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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 Kim57e50552015-04-20 19:52:47 -0700419#ifdef CONFIG_F2FS_FS_ENCRYPTION
420 fi->i_crypt_info = NULL;
421#endif
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900422 return &fi->vfs_inode;
423}
424
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900425static int f2fs_drop_inode(struct inode *inode)
426{
427 /*
428 * This is to avoid a deadlock condition like below.
429 * writeback_single_inode(inode)
430 * - f2fs_write_data_page
431 * - f2fs_gc -> iput -> evict
432 * - inode_wait_for_writeback(inode)
433 */
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700434 if (!inode_unhashed(inode) && inode->i_state & I_SYNC) {
435 if (!inode->i_nlink && !is_bad_inode(inode)) {
436 spin_unlock(&inode->i_lock);
437
438 /* some remained atomic pages should discarded */
439 if (f2fs_is_atomic_file(inode))
440 commit_inmem_pages(inode, true);
441
442 sb_start_intwrite(inode->i_sb);
443 i_size_write(inode, 0);
444
445 if (F2FS_HAS_BLOCKS(inode))
446 f2fs_truncate(inode);
447
448 sb_end_intwrite(inode->i_sb);
449
450#ifdef CONFIG_F2FS_FS_ENCRYPTION
451 if (F2FS_I(inode)->i_crypt_info)
452 f2fs_free_encryption_info(inode);
453#endif
454 spin_lock(&inode->i_lock);
455 }
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900456 return 0;
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700457 }
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900458 return generic_drop_inode(inode);
459}
460
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900461/*
462 * f2fs_dirty_inode() is called from __mark_inode_dirty()
463 *
464 * We should call set_dirty_inode to write the dirty inode through write_inode.
465 */
466static void f2fs_dirty_inode(struct inode *inode, int flags)
467{
468 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900469}
470
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900471static void f2fs_i_callback(struct rcu_head *head)
472{
473 struct inode *inode = container_of(head, struct inode, i_rcu);
474 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
475}
476
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900477static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900478{
479 call_rcu(&inode->i_rcu, f2fs_i_callback);
480}
481
482static void f2fs_put_super(struct super_block *sb)
483{
484 struct f2fs_sb_info *sbi = F2FS_SB(sb);
485
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900486 if (sbi->s_proc) {
487 remove_proc_entry("segment_info", sbi->s_proc);
488 remove_proc_entry(sb->s_id, f2fs_proc_root);
489 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900490 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900491
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900492 f2fs_destroy_stats(sbi);
493 stop_gc_thread(sbi);
494
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800495 /*
496 * We don't need to do checkpoint when superblock is clean.
497 * But, the previous checkpoint was not done by umount, it needs to do
498 * clean checkpoint again.
499 */
Chao Yucaf00472015-01-28 17:48:42 +0800500 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800501 !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) {
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700502 struct cp_control cpc = {
503 .reason = CP_UMOUNT,
504 };
505 write_checkpoint(sbi, &cpc);
506 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900507
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700508 /*
509 * normally superblock is clean, so we need to release this.
510 * In addition, EIO will skip do checkpoint, we need this as well.
511 */
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700512 release_dirty_inode(sbi);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700513 release_discard_addrs(sbi);
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700514
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900515 iput(sbi->node_inode);
516 iput(sbi->meta_inode);
517
518 /* destroy f2fs internal modules */
519 destroy_node_manager(sbi);
520 destroy_segment_manager(sbi);
521
522 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900523 kobject_put(&sbi->s_kobj);
524 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900525
526 sb->s_fs_info = NULL;
527 brelse(sbi->raw_super_buf);
528 kfree(sbi);
529}
530
531int f2fs_sync_fs(struct super_block *sb, int sync)
532{
533 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900534
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900535 trace_f2fs_sync_fs(sb, sync);
536
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900537 if (sync) {
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700538 struct cp_control cpc;
539
Jaegeuk Kim119ee912015-01-29 11:45:33 -0800540 cpc.reason = __get_cp_reason(sbi);
541
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900542 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700543 write_checkpoint(sbi, &cpc);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900544 mutex_unlock(&sbi->gc_mutex);
545 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900546 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900547 }
Jaegeuk Kim05ca3632015-04-23 14:38:15 -0700548 f2fs_trace_ios(NULL, 1);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900549
Namjae Jeon64c576f2012-12-22 12:10:27 +0900550 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900551}
552
Changman Leed6212a52013-01-29 18:30:07 +0900553static int f2fs_freeze(struct super_block *sb)
554{
555 int err;
556
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900557 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900558 return 0;
559
560 err = f2fs_sync_fs(sb, 1);
561 return err;
562}
563
564static int f2fs_unfreeze(struct super_block *sb)
565{
566 return 0;
567}
568
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900569static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
570{
571 struct super_block *sb = dentry->d_sb;
572 struct f2fs_sb_info *sbi = F2FS_SB(sb);
573 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
574 block_t total_count, user_block_count, start_count, ovp_count;
575
576 total_count = le64_to_cpu(sbi->raw_super->block_count);
577 user_block_count = sbi->user_block_count;
578 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
579 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
580 buf->f_type = F2FS_SUPER_MAGIC;
581 buf->f_bsize = sbi->blocksize;
582
583 buf->f_blocks = total_count - start_count;
584 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
585 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
586
Chao Yuc200b1a2014-08-20 18:36:46 +0800587 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
588 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900589
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900590 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900591 buf->f_fsid.val[0] = (u32)id;
592 buf->f_fsid.val[1] = (u32)(id >> 32);
593
594 return 0;
595}
596
597static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
598{
599 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
600
Gu Zhengb270ad62014-04-11 17:49:55 +0800601 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
Namjae Jeon696c0182013-06-16 09:48:48 +0900602 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900603 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900604 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900605 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
606 seq_puts(seq, ",disable_roll_forward");
607 if (test_opt(sbi, DISCARD))
608 seq_puts(seq, ",discard");
609 if (test_opt(sbi, NOHEAP))
610 seq_puts(seq, ",no_heap_alloc");
611#ifdef CONFIG_F2FS_FS_XATTR
612 if (test_opt(sbi, XATTR_USER))
613 seq_puts(seq, ",user_xattr");
614 else
615 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900616 if (test_opt(sbi, INLINE_XATTR))
617 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900618#endif
619#ifdef CONFIG_F2FS_FS_POSIX_ACL
620 if (test_opt(sbi, POSIX_ACL))
621 seq_puts(seq, ",acl");
622 else
623 seq_puts(seq, ",noacl");
624#endif
625 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100626 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800627 if (test_opt(sbi, INLINE_DATA))
628 seq_puts(seq, ",inline_data");
Wanpeng Li75342792015-03-24 10:20:27 +0800629 else
630 seq_puts(seq, ",noinline_data");
Chao Yu5efd3c62014-09-24 18:16:13 +0800631 if (test_opt(sbi, INLINE_DENTRY))
632 seq_puts(seq, ",inline_dentry");
Gu Zhengb270ad62014-04-11 17:49:55 +0800633 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900634 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700635 if (test_opt(sbi, NOBARRIER))
636 seq_puts(seq, ",nobarrier");
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700637 if (test_opt(sbi, FASTBOOT))
638 seq_puts(seq, ",fastboot");
Chao Yu89672152015-02-05 17:55:51 +0800639 if (test_opt(sbi, EXTENT_CACHE))
640 seq_puts(seq, ",extent_cache");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900641 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
642
643 return 0;
644}
645
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900646static int segment_info_seq_show(struct seq_file *seq, void *offset)
647{
648 struct super_block *sb = seq->private;
649 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600650 unsigned int total_segs =
651 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900652 int i;
653
Chao Yu90aa6dc2014-03-17 10:31:06 +0800654 seq_puts(seq, "format: segment_type|valid_blocks\n"
655 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
656
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900657 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800658 struct seg_entry *se = get_seg_entry(sbi, i);
659
660 if ((i % 10) == 0)
661 seq_printf(seq, "%-5d", i);
662 seq_printf(seq, "%d|%-3u", se->type,
663 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800664 if ((i % 10) == 9 || i == (total_segs - 1))
665 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900666 else
Gu Zheng46c04362014-03-07 18:43:33 +0800667 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900668 }
Gu Zheng46c04362014-03-07 18:43:33 +0800669
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900670 return 0;
671}
672
673static int segment_info_open_fs(struct inode *inode, struct file *file)
674{
675 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
676}
677
678static const struct file_operations f2fs_seq_segment_info_fops = {
679 .owner = THIS_MODULE,
680 .open = segment_info_open_fs,
681 .read = seq_read,
682 .llseek = seq_lseek,
683 .release = single_release,
684};
685
Yunlei He498c5e92015-05-07 18:11:37 +0800686static void default_options(struct f2fs_sb_info *sbi)
687{
688 /* init some FS parameters */
689 sbi->active_logs = NR_CURSEG_TYPE;
690
691 set_opt(sbi, BG_GC);
692 set_opt(sbi, INLINE_DATA);
693
694#ifdef CONFIG_F2FS_FS_XATTR
695 set_opt(sbi, XATTR_USER);
696#endif
697#ifdef CONFIG_F2FS_FS_POSIX_ACL
698 set_opt(sbi, POSIX_ACL);
699#endif
700}
701
Namjae Jeon696c0182013-06-16 09:48:48 +0900702static int f2fs_remount(struct super_block *sb, int *flags, char *data)
703{
704 struct f2fs_sb_info *sbi = F2FS_SB(sb);
705 struct f2fs_mount_info org_mount_opt;
706 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800707 bool need_restart_gc = false;
708 bool need_stop_gc = false;
Namjae Jeon696c0182013-06-16 09:48:48 +0900709
Theodore Ts'o02b99842014-03-13 10:14:33 -0400710 sync_filesystem(sb);
711
Namjae Jeon696c0182013-06-16 09:48:48 +0900712 /*
713 * Save the old mount options in case we
714 * need to restore them.
715 */
716 org_mount_opt = sbi->mount_opt;
717 active_logs = sbi->active_logs;
718
Chao Yu26666c82014-09-15 18:04:44 +0800719 sbi->mount_opt.opt = 0;
Yunlei He498c5e92015-05-07 18:11:37 +0800720 default_options(sbi);
Chao Yu26666c82014-09-15 18:04:44 +0800721
Namjae Jeon696c0182013-06-16 09:48:48 +0900722 /* parse mount options */
723 err = parse_options(sb, data);
724 if (err)
725 goto restore_opts;
726
727 /*
728 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +0800729 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +0900730 */
Chao Yu6b2920a2014-07-07 11:21:59 +0800731 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +0900732 goto skip;
733
734 /*
735 * We stop the GC thread if FS is mounted as RO
736 * or if background_gc = off is passed in mount
737 * option. Also sync the filesystem.
738 */
739 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
740 if (sbi->gc_thread) {
741 stop_gc_thread(sbi);
742 f2fs_sync_fs(sb, 1);
Gu Zheng876dc592014-04-11 17:50:00 +0800743 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +0900744 }
Chao Yuaba291b2014-11-18 11:17:20 +0800745 } else if (!sbi->gc_thread) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900746 err = start_gc_thread(sbi);
747 if (err)
748 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +0800749 need_stop_gc = true;
750 }
751
752 /*
753 * We stop issue flush thread if FS is mounted as RO
754 * or if flush_merge is not passed in mount option.
755 */
756 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +0800757 destroy_flush_cmd_control(sbi);
Chao Yuaba291b2014-11-18 11:17:20 +0800758 } else if (!SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +0800759 err = create_flush_cmd_control(sbi);
760 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800761 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +0900762 }
763skip:
764 /* Update the POSIXACL Flag */
765 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
766 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
767 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +0800768restore_gc:
769 if (need_restart_gc) {
770 if (start_gc_thread(sbi))
771 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +0900772 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +0800773 } else if (need_stop_gc) {
774 stop_gc_thread(sbi);
775 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900776restore_opts:
777 sbi->mount_opt = org_mount_opt;
778 sbi->active_logs = active_logs;
779 return err;
780}
781
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900782static struct super_operations f2fs_sops = {
783 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900784 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900785 .destroy_inode = f2fs_destroy_inode,
786 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900787 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900788 .show_options = f2fs_show_options,
789 .evict_inode = f2fs_evict_inode,
790 .put_super = f2fs_put_super,
791 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900792 .freeze_fs = f2fs_freeze,
793 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900794 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900795 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900796};
797
798static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
799 u64 ino, u32 generation)
800{
801 struct f2fs_sb_info *sbi = F2FS_SB(sb);
802 struct inode *inode;
803
Chao Yud6b7d4b2014-06-12 13:23:41 +0800804 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +0800805 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900806
807 /*
808 * f2fs_iget isn't quite right if the inode is currently unallocated!
809 * However f2fs_iget currently does appropriate checks to handle stale
810 * inodes so everything is OK.
811 */
812 inode = f2fs_iget(sb, ino);
813 if (IS_ERR(inode))
814 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900815 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900816 /* we didn't find the right inode.. */
817 iput(inode);
818 return ERR_PTR(-ESTALE);
819 }
820 return inode;
821}
822
823static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
824 int fh_len, int fh_type)
825{
826 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
827 f2fs_nfs_get_inode);
828}
829
830static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
831 int fh_len, int fh_type)
832{
833 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
834 f2fs_nfs_get_inode);
835}
836
837static const struct export_operations f2fs_export_ops = {
838 .fh_to_dentry = f2fs_fh_to_dentry,
839 .fh_to_parent = f2fs_fh_to_parent,
840 .get_parent = f2fs_get_parent,
841};
842
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900843static loff_t max_file_size(unsigned bits)
844{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900845 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900846 loff_t leaf_count = ADDRS_PER_BLOCK;
847
848 /* two direct node blocks */
849 result += (leaf_count * 2);
850
851 /* two indirect node blocks */
852 leaf_count *= NIDS_PER_BLOCK;
853 result += (leaf_count * 2);
854
855 /* one double indirect node block */
856 leaf_count *= NIDS_PER_BLOCK;
857 result += leaf_count;
858
859 result <<= bits;
860 return result;
861}
862
Namjae Jeona07ef782012-12-30 14:52:05 +0900863static int sanity_check_raw_super(struct super_block *sb,
864 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900865{
866 unsigned int blocksize;
867
Namjae Jeona07ef782012-12-30 14:52:05 +0900868 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
869 f2fs_msg(sb, KERN_INFO,
870 "Magic Mismatch, valid(0x%x) - read(0x%x)",
871 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900872 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900873 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900874
majianpeng5c9b4692013-02-01 19:07:57 +0800875 /* Currently, support only 4KB page cache size */
876 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
877 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800878 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800879 PAGE_CACHE_SIZE);
880 return 1;
881 }
882
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900883 /* Currently, support only 4KB block size */
884 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800885 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900886 f2fs_msg(sb, KERN_INFO,
887 "Invalid blocksize (%u), supports only 4KB\n",
888 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900889 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900890 }
majianpeng5c9b4692013-02-01 19:07:57 +0800891
Chao Yu55cf9cb2014-09-15 18:01:10 +0800892 /* Currently, support 512/1024/2048/4096 bytes sector size */
893 if (le32_to_cpu(raw_super->log_sectorsize) >
894 F2FS_MAX_LOG_SECTOR_SIZE ||
895 le32_to_cpu(raw_super->log_sectorsize) <
896 F2FS_MIN_LOG_SECTOR_SIZE) {
897 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
898 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900899 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900900 }
Chao Yu55cf9cb2014-09-15 18:01:10 +0800901 if (le32_to_cpu(raw_super->log_sectors_per_block) +
902 le32_to_cpu(raw_super->log_sectorsize) !=
903 F2FS_MAX_LOG_SECTOR_SIZE) {
904 f2fs_msg(sb, KERN_INFO,
905 "Invalid log sectors per block(%u) log sectorsize(%u)",
906 le32_to_cpu(raw_super->log_sectors_per_block),
907 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900908 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900909 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900910 return 0;
911}
912
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900913static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900914{
915 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900916 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
917 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900918
919 total = le32_to_cpu(raw_super->segment_count);
920 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
921 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
922 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
923 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
924 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
925
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900926 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900927 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900928
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -0700929 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900930 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
931 return 1;
932 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900933 return 0;
934}
935
936static void init_sb_info(struct f2fs_sb_info *sbi)
937{
938 struct f2fs_super_block *raw_super = sbi->raw_super;
939 int i;
940
941 sbi->log_sectors_per_block =
942 le32_to_cpu(raw_super->log_sectors_per_block);
943 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
944 sbi->blocksize = 1 << sbi->log_blocksize;
945 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
946 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
947 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
948 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
949 sbi->total_sections = le32_to_cpu(raw_super->section_count);
950 sbi->total_node_count =
951 (le32_to_cpu(raw_super->segment_count_nat) / 2)
952 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
953 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
954 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
955 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900956 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900957 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900958
959 for (i = 0; i < NR_COUNT_TYPE; i++)
960 atomic_set(&sbi->nr_pages[i], 0);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900961
962 sbi->dir_level = DEF_DIR_LEVEL;
Chao Yucaf00472015-01-28 17:48:42 +0800963 clear_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900964}
965
Gu Zheng9076a752013-10-14 18:47:11 +0800966/*
967 * Read f2fs raw super block.
968 * Because we have two copies of super block, so read the first one at first,
969 * if the first one is invalid, move to read the second one.
970 */
971static int read_raw_super_block(struct super_block *sb,
972 struct f2fs_super_block **raw_super,
973 struct buffer_head **raw_super_buf)
majianpeng14d7e9d2013-02-01 19:07:03 +0800974{
Gu Zheng9076a752013-10-14 18:47:11 +0800975 int block = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800976
Gu Zheng9076a752013-10-14 18:47:11 +0800977retry:
majianpeng14d7e9d2013-02-01 19:07:03 +0800978 *raw_super_buf = sb_bread(sb, block);
979 if (!*raw_super_buf) {
Gu Zheng9076a752013-10-14 18:47:11 +0800980 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
981 block + 1);
982 if (block == 0) {
983 block++;
984 goto retry;
985 } else {
986 return -EIO;
987 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800988 }
989
990 *raw_super = (struct f2fs_super_block *)
991 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
992
993 /* sanity checking of raw super */
Gu Zheng9076a752013-10-14 18:47:11 +0800994 if (sanity_check_raw_super(sb, *raw_super)) {
995 brelse(*raw_super_buf);
Chris Fries6c311ec2014-01-17 14:44:39 -0600996 f2fs_msg(sb, KERN_ERR,
997 "Can't find valid F2FS filesystem in %dth superblock",
998 block + 1);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900999 if (block == 0) {
Gu Zheng9076a752013-10-14 18:47:11 +08001000 block++;
1001 goto retry;
1002 } else {
1003 return -EINVAL;
1004 }
1005 }
majianpeng14d7e9d2013-02-01 19:07:03 +08001006
Gu Zheng9076a752013-10-14 18:47:11 +08001007 return 0;
majianpeng14d7e9d2013-02-01 19:07:03 +08001008}
1009
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001010int f2fs_commit_super(struct f2fs_sb_info *sbi)
1011{
1012 struct buffer_head *sbh = sbi->raw_super_buf;
1013 sector_t block = sbh->b_blocknr;
1014 int err;
1015
1016 /* write back-up superblock first */
1017 sbh->b_blocknr = block ? 0 : 1;
1018 mark_buffer_dirty(sbh);
1019 err = sync_dirty_buffer(sbh);
1020
1021 sbh->b_blocknr = block;
1022 if (err)
1023 goto out;
1024
1025 /* write current valid superblock */
1026 mark_buffer_dirty(sbh);
1027 err = sync_dirty_buffer(sbh);
1028out:
1029 clear_buffer_write_io_error(sbh);
1030 set_buffer_uptodate(sbh);
1031 return err;
1032}
1033
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001034static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
1035{
1036 struct f2fs_sb_info *sbi;
Gu Zheng17306632014-10-20 17:45:53 +08001037 struct f2fs_super_block *raw_super = NULL;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001038 struct buffer_head *raw_super_buf;
1039 struct inode *root;
1040 long err = -EINVAL;
Chao Yu2adc3502015-03-16 21:08:44 +08001041 bool retry = true, need_fsck = false;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001042 char *options = NULL;
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001043 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001044
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001045try_onemore:
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001046 /* allocate memory for f2fs-specific super block info */
1047 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
1048 if (!sbi)
1049 return -ENOMEM;
1050
Namjae Jeonff9234a2013-01-12 14:41:13 +09001051 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001052 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001053 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001054 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +09001055 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001056
Gu Zheng9076a752013-10-14 18:47:11 +08001057 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
1058 if (err)
1059 goto free_sbi;
1060
Gu Zheng5fb08372013-06-07 14:16:53 +08001061 sb->s_fs_info = sbi;
Yunlei He498c5e92015-05-07 18:11:37 +08001062 default_options(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001063 /* parse mount options */
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001064 options = kstrdup((const char *)data, GFP_KERNEL);
1065 if (data && !options) {
1066 err = -ENOMEM;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001067 goto free_sb_buf;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001068 }
1069
1070 err = parse_options(sb, options);
1071 if (err)
1072 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001073
Jaegeuk Kim25ca9232012-11-28 16:12:41 +09001074 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001075 sb->s_max_links = F2FS_LINK_MAX;
1076 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1077
1078 sb->s_op = &f2fs_sops;
1079 sb->s_xattr = f2fs_xattr_handlers;
1080 sb->s_export_op = &f2fs_export_ops;
1081 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001082 sb->s_time_gran = 1;
1083 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1084 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1085 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1086
1087 /* init f2fs-specific super block info */
1088 sbi->sb = sb;
1089 sbi->raw_super = raw_super;
1090 sbi->raw_super_buf = raw_super_buf;
1091 mutex_init(&sbi->gc_mutex);
Jaegeuk Kim5463e7c2015-04-21 10:40:54 -07001092 mutex_init(&sbi->writepages);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001093 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +08001094 init_rwsem(&sbi->node_write);
Chao Yucaf00472015-01-28 17:48:42 +08001095 clear_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001096 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001097
Chao Yudf0f8dc2014-03-22 14:57:23 +08001098 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001099 sbi->read_io.sbi = sbi;
1100 sbi->read_io.bio = NULL;
1101 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +08001102 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001103 sbi->write_io[i].sbi = sbi;
1104 sbi->write_io[i].bio = NULL;
1105 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001106
Gu Zhenge4795562013-09-27 18:08:30 +08001107 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +09001108 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001109 init_sb_info(sbi);
1110
1111 /* get an inode for meta space */
1112 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1113 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001114 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001115 err = PTR_ERR(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001116 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001117 }
1118
1119 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001120 if (err) {
1121 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001122 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +09001123 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001124
1125 /* sanity checking of checkpoint */
1126 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001127 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001128 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001129 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +09001130 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001131
1132 sbi->total_valid_node_count =
1133 le32_to_cpu(sbi->ckpt->valid_node_count);
1134 sbi->total_valid_inode_count =
1135 le32_to_cpu(sbi->ckpt->valid_inode_count);
1136 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1137 sbi->total_valid_block_count =
1138 le64_to_cpu(sbi->ckpt->valid_block_count);
1139 sbi->last_valid_block_count = sbi->total_valid_block_count;
1140 sbi->alloc_valid_block_count = 0;
1141 INIT_LIST_HEAD(&sbi->dir_inode_list);
1142 spin_lock_init(&sbi->dir_inode_lock);
1143
Chao Yu1dcc3362015-02-05 17:57:31 +08001144 init_extent_cache_info(sbi);
1145
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001146 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001147
1148 /* setup f2fs internal modules */
1149 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001150 if (err) {
1151 f2fs_msg(sb, KERN_ERR,
1152 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001153 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001154 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001155 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001156 if (err) {
1157 f2fs_msg(sb, KERN_ERR,
1158 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001159 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001160 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001161
1162 build_gc_manager(sbi);
1163
1164 /* get an inode for node space */
1165 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1166 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001167 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001168 err = PTR_ERR(sbi->node_inode);
1169 goto free_nm;
1170 }
1171
1172 /* if there are nt orphan nodes free them */
Chao Yu8f99a942013-11-28 15:43:43 +08001173 recover_orphan_inodes(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001174
1175 /* read root inode and dentry */
1176 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1177 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001178 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001179 err = PTR_ERR(root);
1180 goto free_node_inode;
1181 }
Chao Yu8f99a942013-11-28 15:43:43 +08001182 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001183 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001184 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001185 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001186 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001187
1188 sb->s_root = d_make_root(root); /* allocate root dentry */
1189 if (!sb->s_root) {
1190 err = -ENOMEM;
1191 goto free_root_inode;
1192 }
1193
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001194 err = f2fs_build_stats(sbi);
1195 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001196 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001197
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001198 if (f2fs_proc_root)
1199 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1200
1201 if (sbi->s_proc)
1202 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1203 &f2fs_seq_segment_info_fops, sb);
1204
Namjae Jeond3ee4562013-03-17 17:26:14 +09001205 if (test_opt(sbi, DISCARD)) {
1206 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1207 if (!blk_queue_discard(q))
1208 f2fs_msg(sb, KERN_WARNING,
1209 "mounting with \"discard\" option, but "
1210 "the device does not support discard");
1211 }
1212
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001213 sbi->s_kobj.kset = f2fs_kset;
1214 init_completion(&sbi->s_kobj_unregister);
1215 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1216 "%s", sb->s_id);
1217 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001218 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001219
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001220 /* recover fsynced data */
1221 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
Jaegeuk Kim081d78c2015-01-23 19:16:59 -08001222 /*
1223 * mount should be failed, when device has readonly mode, and
1224 * previous checkpoint was not done by clean system shutdown.
1225 */
1226 if (bdev_read_only(sb->s_bdev) &&
1227 !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) {
1228 err = -EROFS;
1229 goto free_kobj;
1230 }
Chao Yu2adc3502015-03-16 21:08:44 +08001231
1232 if (need_fsck)
1233 set_sbi_flag(sbi, SBI_NEED_FSCK);
1234
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001235 err = recover_fsync_data(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001236 if (err) {
Chao Yu2adc3502015-03-16 21:08:44 +08001237 need_fsck = true;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001238 f2fs_msg(sb, KERN_ERR,
1239 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001240 goto free_kobj;
1241 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001242 }
1243
1244 /*
1245 * If filesystem is not mounted as read-only then
1246 * do start the gc_thread.
1247 */
Chao Yu6c029932014-11-18 11:16:01 +08001248 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001249 /* After POR, we can run background GC thread.*/
1250 err = start_gc_thread(sbi);
1251 if (err)
1252 goto free_kobj;
1253 }
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001254 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001255 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001256
1257free_kobj:
1258 kobject_del(&sbi->s_kobj);
1259free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001260 if (sbi->s_proc) {
1261 remove_proc_entry("segment_info", sbi->s_proc);
1262 remove_proc_entry(sb->s_id, f2fs_proc_root);
1263 }
1264 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001265free_root_inode:
1266 dput(sb->s_root);
1267 sb->s_root = NULL;
1268free_node_inode:
1269 iput(sbi->node_inode);
1270free_nm:
1271 destroy_node_manager(sbi);
1272free_sm:
1273 destroy_segment_manager(sbi);
1274free_cp:
1275 kfree(sbi->ckpt);
1276free_meta_inode:
1277 make_bad_inode(sbi->meta_inode);
1278 iput(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001279free_options:
1280 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001281free_sb_buf:
1282 brelse(raw_super_buf);
1283free_sbi:
1284 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001285
1286 /* give only one another chance */
1287 if (retry) {
Taehee Yoo9df47ba2015-04-13 21:48:06 +09001288 retry = false;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001289 shrink_dcache_sb(sb);
1290 goto try_onemore;
1291 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001292 return err;
1293}
1294
1295static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1296 const char *dev_name, void *data)
1297{
1298 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1299}
1300
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001301static void kill_f2fs_super(struct super_block *sb)
1302{
1303 if (sb->s_root)
Chao Yucaf00472015-01-28 17:48:42 +08001304 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001305 kill_block_super(sb);
1306}
1307
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001308static struct file_system_type f2fs_fs_type = {
1309 .owner = THIS_MODULE,
1310 .name = "f2fs",
1311 .mount = f2fs_mount,
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001312 .kill_sb = kill_f2fs_super,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001313 .fs_flags = FS_REQUIRES_DEV,
1314};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001315MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001316
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001317static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001318{
1319 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
Gu Zhenge8512d22014-03-07 18:43:28 +08001320 sizeof(struct f2fs_inode_info));
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001321 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001322 return -ENOMEM;
1323 return 0;
1324}
1325
1326static void destroy_inodecache(void)
1327{
1328 /*
1329 * Make sure all delayed rcu free inodes are flushed before we
1330 * destroy cache.
1331 */
1332 rcu_barrier();
1333 kmem_cache_destroy(f2fs_inode_cachep);
1334}
1335
1336static int __init init_f2fs_fs(void)
1337{
1338 int err;
1339
Jaegeuk Kimc0508652015-01-07 14:07:36 -08001340 f2fs_build_trace_ios();
1341
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001342 err = init_inodecache();
1343 if (err)
1344 goto fail;
1345 err = create_node_manager_caches();
1346 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001347 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001348 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001349 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001350 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001351 err = create_checkpoint_caches();
1352 if (err)
Chao Yu06292072014-12-29 15:56:18 +08001353 goto free_segment_manager_caches;
Chao Yu1dcc3362015-02-05 17:57:31 +08001354 err = create_extent_cache();
1355 if (err)
1356 goto free_checkpoint_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001357 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001358 if (!f2fs_kset) {
1359 err = -ENOMEM;
Chao Yu1dcc3362015-02-05 17:57:31 +08001360 goto free_extent_cache;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001361 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001362 err = register_filesystem(&f2fs_fs_type);
1363 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001364 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001365 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001366 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001367 return 0;
1368
1369free_kset:
1370 kset_unregister(f2fs_kset);
Chao Yu1dcc3362015-02-05 17:57:31 +08001371free_extent_cache:
1372 destroy_extent_cache();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001373free_checkpoint_caches:
1374 destroy_checkpoint_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001375free_segment_manager_caches:
1376 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001377free_node_manager_caches:
1378 destroy_node_manager_caches();
1379free_inodecache:
1380 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001381fail:
1382 return err;
1383}
1384
1385static void __exit exit_f2fs_fs(void)
1386{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001387 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001388 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001389 unregister_filesystem(&f2fs_fs_type);
Wanpeng Lifdf6c8b2015-03-06 15:00:54 +08001390 destroy_extent_cache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001391 destroy_checkpoint_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001392 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001393 destroy_node_manager_caches();
1394 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001395 kset_unregister(f2fs_kset);
Jaegeuk Kim351f4fb2015-01-07 14:09:48 -08001396 f2fs_destroy_trace_ios();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001397}
1398
1399module_init(init_f2fs_fs)
1400module_exit(exit_f2fs_fs)
1401
1402MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1403MODULE_DESCRIPTION("Flash Friendly File System");
1404MODULE_LICENSE("GPL");