1771 | return retval; | |
5356f261 | 1772 | } |
acf795dc | 1773 | up_read(&EXT4_I(inode)->i_data_sem); |
5356f261 | 1774 | |
3fcc2b88 | 1775 | add_delayed: |
acf795dc | 1776 | down_write(&EXT4_I(inode)->i_data_sem); |
3fcc2b88 | 1777 | retval = ext4_insert_delayed_block(inode, map->m_lblk); |
acf795dc | 1778 | up_write(&EXT4_I(inode)->i_data_sem); |
3fcc2b88 | 1779 | if (retval) |
acf795dc | 1780 | return retval; |
3fcc2b88 ZY |
1781 | |
1782 | map_bh(bh, inode->i_sb, invalid_block); | |
1783 | set_buffer_new(bh); | |
1784 | set_buffer_delay(bh); | |
5356f261 AK |
1785 | return retval; |
1786 | } | |
1787 | ||
64769240 | 1788 | /* |
d91bd2c1 | 1789 | * This is a special get_block_t callback which is used by |
b920c755 TT |
1790 | * ext4_da_write_begin(). It will either return mapped block or |
1791 | * reserve space for a single block. | |
29fa89d0 AK |
1792 | * |
1793 | * For delayed buffer_head we have BH_Mapped, BH_New, BH_Delay set. | |
1794 | * We also have b_blocknr = -1 and b_bdev initialized properly | |
1795 | * | |
1796 | * For unwritten buffer_head we have BH_Mapped, BH_New, BH_Unwritten set. | |
1797 | * We also have b_blocknr = physicalblock mapping unwritten extent and b_bdev | |
1798 | * initialized properly. | |
64769240 | 1799 | */ |
9c3569b5 TM |
1800 | int ext4_da_get_block_prep(struct inode *inode, sector_t iblock, |
1801 | struct buffer_head *bh, int create) | |
64769240 | 1802 | { |
2ed88685 | 1803 | struct ext4_map_blocks map; |
64769240 AT |
1804 | int ret = 0; |
1805 | ||
1806 | BUG_ON(create == 0); | |
2ed88685 TT |
1807 | BUG_ON(bh->b_size != inode->i_sb->s_blocksize); |
1808 | ||
1809 | map.m_lblk = iblock; | |
1810 | map.m_len = 1; | |
64769240 AT |
1811 | |
1812 | /* | |
1813 | * first, we need to know whether the block is allocated already | |
1814 | * preallocated blocks are unmapped but should treated | |
1815 | * the same as allocated blocks. | |
1816 | */ | |
5356f261 AK |
1817 | ret = ext4_da_map_blocks(inode, iblock, &map, bh); |
1818 | if (ret <= 0) | |
2ed88685 | 1819 | return ret; |
64769240 | 1820 | |
2ed88685 | 1821 | map_bh(bh, inode->i_sb, map.m_pblk); |
ed8ad838 | 1822 | ext4_update_bh_state(bh, map.m_flags); |
2ed88685 TT |
1823 | |
1824 | if (buffer_unwritten(bh)) { | |
1825 | /* A delayed write to unwritten bh should be marked | |
1826 | * new and mapped. Mapped ensures that we don't do | |
1827 | * get_block multiple times when we write to the same | |
1828 | * offset and new ensures that we do proper zero out | |
1829 | * for partial write. | |
1830 | */ | |
1831 | set_buffer_new(bh); | |
c8205636 | 1832 | set_buffer_mapped(bh); |
2ed88685 TT |
1833 | } |
1834 | return 0; | |
64769240 | 1835 | } |
61628a3f | 1836 | |
33483b3b | 1837 | static void mpage_folio_done(struct mpage_da_data *mpd, struct folio *folio) |
eaf2ca10 | 1838 | { |
33483b3b MW |
1839 | mpd->first_page += folio_nr_pages(folio); |
1840 | folio_unlock(folio); | |
eaf2ca10 JK |
1841 | } |
1842 | ||
81a0d3e1 | 1843 | static int mpage_submit_folio(struct mpage_da_data *mpd, struct folio *folio) |
5f1132b2 | 1844 | { |
81a0d3e1 | 1845 | size_t len; |
a056bdaa | 1846 | loff_t size; |
5f1132b2 JK |
1847 | int err; |
1848 | ||
81a0d3e1 MW |
1849 | BUG_ON(folio->index != mpd->first_page); |
1850 | folio_clear_dirty_for_io(folio); | |
a056bdaa JK |
1851 | /* |
1852 | * We have to be very careful here! Nothing protects writeback path | |
1853 | * against i_size changes and the page can be writeably mapped into | |
1854 | * page tables. So an application can be growing i_size and writing | |
81a0d3e1 | 1855 | * data through mmap while writeback runs. folio_clear_dirty_for_io() |
a056bdaa | 1856 | * write-protects our page in page tables and the page cannot get |
81a0d3e1 MW |
1857 | * written to again until we release folio lock. So only after |
1858 | * folio_clear_dirty_for_io() we are safe to sample i_size for | |
e8d6062c MW |
1859 | * ext4_bio_write_folio() to zero-out tail of the written page. We rely |
1860 | * on the barrier provided by folio_test_clear_dirty() in | |
81a0d3e1 | 1861 | * folio_clear_dirty_for_io() to make sure i_size is really sampled only |
a056bdaa JK |
1862 | * after page tables are updated. |
1863 | */ | |
1864 | size = i_size_read(mpd->inode); | |
81a0d3e1 MW |
1865 | len = folio_size(folio); |
1866 | if (folio_pos(folio) + len > size && | |
c93d8f88 | 1867 | !ext4_verity_in_progress(mpd->inode)) |
09cbfeaf | 1868 | len = size & ~PAGE_MASK; |
e8d6062c | 1869 | err = ext4_bio_write_folio(&mpd->io_submit, folio, len); |
5f1132b2 JK |
1870 | if (!err) |
1871 | mpd->wbc->nr_to_write--; | |
5f1132b2 JK |
1872 | |
1873 | return err; | |
1874 | } | |
1875 | ||
6db07461 | 1876 | #define BH_FLAGS (BIT(BH_Unwritten) | BIT(BH_Delay)) |
4e7ea81d | 1877 | |
61628a3f | 1878 | /* |
fffb2739 JK |
1879 | * mballoc gives us at most this number of blocks... |
1880 | * XXX: That seems to be only a limitation of ext4_mb_normalize_request(). | |
70261f56 | 1881 | * The rest of mballoc seems to handle chunks up to full group size. |
61628a3f | 1882 | */ |
fffb2739 | 1883 | #define MAX_WRITEPAGES_EXTENT_LEN 2048 |
525f4ed8 | 1884 | |
4e7ea81d JK |
1885 | /* |
1886 | * mpage_add_bh_to_extent - try to add bh to extent of blocks to map | |
1887 | * | |
1888 | * @mpd - extent of blocks | |
1889 | * @lblk - logical number of the block in the file | |
09930042 | 1890 | * @bh - buffer head we want to add to the extent |
4e7ea81d | 1891 | * |
09930042 JK |
1892 | * The function is used to collect contig. blocks in the same state. If the |
1893 | * buffer doesn't require mapping for writeback and we haven't started the | |
1894 | * extent of buffers to map yet, the function returns 'true' immediately - the | |
1895 | * caller can write the buffer right away. Otherwise the function returns true | |
1896 | * if the block has been added to the extent, false if the block couldn't be | |
1897 | * added. | |
4e7ea81d | 1898 | */ |
09930042 JK |
1899 | static bool mpage_add_bh_to_extent(struct mpage_da_data *mpd, ext4_lblk_t lblk, |
1900 | struct buffer_head *bh) | |
4e7ea81d JK |
1901 | { |
1902 | struct ext4_map_blocks *map = &mpd->map; | |
1903 | ||
09930042 JK |
1904 | /* Buffer that doesn't need mapping for writeback? */ |
1905 | if (!buffer_dirty(bh) || !buffer_mapped(bh) || | |
1906 | (!buffer_delay(bh) && !buffer_unwritten(bh))) { | |
1907 | /* So far no extent to map => we write the buffer right away */ | |
1908 | if (map->m_len == 0) | |
1909 | return true; | |
1910 | return false; | |
1911 | } | |
4e7ea81d JK |
1912 | |
1913 | /* First block in the extent? */ | |
1914 | if (map->m_len == 0) { | |
dddbd6ac JK |
1915 | /* We cannot map unless handle is started... */ |
1916 | if (!mpd->do_map) | |
1917 | return false; | |
4e7ea81d JK |
1918 | map->m_lblk = lblk; |
1919 | map->m_len = 1; | |
09930042 JK |
1920 | map->m_flags = bh->b_state & BH_FLAGS; |
1921 | return true; | |
4e7ea81d JK |
1922 | } |
1923 | ||
09930042 JK |
1924 | /* Don't go larger than mballoc is willing to allocate */ |
1925 | if (map->m_len >= MAX_WRITEPAGES_EXTENT_LEN) | |
1926 | return false; | |
1927 | ||
4e7ea81d JK |
1928 | /* Can we merge the block to our big extent? */ |
1929 | if (lblk == map->m_lblk + map->m_len && | |
09930042 | 1930 | (bh->b_state & BH_FLAGS) == map->m_flags) { |
4e7ea81d | 1931 | map->m_len++; |
09930042 | 1932 | return true; |
4e7ea81d | 1933 | } |
09930042 | 1934 | return false; |
4e7ea81d JK |
1935 | } |
1936 | ||
5f1132b2 JK |
1937 | /* |
1938 | * mpage_process_page_bufs - submit page buffers for IO or add them to extent | |
1939 | * | |
1940 | * @mpd - extent of blocks for mapping | |
1941 | * @head - the first buffer in the page | |
1942 | * @bh - buffer we should start processing from | |
1943 | * @lblk - logical number of the block in the file corresponding to @bh | |
1944 | * | |
1945 | * Walk through page buffers from @bh upto @head (exclusive) and either submit | |
1946 | * the page for IO if all buffers in this page were mapped and there's no | |
1947 | * accumulated extent of buffers to map or add buffers in the page to the | |
1948 | * extent of buffers to map. The function returns 1 if the caller can continue | |
1949 | * by processing the next page, 0 if it should stop adding buffers to the | |
1950 | * extent to map because we cannot extend it anymore. It can also return value | |
1951 | * < 0 in case of error during IO submission. | |
1952 | */ | |
1953 | static int mpage_process_page_bufs(struct mpage_da_data *mpd, | |
1954 | struct buffer_head *head, | |
1955 | struct buffer_head *bh, | |
1956 | ext4_lblk_t lblk) | |
4e7ea81d JK |
1957 | { |
1958 | struct inode *inode = mpd->inode; | |
5f1132b2 | 1959 | int err; |
93407472 | 1960 | ext4_lblk_t blocks = (i_size_read(inode) + i_blocksize(inode) - 1) |
4e7ea81d JK |
1961 | >> inode->i_blkbits; |
1962 | ||
c93d8f88 EB |
1963 | if (ext4_verity_in_progress(inode)) |
1964 | blocks = EXT_MAX_BLOCKS; | |
1965 | ||
4e7ea81d JK |
1966 | do { |
1967 | BUG_ON(buffer_locked(bh)); | |
1968 | ||
09930042 | 1969 | if (lblk >= blocks || !mpage_add_bh_to_extent(mpd, lblk, bh)) { |
4e7ea81d JK |
1970 | /* Found extent to map? */ |
1971 | if (mpd->map.m_len) | |
5f1132b2 | 1972 | return 0; |
dddbd6ac JK |
1973 | /* Buffer needs mapping and handle is not started? */ |
1974 | if (!mpd->do_map) | |
1975 | return 0; | |
09930042 | 1976 | /* Everything mapped so far and we hit EOF */ |
5f1132b2 | 1977 | break; |
4e7ea81d | 1978 | } |
4e7ea81d | 1979 | } while (lblk++, (bh = bh->b_this_page) != head); |
5f1132b2 JK |
1980 | /* So far everything mapped? Submit the page for IO. */ |
1981 | if (mpd->map.m_len == 0) { | |
81a0d3e1 | 1982 | err = mpage_submit_folio(mpd, head->b_folio); |
5f1132b2 JK |
1983 | if (err < 0) |
1984 | return err; | |
33483b3b | 1985 | mpage_folio_done(mpd, head->b_folio); |
5f1132b2 | 1986 | } |
6b8ed620 JK |
1987 | if (lblk >= blocks) { |
1988 | mpd->scanned_until_end = 1; | |
1989 | return 0; | |
1990 | } | |
1991 | return 1; | |
4e7ea81d JK |
1992 | } |
1993 | ||
2943fdbc | 1994 | /* |
4da2f6e3 MW |
1995 | * mpage_process_folio - update folio buffers corresponding to changed extent |
1996 | * and may submit fully mapped page for IO | |
1997 | * @mpd: description of extent to map, on return next extent to map | |
1998 | * @folio: Contains these buffers. | |
1999 | * @m_lblk: logical block mapping. | |
2000 | * @m_pblk: corresponding physical mapping. | |
2001 | * @map_bh: determines on return whether this page requires any further | |
2943fdbc | 2002 | * mapping or not. |
4da2f6e3 MW |
2003 | * |
2004 | * Scan given folio buffers corresponding to changed extent and update buffer | |
2943fdbc RH |
2005 | * state according to new extent state. |
2006 | * We map delalloc buffers to their physical location, clear unwritten bits. | |
4da2f6e3 MW |
2007 | * If the given folio is not fully mapped, we update @mpd to the next extent in |
2008 | * the given folio that needs mapping & return @map_bh as true. | |
2943fdbc | 2009 | */ |
4da2f6e3 | 2010 | static int mpage_process_folio(struct mpage_da_data *mpd, struct folio *folio, |
2943fdbc RH |
2011 | ext4_lblk_t *m_lblk, ext4_fsblk_t *m_pblk, |
2012 | bool *map_bh) | |
2013 | { | |
2014 | struct buffer_head *head, *bh; | |
2015 | ext4_io_end_t *io_end = mpd->io_submit.io_end; | |
2016 | ext4_lblk_t lblk = *m_lblk; | |
2017 | ext4_fsblk_t pblock = *m_pblk; | |
2018 | int err = 0; | |
c8cc8816 RH |
2019 | int blkbits = mpd->inode->i_blkbits; |
2020 | ssize_t io_end_size = 0; | |
2021 | struct ext4_io_end_vec *io_end_vec = ext4_last_io_end_vec(io_end); | |
2943fdbc | 2022 | |
4da2f6e3 | 2023 | bh = head = folio_buffers(folio); |
2943fdbc RH |
2024 | do { |
2025 | if (lblk < mpd->map.m_lblk) | |
2026 | continue; | |
2027 | if (lblk >= mpd->map.m_lblk + mpd->map.m_len) { | |
2028 | /* | |
2029 | * Buffer after end of mapped extent. | |
4da2f6e3 | 2030 | * Find next buffer in the folio to map. |
2943fdbc RH |
2031 | */ |
2032 | mpd->map.m_len = 0; | |
2033 | mpd->map.m_flags = 0; | |
c8cc8816 | 2034 | io_end_vec->size += io_end_size; |
2943fdbc | 2035 | |
2943fdbc RH |
2036 | err = mpage_process_page_bufs(mpd, head, bh, lblk); |
2037 | if (err > 0) | |
2038 | err = 0; | |
c8cc8816 RH |
2039 | if (!err && mpd->map.m_len && mpd->map.m_lblk > lblk) { |
2040 | io_end_vec = ext4_alloc_io_end_vec(io_end); | |
4d06bfb9 RH |
2041 | if (IS_ERR(io_end_vec)) { |
2042 | err = PTR_ERR(io_end_vec); | |
2043 | goto out; | |
2044 | } | |
d1e18b88 | 2045 | io_end_vec->offset = (loff_t)mpd->map.m_lblk << blkbits; |
c8cc8816 | 2046 | } |
2943fdbc RH |
2047 | *map_bh = true; |
2048 | goto out; | |
2049 | } | |
2050 | if (buffer_delay(bh)) { | |
2051 | clear_buffer_delay(bh); | |
2052 | bh->b_blocknr = pblock++; | |
2053 | } | |
2054 | clear_buffer_unwritten(bh); | |
c8cc8816 | 2055 | io_end_size += (1 << blkbits); |
2943fdbc | 2056 | } while (lblk++, (bh = bh->b_this_page) != head); |
c8cc8816 RH |
2057 | |
2058 | io_end_vec->size += io_end_size; | |
2943fdbc RH |
2059 | *map_bh = false; |
2060 | out: | |
2061 | *m_lblk = lblk; | |
2062 | *m_pblk = pblock; | |
2063 | return err; | |
2064 | } | |
2065 | ||
4e7ea81d JK |
2066 | /* |
2067 | * mpage_map_buffers - update buffers corresponding to changed extent and | |
2068 | * submit fully mapped pages for IO | |
2069 | * | |
2070 | * @mpd - description of extent to map, on return next extent to map | |
2071 | * | |
2072 | * Scan buffers corresponding to changed extent (we expect corresponding pages | |
2073 | * to be already locked) and update buffer state according to new extent state. | |
2074 | * We map delalloc buffers to their physical location, clear unwritten bits, | |
556615dc | 2075 | * and mark buffers as uninit when we perform writes to unwritten extents |
4e7ea81d JK |
2076 | * and do extent conversion after IO is finished. If the last page is not fully |
2077 | * mapped, we update @map to the next extent in the last page that needs | |
2078 | * mapping. Otherwise we submit the page for IO. | |
2079 | */ | |
2080 | static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd) | |
2081 | { | |
7530d093 MWO |
2082 | struct folio_batch fbatch; |
2083 | unsigned nr, i; | |
4e7ea81d | 2084 | struct inode *inode = mpd->inode; |
09cbfeaf | 2085 | int bpp_bits = PAGE_SHIFT - inode->i_blkbits; |
4e7ea81d JK |
2086 | pgoff_t start, end; |
2087 | ext4_lblk_t lblk; | |
2943fdbc | 2088 | ext4_fsblk_t pblock; |
4e7ea81d | 2089 | int err; |
2943fdbc | 2090 | bool map_bh = false; |
4e7ea81d JK |
2091 | |
2092 | start = mpd->map.m_lblk >> bpp_bits; | |
2093 | end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits; | |
2094 | lblk = start << bpp_bits; | |
2095 | pblock = mpd->map.m_pblk; | |
2096 | ||
7530d093 | 2097 | folio_batch_init(&fbatch); |
4e7ea81d | 2098 | while (start <= end) { |
7530d093 MWO |
2099 | nr = filemap_get_folios(inode->i_mapping, &start, end, &fbatch); |
2100 | if (nr == 0) | |
4e7ea81d | 2101 | break; |
7530d093 | 2102 | for (i = 0; i < nr; i++) { |
4da2f6e3 | 2103 | struct folio *folio = fbatch.folios[i]; |
4e7ea81d | 2104 | |
4da2f6e3 | 2105 | err = mpage_process_folio(mpd, folio, &lblk, &pblock, |
2943fdbc | 2106 | &map_bh); |
4e7ea81d | 2107 | /* |
2943fdbc RH |
2108 | * If map_bh is true, means page may require further bh |
2109 | * mapping, or maybe the page was submitted for IO. | |
2110 | * So we return to call further extent mapping. | |
4e7ea81d | 2111 | */ |
39c0ae16 | 2112 | if (err < 0 || map_bh) |
2943fdbc | 2113 | goto out; |
4e7ea81d | 2114 | /* Page fully mapped - let IO run! */ |
81a0d3e1 | 2115 | err = mpage_submit_folio(mpd, folio); |
2943fdbc RH |
2116 | if (err < 0) |
2117 | goto out; | |
33483b3b | 2118 | mpage_folio_done(mpd, folio); |
4e7ea81d | 2119 | } |
7530d093 | 2120 | folio_batch_release(&fbatch); |
4e7ea81d JK |
2121 | } |
2122 | /* Extent fully mapped and matches with page boundary. We are done. */ | |
2123 | mpd->map.m_len = 0; | |
2124 | mpd->map.m_flags = 0; | |
2125 | return 0; | |
2943fdbc | 2126 | out: |
7530d093 | 2127 | folio_batch_release(&fbatch); |
2943fdbc | 2128 | return err; |
4e7ea81d JK |
2129 | } |
2130 | ||
2131 | static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd) | |
2132 | { | |
2133 | struct inode *inode = mpd->inode; | |
2134 | struct ext4_map_blocks *map = &mpd->map; | |
2135 | int get_blocks_flags; | |
090f32ee | 2136 | int err, dioread_nolock; |
4e7ea81d JK |
2137 | |
2138 | trace_ext4_da_write_pages_extent(inode, map); | |
2139 | /* | |
2140 | * Call ext4_map_blocks() to allocate any delayed allocation blocks, or | |
556615dc | 2141 | * to convert an unwritten extent to be initialized (in the case |
4e7ea81d JK |
2142 | * where we have written into one or more preallocated blocks). It is |
2143 | * possible that we're going to need more metadata blocks than | |
2144 | * previously reserved. However we must not fail because we're in | |
2145 | * writeback and there is nothing we can do about it so it might result | |
2146 | * in data loss. So use reserved blocks to allocate metadata if | |
2147 | * possible. | |
2148 | * | |
754cfed6 TT |
2149 | * We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE if |
2150 | * the blocks in question are delalloc blocks. This indicates | |
2151 | * that the blocks and quotas has already been checked when | |
2152 | * the data was copied into the page cache. | |
4e7ea81d JK |
2153 | */ |
2154 | get_blocks_flags = EXT4_GET_BLOCKS_CREATE | | |
ee0876bc JK |
2155 | EXT4_GET_BLOCKS_METADATA_NOFAIL | |
2156 | EXT4_GET_BLOCKS_IO_SUBMIT; | |
090f32ee LC |
2157 | dioread_nolock = ext4_should_dioread_nolock(inode); |
2158 | if (dioread_nolock) | |
4e7ea81d | 2159 | get_blocks_flags |= EXT4_GET_BLOCKS_IO_CREATE_EXT; |
6db07461 | 2160 | if (map->m_flags & BIT(BH_Delay)) |
4e7ea81d JK |
2161 | get_blocks_flags |= EXT4_GET_BLOCKS_DELALLOC_RESERVE; |
2162 | ||
2163 | err = ext4_map_blocks(handle, inode, map, get_blocks_flags); | |
2164 | if (err < 0) | |
2165 | return err; | |
090f32ee | 2166 | if (dioread_nolock && (map->m_flags & EXT4_MAP_UNWRITTEN)) { |
6b523df4 JK |
2167 | if (!mpd->io_submit.io_end->handle && |
2168 | ext4_handle_valid(handle)) { | |
2169 | mpd->io_submit.io_end->handle = handle->h_rsv_handle; | |
2170 | handle->h_rsv_handle = NULL; | |
2171 | } | |
3613d228 | 2172 | ext4_set_io_unwritten_flag(inode, mpd->io_submit.io_end); |
6b523df4 | 2173 | } |
4e7ea81d JK |
2174 | |
2175 | BUG_ON(map->m_len == 0); | |
4e7ea81d JK |
2176 | return 0; |
2177 | } | |
2178 | ||
2179 | /* | |
2180 | * mpage_map_and_submit_extent - map extent starting at mpd->lblk of length | |
2181 | * mpd->len and submit pages underlying it for IO | |
2182 | * | |
2183 | * @handle - handle for journal operations | |
2184 | * @mpd - extent to map | |
7534e854 JK |
2185 | * @give_up_on_write - we set this to true iff there is a fatal error and there |
2186 | * is no hope of writing the data. The caller should discard | |
2187 | * dirty pages to avoid infinite loops. | |
4e7ea81d JK |
2188 | * |
2189 | * The function maps extent starting at mpd->lblk of length mpd->len. If it is | |
2190 | * delayed, blocks are allocated, if it is unwritten, we may need to convert | |
2191 | * them to initialized or split the described range from larger unwritten | |
2192 | * extent. Note that we need not map all the described range since allocation | |
2193 | * can return less blocks or the range is covered by more unwritten extents. We | |
2194 | * cannot map more because we are limited by reserved transaction credits. On | |
2195 | * the other hand we always make sure that the last touched page is fully | |
2196 | * mapped so that it can be written out (and thus forward progress is | |
2197 | * guaranteed). After mapping we submit all mapped pages for IO. | |
2198 | */ | |
2199 | static int mpage_map_and_submit_extent(handle_t *handle, | |
cb530541 TT |
2200 | struct mpage_da_data *mpd, |
2201 | bool *give_up_on_write) | |
4e7ea81d JK |
2202 | { |
2203 | struct inode *inode = mpd->inode; | |
2204 | struct ext4_map_blocks *map = &mpd->map; | |
2205 | int err; | |
2206 | loff_t disksize; | |
6603120e | 2207 | int progress = 0; |
c8cc8816 | 2208 | ext4_io_end_t *io_end = mpd->io_submit.io_end; |
4d06bfb9 | 2209 | struct ext4_io_end_vec *io_end_vec; |
4e7ea81d | 2210 | |
4d06bfb9 RH |
2211 | io_end_vec = ext4_alloc_io_end_vec(io_end); |
2212 | if (IS_ERR(io_end_vec)) | |
2213 | return PTR_ERR(io_end_vec); | |
c8cc8816 | 2214 | io_end_vec->offset = ((loff_t)map->m_lblk) << inode->i_blkbits; |
27d7c4ed | 2215 | do { |
4e7ea81d JK |
2216 | err = mpage_map_one_extent(handle, mpd); |
2217 | if (err < 0) { | |
2218 | struct super_block *sb = inode->i_sb; | |
2219 | ||
95257987 | 2220 | if (ext4_forced_shutdown(sb)) |
cb530541 | 2221 | goto invalidate_dirty_pages; |
4e7ea81d | 2222 | /* |
cb530541 TT |
2223 | * Let the uper layers retry transient errors. |
2224 | * In the case of ENOSPC, if ext4_count_free_blocks() | |
2225 | * is non-zero, a commit should free up blocks. | |
4e7ea81d | 2226 | */ |
cb530541 | 2227 | if ((err == -ENOMEM) || |
6603120e DM |
2228 | (err == -ENOSPC && ext4_count_free_clusters(sb))) { |
2229 | if (progress) | |
2230 | goto update_disksize; | |
cb530541 | 2231 | return err; |
6603120e | 2232 | } |
cb530541 TT |
2233 | ext4_msg(sb, KERN_CRIT, |
2234 | "Delayed block allocation failed for " | |
2235 | "inode %lu at logical offset %llu with" | |
2236 | " max blocks %u with error %d", | |
2237 | inode->i_ino, | |
2238 | (unsigned long long)map->m_lblk, | |
2239 | (unsigned)map->m_len, -err); | |
2240 | ext4_msg(sb, KERN_CRIT, | |
2241 | "This should not happen!! Data will " | |
2242 | "be lost\n"); | |
2243 | if (err == -ENOSPC) | |
2244 | ext4_print_free_blocks(inode); | |
2245 | invalidate_dirty_pages: | |
2246 | *give_up_on_write = true; | |
4e7ea81d JK |
2247 | return err; |
2248 | } | |
6603120e | 2249 | progress = 1; |
4e7ea81d JK |
2250 | /* |
2251 | * Update buffer state, submit mapped pages, and get us new | |
2252 | * extent to map | |
2253 | */ | |
2254 | err = mpage_map_and_submit_buffers(mpd); | |
2255 | if (err < 0) | |
6603120e | 2256 | goto update_disksize; |
27d7c4ed | 2257 | } while (map->m_len); |
4e7ea81d | 2258 | |
6603120e | 2259 | update_disksize: |
622cad13 TT |
2260 | /* |
2261 | * Update on-disk size after IO is submitted. Races with | |
2262 | * truncate are avoided by checking i_size under i_data_sem. | |
2263 | */ | |
09cbfeaf | 2264 | disksize = ((loff_t)mpd->first_page) << PAGE_SHIFT; |
35df4299 | 2265 | if (disksize > READ_ONCE(EXT4_I(inode)->i_disksize)) { |
4e7ea81d | 2266 | int err2; |
622cad13 TT |
2267 | loff_t i_size; |
2268 | ||
2269 | down_write(&EXT4_I(inode)->i_data_sem); | |
2270 | i_size = i_size_read(inode); | |
2271 | if (disksize > i_size) | |
2272 | disksize = i_size; | |
2273 | if (disksize > EXT4_I(inode)->i_disksize) | |
2274 | EXT4_I(inode)->i_disksize = disksize; | |
622cad13 | 2275 | up_write(&EXT4_I(inode)->i_data_sem); |
b907f2d5 | 2276 | err2 = ext4_mark_inode_dirty(handle, inode); |
878520ac | 2277 | if (err2) { |
54d3adbc TT |
2278 | ext4_error_err(inode->i_sb, -err2, |
2279 | "Failed to mark inode %lu dirty", | |
2280 | inode->i_ino); | |
878520ac | 2281 | } |
4e7ea81d JK |
2282 | if (!err) |
2283 | err = err2; | |
2284 | } | |
2285 | return err; | |
2286 | } | |
2287 | ||
fffb2739 JK |
2288 | /* |
2289 | * Calculate the total number of credits to reserve for one writepages | |
20970ba6 | 2290 | * iteration. This is called from ext4_writepages(). We map an extent of |
70261f56 | 2291 | * up to MAX_WRITEPAGES_EXTENT_LEN blocks and then we go on and finish mapping |
fffb2739 JK |
2292 | * the last partial page. So in total we can map MAX_WRITEPAGES_EXTENT_LEN + |
2293 | * bpp - 1 blocks in bpp different extents. | |
2294 | */ | |
525f4ed8 MC |
2295 | static int ext4_da_writepages_trans_blocks(struct inode *inode) |
2296 | { | |
fffb2739 | 2297 | int bpp = ext4_journal_blocks_per_page(inode); |
525f4ed8 | 2298 | |
fffb2739 JK |
2299 | return ext4_meta_trans_blocks(inode, |
2300 | MAX_WRITEPAGES_EXTENT_LEN + bpp - 1, bpp); | |
525f4ed8 | 2301 | } |
61628a3f | 2302 | |
80be8c5c RH |
2303 | static int ext4_journal_folio_buffers(handle_t *handle, struct folio *folio, |
2304 | size_t len) | |
3f079114 | 2305 | { |
80be8c5c RH |
2306 | struct buffer_head *page_bufs = folio_buffers(folio); |
2307 | struct inode *inode = folio->mapping->host; | |
3f079114 JK |
2308 | int ret, err; |
2309 | ||
2310 | ret = ext4_walk_page_buffers(handle, inode, page_bufs, 0, len, | |
2311 | NULL, do_journal_get_write_access); | |
2312 | err = ext4_walk_page_buffers(handle, inode, page_bufs, 0, len, | |
2313 | NULL, write_end_fn); | |
2314 | if (ret == 0) | |
2315 | ret = err; | |
80be8c5c | 2316 | err = ext4_jbd2_inode_add_write(handle, inode, folio_pos(folio), len); |
3f079114 JK |
2317 | if (ret == 0) |
2318 | ret = err; | |
2319 | EXT4_I(inode)->i_datasync_tid = handle->h_transaction->t_tid; | |
2320 | ||
3f079114 JK |
2321 | return ret; |
2322 | } | |
2323 | ||
2324 | static int mpage_journal_page_buffers(handle_t *handle, | |
2325 | struct mpage_da_data *mpd, | |
80be8c5c | 2326 | struct folio *folio) |
3f079114 JK |
2327 | { |
2328 | struct inode *inode = mpd->inode; | |
2329 | loff_t size = i_size_read(inode); | |
80be8c5c | 2330 | size_t len = folio_size(folio); |
3f079114 | 2331 | |
80be8c5c | 2332 | folio_clear_checked(folio); |
3f079114 JK |
2333 | mpd->wbc->nr_to_write--; |
2334 | ||
80be8c5c | 2335 | if (folio_pos(folio) + len > size && |
3f079114 | 2336 | !ext4_verity_in_progress(inode)) |
80be8c5c | 2337 | len = size - folio_pos(folio); |
3f079114 | 2338 | |
80be8c5c | 2339 | return ext4_journal_folio_buffers(handle, folio, len); |
3f079114 JK |
2340 | } |
2341 | ||
8e48dcfb | 2342 | /* |
4e7ea81d | 2343 | * mpage_prepare_extent_to_map - find & lock contiguous range of dirty pages |
de0039f6 | 2344 | * needing mapping, submit mapped pages |
4e7ea81d JK |
2345 | * |
2346 | * @mpd - where to look for pages | |
2347 | * | |
2348 | * Walk dirty pages in the mapping. If they are fully mapped, submit them for | |
de0039f6 JK |
2349 | * IO immediately. If we cannot map blocks, we submit just already mapped |
2350 | * buffers in the page for IO and keep page dirty. When we can map blocks and | |
2351 | * we find a page which isn't mapped we start accumulating extent of buffers | |
2352 | * underlying these pages that needs mapping (formed by either delayed or | |
2353 | * unwritten buffers). We also lock the pages containing these buffers. The | |
2354 | * extent found is returned in @mpd structure (starting at mpd->lblk with | |
2355 | * length mpd->len blocks). | |
4e7ea81d JK |
2356 | * |
2357 | * Note that this function can attach bios to one io_end structure which are | |
2358 | * neither logically nor physically contiguous. Although it may seem as an | |
2359 | * unnecessary complication, it is actually inevitable in blocksize < pagesize | |
2360 | * case as we need to track IO to all buffers underlying a page in one io_end. | |
8e48dcfb | 2361 | */ |
4e7ea81d | 2362 | static int mpage_prepare_extent_to_map(struct mpage_da_data *mpd) |
8e48dcfb | 2363 | { |
4e7ea81d | 2364 | struct address_space *mapping = mpd->inode->i_mapping; |
50ead253 VMO |
2365 | struct folio_batch fbatch; |
2366 | unsigned int nr_folios; | |
4e7ea81d JK |
2367 | pgoff_t index = mpd->first_page; |
2368 | pgoff_t end = mpd->last_page; | |
10bbd235 | 2369 | xa_mark_t tag; |
4e7ea81d JK |
2370 | int i, err = 0; |
2371 | int blkbits = mpd->inode->i_blkbits; | |
2372 | ext4_lblk_t lblk; | |
2373 | struct buffer_head *head; | |
3f079114 JK |
2374 | handle_t *handle = NULL; |
2375 | int bpp = ext4_journal_blocks_per_page(mpd->inode); | |
8e48dcfb | 2376 | |
4e7ea81d | 2377 | if (mpd->wbc->sync_mode == WB_SYNC_ALL || mpd->wbc->tagged_writepages) |
5b41d924 ES |
2378 | tag = PAGECACHE_TAG_TOWRITE; |
2379 | else | |
2380 | tag = PAGECACHE_TAG_DIRTY; | |
3f079114 | 2381 | |
e6c28a26 JK |
2382 | mpd->map.m_len = 0; |
2383 | mpd->next_page = index; | |
d0ab8368 | 2384 | if (ext4_should_journal_data(mpd->inode)) { |
3f079114 JK |
2385 | handle = ext4_journal_start(mpd->inode, EXT4_HT_WRITE_PAGE, |
2386 | bpp); | |
2387 | if (IS_ERR(handle)) | |
2388 | return PTR_ERR(handle); | |
2389 | } | |
50ead253 | 2390 | folio_batch_init(&fbatch); |
4f01b02c | 2391 | while (index <= end) { |
50ead253 VMO |
2392 | nr_folios = filemap_get_folios_tag(mapping, &index, end, |
2393 | tag, &fbatch); | |
2394 | if (nr_folios == 0) | |
6b8ed620 | 2395 | break; |
8e48dcfb | 2396 | |
50ead253 VMO |
2397 | for (i = 0; i < nr_folios; i++) { |
2398 | struct folio *folio = fbatch.folios[i]; | |
8e48dcfb | 2399 | |
aeac589a ML |
2400 | /* |
2401 | * Accumulated enough dirty pages? This doesn't apply | |
2402 | * to WB_SYNC_ALL mode. For integrity sync we have to | |
2403 | * keep going because someone may be concurrently | |
2404 | * dirtying pages, and we might have synced a lot of | |
2405 | * newly appeared dirty pages, but have not synced all | |
2406 | * of the old dirty pages. | |
2407 | */ | |
c8e8e16d JK |
2408 | if (mpd->wbc->sync_mode == WB_SYNC_NONE && |
2409 | mpd->wbc->nr_to_write <= | |
2410 | mpd->map.m_len >> (PAGE_SHIFT - blkbits)) | |
aeac589a ML |
2411 | goto out; |
2412 | ||
4e7ea81d | 2413 | /* If we can't merge this page, we are done. */ |
50ead253 | 2414 | if (mpd->map.m_len > 0 && mpd->next_page != folio->index) |
4e7ea81d | 2415 | goto out; |
78aaced3 | 2416 | |
3f079114 JK |
2417 | if (handle) { |
2418 | err = ext4_journal_ensure_credits(handle, bpp, | |
2419 | 0); | |
2420 | if (err < 0) | |
2421 | goto out; | |
2422 | } | |
2423 | ||
50ead253 | 2424 | folio_lock(folio); |
8e48dcfb | 2425 | /* |
4e7ea81d JK |
2426 | * If the page is no longer dirty, or its mapping no |
2427 | * longer corresponds to inode we are writing (which | |
2428 | * means it has been truncated or invalidated), or the | |
2429 | * page is already under writeback and we are not doing | |
2430 | * a data integrity writeback, skip the page | |
8e48dcfb | 2431 | */ |
50ead253 VMO |
2432 | if (!folio_test_dirty(folio) || |
2433 | (folio_test_writeback(folio) && | |
4e7ea81d | 2434 | (mpd->wbc->sync_mode == WB_SYNC_NONE)) || |
50ead253 VMO |
2435 | unlikely(folio->mapping != mapping)) { |
2436 | folio_unlock(folio); | |
8e48dcfb TT |
2437 | continue; |
2438 | } | |
2439 | ||
50ead253 VMO |
2440 | folio_wait_writeback(folio); |
2441 | BUG_ON(folio_test_writeback(folio)); | |
8e48dcfb | 2442 | |
cc509574 TT |
2443 | /* |
2444 | * Should never happen but for buggy code in | |
2445 | * other subsystems that call | |
2446 | * set_page_dirty() without properly warning | |
2447 | * the file system first. See [1] for more | |
2448 | * information. | |
2449 | * | |
2450 | * [1] https://lore.kernel.org/linux-mm/20180103100430.GE4911@quack2.suse.cz | |
2451 | */ | |
50ead253 VMO |
2452 | if (!folio_buffers(folio)) { |
2453 | ext4_warning_inode(mpd->inode, "page %lu does not have buffers attached", folio->index); | |
2454 | folio_clear_dirty(folio); | |
2455 | folio_unlock(folio); | |
cc509574 TT |
2456 | continue; |
2457 | } | |
2458 | ||
4e7ea81d | 2459 | if (mpd->map.m_len == 0) |
50ead253 | 2460 | mpd->first_page = folio->index; |
87b11f86 | 2461 | mpd->next_page = folio_next_index(folio); |
de0039f6 | 2462 | /* |
3f079114 JK |
2463 | * Writeout when we cannot modify metadata is simple. |
2464 | * Just submit the page. For data=journal mode we | |
2465 | * first handle writeout of the page for checkpoint and | |
2466 | * only after that handle delayed page dirtying. This | |
ab382539 JK |
2467 | * makes sure current data is checkpointed to the final |
2468 | * location before possibly journalling it again which | |
2469 | * is desirable when the page is frequently dirtied | |
2470 | * through a pin. | |
de0039f6 JK |
2471 | */ |
2472 | if (!mpd->can_map) { | |
5e1bdea6 JK |
2473 | err = mpage_submit_folio(mpd, folio); |
2474 | if (err < 0) | |
2475 | goto out; | |
3f079114 | 2476 | /* Pending dirtying of journalled data? */ |
81a0d3e1 | 2477 | if (folio_test_checked(folio)) { |
3f079114 | 2478 | err = mpage_journal_page_buffers(handle, |
80be8c5c | 2479 | mpd, folio); |
3f079114 JK |
2480 | if (err < 0) |
2481 | goto out; | |
1f1a55f0 | 2482 | mpd->journalled_more_data = 1; |
3f079114 | 2483 | } |
33483b3b | 2484 | mpage_folio_done(mpd, folio); |
de0039f6 JK |
2485 | } else { |
2486 | /* Add all dirty buffers to mpd */ | |
50ead253 | 2487 | lblk = ((ext4_lblk_t)folio->index) << |
de0039f6 | 2488 | (PAGE_SHIFT - blkbits); |
50ead253 | 2489 | head = folio_buffers(folio); |
de0039f6 | 2490 | err = mpage_process_page_bufs(mpd, head, head, |
50ead253 | 2491 | lblk); |
de0039f6 JK |
2492 | if (err <= 0) |
2493 | goto out; | |
2494 | err = 0; | |
2495 | } | |
8e48dcfb | 2496 | } |
50ead253 | 2497 | folio_batch_release(&fbatch); |
8e48dcfb TT |
2498 | cond_resched(); |
2499 | } | |
6b8ed620 | 2500 | mpd->scanned_until_end = 1; |
3f079114 JK |
2501 | if (handle) |
2502 | ext4_journal_stop(handle); | |
4f01b02c | 2503 | return 0; |
8eb9e5ce | 2504 | out: |
50ead253 | 2505 | folio_batch_release(&fbatch); |
3f079114 JK |
2506 | if (handle) |
2507 | ext4_journal_stop(handle); | |
4e7ea81d | 2508 | return err; |
8e48dcfb TT |
2509 | } |
2510 | ||
15648d59 | 2511 | static int ext4_do_writepages(struct mpage_da_data *mpd) |
64769240 | 2512 | { |
15648d59 | 2513 | struct writeback_control *wbc = mpd->wbc; |
4e7ea81d JK |
2514 | pgoff_t writeback_index = 0; |
2515 | long nr_to_write = wbc->nr_to_write; | |
22208ded | 2516 | int range_whole = 0; |
4e7ea81d | 2517 | int cycled = 1; |
61628a3f | 2518 | handle_t *handle = NULL; |
15648d59 JK |
2519 | struct inode *inode = mpd->inode; |
2520 | struct address_space *mapping = inode->i_mapping; | |
6b523df4 | 2521 | int needed_blocks, rsv_blocks = 0, ret = 0; |
5e745b04 | 2522 | struct ext4_sb_info *sbi = EXT4_SB(mapping->host->i_sb); |
1bce63d1 | 2523 | struct blk_plug plug; |
cb530541 | 2524 | bool give_up_on_write = false; |
61628a3f | 2525 | |
20970ba6 | 2526 | trace_ext4_writepages(inode, wbc); |
ba80b101 | 2527 | |
61628a3f MC |
2528 | /* |
2529 | * No pages to write? This is mainly a kludge to avoid starting | |
2530 | * a transaction for special inodes like journal inode on last iput() | |
2531 | * because that could violate lock ordering on umount | |
2532 | */ | |
a1d6cc56 | 2533 | if (!mapping->nrpages || !mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) |
bbf023c7 | 2534 | goto out_writepages; |
2a21e37e TT |
2535 | |
2536 | /* | |
2537 | * If the filesystem has aborted, it is read-only, so return | |
2538 | * right away instead of dumping stack traces later on that | |
2539 | * will obscure the real source of the problem. We test | |
95257987 | 2540 | * fs shutdown state instead of sb->s_flag's SB_RDONLY because |
2a21e37e | 2541 | * the latter could be true if the filesystem is mounted |
20970ba6 | 2542 | * read-only, and in that case, ext4_writepages should |
2a21e37e TT |
2543 | * *never* be called, so if that ever happens, we would want |
2544 | * the stack trace. | |
2545 | */ | |
95257987 | 2546 | if (unlikely(ext4_forced_shutdown(mapping->host->i_sb))) { |
bbf023c7 ML |
2547 | ret = -EROFS; |
2548 | goto out_writepages; | |
2549 | } | |
2a21e37e | 2550 | |
4e7ea81d JK |
2551 | /* |
2552 | * If we have inline data and arrive here, it means that | |
2553 | * we will soon create the block for the 1st page, so | |
2554 | * we'd better clear the inline data here. | |
2555 | */ | |
2556 | if (ext4_has_inline_data(inode)) { | |
2557 | /* Just inode will be modified... */ | |
2558 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); | |
2559 | if (IS_ERR(handle)) { | |
2560 | ret = PTR_ERR(handle); | |
2561 | goto out_writepages; | |
2562 | } | |
2563 | BUG_ON(ext4_test_inode_state(inode, | |
2564 | EXT4_STATE_MAY_INLINE_DATA)); | |
2565 | ext4_destroy_inline_data(handle, inode); | |
2566 | ext4_journal_stop(handle); | |
2567 | } | |
2568 | ||
3f079114 JK |
2569 | /* |
2570 | * data=journal mode does not do delalloc so we just need to writeout / | |
1f1a55f0 JK |
2571 | * journal already mapped buffers. On the other hand we need to commit |
2572 | * transaction to make data stable. We expect all the data to be | |
2573 | * already in the journal (the only exception are DMA pinned pages | |
2574 | * dirtied behind our back) so we commit transaction here and run the | |
2575 | * writeback loop to checkpoint them. The checkpointing is not actually | |
2576 | * necessary to make data persistent *but* quite a few places (extent | |
2577 | * shifting operations, fsverity, ...) depend on being able to drop | |
2578 | * pagecache pages after calling filemap_write_and_wait() and for that | |
2579 | * checkpointing needs to happen. | |
3f079114 | 2580 | */ |
1f1a55f0 | 2581 | if (ext4_should_journal_data(inode)) { |
3f079114 | 2582 | mpd->can_map = 0; |
1f1a55f0 JK |
2583 | if (wbc->sync_mode == WB_SYNC_ALL) |
2584 | ext4_fc_commit(sbi->s_journal, | |
2585 | EXT4_I(inode)->i_datasync_tid); | |
2586 | } | |
2587 | mpd->journalled_more_data = 0; | |
3f079114 | 2588 | |
4e343231 | 2589 | if (ext4_should_dioread_nolock(inode)) { |
2590 | /* | |
2591 | * We may need to convert up to one extent per block in | |
2592 | * the page and we may dirty the inode. | |
2593 | */ | |
2594 | rsv_blocks = 1 + ext4_chunk_trans_blocks(inode, | |
2595 | PAGE_SIZE >> inode->i_blkbits); | |
2596 | } | |
2597 | ||
22208ded AK |
2598 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
2599 | range_whole = 1; | |
61628a3f | 2600 | |
2acf2c26 | 2601 | if (wbc->range_cyclic) { |
4e7ea81d JK |
2602 | writeback_index = mapping->writeback_index; |
2603 | if (writeback_index) | |
2acf2c26 | 2604 | cycled = 0; |
15648d59 JK |
2605 | mpd->first_page = writeback_index; |
2606 | mpd->last_page = -1; | |
5b41d924 | 2607 | } else { |
15648d59 JK |
2608 | mpd->first_page = wbc->range_start >> PAGE_SHIFT; |
2609 | mpd->last_page = wbc->range_end >> PAGE_SHIFT; | |
5b41d924 | 2610 | } |
a1d6cc56 | 2611 | |
15648d59 | 2612 | ext4_io_submit_init(&mpd->io_submit, wbc); |
2acf2c26 | 2613 | retry: |
6e6938b6 | 2614 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) |
15648d59 JK |
2615 | tag_pages_for_writeback(mapping, mpd->first_page, |
2616 | mpd->last_page); | |
1bce63d1 | 2617 | blk_start_plug(&plug); |
dddbd6ac JK |
2618 | |
2619 | /* | |
2620 | * First writeback pages that don't need mapping - we can avoid | |
2621 | * starting a transaction unnecessarily and also avoid being blocked | |
2622 | * in the block layer on device congestion while having transaction | |
2623 | * started. | |
2624 | */ | |
15648d59 JK |
2625 | mpd->do_map = 0; |
2626 | mpd->scanned_until_end = 0; | |
2627 | mpd->io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL); | |
2628 | if (!mpd->io_submit.io_end) { | |
dddbd6ac JK |
2629 | ret = -ENOMEM; |
2630 | goto unplug; | |
2631 | } | |
15648d59 | 2632 | ret = mpage_prepare_extent_to_map(mpd); |
a297b2fc | 2633 | /* Unlock pages we didn't use */ |
15648d59 | 2634 | mpage_release_unused_pages(mpd, false); |
dddbd6ac | 2635 | /* Submit prepared bio */ |
15648d59 JK |
2636 | ext4_io_submit(&mpd->io_submit); |
2637 | ext4_put_io_end_defer(mpd->io_submit.io_end); | |
2638 | mpd->io_submit.io_end = NULL; | |
dddbd6ac JK |
2639 | if (ret < 0) |
2640 | goto unplug; | |
2641 | ||
15648d59 | 2642 | while (!mpd->scanned_until_end && wbc->nr_to_write > 0) { |
4e7ea81d | 2643 | /* For each extent of pages we use new io_end */ |
15648d59 JK |
2644 | mpd->io_submit.io_end = ext4_init_io_end(inode, GFP_KERNEL); |
2645 | if (!mpd->io_submit.io_end) { | |
4e7ea81d JK |
2646 | ret = -ENOMEM; |
2647 | break; | |
2648 | } | |
a1d6cc56 | 2649 | |
de0039f6 | 2650 | WARN_ON_ONCE(!mpd->can_map); |
a1d6cc56 | 2651 | /* |
4e7ea81d JK |
2652 | * We have two constraints: We find one extent to map and we |
2653 | * must always write out whole page (makes a difference when | |
2654 | * blocksize < pagesize) so that we don't block on IO when we | |
2655 | * try to write out the rest of the page. Journalled mode is | |
2656 | * not supported by delalloc. | |
a1d6cc56 AK |
2657 | */ |
2658 | BUG_ON(ext4_should_journal_data(inode)); | |
525f4ed8 | 2659 | needed_blocks = ext4_da_writepages_trans_blocks(inode); |
a1d6cc56 | 2660 | |
4e7ea81d | 2661 | /* start a new transaction */ |
6b523df4 JK |
2662 | handle = ext4_journal_start_with_reserve(inode, |
2663 | EXT4_HT_WRITE_PAGE, needed_blocks, rsv_blocks); | |
61628a3f MC |
2664 | if (IS_ERR(handle)) { |
2665 | ret = PTR_ERR(handle); | |
1693918e | 2666 | ext4_msg(inode->i_sb, KERN_CRIT, "%s: jbd2_start: " |
fbe845dd | 2667 | "%ld pages, ino %lu; err %d", __func__, |
a1d6cc56 | 2668 | wbc->nr_to_write, inode->i_ino, ret); |
4e7ea81d | 2669 | /* Release allocated io_end */ |
15648d59 JK |
2670 | ext4_put_io_end(mpd->io_submit.io_end); |
2671 | mpd->io_submit.io_end = NULL; | |
4e7ea81d | 2672 | break; |
61628a3f | 2673 | } |
15648d59 | 2674 | mpd->do_map = 1; |
f63e6005 | 2675 | |
15648d59 JK |
2676 | trace_ext4_da_write_pages(inode, mpd->first_page, wbc); |
2677 | ret = mpage_prepare_extent_to_map(mpd); | |
2678 | if (!ret && mpd->map.m_len) | |
2679 | ret = mpage_map_and_submit_extent(handle, mpd, | |
cb530541 | 2680 | &give_up_on_write); |
646caa9c JK |
2681 | /* |
2682 | * Caution: If the handle is synchronous, | |
2683 | * ext4_journal_stop() can wait for transaction commit | |
2684 | * to finish which may depend on writeback of pages to | |
2685 | * complete or on page lock to be released. In that | |
b483bb77 | 2686 | * case, we have to wait until after we have |
646caa9c JK |
2687 | * submitted all the IO, released page locks we hold, |
2688 | * and dropped io_end reference (for extent conversion | |
2689 | * to be able to complete) before stopping the handle. | |
2690 | */ | |
2691 | if (!ext4_handle_valid(handle) || handle->h_sync == 0) { | |
2692 | ext4_journal_stop(handle); | |
2693 | handle = NULL; | |
15648d59 | 2694 | mpd->do_map = 0; |
646caa9c | 2695 | } |
4e7ea81d | 2696 | /* Unlock pages we didn't use */ |
15648d59 | 2697 | mpage_release_unused_pages(mpd, give_up_on_write); |
a297b2fc | 2698 | /* Submit prepared bio */ |
15648d59 | 2699 | ext4_io_submit(&mpd->io_submit); |
a297b2fc | 2700 | |
646caa9c JK |
2701 | /* |
2702 | * Drop our io_end reference we got from init. We have | |
2703 | * to be careful and use deferred io_end finishing if | |
2704 | * we are still holding the transaction as we can | |
2705 | * release the last reference to io_end which may end | |
2706 | * up doing unwritten extent conversion. | |
2707 | */ | |
2708 | if (handle) { | |
15648d59 | 2709 | ext4_put_io_end_defer(mpd->io_submit.io_end); |
646caa9c JK |
2710 | ext4_journal_stop(handle); |
2711 | } else | |
15648d59 JK |
2712 | ext4_put_io_end(mpd->io_submit.io_end); |
2713 | mpd->io_submit.io_end = NULL; | |
4e7ea81d JK |
2714 | |
2715 | if (ret == -ENOSPC && sbi->s_journal) { | |
2716 | /* | |
2717 | * Commit the transaction which would | |
22208ded AK |
2718 | * free blocks released in the transaction |
2719 | * and try again | |
2720 | */ | |
df22291f | 2721 | jbd2_journal_force_commit_nested(sbi->s_journal); |
22208ded | 2722 | ret = 0; |
4e7ea81d JK |
2723 | continue; |
2724 | } | |
2725 | /* Fatal error - ENOMEM, EIO... */ | |
2726 | if (ret) | |
61628a3f | 2727 | break; |
a1d6cc56 | 2728 | } |
dddbd6ac | 2729 | unplug: |
1bce63d1 | 2730 | blk_finish_plug(&plug); |
9c12a831 | 2731 | if (!ret && !cycled && wbc->nr_to_write > 0) { |
2acf2c26 | 2732 | cycled = 1; |
15648d59 JK |
2733 | mpd->last_page = writeback_index - 1; |
2734 | mpd->first_page = 0; | |
2acf2c26 AK |
2735 | goto retry; |
2736 | } | |
22208ded AK |
2737 | |
2738 | /* Update index */ | |
22208ded AK |
2739 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) |
2740 | /* | |
4e7ea81d | 2741 | * Set the writeback_index so that range_cyclic |
22208ded AK |
2742 | * mode will write it back later |
2743 | */ | |
15648d59 | 2744 | mapping->writeback_index = mpd->first_page; |
a1d6cc56 | 2745 | |
61628a3f | 2746 | out_writepages: |
20970ba6 TT |
2747 | trace_ext4_writepages_result(inode, wbc, ret, |
2748 | nr_to_write - wbc->nr_to_write); | |
61628a3f | 2749 | return ret; |
64769240 AT |
2750 | } |
2751 | ||
15648d59 JK |
2752 | static int ext4_writepages(struct address_space *mapping, |
2753 | struct writeback_control *wbc) | |
2754 | { | |
29bc9cea | 2755 | struct super_block *sb = mapping->host->i_sb; |
15648d59 JK |
2756 | struct mpage_da_data mpd = { |
2757 | .inode = mapping->host, | |
2758 | .wbc = wbc, | |
2759 | .can_map = 1, | |
2760 | }; | |
29bc9cea | 2761 | int ret; |
00d873c1 | 2762 | int alloc_ctx; |
29bc9cea | 2763 | |
eb8ab444 | 2764 | if (unlikely(ext4_forced_shutdown(sb))) |
29bc9cea | 2765 | return -EIO; |
15648d59 | 2766 | |
00d873c1 | 2767 | alloc_ctx = ext4_writepages_down_read(sb); |
29bc9cea | 2768 | ret = ext4_do_writepages(&mpd); |
1f1a55f0 JK |
2769 | /* |
2770 | * For data=journal writeback we could have come across pages marked | |
2771 | * for delayed dirtying (PageChecked) which were just added to the | |
2772 | * running transaction. Try once more to get them to stable storage. | |
2773 | */ | |
2774 | if (!ret && mpd.journalled_more_data) | |
2775 | ret = ext4_do_writepages(&mpd); | |
00d873c1 | 2776 | ext4_writepages_up_read(sb, alloc_ctx); |
29bc9cea JK |
2777 | |
2778 | return ret; | |
15648d59 JK |
2779 | } |
2780 | ||
59205c8d JK |
2781 | int ext4_normal_submit_inode_data_buffers(struct jbd2_inode *jinode) |
2782 | { | |
2783 | struct writeback_control wbc = { | |
2784 | .sync_mode = WB_SYNC_ALL, | |
2785 | .nr_to_write = LONG_MAX, | |
2786 | .range_start = jinode->i_dirty_start, | |
2787 | .range_end = jinode->i_dirty_end, | |
2788 | }; | |
2789 | struct mpage_da_data mpd = { | |
2790 | .inode = jinode->i_vfs_inode, | |
2791 | .wbc = &wbc, | |
2792 | .can_map = 0, | |
2793 | }; | |
2794 | return ext4_do_writepages(&mpd); | |
2795 | } | |
2796 | ||
5f0663bb DW |
2797 | static int ext4_dax_writepages(struct address_space *mapping, |
2798 | struct writeback_control *wbc) | |
2799 | { | |
2800 | int ret; | |
2801 | long nr_to_write = wbc->nr_to_write; | |
2802 | struct inode *inode = mapping->host; | |
00d873c1 | 2803 | int alloc_ctx; |
5f0663bb | 2804 | |
eb8ab444 | 2805 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
5f0663bb DW |
2806 | return -EIO; |
2807 | ||
00d873c1 | 2808 | alloc_ctx = ext4_writepages_down_read(inode->i_sb); |
5f0663bb DW |
2809 | trace_ext4_writepages(inode, wbc); |
2810 | ||
eb8ab444 JK |
2811 | ret = dax_writeback_mapping_range(mapping, |
2812 | EXT4_SB(inode->i_sb)->s_daxdev, wbc); | |
5f0663bb DW |
2813 | trace_ext4_writepages_result(inode, wbc, ret, |
2814 | nr_to_write - wbc->nr_to_write); | |
00d873c1 | 2815 | ext4_writepages_up_read(inode->i_sb, alloc_ctx); |
5f0663bb DW |
2816 | return ret; |
2817 | } | |
2818 | ||
79f0be8d AK |
2819 | static int ext4_nonda_switch(struct super_block *sb) |
2820 | { | |
5c1ff336 | 2821 | s64 free_clusters, dirty_clusters; |
79f0be8d AK |
2822 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
2823 | ||
2824 | /* | |
2825 | * switch to non delalloc mode if we are running low | |
2826 | * on free block. The free block accounting via percpu | |
179f7ebf | 2827 | * counters can get slightly wrong with percpu_counter_batch getting |
79f0be8d AK |
2828 | * accumulated on each CPU without updating global counters |
2829 | * Delalloc need an accurate free block accounting. So switch | |
2830 | * to non delalloc when we are near to error range. | |
2831 | */ | |
5c1ff336 EW |
2832 | free_clusters = |
2833 | percpu_counter_read_positive(&sbi->s_freeclusters_counter); | |
2834 | dirty_clusters = | |
2835 | percpu_counter_read_positive(&sbi->s_dirtyclusters_counter); | |
00d4e736 TT |
2836 | /* |
2837 | * Start pushing delalloc when 1/2 of free blocks are dirty. | |
2838 | */ | |
5c1ff336 | 2839 | if (dirty_clusters && (free_clusters < 2 * dirty_clusters)) |
10ee27a0 | 2840 | try_to_writeback_inodes_sb(sb, WB_REASON_FS_FREE_SPACE); |
00d4e736 | 2841 | |
5c1ff336 EW |
2842 | if (2 * free_clusters < 3 * dirty_clusters || |
2843 | free_clusters < (dirty_clusters + EXT4_FREECLUSTERS_WATERMARK)) { | |
79f0be8d | 2844 | /* |
c8afb446 ES |
2845 | * free block count is less than 150% of dirty blocks |
2846 | * or free blocks is less than watermark | |
79f0be8d AK |
2847 | */ |
2848 | return 1; | |
2849 | } | |
2850 | return 0; | |
2851 | } | |
2852 | ||
64769240 | 2853 | static int ext4_da_write_begin(struct file *file, struct address_space *mapping, |
9d6b0cd7 | 2854 | loff_t pos, unsigned len, |
de9a55b8 | 2855 | struct page **pagep, void **fsdata) |
64769240 | 2856 | { |
72b8ab9d | 2857 | int ret, retries = 0; |
0b5a2543 | 2858 | struct folio *folio; |
64769240 | 2859 | pgoff_t index; |
64769240 | 2860 | struct inode *inode = mapping->host; |
64769240 | 2861 | |
eb8ab444 | 2862 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
0db1ff22 TT |
2863 | return -EIO; |
2864 | ||
09cbfeaf | 2865 | index = pos >> PAGE_SHIFT; |
79f0be8d | 2866 | |
6493792d | 2867 | if (ext4_nonda_switch(inode->i_sb) || ext4_verity_in_progress(inode)) { |
79f0be8d AK |
2868 | *fsdata = (void *)FALL_BACK_TO_NONDELALLOC; |
2869 | return ext4_write_begin(file, mapping, pos, | |
9d6b0cd7 | 2870 | len, pagep, fsdata); |
79f0be8d AK |
2871 | } |
2872 | *fsdata = (void *)0; | |
9d6b0cd7 | 2873 | trace_ext4_da_write_begin(inode, pos, len); |
9c3569b5 TM |
2874 | |
2875 | if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) { | |
36d116e9 | 2876 | ret = ext4_da_write_inline_data_begin(mapping, inode, pos, len, |
9c3569b5 TM |
2877 | pagep, fsdata); |
2878 | if (ret < 0) | |
47564bfb TT |
2879 | return ret; |
2880 | if (ret == 1) | |
2881 | return 0; | |
9c3569b5 TM |
2882 | } |
2883 | ||
cc883236 | 2884 | retry: |
0b5a2543 MW |
2885 | folio = __filemap_get_folio(mapping, index, FGP_WRITEBEGIN, |
2886 | mapping_gfp_mask(mapping)); | |
7fa8a8ee LT |
2887 | if (IS_ERR(folio)) |
2888 | return PTR_ERR(folio); | |
47564bfb | 2889 | |
0b5a2543 MW |
2890 | /* In case writeback began while the folio was unlocked */ |
2891 | folio_wait_stable(folio); | |
64769240 | 2892 | |
643fa961 | 2893 | #ifdef CONFIG_FS_ENCRYPTION |
86b38c27 | 2894 | ret = ext4_block_write_begin(folio, pos, len, ext4_da_get_block_prep); |
2058f83a | 2895 | #else |
0b5a2543 | 2896 | ret = __block_write_begin(&folio->page, pos, len, ext4_da_get_block_prep); |
2058f83a | 2897 | #endif |
64769240 | 2898 | if (ret < 0) { |
0b5a2543 MW |
2899 | folio_unlock(folio); |
2900 | folio_put(folio); | |
ae4d5372 AK |
2901 | /* |
2902 | * block_write_begin may have instantiated a few blocks | |
2903 | * outside i_size. Trim these off again. Don't need | |
cc883236 | 2904 | * i_size_read because we hold inode lock. |
ae4d5372 AK |
2905 | */ |
2906 | if (pos + len > inode->i_size) | |
b9a4207d | 2907 | ext4_truncate_failed_write(inode); |
47564bfb TT |
2908 | |
2909 | if (ret == -ENOSPC && | |
2910 | ext4_should_retry_alloc(inode->i_sb, &retries)) | |
cc883236 | 2911 | goto retry; |
47564bfb | 2912 | return ret; |
64769240 AT |
2913 | } |
2914 | ||
0b5a2543 | 2915 | *pagep = &folio->page; |
64769240 AT |
2916 | return ret; |
2917 | } | |
2918 | ||
632eaeab MC |
2919 | /* |
2920 | * Check if we should update i_disksize | |
2921 | * when write to the end of file but not require block allocation | |
2922 | */ | |
d19500da | 2923 | static int ext4_da_should_update_i_disksize(struct folio *folio, |
de9a55b8 | 2924 | unsigned long offset) |
632eaeab MC |
2925 | { |
2926 | struct buffer_head *bh; | |
d19500da | 2927 | struct inode *inode = folio->mapping->host; |
632eaeab MC |
2928 | unsigned int idx; |
2929 | int i; | |
2930 | ||
d19500da | 2931 | bh = folio_buffers(folio); |
632eaeab MC |
2932 | idx = offset >> inode->i_blkbits; |
2933 | ||
af5bc92d | 2934 | for (i = 0; i < idx; i++) |
632eaeab MC |
2935 | bh = bh->b_this_page; |
2936 | ||
29fa89d0 | 2937 | if (!buffer_mapped(bh) || (buffer_delay(bh)) || buffer_unwritten(bh)) |
632eaeab MC |
2938 | return 0; |
2939 | return 1; | |
2940 | } | |
2941 | ||
03de20be LS |
2942 | static int ext4_da_do_write_end(struct address_space *mapping, |
2943 | loff_t pos, unsigned len, unsigned copied, | |
4d5cdd75 | 2944 | struct folio *folio) |
03de20be LS |
2945 | { |
2946 | struct inode *inode = mapping->host; | |
2947 | loff_t old_size = inode->i_size; | |
2948 | bool disksize_changed = false; | |
2949 | loff_t new_i_size; | |
2950 | ||
2951 | /* | |
2952 | * block_write_end() will mark the inode as dirty with I_DIRTY_PAGES | |
2953 | * flag, which all that's needed to trigger page writeback. | |
2954 | */ | |
4d5cdd75 MWO |
2955 | copied = block_write_end(NULL, mapping, pos, len, copied, |
2956 | &folio->page, NULL); | |
03de20be LS |
2957 | new_i_size = pos + copied; |
2958 | ||
2959 | /* | |
4d5cdd75 MWO |
2960 | * It's important to update i_size while still holding folio lock, |
2961 | * because folio writeout could otherwise come in and zero beyond | |
03de20be LS |
2962 | * i_size. |
2963 | * | |
2964 | * Since we are holding inode lock, we are sure i_disksize <= | |
2965 | * i_size. We also know that if i_disksize < i_size, there are | |
2966 | * delalloc writes pending in the range up to i_size. If the end of | |
2967 | * the current write is <= i_size, there's no need to touch | |
2968 | * i_disksize since writeback will push i_disksize up to i_size | |
2969 | * eventually. If the end of the current write is > i_size and | |
2970 | * inside an allocated block which ext4_da_should_update_i_disksize() | |
2971 | * checked, we need to update i_disksize here as certain | |
2972 | * ext4_writepages() paths not allocating blocks and update i_disksize. | |
2973 | */ | |
2974 | if (new_i_size > inode->i_size) { | |
2975 | unsigned long end; | |
2976 | ||
2977 | i_size_write(inode, new_i_size); | |
2978 | end = (new_i_size - 1) & (PAGE_SIZE - 1); | |
4d5cdd75 | 2979 | if (copied && ext4_da_should_update_i_disksize(folio, end)) { |
03de20be LS |
2980 | ext4_update_i_disksize(inode, new_i_size); |
2981 | disksize_changed = true; | |
2982 | } | |
2983 | } | |
2984 | ||
4d5cdd75 MWO |
2985 | folio_unlock(folio); |
2986 | folio_put(folio); | |
03de20be LS |
2987 | |
2988 | if (old_size < pos) | |
2989 | pagecache_isize_extended(inode, old_size, pos); | |
2990 | ||
2991 | if (disksize_changed) { | |
2992 | handle_t *handle; | |
2993 | ||
2994 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); | |
2995 | if (IS_ERR(handle)) | |
2996 | return PTR_ERR(handle); | |
2997 | ext4_mark_inode_dirty(handle, inode); | |
2998 | ext4_journal_stop(handle); | |
2999 | } | |
3000 | ||
3001 | return copied; | |
3002 | } | |
3003 | ||
64769240 | 3004 | static int ext4_da_write_end(struct file *file, |
de9a55b8 TT |
3005 | struct address_space *mapping, |
3006 | loff_t pos, unsigned len, unsigned copied, | |
3007 | struct page *page, void *fsdata) | |
64769240 AT |
3008 | { |
3009 | struct inode *inode = mapping->host; | |
79f0be8d | 3010 | int write_mode = (int)(unsigned long)fsdata; |
d19500da | 3011 | struct folio *folio = page_folio(page); |
79f0be8d | 3012 | |
74d553aa TT |
3013 | if (write_mode == FALL_BACK_TO_NONDELALLOC) |
3014 | return ext4_write_end(file, mapping, pos, | |
d19500da | 3015 | len, copied, &folio->page, fsdata); |
632eaeab | 3016 | |
9bffad1e | 3017 | trace_ext4_da_write_end(inode, pos, len, copied); |
6984aef5 ZY |
3018 | |
3019 | if (write_mode != CONVERT_INLINE_DATA && | |
3020 | ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA) && | |
3021 | ext4_has_inline_data(inode)) | |
d19500da RH |
3022 | return ext4_write_inline_data_end(inode, pos, len, copied, |
3023 | folio); | |
6984aef5 | 3024 | |
4d5cdd75 | 3025 | if (unlikely(copied < len) && !folio_test_uptodate(folio)) |
1dedde69 ZC |
3026 | copied = 0; |
3027 | ||
4d5cdd75 | 3028 | return ext4_da_do_write_end(mapping, pos, len, copied, folio); |
64769240 AT |
3029 | } |
3030 | ||
ccd2506b TT |
3031 | /* |
3032 | * Force all delayed allocation blocks to be allocated for a given inode. | |
3033 | */ | |
3034 | int ext4_alloc_da_blocks(struct inode *inode) | |
3035 | { | |
fb40ba0d TT |
3036 | trace_ext4_alloc_da_blocks(inode); |
3037 | ||
71d4f7d0 | 3038 | if (!EXT4_I(inode)->i_reserved_data_blocks) |
ccd2506b TT |
3039 | return 0; |
3040 | ||
3041 | /* | |
3042 | * We do something simple for now. The filemap_flush() will | |
3043 | * also start triggering a write of the data blocks, which is | |
3044 | * not strictly speaking necessary (and for users of | |
3045 | * laptop_mode, not even desirable). However, to do otherwise | |
3046 | * would require replicating code paths in: | |
de9a55b8 | 3047 | * |
20970ba6 | 3048 | * ext4_writepages() -> |
ccd2506b TT |
3049 | * write_cache_pages() ---> (via passed in callback function) |
3050 | * __mpage_da_writepage() --> | |
3051 | * mpage_add_bh_to_extent() | |
3052 | * mpage_da_map_blocks() | |
3053 | * | |
3054 | * The problem is that write_cache_pages(), located in | |
3055 | * mm/page-writeback.c, marks pages clean in preparation for | |
3056 | * doing I/O, which is not desirable if we're not planning on | |
3057 | * doing I/O at all. | |
3058 | * | |
3059 | * We could call write_cache_pages(), and then redirty all of | |
380cf090 | 3060 | * the pages by calling redirty_page_for_writepage() but that |
ccd2506b TT |
3061 | * would be ugly in the extreme. So instead we would need to |
3062 | * replicate parts of the code in the above functions, | |
25985edc | 3063 | * simplifying them because we wouldn't actually intend to |
ccd2506b TT |
3064 | * write out the pages, but rather only collect contiguous |
3065 | * logical block extents, call the multi-block allocator, and | |
3066 | * then update the buffer heads with the block allocations. | |
de9a55b8 | 3067 | * |
ccd2506b TT |
3068 | * For now, though, we'll cheat by calling filemap_flush(), |
3069 | * which will map the blocks, and start the I/O, but not | |
3070 | * actually wait for the I/O to complete. | |
3071 | */ | |
3072 | return filemap_flush(inode->i_mapping); | |
3073 | } | |
64769240 | 3074 | |
ac27a0ec DK |
3075 | /* |
3076 | * bmap() is special. It gets used by applications such as lilo and by | |
3077 | * the swapper to find the on-disk block of a specific piece of data. | |
3078 | * | |
3079 | * Naturally, this is dangerous if the block concerned is still in the | |
617ba13b | 3080 | * journal. If somebody makes a swapfile on an ext4 data-journaling |
ac27a0ec DK |
3081 | * filesystem and enables swap, then they may get a nasty shock when the |
3082 | * data getting swapped to that swapfile suddenly gets overwritten by | |
3083 | * the original zero's written out previously to the journal and | |
3084 | * awaiting writeback in the kernel's buffer cache. | |
3085 | * | |
3086 | * So, if we see any bmap calls here on a modified, data-journaled file, | |
3087 | * take extra steps to flush any blocks which might be in the cache. | |
3088 | */ | |
617ba13b | 3089 | static sector_t ext4_bmap(struct address_space *mapping, sector_t block) |
ac27a0ec DK |
3090 | { |
3091 | struct inode *inode = mapping->host; | |
51ae846c | 3092 | sector_t ret = 0; |
ac27a0ec | 3093 | |
51ae846c | 3094 | inode_lock_shared(inode); |
46c7f254 TM |
3095 | /* |
3096 | * We can get here for an inline file via the FIBMAP ioctl | |
3097 | */ | |
3098 | if (ext4_has_inline_data(inode)) | |
51ae846c | 3099 | goto out; |
46c7f254 | 3100 | |
64769240 | 3101 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) && |
951cafa6 JK |
3102 | (test_opt(inode->i_sb, DELALLOC) || |
3103 | ext4_should_journal_data(inode))) { | |
64769240 | 3104 | /* |
951cafa6 JK |
3105 | * With delalloc or journalled data we want to sync the file so |
3106 | * that we can make sure we allocate blocks for file and data | |
3107 | * is in place for the user to see it | |
64769240 AT |
3108 | */ |
3109 | filemap_write_and_wait(mapping); | |
3110 | } | |
3111 | ||
51ae846c YB |
3112 | ret = iomap_bmap(mapping, block, &ext4_iomap_ops); |
3113 | ||
3114 | out: | |
3115 | inode_unlock_shared(inode); | |
3116 | return ret; | |
ac27a0ec DK |
3117 | } |
3118 | ||
fe5ddf6b | 3119 | static int ext4_read_folio(struct file *file, struct folio *folio) |
ac27a0ec | 3120 | { |
46c7f254 | 3121 | int ret = -EAGAIN; |
c0be8e6f | 3122 | struct inode *inode = folio->mapping->host; |
46c7f254 | 3123 | |
36c9b450 | 3124 | trace_ext4_read_folio(inode, folio); |
46c7f254 TM |
3125 | |
3126 | if (ext4_has_inline_data(inode)) | |
3edde93e | 3127 | ret = ext4_readpage_inline(inode, folio); |
46c7f254 TM |
3128 | |
3129 | if (ret == -EAGAIN) | |
c0be8e6f | 3130 | return ext4_mpage_readpages(inode, NULL, folio); |
46c7f254 TM |
3131 | |
3132 | return ret; | |
ac27a0ec DK |
3133 | } |
3134 | ||
6311f91f | 3135 | static void ext4_readahead(struct readahead_control *rac) |
ac27a0ec | 3136 | { |
6311f91f | 3137 | struct inode *inode = rac->mapping->host; |
46c7f254 | 3138 | |
6311f91f | 3139 | /* If the file has inline data, no need to do readahead. */ |
46c7f254 | 3140 | if (ext4_has_inline_data(inode)) |
6311f91f | 3141 | return; |
46c7f254 | 3142 | |
a07f624b | 3143 | ext4_mpage_readpages(inode, rac, NULL); |
ac27a0ec DK |
3144 | } |
3145 | ||
7ba13abb MWO |
3146 | static void ext4_invalidate_folio(struct folio *folio, size_t offset, |
3147 | size_t length) | |
ac27a0ec | 3148 | { |
ccd16945 | 3149 | trace_ext4_invalidate_folio(folio, offset, length); |
0562e0ba | 3150 | |
4520fb3c | 3151 | /* No journalling happens on data buffers when this function is used */ |
7ba13abb | 3152 | WARN_ON(folio_buffers(folio) && buffer_jbd(folio_buffers(folio))); |
4520fb3c | 3153 | |
7ba13abb | 3154 | block_invalidate_folio(folio, offset, length); |
4520fb3c JK |
3155 | } |
3156 | ||
ccd16945 MWO |
3157 | static int __ext4_journalled_invalidate_folio(struct folio *folio, |
3158 | size_t offset, size_t length) | |
4520fb3c | 3159 | { |
ccd16945 | 3160 | journal_t *journal = EXT4_JOURNAL(folio->mapping->host); |
4520fb3c | 3161 | |
ccd16945 | 3162 | trace_ext4_journalled_invalidate_folio(folio, offset, length); |
4520fb3c | 3163 | |
ac27a0ec DK |
3164 | /* |
3165 | * If it's a full truncate we just forget about the pending dirtying | |
3166 | */ | |
ccd16945 MWO |
3167 | if (offset == 0 && length == folio_size(folio)) |
3168 | folio_clear_checked(folio); | |
ac27a0ec | 3169 | |
ccd16945 | 3170 | return jbd2_journal_invalidate_folio(journal, folio, offset, length); |
53e87268 JK |
3171 | } |
3172 | ||
3173 | /* Wrapper for aops... */ | |
ccd16945 MWO |
3174 | static void ext4_journalled_invalidate_folio(struct folio *folio, |
3175 | size_t offset, | |
3176 | size_t length) | |
53e87268 | 3177 | { |
ccd16945 | 3178 | WARN_ON(__ext4_journalled_invalidate_folio(folio, offset, length) < 0); |
ac27a0ec DK |
3179 | } |
3180 | ||
3c402f15 | 3181 | static bool ext4_release_folio(struct folio *folio, gfp_t wait) |
ac27a0ec | 3182 | { |
36c9b450 RH |
3183 | struct inode *inode = folio->mapping->host; |
3184 | journal_t *journal = EXT4_JOURNAL(inode); | |
ac27a0ec | 3185 | |
36c9b450 | 3186 | trace_ext4_release_folio(inode, folio); |
0562e0ba | 3187 | |
e1c36595 | 3188 | /* Page has dirty journalled data -> cannot release */ |
3c402f15 MWO |
3189 | if (folio_test_checked(folio)) |
3190 | return false; | |
0390131b | 3191 | if (journal) |
c56a6eb0 | 3192 | return jbd2_journal_try_to_free_buffers(journal, folio); |
0390131b | 3193 | else |
68189fef | 3194 | return try_to_free_buffers(folio); |
ac27a0ec DK |
3195 | } |
3196 | ||
b8a6176c JK |
3197 | static bool ext4_inode_datasync_dirty(struct inode *inode) |
3198 | { | |
3199 | journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; | |
3200 | ||
aa75f4d3 HS |
3201 | if (journal) { |
3202 | if (jbd2_transaction_committed(journal, | |
d0520df7 AR |
3203 | EXT4_I(inode)->i_datasync_tid)) |
3204 | return false; | |
3205 | if (test_opt2(inode->i_sb, JOURNAL_FAST_COMMIT)) | |
1ceecb53 | 3206 | return !list_empty(&EXT4_I(inode)->i_fc_list); |
d0520df7 | 3207 | return true; |
aa75f4d3 HS |
3208 | } |
3209 | ||
b8a6176c | 3210 | /* Any metadata buffers to write? */ |
600f111e | 3211 | if (!list_empty(&inode->i_mapping->i_private_list)) |
b8a6176c JK |
3212 | return true; |
3213 | return inode->i_state & I_DIRTY_DATASYNC; | |
3214 | } | |
3215 | ||
c8fdfe29 MB |
3216 | static void ext4_set_iomap(struct inode *inode, struct iomap *iomap, |
3217 | struct ext4_map_blocks *map, loff_t offset, | |
de205114 | 3218 | loff_t length, unsigned int flags) |
364443cb | 3219 | { |
c8fdfe29 | 3220 | u8 blkbits = inode->i_blkbits; |
364443cb | 3221 | |
c8fdfe29 MB |
3222 | /* |
3223 | * Writes that span EOF might trigger an I/O size update on completion, | |
3224 | * so consider them to be dirty for the purpose of O_DSYNC, even if | |
3225 | * there is no other metadata changes being made or are pending. | |
3226 | */ | |
364443cb | 3227 | iomap->flags = 0; |
c8fdfe29 MB |
3228 | if (ext4_inode_datasync_dirty(inode) || |
3229 | offset + length > i_size_read(inode)) | |
b8a6176c | 3230 | iomap->flags |= IOMAP_F_DIRTY; |
c8fdfe29 MB |
3231 | |
3232 | if (map->m_flags & EXT4_MAP_NEW) | |
3233 | iomap->flags |= IOMAP_F_NEW; | |
3234 | ||
de205114 CH |
3235 | if (flags & IOMAP_DAX) |
3236 | iomap->dax_dev = EXT4_SB(inode->i_sb)->s_daxdev; | |
3237 | else | |
3238 | iomap->bdev = inode->i_sb->s_bdev; | |
c8fdfe29 MB |
3239 | iomap->offset = (u64) map->m_lblk << blkbits; |
3240 | iomap->length = (u64) map->m_len << blkbits; | |
364443cb | 3241 | |
6386722a RH |
3242 | if ((map->m_flags & EXT4_MAP_MAPPED) && |
3243 | !ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) | |
3244 | iomap->flags |= IOMAP_F_MERGED; | |
3245 | ||
c8fdfe29 MB |
3246 | /* |
3247 | * Flags passed to ext4_map_blocks() for direct I/O writes can result | |
3248 | * in m_flags having both EXT4_MAP_MAPPED and EXT4_MAP_UNWRITTEN bits | |
3249 | * set. In order for any allocated unwritten extents to be converted | |
3250 | * into written extents correctly within the ->end_io() handler, we | |
3251 | * need to ensure that the iomap->type is set appropriately. Hence, the | |
3252 | * reason why we need to check whether the EXT4_MAP_UNWRITTEN bit has | |
3253 | * been set first. | |
3254 | */ | |
3255 | if (map->m_flags & EXT4_MAP_UNWRITTEN) { | |
3256 | iomap->type = IOMAP_UNWRITTEN; | |
3257 | iomap->addr = (u64) map->m_pblk << blkbits; | |
de205114 CH |
3258 | if (flags & IOMAP_DAX) |
3259 | iomap->addr += EXT4_SB(inode->i_sb)->s_dax_part_off; | |
c8fdfe29 MB |
3260 | } else if (map->m_flags & EXT4_MAP_MAPPED) { |
3261 | iomap->type = IOMAP_MAPPED; | |
3262 | iomap->addr = (u64) map->m_pblk << blkbits; | |
de205114 CH |
3263 | if (flags & IOMAP_DAX) |
3264 | iomap->addr += EXT4_SB(inode->i_sb)->s_dax_part_off; | |
ec9d669e ZY |
3265 | } else if (map->m_flags & EXT4_MAP_DELAYED) { |
3266 | iomap->type = IOMAP_DELALLOC; | |
3267 | iomap->addr = IOMAP_NULL_ADDR; | |
364443cb | 3268 | } else { |
c8fdfe29 MB |
3269 | iomap->type = IOMAP_HOLE; |
3270 | iomap->addr = IOMAP_NULL_ADDR; | |
364443cb | 3271 | } |
364443cb JK |
3272 | } |
3273 | ||
f063db5e MB |
3274 | static int ext4_iomap_alloc(struct inode *inode, struct ext4_map_blocks *map, |
3275 | unsigned int flags) | |
776722e8 | 3276 | { |
776722e8 | 3277 | handle_t *handle; |
378f32ba MB |
3278 | u8 blkbits = inode->i_blkbits; |
3279 | int ret, dio_credits, m_flags = 0, retries = 0; | |
776722e8 | 3280 | |
776722e8 | 3281 | /* |
f063db5e MB |
3282 | * Trim the mapping request to the maximum value that we can map at |
3283 | * once for direct I/O. | |
776722e8 | 3284 | */ |
f063db5e MB |
3285 | if (map->m_len > DIO_MAX_BLOCKS) |
3286 | map->m_len = DIO_MAX_BLOCKS; | |
3287 | dio_credits = ext4_chunk_trans_blocks(inode, map->m_len); | |
776722e8 | 3288 | |
f063db5e | 3289 | retry: |
776722e8 | 3290 | /* |
f063db5e MB |
3291 | * Either we allocate blocks and then don't get an unwritten extent, so |
3292 | * in that case we have reserved enough credits. Or, the blocks are | |
3293 | * already allocated and unwritten. In that case, the extent conversion | |
3294 | * fits into the credits as well. | |
776722e8 | 3295 | */ |
f063db5e MB |
3296 | handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS, dio_credits); |
3297 | if (IS_ERR(handle)) | |
3298 | return PTR_ERR(handle); | |
4c0425ff | 3299 | |
378f32ba MB |
3300 | /* |
3301 | * DAX and direct I/O are the only two operations that are currently | |
3302 | * supported with IOMAP_WRITE. | |
3303 | */ | |
952da063 CH |
3304 | WARN_ON(!(flags & (IOMAP_DAX | IOMAP_DIRECT))); |
3305 | if (flags & IOMAP_DAX) | |
378f32ba MB |
3306 | m_flags = EXT4_GET_BLOCKS_CREATE_ZERO; |
3307 | /* | |
3308 | * We use i_size instead of i_disksize here because delalloc writeback | |
3309 | * can complete at any point during the I/O and subsequently push the | |
3310 | * i_disksize out to i_size. This could be beyond where direct I/O is | |
3311 | * happening and thus expose allocated blocks to direct I/O reads. | |
3312 | */ | |
d0b040f5 | 3313 | else if (((loff_t)map->m_lblk << blkbits) >= i_size_read(inode)) |
378f32ba MB |
3314 | m_flags = EXT4_GET_BLOCKS_CREATE; |
3315 | else if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) | |
3316 | m_flags = EXT4_GET_BLOCKS_IO_CREATE_EXT; | |
4b70df18 | 3317 | |
378f32ba | 3318 | ret = ext4_map_blocks(handle, inode, map, m_flags); |
8d5d02e6 | 3319 | |
74c66bcb | 3320 | /* |
378f32ba MB |
3321 | * We cannot fill holes in indirect tree based inodes as that could |
3322 | * expose stale data in the case of a crash. Use the magic error code | |
3323 | * to fallback to buffered I/O. | |
74c66bcb | 3324 | */ |
378f32ba MB |
3325 | if (!m_flags && !ret) |
3326 | ret = -ENOTBLK; | |
187372a3 | 3327 | |
f063db5e MB |
3328 | ext4_journal_stop(handle); |
3329 | if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) | |
3330 | goto retry; | |
3331 | ||
3332 | return ret; | |
4c0425ff | 3333 | } |
c7064ef1 | 3334 | |
f063db5e | 3335 | |
364443cb | 3336 | static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length, |
c039b997 | 3337 | unsigned flags, struct iomap *iomap, struct iomap *srcmap) |
4c0425ff | 3338 | { |
364443cb | 3339 | int ret; |
09edf4d3 MB |
3340 | struct ext4_map_blocks map; |
3341 | u8 blkbits = inode->i_blkbits; | |
729f52c6 | 3342 | |
bcd8e91f TT |
3343 | if ((offset >> blkbits) > EXT4_MAX_LOGICAL_BLOCK) |
3344 | return -EINVAL; | |
4bd809db | 3345 | |
09edf4d3 MB |
3346 | if (WARN_ON_ONCE(ext4_has_inline_data(inode))) |
3347 | return -ERANGE; | |
4bd809db | 3348 | |
e8340395 | 3349 | /* |
09edf4d3 | 3350 | * Calculate the first and last logical blocks respectively. |
e8340395 | 3351 | */ |
09edf4d3 MB |
3352 | map.m_lblk = offset >> blkbits; |
3353 | map.m_len = min_t(loff_t, (offset + length - 1) >> blkbits, | |
3354 | EXT4_MAX_LOGICAL_BLOCK) - map.m_lblk + 1; | |
e8340395 | 3355 | |
9faac62d RH |
3356 | if (flags & IOMAP_WRITE) { |
3357 | /* | |
3358 | * We check here if the blocks are already allocated, then we | |
3359 | * don't need to start a journal txn and we can directly return | |
3360 | * the mapping information. This could boost performance | |
3361 | * especially in multi-threaded overwrite requests. | |
3362 | */ | |
3363 | if (offset + length <= i_size_read(inode)) { | |
3364 | ret = ext4_map_blocks(NULL, inode, &map, 0); | |
3365 | if (ret > 0 && (map.m_flags & EXT4_MAP_MAPPED)) | |
3366 | goto out; | |
3367 | } | |
f063db5e | 3368 | ret = ext4_iomap_alloc(inode, &map, flags); |
9faac62d | 3369 | } else { |
545052e9 | 3370 | ret = ext4_map_blocks(NULL, inode, &map, 0); |
9faac62d | 3371 | } |
4bd809db | 3372 | |
f063db5e MB |
3373 | if (ret < 0) |
3374 | return ret; | |
9faac62d | 3375 | out: |
38ea50da EB |
3376 | /* |
3377 | * When inline encryption is enabled, sometimes I/O to an encrypted file | |
3378 | * has to be broken up to guarantee DUN contiguity. Handle this by | |
3379 | * limiting the length of the mapping returned. | |
3380 | */ | |
3381 | map.m_len = fscrypt_limit_io_blocks(inode, map.m_lblk, map.m_len); | |
3382 | ||
de205114 | 3383 | ext4_set_iomap(inode, iomap, &map, offset, length, flags); |
4bd809db | 3384 | |
364443cb JK |
3385 | return 0; |
3386 | } | |
8d5d02e6 | 3387 | |
8cd115bd JK |
3388 | static int ext4_iomap_overwrite_begin(struct inode *inode, loff_t offset, |
3389 | loff_t length, unsigned flags, struct iomap *iomap, | |
3390 | struct iomap *srcmap) | |
3391 | { | |
3392 | int ret; | |
3393 | ||
3394 | /* | |
3395 | * Even for writes we don't need to allocate blocks, so just pretend | |
3396 | * we are reading to save overhead of starting a transaction. | |
3397 | */ | |
3398 | flags &= ~IOMAP_WRITE; | |
3399 | ret = ext4_iomap_begin(inode, offset, length, flags, iomap, srcmap); | |
fa83c34e | 3400 | WARN_ON_ONCE(!ret && iomap->type != IOMAP_MAPPED); |
8cd115bd JK |
3401 | return ret; |
3402 | } | |
3403 | ||
776722e8 JK |
3404 | static int ext4_iomap_end(struct inode *inode, loff_t offset, loff_t length, |
3405 | ssize_t written, unsigned flags, struct iomap *iomap) | |
3406 | { | |
69c499d1 | 3407 | /* |
378f32ba MB |
3408 | * Check to see whether an error occurred while writing out the data to |
3409 | * the allocated blocks. If so, return the magic error code so that we | |
3410 | * fallback to buffered I/O and attempt to complete the remainder of | |
3411 | * the I/O. Any blocks that may have been allocated in preparation for | |
3412 | * the direct I/O will be reused during buffered I/O. | |
69c499d1 | 3413 | */ |
378f32ba MB |
3414 | if (flags & (IOMAP_WRITE | IOMAP_DIRECT) && written == 0) |
3415 | return -ENOTBLK; | |
69c499d1 | 3416 | |
569342dc | 3417 | return 0; |
776722e8 | 3418 | } |
4bd809db | 3419 | |
8ff6daa1 | 3420 | const struct iomap_ops ext4_iomap_ops = { |
364443cb | 3421 | .iomap_begin = ext4_iomap_begin, |
776722e8 | 3422 | .iomap_end = ext4_iomap_end, |
364443cb | 3423 | }; |
8d5d02e6 | 3424 | |
8cd115bd JK |
3425 | const struct iomap_ops ext4_iomap_overwrite_ops = { |
3426 | .iomap_begin = ext4_iomap_overwrite_begin, | |
3427 | .iomap_end = ext4_iomap_end, | |
3428 | }; | |
3429 | ||
09edf4d3 MB |
3430 | static int ext4_iomap_begin_report(struct inode *inode, loff_t offset, |
3431 | loff_t length, unsigned int flags, | |
3432 | struct iomap *iomap, struct iomap *srcmap) | |
4c0425ff | 3433 | { |
09edf4d3 | 3434 | int ret; |
09edf4d3 MB |
3435 | struct ext4_map_blocks map; |
3436 | u8 blkbits = inode->i_blkbits; | |
4c0425ff | 3437 | |
09edf4d3 MB |
3438 | if ((offset >> blkbits) > EXT4_MAX_LOGICAL_BLOCK) |
3439 | return -EINVAL; | |
3440 | ||
3441 | if (ext4_has_inline_data(inode)) { | |
3442 | ret = ext4_inline_data_iomap(inode, iomap); | |
3443 | if (ret != -EAGAIN) { | |
3444 | if (ret == 0 && offset >= iomap->length) | |
3445 | ret = -ENOENT; | |
3446 | return ret; | |
3447 | } | |
3448 | } | |
2058f83a | 3449 | |
84ebd795 | 3450 | /* |
09edf4d3 | 3451 | * Calculate the first and last logical block respectively. |
84ebd795 | 3452 | */ |
09edf4d3 MB |
3453 | map.m_lblk = offset >> blkbits; |
3454 | map.m_len = min_t(loff_t, (offset + length - 1) >> blkbits, | |
3455 | EXT4_MAX_LOGICAL_BLOCK) - map.m_lblk + 1; | |
84ebd795 | 3456 | |
b2c57642 RH |
3457 | /* |
3458 | * Fiemap callers may call for offset beyond s_bitmap_maxbytes. | |
3459 | * So handle it here itself instead of querying ext4_map_blocks(). | |
3460 | * Since ext4_map_blocks() will warn about it and will return | |
3461 | * -EIO error. | |
3462 | */ | |
3463 | if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) { | |
3464 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
3465 | ||
3466 | if (offset >= sbi->s_bitmap_maxbytes) { | |
3467 | map.m_flags = 0; | |
3468 | goto set_iomap; | |
3469 | } | |
3470 | } | |
3471 | ||
09edf4d3 MB |
3472 | ret = ext4_map_blocks(NULL, inode, &map, 0); |
3473 | if (ret < 0) | |
3474 | return ret; | |
b2c57642 | 3475 | set_iomap: |
de205114 | 3476 | ext4_set_iomap(inode, iomap, &map, offset, length, flags); |
09edf4d3 MB |
3477 | |
3478 | return 0; | |
4c0425ff MC |
3479 | } |
3480 | ||
09edf4d3 MB |
3481 | const struct iomap_ops ext4_iomap_report_ops = { |
3482 | .iomap_begin = ext4_iomap_begin_report, | |
3483 | }; | |
3484 | ||
ac27a0ec | 3485 | /* |
3f5d3063 JK |
3486 | * For data=journal mode, folio should be marked dirty only when it was |
3487 | * writeably mapped. When that happens, it was already attached to the | |
3488 | * transaction and marked as jbddirty (we take care of this in | |
3489 | * ext4_page_mkwrite()). On transaction commit, we writeprotect page mappings | |
3490 | * so we should have nothing to do here, except for the case when someone | |
3491 | * had the page pinned and dirtied the page through this pin (e.g. by doing | |
3492 | * direct IO to it). In that case we'd need to attach buffers here to the | |
3493 | * transaction but we cannot due to lock ordering. We cannot just dirty the | |
3494 | * folio and leave attached buffers clean, because the buffers' dirty state is | |
3495 | * "definitive". We cannot just set the buffers dirty or jbddirty because all | |
3496 | * the journalling code will explode. So what we do is to mark the folio | |
3497 | * "pending dirty" and next time ext4_writepages() is called, attach buffers | |
3498 | * to the transaction appropriately. | |
ac27a0ec | 3499 | */ |
187c82cb MWO |
3500 | static bool ext4_journalled_dirty_folio(struct address_space *mapping, |
3501 | struct folio *folio) | |
ac27a0ec | 3502 | { |
0f252336 | 3503 | WARN_ON_ONCE(!folio_buffers(folio)); |
3f5d3063 JK |
3504 | if (folio_maybe_dma_pinned(folio)) |
3505 | folio_set_checked(folio); | |
187c82cb | 3506 | return filemap_dirty_folio(mapping, folio); |
ac27a0ec DK |
3507 | } |
3508 | ||
e621900a | 3509 | static bool ext4_dirty_folio(struct address_space *mapping, struct folio *folio) |
6dcc693b | 3510 | { |
e621900a MWO |
3511 | WARN_ON_ONCE(!folio_test_locked(folio) && !folio_test_dirty(folio)); |
3512 | WARN_ON_ONCE(!folio_buffers(folio)); | |
3513 | return block_dirty_folio(mapping, folio); | |
6dcc693b JK |
3514 | } |
3515 | ||
0e6895ba RH |
3516 | static int ext4_iomap_swap_activate(struct swap_info_struct *sis, |
3517 | struct file *file, sector_t *span) | |
3518 | { | |
3519 | return iomap_swapfile_activate(sis, file, span, | |
3520 | &ext4_iomap_report_ops); | |
3521 | } | |
3522 | ||
74d553aa | 3523 | static const struct address_space_operations ext4_aops = { |
fe5ddf6b | 3524 | .read_folio = ext4_read_folio, |
6311f91f | 3525 | .readahead = ext4_readahead, |
20970ba6 | 3526 | .writepages = ext4_writepages, |
8ab22b9a | 3527 | .write_begin = ext4_write_begin, |
74d553aa | 3528 | .write_end = ext4_write_end, |
e621900a | 3529 | .dirty_folio = ext4_dirty_folio, |
8ab22b9a | 3530 | .bmap = ext4_bmap, |
7ba13abb | 3531 | .invalidate_folio = ext4_invalidate_folio, |
3c402f15 | 3532 | .release_folio = ext4_release_folio, |
378f32ba | 3533 | .direct_IO = noop_direct_IO, |
67235182 | 3534 | .migrate_folio = buffer_migrate_folio, |
8ab22b9a | 3535 | .is_partially_uptodate = block_is_partially_uptodate, |
af7628d6 | 3536 | .error_remove_folio = generic_error_remove_folio, |
0e6895ba | 3537 | .swap_activate = ext4_iomap_swap_activate, |
ac27a0ec DK |
3538 | }; |
3539 | ||
617ba13b | 3540 | static const struct address_space_operations ext4_journalled_aops = { |
fe5ddf6b | 3541 | .read_folio = ext4_read_folio, |
6311f91f | 3542 | .readahead = ext4_readahead, |
20970ba6 | 3543 | .writepages = ext4_writepages, |
8ab22b9a HH |
3544 | .write_begin = ext4_write_begin, |
3545 | .write_end = ext4_journalled_write_end, | |
187c82cb | 3546 | .dirty_folio = ext4_journalled_dirty_folio, |
8ab22b9a | 3547 | .bmap = ext4_bmap, |
ccd16945 | 3548 | .invalidate_folio = ext4_journalled_invalidate_folio, |
3c402f15 | 3549 | .release_folio = ext4_release_folio, |
378f32ba | 3550 | .direct_IO = noop_direct_IO, |
dae99960 | 3551 | .migrate_folio = buffer_migrate_folio_norefs, |
8ab22b9a | 3552 | .is_partially_uptodate = block_is_partially_uptodate, |
af7628d6 | 3553 | .error_remove_folio = generic_error_remove_folio, |
0e6895ba | 3554 | .swap_activate = ext4_iomap_swap_activate, |
ac27a0ec DK |
3555 | }; |
3556 | ||
64769240 | 3557 | static const struct address_space_operations ext4_da_aops = { |
fe5ddf6b | 3558 | .read_folio = ext4_read_folio, |
6311f91f | 3559 | .readahead = ext4_readahead, |
20970ba6 | 3560 | .writepages = ext4_writepages, |
8ab22b9a HH |
3561 | .write_begin = ext4_da_write_begin, |
3562 | .write_end = ext4_da_write_end, | |
e621900a | 3563 | .dirty_folio = ext4_dirty_folio, |
8ab22b9a | 3564 | .bmap = ext4_bmap, |
7ba13abb | 3565 | .invalidate_folio = ext4_invalidate_folio, |
3c402f15 | 3566 | .release_folio = ext4_release_folio, |
378f32ba | 3567 | .direct_IO = noop_direct_IO, |
67235182 | 3568 | .migrate_folio = buffer_migrate_folio, |
8ab22b9a | 3569 | .is_partially_uptodate = block_is_partially_uptodate, |
af7628d6 | 3570 | .error_remove_folio = generic_error_remove_folio, |
0e6895ba | 3571 | .swap_activate = ext4_iomap_swap_activate, |
64769240 AT |
3572 | }; |
3573 | ||
5f0663bb DW |
3574 | static const struct address_space_operations ext4_dax_aops = { |
3575 | .writepages = ext4_dax_writepages, | |
3576 | .direct_IO = noop_direct_IO, | |
46de8b97 | 3577 | .dirty_folio = noop_dirty_folio, |
94dbb631 | 3578 | .bmap = ext4_bmap, |
0e6895ba | 3579 | .swap_activate = ext4_iomap_swap_activate, |
5f0663bb DW |
3580 | }; |
3581 | ||
617ba13b | 3582 | void ext4_set_aops(struct inode *inode) |
ac27a0ec | 3583 | { |
3d2b1582 LC |
3584 | switch (ext4_inode_journal_mode(inode)) { |
3585 | case EXT4_INODE_ORDERED_DATA_MODE: | |
3d2b1582 | 3586 | case EXT4_INODE_WRITEBACK_DATA_MODE: |
3d2b1582 LC |
3587 | break; |
3588 | case EXT4_INODE_JOURNAL_DATA_MODE: | |
617ba13b | 3589 | inode->i_mapping->a_ops = &ext4_journalled_aops; |
74d553aa | 3590 | return; |
3d2b1582 LC |
3591 | default: |
3592 | BUG(); | |
3593 | } | |
5f0663bb DW |
3594 | if (IS_DAX(inode)) |
3595 | inode->i_mapping->a_ops = &ext4_dax_aops; | |
3596 | else if (test_opt(inode->i_sb, DELALLOC)) | |
74d553aa TT |
3597 | inode->i_mapping->a_ops = &ext4_da_aops; |
3598 | else | |
3599 | inode->i_mapping->a_ops = &ext4_aops; | |
ac27a0ec DK |
3600 | } |
3601 | ||
c6bfd724 OM |
3602 | /* |
3603 | * Here we can't skip an unwritten buffer even though it usually reads zero | |
3604 | * because it might have data in pagecache (eg, if called from ext4_zero_range, | |
3605 | * ext4_punch_hole, etc) which needs to be properly zeroed out. Otherwise a | |
3606 | * racing writeback can come later and flush the stale pagecache to disk. | |
3607 | */ | |
923ae0ff | 3608 | static int __ext4_block_zero_page_range(handle_t *handle, |
d863dc36 LC |
3609 | struct address_space *mapping, loff_t from, loff_t length) |
3610 | { | |
09cbfeaf KS |
3611 | ext4_fsblk_t index = from >> PAGE_SHIFT; |
3612 | unsigned offset = from & (PAGE_SIZE-1); | |
923ae0ff | 3613 | unsigned blocksize, pos; |
d863dc36 LC |
3614 | ext4_lblk_t iblock; |
3615 | struct inode *inode = mapping->host; | |
3616 | struct buffer_head *bh; | |
9d3973de | 3617 | struct folio *folio; |
d863dc36 LC |
3618 | int err = 0; |
3619 | ||
9d3973de MW |
3620 | folio = __filemap_get_folio(mapping, from >> PAGE_SHIFT, |
3621 | FGP_LOCK | FGP_ACCESSED | FGP_CREAT, | |
3622 | mapping_gfp_constraint(mapping, ~__GFP_FS)); | |
7fa8a8ee LT |
3623 | if (IS_ERR(folio)) |
3624 | return PTR_ERR(folio); | |
d863dc36 LC |
3625 | |
3626 | blocksize = inode->i_sb->s_blocksize; | |
d863dc36 | 3627 | |
09cbfeaf | 3628 | iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits); |
d863dc36 | 3629 | |
9d3973de | 3630 | bh = folio_buffers(folio); |
d4059993 | 3631 | if (!bh) |
0a88810d | 3632 | bh = create_empty_buffers(folio, blocksize, 0); |
d863dc36 LC |
3633 | |
3634 | /* Find the buffer that contains "offset" */ | |
d863dc36 LC |
3635 | pos = blocksize; |
3636 | while (offset >= pos) { | |
3637 | bh = bh->b_this_page; | |
3638 | iblock++; | |
3639 | pos += blocksize; | |
3640 | } | |
d863dc36 LC |
3641 | if (buffer_freed(bh)) { |
3642 | BUFFER_TRACE(bh, "freed: skip"); | |
3643 | goto unlock; | |
3644 | } | |
d863dc36 LC |
3645 | if (!buffer_mapped(bh)) { |
3646 | BUFFER_TRACE(bh, "unmapped"); | |
3647 | ext4_get_block(inode, iblock, bh, 0); | |
3648 | /* unmapped? It's a hole - nothing to do */ | |
3649 | if (!buffer_mapped(bh)) { | |
3650 | BUFFER_TRACE(bh, "still unmapped"); | |
3651 | goto unlock; | |
3652 | } | |
3653 | } | |
3654 | ||
3655 | /* Ok, it's mapped. Make sure it's up-to-date */ | |
9d3973de | 3656 | if (folio_test_uptodate(folio)) |
d863dc36 LC |
3657 | set_buffer_uptodate(bh); |
3658 | ||
3659 | if (!buffer_uptodate(bh)) { | |
2d069c08 | 3660 | err = ext4_read_bh_lock(bh, 0, true); |
3661 | if (err) | |
d863dc36 | 3662 | goto unlock; |
4f74d15f | 3663 | if (fscrypt_inode_uses_fs_layer_crypto(inode)) { |
c9c7429c | 3664 | /* We expect the key to be set. */ |
a7550b30 | 3665 | BUG_ON(!fscrypt_has_encryption_key(inode)); |
9d3973de | 3666 | err = fscrypt_decrypt_pagecache_blocks(folio, |
51e4e315 | 3667 | blocksize, |
834f1565 EB |
3668 | bh_offset(bh)); |
3669 | if (err) { | |
3670 | clear_buffer_uptodate(bh); | |
3671 | goto unlock; | |
3672 | } | |
c9c7429c | 3673 | } |
d863dc36 | 3674 | } |
d863dc36 LC |
3675 | if (ext4_should_journal_data(inode)) { |
3676 | BUFFER_TRACE(bh, "get write access"); | |
188c299e JK |
3677 | err = ext4_journal_get_write_access(handle, inode->i_sb, bh, |
3678 | EXT4_JTR_NONE); | |
d863dc36 LC |
3679 | if (err) |
3680 | goto unlock; | |
3681 | } | |
9d3973de | 3682 | folio_zero_range(folio, offset, length); |
d863dc36 LC |
3683 | BUFFER_TRACE(bh, "zeroed end of block"); |
3684 | ||
d863dc36 | 3685 | if (ext4_should_journal_data(inode)) { |
d84c9ebd | 3686 | err = ext4_dirty_journalled_data(handle, bh); |
0713ed0c | 3687 | } else { |
353eefd3 | 3688 | err = 0; |
d863dc36 | 3689 | mark_buffer_dirty(bh); |
3957ef53 | 3690 | if (ext4_should_order_data(inode)) |
73131fbb RZ |
3691 | err = ext4_jbd2_inode_add_write(handle, inode, from, |
3692 | length); | |
0713ed0c | 3693 | } |
d863dc36 LC |
3694 | |
3695 | unlock: | |
9d3973de MW |
3696 | folio_unlock(folio); |
3697 | folio_put(folio); | |
d863dc36 LC |
3698 | return err; |
3699 | } | |
3700 | ||
923ae0ff RZ |
3701 | /* |
3702 | * ext4_block_zero_page_range() zeros out a mapping of length 'length' | |
3703 | * starting from file offset 'from'. The range to be zero'd must | |
3704 | * be contained with in one block. If the specified range exceeds | |
3705 | * the end of the block it will be shortened to end of the block | |
3088e5a5 | 3706 | * that corresponds to 'from' |
923ae0ff RZ |
3707 | */ |
3708 | static int ext4_block_zero_page_range(handle_t *handle, | |
3709 | struct address_space *mapping, loff_t from, loff_t length) | |
3710 | { | |
3711 | struct inode *inode = mapping->host; | |
09cbfeaf | 3712 | unsigned offset = from & (PAGE_SIZE-1); |
923ae0ff RZ |
3713 | unsigned blocksize = inode->i_sb->s_blocksize; |
3714 | unsigned max = blocksize - (offset & (blocksize - 1)); | |
3715 | ||
3716 | /* | |
3717 | * correct length if it does not fall between | |
3718 | * 'from' and the end of the block | |
3719 | */ | |
3720 | if (length > max || length < 0) | |
3721 | length = max; | |
3722 | ||
47e69351 | 3723 | if (IS_DAX(inode)) { |
c6f40468 CH |
3724 | return dax_zero_range(inode, from, length, NULL, |
3725 | &ext4_iomap_ops); | |
47e69351 | 3726 | } |
923ae0ff RZ |
3727 | return __ext4_block_zero_page_range(handle, mapping, from, length); |
3728 | } | |
3729 | ||
94350ab5 MW |
3730 | /* |
3731 | * ext4_block_truncate_page() zeroes out a mapping from file offset `from' | |
3732 | * up to the end of the block which corresponds to `from'. | |
3733 | * This required during truncate. We need to physically zero the tail end | |
3734 | * of that block so it doesn't yield old data if the file is later grown. | |
3735 | */ | |
c197855e | 3736 | static int ext4_block_truncate_page(handle_t *handle, |
94350ab5 MW |
3737 | struct address_space *mapping, loff_t from) |
3738 | { | |
09cbfeaf | 3739 | unsigned offset = from & (PAGE_SIZE-1); |
94350ab5 MW |
3740 | unsigned length; |
3741 | unsigned blocksize; | |
3742 | struct inode *inode = mapping->host; | |
3743 | ||
0d06863f | 3744 | /* If we are processing an encrypted inode during orphan list handling */ |
592ddec7 | 3745 | if (IS_ENCRYPTED(inode) && !fscrypt_has_encryption_key(inode)) |
0d06863f TT |
3746 | return 0; |
3747 | ||
94350ab5 MW |
3748 | blocksize = inode->i_sb->s_blocksize; |
3749 | length = blocksize - (offset & (blocksize - 1)); | |
3750 | ||
3751 | return ext4_block_zero_page_range(handle, mapping, from, length); | |
3752 | } | |
3753 | ||
a87dd18c LC |
3754 | int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, |
3755 | loff_t lstart, loff_t length) | |
3756 | { | |
3757 | struct super_block *sb = inode->i_sb; | |
3758 | struct address_space *mapping = inode->i_mapping; | |
e1be3a92 | 3759 | unsigned partial_start, partial_end; |
a87dd18c LC |
3760 | ext4_fsblk_t start, end; |
3761 | loff_t byte_end = (lstart + length - 1); | |
3762 | int err = 0; | |
3763 | ||
e1be3a92 LC |
3764 | partial_start = lstart & (sb->s_blocksize - 1); |
3765 | partial_end = byte_end & (sb->s_blocksize - 1); | |
3766 | ||
a87dd18c LC |
3767 | start = lstart >> sb->s_blocksize_bits; |
3768 | end = byte_end >> sb->s_blocksize_bits; | |
3769 | ||
3770 | /* Handle partial zero within the single block */ | |
e1be3a92 LC |
3771 | if (start == end && |
3772 | (partial_start || (partial_end != sb->s_blocksize - 1))) { | |
a87dd18c LC |
3773 | err = ext4_block_zero_page_range(handle, mapping, |
3774 | lstart, length); | |
3775 | return err; | |
3776 | } | |
3777 | /* Handle partial zero out on the start of the range */ | |
e1be3a92 | 3778 | if (partial_start) { |
a87dd18c LC |
3779 | err = ext4_block_zero_page_range(handle, mapping, |
3780 | lstart, sb->s_blocksize); | |
3781 | if (err) | |
3782 | return err; | |
3783 | } | |
3784 | /* Handle partial zero out on the end of the range */ | |
e1be3a92 | 3785 | if (partial_end != sb->s_blocksize - 1) |
a87dd18c | 3786 | err = ext4_block_zero_page_range(handle, mapping, |
e1be3a92 LC |
3787 | byte_end - partial_end, |
3788 | partial_end + 1); | |
a87dd18c LC |
3789 | return err; |
3790 | } | |
3791 | ||
91ef4caf DG |
3792 | int ext4_can_truncate(struct inode *inode) |
3793 | { | |
91ef4caf DG |
3794 | if (S_ISREG(inode->i_mode)) |
3795 | return 1; | |
3796 | if (S_ISDIR(inode->i_mode)) | |
3797 | return 1; | |
3798 | if (S_ISLNK(inode->i_mode)) | |
3799 | return !ext4_inode_is_fast_symlink(inode); | |
3800 | return 0; | |
3801 | } | |
3802 | ||
01127848 JK |
3803 | /* |
3804 | * We have to make sure i_disksize gets properly updated before we truncate | |
3805 | * page cache due to hole punching or zero range. Otherwise i_disksize update | |
3806 | * can get lost as it may have been postponed to submission of writeback but | |
3807 | * that will never happen after we truncate page cache. | |
3808 | */ | |
3809 | int ext4_update_disksize_before_punch(struct inode *inode, loff_t offset, | |
3810 | loff_t len) | |
3811 | { | |
3812 | handle_t *handle; | |
4209ae12 HS |
3813 | int ret; |
3814 | ||
01127848 JK |
3815 | loff_t size = i_size_read(inode); |
3816 | ||
5955102c | 3817 | WARN_ON(!inode_is_locked(inode)); |
01127848 JK |
3818 | if (offset > size || offset + len < size) |
3819 | return 0; | |
3820 | ||
3821 | if (EXT4_I(inode)->i_disksize >= size) | |
3822 | return 0; | |
3823 | ||
3824 | handle = ext4_journal_start(inode, EXT4_HT_MISC, 1); | |
3825 | if (IS_ERR(handle)) | |
3826 | return PTR_ERR(handle); | |
3827 | ext4_update_i_disksize(inode, size); | |
4209ae12 | 3828 | ret = ext4_mark_inode_dirty(handle, inode); |
01127848 JK |
3829 | ext4_journal_stop(handle); |
3830 | ||
4209ae12 | 3831 | return ret; |
01127848 JK |
3832 | } |
3833 | ||
d4f5258e | 3834 | static void ext4_wait_dax_page(struct inode *inode) |
430657b6 | 3835 | { |
d4f5258e | 3836 | filemap_invalidate_unlock(inode->i_mapping); |
430657b6 | 3837 | schedule(); |
d4f5258e | 3838 | filemap_invalidate_lock(inode->i_mapping); |
430657b6 RZ |
3839 | } |
3840 | ||
3841 | int ext4_break_layouts(struct inode *inode) | |
3842 | { | |
430657b6 | 3843 | struct page *page; |
430657b6 RZ |
3844 | int error; |
3845 | ||
d4f5258e | 3846 | if (WARN_ON_ONCE(!rwsem_is_locked(&inode->i_mapping->invalidate_lock))) |
430657b6 RZ |
3847 | return -EINVAL; |
3848 | ||
3849 | do { | |
430657b6 RZ |
3850 | page = dax_layout_busy_page(inode->i_mapping); |
3851 | if (!page) | |
3852 | return 0; | |
3853 | ||
3854 | error = ___wait_var_event(&page->_refcount, | |
3855 | atomic_read(&page->_refcount) == 1, | |
3856 | TASK_INTERRUPTIBLE, 0, 0, | |
d4f5258e | 3857 | ext4_wait_dax_page(inode)); |
b1f38217 | 3858 | } while (error == 0); |
430657b6 RZ |
3859 | |
3860 | return error; | |
3861 | } | |
3862 | ||
a4bb6b64 | 3863 | /* |
cca32b7e | 3864 | * ext4_punch_hole: punches a hole in a file by releasing the blocks |
a4bb6b64 AH |
3865 | * associated with the given offset and length |
3866 | * | |
3867 | * @inode: File inode | |
3868 | * @offset: The offset where the hole will begin | |
3869 | * @len: The length of the hole | |
3870 | * | |
4907cb7b | 3871 | * Returns: 0 on success or negative on failure |
a4bb6b64 AH |
3872 | */ |
3873 | ||
ad5cd4f4 | 3874 | int ext4_punch_hole(struct file *file, loff_t offset, loff_t length) |
a4bb6b64 | 3875 | { |
ad5cd4f4 | 3876 | struct inode *inode = file_inode(file); |
26a4c0c6 TT |
3877 | struct super_block *sb = inode->i_sb; |
3878 | ext4_lblk_t first_block, stop_block; | |
3879 | struct address_space *mapping = inode->i_mapping; | |
2da37622 TS |
3880 | loff_t first_block_offset, last_block_offset, max_length; |
3881 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); | |
26a4c0c6 TT |
3882 | handle_t *handle; |
3883 | unsigned int credits; | |
4209ae12 | 3884 | int ret = 0, ret2 = 0; |
26a4c0c6 | 3885 | |
b8a86845 | 3886 | trace_ext4_punch_hole(inode, offset, length, 0); |
aaddea81 | 3887 | |
26a4c0c6 TT |
3888 | /* |
3889 | * Write out all dirty pages to avoid race conditions | |
3890 | * Then release them. | |
3891 | */ | |
cca32b7e | 3892 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) { |
26a4c0c6 TT |
3893 | ret = filemap_write_and_wait_range(mapping, offset, |
3894 | offset + length - 1); | |
3895 | if (ret) | |
3896 | return ret; | |
3897 | } | |
3898 | ||
5955102c | 3899 | inode_lock(inode); |
9ef06cec | 3900 | |
26a4c0c6 TT |
3901 | /* No need to punch hole beyond i_size */ |
3902 | if (offset >= inode->i_size) | |
3903 | goto out_mutex; | |
3904 | ||
3905 | /* | |
3906 | * If the hole extends beyond i_size, set the hole | |
3907 | * to end after the page that contains i_size | |
3908 | */ | |
3909 | if (offset + length > inode->i_size) { | |
3910 | length = inode->i_size + | |
09cbfeaf | 3911 | PAGE_SIZE - (inode->i_size & (PAGE_SIZE - 1)) - |
26a4c0c6 TT |
3912 | offset; |
3913 | } | |
3914 | ||
2da37622 TS |
3915 | /* |
3916 | * For punch hole the length + offset needs to be within one block | |
3917 | * before last range. Adjust the length if it goes beyond that limit. | |
3918 | */ | |
3919 | max_length = sbi->s_bitmap_maxbytes - inode->i_sb->s_blocksize; | |
3920 | if (offset + length > max_length) | |
3921 | length = max_length - offset; | |
3922 | ||
a361293f JK |
3923 | if (offset & (sb->s_blocksize - 1) || |
3924 | (offset + length) & (sb->s_blocksize - 1)) { | |
3925 | /* | |
3926 | * Attach jinode to inode for jbd2 if we do any zeroing of | |
3927 | * partial block | |
3928 | */ | |
3929 | ret = ext4_inode_attach_jinode(inode); | |
3930 | if (ret < 0) | |
3931 | goto out_mutex; | |
3932 | ||
3933 | } | |
3934 | ||
f340b3d9 | 3935 | /* Wait all existing dio workers, newcomers will block on i_rwsem */ |
ea3d7209 JK |
3936 | inode_dio_wait(inode); |
3937 | ||
ad5cd4f4 DW |
3938 | ret = file_modified(file); |
3939 | if (ret) | |
3940 | goto out_mutex; | |
3941 | ||
ea3d7209 JK |
3942 | /* |
3943 | * Prevent page faults from reinstantiating pages we have released from | |
3944 | * page cache. | |
3945 | */ | |
d4f5258e | 3946 | filemap_invalidate_lock(mapping); |
430657b6 RZ |
3947 | |
3948 | ret = ext4_break_layouts(inode); | |
3949 | if (ret) | |
3950 | goto out_dio; | |
3951 | ||
a87dd18c LC |
3952 | first_block_offset = round_up(offset, sb->s_blocksize); |
3953 | last_block_offset = round_down((offset + length), sb->s_blocksize) - 1; | |
26a4c0c6 | 3954 | |
a87dd18c | 3955 | /* Now release the pages and zero block aligned part of pages*/ |
01127848 JK |
3956 | if (last_block_offset > first_block_offset) { |
3957 | ret = ext4_update_disksize_before_punch(inode, offset, length); | |
3958 | if (ret) | |
3959 | goto out_dio; | |
a87dd18c LC |
3960 | truncate_pagecache_range(inode, first_block_offset, |
3961 | last_block_offset); | |
01127848 | 3962 | } |
26a4c0c6 TT |
3963 | |
3964 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) | |
3965 | credits = ext4_writepage_trans_blocks(inode); | |
3966 | else | |
3967 | credits = ext4_blocks_for_truncate(inode); | |
3968 | handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits); | |
3969 | if (IS_ERR(handle)) { | |
3970 | ret = PTR_ERR(handle); | |
3971 | ext4_std_error(sb, ret); | |
3972 | goto out_dio; | |
3973 | } | |
3974 | ||
a87dd18c LC |
3975 | ret = ext4_zero_partial_blocks(handle, inode, offset, |
3976 | length); | |
3977 | if (ret) | |
3978 | goto out_stop; | |
26a4c0c6 TT |
3979 | |
3980 | first_block = (offset + sb->s_blocksize - 1) >> | |
3981 | EXT4_BLOCK_SIZE_BITS(sb); | |
3982 | stop_block = (offset + length) >> EXT4_BLOCK_SIZE_BITS(sb); | |
3983 | ||
eee597ac LC |
3984 | /* If there are blocks to remove, do it */ |
3985 | if (stop_block > first_block) { | |
9f111822 | 3986 | ext4_lblk_t hole_len = stop_block - first_block; |
26a4c0c6 | 3987 | |
eee597ac | 3988 | down_write(&EXT4_I(inode)->i_data_sem); |
2ffd2a6a | 3989 | ext4_discard_preallocations(inode); |
26a4c0c6 | 3990 | |
9f111822 | 3991 | ext4_es_remove_extent(inode, first_block, hole_len); |
26a4c0c6 | 3992 | |
eee597ac LC |
3993 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) |
3994 | ret = ext4_ext_remove_space(inode, first_block, | |
3995 | stop_block - 1); | |
3996 | else | |
3997 | ret = ext4_ind_remove_space(handle, inode, first_block, | |
3998 | stop_block); | |
26a4c0c6 | 3999 | |
9f111822 ZY |
4000 | ext4_es_insert_extent(inode, first_block, hole_len, ~0, |
4001 | EXTENT_STATUS_HOLE); | |
eee597ac LC |
4002 | up_write(&EXT4_I(inode)->i_data_sem); |
4003 | } | |
a80f7fcf | 4004 | ext4_fc_track_range(handle, inode, first_block, stop_block); |
26a4c0c6 TT |
4005 | if (IS_SYNC(inode)) |
4006 | ext4_handle_sync(handle); | |
e251f9bc | 4007 | |
b898ab23 | 4008 | inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
4209ae12 HS |
4009 | ret2 = ext4_mark_inode_dirty(handle, inode); |
4010 | if (unlikely(ret2)) | |
4011 | ret = ret2; | |
67a7d5f5 JK |
4012 | if (ret >= 0) |
4013 | ext4_update_inode_fsync_trans(handle, inode, 1); | |
26a4c0c6 TT |
4014 | out_stop: |
4015 | ext4_journal_stop(handle); | |
4016 | out_dio: | |
d4f5258e | 4017 | filemap_invalidate_unlock(mapping); |
26a4c0c6 | 4018 | out_mutex: |
5955102c | 4019 | inode_unlock(inode); |
26a4c0c6 | 4020 | return ret; |
a4bb6b64 AH |
4021 | } |
4022 | ||
a361293f JK |
4023 | int ext4_inode_attach_jinode(struct inode *inode) |
4024 | { | |
4025 | struct ext4_inode_info *ei = EXT4_I(inode); | |
4026 | struct jbd2_inode *jinode; | |
4027 | ||
4028 | if (ei->jinode || !EXT4_SB(inode->i_sb)->s_journal) | |
4029 | return 0; | |
4030 | ||
4031 | jinode = jbd2_alloc_inode(GFP_KERNEL); | |
4032 | spin_lock(&inode->i_lock); | |
4033 | if (!ei->jinode) { | |
4034 | if (!jinode) { | |
4035 | spin_unlock(&inode->i_lock); | |
4036 | return -ENOMEM; | |
4037 | } | |
4038 | ei->jinode = jinode; | |
4039 | jbd2_journal_init_jbd_inode(ei->jinode, inode); | |
4040 | jinode = NULL; | |
4041 | } | |
4042 | spin_unlock(&inode->i_lock); | |
4043 | if (unlikely(jinode != NULL)) | |
4044 | jbd2_free_inode(jinode); | |
4045 | return 0; | |
4046 | } | |
4047 | ||
ac27a0ec | 4048 | /* |
617ba13b | 4049 | * ext4_truncate() |
ac27a0ec | 4050 | * |
617ba13b MC |
4051 | * We block out ext4_get_block() block instantiations across the entire |
4052 | * transaction, and VFS/VM ensures that ext4_truncate() cannot run | |
ac27a0ec DK |
4053 | * simultaneously on behalf of the same inode. |
4054 | * | |
42b2aa86 | 4055 | * As we work through the truncate and commit bits of it to the journal there |
ac27a0ec DK |
4056 | * is one core, guiding principle: the file's tree must always be consistent on |
4057 | * disk. We must be able to restart the truncate after a crash. | |
4058 | * | |
4059 | * The file's tree may be transiently inconsistent in memory (although it | |
4060 | * probably isn't), but whenever we close off and commit a journal transaction, | |
4061 | * the contents of (the filesystem + the journal) must be consistent and | |
4062 | * restartable. It's pretty simple, really: bottom up, right to left (although | |
4063 | * left-to-right works OK too). | |
4064 | * | |
4065 | * Note that at recovery time, journal replay occurs *before* the restart of | |
4066 | * truncate against the orphan inode list. | |
4067 | * | |
4068 | * The committed inode has the new, desired i_size (which is the same as | |
617ba13b | 4069 | * i_disksize in this case). After a crash, ext4_orphan_cleanup() will see |
ac27a0ec | 4070 | * that this inode's truncate did not complete and it will again call |
617ba13b MC |
4071 | * ext4_truncate() to have another go. So there will be instantiated blocks |
4072 | * to the right of the truncation point in a crashed ext4 filesystem. But | |
ac27a0ec | 4073 | * that's fine - as long as they are linked from the inode, the post-crash |
617ba13b | 4074 | * ext4_truncate() run will find them and release them. |
ac27a0ec | 4075 | */ |
2c98eb5e | 4076 | int ext4_truncate(struct inode *inode) |
ac27a0ec | 4077 | { |
819c4920 TT |
4078 | struct ext4_inode_info *ei = EXT4_I(inode); |
4079 | unsigned int credits; | |
4209ae12 | 4080 | int err = 0, err2; |
819c4920 TT |
4081 | handle_t *handle; |
4082 | struct address_space *mapping = inode->i_mapping; | |
819c4920 | 4083 | |
19b5ef61 TT |
4084 | /* |
4085 | * There is a possibility that we're either freeing the inode | |
e04027e8 | 4086 | * or it's a completely new inode. In those cases we might not |
f340b3d9 | 4087 | * have i_rwsem locked because it's not necessary. |
19b5ef61 TT |
4088 | */ |
4089 | if (!(inode->i_state & (I_NEW|I_FREEING))) | |
5955102c | 4090 | WARN_ON(!inode_is_locked(inode)); |
0562e0ba JZ |
4091 | trace_ext4_truncate_enter(inode); |
4092 | ||
91ef4caf | 4093 | if (!ext4_can_truncate(inode)) |
9a5d265f | 4094 | goto out_trace; |
ac27a0ec | 4095 | |
5534fb5b | 4096 | if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC)) |
19f5fb7a | 4097 | ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE); |
7d8f9f7d | 4098 | |
aef1c851 TM |
4099 | if (ext4_has_inline_data(inode)) { |
4100 | int has_inline = 1; | |
4101 | ||
01daf945 | 4102 | err = ext4_inline_data_truncate(inode, &has_inline); |
9a5d265f | 4103 | if (err || has_inline) |
4104 | goto out_trace; | |
aef1c851 TM |
4105 | } |
4106 | ||
a361293f JK |
4107 | /* If we zero-out tail of the page, we have to create jinode for jbd2 */ |
4108 | if (inode->i_size & (inode->i_sb->s_blocksize - 1)) { | |
a71248b1 BL |
4109 | err = ext4_inode_attach_jinode(inode); |
4110 | if (err) | |
9a5d265f | 4111 | goto out_trace; |
a361293f JK |
4112 | } |
4113 | ||
819c4920 TT |
4114 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) |
4115 | credits = ext4_writepage_trans_blocks(inode); | |
4116 | else | |
4117 | credits = ext4_blocks_for_truncate(inode); | |
4118 | ||
4119 | handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits); | |
9a5d265f | 4120 | if (IS_ERR(handle)) { |
4121 | err = PTR_ERR(handle); | |
4122 | goto out_trace; | |
4123 | } | |
819c4920 | 4124 | |
eb3544c6 LC |
4125 | if (inode->i_size & (inode->i_sb->s_blocksize - 1)) |
4126 | ext4_block_truncate_page(handle, mapping, inode->i_size); | |
819c4920 TT |
4127 | |
4128 | /* | |
4129 | * We add the inode to the orphan list, so that if this | |
4130 | * truncate spans multiple transactions, and we crash, we will | |
4131 | * resume the truncate when the filesystem recovers. It also | |
4132 | * marks the inode dirty, to catch the new size. | |
4133 | * | |
4134 | * Implication: the file must always be in a sane, consistent | |
4135 | * truncatable state while each transaction commits. | |
4136 | */ | |
2c98eb5e TT |
4137 | err = ext4_orphan_add(handle, inode); |
4138 | if (err) | |
819c4920 TT |
4139 | goto out_stop; |
4140 | ||
4141 | down_write(&EXT4_I(inode)->i_data_sem); | |
4142 | ||
2ffd2a6a | 4143 | ext4_discard_preallocations(inode); |
819c4920 | 4144 | |
ff9893dc | 4145 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) |
d0abb36d | 4146 | err = ext4_ext_truncate(handle, inode); |
ff9893dc | 4147 | else |
819c4920 TT |
4148 | ext4_ind_truncate(handle, inode); |
4149 | ||
4150 | up_write(&ei->i_data_sem); | |
d0abb36d TT |
4151 | if (err) |
4152 | goto out_stop; | |
819c4920 TT |
4153 | |
4154 | if (IS_SYNC(inode)) | |
4155 | ext4_handle_sync(handle); | |
4156 | ||
4157 | out_stop: | |
4158 | /* | |
4159 | * If this was a simple ftruncate() and the file will remain alive, | |
4160 | * then we need to clear up the orphan record which we created above. | |
4161 | * However, if this was a real unlink then we were called by | |
58d86a50 | 4162 | * ext4_evict_inode(), and we allow that function to clean up the |
819c4920 TT |
4163 | * orphan info for us. |
4164 | */ | |
4165 | if (inode->i_nlink) | |
4166 | ext4_orphan_del(handle, inode); | |
4167 | ||
b898ab23 | 4168 | inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
4209ae12 HS |
4169 | err2 = ext4_mark_inode_dirty(handle, inode); |
4170 | if (unlikely(err2 && !err)) | |
4171 | err = err2; | |
819c4920 | 4172 | ext4_journal_stop(handle); |
ac27a0ec | 4173 | |
9a5d265f | 4174 | out_trace: |
0562e0ba | 4175 | trace_ext4_truncate_exit(inode); |
2c98eb5e | 4176 | return err; |
ac27a0ec DK |
4177 | } |
4178 | ||
9a1bf32c ZY |
4179 | static inline u64 ext4_inode_peek_iversion(const struct inode *inode) |
4180 | { | |
4181 | if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) | |
4182 | return inode_peek_iversion_raw(inode); | |
4183 | else | |
4184 | return inode_peek_iversion(inode); | |
4185 | } | |
4186 | ||
4187 | static int ext4_inode_blocks_set(struct ext4_inode *raw_inode, | |
4188 | struct ext4_inode_info *ei) | |
4189 | { | |
4190 | struct inode *inode = &(ei->vfs_inode); | |
4191 | u64 i_blocks = READ_ONCE(inode->i_blocks); | |
4192 | struct super_block *sb = inode->i_sb; | |
4193 | ||
4194 | if (i_blocks <= ~0U) { | |
4195 | /* | |
4196 | * i_blocks can be represented in a 32 bit variable | |
4197 | * as multiple of 512 bytes | |
4198 | */ | |
4199 | raw_inode->i_blocks_lo = cpu_to_le32(i_blocks); | |
4200 | raw_inode->i_blocks_high = 0; | |
4201 | ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE); | |
4202 | return 0; | |
4203 | } | |
4204 | ||
4205 | /* | |
4206 | * This should never happen since sb->s_maxbytes should not have | |
4207 | * allowed this, sb->s_maxbytes was set according to the huge_file | |
4208 | * feature in ext4_fill_super(). | |
4209 | */ | |
4210 | if (!ext4_has_feature_huge_file(sb)) | |
4211 | return -EFSCORRUPTED; | |
4212 | ||
4213 | if (i_blocks <= 0xffffffffffffULL) { | |
4214 | /* | |
4215 | * i_blocks can be represented in a 48 bit variable | |
4216 | * as multiple of 512 bytes | |
4217 | */ | |
4218 | raw_inode->i_blocks_lo = cpu_to_le32(i_blocks); | |
4219 | raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32); | |
4220 | ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE); | |
4221 | } else { | |
4222 | ext4_set_inode_flag(inode, EXT4_INODE_HUGE_FILE); | |
4223 | /* i_block is stored in file system block size */ | |
4224 | i_blocks = i_blocks >> (inode->i_blkbits - 9); | |
4225 | raw_inode->i_blocks_lo = cpu_to_le32(i_blocks); | |
4226 | raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32); | |
4227 | } | |
4228 | return 0; | |
4229 | } | |
4230 | ||
4231 | static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode) | |
4232 | { | |
4233 | struct ext4_inode_info *ei = EXT4_I(inode); | |
4234 | uid_t i_uid; | |
4235 | gid_t i_gid; | |
4236 | projid_t i_projid; | |
4237 | int block; | |
4238 | int err; | |
4239 | ||
4240 | err = ext4_inode_blocks_set(raw_inode, ei); | |
4241 | ||
4242 | raw_inode->i_mode = cpu_to_le16(inode->i_mode); | |
4243 | i_uid = i_uid_read(inode); | |
4244 | i_gid = i_gid_read(inode); | |
4245 | i_projid = from_kprojid(&init_user_ns, ei->i_projid); | |
4246 | if (!(test_opt(inode->i_sb, NO_UID32))) { | |
4247 | raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid)); | |
4248 | raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid)); | |
4249 | /* | |
4250 | * Fix up interoperability with old kernels. Otherwise, | |
4251 | * old inodes get re-used with the upper 16 bits of the | |
4252 | * uid/gid intact. | |
4253 | */ | |
4254 | if (ei->i_dtime && list_empty(&ei->i_orphan)) { | |
4255 | raw_inode->i_uid_high = 0; | |
4256 | raw_inode->i_gid_high = 0; | |
4257 | } else { | |
4258 | raw_inode->i_uid_high = | |
4259 | cpu_to_le16(high_16_bits(i_uid)); | |
4260 | raw_inode->i_gid_high = | |
4261 | cpu_to_le16(high_16_bits(i_gid)); | |
4262 | } | |
4263 | } else { | |
4264 | raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid)); | |
4265 | raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid)); | |
4266 | raw_inode->i_uid_high = 0; | |
4267 | raw_inode->i_gid_high = 0; | |
4268 | } | |
4269 | raw_inode->i_links_count = cpu_to_le16(inode->i_nlink); | |
4270 | ||
1bc33893 | 4271 | EXT4_INODE_SET_CTIME(inode, raw_inode); |
b898ab23 JL |
4272 | EXT4_INODE_SET_MTIME(inode, raw_inode); |
4273 | EXT4_INODE_SET_ATIME(inode, raw_inode); | |
9a1bf32c ZY |
4274 | EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode); |
4275 | ||
4276 | raw_inode->i_dtime = cpu_to_le32(ei->i_dtime); | |
4277 | raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF); | |
4278 | if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) | |
4279 | raw_inode->i_file_acl_high = | |
4280 | cpu_to_le16(ei->i_file_acl >> 32); | |
4281 | raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl); | |
4282 | ext4_isize_set(raw_inode, ei->i_disksize); | |
4283 | ||
4284 | raw_inode->i_generation = cpu_to_le32(inode->i_generation); | |
4285 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { | |
4286 | if (old_valid_dev(inode->i_rdev)) { | |
4287 | raw_inode->i_block[0] = | |
4288 | cpu_to_le32(old_encode_dev(inode->i_rdev)); | |
4289 | raw_inode->i_block[1] = 0; | |
4290 | } else { | |
4291 | raw_inode->i_block[0] = 0; | |
4292 | raw_inode->i_block[1] = | |
4293 | cpu_to_le32(new_encode_dev(inode->i_rdev)); | |
4294 | raw_inode->i_block[2] = 0; | |
4295 | } | |
4296 | } else if (!ext4_has_inline_data(inode)) { | |
4297 | for (block = 0; block < EXT4_N_BLOCKS; block++) | |
4298 | raw_inode->i_block[block] = ei->i_data[block]; | |
4299 | } | |
4300 | ||
4301 | if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) { | |
4302 | u64 ivers = ext4_inode_peek_iversion(inode); | |
4303 | ||
4304 | raw_inode->i_disk_version = cpu_to_le32(ivers); | |
4305 | if (ei->i_extra_isize) { | |
4306 | if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) | |
4307 | raw_inode->i_version_hi = | |
4308 | cpu_to_le32(ivers >> 32); | |
4309 | raw_inode->i_extra_isize = | |
4310 | cpu_to_le16(ei->i_extra_isize); | |
4311 | } | |
4312 | } | |
4313 | ||
4314 | if (i_projid != EXT4_DEF_PROJID && | |
4315 | !ext4_has_feature_project(inode->i_sb)) | |
4316 | err = err ?: -EFSCORRUPTED; | |
4317 | ||
4318 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE && | |
4319 | EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) | |
4320 | raw_inode->i_projid = cpu_to_le32(i_projid); | |
4321 | ||
4322 | ext4_inode_csum_set(inode, raw_inode, ei); | |
4323 | return err; | |
4324 | } | |
4325 | ||
ac27a0ec | 4326 | /* |
617ba13b | 4327 | * ext4_get_inode_loc returns with an extra refcount against the inode's |
de01f484 ZY |
4328 | * underlying buffer_head on success. If we pass 'inode' and it does not |
4329 | * have in-inode xattr, we have all inode data in memory that is needed | |
4330 | * to recreate the on-disk version of this inode. | |
ac27a0ec | 4331 | */ |
8016e29f | 4332 | static int __ext4_get_inode_loc(struct super_block *sb, unsigned long ino, |
de01f484 | 4333 | struct inode *inode, struct ext4_iloc *iloc, |
8016e29f | 4334 | ext4_fsblk_t *ret_block) |
ac27a0ec | 4335 | { |
240799cd TT |
4336 | struct ext4_group_desc *gdp; |
4337 | struct buffer_head *bh; | |
240799cd | 4338 | ext4_fsblk_t block; |
02f03c42 | 4339 | struct blk_plug plug; |
240799cd TT |
4340 | int inodes_per_block, inode_offset; |
4341 | ||
3a06d778 | 4342 | iloc->bh = NULL; |
8016e29f HS |
4343 | if (ino < EXT4_ROOT_INO || |
4344 | ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) | |
6a797d27 | 4345 | return -EFSCORRUPTED; |
ac27a0ec | 4346 | |
8016e29f | 4347 | iloc->block_group = (ino - 1) / EXT4_INODES_PER_GROUP(sb); |
240799cd TT |
4348 | gdp = ext4_get_group_desc(sb, iloc->block_group, NULL); |
4349 | if (!gdp) | |
ac27a0ec DK |
4350 | return -EIO; |
4351 | ||
240799cd TT |
4352 | /* |
4353 | * Figure out the offset within the block group inode table | |
4354 | */ | |
00d09882 | 4355 | inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; |
8016e29f | 4356 | inode_offset = ((ino - 1) % |
240799cd | 4357 | EXT4_INODES_PER_GROUP(sb)); |
240799cd TT |
4358 | iloc->offset = (inode_offset % inodes_per_block) * EXT4_INODE_SIZE(sb); |
4359 | ||
eee22187 BL |
4360 | block = ext4_inode_table(sb, gdp); |
4361 | if ((block <= le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) || | |
4362 | (block >= ext4_blocks_count(EXT4_SB(sb)->s_es))) { | |
4363 | ext4_error(sb, "Invalid inode table block %llu in " | |
4364 | "block_group %u", block, iloc->block_group); | |
4365 | return -EFSCORRUPTED; | |
4366 | } | |
4367 | block += (inode_offset / inodes_per_block); | |
4368 | ||
240799cd | 4369 | bh = sb_getblk(sb, block); |
aebf0243 | 4370 | if (unlikely(!bh)) |
860d21e2 | 4371 | return -ENOMEM; |
8e33fadf ZY |
4372 | if (ext4_buffer_uptodate(bh)) |
4373 | goto has_buffer; | |
9c83a923 | 4374 | |
8e33fadf | 4375 | lock_buffer(bh); |
f2c77973 ZY |
4376 | if (ext4_buffer_uptodate(bh)) { |
4377 | /* Someone brought it uptodate while we waited */ | |
4378 | unlock_buffer(bh); | |
4379 | goto has_buffer; | |
4380 | } | |
4381 | ||
8e33fadf ZY |
4382 | /* |
4383 | * If we have all information of the inode in memory and this | |
4384 | * is the only valid inode in the block, we need not read the | |
4385 | * block. | |
4386 | */ | |
de01f484 | 4387 | if (inode && !ext4_test_inode_state(inode, EXT4_STATE_XATTR)) { |
8e33fadf ZY |
4388 | struct buffer_head *bitmap_bh; |
4389 | int i, start; | |
ac27a0ec | 4390 | |
8e33fadf | 4391 | start = inode_offset & ~(inodes_per_block - 1); |
ac27a0ec | 4392 | |
8e33fadf ZY |
4393 | /* Is the inode bitmap in cache? */ |
4394 | bitmap_bh = sb_getblk(sb, ext4_inode_bitmap(sb, gdp)); | |
4395 | if (unlikely(!bitmap_bh)) | |
4396 | goto make_io; | |
ac27a0ec | 4397 | |
8e33fadf ZY |
4398 | /* |
4399 | * If the inode bitmap isn't in cache then the | |
4400 | * optimisation may end up performing two reads instead | |
4401 | * of one, so skip it. | |
4402 | */ | |
4403 | if (!buffer_uptodate(bitmap_bh)) { | |
ac27a0ec | 4404 | brelse(bitmap_bh); |
8e33fadf | 4405 | goto make_io; |
ac27a0ec | 4406 | } |
8e33fadf ZY |
4407 | for (i = start; i < start + inodes_per_block; i++) { |
4408 | if (i == inode_offset) | |
4409 | continue; | |
4410 | if (ext4_test_bit(i, bitmap_bh->b_data)) | |
4411 | break; | |
ac27a0ec | 4412 | } |
8e33fadf ZY |
4413 | brelse(bitmap_bh); |
4414 | if (i == start + inodes_per_block) { | |
de01f484 ZY |
4415 | struct ext4_inode *raw_inode = |
4416 | (struct ext4_inode *) (bh->b_data + iloc->offset); | |
4417 | ||
8e33fadf ZY |
4418 | /* all other inodes are free, so skip I/O */ |
4419 | memset(bh->b_data, 0, bh->b_size); | |
de01f484 ZY |
4420 | if (!ext4_test_inode_state(inode, EXT4_STATE_NEW)) |
4421 | ext4_fill_raw_inode(inode, raw_inode); | |
8e33fadf ZY |
4422 | set_buffer_uptodate(bh); |
4423 | unlock_buffer(bh); | |
4424 | goto has_buffer; | |
4425 | } | |
4426 | } | |
ac27a0ec DK |
4427 | |
4428 | make_io: | |
8e33fadf ZY |
4429 | /* |
4430 | * If we need to do any I/O, try to pre-readahead extra | |
4431 | * blocks from the inode table. | |
4432 | */ | |
4433 | blk_start_plug(&plug); | |
4434 | if (EXT4_SB(sb)->s_inode_readahead_blks) { | |
4435 | ext4_fsblk_t b, end, table; | |
4436 | unsigned num; | |
4437 | __u32 ra_blks = EXT4_SB(sb)->s_inode_readahead_blks; | |
4438 | ||
4439 | table = ext4_inode_table(sb, gdp); | |
4440 | /* s_inode_readahead_blks is always a power of 2 */ | |
4441 | b = block & ~((ext4_fsblk_t) ra_blks - 1); | |
4442 | if (table > b) | |
4443 | b = table; | |
4444 | end = b + ra_blks; | |
4445 | num = EXT4_INODES_PER_GROUP(sb); | |
4446 | if (ext4_has_group_desc_csum(sb)) | |
4447 | num -= ext4_itable_unused_count(sb, gdp); | |
4448 | table += num / inodes_per_block; | |
4449 | if (end > table) | |
4450 | end = table; | |
4451 | while (b <= end) | |
4452 | ext4_sb_breadahead_unmovable(sb, b++); | |
4453 | } | |
240799cd | 4454 | |
8e33fadf ZY |
4455 | /* |
4456 | * There are other valid inodes in the buffer, this inode | |
4457 | * has in-inode xattrs, or we don't have this inode in memory. | |
4458 | * Read the block from disk. | |
4459 | */ | |
4460 | trace_ext4_load_inode(sb, ino); | |
4461 | ext4_read_bh_nowait(bh, REQ_META | REQ_PRIO, NULL); | |
4462 | blk_finish_plug(&plug); | |
4463 | wait_on_buffer(bh); | |
4464 | ext4_simulate_fail_bh(sb, bh, EXT4_SIM_INODE_EIO); | |
4465 | if (!buffer_uptodate(bh)) { | |
4466 | if (ret_block) | |
4467 | *ret_block = block; | |
4468 | brelse(bh); | |
4469 | return -EIO; | |
ac27a0ec DK |
4470 | } |
4471 | has_buffer: | |
4472 | iloc->bh = bh; | |
4473 | return 0; | |
4474 | } | |
4475 | ||
8016e29f HS |
4476 | static int __ext4_get_inode_loc_noinmem(struct inode *inode, |
4477 | struct ext4_iloc *iloc) | |
4478 | { | |
c27c29c6 | 4479 | ext4_fsblk_t err_blk = 0; |
8016e29f HS |
4480 | int ret; |
4481 | ||
de01f484 | 4482 | ret = __ext4_get_inode_loc(inode->i_sb, inode->i_ino, NULL, iloc, |
8016e29f HS |
4483 | &err_blk); |
4484 | ||
4485 | if (ret == -EIO) | |
4486 | ext4_error_inode_block(inode, err_blk, EIO, | |
4487 | "unable to read itable block"); | |
4488 | ||
4489 | return ret; | |
4490 | } | |
4491 | ||
617ba13b | 4492 | int ext4_get_inode_loc(struct inode *inode, struct ext4_iloc *iloc) |
ac27a0ec | 4493 | { |
c27c29c6 | 4494 | ext4_fsblk_t err_blk = 0; |
8016e29f HS |
4495 | int ret; |
4496 | ||
de01f484 ZY |
4497 | ret = __ext4_get_inode_loc(inode->i_sb, inode->i_ino, inode, iloc, |
4498 | &err_blk); | |
8016e29f HS |
4499 | |
4500 | if (ret == -EIO) | |
4501 | ext4_error_inode_block(inode, err_blk, EIO, | |
4502 | "unable to read itable block"); | |
4503 | ||
4504 | return ret; | |
4505 | } | |
4506 | ||
4507 | ||
4508 | int ext4_get_fc_inode_loc(struct super_block *sb, unsigned long ino, | |
4509 | struct ext4_iloc *iloc) | |
4510 | { | |
de01f484 | 4511 | return __ext4_get_inode_loc(sb, ino, NULL, iloc, NULL); |
ac27a0ec DK |
4512 | } |
4513 | ||
a8ab6d38 | 4514 | static bool ext4_should_enable_dax(struct inode *inode) |
6642586b | 4515 | { |
a8ab6d38 IW |
4516 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
4517 | ||
9cb20f94 | 4518 | if (test_opt2(inode->i_sb, DAX_NEVER)) |
6642586b RZ |
4519 | return false; |
4520 | if (!S_ISREG(inode->i_mode)) | |
4521 | return false; | |
4522 | if (ext4_should_journal_data(inode)) | |
4523 | return false; | |
4524 | if (ext4_has_inline_data(inode)) | |
4525 | return false; | |
592ddec7 | 4526 | if (ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT)) |
6642586b | 4527 | return false; |
c93d8f88 EB |
4528 | if (ext4_test_inode_flag(inode, EXT4_INODE_VERITY)) |
4529 | return false; | |
a8ab6d38 IW |
4530 | if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) |
4531 | return false; | |
4532 | if (test_opt(inode->i_sb, DAX_ALWAYS)) | |
4533 | return true; | |
4534 | ||
b383a73f | 4535 | return ext4_test_inode_flag(inode, EXT4_INODE_DAX); |
6642586b RZ |
4536 | } |
4537 | ||
043546e4 | 4538 | void ext4_set_inode_flags(struct inode *inode, bool init) |
ac27a0ec | 4539 | { |
617ba13b | 4540 | unsigned int flags = EXT4_I(inode)->i_flags; |
00a1a053 | 4541 | unsigned int new_fl = 0; |
ac27a0ec | 4542 | |
043546e4 IW |
4543 | WARN_ON_ONCE(IS_DAX(inode) && init); |
4544 | ||
617ba13b | 4545 | if (flags & EXT4_SYNC_FL) |
00a1a053 | 4546 | new_fl |= S_SYNC; |
617ba13b | 4547 | if (flags & EXT4_APPEND_FL) |
00a1a053 | 4548 | new_fl |= S_APPEND; |
617ba13b | 4549 | if (flags & EXT4_IMMUTABLE_FL) |
00a1a053 | 4550 | new_fl |= S_IMMUTABLE; |
617ba13b | 4551 | if (flags & EXT4_NOATIME_FL) |
00a1a053 | 4552 | new_fl |= S_NOATIME; |
617ba13b | 4553 | if (flags & EXT4_DIRSYNC_FL) |
00a1a053 | 4554 | new_fl |= S_DIRSYNC; |
043546e4 IW |
4555 | |
4556 | /* Because of the way inode_set_flags() works we must preserve S_DAX | |
4557 | * here if already set. */ | |
4558 | new_fl |= (inode->i_flags & S_DAX); | |
4559 | if (init && ext4_should_enable_dax(inode)) | |
923ae0ff | 4560 | new_fl |= S_DAX; |
043546e4 | 4561 | |
2ee6a576 EB |
4562 | if (flags & EXT4_ENCRYPT_FL) |
4563 | new_fl |= S_ENCRYPTED; | |
b886ee3e GKB |
4564 | if (flags & EXT4_CASEFOLD_FL) |
4565 | new_fl |= S_CASEFOLD; | |
c93d8f88 EB |
4566 | if (flags & EXT4_VERITY_FL) |
4567 | new_fl |= S_VERITY; | |
5f16f322 | 4568 | inode_set_flags(inode, new_fl, |
2ee6a576 | 4569 | S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX| |
c93d8f88 | 4570 | S_ENCRYPTED|S_CASEFOLD|S_VERITY); |
ac27a0ec DK |
4571 | } |
4572 | ||
0fc1b451 | 4573 | static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode, |
de9a55b8 | 4574 | struct ext4_inode_info *ei) |
0fc1b451 AK |
4575 | { |
4576 | blkcnt_t i_blocks ; | |
8180a562 AK |
4577 | struct inode *inode = &(ei->vfs_inode); |
4578 | struct super_block *sb = inode->i_sb; | |
0fc1b451 | 4579 | |
e2b911c5 | 4580 | if (ext4_has_feature_huge_file(sb)) { |
0fc1b451 AK |
4581 | /* we are using combined 48 bit field */ |
4582 | i_blocks = ((u64)le16_to_cpu(raw_inode->i_blocks_high)) << 32 | | |
4583 | le32_to_cpu(raw_inode->i_blocks_lo); | |
07a03824 | 4584 | if (ext4_test_inode_flag(inode, EXT4_INODE_HUGE_FILE)) { |
8180a562 AK |
4585 | /* i_blocks represent file system block size */ |
4586 | return i_blocks << (inode->i_blkbits - 9); | |
4587 | } else { | |
4588 | return i_blocks; | |
4589 | } | |
0fc1b451 AK |
4590 | } else { |
4591 | return le32_to_cpu(raw_inode->i_blocks_lo); | |
4592 | } | |
4593 | } | |
ff9ddf7e | 4594 | |
eb9b5f01 | 4595 | static inline int ext4_iget_extra_inode(struct inode *inode, |
152a7b0a TM |
4596 | struct ext4_inode *raw_inode, |
4597 | struct ext4_inode_info *ei) | |
4598 | { | |
4599 | __le32 *magic = (void *)raw_inode + | |
4600 | EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize; | |
eb9b5f01 | 4601 | |
fd7e672e | 4602 | if (EXT4_INODE_HAS_XATTR_SPACE(inode) && |
290ab230 | 4603 | *magic == cpu_to_le32(EXT4_XATTR_MAGIC)) { |
1dcdce59 YB |
4604 | int err; |
4605 | ||
152a7b0a | 4606 | ext4_set_inode_state(inode, EXT4_STATE_XATTR); |
1dcdce59 YB |
4607 | err = ext4_find_inline_data_nolock(inode); |
4608 | if (!err && ext4_has_inline_data(inode)) | |
4609 | ext4_set_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); | |
4610 | return err; | |
f19d5870 TM |
4611 | } else |
4612 | EXT4_I(inode)->i_inline_off = 0; | |
eb9b5f01 | 4613 | return 0; |
152a7b0a TM |
4614 | } |
4615 | ||
040cb378 LX |
4616 | int ext4_get_projid(struct inode *inode, kprojid_t *projid) |
4617 | { | |
0b7b7779 | 4618 | if (!ext4_has_feature_project(inode->i_sb)) |
040cb378 LX |
4619 | return -EOPNOTSUPP; |
4620 | *projid = EXT4_I(inode)->i_projid; | |
4621 | return 0; | |
4622 | } | |
4623 | ||
e254d1af EG |
4624 | /* |
4625 | * ext4 has self-managed i_version for ea inodes, it stores the lower 32bit of | |
4626 | * refcount in i_version, so use raw values if inode has EXT4_EA_INODE_FL flag | |
4627 | * set. | |
4628 | */ | |
4629 | static inline void ext4_inode_set_iversion_queried(struct inode *inode, u64 val) | |
4630 | { | |
4631 | if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) | |
4632 | inode_set_iversion_raw(inode, val); | |
4633 | else | |
4634 | inode_set_iversion_queried(inode, val); | |
4635 | } | |
e254d1af | 4636 | |
b3e6bcb9 TT |
4637 | static const char *check_igot_inode(struct inode *inode, ext4_iget_flags flags) |
4638 | ||
4639 | { | |
4640 | if (flags & EXT4_IGET_EA_INODE) { | |
4641 | if (!(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) | |
4642 | return "missing EA_INODE flag"; | |
2bc7e7c1 TT |
4643 | if (ext4_test_inode_state(inode, EXT4_STATE_XATTR) || |
4644 | EXT4_I(inode)->i_file_acl) | |
4645 | return "ea_inode with extended attributes"; | |
b3e6bcb9 TT |
4646 | } else { |
4647 | if ((EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) | |
4648 | return "unexpected EA_INODE flag"; | |
4649 | } | |
4650 | if (is_bad_inode(inode) && !(flags & EXT4_IGET_BAD)) | |
4651 | return "unexpected bad inode w/o EXT4_IGET_BAD"; | |
4652 | return NULL; | |
4653 | } | |
4654 | ||
8a363970 TT |
4655 | struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, |
4656 | ext4_iget_flags flags, const char *function, | |
4657 | unsigned int line) | |
ac27a0ec | 4658 | { |
617ba13b MC |
4659 | struct ext4_iloc iloc; |
4660 | struct ext4_inode *raw_inode; | |
1d1fe1ee | 4661 | struct ext4_inode_info *ei; |
bd2c38cf | 4662 | struct ext4_super_block *es = EXT4_SB(sb)->s_es; |
1d1fe1ee | 4663 | struct inode *inode; |
b3e6bcb9 | 4664 | const char *err_str; |
b436b9be | 4665 | journal_t *journal = EXT4_SB(sb)->s_journal; |
1d1fe1ee | 4666 | long ret; |
7e6e1ef4 | 4667 | loff_t size; |
ac27a0ec | 4668 | int block; |
08cefc7a EB |
4669 | uid_t i_uid; |
4670 | gid_t i_gid; | |
040cb378 | 4671 | projid_t i_projid; |
ac27a0ec | 4672 | |
191ce178 | 4673 | if ((!(flags & EXT4_IGET_SPECIAL) && |
bd2c38cf JK |
4674 | ((ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) || |
4675 | ino == le32_to_cpu(es->s_usr_quota_inum) || | |
4676 | ino == le32_to_cpu(es->s_grp_quota_inum) || | |
02f310fc JK |
4677 | ino == le32_to_cpu(es->s_prj_quota_inum) || |
4678 | ino == le32_to_cpu(es->s_orphan_file_inum))) || | |
8a363970 | 4679 | (ino < EXT4_ROOT_INO) || |
bd2c38cf | 4680 | (ino > le32_to_cpu(es->s_inodes_count))) { |
8a363970 TT |
4681 | if (flags & EXT4_IGET_HANDLE) |
4682 | return ERR_PTR(-ESTALE); | |
014c9caa | 4683 | __ext4_error(sb, function, line, false, EFSCORRUPTED, 0, |
8a363970 TT |
4684 | "inode #%lu: comm %s: iget: illegal inode #", |
4685 | ino, current->comm); | |
4686 | return ERR_PTR(-EFSCORRUPTED); | |
4687 | } | |
4688 | ||
1d1fe1ee DH |
4689 | inode = iget_locked(sb, ino); |
4690 | if (!inode) | |
4691 | return ERR_PTR(-ENOMEM); | |
b3e6bcb9 TT |
4692 | if (!(inode->i_state & I_NEW)) { |
4693 | if ((err_str = check_igot_inode(inode, flags)) != NULL) { | |
4694 | ext4_error_inode(inode, function, line, 0, err_str); | |
4695 | iput(inode); | |
4696 | return ERR_PTR(-EFSCORRUPTED); | |
4697 | } | |
1d1fe1ee | 4698 | return inode; |
b3e6bcb9 | 4699 | } |
1d1fe1ee DH |
4700 | |
4701 | ei = EXT4_I(inode); | |
7dc57615 | 4702 | iloc.bh = NULL; |
ac27a0ec | 4703 | |
8016e29f | 4704 | ret = __ext4_get_inode_loc_noinmem(inode, &iloc); |
1d1fe1ee | 4705 | if (ret < 0) |
ac27a0ec | 4706 | goto bad_inode; |
617ba13b | 4707 | raw_inode = ext4_raw_inode(&iloc); |
814525f4 | 4708 | |
8a363970 TT |
4709 | if ((flags & EXT4_IGET_HANDLE) && |
4710 | (raw_inode->i_links_count == 0) && (raw_inode->i_mode == 0)) { | |
4711 | ret = -ESTALE; | |
4712 | goto bad_inode; | |
4713 | } | |
4714 | ||
814525f4 DW |
4715 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { |
4716 | ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize); | |
4717 | if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize > | |
2dc8d9e1 EB |
4718 | EXT4_INODE_SIZE(inode->i_sb) || |
4719 | (ei->i_extra_isize & 3)) { | |
8a363970 TT |
4720 | ext4_error_inode(inode, function, line, 0, |
4721 | "iget: bad extra_isize %u " | |
4722 | "(inode size %u)", | |
2dc8d9e1 EB |
4723 | ei->i_extra_isize, |
4724 | EXT4_INODE_SIZE(inode->i_sb)); | |
6a797d27 | 4725 | ret = -EFSCORRUPTED; |
814525f4 DW |
4726 | goto bad_inode; |
4727 | } | |
4728 | } else | |
4729 | ei->i_extra_isize = 0; | |
4730 | ||
4731 | /* Precompute checksum seed for inode metadata */ | |
9aa5d32b | 4732 | if (ext4_has_metadata_csum(sb)) { |
814525f4 DW |
4733 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
4734 | __u32 csum; | |
4735 | __le32 inum = cpu_to_le32(inode->i_ino); | |
4736 | __le32 gen = raw_inode->i_generation; | |
4737 | csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, | |
4738 | sizeof(inum)); | |
4739 | ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, | |
4740 | sizeof(gen)); | |
4741 | } | |
4742 | ||
8016e29f HS |
4743 | if ((!ext4_inode_csum_verify(inode, raw_inode, ei) || |
4744 | ext4_simulate_fail(sb, EXT4_SIM_INODE_CRC)) && | |
4745 | (!(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY))) { | |
4746 | ext4_error_inode_err(inode, function, line, 0, | |
4747 | EFSBADCRC, "iget: checksum invalid"); | |
6a797d27 | 4748 | ret = -EFSBADCRC; |
814525f4 DW |
4749 | goto bad_inode; |
4750 | } | |
4751 | ||
ac27a0ec | 4752 | inode->i_mode = le16_to_cpu(raw_inode->i_mode); |
08cefc7a EB |
4753 | i_uid = (uid_t)le16_to_cpu(raw_inode->i_uid_low); |
4754 | i_gid = (gid_t)le16_to_cpu(raw_inode->i_gid_low); | |
0b7b7779 | 4755 | if (ext4_has_feature_project(sb) && |
040cb378 LX |
4756 | EXT4_INODE_SIZE(sb) > EXT4_GOOD_OLD_INODE_SIZE && |
4757 | EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) | |
4758 | i_projid = (projid_t)le32_to_cpu(raw_inode->i_projid); | |
4759 | else | |
4760 | i_projid = EXT4_DEF_PROJID; | |
4761 | ||
af5bc92d | 4762 | if (!(test_opt(inode->i_sb, NO_UID32))) { |
08cefc7a EB |
4763 | i_uid |= le16_to_cpu(raw_inode->i_uid_high) << 16; |
4764 | i_gid |= le16_to_cpu(raw_inode->i_gid_high) << 16; | |
ac27a0ec | 4765 | } |
08cefc7a EB |
4766 | i_uid_write(inode, i_uid); |
4767 | i_gid_write(inode, i_gid); | |
040cb378 | 4768 | ei->i_projid = make_kprojid(&init_user_ns, i_projid); |
bfe86848 | 4769 | set_nlink(inode, le16_to_cpu(raw_inode->i_links_count)); |
ac27a0ec | 4770 | |
353eb83c | 4771 | ext4_clear_state_flags(ei); /* Only relevant on 32-bit archs */ |
67cf5b09 | 4772 | ei->i_inline_off = 0; |
ac27a0ec DK |
4773 | ei->i_dir_start_lookup = 0; |
4774 | ei->i_dtime = le32_to_cpu(raw_inode->i_dtime); | |
4775 | /* We now have enough fields to check if the inode was active or not. | |
4776 | * This is needed because nfsd might try to access dead inodes | |
4777 | * the test is that same one that e2fsck uses | |
4778 | * NeilBrown 1999oct15 | |
4779 | */ | |
4780 | if (inode->i_nlink == 0) { | |
5cd74028 | 4781 | if ((inode->i_mode == 0 || flags & EXT4_IGET_SPECIAL || |
393d1d1d DTB |
4782 | !(EXT4_SB(inode->i_sb)->s_mount_state & EXT4_ORPHAN_FS)) && |
4783 | ino != EXT4_BOOT_LOADER_INO) { | |
5cd74028 BL |
4784 | /* this inode is deleted or unallocated */ |
4785 | if (flags & EXT4_IGET_SPECIAL) { | |
4786 | ext4_error_inode(inode, function, line, 0, | |
4787 | "iget: special inode unallocated"); | |
4788 | ret = -EFSCORRUPTED; | |
4789 | } else | |
4790 | ret = -ESTALE; | |
ac27a0ec DK |
4791 | goto bad_inode; |
4792 | } | |
4793 | /* The only unlinked inodes we let through here have | |
4794 | * valid i_mode and are being read by the orphan | |
4795 | * recovery code: that's fine, we're about to complete | |
393d1d1d DTB |
4796 | * the process of deleting those. |
4797 | * OR it is the EXT4_BOOT_LOADER_INO which is | |
4798 | * not initialized on a new filesystem. */ | |
ac27a0ec | 4799 | } |
ac27a0ec | 4800 | ei->i_flags = le32_to_cpu(raw_inode->i_flags); |
043546e4 | 4801 | ext4_set_inode_flags(inode, true); |
0fc1b451 | 4802 | inode->i_blocks = ext4_inode_blocks(raw_inode, ei); |
7973c0c1 | 4803 | ei->i_file_acl = le32_to_cpu(raw_inode->i_file_acl_lo); |
e2b911c5 | 4804 | if (ext4_has_feature_64bit(sb)) |
a1ddeb7e BP |
4805 | ei->i_file_acl |= |
4806 | ((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32; | |
e08ac99f | 4807 | inode->i_size = ext4_isize(sb, raw_inode); |
7e6e1ef4 | 4808 | if ((size = i_size_read(inode)) < 0) { |
8a363970 TT |
4809 | ext4_error_inode(inode, function, line, 0, |
4810 | "iget: bad i_size value: %lld", size); | |
7e6e1ef4 DW |
4811 | ret = -EFSCORRUPTED; |
4812 | goto bad_inode; | |
4813 | } | |
48a34311 JK |
4814 | /* |
4815 | * If dir_index is not enabled but there's dir with INDEX flag set, | |
4816 | * we'd normally treat htree data as empty space. But with metadata | |
4817 | * checksumming that corrupts checksums so forbid that. | |
4818 | */ | |
4819 | if (!ext4_has_feature_dir_index(sb) && ext4_has_metadata_csum(sb) && | |
4820 | ext4_test_inode_flag(inode, EXT4_INODE_INDEX)) { | |
4821 | ext4_error_inode(inode, function, line, 0, | |
4822 | "iget: Dir with htree data on filesystem without dir_index feature."); | |
4823 | ret = -EFSCORRUPTED; | |
4824 | goto bad_inode; | |
4825 | } | |
ac27a0ec | 4826 | ei->i_disksize = inode->i_size; |
a9e7f447 DM |
4827 | #ifdef CONFIG_QUOTA |
4828 | ei->i_reserved_quota = 0; | |
4829 | #endif | |
ac27a0ec DK |
4830 | inode->i_generation = le32_to_cpu(raw_inode->i_generation); |
4831 | ei->i_block_group = iloc.block_group; | |
a4912123 | 4832 | ei->i_last_alloc_group = ~0; |
ac27a0ec DK |
4833 | /* |
4834 | * NOTE! The in-memory inode i_data array is in little-endian order | |
4835 | * even on big-endian machines: we do NOT byteswap the block numbers! | |
4836 | */ | |
617ba13b | 4837 | for (block = 0; block < EXT4_N_BLOCKS; block++) |
ac27a0ec DK |
4838 | ei->i_data[block] = raw_inode->i_block[block]; |
4839 | INIT_LIST_HEAD(&ei->i_orphan); | |
aa75f4d3 | 4840 | ext4_fc_init_inode(&ei->vfs_inode); |
ac27a0ec | 4841 | |
b436b9be JK |
4842 | /* |
4843 | * Set transaction id's of transactions that have to be committed | |
4844 | * to finish f[data]sync. We set them to currently running transaction | |
4845 | * as we cannot be sure that the inode or some of its metadata isn't | |
4846 | * part of the transaction - the inode could have been reclaimed and | |
4847 | * now it is reread from disk. | |
4848 | */ | |
4849 | if (journal) { | |
4850 | transaction_t *transaction; | |
4851 | tid_t tid; | |
4852 | ||
a931da6a | 4853 | read_lock(&journal->j_state_lock); |
b436b9be JK |
4854 | if (journal->j_running_transaction) |
4855 | transaction = journal->j_running_transaction; | |
4856 | else | |
4857 | transaction = journal->j_committing_transaction; | |
4858 | if (transaction) | |
4859 | tid = transaction->t_tid; | |
4860 | else | |
4861 | tid = journal->j_commit_sequence; | |
a931da6a | 4862 | read_unlock(&journal->j_state_lock); |
b436b9be JK |
4863 | ei->i_sync_tid = tid; |
4864 | ei->i_datasync_tid = tid; | |
4865 | } | |
4866 | ||
0040d987 | 4867 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { |
ac27a0ec DK |
4868 | if (ei->i_extra_isize == 0) { |
4869 | /* The extra space is currently unused. Use it. */ | |
2dc8d9e1 | 4870 | BUILD_BUG_ON(sizeof(struct ext4_inode) & 3); |
617ba13b MC |
4871 | ei->i_extra_isize = sizeof(struct ext4_inode) - |
4872 | EXT4_GOOD_OLD_INODE_SIZE; | |
ac27a0ec | 4873 | } else { |
eb9b5f01 TT |
4874 | ret = ext4_iget_extra_inode(inode, raw_inode, ei); |
4875 | if (ret) | |
4876 | goto bad_inode; | |
ac27a0ec | 4877 | } |
814525f4 | 4878 | } |
ac27a0ec | 4879 | |
1bc33893 | 4880 | EXT4_INODE_GET_CTIME(inode, raw_inode); |
b898ab23 JL |
4881 | EXT4_INODE_GET_ATIME(inode, raw_inode); |
4882 | EXT4_INODE_GET_MTIME(inode, raw_inode); | |
ef7f3835 KS |
4883 | EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode); |
4884 | ||
ed3654eb | 4885 | if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) { |
ee73f9a5 JL |
4886 | u64 ivers = le32_to_cpu(raw_inode->i_disk_version); |
4887 | ||
c4f65706 TT |
4888 | if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) { |
4889 | if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi)) | |
ee73f9a5 | 4890 | ivers |= |
c4f65706 TT |
4891 | (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32; |
4892 | } | |
e254d1af | 4893 | ext4_inode_set_iversion_queried(inode, ivers); |
25ec56b5 JNC |
4894 | } |
4895 | ||
c4b5a614 | 4896 | ret = 0; |
485c26ec | 4897 | if (ei->i_file_acl && |
ce9f24cc | 4898 | !ext4_inode_block_valid(inode, ei->i_file_acl, 1)) { |
8a363970 TT |
4899 | ext4_error_inode(inode, function, line, 0, |
4900 | "iget: bad extended attribute block %llu", | |
24676da4 | 4901 | ei->i_file_acl); |
6a797d27 | 4902 | ret = -EFSCORRUPTED; |
485c26ec | 4903 | goto bad_inode; |
f19d5870 | 4904 | } else if (!ext4_has_inline_data(inode)) { |
bc716523 | 4905 | /* validate the block references in the inode */ |
8016e29f HS |
4906 | if (!(EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY) && |
4907 | (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || | |
4908 | (S_ISLNK(inode->i_mode) && | |
4909 | !ext4_inode_is_fast_symlink(inode)))) { | |
bc716523 | 4910 | if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) |
f19d5870 | 4911 | ret = ext4_ext_check_inode(inode); |
bc716523 LS |
4912 | else |
4913 | ret = ext4_ind_check_inode(inode); | |
f19d5870 | 4914 | } |
fe2c8191 | 4915 | } |
567f3e9a | 4916 | if (ret) |
de9a55b8 | 4917 | goto bad_inode; |
7a262f7c | 4918 | |
ac27a0ec | 4919 | if (S_ISREG(inode->i_mode)) { |
617ba13b | 4920 | inode->i_op = &ext4_file_inode_operations; |
be64f884 | 4921 | inode->i_fop = &ext4_file_operations; |
617ba13b | 4922 | ext4_set_aops(inode); |
ac27a0ec | 4923 | } else if (S_ISDIR(inode->i_mode)) { |
617ba13b MC |
4924 | inode->i_op = &ext4_dir_inode_operations; |
4925 | inode->i_fop = &ext4_dir_operations; | |
ac27a0ec | 4926 | } else if (S_ISLNK(inode->i_mode)) { |
6390d33b LR |
4927 | /* VFS does not allow setting these so must be corruption */ |
4928 | if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) { | |
8a363970 TT |
4929 | ext4_error_inode(inode, function, line, 0, |
4930 | "iget: immutable or append flags " | |
4931 | "not allowed on symlinks"); | |
6390d33b LR |
4932 | ret = -EFSCORRUPTED; |
4933 | goto bad_inode; | |
4934 | } | |
592ddec7 | 4935 | if (IS_ENCRYPTED(inode)) { |
a7a67e8a | 4936 | inode->i_op = &ext4_encrypted_symlink_inode_operations; |
a7a67e8a | 4937 | } else if (ext4_inode_is_fast_symlink(inode)) { |
75e7566b | 4938 | inode->i_link = (char *)ei->i_data; |
617ba13b | 4939 | inode->i_op = &ext4_fast_symlink_inode_operations; |
e83c1397 DG |
4940 | nd_terminate_link(ei->i_data, inode->i_size, |
4941 | sizeof(ei->i_data) - 1); | |
4942 | } else { | |
617ba13b | 4943 | inode->i_op = &ext4_symlink_inode_operations; |
ac27a0ec | 4944 | } |
563bdd61 TT |
4945 | } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || |
4946 | S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { | |
617ba13b | 4947 | inode->i_op = &ext4_special_inode_operations; |
ac27a0ec DK |
4948 | if (raw_inode->i_block[0]) |
4949 | init_special_inode(inode, inode->i_mode, | |
4950 | old_decode_dev(le32_to_cpu(raw_inode->i_block[0]))); | |
4951 | else | |
4952 | init_special_inode(inode, inode->i_mode, | |
4953 | new_decode_dev(le32_to_cpu(raw_inode->i_block[1]))); | |
393d1d1d DTB |
4954 | } else if (ino == EXT4_BOOT_LOADER_INO) { |
4955 | make_bad_inode(inode); | |
563bdd61 | 4956 | } else { |
6a797d27 | 4957 | ret = -EFSCORRUPTED; |
8a363970 TT |
4958 | ext4_error_inode(inode, function, line, 0, |
4959 | "iget: bogus i_mode (%o)", inode->i_mode); | |
563bdd61 | 4960 | goto bad_inode; |
ac27a0ec | 4961 | } |
8216776c | 4962 | if (IS_CASEFOLDED(inode) && !ext4_has_feature_casefold(inode->i_sb)) { |
6456ca65 TT |
4963 | ext4_error_inode(inode, function, line, 0, |
4964 | "casefold flag without casefold feature"); | |
8216776c EB |
4965 | ret = -EFSCORRUPTED; |
4966 | goto bad_inode; | |
4967 | } | |
b3e6bcb9 TT |
4968 | if ((err_str = check_igot_inode(inode, flags)) != NULL) { |
4969 | ext4_error_inode(inode, function, line, 0, err_str); | |
4970 | ret = -EFSCORRUPTED; | |
63b1e9bc BL |
4971 | goto bad_inode; |
4972 | } | |
dec214d0 | 4973 | |
63b1e9bc | 4974 | brelse(iloc.bh); |
1d1fe1ee DH |
4975 | unlock_new_inode(inode); |
4976 | return inode; | |
ac27a0ec DK |
4977 | |
4978 | bad_inode: | |
567f3e9a | 4979 | brelse(iloc.bh); |
1d1fe1ee DH |
4980 | iget_failed(inode); |
4981 | return ERR_PTR(ret); | |
ac27a0ec DK |
4982 | } |
4983 | ||
3f19b2ab DH |
4984 | static void __ext4_update_other_inode_time(struct super_block *sb, |
4985 | unsigned long orig_ino, | |
4986 | unsigned long ino, | |
4987 | struct ext4_inode *raw_inode) | |
a26f4992 | 4988 | { |
3f19b2ab DH |
4989 | struct inode *inode; |
4990 | ||
4991 | inode = find_inode_by_ino_rcu(sb, ino); | |
4992 | if (!inode) | |
4993 | return; | |
a26f4992 | 4994 | |
ed296c6c | 4995 | if (!inode_is_dirtytime_only(inode)) |
3f19b2ab DH |
4996 | return; |
4997 | ||
a26f4992 | 4998 | spin_lock(&inode->i_lock); |
ed296c6c | 4999 | if (inode_is_dirtytime_only(inode)) { |
a26f4992 TT |
5000 | struct ext4_inode_info *ei = EXT4_I(inode); |
5001 | ||
5fcd5750 | 5002 | inode->i_state &= ~I_DIRTY_TIME; |
a26f4992 TT |
5003 | spin_unlock(&inode->i_lock); |
5004 | ||
5005 | spin_lock(&ei->i_raw_lock); | |
1bc33893 | 5006 | EXT4_INODE_SET_CTIME(inode, raw_inode); |
b898ab23 JL |
5007 | EXT4_INODE_SET_MTIME(inode, raw_inode); |
5008 | EXT4_INODE_SET_ATIME(inode, raw_inode); | |
3f19b2ab | 5009 | ext4_inode_csum_set(inode, raw_inode, ei); |
a26f4992 | 5010 | spin_unlock(&ei->i_raw_lock); |
3f19b2ab DH |
5011 | trace_ext4_other_inode_update_time(inode, orig_ino); |
5012 | return; | |
a26f4992 TT |
5013 | } |
5014 | spin_unlock(&inode->i_lock); | |
a26f4992 TT |
5015 | } |
5016 | ||
5017 | /* | |
5018 | * Opportunistically update the other time fields for other inodes in | |
5019 | * the same inode table block. | |
5020 | */ | |
5021 | static void ext4_update_other_inodes_time(struct super_block *sb, | |
5022 | unsigned long orig_ino, char *buf) | |
5023 | { | |
a26f4992 TT |
5024 | unsigned long ino; |
5025 | int i, inodes_per_block = EXT4_SB(sb)->s_inodes_per_block; | |
5026 | int inode_size = EXT4_INODE_SIZE(sb); | |
5027 | ||
0f0ff9a9 TT |
5028 | /* |
5029 | * Calculate the first inode in the inode table block. Inode | |
5030 | * numbers are one-based. That is, the first inode in a block | |
5031 | * (assuming 4k blocks and 256 byte inodes) is (n*16 + 1). | |
5032 | */ | |
5033 | ino = ((orig_ino - 1) & ~(inodes_per_block - 1)) + 1; | |
3f19b2ab | 5034 | rcu_read_lock(); |
a26f4992 TT |
5035 | for (i = 0; i < inodes_per_block; i++, ino++, buf += inode_size) { |
5036 | if (ino == orig_ino) | |
5037 | continue; | |
3f19b2ab DH |
5038 | __ext4_update_other_inode_time(sb, orig_ino, ino, |
5039 | (struct ext4_inode *)buf); | |
a26f4992 | 5040 | } |
3f19b2ab | 5041 | rcu_read_unlock(); |
a26f4992 TT |
5042 | } |
5043 | ||
664bd38b ZY |
5044 | /* |
5045 | * Post the struct inode info into an on-disk inode location in the | |
5046 | * buffer-cache. This gobbles the caller's reference to the | |
5047 | * buffer_head in the inode location struct. | |
5048 | * | |
5049 | * The caller must have write access to iloc->bh. | |
5050 | */ | |
5051 | static int ext4_do_update_inode(handle_t *handle, | |
5052 | struct inode *inode, | |
5053 | struct ext4_iloc *iloc) | |
5054 | { | |
5055 | struct ext4_inode *raw_inode = ext4_raw_inode(iloc); | |
5056 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5057 | struct buffer_head *bh = iloc->bh; | |
5058 | struct super_block *sb = inode->i_sb; | |
5059 | int err; | |
5060 | int need_datasync = 0, set_large_file = 0; | |
5061 | ||
5062 | spin_lock(&ei->i_raw_lock); | |
5063 | ||
5064 | /* | |
5065 | * For fields not tracked in the in-memory inode, initialise them | |
5066 | * to zero for new inodes. | |
5067 | */ | |
5068 | if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) | |
5069 | memset(raw_inode, 0, EXT4_SB(inode->i_sb)->s_inode_size); | |
5070 | ||
5071 | if (READ_ONCE(ei->i_disksize) != ext4_isize(inode->i_sb, raw_inode)) | |
5072 | need_datasync = 1; | |
5073 | if (ei->i_disksize > 0x7fffffffULL) { | |
5074 | if (!ext4_has_feature_large_file(sb) || | |
5075 | EXT4_SB(sb)->s_es->s_rev_level == cpu_to_le32(EXT4_GOOD_OLD_REV)) | |
5076 | set_large_file = 1; | |
5077 | } | |
5078 | ||
5079 | err = ext4_fill_raw_inode(inode, raw_inode); | |
202ee5df | 5080 | spin_unlock(&ei->i_raw_lock); |
baaae979 ZY |
5081 | if (err) { |
5082 | EXT4_ERROR_INODE(inode, "corrupted inode contents"); | |
5083 | goto out_brelse; | |
5084 | } | |
5085 | ||
1751e8a6 | 5086 | if (inode->i_sb->s_flags & SB_LAZYTIME) |
a26f4992 TT |
5087 | ext4_update_other_inodes_time(inode->i_sb, inode->i_ino, |
5088 | bh->b_data); | |
202ee5df | 5089 | |
830156c7 | 5090 | BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata"); |
7d8bd3c7 SL |
5091 | err = ext4_handle_dirty_metadata(handle, NULL, bh); |
5092 | if (err) | |
baaae979 | 5093 | goto out_error; |
19f5fb7a | 5094 | ext4_clear_inode_state(inode, EXT4_STATE_NEW); |
202ee5df | 5095 | if (set_large_file) { |
5d601255 | 5096 | BUFFER_TRACE(EXT4_SB(sb)->s_sbh, "get write access"); |
188c299e JK |
5097 | err = ext4_journal_get_write_access(handle, sb, |
5098 | EXT4_SB(sb)->s_sbh, | |
5099 | EXT4_JTR_NONE); | |
202ee5df | 5100 | if (err) |
baaae979 | 5101 | goto out_error; |
05c2c00f | 5102 | lock_buffer(EXT4_SB(sb)->s_sbh); |
e2b911c5 | 5103 | ext4_set_feature_large_file(sb); |
05c2c00f JK |
5104 | ext4_superblock_csum_set(sb); |
5105 | unlock_buffer(EXT4_SB(sb)->s_sbh); | |
202ee5df | 5106 | ext4_handle_sync(handle); |
a3f5cf14 JK |
5107 | err = ext4_handle_dirty_metadata(handle, NULL, |
5108 | EXT4_SB(sb)->s_sbh); | |
202ee5df | 5109 | } |
b71fc079 | 5110 | ext4_update_inode_fsync_trans(handle, inode, need_datasync); |
baaae979 ZY |
5111 | out_error: |
5112 | ext4_std_error(inode->i_sb, err); | |
ac27a0ec | 5113 | out_brelse: |
af5bc92d | 5114 | brelse(bh); |
ac27a0ec DK |
5115 | return err; |
5116 | } | |
5117 | ||
5118 | /* | |
617ba13b | 5119 | * ext4_write_inode() |
ac27a0ec DK |
5120 | * |
5121 | * We are called from a few places: | |
5122 | * | |
87f7e416 | 5123 | * - Within generic_file_aio_write() -> generic_write_sync() for O_SYNC files. |
ac27a0ec | 5124 | * Here, there will be no transaction running. We wait for any running |
4907cb7b | 5125 | * transaction to commit. |
ac27a0ec | 5126 | * |
87f7e416 TT |
5127 | * - Within flush work (sys_sync(), kupdate and such). |
5128 | * We wait on commit, if told to. | |
ac27a0ec | 5129 | * |
87f7e416 TT |
5130 | * - Within iput_final() -> write_inode_now() |
5131 | * We wait on commit, if told to. | |
ac27a0ec DK |
5132 | * |
5133 | * In all cases it is actually safe for us to return without doing anything, | |
5134 | * because the inode has been copied into a raw inode buffer in | |
87f7e416 TT |
5135 | * ext4_mark_inode_dirty(). This is a correctness thing for WB_SYNC_ALL |
5136 | * writeback. | |
ac27a0ec DK |
5137 | * |
5138 | * Note that we are absolutely dependent upon all inode dirtiers doing the | |
5139 | * right thing: they *must* call mark_inode_dirty() after dirtying info in | |
5140 | * which we are interested. | |
5141 | * | |
5142 | * It would be a bug for them to not do this. The code: | |
5143 | * | |
5144 | * mark_inode_dirty(inode) | |
5145 | * stuff(); | |
5146 | * inode->i_size = expr; | |
5147 | * | |
87f7e416 TT |
5148 | * is in error because write_inode() could occur while `stuff()' is running, |
5149 | * and the new i_size will be lost. Plus the inode will no longer be on the | |
5150 | * superblock's dirty inode list. | |
ac27a0ec | 5151 | */ |
a9185b41 | 5152 | int ext4_write_inode(struct inode *inode, struct writeback_control *wbc) |
ac27a0ec | 5153 | { |
91ac6f43 FM |
5154 | int err; |
5155 | ||
f1128084 | 5156 | if (WARN_ON_ONCE(current->flags & PF_MEMALLOC)) |
ac27a0ec DK |
5157 | return 0; |
5158 | ||
eb8ab444 | 5159 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
18f2c4fc TT |
5160 | return -EIO; |
5161 | ||
91ac6f43 FM |
5162 | if (EXT4_SB(inode->i_sb)->s_journal) { |
5163 | if (ext4_journal_current_handle()) { | |
4978c659 | 5164 | ext4_debug("called recursively, non-PF_MEMALLOC!\n"); |
91ac6f43 FM |
5165 | dump_stack(); |
5166 | return -EIO; | |
5167 | } | |
ac27a0ec | 5168 | |
10542c22 JK |
5169 | /* |
5170 | * No need to force transaction in WB_SYNC_NONE mode. Also | |
5171 | * ext4_sync_fs() will force the commit after everything is | |
5172 | * written. | |
5173 | */ | |
5174 | if (wbc->sync_mode != WB_SYNC_ALL || wbc->for_sync) | |
91ac6f43 FM |
5175 | return 0; |
5176 | ||
aa75f4d3 | 5177 | err = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal, |
18f2c4fc | 5178 | EXT4_I(inode)->i_sync_tid); |
91ac6f43 FM |
5179 | } else { |
5180 | struct ext4_iloc iloc; | |
ac27a0ec | 5181 | |
8016e29f | 5182 | err = __ext4_get_inode_loc_noinmem(inode, &iloc); |
91ac6f43 FM |
5183 | if (err) |
5184 | return err; | |
10542c22 JK |
5185 | /* |
5186 | * sync(2) will flush the whole buffer cache. No need to do | |
5187 | * it here separately for each inode. | |
5188 | */ | |
5189 | if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync) | |
830156c7 FM |
5190 | sync_dirty_buffer(iloc.bh); |
5191 | if (buffer_req(iloc.bh) && !buffer_uptodate(iloc.bh)) { | |
54d3adbc TT |
5192 | ext4_error_inode_block(inode, iloc.bh->b_blocknr, EIO, |
5193 | "IO error syncing inode"); | |
830156c7 FM |
5194 | err = -EIO; |
5195 | } | |
fd2dd9fb | 5196 | brelse(iloc.bh); |
91ac6f43 FM |
5197 | } |
5198 | return err; | |
ac27a0ec DK |
5199 | } |
5200 | ||
53e87268 | 5201 | /* |
ccd16945 MWO |
5202 | * In data=journal mode ext4_journalled_invalidate_folio() may fail to invalidate |
5203 | * buffers that are attached to a folio straddling i_size and are undergoing | |
53e87268 JK |
5204 | * commit. In that case we have to wait for commit to finish and try again. |
5205 | */ | |
5206 | static void ext4_wait_for_tail_page_commit(struct inode *inode) | |
5207 | { | |
53e87268 JK |
5208 | unsigned offset; |
5209 | journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; | |
5210 | tid_t commit_tid = 0; | |
5211 | int ret; | |
5212 | ||
09cbfeaf | 5213 | offset = inode->i_size & (PAGE_SIZE - 1); |
53e87268 | 5214 | /* |
ccd16945 MWO |
5215 | * If the folio is fully truncated, we don't need to wait for any commit |
5216 | * (and we even should not as __ext4_journalled_invalidate_folio() may | |
5217 | * strip all buffers from the folio but keep the folio dirty which can then | |
3f079114 | 5218 | * confuse e.g. concurrent ext4_writepages() seeing dirty folio without |
565333a1 | 5219 | * buffers). Also we don't need to wait for any commit if all buffers in |
ccd16945 | 5220 | * the folio remain valid. This is most beneficial for the common case of |
565333a1 | 5221 | * blocksize == PAGESIZE. |
53e87268 | 5222 | */ |
565333a1 | 5223 | if (!offset || offset > (PAGE_SIZE - i_blocksize(inode))) |
53e87268 JK |
5224 | return; |
5225 | while (1) { | |
ccd16945 | 5226 | struct folio *folio = filemap_lock_folio(inode->i_mapping, |
09cbfeaf | 5227 | inode->i_size >> PAGE_SHIFT); |
66dabbb6 | 5228 | if (IS_ERR(folio)) |
53e87268 | 5229 | return; |
ccd16945 MWO |
5230 | ret = __ext4_journalled_invalidate_folio(folio, offset, |
5231 | folio_size(folio) - offset); | |
5232 | folio_unlock(folio); | |
5233 | folio_put(folio); | |
53e87268 JK |
5234 | if (ret != -EBUSY) |
5235 | return; | |
5236 | commit_tid = 0; | |
5237 | read_lock(&journal->j_state_lock); | |
5238 | if (journal->j_committing_transaction) | |
5239 | commit_tid = journal->j_committing_transaction->t_tid; | |
5240 | read_unlock(&journal->j_state_lock); | |
5241 | if (commit_tid) | |
5242 | jbd2_log_wait_commit(journal, commit_tid); | |
5243 | } | |
5244 | } | |
5245 | ||
ac27a0ec | 5246 | /* |
617ba13b | 5247 | * ext4_setattr() |
ac27a0ec DK |
5248 | * |
5249 | * Called from notify_change. | |
5250 | * | |
5251 | * We want to trap VFS attempts to truncate the file as soon as | |
5252 | * possible. In particular, we want to make sure that when the VFS | |
5253 | * shrinks i_size, we put the inode on the orphan list and modify | |
5254 | * i_disksize immediately, so that during the subsequent flushing of | |
5255 | * dirty pages and freeing of disk blocks, we can guarantee that any | |
5256 | * commit will leave the blocks being flushed in an unused state on | |
5257 | * disk. (On recovery, the inode will get truncated and the blocks will | |
5258 | * be freed, so we have a strong guarantee that no future commit will | |
5259 | * leave these blocks visible to the user.) | |
5260 | * | |
678aaf48 JK |
5261 | * Another thing we have to assure is that if we are in ordered mode |
5262 | * and inode is still attached to the committing transaction, we must | |
5263 | * we start writeout of all the dirty pages which are being truncated. | |
5264 | * This way we are sure that all the data written in the previous | |
5265 | * transaction are already on disk (truncate waits for pages under | |
5266 | * writeback). | |
5267 | * | |
f340b3d9 | 5268 | * Called with inode->i_rwsem down. |
ac27a0ec | 5269 | */ |
c1632a0f | 5270 | int ext4_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 5271 | struct iattr *attr) |
ac27a0ec | 5272 | { |
2b0143b5 | 5273 | struct inode *inode = d_inode(dentry); |
ac27a0ec | 5274 | int error, rc = 0; |
3d287de3 | 5275 | int orphan = 0; |
ac27a0ec | 5276 | const unsigned int ia_valid = attr->ia_valid; |
a642c2c0 | 5277 | bool inc_ivers = true; |
ac27a0ec | 5278 | |
eb8ab444 | 5279 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
0db1ff22 TT |
5280 | return -EIO; |
5281 | ||
02b016ca TT |
5282 | if (unlikely(IS_IMMUTABLE(inode))) |
5283 | return -EPERM; | |
5284 | ||
5285 | if (unlikely(IS_APPEND(inode) && | |
5286 | (ia_valid & (ATTR_MODE | ATTR_UID | | |
5287 | ATTR_GID | ATTR_TIMES_SET)))) | |
5288 | return -EPERM; | |
5289 | ||
c1632a0f | 5290 | error = setattr_prepare(idmap, dentry, attr); |
ac27a0ec DK |
5291 | if (error) |
5292 | return error; | |
5293 | ||
3ce2b8dd EB |
5294 | error = fscrypt_prepare_setattr(dentry, attr); |
5295 | if (error) | |
5296 | return error; | |
5297 | ||
c93d8f88 EB |
5298 | error = fsverity_prepare_setattr(dentry, attr); |
5299 | if (error) | |
5300 | return error; | |
5301 | ||
f861646a | 5302 | if (is_quota_modification(idmap, inode, attr)) { |
a7cdadee JK |
5303 | error = dquot_initialize(inode); |
5304 | if (error) | |
5305 | return error; | |
5306 | } | |
2729cfdc | 5307 | |
0dbe12f2 CB |
5308 | if (i_uid_needs_update(idmap, attr, inode) || |
5309 | i_gid_needs_update(idmap, attr, inode)) { | |
ac27a0ec DK |
5310 | handle_t *handle; |
5311 | ||
5312 | /* (user+group)*(old+new) structure, inode write (sb, | |
5313 | * inode block, ? - but truncate inode update has it) */ | |
9924a92a TT |
5314 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
5315 | (EXT4_MAXQUOTAS_INIT_BLOCKS(inode->i_sb) + | |
5316 | EXT4_MAXQUOTAS_DEL_BLOCKS(inode->i_sb)) + 3); | |
ac27a0ec DK |
5317 | if (IS_ERR(handle)) { |
5318 | error = PTR_ERR(handle); | |
5319 | goto err_out; | |
5320 | } | |
7a9ca53a TE |
5321 | |
5322 | /* dquot_transfer() calls back ext4_get_inode_usage() which | |
5323 | * counts xattr inode references. | |
5324 | */ | |
5325 | down_read(&EXT4_I(inode)->xattr_sem); | |
f861646a | 5326 | error = dquot_transfer(idmap, inode, attr); |
7a9ca53a TE |
5327 | up_read(&EXT4_I(inode)->xattr_sem); |
5328 | ||
ac27a0ec | 5329 | if (error) { |
617ba13b | 5330 | ext4_journal_stop(handle); |
ac27a0ec DK |
5331 | return error; |
5332 | } | |
5333 | /* Update corresponding info in inode so that everything is in | |
5334 | * one transaction */ | |
0dbe12f2 CB |
5335 | i_uid_update(idmap, attr, inode); |
5336 | i_gid_update(idmap, attr, inode); | |
617ba13b MC |
5337 | error = ext4_mark_inode_dirty(handle, inode); |
5338 | ext4_journal_stop(handle); | |
512c15ef | 5339 | if (unlikely(error)) { |
4209ae12 | 5340 | return error; |
512c15ef | 5341 | } |
ac27a0ec DK |
5342 | } |
5343 | ||
3da40c7b | 5344 | if (attr->ia_valid & ATTR_SIZE) { |
5208386c | 5345 | handle_t *handle; |
3da40c7b | 5346 | loff_t oldsize = inode->i_size; |
f4534c9f | 5347 | loff_t old_disksize; |
b9c1c267 | 5348 | int shrink = (attr->ia_size < inode->i_size); |
562c72aa | 5349 | |
12e9b892 | 5350 | if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) { |
e2b46574 ES |
5351 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
5352 | ||
aa75f4d3 | 5353 | if (attr->ia_size > sbi->s_bitmap_maxbytes) { |
0c095c7f | 5354 | return -EFBIG; |
aa75f4d3 | 5355 | } |
e2b46574 | 5356 | } |
aa75f4d3 | 5357 | if (!S_ISREG(inode->i_mode)) { |
3da40c7b | 5358 | return -EINVAL; |
aa75f4d3 | 5359 | } |
dff6efc3 | 5360 | |
a642c2c0 JL |
5361 | if (attr->ia_size == inode->i_size) |
5362 | inc_ivers = false; | |
dff6efc3 | 5363 | |
b9c1c267 JK |
5364 | if (shrink) { |
5365 | if (ext4_should_order_data(inode)) { | |
5366 | error = ext4_begin_ordered_truncate(inode, | |
678aaf48 | 5367 | attr->ia_size); |
b9c1c267 JK |
5368 | if (error) |
5369 | goto err_out; | |
5370 | } | |
5371 | /* | |
5372 | * Blocks are going to be removed from the inode. Wait | |
5373 | * for dio in flight. | |
5374 | */ | |
5375 | inode_dio_wait(inode); | |
5376 | } | |
5377 | ||
d4f5258e | 5378 | filemap_invalidate_lock(inode->i_mapping); |
b9c1c267 JK |
5379 | |
5380 | rc = ext4_break_layouts(inode); | |
5381 | if (rc) { | |
d4f5258e | 5382 | filemap_invalidate_unlock(inode->i_mapping); |
aa75f4d3 | 5383 | goto err_out; |
3da40c7b | 5384 | } |
b9c1c267 | 5385 | |
3da40c7b | 5386 | if (attr->ia_size != inode->i_size) { |
5208386c JK |
5387 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 3); |
5388 | if (IS_ERR(handle)) { | |
5389 | error = PTR_ERR(handle); | |
b9c1c267 | 5390 | goto out_mmap_sem; |
5208386c | 5391 | } |
3da40c7b | 5392 | if (ext4_handle_valid(handle) && shrink) { |
5208386c JK |
5393 | error = ext4_orphan_add(handle, inode); |
5394 | orphan = 1; | |
5395 | } | |
911af577 EG |
5396 | /* |
5397 | * Update c/mtime on truncate up, ext4_truncate() will | |
5398 | * update c/mtime in shrink case below | |
5399 | */ | |
1bc33893 | 5400 | if (!shrink) |
b898ab23 JL |
5401 | inode_set_mtime_to_ts(inode, |
5402 | inode_set_ctime_current(inode)); | |
aa75f4d3 HS |
5403 | |
5404 | if (shrink) | |
a80f7fcf | 5405 | ext4_fc_track_range(handle, inode, |
aa75f4d3 HS |
5406 | (attr->ia_size > 0 ? attr->ia_size - 1 : 0) >> |
5407 | inode->i_sb->s_blocksize_bits, | |
9725958b | 5408 | EXT_MAX_BLOCKS - 1); |
aa75f4d3 HS |
5409 | else |
5410 | ext4_fc_track_range( | |
a80f7fcf | 5411 | handle, inode, |
aa75f4d3 HS |
5412 | (oldsize > 0 ? oldsize - 1 : oldsize) >> |
5413 | inode->i_sb->s_blocksize_bits, | |
5414 | (attr->ia_size > 0 ? attr->ia_size - 1 : 0) >> | |
5415 | inode->i_sb->s_blocksize_bits); | |
5416 | ||
90e775b7 | 5417 | down_write(&EXT4_I(inode)->i_data_sem); |
f4534c9f | 5418 | old_disksize = EXT4_I(inode)->i_disksize; |
5208386c JK |
5419 | EXT4_I(inode)->i_disksize = attr->ia_size; |
5420 | rc = ext4_mark_inode_dirty(handle, inode); | |
5421 | if (!error) | |
5422 | error = rc; | |
90e775b7 JK |
5423 | /* |
5424 | * We have to update i_size under i_data_sem together | |
5425 | * with i_disksize to avoid races with writeback code | |
5426 | * running ext4_wb_update_i_disksize(). | |
5427 | */ | |
5428 | if (!error) | |
5429 | i_size_write(inode, attr->ia_size); | |
f4534c9f YB |
5430 | else |
5431 | EXT4_I(inode)->i_disksize = old_disksize; | |
90e775b7 | 5432 | up_write(&EXT4_I(inode)->i_data_sem); |
5208386c | 5433 | ext4_journal_stop(handle); |
b9c1c267 JK |
5434 | if (error) |
5435 | goto out_mmap_sem; | |
5436 | if (!shrink) { | |
5437 | pagecache_isize_extended(inode, oldsize, | |
5438 | inode->i_size); | |
5439 | } else if (ext4_should_journal_data(inode)) { | |
5440 | ext4_wait_for_tail_page_commit(inode); | |
678aaf48 | 5441 | } |
d6320cbf | 5442 | } |
430657b6 | 5443 | |
5208386c JK |
5444 | /* |
5445 | * Truncate pagecache after we've waited for commit | |
5446 | * in data=journal mode to make pages freeable. | |
5447 | */ | |
923ae0ff | 5448 | truncate_pagecache(inode, inode->i_size); |
b9c1c267 JK |
5449 | /* |
5450 | * Call ext4_truncate() even if i_size didn't change to | |
5451 | * truncate possible preallocated blocks. | |
5452 | */ | |
5453 | if (attr->ia_size <= oldsize) { | |
2c98eb5e TT |
5454 | rc = ext4_truncate(inode); |
5455 | if (rc) | |
5456 | error = rc; | |
5457 | } | |
b9c1c267 | 5458 | out_mmap_sem: |
d4f5258e | 5459 | filemap_invalidate_unlock(inode->i_mapping); |
072bd7ea | 5460 | } |
ac27a0ec | 5461 | |
2c98eb5e | 5462 | if (!error) { |
a642c2c0 JL |
5463 | if (inc_ivers) |
5464 | inode_inc_iversion(inode); | |
c1632a0f | 5465 | setattr_copy(idmap, inode, attr); |
1025774c CH |
5466 | mark_inode_dirty(inode); |
5467 | } | |
5468 | ||
5469 | /* | |
5470 | * If the call to ext4_truncate failed to get a transaction handle at | |
5471 | * all, we need to clean up the in-core orphan list manually. | |
5472 | */ | |
3d287de3 | 5473 | if (orphan && inode->i_nlink) |
617ba13b | 5474 | ext4_orphan_del(NULL, inode); |
ac27a0ec | 5475 | |
2c98eb5e | 5476 | if (!error && (ia_valid & ATTR_MODE)) |
13e83a49 | 5477 | rc = posix_acl_chmod(idmap, dentry, inode->i_mode); |
ac27a0ec DK |
5478 | |
5479 | err_out: | |
aa75f4d3 HS |
5480 | if (error) |
5481 | ext4_std_error(inode->i_sb, error); | |
ac27a0ec DK |
5482 | if (!error) |
5483 | error = rc; | |
5484 | return error; | |
5485 | } | |
5486 | ||
8434ef1d EB |
5487 | u32 ext4_dio_alignment(struct inode *inode) |
5488 | { | |
5489 | if (fsverity_active(inode)) | |
5490 | return 0; | |
5491 | if (ext4_should_journal_data(inode)) | |
5492 | return 0; | |
5493 | if (ext4_has_inline_data(inode)) | |
5494 | return 0; | |
5495 | if (IS_ENCRYPTED(inode)) { | |
5496 | if (!fscrypt_dio_supported(inode)) | |
5497 | return 0; | |
5498 | return i_blocksize(inode); | |
5499 | } | |
5500 | return 1; /* use the iomap defaults */ | |
5501 | } | |
5502 | ||
b74d24f7 | 5503 | int ext4_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 5504 | struct kstat *stat, u32 request_mask, unsigned int query_flags) |
3e3398a0 | 5505 | { |
99652ea5 DH |
5506 | struct inode *inode = d_inode(path->dentry); |
5507 | struct ext4_inode *raw_inode; | |
5508 | struct ext4_inode_info *ei = EXT4_I(inode); | |
5509 | unsigned int flags; | |
5510 | ||
d4c5e960 TT |
5511 | if ((request_mask & STATX_BTIME) && |
5512 | EXT4_FITS_IN_INODE(raw_inode, ei, i_crtime)) { | |
99652ea5 DH |
5513 | stat->result_mask |= STATX_BTIME; |
5514 | stat->btime.tv_sec = ei->i_crtime.tv_sec; | |
5515 | stat->btime.tv_nsec = ei->i_crtime.tv_nsec; | |
5516 | } | |
5517 | ||
8434ef1d EB |
5518 | /* |
5519 | * Return the DIO alignment restrictions if requested. We only return | |
5520 | * this information when requested, since on encrypted files it might | |
5521 | * take a fair bit of work to get if the file wasn't opened recently. | |
5522 | */ | |
5523 | if ((request_mask & STATX_DIOALIGN) && S_ISREG(inode->i_mode)) { | |
5524 | u32 dio_align = ext4_dio_alignment(inode); | |
5525 | ||
5526 | stat->result_mask |= STATX_DIOALIGN; | |
5527 | if (dio_align == 1) { | |
5528 | struct block_device *bdev = inode->i_sb->s_bdev; | |
5529 | ||
5530 | /* iomap defaults */ | |
5531 | stat->dio_mem_align = bdev_dma_alignment(bdev) + 1; | |
5532 | stat->dio_offset_align = bdev_logical_block_size(bdev); | |
5533 | } else { | |
5534 | stat->dio_mem_align = dio_align; | |
5535 | stat->dio_offset_align = dio_align; | |
5536 | } | |
5537 | } | |
5538 | ||
99652ea5 DH |
5539 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
5540 | if (flags & EXT4_APPEND_FL) | |
5541 | stat->attributes |= STATX_ATTR_APPEND; | |
5542 | if (flags & EXT4_COMPR_FL) | |
5543 | stat->attributes |= STATX_ATTR_COMPRESSED; | |
5544 | if (flags & EXT4_ENCRYPT_FL) | |
5545 | stat->attributes |= STATX_ATTR_ENCRYPTED; | |
5546 | if (flags & EXT4_IMMUTABLE_FL) | |
5547 | stat->attributes |= STATX_ATTR_IMMUTABLE; | |
5548 | if (flags & EXT4_NODUMP_FL) | |
5549 | stat->attributes |= STATX_ATTR_NODUMP; | |
1f607195 EB |
5550 | if (flags & EXT4_VERITY_FL) |
5551 | stat->attributes |= STATX_ATTR_VERITY; | |
3e3398a0 | 5552 | |
3209f68b DH |
5553 | stat->attributes_mask |= (STATX_ATTR_APPEND | |
5554 | STATX_ATTR_COMPRESSED | | |
5555 | STATX_ATTR_ENCRYPTED | | |
5556 | STATX_ATTR_IMMUTABLE | | |
1f607195 EB |
5557 | STATX_ATTR_NODUMP | |
5558 | STATX_ATTR_VERITY); | |
3209f68b | 5559 | |
0d72b928 | 5560 | generic_fillattr(idmap, request_mask, inode, stat); |
99652ea5 DH |
5561 | return 0; |
5562 | } | |
5563 | ||
b74d24f7 | 5564 | int ext4_file_getattr(struct mnt_idmap *idmap, |
549c7297 | 5565 | const struct path *path, struct kstat *stat, |
99652ea5 DH |
5566 | u32 request_mask, unsigned int query_flags) |
5567 | { | |
5568 | struct inode *inode = d_inode(path->dentry); | |
5569 | u64 delalloc_blocks; | |
5570 | ||
b74d24f7 | 5571 | ext4_getattr(idmap, path, stat, request_mask, query_flags); |
3e3398a0 | 5572 | |
9206c561 AD |
5573 | /* |
5574 | * If there is inline data in the inode, the inode will normally not | |
5575 | * have data blocks allocated (it may have an external xattr block). | |
5576 | * Report at least one sector for such files, so tools like tar, rsync, | |
d67d64f4 | 5577 | * others don't incorrectly think the file is completely sparse. |
9206c561 AD |
5578 | */ |
5579 | if (unlikely(ext4_has_inline_data(inode))) | |
5580 | stat->blocks += (stat->size + 511) >> 9; | |
5581 | ||
3e3398a0 MC |
5582 | /* |
5583 | * We can't update i_blocks if the block allocation is delayed | |
5584 | * otherwise in the case of system crash before the real block | |
5585 | * allocation is done, we will have i_blocks inconsistent with | |
5586 | * on-disk file blocks. | |
5587 | * We always keep i_blocks updated together with real | |
5588 | * allocation. But to not confuse with user, stat | |
5589 | * will return the blocks that include the delayed allocation | |
5590 | * blocks for this file. | |
5591 | */ | |
96607551 | 5592 | delalloc_blocks = EXT4_C2B(EXT4_SB(inode->i_sb), |
9206c561 AD |
5593 | EXT4_I(inode)->i_reserved_data_blocks); |
5594 | stat->blocks += delalloc_blocks << (inode->i_sb->s_blocksize_bits - 9); | |
3e3398a0 MC |
5595 | return 0; |
5596 | } | |
ac27a0ec | 5597 | |
fffb2739 JK |
5598 | static int ext4_index_trans_blocks(struct inode *inode, int lblocks, |
5599 | int pextents) | |
a02908f1 | 5600 | { |
12e9b892 | 5601 | if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) |
fffb2739 JK |
5602 | return ext4_ind_trans_blocks(inode, lblocks); |
5603 | return ext4_ext_index_trans_blocks(inode, pextents); | |
a02908f1 | 5604 | } |
ac51d837 | 5605 | |
ac27a0ec | 5606 | /* |
a02908f1 MC |
5607 | * Account for index blocks, block groups bitmaps and block group |
5608 | * descriptor blocks if modify datablocks and index blocks | |
5609 | * worse case, the indexs blocks spread over different block groups | |
ac27a0ec | 5610 | * |
a02908f1 | 5611 | * If datablocks are discontiguous, they are possible to spread over |
4907cb7b | 5612 | * different block groups too. If they are contiguous, with flexbg, |
a02908f1 | 5613 | * they could still across block group boundary. |
ac27a0ec | 5614 | * |
a02908f1 MC |
5615 | * Also account for superblock, inode, quota and xattr blocks |
5616 | */ | |
dec214d0 | 5617 | static int ext4_meta_trans_blocks(struct inode *inode, int lblocks, |
fffb2739 | 5618 | int pextents) |
a02908f1 | 5619 | { |
8df9675f TT |
5620 | ext4_group_t groups, ngroups = ext4_get_groups_count(inode->i_sb); |
5621 | int gdpblocks; | |
a02908f1 | 5622 | int idxblocks; |
7fc51f92 | 5623 | int ret; |
a02908f1 MC |
5624 | |
5625 | /* | |
fffb2739 JK |
5626 | * How many index blocks need to touch to map @lblocks logical blocks |
5627 | * to @pextents physical extents? | |
a02908f1 | 5628 | */ |
fffb2739 | 5629 | idxblocks = ext4_index_trans_blocks(inode, lblocks, pextents); |
a02908f1 MC |
5630 | |
5631 | ret = idxblocks; | |
5632 | ||
5633 | /* | |
5634 | * Now let's see how many group bitmaps and group descriptors need | |
5635 | * to account | |
5636 | */ | |
fffb2739 | 5637 | groups = idxblocks + pextents; |
a02908f1 | 5638 | gdpblocks = groups; |
8df9675f TT |
5639 | if (groups > ngroups) |
5640 | groups = ngroups; | |
a02908f1 MC |
5641 | if (groups > EXT4_SB(inode->i_sb)->s_gdb_count) |
5642 | gdpblocks = EXT4_SB(inode->i_sb)->s_gdb_count; | |
5643 | ||
5644 | /* bitmaps and block group descriptor blocks */ | |
5645 | ret += groups + gdpblocks; | |
5646 | ||
5647 | /* Blocks for super block, inode, quota and xattr blocks */ | |
5648 | ret += EXT4_META_TRANS_BLOCKS(inode->i_sb); | |
5649 | ||
5650 | return ret; | |
5651 | } | |
5652 | ||
5653 | /* | |
25985edc | 5654 | * Calculate the total number of credits to reserve to fit |
f3bd1f3f MC |
5655 | * the modification of a single pages into a single transaction, |
5656 | * which may include multiple chunks of block allocations. | |
ac27a0ec | 5657 | * |
525f4ed8 | 5658 | * This could be called via ext4_write_begin() |
ac27a0ec | 5659 | * |
525f4ed8 | 5660 | * We need to consider the worse case, when |
a02908f1 | 5661 | * one new block per extent. |
ac27a0ec | 5662 | */ |
a86c6181 | 5663 | int ext4_writepage_trans_blocks(struct inode *inode) |
ac27a0ec | 5664 | { |
617ba13b | 5665 | int bpp = ext4_journal_blocks_per_page(inode); |
ac27a0ec DK |
5666 | int ret; |
5667 | ||
fffb2739 | 5668 | ret = ext4_meta_trans_blocks(inode, bpp, bpp); |
a86c6181 | 5669 | |
a02908f1 | 5670 | /* Account for data blocks for journalled mode */ |
617ba13b | 5671 | if (ext4_should_journal_data(inode)) |
a02908f1 | 5672 | ret += bpp; |
ac27a0ec DK |
5673 | return ret; |
5674 | } | |
f3bd1f3f MC |
5675 | |
5676 | /* | |
5677 | * Calculate the journal credits for a chunk of data modification. | |
5678 | * | |
5679 | * This is called from DIO, fallocate or whoever calling | |
79e83036 | 5680 | * ext4_map_blocks() to map/allocate a chunk of contiguous disk blocks. |
f3bd1f3f MC |
5681 | * |
5682 | * journal buffers for data blocks are not included here, as DIO | |
5683 | * and fallocate do no need to journal data buffers. | |
5684 | */ | |
5685 | int ext4_chunk_trans_blocks(struct inode *inode, int nrblocks) | |
5686 | { | |
5687 | return ext4_meta_trans_blocks(inode, nrblocks, 1); | |
5688 | } | |
5689 | ||
ac27a0ec | 5690 | /* |
617ba13b | 5691 | * The caller must have previously called ext4_reserve_inode_write(). |
ac27a0ec DK |
5692 | * Give this, we know that the caller already has write access to iloc->bh. |
5693 | */ | |
617ba13b | 5694 | int ext4_mark_iloc_dirty(handle_t *handle, |
de9a55b8 | 5695 | struct inode *inode, struct ext4_iloc *iloc) |
ac27a0ec DK |
5696 | { |
5697 | int err = 0; | |
5698 | ||
eb8ab444 | 5699 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) { |
a6758309 | 5700 | put_bh(iloc->bh); |
0db1ff22 | 5701 | return -EIO; |
a6758309 | 5702 | } |
a80f7fcf | 5703 | ext4_fc_track_inode(handle, inode); |
aa75f4d3 | 5704 | |
ac27a0ec DK |
5705 | /* the do_update_inode consumes one bh->b_count */ |
5706 | get_bh(iloc->bh); | |
5707 | ||
dab291af | 5708 | /* ext4_do_update_inode() does jbd2_journal_dirty_metadata */ |
830156c7 | 5709 | err = ext4_do_update_inode(handle, inode, iloc); |
ac27a0ec DK |
5710 | put_bh(iloc->bh); |
5711 | return err; | |
5712 | } | |
5713 | ||
5714 | /* | |
5715 | * On success, We end up with an outstanding reference count against | |
5716 | * iloc->bh. This _must_ be cleaned up later. | |
5717 | */ | |
5718 | ||
5719 | int | |
617ba13b MC |
5720 | ext4_reserve_inode_write(handle_t *handle, struct inode *inode, |
5721 | struct ext4_iloc *iloc) | |
ac27a0ec | 5722 | { |
0390131b FM |
5723 | int err; |
5724 | ||
eb8ab444 | 5725 | if (unlikely(ext4_forced_shutdown(inode->i_sb))) |
0db1ff22 TT |
5726 | return -EIO; |
5727 | ||
0390131b FM |
5728 | err = ext4_get_inode_loc(inode, iloc); |
5729 | if (!err) { | |
5730 | BUFFER_TRACE(iloc->bh, "get_write_access"); | |
188c299e JK |
5731 | err = ext4_journal_get_write_access(handle, inode->i_sb, |
5732 | iloc->bh, EXT4_JTR_NONE); | |
0390131b FM |
5733 | if (err) { |
5734 | brelse(iloc->bh); | |
5735 | iloc->bh = NULL; | |
ac27a0ec DK |
5736 | } |
5737 | } | |
617ba13b | 5738 | ext4_std_error(inode->i_sb, err); |
ac27a0ec DK |
5739 | return err; |
5740 | } | |
5741 | ||
c03b45b8 MX |
5742 | static int __ext4_expand_extra_isize(struct inode *inode, |
5743 | unsigned int new_extra_isize, | |
5744 | struct ext4_iloc *iloc, | |
5745 | handle_t *handle, int *no_expand) | |
5746 | { | |
5747 | struct ext4_inode *raw_inode; | |
5748 | struct ext4_xattr_ibody_header *header; | |
4ea99936 TT |
5749 | unsigned int inode_size = EXT4_INODE_SIZE(inode->i_sb); |
5750 | struct ext4_inode_info *ei = EXT4_I(inode); | |
c03b45b8 MX |
5751 | int error; |
5752 | ||
4ea99936 TT |
5753 | /* this was checked at iget time, but double check for good measure */ |
5754 | if ((EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize > inode_size) || | |
5755 | (ei->i_extra_isize & 3)) { | |
5756 | EXT4_ERROR_INODE(inode, "bad extra_isize %u (inode size %u)", | |
5757 | ei->i_extra_isize, | |
5758 | EXT4_INODE_SIZE(inode->i_sb)); | |
5759 | return -EFSCORRUPTED; | |
5760 | } | |
5761 | if ((new_extra_isize < ei->i_extra_isize) || | |
5762 | (new_extra_isize < 4) || | |
5763 | (new_extra_isize > inode_size - EXT4_GOOD_OLD_INODE_SIZE)) | |
5764 | return -EINVAL; /* Should never happen */ | |
5765 | ||
c03b45b8 MX |
5766 | raw_inode = ext4_raw_inode(iloc); |
5767 | ||
5768 | header = IHDR(inode, raw_inode); | |
5769 | ||
5770 | /* No extended attributes present */ | |
5771 | if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR) || | |
5772 | header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)) { | |
5773 | memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE + | |
5774 | EXT4_I(inode)->i_extra_isize, 0, | |
5775 | new_extra_isize - EXT4_I(inode)->i_extra_isize); | |
5776 | EXT4_I(inode)->i_extra_isize = new_extra_isize; | |
5777 | return 0; | |
5778 | } | |
5779 | ||
8994d113 JK |
5780 | /* |
5781 | * We may need to allocate external xattr block so we need quotas | |
5782 | * initialized. Here we can be called with various locks held so we | |
5783 | * cannot affort to initialize quotas ourselves. So just bail. | |
5784 | */ | |
5785 | if (dquot_initialize_needed(inode)) | |
5786 | return -EAGAIN; | |
5787 | ||
c03b45b8 MX |
5788 | /* try to expand with EAs present */ |
5789 | error = ext4_expand_extra_isize_ea(inode, new_extra_isize, | |
5790 | raw_inode, handle); | |
5791 | if (error) { | |
5792 | /* | |
5793 | * Inode size expansion failed; don't try again | |
5794 | */ | |
5795 | *no_expand = 1; | |
5796 | } | |
5797 | ||
5798 | return error; | |
5799 | } | |
5800 | ||
6dd4ee7c KS |
5801 | /* |
5802 | * Expand an inode by new_extra_isize bytes. | |
5803 | * Returns 0 on success or negative error number on failure. | |
5804 | */ | |
cf0a5e81 MX |
5805 | static int ext4_try_to_expand_extra_isize(struct inode *inode, |
5806 | unsigned int new_extra_isize, | |
5807 | struct ext4_iloc iloc, | |
5808 | handle_t *handle) | |
6dd4ee7c | 5809 | { |
3b10fdc6 MX |
5810 | int no_expand; |
5811 | int error; | |
6dd4ee7c | 5812 | |
cf0a5e81 MX |
5813 | if (ext4_test_inode_state(inode, EXT4_STATE_NO_EXPAND)) |
5814 | return -EOVERFLOW; | |
5815 | ||
5816 | /* | |
5817 | * In nojournal mode, we can immediately attempt to expand | |
5818 | * the inode. When journaled, we first need to obtain extra | |
5819 | * buffer credits since we may write into the EA block | |
5820 | * with this same handle. If journal_extend fails, then it will | |
5821 | * only result in a minor loss of functionality for that inode. | |
5822 | * If this is felt to be critical, then e2fsck should be run to | |
5823 | * force a large enough s_min_extra_isize. | |
5824 | */ | |
6cb367c2 | 5825 | if (ext4_journal_extend(handle, |
83448bdf | 5826 | EXT4_DATA_TRANS_BLOCKS(inode->i_sb), 0) != 0) |
cf0a5e81 | 5827 | return -ENOSPC; |
6dd4ee7c | 5828 | |
3b10fdc6 | 5829 | if (ext4_write_trylock_xattr(inode, &no_expand) == 0) |
cf0a5e81 | 5830 | return -EBUSY; |
3b10fdc6 | 5831 | |
c03b45b8 MX |
5832 | error = __ext4_expand_extra_isize(inode, new_extra_isize, &iloc, |
5833 | handle, &no_expand); | |
5834 | ext4_write_unlock_xattr(inode, &no_expand); | |
6dd4ee7c | 5835 | |
c03b45b8 MX |
5836 | return error; |
5837 | } | |
6dd4ee7c | 5838 | |
c03b45b8 MX |
5839 | int ext4_expand_extra_isize(struct inode *inode, |
5840 | unsigned int new_extra_isize, | |
5841 | struct ext4_iloc *iloc) | |
5842 | { | |
5843 | handle_t *handle; | |
5844 | int no_expand; | |
5845 | int error, rc; | |
5846 | ||
5847 | if (ext4_test_inode_state(inode, EXT4_STATE_NO_EXPAND)) { | |
5848 | brelse(iloc->bh); | |
5849 | return -EOVERFLOW; | |
6dd4ee7c KS |
5850 | } |
5851 | ||
c03b45b8 MX |
5852 | handle = ext4_journal_start(inode, EXT4_HT_INODE, |
5853 | EXT4_DATA_TRANS_BLOCKS(inode->i_sb)); | |
5854 | if (IS_ERR(handle)) { | |
5855 | error = PTR_ERR(handle); | |
5856 | brelse(iloc->bh); | |
5857 | return error; | |
5858 | } | |
5859 | ||
5860 | ext4_write_lock_xattr(inode, &no_expand); | |
5861 | ||
ddccb6db | 5862 | BUFFER_TRACE(iloc->bh, "get_write_access"); |
188c299e JK |
5863 | error = ext4_journal_get_write_access(handle, inode->i_sb, iloc->bh, |
5864 | EXT4_JTR_NONE); | |
3b10fdc6 | 5865 | if (error) { |
c03b45b8 | 5866 | brelse(iloc->bh); |
7f420d64 | 5867 | goto out_unlock; |
3b10fdc6 | 5868 | } |
cf0a5e81 | 5869 | |
c03b45b8 MX |
5870 | error = __ext4_expand_extra_isize(inode, new_extra_isize, iloc, |
5871 | handle, &no_expand); | |
5872 | ||
5873 | rc = ext4_mark_iloc_dirty(handle, inode, iloc); | |
5874 | if (!error) | |
5875 | error = rc; | |
5876 | ||
7f420d64 | 5877 | out_unlock: |
c03b45b8 | 5878 | ext4_write_unlock_xattr(inode, &no_expand); |
c03b45b8 | 5879 | ext4_journal_stop(handle); |
3b10fdc6 | 5880 | return error; |
6dd4ee7c KS |
5881 | } |
5882 | ||
ac27a0ec DK |
5883 | /* |
5884 | * What we do here is to mark the in-core inode as clean with respect to inode | |
5885 | * dirtiness (it may still be data-dirty). | |
5886 | * This means that the in-core inode may be reaped by prune_icache | |
5887 | * without having to perform any I/O. This is a very good thing, | |
5888 | * because *any* task may call prune_icache - even ones which | |
5889 | * have a transaction open against a different journal. | |
5890 | * | |
5891 | * Is this cheating? Not really. Sure, we haven't written the | |
5892 | * inode out, but prune_icache isn't a user-visible syncing function. | |
5893 | * Whenever the user wants stuff synced (sys_sync, sys_msync, sys_fsync) | |
5894 | * we start and wait on commits. | |
ac27a0ec | 5895 | */ |
4209ae12 HS |
5896 | int __ext4_mark_inode_dirty(handle_t *handle, struct inode *inode, |
5897 | const char *func, unsigned int line) | |
ac27a0ec | 5898 | { |
617ba13b | 5899 | struct ext4_iloc iloc; |
6dd4ee7c | 5900 | struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); |
cf0a5e81 | 5901 | int err; |
ac27a0ec DK |
5902 | |
5903 | might_sleep(); | |
7ff9c073 | 5904 | trace_ext4_mark_inode_dirty(inode, _RET_IP_); |
617ba13b | 5905 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
5e1021f2 | 5906 | if (err) |
4209ae12 | 5907 | goto out; |
cf0a5e81 MX |
5908 | |
5909 | if (EXT4_I(inode)->i_extra_isize < sbi->s_want_extra_isize) | |
5910 | ext4_try_to_expand_extra_isize(inode, sbi->s_want_extra_isize, | |
5911 | iloc, handle); | |
5912 | ||
4209ae12 HS |
5913 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
5914 | out: | |
5915 | if (unlikely(err)) | |
5916 | ext4_error_inode_err(inode, func, line, 0, err, | |
5917 | "mark_inode_dirty error"); | |
5918 | return err; | |
ac27a0ec DK |
5919 | } |
5920 | ||
5921 | /* | |
617ba13b | 5922 | * ext4_dirty_inode() is called from __mark_inode_dirty() |
ac27a0ec DK |
5923 | * |
5924 | * We're really interested in the case where a file is being extended. | |
5925 | * i_size has been changed by generic_commit_write() and we thus need | |
5926 | * to include the updated inode in the current transaction. | |
5927 | * | |
5dd4056d | 5928 | * Also, dquot_alloc_block() will always dirty the inode when blocks |
ac27a0ec DK |
5929 | * are allocated to the file. |
5930 | * | |
5931 | * If the inode is marked synchronous, we don't honour that here - doing | |
5932 | * so would cause a commit on atime updates, which we don't bother doing. | |
5933 | * We handle synchronous inodes at the highest possible level. | |
5934 | */ | |
aa385729 | 5935 | void ext4_dirty_inode(struct inode *inode, int flags) |
ac27a0ec | 5936 | { |
ac27a0ec DK |
5937 | handle_t *handle; |
5938 | ||
9924a92a | 5939 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); |
ac27a0ec | 5940 | if (IS_ERR(handle)) |
e2728c56 | 5941 | return; |
f3dc272f | 5942 | ext4_mark_inode_dirty(handle, inode); |
617ba13b | 5943 | ext4_journal_stop(handle); |
ac27a0ec DK |
5944 | } |
5945 | ||
617ba13b | 5946 | int ext4_change_inode_journal_flag(struct inode *inode, int val) |
ac27a0ec DK |
5947 | { |
5948 | journal_t *journal; | |
5949 | handle_t *handle; | |
5950 | int err; | |
00d873c1 | 5951 | int alloc_ctx; |
ac27a0ec DK |
5952 | |
5953 | /* | |
5954 | * We have to be very careful here: changing a data block's | |
5955 | * journaling status dynamically is dangerous. If we write a | |
5956 | * data block to the journal, change the status and then delete | |
5957 | * that block, we risk forgetting to revoke the old log record | |
5958 | * from the journal and so a subsequent replay can corrupt data. | |
5959 | * So, first we make sure that the journal is empty and that | |
5960 | * nobody is changing anything. | |
5961 | */ | |
5962 | ||
617ba13b | 5963 | journal = EXT4_JOURNAL(inode); |
0390131b FM |
5964 | if (!journal) |
5965 | return 0; | |
d699594d | 5966 | if (is_journal_aborted(journal)) |
ac27a0ec DK |
5967 | return -EROFS; |
5968 | ||
17335dcc | 5969 | /* Wait for all existing dio workers */ |
17335dcc DM |
5970 | inode_dio_wait(inode); |
5971 | ||
4c546592 DJ |
5972 | /* |
5973 | * Before flushing the journal and switching inode's aops, we have | |
5974 | * to flush all dirty data the inode has. There can be outstanding | |
5975 | * delayed allocations, there can be unwritten extents created by | |
5976 | * fallocate or buffered writes in dioread_nolock mode covered by | |
5977 | * dirty data which can be converted only after flushing the dirty | |
5978 | * data (and journalled aops don't know how to handle these cases). | |
5979 | */ | |
5980 | if (val) { | |
d4f5258e | 5981 | filemap_invalidate_lock(inode->i_mapping); |
4c546592 DJ |
5982 | err = filemap_write_and_wait(inode->i_mapping); |
5983 | if (err < 0) { | |
d4f5258e | 5984 | filemap_invalidate_unlock(inode->i_mapping); |
4c546592 DJ |
5985 | return err; |
5986 | } | |
5987 | } | |
5988 | ||
00d873c1 | 5989 | alloc_ctx = ext4_writepages_down_write(inode->i_sb); |
dab291af | 5990 | jbd2_journal_lock_updates(journal); |
ac27a0ec DK |
5991 | |
5992 | /* | |
5993 | * OK, there are no updates running now, and all cached data is | |
5994 | * synced to disk. We are now in a completely consistent state | |
5995 | * which doesn't have anything in the journal, and we know that | |
5996 | * no filesystem updates are running, so it is safe to modify | |
5997 | * the inode's in-core data-journaling state flag now. | |
5998 | */ | |
5999 | ||
6000 | if (val) | |
12e9b892 | 6001 | ext4_set_inode_flag(inode, EXT4_INODE_JOURNAL_DATA); |
5872ddaa | 6002 | else { |
01d5d965 | 6003 | err = jbd2_journal_flush(journal, 0); |
4f879ca6 JK |
6004 | if (err < 0) { |
6005 | jbd2_journal_unlock_updates(journal); | |
00d873c1 | 6006 | ext4_writepages_up_write(inode->i_sb, alloc_ctx); |
4f879ca6 JK |
6007 | return err; |
6008 | } | |
12e9b892 | 6009 | ext4_clear_inode_flag(inode, EXT4_INODE_JOURNAL_DATA); |
5872ddaa | 6010 | } |
617ba13b | 6011 | ext4_set_aops(inode); |
ac27a0ec | 6012 | |
dab291af | 6013 | jbd2_journal_unlock_updates(journal); |
00d873c1 | 6014 | ext4_writepages_up_write(inode->i_sb, alloc_ctx); |
c8585c6f | 6015 | |
4c546592 | 6016 | if (val) |
d4f5258e | 6017 | filemap_invalidate_unlock(inode->i_mapping); |
ac27a0ec DK |
6018 | |
6019 | /* Finally we can mark the inode as dirty. */ | |
6020 | ||
9924a92a | 6021 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
ac27a0ec DK |
6022 | if (IS_ERR(handle)) |
6023 | return PTR_ERR(handle); | |
6024 | ||
aa75f4d3 | 6025 | ext4_fc_mark_ineligible(inode->i_sb, |
e85c81ba | 6026 | EXT4_FC_REASON_JOURNAL_FLAG_CHANGE, handle); |
617ba13b | 6027 | err = ext4_mark_inode_dirty(handle, inode); |
0390131b | 6028 | ext4_handle_sync(handle); |
617ba13b MC |
6029 | ext4_journal_stop(handle); |
6030 | ext4_std_error(inode->i_sb, err); | |
ac27a0ec DK |
6031 | |
6032 | return err; | |
6033 | } | |
2e9ee850 | 6034 | |
188c299e JK |
6035 | static int ext4_bh_unmapped(handle_t *handle, struct inode *inode, |
6036 | struct buffer_head *bh) | |
2e9ee850 AK |
6037 | { |
6038 | return !buffer_mapped(bh); | |
6039 | } | |
6040 | ||
401b25aa | 6041 | vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf) |
2e9ee850 | 6042 | { |
11bac800 | 6043 | struct vm_area_struct *vma = vmf->vma; |
9ea0e45b | 6044 | struct folio *folio = page_folio(vmf->page); |
2e9ee850 AK |
6045 | loff_t size; |
6046 | unsigned long len; | |
401b25aa SJ |
6047 | int err; |
6048 | vm_fault_t ret; | |
2e9ee850 | 6049 | struct file *file = vma->vm_file; |
496ad9aa | 6050 | struct inode *inode = file_inode(file); |
2e9ee850 | 6051 | struct address_space *mapping = inode->i_mapping; |
9ea7df53 JK |
6052 | handle_t *handle; |
6053 | get_block_t *get_block; | |
6054 | int retries = 0; | |
2e9ee850 | 6055 | |
02b016ca TT |
6056 | if (unlikely(IS_IMMUTABLE(inode))) |
6057 | return VM_FAULT_SIGBUS; | |
6058 | ||
8e8ad8a5 | 6059 | sb_start_pagefault(inode->i_sb); |
041bbb6d | 6060 | file_update_time(vma->vm_file); |
ea3d7209 | 6061 | |
d4f5258e | 6062 | filemap_invalidate_lock_shared(mapping); |
7b4cc978 | 6063 | |
401b25aa SJ |
6064 | err = ext4_convert_inline_data(inode); |
6065 | if (err) | |
7b4cc978 EB |
6066 | goto out_ret; |
6067 | ||
64a9f144 MFO |
6068 | /* |
6069 | * On data journalling we skip straight to the transaction handle: | |
6070 | * there's no delalloc; page truncated will be checked later; the | |
6071 | * early return w/ all buffers mapped (calculates size/len) can't | |
6072 | * be used; and there's no dioread_nolock, so only ext4_get_block. | |
6073 | */ | |
6074 | if (ext4_should_journal_data(inode)) | |
6075 | goto retry_alloc; | |
6076 | ||
9ea7df53 JK |
6077 | /* Delalloc case is easy... */ |
6078 | if (test_opt(inode->i_sb, DELALLOC) && | |
9ea7df53 JK |
6079 | !ext4_nonda_switch(inode->i_sb)) { |
6080 | do { | |
401b25aa | 6081 | err = block_page_mkwrite(vma, vmf, |
9ea7df53 | 6082 | ext4_da_get_block_prep); |
401b25aa | 6083 | } while (err == -ENOSPC && |
9ea7df53 JK |
6084 | ext4_should_retry_alloc(inode->i_sb, &retries)); |
6085 | goto out_ret; | |
2e9ee850 | 6086 | } |
0e499890 | 6087 | |
9ea0e45b | 6088 | folio_lock(folio); |
9ea7df53 JK |
6089 | size = i_size_read(inode); |
6090 | /* Page got truncated from under us? */ | |
9ea0e45b MW |
6091 | if (folio->mapping != mapping || folio_pos(folio) > size) { |
6092 | folio_unlock(folio); | |
9ea7df53 JK |
6093 | ret = VM_FAULT_NOPAGE; |
6094 | goto out; | |
0e499890 | 6095 | } |
2e9ee850 | 6096 | |
9ea0e45b MW |
6097 | len = folio_size(folio); |
6098 | if (folio_pos(folio) + len > size) | |
6099 | len = size - folio_pos(folio); | |
a827eaff | 6100 | /* |
9ea7df53 JK |
6101 | * Return if we have all the buffers mapped. This avoids the need to do |
6102 | * journal_start/journal_stop which can block and take a long time | |
64a9f144 MFO |
6103 | * |
6104 | * This cannot be done for data journalling, as we have to add the | |
6105 | * inode to the transaction's list to writeprotect pages on commit. | |
a827eaff | 6106 | */ |
9ea0e45b MW |
6107 | if (folio_buffers(folio)) { |
6108 | if (!ext4_walk_page_buffers(NULL, inode, folio_buffers(folio), | |
f19d5870 TM |
6109 | 0, len, NULL, |
6110 | ext4_bh_unmapped)) { | |
9ea7df53 | 6111 | /* Wait so that we don't change page under IO */ |
9ea0e45b | 6112 | folio_wait_stable(folio); |
9ea7df53 JK |
6113 | ret = VM_FAULT_LOCKED; |
6114 | goto out; | |
a827eaff | 6115 | } |
2e9ee850 | 6116 | } |
9ea0e45b | 6117 | folio_unlock(folio); |
9ea7df53 JK |
6118 | /* OK, we need to fill the hole... */ |
6119 | if (ext4_should_dioread_nolock(inode)) | |
705965bd | 6120 | get_block = ext4_get_block_unwritten; |
9ea7df53 JK |
6121 | else |
6122 | get_block = ext4_get_block; | |
6123 | retry_alloc: | |
9924a92a TT |
6124 | handle = ext4_journal_start(inode, EXT4_HT_WRITE_PAGE, |
6125 | ext4_writepage_trans_blocks(inode)); | |
9ea7df53 | 6126 | if (IS_ERR(handle)) { |
c2ec175c | 6127 | ret = VM_FAULT_SIGBUS; |
9ea7df53 JK |
6128 | goto out; |
6129 | } | |
64a9f144 MFO |
6130 | /* |
6131 | * Data journalling can't use block_page_mkwrite() because it | |
6132 | * will set_buffer_dirty() before do_journal_get_write_access() | |
6133 | * thus might hit warning messages for dirty metadata buffers. | |
6134 | */ | |
6135 | if (!ext4_should_journal_data(inode)) { | |
6136 | err = block_page_mkwrite(vma, vmf, get_block); | |
6137 | } else { | |
9ea0e45b | 6138 | folio_lock(folio); |
64a9f144 MFO |
6139 | size = i_size_read(inode); |
6140 | /* Page got truncated from under us? */ | |
9ea0e45b | 6141 | if (folio->mapping != mapping || folio_pos(folio) > size) { |
64a9f144 | 6142 | ret = VM_FAULT_NOPAGE; |
afb585a9 | 6143 | goto out_error; |
9ea7df53 | 6144 | } |
64a9f144 | 6145 | |
9ea0e45b MW |
6146 | len = folio_size(folio); |
6147 | if (folio_pos(folio) + len > size) | |
6148 | len = size - folio_pos(folio); | |
64a9f144 | 6149 | |
9ea0e45b | 6150 | err = __block_write_begin(&folio->page, 0, len, ext4_get_block); |
64a9f144 | 6151 | if (!err) { |
afb585a9 | 6152 | ret = VM_FAULT_SIGBUS; |
80be8c5c | 6153 | if (ext4_journal_folio_buffers(handle, folio, len)) |
afb585a9 | 6154 | goto out_error; |
64a9f144 | 6155 | } else { |
9ea0e45b | 6156 | folio_unlock(folio); |
64a9f144 | 6157 | } |
9ea7df53 JK |
6158 | } |
6159 | ext4_journal_stop(handle); | |
401b25aa | 6160 | if (err == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) |
9ea7df53 JK |
6161 | goto retry_alloc; |
6162 | out_ret: | |
2ba39cc4 | 6163 | ret = vmf_fs_error(err); |
9ea7df53 | 6164 | out: |
d4f5258e | 6165 | filemap_invalidate_unlock_shared(mapping); |
8e8ad8a5 | 6166 | sb_end_pagefault(inode->i_sb); |
2e9ee850 | 6167 | return ret; |
afb585a9 | 6168 | out_error: |
9ea0e45b | 6169 | folio_unlock(folio); |
afb585a9 MFO |
6170 | ext4_journal_stop(handle); |
6171 | goto out; | |
2e9ee850 | 6172 | } |