1// SPDX-License-Identifier: GPL-2.0
2/*
3 * fs/f2fs/inode.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/buffer_head.h>
11#include <linux/writeback.h>
12#include <linux/sched/mm.h>
13#include <linux/lz4.h>
14#include <linux/zstd.h>
15
16#include "f2fs.h"
17#include "node.h"
18#include "segment.h"
19#include "xattr.h"
20
21#include <trace/events/f2fs.h>
22
23#ifdef CONFIG_F2FS_FS_COMPRESSION
24extern const struct address_space_operations f2fs_compress_aops;
25#endif
26
27void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
28{
29 if (is_inode_flag_set(inode, flag: FI_NEW_INODE))
30 return;
31
32 if (f2fs_inode_dirtied(inode, sync))
33 return;
34
35 mark_inode_dirty_sync(inode);
36}
37
38void f2fs_set_inode_flags(struct inode *inode)
39{
40 unsigned int flags = F2FS_I(inode)->i_flags;
41 unsigned int new_fl = 0;
42
43 if (flags & F2FS_SYNC_FL)
44 new_fl |= S_SYNC;
45 if (flags & F2FS_APPEND_FL)
46 new_fl |= S_APPEND;
47 if (flags & F2FS_IMMUTABLE_FL)
48 new_fl |= S_IMMUTABLE;
49 if (flags & F2FS_NOATIME_FL)
50 new_fl |= S_NOATIME;
51 if (flags & F2FS_DIRSYNC_FL)
52 new_fl |= S_DIRSYNC;
53 if (file_is_encrypt(inode))
54 new_fl |= S_ENCRYPTED;
55 if (file_is_verity(inode))
56 new_fl |= S_VERITY;
57 if (flags & F2FS_CASEFOLD_FL)
58 new_fl |= S_CASEFOLD;
59 inode_set_flags(inode, flags: new_fl,
60 S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
61 S_ENCRYPTED|S_VERITY|S_CASEFOLD);
62}
63
64static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
65{
66 int extra_size = get_extra_isize(inode);
67
68 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
69 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
70 if (ri->i_addr[extra_size])
71 inode->i_rdev = old_decode_dev(
72 le32_to_cpu(ri->i_addr[extra_size]));
73 else
74 inode->i_rdev = new_decode_dev(
75 le32_to_cpu(ri->i_addr[extra_size + 1]));
76 }
77}
78
79static int __written_first_block(struct f2fs_sb_info *sbi,
80 struct f2fs_inode *ri)
81{
82 block_t addr = le32_to_cpu(ri->i_addr[offset_in_addr(ri)]);
83
84 if (!__is_valid_data_blkaddr(blkaddr: addr))
85 return 1;
86 if (!f2fs_is_valid_blkaddr(sbi, blkaddr: addr, type: DATA_GENERIC_ENHANCE)) {
87 f2fs_handle_error(sbi, error: ERROR_INVALID_BLKADDR);
88 return -EFSCORRUPTED;
89 }
90 return 0;
91}
92
93static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
94{
95 int extra_size = get_extra_isize(inode);
96
97 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
98 if (old_valid_dev(dev: inode->i_rdev)) {
99 ri->i_addr[extra_size] =
100 cpu_to_le32(old_encode_dev(inode->i_rdev));
101 ri->i_addr[extra_size + 1] = 0;
102 } else {
103 ri->i_addr[extra_size] = 0;
104 ri->i_addr[extra_size + 1] =
105 cpu_to_le32(new_encode_dev(inode->i_rdev));
106 ri->i_addr[extra_size + 2] = 0;
107 }
108 }
109}
110
111static void __recover_inline_status(struct inode *inode, struct page *ipage)
112{
113 void *inline_data = inline_data_addr(inode, page: ipage);
114 __le32 *start = inline_data;
115 __le32 *end = start + MAX_INLINE_DATA(inode) / sizeof(__le32);
116
117 while (start < end) {
118 if (*start++) {
119 f2fs_wait_on_page_writeback(page: ipage, type: NODE, ordered: true, locked: true);
120
121 set_inode_flag(inode, flag: FI_DATA_EXIST);
122 set_raw_inline(inode, ri: F2FS_INODE(page: ipage));
123 set_page_dirty(ipage);
124 return;
125 }
126 }
127 return;
128}
129
130static bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
131{
132 struct f2fs_inode *ri = &F2FS_NODE(page)->i;
133
134 if (!f2fs_sb_has_inode_chksum(sbi))
135 return false;
136
137 if (!IS_INODE(page) || !(ri->i_inline & F2FS_EXTRA_ATTR))
138 return false;
139
140 if (!F2FS_FITS_IN_INODE(ri, le16_to_cpu(ri->i_extra_isize),
141 i_inode_checksum))
142 return false;
143
144 return true;
145}
146
147static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
148{
149 struct f2fs_node *node = F2FS_NODE(page);
150 struct f2fs_inode *ri = &node->i;
151 __le32 ino = node->footer.ino;
152 __le32 gen = ri->i_generation;
153 __u32 chksum, chksum_seed;
154 __u32 dummy_cs = 0;
155 unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
156 unsigned int cs_size = sizeof(dummy_cs);
157
158 chksum = f2fs_chksum(sbi, crc: sbi->s_chksum_seed, address: (__u8 *)&ino,
159 length: sizeof(ino));
160 chksum_seed = f2fs_chksum(sbi, crc: chksum, address: (__u8 *)&gen, length: sizeof(gen));
161
162 chksum = f2fs_chksum(sbi, crc: chksum_seed, address: (__u8 *)ri, length: offset);
163 chksum = f2fs_chksum(sbi, crc: chksum, address: (__u8 *)&dummy_cs, length: cs_size);
164 offset += cs_size;
165 chksum = f2fs_chksum(sbi, crc: chksum, address: (__u8 *)ri + offset,
166 F2FS_BLKSIZE - offset);
167 return chksum;
168}
169
170bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
171{
172 struct f2fs_inode *ri;
173 __u32 provided, calculated;
174
175 if (unlikely(is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN)))
176 return true;
177
178#ifdef CONFIG_F2FS_CHECK_FS
179 if (!f2fs_enable_inode_chksum(sbi, page))
180#else
181 if (!f2fs_enable_inode_chksum(sbi, page) ||
182 PageDirty(page) || PageWriteback(page))
183#endif
184 return true;
185
186 ri = &F2FS_NODE(page)->i;
187 provided = le32_to_cpu(ri->i_inode_checksum);
188 calculated = f2fs_inode_chksum(sbi, page);
189
190 if (provided != calculated)
191 f2fs_warn(sbi, "checksum invalid, nid = %lu, ino_of_node = %x, %x vs. %x",
192 page->index, ino_of_node(page), provided, calculated);
193
194 return provided == calculated;
195}
196
197void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
198{
199 struct f2fs_inode *ri = &F2FS_NODE(page)->i;
200
201 if (!f2fs_enable_inode_chksum(sbi, page))
202 return;
203
204 ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
205}
206
207static bool sanity_check_compress_inode(struct inode *inode,
208 struct f2fs_inode *ri)
209{
210 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
211 unsigned char clevel;
212
213 if (ri->i_compress_algorithm >= COMPRESS_MAX) {
214 f2fs_warn(sbi,
215 "%s: inode (ino=%lx) has unsupported compress algorithm: %u, run fsck to fix",
216 __func__, inode->i_ino, ri->i_compress_algorithm);
217 return false;
218 }
219 if (le64_to_cpu(ri->i_compr_blocks) >
220 SECTOR_TO_BLOCK(inode->i_blocks)) {
221 f2fs_warn(sbi,
222 "%s: inode (ino=%lx) has inconsistent i_compr_blocks:%llu, i_blocks:%llu, run fsck to fix",
223 __func__, inode->i_ino, le64_to_cpu(ri->i_compr_blocks),
224 SECTOR_TO_BLOCK(inode->i_blocks));
225 return false;
226 }
227 if (ri->i_log_cluster_size < MIN_COMPRESS_LOG_SIZE ||
228 ri->i_log_cluster_size > MAX_COMPRESS_LOG_SIZE) {
229 f2fs_warn(sbi,
230 "%s: inode (ino=%lx) has unsupported log cluster size: %u, run fsck to fix",
231 __func__, inode->i_ino, ri->i_log_cluster_size);
232 return false;
233 }
234
235 clevel = le16_to_cpu(ri->i_compress_flag) >>
236 COMPRESS_LEVEL_OFFSET;
237 switch (ri->i_compress_algorithm) {
238 case COMPRESS_LZO:
239#ifdef CONFIG_F2FS_FS_LZO
240 if (clevel)
241 goto err_level;
242#endif
243 break;
244 case COMPRESS_LZORLE:
245#ifdef CONFIG_F2FS_FS_LZORLE
246 if (clevel)
247 goto err_level;
248#endif
249 break;
250 case COMPRESS_LZ4:
251#ifdef CONFIG_F2FS_FS_LZ4
252#ifdef CONFIG_F2FS_FS_LZ4HC
253 if (clevel &&
254 (clevel < LZ4HC_MIN_CLEVEL || clevel > LZ4HC_MAX_CLEVEL))
255 goto err_level;
256#else
257 if (clevel)
258 goto err_level;
259#endif
260#endif
261 break;
262 case COMPRESS_ZSTD:
263#ifdef CONFIG_F2FS_FS_ZSTD
264 if (clevel < zstd_min_clevel() || clevel > zstd_max_clevel())
265 goto err_level;
266#endif
267 break;
268 default:
269 goto err_level;
270 }
271
272 return true;
273err_level:
274 f2fs_warn(sbi, "%s: inode (ino=%lx) has unsupported compress level: %u, run fsck to fix",
275 __func__, inode->i_ino, clevel);
276 return false;
277}
278
279static bool sanity_check_inode(struct inode *inode, struct page *node_page)
280{
281 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
282 struct f2fs_inode_info *fi = F2FS_I(inode);
283 struct f2fs_inode *ri = F2FS_INODE(page: node_page);
284 unsigned long long iblocks;
285
286 iblocks = le64_to_cpu(F2FS_INODE(node_page)->i_blocks);
287 if (!iblocks) {
288 f2fs_warn(sbi, "%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, run fsck to fix.",
289 __func__, inode->i_ino, iblocks);
290 return false;
291 }
292
293 if (ino_of_node(node_page) != nid_of_node(node_page)) {
294 f2fs_warn(sbi, "%s: corrupted inode footer i_ino=%lx, ino,nid: [%u, %u] run fsck to fix.",
295 __func__, inode->i_ino,
296 ino_of_node(node_page), nid_of_node(node_page));
297 return false;
298 }
299
300 if (f2fs_has_extra_attr(inode)) {
301 if (!f2fs_sb_has_extra_attr(sbi)) {
302 f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
303 __func__, inode->i_ino);
304 return false;
305 }
306 if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
307 fi->i_extra_isize < F2FS_MIN_EXTRA_ATTR_SIZE ||
308 fi->i_extra_isize % sizeof(__le32)) {
309 f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
310 __func__, inode->i_ino, fi->i_extra_isize,
311 F2FS_TOTAL_EXTRA_ATTR_SIZE);
312 return false;
313 }
314 if (f2fs_sb_has_flexible_inline_xattr(sbi) &&
315 f2fs_has_inline_xattr(inode) &&
316 (!fi->i_inline_xattr_size ||
317 fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
318 f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %lu",
319 __func__, inode->i_ino, fi->i_inline_xattr_size,
320 MAX_INLINE_XATTR_SIZE);
321 return false;
322 }
323 if (f2fs_sb_has_compression(sbi) &&
324 fi->i_flags & F2FS_COMPR_FL &&
325 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
326 i_compress_flag)) {
327 if (!sanity_check_compress_inode(inode, ri))
328 return false;
329 }
330 } else if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
331 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
332 __func__, inode->i_ino);
333 return false;
334 }
335
336 if (!f2fs_sb_has_extra_attr(sbi)) {
337 if (f2fs_sb_has_project_quota(sbi)) {
338 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
339 __func__, inode->i_ino, F2FS_FEATURE_PRJQUOTA);
340 return false;
341 }
342 if (f2fs_sb_has_inode_chksum(sbi)) {
343 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
344 __func__, inode->i_ino, F2FS_FEATURE_INODE_CHKSUM);
345 return false;
346 }
347 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
348 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
349 __func__, inode->i_ino, F2FS_FEATURE_FLEXIBLE_INLINE_XATTR);
350 return false;
351 }
352 if (f2fs_sb_has_inode_crtime(sbi)) {
353 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
354 __func__, inode->i_ino, F2FS_FEATURE_INODE_CRTIME);
355 return false;
356 }
357 if (f2fs_sb_has_compression(sbi)) {
358 f2fs_warn(sbi, "%s: corrupted inode ino=%lx, wrong feature flag: %u, run fsck to fix.",
359 __func__, inode->i_ino, F2FS_FEATURE_COMPRESSION);
360 return false;
361 }
362 }
363
364 if (f2fs_sanity_check_inline_data(inode)) {
365 f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix",
366 __func__, inode->i_ino, inode->i_mode);
367 return false;
368 }
369
370 if (f2fs_has_inline_dentry(inode) && !S_ISDIR(inode->i_mode)) {
371 f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_dentry, run fsck to fix",
372 __func__, inode->i_ino, inode->i_mode);
373 return false;
374 }
375
376 if ((fi->i_flags & F2FS_CASEFOLD_FL) && !f2fs_sb_has_casefold(sbi)) {
377 f2fs_warn(sbi, "%s: inode (ino=%lx) has casefold flag, but casefold feature is off",
378 __func__, inode->i_ino);
379 return false;
380 }
381
382 return true;
383}
384
385static void init_idisk_time(struct inode *inode)
386{
387 struct f2fs_inode_info *fi = F2FS_I(inode);
388
389 fi->i_disk_time[0] = inode_get_atime(inode);
390 fi->i_disk_time[1] = inode_get_ctime(inode);
391 fi->i_disk_time[2] = inode_get_mtime(inode);
392}
393
394static int do_read_inode(struct inode *inode)
395{
396 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
397 struct f2fs_inode_info *fi = F2FS_I(inode);
398 struct page *node_page;
399 struct f2fs_inode *ri;
400 projid_t i_projid;
401 int err;
402
403 /* Check if ino is within scope */
404 if (f2fs_check_nid_range(sbi, nid: inode->i_ino))
405 return -EINVAL;
406
407 node_page = f2fs_get_node_page(sbi, nid: inode->i_ino);
408 if (IS_ERR(ptr: node_page))
409 return PTR_ERR(ptr: node_page);
410
411 ri = F2FS_INODE(page: node_page);
412
413 inode->i_mode = le16_to_cpu(ri->i_mode);
414 i_uid_write(inode, le32_to_cpu(ri->i_uid));
415 i_gid_write(inode, le32_to_cpu(ri->i_gid));
416 set_nlink(inode, le32_to_cpu(ri->i_links));
417 inode->i_size = le64_to_cpu(ri->i_size);
418 inode->i_blocks = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
419
420 inode_set_atime(inode, le64_to_cpu(ri->i_atime),
421 le32_to_cpu(ri->i_atime_nsec));
422 inode_set_ctime(inode, le64_to_cpu(ri->i_ctime),
423 le32_to_cpu(ri->i_ctime_nsec));
424 inode_set_mtime(inode, le64_to_cpu(ri->i_mtime),
425 le32_to_cpu(ri->i_mtime_nsec));
426 inode->i_generation = le32_to_cpu(ri->i_generation);
427 if (S_ISDIR(inode->i_mode))
428 fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
429 else if (S_ISREG(inode->i_mode))
430 fi->i_gc_failures[GC_FAILURE_PIN] =
431 le16_to_cpu(ri->i_gc_failures);
432 fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
433 fi->i_flags = le32_to_cpu(ri->i_flags);
434 if (S_ISREG(inode->i_mode))
435 fi->i_flags &= ~F2FS_PROJINHERIT_FL;
436 bitmap_zero(dst: fi->flags, nbits: FI_MAX);
437 fi->i_advise = ri->i_advise;
438 fi->i_pino = le32_to_cpu(ri->i_pino);
439 fi->i_dir_level = ri->i_dir_level;
440
441 get_inline_info(inode, ri);
442
443 fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
444 le16_to_cpu(ri->i_extra_isize) : 0;
445
446 if (f2fs_sb_has_flexible_inline_xattr(sbi)) {
447 fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size);
448 } else if (f2fs_has_inline_xattr(inode) ||
449 f2fs_has_inline_dentry(inode)) {
450 fi->i_inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
451 } else {
452
453 /*
454 * Previous inline data or directory always reserved 200 bytes
455 * in inode layout, even if inline_xattr is disabled. In order
456 * to keep inline_dentry's structure for backward compatibility,
457 * we get the space back only from inline_data.
458 */
459 fi->i_inline_xattr_size = 0;
460 }
461
462 if (!sanity_check_inode(inode, node_page)) {
463 f2fs_put_page(page: node_page, unlock: 1);
464 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
465 f2fs_handle_error(sbi, error: ERROR_CORRUPTED_INODE);
466 return -EFSCORRUPTED;
467 }
468
469 /* check data exist */
470 if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
471 __recover_inline_status(inode, ipage: node_page);
472
473 /* try to recover cold bit for non-dir inode */
474 if (!S_ISDIR(inode->i_mode) && !is_cold_node(node_page)) {
475 f2fs_wait_on_page_writeback(page: node_page, type: NODE, ordered: true, locked: true);
476 set_cold_node(page: node_page, is_dir: false);
477 set_page_dirty(node_page);
478 }
479
480 /* get rdev by using inline_info */
481 __get_inode_rdev(inode, ri);
482
483 if (S_ISREG(inode->i_mode)) {
484 err = __written_first_block(sbi, ri);
485 if (err < 0) {
486 f2fs_put_page(page: node_page, unlock: 1);
487 return err;
488 }
489 if (!err)
490 set_inode_flag(inode, flag: FI_FIRST_BLOCK_WRITTEN);
491 }
492
493 if (!f2fs_need_inode_block_update(sbi, ino: inode->i_ino))
494 fi->last_disk_size = inode->i_size;
495
496 if (fi->i_flags & F2FS_PROJINHERIT_FL)
497 set_inode_flag(inode, flag: FI_PROJ_INHERIT);
498
499 if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi) &&
500 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
501 i_projid = (projid_t)le32_to_cpu(ri->i_projid);
502 else
503 i_projid = F2FS_DEF_PROJID;
504 fi->i_projid = make_kprojid(from: &init_user_ns, projid: i_projid);
505
506 if (f2fs_has_extra_attr(inode) && f2fs_sb_has_inode_crtime(sbi) &&
507 F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
508 fi->i_crtime.tv_sec = le64_to_cpu(ri->i_crtime);
509 fi->i_crtime.tv_nsec = le32_to_cpu(ri->i_crtime_nsec);
510 }
511
512 if (f2fs_has_extra_attr(inode) && f2fs_sb_has_compression(sbi) &&
513 (fi->i_flags & F2FS_COMPR_FL)) {
514 if (F2FS_FITS_IN_INODE(ri, fi->i_extra_isize,
515 i_compress_flag)) {
516 unsigned short compress_flag;
517
518 atomic_set(v: &fi->i_compr_blocks,
519 le64_to_cpu(ri->i_compr_blocks));
520 fi->i_compress_algorithm = ri->i_compress_algorithm;
521 fi->i_log_cluster_size = ri->i_log_cluster_size;
522 compress_flag = le16_to_cpu(ri->i_compress_flag);
523 fi->i_compress_level = compress_flag >>
524 COMPRESS_LEVEL_OFFSET;
525 fi->i_compress_flag = compress_flag &
526 GENMASK(COMPRESS_LEVEL_OFFSET - 1, 0);
527 fi->i_cluster_size = BIT(fi->i_log_cluster_size);
528 set_inode_flag(inode, flag: FI_COMPRESSED_FILE);
529 }
530 }
531
532 init_idisk_time(inode);
533
534 /* Need all the flag bits */
535 f2fs_init_read_extent_tree(inode, ipage: node_page);
536 f2fs_init_age_extent_tree(inode);
537
538 if (!sanity_check_extent_cache(inode)) {
539 f2fs_put_page(page: node_page, unlock: 1);
540 f2fs_handle_error(sbi, error: ERROR_CORRUPTED_INODE);
541 return -EFSCORRUPTED;
542 }
543
544 f2fs_put_page(page: node_page, unlock: 1);
545
546 stat_inc_inline_xattr(inode);
547 stat_inc_inline_inode(inode);
548 stat_inc_inline_dir(inode);
549 stat_inc_compr_inode(inode);
550 stat_add_compr_blocks(inode, atomic_read(&fi->i_compr_blocks));
551
552 return 0;
553}
554
555static bool is_meta_ino(struct f2fs_sb_info *sbi, unsigned int ino)
556{
557 return ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi) ||
558 ino == F2FS_COMPRESS_INO(sbi);
559}
560
561struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
562{
563 struct f2fs_sb_info *sbi = F2FS_SB(sb);
564 struct inode *inode;
565 int ret = 0;
566
567 inode = iget_locked(sb, ino);
568 if (!inode)
569 return ERR_PTR(error: -ENOMEM);
570
571 if (!(inode->i_state & I_NEW)) {
572 if (is_meta_ino(sbi, ino)) {
573 f2fs_err(sbi, "inaccessible inode: %lu, run fsck to repair", ino);
574 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
575 ret = -EFSCORRUPTED;
576 trace_f2fs_iget_exit(inode, ret);
577 iput(inode);
578 f2fs_handle_error(sbi, error: ERROR_CORRUPTED_INODE);
579 return ERR_PTR(error: ret);
580 }
581
582 trace_f2fs_iget(inode);
583 return inode;
584 }
585
586 if (is_meta_ino(sbi, ino))
587 goto make_now;
588
589 ret = do_read_inode(inode);
590 if (ret)
591 goto bad_inode;
592make_now:
593 if (ino == F2FS_NODE_INO(sbi)) {
594 inode->i_mapping->a_ops = &f2fs_node_aops;
595 mapping_set_gfp_mask(m: inode->i_mapping, GFP_NOFS);
596 } else if (ino == F2FS_META_INO(sbi)) {
597 inode->i_mapping->a_ops = &f2fs_meta_aops;
598 mapping_set_gfp_mask(m: inode->i_mapping, GFP_NOFS);
599 } else if (ino == F2FS_COMPRESS_INO(sbi)) {
600#ifdef CONFIG_F2FS_FS_COMPRESSION
601 inode->i_mapping->a_ops = &f2fs_compress_aops;
602 /*
603 * generic_error_remove_page only truncates pages of regular
604 * inode
605 */
606 inode->i_mode |= S_IFREG;
607#endif
608 mapping_set_gfp_mask(m: inode->i_mapping,
609 GFP_NOFS | __GFP_HIGHMEM | __GFP_MOVABLE);
610 } else if (S_ISREG(inode->i_mode)) {
611 inode->i_op = &f2fs_file_inode_operations;
612 inode->i_fop = &f2fs_file_operations;
613 inode->i_mapping->a_ops = &f2fs_dblock_aops;
614 } else if (S_ISDIR(inode->i_mode)) {
615 inode->i_op = &f2fs_dir_inode_operations;
616 inode->i_fop = &f2fs_dir_operations;
617 inode->i_mapping->a_ops = &f2fs_dblock_aops;
618 mapping_set_gfp_mask(m: inode->i_mapping, GFP_NOFS);
619 } else if (S_ISLNK(inode->i_mode)) {
620 if (file_is_encrypt(inode))
621 inode->i_op = &f2fs_encrypted_symlink_inode_operations;
622 else
623 inode->i_op = &f2fs_symlink_inode_operations;
624 inode_nohighmem(inode);
625 inode->i_mapping->a_ops = &f2fs_dblock_aops;
626 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
627 S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
628 inode->i_op = &f2fs_special_inode_operations;
629 init_special_inode(inode, inode->i_mode, inode->i_rdev);
630 } else {
631 ret = -EIO;
632 goto bad_inode;
633 }
634 f2fs_set_inode_flags(inode);
635
636 if (file_should_truncate(inode) &&
637 !is_sbi_flag_set(sbi, type: SBI_POR_DOING)) {
638 ret = f2fs_truncate(inode);
639 if (ret)
640 goto bad_inode;
641 file_dont_truncate(inode);
642 }
643
644 unlock_new_inode(inode);
645 trace_f2fs_iget(inode);
646 return inode;
647
648bad_inode:
649 f2fs_inode_synced(inode);
650 iget_failed(inode);
651 trace_f2fs_iget_exit(inode, ret);
652 return ERR_PTR(error: ret);
653}
654
655struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
656{
657 struct inode *inode;
658retry:
659 inode = f2fs_iget(sb, ino);
660 if (IS_ERR(ptr: inode)) {
661 if (PTR_ERR(ptr: inode) == -ENOMEM) {
662 memalloc_retry_wait(GFP_NOFS);
663 goto retry;
664 }
665 }
666 return inode;
667}
668
669void f2fs_update_inode(struct inode *inode, struct page *node_page)
670{
671 struct f2fs_inode *ri;
672 struct extent_tree *et = F2FS_I(inode)->extent_tree[EX_READ];
673
674 f2fs_wait_on_page_writeback(page: node_page, type: NODE, ordered: true, locked: true);
675 set_page_dirty(node_page);
676
677 f2fs_inode_synced(inode);
678
679 ri = F2FS_INODE(page: node_page);
680
681 ri->i_mode = cpu_to_le16(inode->i_mode);
682 ri->i_advise = F2FS_I(inode)->i_advise;
683 ri->i_uid = cpu_to_le32(i_uid_read(inode));
684 ri->i_gid = cpu_to_le32(i_gid_read(inode));
685 ri->i_links = cpu_to_le32(inode->i_nlink);
686 ri->i_blocks = cpu_to_le64(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
687
688 if (!f2fs_is_atomic_file(inode) ||
689 is_inode_flag_set(inode, flag: FI_ATOMIC_COMMITTED))
690 ri->i_size = cpu_to_le64(i_size_read(inode));
691
692 if (et) {
693 read_lock(&et->lock);
694 set_raw_read_extent(ext: &et->largest, i_ext: &ri->i_ext);
695 read_unlock(&et->lock);
696 } else {
697 memset(&ri->i_ext, 0, sizeof(ri->i_ext));
698 }
699 set_raw_inline(inode, ri);
700
701 ri->i_atime = cpu_to_le64(inode_get_atime_sec(inode));
702 ri->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
703 ri->i_mtime = cpu_to_le64(inode_get_mtime_sec(inode));
704 ri->i_atime_nsec = cpu_to_le32(inode_get_atime_nsec(inode));
705 ri->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
706 ri->i_mtime_nsec = cpu_to_le32(inode_get_mtime_nsec(inode));
707 if (S_ISDIR(inode->i_mode))
708 ri->i_current_depth =
709 cpu_to_le32(F2FS_I(inode)->i_current_depth);
710 else if (S_ISREG(inode->i_mode))
711 ri->i_gc_failures =
712 cpu_to_le16(F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN]);
713 ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
714 ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
715 ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
716 ri->i_generation = cpu_to_le32(inode->i_generation);
717 ri->i_dir_level = F2FS_I(inode)->i_dir_level;
718
719 if (f2fs_has_extra_attr(inode)) {
720 ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
721
722 if (f2fs_sb_has_flexible_inline_xattr(sbi: F2FS_I_SB(inode)))
723 ri->i_inline_xattr_size =
724 cpu_to_le16(F2FS_I(inode)->i_inline_xattr_size);
725
726 if (f2fs_sb_has_project_quota(sbi: F2FS_I_SB(inode)) &&
727 F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
728 i_projid)) {
729 projid_t i_projid;
730
731 i_projid = from_kprojid(to: &init_user_ns,
732 projid: F2FS_I(inode)->i_projid);
733 ri->i_projid = cpu_to_le32(i_projid);
734 }
735
736 if (f2fs_sb_has_inode_crtime(sbi: F2FS_I_SB(inode)) &&
737 F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
738 i_crtime)) {
739 ri->i_crtime =
740 cpu_to_le64(F2FS_I(inode)->i_crtime.tv_sec);
741 ri->i_crtime_nsec =
742 cpu_to_le32(F2FS_I(inode)->i_crtime.tv_nsec);
743 }
744
745 if (f2fs_sb_has_compression(sbi: F2FS_I_SB(inode)) &&
746 F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
747 i_compress_flag)) {
748 unsigned short compress_flag;
749
750 ri->i_compr_blocks =
751 cpu_to_le64(atomic_read(
752 &F2FS_I(inode)->i_compr_blocks));
753 ri->i_compress_algorithm =
754 F2FS_I(inode)->i_compress_algorithm;
755 compress_flag = F2FS_I(inode)->i_compress_flag |
756 F2FS_I(inode)->i_compress_level <<
757 COMPRESS_LEVEL_OFFSET;
758 ri->i_compress_flag = cpu_to_le16(compress_flag);
759 ri->i_log_cluster_size =
760 F2FS_I(inode)->i_log_cluster_size;
761 }
762 }
763
764 __set_inode_rdev(inode, ri);
765
766 /* deleted inode */
767 if (inode->i_nlink == 0)
768 clear_page_private_inline(page: node_page);
769
770 init_idisk_time(inode);
771#ifdef CONFIG_F2FS_CHECK_FS
772 f2fs_inode_chksum_set(sbi: F2FS_I_SB(inode), page: node_page);
773#endif
774}
775
776void f2fs_update_inode_page(struct inode *inode)
777{
778 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
779 struct page *node_page;
780 int count = 0;
781retry:
782 node_page = f2fs_get_node_page(sbi, nid: inode->i_ino);
783 if (IS_ERR(ptr: node_page)) {
784 int err = PTR_ERR(ptr: node_page);
785
786 /* The node block was truncated. */
787 if (err == -ENOENT)
788 return;
789
790 if (err == -ENOMEM || ++count <= DEFAULT_RETRY_IO_COUNT)
791 goto retry;
792 f2fs_stop_checkpoint(sbi, end_io: false, reason: STOP_CP_REASON_UPDATE_INODE);
793 return;
794 }
795 f2fs_update_inode(inode, node_page);
796 f2fs_put_page(page: node_page, unlock: 1);
797}
798
799int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
800{
801 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
802
803 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
804 inode->i_ino == F2FS_META_INO(sbi))
805 return 0;
806
807 /*
808 * atime could be updated without dirtying f2fs inode in lazytime mode
809 */
810 if (f2fs_is_time_consistent(inode) &&
811 !is_inode_flag_set(inode, flag: FI_DIRTY_INODE))
812 return 0;
813
814 if (!f2fs_is_checkpoint_ready(sbi))
815 return -ENOSPC;
816
817 /*
818 * We need to balance fs here to prevent from producing dirty node pages
819 * during the urgent cleaning time when running out of free sections.
820 */
821 f2fs_update_inode_page(inode);
822 if (wbc && wbc->nr_to_write)
823 f2fs_balance_fs(sbi, need: true);
824 return 0;
825}
826
827/*
828 * Called at the last iput() if i_nlink is zero
829 */
830void f2fs_evict_inode(struct inode *inode)
831{
832 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
833 struct f2fs_inode_info *fi = F2FS_I(inode);
834 nid_t xnid = fi->i_xattr_nid;
835 int err = 0;
836
837 f2fs_abort_atomic_write(inode, clean: true);
838
839 if (fi->cow_inode) {
840 clear_inode_flag(inode: fi->cow_inode, flag: FI_COW_FILE);
841 iput(fi->cow_inode);
842 fi->cow_inode = NULL;
843 }
844
845 trace_f2fs_evict_inode(inode);
846 truncate_inode_pages_final(&inode->i_data);
847
848 if ((inode->i_nlink || is_bad_inode(inode)) &&
849 test_opt(sbi, COMPRESS_CACHE) && f2fs_compressed_file(inode))
850 f2fs_invalidate_compress_pages(sbi, ino: inode->i_ino);
851
852 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
853 inode->i_ino == F2FS_META_INO(sbi) ||
854 inode->i_ino == F2FS_COMPRESS_INO(sbi))
855 goto out_clear;
856
857 f2fs_bug_on(sbi, get_dirty_pages(inode));
858 f2fs_remove_dirty_inode(inode);
859
860 f2fs_destroy_extent_tree(inode);
861
862 if (inode->i_nlink || is_bad_inode(inode))
863 goto no_delete;
864
865 err = f2fs_dquot_initialize(inode);
866 if (err) {
867 err = 0;
868 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
869 }
870
871 f2fs_remove_ino_entry(sbi, ino: inode->i_ino, type: APPEND_INO);
872 f2fs_remove_ino_entry(sbi, ino: inode->i_ino, type: UPDATE_INO);
873 f2fs_remove_ino_entry(sbi, ino: inode->i_ino, type: FLUSH_INO);
874
875 if (!is_sbi_flag_set(sbi, type: SBI_IS_FREEZING))
876 sb_start_intwrite(sb: inode->i_sb);
877 set_inode_flag(inode, flag: FI_NO_ALLOC);
878 i_size_write(inode, i_size: 0);
879retry:
880 if (F2FS_HAS_BLOCKS(inode))
881 err = f2fs_truncate(inode);
882
883 if (time_to_inject(sbi, FAULT_EVICT_INODE))
884 err = -EIO;
885
886 if (!err) {
887 f2fs_lock_op(sbi);
888 err = f2fs_remove_inode_page(inode);
889 f2fs_unlock_op(sbi);
890 if (err == -ENOENT) {
891 err = 0;
892
893 /*
894 * in fuzzed image, another node may has the same
895 * block address as inode's, if it was truncated
896 * previously, truncation of inode node will fail.
897 */
898 if (is_inode_flag_set(inode, flag: FI_DIRTY_INODE)) {
899 f2fs_warn(F2FS_I_SB(inode),
900 "f2fs_evict_inode: inconsistent node id, ino:%lu",
901 inode->i_ino);
902 f2fs_inode_synced(inode);
903 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
904 }
905 }
906 }
907
908 /* give more chances, if ENOMEM case */
909 if (err == -ENOMEM) {
910 err = 0;
911 goto retry;
912 }
913
914 if (err) {
915 f2fs_update_inode_page(inode);
916 if (dquot_initialize_needed(inode))
917 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
918 }
919 if (!is_sbi_flag_set(sbi, type: SBI_IS_FREEZING))
920 sb_end_intwrite(sb: inode->i_sb);
921no_delete:
922 dquot_drop(inode);
923
924 stat_dec_inline_xattr(inode);
925 stat_dec_inline_dir(inode);
926 stat_dec_inline_inode(inode);
927 stat_dec_compr_inode(inode);
928 stat_sub_compr_blocks(inode,
929 atomic_read(&fi->i_compr_blocks));
930
931 if (likely(!f2fs_cp_error(sbi) &&
932 !is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
933 f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
934 else
935 f2fs_inode_synced(inode);
936
937 /* for the case f2fs_new_inode() was failed, .i_ino is zero, skip it */
938 if (inode->i_ino)
939 invalidate_mapping_pages(mapping: NODE_MAPPING(sbi), start: inode->i_ino,
940 end: inode->i_ino);
941 if (xnid)
942 invalidate_mapping_pages(mapping: NODE_MAPPING(sbi), start: xnid, end: xnid);
943 if (inode->i_nlink) {
944 if (is_inode_flag_set(inode, flag: FI_APPEND_WRITE))
945 f2fs_add_ino_entry(sbi, ino: inode->i_ino, type: APPEND_INO);
946 if (is_inode_flag_set(inode, flag: FI_UPDATE_WRITE))
947 f2fs_add_ino_entry(sbi, ino: inode->i_ino, type: UPDATE_INO);
948 }
949 if (is_inode_flag_set(inode, flag: FI_FREE_NID)) {
950 f2fs_alloc_nid_failed(sbi, nid: inode->i_ino);
951 clear_inode_flag(inode, flag: FI_FREE_NID);
952 } else {
953 /*
954 * If xattr nid is corrupted, we can reach out error condition,
955 * err & !f2fs_exist_written_data(sbi, inode->i_ino, ORPHAN_INO)).
956 * In that case, f2fs_check_nid_range() is enough to give a clue.
957 */
958 }
959out_clear:
960 fscrypt_put_encryption_info(inode);
961 fsverity_cleanup_inode(inode);
962 clear_inode(inode);
963}
964
965/* caller should call f2fs_lock_op() */
966void f2fs_handle_failed_inode(struct inode *inode)
967{
968 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
969 struct node_info ni;
970 int err;
971
972 /*
973 * clear nlink of inode in order to release resource of inode
974 * immediately.
975 */
976 clear_nlink(inode);
977
978 /*
979 * we must call this to avoid inode being remained as dirty, resulting
980 * in a panic when flushing dirty inodes in gdirty_list.
981 */
982 f2fs_update_inode_page(inode);
983 f2fs_inode_synced(inode);
984
985 /* don't make bad inode, since it becomes a regular file. */
986 unlock_new_inode(inode);
987
988 /*
989 * Note: we should add inode to orphan list before f2fs_unlock_op()
990 * so we can prevent losing this orphan when encoutering checkpoint
991 * and following suddenly power-off.
992 */
993 err = f2fs_get_node_info(sbi, nid: inode->i_ino, ni: &ni, checkpoint_context: false);
994 if (err) {
995 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
996 set_inode_flag(inode, flag: FI_FREE_NID);
997 f2fs_warn(sbi, "May loss orphan inode, run fsck to fix.");
998 goto out;
999 }
1000
1001 if (ni.blk_addr != NULL_ADDR) {
1002 err = f2fs_acquire_orphan_inode(sbi);
1003 if (err) {
1004 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
1005 f2fs_warn(sbi, "Too many orphan inodes, run fsck to fix.");
1006 } else {
1007 f2fs_add_orphan_inode(inode);
1008 }
1009 f2fs_alloc_nid_done(sbi, nid: inode->i_ino);
1010 } else {
1011 set_inode_flag(inode, flag: FI_FREE_NID);
1012 }
1013
1014out:
1015 f2fs_unlock_op(sbi);
1016
1017 /* iput will drop the inode object */
1018 iput(inode);
1019}
1020

source code of linux/fs/f2fs/inode.c