blob: 006f87d69921da05e071f41dc023a5d812116779 [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
Jaegeuk Kim2658e502015-06-19 12:01:21 -070042/* f2fs-wide shrinker description */
43static struct shrinker f2fs_shrinker_info = {
44 .scan_objects = f2fs_shrink_scan,
45 .count_objects = f2fs_shrink_count,
46 .seeks = DEFAULT_SEEKS,
47};
48
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090049enum {
Namjae Jeon696c0182013-06-16 09:48:48 +090050 Opt_gc_background,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090051 Opt_disable_roll_forward,
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -080052 Opt_norecovery,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090053 Opt_discard,
54 Opt_noheap,
Kelly Anderson4058c512013-10-07 11:36:20 +090055 Opt_user_xattr,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090056 Opt_nouser_xattr,
Kelly Anderson4058c512013-10-07 11:36:20 +090057 Opt_acl,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090058 Opt_noacl,
59 Opt_active_logs,
60 Opt_disable_ext_identify,
Jaegeuk Kim444c5802013-08-08 15:16:22 +090061 Opt_inline_xattr,
Huajun Li8274de72013-11-10 23:13:17 +080062 Opt_inline_data,
Chao Yu5efd3c62014-09-24 18:16:13 +080063 Opt_inline_dentry,
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090064 Opt_flush_merge,
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070065 Opt_nobarrier,
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070066 Opt_fastboot,
Chao Yu89672152015-02-05 17:55:51 +080067 Opt_extent_cache,
Jaegeuk Kim7daaea22015-06-25 17:43:04 -070068 Opt_noextent_cache,
Wanpeng Li75342792015-03-24 10:20:27 +080069 Opt_noinline_data,
Chao Yu343f40f2015-12-16 13:12:16 +080070 Opt_data_flush,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090071 Opt_err,
72};
73
74static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090075 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090076 {Opt_disable_roll_forward, "disable_roll_forward"},
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -080077 {Opt_norecovery, "norecovery"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090078 {Opt_discard, "discard"},
79 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +090080 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090081 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +090082 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090083 {Opt_noacl, "noacl"},
84 {Opt_active_logs, "active_logs=%u"},
85 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +090086 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +080087 {Opt_inline_data, "inline_data"},
Chao Yu5efd3c62014-09-24 18:16:13 +080088 {Opt_inline_dentry, "inline_dentry"},
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090089 {Opt_flush_merge, "flush_merge"},
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070090 {Opt_nobarrier, "nobarrier"},
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070091 {Opt_fastboot, "fastboot"},
Chao Yu89672152015-02-05 17:55:51 +080092 {Opt_extent_cache, "extent_cache"},
Jaegeuk Kim7daaea22015-06-25 17:43:04 -070093 {Opt_noextent_cache, "noextent_cache"},
Wanpeng Li75342792015-03-24 10:20:27 +080094 {Opt_noinline_data, "noinline_data"},
Chao Yu343f40f2015-12-16 13:12:16 +080095 {Opt_data_flush, "data_flush"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090096 {Opt_err, NULL},
97};
98
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090099/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900100enum {
101 GC_THREAD, /* struct f2fs_gc_thread */
102 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900103 NM_INFO, /* struct f2fs_nm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900104 F2FS_SBI, /* struct f2fs_sb_info */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900105};
106
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900107struct f2fs_attr {
108 struct attribute attr;
109 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
110 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
111 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900112 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900113 int offset;
114};
115
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900116static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
117{
118 if (struct_type == GC_THREAD)
119 return (unsigned char *)sbi->gc_thread;
120 else if (struct_type == SM_INFO)
121 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900122 else if (struct_type == NM_INFO)
123 return (unsigned char *)NM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900124 else if (struct_type == F2FS_SBI)
125 return (unsigned char *)sbi;
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900126 return NULL;
127}
128
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800129static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
130 struct f2fs_sb_info *sbi, char *buf)
131{
132 struct super_block *sb = sbi->sb;
133
134 if (!sb->s_bdev->bd_part)
135 return snprintf(buf, PAGE_SIZE, "0\n");
136
137 return snprintf(buf, PAGE_SIZE, "%llu\n",
138 (unsigned long long)(sbi->kbytes_written +
139 BD_PART_WRITTEN(sbi)));
140}
141
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900142static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
143 struct f2fs_sb_info *sbi, char *buf)
144{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900145 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900146 unsigned int *ui;
147
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900148 ptr = __struct_ptr(sbi, a->struct_type);
149 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900150 return -EINVAL;
151
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900152 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900153
154 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
155}
156
157static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
158 struct f2fs_sb_info *sbi,
159 const char *buf, size_t count)
160{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900161 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900162 unsigned long t;
163 unsigned int *ui;
164 ssize_t ret;
165
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900166 ptr = __struct_ptr(sbi, a->struct_type);
167 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900168 return -EINVAL;
169
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900170 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900171
172 ret = kstrtoul(skip_spaces(buf), 0, &t);
173 if (ret < 0)
174 return ret;
175 *ui = t;
176 return count;
177}
178
179static ssize_t f2fs_attr_show(struct kobject *kobj,
180 struct attribute *attr, char *buf)
181{
182 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
183 s_kobj);
184 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
185
186 return a->show ? a->show(a, sbi, buf) : 0;
187}
188
189static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
190 const char *buf, size_t len)
191{
192 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
193 s_kobj);
194 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
195
196 return a->store ? a->store(a, sbi, buf, len) : 0;
197}
198
199static void f2fs_sb_release(struct kobject *kobj)
200{
201 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
202 s_kobj);
203 complete(&sbi->s_kobj_unregister);
204}
205
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900206#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900207static struct f2fs_attr f2fs_attr_##_name = { \
208 .attr = {.name = __stringify(_name), .mode = _mode }, \
209 .show = _show, \
210 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900211 .struct_type = _struct_type, \
212 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900213}
214
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900215#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
216 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
217 f2fs_sbi_show, f2fs_sbi_store, \
218 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900219
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800220#define F2FS_GENERAL_RO_ATTR(name) \
221static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
222
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900223F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
224F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
225F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
226F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
227F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900228F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800229F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900230F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
231F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700232F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900233F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
Chao Yuea1a29a02015-10-12 17:08:48 +0800234F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
Chao Yu2304cb02016-01-18 18:32:58 +0800235F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900236F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900237F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
Jaegeuk Kim6beceb52016-01-08 15:51:50 -0800238F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800239F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800240F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900241
242#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
243static struct attribute *f2fs_attrs[] = {
244 ATTR_LIST(gc_min_sleep_time),
245 ATTR_LIST(gc_max_sleep_time),
246 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900247 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900248 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900249 ATTR_LIST(max_small_discards),
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800250 ATTR_LIST(batched_trim_sections),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900251 ATTR_LIST(ipu_policy),
252 ATTR_LIST(min_ipu_util),
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700253 ATTR_LIST(min_fsync_blocks),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900254 ATTR_LIST(max_victim_search),
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900255 ATTR_LIST(dir_level),
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900256 ATTR_LIST(ram_thresh),
Chao Yuea1a29a02015-10-12 17:08:48 +0800257 ATTR_LIST(ra_nid_pages),
Chao Yu2304cb02016-01-18 18:32:58 +0800258 ATTR_LIST(dirty_nats_ratio),
Jaegeuk Kim60b99b42015-10-05 14:49:57 -0700259 ATTR_LIST(cp_interval),
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800260 ATTR_LIST(idle_interval),
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800261 ATTR_LIST(lifetime_write_kbytes),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900262 NULL,
263};
264
265static const struct sysfs_ops f2fs_attr_ops = {
266 .show = f2fs_attr_show,
267 .store = f2fs_attr_store,
268};
269
270static struct kobj_type f2fs_ktype = {
271 .default_attrs = f2fs_attrs,
272 .sysfs_ops = &f2fs_attr_ops,
273 .release = f2fs_sb_release,
274};
275
Namjae Jeona07ef782012-12-30 14:52:05 +0900276void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
277{
278 struct va_format vaf;
279 va_list args;
280
281 va_start(args, fmt);
282 vaf.fmt = fmt;
283 vaf.va = &args;
284 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
285 va_end(args);
286}
287
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900288static void init_once(void *foo)
289{
290 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
291
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900292 inode_init_once(&fi->vfs_inode);
293}
294
Namjae Jeon696c0182013-06-16 09:48:48 +0900295static int parse_options(struct super_block *sb, char *options)
296{
297 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chao Yu09d54cd2015-06-08 13:20:10 +0800298 struct request_queue *q;
Namjae Jeon696c0182013-06-16 09:48:48 +0900299 substring_t args[MAX_OPT_ARGS];
300 char *p, *name;
301 int arg = 0;
302
303 if (!options)
304 return 0;
305
306 while ((p = strsep(&options, ",")) != NULL) {
307 int token;
308 if (!*p)
309 continue;
310 /*
311 * Initialize args struct so we know whether arg was
312 * found; some options take optional arguments.
313 */
314 args[0].to = args[0].from = NULL;
315 token = match_token(p, f2fs_tokens, args);
316
317 switch (token) {
318 case Opt_gc_background:
319 name = match_strdup(&args[0]);
320
321 if (!name)
322 return -ENOMEM;
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700323 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900324 set_opt(sbi, BG_GC);
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700325 clear_opt(sbi, FORCE_FG_GC);
326 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900327 clear_opt(sbi, BG_GC);
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700328 clear_opt(sbi, FORCE_FG_GC);
329 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
330 set_opt(sbi, BG_GC);
331 set_opt(sbi, FORCE_FG_GC);
332 } else {
Namjae Jeon696c0182013-06-16 09:48:48 +0900333 kfree(name);
334 return -EINVAL;
335 }
336 kfree(name);
337 break;
338 case Opt_disable_roll_forward:
339 set_opt(sbi, DISABLE_ROLL_FORWARD);
340 break;
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -0800341 case Opt_norecovery:
342 /* this option mounts f2fs with ro */
343 set_opt(sbi, DISABLE_ROLL_FORWARD);
344 if (!f2fs_readonly(sb))
345 return -EINVAL;
346 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900347 case Opt_discard:
Chao Yu09d54cd2015-06-08 13:20:10 +0800348 q = bdev_get_queue(sb->s_bdev);
349 if (blk_queue_discard(q)) {
350 set_opt(sbi, DISCARD);
351 } else {
352 f2fs_msg(sb, KERN_WARNING,
353 "mounting with \"discard\" option, but "
354 "the device does not support discard");
355 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900356 break;
357 case Opt_noheap:
358 set_opt(sbi, NOHEAP);
359 break;
360#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900361 case Opt_user_xattr:
362 set_opt(sbi, XATTR_USER);
363 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900364 case Opt_nouser_xattr:
365 clear_opt(sbi, XATTR_USER);
366 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900367 case Opt_inline_xattr:
368 set_opt(sbi, INLINE_XATTR);
369 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900370#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900371 case Opt_user_xattr:
372 f2fs_msg(sb, KERN_INFO,
373 "user_xattr options not supported");
374 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900375 case Opt_nouser_xattr:
376 f2fs_msg(sb, KERN_INFO,
377 "nouser_xattr options not supported");
378 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900379 case Opt_inline_xattr:
380 f2fs_msg(sb, KERN_INFO,
381 "inline_xattr options not supported");
382 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900383#endif
384#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900385 case Opt_acl:
386 set_opt(sbi, POSIX_ACL);
387 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900388 case Opt_noacl:
389 clear_opt(sbi, POSIX_ACL);
390 break;
391#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900392 case Opt_acl:
393 f2fs_msg(sb, KERN_INFO, "acl options not supported");
394 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900395 case Opt_noacl:
396 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
397 break;
398#endif
399 case Opt_active_logs:
400 if (args->from && match_int(args, &arg))
401 return -EINVAL;
402 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
403 return -EINVAL;
404 sbi->active_logs = arg;
405 break;
406 case Opt_disable_ext_identify:
407 set_opt(sbi, DISABLE_EXT_IDENTIFY);
408 break;
Huajun Li8274de72013-11-10 23:13:17 +0800409 case Opt_inline_data:
410 set_opt(sbi, INLINE_DATA);
411 break;
Chao Yu5efd3c62014-09-24 18:16:13 +0800412 case Opt_inline_dentry:
413 set_opt(sbi, INLINE_DENTRY);
414 break;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900415 case Opt_flush_merge:
416 set_opt(sbi, FLUSH_MERGE);
417 break;
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700418 case Opt_nobarrier:
419 set_opt(sbi, NOBARRIER);
420 break;
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700421 case Opt_fastboot:
422 set_opt(sbi, FASTBOOT);
423 break;
Chao Yu89672152015-02-05 17:55:51 +0800424 case Opt_extent_cache:
425 set_opt(sbi, EXTENT_CACHE);
426 break;
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700427 case Opt_noextent_cache:
428 clear_opt(sbi, EXTENT_CACHE);
429 break;
Wanpeng Li75342792015-03-24 10:20:27 +0800430 case Opt_noinline_data:
431 clear_opt(sbi, INLINE_DATA);
432 break;
Chao Yu343f40f2015-12-16 13:12:16 +0800433 case Opt_data_flush:
434 set_opt(sbi, DATA_FLUSH);
435 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900436 default:
437 f2fs_msg(sb, KERN_ERR,
438 "Unrecognized mount option \"%s\" or missing value",
439 p);
440 return -EINVAL;
441 }
442 }
443 return 0;
444}
445
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900446static struct inode *f2fs_alloc_inode(struct super_block *sb)
447{
448 struct f2fs_inode_info *fi;
449
Chao Yua0acdfe2013-12-05 09:54:00 +0800450 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900451 if (!fi)
452 return NULL;
453
454 init_once((void *) fi);
455
Masanari Iida434720f2013-03-19 08:03:35 +0900456 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900457 fi->vfs_inode.i_version = 1;
Jaegeuk Kima7ffdbe2014-09-12 15:53:45 -0700458 atomic_set(&fi->dirty_pages, 0);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900459 fi->i_current_depth = 1;
460 fi->i_advise = 0;
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900461 init_rwsem(&fi->i_sem);
Chao Yu2710fd72015-12-15 13:30:45 +0800462 INIT_LIST_HEAD(&fi->dirty_list);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700463 INIT_LIST_HEAD(&fi->inmem_pages);
464 mutex_init(&fi->inmem_lock);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900465
466 set_inode_flag(fi, FI_NEW_INODE);
467
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900468 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
469 set_inode_flag(fi, FI_INLINE_XATTR);
470
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900471 /* Will be used by directory only */
472 fi->i_dir_level = F2FS_SB(sb)->dir_level;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900473 return &fi->vfs_inode;
474}
475
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900476static int f2fs_drop_inode(struct inode *inode)
477{
478 /*
479 * This is to avoid a deadlock condition like below.
480 * writeback_single_inode(inode)
481 * - f2fs_write_data_page
482 * - f2fs_gc -> iput -> evict
483 * - inode_wait_for_writeback(inode)
484 */
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700485 if (!inode_unhashed(inode) && inode->i_state & I_SYNC) {
486 if (!inode->i_nlink && !is_bad_inode(inode)) {
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700487 /* to avoid evict_inode call simultaneously */
488 atomic_inc(&inode->i_count);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700489 spin_unlock(&inode->i_lock);
490
491 /* some remained atomic pages should discarded */
492 if (f2fs_is_atomic_file(inode))
Chao Yu29b96b52016-02-06 14:38:29 +0800493 drop_inmem_pages(inode);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700494
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700495 /* should remain fi->extent_tree for writepage */
496 f2fs_destroy_extent_node(inode);
497
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700498 sb_start_intwrite(inode->i_sb);
499 i_size_write(inode, 0);
500
501 if (F2FS_HAS_BLOCKS(inode))
Chao Yu55f57d22015-07-16 18:19:02 +0800502 f2fs_truncate(inode, true);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700503
504 sb_end_intwrite(inode->i_sb);
505
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700506 fscrypt_put_encryption_info(inode, NULL);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700507 spin_lock(&inode->i_lock);
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700508 atomic_dec(&inode->i_count);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700509 }
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900510 return 0;
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700511 }
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900512 return generic_drop_inode(inode);
513}
514
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900515/*
516 * f2fs_dirty_inode() is called from __mark_inode_dirty()
517 *
518 * We should call set_dirty_inode to write the dirty inode through write_inode.
519 */
520static void f2fs_dirty_inode(struct inode *inode, int flags)
521{
522 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900523}
524
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900525static void f2fs_i_callback(struct rcu_head *head)
526{
527 struct inode *inode = container_of(head, struct inode, i_rcu);
528 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
529}
530
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900531static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900532{
533 call_rcu(&inode->i_rcu, f2fs_i_callback);
534}
535
536static void f2fs_put_super(struct super_block *sb)
537{
538 struct f2fs_sb_info *sbi = F2FS_SB(sb);
539
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900540 if (sbi->s_proc) {
541 remove_proc_entry("segment_info", sbi->s_proc);
542 remove_proc_entry(sb->s_id, f2fs_proc_root);
543 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900544 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900545
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900546 stop_gc_thread(sbi);
547
Jaegeuk Kim2658e502015-06-19 12:01:21 -0700548 /* prevent remaining shrinker jobs */
549 mutex_lock(&sbi->umount_mutex);
550
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800551 /*
552 * We don't need to do checkpoint when superblock is clean.
553 * But, the previous checkpoint was not done by umount, it needs to do
554 * clean checkpoint again.
555 */
Chao Yucaf00472015-01-28 17:48:42 +0800556 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800557 !is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) {
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700558 struct cp_control cpc = {
559 .reason = CP_UMOUNT,
560 };
561 write_checkpoint(sbi, &cpc);
562 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900563
Jaegeuk Kimeca616f2015-06-15 14:52:29 -0700564 /* write_checkpoint can update stat informaion */
565 f2fs_destroy_stats(sbi);
566
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700567 /*
568 * normally superblock is clean, so we need to release this.
569 * In addition, EIO will skip do checkpoint, we need this as well.
570 */
Chao Yua49324f2015-12-15 13:29:47 +0800571 release_ino_entry(sbi);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700572 release_discard_addrs(sbi);
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700573
Jaegeuk Kim2658e502015-06-19 12:01:21 -0700574 f2fs_leave_shrinker(sbi);
575 mutex_unlock(&sbi->umount_mutex);
576
Jaegeuk Kim17c19122016-01-29 08:57:59 -0800577 /* our cp_error case, we can wait for any writeback page */
Chao Yu406657d2016-02-24 17:17:55 +0800578 if (get_pages(sbi, F2FS_WRITEBACK))
579 f2fs_flush_merged_bios(sbi);
Jaegeuk Kim17c19122016-01-29 08:57:59 -0800580
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900581 iput(sbi->node_inode);
582 iput(sbi->meta_inode);
583
584 /* destroy f2fs internal modules */
585 destroy_node_manager(sbi);
586 destroy_segment_manager(sbi);
587
588 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900589 kobject_put(&sbi->s_kobj);
590 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900591
592 sb->s_fs_info = NULL;
Keith Mok43b65732016-03-02 12:04:24 -0800593 if (sbi->s_chksum_driver)
594 crypto_free_shash(sbi->s_chksum_driver);
Yunlei Heb39f0de2015-12-15 17:17:20 +0800595 kfree(sbi->raw_super);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900596 kfree(sbi);
597}
598
599int f2fs_sync_fs(struct super_block *sb, int sync)
600{
601 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chao Yuc34f42e2015-12-23 17:50:30 +0800602 int err = 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900603
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900604 trace_f2fs_sync_fs(sb, sync);
605
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900606 if (sync) {
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700607 struct cp_control cpc;
608
Jaegeuk Kim119ee912015-01-29 11:45:33 -0800609 cpc.reason = __get_cp_reason(sbi);
610
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900611 mutex_lock(&sbi->gc_mutex);
Chao Yuc34f42e2015-12-23 17:50:30 +0800612 err = write_checkpoint(sbi, &cpc);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900613 mutex_unlock(&sbi->gc_mutex);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900614 }
Jaegeuk Kim05ca3632015-04-23 14:38:15 -0700615 f2fs_trace_ios(NULL, 1);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900616
Chao Yuc34f42e2015-12-23 17:50:30 +0800617 return err;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900618}
619
Changman Leed6212a52013-01-29 18:30:07 +0900620static int f2fs_freeze(struct super_block *sb)
621{
622 int err;
623
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900624 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900625 return 0;
626
627 err = f2fs_sync_fs(sb, 1);
628 return err;
629}
630
631static int f2fs_unfreeze(struct super_block *sb)
632{
633 return 0;
634}
635
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900636static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
637{
638 struct super_block *sb = dentry->d_sb;
639 struct f2fs_sb_info *sbi = F2FS_SB(sb);
640 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
641 block_t total_count, user_block_count, start_count, ovp_count;
642
643 total_count = le64_to_cpu(sbi->raw_super->block_count);
644 user_block_count = sbi->user_block_count;
645 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
646 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
647 buf->f_type = F2FS_SUPER_MAGIC;
648 buf->f_bsize = sbi->blocksize;
649
650 buf->f_blocks = total_count - start_count;
651 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
652 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
653
Chao Yuc200b1a2014-08-20 18:36:46 +0800654 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
655 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900656
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900657 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900658 buf->f_fsid.val[0] = (u32)id;
659 buf->f_fsid.val[1] = (u32)(id >> 32);
660
661 return 0;
662}
663
664static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
665{
666 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
667
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700668 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
669 if (test_opt(sbi, FORCE_FG_GC))
670 seq_printf(seq, ",background_gc=%s", "sync");
671 else
672 seq_printf(seq, ",background_gc=%s", "on");
673 } else {
Namjae Jeon696c0182013-06-16 09:48:48 +0900674 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700675 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900676 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
677 seq_puts(seq, ",disable_roll_forward");
678 if (test_opt(sbi, DISCARD))
679 seq_puts(seq, ",discard");
680 if (test_opt(sbi, NOHEAP))
681 seq_puts(seq, ",no_heap_alloc");
682#ifdef CONFIG_F2FS_FS_XATTR
683 if (test_opt(sbi, XATTR_USER))
684 seq_puts(seq, ",user_xattr");
685 else
686 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900687 if (test_opt(sbi, INLINE_XATTR))
688 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900689#endif
690#ifdef CONFIG_F2FS_FS_POSIX_ACL
691 if (test_opt(sbi, POSIX_ACL))
692 seq_puts(seq, ",acl");
693 else
694 seq_puts(seq, ",noacl");
695#endif
696 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100697 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800698 if (test_opt(sbi, INLINE_DATA))
699 seq_puts(seq, ",inline_data");
Wanpeng Li75342792015-03-24 10:20:27 +0800700 else
701 seq_puts(seq, ",noinline_data");
Chao Yu5efd3c62014-09-24 18:16:13 +0800702 if (test_opt(sbi, INLINE_DENTRY))
703 seq_puts(seq, ",inline_dentry");
Gu Zhengb270ad62014-04-11 17:49:55 +0800704 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900705 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700706 if (test_opt(sbi, NOBARRIER))
707 seq_puts(seq, ",nobarrier");
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700708 if (test_opt(sbi, FASTBOOT))
709 seq_puts(seq, ",fastboot");
Chao Yu89672152015-02-05 17:55:51 +0800710 if (test_opt(sbi, EXTENT_CACHE))
711 seq_puts(seq, ",extent_cache");
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700712 else
713 seq_puts(seq, ",noextent_cache");
Chao Yu343f40f2015-12-16 13:12:16 +0800714 if (test_opt(sbi, DATA_FLUSH))
715 seq_puts(seq, ",data_flush");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900716 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
717
718 return 0;
719}
720
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900721static int segment_info_seq_show(struct seq_file *seq, void *offset)
722{
723 struct super_block *sb = seq->private;
724 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600725 unsigned int total_segs =
726 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900727 int i;
728
Chao Yu90aa6dc2014-03-17 10:31:06 +0800729 seq_puts(seq, "format: segment_type|valid_blocks\n"
730 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
731
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900732 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800733 struct seg_entry *se = get_seg_entry(sbi, i);
734
735 if ((i % 10) == 0)
Yunlei He01a5ad82015-08-31 17:15:10 +0800736 seq_printf(seq, "%-10d", i);
Chao Yu90aa6dc2014-03-17 10:31:06 +0800737 seq_printf(seq, "%d|%-3u", se->type,
738 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800739 if ((i % 10) == 9 || i == (total_segs - 1))
740 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900741 else
Gu Zheng46c04362014-03-07 18:43:33 +0800742 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900743 }
Gu Zheng46c04362014-03-07 18:43:33 +0800744
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900745 return 0;
746}
747
748static int segment_info_open_fs(struct inode *inode, struct file *file)
749{
750 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
751}
752
753static const struct file_operations f2fs_seq_segment_info_fops = {
754 .owner = THIS_MODULE,
755 .open = segment_info_open_fs,
756 .read = seq_read,
757 .llseek = seq_lseek,
758 .release = single_release,
759};
760
Yunlei He498c5e92015-05-07 18:11:37 +0800761static void default_options(struct f2fs_sb_info *sbi)
762{
763 /* init some FS parameters */
764 sbi->active_logs = NR_CURSEG_TYPE;
765
766 set_opt(sbi, BG_GC);
767 set_opt(sbi, INLINE_DATA);
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700768 set_opt(sbi, EXTENT_CACHE);
Yunlei He498c5e92015-05-07 18:11:37 +0800769
770#ifdef CONFIG_F2FS_FS_XATTR
771 set_opt(sbi, XATTR_USER);
772#endif
773#ifdef CONFIG_F2FS_FS_POSIX_ACL
774 set_opt(sbi, POSIX_ACL);
775#endif
776}
777
Namjae Jeon696c0182013-06-16 09:48:48 +0900778static int f2fs_remount(struct super_block *sb, int *flags, char *data)
779{
780 struct f2fs_sb_info *sbi = F2FS_SB(sb);
781 struct f2fs_mount_info org_mount_opt;
782 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800783 bool need_restart_gc = false;
784 bool need_stop_gc = false;
Chao Yu9cd81ce2015-09-18 16:55:26 +0800785 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
Namjae Jeon696c0182013-06-16 09:48:48 +0900786
787 /*
788 * Save the old mount options in case we
789 * need to restore them.
790 */
791 org_mount_opt = sbi->mount_opt;
792 active_logs = sbi->active_logs;
793
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800794 if (*flags & MS_RDONLY) {
795 set_opt(sbi, FASTBOOT);
796 set_sbi_flag(sbi, SBI_IS_DIRTY);
797 }
798
799 sync_filesystem(sb);
800
Chao Yu26666c82014-09-15 18:04:44 +0800801 sbi->mount_opt.opt = 0;
Yunlei He498c5e92015-05-07 18:11:37 +0800802 default_options(sbi);
Chao Yu26666c82014-09-15 18:04:44 +0800803
Namjae Jeon696c0182013-06-16 09:48:48 +0900804 /* parse mount options */
805 err = parse_options(sb, data);
806 if (err)
807 goto restore_opts;
808
809 /*
810 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +0800811 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +0900812 */
Chao Yu6b2920a2014-07-07 11:21:59 +0800813 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +0900814 goto skip;
815
Chao Yu9cd81ce2015-09-18 16:55:26 +0800816 /* disallow enable/disable extent_cache dynamically */
817 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
818 err = -EINVAL;
819 f2fs_msg(sbi->sb, KERN_WARNING,
820 "switch extent_cache option is not allowed");
821 goto restore_opts;
822 }
823
Namjae Jeon696c0182013-06-16 09:48:48 +0900824 /*
825 * We stop the GC thread if FS is mounted as RO
826 * or if background_gc = off is passed in mount
827 * option. Also sync the filesystem.
828 */
829 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
830 if (sbi->gc_thread) {
831 stop_gc_thread(sbi);
832 f2fs_sync_fs(sb, 1);
Gu Zheng876dc592014-04-11 17:50:00 +0800833 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +0900834 }
Chao Yuaba291b2014-11-18 11:17:20 +0800835 } else if (!sbi->gc_thread) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900836 err = start_gc_thread(sbi);
837 if (err)
838 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +0800839 need_stop_gc = true;
840 }
841
842 /*
843 * We stop issue flush thread if FS is mounted as RO
844 * or if flush_merge is not passed in mount option.
845 */
846 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +0800847 destroy_flush_cmd_control(sbi);
Chao Yuaba291b2014-11-18 11:17:20 +0800848 } else if (!SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +0800849 err = create_flush_cmd_control(sbi);
850 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800851 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +0900852 }
853skip:
854 /* Update the POSIXACL Flag */
855 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
856 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
857 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +0800858restore_gc:
859 if (need_restart_gc) {
860 if (start_gc_thread(sbi))
861 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +0900862 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +0800863 } else if (need_stop_gc) {
864 stop_gc_thread(sbi);
865 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900866restore_opts:
867 sbi->mount_opt = org_mount_opt;
868 sbi->active_logs = active_logs;
869 return err;
870}
871
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900872static struct super_operations f2fs_sops = {
873 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900874 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900875 .destroy_inode = f2fs_destroy_inode,
876 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900877 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900878 .show_options = f2fs_show_options,
879 .evict_inode = f2fs_evict_inode,
880 .put_super = f2fs_put_super,
881 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900882 .freeze_fs = f2fs_freeze,
883 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900884 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900885 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900886};
887
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700888#ifdef CONFIG_F2FS_FS_ENCRYPTION
889static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
890{
891 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
892 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
893 ctx, len, NULL);
894}
895
896static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
897 void *fs_data)
898{
899 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
900 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
901 ctx, len, fs_data, XATTR_CREATE);
902}
903
904static unsigned f2fs_max_namelen(struct inode *inode)
905{
906 return S_ISLNK(inode->i_mode) ?
907 inode->i_sb->s_blocksize : F2FS_NAME_LEN;
908}
909
910static struct fscrypt_operations f2fs_cryptops = {
911 .get_context = f2fs_get_context,
912 .set_context = f2fs_set_context,
913 .is_encrypted = f2fs_encrypted_inode,
914 .empty_dir = f2fs_empty_dir,
915 .max_namelen = f2fs_max_namelen,
916};
917#else
918static struct fscrypt_operations f2fs_cryptops = {
919 .is_encrypted = f2fs_encrypted_inode,
920};
921#endif
922
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900923static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
924 u64 ino, u32 generation)
925{
926 struct f2fs_sb_info *sbi = F2FS_SB(sb);
927 struct inode *inode;
928
Chao Yud6b7d4b2014-06-12 13:23:41 +0800929 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +0800930 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900931
932 /*
933 * f2fs_iget isn't quite right if the inode is currently unallocated!
934 * However f2fs_iget currently does appropriate checks to handle stale
935 * inodes so everything is OK.
936 */
937 inode = f2fs_iget(sb, ino);
938 if (IS_ERR(inode))
939 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900940 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900941 /* we didn't find the right inode.. */
942 iput(inode);
943 return ERR_PTR(-ESTALE);
944 }
945 return inode;
946}
947
948static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
949 int fh_len, int fh_type)
950{
951 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
952 f2fs_nfs_get_inode);
953}
954
955static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
956 int fh_len, int fh_type)
957{
958 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
959 f2fs_nfs_get_inode);
960}
961
962static const struct export_operations f2fs_export_ops = {
963 .fh_to_dentry = f2fs_fh_to_dentry,
964 .fh_to_parent = f2fs_fh_to_parent,
965 .get_parent = f2fs_get_parent,
966};
967
Chao Yue0afc4d2015-12-31 14:35:37 +0800968static loff_t max_file_blocks(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900969{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900970 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900971 loff_t leaf_count = ADDRS_PER_BLOCK;
972
973 /* two direct node blocks */
974 result += (leaf_count * 2);
975
976 /* two indirect node blocks */
977 leaf_count *= NIDS_PER_BLOCK;
978 result += (leaf_count * 2);
979
980 /* one double indirect node block */
981 leaf_count *= NIDS_PER_BLOCK;
982 result += leaf_count;
983
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900984 return result;
985}
986
Jaegeuk Kimfd694732016-03-20 15:33:20 -0700987static int __f2fs_commit_super(struct buffer_head *bh,
988 struct f2fs_super_block *super)
Chao Yu9a59b622015-12-15 09:58:18 +0800989{
Jaegeuk Kimfd694732016-03-20 15:33:20 -0700990 lock_buffer(bh);
991 if (super)
992 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
993 set_buffer_uptodate(bh);
994 set_buffer_dirty(bh);
995 unlock_buffer(bh);
996
997 /* it's rare case, we can do fua all the time */
998 return __sync_dirty_buffer(bh, WRITE_FLUSH_FUA);
999}
1000
1001static inline bool sanity_check_area_boundary(struct super_block *sb,
1002 struct buffer_head *bh)
1003{
1004 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1005 (bh->b_data + F2FS_SUPER_OFFSET);
Chao Yu9a59b622015-12-15 09:58:18 +08001006 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1007 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
1008 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
1009 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
1010 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1011 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1012 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
1013 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
1014 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
1015 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
1016 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
1017 u32 segment_count = le32_to_cpu(raw_super->segment_count);
1018 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001019 u64 main_end_blkaddr = main_blkaddr +
1020 (segment_count_main << log_blocks_per_seg);
1021 u64 seg_end_blkaddr = segment0_blkaddr +
1022 (segment_count << log_blocks_per_seg);
Chao Yu9a59b622015-12-15 09:58:18 +08001023
1024 if (segment0_blkaddr != cp_blkaddr) {
1025 f2fs_msg(sb, KERN_INFO,
1026 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
1027 segment0_blkaddr, cp_blkaddr);
1028 return true;
1029 }
1030
1031 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
1032 sit_blkaddr) {
1033 f2fs_msg(sb, KERN_INFO,
1034 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
1035 cp_blkaddr, sit_blkaddr,
1036 segment_count_ckpt << log_blocks_per_seg);
1037 return true;
1038 }
1039
1040 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
1041 nat_blkaddr) {
1042 f2fs_msg(sb, KERN_INFO,
1043 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
1044 sit_blkaddr, nat_blkaddr,
1045 segment_count_sit << log_blocks_per_seg);
1046 return true;
1047 }
1048
1049 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
1050 ssa_blkaddr) {
1051 f2fs_msg(sb, KERN_INFO,
1052 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
1053 nat_blkaddr, ssa_blkaddr,
1054 segment_count_nat << log_blocks_per_seg);
1055 return true;
1056 }
1057
1058 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
1059 main_blkaddr) {
1060 f2fs_msg(sb, KERN_INFO,
1061 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
1062 ssa_blkaddr, main_blkaddr,
1063 segment_count_ssa << log_blocks_per_seg);
1064 return true;
1065 }
1066
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001067 if (main_end_blkaddr > seg_end_blkaddr) {
Chao Yu9a59b622015-12-15 09:58:18 +08001068 f2fs_msg(sb, KERN_INFO,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001069 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
Chao Yu9a59b622015-12-15 09:58:18 +08001070 main_blkaddr,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001071 segment0_blkaddr +
1072 (segment_count << log_blocks_per_seg),
Chao Yu9a59b622015-12-15 09:58:18 +08001073 segment_count_main << log_blocks_per_seg);
1074 return true;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001075 } else if (main_end_blkaddr < seg_end_blkaddr) {
1076 int err = 0;
1077 char *res;
Chao Yu9a59b622015-12-15 09:58:18 +08001078
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001079 /* fix in-memory information all the time */
1080 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
1081 segment0_blkaddr) >> log_blocks_per_seg);
1082
1083 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
1084 res = "internally";
1085 } else {
1086 err = __f2fs_commit_super(bh, NULL);
1087 res = err ? "failed" : "done";
1088 }
1089 f2fs_msg(sb, KERN_INFO,
1090 "Fix alignment : %s, start(%u) end(%u) block(%u)",
1091 res, main_blkaddr,
1092 segment0_blkaddr +
1093 (segment_count << log_blocks_per_seg),
1094 segment_count_main << log_blocks_per_seg);
1095 if (err)
1096 return true;
1097 }
Chao Yu9a59b622015-12-15 09:58:18 +08001098 return false;
1099}
1100
Namjae Jeona07ef782012-12-30 14:52:05 +09001101static int sanity_check_raw_super(struct super_block *sb,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001102 struct buffer_head *bh)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001103{
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001104 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1105 (bh->b_data + F2FS_SUPER_OFFSET);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001106 unsigned int blocksize;
1107
Namjae Jeona07ef782012-12-30 14:52:05 +09001108 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
1109 f2fs_msg(sb, KERN_INFO,
1110 "Magic Mismatch, valid(0x%x) - read(0x%x)",
1111 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001112 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001113 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001114
majianpeng5c9b4692013-02-01 19:07:57 +08001115 /* Currently, support only 4KB page cache size */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001116 if (F2FS_BLKSIZE != PAGE_SIZE) {
majianpeng5c9b4692013-02-01 19:07:57 +08001117 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +08001118 "Invalid page_cache_size (%lu), supports only 4KB\n",
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001119 PAGE_SIZE);
majianpeng5c9b4692013-02-01 19:07:57 +08001120 return 1;
1121 }
1122
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001123 /* Currently, support only 4KB block size */
1124 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +08001125 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001126 f2fs_msg(sb, KERN_INFO,
1127 "Invalid blocksize (%u), supports only 4KB\n",
1128 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001129 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001130 }
majianpeng5c9b4692013-02-01 19:07:57 +08001131
Chao Yu9a59b622015-12-15 09:58:18 +08001132 /* check log blocks per segment */
1133 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
1134 f2fs_msg(sb, KERN_INFO,
1135 "Invalid log blocks per segment (%u)\n",
1136 le32_to_cpu(raw_super->log_blocks_per_seg));
1137 return 1;
1138 }
1139
Chao Yu55cf9cb2014-09-15 18:01:10 +08001140 /* Currently, support 512/1024/2048/4096 bytes sector size */
1141 if (le32_to_cpu(raw_super->log_sectorsize) >
1142 F2FS_MAX_LOG_SECTOR_SIZE ||
1143 le32_to_cpu(raw_super->log_sectorsize) <
1144 F2FS_MIN_LOG_SECTOR_SIZE) {
1145 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
1146 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001147 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001148 }
Chao Yu55cf9cb2014-09-15 18:01:10 +08001149 if (le32_to_cpu(raw_super->log_sectors_per_block) +
1150 le32_to_cpu(raw_super->log_sectorsize) !=
1151 F2FS_MAX_LOG_SECTOR_SIZE) {
1152 f2fs_msg(sb, KERN_INFO,
1153 "Invalid log sectors per block(%u) log sectorsize(%u)",
1154 le32_to_cpu(raw_super->log_sectors_per_block),
1155 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001156 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001157 }
Chao Yu9a59b622015-12-15 09:58:18 +08001158
1159 /* check reserved ino info */
1160 if (le32_to_cpu(raw_super->node_ino) != 1 ||
1161 le32_to_cpu(raw_super->meta_ino) != 2 ||
1162 le32_to_cpu(raw_super->root_ino) != 3) {
1163 f2fs_msg(sb, KERN_INFO,
1164 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
1165 le32_to_cpu(raw_super->node_ino),
1166 le32_to_cpu(raw_super->meta_ino),
1167 le32_to_cpu(raw_super->root_ino));
1168 return 1;
1169 }
1170
1171 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001172 if (sanity_check_area_boundary(sb, bh))
Chao Yu9a59b622015-12-15 09:58:18 +08001173 return 1;
1174
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001175 return 0;
1176}
1177
Shawn Lin984ec632016-02-17 11:26:32 +08001178int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001179{
1180 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001181 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1182 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001183
1184 total = le32_to_cpu(raw_super->segment_count);
1185 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
1186 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
1187 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
1188 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
1189 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
1190
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001191 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001192 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001193
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -07001194 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001195 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
1196 return 1;
1197 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001198 return 0;
1199}
1200
1201static void init_sb_info(struct f2fs_sb_info *sbi)
1202{
1203 struct f2fs_super_block *raw_super = sbi->raw_super;
1204 int i;
1205
1206 sbi->log_sectors_per_block =
1207 le32_to_cpu(raw_super->log_sectors_per_block);
1208 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
1209 sbi->blocksize = 1 << sbi->log_blocksize;
1210 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
1211 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
1212 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
1213 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
1214 sbi->total_sections = le32_to_cpu(raw_super->section_count);
1215 sbi->total_node_count =
1216 (le32_to_cpu(raw_super->segment_count_nat) / 2)
1217 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
1218 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
1219 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
1220 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09001221 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +09001222 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001223
1224 for (i = 0; i < NR_COUNT_TYPE; i++)
1225 atomic_set(&sbi->nr_pages[i], 0);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +09001226
1227 sbi->dir_level = DEF_DIR_LEVEL;
Jaegeuk Kim6beceb52016-01-08 15:51:50 -08001228 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001229 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
Chao Yucaf00472015-01-28 17:48:42 +08001230 clear_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001231
1232 INIT_LIST_HEAD(&sbi->s_list);
1233 mutex_init(&sbi->umount_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001234}
1235
Gu Zheng9076a752013-10-14 18:47:11 +08001236/*
1237 * Read f2fs raw super block.
Shawn Lin2b39e902016-02-17 08:59:01 +08001238 * Because we have two copies of super block, so read both of them
1239 * to get the first valid one. If any one of them is broken, we pass
1240 * them recovery flag back to the caller.
Gu Zheng9076a752013-10-14 18:47:11 +08001241 */
1242static int read_raw_super_block(struct super_block *sb,
1243 struct f2fs_super_block **raw_super,
Chao Yue8240f62015-12-15 17:19:26 +08001244 int *valid_super_block, int *recovery)
majianpeng14d7e9d2013-02-01 19:07:03 +08001245{
Shawn Lin2b39e902016-02-17 08:59:01 +08001246 int block;
Chao Yue8240f62015-12-15 17:19:26 +08001247 struct buffer_head *bh;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001248 struct f2fs_super_block *super;
hujianyangda554e42015-05-21 14:42:53 +08001249 int err = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +08001250
Yunlei Heb39f0de2015-12-15 17:17:20 +08001251 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
1252 if (!super)
1253 return -ENOMEM;
Shawn Lin2b39e902016-02-17 08:59:01 +08001254
1255 for (block = 0; block < 2; block++) {
1256 bh = sb_bread(sb, block);
1257 if (!bh) {
1258 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
Gu Zheng9076a752013-10-14 18:47:11 +08001259 block + 1);
Shawn Lin2b39e902016-02-17 08:59:01 +08001260 err = -EIO;
1261 continue;
1262 }
majianpeng14d7e9d2013-02-01 19:07:03 +08001263
Shawn Lin2b39e902016-02-17 08:59:01 +08001264 /* sanity checking of raw super */
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001265 if (sanity_check_raw_super(sb, bh)) {
Shawn Lin2b39e902016-02-17 08:59:01 +08001266 f2fs_msg(sb, KERN_ERR,
1267 "Can't find valid F2FS filesystem in %dth superblock",
1268 block + 1);
1269 err = -EINVAL;
1270 brelse(bh);
1271 continue;
1272 }
1273
1274 if (!*raw_super) {
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001275 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
1276 sizeof(*super));
Shawn Lin2b39e902016-02-17 08:59:01 +08001277 *valid_super_block = block;
1278 *raw_super = super;
1279 }
Chao Yue8240f62015-12-15 17:19:26 +08001280 brelse(bh);
Shawn Lin2b39e902016-02-17 08:59:01 +08001281 }
1282
1283 /* Fail to read any one of the superblocks*/
1284 if (err < 0)
hujianyangda554e42015-05-21 14:42:53 +08001285 *recovery = 1;
hujianyangda554e42015-05-21 14:42:53 +08001286
hujianyangda554e42015-05-21 14:42:53 +08001287 /* No valid superblock */
Shawn Lin2b39e902016-02-17 08:59:01 +08001288 if (!*raw_super)
Yunlei Heb39f0de2015-12-15 17:17:20 +08001289 kfree(super);
Shawn Lin2b39e902016-02-17 08:59:01 +08001290 else
1291 err = 0;
hujianyangda554e42015-05-21 14:42:53 +08001292
Shawn Lin2b39e902016-02-17 08:59:01 +08001293 return err;
majianpeng14d7e9d2013-02-01 19:07:03 +08001294}
1295
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001296int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001297{
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001298 struct buffer_head *bh;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001299 int err;
1300
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001301 /* write back-up superblock first */
1302 bh = sb_getblk(sbi->sb, sbi->valid_super_block ? 0: 1);
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001303 if (!bh)
1304 return -EIO;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001305 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001306 brelse(bh);
Chao Yuc5bda1c2015-06-08 13:28:03 +08001307
1308 /* if we are in recovery path, skip writing valid superblock */
1309 if (recover || err)
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001310 return err;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001311
Chao Yue8240f62015-12-15 17:19:26 +08001312 /* write current valid superblock */
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001313 bh = sb_getblk(sbi->sb, sbi->valid_super_block);
1314 if (!bh)
1315 return -EIO;
1316 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
1317 brelse(bh);
1318 return err;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001319}
1320
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001321static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
1322{
1323 struct f2fs_sb_info *sbi;
hujianyangda554e42015-05-21 14:42:53 +08001324 struct f2fs_super_block *raw_super;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001325 struct inode *root;
hujianyangda554e42015-05-21 14:42:53 +08001326 long err;
Chao Yu2adc3502015-03-16 21:08:44 +08001327 bool retry = true, need_fsck = false;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001328 char *options = NULL;
Chao Yue8240f62015-12-15 17:19:26 +08001329 int recovery, i, valid_super_block;
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001330 struct curseg_info *seg_i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001331
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001332try_onemore:
hujianyangda554e42015-05-21 14:42:53 +08001333 err = -EINVAL;
1334 raw_super = NULL;
Chao Yue8240f62015-12-15 17:19:26 +08001335 valid_super_block = -1;
hujianyangda554e42015-05-21 14:42:53 +08001336 recovery = 0;
1337
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001338 /* allocate memory for f2fs-specific super block info */
1339 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
1340 if (!sbi)
1341 return -ENOMEM;
1342
Keith Mok43b65732016-03-02 12:04:24 -08001343 /* Load the checksum driver */
1344 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
1345 if (IS_ERR(sbi->s_chksum_driver)) {
1346 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
1347 err = PTR_ERR(sbi->s_chksum_driver);
1348 sbi->s_chksum_driver = NULL;
1349 goto free_sbi;
1350 }
1351
Namjae Jeonff9234a2013-01-12 14:41:13 +09001352 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001353 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001354 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001355 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +09001356 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001357
Chao Yue8240f62015-12-15 17:19:26 +08001358 err = read_raw_super_block(sb, &raw_super, &valid_super_block,
1359 &recovery);
Gu Zheng9076a752013-10-14 18:47:11 +08001360 if (err)
1361 goto free_sbi;
1362
Gu Zheng5fb08372013-06-07 14:16:53 +08001363 sb->s_fs_info = sbi;
Yunlei He498c5e92015-05-07 18:11:37 +08001364 default_options(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001365 /* parse mount options */
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001366 options = kstrdup((const char *)data, GFP_KERNEL);
1367 if (data && !options) {
1368 err = -ENOMEM;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001369 goto free_sb_buf;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001370 }
1371
1372 err = parse_options(sb, options);
1373 if (err)
1374 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001375
Chao Yue0afc4d2015-12-31 14:35:37 +08001376 sbi->max_file_blocks = max_file_blocks();
1377 sb->s_maxbytes = sbi->max_file_blocks <<
1378 le32_to_cpu(raw_super->log_blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001379 sb->s_max_links = F2FS_LINK_MAX;
1380 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1381
1382 sb->s_op = &f2fs_sops;
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001383 sb->s_cop = &f2fs_cryptops;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001384 sb->s_xattr = f2fs_xattr_handlers;
1385 sb->s_export_op = &f2fs_export_ops;
1386 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001387 sb->s_time_gran = 1;
1388 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1389 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1390 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1391
1392 /* init f2fs-specific super block info */
1393 sbi->sb = sb;
1394 sbi->raw_super = raw_super;
Chao Yue8240f62015-12-15 17:19:26 +08001395 sbi->valid_super_block = valid_super_block;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001396 mutex_init(&sbi->gc_mutex);
Jaegeuk Kim5463e7c2015-04-21 10:40:54 -07001397 mutex_init(&sbi->writepages);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001398 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +08001399 init_rwsem(&sbi->node_write);
Jaegeuk Kim315df832015-08-11 12:45:39 -07001400
1401 /* disallow all the data/node/meta page writes */
1402 set_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001403 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001404
Chao Yudf0f8dc2014-03-22 14:57:23 +08001405 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001406 sbi->read_io.sbi = sbi;
1407 sbi->read_io.bio = NULL;
1408 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +08001409 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001410 sbi->write_io[i].sbi = sbi;
1411 sbi->write_io[i].bio = NULL;
1412 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001413
Gu Zhenge4795562013-09-27 18:08:30 +08001414 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +09001415 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001416 init_sb_info(sbi);
1417
1418 /* get an inode for meta space */
1419 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1420 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001421 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001422 err = PTR_ERR(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001423 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001424 }
1425
1426 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001427 if (err) {
1428 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001429 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +09001430 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001431
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001432 sbi->total_valid_node_count =
1433 le32_to_cpu(sbi->ckpt->valid_node_count);
1434 sbi->total_valid_inode_count =
1435 le32_to_cpu(sbi->ckpt->valid_inode_count);
1436 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1437 sbi->total_valid_block_count =
1438 le64_to_cpu(sbi->ckpt->valid_block_count);
1439 sbi->last_valid_block_count = sbi->total_valid_block_count;
1440 sbi->alloc_valid_block_count = 0;
Chao Yuc227f912015-12-16 13:09:20 +08001441 for (i = 0; i < NR_INODE_TYPE; i++) {
1442 INIT_LIST_HEAD(&sbi->inode_list[i]);
1443 spin_lock_init(&sbi->inode_lock[i]);
1444 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001445
Chao Yu1dcc3362015-02-05 17:57:31 +08001446 init_extent_cache_info(sbi);
1447
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001448 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001449
1450 /* setup f2fs internal modules */
1451 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001452 if (err) {
1453 f2fs_msg(sb, KERN_ERR,
1454 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001455 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001456 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001457 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001458 if (err) {
1459 f2fs_msg(sb, KERN_ERR,
1460 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001461 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001462 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001463
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001464 /* For write statistics */
1465 if (sb->s_bdev->bd_part)
1466 sbi->sectors_written_start =
1467 (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]);
1468
1469 /* Read accumulated write IO statistics if exists */
1470 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1471 if (__exist_node_summaries(sbi))
1472 sbi->kbytes_written =
Shuoran Liub2dde6f2016-03-29 18:00:15 +08001473 le64_to_cpu(seg_i->journal->info.kbytes_written);
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001474
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001475 build_gc_manager(sbi);
1476
1477 /* get an inode for node space */
1478 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1479 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001480 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001481 err = PTR_ERR(sbi->node_inode);
1482 goto free_nm;
1483 }
1484
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001485 f2fs_join_shrinker(sbi);
1486
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001487 /* if there are nt orphan nodes free them */
Chao Yu8c14bfa2015-08-07 17:58:43 +08001488 err = recover_orphan_inodes(sbi);
1489 if (err)
1490 goto free_node_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001491
1492 /* read root inode and dentry */
1493 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1494 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001495 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001496 err = PTR_ERR(root);
1497 goto free_node_inode;
1498 }
Chao Yu8f99a942013-11-28 15:43:43 +08001499 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001500 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001501 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001502 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001503 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001504
1505 sb->s_root = d_make_root(root); /* allocate root dentry */
1506 if (!sb->s_root) {
1507 err = -ENOMEM;
1508 goto free_root_inode;
1509 }
1510
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001511 err = f2fs_build_stats(sbi);
1512 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001513 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001514
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001515 if (f2fs_proc_root)
1516 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1517
1518 if (sbi->s_proc)
1519 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1520 &f2fs_seq_segment_info_fops, sb);
1521
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001522 sbi->s_kobj.kset = f2fs_kset;
1523 init_completion(&sbi->s_kobj_unregister);
1524 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1525 "%s", sb->s_id);
1526 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001527 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001528
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001529 /* recover fsynced data */
1530 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
Jaegeuk Kim081d78c2015-01-23 19:16:59 -08001531 /*
1532 * mount should be failed, when device has readonly mode, and
1533 * previous checkpoint was not done by clean system shutdown.
1534 */
1535 if (bdev_read_only(sb->s_bdev) &&
1536 !is_set_ckpt_flags(sbi->ckpt, CP_UMOUNT_FLAG)) {
1537 err = -EROFS;
1538 goto free_kobj;
1539 }
Chao Yu2adc3502015-03-16 21:08:44 +08001540
1541 if (need_fsck)
1542 set_sbi_flag(sbi, SBI_NEED_FSCK);
1543
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001544 err = recover_fsync_data(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001545 if (err) {
Chao Yu2adc3502015-03-16 21:08:44 +08001546 need_fsck = true;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001547 f2fs_msg(sb, KERN_ERR,
1548 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001549 goto free_kobj;
1550 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001551 }
Jaegeuk Kim315df832015-08-11 12:45:39 -07001552 /* recover_fsync_data() cleared this already */
1553 clear_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001554
1555 /*
1556 * If filesystem is not mounted as read-only then
1557 * do start the gc_thread.
1558 */
Chao Yu6c029932014-11-18 11:16:01 +08001559 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001560 /* After POR, we can run background GC thread.*/
1561 err = start_gc_thread(sbi);
1562 if (err)
1563 goto free_kobj;
1564 }
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001565 kfree(options);
hujianyangda554e42015-05-21 14:42:53 +08001566
1567 /* recover broken superblock */
1568 if (recovery && !f2fs_readonly(sb) && !bdev_read_only(sb->s_bdev)) {
Chao Yu41214b32016-02-22 18:33:20 +08001569 err = f2fs_commit_super(sbi, true);
1570 f2fs_msg(sb, KERN_INFO,
1571 "Try to recover %dth superblock, ret: %ld",
1572 sbi->valid_super_block ? 1 : 2, err);
hujianyangda554e42015-05-21 14:42:53 +08001573 }
1574
Jaegeuk Kim6beceb52016-01-08 15:51:50 -08001575 f2fs_update_time(sbi, CP_TIME);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001576 f2fs_update_time(sbi, REQ_TIME);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001577 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001578
1579free_kobj:
1580 kobject_del(&sbi->s_kobj);
Chao Yu29ba1082015-11-16 20:38:25 +08001581 kobject_put(&sbi->s_kobj);
1582 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001583free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001584 if (sbi->s_proc) {
1585 remove_proc_entry("segment_info", sbi->s_proc);
1586 remove_proc_entry(sb->s_id, f2fs_proc_root);
1587 }
1588 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001589free_root_inode:
1590 dput(sb->s_root);
1591 sb->s_root = NULL;
1592free_node_inode:
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001593 mutex_lock(&sbi->umount_mutex);
1594 f2fs_leave_shrinker(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001595 iput(sbi->node_inode);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001596 mutex_unlock(&sbi->umount_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001597free_nm:
1598 destroy_node_manager(sbi);
1599free_sm:
1600 destroy_segment_manager(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001601 kfree(sbi->ckpt);
1602free_meta_inode:
1603 make_bad_inode(sbi->meta_inode);
1604 iput(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001605free_options:
1606 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001607free_sb_buf:
Yunlei Heb39f0de2015-12-15 17:17:20 +08001608 kfree(raw_super);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001609free_sbi:
Keith Mok43b65732016-03-02 12:04:24 -08001610 if (sbi->s_chksum_driver)
1611 crypto_free_shash(sbi->s_chksum_driver);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001612 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001613
1614 /* give only one another chance */
1615 if (retry) {
Taehee Yoo9df47ba2015-04-13 21:48:06 +09001616 retry = false;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001617 shrink_dcache_sb(sb);
1618 goto try_onemore;
1619 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001620 return err;
1621}
1622
1623static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1624 const char *dev_name, void *data)
1625{
1626 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1627}
1628
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001629static void kill_f2fs_super(struct super_block *sb)
1630{
1631 if (sb->s_root)
Chao Yucaf00472015-01-28 17:48:42 +08001632 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001633 kill_block_super(sb);
1634}
1635
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001636static struct file_system_type f2fs_fs_type = {
1637 .owner = THIS_MODULE,
1638 .name = "f2fs",
1639 .mount = f2fs_mount,
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001640 .kill_sb = kill_f2fs_super,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001641 .fs_flags = FS_REQUIRES_DEV,
1642};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001643MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001644
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001645static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001646{
Vladimir Davydov5d097052016-01-14 15:18:21 -08001647 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
1648 sizeof(struct f2fs_inode_info), 0,
1649 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001650 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001651 return -ENOMEM;
1652 return 0;
1653}
1654
1655static void destroy_inodecache(void)
1656{
1657 /*
1658 * Make sure all delayed rcu free inodes are flushed before we
1659 * destroy cache.
1660 */
1661 rcu_barrier();
1662 kmem_cache_destroy(f2fs_inode_cachep);
1663}
1664
1665static int __init init_f2fs_fs(void)
1666{
1667 int err;
1668
Jaegeuk Kimc0508652015-01-07 14:07:36 -08001669 f2fs_build_trace_ios();
1670
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001671 err = init_inodecache();
1672 if (err)
1673 goto fail;
1674 err = create_node_manager_caches();
1675 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001676 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001677 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001678 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001679 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001680 err = create_checkpoint_caches();
1681 if (err)
Chao Yu06292072014-12-29 15:56:18 +08001682 goto free_segment_manager_caches;
Chao Yu1dcc3362015-02-05 17:57:31 +08001683 err = create_extent_cache();
1684 if (err)
1685 goto free_checkpoint_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001686 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001687 if (!f2fs_kset) {
1688 err = -ENOMEM;
Chao Yu1dcc3362015-02-05 17:57:31 +08001689 goto free_extent_cache;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001690 }
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001691 err = register_shrinker(&f2fs_shrinker_info);
Jaegeuk Kimcfc4d972015-05-15 15:37:24 -07001692 if (err)
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001693 goto free_kset;
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001694
1695 err = register_filesystem(&f2fs_fs_type);
1696 if (err)
1697 goto free_shrinker;
Chao Yu787c7b8c2015-10-29 09:13:04 +08001698 err = f2fs_create_root_stats();
1699 if (err)
1700 goto free_filesystem;
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001701 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001702 return 0;
1703
Chao Yu787c7b8c2015-10-29 09:13:04 +08001704free_filesystem:
1705 unregister_filesystem(&f2fs_fs_type);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001706free_shrinker:
1707 unregister_shrinker(&f2fs_shrinker_info);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001708free_kset:
1709 kset_unregister(f2fs_kset);
Chao Yu1dcc3362015-02-05 17:57:31 +08001710free_extent_cache:
1711 destroy_extent_cache();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001712free_checkpoint_caches:
1713 destroy_checkpoint_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001714free_segment_manager_caches:
1715 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001716free_node_manager_caches:
1717 destroy_node_manager_caches();
1718free_inodecache:
1719 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001720fail:
1721 return err;
1722}
1723
1724static void __exit exit_f2fs_fs(void)
1725{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001726 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001727 f2fs_destroy_root_stats();
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001728 unregister_shrinker(&f2fs_shrinker_info);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001729 unregister_filesystem(&f2fs_fs_type);
Wanpeng Lifdf6c8b2015-03-06 15:00:54 +08001730 destroy_extent_cache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001731 destroy_checkpoint_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001732 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001733 destroy_node_manager_caches();
1734 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001735 kset_unregister(f2fs_kset);
Jaegeuk Kim351f4fb2015-01-07 14:09:48 -08001736 f2fs_destroy_trace_ios();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001737}
1738
1739module_init(init_f2fs_fs)
1740module_exit(exit_f2fs_fs)
1741
1742MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1743MODULE_DESCRIPTION("Flash Friendly File System");
1744MODULE_LICENSE("GPL");