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Merge tag 'icc-5.4-rc1' of https://git.linaro.org/people/georgi.djakov/linux into...
[linux/fpc-iii.git] / fs / f2fs / super.c
blob78a1b873e48ade9259c2592bd263fb86f22fdf16
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
27 #include "f2fs.h"
28 #include "node.h"
29 #include "segment.h"
30 #include "xattr.h"
31 #include "gc.h"
32 #include "trace.h"
33
34 #define CREATE_TRACE_POINTS
35 #include <trace/events/f2fs.h>
36
37 static struct kmem_cache *f2fs_inode_cachep;
38
39 #ifdef CONFIG_F2FS_FAULT_INJECTION
40
41 const char *f2fs_fault_name[FAULT_MAX] = {
42 [FAULT_KMALLOC] = "kmalloc",
43 [FAULT_KVMALLOC] = "kvmalloc",
44 [FAULT_PAGE_ALLOC] = "page alloc",
45 [FAULT_PAGE_GET] = "page get",
46 [FAULT_ALLOC_BIO] = "alloc bio",
47 [FAULT_ALLOC_NID] = "alloc nid",
48 [FAULT_ORPHAN] = "orphan",
49 [FAULT_BLOCK] = "no more block",
50 [FAULT_DIR_DEPTH] = "too big dir depth",
51 [FAULT_EVICT_INODE] = "evict_inode fail",
52 [FAULT_TRUNCATE] = "truncate fail",
53 [FAULT_READ_IO] = "read IO error",
54 [FAULT_CHECKPOINT] = "checkpoint error",
55 [FAULT_DISCARD] = "discard error",
56 [FAULT_WRITE_IO] = "write IO error",
57 };
58
59 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
60 unsigned int type)
61 {
62 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
63
64 if (rate) {
65 atomic_set(&ffi->inject_ops, 0);
66 ffi->inject_rate = rate;
67 }
68
69 if (type)
70 ffi->inject_type = type;
71
72 if (!rate && !type)
73 memset(ffi, 0, sizeof(struct f2fs_fault_info));
74 }
75 #endif
76
77 /* f2fs-wide shrinker description */
78 static struct shrinker f2fs_shrinker_info = {
79 .scan_objects = f2fs_shrink_scan,
80 .count_objects = f2fs_shrink_count,
81 .seeks = DEFAULT_SEEKS,
82 };
83
84 enum {
85 Opt_gc_background,
86 Opt_disable_roll_forward,
87 Opt_norecovery,
88 Opt_discard,
89 Opt_nodiscard,
90 Opt_noheap,
91 Opt_heap,
92 Opt_user_xattr,
93 Opt_nouser_xattr,
94 Opt_acl,
95 Opt_noacl,
96 Opt_active_logs,
97 Opt_disable_ext_identify,
98 Opt_inline_xattr,
99 Opt_noinline_xattr,
100 Opt_inline_xattr_size,
101 Opt_inline_data,
102 Opt_inline_dentry,
103 Opt_noinline_dentry,
104 Opt_flush_merge,
105 Opt_noflush_merge,
106 Opt_nobarrier,
107 Opt_fastboot,
108 Opt_extent_cache,
109 Opt_noextent_cache,
110 Opt_noinline_data,
111 Opt_data_flush,
112 Opt_reserve_root,
113 Opt_resgid,
114 Opt_resuid,
115 Opt_mode,
116 Opt_io_size_bits,
117 Opt_fault_injection,
118 Opt_fault_type,
119 Opt_lazytime,
120 Opt_nolazytime,
121 Opt_quota,
122 Opt_noquota,
123 Opt_usrquota,
124 Opt_grpquota,
125 Opt_prjquota,
126 Opt_usrjquota,
127 Opt_grpjquota,
128 Opt_prjjquota,
129 Opt_offusrjquota,
130 Opt_offgrpjquota,
131 Opt_offprjjquota,
132 Opt_jqfmt_vfsold,
133 Opt_jqfmt_vfsv0,
134 Opt_jqfmt_vfsv1,
135 Opt_whint,
136 Opt_alloc,
137 Opt_fsync,
138 Opt_test_dummy_encryption,
139 Opt_checkpoint_disable,
140 Opt_checkpoint_disable_cap,
141 Opt_checkpoint_disable_cap_perc,
142 Opt_checkpoint_enable,
143 Opt_err,
144 };
145
146 static match_table_t f2fs_tokens = {
147 {Opt_gc_background, "background_gc=%s"},
148 {Opt_disable_roll_forward, "disable_roll_forward"},
149 {Opt_norecovery, "norecovery"},
150 {Opt_discard, "discard"},
151 {Opt_nodiscard, "nodiscard"},
152 {Opt_noheap, "no_heap"},
153 {Opt_heap, "heap"},
154 {Opt_user_xattr, "user_xattr"},
155 {Opt_nouser_xattr, "nouser_xattr"},
156 {Opt_acl, "acl"},
157 {Opt_noacl, "noacl"},
158 {Opt_active_logs, "active_logs=%u"},
159 {Opt_disable_ext_identify, "disable_ext_identify"},
160 {Opt_inline_xattr, "inline_xattr"},
161 {Opt_noinline_xattr, "noinline_xattr"},
162 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
163 {Opt_inline_data, "inline_data"},
164 {Opt_inline_dentry, "inline_dentry"},
165 {Opt_noinline_dentry, "noinline_dentry"},
166 {Opt_flush_merge, "flush_merge"},
167 {Opt_noflush_merge, "noflush_merge"},
168 {Opt_nobarrier, "nobarrier"},
169 {Opt_fastboot, "fastboot"},
170 {Opt_extent_cache, "extent_cache"},
171 {Opt_noextent_cache, "noextent_cache"},
172 {Opt_noinline_data, "noinline_data"},
173 {Opt_data_flush, "data_flush"},
174 {Opt_reserve_root, "reserve_root=%u"},
175 {Opt_resgid, "resgid=%u"},
176 {Opt_resuid, "resuid=%u"},
177 {Opt_mode, "mode=%s"},
178 {Opt_io_size_bits, "io_bits=%u"},
179 {Opt_fault_injection, "fault_injection=%u"},
180 {Opt_fault_type, "fault_type=%u"},
181 {Opt_lazytime, "lazytime"},
182 {Opt_nolazytime, "nolazytime"},
183 {Opt_quota, "quota"},
184 {Opt_noquota, "noquota"},
185 {Opt_usrquota, "usrquota"},
186 {Opt_grpquota, "grpquota"},
187 {Opt_prjquota, "prjquota"},
188 {Opt_usrjquota, "usrjquota=%s"},
189 {Opt_grpjquota, "grpjquota=%s"},
190 {Opt_prjjquota, "prjjquota=%s"},
191 {Opt_offusrjquota, "usrjquota="},
192 {Opt_offgrpjquota, "grpjquota="},
193 {Opt_offprjjquota, "prjjquota="},
194 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
195 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
196 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
197 {Opt_whint, "whint_mode=%s"},
198 {Opt_alloc, "alloc_mode=%s"},
199 {Opt_fsync, "fsync_mode=%s"},
200 {Opt_test_dummy_encryption, "test_dummy_encryption"},
201 {Opt_checkpoint_disable, "checkpoint=disable"},
202 {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
203 {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
204 {Opt_checkpoint_enable, "checkpoint=enable"},
205 {Opt_err, NULL},
206 };
207
208 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
209 {
210 struct va_format vaf;
211 va_list args;
212 int level;
213
214 va_start(args, fmt);
215
216 level = printk_get_level(fmt);
217 vaf.fmt = printk_skip_level(fmt);
218 vaf.va = &args;
219 printk("%c%cF2FS-fs (%s): %pV\n",
220 KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
221
222 va_end(args);
223 }
224
225 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
226 {
227 block_t limit = min((sbi->user_block_count << 1) / 1000,
228 sbi->user_block_count - sbi->reserved_blocks);
229
230 /* limit is 0.2% */
231 if (test_opt(sbi, RESERVE_ROOT) &&
232 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
233 F2FS_OPTION(sbi).root_reserved_blocks = limit;
234 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
235 F2FS_OPTION(sbi).root_reserved_blocks);
236 }
237 if (!test_opt(sbi, RESERVE_ROOT) &&
238 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
239 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
240 !gid_eq(F2FS_OPTION(sbi).s_resgid,
241 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
242 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
243 from_kuid_munged(&init_user_ns,
244 F2FS_OPTION(sbi).s_resuid),
245 from_kgid_munged(&init_user_ns,
246 F2FS_OPTION(sbi).s_resgid));
247 }
248
249 static void init_once(void *foo)
250 {
251 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
252
253 inode_init_once(&fi->vfs_inode);
254 }
255
256 #ifdef CONFIG_QUOTA
257 static const char * const quotatypes[] = INITQFNAMES;
258 #define QTYPE2NAME(t) (quotatypes[t])
259 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
260 substring_t *args)
261 {
262 struct f2fs_sb_info *sbi = F2FS_SB(sb);
263 char *qname;
264 int ret = -EINVAL;
265
266 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
267 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
268 return -EINVAL;
269 }
270 if (f2fs_sb_has_quota_ino(sbi)) {
271 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
272 return 0;
273 }
274
275 qname = match_strdup(args);
276 if (!qname) {
277 f2fs_err(sbi, "Not enough memory for storing quotafile name");
278 return -ENOMEM;
279 }
280 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
281 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
282 ret = 0;
283 else
284 f2fs_err(sbi, "%s quota file already specified",
285 QTYPE2NAME(qtype));
286 goto errout;
287 }
288 if (strchr(qname, '/')) {
289 f2fs_err(sbi, "quotafile must be on filesystem root");
290 goto errout;
291 }
292 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
293 set_opt(sbi, QUOTA);
294 return 0;
295 errout:
296 kvfree(qname);
297 return ret;
298 }
299
300 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
301 {
302 struct f2fs_sb_info *sbi = F2FS_SB(sb);
303
304 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
305 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
306 return -EINVAL;
307 }
308 kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
309 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
310 return 0;
311 }
312
313 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
314 {
315 /*
316 * We do the test below only for project quotas. 'usrquota' and
317 * 'grpquota' mount options are allowed even without quota feature
318 * to support legacy quotas in quota files.
319 */
320 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
321 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
322 return -1;
323 }
324 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
325 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
326 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
327 if (test_opt(sbi, USRQUOTA) &&
328 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
329 clear_opt(sbi, USRQUOTA);
330
331 if (test_opt(sbi, GRPQUOTA) &&
332 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
333 clear_opt(sbi, GRPQUOTA);
334
335 if (test_opt(sbi, PRJQUOTA) &&
336 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
337 clear_opt(sbi, PRJQUOTA);
338
339 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
340 test_opt(sbi, PRJQUOTA)) {
341 f2fs_err(sbi, "old and new quota format mixing");
342 return -1;
343 }
344
345 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
346 f2fs_err(sbi, "journaled quota format not specified");
347 return -1;
348 }
349 }
350
351 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
352 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
353 F2FS_OPTION(sbi).s_jquota_fmt = 0;
354 }
355 return 0;
356 }
357 #endif
358
359 static int parse_options(struct super_block *sb, char *options)
360 {
361 struct f2fs_sb_info *sbi = F2FS_SB(sb);
362 substring_t args[MAX_OPT_ARGS];
363 char *p, *name;
364 int arg = 0;
365 kuid_t uid;
366 kgid_t gid;
367 #ifdef CONFIG_QUOTA
368 int ret;
369 #endif
370
371 if (!options)
372 return 0;
373
374 while ((p = strsep(&options, ",")) != NULL) {
375 int token;
376 if (!*p)
377 continue;
378 /*
379 * Initialize args struct so we know whether arg was
380 * found; some options take optional arguments.
381 */
382 args[0].to = args[0].from = NULL;
383 token = match_token(p, f2fs_tokens, args);
384
385 switch (token) {
386 case Opt_gc_background:
387 name = match_strdup(&args[0]);
388
389 if (!name)
390 return -ENOMEM;
391 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
392 set_opt(sbi, BG_GC);
393 clear_opt(sbi, FORCE_FG_GC);
394 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
395 clear_opt(sbi, BG_GC);
396 clear_opt(sbi, FORCE_FG_GC);
397 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
398 set_opt(sbi, BG_GC);
399 set_opt(sbi, FORCE_FG_GC);
400 } else {
401 kvfree(name);
402 return -EINVAL;
403 }
404 kvfree(name);
405 break;
406 case Opt_disable_roll_forward:
407 set_opt(sbi, DISABLE_ROLL_FORWARD);
408 break;
409 case Opt_norecovery:
410 /* this option mounts f2fs with ro */
411 set_opt(sbi, DISABLE_ROLL_FORWARD);
412 if (!f2fs_readonly(sb))
413 return -EINVAL;
414 break;
415 case Opt_discard:
416 set_opt(sbi, DISCARD);
417 break;
418 case Opt_nodiscard:
419 if (f2fs_sb_has_blkzoned(sbi)) {
420 f2fs_warn(sbi, "discard is required for zoned block devices");
421 return -EINVAL;
422 }
423 clear_opt(sbi, DISCARD);
424 break;
425 case Opt_noheap:
426 set_opt(sbi, NOHEAP);
427 break;
428 case Opt_heap:
429 clear_opt(sbi, NOHEAP);
430 break;
431 #ifdef CONFIG_F2FS_FS_XATTR
432 case Opt_user_xattr:
433 set_opt(sbi, XATTR_USER);
434 break;
435 case Opt_nouser_xattr:
436 clear_opt(sbi, XATTR_USER);
437 break;
438 case Opt_inline_xattr:
439 set_opt(sbi, INLINE_XATTR);
440 break;
441 case Opt_noinline_xattr:
442 clear_opt(sbi, INLINE_XATTR);
443 break;
444 case Opt_inline_xattr_size:
445 if (args->from && match_int(args, &arg))
446 return -EINVAL;
447 set_opt(sbi, INLINE_XATTR_SIZE);
448 F2FS_OPTION(sbi).inline_xattr_size = arg;
449 break;
450 #else
451 case Opt_user_xattr:
452 f2fs_info(sbi, "user_xattr options not supported");
453 break;
454 case Opt_nouser_xattr:
455 f2fs_info(sbi, "nouser_xattr options not supported");
456 break;
457 case Opt_inline_xattr:
458 f2fs_info(sbi, "inline_xattr options not supported");
459 break;
460 case Opt_noinline_xattr:
461 f2fs_info(sbi, "noinline_xattr options not supported");
462 break;
463 #endif
464 #ifdef CONFIG_F2FS_FS_POSIX_ACL
465 case Opt_acl:
466 set_opt(sbi, POSIX_ACL);
467 break;
468 case Opt_noacl:
469 clear_opt(sbi, POSIX_ACL);
470 break;
471 #else
472 case Opt_acl:
473 f2fs_info(sbi, "acl options not supported");
474 break;
475 case Opt_noacl:
476 f2fs_info(sbi, "noacl options not supported");
477 break;
478 #endif
479 case Opt_active_logs:
480 if (args->from && match_int(args, &arg))
481 return -EINVAL;
482 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
483 return -EINVAL;
484 F2FS_OPTION(sbi).active_logs = arg;
485 break;
486 case Opt_disable_ext_identify:
487 set_opt(sbi, DISABLE_EXT_IDENTIFY);
488 break;
489 case Opt_inline_data:
490 set_opt(sbi, INLINE_DATA);
491 break;
492 case Opt_inline_dentry:
493 set_opt(sbi, INLINE_DENTRY);
494 break;
495 case Opt_noinline_dentry:
496 clear_opt(sbi, INLINE_DENTRY);
497 break;
498 case Opt_flush_merge:
499 set_opt(sbi, FLUSH_MERGE);
500 break;
501 case Opt_noflush_merge:
502 clear_opt(sbi, FLUSH_MERGE);
503 break;
504 case Opt_nobarrier:
505 set_opt(sbi, NOBARRIER);
506 break;
507 case Opt_fastboot:
508 set_opt(sbi, FASTBOOT);
509 break;
510 case Opt_extent_cache:
511 set_opt(sbi, EXTENT_CACHE);
512 break;
513 case Opt_noextent_cache:
514 clear_opt(sbi, EXTENT_CACHE);
515 break;
516 case Opt_noinline_data:
517 clear_opt(sbi, INLINE_DATA);
518 break;
519 case Opt_data_flush:
520 set_opt(sbi, DATA_FLUSH);
521 break;
522 case Opt_reserve_root:
523 if (args->from && match_int(args, &arg))
524 return -EINVAL;
525 if (test_opt(sbi, RESERVE_ROOT)) {
526 f2fs_info(sbi, "Preserve previous reserve_root=%u",
527 F2FS_OPTION(sbi).root_reserved_blocks);
528 } else {
529 F2FS_OPTION(sbi).root_reserved_blocks = arg;
530 set_opt(sbi, RESERVE_ROOT);
531 }
532 break;
533 case Opt_resuid:
534 if (args->from && match_int(args, &arg))
535 return -EINVAL;
536 uid = make_kuid(current_user_ns(), arg);
537 if (!uid_valid(uid)) {
538 f2fs_err(sbi, "Invalid uid value %d", arg);
539 return -EINVAL;
540 }
541 F2FS_OPTION(sbi).s_resuid = uid;
542 break;
543 case Opt_resgid:
544 if (args->from && match_int(args, &arg))
545 return -EINVAL;
546 gid = make_kgid(current_user_ns(), arg);
547 if (!gid_valid(gid)) {
548 f2fs_err(sbi, "Invalid gid value %d", arg);
549 return -EINVAL;
550 }
551 F2FS_OPTION(sbi).s_resgid = gid;
552 break;
553 case Opt_mode:
554 name = match_strdup(&args[0]);
555
556 if (!name)
557 return -ENOMEM;
558 if (strlen(name) == 8 &&
559 !strncmp(name, "adaptive", 8)) {
560 if (f2fs_sb_has_blkzoned(sbi)) {
561 f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
562 kvfree(name);
563 return -EINVAL;
564 }
565 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
566 } else if (strlen(name) == 3 &&
567 !strncmp(name, "lfs", 3)) {
568 set_opt_mode(sbi, F2FS_MOUNT_LFS);
569 } else {
570 kvfree(name);
571 return -EINVAL;
572 }
573 kvfree(name);
574 break;
575 case Opt_io_size_bits:
576 if (args->from && match_int(args, &arg))
577 return -EINVAL;
578 if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
579 f2fs_warn(sbi, "Not support %d, larger than %d",
580 1 << arg, BIO_MAX_PAGES);
581 return -EINVAL;
582 }
583 F2FS_OPTION(sbi).write_io_size_bits = arg;
584 break;
585 #ifdef CONFIG_F2FS_FAULT_INJECTION
586 case Opt_fault_injection:
587 if (args->from && match_int(args, &arg))
588 return -EINVAL;
589 f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
590 set_opt(sbi, FAULT_INJECTION);
591 break;
592
593 case Opt_fault_type:
594 if (args->from && match_int(args, &arg))
595 return -EINVAL;
596 f2fs_build_fault_attr(sbi, 0, arg);
597 set_opt(sbi, FAULT_INJECTION);
598 break;
599 #else
600 case Opt_fault_injection:
601 f2fs_info(sbi, "fault_injection options not supported");
602 break;
603
604 case Opt_fault_type:
605 f2fs_info(sbi, "fault_type options not supported");
606 break;
607 #endif
608 case Opt_lazytime:
609 sb->s_flags |= SB_LAZYTIME;
610 break;
611 case Opt_nolazytime:
612 sb->s_flags &= ~SB_LAZYTIME;
613 break;
614 #ifdef CONFIG_QUOTA
615 case Opt_quota:
616 case Opt_usrquota:
617 set_opt(sbi, USRQUOTA);
618 break;
619 case Opt_grpquota:
620 set_opt(sbi, GRPQUOTA);
621 break;
622 case Opt_prjquota:
623 set_opt(sbi, PRJQUOTA);
624 break;
625 case Opt_usrjquota:
626 ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
627 if (ret)
628 return ret;
629 break;
630 case Opt_grpjquota:
631 ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
632 if (ret)
633 return ret;
634 break;
635 case Opt_prjjquota:
636 ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
637 if (ret)
638 return ret;
639 break;
640 case Opt_offusrjquota:
641 ret = f2fs_clear_qf_name(sb, USRQUOTA);
642 if (ret)
643 return ret;
644 break;
645 case Opt_offgrpjquota:
646 ret = f2fs_clear_qf_name(sb, GRPQUOTA);
647 if (ret)
648 return ret;
649 break;
650 case Opt_offprjjquota:
651 ret = f2fs_clear_qf_name(sb, PRJQUOTA);
652 if (ret)
653 return ret;
654 break;
655 case Opt_jqfmt_vfsold:
656 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
657 break;
658 case Opt_jqfmt_vfsv0:
659 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
660 break;
661 case Opt_jqfmt_vfsv1:
662 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
663 break;
664 case Opt_noquota:
665 clear_opt(sbi, QUOTA);
666 clear_opt(sbi, USRQUOTA);
667 clear_opt(sbi, GRPQUOTA);
668 clear_opt(sbi, PRJQUOTA);
669 break;
670 #else
671 case Opt_quota:
672 case Opt_usrquota:
673 case Opt_grpquota:
674 case Opt_prjquota:
675 case Opt_usrjquota:
676 case Opt_grpjquota:
677 case Opt_prjjquota:
678 case Opt_offusrjquota:
679 case Opt_offgrpjquota:
680 case Opt_offprjjquota:
681 case Opt_jqfmt_vfsold:
682 case Opt_jqfmt_vfsv0:
683 case Opt_jqfmt_vfsv1:
684 case Opt_noquota:
685 f2fs_info(sbi, "quota operations not supported");
686 break;
687 #endif
688 case Opt_whint:
689 name = match_strdup(&args[0]);
690 if (!name)
691 return -ENOMEM;
692 if (strlen(name) == 10 &&
693 !strncmp(name, "user-based", 10)) {
694 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
695 } else if (strlen(name) == 3 &&
696 !strncmp(name, "off", 3)) {
697 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
698 } else if (strlen(name) == 8 &&
699 !strncmp(name, "fs-based", 8)) {
700 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
701 } else {
702 kvfree(name);
703 return -EINVAL;
704 }
705 kvfree(name);
706 break;
707 case Opt_alloc:
708 name = match_strdup(&args[0]);
709 if (!name)
710 return -ENOMEM;
711
712 if (strlen(name) == 7 &&
713 !strncmp(name, "default", 7)) {
714 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
715 } else if (strlen(name) == 5 &&
716 !strncmp(name, "reuse", 5)) {
717 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
718 } else {
719 kvfree(name);
720 return -EINVAL;
721 }
722 kvfree(name);
723 break;
724 case Opt_fsync:
725 name = match_strdup(&args[0]);
726 if (!name)
727 return -ENOMEM;
728 if (strlen(name) == 5 &&
729 !strncmp(name, "posix", 5)) {
730 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
731 } else if (strlen(name) == 6 &&
732 !strncmp(name, "strict", 6)) {
733 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
734 } else if (strlen(name) == 9 &&
735 !strncmp(name, "nobarrier", 9)) {
736 F2FS_OPTION(sbi).fsync_mode =
737 FSYNC_MODE_NOBARRIER;
738 } else {
739 kvfree(name);
740 return -EINVAL;
741 }
742 kvfree(name);
743 break;
744 case Opt_test_dummy_encryption:
745 #ifdef CONFIG_FS_ENCRYPTION
746 if (!f2fs_sb_has_encrypt(sbi)) {
747 f2fs_err(sbi, "Encrypt feature is off");
748 return -EINVAL;
749 }
750
751 F2FS_OPTION(sbi).test_dummy_encryption = true;
752 f2fs_info(sbi, "Test dummy encryption mode enabled");
753 #else
754 f2fs_info(sbi, "Test dummy encryption mount option ignored");
755 #endif
756 break;
757 case Opt_checkpoint_disable_cap_perc:
758 if (args->from && match_int(args, &arg))
759 return -EINVAL;
760 if (arg < 0 || arg > 100)
761 return -EINVAL;
762 if (arg == 100)
763 F2FS_OPTION(sbi).unusable_cap =
764 sbi->user_block_count;
765 else
766 F2FS_OPTION(sbi).unusable_cap =
767 (sbi->user_block_count / 100) * arg;
768 set_opt(sbi, DISABLE_CHECKPOINT);
769 break;
770 case Opt_checkpoint_disable_cap:
771 if (args->from && match_int(args, &arg))
772 return -EINVAL;
773 F2FS_OPTION(sbi).unusable_cap = arg;
774 set_opt(sbi, DISABLE_CHECKPOINT);
775 break;
776 case Opt_checkpoint_disable:
777 set_opt(sbi, DISABLE_CHECKPOINT);
778 break;
779 case Opt_checkpoint_enable:
780 clear_opt(sbi, DISABLE_CHECKPOINT);
781 break;
782 default:
783 f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
784 p);
785 return -EINVAL;
786 }
787 }
788 #ifdef CONFIG_QUOTA
789 if (f2fs_check_quota_options(sbi))
790 return -EINVAL;
791 #else
792 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
793 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
794 return -EINVAL;
795 }
796 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
797 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
798 return -EINVAL;
799 }
800 #endif
801
802 if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
803 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
804 F2FS_IO_SIZE_KB(sbi));
805 return -EINVAL;
806 }
807
808 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
809 int min_size, max_size;
810
811 if (!f2fs_sb_has_extra_attr(sbi) ||
812 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
813 f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
814 return -EINVAL;
815 }
816 if (!test_opt(sbi, INLINE_XATTR)) {
817 f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
818 return -EINVAL;
819 }
820
821 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
822 max_size = MAX_INLINE_XATTR_SIZE;
823
824 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
825 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
826 f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
827 min_size, max_size);
828 return -EINVAL;
829 }
830 }
831
832 if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
833 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
834 return -EINVAL;
835 }
836
837 /* Not pass down write hints if the number of active logs is lesser
838 * than NR_CURSEG_TYPE.
839 */
840 if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
841 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
842 return 0;
843 }
844
845 static struct inode *f2fs_alloc_inode(struct super_block *sb)
846 {
847 struct f2fs_inode_info *fi;
848
849 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
850 if (!fi)
851 return NULL;
852
853 init_once((void *) fi);
854
855 /* Initialize f2fs-specific inode info */
856 atomic_set(&fi->dirty_pages, 0);
857 init_rwsem(&fi->i_sem);
858 INIT_LIST_HEAD(&fi->dirty_list);
859 INIT_LIST_HEAD(&fi->gdirty_list);
860 INIT_LIST_HEAD(&fi->inmem_ilist);
861 INIT_LIST_HEAD(&fi->inmem_pages);
862 mutex_init(&fi->inmem_lock);
863 init_rwsem(&fi->i_gc_rwsem[READ]);
864 init_rwsem(&fi->i_gc_rwsem[WRITE]);
865 init_rwsem(&fi->i_mmap_sem);
866 init_rwsem(&fi->i_xattr_sem);
867
868 /* Will be used by directory only */
869 fi->i_dir_level = F2FS_SB(sb)->dir_level;
870
871 return &fi->vfs_inode;
872 }
873
874 static int f2fs_drop_inode(struct inode *inode)
875 {
876 int ret;
877 /*
878 * This is to avoid a deadlock condition like below.
879 * writeback_single_inode(inode)
880 * - f2fs_write_data_page
881 * - f2fs_gc -> iput -> evict
882 * - inode_wait_for_writeback(inode)
883 */
884 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
885 if (!inode->i_nlink && !is_bad_inode(inode)) {
886 /* to avoid evict_inode call simultaneously */
887 atomic_inc(&inode->i_count);
888 spin_unlock(&inode->i_lock);
889
890 /* some remained atomic pages should discarded */
891 if (f2fs_is_atomic_file(inode))
892 f2fs_drop_inmem_pages(inode);
893
894 /* should remain fi->extent_tree for writepage */
895 f2fs_destroy_extent_node(inode);
896
897 sb_start_intwrite(inode->i_sb);
898 f2fs_i_size_write(inode, 0);
899
900 f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
901 inode, NULL, 0, DATA);
902 truncate_inode_pages_final(inode->i_mapping);
903
904 if (F2FS_HAS_BLOCKS(inode))
905 f2fs_truncate(inode);
906
907 sb_end_intwrite(inode->i_sb);
908
909 spin_lock(&inode->i_lock);
910 atomic_dec(&inode->i_count);
911 }
912 trace_f2fs_drop_inode(inode, 0);
913 return 0;
914 }
915 ret = generic_drop_inode(inode);
916 trace_f2fs_drop_inode(inode, ret);
917 return ret;
918 }
919
920 int f2fs_inode_dirtied(struct inode *inode, bool sync)
921 {
922 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
923 int ret = 0;
924
925 spin_lock(&sbi->inode_lock[DIRTY_META]);
926 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
927 ret = 1;
928 } else {
929 set_inode_flag(inode, FI_DIRTY_INODE);
930 stat_inc_dirty_inode(sbi, DIRTY_META);
931 }
932 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
933 list_add_tail(&F2FS_I(inode)->gdirty_list,
934 &sbi->inode_list[DIRTY_META]);
935 inc_page_count(sbi, F2FS_DIRTY_IMETA);
936 }
937 spin_unlock(&sbi->inode_lock[DIRTY_META]);
938 return ret;
939 }
940
941 void f2fs_inode_synced(struct inode *inode)
942 {
943 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
944
945 spin_lock(&sbi->inode_lock[DIRTY_META]);
946 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
947 spin_unlock(&sbi->inode_lock[DIRTY_META]);
948 return;
949 }
950 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
951 list_del_init(&F2FS_I(inode)->gdirty_list);
952 dec_page_count(sbi, F2FS_DIRTY_IMETA);
953 }
954 clear_inode_flag(inode, FI_DIRTY_INODE);
955 clear_inode_flag(inode, FI_AUTO_RECOVER);
956 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
957 spin_unlock(&sbi->inode_lock[DIRTY_META]);
958 }
959
960 /*
961 * f2fs_dirty_inode() is called from __mark_inode_dirty()
962 *
963 * We should call set_dirty_inode to write the dirty inode through write_inode.
964 */
965 static void f2fs_dirty_inode(struct inode *inode, int flags)
966 {
967 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
968
969 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
970 inode->i_ino == F2FS_META_INO(sbi))
971 return;
972
973 if (flags == I_DIRTY_TIME)
974 return;
975
976 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
977 clear_inode_flag(inode, FI_AUTO_RECOVER);
978
979 f2fs_inode_dirtied(inode, false);
980 }
981
982 static void f2fs_free_inode(struct inode *inode)
983 {
984 fscrypt_free_inode(inode);
985 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
986 }
987
988 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
989 {
990 percpu_counter_destroy(&sbi->alloc_valid_block_count);
991 percpu_counter_destroy(&sbi->total_valid_inode_count);
992 }
993
994 static void destroy_device_list(struct f2fs_sb_info *sbi)
995 {
996 int i;
997
998 for (i = 0; i < sbi->s_ndevs; i++) {
999 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1000 #ifdef CONFIG_BLK_DEV_ZONED
1001 kvfree(FDEV(i).blkz_seq);
1002 #endif
1003 }
1004 kvfree(sbi->devs);
1005 }
1006
1007 static void f2fs_put_super(struct super_block *sb)
1008 {
1009 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1010 int i;
1011 bool dropped;
1012
1013 f2fs_quota_off_umount(sb);
1014
1015 /* prevent remaining shrinker jobs */
1016 mutex_lock(&sbi->umount_mutex);
1017
1018 /*
1019 * We don't need to do checkpoint when superblock is clean.
1020 * But, the previous checkpoint was not done by umount, it needs to do
1021 * clean checkpoint again.
1022 */
1023 if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1024 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1025 struct cp_control cpc = {
1026 .reason = CP_UMOUNT,
1027 };
1028 f2fs_write_checkpoint(sbi, &cpc);
1029 }
1030
1031 /* be sure to wait for any on-going discard commands */
1032 dropped = f2fs_issue_discard_timeout(sbi);
1033
1034 if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1035 !sbi->discard_blks && !dropped) {
1036 struct cp_control cpc = {
1037 .reason = CP_UMOUNT | CP_TRIMMED,
1038 };
1039 f2fs_write_checkpoint(sbi, &cpc);
1040 }
1041
1042 /*
1043 * normally superblock is clean, so we need to release this.
1044 * In addition, EIO will skip do checkpoint, we need this as well.
1045 */
1046 f2fs_release_ino_entry(sbi, true);
1047
1048 f2fs_leave_shrinker(sbi);
1049 mutex_unlock(&sbi->umount_mutex);
1050
1051 /* our cp_error case, we can wait for any writeback page */
1052 f2fs_flush_merged_writes(sbi);
1053
1054 f2fs_wait_on_all_pages_writeback(sbi);
1055
1056 f2fs_bug_on(sbi, sbi->fsync_node_num);
1057
1058 iput(sbi->node_inode);
1059 sbi->node_inode = NULL;
1060
1061 iput(sbi->meta_inode);
1062 sbi->meta_inode = NULL;
1063
1064 /*
1065 * iput() can update stat information, if f2fs_write_checkpoint()
1066 * above failed with error.
1067 */
1068 f2fs_destroy_stats(sbi);
1069
1070 /* destroy f2fs internal modules */
1071 f2fs_destroy_node_manager(sbi);
1072 f2fs_destroy_segment_manager(sbi);
1073
1074 kvfree(sbi->ckpt);
1075
1076 f2fs_unregister_sysfs(sbi);
1077
1078 sb->s_fs_info = NULL;
1079 if (sbi->s_chksum_driver)
1080 crypto_free_shash(sbi->s_chksum_driver);
1081 kvfree(sbi->raw_super);
1082
1083 destroy_device_list(sbi);
1084 mempool_destroy(sbi->write_io_dummy);
1085 #ifdef CONFIG_QUOTA
1086 for (i = 0; i < MAXQUOTAS; i++)
1087 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1088 #endif
1089 destroy_percpu_info(sbi);
1090 for (i = 0; i < NR_PAGE_TYPE; i++)
1091 kvfree(sbi->write_io[i]);
1092 kvfree(sbi);
1093 }
1094
1095 int f2fs_sync_fs(struct super_block *sb, int sync)
1096 {
1097 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1098 int err = 0;
1099
1100 if (unlikely(f2fs_cp_error(sbi)))
1101 return 0;
1102 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1103 return 0;
1104
1105 trace_f2fs_sync_fs(sb, sync);
1106
1107 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1108 return -EAGAIN;
1109
1110 if (sync) {
1111 struct cp_control cpc;
1112
1113 cpc.reason = __get_cp_reason(sbi);
1114
1115 mutex_lock(&sbi->gc_mutex);
1116 err = f2fs_write_checkpoint(sbi, &cpc);
1117 mutex_unlock(&sbi->gc_mutex);
1118 }
1119 f2fs_trace_ios(NULL, 1);
1120
1121 return err;
1122 }
1123
1124 static int f2fs_freeze(struct super_block *sb)
1125 {
1126 if (f2fs_readonly(sb))
1127 return 0;
1128
1129 /* IO error happened before */
1130 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1131 return -EIO;
1132
1133 /* must be clean, since sync_filesystem() was already called */
1134 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1135 return -EINVAL;
1136 return 0;
1137 }
1138
1139 static int f2fs_unfreeze(struct super_block *sb)
1140 {
1141 return 0;
1142 }
1143
1144 #ifdef CONFIG_QUOTA
1145 static int f2fs_statfs_project(struct super_block *sb,
1146 kprojid_t projid, struct kstatfs *buf)
1147 {
1148 struct kqid qid;
1149 struct dquot *dquot;
1150 u64 limit;
1151 u64 curblock;
1152
1153 qid = make_kqid_projid(projid);
1154 dquot = dqget(sb, qid);
1155 if (IS_ERR(dquot))
1156 return PTR_ERR(dquot);
1157 spin_lock(&dquot->dq_dqb_lock);
1158
1159 limit = (dquot->dq_dqb.dqb_bsoftlimit ?
1160 dquot->dq_dqb.dqb_bsoftlimit :
1161 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
1162 if (limit && buf->f_blocks > limit) {
1163 curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
1164 buf->f_blocks = limit;
1165 buf->f_bfree = buf->f_bavail =
1166 (buf->f_blocks > curblock) ?
1167 (buf->f_blocks - curblock) : 0;
1168 }
1169
1170 limit = dquot->dq_dqb.dqb_isoftlimit ?
1171 dquot->dq_dqb.dqb_isoftlimit :
1172 dquot->dq_dqb.dqb_ihardlimit;
1173 if (limit && buf->f_files > limit) {
1174 buf->f_files = limit;
1175 buf->f_ffree =
1176 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1177 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1178 }
1179
1180 spin_unlock(&dquot->dq_dqb_lock);
1181 dqput(dquot);
1182 return 0;
1183 }
1184 #endif
1185
1186 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1187 {
1188 struct super_block *sb = dentry->d_sb;
1189 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1190 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1191 block_t total_count, user_block_count, start_count;
1192 u64 avail_node_count;
1193
1194 total_count = le64_to_cpu(sbi->raw_super->block_count);
1195 user_block_count = sbi->user_block_count;
1196 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1197 buf->f_type = F2FS_SUPER_MAGIC;
1198 buf->f_bsize = sbi->blocksize;
1199
1200 buf->f_blocks = total_count - start_count;
1201 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1202 sbi->current_reserved_blocks;
1203
1204 spin_lock(&sbi->stat_lock);
1205 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1206 buf->f_bfree = 0;
1207 else
1208 buf->f_bfree -= sbi->unusable_block_count;
1209 spin_unlock(&sbi->stat_lock);
1210
1211 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1212 buf->f_bavail = buf->f_bfree -
1213 F2FS_OPTION(sbi).root_reserved_blocks;
1214 else
1215 buf->f_bavail = 0;
1216
1217 avail_node_count = sbi->total_node_count - sbi->nquota_files -
1218 F2FS_RESERVED_NODE_NUM;
1219
1220 if (avail_node_count > user_block_count) {
1221 buf->f_files = user_block_count;
1222 buf->f_ffree = buf->f_bavail;
1223 } else {
1224 buf->f_files = avail_node_count;
1225 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1226 buf->f_bavail);
1227 }
1228
1229 buf->f_namelen = F2FS_NAME_LEN;
1230 buf->f_fsid.val[0] = (u32)id;
1231 buf->f_fsid.val[1] = (u32)(id >> 32);
1232
1233 #ifdef CONFIG_QUOTA
1234 if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1235 sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1236 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1237 }
1238 #endif
1239 return 0;
1240 }
1241
1242 static inline void f2fs_show_quota_options(struct seq_file *seq,
1243 struct super_block *sb)
1244 {
1245 #ifdef CONFIG_QUOTA
1246 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1247
1248 if (F2FS_OPTION(sbi).s_jquota_fmt) {
1249 char *fmtname = "";
1250
1251 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1252 case QFMT_VFS_OLD:
1253 fmtname = "vfsold";
1254 break;
1255 case QFMT_VFS_V0:
1256 fmtname = "vfsv0";
1257 break;
1258 case QFMT_VFS_V1:
1259 fmtname = "vfsv1";
1260 break;
1261 }
1262 seq_printf(seq, ",jqfmt=%s", fmtname);
1263 }
1264
1265 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1266 seq_show_option(seq, "usrjquota",
1267 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1268
1269 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1270 seq_show_option(seq, "grpjquota",
1271 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1272
1273 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1274 seq_show_option(seq, "prjjquota",
1275 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1276 #endif
1277 }
1278
1279 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1280 {
1281 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1282
1283 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
1284 if (test_opt(sbi, FORCE_FG_GC))
1285 seq_printf(seq, ",background_gc=%s", "sync");
1286 else
1287 seq_printf(seq, ",background_gc=%s", "on");
1288 } else {
1289 seq_printf(seq, ",background_gc=%s", "off");
1290 }
1291 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1292 seq_puts(seq, ",disable_roll_forward");
1293 if (test_opt(sbi, DISCARD))
1294 seq_puts(seq, ",discard");
1295 else
1296 seq_puts(seq, ",nodiscard");
1297 if (test_opt(sbi, NOHEAP))
1298 seq_puts(seq, ",no_heap");
1299 else
1300 seq_puts(seq, ",heap");
1301 #ifdef CONFIG_F2FS_FS_XATTR
1302 if (test_opt(sbi, XATTR_USER))
1303 seq_puts(seq, ",user_xattr");
1304 else
1305 seq_puts(seq, ",nouser_xattr");
1306 if (test_opt(sbi, INLINE_XATTR))
1307 seq_puts(seq, ",inline_xattr");
1308 else
1309 seq_puts(seq, ",noinline_xattr");
1310 if (test_opt(sbi, INLINE_XATTR_SIZE))
1311 seq_printf(seq, ",inline_xattr_size=%u",
1312 F2FS_OPTION(sbi).inline_xattr_size);
1313 #endif
1314 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1315 if (test_opt(sbi, POSIX_ACL))
1316 seq_puts(seq, ",acl");
1317 else
1318 seq_puts(seq, ",noacl");
1319 #endif
1320 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1321 seq_puts(seq, ",disable_ext_identify");
1322 if (test_opt(sbi, INLINE_DATA))
1323 seq_puts(seq, ",inline_data");
1324 else
1325 seq_puts(seq, ",noinline_data");
1326 if (test_opt(sbi, INLINE_DENTRY))
1327 seq_puts(seq, ",inline_dentry");
1328 else
1329 seq_puts(seq, ",noinline_dentry");
1330 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1331 seq_puts(seq, ",flush_merge");
1332 if (test_opt(sbi, NOBARRIER))
1333 seq_puts(seq, ",nobarrier");
1334 if (test_opt(sbi, FASTBOOT))
1335 seq_puts(seq, ",fastboot");
1336 if (test_opt(sbi, EXTENT_CACHE))
1337 seq_puts(seq, ",extent_cache");
1338 else
1339 seq_puts(seq, ",noextent_cache");
1340 if (test_opt(sbi, DATA_FLUSH))
1341 seq_puts(seq, ",data_flush");
1342
1343 seq_puts(seq, ",mode=");
1344 if (test_opt(sbi, ADAPTIVE))
1345 seq_puts(seq, "adaptive");
1346 else if (test_opt(sbi, LFS))
1347 seq_puts(seq, "lfs");
1348 seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1349 if (test_opt(sbi, RESERVE_ROOT))
1350 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1351 F2FS_OPTION(sbi).root_reserved_blocks,
1352 from_kuid_munged(&init_user_ns,
1353 F2FS_OPTION(sbi).s_resuid),
1354 from_kgid_munged(&init_user_ns,
1355 F2FS_OPTION(sbi).s_resgid));
1356 if (F2FS_IO_SIZE_BITS(sbi))
1357 seq_printf(seq, ",io_bits=%u",
1358 F2FS_OPTION(sbi).write_io_size_bits);
1359 #ifdef CONFIG_F2FS_FAULT_INJECTION
1360 if (test_opt(sbi, FAULT_INJECTION)) {
1361 seq_printf(seq, ",fault_injection=%u",
1362 F2FS_OPTION(sbi).fault_info.inject_rate);
1363 seq_printf(seq, ",fault_type=%u",
1364 F2FS_OPTION(sbi).fault_info.inject_type);
1365 }
1366 #endif
1367 #ifdef CONFIG_QUOTA
1368 if (test_opt(sbi, QUOTA))
1369 seq_puts(seq, ",quota");
1370 if (test_opt(sbi, USRQUOTA))
1371 seq_puts(seq, ",usrquota");
1372 if (test_opt(sbi, GRPQUOTA))
1373 seq_puts(seq, ",grpquota");
1374 if (test_opt(sbi, PRJQUOTA))
1375 seq_puts(seq, ",prjquota");
1376 #endif
1377 f2fs_show_quota_options(seq, sbi->sb);
1378 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1379 seq_printf(seq, ",whint_mode=%s", "user-based");
1380 else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1381 seq_printf(seq, ",whint_mode=%s", "fs-based");
1382 #ifdef CONFIG_FS_ENCRYPTION
1383 if (F2FS_OPTION(sbi).test_dummy_encryption)
1384 seq_puts(seq, ",test_dummy_encryption");
1385 #endif
1386
1387 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1388 seq_printf(seq, ",alloc_mode=%s", "default");
1389 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1390 seq_printf(seq, ",alloc_mode=%s", "reuse");
1391
1392 if (test_opt(sbi, DISABLE_CHECKPOINT))
1393 seq_printf(seq, ",checkpoint=disable:%u",
1394 F2FS_OPTION(sbi).unusable_cap);
1395 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1396 seq_printf(seq, ",fsync_mode=%s", "posix");
1397 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1398 seq_printf(seq, ",fsync_mode=%s", "strict");
1399 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1400 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1401 return 0;
1402 }
1403
1404 static void default_options(struct f2fs_sb_info *sbi)
1405 {
1406 /* init some FS parameters */
1407 F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1408 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1409 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1410 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1411 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1412 F2FS_OPTION(sbi).test_dummy_encryption = false;
1413 F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1414 F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1415
1416 set_opt(sbi, BG_GC);
1417 set_opt(sbi, INLINE_XATTR);
1418 set_opt(sbi, INLINE_DATA);
1419 set_opt(sbi, INLINE_DENTRY);
1420 set_opt(sbi, EXTENT_CACHE);
1421 set_opt(sbi, NOHEAP);
1422 clear_opt(sbi, DISABLE_CHECKPOINT);
1423 F2FS_OPTION(sbi).unusable_cap = 0;
1424 sbi->sb->s_flags |= SB_LAZYTIME;
1425 set_opt(sbi, FLUSH_MERGE);
1426 set_opt(sbi, DISCARD);
1427 if (f2fs_sb_has_blkzoned(sbi))
1428 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1429 else
1430 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
1431
1432 #ifdef CONFIG_F2FS_FS_XATTR
1433 set_opt(sbi, XATTR_USER);
1434 #endif
1435 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1436 set_opt(sbi, POSIX_ACL);
1437 #endif
1438
1439 f2fs_build_fault_attr(sbi, 0, 0);
1440 }
1441
1442 #ifdef CONFIG_QUOTA
1443 static int f2fs_enable_quotas(struct super_block *sb);
1444 #endif
1445
1446 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1447 {
1448 unsigned int s_flags = sbi->sb->s_flags;
1449 struct cp_control cpc;
1450 int err = 0;
1451 int ret;
1452 block_t unusable;
1453
1454 if (s_flags & SB_RDONLY) {
1455 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1456 return -EINVAL;
1457 }
1458 sbi->sb->s_flags |= SB_ACTIVE;
1459
1460 f2fs_update_time(sbi, DISABLE_TIME);
1461
1462 while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1463 mutex_lock(&sbi->gc_mutex);
1464 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1465 if (err == -ENODATA) {
1466 err = 0;
1467 break;
1468 }
1469 if (err && err != -EAGAIN)
1470 break;
1471 }
1472
1473 ret = sync_filesystem(sbi->sb);
1474 if (ret || err) {
1475 err = ret ? ret: err;
1476 goto restore_flag;
1477 }
1478
1479 unusable = f2fs_get_unusable_blocks(sbi);
1480 if (f2fs_disable_cp_again(sbi, unusable)) {
1481 err = -EAGAIN;
1482 goto restore_flag;
1483 }
1484
1485 mutex_lock(&sbi->gc_mutex);
1486 cpc.reason = CP_PAUSE;
1487 set_sbi_flag(sbi, SBI_CP_DISABLED);
1488 err = f2fs_write_checkpoint(sbi, &cpc);
1489 if (err)
1490 goto out_unlock;
1491
1492 spin_lock(&sbi->stat_lock);
1493 sbi->unusable_block_count = unusable;
1494 spin_unlock(&sbi->stat_lock);
1495
1496 out_unlock:
1497 mutex_unlock(&sbi->gc_mutex);
1498 restore_flag:
1499 sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1500 return err;
1501 }
1502
1503 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1504 {
1505 mutex_lock(&sbi->gc_mutex);
1506 f2fs_dirty_to_prefree(sbi);
1507
1508 clear_sbi_flag(sbi, SBI_CP_DISABLED);
1509 set_sbi_flag(sbi, SBI_IS_DIRTY);
1510 mutex_unlock(&sbi->gc_mutex);
1511
1512 f2fs_sync_fs(sbi->sb, 1);
1513 }
1514
1515 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1516 {
1517 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1518 struct f2fs_mount_info org_mount_opt;
1519 unsigned long old_sb_flags;
1520 int err;
1521 bool need_restart_gc = false;
1522 bool need_stop_gc = false;
1523 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1524 bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1525 bool checkpoint_changed;
1526 #ifdef CONFIG_QUOTA
1527 int i, j;
1528 #endif
1529
1530 /*
1531 * Save the old mount options in case we
1532 * need to restore them.
1533 */
1534 org_mount_opt = sbi->mount_opt;
1535 old_sb_flags = sb->s_flags;
1536
1537 #ifdef CONFIG_QUOTA
1538 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1539 for (i = 0; i < MAXQUOTAS; i++) {
1540 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1541 org_mount_opt.s_qf_names[i] =
1542 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1543 GFP_KERNEL);
1544 if (!org_mount_opt.s_qf_names[i]) {
1545 for (j = 0; j < i; j++)
1546 kvfree(org_mount_opt.s_qf_names[j]);
1547 return -ENOMEM;
1548 }
1549 } else {
1550 org_mount_opt.s_qf_names[i] = NULL;
1551 }
1552 }
1553 #endif
1554
1555 /* recover superblocks we couldn't write due to previous RO mount */
1556 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1557 err = f2fs_commit_super(sbi, false);
1558 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1559 err);
1560 if (!err)
1561 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1562 }
1563
1564 default_options(sbi);
1565
1566 /* parse mount options */
1567 err = parse_options(sb, data);
1568 if (err)
1569 goto restore_opts;
1570 checkpoint_changed =
1571 disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1572
1573 /*
1574 * Previous and new state of filesystem is RO,
1575 * so skip checking GC and FLUSH_MERGE conditions.
1576 */
1577 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1578 goto skip;
1579
1580 #ifdef CONFIG_QUOTA
1581 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1582 err = dquot_suspend(sb, -1);
1583 if (err < 0)
1584 goto restore_opts;
1585 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1586 /* dquot_resume needs RW */
1587 sb->s_flags &= ~SB_RDONLY;
1588 if (sb_any_quota_suspended(sb)) {
1589 dquot_resume(sb, -1);
1590 } else if (f2fs_sb_has_quota_ino(sbi)) {
1591 err = f2fs_enable_quotas(sb);
1592 if (err)
1593 goto restore_opts;
1594 }
1595 }
1596 #endif
1597 /* disallow enable/disable extent_cache dynamically */
1598 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1599 err = -EINVAL;
1600 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1601 goto restore_opts;
1602 }
1603
1604 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1605 err = -EINVAL;
1606 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1607 goto restore_opts;
1608 }
1609
1610 /*
1611 * We stop the GC thread if FS is mounted as RO
1612 * or if background_gc = off is passed in mount
1613 * option. Also sync the filesystem.
1614 */
1615 if ((*flags & SB_RDONLY) || !test_opt(sbi, BG_GC)) {
1616 if (sbi->gc_thread) {
1617 f2fs_stop_gc_thread(sbi);
1618 need_restart_gc = true;
1619 }
1620 } else if (!sbi->gc_thread) {
1621 err = f2fs_start_gc_thread(sbi);
1622 if (err)
1623 goto restore_opts;
1624 need_stop_gc = true;
1625 }
1626
1627 if (*flags & SB_RDONLY ||
1628 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1629 writeback_inodes_sb(sb, WB_REASON_SYNC);
1630 sync_inodes_sb(sb);
1631
1632 set_sbi_flag(sbi, SBI_IS_DIRTY);
1633 set_sbi_flag(sbi, SBI_IS_CLOSE);
1634 f2fs_sync_fs(sb, 1);
1635 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1636 }
1637
1638 if (checkpoint_changed) {
1639 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1640 err = f2fs_disable_checkpoint(sbi);
1641 if (err)
1642 goto restore_gc;
1643 } else {
1644 f2fs_enable_checkpoint(sbi);
1645 }
1646 }
1647
1648 /*
1649 * We stop issue flush thread if FS is mounted as RO
1650 * or if flush_merge is not passed in mount option.
1651 */
1652 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1653 clear_opt(sbi, FLUSH_MERGE);
1654 f2fs_destroy_flush_cmd_control(sbi, false);
1655 } else {
1656 err = f2fs_create_flush_cmd_control(sbi);
1657 if (err)
1658 goto restore_gc;
1659 }
1660 skip:
1661 #ifdef CONFIG_QUOTA
1662 /* Release old quota file names */
1663 for (i = 0; i < MAXQUOTAS; i++)
1664 kvfree(org_mount_opt.s_qf_names[i]);
1665 #endif
1666 /* Update the POSIXACL Flag */
1667 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1668 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1669
1670 limit_reserve_root(sbi);
1671 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1672 return 0;
1673 restore_gc:
1674 if (need_restart_gc) {
1675 if (f2fs_start_gc_thread(sbi))
1676 f2fs_warn(sbi, "background gc thread has stopped");
1677 } else if (need_stop_gc) {
1678 f2fs_stop_gc_thread(sbi);
1679 }
1680 restore_opts:
1681 #ifdef CONFIG_QUOTA
1682 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1683 for (i = 0; i < MAXQUOTAS; i++) {
1684 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1685 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1686 }
1687 #endif
1688 sbi->mount_opt = org_mount_opt;
1689 sb->s_flags = old_sb_flags;
1690 return err;
1691 }
1692
1693 #ifdef CONFIG_QUOTA
1694 /* Read data from quotafile */
1695 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1696 size_t len, loff_t off)
1697 {
1698 struct inode *inode = sb_dqopt(sb)->files[type];
1699 struct address_space *mapping = inode->i_mapping;
1700 block_t blkidx = F2FS_BYTES_TO_BLK(off);
1701 int offset = off & (sb->s_blocksize - 1);
1702 int tocopy;
1703 size_t toread;
1704 loff_t i_size = i_size_read(inode);
1705 struct page *page;
1706 char *kaddr;
1707
1708 if (off > i_size)
1709 return 0;
1710
1711 if (off + len > i_size)
1712 len = i_size - off;
1713 toread = len;
1714 while (toread > 0) {
1715 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1716 repeat:
1717 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1718 if (IS_ERR(page)) {
1719 if (PTR_ERR(page) == -ENOMEM) {
1720 congestion_wait(BLK_RW_ASYNC, HZ/50);
1721 goto repeat;
1722 }
1723 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1724 return PTR_ERR(page);
1725 }
1726
1727 lock_page(page);
1728
1729 if (unlikely(page->mapping != mapping)) {
1730 f2fs_put_page(page, 1);
1731 goto repeat;
1732 }
1733 if (unlikely(!PageUptodate(page))) {
1734 f2fs_put_page(page, 1);
1735 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1736 return -EIO;
1737 }
1738
1739 kaddr = kmap_atomic(page);
1740 memcpy(data, kaddr + offset, tocopy);
1741 kunmap_atomic(kaddr);
1742 f2fs_put_page(page, 1);
1743
1744 offset = 0;
1745 toread -= tocopy;
1746 data += tocopy;
1747 blkidx++;
1748 }
1749 return len;
1750 }
1751
1752 /* Write to quotafile */
1753 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
1754 const char *data, size_t len, loff_t off)
1755 {
1756 struct inode *inode = sb_dqopt(sb)->files[type];
1757 struct address_space *mapping = inode->i_mapping;
1758 const struct address_space_operations *a_ops = mapping->a_ops;
1759 int offset = off & (sb->s_blocksize - 1);
1760 size_t towrite = len;
1761 struct page *page;
1762 char *kaddr;
1763 int err = 0;
1764 int tocopy;
1765
1766 while (towrite > 0) {
1767 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
1768 towrite);
1769 retry:
1770 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
1771 &page, NULL);
1772 if (unlikely(err)) {
1773 if (err == -ENOMEM) {
1774 congestion_wait(BLK_RW_ASYNC, HZ/50);
1775 goto retry;
1776 }
1777 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1778 break;
1779 }
1780
1781 kaddr = kmap_atomic(page);
1782 memcpy(kaddr + offset, data, tocopy);
1783 kunmap_atomic(kaddr);
1784 flush_dcache_page(page);
1785
1786 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
1787 page, NULL);
1788 offset = 0;
1789 towrite -= tocopy;
1790 off += tocopy;
1791 data += tocopy;
1792 cond_resched();
1793 }
1794
1795 if (len == towrite)
1796 return err;
1797 inode->i_mtime = inode->i_ctime = current_time(inode);
1798 f2fs_mark_inode_dirty_sync(inode, false);
1799 return len - towrite;
1800 }
1801
1802 static struct dquot **f2fs_get_dquots(struct inode *inode)
1803 {
1804 return F2FS_I(inode)->i_dquot;
1805 }
1806
1807 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
1808 {
1809 return &F2FS_I(inode)->i_reserved_quota;
1810 }
1811
1812 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
1813 {
1814 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
1815 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
1816 return 0;
1817 }
1818
1819 return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
1820 F2FS_OPTION(sbi).s_jquota_fmt, type);
1821 }
1822
1823 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
1824 {
1825 int enabled = 0;
1826 int i, err;
1827
1828 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
1829 err = f2fs_enable_quotas(sbi->sb);
1830 if (err) {
1831 f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
1832 return 0;
1833 }
1834 return 1;
1835 }
1836
1837 for (i = 0; i < MAXQUOTAS; i++) {
1838 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1839 err = f2fs_quota_on_mount(sbi, i);
1840 if (!err) {
1841 enabled = 1;
1842 continue;
1843 }
1844 f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
1845 err, i);
1846 }
1847 }
1848 return enabled;
1849 }
1850
1851 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
1852 unsigned int flags)
1853 {
1854 struct inode *qf_inode;
1855 unsigned long qf_inum;
1856 int err;
1857
1858 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
1859
1860 qf_inum = f2fs_qf_ino(sb, type);
1861 if (!qf_inum)
1862 return -EPERM;
1863
1864 qf_inode = f2fs_iget(sb, qf_inum);
1865 if (IS_ERR(qf_inode)) {
1866 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
1867 return PTR_ERR(qf_inode);
1868 }
1869
1870 /* Don't account quota for quota files to avoid recursion */
1871 qf_inode->i_flags |= S_NOQUOTA;
1872 err = dquot_enable(qf_inode, type, format_id, flags);
1873 iput(qf_inode);
1874 return err;
1875 }
1876
1877 static int f2fs_enable_quotas(struct super_block *sb)
1878 {
1879 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1880 int type, err = 0;
1881 unsigned long qf_inum;
1882 bool quota_mopt[MAXQUOTAS] = {
1883 test_opt(sbi, USRQUOTA),
1884 test_opt(sbi, GRPQUOTA),
1885 test_opt(sbi, PRJQUOTA),
1886 };
1887
1888 if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
1889 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
1890 return 0;
1891 }
1892
1893 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1894
1895 for (type = 0; type < MAXQUOTAS; type++) {
1896 qf_inum = f2fs_qf_ino(sb, type);
1897 if (qf_inum) {
1898 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
1899 DQUOT_USAGE_ENABLED |
1900 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
1901 if (err) {
1902 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
1903 type, err);
1904 for (type--; type >= 0; type--)
1905 dquot_quota_off(sb, type);
1906 set_sbi_flag(F2FS_SB(sb),
1907 SBI_QUOTA_NEED_REPAIR);
1908 return err;
1909 }
1910 }
1911 }
1912 return 0;
1913 }
1914
1915 int f2fs_quota_sync(struct super_block *sb, int type)
1916 {
1917 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1918 struct quota_info *dqopt = sb_dqopt(sb);
1919 int cnt;
1920 int ret;
1921
1922 /*
1923 * do_quotactl
1924 * f2fs_quota_sync
1925 * down_read(quota_sem)
1926 * dquot_writeback_dquots()
1927 * f2fs_dquot_commit
1928 * block_operation
1929 * down_read(quota_sem)
1930 */
1931 f2fs_lock_op(sbi);
1932
1933 down_read(&sbi->quota_sem);
1934 ret = dquot_writeback_dquots(sb, type);
1935 if (ret)
1936 goto out;
1937
1938 /*
1939 * Now when everything is written we can discard the pagecache so
1940 * that userspace sees the changes.
1941 */
1942 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1943 struct address_space *mapping;
1944
1945 if (type != -1 && cnt != type)
1946 continue;
1947 if (!sb_has_quota_active(sb, cnt))
1948 continue;
1949
1950 mapping = dqopt->files[cnt]->i_mapping;
1951
1952 ret = filemap_fdatawrite(mapping);
1953 if (ret)
1954 goto out;
1955
1956 /* if we are using journalled quota */
1957 if (is_journalled_quota(sbi))
1958 continue;
1959
1960 ret = filemap_fdatawait(mapping);
1961 if (ret)
1962 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1963
1964 inode_lock(dqopt->files[cnt]);
1965 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
1966 inode_unlock(dqopt->files[cnt]);
1967 }
1968 out:
1969 if (ret)
1970 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1971 up_read(&sbi->quota_sem);
1972 f2fs_unlock_op(sbi);
1973 return ret;
1974 }
1975
1976 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
1977 const struct path *path)
1978 {
1979 struct inode *inode;
1980 int err;
1981
1982 err = f2fs_quota_sync(sb, type);
1983 if (err)
1984 return err;
1985
1986 err = dquot_quota_on(sb, type, format_id, path);
1987 if (err)
1988 return err;
1989
1990 inode = d_inode(path->dentry);
1991
1992 inode_lock(inode);
1993 F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
1994 f2fs_set_inode_flags(inode);
1995 inode_unlock(inode);
1996 f2fs_mark_inode_dirty_sync(inode, false);
1997
1998 return 0;
1999 }
2000
2001 static int f2fs_quota_off(struct super_block *sb, int type)
2002 {
2003 struct inode *inode = sb_dqopt(sb)->files[type];
2004 int err;
2005
2006 if (!inode || !igrab(inode))
2007 return dquot_quota_off(sb, type);
2008
2009 err = f2fs_quota_sync(sb, type);
2010 if (err)
2011 goto out_put;
2012
2013 err = dquot_quota_off(sb, type);
2014 if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2015 goto out_put;
2016
2017 inode_lock(inode);
2018 F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2019 f2fs_set_inode_flags(inode);
2020 inode_unlock(inode);
2021 f2fs_mark_inode_dirty_sync(inode, false);
2022 out_put:
2023 iput(inode);
2024 return err;
2025 }
2026
2027 void f2fs_quota_off_umount(struct super_block *sb)
2028 {
2029 int type;
2030 int err;
2031
2032 for (type = 0; type < MAXQUOTAS; type++) {
2033 err = f2fs_quota_off(sb, type);
2034 if (err) {
2035 int ret = dquot_quota_off(sb, type);
2036
2037 f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2038 type, err, ret);
2039 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2040 }
2041 }
2042 /*
2043 * In case of checkpoint=disable, we must flush quota blocks.
2044 * This can cause NULL exception for node_inode in end_io, since
2045 * put_super already dropped it.
2046 */
2047 sync_filesystem(sb);
2048 }
2049
2050 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2051 {
2052 struct quota_info *dqopt = sb_dqopt(sb);
2053 int type;
2054
2055 for (type = 0; type < MAXQUOTAS; type++) {
2056 if (!dqopt->files[type])
2057 continue;
2058 f2fs_inode_synced(dqopt->files[type]);
2059 }
2060 }
2061
2062 static int f2fs_dquot_commit(struct dquot *dquot)
2063 {
2064 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2065 int ret;
2066
2067 down_read(&sbi->quota_sem);
2068 ret = dquot_commit(dquot);
2069 if (ret < 0)
2070 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2071 up_read(&sbi->quota_sem);
2072 return ret;
2073 }
2074
2075 static int f2fs_dquot_acquire(struct dquot *dquot)
2076 {
2077 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2078 int ret;
2079
2080 down_read(&sbi->quota_sem);
2081 ret = dquot_acquire(dquot);
2082 if (ret < 0)
2083 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2084 up_read(&sbi->quota_sem);
2085 return ret;
2086 }
2087
2088 static int f2fs_dquot_release(struct dquot *dquot)
2089 {
2090 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2091 int ret;
2092
2093 down_read(&sbi->quota_sem);
2094 ret = dquot_release(dquot);
2095 if (ret < 0)
2096 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2097 up_read(&sbi->quota_sem);
2098 return ret;
2099 }
2100
2101 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2102 {
2103 struct super_block *sb = dquot->dq_sb;
2104 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2105 int ret;
2106
2107 down_read(&sbi->quota_sem);
2108 ret = dquot_mark_dquot_dirty(dquot);
2109
2110 /* if we are using journalled quota */
2111 if (is_journalled_quota(sbi))
2112 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2113
2114 up_read(&sbi->quota_sem);
2115 return ret;
2116 }
2117
2118 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2119 {
2120 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2121 int ret;
2122
2123 down_read(&sbi->quota_sem);
2124 ret = dquot_commit_info(sb, type);
2125 if (ret < 0)
2126 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2127 up_read(&sbi->quota_sem);
2128 return ret;
2129 }
2130
2131 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2132 {
2133 *projid = F2FS_I(inode)->i_projid;
2134 return 0;
2135 }
2136
2137 static const struct dquot_operations f2fs_quota_operations = {
2138 .get_reserved_space = f2fs_get_reserved_space,
2139 .write_dquot = f2fs_dquot_commit,
2140 .acquire_dquot = f2fs_dquot_acquire,
2141 .release_dquot = f2fs_dquot_release,
2142 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
2143 .write_info = f2fs_dquot_commit_info,
2144 .alloc_dquot = dquot_alloc,
2145 .destroy_dquot = dquot_destroy,
2146 .get_projid = f2fs_get_projid,
2147 .get_next_id = dquot_get_next_id,
2148 };
2149
2150 static const struct quotactl_ops f2fs_quotactl_ops = {
2151 .quota_on = f2fs_quota_on,
2152 .quota_off = f2fs_quota_off,
2153 .quota_sync = f2fs_quota_sync,
2154 .get_state = dquot_get_state,
2155 .set_info = dquot_set_dqinfo,
2156 .get_dqblk = dquot_get_dqblk,
2157 .set_dqblk = dquot_set_dqblk,
2158 .get_nextdqblk = dquot_get_next_dqblk,
2159 };
2160 #else
2161 int f2fs_quota_sync(struct super_block *sb, int type)
2162 {
2163 return 0;
2164 }
2165
2166 void f2fs_quota_off_umount(struct super_block *sb)
2167 {
2168 }
2169 #endif
2170
2171 static const struct super_operations f2fs_sops = {
2172 .alloc_inode = f2fs_alloc_inode,
2173 .free_inode = f2fs_free_inode,
2174 .drop_inode = f2fs_drop_inode,
2175 .write_inode = f2fs_write_inode,
2176 .dirty_inode = f2fs_dirty_inode,
2177 .show_options = f2fs_show_options,
2178 #ifdef CONFIG_QUOTA
2179 .quota_read = f2fs_quota_read,
2180 .quota_write = f2fs_quota_write,
2181 .get_dquots = f2fs_get_dquots,
2182 #endif
2183 .evict_inode = f2fs_evict_inode,
2184 .put_super = f2fs_put_super,
2185 .sync_fs = f2fs_sync_fs,
2186 .freeze_fs = f2fs_freeze,
2187 .unfreeze_fs = f2fs_unfreeze,
2188 .statfs = f2fs_statfs,
2189 .remount_fs = f2fs_remount,
2190 };
2191
2192 #ifdef CONFIG_FS_ENCRYPTION
2193 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2194 {
2195 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2196 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2197 ctx, len, NULL);
2198 }
2199
2200 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2201 void *fs_data)
2202 {
2203 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2204
2205 /*
2206 * Encrypting the root directory is not allowed because fsck
2207 * expects lost+found directory to exist and remain unencrypted
2208 * if LOST_FOUND feature is enabled.
2209 *
2210 */
2211 if (f2fs_sb_has_lost_found(sbi) &&
2212 inode->i_ino == F2FS_ROOT_INO(sbi))
2213 return -EPERM;
2214
2215 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2216 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2217 ctx, len, fs_data, XATTR_CREATE);
2218 }
2219
2220 static bool f2fs_dummy_context(struct inode *inode)
2221 {
2222 return DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(inode));
2223 }
2224
2225 static const struct fscrypt_operations f2fs_cryptops = {
2226 .key_prefix = "f2fs:",
2227 .get_context = f2fs_get_context,
2228 .set_context = f2fs_set_context,
2229 .dummy_context = f2fs_dummy_context,
2230 .empty_dir = f2fs_empty_dir,
2231 .max_namelen = F2FS_NAME_LEN,
2232 };
2233 #endif
2234
2235 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2236 u64 ino, u32 generation)
2237 {
2238 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2239 struct inode *inode;
2240
2241 if (f2fs_check_nid_range(sbi, ino))
2242 return ERR_PTR(-ESTALE);
2243
2244 /*
2245 * f2fs_iget isn't quite right if the inode is currently unallocated!
2246 * However f2fs_iget currently does appropriate checks to handle stale
2247 * inodes so everything is OK.
2248 */
2249 inode = f2fs_iget(sb, ino);
2250 if (IS_ERR(inode))
2251 return ERR_CAST(inode);
2252 if (unlikely(generation && inode->i_generation != generation)) {
2253 /* we didn't find the right inode.. */
2254 iput(inode);
2255 return ERR_PTR(-ESTALE);
2256 }
2257 return inode;
2258 }
2259
2260 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2261 int fh_len, int fh_type)
2262 {
2263 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2264 f2fs_nfs_get_inode);
2265 }
2266
2267 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2268 int fh_len, int fh_type)
2269 {
2270 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2271 f2fs_nfs_get_inode);
2272 }
2273
2274 static const struct export_operations f2fs_export_ops = {
2275 .fh_to_dentry = f2fs_fh_to_dentry,
2276 .fh_to_parent = f2fs_fh_to_parent,
2277 .get_parent = f2fs_get_parent,
2278 };
2279
2280 static loff_t max_file_blocks(void)
2281 {
2282 loff_t result = 0;
2283 loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2284
2285 /*
2286 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2287 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2288 * space in inode.i_addr, it will be more safe to reassign
2289 * result as zero.
2290 */
2291
2292 /* two direct node blocks */
2293 result += (leaf_count * 2);
2294
2295 /* two indirect node blocks */
2296 leaf_count *= NIDS_PER_BLOCK;
2297 result += (leaf_count * 2);
2298
2299 /* one double indirect node block */
2300 leaf_count *= NIDS_PER_BLOCK;
2301 result += leaf_count;
2302
2303 return result;
2304 }
2305
2306 static int __f2fs_commit_super(struct buffer_head *bh,
2307 struct f2fs_super_block *super)
2308 {
2309 lock_buffer(bh);
2310 if (super)
2311 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2312 set_buffer_dirty(bh);
2313 unlock_buffer(bh);
2314
2315 /* it's rare case, we can do fua all the time */
2316 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2317 }
2318
2319 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2320 struct buffer_head *bh)
2321 {
2322 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2323 (bh->b_data + F2FS_SUPER_OFFSET);
2324 struct super_block *sb = sbi->sb;
2325 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2326 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2327 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2328 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2329 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2330 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2331 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2332 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2333 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2334 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2335 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2336 u32 segment_count = le32_to_cpu(raw_super->segment_count);
2337 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2338 u64 main_end_blkaddr = main_blkaddr +
2339 (segment_count_main << log_blocks_per_seg);
2340 u64 seg_end_blkaddr = segment0_blkaddr +
2341 (segment_count << log_blocks_per_seg);
2342
2343 if (segment0_blkaddr != cp_blkaddr) {
2344 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2345 segment0_blkaddr, cp_blkaddr);
2346 return true;
2347 }
2348
2349 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2350 sit_blkaddr) {
2351 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2352 cp_blkaddr, sit_blkaddr,
2353 segment_count_ckpt << log_blocks_per_seg);
2354 return true;
2355 }
2356
2357 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2358 nat_blkaddr) {
2359 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2360 sit_blkaddr, nat_blkaddr,
2361 segment_count_sit << log_blocks_per_seg);
2362 return true;
2363 }
2364
2365 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2366 ssa_blkaddr) {
2367 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2368 nat_blkaddr, ssa_blkaddr,
2369 segment_count_nat << log_blocks_per_seg);
2370 return true;
2371 }
2372
2373 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2374 main_blkaddr) {
2375 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2376 ssa_blkaddr, main_blkaddr,
2377 segment_count_ssa << log_blocks_per_seg);
2378 return true;
2379 }
2380
2381 if (main_end_blkaddr > seg_end_blkaddr) {
2382 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
2383 main_blkaddr,
2384 segment0_blkaddr +
2385 (segment_count << log_blocks_per_seg),
2386 segment_count_main << log_blocks_per_seg);
2387 return true;
2388 } else if (main_end_blkaddr < seg_end_blkaddr) {
2389 int err = 0;
2390 char *res;
2391
2392 /* fix in-memory information all the time */
2393 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2394 segment0_blkaddr) >> log_blocks_per_seg);
2395
2396 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2397 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2398 res = "internally";
2399 } else {
2400 err = __f2fs_commit_super(bh, NULL);
2401 res = err ? "failed" : "done";
2402 }
2403 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
2404 res, main_blkaddr,
2405 segment0_blkaddr +
2406 (segment_count << log_blocks_per_seg),
2407 segment_count_main << log_blocks_per_seg);
2408 if (err)
2409 return true;
2410 }
2411 return false;
2412 }
2413
2414 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2415 struct buffer_head *bh)
2416 {
2417 block_t segment_count, segs_per_sec, secs_per_zone;
2418 block_t total_sections, blocks_per_seg;
2419 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2420 (bh->b_data + F2FS_SUPER_OFFSET);
2421 unsigned int blocksize;
2422 size_t crc_offset = 0;
2423 __u32 crc = 0;
2424
2425 if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2426 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2427 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2428 return -EINVAL;
2429 }
2430
2431 /* Check checksum_offset and crc in superblock */
2432 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2433 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2434 if (crc_offset !=
2435 offsetof(struct f2fs_super_block, crc)) {
2436 f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2437 crc_offset);
2438 return -EFSCORRUPTED;
2439 }
2440 crc = le32_to_cpu(raw_super->crc);
2441 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2442 f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2443 return -EFSCORRUPTED;
2444 }
2445 }
2446
2447 /* Currently, support only 4KB page cache size */
2448 if (F2FS_BLKSIZE != PAGE_SIZE) {
2449 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2450 PAGE_SIZE);
2451 return -EFSCORRUPTED;
2452 }
2453
2454 /* Currently, support only 4KB block size */
2455 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2456 if (blocksize != F2FS_BLKSIZE) {
2457 f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
2458 blocksize);
2459 return -EFSCORRUPTED;
2460 }
2461
2462 /* check log blocks per segment */
2463 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2464 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2465 le32_to_cpu(raw_super->log_blocks_per_seg));
2466 return -EFSCORRUPTED;
2467 }
2468
2469 /* Currently, support 512/1024/2048/4096 bytes sector size */
2470 if (le32_to_cpu(raw_super->log_sectorsize) >
2471 F2FS_MAX_LOG_SECTOR_SIZE ||
2472 le32_to_cpu(raw_super->log_sectorsize) <
2473 F2FS_MIN_LOG_SECTOR_SIZE) {
2474 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2475 le32_to_cpu(raw_super->log_sectorsize));
2476 return -EFSCORRUPTED;
2477 }
2478 if (le32_to_cpu(raw_super->log_sectors_per_block) +
2479 le32_to_cpu(raw_super->log_sectorsize) !=
2480 F2FS_MAX_LOG_SECTOR_SIZE) {
2481 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2482 le32_to_cpu(raw_super->log_sectors_per_block),
2483 le32_to_cpu(raw_super->log_sectorsize));
2484 return -EFSCORRUPTED;
2485 }
2486
2487 segment_count = le32_to_cpu(raw_super->segment_count);
2488 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2489 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2490 total_sections = le32_to_cpu(raw_super->section_count);
2491
2492 /* blocks_per_seg should be 512, given the above check */
2493 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2494
2495 if (segment_count > F2FS_MAX_SEGMENT ||
2496 segment_count < F2FS_MIN_SEGMENTS) {
2497 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2498 return -EFSCORRUPTED;
2499 }
2500
2501 if (total_sections > segment_count ||
2502 total_sections < F2FS_MIN_SEGMENTS ||
2503 segs_per_sec > segment_count || !segs_per_sec) {
2504 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2505 segment_count, total_sections, segs_per_sec);
2506 return -EFSCORRUPTED;
2507 }
2508
2509 if ((segment_count / segs_per_sec) < total_sections) {
2510 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2511 segment_count, segs_per_sec, total_sections);
2512 return -EFSCORRUPTED;
2513 }
2514
2515 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2516 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2517 segment_count, le64_to_cpu(raw_super->block_count));
2518 return -EFSCORRUPTED;
2519 }
2520
2521 if (secs_per_zone > total_sections || !secs_per_zone) {
2522 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2523 secs_per_zone, total_sections);
2524 return -EFSCORRUPTED;
2525 }
2526 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2527 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2528 (le32_to_cpu(raw_super->extension_count) +
2529 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2530 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2531 le32_to_cpu(raw_super->extension_count),
2532 raw_super->hot_ext_count,
2533 F2FS_MAX_EXTENSION);
2534 return -EFSCORRUPTED;
2535 }
2536
2537 if (le32_to_cpu(raw_super->cp_payload) >
2538 (blocks_per_seg - F2FS_CP_PACKS)) {
2539 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2540 le32_to_cpu(raw_super->cp_payload),
2541 blocks_per_seg - F2FS_CP_PACKS);
2542 return -EFSCORRUPTED;
2543 }
2544
2545 /* check reserved ino info */
2546 if (le32_to_cpu(raw_super->node_ino) != 1 ||
2547 le32_to_cpu(raw_super->meta_ino) != 2 ||
2548 le32_to_cpu(raw_super->root_ino) != 3) {
2549 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2550 le32_to_cpu(raw_super->node_ino),
2551 le32_to_cpu(raw_super->meta_ino),
2552 le32_to_cpu(raw_super->root_ino));
2553 return -EFSCORRUPTED;
2554 }
2555
2556 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2557 if (sanity_check_area_boundary(sbi, bh))
2558 return -EFSCORRUPTED;
2559
2560 return 0;
2561 }
2562
2563 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2564 {
2565 unsigned int total, fsmeta;
2566 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2567 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2568 unsigned int ovp_segments, reserved_segments;
2569 unsigned int main_segs, blocks_per_seg;
2570 unsigned int sit_segs, nat_segs;
2571 unsigned int sit_bitmap_size, nat_bitmap_size;
2572 unsigned int log_blocks_per_seg;
2573 unsigned int segment_count_main;
2574 unsigned int cp_pack_start_sum, cp_payload;
2575 block_t user_block_count, valid_user_blocks;
2576 block_t avail_node_count, valid_node_count;
2577 int i, j;
2578
2579 total = le32_to_cpu(raw_super->segment_count);
2580 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2581 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2582 fsmeta += sit_segs;
2583 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2584 fsmeta += nat_segs;
2585 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2586 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2587
2588 if (unlikely(fsmeta >= total))
2589 return 1;
2590
2591 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2592 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2593
2594 if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2595 ovp_segments == 0 || reserved_segments == 0)) {
2596 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2597 return 1;
2598 }
2599
2600 user_block_count = le64_to_cpu(ckpt->user_block_count);
2601 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2602 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2603 if (!user_block_count || user_block_count >=
2604 segment_count_main << log_blocks_per_seg) {
2605 f2fs_err(sbi, "Wrong user_block_count: %u",
2606 user_block_count);
2607 return 1;
2608 }
2609
2610 valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2611 if (valid_user_blocks > user_block_count) {
2612 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2613 valid_user_blocks, user_block_count);
2614 return 1;
2615 }
2616
2617 valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2618 avail_node_count = sbi->total_node_count - sbi->nquota_files -
2619 F2FS_RESERVED_NODE_NUM;
2620 if (valid_node_count > avail_node_count) {
2621 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2622 valid_node_count, avail_node_count);
2623 return 1;
2624 }
2625
2626 main_segs = le32_to_cpu(raw_super->segment_count_main);
2627 blocks_per_seg = sbi->blocks_per_seg;
2628
2629 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2630 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2631 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2632 return 1;
2633 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2634 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2635 le32_to_cpu(ckpt->cur_node_segno[j])) {
2636 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
2637 i, j,
2638 le32_to_cpu(ckpt->cur_node_segno[i]));
2639 return 1;
2640 }
2641 }
2642 }
2643 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2644 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2645 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2646 return 1;
2647 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2648 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2649 le32_to_cpu(ckpt->cur_data_segno[j])) {
2650 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
2651 i, j,
2652 le32_to_cpu(ckpt->cur_data_segno[i]));
2653 return 1;
2654 }
2655 }
2656 }
2657 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2658 for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
2659 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2660 le32_to_cpu(ckpt->cur_data_segno[j])) {
2661 f2fs_err(sbi, "Data segment (%u) and Data segment (%u) has the same segno: %u",
2662 i, j,
2663 le32_to_cpu(ckpt->cur_node_segno[i]));
2664 return 1;
2665 }
2666 }
2667 }
2668
2669 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2670 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2671
2672 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2673 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2674 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
2675 sit_bitmap_size, nat_bitmap_size);
2676 return 1;
2677 }
2678
2679 cp_pack_start_sum = __start_sum_addr(sbi);
2680 cp_payload = __cp_payload(sbi);
2681 if (cp_pack_start_sum < cp_payload + 1 ||
2682 cp_pack_start_sum > blocks_per_seg - 1 -
2683 NR_CURSEG_TYPE) {
2684 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
2685 cp_pack_start_sum);
2686 return 1;
2687 }
2688
2689 if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
2690 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
2691 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
2692 "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
2693 "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
2694 le32_to_cpu(ckpt->checksum_offset));
2695 return 1;
2696 }
2697
2698 if (unlikely(f2fs_cp_error(sbi))) {
2699 f2fs_err(sbi, "A bug case: need to run fsck");
2700 return 1;
2701 }
2702 return 0;
2703 }
2704
2705 static void init_sb_info(struct f2fs_sb_info *sbi)
2706 {
2707 struct f2fs_super_block *raw_super = sbi->raw_super;
2708 int i;
2709
2710 sbi->log_sectors_per_block =
2711 le32_to_cpu(raw_super->log_sectors_per_block);
2712 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
2713 sbi->blocksize = 1 << sbi->log_blocksize;
2714 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2715 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
2716 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2717 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2718 sbi->total_sections = le32_to_cpu(raw_super->section_count);
2719 sbi->total_node_count =
2720 (le32_to_cpu(raw_super->segment_count_nat) / 2)
2721 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
2722 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
2723 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
2724 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
2725 sbi->cur_victim_sec = NULL_SECNO;
2726 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
2727 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
2728 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
2729 sbi->migration_granularity = sbi->segs_per_sec;
2730
2731 sbi->dir_level = DEF_DIR_LEVEL;
2732 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
2733 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
2734 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
2735 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
2736 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
2737 sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
2738 DEF_UMOUNT_DISCARD_TIMEOUT;
2739 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2740
2741 for (i = 0; i < NR_COUNT_TYPE; i++)
2742 atomic_set(&sbi->nr_pages[i], 0);
2743
2744 for (i = 0; i < META; i++)
2745 atomic_set(&sbi->wb_sync_req[i], 0);
2746
2747 INIT_LIST_HEAD(&sbi->s_list);
2748 mutex_init(&sbi->umount_mutex);
2749 init_rwsem(&sbi->io_order_lock);
2750 spin_lock_init(&sbi->cp_lock);
2751
2752 sbi->dirty_device = 0;
2753 spin_lock_init(&sbi->dev_lock);
2754
2755 init_rwsem(&sbi->sb_lock);
2756 }
2757
2758 static int init_percpu_info(struct f2fs_sb_info *sbi)
2759 {
2760 int err;
2761
2762 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
2763 if (err)
2764 return err;
2765
2766 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
2767 GFP_KERNEL);
2768 if (err)
2769 percpu_counter_destroy(&sbi->alloc_valid_block_count);
2770
2771 return err;
2772 }
2773
2774 #ifdef CONFIG_BLK_DEV_ZONED
2775 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
2776 {
2777 struct block_device *bdev = FDEV(devi).bdev;
2778 sector_t nr_sectors = bdev->bd_part->nr_sects;
2779 sector_t sector = 0;
2780 struct blk_zone *zones;
2781 unsigned int i, nr_zones;
2782 unsigned int n = 0;
2783 int err = -EIO;
2784
2785 if (!f2fs_sb_has_blkzoned(sbi))
2786 return 0;
2787
2788 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
2789 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
2790 return -EINVAL;
2791 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
2792 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
2793 __ilog2_u32(sbi->blocks_per_blkz))
2794 return -EINVAL;
2795 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
2796 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
2797 sbi->log_blocks_per_blkz;
2798 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
2799 FDEV(devi).nr_blkz++;
2800
2801 FDEV(devi).blkz_seq = f2fs_kzalloc(sbi,
2802 BITS_TO_LONGS(FDEV(devi).nr_blkz)
2803 * sizeof(unsigned long),
2804 GFP_KERNEL);
2805 if (!FDEV(devi).blkz_seq)
2806 return -ENOMEM;
2807
2808 #define F2FS_REPORT_NR_ZONES 4096
2809
2810 zones = f2fs_kzalloc(sbi,
2811 array_size(F2FS_REPORT_NR_ZONES,
2812 sizeof(struct blk_zone)),
2813 GFP_KERNEL);
2814 if (!zones)
2815 return -ENOMEM;
2816
2817 /* Get block zones type */
2818 while (zones && sector < nr_sectors) {
2819
2820 nr_zones = F2FS_REPORT_NR_ZONES;
2821 err = blkdev_report_zones(bdev, sector, zones, &nr_zones);
2822 if (err)
2823 break;
2824 if (!nr_zones) {
2825 err = -EIO;
2826 break;
2827 }
2828
2829 for (i = 0; i < nr_zones; i++) {
2830 if (zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL)
2831 set_bit(n, FDEV(devi).blkz_seq);
2832 sector += zones[i].len;
2833 n++;
2834 }
2835 }
2836
2837 kvfree(zones);
2838
2839 return err;
2840 }
2841 #endif
2842
2843 /*
2844 * Read f2fs raw super block.
2845 * Because we have two copies of super block, so read both of them
2846 * to get the first valid one. If any one of them is broken, we pass
2847 * them recovery flag back to the caller.
2848 */
2849 static int read_raw_super_block(struct f2fs_sb_info *sbi,
2850 struct f2fs_super_block **raw_super,
2851 int *valid_super_block, int *recovery)
2852 {
2853 struct super_block *sb = sbi->sb;
2854 int block;
2855 struct buffer_head *bh;
2856 struct f2fs_super_block *super;
2857 int err = 0;
2858
2859 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
2860 if (!super)
2861 return -ENOMEM;
2862
2863 for (block = 0; block < 2; block++) {
2864 bh = sb_bread(sb, block);
2865 if (!bh) {
2866 f2fs_err(sbi, "Unable to read %dth superblock",
2867 block + 1);
2868 err = -EIO;
2869 continue;
2870 }
2871
2872 /* sanity checking of raw super */
2873 err = sanity_check_raw_super(sbi, bh);
2874 if (err) {
2875 f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
2876 block + 1);
2877 brelse(bh);
2878 continue;
2879 }
2880
2881 if (!*raw_super) {
2882 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
2883 sizeof(*super));
2884 *valid_super_block = block;
2885 *raw_super = super;
2886 }
2887 brelse(bh);
2888 }
2889
2890 /* Fail to read any one of the superblocks*/
2891 if (err < 0)
2892 *recovery = 1;
2893
2894 /* No valid superblock */
2895 if (!*raw_super)
2896 kvfree(super);
2897 else
2898 err = 0;
2899
2900 return err;
2901 }
2902
2903 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
2904 {
2905 struct buffer_head *bh;
2906 __u32 crc = 0;
2907 int err;
2908
2909 if ((recover && f2fs_readonly(sbi->sb)) ||
2910 bdev_read_only(sbi->sb->s_bdev)) {
2911 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2912 return -EROFS;
2913 }
2914
2915 /* we should update superblock crc here */
2916 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
2917 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
2918 offsetof(struct f2fs_super_block, crc));
2919 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
2920 }
2921
2922 /* write back-up superblock first */
2923 bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
2924 if (!bh)
2925 return -EIO;
2926 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
2927 brelse(bh);
2928
2929 /* if we are in recovery path, skip writing valid superblock */
2930 if (recover || err)
2931 return err;
2932
2933 /* write current valid superblock */
2934 bh = sb_bread(sbi->sb, sbi->valid_super_block);
2935 if (!bh)
2936 return -EIO;
2937 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
2938 brelse(bh);
2939 return err;
2940 }
2941
2942 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
2943 {
2944 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2945 unsigned int max_devices = MAX_DEVICES;
2946 int i;
2947
2948 /* Initialize single device information */
2949 if (!RDEV(0).path[0]) {
2950 if (!bdev_is_zoned(sbi->sb->s_bdev))
2951 return 0;
2952 max_devices = 1;
2953 }
2954
2955 /*
2956 * Initialize multiple devices information, or single
2957 * zoned block device information.
2958 */
2959 sbi->devs = f2fs_kzalloc(sbi,
2960 array_size(max_devices,
2961 sizeof(struct f2fs_dev_info)),
2962 GFP_KERNEL);
2963 if (!sbi->devs)
2964 return -ENOMEM;
2965
2966 for (i = 0; i < max_devices; i++) {
2967
2968 if (i > 0 && !RDEV(i).path[0])
2969 break;
2970
2971 if (max_devices == 1) {
2972 /* Single zoned block device mount */
2973 FDEV(0).bdev =
2974 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
2975 sbi->sb->s_mode, sbi->sb->s_type);
2976 } else {
2977 /* Multi-device mount */
2978 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
2979 FDEV(i).total_segments =
2980 le32_to_cpu(RDEV(i).total_segments);
2981 if (i == 0) {
2982 FDEV(i).start_blk = 0;
2983 FDEV(i).end_blk = FDEV(i).start_blk +
2984 (FDEV(i).total_segments <<
2985 sbi->log_blocks_per_seg) - 1 +
2986 le32_to_cpu(raw_super->segment0_blkaddr);
2987 } else {
2988 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
2989 FDEV(i).end_blk = FDEV(i).start_blk +
2990 (FDEV(i).total_segments <<
2991 sbi->log_blocks_per_seg) - 1;
2992 }
2993 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
2994 sbi->sb->s_mode, sbi->sb->s_type);
2995 }
2996 if (IS_ERR(FDEV(i).bdev))
2997 return PTR_ERR(FDEV(i).bdev);
2998
2999 /* to release errored devices */
3000 sbi->s_ndevs = i + 1;
3001
3002 #ifdef CONFIG_BLK_DEV_ZONED
3003 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3004 !f2fs_sb_has_blkzoned(sbi)) {
3005 f2fs_err(sbi, "Zoned block device feature not enabled\n");
3006 return -EINVAL;
3007 }
3008 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3009 if (init_blkz_info(sbi, i)) {
3010 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3011 return -EINVAL;
3012 }
3013 if (max_devices == 1)
3014 break;
3015 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3016 i, FDEV(i).path,
3017 FDEV(i).total_segments,
3018 FDEV(i).start_blk, FDEV(i).end_blk,
3019 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3020 "Host-aware" : "Host-managed");
3021 continue;
3022 }
3023 #endif
3024 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3025 i, FDEV(i).path,
3026 FDEV(i).total_segments,
3027 FDEV(i).start_blk, FDEV(i).end_blk);
3028 }
3029 f2fs_info(sbi,
3030 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3031 return 0;
3032 }
3033
3034 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3035 {
3036 struct f2fs_sm_info *sm_i = SM_I(sbi);
3037
3038 /* adjust parameters according to the volume size */
3039 if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3040 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3041 sm_i->dcc_info->discard_granularity = 1;
3042 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3043 }
3044
3045 sbi->readdir_ra = 1;
3046 }
3047
3048 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3049 {
3050 struct f2fs_sb_info *sbi;
3051 struct f2fs_super_block *raw_super;
3052 struct inode *root;
3053 int err;
3054 bool skip_recovery = false, need_fsck = false;
3055 char *options = NULL;
3056 int recovery, i, valid_super_block;
3057 struct curseg_info *seg_i;
3058 int retry_cnt = 1;
3059
3060 try_onemore:
3061 err = -EINVAL;
3062 raw_super = NULL;
3063 valid_super_block = -1;
3064 recovery = 0;
3065
3066 /* allocate memory for f2fs-specific super block info */
3067 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3068 if (!sbi)
3069 return -ENOMEM;
3070
3071 sbi->sb = sb;
3072
3073 /* Load the checksum driver */
3074 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3075 if (IS_ERR(sbi->s_chksum_driver)) {
3076 f2fs_err(sbi, "Cannot load crc32 driver.");
3077 err = PTR_ERR(sbi->s_chksum_driver);
3078 sbi->s_chksum_driver = NULL;
3079 goto free_sbi;
3080 }
3081
3082 /* set a block size */
3083 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3084 f2fs_err(sbi, "unable to set blocksize");
3085 goto free_sbi;
3086 }
3087
3088 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3089 &recovery);
3090 if (err)
3091 goto free_sbi;
3092
3093 sb->s_fs_info = sbi;
3094 sbi->raw_super = raw_super;
3095
3096 /* precompute checksum seed for metadata */
3097 if (f2fs_sb_has_inode_chksum(sbi))
3098 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3099 sizeof(raw_super->uuid));
3100
3101 /*
3102 * The BLKZONED feature indicates that the drive was formatted with
3103 * zone alignment optimization. This is optional for host-aware
3104 * devices, but mandatory for host-managed zoned block devices.
3105 */
3106 #ifndef CONFIG_BLK_DEV_ZONED
3107 if (f2fs_sb_has_blkzoned(sbi)) {
3108 f2fs_err(sbi, "Zoned block device support is not enabled");
3109 err = -EOPNOTSUPP;
3110 goto free_sb_buf;
3111 }
3112 #endif
3113 default_options(sbi);
3114 /* parse mount options */
3115 options = kstrdup((const char *)data, GFP_KERNEL);
3116 if (data && !options) {
3117 err = -ENOMEM;
3118 goto free_sb_buf;
3119 }
3120
3121 err = parse_options(sb, options);
3122 if (err)
3123 goto free_options;
3124
3125 sbi->max_file_blocks = max_file_blocks();
3126 sb->s_maxbytes = sbi->max_file_blocks <<
3127 le32_to_cpu(raw_super->log_blocksize);
3128 sb->s_max_links = F2FS_LINK_MAX;
3129
3130 #ifdef CONFIG_QUOTA
3131 sb->dq_op = &f2fs_quota_operations;
3132 sb->s_qcop = &f2fs_quotactl_ops;
3133 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3134
3135 if (f2fs_sb_has_quota_ino(sbi)) {
3136 for (i = 0; i < MAXQUOTAS; i++) {
3137 if (f2fs_qf_ino(sbi->sb, i))
3138 sbi->nquota_files++;
3139 }
3140 }
3141 #endif
3142
3143 sb->s_op = &f2fs_sops;
3144 #ifdef CONFIG_FS_ENCRYPTION
3145 sb->s_cop = &f2fs_cryptops;
3146 #endif
3147 sb->s_xattr = f2fs_xattr_handlers;
3148 sb->s_export_op = &f2fs_export_ops;
3149 sb->s_magic = F2FS_SUPER_MAGIC;
3150 sb->s_time_gran = 1;
3151 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3152 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3153 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3154 sb->s_iflags |= SB_I_CGROUPWB;
3155
3156 /* init f2fs-specific super block info */
3157 sbi->valid_super_block = valid_super_block;
3158 mutex_init(&sbi->gc_mutex);
3159 mutex_init(&sbi->writepages);
3160 mutex_init(&sbi->cp_mutex);
3161 mutex_init(&sbi->resize_mutex);
3162 init_rwsem(&sbi->node_write);
3163 init_rwsem(&sbi->node_change);
3164
3165 /* disallow all the data/node/meta page writes */
3166 set_sbi_flag(sbi, SBI_POR_DOING);
3167 spin_lock_init(&sbi->stat_lock);
3168
3169 /* init iostat info */
3170 spin_lock_init(&sbi->iostat_lock);
3171 sbi->iostat_enable = false;
3172
3173 for (i = 0; i < NR_PAGE_TYPE; i++) {
3174 int n = (i == META) ? 1: NR_TEMP_TYPE;
3175 int j;
3176
3177 sbi->write_io[i] =
3178 f2fs_kmalloc(sbi,
3179 array_size(n,
3180 sizeof(struct f2fs_bio_info)),
3181 GFP_KERNEL);
3182 if (!sbi->write_io[i]) {
3183 err = -ENOMEM;
3184 goto free_bio_info;
3185 }
3186
3187 for (j = HOT; j < n; j++) {
3188 init_rwsem(&sbi->write_io[i][j].io_rwsem);
3189 sbi->write_io[i][j].sbi = sbi;
3190 sbi->write_io[i][j].bio = NULL;
3191 spin_lock_init(&sbi->write_io[i][j].io_lock);
3192 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3193 }
3194 }
3195
3196 init_rwsem(&sbi->cp_rwsem);
3197 init_rwsem(&sbi->quota_sem);
3198 init_waitqueue_head(&sbi->cp_wait);
3199 init_sb_info(sbi);
3200
3201 err = init_percpu_info(sbi);
3202 if (err)
3203 goto free_bio_info;
3204
3205 if (F2FS_IO_SIZE(sbi) > 1) {
3206 sbi->write_io_dummy =
3207 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3208 if (!sbi->write_io_dummy) {
3209 err = -ENOMEM;
3210 goto free_percpu;
3211 }
3212 }
3213
3214 /* get an inode for meta space */
3215 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3216 if (IS_ERR(sbi->meta_inode)) {
3217 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3218 err = PTR_ERR(sbi->meta_inode);
3219 goto free_io_dummy;
3220 }
3221
3222 err = f2fs_get_valid_checkpoint(sbi);
3223 if (err) {
3224 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3225 goto free_meta_inode;
3226 }
3227
3228 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3229 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3230 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3231 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3232 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3233 }
3234
3235 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3236 set_sbi_flag(sbi, SBI_NEED_FSCK);
3237
3238 /* Initialize device list */
3239 err = f2fs_scan_devices(sbi);
3240 if (err) {
3241 f2fs_err(sbi, "Failed to find devices");
3242 goto free_devices;
3243 }
3244
3245 sbi->total_valid_node_count =
3246 le32_to_cpu(sbi->ckpt->valid_node_count);
3247 percpu_counter_set(&sbi->total_valid_inode_count,
3248 le32_to_cpu(sbi->ckpt->valid_inode_count));
3249 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3250 sbi->total_valid_block_count =
3251 le64_to_cpu(sbi->ckpt->valid_block_count);
3252 sbi->last_valid_block_count = sbi->total_valid_block_count;
3253 sbi->reserved_blocks = 0;
3254 sbi->current_reserved_blocks = 0;
3255 limit_reserve_root(sbi);
3256
3257 for (i = 0; i < NR_INODE_TYPE; i++) {
3258 INIT_LIST_HEAD(&sbi->inode_list[i]);
3259 spin_lock_init(&sbi->inode_lock[i]);
3260 }
3261 mutex_init(&sbi->flush_lock);
3262
3263 f2fs_init_extent_cache_info(sbi);
3264
3265 f2fs_init_ino_entry_info(sbi);
3266
3267 f2fs_init_fsync_node_info(sbi);
3268
3269 /* setup f2fs internal modules */
3270 err = f2fs_build_segment_manager(sbi);
3271 if (err) {
3272 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3273 err);
3274 goto free_sm;
3275 }
3276 err = f2fs_build_node_manager(sbi);
3277 if (err) {
3278 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3279 err);
3280 goto free_nm;
3281 }
3282
3283 /* For write statistics */
3284 if (sb->s_bdev->bd_part)
3285 sbi->sectors_written_start =
3286 (u64)part_stat_read(sb->s_bdev->bd_part,
3287 sectors[STAT_WRITE]);
3288
3289 /* Read accumulated write IO statistics if exists */
3290 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3291 if (__exist_node_summaries(sbi))
3292 sbi->kbytes_written =
3293 le64_to_cpu(seg_i->journal->info.kbytes_written);
3294
3295 f2fs_build_gc_manager(sbi);
3296
3297 err = f2fs_build_stats(sbi);
3298 if (err)
3299 goto free_nm;
3300
3301 /* get an inode for node space */
3302 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3303 if (IS_ERR(sbi->node_inode)) {
3304 f2fs_err(sbi, "Failed to read node inode");
3305 err = PTR_ERR(sbi->node_inode);
3306 goto free_stats;
3307 }
3308
3309 /* read root inode and dentry */
3310 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3311 if (IS_ERR(root)) {
3312 f2fs_err(sbi, "Failed to read root inode");
3313 err = PTR_ERR(root);
3314 goto free_node_inode;
3315 }
3316 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3317 !root->i_size || !root->i_nlink) {
3318 iput(root);
3319 err = -EINVAL;
3320 goto free_node_inode;
3321 }
3322
3323 sb->s_root = d_make_root(root); /* allocate root dentry */
3324 if (!sb->s_root) {
3325 err = -ENOMEM;
3326 goto free_node_inode;
3327 }
3328
3329 err = f2fs_register_sysfs(sbi);
3330 if (err)
3331 goto free_root_inode;
3332
3333 #ifdef CONFIG_QUOTA
3334 /* Enable quota usage during mount */
3335 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3336 err = f2fs_enable_quotas(sb);
3337 if (err)
3338 f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3339 }
3340 #endif
3341 /* if there are nt orphan nodes free them */
3342 err = f2fs_recover_orphan_inodes(sbi);
3343 if (err)
3344 goto free_meta;
3345
3346 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3347 goto reset_checkpoint;
3348
3349 /* recover fsynced data */
3350 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
3351 /*
3352 * mount should be failed, when device has readonly mode, and
3353 * previous checkpoint was not done by clean system shutdown.
3354 */
3355 if (f2fs_hw_is_readonly(sbi)) {
3356 if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3357 err = -EROFS;
3358 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3359 goto free_meta;
3360 }
3361 f2fs_info(sbi, "write access unavailable, skipping recovery");
3362 goto reset_checkpoint;
3363 }
3364
3365 if (need_fsck)
3366 set_sbi_flag(sbi, SBI_NEED_FSCK);
3367
3368 if (skip_recovery)
3369 goto reset_checkpoint;
3370
3371 err = f2fs_recover_fsync_data(sbi, false);
3372 if (err < 0) {
3373 if (err != -ENOMEM)
3374 skip_recovery = true;
3375 need_fsck = true;
3376 f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3377 err);
3378 goto free_meta;
3379 }
3380 } else {
3381 err = f2fs_recover_fsync_data(sbi, true);
3382
3383 if (!f2fs_readonly(sb) && err > 0) {
3384 err = -EINVAL;
3385 f2fs_err(sbi, "Need to recover fsync data");
3386 goto free_meta;
3387 }
3388 }
3389 reset_checkpoint:
3390 /* f2fs_recover_fsync_data() cleared this already */
3391 clear_sbi_flag(sbi, SBI_POR_DOING);
3392
3393 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3394 err = f2fs_disable_checkpoint(sbi);
3395 if (err)
3396 goto sync_free_meta;
3397 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3398 f2fs_enable_checkpoint(sbi);
3399 }
3400
3401 /*
3402 * If filesystem is not mounted as read-only then
3403 * do start the gc_thread.
3404 */
3405 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
3406 /* After POR, we can run background GC thread.*/
3407 err = f2fs_start_gc_thread(sbi);
3408 if (err)
3409 goto sync_free_meta;
3410 }
3411 kvfree(options);
3412
3413 /* recover broken superblock */
3414 if (recovery) {
3415 err = f2fs_commit_super(sbi, true);
3416 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3417 sbi->valid_super_block ? 1 : 2, err);
3418 }
3419
3420 f2fs_join_shrinker(sbi);
3421
3422 f2fs_tuning_parameters(sbi);
3423
3424 f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3425 cur_cp_version(F2FS_CKPT(sbi)));
3426 f2fs_update_time(sbi, CP_TIME);
3427 f2fs_update_time(sbi, REQ_TIME);
3428 clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3429 return 0;
3430
3431 sync_free_meta:
3432 /* safe to flush all the data */
3433 sync_filesystem(sbi->sb);
3434 retry_cnt = 0;
3435
3436 free_meta:
3437 #ifdef CONFIG_QUOTA
3438 f2fs_truncate_quota_inode_pages(sb);
3439 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3440 f2fs_quota_off_umount(sbi->sb);
3441 #endif
3442 /*
3443 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3444 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3445 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3446 * falls into an infinite loop in f2fs_sync_meta_pages().
3447 */
3448 truncate_inode_pages_final(META_MAPPING(sbi));
3449 /* evict some inodes being cached by GC */
3450 evict_inodes(sb);
3451 f2fs_unregister_sysfs(sbi);
3452 free_root_inode:
3453 dput(sb->s_root);
3454 sb->s_root = NULL;
3455 free_node_inode:
3456 f2fs_release_ino_entry(sbi, true);
3457 truncate_inode_pages_final(NODE_MAPPING(sbi));
3458 iput(sbi->node_inode);
3459 sbi->node_inode = NULL;
3460 free_stats:
3461 f2fs_destroy_stats(sbi);
3462 free_nm:
3463 f2fs_destroy_node_manager(sbi);
3464 free_sm:
3465 f2fs_destroy_segment_manager(sbi);
3466 free_devices:
3467 destroy_device_list(sbi);
3468 kvfree(sbi->ckpt);
3469 free_meta_inode:
3470 make_bad_inode(sbi->meta_inode);
3471 iput(sbi->meta_inode);
3472 sbi->meta_inode = NULL;
3473 free_io_dummy:
3474 mempool_destroy(sbi->write_io_dummy);
3475 free_percpu:
3476 destroy_percpu_info(sbi);
3477 free_bio_info:
3478 for (i = 0; i < NR_PAGE_TYPE; i++)
3479 kvfree(sbi->write_io[i]);
3480 free_options:
3481 #ifdef CONFIG_QUOTA
3482 for (i = 0; i < MAXQUOTAS; i++)
3483 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
3484 #endif
3485 kvfree(options);
3486 free_sb_buf:
3487 kvfree(raw_super);
3488 free_sbi:
3489 if (sbi->s_chksum_driver)
3490 crypto_free_shash(sbi->s_chksum_driver);
3491 kvfree(sbi);
3492
3493 /* give only one another chance */
3494 if (retry_cnt > 0 && skip_recovery) {
3495 retry_cnt--;
3496 shrink_dcache_sb(sb);
3497 goto try_onemore;
3498 }
3499 return err;
3500 }
3501
3502 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3503 const char *dev_name, void *data)
3504 {
3505 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3506 }
3507
3508 static void kill_f2fs_super(struct super_block *sb)
3509 {
3510 if (sb->s_root) {
3511 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3512
3513 set_sbi_flag(sbi, SBI_IS_CLOSE);
3514 f2fs_stop_gc_thread(sbi);
3515 f2fs_stop_discard_thread(sbi);
3516
3517 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3518 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3519 struct cp_control cpc = {
3520 .reason = CP_UMOUNT,
3521 };
3522 f2fs_write_checkpoint(sbi, &cpc);
3523 }
3524
3525 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3526 sb->s_flags &= ~SB_RDONLY;
3527 }
3528 kill_block_super(sb);
3529 }
3530
3531 static struct file_system_type f2fs_fs_type = {
3532 .owner = THIS_MODULE,
3533 .name = "f2fs",
3534 .mount = f2fs_mount,
3535 .kill_sb = kill_f2fs_super,
3536 .fs_flags = FS_REQUIRES_DEV,
3537 };
3538 MODULE_ALIAS_FS("f2fs");
3539
3540 static int __init init_inodecache(void)
3541 {
3542 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3543 sizeof(struct f2fs_inode_info), 0,
3544 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3545 if (!f2fs_inode_cachep)
3546 return -ENOMEM;
3547 return 0;
3548 }
3549
3550 static void destroy_inodecache(void)
3551 {
3552 /*
3553 * Make sure all delayed rcu free inodes are flushed before we
3554 * destroy cache.
3555 */
3556 rcu_barrier();
3557 kmem_cache_destroy(f2fs_inode_cachep);
3558 }
3559
3560 static int __init init_f2fs_fs(void)
3561 {
3562 int err;
3563
3564 if (PAGE_SIZE != F2FS_BLKSIZE) {
3565 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3566 PAGE_SIZE, F2FS_BLKSIZE);
3567 return -EINVAL;
3568 }
3569
3570 f2fs_build_trace_ios();
3571
3572 err = init_inodecache();
3573 if (err)
3574 goto fail;
3575 err = f2fs_create_node_manager_caches();
3576 if (err)
3577 goto free_inodecache;
3578 err = f2fs_create_segment_manager_caches();
3579 if (err)
3580 goto free_node_manager_caches;
3581 err = f2fs_create_checkpoint_caches();
3582 if (err)
3583 goto free_segment_manager_caches;
3584 err = f2fs_create_extent_cache();
3585 if (err)
3586 goto free_checkpoint_caches;
3587 err = f2fs_init_sysfs();
3588 if (err)
3589 goto free_extent_cache;
3590 err = register_shrinker(&f2fs_shrinker_info);
3591 if (err)
3592 goto free_sysfs;
3593 err = register_filesystem(&f2fs_fs_type);
3594 if (err)
3595 goto free_shrinker;
3596 f2fs_create_root_stats();
3597 err = f2fs_init_post_read_processing();
3598 if (err)
3599 goto free_root_stats;
3600 return 0;
3601
3602 free_root_stats:
3603 f2fs_destroy_root_stats();
3604 unregister_filesystem(&f2fs_fs_type);
3605 free_shrinker:
3606 unregister_shrinker(&f2fs_shrinker_info);
3607 free_sysfs:
3608 f2fs_exit_sysfs();
3609 free_extent_cache:
3610 f2fs_destroy_extent_cache();
3611 free_checkpoint_caches:
3612 f2fs_destroy_checkpoint_caches();
3613 free_segment_manager_caches:
3614 f2fs_destroy_segment_manager_caches();
3615 free_node_manager_caches:
3616 f2fs_destroy_node_manager_caches();
3617 free_inodecache:
3618 destroy_inodecache();
3619 fail:
3620 return err;
3621 }
3622
3623 static void __exit exit_f2fs_fs(void)
3624 {
3625 f2fs_destroy_post_read_processing();
3626 f2fs_destroy_root_stats();
3627 unregister_filesystem(&f2fs_fs_type);
3628 unregister_shrinker(&f2fs_shrinker_info);
3629 f2fs_exit_sysfs();
3630 f2fs_destroy_extent_cache();
3631 f2fs_destroy_checkpoint_caches();
3632 f2fs_destroy_segment_manager_caches();
3633 f2fs_destroy_node_manager_caches();
3634 destroy_inodecache();
3635 f2fs_destroy_trace_ios();
3636 }
3637
3638 module_init(init_f2fs_fs)
3639 module_exit(exit_f2fs_fs)
3640
3641 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
3642 MODULE_DESCRIPTION("Flash Friendly File System");
3643 MODULE_LICENSE("GPL");
3644
Linux with added FPC-III support