1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/super.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/module.h>
9 #include <linux/init.h>
10 #include <linux/fs.h>
11 #include <linux/statfs.h>
12 #include <linux/buffer_head.h>
13 #include <linux/backing-dev.h>
14 #include <linux/kthread.h>
15 #include <linux/parser.h>
16 #include <linux/mount.h>
17 #include <linux/seq_file.h>
18 #include <linux/proc_fs.h>
19 #include <linux/random.h>
20 #include <linux/exportfs.h>
21 #include <linux/blkdev.h>
22 #include <linux/quotaops.h>
23 #include <linux/f2fs_fs.h>
24 #include <linux/sysfs.h>
25 #include <linux/quota.h>
26 #include <linux/unicode.h>
27 #include <linux/part_stat.h>
28 #include <linux/zstd.h>
29 #include <linux/lz4.h>
30
31 #include "f2fs.h"
32 #include "node.h"
33 #include "segment.h"
34 #include "xattr.h"
35 #include "gc.h"
36 #include "iostat.h"
37
38 #define CREATE_TRACE_POINTS
39 #include <trace/events/f2fs.h>
40
41 static struct kmem_cache *f2fs_inode_cachep;
42
43 #ifdef CONFIG_F2FS_FAULT_INJECTION
44
45 const char *f2fs_fault_name[FAULT_MAX] = {
46 [FAULT_KMALLOC] = "kmalloc",
47 [FAULT_KVMALLOC] = "kvmalloc",
48 [FAULT_PAGE_ALLOC] = "page alloc",
49 [FAULT_PAGE_GET] = "page get",
50 [FAULT_ALLOC_NID] = "alloc nid",
51 [FAULT_ORPHAN] = "orphan",
52 [FAULT_BLOCK] = "no more block",
53 [FAULT_DIR_DEPTH] = "too big dir depth",
54 [FAULT_EVICT_INODE] = "evict_inode fail",
55 [FAULT_TRUNCATE] = "truncate fail",
56 [FAULT_READ_IO] = "read IO error",
57 [FAULT_CHECKPOINT] = "checkpoint error",
58 [FAULT_DISCARD] = "discard error",
59 [FAULT_WRITE_IO] = "write IO error",
60 [FAULT_SLAB_ALLOC] = "slab alloc",
61 [FAULT_DQUOT_INIT] = "dquot initialize",
62 [FAULT_LOCK_OP] = "lock_op",
63 };
64
f2fs_build_fault_attr(struct f2fs_sb_info * sbi,unsigned int rate,unsigned int type)65 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
66 unsigned int type)
67 {
68 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
69
70 if (rate) {
71 atomic_set(&ffi->inject_ops, 0);
72 ffi->inject_rate = rate;
73 }
74
75 if (type)
76 ffi->inject_type = type;
77
78 if (!rate && !type)
79 memset(ffi, 0, sizeof(struct f2fs_fault_info));
80 }
81 #endif
82
83 /* f2fs-wide shrinker description */
84 static struct shrinker f2fs_shrinker_info = {
85 .scan_objects = f2fs_shrink_scan,
86 .count_objects = f2fs_shrink_count,
87 .seeks = DEFAULT_SEEKS,
88 };
89
90 enum {
91 Opt_gc_background,
92 Opt_disable_roll_forward,
93 Opt_norecovery,
94 Opt_discard,
95 Opt_nodiscard,
96 Opt_noheap,
97 Opt_heap,
98 Opt_user_xattr,
99 Opt_nouser_xattr,
100 Opt_acl,
101 Opt_noacl,
102 Opt_active_logs,
103 Opt_disable_ext_identify,
104 Opt_inline_xattr,
105 Opt_noinline_xattr,
106 Opt_inline_xattr_size,
107 Opt_inline_data,
108 Opt_inline_dentry,
109 Opt_noinline_dentry,
110 Opt_flush_merge,
111 Opt_noflush_merge,
112 Opt_nobarrier,
113 Opt_fastboot,
114 Opt_extent_cache,
115 Opt_noextent_cache,
116 Opt_noinline_data,
117 Opt_data_flush,
118 Opt_reserve_root,
119 Opt_resgid,
120 Opt_resuid,
121 Opt_mode,
122 Opt_io_size_bits,
123 Opt_fault_injection,
124 Opt_fault_type,
125 Opt_lazytime,
126 Opt_nolazytime,
127 Opt_quota,
128 Opt_noquota,
129 Opt_usrquota,
130 Opt_grpquota,
131 Opt_prjquota,
132 Opt_usrjquota,
133 Opt_grpjquota,
134 Opt_prjjquota,
135 Opt_offusrjquota,
136 Opt_offgrpjquota,
137 Opt_offprjjquota,
138 Opt_jqfmt_vfsold,
139 Opt_jqfmt_vfsv0,
140 Opt_jqfmt_vfsv1,
141 Opt_whint,
142 Opt_alloc,
143 Opt_fsync,
144 Opt_test_dummy_encryption,
145 Opt_inlinecrypt,
146 Opt_checkpoint_disable,
147 Opt_checkpoint_disable_cap,
148 Opt_checkpoint_disable_cap_perc,
149 Opt_checkpoint_enable,
150 Opt_checkpoint_merge,
151 Opt_nocheckpoint_merge,
152 Opt_compress_algorithm,
153 Opt_compress_log_size,
154 Opt_compress_extension,
155 Opt_nocompress_extension,
156 Opt_compress_chksum,
157 Opt_compress_mode,
158 Opt_compress_cache,
159 Opt_atgc,
160 Opt_gc_merge,
161 Opt_nogc_merge,
162 Opt_discard_unit,
163 Opt_memory_mode,
164 Opt_err,
165 };
166
167 static match_table_t f2fs_tokens = {
168 {Opt_gc_background, "background_gc=%s"},
169 {Opt_disable_roll_forward, "disable_roll_forward"},
170 {Opt_norecovery, "norecovery"},
171 {Opt_discard, "discard"},
172 {Opt_nodiscard, "nodiscard"},
173 {Opt_noheap, "no_heap"},
174 {Opt_heap, "heap"},
175 {Opt_user_xattr, "user_xattr"},
176 {Opt_nouser_xattr, "nouser_xattr"},
177 {Opt_acl, "acl"},
178 {Opt_noacl, "noacl"},
179 {Opt_active_logs, "active_logs=%u"},
180 {Opt_disable_ext_identify, "disable_ext_identify"},
181 {Opt_inline_xattr, "inline_xattr"},
182 {Opt_noinline_xattr, "noinline_xattr"},
183 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
184 {Opt_inline_data, "inline_data"},
185 {Opt_inline_dentry, "inline_dentry"},
186 {Opt_noinline_dentry, "noinline_dentry"},
187 {Opt_flush_merge, "flush_merge"},
188 {Opt_noflush_merge, "noflush_merge"},
189 {Opt_nobarrier, "nobarrier"},
190 {Opt_fastboot, "fastboot"},
191 {Opt_extent_cache, "extent_cache"},
192 {Opt_noextent_cache, "noextent_cache"},
193 {Opt_noinline_data, "noinline_data"},
194 {Opt_data_flush, "data_flush"},
195 {Opt_reserve_root, "reserve_root=%u"},
196 {Opt_resgid, "resgid=%u"},
197 {Opt_resuid, "resuid=%u"},
198 {Opt_mode, "mode=%s"},
199 {Opt_io_size_bits, "io_bits=%u"},
200 {Opt_fault_injection, "fault_injection=%u"},
201 {Opt_fault_type, "fault_type=%u"},
202 {Opt_lazytime, "lazytime"},
203 {Opt_nolazytime, "nolazytime"},
204 {Opt_quota, "quota"},
205 {Opt_noquota, "noquota"},
206 {Opt_usrquota, "usrquota"},
207 {Opt_grpquota, "grpquota"},
208 {Opt_prjquota, "prjquota"},
209 {Opt_usrjquota, "usrjquota=%s"},
210 {Opt_grpjquota, "grpjquota=%s"},
211 {Opt_prjjquota, "prjjquota=%s"},
212 {Opt_offusrjquota, "usrjquota="},
213 {Opt_offgrpjquota, "grpjquota="},
214 {Opt_offprjjquota, "prjjquota="},
215 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
216 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
217 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
218 {Opt_whint, "whint_mode=%s"},
219 {Opt_alloc, "alloc_mode=%s"},
220 {Opt_fsync, "fsync_mode=%s"},
221 {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
222 {Opt_test_dummy_encryption, "test_dummy_encryption"},
223 {Opt_inlinecrypt, "inlinecrypt"},
224 {Opt_checkpoint_disable, "checkpoint=disable"},
225 {Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
226 {Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
227 {Opt_checkpoint_enable, "checkpoint=enable"},
228 {Opt_checkpoint_merge, "checkpoint_merge"},
229 {Opt_nocheckpoint_merge, "nocheckpoint_merge"},
230 {Opt_compress_algorithm, "compress_algorithm=%s"},
231 {Opt_compress_log_size, "compress_log_size=%u"},
232 {Opt_compress_extension, "compress_extension=%s"},
233 {Opt_nocompress_extension, "nocompress_extension=%s"},
234 {Opt_compress_chksum, "compress_chksum"},
235 {Opt_compress_mode, "compress_mode=%s"},
236 {Opt_compress_cache, "compress_cache"},
237 {Opt_atgc, "atgc"},
238 {Opt_gc_merge, "gc_merge"},
239 {Opt_nogc_merge, "nogc_merge"},
240 {Opt_discard_unit, "discard_unit=%s"},
241 {Opt_memory_mode, "memory=%s"},
242 {Opt_err, NULL},
243 };
244
f2fs_printk(struct f2fs_sb_info * sbi,const char * fmt,...)245 void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
246 {
247 struct va_format vaf;
248 va_list args;
249 int level;
250
251 va_start(args, fmt);
252
253 level = printk_get_level(fmt);
254 vaf.fmt = printk_skip_level(fmt);
255 vaf.va = &args;
256 printk("%c%cF2FS-fs (%s): %pV\n",
257 KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
258
259 va_end(args);
260 }
261
262 #ifdef CONFIG_UNICODE
263 static const struct f2fs_sb_encodings {
264 __u16 magic;
265 char *name;
266 char *version;
267 } f2fs_sb_encoding_map[] = {
268 {F2FS_ENC_UTF8_12_1, "utf8", "12.1.0"},
269 };
270
f2fs_sb_read_encoding(const struct f2fs_super_block * sb,const struct f2fs_sb_encodings ** encoding,__u16 * flags)271 static int f2fs_sb_read_encoding(const struct f2fs_super_block *sb,
272 const struct f2fs_sb_encodings **encoding,
273 __u16 *flags)
274 {
275 __u16 magic = le16_to_cpu(sb->s_encoding);
276 int i;
277
278 for (i = 0; i < ARRAY_SIZE(f2fs_sb_encoding_map); i++)
279 if (magic == f2fs_sb_encoding_map[i].magic)
280 break;
281
282 if (i >= ARRAY_SIZE(f2fs_sb_encoding_map))
283 return -EINVAL;
284
285 *encoding = &f2fs_sb_encoding_map[i];
286 *flags = le16_to_cpu(sb->s_encoding_flags);
287
288 return 0;
289 }
290
291 struct kmem_cache *f2fs_cf_name_slab;
f2fs_create_casefold_cache(void)292 static int __init f2fs_create_casefold_cache(void)
293 {
294 f2fs_cf_name_slab = f2fs_kmem_cache_create("f2fs_casefolded_name",
295 F2FS_NAME_LEN);
296 if (!f2fs_cf_name_slab)
297 return -ENOMEM;
298 return 0;
299 }
300
f2fs_destroy_casefold_cache(void)301 static void f2fs_destroy_casefold_cache(void)
302 {
303 kmem_cache_destroy(f2fs_cf_name_slab);
304 }
305 #else
f2fs_create_casefold_cache(void)306 static int __init f2fs_create_casefold_cache(void) { return 0; }
f2fs_destroy_casefold_cache(void)307 static void f2fs_destroy_casefold_cache(void) { }
308 #endif
309
limit_reserve_root(struct f2fs_sb_info * sbi)310 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
311 {
312 block_t limit = min((sbi->user_block_count >> 3),
313 sbi->user_block_count - sbi->reserved_blocks);
314
315 /* limit is 12.5% */
316 if (test_opt(sbi, RESERVE_ROOT) &&
317 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
318 F2FS_OPTION(sbi).root_reserved_blocks = limit;
319 f2fs_info(sbi, "Reduce reserved blocks for root = %u",
320 F2FS_OPTION(sbi).root_reserved_blocks);
321 }
322 if (!test_opt(sbi, RESERVE_ROOT) &&
323 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
324 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
325 !gid_eq(F2FS_OPTION(sbi).s_resgid,
326 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
327 f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
328 from_kuid_munged(&init_user_ns,
329 F2FS_OPTION(sbi).s_resuid),
330 from_kgid_munged(&init_user_ns,
331 F2FS_OPTION(sbi).s_resgid));
332 }
333
adjust_reserved_segment(struct f2fs_sb_info * sbi)334 static inline int adjust_reserved_segment(struct f2fs_sb_info *sbi)
335 {
336 unsigned int sec_blks = sbi->blocks_per_seg * sbi->segs_per_sec;
337 unsigned int avg_vblocks;
338 unsigned int wanted_reserved_segments;
339 block_t avail_user_block_count;
340
341 if (!F2FS_IO_ALIGNED(sbi))
342 return 0;
343
344 /* average valid block count in section in worst case */
345 avg_vblocks = sec_blks / F2FS_IO_SIZE(sbi);
346
347 /*
348 * we need enough free space when migrating one section in worst case
349 */
350 wanted_reserved_segments = (F2FS_IO_SIZE(sbi) / avg_vblocks) *
351 reserved_segments(sbi);
352 wanted_reserved_segments -= reserved_segments(sbi);
353
354 avail_user_block_count = sbi->user_block_count -
355 sbi->current_reserved_blocks -
356 F2FS_OPTION(sbi).root_reserved_blocks;
357
358 if (wanted_reserved_segments * sbi->blocks_per_seg >
359 avail_user_block_count) {
360 f2fs_err(sbi, "IO align feature can't grab additional reserved segment: %u, available segments: %u",
361 wanted_reserved_segments,
362 avail_user_block_count >> sbi->log_blocks_per_seg);
363 return -ENOSPC;
364 }
365
366 SM_I(sbi)->additional_reserved_segments = wanted_reserved_segments;
367
368 f2fs_info(sbi, "IO align feature needs additional reserved segment: %u",
369 wanted_reserved_segments);
370
371 return 0;
372 }
373
adjust_unusable_cap_perc(struct f2fs_sb_info * sbi)374 static inline void adjust_unusable_cap_perc(struct f2fs_sb_info *sbi)
375 {
376 if (!F2FS_OPTION(sbi).unusable_cap_perc)
377 return;
378
379 if (F2FS_OPTION(sbi).unusable_cap_perc == 100)
380 F2FS_OPTION(sbi).unusable_cap = sbi->user_block_count;
381 else
382 F2FS_OPTION(sbi).unusable_cap = (sbi->user_block_count / 100) *
383 F2FS_OPTION(sbi).unusable_cap_perc;
384
385 f2fs_info(sbi, "Adjust unusable cap for checkpoint=disable = %u / %u%%",
386 F2FS_OPTION(sbi).unusable_cap,
387 F2FS_OPTION(sbi).unusable_cap_perc);
388 }
389
init_once(void * foo)390 static void init_once(void *foo)
391 {
392 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
393
394 inode_init_once(&fi->vfs_inode);
395 }
396
397 #ifdef CONFIG_QUOTA
398 static const char * const quotatypes[] = INITQFNAMES;
399 #define QTYPE2NAME(t) (quotatypes[t])
f2fs_set_qf_name(struct super_block * sb,int qtype,substring_t * args)400 static int f2fs_set_qf_name(struct super_block *sb, int qtype,
401 substring_t *args)
402 {
403 struct f2fs_sb_info *sbi = F2FS_SB(sb);
404 char *qname;
405 int ret = -EINVAL;
406
407 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
408 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
409 return -EINVAL;
410 }
411 if (f2fs_sb_has_quota_ino(sbi)) {
412 f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
413 return 0;
414 }
415
416 qname = match_strdup(args);
417 if (!qname) {
418 f2fs_err(sbi, "Not enough memory for storing quotafile name");
419 return -ENOMEM;
420 }
421 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
422 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
423 ret = 0;
424 else
425 f2fs_err(sbi, "%s quota file already specified",
426 QTYPE2NAME(qtype));
427 goto errout;
428 }
429 if (strchr(qname, '/')) {
430 f2fs_err(sbi, "quotafile must be on filesystem root");
431 goto errout;
432 }
433 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
434 set_opt(sbi, QUOTA);
435 return 0;
436 errout:
437 kfree(qname);
438 return ret;
439 }
440
f2fs_clear_qf_name(struct super_block * sb,int qtype)441 static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
442 {
443 struct f2fs_sb_info *sbi = F2FS_SB(sb);
444
445 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
446 f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
447 return -EINVAL;
448 }
449 kfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
450 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
451 return 0;
452 }
453
f2fs_check_quota_options(struct f2fs_sb_info * sbi)454 static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
455 {
456 /*
457 * We do the test below only for project quotas. 'usrquota' and
458 * 'grpquota' mount options are allowed even without quota feature
459 * to support legacy quotas in quota files.
460 */
461 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
462 f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
463 return -1;
464 }
465 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
466 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
467 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
468 if (test_opt(sbi, USRQUOTA) &&
469 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
470 clear_opt(sbi, USRQUOTA);
471
472 if (test_opt(sbi, GRPQUOTA) &&
473 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
474 clear_opt(sbi, GRPQUOTA);
475
476 if (test_opt(sbi, PRJQUOTA) &&
477 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
478 clear_opt(sbi, PRJQUOTA);
479
480 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
481 test_opt(sbi, PRJQUOTA)) {
482 f2fs_err(sbi, "old and new quota format mixing");
483 return -1;
484 }
485
486 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
487 f2fs_err(sbi, "journaled quota format not specified");
488 return -1;
489 }
490 }
491
492 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
493 f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
494 F2FS_OPTION(sbi).s_jquota_fmt = 0;
495 }
496 return 0;
497 }
498 #endif
499
f2fs_set_test_dummy_encryption(struct super_block * sb,const char * opt,const substring_t * arg,bool is_remount)500 static int f2fs_set_test_dummy_encryption(struct super_block *sb,
501 const char *opt,
502 const substring_t *arg,
503 bool is_remount)
504 {
505 struct f2fs_sb_info *sbi = F2FS_SB(sb);
506 #ifdef CONFIG_FS_ENCRYPTION
507 int err;
508
509 if (!f2fs_sb_has_encrypt(sbi)) {
510 f2fs_err(sbi, "Encrypt feature is off");
511 return -EINVAL;
512 }
513
514 /*
515 * This mount option is just for testing, and it's not worthwhile to
516 * implement the extra complexity (e.g. RCU protection) that would be
517 * needed to allow it to be set or changed during remount. We do allow
518 * it to be specified during remount, but only if there is no change.
519 */
520 if (is_remount && !F2FS_OPTION(sbi).dummy_enc_policy.policy) {
521 f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
522 return -EINVAL;
523 }
524 err = fscrypt_set_test_dummy_encryption(
525 sb, arg->from, &F2FS_OPTION(sbi).dummy_enc_policy);
526 if (err) {
527 if (err == -EEXIST)
528 f2fs_warn(sbi,
529 "Can't change test_dummy_encryption on remount");
530 else if (err == -EINVAL)
531 f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
532 opt);
533 else
534 f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
535 opt, err);
536 return -EINVAL;
537 }
538 f2fs_warn(sbi, "Test dummy encryption mode enabled");
539 #else
540 f2fs_warn(sbi, "Test dummy encryption mount option ignored");
541 #endif
542 return 0;
543 }
544
545 #ifdef CONFIG_F2FS_FS_COMPRESSION
546 /*
547 * 1. The same extension name cannot not appear in both compress and non-compress extension
548 * at the same time.
549 * 2. If the compress extension specifies all files, the types specified by the non-compress
550 * extension will be treated as special cases and will not be compressed.
551 * 3. Don't allow the non-compress extension specifies all files.
552 */
f2fs_test_compress_extension(struct f2fs_sb_info * sbi)553 static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
554 {
555 unsigned char (*ext)[F2FS_EXTENSION_LEN];
556 unsigned char (*noext)[F2FS_EXTENSION_LEN];
557 int ext_cnt, noext_cnt, index = 0, no_index = 0;
558
559 ext = F2FS_OPTION(sbi).extensions;
560 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
561 noext = F2FS_OPTION(sbi).noextensions;
562 noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
563
564 if (!noext_cnt)
565 return 0;
566
567 for (no_index = 0; no_index < noext_cnt; no_index++) {
568 if (!strcasecmp("*", noext[no_index])) {
569 f2fs_info(sbi, "Don't allow the nocompress extension specifies all files");
570 return -EINVAL;
571 }
572 for (index = 0; index < ext_cnt; index++) {
573 if (!strcasecmp(ext[index], noext[no_index])) {
574 f2fs_info(sbi, "Don't allow the same extension %s appear in both compress and nocompress extension",
575 ext[index]);
576 return -EINVAL;
577 }
578 }
579 }
580 return 0;
581 }
582
583 #ifdef CONFIG_F2FS_FS_LZ4
f2fs_set_lz4hc_level(struct f2fs_sb_info * sbi,const char * str)584 static int f2fs_set_lz4hc_level(struct f2fs_sb_info *sbi, const char *str)
585 {
586 #ifdef CONFIG_F2FS_FS_LZ4HC
587 unsigned int level;
588 #endif
589
590 if (strlen(str) == 3) {
591 F2FS_OPTION(sbi).compress_level = 0;
592 return 0;
593 }
594
595 #ifdef CONFIG_F2FS_FS_LZ4HC
596 str += 3;
597
598 if (str[0] != ':') {
599 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
600 return -EINVAL;
601 }
602 if (kstrtouint(str + 1, 10, &level))
603 return -EINVAL;
604
605 if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) {
606 f2fs_info(sbi, "invalid lz4hc compress level: %d", level);
607 return -EINVAL;
608 }
609
610 F2FS_OPTION(sbi).compress_level = level;
611 return 0;
612 #else
613 f2fs_info(sbi, "kernel doesn't support lz4hc compression");
614 return -EINVAL;
615 #endif
616 }
617 #endif
618
619 #ifdef CONFIG_F2FS_FS_ZSTD
f2fs_set_zstd_level(struct f2fs_sb_info * sbi,const char * str)620 static int f2fs_set_zstd_level(struct f2fs_sb_info *sbi, const char *str)
621 {
622 unsigned int level;
623 int len = 4;
624
625 if (strlen(str) == len) {
626 F2FS_OPTION(sbi).compress_level = 0;
627 return 0;
628 }
629
630 str += len;
631
632 if (str[0] != ':') {
633 f2fs_info(sbi, "wrong format, e.g. <alg_name>:<compr_level>");
634 return -EINVAL;
635 }
636 if (kstrtouint(str + 1, 10, &level))
637 return -EINVAL;
638
639 if (!level || level > ZSTD_maxCLevel()) {
640 f2fs_info(sbi, "invalid zstd compress level: %d", level);
641 return -EINVAL;
642 }
643
644 F2FS_OPTION(sbi).compress_level = level;
645 return 0;
646 }
647 #endif
648 #endif
649
parse_options(struct super_block * sb,char * options,bool is_remount)650 static int parse_options(struct super_block *sb, char *options, bool is_remount)
651 {
652 struct f2fs_sb_info *sbi = F2FS_SB(sb);
653 substring_t args[MAX_OPT_ARGS];
654 #ifdef CONFIG_F2FS_FS_COMPRESSION
655 unsigned char (*ext)[F2FS_EXTENSION_LEN];
656 unsigned char (*noext)[F2FS_EXTENSION_LEN];
657 int ext_cnt, noext_cnt;
658 #endif
659 char *p, *name;
660 int arg = 0;
661 kuid_t uid;
662 kgid_t gid;
663 int ret;
664
665 if (!options)
666 goto default_check;
667
668 while ((p = strsep(&options, ",")) != NULL) {
669 int token;
670
671 if (!*p)
672 continue;
673 /*
674 * Initialize args struct so we know whether arg was
675 * found; some options take optional arguments.
676 */
677 args[0].to = args[0].from = NULL;
678 token = match_token(p, f2fs_tokens, args);
679
680 switch (token) {
681 case Opt_gc_background:
682 name = match_strdup(&args[0]);
683
684 if (!name)
685 return -ENOMEM;
686 if (!strcmp(name, "on")) {
687 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
688 } else if (!strcmp(name, "off")) {
689 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_OFF;
690 } else if (!strcmp(name, "sync")) {
691 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_SYNC;
692 } else {
693 kfree(name);
694 return -EINVAL;
695 }
696 kfree(name);
697 break;
698 case Opt_disable_roll_forward:
699 set_opt(sbi, DISABLE_ROLL_FORWARD);
700 break;
701 case Opt_norecovery:
702 /* this option mounts f2fs with ro */
703 set_opt(sbi, NORECOVERY);
704 if (!f2fs_readonly(sb))
705 return -EINVAL;
706 break;
707 case Opt_discard:
708 if (!f2fs_hw_support_discard(sbi)) {
709 f2fs_warn(sbi, "device does not support discard");
710 break;
711 }
712 set_opt(sbi, DISCARD);
713 break;
714 case Opt_nodiscard:
715 if (f2fs_hw_should_discard(sbi)) {
716 f2fs_warn(sbi, "discard is required for zoned block devices");
717 return -EINVAL;
718 }
719 clear_opt(sbi, DISCARD);
720 break;
721 case Opt_noheap:
722 set_opt(sbi, NOHEAP);
723 break;
724 case Opt_heap:
725 clear_opt(sbi, NOHEAP);
726 break;
727 #ifdef CONFIG_F2FS_FS_XATTR
728 case Opt_user_xattr:
729 set_opt(sbi, XATTR_USER);
730 break;
731 case Opt_nouser_xattr:
732 clear_opt(sbi, XATTR_USER);
733 break;
734 case Opt_inline_xattr:
735 set_opt(sbi, INLINE_XATTR);
736 break;
737 case Opt_noinline_xattr:
738 clear_opt(sbi, INLINE_XATTR);
739 break;
740 case Opt_inline_xattr_size:
741 if (args->from && match_int(args, &arg))
742 return -EINVAL;
743 set_opt(sbi, INLINE_XATTR_SIZE);
744 F2FS_OPTION(sbi).inline_xattr_size = arg;
745 break;
746 #else
747 case Opt_user_xattr:
748 f2fs_info(sbi, "user_xattr options not supported");
749 break;
750 case Opt_nouser_xattr:
751 f2fs_info(sbi, "nouser_xattr options not supported");
752 break;
753 case Opt_inline_xattr:
754 f2fs_info(sbi, "inline_xattr options not supported");
755 break;
756 case Opt_noinline_xattr:
757 f2fs_info(sbi, "noinline_xattr options not supported");
758 break;
759 #endif
760 #ifdef CONFIG_F2FS_FS_POSIX_ACL
761 case Opt_acl:
762 set_opt(sbi, POSIX_ACL);
763 break;
764 case Opt_noacl:
765 clear_opt(sbi, POSIX_ACL);
766 break;
767 #else
768 case Opt_acl:
769 f2fs_info(sbi, "acl options not supported");
770 break;
771 case Opt_noacl:
772 f2fs_info(sbi, "noacl options not supported");
773 break;
774 #endif
775 case Opt_active_logs:
776 if (args->from && match_int(args, &arg))
777 return -EINVAL;
778 if (arg != 2 && arg != 4 &&
779 arg != NR_CURSEG_PERSIST_TYPE)
780 return -EINVAL;
781 F2FS_OPTION(sbi).active_logs = arg;
782 break;
783 case Opt_disable_ext_identify:
784 set_opt(sbi, DISABLE_EXT_IDENTIFY);
785 break;
786 case Opt_inline_data:
787 set_opt(sbi, INLINE_DATA);
788 break;
789 case Opt_inline_dentry:
790 set_opt(sbi, INLINE_DENTRY);
791 break;
792 case Opt_noinline_dentry:
793 clear_opt(sbi, INLINE_DENTRY);
794 break;
795 case Opt_flush_merge:
796 set_opt(sbi, FLUSH_MERGE);
797 break;
798 case Opt_noflush_merge:
799 clear_opt(sbi, FLUSH_MERGE);
800 break;
801 case Opt_nobarrier:
802 set_opt(sbi, NOBARRIER);
803 break;
804 case Opt_fastboot:
805 set_opt(sbi, FASTBOOT);
806 break;
807 case Opt_extent_cache:
808 set_opt(sbi, EXTENT_CACHE);
809 break;
810 case Opt_noextent_cache:
811 clear_opt(sbi, EXTENT_CACHE);
812 break;
813 case Opt_noinline_data:
814 clear_opt(sbi, INLINE_DATA);
815 break;
816 case Opt_data_flush:
817 set_opt(sbi, DATA_FLUSH);
818 break;
819 case Opt_reserve_root:
820 if (args->from && match_int(args, &arg))
821 return -EINVAL;
822 if (test_opt(sbi, RESERVE_ROOT)) {
823 f2fs_info(sbi, "Preserve previous reserve_root=%u",
824 F2FS_OPTION(sbi).root_reserved_blocks);
825 } else {
826 F2FS_OPTION(sbi).root_reserved_blocks = arg;
827 set_opt(sbi, RESERVE_ROOT);
828 }
829 break;
830 case Opt_resuid:
831 if (args->from && match_int(args, &arg))
832 return -EINVAL;
833 uid = make_kuid(current_user_ns(), arg);
834 if (!uid_valid(uid)) {
835 f2fs_err(sbi, "Invalid uid value %d", arg);
836 return -EINVAL;
837 }
838 F2FS_OPTION(sbi).s_resuid = uid;
839 break;
840 case Opt_resgid:
841 if (args->from && match_int(args, &arg))
842 return -EINVAL;
843 gid = make_kgid(current_user_ns(), arg);
844 if (!gid_valid(gid)) {
845 f2fs_err(sbi, "Invalid gid value %d", arg);
846 return -EINVAL;
847 }
848 F2FS_OPTION(sbi).s_resgid = gid;
849 break;
850 case Opt_mode:
851 name = match_strdup(&args[0]);
852
853 if (!name)
854 return -ENOMEM;
855 if (!strcmp(name, "adaptive")) {
856 if (f2fs_sb_has_blkzoned(sbi)) {
857 f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
858 kfree(name);
859 return -EINVAL;
860 }
861 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
862 } else if (!strcmp(name, "lfs")) {
863 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
864 } else if (!strcmp(name, "fragment:segment")) {
865 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_SEG;
866 } else if (!strcmp(name, "fragment:block")) {
867 F2FS_OPTION(sbi).fs_mode = FS_MODE_FRAGMENT_BLK;
868 } else {
869 kfree(name);
870 return -EINVAL;
871 }
872 kfree(name);
873 break;
874 case Opt_io_size_bits:
875 if (args->from && match_int(args, &arg))
876 return -EINVAL;
877 if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
878 f2fs_warn(sbi, "Not support %d, larger than %d",
879 1 << arg, BIO_MAX_PAGES);
880 return -EINVAL;
881 }
882 F2FS_OPTION(sbi).write_io_size_bits = arg;
883 break;
884 #ifdef CONFIG_F2FS_FAULT_INJECTION
885 case Opt_fault_injection:
886 if (args->from && match_int(args, &arg))
887 return -EINVAL;
888 f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
889 set_opt(sbi, FAULT_INJECTION);
890 break;
891
892 case Opt_fault_type:
893 if (args->from && match_int(args, &arg))
894 return -EINVAL;
895 f2fs_build_fault_attr(sbi, 0, arg);
896 set_opt(sbi, FAULT_INJECTION);
897 break;
898 #else
899 case Opt_fault_injection:
900 f2fs_info(sbi, "fault_injection options not supported");
901 break;
902
903 case Opt_fault_type:
904 f2fs_info(sbi, "fault_type options not supported");
905 break;
906 #endif
907 case Opt_lazytime:
908 sb->s_flags |= SB_LAZYTIME;
909 break;
910 case Opt_nolazytime:
911 sb->s_flags &= ~SB_LAZYTIME;
912 break;
913 #ifdef CONFIG_QUOTA
914 case Opt_quota:
915 case Opt_usrquota:
916 set_opt(sbi, USRQUOTA);
917 break;
918 case Opt_grpquota:
919 set_opt(sbi, GRPQUOTA);
920 break;
921 case Opt_prjquota:
922 set_opt(sbi, PRJQUOTA);
923 break;
924 case Opt_usrjquota:
925 ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
926 if (ret)
927 return ret;
928 break;
929 case Opt_grpjquota:
930 ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
931 if (ret)
932 return ret;
933 break;
934 case Opt_prjjquota:
935 ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
936 if (ret)
937 return ret;
938 break;
939 case Opt_offusrjquota:
940 ret = f2fs_clear_qf_name(sb, USRQUOTA);
941 if (ret)
942 return ret;
943 break;
944 case Opt_offgrpjquota:
945 ret = f2fs_clear_qf_name(sb, GRPQUOTA);
946 if (ret)
947 return ret;
948 break;
949 case Opt_offprjjquota:
950 ret = f2fs_clear_qf_name(sb, PRJQUOTA);
951 if (ret)
952 return ret;
953 break;
954 case Opt_jqfmt_vfsold:
955 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
956 break;
957 case Opt_jqfmt_vfsv0:
958 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
959 break;
960 case Opt_jqfmt_vfsv1:
961 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
962 break;
963 case Opt_noquota:
964 clear_opt(sbi, QUOTA);
965 clear_opt(sbi, USRQUOTA);
966 clear_opt(sbi, GRPQUOTA);
967 clear_opt(sbi, PRJQUOTA);
968 break;
969 #else
970 case Opt_quota:
971 case Opt_usrquota:
972 case Opt_grpquota:
973 case Opt_prjquota:
974 case Opt_usrjquota:
975 case Opt_grpjquota:
976 case Opt_prjjquota:
977 case Opt_offusrjquota:
978 case Opt_offgrpjquota:
979 case Opt_offprjjquota:
980 case Opt_jqfmt_vfsold:
981 case Opt_jqfmt_vfsv0:
982 case Opt_jqfmt_vfsv1:
983 case Opt_noquota:
984 f2fs_info(sbi, "quota operations not supported");
985 break;
986 #endif
987 case Opt_whint:
988 name = match_strdup(&args[0]);
989 if (!name)
990 return -ENOMEM;
991 if (!strcmp(name, "user-based")) {
992 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
993 } else if (!strcmp(name, "off")) {
994 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
995 } else if (!strcmp(name, "fs-based")) {
996 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
997 } else {
998 kfree(name);
999 return -EINVAL;
1000 }
1001 kfree(name);
1002 break;
1003 case Opt_alloc:
1004 name = match_strdup(&args[0]);
1005 if (!name)
1006 return -ENOMEM;
1007
1008 if (!strcmp(name, "default")) {
1009 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1010 } else if (!strcmp(name, "reuse")) {
1011 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
1012 } else {
1013 kfree(name);
1014 return -EINVAL;
1015 }
1016 kfree(name);
1017 break;
1018 case Opt_fsync:
1019 name = match_strdup(&args[0]);
1020 if (!name)
1021 return -ENOMEM;
1022 if (!strcmp(name, "posix")) {
1023 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
1024 } else if (!strcmp(name, "strict")) {
1025 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
1026 } else if (!strcmp(name, "nobarrier")) {
1027 F2FS_OPTION(sbi).fsync_mode =
1028 FSYNC_MODE_NOBARRIER;
1029 } else {
1030 kfree(name);
1031 return -EINVAL;
1032 }
1033 kfree(name);
1034 break;
1035 case Opt_test_dummy_encryption:
1036 ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
1037 is_remount);
1038 if (ret)
1039 return ret;
1040 break;
1041 case Opt_inlinecrypt:
1042 #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT
1043 sb->s_flags |= SB_INLINECRYPT;
1044 #else
1045 f2fs_info(sbi, "inline encryption not supported");
1046 #endif
1047 break;
1048 case Opt_checkpoint_disable_cap_perc:
1049 if (args->from && match_int(args, &arg))
1050 return -EINVAL;
1051 if (arg < 0 || arg > 100)
1052 return -EINVAL;
1053 F2FS_OPTION(sbi).unusable_cap_perc = arg;
1054 set_opt(sbi, DISABLE_CHECKPOINT);
1055 break;
1056 case Opt_checkpoint_disable_cap:
1057 if (args->from && match_int(args, &arg))
1058 return -EINVAL;
1059 F2FS_OPTION(sbi).unusable_cap = arg;
1060 set_opt(sbi, DISABLE_CHECKPOINT);
1061 break;
1062 case Opt_checkpoint_disable:
1063 set_opt(sbi, DISABLE_CHECKPOINT);
1064 break;
1065 case Opt_checkpoint_enable:
1066 clear_opt(sbi, DISABLE_CHECKPOINT);
1067 break;
1068 case Opt_checkpoint_merge:
1069 set_opt(sbi, MERGE_CHECKPOINT);
1070 break;
1071 case Opt_nocheckpoint_merge:
1072 clear_opt(sbi, MERGE_CHECKPOINT);
1073 break;
1074 #ifdef CONFIG_F2FS_FS_COMPRESSION
1075 case Opt_compress_algorithm:
1076 if (!f2fs_sb_has_compression(sbi)) {
1077 f2fs_info(sbi, "Image doesn't support compression");
1078 break;
1079 }
1080 name = match_strdup(&args[0]);
1081 if (!name)
1082 return -ENOMEM;
1083 if (!strcmp(name, "lzo")) {
1084 #ifdef CONFIG_F2FS_FS_LZO
1085 F2FS_OPTION(sbi).compress_level = 0;
1086 F2FS_OPTION(sbi).compress_algorithm =
1087 COMPRESS_LZO;
1088 #else
1089 f2fs_info(sbi, "kernel doesn't support lzo compression");
1090 #endif
1091 } else if (!strncmp(name, "lz4", 3)) {
1092 #ifdef CONFIG_F2FS_FS_LZ4
1093 ret = f2fs_set_lz4hc_level(sbi, name);
1094 if (ret) {
1095 kfree(name);
1096 return -EINVAL;
1097 }
1098 F2FS_OPTION(sbi).compress_algorithm =
1099 COMPRESS_LZ4;
1100 #else
1101 f2fs_info(sbi, "kernel doesn't support lz4 compression");
1102 #endif
1103 } else if (!strncmp(name, "zstd", 4)) {
1104 #ifdef CONFIG_F2FS_FS_ZSTD
1105 ret = f2fs_set_zstd_level(sbi, name);
1106 if (ret) {
1107 kfree(name);
1108 return -EINVAL;
1109 }
1110 F2FS_OPTION(sbi).compress_algorithm =
1111 COMPRESS_ZSTD;
1112 #else
1113 f2fs_info(sbi, "kernel doesn't support zstd compression");
1114 #endif
1115 } else if (!strcmp(name, "lzo-rle")) {
1116 #ifdef CONFIG_F2FS_FS_LZORLE
1117 F2FS_OPTION(sbi).compress_level = 0;
1118 F2FS_OPTION(sbi).compress_algorithm =
1119 COMPRESS_LZORLE;
1120 #else
1121 f2fs_info(sbi, "kernel doesn't support lzorle compression");
1122 #endif
1123 } else {
1124 kfree(name);
1125 return -EINVAL;
1126 }
1127 kfree(name);
1128 break;
1129 case Opt_compress_log_size:
1130 if (!f2fs_sb_has_compression(sbi)) {
1131 f2fs_info(sbi, "Image doesn't support compression");
1132 break;
1133 }
1134 if (args->from && match_int(args, &arg))
1135 return -EINVAL;
1136 if (arg < MIN_COMPRESS_LOG_SIZE ||
1137 arg > MAX_COMPRESS_LOG_SIZE) {
1138 f2fs_err(sbi,
1139 "Compress cluster log size is out of range");
1140 return -EINVAL;
1141 }
1142 F2FS_OPTION(sbi).compress_log_size = arg;
1143 break;
1144 case Opt_compress_extension:
1145 if (!f2fs_sb_has_compression(sbi)) {
1146 f2fs_info(sbi, "Image doesn't support compression");
1147 break;
1148 }
1149 name = match_strdup(&args[0]);
1150 if (!name)
1151 return -ENOMEM;
1152
1153 ext = F2FS_OPTION(sbi).extensions;
1154 ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
1155
1156 if (strlen(name) >= F2FS_EXTENSION_LEN ||
1157 ext_cnt >= COMPRESS_EXT_NUM) {
1158 f2fs_err(sbi,
1159 "invalid extension length/number");
1160 kfree(name);
1161 return -EINVAL;
1162 }
1163
1164 strcpy(ext[ext_cnt], name);
1165 F2FS_OPTION(sbi).compress_ext_cnt++;
1166 kfree(name);
1167 break;
1168 case Opt_nocompress_extension:
1169 if (!f2fs_sb_has_compression(sbi)) {
1170 f2fs_info(sbi, "Image doesn't support compression");
1171 break;
1172 }
1173 name = match_strdup(&args[0]);
1174 if (!name)
1175 return -ENOMEM;
1176
1177 noext = F2FS_OPTION(sbi).noextensions;
1178 noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
1179
1180 if (strlen(name) >= F2FS_EXTENSION_LEN ||
1181 noext_cnt >= COMPRESS_EXT_NUM) {
1182 f2fs_err(sbi,
1183 "invalid extension length/number");
1184 kfree(name);
1185 return -EINVAL;
1186 }
1187
1188 strcpy(noext[noext_cnt], name);
1189 F2FS_OPTION(sbi).nocompress_ext_cnt++;
1190 kfree(name);
1191 break;
1192 case Opt_compress_chksum:
1193 F2FS_OPTION(sbi).compress_chksum = true;
1194 break;
1195 case Opt_compress_mode:
1196 name = match_strdup(&args[0]);
1197 if (!name)
1198 return -ENOMEM;
1199 if (!strcmp(name, "fs")) {
1200 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
1201 } else if (!strcmp(name, "user")) {
1202 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER;
1203 } else {
1204 kfree(name);
1205 return -EINVAL;
1206 }
1207 kfree(name);
1208 break;
1209 case Opt_compress_cache:
1210 set_opt(sbi, COMPRESS_CACHE);
1211 break;
1212 #else
1213 case Opt_compress_algorithm:
1214 case Opt_compress_log_size:
1215 case Opt_compress_extension:
1216 case Opt_nocompress_extension:
1217 case Opt_compress_chksum:
1218 case Opt_compress_mode:
1219 case Opt_compress_cache:
1220 f2fs_info(sbi, "compression options not supported");
1221 break;
1222 #endif
1223 case Opt_atgc:
1224 set_opt(sbi, ATGC);
1225 break;
1226 case Opt_gc_merge:
1227 set_opt(sbi, GC_MERGE);
1228 break;
1229 case Opt_nogc_merge:
1230 clear_opt(sbi, GC_MERGE);
1231 break;
1232 case Opt_discard_unit:
1233 name = match_strdup(&args[0]);
1234 if (!name)
1235 return -ENOMEM;
1236 if (!strcmp(name, "block")) {
1237 F2FS_OPTION(sbi).discard_unit =
1238 DISCARD_UNIT_BLOCK;
1239 } else if (!strcmp(name, "segment")) {
1240 F2FS_OPTION(sbi).discard_unit =
1241 DISCARD_UNIT_SEGMENT;
1242 } else if (!strcmp(name, "section")) {
1243 F2FS_OPTION(sbi).discard_unit =
1244 DISCARD_UNIT_SECTION;
1245 } else {
1246 kfree(name);
1247 return -EINVAL;
1248 }
1249 kfree(name);
1250 break;
1251 case Opt_memory_mode:
1252 name = match_strdup(&args[0]);
1253 if (!name)
1254 return -ENOMEM;
1255 if (!strcmp(name, "normal")) {
1256 F2FS_OPTION(sbi).memory_mode =
1257 MEMORY_MODE_NORMAL;
1258 } else if (!strcmp(name, "low")) {
1259 F2FS_OPTION(sbi).memory_mode =
1260 MEMORY_MODE_LOW;
1261 } else {
1262 kfree(name);
1263 return -EINVAL;
1264 }
1265 kfree(name);
1266 break;
1267 default:
1268 f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
1269 p);
1270 return -EINVAL;
1271 }
1272 }
1273 default_check:
1274 #ifdef CONFIG_QUOTA
1275 if (f2fs_check_quota_options(sbi))
1276 return -EINVAL;
1277 #else
1278 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
1279 f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1280 return -EINVAL;
1281 }
1282 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
1283 f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
1284 return -EINVAL;
1285 }
1286 #endif
1287 #ifndef CONFIG_UNICODE
1288 if (f2fs_sb_has_casefold(sbi)) {
1289 f2fs_err(sbi,
1290 "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
1291 return -EINVAL;
1292 }
1293 #endif
1294 /*
1295 * The BLKZONED feature indicates that the drive was formatted with
1296 * zone alignment optimization. This is optional for host-aware
1297 * devices, but mandatory for host-managed zoned block devices.
1298 */
1299 #ifndef CONFIG_BLK_DEV_ZONED
1300 if (f2fs_sb_has_blkzoned(sbi)) {
1301 f2fs_err(sbi, "Zoned block device support is not enabled");
1302 return -EINVAL;
1303 }
1304 #endif
1305 if (f2fs_sb_has_blkzoned(sbi)) {
1306 if (F2FS_OPTION(sbi).discard_unit !=
1307 DISCARD_UNIT_SECTION) {
1308 f2fs_info(sbi, "Zoned block device doesn't need small discard, set discard_unit=section by default");
1309 F2FS_OPTION(sbi).discard_unit =
1310 DISCARD_UNIT_SECTION;
1311 }
1312 }
1313
1314 #ifdef CONFIG_F2FS_FS_COMPRESSION
1315 if (f2fs_test_compress_extension(sbi)) {
1316 f2fs_err(sbi, "invalid compress or nocompress extension");
1317 return -EINVAL;
1318 }
1319 #endif
1320
1321 if (F2FS_IO_SIZE_BITS(sbi) && !f2fs_lfs_mode(sbi)) {
1322 f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
1323 F2FS_IO_SIZE_KB(sbi));
1324 return -EINVAL;
1325 }
1326
1327 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
1328 int min_size, max_size;
1329
1330 if (!f2fs_sb_has_extra_attr(sbi) ||
1331 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
1332 f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
1333 return -EINVAL;
1334 }
1335 if (!test_opt(sbi, INLINE_XATTR)) {
1336 f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
1337 return -EINVAL;
1338 }
1339
1340 min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
1341 max_size = MAX_INLINE_XATTR_SIZE;
1342
1343 if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
1344 F2FS_OPTION(sbi).inline_xattr_size > max_size) {
1345 f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
1346 min_size, max_size);
1347 return -EINVAL;
1348 }
1349 }
1350
1351 if (test_opt(sbi, DISABLE_CHECKPOINT) && f2fs_lfs_mode(sbi)) {
1352 f2fs_err(sbi, "LFS not compatible with checkpoint=disable");
1353 return -EINVAL;
1354 }
1355
1356 /* Not pass down write hints if the number of active logs is lesser
1357 * than NR_CURSEG_PERSIST_TYPE.
1358 */
1359 if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_PERSIST_TYPE)
1360 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1361
1362 if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
1363 f2fs_err(sbi, "Allow to mount readonly mode only");
1364 return -EROFS;
1365 }
1366 return 0;
1367 }
1368
f2fs_alloc_inode(struct super_block * sb)1369 static struct inode *f2fs_alloc_inode(struct super_block *sb)
1370 {
1371 struct f2fs_inode_info *fi;
1372
1373 fi = f2fs_kmem_cache_alloc(f2fs_inode_cachep,
1374 GFP_F2FS_ZERO, false, F2FS_SB(sb));
1375 if (!fi)
1376 return NULL;
1377
1378 init_once((void *) fi);
1379
1380 /* Initialize f2fs-specific inode info */
1381 atomic_set(&fi->dirty_pages, 0);
1382 atomic_set(&fi->i_compr_blocks, 0);
1383 init_f2fs_rwsem(&fi->i_sem);
1384 spin_lock_init(&fi->i_size_lock);
1385 INIT_LIST_HEAD(&fi->dirty_list);
1386 INIT_LIST_HEAD(&fi->gdirty_list);
1387 INIT_LIST_HEAD(&fi->inmem_ilist);
1388 INIT_LIST_HEAD(&fi->inmem_pages);
1389 mutex_init(&fi->inmem_lock);
1390 init_f2fs_rwsem(&fi->i_gc_rwsem[READ]);
1391 init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]);
1392 init_f2fs_rwsem(&fi->i_mmap_sem);
1393 init_f2fs_rwsem(&fi->i_xattr_sem);
1394
1395 /* Will be used by directory only */
1396 fi->i_dir_level = F2FS_SB(sb)->dir_level;
1397
1398 return &fi->vfs_inode;
1399 }
1400
f2fs_drop_inode(struct inode * inode)1401 static int f2fs_drop_inode(struct inode *inode)
1402 {
1403 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1404 int ret;
1405
1406 /*
1407 * during filesystem shutdown, if checkpoint is disabled,
1408 * drop useless meta/node dirty pages.
1409 */
1410 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1411 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1412 inode->i_ino == F2FS_META_INO(sbi)) {
1413 trace_f2fs_drop_inode(inode, 1);
1414 return 1;
1415 }
1416 }
1417
1418 /*
1419 * This is to avoid a deadlock condition like below.
1420 * writeback_single_inode(inode)
1421 * - f2fs_write_data_page
1422 * - f2fs_gc -> iput -> evict
1423 * - inode_wait_for_writeback(inode)
1424 */
1425 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
1426 if (!inode->i_nlink && !is_bad_inode(inode)) {
1427 /* to avoid evict_inode call simultaneously */
1428 atomic_inc(&inode->i_count);
1429 spin_unlock(&inode->i_lock);
1430
1431 /* some remained atomic pages should discarded */
1432 if (f2fs_is_atomic_file(inode))
1433 f2fs_drop_inmem_pages(inode);
1434
1435 /* should remain fi->extent_tree for writepage */
1436 f2fs_destroy_extent_node(inode);
1437
1438 sb_start_intwrite(inode->i_sb);
1439 f2fs_i_size_write(inode, 0);
1440
1441 f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
1442 inode, NULL, 0, DATA);
1443 truncate_inode_pages_final(inode->i_mapping);
1444
1445 if (F2FS_HAS_BLOCKS(inode))
1446 f2fs_truncate(inode);
1447
1448 sb_end_intwrite(inode->i_sb);
1449
1450 spin_lock(&inode->i_lock);
1451 atomic_dec(&inode->i_count);
1452 }
1453 trace_f2fs_drop_inode(inode, 0);
1454 return 0;
1455 }
1456 ret = generic_drop_inode(inode);
1457 if (!ret)
1458 ret = fscrypt_drop_inode(inode);
1459 trace_f2fs_drop_inode(inode, ret);
1460 return ret;
1461 }
1462
f2fs_inode_dirtied(struct inode * inode,bool sync)1463 int f2fs_inode_dirtied(struct inode *inode, bool sync)
1464 {
1465 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1466 int ret = 0;
1467
1468 spin_lock(&sbi->inode_lock[DIRTY_META]);
1469 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1470 ret = 1;
1471 } else {
1472 set_inode_flag(inode, FI_DIRTY_INODE);
1473 stat_inc_dirty_inode(sbi, DIRTY_META);
1474 }
1475 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
1476 list_add_tail(&F2FS_I(inode)->gdirty_list,
1477 &sbi->inode_list[DIRTY_META]);
1478 inc_page_count(sbi, F2FS_DIRTY_IMETA);
1479 }
1480 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1481 return ret;
1482 }
1483
f2fs_inode_synced(struct inode * inode)1484 void f2fs_inode_synced(struct inode *inode)
1485 {
1486 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1487
1488 spin_lock(&sbi->inode_lock[DIRTY_META]);
1489 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
1490 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1491 return;
1492 }
1493 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
1494 list_del_init(&F2FS_I(inode)->gdirty_list);
1495 dec_page_count(sbi, F2FS_DIRTY_IMETA);
1496 }
1497 clear_inode_flag(inode, FI_DIRTY_INODE);
1498 clear_inode_flag(inode, FI_AUTO_RECOVER);
1499 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
1500 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1501 }
1502
1503 /*
1504 * f2fs_dirty_inode() is called from __mark_inode_dirty()
1505 *
1506 * We should call set_dirty_inode to write the dirty inode through write_inode.
1507 */
f2fs_dirty_inode(struct inode * inode,int flags)1508 static void f2fs_dirty_inode(struct inode *inode, int flags)
1509 {
1510 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1511
1512 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
1513 inode->i_ino == F2FS_META_INO(sbi))
1514 return;
1515
1516 if (flags == I_DIRTY_TIME)
1517 return;
1518
1519 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
1520 clear_inode_flag(inode, FI_AUTO_RECOVER);
1521
1522 f2fs_inode_dirtied(inode, false);
1523 }
1524
f2fs_free_inode(struct inode * inode)1525 static void f2fs_free_inode(struct inode *inode)
1526 {
1527 fscrypt_free_inode(inode);
1528 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1529 }
1530
destroy_percpu_info(struct f2fs_sb_info * sbi)1531 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1532 {
1533 percpu_counter_destroy(&sbi->total_valid_inode_count);
1534 percpu_counter_destroy(&sbi->rf_node_block_count);
1535 percpu_counter_destroy(&sbi->alloc_valid_block_count);
1536 }
1537
destroy_device_list(struct f2fs_sb_info * sbi)1538 static void destroy_device_list(struct f2fs_sb_info *sbi)
1539 {
1540 int i;
1541
1542 for (i = 0; i < sbi->s_ndevs; i++) {
1543 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1544 #ifdef CONFIG_BLK_DEV_ZONED
1545 kvfree(FDEV(i).blkz_seq);
1546 #endif
1547 }
1548 kvfree(sbi->devs);
1549 }
1550
f2fs_put_super(struct super_block * sb)1551 static void f2fs_put_super(struct super_block *sb)
1552 {
1553 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1554 int i;
1555 bool dropped;
1556
1557 /* unregister procfs/sysfs entries in advance to avoid race case */
1558 f2fs_unregister_sysfs(sbi);
1559
1560 f2fs_quota_off_umount(sb);
1561
1562 /* prevent remaining shrinker jobs */
1563 mutex_lock(&sbi->umount_mutex);
1564
1565 /*
1566 * flush all issued checkpoints and stop checkpoint issue thread.
1567 * after then, all checkpoints should be done by each process context.
1568 */
1569 f2fs_stop_ckpt_thread(sbi);
1570
1571 /*
1572 * We don't need to do checkpoint when superblock is clean.
1573 * But, the previous checkpoint was not done by umount, it needs to do
1574 * clean checkpoint again.
1575 */
1576 if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1577 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
1578 struct cp_control cpc = {
1579 .reason = CP_UMOUNT,
1580 };
1581 f2fs_write_checkpoint(sbi, &cpc);
1582 }
1583
1584 /* be sure to wait for any on-going discard commands */
1585 dropped = f2fs_issue_discard_timeout(sbi);
1586
1587 if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1588 !sbi->discard_blks && !dropped) {
1589 struct cp_control cpc = {
1590 .reason = CP_UMOUNT | CP_TRIMMED,
1591 };
1592 f2fs_write_checkpoint(sbi, &cpc);
1593 }
1594
1595 /*
1596 * normally superblock is clean, so we need to release this.
1597 * In addition, EIO will skip do checkpoint, we need this as well.
1598 */
1599 f2fs_release_ino_entry(sbi, true);
1600
1601 f2fs_leave_shrinker(sbi);
1602 mutex_unlock(&sbi->umount_mutex);
1603
1604 /* our cp_error case, we can wait for any writeback page */
1605 f2fs_flush_merged_writes(sbi);
1606
1607 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1608
1609 f2fs_bug_on(sbi, sbi->fsync_node_num);
1610
1611 f2fs_destroy_compress_inode(sbi);
1612
1613 iput(sbi->node_inode);
1614 sbi->node_inode = NULL;
1615
1616 iput(sbi->meta_inode);
1617 sbi->meta_inode = NULL;
1618
1619 /*
1620 * iput() can update stat information, if f2fs_write_checkpoint()
1621 * above failed with error.
1622 */
1623 f2fs_destroy_stats(sbi);
1624
1625 /* destroy f2fs internal modules */
1626 f2fs_destroy_node_manager(sbi);
1627 f2fs_destroy_segment_manager(sbi);
1628
1629 f2fs_destroy_post_read_wq(sbi);
1630
1631 kvfree(sbi->ckpt);
1632
1633 sb->s_fs_info = NULL;
1634 if (sbi->s_chksum_driver)
1635 crypto_free_shash(sbi->s_chksum_driver);
1636 kfree(sbi->raw_super);
1637
1638 destroy_device_list(sbi);
1639 f2fs_destroy_page_array_cache(sbi);
1640 f2fs_destroy_xattr_caches(sbi);
1641 mempool_destroy(sbi->write_io_dummy);
1642 #ifdef CONFIG_QUOTA
1643 for (i = 0; i < MAXQUOTAS; i++)
1644 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
1645 #endif
1646 fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
1647 destroy_percpu_info(sbi);
1648 f2fs_destroy_iostat(sbi);
1649 for (i = 0; i < NR_PAGE_TYPE; i++)
1650 kvfree(sbi->write_io[i]);
1651 #ifdef CONFIG_UNICODE
1652 utf8_unload(sb->s_encoding);
1653 #endif
1654 kfree(sbi);
1655 }
1656
f2fs_sync_fs(struct super_block * sb,int sync)1657 int f2fs_sync_fs(struct super_block *sb, int sync)
1658 {
1659 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1660 int err = 0;
1661
1662 if (unlikely(f2fs_cp_error(sbi)))
1663 return 0;
1664 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1665 return 0;
1666
1667 trace_f2fs_sync_fs(sb, sync);
1668
1669 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1670 return -EAGAIN;
1671
1672 if (sync)
1673 err = f2fs_issue_checkpoint(sbi);
1674
1675 return err;
1676 }
1677
f2fs_freeze(struct super_block * sb)1678 static int f2fs_freeze(struct super_block *sb)
1679 {
1680 if (f2fs_readonly(sb))
1681 return 0;
1682
1683 /* IO error happened before */
1684 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1685 return -EIO;
1686
1687 /* must be clean, since sync_filesystem() was already called */
1688 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1689 return -EINVAL;
1690
1691 /* Let's flush checkpoints and stop the thread. */
1692 f2fs_flush_ckpt_thread(F2FS_SB(sb));
1693
1694 /* to avoid deadlock on f2fs_evict_inode->SB_FREEZE_FS */
1695 set_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1696 return 0;
1697 }
1698
f2fs_unfreeze(struct super_block * sb)1699 static int f2fs_unfreeze(struct super_block *sb)
1700 {
1701 clear_sbi_flag(F2FS_SB(sb), SBI_IS_FREEZING);
1702 return 0;
1703 }
1704
1705 #ifdef CONFIG_QUOTA
f2fs_statfs_project(struct super_block * sb,kprojid_t projid,struct kstatfs * buf)1706 static int f2fs_statfs_project(struct super_block *sb,
1707 kprojid_t projid, struct kstatfs *buf)
1708 {
1709 struct kqid qid;
1710 struct dquot *dquot;
1711 u64 limit;
1712 u64 curblock;
1713
1714 qid = make_kqid_projid(projid);
1715 dquot = dqget(sb, qid);
1716 if (IS_ERR(dquot))
1717 return PTR_ERR(dquot);
1718 spin_lock(&dquot->dq_dqb_lock);
1719
1720 limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit,
1721 dquot->dq_dqb.dqb_bhardlimit);
1722 if (limit)
1723 limit >>= sb->s_blocksize_bits;
1724
1725 if (limit && buf->f_blocks > limit) {
1726 curblock = (dquot->dq_dqb.dqb_curspace +
1727 dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits;
1728 buf->f_blocks = limit;
1729 buf->f_bfree = buf->f_bavail =
1730 (buf->f_blocks > curblock) ?
1731 (buf->f_blocks - curblock) : 0;
1732 }
1733
1734 limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit,
1735 dquot->dq_dqb.dqb_ihardlimit);
1736
1737 if (limit && buf->f_files > limit) {
1738 buf->f_files = limit;
1739 buf->f_ffree =
1740 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1741 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1742 }
1743
1744 spin_unlock(&dquot->dq_dqb_lock);
1745 dqput(dquot);
1746 return 0;
1747 }
1748 #endif
1749
f2fs_statfs(struct dentry * dentry,struct kstatfs * buf)1750 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1751 {
1752 struct super_block *sb = dentry->d_sb;
1753 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1754 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1755 block_t total_count, user_block_count, start_count;
1756 u64 avail_node_count;
1757
1758 total_count = le64_to_cpu(sbi->raw_super->block_count);
1759 user_block_count = sbi->user_block_count;
1760 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
1761 buf->f_type = F2FS_SUPER_MAGIC;
1762 buf->f_bsize = sbi->blocksize;
1763
1764 buf->f_blocks = total_count - start_count;
1765 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
1766 sbi->current_reserved_blocks;
1767
1768 spin_lock(&sbi->stat_lock);
1769 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1770 buf->f_bfree = 0;
1771 else
1772 buf->f_bfree -= sbi->unusable_block_count;
1773 spin_unlock(&sbi->stat_lock);
1774
1775 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1776 buf->f_bavail = buf->f_bfree -
1777 F2FS_OPTION(sbi).root_reserved_blocks;
1778 else
1779 buf->f_bavail = 0;
1780
1781 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
1782
1783 if (avail_node_count > user_block_count) {
1784 buf->f_files = user_block_count;
1785 buf->f_ffree = buf->f_bavail;
1786 } else {
1787 buf->f_files = avail_node_count;
1788 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1789 buf->f_bavail);
1790 }
1791
1792 buf->f_namelen = F2FS_NAME_LEN;
1793 buf->f_fsid = u64_to_fsid(id);
1794
1795 #ifdef CONFIG_QUOTA
1796 if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1797 sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1798 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1799 }
1800 #endif
1801 return 0;
1802 }
1803
f2fs_show_quota_options(struct seq_file * seq,struct super_block * sb)1804 static inline void f2fs_show_quota_options(struct seq_file *seq,
1805 struct super_block *sb)
1806 {
1807 #ifdef CONFIG_QUOTA
1808 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1809
1810 if (F2FS_OPTION(sbi).s_jquota_fmt) {
1811 char *fmtname = "";
1812
1813 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
1814 case QFMT_VFS_OLD:
1815 fmtname = "vfsold";
1816 break;
1817 case QFMT_VFS_V0:
1818 fmtname = "vfsv0";
1819 break;
1820 case QFMT_VFS_V1:
1821 fmtname = "vfsv1";
1822 break;
1823 }
1824 seq_printf(seq, ",jqfmt=%s", fmtname);
1825 }
1826
1827 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1828 seq_show_option(seq, "usrjquota",
1829 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
1830
1831 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1832 seq_show_option(seq, "grpjquota",
1833 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
1834
1835 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1836 seq_show_option(seq, "prjjquota",
1837 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
1838 #endif
1839 }
1840
1841 #ifdef CONFIG_F2FS_FS_COMPRESSION
f2fs_show_compress_options(struct seq_file * seq,struct super_block * sb)1842 static inline void f2fs_show_compress_options(struct seq_file *seq,
1843 struct super_block *sb)
1844 {
1845 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1846 char *algtype = "";
1847 int i;
1848
1849 if (!f2fs_sb_has_compression(sbi))
1850 return;
1851
1852 switch (F2FS_OPTION(sbi).compress_algorithm) {
1853 case COMPRESS_LZO:
1854 algtype = "lzo";
1855 break;
1856 case COMPRESS_LZ4:
1857 algtype = "lz4";
1858 break;
1859 case COMPRESS_ZSTD:
1860 algtype = "zstd";
1861 break;
1862 case COMPRESS_LZORLE:
1863 algtype = "lzo-rle";
1864 break;
1865 }
1866 seq_printf(seq, ",compress_algorithm=%s", algtype);
1867
1868 if (F2FS_OPTION(sbi).compress_level)
1869 seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level);
1870
1871 seq_printf(seq, ",compress_log_size=%u",
1872 F2FS_OPTION(sbi).compress_log_size);
1873
1874 for (i = 0; i < F2FS_OPTION(sbi).compress_ext_cnt; i++) {
1875 seq_printf(seq, ",compress_extension=%s",
1876 F2FS_OPTION(sbi).extensions[i]);
1877 }
1878
1879 for (i = 0; i < F2FS_OPTION(sbi).nocompress_ext_cnt; i++) {
1880 seq_printf(seq, ",nocompress_extension=%s",
1881 F2FS_OPTION(sbi).noextensions[i]);
1882 }
1883
1884 if (F2FS_OPTION(sbi).compress_chksum)
1885 seq_puts(seq, ",compress_chksum");
1886
1887 if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS)
1888 seq_printf(seq, ",compress_mode=%s", "fs");
1889 else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER)
1890 seq_printf(seq, ",compress_mode=%s", "user");
1891
1892 if (test_opt(sbi, COMPRESS_CACHE))
1893 seq_puts(seq, ",compress_cache");
1894 }
1895 #endif
1896
f2fs_show_options(struct seq_file * seq,struct dentry * root)1897 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1898 {
1899 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1900
1901 if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_SYNC)
1902 seq_printf(seq, ",background_gc=%s", "sync");
1903 else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_ON)
1904 seq_printf(seq, ",background_gc=%s", "on");
1905 else if (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF)
1906 seq_printf(seq, ",background_gc=%s", "off");
1907
1908 if (test_opt(sbi, GC_MERGE))
1909 seq_puts(seq, ",gc_merge");
1910
1911 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1912 seq_puts(seq, ",disable_roll_forward");
1913 if (test_opt(sbi, NORECOVERY))
1914 seq_puts(seq, ",norecovery");
1915 if (test_opt(sbi, DISCARD))
1916 seq_puts(seq, ",discard");
1917 else
1918 seq_puts(seq, ",nodiscard");
1919 if (test_opt(sbi, NOHEAP))
1920 seq_puts(seq, ",no_heap");
1921 else
1922 seq_puts(seq, ",heap");
1923 #ifdef CONFIG_F2FS_FS_XATTR
1924 if (test_opt(sbi, XATTR_USER))
1925 seq_puts(seq, ",user_xattr");
1926 else
1927 seq_puts(seq, ",nouser_xattr");
1928 if (test_opt(sbi, INLINE_XATTR))
1929 seq_puts(seq, ",inline_xattr");
1930 else
1931 seq_puts(seq, ",noinline_xattr");
1932 if (test_opt(sbi, INLINE_XATTR_SIZE))
1933 seq_printf(seq, ",inline_xattr_size=%u",
1934 F2FS_OPTION(sbi).inline_xattr_size);
1935 #endif
1936 #ifdef CONFIG_F2FS_FS_POSIX_ACL
1937 if (test_opt(sbi, POSIX_ACL))
1938 seq_puts(seq, ",acl");
1939 else
1940 seq_puts(seq, ",noacl");
1941 #endif
1942 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
1943 seq_puts(seq, ",disable_ext_identify");
1944 if (test_opt(sbi, INLINE_DATA))
1945 seq_puts(seq, ",inline_data");
1946 else
1947 seq_puts(seq, ",noinline_data");
1948 if (test_opt(sbi, INLINE_DENTRY))
1949 seq_puts(seq, ",inline_dentry");
1950 else
1951 seq_puts(seq, ",noinline_dentry");
1952 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
1953 seq_puts(seq, ",flush_merge");
1954 if (test_opt(sbi, NOBARRIER))
1955 seq_puts(seq, ",nobarrier");
1956 if (test_opt(sbi, FASTBOOT))
1957 seq_puts(seq, ",fastboot");
1958 if (test_opt(sbi, EXTENT_CACHE))
1959 seq_puts(seq, ",extent_cache");
1960 else
1961 seq_puts(seq, ",noextent_cache");
1962 if (test_opt(sbi, DATA_FLUSH))
1963 seq_puts(seq, ",data_flush");
1964
1965 seq_puts(seq, ",mode=");
1966 if (F2FS_OPTION(sbi).fs_mode == FS_MODE_ADAPTIVE)
1967 seq_puts(seq, "adaptive");
1968 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_LFS)
1969 seq_puts(seq, "lfs");
1970 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_SEG)
1971 seq_puts(seq, "fragment:segment");
1972 else if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
1973 seq_puts(seq, "fragment:block");
1974 seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
1975 if (test_opt(sbi, RESERVE_ROOT))
1976 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
1977 F2FS_OPTION(sbi).root_reserved_blocks,
1978 from_kuid_munged(&init_user_ns,
1979 F2FS_OPTION(sbi).s_resuid),
1980 from_kgid_munged(&init_user_ns,
1981 F2FS_OPTION(sbi).s_resgid));
1982 if (F2FS_IO_SIZE_BITS(sbi))
1983 seq_printf(seq, ",io_bits=%u",
1984 F2FS_OPTION(sbi).write_io_size_bits);
1985 #ifdef CONFIG_F2FS_FAULT_INJECTION
1986 if (test_opt(sbi, FAULT_INJECTION)) {
1987 seq_printf(seq, ",fault_injection=%u",
1988 F2FS_OPTION(sbi).fault_info.inject_rate);
1989 seq_printf(seq, ",fault_type=%u",
1990 F2FS_OPTION(sbi).fault_info.inject_type);
1991 }
1992 #endif
1993 #ifdef CONFIG_QUOTA
1994 if (test_opt(sbi, QUOTA))
1995 seq_puts(seq, ",quota");
1996 if (test_opt(sbi, USRQUOTA))
1997 seq_puts(seq, ",usrquota");
1998 if (test_opt(sbi, GRPQUOTA))
1999 seq_puts(seq, ",grpquota");
2000 if (test_opt(sbi, PRJQUOTA))
2001 seq_puts(seq, ",prjquota");
2002 #endif
2003 f2fs_show_quota_options(seq, sbi->sb);
2004 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
2005 seq_printf(seq, ",whint_mode=%s", "user-based");
2006 else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
2007 seq_printf(seq, ",whint_mode=%s", "fs-based");
2008
2009 fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
2010
2011 if (sbi->sb->s_flags & SB_INLINECRYPT)
2012 seq_puts(seq, ",inlinecrypt");
2013
2014 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
2015 seq_printf(seq, ",alloc_mode=%s", "default");
2016 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
2017 seq_printf(seq, ",alloc_mode=%s", "reuse");
2018
2019 if (test_opt(sbi, DISABLE_CHECKPOINT))
2020 seq_printf(seq, ",checkpoint=disable:%u",
2021 F2FS_OPTION(sbi).unusable_cap);
2022 if (test_opt(sbi, MERGE_CHECKPOINT))
2023 seq_puts(seq, ",checkpoint_merge");
2024 else
2025 seq_puts(seq, ",nocheckpoint_merge");
2026 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
2027 seq_printf(seq, ",fsync_mode=%s", "posix");
2028 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
2029 seq_printf(seq, ",fsync_mode=%s", "strict");
2030 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
2031 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
2032
2033 #ifdef CONFIG_F2FS_FS_COMPRESSION
2034 f2fs_show_compress_options(seq, sbi->sb);
2035 #endif
2036
2037 if (test_opt(sbi, ATGC))
2038 seq_puts(seq, ",atgc");
2039
2040 if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_BLOCK)
2041 seq_printf(seq, ",discard_unit=%s", "block");
2042 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SEGMENT)
2043 seq_printf(seq, ",discard_unit=%s", "segment");
2044 else if (F2FS_OPTION(sbi).discard_unit == DISCARD_UNIT_SECTION)
2045 seq_printf(seq, ",discard_unit=%s", "section");
2046
2047 if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_NORMAL)
2048 seq_printf(seq, ",memory=%s", "normal");
2049 else if (F2FS_OPTION(sbi).memory_mode == MEMORY_MODE_LOW)
2050 seq_printf(seq, ",memory=%s", "low");
2051
2052 return 0;
2053 }
2054
default_options(struct f2fs_sb_info * sbi)2055 static void default_options(struct f2fs_sb_info *sbi)
2056 {
2057 /* init some FS parameters */
2058 if (f2fs_sb_has_readonly(sbi))
2059 F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE;
2060 else
2061 F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
2062
2063 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
2064 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
2065 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
2066 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
2067 F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
2068 F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
2069 F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
2070 F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE;
2071 F2FS_OPTION(sbi).compress_ext_cnt = 0;
2072 F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS;
2073 F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON;
2074 F2FS_OPTION(sbi).memory_mode = MEMORY_MODE_NORMAL;
2075
2076 sbi->sb->s_flags &= ~SB_INLINECRYPT;
2077
2078 set_opt(sbi, INLINE_XATTR);
2079 set_opt(sbi, INLINE_DATA);
2080 set_opt(sbi, INLINE_DENTRY);
2081 set_opt(sbi, EXTENT_CACHE);
2082 set_opt(sbi, NOHEAP);
2083 clear_opt(sbi, DISABLE_CHECKPOINT);
2084 set_opt(sbi, MERGE_CHECKPOINT);
2085 F2FS_OPTION(sbi).unusable_cap = 0;
2086 sbi->sb->s_flags |= SB_LAZYTIME;
2087 set_opt(sbi, FLUSH_MERGE);
2088 if (f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi))
2089 set_opt(sbi, DISCARD);
2090 if (f2fs_sb_has_blkzoned(sbi)) {
2091 F2FS_OPTION(sbi).fs_mode = FS_MODE_LFS;
2092 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_SECTION;
2093 } else {
2094 F2FS_OPTION(sbi).fs_mode = FS_MODE_ADAPTIVE;
2095 F2FS_OPTION(sbi).discard_unit = DISCARD_UNIT_BLOCK;
2096 }
2097
2098 #ifdef CONFIG_F2FS_FS_XATTR
2099 set_opt(sbi, XATTR_USER);
2100 #endif
2101 #ifdef CONFIG_F2FS_FS_POSIX_ACL
2102 set_opt(sbi, POSIX_ACL);
2103 #endif
2104
2105 f2fs_build_fault_attr(sbi, 0, 0);
2106 }
2107
2108 #ifdef CONFIG_QUOTA
2109 static int f2fs_enable_quotas(struct super_block *sb);
2110 #endif
2111
f2fs_disable_checkpoint(struct f2fs_sb_info * sbi)2112 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
2113 {
2114 unsigned int s_flags = sbi->sb->s_flags;
2115 struct cp_control cpc;
2116 unsigned int gc_mode = sbi->gc_mode;
2117 int err = 0;
2118 int ret;
2119 block_t unusable;
2120
2121 if (s_flags & SB_RDONLY) {
2122 f2fs_err(sbi, "checkpoint=disable on readonly fs");
2123 return -EINVAL;
2124 }
2125 sbi->sb->s_flags |= SB_ACTIVE;
2126
2127 /* check if we need more GC first */
2128 unusable = f2fs_get_unusable_blocks(sbi);
2129 if (!f2fs_disable_cp_again(sbi, unusable))
2130 goto skip_gc;
2131
2132 f2fs_update_time(sbi, DISABLE_TIME);
2133
2134 sbi->gc_mode = GC_URGENT_HIGH;
2135
2136 while (!f2fs_time_over(sbi, DISABLE_TIME)) {
2137 f2fs_down_write(&sbi->gc_lock);
2138 err = f2fs_gc(sbi, true, false, false, NULL_SEGNO);
2139 if (err == -ENODATA) {
2140 err = 0;
2141 break;
2142 }
2143 if (err && err != -EAGAIN)
2144 break;
2145 }
2146
2147 ret = sync_filesystem(sbi->sb);
2148 if (ret || err) {
2149 err = ret ? ret : err;
2150 goto restore_flag;
2151 }
2152
2153 unusable = f2fs_get_unusable_blocks(sbi);
2154 if (f2fs_disable_cp_again(sbi, unusable)) {
2155 err = -EAGAIN;
2156 goto restore_flag;
2157 }
2158
2159 skip_gc:
2160 f2fs_down_write(&sbi->gc_lock);
2161 cpc.reason = CP_PAUSE;
2162 set_sbi_flag(sbi, SBI_CP_DISABLED);
2163 err = f2fs_write_checkpoint(sbi, &cpc);
2164 if (err)
2165 goto out_unlock;
2166
2167 spin_lock(&sbi->stat_lock);
2168 sbi->unusable_block_count = unusable;
2169 spin_unlock(&sbi->stat_lock);
2170
2171 out_unlock:
2172 f2fs_up_write(&sbi->gc_lock);
2173 restore_flag:
2174 sbi->gc_mode = gc_mode;
2175 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
2176 return err;
2177 }
2178
f2fs_enable_checkpoint(struct f2fs_sb_info * sbi)2179 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
2180 {
2181 int retry = DEFAULT_RETRY_IO_COUNT;
2182
2183 /* we should flush all the data to keep data consistency */
2184 do {
2185 sync_inodes_sb(sbi->sb);
2186 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2187 } while (get_pages(sbi, F2FS_DIRTY_DATA) && retry--);
2188
2189 if (unlikely(retry < 0))
2190 f2fs_warn(sbi, "checkpoint=enable has some unwritten data.");
2191
2192 f2fs_down_write(&sbi->gc_lock);
2193 f2fs_dirty_to_prefree(sbi);
2194
2195 clear_sbi_flag(sbi, SBI_CP_DISABLED);
2196 set_sbi_flag(sbi, SBI_IS_DIRTY);
2197 f2fs_up_write(&sbi->gc_lock);
2198
2199 f2fs_sync_fs(sbi->sb, 1);
2200
2201 /* Let's ensure there's no pending checkpoint anymore */
2202 f2fs_flush_ckpt_thread(sbi);
2203 }
2204
f2fs_remount(struct super_block * sb,int * flags,char * data)2205 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
2206 {
2207 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2208 struct f2fs_mount_info org_mount_opt;
2209 unsigned long old_sb_flags;
2210 int err;
2211 bool need_restart_gc = false, need_stop_gc = false;
2212 bool need_restart_ckpt = false, need_stop_ckpt = false;
2213 bool need_restart_flush = false, need_stop_flush = false;
2214 bool need_restart_discard = false, need_stop_discard = false;
2215 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2216 bool enable_checkpoint = !test_opt(sbi, DISABLE_CHECKPOINT);
2217 bool no_io_align = !F2FS_IO_ALIGNED(sbi);
2218 bool no_atgc = !test_opt(sbi, ATGC);
2219 bool no_discard = !test_opt(sbi, DISCARD);
2220 bool no_compress_cache = !test_opt(sbi, COMPRESS_CACHE);
2221 bool block_unit_discard = f2fs_block_unit_discard(sbi);
2222 struct discard_cmd_control *dcc;
2223 #ifdef CONFIG_QUOTA
2224 int i, j;
2225 #endif
2226
2227 /*
2228 * Save the old mount options in case we
2229 * need to restore them.
2230 */
2231 org_mount_opt = sbi->mount_opt;
2232 old_sb_flags = sb->s_flags;
2233
2234 #ifdef CONFIG_QUOTA
2235 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
2236 for (i = 0; i < MAXQUOTAS; i++) {
2237 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2238 org_mount_opt.s_qf_names[i] =
2239 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
2240 GFP_KERNEL);
2241 if (!org_mount_opt.s_qf_names[i]) {
2242 for (j = 0; j < i; j++)
2243 kfree(org_mount_opt.s_qf_names[j]);
2244 return -ENOMEM;
2245 }
2246 } else {
2247 org_mount_opt.s_qf_names[i] = NULL;
2248 }
2249 }
2250 #endif
2251
2252 /* recover superblocks we couldn't write due to previous RO mount */
2253 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
2254 err = f2fs_commit_super(sbi, false);
2255 f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
2256 err);
2257 if (!err)
2258 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
2259 }
2260
2261 default_options(sbi);
2262
2263 /* parse mount options */
2264 err = parse_options(sb, data, true);
2265 if (err)
2266 goto restore_opts;
2267
2268 /*
2269 * Previous and new state of filesystem is RO,
2270 * so skip checking GC and FLUSH_MERGE conditions.
2271 */
2272 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
2273 goto skip;
2274
2275 if (f2fs_sb_has_readonly(sbi) && !(*flags & SB_RDONLY)) {
2276 err = -EROFS;
2277 goto restore_opts;
2278 }
2279
2280 #ifdef CONFIG_QUOTA
2281 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
2282 err = dquot_suspend(sb, -1);
2283 if (err < 0)
2284 goto restore_opts;
2285 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
2286 /* dquot_resume needs RW */
2287 sb->s_flags &= ~SB_RDONLY;
2288 if (sb_any_quota_suspended(sb)) {
2289 dquot_resume(sb, -1);
2290 } else if (f2fs_sb_has_quota_ino(sbi)) {
2291 err = f2fs_enable_quotas(sb);
2292 if (err)
2293 goto restore_opts;
2294 }
2295 }
2296 #endif
2297 /* disallow enable atgc dynamically */
2298 if (no_atgc == !!test_opt(sbi, ATGC)) {
2299 err = -EINVAL;
2300 f2fs_warn(sbi, "switch atgc option is not allowed");
2301 goto restore_opts;
2302 }
2303
2304 /* disallow enable/disable extent_cache dynamically */
2305 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
2306 err = -EINVAL;
2307 f2fs_warn(sbi, "switch extent_cache option is not allowed");
2308 goto restore_opts;
2309 }
2310
2311 if (no_io_align == !!F2FS_IO_ALIGNED(sbi)) {
2312 err = -EINVAL;
2313 f2fs_warn(sbi, "switch io_bits option is not allowed");
2314 goto restore_opts;
2315 }
2316
2317 if (no_compress_cache == !!test_opt(sbi, COMPRESS_CACHE)) {
2318 err = -EINVAL;
2319 f2fs_warn(sbi, "switch compress_cache option is not allowed");
2320 goto restore_opts;
2321 }
2322
2323 if (block_unit_discard != f2fs_block_unit_discard(sbi)) {
2324 err = -EINVAL;
2325 f2fs_warn(sbi, "switch discard_unit option is not allowed");
2326 goto restore_opts;
2327 }
2328
2329 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
2330 err = -EINVAL;
2331 f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
2332 goto restore_opts;
2333 }
2334
2335 /*
2336 * We stop the GC thread if FS is mounted as RO
2337 * or if background_gc = off is passed in mount
2338 * option. Also sync the filesystem.
2339 */
2340 if ((*flags & SB_RDONLY) ||
2341 (F2FS_OPTION(sbi).bggc_mode == BGGC_MODE_OFF &&
2342 !test_opt(sbi, GC_MERGE))) {
2343 if (sbi->gc_thread) {
2344 f2fs_stop_gc_thread(sbi);
2345 need_restart_gc = true;
2346 }
2347 } else if (!sbi->gc_thread) {
2348 err = f2fs_start_gc_thread(sbi);
2349 if (err)
2350 goto restore_opts;
2351 need_stop_gc = true;
2352 }
2353
2354 if (*flags & SB_RDONLY ||
2355 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
2356 sync_inodes_sb(sb);
2357
2358 set_sbi_flag(sbi, SBI_IS_DIRTY);
2359 set_sbi_flag(sbi, SBI_IS_CLOSE);
2360 f2fs_sync_fs(sb, 1);
2361 clear_sbi_flag(sbi, SBI_IS_CLOSE);
2362 }
2363
2364 if ((*flags & SB_RDONLY) || test_opt(sbi, DISABLE_CHECKPOINT) ||
2365 !test_opt(sbi, MERGE_CHECKPOINT)) {
2366 f2fs_stop_ckpt_thread(sbi);
2367 need_restart_ckpt = true;
2368 } else {
2369 /* Flush if the prevous checkpoint, if exists. */
2370 f2fs_flush_ckpt_thread(sbi);
2371
2372 err = f2fs_start_ckpt_thread(sbi);
2373 if (err) {
2374 f2fs_err(sbi,
2375 "Failed to start F2FS issue_checkpoint_thread (%d)",
2376 err);
2377 goto restore_gc;
2378 }
2379 need_stop_ckpt = true;
2380 }
2381
2382 /*
2383 * We stop issue flush thread if FS is mounted as RO
2384 * or if flush_merge is not passed in mount option.
2385 */
2386 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2387 clear_opt(sbi, FLUSH_MERGE);
2388 f2fs_destroy_flush_cmd_control(sbi, false);
2389 need_restart_flush = true;
2390 } else {
2391 err = f2fs_create_flush_cmd_control(sbi);
2392 if (err)
2393 goto restore_ckpt;
2394 need_stop_flush = true;
2395 }
2396
2397 if (no_discard == !!test_opt(sbi, DISCARD)) {
2398 if (test_opt(sbi, DISCARD)) {
2399 err = f2fs_start_discard_thread(sbi);
2400 if (err)
2401 goto restore_flush;
2402 need_stop_discard = true;
2403 } else {
2404 dcc = SM_I(sbi)->dcc_info;
2405 f2fs_stop_discard_thread(sbi);
2406 if (atomic_read(&dcc->discard_cmd_cnt))
2407 f2fs_issue_discard_timeout(sbi);
2408 need_restart_discard = true;
2409 }
2410 }
2411
2412 if (enable_checkpoint == !!test_opt(sbi, DISABLE_CHECKPOINT)) {
2413 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
2414 err = f2fs_disable_checkpoint(sbi);
2415 if (err)
2416 goto restore_discard;
2417 } else {
2418 f2fs_enable_checkpoint(sbi);
2419 }
2420 }
2421
2422 skip:
2423 #ifdef CONFIG_QUOTA
2424 /* Release old quota file names */
2425 for (i = 0; i < MAXQUOTAS; i++)
2426 kfree(org_mount_opt.s_qf_names[i]);
2427 #endif
2428 /* Update the POSIXACL Flag */
2429 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
2430 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
2431
2432 limit_reserve_root(sbi);
2433 adjust_unusable_cap_perc(sbi);
2434 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
2435 return 0;
2436 restore_discard:
2437 if (need_restart_discard) {
2438 if (f2fs_start_discard_thread(sbi))
2439 f2fs_warn(sbi, "discard has been stopped");
2440 } else if (need_stop_discard) {
2441 f2fs_stop_discard_thread(sbi);
2442 }
2443 restore_flush:
2444 if (need_restart_flush) {
2445 if (f2fs_create_flush_cmd_control(sbi))
2446 f2fs_warn(sbi, "background flush thread has stopped");
2447 } else if (need_stop_flush) {
2448 clear_opt(sbi, FLUSH_MERGE);
2449 f2fs_destroy_flush_cmd_control(sbi, false);
2450 }
2451 restore_ckpt:
2452 if (need_restart_ckpt) {
2453 if (f2fs_start_ckpt_thread(sbi))
2454 f2fs_warn(sbi, "background ckpt thread has stopped");
2455 } else if (need_stop_ckpt) {
2456 f2fs_stop_ckpt_thread(sbi);
2457 }
2458 restore_gc:
2459 if (need_restart_gc) {
2460 if (f2fs_start_gc_thread(sbi))
2461 f2fs_warn(sbi, "background gc thread has stopped");
2462 } else if (need_stop_gc) {
2463 f2fs_stop_gc_thread(sbi);
2464 }
2465 restore_opts:
2466 #ifdef CONFIG_QUOTA
2467 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
2468 for (i = 0; i < MAXQUOTAS; i++) {
2469 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
2470 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
2471 }
2472 #endif
2473 sbi->mount_opt = org_mount_opt;
2474 sb->s_flags = old_sb_flags;
2475 return err;
2476 }
2477
2478 #ifdef CONFIG_QUOTA
2479 /* Read data from quotafile */
f2fs_quota_read(struct super_block * sb,int type,char * data,size_t len,loff_t off)2480 static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
2481 size_t len, loff_t off)
2482 {
2483 struct inode *inode = sb_dqopt(sb)->files[type];
2484 struct address_space *mapping = inode->i_mapping;
2485 block_t blkidx = F2FS_BYTES_TO_BLK(off);
2486 int offset = off & (sb->s_blocksize - 1);
2487 int tocopy;
2488 size_t toread;
2489 loff_t i_size = i_size_read(inode);
2490 struct page *page;
2491
2492 if (off > i_size)
2493 return 0;
2494
2495 if (off + len > i_size)
2496 len = i_size - off;
2497 toread = len;
2498 while (toread > 0) {
2499 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
2500 repeat:
2501 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
2502 if (IS_ERR(page)) {
2503 if (PTR_ERR(page) == -ENOMEM) {
2504 congestion_wait(BLK_RW_ASYNC,
2505 DEFAULT_IO_TIMEOUT);
2506 goto repeat;
2507 }
2508 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2509 return PTR_ERR(page);
2510 }
2511
2512 lock_page(page);
2513
2514 if (unlikely(page->mapping != mapping)) {
2515 f2fs_put_page(page, 1);
2516 goto repeat;
2517 }
2518 if (unlikely(!PageUptodate(page))) {
2519 f2fs_put_page(page, 1);
2520 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2521 return -EIO;
2522 }
2523
2524 memcpy_from_page(data, page, offset, tocopy);
2525 f2fs_put_page(page, 1);
2526
2527 offset = 0;
2528 toread -= tocopy;
2529 data += tocopy;
2530 blkidx++;
2531 }
2532 return len;
2533 }
2534
2535 /* Write to quotafile */
f2fs_quota_write(struct super_block * sb,int type,const char * data,size_t len,loff_t off)2536 static ssize_t f2fs_quota_write(struct super_block *sb, int type,
2537 const char *data, size_t len, loff_t off)
2538 {
2539 struct inode *inode = sb_dqopt(sb)->files[type];
2540 struct address_space *mapping = inode->i_mapping;
2541 const struct address_space_operations *a_ops = mapping->a_ops;
2542 int offset = off & (sb->s_blocksize - 1);
2543 size_t towrite = len;
2544 struct page *page;
2545 void *fsdata = NULL;
2546 int err = 0;
2547 int tocopy;
2548
2549 while (towrite > 0) {
2550 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
2551 towrite);
2552 retry:
2553 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
2554 &page, &fsdata);
2555 if (unlikely(err)) {
2556 if (err == -ENOMEM) {
2557 f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT);
2558 goto retry;
2559 }
2560 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2561 break;
2562 }
2563
2564 memcpy_to_page(page, offset, data, tocopy);
2565
2566 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
2567 page, fsdata);
2568 offset = 0;
2569 towrite -= tocopy;
2570 off += tocopy;
2571 data += tocopy;
2572 cond_resched();
2573 }
2574
2575 if (len == towrite)
2576 return err;
2577 inode->i_mtime = inode->i_ctime = current_time(inode);
2578 f2fs_mark_inode_dirty_sync(inode, false);
2579 return len - towrite;
2580 }
2581
f2fs_dquot_initialize(struct inode * inode)2582 int f2fs_dquot_initialize(struct inode *inode)
2583 {
2584 if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
2585 f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
2586 return -ESRCH;
2587 }
2588
2589 return dquot_initialize(inode);
2590 }
2591
f2fs_get_dquots(struct inode * inode)2592 static struct dquot **f2fs_get_dquots(struct inode *inode)
2593 {
2594 return F2FS_I(inode)->i_dquot;
2595 }
2596
f2fs_get_reserved_space(struct inode * inode)2597 static qsize_t *f2fs_get_reserved_space(struct inode *inode)
2598 {
2599 return &F2FS_I(inode)->i_reserved_quota;
2600 }
2601
f2fs_quota_on_mount(struct f2fs_sb_info * sbi,int type)2602 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
2603 {
2604 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
2605 f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
2606 return 0;
2607 }
2608
2609 return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
2610 F2FS_OPTION(sbi).s_jquota_fmt, type);
2611 }
2612
f2fs_enable_quota_files(struct f2fs_sb_info * sbi,bool rdonly)2613 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
2614 {
2615 int enabled = 0;
2616 int i, err;
2617
2618 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
2619 err = f2fs_enable_quotas(sbi->sb);
2620 if (err) {
2621 f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
2622 return 0;
2623 }
2624 return 1;
2625 }
2626
2627 for (i = 0; i < MAXQUOTAS; i++) {
2628 if (F2FS_OPTION(sbi).s_qf_names[i]) {
2629 err = f2fs_quota_on_mount(sbi, i);
2630 if (!err) {
2631 enabled = 1;
2632 continue;
2633 }
2634 f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
2635 err, i);
2636 }
2637 }
2638 return enabled;
2639 }
2640
f2fs_quota_enable(struct super_block * sb,int type,int format_id,unsigned int flags)2641 static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
2642 unsigned int flags)
2643 {
2644 struct inode *qf_inode;
2645 unsigned long qf_inum;
2646 int err;
2647
2648 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
2649
2650 qf_inum = f2fs_qf_ino(sb, type);
2651 if (!qf_inum)
2652 return -EPERM;
2653
2654 qf_inode = f2fs_iget(sb, qf_inum);
2655 if (IS_ERR(qf_inode)) {
2656 f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
2657 return PTR_ERR(qf_inode);
2658 }
2659
2660 /* Don't account quota for quota files to avoid recursion */
2661 qf_inode->i_flags |= S_NOQUOTA;
2662 err = dquot_load_quota_inode(qf_inode, type, format_id, flags);
2663 iput(qf_inode);
2664 return err;
2665 }
2666
f2fs_enable_quotas(struct super_block * sb)2667 static int f2fs_enable_quotas(struct super_block *sb)
2668 {
2669 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2670 int type, err = 0;
2671 unsigned long qf_inum;
2672 bool quota_mopt[MAXQUOTAS] = {
2673 test_opt(sbi, USRQUOTA),
2674 test_opt(sbi, GRPQUOTA),
2675 test_opt(sbi, PRJQUOTA),
2676 };
2677
2678 if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
2679 f2fs_err(sbi, "quota file may be corrupted, skip loading it");
2680 return 0;
2681 }
2682
2683 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
2684
2685 for (type = 0; type < MAXQUOTAS; type++) {
2686 qf_inum = f2fs_qf_ino(sb, type);
2687 if (qf_inum) {
2688 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
2689 DQUOT_USAGE_ENABLED |
2690 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
2691 if (err) {
2692 f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
2693 type, err);
2694 for (type--; type >= 0; type--)
2695 dquot_quota_off(sb, type);
2696 set_sbi_flag(F2FS_SB(sb),
2697 SBI_QUOTA_NEED_REPAIR);
2698 return err;
2699 }
2700 }
2701 }
2702 return 0;
2703 }
2704
f2fs_quota_sync_file(struct f2fs_sb_info * sbi,int type)2705 static int f2fs_quota_sync_file(struct f2fs_sb_info *sbi, int type)
2706 {
2707 struct quota_info *dqopt = sb_dqopt(sbi->sb);
2708 struct address_space *mapping = dqopt->files[type]->i_mapping;
2709 int ret = 0;
2710
2711 ret = dquot_writeback_dquots(sbi->sb, type);
2712 if (ret)
2713 goto out;
2714
2715 ret = filemap_fdatawrite(mapping);
2716 if (ret)
2717 goto out;
2718
2719 /* if we are using journalled quota */
2720 if (is_journalled_quota(sbi))
2721 goto out;
2722
2723 ret = filemap_fdatawait(mapping);
2724
2725 truncate_inode_pages(&dqopt->files[type]->i_data, 0);
2726 out:
2727 if (ret)
2728 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2729 return ret;
2730 }
2731
f2fs_quota_sync(struct super_block * sb,int type)2732 int f2fs_quota_sync(struct super_block *sb, int type)
2733 {
2734 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2735 struct quota_info *dqopt = sb_dqopt(sb);
2736 int cnt;
2737 int ret = 0;
2738
2739 /*
2740 * Now when everything is written we can discard the pagecache so
2741 * that userspace sees the changes.
2742 */
2743 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
2744
2745 if (type != -1 && cnt != type)
2746 continue;
2747
2748 if (!sb_has_quota_active(sb, cnt))
2749 continue;
2750
2751 if (!f2fs_sb_has_quota_ino(sbi))
2752 inode_lock(dqopt->files[cnt]);
2753
2754 /*
2755 * do_quotactl
2756 * f2fs_quota_sync
2757 * f2fs_down_read(quota_sem)
2758 * dquot_writeback_dquots()
2759 * f2fs_dquot_commit
2760 * block_operation
2761 * f2fs_down_read(quota_sem)
2762 */
2763 f2fs_lock_op(sbi);
2764 f2fs_down_read(&sbi->quota_sem);
2765
2766 ret = f2fs_quota_sync_file(sbi, cnt);
2767
2768 f2fs_up_read(&sbi->quota_sem);
2769 f2fs_unlock_op(sbi);
2770
2771 if (!f2fs_sb_has_quota_ino(sbi))
2772 inode_unlock(dqopt->files[cnt]);
2773
2774 if (ret)
2775 break;
2776 }
2777 return ret;
2778 }
2779
f2fs_quota_on(struct super_block * sb,int type,int format_id,const struct path * path)2780 static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
2781 const struct path *path)
2782 {
2783 struct inode *inode;
2784 int err;
2785
2786 /* if quota sysfile exists, deny enabling quota with specific file */
2787 if (f2fs_sb_has_quota_ino(F2FS_SB(sb))) {
2788 f2fs_err(F2FS_SB(sb), "quota sysfile already exists");
2789 return -EBUSY;
2790 }
2791
2792 err = f2fs_quota_sync(sb, type);
2793 if (err)
2794 return err;
2795
2796 err = dquot_quota_on(sb, type, format_id, path);
2797 if (err)
2798 return err;
2799
2800 inode = d_inode(path->dentry);
2801
2802 inode_lock(inode);
2803 F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
2804 f2fs_set_inode_flags(inode);
2805 inode_unlock(inode);
2806 f2fs_mark_inode_dirty_sync(inode, false);
2807
2808 return 0;
2809 }
2810
__f2fs_quota_off(struct super_block * sb,int type)2811 static int __f2fs_quota_off(struct super_block *sb, int type)
2812 {
2813 struct inode *inode = sb_dqopt(sb)->files[type];
2814 int err;
2815
2816 if (!inode || !igrab(inode))
2817 return dquot_quota_off(sb, type);
2818
2819 err = f2fs_quota_sync(sb, type);
2820 if (err)
2821 goto out_put;
2822
2823 err = dquot_quota_off(sb, type);
2824 if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
2825 goto out_put;
2826
2827 inode_lock(inode);
2828 F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
2829 f2fs_set_inode_flags(inode);
2830 inode_unlock(inode);
2831 f2fs_mark_inode_dirty_sync(inode, false);
2832 out_put:
2833 iput(inode);
2834 return err;
2835 }
2836
f2fs_quota_off(struct super_block * sb,int type)2837 static int f2fs_quota_off(struct super_block *sb, int type)
2838 {
2839 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2840 int err;
2841
2842 err = __f2fs_quota_off(sb, type);
2843
2844 /*
2845 * quotactl can shutdown journalled quota, result in inconsistence
2846 * between quota record and fs data by following updates, tag the
2847 * flag to let fsck be aware of it.
2848 */
2849 if (is_journalled_quota(sbi))
2850 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2851 return err;
2852 }
2853
f2fs_quota_off_umount(struct super_block * sb)2854 void f2fs_quota_off_umount(struct super_block *sb)
2855 {
2856 int type;
2857 int err;
2858
2859 for (type = 0; type < MAXQUOTAS; type++) {
2860 err = __f2fs_quota_off(sb, type);
2861 if (err) {
2862 int ret = dquot_quota_off(sb, type);
2863
2864 f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
2865 type, err, ret);
2866 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2867 }
2868 }
2869 /*
2870 * In case of checkpoint=disable, we must flush quota blocks.
2871 * This can cause NULL exception for node_inode in end_io, since
2872 * put_super already dropped it.
2873 */
2874 sync_filesystem(sb);
2875 }
2876
f2fs_truncate_quota_inode_pages(struct super_block * sb)2877 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2878 {
2879 struct quota_info *dqopt = sb_dqopt(sb);
2880 int type;
2881
2882 for (type = 0; type < MAXQUOTAS; type++) {
2883 if (!dqopt->files[type])
2884 continue;
2885 f2fs_inode_synced(dqopt->files[type]);
2886 }
2887 }
2888
f2fs_dquot_commit(struct dquot * dquot)2889 static int f2fs_dquot_commit(struct dquot *dquot)
2890 {
2891 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2892 int ret;
2893
2894 f2fs_down_read_nested(&sbi->quota_sem, SINGLE_DEPTH_NESTING);
2895 ret = dquot_commit(dquot);
2896 if (ret < 0)
2897 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2898 f2fs_up_read(&sbi->quota_sem);
2899 return ret;
2900 }
2901
f2fs_dquot_acquire(struct dquot * dquot)2902 static int f2fs_dquot_acquire(struct dquot *dquot)
2903 {
2904 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2905 int ret;
2906
2907 f2fs_down_read(&sbi->quota_sem);
2908 ret = dquot_acquire(dquot);
2909 if (ret < 0)
2910 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2911 f2fs_up_read(&sbi->quota_sem);
2912 return ret;
2913 }
2914
f2fs_dquot_release(struct dquot * dquot)2915 static int f2fs_dquot_release(struct dquot *dquot)
2916 {
2917 struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
2918 int ret = dquot_release(dquot);
2919
2920 if (ret < 0)
2921 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2922 return ret;
2923 }
2924
f2fs_dquot_mark_dquot_dirty(struct dquot * dquot)2925 static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2926 {
2927 struct super_block *sb = dquot->dq_sb;
2928 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2929 int ret = dquot_mark_dquot_dirty(dquot);
2930
2931 /* if we are using journalled quota */
2932 if (is_journalled_quota(sbi))
2933 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2934
2935 return ret;
2936 }
2937
f2fs_dquot_commit_info(struct super_block * sb,int type)2938 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2939 {
2940 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2941 int ret = dquot_commit_info(sb, type);
2942
2943 if (ret < 0)
2944 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
2945 return ret;
2946 }
2947
f2fs_get_projid(struct inode * inode,kprojid_t * projid)2948 static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
2949 {
2950 *projid = F2FS_I(inode)->i_projid;
2951 return 0;
2952 }
2953
2954 static const struct dquot_operations f2fs_quota_operations = {
2955 .get_reserved_space = f2fs_get_reserved_space,
2956 .write_dquot = f2fs_dquot_commit,
2957 .acquire_dquot = f2fs_dquot_acquire,
2958 .release_dquot = f2fs_dquot_release,
2959 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
2960 .write_info = f2fs_dquot_commit_info,
2961 .alloc_dquot = dquot_alloc,
2962 .destroy_dquot = dquot_destroy,
2963 .get_projid = f2fs_get_projid,
2964 .get_next_id = dquot_get_next_id,
2965 };
2966
2967 static const struct quotactl_ops f2fs_quotactl_ops = {
2968 .quota_on = f2fs_quota_on,
2969 .quota_off = f2fs_quota_off,
2970 .quota_sync = f2fs_quota_sync,
2971 .get_state = dquot_get_state,
2972 .set_info = dquot_set_dqinfo,
2973 .get_dqblk = dquot_get_dqblk,
2974 .set_dqblk = dquot_set_dqblk,
2975 .get_nextdqblk = dquot_get_next_dqblk,
2976 };
2977 #else
f2fs_dquot_initialize(struct inode * inode)2978 int f2fs_dquot_initialize(struct inode *inode)
2979 {
2980 return 0;
2981 }
2982
f2fs_quota_sync(struct super_block * sb,int type)2983 int f2fs_quota_sync(struct super_block *sb, int type)
2984 {
2985 return 0;
2986 }
2987
f2fs_quota_off_umount(struct super_block * sb)2988 void f2fs_quota_off_umount(struct super_block *sb)
2989 {
2990 }
2991 #endif
2992
2993 static const struct super_operations f2fs_sops = {
2994 .alloc_inode = f2fs_alloc_inode,
2995 .free_inode = f2fs_free_inode,
2996 .drop_inode = f2fs_drop_inode,
2997 .write_inode = f2fs_write_inode,
2998 .dirty_inode = f2fs_dirty_inode,
2999 .show_options = f2fs_show_options,
3000 #ifdef CONFIG_QUOTA
3001 .quota_read = f2fs_quota_read,
3002 .quota_write = f2fs_quota_write,
3003 .get_dquots = f2fs_get_dquots,
3004 #endif
3005 .evict_inode = f2fs_evict_inode,
3006 .put_super = f2fs_put_super,
3007 .sync_fs = f2fs_sync_fs,
3008 .freeze_fs = f2fs_freeze,
3009 .unfreeze_fs = f2fs_unfreeze,
3010 .statfs = f2fs_statfs,
3011 .remount_fs = f2fs_remount,
3012 };
3013
3014 #ifdef CONFIG_FS_ENCRYPTION
f2fs_get_context(struct inode * inode,void * ctx,size_t len)3015 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
3016 {
3017 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3018 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3019 ctx, len, NULL);
3020 }
3021
f2fs_set_context(struct inode * inode,const void * ctx,size_t len,void * fs_data)3022 static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
3023 void *fs_data)
3024 {
3025 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3026
3027 /*
3028 * Encrypting the root directory is not allowed because fsck
3029 * expects lost+found directory to exist and remain unencrypted
3030 * if LOST_FOUND feature is enabled.
3031 *
3032 */
3033 if (f2fs_sb_has_lost_found(sbi) &&
3034 inode->i_ino == F2FS_ROOT_INO(sbi))
3035 return -EPERM;
3036
3037 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
3038 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
3039 ctx, len, fs_data, XATTR_CREATE);
3040 }
3041
f2fs_get_dummy_policy(struct super_block * sb)3042 static const union fscrypt_policy *f2fs_get_dummy_policy(struct super_block *sb)
3043 {
3044 return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_policy.policy;
3045 }
3046
f2fs_has_stable_inodes(struct super_block * sb)3047 static bool f2fs_has_stable_inodes(struct super_block *sb)
3048 {
3049 return true;
3050 }
3051
f2fs_get_ino_and_lblk_bits(struct super_block * sb,int * ino_bits_ret,int * lblk_bits_ret)3052 static void f2fs_get_ino_and_lblk_bits(struct super_block *sb,
3053 int *ino_bits_ret, int *lblk_bits_ret)
3054 {
3055 *ino_bits_ret = 8 * sizeof(nid_t);
3056 *lblk_bits_ret = 8 * sizeof(block_t);
3057 }
3058
f2fs_get_num_devices(struct super_block * sb)3059 static int f2fs_get_num_devices(struct super_block *sb)
3060 {
3061 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3062
3063 if (f2fs_is_multi_device(sbi))
3064 return sbi->s_ndevs;
3065 return 1;
3066 }
3067
f2fs_get_devices(struct super_block * sb,struct request_queue ** devs)3068 static void f2fs_get_devices(struct super_block *sb,
3069 struct request_queue **devs)
3070 {
3071 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3072 int i;
3073
3074 for (i = 0; i < sbi->s_ndevs; i++)
3075 devs[i] = bdev_get_queue(FDEV(i).bdev);
3076 }
3077
3078 static const struct fscrypt_operations f2fs_cryptops = {
3079 .key_prefix = "f2fs:",
3080 .get_context = f2fs_get_context,
3081 .set_context = f2fs_set_context,
3082 .get_dummy_policy = f2fs_get_dummy_policy,
3083 .empty_dir = f2fs_empty_dir,
3084 .has_stable_inodes = f2fs_has_stable_inodes,
3085 .get_ino_and_lblk_bits = f2fs_get_ino_and_lblk_bits,
3086 .get_num_devices = f2fs_get_num_devices,
3087 .get_devices = f2fs_get_devices,
3088 };
3089 #endif
3090
f2fs_nfs_get_inode(struct super_block * sb,u64 ino,u32 generation)3091 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
3092 u64 ino, u32 generation)
3093 {
3094 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3095 struct inode *inode;
3096
3097 if (f2fs_check_nid_range(sbi, ino))
3098 return ERR_PTR(-ESTALE);
3099
3100 /*
3101 * f2fs_iget isn't quite right if the inode is currently unallocated!
3102 * However f2fs_iget currently does appropriate checks to handle stale
3103 * inodes so everything is OK.
3104 */
3105 inode = f2fs_iget(sb, ino);
3106 if (IS_ERR(inode))
3107 return ERR_CAST(inode);
3108 if (unlikely(generation && inode->i_generation != generation)) {
3109 /* we didn't find the right inode.. */
3110 iput(inode);
3111 return ERR_PTR(-ESTALE);
3112 }
3113 return inode;
3114 }
3115
f2fs_fh_to_dentry(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)3116 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
3117 int fh_len, int fh_type)
3118 {
3119 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
3120 f2fs_nfs_get_inode);
3121 }
3122
f2fs_fh_to_parent(struct super_block * sb,struct fid * fid,int fh_len,int fh_type)3123 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
3124 int fh_len, int fh_type)
3125 {
3126 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
3127 f2fs_nfs_get_inode);
3128 }
3129
3130 static const struct export_operations f2fs_export_ops = {
3131 .fh_to_dentry = f2fs_fh_to_dentry,
3132 .fh_to_parent = f2fs_fh_to_parent,
3133 .get_parent = f2fs_get_parent,
3134 };
3135
max_file_blocks(struct inode * inode)3136 loff_t max_file_blocks(struct inode *inode)
3137 {
3138 loff_t result = 0;
3139 loff_t leaf_count;
3140
3141 /*
3142 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
3143 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
3144 * space in inode.i_addr, it will be more safe to reassign
3145 * result as zero.
3146 */
3147
3148 if (inode && f2fs_compressed_file(inode))
3149 leaf_count = ADDRS_PER_BLOCK(inode);
3150 else
3151 leaf_count = DEF_ADDRS_PER_BLOCK;
3152
3153 /* two direct node blocks */
3154 result += (leaf_count * 2);
3155
3156 /* two indirect node blocks */
3157 leaf_count *= NIDS_PER_BLOCK;
3158 result += (leaf_count * 2);
3159
3160 /* one double indirect node block */
3161 leaf_count *= NIDS_PER_BLOCK;
3162 result += leaf_count;
3163
3164 return result;
3165 }
3166
__f2fs_commit_super(struct buffer_head * bh,struct f2fs_super_block * super)3167 static int __f2fs_commit_super(struct buffer_head *bh,
3168 struct f2fs_super_block *super)
3169 {
3170 lock_buffer(bh);
3171 if (super)
3172 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
3173 set_buffer_dirty(bh);
3174 unlock_buffer(bh);
3175
3176 /* it's rare case, we can do fua all the time */
3177 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
3178 }
3179
sanity_check_area_boundary(struct f2fs_sb_info * sbi,struct buffer_head * bh)3180 static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
3181 struct buffer_head *bh)
3182 {
3183 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3184 (bh->b_data + F2FS_SUPER_OFFSET);
3185 struct super_block *sb = sbi->sb;
3186 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
3187 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
3188 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
3189 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
3190 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
3191 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
3192 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
3193 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
3194 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
3195 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
3196 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3197 u32 segment_count = le32_to_cpu(raw_super->segment_count);
3198 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3199 u64 main_end_blkaddr = main_blkaddr +
3200 (segment_count_main << log_blocks_per_seg);
3201 u64 seg_end_blkaddr = segment0_blkaddr +
3202 (segment_count << log_blocks_per_seg);
3203
3204 if (segment0_blkaddr != cp_blkaddr) {
3205 f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
3206 segment0_blkaddr, cp_blkaddr);
3207 return true;
3208 }
3209
3210 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
3211 sit_blkaddr) {
3212 f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
3213 cp_blkaddr, sit_blkaddr,
3214 segment_count_ckpt << log_blocks_per_seg);
3215 return true;
3216 }
3217
3218 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
3219 nat_blkaddr) {
3220 f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
3221 sit_blkaddr, nat_blkaddr,
3222 segment_count_sit << log_blocks_per_seg);
3223 return true;
3224 }
3225
3226 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
3227 ssa_blkaddr) {
3228 f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
3229 nat_blkaddr, ssa_blkaddr,
3230 segment_count_nat << log_blocks_per_seg);
3231 return true;
3232 }
3233
3234 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
3235 main_blkaddr) {
3236 f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
3237 ssa_blkaddr, main_blkaddr,
3238 segment_count_ssa << log_blocks_per_seg);
3239 return true;
3240 }
3241
3242 if (main_end_blkaddr > seg_end_blkaddr) {
3243 f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%llu) block(%u)",
3244 main_blkaddr, seg_end_blkaddr,
3245 segment_count_main << log_blocks_per_seg);
3246 return true;
3247 } else if (main_end_blkaddr < seg_end_blkaddr) {
3248 int err = 0;
3249 char *res;
3250
3251 /* fix in-memory information all the time */
3252 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
3253 segment0_blkaddr) >> log_blocks_per_seg);
3254
3255 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
3256 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3257 res = "internally";
3258 } else {
3259 err = __f2fs_commit_super(bh, NULL);
3260 res = err ? "failed" : "done";
3261 }
3262 f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%llu) block(%u)",
3263 res, main_blkaddr, seg_end_blkaddr,
3264 segment_count_main << log_blocks_per_seg);
3265 if (err)
3266 return true;
3267 }
3268 return false;
3269 }
3270
sanity_check_raw_super(struct f2fs_sb_info * sbi,struct buffer_head * bh)3271 static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
3272 struct buffer_head *bh)
3273 {
3274 block_t segment_count, segs_per_sec, secs_per_zone, segment_count_main;
3275 block_t total_sections, blocks_per_seg;
3276 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
3277 (bh->b_data + F2FS_SUPER_OFFSET);
3278 size_t crc_offset = 0;
3279 __u32 crc = 0;
3280
3281 if (le32_to_cpu(raw_super->magic) != F2FS_SUPER_MAGIC) {
3282 f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
3283 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
3284 return -EINVAL;
3285 }
3286
3287 /* Check checksum_offset and crc in superblock */
3288 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
3289 crc_offset = le32_to_cpu(raw_super->checksum_offset);
3290 if (crc_offset !=
3291 offsetof(struct f2fs_super_block, crc)) {
3292 f2fs_info(sbi, "Invalid SB checksum offset: %zu",
3293 crc_offset);
3294 return -EFSCORRUPTED;
3295 }
3296 crc = le32_to_cpu(raw_super->crc);
3297 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
3298 f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
3299 return -EFSCORRUPTED;
3300 }
3301 }
3302
3303 /* Currently, support only 4KB block size */
3304 if (le32_to_cpu(raw_super->log_blocksize) != F2FS_BLKSIZE_BITS) {
3305 f2fs_info(sbi, "Invalid log_blocksize (%u), supports only %u",
3306 le32_to_cpu(raw_super->log_blocksize),
3307 F2FS_BLKSIZE_BITS);
3308 return -EFSCORRUPTED;
3309 }
3310
3311 /* check log blocks per segment */
3312 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
3313 f2fs_info(sbi, "Invalid log blocks per segment (%u)",
3314 le32_to_cpu(raw_super->log_blocks_per_seg));
3315 return -EFSCORRUPTED;
3316 }
3317
3318 /* Currently, support 512/1024/2048/4096 bytes sector size */
3319 if (le32_to_cpu(raw_super->log_sectorsize) >
3320 F2FS_MAX_LOG_SECTOR_SIZE ||
3321 le32_to_cpu(raw_super->log_sectorsize) <
3322 F2FS_MIN_LOG_SECTOR_SIZE) {
3323 f2fs_info(sbi, "Invalid log sectorsize (%u)",
3324 le32_to_cpu(raw_super->log_sectorsize));
3325 return -EFSCORRUPTED;
3326 }
3327 if (le32_to_cpu(raw_super->log_sectors_per_block) +
3328 le32_to_cpu(raw_super->log_sectorsize) !=
3329 F2FS_MAX_LOG_SECTOR_SIZE) {
3330 f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
3331 le32_to_cpu(raw_super->log_sectors_per_block),
3332 le32_to_cpu(raw_super->log_sectorsize));
3333 return -EFSCORRUPTED;
3334 }
3335
3336 segment_count = le32_to_cpu(raw_super->segment_count);
3337 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
3338 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3339 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3340 total_sections = le32_to_cpu(raw_super->section_count);
3341
3342 /* blocks_per_seg should be 512, given the above check */
3343 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
3344
3345 if (segment_count > F2FS_MAX_SEGMENT ||
3346 segment_count < F2FS_MIN_SEGMENTS) {
3347 f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
3348 return -EFSCORRUPTED;
3349 }
3350
3351 if (total_sections > segment_count_main || total_sections < 1 ||
3352 segs_per_sec > segment_count || !segs_per_sec) {
3353 f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
3354 segment_count, total_sections, segs_per_sec);
3355 return -EFSCORRUPTED;
3356 }
3357
3358 if (segment_count_main != total_sections * segs_per_sec) {
3359 f2fs_info(sbi, "Invalid segment/section count (%u != %u * %u)",
3360 segment_count_main, total_sections, segs_per_sec);
3361 return -EFSCORRUPTED;
3362 }
3363
3364 if ((segment_count / segs_per_sec) < total_sections) {
3365 f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
3366 segment_count, segs_per_sec, total_sections);
3367 return -EFSCORRUPTED;
3368 }
3369
3370 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
3371 f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
3372 segment_count, le64_to_cpu(raw_super->block_count));
3373 return -EFSCORRUPTED;
3374 }
3375
3376 if (RDEV(0).path[0]) {
3377 block_t dev_seg_count = le32_to_cpu(RDEV(0).total_segments);
3378 int i = 1;
3379
3380 while (i < MAX_DEVICES && RDEV(i).path[0]) {
3381 dev_seg_count += le32_to_cpu(RDEV(i).total_segments);
3382 i++;
3383 }
3384 if (segment_count != dev_seg_count) {
3385 f2fs_info(sbi, "Segment count (%u) mismatch with total segments from devices (%u)",
3386 segment_count, dev_seg_count);
3387 return -EFSCORRUPTED;
3388 }
3389 } else {
3390 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_BLKZONED) &&
3391 !bdev_is_zoned(sbi->sb->s_bdev)) {
3392 f2fs_info(sbi, "Zoned block device path is missing");
3393 return -EFSCORRUPTED;
3394 }
3395 }
3396
3397 if (secs_per_zone > total_sections || !secs_per_zone) {
3398 f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
3399 secs_per_zone, total_sections);
3400 return -EFSCORRUPTED;
3401 }
3402 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
3403 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
3404 (le32_to_cpu(raw_super->extension_count) +
3405 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
3406 f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
3407 le32_to_cpu(raw_super->extension_count),
3408 raw_super->hot_ext_count,
3409 F2FS_MAX_EXTENSION);
3410 return -EFSCORRUPTED;
3411 }
3412
3413 if (le32_to_cpu(raw_super->cp_payload) >=
3414 (blocks_per_seg - F2FS_CP_PACKS -
3415 NR_CURSEG_PERSIST_TYPE)) {
3416 f2fs_info(sbi, "Insane cp_payload (%u >= %u)",
3417 le32_to_cpu(raw_super->cp_payload),
3418 blocks_per_seg - F2FS_CP_PACKS -
3419 NR_CURSEG_PERSIST_TYPE);
3420 return -EFSCORRUPTED;
3421 }
3422
3423 /* check reserved ino info */
3424 if (le32_to_cpu(raw_super->node_ino) != 1 ||
3425 le32_to_cpu(raw_super->meta_ino) != 2 ||
3426 le32_to_cpu(raw_super->root_ino) != 3) {
3427 f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
3428 le32_to_cpu(raw_super->node_ino),
3429 le32_to_cpu(raw_super->meta_ino),
3430 le32_to_cpu(raw_super->root_ino));
3431 return -EFSCORRUPTED;
3432 }
3433
3434 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
3435 if (sanity_check_area_boundary(sbi, bh))
3436 return -EFSCORRUPTED;
3437
3438 return 0;
3439 }
3440
f2fs_sanity_check_ckpt(struct f2fs_sb_info * sbi)3441 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
3442 {
3443 unsigned int total, fsmeta;
3444 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3445 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
3446 unsigned int ovp_segments, reserved_segments;
3447 unsigned int main_segs, blocks_per_seg;
3448 unsigned int sit_segs, nat_segs;
3449 unsigned int sit_bitmap_size, nat_bitmap_size;
3450 unsigned int log_blocks_per_seg;
3451 unsigned int segment_count_main;
3452 unsigned int cp_pack_start_sum, cp_payload;
3453 block_t user_block_count, valid_user_blocks;
3454 block_t avail_node_count, valid_node_count;
3455 unsigned int nat_blocks, nat_bits_bytes, nat_bits_blocks;
3456 int i, j;
3457
3458 total = le32_to_cpu(raw_super->segment_count);
3459 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
3460 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
3461 fsmeta += sit_segs;
3462 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
3463 fsmeta += nat_segs;
3464 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
3465 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
3466
3467 if (unlikely(fsmeta >= total))
3468 return 1;
3469
3470 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
3471 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
3472
3473 if (!f2fs_sb_has_readonly(sbi) &&
3474 unlikely(fsmeta < F2FS_MIN_META_SEGMENTS ||
3475 ovp_segments == 0 || reserved_segments == 0)) {
3476 f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
3477 return 1;
3478 }
3479 user_block_count = le64_to_cpu(ckpt->user_block_count);
3480 segment_count_main = le32_to_cpu(raw_super->segment_count_main) +
3481 (f2fs_sb_has_readonly(sbi) ? 1 : 0);
3482 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3483 if (!user_block_count || user_block_count >=
3484 segment_count_main << log_blocks_per_seg) {
3485 f2fs_err(sbi, "Wrong user_block_count: %u",
3486 user_block_count);
3487 return 1;
3488 }
3489
3490 valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
3491 if (valid_user_blocks > user_block_count) {
3492 f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
3493 valid_user_blocks, user_block_count);
3494 return 1;
3495 }
3496
3497 valid_node_count = le32_to_cpu(ckpt->valid_node_count);
3498 avail_node_count = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
3499 if (valid_node_count > avail_node_count) {
3500 f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
3501 valid_node_count, avail_node_count);
3502 return 1;
3503 }
3504
3505 main_segs = le32_to_cpu(raw_super->segment_count_main);
3506 blocks_per_seg = sbi->blocks_per_seg;
3507
3508 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3509 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
3510 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
3511 return 1;
3512
3513 if (f2fs_sb_has_readonly(sbi))
3514 goto check_data;
3515
3516 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
3517 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3518 le32_to_cpu(ckpt->cur_node_segno[j])) {
3519 f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
3520 i, j,
3521 le32_to_cpu(ckpt->cur_node_segno[i]));
3522 return 1;
3523 }
3524 }
3525 }
3526 check_data:
3527 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
3528 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
3529 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
3530 return 1;
3531
3532 if (f2fs_sb_has_readonly(sbi))
3533 goto skip_cross;
3534
3535 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
3536 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
3537 le32_to_cpu(ckpt->cur_data_segno[j])) {
3538 f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
3539 i, j,
3540 le32_to_cpu(ckpt->cur_data_segno[i]));
3541 return 1;
3542 }
3543 }
3544 }
3545 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
3546 for (j = 0; j < NR_CURSEG_DATA_TYPE; j++) {
3547 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
3548 le32_to_cpu(ckpt->cur_data_segno[j])) {
3549 f2fs_err(sbi, "Node segment (%u) and Data segment (%u) has the same segno: %u",
3550 i, j,
3551 le32_to_cpu(ckpt->cur_node_segno[i]));
3552 return 1;
3553 }
3554 }
3555 }
3556 skip_cross:
3557 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
3558 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
3559
3560 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
3561 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
3562 f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
3563 sit_bitmap_size, nat_bitmap_size);
3564 return 1;
3565 }
3566
3567 cp_pack_start_sum = __start_sum_addr(sbi);
3568 cp_payload = __cp_payload(sbi);
3569 if (cp_pack_start_sum < cp_payload + 1 ||
3570 cp_pack_start_sum > blocks_per_seg - 1 -
3571 NR_CURSEG_PERSIST_TYPE) {
3572 f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
3573 cp_pack_start_sum);
3574 return 1;
3575 }
3576
3577 if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
3578 le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
3579 f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
3580 "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
3581 "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
3582 le32_to_cpu(ckpt->checksum_offset));
3583 return 1;
3584 }
3585
3586 nat_blocks = nat_segs << log_blocks_per_seg;
3587 nat_bits_bytes = nat_blocks / BITS_PER_BYTE;
3588 nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
3589 if (__is_set_ckpt_flags(ckpt, CP_NAT_BITS_FLAG) &&
3590 (cp_payload + F2FS_CP_PACKS +
3591 NR_CURSEG_PERSIST_TYPE + nat_bits_blocks >= blocks_per_seg)) {
3592 f2fs_warn(sbi, "Insane cp_payload: %u, nat_bits_blocks: %u)",
3593 cp_payload, nat_bits_blocks);
3594 return 1;
3595 }
3596
3597 if (unlikely(f2fs_cp_error(sbi))) {
3598 f2fs_err(sbi, "A bug case: need to run fsck");
3599 return 1;
3600 }
3601 return 0;
3602 }
3603
init_sb_info(struct f2fs_sb_info * sbi)3604 static void init_sb_info(struct f2fs_sb_info *sbi)
3605 {
3606 struct f2fs_super_block *raw_super = sbi->raw_super;
3607 int i;
3608
3609 sbi->log_sectors_per_block =
3610 le32_to_cpu(raw_super->log_sectors_per_block);
3611 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
3612 sbi->blocksize = 1 << sbi->log_blocksize;
3613 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
3614 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
3615 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
3616 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
3617 sbi->total_sections = le32_to_cpu(raw_super->section_count);
3618 sbi->total_node_count =
3619 (le32_to_cpu(raw_super->segment_count_nat) / 2)
3620 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
3621 F2FS_ROOT_INO(sbi) = le32_to_cpu(raw_super->root_ino);
3622 F2FS_NODE_INO(sbi) = le32_to_cpu(raw_super->node_ino);
3623 F2FS_META_INO(sbi) = le32_to_cpu(raw_super->meta_ino);
3624 sbi->cur_victim_sec = NULL_SECNO;
3625 sbi->gc_mode = GC_NORMAL;
3626 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
3627 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
3628 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
3629 sbi->migration_granularity = sbi->segs_per_sec;
3630 sbi->seq_file_ra_mul = MIN_RA_MUL;
3631 sbi->max_fragment_chunk = DEF_FRAGMENT_SIZE;
3632 sbi->max_fragment_hole = DEF_FRAGMENT_SIZE;
3633 spin_lock_init(&sbi->gc_urgent_high_lock);
3634
3635 sbi->dir_level = DEF_DIR_LEVEL;
3636 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
3637 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
3638 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
3639 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
3640 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
3641 sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
3642 DEF_UMOUNT_DISCARD_TIMEOUT;
3643 clear_sbi_flag(sbi, SBI_NEED_FSCK);
3644
3645 for (i = 0; i < NR_COUNT_TYPE; i++)
3646 atomic_set(&sbi->nr_pages[i], 0);
3647
3648 for (i = 0; i < META; i++)
3649 atomic_set(&sbi->wb_sync_req[i], 0);
3650
3651 INIT_LIST_HEAD(&sbi->s_list);
3652 mutex_init(&sbi->umount_mutex);
3653 init_f2fs_rwsem(&sbi->io_order_lock);
3654 spin_lock_init(&sbi->cp_lock);
3655
3656 sbi->dirty_device = 0;
3657 spin_lock_init(&sbi->dev_lock);
3658
3659 init_f2fs_rwsem(&sbi->sb_lock);
3660 init_f2fs_rwsem(&sbi->pin_sem);
3661 }
3662
init_percpu_info(struct f2fs_sb_info * sbi)3663 static int init_percpu_info(struct f2fs_sb_info *sbi)
3664 {
3665 int err;
3666
3667 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
3668 if (err)
3669 return err;
3670
3671 err = percpu_counter_init(&sbi->rf_node_block_count, 0, GFP_KERNEL);
3672 if (err)
3673 goto err_valid_block;
3674
3675 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
3676 GFP_KERNEL);
3677 if (err)
3678 goto err_node_block;
3679 return 0;
3680
3681 err_node_block:
3682 percpu_counter_destroy(&sbi->rf_node_block_count);
3683 err_valid_block:
3684 percpu_counter_destroy(&sbi->alloc_valid_block_count);
3685 return err;
3686 }
3687
3688 #ifdef CONFIG_BLK_DEV_ZONED
3689
3690 struct f2fs_report_zones_args {
3691 struct f2fs_sb_info *sbi;
3692 struct f2fs_dev_info *dev;
3693 };
3694
f2fs_report_zone_cb(struct blk_zone * zone,unsigned int idx,void * data)3695 static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
3696 void *data)
3697 {
3698 struct f2fs_report_zones_args *rz_args = data;
3699 block_t unusable_blocks = (zone->len - zone->capacity) >>
3700 F2FS_LOG_SECTORS_PER_BLOCK;
3701
3702 if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
3703 return 0;
3704
3705 set_bit(idx, rz_args->dev->blkz_seq);
3706 if (!rz_args->sbi->unusable_blocks_per_sec) {
3707 rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
3708 return 0;
3709 }
3710 if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
3711 f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
3712 return -EINVAL;
3713 }
3714 return 0;
3715 }
3716
init_blkz_info(struct f2fs_sb_info * sbi,int devi)3717 static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
3718 {
3719 struct block_device *bdev = FDEV(devi).bdev;
3720 sector_t nr_sectors = bdev->bd_part->nr_sects;
3721 struct f2fs_report_zones_args rep_zone_arg;
3722 int ret;
3723
3724 if (!f2fs_sb_has_blkzoned(sbi))
3725 return 0;
3726
3727 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
3728 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3729 return -EINVAL;
3730 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3731 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
3732 __ilog2_u32(sbi->blocks_per_blkz))
3733 return -EINVAL;
3734 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3735 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
3736 sbi->log_blocks_per_blkz;
3737 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3738 FDEV(devi).nr_blkz++;
3739
3740 FDEV(devi).blkz_seq = f2fs_kvzalloc(sbi,
3741 BITS_TO_LONGS(FDEV(devi).nr_blkz)
3742 * sizeof(unsigned long),
3743 GFP_KERNEL);
3744 if (!FDEV(devi).blkz_seq)
3745 return -ENOMEM;
3746
3747 rep_zone_arg.sbi = sbi;
3748 rep_zone_arg.dev = &FDEV(devi);
3749
3750 ret = blkdev_report_zones(bdev, 0, BLK_ALL_ZONES, f2fs_report_zone_cb,
3751 &rep_zone_arg);
3752 if (ret < 0)
3753 return ret;
3754 return 0;
3755 }
3756 #endif
3757
3758 /*
3759 * Read f2fs raw super block.
3760 * Because we have two copies of super block, so read both of them
3761 * to get the first valid one. If any one of them is broken, we pass
3762 * them recovery flag back to the caller.
3763 */
read_raw_super_block(struct f2fs_sb_info * sbi,struct f2fs_super_block ** raw_super,int * valid_super_block,int * recovery)3764 static int read_raw_super_block(struct f2fs_sb_info *sbi,
3765 struct f2fs_super_block **raw_super,
3766 int *valid_super_block, int *recovery)
3767 {
3768 struct super_block *sb = sbi->sb;
3769 int block;
3770 struct buffer_head *bh;
3771 struct f2fs_super_block *super;
3772 int err = 0;
3773
3774 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
3775 if (!super)
3776 return -ENOMEM;
3777
3778 for (block = 0; block < 2; block++) {
3779 bh = sb_bread(sb, block);
3780 if (!bh) {
3781 f2fs_err(sbi, "Unable to read %dth superblock",
3782 block + 1);
3783 err = -EIO;
3784 *recovery = 1;
3785 continue;
3786 }
3787
3788 /* sanity checking of raw super */
3789 err = sanity_check_raw_super(sbi, bh);
3790 if (err) {
3791 f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
3792 block + 1);
3793 brelse(bh);
3794 *recovery = 1;
3795 continue;
3796 }
3797
3798 if (!*raw_super) {
3799 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
3800 sizeof(*super));
3801 *valid_super_block = block;
3802 *raw_super = super;
3803 }
3804 brelse(bh);
3805 }
3806
3807 /* No valid superblock */
3808 if (!*raw_super)
3809 kfree(super);
3810 else
3811 err = 0;
3812
3813 return err;
3814 }
3815
f2fs_commit_super(struct f2fs_sb_info * sbi,bool recover)3816 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
3817 {
3818 struct buffer_head *bh;
3819 __u32 crc = 0;
3820 int err;
3821
3822 if ((recover && f2fs_readonly(sbi->sb)) ||
3823 bdev_read_only(sbi->sb->s_bdev)) {
3824 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
3825 return -EROFS;
3826 }
3827
3828 /* we should update superblock crc here */
3829 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
3830 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
3831 offsetof(struct f2fs_super_block, crc));
3832 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
3833 }
3834
3835 /* write back-up superblock first */
3836 bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
3837 if (!bh)
3838 return -EIO;
3839 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3840 brelse(bh);
3841
3842 /* if we are in recovery path, skip writing valid superblock */
3843 if (recover || err)
3844 return err;
3845
3846 /* write current valid superblock */
3847 bh = sb_bread(sbi->sb, sbi->valid_super_block);
3848 if (!bh)
3849 return -EIO;
3850 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
3851 brelse(bh);
3852 return err;
3853 }
3854
f2fs_handle_stop(struct f2fs_sb_info * sbi,unsigned char reason)3855 void f2fs_handle_stop(struct f2fs_sb_info *sbi, unsigned char reason)
3856 {
3857 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3858 int err;
3859
3860 f2fs_bug_on(sbi, reason >= MAX_STOP_REASON);
3861
3862 f2fs_down_write(&sbi->sb_lock);
3863
3864 if (raw_super->s_stop_reason[reason] < ((1 << BITS_PER_BYTE) - 1))
3865 raw_super->s_stop_reason[reason]++;
3866
3867 err = f2fs_commit_super(sbi, false);
3868 if (err)
3869 f2fs_err(sbi, "f2fs_commit_super fails to record reason:%u err:%d",
3870 reason, err);
3871
3872 f2fs_up_write(&sbi->sb_lock);
3873 }
3874
f2fs_scan_devices(struct f2fs_sb_info * sbi)3875 static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
3876 {
3877 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
3878 unsigned int max_devices = MAX_DEVICES;
3879 unsigned int logical_blksize;
3880 int i;
3881
3882 /* Initialize single device information */
3883 if (!RDEV(0).path[0]) {
3884 if (!bdev_is_zoned(sbi->sb->s_bdev))
3885 return 0;
3886 max_devices = 1;
3887 }
3888
3889 /*
3890 * Initialize multiple devices information, or single
3891 * zoned block device information.
3892 */
3893 sbi->devs = f2fs_kzalloc(sbi,
3894 array_size(max_devices,
3895 sizeof(struct f2fs_dev_info)),
3896 GFP_KERNEL);
3897 if (!sbi->devs)
3898 return -ENOMEM;
3899
3900 logical_blksize = bdev_logical_block_size(sbi->sb->s_bdev);
3901 sbi->aligned_blksize = true;
3902
3903 for (i = 0; i < max_devices; i++) {
3904
3905 if (i > 0 && !RDEV(i).path[0])
3906 break;
3907
3908 if (max_devices == 1) {
3909 /* Single zoned block device mount */
3910 FDEV(0).bdev =
3911 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3912 sbi->sb->s_mode, sbi->sb->s_type);
3913 } else {
3914 /* Multi-device mount */
3915 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
3916 FDEV(i).total_segments =
3917 le32_to_cpu(RDEV(i).total_segments);
3918 if (i == 0) {
3919 FDEV(i).start_blk = 0;
3920 FDEV(i).end_blk = FDEV(i).start_blk +
3921 (FDEV(i).total_segments <<
3922 sbi->log_blocks_per_seg) - 1 +
3923 le32_to_cpu(raw_super->segment0_blkaddr);
3924 } else {
3925 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
3926 FDEV(i).end_blk = FDEV(i).start_blk +
3927 (FDEV(i).total_segments <<
3928 sbi->log_blocks_per_seg) - 1;
3929 }
3930 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3931 sbi->sb->s_mode, sbi->sb->s_type);
3932 }
3933 if (IS_ERR(FDEV(i).bdev))
3934 return PTR_ERR(FDEV(i).bdev);
3935
3936 /* to release errored devices */
3937 sbi->s_ndevs = i + 1;
3938
3939 if (logical_blksize != bdev_logical_block_size(FDEV(i).bdev))
3940 sbi->aligned_blksize = false;
3941
3942 #ifdef CONFIG_BLK_DEV_ZONED
3943 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
3944 !f2fs_sb_has_blkzoned(sbi)) {
3945 f2fs_err(sbi, "Zoned block device feature not enabled");
3946 return -EINVAL;
3947 }
3948 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
3949 if (init_blkz_info(sbi, i)) {
3950 f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
3951 return -EINVAL;
3952 }
3953 if (max_devices == 1)
3954 break;
3955 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
3956 i, FDEV(i).path,
3957 FDEV(i).total_segments,
3958 FDEV(i).start_blk, FDEV(i).end_blk,
3959 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
3960 "Host-aware" : "Host-managed");
3961 continue;
3962 }
3963 #endif
3964 f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
3965 i, FDEV(i).path,
3966 FDEV(i).total_segments,
3967 FDEV(i).start_blk, FDEV(i).end_blk);
3968 }
3969 f2fs_info(sbi,
3970 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3971 return 0;
3972 }
3973
f2fs_setup_casefold(struct f2fs_sb_info * sbi)3974 static int f2fs_setup_casefold(struct f2fs_sb_info *sbi)
3975 {
3976 #ifdef CONFIG_UNICODE
3977 if (f2fs_sb_has_casefold(sbi) && !sbi->sb->s_encoding) {
3978 const struct f2fs_sb_encodings *encoding_info;
3979 struct unicode_map *encoding;
3980 __u16 encoding_flags;
3981
3982 if (f2fs_sb_read_encoding(sbi->raw_super, &encoding_info,
3983 &encoding_flags)) {
3984 f2fs_err(sbi,
3985 "Encoding requested by superblock is unknown");
3986 return -EINVAL;
3987 }
3988
3989 encoding = utf8_load(encoding_info->version);
3990 if (IS_ERR(encoding)) {
3991 f2fs_err(sbi,
3992 "can't mount with superblock charset: %s-%s "
3993 "not supported by the kernel. flags: 0x%x.",
3994 encoding_info->name, encoding_info->version,
3995 encoding_flags);
3996 return PTR_ERR(encoding);
3997 }
3998 f2fs_info(sbi, "Using encoding defined by superblock: "
3999 "%s-%s with flags 0x%hx", encoding_info->name,
4000 encoding_info->version?:"\b", encoding_flags);
4001
4002 sbi->sb->s_encoding = encoding;
4003 sbi->sb->s_encoding_flags = encoding_flags;
4004 }
4005 #else
4006 if (f2fs_sb_has_casefold(sbi)) {
4007 f2fs_err(sbi, "Filesystem with casefold feature cannot be mounted without CONFIG_UNICODE");
4008 return -EINVAL;
4009 }
4010 #endif
4011 return 0;
4012 }
4013
f2fs_tuning_parameters(struct f2fs_sb_info * sbi)4014 static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
4015 {
4016 struct f2fs_sm_info *sm_i = SM_I(sbi);
4017
4018 /* adjust parameters according to the volume size */
4019 if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
4020 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
4021 if (f2fs_block_unit_discard(sbi))
4022 sm_i->dcc_info->discard_granularity = 1;
4023 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE |
4024 1 << F2FS_IPU_HONOR_OPU_WRITE;
4025 }
4026
4027 sbi->readdir_ra = 1;
4028 }
4029
f2fs_fill_super(struct super_block * sb,void * data,int silent)4030 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
4031 {
4032 struct f2fs_sb_info *sbi;
4033 struct f2fs_super_block *raw_super;
4034 struct inode *root;
4035 int err;
4036 bool skip_recovery = false, need_fsck = false;
4037 char *options = NULL;
4038 int recovery, i, valid_super_block;
4039 struct curseg_info *seg_i;
4040 int retry_cnt = 1;
4041
4042 try_onemore:
4043 err = -EINVAL;
4044 raw_super = NULL;
4045 valid_super_block = -1;
4046 recovery = 0;
4047
4048 /* allocate memory for f2fs-specific super block info */
4049 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
4050 if (!sbi)
4051 return -ENOMEM;
4052
4053 sbi->sb = sb;
4054
4055 /* Load the checksum driver */
4056 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
4057 if (IS_ERR(sbi->s_chksum_driver)) {
4058 f2fs_err(sbi, "Cannot load crc32 driver.");
4059 err = PTR_ERR(sbi->s_chksum_driver);
4060 sbi->s_chksum_driver = NULL;
4061 goto free_sbi;
4062 }
4063
4064 /* set a block size */
4065 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
4066 f2fs_err(sbi, "unable to set blocksize");
4067 goto free_sbi;
4068 }
4069
4070 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
4071 &recovery);
4072 if (err)
4073 goto free_sbi;
4074
4075 sb->s_fs_info = sbi;
4076 sbi->raw_super = raw_super;
4077
4078 /* precompute checksum seed for metadata */
4079 if (f2fs_sb_has_inode_chksum(sbi))
4080 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
4081 sizeof(raw_super->uuid));
4082
4083 default_options(sbi);
4084 /* parse mount options */
4085 options = kstrdup((const char *)data, GFP_KERNEL);
4086 if (data && !options) {
4087 err = -ENOMEM;
4088 goto free_sb_buf;
4089 }
4090
4091 err = parse_options(sb, options, false);
4092 if (err)
4093 goto free_options;
4094
4095 sb->s_maxbytes = max_file_blocks(NULL) <<
4096 le32_to_cpu(raw_super->log_blocksize);
4097 sb->s_max_links = F2FS_LINK_MAX;
4098
4099 err = f2fs_setup_casefold(sbi);
4100 if (err)
4101 goto free_options;
4102
4103 #ifdef CONFIG_QUOTA
4104 sb->dq_op = &f2fs_quota_operations;
4105 sb->s_qcop = &f2fs_quotactl_ops;
4106 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
4107
4108 if (f2fs_sb_has_quota_ino(sbi)) {
4109 for (i = 0; i < MAXQUOTAS; i++) {
4110 if (f2fs_qf_ino(sbi->sb, i))
4111 sbi->nquota_files++;
4112 }
4113 }
4114 #endif
4115
4116 sb->s_op = &f2fs_sops;
4117 #ifdef CONFIG_FS_ENCRYPTION
4118 sb->s_cop = &f2fs_cryptops;
4119 #endif
4120 #ifdef CONFIG_FS_VERITY
4121 sb->s_vop = &f2fs_verityops;
4122 #endif
4123 sb->s_xattr = f2fs_xattr_handlers;
4124 sb->s_export_op = &f2fs_export_ops;
4125 sb->s_magic = F2FS_SUPER_MAGIC;
4126 sb->s_time_gran = 1;
4127 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
4128 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
4129 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
4130 sb->s_iflags |= SB_I_CGROUPWB;
4131
4132 /* init f2fs-specific super block info */
4133 sbi->valid_super_block = valid_super_block;
4134 init_f2fs_rwsem(&sbi->gc_lock);
4135 mutex_init(&sbi->writepages);
4136 init_f2fs_rwsem(&sbi->cp_global_sem);
4137 init_f2fs_rwsem(&sbi->node_write);
4138 init_f2fs_rwsem(&sbi->node_change);
4139
4140 /* disallow all the data/node/meta page writes */
4141 set_sbi_flag(sbi, SBI_POR_DOING);
4142 spin_lock_init(&sbi->stat_lock);
4143
4144 for (i = 0; i < NR_PAGE_TYPE; i++) {
4145 int n = (i == META) ? 1 : NR_TEMP_TYPE;
4146 int j;
4147
4148 sbi->write_io[i] =
4149 f2fs_kmalloc(sbi,
4150 array_size(n,
4151 sizeof(struct f2fs_bio_info)),
4152 GFP_KERNEL);
4153 if (!sbi->write_io[i]) {
4154 err = -ENOMEM;
4155 goto free_bio_info;
4156 }
4157
4158 for (j = HOT; j < n; j++) {
4159 init_f2fs_rwsem(&sbi->write_io[i][j].io_rwsem);
4160 sbi->write_io[i][j].sbi = sbi;
4161 sbi->write_io[i][j].bio = NULL;
4162 spin_lock_init(&sbi->write_io[i][j].io_lock);
4163 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
4164 INIT_LIST_HEAD(&sbi->write_io[i][j].bio_list);
4165 init_f2fs_rwsem(&sbi->write_io[i][j].bio_list_lock);
4166 }
4167 }
4168
4169 init_f2fs_rwsem(&sbi->cp_rwsem);
4170 init_f2fs_rwsem(&sbi->quota_sem);
4171 init_waitqueue_head(&sbi->cp_wait);
4172 init_sb_info(sbi);
4173
4174 err = f2fs_init_iostat(sbi);
4175 if (err)
4176 goto free_bio_info;
4177
4178 err = init_percpu_info(sbi);
4179 if (err)
4180 goto free_iostat;
4181
4182 if (F2FS_IO_ALIGNED(sbi)) {
4183 sbi->write_io_dummy =
4184 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
4185 if (!sbi->write_io_dummy) {
4186 err = -ENOMEM;
4187 goto free_percpu;
4188 }
4189 }
4190
4191 /* init per sbi slab cache */
4192 err = f2fs_init_xattr_caches(sbi);
4193 if (err)
4194 goto free_io_dummy;
4195 err = f2fs_init_page_array_cache(sbi);
4196 if (err)
4197 goto free_xattr_cache;
4198
4199 /* get an inode for meta space */
4200 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
4201 if (IS_ERR(sbi->meta_inode)) {
4202 f2fs_err(sbi, "Failed to read F2FS meta data inode");
4203 err = PTR_ERR(sbi->meta_inode);
4204 goto free_page_array_cache;
4205 }
4206
4207 err = f2fs_get_valid_checkpoint(sbi);
4208 if (err) {
4209 f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
4210 goto free_meta_inode;
4211 }
4212
4213 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
4214 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
4215 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
4216 set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4217 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
4218 }
4219
4220 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
4221 set_sbi_flag(sbi, SBI_NEED_FSCK);
4222
4223 /* Initialize device list */
4224 err = f2fs_scan_devices(sbi);
4225 if (err) {
4226 f2fs_err(sbi, "Failed to find devices");
4227 goto free_devices;
4228 }
4229
4230 err = f2fs_init_post_read_wq(sbi);
4231 if (err) {
4232 f2fs_err(sbi, "Failed to initialize post read workqueue");
4233 goto free_devices;
4234 }
4235
4236 sbi->total_valid_node_count =
4237 le32_to_cpu(sbi->ckpt->valid_node_count);
4238 percpu_counter_set(&sbi->total_valid_inode_count,
4239 le32_to_cpu(sbi->ckpt->valid_inode_count));
4240 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
4241 sbi->total_valid_block_count =
4242 le64_to_cpu(sbi->ckpt->valid_block_count);
4243 sbi->last_valid_block_count = sbi->total_valid_block_count;
4244 sbi->reserved_blocks = 0;
4245 sbi->current_reserved_blocks = 0;
4246 limit_reserve_root(sbi);
4247 adjust_unusable_cap_perc(sbi);
4248
4249 for (i = 0; i < NR_INODE_TYPE; i++) {
4250 INIT_LIST_HEAD(&sbi->inode_list[i]);
4251 spin_lock_init(&sbi->inode_lock[i]);
4252 }
4253 mutex_init(&sbi->flush_lock);
4254
4255 f2fs_init_extent_cache_info(sbi);
4256
4257 f2fs_init_ino_entry_info(sbi);
4258
4259 f2fs_init_fsync_node_info(sbi);
4260
4261 /* setup checkpoint request control and start checkpoint issue thread */
4262 f2fs_init_ckpt_req_control(sbi);
4263 if (!f2fs_readonly(sb) && !test_opt(sbi, DISABLE_CHECKPOINT) &&
4264 test_opt(sbi, MERGE_CHECKPOINT)) {
4265 err = f2fs_start_ckpt_thread(sbi);
4266 if (err) {
4267 f2fs_err(sbi,
4268 "Failed to start F2FS issue_checkpoint_thread (%d)",
4269 err);
4270 goto stop_ckpt_thread;
4271 }
4272 }
4273
4274 /* setup f2fs internal modules */
4275 err = f2fs_build_segment_manager(sbi);
4276 if (err) {
4277 f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
4278 err);
4279 goto free_sm;
4280 }
4281 err = f2fs_build_node_manager(sbi);
4282 if (err) {
4283 f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
4284 err);
4285 goto free_nm;
4286 }
4287
4288 err = adjust_reserved_segment(sbi);
4289 if (err)
4290 goto free_nm;
4291
4292 /* For write statistics */
4293 sbi->sectors_written_start = f2fs_get_sectors_written(sbi);
4294
4295 /* Read accumulated write IO statistics if exists */
4296 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
4297 if (__exist_node_summaries(sbi))
4298 sbi->kbytes_written =
4299 le64_to_cpu(seg_i->journal->info.kbytes_written);
4300
4301 f2fs_build_gc_manager(sbi);
4302
4303 err = f2fs_build_stats(sbi);
4304 if (err)
4305 goto free_nm;
4306
4307 /* get an inode for node space */
4308 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
4309 if (IS_ERR(sbi->node_inode)) {
4310 f2fs_err(sbi, "Failed to read node inode");
4311 err = PTR_ERR(sbi->node_inode);
4312 goto free_stats;
4313 }
4314
4315 /* read root inode and dentry */
4316 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
4317 if (IS_ERR(root)) {
4318 f2fs_err(sbi, "Failed to read root inode");
4319 err = PTR_ERR(root);
4320 goto free_node_inode;
4321 }
4322 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
4323 !root->i_size || !root->i_nlink) {
4324 iput(root);
4325 err = -EINVAL;
4326 goto free_node_inode;
4327 }
4328
4329 sb->s_root = d_make_root(root); /* allocate root dentry */
4330 if (!sb->s_root) {
4331 err = -ENOMEM;
4332 goto free_node_inode;
4333 }
4334
4335 err = f2fs_init_compress_inode(sbi);
4336 if (err)
4337 goto free_root_inode;
4338
4339 err = f2fs_register_sysfs(sbi);
4340 if (err)
4341 goto free_compress_inode;
4342
4343 #ifdef CONFIG_QUOTA
4344 /* Enable quota usage during mount */
4345 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
4346 err = f2fs_enable_quotas(sb);
4347 if (err)
4348 f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
4349 }
4350 #endif
4351 /* if there are any orphan inodes, free them */
4352 err = f2fs_recover_orphan_inodes(sbi);
4353 if (err)
4354 goto free_meta;
4355
4356 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
4357 goto reset_checkpoint;
4358
4359 /* recover fsynced data */
4360 if (!test_opt(sbi, DISABLE_ROLL_FORWARD) &&
4361 !test_opt(sbi, NORECOVERY)) {
4362 /*
4363 * mount should be failed, when device has readonly mode, and
4364 * previous checkpoint was not done by clean system shutdown.
4365 */
4366 if (f2fs_hw_is_readonly(sbi)) {
4367 if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4368 err = f2fs_recover_fsync_data(sbi, true);
4369 if (err > 0) {
4370 err = -EROFS;
4371 f2fs_err(sbi, "Need to recover fsync data, but "
4372 "write access unavailable, please try "
4373 "mount w/ disable_roll_forward or norecovery");
4374 }
4375 if (err < 0)
4376 goto free_meta;
4377 }
4378 f2fs_info(sbi, "write access unavailable, skipping recovery");
4379 goto reset_checkpoint;
4380 }
4381
4382 if (need_fsck)
4383 set_sbi_flag(sbi, SBI_NEED_FSCK);
4384
4385 if (skip_recovery)
4386 goto reset_checkpoint;
4387
4388 err = f2fs_recover_fsync_data(sbi, false);
4389 if (err < 0) {
4390 if (err != -ENOMEM)
4391 skip_recovery = true;
4392 need_fsck = true;
4393 f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
4394 err);
4395 goto free_meta;
4396 }
4397 } else {
4398 err = f2fs_recover_fsync_data(sbi, true);
4399
4400 if (!f2fs_readonly(sb) && err > 0) {
4401 err = -EINVAL;
4402 f2fs_err(sbi, "Need to recover fsync data");
4403 goto free_meta;
4404 }
4405 }
4406
4407 /*
4408 * If the f2fs is not readonly and fsync data recovery succeeds,
4409 * check zoned block devices' write pointer consistency.
4410 */
4411 if (!err && !f2fs_readonly(sb) && f2fs_sb_has_blkzoned(sbi)) {
4412 err = f2fs_check_write_pointer(sbi);
4413 if (err)
4414 goto free_meta;
4415 }
4416
4417 reset_checkpoint:
4418 f2fs_init_inmem_curseg(sbi);
4419
4420 /* f2fs_recover_fsync_data() cleared this already */
4421 clear_sbi_flag(sbi, SBI_POR_DOING);
4422
4423 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
4424 err = f2fs_disable_checkpoint(sbi);
4425 if (err)
4426 goto sync_free_meta;
4427 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
4428 f2fs_enable_checkpoint(sbi);
4429 }
4430
4431 /*
4432 * If filesystem is not mounted as read-only then
4433 * do start the gc_thread.
4434 */
4435 if ((F2FS_OPTION(sbi).bggc_mode != BGGC_MODE_OFF ||
4436 test_opt(sbi, GC_MERGE)) && !f2fs_readonly(sb)) {
4437 /* After POR, we can run background GC thread.*/
4438 err = f2fs_start_gc_thread(sbi);
4439 if (err)
4440 goto sync_free_meta;
4441 }
4442 kvfree(options);
4443
4444 /* recover broken superblock */
4445 if (recovery) {
4446 err = f2fs_commit_super(sbi, true);
4447 f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
4448 sbi->valid_super_block ? 1 : 2, err);
4449 }
4450
4451 f2fs_join_shrinker(sbi);
4452
4453 f2fs_tuning_parameters(sbi);
4454
4455 f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
4456 cur_cp_version(F2FS_CKPT(sbi)));
4457 f2fs_update_time(sbi, CP_TIME);
4458 f2fs_update_time(sbi, REQ_TIME);
4459 clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
4460 return 0;
4461
4462 sync_free_meta:
4463 /* safe to flush all the data */
4464 sync_filesystem(sbi->sb);
4465 retry_cnt = 0;
4466
4467 free_meta:
4468 #ifdef CONFIG_QUOTA
4469 f2fs_truncate_quota_inode_pages(sb);
4470 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
4471 f2fs_quota_off_umount(sbi->sb);
4472 #endif
4473 /*
4474 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4475 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4476 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
4477 * falls into an infinite loop in f2fs_sync_meta_pages().
4478 */
4479 truncate_inode_pages_final(META_MAPPING(sbi));
4480 /* evict some inodes being cached by GC */
4481 evict_inodes(sb);
4482 f2fs_unregister_sysfs(sbi);
4483 free_compress_inode:
4484 f2fs_destroy_compress_inode(sbi);
4485 free_root_inode:
4486 dput(sb->s_root);
4487 sb->s_root = NULL;
4488 free_node_inode:
4489 f2fs_release_ino_entry(sbi, true);
4490 truncate_inode_pages_final(NODE_MAPPING(sbi));
4491 iput(sbi->node_inode);
4492 sbi->node_inode = NULL;
4493 free_stats:
4494 f2fs_destroy_stats(sbi);
4495 free_nm:
4496 /* stop discard thread before destroying node manager */
4497 f2fs_stop_discard_thread(sbi);
4498 f2fs_destroy_node_manager(sbi);
4499 free_sm:
4500 f2fs_destroy_segment_manager(sbi);
4501 f2fs_destroy_post_read_wq(sbi);
4502 stop_ckpt_thread:
4503 f2fs_stop_ckpt_thread(sbi);
4504 free_devices:
4505 destroy_device_list(sbi);
4506 kvfree(sbi->ckpt);
4507 free_meta_inode:
4508 make_bad_inode(sbi->meta_inode);
4509 iput(sbi->meta_inode);
4510 sbi->meta_inode = NULL;
4511 free_page_array_cache:
4512 f2fs_destroy_page_array_cache(sbi);
4513 free_xattr_cache:
4514 f2fs_destroy_xattr_caches(sbi);
4515 free_io_dummy:
4516 mempool_destroy(sbi->write_io_dummy);
4517 free_percpu:
4518 destroy_percpu_info(sbi);
4519 free_iostat:
4520 f2fs_destroy_iostat(sbi);
4521 free_bio_info:
4522 for (i = 0; i < NR_PAGE_TYPE; i++)
4523 kvfree(sbi->write_io[i]);
4524
4525 #ifdef CONFIG_UNICODE
4526 utf8_unload(sb->s_encoding);
4527 sb->s_encoding = NULL;
4528 #endif
4529 free_options:
4530 #ifdef CONFIG_QUOTA
4531 for (i = 0; i < MAXQUOTAS; i++)
4532 kfree(F2FS_OPTION(sbi).s_qf_names[i]);
4533 #endif
4534 fscrypt_free_dummy_policy(&F2FS_OPTION(sbi).dummy_enc_policy);
4535 kvfree(options);
4536 free_sb_buf:
4537 kfree(raw_super);
4538 free_sbi:
4539 if (sbi->s_chksum_driver)
4540 crypto_free_shash(sbi->s_chksum_driver);
4541 kfree(sbi);
4542
4543 /* give only one another chance */
4544 if (retry_cnt > 0 && skip_recovery) {
4545 retry_cnt--;
4546 shrink_dcache_sb(sb);
4547 goto try_onemore;
4548 }
4549 return err;
4550 }
4551
f2fs_mount(struct file_system_type * fs_type,int flags,const char * dev_name,void * data)4552 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
4553 const char *dev_name, void *data)
4554 {
4555 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
4556 }
4557
kill_f2fs_super(struct super_block * sb)4558 static void kill_f2fs_super(struct super_block *sb)
4559 {
4560 if (sb->s_root) {
4561 struct f2fs_sb_info *sbi = F2FS_SB(sb);
4562
4563 set_sbi_flag(sbi, SBI_IS_CLOSE);
4564 f2fs_stop_gc_thread(sbi);
4565 f2fs_stop_discard_thread(sbi);
4566
4567 #ifdef CONFIG_F2FS_FS_COMPRESSION
4568 /*
4569 * latter evict_inode() can bypass checking and invalidating
4570 * compress inode cache.
4571 */
4572 if (test_opt(sbi, COMPRESS_CACHE))
4573 truncate_inode_pages_final(COMPRESS_MAPPING(sbi));
4574 #endif
4575
4576 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
4577 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
4578 struct cp_control cpc = {
4579 .reason = CP_UMOUNT,
4580 };
4581 f2fs_write_checkpoint(sbi, &cpc);
4582 }
4583
4584 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
4585 sb->s_flags &= ~SB_RDONLY;
4586 }
4587 kill_block_super(sb);
4588 }
4589
4590 static struct file_system_type f2fs_fs_type = {
4591 .owner = THIS_MODULE,
4592 .name = "f2fs",
4593 .mount = f2fs_mount,
4594 .kill_sb = kill_f2fs_super,
4595 .fs_flags = FS_REQUIRES_DEV,
4596 };
4597 MODULE_ALIAS_FS("f2fs");
4598
init_inodecache(void)4599 static int __init init_inodecache(void)
4600 {
4601 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
4602 sizeof(struct f2fs_inode_info), 0,
4603 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
4604 if (!f2fs_inode_cachep)
4605 return -ENOMEM;
4606 return 0;
4607 }
4608
destroy_inodecache(void)4609 static void destroy_inodecache(void)
4610 {
4611 /*
4612 * Make sure all delayed rcu free inodes are flushed before we
4613 * destroy cache.
4614 */
4615 rcu_barrier();
4616 kmem_cache_destroy(f2fs_inode_cachep);
4617 }
4618
init_f2fs_fs(void)4619 static int __init init_f2fs_fs(void)
4620 {
4621 int err;
4622
4623 if (PAGE_SIZE != F2FS_BLKSIZE) {
4624 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
4625 PAGE_SIZE, F2FS_BLKSIZE);
4626 return -EINVAL;
4627 }
4628
4629 err = init_inodecache();
4630 if (err)
4631 goto fail;
4632 err = f2fs_create_node_manager_caches();
4633 if (err)
4634 goto free_inodecache;
4635 err = f2fs_create_segment_manager_caches();
4636 if (err)
4637 goto free_node_manager_caches;
4638 err = f2fs_create_checkpoint_caches();
4639 if (err)
4640 goto free_segment_manager_caches;
4641 err = f2fs_create_recovery_cache();
4642 if (err)
4643 goto free_checkpoint_caches;
4644 err = f2fs_create_extent_cache();
4645 if (err)
4646 goto free_recovery_cache;
4647 err = f2fs_create_garbage_collection_cache();
4648 if (err)
4649 goto free_extent_cache;
4650 err = f2fs_init_sysfs();
4651 if (err)
4652 goto free_garbage_collection_cache;
4653 err = register_shrinker(&f2fs_shrinker_info);
4654 if (err)
4655 goto free_sysfs;
4656 err = register_filesystem(&f2fs_fs_type);
4657 if (err)
4658 goto free_shrinker;
4659 f2fs_create_root_stats();
4660 err = f2fs_init_post_read_processing();
4661 if (err)
4662 goto free_root_stats;
4663 err = f2fs_init_iostat_processing();
4664 if (err)
4665 goto free_post_read;
4666 err = f2fs_init_bio_entry_cache();
4667 if (err)
4668 goto free_iostat;
4669 err = f2fs_init_bioset();
4670 if (err)
4671 goto free_bio_enrty_cache;
4672 err = f2fs_init_compress_mempool();
4673 if (err)
4674 goto free_bioset;
4675 err = f2fs_init_compress_cache();
4676 if (err)
4677 goto free_compress_mempool;
4678 err = f2fs_create_casefold_cache();
4679 if (err)
4680 goto free_compress_cache;
4681 return 0;
4682 free_compress_cache:
4683 f2fs_destroy_compress_cache();
4684 free_compress_mempool:
4685 f2fs_destroy_compress_mempool();
4686 free_bioset:
4687 f2fs_destroy_bioset();
4688 free_bio_enrty_cache:
4689 f2fs_destroy_bio_entry_cache();
4690 free_iostat:
4691 f2fs_destroy_iostat_processing();
4692 free_post_read:
4693 f2fs_destroy_post_read_processing();
4694 free_root_stats:
4695 f2fs_destroy_root_stats();
4696 unregister_filesystem(&f2fs_fs_type);
4697 free_shrinker:
4698 unregister_shrinker(&f2fs_shrinker_info);
4699 free_sysfs:
4700 f2fs_exit_sysfs();
4701 free_garbage_collection_cache:
4702 f2fs_destroy_garbage_collection_cache();
4703 free_extent_cache:
4704 f2fs_destroy_extent_cache();
4705 free_recovery_cache:
4706 f2fs_destroy_recovery_cache();
4707 free_checkpoint_caches:
4708 f2fs_destroy_checkpoint_caches();
4709 free_segment_manager_caches:
4710 f2fs_destroy_segment_manager_caches();
4711 free_node_manager_caches:
4712 f2fs_destroy_node_manager_caches();
4713 free_inodecache:
4714 destroy_inodecache();
4715 fail:
4716 return err;
4717 }
4718
exit_f2fs_fs(void)4719 static void __exit exit_f2fs_fs(void)
4720 {
4721 f2fs_destroy_casefold_cache();
4722 f2fs_destroy_compress_cache();
4723 f2fs_destroy_compress_mempool();
4724 f2fs_destroy_bioset();
4725 f2fs_destroy_bio_entry_cache();
4726 f2fs_destroy_iostat_processing();
4727 f2fs_destroy_post_read_processing();
4728 f2fs_destroy_root_stats();
4729 unregister_filesystem(&f2fs_fs_type);
4730 unregister_shrinker(&f2fs_shrinker_info);
4731 f2fs_exit_sysfs();
4732 f2fs_destroy_garbage_collection_cache();
4733 f2fs_destroy_extent_cache();
4734 f2fs_destroy_recovery_cache();
4735 f2fs_destroy_checkpoint_caches();
4736 f2fs_destroy_segment_manager_caches();
4737 f2fs_destroy_node_manager_caches();
4738 destroy_inodecache();
4739 }
4740
4741 module_init(init_f2fs_fs)
4742 module_exit(exit_f2fs_fs)
4743
4744 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
4745 MODULE_DESCRIPTION("Flash Friendly File System");
4746 MODULE_LICENSE("GPL");
4747 MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
4748 MODULE_SOFTDEP("pre: crc32");
4749
4750