blob: d28c4528eff8599491c3726e3dd5f7e7937b4801 [file] [log] [blame]
Jaegeuk Kim0a8165d2012-11-29 13:28:09 +09001/*
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002 * 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>
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090015#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>
Jaegeuk Kim5e176d52013-06-28 12:47:01 +090021#include <linux/proc_fs.h>
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090022#include <linux/random.h>
23#include <linux/exportfs.h>
Namjae Jeond3ee4562013-03-17 17:26:14 +090024#include <linux/blkdev.h>
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090025#include <linux/f2fs_fs.h>
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090026#include <linux/sysfs.h>
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090027
28#include "f2fs.h"
29#include "node.h"
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +090030#include "segment.h"
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090031#include "xattr.h"
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090032#include "gc.h"
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090033
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090034#define CREATE_TRACE_POINTS
35#include <trace/events/f2fs.h>
36
Jaegeuk Kim5e176d52013-06-28 12:47:01 +090037static struct proc_dir_entry *f2fs_proc_root;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090038static struct kmem_cache *f2fs_inode_cachep;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090039static struct kset *f2fs_kset;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090040
41enum {
Namjae Jeon696c0182013-06-16 09:48:48 +090042 Opt_gc_background,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090043 Opt_disable_roll_forward,
44 Opt_discard,
45 Opt_noheap,
46 Opt_nouser_xattr,
47 Opt_noacl,
48 Opt_active_logs,
49 Opt_disable_ext_identify,
50 Opt_err,
51};
52
53static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090054 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090055 {Opt_disable_roll_forward, "disable_roll_forward"},
56 {Opt_discard, "discard"},
57 {Opt_noheap, "no_heap"},
58 {Opt_nouser_xattr, "nouser_xattr"},
59 {Opt_noacl, "noacl"},
60 {Opt_active_logs, "active_logs=%u"},
61 {Opt_disable_ext_identify, "disable_ext_identify"},
62 {Opt_err, NULL},
63};
64
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090065/* Sysfs support for f2fs */
66struct f2fs_attr {
67 struct attribute attr;
68 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
69 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
70 const char *, size_t);
71 int offset;
72};
73
74static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
75 struct f2fs_sb_info *sbi, char *buf)
76{
77 struct f2fs_gc_kthread *gc_kth = sbi->gc_thread;
78 unsigned int *ui;
79
80 if (!gc_kth)
81 return -EINVAL;
82
83 ui = (unsigned int *)(((char *)gc_kth) + a->offset);
84
85 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
86}
87
88static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
89 struct f2fs_sb_info *sbi,
90 const char *buf, size_t count)
91{
92 struct f2fs_gc_kthread *gc_kth = sbi->gc_thread;
93 unsigned long t;
94 unsigned int *ui;
95 ssize_t ret;
96
97 if (!gc_kth)
98 return -EINVAL;
99
100 ui = (unsigned int *)(((char *)gc_kth) + a->offset);
101
102 ret = kstrtoul(skip_spaces(buf), 0, &t);
103 if (ret < 0)
104 return ret;
105 *ui = t;
106 return count;
107}
108
109static ssize_t f2fs_attr_show(struct kobject *kobj,
110 struct attribute *attr, char *buf)
111{
112 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
113 s_kobj);
114 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
115
116 return a->show ? a->show(a, sbi, buf) : 0;
117}
118
119static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
120 const char *buf, size_t len)
121{
122 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
123 s_kobj);
124 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
125
126 return a->store ? a->store(a, sbi, buf, len) : 0;
127}
128
129static void f2fs_sb_release(struct kobject *kobj)
130{
131 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
132 s_kobj);
133 complete(&sbi->s_kobj_unregister);
134}
135
136#define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \
137static struct f2fs_attr f2fs_attr_##_name = { \
138 .attr = {.name = __stringify(_name), .mode = _mode }, \
139 .show = _show, \
140 .store = _store, \
141 .offset = offsetof(struct f2fs_gc_kthread, _elname), \
142}
143
144#define F2FS_RW_ATTR(name, elname) \
145 F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname)
146
147F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time);
148F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time);
149F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
Namjae Jeond2dc0952013-08-04 23:10:15 +0900150F2FS_RW_ATTR(gc_idle, gc_idle);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900151
152#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
153static struct attribute *f2fs_attrs[] = {
154 ATTR_LIST(gc_min_sleep_time),
155 ATTR_LIST(gc_max_sleep_time),
156 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900157 ATTR_LIST(gc_idle),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900158 NULL,
159};
160
161static const struct sysfs_ops f2fs_attr_ops = {
162 .show = f2fs_attr_show,
163 .store = f2fs_attr_store,
164};
165
166static struct kobj_type f2fs_ktype = {
167 .default_attrs = f2fs_attrs,
168 .sysfs_ops = &f2fs_attr_ops,
169 .release = f2fs_sb_release,
170};
171
Namjae Jeona07ef782012-12-30 14:52:05 +0900172void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
173{
174 struct va_format vaf;
175 va_list args;
176
177 va_start(args, fmt);
178 vaf.fmt = fmt;
179 vaf.va = &args;
180 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
181 va_end(args);
182}
183
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900184static void init_once(void *foo)
185{
186 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
187
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900188 inode_init_once(&fi->vfs_inode);
189}
190
Namjae Jeon696c0182013-06-16 09:48:48 +0900191static int parse_options(struct super_block *sb, char *options)
192{
193 struct f2fs_sb_info *sbi = F2FS_SB(sb);
194 substring_t args[MAX_OPT_ARGS];
195 char *p, *name;
196 int arg = 0;
197
198 if (!options)
199 return 0;
200
201 while ((p = strsep(&options, ",")) != NULL) {
202 int token;
203 if (!*p)
204 continue;
205 /*
206 * Initialize args struct so we know whether arg was
207 * found; some options take optional arguments.
208 */
209 args[0].to = args[0].from = NULL;
210 token = match_token(p, f2fs_tokens, args);
211
212 switch (token) {
213 case Opt_gc_background:
214 name = match_strdup(&args[0]);
215
216 if (!name)
217 return -ENOMEM;
218 if (!strncmp(name, "on", 2))
219 set_opt(sbi, BG_GC);
220 else if (!strncmp(name, "off", 3))
221 clear_opt(sbi, BG_GC);
222 else {
223 kfree(name);
224 return -EINVAL;
225 }
226 kfree(name);
227 break;
228 case Opt_disable_roll_forward:
229 set_opt(sbi, DISABLE_ROLL_FORWARD);
230 break;
231 case Opt_discard:
232 set_opt(sbi, DISCARD);
233 break;
234 case Opt_noheap:
235 set_opt(sbi, NOHEAP);
236 break;
237#ifdef CONFIG_F2FS_FS_XATTR
238 case Opt_nouser_xattr:
239 clear_opt(sbi, XATTR_USER);
240 break;
241#else
242 case Opt_nouser_xattr:
243 f2fs_msg(sb, KERN_INFO,
244 "nouser_xattr options not supported");
245 break;
246#endif
247#ifdef CONFIG_F2FS_FS_POSIX_ACL
248 case Opt_noacl:
249 clear_opt(sbi, POSIX_ACL);
250 break;
251#else
252 case Opt_noacl:
253 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
254 break;
255#endif
256 case Opt_active_logs:
257 if (args->from && match_int(args, &arg))
258 return -EINVAL;
259 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
260 return -EINVAL;
261 sbi->active_logs = arg;
262 break;
263 case Opt_disable_ext_identify:
264 set_opt(sbi, DISABLE_EXT_IDENTIFY);
265 break;
266 default:
267 f2fs_msg(sb, KERN_ERR,
268 "Unrecognized mount option \"%s\" or missing value",
269 p);
270 return -EINVAL;
271 }
272 }
273 return 0;
274}
275
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900276static struct inode *f2fs_alloc_inode(struct super_block *sb)
277{
278 struct f2fs_inode_info *fi;
279
280 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO);
281 if (!fi)
282 return NULL;
283
284 init_once((void *) fi);
285
Masanari Iida434720f2013-03-19 08:03:35 +0900286 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900287 fi->vfs_inode.i_version = 1;
288 atomic_set(&fi->dirty_dents, 0);
289 fi->i_current_depth = 1;
290 fi->i_advise = 0;
291 rwlock_init(&fi->ext.ext_lock);
292
293 set_inode_flag(fi, FI_NEW_INODE);
294
295 return &fi->vfs_inode;
296}
297
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900298static int f2fs_drop_inode(struct inode *inode)
299{
300 /*
301 * This is to avoid a deadlock condition like below.
302 * writeback_single_inode(inode)
303 * - f2fs_write_data_page
304 * - f2fs_gc -> iput -> evict
305 * - inode_wait_for_writeback(inode)
306 */
307 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
308 return 0;
309 return generic_drop_inode(inode);
310}
311
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900312/*
313 * f2fs_dirty_inode() is called from __mark_inode_dirty()
314 *
315 * We should call set_dirty_inode to write the dirty inode through write_inode.
316 */
317static void f2fs_dirty_inode(struct inode *inode, int flags)
318{
319 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900320}
321
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900322static void f2fs_i_callback(struct rcu_head *head)
323{
324 struct inode *inode = container_of(head, struct inode, i_rcu);
325 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
326}
327
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900328static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900329{
330 call_rcu(&inode->i_rcu, f2fs_i_callback);
331}
332
333static void f2fs_put_super(struct super_block *sb)
334{
335 struct f2fs_sb_info *sbi = F2FS_SB(sb);
336
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900337 if (sbi->s_proc) {
338 remove_proc_entry("segment_info", sbi->s_proc);
339 remove_proc_entry(sb->s_id, f2fs_proc_root);
340 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900341 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900342
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900343 f2fs_destroy_stats(sbi);
344 stop_gc_thread(sbi);
345
Jaegeuk Kim43727522013-02-04 15:11:17 +0900346 write_checkpoint(sbi, true);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900347
348 iput(sbi->node_inode);
349 iput(sbi->meta_inode);
350
351 /* destroy f2fs internal modules */
352 destroy_node_manager(sbi);
353 destroy_segment_manager(sbi);
354
355 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900356 kobject_put(&sbi->s_kobj);
357 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900358
359 sb->s_fs_info = NULL;
360 brelse(sbi->raw_super_buf);
361 kfree(sbi);
362}
363
364int f2fs_sync_fs(struct super_block *sb, int sync)
365{
366 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900367
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900368 trace_f2fs_sync_fs(sb, sync);
369
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900370 if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
371 return 0;
372
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900373 if (sync) {
374 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim43727522013-02-04 15:11:17 +0900375 write_checkpoint(sbi, false);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900376 mutex_unlock(&sbi->gc_mutex);
377 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900378 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900379 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900380
Namjae Jeon64c576f2012-12-22 12:10:27 +0900381 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900382}
383
Changman Leed6212a52013-01-29 18:30:07 +0900384static int f2fs_freeze(struct super_block *sb)
385{
386 int err;
387
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900388 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900389 return 0;
390
391 err = f2fs_sync_fs(sb, 1);
392 return err;
393}
394
395static int f2fs_unfreeze(struct super_block *sb)
396{
397 return 0;
398}
399
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900400static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
401{
402 struct super_block *sb = dentry->d_sb;
403 struct f2fs_sb_info *sbi = F2FS_SB(sb);
404 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
405 block_t total_count, user_block_count, start_count, ovp_count;
406
407 total_count = le64_to_cpu(sbi->raw_super->block_count);
408 user_block_count = sbi->user_block_count;
409 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
410 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
411 buf->f_type = F2FS_SUPER_MAGIC;
412 buf->f_bsize = sbi->blocksize;
413
414 buf->f_blocks = total_count - start_count;
415 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
416 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
417
Jaegeuk Kim1362b5e2012-12-12 19:45:49 +0900418 buf->f_files = sbi->total_node_count;
419 buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900420
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900421 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900422 buf->f_fsid.val[0] = (u32)id;
423 buf->f_fsid.val[1] = (u32)(id >> 32);
424
425 return 0;
426}
427
428static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
429{
430 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
431
Namjae Jeon696c0182013-06-16 09:48:48 +0900432 if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC))
433 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900434 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900435 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900436 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
437 seq_puts(seq, ",disable_roll_forward");
438 if (test_opt(sbi, DISCARD))
439 seq_puts(seq, ",discard");
440 if (test_opt(sbi, NOHEAP))
441 seq_puts(seq, ",no_heap_alloc");
442#ifdef CONFIG_F2FS_FS_XATTR
443 if (test_opt(sbi, XATTR_USER))
444 seq_puts(seq, ",user_xattr");
445 else
446 seq_puts(seq, ",nouser_xattr");
447#endif
448#ifdef CONFIG_F2FS_FS_POSIX_ACL
449 if (test_opt(sbi, POSIX_ACL))
450 seq_puts(seq, ",acl");
451 else
452 seq_puts(seq, ",noacl");
453#endif
454 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100455 seq_puts(seq, ",disable_ext_identify");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900456
457 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
458
459 return 0;
460}
461
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900462static int segment_info_seq_show(struct seq_file *seq, void *offset)
463{
464 struct super_block *sb = seq->private;
465 struct f2fs_sb_info *sbi = F2FS_SB(sb);
466 unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main);
467 int i;
468
469 for (i = 0; i < total_segs; i++) {
470 seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1));
471 if (i != 0 && (i % 10) == 0)
472 seq_puts(seq, "\n");
473 else
474 seq_puts(seq, " ");
475 }
476 return 0;
477}
478
479static int segment_info_open_fs(struct inode *inode, struct file *file)
480{
481 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
482}
483
484static const struct file_operations f2fs_seq_segment_info_fops = {
485 .owner = THIS_MODULE,
486 .open = segment_info_open_fs,
487 .read = seq_read,
488 .llseek = seq_lseek,
489 .release = single_release,
490};
491
Namjae Jeon696c0182013-06-16 09:48:48 +0900492static int f2fs_remount(struct super_block *sb, int *flags, char *data)
493{
494 struct f2fs_sb_info *sbi = F2FS_SB(sb);
495 struct f2fs_mount_info org_mount_opt;
496 int err, active_logs;
497
498 /*
499 * Save the old mount options in case we
500 * need to restore them.
501 */
502 org_mount_opt = sbi->mount_opt;
503 active_logs = sbi->active_logs;
504
505 /* parse mount options */
506 err = parse_options(sb, data);
507 if (err)
508 goto restore_opts;
509
510 /*
511 * Previous and new state of filesystem is RO,
512 * so no point in checking GC conditions.
513 */
514 if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
515 goto skip;
516
517 /*
518 * We stop the GC thread if FS is mounted as RO
519 * or if background_gc = off is passed in mount
520 * option. Also sync the filesystem.
521 */
522 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
523 if (sbi->gc_thread) {
524 stop_gc_thread(sbi);
525 f2fs_sync_fs(sb, 1);
526 }
527 } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) {
528 err = start_gc_thread(sbi);
529 if (err)
530 goto restore_opts;
531 }
532skip:
533 /* Update the POSIXACL Flag */
534 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
535 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
536 return 0;
537
538restore_opts:
539 sbi->mount_opt = org_mount_opt;
540 sbi->active_logs = active_logs;
541 return err;
542}
543
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900544static struct super_operations f2fs_sops = {
545 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900546 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900547 .destroy_inode = f2fs_destroy_inode,
548 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900549 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900550 .show_options = f2fs_show_options,
551 .evict_inode = f2fs_evict_inode,
552 .put_super = f2fs_put_super,
553 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900554 .freeze_fs = f2fs_freeze,
555 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900556 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900557 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900558};
559
560static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
561 u64 ino, u32 generation)
562{
563 struct f2fs_sb_info *sbi = F2FS_SB(sb);
564 struct inode *inode;
565
566 if (ino < F2FS_ROOT_INO(sbi))
567 return ERR_PTR(-ESTALE);
568
569 /*
570 * f2fs_iget isn't quite right if the inode is currently unallocated!
571 * However f2fs_iget currently does appropriate checks to handle stale
572 * inodes so everything is OK.
573 */
574 inode = f2fs_iget(sb, ino);
575 if (IS_ERR(inode))
576 return ERR_CAST(inode);
577 if (generation && inode->i_generation != generation) {
578 /* we didn't find the right inode.. */
579 iput(inode);
580 return ERR_PTR(-ESTALE);
581 }
582 return inode;
583}
584
585static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
586 int fh_len, int fh_type)
587{
588 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
589 f2fs_nfs_get_inode);
590}
591
592static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
593 int fh_len, int fh_type)
594{
595 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
596 f2fs_nfs_get_inode);
597}
598
599static const struct export_operations f2fs_export_ops = {
600 .fh_to_dentry = f2fs_fh_to_dentry,
601 .fh_to_parent = f2fs_fh_to_parent,
602 .get_parent = f2fs_get_parent,
603};
604
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900605static loff_t max_file_size(unsigned bits)
606{
607 loff_t result = ADDRS_PER_INODE;
608 loff_t leaf_count = ADDRS_PER_BLOCK;
609
610 /* two direct node blocks */
611 result += (leaf_count * 2);
612
613 /* two indirect node blocks */
614 leaf_count *= NIDS_PER_BLOCK;
615 result += (leaf_count * 2);
616
617 /* one double indirect node block */
618 leaf_count *= NIDS_PER_BLOCK;
619 result += leaf_count;
620
621 result <<= bits;
622 return result;
623}
624
Namjae Jeona07ef782012-12-30 14:52:05 +0900625static int sanity_check_raw_super(struct super_block *sb,
626 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900627{
628 unsigned int blocksize;
629
Namjae Jeona07ef782012-12-30 14:52:05 +0900630 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
631 f2fs_msg(sb, KERN_INFO,
632 "Magic Mismatch, valid(0x%x) - read(0x%x)",
633 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900634 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900635 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900636
majianpeng5c9b4692013-02-01 19:07:57 +0800637 /* Currently, support only 4KB page cache size */
638 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
639 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800640 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800641 PAGE_CACHE_SIZE);
642 return 1;
643 }
644
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900645 /* Currently, support only 4KB block size */
646 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800647 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900648 f2fs_msg(sb, KERN_INFO,
649 "Invalid blocksize (%u), supports only 4KB\n",
650 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900651 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900652 }
majianpeng5c9b4692013-02-01 19:07:57 +0800653
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900654 if (le32_to_cpu(raw_super->log_sectorsize) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900655 F2FS_LOG_SECTOR_SIZE) {
656 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900657 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900658 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900659 if (le32_to_cpu(raw_super->log_sectors_per_block) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900660 F2FS_LOG_SECTORS_PER_BLOCK) {
661 f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900662 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900663 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900664 return 0;
665}
666
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900667static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900668{
669 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900670 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
671 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900672
673 total = le32_to_cpu(raw_super->segment_count);
674 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
675 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
676 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
677 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
678 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
679
680 if (fsmeta >= total)
681 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900682
683 if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) {
684 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
685 return 1;
686 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900687 return 0;
688}
689
690static void init_sb_info(struct f2fs_sb_info *sbi)
691{
692 struct f2fs_super_block *raw_super = sbi->raw_super;
693 int i;
694
695 sbi->log_sectors_per_block =
696 le32_to_cpu(raw_super->log_sectors_per_block);
697 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
698 sbi->blocksize = 1 << sbi->log_blocksize;
699 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
700 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
701 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
702 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
703 sbi->total_sections = le32_to_cpu(raw_super->section_count);
704 sbi->total_node_count =
705 (le32_to_cpu(raw_super->segment_count_nat) / 2)
706 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
707 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
708 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
709 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900710 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900711
712 for (i = 0; i < NR_COUNT_TYPE; i++)
713 atomic_set(&sbi->nr_pages[i], 0);
714}
715
majianpeng14d7e9d2013-02-01 19:07:03 +0800716static int validate_superblock(struct super_block *sb,
717 struct f2fs_super_block **raw_super,
718 struct buffer_head **raw_super_buf, sector_t block)
719{
720 const char *super = (block == 0 ? "first" : "second");
721
722 /* read f2fs raw super block */
723 *raw_super_buf = sb_bread(sb, block);
724 if (!*raw_super_buf) {
725 f2fs_msg(sb, KERN_ERR, "unable to read %s superblock",
726 super);
Namjae Jeonc0d39e62013-03-17 17:26:53 +0900727 return -EIO;
majianpeng14d7e9d2013-02-01 19:07:03 +0800728 }
729
730 *raw_super = (struct f2fs_super_block *)
731 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
732
733 /* sanity checking of raw super */
734 if (!sanity_check_raw_super(sb, *raw_super))
735 return 0;
736
737 f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem "
738 "in %s superblock", super);
Namjae Jeonc0d39e62013-03-17 17:26:53 +0900739 return -EINVAL;
majianpeng14d7e9d2013-02-01 19:07:03 +0800740}
741
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900742static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
743{
744 struct f2fs_sb_info *sbi;
745 struct f2fs_super_block *raw_super;
746 struct buffer_head *raw_super_buf;
747 struct inode *root;
748 long err = -EINVAL;
749 int i;
750
751 /* allocate memory for f2fs-specific super block info */
752 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
753 if (!sbi)
754 return -ENOMEM;
755
Namjae Jeonff9234a2013-01-12 14:41:13 +0900756 /* set a block size */
Namjae Jeona07ef782012-12-30 14:52:05 +0900757 if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) {
758 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900759 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +0900760 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900761
Namjae Jeonc0d39e62013-03-17 17:26:53 +0900762 err = validate_superblock(sb, &raw_super, &raw_super_buf, 0);
763 if (err) {
majianpeng14d7e9d2013-02-01 19:07:03 +0800764 brelse(raw_super_buf);
Namjae Jeonc0d39e62013-03-17 17:26:53 +0900765 /* check secondary superblock when primary failed */
766 err = validate_superblock(sb, &raw_super, &raw_super_buf, 1);
767 if (err)
majianpeng14d7e9d2013-02-01 19:07:03 +0800768 goto free_sb_buf;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900769 }
Gu Zheng5fb08372013-06-07 14:16:53 +0800770 sb->s_fs_info = sbi;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900771 /* init some FS parameters */
772 sbi->active_logs = NR_CURSEG_TYPE;
773
774 set_opt(sbi, BG_GC);
775
776#ifdef CONFIG_F2FS_FS_XATTR
777 set_opt(sbi, XATTR_USER);
778#endif
779#ifdef CONFIG_F2FS_FS_POSIX_ACL
780 set_opt(sbi, POSIX_ACL);
781#endif
782 /* parse mount options */
Gu Zheng5fb08372013-06-07 14:16:53 +0800783 err = parse_options(sb, (char *)data);
Wei Yongjun66348b72013-04-12 10:23:18 +0800784 if (err)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900785 goto free_sb_buf;
786
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900787 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900788 sb->s_max_links = F2FS_LINK_MAX;
789 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
790
791 sb->s_op = &f2fs_sops;
792 sb->s_xattr = f2fs_xattr_handlers;
793 sb->s_export_op = &f2fs_export_ops;
794 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900795 sb->s_time_gran = 1;
796 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
797 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
798 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
799
800 /* init f2fs-specific super block info */
801 sbi->sb = sb;
802 sbi->raw_super = raw_super;
803 sbi->raw_super_buf = raw_super_buf;
804 mutex_init(&sbi->gc_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900805 mutex_init(&sbi->writepages);
806 mutex_init(&sbi->cp_mutex);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900807 for (i = 0; i < NR_GLOBAL_LOCKS; i++)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900808 mutex_init(&sbi->fs_lock[i]);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900809 mutex_init(&sbi->node_write);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900810 sbi->por_doing = 0;
811 spin_lock_init(&sbi->stat_lock);
812 init_rwsem(&sbi->bio_sem);
813 init_sb_info(sbi);
814
815 /* get an inode for meta space */
816 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
817 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900818 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900819 err = PTR_ERR(sbi->meta_inode);
820 goto free_sb_buf;
821 }
822
823 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900824 if (err) {
825 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900826 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +0900827 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900828
829 /* sanity checking of checkpoint */
830 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900831 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900832 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900833 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +0900834 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900835
836 sbi->total_valid_node_count =
837 le32_to_cpu(sbi->ckpt->valid_node_count);
838 sbi->total_valid_inode_count =
839 le32_to_cpu(sbi->ckpt->valid_inode_count);
840 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
841 sbi->total_valid_block_count =
842 le64_to_cpu(sbi->ckpt->valid_block_count);
843 sbi->last_valid_block_count = sbi->total_valid_block_count;
844 sbi->alloc_valid_block_count = 0;
845 INIT_LIST_HEAD(&sbi->dir_inode_list);
846 spin_lock_init(&sbi->dir_inode_lock);
847
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900848 init_orphan_info(sbi);
849
850 /* setup f2fs internal modules */
851 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900852 if (err) {
853 f2fs_msg(sb, KERN_ERR,
854 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900855 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +0900856 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900857 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900858 if (err) {
859 f2fs_msg(sb, KERN_ERR,
860 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900861 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +0900862 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900863
864 build_gc_manager(sbi);
865
866 /* get an inode for node space */
867 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
868 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900869 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900870 err = PTR_ERR(sbi->node_inode);
871 goto free_nm;
872 }
873
874 /* if there are nt orphan nodes free them */
875 err = -EINVAL;
Jaegeuk Kim30f0c752012-12-19 16:09:19 +0900876 if (recover_orphan_inodes(sbi))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900877 goto free_node_inode;
878
879 /* read root inode and dentry */
880 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
881 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900882 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900883 err = PTR_ERR(root);
884 goto free_node_inode;
885 }
886 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size)
887 goto free_root_inode;
888
889 sb->s_root = d_make_root(root); /* allocate root dentry */
890 if (!sb->s_root) {
891 err = -ENOMEM;
892 goto free_root_inode;
893 }
894
895 /* recover fsynced data */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +0900896 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
897 err = recover_fsync_data(sbi);
Chris Friesbde582b2013-05-02 16:07:34 -0500898 if (err)
899 f2fs_msg(sb, KERN_ERR,
900 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kim6ead1142013-03-20 19:01:06 +0900901 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900902
Namjae Jeon696c0182013-06-16 09:48:48 +0900903 /*
904 * If filesystem is not mounted as read-only then
905 * do start the gc_thread.
906 */
907 if (!(sb->s_flags & MS_RDONLY)) {
908 /* After POR, we can run background GC thread.*/
909 err = start_gc_thread(sbi);
910 if (err)
911 goto fail;
912 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900913
914 err = f2fs_build_stats(sbi);
915 if (err)
916 goto fail;
917
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900918 if (f2fs_proc_root)
919 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
920
921 if (sbi->s_proc)
922 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
923 &f2fs_seq_segment_info_fops, sb);
924
Namjae Jeond3ee4562013-03-17 17:26:14 +0900925 if (test_opt(sbi, DISCARD)) {
926 struct request_queue *q = bdev_get_queue(sb->s_bdev);
927 if (!blk_queue_discard(q))
928 f2fs_msg(sb, KERN_WARNING,
929 "mounting with \"discard\" option, but "
930 "the device does not support discard");
931 }
932
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900933 sbi->s_kobj.kset = f2fs_kset;
934 init_completion(&sbi->s_kobj_unregister);
935 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
936 "%s", sb->s_id);
937 if (err)
938 goto fail;
939
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900940 return 0;
941fail:
942 stop_gc_thread(sbi);
943free_root_inode:
944 dput(sb->s_root);
945 sb->s_root = NULL;
946free_node_inode:
947 iput(sbi->node_inode);
948free_nm:
949 destroy_node_manager(sbi);
950free_sm:
951 destroy_segment_manager(sbi);
952free_cp:
953 kfree(sbi->ckpt);
954free_meta_inode:
955 make_bad_inode(sbi->meta_inode);
956 iput(sbi->meta_inode);
957free_sb_buf:
958 brelse(raw_super_buf);
959free_sbi:
960 kfree(sbi);
961 return err;
962}
963
964static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
965 const char *dev_name, void *data)
966{
967 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
968}
969
970static struct file_system_type f2fs_fs_type = {
971 .owner = THIS_MODULE,
972 .name = "f2fs",
973 .mount = f2fs_mount,
974 .kill_sb = kill_block_super,
975 .fs_flags = FS_REQUIRES_DEV,
976};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800977MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900978
Namjae Jeon6e6093a2013-01-17 00:08:30 +0900979static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900980{
981 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
982 sizeof(struct f2fs_inode_info), NULL);
983 if (f2fs_inode_cachep == NULL)
984 return -ENOMEM;
985 return 0;
986}
987
988static void destroy_inodecache(void)
989{
990 /*
991 * Make sure all delayed rcu free inodes are flushed before we
992 * destroy cache.
993 */
994 rcu_barrier();
995 kmem_cache_destroy(f2fs_inode_cachep);
996}
997
998static int __init init_f2fs_fs(void)
999{
1000 int err;
1001
1002 err = init_inodecache();
1003 if (err)
1004 goto fail;
1005 err = create_node_manager_caches();
1006 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001007 goto free_inodecache;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001008 err = create_gc_caches();
1009 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001010 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001011 err = create_checkpoint_caches();
1012 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001013 goto free_gc_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001014 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001015 if (!f2fs_kset) {
1016 err = -ENOMEM;
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001017 goto free_checkpoint_caches;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001018 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001019 err = register_filesystem(&f2fs_fs_type);
1020 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001021 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001022 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001023 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001024 return 0;
1025
1026free_kset:
1027 kset_unregister(f2fs_kset);
1028free_checkpoint_caches:
1029 destroy_checkpoint_caches();
1030free_gc_caches:
1031 destroy_gc_caches();
1032free_node_manager_caches:
1033 destroy_node_manager_caches();
1034free_inodecache:
1035 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001036fail:
1037 return err;
1038}
1039
1040static void __exit exit_f2fs_fs(void)
1041{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001042 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001043 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001044 unregister_filesystem(&f2fs_fs_type);
1045 destroy_checkpoint_caches();
1046 destroy_gc_caches();
1047 destroy_node_manager_caches();
1048 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001049 kset_unregister(f2fs_kset);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001050}
1051
1052module_init(init_f2fs_fs)
1053module_exit(exit_f2fs_fs)
1054
1055MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1056MODULE_DESCRIPTION("Flash Friendly File System");
1057MODULE_LICENSE("GPL");