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>
34 #define CREATE_TRACE_POINTS
35 #include <trace/events/f2fs.h>
37 static struct proc_dir_entry
*f2fs_proc_root
;
38 static struct kmem_cache
*f2fs_inode_cachep
;
39 static struct kset
*f2fs_kset
;
43 Opt_disable_roll_forward
,
51 Opt_disable_ext_identify
,
57 static match_table_t f2fs_tokens
= {
58 {Opt_gc_background
, "background_gc=%s"},
59 {Opt_disable_roll_forward
, "disable_roll_forward"},
60 {Opt_discard
, "discard"},
61 {Opt_noheap
, "no_heap"},
62 {Opt_user_xattr
, "user_xattr"},
63 {Opt_nouser_xattr
, "nouser_xattr"},
66 {Opt_active_logs
, "active_logs=%u"},
67 {Opt_disable_ext_identify
, "disable_ext_identify"},
68 {Opt_inline_xattr
, "inline_xattr"},
69 {Opt_inline_data
, "inline_data"},
73 /* Sysfs support for f2fs */
75 GC_THREAD
, /* struct f2fs_gc_thread */
76 SM_INFO
, /* struct f2fs_sm_info */
77 F2FS_SBI
, /* struct f2fs_sb_info */
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);
89 static unsigned char *__struct_ptr(struct f2fs_sb_info
*sbi
, int struct_type
)
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
);
95 else if (struct_type
== F2FS_SBI
)
96 return (unsigned char *)sbi
;
100 static ssize_t
f2fs_sbi_show(struct f2fs_attr
*a
,
101 struct f2fs_sb_info
*sbi
, char *buf
)
103 unsigned char *ptr
= NULL
;
106 ptr
= __struct_ptr(sbi
, a
->struct_type
);
110 ui
= (unsigned int *)(ptr
+ a
->offset
);
112 return snprintf(buf
, PAGE_SIZE
, "%u\n", *ui
);
115 static ssize_t
f2fs_sbi_store(struct f2fs_attr
*a
,
116 struct f2fs_sb_info
*sbi
,
117 const char *buf
, size_t count
)
124 ptr
= __struct_ptr(sbi
, a
->struct_type
);
128 ui
= (unsigned int *)(ptr
+ a
->offset
);
130 ret
= kstrtoul(skip_spaces(buf
), 0, &t
);
137 static ssize_t
f2fs_attr_show(struct kobject
*kobj
,
138 struct attribute
*attr
, char *buf
)
140 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
142 struct f2fs_attr
*a
= container_of(attr
, struct f2fs_attr
, attr
);
144 return a
->show
? a
->show(a
, sbi
, buf
) : 0;
147 static ssize_t
f2fs_attr_store(struct kobject
*kobj
, struct attribute
*attr
,
148 const char *buf
, size_t len
)
150 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
152 struct f2fs_attr
*a
= container_of(attr
, struct f2fs_attr
, attr
);
154 return a
->store
? a
->store(a
, sbi
, buf
, len
) : 0;
157 static void f2fs_sb_release(struct kobject
*kobj
)
159 struct f2fs_sb_info
*sbi
= container_of(kobj
, struct f2fs_sb_info
,
161 complete(&sbi
->s_kobj_unregister
);
164 #define F2FS_ATTR_OFFSET(_struct_type, _name, _mode, _show, _store, _offset) \
165 static struct f2fs_attr f2fs_attr_##_name = { \
166 .attr = {.name = __stringify(_name), .mode = _mode }, \
169 .struct_type = _struct_type, \
173 #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))
178 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_min_sleep_time
, min_sleep_time
);
179 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_max_sleep_time
, max_sleep_time
);
180 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_no_gc_sleep_time
, no_gc_sleep_time
);
181 F2FS_RW_ATTR(GC_THREAD
, f2fs_gc_kthread
, gc_idle
, gc_idle
);
182 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, reclaim_segments
, rec_prefree_segments
);
183 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, max_small_discards
, max_discards
);
184 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, ipu_policy
, ipu_policy
);
185 F2FS_RW_ATTR(SM_INFO
, f2fs_sm_info
, min_ipu_util
, min_ipu_util
);
186 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, max_victim_search
, max_victim_search
);
187 F2FS_RW_ATTR(F2FS_SBI
, f2fs_sb_info
, dir_level
, dir_level
);
189 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
190 static struct attribute
*f2fs_attrs
[] = {
191 ATTR_LIST(gc_min_sleep_time
),
192 ATTR_LIST(gc_max_sleep_time
),
193 ATTR_LIST(gc_no_gc_sleep_time
),
195 ATTR_LIST(reclaim_segments
),
196 ATTR_LIST(max_small_discards
),
197 ATTR_LIST(ipu_policy
),
198 ATTR_LIST(min_ipu_util
),
199 ATTR_LIST(max_victim_search
),
200 ATTR_LIST(dir_level
),
204 static const struct sysfs_ops f2fs_attr_ops
= {
205 .show
= f2fs_attr_show
,
206 .store
= f2fs_attr_store
,
209 static struct kobj_type f2fs_ktype
= {
210 .default_attrs
= f2fs_attrs
,
211 .sysfs_ops
= &f2fs_attr_ops
,
212 .release
= f2fs_sb_release
,
215 void f2fs_msg(struct super_block
*sb
, const char *level
, const char *fmt
, ...)
217 struct va_format vaf
;
223 printk("%sF2FS-fs (%s): %pV\n", level
, sb
->s_id
, &vaf
);
227 static void init_once(void *foo
)
229 struct f2fs_inode_info
*fi
= (struct f2fs_inode_info
*) foo
;
231 inode_init_once(&fi
->vfs_inode
);
234 static int parse_options(struct super_block
*sb
, char *options
)
236 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
237 substring_t args
[MAX_OPT_ARGS
];
244 while ((p
= strsep(&options
, ",")) != NULL
) {
249 * Initialize args struct so we know whether arg was
250 * found; some options take optional arguments.
252 args
[0].to
= args
[0].from
= NULL
;
253 token
= match_token(p
, f2fs_tokens
, args
);
256 case Opt_gc_background
:
257 name
= match_strdup(&args
[0]);
261 if (!strncmp(name
, "on", 2))
263 else if (!strncmp(name
, "off", 3))
264 clear_opt(sbi
, BG_GC
);
271 case Opt_disable_roll_forward
:
272 set_opt(sbi
, DISABLE_ROLL_FORWARD
);
275 set_opt(sbi
, DISCARD
);
278 set_opt(sbi
, NOHEAP
);
280 #ifdef CONFIG_F2FS_FS_XATTR
282 set_opt(sbi
, XATTR_USER
);
284 case Opt_nouser_xattr
:
285 clear_opt(sbi
, XATTR_USER
);
287 case Opt_inline_xattr
:
288 set_opt(sbi
, INLINE_XATTR
);
292 f2fs_msg(sb
, KERN_INFO
,
293 "user_xattr options not supported");
295 case Opt_nouser_xattr
:
296 f2fs_msg(sb
, KERN_INFO
,
297 "nouser_xattr options not supported");
299 case Opt_inline_xattr
:
300 f2fs_msg(sb
, KERN_INFO
,
301 "inline_xattr options not supported");
304 #ifdef CONFIG_F2FS_FS_POSIX_ACL
306 set_opt(sbi
, POSIX_ACL
);
309 clear_opt(sbi
, POSIX_ACL
);
313 f2fs_msg(sb
, KERN_INFO
, "acl options not supported");
316 f2fs_msg(sb
, KERN_INFO
, "noacl options not supported");
319 case Opt_active_logs
:
320 if (args
->from
&& match_int(args
, &arg
))
322 if (arg
!= 2 && arg
!= 4 && arg
!= NR_CURSEG_TYPE
)
324 sbi
->active_logs
= arg
;
326 case Opt_disable_ext_identify
:
327 set_opt(sbi
, DISABLE_EXT_IDENTIFY
);
329 case Opt_inline_data
:
330 set_opt(sbi
, INLINE_DATA
);
333 f2fs_msg(sb
, KERN_ERR
,
334 "Unrecognized mount option \"%s\" or missing value",
342 static struct inode
*f2fs_alloc_inode(struct super_block
*sb
)
344 struct f2fs_inode_info
*fi
;
346 fi
= kmem_cache_alloc(f2fs_inode_cachep
, GFP_F2FS_ZERO
);
350 init_once((void *) fi
);
352 /* Initialize f2fs-specific inode info */
353 fi
->vfs_inode
.i_version
= 1;
354 atomic_set(&fi
->dirty_dents
, 0);
355 fi
->i_current_depth
= 1;
357 rwlock_init(&fi
->ext
.ext_lock
);
359 set_inode_flag(fi
, FI_NEW_INODE
);
361 if (test_opt(F2FS_SB(sb
), INLINE_XATTR
))
362 set_inode_flag(fi
, FI_INLINE_XATTR
);
364 /* Will be used by directory only */
365 fi
->i_dir_level
= F2FS_SB(sb
)->dir_level
;
367 return &fi
->vfs_inode
;
370 static int f2fs_drop_inode(struct inode
*inode
)
373 * This is to avoid a deadlock condition like below.
374 * writeback_single_inode(inode)
375 * - f2fs_write_data_page
376 * - f2fs_gc -> iput -> evict
377 * - inode_wait_for_writeback(inode)
379 if (!inode_unhashed(inode
) && inode
->i_state
& I_SYNC
)
381 return generic_drop_inode(inode
);
385 * f2fs_dirty_inode() is called from __mark_inode_dirty()
387 * We should call set_dirty_inode to write the dirty inode through write_inode.
389 static void f2fs_dirty_inode(struct inode
*inode
, int flags
)
391 set_inode_flag(F2FS_I(inode
), FI_DIRTY_INODE
);
394 static void f2fs_i_callback(struct rcu_head
*head
)
396 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
397 kmem_cache_free(f2fs_inode_cachep
, F2FS_I(inode
));
400 static void f2fs_destroy_inode(struct inode
*inode
)
402 call_rcu(&inode
->i_rcu
, f2fs_i_callback
);
405 static void f2fs_put_super(struct super_block
*sb
)
407 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
410 remove_proc_entry("segment_info", sbi
->s_proc
);
411 remove_proc_entry(sb
->s_id
, f2fs_proc_root
);
413 kobject_del(&sbi
->s_kobj
);
415 f2fs_destroy_stats(sbi
);
418 /* We don't need to do checkpoint when it's clean */
419 if (sbi
->s_dirty
&& get_pages(sbi
, F2FS_DIRTY_NODES
))
420 write_checkpoint(sbi
, true);
422 iput(sbi
->node_inode
);
423 iput(sbi
->meta_inode
);
425 /* destroy f2fs internal modules */
426 destroy_node_manager(sbi
);
427 destroy_segment_manager(sbi
);
430 kobject_put(&sbi
->s_kobj
);
431 wait_for_completion(&sbi
->s_kobj_unregister
);
433 sb
->s_fs_info
= NULL
;
434 brelse(sbi
->raw_super_buf
);
438 int f2fs_sync_fs(struct super_block
*sb
, int sync
)
440 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
442 trace_f2fs_sync_fs(sb
, sync
);
444 if (!sbi
->s_dirty
&& !get_pages(sbi
, F2FS_DIRTY_NODES
))
448 mutex_lock(&sbi
->gc_mutex
);
449 write_checkpoint(sbi
, false);
450 mutex_unlock(&sbi
->gc_mutex
);
452 f2fs_balance_fs(sbi
);
458 static int f2fs_freeze(struct super_block
*sb
)
462 if (f2fs_readonly(sb
))
465 err
= f2fs_sync_fs(sb
, 1);
469 static int f2fs_unfreeze(struct super_block
*sb
)
474 static int f2fs_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
476 struct super_block
*sb
= dentry
->d_sb
;
477 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
478 u64 id
= huge_encode_dev(sb
->s_bdev
->bd_dev
);
479 block_t total_count
, user_block_count
, start_count
, ovp_count
;
481 total_count
= le64_to_cpu(sbi
->raw_super
->block_count
);
482 user_block_count
= sbi
->user_block_count
;
483 start_count
= le32_to_cpu(sbi
->raw_super
->segment0_blkaddr
);
484 ovp_count
= SM_I(sbi
)->ovp_segments
<< sbi
->log_blocks_per_seg
;
485 buf
->f_type
= F2FS_SUPER_MAGIC
;
486 buf
->f_bsize
= sbi
->blocksize
;
488 buf
->f_blocks
= total_count
- start_count
;
489 buf
->f_bfree
= buf
->f_blocks
- valid_user_blocks(sbi
) - ovp_count
;
490 buf
->f_bavail
= user_block_count
- valid_user_blocks(sbi
);
492 buf
->f_files
= sbi
->total_node_count
;
493 buf
->f_ffree
= sbi
->total_node_count
- valid_inode_count(sbi
);
495 buf
->f_namelen
= F2FS_NAME_LEN
;
496 buf
->f_fsid
.val
[0] = (u32
)id
;
497 buf
->f_fsid
.val
[1] = (u32
)(id
>> 32);
502 static int f2fs_show_options(struct seq_file
*seq
, struct dentry
*root
)
504 struct f2fs_sb_info
*sbi
= F2FS_SB(root
->d_sb
);
506 if (!(root
->d_sb
->s_flags
& MS_RDONLY
) && test_opt(sbi
, BG_GC
))
507 seq_printf(seq
, ",background_gc=%s", "on");
509 seq_printf(seq
, ",background_gc=%s", "off");
510 if (test_opt(sbi
, DISABLE_ROLL_FORWARD
))
511 seq_puts(seq
, ",disable_roll_forward");
512 if (test_opt(sbi
, DISCARD
))
513 seq_puts(seq
, ",discard");
514 if (test_opt(sbi
, NOHEAP
))
515 seq_puts(seq
, ",no_heap_alloc");
516 #ifdef CONFIG_F2FS_FS_XATTR
517 if (test_opt(sbi
, XATTR_USER
))
518 seq_puts(seq
, ",user_xattr");
520 seq_puts(seq
, ",nouser_xattr");
521 if (test_opt(sbi
, INLINE_XATTR
))
522 seq_puts(seq
, ",inline_xattr");
524 #ifdef CONFIG_F2FS_FS_POSIX_ACL
525 if (test_opt(sbi
, POSIX_ACL
))
526 seq_puts(seq
, ",acl");
528 seq_puts(seq
, ",noacl");
530 if (test_opt(sbi
, DISABLE_EXT_IDENTIFY
))
531 seq_puts(seq
, ",disable_ext_identify");
532 if (test_opt(sbi
, INLINE_DATA
))
533 seq_puts(seq
, ",inline_data");
534 seq_printf(seq
, ",active_logs=%u", sbi
->active_logs
);
539 static int segment_info_seq_show(struct seq_file
*seq
, void *offset
)
541 struct super_block
*sb
= seq
->private;
542 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
543 unsigned int total_segs
=
544 le32_to_cpu(sbi
->raw_super
->segment_count_main
);
547 for (i
= 0; i
< total_segs
; i
++) {
548 seq_printf(seq
, "%u", get_valid_blocks(sbi
, i
, 1));
549 if (i
!= 0 && (i
% 10) == 0)
557 static int segment_info_open_fs(struct inode
*inode
, struct file
*file
)
559 return single_open(file
, segment_info_seq_show
, PDE_DATA(inode
));
562 static const struct file_operations f2fs_seq_segment_info_fops
= {
563 .owner
= THIS_MODULE
,
564 .open
= segment_info_open_fs
,
567 .release
= single_release
,
570 static int f2fs_remount(struct super_block
*sb
, int *flags
, char *data
)
572 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
573 struct f2fs_mount_info org_mount_opt
;
574 int err
, active_logs
;
577 * Save the old mount options in case we
578 * need to restore them.
580 org_mount_opt
= sbi
->mount_opt
;
581 active_logs
= sbi
->active_logs
;
583 /* parse mount options */
584 err
= parse_options(sb
, data
);
589 * Previous and new state of filesystem is RO,
590 * so no point in checking GC conditions.
592 if ((sb
->s_flags
& MS_RDONLY
) && (*flags
& MS_RDONLY
))
596 * We stop the GC thread if FS is mounted as RO
597 * or if background_gc = off is passed in mount
598 * option. Also sync the filesystem.
600 if ((*flags
& MS_RDONLY
) || !test_opt(sbi
, BG_GC
)) {
601 if (sbi
->gc_thread
) {
605 } else if (test_opt(sbi
, BG_GC
) && !sbi
->gc_thread
) {
606 err
= start_gc_thread(sbi
);
611 /* Update the POSIXACL Flag */
612 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
613 (test_opt(sbi
, POSIX_ACL
) ? MS_POSIXACL
: 0);
617 sbi
->mount_opt
= org_mount_opt
;
618 sbi
->active_logs
= active_logs
;
622 static struct super_operations f2fs_sops
= {
623 .alloc_inode
= f2fs_alloc_inode
,
624 .drop_inode
= f2fs_drop_inode
,
625 .destroy_inode
= f2fs_destroy_inode
,
626 .write_inode
= f2fs_write_inode
,
627 .dirty_inode
= f2fs_dirty_inode
,
628 .show_options
= f2fs_show_options
,
629 .evict_inode
= f2fs_evict_inode
,
630 .put_super
= f2fs_put_super
,
631 .sync_fs
= f2fs_sync_fs
,
632 .freeze_fs
= f2fs_freeze
,
633 .unfreeze_fs
= f2fs_unfreeze
,
634 .statfs
= f2fs_statfs
,
635 .remount_fs
= f2fs_remount
,
638 static struct inode
*f2fs_nfs_get_inode(struct super_block
*sb
,
639 u64 ino
, u32 generation
)
641 struct f2fs_sb_info
*sbi
= F2FS_SB(sb
);
644 if (unlikely(ino
< F2FS_ROOT_INO(sbi
)))
645 return ERR_PTR(-ESTALE
);
648 * f2fs_iget isn't quite right if the inode is currently unallocated!
649 * However f2fs_iget currently does appropriate checks to handle stale
650 * inodes so everything is OK.
652 inode
= f2fs_iget(sb
, ino
);
654 return ERR_CAST(inode
);
655 if (unlikely(generation
&& inode
->i_generation
!= generation
)) {
656 /* we didn't find the right inode.. */
658 return ERR_PTR(-ESTALE
);
663 static struct dentry
*f2fs_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
664 int fh_len
, int fh_type
)
666 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
670 static struct dentry
*f2fs_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
671 int fh_len
, int fh_type
)
673 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
677 static const struct export_operations f2fs_export_ops
= {
678 .fh_to_dentry
= f2fs_fh_to_dentry
,
679 .fh_to_parent
= f2fs_fh_to_parent
,
680 .get_parent
= f2fs_get_parent
,
683 static loff_t
max_file_size(unsigned bits
)
685 loff_t result
= (DEF_ADDRS_PER_INODE
- F2FS_INLINE_XATTR_ADDRS
);
686 loff_t leaf_count
= ADDRS_PER_BLOCK
;
688 /* two direct node blocks */
689 result
+= (leaf_count
* 2);
691 /* two indirect node blocks */
692 leaf_count
*= NIDS_PER_BLOCK
;
693 result
+= (leaf_count
* 2);
695 /* one double indirect node block */
696 leaf_count
*= NIDS_PER_BLOCK
;
697 result
+= leaf_count
;
703 static int sanity_check_raw_super(struct super_block
*sb
,
704 struct f2fs_super_block
*raw_super
)
706 unsigned int blocksize
;
708 if (F2FS_SUPER_MAGIC
!= le32_to_cpu(raw_super
->magic
)) {
709 f2fs_msg(sb
, KERN_INFO
,
710 "Magic Mismatch, valid(0x%x) - read(0x%x)",
711 F2FS_SUPER_MAGIC
, le32_to_cpu(raw_super
->magic
));
715 /* Currently, support only 4KB page cache size */
716 if (F2FS_BLKSIZE
!= PAGE_CACHE_SIZE
) {
717 f2fs_msg(sb
, KERN_INFO
,
718 "Invalid page_cache_size (%lu), supports only 4KB\n",
723 /* Currently, support only 4KB block size */
724 blocksize
= 1 << le32_to_cpu(raw_super
->log_blocksize
);
725 if (blocksize
!= F2FS_BLKSIZE
) {
726 f2fs_msg(sb
, KERN_INFO
,
727 "Invalid blocksize (%u), supports only 4KB\n",
732 if (le32_to_cpu(raw_super
->log_sectorsize
) !=
733 F2FS_LOG_SECTOR_SIZE
) {
734 f2fs_msg(sb
, KERN_INFO
, "Invalid log sectorsize");
737 if (le32_to_cpu(raw_super
->log_sectors_per_block
) !=
738 F2FS_LOG_SECTORS_PER_BLOCK
) {
739 f2fs_msg(sb
, KERN_INFO
, "Invalid log sectors per block");
745 static int sanity_check_ckpt(struct f2fs_sb_info
*sbi
)
747 unsigned int total
, fsmeta
;
748 struct f2fs_super_block
*raw_super
= F2FS_RAW_SUPER(sbi
);
749 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
751 total
= le32_to_cpu(raw_super
->segment_count
);
752 fsmeta
= le32_to_cpu(raw_super
->segment_count_ckpt
);
753 fsmeta
+= le32_to_cpu(raw_super
->segment_count_sit
);
754 fsmeta
+= le32_to_cpu(raw_super
->segment_count_nat
);
755 fsmeta
+= le32_to_cpu(ckpt
->rsvd_segment_count
);
756 fsmeta
+= le32_to_cpu(raw_super
->segment_count_ssa
);
758 if (unlikely(fsmeta
>= total
))
761 if (unlikely(is_set_ckpt_flags(ckpt
, CP_ERROR_FLAG
))) {
762 f2fs_msg(sbi
->sb
, KERN_ERR
, "A bug case: need to run fsck");
768 static void init_sb_info(struct f2fs_sb_info
*sbi
)
770 struct f2fs_super_block
*raw_super
= sbi
->raw_super
;
773 sbi
->log_sectors_per_block
=
774 le32_to_cpu(raw_super
->log_sectors_per_block
);
775 sbi
->log_blocksize
= le32_to_cpu(raw_super
->log_blocksize
);
776 sbi
->blocksize
= 1 << sbi
->log_blocksize
;
777 sbi
->log_blocks_per_seg
= le32_to_cpu(raw_super
->log_blocks_per_seg
);
778 sbi
->blocks_per_seg
= 1 << sbi
->log_blocks_per_seg
;
779 sbi
->segs_per_sec
= le32_to_cpu(raw_super
->segs_per_sec
);
780 sbi
->secs_per_zone
= le32_to_cpu(raw_super
->secs_per_zone
);
781 sbi
->total_sections
= le32_to_cpu(raw_super
->section_count
);
782 sbi
->total_node_count
=
783 (le32_to_cpu(raw_super
->segment_count_nat
) / 2)
784 * sbi
->blocks_per_seg
* NAT_ENTRY_PER_BLOCK
;
785 sbi
->root_ino_num
= le32_to_cpu(raw_super
->root_ino
);
786 sbi
->node_ino_num
= le32_to_cpu(raw_super
->node_ino
);
787 sbi
->meta_ino_num
= le32_to_cpu(raw_super
->meta_ino
);
788 sbi
->cur_victim_sec
= NULL_SECNO
;
789 sbi
->max_victim_search
= DEF_MAX_VICTIM_SEARCH
;
791 for (i
= 0; i
< NR_COUNT_TYPE
; i
++)
792 atomic_set(&sbi
->nr_pages
[i
], 0);
794 sbi
->dir_level
= DEF_DIR_LEVEL
;
798 * Read f2fs raw super block.
799 * Because we have two copies of super block, so read the first one at first,
800 * if the first one is invalid, move to read the second one.
802 static int read_raw_super_block(struct super_block
*sb
,
803 struct f2fs_super_block
**raw_super
,
804 struct buffer_head
**raw_super_buf
)
809 *raw_super_buf
= sb_bread(sb
, block
);
810 if (!*raw_super_buf
) {
811 f2fs_msg(sb
, KERN_ERR
, "Unable to read %dth superblock",
821 *raw_super
= (struct f2fs_super_block
*)
822 ((char *)(*raw_super_buf
)->b_data
+ F2FS_SUPER_OFFSET
);
824 /* sanity checking of raw super */
825 if (sanity_check_raw_super(sb
, *raw_super
)) {
826 brelse(*raw_super_buf
);
827 f2fs_msg(sb
, KERN_ERR
,
828 "Can't find valid F2FS filesystem in %dth superblock",
841 static int f2fs_fill_super(struct super_block
*sb
, void *data
, int silent
)
843 struct f2fs_sb_info
*sbi
;
844 struct f2fs_super_block
*raw_super
;
845 struct buffer_head
*raw_super_buf
;
850 /* allocate memory for f2fs-specific super block info */
851 sbi
= kzalloc(sizeof(struct f2fs_sb_info
), GFP_KERNEL
);
855 /* set a block size */
856 if (unlikely(!sb_set_blocksize(sb
, F2FS_BLKSIZE
))) {
857 f2fs_msg(sb
, KERN_ERR
, "unable to set blocksize");
861 err
= read_raw_super_block(sb
, &raw_super
, &raw_super_buf
);
866 /* init some FS parameters */
867 sbi
->active_logs
= NR_CURSEG_TYPE
;
871 #ifdef CONFIG_F2FS_FS_XATTR
872 set_opt(sbi
, XATTR_USER
);
874 #ifdef CONFIG_F2FS_FS_POSIX_ACL
875 set_opt(sbi
, POSIX_ACL
);
877 /* parse mount options */
878 err
= parse_options(sb
, (char *)data
);
882 sb
->s_maxbytes
= max_file_size(le32_to_cpu(raw_super
->log_blocksize
));
883 sb
->s_max_links
= F2FS_LINK_MAX
;
884 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
886 sb
->s_op
= &f2fs_sops
;
887 sb
->s_xattr
= f2fs_xattr_handlers
;
888 sb
->s_export_op
= &f2fs_export_ops
;
889 sb
->s_magic
= F2FS_SUPER_MAGIC
;
891 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
892 (test_opt(sbi
, POSIX_ACL
) ? MS_POSIXACL
: 0);
893 memcpy(sb
->s_uuid
, raw_super
->uuid
, sizeof(raw_super
->uuid
));
895 /* init f2fs-specific super block info */
897 sbi
->raw_super
= raw_super
;
898 sbi
->raw_super_buf
= raw_super_buf
;
899 mutex_init(&sbi
->gc_mutex
);
900 mutex_init(&sbi
->writepages
);
901 mutex_init(&sbi
->cp_mutex
);
902 mutex_init(&sbi
->node_write
);
903 sbi
->por_doing
= false;
904 spin_lock_init(&sbi
->stat_lock
);
906 mutex_init(&sbi
->read_io
.io_mutex
);
907 sbi
->read_io
.sbi
= sbi
;
908 sbi
->read_io
.bio
= NULL
;
909 for (i
= 0; i
< NR_PAGE_TYPE
; i
++) {
910 mutex_init(&sbi
->write_io
[i
].io_mutex
);
911 sbi
->write_io
[i
].sbi
= sbi
;
912 sbi
->write_io
[i
].bio
= NULL
;
915 init_rwsem(&sbi
->cp_rwsem
);
916 init_waitqueue_head(&sbi
->cp_wait
);
919 /* get an inode for meta space */
920 sbi
->meta_inode
= f2fs_iget(sb
, F2FS_META_INO(sbi
));
921 if (IS_ERR(sbi
->meta_inode
)) {
922 f2fs_msg(sb
, KERN_ERR
, "Failed to read F2FS meta data inode");
923 err
= PTR_ERR(sbi
->meta_inode
);
927 err
= get_valid_checkpoint(sbi
);
929 f2fs_msg(sb
, KERN_ERR
, "Failed to get valid F2FS checkpoint");
930 goto free_meta_inode
;
933 /* sanity checking of checkpoint */
935 if (sanity_check_ckpt(sbi
)) {
936 f2fs_msg(sb
, KERN_ERR
, "Invalid F2FS checkpoint");
940 sbi
->total_valid_node_count
=
941 le32_to_cpu(sbi
->ckpt
->valid_node_count
);
942 sbi
->total_valid_inode_count
=
943 le32_to_cpu(sbi
->ckpt
->valid_inode_count
);
944 sbi
->user_block_count
= le64_to_cpu(sbi
->ckpt
->user_block_count
);
945 sbi
->total_valid_block_count
=
946 le64_to_cpu(sbi
->ckpt
->valid_block_count
);
947 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
948 sbi
->alloc_valid_block_count
= 0;
949 INIT_LIST_HEAD(&sbi
->dir_inode_list
);
950 spin_lock_init(&sbi
->dir_inode_lock
);
952 init_orphan_info(sbi
);
954 /* setup f2fs internal modules */
955 err
= build_segment_manager(sbi
);
957 f2fs_msg(sb
, KERN_ERR
,
958 "Failed to initialize F2FS segment manager");
961 err
= build_node_manager(sbi
);
963 f2fs_msg(sb
, KERN_ERR
,
964 "Failed to initialize F2FS node manager");
968 build_gc_manager(sbi
);
970 /* get an inode for node space */
971 sbi
->node_inode
= f2fs_iget(sb
, F2FS_NODE_INO(sbi
));
972 if (IS_ERR(sbi
->node_inode
)) {
973 f2fs_msg(sb
, KERN_ERR
, "Failed to read node inode");
974 err
= PTR_ERR(sbi
->node_inode
);
978 /* if there are nt orphan nodes free them */
979 recover_orphan_inodes(sbi
);
981 /* read root inode and dentry */
982 root
= f2fs_iget(sb
, F2FS_ROOT_INO(sbi
));
984 f2fs_msg(sb
, KERN_ERR
, "Failed to read root inode");
986 goto free_node_inode
;
988 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
990 goto free_root_inode
;
993 sb
->s_root
= d_make_root(root
); /* allocate root dentry */
996 goto free_root_inode
;
999 err
= f2fs_build_stats(sbi
);
1001 goto free_root_inode
;
1004 sbi
->s_proc
= proc_mkdir(sb
->s_id
, f2fs_proc_root
);
1007 proc_create_data("segment_info", S_IRUGO
, sbi
->s_proc
,
1008 &f2fs_seq_segment_info_fops
, sb
);
1010 if (test_opt(sbi
, DISCARD
)) {
1011 struct request_queue
*q
= bdev_get_queue(sb
->s_bdev
);
1012 if (!blk_queue_discard(q
))
1013 f2fs_msg(sb
, KERN_WARNING
,
1014 "mounting with \"discard\" option, but "
1015 "the device does not support discard");
1018 sbi
->s_kobj
.kset
= f2fs_kset
;
1019 init_completion(&sbi
->s_kobj_unregister
);
1020 err
= kobject_init_and_add(&sbi
->s_kobj
, &f2fs_ktype
, NULL
,
1025 /* recover fsynced data */
1026 if (!test_opt(sbi
, DISABLE_ROLL_FORWARD
)) {
1027 err
= recover_fsync_data(sbi
);
1029 f2fs_msg(sb
, KERN_ERR
,
1030 "Cannot recover all fsync data errno=%ld", err
);
1034 * If filesystem is not mounted as read-only then
1035 * do start the gc_thread.
1037 if (!(sb
->s_flags
& MS_RDONLY
)) {
1038 /* After POR, we can run background GC thread.*/
1039 err
= start_gc_thread(sbi
);
1046 kobject_del(&sbi
->s_kobj
);
1049 remove_proc_entry("segment_info", sbi
->s_proc
);
1050 remove_proc_entry(sb
->s_id
, f2fs_proc_root
);
1052 f2fs_destroy_stats(sbi
);
1057 iput(sbi
->node_inode
);
1059 destroy_node_manager(sbi
);
1061 destroy_segment_manager(sbi
);
1065 make_bad_inode(sbi
->meta_inode
);
1066 iput(sbi
->meta_inode
);
1068 brelse(raw_super_buf
);
1074 static struct dentry
*f2fs_mount(struct file_system_type
*fs_type
, int flags
,
1075 const char *dev_name
, void *data
)
1077 return mount_bdev(fs_type
, flags
, dev_name
, data
, f2fs_fill_super
);
1080 static struct file_system_type f2fs_fs_type
= {
1081 .owner
= THIS_MODULE
,
1083 .mount
= f2fs_mount
,
1084 .kill_sb
= kill_block_super
,
1085 .fs_flags
= FS_REQUIRES_DEV
,
1087 MODULE_ALIAS_FS("f2fs");
1089 static int __init
init_inodecache(void)
1091 f2fs_inode_cachep
= f2fs_kmem_cache_create("f2fs_inode_cache",
1092 sizeof(struct f2fs_inode_info
));
1093 if (!f2fs_inode_cachep
)
1098 static void destroy_inodecache(void)
1101 * Make sure all delayed rcu free inodes are flushed before we
1105 kmem_cache_destroy(f2fs_inode_cachep
);
1108 static int __init
init_f2fs_fs(void)
1112 err
= init_inodecache();
1115 err
= create_node_manager_caches();
1117 goto free_inodecache
;
1118 err
= create_segment_manager_caches();
1120 goto free_node_manager_caches
;
1121 err
= create_gc_caches();
1123 goto free_segment_manager_caches
;
1124 err
= create_checkpoint_caches();
1126 goto free_gc_caches
;
1127 f2fs_kset
= kset_create_and_add("f2fs", NULL
, fs_kobj
);
1130 goto free_checkpoint_caches
;
1132 err
= register_filesystem(&f2fs_fs_type
);
1135 f2fs_create_root_stats();
1136 f2fs_proc_root
= proc_mkdir("fs/f2fs", NULL
);
1140 kset_unregister(f2fs_kset
);
1141 free_checkpoint_caches
:
1142 destroy_checkpoint_caches();
1144 destroy_gc_caches();
1145 free_segment_manager_caches
:
1146 destroy_segment_manager_caches();
1147 free_node_manager_caches
:
1148 destroy_node_manager_caches();
1150 destroy_inodecache();
1155 static void __exit
exit_f2fs_fs(void)
1157 remove_proc_entry("fs/f2fs", NULL
);
1158 f2fs_destroy_root_stats();
1159 unregister_filesystem(&f2fs_fs_type
);
1160 destroy_checkpoint_caches();
1161 destroy_gc_caches();
1162 destroy_segment_manager_caches();
1163 destroy_node_manager_caches();
1164 destroy_inodecache();
1165 kset_unregister(f2fs_kset
);
1168 module_init(init_f2fs_fs
)
1169 module_exit(exit_f2fs_fs
)
1171 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1172 MODULE_DESCRIPTION("Flash Friendly File System");
1173 MODULE_LICENSE("GPL");