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f2fs: drop duplicate header timer.h
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0a8165d7 1/*
aff063e2
JK		 2 * fs/f2fs/super.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/fs.h>
14#include <linux/statfs.h>
aff063e2
JK		 15#include <linux/buffer_head.h>
16#include <linux/backing-dev.h>
17#include <linux/kthread.h>
18#include <linux/parser.h>
19#include <linux/mount.h>
20#include <linux/seq_file.h>
5e176d54 21#include <linux/proc_fs.h>
aff063e2
JK		 22#include <linux/random.h>
23#include <linux/exportfs.h>
d3ee456d 24#include <linux/blkdev.h>
aff063e2 25#include <linux/f2fs_fs.h>
b59d0bae 26#include <linux/sysfs.h>
aff063e2
JK		 27
28#include "f2fs.h"
29#include "node.h"
5ec4e49f 30#include "segment.h"
aff063e2 31#include "xattr.h"
b59d0bae 32#include "gc.h"
db9f7c1a 33#include "trace.h"
aff063e2 34
a2a4a7e4
NJ		 35#define CREATE_TRACE_POINTS
36#include <trace/events/f2fs.h>
37
5e176d54 38static struct proc_dir_entry *f2fs_proc_root;
aff063e2 39static struct kmem_cache *f2fs_inode_cachep;
b59d0bae 40static struct kset *f2fs_kset;
aff063e2 41
73faec4d 42#ifdef CONFIG_F2FS_FAULT_INJECTION
2c63fead
JK		 43
44char *fault_name[FAULT_MAX] = {
45 [FAULT_KMALLOC] = "kmalloc",
c41f3cc3 46 [FAULT_PAGE_ALLOC] = "page alloc",
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",
8b038c70 52 [FAULT_IO] = "IO error",
0f348028 53 [FAULT_CHECKPOINT] = "checkpoint error",
2c63fead 54};
08796897 55
1ecc0c5c
CY		 56static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
57 unsigned int rate)
08796897 58{
1ecc0c5c
CY		 59 struct f2fs_fault_info *ffi = &sbi->fault_info;
60
08796897 61 if (rate) {
1ecc0c5c
CY		 62 atomic_set(&ffi->inject_ops, 0);
63 ffi->inject_rate = rate;
64 ffi->inject_type = (1 << FAULT_MAX) - 1;
08796897 65 } else {
1ecc0c5c 66 memset(ffi, 0, sizeof(struct f2fs_fault_info));
08796897
SY		 67 }
68}
73faec4d
JK		 69#endif
70
2658e50d
JK		 71/* f2fs-wide shrinker description */
72static struct shrinker f2fs_shrinker_info = {
73 .scan_objects = f2fs_shrink_scan,
74 .count_objects = f2fs_shrink_count,
75 .seeks = DEFAULT_SEEKS,
76};
77
aff063e2 78enum {
696c018c 79 Opt_gc_background,
aff063e2 80 Opt_disable_roll_forward,
2d834bf9 81 Opt_norecovery,
aff063e2 82 Opt_discard,
64058be9 83 Opt_nodiscard,
aff063e2 84 Opt_noheap,
4058c511 85 Opt_user_xattr,
aff063e2 86 Opt_nouser_xattr,
4058c511 87 Opt_acl,
aff063e2
JK		 88 Opt_noacl,
89 Opt_active_logs,
90 Opt_disable_ext_identify,
444c580f 91 Opt_inline_xattr,
8274de77 92 Opt_inline_data,
5efd3c6f 93 Opt_inline_dentry,
97c1794a 94 Opt_noinline_dentry,
6b4afdd7 95 Opt_flush_merge,
69e9e427 96 Opt_noflush_merge,
0f7b2abd 97 Opt_nobarrier,
d5053a34 98 Opt_fastboot,
89672159 99 Opt_extent_cache,
7daaea25 100 Opt_noextent_cache,
75342797 101 Opt_noinline_data,
343f40f0 102 Opt_data_flush,
36abef4e 103 Opt_mode,
73faec4d 104 Opt_fault_injection,
6d94c74a
JK		 105 Opt_lazytime,
106 Opt_nolazytime,
aff063e2
JK		 107 Opt_err,
108};
109
110static match_table_t f2fs_tokens = {
696c018c 111 {Opt_gc_background, "background_gc=%s"},
aff063e2 112 {Opt_disable_roll_forward, "disable_roll_forward"},
2d834bf9 113 {Opt_norecovery, "norecovery"},
aff063e2 114 {Opt_discard, "discard"},
64058be9 115 {Opt_nodiscard, "nodiscard"},
aff063e2 116 {Opt_noheap, "no_heap"},
4058c511 117 {Opt_user_xattr, "user_xattr"},
aff063e2 118 {Opt_nouser_xattr, "nouser_xattr"},
4058c511 119 {Opt_acl, "acl"},
aff063e2
JK		 120 {Opt_noacl, "noacl"},
121 {Opt_active_logs, "active_logs=%u"},
122 {Opt_disable_ext_identify, "disable_ext_identify"},
444c580f 123 {Opt_inline_xattr, "inline_xattr"},
8274de77 124 {Opt_inline_data, "inline_data"},
5efd3c6f 125 {Opt_inline_dentry, "inline_dentry"},
97c1794a 126 {Opt_noinline_dentry, "noinline_dentry"},
6b4afdd7 127 {Opt_flush_merge, "flush_merge"},
69e9e427 128 {Opt_noflush_merge, "noflush_merge"},
0f7b2abd 129 {Opt_nobarrier, "nobarrier"},
d5053a34 130 {Opt_fastboot, "fastboot"},
89672159 131 {Opt_extent_cache, "extent_cache"},
7daaea25 132 {Opt_noextent_cache, "noextent_cache"},
75342797 133 {Opt_noinline_data, "noinline_data"},
343f40f0 134 {Opt_data_flush, "data_flush"},
36abef4e 135 {Opt_mode, "mode=%s"},
73faec4d 136 {Opt_fault_injection, "fault_injection=%u"},
6d94c74a
JK		 137 {Opt_lazytime, "lazytime"},
138 {Opt_nolazytime, "nolazytime"},
aff063e2
JK		 139 {Opt_err, NULL},
140};
141
b59d0bae 142/* Sysfs support for f2fs */
ea91e9b0
JK		 143enum {
144 GC_THREAD, /* struct f2fs_gc_thread */
145 SM_INFO, /* struct f2fs_sm_info */
cdfc41c1 146 NM_INFO, /* struct f2fs_nm_info */
b1c57c1c 147 F2FS_SBI, /* struct f2fs_sb_info */
08796897
SY		 148#ifdef CONFIG_F2FS_FAULT_INJECTION
149 FAULT_INFO_RATE, /* struct f2fs_fault_info */
150 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
151#endif
ea91e9b0
JK		 152};
153
b59d0bae
NJ		 154struct f2fs_attr {
155 struct attribute attr;
156 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
157 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
158 const char *, size_t);
ea91e9b0 159 int struct_type;
b59d0bae
NJ		 160 int offset;
161};
162
ea91e9b0
JK		 163static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
164{
165 if (struct_type == GC_THREAD)
166 return (unsigned char *)sbi->gc_thread;
167 else if (struct_type == SM_INFO)
168 return (unsigned char *)SM_I(sbi);
cdfc41c1
JK		 169 else if (struct_type == NM_INFO)
170 return (unsigned char *)NM_I(sbi);
b1c57c1c
JK		 171 else if (struct_type == F2FS_SBI)
172 return (unsigned char *)sbi;
08796897
SY		 173#ifdef CONFIG_F2FS_FAULT_INJECTION
174 else if (struct_type == FAULT_INFO_RATE ||
175 struct_type == FAULT_INFO_TYPE)
1ecc0c5c 176 return (unsigned char *)&sbi->fault_info;
08796897 177#endif
ea91e9b0
JK		 178 return NULL;
179}
180
8f1dbbbb
SL		 181static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
182 struct f2fs_sb_info *sbi, char *buf)
183{
184 struct super_block *sb = sbi->sb;
185
186 if (!sb->s_bdev->bd_part)
187 return snprintf(buf, PAGE_SIZE, "0\n");
188
189 return snprintf(buf, PAGE_SIZE, "%llu\n",
190 (unsigned long long)(sbi->kbytes_written +
191 BD_PART_WRITTEN(sbi)));
192}
193
b59d0bae
NJ		 194static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
195 struct f2fs_sb_info *sbi, char *buf)
196{
ea91e9b0 197 unsigned char *ptr = NULL;
b59d0bae
NJ		 198 unsigned int *ui;
199
ea91e9b0
JK		 200 ptr = __struct_ptr(sbi, a->struct_type);
201 if (!ptr)
b59d0bae
NJ		 202 return -EINVAL;
203
ea91e9b0 204 ui = (unsigned int *)(ptr + a->offset);
b59d0bae
NJ		 205
206 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
207}
208
209static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
210 struct f2fs_sb_info *sbi,
211 const char *buf, size_t count)
212{
ea91e9b0 213 unsigned char *ptr;
b59d0bae
NJ		 214 unsigned long t;
215 unsigned int *ui;
216 ssize_t ret;
217
ea91e9b0
JK		 218 ptr = __struct_ptr(sbi, a->struct_type);
219 if (!ptr)
b59d0bae
NJ		 220 return -EINVAL;
221
ea91e9b0 222 ui = (unsigned int *)(ptr + a->offset);
b59d0bae
NJ		 223
224 ret = kstrtoul(skip_spaces(buf), 0, &t);
225 if (ret < 0)
226 return ret;
08796897
SY		 227#ifdef CONFIG_F2FS_FAULT_INJECTION
228 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
229 return -EINVAL;
230#endif
b59d0bae
NJ		 231 *ui = t;
232 return count;
233}
234
235static ssize_t f2fs_attr_show(struct kobject *kobj,
236 struct attribute *attr, char *buf)
237{
238 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
239 s_kobj);
240 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
241
242 return a->show ? a->show(a, sbi, buf) : 0;
243}
244
245static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
246 const char *buf, size_t len)
247{
248 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
249 s_kobj);
250 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
251
252 return a->store ? a->store(a, sbi, buf, len) : 0;
253}
254
255static void f2fs_sb_release(struct kobject *kobj)
256{
257 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
258 s_kobj);
259 complete(&sbi->s_kobj_unregister);
260}
261
ea91e9b0 262#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
b59d0bae
NJ		 263static struct f2fs_attr f2fs_attr_##_name = { \
264 .attr = {.name = __stringify(_name), .mode = _mode }, \
265 .show = _show, \
266 .store = _store, \
ea91e9b0
JK		 267 .struct_type = _struct_type, \
268 .offset = _offset \
b59d0bae
NJ		 269}
270
ea91e9b0
JK		 271#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
272 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
273 f2fs_sbi_show, f2fs_sbi_store, \
274 offsetof(struct struct_name, elname))
b59d0bae 275
8f1dbbbb
SL		 276#define F2FS_GENERAL_RO_ATTR(name) \
277static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
278
ea91e9b0
JK		 279F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
280F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
281F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
282F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
283F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
7ac8c3b0 284F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
bba681cb 285F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
216fbd64
JK		 286F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
287F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
c1ce1b02 288F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
cdfc41c1 289F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
ea1a29a0 290F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
2304cb0c 291F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
b1c57c1c 292F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
ab9fa662 293F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
6beceb54 294F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
d0239e1b 295F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
08796897
SY		 296#ifdef CONFIG_F2FS_FAULT_INJECTION
297F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
298F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
299#endif
8f1dbbbb 300F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
b59d0bae
NJ		 301
302#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
303static struct attribute *f2fs_attrs[] = {
304 ATTR_LIST(gc_min_sleep_time),
305 ATTR_LIST(gc_max_sleep_time),
306 ATTR_LIST(gc_no_gc_sleep_time),
d2dc095f 307 ATTR_LIST(gc_idle),
ea91e9b0 308 ATTR_LIST(reclaim_segments),
7ac8c3b0 309 ATTR_LIST(max_small_discards),
bba681cb 310 ATTR_LIST(batched_trim_sections),
216fbd64
JK		 311 ATTR_LIST(ipu_policy),
312 ATTR_LIST(min_ipu_util),
c1ce1b02 313 ATTR_LIST(min_fsync_blocks),
b1c57c1c 314 ATTR_LIST(max_victim_search),
ab9fa662 315 ATTR_LIST(dir_level),
cdfc41c1 316 ATTR_LIST(ram_thresh),
ea1a29a0 317 ATTR_LIST(ra_nid_pages),
2304cb0c 318 ATTR_LIST(dirty_nats_ratio),
60b99b48 319 ATTR_LIST(cp_interval),
d0239e1b 320 ATTR_LIST(idle_interval),
1ecc0c5c
CY		 321#ifdef CONFIG_F2FS_FAULT_INJECTION
322 ATTR_LIST(inject_rate),
323 ATTR_LIST(inject_type),
324#endif
8f1dbbbb 325 ATTR_LIST(lifetime_write_kbytes),
b59d0bae
NJ		 326 NULL,
327};
328
329static const struct sysfs_ops f2fs_attr_ops = {
330 .show = f2fs_attr_show,
331 .store = f2fs_attr_store,
332};
333
334static struct kobj_type f2fs_ktype = {
335 .default_attrs = f2fs_attrs,
336 .sysfs_ops = &f2fs_attr_ops,
337 .release = f2fs_sb_release,
338};
339
a07ef784
NJ		 340void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
341{
342 struct va_format vaf;
343 va_list args;
344
345 va_start(args, fmt);
346 vaf.fmt = fmt;
347 vaf.va = &args;
348 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
349 va_end(args);
350}
351
aff063e2
JK		 352static void init_once(void *foo)
353{
354 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
355
aff063e2
JK		 356 inode_init_once(&fi->vfs_inode);
357}
358
696c018c
NJ		 359static int parse_options(struct super_block *sb, char *options)
360{
361 struct f2fs_sb_info *sbi = F2FS_SB(sb);
09d54cdd 362 struct request_queue *q;
696c018c
NJ		 363 substring_t args[MAX_OPT_ARGS];
364 char *p, *name;
365 int arg = 0;
366
367 if (!options)
368 return 0;
369
370 while ((p = strsep(&options, ",")) != NULL) {
371 int token;
372 if (!*p)
373 continue;
374 /*
375 * Initialize args struct so we know whether arg was
376 * found; some options take optional arguments.
377 */
378 args[0].to = args[0].from = NULL;
379 token = match_token(p, f2fs_tokens, args);
380
381 switch (token) {
382 case Opt_gc_background:
383 name = match_strdup(&args[0]);
384
385 if (!name)
386 return -ENOMEM;
6aefd93b 387 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
696c018c 388 set_opt(sbi, BG_GC);
6aefd93b
JK		 389 clear_opt(sbi, FORCE_FG_GC);
390 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
696c018c 391 clear_opt(sbi, BG_GC);
6aefd93b
JK		 392 clear_opt(sbi, FORCE_FG_GC);
393 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
394 set_opt(sbi, BG_GC);
395 set_opt(sbi, FORCE_FG_GC);
396 } else {
696c018c
NJ		 397 kfree(name);
398 return -EINVAL;
399 }
400 kfree(name);
401 break;
402 case Opt_disable_roll_forward:
403 set_opt(sbi, DISABLE_ROLL_FORWARD);
404 break;
2d834bf9
JK		 405 case Opt_norecovery:
406 /* this option mounts f2fs with ro */
407 set_opt(sbi, DISABLE_ROLL_FORWARD);
408 if (!f2fs_readonly(sb))
409 return -EINVAL;
410 break;
696c018c 411 case Opt_discard:
09d54cdd
CY		 412 q = bdev_get_queue(sb->s_bdev);
413 if (blk_queue_discard(q)) {
414 set_opt(sbi, DISCARD);
0ab02998 415 } else if (!f2fs_sb_mounted_blkzoned(sb)) {
09d54cdd
CY		 416 f2fs_msg(sb, KERN_WARNING,
417 "mounting with \"discard\" option, but "
418 "the device does not support discard");
419 }
696c018c 420 break;
64058be9 421 case Opt_nodiscard:
96ba2dec
DLM		 422 if (f2fs_sb_mounted_blkzoned(sb)) {
423 f2fs_msg(sb, KERN_WARNING,
424 "discard is required for zoned block devices");
425 return -EINVAL;
426 }
64058be9 427 clear_opt(sbi, DISCARD);
487df616 428 break;
696c018c
NJ		 429 case Opt_noheap:
430 set_opt(sbi, NOHEAP);
431 break;
432#ifdef CONFIG_F2FS_FS_XATTR
4058c511
KA		 433 case Opt_user_xattr:
434 set_opt(sbi, XATTR_USER);
435 break;
696c018c
NJ		 436 case Opt_nouser_xattr:
437 clear_opt(sbi, XATTR_USER);
438 break;
444c580f
JK		 439 case Opt_inline_xattr:
440 set_opt(sbi, INLINE_XATTR);
441 break;
696c018c 442#else
4058c511
KA		 443 case Opt_user_xattr:
444 f2fs_msg(sb, KERN_INFO,
445 "user_xattr options not supported");
446 break;
696c018c
NJ		 447 case Opt_nouser_xattr:
448 f2fs_msg(sb, KERN_INFO,
449 "nouser_xattr options not supported");
450 break;
444c580f
JK		 451 case Opt_inline_xattr:
452 f2fs_msg(sb, KERN_INFO,
453 "inline_xattr options not supported");
454 break;
696c018c
NJ		 455#endif
456#ifdef CONFIG_F2FS_FS_POSIX_ACL
4058c511
KA		 457 case Opt_acl:
458 set_opt(sbi, POSIX_ACL);
459 break;
696c018c
NJ		 460 case Opt_noacl:
461 clear_opt(sbi, POSIX_ACL);
462 break;
463#else
4058c511
KA		 464 case Opt_acl:
465 f2fs_msg(sb, KERN_INFO, "acl options not supported");
466 break;
696c018c
NJ		 467 case Opt_noacl:
468 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
469 break;
470#endif
471 case Opt_active_logs:
472 if (args->from && match_int(args, &arg))
473 return -EINVAL;
474 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
475 return -EINVAL;
476 sbi->active_logs = arg;
477 break;
478 case Opt_disable_ext_identify:
479 set_opt(sbi, DISABLE_EXT_IDENTIFY);
480 break;
8274de77
HL		 481 case Opt_inline_data:
482 set_opt(sbi, INLINE_DATA);
483 break;
5efd3c6f
CY		 484 case Opt_inline_dentry:
485 set_opt(sbi, INLINE_DENTRY);
486 break;
97c1794a
CY		 487 case Opt_noinline_dentry:
488 clear_opt(sbi, INLINE_DENTRY);
489 break;
6b4afdd7
JK		 490 case Opt_flush_merge:
491 set_opt(sbi, FLUSH_MERGE);
492 break;
69e9e427
JK		 493 case Opt_noflush_merge:
494 clear_opt(sbi, FLUSH_MERGE);
495 break;
0f7b2abd
JK		 496 case Opt_nobarrier:
497 set_opt(sbi, NOBARRIER);
498 break;
d5053a34
JK		 499 case Opt_fastboot:
500 set_opt(sbi, FASTBOOT);
501 break;
89672159
CY		 502 case Opt_extent_cache:
503 set_opt(sbi, EXTENT_CACHE);
504 break;
7daaea25
JK		 505 case Opt_noextent_cache:
506 clear_opt(sbi, EXTENT_CACHE);
507 break;
75342797
WL		 508 case Opt_noinline_data:
509 clear_opt(sbi, INLINE_DATA);
510 break;
343f40f0
CY		 511 case Opt_data_flush:
512 set_opt(sbi, DATA_FLUSH);
513 break;
36abef4e
JK		 514 case Opt_mode:
515 name = match_strdup(&args[0]);
516
517 if (!name)
518 return -ENOMEM;
519 if (strlen(name) == 8 &&
520 !strncmp(name, "adaptive", 8)) {
3adc57e9
DLM		 521 if (f2fs_sb_mounted_blkzoned(sb)) {
522 f2fs_msg(sb, KERN_WARNING,
523 "adaptive mode is not allowed with "
524 "zoned block device feature");
525 kfree(name);
526 return -EINVAL;
527 }
52763a4b 528 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
36abef4e
JK		 529 } else if (strlen(name) == 3 &&
530 !strncmp(name, "lfs", 3)) {
52763a4b 531 set_opt_mode(sbi, F2FS_MOUNT_LFS);
36abef4e
JK		 532 } else {
533 kfree(name);
534 return -EINVAL;
535 }
536 kfree(name);
537 break;
73faec4d
JK		 538 case Opt_fault_injection:
539 if (args->from && match_int(args, &arg))
540 return -EINVAL;
541#ifdef CONFIG_F2FS_FAULT_INJECTION
1ecc0c5c 542 f2fs_build_fault_attr(sbi, arg);
73faec4d
JK		 543#else
544 f2fs_msg(sb, KERN_INFO,
545 "FAULT_INJECTION was not selected");
546#endif
547 break;
6d94c74a
JK		 548 case Opt_lazytime:
549 sb->s_flags |= MS_LAZYTIME;
550 break;
551 case Opt_nolazytime:
552 sb->s_flags &= ~MS_LAZYTIME;
553 break;
696c018c
NJ		 554 default:
555 f2fs_msg(sb, KERN_ERR,
556 "Unrecognized mount option \"%s\" or missing value",
557 p);
558 return -EINVAL;
559 }
560 }
561 return 0;
562}
563
aff063e2
JK		 564static struct inode *f2fs_alloc_inode(struct super_block *sb)
565{
566 struct f2fs_inode_info *fi;
567
a0acdfe0 568 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
aff063e2
JK		 569 if (!fi)
570 return NULL;
571
572 init_once((void *) fi);
573
1beba1b3
JK		 574 if (percpu_counter_init(&fi->dirty_pages, 0, GFP_NOFS)) {
575 kmem_cache_free(f2fs_inode_cachep, fi);
576 return NULL;
577 }
578
434720fa 579 /* Initialize f2fs-specific inode info */
aff063e2 580 fi->vfs_inode.i_version = 1;
aff063e2
JK		 581 fi->i_current_depth = 1;
582 fi->i_advise = 0;
d928bfbf 583 init_rwsem(&fi->i_sem);
2710fd7e 584 INIT_LIST_HEAD(&fi->dirty_list);
0f18b462 585 INIT_LIST_HEAD(&fi->gdirty_list);
88b88a66
JK		 586 INIT_LIST_HEAD(&fi->inmem_pages);
587 mutex_init(&fi->inmem_lock);
82e0a5aa
CY		 588 init_rwsem(&fi->dio_rwsem[READ]);
589 init_rwsem(&fi->dio_rwsem[WRITE]);
aff063e2 590
ab9fa662
JK		 591 /* Will be used by directory only */
592 fi->i_dir_level = F2FS_SB(sb)->dir_level;
aff063e2
JK		 593 return &fi->vfs_inode;
594}
595
531ad7d5
JK		 596static int f2fs_drop_inode(struct inode *inode)
597{
598 /*
599 * This is to avoid a deadlock condition like below.
600 * writeback_single_inode(inode)
601 * - f2fs_write_data_page
602 * - f2fs_gc -> iput -> evict
603 * - inode_wait_for_writeback(inode)
604 */
0f18b462 605 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
06e1bc05 606 if (!inode->i_nlink && !is_bad_inode(inode)) {
3e72f721
JK		 607 /* to avoid evict_inode call simultaneously */
608 atomic_inc(&inode->i_count);
06e1bc05
JK		 609 spin_unlock(&inode->i_lock);
610
611 /* some remained atomic pages should discarded */
612 if (f2fs_is_atomic_file(inode))
29b96b54 613 drop_inmem_pages(inode);
06e1bc05 614
3e72f721
JK		 615 /* should remain fi->extent_tree for writepage */
616 f2fs_destroy_extent_node(inode);
617
06e1bc05 618 sb_start_intwrite(inode->i_sb);
fc9581c8 619 f2fs_i_size_write(inode, 0);
06e1bc05
JK		 620
621 if (F2FS_HAS_BLOCKS(inode))
9a449e9c 622 f2fs_truncate(inode);
06e1bc05
JK		 623
624 sb_end_intwrite(inode->i_sb);
625
0b81d077 626 fscrypt_put_encryption_info(inode, NULL);
06e1bc05 627 spin_lock(&inode->i_lock);
3e72f721 628 atomic_dec(&inode->i_count);
06e1bc05 629 }
531ad7d5 630 return 0;
06e1bc05 631 }
0f18b462 632
67c3758d 633 return generic_drop_inode(inode);
531ad7d5
JK		 634}
635
7c45729a 636int f2fs_inode_dirtied(struct inode *inode, bool sync)
b3783873 637{
0f18b462 638 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
7c45729a 639 int ret = 0;
0f18b462 640
0f18b462
JK		 641 spin_lock(&sbi->inode_lock[DIRTY_META]);
642 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
7c45729a
JK		 643 ret = 1;
644 } else {
645 set_inode_flag(inode, FI_DIRTY_INODE);
646 stat_inc_dirty_inode(sbi, DIRTY_META);
0f18b462 647 }
7c45729a
JK		 648 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
649 list_add_tail(&F2FS_I(inode)->gdirty_list,
0f18b462 650 &sbi->inode_list[DIRTY_META]);
7c45729a
JK		 651 inc_page_count(sbi, F2FS_DIRTY_IMETA);
652 }
338bbfa0 653 spin_unlock(&sbi->inode_lock[DIRTY_META]);
7c45729a 654 return ret;
0f18b462
JK		 655}
656
657void f2fs_inode_synced(struct inode *inode)
658{
659 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
660
661 spin_lock(&sbi->inode_lock[DIRTY_META]);
662 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
663 spin_unlock(&sbi->inode_lock[DIRTY_META]);
664 return;
665 }
7c45729a
JK		 666 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
667 list_del_init(&F2FS_I(inode)->gdirty_list);
668 dec_page_count(sbi, F2FS_DIRTY_IMETA);
669 }
0f18b462 670 clear_inode_flag(inode, FI_DIRTY_INODE);
26de9b11 671 clear_inode_flag(inode, FI_AUTO_RECOVER);
0f18b462 672 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
338bbfa0 673 spin_unlock(&sbi->inode_lock[DIRTY_META]);
b3783873
JK		 674}
675
b56ab837
JK		 676/*
677 * f2fs_dirty_inode() is called from __mark_inode_dirty()
678 *
679 * We should call set_dirty_inode to write the dirty inode through write_inode.
680 */
681static void f2fs_dirty_inode(struct inode *inode, int flags)
682{
683 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
684
685 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
686 inode->i_ino == F2FS_META_INO(sbi))
687 return;
688
689 if (flags == I_DIRTY_TIME)
690 return;
691
692 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
693 clear_inode_flag(inode, FI_AUTO_RECOVER);
694
7c45729a 695 f2fs_inode_dirtied(inode, false);
b56ab837
JK		 696}
697
aff063e2
JK		 698static void f2fs_i_callback(struct rcu_head *head)
699{
700 struct inode *inode = container_of(head, struct inode, i_rcu);
701 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
702}
703
25ca923b 704static void f2fs_destroy_inode(struct inode *inode)
aff063e2 705{
1beba1b3 706 percpu_counter_destroy(&F2FS_I(inode)->dirty_pages);
aff063e2
JK		 707 call_rcu(&inode->i_rcu, f2fs_i_callback);
708}
709
523be8a6
JK		 710static void destroy_percpu_info(struct f2fs_sb_info *sbi)
711{
41382ec4 712 percpu_counter_destroy(&sbi->alloc_valid_block_count);
513c5f37 713 percpu_counter_destroy(&sbi->total_valid_inode_count);
523be8a6
JK		 714}
715
3c62be17
JK		 716static void destroy_device_list(struct f2fs_sb_info *sbi)
717{
718 int i;
719
720 for (i = 0; i < sbi->s_ndevs; i++) {
721 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
722#ifdef CONFIG_BLK_DEV_ZONED
723 kfree(FDEV(i).blkz_type);
724#endif
725 }
726 kfree(sbi->devs);
727}
728
aff063e2
JK		 729static void f2fs_put_super(struct super_block *sb)
730{
731 struct f2fs_sb_info *sbi = F2FS_SB(sb);
732
5e176d54
JK		 733 if (sbi->s_proc) {
734 remove_proc_entry("segment_info", sbi->s_proc);
f00d6fa7 735 remove_proc_entry("segment_bits", sbi->s_proc);
5e176d54
JK		 736 remove_proc_entry(sb->s_id, f2fs_proc_root);
737 }
b59d0bae 738 kobject_del(&sbi->s_kobj);
5e176d54 739
aff063e2
JK		 740 stop_gc_thread(sbi);
741
2658e50d
JK		 742 /* prevent remaining shrinker jobs */
743 mutex_lock(&sbi->umount_mutex);
744
85dc2f2c
JK		 745 /*
746 * We don't need to do checkpoint when superblock is clean.
747 * But, the previous checkpoint was not done by umount, it needs to do
748 * clean checkpoint again.
749 */
caf0047e 750 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
aaec2b1d 751 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
75ab4cb8
JK		 752 struct cp_control cpc = {
753 .reason = CP_UMOUNT,
754 };
755 write_checkpoint(sbi, &cpc);
756 }
aff063e2 757
eca616f8
JK		 758 /* write_checkpoint can update stat informaion */
759 f2fs_destroy_stats(sbi);
760
cf779cab
JK		 761 /*
762 * normally superblock is clean, so we need to release this.
763 * In addition, EIO will skip do checkpoint, we need this as well.
764 */
74ef9241 765 release_ino_entry(sbi, true);
6f12ac25 766
2658e50d
JK		 767 f2fs_leave_shrinker(sbi);
768 mutex_unlock(&sbi->umount_mutex);
769
17c19120 770 /* our cp_error case, we can wait for any writeback page */
f5730184 771 f2fs_flush_merged_bios(sbi);
17c19120 772
aff063e2
JK		 773 iput(sbi->node_inode);
774 iput(sbi->meta_inode);
775
776 /* destroy f2fs internal modules */
777 destroy_node_manager(sbi);
778 destroy_segment_manager(sbi);
779
780 kfree(sbi->ckpt);
b59d0bae
NJ		 781 kobject_put(&sbi->s_kobj);
782 wait_for_completion(&sbi->s_kobj_unregister);
aff063e2
JK		 783
784 sb->s_fs_info = NULL;
43b6573b
KM		 785 if (sbi->s_chksum_driver)
786 crypto_free_shash(sbi->s_chksum_driver);
b39f0de2 787 kfree(sbi->raw_super);
523be8a6 788
3c62be17
JK		 789 destroy_device_list(sbi);
790
523be8a6 791 destroy_percpu_info(sbi);
aff063e2
JK		 792 kfree(sbi);
793}
794
795int f2fs_sync_fs(struct super_block *sb, int sync)
796{
797 struct f2fs_sb_info *sbi = F2FS_SB(sb);
c34f42e2 798 int err = 0;
aff063e2 799
a2a4a7e4
NJ		 800 trace_f2fs_sync_fs(sb, sync);
801
b7473754 802 if (sync) {
d5053a34
JK		 803 struct cp_control cpc;
804
119ee914
JK		 805 cpc.reason = __get_cp_reason(sbi);
806
b7473754 807 mutex_lock(&sbi->gc_mutex);
c34f42e2 808 err = write_checkpoint(sbi, &cpc);
b7473754 809 mutex_unlock(&sbi->gc_mutex);
b7473754 810 }
05ca3632 811 f2fs_trace_ios(NULL, 1);
aff063e2 812
c34f42e2 813 return err;
aff063e2
JK		 814}
815
d6212a5f
CL		 816static int f2fs_freeze(struct super_block *sb)
817{
77888c1e 818 if (f2fs_readonly(sb))
d6212a5f
CL		 819 return 0;
820
b4b9d34c
JK		 821 /* IO error happened before */
822 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
823 return -EIO;
824
825 /* must be clean, since sync_filesystem() was already called */
826 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
827 return -EINVAL;
828 return 0;
d6212a5f
CL		 829}
830
831static int f2fs_unfreeze(struct super_block *sb)
832{
833 return 0;
834}
835
aff063e2
JK		 836static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
837{
838 struct super_block *sb = dentry->d_sb;
839 struct f2fs_sb_info *sbi = F2FS_SB(sb);
840 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
841 block_t total_count, user_block_count, start_count, ovp_count;
842
843 total_count = le64_to_cpu(sbi->raw_super->block_count);
844 user_block_count = sbi->user_block_count;
845 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
846 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
847 buf->f_type = F2FS_SUPER_MAGIC;
848 buf->f_bsize = sbi->blocksize;
849
850 buf->f_blocks = total_count - start_count;
3e6d0b4d 851 buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count;
aff063e2
JK		 852 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
853
c200b1aa
CY		 854 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
855 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
aff063e2 856
5a20d339 857 buf->f_namelen = F2FS_NAME_LEN;
aff063e2
JK		 858 buf->f_fsid.val[0] = (u32)id;
859 buf->f_fsid.val[1] = (u32)(id >> 32);
860
861 return 0;
862}
863
864static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
865{
866 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
867
6aefd93b
JK		 868 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
869 if (test_opt(sbi, FORCE_FG_GC))
870 seq_printf(seq, ",background_gc=%s", "sync");
871 else
872 seq_printf(seq, ",background_gc=%s", "on");
873 } else {
696c018c 874 seq_printf(seq, ",background_gc=%s", "off");
6aefd93b 875 }
aff063e2
JK		 876 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
877 seq_puts(seq, ",disable_roll_forward");
878 if (test_opt(sbi, DISCARD))
879 seq_puts(seq, ",discard");
880 if (test_opt(sbi, NOHEAP))
881 seq_puts(seq, ",no_heap_alloc");
882#ifdef CONFIG_F2FS_FS_XATTR
883 if (test_opt(sbi, XATTR_USER))
884 seq_puts(seq, ",user_xattr");
885 else
886 seq_puts(seq, ",nouser_xattr");
444c580f
JK		 887 if (test_opt(sbi, INLINE_XATTR))
888 seq_puts(seq, ",inline_xattr");
aff063e2
JK		 889#endif
890#ifdef CONFIG_F2FS_FS_POSIX_ACL
891 if (test_opt(sbi, POSIX_ACL))
892 seq_puts(seq, ",acl");
893 else
894 seq_puts(seq, ",noacl");
895#endif
896 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
aa43507f 897 seq_puts(seq, ",disable_ext_identify");
8274de77
HL		 898 if (test_opt(sbi, INLINE_DATA))
899 seq_puts(seq, ",inline_data");
75342797
WL		 900 else
901 seq_puts(seq, ",noinline_data");
5efd3c6f
CY		 902 if (test_opt(sbi, INLINE_DENTRY))
903 seq_puts(seq, ",inline_dentry");
97c1794a
CY		 904 else
905 seq_puts(seq, ",noinline_dentry");
b270ad6f 906 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
6b4afdd7 907 seq_puts(seq, ",flush_merge");
0f7b2abd
JK		 908 if (test_opt(sbi, NOBARRIER))
909 seq_puts(seq, ",nobarrier");
d5053a34
JK		 910 if (test_opt(sbi, FASTBOOT))
911 seq_puts(seq, ",fastboot");
89672159
CY		 912 if (test_opt(sbi, EXTENT_CACHE))
913 seq_puts(seq, ",extent_cache");
7daaea25
JK		 914 else
915 seq_puts(seq, ",noextent_cache");
343f40f0
CY		 916 if (test_opt(sbi, DATA_FLUSH))
917 seq_puts(seq, ",data_flush");
36abef4e
JK		 918
919 seq_puts(seq, ",mode=");
920 if (test_opt(sbi, ADAPTIVE))
921 seq_puts(seq, "adaptive");
922 else if (test_opt(sbi, LFS))
923 seq_puts(seq, "lfs");
aff063e2
JK		 924 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
925
926 return 0;
927}
928
5e176d54
JK		 929static int segment_info_seq_show(struct seq_file *seq, void *offset)
930{
931 struct super_block *sb = seq->private;
932 struct f2fs_sb_info *sbi = F2FS_SB(sb);
6c311ec6
CF		 933 unsigned int total_segs =
934 le32_to_cpu(sbi->raw_super->segment_count_main);
5e176d54
JK		 935 int i;
936
90aa6dc9
CY		 937 seq_puts(seq, "format: segment_type|valid_blocks\n"
938 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
939
5e176d54 940 for (i = 0; i < total_segs; i++) {
90aa6dc9
CY		 941 struct seg_entry *se = get_seg_entry(sbi, i);
942
943 if ((i % 10) == 0)
01a5ad82 944 seq_printf(seq, "%-10d", i);
90aa6dc9
CY		 945 seq_printf(seq, "%d|%-3u", se->type,
946 get_valid_blocks(sbi, i, 1));
46c04366
GZ		 947 if ((i % 10) == 9 || i == (total_segs - 1))
948 seq_putc(seq, '\n');
5e176d54 949 else
46c04366 950 seq_putc(seq, ' ');
5e176d54 951 }
46c04366 952
5e176d54
JK		 953 return 0;
954}
955
f00d6fa7
JK		 956static int segment_bits_seq_show(struct seq_file *seq, void *offset)
957{
958 struct super_block *sb = seq->private;
959 struct f2fs_sb_info *sbi = F2FS_SB(sb);
960 unsigned int total_segs =
961 le32_to_cpu(sbi->raw_super->segment_count_main);
962 int i, j;
963
964 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
965 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
966
967 for (i = 0; i < total_segs; i++) {
968 struct seg_entry *se = get_seg_entry(sbi, i);
969
970 seq_printf(seq, "%-10d", i);
971 seq_printf(seq, "%d|%-3u|", se->type,
972 get_valid_blocks(sbi, i, 1));
973 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
d32853de 974 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
f00d6fa7
JK		 975 seq_putc(seq, '\n');
976 }
977 return 0;
978}
979
b7a15f3d
JK		 980#define F2FS_PROC_FILE_DEF(_name) \
981static int _name##_open_fs(struct inode *inode, struct file *file) \
982{ \
983 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
984} \
985 \
986static const struct file_operations f2fs_seq_##_name##_fops = { \
b7a15f3d
JK		 987 .open = _name##_open_fs, \
988 .read = seq_read, \
989 .llseek = seq_lseek, \
990 .release = single_release, \
5e176d54
JK		 991};
992
b7a15f3d 993F2FS_PROC_FILE_DEF(segment_info);
f00d6fa7 994F2FS_PROC_FILE_DEF(segment_bits);
b7a15f3d 995
498c5e9f
YH		 996static void default_options(struct f2fs_sb_info *sbi)
997{
998 /* init some FS parameters */
999 sbi->active_logs = NR_CURSEG_TYPE;
1000
1001 set_opt(sbi, BG_GC);
1002 set_opt(sbi, INLINE_DATA);
97c1794a 1003 set_opt(sbi, INLINE_DENTRY);
3e72f721 1004 set_opt(sbi, EXTENT_CACHE);
6d94c74a 1005 sbi->sb->s_flags |= MS_LAZYTIME;
69e9e427 1006 set_opt(sbi, FLUSH_MERGE);
0bfd7a09 1007 if (f2fs_sb_mounted_blkzoned(sbi->sb)) {
52763a4b
JK		 1008 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1009 set_opt(sbi, DISCARD);
1010 } else {
1011 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
1012 }
498c5e9f
YH		 1013
1014#ifdef CONFIG_F2FS_FS_XATTR
1015 set_opt(sbi, XATTR_USER);
1016#endif
1017#ifdef CONFIG_F2FS_FS_POSIX_ACL
1018 set_opt(sbi, POSIX_ACL);
1019#endif
36dbd328
CY		 1020
1021#ifdef CONFIG_F2FS_FAULT_INJECTION
1022 f2fs_build_fault_attr(sbi, 0);
1023#endif
498c5e9f
YH		 1024}
1025
696c018c
NJ		 1026static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1027{
1028 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1029 struct f2fs_mount_info org_mount_opt;
1030 int err, active_logs;
876dc59e
GZ		 1031 bool need_restart_gc = false;
1032 bool need_stop_gc = false;
9cd81ce3 1033 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2443b8b3
CY		 1034#ifdef CONFIG_F2FS_FAULT_INJECTION
1035 struct f2fs_fault_info ffi = sbi->fault_info;
1036#endif
696c018c
NJ		 1037
1038 /*
1039 * Save the old mount options in case we
1040 * need to restore them.
1041 */
1042 org_mount_opt = sbi->mount_opt;
1043 active_logs = sbi->active_logs;
1044
df728b0f
JK		 1045 /* recover superblocks we couldn't write due to previous RO mount */
1046 if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1047 err = f2fs_commit_super(sbi, false);
1048 f2fs_msg(sb, KERN_INFO,
1049 "Try to recover all the superblocks, ret: %d", err);
1050 if (!err)
1051 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1052 }
1053
26666c8a 1054 sbi->mount_opt.opt = 0;
498c5e9f 1055 default_options(sbi);
26666c8a 1056
696c018c
NJ		 1057 /* parse mount options */
1058 err = parse_options(sb, data);
1059 if (err)
1060 goto restore_opts;
1061
1062 /*
1063 * Previous and new state of filesystem is RO,
876dc59e 1064 * so skip checking GC and FLUSH_MERGE conditions.
696c018c 1065 */
6b2920a5 1066 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
696c018c
NJ		 1067 goto skip;
1068
9cd81ce3
CY		 1069 /* disallow enable/disable extent_cache dynamically */
1070 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1071 err = -EINVAL;
1072 f2fs_msg(sbi->sb, KERN_WARNING,
1073 "switch extent_cache option is not allowed");
1074 goto restore_opts;
1075 }
1076
696c018c
NJ		 1077 /*
1078 * We stop the GC thread if FS is mounted as RO
1079 * or if background_gc = off is passed in mount
1080 * option. Also sync the filesystem.
1081 */
1082 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
1083 if (sbi->gc_thread) {
1084 stop_gc_thread(sbi);
876dc59e 1085 need_restart_gc = true;
696c018c 1086 }
aba291b3 1087 } else if (!sbi->gc_thread) {
696c018c
NJ		 1088 err = start_gc_thread(sbi);
1089 if (err)
1090 goto restore_opts;
876dc59e
GZ		 1091 need_stop_gc = true;
1092 }
1093
faa0e55b
JK		 1094 if (*flags & MS_RDONLY) {
1095 writeback_inodes_sb(sb, WB_REASON_SYNC);
1096 sync_inodes_sb(sb);
1097
1098 set_sbi_flag(sbi, SBI_IS_DIRTY);
1099 set_sbi_flag(sbi, SBI_IS_CLOSE);
1100 f2fs_sync_fs(sb, 1);
1101 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1102 }
1103
876dc59e
GZ		 1104 /*
1105 * We stop issue flush thread if FS is mounted as RO
1106 * or if flush_merge is not passed in mount option.
1107 */
1108 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
2163d198 1109 destroy_flush_cmd_control(sbi);
aba291b3 1110 } else if (!SM_I(sbi)->cmd_control_info) {
2163d198
GZ		 1111 err = create_flush_cmd_control(sbi);
1112 if (err)
a688b9d9 1113 goto restore_gc;
696c018c
NJ		 1114 }
1115skip:
1116 /* Update the POSIXACL Flag */
df728b0f 1117 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
696c018c 1118 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
df728b0f 1119
696c018c 1120 return 0;
876dc59e
GZ		 1121restore_gc:
1122 if (need_restart_gc) {
1123 if (start_gc_thread(sbi))
1124 f2fs_msg(sbi->sb, KERN_WARNING,
e1c42045 1125 "background gc thread has stopped");
876dc59e
GZ		 1126 } else if (need_stop_gc) {
1127 stop_gc_thread(sbi);
1128 }
696c018c
NJ		 1129restore_opts:
1130 sbi->mount_opt = org_mount_opt;
1131 sbi->active_logs = active_logs;
2443b8b3
CY		 1132#ifdef CONFIG_F2FS_FAULT_INJECTION
1133 sbi->fault_info = ffi;
1134#endif
696c018c
NJ		 1135 return err;
1136}
1137
aff063e2
JK		 1138static struct super_operations f2fs_sops = {
1139 .alloc_inode = f2fs_alloc_inode,
531ad7d5 1140 .drop_inode = f2fs_drop_inode,
aff063e2
JK		 1141 .destroy_inode = f2fs_destroy_inode,
1142 .write_inode = f2fs_write_inode,
b3783873 1143 .dirty_inode = f2fs_dirty_inode,
aff063e2
JK		 1144 .show_options = f2fs_show_options,
1145 .evict_inode = f2fs_evict_inode,
1146 .put_super = f2fs_put_super,
1147 .sync_fs = f2fs_sync_fs,
d6212a5f
CL		 1148 .freeze_fs = f2fs_freeze,
1149 .unfreeze_fs = f2fs_unfreeze,
aff063e2 1150 .statfs = f2fs_statfs,
696c018c 1151 .remount_fs = f2fs_remount,
aff063e2
JK		 1152};
1153
0b81d077
JK		 1154#ifdef CONFIG_F2FS_FS_ENCRYPTION
1155static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
1156{
1157 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1158 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1159 ctx, len, NULL);
1160}
1161
b5a7aef1
JK		 1162static int f2fs_key_prefix(struct inode *inode, u8 **key)
1163{
1164 *key = F2FS_I_SB(inode)->key_prefix;
1165 return F2FS_I_SB(inode)->key_prefix_size;
1166}
1167
0b81d077
JK		 1168static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
1169 void *fs_data)
1170{
1171 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1172 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1173 ctx, len, fs_data, XATTR_CREATE);
1174}
1175
1176static unsigned f2fs_max_namelen(struct inode *inode)
1177{
1178 return S_ISLNK(inode->i_mode) ?
1179 inode->i_sb->s_blocksize : F2FS_NAME_LEN;
1180}
1181
1182static struct fscrypt_operations f2fs_cryptops = {
1183 .get_context = f2fs_get_context,
b5a7aef1 1184 .key_prefix = f2fs_key_prefix,
0b81d077
JK		 1185 .set_context = f2fs_set_context,
1186 .is_encrypted = f2fs_encrypted_inode,
1187 .empty_dir = f2fs_empty_dir,
1188 .max_namelen = f2fs_max_namelen,
1189};
1190#else
1191static struct fscrypt_operations f2fs_cryptops = {
1192 .is_encrypted = f2fs_encrypted_inode,
1193};
1194#endif
1195
aff063e2
JK		 1196static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
1197 u64 ino, u32 generation)
1198{
1199 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1200 struct inode *inode;
1201
d6b7d4b3 1202 if (check_nid_range(sbi, ino))
910bb12d 1203 return ERR_PTR(-ESTALE);
aff063e2
JK		 1204
1205 /*
1206 * f2fs_iget isn't quite right if the inode is currently unallocated!
1207 * However f2fs_iget currently does appropriate checks to handle stale
1208 * inodes so everything is OK.
1209 */
1210 inode = f2fs_iget(sb, ino);
1211 if (IS_ERR(inode))
1212 return ERR_CAST(inode);
6bacf52f 1213 if (unlikely(generation && inode->i_generation != generation)) {
aff063e2
JK		 1214 /* we didn't find the right inode.. */
1215 iput(inode);
1216 return ERR_PTR(-ESTALE);
1217 }
1218 return inode;
1219}
1220
1221static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1222 int fh_len, int fh_type)
1223{
1224 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
1225 f2fs_nfs_get_inode);
1226}
1227
1228static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
1229 int fh_len, int fh_type)
1230{
1231 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
1232 f2fs_nfs_get_inode);
1233}
1234
1235static const struct export_operations f2fs_export_ops = {
1236 .fh_to_dentry = f2fs_fh_to_dentry,
1237 .fh_to_parent = f2fs_fh_to_parent,
1238 .get_parent = f2fs_get_parent,
1239};
1240
e0afc4d6 1241static loff_t max_file_blocks(void)
aff063e2 1242{
de93653f 1243 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
aff063e2
JK		 1244 loff_t leaf_count = ADDRS_PER_BLOCK;
1245
1246 /* two direct node blocks */
1247 result += (leaf_count * 2);
1248
1249 /* two indirect node blocks */
1250 leaf_count *= NIDS_PER_BLOCK;
1251 result += (leaf_count * 2);
1252
1253 /* one double indirect node block */
1254 leaf_count *= NIDS_PER_BLOCK;
1255 result += leaf_count;
1256
aff063e2
JK		 1257 return result;
1258}
1259
fd694733
JK		 1260static int __f2fs_commit_super(struct buffer_head *bh,
1261 struct f2fs_super_block *super)
1262{
1263 lock_buffer(bh);
1264 if (super)
1265 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
1266 set_buffer_uptodate(bh);
1267 set_buffer_dirty(bh);
1268 unlock_buffer(bh);
1269
1270 /* it's rare case, we can do fua all the time */
1271 return __sync_dirty_buffer(bh, WRITE_FLUSH_FUA);
1272}
1273
df728b0f 1274static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
fd694733 1275 struct buffer_head *bh)
9a59b62f 1276{
fd694733
JK		 1277 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1278 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 1279 struct super_block *sb = sbi->sb;
9a59b62f
CY		 1280 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1281 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
1282 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
1283 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
1284 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1285 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1286 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
1287 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
1288 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
1289 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
1290 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
1291 u32 segment_count = le32_to_cpu(raw_super->segment_count);
1292 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
fd694733
JK		 1293 u64 main_end_blkaddr = main_blkaddr +
1294 (segment_count_main << log_blocks_per_seg);
1295 u64 seg_end_blkaddr = segment0_blkaddr +
1296 (segment_count << log_blocks_per_seg);
9a59b62f
CY		 1297
1298 if (segment0_blkaddr != cp_blkaddr) {
1299 f2fs_msg(sb, KERN_INFO,
1300 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
1301 segment0_blkaddr, cp_blkaddr);
1302 return true;
1303 }
1304
1305 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
1306 sit_blkaddr) {
1307 f2fs_msg(sb, KERN_INFO,
1308 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
1309 cp_blkaddr, sit_blkaddr,
1310 segment_count_ckpt << log_blocks_per_seg);
1311 return true;
1312 }
1313
1314 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
1315 nat_blkaddr) {
1316 f2fs_msg(sb, KERN_INFO,
1317 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
1318 sit_blkaddr, nat_blkaddr,
1319 segment_count_sit << log_blocks_per_seg);
1320 return true;
1321 }
1322
1323 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
1324 ssa_blkaddr) {
1325 f2fs_msg(sb, KERN_INFO,
1326 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
1327 nat_blkaddr, ssa_blkaddr,
1328 segment_count_nat << log_blocks_per_seg);
1329 return true;
1330 }
1331
1332 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
1333 main_blkaddr) {
1334 f2fs_msg(sb, KERN_INFO,
1335 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
1336 ssa_blkaddr, main_blkaddr,
1337 segment_count_ssa << log_blocks_per_seg);
1338 return true;
1339 }
1340
fd694733 1341 if (main_end_blkaddr > seg_end_blkaddr) {
9a59b62f 1342 f2fs_msg(sb, KERN_INFO,
fd694733 1343 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
9a59b62f 1344 main_blkaddr,
fd694733
JK		 1345 segment0_blkaddr +
1346 (segment_count << log_blocks_per_seg),
9a59b62f
CY		 1347 segment_count_main << log_blocks_per_seg);
1348 return true;
fd694733
JK		 1349 } else if (main_end_blkaddr < seg_end_blkaddr) {
1350 int err = 0;
1351 char *res;
1352
1353 /* fix in-memory information all the time */
1354 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
1355 segment0_blkaddr) >> log_blocks_per_seg);
1356
1357 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
df728b0f 1358 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
fd694733
JK		 1359 res = "internally";
1360 } else {
1361 err = __f2fs_commit_super(bh, NULL);
1362 res = err ? "failed" : "done";
1363 }
1364 f2fs_msg(sb, KERN_INFO,
1365 "Fix alignment : %s, start(%u) end(%u) block(%u)",
1366 res, main_blkaddr,
1367 segment0_blkaddr +
1368 (segment_count << log_blocks_per_seg),
1369 segment_count_main << log_blocks_per_seg);
1370 if (err)
1371 return true;
9a59b62f 1372 }
9a59b62f
CY		 1373 return false;
1374}
1375
df728b0f 1376static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
fd694733 1377 struct buffer_head *bh)
aff063e2 1378{
fd694733
JK		 1379 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1380 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 1381 struct super_block *sb = sbi->sb;
aff063e2
JK		 1382 unsigned int blocksize;
1383
a07ef784
NJ		 1384 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
1385 f2fs_msg(sb, KERN_INFO,
1386 "Magic Mismatch, valid(0x%x) - read(0x%x)",
1387 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
aff063e2 1388 return 1;
a07ef784 1389 }
aff063e2 1390
5c9b4692 1391 /* Currently, support only 4KB page cache size */
09cbfeaf 1392 if (F2FS_BLKSIZE != PAGE_SIZE) {
5c9b4692 1393 f2fs_msg(sb, KERN_INFO,
14d7e9de 1394 "Invalid page_cache_size (%lu), supports only 4KB\n",
09cbfeaf 1395 PAGE_SIZE);
5c9b4692 1396 return 1;
1397 }
1398
aff063e2
JK		 1399 /* Currently, support only 4KB block size */
1400 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
5c9b4692 1401 if (blocksize != F2FS_BLKSIZE) {
a07ef784
NJ		 1402 f2fs_msg(sb, KERN_INFO,
1403 "Invalid blocksize (%u), supports only 4KB\n",
1404 blocksize);
aff063e2 1405 return 1;
a07ef784 1406 }
5c9b4692 1407
9a59b62f
CY		 1408 /* check log blocks per segment */
1409 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
1410 f2fs_msg(sb, KERN_INFO,
1411 "Invalid log blocks per segment (%u)\n",
1412 le32_to_cpu(raw_super->log_blocks_per_seg));
1413 return 1;
1414 }
1415
55cf9cb6
CY		 1416 /* Currently, support 512/1024/2048/4096 bytes sector size */
1417 if (le32_to_cpu(raw_super->log_sectorsize) >
1418 F2FS_MAX_LOG_SECTOR_SIZE ||
1419 le32_to_cpu(raw_super->log_sectorsize) <
1420 F2FS_MIN_LOG_SECTOR_SIZE) {
1421 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
1422 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 1423 return 1;
a07ef784 1424 }
55cf9cb6
CY		 1425 if (le32_to_cpu(raw_super->log_sectors_per_block) +
1426 le32_to_cpu(raw_super->log_sectorsize) !=
1427 F2FS_MAX_LOG_SECTOR_SIZE) {
1428 f2fs_msg(sb, KERN_INFO,
1429 "Invalid log sectors per block(%u) log sectorsize(%u)",
1430 le32_to_cpu(raw_super->log_sectors_per_block),
1431 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 1432 return 1;
a07ef784 1433 }
9a59b62f
CY		 1434
1435 /* check reserved ino info */
1436 if (le32_to_cpu(raw_super->node_ino) != 1 ||
1437 le32_to_cpu(raw_super->meta_ino) != 2 ||
1438 le32_to_cpu(raw_super->root_ino) != 3) {
1439 f2fs_msg(sb, KERN_INFO,
1440 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
1441 le32_to_cpu(raw_super->node_ino),
1442 le32_to_cpu(raw_super->meta_ino),
1443 le32_to_cpu(raw_super->root_ino));
1444 return 1;
1445 }
1446
1447 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
df728b0f 1448 if (sanity_check_area_boundary(sbi, bh))
9a59b62f
CY		 1449 return 1;
1450
aff063e2
JK		 1451 return 0;
1452}
1453
984ec63c 1454int sanity_check_ckpt(struct f2fs_sb_info *sbi)
aff063e2
JK		 1455{
1456 unsigned int total, fsmeta;
577e3495
JK		 1457 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1458 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
aff063e2
JK		 1459
1460 total = le32_to_cpu(raw_super->segment_count);
1461 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
1462 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
1463 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
1464 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
1465 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
1466
6bacf52f 1467 if (unlikely(fsmeta >= total))
aff063e2 1468 return 1;
577e3495 1469
1e968fdf 1470 if (unlikely(f2fs_cp_error(sbi))) {
577e3495
JK		 1471 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
1472 return 1;
1473 }
aff063e2
JK		 1474 return 0;
1475}
1476
1477static void init_sb_info(struct f2fs_sb_info *sbi)
1478{
1479 struct f2fs_super_block *raw_super = sbi->raw_super;
35782b23 1480 int i;
aff063e2
JK		 1481
1482 sbi->log_sectors_per_block =
1483 le32_to_cpu(raw_super->log_sectors_per_block);
1484 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
1485 sbi->blocksize = 1 << sbi->log_blocksize;
1486 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
1487 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
1488 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
1489 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
1490 sbi->total_sections = le32_to_cpu(raw_super->section_count);
1491 sbi->total_node_count =
1492 (le32_to_cpu(raw_super->segment_count_nat) / 2)
1493 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
1494 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
1495 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
1496 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
5ec4e49f 1497 sbi->cur_victim_sec = NULL_SECNO;
b1c57c1c 1498 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
aff063e2 1499
ab9fa662 1500 sbi->dir_level = DEF_DIR_LEVEL;
6beceb54 1501 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
d0239e1b 1502 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
caf0047e 1503 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2658e50d 1504
35782b23
JK		 1505 for (i = 0; i < NR_COUNT_TYPE; i++)
1506 atomic_set(&sbi->nr_pages[i], 0);
1507
2658e50d
JK		 1508 INIT_LIST_HEAD(&sbi->s_list);
1509 mutex_init(&sbi->umount_mutex);
7dfeaa32
JK		 1510 mutex_init(&sbi->wio_mutex[NODE]);
1511 mutex_init(&sbi->wio_mutex[DATA]);
aaec2b1d 1512 spin_lock_init(&sbi->cp_lock);
b5a7aef1
JK		 1513
1514#ifdef CONFIG_F2FS_FS_ENCRYPTION
1515 memcpy(sbi->key_prefix, F2FS_KEY_DESC_PREFIX,
1516 F2FS_KEY_DESC_PREFIX_SIZE);
1517 sbi->key_prefix_size = F2FS_KEY_DESC_PREFIX_SIZE;
1518#endif
aff063e2
JK		 1519}
1520
523be8a6
JK		 1521static int init_percpu_info(struct f2fs_sb_info *sbi)
1522{
35782b23 1523 int err;
41382ec4 1524
513c5f37
JK		 1525 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
1526 if (err)
1527 return err;
1528
1529 return percpu_counter_init(&sbi->total_valid_inode_count, 0,
41382ec4 1530 GFP_KERNEL);
523be8a6
JK		 1531}
1532
178053e2 1533#ifdef CONFIG_BLK_DEV_ZONED
3c62be17 1534static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
178053e2 1535{
3c62be17 1536 struct block_device *bdev = FDEV(devi).bdev;
178053e2
DLM		 1537 sector_t nr_sectors = bdev->bd_part->nr_sects;
1538 sector_t sector = 0;
1539 struct blk_zone *zones;
1540 unsigned int i, nr_zones;
1541 unsigned int n = 0;
1542 int err = -EIO;
1543
1544 if (!f2fs_sb_mounted_blkzoned(sbi->sb))
1545 return 0;
1546
3c62be17
JK		 1547 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
1548 SECTOR_TO_BLOCK(bdev_zone_size(bdev)))
1549 return -EINVAL;
178053e2 1550 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_size(bdev));
3c62be17
JK		 1551 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
1552 __ilog2_u32(sbi->blocks_per_blkz))
1553 return -EINVAL;
178053e2 1554 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3c62be17
JK		 1555 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
1556 sbi->log_blocks_per_blkz;
178053e2 1557 if (nr_sectors & (bdev_zone_size(bdev) - 1))
3c62be17 1558 FDEV(devi).nr_blkz++;
178053e2 1559
3c62be17
JK		 1560 FDEV(devi).blkz_type = kmalloc(FDEV(devi).nr_blkz, GFP_KERNEL);
1561 if (!FDEV(devi).blkz_type)
178053e2
DLM		 1562 return -ENOMEM;
1563
1564#define F2FS_REPORT_NR_ZONES 4096
1565
1566 zones = kcalloc(F2FS_REPORT_NR_ZONES, sizeof(struct blk_zone),
1567 GFP_KERNEL);
1568 if (!zones)
1569 return -ENOMEM;
1570
1571 /* Get block zones type */
1572 while (zones && sector < nr_sectors) {
1573
1574 nr_zones = F2FS_REPORT_NR_ZONES;
1575 err = blkdev_report_zones(bdev, sector,
1576 zones, &nr_zones,
1577 GFP_KERNEL);
1578 if (err)
1579 break;
1580 if (!nr_zones) {
1581 err = -EIO;
1582 break;
1583 }
1584
1585 for (i = 0; i < nr_zones; i++) {
3c62be17 1586 FDEV(devi).blkz_type[n] = zones[i].type;
178053e2
DLM		 1587 sector += zones[i].len;
1588 n++;
1589 }
1590 }
1591
1592 kfree(zones);
1593
1594 return err;
1595}
1596#endif
1597
9076a75f
GZ		 1598/*
1599 * Read f2fs raw super block.
2b39e907
SL		 1600 * Because we have two copies of super block, so read both of them
1601 * to get the first valid one. If any one of them is broken, we pass
1602 * them recovery flag back to the caller.
9076a75f 1603 */
df728b0f 1604static int read_raw_super_block(struct f2fs_sb_info *sbi,
9076a75f 1605 struct f2fs_super_block **raw_super,
e8240f65 1606 int *valid_super_block, int *recovery)
14d7e9de 1607{
df728b0f 1608 struct super_block *sb = sbi->sb;
2b39e907 1609 int block;
e8240f65 1610 struct buffer_head *bh;
fd694733 1611 struct f2fs_super_block *super;
da554e48 1612 int err = 0;
14d7e9de 1613
b39f0de2
YH		 1614 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
1615 if (!super)
1616 return -ENOMEM;
2b39e907
SL		 1617
1618 for (block = 0; block < 2; block++) {
1619 bh = sb_bread(sb, block);
1620 if (!bh) {
1621 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
9076a75f 1622 block + 1);
2b39e907
SL		 1623 err = -EIO;
1624 continue;
1625 }
14d7e9de 1626
2b39e907 1627 /* sanity checking of raw super */
df728b0f 1628 if (sanity_check_raw_super(sbi, bh)) {
2b39e907
SL		 1629 f2fs_msg(sb, KERN_ERR,
1630 "Can't find valid F2FS filesystem in %dth superblock",
1631 block + 1);
1632 err = -EINVAL;
1633 brelse(bh);
1634 continue;
1635 }
14d7e9de 1636
2b39e907 1637 if (!*raw_super) {
fd694733
JK		 1638 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
1639 sizeof(*super));
2b39e907
SL		 1640 *valid_super_block = block;
1641 *raw_super = super;
1642 }
1643 brelse(bh);
da554e48 1644 }
1645
2b39e907
SL		 1646 /* Fail to read any one of the superblocks*/
1647 if (err < 0)
1648 *recovery = 1;
da554e48 1649
da554e48 1650 /* No valid superblock */
2b39e907 1651 if (!*raw_super)
b39f0de2 1652 kfree(super);
2b39e907
SL		 1653 else
1654 err = 0;
da554e48 1655
2b39e907 1656 return err;
14d7e9de 1657}
1658
fd694733 1659int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
26d815ad 1660{
5d909cdb 1661 struct buffer_head *bh;
26d815ad
JK		 1662 int err;
1663
df728b0f
JK		 1664 if ((recover && f2fs_readonly(sbi->sb)) ||
1665 bdev_read_only(sbi->sb->s_bdev)) {
1666 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
f2353d7b 1667 return -EROFS;
df728b0f 1668 }
f2353d7b 1669
fd694733
JK		 1670 /* write back-up superblock first */
1671 bh = sb_getblk(sbi->sb, sbi->valid_super_block ? 0: 1);
5d909cdb
JK		 1672 if (!bh)
1673 return -EIO;
fd694733 1674 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
5d909cdb 1675 brelse(bh);
c5bda1c8
CY		 1676
1677 /* if we are in recovery path, skip writing valid superblock */
1678 if (recover || err)
5d909cdb 1679 return err;
26d815ad
JK		 1680
1681 /* write current valid superblock */
fd694733
JK		 1682 bh = sb_getblk(sbi->sb, sbi->valid_super_block);
1683 if (!bh)
1684 return -EIO;
1685 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
1686 brelse(bh);
1687 return err;
26d815ad
JK		 1688}
1689
3c62be17
JK		 1690static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
1691{
1692 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1693 int i;
1694
1695 for (i = 0; i < MAX_DEVICES; i++) {
1696 if (!RDEV(i).path[0])
1697 return 0;
1698
1699 if (i == 0) {
1700 sbi->devs = kzalloc(sizeof(struct f2fs_dev_info) *
1701 MAX_DEVICES, GFP_KERNEL);
1702 if (!sbi->devs)
1703 return -ENOMEM;
1704 }
1705
1706 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
1707 FDEV(i).total_segments = le32_to_cpu(RDEV(i).total_segments);
1708 if (i == 0) {
1709 FDEV(i).start_blk = 0;
1710 FDEV(i).end_blk = FDEV(i).start_blk +
1711 (FDEV(i).total_segments <<
1712 sbi->log_blocks_per_seg) - 1 +
1713 le32_to_cpu(raw_super->segment0_blkaddr);
1714 } else {
1715 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
1716 FDEV(i).end_blk = FDEV(i).start_blk +
1717 (FDEV(i).total_segments <<
1718 sbi->log_blocks_per_seg) - 1;
1719 }
1720
1721 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
1722 sbi->sb->s_mode, sbi->sb->s_type);
1723 if (IS_ERR(FDEV(i).bdev))
1724 return PTR_ERR(FDEV(i).bdev);
1725
1726 /* to release errored devices */
1727 sbi->s_ndevs = i + 1;
1728
1729#ifdef CONFIG_BLK_DEV_ZONED
1730 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
1731 !f2fs_sb_mounted_blkzoned(sbi->sb)) {
1732 f2fs_msg(sbi->sb, KERN_ERR,
1733 "Zoned block device feature not enabled\n");
1734 return -EINVAL;
1735 }
1736 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
1737 if (init_blkz_info(sbi, i)) {
1738 f2fs_msg(sbi->sb, KERN_ERR,
1739 "Failed to initialize F2FS blkzone information");
1740 return -EINVAL;
1741 }
1742 f2fs_msg(sbi->sb, KERN_INFO,
1743 "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
1744 i, FDEV(i).path,
1745 FDEV(i).total_segments,
1746 FDEV(i).start_blk, FDEV(i).end_blk,
1747 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
1748 "Host-aware" : "Host-managed");
1749 continue;
1750 }
1751#endif
1752 f2fs_msg(sbi->sb, KERN_INFO,
1753 "Mount Device [%2d]: %20s, %8u, %8x - %8x",
1754 i, FDEV(i).path,
1755 FDEV(i).total_segments,
1756 FDEV(i).start_blk, FDEV(i).end_blk);
1757 }
1758 return 0;
1759}
1760
aff063e2
JK		 1761static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
1762{
1763 struct f2fs_sb_info *sbi;
da554e48 1764 struct f2fs_super_block *raw_super;
aff063e2 1765 struct inode *root;
99e3e858 1766 int err;
2adc3505 1767 bool retry = true, need_fsck = false;
dabc4a5c 1768 char *options = NULL;
e8240f65 1769 int recovery, i, valid_super_block;
8f1dbbbb 1770 struct curseg_info *seg_i;
aff063e2 1771
ed2e621a 1772try_onemore:
da554e48 1773 err = -EINVAL;
1774 raw_super = NULL;
e8240f65 1775 valid_super_block = -1;
da554e48 1776 recovery = 0;
1777
aff063e2
JK		 1778 /* allocate memory for f2fs-specific super block info */
1779 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
1780 if (!sbi)
1781 return -ENOMEM;
1782
df728b0f
JK		 1783 sbi->sb = sb;
1784
43b6573b
KM		 1785 /* Load the checksum driver */
1786 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
1787 if (IS_ERR(sbi->s_chksum_driver)) {
1788 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
1789 err = PTR_ERR(sbi->s_chksum_driver);
1790 sbi->s_chksum_driver = NULL;
1791 goto free_sbi;
1792 }
1793
ff9234ad 1794 /* set a block size */
6bacf52f 1795 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
a07ef784 1796 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
aff063e2 1797 goto free_sbi;
a07ef784 1798 }
aff063e2 1799
df728b0f 1800 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
e8240f65 1801 &recovery);
9076a75f
GZ		 1802 if (err)
1803 goto free_sbi;
1804
5fb08372 1805 sb->s_fs_info = sbi;
52763a4b
JK		 1806 sbi->raw_super = raw_super;
1807
d1b959c8
DLM		 1808 /*
1809 * The BLKZONED feature indicates that the drive was formatted with
1810 * zone alignment optimization. This is optional for host-aware
1811 * devices, but mandatory for host-managed zoned block devices.
1812 */
1813#ifndef CONFIG_BLK_DEV_ZONED
1814 if (f2fs_sb_mounted_blkzoned(sb)) {
1815 f2fs_msg(sb, KERN_ERR,
1816 "Zoned block device support is not enabled\n");
1817 goto free_sb_buf;
1818 }
d1b959c8 1819#endif
498c5e9f 1820 default_options(sbi);
aff063e2 1821 /* parse mount options */
dabc4a5c
JK		 1822 options = kstrdup((const char *)data, GFP_KERNEL);
1823 if (data && !options) {
1824 err = -ENOMEM;
aff063e2 1825 goto free_sb_buf;
dabc4a5c
JK		 1826 }
1827
1828 err = parse_options(sb, options);
1829 if (err)
1830 goto free_options;
aff063e2 1831
e0afc4d6
CY		 1832 sbi->max_file_blocks = max_file_blocks();
1833 sb->s_maxbytes = sbi->max_file_blocks <<
1834 le32_to_cpu(raw_super->log_blocksize);
aff063e2
JK		 1835 sb->s_max_links = F2FS_LINK_MAX;
1836 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1837
1838 sb->s_op = &f2fs_sops;
0b81d077 1839 sb->s_cop = &f2fs_cryptops;
aff063e2
JK		 1840 sb->s_xattr = f2fs_xattr_handlers;
1841 sb->s_export_op = &f2fs_export_ops;
1842 sb->s_magic = F2FS_SUPER_MAGIC;
aff063e2
JK		 1843 sb->s_time_gran = 1;
1844 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1845 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1846 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1847
1848 /* init f2fs-specific super block info */
e8240f65 1849 sbi->valid_super_block = valid_super_block;
aff063e2 1850 mutex_init(&sbi->gc_mutex);
aff063e2 1851 mutex_init(&sbi->cp_mutex);
b3582c68 1852 init_rwsem(&sbi->node_write);
315df839
JK		 1853
1854 /* disallow all the data/node/meta page writes */
1855 set_sbi_flag(sbi, SBI_POR_DOING);
aff063e2 1856 spin_lock_init(&sbi->stat_lock);
971767ca 1857
df0f8dc0 1858 init_rwsem(&sbi->read_io.io_rwsem);
458e6197
JK		 1859 sbi->read_io.sbi = sbi;
1860 sbi->read_io.bio = NULL;
1861 for (i = 0; i < NR_PAGE_TYPE; i++) {
df0f8dc0 1862 init_rwsem(&sbi->write_io[i].io_rwsem);
458e6197
JK		 1863 sbi->write_io[i].sbi = sbi;
1864 sbi->write_io[i].bio = NULL;
1865 }
971767ca 1866
b873b798 1867 init_rwsem(&sbi->cp_rwsem);
fb51b5ef 1868 init_waitqueue_head(&sbi->cp_wait);
aff063e2
JK		 1869 init_sb_info(sbi);
1870
523be8a6
JK		 1871 err = init_percpu_info(sbi);
1872 if (err)
1873 goto free_options;
1874
aff063e2
JK		 1875 /* get an inode for meta space */
1876 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1877 if (IS_ERR(sbi->meta_inode)) {
a07ef784 1878 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
aff063e2 1879 err = PTR_ERR(sbi->meta_inode);
dabc4a5c 1880 goto free_options;
aff063e2
JK		 1881 }
1882
1883 err = get_valid_checkpoint(sbi);
a07ef784
NJ		 1884 if (err) {
1885 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
aff063e2 1886 goto free_meta_inode;
a07ef784 1887 }
aff063e2 1888
3c62be17
JK		 1889 /* Initialize device list */
1890 err = f2fs_scan_devices(sbi);
1891 if (err) {
1892 f2fs_msg(sb, KERN_ERR, "Failed to find devices");
1893 goto free_devices;
1894 }
1895
aff063e2
JK		 1896 sbi->total_valid_node_count =
1897 le32_to_cpu(sbi->ckpt->valid_node_count);
513c5f37
JK		 1898 percpu_counter_set(&sbi->total_valid_inode_count,
1899 le32_to_cpu(sbi->ckpt->valid_inode_count));
aff063e2
JK		 1900 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1901 sbi->total_valid_block_count =
1902 le64_to_cpu(sbi->ckpt->valid_block_count);
1903 sbi->last_valid_block_count = sbi->total_valid_block_count;
41382ec4 1904
c227f912
CY		 1905 for (i = 0; i < NR_INODE_TYPE; i++) {
1906 INIT_LIST_HEAD(&sbi->inode_list[i]);
1907 spin_lock_init(&sbi->inode_lock[i]);
1908 }
aff063e2 1909
1dcc336b
CY		 1910 init_extent_cache_info(sbi);
1911
6451e041 1912 init_ino_entry_info(sbi);
aff063e2
JK		 1913
1914 /* setup f2fs internal modules */
1915 err = build_segment_manager(sbi);
a07ef784
NJ		 1916 if (err) {
1917 f2fs_msg(sb, KERN_ERR,
1918 "Failed to initialize F2FS segment manager");
aff063e2 1919 goto free_sm;
a07ef784 1920 }
aff063e2 1921 err = build_node_manager(sbi);
a07ef784
NJ		 1922 if (err) {
1923 f2fs_msg(sb, KERN_ERR,
1924 "Failed to initialize F2FS node manager");
aff063e2 1925 goto free_nm;
a07ef784 1926 }
aff063e2 1927
8f1dbbbb
SL		 1928 /* For write statistics */
1929 if (sb->s_bdev->bd_part)
1930 sbi->sectors_written_start =
1931 (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]);
1932
1933 /* Read accumulated write IO statistics if exists */
1934 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1935 if (__exist_node_summaries(sbi))
1936 sbi->kbytes_written =
b2dde6fc 1937 le64_to_cpu(seg_i->journal->info.kbytes_written);
8f1dbbbb 1938
aff063e2
JK		 1939 build_gc_manager(sbi);
1940
1941 /* get an inode for node space */
1942 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1943 if (IS_ERR(sbi->node_inode)) {
a07ef784 1944 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
aff063e2
JK		 1945 err = PTR_ERR(sbi->node_inode);
1946 goto free_nm;
1947 }
1948
2658e50d
JK		 1949 f2fs_join_shrinker(sbi);
1950
aff063e2 1951 /* if there are nt orphan nodes free them */
8c14bfad
CY		 1952 err = recover_orphan_inodes(sbi);
1953 if (err)
1954 goto free_node_inode;
aff063e2
JK		 1955
1956 /* read root inode and dentry */
1957 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1958 if (IS_ERR(root)) {
a07ef784 1959 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
aff063e2
JK		 1960 err = PTR_ERR(root);
1961 goto free_node_inode;
1962 }
8f99a946 1963 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
9d847950 1964 iput(root);
8f99a946 1965 err = -EINVAL;
9d847950 1966 goto free_node_inode;
8f99a946 1967 }
aff063e2
JK		 1968
1969 sb->s_root = d_make_root(root); /* allocate root dentry */
1970 if (!sb->s_root) {
1971 err = -ENOMEM;
1972 goto free_root_inode;
1973 }
1974
aff063e2
JK		 1975 err = f2fs_build_stats(sbi);
1976 if (err)
6437d1b0 1977 goto free_root_inode;
aff063e2 1978
5e176d54
JK		 1979 if (f2fs_proc_root)
1980 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1981
f00d6fa7 1982 if (sbi->s_proc) {
5e176d54
JK		 1983 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1984 &f2fs_seq_segment_info_fops, sb);
f00d6fa7
JK		 1985 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
1986 &f2fs_seq_segment_bits_fops, sb);
1987 }
5e176d54 1988
b59d0bae
NJ		 1989 sbi->s_kobj.kset = f2fs_kset;
1990 init_completion(&sbi->s_kobj_unregister);
1991 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1992 "%s", sb->s_id);
1993 if (err)
6437d1b0 1994 goto free_proc;
b59d0bae 1995
6437d1b0
JK		 1996 /* recover fsynced data */
1997 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
081d78c2
JK		 1998 /*
1999 * mount should be failed, when device has readonly mode, and
2000 * previous checkpoint was not done by clean system shutdown.
2001 */
2002 if (bdev_read_only(sb->s_bdev) &&
aaec2b1d 2003 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
081d78c2
JK		 2004 err = -EROFS;
2005 goto free_kobj;
2006 }
2adc3505
CY		 2007
2008 if (need_fsck)
2009 set_sbi_flag(sbi, SBI_NEED_FSCK);
2010
a468f0ef
JK		 2011 if (!retry)
2012 goto skip_recovery;
2013
6781eabb
JK		 2014 err = recover_fsync_data(sbi, false);
2015 if (err < 0) {
2adc3505 2016 need_fsck = true;
6437d1b0 2017 f2fs_msg(sb, KERN_ERR,
99e3e858 2018 "Cannot recover all fsync data errno=%d", err);
ed2e621a
JK		 2019 goto free_kobj;
2020 }
6781eabb
JK		 2021 } else {
2022 err = recover_fsync_data(sbi, true);
2023
2024 if (!f2fs_readonly(sb) && err > 0) {
2025 err = -EINVAL;
2026 f2fs_msg(sb, KERN_ERR,
2027 "Need to recover fsync data");
2028 goto free_kobj;
2029 }
6437d1b0 2030 }
a468f0ef 2031skip_recovery:
315df839
JK		 2032 /* recover_fsync_data() cleared this already */
2033 clear_sbi_flag(sbi, SBI_POR_DOING);
b59d0bae 2034
6437d1b0
JK		 2035 /*
2036 * If filesystem is not mounted as read-only then
2037 * do start the gc_thread.
2038 */
6c029932 2039 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
6437d1b0
JK		 2040 /* After POR, we can run background GC thread.*/
2041 err = start_gc_thread(sbi);
2042 if (err)
2043 goto free_kobj;
2044 }
dabc4a5c 2045 kfree(options);
da554e48 2046
2047 /* recover broken superblock */
f2353d7b 2048 if (recovery) {
41214b3c
CY		 2049 err = f2fs_commit_super(sbi, true);
2050 f2fs_msg(sb, KERN_INFO,
99e3e858 2051 "Try to recover %dth superblock, ret: %d",
41214b3c 2052 sbi->valid_super_block ? 1 : 2, err);
da554e48 2053 }
2054
6beceb54 2055 f2fs_update_time(sbi, CP_TIME);
d0239e1b 2056 f2fs_update_time(sbi, REQ_TIME);
aff063e2 2057 return 0;
6437d1b0
JK		 2058
2059free_kobj:
0f18b462 2060 f2fs_sync_inode_meta(sbi);
6437d1b0 2061 kobject_del(&sbi->s_kobj);
29ba108d
CY		 2062 kobject_put(&sbi->s_kobj);
2063 wait_for_completion(&sbi->s_kobj_unregister);
6437d1b0 2064free_proc:
1d15bd20
CY		 2065 if (sbi->s_proc) {
2066 remove_proc_entry("segment_info", sbi->s_proc);
f00d6fa7 2067 remove_proc_entry("segment_bits", sbi->s_proc);
1d15bd20
CY		 2068 remove_proc_entry(sb->s_id, f2fs_proc_root);
2069 }
2070 f2fs_destroy_stats(sbi);
aff063e2
JK		 2071free_root_inode:
2072 dput(sb->s_root);
2073 sb->s_root = NULL;
2074free_node_inode:
bb5dada7 2075 truncate_inode_pages_final(NODE_MAPPING(sbi));
2658e50d 2076 mutex_lock(&sbi->umount_mutex);
d41065e2 2077 release_ino_entry(sbi, true);
2658e50d 2078 f2fs_leave_shrinker(sbi);
09922800
JK		 2079 /*
2080 * Some dirty meta pages can be produced by recover_orphan_inodes()
2081 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
2082 * followed by write_checkpoint() through f2fs_write_node_pages(), which
2083 * falls into an infinite loop in sync_meta_pages().
2084 */
2085 truncate_inode_pages_final(META_MAPPING(sbi));
aff063e2 2086 iput(sbi->node_inode);
2658e50d 2087 mutex_unlock(&sbi->umount_mutex);
aff063e2
JK		 2088free_nm:
2089 destroy_node_manager(sbi);
2090free_sm:
2091 destroy_segment_manager(sbi);
3c62be17
JK		 2092free_devices:
2093 destroy_device_list(sbi);
aff063e2
JK		 2094 kfree(sbi->ckpt);
2095free_meta_inode:
2096 make_bad_inode(sbi->meta_inode);
2097 iput(sbi->meta_inode);
dabc4a5c 2098free_options:
523be8a6 2099 destroy_percpu_info(sbi);
dabc4a5c 2100 kfree(options);
aff063e2 2101free_sb_buf:
b39f0de2 2102 kfree(raw_super);
aff063e2 2103free_sbi:
43b6573b
KM		 2104 if (sbi->s_chksum_driver)
2105 crypto_free_shash(sbi->s_chksum_driver);
aff063e2 2106 kfree(sbi);
ed2e621a
JK		 2107
2108 /* give only one another chance */
2109 if (retry) {
9df47ba7 2110 retry = false;
ed2e621a
JK		 2111 shrink_dcache_sb(sb);
2112 goto try_onemore;
2113 }
aff063e2
JK		 2114 return err;
2115}
2116
2117static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
2118 const char *dev_name, void *data)
2119{
2120 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
2121}
2122
30a5537f
JK		 2123static void kill_f2fs_super(struct super_block *sb)
2124{
2125 if (sb->s_root)
caf0047e 2126 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
30a5537f
JK		 2127 kill_block_super(sb);
2128}
2129
aff063e2
JK		 2130static struct file_system_type f2fs_fs_type = {
2131 .owner = THIS_MODULE,
2132 .name = "f2fs",
2133 .mount = f2fs_mount,
30a5537f 2134 .kill_sb = kill_f2fs_super,
aff063e2
JK		 2135 .fs_flags = FS_REQUIRES_DEV,
2136};
7f78e035 2137MODULE_ALIAS_FS("f2fs");
aff063e2 2138
6e6093a8 2139static int __init init_inodecache(void)
aff063e2 2140{
5d097056
VD		 2141 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
2142 sizeof(struct f2fs_inode_info), 0,
2143 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
6bacf52f 2144 if (!f2fs_inode_cachep)
aff063e2
JK		 2145 return -ENOMEM;
2146 return 0;
2147}
2148
2149static void destroy_inodecache(void)
2150{
2151 /*
2152 * Make sure all delayed rcu free inodes are flushed before we
2153 * destroy cache.
2154 */
2155 rcu_barrier();
2156 kmem_cache_destroy(f2fs_inode_cachep);
2157}
2158
2159static int __init init_f2fs_fs(void)
2160{
2161 int err;
2162
c0508650
JK		 2163 f2fs_build_trace_ios();
2164
aff063e2
JK		 2165 err = init_inodecache();
2166 if (err)
2167 goto fail;
2168 err = create_node_manager_caches();
2169 if (err)
9890ff3f 2170 goto free_inodecache;
7fd9e544 2171 err = create_segment_manager_caches();
aff063e2 2172 if (err)
9890ff3f 2173 goto free_node_manager_caches;
aff063e2
JK		 2174 err = create_checkpoint_caches();
2175 if (err)
06292073 2176 goto free_segment_manager_caches;
1dcc336b
CY		 2177 err = create_extent_cache();
2178 if (err)
2179 goto free_checkpoint_caches;
b59d0bae 2180 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
6e6b978c
WY		 2181 if (!f2fs_kset) {
2182 err = -ENOMEM;
1dcc336b 2183 goto free_extent_cache;
6e6b978c 2184 }
2658e50d 2185 err = register_shrinker(&f2fs_shrinker_info);
cfc4d971 2186 if (err)
0b81d077 2187 goto free_kset;
2658e50d
JK		 2188
2189 err = register_filesystem(&f2fs_fs_type);
2190 if (err)
2191 goto free_shrinker;
787c7b8c
CY		 2192 err = f2fs_create_root_stats();
2193 if (err)
2194 goto free_filesystem;
5e176d54 2195 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
9890ff3f
ZH		 2196 return 0;
2197
787c7b8c
CY		 2198free_filesystem:
2199 unregister_filesystem(&f2fs_fs_type);
2658e50d
JK		 2200free_shrinker:
2201 unregister_shrinker(&f2fs_shrinker_info);
9890ff3f
ZH		 2202free_kset:
2203 kset_unregister(f2fs_kset);
1dcc336b
CY		 2204free_extent_cache:
2205 destroy_extent_cache();
9890ff3f
ZH		 2206free_checkpoint_caches:
2207 destroy_checkpoint_caches();
7fd9e544
JK		 2208free_segment_manager_caches:
2209 destroy_segment_manager_caches();
9890ff3f
ZH		 2210free_node_manager_caches:
2211 destroy_node_manager_caches();
2212free_inodecache:
2213 destroy_inodecache();
aff063e2
JK		 2214fail:
2215 return err;
2216}
2217
2218static void __exit exit_f2fs_fs(void)
2219{
5e176d54 2220 remove_proc_entry("fs/f2fs", NULL);
4589d25d 2221 f2fs_destroy_root_stats();
aff063e2 2222 unregister_filesystem(&f2fs_fs_type);
b8bef79d 2223 unregister_shrinker(&f2fs_shrinker_info);
b8bef79d 2224 kset_unregister(f2fs_kset);
fdf6c8be 2225 destroy_extent_cache();
aff063e2 2226 destroy_checkpoint_caches();
5dcd8a71 2227 destroy_segment_manager_caches();
aff063e2
JK		 2228 destroy_node_manager_caches();
2229 destroy_inodecache();
351f4fba 2230 f2fs_destroy_trace_ios();
aff063e2
JK		 2231}
2232
2233module_init(init_f2fs_fs)
2234module_exit(exit_f2fs_fs)
2235
2236MODULE_AUTHOR("Samsung Electronics's Praesto Team");
2237MODULE_DESCRIPTION("Flash Friendly File System");
2238MODULE_LICENSE("GPL");
b4b9d34c 2239
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