blob: eb20b8767f3ce0a1bc60b6719ccf51c44332628b [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 Kim73faec42016-04-29 15:34:32 -070042#ifdef CONFIG_F2FS_FAULT_INJECTION
Jaegeuk Kim2c63fea2016-04-29 15:49:56 -070043
44char *fault_name[FAULT_MAX] = {
45 [FAULT_KMALLOC] = "kmalloc",
Jaegeuk Kimc41f3cc32016-04-29 16:17:09 -070046 [FAULT_PAGE_ALLOC] = "page alloc",
Jaegeuk Kimcb789422016-04-29 16:29:22 -070047 [FAULT_ALLOC_NID] = "alloc nid",
48 [FAULT_ORPHAN] = "orphan",
49 [FAULT_BLOCK] = "no more block",
50 [FAULT_DIR_DEPTH] = "too big dir depth",
Jaegeuk Kim53aa6bb2016-05-25 15:24:18 -070051 [FAULT_EVICT_INODE] = "evict_inode fail",
Chao Yu8b038c72016-09-18 23:30:07 +080052 [FAULT_IO] = "IO error",
Chao Yu0f348022016-09-26 19:45:55 +080053 [FAULT_CHECKPOINT] = "checkpoint error",
Jaegeuk Kim2c63fea2016-04-29 15:49:56 -070054};
Sheng Yong08796892016-05-16 12:38:50 +080055
Chao Yu1ecc0c52016-09-23 21:30:09 +080056static void f2fs_build_fault_attr(struct f2fs_sb_info *sbi,
57 unsigned int rate)
Sheng Yong08796892016-05-16 12:38:50 +080058{
Chao Yu1ecc0c52016-09-23 21:30:09 +080059 struct f2fs_fault_info *ffi = &sbi->fault_info;
60
Sheng Yong08796892016-05-16 12:38:50 +080061 if (rate) {
Chao Yu1ecc0c52016-09-23 21:30:09 +080062 atomic_set(&ffi->inject_ops, 0);
63 ffi->inject_rate = rate;
64 ffi->inject_type = (1 << FAULT_MAX) - 1;
Sheng Yong08796892016-05-16 12:38:50 +080065 } else {
Chao Yu1ecc0c52016-09-23 21:30:09 +080066 memset(ffi, 0, sizeof(struct f2fs_fault_info));
Sheng Yong08796892016-05-16 12:38:50 +080067 }
68}
Jaegeuk Kim73faec42016-04-29 15:34:32 -070069#endif
70
Jaegeuk Kim2658e502015-06-19 12:01:21 -070071/* f2fs-wide shrinker description */
72static struct shrinker f2fs_shrinker_info = {
73 .scan_objects = f2fs_shrink_scan,
74 .count_objects = f2fs_shrink_count,
75 .seeks = DEFAULT_SEEKS,
76};
77
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090078enum {
Namjae Jeon696c0182013-06-16 09:48:48 +090079 Opt_gc_background,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090080 Opt_disable_roll_forward,
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -080081 Opt_norecovery,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090082 Opt_discard,
Chao Yu64058be2016-07-03 22:05:14 +080083 Opt_nodiscard,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090084 Opt_noheap,
Kelly Anderson4058c512013-10-07 11:36:20 +090085 Opt_user_xattr,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090086 Opt_nouser_xattr,
Kelly Anderson4058c512013-10-07 11:36:20 +090087 Opt_acl,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090088 Opt_noacl,
89 Opt_active_logs,
90 Opt_disable_ext_identify,
Jaegeuk Kim444c5802013-08-08 15:16:22 +090091 Opt_inline_xattr,
Huajun Li8274de72013-11-10 23:13:17 +080092 Opt_inline_data,
Chao Yu5efd3c62014-09-24 18:16:13 +080093 Opt_inline_dentry,
Chao Yu97c17942016-05-09 19:56:34 +080094 Opt_noinline_dentry,
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090095 Opt_flush_merge,
Jaegeuk Kim69e9e422016-05-20 22:39:20 -070096 Opt_noflush_merge,
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070097 Opt_nobarrier,
Jaegeuk Kimd5053a342014-10-30 22:47:03 -070098 Opt_fastboot,
Chao Yu89672152015-02-05 17:55:51 +080099 Opt_extent_cache,
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700100 Opt_noextent_cache,
Wanpeng Li75342792015-03-24 10:20:27 +0800101 Opt_noinline_data,
Chao Yu343f40f2015-12-16 13:12:16 +0800102 Opt_data_flush,
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700103 Opt_mode,
Jaegeuk Kim73faec42016-04-29 15:34:32 -0700104 Opt_fault_injection,
Jaegeuk Kim6d94c742016-05-20 21:47:24 -0700105 Opt_lazytime,
106 Opt_nolazytime,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900107 Opt_err,
108};
109
110static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +0900111 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900112 {Opt_disable_roll_forward, "disable_roll_forward"},
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -0800113 {Opt_norecovery, "norecovery"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900114 {Opt_discard, "discard"},
Chao Yu64058be2016-07-03 22:05:14 +0800115 {Opt_nodiscard, "nodiscard"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900116 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +0900117 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900118 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +0900119 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900120 {Opt_noacl, "noacl"},
121 {Opt_active_logs, "active_logs=%u"},
122 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900123 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +0800124 {Opt_inline_data, "inline_data"},
Chao Yu5efd3c62014-09-24 18:16:13 +0800125 {Opt_inline_dentry, "inline_dentry"},
Chao Yu97c17942016-05-09 19:56:34 +0800126 {Opt_noinline_dentry, "noinline_dentry"},
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900127 {Opt_flush_merge, "flush_merge"},
Jaegeuk Kim69e9e422016-05-20 22:39:20 -0700128 {Opt_noflush_merge, "noflush_merge"},
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700129 {Opt_nobarrier, "nobarrier"},
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700130 {Opt_fastboot, "fastboot"},
Chao Yu89672152015-02-05 17:55:51 +0800131 {Opt_extent_cache, "extent_cache"},
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700132 {Opt_noextent_cache, "noextent_cache"},
Wanpeng Li75342792015-03-24 10:20:27 +0800133 {Opt_noinline_data, "noinline_data"},
Chao Yu343f40f2015-12-16 13:12:16 +0800134 {Opt_data_flush, "data_flush"},
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700135 {Opt_mode, "mode=%s"},
Jaegeuk Kim73faec42016-04-29 15:34:32 -0700136 {Opt_fault_injection, "fault_injection=%u"},
Jaegeuk Kim6d94c742016-05-20 21:47:24 -0700137 {Opt_lazytime, "lazytime"},
138 {Opt_nolazytime, "nolazytime"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900139 {Opt_err, NULL},
140};
141
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900142/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900143enum {
144 GC_THREAD, /* struct f2fs_gc_thread */
145 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900146 NM_INFO, /* struct f2fs_nm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900147 F2FS_SBI, /* struct f2fs_sb_info */
Sheng Yong08796892016-05-16 12:38:50 +0800148#ifdef CONFIG_F2FS_FAULT_INJECTION
149 FAULT_INFO_RATE, /* struct f2fs_fault_info */
150 FAULT_INFO_TYPE, /* struct f2fs_fault_info */
151#endif
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900152};
153
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900154struct f2fs_attr {
155 struct attribute attr;
156 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
157 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
158 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900159 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900160 int offset;
161};
162
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900163static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
164{
165 if (struct_type == GC_THREAD)
166 return (unsigned char *)sbi->gc_thread;
167 else if (struct_type == SM_INFO)
168 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900169 else if (struct_type == NM_INFO)
170 return (unsigned char *)NM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900171 else if (struct_type == F2FS_SBI)
172 return (unsigned char *)sbi;
Sheng Yong08796892016-05-16 12:38:50 +0800173#ifdef CONFIG_F2FS_FAULT_INJECTION
174 else if (struct_type == FAULT_INFO_RATE ||
175 struct_type == FAULT_INFO_TYPE)
Chao Yu1ecc0c52016-09-23 21:30:09 +0800176 return (unsigned char *)&sbi->fault_info;
Sheng Yong08796892016-05-16 12:38:50 +0800177#endif
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900178 return NULL;
179}
180
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800181static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
182 struct f2fs_sb_info *sbi, char *buf)
183{
184 struct super_block *sb = sbi->sb;
185
186 if (!sb->s_bdev->bd_part)
187 return snprintf(buf, PAGE_SIZE, "0\n");
188
189 return snprintf(buf, PAGE_SIZE, "%llu\n",
190 (unsigned long long)(sbi->kbytes_written +
191 BD_PART_WRITTEN(sbi)));
192}
193
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900194static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
195 struct f2fs_sb_info *sbi, char *buf)
196{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900197 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900198 unsigned int *ui;
199
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900200 ptr = __struct_ptr(sbi, a->struct_type);
201 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900202 return -EINVAL;
203
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900204 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900205
206 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
207}
208
209static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
210 struct f2fs_sb_info *sbi,
211 const char *buf, size_t count)
212{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900213 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900214 unsigned long t;
215 unsigned int *ui;
216 ssize_t ret;
217
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900218 ptr = __struct_ptr(sbi, a->struct_type);
219 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900220 return -EINVAL;
221
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900222 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900223
224 ret = kstrtoul(skip_spaces(buf), 0, &t);
225 if (ret < 0)
226 return ret;
Sheng Yong08796892016-05-16 12:38:50 +0800227#ifdef CONFIG_F2FS_FAULT_INJECTION
228 if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
229 return -EINVAL;
230#endif
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900231 *ui = t;
232 return count;
233}
234
235static ssize_t f2fs_attr_show(struct kobject *kobj,
236 struct attribute *attr, char *buf)
237{
238 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
239 s_kobj);
240 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
241
242 return a->show ? a->show(a, sbi, buf) : 0;
243}
244
245static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
246 const char *buf, size_t len)
247{
248 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
249 s_kobj);
250 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
251
252 return a->store ? a->store(a, sbi, buf, len) : 0;
253}
254
255static void f2fs_sb_release(struct kobject *kobj)
256{
257 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
258 s_kobj);
259 complete(&sbi->s_kobj_unregister);
260}
261
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900262#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900263static struct f2fs_attr f2fs_attr_##_name = { \
264 .attr = {.name = __stringify(_name), .mode = _mode }, \
265 .show = _show, \
266 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900267 .struct_type = _struct_type, \
268 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900269}
270
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900271#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
272 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
273 f2fs_sbi_show, f2fs_sbi_store, \
274 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900275
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800276#define F2FS_GENERAL_RO_ATTR(name) \
277static struct f2fs_attr f2fs_attr_##name = __ATTR(name, 0444, name##_show, NULL)
278
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900279F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
280F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
281F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
282F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
283F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900284F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800285F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, batched_trim_sections, trim_sections);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900286F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
287F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700288F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_fsync_blocks, min_fsync_blocks);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900289F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
Chao Yuea1a29a02015-10-12 17:08:48 +0800290F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ra_nid_pages, ra_nid_pages);
Chao Yu2304cb02016-01-18 18:32:58 +0800291F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, dirty_nats_ratio, dirty_nats_ratio);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900292F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900293F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
Jaegeuk Kim6beceb52016-01-08 15:51:50 -0800294F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, cp_interval, interval_time[CP_TIME]);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800295F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
Sheng Yong08796892016-05-16 12:38:50 +0800296#ifdef CONFIG_F2FS_FAULT_INJECTION
297F2FS_RW_ATTR(FAULT_INFO_RATE, f2fs_fault_info, inject_rate, inject_rate);
298F2FS_RW_ATTR(FAULT_INFO_TYPE, f2fs_fault_info, inject_type, inject_type);
299#endif
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800300F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900301
302#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
303static struct attribute *f2fs_attrs[] = {
304 ATTR_LIST(gc_min_sleep_time),
305 ATTR_LIST(gc_max_sleep_time),
306 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900307 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900308 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900309 ATTR_LIST(max_small_discards),
Jaegeuk Kimbba681c2015-01-26 17:41:23 -0800310 ATTR_LIST(batched_trim_sections),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900311 ATTR_LIST(ipu_policy),
312 ATTR_LIST(min_ipu_util),
Jaegeuk Kimc1ce1b02014-09-10 16:53:02 -0700313 ATTR_LIST(min_fsync_blocks),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900314 ATTR_LIST(max_victim_search),
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900315 ATTR_LIST(dir_level),
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900316 ATTR_LIST(ram_thresh),
Chao Yuea1a29a02015-10-12 17:08:48 +0800317 ATTR_LIST(ra_nid_pages),
Chao Yu2304cb02016-01-18 18:32:58 +0800318 ATTR_LIST(dirty_nats_ratio),
Jaegeuk Kim60b99b42015-10-05 14:49:57 -0700319 ATTR_LIST(cp_interval),
Jaegeuk Kimd0239e12016-01-08 16:57:48 -0800320 ATTR_LIST(idle_interval),
Chao Yu1ecc0c52016-09-23 21:30:09 +0800321#ifdef CONFIG_F2FS_FAULT_INJECTION
322 ATTR_LIST(inject_rate),
323 ATTR_LIST(inject_type),
324#endif
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +0800325 ATTR_LIST(lifetime_write_kbytes),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900326 NULL,
327};
328
329static const struct sysfs_ops f2fs_attr_ops = {
330 .show = f2fs_attr_show,
331 .store = f2fs_attr_store,
332};
333
334static struct kobj_type f2fs_ktype = {
335 .default_attrs = f2fs_attrs,
336 .sysfs_ops = &f2fs_attr_ops,
337 .release = f2fs_sb_release,
338};
339
Namjae Jeona07ef782012-12-30 14:52:05 +0900340void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
341{
342 struct va_format vaf;
343 va_list args;
344
345 va_start(args, fmt);
346 vaf.fmt = fmt;
347 vaf.va = &args;
348 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
349 va_end(args);
350}
351
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900352static void init_once(void *foo)
353{
354 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
355
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900356 inode_init_once(&fi->vfs_inode);
357}
358
Namjae Jeon696c0182013-06-16 09:48:48 +0900359static int parse_options(struct super_block *sb, char *options)
360{
361 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chao Yu09d54cd2015-06-08 13:20:10 +0800362 struct request_queue *q;
Namjae Jeon696c0182013-06-16 09:48:48 +0900363 substring_t args[MAX_OPT_ARGS];
364 char *p, *name;
365 int arg = 0;
366
367 if (!options)
368 return 0;
369
370 while ((p = strsep(&options, ",")) != NULL) {
371 int token;
372 if (!*p)
373 continue;
374 /*
375 * Initialize args struct so we know whether arg was
376 * found; some options take optional arguments.
377 */
378 args[0].to = args[0].from = NULL;
379 token = match_token(p, f2fs_tokens, args);
380
381 switch (token) {
382 case Opt_gc_background:
383 name = match_strdup(&args[0]);
384
385 if (!name)
386 return -ENOMEM;
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700387 if (strlen(name) == 2 && !strncmp(name, "on", 2)) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900388 set_opt(sbi, BG_GC);
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700389 clear_opt(sbi, FORCE_FG_GC);
390 } else if (strlen(name) == 3 && !strncmp(name, "off", 3)) {
Namjae Jeon696c0182013-06-16 09:48:48 +0900391 clear_opt(sbi, BG_GC);
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700392 clear_opt(sbi, FORCE_FG_GC);
393 } else if (strlen(name) == 4 && !strncmp(name, "sync", 4)) {
394 set_opt(sbi, BG_GC);
395 set_opt(sbi, FORCE_FG_GC);
396 } else {
Namjae Jeon696c0182013-06-16 09:48:48 +0900397 kfree(name);
398 return -EINVAL;
399 }
400 kfree(name);
401 break;
402 case Opt_disable_roll_forward:
403 set_opt(sbi, DISABLE_ROLL_FORWARD);
404 break;
Jaegeuk Kim2d834bf2015-01-23 18:33:46 -0800405 case Opt_norecovery:
406 /* this option mounts f2fs with ro */
407 set_opt(sbi, DISABLE_ROLL_FORWARD);
408 if (!f2fs_readonly(sb))
409 return -EINVAL;
410 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900411 case Opt_discard:
Chao Yu09d54cd2015-06-08 13:20:10 +0800412 q = bdev_get_queue(sb->s_bdev);
413 if (blk_queue_discard(q)) {
414 set_opt(sbi, DISCARD);
415 } else {
416 f2fs_msg(sb, KERN_WARNING,
417 "mounting with \"discard\" option, but "
418 "the device does not support discard");
419 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900420 break;
Chao Yu64058be2016-07-03 22:05:14 +0800421 case Opt_nodiscard:
422 clear_opt(sbi, DISCARD);
Namjae Jeon696c0182013-06-16 09:48:48 +0900423 case Opt_noheap:
424 set_opt(sbi, NOHEAP);
425 break;
426#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900427 case Opt_user_xattr:
428 set_opt(sbi, XATTR_USER);
429 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900430 case Opt_nouser_xattr:
431 clear_opt(sbi, XATTR_USER);
432 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900433 case Opt_inline_xattr:
434 set_opt(sbi, INLINE_XATTR);
435 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900436#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900437 case Opt_user_xattr:
438 f2fs_msg(sb, KERN_INFO,
439 "user_xattr options not supported");
440 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900441 case Opt_nouser_xattr:
442 f2fs_msg(sb, KERN_INFO,
443 "nouser_xattr options not supported");
444 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900445 case Opt_inline_xattr:
446 f2fs_msg(sb, KERN_INFO,
447 "inline_xattr options not supported");
448 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900449#endif
450#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900451 case Opt_acl:
452 set_opt(sbi, POSIX_ACL);
453 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900454 case Opt_noacl:
455 clear_opt(sbi, POSIX_ACL);
456 break;
457#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900458 case Opt_acl:
459 f2fs_msg(sb, KERN_INFO, "acl options not supported");
460 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900461 case Opt_noacl:
462 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
463 break;
464#endif
465 case Opt_active_logs:
466 if (args->from && match_int(args, &arg))
467 return -EINVAL;
468 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
469 return -EINVAL;
470 sbi->active_logs = arg;
471 break;
472 case Opt_disable_ext_identify:
473 set_opt(sbi, DISABLE_EXT_IDENTIFY);
474 break;
Huajun Li8274de72013-11-10 23:13:17 +0800475 case Opt_inline_data:
476 set_opt(sbi, INLINE_DATA);
477 break;
Chao Yu5efd3c62014-09-24 18:16:13 +0800478 case Opt_inline_dentry:
479 set_opt(sbi, INLINE_DENTRY);
480 break;
Chao Yu97c17942016-05-09 19:56:34 +0800481 case Opt_noinline_dentry:
482 clear_opt(sbi, INLINE_DENTRY);
483 break;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900484 case Opt_flush_merge:
485 set_opt(sbi, FLUSH_MERGE);
486 break;
Jaegeuk Kim69e9e422016-05-20 22:39:20 -0700487 case Opt_noflush_merge:
488 clear_opt(sbi, FLUSH_MERGE);
489 break;
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700490 case Opt_nobarrier:
491 set_opt(sbi, NOBARRIER);
492 break;
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700493 case Opt_fastboot:
494 set_opt(sbi, FASTBOOT);
495 break;
Chao Yu89672152015-02-05 17:55:51 +0800496 case Opt_extent_cache:
497 set_opt(sbi, EXTENT_CACHE);
498 break;
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700499 case Opt_noextent_cache:
500 clear_opt(sbi, EXTENT_CACHE);
501 break;
Wanpeng Li75342792015-03-24 10:20:27 +0800502 case Opt_noinline_data:
503 clear_opt(sbi, INLINE_DATA);
504 break;
Chao Yu343f40f2015-12-16 13:12:16 +0800505 case Opt_data_flush:
506 set_opt(sbi, DATA_FLUSH);
507 break;
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700508 case Opt_mode:
509 name = match_strdup(&args[0]);
510
511 if (!name)
512 return -ENOMEM;
513 if (strlen(name) == 8 &&
514 !strncmp(name, "adaptive", 8)) {
Jaegeuk Kim52763a42016-06-13 09:47:48 -0700515 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700516 } else if (strlen(name) == 3 &&
517 !strncmp(name, "lfs", 3)) {
Jaegeuk Kim52763a42016-06-13 09:47:48 -0700518 set_opt_mode(sbi, F2FS_MOUNT_LFS);
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700519 } else {
520 kfree(name);
521 return -EINVAL;
522 }
523 kfree(name);
524 break;
Jaegeuk Kim73faec42016-04-29 15:34:32 -0700525 case Opt_fault_injection:
526 if (args->from && match_int(args, &arg))
527 return -EINVAL;
528#ifdef CONFIG_F2FS_FAULT_INJECTION
Chao Yu1ecc0c52016-09-23 21:30:09 +0800529 f2fs_build_fault_attr(sbi, arg);
Jaegeuk Kim73faec42016-04-29 15:34:32 -0700530#else
531 f2fs_msg(sb, KERN_INFO,
532 "FAULT_INJECTION was not selected");
533#endif
534 break;
Jaegeuk Kim6d94c742016-05-20 21:47:24 -0700535 case Opt_lazytime:
536 sb->s_flags |= MS_LAZYTIME;
537 break;
538 case Opt_nolazytime:
539 sb->s_flags &= ~MS_LAZYTIME;
540 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900541 default:
542 f2fs_msg(sb, KERN_ERR,
543 "Unrecognized mount option \"%s\" or missing value",
544 p);
545 return -EINVAL;
546 }
547 }
548 return 0;
549}
550
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900551static struct inode *f2fs_alloc_inode(struct super_block *sb)
552{
553 struct f2fs_inode_info *fi;
554
Chao Yua0acdfe2013-12-05 09:54:00 +0800555 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900556 if (!fi)
557 return NULL;
558
559 init_once((void *) fi);
560
Masanari Iida434720f2013-03-19 08:03:35 +0900561 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900562 fi->vfs_inode.i_version = 1;
Jaegeuk Kima43e1c42016-12-02 15:11:32 -0800563 atomic_set(&fi->dirty_pages, 0);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900564 fi->i_current_depth = 1;
565 fi->i_advise = 0;
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900566 init_rwsem(&fi->i_sem);
Chao Yu2710fd72015-12-15 13:30:45 +0800567 INIT_LIST_HEAD(&fi->dirty_list);
Jaegeuk Kim0f18b462016-05-20 11:10:10 -0700568 INIT_LIST_HEAD(&fi->gdirty_list);
Jaegeuk Kim88b88a62014-10-06 17:39:50 -0700569 INIT_LIST_HEAD(&fi->inmem_pages);
570 mutex_init(&fi->inmem_lock);
Chao Yu82e0a5a2016-07-13 09:18:29 +0800571 init_rwsem(&fi->dio_rwsem[READ]);
572 init_rwsem(&fi->dio_rwsem[WRITE]);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900573
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900574 /* Will be used by directory only */
575 fi->i_dir_level = F2FS_SB(sb)->dir_level;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900576 return &fi->vfs_inode;
577}
578
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900579static int f2fs_drop_inode(struct inode *inode)
580{
581 /*
582 * This is to avoid a deadlock condition like below.
583 * writeback_single_inode(inode)
584 * - f2fs_write_data_page
585 * - f2fs_gc -> iput -> evict
586 * - inode_wait_for_writeback(inode)
587 */
Jaegeuk Kim0f18b462016-05-20 11:10:10 -0700588 if ((!inode_unhashed(inode) && inode->i_state & I_SYNC)) {
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700589 if (!inode->i_nlink && !is_bad_inode(inode)) {
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700590 /* to avoid evict_inode call simultaneously */
591 atomic_inc(&inode->i_count);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700592 spin_unlock(&inode->i_lock);
593
594 /* some remained atomic pages should discarded */
595 if (f2fs_is_atomic_file(inode))
Chao Yu29b96b52016-02-06 14:38:29 +0800596 drop_inmem_pages(inode);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700597
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700598 /* should remain fi->extent_tree for writepage */
599 f2fs_destroy_extent_node(inode);
600
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700601 sb_start_intwrite(inode->i_sb);
Jaegeuk Kimfc9581c2016-05-20 09:22:03 -0700602 f2fs_i_size_write(inode, 0);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700603
604 if (F2FS_HAS_BLOCKS(inode))
Jaegeuk Kim9a449e92016-06-02 13:49:38 -0700605 f2fs_truncate(inode);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700606
607 sb_end_intwrite(inode->i_sb);
608
Jaegeuk Kim0b81d072015-05-15 16:26:10 -0700609 fscrypt_put_encryption_info(inode, NULL);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700610 spin_lock(&inode->i_lock);
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700611 atomic_dec(&inode->i_count);
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700612 }
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900613 return 0;
Jaegeuk Kim06e1bc02015-05-13 14:35:14 -0700614 }
Jaegeuk Kim0f18b462016-05-20 11:10:10 -0700615
Jaegeuk Kim67c37582016-06-13 18:27:02 -0700616 return generic_drop_inode(inode);
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900617}
618
Jaegeuk Kimb56ab832016-06-30 19:09:37 -0700619int f2fs_inode_dirtied(struct inode *inode)
620{
621 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
622
623 spin_lock(&sbi->inode_lock[DIRTY_META]);
624 if (is_inode_flag_set(inode, FI_DIRTY_INODE)) {
625 spin_unlock(&sbi->inode_lock[DIRTY_META]);
626 return 1;
627 }
628
629 set_inode_flag(inode, FI_DIRTY_INODE);
630 list_add_tail(&F2FS_I(inode)->gdirty_list,
631 &sbi->inode_list[DIRTY_META]);
632 inc_page_count(sbi, F2FS_DIRTY_IMETA);
633 stat_inc_dirty_inode(sbi, DIRTY_META);
634 spin_unlock(&sbi->inode_lock[DIRTY_META]);
635
636 return 0;
637}
638
639void f2fs_inode_synced(struct inode *inode)
640{
641 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
642
643 spin_lock(&sbi->inode_lock[DIRTY_META]);
644 if (!is_inode_flag_set(inode, FI_DIRTY_INODE)) {
645 spin_unlock(&sbi->inode_lock[DIRTY_META]);
646 return;
647 }
648 list_del_init(&F2FS_I(inode)->gdirty_list);
649 clear_inode_flag(inode, FI_DIRTY_INODE);
650 clear_inode_flag(inode, FI_AUTO_RECOVER);
651 dec_page_count(sbi, F2FS_DIRTY_IMETA);
652 stat_dec_dirty_inode(F2FS_I_SB(inode), DIRTY_META);
653 spin_unlock(&sbi->inode_lock[DIRTY_META]);
654}
655
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900656/*
657 * f2fs_dirty_inode() is called from __mark_inode_dirty()
658 *
659 * We should call set_dirty_inode to write the dirty inode through write_inode.
660 */
661static void f2fs_dirty_inode(struct inode *inode, int flags)
662{
Jaegeuk Kim0f18b462016-05-20 11:10:10 -0700663 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
664
665 if (inode->i_ino == F2FS_NODE_INO(sbi) ||
666 inode->i_ino == F2FS_META_INO(sbi))
667 return;
668
Jaegeuk Kim6d94c742016-05-20 21:47:24 -0700669 if (flags == I_DIRTY_TIME)
670 return;
671
Jaegeuk Kim26de9b12016-05-20 20:42:37 -0700672 if (is_inode_flag_set(inode, FI_AUTO_RECOVER))
673 clear_inode_flag(inode, FI_AUTO_RECOVER);
674
Jaegeuk Kimb56ab832016-06-30 19:09:37 -0700675 f2fs_inode_dirtied(inode);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900676}
677
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900678static void f2fs_i_callback(struct rcu_head *head)
679{
680 struct inode *inode = container_of(head, struct inode, i_rcu);
681 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
682}
683
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900684static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900685{
686 call_rcu(&inode->i_rcu, f2fs_i_callback);
687}
688
Jaegeuk Kim523be8a2016-05-13 12:36:58 -0700689static void destroy_percpu_info(struct f2fs_sb_info *sbi)
690{
Jaegeuk Kim41382ec2016-05-16 11:06:50 -0700691 percpu_counter_destroy(&sbi->alloc_valid_block_count);
Jaegeuk Kim513c5f32016-05-16 11:42:32 -0700692 percpu_counter_destroy(&sbi->total_valid_inode_count);
Jaegeuk Kim523be8a2016-05-13 12:36:58 -0700693}
694
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900695static void f2fs_put_super(struct super_block *sb)
696{
697 struct f2fs_sb_info *sbi = F2FS_SB(sb);
698
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900699 if (sbi->s_proc) {
700 remove_proc_entry("segment_info", sbi->s_proc);
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -0700701 remove_proc_entry("segment_bits", sbi->s_proc);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900702 remove_proc_entry(sb->s_id, f2fs_proc_root);
703 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900704 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900705
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900706 stop_gc_thread(sbi);
707
Jaegeuk Kim2658e502015-06-19 12:01:21 -0700708 /* prevent remaining shrinker jobs */
709 mutex_lock(&sbi->umount_mutex);
710
Jaegeuk Kim85dc2f22015-01-14 17:41:41 -0800711 /*
712 * We don't need to do checkpoint when superblock is clean.
713 * But, the previous checkpoint was not done by umount, it needs to do
714 * clean checkpoint again.
715 */
Chao Yucaf00472015-01-28 17:48:42 +0800716 if (is_sbi_flag_set(sbi, SBI_IS_DIRTY) ||
Chao Yuaaec2b12016-09-20 11:04:18 +0800717 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
Jaegeuk Kim75ab4cb2014-09-20 21:57:51 -0700718 struct cp_control cpc = {
719 .reason = CP_UMOUNT,
720 };
721 write_checkpoint(sbi, &cpc);
722 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900723
Jaegeuk Kimeca616f2015-06-15 14:52:29 -0700724 /* write_checkpoint can update stat informaion */
725 f2fs_destroy_stats(sbi);
726
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700727 /*
728 * normally superblock is clean, so we need to release this.
729 * In addition, EIO will skip do checkpoint, we need this as well.
730 */
Jaegeuk Kim74ef9242016-05-02 22:09:56 -0700731 release_ino_entry(sbi, true);
Jaegeuk Kim4b2fecc2014-09-20 22:06:39 -0700732 release_discard_addrs(sbi);
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700733
Jaegeuk Kim2658e502015-06-19 12:01:21 -0700734 f2fs_leave_shrinker(sbi);
735 mutex_unlock(&sbi->umount_mutex);
736
Jaegeuk Kim17c19122016-01-29 08:57:59 -0800737 /* our cp_error case, we can wait for any writeback page */
Jaegeuk Kimf5730182016-05-17 16:23:36 -0700738 f2fs_flush_merged_bios(sbi);
Jaegeuk Kim17c19122016-01-29 08:57:59 -0800739
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900740 iput(sbi->node_inode);
741 iput(sbi->meta_inode);
742
743 /* destroy f2fs internal modules */
744 destroy_node_manager(sbi);
745 destroy_segment_manager(sbi);
746
747 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900748 kobject_put(&sbi->s_kobj);
749 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900750
751 sb->s_fs_info = NULL;
Keith Mok43b65732016-03-02 12:04:24 -0800752 if (sbi->s_chksum_driver)
753 crypto_free_shash(sbi->s_chksum_driver);
Yunlei Heb39f0de2015-12-15 17:17:20 +0800754 kfree(sbi->raw_super);
Jaegeuk Kim523be8a2016-05-13 12:36:58 -0700755
756 destroy_percpu_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900757 kfree(sbi);
758}
759
760int f2fs_sync_fs(struct super_block *sb, int sync)
761{
762 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chao Yuc34f42e2015-12-23 17:50:30 +0800763 int err = 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900764
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900765 trace_f2fs_sync_fs(sb, sync);
766
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900767 if (sync) {
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700768 struct cp_control cpc;
769
Jaegeuk Kim119ee912015-01-29 11:45:33 -0800770 cpc.reason = __get_cp_reason(sbi);
771
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900772 mutex_lock(&sbi->gc_mutex);
Chao Yuc34f42e2015-12-23 17:50:30 +0800773 err = write_checkpoint(sbi, &cpc);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900774 mutex_unlock(&sbi->gc_mutex);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900775 }
Jaegeuk Kim05ca3632015-04-23 14:38:15 -0700776 f2fs_trace_ios(NULL, 1);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900777
Chao Yuc34f42e2015-12-23 17:50:30 +0800778 return err;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900779}
780
Changman Leed6212a52013-01-29 18:30:07 +0900781static int f2fs_freeze(struct super_block *sb)
782{
783 int err;
784
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900785 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900786 return 0;
787
788 err = f2fs_sync_fs(sb, 1);
789 return err;
790}
791
792static int f2fs_unfreeze(struct super_block *sb)
793{
794 return 0;
795}
796
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900797static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
798{
799 struct super_block *sb = dentry->d_sb;
800 struct f2fs_sb_info *sbi = F2FS_SB(sb);
801 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
802 block_t total_count, user_block_count, start_count, ovp_count;
803
804 total_count = le64_to_cpu(sbi->raw_super->block_count);
805 user_block_count = sbi->user_block_count;
806 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
807 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
808 buf->f_type = F2FS_SUPER_MAGIC;
809 buf->f_bsize = sbi->blocksize;
810
811 buf->f_blocks = total_count - start_count;
Chao Yu3e6d0b42016-07-06 14:13:07 +0800812 buf->f_bfree = user_block_count - valid_user_blocks(sbi) + ovp_count;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900813 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
814
Chao Yuc200b1a2014-08-20 18:36:46 +0800815 buf->f_files = sbi->total_node_count - F2FS_RESERVED_NODE_NUM;
816 buf->f_ffree = buf->f_files - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900817
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900818 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900819 buf->f_fsid.val[0] = (u32)id;
820 buf->f_fsid.val[1] = (u32)(id >> 32);
821
822 return 0;
823}
824
825static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
826{
827 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
828
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700829 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC)) {
830 if (test_opt(sbi, FORCE_FG_GC))
831 seq_printf(seq, ",background_gc=%s", "sync");
832 else
833 seq_printf(seq, ",background_gc=%s", "on");
834 } else {
Namjae Jeon696c0182013-06-16 09:48:48 +0900835 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kim6aefd932015-10-05 11:02:54 -0700836 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900837 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
838 seq_puts(seq, ",disable_roll_forward");
839 if (test_opt(sbi, DISCARD))
840 seq_puts(seq, ",discard");
841 if (test_opt(sbi, NOHEAP))
842 seq_puts(seq, ",no_heap_alloc");
843#ifdef CONFIG_F2FS_FS_XATTR
844 if (test_opt(sbi, XATTR_USER))
845 seq_puts(seq, ",user_xattr");
846 else
847 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900848 if (test_opt(sbi, INLINE_XATTR))
849 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900850#endif
851#ifdef CONFIG_F2FS_FS_POSIX_ACL
852 if (test_opt(sbi, POSIX_ACL))
853 seq_puts(seq, ",acl");
854 else
855 seq_puts(seq, ",noacl");
856#endif
857 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100858 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800859 if (test_opt(sbi, INLINE_DATA))
860 seq_puts(seq, ",inline_data");
Wanpeng Li75342792015-03-24 10:20:27 +0800861 else
862 seq_puts(seq, ",noinline_data");
Chao Yu5efd3c62014-09-24 18:16:13 +0800863 if (test_opt(sbi, INLINE_DENTRY))
864 seq_puts(seq, ",inline_dentry");
Chao Yu97c17942016-05-09 19:56:34 +0800865 else
866 seq_puts(seq, ",noinline_dentry");
Gu Zhengb270ad62014-04-11 17:49:55 +0800867 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900868 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700869 if (test_opt(sbi, NOBARRIER))
870 seq_puts(seq, ",nobarrier");
Jaegeuk Kimd5053a342014-10-30 22:47:03 -0700871 if (test_opt(sbi, FASTBOOT))
872 seq_puts(seq, ",fastboot");
Chao Yu89672152015-02-05 17:55:51 +0800873 if (test_opt(sbi, EXTENT_CACHE))
874 seq_puts(seq, ",extent_cache");
Jaegeuk Kim7daaea22015-06-25 17:43:04 -0700875 else
876 seq_puts(seq, ",noextent_cache");
Chao Yu343f40f2015-12-16 13:12:16 +0800877 if (test_opt(sbi, DATA_FLUSH))
878 seq_puts(seq, ",data_flush");
Jaegeuk Kim36abef42016-06-03 19:29:38 -0700879
880 seq_puts(seq, ",mode=");
881 if (test_opt(sbi, ADAPTIVE))
882 seq_puts(seq, "adaptive");
883 else if (test_opt(sbi, LFS))
884 seq_puts(seq, "lfs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900885 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
886
887 return 0;
888}
889
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900890static int segment_info_seq_show(struct seq_file *seq, void *offset)
891{
892 struct super_block *sb = seq->private;
893 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600894 unsigned int total_segs =
895 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900896 int i;
897
Chao Yu90aa6dc2014-03-17 10:31:06 +0800898 seq_puts(seq, "format: segment_type|valid_blocks\n"
899 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
900
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900901 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800902 struct seg_entry *se = get_seg_entry(sbi, i);
903
904 if ((i % 10) == 0)
Yunlei He01a5ad82015-08-31 17:15:10 +0800905 seq_printf(seq, "%-10d", i);
Chao Yu90aa6dc2014-03-17 10:31:06 +0800906 seq_printf(seq, "%d|%-3u", se->type,
907 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800908 if ((i % 10) == 9 || i == (total_segs - 1))
909 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900910 else
Gu Zheng46c04362014-03-07 18:43:33 +0800911 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900912 }
Gu Zheng46c04362014-03-07 18:43:33 +0800913
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900914 return 0;
915}
916
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -0700917static int segment_bits_seq_show(struct seq_file *seq, void *offset)
918{
919 struct super_block *sb = seq->private;
920 struct f2fs_sb_info *sbi = F2FS_SB(sb);
921 unsigned int total_segs =
922 le32_to_cpu(sbi->raw_super->segment_count_main);
923 int i, j;
924
925 seq_puts(seq, "format: segment_type|valid_blocks|bitmaps\n"
926 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
927
928 for (i = 0; i < total_segs; i++) {
929 struct seg_entry *se = get_seg_entry(sbi, i);
930
931 seq_printf(seq, "%-10d", i);
932 seq_printf(seq, "%d|%-3u|", se->type,
933 get_valid_blocks(sbi, i, 1));
934 for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
Chao Yud32853d2016-09-23 13:24:56 +0800935 seq_printf(seq, " %.2x", se->cur_valid_map[j]);
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -0700936 seq_putc(seq, '\n');
937 }
938 return 0;
939}
940
Jaegeuk Kimb7a15f32016-04-27 16:07:56 -0700941#define F2FS_PROC_FILE_DEF(_name) \
942static int _name##_open_fs(struct inode *inode, struct file *file) \
943{ \
944 return single_open(file, _name##_seq_show, PDE_DATA(inode)); \
945} \
946 \
947static const struct file_operations f2fs_seq_##_name##_fops = { \
Jaegeuk Kimb7a15f32016-04-27 16:07:56 -0700948 .open = _name##_open_fs, \
949 .read = seq_read, \
950 .llseek = seq_lseek, \
951 .release = single_release, \
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900952};
953
Jaegeuk Kimb7a15f32016-04-27 16:07:56 -0700954F2FS_PROC_FILE_DEF(segment_info);
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -0700955F2FS_PROC_FILE_DEF(segment_bits);
Jaegeuk Kimb7a15f32016-04-27 16:07:56 -0700956
Yunlei He498c5e92015-05-07 18:11:37 +0800957static void default_options(struct f2fs_sb_info *sbi)
958{
959 /* init some FS parameters */
960 sbi->active_logs = NR_CURSEG_TYPE;
961
962 set_opt(sbi, BG_GC);
963 set_opt(sbi, INLINE_DATA);
Chao Yu97c17942016-05-09 19:56:34 +0800964 set_opt(sbi, INLINE_DENTRY);
Jaegeuk Kim3e72f722015-06-19 17:53:26 -0700965 set_opt(sbi, EXTENT_CACHE);
Jaegeuk Kim6d94c742016-05-20 21:47:24 -0700966 sbi->sb->s_flags |= MS_LAZYTIME;
Jaegeuk Kim69e9e422016-05-20 22:39:20 -0700967 set_opt(sbi, FLUSH_MERGE);
Jaegeuk Kim52763a42016-06-13 09:47:48 -0700968 if (f2fs_sb_mounted_hmsmr(sbi->sb)) {
969 set_opt_mode(sbi, F2FS_MOUNT_LFS);
970 set_opt(sbi, DISCARD);
971 } else {
972 set_opt_mode(sbi, F2FS_MOUNT_ADAPTIVE);
973 }
Yunlei He498c5e92015-05-07 18:11:37 +0800974
975#ifdef CONFIG_F2FS_FS_XATTR
976 set_opt(sbi, XATTR_USER);
977#endif
978#ifdef CONFIG_F2FS_FS_POSIX_ACL
979 set_opt(sbi, POSIX_ACL);
980#endif
Chao Yu36dbd322016-09-26 19:45:05 +0800981
982#ifdef CONFIG_F2FS_FAULT_INJECTION
983 f2fs_build_fault_attr(sbi, 0);
984#endif
Yunlei He498c5e92015-05-07 18:11:37 +0800985}
986
Namjae Jeon696c0182013-06-16 09:48:48 +0900987static int f2fs_remount(struct super_block *sb, int *flags, char *data)
988{
989 struct f2fs_sb_info *sbi = F2FS_SB(sb);
990 struct f2fs_mount_info org_mount_opt;
991 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800992 bool need_restart_gc = false;
993 bool need_stop_gc = false;
Chao Yu9cd81ce2015-09-18 16:55:26 +0800994 bool no_extent_cache = !test_opt(sbi, EXTENT_CACHE);
Chao Yu2443b8b2016-09-26 19:45:06 +0800995#ifdef CONFIG_F2FS_FAULT_INJECTION
996 struct f2fs_fault_info ffi = sbi->fault_info;
997#endif
Namjae Jeon696c0182013-06-16 09:48:48 +0900998
999 /*
1000 * Save the old mount options in case we
1001 * need to restore them.
1002 */
1003 org_mount_opt = sbi->mount_opt;
1004 active_logs = sbi->active_logs;
1005
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001006 /* recover superblocks we couldn't write due to previous RO mount */
1007 if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
1008 err = f2fs_commit_super(sbi, false);
1009 f2fs_msg(sb, KERN_INFO,
1010 "Try to recover all the superblocks, ret: %d", err);
1011 if (!err)
1012 clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
1013 }
1014
Chao Yu26666c82014-09-15 18:04:44 +08001015 sbi->mount_opt.opt = 0;
Yunlei He498c5e92015-05-07 18:11:37 +08001016 default_options(sbi);
Chao Yu26666c82014-09-15 18:04:44 +08001017
Namjae Jeon696c0182013-06-16 09:48:48 +09001018 /* parse mount options */
1019 err = parse_options(sb, data);
1020 if (err)
1021 goto restore_opts;
1022
1023 /*
1024 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +08001025 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +09001026 */
Chao Yu6b2920a2014-07-07 11:21:59 +08001027 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +09001028 goto skip;
1029
Chao Yu9cd81ce2015-09-18 16:55:26 +08001030 /* disallow enable/disable extent_cache dynamically */
1031 if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
1032 err = -EINVAL;
1033 f2fs_msg(sbi->sb, KERN_WARNING,
1034 "switch extent_cache option is not allowed");
1035 goto restore_opts;
1036 }
1037
Namjae Jeon696c0182013-06-16 09:48:48 +09001038 /*
1039 * We stop the GC thread if FS is mounted as RO
1040 * or if background_gc = off is passed in mount
1041 * option. Also sync the filesystem.
1042 */
1043 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
1044 if (sbi->gc_thread) {
1045 stop_gc_thread(sbi);
Gu Zheng876dc592014-04-11 17:50:00 +08001046 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +09001047 }
Chao Yuaba291b2014-11-18 11:17:20 +08001048 } else if (!sbi->gc_thread) {
Namjae Jeon696c0182013-06-16 09:48:48 +09001049 err = start_gc_thread(sbi);
1050 if (err)
1051 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +08001052 need_stop_gc = true;
1053 }
1054
Jaegeuk Kimfaa0e552016-03-24 10:29:39 -07001055 if (*flags & MS_RDONLY) {
1056 writeback_inodes_sb(sb, WB_REASON_SYNC);
1057 sync_inodes_sb(sb);
1058
1059 set_sbi_flag(sbi, SBI_IS_DIRTY);
1060 set_sbi_flag(sbi, SBI_IS_CLOSE);
1061 f2fs_sync_fs(sb, 1);
1062 clear_sbi_flag(sbi, SBI_IS_CLOSE);
1063 }
1064
Gu Zheng876dc592014-04-11 17:50:00 +08001065 /*
1066 * We stop issue flush thread if FS is mounted as RO
1067 * or if flush_merge is not passed in mount option.
1068 */
1069 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +08001070 destroy_flush_cmd_control(sbi);
Chao Yuaba291b2014-11-18 11:17:20 +08001071 } else if (!SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +08001072 err = create_flush_cmd_control(sbi);
1073 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +08001074 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +09001075 }
1076skip:
1077 /* Update the POSIXACL Flag */
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001078 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
Namjae Jeon696c0182013-06-16 09:48:48 +09001079 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001080
Namjae Jeon696c0182013-06-16 09:48:48 +09001081 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +08001082restore_gc:
1083 if (need_restart_gc) {
1084 if (start_gc_thread(sbi))
1085 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +09001086 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +08001087 } else if (need_stop_gc) {
1088 stop_gc_thread(sbi);
1089 }
Namjae Jeon696c0182013-06-16 09:48:48 +09001090restore_opts:
1091 sbi->mount_opt = org_mount_opt;
1092 sbi->active_logs = active_logs;
Chao Yu2443b8b2016-09-26 19:45:06 +08001093#ifdef CONFIG_F2FS_FAULT_INJECTION
1094 sbi->fault_info = ffi;
1095#endif
Namjae Jeon696c0182013-06-16 09:48:48 +09001096 return err;
1097}
1098
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001099static struct super_operations f2fs_sops = {
1100 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +09001101 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001102 .destroy_inode = f2fs_destroy_inode,
1103 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +09001104 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001105 .show_options = f2fs_show_options,
1106 .evict_inode = f2fs_evict_inode,
1107 .put_super = f2fs_put_super,
1108 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +09001109 .freeze_fs = f2fs_freeze,
1110 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001111 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +09001112 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001113};
1114
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001115#ifdef CONFIG_F2FS_FS_ENCRYPTION
1116static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
1117{
1118 return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1119 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1120 ctx, len, NULL);
1121}
1122
Jaegeuk Kimb5a7aef2016-05-04 22:05:01 -07001123static int f2fs_key_prefix(struct inode *inode, u8 **key)
1124{
1125 *key = F2FS_I_SB(inode)->key_prefix;
1126 return F2FS_I_SB(inode)->key_prefix_size;
1127}
1128
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001129static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
1130 void *fs_data)
1131{
1132 return f2fs_setxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
1133 F2FS_XATTR_NAME_ENCRYPTION_CONTEXT,
1134 ctx, len, fs_data, XATTR_CREATE);
1135}
1136
1137static unsigned f2fs_max_namelen(struct inode *inode)
1138{
1139 return S_ISLNK(inode->i_mode) ?
1140 inode->i_sb->s_blocksize : F2FS_NAME_LEN;
1141}
1142
1143static struct fscrypt_operations f2fs_cryptops = {
1144 .get_context = f2fs_get_context,
Jaegeuk Kimb5a7aef2016-05-04 22:05:01 -07001145 .key_prefix = f2fs_key_prefix,
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001146 .set_context = f2fs_set_context,
1147 .is_encrypted = f2fs_encrypted_inode,
1148 .empty_dir = f2fs_empty_dir,
1149 .max_namelen = f2fs_max_namelen,
1150};
1151#else
1152static struct fscrypt_operations f2fs_cryptops = {
1153 .is_encrypted = f2fs_encrypted_inode,
1154};
1155#endif
1156
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001157static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
1158 u64 ino, u32 generation)
1159{
1160 struct f2fs_sb_info *sbi = F2FS_SB(sb);
1161 struct inode *inode;
1162
Chao Yud6b7d4b2014-06-12 13:23:41 +08001163 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +08001164 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001165
1166 /*
1167 * f2fs_iget isn't quite right if the inode is currently unallocated!
1168 * However f2fs_iget currently does appropriate checks to handle stale
1169 * inodes so everything is OK.
1170 */
1171 inode = f2fs_iget(sb, ino);
1172 if (IS_ERR(inode))
1173 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001174 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001175 /* we didn't find the right inode.. */
1176 iput(inode);
1177 return ERR_PTR(-ESTALE);
1178 }
1179 return inode;
1180}
1181
1182static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
1183 int fh_len, int fh_type)
1184{
1185 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
1186 f2fs_nfs_get_inode);
1187}
1188
1189static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
1190 int fh_len, int fh_type)
1191{
1192 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
1193 f2fs_nfs_get_inode);
1194}
1195
1196static const struct export_operations f2fs_export_ops = {
1197 .fh_to_dentry = f2fs_fh_to_dentry,
1198 .fh_to_parent = f2fs_fh_to_parent,
1199 .get_parent = f2fs_get_parent,
1200};
1201
Chao Yue0afc4d2015-12-31 14:35:37 +08001202static loff_t max_file_blocks(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001203{
Jaegeuk Kimde936532013-08-12 21:08:03 +09001204 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001205 loff_t leaf_count = ADDRS_PER_BLOCK;
1206
1207 /* two direct node blocks */
1208 result += (leaf_count * 2);
1209
1210 /* two indirect node blocks */
1211 leaf_count *= NIDS_PER_BLOCK;
1212 result += (leaf_count * 2);
1213
1214 /* one double indirect node block */
1215 leaf_count *= NIDS_PER_BLOCK;
1216 result += leaf_count;
1217
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001218 return result;
1219}
1220
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001221static int __f2fs_commit_super(struct buffer_head *bh,
1222 struct f2fs_super_block *super)
Chao Yu9a59b622015-12-15 09:58:18 +08001223{
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001224 lock_buffer(bh);
1225 if (super)
1226 memcpy(bh->b_data + F2FS_SUPER_OFFSET, super, sizeof(*super));
1227 set_buffer_uptodate(bh);
1228 set_buffer_dirty(bh);
1229 unlock_buffer(bh);
1230
1231 /* it's rare case, we can do fua all the time */
1232 return __sync_dirty_buffer(bh, WRITE_FLUSH_FUA);
1233}
1234
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001235static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001236 struct buffer_head *bh)
1237{
1238 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1239 (bh->b_data + F2FS_SUPER_OFFSET);
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001240 struct super_block *sb = sbi->sb;
Chao Yu9a59b622015-12-15 09:58:18 +08001241 u32 segment0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
1242 u32 cp_blkaddr = le32_to_cpu(raw_super->cp_blkaddr);
1243 u32 sit_blkaddr = le32_to_cpu(raw_super->sit_blkaddr);
1244 u32 nat_blkaddr = le32_to_cpu(raw_super->nat_blkaddr);
1245 u32 ssa_blkaddr = le32_to_cpu(raw_super->ssa_blkaddr);
1246 u32 main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
1247 u32 segment_count_ckpt = le32_to_cpu(raw_super->segment_count_ckpt);
1248 u32 segment_count_sit = le32_to_cpu(raw_super->segment_count_sit);
1249 u32 segment_count_nat = le32_to_cpu(raw_super->segment_count_nat);
1250 u32 segment_count_ssa = le32_to_cpu(raw_super->segment_count_ssa);
1251 u32 segment_count_main = le32_to_cpu(raw_super->segment_count_main);
1252 u32 segment_count = le32_to_cpu(raw_super->segment_count);
1253 u32 log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001254 u64 main_end_blkaddr = main_blkaddr +
1255 (segment_count_main << log_blocks_per_seg);
1256 u64 seg_end_blkaddr = segment0_blkaddr +
1257 (segment_count << log_blocks_per_seg);
Chao Yu9a59b622015-12-15 09:58:18 +08001258
1259 if (segment0_blkaddr != cp_blkaddr) {
1260 f2fs_msg(sb, KERN_INFO,
1261 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
1262 segment0_blkaddr, cp_blkaddr);
1263 return true;
1264 }
1265
1266 if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
1267 sit_blkaddr) {
1268 f2fs_msg(sb, KERN_INFO,
1269 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
1270 cp_blkaddr, sit_blkaddr,
1271 segment_count_ckpt << log_blocks_per_seg);
1272 return true;
1273 }
1274
1275 if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
1276 nat_blkaddr) {
1277 f2fs_msg(sb, KERN_INFO,
1278 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
1279 sit_blkaddr, nat_blkaddr,
1280 segment_count_sit << log_blocks_per_seg);
1281 return true;
1282 }
1283
1284 if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
1285 ssa_blkaddr) {
1286 f2fs_msg(sb, KERN_INFO,
1287 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
1288 nat_blkaddr, ssa_blkaddr,
1289 segment_count_nat << log_blocks_per_seg);
1290 return true;
1291 }
1292
1293 if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
1294 main_blkaddr) {
1295 f2fs_msg(sb, KERN_INFO,
1296 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
1297 ssa_blkaddr, main_blkaddr,
1298 segment_count_ssa << log_blocks_per_seg);
1299 return true;
1300 }
1301
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001302 if (main_end_blkaddr > seg_end_blkaddr) {
Chao Yu9a59b622015-12-15 09:58:18 +08001303 f2fs_msg(sb, KERN_INFO,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001304 "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
Chao Yu9a59b622015-12-15 09:58:18 +08001305 main_blkaddr,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001306 segment0_blkaddr +
1307 (segment_count << log_blocks_per_seg),
Chao Yu9a59b622015-12-15 09:58:18 +08001308 segment_count_main << log_blocks_per_seg);
1309 return true;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001310 } else if (main_end_blkaddr < seg_end_blkaddr) {
1311 int err = 0;
1312 char *res;
Chao Yu9a59b622015-12-15 09:58:18 +08001313
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001314 /* fix in-memory information all the time */
1315 raw_super->segment_count = cpu_to_le32((main_end_blkaddr -
1316 segment0_blkaddr) >> log_blocks_per_seg);
1317
1318 if (f2fs_readonly(sb) || bdev_read_only(sb->s_bdev)) {
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001319 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001320 res = "internally";
1321 } else {
1322 err = __f2fs_commit_super(bh, NULL);
1323 res = err ? "failed" : "done";
1324 }
1325 f2fs_msg(sb, KERN_INFO,
1326 "Fix alignment : %s, start(%u) end(%u) block(%u)",
1327 res, main_blkaddr,
1328 segment0_blkaddr +
1329 (segment_count << log_blocks_per_seg),
1330 segment_count_main << log_blocks_per_seg);
1331 if (err)
1332 return true;
1333 }
Chao Yu9a59b622015-12-15 09:58:18 +08001334 return false;
1335}
1336
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001337static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001338 struct buffer_head *bh)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001339{
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001340 struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
1341 (bh->b_data + F2FS_SUPER_OFFSET);
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001342 struct super_block *sb = sbi->sb;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001343 unsigned int blocksize;
1344
Namjae Jeona07ef782012-12-30 14:52:05 +09001345 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
1346 f2fs_msg(sb, KERN_INFO,
1347 "Magic Mismatch, valid(0x%x) - read(0x%x)",
1348 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001349 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001350 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001351
majianpeng5c9b4692013-02-01 19:07:57 +08001352 /* Currently, support only 4KB page cache size */
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001353 if (F2FS_BLKSIZE != PAGE_SIZE) {
majianpeng5c9b4692013-02-01 19:07:57 +08001354 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +08001355 "Invalid page_cache_size (%lu), supports only 4KB\n",
Kirill A. Shutemov09cbfea2016-04-01 15:29:47 +03001356 PAGE_SIZE);
majianpeng5c9b4692013-02-01 19:07:57 +08001357 return 1;
1358 }
1359
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001360 /* Currently, support only 4KB block size */
1361 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +08001362 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001363 f2fs_msg(sb, KERN_INFO,
1364 "Invalid blocksize (%u), supports only 4KB\n",
1365 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001366 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001367 }
majianpeng5c9b4692013-02-01 19:07:57 +08001368
Chao Yu9a59b622015-12-15 09:58:18 +08001369 /* check log blocks per segment */
1370 if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
1371 f2fs_msg(sb, KERN_INFO,
1372 "Invalid log blocks per segment (%u)\n",
1373 le32_to_cpu(raw_super->log_blocks_per_seg));
1374 return 1;
1375 }
1376
Chao Yu55cf9cb2014-09-15 18:01:10 +08001377 /* Currently, support 512/1024/2048/4096 bytes sector size */
1378 if (le32_to_cpu(raw_super->log_sectorsize) >
1379 F2FS_MAX_LOG_SECTOR_SIZE ||
1380 le32_to_cpu(raw_super->log_sectorsize) <
1381 F2FS_MIN_LOG_SECTOR_SIZE) {
1382 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
1383 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001384 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001385 }
Chao Yu55cf9cb2014-09-15 18:01:10 +08001386 if (le32_to_cpu(raw_super->log_sectors_per_block) +
1387 le32_to_cpu(raw_super->log_sectorsize) !=
1388 F2FS_MAX_LOG_SECTOR_SIZE) {
1389 f2fs_msg(sb, KERN_INFO,
1390 "Invalid log sectors per block(%u) log sectorsize(%u)",
1391 le32_to_cpu(raw_super->log_sectors_per_block),
1392 le32_to_cpu(raw_super->log_sectorsize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001393 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +09001394 }
Chao Yu9a59b622015-12-15 09:58:18 +08001395
1396 /* check reserved ino info */
1397 if (le32_to_cpu(raw_super->node_ino) != 1 ||
1398 le32_to_cpu(raw_super->meta_ino) != 2 ||
1399 le32_to_cpu(raw_super->root_ino) != 3) {
1400 f2fs_msg(sb, KERN_INFO,
1401 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
1402 le32_to_cpu(raw_super->node_ino),
1403 le32_to_cpu(raw_super->meta_ino),
1404 le32_to_cpu(raw_super->root_ino));
1405 return 1;
1406 }
1407
Jin Qian93862952017-04-25 16:28:48 -07001408 if (le32_to_cpu(raw_super->segment_count) > F2FS_MAX_SEGMENT) {
1409 f2fs_msg(sb, KERN_INFO,
1410 "Invalid segment count (%u)",
1411 le32_to_cpu(raw_super->segment_count));
1412 return 1;
1413 }
1414
Chao Yu9a59b622015-12-15 09:58:18 +08001415 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001416 if (sanity_check_area_boundary(sbi, bh))
Chao Yu9a59b622015-12-15 09:58:18 +08001417 return 1;
1418
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001419 return 0;
1420}
1421
Shawn Lin984ec632016-02-17 11:26:32 +08001422int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001423{
1424 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001425 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
1426 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jin Qian0f442c52017-05-15 10:45:08 -07001427 unsigned int main_segs, blocks_per_seg;
1428 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001429
1430 total = le32_to_cpu(raw_super->segment_count);
1431 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
1432 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
1433 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
1434 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
1435 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
1436
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001437 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001438 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001439
Jin Qian0f442c52017-05-15 10:45:08 -07001440 main_segs = le32_to_cpu(raw_super->segment_count_main);
1441 blocks_per_seg = sbi->blocks_per_seg;
1442
1443 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1444 if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs ||
1445 le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg)
1446 return 1;
1447 }
1448 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1449 if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs ||
1450 le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg)
1451 return 1;
1452 }
1453
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -07001454 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +09001455 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
1456 return 1;
1457 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001458 return 0;
1459}
1460
1461static void init_sb_info(struct f2fs_sb_info *sbi)
1462{
1463 struct f2fs_super_block *raw_super = sbi->raw_super;
Jaegeuk Kim725ba1a2016-10-20 19:09:57 -07001464 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001465
1466 sbi->log_sectors_per_block =
1467 le32_to_cpu(raw_super->log_sectors_per_block);
1468 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
1469 sbi->blocksize = 1 << sbi->log_blocksize;
1470 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
1471 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
1472 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
1473 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
1474 sbi->total_sections = le32_to_cpu(raw_super->section_count);
1475 sbi->total_node_count =
1476 (le32_to_cpu(raw_super->segment_count_nat) / 2)
1477 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
1478 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
1479 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
1480 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +09001481 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +09001482 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001483
Jaegeuk Kimab9fa662014-02-27 20:09:05 +09001484 sbi->dir_level = DEF_DIR_LEVEL;
Jaegeuk Kim6beceb52016-01-08 15:51:50 -08001485 sbi->interval_time[CP_TIME] = DEF_CP_INTERVAL;
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001486 sbi->interval_time[REQ_TIME] = DEF_IDLE_INTERVAL;
Chao Yucaf00472015-01-28 17:48:42 +08001487 clear_sbi_flag(sbi, SBI_NEED_FSCK);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001488
Jaegeuk Kim725ba1a2016-10-20 19:09:57 -07001489 for (i = 0; i < NR_COUNT_TYPE; i++)
1490 atomic_set(&sbi->nr_pages[i], 0);
1491
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001492 INIT_LIST_HEAD(&sbi->s_list);
1493 mutex_init(&sbi->umount_mutex);
Jaegeuk Kim7dfeaa32016-06-04 14:21:28 -07001494 mutex_init(&sbi->wio_mutex[NODE]);
1495 mutex_init(&sbi->wio_mutex[DATA]);
Chao Yuaaec2b12016-09-20 11:04:18 +08001496 spin_lock_init(&sbi->cp_lock);
Jaegeuk Kimb5a7aef2016-05-04 22:05:01 -07001497
1498#ifdef CONFIG_F2FS_FS_ENCRYPTION
1499 memcpy(sbi->key_prefix, F2FS_KEY_DESC_PREFIX,
1500 F2FS_KEY_DESC_PREFIX_SIZE);
1501 sbi->key_prefix_size = F2FS_KEY_DESC_PREFIX_SIZE;
1502#endif
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001503}
1504
Jaegeuk Kim523be8a2016-05-13 12:36:58 -07001505static int init_percpu_info(struct f2fs_sb_info *sbi)
1506{
Jaegeuk Kim725ba1a2016-10-20 19:09:57 -07001507 int err;
Jaegeuk Kim41382ec2016-05-16 11:06:50 -07001508
Jaegeuk Kim513c5f32016-05-16 11:42:32 -07001509 err = percpu_counter_init(&sbi->alloc_valid_block_count, 0, GFP_KERNEL);
1510 if (err)
1511 return err;
1512
1513 return percpu_counter_init(&sbi->total_valid_inode_count, 0,
Jaegeuk Kim41382ec2016-05-16 11:06:50 -07001514 GFP_KERNEL);
Jaegeuk Kim523be8a2016-05-13 12:36:58 -07001515}
1516
Gu Zheng9076a752013-10-14 18:47:11 +08001517/*
1518 * Read f2fs raw super block.
Shawn Lin2b39e902016-02-17 08:59:01 +08001519 * Because we have two copies of super block, so read both of them
1520 * to get the first valid one. If any one of them is broken, we pass
1521 * them recovery flag back to the caller.
Gu Zheng9076a752013-10-14 18:47:11 +08001522 */
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001523static int read_raw_super_block(struct f2fs_sb_info *sbi,
Gu Zheng9076a752013-10-14 18:47:11 +08001524 struct f2fs_super_block **raw_super,
Chao Yue8240f62015-12-15 17:19:26 +08001525 int *valid_super_block, int *recovery)
majianpeng14d7e9d2013-02-01 19:07:03 +08001526{
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001527 struct super_block *sb = sbi->sb;
Shawn Lin2b39e902016-02-17 08:59:01 +08001528 int block;
Chao Yue8240f62015-12-15 17:19:26 +08001529 struct buffer_head *bh;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001530 struct f2fs_super_block *super;
hujianyangda554e42015-05-21 14:42:53 +08001531 int err = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +08001532
Yunlei Heb39f0de2015-12-15 17:17:20 +08001533 super = kzalloc(sizeof(struct f2fs_super_block), GFP_KERNEL);
1534 if (!super)
1535 return -ENOMEM;
Shawn Lin2b39e902016-02-17 08:59:01 +08001536
1537 for (block = 0; block < 2; block++) {
1538 bh = sb_bread(sb, block);
1539 if (!bh) {
1540 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
Gu Zheng9076a752013-10-14 18:47:11 +08001541 block + 1);
Shawn Lin2b39e902016-02-17 08:59:01 +08001542 err = -EIO;
1543 continue;
1544 }
majianpeng14d7e9d2013-02-01 19:07:03 +08001545
Shawn Lin2b39e902016-02-17 08:59:01 +08001546 /* sanity checking of raw super */
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001547 if (sanity_check_raw_super(sbi, bh)) {
Shawn Lin2b39e902016-02-17 08:59:01 +08001548 f2fs_msg(sb, KERN_ERR,
1549 "Can't find valid F2FS filesystem in %dth superblock",
1550 block + 1);
1551 err = -EINVAL;
1552 brelse(bh);
1553 continue;
1554 }
1555
1556 if (!*raw_super) {
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001557 memcpy(super, bh->b_data + F2FS_SUPER_OFFSET,
1558 sizeof(*super));
Shawn Lin2b39e902016-02-17 08:59:01 +08001559 *valid_super_block = block;
1560 *raw_super = super;
1561 }
Chao Yue8240f62015-12-15 17:19:26 +08001562 brelse(bh);
Shawn Lin2b39e902016-02-17 08:59:01 +08001563 }
1564
1565 /* Fail to read any one of the superblocks*/
1566 if (err < 0)
hujianyangda554e42015-05-21 14:42:53 +08001567 *recovery = 1;
hujianyangda554e42015-05-21 14:42:53 +08001568
hujianyangda554e42015-05-21 14:42:53 +08001569 /* No valid superblock */
Shawn Lin2b39e902016-02-17 08:59:01 +08001570 if (!*raw_super)
Yunlei Heb39f0de2015-12-15 17:17:20 +08001571 kfree(super);
Shawn Lin2b39e902016-02-17 08:59:01 +08001572 else
1573 err = 0;
hujianyangda554e42015-05-21 14:42:53 +08001574
Shawn Lin2b39e902016-02-17 08:59:01 +08001575 return err;
majianpeng14d7e9d2013-02-01 19:07:03 +08001576}
1577
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001578int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover)
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001579{
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001580 struct buffer_head *bh;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001581 int err;
1582
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001583 if ((recover && f2fs_readonly(sbi->sb)) ||
1584 bdev_read_only(sbi->sb->s_bdev)) {
1585 set_sbi_flag(sbi, SBI_NEED_SB_WRITE);
Jaegeuk Kimf2353d72016-03-23 10:42:01 -07001586 return -EROFS;
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001587 }
Jaegeuk Kimf2353d72016-03-23 10:42:01 -07001588
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001589 /* write back-up superblock first */
1590 bh = sb_getblk(sbi->sb, sbi->valid_super_block ? 0: 1);
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001591 if (!bh)
1592 return -EIO;
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001593 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001594 brelse(bh);
Chao Yuc5bda1c2015-06-08 13:28:03 +08001595
1596 /* if we are in recovery path, skip writing valid superblock */
1597 if (recover || err)
Jaegeuk Kim5d909cd2015-12-07 10:16:58 -08001598 return err;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001599
Chao Yue8240f62015-12-15 17:19:26 +08001600 /* write current valid superblock */
Jaegeuk Kimfd694732016-03-20 15:33:20 -07001601 bh = sb_getblk(sbi->sb, sbi->valid_super_block);
1602 if (!bh)
1603 return -EIO;
1604 err = __f2fs_commit_super(bh, F2FS_RAW_SUPER(sbi));
1605 brelse(bh);
1606 return err;
Jaegeuk Kim26d815ad2015-04-20 18:49:51 -07001607}
1608
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001609static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
1610{
1611 struct f2fs_sb_info *sbi;
hujianyangda554e42015-05-21 14:42:53 +08001612 struct f2fs_super_block *raw_super;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001613 struct inode *root;
Sheng Yong99e3e852016-05-11 17:08:14 +08001614 int err;
Chao Yu2adc3502015-03-16 21:08:44 +08001615 bool retry = true, need_fsck = false;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001616 char *options = NULL;
Chao Yue8240f62015-12-15 17:19:26 +08001617 int recovery, i, valid_super_block;
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001618 struct curseg_info *seg_i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001619
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001620try_onemore:
hujianyangda554e42015-05-21 14:42:53 +08001621 err = -EINVAL;
1622 raw_super = NULL;
Chao Yue8240f62015-12-15 17:19:26 +08001623 valid_super_block = -1;
hujianyangda554e42015-05-21 14:42:53 +08001624 recovery = 0;
1625
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001626 /* allocate memory for f2fs-specific super block info */
1627 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
1628 if (!sbi)
1629 return -ENOMEM;
1630
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001631 sbi->sb = sb;
1632
Keith Mok43b65732016-03-02 12:04:24 -08001633 /* Load the checksum driver */
1634 sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
1635 if (IS_ERR(sbi->s_chksum_driver)) {
1636 f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
1637 err = PTR_ERR(sbi->s_chksum_driver);
1638 sbi->s_chksum_driver = NULL;
1639 goto free_sbi;
1640 }
1641
Namjae Jeonff9234a2013-01-12 14:41:13 +09001642 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001643 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001644 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001645 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +09001646 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001647
Jaegeuk Kimdf728b02016-03-23 17:05:27 -07001648 err = read_raw_super_block(sbi, &raw_super, &valid_super_block,
Chao Yue8240f62015-12-15 17:19:26 +08001649 &recovery);
Gu Zheng9076a752013-10-14 18:47:11 +08001650 if (err)
1651 goto free_sbi;
1652
Gu Zheng5fb08372013-06-07 14:16:53 +08001653 sb->s_fs_info = sbi;
Jaegeuk Kim52763a42016-06-13 09:47:48 -07001654 sbi->raw_super = raw_super;
1655
Yunlei He498c5e92015-05-07 18:11:37 +08001656 default_options(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001657 /* parse mount options */
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001658 options = kstrdup((const char *)data, GFP_KERNEL);
1659 if (data && !options) {
1660 err = -ENOMEM;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001661 goto free_sb_buf;
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001662 }
1663
1664 err = parse_options(sb, options);
1665 if (err)
1666 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001667
Chao Yue0afc4d2015-12-31 14:35:37 +08001668 sbi->max_file_blocks = max_file_blocks();
1669 sb->s_maxbytes = sbi->max_file_blocks <<
1670 le32_to_cpu(raw_super->log_blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001671 sb->s_max_links = F2FS_LINK_MAX;
1672 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1673
1674 sb->s_op = &f2fs_sops;
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07001675 sb->s_cop = &f2fs_cryptops;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001676 sb->s_xattr = f2fs_xattr_handlers;
1677 sb->s_export_op = &f2fs_export_ops;
1678 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001679 sb->s_time_gran = 1;
1680 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1681 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
1682 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
1683
1684 /* init f2fs-specific super block info */
Chao Yue8240f62015-12-15 17:19:26 +08001685 sbi->valid_super_block = valid_super_block;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001686 mutex_init(&sbi->gc_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001687 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +08001688 init_rwsem(&sbi->node_write);
Jaegeuk Kim315df832015-08-11 12:45:39 -07001689
1690 /* disallow all the data/node/meta page writes */
1691 set_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001692 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001693
Chao Yudf0f8dc2014-03-22 14:57:23 +08001694 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001695 sbi->read_io.sbi = sbi;
1696 sbi->read_io.bio = NULL;
1697 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +08001698 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +09001699 sbi->write_io[i].sbi = sbi;
1700 sbi->write_io[i].bio = NULL;
1701 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +09001702
Jaegeuk Kimb873b792016-08-04 11:38:25 -07001703 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +09001704 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001705 init_sb_info(sbi);
1706
Jaegeuk Kim523be8a2016-05-13 12:36:58 -07001707 err = init_percpu_info(sbi);
1708 if (err)
1709 goto free_options;
1710
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001711 /* get an inode for meta space */
1712 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
1713 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001714 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001715 err = PTR_ERR(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001716 goto free_options;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001717 }
1718
1719 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001720 if (err) {
1721 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001722 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +09001723 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001724
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001725 sbi->total_valid_node_count =
1726 le32_to_cpu(sbi->ckpt->valid_node_count);
Jaegeuk Kim513c5f32016-05-16 11:42:32 -07001727 percpu_counter_set(&sbi->total_valid_inode_count,
1728 le32_to_cpu(sbi->ckpt->valid_inode_count));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001729 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1730 sbi->total_valid_block_count =
1731 le64_to_cpu(sbi->ckpt->valid_block_count);
1732 sbi->last_valid_block_count = sbi->total_valid_block_count;
Jaegeuk Kim41382ec2016-05-16 11:06:50 -07001733
Chao Yuc227f912015-12-16 13:09:20 +08001734 for (i = 0; i < NR_INODE_TYPE; i++) {
1735 INIT_LIST_HEAD(&sbi->inode_list[i]);
1736 spin_lock_init(&sbi->inode_lock[i]);
1737 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001738
Chao Yu1dcc3362015-02-05 17:57:31 +08001739 init_extent_cache_info(sbi);
1740
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001741 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001742
1743 /* setup f2fs internal modules */
1744 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001745 if (err) {
1746 f2fs_msg(sb, KERN_ERR,
1747 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001748 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001749 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001750 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001751 if (err) {
1752 f2fs_msg(sb, KERN_ERR,
1753 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001754 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001755 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001756
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001757 /* For write statistics */
1758 if (sb->s_bdev->bd_part)
1759 sbi->sectors_written_start =
1760 (u64)part_stat_read(sb->s_bdev->bd_part, sectors[1]);
1761
1762 /* Read accumulated write IO statistics if exists */
1763 seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1764 if (__exist_node_summaries(sbi))
1765 sbi->kbytes_written =
Shuoran Liub2dde6f2016-03-29 18:00:15 +08001766 le64_to_cpu(seg_i->journal->info.kbytes_written);
Shuoran Liu8f1dbbb2016-01-27 09:57:30 +08001767
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001768 build_gc_manager(sbi);
1769
1770 /* get an inode for node space */
1771 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1772 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001773 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001774 err = PTR_ERR(sbi->node_inode);
1775 goto free_nm;
1776 }
1777
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001778 f2fs_join_shrinker(sbi);
1779
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001780 /* if there are nt orphan nodes free them */
Chao Yu8c14bfa2015-08-07 17:58:43 +08001781 err = recover_orphan_inodes(sbi);
1782 if (err)
1783 goto free_node_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001784
1785 /* read root inode and dentry */
1786 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1787 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001788 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001789 err = PTR_ERR(root);
1790 goto free_node_inode;
1791 }
Chao Yu8f99a942013-11-28 15:43:43 +08001792 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001793 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001794 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001795 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001796 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001797
1798 sb->s_root = d_make_root(root); /* allocate root dentry */
1799 if (!sb->s_root) {
1800 err = -ENOMEM;
1801 goto free_root_inode;
1802 }
1803
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001804 err = f2fs_build_stats(sbi);
1805 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001806 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001807
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001808 if (f2fs_proc_root)
1809 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1810
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -07001811 if (sbi->s_proc) {
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001812 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1813 &f2fs_seq_segment_info_fops, sb);
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -07001814 proc_create_data("segment_bits", S_IRUGO, sbi->s_proc,
1815 &f2fs_seq_segment_bits_fops, sb);
1816 }
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001817
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001818 sbi->s_kobj.kset = f2fs_kset;
1819 init_completion(&sbi->s_kobj_unregister);
1820 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1821 "%s", sb->s_id);
1822 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001823 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001824
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001825 /* recover fsynced data */
1826 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
Jaegeuk Kim081d78c2015-01-23 19:16:59 -08001827 /*
1828 * mount should be failed, when device has readonly mode, and
1829 * previous checkpoint was not done by clean system shutdown.
1830 */
1831 if (bdev_read_only(sb->s_bdev) &&
Chao Yuaaec2b12016-09-20 11:04:18 +08001832 !is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
Jaegeuk Kim081d78c2015-01-23 19:16:59 -08001833 err = -EROFS;
1834 goto free_kobj;
1835 }
Chao Yu2adc3502015-03-16 21:08:44 +08001836
1837 if (need_fsck)
1838 set_sbi_flag(sbi, SBI_NEED_FSCK);
1839
Jaegeuk Kima468f0e2016-09-19 17:55:10 -07001840 if (!retry)
1841 goto skip_recovery;
1842
Jaegeuk Kim6781eab2016-03-23 16:12:58 -07001843 err = recover_fsync_data(sbi, false);
1844 if (err < 0) {
Chao Yu2adc3502015-03-16 21:08:44 +08001845 need_fsck = true;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001846 f2fs_msg(sb, KERN_ERR,
Sheng Yong99e3e852016-05-11 17:08:14 +08001847 "Cannot recover all fsync data errno=%d", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001848 goto free_kobj;
1849 }
Jaegeuk Kim6781eab2016-03-23 16:12:58 -07001850 } else {
1851 err = recover_fsync_data(sbi, true);
1852
1853 if (!f2fs_readonly(sb) && err > 0) {
1854 err = -EINVAL;
1855 f2fs_msg(sb, KERN_ERR,
1856 "Need to recover fsync data");
1857 goto free_kobj;
1858 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001859 }
Jaegeuk Kima468f0e2016-09-19 17:55:10 -07001860skip_recovery:
Jaegeuk Kim315df832015-08-11 12:45:39 -07001861 /* recover_fsync_data() cleared this already */
1862 clear_sbi_flag(sbi, SBI_POR_DOING);
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001863
1864 /*
1865 * If filesystem is not mounted as read-only then
1866 * do start the gc_thread.
1867 */
Chao Yu6c029932014-11-18 11:16:01 +08001868 if (test_opt(sbi, BG_GC) && !f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001869 /* After POR, we can run background GC thread.*/
1870 err = start_gc_thread(sbi);
1871 if (err)
1872 goto free_kobj;
1873 }
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001874 kfree(options);
hujianyangda554e42015-05-21 14:42:53 +08001875
1876 /* recover broken superblock */
Jaegeuk Kimf2353d72016-03-23 10:42:01 -07001877 if (recovery) {
Chao Yu41214b32016-02-22 18:33:20 +08001878 err = f2fs_commit_super(sbi, true);
1879 f2fs_msg(sb, KERN_INFO,
Sheng Yong99e3e852016-05-11 17:08:14 +08001880 "Try to recover %dth superblock, ret: %d",
Chao Yu41214b32016-02-22 18:33:20 +08001881 sbi->valid_super_block ? 1 : 2, err);
hujianyangda554e42015-05-21 14:42:53 +08001882 }
1883
Jaegeuk Kim6beceb52016-01-08 15:51:50 -08001884 f2fs_update_time(sbi, CP_TIME);
Jaegeuk Kimd0239e12016-01-08 16:57:48 -08001885 f2fs_update_time(sbi, REQ_TIME);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001886 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001887
1888free_kobj:
Jaegeuk Kim0f18b462016-05-20 11:10:10 -07001889 f2fs_sync_inode_meta(sbi);
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001890 kobject_del(&sbi->s_kobj);
Chao Yu29ba1082015-11-16 20:38:25 +08001891 kobject_put(&sbi->s_kobj);
1892 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001893free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001894 if (sbi->s_proc) {
1895 remove_proc_entry("segment_info", sbi->s_proc);
Jaegeuk Kimf00d6fa2016-04-27 16:29:05 -07001896 remove_proc_entry("segment_bits", sbi->s_proc);
Chao Yu1d15bd22013-11-07 10:14:51 +08001897 remove_proc_entry(sb->s_id, f2fs_proc_root);
1898 }
1899 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001900free_root_inode:
1901 dput(sb->s_root);
1902 sb->s_root = NULL;
1903free_node_inode:
Jaegeuk Kimbb5dada2016-09-23 11:29:00 -07001904 truncate_inode_pages_final(NODE_MAPPING(sbi));
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001905 mutex_lock(&sbi->umount_mutex);
Jaegeuk Kimd41065e2016-09-21 11:39:42 -07001906 release_ino_entry(sbi, true);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001907 f2fs_leave_shrinker(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001908 iput(sbi->node_inode);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07001909 mutex_unlock(&sbi->umount_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001910free_nm:
1911 destroy_node_manager(sbi);
1912free_sm:
1913 destroy_segment_manager(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001914 kfree(sbi->ckpt);
1915free_meta_inode:
1916 make_bad_inode(sbi->meta_inode);
1917 iput(sbi->meta_inode);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001918free_options:
Jaegeuk Kim523be8a2016-05-13 12:36:58 -07001919 destroy_percpu_info(sbi);
Jaegeuk Kimdabc4a52015-01-23 17:41:39 -08001920 kfree(options);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001921free_sb_buf:
Yunlei Heb39f0de2015-12-15 17:17:20 +08001922 kfree(raw_super);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001923free_sbi:
Keith Mok43b65732016-03-02 12:04:24 -08001924 if (sbi->s_chksum_driver)
1925 crypto_free_shash(sbi->s_chksum_driver);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001926 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001927
1928 /* give only one another chance */
1929 if (retry) {
Taehee Yoo9df47ba2015-04-13 21:48:06 +09001930 retry = false;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001931 shrink_dcache_sb(sb);
1932 goto try_onemore;
1933 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001934 return err;
1935}
1936
1937static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1938 const char *dev_name, void *data)
1939{
1940 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1941}
1942
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001943static void kill_f2fs_super(struct super_block *sb)
1944{
1945 if (sb->s_root)
Chao Yucaf00472015-01-28 17:48:42 +08001946 set_sbi_flag(F2FS_SB(sb), SBI_IS_CLOSE);
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001947 kill_block_super(sb);
1948}
1949
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001950static struct file_system_type f2fs_fs_type = {
1951 .owner = THIS_MODULE,
1952 .name = "f2fs",
1953 .mount = f2fs_mount,
Jaegeuk Kim30a55372015-01-14 16:34:24 -08001954 .kill_sb = kill_f2fs_super,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001955 .fs_flags = FS_REQUIRES_DEV,
1956};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001957MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001958
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001959static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001960{
Vladimir Davydov5d097052016-01-14 15:18:21 -08001961 f2fs_inode_cachep = kmem_cache_create("f2fs_inode_cache",
1962 sizeof(struct f2fs_inode_info), 0,
1963 SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, NULL);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001964 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001965 return -ENOMEM;
1966 return 0;
1967}
1968
1969static void destroy_inodecache(void)
1970{
1971 /*
1972 * Make sure all delayed rcu free inodes are flushed before we
1973 * destroy cache.
1974 */
1975 rcu_barrier();
1976 kmem_cache_destroy(f2fs_inode_cachep);
1977}
1978
1979static int __init init_f2fs_fs(void)
1980{
1981 int err;
1982
Jaegeuk Kimc0508652015-01-07 14:07:36 -08001983 f2fs_build_trace_ios();
1984
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001985 err = init_inodecache();
1986 if (err)
1987 goto fail;
1988 err = create_node_manager_caches();
1989 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001990 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001991 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001992 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001993 goto free_node_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001994 err = create_checkpoint_caches();
1995 if (err)
Chao Yu06292072014-12-29 15:56:18 +08001996 goto free_segment_manager_caches;
Chao Yu1dcc3362015-02-05 17:57:31 +08001997 err = create_extent_cache();
1998 if (err)
1999 goto free_checkpoint_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09002000 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08002001 if (!f2fs_kset) {
2002 err = -ENOMEM;
Chao Yu1dcc3362015-02-05 17:57:31 +08002003 goto free_extent_cache;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08002004 }
Jaegeuk Kim2658e502015-06-19 12:01:21 -07002005 err = register_shrinker(&f2fs_shrinker_info);
Jaegeuk Kimcfc4d972015-05-15 15:37:24 -07002006 if (err)
Jaegeuk Kim0b81d072015-05-15 16:26:10 -07002007 goto free_kset;
Jaegeuk Kim2658e502015-06-19 12:01:21 -07002008
2009 err = register_filesystem(&f2fs_fs_type);
2010 if (err)
2011 goto free_shrinker;
Chao Yu787c7b8c2015-10-29 09:13:04 +08002012 err = f2fs_create_root_stats();
2013 if (err)
2014 goto free_filesystem;
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09002015 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08002016 return 0;
2017
Chao Yu787c7b8c2015-10-29 09:13:04 +08002018free_filesystem:
2019 unregister_filesystem(&f2fs_fs_type);
Jaegeuk Kim2658e502015-06-19 12:01:21 -07002020free_shrinker:
2021 unregister_shrinker(&f2fs_shrinker_info);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08002022free_kset:
2023 kset_unregister(f2fs_kset);
Chao Yu1dcc3362015-02-05 17:57:31 +08002024free_extent_cache:
2025 destroy_extent_cache();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08002026free_checkpoint_caches:
2027 destroy_checkpoint_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09002028free_segment_manager_caches:
2029 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08002030free_node_manager_caches:
2031 destroy_node_manager_caches();
2032free_inodecache:
2033 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002034fail:
2035 return err;
2036}
2037
2038static void __exit exit_f2fs_fs(void)
2039{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09002040 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09002041 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002042 unregister_filesystem(&f2fs_fs_type);
Tiezhu Yangb8bef792016-05-18 08:02:25 +08002043 unregister_shrinker(&f2fs_shrinker_info);
Tiezhu Yangb8bef792016-05-18 08:02:25 +08002044 kset_unregister(f2fs_kset);
Wanpeng Lifdf6c8b2015-03-06 15:00:54 +08002045 destroy_extent_cache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002046 destroy_checkpoint_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09002047 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002048 destroy_node_manager_caches();
2049 destroy_inodecache();
Jaegeuk Kim351f4fb2015-01-07 14:09:48 -08002050 f2fs_destroy_trace_ios();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09002051}
2052
2053module_init(init_f2fs_fs)
2054module_exit(exit_f2fs_fs)
2055
2056MODULE_AUTHOR("Samsung Electronics's Praesto Team");
2057MODULE_DESCRIPTION("Flash Friendly File System");
2058MODULE_LICENSE("GPL");