1// SPDX-License-Identifier: GPL-2.0
2/*
3 * fs/f2fs/super.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/fs.h>
11#include <linux/fs_context.h>
12#include <linux/sched/mm.h>
13#include <linux/statfs.h>
14#include <linux/buffer_head.h>
15#include <linux/kthread.h>
16#include <linux/parser.h>
17#include <linux/mount.h>
18#include <linux/seq_file.h>
19#include <linux/proc_fs.h>
20#include <linux/random.h>
21#include <linux/exportfs.h>
22#include <linux/blkdev.h>
23#include <linux/quotaops.h>
24#include <linux/f2fs_fs.h>
25#include <linux/sysfs.h>
26#include <linux/quota.h>
27#include <linux/unicode.h>
28#include <linux/part_stat.h>
29#include <linux/zstd.h>
30#include <linux/lz4.h>
31
32#include "f2fs.h"
33#include "node.h"
34#include "segment.h"
35#include "xattr.h"
36#include "gc.h"
37#include "iostat.h"
38
39#define CREATE_TRACE_POINTS
40#include <trace/events/f2fs.h>
41
42static struct kmem_cache *f2fs_inode_cachep;
43
44#ifdef CONFIG_F2FS_FAULT_INJECTION
45
46const char *f2fs_fault_name[FAULT_MAX] = {
47 [FAULT_KMALLOC] = "kmalloc",
48 [FAULT_KVMALLOC] = "kvmalloc",
49 [FAULT_PAGE_ALLOC] = "page alloc",
50 [FAULT_PAGE_GET] = "page get",
51 [FAULT_ALLOC_NID] = "alloc nid",
52 [FAULT_ORPHAN] = "orphan",
53 [FAULT_BLOCK] = "no more block",
54 [FAULT_DIR_DEPTH] = "too big dir depth",
55 [FAULT_EVICT_INODE] = "evict_inode fail",
56 [FAULT_TRUNCATE] = "truncate fail",
57 [FAULT_READ_IO] = "read IO error",
58 [FAULT_CHECKPOINT] = "checkpoint error",
59 [FAULT_DISCARD] = "discard error",
60 [FAULT_WRITE_IO] = "write IO error",
61 [FAULT_SLAB_ALLOC] = "slab alloc",
62 [FAULT_DQUOT_INIT] = "dquot initialize",
63 [FAULT_LOCK_OP] = "lock_op",
64 [FAULT_BLKADDR] = "invalid blkaddr",
65};
66
67void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
68 unsigned int type)
69{
70 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
71
72 if (rate) {
73 atomic_set(v: &ffi->inject_ops, i: 0);
74 ffi->inject_rate = rate;
75 }
76
77 if (type)
78 ffi->inject_type = type;
79
80 if (!rate && !type)
81 memset(ffi, 0, sizeof(struct f2fs_fault_info));
82}
83#endif
84
85/* f2fs-wide shrinker description */
86static struct shrinker *f2fs_shrinker_info;
87
88static int __init f2fs_init_shrinker(void)
89{
90 f2fs_shrinker_info = shrinker_alloc(flags: 0, fmt: "f2fs-shrinker");
91 if (!f2fs_shrinker_info)
92 return -ENOMEM;
93
94 f2fs_shrinker_info->count_objects = f2fs_shrink_count;
95 f2fs_shrinker_info->scan_objects = f2fs_shrink_scan;
96
97 shrinker_register(shrinker: f2fs_shrinker_info);
98
99 return 0;
100}
101
102static void f2fs_exit_shrinker(void)
103{
104 shrinker_free(shrinker: f2fs_shrinker_info);
105}
106
107enum {
108 Opt_gc_background,
109 Opt_disable_roll_forward,
110 Opt_norecovery,
111 Opt_discard,
112 Opt_nodiscard,
113 Opt_noheap,
114 Opt_heap,
115 Opt_user_xattr,
116 Opt_nouser_xattr,
117 Opt_acl,
118 Opt_noacl,
119 Opt_active_logs,
120 Opt_disable_ext_identify,
121 Opt_inline_xattr,
122 Opt_noinline_xattr,
123 Opt_inline_xattr_size,
124 Opt_inline_data,
125 Opt_inline_dentry,
126 Opt_noinline_dentry,
127 Opt_flush_merge,
128 Opt_noflush_merge,
129 Opt_barrier,
130 Opt_nobarrier,
131 Opt_fastboot,
132 Opt_extent_cache,
133 Opt_noextent_cache,
134 Opt_noinline_data,
135 Opt_data_flush,
136 Opt_reserve_root,
137 Opt_resgid,
138 Opt_resuid,
139 Opt_mode,
140 Opt_io_size_bits,
141 Opt_fault_injection,
142 Opt_fault_type,
143 Opt_lazytime,
144 Opt_nolazytime,
145 Opt_quota,
146 Opt_noquota,
147 Opt_usrquota,
148 Opt_grpquota,
149 Opt_prjquota,
150 Opt_usrjquota,
151 Opt_grpjquota,
152 Opt_prjjquota,
153 Opt_offusrjquota,
154 Opt_offgrpjquota,
155 Opt_offprjjquota,
156 Opt_jqfmt_vfsold,
157 Opt_jqfmt_vfsv0,
158 Opt_jqfmt_vfsv1,
159 Opt_alloc,
160 Opt_fsync,
161 Opt_test_dummy_encryption,
162 Opt_inlinecrypt,
163 Opt_checkpoint_disable,
164 Opt_checkpoint_disable_cap,
165 Opt_checkpoint_disable_cap_perc,
166 Opt_checkpoint_enable,
167 Opt_checkpoint_merge,
168 Opt_nocheckpoint_merge,
169 Opt_compress_algorithm,
170 Opt_compress_log_size,
171 Opt_compress_extension,
172 Opt_nocompress_extension,
173 Opt_compress_chksum,
174 Opt_compress_mode,
175 Opt_compress_cache,
176 Opt_atgc,
177 Opt_gc_merge,
178 Opt_nogc_merge,
179 Opt_discard_unit,
180 Opt_memory_mode,
181 Opt_age_extent_cache,
182 Opt_errors,
183 Opt_err,
184};
185
186static match_table_t f2fs_tokens = {
187 {Opt_gc_background, "background_gc=%s"},
188 {Opt_disable_roll_forward, "disable_roll_forward"},
189 {Opt_norecovery, "norecovery"},
190 {Opt_discard, "discard"},
191 {Opt_nodiscard, "nodiscard"},
192 {Opt_noheap, "no_heap"},
193 {Opt_heap, "heap"},
194 {Opt_user_xattr, "user_xattr"},
195 {Opt_nouser_xattr, "nouser_xattr"},
196 {Opt_acl, "acl"},
197 {Opt_noacl, "noacl"},
198 {Opt_active_logs, "active_logs=%u"},
199 {Opt_disable_ext_identify, "disable_ext_identify"},
200 {Opt_inline_xattr, "inline_xattr"},
201 {Opt_noinline_xattr, "noinline_xattr"},
202 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
203 {Opt_inline_data, "inline_data"},
204 {Opt_inline_dentry, "inline_dentry"},
205 {Opt_noinline_dentry, "noinline_dentry"},
206 {Opt_flush_merge, "flush_merge"},
207 {Opt_noflush_merge, "noflush_merge"},
208 {Opt_barrier, "barrier"},
209 {Opt_nobarrier, "nobarrier"},
210 {Opt_fastboot, "fastboot"},
211 {Opt_extent_cache, "extent_cache"},
212 {Opt_noextent_cache, "noextent_cache"},
213 {Opt_noinline_data, "noinline_data"},
214 {Opt_data_flush, "data_flush"},
215 {Opt_reserve_root, "reserve_root=%u"},
216 {Opt_resgid, "resgid=%u"},
217 {Opt_resuid, "resuid=%u"},
218 {Opt_mode, "mode=%s"},
219 {Opt_io_size_bits, "io_bits=%u"},
220 {Opt_fault_injection, "fault_injection=%u"},
221 {Opt_fault_type, "fault_type=%u"},
222 {Opt_lazytime, "lazytime"},
223 {Opt_nolazytime, "nolazytime"},
224 {Opt_quota, "quota"},
225 {Opt_noquota, "noquota"},
226 {Opt_usrquota, "usrquota"},
227 {Opt_grpquota, "grpquota"},
228 {Opt_prjquota, "prjquota"},
229 {Opt_usrjquota, "usrjquota=%s"},
230 {Opt_grpjquota, "grpjquota=%s"},
231 {Opt_prjjquota, "prjjquota=%s"},
232 {Opt_offusrjquota, "usrjquota="},
233 {Opt_offgrpjquota, "grpjquota="},
234 {Opt_offprjjquota, "prjjquota="},
235 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
236 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
237 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
238 {Opt_alloc, "alloc_mode=%s"},
239 {Opt_fsync, "fsync_mode=%s"},
240 {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
241 {Opt_test_dummy_encryption, "test_dummy_encryption"},
242 {Opt_inlinecrypt, "inlinecrypt"},
243 {Opt_checkpoint_disable, "checkpoint=disable"},
244 {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
245 {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
246 {Opt_checkpoint_enable, "checkpoint=enable"},
247 {Opt_checkpoint_merge, "checkpoint_merge"},
248 {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
249 {Opt_compress_algorithm, "compress_algorithm=%s"},
250 {Opt_compress_log_size, "compress_log_size=%u"},
251 {Opt_compress_extension, "compress_extension=%s"},
252 {Opt_nocompress_extension, "nocompress_extension=%s"},
253 {Opt_compress_chksum, "compress_chksum"},
254 {Opt_compress_mode, "compress_mode=%s"},
255 {Opt_compress_cache, "compress_cache"},
256 {Opt_atgc, "atgc"},
257 {Opt_gc_merge, "gc_merge"},
258 {Opt_nogc_merge, "nogc_merge"},
259 {Opt_discard_unit, "discard_unit=%s"},
260 {Opt_memory_mode, "memory=%s"},
261 {Opt_age_extent_cache, "age_extent_cache"},
262 {Opt_errors, "errors=%s"},
263 {Opt_err, NULL},
264};
265
266void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
267{
268 struct va_format vaf;
269 va_list args;
270 int level;
271
272 va_start(args, fmt);
273
274 level = printk_get_level(buffer: fmt);
275 vaf.fmt = printk_skip_level(buffer: fmt);
276 vaf.va = &args;
277 printk("%c%cF2FS-fs (%s): %pV\n",
278 KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
279
280 va_end(args);
281}
282
283#if IS_ENABLED(CONFIG_UNICODE)
284static const struct f2fs_sb_encodings {
285 __u16 magic;
286 char *name;
287 unsigned int version;
288} f2fs_sb_encoding_map[] = {
289 {F2FS_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)},
290};
291
292static const struct f2fs_sb_encodings *
293f2fs_sb_read_encoding(const struct f2fs_super_block *sb)
294{
295 __u16 magic = le16_to_cpu(sb->s_encoding);
296 int i;
297
298 for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
299 if (magic == f2fs_sb_encoding_map[i].magic)
300 return &f2fs_sb_encoding_map[i];
301
302 return NULL;
303}
304
305struct kmem_cache *f2fs_cf_name_slab;
306static int __init f2fs_create_casefold_cache(void)
307{
308 f2fs_cf_name_slab = f2fs_kmem_cache_create(name: "f2fs_casefolded_name",
309 F2FS_NAME_LEN);
310 return f2fs_cf_name_slab ? 0 : -ENOMEM;
311}
312
313static void f2fs_destroy_casefold_cache(void)
314{
315 kmem_cache_destroy(s: f2fs_cf_name_slab);
316}
317#else
318static int __init f2fs_create_casefold_cache(void) { return 0; }
319static void f2fs_destroy_casefold_cache(void) { }
320#endif
321
322static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
323{
324 block_t limit = min((sbi->user_block_count >> 3),
325 sbi->user_block_count - sbi->reserved_blocks);
326
327 /* limit is 12.5% */
328 if (test_opt(sbi, RESERVE_ROOT) &&
329 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
330 F2FS_OPTION(sbi).root_reserved_blocks = limit;
331 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
332 F2FS_OPTION(sbi).root_reserved_blocks);
333 }
334 if (!test_opt(sbi, RESERVE_ROOT) &&
335 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
336 right: make_kuid(from: &init_user_ns, F2FS_DEF_RESUID)) ||
337 !gid_eq(F2FS_OPTION(sbi).s_resgid,
338 right: make_kgid(from: &init_user_ns, F2FS_DEF_RESGID))))
339 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
340 from_kuid_munged(&init_user_ns,
341 F2FS_OPTION(sbi).s_resuid),
342 from_kgid_munged(&init_user_ns,
343 F2FS_OPTION(sbi).s_resgid));
344}
345
346static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
347{
348 unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
349 unsigned int avg_vblocks;
350 unsigned int wanted_reserved_segments;
351 block_t avail_user_block_count;
352
353 if (!F2FS_IO_ALIGNED(sbi))
354 return 0;
355
356 /* average valid block count in section in worst case */
357 avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
358
359 /*
360 * we need enough free space when migrating one section in worst case
361 */
362 wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
363 reserved_segments(sbi);
364 wanted_reserved_segments -= reserved_segments(sbi);
365
366 avail_user_block_count = sbi->user_block_count -
367 sbi->current_reserved_blocks -
368 F2FS_OPTION(sbi).root_reserved_blocks;
369
370 if (wanted_reserved_segments * sbi->blocks_per_seg >
371 avail_user_block_count) {
372 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
373 wanted_reserved_segments,
374 avail_user_block_count >> sbi->log_blocks_per_seg);
375 return -ENOSPC;
376 }
377
378 SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
379
380 f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
381 wanted_reserved_segments);
382
383 return 0;
384}
385
386static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
387{
388 if (!F2FS_OPTION(sbi).unusable_cap_perc)
389 return;
390
391 if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
392 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
393 else
394 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
395 F2FS_OPTION(sbi).unusable_cap_perc;
396
397 f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
398 F2FS_OPTION(sbi).unusable_cap,
399 F2FS_OPTION(sbi).unusable_cap_perc);
400}
401
402static void init_once(void *foo)
403{
404 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
405
406 inode_init_once(&fi->vfs_inode);
407}
408
409#ifdef CONFIG_QUOTA
410static const char * const quotatypes[] = INITQFNAMES;
411#define QTYPE2NAME(t) (quotatypes[t])
412static int f2fs_set_qf_name(struct super_block *sb, int qtype,
413 substring_t *args)
414{
415 struct f2fs_sb_info *sbi = F2FS_SB(sb);
416 char *qname;
417 int ret = -EINVAL;
418
419 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
420 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
421 return -EINVAL;
422 }
423 if (f2fs_sb_has_quota_ino(sbi)) {
424 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
425 return 0;
426 }
427
428 qname = match_strdup(args);
429 if (!qname) {
430 f2fs_err(sbi, "Not enough memory for storing quotafile name");
431 return -ENOMEM;
432 }
433 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
434 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
435 ret = 0;
436 else
437 f2fs_err(sbi, "%s quota file already specified",
438 QTYPE2NAME(qtype));
439 goto errout;
440 }
441 if (strchr(qname, '/')) {
442 f2fs_err(sbi, "quotafile must be on filesystem root");
443 goto errout;
444 }
445 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
446 set_opt(sbi, QUOTA);
447 return 0;
448errout:
449 kfree(objp: qname);
450 return ret;
451}
452
453static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
454{
455 struct f2fs_sb_info *sbi = F2FS_SB(sb);
456
457 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
458 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
459 return -EINVAL;
460 }
461 kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
462 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
463 return 0;
464}
465
466static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
467{
468 /*
469 * We do the test below only for project quotas. 'usrquota' and
470 * 'grpquota' mount options are allowed even without quota feature
471 * to support legacy quotas in quota files.
472 */
473 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
474 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
475 return -1;
476 }
477 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
478 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
479 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
480 if (test_opt(sbi, USRQUOTA) &&
481 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
482 clear_opt(sbi, USRQUOTA);
483
484 if (test_opt(sbi, GRPQUOTA) &&
485 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
486 clear_opt(sbi, GRPQUOTA);
487
488 if (test_opt(sbi, PRJQUOTA) &&
489 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
490 clear_opt(sbi, PRJQUOTA);
491
492 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
493 test_opt(sbi, PRJQUOTA)) {
494 f2fs_err(sbi, "old and new quota format mixing");
495 return -1;
496 }
497
498 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
499 f2fs_err(sbi, "journaled quota format not specified");
500 return -1;
501 }
502 }
503
504 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
505 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
506 F2FS_OPTION(sbi).s_jquota_fmt = 0;
507 }
508 return 0;
509}
510#endif
511
512static int f2fs_set_test_dummy_encryption(struct super_block *sb,
513 const char *opt,
514 const substring_t *arg,
515 bool is_remount)
516{
517 struct f2fs_sb_info *sbi = F2FS_SB(sb);
518 struct fs_parameter param = {
519 .type = fs_value_is_string,
520 .string = arg->from ? arg->from : "",
521 };
522 struct fscrypt_dummy_policy *policy =
523 &F2FS_OPTION(sbi).dummy_enc_policy;
524 int err;
525
526 if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) {
527 f2fs_warn(sbi, "test_dummy_encryption option not supported");
528 return -EINVAL;
529 }
530
531 if (!f2fs_sb_has_encrypt(sbi)) {
532 f2fs_err(sbi, "Encrypt feature is off");
533 return -EINVAL;
534 }
535
536 /*
537 * This mount option is just for testing, and it's not worthwhile to
538 * implement the extra complexity (e.g. RCU protection) that would be
539 * needed to allow it to be set or changed during remount. We do allow
540 * it to be specified during remount, but only if there is no change.
541 */
542 if (is_remount && !fscrypt_is_dummy_policy_set(dummy_policy: policy)) {
543 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
544 return -EINVAL;
545 }
546
547 err = fscrypt_parse_test_dummy_encryption(param: &param, dummy_policy: policy);
548 if (err) {
549 if (err == -EEXIST)
550 f2fs_warn(sbi,
551 "Can't change test_dummy_encryption on remount");
552 else if (err == -EINVAL)
553 f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
554 opt);
555 else
556 f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
557 opt, err);
558 return -EINVAL;
559 }
560 f2fs_warn(sbi, "Test dummy encryption mode enabled");
561 return 0;
562}
563
564#ifdef CONFIG_F2FS_FS_COMPRESSION
565static bool is_compress_extension_exist(struct f2fs_sb_info *sbi,
566 const char *new_ext, bool is_ext)
567{
568 unsigned char (*ext)[F2FS_EXTENSION_LEN];
569 int ext_cnt;
570 int i;
571
572 if (is_ext) {
573 ext = F2FS_OPTION(sbi).extensions;
574 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
575 } else {
576 ext = F2FS_OPTION(sbi).noextensions;
577 ext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
578 }
579
580 for (i = 0; i < ext_cnt; i++) {
581 if (!strcasecmp(s1: new_ext, s2: ext[i]))
582 return true;
583 }
584
585 return false;
586}
587
588/*
589 * 1. The same extension name cannot not appear in both compress and non-compress extension
590 * at the same time.
591 * 2. If the compress extension specifies all files, the types specified by the non-compress
592 * extension will be treated as special cases and will not be compressed.
593 * 3. Don't allow the non-compress extension specifies all files.
594 */
595static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
596{
597 unsigned char (*ext)[F2FS_EXTENSION_LEN];
598 unsigned char (*noext)[F2FS_EXTENSION_LEN];
599 int ext_cnt, noext_cnt, index = 0, no_index = 0;
600
601 ext = F2FS_OPTION(sbi).extensions;
602 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
603 noext = F2FS_OPTION(sbi).noextensions;
604 noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
605
606 if (!noext_cnt)
607 return 0;
608
609 for (no_index = 0; no_index < noext_cnt; no_index++) {
610 if (!strcasecmp(s1: "*", s2: noext[no_index])) {
611 f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
612 return -EINVAL;
613 }
614 for (index = 0; index < ext_cnt; index++) {
615 if (!strcasecmp(s1: ext[index], s2: noext[no_index])) {
616 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
617 ext[index]);
618 return -EINVAL;
619 }
620 }
621 }
622 return 0;
623}
624
625#ifdef CONFIG_F2FS_FS_LZ4
626static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
627{
628#ifdef CONFIG_F2FS_FS_LZ4HC
629 unsigned int level;
630
631 if (strlen(str) == 3) {
632 F2FS_OPTION(sbi).compress_level = 0;
633 return 0;
634 }
635
636 str += 3;
637
638 if (str[0] != ':') {
639 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
640 return -EINVAL;
641 }
642 if (kstrtouint(s: str + 1, base: 10, res: &level))
643 return -EINVAL;
644
645 if (!f2fs_is_compress_level_valid(alg: COMPRESS_LZ4, lvl: level)) {
646 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
647 return -EINVAL;
648 }
649
650 F2FS_OPTION(sbi).compress_level = level;
651 return 0;
652#else
653 if (strlen(str) == 3) {
654 F2FS_OPTION(sbi).compress_level = 0;
655 return 0;
656 }
657 f2fs_info(sbi, "kernel doesn't support lz4hc compression");
658 return -EINVAL;
659#endif
660}
661#endif
662
663#ifdef CONFIG_F2FS_FS_ZSTD
664static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
665{
666 unsigned int level;
667 int len = 4;
668
669 if (strlen(str) == len) {
670 F2FS_OPTION(sbi).compress_level = F2FS_ZSTD_DEFAULT_CLEVEL;
671 return 0;
672 }
673
674 str += len;
675
676 if (str[0] != ':') {
677 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
678 return -EINVAL;
679 }
680 if (kstrtouint(s: str + 1, base: 10, res: &level))
681 return -EINVAL;
682
683 if (!f2fs_is_compress_level_valid(alg: COMPRESS_ZSTD, lvl: level)) {
684 f2fs_info(sbi, "invalid zstd compress level: %d", level);
685 return -EINVAL;
686 }
687
688 F2FS_OPTION(sbi).compress_level = level;
689 return 0;
690}
691#endif
692#endif
693
694static int parse_options(struct super_block *sb, char *options, bool is_remount)
695{
696 struct f2fs_sb_info *sbi = F2FS_SB(sb);
697 substring_t args[MAX_OPT_ARGS];
698#ifdef CONFIG_F2FS_FS_COMPRESSION
699 unsigned char (*ext)[F2FS_EXTENSION_LEN];
700 unsigned char (*noext)[F2FS_EXTENSION_LEN];
701 int ext_cnt, noext_cnt;
702#endif
703 char *p, *name;
704 int arg = 0;
705 kuid_t uid;
706 kgid_t gid;
707 int ret;
708
709 if (!options)
710 goto default_check;
711
712 while ((p = strsep(&options, ",")) != NULL) {
713 int token;
714
715 if (!*p)
716 continue;
717 /*
718 * Initialize args struct so we know whether arg was
719 * found; some options take optional arguments.
720 */
721 args[0].to = args[0].from = NULL;
722 token = match_token(p, table: f2fs_tokens, args);
723
724 switch (token) {
725 case Opt_gc_background:
726 name = match_strdup(&args[0]);
727
728 if (!name)
729 return -ENOMEM;
730 if (!strcmp(name, "on")) {
731 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
732 } else if (!strcmp(name, "off")) {
733 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
734 } else if (!strcmp(name, "sync")) {
735 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
736 } else {
737 kfree(objp: name);
738 return -EINVAL;
739 }
740 kfree(objp: name);
741 break;
742 case Opt_disable_roll_forward:
743 set_opt(sbi, DISABLE_ROLL_FORWARD);
744 break;
745 case Opt_norecovery:
746 /* this option mounts f2fs with ro */
747 set_opt(sbi, NORECOVERY);
748 if (!f2fs_readonly(sb))
749 return -EINVAL;
750 break;
751 case Opt_discard:
752 if (!f2fs_hw_support_discard(sbi)) {
753 f2fs_warn(sbi, "device does not support discard");
754 break;
755 }
756 set_opt(sbi, DISCARD);
757 break;
758 case Opt_nodiscard:
759 if (f2fs_hw_should_discard(sbi)) {
760 f2fs_warn(sbi, "discard is required for zoned block devices");
761 return -EINVAL;
762 }
763 clear_opt(sbi, DISCARD);
764 break;
765 case Opt_noheap:
766 set_opt(sbi, NOHEAP);
767 break;
768 case Opt_heap:
769 clear_opt(sbi, NOHEAP);
770 break;
771#ifdef CONFIG_F2FS_FS_XATTR
772 case Opt_user_xattr:
773 set_opt(sbi, XATTR_USER);
774 break;
775 case Opt_nouser_xattr:
776 clear_opt(sbi, XATTR_USER);
777 break;
778 case Opt_inline_xattr:
779 set_opt(sbi, INLINE_XATTR);
780 break;
781 case Opt_noinline_xattr:
782 clear_opt(sbi, INLINE_XATTR);
783 break;
784 case Opt_inline_xattr_size:
785 if (args->from && match_int(args, result: &arg))
786 return -EINVAL;
787 set_opt(sbi, INLINE_XATTR_SIZE);
788 F2FS_OPTION(sbi).inline_xattr_size = arg;
789 break;
790#else
791 case Opt_user_xattr:
792 f2fs_info(sbi, "user_xattr options not supported");
793 break;
794 case Opt_nouser_xattr:
795 f2fs_info(sbi, "nouser_xattr options not supported");
796 break;
797 case Opt_inline_xattr:
798 f2fs_info(sbi, "inline_xattr options not supported");
799 break;
800 case Opt_noinline_xattr:
801 f2fs_info(sbi, "noinline_xattr options not supported");
802 break;
803#endif
804#ifdef CONFIG_F2FS_FS_POSIX_ACL
805 case Opt_acl:
806 set_opt(sbi, POSIX_ACL);
807 break;
808 case Opt_noacl:
809 clear_opt(sbi, POSIX_ACL);
810 break;
811#else
812 case Opt_acl:
813 f2fs_info(sbi, "acl options not supported");
814 break;
815 case Opt_noacl:
816 f2fs_info(sbi, "noacl options not supported");
817 break;
818#endif
819 case Opt_active_logs:
820 if (args->from && match_int(args, result: &arg))
821 return -EINVAL;
822 if (arg != 2 && arg != 4 &&
823 arg != NR_CURSEG_PERSIST_TYPE)
824 return -EINVAL;
825 F2FS_OPTION(sbi).active_logs = arg;
826 break;
827 case Opt_disable_ext_identify:
828 set_opt(sbi, DISABLE_EXT_IDENTIFY);
829 break;
830 case Opt_inline_data:
831 set_opt(sbi, INLINE_DATA);
832 break;
833 case Opt_inline_dentry:
834 set_opt(sbi, INLINE_DENTRY);
835 break;
836 case Opt_noinline_dentry:
837 clear_opt(sbi, INLINE_DENTRY);
838 break;
839 case Opt_flush_merge:
840 set_opt(sbi, FLUSH_MERGE);
841 break;
842 case Opt_noflush_merge:
843 clear_opt(sbi, FLUSH_MERGE);
844 break;
845 case Opt_nobarrier:
846 set_opt(sbi, NOBARRIER);
847 break;
848 case Opt_barrier:
849 clear_opt(sbi, NOBARRIER);
850 break;
851 case Opt_fastboot:
852 set_opt(sbi, FASTBOOT);
853 break;
854 case Opt_extent_cache:
855 set_opt(sbi, READ_EXTENT_CACHE);
856 break;
857 case Opt_noextent_cache:
858 clear_opt(sbi, READ_EXTENT_CACHE);
859 break;
860 case Opt_noinline_data:
861 clear_opt(sbi, INLINE_DATA);
862 break;
863 case Opt_data_flush:
864 set_opt(sbi, DATA_FLUSH);
865 break;
866 case Opt_reserve_root:
867 if (args->from && match_int(args, result: &arg))
868 return -EINVAL;
869 if (test_opt(sbi, RESERVE_ROOT)) {
870 f2fs_info(sbi, "Preserve previous reserve_root=%u",
871 F2FS_OPTION(sbi).root_reserved_blocks);
872 } else {
873 F2FS_OPTION(sbi).root_reserved_blocks = arg;
874 set_opt(sbi, RESERVE_ROOT);
875 }
876 break;
877 case Opt_resuid:
878 if (args->from && match_int(args, result: &arg))
879 return -EINVAL;
880 uid = make_kuid(current_user_ns(), uid: arg);
881 if (!uid_valid(uid)) {
882 f2fs_err(sbi, "Invalid uid value %d", arg);
883 return -EINVAL;
884 }
885 F2FS_OPTION(sbi).s_resuid = uid;
886 break;
887 case Opt_resgid:
888 if (args->from && match_int(args, result: &arg))
889 return -EINVAL;
890 gid = make_kgid(current_user_ns(), gid: arg);
891 if (!gid_valid(gid)) {
892 f2fs_err(sbi, "Invalid gid value %d", arg);
893 return -EINVAL;
894 }
895 F2FS_OPTION(sbi).s_resgid = gid;
896 break;
897 case Opt_mode:
898 name = match_strdup(&args[0]);
899
900 if (!name)
901 return -ENOMEM;
902 if (!strcmp(name, "adaptive")) {
903 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
904 } else if (!strcmp(name, "lfs")) {
905 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
906 } else if (!strcmp(name, "fragment:segment")) {
907 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
908 } else if (!strcmp(name, "fragment:block")) {
909 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
910 } else {
911 kfree(objp: name);
912 return -EINVAL;
913 }
914 kfree(objp: name);
915 break;
916 case Opt_io_size_bits:
917 if (args->from && match_int(args, result: &arg))
918 return -EINVAL;
919 if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
920 f2fs_warn(sbi, "Not support %ld, larger than %d",
921 BIT(arg), BIO_MAX_VECS);
922 return -EINVAL;
923 }
924 F2FS_OPTION(sbi).write_io_size_bits = arg;
925 break;
926#ifdef CONFIG_F2FS_FAULT_INJECTION
927 case Opt_fault_injection:
928 if (args->from && match_int(args, result: &arg))
929 return -EINVAL;
930 f2fs_build_fault_attr(sbi, rate: arg, F2FS_ALL_FAULT_TYPE);
931 set_opt(sbi, FAULT_INJECTION);
932 break;
933
934 case Opt_fault_type:
935 if (args->from && match_int(args, result: &arg))
936 return -EINVAL;
937 f2fs_build_fault_attr(sbi, rate: 0, type: arg);
938 set_opt(sbi, FAULT_INJECTION);
939 break;
940#else
941 case Opt_fault_injection:
942 f2fs_info(sbi, "fault_injection options not supported");
943 break;
944
945 case Opt_fault_type:
946 f2fs_info(sbi, "fault_type options not supported");
947 break;
948#endif
949 case Opt_lazytime:
950 sb->s_flags |= SB_LAZYTIME;
951 break;
952 case Opt_nolazytime:
953 sb->s_flags &= ~SB_LAZYTIME;
954 break;
955#ifdef CONFIG_QUOTA
956 case Opt_quota:
957 case Opt_usrquota:
958 set_opt(sbi, USRQUOTA);
959 break;
960 case Opt_grpquota:
961 set_opt(sbi, GRPQUOTA);
962 break;
963 case Opt_prjquota:
964 set_opt(sbi, PRJQUOTA);
965 break;
966 case Opt_usrjquota:
967 ret = f2fs_set_qf_name(sb, qtype: USRQUOTA, args: &args[0]);
968 if (ret)
969 return ret;
970 break;
971 case Opt_grpjquota:
972 ret = f2fs_set_qf_name(sb, qtype: GRPQUOTA, args: &args[0]);
973 if (ret)
974 return ret;
975 break;
976 case Opt_prjjquota:
977 ret = f2fs_set_qf_name(sb, qtype: PRJQUOTA, args: &args[0]);
978 if (ret)
979 return ret;
980 break;
981 case Opt_offusrjquota:
982 ret = f2fs_clear_qf_name(sb, qtype: USRQUOTA);
983 if (ret)
984 return ret;
985 break;
986 case Opt_offgrpjquota:
987 ret = f2fs_clear_qf_name(sb, qtype: GRPQUOTA);
988 if (ret)
989 return ret;
990 break;
991 case Opt_offprjjquota:
992 ret = f2fs_clear_qf_name(sb, qtype: PRJQUOTA);
993 if (ret)
994 return ret;
995 break;
996 case Opt_jqfmt_vfsold:
997 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
998 break;
999 case Opt_jqfmt_vfsv0:
1000 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
1001 break;
1002 case Opt_jqfmt_vfsv1:
1003 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
1004 break;
1005 case Opt_noquota:
1006 clear_opt(sbi, QUOTA);
1007 clear_opt(sbi, USRQUOTA);
1008 clear_opt(sbi, GRPQUOTA);
1009 clear_opt(sbi, PRJQUOTA);
1010 break;
1011#else
1012 case Opt_quota:
1013 case Opt_usrquota:
1014 case Opt_grpquota:
1015 case Opt_prjquota:
1016 case Opt_usrjquota:
1017 case Opt_grpjquota:
1018 case Opt_prjjquota:
1019 case Opt_offusrjquota:
1020 case Opt_offgrpjquota:
1021 case Opt_offprjjquota:
1022 case Opt_jqfmt_vfsold:
1023 case Opt_jqfmt_vfsv0:
1024 case Opt_jqfmt_vfsv1:
1025 case Opt_noquota:
1026 f2fs_info(sbi, "quota operations not supported");
1027 break;
1028#endif
1029 case Opt_alloc:
1030 name = match_strdup(&args[0]);
1031 if (!name)
1032 return -ENOMEM;
1033
1034 if (!strcmp(name, "default")) {
1035 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1036 } else if (!strcmp(name, "reuse")) {
1037 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1038 } else {
1039 kfree(objp: name);
1040 return -EINVAL;
1041 }
1042 kfree(objp: name);
1043 break;
1044 case Opt_fsync:
1045 name = match_strdup(&args[0]);
1046 if (!name)
1047 return -ENOMEM;
1048 if (!strcmp(name, "posix")) {
1049 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1050 } else if (!strcmp(name, "strict")) {
1051 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1052 } else if (!strcmp(name, "nobarrier")) {
1053 F2FS_OPTION(sbi).fsync_mode =
1054 FSYNC_MODE_NOBARRIER;
1055 } else {
1056 kfree(objp: name);
1057 return -EINVAL;
1058 }
1059 kfree(objp: name);
1060 break;
1061 case Opt_test_dummy_encryption:
1062 ret = f2fs_set_test_dummy_encryption(sb, opt: p, arg: &args[0],
1063 is_remount);
1064 if (ret)
1065 return ret;
1066 break;
1067 case Opt_inlinecrypt:
1068#ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1069 sb->s_flags |= SB_INLINECRYPT;
1070#else
1071 f2fs_info(sbi, "inline encryption not supported");
1072#endif
1073 break;
1074 case Opt_checkpoint_disable_cap_perc:
1075 if (args->from && match_int(args, result: &arg))
1076 return -EINVAL;
1077 if (arg < 0 || arg > 100)
1078 return -EINVAL;
1079 F2FS_OPTION(sbi).unusable_cap_perc = arg;
1080 set_opt(sbi, DISABLE_CHECKPOINT);
1081 break;
1082 case Opt_checkpoint_disable_cap:
1083 if (args->from && match_int(args, result: &arg))
1084 return -EINVAL;
1085 F2FS_OPTION(sbi).unusable_cap = arg;
1086 set_opt(sbi, DISABLE_CHECKPOINT);
1087 break;
1088 case Opt_checkpoint_disable:
1089 set_opt(sbi, DISABLE_CHECKPOINT);
1090 break;
1091 case Opt_checkpoint_enable:
1092 clear_opt(sbi, DISABLE_CHECKPOINT);
1093 break;
1094 case Opt_checkpoint_merge:
1095 set_opt(sbi, MERGE_CHECKPOINT);
1096 break;
1097 case Opt_nocheckpoint_merge:
1098 clear_opt(sbi, MERGE_CHECKPOINT);
1099 break;
1100#ifdef CONFIG_F2FS_FS_COMPRESSION
1101 case Opt_compress_algorithm:
1102 if (!f2fs_sb_has_compression(sbi)) {
1103 f2fs_info(sbi, "Image doesn't support compression");
1104 break;
1105 }
1106 name = match_strdup(&args[0]);
1107 if (!name)
1108 return -ENOMEM;
1109 if (!strcmp(name, "lzo")) {
1110#ifdef CONFIG_F2FS_FS_LZO
1111 F2FS_OPTION(sbi).compress_level = 0;
1112 F2FS_OPTION(sbi).compress_algorithm =
1113 COMPRESS_LZO;
1114#else
1115 f2fs_info(sbi, "kernel doesn't support lzo compression");
1116#endif
1117 } else if (!strncmp(name, "lz4", 3)) {
1118#ifdef CONFIG_F2FS_FS_LZ4
1119 ret = f2fs_set_lz4hc_level(sbi, str: name);
1120 if (ret) {
1121 kfree(objp: name);
1122 return -EINVAL;
1123 }
1124 F2FS_OPTION(sbi).compress_algorithm =
1125 COMPRESS_LZ4;
1126#else
1127 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1128#endif
1129 } else if (!strncmp(name, "zstd", 4)) {
1130#ifdef CONFIG_F2FS_FS_ZSTD
1131 ret = f2fs_set_zstd_level(sbi, str: name);
1132 if (ret) {
1133 kfree(objp: name);
1134 return -EINVAL;
1135 }
1136 F2FS_OPTION(sbi).compress_algorithm =
1137 COMPRESS_ZSTD;
1138#else
1139 f2fs_info(sbi, "kernel doesn't support zstd compression");
1140#endif
1141 } else if (!strcmp(name, "lzo-rle")) {
1142#ifdef CONFIG_F2FS_FS_LZORLE
1143 F2FS_OPTION(sbi).compress_level = 0;
1144 F2FS_OPTION(sbi).compress_algorithm =
1145 COMPRESS_LZORLE;
1146#else
1147 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1148#endif
1149 } else {
1150 kfree(objp: name);
1151 return -EINVAL;
1152 }
1153 kfree(objp: name);
1154 break;
1155 case Opt_compress_log_size:
1156 if (!f2fs_sb_has_compression(sbi)) {
1157 f2fs_info(sbi, "Image doesn't support compression");
1158 break;
1159 }
1160 if (args->from && match_int(args, result: &arg))
1161 return -EINVAL;
1162 if (arg < MIN_COMPRESS_LOG_SIZE ||
1163 arg > MAX_COMPRESS_LOG_SIZE) {
1164 f2fs_err(sbi,
1165 "Compress cluster log size is out of range");
1166 return -EINVAL;
1167 }
1168 F2FS_OPTION(sbi).compress_log_size = arg;
1169 break;
1170 case Opt_compress_extension:
1171 if (!f2fs_sb_has_compression(sbi)) {
1172 f2fs_info(sbi, "Image doesn't support compression");
1173 break;
1174 }
1175 name = match_strdup(&args[0]);
1176 if (!name)
1177 return -ENOMEM;
1178
1179 ext = F2FS_OPTION(sbi).extensions;
1180 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1181
1182 if (strlen(name) >= F2FS_EXTENSION_LEN ||
1183 ext_cnt >= COMPRESS_EXT_NUM) {
1184 f2fs_err(sbi,
1185 "invalid extension length/number");
1186 kfree(objp: name);
1187 return -EINVAL;
1188 }
1189
1190 if (is_compress_extension_exist(sbi, new_ext: name, is_ext: true)) {
1191 kfree(objp: name);
1192 break;
1193 }
1194
1195 strcpy(p: ext[ext_cnt], q: name);
1196 F2FS_OPTION(sbi).compress_ext_cnt++;
1197 kfree(objp: name);
1198 break;
1199 case Opt_nocompress_extension:
1200 if (!f2fs_sb_has_compression(sbi)) {
1201 f2fs_info(sbi, "Image doesn't support compression");
1202 break;
1203 }
1204 name = match_strdup(&args[0]);
1205 if (!name)
1206 return -ENOMEM;
1207
1208 noext = F2FS_OPTION(sbi).noextensions;
1209 noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1210
1211 if (strlen(name) >= F2FS_EXTENSION_LEN ||
1212 noext_cnt >= COMPRESS_EXT_NUM) {
1213 f2fs_err(sbi,
1214 "invalid extension length/number");
1215 kfree(objp: name);
1216 return -EINVAL;
1217 }
1218
1219 if (is_compress_extension_exist(sbi, new_ext: name, is_ext: false)) {
1220 kfree(objp: name);
1221 break;
1222 }
1223
1224 strcpy(p: noext[noext_cnt], q: name);
1225 F2FS_OPTION(sbi).nocompress_ext_cnt++;
1226 kfree(objp: name);
1227 break;
1228 case Opt_compress_chksum:
1229 if (!f2fs_sb_has_compression(sbi)) {
1230 f2fs_info(sbi, "Image doesn't support compression");
1231 break;
1232 }
1233 F2FS_OPTION(sbi).compress_chksum = true;
1234 break;
1235 case Opt_compress_mode:
1236 if (!f2fs_sb_has_compression(sbi)) {
1237 f2fs_info(sbi, "Image doesn't support compression");
1238 break;
1239 }
1240 name = match_strdup(&args[0]);
1241 if (!name)
1242 return -ENOMEM;
1243 if (!strcmp(name, "fs")) {
1244 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1245 } else if (!strcmp(name, "user")) {
1246 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1247 } else {
1248 kfree(objp: name);
1249 return -EINVAL;
1250 }
1251 kfree(objp: name);
1252 break;
1253 case Opt_compress_cache:
1254 if (!f2fs_sb_has_compression(sbi)) {
1255 f2fs_info(sbi, "Image doesn't support compression");
1256 break;
1257 }
1258 set_opt(sbi, COMPRESS_CACHE);
1259 break;
1260#else
1261 case Opt_compress_algorithm:
1262 case Opt_compress_log_size:
1263 case Opt_compress_extension:
1264 case Opt_nocompress_extension:
1265 case Opt_compress_chksum:
1266 case Opt_compress_mode:
1267 case Opt_compress_cache:
1268 f2fs_info(sbi, "compression options not supported");
1269 break;
1270#endif
1271 case Opt_atgc:
1272 set_opt(sbi, ATGC);
1273 break;
1274 case Opt_gc_merge:
1275 set_opt(sbi, GC_MERGE);
1276 break;
1277 case Opt_nogc_merge:
1278 clear_opt(sbi, GC_MERGE);
1279 break;
1280 case Opt_discard_unit:
1281 name = match_strdup(&args[0]);
1282 if (!name)
1283 return -ENOMEM;
1284 if (!strcmp(name, "block")) {
1285 F2FS_OPTION(sbi).discard_unit =
1286 DISCARD_UNIT_BLOCK;
1287 } else if (!strcmp(name, "segment")) {
1288 F2FS_OPTION(sbi).discard_unit =
1289 DISCARD_UNIT_SEGMENT;
1290 } else if (!strcmp(name, "section")) {
1291 F2FS_OPTION(sbi).discard_unit =
1292 DISCARD_UNIT_SECTION;
1293 } else {
1294 kfree(objp: name);
1295 return -EINVAL;
1296 }
1297 kfree(objp: name);
1298 break;
1299 case Opt_memory_mode:
1300 name = match_strdup(&args[0]);
1301 if (!name)
1302 return -ENOMEM;
1303 if (!strcmp(name, "normal")) {
1304 F2FS_OPTION(sbi).memory_mode =
1305 MEMORY_MODE_NORMAL;
1306 } else if (!strcmp(name, "low")) {
1307 F2FS_OPTION(sbi).memory_mode =
1308 MEMORY_MODE_LOW;
1309 } else {
1310 kfree(objp: name);
1311 return -EINVAL;
1312 }
1313 kfree(objp: name);
1314 break;
1315 case Opt_age_extent_cache:
1316 set_opt(sbi, AGE_EXTENT_CACHE);
1317 break;
1318 case Opt_errors:
1319 name = match_strdup(&args[0]);
1320 if (!name)
1321 return -ENOMEM;
1322 if (!strcmp(name, "remount-ro")) {
1323 F2FS_OPTION(sbi).errors =
1324 MOUNT_ERRORS_READONLY;
1325 } else if (!strcmp(name, "continue")) {
1326 F2FS_OPTION(sbi).errors =
1327 MOUNT_ERRORS_CONTINUE;
1328 } else if (!strcmp(name, "panic")) {
1329 F2FS_OPTION(sbi).errors =
1330 MOUNT_ERRORS_PANIC;
1331 } else {
1332 kfree(objp: name);
1333 return -EINVAL;
1334 }
1335 kfree(objp: name);
1336 break;
1337 default:
1338 f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1339 p);
1340 return -EINVAL;
1341 }
1342 }
1343default_check:
1344#ifdef CONFIG_QUOTA
1345 if (f2fs_check_quota_options(sbi))
1346 return -EINVAL;
1347#else
1348 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1349 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1350 return -EINVAL;
1351 }
1352 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1353 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1354 return -EINVAL;
1355 }
1356#endif
1357#if !IS_ENABLED(CONFIG_UNICODE)
1358 if (f2fs_sb_has_casefold(sbi)) {
1359 f2fs_err(sbi,
1360 "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1361 return -EINVAL;
1362 }
1363#endif
1364 /*
1365 * The BLKZONED feature indicates that the drive was formatted with
1366 * zone alignment optimization. This is optional for host-aware
1367 * devices, but mandatory for host-managed zoned block devices.
1368 */
1369 if (f2fs_sb_has_blkzoned(sbi)) {
1370#ifdef CONFIG_BLK_DEV_ZONED
1371 if (F2FS_OPTION(sbi).discard_unit !=
1372 DISCARD_UNIT_SECTION) {
1373 f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1374 F2FS_OPTION(sbi).discard_unit =
1375 DISCARD_UNIT_SECTION;
1376 }
1377
1378 if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
1379 f2fs_info(sbi, "Only lfs mode is allowed with zoned block device feature");
1380 return -EINVAL;
1381 }
1382#else
1383 f2fs_err(sbi, "Zoned block device support is not enabled");
1384 return -EINVAL;
1385#endif
1386 }
1387
1388#ifdef CONFIG_F2FS_FS_COMPRESSION
1389 if (f2fs_test_compress_extension(sbi)) {
1390 f2fs_err(sbi, "invalid compress or nocompress extension");
1391 return -EINVAL;
1392 }
1393#endif
1394
1395 if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1396 f2fs_err(sbi, "Should set mode=lfs with %luKB-sized IO",
1397 F2FS_IO_SIZE_KB(sbi));
1398 return -EINVAL;
1399 }
1400
1401 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1402 int min_size, max_size;
1403
1404 if (!f2fs_sb_has_extra_attr(sbi) ||
1405 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1406 f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1407 return -EINVAL;
1408 }
1409 if (!test_opt(sbi, INLINE_XATTR)) {
1410 f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1411 return -EINVAL;
1412 }
1413
1414 min_size = MIN_INLINE_XATTR_SIZE;
1415 max_size = MAX_INLINE_XATTR_SIZE;
1416
1417 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1418 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1419 f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1420 min_size, max_size);
1421 return -EINVAL;
1422 }
1423 }
1424
1425 if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1426 f2fs_err(sbi, "LFS is not compatible with checkpoint=disable");
1427 return -EINVAL;
1428 }
1429
1430 if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
1431 f2fs_err(sbi, "LFS is not compatible with ATGC");
1432 return -EINVAL;
1433 }
1434
1435 if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
1436 f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
1437 return -EINVAL;
1438 }
1439
1440 if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sb: sbi->sb)) {
1441 f2fs_err(sbi, "Allow to mount readonly mode only");
1442 return -EROFS;
1443 }
1444 return 0;
1445}
1446
1447static struct inode *f2fs_alloc_inode(struct super_block *sb)
1448{
1449 struct f2fs_inode_info *fi;
1450
1451 if (time_to_inject(F2FS_SB(sb), FAULT_SLAB_ALLOC))
1452 return NULL;
1453
1454 fi = alloc_inode_sb(sb, cache: f2fs_inode_cachep, GFP_F2FS_ZERO);
1455 if (!fi)
1456 return NULL;
1457
1458 init_once(foo: (void *) fi);
1459
1460 /* Initialize f2fs-specific inode info */
1461 atomic_set(v: &fi->dirty_pages, i: 0);
1462 atomic_set(v: &fi->i_compr_blocks, i: 0);
1463 init_f2fs_rwsem(&fi->i_sem);
1464 spin_lock_init(&fi->i_size_lock);
1465 INIT_LIST_HEAD(list: &fi->dirty_list);
1466 INIT_LIST_HEAD(list: &fi->gdirty_list);
1467 init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1468 init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1469 init_f2fs_rwsem(&fi->i_xattr_sem);
1470
1471 /* Will be used by directory only */
1472 fi->i_dir_level = F2FS_SB(sb)->dir_level;
1473
1474 return &fi->vfs_inode;
1475}
1476
1477static int f2fs_drop_inode(struct inode *inode)
1478{
1479 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1480 int ret;
1481
1482 /*
1483 * during filesystem shutdown, if checkpoint is disabled,
1484 * drop useless meta/node dirty pages.
1485 */
1486 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1487 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1488 inode->i_ino == F2FS_META_INO(sbi)) {
1489 trace_f2fs_drop_inode(inode, ret: 1);
1490 return 1;
1491 }
1492 }
1493
1494 /*
1495 * This is to avoid a deadlock condition like below.
1496 * writeback_single_inode(inode)
1497 * - f2fs_write_data_page
1498 * - f2fs_gc -> iput -> evict
1499 * - inode_wait_for_writeback(inode)
1500 */
1501 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1502 if (!inode->i_nlink && !is_bad_inode(inode)) {
1503 /* to avoid evict_inode call simultaneously */
1504 atomic_inc(v: &inode->i_count);
1505 spin_unlock(lock: &inode->i_lock);
1506
1507 /* should remain fi->extent_tree for writepage */
1508 f2fs_destroy_extent_node(inode);
1509
1510 sb_start_intwrite(sb: inode->i_sb);
1511 f2fs_i_size_write(inode, i_size: 0);
1512
1513 f2fs_submit_merged_write_cond(sbi: F2FS_I_SB(inode),
1514 inode, NULL, ino: 0, type: DATA);
1515 truncate_inode_pages_final(inode->i_mapping);
1516
1517 if (F2FS_HAS_BLOCKS(inode))
1518 f2fs_truncate(inode);
1519
1520 sb_end_intwrite(sb: inode->i_sb);
1521
1522 spin_lock(lock: &inode->i_lock);
1523 atomic_dec(v: &inode->i_count);
1524 }
1525 trace_f2fs_drop_inode(inode, ret: 0);
1526 return 0;
1527 }
1528 ret = generic_drop_inode(inode);
1529 if (!ret)
1530 ret = fscrypt_drop_inode(inode);
1531 trace_f2fs_drop_inode(inode, ret);
1532 return ret;
1533}
1534
1535int f2fs_inode_dirtied(struct inode *inode, bool sync)
1536{
1537 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1538 int ret = 0;
1539
1540 spin_lock(lock: &sbi->inode_lock[DIRTY_META]);
1541 if (is_inode_flag_set(inode, flag: FI_DIRTY_INODE)) {
1542 ret = 1;
1543 } else {
1544 set_inode_flag(inode, flag: FI_DIRTY_INODE);
1545 stat_inc_dirty_inode(sbi, DIRTY_META);
1546 }
1547 if (sync && list_empty(head: &F2FS_I(inode)->gdirty_list)) {
1548 list_add_tail(new: &F2FS_I(inode)->gdirty_list,
1549 head: &sbi->inode_list[DIRTY_META]);
1550 inc_page_count(sbi, count_type: F2FS_DIRTY_IMETA);
1551 }
1552 spin_unlock(lock: &sbi->inode_lock[DIRTY_META]);
1553 return ret;
1554}
1555
1556void f2fs_inode_synced(struct inode *inode)
1557{
1558 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1559
1560 spin_lock(lock: &sbi->inode_lock[DIRTY_META]);
1561 if (!is_inode_flag_set(inode, flag: FI_DIRTY_INODE)) {
1562 spin_unlock(lock: &sbi->inode_lock[DIRTY_META]);
1563 return;
1564 }
1565 if (!list_empty(head: &F2FS_I(inode)->gdirty_list)) {
1566 list_del_init(entry: &F2FS_I(inode)->gdirty_list);
1567 dec_page_count(sbi, count_type: F2FS_DIRTY_IMETA);
1568 }
1569 clear_inode_flag(inode, flag: FI_DIRTY_INODE);
1570 clear_inode_flag(inode, flag: FI_AUTO_RECOVER);
1571 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1572 spin_unlock(lock: &sbi->inode_lock[DIRTY_META]);
1573}
1574
1575/*
1576 * f2fs_dirty_inode() is called from __mark_inode_dirty()
1577 *
1578 * We should call set_dirty_inode to write the dirty inode through write_inode.
1579 */
1580static void f2fs_dirty_inode(struct inode *inode, int flags)
1581{
1582 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1583
1584 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1585 inode->i_ino == F2FS_META_INO(sbi))
1586 return;
1587
1588 if (is_inode_flag_set(inode, flag: FI_AUTO_RECOVER))
1589 clear_inode_flag(inode, flag: FI_AUTO_RECOVER);
1590
1591 f2fs_inode_dirtied(inode, sync: false);
1592}
1593
1594static void f2fs_free_inode(struct inode *inode)
1595{
1596 fscrypt_free_inode(inode);
1597 kmem_cache_free(s: f2fs_inode_cachep, objp: F2FS_I(inode));
1598}
1599
1600static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1601{
1602 percpu_counter_destroy(fbc: &sbi->total_valid_inode_count);
1603 percpu_counter_destroy(fbc: &sbi->rf_node_block_count);
1604 percpu_counter_destroy(fbc: &sbi->alloc_valid_block_count);
1605}
1606
1607static void destroy_device_list(struct f2fs_sb_info *sbi)
1608{
1609 int i;
1610
1611 for (i = 0; i < sbi->s_ndevs; i++) {
1612 if (i > 0)
1613 bdev_release(FDEV(i).bdev_handle);
1614#ifdef CONFIG_BLK_DEV_ZONED
1615 kvfree(FDEV(i).blkz_seq);
1616#endif
1617 }
1618 kvfree(addr: sbi->devs);
1619}
1620
1621static void f2fs_put_super(struct super_block *sb)
1622{
1623 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1624 int i;
1625 int err = 0;
1626 bool done;
1627
1628 /* unregister procfs/sysfs entries in advance to avoid race case */
1629 f2fs_unregister_sysfs(sbi);
1630
1631 f2fs_quota_off_umount(sb);
1632
1633 /* prevent remaining shrinker jobs */
1634 mutex_lock(&sbi->umount_mutex);
1635
1636 /*
1637 * flush all issued checkpoints and stop checkpoint issue thread.
1638 * after then, all checkpoints should be done by each process context.
1639 */
1640 f2fs_stop_ckpt_thread(sbi);
1641
1642 /*
1643 * We don't need to do checkpoint when superblock is clean.
1644 * But, the previous checkpoint was not done by umount, it needs to do
1645 * clean checkpoint again.
1646 */
1647 if ((is_sbi_flag_set(sbi, type: SBI_IS_DIRTY) ||
1648 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1649 struct cp_control cpc = {
1650 .reason = CP_UMOUNT,
1651 };
1652 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1653 err = f2fs_write_checkpoint(sbi, cpc: &cpc);
1654 }
1655
1656 /* be sure to wait for any on-going discard commands */
1657 done = f2fs_issue_discard_timeout(sbi);
1658 if (f2fs_realtime_discard_enable(sbi) && !sbi->discard_blks && done) {
1659 struct cp_control cpc = {
1660 .reason = CP_UMOUNT | CP_TRIMMED,
1661 };
1662 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1663 err = f2fs_write_checkpoint(sbi, cpc: &cpc);
1664 }
1665
1666 /*
1667 * normally superblock is clean, so we need to release this.
1668 * In addition, EIO will skip do checkpoint, we need this as well.
1669 */
1670 f2fs_release_ino_entry(sbi, all: true);
1671
1672 f2fs_leave_shrinker(sbi);
1673 mutex_unlock(lock: &sbi->umount_mutex);
1674
1675 /* our cp_error case, we can wait for any writeback page */
1676 f2fs_flush_merged_writes(sbi);
1677
1678 f2fs_wait_on_all_pages(sbi, type: F2FS_WB_CP_DATA);
1679
1680 if (err || f2fs_cp_error(sbi)) {
1681 truncate_inode_pages_final(NODE_MAPPING(sbi));
1682 truncate_inode_pages_final(META_MAPPING(sbi));
1683 }
1684
1685 for (i = 0; i < NR_COUNT_TYPE; i++) {
1686 if (!get_pages(sbi, count_type: i))
1687 continue;
1688 f2fs_err(sbi, "detect filesystem reference count leak during "
1689 "umount, type: %d, count: %lld", i, get_pages(sbi, i));
1690 f2fs_bug_on(sbi, 1);
1691 }
1692
1693 f2fs_bug_on(sbi, sbi->fsync_node_num);
1694
1695 f2fs_destroy_compress_inode(sbi);
1696
1697 iput(sbi->node_inode);
1698 sbi->node_inode = NULL;
1699
1700 iput(sbi->meta_inode);
1701 sbi->meta_inode = NULL;
1702
1703 /*
1704 * iput() can update stat information, if f2fs_write_checkpoint()
1705 * above failed with error.
1706 */
1707 f2fs_destroy_stats(sbi);
1708
1709 /* destroy f2fs internal modules */
1710 f2fs_destroy_node_manager(sbi);
1711 f2fs_destroy_segment_manager(sbi);
1712
1713 /* flush s_error_work before sbi destroy */
1714 flush_work(work: &sbi->s_error_work);
1715
1716 f2fs_destroy_post_read_wq(sbi);
1717
1718 kvfree(addr: sbi->ckpt);
1719
1720 sb->s_fs_info = NULL;
1721 if (sbi->s_chksum_driver)
1722 crypto_free_shash(tfm: sbi->s_chksum_driver);
1723 kfree(objp: sbi->raw_super);
1724
1725 destroy_device_list(sbi);
1726 f2fs_destroy_page_array_cache(sbi);
1727 f2fs_destroy_xattr_caches(sbi);
1728 mempool_destroy(pool: sbi->write_io_dummy);
1729#ifdef CONFIG_QUOTA
1730 for (i = 0; i < MAXQUOTAS; i++)
1731 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1732#endif
1733 fscrypt_free_dummy_policy(dummy_policy: &F2FS_OPTION(sbi).dummy_enc_policy);
1734 destroy_percpu_info(sbi);
1735 f2fs_destroy_iostat(sbi);
1736 for (i = 0; i < NR_PAGE_TYPE; i++)
1737 kvfree(addr: sbi->write_io[i]);
1738#if IS_ENABLED(CONFIG_UNICODE)
1739 utf8_unload(um: sb->s_encoding);
1740#endif
1741 kfree(objp: sbi);
1742}
1743
1744int f2fs_sync_fs(struct super_block *sb, int sync)
1745{
1746 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1747 int err = 0;
1748
1749 if (unlikely(f2fs_cp_error(sbi)))
1750 return 0;
1751 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1752 return 0;
1753
1754 trace_f2fs_sync_fs(sb, wait: sync);
1755
1756 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1757 return -EAGAIN;
1758
1759 if (sync) {
1760 stat_inc_cp_call_count(sbi, TOTAL_CALL);
1761 err = f2fs_issue_checkpoint(sbi);
1762 }
1763
1764 return err;
1765}
1766
1767static int f2fs_freeze(struct super_block *sb)
1768{
1769 if (f2fs_readonly(sb))
1770 return 0;
1771
1772 /* IO error happened before */
1773 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1774 return -EIO;
1775
1776 /* must be clean, since sync_filesystem() was already called */
1777 if (is_sbi_flag_set(sbi: F2FS_SB(sb), type: SBI_IS_DIRTY))
1778 return -EINVAL;
1779
1780 /* Let's flush checkpoints and stop the thread. */
1781 f2fs_flush_ckpt_thread(sbi: F2FS_SB(sb));
1782
1783 /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1784 set_sbi_flag(sbi: F2FS_SB(sb), type: SBI_IS_FREEZING);
1785 return 0;
1786}
1787
1788static int f2fs_unfreeze(struct super_block *sb)
1789{
1790 clear_sbi_flag(sbi: F2FS_SB(sb), type: SBI_IS_FREEZING);
1791 return 0;
1792}
1793
1794#ifdef CONFIG_QUOTA
1795static int f2fs_statfs_project(struct super_block *sb,
1796 kprojid_t projid, struct kstatfs *buf)
1797{
1798 struct kqid qid;
1799 struct dquot *dquot;
1800 u64 limit;
1801 u64 curblock;
1802
1803 qid = make_kqid_projid(projid);
1804 dquot = dqget(sb, qid);
1805 if (IS_ERR(ptr: dquot))
1806 return PTR_ERR(ptr: dquot);
1807 spin_lock(lock: &dquot->dq_dqb_lock);
1808
1809 limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1810 dquot->dq_dqb.dqb_bhardlimit);
1811 if (limit)
1812 limit >>= sb->s_blocksize_bits;
1813
1814 if (limit && buf->f_blocks > limit) {
1815 curblock = (dquot->dq_dqb.dqb_curspace +
1816 dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1817 buf->f_blocks = limit;
1818 buf->f_bfree = buf->f_bavail =
1819 (buf->f_blocks > curblock) ?
1820 (buf->f_blocks - curblock) : 0;
1821 }
1822
1823 limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1824 dquot->dq_dqb.dqb_ihardlimit);
1825
1826 if (limit && buf->f_files > limit) {
1827 buf->f_files = limit;
1828 buf->f_ffree =
1829 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1830 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1831 }
1832
1833 spin_unlock(lock: &dquot->dq_dqb_lock);
1834 dqput(dquot);
1835 return 0;
1836}
1837#endif
1838
1839static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1840{
1841 struct super_block *sb = dentry->d_sb;
1842 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1843 u64 id = huge_encode_dev(dev: sb->s_bdev->bd_dev);
1844 block_t total_count, user_block_count, start_count;
1845 u64 avail_node_count;
1846 unsigned int total_valid_node_count;
1847
1848 total_count = le64_to_cpu(sbi->raw_super->block_count);
1849 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1850 buf->f_type = F2FS_SUPER_MAGIC;
1851 buf->f_bsize = sbi->blocksize;
1852
1853 buf->f_blocks = total_count - start_count;
1854
1855 spin_lock(lock: &sbi->stat_lock);
1856
1857 user_block_count = sbi->user_block_count;
1858 total_valid_node_count = valid_node_count(sbi);
1859 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1860 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1861 sbi->current_reserved_blocks;
1862
1863 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1864 buf->f_bfree = 0;
1865 else
1866 buf->f_bfree -= sbi->unusable_block_count;
1867 spin_unlock(lock: &sbi->stat_lock);
1868
1869 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1870 buf->f_bavail = buf->f_bfree -
1871 F2FS_OPTION(sbi).root_reserved_blocks;
1872 else
1873 buf->f_bavail = 0;
1874
1875 if (avail_node_count > user_block_count) {
1876 buf->f_files = user_block_count;
1877 buf->f_ffree = buf->f_bavail;
1878 } else {
1879 buf->f_files = avail_node_count;
1880 buf->f_ffree = min(avail_node_count - total_valid_node_count,
1881 buf->f_bavail);
1882 }
1883
1884 buf->f_namelen = F2FS_NAME_LEN;
1885 buf->f_fsid = u64_to_fsid(v: id);
1886
1887#ifdef CONFIG_QUOTA
1888 if (is_inode_flag_set(inode: dentry->d_inode, flag: FI_PROJ_INHERIT) &&
1889 sb_has_quota_limits_enabled(sb, type: PRJQUOTA)) {
1890 f2fs_statfs_project(sb, projid: F2FS_I(inode: dentry->d_inode)->i_projid, buf);
1891 }
1892#endif
1893 return 0;
1894}
1895
1896static inline void f2fs_show_quota_options(struct seq_file *seq,
1897 struct super_block *sb)
1898{
1899#ifdef CONFIG_QUOTA
1900 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1901
1902 if (F2FS_OPTION(sbi).s_jquota_fmt) {
1903 char *fmtname = "";
1904
1905 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1906 case QFMT_VFS_OLD:
1907 fmtname = "vfsold";
1908 break;
1909 case QFMT_VFS_V0:
1910 fmtname = "vfsv0";
1911 break;
1912 case QFMT_VFS_V1:
1913 fmtname = "vfsv1";
1914 break;
1915 }
1916 seq_printf(m: seq, fmt: ",jqfmt=%s", fmtname);
1917 }
1918
1919 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1920 seq_show_option(m: seq, name: "usrjquota",
1921 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1922
1923 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1924 seq_show_option(m: seq, name: "grpjquota",
1925 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1926
1927 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1928 seq_show_option(m: seq, name: "prjjquota",
1929 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1930#endif
1931}
1932
1933#ifdef CONFIG_F2FS_FS_COMPRESSION
1934static inline void f2fs_show_compress_options(struct seq_file *seq,
1935 struct super_block *sb)
1936{
1937 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1938 char *algtype = "";
1939 int i;
1940
1941 if (!f2fs_sb_has_compression(sbi))
1942 return;
1943
1944 switch (F2FS_OPTION(sbi).compress_algorithm) {
1945 case COMPRESS_LZO:
1946 algtype = "lzo";
1947 break;
1948 case COMPRESS_LZ4:
1949 algtype = "lz4";
1950 break;
1951 case COMPRESS_ZSTD:
1952 algtype = "zstd";
1953 break;
1954 case COMPRESS_LZORLE:
1955 algtype = "lzo-rle";
1956 break;
1957 }
1958 seq_printf(m: seq, fmt: ",compress_algorithm=%s", algtype);
1959
1960 if (F2FS_OPTION(sbi).compress_level)
1961 seq_printf(m: seq, fmt: ":%d", F2FS_OPTION(sbi).compress_level);
1962
1963 seq_printf(m: seq, fmt: ",compress_log_size=%u",
1964 F2FS_OPTION(sbi).compress_log_size);
1965
1966 for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1967 seq_printf(m: seq, fmt: ",compress_extension=%s",
1968 F2FS_OPTION(sbi).extensions[i]);
1969 }
1970
1971 for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1972 seq_printf(m: seq, fmt: ",nocompress_extension=%s",
1973 F2FS_OPTION(sbi).noextensions[i]);
1974 }
1975
1976 if (F2FS_OPTION(sbi).compress_chksum)
1977 seq_puts(m: seq, s: ",compress_chksum");
1978
1979 if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1980 seq_printf(m: seq, fmt: ",compress_mode=%s", "fs");
1981 else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1982 seq_printf(m: seq, fmt: ",compress_mode=%s", "user");
1983
1984 if (test_opt(sbi, COMPRESS_CACHE))
1985 seq_puts(m: seq, s: ",compress_cache");
1986}
1987#endif
1988
1989static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1990{
1991 struct f2fs_sb_info *sbi = F2FS_SB(sb: root->d_sb);
1992
1993 if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1994 seq_printf(m: seq, fmt: ",background_gc=%s", "sync");
1995 else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1996 seq_printf(m: seq, fmt: ",background_gc=%s", "on");
1997 else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1998 seq_printf(m: seq, fmt: ",background_gc=%s", "off");
1999
2000 if (test_opt(sbi, GC_MERGE))
2001 seq_puts(m: seq, s: ",gc_merge");
2002 else
2003 seq_puts(m: seq, s: ",nogc_merge");
2004
2005 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2006 seq_puts(m: seq, s: ",disable_roll_forward");
2007 if (test_opt(sbi, NORECOVERY))
2008 seq_puts(m: seq, s: ",norecovery");
2009 if (test_opt(sbi, DISCARD)) {
2010 seq_puts(m: seq, s: ",discard");
2011 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2012 seq_printf(m: seq, fmt: ",discard_unit=%s", "block");
2013 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2014 seq_printf(m: seq, fmt: ",discard_unit=%s", "segment");
2015 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2016 seq_printf(m: seq, fmt: ",discard_unit=%s", "section");
2017 } else {
2018 seq_puts(m: seq, s: ",nodiscard");
2019 }
2020 if (test_opt(sbi, NOHEAP))
2021 seq_puts(m: seq, s: ",no_heap");
2022 else
2023 seq_puts(m: seq, s: ",heap");
2024#ifdef CONFIG_F2FS_FS_XATTR
2025 if (test_opt(sbi, XATTR_USER))
2026 seq_puts(m: seq, s: ",user_xattr");
2027 else
2028 seq_puts(m: seq, s: ",nouser_xattr");
2029 if (test_opt(sbi, INLINE_XATTR))
2030 seq_puts(m: seq, s: ",inline_xattr");
2031 else
2032 seq_puts(m: seq, s: ",noinline_xattr");
2033 if (test_opt(sbi, INLINE_XATTR_SIZE))
2034 seq_printf(m: seq, fmt: ",inline_xattr_size=%u",
2035 F2FS_OPTION(sbi).inline_xattr_size);
2036#endif
2037#ifdef CONFIG_F2FS_FS_POSIX_ACL
2038 if (test_opt(sbi, POSIX_ACL))
2039 seq_puts(m: seq, s: ",acl");
2040 else
2041 seq_puts(m: seq, s: ",noacl");
2042#endif
2043 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
2044 seq_puts(m: seq, s: ",disable_ext_identify");
2045 if (test_opt(sbi, INLINE_DATA))
2046 seq_puts(m: seq, s: ",inline_data");
2047 else
2048 seq_puts(m: seq, s: ",noinline_data");
2049 if (test_opt(sbi, INLINE_DENTRY))
2050 seq_puts(m: seq, s: ",inline_dentry");
2051 else
2052 seq_puts(m: seq, s: ",noinline_dentry");
2053 if (test_opt(sbi, FLUSH_MERGE))
2054 seq_puts(m: seq, s: ",flush_merge");
2055 else
2056 seq_puts(m: seq, s: ",noflush_merge");
2057 if (test_opt(sbi, NOBARRIER))
2058 seq_puts(m: seq, s: ",nobarrier");
2059 else
2060 seq_puts(m: seq, s: ",barrier");
2061 if (test_opt(sbi, FASTBOOT))
2062 seq_puts(m: seq, s: ",fastboot");
2063 if (test_opt(sbi, READ_EXTENT_CACHE))
2064 seq_puts(m: seq, s: ",extent_cache");
2065 else
2066 seq_puts(m: seq, s: ",noextent_cache");
2067 if (test_opt(sbi, AGE_EXTENT_CACHE))
2068 seq_puts(m: seq, s: ",age_extent_cache");
2069 if (test_opt(sbi, DATA_FLUSH))
2070 seq_puts(m: seq, s: ",data_flush");
2071
2072 seq_puts(m: seq, s: ",mode=");
2073 if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
2074 seq_puts(m: seq, s: "adaptive");
2075 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
2076 seq_puts(m: seq, s: "lfs");
2077 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
2078 seq_puts(m: seq, s: "fragment:segment");
2079 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
2080 seq_puts(m: seq, s: "fragment:block");
2081 seq_printf(m: seq, fmt: ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
2082 if (test_opt(sbi, RESERVE_ROOT))
2083 seq_printf(m: seq, fmt: ",reserve_root=%u,resuid=%u,resgid=%u",
2084 F2FS_OPTION(sbi).root_reserved_blocks,
2085 from_kuid_munged(to: &init_user_ns,
2086 F2FS_OPTION(sbi).s_resuid),
2087 from_kgid_munged(to: &init_user_ns,
2088 F2FS_OPTION(sbi).s_resgid));
2089 if (F2FS_IO_SIZE_BITS(sbi))
2090 seq_printf(m: seq, fmt: ",io_bits=%u",
2091 F2FS_OPTION(sbi).write_io_size_bits);
2092#ifdef CONFIG_F2FS_FAULT_INJECTION
2093 if (test_opt(sbi, FAULT_INJECTION)) {
2094 seq_printf(m: seq, fmt: ",fault_injection=%u",
2095 F2FS_OPTION(sbi).fault_info.inject_rate);
2096 seq_printf(m: seq, fmt: ",fault_type=%u",
2097 F2FS_OPTION(sbi).fault_info.inject_type);
2098 }
2099#endif
2100#ifdef CONFIG_QUOTA
2101 if (test_opt(sbi, QUOTA))
2102 seq_puts(m: seq, s: ",quota");
2103 if (test_opt(sbi, USRQUOTA))
2104 seq_puts(m: seq, s: ",usrquota");
2105 if (test_opt(sbi, GRPQUOTA))
2106 seq_puts(m: seq, s: ",grpquota");
2107 if (test_opt(sbi, PRJQUOTA))
2108 seq_puts(m: seq, s: ",prjquota");
2109#endif
2110 f2fs_show_quota_options(seq, sb: sbi->sb);
2111
2112 fscrypt_show_test_dummy_encryption(seq, sep: ',', sb: sbi->sb);
2113
2114 if (sbi->sb->s_flags & SB_INLINECRYPT)
2115 seq_puts(m: seq, s: ",inlinecrypt");
2116
2117 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2118 seq_printf(m: seq, fmt: ",alloc_mode=%s", "default");
2119 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2120 seq_printf(m: seq, fmt: ",alloc_mode=%s", "reuse");
2121
2122 if (test_opt(sbi, DISABLE_CHECKPOINT))
2123 seq_printf(m: seq, fmt: ",checkpoint=disable:%u",
2124 F2FS_OPTION(sbi).unusable_cap);
2125 if (test_opt(sbi, MERGE_CHECKPOINT))
2126 seq_puts(m: seq, s: ",checkpoint_merge");
2127 else
2128 seq_puts(m: seq, s: ",nocheckpoint_merge");
2129 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2130 seq_printf(m: seq, fmt: ",fsync_mode=%s", "posix");
2131 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2132 seq_printf(m: seq, fmt: ",fsync_mode=%s", "strict");
2133 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2134 seq_printf(m: seq, fmt: ",fsync_mode=%s", "nobarrier");
2135
2136#ifdef CONFIG_F2FS_FS_COMPRESSION
2137 f2fs_show_compress_options(seq, sb: sbi->sb);
2138#endif
2139
2140 if (test_opt(sbi, ATGC))
2141 seq_puts(m: seq, s: ",atgc");
2142
2143 if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2144 seq_printf(m: seq, fmt: ",memory=%s", "normal");
2145 else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2146 seq_printf(m: seq, fmt: ",memory=%s", "low");
2147
2148 if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_READONLY)
2149 seq_printf(m: seq, fmt: ",errors=%s", "remount-ro");
2150 else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE)
2151 seq_printf(m: seq, fmt: ",errors=%s", "continue");
2152 else if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC)
2153 seq_printf(m: seq, fmt: ",errors=%s", "panic");
2154
2155 return 0;
2156}
2157
2158static void default_options(struct f2fs_sb_info *sbi, bool remount)
2159{
2160 /* init some FS parameters */
2161 if (!remount) {
2162 set_opt(sbi, READ_EXTENT_CACHE);
2163 clear_opt(sbi, DISABLE_CHECKPOINT);
2164
2165 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2166 set_opt(sbi, DISCARD);
2167
2168 if (f2fs_sb_has_blkzoned(sbi))
2169 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2170 else
2171 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2172 }
2173
2174 if (f2fs_sb_has_readonly(sbi))
2175 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2176 else
2177 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2178
2179 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2180 if (le32_to_cpu(F2FS_RAW_SUPER(sbi)->segment_count_main) <=
2181 SMALL_VOLUME_SEGMENTS)
2182 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
2183 else
2184 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2185 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2186 F2FS_OPTION(sbi).s_resuid = make_kuid(from: &init_user_ns, F2FS_DEF_RESUID);
2187 F2FS_OPTION(sbi).s_resgid = make_kgid(from: &init_user_ns, F2FS_DEF_RESGID);
2188 if (f2fs_sb_has_compression(sbi)) {
2189 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2190 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2191 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2192 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2193 }
2194 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2195 F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2196 F2FS_OPTION(sbi).errors = MOUNT_ERRORS_CONTINUE;
2197
2198 sbi->sb->s_flags &= ~SB_INLINECRYPT;
2199
2200 set_opt(sbi, INLINE_XATTR);
2201 set_opt(sbi, INLINE_DATA);
2202 set_opt(sbi, INLINE_DENTRY);
2203 set_opt(sbi, NOHEAP);
2204 set_opt(sbi, MERGE_CHECKPOINT);
2205 F2FS_OPTION(sbi).unusable_cap = 0;
2206 sbi->sb->s_flags |= SB_LAZYTIME;
2207 if (!f2fs_is_readonly(sbi))
2208 set_opt(sbi, FLUSH_MERGE);
2209 if (f2fs_sb_has_blkzoned(sbi))
2210 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2211 else
2212 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2213
2214#ifdef CONFIG_F2FS_FS_XATTR
2215 set_opt(sbi, XATTR_USER);
2216#endif
2217#ifdef CONFIG_F2FS_FS_POSIX_ACL
2218 set_opt(sbi, POSIX_ACL);
2219#endif
2220
2221 f2fs_build_fault_attr(sbi, rate: 0, type: 0);
2222}
2223
2224#ifdef CONFIG_QUOTA
2225static int f2fs_enable_quotas(struct super_block *sb);
2226#endif
2227
2228static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2229{
2230 unsigned int s_flags = sbi->sb->s_flags;
2231 struct cp_control cpc;
2232 unsigned int gc_mode = sbi->gc_mode;
2233 int err = 0;
2234 int ret;
2235 block_t unusable;
2236
2237 if (s_flags & SB_RDONLY) {
2238 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2239 return -EINVAL;
2240 }
2241 sbi->sb->s_flags |= SB_ACTIVE;
2242
2243 /* check if we need more GC first */
2244 unusable = f2fs_get_unusable_blocks(sbi);
2245 if (!f2fs_disable_cp_again(sbi, unusable))
2246 goto skip_gc;
2247
2248 f2fs_update_time(sbi, type: DISABLE_TIME);
2249
2250 sbi->gc_mode = GC_URGENT_HIGH;
2251
2252 while (!f2fs_time_over(sbi, type: DISABLE_TIME)) {
2253 struct f2fs_gc_control gc_control = {
2254 .victim_segno = NULL_SEGNO,
2255 .init_gc_type = FG_GC,
2256 .should_migrate_blocks = false,
2257 .err_gc_skipped = true,
2258 .nr_free_secs = 1 };
2259
2260 f2fs_down_write(sem: &sbi->gc_lock);
2261 stat_inc_gc_call_count(sbi, FOREGROUND);
2262 err = f2fs_gc(sbi, gc_control: &gc_control);
2263 if (err == -ENODATA) {
2264 err = 0;
2265 break;
2266 }
2267 if (err && err != -EAGAIN)
2268 break;
2269 }
2270
2271 ret = sync_filesystem(sbi->sb);
2272 if (ret || err) {
2273 err = ret ? ret : err;
2274 goto restore_flag;
2275 }
2276
2277 unusable = f2fs_get_unusable_blocks(sbi);
2278 if (f2fs_disable_cp_again(sbi, unusable)) {
2279 err = -EAGAIN;
2280 goto restore_flag;
2281 }
2282
2283skip_gc:
2284 f2fs_down_write(sem: &sbi->gc_lock);
2285 cpc.reason = CP_PAUSE;
2286 set_sbi_flag(sbi, type: SBI_CP_DISABLED);
2287 stat_inc_cp_call_count(sbi, TOTAL_CALL);
2288 err = f2fs_write_checkpoint(sbi, cpc: &cpc);
2289 if (err)
2290 goto out_unlock;
2291
2292 spin_lock(lock: &sbi->stat_lock);
2293 sbi->unusable_block_count = unusable;
2294 spin_unlock(lock: &sbi->stat_lock);
2295
2296out_unlock:
2297 f2fs_up_write(sem: &sbi->gc_lock);
2298restore_flag:
2299 sbi->gc_mode = gc_mode;
2300 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
2301 return err;
2302}
2303
2304static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2305{
2306 int retry = DEFAULT_RETRY_IO_COUNT;
2307
2308 /* we should flush all the data to keep data consistency */
2309 do {
2310 sync_inodes_sb(sbi->sb);
2311 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2312 } while (get_pages(sbi, count_type: F2FS_DIRTY_DATA) && retry--);
2313
2314 if (unlikely(retry < 0))
2315 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2316
2317 f2fs_down_write(sem: &sbi->gc_lock);
2318 f2fs_dirty_to_prefree(sbi);
2319
2320 clear_sbi_flag(sbi, type: SBI_CP_DISABLED);
2321 set_sbi_flag(sbi, type: SBI_IS_DIRTY);
2322 f2fs_up_write(sem: &sbi->gc_lock);
2323
2324 f2fs_sync_fs(sb: sbi->sb, sync: 1);
2325
2326 /* Let's ensure there's no pending checkpoint anymore */
2327 f2fs_flush_ckpt_thread(sbi);
2328}
2329
2330static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2331{
2332 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2333 struct f2fs_mount_info org_mount_opt;
2334 unsigned long old_sb_flags;
2335 int err;
2336 bool need_restart_gc = false, need_stop_gc = false;
2337 bool need_restart_flush = false, need_stop_flush = false;
2338 bool need_restart_discard = false, need_stop_discard = false;
2339 bool need_enable_checkpoint = false, need_disable_checkpoint = false;
2340 bool no_read_extent_cache = !test_opt(sbi, READ_EXTENT_CACHE);
2341 bool no_age_extent_cache = !test_opt(sbi, AGE_EXTENT_CACHE);
2342 bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2343 bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2344 bool no_atgc = !test_opt(sbi, ATGC);
2345 bool no_discard = !test_opt(sbi, DISCARD);
2346 bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2347 bool block_unit_discard = f2fs_block_unit_discard(sbi);
2348#ifdef CONFIG_QUOTA
2349 int i, j;
2350#endif
2351
2352 /*
2353 * Save the old mount options in case we
2354 * need to restore them.
2355 */
2356 org_mount_opt = sbi->mount_opt;
2357 old_sb_flags = sb->s_flags;
2358
2359#ifdef CONFIG_QUOTA
2360 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2361 for (i = 0; i < MAXQUOTAS; i++) {
2362 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2363 org_mount_opt.s_qf_names[i] =
2364 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2365 GFP_KERNEL);
2366 if (!org_mount_opt.s_qf_names[i]) {
2367 for (j = 0; j < i; j++)
2368 kfree(objp: org_mount_opt.s_qf_names[j]);
2369 return -ENOMEM;
2370 }
2371 } else {
2372 org_mount_opt.s_qf_names[i] = NULL;
2373 }
2374 }
2375#endif
2376
2377 /* recover superblocks we couldn't write due to previous RO mount */
2378 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, type: SBI_NEED_SB_WRITE)) {
2379 err = f2fs_commit_super(sbi, recover: false);
2380 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2381 err);
2382 if (!err)
2383 clear_sbi_flag(sbi, type: SBI_NEED_SB_WRITE);
2384 }
2385
2386 default_options(sbi, remount: true);
2387
2388 /* parse mount options */
2389 err = parse_options(sb, options: data, is_remount: true);
2390 if (err)
2391 goto restore_opts;
2392
2393 /* flush outstanding errors before changing fs state */
2394 flush_work(work: &sbi->s_error_work);
2395
2396 /*
2397 * Previous and new state of filesystem is RO,
2398 * so skip checking GC and FLUSH_MERGE conditions.
2399 */
2400 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2401 goto skip;
2402
2403 if (f2fs_dev_is_readonly(sbi) && !(*flags & SB_RDONLY)) {
2404 err = -EROFS;
2405 goto restore_opts;
2406 }
2407
2408#ifdef CONFIG_QUOTA
2409 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2410 err = dquot_suspend(sb, type: -1);
2411 if (err < 0)
2412 goto restore_opts;
2413 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2414 /* dquot_resume needs RW */
2415 sb->s_flags &= ~SB_RDONLY;
2416 if (sb_any_quota_suspended(sb)) {
2417 dquot_resume(sb, type: -1);
2418 } else if (f2fs_sb_has_quota_ino(sbi)) {
2419 err = f2fs_enable_quotas(sb);
2420 if (err)
2421 goto restore_opts;
2422 }
2423 }
2424#endif
2425 if (f2fs_lfs_mode(sbi) && !IS_F2FS_IPU_DISABLE(sbi)) {
2426 err = -EINVAL;
2427 f2fs_warn(sbi, "LFS is not compatible with IPU");
2428 goto restore_opts;
2429 }
2430
2431 /* disallow enable atgc dynamically */
2432 if (no_atgc == !!test_opt(sbi, ATGC)) {
2433 err = -EINVAL;
2434 f2fs_warn(sbi, "switch atgc option is not allowed");
2435 goto restore_opts;
2436 }
2437
2438 /* disallow enable/disable extent_cache dynamically */
2439 if (no_read_extent_cache == !!test_opt(sbi, READ_EXTENT_CACHE)) {
2440 err = -EINVAL;
2441 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2442 goto restore_opts;
2443 }
2444 /* disallow enable/disable age extent_cache dynamically */
2445 if (no_age_extent_cache == !!test_opt(sbi, AGE_EXTENT_CACHE)) {
2446 err = -EINVAL;
2447 f2fs_warn(sbi, "switch age_extent_cache option is not allowed");
2448 goto restore_opts;
2449 }
2450
2451 if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2452 err = -EINVAL;
2453 f2fs_warn(sbi, "switch io_bits option is not allowed");
2454 goto restore_opts;
2455 }
2456
2457 if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2458 err = -EINVAL;
2459 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2460 goto restore_opts;
2461 }
2462
2463 if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2464 err = -EINVAL;
2465 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2466 goto restore_opts;
2467 }
2468
2469 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2470 err = -EINVAL;
2471 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2472 goto restore_opts;
2473 }
2474
2475 /*
2476 * We stop the GC thread if FS is mounted as RO
2477 * or if background_gc = off is passed in mount
2478 * option. Also sync the filesystem.
2479 */
2480 if ((*flags & SB_RDONLY) ||
2481 (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2482 !test_opt(sbi, GC_MERGE))) {
2483 if (sbi->gc_thread) {
2484 f2fs_stop_gc_thread(sbi);
2485 need_restart_gc = true;
2486 }
2487 } else if (!sbi->gc_thread) {
2488 err = f2fs_start_gc_thread(sbi);
2489 if (err)
2490 goto restore_opts;
2491 need_stop_gc = true;
2492 }
2493
2494 if (*flags & SB_RDONLY) {
2495 sync_inodes_sb(sb);
2496
2497 set_sbi_flag(sbi, type: SBI_IS_DIRTY);
2498 set_sbi_flag(sbi, type: SBI_IS_CLOSE);
2499 f2fs_sync_fs(sb, sync: 1);
2500 clear_sbi_flag(sbi, type: SBI_IS_CLOSE);
2501 }
2502
2503 /*
2504 * We stop issue flush thread if FS is mounted as RO
2505 * or if flush_merge is not passed in mount option.
2506 */
2507 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2508 clear_opt(sbi, FLUSH_MERGE);
2509 f2fs_destroy_flush_cmd_control(sbi, free: false);
2510 need_restart_flush = true;
2511 } else {
2512 err = f2fs_create_flush_cmd_control(sbi);
2513 if (err)
2514 goto restore_gc;
2515 need_stop_flush = true;
2516 }
2517
2518 if (no_discard == !!test_opt(sbi, DISCARD)) {
2519 if (test_opt(sbi, DISCARD)) {
2520 err = f2fs_start_discard_thread(sbi);
2521 if (err)
2522 goto restore_flush;
2523 need_stop_discard = true;
2524 } else {
2525 f2fs_stop_discard_thread(sbi);
2526 f2fs_issue_discard_timeout(sbi);
2527 need_restart_discard = true;
2528 }
2529 }
2530
2531 if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2532 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2533 err = f2fs_disable_checkpoint(sbi);
2534 if (err)
2535 goto restore_discard;
2536 need_enable_checkpoint = true;
2537 } else {
2538 f2fs_enable_checkpoint(sbi);
2539 need_disable_checkpoint = true;
2540 }
2541 }
2542
2543 /*
2544 * Place this routine at the end, since a new checkpoint would be
2545 * triggered while remount and we need to take care of it before
2546 * returning from remount.
2547 */
2548 if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2549 !test_opt(sbi, MERGE_CHECKPOINT)) {
2550 f2fs_stop_ckpt_thread(sbi);
2551 } else {
2552 /* Flush if the prevous checkpoint, if exists. */
2553 f2fs_flush_ckpt_thread(sbi);
2554
2555 err = f2fs_start_ckpt_thread(sbi);
2556 if (err) {
2557 f2fs_err(sbi,
2558 "Failed to start F2FS issue_checkpoint_thread (%d)",
2559 err);
2560 goto restore_checkpoint;
2561 }
2562 }
2563
2564skip:
2565#ifdef CONFIG_QUOTA
2566 /* Release old quota file names */
2567 for (i = 0; i < MAXQUOTAS; i++)
2568 kfree(objp: org_mount_opt.s_qf_names[i]);
2569#endif
2570 /* Update the POSIXACL Flag */
2571 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2572 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2573
2574 limit_reserve_root(sbi);
2575 adjust_unusable_cap_perc(sbi);
2576 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2577 return 0;
2578restore_checkpoint:
2579 if (need_enable_checkpoint) {
2580 f2fs_enable_checkpoint(sbi);
2581 } else if (need_disable_checkpoint) {
2582 if (f2fs_disable_checkpoint(sbi))
2583 f2fs_warn(sbi, "checkpoint has not been disabled");
2584 }
2585restore_discard:
2586 if (need_restart_discard) {
2587 if (f2fs_start_discard_thread(sbi))
2588 f2fs_warn(sbi, "discard has been stopped");
2589 } else if (need_stop_discard) {
2590 f2fs_stop_discard_thread(sbi);
2591 }
2592restore_flush:
2593 if (need_restart_flush) {
2594 if (f2fs_create_flush_cmd_control(sbi))
2595 f2fs_warn(sbi, "background flush thread has stopped");
2596 } else if (need_stop_flush) {
2597 clear_opt(sbi, FLUSH_MERGE);
2598 f2fs_destroy_flush_cmd_control(sbi, free: false);
2599 }
2600restore_gc:
2601 if (need_restart_gc) {
2602 if (f2fs_start_gc_thread(sbi))
2603 f2fs_warn(sbi, "background gc thread has stopped");
2604 } else if (need_stop_gc) {
2605 f2fs_stop_gc_thread(sbi);
2606 }
2607restore_opts:
2608#ifdef CONFIG_QUOTA
2609 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2610 for (i = 0; i < MAXQUOTAS; i++) {
2611 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2612 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2613 }
2614#endif
2615 sbi->mount_opt = org_mount_opt;
2616 sb->s_flags = old_sb_flags;
2617 return err;
2618}
2619
2620#ifdef CONFIG_QUOTA
2621static bool f2fs_need_recovery(struct f2fs_sb_info *sbi)
2622{
2623 /* need to recovery orphan */
2624 if (is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
2625 return true;
2626 /* need to recovery data */
2627 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
2628 return false;
2629 if (test_opt(sbi, NORECOVERY))
2630 return false;
2631 return !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG);
2632}
2633
2634static bool f2fs_recover_quota_begin(struct f2fs_sb_info *sbi)
2635{
2636 bool readonly = f2fs_readonly(sb: sbi->sb);
2637
2638 if (!f2fs_need_recovery(sbi))
2639 return false;
2640
2641 /* it doesn't need to check f2fs_sb_has_readonly() */
2642 if (f2fs_hw_is_readonly(sbi))
2643 return false;
2644
2645 if (readonly) {
2646 sbi->sb->s_flags &= ~SB_RDONLY;
2647 set_sbi_flag(sbi, type: SBI_IS_WRITABLE);
2648 }
2649
2650 /*
2651 * Turn on quotas which were not enabled for read-only mounts if
2652 * filesystem has quota feature, so that they are updated correctly.
2653 */
2654 return f2fs_enable_quota_files(sbi, rdonly: readonly);
2655}
2656
2657static void f2fs_recover_quota_end(struct f2fs_sb_info *sbi,
2658 bool quota_enabled)
2659{
2660 if (quota_enabled)
2661 f2fs_quota_off_umount(sb: sbi->sb);
2662
2663 if (is_sbi_flag_set(sbi, type: SBI_IS_WRITABLE)) {
2664 clear_sbi_flag(sbi, type: SBI_IS_WRITABLE);
2665 sbi->sb->s_flags |= SB_RDONLY;
2666 }
2667}
2668
2669/* Read data from quotafile */
2670static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2671 size_t len, loff_t off)
2672{
2673 struct inode *inode = sb_dqopt(sb)->files[type];
2674 struct address_space *mapping = inode->i_mapping;
2675 block_t blkidx = F2FS_BYTES_TO_BLK(off);
2676 int offset = off & (sb->s_blocksize - 1);
2677 int tocopy;
2678 size_t toread;
2679 loff_t i_size = i_size_read(inode);
2680 struct page *page;
2681
2682 if (off > i_size)
2683 return 0;
2684
2685 if (off + len > i_size)
2686 len = i_size - off;
2687 toread = len;
2688 while (toread > 0) {
2689 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2690repeat:
2691 page = read_cache_page_gfp(mapping, index: blkidx, GFP_NOFS);
2692 if (IS_ERR(ptr: page)) {
2693 if (PTR_ERR(ptr: page) == -ENOMEM) {
2694 memalloc_retry_wait(GFP_NOFS);
2695 goto repeat;
2696 }
2697 set_sbi_flag(sbi: F2FS_SB(sb), type: SBI_QUOTA_NEED_REPAIR);
2698 return PTR_ERR(ptr: page);
2699 }
2700
2701 lock_page(page);
2702
2703 if (unlikely(page->mapping != mapping)) {
2704 f2fs_put_page(page, unlock: 1);
2705 goto repeat;
2706 }
2707 if (unlikely(!PageUptodate(page))) {
2708 f2fs_put_page(page, unlock: 1);
2709 set_sbi_flag(sbi: F2FS_SB(sb), type: SBI_QUOTA_NEED_REPAIR);
2710 return -EIO;
2711 }
2712
2713 memcpy_from_page(to: data, page, offset, len: tocopy);
2714 f2fs_put_page(page, unlock: 1);
2715
2716 offset = 0;
2717 toread -= tocopy;
2718 data += tocopy;
2719 blkidx++;
2720 }
2721 return len;
2722}
2723
2724/* Write to quotafile */
2725static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2726 const char *data, size_t len, loff_t off)
2727{
2728 struct inode *inode = sb_dqopt(sb)->files[type];
2729 struct address_space *mapping = inode->i_mapping;
2730 const struct address_space_operations *a_ops = mapping->a_ops;
2731 int offset = off & (sb->s_blocksize - 1);
2732 size_t towrite = len;
2733 struct page *page;
2734 void *fsdata = NULL;
2735 int err = 0;
2736 int tocopy;
2737
2738 while (towrite > 0) {
2739 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2740 towrite);
2741retry:
2742 err = a_ops->write_begin(NULL, mapping, off, tocopy,
2743 &page, &fsdata);
2744 if (unlikely(err)) {
2745 if (err == -ENOMEM) {
2746 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2747 goto retry;
2748 }
2749 set_sbi_flag(sbi: F2FS_SB(sb), type: SBI_QUOTA_NEED_REPAIR);
2750 break;
2751 }
2752
2753 memcpy_to_page(page, offset, from: data, len: tocopy);
2754
2755 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2756 page, fsdata);
2757 offset = 0;
2758 towrite -= tocopy;
2759 off += tocopy;
2760 data += tocopy;
2761 cond_resched();
2762 }
2763
2764 if (len == towrite)
2765 return err;
2766 inode_set_mtime_to_ts(inode, ts: inode_set_ctime_current(inode));
2767 f2fs_mark_inode_dirty_sync(inode, sync: false);
2768 return len - towrite;
2769}
2770
2771int f2fs_dquot_initialize(struct inode *inode)
2772{
2773 if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT))
2774 return -ESRCH;
2775
2776 return dquot_initialize(inode);
2777}
2778
2779static struct dquot **f2fs_get_dquots(struct inode *inode)
2780{
2781 return F2FS_I(inode)->i_dquot;
2782}
2783
2784static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2785{
2786 return &F2FS_I(inode)->i_reserved_quota;
2787}
2788
2789static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2790{
2791 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2792 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2793 return 0;
2794 }
2795
2796 return dquot_quota_on_mount(sb: sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2797 F2FS_OPTION(sbi).s_jquota_fmt, type);
2798}
2799
2800int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2801{
2802 int enabled = 0;
2803 int i, err;
2804
2805 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2806 err = f2fs_enable_quotas(sb: sbi->sb);
2807 if (err) {
2808 f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2809 return 0;
2810 }
2811 return 1;
2812 }
2813
2814 for (i = 0; i < MAXQUOTAS; i++) {
2815 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2816 err = f2fs_quota_on_mount(sbi, type: i);
2817 if (!err) {
2818 enabled = 1;
2819 continue;
2820 }
2821 f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2822 err, i);
2823 }
2824 }
2825 return enabled;
2826}
2827
2828static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2829 unsigned int flags)
2830{
2831 struct inode *qf_inode;
2832 unsigned long qf_inum;
2833 unsigned long qf_flag = F2FS_QUOTA_DEFAULT_FL;
2834 int err;
2835
2836 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2837
2838 qf_inum = f2fs_qf_ino(sb, type);
2839 if (!qf_inum)
2840 return -EPERM;
2841
2842 qf_inode = f2fs_iget(sb, ino: qf_inum);
2843 if (IS_ERR(ptr: qf_inode)) {
2844 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2845 return PTR_ERR(ptr: qf_inode);
2846 }
2847
2848 /* Don't account quota for quota files to avoid recursion */
2849 inode_lock(inode: qf_inode);
2850 qf_inode->i_flags |= S_NOQUOTA;
2851
2852 if ((F2FS_I(inode: qf_inode)->i_flags & qf_flag) != qf_flag) {
2853 F2FS_I(inode: qf_inode)->i_flags |= qf_flag;
2854 f2fs_set_inode_flags(inode: qf_inode);
2855 }
2856 inode_unlock(inode: qf_inode);
2857
2858 err = dquot_load_quota_inode(inode: qf_inode, type, format_id, flags);
2859 iput(qf_inode);
2860 return err;
2861}
2862
2863static int f2fs_enable_quotas(struct super_block *sb)
2864{
2865 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2866 int type, err = 0;
2867 unsigned long qf_inum;
2868 bool quota_mopt[MAXQUOTAS] = {
2869 test_opt(sbi, USRQUOTA),
2870 test_opt(sbi, GRPQUOTA),
2871 test_opt(sbi, PRJQUOTA),
2872 };
2873
2874 if (is_set_ckpt_flags(sbi: F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2875 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2876 return 0;
2877 }
2878
2879 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2880
2881 for (type = 0; type < MAXQUOTAS; type++) {
2882 qf_inum = f2fs_qf_ino(sb, type);
2883 if (qf_inum) {
2884 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2885 DQUOT_USAGE_ENABLED |
2886 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2887 if (err) {
2888 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2889 type, err);
2890 for (type--; type >= 0; type--)
2891 dquot_quota_off(sb, type);
2892 set_sbi_flag(sbi: F2FS_SB(sb),
2893 type: SBI_QUOTA_NEED_REPAIR);
2894 return err;
2895 }
2896 }
2897 }
2898 return 0;
2899}
2900
2901static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2902{
2903 struct quota_info *dqopt = sb_dqopt(sb: sbi->sb);
2904 struct address_space *mapping = dqopt->files[type]->i_mapping;
2905 int ret = 0;
2906
2907 ret = dquot_writeback_dquots(sb: sbi->sb, type);
2908 if (ret)
2909 goto out;
2910
2911 ret = filemap_fdatawrite(mapping);
2912 if (ret)
2913 goto out;
2914
2915 /* if we are using journalled quota */
2916 if (is_journalled_quota(sbi))
2917 goto out;
2918
2919 ret = filemap_fdatawait(mapping);
2920
2921 truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2922out:
2923 if (ret)
2924 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
2925 return ret;
2926}
2927
2928int f2fs_quota_sync(struct super_block *sb, int type)
2929{
2930 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2931 struct quota_info *dqopt = sb_dqopt(sb);
2932 int cnt;
2933 int ret = 0;
2934
2935 /*
2936 * Now when everything is written we can discard the pagecache so
2937 * that userspace sees the changes.
2938 */
2939 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2940
2941 if (type != -1 && cnt != type)
2942 continue;
2943
2944 if (!sb_has_quota_active(sb, type: cnt))
2945 continue;
2946
2947 if (!f2fs_sb_has_quota_ino(sbi))
2948 inode_lock(inode: dqopt->files[cnt]);
2949
2950 /*
2951 * do_quotactl
2952 * f2fs_quota_sync
2953 * f2fs_down_read(quota_sem)
2954 * dquot_writeback_dquots()
2955 * f2fs_dquot_commit
2956 * block_operation
2957 * f2fs_down_read(quota_sem)
2958 */
2959 f2fs_lock_op(sbi);
2960 f2fs_down_read(sem: &sbi->quota_sem);
2961
2962 ret = f2fs_quota_sync_file(sbi, type: cnt);
2963
2964 f2fs_up_read(sem: &sbi->quota_sem);
2965 f2fs_unlock_op(sbi);
2966
2967 if (!f2fs_sb_has_quota_ino(sbi))
2968 inode_unlock(inode: dqopt->files[cnt]);
2969
2970 if (ret)
2971 break;
2972 }
2973 return ret;
2974}
2975
2976static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2977 const struct path *path)
2978{
2979 struct inode *inode;
2980 int err;
2981
2982 /* if quota sysfile exists, deny enabling quota with specific file */
2983 if (f2fs_sb_has_quota_ino(sbi: F2FS_SB(sb))) {
2984 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2985 return -EBUSY;
2986 }
2987
2988 if (path->dentry->d_sb != sb)
2989 return -EXDEV;
2990
2991 err = f2fs_quota_sync(sb, type);
2992 if (err)
2993 return err;
2994
2995 inode = d_inode(dentry: path->dentry);
2996
2997 err = filemap_fdatawrite(inode->i_mapping);
2998 if (err)
2999 return err;
3000
3001 err = filemap_fdatawait(mapping: inode->i_mapping);
3002 if (err)
3003 return err;
3004
3005 err = dquot_quota_on(sb, type, format_id, path);
3006 if (err)
3007 return err;
3008
3009 inode_lock(inode);
3010 F2FS_I(inode)->i_flags |= F2FS_QUOTA_DEFAULT_FL;
3011 f2fs_set_inode_flags(inode);
3012 inode_unlock(inode);
3013 f2fs_mark_inode_dirty_sync(inode, sync: false);
3014
3015 return 0;
3016}
3017
3018static int __f2fs_quota_off(struct super_block *sb, int type)
3019{
3020 struct inode *inode = sb_dqopt(sb)->files[type];
3021 int err;
3022
3023 if (!inode || !igrab(inode))
3024 return dquot_quota_off(sb, type);
3025
3026 err = f2fs_quota_sync(sb, type);
3027 if (err)
3028 goto out_put;
3029
3030 err = dquot_quota_off(sb, type);
3031 if (err || f2fs_sb_has_quota_ino(sbi: F2FS_SB(sb)))
3032 goto out_put;
3033
3034 inode_lock(inode);
3035 F2FS_I(inode)->i_flags &= ~F2FS_QUOTA_DEFAULT_FL;
3036 f2fs_set_inode_flags(inode);
3037 inode_unlock(inode);
3038 f2fs_mark_inode_dirty_sync(inode, sync: false);
3039out_put:
3040 iput(inode);
3041 return err;
3042}
3043
3044static int f2fs_quota_off(struct super_block *sb, int type)
3045{
3046 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3047 int err;
3048
3049 err = __f2fs_quota_off(sb, type);
3050
3051 /*
3052 * quotactl can shutdown journalled quota, result in inconsistence
3053 * between quota record and fs data by following updates, tag the
3054 * flag to let fsck be aware of it.
3055 */
3056 if (is_journalled_quota(sbi))
3057 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
3058 return err;
3059}
3060
3061void f2fs_quota_off_umount(struct super_block *sb)
3062{
3063 int type;
3064 int err;
3065
3066 for (type = 0; type < MAXQUOTAS; type++) {
3067 err = __f2fs_quota_off(sb, type);
3068 if (err) {
3069 int ret = dquot_quota_off(sb, type);
3070
3071 f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
3072 type, err, ret);
3073 set_sbi_flag(sbi: F2FS_SB(sb), type: SBI_QUOTA_NEED_REPAIR);
3074 }
3075 }
3076 /*
3077 * In case of checkpoint=disable, we must flush quota blocks.
3078 * This can cause NULL exception for node_inode in end_io, since
3079 * put_super already dropped it.
3080 */
3081 sync_filesystem(sb);
3082}
3083
3084static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
3085{
3086 struct quota_info *dqopt = sb_dqopt(sb);
3087 int type;
3088
3089 for (type = 0; type < MAXQUOTAS; type++) {
3090 if (!dqopt->files[type])
3091 continue;
3092 f2fs_inode_synced(inode: dqopt->files[type]);
3093 }
3094}
3095
3096static int f2fs_dquot_commit(struct dquot *dquot)
3097{
3098 struct f2fs_sb_info *sbi = F2FS_SB(sb: dquot->dq_sb);
3099 int ret;
3100
3101 f2fs_down_read_nested(sem: &sbi->quota_sem, SINGLE_DEPTH_NESTING);
3102 ret = dquot_commit(dquot);
3103 if (ret < 0)
3104 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
3105 f2fs_up_read(sem: &sbi->quota_sem);
3106 return ret;
3107}
3108
3109static int f2fs_dquot_acquire(struct dquot *dquot)
3110{
3111 struct f2fs_sb_info *sbi = F2FS_SB(sb: dquot->dq_sb);
3112 int ret;
3113
3114 f2fs_down_read(sem: &sbi->quota_sem);
3115 ret = dquot_acquire(dquot);
3116 if (ret < 0)
3117 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
3118 f2fs_up_read(sem: &sbi->quota_sem);
3119 return ret;
3120}
3121
3122static int f2fs_dquot_release(struct dquot *dquot)
3123{
3124 struct f2fs_sb_info *sbi = F2FS_SB(sb: dquot->dq_sb);
3125 int ret = dquot_release(dquot);
3126
3127 if (ret < 0)
3128 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
3129 return ret;
3130}
3131
3132static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
3133{
3134 struct super_block *sb = dquot->dq_sb;
3135 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3136 int ret = dquot_mark_dquot_dirty(dquot);
3137
3138 /* if we are using journalled quota */
3139 if (is_journalled_quota(sbi))
3140 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_FLUSH);
3141
3142 return ret;
3143}
3144
3145static int f2fs_dquot_commit_info(struct super_block *sb, int type)
3146{
3147 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3148 int ret = dquot_commit_info(sb, type);
3149
3150 if (ret < 0)
3151 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
3152 return ret;
3153}
3154
3155static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
3156{
3157 *projid = F2FS_I(inode)->i_projid;
3158 return 0;
3159}
3160
3161static const struct dquot_operations f2fs_quota_operations = {
3162 .get_reserved_space = f2fs_get_reserved_space,
3163 .write_dquot = f2fs_dquot_commit,
3164 .acquire_dquot = f2fs_dquot_acquire,
3165 .release_dquot = f2fs_dquot_release,
3166 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
3167 .write_info = f2fs_dquot_commit_info,
3168 .alloc_dquot = dquot_alloc,
3169 .destroy_dquot = dquot_destroy,
3170 .get_projid = f2fs_get_projid,
3171 .get_next_id = dquot_get_next_id,
3172};
3173
3174static const struct quotactl_ops f2fs_quotactl_ops = {
3175 .quota_on = f2fs_quota_on,
3176 .quota_off = f2fs_quota_off,
3177 .quota_sync = f2fs_quota_sync,
3178 .get_state = dquot_get_state,
3179 .set_info = dquot_set_dqinfo,
3180 .get_dqblk = dquot_get_dqblk,
3181 .set_dqblk = dquot_set_dqblk,
3182 .get_nextdqblk = dquot_get_next_dqblk,
3183};
3184#else
3185int f2fs_dquot_initialize(struct inode *inode)
3186{
3187 return 0;
3188}
3189
3190int f2fs_quota_sync(struct super_block *sb, int type)
3191{
3192 return 0;
3193}
3194
3195void f2fs_quota_off_umount(struct super_block *sb)
3196{
3197}
3198#endif
3199
3200static const struct super_operations f2fs_sops = {
3201 .alloc_inode = f2fs_alloc_inode,
3202 .free_inode = f2fs_free_inode,
3203 .drop_inode = f2fs_drop_inode,
3204 .write_inode = f2fs_write_inode,
3205 .dirty_inode = f2fs_dirty_inode,
3206 .show_options = f2fs_show_options,
3207#ifdef CONFIG_QUOTA
3208 .quota_read = f2fs_quota_read,
3209 .quota_write = f2fs_quota_write,
3210 .get_dquots = f2fs_get_dquots,
3211#endif
3212 .evict_inode = f2fs_evict_inode,
3213 .put_super = f2fs_put_super,
3214 .sync_fs = f2fs_sync_fs,
3215 .freeze_fs = f2fs_freeze,
3216 .unfreeze_fs = f2fs_unfreeze,
3217 .statfs = f2fs_statfs,
3218 .remount_fs = f2fs_remount,
3219};
3220
3221#ifdef CONFIG_FS_ENCRYPTION
3222static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3223{
3224 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3225 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3226 ctx, len, NULL);
3227}
3228
3229static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3230 void *fs_data)
3231{
3232 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3233
3234 /*
3235 * Encrypting the root directory is not allowed because fsck
3236 * expects lost+found directory to exist and remain unencrypted
3237 * if LOST_FOUND feature is enabled.
3238 *
3239 */
3240 if (f2fs_sb_has_lost_found(sbi) &&
3241 inode->i_ino == F2FS_ROOT_INO(sbi))
3242 return -EPERM;
3243
3244 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3245 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3246 ctx, len, fs_data, XATTR_CREATE);
3247}
3248
3249static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3250{
3251 return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3252}
3253
3254static bool f2fs_has_stable_inodes(struct super_block *sb)
3255{
3256 return true;
3257}
3258
3259static struct block_device **f2fs_get_devices(struct super_block *sb,
3260 unsigned int *num_devs)
3261{
3262 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3263 struct block_device **devs;
3264 int i;
3265
3266 if (!f2fs_is_multi_device(sbi))
3267 return NULL;
3268
3269 devs = kmalloc_array(n: sbi->s_ndevs, size: sizeof(*devs), GFP_KERNEL);
3270 if (!devs)
3271 return ERR_PTR(error: -ENOMEM);
3272
3273 for (i = 0; i < sbi->s_ndevs; i++)
3274 devs[i] = FDEV(i).bdev;
3275 *num_devs = sbi->s_ndevs;
3276 return devs;
3277}
3278
3279static const struct fscrypt_operations f2fs_cryptops = {
3280 .needs_bounce_pages = 1,
3281 .has_32bit_inodes = 1,
3282 .supports_subblock_data_units = 1,
3283 .legacy_key_prefix = "f2fs:",
3284 .get_context = f2fs_get_context,
3285 .set_context = f2fs_set_context,
3286 .get_dummy_policy = f2fs_get_dummy_policy,
3287 .empty_dir = f2fs_empty_dir,
3288 .has_stable_inodes = f2fs_has_stable_inodes,
3289 .get_devices = f2fs_get_devices,
3290};
3291#endif
3292
3293static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3294 u64 ino, u32 generation)
3295{
3296 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3297 struct inode *inode;
3298
3299 if (f2fs_check_nid_range(sbi, nid: ino))
3300 return ERR_PTR(error: -ESTALE);
3301
3302 /*
3303 * f2fs_iget isn't quite right if the inode is currently unallocated!
3304 * However f2fs_iget currently does appropriate checks to handle stale
3305 * inodes so everything is OK.
3306 */
3307 inode = f2fs_iget(sb, ino);
3308 if (IS_ERR(ptr: inode))
3309 return ERR_CAST(ptr: inode);
3310 if (unlikely(generation && inode->i_generation != generation)) {
3311 /* we didn't find the right inode.. */
3312 iput(inode);
3313 return ERR_PTR(error: -ESTALE);
3314 }
3315 return inode;
3316}
3317
3318static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3319 int fh_len, int fh_type)
3320{
3321 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3322 get_inode: f2fs_nfs_get_inode);
3323}
3324
3325static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3326 int fh_len, int fh_type)
3327{
3328 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3329 get_inode: f2fs_nfs_get_inode);
3330}
3331
3332static const struct export_operations f2fs_export_ops = {
3333 .encode_fh = generic_encode_ino32_fh,
3334 .fh_to_dentry = f2fs_fh_to_dentry,
3335 .fh_to_parent = f2fs_fh_to_parent,
3336 .get_parent = f2fs_get_parent,
3337};
3338
3339loff_t max_file_blocks(struct inode *inode)
3340{
3341 loff_t result = 0;
3342 loff_t leaf_count;
3343
3344 /*
3345 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3346 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3347 * space in inode.i_addr, it will be more safe to reassign
3348 * result as zero.
3349 */
3350
3351 if (inode && f2fs_compressed_file(inode))
3352 leaf_count = ADDRS_PER_BLOCK(inode);
3353 else
3354 leaf_count = DEF_ADDRS_PER_BLOCK;
3355
3356 /* two direct node blocks */
3357 result += (leaf_count * 2);
3358
3359 /* two indirect node blocks */
3360 leaf_count *= NIDS_PER_BLOCK;
3361 result += (leaf_count * 2);
3362
3363 /* one double indirect node block */
3364 leaf_count *= NIDS_PER_BLOCK;
3365 result += leaf_count;
3366
3367 return result;
3368}
3369
3370static int __f2fs_commit_super(struct buffer_head *bh,
3371 struct f2fs_super_block *super)
3372{
3373 lock_buffer(bh);
3374 if (super)
3375 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3376 set_buffer_dirty(bh);
3377 unlock_buffer(bh);
3378
3379 /* it's rare case, we can do fua all the time */
3380 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3381}
3382
3383static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3384 struct buffer_head *bh)
3385{
3386 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3387 (bh->b_data + F2FS_SUPER_OFFSET);
3388 struct super_block *sb = sbi->sb;
3389 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3390 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3391 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3392 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3393 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3394 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3395 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3396 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3397 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3398 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3399 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3400 u32 segment_count = le32_to_cpu(raw_super->segment_count);
3401 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3402 u64 main_end_blkaddr = main_blkaddr +
3403 (segment_count_main << log_blocks_per_seg);
3404 u64 seg_end_blkaddr = segment0_blkaddr +
3405 (segment_count << log_blocks_per_seg);
3406
3407 if (segment0_blkaddr != cp_blkaddr) {
3408 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3409 segment0_blkaddr, cp_blkaddr);
3410 return true;
3411 }
3412
3413 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3414 sit_blkaddr) {
3415 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3416 cp_blkaddr, sit_blkaddr,
3417 segment_count_ckpt << log_blocks_per_seg);
3418 return true;
3419 }
3420
3421 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3422 nat_blkaddr) {
3423 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3424 sit_blkaddr, nat_blkaddr,
3425 segment_count_sit << log_blocks_per_seg);
3426 return true;
3427 }
3428
3429 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3430 ssa_blkaddr) {
3431 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3432 nat_blkaddr, ssa_blkaddr,
3433 segment_count_nat << log_blocks_per_seg);
3434 return true;
3435 }
3436
3437 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3438 main_blkaddr) {
3439 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3440 ssa_blkaddr, main_blkaddr,
3441 segment_count_ssa << log_blocks_per_seg);
3442 return true;
3443 }
3444
3445 if (main_end_blkaddr > seg_end_blkaddr) {
3446 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3447 main_blkaddr, seg_end_blkaddr,
3448 segment_count_main << log_blocks_per_seg);
3449 return true;
3450 } else if (main_end_blkaddr < seg_end_blkaddr) {
3451 int err = 0;
3452 char *res;
3453
3454 /* fix in-memory information all the time */
3455 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3456 segment0_blkaddr) >> log_blocks_per_seg);
3457
3458 if (f2fs_readonly(sb) || f2fs_hw_is_readonly(sbi)) {
3459 set_sbi_flag(sbi, type: SBI_NEED_SB_WRITE);
3460 res = "internally";
3461 } else {
3462 err = __f2fs_commit_super(bh, NULL);
3463 res = err ? "failed" : "done";
3464 }
3465 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3466 res, main_blkaddr, seg_end_blkaddr,
3467 segment_count_main << log_blocks_per_seg);
3468 if (err)
3469 return true;
3470 }
3471 return false;
3472}
3473
3474static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3475 struct buffer_head *bh)
3476{
3477 block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3478 block_t total_sections, blocks_per_seg;
3479 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3480 (bh->b_data + F2FS_SUPER_OFFSET);
3481 size_t crc_offset = 0;
3482 __u32 crc = 0;
3483
3484 if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3485 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3486 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3487 return -EINVAL;
3488 }
3489
3490 /* Check checksum_offset and crc in superblock */
3491 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3492 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3493 if (crc_offset !=
3494 offsetof(struct f2fs_super_block, crc)) {
3495 f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3496 crc_offset);
3497 return -EFSCORRUPTED;
3498 }
3499 crc = le32_to_cpu(raw_super->crc);
3500 if (!f2fs_crc_valid(sbi, blk_crc: crc, buf: raw_super, buf_size: crc_offset)) {
3501 f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3502 return -EFSCORRUPTED;
3503 }
3504 }
3505
3506 /* Currently, support only 4KB block size */
3507 if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3508 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3509 le32_to_cpu(raw_super->log_blocksize),
3510 F2FS_BLKSIZE_BITS);
3511 return -EFSCORRUPTED;
3512 }
3513
3514 /* check log blocks per segment */
3515 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3516 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3517 le32_to_cpu(raw_super->log_blocks_per_seg));
3518 return -EFSCORRUPTED;
3519 }
3520
3521 /* Currently, support 512/1024/2048/4096/16K bytes sector size */
3522 if (le32_to_cpu(raw_super->log_sectorsize) >
3523 F2FS_MAX_LOG_SECTOR_SIZE ||
3524 le32_to_cpu(raw_super->log_sectorsize) <
3525 F2FS_MIN_LOG_SECTOR_SIZE) {
3526 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3527 le32_to_cpu(raw_super->log_sectorsize));
3528 return -EFSCORRUPTED;
3529 }
3530 if (le32_to_cpu(raw_super->log_sectors_per_block) +
3531 le32_to_cpu(raw_super->log_sectorsize) !=
3532 F2FS_MAX_LOG_SECTOR_SIZE) {
3533 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3534 le32_to_cpu(raw_super->log_sectors_per_block),
3535 le32_to_cpu(raw_super->log_sectorsize));
3536 return -EFSCORRUPTED;
3537 }
3538
3539 segment_count = le32_to_cpu(raw_super->segment_count);
3540 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3541 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3542 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3543 total_sections = le32_to_cpu(raw_super->section_count);
3544
3545 /* blocks_per_seg should be 512, given the above check */
3546 blocks_per_seg = BIT(le32_to_cpu(raw_super->log_blocks_per_seg));
3547
3548 if (segment_count > F2FS_MAX_SEGMENT ||
3549 segment_count < F2FS_MIN_SEGMENTS) {
3550 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3551 return -EFSCORRUPTED;
3552 }
3553
3554 if (total_sections > segment_count_main || total_sections < 1 ||
3555 segs_per_sec > segment_count || !segs_per_sec) {
3556 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3557 segment_count, total_sections, segs_per_sec);
3558 return -EFSCORRUPTED;
3559 }
3560
3561 if (segment_count_main != total_sections * segs_per_sec) {
3562 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3563 segment_count_main, total_sections, segs_per_sec);
3564 return -EFSCORRUPTED;
3565 }
3566
3567 if ((segment_count / segs_per_sec) < total_sections) {
3568 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3569 segment_count, segs_per_sec, total_sections);
3570 return -EFSCORRUPTED;
3571 }
3572
3573 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3574 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3575 segment_count, le64_to_cpu(raw_super->block_count));
3576 return -EFSCORRUPTED;
3577 }
3578
3579 if (RDEV(0).path[0]) {
3580 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3581 int i = 1;
3582
3583 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3584 dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3585 i++;
3586 }
3587 if (segment_count != dev_seg_count) {
3588 f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3589 segment_count, dev_seg_count);
3590 return -EFSCORRUPTED;
3591 }
3592 } else {
3593 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3594 !bdev_is_zoned(bdev: sbi->sb->s_bdev)) {
3595 f2fs_info(sbi, "Zoned block device path is missing");
3596 return -EFSCORRUPTED;
3597 }
3598 }
3599
3600 if (secs_per_zone > total_sections || !secs_per_zone) {
3601 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3602 secs_per_zone, total_sections);
3603 return -EFSCORRUPTED;
3604 }
3605 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3606 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3607 (le32_to_cpu(raw_super->extension_count) +
3608 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3609 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3610 le32_to_cpu(raw_super->extension_count),
3611 raw_super->hot_ext_count,
3612 F2FS_MAX_EXTENSION);
3613 return -EFSCORRUPTED;
3614 }
3615
3616 if (le32_to_cpu(raw_super->cp_payload) >=
3617 (blocks_per_seg - F2FS_CP_PACKS -
3618 NR_CURSEG_PERSIST_TYPE)) {
3619 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3620 le32_to_cpu(raw_super->cp_payload),
3621 blocks_per_seg - F2FS_CP_PACKS -
3622 NR_CURSEG_PERSIST_TYPE);
3623 return -EFSCORRUPTED;
3624 }
3625
3626 /* check reserved ino info */
3627 if (le32_to_cpu(raw_super->node_ino) != 1 ||
3628 le32_to_cpu(raw_super->meta_ino) != 2 ||
3629 le32_to_cpu(raw_super->root_ino) != 3) {
3630 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3631 le32_to_cpu(raw_super->node_ino),
3632 le32_to_cpu(raw_super->meta_ino),
3633 le32_to_cpu(raw_super->root_ino));
3634 return -EFSCORRUPTED;
3635 }
3636
3637 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3638 if (sanity_check_area_boundary(sbi, bh))
3639 return -EFSCORRUPTED;
3640
3641 return 0;
3642}
3643
3644int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3645{
3646 unsigned int total, fsmeta;
3647 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3648 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3649 unsigned int ovp_segments, reserved_segments;
3650 unsigned int main_segs, blocks_per_seg;
3651 unsigned int sit_segs, nat_segs;
3652 unsigned int sit_bitmap_size, nat_bitmap_size;
3653 unsigned int log_blocks_per_seg;
3654 unsigned int segment_count_main;
3655 unsigned int cp_pack_start_sum, cp_payload;
3656 block_t user_block_count, valid_user_blocks;
3657 block_t avail_node_count, valid_node_count;
3658 unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3659 int i, j;
3660
3661 total = le32_to_cpu(raw_super->segment_count);
3662 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3663 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3664 fsmeta += sit_segs;
3665 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3666 fsmeta += nat_segs;
3667 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3668 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3669
3670 if (unlikely(fsmeta >= total))
3671 return 1;
3672
3673 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3674 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3675
3676 if (!f2fs_sb_has_readonly(sbi) &&
3677 unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3678 ovp_segments == 0 || reserved_segments == 0)) {
3679 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3680 return 1;
3681 }
3682 user_block_count = le64_to_cpu(ckpt->user_block_count);
3683 segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3684 (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3685 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3686 if (!user_block_count || user_block_count >=
3687 segment_count_main << log_blocks_per_seg) {
3688 f2fs_err(sbi, "Wrong user_block_count: %u",
3689 user_block_count);
3690 return 1;
3691 }
3692
3693 valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3694 if (valid_user_blocks > user_block_count) {
3695 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3696 valid_user_blocks, user_block_count);
3697 return 1;
3698 }
3699
3700 valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3701 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3702 if (valid_node_count > avail_node_count) {
3703 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3704 valid_node_count, avail_node_count);
3705 return 1;
3706 }
3707
3708 main_segs = le32_to_cpu(raw_super->segment_count_main);
3709 blocks_per_seg = sbi->blocks_per_seg;
3710
3711 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3712 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3713 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3714 return 1;
3715
3716 if (f2fs_sb_has_readonly(sbi))
3717 goto check_data;
3718
3719 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3720 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3721 le32_to_cpu(ckpt->cur_node_segno[j])) {
3722 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3723 i, j,
3724 le32_to_cpu(ckpt->cur_node_segno[i]));
3725 return 1;
3726 }
3727 }
3728 }
3729check_data:
3730 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3731 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3732 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3733 return 1;
3734
3735 if (f2fs_sb_has_readonly(sbi))
3736 goto skip_cross;
3737
3738 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3739 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3740 le32_to_cpu(ckpt->cur_data_segno[j])) {
3741 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3742 i, j,
3743 le32_to_cpu(ckpt->cur_data_segno[i]));
3744 return 1;
3745 }
3746 }
3747 }
3748 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3749 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3750 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3751 le32_to_cpu(ckpt->cur_data_segno[j])) {
3752 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3753 i, j,
3754 le32_to_cpu(ckpt->cur_node_segno[i]));
3755 return 1;
3756 }
3757 }
3758 }
3759skip_cross:
3760 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3761 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3762
3763 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3764 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3765 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3766 sit_bitmap_size, nat_bitmap_size);
3767 return 1;
3768 }
3769
3770 cp_pack_start_sum = __start_sum_addr(sbi);
3771 cp_payload = __cp_payload(sbi);
3772 if (cp_pack_start_sum < cp_payload + 1 ||
3773 cp_pack_start_sum > blocks_per_seg - 1 -
3774 NR_CURSEG_PERSIST_TYPE) {
3775 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3776 cp_pack_start_sum);
3777 return 1;
3778 }
3779
3780 if (__is_set_ckpt_flags(cp: ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3781 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3782 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3783 "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3784 "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3785 le32_to_cpu(ckpt->checksum_offset));
3786 return 1;
3787 }
3788
3789 nat_blocks = nat_segs << log_blocks_per_seg;
3790 nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3791 nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3792 if (__is_set_ckpt_flags(cp: ckpt, CP_NAT_BITS_FLAG) &&
3793 (cp_payload + F2FS_CP_PACKS +
3794 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3795 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3796 cp_payload, nat_bits_blocks);
3797 return 1;
3798 }
3799
3800 if (unlikely(f2fs_cp_error(sbi))) {
3801 f2fs_err(sbi, "A bug case: need to run fsck");
3802 return 1;
3803 }
3804 return 0;
3805}
3806
3807static void init_sb_info(struct f2fs_sb_info *sbi)
3808{
3809 struct f2fs_super_block *raw_super = sbi->raw_super;
3810 int i;
3811
3812 sbi->log_sectors_per_block =
3813 le32_to_cpu(raw_super->log_sectors_per_block);
3814 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3815 sbi->blocksize = BIT(sbi->log_blocksize);
3816 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3817 sbi->blocks_per_seg = BIT(sbi->log_blocks_per_seg);
3818 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3819 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3820 sbi->total_sections = le32_to_cpu(raw_super->section_count);
3821 sbi->total_node_count =
3822 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3823 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3824 F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3825 F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3826 F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3827 sbi->cur_victim_sec = NULL_SECNO;
3828 sbi->gc_mode = GC_NORMAL;
3829 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3830 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3831 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3832 sbi->migration_granularity = sbi->segs_per_sec;
3833 sbi->seq_file_ra_mul = MIN_RA_MUL;
3834 sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3835 sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3836 spin_lock_init(&sbi->gc_remaining_trials_lock);
3837 atomic64_set(v: &sbi->current_atomic_write, i: 0);
3838
3839 sbi->dir_level = DEF_DIR_LEVEL;
3840 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3841 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3842 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3843 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3844 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3845 sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3846 DEF_UMOUNT_DISCARD_TIMEOUT;
3847 clear_sbi_flag(sbi, type: SBI_NEED_FSCK);
3848
3849 for (i = 0; i < NR_COUNT_TYPE; i++)
3850 atomic_set(v: &sbi->nr_pages[i], i: 0);
3851
3852 for (i = 0; i < META; i++)
3853 atomic_set(v: &sbi->wb_sync_req[i], i: 0);
3854
3855 INIT_LIST_HEAD(list: &sbi->s_list);
3856 mutex_init(&sbi->umount_mutex);
3857 init_f2fs_rwsem(&sbi->io_order_lock);
3858 spin_lock_init(&sbi->cp_lock);
3859
3860 sbi->dirty_device = 0;
3861 spin_lock_init(&sbi->dev_lock);
3862
3863 init_f2fs_rwsem(&sbi->sb_lock);
3864 init_f2fs_rwsem(&sbi->pin_sem);
3865}
3866
3867static int init_percpu_info(struct f2fs_sb_info *sbi)
3868{
3869 int err;
3870
3871 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3872 if (err)
3873 return err;
3874
3875 err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3876 if (err)
3877 goto err_valid_block;
3878
3879 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3880 GFP_KERNEL);
3881 if (err)
3882 goto err_node_block;
3883 return 0;
3884
3885err_node_block:
3886 percpu_counter_destroy(fbc: &sbi->rf_node_block_count);
3887err_valid_block:
3888 percpu_counter_destroy(fbc: &sbi->alloc_valid_block_count);
3889 return err;
3890}
3891
3892#ifdef CONFIG_BLK_DEV_ZONED
3893
3894struct f2fs_report_zones_args {
3895 struct f2fs_sb_info *sbi;
3896 struct f2fs_dev_info *dev;
3897};
3898
3899static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3900 void *data)
3901{
3902 struct f2fs_report_zones_args *rz_args = data;
3903 block_t unusable_blocks = (zone->len - zone->capacity) >>
3904 F2FS_LOG_SECTORS_PER_BLOCK;
3905
3906 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3907 return 0;
3908
3909 set_bit(nr: idx, addr: rz_args->dev->blkz_seq);
3910 if (!rz_args->sbi->unusable_blocks_per_sec) {
3911 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3912 return 0;
3913 }
3914 if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3915 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3916 return -EINVAL;
3917 }
3918 return 0;
3919}
3920
3921static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3922{
3923 struct block_device *bdev = FDEV(devi).bdev;
3924 sector_t nr_sectors = bdev_nr_sectors(bdev);
3925 struct f2fs_report_zones_args rep_zone_arg;
3926 u64 zone_sectors;
3927 int ret;
3928
3929 if (!f2fs_sb_has_blkzoned(sbi))
3930 return 0;
3931
3932 zone_sectors = bdev_zone_sectors(bdev);
3933 if (!is_power_of_2(n: zone_sectors)) {
3934 f2fs_err(sbi, "F2FS does not support non power of 2 zone sizes\n");
3935 return -EINVAL;
3936 }
3937
3938 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3939 SECTOR_TO_BLOCK(zone_sectors))
3940 return -EINVAL;
3941 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(zone_sectors);
3942 FDEV(devi).nr_blkz = div_u64(SECTOR_TO_BLOCK(nr_sectors),
3943 divisor: sbi->blocks_per_blkz);
3944 if (nr_sectors & (zone_sectors - 1))
3945 FDEV(devi).nr_blkz++;
3946
3947 FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3948 BITS_TO_LONGS(FDEV(devi).nr_blkz)
3949 * sizeof(unsigned long),
3950 GFP_KERNEL);
3951 if (!FDEV(devi).blkz_seq)
3952 return -ENOMEM;
3953
3954 rep_zone_arg.sbi = sbi;
3955 rep_zone_arg.dev = &FDEV(devi);
3956
3957 ret = blkdev_report_zones(bdev, sector: 0, BLK_ALL_ZONES, cb: f2fs_report_zone_cb,
3958 data: &rep_zone_arg);
3959 if (ret < 0)
3960 return ret;
3961 return 0;
3962}
3963#endif
3964
3965/*
3966 * Read f2fs raw super block.
3967 * Because we have two copies of super block, so read both of them
3968 * to get the first valid one. If any one of them is broken, we pass
3969 * them recovery flag back to the caller.
3970 */
3971static int read_raw_super_block(struct f2fs_sb_info *sbi,
3972 struct f2fs_super_block **raw_super,
3973 int *valid_super_block, int *recovery)
3974{
3975 struct super_block *sb = sbi->sb;
3976 int block;
3977 struct buffer_head *bh;
3978 struct f2fs_super_block *super;
3979 int err = 0;
3980
3981 super = kzalloc(size: sizeof(struct f2fs_super_block), GFP_KERNEL);
3982 if (!super)
3983 return -ENOMEM;
3984
3985 for (block = 0; block < 2; block++) {
3986 bh = sb_bread(sb, block);
3987 if (!bh) {
3988 f2fs_err(sbi, "Unable to read %dth superblock",
3989 block + 1);
3990 err = -EIO;
3991 *recovery = 1;
3992 continue;
3993 }
3994
3995 /* sanity checking of raw super */
3996 err = sanity_check_raw_super(sbi, bh);
3997 if (err) {
3998 f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3999 block + 1);
4000 brelse(bh);
4001 *recovery = 1;
4002 continue;
4003 }
4004
4005 if (!*raw_super) {
4006 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
4007 sizeof(*super));
4008 *valid_super_block = block;
4009 *raw_super = super;
4010 }
4011 brelse(bh);
4012 }
4013
4014 /* No valid superblock */
4015 if (!*raw_super)
4016 kfree(objp: super);
4017 else
4018 err = 0;
4019
4020 return err;
4021}
4022
4023int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
4024{
4025 struct buffer_head *bh;
4026 __u32 crc = 0;
4027 int err;
4028
4029 if ((recover && f2fs_readonly(sb: sbi->sb)) ||
4030 f2fs_hw_is_readonly(sbi)) {
4031 set_sbi_flag(sbi, type: SBI_NEED_SB_WRITE);
4032 return -EROFS;
4033 }
4034
4035 /* we should update superblock crc here */
4036 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
4037 crc = f2fs_crc32(sbi, address: F2FS_RAW_SUPER(sbi),
4038 offsetof(struct f2fs_super_block, crc));
4039 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
4040 }
4041
4042 /* write back-up superblock first */
4043 bh = sb_bread(sb: sbi->sb, block: sbi->valid_super_block ? 0 : 1);
4044 if (!bh)
4045 return -EIO;
4046 err = __f2fs_commit_super(bh, super: F2FS_RAW_SUPER(sbi));
4047 brelse(bh);
4048
4049 /* if we are in recovery path, skip writing valid superblock */
4050 if (recover || err)
4051 return err;
4052
4053 /* write current valid superblock */
4054 bh = sb_bread(sb: sbi->sb, block: sbi->valid_super_block);
4055 if (!bh)
4056 return -EIO;
4057 err = __f2fs_commit_super(bh, super: F2FS_RAW_SUPER(sbi));
4058 brelse(bh);
4059 return err;
4060}
4061
4062static void save_stop_reason(struct f2fs_sb_info *sbi, unsigned char reason)
4063{
4064 unsigned long flags;
4065
4066 spin_lock_irqsave(&sbi->error_lock, flags);
4067 if (sbi->stop_reason[reason] < GENMASK(BITS_PER_BYTE - 1, 0))
4068 sbi->stop_reason[reason]++;
4069 spin_unlock_irqrestore(lock: &sbi->error_lock, flags);
4070}
4071
4072static void f2fs_record_stop_reason(struct f2fs_sb_info *sbi)
4073{
4074 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4075 unsigned long flags;
4076 int err;
4077
4078 f2fs_down_write(sem: &sbi->sb_lock);
4079
4080 spin_lock_irqsave(&sbi->error_lock, flags);
4081 if (sbi->error_dirty) {
4082 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4083 MAX_F2FS_ERRORS);
4084 sbi->error_dirty = false;
4085 }
4086 memcpy(raw_super->s_stop_reason, sbi->stop_reason, MAX_STOP_REASON);
4087 spin_unlock_irqrestore(lock: &sbi->error_lock, flags);
4088
4089 err = f2fs_commit_super(sbi, recover: false);
4090
4091 f2fs_up_write(sem: &sbi->sb_lock);
4092 if (err)
4093 f2fs_err(sbi, "f2fs_commit_super fails to record err:%d", err);
4094}
4095
4096void f2fs_save_errors(struct f2fs_sb_info *sbi, unsigned char flag)
4097{
4098 unsigned long flags;
4099
4100 spin_lock_irqsave(&sbi->error_lock, flags);
4101 if (!test_bit(flag, (unsigned long *)sbi->errors)) {
4102 set_bit(nr: flag, addr: (unsigned long *)sbi->errors);
4103 sbi->error_dirty = true;
4104 }
4105 spin_unlock_irqrestore(lock: &sbi->error_lock, flags);
4106}
4107
4108static bool f2fs_update_errors(struct f2fs_sb_info *sbi)
4109{
4110 unsigned long flags;
4111 bool need_update = false;
4112
4113 spin_lock_irqsave(&sbi->error_lock, flags);
4114 if (sbi->error_dirty) {
4115 memcpy(F2FS_RAW_SUPER(sbi)->s_errors, sbi->errors,
4116 MAX_F2FS_ERRORS);
4117 sbi->error_dirty = false;
4118 need_update = true;
4119 }
4120 spin_unlock_irqrestore(lock: &sbi->error_lock, flags);
4121
4122 return need_update;
4123}
4124
4125static void f2fs_record_errors(struct f2fs_sb_info *sbi, unsigned char error)
4126{
4127 int err;
4128
4129 f2fs_down_write(sem: &sbi->sb_lock);
4130
4131 if (!f2fs_update_errors(sbi))
4132 goto out_unlock;
4133
4134 err = f2fs_commit_super(sbi, recover: false);
4135 if (err)
4136 f2fs_err(sbi, "f2fs_commit_super fails to record errors:%u, err:%d",
4137 error, err);
4138out_unlock:
4139 f2fs_up_write(sem: &sbi->sb_lock);
4140}
4141
4142void f2fs_handle_error(struct f2fs_sb_info *sbi, unsigned char error)
4143{
4144 f2fs_save_errors(sbi, flag: error);
4145 f2fs_record_errors(sbi, error);
4146}
4147
4148void f2fs_handle_error_async(struct f2fs_sb_info *sbi, unsigned char error)
4149{
4150 f2fs_save_errors(sbi, flag: error);
4151
4152 if (!sbi->error_dirty)
4153 return;
4154 if (!test_bit(error, (unsigned long *)sbi->errors))
4155 return;
4156 schedule_work(work: &sbi->s_error_work);
4157}
4158
4159static bool system_going_down(void)
4160{
4161 return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
4162 || system_state == SYSTEM_RESTART;
4163}
4164
4165void f2fs_handle_critical_error(struct f2fs_sb_info *sbi, unsigned char reason,
4166 bool irq_context)
4167{
4168 struct super_block *sb = sbi->sb;
4169 bool shutdown = reason == STOP_CP_REASON_SHUTDOWN;
4170 bool continue_fs = !shutdown &&
4171 F2FS_OPTION(sbi).errors == MOUNT_ERRORS_CONTINUE;
4172
4173 set_ckpt_flags(sbi, CP_ERROR_FLAG);
4174
4175 if (!f2fs_hw_is_readonly(sbi)) {
4176 save_stop_reason(sbi, reason);
4177
4178 if (irq_context && !shutdown)
4179 schedule_work(work: &sbi->s_error_work);
4180 else
4181 f2fs_record_stop_reason(sbi);
4182 }
4183
4184 /*
4185 * We force ERRORS_RO behavior when system is rebooting. Otherwise we
4186 * could panic during 'reboot -f' as the underlying device got already
4187 * disabled.
4188 */
4189 if (F2FS_OPTION(sbi).errors == MOUNT_ERRORS_PANIC &&
4190 !shutdown && !system_going_down() &&
4191 !is_sbi_flag_set(sbi, type: SBI_IS_SHUTDOWN))
4192 panic(fmt: "F2FS-fs (device %s): panic forced after error\n",
4193 sb->s_id);
4194
4195 if (shutdown)
4196 set_sbi_flag(sbi, type: SBI_IS_SHUTDOWN);
4197
4198 /* continue filesystem operators if errors=continue */
4199 if (continue_fs || f2fs_readonly(sb))
4200 return;
4201
4202 f2fs_warn(sbi, "Remounting filesystem read-only");
4203 /*
4204 * Make sure updated value of ->s_mount_flags will be visible before
4205 * ->s_flags update
4206 */
4207 smp_wmb();
4208 sb->s_flags |= SB_RDONLY;
4209}
4210
4211static void f2fs_record_error_work(struct work_struct *work)
4212{
4213 struct f2fs_sb_info *sbi = container_of(work,
4214 struct f2fs_sb_info, s_error_work);
4215
4216 f2fs_record_stop_reason(sbi);
4217}
4218
4219static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
4220{
4221 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
4222 unsigned int max_devices = MAX_DEVICES;
4223 unsigned int logical_blksize;
4224 blk_mode_t mode = sb_open_mode(sbi->sb->s_flags);
4225 int i;
4226
4227 /* Initialize single device information */
4228 if (!RDEV(0).path[0]) {
4229 if (!bdev_is_zoned(bdev: sbi->sb->s_bdev))
4230 return 0;
4231 max_devices = 1;
4232 }
4233
4234 /*
4235 * Initialize multiple devices information, or single
4236 * zoned block device information.
4237 */
4238 sbi->devs = f2fs_kzalloc(sbi,
4239 array_size(max_devices,
4240 sizeof(struct f2fs_dev_info)),
4241 GFP_KERNEL);
4242 if (!sbi->devs)
4243 return -ENOMEM;
4244
4245 logical_blksize = bdev_logical_block_size(bdev: sbi->sb->s_bdev);
4246 sbi->aligned_blksize = true;
4247
4248 for (i = 0; i < max_devices; i++) {
4249 if (i == 0)
4250 FDEV(0).bdev_handle = sbi->sb->s_bdev_handle;
4251 else if (!RDEV(i).path[0])
4252 break;
4253
4254 if (max_devices > 1) {
4255 /* Multi-device mount */
4256 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
4257 FDEV(i).total_segments =
4258 le32_to_cpu(RDEV(i).total_segments);
4259 if (i == 0) {
4260 FDEV(i).start_blk = 0;
4261 FDEV(i).end_blk = FDEV(i).start_blk +
4262 (FDEV(i).total_segments <<
4263 sbi->log_blocks_per_seg) - 1 +
4264 le32_to_cpu(raw_super->segment0_blkaddr);
4265 } else {
4266 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
4267 FDEV(i).end_blk = FDEV(i).start_blk +
4268 (FDEV(i).total_segments <<
4269 sbi->log_blocks_per_seg) - 1;
4270 FDEV(i).bdev_handle = bdev_open_by_path(
4271 FDEV(i).path, mode, holder: sbi->sb, NULL);
4272 }
4273 }
4274 if (IS_ERR(FDEV(i).bdev_handle))
4275 return PTR_ERR(FDEV(i).bdev_handle);
4276
4277 FDEV(i).bdev = FDEV(i).bdev_handle->bdev;
4278 /* to release errored devices */
4279 sbi->s_ndevs = i + 1;
4280
4281 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
4282 sbi->aligned_blksize = false;
4283
4284#ifdef CONFIG_BLK_DEV_ZONED
4285 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
4286 !f2fs_sb_has_blkzoned(sbi)) {
4287 f2fs_err(sbi, "Zoned block device feature not enabled");
4288 return -EINVAL;
4289 }
4290 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
4291 if (init_blkz_info(sbi, devi: i)) {
4292 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
4293 return -EINVAL;
4294 }
4295 if (max_devices == 1)
4296 break;
4297 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
4298 i, FDEV(i).path,
4299 FDEV(i).total_segments,
4300 FDEV(i).start_blk, FDEV(i).end_blk,
4301 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
4302 "Host-aware" : "Host-managed");
4303 continue;
4304 }
4305#endif
4306 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
4307 i, FDEV(i).path,
4308 FDEV(i).total_segments,
4309 FDEV(i).start_blk, FDEV(i).end_blk);
4310 }
4311 f2fs_info(sbi,
4312 "IO Block Size: %8ld KB", F2FS_IO_SIZE_KB(sbi));
4313 return 0;
4314}
4315
4316static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
4317{
4318#if IS_ENABLED(CONFIG_UNICODE)
4319 if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
4320 const struct f2fs_sb_encodings *encoding_info;
4321 struct unicode_map *encoding;
4322 __u16 encoding_flags;
4323
4324 encoding_info = f2fs_sb_read_encoding(sb: sbi->raw_super);
4325 if (!encoding_info) {
4326 f2fs_err(sbi,
4327 "Encoding requested by superblock is unknown");
4328 return -EINVAL;
4329 }
4330
4331 encoding_flags = le16_to_cpu(sbi->raw_super->s_encoding_flags);
4332 encoding = utf8_load(version: encoding_info->version);
4333 if (IS_ERR(ptr: encoding)) {
4334 f2fs_err(sbi,
4335 "can't mount with superblock charset: %s-%u.%u.%u "
4336 "not supported by the kernel. flags: 0x%x.",
4337 encoding_info->name,
4338 unicode_major(encoding_info->version),
4339 unicode_minor(encoding_info->version),
4340 unicode_rev(encoding_info->version),
4341 encoding_flags);
4342 return PTR_ERR(ptr: encoding);
4343 }
4344 f2fs_info(sbi, "Using encoding defined by superblock: "
4345 "%s-%u.%u.%u with flags 0x%hx", encoding_info->name,
4346 unicode_major(encoding_info->version),
4347 unicode_minor(encoding_info->version),
4348 unicode_rev(encoding_info->version),
4349 encoding_flags);
4350
4351 sbi->sb->s_encoding = encoding;
4352 sbi->sb->s_encoding_flags = encoding_flags;
4353 }
4354#else
4355 if (f2fs_sb_has_casefold(sbi)) {
4356 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4357 return -EINVAL;
4358 }
4359#endif
4360 return 0;
4361}
4362
4363static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4364{
4365 /* adjust parameters according to the volume size */
4366 if (MAIN_SEGS(sbi) <= SMALL_VOLUME_SEGMENTS) {
4367 if (f2fs_block_unit_discard(sbi))
4368 SM_I(sbi)->dcc_info->discard_granularity =
4369 MIN_DISCARD_GRANULARITY;
4370 if (!f2fs_lfs_mode(sbi))
4371 SM_I(sbi)->ipu_policy = BIT(F2FS_IPU_FORCE) |
4372 BIT(F2FS_IPU_HONOR_OPU_WRITE);
4373 }
4374
4375 sbi->readdir_ra = true;
4376}
4377
4378static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4379{
4380 struct f2fs_sb_info *sbi;
4381 struct f2fs_super_block *raw_super;
4382 struct inode *root;
4383 int err;
4384 bool skip_recovery = false, need_fsck = false;
4385 char *options = NULL;
4386 int recovery, i, valid_super_block;
4387 struct curseg_info *seg_i;
4388 int retry_cnt = 1;
4389#ifdef CONFIG_QUOTA
4390 bool quota_enabled = false;
4391#endif
4392
4393try_onemore:
4394 err = -EINVAL;
4395 raw_super = NULL;
4396 valid_super_block = -1;
4397 recovery = 0;
4398
4399 /* allocate memory for f2fs-specific super block info */
4400 sbi = kzalloc(size: sizeof(struct f2fs_sb_info), GFP_KERNEL);
4401 if (!sbi)
4402 return -ENOMEM;
4403
4404 sbi->sb = sb;
4405
4406 /* initialize locks within allocated memory */
4407 init_f2fs_rwsem(&sbi->gc_lock);
4408 mutex_init(&sbi->writepages);
4409 init_f2fs_rwsem(&sbi->cp_global_sem);
4410 init_f2fs_rwsem(&sbi->node_write);
4411 init_f2fs_rwsem(&sbi->node_change);
4412 spin_lock_init(&sbi->stat_lock);
4413 init_f2fs_rwsem(&sbi->cp_rwsem);
4414 init_f2fs_rwsem(&sbi->quota_sem);
4415 init_waitqueue_head(&sbi->cp_wait);
4416 spin_lock_init(&sbi->error_lock);
4417
4418 for (i = 0; i < NR_INODE_TYPE; i++) {
4419 INIT_LIST_HEAD(list: &sbi->inode_list[i]);
4420 spin_lock_init(&sbi->inode_lock[i]);
4421 }
4422 mutex_init(&sbi->flush_lock);
4423
4424 /* Load the checksum driver */
4425 sbi->s_chksum_driver = crypto_alloc_shash(alg_name: "crc32", type: 0, mask: 0);
4426 if (IS_ERR(ptr: sbi->s_chksum_driver)) {
4427 f2fs_err(sbi, "Cannot load crc32 driver.");
4428 err = PTR_ERR(ptr: sbi->s_chksum_driver);
4429 sbi->s_chksum_driver = NULL;
4430 goto free_sbi;
4431 }
4432
4433 /* set a block size */
4434 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4435 f2fs_err(sbi, "unable to set blocksize");
4436 goto free_sbi;
4437 }
4438
4439 err = read_raw_super_block(sbi, raw_super: &raw_super, valid_super_block: &valid_super_block,
4440 recovery: &recovery);
4441 if (err)
4442 goto free_sbi;
4443
4444 sb->s_fs_info = sbi;
4445 sbi->raw_super = raw_super;
4446
4447 INIT_WORK(&sbi->s_error_work, f2fs_record_error_work);
4448 memcpy(sbi->errors, raw_super->s_errors, MAX_F2FS_ERRORS);
4449 memcpy(sbi->stop_reason, raw_super->s_stop_reason, MAX_STOP_REASON);
4450
4451 /* precompute checksum seed for metadata */
4452 if (f2fs_sb_has_inode_chksum(sbi))
4453 sbi->s_chksum_seed = f2fs_chksum(sbi, crc: ~0, address: raw_super->uuid,
4454 length: sizeof(raw_super->uuid));
4455
4456 default_options(sbi, remount: false);
4457 /* parse mount options */
4458 options = kstrdup(s: (const char *)data, GFP_KERNEL);
4459 if (data && !options) {
4460 err = -ENOMEM;
4461 goto free_sb_buf;
4462 }
4463
4464 err = parse_options(sb, options, is_remount: false);
4465 if (err)
4466 goto free_options;
4467
4468 sb->s_maxbytes = max_file_blocks(NULL) <<
4469 le32_to_cpu(raw_super->log_blocksize);
4470 sb->s_max_links = F2FS_LINK_MAX;
4471
4472 err = f2fs_setup_casefold(sbi);
4473 if (err)
4474 goto free_options;
4475
4476#ifdef CONFIG_QUOTA
4477 sb->dq_op = &f2fs_quota_operations;
4478 sb->s_qcop = &f2fs_quotactl_ops;
4479 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4480
4481 if (f2fs_sb_has_quota_ino(sbi)) {
4482 for (i = 0; i < MAXQUOTAS; i++) {
4483 if (f2fs_qf_ino(sb: sbi->sb, type: i))
4484 sbi->nquota_files++;
4485 }
4486 }
4487#endif
4488
4489 sb->s_op = &f2fs_sops;
4490#ifdef CONFIG_FS_ENCRYPTION
4491 sb->s_cop = &f2fs_cryptops;
4492#endif
4493#ifdef CONFIG_FS_VERITY
4494 sb->s_vop = &f2fs_verityops;
4495#endif
4496 sb->s_xattr = f2fs_xattr_handlers;
4497 sb->s_export_op = &f2fs_export_ops;
4498 sb->s_magic = F2FS_SUPER_MAGIC;
4499 sb->s_time_gran = 1;
4500 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4501 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4502 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4503 sb->s_iflags |= SB_I_CGROUPWB;
4504
4505 /* init f2fs-specific super block info */
4506 sbi->valid_super_block = valid_super_block;
4507
4508 /* disallow all the data/node/meta page writes */
4509 set_sbi_flag(sbi, type: SBI_POR_DOING);
4510
4511 err = f2fs_init_write_merge_io(sbi);
4512 if (err)
4513 goto free_bio_info;
4514
4515 init_sb_info(sbi);
4516
4517 err = f2fs_init_iostat(sbi);
4518 if (err)
4519 goto free_bio_info;
4520
4521 err = init_percpu_info(sbi);
4522 if (err)
4523 goto free_iostat;
4524
4525 if (F2FS_IO_ALIGNED(sbi)) {
4526 sbi->write_io_dummy =
4527 mempool_create_page_pool(min_nr: 2 * (F2FS_IO_SIZE(sbi) - 1), order: 0);
4528 if (!sbi->write_io_dummy) {
4529 err = -ENOMEM;
4530 goto free_percpu;
4531 }
4532 }
4533
4534 /* init per sbi slab cache */
4535 err = f2fs_init_xattr_caches(sbi);
4536 if (err)
4537 goto free_io_dummy;
4538 err = f2fs_init_page_array_cache(sbi);
4539 if (err)
4540 goto free_xattr_cache;
4541
4542 /* get an inode for meta space */
4543 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4544 if (IS_ERR(ptr: sbi->meta_inode)) {
4545 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4546 err = PTR_ERR(ptr: sbi->meta_inode);
4547 goto free_page_array_cache;
4548 }
4549
4550 err = f2fs_get_valid_checkpoint(sbi);
4551 if (err) {
4552 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4553 goto free_meta_inode;
4554 }
4555
4556 if (__is_set_ckpt_flags(cp: F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4557 set_sbi_flag(sbi, type: SBI_QUOTA_NEED_REPAIR);
4558 if (__is_set_ckpt_flags(cp: F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4559 set_sbi_flag(sbi, type: SBI_CP_DISABLED_QUICK);
4560 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4561 }
4562
4563 if (__is_set_ckpt_flags(cp: F2FS_CKPT(sbi), CP_FSCK_FLAG))
4564 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
4565
4566 /* Initialize device list */
4567 err = f2fs_scan_devices(sbi);
4568 if (err) {
4569 f2fs_err(sbi, "Failed to find devices");
4570 goto free_devices;
4571 }
4572
4573 err = f2fs_init_post_read_wq(sbi);
4574 if (err) {
4575 f2fs_err(sbi, "Failed to initialize post read workqueue");
4576 goto free_devices;
4577 }
4578
4579 sbi->total_valid_node_count =
4580 le32_to_cpu(sbi->ckpt->valid_node_count);
4581 percpu_counter_set(fbc: &sbi->total_valid_inode_count,
4582 le32_to_cpu(sbi->ckpt->valid_inode_count));
4583 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4584 sbi->total_valid_block_count =
4585 le64_to_cpu(sbi->ckpt->valid_block_count);
4586 sbi->last_valid_block_count = sbi->total_valid_block_count;
4587 sbi->reserved_blocks = 0;
4588 sbi->current_reserved_blocks = 0;
4589 limit_reserve_root(sbi);
4590 adjust_unusable_cap_perc(sbi);
4591
4592 f2fs_init_extent_cache_info(sbi);
4593
4594 f2fs_init_ino_entry_info(sbi);
4595
4596 f2fs_init_fsync_node_info(sbi);
4597
4598 /* setup checkpoint request control and start checkpoint issue thread */
4599 f2fs_init_ckpt_req_control(sbi);
4600 if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4601 test_opt(sbi, MERGE_CHECKPOINT)) {
4602 err = f2fs_start_ckpt_thread(sbi);
4603 if (err) {
4604 f2fs_err(sbi,
4605 "Failed to start F2FS issue_checkpoint_thread (%d)",
4606 err);
4607 goto stop_ckpt_thread;
4608 }
4609 }
4610
4611 /* setup f2fs internal modules */
4612 err = f2fs_build_segment_manager(sbi);
4613 if (err) {
4614 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4615 err);
4616 goto free_sm;
4617 }
4618 err = f2fs_build_node_manager(sbi);
4619 if (err) {
4620 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4621 err);
4622 goto free_nm;
4623 }
4624
4625 err = adjust_reserved_segment(sbi);
4626 if (err)
4627 goto free_nm;
4628
4629 /* For write statistics */
4630 sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4631
4632 /* Read accumulated write IO statistics if exists */
4633 seg_i = CURSEG_I(sbi, type: CURSEG_HOT_NODE);
4634 if (__exist_node_summaries(sbi))
4635 sbi->kbytes_written =
4636 le64_to_cpu(seg_i->journal->info.kbytes_written);
4637
4638 f2fs_build_gc_manager(sbi);
4639
4640 err = f2fs_build_stats(sbi);
4641 if (err)
4642 goto free_nm;
4643
4644 /* get an inode for node space */
4645 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4646 if (IS_ERR(ptr: sbi->node_inode)) {
4647 f2fs_err(sbi, "Failed to read node inode");
4648 err = PTR_ERR(ptr: sbi->node_inode);
4649 goto free_stats;
4650 }
4651
4652 /* read root inode and dentry */
4653 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4654 if (IS_ERR(ptr: root)) {
4655 f2fs_err(sbi, "Failed to read root inode");
4656 err = PTR_ERR(ptr: root);
4657 goto free_node_inode;
4658 }
4659 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4660 !root->i_size || !root->i_nlink) {
4661 iput(root);
4662 err = -EINVAL;
4663 goto free_node_inode;
4664 }
4665
4666 sb->s_root = d_make_root(root); /* allocate root dentry */
4667 if (!sb->s_root) {
4668 err = -ENOMEM;
4669 goto free_node_inode;
4670 }
4671
4672 err = f2fs_init_compress_inode(sbi);
4673 if (err)
4674 goto free_root_inode;
4675
4676 err = f2fs_register_sysfs(sbi);
4677 if (err)
4678 goto free_compress_inode;
4679
4680#ifdef CONFIG_QUOTA
4681 /* Enable quota usage during mount */
4682 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4683 err = f2fs_enable_quotas(sb);
4684 if (err)
4685 f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4686 }
4687
4688 quota_enabled = f2fs_recover_quota_begin(sbi);
4689#endif
4690 /* if there are any orphan inodes, free them */
4691 err = f2fs_recover_orphan_inodes(sbi);
4692 if (err)
4693 goto free_meta;
4694
4695 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4696 goto reset_checkpoint;
4697
4698 /* recover fsynced data */
4699 if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4700 !test_opt(sbi, NORECOVERY)) {
4701 /*
4702 * mount should be failed, when device has readonly mode, and
4703 * previous checkpoint was not done by clean system shutdown.
4704 */
4705 if (f2fs_hw_is_readonly(sbi)) {
4706 if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4707 err = f2fs_recover_fsync_data(sbi, check_only: true);
4708 if (err > 0) {
4709 err = -EROFS;
4710 f2fs_err(sbi, "Need to recover fsync data, but "
4711 "write access unavailable, please try "
4712 "mount w/ disable_roll_forward or norecovery");
4713 }
4714 if (err < 0)
4715 goto free_meta;
4716 }
4717 f2fs_info(sbi, "write access unavailable, skipping recovery");
4718 goto reset_checkpoint;
4719 }
4720
4721 if (need_fsck)
4722 set_sbi_flag(sbi, type: SBI_NEED_FSCK);
4723
4724 if (skip_recovery)
4725 goto reset_checkpoint;
4726
4727 err = f2fs_recover_fsync_data(sbi, check_only: false);
4728 if (err < 0) {
4729 if (err != -ENOMEM)
4730 skip_recovery = true;
4731 need_fsck = true;
4732 f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4733 err);
4734 goto free_meta;
4735 }
4736 } else {
4737 err = f2fs_recover_fsync_data(sbi, check_only: true);
4738
4739 if (!f2fs_readonly(sb) && err > 0) {
4740 err = -EINVAL;
4741 f2fs_err(sbi, "Need to recover fsync data");
4742 goto free_meta;
4743 }
4744 }
4745
4746#ifdef CONFIG_QUOTA
4747 f2fs_recover_quota_end(sbi, quota_enabled);
4748#endif
4749
4750 /*
4751 * If the f2fs is not readonly and fsync data recovery succeeds,
4752 * check zoned block devices' write pointer consistency.
4753 */
4754 if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4755 err = f2fs_check_write_pointer(sbi);
4756 if (err)
4757 goto free_meta;
4758 }
4759
4760reset_checkpoint:
4761 f2fs_init_inmem_curseg(sbi);
4762
4763 /* f2fs_recover_fsync_data() cleared this already */
4764 clear_sbi_flag(sbi, type: SBI_POR_DOING);
4765
4766 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4767 err = f2fs_disable_checkpoint(sbi);
4768 if (err)
4769 goto sync_free_meta;
4770 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4771 f2fs_enable_checkpoint(sbi);
4772 }
4773
4774 /*
4775 * If filesystem is not mounted as read-only then
4776 * do start the gc_thread.
4777 */
4778 if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4779 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4780 /* After POR, we can run background GC thread.*/
4781 err = f2fs_start_gc_thread(sbi);
4782 if (err)
4783 goto sync_free_meta;
4784 }
4785 kvfree(addr: options);
4786
4787 /* recover broken superblock */
4788 if (recovery) {
4789 err = f2fs_commit_super(sbi, recover: true);
4790 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4791 sbi->valid_super_block ? 1 : 2, err);
4792 }
4793
4794 f2fs_join_shrinker(sbi);
4795
4796 f2fs_tuning_parameters(sbi);
4797
4798 f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4799 cur_cp_version(F2FS_CKPT(sbi)));
4800 f2fs_update_time(sbi, type: CP_TIME);
4801 f2fs_update_time(sbi, type: REQ_TIME);
4802 clear_sbi_flag(sbi, type: SBI_CP_DISABLED_QUICK);
4803 return 0;
4804
4805sync_free_meta:
4806 /* safe to flush all the data */
4807 sync_filesystem(sbi->sb);
4808 retry_cnt = 0;
4809
4810free_meta:
4811#ifdef CONFIG_QUOTA
4812 f2fs_truncate_quota_inode_pages(sb);
4813 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4814 f2fs_quota_off_umount(sb: sbi->sb);
4815#endif
4816 /*
4817 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4818 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4819 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4820 * falls into an infinite loop in f2fs_sync_meta_pages().
4821 */
4822 truncate_inode_pages_final(META_MAPPING(sbi));
4823 /* evict some inodes being cached by GC */
4824 evict_inodes(sb);
4825 f2fs_unregister_sysfs(sbi);
4826free_compress_inode:
4827 f2fs_destroy_compress_inode(sbi);
4828free_root_inode:
4829 dput(sb->s_root);
4830 sb->s_root = NULL;
4831free_node_inode:
4832 f2fs_release_ino_entry(sbi, all: true);
4833 truncate_inode_pages_final(NODE_MAPPING(sbi));
4834 iput(sbi->node_inode);
4835 sbi->node_inode = NULL;
4836free_stats:
4837 f2fs_destroy_stats(sbi);
4838free_nm:
4839 /* stop discard thread before destroying node manager */
4840 f2fs_stop_discard_thread(sbi);
4841 f2fs_destroy_node_manager(sbi);
4842free_sm:
4843 f2fs_destroy_segment_manager(sbi);
4844stop_ckpt_thread:
4845 f2fs_stop_ckpt_thread(sbi);
4846 /* flush s_error_work before sbi destroy */
4847 flush_work(work: &sbi->s_error_work);
4848 f2fs_destroy_post_read_wq(sbi);
4849free_devices:
4850 destroy_device_list(sbi);
4851 kvfree(addr: sbi->ckpt);
4852free_meta_inode:
4853 make_bad_inode(sbi->meta_inode);
4854 iput(sbi->meta_inode);
4855 sbi->meta_inode = NULL;
4856free_page_array_cache:
4857 f2fs_destroy_page_array_cache(sbi);
4858free_xattr_cache:
4859 f2fs_destroy_xattr_caches(sbi);
4860free_io_dummy:
4861 mempool_destroy(pool: sbi->write_io_dummy);
4862free_percpu:
4863 destroy_percpu_info(sbi);
4864free_iostat:
4865 f2fs_destroy_iostat(sbi);
4866free_bio_info:
4867 for (i = 0; i < NR_PAGE_TYPE; i++)
4868 kvfree(addr: sbi->write_io[i]);
4869
4870#if IS_ENABLED(CONFIG_UNICODE)
4871 utf8_unload(um: sb->s_encoding);
4872 sb->s_encoding = NULL;
4873#endif
4874free_options:
4875#ifdef CONFIG_QUOTA
4876 for (i = 0; i < MAXQUOTAS; i++)
4877 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4878#endif
4879 fscrypt_free_dummy_policy(dummy_policy: &F2FS_OPTION(sbi).dummy_enc_policy);
4880 kvfree(addr: options);
4881free_sb_buf:
4882 kfree(objp: raw_super);
4883free_sbi:
4884 if (sbi->s_chksum_driver)
4885 crypto_free_shash(tfm: sbi->s_chksum_driver);
4886 kfree(objp: sbi);
4887
4888 /* give only one another chance */
4889 if (retry_cnt > 0 && skip_recovery) {
4890 retry_cnt--;
4891 shrink_dcache_sb(sb);
4892 goto try_onemore;
4893 }
4894 return err;
4895}
4896
4897static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4898 const char *dev_name, void *data)
4899{
4900 return mount_bdev(fs_type, flags, dev_name, data, fill_super: f2fs_fill_super);
4901}
4902
4903static void kill_f2fs_super(struct super_block *sb)
4904{
4905 if (sb->s_root) {
4906 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4907
4908 set_sbi_flag(sbi, type: SBI_IS_CLOSE);
4909 f2fs_stop_gc_thread(sbi);
4910 f2fs_stop_discard_thread(sbi);
4911
4912#ifdef CONFIG_F2FS_FS_COMPRESSION
4913 /*
4914 * latter evict_inode() can bypass checking and invalidating
4915 * compress inode cache.
4916 */
4917 if (test_opt(sbi, COMPRESS_CACHE))
4918 truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4919#endif
4920
4921 if (is_sbi_flag_set(sbi, type: SBI_IS_DIRTY) ||
4922 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4923 struct cp_control cpc = {
4924 .reason = CP_UMOUNT,
4925 };
4926 stat_inc_cp_call_count(sbi, TOTAL_CALL);
4927 f2fs_write_checkpoint(sbi, cpc: &cpc);
4928 }
4929
4930 if (is_sbi_flag_set(sbi, type: SBI_IS_RECOVERED) && f2fs_readonly(sb))
4931 sb->s_flags &= ~SB_RDONLY;
4932 }
4933 kill_block_super(sb);
4934}
4935
4936static struct file_system_type f2fs_fs_type = {
4937 .owner = THIS_MODULE,
4938 .name = "f2fs",
4939 .mount = f2fs_mount,
4940 .kill_sb = kill_f2fs_super,
4941 .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
4942};
4943MODULE_ALIAS_FS("f2fs");
4944
4945static int __init init_inodecache(void)
4946{
4947 f2fs_inode_cachep = kmem_cache_create(name: "f2fs_inode_cache",
4948 size: sizeof(struct f2fs_inode_info), align: 0,
4949 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4950 return f2fs_inode_cachep ? 0 : -ENOMEM;
4951}
4952
4953static void destroy_inodecache(void)
4954{
4955 /*
4956 * Make sure all delayed rcu free inodes are flushed before we
4957 * destroy cache.
4958 */
4959 rcu_barrier();
4960 kmem_cache_destroy(s: f2fs_inode_cachep);
4961}
4962
4963static int __init init_f2fs_fs(void)
4964{
4965 int err;
4966
4967 if (PAGE_SIZE != F2FS_BLKSIZE) {
4968 printk("F2FS not supported on PAGE_SIZE(%lu) != BLOCK_SIZE(%lu)\n",
4969 PAGE_SIZE, F2FS_BLKSIZE);
4970 return -EINVAL;
4971 }
4972
4973 err = init_inodecache();
4974 if (err)
4975 goto fail;
4976 err = f2fs_create_node_manager_caches();
4977 if (err)
4978 goto free_inodecache;
4979 err = f2fs_create_segment_manager_caches();
4980 if (err)
4981 goto free_node_manager_caches;
4982 err = f2fs_create_checkpoint_caches();
4983 if (err)
4984 goto free_segment_manager_caches;
4985 err = f2fs_create_recovery_cache();
4986 if (err)
4987 goto free_checkpoint_caches;
4988 err = f2fs_create_extent_cache();
4989 if (err)
4990 goto free_recovery_cache;
4991 err = f2fs_create_garbage_collection_cache();
4992 if (err)
4993 goto free_extent_cache;
4994 err = f2fs_init_sysfs();
4995 if (err)
4996 goto free_garbage_collection_cache;
4997 err = f2fs_init_shrinker();
4998 if (err)
4999 goto free_sysfs;
5000 err = register_filesystem(&f2fs_fs_type);
5001 if (err)
5002 goto free_shrinker;
5003 f2fs_create_root_stats();
5004 err = f2fs_init_post_read_processing();
5005 if (err)
5006 goto free_root_stats;
5007 err = f2fs_init_iostat_processing();
5008 if (err)
5009 goto free_post_read;
5010 err = f2fs_init_bio_entry_cache();
5011 if (err)
5012 goto free_iostat;
5013 err = f2fs_init_bioset();
5014 if (err)
5015 goto free_bio_entry_cache;
5016 err = f2fs_init_compress_mempool();
5017 if (err)
5018 goto free_bioset;
5019 err = f2fs_init_compress_cache();
5020 if (err)
5021 goto free_compress_mempool;
5022 err = f2fs_create_casefold_cache();
5023 if (err)
5024 goto free_compress_cache;
5025 return 0;
5026free_compress_cache:
5027 f2fs_destroy_compress_cache();
5028free_compress_mempool:
5029 f2fs_destroy_compress_mempool();
5030free_bioset:
5031 f2fs_destroy_bioset();
5032free_bio_entry_cache:
5033 f2fs_destroy_bio_entry_cache();
5034free_iostat:
5035 f2fs_destroy_iostat_processing();
5036free_post_read:
5037 f2fs_destroy_post_read_processing();
5038free_root_stats:
5039 f2fs_destroy_root_stats();
5040 unregister_filesystem(&f2fs_fs_type);
5041free_shrinker:
5042 f2fs_exit_shrinker();
5043free_sysfs:
5044 f2fs_exit_sysfs();
5045free_garbage_collection_cache:
5046 f2fs_destroy_garbage_collection_cache();
5047free_extent_cache:
5048 f2fs_destroy_extent_cache();
5049free_recovery_cache:
5050 f2fs_destroy_recovery_cache();
5051free_checkpoint_caches:
5052 f2fs_destroy_checkpoint_caches();
5053free_segment_manager_caches:
5054 f2fs_destroy_segment_manager_caches();
5055free_node_manager_caches:
5056 f2fs_destroy_node_manager_caches();
5057free_inodecache:
5058 destroy_inodecache();
5059fail:
5060 return err;
5061}
5062
5063static void __exit exit_f2fs_fs(void)
5064{
5065 f2fs_destroy_casefold_cache();
5066 f2fs_destroy_compress_cache();
5067 f2fs_destroy_compress_mempool();
5068 f2fs_destroy_bioset();
5069 f2fs_destroy_bio_entry_cache();
5070 f2fs_destroy_iostat_processing();
5071 f2fs_destroy_post_read_processing();
5072 f2fs_destroy_root_stats();
5073 unregister_filesystem(&f2fs_fs_type);
5074 f2fs_exit_shrinker();
5075 f2fs_exit_sysfs();
5076 f2fs_destroy_garbage_collection_cache();
5077 f2fs_destroy_extent_cache();
5078 f2fs_destroy_recovery_cache();
5079 f2fs_destroy_checkpoint_caches();
5080 f2fs_destroy_segment_manager_caches();
5081 f2fs_destroy_node_manager_caches();
5082 destroy_inodecache();
5083}
5084
5085module_init(init_f2fs_fs)
5086module_exit(exit_f2fs_fs)
5087
5088MODULE_AUTHOR("Samsung Electronics's Praesto Team");
5089MODULE_DESCRIPTION("Flash Friendly File System");
5090MODULE_LICENSE("GPL");
5091MODULE_SOFTDEP("pre: crc32");
5092
5093

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