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Linux 5.2
[linux-2.6/linux-2.6-arm.git] / fs / f2fs / super.c
blob6b959bbb336a30543bd24a87e92d7cb28da1f274
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/super.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/fs.h>
11 #include <linux/statfs.h>
12 #include <linux/buffer_head.h>
13 #include <linux/backing-dev.h>
14 #include <linux/kthread.h>
15 #include <linux/parser.h>
16 #include <linux/mount.h>
17 #include <linux/seq_file.h>
18 #include <linux/proc_fs.h>
19 #include <linux/random.h>
20 #include <linux/exportfs.h>
21 #include <linux/blkdev.h>
22 #include <linux/quotaops.h>
23 #include <linux/f2fs_fs.h>
24 #include <linux/sysfs.h>
25 #include <linux/quota.h>
26
27 #include "f2fs.h"
28 #include "node.h"
29 #include "segment.h"
30 #include "xattr.h"
31 #include "gc.h"
32 #include "trace.h"
33
34 #define CREATE_TRACE_POINTS
35 #include <trace/events/f2fs.h>
36
37 static struct kmem_cache *f2fs_inode_cachep;
38
39 #ifdef CONFIG_F2FS_FAULT_INJECTION
40
41 const char *f2fs_fault_name[FAULT_MAX] = {
42 [FAULT_KMALLOC] = "kmalloc",
43 [FAULT_KVMALLOC] = "kvmalloc",
44 [FAULT_PAGE_ALLOC] = "page alloc",
45 [FAULT_PAGE_GET] = "page get",
46 [FAULT_ALLOC_BIO] = "alloc bio",
47 [FAULT_ALLOC_NID] = "alloc nid",
48 [FAULT_ORPHAN] = "orphan",
49 [FAULT_BLOCK] = "no more block",
50 [FAULT_DIR_DEPTH] = "too big dir depth",
51 [FAULT_EVICT_INODE] = "evict_inode fail",
52 [FAULT_TRUNCATE] = "truncate fail",
53 [FAULT_READ_IO] = "read IO error",
54 [FAULT_CHECKPOINT] = "checkpoint error",
55 [FAULT_DISCARD] = "discard error",
56 [FAULT_WRITE_IO] = "write IO error",
57 };
58
59 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
60 unsigned int type)
61 {
62 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
63
64 if (rate) {
65 atomic_set(&ffi->inject_ops, 0);
66 ffi->inject_rate = rate;
67 }
68
69 if (type)
70 ffi->inject_type = type;
71
72 if (!rate && !type)
73 memset(ffi, 0, sizeof(struct f2fs_fault_info));
74 }
75 #endif
76
77 /* f2fs-wide shrinker description */
78 static struct shrinker f2fs_shrinker_info = {
79 .scan_objects = f2fs_shrink_scan,
80 .count_objects = f2fs_shrink_count,
81 .seeks = DEFAULT_SEEKS,
82 };
83
84 enum {
85 Opt_gc_background,
86 Opt_disable_roll_forward,
87 Opt_norecovery,
88 Opt_discard,
89 Opt_nodiscard,
90 Opt_noheap,
91 Opt_heap,
92 Opt_user_xattr,
93 Opt_nouser_xattr,
94 Opt_acl,
95 Opt_noacl,
96 Opt_active_logs,
97 Opt_disable_ext_identify,
98 Opt_inline_xattr,
99 Opt_noinline_xattr,
100 Opt_inline_xattr_size,
101 Opt_inline_data,
102 Opt_inline_dentry,
103 Opt_noinline_dentry,
104 Opt_flush_merge,
105 Opt_noflush_merge,
106 Opt_nobarrier,
107 Opt_fastboot,
108 Opt_extent_cache,
109 Opt_noextent_cache,
110 Opt_noinline_data,
111 Opt_data_flush,
112 Opt_reserve_root,
113 Opt_resgid,
114 Opt_resuid,
115 Opt_mode,
116 Opt_io_size_bits,
117 Opt_fault_injection,
118 Opt_fault_type,
119 Opt_lazytime,
120 Opt_nolazytime,
121 Opt_quota,
122 Opt_noquota,
123 Opt_usrquota,
124 Opt_grpquota,
125 Opt_prjquota,
126 Opt_usrjquota,
127 Opt_grpjquota,
128 Opt_prjjquota,
129 Opt_offusrjquota,
130 Opt_offgrpjquota,
131 Opt_offprjjquota,
132 Opt_jqfmt_vfsold,
133 Opt_jqfmt_vfsv0,
134 Opt_jqfmt_vfsv1,
135 Opt_whint,
136 Opt_alloc,
137 Opt_fsync,
138 Opt_test_dummy_encryption,
139 Opt_checkpoint,
140 Opt_err,
141 };
142
143 static match_table_t f2fs_tokens = {
144 {Opt_gc_background, "background_gc=%s"},
145 {Opt_disable_roll_forward, "disable_roll_forward"},
146 {Opt_norecovery, "norecovery"},
147 {Opt_discard, "discard"},
148 {Opt_nodiscard, "nodiscard"},
149 {Opt_noheap, "no_heap"},
150 {Opt_heap, "heap"},
151 {Opt_user_xattr, "user_xattr"},
152 {Opt_nouser_xattr, "nouser_xattr"},
153 {Opt_acl, "acl"},
154 {Opt_noacl, "noacl"},
155 {Opt_active_logs, "active_logs=%u"},
156 {Opt_disable_ext_identify, "disable_ext_identify"},
157 {Opt_inline_xattr, "inline_xattr"},
158 {Opt_noinline_xattr, "noinline_xattr"},
159 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
160 {Opt_inline_data, "inline_data"},
161 {Opt_inline_dentry, "inline_dentry"},
162 {Opt_noinline_dentry, "noinline_dentry"},
163 {Opt_flush_merge, "flush_merge"},
164 {Opt_noflush_merge, "noflush_merge"},
165 {Opt_nobarrier, "nobarrier"},
166 {Opt_fastboot, "fastboot"},
167 {Opt_extent_cache, "extent_cache"},
168 {Opt_noextent_cache, "noextent_cache"},
169 {Opt_noinline_data, "noinline_data"},
170 {Opt_data_flush, "data_flush"},
171 {Opt_reserve_root, "reserve_root=%u"},
172 {Opt_resgid, "resgid=%u"},
173 {Opt_resuid, "resuid=%u"},
174 {Opt_mode, "mode=%s"},
175 {Opt_io_size_bits, "io_bits=%u"},
176 {Opt_fault_injection, "fault_injection=%u"},
177 {Opt_fault_type, "fault_type=%u"},
178 {Opt_lazytime, "lazytime"},
179 {Opt_nolazytime, "nolazytime"},
180 {Opt_quota, "quota"},
181 {Opt_noquota, "noquota"},
182 {Opt_usrquota, "usrquota"},
183 {Opt_grpquota, "grpquota"},
184 {Opt_prjquota, "prjquota"},
185 {Opt_usrjquota, "usrjquota=%s"},
186 {Opt_grpjquota, "grpjquota=%s"},
187 {Opt_prjjquota, "prjjquota=%s"},
188 {Opt_offusrjquota, "usrjquota="},
189 {Opt_offgrpjquota, "grpjquota="},
190 {Opt_offprjjquota, "prjjquota="},
191 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
192 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
193 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
194 {Opt_whint, "whint_mode=%s"},
195 {Opt_alloc, "alloc_mode=%s"},
196 {Opt_fsync, "fsync_mode=%s"},
197 {Opt_test_dummy_encryption, "test_dummy_encryption"},
198 {Opt_checkpoint, "checkpoint=%s"},
199 {Opt_err, NULL},
200 };
201
202 void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
203 {
204 struct va_format vaf;
205 va_list args;
206
207 va_start(args, fmt);
208 vaf.fmt = fmt;
209 vaf.va = &args;
210 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
211 va_end(args);
212 }
213
214 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
215 {
216 block_t limit = (sbi->user_block_count << 1) / 1000;
217
218 /* limit is 0.2% */
219 if (test_opt(sbi, RESERVE_ROOT) &&
220 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
221 F2FS_OPTION(sbi).root_reserved_blocks = limit;
222 f2fs_msg(sbi->sb, KERN_INFO,
223 "Reduce reserved blocks for root = %u",
224 F2FS_OPTION(sbi).root_reserved_blocks);
225 }
226 if (!test_opt(sbi, RESERVE_ROOT) &&
227 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
228 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
229 !gid_eq(F2FS_OPTION(sbi).s_resgid,
230 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
231 f2fs_msg(sbi->sb, KERN_INFO,
232 "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
233 from_kuid_munged(&init_user_ns,
234 F2FS_OPTION(sbi).s_resuid),
235 from_kgid_munged(&init_user_ns,
236 F2FS_OPTION(sbi).s_resgid));
237 }
238
239 static void init_once(void *foo)
240 {
241 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
242
243 inode_init_once(&fi->vfs_inode);
244 }
245
246 #ifdef CONFIG_QUOTA
247 static const char * const quotatypes[] = INITQFNAMES;
248 #define QTYPE2NAME(t) (quotatypes[t])
249 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
250 substring_t *args)
251 {
252 struct f2fs_sb_info *sbi = F2FS_SB(sb);
253 char *qname;
254 int ret = -EINVAL;
255
256 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
257 f2fs_msg(sb, KERN_ERR,
258 "Cannot change journaled "
259 "quota options when quota turned on");
260 return -EINVAL;
261 }
262 if (f2fs_sb_has_quota_ino(sbi)) {
263 f2fs_msg(sb, KERN_INFO,
264 "QUOTA feature is enabled, so ignore qf_name");
265 return 0;
266 }
267
268 qname = match_strdup(args);
269 if (!qname) {
270 f2fs_msg(sb, KERN_ERR,
271 "Not enough memory for storing quotafile name");
272 return -ENOMEM;
273 }
274 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
275 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
276 ret = 0;
277 else
278 f2fs_msg(sb, KERN_ERR,
279 "%s quota file already specified",
280 QTYPE2NAME(qtype));
281 goto errout;
282 }
283 if (strchr(qname, '/')) {
284 f2fs_msg(sb, KERN_ERR,
285 "quotafile must be on filesystem root");
286 goto errout;
287 }
288 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
289 set_opt(sbi, QUOTA);
290 return 0;
291 errout:
292 kvfree(qname);
293 return ret;
294 }
295
296 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
297 {
298 struct f2fs_sb_info *sbi = F2FS_SB(sb);
299
300 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
301 f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
302 " when quota turned on");
303 return -EINVAL;
304 }
305 kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
306 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
307 return 0;
308 }
309
310 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
311 {
312 /*
313 * We do the test below only for project quotas. 'usrquota' and
314 * 'grpquota' mount options are allowed even without quota feature
315 * to support legacy quotas in quota files.
316 */
317 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
318 f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
319 "Cannot enable project quota enforcement.");
320 return -1;
321 }
322 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
323 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
324 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
325 if (test_opt(sbi, USRQUOTA) &&
326 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
327 clear_opt(sbi, USRQUOTA);
328
329 if (test_opt(sbi, GRPQUOTA) &&
330 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
331 clear_opt(sbi, GRPQUOTA);
332
333 if (test_opt(sbi, PRJQUOTA) &&
334 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
335 clear_opt(sbi, PRJQUOTA);
336
337 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
338 test_opt(sbi, PRJQUOTA)) {
339 f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
340 "format mixing");
341 return -1;
342 }
343
344 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
345 f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
346 "not specified");
347 return -1;
348 }
349 }
350
351 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
352 f2fs_msg(sbi->sb, KERN_INFO,
353 "QUOTA feature is enabled, so ignore jquota_fmt");
354 F2FS_OPTION(sbi).s_jquota_fmt = 0;
355 }
356 return 0;
357 }
358 #endif
359
360 static int parse_options(struct super_block *sb, char *options)
361 {
362 struct f2fs_sb_info *sbi = F2FS_SB(sb);
363 substring_t args[MAX_OPT_ARGS];
364 char *p, *name;
365 int arg = 0;
366 kuid_t uid;
367 kgid_t gid;
368 #ifdef CONFIG_QUOTA
369 int ret;
370 #endif
371
372 if (!options)
373 return 0;
374
375 while ((p = strsep(&options, ",")) != NULL) {
376 int token;
377 if (!*p)
378 continue;
379 /*
380 * Initialize args struct so we know whether arg was
381 * found; some options take optional arguments.
382 */
383 args[0].to = args[0].from = NULL;
384 token = match_token(p, f2fs_tokens, args);
385
386 switch (token) {
387 case Opt_gc_background:
388 name = match_strdup(&args[0]);
389
390 if (!name)
391 return -ENOMEM;
392 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
393 set_opt(sbi, BG_GC);
394 clear_opt(sbi, FORCE_FG_GC);
395 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
396 clear_opt(sbi, BG_GC);
397 clear_opt(sbi, FORCE_FG_GC);
398 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
399 set_opt(sbi, BG_GC);
400 set_opt(sbi, FORCE_FG_GC);
401 } else {
402 kvfree(name);
403 return -EINVAL;
404 }
405 kvfree(name);
406 break;
407 case Opt_disable_roll_forward:
408 set_opt(sbi, DISABLE_ROLL_FORWARD);
409 break;
410 case Opt_norecovery:
411 /* this option mounts f2fs with ro */
412 set_opt(sbi, DISABLE_ROLL_FORWARD);
413 if (!f2fs_readonly(sb))
414 return -EINVAL;
415 break;
416 case Opt_discard:
417 set_opt(sbi, DISCARD);
418 break;
419 case Opt_nodiscard:
420 if (f2fs_sb_has_blkzoned(sbi)) {
421 f2fs_msg(sb, KERN_WARNING,
422 "discard is required for zoned block devices");
423 return -EINVAL;
424 }
425 clear_opt(sbi, DISCARD);
426 break;
427 case Opt_noheap:
428 set_opt(sbi, NOHEAP);
429 break;
430 case Opt_heap:
431 clear_opt(sbi, NOHEAP);
432 break;
433 #ifdef CONFIG_F2FS_FS_XATTR
434 case Opt_user_xattr:
435 set_opt(sbi, XATTR_USER);
436 break;
437 case Opt_nouser_xattr:
438 clear_opt(sbi, XATTR_USER);
439 break;
440 case Opt_inline_xattr:
441 set_opt(sbi, INLINE_XATTR);
442 break;
443 case Opt_noinline_xattr:
444 clear_opt(sbi, INLINE_XATTR);
445 break;
446 case Opt_inline_xattr_size:
447 if (args->from && match_int(args, &arg))
448 return -EINVAL;
449 set_opt(sbi, INLINE_XATTR_SIZE);
450 F2FS_OPTION(sbi).inline_xattr_size = arg;
451 break;
452 #else
453 case Opt_user_xattr:
454 f2fs_msg(sb, KERN_INFO,
455 "user_xattr options not supported");
456 break;
457 case Opt_nouser_xattr:
458 f2fs_msg(sb, KERN_INFO,
459 "nouser_xattr options not supported");
460 break;
461 case Opt_inline_xattr:
462 f2fs_msg(sb, KERN_INFO,
463 "inline_xattr options not supported");
464 break;
465 case Opt_noinline_xattr:
466 f2fs_msg(sb, KERN_INFO,
467 "noinline_xattr options not supported");
468 break;
469 #endif
470 #ifdef CONFIG_F2FS_FS_POSIX_ACL
471 case Opt_acl:
472 set_opt(sbi, POSIX_ACL);
473 break;
474 case Opt_noacl:
475 clear_opt(sbi, POSIX_ACL);
476 break;
477 #else
478 case Opt_acl:
479 f2fs_msg(sb, KERN_INFO, "acl options not supported");
480 break;
481 case Opt_noacl:
482 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
483 break;
484 #endif
485 case Opt_active_logs:
486 if (args->from && match_int(args, &arg))
487 return -EINVAL;
488 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
489 return -EINVAL;
490 F2FS_OPTION(sbi).active_logs = arg;
491 break;
492 case Opt_disable_ext_identify:
493 set_opt(sbi, DISABLE_EXT_IDENTIFY);
494 break;
495 case Opt_inline_data:
496 set_opt(sbi, INLINE_DATA);
497 break;
498 case Opt_inline_dentry:
499 set_opt(sbi, INLINE_DENTRY);
500 break;
501 case Opt_noinline_dentry:
502 clear_opt(sbi, INLINE_DENTRY);
503 break;
504 case Opt_flush_merge:
505 set_opt(sbi, FLUSH_MERGE);
506 break;
507 case Opt_noflush_merge:
508 clear_opt(sbi, FLUSH_MERGE);
509 break;
510 case Opt_nobarrier:
511 set_opt(sbi, NOBARRIER);
512 break;
513 case Opt_fastboot:
514 set_opt(sbi, FASTBOOT);
515 break;
516 case Opt_extent_cache:
517 set_opt(sbi, EXTENT_CACHE);
518 break;
519 case Opt_noextent_cache:
520 clear_opt(sbi, EXTENT_CACHE);
521 break;
522 case Opt_noinline_data:
523 clear_opt(sbi, INLINE_DATA);
524 break;
525 case Opt_data_flush:
526 set_opt(sbi, DATA_FLUSH);
527 break;
528 case Opt_reserve_root:
529 if (args->from && match_int(args, &arg))
530 return -EINVAL;
531 if (test_opt(sbi, RESERVE_ROOT)) {
532 f2fs_msg(sb, KERN_INFO,
533 "Preserve previous reserve_root=%u",
534 F2FS_OPTION(sbi).root_reserved_blocks);
535 } else {
536 F2FS_OPTION(sbi).root_reserved_blocks = arg;
537 set_opt(sbi, RESERVE_ROOT);
538 }
539 break;
540 case Opt_resuid:
541 if (args->from && match_int(args, &arg))
542 return -EINVAL;
543 uid = make_kuid(current_user_ns(), arg);
544 if (!uid_valid(uid)) {
545 f2fs_msg(sb, KERN_ERR,
546 "Invalid uid value %d", arg);
547 return -EINVAL;
548 }
549 F2FS_OPTION(sbi).s_resuid = uid;
550 break;
551 case Opt_resgid:
552 if (args->from && match_int(args, &arg))
553 return -EINVAL;
554 gid = make_kgid(current_user_ns(), arg);
555 if (!gid_valid(gid)) {
556 f2fs_msg(sb, KERN_ERR,
557 "Invalid gid value %d", arg);
558 return -EINVAL;
559 }
560 F2FS_OPTION(sbi).s_resgid = gid;
561 break;
562 case Opt_mode:
563 name = match_strdup(&args[0]);
564
565 if (!name)
566 return -ENOMEM;
567 if (strlen(name) == 8 &&
568 !strncmp(name, "adaptive", 8)) {
569 if (f2fs_sb_has_blkzoned(sbi)) {
570 f2fs_msg(sb, KERN_WARNING,
571 "adaptive mode is not allowed with "
572 "zoned block device feature");
573 kvfree(name);
574 return -EINVAL;
575 }
576 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
577 } else if (strlen(name) == 3 &&
578 !strncmp(name, "lfs", 3)) {
579 set_opt_mode(sbi, F2FS_MOUNT_LFS);
580 } else {
581 kvfree(name);
582 return -EINVAL;
583 }
584 kvfree(name);
585 break;
586 case Opt_io_size_bits:
587 if (args->from && match_int(args, &arg))
588 return -EINVAL;
589 if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
590 f2fs_msg(sb, KERN_WARNING,
591 "Not support %d, larger than %d",
592 1 << arg, BIO_MAX_PAGES);
593 return -EINVAL;
594 }
595 F2FS_OPTION(sbi).write_io_size_bits = arg;
596 break;
597 #ifdef CONFIG_F2FS_FAULT_INJECTION
598 case Opt_fault_injection:
599 if (args->from && match_int(args, &arg))
600 return -EINVAL;
601 f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
602 set_opt(sbi, FAULT_INJECTION);
603 break;
604
605 case Opt_fault_type:
606 if (args->from && match_int(args, &arg))
607 return -EINVAL;
608 f2fs_build_fault_attr(sbi, 0, arg);
609 set_opt(sbi, FAULT_INJECTION);
610 break;
611 #else
612 case Opt_fault_injection:
613 f2fs_msg(sb, KERN_INFO,
614 "fault_injection options not supported");
615 break;
616
617 case Opt_fault_type:
618 f2fs_msg(sb, KERN_INFO,
619 "fault_type options not supported");
620 break;
621 #endif
622 case Opt_lazytime:
623 sb->s_flags |= SB_LAZYTIME;
624 break;
625 case Opt_nolazytime:
626 sb->s_flags &= ~SB_LAZYTIME;
627 break;
628 #ifdef CONFIG_QUOTA
629 case Opt_quota:
630 case Opt_usrquota:
631 set_opt(sbi, USRQUOTA);
632 break;
633 case Opt_grpquota:
634 set_opt(sbi, GRPQUOTA);
635 break;
636 case Opt_prjquota:
637 set_opt(sbi, PRJQUOTA);
638 break;
639 case Opt_usrjquota:
640 ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
641 if (ret)
642 return ret;
643 break;
644 case Opt_grpjquota:
645 ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
646 if (ret)
647 return ret;
648 break;
649 case Opt_prjjquota:
650 ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
651 if (ret)
652 return ret;
653 break;
654 case Opt_offusrjquota:
655 ret = f2fs_clear_qf_name(sb, USRQUOTA);
656 if (ret)
657 return ret;
658 break;
659 case Opt_offgrpjquota:
660 ret = f2fs_clear_qf_name(sb, GRPQUOTA);
661 if (ret)
662 return ret;
663 break;
664 case Opt_offprjjquota:
665 ret = f2fs_clear_qf_name(sb, PRJQUOTA);
666 if (ret)
667 return ret;
668 break;
669 case Opt_jqfmt_vfsold:
670 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
671 break;
672 case Opt_jqfmt_vfsv0:
673 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
674 break;
675 case Opt_jqfmt_vfsv1:
676 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
677 break;
678 case Opt_noquota:
679 clear_opt(sbi, QUOTA);
680 clear_opt(sbi, USRQUOTA);
681 clear_opt(sbi, GRPQUOTA);
682 clear_opt(sbi, PRJQUOTA);
683 break;
684 #else
685 case Opt_quota:
686 case Opt_usrquota:
687 case Opt_grpquota:
688 case Opt_prjquota:
689 case Opt_usrjquota:
690 case Opt_grpjquota:
691 case Opt_prjjquota:
692 case Opt_offusrjquota:
693 case Opt_offgrpjquota:
694 case Opt_offprjjquota:
695 case Opt_jqfmt_vfsold:
696 case Opt_jqfmt_vfsv0:
697 case Opt_jqfmt_vfsv1:
698 case Opt_noquota:
699 f2fs_msg(sb, KERN_INFO,
700 "quota operations not supported");
701 break;
702 #endif
703 case Opt_whint:
704 name = match_strdup(&args[0]);
705 if (!name)
706 return -ENOMEM;
707 if (strlen(name) == 10 &&
708 !strncmp(name, "user-based", 10)) {
709 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
710 } else if (strlen(name) == 3 &&
711 !strncmp(name, "off", 3)) {
712 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
713 } else if (strlen(name) == 8 &&
714 !strncmp(name, "fs-based", 8)) {
715 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
716 } else {
717 kvfree(name);
718 return -EINVAL;
719 }
720 kvfree(name);
721 break;
722 case Opt_alloc:
723 name = match_strdup(&args[0]);
724 if (!name)
725 return -ENOMEM;
726
727 if (strlen(name) == 7 &&
728 !strncmp(name, "default", 7)) {
729 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
730 } else if (strlen(name) == 5 &&
731 !strncmp(name, "reuse", 5)) {
732 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
733 } else {
734 kvfree(name);
735 return -EINVAL;
736 }
737 kvfree(name);
738 break;
739 case Opt_fsync:
740 name = match_strdup(&args[0]);
741 if (!name)
742 return -ENOMEM;
743 if (strlen(name) == 5 &&
744 !strncmp(name, "posix", 5)) {
745 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
746 } else if (strlen(name) == 6 &&
747 !strncmp(name, "strict", 6)) {
748 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
749 } else if (strlen(name) == 9 &&
750 !strncmp(name, "nobarrier", 9)) {
751 F2FS_OPTION(sbi).fsync_mode =
752 FSYNC_MODE_NOBARRIER;
753 } else {
754 kvfree(name);
755 return -EINVAL;
756 }
757 kvfree(name);
758 break;
759 case Opt_test_dummy_encryption:
760 #ifdef CONFIG_FS_ENCRYPTION
761 if (!f2fs_sb_has_encrypt(sbi)) {
762 f2fs_msg(sb, KERN_ERR, "Encrypt feature is off");
763 return -EINVAL;
764 }
765
766 F2FS_OPTION(sbi).test_dummy_encryption = true;
767 f2fs_msg(sb, KERN_INFO,
768 "Test dummy encryption mode enabled");
769 #else
770 f2fs_msg(sb, KERN_INFO,
771 "Test dummy encryption mount option ignored");
772 #endif
773 break;
774 case Opt_checkpoint:
775 name = match_strdup(&args[0]);
776 if (!name)
777 return -ENOMEM;
778
779 if (strlen(name) == 6 &&
780 !strncmp(name, "enable", 6)) {
781 clear_opt(sbi, DISABLE_CHECKPOINT);
782 } else if (strlen(name) == 7 &&
783 !strncmp(name, "disable", 7)) {
784 set_opt(sbi, DISABLE_CHECKPOINT);
785 } else {
786 kvfree(name);
787 return -EINVAL;
788 }
789 kvfree(name);
790 break;
791 default:
792 f2fs_msg(sb, KERN_ERR,
793 "Unrecognized mount option \"%s\" or missing value",
794 p);
795 return -EINVAL;
796 }
797 }
798 #ifdef CONFIG_QUOTA
799 if (f2fs_check_quota_options(sbi))
800 return -EINVAL;
801 #else
802 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
803 f2fs_msg(sbi->sb, KERN_INFO,
804 "Filesystem with quota feature cannot be mounted RDWR "
805 "without CONFIG_QUOTA");
806 return -EINVAL;
807 }
808 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
809 f2fs_msg(sb, KERN_ERR,
810 "Filesystem with project quota feature cannot be "
811 "mounted RDWR without CONFIG_QUOTA");
812 return -EINVAL;
813 }
814 #endif
815
816 if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
817 f2fs_msg(sb, KERN_ERR,
818 "Should set mode=lfs with %uKB-sized IO",
819 F2FS_IO_SIZE_KB(sbi));
820 return -EINVAL;
821 }
822
823 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
824 int min_size, max_size;
825
826 if (!f2fs_sb_has_extra_attr(sbi) ||
827 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
828 f2fs_msg(sb, KERN_ERR,
829 "extra_attr or flexible_inline_xattr "
830 "feature is off");
831 return -EINVAL;
832 }
833 if (!test_opt(sbi, INLINE_XATTR)) {
834 f2fs_msg(sb, KERN_ERR,
835 "inline_xattr_size option should be "
836 "set with inline_xattr option");
837 return -EINVAL;
838 }
839
840 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
841 max_size = MAX_INLINE_XATTR_SIZE;
842
843 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
844 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
845 f2fs_msg(sb, KERN_ERR,
846 "inline xattr size is out of range: %d ~ %d",
847 min_size, max_size);
848 return -EINVAL;
849 }
850 }
851
852 if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
853 f2fs_msg(sb, KERN_ERR,
854 "LFS not compatible with checkpoint=disable\n");
855 return -EINVAL;
856 }
857
858 /* Not pass down write hints if the number of active logs is lesser
859 * than NR_CURSEG_TYPE.
860 */
861 if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
862 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
863 return 0;
864 }
865
866 static struct inode *f2fs_alloc_inode(struct super_block *sb)
867 {
868 struct f2fs_inode_info *fi;
869
870 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
871 if (!fi)
872 return NULL;
873
874 init_once((void *) fi);
875
876 /* Initialize f2fs-specific inode info */
877 atomic_set(&fi->dirty_pages, 0);
878 init_rwsem(&fi->i_sem);
879 INIT_LIST_HEAD(&fi->dirty_list);
880 INIT_LIST_HEAD(&fi->gdirty_list);
881 INIT_LIST_HEAD(&fi->inmem_ilist);
882 INIT_LIST_HEAD(&fi->inmem_pages);
883 mutex_init(&fi->inmem_lock);
884 init_rwsem(&fi->i_gc_rwsem[READ]);
885 init_rwsem(&fi->i_gc_rwsem[WRITE]);
886 init_rwsem(&fi->i_mmap_sem);
887 init_rwsem(&fi->i_xattr_sem);
888
889 /* Will be used by directory only */
890 fi->i_dir_level = F2FS_SB(sb)->dir_level;
891
892 return &fi->vfs_inode;
893 }
894
895 static int f2fs_drop_inode(struct inode *inode)
896 {
897 int ret;
898 /*
899 * This is to avoid a deadlock condition like below.
900 * writeback_single_inode(inode)
901 * - f2fs_write_data_page
902 * - f2fs_gc -> iput -> evict
903 * - inode_wait_for_writeback(inode)
904 */
905 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
906 if (!inode->i_nlink && !is_bad_inode(inode)) {
907 /* to avoid evict_inode call simultaneously */
908 atomic_inc(&inode->i_count);
909 spin_unlock(&inode->i_lock);
910
911 /* some remained atomic pages should discarded */
912 if (f2fs_is_atomic_file(inode))
913 f2fs_drop_inmem_pages(inode);
914
915 /* should remain fi->extent_tree for writepage */
916 f2fs_destroy_extent_node(inode);
917
918 sb_start_intwrite(inode->i_sb);
919 f2fs_i_size_write(inode, 0);
920
921 f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
922 inode, NULL, 0, DATA);
923 truncate_inode_pages_final(inode->i_mapping);
924
925 if (F2FS_HAS_BLOCKS(inode))
926 f2fs_truncate(inode);
927
928 sb_end_intwrite(inode->i_sb);
929
930 spin_lock(&inode->i_lock);
931 atomic_dec(&inode->i_count);
932 }
933 trace_f2fs_drop_inode(inode, 0);
934 return 0;
935 }
936 ret = generic_drop_inode(inode);
937 trace_f2fs_drop_inode(inode, ret);
938 return ret;
939 }
940
941 int f2fs_inode_dirtied(struct inode *inode, bool sync)
942 {
943 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
944 int ret = 0;
945
946 spin_lock(&sbi->inode_lock[DIRTY_META]);
947 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
948 ret = 1;
949 } else {
950 set_inode_flag(inode, FI_DIRTY_INODE);
951 stat_inc_dirty_inode(sbi, DIRTY_META);
952 }
953 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
954 list_add_tail(&F2FS_I(inode)->gdirty_list,
955 &sbi->inode_list[DIRTY_META]);
956 inc_page_count(sbi, F2FS_DIRTY_IMETA);
957 }
958 spin_unlock(&sbi->inode_lock[DIRTY_META]);
959 return ret;
960 }
961
962 void f2fs_inode_synced(struct inode *inode)
963 {
964 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
965
966 spin_lock(&sbi->inode_lock[DIRTY_META]);
967 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
968 spin_unlock(&sbi->inode_lock[DIRTY_META]);
969 return;
970 }
971 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
972 list_del_init(&F2FS_I(inode)->gdirty_list);
973 dec_page_count(sbi, F2FS_DIRTY_IMETA);
974 }
975 clear_inode_flag(inode, FI_DIRTY_INODE);
976 clear_inode_flag(inode, FI_AUTO_RECOVER);
977 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
978 spin_unlock(&sbi->inode_lock[DIRTY_META]);
979 }
980
981 /*
982 * f2fs_dirty_inode() is called from __mark_inode_dirty()
983 *
984 * We should call set_dirty_inode to write the dirty inode through write_inode.
985 */
986 static void f2fs_dirty_inode(struct inode *inode, int flags)
987 {
988 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
989
990 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
991 inode->i_ino == F2FS_META_INO(sbi))
992 return;
993
994 if (flags == I_DIRTY_TIME)
995 return;
996
997 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
998 clear_inode_flag(inode, FI_AUTO_RECOVER);
999
1000 f2fs_inode_dirtied(inode, false);
1001 }
1002
1003 static void f2fs_free_inode(struct inode *inode)
1004 {
1005 fscrypt_free_inode(inode);
1006 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1007 }
1008
1009 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1010 {
1011 percpu_counter_destroy(&sbi->alloc_valid_block_count);
1012 percpu_counter_destroy(&sbi->total_valid_inode_count);
1013 }
1014
1015 static void destroy_device_list(struct f2fs_sb_info *sbi)
1016 {
1017 int i;
1018
1019 for (i = 0; i < sbi->s_ndevs; i++) {
1020 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1021 #ifdef CONFIG_BLK_DEV_ZONED
1022 kvfree(FDEV(i).blkz_seq);
1023 #endif
1024 }
1025 kvfree(sbi->devs);
1026 }
1027
1028 static void f2fs_put_super(struct super_block *sb)
1029 {
1030 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1031 int i;
1032 bool dropped;
1033
1034 f2fs_quota_off_umount(sb);
1035
1036 /* prevent remaining shrinker jobs */
1037 mutex_lock(&sbi->umount_mutex);
1038
1039 /*
1040 * We don't need to do checkpoint when superblock is clean.
1041 * But, the previous checkpoint was not done by umount, it needs to do
1042 * clean checkpoint again.
1043 */
1044 if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1045 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1046 struct cp_control cpc = {
1047 .reason = CP_UMOUNT,
1048 };
1049 f2fs_write_checkpoint(sbi, &cpc);
1050 }
1051
1052 /* be sure to wait for any on-going discard commands */
1053 dropped = f2fs_issue_discard_timeout(sbi);
1054
1055 if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1056 !sbi->discard_blks && !dropped) {
1057 struct cp_control cpc = {
1058 .reason = CP_UMOUNT | CP_TRIMMED,
1059 };
1060 f2fs_write_checkpoint(sbi, &cpc);
1061 }
1062
1063 /*
1064 * normally superblock is clean, so we need to release this.
1065 * In addition, EIO will skip do checkpoint, we need this as well.
1066 */
1067 f2fs_release_ino_entry(sbi, true);
1068
1069 f2fs_leave_shrinker(sbi);
1070 mutex_unlock(&sbi->umount_mutex);
1071
1072 /* our cp_error case, we can wait for any writeback page */
1073 f2fs_flush_merged_writes(sbi);
1074
1075 f2fs_wait_on_all_pages_writeback(sbi);
1076
1077 f2fs_bug_on(sbi, sbi->fsync_node_num);
1078
1079 iput(sbi->node_inode);
1080 sbi->node_inode = NULL;
1081
1082 iput(sbi->meta_inode);
1083 sbi->meta_inode = NULL;
1084
1085 /*
1086 * iput() can update stat information, if f2fs_write_checkpoint()
1087 * above failed with error.
1088 */
1089 f2fs_destroy_stats(sbi);
1090
1091 /* destroy f2fs internal modules */
1092 f2fs_destroy_node_manager(sbi);
1093 f2fs_destroy_segment_manager(sbi);
1094
1095 kvfree(sbi->ckpt);
1096
1097 f2fs_unregister_sysfs(sbi);
1098
1099 sb->s_fs_info = NULL;
1100 if (sbi->s_chksum_driver)
1101 crypto_free_shash(sbi->s_chksum_driver);
1102 kvfree(sbi->raw_super);
1103
1104 destroy_device_list(sbi);
1105 mempool_destroy(sbi->write_io_dummy);
1106 #ifdef CONFIG_QUOTA
1107 for (i = 0; i < MAXQUOTAS; i++)
1108 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1109 #endif
1110 destroy_percpu_info(sbi);
1111 for (i = 0; i < NR_PAGE_TYPE; i++)
1112 kvfree(sbi->write_io[i]);
1113 kvfree(sbi);
1114 }
1115
1116 int f2fs_sync_fs(struct super_block *sb, int sync)
1117 {
1118 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1119 int err = 0;
1120
1121 if (unlikely(f2fs_cp_error(sbi)))
1122 return 0;
1123 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1124 return 0;
1125
1126 trace_f2fs_sync_fs(sb, sync);
1127
1128 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1129 return -EAGAIN;
1130
1131 if (sync) {
1132 struct cp_control cpc;
1133
1134 cpc.reason = __get_cp_reason(sbi);
1135
1136 mutex_lock(&sbi->gc_mutex);
1137 err = f2fs_write_checkpoint(sbi, &cpc);
1138 mutex_unlock(&sbi->gc_mutex);
1139 }
1140 f2fs_trace_ios(NULL, 1);
1141
1142 return err;
1143 }
1144
1145 static int f2fs_freeze(struct super_block *sb)
1146 {
1147 if (f2fs_readonly(sb))
1148 return 0;
1149
1150 /* IO error happened before */
1151 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1152 return -EIO;
1153
1154 /* must be clean, since sync_filesystem() was already called */
1155 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1156 return -EINVAL;
1157 return 0;
1158 }
1159
1160 static int f2fs_unfreeze(struct super_block *sb)
1161 {
1162 return 0;
1163 }
1164
1165 #ifdef CONFIG_QUOTA
1166 static int f2fs_statfs_project(struct super_block *sb,
1167 kprojid_t projid, struct kstatfs *buf)
1168 {
1169 struct kqid qid;
1170 struct dquot *dquot;
1171 u64 limit;
1172 u64 curblock;
1173
1174 qid = make_kqid_projid(projid);
1175 dquot = dqget(sb, qid);
1176 if (IS_ERR(dquot))
1177 return PTR_ERR(dquot);
1178 spin_lock(&dquot->dq_dqb_lock);
1179
1180 limit = (dquot->dq_dqb.dqb_bsoftlimit ?
1181 dquot->dq_dqb.dqb_bsoftlimit :
1182 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
1183 if (limit && buf->f_blocks > limit) {
1184 curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
1185 buf->f_blocks = limit;
1186 buf->f_bfree = buf->f_bavail =
1187 (buf->f_blocks > curblock) ?
1188 (buf->f_blocks - curblock) : 0;
1189 }
1190
1191 limit = dquot->dq_dqb.dqb_isoftlimit ?
1192 dquot->dq_dqb.dqb_isoftlimit :
1193 dquot->dq_dqb.dqb_ihardlimit;
1194 if (limit && buf->f_files > limit) {
1195 buf->f_files = limit;
1196 buf->f_ffree =
1197 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1198 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1199 }
1200
1201 spin_unlock(&dquot->dq_dqb_lock);
1202 dqput(dquot);
1203 return 0;
1204 }
1205 #endif
1206
1207 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1208 {
1209 struct super_block *sb = dentry->d_sb;
1210 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1211 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1212 block_t total_count, user_block_count, start_count;
1213 u64 avail_node_count;
1214
1215 total_count = le64_to_cpu(sbi->raw_super->block_count);
1216 user_block_count = sbi->user_block_count;
1217 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1218 buf->f_type = F2FS_SUPER_MAGIC;
1219 buf->f_bsize = sbi->blocksize;
1220
1221 buf->f_blocks = total_count - start_count;
1222 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1223 sbi->current_reserved_blocks;
1224
1225 spin_lock(&sbi->stat_lock);
1226 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1227 buf->f_bfree = 0;
1228 else
1229 buf->f_bfree -= sbi->unusable_block_count;
1230 spin_unlock(&sbi->stat_lock);
1231
1232 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1233 buf->f_bavail = buf->f_bfree -
1234 F2FS_OPTION(sbi).root_reserved_blocks;
1235 else
1236 buf->f_bavail = 0;
1237
1238 avail_node_count = sbi->total_node_count - sbi->nquota_files -
1239 F2FS_RESERVED_NODE_NUM;
1240
1241 if (avail_node_count > user_block_count) {
1242 buf->f_files = user_block_count;
1243 buf->f_ffree = buf->f_bavail;
1244 } else {
1245 buf->f_files = avail_node_count;
1246 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1247 buf->f_bavail);
1248 }
1249
1250 buf->f_namelen = F2FS_NAME_LEN;
1251 buf->f_fsid.val[0] = (u32)id;
1252 buf->f_fsid.val[1] = (u32)(id >> 32);
1253
1254 #ifdef CONFIG_QUOTA
1255 if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1256 sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1257 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1258 }
1259 #endif
1260 return 0;
1261 }
1262
1263 static inline void f2fs_show_quota_options(struct seq_file *seq,
1264 struct super_block *sb)
1265 {
1266 #ifdef CONFIG_QUOTA
1267 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1268
1269 if (F2FS_OPTION(sbi).s_jquota_fmt) {
1270 char *fmtname = "";
1271
1272 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1273 case QFMT_VFS_OLD:
1274 fmtname = "vfsold";
1275 break;
1276 case QFMT_VFS_V0:
1277 fmtname = "vfsv0";
1278 break;
1279 case QFMT_VFS_V1:
1280 fmtname = "vfsv1";
1281 break;
1282 }
1283 seq_printf(seq, ",jqfmt=%s", fmtname);
1284 }
1285
1286 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1287 seq_show_option(seq, "usrjquota",
1288 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1289
1290 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1291 seq_show_option(seq, "grpjquota",
1292 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1293
1294 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1295 seq_show_option(seq, "prjjquota",
1296 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1297 #endif
1298 }
1299
1300 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1301 {
1302 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1303
1304 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
1305 if (test_opt(sbi, FORCE_FG_GC))
1306 seq_printf(seq, ",background_gc=%s", "sync");
1307 else
1308 seq_printf(seq, ",background_gc=%s", "on");
1309 } else {
1310 seq_printf(seq, ",background_gc=%s", "off");
1311 }
1312 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1313 seq_puts(seq, ",disable_roll_forward");
1314 if (test_opt(sbi, DISCARD))
1315 seq_puts(seq, ",discard");
1316 if (test_opt(sbi, NOHEAP))
1317 seq_puts(seq, ",no_heap");
1318 else
1319 seq_puts(seq, ",heap");
1320 #ifdef CONFIG_F2FS_FS_XATTR
1321 if (test_opt(sbi, XATTR_USER))
1322 seq_puts(seq, ",user_xattr");
1323 else
1324 seq_puts(seq, ",nouser_xattr");
1325 if (test_opt(sbi, INLINE_XATTR))
1326 seq_puts(seq, ",inline_xattr");
1327 else
1328 seq_puts(seq, ",noinline_xattr");
1329 if (test_opt(sbi, INLINE_XATTR_SIZE))
1330 seq_printf(seq, ",inline_xattr_size=%u",
1331 F2FS_OPTION(sbi).inline_xattr_size);
1332 #endif
1333 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1334 if (test_opt(sbi, POSIX_ACL))
1335 seq_puts(seq, ",acl");
1336 else
1337 seq_puts(seq, ",noacl");
1338 #endif
1339 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1340 seq_puts(seq, ",disable_ext_identify");
1341 if (test_opt(sbi, INLINE_DATA))
1342 seq_puts(seq, ",inline_data");
1343 else
1344 seq_puts(seq, ",noinline_data");
1345 if (test_opt(sbi, INLINE_DENTRY))
1346 seq_puts(seq, ",inline_dentry");
1347 else
1348 seq_puts(seq, ",noinline_dentry");
1349 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1350 seq_puts(seq, ",flush_merge");
1351 if (test_opt(sbi, NOBARRIER))
1352 seq_puts(seq, ",nobarrier");
1353 if (test_opt(sbi, FASTBOOT))
1354 seq_puts(seq, ",fastboot");
1355 if (test_opt(sbi, EXTENT_CACHE))
1356 seq_puts(seq, ",extent_cache");
1357 else
1358 seq_puts(seq, ",noextent_cache");
1359 if (test_opt(sbi, DATA_FLUSH))
1360 seq_puts(seq, ",data_flush");
1361
1362 seq_puts(seq, ",mode=");
1363 if (test_opt(sbi, ADAPTIVE))
1364 seq_puts(seq, "adaptive");
1365 else if (test_opt(sbi, LFS))
1366 seq_puts(seq, "lfs");
1367 seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1368 if (test_opt(sbi, RESERVE_ROOT))
1369 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1370 F2FS_OPTION(sbi).root_reserved_blocks,
1371 from_kuid_munged(&init_user_ns,
1372 F2FS_OPTION(sbi).s_resuid),
1373 from_kgid_munged(&init_user_ns,
1374 F2FS_OPTION(sbi).s_resgid));
1375 if (F2FS_IO_SIZE_BITS(sbi))
1376 seq_printf(seq, ",io_bits=%u",
1377 F2FS_OPTION(sbi).write_io_size_bits);
1378 #ifdef CONFIG_F2FS_FAULT_INJECTION
1379 if (test_opt(sbi, FAULT_INJECTION)) {
1380 seq_printf(seq, ",fault_injection=%u",
1381 F2FS_OPTION(sbi).fault_info.inject_rate);
1382 seq_printf(seq, ",fault_type=%u",
1383 F2FS_OPTION(sbi).fault_info.inject_type);
1384 }
1385 #endif
1386 #ifdef CONFIG_QUOTA
1387 if (test_opt(sbi, QUOTA))
1388 seq_puts(seq, ",quota");
1389 if (test_opt(sbi, USRQUOTA))
1390 seq_puts(seq, ",usrquota");
1391 if (test_opt(sbi, GRPQUOTA))
1392 seq_puts(seq, ",grpquota");
1393 if (test_opt(sbi, PRJQUOTA))
1394 seq_puts(seq, ",prjquota");
1395 #endif
1396 f2fs_show_quota_options(seq, sbi->sb);
1397 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
1398 seq_printf(seq, ",whint_mode=%s", "user-based");
1399 else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
1400 seq_printf(seq, ",whint_mode=%s", "fs-based");
1401 #ifdef CONFIG_FS_ENCRYPTION
1402 if (F2FS_OPTION(sbi).test_dummy_encryption)
1403 seq_puts(seq, ",test_dummy_encryption");
1404 #endif
1405
1406 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
1407 seq_printf(seq, ",alloc_mode=%s", "default");
1408 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
1409 seq_printf(seq, ",alloc_mode=%s", "reuse");
1410
1411 if (test_opt(sbi, DISABLE_CHECKPOINT))
1412 seq_puts(seq, ",checkpoint=disable");
1413
1414 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
1415 seq_printf(seq, ",fsync_mode=%s", "posix");
1416 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
1417 seq_printf(seq, ",fsync_mode=%s", "strict");
1418 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1419 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
1420 return 0;
1421 }
1422
1423 static void default_options(struct f2fs_sb_info *sbi)
1424 {
1425 /* init some FS parameters */
1426 F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1427 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1428 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1429 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1430 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1431 F2FS_OPTION(sbi).test_dummy_encryption = false;
1432 F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1433 F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
1434
1435 set_opt(sbi, BG_GC);
1436 set_opt(sbi, INLINE_XATTR);
1437 set_opt(sbi, INLINE_DATA);
1438 set_opt(sbi, INLINE_DENTRY);
1439 set_opt(sbi, EXTENT_CACHE);
1440 set_opt(sbi, NOHEAP);
1441 clear_opt(sbi, DISABLE_CHECKPOINT);
1442 sbi->sb->s_flags |= SB_LAZYTIME;
1443 set_opt(sbi, FLUSH_MERGE);
1444 set_opt(sbi, DISCARD);
1445 if (f2fs_sb_has_blkzoned(sbi))
1446 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1447 else
1448 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
1449
1450 #ifdef CONFIG_F2FS_FS_XATTR
1451 set_opt(sbi, XATTR_USER);
1452 #endif
1453 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1454 set_opt(sbi, POSIX_ACL);
1455 #endif
1456
1457 f2fs_build_fault_attr(sbi, 0, 0);
1458 }
1459
1460 #ifdef CONFIG_QUOTA
1461 static int f2fs_enable_quotas(struct super_block *sb);
1462 #endif
1463
1464 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1465 {
1466 unsigned int s_flags = sbi->sb->s_flags;
1467 struct cp_control cpc;
1468 int err = 0;
1469 int ret;
1470
1471 if (s_flags & SB_RDONLY) {
1472 f2fs_msg(sbi->sb, KERN_ERR,
1473 "checkpoint=disable on readonly fs");
1474 return -EINVAL;
1475 }
1476 sbi->sb->s_flags |= SB_ACTIVE;
1477
1478 f2fs_update_time(sbi, DISABLE_TIME);
1479
1480 while (!f2fs_time_over(sbi, DISABLE_TIME)) {
1481 mutex_lock(&sbi->gc_mutex);
1482 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1483 if (err == -ENODATA) {
1484 err = 0;
1485 break;
1486 }
1487 if (err && err != -EAGAIN)
1488 break;
1489 }
1490
1491 ret = sync_filesystem(sbi->sb);
1492 if (ret || err) {
1493 err = ret ? ret: err;
1494 goto restore_flag;
1495 }
1496
1497 if (f2fs_disable_cp_again(sbi)) {
1498 err = -EAGAIN;
1499 goto restore_flag;
1500 }
1501
1502 mutex_lock(&sbi->gc_mutex);
1503 cpc.reason = CP_PAUSE;
1504 set_sbi_flag(sbi, SBI_CP_DISABLED);
1505 err = f2fs_write_checkpoint(sbi, &cpc);
1506 if (err)
1507 goto out_unlock;
1508
1509 spin_lock(&sbi->stat_lock);
1510 sbi->unusable_block_count = 0;
1511 spin_unlock(&sbi->stat_lock);
1512
1513 out_unlock:
1514 mutex_unlock(&sbi->gc_mutex);
1515 restore_flag:
1516 sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1517 return err;
1518 }
1519
1520 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1521 {
1522 mutex_lock(&sbi->gc_mutex);
1523 f2fs_dirty_to_prefree(sbi);
1524
1525 clear_sbi_flag(sbi, SBI_CP_DISABLED);
1526 set_sbi_flag(sbi, SBI_IS_DIRTY);
1527 mutex_unlock(&sbi->gc_mutex);
1528
1529 f2fs_sync_fs(sbi->sb, 1);
1530 }
1531
1532 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1533 {
1534 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1535 struct f2fs_mount_info org_mount_opt;
1536 unsigned long old_sb_flags;
1537 int err;
1538 bool need_restart_gc = false;
1539 bool need_stop_gc = false;
1540 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
1541 bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1542 bool checkpoint_changed;
1543 #ifdef CONFIG_QUOTA
1544 int i, j;
1545 #endif
1546
1547 /*
1548 * Save the old mount options in case we
1549 * need to restore them.
1550 */
1551 org_mount_opt = sbi->mount_opt;
1552 old_sb_flags = sb->s_flags;
1553
1554 #ifdef CONFIG_QUOTA
1555 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
1556 for (i = 0; i < MAXQUOTAS; i++) {
1557 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1558 org_mount_opt.s_qf_names[i] =
1559 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1560 GFP_KERNEL);
1561 if (!org_mount_opt.s_qf_names[i]) {
1562 for (j = 0; j < i; j++)
1563 kvfree(org_mount_opt.s_qf_names[j]);
1564 return -ENOMEM;
1565 }
1566 } else {
1567 org_mount_opt.s_qf_names[i] = NULL;
1568 }
1569 }
1570 #endif
1571
1572 /* recover superblocks we couldn't write due to previous RO mount */
1573 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1574 err = f2fs_commit_super(sbi, false);
1575 f2fs_msg(sb, KERN_INFO,
1576 "Try to recover all the superblocks, ret: %d", err);
1577 if (!err)
1578 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1579 }
1580
1581 default_options(sbi);
1582
1583 /* parse mount options */
1584 err = parse_options(sb, data);
1585 if (err)
1586 goto restore_opts;
1587 checkpoint_changed =
1588 disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
1589
1590 /*
1591 * Previous and new state of filesystem is RO,
1592 * so skip checking GC and FLUSH_MERGE conditions.
1593 */
1594 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
1595 goto skip;
1596
1597 #ifdef CONFIG_QUOTA
1598 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
1599 err = dquot_suspend(sb, -1);
1600 if (err < 0)
1601 goto restore_opts;
1602 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
1603 /* dquot_resume needs RW */
1604 sb->s_flags &= ~SB_RDONLY;
1605 if (sb_any_quota_suspended(sb)) {
1606 dquot_resume(sb, -1);
1607 } else if (f2fs_sb_has_quota_ino(sbi)) {
1608 err = f2fs_enable_quotas(sb);
1609 if (err)
1610 goto restore_opts;
1611 }
1612 }
1613 #endif
1614 /* disallow enable/disable extent_cache dynamically */
1615 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1616 err = -EINVAL;
1617 f2fs_msg(sbi->sb, KERN_WARNING,
1618 "switch extent_cache option is not allowed");
1619 goto restore_opts;
1620 }
1621
1622 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1623 err = -EINVAL;
1624 f2fs_msg(sbi->sb, KERN_WARNING,
1625 "disabling checkpoint not compatible with read-only");
1626 goto restore_opts;
1627 }
1628
1629 /*
1630 * We stop the GC thread if FS is mounted as RO
1631 * or if background_gc = off is passed in mount
1632 * option. Also sync the filesystem.
1633 */
1634 if ((*flags & SB_RDONLY) || !test_opt(sbi, BG_GC)) {
1635 if (sbi->gc_thread) {
1636 f2fs_stop_gc_thread(sbi);
1637 need_restart_gc = true;
1638 }
1639 } else if (!sbi->gc_thread) {
1640 err = f2fs_start_gc_thread(sbi);
1641 if (err)
1642 goto restore_opts;
1643 need_stop_gc = true;
1644 }
1645
1646 if (*flags & SB_RDONLY ||
1647 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
1648 writeback_inodes_sb(sb, WB_REASON_SYNC);
1649 sync_inodes_sb(sb);
1650
1651 set_sbi_flag(sbi, SBI_IS_DIRTY);
1652 set_sbi_flag(sbi, SBI_IS_CLOSE);
1653 f2fs_sync_fs(sb, 1);
1654 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1655 }
1656
1657 if (checkpoint_changed) {
1658 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1659 err = f2fs_disable_checkpoint(sbi);
1660 if (err)
1661 goto restore_gc;
1662 } else {
1663 f2fs_enable_checkpoint(sbi);
1664 }
1665 }
1666
1667 /*
1668 * We stop issue flush thread if FS is mounted as RO
1669 * or if flush_merge is not passed in mount option.
1670 */
1671 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
1672 clear_opt(sbi, FLUSH_MERGE);
1673 f2fs_destroy_flush_cmd_control(sbi, false);
1674 } else {
1675 err = f2fs_create_flush_cmd_control(sbi);
1676 if (err)
1677 goto restore_gc;
1678 }
1679 skip:
1680 #ifdef CONFIG_QUOTA
1681 /* Release old quota file names */
1682 for (i = 0; i < MAXQUOTAS; i++)
1683 kvfree(org_mount_opt.s_qf_names[i]);
1684 #endif
1685 /* Update the POSIXACL Flag */
1686 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1687 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
1688
1689 limit_reserve_root(sbi);
1690 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
1691 return 0;
1692 restore_gc:
1693 if (need_restart_gc) {
1694 if (f2fs_start_gc_thread(sbi))
1695 f2fs_msg(sbi->sb, KERN_WARNING,
1696 "background gc thread has stopped");
1697 } else if (need_stop_gc) {
1698 f2fs_stop_gc_thread(sbi);
1699 }
1700 restore_opts:
1701 #ifdef CONFIG_QUOTA
1702 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
1703 for (i = 0; i < MAXQUOTAS; i++) {
1704 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
1705 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
1706 }
1707 #endif
1708 sbi->mount_opt = org_mount_opt;
1709 sb->s_flags = old_sb_flags;
1710 return err;
1711 }
1712
1713 #ifdef CONFIG_QUOTA
1714 /* Read data from quotafile */
1715 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1716 size_t len, loff_t off)
1717 {
1718 struct inode *inode = sb_dqopt(sb)->files[type];
1719 struct address_space *mapping = inode->i_mapping;
1720 block_t blkidx = F2FS_BYTES_TO_BLK(off);
1721 int offset = off & (sb->s_blocksize - 1);
1722 int tocopy;
1723 size_t toread;
1724 loff_t i_size = i_size_read(inode);
1725 struct page *page;
1726 char *kaddr;
1727
1728 if (off > i_size)
1729 return 0;
1730
1731 if (off + len > i_size)
1732 len = i_size - off;
1733 toread = len;
1734 while (toread > 0) {
1735 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1736 repeat:
1737 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
1738 if (IS_ERR(page)) {
1739 if (PTR_ERR(page) == -ENOMEM) {
1740 congestion_wait(BLK_RW_ASYNC, HZ/50);
1741 goto repeat;
1742 }
1743 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1744 return PTR_ERR(page);
1745 }
1746
1747 lock_page(page);
1748
1749 if (unlikely(page->mapping != mapping)) {
1750 f2fs_put_page(page, 1);
1751 goto repeat;
1752 }
1753 if (unlikely(!PageUptodate(page))) {
1754 f2fs_put_page(page, 1);
1755 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1756 return -EIO;
1757 }
1758
1759 kaddr = kmap_atomic(page);
1760 memcpy(data, kaddr + offset, tocopy);
1761 kunmap_atomic(kaddr);
1762 f2fs_put_page(page, 1);
1763
1764 offset = 0;
1765 toread -= tocopy;
1766 data += tocopy;
1767 blkidx++;
1768 }
1769 return len;
1770 }
1771
1772 /* Write to quotafile */
1773 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
1774 const char *data, size_t len, loff_t off)
1775 {
1776 struct inode *inode = sb_dqopt(sb)->files[type];
1777 struct address_space *mapping = inode->i_mapping;
1778 const struct address_space_operations *a_ops = mapping->a_ops;
1779 int offset = off & (sb->s_blocksize - 1);
1780 size_t towrite = len;
1781 struct page *page;
1782 char *kaddr;
1783 int err = 0;
1784 int tocopy;
1785
1786 while (towrite > 0) {
1787 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
1788 towrite);
1789 retry:
1790 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
1791 &page, NULL);
1792 if (unlikely(err)) {
1793 if (err == -ENOMEM) {
1794 congestion_wait(BLK_RW_ASYNC, HZ/50);
1795 goto retry;
1796 }
1797 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1798 break;
1799 }
1800
1801 kaddr = kmap_atomic(page);
1802 memcpy(kaddr + offset, data, tocopy);
1803 kunmap_atomic(kaddr);
1804 flush_dcache_page(page);
1805
1806 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
1807 page, NULL);
1808 offset = 0;
1809 towrite -= tocopy;
1810 off += tocopy;
1811 data += tocopy;
1812 cond_resched();
1813 }
1814
1815 if (len == towrite)
1816 return err;
1817 inode->i_mtime = inode->i_ctime = current_time(inode);
1818 f2fs_mark_inode_dirty_sync(inode, false);
1819 return len - towrite;
1820 }
1821
1822 static struct dquot **f2fs_get_dquots(struct inode *inode)
1823 {
1824 return F2FS_I(inode)->i_dquot;
1825 }
1826
1827 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
1828 {
1829 return &F2FS_I(inode)->i_reserved_quota;
1830 }
1831
1832 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
1833 {
1834 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
1835 f2fs_msg(sbi->sb, KERN_ERR,
1836 "quota sysfile may be corrupted, skip loading it");
1837 return 0;
1838 }
1839
1840 return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
1841 F2FS_OPTION(sbi).s_jquota_fmt, type);
1842 }
1843
1844 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
1845 {
1846 int enabled = 0;
1847 int i, err;
1848
1849 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
1850 err = f2fs_enable_quotas(sbi->sb);
1851 if (err) {
1852 f2fs_msg(sbi->sb, KERN_ERR,
1853 "Cannot turn on quota_ino: %d", err);
1854 return 0;
1855 }
1856 return 1;
1857 }
1858
1859 for (i = 0; i < MAXQUOTAS; i++) {
1860 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1861 err = f2fs_quota_on_mount(sbi, i);
1862 if (!err) {
1863 enabled = 1;
1864 continue;
1865 }
1866 f2fs_msg(sbi->sb, KERN_ERR,
1867 "Cannot turn on quotas: %d on %d", err, i);
1868 }
1869 }
1870 return enabled;
1871 }
1872
1873 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
1874 unsigned int flags)
1875 {
1876 struct inode *qf_inode;
1877 unsigned long qf_inum;
1878 int err;
1879
1880 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
1881
1882 qf_inum = f2fs_qf_ino(sb, type);
1883 if (!qf_inum)
1884 return -EPERM;
1885
1886 qf_inode = f2fs_iget(sb, qf_inum);
1887 if (IS_ERR(qf_inode)) {
1888 f2fs_msg(sb, KERN_ERR,
1889 "Bad quota inode %u:%lu", type, qf_inum);
1890 return PTR_ERR(qf_inode);
1891 }
1892
1893 /* Don't account quota for quota files to avoid recursion */
1894 qf_inode->i_flags |= S_NOQUOTA;
1895 err = dquot_enable(qf_inode, type, format_id, flags);
1896 iput(qf_inode);
1897 return err;
1898 }
1899
1900 static int f2fs_enable_quotas(struct super_block *sb)
1901 {
1902 int type, err = 0;
1903 unsigned long qf_inum;
1904 bool quota_mopt[MAXQUOTAS] = {
1905 test_opt(F2FS_SB(sb), USRQUOTA),
1906 test_opt(F2FS_SB(sb), GRPQUOTA),
1907 test_opt(F2FS_SB(sb), PRJQUOTA),
1908 };
1909
1910 if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
1911 f2fs_msg(sb, KERN_ERR,
1912 "quota file may be corrupted, skip loading it");
1913 return 0;
1914 }
1915
1916 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1917
1918 for (type = 0; type < MAXQUOTAS; type++) {
1919 qf_inum = f2fs_qf_ino(sb, type);
1920 if (qf_inum) {
1921 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
1922 DQUOT_USAGE_ENABLED |
1923 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
1924 if (err) {
1925 f2fs_msg(sb, KERN_ERR,
1926 "Failed to enable quota tracking "
1927 "(type=%d, err=%d). Please run "
1928 "fsck to fix.", type, err);
1929 for (type--; type >= 0; type--)
1930 dquot_quota_off(sb, type);
1931 set_sbi_flag(F2FS_SB(sb),
1932 SBI_QUOTA_NEED_REPAIR);
1933 return err;
1934 }
1935 }
1936 }
1937 return 0;
1938 }
1939
1940 int f2fs_quota_sync(struct super_block *sb, int type)
1941 {
1942 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1943 struct quota_info *dqopt = sb_dqopt(sb);
1944 int cnt;
1945 int ret;
1946
1947 ret = dquot_writeback_dquots(sb, type);
1948 if (ret)
1949 goto out;
1950
1951 /*
1952 * Now when everything is written we can discard the pagecache so
1953 * that userspace sees the changes.
1954 */
1955 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
1956 struct address_space *mapping;
1957
1958 if (type != -1 && cnt != type)
1959 continue;
1960 if (!sb_has_quota_active(sb, cnt))
1961 continue;
1962
1963 mapping = dqopt->files[cnt]->i_mapping;
1964
1965 ret = filemap_fdatawrite(mapping);
1966 if (ret)
1967 goto out;
1968
1969 /* if we are using journalled quota */
1970 if (is_journalled_quota(sbi))
1971 continue;
1972
1973 ret = filemap_fdatawait(mapping);
1974 if (ret)
1975 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1976
1977 inode_lock(dqopt->files[cnt]);
1978 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
1979 inode_unlock(dqopt->files[cnt]);
1980 }
1981 out:
1982 if (ret)
1983 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1984 return ret;
1985 }
1986
1987 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
1988 const struct path *path)
1989 {
1990 struct inode *inode;
1991 int err;
1992
1993 err = f2fs_quota_sync(sb, type);
1994 if (err)
1995 return err;
1996
1997 err = dquot_quota_on(sb, type, format_id, path);
1998 if (err)
1999 return err;
2000
2001 inode = d_inode(path->dentry);
2002
2003 inode_lock(inode);
2004 F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2005 f2fs_set_inode_flags(inode);
2006 inode_unlock(inode);
2007 f2fs_mark_inode_dirty_sync(inode, false);
2008
2009 return 0;
2010 }
2011
2012 static int f2fs_quota_off(struct super_block *sb, int type)
2013 {
2014 struct inode *inode = sb_dqopt(sb)->files[type];
2015 int err;
2016
2017 if (!inode || !igrab(inode))
2018 return dquot_quota_off(sb, type);
2019
2020 err = f2fs_quota_sync(sb, type);
2021 if (err)
2022 goto out_put;
2023
2024 err = dquot_quota_off(sb, type);
2025 if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2026 goto out_put;
2027
2028 inode_lock(inode);
2029 F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2030 f2fs_set_inode_flags(inode);
2031 inode_unlock(inode);
2032 f2fs_mark_inode_dirty_sync(inode, false);
2033 out_put:
2034 iput(inode);
2035 return err;
2036 }
2037
2038 void f2fs_quota_off_umount(struct super_block *sb)
2039 {
2040 int type;
2041 int err;
2042
2043 for (type = 0; type < MAXQUOTAS; type++) {
2044 err = f2fs_quota_off(sb, type);
2045 if (err) {
2046 int ret = dquot_quota_off(sb, type);
2047
2048 f2fs_msg(sb, KERN_ERR,
2049 "Fail to turn off disk quota "
2050 "(type: %d, err: %d, ret:%d), Please "
2051 "run fsck to fix it.", type, err, ret);
2052 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2053 }
2054 }
2055 /*
2056 * In case of checkpoint=disable, we must flush quota blocks.
2057 * This can cause NULL exception for node_inode in end_io, since
2058 * put_super already dropped it.
2059 */
2060 sync_filesystem(sb);
2061 }
2062
2063 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2064 {
2065 struct quota_info *dqopt = sb_dqopt(sb);
2066 int type;
2067
2068 for (type = 0; type < MAXQUOTAS; type++) {
2069 if (!dqopt->files[type])
2070 continue;
2071 f2fs_inode_synced(dqopt->files[type]);
2072 }
2073 }
2074
2075 static int f2fs_dquot_commit(struct dquot *dquot)
2076 {
2077 int ret;
2078
2079 ret = dquot_commit(dquot);
2080 if (ret < 0)
2081 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2082 return ret;
2083 }
2084
2085 static int f2fs_dquot_acquire(struct dquot *dquot)
2086 {
2087 int ret;
2088
2089 ret = dquot_acquire(dquot);
2090 if (ret < 0)
2091 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2092
2093 return ret;
2094 }
2095
2096 static int f2fs_dquot_release(struct dquot *dquot)
2097 {
2098 int ret;
2099
2100 ret = dquot_release(dquot);
2101 if (ret < 0)
2102 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2103 return ret;
2104 }
2105
2106 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2107 {
2108 struct super_block *sb = dquot->dq_sb;
2109 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2110 int ret;
2111
2112 ret = dquot_mark_dquot_dirty(dquot);
2113
2114 /* if we are using journalled quota */
2115 if (is_journalled_quota(sbi))
2116 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2117
2118 return ret;
2119 }
2120
2121 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2122 {
2123 int ret;
2124
2125 ret = dquot_commit_info(sb, type);
2126 if (ret < 0)
2127 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2128 return ret;
2129 }
2130
2131 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2132 {
2133 *projid = F2FS_I(inode)->i_projid;
2134 return 0;
2135 }
2136
2137 static const struct dquot_operations f2fs_quota_operations = {
2138 .get_reserved_space = f2fs_get_reserved_space,
2139 .write_dquot = f2fs_dquot_commit,
2140 .acquire_dquot = f2fs_dquot_acquire,
2141 .release_dquot = f2fs_dquot_release,
2142 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
2143 .write_info = f2fs_dquot_commit_info,
2144 .alloc_dquot = dquot_alloc,
2145 .destroy_dquot = dquot_destroy,
2146 .get_projid = f2fs_get_projid,
2147 .get_next_id = dquot_get_next_id,
2148 };
2149
2150 static const struct quotactl_ops f2fs_quotactl_ops = {
2151 .quota_on = f2fs_quota_on,
2152 .quota_off = f2fs_quota_off,
2153 .quota_sync = f2fs_quota_sync,
2154 .get_state = dquot_get_state,
2155 .set_info = dquot_set_dqinfo,
2156 .get_dqblk = dquot_get_dqblk,
2157 .set_dqblk = dquot_set_dqblk,
2158 .get_nextdqblk = dquot_get_next_dqblk,
2159 };
2160 #else
2161 int f2fs_quota_sync(struct super_block *sb, int type)
2162 {
2163 return 0;
2164 }
2165
2166 void f2fs_quota_off_umount(struct super_block *sb)
2167 {
2168 }
2169 #endif
2170
2171 static const struct super_operations f2fs_sops = {
2172 .alloc_inode = f2fs_alloc_inode,
2173 .free_inode = f2fs_free_inode,
2174 .drop_inode = f2fs_drop_inode,
2175 .write_inode = f2fs_write_inode,
2176 .dirty_inode = f2fs_dirty_inode,
2177 .show_options = f2fs_show_options,
2178 #ifdef CONFIG_QUOTA
2179 .quota_read = f2fs_quota_read,
2180 .quota_write = f2fs_quota_write,
2181 .get_dquots = f2fs_get_dquots,
2182 #endif
2183 .evict_inode = f2fs_evict_inode,
2184 .put_super = f2fs_put_super,
2185 .sync_fs = f2fs_sync_fs,
2186 .freeze_fs = f2fs_freeze,
2187 .unfreeze_fs = f2fs_unfreeze,
2188 .statfs = f2fs_statfs,
2189 .remount_fs = f2fs_remount,
2190 };
2191
2192 #ifdef CONFIG_FS_ENCRYPTION
2193 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2194 {
2195 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2196 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2197 ctx, len, NULL);
2198 }
2199
2200 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2201 void *fs_data)
2202 {
2203 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2204
2205 /*
2206 * Encrypting the root directory is not allowed because fsck
2207 * expects lost+found directory to exist and remain unencrypted
2208 * if LOST_FOUND feature is enabled.
2209 *
2210 */
2211 if (f2fs_sb_has_lost_found(sbi) &&
2212 inode->i_ino == F2FS_ROOT_INO(sbi))
2213 return -EPERM;
2214
2215 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2216 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2217 ctx, len, fs_data, XATTR_CREATE);
2218 }
2219
2220 static bool f2fs_dummy_context(struct inode *inode)
2221 {
2222 return DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(inode));
2223 }
2224
2225 static const struct fscrypt_operations f2fs_cryptops = {
2226 .key_prefix = "f2fs:",
2227 .get_context = f2fs_get_context,
2228 .set_context = f2fs_set_context,
2229 .dummy_context = f2fs_dummy_context,
2230 .empty_dir = f2fs_empty_dir,
2231 .max_namelen = F2FS_NAME_LEN,
2232 };
2233 #endif
2234
2235 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2236 u64 ino, u32 generation)
2237 {
2238 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2239 struct inode *inode;
2240
2241 if (f2fs_check_nid_range(sbi, ino))
2242 return ERR_PTR(-ESTALE);
2243
2244 /*
2245 * f2fs_iget isn't quite right if the inode is currently unallocated!
2246 * However f2fs_iget currently does appropriate checks to handle stale
2247 * inodes so everything is OK.
2248 */
2249 inode = f2fs_iget(sb, ino);
2250 if (IS_ERR(inode))
2251 return ERR_CAST(inode);
2252 if (unlikely(generation && inode->i_generation != generation)) {
2253 /* we didn't find the right inode.. */
2254 iput(inode);
2255 return ERR_PTR(-ESTALE);
2256 }
2257 return inode;
2258 }
2259
2260 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2261 int fh_len, int fh_type)
2262 {
2263 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2264 f2fs_nfs_get_inode);
2265 }
2266
2267 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2268 int fh_len, int fh_type)
2269 {
2270 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2271 f2fs_nfs_get_inode);
2272 }
2273
2274 static const struct export_operations f2fs_export_ops = {
2275 .fh_to_dentry = f2fs_fh_to_dentry,
2276 .fh_to_parent = f2fs_fh_to_parent,
2277 .get_parent = f2fs_get_parent,
2278 };
2279
2280 static loff_t max_file_blocks(void)
2281 {
2282 loff_t result = 0;
2283 loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
2284
2285 /*
2286 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
2287 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
2288 * space in inode.i_addr, it will be more safe to reassign
2289 * result as zero.
2290 */
2291
2292 /* two direct node blocks */
2293 result += (leaf_count * 2);
2294
2295 /* two indirect node blocks */
2296 leaf_count *= NIDS_PER_BLOCK;
2297 result += (leaf_count * 2);
2298
2299 /* one double indirect node block */
2300 leaf_count *= NIDS_PER_BLOCK;
2301 result += leaf_count;
2302
2303 return result;
2304 }
2305
2306 static int __f2fs_commit_super(struct buffer_head *bh,
2307 struct f2fs_super_block *super)
2308 {
2309 lock_buffer(bh);
2310 if (super)
2311 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
2312 set_buffer_dirty(bh);
2313 unlock_buffer(bh);
2314
2315 /* it's rare case, we can do fua all the time */
2316 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
2317 }
2318
2319 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
2320 struct buffer_head *bh)
2321 {
2322 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2323 (bh->b_data + F2FS_SUPER_OFFSET);
2324 struct super_block *sb = sbi->sb;
2325 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2326 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2327 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2328 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2329 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2330 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2331 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2332 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2333 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2334 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2335 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2336 u32 segment_count = le32_to_cpu(raw_super->segment_count);
2337 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2338 u64 main_end_blkaddr = main_blkaddr +
2339 (segment_count_main << log_blocks_per_seg);
2340 u64 seg_end_blkaddr = segment0_blkaddr +
2341 (segment_count << log_blocks_per_seg);
2342
2343 if (segment0_blkaddr != cp_blkaddr) {
2344 f2fs_msg(sb, KERN_INFO,
2345 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2346 segment0_blkaddr, cp_blkaddr);
2347 return true;
2348 }
2349
2350 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2351 sit_blkaddr) {
2352 f2fs_msg(sb, KERN_INFO,
2353 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2354 cp_blkaddr, sit_blkaddr,
2355 segment_count_ckpt << log_blocks_per_seg);
2356 return true;
2357 }
2358
2359 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2360 nat_blkaddr) {
2361 f2fs_msg(sb, KERN_INFO,
2362 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2363 sit_blkaddr, nat_blkaddr,
2364 segment_count_sit << log_blocks_per_seg);
2365 return true;
2366 }
2367
2368 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2369 ssa_blkaddr) {
2370 f2fs_msg(sb, KERN_INFO,
2371 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2372 nat_blkaddr, ssa_blkaddr,
2373 segment_count_nat << log_blocks_per_seg);
2374 return true;
2375 }
2376
2377 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2378 main_blkaddr) {
2379 f2fs_msg(sb, KERN_INFO,
2380 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2381 ssa_blkaddr, main_blkaddr,
2382 segment_count_ssa << log_blocks_per_seg);
2383 return true;
2384 }
2385
2386 if (main_end_blkaddr > seg_end_blkaddr) {
2387 f2fs_msg(sb, KERN_INFO,
2388 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
2389 main_blkaddr,
2390 segment0_blkaddr +
2391 (segment_count << log_blocks_per_seg),
2392 segment_count_main << log_blocks_per_seg);
2393 return true;
2394 } else if (main_end_blkaddr < seg_end_blkaddr) {
2395 int err = 0;
2396 char *res;
2397
2398 /* fix in-memory information all the time */
2399 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2400 segment0_blkaddr) >> log_blocks_per_seg);
2401
2402 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
2403 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2404 res = "internally";
2405 } else {
2406 err = __f2fs_commit_super(bh, NULL);
2407 res = err ? "failed" : "done";
2408 }
2409 f2fs_msg(sb, KERN_INFO,
2410 "Fix alignment : %s, start(%u) end(%u) block(%u)",
2411 res, main_blkaddr,
2412 segment0_blkaddr +
2413 (segment_count << log_blocks_per_seg),
2414 segment_count_main << log_blocks_per_seg);
2415 if (err)
2416 return true;
2417 }
2418 return false;
2419 }
2420
2421 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
2422 struct buffer_head *bh)
2423 {
2424 block_t segment_count, segs_per_sec, secs_per_zone;
2425 block_t total_sections, blocks_per_seg;
2426 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2427 (bh->b_data + F2FS_SUPER_OFFSET);
2428 struct super_block *sb = sbi->sb;
2429 unsigned int blocksize;
2430 size_t crc_offset = 0;
2431 __u32 crc = 0;
2432
2433 /* Check checksum_offset and crc in superblock */
2434 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
2435 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2436 if (crc_offset !=
2437 offsetof(struct f2fs_super_block, crc)) {
2438 f2fs_msg(sb, KERN_INFO,
2439 "Invalid SB checksum offset: %zu",
2440 crc_offset);
2441 return 1;
2442 }
2443 crc = le32_to_cpu(raw_super->crc);
2444 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2445 f2fs_msg(sb, KERN_INFO,
2446 "Invalid SB checksum value: %u", crc);
2447 return 1;
2448 }
2449 }
2450
2451 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
2452 f2fs_msg(sb, KERN_INFO,
2453 "Magic Mismatch, valid(0x%x) - read(0x%x)",
2454 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
2455 return 1;
2456 }
2457
2458 /* Currently, support only 4KB page cache size */
2459 if (F2FS_BLKSIZE != PAGE_SIZE) {
2460 f2fs_msg(sb, KERN_INFO,
2461 "Invalid page_cache_size (%lu), supports only 4KB",
2462 PAGE_SIZE);
2463 return 1;
2464 }
2465
2466 /* Currently, support only 4KB block size */
2467 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
2468 if (blocksize != F2FS_BLKSIZE) {
2469 f2fs_msg(sb, KERN_INFO,
2470 "Invalid blocksize (%u), supports only 4KB",
2471 blocksize);
2472 return 1;
2473 }
2474
2475 /* check log blocks per segment */
2476 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2477 f2fs_msg(sb, KERN_INFO,
2478 "Invalid log blocks per segment (%u)",
2479 le32_to_cpu(raw_super->log_blocks_per_seg));
2480 return 1;
2481 }
2482
2483 /* Currently, support 512/1024/2048/4096 bytes sector size */
2484 if (le32_to_cpu(raw_super->log_sectorsize) >
2485 F2FS_MAX_LOG_SECTOR_SIZE ||
2486 le32_to_cpu(raw_super->log_sectorsize) <
2487 F2FS_MIN_LOG_SECTOR_SIZE) {
2488 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
2489 le32_to_cpu(raw_super->log_sectorsize));
2490 return 1;
2491 }
2492 if (le32_to_cpu(raw_super->log_sectors_per_block) +
2493 le32_to_cpu(raw_super->log_sectorsize) !=
2494 F2FS_MAX_LOG_SECTOR_SIZE) {
2495 f2fs_msg(sb, KERN_INFO,
2496 "Invalid log sectors per block(%u) log sectorsize(%u)",
2497 le32_to_cpu(raw_super->log_sectors_per_block),
2498 le32_to_cpu(raw_super->log_sectorsize));
2499 return 1;
2500 }
2501
2502 segment_count = le32_to_cpu(raw_super->segment_count);
2503 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2504 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2505 total_sections = le32_to_cpu(raw_super->section_count);
2506
2507 /* blocks_per_seg should be 512, given the above check */
2508 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2509
2510 if (segment_count > F2FS_MAX_SEGMENT ||
2511 segment_count < F2FS_MIN_SEGMENTS) {
2512 f2fs_msg(sb, KERN_INFO,
2513 "Invalid segment count (%u)",
2514 segment_count);
2515 return 1;
2516 }
2517
2518 if (total_sections > segment_count ||
2519 total_sections < F2FS_MIN_SEGMENTS ||
2520 segs_per_sec > segment_count || !segs_per_sec) {
2521 f2fs_msg(sb, KERN_INFO,
2522 "Invalid segment/section count (%u, %u x %u)",
2523 segment_count, total_sections, segs_per_sec);
2524 return 1;
2525 }
2526
2527 if ((segment_count / segs_per_sec) < total_sections) {
2528 f2fs_msg(sb, KERN_INFO,
2529 "Small segment_count (%u < %u * %u)",
2530 segment_count, segs_per_sec, total_sections);
2531 return 1;
2532 }
2533
2534 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
2535 f2fs_msg(sb, KERN_INFO,
2536 "Wrong segment_count / block_count (%u > %llu)",
2537 segment_count, le64_to_cpu(raw_super->block_count));
2538 return 1;
2539 }
2540
2541 if (secs_per_zone > total_sections || !secs_per_zone) {
2542 f2fs_msg(sb, KERN_INFO,
2543 "Wrong secs_per_zone / total_sections (%u, %u)",
2544 secs_per_zone, total_sections);
2545 return 1;
2546 }
2547 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2548 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2549 (le32_to_cpu(raw_super->extension_count) +
2550 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2551 f2fs_msg(sb, KERN_INFO,
2552 "Corrupted extension count (%u + %u > %u)",
2553 le32_to_cpu(raw_super->extension_count),
2554 raw_super->hot_ext_count,
2555 F2FS_MAX_EXTENSION);
2556 return 1;
2557 }
2558
2559 if (le32_to_cpu(raw_super->cp_payload) >
2560 (blocks_per_seg - F2FS_CP_PACKS)) {
2561 f2fs_msg(sb, KERN_INFO,
2562 "Insane cp_payload (%u > %u)",
2563 le32_to_cpu(raw_super->cp_payload),
2564 blocks_per_seg - F2FS_CP_PACKS);
2565 return 1;
2566 }
2567
2568 /* check reserved ino info */
2569 if (le32_to_cpu(raw_super->node_ino) != 1 ||
2570 le32_to_cpu(raw_super->meta_ino) != 2 ||
2571 le32_to_cpu(raw_super->root_ino) != 3) {
2572 f2fs_msg(sb, KERN_INFO,
2573 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2574 le32_to_cpu(raw_super->node_ino),
2575 le32_to_cpu(raw_super->meta_ino),
2576 le32_to_cpu(raw_super->root_ino));
2577 return 1;
2578 }
2579
2580 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
2581 if (sanity_check_area_boundary(sbi, bh))
2582 return 1;
2583
2584 return 0;
2585 }
2586
2587 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
2588 {
2589 unsigned int total, fsmeta;
2590 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2591 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2592 unsigned int ovp_segments, reserved_segments;
2593 unsigned int main_segs, blocks_per_seg;
2594 unsigned int sit_segs, nat_segs;
2595 unsigned int sit_bitmap_size, nat_bitmap_size;
2596 unsigned int log_blocks_per_seg;
2597 unsigned int segment_count_main;
2598 unsigned int cp_pack_start_sum, cp_payload;
2599 block_t user_block_count, valid_user_blocks;
2600 block_t avail_node_count, valid_node_count;
2601 int i, j;
2602
2603 total = le32_to_cpu(raw_super->segment_count);
2604 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
2605 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2606 fsmeta += sit_segs;
2607 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2608 fsmeta += nat_segs;
2609 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2610 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2611
2612 if (unlikely(fsmeta >= total))
2613 return 1;
2614
2615 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2616 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2617
2618 if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2619 ovp_segments == 0 || reserved_segments == 0)) {
2620 f2fs_msg(sbi->sb, KERN_ERR,
2621 "Wrong layout: check mkfs.f2fs version");
2622 return 1;
2623 }
2624
2625 user_block_count = le64_to_cpu(ckpt->user_block_count);
2626 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2627 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2628 if (!user_block_count || user_block_count >=
2629 segment_count_main << log_blocks_per_seg) {
2630 f2fs_msg(sbi->sb, KERN_ERR,
2631 "Wrong user_block_count: %u", user_block_count);
2632 return 1;
2633 }
2634
2635 valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
2636 if (valid_user_blocks > user_block_count) {
2637 f2fs_msg(sbi->sb, KERN_ERR,
2638 "Wrong valid_user_blocks: %u, user_block_count: %u",
2639 valid_user_blocks, user_block_count);
2640 return 1;
2641 }
2642
2643 valid_node_count = le32_to_cpu(ckpt->valid_node_count);
2644 avail_node_count = sbi->total_node_count - sbi->nquota_files -
2645 F2FS_RESERVED_NODE_NUM;
2646 if (valid_node_count > avail_node_count) {
2647 f2fs_msg(sbi->sb, KERN_ERR,
2648 "Wrong valid_node_count: %u, avail_node_count: %u",
2649 valid_node_count, avail_node_count);
2650 return 1;
2651 }
2652
2653 main_segs = le32_to_cpu(raw_super->segment_count_main);
2654 blocks_per_seg = sbi->blocks_per_seg;
2655
2656 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2657 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2658 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2659 return 1;
2660 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2661 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2662 le32_to_cpu(ckpt->cur_node_segno[j])) {
2663 f2fs_msg(sbi->sb, KERN_ERR,
2664 "Node segment (%u, %u) has the same "
2665 "segno: %u", i, j,
2666 le32_to_cpu(ckpt->cur_node_segno[i]));
2667 return 1;
2668 }
2669 }
2670 }
2671 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2672 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2673 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2674 return 1;
2675 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2676 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2677 le32_to_cpu(ckpt->cur_data_segno[j])) {
2678 f2fs_msg(sbi->sb, KERN_ERR,
2679 "Data segment (%u, %u) has the same "
2680 "segno: %u", i, j,
2681 le32_to_cpu(ckpt->cur_data_segno[i]));
2682 return 1;
2683 }
2684 }
2685 }
2686 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2687 for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
2688 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2689 le32_to_cpu(ckpt->cur_data_segno[j])) {
2690 f2fs_msg(sbi->sb, KERN_ERR,
2691 "Data segment (%u) and Data segment (%u)"
2692 " has the same segno: %u", i, j,
2693 le32_to_cpu(ckpt->cur_node_segno[i]));
2694 return 1;
2695 }
2696 }
2697 }
2698
2699 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2700 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
2701
2702 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2703 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2704 f2fs_msg(sbi->sb, KERN_ERR,
2705 "Wrong bitmap size: sit: %u, nat:%u",
2706 sit_bitmap_size, nat_bitmap_size);
2707 return 1;
2708 }
2709
2710 cp_pack_start_sum = __start_sum_addr(sbi);
2711 cp_payload = __cp_payload(sbi);
2712 if (cp_pack_start_sum < cp_payload + 1 ||
2713 cp_pack_start_sum > blocks_per_seg - 1 -
2714 NR_CURSEG_TYPE) {
2715 f2fs_msg(sbi->sb, KERN_ERR,
2716 "Wrong cp_pack_start_sum: %u",
2717 cp_pack_start_sum);
2718 return 1;
2719 }
2720
2721 if (unlikely(f2fs_cp_error(sbi))) {
2722 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
2723 return 1;
2724 }
2725 return 0;
2726 }
2727
2728 static void init_sb_info(struct f2fs_sb_info *sbi)
2729 {
2730 struct f2fs_super_block *raw_super = sbi->raw_super;
2731 int i;
2732
2733 sbi->log_sectors_per_block =
2734 le32_to_cpu(raw_super->log_sectors_per_block);
2735 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
2736 sbi->blocksize = 1 << sbi->log_blocksize;
2737 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2738 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
2739 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2740 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2741 sbi->total_sections = le32_to_cpu(raw_super->section_count);
2742 sbi->total_node_count =
2743 (le32_to_cpu(raw_super->segment_count_nat) / 2)
2744 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
2745 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
2746 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
2747 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
2748 sbi->cur_victim_sec = NULL_SECNO;
2749 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
2750 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
2751 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
2752 sbi->migration_granularity = sbi->segs_per_sec;
2753
2754 sbi->dir_level = DEF_DIR_LEVEL;
2755 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
2756 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
2757 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
2758 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
2759 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
2760 sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
2761 DEF_UMOUNT_DISCARD_TIMEOUT;
2762 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2763
2764 for (i = 0; i < NR_COUNT_TYPE; i++)
2765 atomic_set(&sbi->nr_pages[i], 0);
2766
2767 for (i = 0; i < META; i++)
2768 atomic_set(&sbi->wb_sync_req[i], 0);
2769
2770 INIT_LIST_HEAD(&sbi->s_list);
2771 mutex_init(&sbi->umount_mutex);
2772 init_rwsem(&sbi->io_order_lock);
2773 spin_lock_init(&sbi->cp_lock);
2774
2775 sbi->dirty_device = 0;
2776 spin_lock_init(&sbi->dev_lock);
2777
2778 init_rwsem(&sbi->sb_lock);
2779 }
2780
2781 static int init_percpu_info(struct f2fs_sb_info *sbi)
2782 {
2783 int err;
2784
2785 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
2786 if (err)
2787 return err;
2788
2789 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
2790 GFP_KERNEL);
2791 if (err)
2792 percpu_counter_destroy(&sbi->alloc_valid_block_count);
2793
2794 return err;
2795 }
2796
2797 #ifdef CONFIG_BLK_DEV_ZONED
2798 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
2799 {
2800 struct block_device *bdev = FDEV(devi).bdev;
2801 sector_t nr_sectors = bdev->bd_part->nr_sects;
2802 sector_t sector = 0;
2803 struct blk_zone *zones;
2804 unsigned int i, nr_zones;
2805 unsigned int n = 0;
2806 int err = -EIO;
2807
2808 if (!f2fs_sb_has_blkzoned(sbi))
2809 return 0;
2810
2811 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
2812 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
2813 return -EINVAL;
2814 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
2815 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
2816 __ilog2_u32(sbi->blocks_per_blkz))
2817 return -EINVAL;
2818 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
2819 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
2820 sbi->log_blocks_per_blkz;
2821 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
2822 FDEV(devi).nr_blkz++;
2823
2824 FDEV(devi).blkz_seq = f2fs_kzalloc(sbi,
2825 BITS_TO_LONGS(FDEV(devi).nr_blkz)
2826 * sizeof(unsigned long),
2827 GFP_KERNEL);
2828 if (!FDEV(devi).blkz_seq)
2829 return -ENOMEM;
2830
2831 #define F2FS_REPORT_NR_ZONES 4096
2832
2833 zones = f2fs_kzalloc(sbi,
2834 array_size(F2FS_REPORT_NR_ZONES,
2835 sizeof(struct blk_zone)),
2836 GFP_KERNEL);
2837 if (!zones)
2838 return -ENOMEM;
2839
2840 /* Get block zones type */
2841 while (zones && sector < nr_sectors) {
2842
2843 nr_zones = F2FS_REPORT_NR_ZONES;
2844 err = blkdev_report_zones(bdev, sector,
2845 zones, &nr_zones,
2846 GFP_KERNEL);
2847 if (err)
2848 break;
2849 if (!nr_zones) {
2850 err = -EIO;
2851 break;
2852 }
2853
2854 for (i = 0; i < nr_zones; i++) {
2855 if (zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL)
2856 set_bit(n, FDEV(devi).blkz_seq);
2857 sector += zones[i].len;
2858 n++;
2859 }
2860 }
2861
2862 kvfree(zones);
2863
2864 return err;
2865 }
2866 #endif
2867
2868 /*
2869 * Read f2fs raw super block.
2870 * Because we have two copies of super block, so read both of them
2871 * to get the first valid one. If any one of them is broken, we pass
2872 * them recovery flag back to the caller.
2873 */
2874 static int read_raw_super_block(struct f2fs_sb_info *sbi,
2875 struct f2fs_super_block **raw_super,
2876 int *valid_super_block, int *recovery)
2877 {
2878 struct super_block *sb = sbi->sb;
2879 int block;
2880 struct buffer_head *bh;
2881 struct f2fs_super_block *super;
2882 int err = 0;
2883
2884 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
2885 if (!super)
2886 return -ENOMEM;
2887
2888 for (block = 0; block < 2; block++) {
2889 bh = sb_bread(sb, block);
2890 if (!bh) {
2891 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
2892 block + 1);
2893 err = -EIO;
2894 continue;
2895 }
2896
2897 /* sanity checking of raw super */
2898 if (sanity_check_raw_super(sbi, bh)) {
2899 f2fs_msg(sb, KERN_ERR,
2900 "Can't find valid F2FS filesystem in %dth superblock",
2901 block + 1);
2902 err = -EINVAL;
2903 brelse(bh);
2904 continue;
2905 }
2906
2907 if (!*raw_super) {
2908 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
2909 sizeof(*super));
2910 *valid_super_block = block;
2911 *raw_super = super;
2912 }
2913 brelse(bh);
2914 }
2915
2916 /* Fail to read any one of the superblocks*/
2917 if (err < 0)
2918 *recovery = 1;
2919
2920 /* No valid superblock */
2921 if (!*raw_super)
2922 kvfree(super);
2923 else
2924 err = 0;
2925
2926 return err;
2927 }
2928
2929 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
2930 {
2931 struct buffer_head *bh;
2932 __u32 crc = 0;
2933 int err;
2934
2935 if ((recover && f2fs_readonly(sbi->sb)) ||
2936 bdev_read_only(sbi->sb->s_bdev)) {
2937 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2938 return -EROFS;
2939 }
2940
2941 /* we should update superblock crc here */
2942 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
2943 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
2944 offsetof(struct f2fs_super_block, crc));
2945 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
2946 }
2947
2948 /* write back-up superblock first */
2949 bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
2950 if (!bh)
2951 return -EIO;
2952 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
2953 brelse(bh);
2954
2955 /* if we are in recovery path, skip writing valid superblock */
2956 if (recover || err)
2957 return err;
2958
2959 /* write current valid superblock */
2960 bh = sb_bread(sbi->sb, sbi->valid_super_block);
2961 if (!bh)
2962 return -EIO;
2963 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
2964 brelse(bh);
2965 return err;
2966 }
2967
2968 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
2969 {
2970 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2971 unsigned int max_devices = MAX_DEVICES;
2972 int i;
2973
2974 /* Initialize single device information */
2975 if (!RDEV(0).path[0]) {
2976 if (!bdev_is_zoned(sbi->sb->s_bdev))
2977 return 0;
2978 max_devices = 1;
2979 }
2980
2981 /*
2982 * Initialize multiple devices information, or single
2983 * zoned block device information.
2984 */
2985 sbi->devs = f2fs_kzalloc(sbi,
2986 array_size(max_devices,
2987 sizeof(struct f2fs_dev_info)),
2988 GFP_KERNEL);
2989 if (!sbi->devs)
2990 return -ENOMEM;
2991
2992 for (i = 0; i < max_devices; i++) {
2993
2994 if (i > 0 && !RDEV(i).path[0])
2995 break;
2996
2997 if (max_devices == 1) {
2998 /* Single zoned block device mount */
2999 FDEV(0).bdev =
3000 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3001 sbi->sb->s_mode, sbi->sb->s_type);
3002 } else {
3003 /* Multi-device mount */
3004 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3005 FDEV(i).total_segments =
3006 le32_to_cpu(RDEV(i).total_segments);
3007 if (i == 0) {
3008 FDEV(i).start_blk = 0;
3009 FDEV(i).end_blk = FDEV(i).start_blk +
3010 (FDEV(i).total_segments <<
3011 sbi->log_blocks_per_seg) - 1 +
3012 le32_to_cpu(raw_super->segment0_blkaddr);
3013 } else {
3014 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3015 FDEV(i).end_blk = FDEV(i).start_blk +
3016 (FDEV(i).total_segments <<
3017 sbi->log_blocks_per_seg) - 1;
3018 }
3019 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3020 sbi->sb->s_mode, sbi->sb->s_type);
3021 }
3022 if (IS_ERR(FDEV(i).bdev))
3023 return PTR_ERR(FDEV(i).bdev);
3024
3025 /* to release errored devices */
3026 sbi->s_ndevs = i + 1;
3027
3028 #ifdef CONFIG_BLK_DEV_ZONED
3029 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3030 !f2fs_sb_has_blkzoned(sbi)) {
3031 f2fs_msg(sbi->sb, KERN_ERR,
3032 "Zoned block device feature not enabled\n");
3033 return -EINVAL;
3034 }
3035 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3036 if (init_blkz_info(sbi, i)) {
3037 f2fs_msg(sbi->sb, KERN_ERR,
3038 "Failed to initialize F2FS blkzone information");
3039 return -EINVAL;
3040 }
3041 if (max_devices == 1)
3042 break;
3043 f2fs_msg(sbi->sb, KERN_INFO,
3044 "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3045 i, FDEV(i).path,
3046 FDEV(i).total_segments,
3047 FDEV(i).start_blk, FDEV(i).end_blk,
3048 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3049 "Host-aware" : "Host-managed");
3050 continue;
3051 }
3052 #endif
3053 f2fs_msg(sbi->sb, KERN_INFO,
3054 "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3055 i, FDEV(i).path,
3056 FDEV(i).total_segments,
3057 FDEV(i).start_blk, FDEV(i).end_blk);
3058 }
3059 f2fs_msg(sbi->sb, KERN_INFO,
3060 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3061 return 0;
3062 }
3063
3064 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3065 {
3066 struct f2fs_sm_info *sm_i = SM_I(sbi);
3067
3068 /* adjust parameters according to the volume size */
3069 if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
3070 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
3071 sm_i->dcc_info->discard_granularity = 1;
3072 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3073 }
3074
3075 sbi->readdir_ra = 1;
3076 }
3077
3078 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3079 {
3080 struct f2fs_sb_info *sbi;
3081 struct f2fs_super_block *raw_super;
3082 struct inode *root;
3083 int err;
3084 bool skip_recovery = false, need_fsck = false;
3085 char *options = NULL;
3086 int recovery, i, valid_super_block;
3087 struct curseg_info *seg_i;
3088 int retry_cnt = 1;
3089
3090 try_onemore:
3091 err = -EINVAL;
3092 raw_super = NULL;
3093 valid_super_block = -1;
3094 recovery = 0;
3095
3096 /* allocate memory for f2fs-specific super block info */
3097 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3098 if (!sbi)
3099 return -ENOMEM;
3100
3101 sbi->sb = sb;
3102
3103 /* Load the checksum driver */
3104 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3105 if (IS_ERR(sbi->s_chksum_driver)) {
3106 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
3107 err = PTR_ERR(sbi->s_chksum_driver);
3108 sbi->s_chksum_driver = NULL;
3109 goto free_sbi;
3110 }
3111
3112 /* set a block size */
3113 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
3114 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
3115 goto free_sbi;
3116 }
3117
3118 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
3119 &recovery);
3120 if (err)
3121 goto free_sbi;
3122
3123 sb->s_fs_info = sbi;
3124 sbi->raw_super = raw_super;
3125
3126 /* precompute checksum seed for metadata */
3127 if (f2fs_sb_has_inode_chksum(sbi))
3128 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3129 sizeof(raw_super->uuid));
3130
3131 /*
3132 * The BLKZONED feature indicates that the drive was formatted with
3133 * zone alignment optimization. This is optional for host-aware
3134 * devices, but mandatory for host-managed zoned block devices.
3135 */
3136 #ifndef CONFIG_BLK_DEV_ZONED
3137 if (f2fs_sb_has_blkzoned(sbi)) {
3138 f2fs_msg(sb, KERN_ERR,
3139 "Zoned block device support is not enabled");
3140 err = -EOPNOTSUPP;
3141 goto free_sb_buf;
3142 }
3143 #endif
3144 default_options(sbi);
3145 /* parse mount options */
3146 options = kstrdup((const char *)data, GFP_KERNEL);
3147 if (data && !options) {
3148 err = -ENOMEM;
3149 goto free_sb_buf;
3150 }
3151
3152 err = parse_options(sb, options);
3153 if (err)
3154 goto free_options;
3155
3156 sbi->max_file_blocks = max_file_blocks();
3157 sb->s_maxbytes = sbi->max_file_blocks <<
3158 le32_to_cpu(raw_super->log_blocksize);
3159 sb->s_max_links = F2FS_LINK_MAX;
3160
3161 #ifdef CONFIG_QUOTA
3162 sb->dq_op = &f2fs_quota_operations;
3163 if (f2fs_sb_has_quota_ino(sbi))
3164 sb->s_qcop = &dquot_quotactl_sysfile_ops;
3165 else
3166 sb->s_qcop = &f2fs_quotactl_ops;
3167 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
3168
3169 if (f2fs_sb_has_quota_ino(sbi)) {
3170 for (i = 0; i < MAXQUOTAS; i++) {
3171 if (f2fs_qf_ino(sbi->sb, i))
3172 sbi->nquota_files++;
3173 }
3174 }
3175 #endif
3176
3177 sb->s_op = &f2fs_sops;
3178 #ifdef CONFIG_FS_ENCRYPTION
3179 sb->s_cop = &f2fs_cryptops;
3180 #endif
3181 sb->s_xattr = f2fs_xattr_handlers;
3182 sb->s_export_op = &f2fs_export_ops;
3183 sb->s_magic = F2FS_SUPER_MAGIC;
3184 sb->s_time_gran = 1;
3185 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3186 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
3187 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
3188 sb->s_iflags |= SB_I_CGROUPWB;
3189
3190 /* init f2fs-specific super block info */
3191 sbi->valid_super_block = valid_super_block;
3192 mutex_init(&sbi->gc_mutex);
3193 mutex_init(&sbi->writepages);
3194 mutex_init(&sbi->cp_mutex);
3195 init_rwsem(&sbi->node_write);
3196 init_rwsem(&sbi->node_change);
3197
3198 /* disallow all the data/node/meta page writes */
3199 set_sbi_flag(sbi, SBI_POR_DOING);
3200 spin_lock_init(&sbi->stat_lock);
3201
3202 /* init iostat info */
3203 spin_lock_init(&sbi->iostat_lock);
3204 sbi->iostat_enable = false;
3205
3206 for (i = 0; i < NR_PAGE_TYPE; i++) {
3207 int n = (i == META) ? 1: NR_TEMP_TYPE;
3208 int j;
3209
3210 sbi->write_io[i] =
3211 f2fs_kmalloc(sbi,
3212 array_size(n,
3213 sizeof(struct f2fs_bio_info)),
3214 GFP_KERNEL);
3215 if (!sbi->write_io[i]) {
3216 err = -ENOMEM;
3217 goto free_bio_info;
3218 }
3219
3220 for (j = HOT; j < n; j++) {
3221 init_rwsem(&sbi->write_io[i][j].io_rwsem);
3222 sbi->write_io[i][j].sbi = sbi;
3223 sbi->write_io[i][j].bio = NULL;
3224 spin_lock_init(&sbi->write_io[i][j].io_lock);
3225 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
3226 }
3227 }
3228
3229 init_rwsem(&sbi->cp_rwsem);
3230 init_waitqueue_head(&sbi->cp_wait);
3231 init_sb_info(sbi);
3232
3233 err = init_percpu_info(sbi);
3234 if (err)
3235 goto free_bio_info;
3236
3237 if (F2FS_IO_SIZE(sbi) > 1) {
3238 sbi->write_io_dummy =
3239 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
3240 if (!sbi->write_io_dummy) {
3241 err = -ENOMEM;
3242 goto free_percpu;
3243 }
3244 }
3245
3246 /* get an inode for meta space */
3247 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3248 if (IS_ERR(sbi->meta_inode)) {
3249 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
3250 err = PTR_ERR(sbi->meta_inode);
3251 goto free_io_dummy;
3252 }
3253
3254 err = f2fs_get_valid_checkpoint(sbi);
3255 if (err) {
3256 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
3257 goto free_meta_inode;
3258 }
3259
3260 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3261 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3262 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
3263 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3264 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
3265 }
3266
3267 /* Initialize device list */
3268 err = f2fs_scan_devices(sbi);
3269 if (err) {
3270 f2fs_msg(sb, KERN_ERR, "Failed to find devices");
3271 goto free_devices;
3272 }
3273
3274 sbi->total_valid_node_count =
3275 le32_to_cpu(sbi->ckpt->valid_node_count);
3276 percpu_counter_set(&sbi->total_valid_inode_count,
3277 le32_to_cpu(sbi->ckpt->valid_inode_count));
3278 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3279 sbi->total_valid_block_count =
3280 le64_to_cpu(sbi->ckpt->valid_block_count);
3281 sbi->last_valid_block_count = sbi->total_valid_block_count;
3282 sbi->reserved_blocks = 0;
3283 sbi->current_reserved_blocks = 0;
3284 limit_reserve_root(sbi);
3285
3286 for (i = 0; i < NR_INODE_TYPE; i++) {
3287 INIT_LIST_HEAD(&sbi->inode_list[i]);
3288 spin_lock_init(&sbi->inode_lock[i]);
3289 }
3290
3291 f2fs_init_extent_cache_info(sbi);
3292
3293 f2fs_init_ino_entry_info(sbi);
3294
3295 f2fs_init_fsync_node_info(sbi);
3296
3297 /* setup f2fs internal modules */
3298 err = f2fs_build_segment_manager(sbi);
3299 if (err) {
3300 f2fs_msg(sb, KERN_ERR,
3301 "Failed to initialize F2FS segment manager");
3302 goto free_sm;
3303 }
3304 err = f2fs_build_node_manager(sbi);
3305 if (err) {
3306 f2fs_msg(sb, KERN_ERR,
3307 "Failed to initialize F2FS node manager");
3308 goto free_nm;
3309 }
3310
3311 /* For write statistics */
3312 if (sb->s_bdev->bd_part)
3313 sbi->sectors_written_start =
3314 (u64)part_stat_read(sb->s_bdev->bd_part,
3315 sectors[STAT_WRITE]);
3316
3317 /* Read accumulated write IO statistics if exists */
3318 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3319 if (__exist_node_summaries(sbi))
3320 sbi->kbytes_written =
3321 le64_to_cpu(seg_i->journal->info.kbytes_written);
3322
3323 f2fs_build_gc_manager(sbi);
3324
3325 err = f2fs_build_stats(sbi);
3326 if (err)
3327 goto free_nm;
3328
3329 /* get an inode for node space */
3330 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3331 if (IS_ERR(sbi->node_inode)) {
3332 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
3333 err = PTR_ERR(sbi->node_inode);
3334 goto free_stats;
3335 }
3336
3337 /* read root inode and dentry */
3338 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3339 if (IS_ERR(root)) {
3340 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
3341 err = PTR_ERR(root);
3342 goto free_node_inode;
3343 }
3344 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3345 !root->i_size || !root->i_nlink) {
3346 iput(root);
3347 err = -EINVAL;
3348 goto free_node_inode;
3349 }
3350
3351 sb->s_root = d_make_root(root); /* allocate root dentry */
3352 if (!sb->s_root) {
3353 err = -ENOMEM;
3354 goto free_node_inode;
3355 }
3356
3357 err = f2fs_register_sysfs(sbi);
3358 if (err)
3359 goto free_root_inode;
3360
3361 #ifdef CONFIG_QUOTA
3362 /* Enable quota usage during mount */
3363 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
3364 err = f2fs_enable_quotas(sb);
3365 if (err)
3366 f2fs_msg(sb, KERN_ERR,
3367 "Cannot turn on quotas: error %d", err);
3368 }
3369 #endif
3370 /* if there are nt orphan nodes free them */
3371 err = f2fs_recover_orphan_inodes(sbi);
3372 if (err)
3373 goto free_meta;
3374
3375 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3376 goto reset_checkpoint;
3377
3378 /* recover fsynced data */
3379 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
3380 /*
3381 * mount should be failed, when device has readonly mode, and
3382 * previous checkpoint was not done by clean system shutdown.
3383 */
3384 if (f2fs_hw_is_readonly(sbi)) {
3385 if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3386 err = -EROFS;
3387 f2fs_msg(sb, KERN_ERR,
3388 "Need to recover fsync data, but "
3389 "write access unavailable");
3390 goto free_meta;
3391 }
3392 f2fs_msg(sbi->sb, KERN_INFO, "write access "
3393 "unavailable, skipping recovery");
3394 goto reset_checkpoint;
3395 }
3396
3397 if (need_fsck)
3398 set_sbi_flag(sbi, SBI_NEED_FSCK);
3399
3400 if (skip_recovery)
3401 goto reset_checkpoint;
3402
3403 err = f2fs_recover_fsync_data(sbi, false);
3404 if (err < 0) {
3405 if (err != -ENOMEM)
3406 skip_recovery = true;
3407 need_fsck = true;
3408 f2fs_msg(sb, KERN_ERR,
3409 "Cannot recover all fsync data errno=%d", err);
3410 goto free_meta;
3411 }
3412 } else {
3413 err = f2fs_recover_fsync_data(sbi, true);
3414
3415 if (!f2fs_readonly(sb) && err > 0) {
3416 err = -EINVAL;
3417 f2fs_msg(sb, KERN_ERR,
3418 "Need to recover fsync data");
3419 goto free_meta;
3420 }
3421 }
3422 reset_checkpoint:
3423 /* f2fs_recover_fsync_data() cleared this already */
3424 clear_sbi_flag(sbi, SBI_POR_DOING);
3425
3426 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3427 err = f2fs_disable_checkpoint(sbi);
3428 if (err)
3429 goto sync_free_meta;
3430 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3431 f2fs_enable_checkpoint(sbi);
3432 }
3433
3434 /*
3435 * If filesystem is not mounted as read-only then
3436 * do start the gc_thread.
3437 */
3438 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
3439 /* After POR, we can run background GC thread.*/
3440 err = f2fs_start_gc_thread(sbi);
3441 if (err)
3442 goto sync_free_meta;
3443 }
3444 kvfree(options);
3445
3446 /* recover broken superblock */
3447 if (recovery) {
3448 err = f2fs_commit_super(sbi, true);
3449 f2fs_msg(sb, KERN_INFO,
3450 "Try to recover %dth superblock, ret: %d",
3451 sbi->valid_super_block ? 1 : 2, err);
3452 }
3453
3454 f2fs_join_shrinker(sbi);
3455
3456 f2fs_tuning_parameters(sbi);
3457
3458 f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
3459 cur_cp_version(F2FS_CKPT(sbi)));
3460 f2fs_update_time(sbi, CP_TIME);
3461 f2fs_update_time(sbi, REQ_TIME);
3462 clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
3463 return 0;
3464
3465 sync_free_meta:
3466 /* safe to flush all the data */
3467 sync_filesystem(sbi->sb);
3468 retry_cnt = 0;
3469
3470 free_meta:
3471 #ifdef CONFIG_QUOTA
3472 f2fs_truncate_quota_inode_pages(sb);
3473 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
3474 f2fs_quota_off_umount(sbi->sb);
3475 #endif
3476 /*
3477 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
3478 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
3479 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3480 * falls into an infinite loop in f2fs_sync_meta_pages().
3481 */
3482 truncate_inode_pages_final(META_MAPPING(sbi));
3483 /* evict some inodes being cached by GC */
3484 evict_inodes(sb);
3485 f2fs_unregister_sysfs(sbi);
3486 free_root_inode:
3487 dput(sb->s_root);
3488 sb->s_root = NULL;
3489 free_node_inode:
3490 f2fs_release_ino_entry(sbi, true);
3491 truncate_inode_pages_final(NODE_MAPPING(sbi));
3492 iput(sbi->node_inode);
3493 sbi->node_inode = NULL;
3494 free_stats:
3495 f2fs_destroy_stats(sbi);
3496 free_nm:
3497 f2fs_destroy_node_manager(sbi);
3498 free_sm:
3499 f2fs_destroy_segment_manager(sbi);
3500 free_devices:
3501 destroy_device_list(sbi);
3502 kvfree(sbi->ckpt);
3503 free_meta_inode:
3504 make_bad_inode(sbi->meta_inode);
3505 iput(sbi->meta_inode);
3506 sbi->meta_inode = NULL;
3507 free_io_dummy:
3508 mempool_destroy(sbi->write_io_dummy);
3509 free_percpu:
3510 destroy_percpu_info(sbi);
3511 free_bio_info:
3512 for (i = 0; i < NR_PAGE_TYPE; i++)
3513 kvfree(sbi->write_io[i]);
3514 free_options:
3515 #ifdef CONFIG_QUOTA
3516 for (i = 0; i < MAXQUOTAS; i++)
3517 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
3518 #endif
3519 kvfree(options);
3520 free_sb_buf:
3521 kvfree(raw_super);
3522 free_sbi:
3523 if (sbi->s_chksum_driver)
3524 crypto_free_shash(sbi->s_chksum_driver);
3525 kvfree(sbi);
3526
3527 /* give only one another chance */
3528 if (retry_cnt > 0 && skip_recovery) {
3529 retry_cnt--;
3530 shrink_dcache_sb(sb);
3531 goto try_onemore;
3532 }
3533 return err;
3534 }
3535
3536 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3537 const char *dev_name, void *data)
3538 {
3539 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3540 }
3541
3542 static void kill_f2fs_super(struct super_block *sb)
3543 {
3544 if (sb->s_root) {
3545 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3546
3547 set_sbi_flag(sbi, SBI_IS_CLOSE);
3548 f2fs_stop_gc_thread(sbi);
3549 f2fs_stop_discard_thread(sbi);
3550
3551 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3552 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3553 struct cp_control cpc = {
3554 .reason = CP_UMOUNT,
3555 };
3556 f2fs_write_checkpoint(sbi, &cpc);
3557 }
3558
3559 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3560 sb->s_flags &= ~SB_RDONLY;
3561 }
3562 kill_block_super(sb);
3563 }
3564
3565 static struct file_system_type f2fs_fs_type = {
3566 .owner = THIS_MODULE,
3567 .name = "f2fs",
3568 .mount = f2fs_mount,
3569 .kill_sb = kill_f2fs_super,
3570 .fs_flags = FS_REQUIRES_DEV,
3571 };
3572 MODULE_ALIAS_FS("f2fs");
3573
3574 static int __init init_inodecache(void)
3575 {
3576 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3577 sizeof(struct f2fs_inode_info), 0,
3578 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
3579 if (!f2fs_inode_cachep)
3580 return -ENOMEM;
3581 return 0;
3582 }
3583
3584 static void destroy_inodecache(void)
3585 {
3586 /*
3587 * Make sure all delayed rcu free inodes are flushed before we
3588 * destroy cache.
3589 */
3590 rcu_barrier();
3591 kmem_cache_destroy(f2fs_inode_cachep);
3592 }
3593
3594 static int __init init_f2fs_fs(void)
3595 {
3596 int err;
3597
3598 if (PAGE_SIZE != F2FS_BLKSIZE) {
3599 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3600 PAGE_SIZE, F2FS_BLKSIZE);
3601 return -EINVAL;
3602 }
3603
3604 f2fs_build_trace_ios();
3605
3606 err = init_inodecache();
3607 if (err)
3608 goto fail;
3609 err = f2fs_create_node_manager_caches();
3610 if (err)
3611 goto free_inodecache;
3612 err = f2fs_create_segment_manager_caches();
3613 if (err)
3614 goto free_node_manager_caches;
3615 err = f2fs_create_checkpoint_caches();
3616 if (err)
3617 goto free_segment_manager_caches;
3618 err = f2fs_create_extent_cache();
3619 if (err)
3620 goto free_checkpoint_caches;
3621 err = f2fs_init_sysfs();
3622 if (err)
3623 goto free_extent_cache;
3624 err = register_shrinker(&f2fs_shrinker_info);
3625 if (err)
3626 goto free_sysfs;
3627 err = register_filesystem(&f2fs_fs_type);
3628 if (err)
3629 goto free_shrinker;
3630 f2fs_create_root_stats();
3631 err = f2fs_init_post_read_processing();
3632 if (err)
3633 goto free_root_stats;
3634 return 0;
3635
3636 free_root_stats:
3637 f2fs_destroy_root_stats();
3638 unregister_filesystem(&f2fs_fs_type);
3639 free_shrinker:
3640 unregister_shrinker(&f2fs_shrinker_info);
3641 free_sysfs:
3642 f2fs_exit_sysfs();
3643 free_extent_cache:
3644 f2fs_destroy_extent_cache();
3645 free_checkpoint_caches:
3646 f2fs_destroy_checkpoint_caches();
3647 free_segment_manager_caches:
3648 f2fs_destroy_segment_manager_caches();
3649 free_node_manager_caches:
3650 f2fs_destroy_node_manager_caches();
3651 free_inodecache:
3652 destroy_inodecache();
3653 fail:
3654 return err;
3655 }
3656
3657 static void __exit exit_f2fs_fs(void)
3658 {
3659 f2fs_destroy_post_read_processing();
3660 f2fs_destroy_root_stats();
3661 unregister_filesystem(&f2fs_fs_type);
3662 unregister_shrinker(&f2fs_shrinker_info);
3663 f2fs_exit_sysfs();
3664 f2fs_destroy_extent_cache();
3665 f2fs_destroy_checkpoint_caches();
3666 f2fs_destroy_segment_manager_caches();
3667 f2fs_destroy_node_manager_caches();
3668 destroy_inodecache();
3669 f2fs_destroy_trace_ios();
3670 }
3671
3672 module_init(init_f2fs_fs)
3673 module_exit(exit_f2fs_fs)
3674
3675 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
3676 MODULE_DESCRIPTION("Flash Friendly File System");
3677 MODULE_LICENSE("GPL");
3678
Mirror of linux-2.6-arm at arm.linux.org.uk