blob: ddb1e9d3636317ad69a415ae456a0a7759273794 [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 Kimaff063e2012-11-02 17:07:47 +090033
Namjae Jeona2a4a7e2013-04-20 01:28:40 +090034#define CREATE_TRACE_POINTS
35#include <trace/events/f2fs.h>
36
Jaegeuk Kim5e176d52013-06-28 12:47:01 +090037static struct proc_dir_entry *f2fs_proc_root;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090038static struct kmem_cache *f2fs_inode_cachep;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090039static struct kset *f2fs_kset;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090040
41enum {
Namjae Jeon696c0182013-06-16 09:48:48 +090042 Opt_gc_background,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090043 Opt_disable_roll_forward,
44 Opt_discard,
45 Opt_noheap,
Kelly Anderson4058c512013-10-07 11:36:20 +090046 Opt_user_xattr,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090047 Opt_nouser_xattr,
Kelly Anderson4058c512013-10-07 11:36:20 +090048 Opt_acl,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090049 Opt_noacl,
50 Opt_active_logs,
51 Opt_disable_ext_identify,
Jaegeuk Kim444c5802013-08-08 15:16:22 +090052 Opt_inline_xattr,
Huajun Li8274de72013-11-10 23:13:17 +080053 Opt_inline_data,
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090054 Opt_flush_merge,
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070055 Opt_nobarrier,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090056 Opt_err,
57};
58
59static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090060 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090061 {Opt_disable_roll_forward, "disable_roll_forward"},
62 {Opt_discard, "discard"},
63 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +090064 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090065 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +090066 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090067 {Opt_noacl, "noacl"},
68 {Opt_active_logs, "active_logs=%u"},
69 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +090070 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +080071 {Opt_inline_data, "inline_data"},
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +090072 {Opt_flush_merge, "flush_merge"},
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -070073 {Opt_nobarrier, "nobarrier"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090074 {Opt_err, NULL},
75};
76
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090077/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090078enum {
79 GC_THREAD, /* struct f2fs_gc_thread */
80 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +090081 NM_INFO, /* struct f2fs_nm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +090082 F2FS_SBI, /* struct f2fs_sb_info */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090083};
84
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090085struct f2fs_attr {
86 struct attribute attr;
87 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
88 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
89 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090090 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090091 int offset;
92};
93
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090094static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
95{
96 if (struct_type == GC_THREAD)
97 return (unsigned char *)sbi->gc_thread;
98 else if (struct_type == SM_INFO)
99 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900100 else if (struct_type == NM_INFO)
101 return (unsigned char *)NM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900102 else if (struct_type == F2FS_SBI)
103 return (unsigned char *)sbi;
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900104 return NULL;
105}
106
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900107static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
108 struct f2fs_sb_info *sbi, char *buf)
109{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900110 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900111 unsigned int *ui;
112
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900113 ptr = __struct_ptr(sbi, a->struct_type);
114 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900115 return -EINVAL;
116
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900117 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900118
119 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
120}
121
122static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
123 struct f2fs_sb_info *sbi,
124 const char *buf, size_t count)
125{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900126 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900127 unsigned long t;
128 unsigned int *ui;
129 ssize_t ret;
130
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900131 ptr = __struct_ptr(sbi, a->struct_type);
132 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900133 return -EINVAL;
134
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900135 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900136
137 ret = kstrtoul(skip_spaces(buf), 0, &t);
138 if (ret < 0)
139 return ret;
140 *ui = t;
141 return count;
142}
143
144static ssize_t f2fs_attr_show(struct kobject *kobj,
145 struct attribute *attr, char *buf)
146{
147 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
148 s_kobj);
149 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
150
151 return a->show ? a->show(a, sbi, buf) : 0;
152}
153
154static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
155 const char *buf, size_t len)
156{
157 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
158 s_kobj);
159 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
160
161 return a->store ? a->store(a, sbi, buf, len) : 0;
162}
163
164static void f2fs_sb_release(struct kobject *kobj)
165{
166 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
167 s_kobj);
168 complete(&sbi->s_kobj_unregister);
169}
170
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900171#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900172static struct f2fs_attr f2fs_attr_##_name = { \
173 .attr = {.name = __stringify(_name), .mode = _mode }, \
174 .show = _show, \
175 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900176 .struct_type = _struct_type, \
177 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900178}
179
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900180#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
181 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
182 f2fs_sbi_show, f2fs_sbi_store, \
183 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900184
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900185F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
186F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
187F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
188F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
189F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900190F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900191F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
192F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900193F2FS_RW_ATTR(NM_INFO, f2fs_nm_info, ram_thresh, ram_thresh);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900194F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900195F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, dir_level, dir_level);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900196
197#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
198static struct attribute *f2fs_attrs[] = {
199 ATTR_LIST(gc_min_sleep_time),
200 ATTR_LIST(gc_max_sleep_time),
201 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900202 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900203 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900204 ATTR_LIST(max_small_discards),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900205 ATTR_LIST(ipu_policy),
206 ATTR_LIST(min_ipu_util),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900207 ATTR_LIST(max_victim_search),
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900208 ATTR_LIST(dir_level),
Jaegeuk Kimcdfc41c2014-03-19 13:31:37 +0900209 ATTR_LIST(ram_thresh),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900210 NULL,
211};
212
213static const struct sysfs_ops f2fs_attr_ops = {
214 .show = f2fs_attr_show,
215 .store = f2fs_attr_store,
216};
217
218static struct kobj_type f2fs_ktype = {
219 .default_attrs = f2fs_attrs,
220 .sysfs_ops = &f2fs_attr_ops,
221 .release = f2fs_sb_release,
222};
223
Namjae Jeona07ef782012-12-30 14:52:05 +0900224void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
225{
226 struct va_format vaf;
227 va_list args;
228
229 va_start(args, fmt);
230 vaf.fmt = fmt;
231 vaf.va = &args;
232 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
233 va_end(args);
234}
235
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900236static void init_once(void *foo)
237{
238 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
239
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900240 inode_init_once(&fi->vfs_inode);
241}
242
Namjae Jeon696c0182013-06-16 09:48:48 +0900243static int parse_options(struct super_block *sb, char *options)
244{
245 struct f2fs_sb_info *sbi = F2FS_SB(sb);
246 substring_t args[MAX_OPT_ARGS];
247 char *p, *name;
248 int arg = 0;
249
250 if (!options)
251 return 0;
252
253 while ((p = strsep(&options, ",")) != NULL) {
254 int token;
255 if (!*p)
256 continue;
257 /*
258 * Initialize args struct so we know whether arg was
259 * found; some options take optional arguments.
260 */
261 args[0].to = args[0].from = NULL;
262 token = match_token(p, f2fs_tokens, args);
263
264 switch (token) {
265 case Opt_gc_background:
266 name = match_strdup(&args[0]);
267
268 if (!name)
269 return -ENOMEM;
Chao Yu04c09382014-03-18 09:07:59 +0800270 if (strlen(name) == 2 && !strncmp(name, "on", 2))
Namjae Jeon696c0182013-06-16 09:48:48 +0900271 set_opt(sbi, BG_GC);
Chao Yu04c09382014-03-18 09:07:59 +0800272 else if (strlen(name) == 3 && !strncmp(name, "off", 3))
Namjae Jeon696c0182013-06-16 09:48:48 +0900273 clear_opt(sbi, BG_GC);
274 else {
275 kfree(name);
276 return -EINVAL;
277 }
278 kfree(name);
279 break;
280 case Opt_disable_roll_forward:
281 set_opt(sbi, DISABLE_ROLL_FORWARD);
282 break;
283 case Opt_discard:
284 set_opt(sbi, DISCARD);
285 break;
286 case Opt_noheap:
287 set_opt(sbi, NOHEAP);
288 break;
289#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900290 case Opt_user_xattr:
291 set_opt(sbi, XATTR_USER);
292 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900293 case Opt_nouser_xattr:
294 clear_opt(sbi, XATTR_USER);
295 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900296 case Opt_inline_xattr:
297 set_opt(sbi, INLINE_XATTR);
298 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900299#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900300 case Opt_user_xattr:
301 f2fs_msg(sb, KERN_INFO,
302 "user_xattr options not supported");
303 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900304 case Opt_nouser_xattr:
305 f2fs_msg(sb, KERN_INFO,
306 "nouser_xattr options not supported");
307 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900308 case Opt_inline_xattr:
309 f2fs_msg(sb, KERN_INFO,
310 "inline_xattr options not supported");
311 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900312#endif
313#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900314 case Opt_acl:
315 set_opt(sbi, POSIX_ACL);
316 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900317 case Opt_noacl:
318 clear_opt(sbi, POSIX_ACL);
319 break;
320#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900321 case Opt_acl:
322 f2fs_msg(sb, KERN_INFO, "acl options not supported");
323 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900324 case Opt_noacl:
325 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
326 break;
327#endif
328 case Opt_active_logs:
329 if (args->from && match_int(args, &arg))
330 return -EINVAL;
331 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
332 return -EINVAL;
333 sbi->active_logs = arg;
334 break;
335 case Opt_disable_ext_identify:
336 set_opt(sbi, DISABLE_EXT_IDENTIFY);
337 break;
Huajun Li8274de72013-11-10 23:13:17 +0800338 case Opt_inline_data:
339 set_opt(sbi, INLINE_DATA);
340 break;
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900341 case Opt_flush_merge:
342 set_opt(sbi, FLUSH_MERGE);
343 break;
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700344 case Opt_nobarrier:
345 set_opt(sbi, NOBARRIER);
346 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900347 default:
348 f2fs_msg(sb, KERN_ERR,
349 "Unrecognized mount option \"%s\" or missing value",
350 p);
351 return -EINVAL;
352 }
353 }
354 return 0;
355}
356
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900357static struct inode *f2fs_alloc_inode(struct super_block *sb)
358{
359 struct f2fs_inode_info *fi;
360
Chao Yua0acdfe2013-12-05 09:54:00 +0800361 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900362 if (!fi)
363 return NULL;
364
365 init_once((void *) fi);
366
Masanari Iida434720f2013-03-19 08:03:35 +0900367 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900368 fi->vfs_inode.i_version = 1;
369 atomic_set(&fi->dirty_dents, 0);
370 fi->i_current_depth = 1;
371 fi->i_advise = 0;
372 rwlock_init(&fi->ext.ext_lock);
Jaegeuk Kimd928bfb2014-03-20 19:10:08 +0900373 init_rwsem(&fi->i_sem);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900374
375 set_inode_flag(fi, FI_NEW_INODE);
376
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900377 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
378 set_inode_flag(fi, FI_INLINE_XATTR);
379
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900380 /* Will be used by directory only */
381 fi->i_dir_level = F2FS_SB(sb)->dir_level;
382
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900383 return &fi->vfs_inode;
384}
385
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900386static int f2fs_drop_inode(struct inode *inode)
387{
388 /*
389 * This is to avoid a deadlock condition like below.
390 * writeback_single_inode(inode)
391 * - f2fs_write_data_page
392 * - f2fs_gc -> iput -> evict
393 * - inode_wait_for_writeback(inode)
394 */
395 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
396 return 0;
397 return generic_drop_inode(inode);
398}
399
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900400/*
401 * f2fs_dirty_inode() is called from __mark_inode_dirty()
402 *
403 * We should call set_dirty_inode to write the dirty inode through write_inode.
404 */
405static void f2fs_dirty_inode(struct inode *inode, int flags)
406{
407 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900408}
409
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900410static void f2fs_i_callback(struct rcu_head *head)
411{
412 struct inode *inode = container_of(head, struct inode, i_rcu);
413 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
414}
415
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900416static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900417{
418 call_rcu(&inode->i_rcu, f2fs_i_callback);
419}
420
421static void f2fs_put_super(struct super_block *sb)
422{
423 struct f2fs_sb_info *sbi = F2FS_SB(sb);
424
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900425 if (sbi->s_proc) {
426 remove_proc_entry("segment_info", sbi->s_proc);
427 remove_proc_entry(sb->s_id, f2fs_proc_root);
428 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900429 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900430
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900431 f2fs_destroy_stats(sbi);
432 stop_gc_thread(sbi);
433
Jaegeuk Kim5887d292013-10-08 09:30:33 +0900434 /* We don't need to do checkpoint when it's clean */
Jaegeuk Kim97c3c5c2014-08-19 09:13:01 -0700435 if (sbi->s_dirty)
Jaegeuk Kim5887d292013-10-08 09:30:33 +0900436 write_checkpoint(sbi, true);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900437
Jaegeuk Kimcf779ca2014-08-11 18:37:46 -0700438 /*
439 * normally superblock is clean, so we need to release this.
440 * In addition, EIO will skip do checkpoint, we need this as well.
441 */
Jaegeuk Kim6f12ac22014-08-19 09:48:22 -0700442 release_dirty_inode(sbi);
443
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900444 iput(sbi->node_inode);
445 iput(sbi->meta_inode);
446
447 /* destroy f2fs internal modules */
448 destroy_node_manager(sbi);
449 destroy_segment_manager(sbi);
450
451 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900452 kobject_put(&sbi->s_kobj);
453 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900454
455 sb->s_fs_info = NULL;
456 brelse(sbi->raw_super_buf);
457 kfree(sbi);
458}
459
460int f2fs_sync_fs(struct super_block *sb, int sync)
461{
462 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900463
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900464 trace_f2fs_sync_fs(sb, sync);
465
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900466 if (sync) {
467 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim43727522013-02-04 15:11:17 +0900468 write_checkpoint(sbi, false);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900469 mutex_unlock(&sbi->gc_mutex);
470 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900471 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900472 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900473
Namjae Jeon64c576f2012-12-22 12:10:27 +0900474 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900475}
476
Changman Leed6212a52013-01-29 18:30:07 +0900477static int f2fs_freeze(struct super_block *sb)
478{
479 int err;
480
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900481 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900482 return 0;
483
484 err = f2fs_sync_fs(sb, 1);
485 return err;
486}
487
488static int f2fs_unfreeze(struct super_block *sb)
489{
490 return 0;
491}
492
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900493static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
494{
495 struct super_block *sb = dentry->d_sb;
496 struct f2fs_sb_info *sbi = F2FS_SB(sb);
497 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
498 block_t total_count, user_block_count, start_count, ovp_count;
499
500 total_count = le64_to_cpu(sbi->raw_super->block_count);
501 user_block_count = sbi->user_block_count;
502 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
503 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
504 buf->f_type = F2FS_SUPER_MAGIC;
505 buf->f_bsize = sbi->blocksize;
506
507 buf->f_blocks = total_count - start_count;
508 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
509 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
510
Jaegeuk Kim1362b5e2012-12-12 19:45:49 +0900511 buf->f_files = sbi->total_node_count;
512 buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900513
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900514 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900515 buf->f_fsid.val[0] = (u32)id;
516 buf->f_fsid.val[1] = (u32)(id >> 32);
517
518 return 0;
519}
520
521static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
522{
523 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
524
Gu Zhengb270ad62014-04-11 17:49:55 +0800525 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, BG_GC))
Namjae Jeon696c0182013-06-16 09:48:48 +0900526 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900527 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900528 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900529 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
530 seq_puts(seq, ",disable_roll_forward");
531 if (test_opt(sbi, DISCARD))
532 seq_puts(seq, ",discard");
533 if (test_opt(sbi, NOHEAP))
534 seq_puts(seq, ",no_heap_alloc");
535#ifdef CONFIG_F2FS_FS_XATTR
536 if (test_opt(sbi, XATTR_USER))
537 seq_puts(seq, ",user_xattr");
538 else
539 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900540 if (test_opt(sbi, INLINE_XATTR))
541 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900542#endif
543#ifdef CONFIG_F2FS_FS_POSIX_ACL
544 if (test_opt(sbi, POSIX_ACL))
545 seq_puts(seq, ",acl");
546 else
547 seq_puts(seq, ",noacl");
548#endif
549 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100550 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800551 if (test_opt(sbi, INLINE_DATA))
552 seq_puts(seq, ",inline_data");
Gu Zhengb270ad62014-04-11 17:49:55 +0800553 if (!f2fs_readonly(sbi->sb) && test_opt(sbi, FLUSH_MERGE))
Jaegeuk Kim6b4afdd2014-04-02 15:34:36 +0900554 seq_puts(seq, ",flush_merge");
Jaegeuk Kim0f7b2ab2014-07-23 09:57:31 -0700555 if (test_opt(sbi, NOBARRIER))
556 seq_puts(seq, ",nobarrier");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900557 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
558
559 return 0;
560}
561
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900562static int segment_info_seq_show(struct seq_file *seq, void *offset)
563{
564 struct super_block *sb = seq->private;
565 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600566 unsigned int total_segs =
567 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900568 int i;
569
Chao Yu90aa6dc2014-03-17 10:31:06 +0800570 seq_puts(seq, "format: segment_type|valid_blocks\n"
571 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
572
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900573 for (i = 0; i < total_segs; i++) {
Chao Yu90aa6dc2014-03-17 10:31:06 +0800574 struct seg_entry *se = get_seg_entry(sbi, i);
575
576 if ((i % 10) == 0)
577 seq_printf(seq, "%-5d", i);
578 seq_printf(seq, "%d|%-3u", se->type,
579 get_valid_blocks(sbi, i, 1));
Gu Zheng46c04362014-03-07 18:43:33 +0800580 if ((i % 10) == 9 || i == (total_segs - 1))
581 seq_putc(seq, '\n');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900582 else
Gu Zheng46c04362014-03-07 18:43:33 +0800583 seq_putc(seq, ' ');
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900584 }
Gu Zheng46c04362014-03-07 18:43:33 +0800585
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900586 return 0;
587}
588
589static int segment_info_open_fs(struct inode *inode, struct file *file)
590{
591 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
592}
593
594static const struct file_operations f2fs_seq_segment_info_fops = {
595 .owner = THIS_MODULE,
596 .open = segment_info_open_fs,
597 .read = seq_read,
598 .llseek = seq_lseek,
599 .release = single_release,
600};
601
Namjae Jeon696c0182013-06-16 09:48:48 +0900602static int f2fs_remount(struct super_block *sb, int *flags, char *data)
603{
604 struct f2fs_sb_info *sbi = F2FS_SB(sb);
605 struct f2fs_mount_info org_mount_opt;
606 int err, active_logs;
Gu Zheng876dc592014-04-11 17:50:00 +0800607 bool need_restart_gc = false;
608 bool need_stop_gc = false;
Namjae Jeon696c0182013-06-16 09:48:48 +0900609
Theodore Ts'o02b99842014-03-13 10:14:33 -0400610 sync_filesystem(sb);
611
Namjae Jeon696c0182013-06-16 09:48:48 +0900612 /*
613 * Save the old mount options in case we
614 * need to restore them.
615 */
616 org_mount_opt = sbi->mount_opt;
617 active_logs = sbi->active_logs;
618
619 /* parse mount options */
620 err = parse_options(sb, data);
621 if (err)
622 goto restore_opts;
623
624 /*
625 * Previous and new state of filesystem is RO,
Gu Zheng876dc592014-04-11 17:50:00 +0800626 * so skip checking GC and FLUSH_MERGE conditions.
Namjae Jeon696c0182013-06-16 09:48:48 +0900627 */
Chao Yu6b2920a2014-07-07 11:21:59 +0800628 if (f2fs_readonly(sb) && (*flags & MS_RDONLY))
Namjae Jeon696c0182013-06-16 09:48:48 +0900629 goto skip;
630
631 /*
632 * We stop the GC thread if FS is mounted as RO
633 * or if background_gc = off is passed in mount
634 * option. Also sync the filesystem.
635 */
636 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
637 if (sbi->gc_thread) {
638 stop_gc_thread(sbi);
639 f2fs_sync_fs(sb, 1);
Gu Zheng876dc592014-04-11 17:50:00 +0800640 need_restart_gc = true;
Namjae Jeon696c0182013-06-16 09:48:48 +0900641 }
642 } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) {
643 err = start_gc_thread(sbi);
644 if (err)
645 goto restore_opts;
Gu Zheng876dc592014-04-11 17:50:00 +0800646 need_stop_gc = true;
647 }
648
649 /*
650 * We stop issue flush thread if FS is mounted as RO
651 * or if flush_merge is not passed in mount option.
652 */
653 if ((*flags & MS_RDONLY) || !test_opt(sbi, FLUSH_MERGE)) {
Gu Zheng2163d192014-04-27 14:21:33 +0800654 destroy_flush_cmd_control(sbi);
Chao Yu6b2920a2014-07-07 11:21:59 +0800655 } else if (test_opt(sbi, FLUSH_MERGE) && !SM_I(sbi)->cmd_control_info) {
Gu Zheng2163d192014-04-27 14:21:33 +0800656 err = create_flush_cmd_control(sbi);
657 if (err)
Gu Zhenga688b9d9e2014-04-27 14:21:21 +0800658 goto restore_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +0900659 }
660skip:
661 /* Update the POSIXACL Flag */
662 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
663 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
664 return 0;
Gu Zheng876dc592014-04-11 17:50:00 +0800665restore_gc:
666 if (need_restart_gc) {
667 if (start_gc_thread(sbi))
668 f2fs_msg(sbi->sb, KERN_WARNING,
arter97e1c42042014-08-06 23:22:50 +0900669 "background gc thread has stopped");
Gu Zheng876dc592014-04-11 17:50:00 +0800670 } else if (need_stop_gc) {
671 stop_gc_thread(sbi);
672 }
Namjae Jeon696c0182013-06-16 09:48:48 +0900673restore_opts:
674 sbi->mount_opt = org_mount_opt;
675 sbi->active_logs = active_logs;
676 return err;
677}
678
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900679static struct super_operations f2fs_sops = {
680 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900681 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900682 .destroy_inode = f2fs_destroy_inode,
683 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900684 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900685 .show_options = f2fs_show_options,
686 .evict_inode = f2fs_evict_inode,
687 .put_super = f2fs_put_super,
688 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900689 .freeze_fs = f2fs_freeze,
690 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900691 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900692 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900693};
694
695static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
696 u64 ino, u32 generation)
697{
698 struct f2fs_sb_info *sbi = F2FS_SB(sb);
699 struct inode *inode;
700
Chao Yud6b7d4b2014-06-12 13:23:41 +0800701 if (check_nid_range(sbi, ino))
Chao Yu910bb122014-03-12 17:08:36 +0800702 return ERR_PTR(-ESTALE);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900703
704 /*
705 * f2fs_iget isn't quite right if the inode is currently unallocated!
706 * However f2fs_iget currently does appropriate checks to handle stale
707 * inodes so everything is OK.
708 */
709 inode = f2fs_iget(sb, ino);
710 if (IS_ERR(inode))
711 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900712 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900713 /* we didn't find the right inode.. */
714 iput(inode);
715 return ERR_PTR(-ESTALE);
716 }
717 return inode;
718}
719
720static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
721 int fh_len, int fh_type)
722{
723 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
724 f2fs_nfs_get_inode);
725}
726
727static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
728 int fh_len, int fh_type)
729{
730 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
731 f2fs_nfs_get_inode);
732}
733
734static const struct export_operations f2fs_export_ops = {
735 .fh_to_dentry = f2fs_fh_to_dentry,
736 .fh_to_parent = f2fs_fh_to_parent,
737 .get_parent = f2fs_get_parent,
738};
739
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900740static loff_t max_file_size(unsigned bits)
741{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900742 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900743 loff_t leaf_count = ADDRS_PER_BLOCK;
744
745 /* two direct node blocks */
746 result += (leaf_count * 2);
747
748 /* two indirect node blocks */
749 leaf_count *= NIDS_PER_BLOCK;
750 result += (leaf_count * 2);
751
752 /* one double indirect node block */
753 leaf_count *= NIDS_PER_BLOCK;
754 result += leaf_count;
755
756 result <<= bits;
757 return result;
758}
759
Namjae Jeona07ef782012-12-30 14:52:05 +0900760static int sanity_check_raw_super(struct super_block *sb,
761 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900762{
763 unsigned int blocksize;
764
Namjae Jeona07ef782012-12-30 14:52:05 +0900765 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
766 f2fs_msg(sb, KERN_INFO,
767 "Magic Mismatch, valid(0x%x) - read(0x%x)",
768 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900769 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900770 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900771
majianpeng5c9b4692013-02-01 19:07:57 +0800772 /* Currently, support only 4KB page cache size */
773 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
774 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800775 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800776 PAGE_CACHE_SIZE);
777 return 1;
778 }
779
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900780 /* Currently, support only 4KB block size */
781 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800782 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900783 f2fs_msg(sb, KERN_INFO,
784 "Invalid blocksize (%u), supports only 4KB\n",
785 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900786 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900787 }
majianpeng5c9b4692013-02-01 19:07:57 +0800788
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900789 if (le32_to_cpu(raw_super->log_sectorsize) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900790 F2FS_LOG_SECTOR_SIZE) {
791 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900792 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900793 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900794 if (le32_to_cpu(raw_super->log_sectors_per_block) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900795 F2FS_LOG_SECTORS_PER_BLOCK) {
796 f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900797 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900798 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900799 return 0;
800}
801
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900802static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900803{
804 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900805 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
806 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900807
808 total = le32_to_cpu(raw_super->segment_count);
809 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
810 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
811 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
812 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
813 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
814
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900815 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900816 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900817
Jaegeuk Kim1e968fd2014-08-11 16:49:25 -0700818 if (unlikely(f2fs_cp_error(sbi))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900819 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
820 return 1;
821 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900822 return 0;
823}
824
825static void init_sb_info(struct f2fs_sb_info *sbi)
826{
827 struct f2fs_super_block *raw_super = sbi->raw_super;
828 int i;
829
830 sbi->log_sectors_per_block =
831 le32_to_cpu(raw_super->log_sectors_per_block);
832 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
833 sbi->blocksize = 1 << sbi->log_blocksize;
834 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
835 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
836 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
837 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
838 sbi->total_sections = le32_to_cpu(raw_super->section_count);
839 sbi->total_node_count =
840 (le32_to_cpu(raw_super->segment_count_nat) / 2)
841 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
842 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
843 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
844 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900845 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900846 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900847
848 for (i = 0; i < NR_COUNT_TYPE; i++)
849 atomic_set(&sbi->nr_pages[i], 0);
Jaegeuk Kimab9fa662014-02-27 20:09:05 +0900850
851 sbi->dir_level = DEF_DIR_LEVEL;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900852}
853
Gu Zheng9076a752013-10-14 18:47:11 +0800854/*
855 * Read f2fs raw super block.
856 * Because we have two copies of super block, so read the first one at first,
857 * if the first one is invalid, move to read the second one.
858 */
859static int read_raw_super_block(struct super_block *sb,
860 struct f2fs_super_block **raw_super,
861 struct buffer_head **raw_super_buf)
majianpeng14d7e9d2013-02-01 19:07:03 +0800862{
Gu Zheng9076a752013-10-14 18:47:11 +0800863 int block = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800864
Gu Zheng9076a752013-10-14 18:47:11 +0800865retry:
majianpeng14d7e9d2013-02-01 19:07:03 +0800866 *raw_super_buf = sb_bread(sb, block);
867 if (!*raw_super_buf) {
Gu Zheng9076a752013-10-14 18:47:11 +0800868 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
869 block + 1);
870 if (block == 0) {
871 block++;
872 goto retry;
873 } else {
874 return -EIO;
875 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800876 }
877
878 *raw_super = (struct f2fs_super_block *)
879 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
880
881 /* sanity checking of raw super */
Gu Zheng9076a752013-10-14 18:47:11 +0800882 if (sanity_check_raw_super(sb, *raw_super)) {
883 brelse(*raw_super_buf);
Chris Fries6c311ec2014-01-17 14:44:39 -0600884 f2fs_msg(sb, KERN_ERR,
885 "Can't find valid F2FS filesystem in %dth superblock",
886 block + 1);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900887 if (block == 0) {
Gu Zheng9076a752013-10-14 18:47:11 +0800888 block++;
889 goto retry;
890 } else {
891 return -EINVAL;
892 }
893 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800894
Gu Zheng9076a752013-10-14 18:47:11 +0800895 return 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800896}
897
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900898static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
899{
900 struct f2fs_sb_info *sbi;
901 struct f2fs_super_block *raw_super;
902 struct buffer_head *raw_super_buf;
903 struct inode *root;
904 long err = -EINVAL;
Jaegeuk Kimed2e6212014-08-08 15:37:41 -0700905 bool retry = true;
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900906 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900907
Jaegeuk Kimed2e6212014-08-08 15:37:41 -0700908try_onemore:
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900909 /* allocate memory for f2fs-specific super block info */
910 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
911 if (!sbi)
912 return -ENOMEM;
913
Namjae Jeonff9234a2013-01-12 14:41:13 +0900914 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900915 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900916 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900917 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +0900918 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900919
Gu Zheng9076a752013-10-14 18:47:11 +0800920 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
921 if (err)
922 goto free_sbi;
923
Gu Zheng5fb08372013-06-07 14:16:53 +0800924 sb->s_fs_info = sbi;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900925 /* init some FS parameters */
926 sbi->active_logs = NR_CURSEG_TYPE;
927
928 set_opt(sbi, BG_GC);
929
930#ifdef CONFIG_F2FS_FS_XATTR
931 set_opt(sbi, XATTR_USER);
932#endif
933#ifdef CONFIG_F2FS_FS_POSIX_ACL
934 set_opt(sbi, POSIX_ACL);
935#endif
936 /* parse mount options */
Gu Zheng5fb08372013-06-07 14:16:53 +0800937 err = parse_options(sb, (char *)data);
Wei Yongjun66348b72013-04-12 10:23:18 +0800938 if (err)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900939 goto free_sb_buf;
940
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900941 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900942 sb->s_max_links = F2FS_LINK_MAX;
943 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
944
945 sb->s_op = &f2fs_sops;
946 sb->s_xattr = f2fs_xattr_handlers;
947 sb->s_export_op = &f2fs_export_ops;
948 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900949 sb->s_time_gran = 1;
950 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
951 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
952 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
953
954 /* init f2fs-specific super block info */
955 sbi->sb = sb;
956 sbi->raw_super = raw_super;
957 sbi->raw_super_buf = raw_super_buf;
958 mutex_init(&sbi->gc_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900959 mutex_init(&sbi->writepages);
960 mutex_init(&sbi->cp_mutex);
Chao Yub3582c62014-07-03 18:58:39 +0800961 init_rwsem(&sbi->node_write);
Haicheng Liaabe5132013-10-23 12:39:32 +0800962 sbi->por_doing = false;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900963 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900964
Chao Yudf0f8dc2014-03-22 14:57:23 +0800965 init_rwsem(&sbi->read_io.io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900966 sbi->read_io.sbi = sbi;
967 sbi->read_io.bio = NULL;
968 for (i = 0; i < NR_PAGE_TYPE; i++) {
Chao Yudf0f8dc2014-03-22 14:57:23 +0800969 init_rwsem(&sbi->write_io[i].io_rwsem);
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900970 sbi->write_io[i].sbi = sbi;
971 sbi->write_io[i].bio = NULL;
972 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900973
Gu Zhenge4795562013-09-27 18:08:30 +0800974 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +0900975 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900976 init_sb_info(sbi);
977
978 /* get an inode for meta space */
979 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
980 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900981 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900982 err = PTR_ERR(sbi->meta_inode);
983 goto free_sb_buf;
984 }
985
986 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900987 if (err) {
988 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900989 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +0900990 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900991
992 /* sanity checking of checkpoint */
993 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900994 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900995 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900996 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +0900997 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900998
999 sbi->total_valid_node_count =
1000 le32_to_cpu(sbi->ckpt->valid_node_count);
1001 sbi->total_valid_inode_count =
1002 le32_to_cpu(sbi->ckpt->valid_inode_count);
1003 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
1004 sbi->total_valid_block_count =
1005 le64_to_cpu(sbi->ckpt->valid_block_count);
1006 sbi->last_valid_block_count = sbi->total_valid_block_count;
1007 sbi->alloc_valid_block_count = 0;
1008 INIT_LIST_HEAD(&sbi->dir_inode_list);
1009 spin_lock_init(&sbi->dir_inode_lock);
1010
Jaegeuk Kim6451e042014-07-25 15:47:17 -07001011 init_ino_entry_info(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001012
1013 /* setup f2fs internal modules */
1014 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001015 if (err) {
1016 f2fs_msg(sb, KERN_ERR,
1017 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001018 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001019 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001020 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +09001021 if (err) {
1022 f2fs_msg(sb, KERN_ERR,
1023 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001024 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +09001025 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001026
1027 build_gc_manager(sbi);
1028
1029 /* get an inode for node space */
1030 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
1031 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001032 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001033 err = PTR_ERR(sbi->node_inode);
1034 goto free_nm;
1035 }
1036
1037 /* if there are nt orphan nodes free them */
Chao Yu8f99a942013-11-28 15:43:43 +08001038 recover_orphan_inodes(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001039
1040 /* read root inode and dentry */
1041 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
1042 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +09001043 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001044 err = PTR_ERR(root);
1045 goto free_node_inode;
1046 }
Chao Yu8f99a942013-11-28 15:43:43 +08001047 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
Chao Yu9d847952014-07-25 12:55:09 +08001048 iput(root);
Chao Yu8f99a942013-11-28 15:43:43 +08001049 err = -EINVAL;
Chao Yu9d847952014-07-25 12:55:09 +08001050 goto free_node_inode;
Chao Yu8f99a942013-11-28 15:43:43 +08001051 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001052
1053 sb->s_root = d_make_root(root); /* allocate root dentry */
1054 if (!sb->s_root) {
1055 err = -ENOMEM;
1056 goto free_root_inode;
1057 }
1058
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001059 err = f2fs_build_stats(sbi);
1060 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001061 goto free_root_inode;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001062
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001063 if (f2fs_proc_root)
1064 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1065
1066 if (sbi->s_proc)
1067 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1068 &f2fs_seq_segment_info_fops, sb);
1069
Namjae Jeond3ee4562013-03-17 17:26:14 +09001070 if (test_opt(sbi, DISCARD)) {
1071 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1072 if (!blk_queue_discard(q))
1073 f2fs_msg(sb, KERN_WARNING,
1074 "mounting with \"discard\" option, but "
1075 "the device does not support discard");
1076 }
1077
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001078 sbi->s_kobj.kset = f2fs_kset;
1079 init_completion(&sbi->s_kobj_unregister);
1080 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1081 "%s", sb->s_id);
1082 if (err)
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001083 goto free_proc;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001084
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001085 /* recover fsynced data */
1086 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
1087 err = recover_fsync_data(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001088 if (err) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001089 f2fs_msg(sb, KERN_ERR,
1090 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001091 goto free_kobj;
1092 }
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001093 }
1094
1095 /*
1096 * If filesystem is not mounted as read-only then
1097 * do start the gc_thread.
1098 */
Chao Yu6b2920a2014-07-07 11:21:59 +08001099 if (!f2fs_readonly(sb)) {
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001100 /* After POR, we can run background GC thread.*/
1101 err = start_gc_thread(sbi);
1102 if (err)
1103 goto free_kobj;
1104 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001105 return 0;
Jaegeuk Kim6437d1b2014-02-19 18:23:32 +09001106
1107free_kobj:
1108 kobject_del(&sbi->s_kobj);
1109free_proc:
Chao Yu1d15bd22013-11-07 10:14:51 +08001110 if (sbi->s_proc) {
1111 remove_proc_entry("segment_info", sbi->s_proc);
1112 remove_proc_entry(sb->s_id, f2fs_proc_root);
1113 }
1114 f2fs_destroy_stats(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001115free_root_inode:
1116 dput(sb->s_root);
1117 sb->s_root = NULL;
1118free_node_inode:
1119 iput(sbi->node_inode);
1120free_nm:
1121 destroy_node_manager(sbi);
1122free_sm:
1123 destroy_segment_manager(sbi);
1124free_cp:
1125 kfree(sbi->ckpt);
1126free_meta_inode:
1127 make_bad_inode(sbi->meta_inode);
1128 iput(sbi->meta_inode);
1129free_sb_buf:
1130 brelse(raw_super_buf);
1131free_sbi:
1132 kfree(sbi);
Jaegeuk Kimed2e6212014-08-08 15:37:41 -07001133
1134 /* give only one another chance */
1135 if (retry) {
1136 retry = !retry;
1137 shrink_dcache_sb(sb);
1138 goto try_onemore;
1139 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001140 return err;
1141}
1142
1143static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1144 const char *dev_name, void *data)
1145{
1146 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1147}
1148
1149static struct file_system_type f2fs_fs_type = {
1150 .owner = THIS_MODULE,
1151 .name = "f2fs",
1152 .mount = f2fs_mount,
1153 .kill_sb = kill_block_super,
1154 .fs_flags = FS_REQUIRES_DEV,
1155};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001156MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001157
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001158static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001159{
1160 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
Gu Zhenge8512d22014-03-07 18:43:28 +08001161 sizeof(struct f2fs_inode_info));
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001162 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001163 return -ENOMEM;
1164 return 0;
1165}
1166
1167static void destroy_inodecache(void)
1168{
1169 /*
1170 * Make sure all delayed rcu free inodes are flushed before we
1171 * destroy cache.
1172 */
1173 rcu_barrier();
1174 kmem_cache_destroy(f2fs_inode_cachep);
1175}
1176
1177static int __init init_f2fs_fs(void)
1178{
1179 int err;
1180
1181 err = init_inodecache();
1182 if (err)
1183 goto fail;
1184 err = create_node_manager_caches();
1185 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001186 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001187 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001188 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001189 goto free_node_manager_caches;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001190 err = create_gc_caches();
1191 if (err)
1192 goto free_segment_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001193 err = create_checkpoint_caches();
1194 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001195 goto free_gc_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001196 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001197 if (!f2fs_kset) {
1198 err = -ENOMEM;
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001199 goto free_checkpoint_caches;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001200 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001201 err = register_filesystem(&f2fs_fs_type);
1202 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001203 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001204 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001205 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001206 return 0;
1207
1208free_kset:
1209 kset_unregister(f2fs_kset);
1210free_checkpoint_caches:
1211 destroy_checkpoint_caches();
1212free_gc_caches:
1213 destroy_gc_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001214free_segment_manager_caches:
1215 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001216free_node_manager_caches:
1217 destroy_node_manager_caches();
1218free_inodecache:
1219 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001220fail:
1221 return err;
1222}
1223
1224static void __exit exit_f2fs_fs(void)
1225{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001226 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001227 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001228 unregister_filesystem(&f2fs_fs_type);
1229 destroy_checkpoint_caches();
1230 destroy_gc_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001231 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001232 destroy_node_manager_caches();
1233 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001234 kset_unregister(f2fs_kset);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001235}
1236
1237module_init(init_f2fs_fs)
1238module_exit(exit_f2fs_fs)
1239
1240MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1241MODULE_DESCRIPTION("Flash Friendly File System");
1242MODULE_LICENSE("GPL");