blob: c3aa72f9c8c849358172bf68e7d34cb19f7dfffd [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 Kimdb9f7c12014-12-17 20:04:08 -080033#include "trace.h"
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090034
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090035#define CREATE_TRACE_POINTS
36#include <trace/events/f2fs.h>
37
Jaegeuk Kim5e176d52013-06-28 12:47:01 +090038static struct proc_dir_entry *f2fs_proc_root;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090039static struct kmem_cache *f2fs_inode_cachep;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090040static struct kset *f2fs_kset;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090041
42enum {
Namjae Jeon696c0182013-06-16 09:48:48 +090043 Opt_gc_background,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090044 Opt_disable_roll_forward,
45 Opt_discard,
46 Opt_noheap,
Kelly Anderson4058c512013-10-07 11:36:20 +090047 Opt_user_xattr,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090048 Opt_nouser_xattr,
Kelly Anderson4058c512013-10-07 11:36:20 +090049 Opt_acl,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090050 Opt_noacl,
51 Opt_active_logs,
52 Opt_disable_ext_identify,
Jaegeuk Kim444c5802013-08-08 15:16:22 +090053 Opt_inline_xattr,
Huajun Li8274de72013-11-10 23:13:17 +080054 Opt_inline_data,
Chao Yu5efd3c62014-09-24 18:16:13 +080055 Opt_inline_dentry,
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090056 Opt_flush_merge,
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070057 Opt_nobarrier,
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070058 Opt_fastboot,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090059 Opt_err,
60};
61
62static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090063 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090064 {Opt_disable_roll_forward, "disable_roll_forward"},
65 {Opt_discard, "discard"},
66 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +090067 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090068 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +090069 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090070 {Opt_noacl, "noacl"},
71 {Opt_active_logs, "active_logs=%u"},
72 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +090073 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +080074 {Opt_inline_data, "inline_data"},
Chao Yu5efd3c62014-09-24 18:16:13 +080075 {Opt_inline_dentry, "inline_dentry"},
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090076 {Opt_flush_merge, "flush_merge"},
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070077 {Opt_nobarrier, "nobarrier"},
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070078 {Opt_fastboot, "fastboot"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090079 {Opt_err, NULL},
80};
81
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090082/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090083enum {
84 GC_THREAD, /* struct f2fs_gc_thread */
85 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090086 NM_INFO, /* struct f2fs_nm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +090087 F2FS_SBI, /* struct f2fs_sb_info */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090088};
89
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090090struct f2fs_attr {
91 struct attribute attr;
92 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
93 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
94 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090095 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090096 int offset;
97};
98
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090099static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
100{
101 if (struct_type == GC_THREAD)
102 return (unsigned char *)sbi->gc_thread;
103 else if (struct_type == SM_INFO)
104 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900105 else if (struct_type == NM_INFO)
106 return (unsigned char *)NM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900107 else if (struct_type == F2FS_SBI)
108 return (unsigned char *)sbi;
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900109 return NULL;
110}
111
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900112static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
113 struct f2fs_sb_info *sbi, char *buf)
114{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900115 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900116 unsigned int *ui;
117
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900118 ptr = __struct_ptr(sbi, a->struct_type);
119 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900120 return -EINVAL;
121
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900122 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900123
124 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
125}
126
127static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
128 struct f2fs_sb_info *sbi,
129 const char *buf, size_t count)
130{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900131 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900132 unsigned long t;
133 unsigned int *ui;
134 ssize_t ret;
135
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900136 ptr = __struct_ptr(sbi, a->struct_type);
137 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900138 return -EINVAL;
139
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900140 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900141
142 ret = kstrtoul(skip_spaces(buf), 0, &t);
143 if (ret < 0)
144 return ret;
145 *ui = t;
146 return count;
147}
148
149static ssize_t f2fs_attr_show(struct kobject *kobj,
150 struct attribute *attr, char *buf)
151{
152 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
153 s_kobj);
154 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
155
156 return a->show ? a->show(a, sbi, buf) : 0;
157}
158
159static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
160 const char *buf, size_t len)
161{
162 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
163 s_kobj);
164 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
165
166 return a->store ? a->store(a, sbi, buf, len) : 0;
167}
168
169static void f2fs_sb_release(struct kobject *kobj)
170{
171 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
172 s_kobj);
173 complete(&sbi->s_kobj_unregister);
174}
175
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900176#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900177static struct f2fs_attr f2fs_attr_##_name = { \
178 .attr = {.name = __stringify(_name), .mode = _mode }, \
179 .show = _show, \
180 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900181 .struct_type = _struct_type, \
182 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900183}
184
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900185#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
186 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
187 f2fs_sbi_show, f2fs_sbi_store, \
188 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900189
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900190F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
191F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
192F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
193F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
194F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900195F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900196F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
197F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700198F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900199F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900200F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900201F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900202
203#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
204static struct attribute *f2fs_attrs[] = {
205 ATTR_LIST(gc_min_sleep_time),
206 ATTR_LIST(gc_max_sleep_time),
207 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900208 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900209 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900210 ATTR_LIST(max_small_discards),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900211 ATTR_LIST(ipu_policy),
212 ATTR_LIST(min_ipu_util),
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700213 ATTR_LIST(min_fsync_blocks),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900214 ATTR_LIST(max_victim_search),
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900215 ATTR_LIST(dir_level),
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900216 ATTR_LIST(ram_thresh),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900217 NULL,
218};
219
220static const struct sysfs_ops f2fs_attr_ops = {
221 .show = f2fs_attr_show,
222 .store = f2fs_attr_store,
223};
224
225static struct kobj_type f2fs_ktype = {
226 .default_attrs = f2fs_attrs,
227 .sysfs_ops = &f2fs_attr_ops,
228 .release = f2fs_sb_release,
229};
230
Namjae Jeona07ef782012-12-30 14:52:05 +0900231void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
232{
233 struct va_format vaf;
234 va_list args;
235
236 va_start(args, fmt);
237 vaf.fmt = fmt;
238 vaf.va = &args;
239 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
240 va_end(args);
241}
242
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900243static void init_once(void *foo)
244{
245 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
246
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900247 inode_init_once(&fi->vfs_inode);
248}
249
Namjae Jeon696c0182013-06-16 09:48:48 +0900250static int parse_options(struct super_block *sb, char *options)
251{
252 struct f2fs_sb_info *sbi = F2FS_SB(sb);
253 substring_t args[MAX_OPT_ARGS];
254 char *p, *name;
255 int arg = 0;
256
257 if (!options)
258 return 0;
259
260 while ((p = strsep(&options, ",")) != NULL) {
261 int token;
262 if (!*p)
263 continue;
264 /*
265 * Initialize args struct so we know whether arg was
266 * found; some options take optional arguments.
267 */
268 args[0].to = args[0].from = NULL;
269 token = match_token(p, f2fs_tokens, args);
270
271 switch (token) {
272 case Opt_gc_background:
273 name = match_strdup(&args[0]);
274
275 if (!name)
276 return -ENOMEM;
Chao Yu04c09382014-03-18 09:07:59 +0800277 if (strlen(name) == 2 && !strncmp(name, "on", 2))
Namjae Jeon696c0182013-06-16 09:48:48 +0900278 set_opt(sbi, BG_GC);
Chao Yu04c09382014-03-18 09:07:59 +0800279 else if (strlen(name) == 3 && !strncmp(name, "off", 3))
Namjae Jeon696c0182013-06-16 09:48:48 +0900280 clear_opt(sbi, BG_GC);
281 else {
282 kfree(name);
283 return -EINVAL;
284 }
285 kfree(name);
286 break;
287 case Opt_disable_roll_forward:
288 set_opt(sbi, DISABLE_ROLL_FORWARD);
289 break;
290 case Opt_discard:
291 set_opt(sbi, DISCARD);
292 break;
293 case Opt_noheap:
294 set_opt(sbi, NOHEAP);
295 break;
296#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900297 case Opt_user_xattr:
298 set_opt(sbi, XATTR_USER);
299 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900300 case Opt_nouser_xattr:
301 clear_opt(sbi, XATTR_USER);
302 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900303 case Opt_inline_xattr:
304 set_opt(sbi, INLINE_XATTR);
305 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900306#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900307 case Opt_user_xattr:
308 f2fs_msg(sb, KERN_INFO,
309 "user_xattr options not supported");
310 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900311 case Opt_nouser_xattr:
312 f2fs_msg(sb, KERN_INFO,
313 "nouser_xattr options not supported");
314 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900315 case Opt_inline_xattr:
316 f2fs_msg(sb, KERN_INFO,
317 "inline_xattr options not supported");
318 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900319#endif
320#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900321 case Opt_acl:
322 set_opt(sbi, POSIX_ACL);
323 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900324 case Opt_noacl:
325 clear_opt(sbi, POSIX_ACL);
326 break;
327#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900328 case Opt_acl:
329 f2fs_msg(sb, KERN_INFO, "acl options not supported");
330 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900331 case Opt_noacl:
332 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
333 break;
334#endif
335 case Opt_active_logs:
336 if (args->from && match_int(args, &arg))
337 return -EINVAL;
338 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
339 return -EINVAL;
340 sbi->active_logs = arg;
341 break;
342 case Opt_disable_ext_identify:
343 set_opt(sbi, DISABLE_EXT_IDENTIFY);
344 break;
Huajun Li8274de72013-11-10 23:13:17 +0800345 case Opt_inline_data:
346 set_opt(sbi, INLINE_DATA);
347 break;
Chao Yu5efd3c62014-09-24 18:16:13 +0800348 case Opt_inline_dentry:
349 set_opt(sbi, INLINE_DENTRY);
350 break;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900351 case Opt_flush_merge:
352 set_opt(sbi, FLUSH_MERGE);
353 break;
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700354 case Opt_nobarrier:
355 set_opt(sbi, NOBARRIER);
356 break;
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700357 case Opt_fastboot:
358 set_opt(sbi, FASTBOOT);
359 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900360 default:
361 f2fs_msg(sb, KERN_ERR,
362 "Unrecognized mount option \"%s\" or missing value",
363 p);
364 return -EINVAL;
365 }
366 }
367 return 0;
368}
369
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900370static struct inode *f2fs_alloc_inode(struct super_block *sb)
371{
372 struct f2fs_inode_info *fi;
373
Chao Yua0acdfe2013-12-05 09:54:00 +0800374 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900375 if (!fi)
376 return NULL;
377
378 init_once((void *) fi);
379
Masanari Iida434720f2013-03-19 08:03:35 +0900380 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900381 fi->vfs_inode.i_version = 1;
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700382 atomic_set(&fi->dirty_pages, 0);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900383 fi->i_current_depth = 1;
384 fi->i_advise = 0;
385 rwlock_init(&fi->ext.ext_lock);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900386 init_rwsem(&fi->i_sem);
Jaegeuk Kim34ba94b2014-10-09 13:19:53 -0700387 INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700388 INIT_LIST_HEAD(&fi->inmem_pages);
389 mutex_init(&fi->inmem_lock);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900390
391 set_inode_flag(fi, FI_NEW_INODE);
392
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900393 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
394 set_inode_flag(fi, FI_INLINE_XATTR);
395
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900396 /* Will be used by directory only */
397 fi->i_dir_level = F2FS_SB(sb)->dir_level;
398
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900399 return &fi->vfs_inode;
400}
401
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900402static int f2fs_drop_inode(struct inode *inode)
403{
404 /*
405 * This is to avoid a deadlock condition like below.
406 * writeback_single_inode(inode)
407 * - f2fs_write_data_page
408 * - f2fs_gc -> iput -> evict
409 * - inode_wait_for_writeback(inode)
410 */
411 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
412 return 0;
413 return generic_drop_inode(inode);
414}
415
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900416/*
417 * f2fs_dirty_inode() is called from __mark_inode_dirty()
418 *
419 * We should call set_dirty_inode to write the dirty inode through write_inode.
420 */
421static void f2fs_dirty_inode(struct inode *inode, int flags)
422{
423 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900424}
425
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900426static void f2fs_i_callback(struct rcu_head *head)
427{
428 struct inode *inode = container_of(head, struct inode, i_rcu);
429 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
430}
431
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900432static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900433{
434 call_rcu(&inode->i_rcu, f2fs_i_callback);
435}
436
437static void f2fs_put_super(struct super_block *sb)
438{
439 struct f2fs_sb_info *sbi = F2FS_SB(sb);
440
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900441 if (sbi->s_proc) {
442 remove_proc_entry("segment_info", sbi->s_proc);
443 remove_proc_entry(sb->s_id, f2fs_proc_root);
444 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900445 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900446
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900447 f2fs_destroy_stats(sbi);
448 stop_gc_thread(sbi);
449
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800450 /*
451 * We don't need to do checkpoint when superblock is clean.
452 * But, the previous checkpoint was not done by umount, it needs to do
453 * clean checkpoint again.
454 */
Chao Yucaf00472015-01-28 17:48:42 +0800455 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800456 !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) {
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700457 struct cp_control cpc = {
458 .reason = CP_UMOUNT,
459 };
460 write_checkpoint(sbi, &cpc);
461 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900462
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700463 /*
464 * normally superblock is clean, so we need to release this.
465 * In addition, EIO will skip do checkpoint, we need this as well.
466 */
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700467 release_dirty_inode(sbi);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700468 release_discard_addrs(sbi);
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700469
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900470 iput(sbi->node_inode);
471 iput(sbi->meta_inode);
472
473 /* destroy f2fs internal modules */
474 destroy_node_manager(sbi);
475 destroy_segment_manager(sbi);
476
477 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900478 kobject_put(&sbi->s_kobj);
479 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900480
481 sb->s_fs_info = NULL;
482 brelse(sbi->raw_super_buf);
483 kfree(sbi);
484}
485
486int f2fs_sync_fs(struct super_block *sb, int sync)
487{
488 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900489
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900490 trace_f2fs_sync_fs(sb, sync);
491
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900492 if (sync) {
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700493 struct cp_control cpc;
494
Chao Yucaf00472015-01-28 17:48:42 +0800495 cpc.reason = (test_opt(sbi, FASTBOOT) ||
496 is_sbi_flag_set(sbi, SBI_IS_CLOSE)) ?
497 CP_UMOUNT : CP_SYNC;
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900498 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700499 write_checkpoint(sbi, &cpc);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900500 mutex_unlock(&sbi->gc_mutex);
501 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900502 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900503 }
Jaegeuk Kimdb9f7c12014-12-17 20:04:08 -0800504 f2fs_trace_ios(NULL, NULL, 1);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900505
Namjae Jeon64c576f2012-12-22 12:10:27 +0900506 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900507}
508
Changman Leed6212a52013-01-29 18:30:07 +0900509static int f2fs_freeze(struct super_block *sb)
510{
511 int err;
512
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900513 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900514 return 0;
515
516 err = f2fs_sync_fs(sb, 1);
517 return err;
518}
519
520static int f2fs_unfreeze(struct super_block *sb)
521{
522 return 0;
523}
524
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900525static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
526{
527 struct super_block *sb = dentry->d_sb;
528 struct f2fs_sb_info *sbi = F2FS_SB(sb);
529 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
530 block_t total_count, user_block_count, start_count, ovp_count;
531
532 total_count = le64_to_cpu(sbi->raw_super->block_count);
533 user_block_count = sbi->user_block_count;
534 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
535 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
536 buf->f_type = F2FS_SUPER_MAGIC;
537 buf->f_bsize = sbi->blocksize;
538
539 buf->f_blocks = total_count - start_count;
540 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
541 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
542
Chao Yuc200b1a2014-08-20 18:36:46 +0800543 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
544 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900545
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900546 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900547 buf->f_fsid.val[0] = (u32)id;
548 buf->f_fsid.val[1] = (u32)(id >> 32);
549
550 return 0;
551}
552
553static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
554{
555 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
556
Gu Zhengb270ad62014-04-11 17:49:55 +0800557 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
Namjae Jeon696c0182013-06-16 09:48:48 +0900558 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900559 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900560 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900561 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
562 seq_puts(seq, ",disable_roll_forward");
563 if (test_opt(sbi, DISCARD))
564 seq_puts(seq, ",discard");
565 if (test_opt(sbi, NOHEAP))
566 seq_puts(seq, ",no_heap_alloc");
567#ifdef CONFIG_F2FS_FS_XATTR
568 if (test_opt(sbi, XATTR_USER))
569 seq_puts(seq, ",user_xattr");
570 else
571 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900572 if (test_opt(sbi, INLINE_XATTR))
573 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900574#endif
575#ifdef CONFIG_F2FS_FS_POSIX_ACL
576 if (test_opt(sbi, POSIX_ACL))
577 seq_puts(seq, ",acl");
578 else
579 seq_puts(seq, ",noacl");
580#endif
581 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100582 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800583 if (test_opt(sbi, INLINE_DATA))
584 seq_puts(seq, ",inline_data");
Chao Yu5efd3c62014-09-24 18:16:13 +0800585 if (test_opt(sbi, INLINE_DENTRY))
586 seq_puts(seq, ",inline_dentry");
Gu Zhengb270ad62014-04-11 17:49:55 +0800587 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900588 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700589 if (test_opt(sbi, NOBARRIER))
590 seq_puts(seq, ",nobarrier");
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700591 if (test_opt(sbi, FASTBOOT))
592 seq_puts(seq, ",fastboot");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900593 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
594
595 return 0;
596}
597
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900598static int segment_info_seq_show(struct seq_file *seq, void *offset)
599{
600 struct super_block *sb = seq->private;
601 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600602 unsigned int total_segs =
603 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900604 int i;
605
Chao Yu90aa6dc2014-03-17 10:31:06 +0800606 seq_puts(seq, "format: segment_type|valid_blocks\n"
607 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
608
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900609 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800610 struct seg_entry *se = get_seg_entry(sbi, i);
611
612 if ((i % 10) == 0)
613 seq_printf(seq, "%-5d", i);
614 seq_printf(seq, "%d|%-3u", se->type,
615 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800616 if ((i % 10) == 9 || i == (total_segs - 1))
617 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900618 else
Gu Zheng46c04362014-03-07 18:43:33 +0800619 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900620 }
Gu Zheng46c04362014-03-07 18:43:33 +0800621
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900622 return 0;
623}
624
625static int segment_info_open_fs(struct inode *inode, struct file *file)
626{
627 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
628}
629
630static const struct file_operations f2fs_seq_segment_info_fops = {
631 .owner = THIS_MODULE,
632 .open = segment_info_open_fs,
633 .read = seq_read,
634 .llseek = seq_lseek,
635 .release = single_release,
636};
637
Namjae Jeon696c0182013-06-16 09:48:48 +0900638static int f2fs_remount(struct super_block *sb, int *flags, char *data)
639{
640 struct f2fs_sb_info *sbi = F2FS_SB(sb);
641 struct f2fs_mount_info org_mount_opt;
642 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800643 bool need_restart_gc = false;
644 bool need_stop_gc = false;
Namjae Jeon696c0182013-06-16 09:48:48 +0900645
Theodore Ts'o02b99842014-03-13 10:14:33 -0400646 sync_filesystem(sb);
647
Namjae Jeon696c0182013-06-16 09:48:48 +0900648 /*
649 * Save the old mount options in case we
650 * need to restore them.
651 */
652 org_mount_opt = sbi->mount_opt;
653 active_logs = sbi->active_logs;
654
Chao Yu26666c82014-09-15 18:04:44 +0800655 sbi->mount_opt.opt = 0;
656 sbi->active_logs = NR_CURSEG_TYPE;
657
Namjae Jeon696c0182013-06-16 09:48:48 +0900658 /* parse mount options */
659 err = parse_options(sb, data);
660 if (err)
661 goto restore_opts;
662
663 /*
664 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +0800665 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +0900666 */
Chao Yu6b2920a2014-07-07 11:21:59 +0800667 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +0900668 goto skip;
669
670 /*
671 * We stop the GC thread if FS is mounted as RO
672 * or if background_gc = off is passed in mount
673 * option. Also sync the filesystem.
674 */
675 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
676 if (sbi->gc_thread) {
677 stop_gc_thread(sbi);
678 f2fs_sync_fs(sb, 1);
Gu Zheng876dc592014-04-11 17:50:00 +0800679 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +0900680 }
Chao Yuaba291b2014-11-18 11:17:20 +0800681 } else if (!sbi->gc_thread) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900682 err = start_gc_thread(sbi);
683 if (err)
684 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +0800685 need_stop_gc = true;
686 }
687
688 /*
689 * We stop issue flush thread if FS is mounted as RO
690 * or if flush_merge is not passed in mount option.
691 */
692 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +0800693 destroy_flush_cmd_control(sbi);
Chao Yuaba291b2014-11-18 11:17:20 +0800694 } else if (!SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +0800695 err = create_flush_cmd_control(sbi);
696 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800697 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +0900698 }
699skip:
700 /* Update the POSIXACL Flag */
701 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
702 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
703 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +0800704restore_gc:
705 if (need_restart_gc) {
706 if (start_gc_thread(sbi))
707 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +0900708 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +0800709 } else if (need_stop_gc) {
710 stop_gc_thread(sbi);
711 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900712restore_opts:
713 sbi->mount_opt = org_mount_opt;
714 sbi->active_logs = active_logs;
715 return err;
716}
717
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900718static struct super_operations f2fs_sops = {
719 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900720 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900721 .destroy_inode = f2fs_destroy_inode,
722 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900723 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900724 .show_options = f2fs_show_options,
725 .evict_inode = f2fs_evict_inode,
726 .put_super = f2fs_put_super,
727 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900728 .freeze_fs = f2fs_freeze,
729 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900730 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900731 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900732};
733
734static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
735 u64 ino, u32 generation)
736{
737 struct f2fs_sb_info *sbi = F2FS_SB(sb);
738 struct inode *inode;
739
Chao Yud6b7d4b2014-06-12 13:23:41 +0800740 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +0800741 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900742
743 /*
744 * f2fs_iget isn't quite right if the inode is currently unallocated!
745 * However f2fs_iget currently does appropriate checks to handle stale
746 * inodes so everything is OK.
747 */
748 inode = f2fs_iget(sb, ino);
749 if (IS_ERR(inode))
750 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900751 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900752 /* we didn't find the right inode.. */
753 iput(inode);
754 return ERR_PTR(-ESTALE);
755 }
756 return inode;
757}
758
759static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
760 int fh_len, int fh_type)
761{
762 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
763 f2fs_nfs_get_inode);
764}
765
766static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
767 int fh_len, int fh_type)
768{
769 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
770 f2fs_nfs_get_inode);
771}
772
773static const struct export_operations f2fs_export_ops = {
774 .fh_to_dentry = f2fs_fh_to_dentry,
775 .fh_to_parent = f2fs_fh_to_parent,
776 .get_parent = f2fs_get_parent,
777};
778
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900779static loff_t max_file_size(unsigned bits)
780{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900781 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900782 loff_t leaf_count = ADDRS_PER_BLOCK;
783
784 /* two direct node blocks */
785 result += (leaf_count * 2);
786
787 /* two indirect node blocks */
788 leaf_count *= NIDS_PER_BLOCK;
789 result += (leaf_count * 2);
790
791 /* one double indirect node block */
792 leaf_count *= NIDS_PER_BLOCK;
793 result += leaf_count;
794
795 result <<= bits;
796 return result;
797}
798
Namjae Jeona07ef782012-12-30 14:52:05 +0900799static int sanity_check_raw_super(struct super_block *sb,
800 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900801{
802 unsigned int blocksize;
803
Namjae Jeona07ef782012-12-30 14:52:05 +0900804 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
805 f2fs_msg(sb, KERN_INFO,
806 "Magic Mismatch, valid(0x%x) - read(0x%x)",
807 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900808 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900809 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900810
majianpeng5c9b4692013-02-01 19:07:57 +0800811 /* Currently, support only 4KB page cache size */
812 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
813 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800814 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800815 PAGE_CACHE_SIZE);
816 return 1;
817 }
818
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900819 /* Currently, support only 4KB block size */
820 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800821 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900822 f2fs_msg(sb, KERN_INFO,
823 "Invalid blocksize (%u), supports only 4KB\n",
824 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900825 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900826 }
majianpeng5c9b4692013-02-01 19:07:57 +0800827
Chao Yu55cf9cb2014-09-15 18:01:10 +0800828 /* Currently, support 512/1024/2048/4096 bytes sector size */
829 if (le32_to_cpu(raw_super->log_sectorsize) >
830 F2FS_MAX_LOG_SECTOR_SIZE ||
831 le32_to_cpu(raw_super->log_sectorsize) <
832 F2FS_MIN_LOG_SECTOR_SIZE) {
833 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
834 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900835 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900836 }
Chao Yu55cf9cb2014-09-15 18:01:10 +0800837 if (le32_to_cpu(raw_super->log_sectors_per_block) +
838 le32_to_cpu(raw_super->log_sectorsize) !=
839 F2FS_MAX_LOG_SECTOR_SIZE) {
840 f2fs_msg(sb, KERN_INFO,
841 "Invalid log sectors per block(%u) log sectorsize(%u)",
842 le32_to_cpu(raw_super->log_sectors_per_block),
843 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900844 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900845 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900846 return 0;
847}
848
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900849static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900850{
851 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900852 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
853 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900854
855 total = le32_to_cpu(raw_super->segment_count);
856 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
857 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
858 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
859 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
860 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
861
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900862 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900863 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900864
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -0700865 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900866 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
867 return 1;
868 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900869 return 0;
870}
871
872static void init_sb_info(struct f2fs_sb_info *sbi)
873{
874 struct f2fs_super_block *raw_super = sbi->raw_super;
875 int i;
876
877 sbi->log_sectors_per_block =
878 le32_to_cpu(raw_super->log_sectors_per_block);
879 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
880 sbi->blocksize = 1 << sbi->log_blocksize;
881 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
882 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
883 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
884 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
885 sbi->total_sections = le32_to_cpu(raw_super->section_count);
886 sbi->total_node_count =
887 (le32_to_cpu(raw_super->segment_count_nat) / 2)
888 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
889 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
890 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
891 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900892 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900893 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900894
895 for (i = 0; i < NR_COUNT_TYPE; i++)
896 atomic_set(&sbi->nr_pages[i], 0);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900897
898 sbi->dir_level = DEF_DIR_LEVEL;
Chao Yucaf00472015-01-28 17:48:42 +0800899 clear_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900900}
901
Gu Zheng9076a752013-10-14 18:47:11 +0800902/*
903 * Read f2fs raw super block.
904 * Because we have two copies of super block, so read the first one at first,
905 * if the first one is invalid, move to read the second one.
906 */
907static int read_raw_super_block(struct super_block *sb,
908 struct f2fs_super_block **raw_super,
909 struct buffer_head **raw_super_buf)
majianpeng14d7e9d2013-02-01 19:07:03 +0800910{
Gu Zheng9076a752013-10-14 18:47:11 +0800911 int block = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800912
Gu Zheng9076a752013-10-14 18:47:11 +0800913retry:
majianpeng14d7e9d2013-02-01 19:07:03 +0800914 *raw_super_buf = sb_bread(sb, block);
915 if (!*raw_super_buf) {
Gu Zheng9076a752013-10-14 18:47:11 +0800916 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
917 block + 1);
918 if (block == 0) {
919 block++;
920 goto retry;
921 } else {
922 return -EIO;
923 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800924 }
925
926 *raw_super = (struct f2fs_super_block *)
927 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
928
929 /* sanity checking of raw super */
Gu Zheng9076a752013-10-14 18:47:11 +0800930 if (sanity_check_raw_super(sb, *raw_super)) {
931 brelse(*raw_super_buf);
Chris Fries6c311ec2014-01-17 14:44:39 -0600932 f2fs_msg(sb, KERN_ERR,
933 "Can't find valid F2FS filesystem in %dth superblock",
934 block + 1);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900935 if (block == 0) {
Gu Zheng9076a752013-10-14 18:47:11 +0800936 block++;
937 goto retry;
938 } else {
939 return -EINVAL;
940 }
941 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800942
Gu Zheng9076a752013-10-14 18:47:11 +0800943 return 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800944}
945
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900946static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
947{
948 struct f2fs_sb_info *sbi;
Gu Zheng17306632014-10-20 17:45:53 +0800949 struct f2fs_super_block *raw_super = NULL;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900950 struct buffer_head *raw_super_buf;
951 struct inode *root;
952 long err = -EINVAL;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -0700953 bool retry = true;
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900954 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900955
Jaegeuk Kimed2e6212014-08-08 15:37:41 -0700956try_onemore:
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900957 /* allocate memory for f2fs-specific super block info */
958 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
959 if (!sbi)
960 return -ENOMEM;
961
Namjae Jeonff9234a2013-01-12 14:41:13 +0900962 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900963 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900964 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900965 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +0900966 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900967
Gu Zheng9076a752013-10-14 18:47:11 +0800968 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
969 if (err)
970 goto free_sbi;
971
Gu Zheng5fb08372013-06-07 14:16:53 +0800972 sb->s_fs_info = sbi;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900973 /* init some FS parameters */
974 sbi->active_logs = NR_CURSEG_TYPE;
975
976 set_opt(sbi, BG_GC);
977
978#ifdef CONFIG_F2FS_FS_XATTR
979 set_opt(sbi, XATTR_USER);
980#endif
981#ifdef CONFIG_F2FS_FS_POSIX_ACL
982 set_opt(sbi, POSIX_ACL);
983#endif
984 /* parse mount options */
Gu Zheng5fb08372013-06-07 14:16:53 +0800985 err = parse_options(sb, (char *)data);
Wei Yongjun66348b72013-04-12 10:23:18 +0800986 if (err)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900987 goto free_sb_buf;
988
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900989 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900990 sb->s_max_links = F2FS_LINK_MAX;
991 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
992
993 sb->s_op = &f2fs_sops;
994 sb->s_xattr = f2fs_xattr_handlers;
995 sb->s_export_op = &f2fs_export_ops;
996 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900997 sb->s_time_gran = 1;
998 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
999 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1000 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1001
1002 /* init f2fs-specific super block info */
1003 sbi->sb = sb;
1004 sbi->raw_super = raw_super;
1005 sbi->raw_super_buf = raw_super_buf;
1006 mutex_init(&sbi->gc_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001007 mutex_init(&sbi->writepages);
1008 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +08001009 init_rwsem(&sbi->node_write);
Chao Yucaf00472015-01-28 17:48:42 +08001010 clear_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001011 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001012
Chao Yudf0f8dc2014-03-22 14:57:23 +08001013 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001014 sbi->read_io.sbi = sbi;
1015 sbi->read_io.bio = NULL;
1016 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +08001017 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001018 sbi->write_io[i].sbi = sbi;
1019 sbi->write_io[i].bio = NULL;
1020 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001021
Gu Zhenge4795562013-09-27 18:08:30 +08001022 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +09001023 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001024 init_sb_info(sbi);
1025
1026 /* get an inode for meta space */
1027 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1028 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001029 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001030 err = PTR_ERR(sbi->meta_inode);
1031 goto free_sb_buf;
1032 }
1033
1034 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001035 if (err) {
1036 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001037 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +09001038 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001039
1040 /* sanity checking of checkpoint */
1041 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001042 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001043 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001044 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +09001045 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001046
1047 sbi->total_valid_node_count =
1048 le32_to_cpu(sbi->ckpt->valid_node_count);
1049 sbi->total_valid_inode_count =
1050 le32_to_cpu(sbi->ckpt->valid_inode_count);
1051 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1052 sbi->total_valid_block_count =
1053 le64_to_cpu(sbi->ckpt->valid_block_count);
1054 sbi->last_valid_block_count = sbi->total_valid_block_count;
1055 sbi->alloc_valid_block_count = 0;
1056 INIT_LIST_HEAD(&sbi->dir_inode_list);
1057 spin_lock_init(&sbi->dir_inode_lock);
1058
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001059 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001060
1061 /* setup f2fs internal modules */
1062 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001063 if (err) {
1064 f2fs_msg(sb, KERN_ERR,
1065 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001066 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001067 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001068 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001069 if (err) {
1070 f2fs_msg(sb, KERN_ERR,
1071 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001072 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001073 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001074
1075 build_gc_manager(sbi);
1076
1077 /* get an inode for node space */
1078 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1079 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001080 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001081 err = PTR_ERR(sbi->node_inode);
1082 goto free_nm;
1083 }
1084
1085 /* if there are nt orphan nodes free them */
Chao Yu8f99a942013-11-28 15:43:43 +08001086 recover_orphan_inodes(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001087
1088 /* read root inode and dentry */
1089 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1090 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001091 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001092 err = PTR_ERR(root);
1093 goto free_node_inode;
1094 }
Chao Yu8f99a942013-11-28 15:43:43 +08001095 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001096 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001097 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001098 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001099 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001100
1101 sb->s_root = d_make_root(root); /* allocate root dentry */
1102 if (!sb->s_root) {
1103 err = -ENOMEM;
1104 goto free_root_inode;
1105 }
1106
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001107 err = f2fs_build_stats(sbi);
1108 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001109 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001110
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001111 if (f2fs_proc_root)
1112 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1113
1114 if (sbi->s_proc)
1115 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1116 &f2fs_seq_segment_info_fops, sb);
1117
Namjae Jeond3ee4562013-03-17 17:26:14 +09001118 if (test_opt(sbi, DISCARD)) {
1119 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1120 if (!blk_queue_discard(q))
1121 f2fs_msg(sb, KERN_WARNING,
1122 "mounting with \"discard\" option, but "
1123 "the device does not support discard");
1124 }
1125
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001126 sbi->s_kobj.kset = f2fs_kset;
1127 init_completion(&sbi->s_kobj_unregister);
1128 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1129 "%s", sb->s_id);
1130 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001131 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001132
Jaegeuk Kimb0c44f02014-09-02 17:19:04 -07001133 if (!retry)
Chao Yucaf00472015-01-28 17:48:42 +08001134 set_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kimb0c44f02014-09-02 17:19:04 -07001135
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001136 /* recover fsynced data */
1137 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
1138 err = recover_fsync_data(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001139 if (err) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001140 f2fs_msg(sb, KERN_ERR,
1141 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001142 goto free_kobj;
1143 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001144 }
1145
1146 /*
1147 * If filesystem is not mounted as read-only then
1148 * do start the gc_thread.
1149 */
Chao Yu6c029932014-11-18 11:16:01 +08001150 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001151 /* After POR, we can run background GC thread.*/
1152 err = start_gc_thread(sbi);
1153 if (err)
1154 goto free_kobj;
1155 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001156 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001157
1158free_kobj:
1159 kobject_del(&sbi->s_kobj);
1160free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001161 if (sbi->s_proc) {
1162 remove_proc_entry("segment_info", sbi->s_proc);
1163 remove_proc_entry(sb->s_id, f2fs_proc_root);
1164 }
1165 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001166free_root_inode:
1167 dput(sb->s_root);
1168 sb->s_root = NULL;
1169free_node_inode:
1170 iput(sbi->node_inode);
1171free_nm:
1172 destroy_node_manager(sbi);
1173free_sm:
1174 destroy_segment_manager(sbi);
1175free_cp:
1176 kfree(sbi->ckpt);
1177free_meta_inode:
1178 make_bad_inode(sbi->meta_inode);
1179 iput(sbi->meta_inode);
1180free_sb_buf:
1181 brelse(raw_super_buf);
1182free_sbi:
1183 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001184
1185 /* give only one another chance */
1186 if (retry) {
Dan Carpenter922cedb2014-08-28 16:13:21 +03001187 retry = 0;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001188 shrink_dcache_sb(sb);
1189 goto try_onemore;
1190 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001191 return err;
1192}
1193
1194static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1195 const char *dev_name, void *data)
1196{
1197 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1198}
1199
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001200static void kill_f2fs_super(struct super_block *sb)
1201{
1202 if (sb->s_root)
Chao Yucaf00472015-01-28 17:48:42 +08001203 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001204 kill_block_super(sb);
1205}
1206
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001207static struct file_system_type f2fs_fs_type = {
1208 .owner = THIS_MODULE,
1209 .name = "f2fs",
1210 .mount = f2fs_mount,
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001211 .kill_sb = kill_f2fs_super,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001212 .fs_flags = FS_REQUIRES_DEV,
1213};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001214MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001215
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001216static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001217{
1218 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
Gu Zhenge8512d22014-03-07 18:43:28 +08001219 sizeof(struct f2fs_inode_info));
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001220 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001221 return -ENOMEM;
1222 return 0;
1223}
1224
1225static void destroy_inodecache(void)
1226{
1227 /*
1228 * Make sure all delayed rcu free inodes are flushed before we
1229 * destroy cache.
1230 */
1231 rcu_barrier();
1232 kmem_cache_destroy(f2fs_inode_cachep);
1233}
1234
1235static int __init init_f2fs_fs(void)
1236{
1237 int err;
1238
Jaegeuk Kimc0508652015-01-07 14:07:36 -08001239 f2fs_build_trace_ios();
1240
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001241 err = init_inodecache();
1242 if (err)
1243 goto fail;
1244 err = create_node_manager_caches();
1245 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001246 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001247 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001248 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001249 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001250 err = create_checkpoint_caches();
1251 if (err)
Chao Yu06292072014-12-29 15:56:18 +08001252 goto free_segment_manager_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001253 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001254 if (!f2fs_kset) {
1255 err = -ENOMEM;
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001256 goto free_checkpoint_caches;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001257 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001258 err = register_filesystem(&f2fs_fs_type);
1259 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001260 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001261 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001262 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001263 return 0;
1264
1265free_kset:
1266 kset_unregister(f2fs_kset);
1267free_checkpoint_caches:
1268 destroy_checkpoint_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001269free_segment_manager_caches:
1270 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001271free_node_manager_caches:
1272 destroy_node_manager_caches();
1273free_inodecache:
1274 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001275fail:
1276 return err;
1277}
1278
1279static void __exit exit_f2fs_fs(void)
1280{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001281 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001282 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001283 unregister_filesystem(&f2fs_fs_type);
1284 destroy_checkpoint_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001285 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001286 destroy_node_manager_caches();
1287 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001288 kset_unregister(f2fs_kset);
Jaegeuk Kim351f4fb2015-01-07 14:09:48 -08001289 f2fs_destroy_trace_ios();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001290}
1291
1292module_init(init_f2fs_fs)
1293module_exit(exit_f2fs_fs)
1294
1295MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1296MODULE_DESCRIPTION("Flash Friendly File System");
1297MODULE_LICENSE("GPL");