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drm/panfrost: Remove set but not used variable 'bo'
[linux/fpc-iii.git] / fs / f2fs / super.c
blob65a7a432dfee26f0df4354a3254782b1e090e28a
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/super.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/fs.h>
11 #include <linux/statfs.h>
12 #include <linux/buffer_head.h>
13 #include <linux/backing-dev.h>
14 #include <linux/kthread.h>
15 #include <linux/parser.h>
16 #include <linux/mount.h>
17 #include <linux/seq_file.h>
18 #include <linux/proc_fs.h>
19 #include <linux/random.h>
20 #include <linux/exportfs.h>
21 #include <linux/blkdev.h>
22 #include <linux/quotaops.h>
23 #include <linux/f2fs_fs.h>
24 #include <linux/sysfs.h>
25 #include <linux/quota.h>
26 #include <linux/unicode.h>
27
28 #include "f2fs.h"
29 #include "node.h"
30 #include "segment.h"
31 #include "xattr.h"
32 #include "gc.h"
33 #include "trace.h"
34
35 #define CREATE_TRACE_POINTS
36 #include <trace/events/f2fs.h>
37
38 static struct kmem_cache *f2fs_inode_cachep;
39
40 #ifdef CONFIG_F2FS_FAULT_INJECTION
41
42 const char *f2fs_fault_name[FAULT_MAX] = {
43 [FAULT_KMALLOC] = "kmalloc",
44 [FAULT_KVMALLOC] = "kvmalloc",
45 [FAULT_PAGE_ALLOC] = "page alloc",
46 [FAULT_PAGE_GET] = "page get",
47 [FAULT_ALLOC_BIO] = "alloc bio",
48 [FAULT_ALLOC_NID] = "alloc nid",
49 [FAULT_ORPHAN] = "orphan",
50 [FAULT_BLOCK] = "no more block",
51 [FAULT_DIR_DEPTH] = "too big dir depth",
52 [FAULT_EVICT_INODE] = "evict_inode fail",
53 [FAULT_TRUNCATE] = "truncate fail",
54 [FAULT_READ_IO] = "read IO error",
55 [FAULT_CHECKPOINT] = "checkpoint error",
56 [FAULT_DISCARD] = "discard error",
57 [FAULT_WRITE_IO] = "write IO error",
58 };
59
60 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
61 unsigned int type)
62 {
63 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
64
65 if (rate) {
66 atomic_set(&ffi->inject_ops, 0);
67 ffi->inject_rate = rate;
68 }
69
70 if (type)
71 ffi->inject_type = type;
72
73 if (!rate && !type)
74 memset(ffi, 0, sizeof(struct f2fs_fault_info));
75 }
76 #endif
77
78 /* f2fs-wide shrinker description */
79 static struct shrinker f2fs_shrinker_info = {
80 .scan_objects = f2fs_shrink_scan,
81 .count_objects = f2fs_shrink_count,
82 .seeks = DEFAULT_SEEKS,
83 };
84
85 enum {
86 Opt_gc_background,
87 Opt_disable_roll_forward,
88 Opt_norecovery,
89 Opt_discard,
90 Opt_nodiscard,
91 Opt_noheap,
92 Opt_heap,
93 Opt_user_xattr,
94 Opt_nouser_xattr,
95 Opt_acl,
96 Opt_noacl,
97 Opt_active_logs,
98 Opt_disable_ext_identify,
99 Opt_inline_xattr,
100 Opt_noinline_xattr,
101 Opt_inline_xattr_size,
102 Opt_inline_data,
103 Opt_inline_dentry,
104 Opt_noinline_dentry,
105 Opt_flush_merge,
106 Opt_noflush_merge,
107 Opt_nobarrier,
108 Opt_fastboot,
109 Opt_extent_cache,
110 Opt_noextent_cache,
111 Opt_noinline_data,
112 Opt_data_flush,
113 Opt_reserve_root,
114 Opt_resgid,
115 Opt_resuid,
116 Opt_mode,
117 Opt_io_size_bits,
118 Opt_fault_injection,
119 Opt_fault_type,
120 Opt_lazytime,
121 Opt_nolazytime,
122 Opt_quota,
123 Opt_noquota,
124 Opt_usrquota,
125 Opt_grpquota,
126 Opt_prjquota,
127 Opt_usrjquota,
128 Opt_grpjquota,
129 Opt_prjjquota,
130 Opt_offusrjquota,
131 Opt_offgrpjquota,
132 Opt_offprjjquota,
133 Opt_jqfmt_vfsold,
134 Opt_jqfmt_vfsv0,
135 Opt_jqfmt_vfsv1,
136 Opt_whint,
137 Opt_alloc,
138 Opt_fsync,
139 Opt_test_dummy_encryption,
140 Opt_checkpoint_disable,
141 Opt_checkpoint_disable_cap,
142 Opt_checkpoint_disable_cap_perc,
143 Opt_checkpoint_enable,
144 Opt_compress_algorithm,
145 Opt_compress_log_size,
146 Opt_compress_extension,
147 Opt_err,
148 };
149
150 static match_table_t f2fs_tokens = {
151 {Opt_gc_background, "background_gc=%s"},
152 {Opt_disable_roll_forward, "disable_roll_forward"},
153 {Opt_norecovery, "norecovery"},
154 {Opt_discard, "discard"},
155 {Opt_nodiscard, "nodiscard"},
156 {Opt_noheap, "no_heap"},
157 {Opt_heap, "heap"},
158 {Opt_user_xattr, "user_xattr"},
159 {Opt_nouser_xattr, "nouser_xattr"},
160 {Opt_acl, "acl"},
161 {Opt_noacl, "noacl"},
162 {Opt_active_logs, "active_logs=%u"},
163 {Opt_disable_ext_identify, "disable_ext_identify"},
164 {Opt_inline_xattr, "inline_xattr"},
165 {Opt_noinline_xattr, "noinline_xattr"},
166 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
167 {Opt_inline_data, "inline_data"},
168 {Opt_inline_dentry, "inline_dentry"},
169 {Opt_noinline_dentry, "noinline_dentry"},
170 {Opt_flush_merge, "flush_merge"},
171 {Opt_noflush_merge, "noflush_merge"},
172 {Opt_nobarrier, "nobarrier"},
173 {Opt_fastboot, "fastboot"},
174 {Opt_extent_cache, "extent_cache"},
175 {Opt_noextent_cache, "noextent_cache"},
176 {Opt_noinline_data, "noinline_data"},
177 {Opt_data_flush, "data_flush"},
178 {Opt_reserve_root, "reserve_root=%u"},
179 {Opt_resgid, "resgid=%u"},
180 {Opt_resuid, "resuid=%u"},
181 {Opt_mode, "mode=%s"},
182 {Opt_io_size_bits, "io_bits=%u"},
183 {Opt_fault_injection, "fault_injection=%u"},
184 {Opt_fault_type, "fault_type=%u"},
185 {Opt_lazytime, "lazytime"},
186 {Opt_nolazytime, "nolazytime"},
187 {Opt_quota, "quota"},
188 {Opt_noquota, "noquota"},
189 {Opt_usrquota, "usrquota"},
190 {Opt_grpquota, "grpquota"},
191 {Opt_prjquota, "prjquota"},
192 {Opt_usrjquota, "usrjquota=%s"},
193 {Opt_grpjquota, "grpjquota=%s"},
194 {Opt_prjjquota, "prjjquota=%s"},
195 {Opt_offusrjquota, "usrjquota="},
196 {Opt_offgrpjquota, "grpjquota="},
197 {Opt_offprjjquota, "prjjquota="},
198 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
199 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
200 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
201 {Opt_whint, "whint_mode=%s"},
202 {Opt_alloc, "alloc_mode=%s"},
203 {Opt_fsync, "fsync_mode=%s"},
204 {Opt_test_dummy_encryption, "test_dummy_encryption"},
205 {Opt_checkpoint_disable, "checkpoint=disable"},
206 {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
207 {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
208 {Opt_checkpoint_enable, "checkpoint=enable"},
209 {Opt_compress_algorithm, "compress_algorithm=%s"},
210 {Opt_compress_log_size, "compress_log_size=%u"},
211 {Opt_compress_extension, "compress_extension=%s"},
212 {Opt_err, NULL},
213 };
214
215 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
216 {
217 struct va_format vaf;
218 va_list args;
219 int level;
220
221 va_start(args, fmt);
222
223 level = printk_get_level(fmt);
224 vaf.fmt = printk_skip_level(fmt);
225 vaf.va = &args;
226 printk("%c%cF2FS-fs (%s): %pV\n",
227 KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
228
229 va_end(args);
230 }
231
232 #ifdef CONFIG_UNICODE
233 static const struct f2fs_sb_encodings {
234 __u16 magic;
235 char *name;
236 char *version;
237 } f2fs_sb_encoding_map[] = {
238 {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
239 };
240
241 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
242 const struct f2fs_sb_encodings **encoding,
243 __u16 *flags)
244 {
245 __u16 magic = le16_to_cpu(sb->s_encoding);
246 int i;
247
248 for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
249 if (magic == f2fs_sb_encoding_map[i].magic)
250 break;
251
252 if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
253 return -EINVAL;
254
255 *encoding = &f2fs_sb_encoding_map[i];
256 *flags = le16_to_cpu(sb->s_encoding_flags);
257
258 return 0;
259 }
260 #endif
261
262 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
263 {
264 block_t limit = min((sbi->user_block_count << 1) / 1000,
265 sbi->user_block_count - sbi->reserved_blocks);
266
267 /* limit is 0.2% */
268 if (test_opt(sbi, RESERVE_ROOT) &&
269 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
270 F2FS_OPTION(sbi).root_reserved_blocks = limit;
271 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
272 F2FS_OPTION(sbi).root_reserved_blocks);
273 }
274 if (!test_opt(sbi, RESERVE_ROOT) &&
275 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
276 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
277 !gid_eq(F2FS_OPTION(sbi).s_resgid,
278 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
279 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
280 from_kuid_munged(&init_user_ns,
281 F2FS_OPTION(sbi).s_resuid),
282 from_kgid_munged(&init_user_ns,
283 F2FS_OPTION(sbi).s_resgid));
284 }
285
286 static void init_once(void *foo)
287 {
288 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
289
290 inode_init_once(&fi->vfs_inode);
291 }
292
293 #ifdef CONFIG_QUOTA
294 static const char * const quotatypes[] = INITQFNAMES;
295 #define QTYPE2NAME(t) (quotatypes[t])
296 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
297 substring_t *args)
298 {
299 struct f2fs_sb_info *sbi = F2FS_SB(sb);
300 char *qname;
301 int ret = -EINVAL;
302
303 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
304 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
305 return -EINVAL;
306 }
307 if (f2fs_sb_has_quota_ino(sbi)) {
308 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
309 return 0;
310 }
311
312 qname = match_strdup(args);
313 if (!qname) {
314 f2fs_err(sbi, "Not enough memory for storing quotafile name");
315 return -ENOMEM;
316 }
317 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
318 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
319 ret = 0;
320 else
321 f2fs_err(sbi, "%s quota file already specified",
322 QTYPE2NAME(qtype));
323 goto errout;
324 }
325 if (strchr(qname, '/')) {
326 f2fs_err(sbi, "quotafile must be on filesystem root");
327 goto errout;
328 }
329 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
330 set_opt(sbi, QUOTA);
331 return 0;
332 errout:
333 kvfree(qname);
334 return ret;
335 }
336
337 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
338 {
339 struct f2fs_sb_info *sbi = F2FS_SB(sb);
340
341 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
342 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
343 return -EINVAL;
344 }
345 kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
346 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
347 return 0;
348 }
349
350 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
351 {
352 /*
353 * We do the test below only for project quotas. 'usrquota' and
354 * 'grpquota' mount options are allowed even without quota feature
355 * to support legacy quotas in quota files.
356 */
357 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
358 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
359 return -1;
360 }
361 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
362 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
363 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
364 if (test_opt(sbi, USRQUOTA) &&
365 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
366 clear_opt(sbi, USRQUOTA);
367
368 if (test_opt(sbi, GRPQUOTA) &&
369 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
370 clear_opt(sbi, GRPQUOTA);
371
372 if (test_opt(sbi, PRJQUOTA) &&
373 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
374 clear_opt(sbi, PRJQUOTA);
375
376 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
377 test_opt(sbi, PRJQUOTA)) {
378 f2fs_err(sbi, "old and new quota format mixing");
379 return -1;
380 }
381
382 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
383 f2fs_err(sbi, "journaled quota format not specified");
384 return -1;
385 }
386 }
387
388 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
389 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
390 F2FS_OPTION(sbi).s_jquota_fmt = 0;
391 }
392 return 0;
393 }
394 #endif
395
396 static int parse_options(struct super_block *sb, char *options)
397 {
398 struct f2fs_sb_info *sbi = F2FS_SB(sb);
399 substring_t args[MAX_OPT_ARGS];
400 unsigned char (*ext)[F2FS_EXTENSION_LEN];
401 char *p, *name;
402 int arg = 0, ext_cnt;
403 kuid_t uid;
404 kgid_t gid;
405 #ifdef CONFIG_QUOTA
406 int ret;
407 #endif
408
409 if (!options)
410 return 0;
411
412 while ((p = strsep(&options, ",")) != NULL) {
413 int token;
414 if (!*p)
415 continue;
416 /*
417 * Initialize args struct so we know whether arg was
418 * found; some options take optional arguments.
419 */
420 args[0].to = args[0].from = NULL;
421 token = match_token(p, f2fs_tokens, args);
422
423 switch (token) {
424 case Opt_gc_background:
425 name = match_strdup(&args[0]);
426
427 if (!name)
428 return -ENOMEM;
429 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
430 set_opt(sbi, BG_GC);
431 clear_opt(sbi, FORCE_FG_GC);
432 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
433 clear_opt(sbi, BG_GC);
434 clear_opt(sbi, FORCE_FG_GC);
435 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
436 set_opt(sbi, BG_GC);
437 set_opt(sbi, FORCE_FG_GC);
438 } else {
439 kvfree(name);
440 return -EINVAL;
441 }
442 kvfree(name);
443 break;
444 case Opt_disable_roll_forward:
445 set_opt(sbi, DISABLE_ROLL_FORWARD);
446 break;
447 case Opt_norecovery:
448 /* this option mounts f2fs with ro */
449 set_opt(sbi, DISABLE_ROLL_FORWARD);
450 if (!f2fs_readonly(sb))
451 return -EINVAL;
452 break;
453 case Opt_discard:
454 set_opt(sbi, DISCARD);
455 break;
456 case Opt_nodiscard:
457 if (f2fs_sb_has_blkzoned(sbi)) {
458 f2fs_warn(sbi, "discard is required for zoned block devices");
459 return -EINVAL;
460 }
461 clear_opt(sbi, DISCARD);
462 break;
463 case Opt_noheap:
464 set_opt(sbi, NOHEAP);
465 break;
466 case Opt_heap:
467 clear_opt(sbi, NOHEAP);
468 break;
469 #ifdef CONFIG_F2FS_FS_XATTR
470 case Opt_user_xattr:
471 set_opt(sbi, XATTR_USER);
472 break;
473 case Opt_nouser_xattr:
474 clear_opt(sbi, XATTR_USER);
475 break;
476 case Opt_inline_xattr:
477 set_opt(sbi, INLINE_XATTR);
478 break;
479 case Opt_noinline_xattr:
480 clear_opt(sbi, INLINE_XATTR);
481 break;
482 case Opt_inline_xattr_size:
483 if (args->from && match_int(args, &arg))
484 return -EINVAL;
485 set_opt(sbi, INLINE_XATTR_SIZE);
486 F2FS_OPTION(sbi).inline_xattr_size = arg;
487 break;
488 #else
489 case Opt_user_xattr:
490 f2fs_info(sbi, "user_xattr options not supported");
491 break;
492 case Opt_nouser_xattr:
493 f2fs_info(sbi, "nouser_xattr options not supported");
494 break;
495 case Opt_inline_xattr:
496 f2fs_info(sbi, "inline_xattr options not supported");
497 break;
498 case Opt_noinline_xattr:
499 f2fs_info(sbi, "noinline_xattr options not supported");
500 break;
501 #endif
502 #ifdef CONFIG_F2FS_FS_POSIX_ACL
503 case Opt_acl:
504 set_opt(sbi, POSIX_ACL);
505 break;
506 case Opt_noacl:
507 clear_opt(sbi, POSIX_ACL);
508 break;
509 #else
510 case Opt_acl:
511 f2fs_info(sbi, "acl options not supported");
512 break;
513 case Opt_noacl:
514 f2fs_info(sbi, "noacl options not supported");
515 break;
516 #endif
517 case Opt_active_logs:
518 if (args->from && match_int(args, &arg))
519 return -EINVAL;
520 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
521 return -EINVAL;
522 F2FS_OPTION(sbi).active_logs = arg;
523 break;
524 case Opt_disable_ext_identify:
525 set_opt(sbi, DISABLE_EXT_IDENTIFY);
526 break;
527 case Opt_inline_data:
528 set_opt(sbi, INLINE_DATA);
529 break;
530 case Opt_inline_dentry:
531 set_opt(sbi, INLINE_DENTRY);
532 break;
533 case Opt_noinline_dentry:
534 clear_opt(sbi, INLINE_DENTRY);
535 break;
536 case Opt_flush_merge:
537 set_opt(sbi, FLUSH_MERGE);
538 break;
539 case Opt_noflush_merge:
540 clear_opt(sbi, FLUSH_MERGE);
541 break;
542 case Opt_nobarrier:
543 set_opt(sbi, NOBARRIER);
544 break;
545 case Opt_fastboot:
546 set_opt(sbi, FASTBOOT);
547 break;
548 case Opt_extent_cache:
549 set_opt(sbi, EXTENT_CACHE);
550 break;
551 case Opt_noextent_cache:
552 clear_opt(sbi, EXTENT_CACHE);
553 break;
554 case Opt_noinline_data:
555 clear_opt(sbi, INLINE_DATA);
556 break;
557 case Opt_data_flush:
558 set_opt(sbi, DATA_FLUSH);
559 break;
560 case Opt_reserve_root:
561 if (args->from && match_int(args, &arg))
562 return -EINVAL;
563 if (test_opt(sbi, RESERVE_ROOT)) {
564 f2fs_info(sbi, "Preserve previous reserve_root=%u",
565 F2FS_OPTION(sbi).root_reserved_blocks);
566 } else {
567 F2FS_OPTION(sbi).root_reserved_blocks = arg;
568 set_opt(sbi, RESERVE_ROOT);
569 }
570 break;
571 case Opt_resuid:
572 if (args->from && match_int(args, &arg))
573 return -EINVAL;
574 uid = make_kuid(current_user_ns(), arg);
575 if (!uid_valid(uid)) {
576 f2fs_err(sbi, "Invalid uid value %d", arg);
577 return -EINVAL;
578 }
579 F2FS_OPTION(sbi).s_resuid = uid;
580 break;
581 case Opt_resgid:
582 if (args->from && match_int(args, &arg))
583 return -EINVAL;
584 gid = make_kgid(current_user_ns(), arg);
585 if (!gid_valid(gid)) {
586 f2fs_err(sbi, "Invalid gid value %d", arg);
587 return -EINVAL;
588 }
589 F2FS_OPTION(sbi).s_resgid = gid;
590 break;
591 case Opt_mode:
592 name = match_strdup(&args[0]);
593
594 if (!name)
595 return -ENOMEM;
596 if (strlen(name) == 8 &&
597 !strncmp(name, "adaptive", 8)) {
598 if (f2fs_sb_has_blkzoned(sbi)) {
599 f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
600 kvfree(name);
601 return -EINVAL;
602 }
603 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
604 } else if (strlen(name) == 3 &&
605 !strncmp(name, "lfs", 3)) {
606 set_opt_mode(sbi, F2FS_MOUNT_LFS);
607 } else {
608 kvfree(name);
609 return -EINVAL;
610 }
611 kvfree(name);
612 break;
613 case Opt_io_size_bits:
614 if (args->from && match_int(args, &arg))
615 return -EINVAL;
616 if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
617 f2fs_warn(sbi, "Not support %d, larger than %d",
618 1 << arg, BIO_MAX_PAGES);
619 return -EINVAL;
620 }
621 F2FS_OPTION(sbi).write_io_size_bits = arg;
622 break;
623 #ifdef CONFIG_F2FS_FAULT_INJECTION
624 case Opt_fault_injection:
625 if (args->from && match_int(args, &arg))
626 return -EINVAL;
627 f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
628 set_opt(sbi, FAULT_INJECTION);
629 break;
630
631 case Opt_fault_type:
632 if (args->from && match_int(args, &arg))
633 return -EINVAL;
634 f2fs_build_fault_attr(sbi, 0, arg);
635 set_opt(sbi, FAULT_INJECTION);
636 break;
637 #else
638 case Opt_fault_injection:
639 f2fs_info(sbi, "fault_injection options not supported");
640 break;
641
642 case Opt_fault_type:
643 f2fs_info(sbi, "fault_type options not supported");
644 break;
645 #endif
646 case Opt_lazytime:
647 sb->s_flags |= SB_LAZYTIME;
648 break;
649 case Opt_nolazytime:
650 sb->s_flags &= ~SB_LAZYTIME;
651 break;
652 #ifdef CONFIG_QUOTA
653 case Opt_quota:
654 case Opt_usrquota:
655 set_opt(sbi, USRQUOTA);
656 break;
657 case Opt_grpquota:
658 set_opt(sbi, GRPQUOTA);
659 break;
660 case Opt_prjquota:
661 set_opt(sbi, PRJQUOTA);
662 break;
663 case Opt_usrjquota:
664 ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
665 if (ret)
666 return ret;
667 break;
668 case Opt_grpjquota:
669 ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
670 if (ret)
671 return ret;
672 break;
673 case Opt_prjjquota:
674 ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
675 if (ret)
676 return ret;
677 break;
678 case Opt_offusrjquota:
679 ret = f2fs_clear_qf_name(sb, USRQUOTA);
680 if (ret)
681 return ret;
682 break;
683 case Opt_offgrpjquota:
684 ret = f2fs_clear_qf_name(sb, GRPQUOTA);
685 if (ret)
686 return ret;
687 break;
688 case Opt_offprjjquota:
689 ret = f2fs_clear_qf_name(sb, PRJQUOTA);
690 if (ret)
691 return ret;
692 break;
693 case Opt_jqfmt_vfsold:
694 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
695 break;
696 case Opt_jqfmt_vfsv0:
697 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
698 break;
699 case Opt_jqfmt_vfsv1:
700 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
701 break;
702 case Opt_noquota:
703 clear_opt(sbi, QUOTA);
704 clear_opt(sbi, USRQUOTA);
705 clear_opt(sbi, GRPQUOTA);
706 clear_opt(sbi, PRJQUOTA);
707 break;
708 #else
709 case Opt_quota:
710 case Opt_usrquota:
711 case Opt_grpquota:
712 case Opt_prjquota:
713 case Opt_usrjquota:
714 case Opt_grpjquota:
715 case Opt_prjjquota:
716 case Opt_offusrjquota:
717 case Opt_offgrpjquota:
718 case Opt_offprjjquota:
719 case Opt_jqfmt_vfsold:
720 case Opt_jqfmt_vfsv0:
721 case Opt_jqfmt_vfsv1:
722 case Opt_noquota:
723 f2fs_info(sbi, "quota operations not supported");
724 break;
725 #endif
726 case Opt_whint:
727 name = match_strdup(&args[0]);
728 if (!name)
729 return -ENOMEM;
730 if (strlen(name) == 10 &&
731 !strncmp(name, "user-based", 10)) {
732 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
733 } else if (strlen(name) == 3 &&
734 !strncmp(name, "off", 3)) {
735 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
736 } else if (strlen(name) == 8 &&
737 !strncmp(name, "fs-based", 8)) {
738 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
739 } else {
740 kvfree(name);
741 return -EINVAL;
742 }
743 kvfree(name);
744 break;
745 case Opt_alloc:
746 name = match_strdup(&args[0]);
747 if (!name)
748 return -ENOMEM;
749
750 if (strlen(name) == 7 &&
751 !strncmp(name, "default", 7)) {
752 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
753 } else if (strlen(name) == 5 &&
754 !strncmp(name, "reuse", 5)) {
755 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
756 } else {
757 kvfree(name);
758 return -EINVAL;
759 }
760 kvfree(name);
761 break;
762 case Opt_fsync:
763 name = match_strdup(&args[0]);
764 if (!name)
765 return -ENOMEM;
766 if (strlen(name) == 5 &&
767 !strncmp(name, "posix", 5)) {
768 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
769 } else if (strlen(name) == 6 &&
770 !strncmp(name, "strict", 6)) {
771 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
772 } else if (strlen(name) == 9 &&
773 !strncmp(name, "nobarrier", 9)) {
774 F2FS_OPTION(sbi).fsync_mode =
775 FSYNC_MODE_NOBARRIER;
776 } else {
777 kvfree(name);
778 return -EINVAL;
779 }
780 kvfree(name);
781 break;
782 case Opt_test_dummy_encryption:
783 #ifdef CONFIG_FS_ENCRYPTION
784 if (!f2fs_sb_has_encrypt(sbi)) {
785 f2fs_err(sbi, "Encrypt feature is off");
786 return -EINVAL;
787 }
788
789 F2FS_OPTION(sbi).test_dummy_encryption = true;
790 f2fs_info(sbi, "Test dummy encryption mode enabled");
791 #else
792 f2fs_info(sbi, "Test dummy encryption mount option ignored");
793 #endif
794 break;
795 case Opt_checkpoint_disable_cap_perc:
796 if (args->from && match_int(args, &arg))
797 return -EINVAL;
798 if (arg < 0 || arg > 100)
799 return -EINVAL;
800 if (arg == 100)
801 F2FS_OPTION(sbi).unusable_cap =
802 sbi->user_block_count;
803 else
804 F2FS_OPTION(sbi).unusable_cap =
805 (sbi->user_block_count / 100) * arg;
806 set_opt(sbi, DISABLE_CHECKPOINT);
807 break;
808 case Opt_checkpoint_disable_cap:
809 if (args->from && match_int(args, &arg))
810 return -EINVAL;
811 F2FS_OPTION(sbi).unusable_cap = arg;
812 set_opt(sbi, DISABLE_CHECKPOINT);
813 break;
814 case Opt_checkpoint_disable:
815 set_opt(sbi, DISABLE_CHECKPOINT);
816 break;
817 case Opt_checkpoint_enable:
818 clear_opt(sbi, DISABLE_CHECKPOINT);
819 break;
820 case Opt_compress_algorithm:
821 if (!f2fs_sb_has_compression(sbi)) {
822 f2fs_err(sbi, "Compression feature if off");
823 return -EINVAL;
824 }
825 name = match_strdup(&args[0]);
826 if (!name)
827 return -ENOMEM;
828 if (strlen(name) == 3 && !strcmp(name, "lzo")) {
829 F2FS_OPTION(sbi).compress_algorithm =
830 COMPRESS_LZO;
831 } else if (strlen(name) == 3 &&
832 !strcmp(name, "lz4")) {
833 F2FS_OPTION(sbi).compress_algorithm =
834 COMPRESS_LZ4;
835 } else {
836 kfree(name);
837 return -EINVAL;
838 }
839 kfree(name);
840 break;
841 case Opt_compress_log_size:
842 if (!f2fs_sb_has_compression(sbi)) {
843 f2fs_err(sbi, "Compression feature is off");
844 return -EINVAL;
845 }
846 if (args->from && match_int(args, &arg))
847 return -EINVAL;
848 if (arg < MIN_COMPRESS_LOG_SIZE ||
849 arg > MAX_COMPRESS_LOG_SIZE) {
850 f2fs_err(sbi,
851 "Compress cluster log size is out of range");
852 return -EINVAL;
853 }
854 F2FS_OPTION(sbi).compress_log_size = arg;
855 break;
856 case Opt_compress_extension:
857 if (!f2fs_sb_has_compression(sbi)) {
858 f2fs_err(sbi, "Compression feature is off");
859 return -EINVAL;
860 }
861 name = match_strdup(&args[0]);
862 if (!name)
863 return -ENOMEM;
864
865 ext = F2FS_OPTION(sbi).extensions;
866 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
867
868 if (strlen(name) >= F2FS_EXTENSION_LEN ||
869 ext_cnt >= COMPRESS_EXT_NUM) {
870 f2fs_err(sbi,
871 "invalid extension length/number");
872 kfree(name);
873 return -EINVAL;
874 }
875
876 strcpy(ext[ext_cnt], name);
877 F2FS_OPTION(sbi).compress_ext_cnt++;
878 kfree(name);
879 break;
880 default:
881 f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
882 p);
883 return -EINVAL;
884 }
885 }
886 #ifdef CONFIG_QUOTA
887 if (f2fs_check_quota_options(sbi))
888 return -EINVAL;
889 #else
890 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
891 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
892 return -EINVAL;
893 }
894 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
895 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
896 return -EINVAL;
897 }
898 #endif
899 #ifndef CONFIG_UNICODE
900 if (f2fs_sb_has_casefold(sbi)) {
901 f2fs_err(sbi,
902 "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
903 return -EINVAL;
904 }
905 #endif
906
907 if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
908 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
909 F2FS_IO_SIZE_KB(sbi));
910 return -EINVAL;
911 }
912
913 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
914 int min_size, max_size;
915
916 if (!f2fs_sb_has_extra_attr(sbi) ||
917 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
918 f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
919 return -EINVAL;
920 }
921 if (!test_opt(sbi, INLINE_XATTR)) {
922 f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
923 return -EINVAL;
924 }
925
926 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
927 max_size = MAX_INLINE_XATTR_SIZE;
928
929 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
930 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
931 f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
932 min_size, max_size);
933 return -EINVAL;
934 }
935 }
936
937 if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
938 f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
939 return -EINVAL;
940 }
941
942 /* Not pass down write hints if the number of active logs is lesser
943 * than NR_CURSEG_TYPE.
944 */
945 if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
946 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
947 return 0;
948 }
949
950 static struct inode *f2fs_alloc_inode(struct super_block *sb)
951 {
952 struct f2fs_inode_info *fi;
953
954 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
955 if (!fi)
956 return NULL;
957
958 init_once((void *) fi);
959
960 /* Initialize f2fs-specific inode info */
961 atomic_set(&fi->dirty_pages, 0);
962 init_rwsem(&fi->i_sem);
963 INIT_LIST_HEAD(&fi->dirty_list);
964 INIT_LIST_HEAD(&fi->gdirty_list);
965 INIT_LIST_HEAD(&fi->inmem_ilist);
966 INIT_LIST_HEAD(&fi->inmem_pages);
967 mutex_init(&fi->inmem_lock);
968 init_rwsem(&fi->i_gc_rwsem[READ]);
969 init_rwsem(&fi->i_gc_rwsem[WRITE]);
970 init_rwsem(&fi->i_mmap_sem);
971 init_rwsem(&fi->i_xattr_sem);
972
973 /* Will be used by directory only */
974 fi->i_dir_level = F2FS_SB(sb)->dir_level;
975
976 return &fi->vfs_inode;
977 }
978
979 static int f2fs_drop_inode(struct inode *inode)
980 {
981 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
982 int ret;
983
984 /*
985 * during filesystem shutdown, if checkpoint is disabled,
986 * drop useless meta/node dirty pages.
987 */
988 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
989 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
990 inode->i_ino == F2FS_META_INO(sbi)) {
991 trace_f2fs_drop_inode(inode, 1);
992 return 1;
993 }
994 }
995
996 /*
997 * This is to avoid a deadlock condition like below.
998 * writeback_single_inode(inode)
999 * - f2fs_write_data_page
1000 * - f2fs_gc -> iput -> evict
1001 * - inode_wait_for_writeback(inode)
1002 */
1003 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1004 if (!inode->i_nlink && !is_bad_inode(inode)) {
1005 /* to avoid evict_inode call simultaneously */
1006 atomic_inc(&inode->i_count);
1007 spin_unlock(&inode->i_lock);
1008
1009 /* some remained atomic pages should discarded */
1010 if (f2fs_is_atomic_file(inode))
1011 f2fs_drop_inmem_pages(inode);
1012
1013 /* should remain fi->extent_tree for writepage */
1014 f2fs_destroy_extent_node(inode);
1015
1016 sb_start_intwrite(inode->i_sb);
1017 f2fs_i_size_write(inode, 0);
1018
1019 f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1020 inode, NULL, 0, DATA);
1021 truncate_inode_pages_final(inode->i_mapping);
1022
1023 if (F2FS_HAS_BLOCKS(inode))
1024 f2fs_truncate(inode);
1025
1026 sb_end_intwrite(inode->i_sb);
1027
1028 spin_lock(&inode->i_lock);
1029 atomic_dec(&inode->i_count);
1030 }
1031 trace_f2fs_drop_inode(inode, 0);
1032 return 0;
1033 }
1034 ret = generic_drop_inode(inode);
1035 if (!ret)
1036 ret = fscrypt_drop_inode(inode);
1037 trace_f2fs_drop_inode(inode, ret);
1038 return ret;
1039 }
1040
1041 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1042 {
1043 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1044 int ret = 0;
1045
1046 spin_lock(&sbi->inode_lock[DIRTY_META]);
1047 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1048 ret = 1;
1049 } else {
1050 set_inode_flag(inode, FI_DIRTY_INODE);
1051 stat_inc_dirty_inode(sbi, DIRTY_META);
1052 }
1053 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1054 list_add_tail(&F2FS_I(inode)->gdirty_list,
1055 &sbi->inode_list[DIRTY_META]);
1056 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1057 }
1058 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1059 return ret;
1060 }
1061
1062 void f2fs_inode_synced(struct inode *inode)
1063 {
1064 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1065
1066 spin_lock(&sbi->inode_lock[DIRTY_META]);
1067 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1068 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1069 return;
1070 }
1071 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1072 list_del_init(&F2FS_I(inode)->gdirty_list);
1073 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1074 }
1075 clear_inode_flag(inode, FI_DIRTY_INODE);
1076 clear_inode_flag(inode, FI_AUTO_RECOVER);
1077 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1078 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1079 }
1080
1081 /*
1082 * f2fs_dirty_inode() is called from __mark_inode_dirty()
1083 *
1084 * We should call set_dirty_inode to write the dirty inode through write_inode.
1085 */
1086 static void f2fs_dirty_inode(struct inode *inode, int flags)
1087 {
1088 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1089
1090 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1091 inode->i_ino == F2FS_META_INO(sbi))
1092 return;
1093
1094 if (flags == I_DIRTY_TIME)
1095 return;
1096
1097 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1098 clear_inode_flag(inode, FI_AUTO_RECOVER);
1099
1100 f2fs_inode_dirtied(inode, false);
1101 }
1102
1103 static void f2fs_free_inode(struct inode *inode)
1104 {
1105 fscrypt_free_inode(inode);
1106 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1107 }
1108
1109 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1110 {
1111 percpu_counter_destroy(&sbi->alloc_valid_block_count);
1112 percpu_counter_destroy(&sbi->total_valid_inode_count);
1113 }
1114
1115 static void destroy_device_list(struct f2fs_sb_info *sbi)
1116 {
1117 int i;
1118
1119 for (i = 0; i < sbi->s_ndevs; i++) {
1120 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1121 #ifdef CONFIG_BLK_DEV_ZONED
1122 kvfree(FDEV(i).blkz_seq);
1123 #endif
1124 }
1125 kvfree(sbi->devs);
1126 }
1127
1128 static void f2fs_put_super(struct super_block *sb)
1129 {
1130 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1131 int i;
1132 bool dropped;
1133
1134 f2fs_quota_off_umount(sb);
1135
1136 /* prevent remaining shrinker jobs */
1137 mutex_lock(&sbi->umount_mutex);
1138
1139 /*
1140 * We don't need to do checkpoint when superblock is clean.
1141 * But, the previous checkpoint was not done by umount, it needs to do
1142 * clean checkpoint again.
1143 */
1144 if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1145 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1146 struct cp_control cpc = {
1147 .reason = CP_UMOUNT,
1148 };
1149 f2fs_write_checkpoint(sbi, &cpc);
1150 }
1151
1152 /* be sure to wait for any on-going discard commands */
1153 dropped = f2fs_issue_discard_timeout(sbi);
1154
1155 if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1156 !sbi->discard_blks && !dropped) {
1157 struct cp_control cpc = {
1158 .reason = CP_UMOUNT | CP_TRIMMED,
1159 };
1160 f2fs_write_checkpoint(sbi, &cpc);
1161 }
1162
1163 /*
1164 * normally superblock is clean, so we need to release this.
1165 * In addition, EIO will skip do checkpoint, we need this as well.
1166 */
1167 f2fs_release_ino_entry(sbi, true);
1168
1169 f2fs_leave_shrinker(sbi);
1170 mutex_unlock(&sbi->umount_mutex);
1171
1172 /* our cp_error case, we can wait for any writeback page */
1173 f2fs_flush_merged_writes(sbi);
1174
1175 f2fs_wait_on_all_pages_writeback(sbi);
1176
1177 f2fs_bug_on(sbi, sbi->fsync_node_num);
1178
1179 iput(sbi->node_inode);
1180 sbi->node_inode = NULL;
1181
1182 iput(sbi->meta_inode);
1183 sbi->meta_inode = NULL;
1184
1185 /*
1186 * iput() can update stat information, if f2fs_write_checkpoint()
1187 * above failed with error.
1188 */
1189 f2fs_destroy_stats(sbi);
1190
1191 /* destroy f2fs internal modules */
1192 f2fs_destroy_node_manager(sbi);
1193 f2fs_destroy_segment_manager(sbi);
1194
1195 f2fs_destroy_post_read_wq(sbi);
1196
1197 kvfree(sbi->ckpt);
1198
1199 f2fs_unregister_sysfs(sbi);
1200
1201 sb->s_fs_info = NULL;
1202 if (sbi->s_chksum_driver)
1203 crypto_free_shash(sbi->s_chksum_driver);
1204 kvfree(sbi->raw_super);
1205
1206 destroy_device_list(sbi);
1207 mempool_destroy(sbi->write_io_dummy);
1208 #ifdef CONFIG_QUOTA
1209 for (i = 0; i < MAXQUOTAS; i++)
1210 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1211 #endif
1212 destroy_percpu_info(sbi);
1213 for (i = 0; i < NR_PAGE_TYPE; i++)
1214 kvfree(sbi->write_io[i]);
1215 #ifdef CONFIG_UNICODE
1216 utf8_unload(sbi->s_encoding);
1217 #endif
1218 kvfree(sbi);
1219 }
1220
1221 int f2fs_sync_fs(struct super_block *sb, int sync)
1222 {
1223 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1224 int err = 0;
1225
1226 if (unlikely(f2fs_cp_error(sbi)))
1227 return 0;
1228 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1229 return 0;
1230
1231 trace_f2fs_sync_fs(sb, sync);
1232
1233 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1234 return -EAGAIN;
1235
1236 if (sync) {
1237 struct cp_control cpc;
1238
1239 cpc.reason = __get_cp_reason(sbi);
1240
1241 down_write(&sbi->gc_lock);
1242 err = f2fs_write_checkpoint(sbi, &cpc);
1243 up_write(&sbi->gc_lock);
1244 }
1245 f2fs_trace_ios(NULL, 1);
1246
1247 return err;
1248 }
1249
1250 static int f2fs_freeze(struct super_block *sb)
1251 {
1252 if (f2fs_readonly(sb))
1253 return 0;
1254
1255 /* IO error happened before */
1256 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1257 return -EIO;
1258
1259 /* must be clean, since sync_filesystem() was already called */
1260 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1261 return -EINVAL;
1262 return 0;
1263 }
1264
1265 static int f2fs_unfreeze(struct super_block *sb)
1266 {
1267 return 0;
1268 }
1269
1270 #ifdef CONFIG_QUOTA
1271 static int f2fs_statfs_project(struct super_block *sb,
1272 kprojid_t projid, struct kstatfs *buf)
1273 {
1274 struct kqid qid;
1275 struct dquot *dquot;
1276 u64 limit;
1277 u64 curblock;
1278
1279 qid = make_kqid_projid(projid);
1280 dquot = dqget(sb, qid);
1281 if (IS_ERR(dquot))
1282 return PTR_ERR(dquot);
1283 spin_lock(&dquot->dq_dqb_lock);
1284
1285 limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1286 dquot->dq_dqb.dqb_bhardlimit);
1287 if (limit)
1288 limit >>= sb->s_blocksize_bits;
1289
1290 if (limit && buf->f_blocks > limit) {
1291 curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
1292 buf->f_blocks = limit;
1293 buf->f_bfree = buf->f_bavail =
1294 (buf->f_blocks > curblock) ?
1295 (buf->f_blocks - curblock) : 0;
1296 }
1297
1298 limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1299 dquot->dq_dqb.dqb_ihardlimit);
1300
1301 if (limit && buf->f_files > limit) {
1302 buf->f_files = limit;
1303 buf->f_ffree =
1304 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1305 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1306 }
1307
1308 spin_unlock(&dquot->dq_dqb_lock);
1309 dqput(dquot);
1310 return 0;
1311 }
1312 #endif
1313
1314 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1315 {
1316 struct super_block *sb = dentry->d_sb;
1317 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1318 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1319 block_t total_count, user_block_count, start_count;
1320 u64 avail_node_count;
1321
1322 total_count = le64_to_cpu(sbi->raw_super->block_count);
1323 user_block_count = sbi->user_block_count;
1324 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1325 buf->f_type = F2FS_SUPER_MAGIC;
1326 buf->f_bsize = sbi->blocksize;
1327
1328 buf->f_blocks = total_count - start_count;
1329 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1330 sbi->current_reserved_blocks;
1331
1332 spin_lock(&sbi->stat_lock);
1333 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1334 buf->f_bfree = 0;
1335 else
1336 buf->f_bfree -= sbi->unusable_block_count;
1337 spin_unlock(&sbi->stat_lock);
1338
1339 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1340 buf->f_bavail = buf->f_bfree -
1341 F2FS_OPTION(sbi).root_reserved_blocks;
1342 else
1343 buf->f_bavail = 0;
1344
1345 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1346
1347 if (avail_node_count > user_block_count) {
1348 buf->f_files = user_block_count;
1349 buf->f_ffree = buf->f_bavail;
1350 } else {
1351 buf->f_files = avail_node_count;
1352 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1353 buf->f_bavail);
1354 }
1355
1356 buf->f_namelen = F2FS_NAME_LEN;
1357 buf->f_fsid.val[0] = (u32)id;
1358 buf->f_fsid.val[1] = (u32)(id >> 32);
1359
1360 #ifdef CONFIG_QUOTA
1361 if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1362 sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1363 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1364 }
1365 #endif
1366 return 0;
1367 }
1368
1369 static inline void f2fs_show_quota_options(struct seq_file *seq,
1370 struct super_block *sb)
1371 {
1372 #ifdef CONFIG_QUOTA
1373 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1374
1375 if (F2FS_OPTION(sbi).s_jquota_fmt) {
1376 char *fmtname = "";
1377
1378 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1379 case QFMT_VFS_OLD:
1380 fmtname = "vfsold";
1381 break;
1382 case QFMT_VFS_V0:
1383 fmtname = "vfsv0";
1384 break;
1385 case QFMT_VFS_V1:
1386 fmtname = "vfsv1";
1387 break;
1388 }
1389 seq_printf(seq, ",jqfmt=%s", fmtname);
1390 }
1391
1392 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1393 seq_show_option(seq, "usrjquota",
1394 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1395
1396 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1397 seq_show_option(seq, "grpjquota",
1398 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1399
1400 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1401 seq_show_option(seq, "prjjquota",
1402 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1403 #endif
1404 }
1405
1406 static inline void f2fs_show_compress_options(struct seq_file *seq,
1407 struct super_block *sb)
1408 {
1409 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1410 char *algtype = "";
1411 int i;
1412
1413 if (!f2fs_sb_has_compression(sbi))
1414 return;
1415
1416 switch (F2FS_OPTION(sbi).compress_algorithm) {
1417 case COMPRESS_LZO:
1418 algtype = "lzo";
1419 break;
1420 case COMPRESS_LZ4:
1421 algtype = "lz4";
1422 break;
1423 }
1424 seq_printf(seq, ",compress_algorithm=%s", algtype);
1425
1426 seq_printf(seq, ",compress_log_size=%u",
1427 F2FS_OPTION(sbi).compress_log_size);
1428
1429 for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1430 seq_printf(seq, ",compress_extension=%s",
1431 F2FS_OPTION(sbi).extensions[i]);
1432 }
1433 }
1434
1435 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1436 {
1437 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1438
1439 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
1440 if (test_opt(sbi, FORCE_FG_GC))
1441 seq_printf(seq, ",background_gc=%s", "sync");
1442 else
1443 seq_printf(seq, ",background_gc=%s", "on");
1444 } else {
1445 seq_printf(seq, ",background_gc=%s", "off");
1446 }
1447 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1448 seq_puts(seq, ",disable_roll_forward");
1449 if (test_opt(sbi, DISCARD))
1450 seq_puts(seq, ",discard");
1451 else
1452 seq_puts(seq, ",nodiscard");
1453 if (test_opt(sbi, NOHEAP))
1454 seq_puts(seq, ",no_heap");
1455 else
1456 seq_puts(seq, ",heap");
1457 #ifdef CONFIG_F2FS_FS_XATTR
1458 if (test_opt(sbi, XATTR_USER))
1459 seq_puts(seq, ",user_xattr");
1460 else
1461 seq_puts(seq, ",nouser_xattr");
1462 if (test_opt(sbi, INLINE_XATTR))
1463 seq_puts(seq, ",inline_xattr");
1464 else
1465 seq_puts(seq, ",noinline_xattr");
1466 if (test_opt(sbi, INLINE_XATTR_SIZE))
1467 seq_printf(seq, ",inline_xattr_size=%u",
1468 F2FS_OPTION(sbi).inline_xattr_size);
1469 #endif
1470 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1471 if (test_opt(sbi, POSIX_ACL))
1472 seq_puts(seq, ",acl");
1473 else
1474 seq_puts(seq, ",noacl");
1475 #endif
1476 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1477 seq_puts(seq, ",disable_ext_identify");
1478 if (test_opt(sbi, INLINE_DATA))
1479 seq_puts(seq, ",inline_data");
1480 else
1481 seq_puts(seq, ",noinline_data");
1482 if (test_opt(sbi, INLINE_DENTRY))
1483 seq_puts(seq, ",inline_dentry");
1484 else
1485 seq_puts(seq, ",noinline_dentry");
1486 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1487 seq_puts(seq, ",flush_merge");
1488 if (test_opt(sbi, NOBARRIER))
1489 seq_puts(seq, ",nobarrier");
1490 if (test_opt(sbi, FASTBOOT))
1491 seq_puts(seq, ",fastboot");
1492 if (test_opt(sbi, EXTENT_CACHE))
1493 seq_puts(seq, ",extent_cache");
1494 else
1495 seq_puts(seq, ",noextent_cache");
1496 if (test_opt(sbi, DATA_FLUSH))
1497 seq_puts(seq, ",data_flush");
1498
1499 seq_puts(seq, ",mode=");
1500 if (test_opt(sbi, ADAPTIVE))
1501 seq_puts(seq, "adaptive");
1502 else if (test_opt(sbi, LFS))
1503 seq_puts(seq, "lfs");
1504 seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1505 if (test_opt(sbi, RESERVE_ROOT))
1506 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1507 F2FS_OPTION(sbi).root_reserved_blocks,
1508 from_kuid_munged(&init_user_ns,
1509 F2FS_OPTION(sbi).s_resuid),
1510 from_kgid_munged(&init_user_ns,
1511 F2FS_OPTION(sbi).s_resgid));
1512 if (F2FS_IO_SIZE_BITS(sbi))
1513 seq_printf(seq, ",io_bits=%u",
1514 F2FS_OPTION(sbi).write_io_size_bits);
1515 #ifdef CONFIG_F2FS_FAULT_INJECTION
1516 if (test_opt(sbi, FAULT_INJECTION)) {
1517 seq_printf(seq, ",fault_injection=%u",
1518 F2FS_OPTION(sbi).fault_info.inject_rate);
1519 seq_printf(seq, ",fault_type=%u",
1520 F2FS_OPTION(sbi).fault_info.inject_type);
1521 }
1522 #endif
1523 #ifdef CONFIG_QUOTA
1524 if (test_opt(sbi, QUOTA))
1525 seq_puts(seq, ",quota");
1526 if (test_opt(sbi, USRQUOTA))
1527 seq_puts(seq, ",usrquota");
1528 if (test_opt(sbi, GRPQUOTA))
1529 seq_puts(seq, ",grpquota");
1530 if (test_opt(sbi, PRJQUOTA))
1531 seq_puts(seq, ",prjquota");
1532 #endif
1533 f2fs_show_quota_options(seq, sbi->sb);
1534 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1535 seq_printf(seq, ",whint_mode=%s", "user-based");
1536 else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1537 seq_printf(seq, ",whint_mode=%s", "fs-based");
1538 #ifdef CONFIG_FS_ENCRYPTION
1539 if (F2FS_OPTION(sbi).test_dummy_encryption)
1540 seq_puts(seq, ",test_dummy_encryption");
1541 #endif
1542
1543 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1544 seq_printf(seq, ",alloc_mode=%s", "default");
1545 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1546 seq_printf(seq, ",alloc_mode=%s", "reuse");
1547
1548 if (test_opt(sbi, DISABLE_CHECKPOINT))
1549 seq_printf(seq, ",checkpoint=disable:%u",
1550 F2FS_OPTION(sbi).unusable_cap);
1551 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1552 seq_printf(seq, ",fsync_mode=%s", "posix");
1553 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1554 seq_printf(seq, ",fsync_mode=%s", "strict");
1555 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1556 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1557
1558 f2fs_show_compress_options(seq, sbi->sb);
1559 return 0;
1560 }
1561
1562 static void default_options(struct f2fs_sb_info *sbi)
1563 {
1564 /* init some FS parameters */
1565 F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1566 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1567 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1568 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1569 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1570 F2FS_OPTION(sbi).test_dummy_encryption = false;
1571 F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1572 F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1573 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZO;
1574 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
1575 F2FS_OPTION(sbi).compress_ext_cnt = 0;
1576
1577 set_opt(sbi, BG_GC);
1578 set_opt(sbi, INLINE_XATTR);
1579 set_opt(sbi, INLINE_DATA);
1580 set_opt(sbi, INLINE_DENTRY);
1581 set_opt(sbi, EXTENT_CACHE);
1582 set_opt(sbi, NOHEAP);
1583 clear_opt(sbi, DISABLE_CHECKPOINT);
1584 F2FS_OPTION(sbi).unusable_cap = 0;
1585 sbi->sb->s_flags |= SB_LAZYTIME;
1586 set_opt(sbi, FLUSH_MERGE);
1587 set_opt(sbi, DISCARD);
1588 if (f2fs_sb_has_blkzoned(sbi))
1589 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1590 else
1591 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
1592
1593 #ifdef CONFIG_F2FS_FS_XATTR
1594 set_opt(sbi, XATTR_USER);
1595 #endif
1596 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1597 set_opt(sbi, POSIX_ACL);
1598 #endif
1599
1600 f2fs_build_fault_attr(sbi, 0, 0);
1601 }
1602
1603 #ifdef CONFIG_QUOTA
1604 static int f2fs_enable_quotas(struct super_block *sb);
1605 #endif
1606
1607 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1608 {
1609 unsigned int s_flags = sbi->sb->s_flags;
1610 struct cp_control cpc;
1611 int err = 0;
1612 int ret;
1613 block_t unusable;
1614
1615 if (s_flags & SB_RDONLY) {
1616 f2fs_err(sbi, "checkpoint=disable on readonly fs");
1617 return -EINVAL;
1618 }
1619 sbi->sb->s_flags |= SB_ACTIVE;
1620
1621 f2fs_update_time(sbi, DISABLE_TIME);
1622
1623 while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1624 down_write(&sbi->gc_lock);
1625 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1626 if (err == -ENODATA) {
1627 err = 0;
1628 break;
1629 }
1630 if (err && err != -EAGAIN)
1631 break;
1632 }
1633
1634 ret = sync_filesystem(sbi->sb);
1635 if (ret || err) {
1636 err = ret ? ret: err;
1637 goto restore_flag;
1638 }
1639
1640 unusable = f2fs_get_unusable_blocks(sbi);
1641 if (f2fs_disable_cp_again(sbi, unusable)) {
1642 err = -EAGAIN;
1643 goto restore_flag;
1644 }
1645
1646 down_write(&sbi->gc_lock);
1647 cpc.reason = CP_PAUSE;
1648 set_sbi_flag(sbi, SBI_CP_DISABLED);
1649 err = f2fs_write_checkpoint(sbi, &cpc);
1650 if (err)
1651 goto out_unlock;
1652
1653 spin_lock(&sbi->stat_lock);
1654 sbi->unusable_block_count = unusable;
1655 spin_unlock(&sbi->stat_lock);
1656
1657 out_unlock:
1658 up_write(&sbi->gc_lock);
1659 restore_flag:
1660 sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1661 return err;
1662 }
1663
1664 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1665 {
1666 down_write(&sbi->gc_lock);
1667 f2fs_dirty_to_prefree(sbi);
1668
1669 clear_sbi_flag(sbi, SBI_CP_DISABLED);
1670 set_sbi_flag(sbi, SBI_IS_DIRTY);
1671 up_write(&sbi->gc_lock);
1672
1673 f2fs_sync_fs(sbi->sb, 1);
1674 }
1675
1676 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1677 {
1678 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1679 struct f2fs_mount_info org_mount_opt;
1680 unsigned long old_sb_flags;
1681 int err;
1682 bool need_restart_gc = false;
1683 bool need_stop_gc = false;
1684 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1685 bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1686 bool no_io_align = !F2FS_IO_ALIGNED(sbi);
1687 bool checkpoint_changed;
1688 #ifdef CONFIG_QUOTA
1689 int i, j;
1690 #endif
1691
1692 /*
1693 * Save the old mount options in case we
1694 * need to restore them.
1695 */
1696 org_mount_opt = sbi->mount_opt;
1697 old_sb_flags = sb->s_flags;
1698
1699 #ifdef CONFIG_QUOTA
1700 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1701 for (i = 0; i < MAXQUOTAS; i++) {
1702 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1703 org_mount_opt.s_qf_names[i] =
1704 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1705 GFP_KERNEL);
1706 if (!org_mount_opt.s_qf_names[i]) {
1707 for (j = 0; j < i; j++)
1708 kvfree(org_mount_opt.s_qf_names[j]);
1709 return -ENOMEM;
1710 }
1711 } else {
1712 org_mount_opt.s_qf_names[i] = NULL;
1713 }
1714 }
1715 #endif
1716
1717 /* recover superblocks we couldn't write due to previous RO mount */
1718 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1719 err = f2fs_commit_super(sbi, false);
1720 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
1721 err);
1722 if (!err)
1723 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1724 }
1725
1726 default_options(sbi);
1727
1728 /* parse mount options */
1729 err = parse_options(sb, data);
1730 if (err)
1731 goto restore_opts;
1732 checkpoint_changed =
1733 disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1734
1735 /*
1736 * Previous and new state of filesystem is RO,
1737 * so skip checking GC and FLUSH_MERGE conditions.
1738 */
1739 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1740 goto skip;
1741
1742 #ifdef CONFIG_QUOTA
1743 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1744 err = dquot_suspend(sb, -1);
1745 if (err < 0)
1746 goto restore_opts;
1747 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1748 /* dquot_resume needs RW */
1749 sb->s_flags &= ~SB_RDONLY;
1750 if (sb_any_quota_suspended(sb)) {
1751 dquot_resume(sb, -1);
1752 } else if (f2fs_sb_has_quota_ino(sbi)) {
1753 err = f2fs_enable_quotas(sb);
1754 if (err)
1755 goto restore_opts;
1756 }
1757 }
1758 #endif
1759 /* disallow enable/disable extent_cache dynamically */
1760 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1761 err = -EINVAL;
1762 f2fs_warn(sbi, "switch extent_cache option is not allowed");
1763 goto restore_opts;
1764 }
1765
1766 if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
1767 err = -EINVAL;
1768 f2fs_warn(sbi, "switch io_bits option is not allowed");
1769 goto restore_opts;
1770 }
1771
1772 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1773 err = -EINVAL;
1774 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
1775 goto restore_opts;
1776 }
1777
1778 /*
1779 * We stop the GC thread if FS is mounted as RO
1780 * or if background_gc = off is passed in mount
1781 * option. Also sync the filesystem.
1782 */
1783 if ((*flags & SB_RDONLY) || !test_opt(sbi, BG_GC)) {
1784 if (sbi->gc_thread) {
1785 f2fs_stop_gc_thread(sbi);
1786 need_restart_gc = true;
1787 }
1788 } else if (!sbi->gc_thread) {
1789 err = f2fs_start_gc_thread(sbi);
1790 if (err)
1791 goto restore_opts;
1792 need_stop_gc = true;
1793 }
1794
1795 if (*flags & SB_RDONLY ||
1796 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1797 writeback_inodes_sb(sb, WB_REASON_SYNC);
1798 sync_inodes_sb(sb);
1799
1800 set_sbi_flag(sbi, SBI_IS_DIRTY);
1801 set_sbi_flag(sbi, SBI_IS_CLOSE);
1802 f2fs_sync_fs(sb, 1);
1803 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1804 }
1805
1806 if (checkpoint_changed) {
1807 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1808 err = f2fs_disable_checkpoint(sbi);
1809 if (err)
1810 goto restore_gc;
1811 } else {
1812 f2fs_enable_checkpoint(sbi);
1813 }
1814 }
1815
1816 /*
1817 * We stop issue flush thread if FS is mounted as RO
1818 * or if flush_merge is not passed in mount option.
1819 */
1820 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1821 clear_opt(sbi, FLUSH_MERGE);
1822 f2fs_destroy_flush_cmd_control(sbi, false);
1823 } else {
1824 err = f2fs_create_flush_cmd_control(sbi);
1825 if (err)
1826 goto restore_gc;
1827 }
1828 skip:
1829 #ifdef CONFIG_QUOTA
1830 /* Release old quota file names */
1831 for (i = 0; i < MAXQUOTAS; i++)
1832 kvfree(org_mount_opt.s_qf_names[i]);
1833 #endif
1834 /* Update the POSIXACL Flag */
1835 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1836 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1837
1838 limit_reserve_root(sbi);
1839 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1840 return 0;
1841 restore_gc:
1842 if (need_restart_gc) {
1843 if (f2fs_start_gc_thread(sbi))
1844 f2fs_warn(sbi, "background gc thread has stopped");
1845 } else if (need_stop_gc) {
1846 f2fs_stop_gc_thread(sbi);
1847 }
1848 restore_opts:
1849 #ifdef CONFIG_QUOTA
1850 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1851 for (i = 0; i < MAXQUOTAS; i++) {
1852 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1853 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1854 }
1855 #endif
1856 sbi->mount_opt = org_mount_opt;
1857 sb->s_flags = old_sb_flags;
1858 return err;
1859 }
1860
1861 #ifdef CONFIG_QUOTA
1862 /* Read data from quotafile */
1863 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1864 size_t len, loff_t off)
1865 {
1866 struct inode *inode = sb_dqopt(sb)->files[type];
1867 struct address_space *mapping = inode->i_mapping;
1868 block_t blkidx = F2FS_BYTES_TO_BLK(off);
1869 int offset = off & (sb->s_blocksize - 1);
1870 int tocopy;
1871 size_t toread;
1872 loff_t i_size = i_size_read(inode);
1873 struct page *page;
1874 char *kaddr;
1875
1876 if (off > i_size)
1877 return 0;
1878
1879 if (off + len > i_size)
1880 len = i_size - off;
1881 toread = len;
1882 while (toread > 0) {
1883 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1884 repeat:
1885 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1886 if (IS_ERR(page)) {
1887 if (PTR_ERR(page) == -ENOMEM) {
1888 congestion_wait(BLK_RW_ASYNC, HZ/50);
1889 goto repeat;
1890 }
1891 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1892 return PTR_ERR(page);
1893 }
1894
1895 lock_page(page);
1896
1897 if (unlikely(page->mapping != mapping)) {
1898 f2fs_put_page(page, 1);
1899 goto repeat;
1900 }
1901 if (unlikely(!PageUptodate(page))) {
1902 f2fs_put_page(page, 1);
1903 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1904 return -EIO;
1905 }
1906
1907 kaddr = kmap_atomic(page);
1908 memcpy(data, kaddr + offset, tocopy);
1909 kunmap_atomic(kaddr);
1910 f2fs_put_page(page, 1);
1911
1912 offset = 0;
1913 toread -= tocopy;
1914 data += tocopy;
1915 blkidx++;
1916 }
1917 return len;
1918 }
1919
1920 /* Write to quotafile */
1921 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
1922 const char *data, size_t len, loff_t off)
1923 {
1924 struct inode *inode = sb_dqopt(sb)->files[type];
1925 struct address_space *mapping = inode->i_mapping;
1926 const struct address_space_operations *a_ops = mapping->a_ops;
1927 int offset = off & (sb->s_blocksize - 1);
1928 size_t towrite = len;
1929 struct page *page;
1930 char *kaddr;
1931 int err = 0;
1932 int tocopy;
1933
1934 while (towrite > 0) {
1935 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
1936 towrite);
1937 retry:
1938 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
1939 &page, NULL);
1940 if (unlikely(err)) {
1941 if (err == -ENOMEM) {
1942 congestion_wait(BLK_RW_ASYNC, HZ/50);
1943 goto retry;
1944 }
1945 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1946 break;
1947 }
1948
1949 kaddr = kmap_atomic(page);
1950 memcpy(kaddr + offset, data, tocopy);
1951 kunmap_atomic(kaddr);
1952 flush_dcache_page(page);
1953
1954 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
1955 page, NULL);
1956 offset = 0;
1957 towrite -= tocopy;
1958 off += tocopy;
1959 data += tocopy;
1960 cond_resched();
1961 }
1962
1963 if (len == towrite)
1964 return err;
1965 inode->i_mtime = inode->i_ctime = current_time(inode);
1966 f2fs_mark_inode_dirty_sync(inode, false);
1967 return len - towrite;
1968 }
1969
1970 static struct dquot **f2fs_get_dquots(struct inode *inode)
1971 {
1972 return F2FS_I(inode)->i_dquot;
1973 }
1974
1975 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
1976 {
1977 return &F2FS_I(inode)->i_reserved_quota;
1978 }
1979
1980 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
1981 {
1982 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
1983 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
1984 return 0;
1985 }
1986
1987 return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
1988 F2FS_OPTION(sbi).s_jquota_fmt, type);
1989 }
1990
1991 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
1992 {
1993 int enabled = 0;
1994 int i, err;
1995
1996 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
1997 err = f2fs_enable_quotas(sbi->sb);
1998 if (err) {
1999 f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2000 return 0;
2001 }
2002 return 1;
2003 }
2004
2005 for (i = 0; i < MAXQUOTAS; i++) {
2006 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2007 err = f2fs_quota_on_mount(sbi, i);
2008 if (!err) {
2009 enabled = 1;
2010 continue;
2011 }
2012 f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2013 err, i);
2014 }
2015 }
2016 return enabled;
2017 }
2018
2019 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2020 unsigned int flags)
2021 {
2022 struct inode *qf_inode;
2023 unsigned long qf_inum;
2024 int err;
2025
2026 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2027
2028 qf_inum = f2fs_qf_ino(sb, type);
2029 if (!qf_inum)
2030 return -EPERM;
2031
2032 qf_inode = f2fs_iget(sb, qf_inum);
2033 if (IS_ERR(qf_inode)) {
2034 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2035 return PTR_ERR(qf_inode);
2036 }
2037
2038 /* Don't account quota for quota files to avoid recursion */
2039 qf_inode->i_flags |= S_NOQUOTA;
2040 err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2041 iput(qf_inode);
2042 return err;
2043 }
2044
2045 static int f2fs_enable_quotas(struct super_block *sb)
2046 {
2047 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2048 int type, err = 0;
2049 unsigned long qf_inum;
2050 bool quota_mopt[MAXQUOTAS] = {
2051 test_opt(sbi, USRQUOTA),
2052 test_opt(sbi, GRPQUOTA),
2053 test_opt(sbi, PRJQUOTA),
2054 };
2055
2056 if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2057 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2058 return 0;
2059 }
2060
2061 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2062
2063 for (type = 0; type < MAXQUOTAS; type++) {
2064 qf_inum = f2fs_qf_ino(sb, type);
2065 if (qf_inum) {
2066 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2067 DQUOT_USAGE_ENABLED |
2068 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2069 if (err) {
2070 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2071 type, err);
2072 for (type--; type >= 0; type--)
2073 dquot_quota_off(sb, type);
2074 set_sbi_flag(F2FS_SB(sb),
2075 SBI_QUOTA_NEED_REPAIR);
2076 return err;
2077 }
2078 }
2079 }
2080 return 0;
2081 }
2082
2083 int f2fs_quota_sync(struct super_block *sb, int type)
2084 {
2085 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2086 struct quota_info *dqopt = sb_dqopt(sb);
2087 int cnt;
2088 int ret;
2089
2090 /*
2091 * do_quotactl
2092 * f2fs_quota_sync
2093 * down_read(quota_sem)
2094 * dquot_writeback_dquots()
2095 * f2fs_dquot_commit
2096 * block_operation
2097 * down_read(quota_sem)
2098 */
2099 f2fs_lock_op(sbi);
2100
2101 down_read(&sbi->quota_sem);
2102 ret = dquot_writeback_dquots(sb, type);
2103 if (ret)
2104 goto out;
2105
2106 /*
2107 * Now when everything is written we can discard the pagecache so
2108 * that userspace sees the changes.
2109 */
2110 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2111 struct address_space *mapping;
2112
2113 if (type != -1 && cnt != type)
2114 continue;
2115 if (!sb_has_quota_active(sb, cnt))
2116 continue;
2117
2118 mapping = dqopt->files[cnt]->i_mapping;
2119
2120 ret = filemap_fdatawrite(mapping);
2121 if (ret)
2122 goto out;
2123
2124 /* if we are using journalled quota */
2125 if (is_journalled_quota(sbi))
2126 continue;
2127
2128 ret = filemap_fdatawait(mapping);
2129 if (ret)
2130 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2131
2132 inode_lock(dqopt->files[cnt]);
2133 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
2134 inode_unlock(dqopt->files[cnt]);
2135 }
2136 out:
2137 if (ret)
2138 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2139 up_read(&sbi->quota_sem);
2140 f2fs_unlock_op(sbi);
2141 return ret;
2142 }
2143
2144 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2145 const struct path *path)
2146 {
2147 struct inode *inode;
2148 int err;
2149
2150 /* if quota sysfile exists, deny enabling quota with specific file */
2151 if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2152 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2153 return -EBUSY;
2154 }
2155
2156 err = f2fs_quota_sync(sb, type);
2157 if (err)
2158 return err;
2159
2160 err = dquot_quota_on(sb, type, format_id, path);
2161 if (err)
2162 return err;
2163
2164 inode = d_inode(path->dentry);
2165
2166 inode_lock(inode);
2167 F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2168 f2fs_set_inode_flags(inode);
2169 inode_unlock(inode);
2170 f2fs_mark_inode_dirty_sync(inode, false);
2171
2172 return 0;
2173 }
2174
2175 static int __f2fs_quota_off(struct super_block *sb, int type)
2176 {
2177 struct inode *inode = sb_dqopt(sb)->files[type];
2178 int err;
2179
2180 if (!inode || !igrab(inode))
2181 return dquot_quota_off(sb, type);
2182
2183 err = f2fs_quota_sync(sb, type);
2184 if (err)
2185 goto out_put;
2186
2187 err = dquot_quota_off(sb, type);
2188 if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2189 goto out_put;
2190
2191 inode_lock(inode);
2192 F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2193 f2fs_set_inode_flags(inode);
2194 inode_unlock(inode);
2195 f2fs_mark_inode_dirty_sync(inode, false);
2196 out_put:
2197 iput(inode);
2198 return err;
2199 }
2200
2201 static int f2fs_quota_off(struct super_block *sb, int type)
2202 {
2203 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2204 int err;
2205
2206 err = __f2fs_quota_off(sb, type);
2207
2208 /*
2209 * quotactl can shutdown journalled quota, result in inconsistence
2210 * between quota record and fs data by following updates, tag the
2211 * flag to let fsck be aware of it.
2212 */
2213 if (is_journalled_quota(sbi))
2214 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2215 return err;
2216 }
2217
2218 void f2fs_quota_off_umount(struct super_block *sb)
2219 {
2220 int type;
2221 int err;
2222
2223 for (type = 0; type < MAXQUOTAS; type++) {
2224 err = __f2fs_quota_off(sb, type);
2225 if (err) {
2226 int ret = dquot_quota_off(sb, type);
2227
2228 f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2229 type, err, ret);
2230 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2231 }
2232 }
2233 /*
2234 * In case of checkpoint=disable, we must flush quota blocks.
2235 * This can cause NULL exception for node_inode in end_io, since
2236 * put_super already dropped it.
2237 */
2238 sync_filesystem(sb);
2239 }
2240
2241 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2242 {
2243 struct quota_info *dqopt = sb_dqopt(sb);
2244 int type;
2245
2246 for (type = 0; type < MAXQUOTAS; type++) {
2247 if (!dqopt->files[type])
2248 continue;
2249 f2fs_inode_synced(dqopt->files[type]);
2250 }
2251 }
2252
2253 static int f2fs_dquot_commit(struct dquot *dquot)
2254 {
2255 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2256 int ret;
2257
2258 down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2259 ret = dquot_commit(dquot);
2260 if (ret < 0)
2261 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2262 up_read(&sbi->quota_sem);
2263 return ret;
2264 }
2265
2266 static int f2fs_dquot_acquire(struct dquot *dquot)
2267 {
2268 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2269 int ret;
2270
2271 down_read(&sbi->quota_sem);
2272 ret = dquot_acquire(dquot);
2273 if (ret < 0)
2274 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2275 up_read(&sbi->quota_sem);
2276 return ret;
2277 }
2278
2279 static int f2fs_dquot_release(struct dquot *dquot)
2280 {
2281 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2282 int ret = dquot_release(dquot);
2283
2284 if (ret < 0)
2285 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2286 return ret;
2287 }
2288
2289 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2290 {
2291 struct super_block *sb = dquot->dq_sb;
2292 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2293 int ret = dquot_mark_dquot_dirty(dquot);
2294
2295 /* if we are using journalled quota */
2296 if (is_journalled_quota(sbi))
2297 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2298
2299 return ret;
2300 }
2301
2302 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2303 {
2304 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2305 int ret = dquot_commit_info(sb, type);
2306
2307 if (ret < 0)
2308 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2309 return ret;
2310 }
2311
2312 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2313 {
2314 *projid = F2FS_I(inode)->i_projid;
2315 return 0;
2316 }
2317
2318 static const struct dquot_operations f2fs_quota_operations = {
2319 .get_reserved_space = f2fs_get_reserved_space,
2320 .write_dquot = f2fs_dquot_commit,
2321 .acquire_dquot = f2fs_dquot_acquire,
2322 .release_dquot = f2fs_dquot_release,
2323 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
2324 .write_info = f2fs_dquot_commit_info,
2325 .alloc_dquot = dquot_alloc,
2326 .destroy_dquot = dquot_destroy,
2327 .get_projid = f2fs_get_projid,
2328 .get_next_id = dquot_get_next_id,
2329 };
2330
2331 static const struct quotactl_ops f2fs_quotactl_ops = {
2332 .quota_on = f2fs_quota_on,
2333 .quota_off = f2fs_quota_off,
2334 .quota_sync = f2fs_quota_sync,
2335 .get_state = dquot_get_state,
2336 .set_info = dquot_set_dqinfo,
2337 .get_dqblk = dquot_get_dqblk,
2338 .set_dqblk = dquot_set_dqblk,
2339 .get_nextdqblk = dquot_get_next_dqblk,
2340 };
2341 #else
2342 int f2fs_quota_sync(struct super_block *sb, int type)
2343 {
2344 return 0;
2345 }
2346
2347 void f2fs_quota_off_umount(struct super_block *sb)
2348 {
2349 }
2350 #endif
2351
2352 static const struct super_operations f2fs_sops = {
2353 .alloc_inode = f2fs_alloc_inode,
2354 .free_inode = f2fs_free_inode,
2355 .drop_inode = f2fs_drop_inode,
2356 .write_inode = f2fs_write_inode,
2357 .dirty_inode = f2fs_dirty_inode,
2358 .show_options = f2fs_show_options,
2359 #ifdef CONFIG_QUOTA
2360 .quota_read = f2fs_quota_read,
2361 .quota_write = f2fs_quota_write,
2362 .get_dquots = f2fs_get_dquots,
2363 #endif
2364 .evict_inode = f2fs_evict_inode,
2365 .put_super = f2fs_put_super,
2366 .sync_fs = f2fs_sync_fs,
2367 .freeze_fs = f2fs_freeze,
2368 .unfreeze_fs = f2fs_unfreeze,
2369 .statfs = f2fs_statfs,
2370 .remount_fs = f2fs_remount,
2371 };
2372
2373 #ifdef CONFIG_FS_ENCRYPTION
2374 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2375 {
2376 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2377 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2378 ctx, len, NULL);
2379 }
2380
2381 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2382 void *fs_data)
2383 {
2384 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2385
2386 /*
2387 * Encrypting the root directory is not allowed because fsck
2388 * expects lost+found directory to exist and remain unencrypted
2389 * if LOST_FOUND feature is enabled.
2390 *
2391 */
2392 if (f2fs_sb_has_lost_found(sbi) &&
2393 inode->i_ino == F2FS_ROOT_INO(sbi))
2394 return -EPERM;
2395
2396 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2397 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2398 ctx, len, fs_data, XATTR_CREATE);
2399 }
2400
2401 static bool f2fs_dummy_context(struct inode *inode)
2402 {
2403 return DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(inode));
2404 }
2405
2406 static bool f2fs_has_stable_inodes(struct super_block *sb)
2407 {
2408 return true;
2409 }
2410
2411 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
2412 int *ino_bits_ret, int *lblk_bits_ret)
2413 {
2414 *ino_bits_ret = 8 * sizeof(nid_t);
2415 *lblk_bits_ret = 8 * sizeof(block_t);
2416 }
2417
2418 static const struct fscrypt_operations f2fs_cryptops = {
2419 .key_prefix = "f2fs:",
2420 .get_context = f2fs_get_context,
2421 .set_context = f2fs_set_context,
2422 .dummy_context = f2fs_dummy_context,
2423 .empty_dir = f2fs_empty_dir,
2424 .max_namelen = F2FS_NAME_LEN,
2425 .has_stable_inodes = f2fs_has_stable_inodes,
2426 .get_ino_and_lblk_bits = f2fs_get_ino_and_lblk_bits,
2427 };
2428 #endif
2429
2430 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2431 u64 ino, u32 generation)
2432 {
2433 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2434 struct inode *inode;
2435
2436 if (f2fs_check_nid_range(sbi, ino))
2437 return ERR_PTR(-ESTALE);
2438
2439 /*
2440 * f2fs_iget isn't quite right if the inode is currently unallocated!
2441 * However f2fs_iget currently does appropriate checks to handle stale
2442 * inodes so everything is OK.
2443 */
2444 inode = f2fs_iget(sb, ino);
2445 if (IS_ERR(inode))
2446 return ERR_CAST(inode);
2447 if (unlikely(generation && inode->i_generation != generation)) {
2448 /* we didn't find the right inode.. */
2449 iput(inode);
2450 return ERR_PTR(-ESTALE);
2451 }
2452 return inode;
2453 }
2454
2455 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2456 int fh_len, int fh_type)
2457 {
2458 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2459 f2fs_nfs_get_inode);
2460 }
2461
2462 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2463 int fh_len, int fh_type)
2464 {
2465 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2466 f2fs_nfs_get_inode);
2467 }
2468
2469 static const struct export_operations f2fs_export_ops = {
2470 .fh_to_dentry = f2fs_fh_to_dentry,
2471 .fh_to_parent = f2fs_fh_to_parent,
2472 .get_parent = f2fs_get_parent,
2473 };
2474
2475 static loff_t max_file_blocks(void)
2476 {
2477 loff_t result = 0;
2478 loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2479
2480 /*
2481 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2482 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2483 * space in inode.i_addr, it will be more safe to reassign
2484 * result as zero.
2485 */
2486
2487 /* two direct node blocks */
2488 result += (leaf_count * 2);
2489
2490 /* two indirect node blocks */
2491 leaf_count *= NIDS_PER_BLOCK;
2492 result += (leaf_count * 2);
2493
2494 /* one double indirect node block */
2495 leaf_count *= NIDS_PER_BLOCK;
2496 result += leaf_count;
2497
2498 return result;
2499 }
2500
2501 static int __f2fs_commit_super(struct buffer_head *bh,
2502 struct f2fs_super_block *super)
2503 {
2504 lock_buffer(bh);
2505 if (super)
2506 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2507 set_buffer_dirty(bh);
2508 unlock_buffer(bh);
2509
2510 /* it's rare case, we can do fua all the time */
2511 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2512 }
2513
2514 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2515 struct buffer_head *bh)
2516 {
2517 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2518 (bh->b_data + F2FS_SUPER_OFFSET);
2519 struct super_block *sb = sbi->sb;
2520 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2521 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2522 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2523 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2524 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2525 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2526 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2527 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2528 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2529 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2530 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2531 u32 segment_count = le32_to_cpu(raw_super->segment_count);
2532 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2533 u64 main_end_blkaddr = main_blkaddr +
2534 (segment_count_main << log_blocks_per_seg);
2535 u64 seg_end_blkaddr = segment0_blkaddr +
2536 (segment_count << log_blocks_per_seg);
2537
2538 if (segment0_blkaddr != cp_blkaddr) {
2539 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2540 segment0_blkaddr, cp_blkaddr);
2541 return true;
2542 }
2543
2544 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2545 sit_blkaddr) {
2546 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2547 cp_blkaddr, sit_blkaddr,
2548 segment_count_ckpt << log_blocks_per_seg);
2549 return true;
2550 }
2551
2552 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2553 nat_blkaddr) {
2554 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2555 sit_blkaddr, nat_blkaddr,
2556 segment_count_sit << log_blocks_per_seg);
2557 return true;
2558 }
2559
2560 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2561 ssa_blkaddr) {
2562 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2563 nat_blkaddr, ssa_blkaddr,
2564 segment_count_nat << log_blocks_per_seg);
2565 return true;
2566 }
2567
2568 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2569 main_blkaddr) {
2570 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2571 ssa_blkaddr, main_blkaddr,
2572 segment_count_ssa << log_blocks_per_seg);
2573 return true;
2574 }
2575
2576 if (main_end_blkaddr > seg_end_blkaddr) {
2577 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
2578 main_blkaddr,
2579 segment0_blkaddr +
2580 (segment_count << log_blocks_per_seg),
2581 segment_count_main << log_blocks_per_seg);
2582 return true;
2583 } else if (main_end_blkaddr < seg_end_blkaddr) {
2584 int err = 0;
2585 char *res;
2586
2587 /* fix in-memory information all the time */
2588 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2589 segment0_blkaddr) >> log_blocks_per_seg);
2590
2591 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2592 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2593 res = "internally";
2594 } else {
2595 err = __f2fs_commit_super(bh, NULL);
2596 res = err ? "failed" : "done";
2597 }
2598 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
2599 res, main_blkaddr,
2600 segment0_blkaddr +
2601 (segment_count << log_blocks_per_seg),
2602 segment_count_main << log_blocks_per_seg);
2603 if (err)
2604 return true;
2605 }
2606 return false;
2607 }
2608
2609 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2610 struct buffer_head *bh)
2611 {
2612 block_t segment_count, segs_per_sec, secs_per_zone;
2613 block_t total_sections, blocks_per_seg;
2614 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2615 (bh->b_data + F2FS_SUPER_OFFSET);
2616 unsigned int blocksize;
2617 size_t crc_offset = 0;
2618 __u32 crc = 0;
2619
2620 if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
2621 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
2622 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2623 return -EINVAL;
2624 }
2625
2626 /* Check checksum_offset and crc in superblock */
2627 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2628 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2629 if (crc_offset !=
2630 offsetof(struct f2fs_super_block, crc)) {
2631 f2fs_info(sbi, "Invalid SB checksum offset: %zu",
2632 crc_offset);
2633 return -EFSCORRUPTED;
2634 }
2635 crc = le32_to_cpu(raw_super->crc);
2636 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2637 f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
2638 return -EFSCORRUPTED;
2639 }
2640 }
2641
2642 /* Currently, support only 4KB page cache size */
2643 if (F2FS_BLKSIZE != PAGE_SIZE) {
2644 f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
2645 PAGE_SIZE);
2646 return -EFSCORRUPTED;
2647 }
2648
2649 /* Currently, support only 4KB block size */
2650 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2651 if (blocksize != F2FS_BLKSIZE) {
2652 f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
2653 blocksize);
2654 return -EFSCORRUPTED;
2655 }
2656
2657 /* check log blocks per segment */
2658 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2659 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
2660 le32_to_cpu(raw_super->log_blocks_per_seg));
2661 return -EFSCORRUPTED;
2662 }
2663
2664 /* Currently, support 512/1024/2048/4096 bytes sector size */
2665 if (le32_to_cpu(raw_super->log_sectorsize) >
2666 F2FS_MAX_LOG_SECTOR_SIZE ||
2667 le32_to_cpu(raw_super->log_sectorsize) <
2668 F2FS_MIN_LOG_SECTOR_SIZE) {
2669 f2fs_info(sbi, "Invalid log sectorsize (%u)",
2670 le32_to_cpu(raw_super->log_sectorsize));
2671 return -EFSCORRUPTED;
2672 }
2673 if (le32_to_cpu(raw_super->log_sectors_per_block) +
2674 le32_to_cpu(raw_super->log_sectorsize) !=
2675 F2FS_MAX_LOG_SECTOR_SIZE) {
2676 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
2677 le32_to_cpu(raw_super->log_sectors_per_block),
2678 le32_to_cpu(raw_super->log_sectorsize));
2679 return -EFSCORRUPTED;
2680 }
2681
2682 segment_count = le32_to_cpu(raw_super->segment_count);
2683 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2684 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2685 total_sections = le32_to_cpu(raw_super->section_count);
2686
2687 /* blocks_per_seg should be 512, given the above check */
2688 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2689
2690 if (segment_count > F2FS_MAX_SEGMENT ||
2691 segment_count < F2FS_MIN_SEGMENTS) {
2692 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
2693 return -EFSCORRUPTED;
2694 }
2695
2696 if (total_sections > segment_count ||
2697 total_sections < F2FS_MIN_SEGMENTS ||
2698 segs_per_sec > segment_count || !segs_per_sec) {
2699 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
2700 segment_count, total_sections, segs_per_sec);
2701 return -EFSCORRUPTED;
2702 }
2703
2704 if ((segment_count / segs_per_sec) < total_sections) {
2705 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
2706 segment_count, segs_per_sec, total_sections);
2707 return -EFSCORRUPTED;
2708 }
2709
2710 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2711 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
2712 segment_count, le64_to_cpu(raw_super->block_count));
2713 return -EFSCORRUPTED;
2714 }
2715
2716 if (RDEV(0).path[0]) {
2717 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
2718 int i = 1;
2719
2720 while (i < MAX_DEVICES && RDEV(i).path[0]) {
2721 dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
2722 i++;
2723 }
2724 if (segment_count != dev_seg_count) {
2725 f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
2726 segment_count, dev_seg_count);
2727 return -EFSCORRUPTED;
2728 }
2729 }
2730
2731 if (secs_per_zone > total_sections || !secs_per_zone) {
2732 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
2733 secs_per_zone, total_sections);
2734 return -EFSCORRUPTED;
2735 }
2736 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2737 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2738 (le32_to_cpu(raw_super->extension_count) +
2739 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2740 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
2741 le32_to_cpu(raw_super->extension_count),
2742 raw_super->hot_ext_count,
2743 F2FS_MAX_EXTENSION);
2744 return -EFSCORRUPTED;
2745 }
2746
2747 if (le32_to_cpu(raw_super->cp_payload) >
2748 (blocks_per_seg - F2FS_CP_PACKS)) {
2749 f2fs_info(sbi, "Insane cp_payload (%u > %u)",
2750 le32_to_cpu(raw_super->cp_payload),
2751 blocks_per_seg - F2FS_CP_PACKS);
2752 return -EFSCORRUPTED;
2753 }
2754
2755 /* check reserved ino info */
2756 if (le32_to_cpu(raw_super->node_ino) != 1 ||
2757 le32_to_cpu(raw_super->meta_ino) != 2 ||
2758 le32_to_cpu(raw_super->root_ino) != 3) {
2759 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2760 le32_to_cpu(raw_super->node_ino),
2761 le32_to_cpu(raw_super->meta_ino),
2762 le32_to_cpu(raw_super->root_ino));
2763 return -EFSCORRUPTED;
2764 }
2765
2766 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2767 if (sanity_check_area_boundary(sbi, bh))
2768 return -EFSCORRUPTED;
2769
2770 return 0;
2771 }
2772
2773 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2774 {
2775 unsigned int total, fsmeta;
2776 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2777 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2778 unsigned int ovp_segments, reserved_segments;
2779 unsigned int main_segs, blocks_per_seg;
2780 unsigned int sit_segs, nat_segs;
2781 unsigned int sit_bitmap_size, nat_bitmap_size;
2782 unsigned int log_blocks_per_seg;
2783 unsigned int segment_count_main;
2784 unsigned int cp_pack_start_sum, cp_payload;
2785 block_t user_block_count, valid_user_blocks;
2786 block_t avail_node_count, valid_node_count;
2787 int i, j;
2788
2789 total = le32_to_cpu(raw_super->segment_count);
2790 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2791 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2792 fsmeta += sit_segs;
2793 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2794 fsmeta += nat_segs;
2795 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2796 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2797
2798 if (unlikely(fsmeta >= total))
2799 return 1;
2800
2801 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2802 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2803
2804 if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2805 ovp_segments == 0 || reserved_segments == 0)) {
2806 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
2807 return 1;
2808 }
2809
2810 user_block_count = le64_to_cpu(ckpt->user_block_count);
2811 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2812 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2813 if (!user_block_count || user_block_count >=
2814 segment_count_main << log_blocks_per_seg) {
2815 f2fs_err(sbi, "Wrong user_block_count: %u",
2816 user_block_count);
2817 return 1;
2818 }
2819
2820 valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2821 if (valid_user_blocks > user_block_count) {
2822 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
2823 valid_user_blocks, user_block_count);
2824 return 1;
2825 }
2826
2827 valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2828 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
2829 if (valid_node_count > avail_node_count) {
2830 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
2831 valid_node_count, avail_node_count);
2832 return 1;
2833 }
2834
2835 main_segs = le32_to_cpu(raw_super->segment_count_main);
2836 blocks_per_seg = sbi->blocks_per_seg;
2837
2838 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2839 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2840 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2841 return 1;
2842 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2843 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2844 le32_to_cpu(ckpt->cur_node_segno[j])) {
2845 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
2846 i, j,
2847 le32_to_cpu(ckpt->cur_node_segno[i]));
2848 return 1;
2849 }
2850 }
2851 }
2852 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2853 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2854 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2855 return 1;
2856 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2857 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2858 le32_to_cpu(ckpt->cur_data_segno[j])) {
2859 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
2860 i, j,
2861 le32_to_cpu(ckpt->cur_data_segno[i]));
2862 return 1;
2863 }
2864 }
2865 }
2866 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2867 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
2868 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2869 le32_to_cpu(ckpt->cur_data_segno[j])) {
2870 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
2871 i, j,
2872 le32_to_cpu(ckpt->cur_node_segno[i]));
2873 return 1;
2874 }
2875 }
2876 }
2877
2878 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2879 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2880
2881 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2882 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2883 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
2884 sit_bitmap_size, nat_bitmap_size);
2885 return 1;
2886 }
2887
2888 cp_pack_start_sum = __start_sum_addr(sbi);
2889 cp_payload = __cp_payload(sbi);
2890 if (cp_pack_start_sum < cp_payload + 1 ||
2891 cp_pack_start_sum > blocks_per_seg - 1 -
2892 NR_CURSEG_TYPE) {
2893 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
2894 cp_pack_start_sum);
2895 return 1;
2896 }
2897
2898 if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
2899 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
2900 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
2901 "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
2902 "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
2903 le32_to_cpu(ckpt->checksum_offset));
2904 return 1;
2905 }
2906
2907 if (unlikely(f2fs_cp_error(sbi))) {
2908 f2fs_err(sbi, "A bug case: need to run fsck");
2909 return 1;
2910 }
2911 return 0;
2912 }
2913
2914 static void init_sb_info(struct f2fs_sb_info *sbi)
2915 {
2916 struct f2fs_super_block *raw_super = sbi->raw_super;
2917 int i;
2918
2919 sbi->log_sectors_per_block =
2920 le32_to_cpu(raw_super->log_sectors_per_block);
2921 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
2922 sbi->blocksize = 1 << sbi->log_blocksize;
2923 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2924 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
2925 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2926 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2927 sbi->total_sections = le32_to_cpu(raw_super->section_count);
2928 sbi->total_node_count =
2929 (le32_to_cpu(raw_super->segment_count_nat) / 2)
2930 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
2931 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
2932 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
2933 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
2934 sbi->cur_victim_sec = NULL_SECNO;
2935 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
2936 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
2937 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
2938 sbi->migration_granularity = sbi->segs_per_sec;
2939
2940 sbi->dir_level = DEF_DIR_LEVEL;
2941 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
2942 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
2943 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
2944 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
2945 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
2946 sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
2947 DEF_UMOUNT_DISCARD_TIMEOUT;
2948 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2949
2950 for (i = 0; i < NR_COUNT_TYPE; i++)
2951 atomic_set(&sbi->nr_pages[i], 0);
2952
2953 for (i = 0; i < META; i++)
2954 atomic_set(&sbi->wb_sync_req[i], 0);
2955
2956 INIT_LIST_HEAD(&sbi->s_list);
2957 mutex_init(&sbi->umount_mutex);
2958 init_rwsem(&sbi->io_order_lock);
2959 spin_lock_init(&sbi->cp_lock);
2960
2961 sbi->dirty_device = 0;
2962 spin_lock_init(&sbi->dev_lock);
2963
2964 init_rwsem(&sbi->sb_lock);
2965 init_rwsem(&sbi->pin_sem);
2966 }
2967
2968 static int init_percpu_info(struct f2fs_sb_info *sbi)
2969 {
2970 int err;
2971
2972 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
2973 if (err)
2974 return err;
2975
2976 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
2977 GFP_KERNEL);
2978 if (err)
2979 percpu_counter_destroy(&sbi->alloc_valid_block_count);
2980
2981 return err;
2982 }
2983
2984 #ifdef CONFIG_BLK_DEV_ZONED
2985 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
2986 void *data)
2987 {
2988 struct f2fs_dev_info *dev = data;
2989
2990 if (zone->type != BLK_ZONE_TYPE_CONVENTIONAL)
2991 set_bit(idx, dev->blkz_seq);
2992 return 0;
2993 }
2994
2995 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
2996 {
2997 struct block_device *bdev = FDEV(devi).bdev;
2998 sector_t nr_sectors = bdev->bd_part->nr_sects;
2999 int ret;
3000
3001 if (!f2fs_sb_has_blkzoned(sbi))
3002 return 0;
3003
3004 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3005 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3006 return -EINVAL;
3007 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3008 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3009 __ilog2_u32(sbi->blocks_per_blkz))
3010 return -EINVAL;
3011 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3012 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3013 sbi->log_blocks_per_blkz;
3014 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3015 FDEV(devi).nr_blkz++;
3016
3017 FDEV(devi).blkz_seq = f2fs_kzalloc(sbi,
3018 BITS_TO_LONGS(FDEV(devi).nr_blkz)
3019 * sizeof(unsigned long),
3020 GFP_KERNEL);
3021 if (!FDEV(devi).blkz_seq)
3022 return -ENOMEM;
3023
3024 /* Get block zones type */
3025 ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3026 &FDEV(devi));
3027 if (ret < 0)
3028 return ret;
3029
3030 return 0;
3031 }
3032 #endif
3033
3034 /*
3035 * Read f2fs raw super block.
3036 * Because we have two copies of super block, so read both of them
3037 * to get the first valid one. If any one of them is broken, we pass
3038 * them recovery flag back to the caller.
3039 */
3040 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3041 struct f2fs_super_block **raw_super,
3042 int *valid_super_block, int *recovery)
3043 {
3044 struct super_block *sb = sbi->sb;
3045 int block;
3046 struct buffer_head *bh;
3047 struct f2fs_super_block *super;
3048 int err = 0;
3049
3050 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3051 if (!super)
3052 return -ENOMEM;
3053
3054 for (block = 0; block < 2; block++) {
3055 bh = sb_bread(sb, block);
3056 if (!bh) {
3057 f2fs_err(sbi, "Unable to read %dth superblock",
3058 block + 1);
3059 err = -EIO;
3060 *recovery = 1;
3061 continue;
3062 }
3063
3064 /* sanity checking of raw super */
3065 err = sanity_check_raw_super(sbi, bh);
3066 if (err) {
3067 f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3068 block + 1);
3069 brelse(bh);
3070 *recovery = 1;
3071 continue;
3072 }
3073
3074 if (!*raw_super) {
3075 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3076 sizeof(*super));
3077 *valid_super_block = block;
3078 *raw_super = super;
3079 }
3080 brelse(bh);
3081 }
3082
3083 /* No valid superblock */
3084 if (!*raw_super)
3085 kvfree(super);
3086 else
3087 err = 0;
3088
3089 return err;
3090 }
3091
3092 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3093 {
3094 struct buffer_head *bh;
3095 __u32 crc = 0;
3096 int err;
3097
3098 if ((recover && f2fs_readonly(sbi->sb)) ||
3099 bdev_read_only(sbi->sb->s_bdev)) {
3100 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3101 return -EROFS;
3102 }
3103
3104 /* we should update superblock crc here */
3105 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3106 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3107 offsetof(struct f2fs_super_block, crc));
3108 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3109 }
3110
3111 /* write back-up superblock first */
3112 bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3113 if (!bh)
3114 return -EIO;
3115 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3116 brelse(bh);
3117
3118 /* if we are in recovery path, skip writing valid superblock */
3119 if (recover || err)
3120 return err;
3121
3122 /* write current valid superblock */
3123 bh = sb_bread(sbi->sb, sbi->valid_super_block);
3124 if (!bh)
3125 return -EIO;
3126 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3127 brelse(bh);
3128 return err;
3129 }
3130
3131 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3132 {
3133 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3134 unsigned int max_devices = MAX_DEVICES;
3135 int i;
3136
3137 /* Initialize single device information */
3138 if (!RDEV(0).path[0]) {
3139 if (!bdev_is_zoned(sbi->sb->s_bdev))
3140 return 0;
3141 max_devices = 1;
3142 }
3143
3144 /*
3145 * Initialize multiple devices information, or single
3146 * zoned block device information.
3147 */
3148 sbi->devs = f2fs_kzalloc(sbi,
3149 array_size(max_devices,
3150 sizeof(struct f2fs_dev_info)),
3151 GFP_KERNEL);
3152 if (!sbi->devs)
3153 return -ENOMEM;
3154
3155 for (i = 0; i < max_devices; i++) {
3156
3157 if (i > 0 && !RDEV(i).path[0])
3158 break;
3159
3160 if (max_devices == 1) {
3161 /* Single zoned block device mount */
3162 FDEV(0).bdev =
3163 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3164 sbi->sb->s_mode, sbi->sb->s_type);
3165 } else {
3166 /* Multi-device mount */
3167 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3168 FDEV(i).total_segments =
3169 le32_to_cpu(RDEV(i).total_segments);
3170 if (i == 0) {
3171 FDEV(i).start_blk = 0;
3172 FDEV(i).end_blk = FDEV(i).start_blk +
3173 (FDEV(i).total_segments <<
3174 sbi->log_blocks_per_seg) - 1 +
3175 le32_to_cpu(raw_super->segment0_blkaddr);
3176 } else {
3177 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3178 FDEV(i).end_blk = FDEV(i).start_blk +
3179 (FDEV(i).total_segments <<
3180 sbi->log_blocks_per_seg) - 1;
3181 }
3182 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3183 sbi->sb->s_mode, sbi->sb->s_type);
3184 }
3185 if (IS_ERR(FDEV(i).bdev))
3186 return PTR_ERR(FDEV(i).bdev);
3187
3188 /* to release errored devices */
3189 sbi->s_ndevs = i + 1;
3190
3191 #ifdef CONFIG_BLK_DEV_ZONED
3192 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3193 !f2fs_sb_has_blkzoned(sbi)) {
3194 f2fs_err(sbi, "Zoned block device feature not enabled\n");
3195 return -EINVAL;
3196 }
3197 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3198 if (init_blkz_info(sbi, i)) {
3199 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3200 return -EINVAL;
3201 }
3202 if (max_devices == 1)
3203 break;
3204 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3205 i, FDEV(i).path,
3206 FDEV(i).total_segments,
3207 FDEV(i).start_blk, FDEV(i).end_blk,
3208 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3209 "Host-aware" : "Host-managed");
3210 continue;
3211 }
3212 #endif
3213 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3214 i, FDEV(i).path,
3215 FDEV(i).total_segments,
3216 FDEV(i).start_blk, FDEV(i).end_blk);
3217 }
3218 f2fs_info(sbi,
3219 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3220 return 0;
3221 }
3222
3223 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3224 {
3225 #ifdef CONFIG_UNICODE
3226 if (f2fs_sb_has_casefold(sbi) && !sbi->s_encoding) {
3227 const struct f2fs_sb_encodings *encoding_info;
3228 struct unicode_map *encoding;
3229 __u16 encoding_flags;
3230
3231 if (f2fs_sb_has_encrypt(sbi)) {
3232 f2fs_err(sbi,
3233 "Can't mount with encoding and encryption");
3234 return -EINVAL;
3235 }
3236
3237 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3238 &encoding_flags)) {
3239 f2fs_err(sbi,
3240 "Encoding requested by superblock is unknown");
3241 return -EINVAL;
3242 }
3243
3244 encoding = utf8_load(encoding_info->version);
3245 if (IS_ERR(encoding)) {
3246 f2fs_err(sbi,
3247 "can't mount with superblock charset: %s-%s "
3248 "not supported by the kernel. flags: 0x%x.",
3249 encoding_info->name, encoding_info->version,
3250 encoding_flags);
3251 return PTR_ERR(encoding);
3252 }
3253 f2fs_info(sbi, "Using encoding defined by superblock: "
3254 "%s-%s with flags 0x%hx", encoding_info->name,
3255 encoding_info->version?:"\b", encoding_flags);
3256
3257 sbi->s_encoding = encoding;
3258 sbi->s_encoding_flags = encoding_flags;
3259 sbi->sb->s_d_op = &f2fs_dentry_ops;
3260 }
3261 #else
3262 if (f2fs_sb_has_casefold(sbi)) {
3263 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
3264 return -EINVAL;
3265 }
3266 #endif
3267 return 0;
3268 }
3269
3270 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3271 {
3272 struct f2fs_sm_info *sm_i = SM_I(sbi);
3273
3274 /* adjust parameters according to the volume size */
3275 if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3276 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3277 sm_i->dcc_info->discard_granularity = 1;
3278 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3279 }
3280
3281 sbi->readdir_ra = 1;
3282 }
3283
3284 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3285 {
3286 struct f2fs_sb_info *sbi;
3287 struct f2fs_super_block *raw_super;
3288 struct inode *root;
3289 int err;
3290 bool skip_recovery = false, need_fsck = false;
3291 char *options = NULL;
3292 int recovery, i, valid_super_block;
3293 struct curseg_info *seg_i;
3294 int retry_cnt = 1;
3295
3296 try_onemore:
3297 err = -EINVAL;
3298 raw_super = NULL;
3299 valid_super_block = -1;
3300 recovery = 0;
3301
3302 /* allocate memory for f2fs-specific super block info */
3303 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3304 if (!sbi)
3305 return -ENOMEM;
3306
3307 sbi->sb = sb;
3308
3309 /* Load the checksum driver */
3310 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3311 if (IS_ERR(sbi->s_chksum_driver)) {
3312 f2fs_err(sbi, "Cannot load crc32 driver.");
3313 err = PTR_ERR(sbi->s_chksum_driver);
3314 sbi->s_chksum_driver = NULL;
3315 goto free_sbi;
3316 }
3317
3318 /* set a block size */
3319 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3320 f2fs_err(sbi, "unable to set blocksize");
3321 goto free_sbi;
3322 }
3323
3324 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3325 &recovery);
3326 if (err)
3327 goto free_sbi;
3328
3329 sb->s_fs_info = sbi;
3330 sbi->raw_super = raw_super;
3331
3332 /* precompute checksum seed for metadata */
3333 if (f2fs_sb_has_inode_chksum(sbi))
3334 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3335 sizeof(raw_super->uuid));
3336
3337 /*
3338 * The BLKZONED feature indicates that the drive was formatted with
3339 * zone alignment optimization. This is optional for host-aware
3340 * devices, but mandatory for host-managed zoned block devices.
3341 */
3342 #ifndef CONFIG_BLK_DEV_ZONED
3343 if (f2fs_sb_has_blkzoned(sbi)) {
3344 f2fs_err(sbi, "Zoned block device support is not enabled");
3345 err = -EOPNOTSUPP;
3346 goto free_sb_buf;
3347 }
3348 #endif
3349 default_options(sbi);
3350 /* parse mount options */
3351 options = kstrdup((const char *)data, GFP_KERNEL);
3352 if (data && !options) {
3353 err = -ENOMEM;
3354 goto free_sb_buf;
3355 }
3356
3357 err = parse_options(sb, options);
3358 if (err)
3359 goto free_options;
3360
3361 sbi->max_file_blocks = max_file_blocks();
3362 sb->s_maxbytes = sbi->max_file_blocks <<
3363 le32_to_cpu(raw_super->log_blocksize);
3364 sb->s_max_links = F2FS_LINK_MAX;
3365
3366 err = f2fs_setup_casefold(sbi);
3367 if (err)
3368 goto free_options;
3369
3370 #ifdef CONFIG_QUOTA
3371 sb->dq_op = &f2fs_quota_operations;
3372 sb->s_qcop = &f2fs_quotactl_ops;
3373 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3374
3375 if (f2fs_sb_has_quota_ino(sbi)) {
3376 for (i = 0; i < MAXQUOTAS; i++) {
3377 if (f2fs_qf_ino(sbi->sb, i))
3378 sbi->nquota_files++;
3379 }
3380 }
3381 #endif
3382
3383 sb->s_op = &f2fs_sops;
3384 #ifdef CONFIG_FS_ENCRYPTION
3385 sb->s_cop = &f2fs_cryptops;
3386 #endif
3387 #ifdef CONFIG_FS_VERITY
3388 sb->s_vop = &f2fs_verityops;
3389 #endif
3390 sb->s_xattr = f2fs_xattr_handlers;
3391 sb->s_export_op = &f2fs_export_ops;
3392 sb->s_magic = F2FS_SUPER_MAGIC;
3393 sb->s_time_gran = 1;
3394 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3395 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3396 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3397 sb->s_iflags |= SB_I_CGROUPWB;
3398
3399 /* init f2fs-specific super block info */
3400 sbi->valid_super_block = valid_super_block;
3401 init_rwsem(&sbi->gc_lock);
3402 mutex_init(&sbi->writepages);
3403 mutex_init(&sbi->cp_mutex);
3404 mutex_init(&sbi->resize_mutex);
3405 init_rwsem(&sbi->node_write);
3406 init_rwsem(&sbi->node_change);
3407
3408 /* disallow all the data/node/meta page writes */
3409 set_sbi_flag(sbi, SBI_POR_DOING);
3410 spin_lock_init(&sbi->stat_lock);
3411
3412 /* init iostat info */
3413 spin_lock_init(&sbi->iostat_lock);
3414 sbi->iostat_enable = false;
3415
3416 for (i = 0; i < NR_PAGE_TYPE; i++) {
3417 int n = (i == META) ? 1: NR_TEMP_TYPE;
3418 int j;
3419
3420 sbi->write_io[i] =
3421 f2fs_kmalloc(sbi,
3422 array_size(n,
3423 sizeof(struct f2fs_bio_info)),
3424 GFP_KERNEL);
3425 if (!sbi->write_io[i]) {
3426 err = -ENOMEM;
3427 goto free_bio_info;
3428 }
3429
3430 for (j = HOT; j < n; j++) {
3431 init_rwsem(&sbi->write_io[i][j].io_rwsem);
3432 sbi->write_io[i][j].sbi = sbi;
3433 sbi->write_io[i][j].bio = NULL;
3434 spin_lock_init(&sbi->write_io[i][j].io_lock);
3435 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3436 INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
3437 init_rwsem(&sbi->write_io[i][j].bio_list_lock);
3438 }
3439 }
3440
3441 init_rwsem(&sbi->cp_rwsem);
3442 init_rwsem(&sbi->quota_sem);
3443 init_waitqueue_head(&sbi->cp_wait);
3444 init_sb_info(sbi);
3445
3446 err = init_percpu_info(sbi);
3447 if (err)
3448 goto free_bio_info;
3449
3450 if (F2FS_IO_ALIGNED(sbi)) {
3451 sbi->write_io_dummy =
3452 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3453 if (!sbi->write_io_dummy) {
3454 err = -ENOMEM;
3455 goto free_percpu;
3456 }
3457 }
3458
3459 /* get an inode for meta space */
3460 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3461 if (IS_ERR(sbi->meta_inode)) {
3462 f2fs_err(sbi, "Failed to read F2FS meta data inode");
3463 err = PTR_ERR(sbi->meta_inode);
3464 goto free_io_dummy;
3465 }
3466
3467 err = f2fs_get_valid_checkpoint(sbi);
3468 if (err) {
3469 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
3470 goto free_meta_inode;
3471 }
3472
3473 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3474 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3475 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3476 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3477 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3478 }
3479
3480 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
3481 set_sbi_flag(sbi, SBI_NEED_FSCK);
3482
3483 /* Initialize device list */
3484 err = f2fs_scan_devices(sbi);
3485 if (err) {
3486 f2fs_err(sbi, "Failed to find devices");
3487 goto free_devices;
3488 }
3489
3490 err = f2fs_init_post_read_wq(sbi);
3491 if (err) {
3492 f2fs_err(sbi, "Failed to initialize post read workqueue");
3493 goto free_devices;
3494 }
3495
3496 sbi->total_valid_node_count =
3497 le32_to_cpu(sbi->ckpt->valid_node_count);
3498 percpu_counter_set(&sbi->total_valid_inode_count,
3499 le32_to_cpu(sbi->ckpt->valid_inode_count));
3500 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3501 sbi->total_valid_block_count =
3502 le64_to_cpu(sbi->ckpt->valid_block_count);
3503 sbi->last_valid_block_count = sbi->total_valid_block_count;
3504 sbi->reserved_blocks = 0;
3505 sbi->current_reserved_blocks = 0;
3506 limit_reserve_root(sbi);
3507
3508 for (i = 0; i < NR_INODE_TYPE; i++) {
3509 INIT_LIST_HEAD(&sbi->inode_list[i]);
3510 spin_lock_init(&sbi->inode_lock[i]);
3511 }
3512 mutex_init(&sbi->flush_lock);
3513
3514 f2fs_init_extent_cache_info(sbi);
3515
3516 f2fs_init_ino_entry_info(sbi);
3517
3518 f2fs_init_fsync_node_info(sbi);
3519
3520 /* setup f2fs internal modules */
3521 err = f2fs_build_segment_manager(sbi);
3522 if (err) {
3523 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
3524 err);
3525 goto free_sm;
3526 }
3527 err = f2fs_build_node_manager(sbi);
3528 if (err) {
3529 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
3530 err);
3531 goto free_nm;
3532 }
3533
3534 /* For write statistics */
3535 if (sb->s_bdev->bd_part)
3536 sbi->sectors_written_start =
3537 (u64)part_stat_read(sb->s_bdev->bd_part,
3538 sectors[STAT_WRITE]);
3539
3540 /* Read accumulated write IO statistics if exists */
3541 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3542 if (__exist_node_summaries(sbi))
3543 sbi->kbytes_written =
3544 le64_to_cpu(seg_i->journal->info.kbytes_written);
3545
3546 f2fs_build_gc_manager(sbi);
3547
3548 err = f2fs_build_stats(sbi);
3549 if (err)
3550 goto free_nm;
3551
3552 /* get an inode for node space */
3553 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3554 if (IS_ERR(sbi->node_inode)) {
3555 f2fs_err(sbi, "Failed to read node inode");
3556 err = PTR_ERR(sbi->node_inode);
3557 goto free_stats;
3558 }
3559
3560 /* read root inode and dentry */
3561 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3562 if (IS_ERR(root)) {
3563 f2fs_err(sbi, "Failed to read root inode");
3564 err = PTR_ERR(root);
3565 goto free_node_inode;
3566 }
3567 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3568 !root->i_size || !root->i_nlink) {
3569 iput(root);
3570 err = -EINVAL;
3571 goto free_node_inode;
3572 }
3573
3574 sb->s_root = d_make_root(root); /* allocate root dentry */
3575 if (!sb->s_root) {
3576 err = -ENOMEM;
3577 goto free_node_inode;
3578 }
3579
3580 err = f2fs_register_sysfs(sbi);
3581 if (err)
3582 goto free_root_inode;
3583
3584 #ifdef CONFIG_QUOTA
3585 /* Enable quota usage during mount */
3586 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3587 err = f2fs_enable_quotas(sb);
3588 if (err)
3589 f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
3590 }
3591 #endif
3592 /* if there are nt orphan nodes free them */
3593 err = f2fs_recover_orphan_inodes(sbi);
3594 if (err)
3595 goto free_meta;
3596
3597 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3598 goto reset_checkpoint;
3599
3600 /* recover fsynced data */
3601 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
3602 /*
3603 * mount should be failed, when device has readonly mode, and
3604 * previous checkpoint was not done by clean system shutdown.
3605 */
3606 if (f2fs_hw_is_readonly(sbi)) {
3607 if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3608 err = -EROFS;
3609 f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
3610 goto free_meta;
3611 }
3612 f2fs_info(sbi, "write access unavailable, skipping recovery");
3613 goto reset_checkpoint;
3614 }
3615
3616 if (need_fsck)
3617 set_sbi_flag(sbi, SBI_NEED_FSCK);
3618
3619 if (skip_recovery)
3620 goto reset_checkpoint;
3621
3622 err = f2fs_recover_fsync_data(sbi, false);
3623 if (err < 0) {
3624 if (err != -ENOMEM)
3625 skip_recovery = true;
3626 need_fsck = true;
3627 f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
3628 err);
3629 goto free_meta;
3630 }
3631 } else {
3632 err = f2fs_recover_fsync_data(sbi, true);
3633
3634 if (!f2fs_readonly(sb) && err > 0) {
3635 err = -EINVAL;
3636 f2fs_err(sbi, "Need to recover fsync data");
3637 goto free_meta;
3638 }
3639 }
3640
3641 /*
3642 * If the f2fs is not readonly and fsync data recovery succeeds,
3643 * check zoned block devices' write pointer consistency.
3644 */
3645 if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
3646 err = f2fs_check_write_pointer(sbi);
3647 if (err)
3648 goto free_meta;
3649 }
3650
3651 reset_checkpoint:
3652 /* f2fs_recover_fsync_data() cleared this already */
3653 clear_sbi_flag(sbi, SBI_POR_DOING);
3654
3655 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3656 err = f2fs_disable_checkpoint(sbi);
3657 if (err)
3658 goto sync_free_meta;
3659 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3660 f2fs_enable_checkpoint(sbi);
3661 }
3662
3663 /*
3664 * If filesystem is not mounted as read-only then
3665 * do start the gc_thread.
3666 */
3667 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
3668 /* After POR, we can run background GC thread.*/
3669 err = f2fs_start_gc_thread(sbi);
3670 if (err)
3671 goto sync_free_meta;
3672 }
3673 kvfree(options);
3674
3675 /* recover broken superblock */
3676 if (recovery) {
3677 err = f2fs_commit_super(sbi, true);
3678 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
3679 sbi->valid_super_block ? 1 : 2, err);
3680 }
3681
3682 f2fs_join_shrinker(sbi);
3683
3684 f2fs_tuning_parameters(sbi);
3685
3686 f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
3687 cur_cp_version(F2FS_CKPT(sbi)));
3688 f2fs_update_time(sbi, CP_TIME);
3689 f2fs_update_time(sbi, REQ_TIME);
3690 clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3691 return 0;
3692
3693 sync_free_meta:
3694 /* safe to flush all the data */
3695 sync_filesystem(sbi->sb);
3696 retry_cnt = 0;
3697
3698 free_meta:
3699 #ifdef CONFIG_QUOTA
3700 f2fs_truncate_quota_inode_pages(sb);
3701 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3702 f2fs_quota_off_umount(sbi->sb);
3703 #endif
3704 /*
3705 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3706 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3707 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3708 * falls into an infinite loop in f2fs_sync_meta_pages().
3709 */
3710 truncate_inode_pages_final(META_MAPPING(sbi));
3711 /* evict some inodes being cached by GC */
3712 evict_inodes(sb);
3713 f2fs_unregister_sysfs(sbi);
3714 free_root_inode:
3715 dput(sb->s_root);
3716 sb->s_root = NULL;
3717 free_node_inode:
3718 f2fs_release_ino_entry(sbi, true);
3719 truncate_inode_pages_final(NODE_MAPPING(sbi));
3720 iput(sbi->node_inode);
3721 sbi->node_inode = NULL;
3722 free_stats:
3723 f2fs_destroy_stats(sbi);
3724 free_nm:
3725 f2fs_destroy_node_manager(sbi);
3726 free_sm:
3727 f2fs_destroy_segment_manager(sbi);
3728 f2fs_destroy_post_read_wq(sbi);
3729 free_devices:
3730 destroy_device_list(sbi);
3731 kvfree(sbi->ckpt);
3732 free_meta_inode:
3733 make_bad_inode(sbi->meta_inode);
3734 iput(sbi->meta_inode);
3735 sbi->meta_inode = NULL;
3736 free_io_dummy:
3737 mempool_destroy(sbi->write_io_dummy);
3738 free_percpu:
3739 destroy_percpu_info(sbi);
3740 free_bio_info:
3741 for (i = 0; i < NR_PAGE_TYPE; i++)
3742 kvfree(sbi->write_io[i]);
3743
3744 #ifdef CONFIG_UNICODE
3745 utf8_unload(sbi->s_encoding);
3746 #endif
3747 free_options:
3748 #ifdef CONFIG_QUOTA
3749 for (i = 0; i < MAXQUOTAS; i++)
3750 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
3751 #endif
3752 kvfree(options);
3753 free_sb_buf:
3754 kvfree(raw_super);
3755 free_sbi:
3756 if (sbi->s_chksum_driver)
3757 crypto_free_shash(sbi->s_chksum_driver);
3758 kvfree(sbi);
3759
3760 /* give only one another chance */
3761 if (retry_cnt > 0 && skip_recovery) {
3762 retry_cnt--;
3763 shrink_dcache_sb(sb);
3764 goto try_onemore;
3765 }
3766 return err;
3767 }
3768
3769 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3770 const char *dev_name, void *data)
3771 {
3772 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3773 }
3774
3775 static void kill_f2fs_super(struct super_block *sb)
3776 {
3777 if (sb->s_root) {
3778 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3779
3780 set_sbi_flag(sbi, SBI_IS_CLOSE);
3781 f2fs_stop_gc_thread(sbi);
3782 f2fs_stop_discard_thread(sbi);
3783
3784 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3785 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3786 struct cp_control cpc = {
3787 .reason = CP_UMOUNT,
3788 };
3789 f2fs_write_checkpoint(sbi, &cpc);
3790 }
3791
3792 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3793 sb->s_flags &= ~SB_RDONLY;
3794 }
3795 kill_block_super(sb);
3796 }
3797
3798 static struct file_system_type f2fs_fs_type = {
3799 .owner = THIS_MODULE,
3800 .name = "f2fs",
3801 .mount = f2fs_mount,
3802 .kill_sb = kill_f2fs_super,
3803 .fs_flags = FS_REQUIRES_DEV,
3804 };
3805 MODULE_ALIAS_FS("f2fs");
3806
3807 static int __init init_inodecache(void)
3808 {
3809 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3810 sizeof(struct f2fs_inode_info), 0,
3811 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3812 if (!f2fs_inode_cachep)
3813 return -ENOMEM;
3814 return 0;
3815 }
3816
3817 static void destroy_inodecache(void)
3818 {
3819 /*
3820 * Make sure all delayed rcu free inodes are flushed before we
3821 * destroy cache.
3822 */
3823 rcu_barrier();
3824 kmem_cache_destroy(f2fs_inode_cachep);
3825 }
3826
3827 static int __init init_f2fs_fs(void)
3828 {
3829 int err;
3830
3831 if (PAGE_SIZE != F2FS_BLKSIZE) {
3832 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3833 PAGE_SIZE, F2FS_BLKSIZE);
3834 return -EINVAL;
3835 }
3836
3837 f2fs_build_trace_ios();
3838
3839 err = init_inodecache();
3840 if (err)
3841 goto fail;
3842 err = f2fs_create_node_manager_caches();
3843 if (err)
3844 goto free_inodecache;
3845 err = f2fs_create_segment_manager_caches();
3846 if (err)
3847 goto free_node_manager_caches;
3848 err = f2fs_create_checkpoint_caches();
3849 if (err)
3850 goto free_segment_manager_caches;
3851 err = f2fs_create_extent_cache();
3852 if (err)
3853 goto free_checkpoint_caches;
3854 err = f2fs_init_sysfs();
3855 if (err)
3856 goto free_extent_cache;
3857 err = register_shrinker(&f2fs_shrinker_info);
3858 if (err)
3859 goto free_sysfs;
3860 err = register_filesystem(&f2fs_fs_type);
3861 if (err)
3862 goto free_shrinker;
3863 f2fs_create_root_stats();
3864 err = f2fs_init_post_read_processing();
3865 if (err)
3866 goto free_root_stats;
3867 err = f2fs_init_bio_entry_cache();
3868 if (err)
3869 goto free_post_read;
3870 err = f2fs_init_bioset();
3871 if (err)
3872 goto free_bio_enrty_cache;
3873 return 0;
3874 free_bio_enrty_cache:
3875 f2fs_destroy_bio_entry_cache();
3876 free_post_read:
3877 f2fs_destroy_post_read_processing();
3878 free_root_stats:
3879 f2fs_destroy_root_stats();
3880 unregister_filesystem(&f2fs_fs_type);
3881 free_shrinker:
3882 unregister_shrinker(&f2fs_shrinker_info);
3883 free_sysfs:
3884 f2fs_exit_sysfs();
3885 free_extent_cache:
3886 f2fs_destroy_extent_cache();
3887 free_checkpoint_caches:
3888 f2fs_destroy_checkpoint_caches();
3889 free_segment_manager_caches:
3890 f2fs_destroy_segment_manager_caches();
3891 free_node_manager_caches:
3892 f2fs_destroy_node_manager_caches();
3893 free_inodecache:
3894 destroy_inodecache();
3895 fail:
3896 return err;
3897 }
3898
3899 static void __exit exit_f2fs_fs(void)
3900 {
3901 f2fs_destroy_bioset();
3902 f2fs_destroy_bio_entry_cache();
3903 f2fs_destroy_post_read_processing();
3904 f2fs_destroy_root_stats();
3905 unregister_filesystem(&f2fs_fs_type);
3906 unregister_shrinker(&f2fs_shrinker_info);
3907 f2fs_exit_sysfs();
3908 f2fs_destroy_extent_cache();
3909 f2fs_destroy_checkpoint_caches();
3910 f2fs_destroy_segment_manager_caches();
3911 f2fs_destroy_node_manager_caches();
3912 destroy_inodecache();
3913 f2fs_destroy_trace_ios();
3914 }
3915
3916 module_init(init_f2fs_fs)
3917 module_exit(exit_f2fs_fs)
3918
3919 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
3920 MODULE_DESCRIPTION("Flash Friendly File System");
3921 MODULE_LICENSE("GPL");
3922
Linux with added FPC-III support