4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
11 #include <linux/module.h>
12 #include <linux/init.h>
14 #include <linux/statfs.h>
15 #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>
21 #include <linux/proc_fs.h>
22 #include <linux/random.h>
23 #include <linux/exportfs.h>
24 #include <linux/blkdev.h>
25 #include <linux/f2fs_fs.h>
26 #include <linux/sysfs.h>
35 #define CREATE_TRACE_POINTS
36 #include <trace/events/f2fs.h>
38 static struct proc_dir_entry
*f2fs_proc_root
;
39 static struct kmem_cache
*f2fs_inode_cachep
;
40 static struct kset
*f2fs_kset
;
42 /* f2fs-wide shrinker description */
43 static struct shrinker f2fs_shrinker_info
= {
44 .scan_objects
= f2fs_shrink_scan
,
45 .count_objects
= f2fs_shrink_count
,
46 .seeks
= DEFAULT_SEEKS
,
51 Opt_disable_roll_forward
,
60 Opt_disable_ext_identify
,
74 static match_table_t f2fs_tokens
= {
75 {Opt_gc_background
, "background_gc=%s"},
76 {Opt_disable_roll_forward
, "disable_roll_forward"},
77 {Opt_norecovery
, "norecovery"},
78 {Opt_discard
, "discard"},
79 {Opt_noheap
, "no_heap"},
80 {Opt_user_xattr
, "user_xattr"},
81 {Opt_nouser_xattr
, "nouser_xattr"},
84 {Opt_active_logs
, "active_logs=%u"},
85 {Opt_disable_ext_identify
, "disable_ext_identify"},
86 {Opt_inline_xattr
, "inline_xattr"},
87 {Opt_inline_data
, "inline_data"},
88 {Opt_inline_dentry
, "inline_dentry"},
89 {Opt_flush_merge
, "flush_merge"},
90 {Opt_nobarrier
, "nobarrier"},
91 {Opt_fastboot
, "fastboot"},
92 {Opt_extent_cache
, "extent_cache"},
93 {Opt_noextent_cache
, "noextent_cache"},
94 {Opt_noinline_data
, "noinline_data"},
95 {Opt_data_flush
, "data_flush"},
99 /* Sysfs support for f2fs */
101 GC_THREAD
, /* struct f2fs_gc_thread */
102 SM_INFO
, /* struct f2fs_sm_info */
103 NM_INFO
, /* struct f2fs_nm_info */
104 F2FS_SBI
, /* struct f2fs_sb_info */
108 struct attribute attr
;
109 ssize_t (*show
)(struct f2fs_attr
*, struct f2fs_sb_info
*, char *);
110 ssize_t (*store
)(struct f2fs_attr
*, struct f2fs_sb_info
*,
111 const char *, size_t);
116 static unsigned char *__struct_ptr(struct f2fs_sb_info
*sbi
, int struct_type
)
118 if (struct_type
== GC_THREAD
)
119 return (unsigned char *)sbi
->gc_thread
;
120 else if (struct_type
== SM_INFO
)
121 return (unsigned char *)SM_I(sbi
);
122 else if (struct_type
== NM_INFO
)
123 return (unsigned char *)NM_I(sbi
);
124 else if (struct_type
== F2FS_SBI
)
125 return (unsigned char *)sbi
;
129 static ssize_t
f2fs_sbi_show(struct f2fs_attr
*a
,
130 struct f2fs_sb_info
*sbi
, char *buf
)
132 unsigned char *ptr
= NULL
;
135 ptr
= __struct_ptr(sbi
, a
->struct_type
);
139 ui
= (unsigned int *)(ptr
+ a
->offset
);
141 return snprintf(buf
, PAGE_SIZE
, "%u\n", *ui
);
144 static ssize_t
f2fs_sbi_store(struct f2fs_attr
*a
,
145 struct f2fs_sb_info
*sbi
,
146 const char *buf
, size_t count
)
153 ptr
= __struct_ptr(sbi
, a
->struct_type
);
157 ui
= (unsigned int *)(ptr
+ a
->offset
);
159 ret
= kstrtoul(skip_spaces(buf
), 0, &t
);
166 static ssize_t
f2fs_attr_show(struct kobject
*kobj
,
167 struct attribute
*attr
, char *buf
)
169 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
171 struct f2fs_attr
*a
= container_of(attr
, struct f2fs_attr
, attr
);
173 return a
->show
? a
->show(a
, sbi
, buf
) : 0;
176 static ssize_t
f2fs_attr_store(struct kobject
*kobj
, struct attribute
*attr
,
177 const char *buf
, size_t len
)
179 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
181 struct f2fs_attr
*a
= container_of(attr
, struct f2fs_attr
, attr
);
183 return a
->store
? a
->store(a
, sbi
, buf
, len
) : 0;
186 static void f2fs_sb_release(struct kobject
*kobj
)
188 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
190 complete(&sbi
->s_kobj_unregister
);
193 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
194 static struct f2fs_attr f2fs_attr_##_name = { \
195 .attr = {.name = __stringify(_name), .mode = _mode }, \
198 .struct_type = _struct_type, \
202 #define F2FS_RW_ATTR(struct_type, struct_name, name, elname) \
203 F2FS_ATTR_OFFSET(struct_type, name, 0644, \
204 f2fs_sbi_show, f2fs_sbi_store, \
205 offsetof(struct struct_name, elname))
207 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_min_sleep_time
, min_sleep_time
);
208 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_max_sleep_time
, max_sleep_time
);
209 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_no_gc_sleep_time
, no_gc_sleep_time
);
210 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_idle
, gc_idle
);
211 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, reclaim_segments
, rec_prefree_segments
);
212 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, max_small_discards
, max_discards
);
213 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, batched_trim_sections
, trim_sections
);
214 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, ipu_policy
, ipu_policy
);
215 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, min_ipu_util
, min_ipu_util
);
216 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, min_fsync_blocks
, min_fsync_blocks
);
217 F2FS_RW_ATTR(NM_INFO
, f2fs_nm_info
, ram_thresh
, ram_thresh
);
218 F2FS_RW_ATTR(NM_INFO
, f2fs_nm_info
, ra_nid_pages
, ra_nid_pages
);
219 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, max_victim_search
, max_victim_search
);
220 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, dir_level
, dir_level
);
221 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, cp_interval
, interval_time
[CP_TIME
]);
222 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, idle_interval
, interval_time
[REQ_TIME
]);
224 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
225 static struct attribute
*f2fs_attrs
[] = {
226 ATTR_LIST(gc_min_sleep_time
),
227 ATTR_LIST(gc_max_sleep_time
),
228 ATTR_LIST(gc_no_gc_sleep_time
),
230 ATTR_LIST(reclaim_segments
),
231 ATTR_LIST(max_small_discards
),
232 ATTR_LIST(batched_trim_sections
),
233 ATTR_LIST(ipu_policy
),
234 ATTR_LIST(min_ipu_util
),
235 ATTR_LIST(min_fsync_blocks
),
236 ATTR_LIST(max_victim_search
),
237 ATTR_LIST(dir_level
),
238 ATTR_LIST(ram_thresh
),
239 ATTR_LIST(ra_nid_pages
),
240 ATTR_LIST(cp_interval
),
241 ATTR_LIST(idle_interval
),
245 static const struct sysfs_ops f2fs_attr_ops
= {
246 .show
= f2fs_attr_show
,
247 .store
= f2fs_attr_store
,
250 static struct kobj_type f2fs_ktype
= {
251 .default_attrs
= f2fs_attrs
,
252 .sysfs_ops
= &f2fs_attr_ops
,
253 .release
= f2fs_sb_release
,
256 void f2fs_msg(struct super_block
*sb
, const char *level
, const char *fmt
, ...)
258 struct va_format vaf
;
264 printk("%sF2FS-fs (%s): %pV\n", level
, sb
->s_id
, &vaf
);
268 static void init_once(void *foo
)
270 struct f2fs_inode_info
*fi
= (struct f2fs_inode_info
*) foo
;
272 inode_init_once(&fi
->vfs_inode
);
275 static int parse_options(struct super_block
*sb
, char *options
)
277 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
278 struct request_queue
*q
;
279 substring_t args
[MAX_OPT_ARGS
];
286 while ((p
= strsep(&options
, ",")) != NULL
) {
291 * Initialize args struct so we know whether arg was
292 * found; some options take optional arguments.
294 args
[0].to
= args
[0].from
= NULL
;
295 token
= match_token(p
, f2fs_tokens
, args
);
298 case Opt_gc_background
:
299 name
= match_strdup(&args
[0]);
303 if (strlen(name
) == 2 && !strncmp(name
, "on", 2)) {
305 clear_opt(sbi
, FORCE_FG_GC
);
306 } else if (strlen(name
) == 3 && !strncmp(name
, "off", 3)) {
307 clear_opt(sbi
, BG_GC
);
308 clear_opt(sbi
, FORCE_FG_GC
);
309 } else if (strlen(name
) == 4 && !strncmp(name
, "sync", 4)) {
311 set_opt(sbi
, FORCE_FG_GC
);
318 case Opt_disable_roll_forward
:
319 set_opt(sbi
, DISABLE_ROLL_FORWARD
);
322 /* this option mounts f2fs with ro */
323 set_opt(sbi
, DISABLE_ROLL_FORWARD
);
324 if (!f2fs_readonly(sb
))
328 q
= bdev_get_queue(sb
->s_bdev
);
329 if (blk_queue_discard(q
)) {
330 set_opt(sbi
, DISCARD
);
332 f2fs_msg(sb
, KERN_WARNING
,
333 "mounting with \"discard\" option, but "
334 "the device does not support discard");
338 set_opt(sbi
, NOHEAP
);
340 #ifdef CONFIG_F2FS_FS_XATTR
342 set_opt(sbi
, XATTR_USER
);
344 case Opt_nouser_xattr
:
345 clear_opt(sbi
, XATTR_USER
);
347 case Opt_inline_xattr
:
348 set_opt(sbi
, INLINE_XATTR
);
352 f2fs_msg(sb
, KERN_INFO
,
353 "user_xattr options not supported");
355 case Opt_nouser_xattr
:
356 f2fs_msg(sb
, KERN_INFO
,
357 "nouser_xattr options not supported");
359 case Opt_inline_xattr
:
360 f2fs_msg(sb
, KERN_INFO
,
361 "inline_xattr options not supported");
364 #ifdef CONFIG_F2FS_FS_POSIX_ACL
366 set_opt(sbi
, POSIX_ACL
);
369 clear_opt(sbi
, POSIX_ACL
);
373 f2fs_msg(sb
, KERN_INFO
, "acl options not supported");
376 f2fs_msg(sb
, KERN_INFO
, "noacl options not supported");
379 case Opt_active_logs
:
380 if (args
->from
&& match_int(args
, &arg
))
382 if (arg
!= 2 && arg
!= 4 && arg
!= NR_CURSEG_TYPE
)
384 sbi
->active_logs
= arg
;
386 case Opt_disable_ext_identify
:
387 set_opt(sbi
, DISABLE_EXT_IDENTIFY
);
389 case Opt_inline_data
:
390 set_opt(sbi
, INLINE_DATA
);
392 case Opt_inline_dentry
:
393 set_opt(sbi
, INLINE_DENTRY
);
395 case Opt_flush_merge
:
396 set_opt(sbi
, FLUSH_MERGE
);
399 set_opt(sbi
, NOBARRIER
);
402 set_opt(sbi
, FASTBOOT
);
404 case Opt_extent_cache
:
405 set_opt(sbi
, EXTENT_CACHE
);
407 case Opt_noextent_cache
:
408 clear_opt(sbi
, EXTENT_CACHE
);
410 case Opt_noinline_data
:
411 clear_opt(sbi
, INLINE_DATA
);
414 set_opt(sbi
, DATA_FLUSH
);
417 f2fs_msg(sb
, KERN_ERR
,
418 "Unrecognized mount option \"%s\" or missing value",
426 static struct inode
*f2fs_alloc_inode(struct super_block
*sb
)
428 struct f2fs_inode_info
*fi
;
430 fi
= kmem_cache_alloc(f2fs_inode_cachep
, GFP_F2FS_ZERO
);
434 init_once((void *) fi
);
436 /* Initialize f2fs-specific inode info */
437 fi
->vfs_inode
.i_version
= 1;
438 atomic_set(&fi
->dirty_pages
, 0);
439 fi
->i_current_depth
= 1;
441 init_rwsem(&fi
->i_sem
);
442 INIT_LIST_HEAD(&fi
->dirty_list
);
443 INIT_LIST_HEAD(&fi
->inmem_pages
);
444 mutex_init(&fi
->inmem_lock
);
446 set_inode_flag(fi
, FI_NEW_INODE
);
448 if (test_opt(F2FS_SB(sb
), INLINE_XATTR
))
449 set_inode_flag(fi
, FI_INLINE_XATTR
);
451 /* Will be used by directory only */
452 fi
->i_dir_level
= F2FS_SB(sb
)->dir_level
;
454 #ifdef CONFIG_F2FS_FS_ENCRYPTION
455 fi
->i_crypt_info
= NULL
;
457 return &fi
->vfs_inode
;
460 static int f2fs_drop_inode(struct inode
*inode
)
463 * This is to avoid a deadlock condition like below.
464 * writeback_single_inode(inode)
465 * - f2fs_write_data_page
466 * - f2fs_gc -> iput -> evict
467 * - inode_wait_for_writeback(inode)
469 if (!inode_unhashed(inode
) && inode
->i_state
& I_SYNC
) {
470 if (!inode
->i_nlink
&& !is_bad_inode(inode
)) {
471 /* to avoid evict_inode call simultaneously */
472 atomic_inc(&inode
->i_count
);
473 spin_unlock(&inode
->i_lock
);
475 /* some remained atomic pages should discarded */
476 if (f2fs_is_atomic_file(inode
))
477 commit_inmem_pages(inode
, true);
479 /* should remain fi->extent_tree for writepage */
480 f2fs_destroy_extent_node(inode
);
482 sb_start_intwrite(inode
->i_sb
);
483 i_size_write(inode
, 0);
485 if (F2FS_HAS_BLOCKS(inode
))
486 f2fs_truncate(inode
, true);
488 sb_end_intwrite(inode
->i_sb
);
490 #ifdef CONFIG_F2FS_FS_ENCRYPTION
491 if (F2FS_I(inode
)->i_crypt_info
)
492 f2fs_free_encryption_info(inode
,
493 F2FS_I(inode
)->i_crypt_info
);
495 spin_lock(&inode
->i_lock
);
496 atomic_dec(&inode
->i_count
);
500 return generic_drop_inode(inode
);
504 * f2fs_dirty_inode() is called from __mark_inode_dirty()
506 * We should call set_dirty_inode to write the dirty inode through write_inode.
508 static void f2fs_dirty_inode(struct inode
*inode
, int flags
)
510 set_inode_flag(F2FS_I(inode
), FI_DIRTY_INODE
);
513 static void f2fs_i_callback(struct rcu_head
*head
)
515 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
516 kmem_cache_free(f2fs_inode_cachep
, F2FS_I(inode
));
519 static void f2fs_destroy_inode(struct inode
*inode
)
521 call_rcu(&inode
->i_rcu
, f2fs_i_callback
);
524 static void f2fs_put_super(struct super_block
*sb
)
526 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
529 remove_proc_entry("segment_info", sbi
->s_proc
);
530 remove_proc_entry(sb
->s_id
, f2fs_proc_root
);
532 kobject_del(&sbi
->s_kobj
);
536 /* prevent remaining shrinker jobs */
537 mutex_lock(&sbi
->umount_mutex
);
540 * We don't need to do checkpoint when superblock is clean.
541 * But, the previous checkpoint was not done by umount, it needs to do
542 * clean checkpoint again.
544 if (is_sbi_flag_set(sbi
, SBI_IS_DIRTY
) ||
545 !is_set_ckpt_flags(F2FS_CKPT(sbi
), CP_UMOUNT_FLAG
)) {
546 struct cp_control cpc
= {
549 write_checkpoint(sbi
, &cpc
);
552 /* write_checkpoint can update stat informaion */
553 f2fs_destroy_stats(sbi
);
556 * normally superblock is clean, so we need to release this.
557 * In addition, EIO will skip do checkpoint, we need this as well.
559 release_ino_entry(sbi
);
560 release_discard_addrs(sbi
);
562 f2fs_leave_shrinker(sbi
);
563 mutex_unlock(&sbi
->umount_mutex
);
565 iput(sbi
->node_inode
);
566 iput(sbi
->meta_inode
);
568 /* destroy f2fs internal modules */
569 destroy_node_manager(sbi
);
570 destroy_segment_manager(sbi
);
573 kobject_put(&sbi
->s_kobj
);
574 wait_for_completion(&sbi
->s_kobj_unregister
);
576 sb
->s_fs_info
= NULL
;
577 kfree(sbi
->raw_super
);
581 int f2fs_sync_fs(struct super_block
*sb
, int sync
)
583 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
586 trace_f2fs_sync_fs(sb
, sync
);
589 struct cp_control cpc
;
591 cpc
.reason
= __get_cp_reason(sbi
);
593 mutex_lock(&sbi
->gc_mutex
);
594 err
= write_checkpoint(sbi
, &cpc
);
595 mutex_unlock(&sbi
->gc_mutex
);
597 f2fs_trace_ios(NULL
, 1);
602 static int f2fs_freeze(struct super_block
*sb
)
606 if (f2fs_readonly(sb
))
609 err
= f2fs_sync_fs(sb
, 1);
613 static int f2fs_unfreeze(struct super_block
*sb
)
618 static int f2fs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
620 struct super_block
*sb
= dentry
->d_sb
;
621 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
622 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
623 block_t total_count
, user_block_count
, start_count
, ovp_count
;
625 total_count
= le64_to_cpu(sbi
->raw_super
->block_count
);
626 user_block_count
= sbi
->user_block_count
;
627 start_count
= le32_to_cpu(sbi
->raw_super
->segment0_blkaddr
);
628 ovp_count
= SM_I(sbi
)->ovp_segments
<< sbi
->log_blocks_per_seg
;
629 buf
->f_type
= F2FS_SUPER_MAGIC
;
630 buf
->f_bsize
= sbi
->blocksize
;
632 buf
->f_blocks
= total_count
- start_count
;
633 buf
->f_bfree
= buf
->f_blocks
- valid_user_blocks(sbi
) - ovp_count
;
634 buf
->f_bavail
= user_block_count
- valid_user_blocks(sbi
);
636 buf
->f_files
= sbi
->total_node_count
- F2FS_RESERVED_NODE_NUM
;
637 buf
->f_ffree
= buf
->f_files
- valid_inode_count(sbi
);
639 buf
->f_namelen
= F2FS_NAME_LEN
;
640 buf
->f_fsid
.val
[0] = (u32
)id
;
641 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
646 static int f2fs_show_options(struct seq_file
*seq
, struct dentry
*root
)
648 struct f2fs_sb_info
*sbi
= F2FS_SB(root
->d_sb
);
650 if (!f2fs_readonly(sbi
->sb
) && test_opt(sbi
, BG_GC
)) {
651 if (test_opt(sbi
, FORCE_FG_GC
))
652 seq_printf(seq
, ",background_gc=%s", "sync");
654 seq_printf(seq
, ",background_gc=%s", "on");
656 seq_printf(seq
, ",background_gc=%s", "off");
658 if (test_opt(sbi
, DISABLE_ROLL_FORWARD
))
659 seq_puts(seq
, ",disable_roll_forward");
660 if (test_opt(sbi
, DISCARD
))
661 seq_puts(seq
, ",discard");
662 if (test_opt(sbi
, NOHEAP
))
663 seq_puts(seq
, ",no_heap_alloc");
664 #ifdef CONFIG_F2FS_FS_XATTR
665 if (test_opt(sbi
, XATTR_USER
))
666 seq_puts(seq
, ",user_xattr");
668 seq_puts(seq
, ",nouser_xattr");
669 if (test_opt(sbi
, INLINE_XATTR
))
670 seq_puts(seq
, ",inline_xattr");
672 #ifdef CONFIG_F2FS_FS_POSIX_ACL
673 if (test_opt(sbi
, POSIX_ACL
))
674 seq_puts(seq
, ",acl");
676 seq_puts(seq
, ",noacl");
678 if (test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
679 seq_puts(seq
, ",disable_ext_identify");
680 if (test_opt(sbi
, INLINE_DATA
))
681 seq_puts(seq
, ",inline_data");
683 seq_puts(seq
, ",noinline_data");
684 if (test_opt(sbi
, INLINE_DENTRY
))
685 seq_puts(seq
, ",inline_dentry");
686 if (!f2fs_readonly(sbi
->sb
) && test_opt(sbi
, FLUSH_MERGE
))
687 seq_puts(seq
, ",flush_merge");
688 if (test_opt(sbi
, NOBARRIER
))
689 seq_puts(seq
, ",nobarrier");
690 if (test_opt(sbi
, FASTBOOT
))
691 seq_puts(seq
, ",fastboot");
692 if (test_opt(sbi
, EXTENT_CACHE
))
693 seq_puts(seq
, ",extent_cache");
695 seq_puts(seq
, ",noextent_cache");
696 if (test_opt(sbi
, DATA_FLUSH
))
697 seq_puts(seq
, ",data_flush");
698 seq_printf(seq
, ",active_logs=%u", sbi
->active_logs
);
703 static int segment_info_seq_show(struct seq_file
*seq
, void *offset
)
705 struct super_block
*sb
= seq
->private;
706 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
707 unsigned int total_segs
=
708 le32_to_cpu(sbi
->raw_super
->segment_count_main
);
711 seq_puts(seq
, "format: segment_type|valid_blocks\n"
712 "segment_type(0:HD, 1:WD, 2:CD, 3:HN, 4:WN, 5:CN)\n");
714 for (i
= 0; i
< total_segs
; i
++) {
715 struct seg_entry
*se
= get_seg_entry(sbi
, i
);
718 seq_printf(seq
, "%-10d", i
);
719 seq_printf(seq
, "%d|%-3u", se
->type
,
720 get_valid_blocks(sbi
, i
, 1));
721 if ((i
% 10) == 9 || i
== (total_segs
- 1))
730 static int segment_info_open_fs(struct inode
*inode
, struct file
*file
)
732 return single_open(file
, segment_info_seq_show
, PDE_DATA(inode
));
735 static const struct file_operations f2fs_seq_segment_info_fops
= {
736 .owner
= THIS_MODULE
,
737 .open
= segment_info_open_fs
,
740 .release
= single_release
,
743 static void default_options(struct f2fs_sb_info
*sbi
)
745 /* init some FS parameters */
746 sbi
->active_logs
= NR_CURSEG_TYPE
;
749 set_opt(sbi
, INLINE_DATA
);
750 set_opt(sbi
, EXTENT_CACHE
);
752 #ifdef CONFIG_F2FS_FS_XATTR
753 set_opt(sbi
, XATTR_USER
);
755 #ifdef CONFIG_F2FS_FS_POSIX_ACL
756 set_opt(sbi
, POSIX_ACL
);
760 static int f2fs_remount(struct super_block
*sb
, int *flags
, char *data
)
762 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
763 struct f2fs_mount_info org_mount_opt
;
764 int err
, active_logs
;
765 bool need_restart_gc
= false;
766 bool need_stop_gc
= false;
767 bool no_extent_cache
= !test_opt(sbi
, EXTENT_CACHE
);
772 * Save the old mount options in case we
773 * need to restore them.
775 org_mount_opt
= sbi
->mount_opt
;
776 active_logs
= sbi
->active_logs
;
778 sbi
->mount_opt
.opt
= 0;
779 default_options(sbi
);
781 /* parse mount options */
782 err
= parse_options(sb
, data
);
787 * Previous and new state of filesystem is RO,
788 * so skip checking GC and FLUSH_MERGE conditions.
790 if (f2fs_readonly(sb
) && (*flags
& MS_RDONLY
))
793 /* disallow enable/disable extent_cache dynamically */
794 if (no_extent_cache
== !!test_opt(sbi
, EXTENT_CACHE
)) {
796 f2fs_msg(sbi
->sb
, KERN_WARNING
,
797 "switch extent_cache option is not allowed");
802 * We stop the GC thread if FS is mounted as RO
803 * or if background_gc = off is passed in mount
804 * option. Also sync the filesystem.
806 if ((*flags
& MS_RDONLY
) || !test_opt(sbi
, BG_GC
)) {
807 if (sbi
->gc_thread
) {
810 need_restart_gc
= true;
812 } else if (!sbi
->gc_thread
) {
813 err
= start_gc_thread(sbi
);
820 * We stop issue flush thread if FS is mounted as RO
821 * or if flush_merge is not passed in mount option.
823 if ((*flags
& MS_RDONLY
) || !test_opt(sbi
, FLUSH_MERGE
)) {
824 destroy_flush_cmd_control(sbi
);
825 } else if (!SM_I(sbi
)->cmd_control_info
) {
826 err
= create_flush_cmd_control(sbi
);
831 /* Update the POSIXACL Flag */
832 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
833 (test_opt(sbi
, POSIX_ACL
) ? MS_POSIXACL
: 0);
836 if (need_restart_gc
) {
837 if (start_gc_thread(sbi
))
838 f2fs_msg(sbi
->sb
, KERN_WARNING
,
839 "background gc thread has stopped");
840 } else if (need_stop_gc
) {
844 sbi
->mount_opt
= org_mount_opt
;
845 sbi
->active_logs
= active_logs
;
849 static struct super_operations f2fs_sops
= {
850 .alloc_inode
= f2fs_alloc_inode
,
851 .drop_inode
= f2fs_drop_inode
,
852 .destroy_inode
= f2fs_destroy_inode
,
853 .write_inode
= f2fs_write_inode
,
854 .dirty_inode
= f2fs_dirty_inode
,
855 .show_options
= f2fs_show_options
,
856 .evict_inode
= f2fs_evict_inode
,
857 .put_super
= f2fs_put_super
,
858 .sync_fs
= f2fs_sync_fs
,
859 .freeze_fs
= f2fs_freeze
,
860 .unfreeze_fs
= f2fs_unfreeze
,
861 .statfs
= f2fs_statfs
,
862 .remount_fs
= f2fs_remount
,
865 static struct inode
*f2fs_nfs_get_inode(struct super_block
*sb
,
866 u64 ino
, u32 generation
)
868 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
871 if (check_nid_range(sbi
, ino
))
872 return ERR_PTR(-ESTALE
);
875 * f2fs_iget isn't quite right if the inode is currently unallocated!
876 * However f2fs_iget currently does appropriate checks to handle stale
877 * inodes so everything is OK.
879 inode
= f2fs_iget(sb
, ino
);
881 return ERR_CAST(inode
);
882 if (unlikely(generation
&& inode
->i_generation
!= generation
)) {
883 /* we didn't find the right inode.. */
885 return ERR_PTR(-ESTALE
);
890 static struct dentry
*f2fs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
891 int fh_len
, int fh_type
)
893 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
897 static struct dentry
*f2fs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
898 int fh_len
, int fh_type
)
900 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
904 static const struct export_operations f2fs_export_ops
= {
905 .fh_to_dentry
= f2fs_fh_to_dentry
,
906 .fh_to_parent
= f2fs_fh_to_parent
,
907 .get_parent
= f2fs_get_parent
,
910 static loff_t
max_file_blocks(void)
912 loff_t result
= (DEF_ADDRS_PER_INODE
- F2FS_INLINE_XATTR_ADDRS
);
913 loff_t leaf_count
= ADDRS_PER_BLOCK
;
915 /* two direct node blocks */
916 result
+= (leaf_count
* 2);
918 /* two indirect node blocks */
919 leaf_count
*= NIDS_PER_BLOCK
;
920 result
+= (leaf_count
* 2);
922 /* one double indirect node block */
923 leaf_count
*= NIDS_PER_BLOCK
;
924 result
+= leaf_count
;
929 static inline bool sanity_check_area_boundary(struct super_block
*sb
,
930 struct f2fs_super_block
*raw_super
)
932 u32 segment0_blkaddr
= le32_to_cpu(raw_super
->segment0_blkaddr
);
933 u32 cp_blkaddr
= le32_to_cpu(raw_super
->cp_blkaddr
);
934 u32 sit_blkaddr
= le32_to_cpu(raw_super
->sit_blkaddr
);
935 u32 nat_blkaddr
= le32_to_cpu(raw_super
->nat_blkaddr
);
936 u32 ssa_blkaddr
= le32_to_cpu(raw_super
->ssa_blkaddr
);
937 u32 main_blkaddr
= le32_to_cpu(raw_super
->main_blkaddr
);
938 u32 segment_count_ckpt
= le32_to_cpu(raw_super
->segment_count_ckpt
);
939 u32 segment_count_sit
= le32_to_cpu(raw_super
->segment_count_sit
);
940 u32 segment_count_nat
= le32_to_cpu(raw_super
->segment_count_nat
);
941 u32 segment_count_ssa
= le32_to_cpu(raw_super
->segment_count_ssa
);
942 u32 segment_count_main
= le32_to_cpu(raw_super
->segment_count_main
);
943 u32 segment_count
= le32_to_cpu(raw_super
->segment_count
);
944 u32 log_blocks_per_seg
= le32_to_cpu(raw_super
->log_blocks_per_seg
);
946 if (segment0_blkaddr
!= cp_blkaddr
) {
947 f2fs_msg(sb
, KERN_INFO
,
948 "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
949 segment0_blkaddr
, cp_blkaddr
);
953 if (cp_blkaddr
+ (segment_count_ckpt
<< log_blocks_per_seg
) !=
955 f2fs_msg(sb
, KERN_INFO
,
956 "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
957 cp_blkaddr
, sit_blkaddr
,
958 segment_count_ckpt
<< log_blocks_per_seg
);
962 if (sit_blkaddr
+ (segment_count_sit
<< log_blocks_per_seg
) !=
964 f2fs_msg(sb
, KERN_INFO
,
965 "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
966 sit_blkaddr
, nat_blkaddr
,
967 segment_count_sit
<< log_blocks_per_seg
);
971 if (nat_blkaddr
+ (segment_count_nat
<< log_blocks_per_seg
) !=
973 f2fs_msg(sb
, KERN_INFO
,
974 "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
975 nat_blkaddr
, ssa_blkaddr
,
976 segment_count_nat
<< log_blocks_per_seg
);
980 if (ssa_blkaddr
+ (segment_count_ssa
<< log_blocks_per_seg
) !=
982 f2fs_msg(sb
, KERN_INFO
,
983 "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
984 ssa_blkaddr
, main_blkaddr
,
985 segment_count_ssa
<< log_blocks_per_seg
);
989 if (main_blkaddr
+ (segment_count_main
<< log_blocks_per_seg
) !=
990 segment0_blkaddr
+ (segment_count
<< log_blocks_per_seg
)) {
991 f2fs_msg(sb
, KERN_INFO
,
992 "Wrong MAIN_AREA boundary, start(%u) end(%u) blocks(%u)",
994 segment0_blkaddr
+ (segment_count
<< log_blocks_per_seg
),
995 segment_count_main
<< log_blocks_per_seg
);
1002 static int sanity_check_raw_super(struct super_block
*sb
,
1003 struct f2fs_super_block
*raw_super
)
1005 unsigned int blocksize
;
1007 if (F2FS_SUPER_MAGIC
!= le32_to_cpu(raw_super
->magic
)) {
1008 f2fs_msg(sb
, KERN_INFO
,
1009 "Magic Mismatch, valid(0x%x) - read(0x%x)",
1010 F2FS_SUPER_MAGIC
, le32_to_cpu(raw_super
->magic
));
1014 /* Currently, support only 4KB page cache size */
1015 if (F2FS_BLKSIZE
!= PAGE_CACHE_SIZE
) {
1016 f2fs_msg(sb
, KERN_INFO
,
1017 "Invalid page_cache_size (%lu), supports only 4KB\n",
1022 /* Currently, support only 4KB block size */
1023 blocksize
= 1 << le32_to_cpu(raw_super
->log_blocksize
);
1024 if (blocksize
!= F2FS_BLKSIZE
) {
1025 f2fs_msg(sb
, KERN_INFO
,
1026 "Invalid blocksize (%u), supports only 4KB\n",
1031 /* check log blocks per segment */
1032 if (le32_to_cpu(raw_super
->log_blocks_per_seg
) != 9) {
1033 f2fs_msg(sb
, KERN_INFO
,
1034 "Invalid log blocks per segment (%u)\n",
1035 le32_to_cpu(raw_super
->log_blocks_per_seg
));
1039 /* Currently, support 512/1024/2048/4096 bytes sector size */
1040 if (le32_to_cpu(raw_super
->log_sectorsize
) >
1041 F2FS_MAX_LOG_SECTOR_SIZE
||
1042 le32_to_cpu(raw_super
->log_sectorsize
) <
1043 F2FS_MIN_LOG_SECTOR_SIZE
) {
1044 f2fs_msg(sb
, KERN_INFO
, "Invalid log sectorsize (%u)",
1045 le32_to_cpu(raw_super
->log_sectorsize
));
1048 if (le32_to_cpu(raw_super
->log_sectors_per_block
) +
1049 le32_to_cpu(raw_super
->log_sectorsize
) !=
1050 F2FS_MAX_LOG_SECTOR_SIZE
) {
1051 f2fs_msg(sb
, KERN_INFO
,
1052 "Invalid log sectors per block(%u) log sectorsize(%u)",
1053 le32_to_cpu(raw_super
->log_sectors_per_block
),
1054 le32_to_cpu(raw_super
->log_sectorsize
));
1058 /* check reserved ino info */
1059 if (le32_to_cpu(raw_super
->node_ino
) != 1 ||
1060 le32_to_cpu(raw_super
->meta_ino
) != 2 ||
1061 le32_to_cpu(raw_super
->root_ino
) != 3) {
1062 f2fs_msg(sb
, KERN_INFO
,
1063 "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
1064 le32_to_cpu(raw_super
->node_ino
),
1065 le32_to_cpu(raw_super
->meta_ino
),
1066 le32_to_cpu(raw_super
->root_ino
));
1070 /* check CP/SIT/NAT/SSA/MAIN_AREA area boundary */
1071 if (sanity_check_area_boundary(sb
, raw_super
))
1077 static int sanity_check_ckpt(struct f2fs_sb_info
*sbi
)
1079 unsigned int total
, fsmeta
;
1080 struct f2fs_super_block
*raw_super
= F2FS_RAW_SUPER(sbi
);
1081 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1083 total
= le32_to_cpu(raw_super
->segment_count
);
1084 fsmeta
= le32_to_cpu(raw_super
->segment_count_ckpt
);
1085 fsmeta
+= le32_to_cpu(raw_super
->segment_count_sit
);
1086 fsmeta
+= le32_to_cpu(raw_super
->segment_count_nat
);
1087 fsmeta
+= le32_to_cpu(ckpt
->rsvd_segment_count
);
1088 fsmeta
+= le32_to_cpu(raw_super
->segment_count_ssa
);
1090 if (unlikely(fsmeta
>= total
))
1093 if (unlikely(f2fs_cp_error(sbi
))) {
1094 f2fs_msg(sbi
->sb
, KERN_ERR
, "A bug case: need to run fsck");
1100 static void init_sb_info(struct f2fs_sb_info
*sbi
)
1102 struct f2fs_super_block
*raw_super
= sbi
->raw_super
;
1105 sbi
->log_sectors_per_block
=
1106 le32_to_cpu(raw_super
->log_sectors_per_block
);
1107 sbi
->log_blocksize
= le32_to_cpu(raw_super
->log_blocksize
);
1108 sbi
->blocksize
= 1 << sbi
->log_blocksize
;
1109 sbi
->log_blocks_per_seg
= le32_to_cpu(raw_super
->log_blocks_per_seg
);
1110 sbi
->blocks_per_seg
= 1 << sbi
->log_blocks_per_seg
;
1111 sbi
->segs_per_sec
= le32_to_cpu(raw_super
->segs_per_sec
);
1112 sbi
->secs_per_zone
= le32_to_cpu(raw_super
->secs_per_zone
);
1113 sbi
->total_sections
= le32_to_cpu(raw_super
->section_count
);
1114 sbi
->total_node_count
=
1115 (le32_to_cpu(raw_super
->segment_count_nat
) / 2)
1116 * sbi
->blocks_per_seg
* NAT_ENTRY_PER_BLOCK
;
1117 sbi
->root_ino_num
= le32_to_cpu(raw_super
->root_ino
);
1118 sbi
->node_ino_num
= le32_to_cpu(raw_super
->node_ino
);
1119 sbi
->meta_ino_num
= le32_to_cpu(raw_super
->meta_ino
);
1120 sbi
->cur_victim_sec
= NULL_SECNO
;
1121 sbi
->max_victim_search
= DEF_MAX_VICTIM_SEARCH
;
1123 for (i
= 0; i
< NR_COUNT_TYPE
; i
++)
1124 atomic_set(&sbi
->nr_pages
[i
], 0);
1126 sbi
->dir_level
= DEF_DIR_LEVEL
;
1127 sbi
->interval_time
[CP_TIME
] = DEF_CP_INTERVAL
;
1128 sbi
->interval_time
[REQ_TIME
] = DEF_IDLE_INTERVAL
;
1129 clear_sbi_flag(sbi
, SBI_NEED_FSCK
);
1131 INIT_LIST_HEAD(&sbi
->s_list
);
1132 mutex_init(&sbi
->umount_mutex
);
1136 * Read f2fs raw super block.
1137 * Because we have two copies of super block, so read the first one at first,
1138 * if the first one is invalid, move to read the second one.
1140 static int read_raw_super_block(struct super_block
*sb
,
1141 struct f2fs_super_block
**raw_super
,
1142 int *valid_super_block
, int *recovery
)
1145 struct buffer_head
*bh
;
1146 struct f2fs_super_block
*super
, *buf
;
1149 super
= kzalloc(sizeof(struct f2fs_super_block
), GFP_KERNEL
);
1153 bh
= sb_bread(sb
, block
);
1156 f2fs_msg(sb
, KERN_ERR
, "Unable to read %dth superblock",
1162 buf
= (struct f2fs_super_block
*)(bh
->b_data
+ F2FS_SUPER_OFFSET
);
1164 /* sanity checking of raw super */
1165 if (sanity_check_raw_super(sb
, buf
)) {
1168 f2fs_msg(sb
, KERN_ERR
,
1169 "Can't find valid F2FS filesystem in %dth superblock",
1176 memcpy(super
, buf
, sizeof(*super
));
1177 *valid_super_block
= block
;
1183 /* check the validity of the second superblock */
1189 /* No valid superblock */
1198 static int __f2fs_commit_super(struct f2fs_sb_info
*sbi
, int block
)
1200 struct f2fs_super_block
*super
= F2FS_RAW_SUPER(sbi
);
1201 struct buffer_head
*bh
;
1204 bh
= sb_getblk(sbi
->sb
, block
);
1209 memcpy(bh
->b_data
+ F2FS_SUPER_OFFSET
, super
, sizeof(*super
));
1210 set_buffer_uptodate(bh
);
1211 set_buffer_dirty(bh
);
1214 /* it's rare case, we can do fua all the time */
1215 err
= __sync_dirty_buffer(bh
, WRITE_FLUSH_FUA
);
1221 int f2fs_commit_super(struct f2fs_sb_info
*sbi
, bool recover
)
1225 /* write back-up superblock first */
1226 err
= __f2fs_commit_super(sbi
, sbi
->valid_super_block
? 0 : 1);
1228 /* if we are in recovery path, skip writing valid superblock */
1232 /* write current valid superblock */
1233 return __f2fs_commit_super(sbi
, sbi
->valid_super_block
);
1236 static int f2fs_fill_super(struct super_block
*sb
, void *data
, int silent
)
1238 struct f2fs_sb_info
*sbi
;
1239 struct f2fs_super_block
*raw_super
;
1242 bool retry
= true, need_fsck
= false;
1243 char *options
= NULL
;
1244 int recovery
, i
, valid_super_block
;
1249 valid_super_block
= -1;
1252 /* allocate memory for f2fs-specific super block info */
1253 sbi
= kzalloc(sizeof(struct f2fs_sb_info
), GFP_KERNEL
);
1257 /* set a block size */
1258 if (unlikely(!sb_set_blocksize(sb
, F2FS_BLKSIZE
))) {
1259 f2fs_msg(sb
, KERN_ERR
, "unable to set blocksize");
1263 err
= read_raw_super_block(sb
, &raw_super
, &valid_super_block
,
1268 sb
->s_fs_info
= sbi
;
1269 default_options(sbi
);
1270 /* parse mount options */
1271 options
= kstrdup((const char *)data
, GFP_KERNEL
);
1272 if (data
&& !options
) {
1277 err
= parse_options(sb
, options
);
1281 sbi
->max_file_blocks
= max_file_blocks();
1282 sb
->s_maxbytes
= sbi
->max_file_blocks
<<
1283 le32_to_cpu(raw_super
->log_blocksize
);
1284 sb
->s_max_links
= F2FS_LINK_MAX
;
1285 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1287 sb
->s_op
= &f2fs_sops
;
1288 sb
->s_xattr
= f2fs_xattr_handlers
;
1289 sb
->s_export_op
= &f2fs_export_ops
;
1290 sb
->s_magic
= F2FS_SUPER_MAGIC
;
1291 sb
->s_time_gran
= 1;
1292 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1293 (test_opt(sbi
, POSIX_ACL
) ? MS_POSIXACL
: 0);
1294 memcpy(sb
->s_uuid
, raw_super
->uuid
, sizeof(raw_super
->uuid
));
1296 /* init f2fs-specific super block info */
1298 sbi
->raw_super
= raw_super
;
1299 sbi
->valid_super_block
= valid_super_block
;
1300 mutex_init(&sbi
->gc_mutex
);
1301 mutex_init(&sbi
->writepages
);
1302 mutex_init(&sbi
->cp_mutex
);
1303 init_rwsem(&sbi
->node_write
);
1305 /* disallow all the data/node/meta page writes */
1306 set_sbi_flag(sbi
, SBI_POR_DOING
);
1307 spin_lock_init(&sbi
->stat_lock
);
1309 init_rwsem(&sbi
->read_io
.io_rwsem
);
1310 sbi
->read_io
.sbi
= sbi
;
1311 sbi
->read_io
.bio
= NULL
;
1312 for (i
= 0; i
< NR_PAGE_TYPE
; i
++) {
1313 init_rwsem(&sbi
->write_io
[i
].io_rwsem
);
1314 sbi
->write_io
[i
].sbi
= sbi
;
1315 sbi
->write_io
[i
].bio
= NULL
;
1318 init_rwsem(&sbi
->cp_rwsem
);
1319 init_waitqueue_head(&sbi
->cp_wait
);
1322 /* get an inode for meta space */
1323 sbi
->meta_inode
= f2fs_iget(sb
, F2FS_META_INO(sbi
));
1324 if (IS_ERR(sbi
->meta_inode
)) {
1325 f2fs_msg(sb
, KERN_ERR
, "Failed to read F2FS meta data inode");
1326 err
= PTR_ERR(sbi
->meta_inode
);
1330 err
= get_valid_checkpoint(sbi
);
1332 f2fs_msg(sb
, KERN_ERR
, "Failed to get valid F2FS checkpoint");
1333 goto free_meta_inode
;
1336 /* sanity checking of checkpoint */
1338 if (sanity_check_ckpt(sbi
)) {
1339 f2fs_msg(sb
, KERN_ERR
, "Invalid F2FS checkpoint");
1343 sbi
->total_valid_node_count
=
1344 le32_to_cpu(sbi
->ckpt
->valid_node_count
);
1345 sbi
->total_valid_inode_count
=
1346 le32_to_cpu(sbi
->ckpt
->valid_inode_count
);
1347 sbi
->user_block_count
= le64_to_cpu(sbi
->ckpt
->user_block_count
);
1348 sbi
->total_valid_block_count
=
1349 le64_to_cpu(sbi
->ckpt
->valid_block_count
);
1350 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
1351 sbi
->alloc_valid_block_count
= 0;
1352 for (i
= 0; i
< NR_INODE_TYPE
; i
++) {
1353 INIT_LIST_HEAD(&sbi
->inode_list
[i
]);
1354 spin_lock_init(&sbi
->inode_lock
[i
]);
1357 init_extent_cache_info(sbi
);
1359 init_ino_entry_info(sbi
);
1361 /* setup f2fs internal modules */
1362 err
= build_segment_manager(sbi
);
1364 f2fs_msg(sb
, KERN_ERR
,
1365 "Failed to initialize F2FS segment manager");
1368 err
= build_node_manager(sbi
);
1370 f2fs_msg(sb
, KERN_ERR
,
1371 "Failed to initialize F2FS node manager");
1375 build_gc_manager(sbi
);
1377 /* get an inode for node space */
1378 sbi
->node_inode
= f2fs_iget(sb
, F2FS_NODE_INO(sbi
));
1379 if (IS_ERR(sbi
->node_inode
)) {
1380 f2fs_msg(sb
, KERN_ERR
, "Failed to read node inode");
1381 err
= PTR_ERR(sbi
->node_inode
);
1385 f2fs_join_shrinker(sbi
);
1387 /* if there are nt orphan nodes free them */
1388 err
= recover_orphan_inodes(sbi
);
1390 goto free_node_inode
;
1392 /* read root inode and dentry */
1393 root
= f2fs_iget(sb
, F2FS_ROOT_INO(sbi
));
1395 f2fs_msg(sb
, KERN_ERR
, "Failed to read root inode");
1396 err
= PTR_ERR(root
);
1397 goto free_node_inode
;
1399 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1402 goto free_node_inode
;
1405 sb
->s_root
= d_make_root(root
); /* allocate root dentry */
1408 goto free_root_inode
;
1411 err
= f2fs_build_stats(sbi
);
1413 goto free_root_inode
;
1416 sbi
->s_proc
= proc_mkdir(sb
->s_id
, f2fs_proc_root
);
1419 proc_create_data("segment_info", S_IRUGO
, sbi
->s_proc
,
1420 &f2fs_seq_segment_info_fops
, sb
);
1422 sbi
->s_kobj
.kset
= f2fs_kset
;
1423 init_completion(&sbi
->s_kobj_unregister
);
1424 err
= kobject_init_and_add(&sbi
->s_kobj
, &f2fs_ktype
, NULL
,
1429 /* recover fsynced data */
1430 if (!test_opt(sbi
, DISABLE_ROLL_FORWARD
)) {
1432 * mount should be failed, when device has readonly mode, and
1433 * previous checkpoint was not done by clean system shutdown.
1435 if (bdev_read_only(sb
->s_bdev
) &&
1436 !is_set_ckpt_flags(sbi
->ckpt
, CP_UMOUNT_FLAG
)) {
1442 set_sbi_flag(sbi
, SBI_NEED_FSCK
);
1444 err
= recover_fsync_data(sbi
);
1447 f2fs_msg(sb
, KERN_ERR
,
1448 "Cannot recover all fsync data errno=%ld", err
);
1452 /* recover_fsync_data() cleared this already */
1453 clear_sbi_flag(sbi
, SBI_POR_DOING
);
1456 * If filesystem is not mounted as read-only then
1457 * do start the gc_thread.
1459 if (test_opt(sbi
, BG_GC
) && !f2fs_readonly(sb
)) {
1460 /* After POR, we can run background GC thread.*/
1461 err
= start_gc_thread(sbi
);
1467 /* recover broken superblock */
1468 if (recovery
&& !f2fs_readonly(sb
) && !bdev_read_only(sb
->s_bdev
)) {
1469 f2fs_msg(sb
, KERN_INFO
, "Recover invalid superblock");
1470 f2fs_commit_super(sbi
, true);
1473 f2fs_update_time(sbi
, CP_TIME
);
1474 f2fs_update_time(sbi
, REQ_TIME
);
1478 kobject_del(&sbi
->s_kobj
);
1479 kobject_put(&sbi
->s_kobj
);
1480 wait_for_completion(&sbi
->s_kobj_unregister
);
1483 remove_proc_entry("segment_info", sbi
->s_proc
);
1484 remove_proc_entry(sb
->s_id
, f2fs_proc_root
);
1486 f2fs_destroy_stats(sbi
);
1491 mutex_lock(&sbi
->umount_mutex
);
1492 f2fs_leave_shrinker(sbi
);
1493 iput(sbi
->node_inode
);
1494 mutex_unlock(&sbi
->umount_mutex
);
1496 destroy_node_manager(sbi
);
1498 destroy_segment_manager(sbi
);
1502 make_bad_inode(sbi
->meta_inode
);
1503 iput(sbi
->meta_inode
);
1511 /* give only one another chance */
1514 shrink_dcache_sb(sb
);
1520 static struct dentry
*f2fs_mount(struct file_system_type
*fs_type
, int flags
,
1521 const char *dev_name
, void *data
)
1523 return mount_bdev(fs_type
, flags
, dev_name
, data
, f2fs_fill_super
);
1526 static void kill_f2fs_super(struct super_block
*sb
)
1529 set_sbi_flag(F2FS_SB(sb
), SBI_IS_CLOSE
);
1530 kill_block_super(sb
);
1533 static struct file_system_type f2fs_fs_type
= {
1534 .owner
= THIS_MODULE
,
1536 .mount
= f2fs_mount
,
1537 .kill_sb
= kill_f2fs_super
,
1538 .fs_flags
= FS_REQUIRES_DEV
,
1540 MODULE_ALIAS_FS("f2fs");
1542 static int __init
init_inodecache(void)
1544 f2fs_inode_cachep
= kmem_cache_create("f2fs_inode_cache",
1545 sizeof(struct f2fs_inode_info
), 0,
1546 SLAB_RECLAIM_ACCOUNT
|SLAB_ACCOUNT
, NULL
);
1547 if (!f2fs_inode_cachep
)
1552 static void destroy_inodecache(void)
1555 * Make sure all delayed rcu free inodes are flushed before we
1559 kmem_cache_destroy(f2fs_inode_cachep
);
1562 static int __init
init_f2fs_fs(void)
1566 f2fs_build_trace_ios();
1568 err
= init_inodecache();
1571 err
= create_node_manager_caches();
1573 goto free_inodecache
;
1574 err
= create_segment_manager_caches();
1576 goto free_node_manager_caches
;
1577 err
= create_checkpoint_caches();
1579 goto free_segment_manager_caches
;
1580 err
= create_extent_cache();
1582 goto free_checkpoint_caches
;
1583 f2fs_kset
= kset_create_and_add("f2fs", NULL
, fs_kobj
);
1586 goto free_extent_cache
;
1588 err
= f2fs_init_crypto();
1592 err
= register_shrinker(&f2fs_shrinker_info
);
1596 err
= register_filesystem(&f2fs_fs_type
);
1599 err
= f2fs_create_root_stats();
1601 goto free_filesystem
;
1602 f2fs_proc_root
= proc_mkdir("fs/f2fs", NULL
);
1606 unregister_filesystem(&f2fs_fs_type
);
1608 unregister_shrinker(&f2fs_shrinker_info
);
1612 kset_unregister(f2fs_kset
);
1614 destroy_extent_cache();
1615 free_checkpoint_caches
:
1616 destroy_checkpoint_caches();
1617 free_segment_manager_caches
:
1618 destroy_segment_manager_caches();
1619 free_node_manager_caches
:
1620 destroy_node_manager_caches();
1622 destroy_inodecache();
1627 static void __exit
exit_f2fs_fs(void)
1629 remove_proc_entry("fs/f2fs", NULL
);
1630 f2fs_destroy_root_stats();
1631 unregister_shrinker(&f2fs_shrinker_info
);
1632 unregister_filesystem(&f2fs_fs_type
);
1634 destroy_extent_cache();
1635 destroy_checkpoint_caches();
1636 destroy_segment_manager_caches();
1637 destroy_node_manager_caches();
1638 destroy_inodecache();
1639 kset_unregister(f2fs_kset
);
1640 f2fs_destroy_trace_ios();
1643 module_init(init_f2fs_fs
)
1644 module_exit(exit_f2fs_fs
)
1646 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1647 MODULE_DESCRIPTION("Flash Friendly File System");
1648 MODULE_LICENSE("GPL");