blob: b2dd1b01f07634e27f42fc09e8fd627a70395e3e [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,
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -080045 Opt_norecovery,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090046 Opt_discard,
47 Opt_noheap,
Kelly Anderson4058c512013-10-07 11:36:20 +090048 Opt_user_xattr,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090049 Opt_nouser_xattr,
Kelly Anderson4058c512013-10-07 11:36:20 +090050 Opt_acl,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090051 Opt_noacl,
52 Opt_active_logs,
53 Opt_disable_ext_identify,
Jaegeuk Kim444c5802013-08-08 15:16:22 +090054 Opt_inline_xattr,
Huajun Li8274de72013-11-10 23:13:17 +080055 Opt_inline_data,
Chao Yu5efd3c62014-09-24 18:16:13 +080056 Opt_inline_dentry,
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090057 Opt_flush_merge,
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070058 Opt_nobarrier,
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070059 Opt_fastboot,
Chao Yu89672152015-02-05 17:55:51 +080060 Opt_extent_cache,
Wanpeng Li75342792015-03-24 10:20:27 +080061 Opt_noinline_data,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090062 Opt_err,
63};
64
65static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090066 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090067 {Opt_disable_roll_forward, "disable_roll_forward"},
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -080068 {Opt_norecovery, "norecovery"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090069 {Opt_discard, "discard"},
70 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +090071 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090072 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +090073 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090074 {Opt_noacl, "noacl"},
75 {Opt_active_logs, "active_logs=%u"},
76 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +090077 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +080078 {Opt_inline_data, "inline_data"},
Chao Yu5efd3c62014-09-24 18:16:13 +080079 {Opt_inline_dentry, "inline_dentry"},
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090080 {Opt_flush_merge, "flush_merge"},
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070081 {Opt_nobarrier, "nobarrier"},
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070082 {Opt_fastboot, "fastboot"},
Chao Yu89672152015-02-05 17:55:51 +080083 {Opt_extent_cache, "extent_cache"},
Wanpeng Li75342792015-03-24 10:20:27 +080084 {Opt_noinline_data, "noinline_data"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090085 {Opt_err, NULL},
86};
87
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090088/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090089enum {
90 GC_THREAD, /* struct f2fs_gc_thread */
91 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090092 NM_INFO, /* struct f2fs_nm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +090093 F2FS_SBI, /* struct f2fs_sb_info */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090094};
95
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090096struct f2fs_attr {
97 struct attribute attr;
98 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
99 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
100 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900101 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900102 int offset;
103};
104
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900105static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
106{
107 if (struct_type == GC_THREAD)
108 return (unsigned char *)sbi->gc_thread;
109 else if (struct_type == SM_INFO)
110 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900111 else if (struct_type == NM_INFO)
112 return (unsigned char *)NM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900113 else if (struct_type == F2FS_SBI)
114 return (unsigned char *)sbi;
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900115 return NULL;
116}
117
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900118static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
119 struct f2fs_sb_info *sbi, char *buf)
120{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900121 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900122 unsigned int *ui;
123
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900124 ptr = __struct_ptr(sbi, a->struct_type);
125 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900126 return -EINVAL;
127
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900128 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900129
130 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
131}
132
133static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
134 struct f2fs_sb_info *sbi,
135 const char *buf, size_t count)
136{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900137 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900138 unsigned long t;
139 unsigned int *ui;
140 ssize_t ret;
141
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900142 ptr = __struct_ptr(sbi, a->struct_type);
143 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900144 return -EINVAL;
145
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900146 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900147
148 ret = kstrtoul(skip_spaces(buf), 0, &t);
149 if (ret < 0)
150 return ret;
151 *ui = t;
152 return count;
153}
154
155static ssize_t f2fs_attr_show(struct kobject *kobj,
156 struct attribute *attr, char *buf)
157{
158 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
159 s_kobj);
160 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
161
162 return a->show ? a->show(a, sbi, buf) : 0;
163}
164
165static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
166 const char *buf, size_t len)
167{
168 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
169 s_kobj);
170 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
171
172 return a->store ? a->store(a, sbi, buf, len) : 0;
173}
174
175static void f2fs_sb_release(struct kobject *kobj)
176{
177 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
178 s_kobj);
179 complete(&sbi->s_kobj_unregister);
180}
181
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900182#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900183static struct f2fs_attr f2fs_attr_##_name = { \
184 .attr = {.name = __stringify(_name), .mode = _mode }, \
185 .show = _show, \
186 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900187 .struct_type = _struct_type, \
188 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900189}
190
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900191#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
192 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
193 f2fs_sbi_show, f2fs_sbi_store, \
194 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900195
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900196F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
197F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
198F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
199F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
200F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900201F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800202F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900203F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
204F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700205F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900206F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900207F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900208F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900209
210#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
211static struct attribute *f2fs_attrs[] = {
212 ATTR_LIST(gc_min_sleep_time),
213 ATTR_LIST(gc_max_sleep_time),
214 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900215 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900216 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900217 ATTR_LIST(max_small_discards),
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800218 ATTR_LIST(batched_trim_sections),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900219 ATTR_LIST(ipu_policy),
220 ATTR_LIST(min_ipu_util),
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700221 ATTR_LIST(min_fsync_blocks),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900222 ATTR_LIST(max_victim_search),
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900223 ATTR_LIST(dir_level),
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900224 ATTR_LIST(ram_thresh),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900225 NULL,
226};
227
228static const struct sysfs_ops f2fs_attr_ops = {
229 .show = f2fs_attr_show,
230 .store = f2fs_attr_store,
231};
232
233static struct kobj_type f2fs_ktype = {
234 .default_attrs = f2fs_attrs,
235 .sysfs_ops = &f2fs_attr_ops,
236 .release = f2fs_sb_release,
237};
238
Namjae Jeona07ef782012-12-30 14:52:05 +0900239void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
240{
241 struct va_format vaf;
242 va_list args;
243
244 va_start(args, fmt);
245 vaf.fmt = fmt;
246 vaf.va = &args;
247 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
248 va_end(args);
249}
250
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900251static void init_once(void *foo)
252{
253 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
254
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900255 inode_init_once(&fi->vfs_inode);
256}
257
Namjae Jeon696c0182013-06-16 09:48:48 +0900258static int parse_options(struct super_block *sb, char *options)
259{
260 struct f2fs_sb_info *sbi = F2FS_SB(sb);
261 substring_t args[MAX_OPT_ARGS];
262 char *p, *name;
263 int arg = 0;
264
265 if (!options)
266 return 0;
267
268 while ((p = strsep(&options, ",")) != NULL) {
269 int token;
270 if (!*p)
271 continue;
272 /*
273 * Initialize args struct so we know whether arg was
274 * found; some options take optional arguments.
275 */
276 args[0].to = args[0].from = NULL;
277 token = match_token(p, f2fs_tokens, args);
278
279 switch (token) {
280 case Opt_gc_background:
281 name = match_strdup(&args[0]);
282
283 if (!name)
284 return -ENOMEM;
Chao Yu04c09382014-03-18 09:07:59 +0800285 if (strlen(name) == 2 && !strncmp(name, "on", 2))
Namjae Jeon696c0182013-06-16 09:48:48 +0900286 set_opt(sbi, BG_GC);
Chao Yu04c09382014-03-18 09:07:59 +0800287 else if (strlen(name) == 3 && !strncmp(name, "off", 3))
Namjae Jeon696c0182013-06-16 09:48:48 +0900288 clear_opt(sbi, BG_GC);
289 else {
290 kfree(name);
291 return -EINVAL;
292 }
293 kfree(name);
294 break;
295 case Opt_disable_roll_forward:
296 set_opt(sbi, DISABLE_ROLL_FORWARD);
297 break;
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -0800298 case Opt_norecovery:
299 /* this option mounts f2fs with ro */
300 set_opt(sbi, DISABLE_ROLL_FORWARD);
301 if (!f2fs_readonly(sb))
302 return -EINVAL;
303 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900304 case Opt_discard:
305 set_opt(sbi, DISCARD);
306 break;
307 case Opt_noheap:
308 set_opt(sbi, NOHEAP);
309 break;
310#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900311 case Opt_user_xattr:
312 set_opt(sbi, XATTR_USER);
313 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900314 case Opt_nouser_xattr:
315 clear_opt(sbi, XATTR_USER);
316 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900317 case Opt_inline_xattr:
318 set_opt(sbi, INLINE_XATTR);
319 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900320#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900321 case Opt_user_xattr:
322 f2fs_msg(sb, KERN_INFO,
323 "user_xattr options not supported");
324 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900325 case Opt_nouser_xattr:
326 f2fs_msg(sb, KERN_INFO,
327 "nouser_xattr options not supported");
328 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900329 case Opt_inline_xattr:
330 f2fs_msg(sb, KERN_INFO,
331 "inline_xattr options not supported");
332 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900333#endif
334#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900335 case Opt_acl:
336 set_opt(sbi, POSIX_ACL);
337 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900338 case Opt_noacl:
339 clear_opt(sbi, POSIX_ACL);
340 break;
341#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900342 case Opt_acl:
343 f2fs_msg(sb, KERN_INFO, "acl options not supported");
344 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900345 case Opt_noacl:
346 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
347 break;
348#endif
349 case Opt_active_logs:
350 if (args->from && match_int(args, &arg))
351 return -EINVAL;
352 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
353 return -EINVAL;
354 sbi->active_logs = arg;
355 break;
356 case Opt_disable_ext_identify:
357 set_opt(sbi, DISABLE_EXT_IDENTIFY);
358 break;
Huajun Li8274de72013-11-10 23:13:17 +0800359 case Opt_inline_data:
360 set_opt(sbi, INLINE_DATA);
361 break;
Chao Yu5efd3c62014-09-24 18:16:13 +0800362 case Opt_inline_dentry:
363 set_opt(sbi, INLINE_DENTRY);
364 break;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900365 case Opt_flush_merge:
366 set_opt(sbi, FLUSH_MERGE);
367 break;
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700368 case Opt_nobarrier:
369 set_opt(sbi, NOBARRIER);
370 break;
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700371 case Opt_fastboot:
372 set_opt(sbi, FASTBOOT);
373 break;
Chao Yu89672152015-02-05 17:55:51 +0800374 case Opt_extent_cache:
375 set_opt(sbi, EXTENT_CACHE);
376 break;
Wanpeng Li75342792015-03-24 10:20:27 +0800377 case Opt_noinline_data:
378 clear_opt(sbi, INLINE_DATA);
379 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900380 default:
381 f2fs_msg(sb, KERN_ERR,
382 "Unrecognized mount option \"%s\" or missing value",
383 p);
384 return -EINVAL;
385 }
386 }
387 return 0;
388}
389
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900390static struct inode *f2fs_alloc_inode(struct super_block *sb)
391{
392 struct f2fs_inode_info *fi;
393
Chao Yua0acdfe2013-12-05 09:54:00 +0800394 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900395 if (!fi)
396 return NULL;
397
398 init_once((void *) fi);
399
Masanari Iida434720f2013-03-19 08:03:35 +0900400 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900401 fi->vfs_inode.i_version = 1;
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700402 atomic_set(&fi->dirty_pages, 0);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900403 fi->i_current_depth = 1;
404 fi->i_advise = 0;
Chao Yu0c872e22015-02-05 17:46:29 +0800405 rwlock_init(&fi->ext_lock);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900406 init_rwsem(&fi->i_sem);
Jaegeuk Kim34ba94b2014-10-09 13:19:53 -0700407 INIT_RADIX_TREE(&fi->inmem_root, GFP_NOFS);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700408 INIT_LIST_HEAD(&fi->inmem_pages);
409 mutex_init(&fi->inmem_lock);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900410
411 set_inode_flag(fi, FI_NEW_INODE);
412
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900413 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
414 set_inode_flag(fi, FI_INLINE_XATTR);
415
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900416 /* Will be used by directory only */
417 fi->i_dir_level = F2FS_SB(sb)->dir_level;
418
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900419 return &fi->vfs_inode;
420}
421
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900422static int f2fs_drop_inode(struct inode *inode)
423{
424 /*
425 * This is to avoid a deadlock condition like below.
426 * writeback_single_inode(inode)
427 * - f2fs_write_data_page
428 * - f2fs_gc -> iput -> evict
429 * - inode_wait_for_writeback(inode)
430 */
431 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
432 return 0;
433 return generic_drop_inode(inode);
434}
435
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900436/*
437 * f2fs_dirty_inode() is called from __mark_inode_dirty()
438 *
439 * We should call set_dirty_inode to write the dirty inode through write_inode.
440 */
441static void f2fs_dirty_inode(struct inode *inode, int flags)
442{
443 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900444}
445
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900446static void f2fs_i_callback(struct rcu_head *head)
447{
448 struct inode *inode = container_of(head, struct inode, i_rcu);
449 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
450}
451
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900452static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900453{
454 call_rcu(&inode->i_rcu, f2fs_i_callback);
455}
456
457static void f2fs_put_super(struct super_block *sb)
458{
459 struct f2fs_sb_info *sbi = F2FS_SB(sb);
460
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900461 if (sbi->s_proc) {
462 remove_proc_entry("segment_info", sbi->s_proc);
463 remove_proc_entry(sb->s_id, f2fs_proc_root);
464 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900465 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900466
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900467 f2fs_destroy_stats(sbi);
468 stop_gc_thread(sbi);
469
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800470 /*
471 * We don't need to do checkpoint when superblock is clean.
472 * But, the previous checkpoint was not done by umount, it needs to do
473 * clean checkpoint again.
474 */
Chao Yucaf00472015-01-28 17:48:42 +0800475 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800476 !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) {
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700477 struct cp_control cpc = {
478 .reason = CP_UMOUNT,
479 };
480 write_checkpoint(sbi, &cpc);
481 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900482
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700483 /*
484 * normally superblock is clean, so we need to release this.
485 * In addition, EIO will skip do checkpoint, we need this as well.
486 */
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700487 release_dirty_inode(sbi);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700488 release_discard_addrs(sbi);
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700489
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900490 iput(sbi->node_inode);
491 iput(sbi->meta_inode);
492
493 /* destroy f2fs internal modules */
494 destroy_node_manager(sbi);
495 destroy_segment_manager(sbi);
496
497 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900498 kobject_put(&sbi->s_kobj);
499 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900500
501 sb->s_fs_info = NULL;
502 brelse(sbi->raw_super_buf);
503 kfree(sbi);
504}
505
506int f2fs_sync_fs(struct super_block *sb, int sync)
507{
508 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900509
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900510 trace_f2fs_sync_fs(sb, sync);
511
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900512 if (sync) {
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700513 struct cp_control cpc;
514
Jaegeuk Kim119ee912015-01-29 11:45:33 -0800515 cpc.reason = __get_cp_reason(sbi);
516
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900517 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700518 write_checkpoint(sbi, &cpc);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900519 mutex_unlock(&sbi->gc_mutex);
520 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900521 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900522 }
Jaegeuk Kimdb9f7c12014-12-17 20:04:08 -0800523 f2fs_trace_ios(NULL, NULL, 1);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900524
Namjae Jeon64c576f2012-12-22 12:10:27 +0900525 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900526}
527
Changman Leed6212a52013-01-29 18:30:07 +0900528static int f2fs_freeze(struct super_block *sb)
529{
530 int err;
531
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900532 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900533 return 0;
534
535 err = f2fs_sync_fs(sb, 1);
536 return err;
537}
538
539static int f2fs_unfreeze(struct super_block *sb)
540{
541 return 0;
542}
543
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900544static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
545{
546 struct super_block *sb = dentry->d_sb;
547 struct f2fs_sb_info *sbi = F2FS_SB(sb);
548 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
549 block_t total_count, user_block_count, start_count, ovp_count;
550
551 total_count = le64_to_cpu(sbi->raw_super->block_count);
552 user_block_count = sbi->user_block_count;
553 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
554 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
555 buf->f_type = F2FS_SUPER_MAGIC;
556 buf->f_bsize = sbi->blocksize;
557
558 buf->f_blocks = total_count - start_count;
559 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
560 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
561
Chao Yuc200b1a2014-08-20 18:36:46 +0800562 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
563 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900564
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900565 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900566 buf->f_fsid.val[0] = (u32)id;
567 buf->f_fsid.val[1] = (u32)(id >> 32);
568
569 return 0;
570}
571
572static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
573{
574 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
575
Gu Zhengb270ad62014-04-11 17:49:55 +0800576 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
Namjae Jeon696c0182013-06-16 09:48:48 +0900577 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900578 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900579 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900580 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
581 seq_puts(seq, ",disable_roll_forward");
582 if (test_opt(sbi, DISCARD))
583 seq_puts(seq, ",discard");
584 if (test_opt(sbi, NOHEAP))
585 seq_puts(seq, ",no_heap_alloc");
586#ifdef CONFIG_F2FS_FS_XATTR
587 if (test_opt(sbi, XATTR_USER))
588 seq_puts(seq, ",user_xattr");
589 else
590 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900591 if (test_opt(sbi, INLINE_XATTR))
592 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900593#endif
594#ifdef CONFIG_F2FS_FS_POSIX_ACL
595 if (test_opt(sbi, POSIX_ACL))
596 seq_puts(seq, ",acl");
597 else
598 seq_puts(seq, ",noacl");
599#endif
600 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100601 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800602 if (test_opt(sbi, INLINE_DATA))
603 seq_puts(seq, ",inline_data");
Wanpeng Li75342792015-03-24 10:20:27 +0800604 else
605 seq_puts(seq, ",noinline_data");
Chao Yu5efd3c62014-09-24 18:16:13 +0800606 if (test_opt(sbi, INLINE_DENTRY))
607 seq_puts(seq, ",inline_dentry");
Gu Zhengb270ad62014-04-11 17:49:55 +0800608 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900609 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700610 if (test_opt(sbi, NOBARRIER))
611 seq_puts(seq, ",nobarrier");
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700612 if (test_opt(sbi, FASTBOOT))
613 seq_puts(seq, ",fastboot");
Chao Yu89672152015-02-05 17:55:51 +0800614 if (test_opt(sbi, EXTENT_CACHE))
615 seq_puts(seq, ",extent_cache");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900616 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
617
618 return 0;
619}
620
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900621static int segment_info_seq_show(struct seq_file *seq, void *offset)
622{
623 struct super_block *sb = seq->private;
624 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600625 unsigned int total_segs =
626 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900627 int i;
628
Chao Yu90aa6dc2014-03-17 10:31:06 +0800629 seq_puts(seq, "format: segment_type|valid_blocks\n"
630 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
631
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900632 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800633 struct seg_entry *se = get_seg_entry(sbi, i);
634
635 if ((i % 10) == 0)
636 seq_printf(seq, "%-5d", i);
637 seq_printf(seq, "%d|%-3u", se->type,
638 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800639 if ((i % 10) == 9 || i == (total_segs - 1))
640 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900641 else
Gu Zheng46c04362014-03-07 18:43:33 +0800642 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900643 }
Gu Zheng46c04362014-03-07 18:43:33 +0800644
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900645 return 0;
646}
647
648static int segment_info_open_fs(struct inode *inode, struct file *file)
649{
650 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
651}
652
653static const struct file_operations f2fs_seq_segment_info_fops = {
654 .owner = THIS_MODULE,
655 .open = segment_info_open_fs,
656 .read = seq_read,
657 .llseek = seq_lseek,
658 .release = single_release,
659};
660
Namjae Jeon696c0182013-06-16 09:48:48 +0900661static int f2fs_remount(struct super_block *sb, int *flags, char *data)
662{
663 struct f2fs_sb_info *sbi = F2FS_SB(sb);
664 struct f2fs_mount_info org_mount_opt;
665 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800666 bool need_restart_gc = false;
667 bool need_stop_gc = false;
Namjae Jeon696c0182013-06-16 09:48:48 +0900668
Theodore Ts'o02b99842014-03-13 10:14:33 -0400669 sync_filesystem(sb);
670
Namjae Jeon696c0182013-06-16 09:48:48 +0900671 /*
672 * Save the old mount options in case we
673 * need to restore them.
674 */
675 org_mount_opt = sbi->mount_opt;
676 active_logs = sbi->active_logs;
677
Chao Yu26666c82014-09-15 18:04:44 +0800678 sbi->mount_opt.opt = 0;
679 sbi->active_logs = NR_CURSEG_TYPE;
680
Namjae Jeon696c0182013-06-16 09:48:48 +0900681 /* parse mount options */
682 err = parse_options(sb, data);
683 if (err)
684 goto restore_opts;
685
686 /*
687 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +0800688 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +0900689 */
Chao Yu6b2920a2014-07-07 11:21:59 +0800690 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +0900691 goto skip;
692
693 /*
694 * We stop the GC thread if FS is mounted as RO
695 * or if background_gc = off is passed in mount
696 * option. Also sync the filesystem.
697 */
698 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
699 if (sbi->gc_thread) {
700 stop_gc_thread(sbi);
701 f2fs_sync_fs(sb, 1);
Gu Zheng876dc592014-04-11 17:50:00 +0800702 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +0900703 }
Chao Yuaba291b2014-11-18 11:17:20 +0800704 } else if (!sbi->gc_thread) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900705 err = start_gc_thread(sbi);
706 if (err)
707 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +0800708 need_stop_gc = true;
709 }
710
711 /*
712 * We stop issue flush thread if FS is mounted as RO
713 * or if flush_merge is not passed in mount option.
714 */
715 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +0800716 destroy_flush_cmd_control(sbi);
Chao Yuaba291b2014-11-18 11:17:20 +0800717 } else if (!SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +0800718 err = create_flush_cmd_control(sbi);
719 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800720 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +0900721 }
722skip:
723 /* Update the POSIXACL Flag */
724 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
725 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
726 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +0800727restore_gc:
728 if (need_restart_gc) {
729 if (start_gc_thread(sbi))
730 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +0900731 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +0800732 } else if (need_stop_gc) {
733 stop_gc_thread(sbi);
734 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900735restore_opts:
736 sbi->mount_opt = org_mount_opt;
737 sbi->active_logs = active_logs;
738 return err;
739}
740
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900741static struct super_operations f2fs_sops = {
742 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900743 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900744 .destroy_inode = f2fs_destroy_inode,
745 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900746 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900747 .show_options = f2fs_show_options,
748 .evict_inode = f2fs_evict_inode,
749 .put_super = f2fs_put_super,
750 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900751 .freeze_fs = f2fs_freeze,
752 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900753 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900754 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900755};
756
757static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
758 u64 ino, u32 generation)
759{
760 struct f2fs_sb_info *sbi = F2FS_SB(sb);
761 struct inode *inode;
762
Chao Yud6b7d4b2014-06-12 13:23:41 +0800763 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +0800764 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900765
766 /*
767 * f2fs_iget isn't quite right if the inode is currently unallocated!
768 * However f2fs_iget currently does appropriate checks to handle stale
769 * inodes so everything is OK.
770 */
771 inode = f2fs_iget(sb, ino);
772 if (IS_ERR(inode))
773 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900774 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900775 /* we didn't find the right inode.. */
776 iput(inode);
777 return ERR_PTR(-ESTALE);
778 }
779 return inode;
780}
781
782static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
783 int fh_len, int fh_type)
784{
785 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
786 f2fs_nfs_get_inode);
787}
788
789static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
790 int fh_len, int fh_type)
791{
792 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
793 f2fs_nfs_get_inode);
794}
795
796static const struct export_operations f2fs_export_ops = {
797 .fh_to_dentry = f2fs_fh_to_dentry,
798 .fh_to_parent = f2fs_fh_to_parent,
799 .get_parent = f2fs_get_parent,
800};
801
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900802static loff_t max_file_size(unsigned bits)
803{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900804 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900805 loff_t leaf_count = ADDRS_PER_BLOCK;
806
807 /* two direct node blocks */
808 result += (leaf_count * 2);
809
810 /* two indirect node blocks */
811 leaf_count *= NIDS_PER_BLOCK;
812 result += (leaf_count * 2);
813
814 /* one double indirect node block */
815 leaf_count *= NIDS_PER_BLOCK;
816 result += leaf_count;
817
818 result <<= bits;
819 return result;
820}
821
Namjae Jeona07ef782012-12-30 14:52:05 +0900822static int sanity_check_raw_super(struct super_block *sb,
823 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900824{
825 unsigned int blocksize;
826
Namjae Jeona07ef782012-12-30 14:52:05 +0900827 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
828 f2fs_msg(sb, KERN_INFO,
829 "Magic Mismatch, valid(0x%x) - read(0x%x)",
830 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900831 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900832 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900833
majianpeng5c9b4692013-02-01 19:07:57 +0800834 /* Currently, support only 4KB page cache size */
835 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
836 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800837 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800838 PAGE_CACHE_SIZE);
839 return 1;
840 }
841
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900842 /* Currently, support only 4KB block size */
843 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800844 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900845 f2fs_msg(sb, KERN_INFO,
846 "Invalid blocksize (%u), supports only 4KB\n",
847 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900848 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900849 }
majianpeng5c9b4692013-02-01 19:07:57 +0800850
Chao Yu55cf9cb2014-09-15 18:01:10 +0800851 /* Currently, support 512/1024/2048/4096 bytes sector size */
852 if (le32_to_cpu(raw_super->log_sectorsize) >
853 F2FS_MAX_LOG_SECTOR_SIZE ||
854 le32_to_cpu(raw_super->log_sectorsize) <
855 F2FS_MIN_LOG_SECTOR_SIZE) {
856 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
857 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900858 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900859 }
Chao Yu55cf9cb2014-09-15 18:01:10 +0800860 if (le32_to_cpu(raw_super->log_sectors_per_block) +
861 le32_to_cpu(raw_super->log_sectorsize) !=
862 F2FS_MAX_LOG_SECTOR_SIZE) {
863 f2fs_msg(sb, KERN_INFO,
864 "Invalid log sectors per block(%u) log sectorsize(%u)",
865 le32_to_cpu(raw_super->log_sectors_per_block),
866 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900867 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900868 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900869 return 0;
870}
871
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900872static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900873{
874 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900875 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
876 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900877
878 total = le32_to_cpu(raw_super->segment_count);
879 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
880 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
881 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
882 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
883 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
884
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900885 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900886 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900887
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -0700888 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900889 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
890 return 1;
891 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900892 return 0;
893}
894
895static void init_sb_info(struct f2fs_sb_info *sbi)
896{
897 struct f2fs_super_block *raw_super = sbi->raw_super;
898 int i;
899
900 sbi->log_sectors_per_block =
901 le32_to_cpu(raw_super->log_sectors_per_block);
902 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
903 sbi->blocksize = 1 << sbi->log_blocksize;
904 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
905 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
906 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
907 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
908 sbi->total_sections = le32_to_cpu(raw_super->section_count);
909 sbi->total_node_count =
910 (le32_to_cpu(raw_super->segment_count_nat) / 2)
911 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
912 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
913 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
914 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900915 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900916 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900917
918 for (i = 0; i < NR_COUNT_TYPE; i++)
919 atomic_set(&sbi->nr_pages[i], 0);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900920
921 sbi->dir_level = DEF_DIR_LEVEL;
Chao Yucaf00472015-01-28 17:48:42 +0800922 clear_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900923}
924
Gu Zheng9076a752013-10-14 18:47:11 +0800925/*
926 * Read f2fs raw super block.
927 * Because we have two copies of super block, so read the first one at first,
928 * if the first one is invalid, move to read the second one.
929 */
930static int read_raw_super_block(struct super_block *sb,
931 struct f2fs_super_block **raw_super,
932 struct buffer_head **raw_super_buf)
majianpeng14d7e9d2013-02-01 19:07:03 +0800933{
Gu Zheng9076a752013-10-14 18:47:11 +0800934 int block = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800935
Gu Zheng9076a752013-10-14 18:47:11 +0800936retry:
majianpeng14d7e9d2013-02-01 19:07:03 +0800937 *raw_super_buf = sb_bread(sb, block);
938 if (!*raw_super_buf) {
Gu Zheng9076a752013-10-14 18:47:11 +0800939 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
940 block + 1);
941 if (block == 0) {
942 block++;
943 goto retry;
944 } else {
945 return -EIO;
946 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800947 }
948
949 *raw_super = (struct f2fs_super_block *)
950 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
951
952 /* sanity checking of raw super */
Gu Zheng9076a752013-10-14 18:47:11 +0800953 if (sanity_check_raw_super(sb, *raw_super)) {
954 brelse(*raw_super_buf);
Chris Fries6c311ec2014-01-17 14:44:39 -0600955 f2fs_msg(sb, KERN_ERR,
956 "Can't find valid F2FS filesystem in %dth superblock",
957 block + 1);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900958 if (block == 0) {
Gu Zheng9076a752013-10-14 18:47:11 +0800959 block++;
960 goto retry;
961 } else {
962 return -EINVAL;
963 }
964 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800965
Gu Zheng9076a752013-10-14 18:47:11 +0800966 return 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800967}
968
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900969static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
970{
971 struct f2fs_sb_info *sbi;
Gu Zheng17306632014-10-20 17:45:53 +0800972 struct f2fs_super_block *raw_super = NULL;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900973 struct buffer_head *raw_super_buf;
974 struct inode *root;
975 long err = -EINVAL;
Chao Yu2adc3502015-03-16 21:08:44 +0800976 bool retry = true, need_fsck = false;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -0800977 char *options = NULL;
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900978 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900979
Jaegeuk Kimed2e6212014-08-08 15:37:41 -0700980try_onemore:
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900981 /* allocate memory for f2fs-specific super block info */
982 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
983 if (!sbi)
984 return -ENOMEM;
985
Namjae Jeonff9234a2013-01-12 14:41:13 +0900986 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900987 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900988 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900989 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +0900990 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900991
Gu Zheng9076a752013-10-14 18:47:11 +0800992 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
993 if (err)
994 goto free_sbi;
995
Gu Zheng5fb08372013-06-07 14:16:53 +0800996 sb->s_fs_info = sbi;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900997 /* init some FS parameters */
998 sbi->active_logs = NR_CURSEG_TYPE;
999
1000 set_opt(sbi, BG_GC);
Wanpeng Li75342792015-03-24 10:20:27 +08001001 set_opt(sbi, INLINE_DATA);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001002
1003#ifdef CONFIG_F2FS_FS_XATTR
1004 set_opt(sbi, XATTR_USER);
1005#endif
1006#ifdef CONFIG_F2FS_FS_POSIX_ACL
1007 set_opt(sbi, POSIX_ACL);
1008#endif
1009 /* parse mount options */
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001010 options = kstrdup((const char *)data, GFP_KERNEL);
1011 if (data && !options) {
1012 err = -ENOMEM;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001013 goto free_sb_buf;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001014 }
1015
1016 err = parse_options(sb, options);
1017 if (err)
1018 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001019
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001020 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001021 sb->s_max_links = F2FS_LINK_MAX;
1022 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1023
1024 sb->s_op = &f2fs_sops;
1025 sb->s_xattr = f2fs_xattr_handlers;
1026 sb->s_export_op = &f2fs_export_ops;
1027 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001028 sb->s_time_gran = 1;
1029 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1030 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1031 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1032
1033 /* init f2fs-specific super block info */
1034 sbi->sb = sb;
1035 sbi->raw_super = raw_super;
1036 sbi->raw_super_buf = raw_super_buf;
1037 mutex_init(&sbi->gc_mutex);
Jaegeuk Kim5463e7c2015-04-21 10:40:54 -07001038 mutex_init(&sbi->writepages);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001039 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +08001040 init_rwsem(&sbi->node_write);
Chao Yucaf00472015-01-28 17:48:42 +08001041 clear_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001042 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001043
Chao Yudf0f8dc2014-03-22 14:57:23 +08001044 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001045 sbi->read_io.sbi = sbi;
1046 sbi->read_io.bio = NULL;
1047 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +08001048 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001049 sbi->write_io[i].sbi = sbi;
1050 sbi->write_io[i].bio = NULL;
1051 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001052
Gu Zhenge4795562013-09-27 18:08:30 +08001053 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +09001054 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001055 init_sb_info(sbi);
1056
1057 /* get an inode for meta space */
1058 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1059 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001060 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001061 err = PTR_ERR(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001062 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001063 }
1064
1065 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001066 if (err) {
1067 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001068 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +09001069 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001070
1071 /* sanity checking of checkpoint */
1072 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001073 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001074 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001075 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +09001076 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001077
1078 sbi->total_valid_node_count =
1079 le32_to_cpu(sbi->ckpt->valid_node_count);
1080 sbi->total_valid_inode_count =
1081 le32_to_cpu(sbi->ckpt->valid_inode_count);
1082 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1083 sbi->total_valid_block_count =
1084 le64_to_cpu(sbi->ckpt->valid_block_count);
1085 sbi->last_valid_block_count = sbi->total_valid_block_count;
1086 sbi->alloc_valid_block_count = 0;
1087 INIT_LIST_HEAD(&sbi->dir_inode_list);
1088 spin_lock_init(&sbi->dir_inode_lock);
1089
Chao Yu1dcc3362015-02-05 17:57:31 +08001090 init_extent_cache_info(sbi);
1091
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001092 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001093
1094 /* setup f2fs internal modules */
1095 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001096 if (err) {
1097 f2fs_msg(sb, KERN_ERR,
1098 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001099 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001100 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001101 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001102 if (err) {
1103 f2fs_msg(sb, KERN_ERR,
1104 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001105 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001106 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001107
1108 build_gc_manager(sbi);
1109
1110 /* get an inode for node space */
1111 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1112 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001113 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001114 err = PTR_ERR(sbi->node_inode);
1115 goto free_nm;
1116 }
1117
1118 /* if there are nt orphan nodes free them */
Chao Yu8f99a942013-11-28 15:43:43 +08001119 recover_orphan_inodes(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001120
1121 /* read root inode and dentry */
1122 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1123 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001124 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001125 err = PTR_ERR(root);
1126 goto free_node_inode;
1127 }
Chao Yu8f99a942013-11-28 15:43:43 +08001128 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001129 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001130 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001131 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001132 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001133
1134 sb->s_root = d_make_root(root); /* allocate root dentry */
1135 if (!sb->s_root) {
1136 err = -ENOMEM;
1137 goto free_root_inode;
1138 }
1139
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001140 err = f2fs_build_stats(sbi);
1141 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001142 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001143
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001144 if (f2fs_proc_root)
1145 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1146
1147 if (sbi->s_proc)
1148 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1149 &f2fs_seq_segment_info_fops, sb);
1150
Namjae Jeond3ee4562013-03-17 17:26:14 +09001151 if (test_opt(sbi, DISCARD)) {
1152 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1153 if (!blk_queue_discard(q))
1154 f2fs_msg(sb, KERN_WARNING,
1155 "mounting with \"discard\" option, but "
1156 "the device does not support discard");
1157 }
1158
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001159 sbi->s_kobj.kset = f2fs_kset;
1160 init_completion(&sbi->s_kobj_unregister);
1161 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1162 "%s", sb->s_id);
1163 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001164 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001165
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001166 /* recover fsynced data */
1167 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
Jaegeuk Kim081d78c2015-01-23 19:16:59 -08001168 /*
1169 * mount should be failed, when device has readonly mode, and
1170 * previous checkpoint was not done by clean system shutdown.
1171 */
1172 if (bdev_read_only(sb->s_bdev) &&
1173 !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) {
1174 err = -EROFS;
1175 goto free_kobj;
1176 }
Chao Yu2adc3502015-03-16 21:08:44 +08001177
1178 if (need_fsck)
1179 set_sbi_flag(sbi, SBI_NEED_FSCK);
1180
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001181 err = recover_fsync_data(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001182 if (err) {
Chao Yu2adc3502015-03-16 21:08:44 +08001183 need_fsck = true;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001184 f2fs_msg(sb, KERN_ERR,
1185 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001186 goto free_kobj;
1187 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001188 }
1189
1190 /*
1191 * If filesystem is not mounted as read-only then
1192 * do start the gc_thread.
1193 */
Chao Yu6c029932014-11-18 11:16:01 +08001194 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001195 /* After POR, we can run background GC thread.*/
1196 err = start_gc_thread(sbi);
1197 if (err)
1198 goto free_kobj;
1199 }
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001200 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001201 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001202
1203free_kobj:
1204 kobject_del(&sbi->s_kobj);
1205free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001206 if (sbi->s_proc) {
1207 remove_proc_entry("segment_info", sbi->s_proc);
1208 remove_proc_entry(sb->s_id, f2fs_proc_root);
1209 }
1210 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001211free_root_inode:
1212 dput(sb->s_root);
1213 sb->s_root = NULL;
1214free_node_inode:
1215 iput(sbi->node_inode);
1216free_nm:
1217 destroy_node_manager(sbi);
1218free_sm:
1219 destroy_segment_manager(sbi);
1220free_cp:
1221 kfree(sbi->ckpt);
1222free_meta_inode:
1223 make_bad_inode(sbi->meta_inode);
1224 iput(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001225free_options:
1226 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001227free_sb_buf:
1228 brelse(raw_super_buf);
1229free_sbi:
1230 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001231
1232 /* give only one another chance */
1233 if (retry) {
Taehee Yoo9df47ba2015-04-13 21:48:06 +09001234 retry = false;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001235 shrink_dcache_sb(sb);
1236 goto try_onemore;
1237 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001238 return err;
1239}
1240
1241static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1242 const char *dev_name, void *data)
1243{
1244 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1245}
1246
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001247static void kill_f2fs_super(struct super_block *sb)
1248{
1249 if (sb->s_root)
Chao Yucaf00472015-01-28 17:48:42 +08001250 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001251 kill_block_super(sb);
1252}
1253
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001254static struct file_system_type f2fs_fs_type = {
1255 .owner = THIS_MODULE,
1256 .name = "f2fs",
1257 .mount = f2fs_mount,
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001258 .kill_sb = kill_f2fs_super,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001259 .fs_flags = FS_REQUIRES_DEV,
1260};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001261MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001262
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001263static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001264{
1265 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
Gu Zhenge8512d22014-03-07 18:43:28 +08001266 sizeof(struct f2fs_inode_info));
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001267 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001268 return -ENOMEM;
1269 return 0;
1270}
1271
1272static void destroy_inodecache(void)
1273{
1274 /*
1275 * Make sure all delayed rcu free inodes are flushed before we
1276 * destroy cache.
1277 */
1278 rcu_barrier();
1279 kmem_cache_destroy(f2fs_inode_cachep);
1280}
1281
1282static int __init init_f2fs_fs(void)
1283{
1284 int err;
1285
Jaegeuk Kimc0508652015-01-07 14:07:36 -08001286 f2fs_build_trace_ios();
1287
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001288 err = init_inodecache();
1289 if (err)
1290 goto fail;
1291 err = create_node_manager_caches();
1292 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001293 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001294 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001295 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001296 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001297 err = create_checkpoint_caches();
1298 if (err)
Chao Yu06292072014-12-29 15:56:18 +08001299 goto free_segment_manager_caches;
Chao Yu1dcc3362015-02-05 17:57:31 +08001300 err = create_extent_cache();
1301 if (err)
1302 goto free_checkpoint_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001303 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001304 if (!f2fs_kset) {
1305 err = -ENOMEM;
Chao Yu1dcc3362015-02-05 17:57:31 +08001306 goto free_extent_cache;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001307 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001308 err = register_filesystem(&f2fs_fs_type);
1309 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001310 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001311 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001312 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001313 return 0;
1314
1315free_kset:
1316 kset_unregister(f2fs_kset);
Chao Yu1dcc3362015-02-05 17:57:31 +08001317free_extent_cache:
1318 destroy_extent_cache();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001319free_checkpoint_caches:
1320 destroy_checkpoint_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001321free_segment_manager_caches:
1322 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001323free_node_manager_caches:
1324 destroy_node_manager_caches();
1325free_inodecache:
1326 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001327fail:
1328 return err;
1329}
1330
1331static void __exit exit_f2fs_fs(void)
1332{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001333 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001334 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001335 unregister_filesystem(&f2fs_fs_type);
Wanpeng Lifdf6c8b2015-03-06 15:00:54 +08001336 destroy_extent_cache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001337 destroy_checkpoint_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001338 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001339 destroy_node_manager_caches();
1340 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001341 kset_unregister(f2fs_kset);
Jaegeuk Kim351f4fb2015-01-07 14:09:48 -08001342 f2fs_destroy_trace_ios();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001343}
1344
1345module_init(init_f2fs_fs)
1346module_exit(exit_f2fs_fs)
1347
1348MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1349MODULE_DESCRIPTION("Flash Friendly File System");
1350MODULE_LICENSE("GPL");