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fscrypt: remove filesystem specific build config option
[mirror_ubuntu-jammy-kernel.git] / fs / f2fs / super.c
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7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
aff063e2
JK		 3 * fs/f2fs/super.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
aff063e2
JK		 7 */
8#include <linux/module.h>
9#include <linux/init.h>
10#include <linux/fs.h>
11#include <linux/statfs.h>
aff063e2
JK		 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>
5e176d54 18#include <linux/proc_fs.h>
aff063e2
JK		 19#include <linux/random.h>
20#include <linux/exportfs.h>
d3ee456d 21#include <linux/blkdev.h>
0abd675e 22#include <linux/quotaops.h>
aff063e2 23#include <linux/f2fs_fs.h>
b59d0bae 24#include <linux/sysfs.h>
4b2414d0 25#include <linux/quota.h>
aff063e2
JK		 26
27#include "f2fs.h"
28#include "node.h"
5ec4e49f 29#include "segment.h"
aff063e2 30#include "xattr.h"
b59d0bae 31#include "gc.h"
db9f7c1a 32#include "trace.h"
aff063e2 33
a2a4a7e4
NJ		 34#define CREATE_TRACE_POINTS
35#include <trace/events/f2fs.h>
36
aff063e2
JK		 37static struct kmem_cache *f2fs_inode_cachep;
38
73faec4d 39#ifdef CONFIG_F2FS_FAULT_INJECTION
2c63fead 40
19880e6e 41const char *f2fs_fault_name[FAULT_MAX] = {
2c63fead 42 [FAULT_KMALLOC] = "kmalloc",
628b3d14 43 [FAULT_KVMALLOC] = "kvmalloc",
c41f3cc3 44 [FAULT_PAGE_ALLOC] = "page alloc",
01eccef7 45 [FAULT_PAGE_GET] = "page get",
d62fe971 46 [FAULT_ALLOC_BIO] = "alloc bio",
cb78942b
JK		 47 [FAULT_ALLOC_NID] = "alloc nid",
48 [FAULT_ORPHAN] = "orphan",
49 [FAULT_BLOCK] = "no more block",
50 [FAULT_DIR_DEPTH] = "too big dir depth",
53aa6bbf 51 [FAULT_EVICT_INODE] = "evict_inode fail",
14b44d23 52 [FAULT_TRUNCATE] = "truncate fail",
6f5c2ed0 53 [FAULT_READ_IO] = "read IO error",
0f348028 54 [FAULT_CHECKPOINT] = "checkpoint error",
b83dcfe6 55 [FAULT_DISCARD] = "discard error",
6f5c2ed0 56 [FAULT_WRITE_IO] = "write IO error",
2c63fead 57};
08796897 58
d494500a
CY		 59void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
60 unsigned int type)
08796897 61{
63189b78 62 struct f2fs_fault_info *ffi = &F2FS_OPTION(sbi).fault_info;
1ecc0c5c 63
08796897 64 if (rate) {
1ecc0c5c
CY		 65 atomic_set(&ffi->inject_ops, 0);
66 ffi->inject_rate = rate;
08796897 67 }
d494500a
CY		 68
69 if (type)
70 ffi->inject_type = type;
71
72 if (!rate && !type)
73 memset(ffi, 0, sizeof(struct f2fs_fault_info));
08796897 74}
73faec4d
JK		 75#endif
76
2658e50d
JK		 77/* f2fs-wide shrinker description */
78static struct shrinker f2fs_shrinker_info = {
79 .scan_objects = f2fs_shrink_scan,
80 .count_objects = f2fs_shrink_count,
81 .seeks = DEFAULT_SEEKS,
82};
83
aff063e2 84enum {
696c018c 85 Opt_gc_background,
aff063e2 86 Opt_disable_roll_forward,
2d834bf9 87 Opt_norecovery,
aff063e2 88 Opt_discard,
64058be9 89 Opt_nodiscard,
aff063e2 90 Opt_noheap,
7a20b8a6 91 Opt_heap,
4058c511 92 Opt_user_xattr,
aff063e2 93 Opt_nouser_xattr,
4058c511 94 Opt_acl,
aff063e2
JK		 95 Opt_noacl,
96 Opt_active_logs,
97 Opt_disable_ext_identify,
444c580f 98 Opt_inline_xattr,
23cf7212 99 Opt_noinline_xattr,
6afc662e 100 Opt_inline_xattr_size,
8274de77 101 Opt_inline_data,
5efd3c6f 102 Opt_inline_dentry,
97c1794a 103 Opt_noinline_dentry,
6b4afdd7 104 Opt_flush_merge,
69e9e427 105 Opt_noflush_merge,
0f7b2abd 106 Opt_nobarrier,
d5053a34 107 Opt_fastboot,
89672159 108 Opt_extent_cache,
7daaea25 109 Opt_noextent_cache,
75342797 110 Opt_noinline_data,
343f40f0 111 Opt_data_flush,
7e65be49 112 Opt_reserve_root,
7c2e5963
JK		 113 Opt_resgid,
114 Opt_resuid,
36abef4e 115 Opt_mode,
ec91538d 116 Opt_io_size_bits,
73faec4d 117 Opt_fault_injection,
d494500a 118 Opt_fault_type,
6d94c74a
JK		 119 Opt_lazytime,
120 Opt_nolazytime,
4b2414d0
CY		 121 Opt_quota,
122 Opt_noquota,
0abd675e
CY		 123 Opt_usrquota,
124 Opt_grpquota,
5c57132e 125 Opt_prjquota,
4b2414d0
CY		 126 Opt_usrjquota,
127 Opt_grpjquota,
128 Opt_prjjquota,
129 Opt_offusrjquota,
130 Opt_offgrpjquota,
131 Opt_offprjjquota,
132 Opt_jqfmt_vfsold,
133 Opt_jqfmt_vfsv0,
134 Opt_jqfmt_vfsv1,
0cdd3195 135 Opt_whint,
07939627 136 Opt_alloc,
93cf93f1 137 Opt_fsync,
ff62af20 138 Opt_test_dummy_encryption,
4354994f 139 Opt_checkpoint,
aff063e2
JK		 140 Opt_err,
141};
142
143static match_table_t f2fs_tokens = {
696c018c 144 {Opt_gc_background, "background_gc=%s"},
aff063e2 145 {Opt_disable_roll_forward, "disable_roll_forward"},
2d834bf9 146 {Opt_norecovery, "norecovery"},
aff063e2 147 {Opt_discard, "discard"},
64058be9 148 {Opt_nodiscard, "nodiscard"},
aff063e2 149 {Opt_noheap, "no_heap"},
7a20b8a6 150 {Opt_heap, "heap"},
4058c511 151 {Opt_user_xattr, "user_xattr"},
aff063e2 152 {Opt_nouser_xattr, "nouser_xattr"},
4058c511 153 {Opt_acl, "acl"},
aff063e2
JK		 154 {Opt_noacl, "noacl"},
155 {Opt_active_logs, "active_logs=%u"},
156 {Opt_disable_ext_identify, "disable_ext_identify"},
444c580f 157 {Opt_inline_xattr, "inline_xattr"},
23cf7212 158 {Opt_noinline_xattr, "noinline_xattr"},
6afc662e 159 {Opt_inline_xattr_size, "inline_xattr_size=%u"},
8274de77 160 {Opt_inline_data, "inline_data"},
5efd3c6f 161 {Opt_inline_dentry, "inline_dentry"},
97c1794a 162 {Opt_noinline_dentry, "noinline_dentry"},
6b4afdd7 163 {Opt_flush_merge, "flush_merge"},
69e9e427 164 {Opt_noflush_merge, "noflush_merge"},
0f7b2abd 165 {Opt_nobarrier, "nobarrier"},
d5053a34 166 {Opt_fastboot, "fastboot"},
89672159 167 {Opt_extent_cache, "extent_cache"},
7daaea25 168 {Opt_noextent_cache, "noextent_cache"},
75342797 169 {Opt_noinline_data, "noinline_data"},
343f40f0 170 {Opt_data_flush, "data_flush"},
7e65be49 171 {Opt_reserve_root, "reserve_root=%u"},
7c2e5963
JK		 172 {Opt_resgid, "resgid=%u"},
173 {Opt_resuid, "resuid=%u"},
36abef4e 174 {Opt_mode, "mode=%s"},
ec91538d 175 {Opt_io_size_bits, "io_bits=%u"},
73faec4d 176 {Opt_fault_injection, "fault_injection=%u"},
d494500a 177 {Opt_fault_type, "fault_type=%u"},
6d94c74a
JK		 178 {Opt_lazytime, "lazytime"},
179 {Opt_nolazytime, "nolazytime"},
4b2414d0
CY		 180 {Opt_quota, "quota"},
181 {Opt_noquota, "noquota"},
0abd675e
CY		 182 {Opt_usrquota, "usrquota"},
183 {Opt_grpquota, "grpquota"},
5c57132e 184 {Opt_prjquota, "prjquota"},
4b2414d0
CY		 185 {Opt_usrjquota, "usrjquota=%s"},
186 {Opt_grpjquota, "grpjquota=%s"},
187 {Opt_prjjquota, "prjjquota=%s"},
188 {Opt_offusrjquota, "usrjquota="},
189 {Opt_offgrpjquota, "grpjquota="},
190 {Opt_offprjjquota, "prjjquota="},
191 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
192 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
193 {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
0cdd3195 194 {Opt_whint, "whint_mode=%s"},
07939627 195 {Opt_alloc, "alloc_mode=%s"},
93cf93f1 196 {Opt_fsync, "fsync_mode=%s"},
ff62af20 197 {Opt_test_dummy_encryption, "test_dummy_encryption"},
4354994f 198 {Opt_checkpoint, "checkpoint=%s"},
aff063e2
JK		 199 {Opt_err, NULL},
200};
201
a07ef784
NJ		 202void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
203{
204 struct va_format vaf;
205 va_list args;
206
207 va_start(args, fmt);
208 vaf.fmt = fmt;
209 vaf.va = &args;
22d7ea13 210 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
a07ef784
NJ		 211 va_end(args);
212}
213
7e65be49
JK		 214static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
215{
216 block_t limit = (sbi->user_block_count << 1) / 1000;
217
218 /* limit is 0.2% */
63189b78
CY		 219 if (test_opt(sbi, RESERVE_ROOT) &&
220 F2FS_OPTION(sbi).root_reserved_blocks > limit) {
221 F2FS_OPTION(sbi).root_reserved_blocks = limit;
7e65be49
JK		 222 f2fs_msg(sbi->sb, KERN_INFO,
223 "Reduce reserved blocks for root = %u",
63189b78 224 F2FS_OPTION(sbi).root_reserved_blocks);
7e65be49 225 }
7c2e5963 226 if (!test_opt(sbi, RESERVE_ROOT) &&
63189b78 227 (!uid_eq(F2FS_OPTION(sbi).s_resuid,
7c2e5963 228 make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
63189b78 229 !gid_eq(F2FS_OPTION(sbi).s_resgid,
7c2e5963
JK		 230 make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
231 f2fs_msg(sbi->sb, KERN_INFO,
232 "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
63189b78
CY		 233 from_kuid_munged(&init_user_ns,
234 F2FS_OPTION(sbi).s_resuid),
235 from_kgid_munged(&init_user_ns,
236 F2FS_OPTION(sbi).s_resgid));
7e65be49
JK		 237}
238
aff063e2
JK		 239static void init_once(void *foo)
240{
241 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
242
aff063e2
JK		 243 inode_init_once(&fi->vfs_inode);
244}
245
4b2414d0
CY		 246#ifdef CONFIG_QUOTA
247static const char * const quotatypes[] = INITQFNAMES;
248#define QTYPE2NAME(t) (quotatypes[t])
249static int f2fs_set_qf_name(struct super_block *sb, int qtype,
250 substring_t *args)
251{
252 struct f2fs_sb_info *sbi = F2FS_SB(sb);
253 char *qname;
254 int ret = -EINVAL;
255
63189b78 256 if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
4b2414d0
CY		 257 f2fs_msg(sb, KERN_ERR,
258 "Cannot change journaled "
259 "quota options when quota turned on");
260 return -EINVAL;
261 }
7beb01f7 262 if (f2fs_sb_has_quota_ino(sbi)) {
ea676733
JK		 263 f2fs_msg(sb, KERN_INFO,
264 "QUOTA feature is enabled, so ignore qf_name");
265 return 0;
266 }
267
4b2414d0
CY		 268 qname = match_strdup(args);
269 if (!qname) {
270 f2fs_msg(sb, KERN_ERR,
271 "Not enough memory for storing quotafile name");
272 return -EINVAL;
273 }
63189b78
CY		 274 if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
275 if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
4b2414d0
CY		 276 ret = 0;
277 else
278 f2fs_msg(sb, KERN_ERR,
279 "%s quota file already specified",
280 QTYPE2NAME(qtype));
281 goto errout;
282 }
283 if (strchr(qname, '/')) {
284 f2fs_msg(sb, KERN_ERR,
285 "quotafile must be on filesystem root");
286 goto errout;
287 }
63189b78 288 F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
4b2414d0
CY		 289 set_opt(sbi, QUOTA);
290 return 0;
291errout:
5222595d 292 kvfree(qname);
4b2414d0
CY		 293 return ret;
294}
295
296static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
297{
298 struct f2fs_sb_info *sbi = F2FS_SB(sb);
299
63189b78 300 if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
4b2414d0
CY		 301 f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
302 " when quota turned on");
303 return -EINVAL;
304 }
5222595d 305 kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
63189b78 306 F2FS_OPTION(sbi).s_qf_names[qtype] = NULL;
4b2414d0
CY		 307 return 0;
308}
309
310static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
311{
312 /*
313 * We do the test below only for project quotas. 'usrquota' and
314 * 'grpquota' mount options are allowed even without quota feature
315 * to support legacy quotas in quota files.
316 */
7beb01f7 317 if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
4b2414d0
CY		 318 f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
319 "Cannot enable project quota enforcement.");
320 return -1;
321 }
63189b78
CY		 322 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
323 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
324 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
325 if (test_opt(sbi, USRQUOTA) &&
326 F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
4b2414d0
CY		 327 clear_opt(sbi, USRQUOTA);
328
63189b78
CY		 329 if (test_opt(sbi, GRPQUOTA) &&
330 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
4b2414d0
CY		 331 clear_opt(sbi, GRPQUOTA);
332
63189b78
CY		 333 if (test_opt(sbi, PRJQUOTA) &&
334 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
4b2414d0
CY		 335 clear_opt(sbi, PRJQUOTA);
336
337 if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
338 test_opt(sbi, PRJQUOTA)) {
339 f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
340 "format mixing");
341 return -1;
342 }
343
63189b78 344 if (!F2FS_OPTION(sbi).s_jquota_fmt) {
4b2414d0
CY		 345 f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
346 "not specified");
347 return -1;
348 }
349 }
ea676733 350
7beb01f7 351 if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
ea676733
JK		 352 f2fs_msg(sbi->sb, KERN_INFO,
353 "QUOTA feature is enabled, so ignore jquota_fmt");
63189b78 354 F2FS_OPTION(sbi).s_jquota_fmt = 0;
ea676733 355 }
4b2414d0
CY		 356 return 0;
357}
358#endif
359
696c018c
NJ		 360static int parse_options(struct super_block *sb, char *options)
361{
362 struct f2fs_sb_info *sbi = F2FS_SB(sb);
363 substring_t args[MAX_OPT_ARGS];
364 char *p, *name;
365 int arg = 0;
7c2e5963
JK		 366 kuid_t uid;
367 kgid_t gid;
4b2414d0
CY		 368#ifdef CONFIG_QUOTA
369 int ret;
370#endif
696c018c
NJ		 371
372 if (!options)
373 return 0;
374
375 while ((p = strsep(&options, ",")) != NULL) {
376 int token;
377 if (!*p)
378 continue;
379 /*
380 * Initialize args struct so we know whether arg was
381 * found; some options take optional arguments.
382 */
383 args[0].to = args[0].from = NULL;
384 token = match_token(p, f2fs_tokens, args);
385
386 switch (token) {
387 case Opt_gc_background:
388 name = match_strdup(&args[0]);
389
390 if (!name)
391 return -ENOMEM;
6aefd93b 392 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
696c018c 393 set_opt(sbi, BG_GC);
6aefd93b
JK		 394 clear_opt(sbi, FORCE_FG_GC);
395 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
696c018c 396 clear_opt(sbi, BG_GC);
6aefd93b
JK		 397 clear_opt(sbi, FORCE_FG_GC);
398 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
399 set_opt(sbi, BG_GC);
400 set_opt(sbi, FORCE_FG_GC);
401 } else {
5222595d 402 kvfree(name);
696c018c
NJ		 403 return -EINVAL;
404 }
5222595d 405 kvfree(name);
696c018c
NJ		 406 break;
407 case Opt_disable_roll_forward:
408 set_opt(sbi, DISABLE_ROLL_FORWARD);
409 break;
2d834bf9
JK		 410 case Opt_norecovery:
411 /* this option mounts f2fs with ro */
412 set_opt(sbi, DISABLE_ROLL_FORWARD);
413 if (!f2fs_readonly(sb))
414 return -EINVAL;
415 break;
696c018c 416 case Opt_discard:
7d20c8ab 417 set_opt(sbi, DISCARD);
696c018c 418 break;
64058be9 419 case Opt_nodiscard:
7beb01f7 420 if (f2fs_sb_has_blkzoned(sbi)) {
96ba2dec
DLM		 421 f2fs_msg(sb, KERN_WARNING,
422 "discard is required for zoned block devices");
423 return -EINVAL;
424 }
64058be9 425 clear_opt(sbi, DISCARD);
487df616 426 break;
696c018c
NJ		 427 case Opt_noheap:
428 set_opt(sbi, NOHEAP);
429 break;
7a20b8a6
JK		 430 case Opt_heap:
431 clear_opt(sbi, NOHEAP);
432 break;
696c018c 433#ifdef CONFIG_F2FS_FS_XATTR
4058c511
KA		 434 case Opt_user_xattr:
435 set_opt(sbi, XATTR_USER);
436 break;
696c018c
NJ		 437 case Opt_nouser_xattr:
438 clear_opt(sbi, XATTR_USER);
439 break;
444c580f
JK		 440 case Opt_inline_xattr:
441 set_opt(sbi, INLINE_XATTR);
442 break;
23cf7212
CY		 443 case Opt_noinline_xattr:
444 clear_opt(sbi, INLINE_XATTR);
445 break;
6afc662e
CY		 446 case Opt_inline_xattr_size:
447 if (args->from && match_int(args, &arg))
448 return -EINVAL;
449 set_opt(sbi, INLINE_XATTR_SIZE);
63189b78 450 F2FS_OPTION(sbi).inline_xattr_size = arg;
6afc662e 451 break;
696c018c 452#else
4058c511
KA		 453 case Opt_user_xattr:
454 f2fs_msg(sb, KERN_INFO,
455 "user_xattr options not supported");
456 break;
696c018c
NJ		 457 case Opt_nouser_xattr:
458 f2fs_msg(sb, KERN_INFO,
459 "nouser_xattr options not supported");
460 break;
444c580f
JK		 461 case Opt_inline_xattr:
462 f2fs_msg(sb, KERN_INFO,
463 "inline_xattr options not supported");
464 break;
23cf7212
CY		 465 case Opt_noinline_xattr:
466 f2fs_msg(sb, KERN_INFO,
467 "noinline_xattr options not supported");
468 break;
696c018c
NJ		 469#endif
470#ifdef CONFIG_F2FS_FS_POSIX_ACL
4058c511
KA		 471 case Opt_acl:
472 set_opt(sbi, POSIX_ACL);
473 break;
696c018c
NJ		 474 case Opt_noacl:
475 clear_opt(sbi, POSIX_ACL);
476 break;
477#else
4058c511
KA		 478 case Opt_acl:
479 f2fs_msg(sb, KERN_INFO, "acl options not supported");
480 break;
696c018c
NJ		 481 case Opt_noacl:
482 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
483 break;
484#endif
485 case Opt_active_logs:
486 if (args->from && match_int(args, &arg))
487 return -EINVAL;
488 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
489 return -EINVAL;
63189b78 490 F2FS_OPTION(sbi).active_logs = arg;
696c018c
NJ		 491 break;
492 case Opt_disable_ext_identify:
493 set_opt(sbi, DISABLE_EXT_IDENTIFY);
494 break;
8274de77
HL		 495 case Opt_inline_data:
496 set_opt(sbi, INLINE_DATA);
497 break;
5efd3c6f
CY		 498 case Opt_inline_dentry:
499 set_opt(sbi, INLINE_DENTRY);
500 break;
97c1794a
CY		 501 case Opt_noinline_dentry:
502 clear_opt(sbi, INLINE_DENTRY);
503 break;
6b4afdd7
JK		 504 case Opt_flush_merge:
505 set_opt(sbi, FLUSH_MERGE);
506 break;
69e9e427
JK		 507 case Opt_noflush_merge:
508 clear_opt(sbi, FLUSH_MERGE);
509 break;
0f7b2abd
JK		 510 case Opt_nobarrier:
511 set_opt(sbi, NOBARRIER);
512 break;
d5053a34
JK		 513 case Opt_fastboot:
514 set_opt(sbi, FASTBOOT);
515 break;
89672159
CY		 516 case Opt_extent_cache:
517 set_opt(sbi, EXTENT_CACHE);
518 break;
7daaea25
JK		 519 case Opt_noextent_cache:
520 clear_opt(sbi, EXTENT_CACHE);
521 break;
75342797
WL		 522 case Opt_noinline_data:
523 clear_opt(sbi, INLINE_DATA);
524 break;
343f40f0
CY		 525 case Opt_data_flush:
526 set_opt(sbi, DATA_FLUSH);
527 break;
7e65be49
JK		 528 case Opt_reserve_root:
529 if (args->from && match_int(args, &arg))
530 return -EINVAL;
531 if (test_opt(sbi, RESERVE_ROOT)) {
532 f2fs_msg(sb, KERN_INFO,
533 "Preserve previous reserve_root=%u",
63189b78 534 F2FS_OPTION(sbi).root_reserved_blocks);
7e65be49 535 } else {
63189b78 536 F2FS_OPTION(sbi).root_reserved_blocks = arg;
7e65be49
JK		 537 set_opt(sbi, RESERVE_ROOT);
538 }
539 break;
7c2e5963
JK		 540 case Opt_resuid:
541 if (args->from && match_int(args, &arg))
542 return -EINVAL;
543 uid = make_kuid(current_user_ns(), arg);
544 if (!uid_valid(uid)) {
545 f2fs_msg(sb, KERN_ERR,
546 "Invalid uid value %d", arg);
547 return -EINVAL;
548 }
63189b78 549 F2FS_OPTION(sbi).s_resuid = uid;
7c2e5963
JK		 550 break;
551 case Opt_resgid:
552 if (args->from && match_int(args, &arg))
553 return -EINVAL;
554 gid = make_kgid(current_user_ns(), arg);
555 if (!gid_valid(gid)) {
556 f2fs_msg(sb, KERN_ERR,
557 "Invalid gid value %d", arg);
558 return -EINVAL;
559 }
63189b78 560 F2FS_OPTION(sbi).s_resgid = gid;
7c2e5963 561 break;
36abef4e
JK		 562 case Opt_mode:
563 name = match_strdup(&args[0]);
564
565 if (!name)
566 return -ENOMEM;
567 if (strlen(name) == 8 &&
568 !strncmp(name, "adaptive", 8)) {
7beb01f7 569 if (f2fs_sb_has_blkzoned(sbi)) {
3adc57e9
DLM		 570 f2fs_msg(sb, KERN_WARNING,
571 "adaptive mode is not allowed with "
572 "zoned block device feature");
5222595d 573 kvfree(name);
3adc57e9
DLM		 574 return -EINVAL;
575 }
52763a4b 576 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
36abef4e
JK		 577 } else if (strlen(name) == 3 &&
578 !strncmp(name, "lfs", 3)) {
52763a4b 579 set_opt_mode(sbi, F2FS_MOUNT_LFS);
36abef4e 580 } else {
5222595d 581 kvfree(name);
36abef4e
JK		 582 return -EINVAL;
583 }
5222595d 584 kvfree(name);
36abef4e 585 break;
ec91538d
JK		 586 case Opt_io_size_bits:
587 if (args->from && match_int(args, &arg))
588 return -EINVAL;
589 if (arg > __ilog2_u32(BIO_MAX_PAGES)) {
590 f2fs_msg(sb, KERN_WARNING,
591 "Not support %d, larger than %d",
592 1 << arg, BIO_MAX_PAGES);
593 return -EINVAL;
594 }
63189b78 595 F2FS_OPTION(sbi).write_io_size_bits = arg;
ec91538d 596 break;
4cb037ec 597#ifdef CONFIG_F2FS_FAULT_INJECTION
73faec4d
JK		 598 case Opt_fault_injection:
599 if (args->from && match_int(args, &arg))
600 return -EINVAL;
d494500a
CY		 601 f2fs_build_fault_attr(sbi, arg, F2FS_ALL_FAULT_TYPE);
602 set_opt(sbi, FAULT_INJECTION);
d494500a 603 break;
4cb037ec 604
d494500a
CY		 605 case Opt_fault_type:
606 if (args->from && match_int(args, &arg))
607 return -EINVAL;
d494500a 608 f2fs_build_fault_attr(sbi, 0, arg);
0cc0dec2 609 set_opt(sbi, FAULT_INJECTION);
4cb037ec 610 break;
73faec4d 611#else
4cb037ec 612 case Opt_fault_injection:
73faec4d 613 f2fs_msg(sb, KERN_INFO,
4cb037ec 614 "fault_injection options not supported");
73faec4d 615 break;
4cb037ec
CX		 616
617 case Opt_fault_type:
618 f2fs_msg(sb, KERN_INFO,
619 "fault_type options not supported");
620 break;
621#endif
6d94c74a 622 case Opt_lazytime:
1751e8a6 623 sb->s_flags |= SB_LAZYTIME;
6d94c74a
JK		 624 break;
625 case Opt_nolazytime:
1751e8a6 626 sb->s_flags &= ~SB_LAZYTIME;
6d94c74a 627 break;
0abd675e 628#ifdef CONFIG_QUOTA
4b2414d0 629 case Opt_quota:
0abd675e
CY		 630 case Opt_usrquota:
631 set_opt(sbi, USRQUOTA);
632 break;
633 case Opt_grpquota:
634 set_opt(sbi, GRPQUOTA);
635 break;
5c57132e
CY		 636 case Opt_prjquota:
637 set_opt(sbi, PRJQUOTA);
638 break;
4b2414d0
CY		 639 case Opt_usrjquota:
640 ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
641 if (ret)
642 return ret;
643 break;
644 case Opt_grpjquota:
645 ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
646 if (ret)
647 return ret;
648 break;
649 case Opt_prjjquota:
650 ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
651 if (ret)
652 return ret;
653 break;
654 case Opt_offusrjquota:
655 ret = f2fs_clear_qf_name(sb, USRQUOTA);
656 if (ret)
657 return ret;
658 break;
659 case Opt_offgrpjquota:
660 ret = f2fs_clear_qf_name(sb, GRPQUOTA);
661 if (ret)
662 return ret;
663 break;
664 case Opt_offprjjquota:
665 ret = f2fs_clear_qf_name(sb, PRJQUOTA);
666 if (ret)
667 return ret;
668 break;
669 case Opt_jqfmt_vfsold:
63189b78 670 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_OLD;
4b2414d0
CY		 671 break;
672 case Opt_jqfmt_vfsv0:
63189b78 673 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V0;
4b2414d0
CY		 674 break;
675 case Opt_jqfmt_vfsv1:
63189b78 676 F2FS_OPTION(sbi).s_jquota_fmt = QFMT_VFS_V1;
4b2414d0
CY		 677 break;
678 case Opt_noquota:
679 clear_opt(sbi, QUOTA);
680 clear_opt(sbi, USRQUOTA);
681 clear_opt(sbi, GRPQUOTA);
682 clear_opt(sbi, PRJQUOTA);
683 break;
0abd675e 684#else
4b2414d0 685 case Opt_quota:
0abd675e
CY		 686 case Opt_usrquota:
687 case Opt_grpquota:
5c57132e 688 case Opt_prjquota:
4b2414d0
CY		 689 case Opt_usrjquota:
690 case Opt_grpjquota:
691 case Opt_prjjquota:
692 case Opt_offusrjquota:
693 case Opt_offgrpjquota:
694 case Opt_offprjjquota:
695 case Opt_jqfmt_vfsold:
696 case Opt_jqfmt_vfsv0:
697 case Opt_jqfmt_vfsv1:
698 case Opt_noquota:
0abd675e
CY		 699 f2fs_msg(sb, KERN_INFO,
700 "quota operations not supported");
701 break;
702#endif
0cdd3195
HL		 703 case Opt_whint:
704 name = match_strdup(&args[0]);
705 if (!name)
706 return -ENOMEM;
707 if (strlen(name) == 10 &&
708 !strncmp(name, "user-based", 10)) {
63189b78 709 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_USER;
0cdd3195
HL		 710 } else if (strlen(name) == 3 &&
711 !strncmp(name, "off", 3)) {
63189b78 712 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
f2e703f9
HL		 713 } else if (strlen(name) == 8 &&
714 !strncmp(name, "fs-based", 8)) {
63189b78 715 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_FS;
0cdd3195 716 } else {
5222595d 717 kvfree(name);
0cdd3195
HL		 718 return -EINVAL;
719 }
5222595d 720 kvfree(name);
0cdd3195 721 break;
07939627
JK		 722 case Opt_alloc:
723 name = match_strdup(&args[0]);
724 if (!name)
725 return -ENOMEM;
726
727 if (strlen(name) == 7 &&
728 !strncmp(name, "default", 7)) {
63189b78 729 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
07939627
JK		 730 } else if (strlen(name) == 5 &&
731 !strncmp(name, "reuse", 5)) {
63189b78 732 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
07939627 733 } else {
5222595d 734 kvfree(name);
07939627
JK		 735 return -EINVAL;
736 }
5222595d 737 kvfree(name);
07939627 738 break;
93cf93f1
JZ		 739 case Opt_fsync:
740 name = match_strdup(&args[0]);
741 if (!name)
742 return -ENOMEM;
743 if (strlen(name) == 5 &&
744 !strncmp(name, "posix", 5)) {
63189b78 745 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
93cf93f1
JZ		 746 } else if (strlen(name) == 6 &&
747 !strncmp(name, "strict", 6)) {
63189b78 748 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_STRICT;
d6290814
JK		 749 } else if (strlen(name) == 9 &&
750 !strncmp(name, "nobarrier", 9)) {
751 F2FS_OPTION(sbi).fsync_mode =
752 FSYNC_MODE_NOBARRIER;
93cf93f1 753 } else {
5222595d 754 kvfree(name);
93cf93f1
JZ		 755 return -EINVAL;
756 }
5222595d 757 kvfree(name);
93cf93f1 758 break;
ff62af20 759 case Opt_test_dummy_encryption:
643fa961 760#ifdef CONFIG_FS_ENCRYPTION
7beb01f7 761 if (!f2fs_sb_has_encrypt(sbi)) {
ff62af20
SY		 762 f2fs_msg(sb, KERN_ERR, "Encrypt feature is off");
763 return -EINVAL;
764 }
765
766 F2FS_OPTION(sbi).test_dummy_encryption = true;
767 f2fs_msg(sb, KERN_INFO,
768 "Test dummy encryption mode enabled");
769#else
770 f2fs_msg(sb, KERN_INFO,
771 "Test dummy encryption mount option ignored");
772#endif
773 break;
4354994f
DR		 774 case Opt_checkpoint:
775 name = match_strdup(&args[0]);
776 if (!name)
777 return -ENOMEM;
778
779 if (strlen(name) == 6 &&
780 !strncmp(name, "enable", 6)) {
781 clear_opt(sbi, DISABLE_CHECKPOINT);
782 } else if (strlen(name) == 7 &&
783 !strncmp(name, "disable", 7)) {
784 set_opt(sbi, DISABLE_CHECKPOINT);
785 } else {
5222595d 786 kvfree(name);
4354994f
DR		 787 return -EINVAL;
788 }
5222595d 789 kvfree(name);
4354994f 790 break;
696c018c
NJ		 791 default:
792 f2fs_msg(sb, KERN_ERR,
793 "Unrecognized mount option \"%s\" or missing value",
794 p);
795 return -EINVAL;
796 }
797 }
4b2414d0
CY		 798#ifdef CONFIG_QUOTA
799 if (f2fs_check_quota_options(sbi))
800 return -EINVAL;
00960c2c 801#else
7beb01f7 802 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
00960c2c
SY		 803 f2fs_msg(sbi->sb, KERN_INFO,
804 "Filesystem with quota feature cannot be mounted RDWR "
805 "without CONFIG_QUOTA");
806 return -EINVAL;
807 }
7beb01f7 808 if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
4ddc1b28
CY		 809 f2fs_msg(sb, KERN_ERR,
810 "Filesystem with project quota feature cannot be "
811 "mounted RDWR without CONFIG_QUOTA");
812 return -EINVAL;
813 }
4b2414d0 814#endif
ec91538d
JK		 815
816 if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
817 f2fs_msg(sb, KERN_ERR,
818 "Should set mode=lfs with %uKB-sized IO",
819 F2FS_IO_SIZE_KB(sbi));
820 return -EINVAL;
821 }
6afc662e
CY		 822
823 if (test_opt(sbi, INLINE_XATTR_SIZE)) {
7beb01f7
CY		 824 if (!f2fs_sb_has_extra_attr(sbi) ||
825 !f2fs_sb_has_flexible_inline_xattr(sbi)) {
4d817ae0
CY		 826 f2fs_msg(sb, KERN_ERR,
827 "extra_attr or flexible_inline_xattr "
828 "feature is off");
829 return -EINVAL;
830 }
6afc662e
CY		 831 if (!test_opt(sbi, INLINE_XATTR)) {
832 f2fs_msg(sb, KERN_ERR,
833 "inline_xattr_size option should be "
834 "set with inline_xattr option");
835 return -EINVAL;
836 }
63189b78
CY		 837 if (!F2FS_OPTION(sbi).inline_xattr_size ||
838 F2FS_OPTION(sbi).inline_xattr_size >=
839 DEF_ADDRS_PER_INODE -
6afc662e
CY		 840 F2FS_TOTAL_EXTRA_ATTR_SIZE -
841 DEF_INLINE_RESERVED_SIZE -
842 DEF_MIN_INLINE_SIZE) {
843 f2fs_msg(sb, KERN_ERR,
844 "inline xattr size is out of range");
845 return -EINVAL;
846 }
847 }
0cdd3195 848
4354994f
DR		 849 if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
850 f2fs_msg(sb, KERN_ERR,
851 "LFS not compatible with checkpoint=disable\n");
852 return -EINVAL;
853 }
854
0cdd3195
HL		 855 /* Not pass down write hints if the number of active logs is lesser
856 * than NR_CURSEG_TYPE.
857 */
63189b78
CY		 858 if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
859 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
696c018c
NJ		 860 return 0;
861}
862
aff063e2
JK		 863static struct inode *f2fs_alloc_inode(struct super_block *sb)
864{
865 struct f2fs_inode_info *fi;
866
a0acdfe0 867 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
aff063e2
JK		 868 if (!fi)
869 return NULL;
870
871 init_once((void *) fi);
872
434720fa 873 /* Initialize f2fs-specific inode info */
204706c7 874 atomic_set(&fi->dirty_pages, 0);
d928bfbf 875 init_rwsem(&fi->i_sem);
2710fd7e 876 INIT_LIST_HEAD(&fi->dirty_list);
0f18b462 877 INIT_LIST_HEAD(&fi->gdirty_list);
57864ae5 878 INIT_LIST_HEAD(&fi->inmem_ilist);
88b88a66
JK		 879 INIT_LIST_HEAD(&fi->inmem_pages);
880 mutex_init(&fi->inmem_lock);
b2532c69
CY		 881 init_rwsem(&fi->i_gc_rwsem[READ]);
882 init_rwsem(&fi->i_gc_rwsem[WRITE]);
5a3a2d83 883 init_rwsem(&fi->i_mmap_sem);
27161f13 884 init_rwsem(&fi->i_xattr_sem);
aff063e2 885
ab9fa662
JK		 886 /* Will be used by directory only */
887 fi->i_dir_level = F2FS_SB(sb)->dir_level;
f2470371 888
aff063e2
JK		 889 return &fi->vfs_inode;
890}
891
531ad7d5
JK		 892static int f2fs_drop_inode(struct inode *inode)
893{
b8d96a30 894 int ret;
531ad7d5
JK		 895 /*
896 * This is to avoid a deadlock condition like below.
897 * writeback_single_inode(inode)
898 * - f2fs_write_data_page
899 * - f2fs_gc -> iput -> evict
900 * - inode_wait_for_writeback(inode)
901 */
0f18b462 902 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
06e1bc05 903 if (!inode->i_nlink && !is_bad_inode(inode)) {
3e72f721
JK		 904 /* to avoid evict_inode call simultaneously */
905 atomic_inc(&inode->i_count);
06e1bc05
JK		 906 spin_unlock(&inode->i_lock);
907
908 /* some remained atomic pages should discarded */
909 if (f2fs_is_atomic_file(inode))
4d57b86d 910 f2fs_drop_inmem_pages(inode);
06e1bc05 911
3e72f721
JK		 912 /* should remain fi->extent_tree for writepage */
913 f2fs_destroy_extent_node(inode);
914
06e1bc05 915 sb_start_intwrite(inode->i_sb);
fc9581c8 916 f2fs_i_size_write(inode, 0);
06e1bc05
JK		 917
918 if (F2FS_HAS_BLOCKS(inode))
9a449e9c 919 f2fs_truncate(inode);
06e1bc05
JK		 920
921 sb_end_intwrite(inode->i_sb);
922
06e1bc05 923 spin_lock(&inode->i_lock);
3e72f721 924 atomic_dec(&inode->i_count);
06e1bc05 925 }
b8d96a30 926 trace_f2fs_drop_inode(inode, 0);
531ad7d5 927 return 0;
06e1bc05 928 }
b8d96a30
HP		 929 ret = generic_drop_inode(inode);
930 trace_f2fs_drop_inode(inode, ret);
931 return ret;
531ad7d5
JK		 932}
933
7c45729a 934int f2fs_inode_dirtied(struct inode *inode, bool sync)
b3783873 935{
0f18b462 936 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
7c45729a 937 int ret = 0;
0f18b462 938
0f18b462
JK		 939 spin_lock(&sbi->inode_lock[DIRTY_META]);
940 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
7c45729a
JK		 941 ret = 1;
942 } else {
943 set_inode_flag(inode, FI_DIRTY_INODE);
944 stat_inc_dirty_inode(sbi, DIRTY_META);
0f18b462 945 }
7c45729a
JK		 946 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
947 list_add_tail(&F2FS_I(inode)->gdirty_list,
0f18b462 948 &sbi->inode_list[DIRTY_META]);
7c45729a
JK		 949 inc_page_count(sbi, F2FS_DIRTY_IMETA);
950 }
338bbfa0 951 spin_unlock(&sbi->inode_lock[DIRTY_META]);
7c45729a 952 return ret;
0f18b462
JK		 953}
954
955void f2fs_inode_synced(struct inode *inode)
956{
957 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
958
959 spin_lock(&sbi->inode_lock[DIRTY_META]);
960 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
961 spin_unlock(&sbi->inode_lock[DIRTY_META]);
962 return;
963 }
7c45729a
JK		 964 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
965 list_del_init(&F2FS_I(inode)->gdirty_list);
966 dec_page_count(sbi, F2FS_DIRTY_IMETA);
967 }
0f18b462 968 clear_inode_flag(inode, FI_DIRTY_INODE);
26de9b11 969 clear_inode_flag(inode, FI_AUTO_RECOVER);
0f18b462 970 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
338bbfa0 971 spin_unlock(&sbi->inode_lock[DIRTY_META]);
b3783873
JK		 972}
973
b56ab837
JK		 974/*
975 * f2fs_dirty_inode() is called from __mark_inode_dirty()
976 *
977 * We should call set_dirty_inode to write the dirty inode through write_inode.
978 */
979static void f2fs_dirty_inode(struct inode *inode, int flags)
980{
981 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
982
983 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
984 inode->i_ino == F2FS_META_INO(sbi))
985 return;
986
987 if (flags == I_DIRTY_TIME)
988 return;
989
990 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
991 clear_inode_flag(inode, FI_AUTO_RECOVER);
992
7c45729a 993 f2fs_inode_dirtied(inode, false);
b56ab837
JK		 994}
995
aff063e2
JK		 996static void f2fs_i_callback(struct rcu_head *head)
997{
998 struct inode *inode = container_of(head, struct inode, i_rcu);
999 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
1000}
1001
25ca923b 1002static void f2fs_destroy_inode(struct inode *inode)
aff063e2
JK		 1003{
1004 call_rcu(&inode->i_rcu, f2fs_i_callback);
1005}
1006
523be8a6
JK		 1007static void destroy_percpu_info(struct f2fs_sb_info *sbi)
1008{
41382ec4 1009 percpu_counter_destroy(&sbi->alloc_valid_block_count);
513c5f37 1010 percpu_counter_destroy(&sbi->total_valid_inode_count);
523be8a6
JK		 1011}
1012
3c62be17
JK		 1013static void destroy_device_list(struct f2fs_sb_info *sbi)
1014{
1015 int i;
1016
1017 for (i = 0; i < sbi->s_ndevs; i++) {
1018 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
1019#ifdef CONFIG_BLK_DEV_ZONED
5222595d 1020 kvfree(FDEV(i).blkz_type);
3c62be17
JK		 1021#endif
1022 }
5222595d 1023 kvfree(sbi->devs);
3c62be17
JK		 1024}
1025
aff063e2
JK		 1026static void f2fs_put_super(struct super_block *sb)
1027{
1028 struct f2fs_sb_info *sbi = F2FS_SB(sb);
a398101a 1029 int i;
cf5c759f 1030 bool dropped;
aff063e2 1031
0abd675e 1032 f2fs_quota_off_umount(sb);
aff063e2 1033
2658e50d
JK		 1034 /* prevent remaining shrinker jobs */
1035 mutex_lock(&sbi->umount_mutex);
1036
85dc2f2c
JK		 1037 /*
1038 * We don't need to do checkpoint when superblock is clean.
1039 * But, the previous checkpoint was not done by umount, it needs to do
1040 * clean checkpoint again.
1041 */
4354994f
DR		 1042 if ((is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
1043 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG))) {
75ab4cb8
JK		 1044 struct cp_control cpc = {
1045 .reason = CP_UMOUNT,
1046 };
4d57b86d 1047 f2fs_write_checkpoint(sbi, &cpc);
75ab4cb8 1048 }
aff063e2 1049
4e6a8d9b 1050 /* be sure to wait for any on-going discard commands */
cf5c759f 1051 dropped = f2fs_wait_discard_bios(sbi);
4e6a8d9b 1052
7d20c8ab
CY		 1053 if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
1054 !sbi->discard_blks && !dropped) {
1f43e2ad
CY		 1055 struct cp_control cpc = {
1056 .reason = CP_UMOUNT | CP_TRIMMED,
1057 };
4d57b86d 1058 f2fs_write_checkpoint(sbi, &cpc);
1f43e2ad
CY		 1059 }
1060
cf779cab
JK		 1061 /*
1062 * normally superblock is clean, so we need to release this.
1063 * In addition, EIO will skip do checkpoint, we need this as well.
1064 */
4d57b86d 1065 f2fs_release_ino_entry(sbi, true);
6f12ac25 1066
2658e50d
JK		 1067 f2fs_leave_shrinker(sbi);
1068 mutex_unlock(&sbi->umount_mutex);
1069
17c19120 1070 /* our cp_error case, we can wait for any writeback page */
b9109b0e 1071 f2fs_flush_merged_writes(sbi);
17c19120 1072
50fa53ec
CY		 1073 f2fs_wait_on_all_pages_writeback(sbi);
1074
1075 f2fs_bug_on(sbi, sbi->fsync_node_num);
1076
aff063e2
JK		 1077 iput(sbi->node_inode);
1078 iput(sbi->meta_inode);
1079
60aa4d55
ST		 1080 /*
1081 * iput() can update stat information, if f2fs_write_checkpoint()
1082 * above failed with error.
1083 */
1084 f2fs_destroy_stats(sbi);
1085
aff063e2 1086 /* destroy f2fs internal modules */
4d57b86d
CY		 1087 f2fs_destroy_node_manager(sbi);
1088 f2fs_destroy_segment_manager(sbi);
aff063e2 1089
5222595d 1090 kvfree(sbi->ckpt);
a398101a 1091
dc6b2055 1092 f2fs_unregister_sysfs(sbi);
aff063e2
JK		 1093
1094 sb->s_fs_info = NULL;
43b6573b
KM		 1095 if (sbi->s_chksum_driver)
1096 crypto_free_shash(sbi->s_chksum_driver);
5222595d 1097 kvfree(sbi->raw_super);
523be8a6 1098
3c62be17 1099 destroy_device_list(sbi);
b6895e8f 1100 mempool_destroy(sbi->write_io_dummy);
4b2414d0
CY		 1101#ifdef CONFIG_QUOTA
1102 for (i = 0; i < MAXQUOTAS; i++)
5222595d 1103 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
4b2414d0 1104#endif
523be8a6 1105 destroy_percpu_info(sbi);
a912b54d 1106 for (i = 0; i < NR_PAGE_TYPE; i++)
5222595d
JK		 1107 kvfree(sbi->write_io[i]);
1108 kvfree(sbi);
aff063e2
JK		 1109}
1110
1111int f2fs_sync_fs(struct super_block *sb, int sync)
1112{
1113 struct f2fs_sb_info *sbi = F2FS_SB(sb);
c34f42e2 1114 int err = 0;
aff063e2 1115
1f227a3e
JK		 1116 if (unlikely(f2fs_cp_error(sbi)))
1117 return 0;
4354994f
DR		 1118 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
1119 return 0;
1f227a3e 1120
a2a4a7e4
NJ		 1121 trace_f2fs_sync_fs(sb, sync);
1122
4b2414d0
CY		 1123 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1124 return -EAGAIN;
1125
b7473754 1126 if (sync) {
d5053a34
JK		 1127 struct cp_control cpc;
1128
119ee914
JK		 1129 cpc.reason = __get_cp_reason(sbi);
1130
b7473754 1131 mutex_lock(&sbi->gc_mutex);
4d57b86d 1132 err = f2fs_write_checkpoint(sbi, &cpc);
b7473754 1133 mutex_unlock(&sbi->gc_mutex);
b7473754 1134 }
05ca3632 1135 f2fs_trace_ios(NULL, 1);
aff063e2 1136
c34f42e2 1137 return err;
aff063e2
JK		 1138}
1139
d6212a5f
CL		 1140static int f2fs_freeze(struct super_block *sb)
1141{
77888c1e 1142 if (f2fs_readonly(sb))
d6212a5f
CL		 1143 return 0;
1144
b4b9d34c
JK		 1145 /* IO error happened before */
1146 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
1147 return -EIO;
1148
1149 /* must be clean, since sync_filesystem() was already called */
1150 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
1151 return -EINVAL;
1152 return 0;
d6212a5f
CL		 1153}
1154
1155static int f2fs_unfreeze(struct super_block *sb)
1156{
1157 return 0;
1158}
1159
ddc34e32
CY		 1160#ifdef CONFIG_QUOTA
1161static int f2fs_statfs_project(struct super_block *sb,
1162 kprojid_t projid, struct kstatfs *buf)
1163{
1164 struct kqid qid;
1165 struct dquot *dquot;
1166 u64 limit;
1167 u64 curblock;
1168
1169 qid = make_kqid_projid(projid);
1170 dquot = dqget(sb, qid);
1171 if (IS_ERR(dquot))
1172 return PTR_ERR(dquot);
955ac6e5 1173 spin_lock(&dquot->dq_dqb_lock);
ddc34e32
CY		 1174
1175 limit = (dquot->dq_dqb.dqb_bsoftlimit ?
1176 dquot->dq_dqb.dqb_bsoftlimit :
1177 dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
1178 if (limit && buf->f_blocks > limit) {
1179 curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
1180 buf->f_blocks = limit;
1181 buf->f_bfree = buf->f_bavail =
1182 (buf->f_blocks > curblock) ?
1183 (buf->f_blocks - curblock) : 0;
1184 }
1185
1186 limit = dquot->dq_dqb.dqb_isoftlimit ?
1187 dquot->dq_dqb.dqb_isoftlimit :
1188 dquot->dq_dqb.dqb_ihardlimit;
1189 if (limit && buf->f_files > limit) {
1190 buf->f_files = limit;
1191 buf->f_ffree =
1192 (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
1193 (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
1194 }
1195
955ac6e5 1196 spin_unlock(&dquot->dq_dqb_lock);
ddc34e32
CY		 1197 dqput(dquot);
1198 return 0;
1199}
1200#endif
1201
aff063e2
JK		 1202static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
1203{
1204 struct super_block *sb = dentry->d_sb;
1205 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1206 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
f66c027e 1207 block_t total_count, user_block_count, start_count;
0cc091d0 1208 u64 avail_node_count;
aff063e2
JK		 1209
1210 total_count = le64_to_cpu(sbi->raw_super->block_count);
1211 user_block_count = sbi->user_block_count;
1212 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
aff063e2
JK		 1213 buf->f_type = F2FS_SUPER_MAGIC;
1214 buf->f_bsize = sbi->blocksize;
1215
1216 buf->f_blocks = total_count - start_count;
f66c027e 1217 buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
80d42145 1218 sbi->current_reserved_blocks;
4354994f
DR		 1219 if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
1220 buf->f_bfree = 0;
1221 else
1222 buf->f_bfree -= sbi->unusable_block_count;
1223
63189b78
CY		 1224 if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
1225 buf->f_bavail = buf->f_bfree -
1226 F2FS_OPTION(sbi).root_reserved_blocks;
7e65be49
JK		 1227 else
1228 buf->f_bavail = 0;
aff063e2 1229
292c196a
CY		 1230 avail_node_count = sbi->total_node_count - sbi->nquota_files -
1231 F2FS_RESERVED_NODE_NUM;
0cc091d0
JK		 1232
1233 if (avail_node_count > user_block_count) {
1234 buf->f_files = user_block_count;
1235 buf->f_ffree = buf->f_bavail;
1236 } else {
1237 buf->f_files = avail_node_count;
1238 buf->f_ffree = min(avail_node_count - valid_node_count(sbi),
1239 buf->f_bavail);
1240 }
aff063e2 1241
5a20d339 1242 buf->f_namelen = F2FS_NAME_LEN;
aff063e2
JK		 1243 buf->f_fsid.val[0] = (u32)id;
1244 buf->f_fsid.val[1] = (u32)(id >> 32);
1245
ddc34e32
CY		 1246#ifdef CONFIG_QUOTA
1247 if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
1248 sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
1249 f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
1250 }
1251#endif
aff063e2
JK		 1252 return 0;
1253}
1254
4b2414d0
CY		 1255static inline void f2fs_show_quota_options(struct seq_file *seq,
1256 struct super_block *sb)
1257{
1258#ifdef CONFIG_QUOTA
1259 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1260
63189b78 1261 if (F2FS_OPTION(sbi).s_jquota_fmt) {
4b2414d0
CY		 1262 char *fmtname = "";
1263
63189b78 1264 switch (F2FS_OPTION(sbi).s_jquota_fmt) {
4b2414d0
CY		 1265 case QFMT_VFS_OLD:
1266 fmtname = "vfsold";
1267 break;
1268 case QFMT_VFS_V0:
1269 fmtname = "vfsv0";
1270 break;
1271 case QFMT_VFS_V1:
1272 fmtname = "vfsv1";
1273 break;
1274 }
1275 seq_printf(seq, ",jqfmt=%s", fmtname);
1276 }
1277
63189b78
CY		 1278 if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
1279 seq_show_option(seq, "usrjquota",
1280 F2FS_OPTION(sbi).s_qf_names[USRQUOTA]);
4b2414d0 1281
63189b78
CY		 1282 if (F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
1283 seq_show_option(seq, "grpjquota",
1284 F2FS_OPTION(sbi).s_qf_names[GRPQUOTA]);
4b2414d0 1285
63189b78
CY		 1286 if (F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
1287 seq_show_option(seq, "prjjquota",
1288 F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]);
4b2414d0
CY		 1289#endif
1290}
1291
aff063e2
JK		 1292static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
1293{
1294 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
1295
6aefd93b
JK		 1296 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
1297 if (test_opt(sbi, FORCE_FG_GC))
1298 seq_printf(seq, ",background_gc=%s", "sync");
1299 else
1300 seq_printf(seq, ",background_gc=%s", "on");
1301 } else {
696c018c 1302 seq_printf(seq, ",background_gc=%s", "off");
6aefd93b 1303 }
aff063e2
JK		 1304 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
1305 seq_puts(seq, ",disable_roll_forward");
1306 if (test_opt(sbi, DISCARD))
1307 seq_puts(seq, ",discard");
1308 if (test_opt(sbi, NOHEAP))
7a20b8a6
JK		 1309 seq_puts(seq, ",no_heap");
1310 else
1311 seq_puts(seq, ",heap");
aff063e2
JK		 1312#ifdef CONFIG_F2FS_FS_XATTR
1313 if (test_opt(sbi, XATTR_USER))
1314 seq_puts(seq, ",user_xattr");
1315 else
1316 seq_puts(seq, ",nouser_xattr");
444c580f
JK		 1317 if (test_opt(sbi, INLINE_XATTR))
1318 seq_puts(seq, ",inline_xattr");
23cf7212
CY		 1319 else
1320 seq_puts(seq, ",noinline_xattr");
6afc662e
CY		 1321 if (test_opt(sbi, INLINE_XATTR_SIZE))
1322 seq_printf(seq, ",inline_xattr_size=%u",
63189b78 1323 F2FS_OPTION(sbi).inline_xattr_size);
aff063e2
JK		 1324#endif
1325#ifdef CONFIG_F2FS_FS_POSIX_ACL
1326 if (test_opt(sbi, POSIX_ACL))
1327 seq_puts(seq, ",acl");
1328 else
1329 seq_puts(seq, ",noacl");
1330#endif
1331 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
aa43507f 1332 seq_puts(seq, ",disable_ext_identify");
8274de77
HL		 1333 if (test_opt(sbi, INLINE_DATA))
1334 seq_puts(seq, ",inline_data");
75342797
WL		 1335 else
1336 seq_puts(seq, ",noinline_data");
5efd3c6f
CY		 1337 if (test_opt(sbi, INLINE_DENTRY))
1338 seq_puts(seq, ",inline_dentry");
97c1794a
CY		 1339 else
1340 seq_puts(seq, ",noinline_dentry");
b270ad6f 1341 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
6b4afdd7 1342 seq_puts(seq, ",flush_merge");
0f7b2abd
JK		 1343 if (test_opt(sbi, NOBARRIER))
1344 seq_puts(seq, ",nobarrier");
d5053a34
JK		 1345 if (test_opt(sbi, FASTBOOT))
1346 seq_puts(seq, ",fastboot");
89672159
CY		 1347 if (test_opt(sbi, EXTENT_CACHE))
1348 seq_puts(seq, ",extent_cache");
7daaea25
JK		 1349 else
1350 seq_puts(seq, ",noextent_cache");
343f40f0
CY		 1351 if (test_opt(sbi, DATA_FLUSH))
1352 seq_puts(seq, ",data_flush");
36abef4e
JK		 1353
1354 seq_puts(seq, ",mode=");
1355 if (test_opt(sbi, ADAPTIVE))
1356 seq_puts(seq, "adaptive");
1357 else if (test_opt(sbi, LFS))
1358 seq_puts(seq, "lfs");
63189b78 1359 seq_printf(seq, ",active_logs=%u", F2FS_OPTION(sbi).active_logs);
7e65be49 1360 if (test_opt(sbi, RESERVE_ROOT))
7c2e5963 1361 seq_printf(seq, ",reserve_root=%u,resuid=%u,resgid=%u",
63189b78
CY		 1362 F2FS_OPTION(sbi).root_reserved_blocks,
1363 from_kuid_munged(&init_user_ns,
1364 F2FS_OPTION(sbi).s_resuid),
1365 from_kgid_munged(&init_user_ns,
1366 F2FS_OPTION(sbi).s_resgid));
ec91538d 1367 if (F2FS_IO_SIZE_BITS(sbi))
c6b1867b
CX		 1368 seq_printf(seq, ",io_bits=%u",
1369 F2FS_OPTION(sbi).write_io_size_bits);
0cc0dec2 1370#ifdef CONFIG_F2FS_FAULT_INJECTION
d494500a 1371 if (test_opt(sbi, FAULT_INJECTION)) {
44529f89 1372 seq_printf(seq, ",fault_injection=%u",
63189b78 1373 F2FS_OPTION(sbi).fault_info.inject_rate);
d494500a
CY		 1374 seq_printf(seq, ",fault_type=%u",
1375 F2FS_OPTION(sbi).fault_info.inject_type);
1376 }
0cc0dec2 1377#endif
0abd675e 1378#ifdef CONFIG_QUOTA
4b2414d0
CY		 1379 if (test_opt(sbi, QUOTA))
1380 seq_puts(seq, ",quota");
0abd675e
CY		 1381 if (test_opt(sbi, USRQUOTA))
1382 seq_puts(seq, ",usrquota");
1383 if (test_opt(sbi, GRPQUOTA))
1384 seq_puts(seq, ",grpquota");
5c57132e
CY		 1385 if (test_opt(sbi, PRJQUOTA))
1386 seq_puts(seq, ",prjquota");
0cc0dec2 1387#endif
4b2414d0 1388 f2fs_show_quota_options(seq, sbi->sb);
63189b78 1389 if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_USER)
0cdd3195 1390 seq_printf(seq, ",whint_mode=%s", "user-based");
63189b78 1391 else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
f2e703f9 1392 seq_printf(seq, ",whint_mode=%s", "fs-based");
643fa961 1393#ifdef CONFIG_FS_ENCRYPTION
ff62af20
SY		 1394 if (F2FS_OPTION(sbi).test_dummy_encryption)
1395 seq_puts(seq, ",test_dummy_encryption");
1396#endif
aff063e2 1397
63189b78 1398 if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
07939627 1399 seq_printf(seq, ",alloc_mode=%s", "default");
63189b78 1400 else if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
07939627 1401 seq_printf(seq, ",alloc_mode=%s", "reuse");
93cf93f1 1402
4354994f
DR		 1403 if (test_opt(sbi, DISABLE_CHECKPOINT))
1404 seq_puts(seq, ",checkpoint=disable");
1405
63189b78 1406 if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
93cf93f1 1407 seq_printf(seq, ",fsync_mode=%s", "posix");
63189b78 1408 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
93cf93f1 1409 seq_printf(seq, ",fsync_mode=%s", "strict");
dc132802
ST		 1410 else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_NOBARRIER)
1411 seq_printf(seq, ",fsync_mode=%s", "nobarrier");
aff063e2
JK		 1412 return 0;
1413}
1414
498c5e9f
YH		 1415static void default_options(struct f2fs_sb_info *sbi)
1416{
1417 /* init some FS parameters */
63189b78
CY		 1418 F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
1419 F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
1420 F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
1421 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
1422 F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
ff62af20 1423 F2FS_OPTION(sbi).test_dummy_encryption = false;
0aa7e0f8
CY		 1424 F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
1425 F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
498c5e9f
YH		 1426
1427 set_opt(sbi, BG_GC);
39133a50 1428 set_opt(sbi, INLINE_XATTR);
498c5e9f 1429 set_opt(sbi, INLINE_DATA);
97c1794a 1430 set_opt(sbi, INLINE_DENTRY);
3e72f721 1431 set_opt(sbi, EXTENT_CACHE);
7a20b8a6 1432 set_opt(sbi, NOHEAP);
4354994f 1433 clear_opt(sbi, DISABLE_CHECKPOINT);
1751e8a6 1434 sbi->sb->s_flags |= SB_LAZYTIME;
69e9e427 1435 set_opt(sbi, FLUSH_MERGE);
7d20c8ab 1436 set_opt(sbi, DISCARD);
7beb01f7 1437 if (f2fs_sb_has_blkzoned(sbi))
a39e5365
CY		 1438 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1439 else
52763a4b 1440 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
498c5e9f
YH		 1441
1442#ifdef CONFIG_F2FS_FS_XATTR
1443 set_opt(sbi, XATTR_USER);
1444#endif
1445#ifdef CONFIG_F2FS_FS_POSIX_ACL
1446 set_opt(sbi, POSIX_ACL);
1447#endif
36dbd328 1448
d494500a 1449 f2fs_build_fault_attr(sbi, 0, 0);
498c5e9f
YH		 1450}
1451
ea676733
JK		 1452#ifdef CONFIG_QUOTA
1453static int f2fs_enable_quotas(struct super_block *sb);
1454#endif
4354994f
DR		 1455
1456static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
1457{
1458 struct cp_control cpc;
1459 int err;
1460
1461 sbi->sb->s_flags |= SB_ACTIVE;
1462
4354994f
DR		 1463 f2fs_update_time(sbi, DISABLE_TIME);
1464
1465 while (!f2fs_time_over(sbi, DISABLE_TIME)) {
8f31b466 1466 mutex_lock(&sbi->gc_mutex);
4354994f
DR		 1467 err = f2fs_gc(sbi, true, false, NULL_SEGNO);
1468 if (err == -ENODATA)
1469 break;
8f31b466 1470 if (err && err != -EAGAIN)
4354994f 1471 return err;
4354994f 1472 }
4354994f
DR		 1473
1474 err = sync_filesystem(sbi->sb);
1475 if (err)
1476 return err;
1477
1478 if (f2fs_disable_cp_again(sbi))
1479 return -EAGAIN;
1480
1481 mutex_lock(&sbi->gc_mutex);
1482 cpc.reason = CP_PAUSE;
1483 set_sbi_flag(sbi, SBI_CP_DISABLED);
1484 f2fs_write_checkpoint(sbi, &cpc);
1485
1486 sbi->unusable_block_count = 0;
1487 mutex_unlock(&sbi->gc_mutex);
1488 return 0;
1489}
1490
1491static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
1492{
1493 mutex_lock(&sbi->gc_mutex);
1494 f2fs_dirty_to_prefree(sbi);
1495
1496 clear_sbi_flag(sbi, SBI_CP_DISABLED);
1497 set_sbi_flag(sbi, SBI_IS_DIRTY);
1498 mutex_unlock(&sbi->gc_mutex);
1499
1500 f2fs_sync_fs(sbi->sb, 1);
1501}
1502
696c018c
NJ		 1503static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1504{
1505 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1506 struct f2fs_mount_info org_mount_opt;
0abd675e 1507 unsigned long old_sb_flags;
63189b78 1508 int err;
876dc59e
GZ		 1509 bool need_restart_gc = false;
1510 bool need_stop_gc = false;
9cd81ce3 1511 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
4354994f
DR		 1512 bool disable_checkpoint = test_opt(sbi, DISABLE_CHECKPOINT);
1513 bool checkpoint_changed;
4b2414d0 1514#ifdef CONFIG_QUOTA
4b2414d0
CY		 1515 int i, j;
1516#endif
696c018c
NJ		 1517
1518 /*
1519 * Save the old mount options in case we
1520 * need to restore them.
1521 */
1522 org_mount_opt = sbi->mount_opt;
0abd675e 1523 old_sb_flags = sb->s_flags;
696c018c 1524
4b2414d0 1525#ifdef CONFIG_QUOTA
63189b78 1526 org_mount_opt.s_jquota_fmt = F2FS_OPTION(sbi).s_jquota_fmt;
4b2414d0 1527 for (i = 0; i < MAXQUOTAS; i++) {
63189b78
CY		 1528 if (F2FS_OPTION(sbi).s_qf_names[i]) {
1529 org_mount_opt.s_qf_names[i] =
1530 kstrdup(F2FS_OPTION(sbi).s_qf_names[i],
1531 GFP_KERNEL);
1532 if (!org_mount_opt.s_qf_names[i]) {
4b2414d0 1533 for (j = 0; j < i; j++)
5222595d 1534 kvfree(org_mount_opt.s_qf_names[j]);
4b2414d0
CY		 1535 return -ENOMEM;
1536 }
1537 } else {
63189b78 1538 org_mount_opt.s_qf_names[i] = NULL;
4b2414d0
CY		 1539 }
1540 }
1541#endif
1542
df728b0f 1543 /* recover superblocks we couldn't write due to previous RO mount */
1751e8a6 1544 if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
df728b0f
JK		 1545 err = f2fs_commit_super(sbi, false);
1546 f2fs_msg(sb, KERN_INFO,
1547 "Try to recover all the superblocks, ret: %d", err);
1548 if (!err)
1549 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1550 }
1551
498c5e9f 1552 default_options(sbi);
26666c8a 1553
696c018c
NJ		 1554 /* parse mount options */
1555 err = parse_options(sb, data);
1556 if (err)
1557 goto restore_opts;
4354994f
DR		 1558 checkpoint_changed =
1559 disable_checkpoint != test_opt(sbi, DISABLE_CHECKPOINT);
696c018c
NJ		 1560
1561 /*
1562 * Previous and new state of filesystem is RO,
876dc59e 1563 * so skip checking GC and FLUSH_MERGE conditions.
696c018c 1564 */
1751e8a6 1565 if (f2fs_readonly(sb) && (*flags & SB_RDONLY))
696c018c
NJ		 1566 goto skip;
1567
ea676733 1568#ifdef CONFIG_QUOTA
1751e8a6 1569 if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) {
0abd675e
CY		 1570 err = dquot_suspend(sb, -1);
1571 if (err < 0)
1572 goto restore_opts;
4354994f 1573 } else if (f2fs_readonly(sb) && !(*flags & SB_RDONLY)) {
0abd675e 1574 /* dquot_resume needs RW */
1751e8a6 1575 sb->s_flags &= ~SB_RDONLY;
ea676733
JK		 1576 if (sb_any_quota_suspended(sb)) {
1577 dquot_resume(sb, -1);
7beb01f7 1578 } else if (f2fs_sb_has_quota_ino(sbi)) {
ea676733
JK		 1579 err = f2fs_enable_quotas(sb);
1580 if (err)
1581 goto restore_opts;
1582 }
0abd675e 1583 }
ea676733 1584#endif
9cd81ce3
CY		 1585 /* disallow enable/disable extent_cache dynamically */
1586 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1587 err = -EINVAL;
1588 f2fs_msg(sbi->sb, KERN_WARNING,
1589 "switch extent_cache option is not allowed");
1590 goto restore_opts;
1591 }
1592
4354994f
DR		 1593 if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
1594 err = -EINVAL;
1595 f2fs_msg(sbi->sb, KERN_WARNING,
1596 "disabling checkpoint not compatible with read-only");
1597 goto restore_opts;
1598 }
1599
696c018c
NJ		 1600 /*
1601 * We stop the GC thread if FS is mounted as RO
1602 * or if background_gc = off is passed in mount
1603 * option. Also sync the filesystem.
1604 */
1751e8a6 1605 if ((*flags & SB_RDONLY) || !test_opt(sbi, BG_GC)) {
696c018c 1606 if (sbi->gc_thread) {
4d57b86d 1607 f2fs_stop_gc_thread(sbi);
876dc59e 1608 need_restart_gc = true;
696c018c 1609 }
aba291b3 1610 } else if (!sbi->gc_thread) {
4d57b86d 1611 err = f2fs_start_gc_thread(sbi);
696c018c
NJ		 1612 if (err)
1613 goto restore_opts;
876dc59e
GZ		 1614 need_stop_gc = true;
1615 }
1616
63189b78
CY		 1617 if (*flags & SB_RDONLY ||
1618 F2FS_OPTION(sbi).whint_mode != org_mount_opt.whint_mode) {
faa0e55b
JK		 1619 writeback_inodes_sb(sb, WB_REASON_SYNC);
1620 sync_inodes_sb(sb);
1621
1622 set_sbi_flag(sbi, SBI_IS_DIRTY);
1623 set_sbi_flag(sbi, SBI_IS_CLOSE);
1624 f2fs_sync_fs(sb, 1);
1625 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1626 }
1627
4354994f
DR		 1628 if (checkpoint_changed) {
1629 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
1630 err = f2fs_disable_checkpoint(sbi);
1631 if (err)
1632 goto restore_gc;
1633 } else {
1634 f2fs_enable_checkpoint(sbi);
1635 }
1636 }
1637
876dc59e
GZ		 1638 /*
1639 * We stop issue flush thread if FS is mounted as RO
1640 * or if flush_merge is not passed in mount option.
1641 */
1751e8a6 1642 if ((*flags & SB_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
5eba8c5d 1643 clear_opt(sbi, FLUSH_MERGE);
4d57b86d 1644 f2fs_destroy_flush_cmd_control(sbi, false);
5eba8c5d 1645 } else {
4d57b86d 1646 err = f2fs_create_flush_cmd_control(sbi);
2163d198 1647 if (err)
a688b9d9 1648 goto restore_gc;
696c018c
NJ		 1649 }
1650skip:
4b2414d0
CY		 1651#ifdef CONFIG_QUOTA
1652 /* Release old quota file names */
1653 for (i = 0; i < MAXQUOTAS; i++)
5222595d 1654 kvfree(org_mount_opt.s_qf_names[i]);
4b2414d0 1655#endif
696c018c 1656 /* Update the POSIXACL Flag */
1751e8a6
LT		 1657 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
1658 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
df728b0f 1659
7e65be49 1660 limit_reserve_root(sbi);
095680f2 1661 *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
696c018c 1662 return 0;
876dc59e
GZ		 1663restore_gc:
1664 if (need_restart_gc) {
4d57b86d 1665 if (f2fs_start_gc_thread(sbi))
876dc59e 1666 f2fs_msg(sbi->sb, KERN_WARNING,
e1c42045 1667 "background gc thread has stopped");
876dc59e 1668 } else if (need_stop_gc) {
4d57b86d 1669 f2fs_stop_gc_thread(sbi);
876dc59e 1670 }
696c018c 1671restore_opts:
4b2414d0 1672#ifdef CONFIG_QUOTA
63189b78 1673 F2FS_OPTION(sbi).s_jquota_fmt = org_mount_opt.s_jquota_fmt;
4b2414d0 1674 for (i = 0; i < MAXQUOTAS; i++) {
5222595d 1675 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
63189b78 1676 F2FS_OPTION(sbi).s_qf_names[i] = org_mount_opt.s_qf_names[i];
4b2414d0
CY		 1677 }
1678#endif
696c018c 1679 sbi->mount_opt = org_mount_opt;
0abd675e 1680 sb->s_flags = old_sb_flags;
696c018c
NJ		 1681 return err;
1682}
1683
0abd675e
CY		 1684#ifdef CONFIG_QUOTA
1685/* Read data from quotafile */
1686static ssize_t f2fs_quota_read(struct super_block *sb, int type, char *data,
1687 size_t len, loff_t off)
1688{
1689 struct inode *inode = sb_dqopt(sb)->files[type];
1690 struct address_space *mapping = inode->i_mapping;
1691 block_t blkidx = F2FS_BYTES_TO_BLK(off);
1692 int offset = off & (sb->s_blocksize - 1);
1693 int tocopy;
1694 size_t toread;
1695 loff_t i_size = i_size_read(inode);
1696 struct page *page;
1697 char *kaddr;
1698
1699 if (off > i_size)
1700 return 0;
1701
1702 if (off + len > i_size)
1703 len = i_size - off;
1704 toread = len;
1705 while (toread > 0) {
1706 tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
1707repeat:
02117b8a 1708 page = read_cache_page_gfp(mapping, blkidx, GFP_NOFS);
4e46a023
JK		 1709 if (IS_ERR(page)) {
1710 if (PTR_ERR(page) == -ENOMEM) {
1711 congestion_wait(BLK_RW_ASYNC, HZ/50);
1712 goto repeat;
1713 }
af033b2a 1714 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
0abd675e 1715 return PTR_ERR(page);
4e46a023 1716 }
0abd675e
CY		 1717
1718 lock_page(page);
1719
1720 if (unlikely(page->mapping != mapping)) {
1721 f2fs_put_page(page, 1);
1722 goto repeat;
1723 }
1724 if (unlikely(!PageUptodate(page))) {
1725 f2fs_put_page(page, 1);
af033b2a 1726 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
0abd675e
CY		 1727 return -EIO;
1728 }
1729
1730 kaddr = kmap_atomic(page);
1731 memcpy(data, kaddr + offset, tocopy);
1732 kunmap_atomic(kaddr);
1733 f2fs_put_page(page, 1);
1734
1735 offset = 0;
1736 toread -= tocopy;
1737 data += tocopy;
1738 blkidx++;
1739 }
1740 return len;
1741}
1742
1743/* Write to quotafile */
1744static ssize_t f2fs_quota_write(struct super_block *sb, int type,
1745 const char *data, size_t len, loff_t off)
1746{
1747 struct inode *inode = sb_dqopt(sb)->files[type];
1748 struct address_space *mapping = inode->i_mapping;
1749 const struct address_space_operations *a_ops = mapping->a_ops;
1750 int offset = off & (sb->s_blocksize - 1);
1751 size_t towrite = len;
1752 struct page *page;
1753 char *kaddr;
1754 int err = 0;
1755 int tocopy;
1756
1757 while (towrite > 0) {
1758 tocopy = min_t(unsigned long, sb->s_blocksize - offset,
1759 towrite);
4e46a023 1760retry:
0abd675e
CY		 1761 err = a_ops->write_begin(NULL, mapping, off, tocopy, 0,
1762 &page, NULL);
4e46a023
JK		 1763 if (unlikely(err)) {
1764 if (err == -ENOMEM) {
1765 congestion_wait(BLK_RW_ASYNC, HZ/50);
1766 goto retry;
1767 }
af033b2a 1768 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
0abd675e 1769 break;
4e46a023 1770 }
0abd675e
CY		 1771
1772 kaddr = kmap_atomic(page);
1773 memcpy(kaddr + offset, data, tocopy);
1774 kunmap_atomic(kaddr);
1775 flush_dcache_page(page);
1776
1777 a_ops->write_end(NULL, mapping, off, tocopy, tocopy,
1778 page, NULL);
1779 offset = 0;
1780 towrite -= tocopy;
1781 off += tocopy;
1782 data += tocopy;
1783 cond_resched();
1784 }
1785
1786 if (len == towrite)
6e5b5d41 1787 return err;
0abd675e
CY		 1788 inode->i_mtime = inode->i_ctime = current_time(inode);
1789 f2fs_mark_inode_dirty_sync(inode, false);
1790 return len - towrite;
1791}
1792
1793static struct dquot **f2fs_get_dquots(struct inode *inode)
1794{
1795 return F2FS_I(inode)->i_dquot;
1796}
1797
1798static qsize_t *f2fs_get_reserved_space(struct inode *inode)
1799{
1800 return &F2FS_I(inode)->i_reserved_quota;
1801}
1802
4b2414d0
CY		 1803static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
1804{
af033b2a
CY		 1805 if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
1806 f2fs_msg(sbi->sb, KERN_ERR,
1807 "quota sysfile may be corrupted, skip loading it");
1808 return 0;
1809 }
1810
63189b78
CY		 1811 return dquot_quota_on_mount(sbi->sb, F2FS_OPTION(sbi).s_qf_names[type],
1812 F2FS_OPTION(sbi).s_jquota_fmt, type);
4b2414d0
CY		 1813}
1814
ea676733 1815int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
4b2414d0 1816{
ea676733
JK		 1817 int enabled = 0;
1818 int i, err;
1819
7beb01f7 1820 if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
ea676733
JK		 1821 err = f2fs_enable_quotas(sbi->sb);
1822 if (err) {
1823 f2fs_msg(sbi->sb, KERN_ERR,
1824 "Cannot turn on quota_ino: %d", err);
1825 return 0;
1826 }
1827 return 1;
1828 }
4b2414d0
CY		 1829
1830 for (i = 0; i < MAXQUOTAS; i++) {
63189b78 1831 if (F2FS_OPTION(sbi).s_qf_names[i]) {
ea676733
JK		 1832 err = f2fs_quota_on_mount(sbi, i);
1833 if (!err) {
1834 enabled = 1;
1835 continue;
1836 }
1837 f2fs_msg(sbi->sb, KERN_ERR,
1838 "Cannot turn on quotas: %d on %d", err, i);
4b2414d0
CY		 1839 }
1840 }
ea676733
JK		 1841 return enabled;
1842}
1843
1844static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
1845 unsigned int flags)
1846{
1847 struct inode *qf_inode;
1848 unsigned long qf_inum;
1849 int err;
1850
7beb01f7 1851 BUG_ON(!f2fs_sb_has_quota_ino(F2FS_SB(sb)));
ea676733
JK		 1852
1853 qf_inum = f2fs_qf_ino(sb, type);
1854 if (!qf_inum)
1855 return -EPERM;
1856
1857 qf_inode = f2fs_iget(sb, qf_inum);
1858 if (IS_ERR(qf_inode)) {
1859 f2fs_msg(sb, KERN_ERR,
1860 "Bad quota inode %u:%lu", type, qf_inum);
1861 return PTR_ERR(qf_inode);
1862 }
1863
1864 /* Don't account quota for quota files to avoid recursion */
1865 qf_inode->i_flags |= S_NOQUOTA;
1866 err = dquot_enable(qf_inode, type, format_id, flags);
1867 iput(qf_inode);
1868 return err;
1869}
1870
1871static int f2fs_enable_quotas(struct super_block *sb)
1872{
1873 int type, err = 0;
1874 unsigned long qf_inum;
1875 bool quota_mopt[MAXQUOTAS] = {
1876 test_opt(F2FS_SB(sb), USRQUOTA),
1877 test_opt(F2FS_SB(sb), GRPQUOTA),
1878 test_opt(F2FS_SB(sb), PRJQUOTA),
1879 };
1880
af033b2a
CY		 1881 if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
1882 f2fs_msg(sb, KERN_ERR,
1883 "quota file may be corrupted, skip loading it");
1884 return 0;
1885 }
1886
1887 sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
1888
ea676733
JK		 1889 for (type = 0; type < MAXQUOTAS; type++) {
1890 qf_inum = f2fs_qf_ino(sb, type);
1891 if (qf_inum) {
1892 err = f2fs_quota_enable(sb, type, QFMT_VFS_V1,
1893 DQUOT_USAGE_ENABLED |
1894 (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
1895 if (err) {
1896 f2fs_msg(sb, KERN_ERR,
1897 "Failed to enable quota tracking "
1898 "(type=%d, err=%d). Please run "
1899 "fsck to fix.", type, err);
1900 for (type--; type >= 0; type--)
1901 dquot_quota_off(sb, type);
af033b2a
CY		 1902 set_sbi_flag(F2FS_SB(sb),
1903 SBI_QUOTA_NEED_REPAIR);
ea676733
JK		 1904 return err;
1905 }
4b2414d0
CY		 1906 }
1907 }
ea676733 1908 return 0;
4b2414d0
CY		 1909}
1910
af033b2a 1911int f2fs_quota_sync(struct super_block *sb, int type)
0abd675e 1912{
af033b2a 1913 struct f2fs_sb_info *sbi = F2FS_SB(sb);
0abd675e
CY		 1914 struct quota_info *dqopt = sb_dqopt(sb);
1915 int cnt;
1916 int ret;
1917
1918 ret = dquot_writeback_dquots(sb, type);
1919 if (ret)
af033b2a 1920 goto out;
0abd675e
CY		 1921
1922 /*
1923 * Now when everything is written we can discard the pagecache so
1924 * that userspace sees the changes.
1925 */
1926 for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
af033b2a
CY		 1927 struct address_space *mapping;
1928
0abd675e
CY		 1929 if (type != -1 && cnt != type)
1930 continue;
1931 if (!sb_has_quota_active(sb, cnt))
1932 continue;
1933
af033b2a
CY		 1934 mapping = dqopt->files[cnt]->i_mapping;
1935
1936 ret = filemap_fdatawrite(mapping);
0abd675e 1937 if (ret)
af033b2a
CY		 1938 goto out;
1939
1940 /* if we are using journalled quota */
1941 if (is_journalled_quota(sbi))
1942 continue;
1943
1944 ret = filemap_fdatawait(mapping);
1945 if (ret)
1946 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
0abd675e
CY		 1947
1948 inode_lock(dqopt->files[cnt]);
1949 truncate_inode_pages(&dqopt->files[cnt]->i_data, 0);
1950 inode_unlock(dqopt->files[cnt]);
1951 }
af033b2a
CY		 1952out:
1953 if (ret)
1954 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
1955 return ret;
0abd675e
CY		 1956}
1957
1958static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
1959 const struct path *path)
1960{
1961 struct inode *inode;
1962 int err;
1963
9a20d391 1964 err = f2fs_quota_sync(sb, type);
0abd675e
CY		 1965 if (err)
1966 return err;
1967
1968 err = dquot_quota_on(sb, type, format_id, path);
1969 if (err)
1970 return err;
1971
1972 inode = d_inode(path->dentry);
1973
1974 inode_lock(inode);
59c84408 1975 F2FS_I(inode)->i_flags |= F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL;
9149a5eb 1976 f2fs_set_inode_flags(inode);
0abd675e
CY		 1977 inode_unlock(inode);
1978 f2fs_mark_inode_dirty_sync(inode, false);
1979
1980 return 0;
1981}
1982
1983static int f2fs_quota_off(struct super_block *sb, int type)
1984{
1985 struct inode *inode = sb_dqopt(sb)->files[type];
1986 int err;
1987
1988 if (!inode || !igrab(inode))
1989 return dquot_quota_off(sb, type);
1990
cda9cc59
YH		 1991 err = f2fs_quota_sync(sb, type);
1992 if (err)
1993 goto out_put;
0abd675e
CY		 1994
1995 err = dquot_quota_off(sb, type);
7beb01f7 1996 if (err || f2fs_sb_has_quota_ino(F2FS_SB(sb)))
0abd675e
CY		 1997 goto out_put;
1998
1999 inode_lock(inode);
59c84408 2000 F2FS_I(inode)->i_flags &= ~(F2FS_NOATIME_FL | F2FS_IMMUTABLE_FL);
9149a5eb 2001 f2fs_set_inode_flags(inode);
0abd675e
CY		 2002 inode_unlock(inode);
2003 f2fs_mark_inode_dirty_sync(inode, false);
2004out_put:
2005 iput(inode);
2006 return err;
2007}
2008
4b2414d0 2009void f2fs_quota_off_umount(struct super_block *sb)
0abd675e
CY		 2010{
2011 int type;
cda9cc59
YH		 2012 int err;
2013
2014 for (type = 0; type < MAXQUOTAS; type++) {
2015 err = f2fs_quota_off(sb, type);
2016 if (err) {
2017 int ret = dquot_quota_off(sb, type);
0abd675e 2018
cda9cc59
YH		 2019 f2fs_msg(sb, KERN_ERR,
2020 "Fail to turn off disk quota "
2021 "(type: %d, err: %d, ret:%d), Please "
2022 "run fsck to fix it.", type, err, ret);
af033b2a 2023 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
cda9cc59
YH		 2024 }
2025 }
0abd675e
CY		 2026}
2027
26b5a079
SY		 2028static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
2029{
2030 struct quota_info *dqopt = sb_dqopt(sb);
2031 int type;
2032
2033 for (type = 0; type < MAXQUOTAS; type++) {
2034 if (!dqopt->files[type])
2035 continue;
2036 f2fs_inode_synced(dqopt->files[type]);
2037 }
2038}
2039
af033b2a
CY		 2040static int f2fs_dquot_commit(struct dquot *dquot)
2041{
2042 int ret;
2043
2044 ret = dquot_commit(dquot);
2045 if (ret < 0)
2046 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2047 return ret;
2048}
2049
2050static int f2fs_dquot_acquire(struct dquot *dquot)
2051{
2052 int ret;
2053
2054 ret = dquot_acquire(dquot);
2055 if (ret < 0)
2056 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2057
2058 return ret;
2059}
2060
2061static int f2fs_dquot_release(struct dquot *dquot)
2062{
2063 int ret;
2064
2065 ret = dquot_release(dquot);
2066 if (ret < 0)
2067 set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
2068 return ret;
2069}
2070
2071static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
2072{
2073 struct super_block *sb = dquot->dq_sb;
2074 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2075 int ret;
2076
2077 ret = dquot_mark_dquot_dirty(dquot);
2078
2079 /* if we are using journalled quota */
2080 if (is_journalled_quota(sbi))
2081 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
2082
2083 return ret;
2084}
2085
2086static int f2fs_dquot_commit_info(struct super_block *sb, int type)
2087{
2088 int ret;
2089
2090 ret = dquot_commit_info(sb, type);
2091 if (ret < 0)
2092 set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
2093 return ret;
2094}
26b5a079 2095
94b1e10e 2096static int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
5c57132e
CY		 2097{
2098 *projid = F2FS_I(inode)->i_projid;
2099 return 0;
2100}
2101
0abd675e
CY		 2102static const struct dquot_operations f2fs_quota_operations = {
2103 .get_reserved_space = f2fs_get_reserved_space,
af033b2a
CY		 2104 .write_dquot = f2fs_dquot_commit,
2105 .acquire_dquot = f2fs_dquot_acquire,
2106 .release_dquot = f2fs_dquot_release,
2107 .mark_dirty = f2fs_dquot_mark_dquot_dirty,
2108 .write_info = f2fs_dquot_commit_info,
0abd675e
CY		 2109 .alloc_dquot = dquot_alloc,
2110 .destroy_dquot = dquot_destroy,
5c57132e 2111 .get_projid = f2fs_get_projid,
0abd675e
CY		 2112 .get_next_id = dquot_get_next_id,
2113};
2114
2115static const struct quotactl_ops f2fs_quotactl_ops = {
2116 .quota_on = f2fs_quota_on,
2117 .quota_off = f2fs_quota_off,
2118 .quota_sync = f2fs_quota_sync,
2119 .get_state = dquot_get_state,
2120 .set_info = dquot_set_dqinfo,
2121 .get_dqblk = dquot_get_dqblk,
2122 .set_dqblk = dquot_set_dqblk,
2123 .get_nextdqblk = dquot_get_next_dqblk,
2124};
2125#else
af033b2a
CY		 2126int f2fs_quota_sync(struct super_block *sb, int type)
2127{
2128 return 0;
2129}
2130
4b2414d0 2131void f2fs_quota_off_umount(struct super_block *sb)
0abd675e
CY		 2132{
2133}
2134#endif
2135
f62fc9f9 2136static const struct super_operations f2fs_sops = {
aff063e2 2137 .alloc_inode = f2fs_alloc_inode,
531ad7d5 2138 .drop_inode = f2fs_drop_inode,
aff063e2
JK		 2139 .destroy_inode = f2fs_destroy_inode,
2140 .write_inode = f2fs_write_inode,
b3783873 2141 .dirty_inode = f2fs_dirty_inode,
aff063e2 2142 .show_options = f2fs_show_options,
0abd675e
CY		 2143#ifdef CONFIG_QUOTA
2144 .quota_read = f2fs_quota_read,
2145 .quota_write = f2fs_quota_write,
2146 .get_dquots = f2fs_get_dquots,
2147#endif
aff063e2
JK		 2148 .evict_inode = f2fs_evict_inode,
2149 .put_super = f2fs_put_super,
2150 .sync_fs = f2fs_sync_fs,
d6212a5f
CL		 2151 .freeze_fs = f2fs_freeze,
2152 .unfreeze_fs = f2fs_unfreeze,
aff063e2 2153 .statfs = f2fs_statfs,
696c018c 2154 .remount_fs = f2fs_remount,
aff063e2
JK		 2155};
2156
643fa961 2157#ifdef CONFIG_FS_ENCRYPTION
0b81d077
JK		 2158static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
2159{
2160 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2161 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2162 ctx, len, NULL);
2163}
2164
2165static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
2166 void *fs_data)
2167{
b7c409de
SY		 2168 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2169
2170 /*
2171 * Encrypting the root directory is not allowed because fsck
2172 * expects lost+found directory to exist and remain unencrypted
2173 * if LOST_FOUND feature is enabled.
2174 *
2175 */
7beb01f7 2176 if (f2fs_sb_has_lost_found(sbi) &&
b7c409de
SY		 2177 inode->i_ino == F2FS_ROOT_INO(sbi))
2178 return -EPERM;
2179
0b81d077
JK		 2180 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
2181 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
2182 ctx, len, fs_data, XATTR_CREATE);
2183}
2184
ff62af20
SY		 2185static bool f2fs_dummy_context(struct inode *inode)
2186{
2187 return DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(inode));
2188}
2189
6f69f0ed 2190static const struct fscrypt_operations f2fs_cryptops = {
a5d431ef 2191 .key_prefix = "f2fs:",
0b81d077
JK		 2192 .get_context = f2fs_get_context,
2193 .set_context = f2fs_set_context,
ff62af20 2194 .dummy_context = f2fs_dummy_context,
0b81d077 2195 .empty_dir = f2fs_empty_dir,
e12ee683 2196 .max_namelen = F2FS_NAME_LEN,
0b81d077 2197};
0b81d077
JK		 2198#endif
2199
aff063e2
JK		 2200static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
2201 u64 ino, u32 generation)
2202{
2203 struct f2fs_sb_info *sbi = F2FS_SB(sb);
2204 struct inode *inode;
2205
4d57b86d 2206 if (f2fs_check_nid_range(sbi, ino))
910bb12d 2207 return ERR_PTR(-ESTALE);
aff063e2
JK		 2208
2209 /*
2210 * f2fs_iget isn't quite right if the inode is currently unallocated!
2211 * However f2fs_iget currently does appropriate checks to handle stale
2212 * inodes so everything is OK.
2213 */
2214 inode = f2fs_iget(sb, ino);
2215 if (IS_ERR(inode))
2216 return ERR_CAST(inode);
6bacf52f 2217 if (unlikely(generation && inode->i_generation != generation)) {
aff063e2
JK		 2218 /* we didn't find the right inode.. */
2219 iput(inode);
2220 return ERR_PTR(-ESTALE);
2221 }
2222 return inode;
2223}
2224
2225static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
2226 int fh_len, int fh_type)
2227{
2228 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
2229 f2fs_nfs_get_inode);
2230}
2231
2232static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
2233 int fh_len, int fh_type)
2234{
2235 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
2236 f2fs_nfs_get_inode);
2237}
2238
2239static const struct export_operations f2fs_export_ops = {
2240 .fh_to_dentry = f2fs_fh_to_dentry,
2241 .fh_to_parent = f2fs_fh_to_parent,
2242 .get_parent = f2fs_get_parent,
2243};
2244
e0afc4d6 2245static loff_t max_file_blocks(void)
aff063e2 2246{
7a2af766 2247 loff_t result = 0;
aff063e2
JK		 2248 loff_t leaf_count = ADDRS_PER_BLOCK;
2249
7a2af766
CY		 2250 /*
2251 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
6afc662e 2252 * DEFAULT_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
7a2af766
CY		 2253 * space in inode.i_addr, it will be more safe to reassign
2254 * result as zero.
2255 */
2256
aff063e2
JK		 2257 /* two direct node blocks */
2258 result += (leaf_count * 2);
2259
2260 /* two indirect node blocks */
2261 leaf_count *= NIDS_PER_BLOCK;
2262 result += (leaf_count * 2);
2263
2264 /* one double indirect node block */
2265 leaf_count *= NIDS_PER_BLOCK;
2266 result += leaf_count;
2267
aff063e2
JK		 2268 return result;
2269}
2270
fd694733
JK		 2271static int __f2fs_commit_super(struct buffer_head *bh,
2272 struct f2fs_super_block *super)
2273{
2274 lock_buffer(bh);
2275 if (super)
2276 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
fd694733
JK		 2277 set_buffer_dirty(bh);
2278 unlock_buffer(bh);
2279
2280 /* it's rare case, we can do fua all the time */
3adc5fcb 2281 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
fd694733
JK		 2282}
2283
df728b0f 2284static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
fd694733 2285 struct buffer_head *bh)
9a59b62f 2286{
fd694733
JK		 2287 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2288 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 2289 struct super_block *sb = sbi->sb;
9a59b62f
CY		 2290 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
2291 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
2292 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
2293 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
2294 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
2295 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
2296 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
2297 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
2298 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
2299 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
2300 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2301 u32 segment_count = le32_to_cpu(raw_super->segment_count);
2302 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
fd694733
JK		 2303 u64 main_end_blkaddr = main_blkaddr +
2304 (segment_count_main << log_blocks_per_seg);
2305 u64 seg_end_blkaddr = segment0_blkaddr +
2306 (segment_count << log_blocks_per_seg);
9a59b62f
CY		 2307
2308 if (segment0_blkaddr != cp_blkaddr) {
2309 f2fs_msg(sb, KERN_INFO,
2310 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
2311 segment0_blkaddr, cp_blkaddr);
2312 return true;
2313 }
2314
2315 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
2316 sit_blkaddr) {
2317 f2fs_msg(sb, KERN_INFO,
2318 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
2319 cp_blkaddr, sit_blkaddr,
2320 segment_count_ckpt << log_blocks_per_seg);
2321 return true;
2322 }
2323
2324 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
2325 nat_blkaddr) {
2326 f2fs_msg(sb, KERN_INFO,
2327 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
2328 sit_blkaddr, nat_blkaddr,
2329 segment_count_sit << log_blocks_per_seg);
2330 return true;
2331 }
2332
2333 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
2334 ssa_blkaddr) {
2335 f2fs_msg(sb, KERN_INFO,
2336 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
2337 nat_blkaddr, ssa_blkaddr,
2338 segment_count_nat << log_blocks_per_seg);
2339 return true;
2340 }
2341
2342 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
2343 main_blkaddr) {
2344 f2fs_msg(sb, KERN_INFO,
2345 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
2346 ssa_blkaddr, main_blkaddr,
2347 segment_count_ssa << log_blocks_per_seg);
2348 return true;
2349 }
2350
fd694733 2351 if (main_end_blkaddr > seg_end_blkaddr) {
9a59b62f 2352 f2fs_msg(sb, KERN_INFO,
fd694733 2353 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
9a59b62f 2354 main_blkaddr,
fd694733
JK		 2355 segment0_blkaddr +
2356 (segment_count << log_blocks_per_seg),
9a59b62f
CY		 2357 segment_count_main << log_blocks_per_seg);
2358 return true;
fd694733
JK		 2359 } else if (main_end_blkaddr < seg_end_blkaddr) {
2360 int err = 0;
2361 char *res;
2362
2363 /* fix in-memory information all the time */
2364 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
2365 segment0_blkaddr) >> log_blocks_per_seg);
2366
2367 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
df728b0f 2368 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
fd694733
JK		 2369 res = "internally";
2370 } else {
2371 err = __f2fs_commit_super(bh, NULL);
2372 res = err ? "failed" : "done";
2373 }
2374 f2fs_msg(sb, KERN_INFO,
2375 "Fix alignment : %s, start(%u) end(%u) block(%u)",
2376 res, main_blkaddr,
2377 segment0_blkaddr +
2378 (segment_count << log_blocks_per_seg),
2379 segment_count_main << log_blocks_per_seg);
2380 if (err)
2381 return true;
9a59b62f 2382 }
9a59b62f
CY		 2383 return false;
2384}
2385
df728b0f 2386static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
fd694733 2387 struct buffer_head *bh)
aff063e2 2388{
0cfe75c5
JK		 2389 block_t segment_count, segs_per_sec, secs_per_zone;
2390 block_t total_sections, blocks_per_seg;
fd694733
JK		 2391 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
2392 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 2393 struct super_block *sb = sbi->sb;
aff063e2 2394 unsigned int blocksize;
d440c52d
JZ		 2395 size_t crc_offset = 0;
2396 __u32 crc = 0;
2397
2398 /* Check checksum_offset and crc in superblock */
7beb01f7 2399 if (__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_SB_CHKSUM)) {
d440c52d
JZ		 2400 crc_offset = le32_to_cpu(raw_super->checksum_offset);
2401 if (crc_offset !=
2402 offsetof(struct f2fs_super_block, crc)) {
2403 f2fs_msg(sb, KERN_INFO,
2404 "Invalid SB checksum offset: %zu",
2405 crc_offset);
2406 return 1;
2407 }
2408 crc = le32_to_cpu(raw_super->crc);
2409 if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
2410 f2fs_msg(sb, KERN_INFO,
2411 "Invalid SB checksum value: %u", crc);
2412 return 1;
2413 }
2414 }
aff063e2 2415
a07ef784
NJ		 2416 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
2417 f2fs_msg(sb, KERN_INFO,
2418 "Magic Mismatch, valid(0x%x) - read(0x%x)",
2419 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
aff063e2 2420 return 1;
a07ef784 2421 }
aff063e2 2422
5c9b4692 2423 /* Currently, support only 4KB page cache size */
09cbfeaf 2424 if (F2FS_BLKSIZE != PAGE_SIZE) {
5c9b4692 2425 f2fs_msg(sb, KERN_INFO,
14d7e9de 2426 "Invalid page_cache_size (%lu), supports only 4KB\n",
09cbfeaf 2427 PAGE_SIZE);
5c9b4692 2428 return 1;
2429 }
2430
aff063e2
JK		 2431 /* Currently, support only 4KB block size */
2432 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
5c9b4692 2433 if (blocksize != F2FS_BLKSIZE) {
a07ef784
NJ		 2434 f2fs_msg(sb, KERN_INFO,
2435 "Invalid blocksize (%u), supports only 4KB\n",
2436 blocksize);
aff063e2 2437 return 1;
a07ef784 2438 }
5c9b4692 2439
9a59b62f
CY		 2440 /* check log blocks per segment */
2441 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
2442 f2fs_msg(sb, KERN_INFO,
2443 "Invalid log blocks per segment (%u)\n",
2444 le32_to_cpu(raw_super->log_blocks_per_seg));
2445 return 1;
2446 }
2447
55cf9cb6
CY		 2448 /* Currently, support 512/1024/2048/4096 bytes sector size */
2449 if (le32_to_cpu(raw_super->log_sectorsize) >
2450 F2FS_MAX_LOG_SECTOR_SIZE ||
2451 le32_to_cpu(raw_super->log_sectorsize) <
2452 F2FS_MIN_LOG_SECTOR_SIZE) {
2453 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
2454 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 2455 return 1;
a07ef784 2456 }
55cf9cb6
CY		 2457 if (le32_to_cpu(raw_super->log_sectors_per_block) +
2458 le32_to_cpu(raw_super->log_sectorsize) !=
2459 F2FS_MAX_LOG_SECTOR_SIZE) {
2460 f2fs_msg(sb, KERN_INFO,
2461 "Invalid log sectors per block(%u) log sectorsize(%u)",
2462 le32_to_cpu(raw_super->log_sectors_per_block),
2463 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 2464 return 1;
a07ef784 2465 }
9a59b62f 2466
0cfe75c5
JK		 2467 segment_count = le32_to_cpu(raw_super->segment_count);
2468 segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2469 secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2470 total_sections = le32_to_cpu(raw_super->section_count);
2471
2472 /* blocks_per_seg should be 512, given the above check */
2473 blocks_per_seg = 1 << le32_to_cpu(raw_super->log_blocks_per_seg);
2474
2475 if (segment_count > F2FS_MAX_SEGMENT ||
2476 segment_count < F2FS_MIN_SEGMENTS) {
2477 f2fs_msg(sb, KERN_INFO,
2478 "Invalid segment count (%u)",
2479 segment_count);
2480 return 1;
2481 }
2482
2483 if (total_sections > segment_count ||
2484 total_sections < F2FS_MIN_SEGMENTS ||
2485 segs_per_sec > segment_count || !segs_per_sec) {
2486 f2fs_msg(sb, KERN_INFO,
2487 "Invalid segment/section count (%u, %u x %u)",
2488 segment_count, total_sections, segs_per_sec);
2489 return 1;
2490 }
2491
2492 if ((segment_count / segs_per_sec) < total_sections) {
2493 f2fs_msg(sb, KERN_INFO,
2494 "Small segment_count (%u < %u * %u)",
2495 segment_count, segs_per_sec, total_sections);
2496 return 1;
2497 }
2498
88960068 2499 if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
0cfe75c5 2500 f2fs_msg(sb, KERN_INFO,
88960068
MB		 2501 "Wrong segment_count / block_count (%u > %llu)",
2502 segment_count, le64_to_cpu(raw_super->block_count));
0cfe75c5
JK		 2503 return 1;
2504 }
2505
42bf546c 2506 if (secs_per_zone > total_sections || !secs_per_zone) {
0cfe75c5 2507 f2fs_msg(sb, KERN_INFO,
42bf546c 2508 "Wrong secs_per_zone / total_sections (%u, %u)",
0cfe75c5
JK		 2509 secs_per_zone, total_sections);
2510 return 1;
2511 }
2512 if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
2513 raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
2514 (le32_to_cpu(raw_super->extension_count) +
2515 raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
2516 f2fs_msg(sb, KERN_INFO,
2517 "Corrupted extension count (%u + %u > %u)",
2518 le32_to_cpu(raw_super->extension_count),
2519 raw_super->hot_ext_count,
2520 F2FS_MAX_EXTENSION);
2521 return 1;
2522 }
2523
2524 if (le32_to_cpu(raw_super->cp_payload) >
2525 (blocks_per_seg - F2FS_CP_PACKS)) {
2526 f2fs_msg(sb, KERN_INFO,
2527 "Insane cp_payload (%u > %u)",
2528 le32_to_cpu(raw_super->cp_payload),
2529 blocks_per_seg - F2FS_CP_PACKS);
2530 return 1;
2531 }
2532
9a59b62f
CY		 2533 /* check reserved ino info */
2534 if (le32_to_cpu(raw_super->node_ino) != 1 ||
2535 le32_to_cpu(raw_super->meta_ino) != 2 ||
2536 le32_to_cpu(raw_super->root_ino) != 3) {
2537 f2fs_msg(sb, KERN_INFO,
2538 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
2539 le32_to_cpu(raw_super->node_ino),
2540 le32_to_cpu(raw_super->meta_ino),
2541 le32_to_cpu(raw_super->root_ino));
2542 return 1;
2543 }
2544
2545 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
df728b0f 2546 if (sanity_check_area_boundary(sbi, bh))
9a59b62f
CY		 2547 return 1;
2548
aff063e2
JK		 2549 return 0;
2550}
2551
4d57b86d 2552int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
aff063e2
JK		 2553{
2554 unsigned int total, fsmeta;
577e3495
JK		 2555 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
2556 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2040fce8 2557 unsigned int ovp_segments, reserved_segments;
15d3042a 2558 unsigned int main_segs, blocks_per_seg;
c77ec61c
CY		 2559 unsigned int sit_segs, nat_segs;
2560 unsigned int sit_bitmap_size, nat_bitmap_size;
2561 unsigned int log_blocks_per_seg;
9dc956b2 2562 unsigned int segment_count_main;
e494c2f9 2563 unsigned int cp_pack_start_sum, cp_payload;
9dc956b2 2564 block_t user_block_count;
042be0f8 2565 int i, j;
aff063e2
JK		 2566
2567 total = le32_to_cpu(raw_super->segment_count);
2568 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
c77ec61c
CY		 2569 sit_segs = le32_to_cpu(raw_super->segment_count_sit);
2570 fsmeta += sit_segs;
2571 nat_segs = le32_to_cpu(raw_super->segment_count_nat);
2572 fsmeta += nat_segs;
aff063e2
JK		 2573 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
2574 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
2575
6bacf52f 2576 if (unlikely(fsmeta >= total))
aff063e2 2577 return 1;
577e3495 2578
2040fce8
JK		 2579 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
2580 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
2581
2582 if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
2583 ovp_segments == 0 || reserved_segments == 0)) {
2584 f2fs_msg(sbi->sb, KERN_ERR,
2585 "Wrong layout: check mkfs.f2fs version");
2586 return 1;
2587 }
2588
9dc956b2
CY		 2589 user_block_count = le64_to_cpu(ckpt->user_block_count);
2590 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
2591 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2592 if (!user_block_count || user_block_count >=
2593 segment_count_main << log_blocks_per_seg) {
2594 f2fs_msg(sbi->sb, KERN_ERR,
2595 "Wrong user_block_count: %u", user_block_count);
2596 return 1;
2597 }
2598
15d3042a
JQ		 2599 main_segs = le32_to_cpu(raw_super->segment_count_main);
2600 blocks_per_seg = sbi->blocks_per_seg;
2601
2602 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2603 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
2604 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
2605 return 1;
042be0f8
CY		 2606 for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
2607 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2608 le32_to_cpu(ckpt->cur_node_segno[j])) {
2609 f2fs_msg(sbi->sb, KERN_ERR,
2610 "Node segment (%u, %u) has the same "
2611 "segno: %u", i, j,
2612 le32_to_cpu(ckpt->cur_node_segno[i]));
2613 return 1;
2614 }
2615 }
15d3042a
JQ		 2616 }
2617 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
2618 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
2619 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
2620 return 1;
042be0f8
CY		 2621 for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
2622 if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
2623 le32_to_cpu(ckpt->cur_data_segno[j])) {
2624 f2fs_msg(sbi->sb, KERN_ERR,
2625 "Data segment (%u, %u) has the same "
2626 "segno: %u", i, j,
2627 le32_to_cpu(ckpt->cur_data_segno[i]));
2628 return 1;
2629 }
2630 }
2631 }
2632 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
2633 for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
2634 if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
2635 le32_to_cpu(ckpt->cur_data_segno[j])) {
2636 f2fs_msg(sbi->sb, KERN_ERR,
2637 "Data segment (%u) and Data segment (%u)"
2638 " has the same segno: %u", i, j,
2639 le32_to_cpu(ckpt->cur_node_segno[i]));
2640 return 1;
2641 }
2642 }
15d3042a
JQ		 2643 }
2644
c77ec61c
CY		 2645 sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize);
2646 nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize);
c77ec61c
CY		 2647
2648 if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
2649 nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
2650 f2fs_msg(sbi->sb, KERN_ERR,
2651 "Wrong bitmap size: sit: %u, nat:%u",
2652 sit_bitmap_size, nat_bitmap_size);
2653 return 1;
2654 }
e494c2f9
CY		 2655
2656 cp_pack_start_sum = __start_sum_addr(sbi);
2657 cp_payload = __cp_payload(sbi);
2658 if (cp_pack_start_sum < cp_payload + 1 ||
2659 cp_pack_start_sum > blocks_per_seg - 1 -
2660 NR_CURSEG_TYPE) {
2661 f2fs_msg(sbi->sb, KERN_ERR,
2662 "Wrong cp_pack_start_sum: %u",
2663 cp_pack_start_sum);
2664 return 1;
2665 }
c77ec61c 2666
1e968fdf 2667 if (unlikely(f2fs_cp_error(sbi))) {
577e3495
JK		 2668 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
2669 return 1;
2670 }
aff063e2
JK		 2671 return 0;
2672}
2673
2674static void init_sb_info(struct f2fs_sb_info *sbi)
2675{
2676 struct f2fs_super_block *raw_super = sbi->raw_super;
089842de 2677 int i;
aff063e2
JK		 2678
2679 sbi->log_sectors_per_block =
2680 le32_to_cpu(raw_super->log_sectors_per_block);
2681 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
2682 sbi->blocksize = 1 << sbi->log_blocksize;
2683 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
2684 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
2685 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
2686 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
2687 sbi->total_sections = le32_to_cpu(raw_super->section_count);
2688 sbi->total_node_count =
2689 (le32_to_cpu(raw_super->segment_count_nat) / 2)
2690 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
2691 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
2692 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
2693 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
5ec4e49f 2694 sbi->cur_victim_sec = NULL_SECNO;
e3080b01
CY		 2695 sbi->next_victim_seg[BG_GC] = NULL_SEGNO;
2696 sbi->next_victim_seg[FG_GC] = NULL_SEGNO;
b1c57c1c 2697 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
e3080b01 2698 sbi->migration_granularity = sbi->segs_per_sec;
aff063e2 2699
ab9fa662 2700 sbi->dir_level = DEF_DIR_LEVEL;
6beceb54 2701 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
d0239e1b 2702 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
a7d10cf3
ST		 2703 sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
2704 sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
4354994f 2705 sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
caf0047e 2706 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2658e50d 2707
35782b23
JK		 2708 for (i = 0; i < NR_COUNT_TYPE; i++)
2709 atomic_set(&sbi->nr_pages[i], 0);
2710
c29fd0c0
CY		 2711 for (i = 0; i < META; i++)
2712 atomic_set(&sbi->wb_sync_req[i], 0);
687de7f1 2713
2658e50d
JK		 2714 INIT_LIST_HEAD(&sbi->s_list);
2715 mutex_init(&sbi->umount_mutex);
107a805d 2716 init_rwsem(&sbi->io_order_lock);
aaec2b1d 2717 spin_lock_init(&sbi->cp_lock);
1228b482
CY		 2718
2719 sbi->dirty_device = 0;
2720 spin_lock_init(&sbi->dev_lock);
d0d3f1b3 2721
846ae671 2722 init_rwsem(&sbi->sb_lock);
aff063e2
JK		 2723}
2724
523be8a6
JK		 2725static int init_percpu_info(struct f2fs_sb_info *sbi)
2726{
35782b23 2727 int err;
41382ec4 2728
513c5f37
JK		 2729 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
2730 if (err)
2731 return err;
2732
4a70e255 2733 err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
41382ec4 2734 GFP_KERNEL);
4a70e255
CY		 2735 if (err)
2736 percpu_counter_destroy(&sbi->alloc_valid_block_count);
2737
2738 return err;
523be8a6
JK		 2739}
2740
178053e2 2741#ifdef CONFIG_BLK_DEV_ZONED
3c62be17 2742static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
178053e2 2743{
3c62be17 2744 struct block_device *bdev = FDEV(devi).bdev;
178053e2
DLM		 2745 sector_t nr_sectors = bdev->bd_part->nr_sects;
2746 sector_t sector = 0;
2747 struct blk_zone *zones;
2748 unsigned int i, nr_zones;
2749 unsigned int n = 0;
2750 int err = -EIO;
2751
7beb01f7 2752 if (!f2fs_sb_has_blkzoned(sbi))
178053e2
DLM		 2753 return 0;
2754
3c62be17 2755 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
f99e8648 2756 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3c62be17 2757 return -EINVAL;
f99e8648 2758 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3c62be17
JK		 2759 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
2760 __ilog2_u32(sbi->blocks_per_blkz))
2761 return -EINVAL;
178053e2 2762 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3c62be17
JK		 2763 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
2764 sbi->log_blocks_per_blkz;
f99e8648 2765 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3c62be17 2766 FDEV(devi).nr_blkz++;
178053e2 2767
4e6aad29
CY		 2768 FDEV(devi).blkz_type = f2fs_kmalloc(sbi, FDEV(devi).nr_blkz,
2769 GFP_KERNEL);
3c62be17 2770 if (!FDEV(devi).blkz_type)
178053e2
DLM		 2771 return -ENOMEM;
2772
2773#define F2FS_REPORT_NR_ZONES 4096
2774
026f0507
KC		 2775 zones = f2fs_kzalloc(sbi,
2776 array_size(F2FS_REPORT_NR_ZONES,
2777 sizeof(struct blk_zone)),
2778 GFP_KERNEL);
178053e2
DLM		 2779 if (!zones)
2780 return -ENOMEM;
2781
2782 /* Get block zones type */
2783 while (zones && sector < nr_sectors) {
2784
2785 nr_zones = F2FS_REPORT_NR_ZONES;
2786 err = blkdev_report_zones(bdev, sector,
2787 zones, &nr_zones,
2788 GFP_KERNEL);
2789 if (err)
2790 break;
2791 if (!nr_zones) {
2792 err = -EIO;
2793 break;
2794 }
2795
2796 for (i = 0; i < nr_zones; i++) {
3c62be17 2797 FDEV(devi).blkz_type[n] = zones[i].type;
178053e2
DLM		 2798 sector += zones[i].len;
2799 n++;
2800 }
2801 }
2802
5222595d 2803 kvfree(zones);
178053e2
DLM		 2804
2805 return err;
2806}
2807#endif
2808
9076a75f
GZ		 2809/*
2810 * Read f2fs raw super block.
2b39e907
SL		 2811 * Because we have two copies of super block, so read both of them
2812 * to get the first valid one. If any one of them is broken, we pass
2813 * them recovery flag back to the caller.
9076a75f 2814 */
df728b0f 2815static int read_raw_super_block(struct f2fs_sb_info *sbi,
9076a75f 2816 struct f2fs_super_block **raw_super,
e8240f65 2817 int *valid_super_block, int *recovery)
14d7e9de 2818{
df728b0f 2819 struct super_block *sb = sbi->sb;
2b39e907 2820 int block;
e8240f65 2821 struct buffer_head *bh;
fd694733 2822 struct f2fs_super_block *super;
da554e48 2823 int err = 0;
14d7e9de 2824
b39f0de2
YH		 2825 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
2826 if (!super)
2827 return -ENOMEM;
2b39e907
SL		 2828
2829 for (block = 0; block < 2; block++) {
2830 bh = sb_bread(sb, block);
2831 if (!bh) {
2832 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
9076a75f 2833 block + 1);
2b39e907
SL		 2834 err = -EIO;
2835 continue;
2836 }
14d7e9de 2837
2b39e907 2838 /* sanity checking of raw super */
df728b0f 2839 if (sanity_check_raw_super(sbi, bh)) {
2b39e907
SL		 2840 f2fs_msg(sb, KERN_ERR,
2841 "Can't find valid F2FS filesystem in %dth superblock",
2842 block + 1);
2843 err = -EINVAL;
2844 brelse(bh);
2845 continue;
2846 }
14d7e9de 2847
2b39e907 2848 if (!*raw_super) {
fd694733
JK		 2849 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
2850 sizeof(*super));
2b39e907
SL		 2851 *valid_super_block = block;
2852 *raw_super = super;
2853 }
2854 brelse(bh);
da554e48 2855 }
2856
2b39e907
SL		 2857 /* Fail to read any one of the superblocks*/
2858 if (err < 0)
2859 *recovery = 1;
da554e48 2860
da554e48 2861 /* No valid superblock */
2b39e907 2862 if (!*raw_super)
5222595d 2863 kvfree(super);
2b39e907
SL		 2864 else
2865 err = 0;
da554e48 2866
2b39e907 2867 return err;
14d7e9de 2868}
2869
fd694733 2870int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
26d815ad 2871{
5d909cdb 2872 struct buffer_head *bh;
d440c52d 2873 __u32 crc = 0;
26d815ad
JK		 2874 int err;
2875
df728b0f
JK		 2876 if ((recover && f2fs_readonly(sbi->sb)) ||
2877 bdev_read_only(sbi->sb->s_bdev)) {
2878 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
f2353d7b 2879 return -EROFS;
df728b0f 2880 }
f2353d7b 2881
d440c52d 2882 /* we should update superblock crc here */
7beb01f7 2883 if (!recover && f2fs_sb_has_sb_chksum(sbi)) {
d440c52d
JZ		 2884 crc = f2fs_crc32(sbi, F2FS_RAW_SUPER(sbi),
2885 offsetof(struct f2fs_super_block, crc));
2886 F2FS_RAW_SUPER(sbi)->crc = cpu_to_le32(crc);
2887 }
2888
fd694733 2889 /* write back-up superblock first */
0964fc1a 2890 bh = sb_bread(sbi->sb, sbi->valid_super_block ? 0 : 1);
5d909cdb
JK		 2891 if (!bh)
2892 return -EIO;
fd694733 2893 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
5d909cdb 2894 brelse(bh);
c5bda1c8
CY		 2895
2896 /* if we are in recovery path, skip writing valid superblock */
2897 if (recover || err)
5d909cdb 2898 return err;
26d815ad
JK		 2899
2900 /* write current valid superblock */
0964fc1a 2901 bh = sb_bread(sbi->sb, sbi->valid_super_block);
fd694733
JK		 2902 if (!bh)
2903 return -EIO;
2904 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
2905 brelse(bh);
2906 return err;
26d815ad
JK		 2907}
2908
3c62be17
JK		 2909static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
2910{
2911 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
7bb3a371 2912 unsigned int max_devices = MAX_DEVICES;
3c62be17
JK		 2913 int i;
2914
7bb3a371
MS		 2915 /* Initialize single device information */
2916 if (!RDEV(0).path[0]) {
2917 if (!bdev_is_zoned(sbi->sb->s_bdev))
3c62be17 2918 return 0;
7bb3a371
MS		 2919 max_devices = 1;
2920 }
3c62be17 2921
7bb3a371
MS		 2922 /*
2923 * Initialize multiple devices information, or single
2924 * zoned block device information.
2925 */
026f0507
KC		 2926 sbi->devs = f2fs_kzalloc(sbi,
2927 array_size(max_devices,
2928 sizeof(struct f2fs_dev_info)),
2929 GFP_KERNEL);
7bb3a371
MS		 2930 if (!sbi->devs)
2931 return -ENOMEM;
3c62be17 2932
7bb3a371 2933 for (i = 0; i < max_devices; i++) {
3c62be17 2934
7bb3a371
MS		 2935 if (i > 0 && !RDEV(i).path[0])
2936 break;
2937
2938 if (max_devices == 1) {
2939 /* Single zoned block device mount */
2940 FDEV(0).bdev =
2941 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3c62be17 2942 sbi->sb->s_mode, sbi->sb->s_type);
7bb3a371
MS		 2943 } else {
2944 /* Multi-device mount */
2945 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
2946 FDEV(i).total_segments =
2947 le32_to_cpu(RDEV(i).total_segments);
2948 if (i == 0) {
2949 FDEV(i).start_blk = 0;
2950 FDEV(i).end_blk = FDEV(i).start_blk +
2951 (FDEV(i).total_segments <<
2952 sbi->log_blocks_per_seg) - 1 +
2953 le32_to_cpu(raw_super->segment0_blkaddr);
2954 } else {
2955 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
2956 FDEV(i).end_blk = FDEV(i).start_blk +
2957 (FDEV(i).total_segments <<
2958 sbi->log_blocks_per_seg) - 1;
2959 }
2960 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3c62be17 2961 sbi->sb->s_mode, sbi->sb->s_type);
7bb3a371 2962 }
3c62be17
JK		 2963 if (IS_ERR(FDEV(i).bdev))
2964 return PTR_ERR(FDEV(i).bdev);
2965
2966 /* to release errored devices */
2967 sbi->s_ndevs = i + 1;
2968
2969#ifdef CONFIG_BLK_DEV_ZONED
2970 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
7beb01f7 2971 !f2fs_sb_has_blkzoned(sbi)) {
3c62be17
JK		 2972 f2fs_msg(sbi->sb, KERN_ERR,
2973 "Zoned block device feature not enabled\n");
2974 return -EINVAL;
2975 }
2976 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
2977 if (init_blkz_info(sbi, i)) {
2978 f2fs_msg(sbi->sb, KERN_ERR,
2979 "Failed to initialize F2FS blkzone information");
2980 return -EINVAL;
2981 }
7bb3a371
MS		 2982 if (max_devices == 1)
2983 break;
3c62be17
JK		 2984 f2fs_msg(sbi->sb, KERN_INFO,
2985 "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
2986 i, FDEV(i).path,
2987 FDEV(i).total_segments,
2988 FDEV(i).start_blk, FDEV(i).end_blk,
2989 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
2990 "Host-aware" : "Host-managed");
2991 continue;
2992 }
2993#endif
2994 f2fs_msg(sbi->sb, KERN_INFO,
2995 "Mount Device [%2d]: %20s, %8u, %8x - %8x",
2996 i, FDEV(i).path,
2997 FDEV(i).total_segments,
2998 FDEV(i).start_blk, FDEV(i).end_blk);
2999 }
0a595eba
JK		 3000 f2fs_msg(sbi->sb, KERN_INFO,
3001 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3c62be17
JK		 3002 return 0;
3003}
3004
84b89e5d
JK		 3005static void f2fs_tuning_parameters(struct f2fs_sb_info *sbi)
3006{
3007 struct f2fs_sm_info *sm_i = SM_I(sbi);
3008
3009 /* adjust parameters according to the volume size */
3010 if (sm_i->main_segments <= SMALL_VOLUME_SEGMENTS) {
63189b78 3011 F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_REUSE;
84b89e5d
JK		 3012 sm_i->dcc_info->discard_granularity = 1;
3013 sm_i->ipu_policy = 1 << F2FS_IPU_FORCE;
3014 }
4cac90d5
CY		 3015
3016 sbi->readdir_ra = 1;
84b89e5d
JK		 3017}
3018
aff063e2
JK		 3019static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
3020{
3021 struct f2fs_sb_info *sbi;
da554e48 3022 struct f2fs_super_block *raw_super;
aff063e2 3023 struct inode *root;
99e3e858 3024 int err;
2adc3505 3025 bool retry = true, need_fsck = false;
dabc4a5c 3026 char *options = NULL;
e8240f65 3027 int recovery, i, valid_super_block;
8f1dbbbb 3028 struct curseg_info *seg_i;
aff063e2 3029
ed2e621a 3030try_onemore:
da554e48 3031 err = -EINVAL;
3032 raw_super = NULL;
e8240f65 3033 valid_super_block = -1;
da554e48 3034 recovery = 0;
3035
aff063e2
JK		 3036 /* allocate memory for f2fs-specific super block info */
3037 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
3038 if (!sbi)
3039 return -ENOMEM;
3040
df728b0f
JK		 3041 sbi->sb = sb;
3042
43b6573b
KM		 3043 /* Load the checksum driver */
3044 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
3045 if (IS_ERR(sbi->s_chksum_driver)) {
3046 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
3047 err = PTR_ERR(sbi->s_chksum_driver);
3048 sbi->s_chksum_driver = NULL;
3049 goto free_sbi;
3050 }
3051
ff9234ad 3052 /* set a block size */
6bacf52f 3053 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
a07ef784 3054 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
aff063e2 3055 goto free_sbi;
a07ef784 3056 }
aff063e2 3057
df728b0f 3058 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
e8240f65 3059 &recovery);
9076a75f
GZ		 3060 if (err)
3061 goto free_sbi;
3062
5fb08372 3063 sb->s_fs_info = sbi;
52763a4b
JK		 3064 sbi->raw_super = raw_super;
3065
704956ec 3066 /* precompute checksum seed for metadata */
7beb01f7 3067 if (f2fs_sb_has_inode_chksum(sbi))
704956ec
CY		 3068 sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
3069 sizeof(raw_super->uuid));
3070
d1b959c8
DLM		 3071 /*
3072 * The BLKZONED feature indicates that the drive was formatted with
3073 * zone alignment optimization. This is optional for host-aware
3074 * devices, but mandatory for host-managed zoned block devices.
3075 */
3076#ifndef CONFIG_BLK_DEV_ZONED
7beb01f7 3077 if (f2fs_sb_has_blkzoned(sbi)) {
d1b959c8
DLM		 3078 f2fs_msg(sb, KERN_ERR,
3079 "Zoned block device support is not enabled\n");
1727f317 3080 err = -EOPNOTSUPP;
d1b959c8
DLM		 3081 goto free_sb_buf;
3082 }
d1b959c8 3083#endif
498c5e9f 3084 default_options(sbi);
aff063e2 3085 /* parse mount options */
dabc4a5c
JK		 3086 options = kstrdup((const char *)data, GFP_KERNEL);
3087 if (data && !options) {
3088 err = -ENOMEM;
aff063e2 3089 goto free_sb_buf;
dabc4a5c
JK		 3090 }
3091
3092 err = parse_options(sb, options);
3093 if (err)
3094 goto free_options;
aff063e2 3095
e0afc4d6
CY		 3096 sbi->max_file_blocks = max_file_blocks();
3097 sb->s_maxbytes = sbi->max_file_blocks <<
3098 le32_to_cpu(raw_super->log_blocksize);
aff063e2
JK		 3099 sb->s_max_links = F2FS_LINK_MAX;
3100 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
3101
0abd675e
CY		 3102#ifdef CONFIG_QUOTA
3103 sb->dq_op = &f2fs_quota_operations;
7beb01f7 3104 if (f2fs_sb_has_quota_ino(sbi))
ea676733
JK		 3105 sb->s_qcop = &dquot_quotactl_sysfile_ops;
3106 else
3107 sb->s_qcop = &f2fs_quotactl_ops;
5c57132e 3108 sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
292c196a 3109
7beb01f7 3110 if (f2fs_sb_has_quota_ino(sbi)) {
292c196a
CY		 3111 for (i = 0; i < MAXQUOTAS; i++) {
3112 if (f2fs_qf_ino(sbi->sb, i))
3113 sbi->nquota_files++;
3114 }
3115 }
0abd675e
CY		 3116#endif
3117
aff063e2 3118 sb->s_op = &f2fs_sops;
643fa961 3119#ifdef CONFIG_FS_ENCRYPTION
0b81d077 3120 sb->s_cop = &f2fs_cryptops;
ffcc4182 3121#endif
aff063e2
JK		 3122 sb->s_xattr = f2fs_xattr_handlers;
3123 sb->s_export_op = &f2fs_export_ops;
3124 sb->s_magic = F2FS_SUPER_MAGIC;
aff063e2 3125 sb->s_time_gran = 1;
1751e8a6
LT		 3126 sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
3127 (test_opt(sbi, POSIX_ACL) ? SB_POSIXACL : 0);
85787090 3128 memcpy(&sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
578c6478 3129 sb->s_iflags |= SB_I_CGROUPWB;
aff063e2
JK		 3130
3131 /* init f2fs-specific super block info */
e8240f65 3132 sbi->valid_super_block = valid_super_block;
aff063e2 3133 mutex_init(&sbi->gc_mutex);
853137ce 3134 mutex_init(&sbi->writepages);
aff063e2 3135 mutex_init(&sbi->cp_mutex);
b3582c68 3136 init_rwsem(&sbi->node_write);
59c9081b 3137 init_rwsem(&sbi->node_change);
315df839
JK		 3138
3139 /* disallow all the data/node/meta page writes */
3140 set_sbi_flag(sbi, SBI_POR_DOING);
aff063e2 3141 spin_lock_init(&sbi->stat_lock);
971767ca 3142
b0af6d49
CY		 3143 /* init iostat info */
3144 spin_lock_init(&sbi->iostat_lock);
3145 sbi->iostat_enable = false;
3146
458e6197 3147 for (i = 0; i < NR_PAGE_TYPE; i++) {
a912b54d
JK		 3148 int n = (i == META) ? 1: NR_TEMP_TYPE;
3149 int j;
3150
c8606593
KC		 3151 sbi->write_io[i] =
3152 f2fs_kmalloc(sbi,
3153 array_size(n,
3154 sizeof(struct f2fs_bio_info)),
3155 GFP_KERNEL);
b63def91
CJ		 3156 if (!sbi->write_io[i]) {
3157 err = -ENOMEM;
0b2103e8 3158 goto free_bio_info;
b63def91 3159 }
a912b54d
JK		 3160
3161 for (j = HOT; j < n; j++) {
3162 init_rwsem(&sbi->write_io[i][j].io_rwsem);
3163 sbi->write_io[i][j].sbi = sbi;
3164 sbi->write_io[i][j].bio = NULL;
fb830fc5
CY		 3165 spin_lock_init(&sbi->write_io[i][j].io_lock);
3166 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
a912b54d 3167 }
458e6197 3168 }
971767ca 3169
b873b798 3170 init_rwsem(&sbi->cp_rwsem);
fb51b5ef 3171 init_waitqueue_head(&sbi->cp_wait);
aff063e2
JK		 3172 init_sb_info(sbi);
3173
523be8a6
JK		 3174 err = init_percpu_info(sbi);
3175 if (err)
d7997e63 3176 goto free_bio_info;
523be8a6 3177
0a595eba
JK		 3178 if (F2FS_IO_SIZE(sbi) > 1) {
3179 sbi->write_io_dummy =
a3ebfe4f 3180 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
1727f317
CY		 3181 if (!sbi->write_io_dummy) {
3182 err = -ENOMEM;
d7997e63 3183 goto free_percpu;
1727f317 3184 }
0a595eba
JK		 3185 }
3186
aff063e2
JK		 3187 /* get an inode for meta space */
3188 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
3189 if (IS_ERR(sbi->meta_inode)) {
a07ef784 3190 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
aff063e2 3191 err = PTR_ERR(sbi->meta_inode);
0a595eba 3192 goto free_io_dummy;
aff063e2
JK		 3193 }
3194
4d57b86d 3195 err = f2fs_get_valid_checkpoint(sbi);
a07ef784
NJ		 3196 if (err) {
3197 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
aff063e2 3198 goto free_meta_inode;
a07ef784 3199 }
aff063e2 3200
af033b2a
CY		 3201 if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
3202 set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
3203
3c62be17
JK		 3204 /* Initialize device list */
3205 err = f2fs_scan_devices(sbi);
3206 if (err) {
3207 f2fs_msg(sb, KERN_ERR, "Failed to find devices");
3208 goto free_devices;
3209 }
3210
aff063e2
JK		 3211 sbi->total_valid_node_count =
3212 le32_to_cpu(sbi->ckpt->valid_node_count);
513c5f37
JK		 3213 percpu_counter_set(&sbi->total_valid_inode_count,
3214 le32_to_cpu(sbi->ckpt->valid_inode_count));
aff063e2
JK		 3215 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
3216 sbi->total_valid_block_count =
3217 le64_to_cpu(sbi->ckpt->valid_block_count);
3218 sbi->last_valid_block_count = sbi->total_valid_block_count;
daeb433e 3219 sbi->reserved_blocks = 0;
80d42145 3220 sbi->current_reserved_blocks = 0;
7e65be49 3221 limit_reserve_root(sbi);
41382ec4 3222
c227f912
CY		 3223 for (i = 0; i < NR_INODE_TYPE; i++) {
3224 INIT_LIST_HEAD(&sbi->inode_list[i]);
3225 spin_lock_init(&sbi->inode_lock[i]);
3226 }
aff063e2 3227
4d57b86d 3228 f2fs_init_extent_cache_info(sbi);
1dcc336b 3229
4d57b86d 3230 f2fs_init_ino_entry_info(sbi);
aff063e2 3231
50fa53ec
CY		 3232 f2fs_init_fsync_node_info(sbi);
3233
aff063e2 3234 /* setup f2fs internal modules */
4d57b86d 3235 err = f2fs_build_segment_manager(sbi);
a07ef784
NJ		 3236 if (err) {
3237 f2fs_msg(sb, KERN_ERR,
3238 "Failed to initialize F2FS segment manager");
aff063e2 3239 goto free_sm;
a07ef784 3240 }
4d57b86d 3241 err = f2fs_build_node_manager(sbi);
a07ef784
NJ		 3242 if (err) {
3243 f2fs_msg(sb, KERN_ERR,
3244 "Failed to initialize F2FS node manager");
aff063e2 3245 goto free_nm;
a07ef784 3246 }
aff063e2 3247
8f1dbbbb
SL		 3248 /* For write statistics */
3249 if (sb->s_bdev->bd_part)
3250 sbi->sectors_written_start =
dbae2c55
MC		 3251 (u64)part_stat_read(sb->s_bdev->bd_part,
3252 sectors[STAT_WRITE]);
8f1dbbbb
SL		 3253
3254 /* Read accumulated write IO statistics if exists */
3255 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
3256 if (__exist_node_summaries(sbi))
3257 sbi->kbytes_written =
b2dde6fc 3258 le64_to_cpu(seg_i->journal->info.kbytes_written);
8f1dbbbb 3259
4d57b86d 3260 f2fs_build_gc_manager(sbi);
aff063e2 3261
60aa4d55
ST		 3262 err = f2fs_build_stats(sbi);
3263 if (err)
3264 goto free_nm;
3265
aff063e2
JK		 3266 /* get an inode for node space */
3267 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
3268 if (IS_ERR(sbi->node_inode)) {
a07ef784 3269 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
aff063e2 3270 err = PTR_ERR(sbi->node_inode);
60aa4d55 3271 goto free_stats;
aff063e2
JK		 3272 }
3273
aff063e2
JK		 3274 /* read root inode and dentry */
3275 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
3276 if (IS_ERR(root)) {
a07ef784 3277 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
aff063e2 3278 err = PTR_ERR(root);
60aa4d55 3279 goto free_node_inode;
aff063e2 3280 }
bcbfbd60
CY		 3281 if (!S_ISDIR(root->i_mode) || !root->i_blocks ||
3282 !root->i_size || !root->i_nlink) {
9d847950 3283 iput(root);
8f99a946 3284 err = -EINVAL;
60aa4d55 3285 goto free_node_inode;
8f99a946 3286 }
aff063e2
JK		 3287
3288 sb->s_root = d_make_root(root); /* allocate root dentry */
3289 if (!sb->s_root) {
3290 err = -ENOMEM;
3291 goto free_root_inode;
3292 }
3293
dc6b2055 3294 err = f2fs_register_sysfs(sbi);
b59d0bae 3295 if (err)
a398101a 3296 goto free_root_inode;
b59d0bae 3297
ea676733 3298#ifdef CONFIG_QUOTA
76cf05d7 3299 /* Enable quota usage during mount */
7beb01f7 3300 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
ea676733 3301 err = f2fs_enable_quotas(sb);
730746ce 3302 if (err)
ea676733
JK		 3303 f2fs_msg(sb, KERN_ERR,
3304 "Cannot turn on quotas: error %d", err);
ea676733
JK		 3305 }
3306#endif
4b2414d0 3307 /* if there are nt orphan nodes free them */
4d57b86d 3308 err = f2fs_recover_orphan_inodes(sbi);
4b2414d0 3309 if (err)
ea676733 3310 goto free_meta;
4b2414d0 3311
4354994f
DR		 3312 if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
3313 goto skip_recovery;
3314
6437d1b0
JK		 3315 /* recover fsynced data */
3316 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
081d78c2
JK		 3317 /*
3318 * mount should be failed, when device has readonly mode, and
3319 * previous checkpoint was not done by clean system shutdown.
3320 */
3321 if (bdev_read_only(sb->s_bdev) &&
aaec2b1d 3322 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
081d78c2 3323 err = -EROFS;
4b2414d0 3324 goto free_meta;
081d78c2 3325 }
2adc3505
CY		 3326
3327 if (need_fsck)
3328 set_sbi_flag(sbi, SBI_NEED_FSCK);
3329
a468f0ef
JK		 3330 if (!retry)
3331 goto skip_recovery;
3332
4d57b86d 3333 err = f2fs_recover_fsync_data(sbi, false);
6781eabb 3334 if (err < 0) {
2adc3505 3335 need_fsck = true;
6437d1b0 3336 f2fs_msg(sb, KERN_ERR,
99e3e858 3337 "Cannot recover all fsync data errno=%d", err);
4b2414d0 3338 goto free_meta;
ed2e621a 3339 }
6781eabb 3340 } else {
4d57b86d 3341 err = f2fs_recover_fsync_data(sbi, true);
6781eabb
JK		 3342
3343 if (!f2fs_readonly(sb) && err > 0) {
3344 err = -EINVAL;
3345 f2fs_msg(sb, KERN_ERR,
3346 "Need to recover fsync data");
ea676733 3347 goto free_meta;
6781eabb 3348 }
6437d1b0 3349 }
a468f0ef 3350skip_recovery:
4d57b86d 3351 /* f2fs_recover_fsync_data() cleared this already */
315df839 3352 clear_sbi_flag(sbi, SBI_POR_DOING);
b59d0bae 3353
4354994f
DR		 3354 if (test_opt(sbi, DISABLE_CHECKPOINT)) {
3355 err = f2fs_disable_checkpoint(sbi);
3356 if (err)
3357 goto free_meta;
3358 } else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
3359 f2fs_enable_checkpoint(sbi);
3360 }
3361
6437d1b0
JK		 3362 /*
3363 * If filesystem is not mounted as read-only then
3364 * do start the gc_thread.
3365 */
6c029932 3366 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
6437d1b0 3367 /* After POR, we can run background GC thread.*/
4d57b86d 3368 err = f2fs_start_gc_thread(sbi);
6437d1b0 3369 if (err)
4b2414d0 3370 goto free_meta;
6437d1b0 3371 }
5222595d 3372 kvfree(options);
da554e48 3373
3374 /* recover broken superblock */
f2353d7b 3375 if (recovery) {
41214b3c
CY		 3376 err = f2fs_commit_super(sbi, true);
3377 f2fs_msg(sb, KERN_INFO,
99e3e858 3378 "Try to recover %dth superblock, ret: %d",
41214b3c 3379 sbi->valid_super_block ? 1 : 2, err);
da554e48 3380 }
3381
bae01eda
CY		 3382 f2fs_join_shrinker(sbi);
3383
84b89e5d
JK		 3384 f2fs_tuning_parameters(sbi);
3385
1200abb2
JK		 3386 f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
3387 cur_cp_version(F2FS_CKPT(sbi)));
6beceb54 3388 f2fs_update_time(sbi, CP_TIME);
d0239e1b 3389 f2fs_update_time(sbi, REQ_TIME);
aff063e2 3390 return 0;
6437d1b0 3391
4b2414d0 3392free_meta:
ea676733 3393#ifdef CONFIG_QUOTA
26b5a079 3394 f2fs_truncate_quota_inode_pages(sb);
7beb01f7 3395 if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb))
ea676733
JK		 3396 f2fs_quota_off_umount(sbi->sb);
3397#endif
4b2414d0 3398 /*
4d57b86d 3399 * Some dirty meta pages can be produced by f2fs_recover_orphan_inodes()
4b2414d0 3400 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
4d57b86d
CY		 3401 * followed by f2fs_write_checkpoint() through f2fs_write_node_pages(), which
3402 * falls into an infinite loop in f2fs_sync_meta_pages().
4b2414d0
CY		 3403 */
3404 truncate_inode_pages_final(META_MAPPING(sbi));
dc6b2055 3405 f2fs_unregister_sysfs(sbi);
aff063e2
JK		 3406free_root_inode:
3407 dput(sb->s_root);
3408 sb->s_root = NULL;
3409free_node_inode:
4d57b86d 3410 f2fs_release_ino_entry(sbi, true);
bae01eda 3411 truncate_inode_pages_final(NODE_MAPPING(sbi));
aff063e2 3412 iput(sbi->node_inode);
60aa4d55
ST		 3413free_stats:
3414 f2fs_destroy_stats(sbi);
aff063e2 3415free_nm:
4d57b86d 3416 f2fs_destroy_node_manager(sbi);
aff063e2 3417free_sm:
4d57b86d 3418 f2fs_destroy_segment_manager(sbi);
3c62be17
JK		 3419free_devices:
3420 destroy_device_list(sbi);
5222595d 3421 kvfree(sbi->ckpt);
aff063e2
JK		 3422free_meta_inode:
3423 make_bad_inode(sbi->meta_inode);
3424 iput(sbi->meta_inode);
0a595eba
JK		 3425free_io_dummy:
3426 mempool_destroy(sbi->write_io_dummy);
d7997e63
CY		 3427free_percpu:
3428 destroy_percpu_info(sbi);
3429free_bio_info:
a912b54d 3430 for (i = 0; i < NR_PAGE_TYPE; i++)
5222595d 3431 kvfree(sbi->write_io[i]);
d7997e63 3432free_options:
4b2414d0
CY		 3433#ifdef CONFIG_QUOTA
3434 for (i = 0; i < MAXQUOTAS; i++)
5222595d 3435 kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
4b2414d0 3436#endif
5222595d 3437 kvfree(options);
aff063e2 3438free_sb_buf:
5222595d 3439 kvfree(raw_super);
aff063e2 3440free_sbi:
43b6573b
KM		 3441 if (sbi->s_chksum_driver)
3442 crypto_free_shash(sbi->s_chksum_driver);
5222595d 3443 kvfree(sbi);
ed2e621a
JK		 3444
3445 /* give only one another chance */
3446 if (retry) {
9df47ba7 3447 retry = false;
ed2e621a
JK		 3448 shrink_dcache_sb(sb);
3449 goto try_onemore;
3450 }
aff063e2
JK		 3451 return err;
3452}
3453
3454static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
3455 const char *dev_name, void *data)
3456{
3457 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
3458}
3459
30a5537f
JK		 3460static void kill_f2fs_super(struct super_block *sb)
3461{
cce13252 3462 if (sb->s_root) {
1cb50f87
JK		 3463 struct f2fs_sb_info *sbi = F2FS_SB(sb);
3464
3465 set_sbi_flag(sbi, SBI_IS_CLOSE);
3466 f2fs_stop_gc_thread(sbi);
3467 f2fs_stop_discard_thread(sbi);
3468
3469 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
3470 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
3471 struct cp_control cpc = {
3472 .reason = CP_UMOUNT,
3473 };
3474 f2fs_write_checkpoint(sbi, &cpc);
3475 }
1378752b
CY		 3476
3477 if (is_sbi_flag_set(sbi, SBI_IS_RECOVERED) && f2fs_readonly(sb))
3478 sb->s_flags &= ~SB_RDONLY;
cce13252 3479 }
30a5537f
JK		 3480 kill_block_super(sb);
3481}
3482
aff063e2
JK		 3483static struct file_system_type f2fs_fs_type = {
3484 .owner = THIS_MODULE,
3485 .name = "f2fs",
3486 .mount = f2fs_mount,
30a5537f 3487 .kill_sb = kill_f2fs_super,
aff063e2
JK		 3488 .fs_flags = FS_REQUIRES_DEV,
3489};
7f78e035 3490MODULE_ALIAS_FS("f2fs");
aff063e2 3491
6e6093a8 3492static int __init init_inodecache(void)
aff063e2 3493{
5d097056
VD		 3494 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
3495 sizeof(struct f2fs_inode_info), 0,
3496 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
6bacf52f 3497 if (!f2fs_inode_cachep)
aff063e2
JK		 3498 return -ENOMEM;
3499 return 0;
3500}
3501
3502static void destroy_inodecache(void)
3503{
3504 /*
3505 * Make sure all delayed rcu free inodes are flushed before we
3506 * destroy cache.
3507 */
3508 rcu_barrier();
3509 kmem_cache_destroy(f2fs_inode_cachep);
3510}
3511
3512static int __init init_f2fs_fs(void)
3513{
3514 int err;
3515
4071e67c
AP		 3516 if (PAGE_SIZE != F2FS_BLKSIZE) {
3517 printk("F2FS not supported on PAGE_SIZE(%lu) != %d\n",
3518 PAGE_SIZE, F2FS_BLKSIZE);
3519 return -EINVAL;
3520 }
3521
c0508650
JK		 3522 f2fs_build_trace_ios();
3523
aff063e2
JK		 3524 err = init_inodecache();
3525 if (err)
3526 goto fail;
4d57b86d 3527 err = f2fs_create_node_manager_caches();
aff063e2 3528 if (err)
9890ff3f 3529 goto free_inodecache;
4d57b86d 3530 err = f2fs_create_segment_manager_caches();
aff063e2 3531 if (err)
9890ff3f 3532 goto free_node_manager_caches;
4d57b86d 3533 err = f2fs_create_checkpoint_caches();
aff063e2 3534 if (err)
06292073 3535 goto free_segment_manager_caches;
4d57b86d 3536 err = f2fs_create_extent_cache();
1dcc336b
CY		 3537 if (err)
3538 goto free_checkpoint_caches;
dc6b2055 3539 err = f2fs_init_sysfs();
a398101a 3540 if (err)
1dcc336b 3541 goto free_extent_cache;
2658e50d 3542 err = register_shrinker(&f2fs_shrinker_info);
cfc4d971 3543 if (err)
a398101a 3544 goto free_sysfs;
2658e50d
JK		 3545 err = register_filesystem(&f2fs_fs_type);
3546 if (err)
3547 goto free_shrinker;
787c7b8c
CY		 3548 err = f2fs_create_root_stats();
3549 if (err)
3550 goto free_filesystem;
6dbb1796
EB		 3551 err = f2fs_init_post_read_processing();
3552 if (err)
3553 goto free_root_stats;
9890ff3f
ZH		 3554 return 0;
3555
6dbb1796
EB		 3556free_root_stats:
3557 f2fs_destroy_root_stats();
787c7b8c
CY		 3558free_filesystem:
3559 unregister_filesystem(&f2fs_fs_type);
2658e50d
JK		 3560free_shrinker:
3561 unregister_shrinker(&f2fs_shrinker_info);
a398101a 3562free_sysfs:
dc6b2055 3563 f2fs_exit_sysfs();
1dcc336b 3564free_extent_cache:
4d57b86d 3565 f2fs_destroy_extent_cache();
9890ff3f 3566free_checkpoint_caches:
4d57b86d 3567 f2fs_destroy_checkpoint_caches();
7fd9e544 3568free_segment_manager_caches:
4d57b86d 3569 f2fs_destroy_segment_manager_caches();
9890ff3f 3570free_node_manager_caches:
4d57b86d 3571 f2fs_destroy_node_manager_caches();
9890ff3f
ZH		 3572free_inodecache:
3573 destroy_inodecache();
aff063e2
JK		 3574fail:
3575 return err;
3576}
3577
3578static void __exit exit_f2fs_fs(void)
3579{
6dbb1796 3580 f2fs_destroy_post_read_processing();
4589d25d 3581 f2fs_destroy_root_stats();
aff063e2 3582 unregister_filesystem(&f2fs_fs_type);
b8bef79d 3583 unregister_shrinker(&f2fs_shrinker_info);
dc6b2055 3584 f2fs_exit_sysfs();
4d57b86d
CY		 3585 f2fs_destroy_extent_cache();
3586 f2fs_destroy_checkpoint_caches();
3587 f2fs_destroy_segment_manager_caches();
3588 f2fs_destroy_node_manager_caches();
aff063e2 3589 destroy_inodecache();
351f4fba 3590 f2fs_destroy_trace_ios();
aff063e2
JK		 3591}
3592
3593module_init(init_f2fs_fs)
3594module_exit(exit_f2fs_fs)
3595
3596MODULE_AUTHOR("Samsung Electronics's Praesto Team");
3597MODULE_DESCRIPTION("Flash Friendly File System");
3598MODULE_LICENSE("GPL");
b4b9d34c 3599
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