blob: 1a85f83abd53262f9f1e7c5b71cb38919e85ab22 [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 Kimaff063e2012-11-02 17:07:47 +090054 Opt_err,
55};
56
57static match_table_t f2fs_tokens = {
Namjae Jeon696c0182013-06-16 09:48:48 +090058 {Opt_gc_background, "background_gc=%s"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090059 {Opt_disable_roll_forward, "disable_roll_forward"},
60 {Opt_discard, "discard"},
61 {Opt_noheap, "no_heap"},
Kelly Anderson4058c512013-10-07 11:36:20 +090062 {Opt_user_xattr, "user_xattr"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090063 {Opt_nouser_xattr, "nouser_xattr"},
Kelly Anderson4058c512013-10-07 11:36:20 +090064 {Opt_acl, "acl"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090065 {Opt_noacl, "noacl"},
66 {Opt_active_logs, "active_logs=%u"},
67 {Opt_disable_ext_identify, "disable_ext_identify"},
Jaegeuk Kim444c5802013-08-08 15:16:22 +090068 {Opt_inline_xattr, "inline_xattr"},
Huajun Li8274de72013-11-10 23:13:17 +080069 {Opt_inline_data, "inline_data"},
Jaegeuk Kimaff063e2012-11-02 17:07:47 +090070 {Opt_err, NULL},
71};
72
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090073/* Sysfs support for f2fs */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090074enum {
75 GC_THREAD, /* struct f2fs_gc_thread */
76 SM_INFO, /* struct f2fs_sm_info */
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +090077 F2FS_SBI, /* struct f2fs_sb_info */
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090078};
79
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090080struct f2fs_attr {
81 struct attribute attr;
82 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
83 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
84 const char *, size_t);
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090085 int struct_type;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +090086 int offset;
87};
88
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090089static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
90{
91 if (struct_type == GC_THREAD)
92 return (unsigned char *)sbi->gc_thread;
93 else if (struct_type == SM_INFO)
94 return (unsigned char *)SM_I(sbi);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +090095 else if (struct_type == F2FS_SBI)
96 return (unsigned char *)sbi;
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +090097 return NULL;
98}
99
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900100static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
101 struct f2fs_sb_info *sbi, char *buf)
102{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900103 unsigned char *ptr = NULL;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900104 unsigned int *ui;
105
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900106 ptr = __struct_ptr(sbi, a->struct_type);
107 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900108 return -EINVAL;
109
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900110 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900111
112 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
113}
114
115static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
116 struct f2fs_sb_info *sbi,
117 const char *buf, size_t count)
118{
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900119 unsigned char *ptr;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900120 unsigned long t;
121 unsigned int *ui;
122 ssize_t ret;
123
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900124 ptr = __struct_ptr(sbi, a->struct_type);
125 if (!ptr)
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900126 return -EINVAL;
127
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900128 ui = (unsigned int *)(ptr + a->offset);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900129
130 ret = kstrtoul(skip_spaces(buf), 0, &t);
131 if (ret < 0)
132 return ret;
133 *ui = t;
134 return count;
135}
136
137static ssize_t f2fs_attr_show(struct kobject *kobj,
138 struct attribute *attr, char *buf)
139{
140 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
141 s_kobj);
142 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
143
144 return a->show ? a->show(a, sbi, buf) : 0;
145}
146
147static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
148 const char *buf, size_t len)
149{
150 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
151 s_kobj);
152 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
153
154 return a->store ? a->store(a, sbi, buf, len) : 0;
155}
156
157static void f2fs_sb_release(struct kobject *kobj)
158{
159 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
160 s_kobj);
161 complete(&sbi->s_kobj_unregister);
162}
163
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900164#define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900165static struct f2fs_attr f2fs_attr_##_name = { \
166 .attr = {.name = __stringify(_name), .mode = _mode }, \
167 .show = _show, \
168 .store = _store, \
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900169 .struct_type = _struct_type, \
170 .offset = _offset \
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900171}
172
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900173#define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
174 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
175 f2fs_sbi_show, f2fs_sbi_store, \
176 offsetof(struct struct_name, elname))
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900177
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900178F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_min_sleep_time, min_sleep_time);
179F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time);
180F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time);
181F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle);
182F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments);
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900183F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards);
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900184F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, ipu_policy, ipu_policy);
185F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, min_ipu_util, min_ipu_util);
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900186F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, max_victim_search, max_victim_search);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900187
188#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
189static struct attribute *f2fs_attrs[] = {
190 ATTR_LIST(gc_min_sleep_time),
191 ATTR_LIST(gc_max_sleep_time),
192 ATTR_LIST(gc_no_gc_sleep_time),
Namjae Jeond2dc0952013-08-04 23:10:15 +0900193 ATTR_LIST(gc_idle),
Jaegeuk Kimea91e9b2013-10-24 15:49:07 +0900194 ATTR_LIST(reclaim_segments),
Jaegeuk Kim7ac8c3b2013-11-12 15:00:38 +0900195 ATTR_LIST(max_small_discards),
Jaegeuk Kim216fbd62013-11-07 13:13:42 +0900196 ATTR_LIST(ipu_policy),
197 ATTR_LIST(min_ipu_util),
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900198 ATTR_LIST(max_victim_search),
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900199 NULL,
200};
201
202static const struct sysfs_ops f2fs_attr_ops = {
203 .show = f2fs_attr_show,
204 .store = f2fs_attr_store,
205};
206
207static struct kobj_type f2fs_ktype = {
208 .default_attrs = f2fs_attrs,
209 .sysfs_ops = &f2fs_attr_ops,
210 .release = f2fs_sb_release,
211};
212
Namjae Jeona07ef782012-12-30 14:52:05 +0900213void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
214{
215 struct va_format vaf;
216 va_list args;
217
218 va_start(args, fmt);
219 vaf.fmt = fmt;
220 vaf.va = &args;
221 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
222 va_end(args);
223}
224
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900225static void init_once(void *foo)
226{
227 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
228
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900229 inode_init_once(&fi->vfs_inode);
230}
231
Namjae Jeon696c0182013-06-16 09:48:48 +0900232static int parse_options(struct super_block *sb, char *options)
233{
234 struct f2fs_sb_info *sbi = F2FS_SB(sb);
235 substring_t args[MAX_OPT_ARGS];
236 char *p, *name;
237 int arg = 0;
238
239 if (!options)
240 return 0;
241
242 while ((p = strsep(&options, ",")) != NULL) {
243 int token;
244 if (!*p)
245 continue;
246 /*
247 * Initialize args struct so we know whether arg was
248 * found; some options take optional arguments.
249 */
250 args[0].to = args[0].from = NULL;
251 token = match_token(p, f2fs_tokens, args);
252
253 switch (token) {
254 case Opt_gc_background:
255 name = match_strdup(&args[0]);
256
257 if (!name)
258 return -ENOMEM;
259 if (!strncmp(name, "on", 2))
260 set_opt(sbi, BG_GC);
261 else if (!strncmp(name, "off", 3))
262 clear_opt(sbi, BG_GC);
263 else {
264 kfree(name);
265 return -EINVAL;
266 }
267 kfree(name);
268 break;
269 case Opt_disable_roll_forward:
270 set_opt(sbi, DISABLE_ROLL_FORWARD);
271 break;
272 case Opt_discard:
273 set_opt(sbi, DISCARD);
274 break;
275 case Opt_noheap:
276 set_opt(sbi, NOHEAP);
277 break;
278#ifdef CONFIG_F2FS_FS_XATTR
Kelly Anderson4058c512013-10-07 11:36:20 +0900279 case Opt_user_xattr:
280 set_opt(sbi, XATTR_USER);
281 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900282 case Opt_nouser_xattr:
283 clear_opt(sbi, XATTR_USER);
284 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900285 case Opt_inline_xattr:
286 set_opt(sbi, INLINE_XATTR);
287 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900288#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900289 case Opt_user_xattr:
290 f2fs_msg(sb, KERN_INFO,
291 "user_xattr options not supported");
292 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900293 case Opt_nouser_xattr:
294 f2fs_msg(sb, KERN_INFO,
295 "nouser_xattr options not supported");
296 break;
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900297 case Opt_inline_xattr:
298 f2fs_msg(sb, KERN_INFO,
299 "inline_xattr options not supported");
300 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900301#endif
302#ifdef CONFIG_F2FS_FS_POSIX_ACL
Kelly Anderson4058c512013-10-07 11:36:20 +0900303 case Opt_acl:
304 set_opt(sbi, POSIX_ACL);
305 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900306 case Opt_noacl:
307 clear_opt(sbi, POSIX_ACL);
308 break;
309#else
Kelly Anderson4058c512013-10-07 11:36:20 +0900310 case Opt_acl:
311 f2fs_msg(sb, KERN_INFO, "acl options not supported");
312 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900313 case Opt_noacl:
314 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
315 break;
316#endif
317 case Opt_active_logs:
318 if (args->from && match_int(args, &arg))
319 return -EINVAL;
320 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
321 return -EINVAL;
322 sbi->active_logs = arg;
323 break;
324 case Opt_disable_ext_identify:
325 set_opt(sbi, DISABLE_EXT_IDENTIFY);
326 break;
Huajun Li8274de72013-11-10 23:13:17 +0800327 case Opt_inline_data:
328 set_opt(sbi, INLINE_DATA);
329 break;
Namjae Jeon696c0182013-06-16 09:48:48 +0900330 default:
331 f2fs_msg(sb, KERN_ERR,
332 "Unrecognized mount option \"%s\" or missing value",
333 p);
334 return -EINVAL;
335 }
336 }
337 return 0;
338}
339
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900340static struct inode *f2fs_alloc_inode(struct super_block *sb)
341{
342 struct f2fs_inode_info *fi;
343
Chao Yua0acdfe2013-12-05 09:54:00 +0800344 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_F2FS_ZERO);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900345 if (!fi)
346 return NULL;
347
348 init_once((void *) fi);
349
Masanari Iida434720f2013-03-19 08:03:35 +0900350 /* Initialize f2fs-specific inode info */
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900351 fi->vfs_inode.i_version = 1;
352 atomic_set(&fi->dirty_dents, 0);
353 fi->i_current_depth = 1;
354 fi->i_advise = 0;
355 rwlock_init(&fi->ext.ext_lock);
356
357 set_inode_flag(fi, FI_NEW_INODE);
358
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900359 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
360 set_inode_flag(fi, FI_INLINE_XATTR);
361
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900362 return &fi->vfs_inode;
363}
364
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900365static int f2fs_drop_inode(struct inode *inode)
366{
367 /*
368 * This is to avoid a deadlock condition like below.
369 * writeback_single_inode(inode)
370 * - f2fs_write_data_page
371 * - f2fs_gc -> iput -> evict
372 * - inode_wait_for_writeback(inode)
373 */
374 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
375 return 0;
376 return generic_drop_inode(inode);
377}
378
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900379/*
380 * f2fs_dirty_inode() is called from __mark_inode_dirty()
381 *
382 * We should call set_dirty_inode to write the dirty inode through write_inode.
383 */
384static void f2fs_dirty_inode(struct inode *inode, int flags)
385{
386 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900387}
388
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900389static void f2fs_i_callback(struct rcu_head *head)
390{
391 struct inode *inode = container_of(head, struct inode, i_rcu);
392 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
393}
394
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900395static void f2fs_destroy_inode(struct inode *inode)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900396{
397 call_rcu(&inode->i_rcu, f2fs_i_callback);
398}
399
400static void f2fs_put_super(struct super_block *sb)
401{
402 struct f2fs_sb_info *sbi = F2FS_SB(sb);
403
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900404 if (sbi->s_proc) {
405 remove_proc_entry("segment_info", sbi->s_proc);
406 remove_proc_entry(sb->s_id, f2fs_proc_root);
407 }
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900408 kobject_del(&sbi->s_kobj);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900409
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900410 f2fs_destroy_stats(sbi);
411 stop_gc_thread(sbi);
412
Jaegeuk Kim5887d292013-10-08 09:30:33 +0900413 /* We don't need to do checkpoint when it's clean */
414 if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES))
415 write_checkpoint(sbi, true);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900416
417 iput(sbi->node_inode);
418 iput(sbi->meta_inode);
419
420 /* destroy f2fs internal modules */
421 destroy_node_manager(sbi);
422 destroy_segment_manager(sbi);
423
424 kfree(sbi->ckpt);
Namjae Jeonb59d0ba2013-08-04 23:09:40 +0900425 kobject_put(&sbi->s_kobj);
426 wait_for_completion(&sbi->s_kobj_unregister);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900427
428 sb->s_fs_info = NULL;
429 brelse(sbi->raw_super_buf);
430 kfree(sbi);
431}
432
433int f2fs_sync_fs(struct super_block *sb, int sync)
434{
435 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900436
Namjae Jeona2a4a7e2013-04-20 01:28:40 +0900437 trace_f2fs_sync_fs(sb, sync);
438
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900439 if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
440 return 0;
441
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900442 if (sync) {
443 mutex_lock(&sbi->gc_mutex);
Jaegeuk Kim43727522013-02-04 15:11:17 +0900444 write_checkpoint(sbi, false);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900445 mutex_unlock(&sbi->gc_mutex);
446 } else {
Jaegeuk Kim7d82db82013-01-11 13:10:49 +0900447 f2fs_balance_fs(sbi);
Jaegeuk Kimb7473752013-04-01 08:32:21 +0900448 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900449
Namjae Jeon64c576f2012-12-22 12:10:27 +0900450 return 0;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900451}
452
Changman Leed6212a52013-01-29 18:30:07 +0900453static int f2fs_freeze(struct super_block *sb)
454{
455 int err;
456
Jaegeuk Kim77888c12013-05-20 20:28:47 +0900457 if (f2fs_readonly(sb))
Changman Leed6212a52013-01-29 18:30:07 +0900458 return 0;
459
460 err = f2fs_sync_fs(sb, 1);
461 return err;
462}
463
464static int f2fs_unfreeze(struct super_block *sb)
465{
466 return 0;
467}
468
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900469static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
470{
471 struct super_block *sb = dentry->d_sb;
472 struct f2fs_sb_info *sbi = F2FS_SB(sb);
473 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
474 block_t total_count, user_block_count, start_count, ovp_count;
475
476 total_count = le64_to_cpu(sbi->raw_super->block_count);
477 user_block_count = sbi->user_block_count;
478 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
479 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
480 buf->f_type = F2FS_SUPER_MAGIC;
481 buf->f_bsize = sbi->blocksize;
482
483 buf->f_blocks = total_count - start_count;
484 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
485 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
486
Jaegeuk Kim1362b5e2012-12-12 19:45:49 +0900487 buf->f_files = sbi->total_node_count;
488 buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900489
Jaegeuk Kim5a20d332013-03-03 13:58:05 +0900490 buf->f_namelen = F2FS_NAME_LEN;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900491 buf->f_fsid.val[0] = (u32)id;
492 buf->f_fsid.val[1] = (u32)(id >> 32);
493
494 return 0;
495}
496
497static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
498{
499 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
500
Namjae Jeon696c0182013-06-16 09:48:48 +0900501 if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC))
502 seq_printf(seq, ",background_gc=%s", "on");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900503 else
Namjae Jeon696c0182013-06-16 09:48:48 +0900504 seq_printf(seq, ",background_gc=%s", "off");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900505 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
506 seq_puts(seq, ",disable_roll_forward");
507 if (test_opt(sbi, DISCARD))
508 seq_puts(seq, ",discard");
509 if (test_opt(sbi, NOHEAP))
510 seq_puts(seq, ",no_heap_alloc");
511#ifdef CONFIG_F2FS_FS_XATTR
512 if (test_opt(sbi, XATTR_USER))
513 seq_puts(seq, ",user_xattr");
514 else
515 seq_puts(seq, ",nouser_xattr");
Jaegeuk Kim444c5802013-08-08 15:16:22 +0900516 if (test_opt(sbi, INLINE_XATTR))
517 seq_puts(seq, ",inline_xattr");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900518#endif
519#ifdef CONFIG_F2FS_FS_POSIX_ACL
520 if (test_opt(sbi, POSIX_ACL))
521 seq_puts(seq, ",acl");
522 else
523 seq_puts(seq, ",noacl");
524#endif
525 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
Alejandro Martinez Ruizaa435072013-01-25 19:08:59 +0100526 seq_puts(seq, ",disable_ext_identify");
Huajun Li8274de72013-11-10 23:13:17 +0800527 if (test_opt(sbi, INLINE_DATA))
528 seq_puts(seq, ",inline_data");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900529 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
530
531 return 0;
532}
533
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900534static int segment_info_seq_show(struct seq_file *seq, void *offset)
535{
536 struct super_block *sb = seq->private;
537 struct f2fs_sb_info *sbi = F2FS_SB(sb);
Chris Fries6c311ec2014-01-17 14:44:39 -0600538 unsigned int total_segs =
539 le32_to_cpu(sbi->raw_super->segment_count_main);
Jaegeuk Kim5e176d52013-06-28 12:47:01 +0900540 int i;
541
542 for (i = 0; i < total_segs; i++) {
543 seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1));
544 if (i != 0 && (i % 10) == 0)
545 seq_puts(seq, "\n");
546 else
547 seq_puts(seq, " ");
548 }
549 return 0;
550}
551
552static int segment_info_open_fs(struct inode *inode, struct file *file)
553{
554 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
555}
556
557static const struct file_operations f2fs_seq_segment_info_fops = {
558 .owner = THIS_MODULE,
559 .open = segment_info_open_fs,
560 .read = seq_read,
561 .llseek = seq_lseek,
562 .release = single_release,
563};
564
Namjae Jeon696c0182013-06-16 09:48:48 +0900565static int f2fs_remount(struct super_block *sb, int *flags, char *data)
566{
567 struct f2fs_sb_info *sbi = F2FS_SB(sb);
568 struct f2fs_mount_info org_mount_opt;
569 int err, active_logs;
570
571 /*
572 * Save the old mount options in case we
573 * need to restore them.
574 */
575 org_mount_opt = sbi->mount_opt;
576 active_logs = sbi->active_logs;
577
578 /* parse mount options */
579 err = parse_options(sb, data);
580 if (err)
581 goto restore_opts;
582
583 /*
584 * Previous and new state of filesystem is RO,
585 * so no point in checking GC conditions.
586 */
587 if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
588 goto skip;
589
590 /*
591 * We stop the GC thread if FS is mounted as RO
592 * or if background_gc = off is passed in mount
593 * option. Also sync the filesystem.
594 */
595 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
596 if (sbi->gc_thread) {
597 stop_gc_thread(sbi);
598 f2fs_sync_fs(sb, 1);
599 }
600 } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) {
601 err = start_gc_thread(sbi);
602 if (err)
603 goto restore_opts;
604 }
605skip:
606 /* Update the POSIXACL Flag */
607 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
608 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
609 return 0;
610
611restore_opts:
612 sbi->mount_opt = org_mount_opt;
613 sbi->active_logs = active_logs;
614 return err;
615}
616
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900617static struct super_operations f2fs_sops = {
618 .alloc_inode = f2fs_alloc_inode,
Jaegeuk Kim531ad7d2013-04-30 11:33:27 +0900619 .drop_inode = f2fs_drop_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900620 .destroy_inode = f2fs_destroy_inode,
621 .write_inode = f2fs_write_inode,
Jaegeuk Kimb3783872013-06-10 09:17:01 +0900622 .dirty_inode = f2fs_dirty_inode,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900623 .show_options = f2fs_show_options,
624 .evict_inode = f2fs_evict_inode,
625 .put_super = f2fs_put_super,
626 .sync_fs = f2fs_sync_fs,
Changman Leed6212a52013-01-29 18:30:07 +0900627 .freeze_fs = f2fs_freeze,
628 .unfreeze_fs = f2fs_unfreeze,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900629 .statfs = f2fs_statfs,
Namjae Jeon696c0182013-06-16 09:48:48 +0900630 .remount_fs = f2fs_remount,
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900631};
632
633static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
634 u64 ino, u32 generation)
635{
636 struct f2fs_sb_info *sbi = F2FS_SB(sb);
637 struct inode *inode;
638
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900639 if (unlikely(ino < F2FS_ROOT_INO(sbi)))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900640 return ERR_PTR(-ESTALE);
641
642 /*
643 * f2fs_iget isn't quite right if the inode is currently unallocated!
644 * However f2fs_iget currently does appropriate checks to handle stale
645 * inodes so everything is OK.
646 */
647 inode = f2fs_iget(sb, ino);
648 if (IS_ERR(inode))
649 return ERR_CAST(inode);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900650 if (unlikely(generation && inode->i_generation != generation)) {
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900651 /* we didn't find the right inode.. */
652 iput(inode);
653 return ERR_PTR(-ESTALE);
654 }
655 return inode;
656}
657
658static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
659 int fh_len, int fh_type)
660{
661 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
662 f2fs_nfs_get_inode);
663}
664
665static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
666 int fh_len, int fh_type)
667{
668 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
669 f2fs_nfs_get_inode);
670}
671
672static const struct export_operations f2fs_export_ops = {
673 .fh_to_dentry = f2fs_fh_to_dentry,
674 .fh_to_parent = f2fs_fh_to_parent,
675 .get_parent = f2fs_get_parent,
676};
677
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900678static loff_t max_file_size(unsigned bits)
679{
Jaegeuk Kimde936532013-08-12 21:08:03 +0900680 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900681 loff_t leaf_count = ADDRS_PER_BLOCK;
682
683 /* two direct node blocks */
684 result += (leaf_count * 2);
685
686 /* two indirect node blocks */
687 leaf_count *= NIDS_PER_BLOCK;
688 result += (leaf_count * 2);
689
690 /* one double indirect node block */
691 leaf_count *= NIDS_PER_BLOCK;
692 result += leaf_count;
693
694 result <<= bits;
695 return result;
696}
697
Namjae Jeona07ef782012-12-30 14:52:05 +0900698static int sanity_check_raw_super(struct super_block *sb,
699 struct f2fs_super_block *raw_super)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900700{
701 unsigned int blocksize;
702
Namjae Jeona07ef782012-12-30 14:52:05 +0900703 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
704 f2fs_msg(sb, KERN_INFO,
705 "Magic Mismatch, valid(0x%x) - read(0x%x)",
706 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900707 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900708 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900709
majianpeng5c9b4692013-02-01 19:07:57 +0800710 /* Currently, support only 4KB page cache size */
711 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
712 f2fs_msg(sb, KERN_INFO,
majianpeng14d7e9d2013-02-01 19:07:03 +0800713 "Invalid page_cache_size (%lu), supports only 4KB\n",
majianpeng5c9b4692013-02-01 19:07:57 +0800714 PAGE_CACHE_SIZE);
715 return 1;
716 }
717
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900718 /* Currently, support only 4KB block size */
719 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
majianpeng5c9b4692013-02-01 19:07:57 +0800720 if (blocksize != F2FS_BLKSIZE) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900721 f2fs_msg(sb, KERN_INFO,
722 "Invalid blocksize (%u), supports only 4KB\n",
723 blocksize);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900724 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900725 }
majianpeng5c9b4692013-02-01 19:07:57 +0800726
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900727 if (le32_to_cpu(raw_super->log_sectorsize) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900728 F2FS_LOG_SECTOR_SIZE) {
729 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900730 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900731 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900732 if (le32_to_cpu(raw_super->log_sectors_per_block) !=
Namjae Jeona07ef782012-12-30 14:52:05 +0900733 F2FS_LOG_SECTORS_PER_BLOCK) {
734 f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900735 return 1;
Namjae Jeona07ef782012-12-30 14:52:05 +0900736 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900737 return 0;
738}
739
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900740static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900741{
742 unsigned int total, fsmeta;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900743 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
744 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900745
746 total = le32_to_cpu(raw_super->segment_count);
747 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
748 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
749 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
750 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
751 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
752
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900753 if (unlikely(fsmeta >= total))
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900754 return 1;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900755
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900756 if (unlikely(is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) {
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900757 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
758 return 1;
759 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900760 return 0;
761}
762
763static void init_sb_info(struct f2fs_sb_info *sbi)
764{
765 struct f2fs_super_block *raw_super = sbi->raw_super;
766 int i;
767
768 sbi->log_sectors_per_block =
769 le32_to_cpu(raw_super->log_sectors_per_block);
770 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
771 sbi->blocksize = 1 << sbi->log_blocksize;
772 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
773 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
774 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
775 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
776 sbi->total_sections = le32_to_cpu(raw_super->section_count);
777 sbi->total_node_count =
778 (le32_to_cpu(raw_super->segment_count_nat) / 2)
779 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
780 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
781 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
782 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
Jaegeuk Kim5ec4e492013-03-31 13:26:03 +0900783 sbi->cur_victim_sec = NULL_SECNO;
Jaegeuk Kimb1c57c12014-01-08 13:45:08 +0900784 sbi->max_victim_search = DEF_MAX_VICTIM_SEARCH;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900785
786 for (i = 0; i < NR_COUNT_TYPE; i++)
787 atomic_set(&sbi->nr_pages[i], 0);
788}
789
Gu Zheng9076a752013-10-14 18:47:11 +0800790/*
791 * Read f2fs raw super block.
792 * Because we have two copies of super block, so read the first one at first,
793 * if the first one is invalid, move to read the second one.
794 */
795static int read_raw_super_block(struct super_block *sb,
796 struct f2fs_super_block **raw_super,
797 struct buffer_head **raw_super_buf)
majianpeng14d7e9d2013-02-01 19:07:03 +0800798{
Gu Zheng9076a752013-10-14 18:47:11 +0800799 int block = 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800800
Gu Zheng9076a752013-10-14 18:47:11 +0800801retry:
majianpeng14d7e9d2013-02-01 19:07:03 +0800802 *raw_super_buf = sb_bread(sb, block);
803 if (!*raw_super_buf) {
Gu Zheng9076a752013-10-14 18:47:11 +0800804 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
805 block + 1);
806 if (block == 0) {
807 block++;
808 goto retry;
809 } else {
810 return -EIO;
811 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800812 }
813
814 *raw_super = (struct f2fs_super_block *)
815 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
816
817 /* sanity checking of raw super */
Gu Zheng9076a752013-10-14 18:47:11 +0800818 if (sanity_check_raw_super(sb, *raw_super)) {
819 brelse(*raw_super_buf);
Chris Fries6c311ec2014-01-17 14:44:39 -0600820 f2fs_msg(sb, KERN_ERR,
821 "Can't find valid F2FS filesystem in %dth superblock",
822 block + 1);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900823 if (block == 0) {
Gu Zheng9076a752013-10-14 18:47:11 +0800824 block++;
825 goto retry;
826 } else {
827 return -EINVAL;
828 }
829 }
majianpeng14d7e9d2013-02-01 19:07:03 +0800830
Gu Zheng9076a752013-10-14 18:47:11 +0800831 return 0;
majianpeng14d7e9d2013-02-01 19:07:03 +0800832}
833
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900834static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
835{
836 struct f2fs_sb_info *sbi;
837 struct f2fs_super_block *raw_super;
838 struct buffer_head *raw_super_buf;
839 struct inode *root;
840 long err = -EINVAL;
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900841 int i;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900842
843 /* allocate memory for f2fs-specific super block info */
844 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
845 if (!sbi)
846 return -ENOMEM;
847
Namjae Jeonff9234a2013-01-12 14:41:13 +0900848 /* set a block size */
Jaegeuk Kim6bacf522013-12-06 15:00:58 +0900849 if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900850 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900851 goto free_sbi;
Namjae Jeona07ef782012-12-30 14:52:05 +0900852 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900853
Gu Zheng9076a752013-10-14 18:47:11 +0800854 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
855 if (err)
856 goto free_sbi;
857
Gu Zheng5fb08372013-06-07 14:16:53 +0800858 sb->s_fs_info = sbi;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900859 /* init some FS parameters */
860 sbi->active_logs = NR_CURSEG_TYPE;
861
862 set_opt(sbi, BG_GC);
863
864#ifdef CONFIG_F2FS_FS_XATTR
865 set_opt(sbi, XATTR_USER);
866#endif
867#ifdef CONFIG_F2FS_FS_POSIX_ACL
868 set_opt(sbi, POSIX_ACL);
869#endif
870 /* parse mount options */
Gu Zheng5fb08372013-06-07 14:16:53 +0800871 err = parse_options(sb, (char *)data);
Wei Yongjun66348b72013-04-12 10:23:18 +0800872 if (err)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900873 goto free_sb_buf;
874
Jaegeuk Kim25ca9232012-11-28 16:12:41 +0900875 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900876 sb->s_max_links = F2FS_LINK_MAX;
877 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
878
879 sb->s_op = &f2fs_sops;
880 sb->s_xattr = f2fs_xattr_handlers;
881 sb->s_export_op = &f2fs_export_ops;
882 sb->s_magic = F2FS_SUPER_MAGIC;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900883 sb->s_time_gran = 1;
884 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
885 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
886 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
887
888 /* init f2fs-specific super block info */
889 sbi->sb = sb;
890 sbi->raw_super = raw_super;
891 sbi->raw_super_buf = raw_super_buf;
892 mutex_init(&sbi->gc_mutex);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900893 mutex_init(&sbi->writepages);
894 mutex_init(&sbi->cp_mutex);
Jaegeuk Kim39936832012-11-22 16:21:29 +0900895 mutex_init(&sbi->node_write);
Haicheng Liaabe5132013-10-23 12:39:32 +0800896 sbi->por_doing = false;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900897 spin_lock_init(&sbi->stat_lock);
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900898
Chao Yu924b7202013-11-20 14:46:39 +0800899 mutex_init(&sbi->read_io.io_mutex);
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900900 sbi->read_io.sbi = sbi;
901 sbi->read_io.bio = NULL;
902 for (i = 0; i < NR_PAGE_TYPE; i++) {
Jaegeuk Kim1ff7bd32013-11-19 12:47:22 +0900903 mutex_init(&sbi->write_io[i].io_mutex);
Jaegeuk Kim458e6192013-12-11 13:54:01 +0900904 sbi->write_io[i].sbi = sbi;
905 sbi->write_io[i].bio = NULL;
906 }
Jaegeuk Kim971767c2013-11-18 17:16:17 +0900907
Gu Zhenge4795562013-09-27 18:08:30 +0800908 init_rwsem(&sbi->cp_rwsem);
Changman Leefb51b5e2013-11-07 12:48:25 +0900909 init_waitqueue_head(&sbi->cp_wait);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900910 init_sb_info(sbi);
911
912 /* get an inode for meta space */
913 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
914 if (IS_ERR(sbi->meta_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900915 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900916 err = PTR_ERR(sbi->meta_inode);
917 goto free_sb_buf;
918 }
919
920 err = get_valid_checkpoint(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900921 if (err) {
922 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900923 goto free_meta_inode;
Namjae Jeona07ef782012-12-30 14:52:05 +0900924 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900925
926 /* sanity checking of checkpoint */
927 err = -EINVAL;
Jaegeuk Kim577e3492013-01-24 19:56:11 +0900928 if (sanity_check_ckpt(sbi)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900929 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900930 goto free_cp;
Namjae Jeona07ef782012-12-30 14:52:05 +0900931 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900932
933 sbi->total_valid_node_count =
934 le32_to_cpu(sbi->ckpt->valid_node_count);
935 sbi->total_valid_inode_count =
936 le32_to_cpu(sbi->ckpt->valid_inode_count);
937 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
938 sbi->total_valid_block_count =
939 le64_to_cpu(sbi->ckpt->valid_block_count);
940 sbi->last_valid_block_count = sbi->total_valid_block_count;
941 sbi->alloc_valid_block_count = 0;
942 INIT_LIST_HEAD(&sbi->dir_inode_list);
943 spin_lock_init(&sbi->dir_inode_lock);
944
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900945 init_orphan_info(sbi);
946
947 /* setup f2fs internal modules */
948 err = build_segment_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900949 if (err) {
950 f2fs_msg(sb, KERN_ERR,
951 "Failed to initialize F2FS segment manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900952 goto free_sm;
Namjae Jeona07ef782012-12-30 14:52:05 +0900953 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900954 err = build_node_manager(sbi);
Namjae Jeona07ef782012-12-30 14:52:05 +0900955 if (err) {
956 f2fs_msg(sb, KERN_ERR,
957 "Failed to initialize F2FS node manager");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900958 goto free_nm;
Namjae Jeona07ef782012-12-30 14:52:05 +0900959 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900960
961 build_gc_manager(sbi);
962
963 /* get an inode for node space */
964 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
965 if (IS_ERR(sbi->node_inode)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900966 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900967 err = PTR_ERR(sbi->node_inode);
968 goto free_nm;
969 }
970
971 /* if there are nt orphan nodes free them */
Chao Yu8f99a942013-11-28 15:43:43 +0800972 recover_orphan_inodes(sbi);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900973
974 /* read root inode and dentry */
975 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
976 if (IS_ERR(root)) {
Namjae Jeona07ef782012-12-30 14:52:05 +0900977 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900978 err = PTR_ERR(root);
979 goto free_node_inode;
980 }
Chao Yu8f99a942013-11-28 15:43:43 +0800981 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
982 err = -EINVAL;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900983 goto free_root_inode;
Chao Yu8f99a942013-11-28 15:43:43 +0800984 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900985
986 sb->s_root = d_make_root(root); /* allocate root dentry */
987 if (!sb->s_root) {
988 err = -ENOMEM;
989 goto free_root_inode;
990 }
991
992 /* recover fsynced data */
Jaegeuk Kim6ead1142013-03-20 19:01:06 +0900993 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
994 err = recover_fsync_data(sbi);
Chris Friesbde582b2013-05-02 16:07:34 -0500995 if (err)
996 f2fs_msg(sb, KERN_ERR,
997 "Cannot recover all fsync data errno=%ld", err);
Jaegeuk Kim6ead1142013-03-20 19:01:06 +0900998 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +0900999
Namjae Jeon696c0182013-06-16 09:48:48 +09001000 /*
1001 * If filesystem is not mounted as read-only then
1002 * do start the gc_thread.
1003 */
1004 if (!(sb->s_flags & MS_RDONLY)) {
1005 /* After POR, we can run background GC thread.*/
1006 err = start_gc_thread(sbi);
1007 if (err)
Chao Yu1d15bd22013-11-07 10:14:51 +08001008 goto free_gc;
Namjae Jeon696c0182013-06-16 09:48:48 +09001009 }
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001010
1011 err = f2fs_build_stats(sbi);
1012 if (err)
Chao Yu1d15bd22013-11-07 10:14:51 +08001013 goto free_gc;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001014
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001015 if (f2fs_proc_root)
1016 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
1017
1018 if (sbi->s_proc)
1019 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
1020 &f2fs_seq_segment_info_fops, sb);
1021
Namjae Jeond3ee4562013-03-17 17:26:14 +09001022 if (test_opt(sbi, DISCARD)) {
1023 struct request_queue *q = bdev_get_queue(sb->s_bdev);
1024 if (!blk_queue_discard(q))
1025 f2fs_msg(sb, KERN_WARNING,
1026 "mounting with \"discard\" option, but "
1027 "the device does not support discard");
1028 }
1029
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001030 sbi->s_kobj.kset = f2fs_kset;
1031 init_completion(&sbi->s_kobj_unregister);
1032 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
1033 "%s", sb->s_id);
1034 if (err)
1035 goto fail;
1036
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001037 return 0;
1038fail:
Chao Yu1d15bd22013-11-07 10:14:51 +08001039 if (sbi->s_proc) {
1040 remove_proc_entry("segment_info", sbi->s_proc);
1041 remove_proc_entry(sb->s_id, f2fs_proc_root);
1042 }
1043 f2fs_destroy_stats(sbi);
1044free_gc:
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001045 stop_gc_thread(sbi);
1046free_root_inode:
1047 dput(sb->s_root);
1048 sb->s_root = NULL;
1049free_node_inode:
1050 iput(sbi->node_inode);
1051free_nm:
1052 destroy_node_manager(sbi);
1053free_sm:
1054 destroy_segment_manager(sbi);
1055free_cp:
1056 kfree(sbi->ckpt);
1057free_meta_inode:
1058 make_bad_inode(sbi->meta_inode);
1059 iput(sbi->meta_inode);
1060free_sb_buf:
1061 brelse(raw_super_buf);
1062free_sbi:
1063 kfree(sbi);
1064 return err;
1065}
1066
1067static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1068 const char *dev_name, void *data)
1069{
1070 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1071}
1072
1073static struct file_system_type f2fs_fs_type = {
1074 .owner = THIS_MODULE,
1075 .name = "f2fs",
1076 .mount = f2fs_mount,
1077 .kill_sb = kill_block_super,
1078 .fs_flags = FS_REQUIRES_DEV,
1079};
Eric W. Biederman7f78e032013-03-02 19:39:14 -08001080MODULE_ALIAS_FS("f2fs");
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001081
Namjae Jeon6e6093a2013-01-17 00:08:30 +09001082static int __init init_inodecache(void)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001083{
1084 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
1085 sizeof(struct f2fs_inode_info), NULL);
Jaegeuk Kim6bacf522013-12-06 15:00:58 +09001086 if (!f2fs_inode_cachep)
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001087 return -ENOMEM;
1088 return 0;
1089}
1090
1091static void destroy_inodecache(void)
1092{
1093 /*
1094 * Make sure all delayed rcu free inodes are flushed before we
1095 * destroy cache.
1096 */
1097 rcu_barrier();
1098 kmem_cache_destroy(f2fs_inode_cachep);
1099}
1100
1101static int __init init_f2fs_fs(void)
1102{
1103 int err;
1104
1105 err = init_inodecache();
1106 if (err)
1107 goto fail;
1108 err = create_node_manager_caches();
1109 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001110 goto free_inodecache;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001111 err = create_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001112 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001113 goto free_node_manager_caches;
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001114 err = create_gc_caches();
1115 if (err)
1116 goto free_segment_manager_caches;
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001117 err = create_checkpoint_caches();
1118 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001119 goto free_gc_caches;
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001120 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001121 if (!f2fs_kset) {
1122 err = -ENOMEM;
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001123 goto free_checkpoint_caches;
Wei Yongjun6e6b9782013-08-23 08:30:20 +08001124 }
Namjae Jeon4589d252013-01-15 19:58:47 +09001125 err = register_filesystem(&f2fs_fs_type);
1126 if (err)
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001127 goto free_kset;
Namjae Jeon4589d252013-01-15 19:58:47 +09001128 f2fs_create_root_stats();
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001129 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001130 return 0;
1131
1132free_kset:
1133 kset_unregister(f2fs_kset);
1134free_checkpoint_caches:
1135 destroy_checkpoint_caches();
1136free_gc_caches:
1137 destroy_gc_caches();
Jaegeuk Kim7fd9e542013-11-15 13:55:58 +09001138free_segment_manager_caches:
1139 destroy_segment_manager_caches();
Zhao Hongjiang9890ff32013-08-20 16:49:51 +08001140free_node_manager_caches:
1141 destroy_node_manager_caches();
1142free_inodecache:
1143 destroy_inodecache();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001144fail:
1145 return err;
1146}
1147
1148static void __exit exit_f2fs_fs(void)
1149{
Jaegeuk Kim5e176d52013-06-28 12:47:01 +09001150 remove_proc_entry("fs/f2fs", NULL);
Namjae Jeon4589d252013-01-15 19:58:47 +09001151 f2fs_destroy_root_stats();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001152 unregister_filesystem(&f2fs_fs_type);
1153 destroy_checkpoint_caches();
1154 destroy_gc_caches();
Changman Lee5dcd8a72013-12-11 14:32:13 +09001155 destroy_segment_manager_caches();
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001156 destroy_node_manager_caches();
1157 destroy_inodecache();
Namjae Jeonb59d0ba2013-08-04 23:09:40 +09001158 kset_unregister(f2fs_kset);
Jaegeuk Kimaff063e2012-11-02 17:07:47 +09001159}
1160
1161module_init(init_f2fs_fs)
1162module_exit(exit_f2fs_fs)
1163
1164MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1165MODULE_DESCRIPTION("Flash Friendly File System");
1166MODULE_LICENSE("GPL");