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Linux/fs/f2fs/super.c

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  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/statfs.h>
 12 #include <linux/buffer_head.h>
 13 #include <linux/backing-dev.h>
 14 #include <linux/kthread.h>
 15 #include <linux/parser.h>
 16 #include <linux/mount.h>
 17 #include <linux/seq_file.h>
 18 #include <linux/proc_fs.h>
 19 #include <linux/random.h>
 20 #include <linux/exportfs.h>
 21 #include <linux/blkdev.h>
 22 #include <linux/quotaops.h>
 23 #include <linux/f2fs_fs.h>
 24 #include <linux/sysfs.h>
 25 #include <linux/quota.h>
 26 #include <linux/unicode.h>
 27 #include <linux/part_stat.h>
 28 #include <linux/zstd.h>
 29 #include <linux/lz4.h>
 30 
 31 #include "f2fs.h"
 32 #include "node.h"
 33 #include "segment.h"
 34 #include "xattr.h"
 35 #include "gc.h"
 36 #include "iostat.h"
 37 
 38 #define CREATE_TRACE_POINTS
 39 #include <trace/events/f2fs.h>
 40 
 41 static struct kmem_cache *f2fs_inode_cachep;
 42 
 43 #ifdef CONFIG_F2FS_FAULT_INJECTION
 44 
 45 const char *f2fs_fault_name[FAULT_MAX] = {
 46         [FAULT_KMALLOC]         = "kmalloc",
 47         [FAULT_KVMALLOC]        = "kvmalloc",
 48         [FAULT_PAGE_ALLOC]      = "page alloc",
 49         [FAULT_PAGE_GET]        = "page get",
 50         [FAULT_ALLOC_NID]       = "alloc nid",
 51         [FAULT_ORPHAN]          = "orphan",
 52         [FAULT_BLOCK]           = "no more block",
 53         [FAULT_DIR_DEPTH]       = "too big dir depth",
 54         [FAULT_EVICT_INODE]     = "evict_inode fail",
 55         [FAULT_TRUNCATE]        = "truncate fail",
 56         [FAULT_READ_IO]         = "read IO error",
 57         [FAULT_CHECKPOINT]      = "checkpoint error",
 58         [FAULT_DISCARD]         = "discard error",
 59         [FAULT_WRITE_IO]        = "write IO error",
 60         [FAULT_SLAB_ALLOC]      = "slab alloc",
 61 };
 62 
 63 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
 64                                                         unsigned int type)
 65 {
 66         struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
 67 
 68         if (rate) {
 69                 atomic_set(&ffi->inject_ops, 0);
 70                 ffi->inject_rate = rate;
 71         }
 72 
 73         if (type)
 74                 ffi->inject_type = type;
 75 
 76         if (!rate && !type)
 77                 memset(ffi, 0, sizeof(struct f2fs_fault_info));
 78 }
 79 #endif
 80 
 81 /* f2fs-wide shrinker description */
 82 static struct shrinker f2fs_shrinker_info = {
 83         .scan_objects = f2fs_shrink_scan,
 84         .count_objects = f2fs_shrink_count,
 85         .seeks = DEFAULT_SEEKS,
 86 };
 87 
 88 enum {
 89         Opt_gc_background,
 90         Opt_disable_roll_forward,
 91         Opt_norecovery,
 92         Opt_discard,
 93         Opt_nodiscard,
 94         Opt_noheap,
 95         Opt_heap,
 96         Opt_user_xattr,
 97         Opt_nouser_xattr,
 98         Opt_acl,
 99         Opt_noacl,
100         Opt_active_logs,
101         Opt_disable_ext_identify,
102         Opt_inline_xattr,
103         Opt_noinline_xattr,
104         Opt_inline_xattr_size,
105         Opt_inline_data,
106         Opt_inline_dentry,
107         Opt_noinline_dentry,
108         Opt_flush_merge,
109         Opt_noflush_merge,
110         Opt_nobarrier,
111         Opt_fastboot,
112         Opt_extent_cache,
113         Opt_noextent_cache,
114         Opt_noinline_data,
115         Opt_data_flush,
116         Opt_reserve_root,
117         Opt_resgid,
118         Opt_resuid,
119         Opt_mode,
120         Opt_io_size_bits,
121         Opt_fault_injection,
122         Opt_fault_type,
123         Opt_lazytime,
124         Opt_nolazytime,
125         Opt_quota,
126         Opt_noquota,
127         Opt_usrquota,
128         Opt_grpquota,
129         Opt_prjquota,
130         Opt_usrjquota,
131         Opt_grpjquota,
132         Opt_prjjquota,
133         Opt_offusrjquota,
134         Opt_offgrpjquota,
135         Opt_offprjjquota,
136         Opt_jqfmt_vfsold,
137         Opt_jqfmt_vfsv0,
138         Opt_jqfmt_vfsv1,
139         Opt_whint,
140         Opt_alloc,
141         Opt_fsync,
142         Opt_test_dummy_encryption,
143         Opt_inlinecrypt,
144         Opt_checkpoint_disable,
145         Opt_checkpoint_disable_cap,
146         Opt_checkpoint_disable_cap_perc,
147         Opt_checkpoint_enable,
148         Opt_checkpoint_merge,
149         Opt_nocheckpoint_merge,
150         Opt_compress_algorithm,
151         Opt_compress_log_size,
152         Opt_compress_extension,
153         Opt_nocompress_extension,
154         Opt_compress_chksum,
155         Opt_compress_mode,
156         Opt_compress_cache,
157         Opt_atgc,
158         Opt_gc_merge,
159         Opt_nogc_merge,
160         Opt_discard_unit,
161         Opt_err,
162 };
163 
164 static match_table_t f2fs_tokens = {
165         {Opt_gc_background, "background_gc=%s"},
166         {Opt_disable_roll_forward, "disable_roll_forward"},
167         {Opt_norecovery, "norecovery"},
168         {Opt_discard, "discard"},
169         {Opt_nodiscard, "nodiscard"},
170         {Opt_noheap, "no_heap"},
171         {Opt_heap, "heap"},
172         {Opt_user_xattr, "user_xattr"},
173         {Opt_nouser_xattr, "nouser_xattr"},
174         {Opt_acl, "acl"},
175         {Opt_noacl, "noacl"},
176         {Opt_active_logs, "active_logs=%u"},
177         {Opt_disable_ext_identify, "disable_ext_identify"},
178         {Opt_inline_xattr, "inline_xattr"},
179         {Opt_noinline_xattr, "noinline_xattr"},
180         {Opt_inline_xattr_size, "inline_xattr_size=%u"},
181         {Opt_inline_data, "inline_data"},
182         {Opt_inline_dentry, "inline_dentry"},
183         {Opt_noinline_dentry, "noinline_dentry"},
184         {Opt_flush_merge, "flush_merge"},
185         {Opt_noflush_merge, "noflush_merge"},
186         {Opt_nobarrier, "nobarrier"},
187         {Opt_fastboot, "fastboot"},
188         {Opt_extent_cache, "extent_cache"},
189         {Opt_noextent_cache, "noextent_cache"},
190         {Opt_noinline_data, "noinline_data"},
191         {Opt_data_flush, "data_flush"},
192         {Opt_reserve_root, "reserve_root=%u"},
193         {Opt_resgid, "resgid=%u"},
194         {Opt_resuid, "resuid=%u"},
195         {Opt_mode, "mode=%s"},
196         {Opt_io_size_bits, "io_bits=%u"},
197         {Opt_fault_injection, "fault_injection=%u"},
198         {Opt_fault_type, "fault_type=%u"},
199         {Opt_lazytime, "lazytime"},
200         {Opt_nolazytime, "nolazytime"},
201         {Opt_quota, "quota"},
202         {Opt_noquota, "noquota"},
203         {Opt_usrquota, "usrquota"},
204         {Opt_grpquota, "grpquota"},
205         {Opt_prjquota, "prjquota"},
206         {Opt_usrjquota, "usrjquota=%s"},
207         {Opt_grpjquota, "grpjquota=%s"},
208         {Opt_prjjquota, "prjjquota=%s"},
209         {Opt_offusrjquota, "usrjquota="},
210         {Opt_offgrpjquota, "grpjquota="},
211         {Opt_offprjjquota, "prjjquota="},
212         {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
213         {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
214         {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
215         {Opt_whint, "whint_mode=%s"},
216         {Opt_alloc, "alloc_mode=%s"},
217         {Opt_fsync, "fsync_mode=%s"},
218         {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
219         {Opt_test_dummy_encryption, "test_dummy_encryption"},
220         {Opt_inlinecrypt, "inlinecrypt"},
221         {Opt_checkpoint_disable, "checkpoint=disable"},
222         {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
223         {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
224         {Opt_checkpoint_enable, "checkpoint=enable"},
225         {Opt_checkpoint_merge, "checkpoint_merge"},
226         {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
227         {Opt_compress_algorithm, "compress_algorithm=%s"},
228         {Opt_compress_log_size, "compress_log_size=%u"},
229         {Opt_compress_extension, "compress_extension=%s"},
230         {Opt_nocompress_extension, "nocompress_extension=%s"},
231         {Opt_compress_chksum, "compress_chksum"},
232         {Opt_compress_mode, "compress_mode=%s"},
233         {Opt_compress_cache, "compress_cache"},
234         {Opt_atgc, "atgc"},
235         {Opt_gc_merge, "gc_merge"},
236         {Opt_nogc_merge, "nogc_merge"},
237         {Opt_discard_unit, "discard_unit=%s"},
238         {Opt_err, NULL},
239 };
240 
241 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
242 {
243         struct va_format vaf;
244         va_list args;
245         int level;
246 
247         va_start(args, fmt);
248 
249         level = printk_get_level(fmt);
250         vaf.fmt = printk_skip_level(fmt);
251         vaf.va = &args;
252         printk("%c%cF2FS-fs (%s): %pV\n",
253                KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
254 
255         va_end(args);
256 }
257 
258 #ifdef CONFIG_UNICODE
259 static const struct f2fs_sb_encodings {
260         __u16 magic;
261         char *name;
262         char *version;
263 } f2fs_sb_encoding_map[] = {
264         {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
265 };
266 
267 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
268                                  const struct f2fs_sb_encodings **encoding,
269                                  __u16 *flags)
270 {
271         __u16 magic = le16_to_cpu(sb->s_encoding);
272         int i;
273 
274         for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
275                 if (magic == f2fs_sb_encoding_map[i].magic)
276                         break;
277 
278         if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
279                 return -EINVAL;
280 
281         *encoding = &f2fs_sb_encoding_map[i];
282         *flags = le16_to_cpu(sb->s_encoding_flags);
283 
284         return 0;
285 }
286 
287 struct kmem_cache *f2fs_cf_name_slab;
288 static int __init f2fs_create_casefold_cache(void)
289 {
290         f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
291                                                         F2FS_NAME_LEN);
292         if (!f2fs_cf_name_slab)
293                 return -ENOMEM;
294         return 0;
295 }
296 
297 static void f2fs_destroy_casefold_cache(void)
298 {
299         kmem_cache_destroy(f2fs_cf_name_slab);
300 }
301 #else
302 static int __init f2fs_create_casefold_cache(void) { return 0; }
303 static void f2fs_destroy_casefold_cache(void) { }
304 #endif
305 
306 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
307 {
308         block_t limit = min((sbi->user_block_count << 1) / 1000,
309                         sbi->user_block_count - sbi->reserved_blocks);
310 
311         /* limit is 0.2% */
312         if (test_opt(sbi, RESERVE_ROOT) &&
313                         F2FS_OPTION(sbi).root_reserved_blocks > limit) {
314                 F2FS_OPTION(sbi).root_reserved_blocks = limit;
315                 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
316                           F2FS_OPTION(sbi).root_reserved_blocks);
317         }
318         if (!test_opt(sbi, RESERVE_ROOT) &&
319                 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
320                                 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
321                 !gid_eq(F2FS_OPTION(sbi).s_resgid,
322                                 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
323                 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
324                           from_kuid_munged(&init_user_ns,
325                                            F2FS_OPTION(sbi).s_resuid),
326                           from_kgid_munged(&init_user_ns,
327                                            F2FS_OPTION(sbi).s_resgid));
328 }
329 
330 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
331 {
332         if (!F2FS_OPTION(sbi).unusable_cap_perc)
333                 return;
334 
335         if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
336                 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
337         else
338                 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
339                                         F2FS_OPTION(sbi).unusable_cap_perc;
340 
341         f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
342                         F2FS_OPTION(sbi).unusable_cap,
343                         F2FS_OPTION(sbi).unusable_cap_perc);
344 }
345 
346 static void init_once(void *foo)
347 {
348         struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
349 
350         inode_init_once(&fi->vfs_inode);
351 }
352 
353 #ifdef CONFIG_QUOTA
354 static const char * const quotatypes[] = INITQFNAMES;
355 #define QTYPE2NAME(t) (quotatypes[t])
356 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
357                                                         substring_t *args)
358 {
359         struct f2fs_sb_info *sbi = F2FS_SB(sb);
360         char *qname;
361         int ret = -EINVAL;
362 
363         if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
364                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
365                 return -EINVAL;
366         }
367         if (f2fs_sb_has_quota_ino(sbi)) {
368                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
369                 return 0;
370         }
371 
372         qname = match_strdup(args);
373         if (!qname) {
374                 f2fs_err(sbi, "Not enough memory for storing quotafile name");
375                 return -ENOMEM;
376         }
377         if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
378                 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
379                         ret = 0;
380                 else
381                         f2fs_err(sbi, "%s quota file already specified",
382                                  QTYPE2NAME(qtype));
383                 goto errout;
384         }
385         if (strchr(qname, '/')) {
386                 f2fs_err(sbi, "quotafile must be on filesystem root");
387                 goto errout;
388         }
389         F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
390         set_opt(sbi, QUOTA);
391         return 0;
392 errout:
393         kfree(qname);
394         return ret;
395 }
396 
397 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
398 {
399         struct f2fs_sb_info *sbi = F2FS_SB(sb);
400 
401         if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
402                 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
403                 return -EINVAL;
404         }
405         kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
406         F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
407         return 0;
408 }
409 
410 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
411 {
412         /*
413          * We do the test below only for project quotas. 'usrquota' and
414          * 'grpquota' mount options are allowed even without quota feature
415          * to support legacy quotas in quota files.
416          */
417         if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
418                 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
419                 return -1;
420         }
421         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
422                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
423                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
424                 if (test_opt(sbi, USRQUOTA) &&
425                                 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
426                         clear_opt(sbi, USRQUOTA);
427 
428                 if (test_opt(sbi, GRPQUOTA) &&
429                                 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
430                         clear_opt(sbi, GRPQUOTA);
431 
432                 if (test_opt(sbi, PRJQUOTA) &&
433                                 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
434                         clear_opt(sbi, PRJQUOTA);
435 
436                 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
437                                 test_opt(sbi, PRJQUOTA)) {
438                         f2fs_err(sbi, "old and new quota format mixing");
439                         return -1;
440                 }
441 
442                 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
443                         f2fs_err(sbi, "journaled quota format not specified");
444                         return -1;
445                 }
446         }
447 
448         if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
449                 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
450                 F2FS_OPTION(sbi).s_jquota_fmt = 0;
451         }
452         return 0;
453 }
454 #endif
455 
456 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
457                                           const char *opt,
458                                           const substring_t *arg,
459                                           bool is_remount)
460 {
461         struct f2fs_sb_info *sbi = F2FS_SB(sb);
462 #ifdef CONFIG_FS_ENCRYPTION
463         int err;
464 
465         if (!f2fs_sb_has_encrypt(sbi)) {
466                 f2fs_err(sbi, "Encrypt feature is off");
467                 return -EINVAL;
468         }
469 
470         /*
471          * This mount option is just for testing, and it's not worthwhile to
472          * implement the extra complexity (e.g. RCU protection) that would be
473          * needed to allow it to be set or changed during remount.  We do allow
474          * it to be specified during remount, but only if there is no change.
475          */
476         if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
477                 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
478                 return -EINVAL;
479         }
480         err = fscrypt_set_test_dummy_encryption(
481                 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
482         if (err) {
483                 if (err == -EEXIST)
484                         f2fs_warn(sbi,
485                                   "Can't change test_dummy_encryption on remount");
486                 else if (err == -EINVAL)
487                         f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
488                                   opt);
489                 else
490                         f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
491                                   opt, err);
492                 return -EINVAL;
493         }
494         f2fs_warn(sbi, "Test dummy encryption mode enabled");
495 #else
496         f2fs_warn(sbi, "Test dummy encryption mount option ignored");
497 #endif
498         return 0;
499 }
500 
501 #ifdef CONFIG_F2FS_FS_COMPRESSION
502 /*
503  * 1. The same extension name cannot not appear in both compress and non-compress extension
504  * at the same time.
505  * 2. If the compress extension specifies all files, the types specified by the non-compress
506  * extension will be treated as special cases and will not be compressed.
507  * 3. Don't allow the non-compress extension specifies all files.
508  */
509 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
510 {
511         unsigned char (*ext)[F2FS_EXTENSION_LEN];
512         unsigned char (*noext)[F2FS_EXTENSION_LEN];
513         int ext_cnt, noext_cnt, index = 0, no_index = 0;
514 
515         ext = F2FS_OPTION(sbi).extensions;
516         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
517         noext = F2FS_OPTION(sbi).noextensions;
518         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
519 
520         if (!noext_cnt)
521                 return 0;
522 
523         for (no_index = 0; no_index < noext_cnt; no_index++) {
524                 if (!strcasecmp("*", noext[no_index])) {
525                         f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
526                         return -EINVAL;
527                 }
528                 for (index = 0; index < ext_cnt; index++) {
529                         if (!strcasecmp(ext[index], noext[no_index])) {
530                                 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
531                                                 ext[index]);
532                                 return -EINVAL;
533                         }
534                 }
535         }
536         return 0;
537 }
538 
539 #ifdef CONFIG_F2FS_FS_LZ4
540 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
541 {
542 #ifdef CONFIG_F2FS_FS_LZ4HC
543         unsigned int level;
544 #endif
545 
546         if (strlen(str) == 3) {
547                 F2FS_OPTION(sbi).compress_level = 0;
548                 return 0;
549         }
550 
551 #ifdef CONFIG_F2FS_FS_LZ4HC
552         str += 3;
553 
554         if (str[0] != ':') {
555                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
556                 return -EINVAL;
557         }
558         if (kstrtouint(str + 1, 10, &level))
559                 return -EINVAL;
560 
561         if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
562                 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
563                 return -EINVAL;
564         }
565 
566         F2FS_OPTION(sbi).compress_level = level;
567         return 0;
568 #else
569         f2fs_info(sbi, "kernel doesn't support lz4hc compression");
570         return -EINVAL;
571 #endif
572 }
573 #endif
574 
575 #ifdef CONFIG_F2FS_FS_ZSTD
576 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
577 {
578         unsigned int level;
579         int len = 4;
580 
581         if (strlen(str) == len) {
582                 F2FS_OPTION(sbi).compress_level = 0;
583                 return 0;
584         }
585 
586         str += len;
587 
588         if (str[0] != ':') {
589                 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
590                 return -EINVAL;
591         }
592         if (kstrtouint(str + 1, 10, &level))
593                 return -EINVAL;
594 
595         if (!level || level > ZSTD_maxCLevel()) {
596                 f2fs_info(sbi, "invalid zstd compress level: %d", level);
597                 return -EINVAL;
598         }
599 
600         F2FS_OPTION(sbi).compress_level = level;
601         return 0;
602 }
603 #endif
604 #endif
605 
606 static int parse_options(struct super_block *sb, char *options, bool is_remount)
607 {
608         struct f2fs_sb_info *sbi = F2FS_SB(sb);
609         substring_t args[MAX_OPT_ARGS];
610 #ifdef CONFIG_F2FS_FS_COMPRESSION
611         unsigned char (*ext)[F2FS_EXTENSION_LEN];
612         unsigned char (*noext)[F2FS_EXTENSION_LEN];
613         int ext_cnt, noext_cnt;
614 #endif
615         char *p, *name;
616         int arg = 0;
617         kuid_t uid;
618         kgid_t gid;
619         int ret;
620 
621         if (!options)
622                 goto default_check;
623 
624         while ((p = strsep(&options, ",")) != NULL) {
625                 int token;
626 
627                 if (!*p)
628                         continue;
629                 /*
630                  * Initialize args struct so we know whether arg was
631                  * found; some options take optional arguments.
632                  */
633                 args[0].to = args[0].from = NULL;
634                 token = match_token(p, f2fs_tokens, args);
635 
636                 switch (token) {
637                 case Opt_gc_background:
638                         name = match_strdup(&args[0]);
639 
640                         if (!name)
641                                 return -ENOMEM;
642                         if (!strcmp(name, "on")) {
643                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
644                         } else if (!strcmp(name, "off")) {
645                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
646                         } else if (!strcmp(name, "sync")) {
647                                 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
648                         } else {
649                                 kfree(name);
650                                 return -EINVAL;
651                         }
652                         kfree(name);
653                         break;
654                 case Opt_disable_roll_forward:
655                         set_opt(sbi, DISABLE_ROLL_FORWARD);
656                         break;
657                 case Opt_norecovery:
658                         /* this option mounts f2fs with ro */
659                         set_opt(sbi, NORECOVERY);
660                         if (!f2fs_readonly(sb))
661                                 return -EINVAL;
662                         break;
663                 case Opt_discard:
664                         if (!f2fs_hw_support_discard(sbi)) {
665                                 f2fs_warn(sbi, "device does not support discard");
666                                 break;
667                         }
668                         set_opt(sbi, DISCARD);
669                         break;
670                 case Opt_nodiscard:
671                         if (f2fs_hw_should_discard(sbi)) {
672                                 f2fs_warn(sbi, "discard is required for zoned block devices");
673                                 return -EINVAL;
674                         }
675                         clear_opt(sbi, DISCARD);
676                         break;
677                 case Opt_noheap:
678                         set_opt(sbi, NOHEAP);
679                         break;
680                 case Opt_heap:
681                         clear_opt(sbi, NOHEAP);
682                         break;
683 #ifdef CONFIG_F2FS_FS_XATTR
684                 case Opt_user_xattr:
685                         set_opt(sbi, XATTR_USER);
686                         break;
687                 case Opt_nouser_xattr:
688                         clear_opt(sbi, XATTR_USER);
689                         break;
690                 case Opt_inline_xattr:
691                         set_opt(sbi, INLINE_XATTR);
692                         break;
693                 case Opt_noinline_xattr:
694                         clear_opt(sbi, INLINE_XATTR);
695                         break;
696                 case Opt_inline_xattr_size:
697                         if (args->from && match_int(args, &arg))
698                                 return -EINVAL;
699                         set_opt(sbi, INLINE_XATTR_SIZE);
700                         F2FS_OPTION(sbi).inline_xattr_size = arg;
701                         break;
702 #else
703                 case Opt_user_xattr:
704                         f2fs_info(sbi, "user_xattr options not supported");
705                         break;
706                 case Opt_nouser_xattr:
707                         f2fs_info(sbi, "nouser_xattr options not supported");
708                         break;
709                 case Opt_inline_xattr:
710                         f2fs_info(sbi, "inline_xattr options not supported");
711                         break;
712                 case Opt_noinline_xattr:
713                         f2fs_info(sbi, "noinline_xattr options not supported");
714                         break;
715 #endif
716 #ifdef CONFIG_F2FS_FS_POSIX_ACL
717                 case Opt_acl:
718                         set_opt(sbi, POSIX_ACL);
719                         break;
720                 case Opt_noacl:
721                         clear_opt(sbi, POSIX_ACL);
722                         break;
723 #else
724                 case Opt_acl:
725                         f2fs_info(sbi, "acl options not supported");
726                         break;
727                 case Opt_noacl:
728                         f2fs_info(sbi, "noacl options not supported");
729                         break;
730 #endif
731                 case Opt_active_logs:
732                         if (args->from && match_int(args, &arg))
733                                 return -EINVAL;
734                         if (arg != 2 && arg != 4 &&
735                                 arg != NR_CURSEG_PERSIST_TYPE)
736                                 return -EINVAL;
737                         F2FS_OPTION(sbi).active_logs = arg;
738                         break;
739                 case Opt_disable_ext_identify:
740                         set_opt(sbi, DISABLE_EXT_IDENTIFY);
741                         break;
742                 case Opt_inline_data:
743                         set_opt(sbi, INLINE_DATA);
744                         break;
745                 case Opt_inline_dentry:
746                         set_opt(sbi, INLINE_DENTRY);
747                         break;
748                 case Opt_noinline_dentry:
749                         clear_opt(sbi, INLINE_DENTRY);
750                         break;
751                 case Opt_flush_merge:
752                         set_opt(sbi, FLUSH_MERGE);
753                         break;
754                 case Opt_noflush_merge:
755                         clear_opt(sbi, FLUSH_MERGE);
756                         break;
757                 case Opt_nobarrier:
758                         set_opt(sbi, NOBARRIER);
759                         break;
760                 case Opt_fastboot:
761                         set_opt(sbi, FASTBOOT);
762                         break;
763                 case Opt_extent_cache:
764                         set_opt(sbi, EXTENT_CACHE);
765                         break;
766                 case Opt_noextent_cache:
767                         clear_opt(sbi, EXTENT_CACHE);
768                         break;
769                 case Opt_noinline_data:
770                         clear_opt(sbi, INLINE_DATA);
771                         break;
772                 case Opt_data_flush:
773                         set_opt(sbi, DATA_FLUSH);
774                         break;
775                 case Opt_reserve_root:
776                         if (args->from && match_int(args, &arg))
777                                 return -EINVAL;
778                         if (test_opt(sbi, RESERVE_ROOT)) {
779                                 f2fs_info(sbi, "Preserve previous reserve_root=%u",
780                                           F2FS_OPTION(sbi).root_reserved_blocks);
781                         } else {
782                                 F2FS_OPTION(sbi).root_reserved_blocks = arg;
783                                 set_opt(sbi, RESERVE_ROOT);
784                         }
785                         break;
786                 case Opt_resuid:
787                         if (args->from && match_int(args, &arg))
788                                 return -EINVAL;
789                         uid = make_kuid(current_user_ns(), arg);
790                         if (!uid_valid(uid)) {
791                                 f2fs_err(sbi, "Invalid uid value %d", arg);
792                                 return -EINVAL;
793                         }
794                         F2FS_OPTION(sbi).s_resuid = uid;
795                         break;
796                 case Opt_resgid:
797                         if (args->from && match_int(args, &arg))
798                                 return -EINVAL;
799                         gid = make_kgid(current_user_ns(), arg);
800                         if (!gid_valid(gid)) {
801                                 f2fs_err(sbi, "Invalid gid value %d", arg);
802                                 return -EINVAL;
803                         }
804                         F2FS_OPTION(sbi).s_resgid = gid;
805                         break;
806                 case Opt_mode:
807                         name = match_strdup(&args[0]);
808 
809                         if (!name)
810                                 return -ENOMEM;
811                         if (!strcmp(name, "adaptive")) {
812                                 if (f2fs_sb_has_blkzoned(sbi)) {
813                                         f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
814                                         kfree(name);
815                                         return -EINVAL;
816                                 }
817                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
818                         } else if (!strcmp(name, "lfs")) {
819                                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
820                         } else {
821                                 kfree(name);
822                                 return -EINVAL;
823                         }
824                         kfree(name);
825                         break;
826                 case Opt_io_size_bits:
827                         if (args->from && match_int(args, &arg))
828                                 return -EINVAL;
829                         if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_VECS)) {
830                                 f2fs_warn(sbi, "Not support %d, larger than %d",
831                                           1 << arg, BIO_MAX_VECS);
832                                 return -EINVAL;
833                         }
834                         F2FS_OPTION(sbi).write_io_size_bits = arg;
835                         break;
836 #ifdef CONFIG_F2FS_FAULT_INJECTION
837                 case Opt_fault_injection:
838                         if (args->from && match_int(args, &arg))
839                                 return -EINVAL;
840                         f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
841                         set_opt(sbi, FAULT_INJECTION);
842                         break;
843 
844                 case Opt_fault_type:
845                         if (args->from && match_int(args, &arg))
846                                 return -EINVAL;
847                         f2fs_build_fault_attr(sbi, 0, arg);
848                         set_opt(sbi, FAULT_INJECTION);
849                         break;
850 #else
851                 case Opt_fault_injection:
852                         f2fs_info(sbi, "fault_injection options not supported");
853                         break;
854 
855                 case Opt_fault_type:
856                         f2fs_info(sbi, "fault_type options not supported");
857                         break;
858 #endif
859                 case Opt_lazytime:
860                         sb->s_flags |= SB_LAZYTIME;
861                         break;
862                 case Opt_nolazytime:
863                         sb->s_flags &= ~SB_LAZYTIME;
864                         break;
865 #ifdef CONFIG_QUOTA
866                 case Opt_quota:
867                 case Opt_usrquota:
868                         set_opt(sbi, USRQUOTA);
869                         break;
870                 case Opt_grpquota:
871                         set_opt(sbi, GRPQUOTA);
872                         break;
873                 case Opt_prjquota:
874                         set_opt(sbi, PRJQUOTA);
875                         break;
876                 case Opt_usrjquota:
877                         ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
878                         if (ret)
879                                 return ret;
880                         break;
881                 case Opt_grpjquota:
882                         ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
883                         if (ret)
884                                 return ret;
885                         break;
886                 case Opt_prjjquota:
887                         ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
888                         if (ret)
889                                 return ret;
890                         break;
891                 case Opt_offusrjquota:
892                         ret = f2fs_clear_qf_name(sb, USRQUOTA);
893                         if (ret)
894                                 return ret;
895                         break;
896                 case Opt_offgrpjquota:
897                         ret = f2fs_clear_qf_name(sb, GRPQUOTA);
898                         if (ret)
899                                 return ret;
900                         break;
901                 case Opt_offprjjquota:
902                         ret = f2fs_clear_qf_name(sb, PRJQUOTA);
903                         if (ret)
904                                 return ret;
905                         break;
906                 case Opt_jqfmt_vfsold:
907                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
908                         break;
909                 case Opt_jqfmt_vfsv0:
910                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
911                         break;
912                 case Opt_jqfmt_vfsv1:
913                         F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
914                         break;
915                 case Opt_noquota:
916                         clear_opt(sbi, QUOTA);
917                         clear_opt(sbi, USRQUOTA);
918                         clear_opt(sbi, GRPQUOTA);
919                         clear_opt(sbi, PRJQUOTA);
920                         break;
921 #else
922                 case Opt_quota:
923                 case Opt_usrquota:
924                 case Opt_grpquota:
925                 case Opt_prjquota:
926                 case Opt_usrjquota:
927                 case Opt_grpjquota:
928                 case Opt_prjjquota:
929                 case Opt_offusrjquota:
930                 case Opt_offgrpjquota:
931                 case Opt_offprjjquota:
932                 case Opt_jqfmt_vfsold:
933                 case Opt_jqfmt_vfsv0:
934                 case Opt_jqfmt_vfsv1:
935                 case Opt_noquota:
936                         f2fs_info(sbi, "quota operations not supported");
937                         break;
938 #endif
939                 case Opt_whint:
940                         name = match_strdup(&args[0]);
941                         if (!name)
942                                 return -ENOMEM;
943                         if (!strcmp(name, "user-based")) {
944                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
945                         } else if (!strcmp(name, "off")) {
946                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
947                         } else if (!strcmp(name, "fs-based")) {
948                                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
949                         } else {
950                                 kfree(name);
951                                 return -EINVAL;
952                         }
953                         kfree(name);
954                         break;
955                 case Opt_alloc:
956                         name = match_strdup(&args[0]);
957                         if (!name)
958                                 return -ENOMEM;
959 
960                         if (!strcmp(name, "default")) {
961                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
962                         } else if (!strcmp(name, "reuse")) {
963                                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
964                         } else {
965                                 kfree(name);
966                                 return -EINVAL;
967                         }
968                         kfree(name);
969                         break;
970                 case Opt_fsync:
971                         name = match_strdup(&args[0]);
972                         if (!name)
973                                 return -ENOMEM;
974                         if (!strcmp(name, "posix")) {
975                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
976                         } else if (!strcmp(name, "strict")) {
977                                 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
978                         } else if (!strcmp(name, "nobarrier")) {
979                                 F2FS_OPTION(sbi).fsync_mode =
980                                                         FSYNC_MODE_NOBARRIER;
981                         } else {
982                                 kfree(name);
983                                 return -EINVAL;
984                         }
985                         kfree(name);
986                         break;
987                 case Opt_test_dummy_encryption:
988                         ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
989                                                              is_remount);
990                         if (ret)
991                                 return ret;
992                         break;
993                 case Opt_inlinecrypt:
994 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
995                         sb->s_flags |= SB_INLINECRYPT;
996 #else
997                         f2fs_info(sbi, "inline encryption not supported");
998 #endif
999                         break;
1000                 case Opt_checkpoint_disable_cap_perc:
1001                         if (args->from && match_int(args, &arg))
1002                                 return -EINVAL;
1003                         if (arg < 0 || arg > 100)
1004                                 return -EINVAL;
1005                         F2FS_OPTION(sbi).unusable_cap_perc = arg;
1006                         set_opt(sbi, DISABLE_CHECKPOINT);
1007                         break;
1008                 case Opt_checkpoint_disable_cap:
1009                         if (args->from && match_int(args, &arg))
1010                                 return -EINVAL;
1011                         F2FS_OPTION(sbi).unusable_cap = arg;
1012                         set_opt(sbi, DISABLE_CHECKPOINT);
1013                         break;
1014                 case Opt_checkpoint_disable:
1015                         set_opt(sbi, DISABLE_CHECKPOINT);
1016                         break;
1017                 case Opt_checkpoint_enable:
1018                         clear_opt(sbi, DISABLE_CHECKPOINT);
1019                         break;
1020                 case Opt_checkpoint_merge:
1021                         set_opt(sbi, MERGE_CHECKPOINT);
1022                         break;
1023                 case Opt_nocheckpoint_merge:
1024                         clear_opt(sbi, MERGE_CHECKPOINT);
1025                         break;
1026 #ifdef CONFIG_F2FS_FS_COMPRESSION
1027                 case Opt_compress_algorithm:
1028                         if (!f2fs_sb_has_compression(sbi)) {
1029                                 f2fs_info(sbi, "Image doesn't support compression");
1030                                 break;
1031                         }
1032                         name = match_strdup(&args[0]);
1033                         if (!name)
1034                                 return -ENOMEM;
1035                         if (!strcmp(name, "lzo")) {
1036 #ifdef CONFIG_F2FS_FS_LZO
1037                                 F2FS_OPTION(sbi).compress_level = 0;
1038                                 F2FS_OPTION(sbi).compress_algorithm =
1039                                                                 COMPRESS_LZO;
1040 #else
1041                                 f2fs_info(sbi, "kernel doesn't support lzo compression");
1042 #endif
1043                         } else if (!strncmp(name, "lz4", 3)) {
1044 #ifdef CONFIG_F2FS_FS_LZ4
1045                                 ret = f2fs_set_lz4hc_level(sbi, name);
1046                                 if (ret) {
1047                                         kfree(name);
1048                                         return -EINVAL;
1049                                 }
1050                                 F2FS_OPTION(sbi).compress_algorithm =
1051                                                                 COMPRESS_LZ4;
1052 #else
1053                                 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1054 #endif
1055                         } else if (!strncmp(name, "zstd", 4)) {
1056 #ifdef CONFIG_F2FS_FS_ZSTD
1057                                 ret = f2fs_set_zstd_level(sbi, name);
1058                                 if (ret) {
1059                                         kfree(name);
1060                                         return -EINVAL;
1061                                 }
1062                                 F2FS_OPTION(sbi).compress_algorithm =
1063                                                                 COMPRESS_ZSTD;
1064 #else
1065                                 f2fs_info(sbi, "kernel doesn't support zstd compression");
1066 #endif
1067                         } else if (!strcmp(name, "lzo-rle")) {
1068 #ifdef CONFIG_F2FS_FS_LZORLE
1069                                 F2FS_OPTION(sbi).compress_level = 0;
1070                                 F2FS_OPTION(sbi).compress_algorithm =
1071                                                                 COMPRESS_LZORLE;
1072 #else
1073                                 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1074 #endif
1075                         } else {
1076                                 kfree(name);
1077                                 return -EINVAL;
1078                         }
1079                         kfree(name);
1080                         break;
1081                 case Opt_compress_log_size:
1082                         if (!f2fs_sb_has_compression(sbi)) {
1083                                 f2fs_info(sbi, "Image doesn't support compression");
1084                                 break;
1085                         }
1086                         if (args->from && match_int(args, &arg))
1087                                 return -EINVAL;
1088                         if (arg < MIN_COMPRESS_LOG_SIZE ||
1089                                 arg > MAX_COMPRESS_LOG_SIZE) {
1090                                 f2fs_err(sbi,
1091                                         "Compress cluster log size is out of range");
1092                                 return -EINVAL;
1093                         }
1094                         F2FS_OPTION(sbi).compress_log_size = arg;
1095                         break;
1096                 case Opt_compress_extension:
1097                         if (!f2fs_sb_has_compression(sbi)) {
1098                                 f2fs_info(sbi, "Image doesn't support compression");
1099                                 break;
1100                         }
1101                         name = match_strdup(&args[0]);
1102                         if (!name)
1103                                 return -ENOMEM;
1104 
1105                         ext = F2FS_OPTION(sbi).extensions;
1106                         ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1107 
1108                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1109                                 ext_cnt >= COMPRESS_EXT_NUM) {
1110                                 f2fs_err(sbi,
1111                                         "invalid extension length/number");
1112                                 kfree(name);
1113                                 return -EINVAL;
1114                         }
1115 
1116                         strcpy(ext[ext_cnt], name);
1117                         F2FS_OPTION(sbi).compress_ext_cnt++;
1118                         kfree(name);
1119                         break;
1120                 case Opt_nocompress_extension:
1121                         if (!f2fs_sb_has_compression(sbi)) {
1122                                 f2fs_info(sbi, "Image doesn't support compression");
1123                                 break;
1124                         }
1125                         name = match_strdup(&args[0]);
1126                         if (!name)
1127                                 return -ENOMEM;
1128 
1129                         noext = F2FS_OPTION(sbi).noextensions;
1130                         noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1131 
1132                         if (strlen(name) >= F2FS_EXTENSION_LEN ||
1133                                 noext_cnt >= COMPRESS_EXT_NUM) {
1134                                 f2fs_err(sbi,
1135                                         "invalid extension length/number");
1136                                 kfree(name);
1137                                 return -EINVAL;
1138                         }
1139 
1140                         strcpy(noext[noext_cnt], name);
1141                         F2FS_OPTION(sbi).nocompress_ext_cnt++;
1142                         kfree(name);
1143                         break;
1144                 case Opt_compress_chksum:
1145                         F2FS_OPTION(sbi).compress_chksum = true;
1146                         break;
1147                 case Opt_compress_mode:
1148                         name = match_strdup(&args[0]);
1149                         if (!name)
1150                                 return -ENOMEM;
1151                         if (!strcmp(name, "fs")) {
1152                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1153                         } else if (!strcmp(name, "user")) {
1154                                 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1155                         } else {
1156                                 kfree(name);
1157                                 return -EINVAL;
1158                         }
1159                         kfree(name);
1160                         break;
1161                 case Opt_compress_cache:
1162                         set_opt(sbi, COMPRESS_CACHE);
1163                         break;
1164 #else
1165                 case Opt_compress_algorithm:
1166                 case Opt_compress_log_size:
1167                 case Opt_compress_extension:
1168                 case Opt_nocompress_extension:
1169                 case Opt_compress_chksum:
1170                 case Opt_compress_mode:
1171                 case Opt_compress_cache:
1172                         f2fs_info(sbi, "compression options not supported");
1173                         break;
1174 #endif
1175                 case Opt_atgc:
1176                         set_opt(sbi, ATGC);
1177                         break;
1178                 case Opt_gc_merge:
1179                         set_opt(sbi, GC_MERGE);
1180                         break;
1181                 case Opt_nogc_merge:
1182                         clear_opt(sbi, GC_MERGE);
1183                         break;
1184                 case Opt_discard_unit:
1185                         name = match_strdup(&args[0]);
1186                         if (!name)
1187                                 return -ENOMEM;
1188                         if (!strcmp(name, "block")) {
1189                                 F2FS_OPTION(sbi).discard_unit =
1190                                                 DISCARD_UNIT_BLOCK;
1191                         } else if (!strcmp(name, "segment")) {
1192                                 F2FS_OPTION(sbi).discard_unit =
1193                                                 DISCARD_UNIT_SEGMENT;
1194                         } else if (!strcmp(name, "section")) {
1195                                 F2FS_OPTION(sbi).discard_unit =
1196                                                 DISCARD_UNIT_SECTION;
1197                         } else {
1198                                 kfree(name);
1199                                 return -EINVAL;
1200                         }
1201                         kfree(name);
1202                         break;
1203                 default:
1204                         f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1205                                  p);
1206                         return -EINVAL;
1207                 }
1208         }
1209 default_check:
1210 #ifdef CONFIG_QUOTA
1211         if (f2fs_check_quota_options(sbi))
1212                 return -EINVAL;
1213 #else
1214         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1215                 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1216                 return -EINVAL;
1217         }
1218         if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1219                 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1220                 return -EINVAL;
1221         }
1222 #endif
1223 #ifndef CONFIG_UNICODE
1224         if (f2fs_sb_has_casefold(sbi)) {
1225                 f2fs_err(sbi,
1226                         "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1227                 return -EINVAL;
1228         }
1229 #endif
1230         /*
1231          * The BLKZONED feature indicates that the drive was formatted with
1232          * zone alignment optimization. This is optional for host-aware
1233          * devices, but mandatory for host-managed zoned block devices.
1234          */
1235 #ifndef CONFIG_BLK_DEV_ZONED
1236         if (f2fs_sb_has_blkzoned(sbi)) {
1237                 f2fs_err(sbi, "Zoned block device support is not enabled");
1238                 return -EINVAL;
1239         }
1240 #endif
1241         if (f2fs_sb_has_blkzoned(sbi)) {
1242                 if (F2FS_OPTION(sbi).discard_unit !=
1243                                                 DISCARD_UNIT_SECTION) {
1244                         f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1245                         F2FS_OPTION(sbi).discard_unit =
1246                                         DISCARD_UNIT_SECTION;
1247                 }
1248         }
1249 
1250 #ifdef CONFIG_F2FS_FS_COMPRESSION
1251         if (f2fs_test_compress_extension(sbi)) {
1252                 f2fs_err(sbi, "invalid compress or nocompress extension");
1253                 return -EINVAL;
1254         }
1255 #endif
1256 
1257         if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1258                 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1259                          F2FS_IO_SIZE_KB(sbi));
1260                 return -EINVAL;
1261         }
1262 
1263         if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1264                 int min_size, max_size;
1265 
1266                 if (!f2fs_sb_has_extra_attr(sbi) ||
1267                         !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1268                         f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1269                         return -EINVAL;
1270                 }
1271                 if (!test_opt(sbi, INLINE_XATTR)) {
1272                         f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1273                         return -EINVAL;
1274                 }
1275 
1276                 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1277                 max_size = MAX_INLINE_XATTR_SIZE;
1278 
1279                 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1280                                 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1281                         f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1282                                  min_size, max_size);
1283                         return -EINVAL;
1284                 }
1285         }
1286 
1287         if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1288                 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1289                 return -EINVAL;
1290         }
1291 
1292         /* Not pass down write hints if the number of active logs is lesser
1293          * than NR_CURSEG_PERSIST_TYPE.
1294          */
1295         if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
1296                 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1297 
1298         if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1299                 f2fs_err(sbi, "Allow to mount readonly mode only");
1300                 return -EROFS;
1301         }
1302         return 0;
1303 }
1304 
1305 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1306 {
1307         struct f2fs_inode_info *fi;
1308 
1309         fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep,
1310                                 GFP_F2FS_ZERO, false, F2FS_SB(sb));
1311         if (!fi)
1312                 return NULL;
1313 
1314         init_once((void *) fi);
1315 
1316         /* Initialize f2fs-specific inode info */
1317         atomic_set(&fi->dirty_pages, 0);
1318         atomic_set(&fi->i_compr_blocks, 0);
1319         init_rwsem(&fi->i_sem);
1320         spin_lock_init(&fi->i_size_lock);
1321         INIT_LIST_HEAD(&fi->dirty_list);
1322         INIT_LIST_HEAD(&fi->gdirty_list);
1323         INIT_LIST_HEAD(&fi->inmem_ilist);
1324         INIT_LIST_HEAD(&fi->inmem_pages);
1325         mutex_init(&fi->inmem_lock);
1326         init_rwsem(&fi->i_gc_rwsem[READ]);
1327         init_rwsem(&fi->i_gc_rwsem[WRITE]);
1328         init_rwsem(&fi->i_xattr_sem);
1329 
1330         /* Will be used by directory only */
1331         fi->i_dir_level = F2FS_SB(sb)->dir_level;
1332 
1333         return &fi->vfs_inode;
1334 }
1335 
1336 static int f2fs_drop_inode(struct inode *inode)
1337 {
1338         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1339         int ret;
1340 
1341         /*
1342          * during filesystem shutdown, if checkpoint is disabled,
1343          * drop useless meta/node dirty pages.
1344          */
1345         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1346                 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1347                         inode->i_ino == F2FS_META_INO(sbi)) {
1348                         trace_f2fs_drop_inode(inode, 1);
1349                         return 1;
1350                 }
1351         }
1352 
1353         /*
1354          * This is to avoid a deadlock condition like below.
1355          * writeback_single_inode(inode)
1356          *  - f2fs_write_data_page
1357          *    - f2fs_gc -> iput -> evict
1358          *       - inode_wait_for_writeback(inode)
1359          */
1360         if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1361                 if (!inode->i_nlink && !is_bad_inode(inode)) {
1362                         /* to avoid evict_inode call simultaneously */
1363                         atomic_inc(&inode->i_count);
1364                         spin_unlock(&inode->i_lock);
1365 
1366                         /* some remained atomic pages should discarded */
1367                         if (f2fs_is_atomic_file(inode))
1368                                 f2fs_drop_inmem_pages(inode);
1369 
1370                         /* should remain fi->extent_tree for writepage */
1371                         f2fs_destroy_extent_node(inode);
1372 
1373                         sb_start_intwrite(inode->i_sb);
1374                         f2fs_i_size_write(inode, 0);
1375 
1376                         f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1377                                         inode, NULL, 0, DATA);
1378                         truncate_inode_pages_final(inode->i_mapping);
1379 
1380                         if (F2FS_HAS_BLOCKS(inode))
1381                                 f2fs_truncate(inode);
1382 
1383                         sb_end_intwrite(inode->i_sb);
1384 
1385                         spin_lock(&inode->i_lock);
1386                         atomic_dec(&inode->i_count);
1387                 }
1388                 trace_f2fs_drop_inode(inode, 0);
1389                 return 0;
1390         }
1391         ret = generic_drop_inode(inode);
1392         if (!ret)
1393                 ret = fscrypt_drop_inode(inode);
1394         trace_f2fs_drop_inode(inode, ret);
1395         return ret;
1396 }
1397 
1398 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1399 {
1400         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1401         int ret = 0;
1402 
1403         spin_lock(&sbi->inode_lock[DIRTY_META]);
1404         if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1405                 ret = 1;
1406         } else {
1407                 set_inode_flag(inode, FI_DIRTY_INODE);
1408                 stat_inc_dirty_inode(sbi, DIRTY_META);
1409         }
1410         if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1411                 list_add_tail(&F2FS_I(inode)->gdirty_list,
1412                                 &sbi->inode_list[DIRTY_META]);
1413                 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1414         }
1415         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1416         return ret;
1417 }
1418 
1419 void f2fs_inode_synced(struct inode *inode)
1420 {
1421         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1422 
1423         spin_lock(&sbi->inode_lock[DIRTY_META]);
1424         if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1425                 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1426                 return;
1427         }
1428         if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1429                 list_del_init(&F2FS_I(inode)->gdirty_list);
1430                 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1431         }
1432         clear_inode_flag(inode, FI_DIRTY_INODE);
1433         clear_inode_flag(inode, FI_AUTO_RECOVER);
1434         stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1435         spin_unlock(&sbi->inode_lock[DIRTY_META]);
1436 }
1437 
1438 /*
1439  * f2fs_dirty_inode() is called from __mark_inode_dirty()
1440  *
1441  * We should call set_dirty_inode to write the dirty inode through write_inode.
1442  */
1443 static void f2fs_dirty_inode(struct inode *inode, int flags)
1444 {
1445         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1446 
1447         if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1448                         inode->i_ino == F2FS_META_INO(sbi))
1449                 return;
1450 
1451         if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1452                 clear_inode_flag(inode, FI_AUTO_RECOVER);
1453 
1454         f2fs_inode_dirtied(inode, false);
1455 }
1456 
1457 static void f2fs_free_inode(struct inode *inode)
1458 {
1459         fscrypt_free_inode(inode);
1460         kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1461 }
1462 
1463 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1464 {
1465         percpu_counter_destroy(&sbi->alloc_valid_block_count);
1466         percpu_counter_destroy(&sbi->total_valid_inode_count);
1467 }
1468 
1469 static void destroy_device_list(struct f2fs_sb_info *sbi)
1470 {
1471         int i;
1472 
1473         for (i = 0; i < sbi->s_ndevs; i++) {
1474                 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1475 #ifdef CONFIG_BLK_DEV_ZONED
1476                 kvfree(FDEV(i).blkz_seq);
1477                 kfree(FDEV(i).zone_capacity_blocks);
1478 #endif
1479         }
1480         kvfree(sbi->devs);
1481 }
1482 
1483 static void f2fs_put_super(struct super_block *sb)
1484 {
1485         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1486         int i;
1487         bool dropped;
1488 
1489         /* unregister procfs/sysfs entries in advance to avoid race case */
1490         f2fs_unregister_sysfs(sbi);
1491 
1492         f2fs_quota_off_umount(sb);
1493 
1494         /* prevent remaining shrinker jobs */
1495         mutex_lock(&sbi->umount_mutex);
1496 
1497         /*
1498          * flush all issued checkpoints and stop checkpoint issue thread.
1499          * after then, all checkpoints should be done by each process context.
1500          */
1501         f2fs_stop_ckpt_thread(sbi);
1502 
1503         /*
1504          * We don't need to do checkpoint when superblock is clean.
1505          * But, the previous checkpoint was not done by umount, it needs to do
1506          * clean checkpoint again.
1507          */
1508         if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1509                         !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1510                 struct cp_control cpc = {
1511                         .reason = CP_UMOUNT,
1512                 };
1513                 f2fs_write_checkpoint(sbi, &cpc);
1514         }
1515 
1516         /* be sure to wait for any on-going discard commands */
1517         dropped = f2fs_issue_discard_timeout(sbi);
1518 
1519         if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1520                                         !sbi->discard_blks && !dropped) {
1521                 struct cp_control cpc = {
1522                         .reason = CP_UMOUNT | CP_TRIMMED,
1523                 };
1524                 f2fs_write_checkpoint(sbi, &cpc);
1525         }
1526 
1527         /*
1528          * normally superblock is clean, so we need to release this.
1529          * In addition, EIO will skip do checkpoint, we need this as well.
1530          */
1531         f2fs_release_ino_entry(sbi, true);
1532 
1533         f2fs_leave_shrinker(sbi);
1534         mutex_unlock(&sbi->umount_mutex);
1535 
1536         /* our cp_error case, we can wait for any writeback page */
1537         f2fs_flush_merged_writes(sbi);
1538 
1539         f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1540 
1541         f2fs_bug_on(sbi, sbi->fsync_node_num);
1542 
1543         f2fs_destroy_compress_inode(sbi);
1544 
1545         iput(sbi->node_inode);
1546         sbi->node_inode = NULL;
1547 
1548         iput(sbi->meta_inode);
1549         sbi->meta_inode = NULL;
1550 
1551         /*
1552          * iput() can update stat information, if f2fs_write_checkpoint()
1553          * above failed with error.
1554          */
1555         f2fs_destroy_stats(sbi);
1556 
1557         /* destroy f2fs internal modules */
1558         f2fs_destroy_node_manager(sbi);
1559         f2fs_destroy_segment_manager(sbi);
1560 
1561         f2fs_destroy_post_read_wq(sbi);
1562 
1563         kvfree(sbi->ckpt);
1564 
1565         sb->s_fs_info = NULL;
1566         if (sbi->s_chksum_driver)
1567                 crypto_free_shash(sbi->s_chksum_driver);
1568         kfree(sbi->raw_super);
1569 
1570         destroy_device_list(sbi);
1571         f2fs_destroy_page_array_cache(sbi);
1572         f2fs_destroy_xattr_caches(sbi);
1573         mempool_destroy(sbi->write_io_dummy);
1574 #ifdef CONFIG_QUOTA
1575         for (i = 0; i < MAXQUOTAS; i++)
1576                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1577 #endif
1578         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1579         destroy_percpu_info(sbi);
1580         f2fs_destroy_iostat(sbi);
1581         for (i = 0; i < NR_PAGE_TYPE; i++)
1582                 kvfree(sbi->write_io[i]);
1583 #ifdef CONFIG_UNICODE
1584         utf8_unload(sb->s_encoding);
1585 #endif
1586         kfree(sbi);
1587 }
1588 
1589 int f2fs_sync_fs(struct super_block *sb, int sync)
1590 {
1591         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1592         int err = 0;
1593 
1594         if (unlikely(f2fs_cp_error(sbi)))
1595                 return 0;
1596         if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1597                 return 0;
1598 
1599         trace_f2fs_sync_fs(sb, sync);
1600 
1601         if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1602                 return -EAGAIN;
1603 
1604         if (sync)
1605                 err = f2fs_issue_checkpoint(sbi);
1606 
1607         return err;
1608 }
1609 
1610 static int f2fs_freeze(struct super_block *sb)
1611 {
1612         if (f2fs_readonly(sb))
1613                 return 0;
1614 
1615         /* IO error happened before */
1616         if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1617                 return -EIO;
1618 
1619         /* must be clean, since sync_filesystem() was already called */
1620         if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1621                 return -EINVAL;
1622 
1623         /* ensure no checkpoint required */
1624         if (!llist_empty(&F2FS_SB(sb)->cprc_info.issue_list))
1625                 return -EINVAL;
1626         return 0;
1627 }
1628 
1629 static int f2fs_unfreeze(struct super_block *sb)
1630 {
1631         return 0;
1632 }
1633 
1634 #ifdef CONFIG_QUOTA
1635 static int f2fs_statfs_project(struct super_block *sb,
1636                                 kprojid_t projid, struct kstatfs *buf)
1637 {
1638         struct kqid qid;
1639         struct dquot *dquot;
1640         u64 limit;
1641         u64 curblock;
1642 
1643         qid = make_kqid_projid(projid);
1644         dquot = dqget(sb, qid);
1645         if (IS_ERR(dquot))
1646                 return PTR_ERR(dquot);
1647         spin_lock(&dquot->dq_dqb_lock);
1648 
1649         limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1650                                         dquot->dq_dqb.dqb_bhardlimit);
1651         if (limit)
1652                 limit >>= sb->s_blocksize_bits;
1653 
1654         if (limit && buf->f_blocks > limit) {
1655                 curblock = (dquot->dq_dqb.dqb_curspace +
1656                             dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1657                 buf->f_blocks = limit;
1658                 buf->f_bfree = buf->f_bavail =
1659                         (buf->f_blocks > curblock) ?
1660                          (buf->f_blocks - curblock) : 0;
1661         }
1662 
1663         limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1664                                         dquot->dq_dqb.dqb_ihardlimit);
1665 
1666         if (limit && buf->f_files > limit) {
1667                 buf->f_files = limit;
1668                 buf->f_ffree =
1669                         (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1670                          (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1671         }
1672 
1673         spin_unlock(&dquot->dq_dqb_lock);
1674         dqput(dquot);
1675         return 0;
1676 }
1677 #endif
1678 
1679 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1680 {
1681         struct super_block *sb = dentry->d_sb;
1682         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1683         u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1684         block_t total_count, user_block_count, start_count;
1685         u64 avail_node_count;
1686 
1687         total_count = le64_to_cpu(sbi->raw_super->block_count);
1688         user_block_count = sbi->user_block_count;
1689         start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1690         buf->f_type = F2FS_SUPER_MAGIC;
1691         buf->f_bsize = sbi->blocksize;
1692 
1693         buf->f_blocks = total_count - start_count;
1694         buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1695                                                 sbi->current_reserved_blocks;
1696 
1697         spin_lock(&sbi->stat_lock);
1698         if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1699                 buf->f_bfree = 0;
1700         else
1701                 buf->f_bfree -= sbi->unusable_block_count;
1702         spin_unlock(&sbi->stat_lock);
1703 
1704         if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1705                 buf->f_bavail = buf->f_bfree -
1706                                 F2FS_OPTION(sbi).root_reserved_blocks;
1707         else
1708                 buf->f_bavail = 0;
1709 
1710         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1711 
1712         if (avail_node_count > user_block_count) {
1713                 buf->f_files = user_block_count;
1714                 buf->f_ffree = buf->f_bavail;
1715         } else {
1716                 buf->f_files = avail_node_count;
1717                 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1718                                         buf->f_bavail);
1719         }
1720 
1721         buf->f_namelen = F2FS_NAME_LEN;
1722         buf->f_fsid    = u64_to_fsid(id);
1723 
1724 #ifdef CONFIG_QUOTA
1725         if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1726                         sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1727                 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1728         }
1729 #endif
1730         return 0;
1731 }
1732 
1733 static inline void f2fs_show_quota_options(struct seq_file *seq,
1734                                            struct super_block *sb)
1735 {
1736 #ifdef CONFIG_QUOTA
1737         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1738 
1739         if (F2FS_OPTION(sbi).s_jquota_fmt) {
1740                 char *fmtname = "";
1741 
1742                 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1743                 case QFMT_VFS_OLD:
1744                         fmtname = "vfsold";
1745                         break;
1746                 case QFMT_VFS_V0:
1747                         fmtname = "vfsv0";
1748                         break;
1749                 case QFMT_VFS_V1:
1750                         fmtname = "vfsv1";
1751                         break;
1752                 }
1753                 seq_printf(seq, ",jqfmt=%s", fmtname);
1754         }
1755 
1756         if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1757                 seq_show_option(seq, "usrjquota",
1758                         F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1759 
1760         if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1761                 seq_show_option(seq, "grpjquota",
1762                         F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1763 
1764         if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1765                 seq_show_option(seq, "prjjquota",
1766                         F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1767 #endif
1768 }
1769 
1770 #ifdef CONFIG_F2FS_FS_COMPRESSION
1771 static inline void f2fs_show_compress_options(struct seq_file *seq,
1772                                                         struct super_block *sb)
1773 {
1774         struct f2fs_sb_info *sbi = F2FS_SB(sb);
1775         char *algtype = "";
1776         int i;
1777 
1778         if (!f2fs_sb_has_compression(sbi))
1779                 return;
1780 
1781         switch (F2FS_OPTION(sbi).compress_algorithm) {
1782         case COMPRESS_LZO:
1783                 algtype = "lzo";
1784                 break;
1785         case COMPRESS_LZ4:
1786                 algtype = "lz4";
1787                 break;
1788         case COMPRESS_ZSTD:
1789                 algtype = "zstd";
1790                 break;
1791         case COMPRESS_LZORLE:
1792                 algtype = "lzo-rle";
1793                 break;
1794         }
1795         seq_printf(seq, ",compress_algorithm=%s", algtype);
1796 
1797         if (F2FS_OPTION(sbi).compress_level)
1798                 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1799 
1800         seq_printf(seq, ",compress_log_size=%u",
1801                         F2FS_OPTION(sbi).compress_log_size);
1802 
1803         for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1804                 seq_printf(seq, ",compress_extension=%s",
1805                         F2FS_OPTION(sbi).extensions[i]);
1806         }
1807 
1808         for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1809                 seq_printf(seq, ",nocompress_extension=%s",
1810                         F2FS_OPTION(sbi).noextensions[i]);
1811         }
1812 
1813         if (F2FS_OPTION(sbi).compress_chksum)
1814                 seq_puts(seq, ",compress_chksum");
1815 
1816         if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1817                 seq_printf(seq, ",compress_mode=%s", "fs");
1818         else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1819                 seq_printf(seq, ",compress_mode=%s", "user");
1820 
1821         if (test_opt(sbi, COMPRESS_CACHE))
1822                 seq_puts(seq, ",compress_cache");
1823 }
1824 #endif
1825 
1826 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1827 {
1828         struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1829 
1830         if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1831                 seq_printf(seq, ",background_gc=%s", "sync");
1832         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1833                 seq_printf(seq, ",background_gc=%s", "on");
1834         else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1835                 seq_printf(seq, ",background_gc=%s", "off");
1836 
1837         if (test_opt(sbi, GC_MERGE))
1838                 seq_puts(seq, ",gc_merge");
1839 
1840         if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1841                 seq_puts(seq, ",disable_roll_forward");
1842         if (test_opt(sbi, NORECOVERY))
1843                 seq_puts(seq, ",norecovery");
1844         if (test_opt(sbi, DISCARD))
1845                 seq_puts(seq, ",discard");
1846         else
1847                 seq_puts(seq, ",nodiscard");
1848         if (test_opt(sbi, NOHEAP))
1849                 seq_puts(seq, ",no_heap");
1850         else
1851                 seq_puts(seq, ",heap");
1852 #ifdef CONFIG_F2FS_FS_XATTR
1853         if (test_opt(sbi, XATTR_USER))
1854                 seq_puts(seq, ",user_xattr");
1855         else
1856                 seq_puts(seq, ",nouser_xattr");
1857         if (test_opt(sbi, INLINE_XATTR))
1858                 seq_puts(seq, ",inline_xattr");
1859         else
1860                 seq_puts(seq, ",noinline_xattr");
1861         if (test_opt(sbi, INLINE_XATTR_SIZE))
1862                 seq_printf(seq, ",inline_xattr_size=%u",
1863                                         F2FS_OPTION(sbi).inline_xattr_size);
1864 #endif
1865 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1866         if (test_opt(sbi, POSIX_ACL))
1867                 seq_puts(seq, ",acl");
1868         else
1869                 seq_puts(seq, ",noacl");
1870 #endif
1871         if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1872                 seq_puts(seq, ",disable_ext_identify");
1873         if (test_opt(sbi, INLINE_DATA))
1874                 seq_puts(seq, ",inline_data");
1875         else
1876                 seq_puts(seq, ",noinline_data");
1877         if (test_opt(sbi, INLINE_DENTRY))
1878                 seq_puts(seq, ",inline_dentry");
1879         else
1880                 seq_puts(seq, ",noinline_dentry");
1881         if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1882                 seq_puts(seq, ",flush_merge");
1883         if (test_opt(sbi, NOBARRIER))
1884                 seq_puts(seq, ",nobarrier");
1885         if (test_opt(sbi, FASTBOOT))
1886                 seq_puts(seq, ",fastboot");
1887         if (test_opt(sbi, EXTENT_CACHE))
1888                 seq_puts(seq, ",extent_cache");
1889         else
1890                 seq_puts(seq, ",noextent_cache");
1891         if (test_opt(sbi, DATA_FLUSH))
1892                 seq_puts(seq, ",data_flush");
1893 
1894         seq_puts(seq, ",mode=");
1895         if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1896                 seq_puts(seq, "adaptive");
1897         else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1898                 seq_puts(seq, "lfs");
1899         seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1900         if (test_opt(sbi, RESERVE_ROOT))
1901                 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1902                                 F2FS_OPTION(sbi).root_reserved_blocks,
1903                                 from_kuid_munged(&init_user_ns,
1904                                         F2FS_OPTION(sbi).s_resuid),
1905                                 from_kgid_munged(&init_user_ns,
1906                                         F2FS_OPTION(sbi).s_resgid));
1907         if (F2FS_IO_SIZE_BITS(sbi))
1908                 seq_printf(seq, ",io_bits=%u",
1909                                 F2FS_OPTION(sbi).write_io_size_bits);
1910 #ifdef CONFIG_F2FS_FAULT_INJECTION
1911         if (test_opt(sbi, FAULT_INJECTION)) {
1912                 seq_printf(seq, ",fault_injection=%u",
1913                                 F2FS_OPTION(sbi).fault_info.inject_rate);
1914                 seq_printf(seq, ",fault_type=%u",
1915                                 F2FS_OPTION(sbi).fault_info.inject_type);
1916         }
1917 #endif
1918 #ifdef CONFIG_QUOTA
1919         if (test_opt(sbi, QUOTA))
1920                 seq_puts(seq, ",quota");
1921         if (test_opt(sbi, USRQUOTA))
1922                 seq_puts(seq, ",usrquota");
1923         if (test_opt(sbi, GRPQUOTA))
1924                 seq_puts(seq, ",grpquota");
1925         if (test_opt(sbi, PRJQUOTA))
1926                 seq_puts(seq, ",prjquota");
1927 #endif
1928         f2fs_show_quota_options(seq, sbi->sb);
1929         if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1930                 seq_printf(seq, ",whint_mode=%s", "user-based");
1931         else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1932                 seq_printf(seq, ",whint_mode=%s", "fs-based");
1933 
1934         fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
1935 
1936         if (sbi->sb->s_flags & SB_INLINECRYPT)
1937                 seq_puts(seq, ",inlinecrypt");
1938 
1939         if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1940                 seq_printf(seq, ",alloc_mode=%s", "default");
1941         else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1942                 seq_printf(seq, ",alloc_mode=%s", "reuse");
1943 
1944         if (test_opt(sbi, DISABLE_CHECKPOINT))
1945                 seq_printf(seq, ",checkpoint=disable:%u",
1946                                 F2FS_OPTION(sbi).unusable_cap);
1947         if (test_opt(sbi, MERGE_CHECKPOINT))
1948                 seq_puts(seq, ",checkpoint_merge");
1949         else
1950                 seq_puts(seq, ",nocheckpoint_merge");
1951         if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1952                 seq_printf(seq, ",fsync_mode=%s", "posix");
1953         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1954                 seq_printf(seq, ",fsync_mode=%s", "strict");
1955         else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1956                 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1957 
1958 #ifdef CONFIG_F2FS_FS_COMPRESSION
1959         f2fs_show_compress_options(seq, sbi->sb);
1960 #endif
1961 
1962         if (test_opt(sbi, ATGC))
1963                 seq_puts(seq, ",atgc");
1964 
1965         if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
1966                 seq_printf(seq, ",discard_unit=%s", "block");
1967         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
1968                 seq_printf(seq, ",discard_unit=%s", "segment");
1969         else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
1970                 seq_printf(seq, ",discard_unit=%s", "section");
1971 
1972         return 0;
1973 }
1974 
1975 static void default_options(struct f2fs_sb_info *sbi)
1976 {
1977         /* init some FS parameters */
1978         if (f2fs_sb_has_readonly(sbi))
1979                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
1980         else
1981                 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
1982 
1983         F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1984         F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1985         F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1986         F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1987         F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1988         F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1989         F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
1990         F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1991         F2FS_OPTION(sbi).compress_ext_cnt = 0;
1992         F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1993         F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
1994 
1995         sbi->sb->s_flags &= ~SB_INLINECRYPT;
1996 
1997         set_opt(sbi, INLINE_XATTR);
1998         set_opt(sbi, INLINE_DATA);
1999         set_opt(sbi, INLINE_DENTRY);
2000         set_opt(sbi, EXTENT_CACHE);
2001         set_opt(sbi, NOHEAP);
2002         clear_opt(sbi, DISABLE_CHECKPOINT);
2003         set_opt(sbi, MERGE_CHECKPOINT);
2004         F2FS_OPTION(sbi).unusable_cap = 0;
2005         sbi->sb->s_flags |= SB_LAZYTIME;
2006         set_opt(sbi, FLUSH_MERGE);
2007         if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2008                 set_opt(sbi, DISCARD);
2009         if (f2fs_sb_has_blkzoned(sbi)) {
2010                 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2011                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2012         } else {
2013                 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2014                 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2015         }
2016 
2017 #ifdef CONFIG_F2FS_FS_XATTR
2018         set_opt(sbi, XATTR_USER);
2019 #endif
2020 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2021         set_opt(sbi, POSIX_ACL);
2022 #endif
2023 
2024         f2fs_build_fault_attr(sbi, 0, 0);
2025 }
2026 
2027 #ifdef CONFIG_QUOTA
2028 static int f2fs_enable_quotas(struct super_block *sb);
2029 #endif
2030 
2031 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2032 {
2033         unsigned int s_flags = sbi->sb->s_flags;
2034         struct cp_control cpc;
2035         int err = 0;
2036         int ret;
2037         block_t unusable;
2038 
2039         if (s_flags & SB_RDONLY) {
2040                 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2041                 return -EINVAL;
2042         }
2043         sbi->sb->s_flags |= SB_ACTIVE;
2044 
2045         f2fs_update_time(sbi, DISABLE_TIME);
2046 
2047         while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2048                 down_write(&sbi->gc_lock);
2049                 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2050                 if (err == -ENODATA) {
2051                         err = 0;
2052                         break;
2053                 }
2054                 if (err && err != -EAGAIN)
2055                         break;
2056         }
2057 
2058         ret = sync_filesystem(sbi->sb);
2059         if (ret || err) {
2060                 err = ret ? ret : err;
2061                 goto restore_flag;
2062         }
2063 
2064         unusable = f2fs_get_unusable_blocks(sbi);
2065         if (f2fs_disable_cp_again(sbi, unusable)) {
2066                 err = -EAGAIN;
2067                 goto restore_flag;
2068         }
2069 
2070         down_write(&sbi->gc_lock);
2071         cpc.reason = CP_PAUSE;
2072         set_sbi_flag(sbi, SBI_CP_DISABLED);
2073         err = f2fs_write_checkpoint(sbi, &cpc);
2074         if (err)
2075                 goto out_unlock;
2076 
2077         spin_lock(&sbi->stat_lock);
2078         sbi->unusable_block_count = unusable;
2079         spin_unlock(&sbi->stat_lock);
2080 
2081 out_unlock:
2082         up_write(&sbi->gc_lock);
2083 restore_flag:
2084         sbi->sb->s_flags = s_flags;     /* Restore SB_RDONLY status */
2085         return err;
2086 }
2087 
2088 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2089 {
2090         int retry = DEFAULT_RETRY_IO_COUNT;
2091 
2092         /* we should flush all the data to keep data consistency */
2093         do {
2094                 sync_inodes_sb(sbi->sb);
2095                 cond_resched();
2096                 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2097         } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2098 
2099         if (unlikely(retry < 0))
2100                 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2101 
2102         down_write(&sbi->gc_lock);
2103         f2fs_dirty_to_prefree(sbi);
2104 
2105         clear_sbi_flag(sbi, SBI_CP_DISABLED);
2106         set_sbi_flag(sbi, SBI_IS_DIRTY);
2107         up_write(&sbi->gc_lock);
2108 
2109         f2fs_sync_fs(sbi->sb, 1);
2110 }
2111 
2112 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2113 {
2114         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2115         struct f2fs_mount_info org_mount_opt;
2116         unsigned long old_sb_flags;
2117         int err;
2118         bool need_restart_gc = false, need_stop_gc = false;
2119         bool need_restart_ckpt = false, need_stop_ckpt = false;
2120         bool need_restart_flush = false, need_stop_flush = false;
2121         bool need_restart_discard = false, need_stop_discard = false;
2122         bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2123         bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2124         bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2125         bool no_atgc = !test_opt(sbi, ATGC);
2126         bool no_discard = !test_opt(sbi, DISCARD);
2127         bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2128         bool block_unit_discard = f2fs_block_unit_discard(sbi);
2129         struct discard_cmd_control *dcc;
2130 #ifdef CONFIG_QUOTA
2131         int i, j;
2132 #endif
2133 
2134         /*
2135          * Save the old mount options in case we
2136          * need to restore them.
2137          */
2138         org_mount_opt = sbi->mount_opt;
2139         old_sb_flags = sb->s_flags;
2140 
2141 #ifdef CONFIG_QUOTA
2142         org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2143         for (i = 0; i < MAXQUOTAS; i++) {
2144                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2145                         org_mount_opt.s_qf_names[i] =
2146                                 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2147                                 GFP_KERNEL);
2148                         if (!org_mount_opt.s_qf_names[i]) {
2149                                 for (j = 0; j < i; j++)
2150                                         kfree(org_mount_opt.s_qf_names[j]);
2151                                 return -ENOMEM;
2152                         }
2153                 } else {
2154                         org_mount_opt.s_qf_names[i] = NULL;
2155                 }
2156         }
2157 #endif
2158 
2159         /* recover superblocks we couldn't write due to previous RO mount */
2160         if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2161                 err = f2fs_commit_super(sbi, false);
2162                 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2163                           err);
2164                 if (!err)
2165                         clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2166         }
2167 
2168         default_options(sbi);
2169 
2170         /* parse mount options */
2171         err = parse_options(sb, data, true);
2172         if (err)
2173                 goto restore_opts;
2174 
2175         /*
2176          * Previous and new state of filesystem is RO,
2177          * so skip checking GC and FLUSH_MERGE conditions.
2178          */
2179         if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2180                 goto skip;
2181 
2182         if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2183                 err = -EROFS;
2184                 goto restore_opts;
2185         }
2186 
2187 #ifdef CONFIG_QUOTA
2188         if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2189                 err = dquot_suspend(sb, -1);
2190                 if (err < 0)
2191                         goto restore_opts;
2192         } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2193                 /* dquot_resume needs RW */
2194                 sb->s_flags &= ~SB_RDONLY;
2195                 if (sb_any_quota_suspended(sb)) {
2196                         dquot_resume(sb, -1);
2197                 } else if (f2fs_sb_has_quota_ino(sbi)) {
2198                         err = f2fs_enable_quotas(sb);
2199                         if (err)
2200                                 goto restore_opts;
2201                 }
2202         }
2203 #endif
2204         /* disallow enable atgc dynamically */
2205         if (no_atgc == !!test_opt(sbi, ATGC)) {
2206                 err = -EINVAL;
2207                 f2fs_warn(sbi, "switch atgc option is not allowed");
2208                 goto restore_opts;
2209         }
2210 
2211         /* disallow enable/disable extent_cache dynamically */
2212         if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2213                 err = -EINVAL;
2214                 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2215                 goto restore_opts;
2216         }
2217 
2218         if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2219                 err = -EINVAL;
2220                 f2fs_warn(sbi, "switch io_bits option is not allowed");
2221                 goto restore_opts;
2222         }
2223 
2224         if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2225                 err = -EINVAL;
2226                 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2227                 goto restore_opts;
2228         }
2229 
2230         if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2231                 err = -EINVAL;
2232                 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2233                 goto restore_opts;
2234         }
2235 
2236         if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2237                 err = -EINVAL;
2238                 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2239                 goto restore_opts;
2240         }
2241 
2242         /*
2243          * We stop the GC thread if FS is mounted as RO
2244          * or if background_gc = off is passed in mount
2245          * option. Also sync the filesystem.
2246          */
2247         if ((*flags & SB_RDONLY) ||
2248                         (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2249                         !test_opt(sbi, GC_MERGE))) {
2250                 if (sbi->gc_thread) {
2251                         f2fs_stop_gc_thread(sbi);
2252                         need_restart_gc = true;
2253                 }
2254         } else if (!sbi->gc_thread) {
2255                 err = f2fs_start_gc_thread(sbi);
2256                 if (err)
2257                         goto restore_opts;
2258                 need_stop_gc = true;
2259         }
2260 
2261         if (*flags & SB_RDONLY ||
2262                 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2263                 sync_inodes_sb(sb);
2264 
2265                 set_sbi_flag(sbi, SBI_IS_DIRTY);
2266                 set_sbi_flag(sbi, SBI_IS_CLOSE);
2267                 f2fs_sync_fs(sb, 1);
2268                 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2269         }
2270 
2271         if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2272                         !test_opt(sbi, MERGE_CHECKPOINT)) {
2273                 f2fs_stop_ckpt_thread(sbi);
2274                 need_restart_ckpt = true;
2275         } else {
2276                 err = f2fs_start_ckpt_thread(sbi);
2277                 if (err) {
2278                         f2fs_err(sbi,
2279                             "Failed to start F2FS issue_checkpoint_thread (%d)",
2280                             err);
2281                         goto restore_gc;
2282                 }
2283                 need_stop_ckpt = true;
2284         }
2285 
2286         /*
2287          * We stop issue flush thread if FS is mounted as RO
2288          * or if flush_merge is not passed in mount option.
2289          */
2290         if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2291                 clear_opt(sbi, FLUSH_MERGE);
2292                 f2fs_destroy_flush_cmd_control(sbi, false);
2293                 need_restart_flush = true;
2294         } else {
2295                 err = f2fs_create_flush_cmd_control(sbi);
2296                 if (err)
2297                         goto restore_ckpt;
2298                 need_stop_flush = true;
2299         }
2300 
2301         if (no_discard == !!test_opt(sbi, DISCARD)) {
2302                 if (test_opt(sbi, DISCARD)) {
2303                         err = f2fs_start_discard_thread(sbi);
2304                         if (err)
2305                                 goto restore_flush;
2306                         need_stop_discard = true;
2307                 } else {
2308                         dcc = SM_I(sbi)->dcc_info;
2309                         f2fs_stop_discard_thread(sbi);
2310                         if (atomic_read(&dcc->discard_cmd_cnt))
2311                                 f2fs_issue_discard_timeout(sbi);
2312                         need_restart_discard = true;
2313                 }
2314         }
2315 
2316         if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2317                 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2318                         err = f2fs_disable_checkpoint(sbi);
2319                         if (err)
2320                                 goto restore_discard;
2321                 } else {
2322                         f2fs_enable_checkpoint(sbi);
2323                 }
2324         }
2325 
2326 skip:
2327 #ifdef CONFIG_QUOTA
2328         /* Release old quota file names */
2329         for (i = 0; i < MAXQUOTAS; i++)
2330                 kfree(org_mount_opt.s_qf_names[i]);
2331 #endif
2332         /* Update the POSIXACL Flag */
2333         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2334                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2335 
2336         limit_reserve_root(sbi);
2337         adjust_unusable_cap_perc(sbi);
2338         *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2339         return 0;
2340 restore_discard:
2341         if (need_restart_discard) {
2342                 if (f2fs_start_discard_thread(sbi))
2343                         f2fs_warn(sbi, "discard has been stopped");
2344         } else if (need_stop_discard) {
2345                 f2fs_stop_discard_thread(sbi);
2346         }
2347 restore_flush:
2348         if (need_restart_flush) {
2349                 if (f2fs_create_flush_cmd_control(sbi))
2350                         f2fs_warn(sbi, "background flush thread has stopped");
2351         } else if (need_stop_flush) {
2352                 clear_opt(sbi, FLUSH_MERGE);
2353                 f2fs_destroy_flush_cmd_control(sbi, false);
2354         }
2355 restore_ckpt:
2356         if (need_restart_ckpt) {
2357                 if (f2fs_start_ckpt_thread(sbi))
2358                         f2fs_warn(sbi, "background ckpt thread has stopped");
2359         } else if (need_stop_ckpt) {
2360                 f2fs_stop_ckpt_thread(sbi);
2361         }
2362 restore_gc:
2363         if (need_restart_gc) {
2364                 if (f2fs_start_gc_thread(sbi))
2365                         f2fs_warn(sbi, "background gc thread has stopped");
2366         } else if (need_stop_gc) {
2367                 f2fs_stop_gc_thread(sbi);
2368         }
2369 restore_opts:
2370 #ifdef CONFIG_QUOTA
2371         F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2372         for (i = 0; i < MAXQUOTAS; i++) {
2373                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2374                 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2375         }
2376 #endif
2377         sbi->mount_opt = org_mount_opt;
2378         sb->s_flags = old_sb_flags;
2379         return err;
2380 }
2381 
2382 #ifdef CONFIG_QUOTA
2383 /* Read data from quotafile */
2384 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2385                                size_t len, loff_t off)
2386 {
2387         struct inode *inode = sb_dqopt(sb)->files[type];
2388         struct address_space *mapping = inode->i_mapping;
2389         block_t blkidx = F2FS_BYTES_TO_BLK(off);
2390         int offset = off & (sb->s_blocksize - 1);
2391         int tocopy;
2392         size_t toread;
2393         loff_t i_size = i_size_read(inode);
2394         struct page *page;
2395         char *kaddr;
2396 
2397         if (off > i_size)
2398                 return 0;
2399 
2400         if (off + len > i_size)
2401                 len = i_size - off;
2402         toread = len;
2403         while (toread > 0) {
2404                 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2405 repeat:
2406                 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2407                 if (IS_ERR(page)) {
2408                         if (PTR_ERR(page) == -ENOMEM) {
2409                                 congestion_wait(BLK_RW_ASYNC,
2410                                                 DEFAULT_IO_TIMEOUT);
2411                                 goto repeat;
2412                         }
2413                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2414                         return PTR_ERR(page);
2415                 }
2416 
2417                 lock_page(page);
2418 
2419                 if (unlikely(page->mapping != mapping)) {
2420                         f2fs_put_page(page, 1);
2421                         goto repeat;
2422                 }
2423                 if (unlikely(!PageUptodate(page))) {
2424                         f2fs_put_page(page, 1);
2425                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2426                         return -EIO;
2427                 }
2428 
2429                 kaddr = kmap_atomic(page);
2430                 memcpy(data, kaddr + offset, tocopy);
2431                 kunmap_atomic(kaddr);
2432                 f2fs_put_page(page, 1);
2433 
2434                 offset = 0;
2435                 toread -= tocopy;
2436                 data += tocopy;
2437                 blkidx++;
2438         }
2439         return len;
2440 }
2441 
2442 /* Write to quotafile */
2443 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2444                                 const char *data, size_t len, loff_t off)
2445 {
2446         struct inode *inode = sb_dqopt(sb)->files[type];
2447         struct address_space *mapping = inode->i_mapping;
2448         const struct address_space_operations *a_ops = mapping->a_ops;
2449         int offset = off & (sb->s_blocksize - 1);
2450         size_t towrite = len;
2451         struct page *page;
2452         void *fsdata = NULL;
2453         char *kaddr;
2454         int err = 0;
2455         int tocopy;
2456 
2457         while (towrite > 0) {
2458                 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2459                                                                 towrite);
2460 retry:
2461                 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2462                                                         &page, &fsdata);
2463                 if (unlikely(err)) {
2464                         if (err == -ENOMEM) {
2465                                 congestion_wait(BLK_RW_ASYNC,
2466                                                 DEFAULT_IO_TIMEOUT);
2467                                 goto retry;
2468                         }
2469                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2470                         break;
2471                 }
2472 
2473                 kaddr = kmap_atomic(page);
2474                 memcpy(kaddr + offset, data, tocopy);
2475                 kunmap_atomic(kaddr);
2476                 flush_dcache_page(page);
2477 
2478                 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2479                                                 page, fsdata);
2480                 offset = 0;
2481                 towrite -= tocopy;
2482                 off += tocopy;
2483                 data += tocopy;
2484                 cond_resched();
2485         }
2486 
2487         if (len == towrite)
2488                 return err;
2489         inode->i_mtime = inode->i_ctime = current_time(inode);
2490         f2fs_mark_inode_dirty_sync(inode, false);
2491         return len - towrite;
2492 }
2493 
2494 static struct dquot **f2fs_get_dquots(struct inode *inode)
2495 {
2496         return F2FS_I(inode)->i_dquot;
2497 }
2498 
2499 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2500 {
2501         return &F2FS_I(inode)->i_reserved_quota;
2502 }
2503 
2504 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2505 {
2506         if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2507                 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2508                 return 0;
2509         }
2510 
2511         return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2512                                         F2FS_OPTION(sbi).s_jquota_fmt, type);
2513 }
2514 
2515 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2516 {
2517         int enabled = 0;
2518         int i, err;
2519 
2520         if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2521                 err = f2fs_enable_quotas(sbi->sb);
2522                 if (err) {
2523                         f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2524                         return 0;
2525                 }
2526                 return 1;
2527         }
2528 
2529         for (i = 0; i < MAXQUOTAS; i++) {
2530                 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2531                         err = f2fs_quota_on_mount(sbi, i);
2532                         if (!err) {
2533                                 enabled = 1;
2534                                 continue;
2535                         }
2536                         f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2537                                  err, i);
2538                 }
2539         }
2540         return enabled;
2541 }
2542 
2543 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2544                              unsigned int flags)
2545 {
2546         struct inode *qf_inode;
2547         unsigned long qf_inum;
2548         int err;
2549 
2550         BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2551 
2552         qf_inum = f2fs_qf_ino(sb, type);
2553         if (!qf_inum)
2554                 return -EPERM;
2555 
2556         qf_inode = f2fs_iget(sb, qf_inum);
2557         if (IS_ERR(qf_inode)) {
2558                 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2559                 return PTR_ERR(qf_inode);
2560         }
2561 
2562         /* Don't account quota for quota files to avoid recursion */
2563         qf_inode->i_flags |= S_NOQUOTA;
2564         err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2565         iput(qf_inode);
2566         return err;
2567 }
2568 
2569 static int f2fs_enable_quotas(struct super_block *sb)
2570 {
2571         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2572         int type, err = 0;
2573         unsigned long qf_inum;
2574         bool quota_mopt[MAXQUOTAS] = {
2575                 test_opt(sbi, USRQUOTA),
2576                 test_opt(sbi, GRPQUOTA),
2577                 test_opt(sbi, PRJQUOTA),
2578         };
2579 
2580         if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2581                 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2582                 return 0;
2583         }
2584 
2585         sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2586 
2587         for (type = 0; type < MAXQUOTAS; type++) {
2588                 qf_inum = f2fs_qf_ino(sb, type);
2589                 if (qf_inum) {
2590                         err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2591                                 DQUOT_USAGE_ENABLED |
2592                                 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2593                         if (err) {
2594                                 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2595                                          type, err);
2596                                 for (type--; type >= 0; type--)
2597                                         dquot_quota_off(sb, type);
2598                                 set_sbi_flag(F2FS_SB(sb),
2599                                                 SBI_QUOTA_NEED_REPAIR);
2600                                 return err;
2601                         }
2602                 }
2603         }
2604         return 0;
2605 }
2606 
2607 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2608 {
2609         struct quota_info *dqopt = sb_dqopt(sbi->sb);
2610         struct address_space *mapping = dqopt->files[type]->i_mapping;
2611         int ret = 0;
2612 
2613         ret = dquot_writeback_dquots(sbi->sb, type);
2614         if (ret)
2615                 goto out;
2616 
2617         ret = filemap_fdatawrite(mapping);
2618         if (ret)
2619                 goto out;
2620 
2621         /* if we are using journalled quota */
2622         if (is_journalled_quota(sbi))
2623                 goto out;
2624 
2625         ret = filemap_fdatawait(mapping);
2626 
2627         truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2628 out:
2629         if (ret)
2630                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2631         return ret;
2632 }
2633 
2634 int f2fs_quota_sync(struct super_block *sb, int type)
2635 {
2636         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2637         struct quota_info *dqopt = sb_dqopt(sb);
2638         int cnt;
2639         int ret;
2640 
2641         /*
2642          * Now when everything is written we can discard the pagecache so
2643          * that userspace sees the changes.
2644          */
2645         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2646 
2647                 if (type != -1 && cnt != type)
2648                         continue;
2649 
2650                 if (!sb_has_quota_active(sb, type))
2651                         return 0;
2652 
2653                 inode_lock(dqopt->files[cnt]);
2654 
2655                 /*
2656                  * do_quotactl
2657                  *  f2fs_quota_sync
2658                  *  down_read(quota_sem)
2659                  *  dquot_writeback_dquots()
2660                  *  f2fs_dquot_commit
2661                  *                            block_operation
2662                  *                            down_read(quota_sem)
2663                  */
2664                 f2fs_lock_op(sbi);
2665                 down_read(&sbi->quota_sem);
2666 
2667                 ret = f2fs_quota_sync_file(sbi, cnt);
2668 
2669                 up_read(&sbi->quota_sem);
2670                 f2fs_unlock_op(sbi);
2671 
2672                 inode_unlock(dqopt->files[cnt]);
2673 
2674                 if (ret)
2675                         break;
2676         }
2677         return ret;
2678 }
2679 
2680 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2681                                                         const struct path *path)
2682 {
2683         struct inode *inode;
2684         int err;
2685 
2686         /* if quota sysfile exists, deny enabling quota with specific file */
2687         if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2688                 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2689                 return -EBUSY;
2690         }
2691 
2692         err = f2fs_quota_sync(sb, type);
2693         if (err)
2694                 return err;
2695 
2696         err = dquot_quota_on(sb, type, format_id, path);
2697         if (err)
2698                 return err;
2699 
2700         inode = d_inode(path->dentry);
2701 
2702         inode_lock(inode);
2703         F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2704         f2fs_set_inode_flags(inode);
2705         inode_unlock(inode);
2706         f2fs_mark_inode_dirty_sync(inode, false);
2707 
2708         return 0;
2709 }
2710 
2711 static int __f2fs_quota_off(struct super_block *sb, int type)
2712 {
2713         struct inode *inode = sb_dqopt(sb)->files[type];
2714         int err;
2715 
2716         if (!inode || !igrab(inode))
2717                 return dquot_quota_off(sb, type);
2718 
2719         err = f2fs_quota_sync(sb, type);
2720         if (err)
2721                 goto out_put;
2722 
2723         err = dquot_quota_off(sb, type);
2724         if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2725                 goto out_put;
2726 
2727         inode_lock(inode);
2728         F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2729         f2fs_set_inode_flags(inode);
2730         inode_unlock(inode);
2731         f2fs_mark_inode_dirty_sync(inode, false);
2732 out_put:
2733         iput(inode);
2734         return err;
2735 }
2736 
2737 static int f2fs_quota_off(struct super_block *sb, int type)
2738 {
2739         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2740         int err;
2741 
2742         err = __f2fs_quota_off(sb, type);
2743 
2744         /*
2745          * quotactl can shutdown journalled quota, result in inconsistence
2746          * between quota record and fs data by following updates, tag the
2747          * flag to let fsck be aware of it.
2748          */
2749         if (is_journalled_quota(sbi))
2750                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2751         return err;
2752 }
2753 
2754 void f2fs_quota_off_umount(struct super_block *sb)
2755 {
2756         int type;
2757         int err;
2758 
2759         for (type = 0; type < MAXQUOTAS; type++) {
2760                 err = __f2fs_quota_off(sb, type);
2761                 if (err) {
2762                         int ret = dquot_quota_off(sb, type);
2763 
2764                         f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2765                                  type, err, ret);
2766                         set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2767                 }
2768         }
2769         /*
2770          * In case of checkpoint=disable, we must flush quota blocks.
2771          * This can cause NULL exception for node_inode in end_io, since
2772          * put_super already dropped it.
2773          */
2774         sync_filesystem(sb);
2775 }
2776 
2777 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2778 {
2779         struct quota_info *dqopt = sb_dqopt(sb);
2780         int type;
2781 
2782         for (type = 0; type < MAXQUOTAS; type++) {
2783                 if (!dqopt->files[type])
2784                         continue;
2785                 f2fs_inode_synced(dqopt->files[type]);
2786         }
2787 }
2788 
2789 static int f2fs_dquot_commit(struct dquot *dquot)
2790 {
2791         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2792         int ret;
2793 
2794         down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2795         ret = dquot_commit(dquot);
2796         if (ret < 0)
2797                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2798         up_read(&sbi->quota_sem);
2799         return ret;
2800 }
2801 
2802 static int f2fs_dquot_acquire(struct dquot *dquot)
2803 {
2804         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2805         int ret;
2806 
2807         down_read(&sbi->quota_sem);
2808         ret = dquot_acquire(dquot);
2809         if (ret < 0)
2810                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2811         up_read(&sbi->quota_sem);
2812         return ret;
2813 }
2814 
2815 static int f2fs_dquot_release(struct dquot *dquot)
2816 {
2817         struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2818         int ret = dquot_release(dquot);
2819 
2820         if (ret < 0)
2821                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2822         return ret;
2823 }
2824 
2825 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2826 {
2827         struct super_block *sb = dquot->dq_sb;
2828         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2829         int ret = dquot_mark_dquot_dirty(dquot);
2830 
2831         /* if we are using journalled quota */
2832         if (is_journalled_quota(sbi))
2833                 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2834 
2835         return ret;
2836 }
2837 
2838 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2839 {
2840         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2841         int ret = dquot_commit_info(sb, type);
2842 
2843         if (ret < 0)
2844                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2845         return ret;
2846 }
2847 
2848 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2849 {
2850         *projid = F2FS_I(inode)->i_projid;
2851         return 0;
2852 }
2853 
2854 static const struct dquot_operations f2fs_quota_operations = {
2855         .get_reserved_space = f2fs_get_reserved_space,
2856         .write_dquot    = f2fs_dquot_commit,
2857         .acquire_dquot  = f2fs_dquot_acquire,
2858         .release_dquot  = f2fs_dquot_release,
2859         .mark_dirty     = f2fs_dquot_mark_dquot_dirty,
2860         .write_info     = f2fs_dquot_commit_info,
2861         .alloc_dquot    = dquot_alloc,
2862         .destroy_dquot  = dquot_destroy,
2863         .get_projid     = f2fs_get_projid,
2864         .get_next_id    = dquot_get_next_id,
2865 };
2866 
2867 static const struct quotactl_ops f2fs_quotactl_ops = {
2868         .quota_on       = f2fs_quota_on,
2869         .quota_off      = f2fs_quota_off,
2870         .quota_sync     = f2fs_quota_sync,
2871         .get_state      = dquot_get_state,
2872         .set_info       = dquot_set_dqinfo,
2873         .get_dqblk      = dquot_get_dqblk,
2874         .set_dqblk      = dquot_set_dqblk,
2875         .get_nextdqblk  = dquot_get_next_dqblk,
2876 };
2877 #else
2878 int f2fs_quota_sync(struct super_block *sb, int type)
2879 {
2880         return 0;
2881 }
2882 
2883 void f2fs_quota_off_umount(struct super_block *sb)
2884 {
2885 }
2886 #endif
2887 
2888 static const struct super_operations f2fs_sops = {
2889         .alloc_inode    = f2fs_alloc_inode,
2890         .free_inode     = f2fs_free_inode,
2891         .drop_inode     = f2fs_drop_inode,
2892         .write_inode    = f2fs_write_inode,
2893         .dirty_inode    = f2fs_dirty_inode,
2894         .show_options   = f2fs_show_options,
2895 #ifdef CONFIG_QUOTA
2896         .quota_read     = f2fs_quota_read,
2897         .quota_write    = f2fs_quota_write,
2898         .get_dquots     = f2fs_get_dquots,
2899 #endif
2900         .evict_inode    = f2fs_evict_inode,
2901         .put_super      = f2fs_put_super,
2902         .sync_fs        = f2fs_sync_fs,
2903         .freeze_fs      = f2fs_freeze,
2904         .unfreeze_fs    = f2fs_unfreeze,
2905         .statfs         = f2fs_statfs,
2906         .remount_fs     = f2fs_remount,
2907 };
2908 
2909 #ifdef CONFIG_FS_ENCRYPTION
2910 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2911 {
2912         return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2913                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2914                                 ctx, len, NULL);
2915 }
2916 
2917 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2918                                                         void *fs_data)
2919 {
2920         struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2921 
2922         /*
2923          * Encrypting the root directory is not allowed because fsck
2924          * expects lost+found directory to exist and remain unencrypted
2925          * if LOST_FOUND feature is enabled.
2926          *
2927          */
2928         if (f2fs_sb_has_lost_found(sbi) &&
2929                         inode->i_ino == F2FS_ROOT_INO(sbi))
2930                 return -EPERM;
2931 
2932         return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2933                                 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2934                                 ctx, len, fs_data, XATTR_CREATE);
2935 }
2936 
2937 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
2938 {
2939         return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
2940 }
2941 
2942 static bool f2fs_has_stable_inodes(struct super_block *sb)
2943 {
2944         return true;
2945 }
2946 
2947 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2948                                        int *ino_bits_ret, int *lblk_bits_ret)
2949 {
2950         *ino_bits_ret = 8 * sizeof(nid_t);
2951         *lblk_bits_ret = 8 * sizeof(block_t);
2952 }
2953 
2954 static int f2fs_get_num_devices(struct super_block *sb)
2955 {
2956         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2957 
2958         if (f2fs_is_multi_device(sbi))
2959                 return sbi->s_ndevs;
2960         return 1;
2961 }
2962 
2963 static void f2fs_get_devices(struct super_block *sb,
2964                              struct request_queue **devs)
2965 {
2966         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2967         int i;
2968 
2969         for (i = 0; i < sbi->s_ndevs; i++)
2970                 devs[i] = bdev_get_queue(FDEV(i).bdev);
2971 }
2972 
2973 static const struct fscrypt_operations f2fs_cryptops = {
2974         .key_prefix             = "f2fs:",
2975         .get_context            = f2fs_get_context,
2976         .set_context            = f2fs_set_context,
2977         .get_dummy_policy       = f2fs_get_dummy_policy,
2978         .empty_dir              = f2fs_empty_dir,
2979         .max_namelen            = F2FS_NAME_LEN,
2980         .has_stable_inodes      = f2fs_has_stable_inodes,
2981         .get_ino_and_lblk_bits  = f2fs_get_ino_and_lblk_bits,
2982         .get_num_devices        = f2fs_get_num_devices,
2983         .get_devices            = f2fs_get_devices,
2984 };
2985 #endif
2986 
2987 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2988                 u64 ino, u32 generation)
2989 {
2990         struct f2fs_sb_info *sbi = F2FS_SB(sb);
2991         struct inode *inode;
2992 
2993         if (f2fs_check_nid_range(sbi, ino))
2994                 return ERR_PTR(-ESTALE);
2995 
2996         /*
2997          * f2fs_iget isn't quite right if the inode is currently unallocated!
2998          * However f2fs_iget currently does appropriate checks to handle stale
2999          * inodes so everything is OK.
3000          */
3001         inode = f2fs_iget(sb, ino);
3002         if (IS_ERR(inode))
3003                 return ERR_CAST(inode);
3004         if (unlikely(generation && inode->i_generation != generation)) {
3005                 /* we didn't find the right inode.. */
3006                 iput(inode);
3007                 return ERR_PTR(-ESTALE);
3008         }
3009         return inode;
3010 }
3011 
3012 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3013                 int fh_len, int fh_type)
3014 {
3015         return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3016                                     f2fs_nfs_get_inode);
3017 }
3018 
3019 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3020                 int fh_len, int fh_type)
3021 {
3022         return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3023                                     f2fs_nfs_get_inode);
3024 }
3025 
3026 static const struct export_operations f2fs_export_ops = {
3027         .fh_to_dentry = f2fs_fh_to_dentry,
3028         .fh_to_parent = f2fs_fh_to_parent,
3029         .get_parent = f2fs_get_parent,
3030 };
3031 
3032 loff_t max_file_blocks(struct inode *inode)
3033 {
3034         loff_t result = 0;
3035         loff_t leaf_count;
3036 
3037         /*
3038          * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3039          * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3040          * space in inode.i_addr, it will be more safe to reassign
3041          * result as zero.
3042          */
3043 
3044         if (inode && f2fs_compressed_file(inode))
3045                 leaf_count = ADDRS_PER_BLOCK(inode);
3046         else
3047                 leaf_count = DEF_ADDRS_PER_BLOCK;
3048 
3049         /* two direct node blocks */
3050         result += (leaf_count * 2);
3051 
3052         /* two indirect node blocks */
3053         leaf_count *= NIDS_PER_BLOCK;
3054         result += (leaf_count * 2);
3055 
3056         /* one double indirect node block */
3057         leaf_count *= NIDS_PER_BLOCK;
3058         result += leaf_count;
3059 
3060         return result;
3061 }
3062 
3063 static int __f2fs_commit_super(struct buffer_head *bh,
3064                         struct f2fs_super_block *super)
3065 {
3066         lock_buffer(bh);
3067         if (super)
3068                 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3069         set_buffer_dirty(bh);
3070         unlock_buffer(bh);
3071 
3072         /* it's rare case, we can do fua all the time */
3073         return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3074 }
3075 
3076 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3077                                         struct buffer_head *bh)
3078 {
3079         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3080                                         (bh->b_data + F2FS_SUPER_OFFSET);
3081         struct super_block *sb = sbi->sb;
3082         u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3083         u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3084         u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3085         u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3086         u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3087         u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3088         u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3089         u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3090         u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3091         u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3092         u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3093         u32 segment_count = le32_to_cpu(raw_super->segment_count);
3094         u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3095         u64 main_end_blkaddr = main_blkaddr +
3096                                 (segment_count_main << log_blocks_per_seg);
3097         u64 seg_end_blkaddr = segment0_blkaddr +
3098                                 (segment_count << log_blocks_per_seg);
3099 
3100         if (segment0_blkaddr != cp_blkaddr) {
3101                 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3102                           segment0_blkaddr, cp_blkaddr);
3103                 return true;
3104         }
3105 
3106         if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3107                                                         sit_blkaddr) {
3108                 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3109                           cp_blkaddr, sit_blkaddr,
3110                           segment_count_ckpt << log_blocks_per_seg);
3111                 return true;
3112         }
3113 
3114         if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3115                                                         nat_blkaddr) {
3116                 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3117                           sit_blkaddr, nat_blkaddr,
3118                           segment_count_sit << log_blocks_per_seg);
3119                 return true;
3120         }
3121 
3122         if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3123                                                         ssa_blkaddr) {
3124                 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3125                           nat_blkaddr, ssa_blkaddr,
3126                           segment_count_nat << log_blocks_per_seg);
3127                 return true;
3128         }
3129 
3130         if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3131                                                         main_blkaddr) {
3132                 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3133                           ssa_blkaddr, main_blkaddr,
3134                           segment_count_ssa << log_blocks_per_seg);
3135                 return true;
3136         }
3137 
3138         if (main_end_blkaddr > seg_end_blkaddr) {
3139                 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3140                           main_blkaddr, seg_end_blkaddr,
3141                           segment_count_main << log_blocks_per_seg);
3142                 return true;
3143         } else if (main_end_blkaddr < seg_end_blkaddr) {
3144                 int err = 0;
3145                 char *res;
3146 
3147                 /* fix in-memory information all the time */
3148                 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3149                                 segment0_blkaddr) >> log_blocks_per_seg);
3150 
3151                 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3152                         set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3153                         res = "internally";
3154                 } else {
3155                         err = __f2fs_commit_super(bh, NULL);
3156                         res = err ? "failed" : "done";
3157                 }
3158                 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3159                           res, main_blkaddr, seg_end_blkaddr,
3160                           segment_count_main << log_blocks_per_seg);
3161                 if (err)
3162                         return true;
3163         }
3164         return false;
3165 }
3166 
3167 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3168                                 struct buffer_head *bh)
3169 {
3170         block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3171         block_t total_sections, blocks_per_seg;
3172         struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3173                                         (bh->b_data + F2FS_SUPER_OFFSET);
3174         size_t crc_offset = 0;
3175         __u32 crc = 0;
3176 
3177         if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3178                 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3179                           F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3180                 return -EINVAL;
3181         }
3182 
3183         /* Check checksum_offset and crc in superblock */
3184         if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3185                 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3186                 if (crc_offset !=
3187                         offsetof(struct f2fs_super_block, crc)) {
3188                         f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3189                                   crc_offset);
3190                         return -EFSCORRUPTED;
3191                 }
3192                 crc = le32_to_cpu(raw_super->crc);
3193                 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3194                         f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3195                         return -EFSCORRUPTED;
3196                 }
3197         }
3198 
3199         /* Currently, support only 4KB block size */
3200         if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3201                 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3202                           le32_to_cpu(raw_super->log_blocksize),
3203                           F2FS_BLKSIZE_BITS);
3204                 return -EFSCORRUPTED;
3205         }
3206 
3207         /* check log blocks per segment */
3208         if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3209                 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3210                           le32_to_cpu(raw_super->log_blocks_per_seg));
3211                 return -EFSCORRUPTED;
3212         }
3213 
3214         /* Currently, support 512/1024/2048/4096 bytes sector size */
3215         if (le32_to_cpu(raw_super->log_sectorsize) >
3216                                 F2FS_MAX_LOG_SECTOR_SIZE ||
3217                 le32_to_cpu(raw_super->log_sectorsize) <
3218                                 F2FS_MIN_LOG_SECTOR_SIZE) {
3219                 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3220                           le32_to_cpu(raw_super->log_sectorsize));
3221                 return -EFSCORRUPTED;
3222         }
3223         if (le32_to_cpu(raw_super->log_sectors_per_block) +
3224                 le32_to_cpu(raw_super->log_sectorsize) !=
3225                         F2FS_MAX_LOG_SECTOR_SIZE) {
3226                 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3227                           le32_to_cpu(raw_super->log_sectors_per_block),
3228                           le32_to_cpu(raw_super->log_sectorsize));
3229                 return -EFSCORRUPTED;
3230         }
3231 
3232         segment_count = le32_to_cpu(raw_super->segment_count);
3233         segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3234         segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3235         secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3236         total_sections = le32_to_cpu(raw_super->section_count);
3237 
3238         /* blocks_per_seg should be 512, given the above check */
3239         blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3240 
3241         if (segment_count > F2FS_MAX_SEGMENT ||
3242                                 segment_count < F2FS_MIN_SEGMENTS) {
3243                 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3244                 return -EFSCORRUPTED;
3245         }
3246 
3247         if (total_sections > segment_count_main || total_sections < 1 ||
3248                         segs_per_sec > segment_count || !segs_per_sec) {
3249                 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3250                           segment_count, total_sections, segs_per_sec);
3251                 return -EFSCORRUPTED;
3252         }
3253 
3254         if (segment_count_main != total_sections * segs_per_sec) {
3255                 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3256                           segment_count_main, total_sections, segs_per_sec);
3257                 return -EFSCORRUPTED;
3258         }
3259 
3260         if ((segment_count / segs_per_sec) < total_sections) {
3261                 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3262                           segment_count, segs_per_sec, total_sections);
3263                 return -EFSCORRUPTED;
3264         }
3265 
3266         if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3267                 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3268                           segment_count, le64_to_cpu(raw_super->block_count));
3269                 return -EFSCORRUPTED;
3270         }
3271 
3272         if (RDEV(0).path[0]) {
3273                 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3274                 int i = 1;
3275 
3276                 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3277                         dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3278                         i++;
3279                 }
3280                 if (segment_count != dev_seg_count) {
3281                         f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3282                                         segment_count, dev_seg_count);
3283                         return -EFSCORRUPTED;
3284                 }
3285         } else {
3286                 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3287                                         !bdev_is_zoned(sbi->sb->s_bdev)) {
3288                         f2fs_info(sbi, "Zoned block device path is missing");
3289                         return -EFSCORRUPTED;
3290                 }
3291         }
3292 
3293         if (secs_per_zone > total_sections || !secs_per_zone) {
3294                 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3295                           secs_per_zone, total_sections);
3296                 return -EFSCORRUPTED;
3297         }
3298         if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3299                         raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3300                         (le32_to_cpu(raw_super->extension_count) +
3301                         raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3302                 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3303                           le32_to_cpu(raw_super->extension_count),
3304                           raw_super->hot_ext_count,
3305                           F2FS_MAX_EXTENSION);
3306                 return -EFSCORRUPTED;
3307         }
3308 
3309         if (le32_to_cpu(raw_super->cp_payload) >=
3310                                 (blocks_per_seg - F2FS_CP_PACKS -
3311                                 NR_CURSEG_PERSIST_TYPE)) {
3312                 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3313                           le32_to_cpu(raw_super->cp_payload),
3314                           blocks_per_seg - F2FS_CP_PACKS -
3315                           NR_CURSEG_PERSIST_TYPE);
3316                 return -EFSCORRUPTED;
3317         }
3318 
3319         /* check reserved ino info */
3320         if (le32_to_cpu(raw_super->node_ino) != 1 ||
3321                 le32_to_cpu(raw_super->meta_ino) != 2 ||
3322                 le32_to_cpu(raw_super->root_ino) != 3) {
3323                 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3324                           le32_to_cpu(raw_super->node_ino),
3325                           le32_to_cpu(raw_super->meta_ino),
3326                           le32_to_cpu(raw_super->root_ino));
3327                 return -EFSCORRUPTED;
3328         }
3329 
3330         /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3331         if (sanity_check_area_boundary(sbi, bh))
3332                 return -EFSCORRUPTED;
3333 
3334         return 0;
3335 }
3336 
3337 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3338 {
3339         unsigned int total, fsmeta;
3340         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3341         struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3342         unsigned int ovp_segments, reserved_segments;
3343         unsigned int main_segs, blocks_per_seg;
3344         unsigned int sit_segs, nat_segs;
3345         unsigned int sit_bitmap_size, nat_bitmap_size;
3346         unsigned int log_blocks_per_seg;
3347         unsigned int segment_count_main;
3348         unsigned int cp_pack_start_sum, cp_payload;
3349         block_t user_block_count, valid_user_blocks;
3350         block_t avail_node_count, valid_node_count;
3351         unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3352         int i, j;
3353 
3354         total = le32_to_cpu(raw_super->segment_count);
3355         fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3356         sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3357         fsmeta += sit_segs;
3358         nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3359         fsmeta += nat_segs;
3360         fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3361         fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3362 
3363         if (unlikely(fsmeta >= total))
3364                 return 1;
3365 
3366         ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3367         reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3368 
3369         if (!f2fs_sb_has_readonly(sbi) &&
3370                         unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3371                         ovp_segments == 0 || reserved_segments == 0)) {
3372                 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3373                 return 1;
3374         }
3375         user_block_count = le64_to_cpu(ckpt->user_block_count);
3376         segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3377                         (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3378         log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3379         if (!user_block_count || user_block_count >=
3380                         segment_count_main << log_blocks_per_seg) {
3381                 f2fs_err(sbi, "Wrong user_block_count: %u",
3382                          user_block_count);
3383                 return 1;
3384         }
3385 
3386         valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3387         if (valid_user_blocks > user_block_count) {
3388                 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3389                          valid_user_blocks, user_block_count);
3390                 return 1;
3391         }
3392 
3393         valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3394         avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3395         if (valid_node_count > avail_node_count) {
3396                 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3397                          valid_node_count, avail_node_count);
3398                 return 1;
3399         }
3400 
3401         main_segs = le32_to_cpu(raw_super->segment_count_main);
3402         blocks_per_seg = sbi->blocks_per_seg;
3403 
3404         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3405                 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3406                         le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3407                         return 1;
3408 
3409                 if (f2fs_sb_has_readonly(sbi))
3410                         goto check_data;
3411 
3412                 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3413                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3414                                 le32_to_cpu(ckpt->cur_node_segno[j])) {
3415                                 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3416                                          i, j,
3417                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3418                                 return 1;
3419                         }
3420                 }
3421         }
3422 check_data:
3423         for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3424                 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3425                         le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3426                         return 1;
3427 
3428                 if (f2fs_sb_has_readonly(sbi))
3429                         goto skip_cross;
3430 
3431                 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3432                         if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3433                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3434                                 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3435                                          i, j,
3436                                          le32_to_cpu(ckpt->cur_data_segno[i]));
3437                                 return 1;
3438                         }
3439                 }
3440         }
3441         for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3442                 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3443                         if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3444                                 le32_to_cpu(ckpt->cur_data_segno[j])) {
3445                                 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3446                                          i, j,
3447                                          le32_to_cpu(ckpt->cur_node_segno[i]));
3448                                 return 1;
3449                         }
3450                 }
3451         }
3452 skip_cross:
3453         sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3454         nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3455 
3456         if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3457                 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3458                 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3459                          sit_bitmap_size, nat_bitmap_size);
3460                 return 1;
3461         }
3462 
3463         cp_pack_start_sum = __start_sum_addr(sbi);
3464         cp_payload = __cp_payload(sbi);
3465         if (cp_pack_start_sum < cp_payload + 1 ||
3466                 cp_pack_start_sum > blocks_per_seg - 1 -
3467                         NR_CURSEG_PERSIST_TYPE) {
3468                 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3469                          cp_pack_start_sum);
3470                 return 1;
3471         }
3472 
3473         if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3474                 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3475                 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3476                           "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3477                           "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3478                           le32_to_cpu(ckpt->checksum_offset));
3479                 return 1;
3480         }
3481 
3482         nat_blocks = nat_segs << log_blocks_per_seg;
3483         nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3484         nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3485         if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3486                 (cp_payload + F2FS_CP_PACKS +
3487                 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3488                 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3489                           cp_payload, nat_bits_blocks);
3490                 return -EFSCORRUPTED;
3491         }
3492 
3493         if (unlikely(f2fs_cp_error(sbi))) {
3494                 f2fs_err(sbi, "A bug case: need to run fsck");
3495                 return 1;
3496         }
3497         return 0;
3498 }
3499 
3500 static void init_sb_info(struct f2fs_sb_info *sbi)
3501 {
3502         struct f2fs_super_block *raw_super = sbi->raw_super;
3503         int i;
3504 
3505         sbi->log_sectors_per_block =
3506                 le32_to_cpu(raw_super->log_sectors_per_block);
3507         sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3508         sbi->blocksize = 1 << sbi->log_blocksize;
3509         sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3510         sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3511         sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3512         sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3513         sbi->total_sections = le32_to_cpu(raw_super->section_count);
3514         sbi->total_node_count =
3515                 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3516                         * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3517         F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3518         F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3519         F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3520         sbi->cur_victim_sec = NULL_SECNO;
3521         sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3522         sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3523         sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3524         sbi->migration_granularity = sbi->segs_per_sec;
3525         sbi->seq_file_ra_mul = MIN_RA_MUL;
3526 
3527         sbi->dir_level = DEF_DIR_LEVEL;
3528         sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3529         sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3530         sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3531         sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3532         sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3533         sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3534                                 DEF_UMOUNT_DISCARD_TIMEOUT;
3535         clear_sbi_flag(sbi, SBI_NEED_FSCK);
3536 
3537         for (i = 0; i < NR_COUNT_TYPE; i++)
3538                 atomic_set(&sbi->nr_pages[i], 0);
3539 
3540         for (i = 0; i < META; i++)
3541                 atomic_set(&sbi->wb_sync_req[i], 0);
3542 
3543         INIT_LIST_HEAD(&sbi->s_list);
3544         mutex_init(&sbi->umount_mutex);
3545         init_rwsem(&sbi->io_order_lock);
3546         spin_lock_init(&sbi->cp_lock);
3547 
3548         sbi->dirty_device = 0;
3549         spin_lock_init(&sbi->dev_lock);
3550 
3551         init_rwsem(&sbi->sb_lock);
3552         init_rwsem(&sbi->pin_sem);
3553 }
3554 
3555 static int init_percpu_info(struct f2fs_sb_info *sbi)
3556 {
3557         int err;
3558 
3559         err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3560         if (err)
3561                 return err;
3562 
3563         err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3564                                                                 GFP_KERNEL);
3565         if (err)
3566                 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3567 
3568         return err;
3569 }
3570 
3571 #ifdef CONFIG_BLK_DEV_ZONED
3572 
3573 struct f2fs_report_zones_args {
3574         struct f2fs_dev_info *dev;
3575         bool zone_cap_mismatch;
3576 };
3577 
3578 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3579                               void *data)
3580 {
3581         struct f2fs_report_zones_args *rz_args = data;
3582 
3583         if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3584                 return 0;
3585 
3586         set_bit(idx, rz_args->dev->blkz_seq);
3587         rz_args->dev->zone_capacity_blocks[idx] = zone->capacity >>
3588                                                 F2FS_LOG_SECTORS_PER_BLOCK;
3589         if (zone->len != zone->capacity && !rz_args->zone_cap_mismatch)
3590                 rz_args->zone_cap_mismatch = true;
3591 
3592         return 0;
3593 }
3594 
3595 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3596 {
3597         struct block_device *bdev = FDEV(devi).bdev;
3598         sector_t nr_sectors = bdev_nr_sectors(bdev);
3599         struct f2fs_report_zones_args rep_zone_arg;
3600         int ret;
3601 
3602         if (!f2fs_sb_has_blkzoned(sbi))
3603                 return 0;
3604 
3605         if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3606                                 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3607                 return -EINVAL;
3608         sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3609         if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3610                                 __ilog2_u32(sbi->blocks_per_blkz))
3611                 return -EINVAL;
3612         sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3613         FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3614                                         sbi->log_blocks_per_blkz;
3615         if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3616                 FDEV(devi).nr_blkz++;
3617 
3618         FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3619                                         BITS_TO_LONGS(FDEV(devi).nr_blkz)
3620                                         * sizeof(unsigned long),
3621                                         GFP_KERNEL);
3622         if (!FDEV(devi).blkz_seq)
3623                 return -ENOMEM;
3624 
3625         /* Get block zones type and zone-capacity */
3626         FDEV(devi).zone_capacity_blocks = f2fs_kzalloc(sbi,
3627                                         FDEV(devi).nr_blkz * sizeof(block_t),
3628                                         GFP_KERNEL);
3629         if (!FDEV(devi).zone_capacity_blocks)
3630                 return -ENOMEM;
3631 
3632         rep_zone_arg.dev = &FDEV(devi);
3633         rep_zone_arg.zone_cap_mismatch = false;
3634 
3635         ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3636                                   &rep_zone_arg);
3637         if (ret < 0)
3638                 return ret;
3639 
3640         if (!rep_zone_arg.zone_cap_mismatch) {
3641                 kfree(FDEV(devi).zone_capacity_blocks);
3642                 FDEV(devi).zone_capacity_blocks = NULL;
3643         }
3644 
3645         return 0;
3646 }
3647 #endif
3648 
3649 /*
3650  * Read f2fs raw super block.
3651  * Because we have two copies of super block, so read both of them
3652  * to get the first valid one. If any one of them is broken, we pass
3653  * them recovery flag back to the caller.
3654  */
3655 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3656                         struct f2fs_super_block **raw_super,
3657                         int *valid_super_block, int *recovery)
3658 {
3659         struct super_block *sb = sbi->sb;
3660         int block;
3661         struct buffer_head *bh;
3662         struct f2fs_super_block *super;
3663         int err = 0;
3664 
3665         super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3666         if (!super)
3667                 return -ENOMEM;
3668 
3669         for (block = 0; block < 2; block++) {
3670                 bh = sb_bread(sb, block);
3671                 if (!bh) {
3672                         f2fs_err(sbi, "Unable to read %dth superblock",
3673                                  block + 1);
3674                         err = -EIO;
3675                         *recovery = 1;
3676                         continue;
3677                 }
3678 
3679                 /* sanity checking of raw super */
3680                 err = sanity_check_raw_super(sbi, bh);
3681                 if (err) {
3682                         f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3683                                  block + 1);
3684                         brelse(bh);
3685                         *recovery = 1;
3686                         continue;
3687                 }
3688 
3689                 if (!*raw_super) {
3690                         memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3691                                                         sizeof(*super));
3692                         *valid_super_block = block;
3693                         *raw_super = super;
3694                 }
3695                 brelse(bh);
3696         }
3697 
3698         /* No valid superblock */
3699         if (!*raw_super)
3700                 kfree(super);
3701         else
3702                 err = 0;
3703 
3704         return err;
3705 }
3706 
3707 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3708 {
3709         struct buffer_head *bh;
3710         __u32 crc = 0;
3711         int err;
3712 
3713         if ((recover && f2fs_readonly(sbi->sb)) ||
3714                                 bdev_read_only(sbi->sb->s_bdev)) {
3715                 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3716                 return -EROFS;
3717         }
3718 
3719         /* we should update superblock crc here */
3720         if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3721                 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3722                                 offsetof(struct f2fs_super_block, crc));
3723                 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3724         }
3725 
3726         /* write back-up superblock first */
3727         bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3728         if (!bh)
3729                 return -EIO;
3730         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3731         brelse(bh);
3732 
3733         /* if we are in recovery path, skip writing valid superblock */
3734         if (recover || err)
3735                 return err;
3736 
3737         /* write current valid superblock */
3738         bh = sb_bread(sbi->sb, sbi->valid_super_block);
3739         if (!bh)
3740                 return -EIO;
3741         err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3742         brelse(bh);
3743         return err;
3744 }
3745 
3746 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3747 {
3748         struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3749         unsigned int max_devices = MAX_DEVICES;
3750         int i;
3751 
3752         /* Initialize single device information */
3753         if (!RDEV(0).path[0]) {
3754                 if (!bdev_is_zoned(sbi->sb->s_bdev))
3755                         return 0;
3756                 max_devices = 1;
3757         }
3758 
3759         /*
3760          * Initialize multiple devices information, or single
3761          * zoned block device information.
3762          */
3763         sbi->devs = f2fs_kzalloc(sbi,
3764                                  array_size(max_devices,
3765                                             sizeof(struct f2fs_dev_info)),
3766                                  GFP_KERNEL);
3767         if (!sbi->devs)
3768                 return -ENOMEM;
3769 
3770         for (i = 0; i < max_devices; i++) {
3771 
3772                 if (i > 0 && !RDEV(i).path[0])
3773                         break;
3774 
3775                 if (max_devices == 1) {
3776                         /* Single zoned block device mount */
3777                         FDEV(0).bdev =
3778                                 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3779                                         sbi->sb->s_mode, sbi->sb->s_type);
3780                 } else {
3781                         /* Multi-device mount */
3782                         memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3783                         FDEV(i).total_segments =
3784                                 le32_to_cpu(RDEV(i).total_segments);
3785                         if (i == 0) {
3786                                 FDEV(i).start_blk = 0;
3787                                 FDEV(i).end_blk = FDEV(i).start_blk +
3788                                     (FDEV(i).total_segments <<
3789                                     sbi->log_blocks_per_seg) - 1 +
3790                                     le32_to_cpu(raw_super->segment0_blkaddr);
3791                         } else {
3792                                 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3793                                 FDEV(i).end_blk = FDEV(i).start_blk +
3794                                         (FDEV(i).total_segments <<
3795                                         sbi->log_blocks_per_seg) - 1;
3796                         }
3797                         FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3798                                         sbi->sb->s_mode, sbi->sb->s_type);
3799                 }
3800                 if (IS_ERR(FDEV(i).bdev))
3801                         return PTR_ERR(FDEV(i).bdev);
3802 
3803                 /* to release errored devices */
3804                 sbi->s_ndevs = i + 1;
3805 
3806 #ifdef CONFIG_BLK_DEV_ZONED
3807                 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3808                                 !f2fs_sb_has_blkzoned(sbi)) {
3809                         f2fs_err(sbi, "Zoned block device feature not enabled");
3810                         return -EINVAL;
3811                 }
3812                 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3813                         if (init_blkz_info(sbi, i)) {
3814                                 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3815                                 return -EINVAL;
3816                         }
3817                         if (max_devices == 1)
3818                                 break;
3819                         f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3820                                   i, FDEV(i).path,
3821                                   FDEV(i).total_segments,
3822                                   FDEV(i).start_blk, FDEV(i).end_blk,
3823                                   bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3824                                   "Host-aware" : "Host-managed");
3825                         continue;
3826                 }
3827 #endif
3828                 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3829                           i, FDEV(i).path,
3830                           FDEV(i).total_segments,
3831                           FDEV(i).start_blk, FDEV(i).end_blk);
3832         }
3833         f2fs_info(sbi,
3834                   "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3835         return 0;
3836 }
3837 
3838 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3839 {
3840 #ifdef CONFIG_UNICODE
3841         if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3842                 const struct f2fs_sb_encodings *encoding_info;
3843                 struct unicode_map *encoding;
3844                 __u16 encoding_flags;
3845 
3846                 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3847                                           &encoding_flags)) {
3848                         f2fs_err(sbi,
3849                                  "Encoding requested by superblock is unknown");
3850                         return -EINVAL;
3851                 }
3852 
3853                 encoding = utf8_load(encoding_info->version);
3854                 if (IS_ERR(encoding)) {
3855                         f2fs_err(sbi,
3856                                  "can't mount with superblock charset: %s-%s "
3857                                  "not supported by the kernel. flags: 0x%x.",
3858                                  encoding_info->name, encoding_info->version,
3859                                  encoding_flags);
3860                         return PTR_ERR(encoding);
3861                 }
3862                 f2fs_info(sbi, "Using encoding defined by superblock: "
3863                          "%s-%s with flags 0x%hx", encoding_info->name,
3864                          encoding_info->version?:"\b", encoding_flags);
3865 
3866                 sbi->sb->s_encoding = encoding;
3867                 sbi->sb->s_encoding_flags = encoding_flags;
3868         }
3869 #else
3870         if (f2fs_sb_has_casefold(sbi)) {
3871                 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3872                 return -EINVAL;
3873         }
3874 #endif
3875         return 0;
3876 }
3877 
3878 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3879 {
3880         struct f2fs_sm_info *sm_i = SM_I(sbi);
3881 
3882         /* adjust parameters according to the volume size */
3883         if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3884                 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3885                 if (f2fs_block_unit_discard(sbi))
3886                         sm_i->dcc_info->discard_granularity = 1;
3887                 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3888         }
3889 
3890         sbi->readdir_ra = 1;
3891 }
3892 
3893 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3894 {
3895         struct f2fs_sb_info *sbi;
3896         struct f2fs_super_block *raw_super;
3897         struct inode *root;
3898         int err;
3899         bool skip_recovery = false, need_fsck = false;
3900         char *options = NULL;
3901         int recovery, i, valid_super_block;
3902         struct curseg_info *seg_i;
3903         int retry_cnt = 1;
3904 
3905 try_onemore:
3906         err = -EINVAL;
3907         raw_super = NULL;
3908         valid_super_block = -1;
3909         recovery = 0;
3910 
3911         /* allocate memory for f2fs-specific super block info */
3912         sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3913         if (!sbi)
3914                 return -ENOMEM;
3915 
3916         sbi->sb = sb;
3917 
3918         /* Load the checksum driver */
3919         sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3920         if (IS_ERR(sbi->s_chksum_driver)) {
3921                 f2fs_err(sbi, "Cannot load crc32 driver.");
3922                 err = PTR_ERR(sbi->s_chksum_driver);
3923                 sbi->s_chksum_driver = NULL;
3924                 goto free_sbi;
3925         }
3926 
3927         /* set a block size */
3928         if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3929                 f2fs_err(sbi, "unable to set blocksize");
3930                 goto free_sbi;
3931         }
3932 
3933         err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3934                                                                 &recovery);
3935         if (err)
3936                 goto free_sbi;
3937 
3938         sb->s_fs_info = sbi;
3939         sbi->raw_super = raw_super;
3940 
3941         /* precompute checksum seed for metadata */
3942         if (f2fs_sb_has_inode_chksum(sbi))
3943                 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3944                                                 sizeof(raw_super->uuid));
3945 
3946         default_options(sbi);
3947         /* parse mount options */
3948         options = kstrdup((const char *)data, GFP_KERNEL);
3949         if (data && !options) {
3950                 err = -ENOMEM;
3951                 goto free_sb_buf;
3952         }
3953 
3954         err = parse_options(sb, options, false);
3955         if (err)
3956                 goto free_options;
3957 
3958         sb->s_maxbytes = max_file_blocks(NULL) <<
3959                                 le32_to_cpu(raw_super->log_blocksize);
3960         sb->s_max_links = F2FS_LINK_MAX;
3961 
3962         err = f2fs_setup_casefold(sbi);
3963         if (err)
3964                 goto free_options;
3965 
3966 #ifdef CONFIG_QUOTA
3967         sb->dq_op = &f2fs_quota_operations;
3968         sb->s_qcop = &f2fs_quotactl_ops;
3969         sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3970 
3971         if (f2fs_sb_has_quota_ino(sbi)) {
3972                 for (i = 0; i < MAXQUOTAS; i++) {
3973                         if (f2fs_qf_ino(sbi->sb, i))
3974                                 sbi->nquota_files++;
3975                 }
3976         }
3977 #endif
3978 
3979         sb->s_op = &f2fs_sops;
3980 #ifdef CONFIG_FS_ENCRYPTION
3981         sb->s_cop = &f2fs_cryptops;
3982 #endif
3983 #ifdef CONFIG_FS_VERITY
3984         sb->s_vop = &f2fs_verityops;
3985 #endif
3986         sb->s_xattr = f2fs_xattr_handlers;
3987         sb->s_export_op = &f2fs_export_ops;
3988         sb->s_magic = F2FS_SUPER_MAGIC;
3989         sb->s_time_gran = 1;
3990         sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3991                 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3992         memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3993         sb->s_iflags |= SB_I_CGROUPWB;
3994 
3995         /* init f2fs-specific super block info */
3996         sbi->valid_super_block = valid_super_block;
3997         init_rwsem(&sbi->gc_lock);
3998         mutex_init(&sbi->writepages);
3999         init_rwsem(&sbi->cp_global_sem);
4000         init_rwsem(&sbi->node_write);
4001         init_rwsem(&sbi->node_change);
4002 
4003         /* disallow all the data/node/meta page writes */
4004         set_sbi_flag(sbi, SBI_POR_DOING);
4005         spin_lock_init(&sbi->stat_lock);
4006 
4007         for (i = 0; i < NR_PAGE_TYPE; i++) {
4008                 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4009                 int j;
4010 
4011                 sbi->write_io[i] =
4012                         f2fs_kmalloc(sbi,
4013                                      array_size(n,
4014                                                 sizeof(struct f2fs_bio_info)),
4015                                      GFP_KERNEL);
4016                 if (!sbi->write_io[i]) {
4017                         err = -ENOMEM;
4018                         goto free_bio_info;
4019                 }
4020 
4021                 for (j = HOT; j < n; j++) {
4022                         init_rwsem(&sbi->write_io[i][j].io_rwsem);
4023                         sbi->write_io[i][j].sbi = sbi;
4024                         sbi->write_io[i][j].bio = NULL;
4025                         spin_lock_init(&sbi->write_io[i][j].io_lock);
4026                         INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4027                         INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4028                         init_rwsem(&sbi->write_io[i][j].bio_list_lock);
4029                 }
4030         }
4031 
4032         init_rwsem(&sbi->cp_rwsem);
4033         init_rwsem(&sbi->quota_sem);
4034         init_waitqueue_head(&sbi->cp_wait);
4035         init_sb_info(sbi);
4036 
4037         err = f2fs_init_iostat(sbi);
4038         if (err)
4039                 goto free_bio_info;
4040 
4041         err = init_percpu_info(sbi);
4042         if (err)
4043                 goto free_iostat;
4044 
4045         if (F2FS_IO_ALIGNED(sbi)) {
4046                 sbi->write_io_dummy =
4047                         mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4048                 if (!sbi->write_io_dummy) {
4049                         err = -ENOMEM;
4050                         goto free_percpu;
4051                 }
4052         }
4053 
4054         /* init per sbi slab cache */
4055         err = f2fs_init_xattr_caches(sbi);
4056         if (err)
4057                 goto free_io_dummy;
4058         err = f2fs_init_page_array_cache(sbi);
4059         if (err)
4060                 goto free_xattr_cache;
4061 
4062         /* get an inode for meta space */
4063         sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4064         if (IS_ERR(sbi->meta_inode)) {
4065                 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4066                 err = PTR_ERR(sbi->meta_inode);
4067                 goto free_page_array_cache;
4068         }
4069 
4070         err = f2fs_get_valid_checkpoint(sbi);
4071         if (err) {
4072                 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4073                 goto free_meta_inode;
4074         }
4075 
4076         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4077                 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4078         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4079                 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4080                 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4081         }
4082 
4083         if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4084                 set_sbi_flag(sbi, SBI_NEED_FSCK);
4085 
4086         /* Initialize device list */
4087         err = f2fs_scan_devices(sbi);
4088         if (err) {
4089                 f2fs_err(sbi, "Failed to find devices");
4090                 goto free_devices;
4091         }
4092 
4093         err = f2fs_init_post_read_wq(sbi);
4094         if (err) {
4095                 f2fs_err(sbi, "Failed to initialize post read workqueue");
4096                 goto free_devices;
4097         }
4098 
4099         sbi->total_valid_node_count =
4100                                 le32_to_cpu(sbi->ckpt->valid_node_count);
4101         percpu_counter_set(&sbi->total_valid_inode_count,
4102                                 le32_to_cpu(sbi->ckpt->valid_inode_count));
4103         sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4104         sbi->total_valid_block_count =
4105                                 le64_to_cpu(sbi->ckpt->valid_block_count);
4106         sbi->last_valid_block_count = sbi->total_valid_block_count;
4107         sbi->reserved_blocks = 0;
4108         sbi->current_reserved_blocks = 0;
4109         limit_reserve_root(sbi);
4110         adjust_unusable_cap_perc(sbi);
4111 
4112         for (i = 0; i < NR_INODE_TYPE; i++) {
4113                 INIT_LIST_HEAD(&sbi->inode_list[i]);
4114                 spin_lock_init(&sbi->inode_lock[i]);
4115         }
4116         mutex_init(&sbi->flush_lock);
4117 
4118         f2fs_init_extent_cache_info(sbi);
4119 
4120         f2fs_init_ino_entry_info(sbi);
4121 
4122         f2fs_init_fsync_node_info(sbi);
4123 
4124         /* setup checkpoint request control and start checkpoint issue thread */
4125         f2fs_init_ckpt_req_control(sbi);
4126         if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4127                         test_opt(sbi, MERGE_CHECKPOINT)) {
4128                 err = f2fs_start_ckpt_thread(sbi);
4129                 if (err) {
4130                         f2fs_err(sbi,
4131                             "Failed to start F2FS issue_checkpoint_thread (%d)",
4132                             err);
4133                         goto stop_ckpt_thread;
4134                 }
4135         }
4136 
4137         /* setup f2fs internal modules */
4138         err = f2fs_build_segment_manager(sbi);
4139         if (err) {
4140                 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4141                          err);
4142                 goto free_sm;
4143         }
4144         err = f2fs_build_node_manager(sbi);
4145         if (err) {
4146                 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4147                          err);
4148                 goto free_nm;
4149         }
4150 
4151         /* For write statistics */
4152         sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4153 
4154         /* Read accumulated write IO statistics if exists */
4155         seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4156         if (__exist_node_summaries(sbi))
4157                 sbi->kbytes_written =
4158                         le64_to_cpu(seg_i->journal->info.kbytes_written);
4159 
4160         f2fs_build_gc_manager(sbi);
4161 
4162         err = f2fs_build_stats(sbi);
4163         if (err)
4164                 goto free_nm;
4165 
4166         /* get an inode for node space */
4167         sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4168         if (IS_ERR(sbi->node_inode)) {
4169                 f2fs_err(sbi, "Failed to read node inode");
4170                 err = PTR_ERR(sbi->node_inode);
4171                 goto free_stats;
4172         }
4173 
4174         /* read root inode and dentry */
4175         root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4176         if (IS_ERR(root)) {
4177                 f2fs_err(sbi, "Failed to read root inode");
4178                 err = PTR_ERR(root);
4179                 goto free_node_inode;
4180         }
4181         if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4182                         !root->i_size || !root->i_nlink) {
4183                 iput(root);
4184                 err = -EINVAL;
4185                 goto free_node_inode;
4186         }
4187 
4188         sb->s_root = d_make_root(root); /* allocate root dentry */
4189         if (!sb->s_root) {
4190                 err = -ENOMEM;
4191                 goto free_node_inode;
4192         }
4193 
4194         err = f2fs_init_compress_inode(sbi);
4195         if (err)
4196                 goto free_root_inode;
4197 
4198         err = f2fs_register_sysfs(sbi);
4199         if (err)
4200                 goto free_compress_inode;
4201 
4202 #ifdef CONFIG_QUOTA
4203         /* Enable quota usage during mount */
4204         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4205                 err = f2fs_enable_quotas(sb);
4206                 if (err)
4207                         f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4208         }
4209 #endif
4210         /* if there are any orphan inodes, free them */
4211         err = f2fs_recover_orphan_inodes(sbi);
4212         if (err)
4213                 goto free_meta;
4214 
4215         if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4216                 goto reset_checkpoint;
4217 
4218         /* recover fsynced data */
4219         if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4220                         !test_opt(sbi, NORECOVERY)) {
4221                 /*
4222                  * mount should be failed, when device has readonly mode, and
4223                  * previous checkpoint was not done by clean system shutdown.
4224                  */
4225                 if (f2fs_hw_is_readonly(sbi)) {
4226                         if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4227                                 err = f2fs_recover_fsync_data(sbi, true);
4228                                 if (err > 0) {
4229                                         err = -EROFS;
4230                                         f2fs_err(sbi, "Need to recover fsync data, but "
4231                                                 "write access unavailable, please try "
4232                                                 "mount w/ disable_roll_forward or norecovery");
4233                                 }
4234                                 if (err < 0)
4235                                         goto free_meta;
4236                         }
4237                         f2fs_info(sbi, "write access unavailable, skipping recovery");
4238                         goto reset_checkpoint;
4239                 }
4240 
4241                 if (need_fsck)
4242                         set_sbi_flag(sbi, SBI_NEED_FSCK);
4243 
4244                 if (skip_recovery)
4245                         goto reset_checkpoint;
4246 
4247                 err = f2fs_recover_fsync_data(sbi, false);
4248                 if (err < 0) {
4249                         if (err != -ENOMEM)
4250                                 skip_recovery = true;
4251                         need_fsck = true;
4252                         f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4253                                  err);
4254                         goto free_meta;
4255                 }
4256         } else {
4257                 err = f2fs_recover_fsync_data(sbi, true);
4258 
4259                 if (!f2fs_readonly(sb) && err > 0) {
4260                         err = -EINVAL;
4261                         f2fs_err(sbi, "Need to recover fsync data");
4262                         goto free_meta;
4263                 }
4264         }
4265 
4266         /*
4267          * If the f2fs is not readonly and fsync data recovery succeeds,
4268          * check zoned block devices' write pointer consistency.
4269          */
4270         if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4271                 err = f2fs_check_write_pointer(sbi);
4272                 if (err)
4273                         goto free_meta;
4274         }
4275 
4276 reset_checkpoint:
4277         f2fs_init_inmem_curseg(sbi);
4278 
4279         /* f2fs_recover_fsync_data() cleared this already */
4280         clear_sbi_flag(sbi, SBI_POR_DOING);
4281 
4282         if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4283                 err = f2fs_disable_checkpoint(sbi);
4284                 if (err)
4285                         goto sync_free_meta;
4286         } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4287                 f2fs_enable_checkpoint(sbi);
4288         }
4289 
4290         /*
4291          * If filesystem is not mounted as read-only then
4292          * do start the gc_thread.
4293          */
4294         if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4295                 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4296                 /* After POR, we can run background GC thread.*/
4297                 err = f2fs_start_gc_thread(sbi);
4298                 if (err)
4299                         goto sync_free_meta;
4300         }
4301         kvfree(options);
4302 
4303         /* recover broken superblock */
4304         if (recovery) {
4305                 err = f2fs_commit_super(sbi, true);
4306                 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4307                           sbi->valid_super_block ? 1 : 2, err);
4308         }
4309 
4310         f2fs_join_shrinker(sbi);
4311 
4312         f2fs_tuning_parameters(sbi);
4313 
4314         f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4315                     cur_cp_version(F2FS_CKPT(sbi)));
4316         f2fs_update_time(sbi, CP_TIME);
4317         f2fs_update_time(sbi, REQ_TIME);
4318         clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4319         return 0;
4320 
4321 sync_free_meta:
4322         /* safe to flush all the data */
4323         sync_filesystem(sbi->sb);
4324         retry_cnt = 0;
4325 
4326 free_meta:
4327 #ifdef CONFIG_QUOTA
4328         f2fs_truncate_quota_inode_pages(sb);
4329         if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4330                 f2fs_quota_off_umount(sbi->sb);
4331 #endif
4332         /*
4333          * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4334          * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4335          * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4336          * falls into an infinite loop in f2fs_sync_meta_pages().
4337          */
4338         truncate_inode_pages_final(META_MAPPING(sbi));
4339         /* evict some inodes being cached by GC */
4340         evict_inodes(sb);
4341         f2fs_unregister_sysfs(sbi);
4342 free_compress_inode:
4343         f2fs_destroy_compress_inode(sbi);
4344 free_root_inode:
4345         dput(sb->s_root);
4346         sb->s_root = NULL;
4347 free_node_inode:
4348         f2fs_release_ino_entry(sbi, true);
4349         truncate_inode_pages_final(NODE_MAPPING(sbi));
4350         iput(sbi->node_inode);
4351         sbi->node_inode = NULL;
4352 free_stats:
4353         f2fs_destroy_stats(sbi);
4354 free_nm:
4355         f2fs_destroy_node_manager(sbi);
4356 free_sm:
4357         f2fs_destroy_segment_manager(sbi);
4358         f2fs_destroy_post_read_wq(sbi);
4359 stop_ckpt_thread:
4360         f2fs_stop_ckpt_thread(sbi);
4361 free_devices:
4362         destroy_device_list(sbi);
4363         kvfree(sbi->ckpt);
4364 free_meta_inode:
4365         make_bad_inode(sbi->meta_inode);
4366         iput(sbi->meta_inode);
4367         sbi->meta_inode = NULL;
4368 free_page_array_cache:
4369         f2fs_destroy_page_array_cache(sbi);
4370 free_xattr_cache:
4371         f2fs_destroy_xattr_caches(sbi);
4372 free_io_dummy:
4373         mempool_destroy(sbi->write_io_dummy);
4374 free_percpu:
4375         destroy_percpu_info(sbi);
4376 free_iostat:
4377         f2fs_destroy_iostat(sbi);
4378 free_bio_info:
4379         for (i = 0; i < NR_PAGE_TYPE; i++)
4380                 kvfree(sbi->write_io[i]);
4381 
4382 #ifdef CONFIG_UNICODE
4383         utf8_unload(sb->s_encoding);
4384         sb->s_encoding = NULL;
4385 #endif
4386 free_options:
4387 #ifdef CONFIG_QUOTA
4388         for (i = 0; i < MAXQUOTAS; i++)
4389                 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4390 #endif
4391         fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4392         kvfree(options);
4393 free_sb_buf:
4394         kfree(raw_super);
4395 free_sbi:
4396         if (sbi->s_chksum_driver)
4397                 crypto_free_shash(sbi->s_chksum_driver);
4398         kfree(sbi);
4399 
4400         /* give only one another chance */
4401         if (retry_cnt > 0 && skip_recovery) {
4402                 retry_cnt--;
4403                 shrink_dcache_sb(sb);
4404                 goto try_onemore;
4405         }
4406         return err;
4407 }
4408 
4409 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4410                         const char *dev_name, void *data)
4411 {
4412         return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4413 }
4414 
4415 static void kill_f2fs_super(struct super_block *sb)
4416 {
4417         if (sb->s_root) {
4418                 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4419 
4420                 set_sbi_flag(sbi, SBI_IS_CLOSE);
4421                 f2fs_stop_gc_thread(sbi);
4422                 f2fs_stop_discard_thread(sbi);
4423 
4424 #ifdef CONFIG_F2FS_FS_COMPRESSION
4425                 /*
4426                  * latter evict_inode() can bypass checking and invalidating
4427                  * compress inode cache.
4428                  */
4429                 if (test_opt(sbi, COMPRESS_CACHE))
4430                         truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4431 #endif
4432 
4433                 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4434                                 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4435                         struct cp_control cpc = {
4436                                 .reason = CP_UMOUNT,
4437                         };
4438                         f2fs_write_checkpoint(sbi, &cpc);
4439                 }
4440 
4441                 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4442                         sb->s_flags &= ~SB_RDONLY;
4443         }
4444         kill_block_super(sb);
4445 }
4446 
4447 static struct file_system_type f2fs_fs_type = {
4448         .owner          = THIS_MODULE,
4449         .name           = "f2fs",
4450         .mount          = f2fs_mount,
4451         .kill_sb        = kill_f2fs_super,
4452         .fs_flags       = FS_REQUIRES_DEV,
4453 };
4454 MODULE_ALIAS_FS("f2fs");
4455 
4456 static int __init init_inodecache(void)
4457 {
4458         f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4459                         sizeof(struct f2fs_inode_info), 0,
4460                         SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4461         if (!f2fs_inode_cachep)
4462                 return -ENOMEM;
4463         return 0;
4464 }
4465 
4466 static void destroy_inodecache(void)
4467 {
4468         /*
4469          * Make sure all delayed rcu free inodes are flushed before we
4470          * destroy cache.
4471          */
4472         rcu_barrier();
4473         kmem_cache_destroy(f2fs_inode_cachep);
4474 }
4475 
4476 static int __init init_f2fs_fs(void)
4477 {
4478         int err;
4479 
4480         if (PAGE_SIZE != F2FS_BLKSIZE) {
4481                 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4482                                 PAGE_SIZE, F2FS_BLKSIZE);
4483                 return -EINVAL;
4484         }
4485 
4486         err = init_inodecache();
4487         if (err)
4488                 goto fail;
4489         err = f2fs_create_node_manager_caches();
4490         if (err)
4491                 goto free_inodecache;
4492         err = f2fs_create_segment_manager_caches();
4493         if (err)
4494                 goto free_node_manager_caches;
4495         err = f2fs_create_checkpoint_caches();
4496         if (err)
4497                 goto free_segment_manager_caches;
4498         err = f2fs_create_recovery_cache();
4499         if (err)
4500                 goto free_checkpoint_caches;
4501         err = f2fs_create_extent_cache();
4502         if (err)
4503                 goto free_recovery_cache;
4504         err = f2fs_create_garbage_collection_cache();
4505         if (err)
4506                 goto free_extent_cache;
4507         err = f2fs_init_sysfs();
4508         if (err)
4509                 goto free_garbage_collection_cache;
4510         err = register_shrinker(&f2fs_shrinker_info);
4511         if (err)
4512                 goto free_sysfs;
4513         err = register_filesystem(&f2fs_fs_type);
4514         if (err)
4515                 goto free_shrinker;
4516         f2fs_create_root_stats();
4517         err = f2fs_init_post_read_processing();
4518         if (err)
4519                 goto free_root_stats;
4520         err = f2fs_init_iostat_processing();
4521         if (err)
4522                 goto free_post_read;
4523         err = f2fs_init_bio_entry_cache();
4524         if (err)
4525                 goto free_iostat;
4526         err = f2fs_init_bioset();
4527         if (err)
4528                 goto free_bio_enrty_cache;
4529         err = f2fs_init_compress_mempool();
4530         if (err)
4531                 goto free_bioset;
4532         err = f2fs_init_compress_cache();
4533         if (err)
4534                 goto free_compress_mempool;
4535         err = f2fs_create_casefold_cache();
4536         if (err)
4537                 goto free_compress_cache;
4538         return 0;
4539 free_compress_cache:
4540         f2fs_destroy_compress_cache();
4541 free_compress_mempool:
4542         f2fs_destroy_compress_mempool();
4543 free_bioset:
4544         f2fs_destroy_bioset();
4545 free_bio_enrty_cache:
4546         f2fs_destroy_bio_entry_cache();
4547 free_iostat:
4548         f2fs_destroy_iostat_processing();
4549 free_post_read:
4550         f2fs_destroy_post_read_processing();
4551 free_root_stats:
4552         f2fs_destroy_root_stats();
4553         unregister_filesystem(&f2fs_fs_type);
4554 free_shrinker:
4555         unregister_shrinker(&f2fs_shrinker_info);
4556 free_sysfs:
4557         f2fs_exit_sysfs();
4558 free_garbage_collection_cache:
4559         f2fs_destroy_garbage_collection_cache();
4560 free_extent_cache:
4561         f2fs_destroy_extent_cache();
4562 free_recovery_cache:
4563         f2fs_destroy_recovery_cache();
4564 free_checkpoint_caches:
4565         f2fs_destroy_checkpoint_caches();
4566 free_segment_manager_caches:
4567         f2fs_destroy_segment_manager_caches();
4568 free_node_manager_caches:
4569         f2fs_destroy_node_manager_caches();
4570 free_inodecache:
4571         destroy_inodecache();
4572 fail:
4573         return err;
4574 }
4575 
4576 static void __exit exit_f2fs_fs(void)
4577 {
4578         f2fs_destroy_casefold_cache();
4579         f2fs_destroy_compress_cache();
4580         f2fs_destroy_compress_mempool();
4581         f2fs_destroy_bioset();
4582         f2fs_destroy_bio_entry_cache();
4583         f2fs_destroy_iostat_processing();
4584         f2fs_destroy_post_read_processing();
4585         f2fs_destroy_root_stats();
4586         unregister_filesystem(&f2fs_fs_type);
4587         unregister_shrinker(&f2fs_shrinker_info);
4588         f2fs_exit_sysfs();
4589         f2fs_destroy_garbage_collection_cache();
4590         f2fs_destroy_extent_cache();
4591         f2fs_destroy_recovery_cache();
4592         f2fs_destroy_checkpoint_caches();
4593         f2fs_destroy_segment_manager_caches();
4594         f2fs_destroy_node_manager_caches();
4595         destroy_inodecache();
4596 }
4597 
4598 module_init(init_f2fs_fs)
4599 module_exit(exit_f2fs_fs)
4600 
4601 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4602 MODULE_DESCRIPTION("Flash Friendly File System");
4603 MODULE_LICENSE("GPL");
4604 MODULE_SOFTDEP("pre: crc32");
4605 
4606 

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