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f2fs: simplify the way of calulating next nat address
[mirror_ubuntu-hirsute-kernel.git] / fs / f2fs / super.c
CommitLineData
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",
14b44d23 52 [FAULT_TRUNCATE] = "truncate fail",
8b038c70 53 [FAULT_IO] = "IO error",
0f348028 54 [FAULT_CHECKPOINT] = "checkpoint error",
2c63fead 55};
08796897 56
1ecc0c5c
CY		 57static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
58 unsigned int rate)
08796897 59{
1ecc0c5c
CY		 60 struct f2fs_fault_info *ffi = &sbi->fault_info;
61
08796897 62 if (rate) {
1ecc0c5c
CY		 63 atomic_set(&ffi->inject_ops, 0);
64 ffi->inject_rate = rate;
65 ffi->inject_type = (1 << FAULT_MAX) - 1;
08796897 66 } else {
1ecc0c5c 67 memset(ffi, 0, sizeof(struct f2fs_fault_info));
08796897
SY		 68 }
69}
73faec4d
JK		 70#endif
71
2658e50d
JK		 72/* f2fs-wide shrinker description */
73static struct shrinker f2fs_shrinker_info = {
74 .scan_objects = f2fs_shrink_scan,
75 .count_objects = f2fs_shrink_count,
76 .seeks = DEFAULT_SEEKS,
77};
78
aff063e2 79enum {
696c018c 80 Opt_gc_background,
aff063e2 81 Opt_disable_roll_forward,
2d834bf9 82 Opt_norecovery,
aff063e2 83 Opt_discard,
64058be9 84 Opt_nodiscard,
aff063e2 85 Opt_noheap,
7a20b8a6 86 Opt_heap,
4058c511 87 Opt_user_xattr,
aff063e2 88 Opt_nouser_xattr,
4058c511 89 Opt_acl,
aff063e2
JK		 90 Opt_noacl,
91 Opt_active_logs,
92 Opt_disable_ext_identify,
444c580f 93 Opt_inline_xattr,
23cf7212 94 Opt_noinline_xattr,
8274de77 95 Opt_inline_data,
5efd3c6f 96 Opt_inline_dentry,
97c1794a 97 Opt_noinline_dentry,
6b4afdd7 98 Opt_flush_merge,
69e9e427 99 Opt_noflush_merge,
0f7b2abd 100 Opt_nobarrier,
d5053a34 101 Opt_fastboot,
89672159 102 Opt_extent_cache,
7daaea25 103 Opt_noextent_cache,
75342797 104 Opt_noinline_data,
343f40f0 105 Opt_data_flush,
36abef4e 106 Opt_mode,
ec91538d 107 Opt_io_size_bits,
73faec4d 108 Opt_fault_injection,
6d94c74a
JK		 109 Opt_lazytime,
110 Opt_nolazytime,
aff063e2
JK		 111 Opt_err,
112};
113
114static match_table_t f2fs_tokens = {
696c018c 115 {Opt_gc_background, "background_gc=%s"},
aff063e2 116 {Opt_disable_roll_forward, "disable_roll_forward"},
2d834bf9 117 {Opt_norecovery, "norecovery"},
aff063e2 118 {Opt_discard, "discard"},
64058be9 119 {Opt_nodiscard, "nodiscard"},
aff063e2 120 {Opt_noheap, "no_heap"},
7a20b8a6 121 {Opt_heap, "heap"},
4058c511 122 {Opt_user_xattr, "user_xattr"},
aff063e2 123 {Opt_nouser_xattr, "nouser_xattr"},
4058c511 124 {Opt_acl, "acl"},
aff063e2
JK		 125 {Opt_noacl, "noacl"},
126 {Opt_active_logs, "active_logs=%u"},
127 {Opt_disable_ext_identify, "disable_ext_identify"},
444c580f 128 {Opt_inline_xattr, "inline_xattr"},
23cf7212 129 {Opt_noinline_xattr, "noinline_xattr"},
8274de77 130 {Opt_inline_data, "inline_data"},
5efd3c6f 131 {Opt_inline_dentry, "inline_dentry"},
97c1794a 132 {Opt_noinline_dentry, "noinline_dentry"},
6b4afdd7 133 {Opt_flush_merge, "flush_merge"},
69e9e427 134 {Opt_noflush_merge, "noflush_merge"},
0f7b2abd 135 {Opt_nobarrier, "nobarrier"},
d5053a34 136 {Opt_fastboot, "fastboot"},
89672159 137 {Opt_extent_cache, "extent_cache"},
7daaea25 138 {Opt_noextent_cache, "noextent_cache"},
75342797 139 {Opt_noinline_data, "noinline_data"},
343f40f0 140 {Opt_data_flush, "data_flush"},
36abef4e 141 {Opt_mode, "mode=%s"},
ec91538d 142 {Opt_io_size_bits, "io_bits=%u"},
73faec4d 143 {Opt_fault_injection, "fault_injection=%u"},
6d94c74a
JK		 144 {Opt_lazytime, "lazytime"},
145 {Opt_nolazytime, "nolazytime"},
aff063e2
JK		 146 {Opt_err, NULL},
147};
148
b59d0bae 149/* Sysfs support for f2fs */
ea91e9b0
JK		 150enum {
151 GC_THREAD, /* struct f2fs_gc_thread */
152 SM_INFO, /* struct f2fs_sm_info */
0b54fb84 153 DCC_INFO, /* struct discard_cmd_control */
cdfc41c1 154 NM_INFO, /* struct f2fs_nm_info */
b1c57c1c 155 F2FS_SBI, /* struct f2fs_sb_info */
08796897
SY		 156#ifdef CONFIG_F2FS_FAULT_INJECTION
157 FAULT_INFO_RATE, /* struct f2fs_fault_info */
158 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
159#endif
ea91e9b0
JK		 160};
161
b59d0bae
NJ		 162struct f2fs_attr {
163 struct attribute attr;
164 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
165 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
166 const char *, size_t);
ea91e9b0 167 int struct_type;
b59d0bae
NJ		 168 int offset;
169};
170
ea91e9b0
JK		 171static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
172{
173 if (struct_type == GC_THREAD)
174 return (unsigned char *)sbi->gc_thread;
175 else if (struct_type == SM_INFO)
176 return (unsigned char *)SM_I(sbi);
0b54fb84
JK		 177 else if (struct_type == DCC_INFO)
178 return (unsigned char *)SM_I(sbi)->dcc_info;
cdfc41c1
JK		 179 else if (struct_type == NM_INFO)
180 return (unsigned char *)NM_I(sbi);
b1c57c1c
JK		 181 else if (struct_type == F2FS_SBI)
182 return (unsigned char *)sbi;
08796897
SY		 183#ifdef CONFIG_F2FS_FAULT_INJECTION
184 else if (struct_type == FAULT_INFO_RATE ||
185 struct_type == FAULT_INFO_TYPE)
1ecc0c5c 186 return (unsigned char *)&sbi->fault_info;
08796897 187#endif
ea91e9b0
JK		 188 return NULL;
189}
190
8f1dbbbb
SL		 191static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
192 struct f2fs_sb_info *sbi, char *buf)
193{
194 struct super_block *sb = sbi->sb;
195
196 if (!sb->s_bdev->bd_part)
197 return snprintf(buf, PAGE_SIZE, "0\n");
198
199 return snprintf(buf, PAGE_SIZE, "%llu\n",
200 (unsigned long long)(sbi->kbytes_written +
201 BD_PART_WRITTEN(sbi)));
202}
203
b59d0bae
NJ		 204static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
205 struct f2fs_sb_info *sbi, char *buf)
206{
ea91e9b0 207 unsigned char *ptr = NULL;
b59d0bae
NJ		 208 unsigned int *ui;
209
ea91e9b0
JK		 210 ptr = __struct_ptr(sbi, a->struct_type);
211 if (!ptr)
b59d0bae
NJ		 212 return -EINVAL;
213
ea91e9b0 214 ui = (unsigned int *)(ptr + a->offset);
b59d0bae
NJ		 215
216 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
217}
218
219static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
220 struct f2fs_sb_info *sbi,
221 const char *buf, size_t count)
222{
ea91e9b0 223 unsigned char *ptr;
b59d0bae
NJ		 224 unsigned long t;
225 unsigned int *ui;
226 ssize_t ret;
227
ea91e9b0
JK		 228 ptr = __struct_ptr(sbi, a->struct_type);
229 if (!ptr)
b59d0bae
NJ		 230 return -EINVAL;
231
ea91e9b0 232 ui = (unsigned int *)(ptr + a->offset);
b59d0bae
NJ		 233
234 ret = kstrtoul(skip_spaces(buf), 0, &t);
235 if (ret < 0)
236 return ret;
08796897
SY		 237#ifdef CONFIG_F2FS_FAULT_INJECTION
238 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
239 return -EINVAL;
240#endif
b59d0bae
NJ		 241 *ui = t;
242 return count;
243}
244
245static ssize_t f2fs_attr_show(struct kobject *kobj,
246 struct attribute *attr, char *buf)
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->show ? a->show(a, sbi, buf) : 0;
253}
254
255static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
256 const char *buf, size_t len)
257{
258 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
259 s_kobj);
260 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
261
262 return a->store ? a->store(a, sbi, buf, len) : 0;
263}
264
265static void f2fs_sb_release(struct kobject *kobj)
266{
267 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
268 s_kobj);
269 complete(&sbi->s_kobj_unregister);
270}
271
ea91e9b0 272#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
b59d0bae
NJ		 273static struct f2fs_attr f2fs_attr_##_name = { \
274 .attr = {.name = __stringify(_name), .mode = _mode }, \
275 .show = _show, \
276 .store = _store, \
ea91e9b0
JK		 277 .struct_type = _struct_type, \
278 .offset = _offset \
b59d0bae
NJ		 279}
280
ea91e9b0
JK		 281#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
282 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
283 f2fs_sbi_show, f2fs_sbi_store, \
284 offsetof(struct struct_name, elname))
b59d0bae 285
8f1dbbbb
SL		 286#define F2FS_GENERAL_RO_ATTR(name) \
287static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
288
ea91e9b0
JK		 289F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
290F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
291F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
292F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
293F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
0b54fb84 294F2FS_RW_ATTR(DCC_INFO, discard_cmd_control, max_small_discards, max_discards);
bba681cb 295F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
216fbd64
JK		 296F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
297F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
c1ce1b02 298F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
ef095d19 299F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_hot_blocks, min_hot_blocks);
cdfc41c1 300F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
ea1a29a0 301F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
2304cb0c 302F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
b1c57c1c 303F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
ab9fa662 304F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
6beceb54 305F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
d0239e1b 306F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
08796897
SY		 307#ifdef CONFIG_F2FS_FAULT_INJECTION
308F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
309F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
310#endif
8f1dbbbb 311F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
b59d0bae
NJ		 312
313#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
314static struct attribute *f2fs_attrs[] = {
315 ATTR_LIST(gc_min_sleep_time),
316 ATTR_LIST(gc_max_sleep_time),
317 ATTR_LIST(gc_no_gc_sleep_time),
d2dc095f 318 ATTR_LIST(gc_idle),
ea91e9b0 319 ATTR_LIST(reclaim_segments),
7ac8c3b0 320 ATTR_LIST(max_small_discards),
bba681cb 321 ATTR_LIST(batched_trim_sections),
216fbd64
JK		 322 ATTR_LIST(ipu_policy),
323 ATTR_LIST(min_ipu_util),
c1ce1b02 324 ATTR_LIST(min_fsync_blocks),
ef095d19 325 ATTR_LIST(min_hot_blocks),
b1c57c1c 326 ATTR_LIST(max_victim_search),
ab9fa662 327 ATTR_LIST(dir_level),
cdfc41c1 328 ATTR_LIST(ram_thresh),
ea1a29a0 329 ATTR_LIST(ra_nid_pages),
2304cb0c 330 ATTR_LIST(dirty_nats_ratio),
60b99b48 331 ATTR_LIST(cp_interval),
d0239e1b 332 ATTR_LIST(idle_interval),
1ecc0c5c
CY		 333#ifdef CONFIG_F2FS_FAULT_INJECTION
334 ATTR_LIST(inject_rate),
335 ATTR_LIST(inject_type),
336#endif
8f1dbbbb 337 ATTR_LIST(lifetime_write_kbytes),
b59d0bae
NJ		 338 NULL,
339};
340
341static const struct sysfs_ops f2fs_attr_ops = {
342 .show = f2fs_attr_show,
343 .store = f2fs_attr_store,
344};
345
346static struct kobj_type f2fs_ktype = {
347 .default_attrs = f2fs_attrs,
348 .sysfs_ops = &f2fs_attr_ops,
349 .release = f2fs_sb_release,
350};
351
a07ef784
NJ		 352void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
353{
354 struct va_format vaf;
355 va_list args;
356
357 va_start(args, fmt);
358 vaf.fmt = fmt;
359 vaf.va = &args;
360 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
361 va_end(args);
362}
363
aff063e2
JK		 364static void init_once(void *foo)
365{
366 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
367
aff063e2
JK		 368 inode_init_once(&fi->vfs_inode);
369}
370
696c018c
NJ		 371static int parse_options(struct super_block *sb, char *options)
372{
373 struct f2fs_sb_info *sbi = F2FS_SB(sb);
09d54cdd 374 struct request_queue *q;
696c018c
NJ		 375 substring_t args[MAX_OPT_ARGS];
376 char *p, *name;
377 int arg = 0;
378
379 if (!options)
380 return 0;
381
382 while ((p = strsep(&options, ",")) != NULL) {
383 int token;
384 if (!*p)
385 continue;
386 /*
387 * Initialize args struct so we know whether arg was
388 * found; some options take optional arguments.
389 */
390 args[0].to = args[0].from = NULL;
391 token = match_token(p, f2fs_tokens, args);
392
393 switch (token) {
394 case Opt_gc_background:
395 name = match_strdup(&args[0]);
396
397 if (!name)
398 return -ENOMEM;
6aefd93b 399 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
696c018c 400 set_opt(sbi, BG_GC);
6aefd93b
JK		 401 clear_opt(sbi, FORCE_FG_GC);
402 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
696c018c 403 clear_opt(sbi, BG_GC);
6aefd93b
JK		 404 clear_opt(sbi, FORCE_FG_GC);
405 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
406 set_opt(sbi, BG_GC);
407 set_opt(sbi, FORCE_FG_GC);
408 } else {
696c018c
NJ		 409 kfree(name);
410 return -EINVAL;
411 }
412 kfree(name);
413 break;
414 case Opt_disable_roll_forward:
415 set_opt(sbi, DISABLE_ROLL_FORWARD);
416 break;
2d834bf9
JK		 417 case Opt_norecovery:
418 /* this option mounts f2fs with ro */
419 set_opt(sbi, DISABLE_ROLL_FORWARD);
420 if (!f2fs_readonly(sb))
421 return -EINVAL;
422 break;
696c018c 423 case Opt_discard:
09d54cdd
CY		 424 q = bdev_get_queue(sb->s_bdev);
425 if (blk_queue_discard(q)) {
426 set_opt(sbi, DISCARD);
0ab02998 427 } else if (!f2fs_sb_mounted_blkzoned(sb)) {
09d54cdd
CY		 428 f2fs_msg(sb, KERN_WARNING,
429 "mounting with \"discard\" option, but "
430 "the device does not support discard");
431 }
696c018c 432 break;
64058be9 433 case Opt_nodiscard:
96ba2dec
DLM		 434 if (f2fs_sb_mounted_blkzoned(sb)) {
435 f2fs_msg(sb, KERN_WARNING,
436 "discard is required for zoned block devices");
437 return -EINVAL;
438 }
64058be9 439 clear_opt(sbi, DISCARD);
487df616 440 break;
696c018c
NJ		 441 case Opt_noheap:
442 set_opt(sbi, NOHEAP);
443 break;
7a20b8a6
JK		 444 case Opt_heap:
445 clear_opt(sbi, NOHEAP);
446 break;
696c018c 447#ifdef CONFIG_F2FS_FS_XATTR
4058c511
KA		 448 case Opt_user_xattr:
449 set_opt(sbi, XATTR_USER);
450 break;
696c018c
NJ		 451 case Opt_nouser_xattr:
452 clear_opt(sbi, XATTR_USER);
453 break;
444c580f
JK		 454 case Opt_inline_xattr:
455 set_opt(sbi, INLINE_XATTR);
456 break;
23cf7212
CY		 457 case Opt_noinline_xattr:
458 clear_opt(sbi, INLINE_XATTR);
459 break;
696c018c 460#else
4058c511
KA		 461 case Opt_user_xattr:
462 f2fs_msg(sb, KERN_INFO,
463 "user_xattr options not supported");
464 break;
696c018c
NJ		 465 case Opt_nouser_xattr:
466 f2fs_msg(sb, KERN_INFO,
467 "nouser_xattr options not supported");
468 break;
444c580f
JK		 469 case Opt_inline_xattr:
470 f2fs_msg(sb, KERN_INFO,
471 "inline_xattr options not supported");
472 break;
23cf7212
CY		 473 case Opt_noinline_xattr:
474 f2fs_msg(sb, KERN_INFO,
475 "noinline_xattr options not supported");
476 break;
696c018c
NJ		 477#endif
478#ifdef CONFIG_F2FS_FS_POSIX_ACL
4058c511
KA		 479 case Opt_acl:
480 set_opt(sbi, POSIX_ACL);
481 break;
696c018c
NJ		 482 case Opt_noacl:
483 clear_opt(sbi, POSIX_ACL);
484 break;
485#else
4058c511
KA		 486 case Opt_acl:
487 f2fs_msg(sb, KERN_INFO, "acl options not supported");
488 break;
696c018c
NJ		 489 case Opt_noacl:
490 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
491 break;
492#endif
493 case Opt_active_logs:
494 if (args->from && match_int(args, &arg))
495 return -EINVAL;
496 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
497 return -EINVAL;
498 sbi->active_logs = arg;
499 break;
500 case Opt_disable_ext_identify:
501 set_opt(sbi, DISABLE_EXT_IDENTIFY);
502 break;
8274de77
HL		 503 case Opt_inline_data:
504 set_opt(sbi, INLINE_DATA);
505 break;
5efd3c6f
CY		 506 case Opt_inline_dentry:
507 set_opt(sbi, INLINE_DENTRY);
508 break;
97c1794a
CY		 509 case Opt_noinline_dentry:
510 clear_opt(sbi, INLINE_DENTRY);
511 break;
6b4afdd7
JK		 512 case Opt_flush_merge:
513 set_opt(sbi, FLUSH_MERGE);
514 break;
69e9e427
JK		 515 case Opt_noflush_merge:
516 clear_opt(sbi, FLUSH_MERGE);
517 break;
0f7b2abd
JK		 518 case Opt_nobarrier:
519 set_opt(sbi, NOBARRIER);
520 break;
d5053a34
JK		 521 case Opt_fastboot:
522 set_opt(sbi, FASTBOOT);
523 break;
89672159
CY		 524 case Opt_extent_cache:
525 set_opt(sbi, EXTENT_CACHE);
526 break;
7daaea25
JK		 527 case Opt_noextent_cache:
528 clear_opt(sbi, EXTENT_CACHE);
529 break;
75342797
WL		 530 case Opt_noinline_data:
531 clear_opt(sbi, INLINE_DATA);
532 break;
343f40f0
CY		 533 case Opt_data_flush:
534 set_opt(sbi, DATA_FLUSH);
535 break;
36abef4e
JK		 536 case Opt_mode:
537 name = match_strdup(&args[0]);
538
539 if (!name)
540 return -ENOMEM;
541 if (strlen(name) == 8 &&
542 !strncmp(name, "adaptive", 8)) {
3adc57e9
DLM		 543 if (f2fs_sb_mounted_blkzoned(sb)) {
544 f2fs_msg(sb, KERN_WARNING,
545 "adaptive mode is not allowed with "
546 "zoned block device feature");
547 kfree(name);
548 return -EINVAL;
549 }
52763a4b 550 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
36abef4e
JK		 551 } else if (strlen(name) == 3 &&
552 !strncmp(name, "lfs", 3)) {
52763a4b 553 set_opt_mode(sbi, F2FS_MOUNT_LFS);
36abef4e
JK		 554 } else {
555 kfree(name);
556 return -EINVAL;
557 }
558 kfree(name);
559 break;
ec91538d
JK		 560 case Opt_io_size_bits:
561 if (args->from && match_int(args, &arg))
562 return -EINVAL;
563 if (arg > __ilog2_u32(BIO_MAX_PAGES)) {
564 f2fs_msg(sb, KERN_WARNING,
565 "Not support %d, larger than %d",
566 1 << arg, BIO_MAX_PAGES);
567 return -EINVAL;
568 }
569 sbi->write_io_size_bits = arg;
570 break;
73faec4d
JK		 571 case Opt_fault_injection:
572 if (args->from && match_int(args, &arg))
573 return -EINVAL;
574#ifdef CONFIG_F2FS_FAULT_INJECTION
1ecc0c5c 575 f2fs_build_fault_attr(sbi, arg);
0cc0dec2 576 set_opt(sbi, FAULT_INJECTION);
73faec4d
JK		 577#else
578 f2fs_msg(sb, KERN_INFO,
579 "FAULT_INJECTION was not selected");
580#endif
581 break;
6d94c74a
JK		 582 case Opt_lazytime:
583 sb->s_flags |= MS_LAZYTIME;
584 break;
585 case Opt_nolazytime:
586 sb->s_flags &= ~MS_LAZYTIME;
587 break;
696c018c
NJ		 588 default:
589 f2fs_msg(sb, KERN_ERR,
590 "Unrecognized mount option \"%s\" or missing value",
591 p);
592 return -EINVAL;
593 }
594 }
ec91538d
JK		 595
596 if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
597 f2fs_msg(sb, KERN_ERR,
598 "Should set mode=lfs with %uKB-sized IO",
599 F2FS_IO_SIZE_KB(sbi));
600 return -EINVAL;
601 }
696c018c
NJ		 602 return 0;
603}
604
aff063e2
JK		 605static struct inode *f2fs_alloc_inode(struct super_block *sb)
606{
607 struct f2fs_inode_info *fi;
608
a0acdfe0 609 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
aff063e2
JK		 610 if (!fi)
611 return NULL;
612
613 init_once((void *) fi);
614
434720fa 615 /* Initialize f2fs-specific inode info */
aff063e2 616 fi->vfs_inode.i_version = 1;
204706c7 617 atomic_set(&fi->dirty_pages, 0);
aff063e2
JK		 618 fi->i_current_depth = 1;
619 fi->i_advise = 0;
d928bfbf 620 init_rwsem(&fi->i_sem);
2710fd7e 621 INIT_LIST_HEAD(&fi->dirty_list);
0f18b462 622 INIT_LIST_HEAD(&fi->gdirty_list);
88b88a66
JK		 623 INIT_LIST_HEAD(&fi->inmem_pages);
624 mutex_init(&fi->inmem_lock);
82e0a5aa
CY		 625 init_rwsem(&fi->dio_rwsem[READ]);
626 init_rwsem(&fi->dio_rwsem[WRITE]);
aff063e2 627
ab9fa662
JK		 628 /* Will be used by directory only */
629 fi->i_dir_level = F2FS_SB(sb)->dir_level;
aff063e2
JK		 630 return &fi->vfs_inode;
631}
632
531ad7d5
JK		 633static int f2fs_drop_inode(struct inode *inode)
634{
b8d96a30 635 int ret;
531ad7d5
JK		 636 /*
637 * This is to avoid a deadlock condition like below.
638 * writeback_single_inode(inode)
639 * - f2fs_write_data_page
640 * - f2fs_gc -> iput -> evict
641 * - inode_wait_for_writeback(inode)
642 */
0f18b462 643 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
06e1bc05 644 if (!inode->i_nlink && !is_bad_inode(inode)) {
3e72f721
JK		 645 /* to avoid evict_inode call simultaneously */
646 atomic_inc(&inode->i_count);
06e1bc05
JK		 647 spin_unlock(&inode->i_lock);
648
649 /* some remained atomic pages should discarded */
650 if (f2fs_is_atomic_file(inode))
29b96b54 651 drop_inmem_pages(inode);
06e1bc05 652
3e72f721
JK		 653 /* should remain fi->extent_tree for writepage */
654 f2fs_destroy_extent_node(inode);
655
06e1bc05 656 sb_start_intwrite(inode->i_sb);
fc9581c8 657 f2fs_i_size_write(inode, 0);
06e1bc05
JK		 658
659 if (F2FS_HAS_BLOCKS(inode))
9a449e9c 660 f2fs_truncate(inode);
06e1bc05
JK		 661
662 sb_end_intwrite(inode->i_sb);
663
0b81d077 664 fscrypt_put_encryption_info(inode, NULL);
06e1bc05 665 spin_lock(&inode->i_lock);
3e72f721 666 atomic_dec(&inode->i_count);
06e1bc05 667 }
b8d96a30 668 trace_f2fs_drop_inode(inode, 0);
531ad7d5 669 return 0;
06e1bc05 670 }
b8d96a30
HP		 671 ret = generic_drop_inode(inode);
672 trace_f2fs_drop_inode(inode, ret);
673 return ret;
531ad7d5
JK		 674}
675
7c45729a 676int f2fs_inode_dirtied(struct inode *inode, bool sync)
b3783873 677{
0f18b462 678 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
7c45729a 679 int ret = 0;
0f18b462 680
0f18b462
JK		 681 spin_lock(&sbi->inode_lock[DIRTY_META]);
682 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
7c45729a
JK		 683 ret = 1;
684 } else {
685 set_inode_flag(inode, FI_DIRTY_INODE);
686 stat_inc_dirty_inode(sbi, DIRTY_META);
0f18b462 687 }
7c45729a
JK		 688 if (sync && list_empty(&F2FS_I(inode)->gdirty_list)) {
689 list_add_tail(&F2FS_I(inode)->gdirty_list,
0f18b462 690 &sbi->inode_list[DIRTY_META]);
7c45729a
JK		 691 inc_page_count(sbi, F2FS_DIRTY_IMETA);
692 }
338bbfa0 693 spin_unlock(&sbi->inode_lock[DIRTY_META]);
7c45729a 694 return ret;
0f18b462
JK		 695}
696
697void f2fs_inode_synced(struct inode *inode)
698{
699 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
700
701 spin_lock(&sbi->inode_lock[DIRTY_META]);
702 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
703 spin_unlock(&sbi->inode_lock[DIRTY_META]);
704 return;
705 }
7c45729a
JK		 706 if (!list_empty(&F2FS_I(inode)->gdirty_list)) {
707 list_del_init(&F2FS_I(inode)->gdirty_list);
708 dec_page_count(sbi, F2FS_DIRTY_IMETA);
709 }
0f18b462 710 clear_inode_flag(inode, FI_DIRTY_INODE);
26de9b11 711 clear_inode_flag(inode, FI_AUTO_RECOVER);
0f18b462 712 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
338bbfa0 713 spin_unlock(&sbi->inode_lock[DIRTY_META]);
b3783873
JK		 714}
715
b56ab837
JK		 716/*
717 * f2fs_dirty_inode() is called from __mark_inode_dirty()
718 *
719 * We should call set_dirty_inode to write the dirty inode through write_inode.
720 */
721static void f2fs_dirty_inode(struct inode *inode, int flags)
722{
723 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
724
725 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
726 inode->i_ino == F2FS_META_INO(sbi))
727 return;
728
729 if (flags == I_DIRTY_TIME)
730 return;
731
732 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
733 clear_inode_flag(inode, FI_AUTO_RECOVER);
734
7c45729a 735 f2fs_inode_dirtied(inode, false);
b56ab837
JK		 736}
737
aff063e2
JK		 738static void f2fs_i_callback(struct rcu_head *head)
739{
740 struct inode *inode = container_of(head, struct inode, i_rcu);
741 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
742}
743
25ca923b 744static void f2fs_destroy_inode(struct inode *inode)
aff063e2
JK		 745{
746 call_rcu(&inode->i_rcu, f2fs_i_callback);
747}
748
523be8a6
JK		 749static void destroy_percpu_info(struct f2fs_sb_info *sbi)
750{
41382ec4 751 percpu_counter_destroy(&sbi->alloc_valid_block_count);
513c5f37 752 percpu_counter_destroy(&sbi->total_valid_inode_count);
523be8a6
JK		 753}
754
3c62be17
JK		 755static void destroy_device_list(struct f2fs_sb_info *sbi)
756{
757 int i;
758
759 for (i = 0; i < sbi->s_ndevs; i++) {
760 blkdev_put(FDEV(i).bdev, FMODE_EXCL);
761#ifdef CONFIG_BLK_DEV_ZONED
762 kfree(FDEV(i).blkz_type);
763#endif
764 }
765 kfree(sbi->devs);
766}
767
aff063e2
JK		 768static void f2fs_put_super(struct super_block *sb)
769{
770 struct f2fs_sb_info *sbi = F2FS_SB(sb);
a912b54d 771 int i;
aff063e2 772
5e176d54
JK		 773 if (sbi->s_proc) {
774 remove_proc_entry("segment_info", sbi->s_proc);
f00d6fa7 775 remove_proc_entry("segment_bits", sbi->s_proc);
5e176d54
JK		 776 remove_proc_entry(sb->s_id, f2fs_proc_root);
777 }
b59d0bae 778 kobject_del(&sbi->s_kobj);
5e176d54 779
aff063e2
JK		 780 stop_gc_thread(sbi);
781
2658e50d
JK		 782 /* prevent remaining shrinker jobs */
783 mutex_lock(&sbi->umount_mutex);
784
85dc2f2c
JK		 785 /*
786 * We don't need to do checkpoint when superblock is clean.
787 * But, the previous checkpoint was not done by umount, it needs to do
788 * clean checkpoint again.
789 */
caf0047e 790 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
aaec2b1d 791 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
75ab4cb8
JK		 792 struct cp_control cpc = {
793 .reason = CP_UMOUNT,
794 };
795 write_checkpoint(sbi, &cpc);
796 }
aff063e2 797
4e6a8d9b 798 /* be sure to wait for any on-going discard commands */
d431413f 799 f2fs_wait_discard_bios(sbi);
4e6a8d9b 800
1f43e2ad
CY		 801 if (!sbi->discard_blks) {
802 struct cp_control cpc = {
803 .reason = CP_UMOUNT | CP_TRIMMED,
804 };
805 write_checkpoint(sbi, &cpc);
806 }
807
eca616f8
JK		 808 /* write_checkpoint can update stat informaion */
809 f2fs_destroy_stats(sbi);
810
cf779cab
JK		 811 /*
812 * normally superblock is clean, so we need to release this.
813 * In addition, EIO will skip do checkpoint, we need this as well.
814 */
74ef9241 815 release_ino_entry(sbi, true);
6f12ac25 816
2658e50d
JK		 817 f2fs_leave_shrinker(sbi);
818 mutex_unlock(&sbi->umount_mutex);
819
17c19120 820 /* our cp_error case, we can wait for any writeback page */
b9109b0e 821 f2fs_flush_merged_writes(sbi);
17c19120 822
aff063e2
JK		 823 iput(sbi->node_inode);
824 iput(sbi->meta_inode);
825
826 /* destroy f2fs internal modules */
827 destroy_node_manager(sbi);
828 destroy_segment_manager(sbi);
829
830 kfree(sbi->ckpt);
b59d0bae
NJ		 831 kobject_put(&sbi->s_kobj);
832 wait_for_completion(&sbi->s_kobj_unregister);
aff063e2
JK		 833
834 sb->s_fs_info = NULL;
43b6573b
KM		 835 if (sbi->s_chksum_driver)
836 crypto_free_shash(sbi->s_chksum_driver);
b39f0de2 837 kfree(sbi->raw_super);
523be8a6 838
3c62be17 839 destroy_device_list(sbi);
b6895e8f 840 mempool_destroy(sbi->write_io_dummy);
523be8a6 841 destroy_percpu_info(sbi);
a912b54d
JK		 842 for (i = 0; i < NR_PAGE_TYPE; i++)
843 kfree(sbi->write_io[i]);
aff063e2
JK		 844 kfree(sbi);
845}
846
847int f2fs_sync_fs(struct super_block *sb, int sync)
848{
849 struct f2fs_sb_info *sbi = F2FS_SB(sb);
c34f42e2 850 int err = 0;
aff063e2 851
a2a4a7e4
NJ		 852 trace_f2fs_sync_fs(sb, sync);
853
b7473754 854 if (sync) {
d5053a34
JK		 855 struct cp_control cpc;
856
119ee914
JK		 857 cpc.reason = __get_cp_reason(sbi);
858
b7473754 859 mutex_lock(&sbi->gc_mutex);
c34f42e2 860 err = write_checkpoint(sbi, &cpc);
b7473754 861 mutex_unlock(&sbi->gc_mutex);
b7473754 862 }
05ca3632 863 f2fs_trace_ios(NULL, 1);
aff063e2 864
c34f42e2 865 return err;
aff063e2
JK		 866}
867
d6212a5f
CL		 868static int f2fs_freeze(struct super_block *sb)
869{
77888c1e 870 if (f2fs_readonly(sb))
d6212a5f
CL		 871 return 0;
872
b4b9d34c
JK		 873 /* IO error happened before */
874 if (unlikely(f2fs_cp_error(F2FS_SB(sb))))
875 return -EIO;
876
877 /* must be clean, since sync_filesystem() was already called */
878 if (is_sbi_flag_set(F2FS_SB(sb), SBI_IS_DIRTY))
879 return -EINVAL;
880 return 0;
d6212a5f
CL		 881}
882
883static int f2fs_unfreeze(struct super_block *sb)
884{
885 return 0;
886}
887
aff063e2
JK		 888static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
889{
890 struct super_block *sb = dentry->d_sb;
891 struct f2fs_sb_info *sbi = F2FS_SB(sb);
892 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
893 block_t total_count, user_block_count, start_count, ovp_count;
894
895 total_count = le64_to_cpu(sbi->raw_super->block_count);
896 user_block_count = sbi->user_block_count;
897 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
898 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
899 buf->f_type = F2FS_SUPER_MAGIC;
900 buf->f_bsize = sbi->blocksize;
901
902 buf->f_blocks = total_count - start_count;
3e6d0b4d 903 buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count;
aff063e2
JK		 904 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
905
c200b1aa 906 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
b08b12d2
CY		 907 buf->f_ffree = min(buf->f_files - valid_node_count(sbi),
908 buf->f_bavail);
aff063e2 909
5a20d339 910 buf->f_namelen = F2FS_NAME_LEN;
aff063e2
JK		 911 buf->f_fsid.val[0] = (u32)id;
912 buf->f_fsid.val[1] = (u32)(id >> 32);
913
914 return 0;
915}
916
917static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
918{
919 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
920
6aefd93b
JK		 921 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
922 if (test_opt(sbi, FORCE_FG_GC))
923 seq_printf(seq, ",background_gc=%s", "sync");
924 else
925 seq_printf(seq, ",background_gc=%s", "on");
926 } else {
696c018c 927 seq_printf(seq, ",background_gc=%s", "off");
6aefd93b 928 }
aff063e2
JK		 929 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
930 seq_puts(seq, ",disable_roll_forward");
931 if (test_opt(sbi, DISCARD))
932 seq_puts(seq, ",discard");
933 if (test_opt(sbi, NOHEAP))
7a20b8a6
JK		 934 seq_puts(seq, ",no_heap");
935 else
936 seq_puts(seq, ",heap");
aff063e2
JK		 937#ifdef CONFIG_F2FS_FS_XATTR
938 if (test_opt(sbi, XATTR_USER))
939 seq_puts(seq, ",user_xattr");
940 else
941 seq_puts(seq, ",nouser_xattr");
444c580f
JK		 942 if (test_opt(sbi, INLINE_XATTR))
943 seq_puts(seq, ",inline_xattr");
23cf7212
CY		 944 else
945 seq_puts(seq, ",noinline_xattr");
aff063e2
JK		 946#endif
947#ifdef CONFIG_F2FS_FS_POSIX_ACL
948 if (test_opt(sbi, POSIX_ACL))
949 seq_puts(seq, ",acl");
950 else
951 seq_puts(seq, ",noacl");
952#endif
953 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
aa43507f 954 seq_puts(seq, ",disable_ext_identify");
8274de77
HL		 955 if (test_opt(sbi, INLINE_DATA))
956 seq_puts(seq, ",inline_data");
75342797
WL		 957 else
958 seq_puts(seq, ",noinline_data");
5efd3c6f
CY		 959 if (test_opt(sbi, INLINE_DENTRY))
960 seq_puts(seq, ",inline_dentry");
97c1794a
CY		 961 else
962 seq_puts(seq, ",noinline_dentry");
b270ad6f 963 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
6b4afdd7 964 seq_puts(seq, ",flush_merge");
0f7b2abd
JK		 965 if (test_opt(sbi, NOBARRIER))
966 seq_puts(seq, ",nobarrier");
d5053a34
JK		 967 if (test_opt(sbi, FASTBOOT))
968 seq_puts(seq, ",fastboot");
89672159
CY		 969 if (test_opt(sbi, EXTENT_CACHE))
970 seq_puts(seq, ",extent_cache");
7daaea25
JK		 971 else
972 seq_puts(seq, ",noextent_cache");
343f40f0
CY		 973 if (test_opt(sbi, DATA_FLUSH))
974 seq_puts(seq, ",data_flush");
36abef4e
JK		 975
976 seq_puts(seq, ",mode=");
977 if (test_opt(sbi, ADAPTIVE))
978 seq_puts(seq, "adaptive");
979 else if (test_opt(sbi, LFS))
980 seq_puts(seq, "lfs");
aff063e2 981 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
ec91538d
JK		 982 if (F2FS_IO_SIZE_BITS(sbi))
983 seq_printf(seq, ",io_size=%uKB", F2FS_IO_SIZE_KB(sbi));
0cc0dec2
KX		 984#ifdef CONFIG_F2FS_FAULT_INJECTION
985 if (test_opt(sbi, FAULT_INJECTION))
986 seq_puts(seq, ",fault_injection");
987#endif
aff063e2
JK		 988
989 return 0;
990}
991
5e176d54
JK		 992static int segment_info_seq_show(struct seq_file *seq, void *offset)
993{
994 struct super_block *sb = seq->private;
995 struct f2fs_sb_info *sbi = F2FS_SB(sb);
6c311ec6
CF		 996 unsigned int total_segs =
997 le32_to_cpu(sbi->raw_super->segment_count_main);
5e176d54
JK		 998 int i;
999
90aa6dc9
CY		 1000 seq_puts(seq, "format: segment_type|valid_blocks\n"
1001 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1002
5e176d54 1003 for (i = 0; i < total_segs; i++) {
90aa6dc9
CY		 1004 struct seg_entry *se = get_seg_entry(sbi, i);
1005
1006 if ((i % 10) == 0)
01a5ad82 1007 seq_printf(seq, "%-10d", i);
90aa6dc9 1008 seq_printf(seq, "%d|%-3u", se->type,
302bd348 1009 get_valid_blocks(sbi, i, false));
46c04366
GZ		 1010 if ((i % 10) == 9 || i == (total_segs - 1))
1011 seq_putc(seq, '\n');
5e176d54 1012 else
46c04366 1013 seq_putc(seq, ' ');
5e176d54 1014 }
46c04366 1015
5e176d54
JK		 1016 return 0;
1017}
1018
f00d6fa7
JK		 1019static int segment_bits_seq_show(struct seq_file *seq, void *offset)
1020{
1021 struct super_block *sb = seq->private;
1022 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1023 unsigned int total_segs =
1024 le32_to_cpu(sbi->raw_super->segment_count_main);
1025 int i, j;
1026
1027 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
1028 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
1029
1030 for (i = 0; i < total_segs; i++) {
1031 struct seg_entry *se = get_seg_entry(sbi, i);
1032
1033 seq_printf(seq, "%-10d", i);
1034 seq_printf(seq, "%d|%-3u|", se->type,
302bd348 1035 get_valid_blocks(sbi, i, false));
f00d6fa7 1036 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
d32853de 1037 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
f00d6fa7
JK		 1038 seq_putc(seq, '\n');
1039 }
1040 return 0;
1041}
1042
b7a15f3d
JK		 1043#define F2FS_PROC_FILE_DEF(_name) \
1044static int _name##_open_fs(struct inode *inode, struct file *file) \
1045{ \
1046 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
1047} \
1048 \
1049static const struct file_operations f2fs_seq_##_name##_fops = { \
b7a15f3d
JK		 1050 .open = _name##_open_fs, \
1051 .read = seq_read, \
1052 .llseek = seq_lseek, \
1053 .release = single_release, \
5e176d54
JK		 1054};
1055
b7a15f3d 1056F2FS_PROC_FILE_DEF(segment_info);
f00d6fa7 1057F2FS_PROC_FILE_DEF(segment_bits);
b7a15f3d 1058
498c5e9f
YH		 1059static void default_options(struct f2fs_sb_info *sbi)
1060{
1061 /* init some FS parameters */
1062 sbi->active_logs = NR_CURSEG_TYPE;
1063
1064 set_opt(sbi, BG_GC);
39133a50 1065 set_opt(sbi, INLINE_XATTR);
498c5e9f 1066 set_opt(sbi, INLINE_DATA);
97c1794a 1067 set_opt(sbi, INLINE_DENTRY);
3e72f721 1068 set_opt(sbi, EXTENT_CACHE);
7a20b8a6 1069 set_opt(sbi, NOHEAP);
6d94c74a 1070 sbi->sb->s_flags |= MS_LAZYTIME;
69e9e427 1071 set_opt(sbi, FLUSH_MERGE);
0bfd7a09 1072 if (f2fs_sb_mounted_blkzoned(sbi->sb)) {
52763a4b
JK		 1073 set_opt_mode(sbi, F2FS_MOUNT_LFS);
1074 set_opt(sbi, DISCARD);
1075 } else {
1076 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
1077 }
498c5e9f
YH		 1078
1079#ifdef CONFIG_F2FS_FS_XATTR
1080 set_opt(sbi, XATTR_USER);
1081#endif
1082#ifdef CONFIG_F2FS_FS_POSIX_ACL
1083 set_opt(sbi, POSIX_ACL);
1084#endif
36dbd328
CY		 1085
1086#ifdef CONFIG_F2FS_FAULT_INJECTION
1087 f2fs_build_fault_attr(sbi, 0);
1088#endif
498c5e9f
YH		 1089}
1090
696c018c
NJ		 1091static int f2fs_remount(struct super_block *sb, int *flags, char *data)
1092{
1093 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1094 struct f2fs_mount_info org_mount_opt;
1095 int err, active_logs;
876dc59e
GZ		 1096 bool need_restart_gc = false;
1097 bool need_stop_gc = false;
9cd81ce3 1098 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
2443b8b3
CY		 1099#ifdef CONFIG_F2FS_FAULT_INJECTION
1100 struct f2fs_fault_info ffi = sbi->fault_info;
1101#endif
696c018c
NJ		 1102
1103 /*
1104 * Save the old mount options in case we
1105 * need to restore them.
1106 */
1107 org_mount_opt = sbi->mount_opt;
1108 active_logs = sbi->active_logs;
1109
df728b0f
JK		 1110 /* recover superblocks we couldn't write due to previous RO mount */
1111 if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1112 err = f2fs_commit_super(sbi, false);
1113 f2fs_msg(sb, KERN_INFO,
1114 "Try to recover all the superblocks, ret: %d", err);
1115 if (!err)
1116 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1117 }
1118
26666c8a 1119 sbi->mount_opt.opt = 0;
498c5e9f 1120 default_options(sbi);
26666c8a 1121
696c018c
NJ		 1122 /* parse mount options */
1123 err = parse_options(sb, data);
1124 if (err)
1125 goto restore_opts;
1126
1127 /*
1128 * Previous and new state of filesystem is RO,
876dc59e 1129 * so skip checking GC and FLUSH_MERGE conditions.
696c018c 1130 */
6b2920a5 1131 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
696c018c
NJ		 1132 goto skip;
1133
9cd81ce3
CY		 1134 /* disallow enable/disable extent_cache dynamically */
1135 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1136 err = -EINVAL;
1137 f2fs_msg(sbi->sb, KERN_WARNING,
1138 "switch extent_cache option is not allowed");
1139 goto restore_opts;
1140 }
1141
696c018c
NJ		 1142 /*
1143 * We stop the GC thread if FS is mounted as RO
1144 * or if background_gc = off is passed in mount
1145 * option. Also sync the filesystem.
1146 */
1147 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
1148 if (sbi->gc_thread) {
1149 stop_gc_thread(sbi);
876dc59e 1150 need_restart_gc = true;
696c018c 1151 }
aba291b3 1152 } else if (!sbi->gc_thread) {
696c018c
NJ		 1153 err = start_gc_thread(sbi);
1154 if (err)
1155 goto restore_opts;
876dc59e
GZ		 1156 need_stop_gc = true;
1157 }
1158
faa0e55b
JK		 1159 if (*flags & MS_RDONLY) {
1160 writeback_inodes_sb(sb, WB_REASON_SYNC);
1161 sync_inodes_sb(sb);
1162
1163 set_sbi_flag(sbi, SBI_IS_DIRTY);
1164 set_sbi_flag(sbi, SBI_IS_CLOSE);
1165 f2fs_sync_fs(sb, 1);
1166 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1167 }
1168
876dc59e
GZ		 1169 /*
1170 * We stop issue flush thread if FS is mounted as RO
1171 * or if flush_merge is not passed in mount option.
1172 */
1173 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
5eba8c5d
JK		 1174 clear_opt(sbi, FLUSH_MERGE);
1175 destroy_flush_cmd_control(sbi, false);
1176 } else {
2163d198
GZ		 1177 err = create_flush_cmd_control(sbi);
1178 if (err)
a688b9d9 1179 goto restore_gc;
696c018c
NJ		 1180 }
1181skip:
1182 /* Update the POSIXACL Flag */
df728b0f 1183 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
696c018c 1184 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
df728b0f 1185
696c018c 1186 return 0;
876dc59e
GZ		 1187restore_gc:
1188 if (need_restart_gc) {
1189 if (start_gc_thread(sbi))
1190 f2fs_msg(sbi->sb, KERN_WARNING,
e1c42045 1191 "background gc thread has stopped");
876dc59e
GZ		 1192 } else if (need_stop_gc) {
1193 stop_gc_thread(sbi);
1194 }
696c018c
NJ		 1195restore_opts:
1196 sbi->mount_opt = org_mount_opt;
1197 sbi->active_logs = active_logs;
2443b8b3
CY		 1198#ifdef CONFIG_F2FS_FAULT_INJECTION
1199 sbi->fault_info = ffi;
1200#endif
696c018c
NJ		 1201 return err;
1202}
1203
aff063e2
JK		 1204static struct super_operations f2fs_sops = {
1205 .alloc_inode = f2fs_alloc_inode,
531ad7d5 1206 .drop_inode = f2fs_drop_inode,
aff063e2
JK		 1207 .destroy_inode = f2fs_destroy_inode,
1208 .write_inode = f2fs_write_inode,
b3783873 1209 .dirty_inode = f2fs_dirty_inode,
aff063e2
JK		 1210 .show_options = f2fs_show_options,
1211 .evict_inode = f2fs_evict_inode,
1212 .put_super = f2fs_put_super,
1213 .sync_fs = f2fs_sync_fs,
d6212a5f
CL		 1214 .freeze_fs = f2fs_freeze,
1215 .unfreeze_fs = f2fs_unfreeze,
aff063e2 1216 .statfs = f2fs_statfs,
696c018c 1217 .remount_fs = f2fs_remount,
aff063e2
JK		 1218};
1219
0b81d077
JK		 1220#ifdef CONFIG_F2FS_FS_ENCRYPTION
1221static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
1222{
1223 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1224 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1225 ctx, len, NULL);
1226}
1227
1228static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
1229 void *fs_data)
1230{
1231 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1232 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1233 ctx, len, fs_data, XATTR_CREATE);
1234}
1235
1236static unsigned f2fs_max_namelen(struct inode *inode)
1237{
1238 return S_ISLNK(inode->i_mode) ?
1239 inode->i_sb->s_blocksize : F2FS_NAME_LEN;
1240}
1241
6f69f0ed 1242static const struct fscrypt_operations f2fs_cryptops = {
a5d431ef 1243 .key_prefix = "f2fs:",
0b81d077
JK		 1244 .get_context = f2fs_get_context,
1245 .set_context = f2fs_set_context,
1246 .is_encrypted = f2fs_encrypted_inode,
1247 .empty_dir = f2fs_empty_dir,
1248 .max_namelen = f2fs_max_namelen,
1249};
1250#else
6f69f0ed 1251static const struct fscrypt_operations f2fs_cryptops = {
0b81d077
JK		 1252 .is_encrypted = f2fs_encrypted_inode,
1253};
1254#endif
1255
aff063e2
JK		 1256static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
1257 u64 ino, u32 generation)
1258{
1259 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1260 struct inode *inode;
1261
d6b7d4b3 1262 if (check_nid_range(sbi, ino))
910bb12d 1263 return ERR_PTR(-ESTALE);
aff063e2
JK		 1264
1265 /*
1266 * f2fs_iget isn't quite right if the inode is currently unallocated!
1267 * However f2fs_iget currently does appropriate checks to handle stale
1268 * inodes so everything is OK.
1269 */
1270 inode = f2fs_iget(sb, ino);
1271 if (IS_ERR(inode))
1272 return ERR_CAST(inode);
6bacf52f 1273 if (unlikely(generation && inode->i_generation != generation)) {
aff063e2
JK		 1274 /* we didn't find the right inode.. */
1275 iput(inode);
1276 return ERR_PTR(-ESTALE);
1277 }
1278 return inode;
1279}
1280
1281static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1282 int fh_len, int fh_type)
1283{
1284 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
1285 f2fs_nfs_get_inode);
1286}
1287
1288static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
1289 int fh_len, int fh_type)
1290{
1291 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
1292 f2fs_nfs_get_inode);
1293}
1294
1295static const struct export_operations f2fs_export_ops = {
1296 .fh_to_dentry = f2fs_fh_to_dentry,
1297 .fh_to_parent = f2fs_fh_to_parent,
1298 .get_parent = f2fs_get_parent,
1299};
1300
e0afc4d6 1301static loff_t max_file_blocks(void)
aff063e2 1302{
de93653f 1303 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
aff063e2
JK		 1304 loff_t leaf_count = ADDRS_PER_BLOCK;
1305
1306 /* two direct node blocks */
1307 result += (leaf_count * 2);
1308
1309 /* two indirect node blocks */
1310 leaf_count *= NIDS_PER_BLOCK;
1311 result += (leaf_count * 2);
1312
1313 /* one double indirect node block */
1314 leaf_count *= NIDS_PER_BLOCK;
1315 result += leaf_count;
1316
aff063e2
JK		 1317 return result;
1318}
1319
fd694733
JK		 1320static int __f2fs_commit_super(struct buffer_head *bh,
1321 struct f2fs_super_block *super)
1322{
1323 lock_buffer(bh);
1324 if (super)
1325 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
1326 set_buffer_uptodate(bh);
1327 set_buffer_dirty(bh);
1328 unlock_buffer(bh);
1329
1330 /* it's rare case, we can do fua all the time */
3adc5fcb 1331 return __sync_dirty_buffer(bh, REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
fd694733
JK		 1332}
1333
df728b0f 1334static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
fd694733 1335 struct buffer_head *bh)
9a59b62f 1336{
fd694733
JK		 1337 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1338 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 1339 struct super_block *sb = sbi->sb;
9a59b62f
CY		 1340 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1341 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
1342 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
1343 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
1344 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1345 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1346 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
1347 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
1348 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
1349 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
1350 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
1351 u32 segment_count = le32_to_cpu(raw_super->segment_count);
1352 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
fd694733
JK		 1353 u64 main_end_blkaddr = main_blkaddr +
1354 (segment_count_main << log_blocks_per_seg);
1355 u64 seg_end_blkaddr = segment0_blkaddr +
1356 (segment_count << log_blocks_per_seg);
9a59b62f
CY		 1357
1358 if (segment0_blkaddr != cp_blkaddr) {
1359 f2fs_msg(sb, KERN_INFO,
1360 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
1361 segment0_blkaddr, cp_blkaddr);
1362 return true;
1363 }
1364
1365 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
1366 sit_blkaddr) {
1367 f2fs_msg(sb, KERN_INFO,
1368 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
1369 cp_blkaddr, sit_blkaddr,
1370 segment_count_ckpt << log_blocks_per_seg);
1371 return true;
1372 }
1373
1374 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
1375 nat_blkaddr) {
1376 f2fs_msg(sb, KERN_INFO,
1377 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
1378 sit_blkaddr, nat_blkaddr,
1379 segment_count_sit << log_blocks_per_seg);
1380 return true;
1381 }
1382
1383 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
1384 ssa_blkaddr) {
1385 f2fs_msg(sb, KERN_INFO,
1386 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
1387 nat_blkaddr, ssa_blkaddr,
1388 segment_count_nat << log_blocks_per_seg);
1389 return true;
1390 }
1391
1392 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
1393 main_blkaddr) {
1394 f2fs_msg(sb, KERN_INFO,
1395 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
1396 ssa_blkaddr, main_blkaddr,
1397 segment_count_ssa << log_blocks_per_seg);
1398 return true;
1399 }
1400
fd694733 1401 if (main_end_blkaddr > seg_end_blkaddr) {
9a59b62f 1402 f2fs_msg(sb, KERN_INFO,
fd694733 1403 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
9a59b62f 1404 main_blkaddr,
fd694733
JK		 1405 segment0_blkaddr +
1406 (segment_count << log_blocks_per_seg),
9a59b62f
CY		 1407 segment_count_main << log_blocks_per_seg);
1408 return true;
fd694733
JK		 1409 } else if (main_end_blkaddr < seg_end_blkaddr) {
1410 int err = 0;
1411 char *res;
1412
1413 /* fix in-memory information all the time */
1414 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
1415 segment0_blkaddr) >> log_blocks_per_seg);
1416
1417 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
df728b0f 1418 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
fd694733
JK		 1419 res = "internally";
1420 } else {
1421 err = __f2fs_commit_super(bh, NULL);
1422 res = err ? "failed" : "done";
1423 }
1424 f2fs_msg(sb, KERN_INFO,
1425 "Fix alignment : %s, start(%u) end(%u) block(%u)",
1426 res, main_blkaddr,
1427 segment0_blkaddr +
1428 (segment_count << log_blocks_per_seg),
1429 segment_count_main << log_blocks_per_seg);
1430 if (err)
1431 return true;
9a59b62f 1432 }
9a59b62f
CY		 1433 return false;
1434}
1435
df728b0f 1436static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
fd694733 1437 struct buffer_head *bh)
aff063e2 1438{
fd694733
JK		 1439 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1440 (bh->b_data + F2FS_SUPER_OFFSET);
df728b0f 1441 struct super_block *sb = sbi->sb;
aff063e2
JK		 1442 unsigned int blocksize;
1443
a07ef784
NJ		 1444 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
1445 f2fs_msg(sb, KERN_INFO,
1446 "Magic Mismatch, valid(0x%x) - read(0x%x)",
1447 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
aff063e2 1448 return 1;
a07ef784 1449 }
aff063e2 1450
5c9b4692 1451 /* Currently, support only 4KB page cache size */
09cbfeaf 1452 if (F2FS_BLKSIZE != PAGE_SIZE) {
5c9b4692 1453 f2fs_msg(sb, KERN_INFO,
14d7e9de 1454 "Invalid page_cache_size (%lu), supports only 4KB\n",
09cbfeaf 1455 PAGE_SIZE);
5c9b4692 1456 return 1;
1457 }
1458
aff063e2
JK		 1459 /* Currently, support only 4KB block size */
1460 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
5c9b4692 1461 if (blocksize != F2FS_BLKSIZE) {
a07ef784
NJ		 1462 f2fs_msg(sb, KERN_INFO,
1463 "Invalid blocksize (%u), supports only 4KB\n",
1464 blocksize);
aff063e2 1465 return 1;
a07ef784 1466 }
5c9b4692 1467
9a59b62f
CY		 1468 /* check log blocks per segment */
1469 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
1470 f2fs_msg(sb, KERN_INFO,
1471 "Invalid log blocks per segment (%u)\n",
1472 le32_to_cpu(raw_super->log_blocks_per_seg));
1473 return 1;
1474 }
1475
55cf9cb6
CY		 1476 /* Currently, support 512/1024/2048/4096 bytes sector size */
1477 if (le32_to_cpu(raw_super->log_sectorsize) >
1478 F2FS_MAX_LOG_SECTOR_SIZE ||
1479 le32_to_cpu(raw_super->log_sectorsize) <
1480 F2FS_MIN_LOG_SECTOR_SIZE) {
1481 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
1482 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 1483 return 1;
a07ef784 1484 }
55cf9cb6
CY		 1485 if (le32_to_cpu(raw_super->log_sectors_per_block) +
1486 le32_to_cpu(raw_super->log_sectorsize) !=
1487 F2FS_MAX_LOG_SECTOR_SIZE) {
1488 f2fs_msg(sb, KERN_INFO,
1489 "Invalid log sectors per block(%u) log sectorsize(%u)",
1490 le32_to_cpu(raw_super->log_sectors_per_block),
1491 le32_to_cpu(raw_super->log_sectorsize));
aff063e2 1492 return 1;
a07ef784 1493 }
9a59b62f
CY		 1494
1495 /* check reserved ino info */
1496 if (le32_to_cpu(raw_super->node_ino) != 1 ||
1497 le32_to_cpu(raw_super->meta_ino) != 2 ||
1498 le32_to_cpu(raw_super->root_ino) != 3) {
1499 f2fs_msg(sb, KERN_INFO,
1500 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
1501 le32_to_cpu(raw_super->node_ino),
1502 le32_to_cpu(raw_super->meta_ino),
1503 le32_to_cpu(raw_super->root_ino));
1504 return 1;
1505 }
1506
b9dd4618
JQ		 1507 if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) {
1508 f2fs_msg(sb, KERN_INFO,
1509 "Invalid segment count (%u)",
1510 le32_to_cpu(raw_super->segment_count));
1511 return 1;
1512 }
1513
9a59b62f 1514 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
df728b0f 1515 if (sanity_check_area_boundary(sbi, bh))
9a59b62f
CY		 1516 return 1;
1517
aff063e2
JK		 1518 return 0;
1519}
1520
984ec63c 1521int sanity_check_ckpt(struct f2fs_sb_info *sbi)
aff063e2
JK		 1522{
1523 unsigned int total, fsmeta;
577e3495
JK		 1524 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1525 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
2040fce8 1526 unsigned int ovp_segments, reserved_segments;
15d3042a
JQ		 1527 unsigned int main_segs, blocks_per_seg;
1528 int i;
aff063e2
JK		 1529
1530 total = le32_to_cpu(raw_super->segment_count);
1531 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
1532 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
1533 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
1534 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
1535 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
1536
6bacf52f 1537 if (unlikely(fsmeta >= total))
aff063e2 1538 return 1;
577e3495 1539
2040fce8
JK		 1540 ovp_segments = le32_to_cpu(ckpt->overprov_segment_count);
1541 reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count);
1542
1543 if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
1544 ovp_segments == 0 || reserved_segments == 0)) {
1545 f2fs_msg(sbi->sb, KERN_ERR,
1546 "Wrong layout: check mkfs.f2fs version");
1547 return 1;
1548 }
1549
15d3042a
JQ		 1550 main_segs = le32_to_cpu(raw_super->segment_count_main);
1551 blocks_per_seg = sbi->blocks_per_seg;
1552
1553 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1554 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
1555 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
1556 return 1;
1557 }
1558 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1559 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
1560 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
1561 return 1;
1562 }
1563
1e968fdf 1564 if (unlikely(f2fs_cp_error(sbi))) {
577e3495
JK		 1565 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
1566 return 1;
1567 }
aff063e2
JK		 1568 return 0;
1569}
1570
1571static void init_sb_info(struct f2fs_sb_info *sbi)
1572{
1573 struct f2fs_super_block *raw_super = sbi->raw_super;
e41e6d75 1574 int i, j;
aff063e2
JK		 1575
1576 sbi->log_sectors_per_block =
1577 le32_to_cpu(raw_super->log_sectors_per_block);
1578 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
1579 sbi->blocksize = 1 << sbi->log_blocksize;
1580 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
1581 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
1582 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
1583 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
1584 sbi->total_sections = le32_to_cpu(raw_super->section_count);
1585 sbi->total_node_count =
1586 (le32_to_cpu(raw_super->segment_count_nat) / 2)
1587 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
1588 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
1589 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
1590 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
5ec4e49f 1591 sbi->cur_victim_sec = NULL_SECNO;
b1c57c1c 1592 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
aff063e2 1593
ab9fa662 1594 sbi->dir_level = DEF_DIR_LEVEL;
6beceb54 1595 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
d0239e1b 1596 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
caf0047e 1597 clear_sbi_flag(sbi, SBI_NEED_FSCK);
2658e50d 1598
35782b23
JK		 1599 for (i = 0; i < NR_COUNT_TYPE; i++)
1600 atomic_set(&sbi->nr_pages[i], 0);
1601
687de7f1
JK		 1602 atomic_set(&sbi->wb_sync_req, 0);
1603
2658e50d
JK		 1604 INIT_LIST_HEAD(&sbi->s_list);
1605 mutex_init(&sbi->umount_mutex);
e41e6d75
CY		 1606 for (i = 0; i < NR_PAGE_TYPE - 1; i++)
1607 for (j = HOT; j < NR_TEMP_TYPE; j++)
1608 mutex_init(&sbi->wio_mutex[i][j]);
aaec2b1d 1609 spin_lock_init(&sbi->cp_lock);
aff063e2
JK		 1610}
1611
523be8a6
JK		 1612static int init_percpu_info(struct f2fs_sb_info *sbi)
1613{
35782b23 1614 int err;
41382ec4 1615
513c5f37
JK		 1616 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
1617 if (err)
1618 return err;
1619
1620 return percpu_counter_init(&sbi->total_valid_inode_count, 0,
41382ec4 1621 GFP_KERNEL);
523be8a6
JK		 1622}
1623
178053e2 1624#ifdef CONFIG_BLK_DEV_ZONED
3c62be17 1625static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
178053e2 1626{
3c62be17 1627 struct block_device *bdev = FDEV(devi).bdev;
178053e2
DLM		 1628 sector_t nr_sectors = bdev->bd_part->nr_sects;
1629 sector_t sector = 0;
1630 struct blk_zone *zones;
1631 unsigned int i, nr_zones;
1632 unsigned int n = 0;
1633 int err = -EIO;
1634
1635 if (!f2fs_sb_mounted_blkzoned(sbi->sb))
1636 return 0;
1637
3c62be17 1638 if (sbi->blocks_per_blkz && sbi->blocks_per_blkz !=
f99e8648 1639 SECTOR_TO_BLOCK(bdev_zone_sectors(bdev)))
3c62be17 1640 return -EINVAL;
f99e8648 1641 sbi->blocks_per_blkz = SECTOR_TO_BLOCK(bdev_zone_sectors(bdev));
3c62be17
JK		 1642 if (sbi->log_blocks_per_blkz && sbi->log_blocks_per_blkz !=
1643 __ilog2_u32(sbi->blocks_per_blkz))
1644 return -EINVAL;
178053e2 1645 sbi->log_blocks_per_blkz = __ilog2_u32(sbi->blocks_per_blkz);
3c62be17
JK		 1646 FDEV(devi).nr_blkz = SECTOR_TO_BLOCK(nr_sectors) >>
1647 sbi->log_blocks_per_blkz;
f99e8648 1648 if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
3c62be17 1649 FDEV(devi).nr_blkz++;
178053e2 1650
3c62be17
JK		 1651 FDEV(devi).blkz_type = kmalloc(FDEV(devi).nr_blkz, GFP_KERNEL);
1652 if (!FDEV(devi).blkz_type)
178053e2
DLM		 1653 return -ENOMEM;
1654
1655#define F2FS_REPORT_NR_ZONES 4096
1656
1657 zones = kcalloc(F2FS_REPORT_NR_ZONES, sizeof(struct blk_zone),
1658 GFP_KERNEL);
1659 if (!zones)
1660 return -ENOMEM;
1661
1662 /* Get block zones type */
1663 while (zones && sector < nr_sectors) {
1664
1665 nr_zones = F2FS_REPORT_NR_ZONES;
1666 err = blkdev_report_zones(bdev, sector,
1667 zones, &nr_zones,
1668 GFP_KERNEL);
1669 if (err)
1670 break;
1671 if (!nr_zones) {
1672 err = -EIO;
1673 break;
1674 }
1675
1676 for (i = 0; i < nr_zones; i++) {
3c62be17 1677 FDEV(devi).blkz_type[n] = zones[i].type;
178053e2
DLM		 1678 sector += zones[i].len;
1679 n++;
1680 }
1681 }
1682
1683 kfree(zones);
1684
1685 return err;
1686}
1687#endif
1688
9076a75f
GZ		 1689/*
1690 * Read f2fs raw super block.
2b39e907
SL		 1691 * Because we have two copies of super block, so read both of them
1692 * to get the first valid one. If any one of them is broken, we pass
1693 * them recovery flag back to the caller.
9076a75f 1694 */
df728b0f 1695static int read_raw_super_block(struct f2fs_sb_info *sbi,
9076a75f 1696 struct f2fs_super_block **raw_super,
e8240f65 1697 int *valid_super_block, int *recovery)
14d7e9de 1698{
df728b0f 1699 struct super_block *sb = sbi->sb;
2b39e907 1700 int block;
e8240f65 1701 struct buffer_head *bh;
fd694733 1702 struct f2fs_super_block *super;
da554e48 1703 int err = 0;
14d7e9de 1704
b39f0de2
YH		 1705 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
1706 if (!super)
1707 return -ENOMEM;
2b39e907
SL		 1708
1709 for (block = 0; block < 2; block++) {
1710 bh = sb_bread(sb, block);
1711 if (!bh) {
1712 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
9076a75f 1713 block + 1);
2b39e907
SL		 1714 err = -EIO;
1715 continue;
1716 }
14d7e9de 1717
2b39e907 1718 /* sanity checking of raw super */
df728b0f 1719 if (sanity_check_raw_super(sbi, bh)) {
2b39e907
SL		 1720 f2fs_msg(sb, KERN_ERR,
1721 "Can't find valid F2FS filesystem in %dth superblock",
1722 block + 1);
1723 err = -EINVAL;
1724 brelse(bh);
1725 continue;
1726 }
14d7e9de 1727
2b39e907 1728 if (!*raw_super) {
fd694733
JK		 1729 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
1730 sizeof(*super));
2b39e907
SL		 1731 *valid_super_block = block;
1732 *raw_super = super;
1733 }
1734 brelse(bh);
da554e48 1735 }
1736
2b39e907
SL		 1737 /* Fail to read any one of the superblocks*/
1738 if (err < 0)
1739 *recovery = 1;
da554e48 1740
da554e48 1741 /* No valid superblock */
2b39e907 1742 if (!*raw_super)
b39f0de2 1743 kfree(super);
2b39e907
SL		 1744 else
1745 err = 0;
da554e48 1746
2b39e907 1747 return err;
14d7e9de 1748}
1749
fd694733 1750int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
26d815ad 1751{
5d909cdb 1752 struct buffer_head *bh;
26d815ad
JK		 1753 int err;
1754
df728b0f
JK		 1755 if ((recover && f2fs_readonly(sbi->sb)) ||
1756 bdev_read_only(sbi->sb->s_bdev)) {
1757 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
f2353d7b 1758 return -EROFS;
df728b0f 1759 }
f2353d7b 1760
fd694733
JK		 1761 /* write back-up superblock first */
1762 bh = sb_getblk(sbi->sb, sbi->valid_super_block ? 0: 1);
5d909cdb
JK		 1763 if (!bh)
1764 return -EIO;
fd694733 1765 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
5d909cdb 1766 brelse(bh);
c5bda1c8
CY		 1767
1768 /* if we are in recovery path, skip writing valid superblock */
1769 if (recover || err)
5d909cdb 1770 return err;
26d815ad
JK		 1771
1772 /* write current valid superblock */
fd694733
JK		 1773 bh = sb_getblk(sbi->sb, sbi->valid_super_block);
1774 if (!bh)
1775 return -EIO;
1776 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
1777 brelse(bh);
1778 return err;
26d815ad
JK		 1779}
1780
3c62be17
JK		 1781static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
1782{
1783 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
7bb3a371 1784 unsigned int max_devices = MAX_DEVICES;
3c62be17
JK		 1785 int i;
1786
7bb3a371
MS		 1787 /* Initialize single device information */
1788 if (!RDEV(0).path[0]) {
1789 if (!bdev_is_zoned(sbi->sb->s_bdev))
3c62be17 1790 return 0;
7bb3a371
MS		 1791 max_devices = 1;
1792 }
3c62be17 1793
7bb3a371
MS		 1794 /*
1795 * Initialize multiple devices information, or single
1796 * zoned block device information.
1797 */
1798 sbi->devs = kcalloc(max_devices, sizeof(struct f2fs_dev_info),
1799 GFP_KERNEL);
1800 if (!sbi->devs)
1801 return -ENOMEM;
3c62be17 1802
7bb3a371 1803 for (i = 0; i < max_devices; i++) {
3c62be17 1804
7bb3a371
MS		 1805 if (i > 0 && !RDEV(i).path[0])
1806 break;
1807
1808 if (max_devices == 1) {
1809 /* Single zoned block device mount */
1810 FDEV(0).bdev =
1811 blkdev_get_by_dev(sbi->sb->s_bdev->bd_dev,
3c62be17 1812 sbi->sb->s_mode, sbi->sb->s_type);
7bb3a371
MS		 1813 } else {
1814 /* Multi-device mount */
1815 memcpy(FDEV(i).path, RDEV(i).path, MAX_PATH_LEN);
1816 FDEV(i).total_segments =
1817 le32_to_cpu(RDEV(i).total_segments);
1818 if (i == 0) {
1819 FDEV(i).start_blk = 0;
1820 FDEV(i).end_blk = FDEV(i).start_blk +
1821 (FDEV(i).total_segments <<
1822 sbi->log_blocks_per_seg) - 1 +
1823 le32_to_cpu(raw_super->segment0_blkaddr);
1824 } else {
1825 FDEV(i).start_blk = FDEV(i - 1).end_blk + 1;
1826 FDEV(i).end_blk = FDEV(i).start_blk +
1827 (FDEV(i).total_segments <<
1828 sbi->log_blocks_per_seg) - 1;
1829 }
1830 FDEV(i).bdev = blkdev_get_by_path(FDEV(i).path,
3c62be17 1831 sbi->sb->s_mode, sbi->sb->s_type);
7bb3a371 1832 }
3c62be17
JK		 1833 if (IS_ERR(FDEV(i).bdev))
1834 return PTR_ERR(FDEV(i).bdev);
1835
1836 /* to release errored devices */
1837 sbi->s_ndevs = i + 1;
1838
1839#ifdef CONFIG_BLK_DEV_ZONED
1840 if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
1841 !f2fs_sb_mounted_blkzoned(sbi->sb)) {
1842 f2fs_msg(sbi->sb, KERN_ERR,
1843 "Zoned block device feature not enabled\n");
1844 return -EINVAL;
1845 }
1846 if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
1847 if (init_blkz_info(sbi, i)) {
1848 f2fs_msg(sbi->sb, KERN_ERR,
1849 "Failed to initialize F2FS blkzone information");
1850 return -EINVAL;
1851 }
7bb3a371
MS		 1852 if (max_devices == 1)
1853 break;
3c62be17
JK		 1854 f2fs_msg(sbi->sb, KERN_INFO,
1855 "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
1856 i, FDEV(i).path,
1857 FDEV(i).total_segments,
1858 FDEV(i).start_blk, FDEV(i).end_blk,
1859 bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
1860 "Host-aware" : "Host-managed");
1861 continue;
1862 }
1863#endif
1864 f2fs_msg(sbi->sb, KERN_INFO,
1865 "Mount Device [%2d]: %20s, %8u, %8x - %8x",
1866 i, FDEV(i).path,
1867 FDEV(i).total_segments,
1868 FDEV(i).start_blk, FDEV(i).end_blk);
1869 }
0a595eba
JK		 1870 f2fs_msg(sbi->sb, KERN_INFO,
1871 "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
3c62be17
JK		 1872 return 0;
1873}
1874
aff063e2
JK		 1875static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
1876{
1877 struct f2fs_sb_info *sbi;
da554e48 1878 struct f2fs_super_block *raw_super;
aff063e2 1879 struct inode *root;
99e3e858 1880 int err;
2adc3505 1881 bool retry = true, need_fsck = false;
dabc4a5c 1882 char *options = NULL;
e8240f65 1883 int recovery, i, valid_super_block;
8f1dbbbb 1884 struct curseg_info *seg_i;
aff063e2 1885
ed2e621a 1886try_onemore:
da554e48 1887 err = -EINVAL;
1888 raw_super = NULL;
e8240f65 1889 valid_super_block = -1;
da554e48 1890 recovery = 0;
1891
aff063e2
JK		 1892 /* allocate memory for f2fs-specific super block info */
1893 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
1894 if (!sbi)
1895 return -ENOMEM;
1896
df728b0f
JK		 1897 sbi->sb = sb;
1898
43b6573b
KM		 1899 /* Load the checksum driver */
1900 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
1901 if (IS_ERR(sbi->s_chksum_driver)) {
1902 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
1903 err = PTR_ERR(sbi->s_chksum_driver);
1904 sbi->s_chksum_driver = NULL;
1905 goto free_sbi;
1906 }
1907
ff9234ad 1908 /* set a block size */
6bacf52f 1909 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
a07ef784 1910 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
aff063e2 1911 goto free_sbi;
a07ef784 1912 }
aff063e2 1913
df728b0f 1914 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
e8240f65 1915 &recovery);
9076a75f
GZ		 1916 if (err)
1917 goto free_sbi;
1918
5fb08372 1919 sb->s_fs_info = sbi;
52763a4b
JK		 1920 sbi->raw_super = raw_super;
1921
d1b959c8
DLM		 1922 /*
1923 * The BLKZONED feature indicates that the drive was formatted with
1924 * zone alignment optimization. This is optional for host-aware
1925 * devices, but mandatory for host-managed zoned block devices.
1926 */
1927#ifndef CONFIG_BLK_DEV_ZONED
1928 if (f2fs_sb_mounted_blkzoned(sb)) {
1929 f2fs_msg(sb, KERN_ERR,
1930 "Zoned block device support is not enabled\n");
1931 goto free_sb_buf;
1932 }
d1b959c8 1933#endif
498c5e9f 1934 default_options(sbi);
aff063e2 1935 /* parse mount options */
dabc4a5c
JK		 1936 options = kstrdup((const char *)data, GFP_KERNEL);
1937 if (data && !options) {
1938 err = -ENOMEM;
aff063e2 1939 goto free_sb_buf;
dabc4a5c
JK		 1940 }
1941
1942 err = parse_options(sb, options);
1943 if (err)
1944 goto free_options;
aff063e2 1945
e0afc4d6
CY		 1946 sbi->max_file_blocks = max_file_blocks();
1947 sb->s_maxbytes = sbi->max_file_blocks <<
1948 le32_to_cpu(raw_super->log_blocksize);
aff063e2
JK		 1949 sb->s_max_links = F2FS_LINK_MAX;
1950 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1951
1952 sb->s_op = &f2fs_sops;
0b81d077 1953 sb->s_cop = &f2fs_cryptops;
aff063e2
JK		 1954 sb->s_xattr = f2fs_xattr_handlers;
1955 sb->s_export_op = &f2fs_export_ops;
1956 sb->s_magic = F2FS_SUPER_MAGIC;
aff063e2
JK		 1957 sb->s_time_gran = 1;
1958 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1959 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1960 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1961
1962 /* init f2fs-specific super block info */
e8240f65 1963 sbi->valid_super_block = valid_super_block;
aff063e2 1964 mutex_init(&sbi->gc_mutex);
aff063e2 1965 mutex_init(&sbi->cp_mutex);
b3582c68 1966 init_rwsem(&sbi->node_write);
59c9081b 1967 init_rwsem(&sbi->node_change);
315df839
JK		 1968
1969 /* disallow all the data/node/meta page writes */
1970 set_sbi_flag(sbi, SBI_POR_DOING);
aff063e2 1971 spin_lock_init(&sbi->stat_lock);
971767ca 1972
458e6197 1973 for (i = 0; i < NR_PAGE_TYPE; i++) {
a912b54d
JK		 1974 int n = (i == META) ? 1: NR_TEMP_TYPE;
1975 int j;
1976
1977 sbi->write_io[i] = kmalloc(n * sizeof(struct f2fs_bio_info),
1978 GFP_KERNEL);
1979 if (!sbi->write_io[i])
1980 goto free_options;
1981
1982 for (j = HOT; j < n; j++) {
1983 init_rwsem(&sbi->write_io[i][j].io_rwsem);
1984 sbi->write_io[i][j].sbi = sbi;
1985 sbi->write_io[i][j].bio = NULL;
fb830fc5
CY		 1986 spin_lock_init(&sbi->write_io[i][j].io_lock);
1987 INIT_LIST_HEAD(&sbi->write_io[i][j].io_list);
a912b54d 1988 }
458e6197 1989 }
971767ca 1990
b873b798 1991 init_rwsem(&sbi->cp_rwsem);
fb51b5ef 1992 init_waitqueue_head(&sbi->cp_wait);
aff063e2
JK		 1993 init_sb_info(sbi);
1994
523be8a6
JK		 1995 err = init_percpu_info(sbi);
1996 if (err)
1997 goto free_options;
1998
0a595eba
JK		 1999 if (F2FS_IO_SIZE(sbi) > 1) {
2000 sbi->write_io_dummy =
a3ebfe4f 2001 mempool_create_page_pool(2 * (F2FS_IO_SIZE(sbi) - 1), 0);
0a595eba
JK		 2002 if (!sbi->write_io_dummy)
2003 goto free_options;
2004 }
2005
aff063e2
JK		 2006 /* get an inode for meta space */
2007 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
2008 if (IS_ERR(sbi->meta_inode)) {
a07ef784 2009 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
aff063e2 2010 err = PTR_ERR(sbi->meta_inode);
0a595eba 2011 goto free_io_dummy;
aff063e2
JK		 2012 }
2013
2014 err = get_valid_checkpoint(sbi);
a07ef784
NJ		 2015 if (err) {
2016 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
aff063e2 2017 goto free_meta_inode;
a07ef784 2018 }
aff063e2 2019
3c62be17
JK		 2020 /* Initialize device list */
2021 err = f2fs_scan_devices(sbi);
2022 if (err) {
2023 f2fs_msg(sb, KERN_ERR, "Failed to find devices");
2024 goto free_devices;
2025 }
2026
aff063e2
JK		 2027 sbi->total_valid_node_count =
2028 le32_to_cpu(sbi->ckpt->valid_node_count);
513c5f37
JK		 2029 percpu_counter_set(&sbi->total_valid_inode_count,
2030 le32_to_cpu(sbi->ckpt->valid_inode_count));
aff063e2
JK		 2031 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
2032 sbi->total_valid_block_count =
2033 le64_to_cpu(sbi->ckpt->valid_block_count);
2034 sbi->last_valid_block_count = sbi->total_valid_block_count;
41382ec4 2035
c227f912
CY		 2036 for (i = 0; i < NR_INODE_TYPE; i++) {
2037 INIT_LIST_HEAD(&sbi->inode_list[i]);
2038 spin_lock_init(&sbi->inode_lock[i]);
2039 }
aff063e2 2040
1dcc336b
CY		 2041 init_extent_cache_info(sbi);
2042
6451e041 2043 init_ino_entry_info(sbi);
aff063e2
JK		 2044
2045 /* setup f2fs internal modules */
2046 err = build_segment_manager(sbi);
a07ef784
NJ		 2047 if (err) {
2048 f2fs_msg(sb, KERN_ERR,
2049 "Failed to initialize F2FS segment manager");
aff063e2 2050 goto free_sm;
a07ef784 2051 }
aff063e2 2052 err = build_node_manager(sbi);
a07ef784
NJ		 2053 if (err) {
2054 f2fs_msg(sb, KERN_ERR,
2055 "Failed to initialize F2FS node manager");
aff063e2 2056 goto free_nm;
a07ef784 2057 }
aff063e2 2058
8f1dbbbb
SL		 2059 /* For write statistics */
2060 if (sb->s_bdev->bd_part)
2061 sbi->sectors_written_start =
2062 (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]);
2063
2064 /* Read accumulated write IO statistics if exists */
2065 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
2066 if (__exist_node_summaries(sbi))
2067 sbi->kbytes_written =
b2dde6fc 2068 le64_to_cpu(seg_i->journal->info.kbytes_written);
8f1dbbbb 2069
aff063e2
JK		 2070 build_gc_manager(sbi);
2071
2072 /* get an inode for node space */
2073 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
2074 if (IS_ERR(sbi->node_inode)) {
a07ef784 2075 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
aff063e2
JK		 2076 err = PTR_ERR(sbi->node_inode);
2077 goto free_nm;
2078 }
2079
2658e50d
JK		 2080 f2fs_join_shrinker(sbi);
2081
aa51d08a
JK		 2082 err = f2fs_build_stats(sbi);
2083 if (err)
2084 goto free_nm;
2085
aff063e2 2086 /* if there are nt orphan nodes free them */
8c14bfad
CY		 2087 err = recover_orphan_inodes(sbi);
2088 if (err)
2089 goto free_node_inode;
aff063e2
JK		 2090
2091 /* read root inode and dentry */
2092 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
2093 if (IS_ERR(root)) {
a07ef784 2094 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
aff063e2
JK		 2095 err = PTR_ERR(root);
2096 goto free_node_inode;
2097 }
8f99a946 2098 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
9d847950 2099 iput(root);
8f99a946 2100 err = -EINVAL;
9d847950 2101 goto free_node_inode;
8f99a946 2102 }
aff063e2
JK		 2103
2104 sb->s_root = d_make_root(root); /* allocate root dentry */
2105 if (!sb->s_root) {
2106 err = -ENOMEM;
2107 goto free_root_inode;
2108 }
2109
5e176d54
JK		 2110 if (f2fs_proc_root)
2111 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
2112
f00d6fa7 2113 if (sbi->s_proc) {
5e176d54
JK		 2114 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
2115 &f2fs_seq_segment_info_fops, sb);
f00d6fa7
JK		 2116 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
2117 &f2fs_seq_segment_bits_fops, sb);
2118 }
5e176d54 2119
b59d0bae
NJ		 2120 sbi->s_kobj.kset = f2fs_kset;
2121 init_completion(&sbi->s_kobj_unregister);
2122 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
2123 "%s", sb->s_id);
2124 if (err)
6437d1b0 2125 goto free_proc;
b59d0bae 2126
6437d1b0
JK		 2127 /* recover fsynced data */
2128 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
081d78c2
JK		 2129 /*
2130 * mount should be failed, when device has readonly mode, and
2131 * previous checkpoint was not done by clean system shutdown.
2132 */
2133 if (bdev_read_only(sb->s_bdev) &&
aaec2b1d 2134 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
081d78c2
JK		 2135 err = -EROFS;
2136 goto free_kobj;
2137 }
2adc3505
CY		 2138
2139 if (need_fsck)
2140 set_sbi_flag(sbi, SBI_NEED_FSCK);
2141
a468f0ef
JK		 2142 if (!retry)
2143 goto skip_recovery;
2144
6781eabb
JK		 2145 err = recover_fsync_data(sbi, false);
2146 if (err < 0) {
2adc3505 2147 need_fsck = true;
6437d1b0 2148 f2fs_msg(sb, KERN_ERR,
99e3e858 2149 "Cannot recover all fsync data errno=%d", err);
ed2e621a
JK		 2150 goto free_kobj;
2151 }
6781eabb
JK		 2152 } else {
2153 err = recover_fsync_data(sbi, true);
2154
2155 if (!f2fs_readonly(sb) && err > 0) {
2156 err = -EINVAL;
2157 f2fs_msg(sb, KERN_ERR,
2158 "Need to recover fsync data");
2159 goto free_kobj;
2160 }
6437d1b0 2161 }
a468f0ef 2162skip_recovery:
315df839
JK		 2163 /* recover_fsync_data() cleared this already */
2164 clear_sbi_flag(sbi, SBI_POR_DOING);
b59d0bae 2165
6437d1b0
JK		 2166 /*
2167 * If filesystem is not mounted as read-only then
2168 * do start the gc_thread.
2169 */
6c029932 2170 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
6437d1b0
JK		 2171 /* After POR, we can run background GC thread.*/
2172 err = start_gc_thread(sbi);
2173 if (err)
2174 goto free_kobj;
2175 }
dabc4a5c 2176 kfree(options);
da554e48 2177
2178 /* recover broken superblock */
f2353d7b 2179 if (recovery) {
41214b3c
CY		 2180 err = f2fs_commit_super(sbi, true);
2181 f2fs_msg(sb, KERN_INFO,
99e3e858 2182 "Try to recover %dth superblock, ret: %d",
41214b3c 2183 sbi->valid_super_block ? 1 : 2, err);
da554e48 2184 }
2185
1200abb2
JK		 2186 f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
2187 cur_cp_version(F2FS_CKPT(sbi)));
6beceb54 2188 f2fs_update_time(sbi, CP_TIME);
d0239e1b 2189 f2fs_update_time(sbi, REQ_TIME);
aff063e2 2190 return 0;
6437d1b0
JK		 2191
2192free_kobj:
0f18b462 2193 f2fs_sync_inode_meta(sbi);
6437d1b0 2194 kobject_del(&sbi->s_kobj);
29ba108d
CY		 2195 kobject_put(&sbi->s_kobj);
2196 wait_for_completion(&sbi->s_kobj_unregister);
6437d1b0 2197free_proc:
1d15bd20
CY		 2198 if (sbi->s_proc) {
2199 remove_proc_entry("segment_info", sbi->s_proc);
f00d6fa7 2200 remove_proc_entry("segment_bits", sbi->s_proc);
1d15bd20
CY		 2201 remove_proc_entry(sb->s_id, f2fs_proc_root);
2202 }
aff063e2
JK		 2203free_root_inode:
2204 dput(sb->s_root);
2205 sb->s_root = NULL;
2206free_node_inode:
bb5dada7 2207 truncate_inode_pages_final(NODE_MAPPING(sbi));
2658e50d 2208 mutex_lock(&sbi->umount_mutex);
d41065e2 2209 release_ino_entry(sbi, true);
2658e50d 2210 f2fs_leave_shrinker(sbi);
09922800
JK		 2211 /*
2212 * Some dirty meta pages can be produced by recover_orphan_inodes()
2213 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
2214 * followed by write_checkpoint() through f2fs_write_node_pages(), which
2215 * falls into an infinite loop in sync_meta_pages().
2216 */
2217 truncate_inode_pages_final(META_MAPPING(sbi));
aff063e2 2218 iput(sbi->node_inode);
2658e50d 2219 mutex_unlock(&sbi->umount_mutex);
aa51d08a 2220 f2fs_destroy_stats(sbi);
aff063e2
JK		 2221free_nm:
2222 destroy_node_manager(sbi);
2223free_sm:
2224 destroy_segment_manager(sbi);
3c62be17
JK		 2225free_devices:
2226 destroy_device_list(sbi);
aff063e2
JK		 2227 kfree(sbi->ckpt);
2228free_meta_inode:
2229 make_bad_inode(sbi->meta_inode);
2230 iput(sbi->meta_inode);
0a595eba
JK		 2231free_io_dummy:
2232 mempool_destroy(sbi->write_io_dummy);
dabc4a5c 2233free_options:
a912b54d
JK		 2234 for (i = 0; i < NR_PAGE_TYPE; i++)
2235 kfree(sbi->write_io[i]);
523be8a6 2236 destroy_percpu_info(sbi);
dabc4a5c 2237 kfree(options);
aff063e2 2238free_sb_buf:
b39f0de2 2239 kfree(raw_super);
aff063e2 2240free_sbi:
43b6573b
KM		 2241 if (sbi->s_chksum_driver)
2242 crypto_free_shash(sbi->s_chksum_driver);
aff063e2 2243 kfree(sbi);
ed2e621a
JK		 2244
2245 /* give only one another chance */
2246 if (retry) {
9df47ba7 2247 retry = false;
ed2e621a
JK		 2248 shrink_dcache_sb(sb);
2249 goto try_onemore;
2250 }
aff063e2
JK		 2251 return err;
2252}
2253
2254static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
2255 const char *dev_name, void *data)
2256{
2257 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
2258}
2259
30a5537f
JK		 2260static void kill_f2fs_super(struct super_block *sb)
2261{
2262 if (sb->s_root)
caf0047e 2263 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
30a5537f
JK		 2264 kill_block_super(sb);
2265}
2266
aff063e2
JK		 2267static struct file_system_type f2fs_fs_type = {
2268 .owner = THIS_MODULE,
2269 .name = "f2fs",
2270 .mount = f2fs_mount,
30a5537f 2271 .kill_sb = kill_f2fs_super,
aff063e2
JK		 2272 .fs_flags = FS_REQUIRES_DEV,
2273};
7f78e035 2274MODULE_ALIAS_FS("f2fs");
aff063e2 2275
6e6093a8 2276static int __init init_inodecache(void)
aff063e2 2277{
5d097056
VD		 2278 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
2279 sizeof(struct f2fs_inode_info), 0,
2280 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
6bacf52f 2281 if (!f2fs_inode_cachep)
aff063e2
JK		 2282 return -ENOMEM;
2283 return 0;
2284}
2285
2286static void destroy_inodecache(void)
2287{
2288 /*
2289 * Make sure all delayed rcu free inodes are flushed before we
2290 * destroy cache.
2291 */
2292 rcu_barrier();
2293 kmem_cache_destroy(f2fs_inode_cachep);
2294}
2295
2296static int __init init_f2fs_fs(void)
2297{
2298 int err;
2299
c0508650
JK		 2300 f2fs_build_trace_ios();
2301
aff063e2
JK		 2302 err = init_inodecache();
2303 if (err)
2304 goto fail;
2305 err = create_node_manager_caches();
2306 if (err)
9890ff3f 2307 goto free_inodecache;
7fd9e544 2308 err = create_segment_manager_caches();
aff063e2 2309 if (err)
9890ff3f 2310 goto free_node_manager_caches;
aff063e2
JK		 2311 err = create_checkpoint_caches();
2312 if (err)
06292073 2313 goto free_segment_manager_caches;
1dcc336b
CY		 2314 err = create_extent_cache();
2315 if (err)
2316 goto free_checkpoint_caches;
b59d0bae 2317 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
6e6b978c
WY		 2318 if (!f2fs_kset) {
2319 err = -ENOMEM;
1dcc336b 2320 goto free_extent_cache;
6e6b978c 2321 }
2658e50d 2322 err = register_shrinker(&f2fs_shrinker_info);
cfc4d971 2323 if (err)
0b81d077 2324 goto free_kset;
2658e50d
JK		 2325
2326 err = register_filesystem(&f2fs_fs_type);
2327 if (err)
2328 goto free_shrinker;
787c7b8c
CY		 2329 err = f2fs_create_root_stats();
2330 if (err)
2331 goto free_filesystem;
5e176d54 2332 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
9890ff3f
ZH		 2333 return 0;
2334
787c7b8c
CY		 2335free_filesystem:
2336 unregister_filesystem(&f2fs_fs_type);
2658e50d
JK		 2337free_shrinker:
2338 unregister_shrinker(&f2fs_shrinker_info);
9890ff3f
ZH		 2339free_kset:
2340 kset_unregister(f2fs_kset);
1dcc336b
CY		 2341free_extent_cache:
2342 destroy_extent_cache();
9890ff3f
ZH		 2343free_checkpoint_caches:
2344 destroy_checkpoint_caches();
7fd9e544
JK		 2345free_segment_manager_caches:
2346 destroy_segment_manager_caches();
9890ff3f
ZH		 2347free_node_manager_caches:
2348 destroy_node_manager_caches();
2349free_inodecache:
2350 destroy_inodecache();
aff063e2
JK		 2351fail:
2352 return err;
2353}
2354
2355static void __exit exit_f2fs_fs(void)
2356{
5e176d54 2357 remove_proc_entry("fs/f2fs", NULL);
4589d25d 2358 f2fs_destroy_root_stats();
aff063e2 2359 unregister_filesystem(&f2fs_fs_type);
b8bef79d 2360 unregister_shrinker(&f2fs_shrinker_info);
b8bef79d 2361 kset_unregister(f2fs_kset);
fdf6c8be 2362 destroy_extent_cache();
aff063e2 2363 destroy_checkpoint_caches();
5dcd8a71 2364 destroy_segment_manager_caches();
aff063e2
JK		 2365 destroy_node_manager_caches();
2366 destroy_inodecache();
351f4fba 2367 f2fs_destroy_trace_ios();
aff063e2
JK		 2368}
2369
2370module_init(init_f2fs_fs)
2371module_exit(exit_f2fs_fs)
2372
2373MODULE_AUTHOR("Samsung Electronics's Praesto Team");
2374MODULE_DESCRIPTION("Flash Friendly File System");
2375MODULE_LICENSE("GPL");
b4b9d34c 2376
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