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,
56 static match_table_t f2fs_tokens = {
57 {Opt_gc_background, "background_gc=%s"},
58 {Opt_disable_roll_forward, "disable_roll_forward"},
59 {Opt_discard, "discard"},
60 {Opt_noheap, "no_heap"},
61 {Opt_user_xattr, "user_xattr"},
62 {Opt_nouser_xattr, "nouser_xattr"},
65 {Opt_active_logs, "active_logs=%u"},
66 {Opt_disable_ext_identify, "disable_ext_identify"},
67 {Opt_inline_xattr, "inline_xattr"},
71 /* Sysfs support for f2fs */
73 struct attribute attr;
74 ssize_t (*show)(struct f2fs_attr *, struct f2fs_sb_info *, char *);
75 ssize_t (*store)(struct f2fs_attr *, struct f2fs_sb_info *,
76 const char *, size_t);
80 static ssize_t f2fs_sbi_show(struct f2fs_attr *a,
81 struct f2fs_sb_info *sbi, char *buf)
83 struct f2fs_gc_kthread *gc_kth = sbi->gc_thread;
89 ui = (unsigned int *)(((char *)gc_kth) + a->offset);
91 return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
94 static ssize_t f2fs_sbi_store(struct f2fs_attr *a,
95 struct f2fs_sb_info *sbi,
96 const char *buf, size_t count)
98 struct f2fs_gc_kthread *gc_kth = sbi->gc_thread;
106 ui = (unsigned int *)(((char *)gc_kth) + a->offset);
108 ret = kstrtoul(skip_spaces(buf), 0, &t);
115 static ssize_t f2fs_attr_show(struct kobject *kobj,
116 struct attribute *attr, char *buf)
118 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
120 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
122 return a->show ? a->show(a, sbi, buf) : 0;
125 static ssize_t f2fs_attr_store(struct kobject *kobj, struct attribute *attr,
126 const char *buf, size_t len)
128 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
130 struct f2fs_attr *a = container_of(attr, struct f2fs_attr, attr);
132 return a->store ? a->store(a, sbi, buf, len) : 0;
135 static void f2fs_sb_release(struct kobject *kobj)
137 struct f2fs_sb_info *sbi = container_of(kobj, struct f2fs_sb_info,
139 complete(&sbi->s_kobj_unregister);
142 #define F2FS_ATTR_OFFSET(_name, _mode, _show, _store, _elname) \
143 static struct f2fs_attr f2fs_attr_##_name = { \
144 .attr = {.name = __stringify(_name), .mode = _mode }, \
147 .offset = offsetof(struct f2fs_gc_kthread, _elname), \
150 #define F2FS_RW_ATTR(name, elname) \
151 F2FS_ATTR_OFFSET(name, 0644, f2fs_sbi_show, f2fs_sbi_store, elname)
153 F2FS_RW_ATTR(gc_min_sleep_time, min_sleep_time);
154 F2FS_RW_ATTR(gc_max_sleep_time, max_sleep_time);
155 F2FS_RW_ATTR(gc_no_gc_sleep_time, no_gc_sleep_time);
156 F2FS_RW_ATTR(gc_idle, gc_idle);
158 #define ATTR_LIST(name) (&f2fs_attr_##name.attr)
159 static struct attribute *f2fs_attrs[] = {
160 ATTR_LIST(gc_min_sleep_time),
161 ATTR_LIST(gc_max_sleep_time),
162 ATTR_LIST(gc_no_gc_sleep_time),
167 static const struct sysfs_ops f2fs_attr_ops = {
168 .show = f2fs_attr_show,
169 .store = f2fs_attr_store,
172 static struct kobj_type f2fs_ktype = {
173 .default_attrs = f2fs_attrs,
174 .sysfs_ops = &f2fs_attr_ops,
175 .release = f2fs_sb_release,
178 void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
180 struct va_format vaf;
186 printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
190 static void init_once(void *foo)
192 struct f2fs_inode_info *fi = (struct f2fs_inode_info *) foo;
194 inode_init_once(&fi->vfs_inode);
197 static int parse_options(struct super_block *sb, char *options)
199 struct f2fs_sb_info *sbi = F2FS_SB(sb);
200 substring_t args[MAX_OPT_ARGS];
207 while ((p = strsep(&options, ",")) != NULL) {
212 * Initialize args struct so we know whether arg was
213 * found; some options take optional arguments.
215 args[0].to = args[0].from = NULL;
216 token = match_token(p, f2fs_tokens, args);
219 case Opt_gc_background:
220 name = match_strdup(&args[0]);
224 if (!strncmp(name, "on", 2))
226 else if (!strncmp(name, "off", 3))
227 clear_opt(sbi, BG_GC);
234 case Opt_disable_roll_forward:
235 set_opt(sbi, DISABLE_ROLL_FORWARD);
238 set_opt(sbi, DISCARD);
241 set_opt(sbi, NOHEAP);
243 #ifdef CONFIG_F2FS_FS_XATTR
245 set_opt(sbi, XATTR_USER);
247 case Opt_nouser_xattr:
248 clear_opt(sbi, XATTR_USER);
250 case Opt_inline_xattr:
251 set_opt(sbi, INLINE_XATTR);
255 f2fs_msg(sb, KERN_INFO,
256 "user_xattr options not supported");
258 case Opt_nouser_xattr:
259 f2fs_msg(sb, KERN_INFO,
260 "nouser_xattr options not supported");
262 case Opt_inline_xattr:
263 f2fs_msg(sb, KERN_INFO,
264 "inline_xattr options not supported");
267 #ifdef CONFIG_F2FS_FS_POSIX_ACL
269 set_opt(sbi, POSIX_ACL);
272 clear_opt(sbi, POSIX_ACL);
276 f2fs_msg(sb, KERN_INFO, "acl options not supported");
279 f2fs_msg(sb, KERN_INFO, "noacl options not supported");
282 case Opt_active_logs:
283 if (args->from && match_int(args, &arg))
285 if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
287 sbi->active_logs = arg;
289 case Opt_disable_ext_identify:
290 set_opt(sbi, DISABLE_EXT_IDENTIFY);
293 f2fs_msg(sb, KERN_ERR,
294 "Unrecognized mount option \"%s\" or missing value",
302 static struct inode *f2fs_alloc_inode(struct super_block *sb)
304 struct f2fs_inode_info *fi;
306 fi = kmem_cache_alloc(f2fs_inode_cachep, GFP_NOFS | __GFP_ZERO);
310 init_once((void *) fi);
312 /* Initialize f2fs-specific inode info */
313 fi->vfs_inode.i_version = 1;
314 atomic_set(&fi->dirty_dents, 0);
315 fi->i_current_depth = 1;
317 rwlock_init(&fi->ext.ext_lock);
319 set_inode_flag(fi, FI_NEW_INODE);
321 if (test_opt(F2FS_SB(sb), INLINE_XATTR))
322 set_inode_flag(fi, FI_INLINE_XATTR);
324 return &fi->vfs_inode;
327 static int f2fs_drop_inode(struct inode *inode)
330 * This is to avoid a deadlock condition like below.
331 * writeback_single_inode(inode)
332 * - f2fs_write_data_page
333 * - f2fs_gc -> iput -> evict
334 * - inode_wait_for_writeback(inode)
336 if (!inode_unhashed(inode) && inode->i_state & I_SYNC)
338 return generic_drop_inode(inode);
342 * f2fs_dirty_inode() is called from __mark_inode_dirty()
344 * We should call set_dirty_inode to write the dirty inode through write_inode.
346 static void f2fs_dirty_inode(struct inode *inode, int flags)
348 set_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
351 static void f2fs_i_callback(struct rcu_head *head)
353 struct inode *inode = container_of(head, struct inode, i_rcu);
354 kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
357 static void f2fs_destroy_inode(struct inode *inode)
359 call_rcu(&inode->i_rcu, f2fs_i_callback);
362 static void f2fs_put_super(struct super_block *sb)
364 struct f2fs_sb_info *sbi = F2FS_SB(sb);
367 remove_proc_entry("segment_info", sbi->s_proc);
368 remove_proc_entry(sb->s_id, f2fs_proc_root);
370 kobject_del(&sbi->s_kobj);
372 f2fs_destroy_stats(sbi);
375 /* We don't need to do checkpoint when it's clean */
376 if (sbi->s_dirty && get_pages(sbi, F2FS_DIRTY_NODES))
377 write_checkpoint(sbi, true);
379 iput(sbi->node_inode);
380 iput(sbi->meta_inode);
382 /* destroy f2fs internal modules */
383 destroy_node_manager(sbi);
384 destroy_segment_manager(sbi);
387 kobject_put(&sbi->s_kobj);
388 wait_for_completion(&sbi->s_kobj_unregister);
390 sb->s_fs_info = NULL;
391 brelse(sbi->raw_super_buf);
395 int f2fs_sync_fs(struct super_block *sb, int sync)
397 struct f2fs_sb_info *sbi = F2FS_SB(sb);
399 trace_f2fs_sync_fs(sb, sync);
401 if (!sbi->s_dirty && !get_pages(sbi, F2FS_DIRTY_NODES))
405 mutex_lock(&sbi->gc_mutex);
406 write_checkpoint(sbi, false);
407 mutex_unlock(&sbi->gc_mutex);
409 f2fs_balance_fs(sbi);
415 static int f2fs_freeze(struct super_block *sb)
419 if (f2fs_readonly(sb))
422 err = f2fs_sync_fs(sb, 1);
426 static int f2fs_unfreeze(struct super_block *sb)
431 static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
433 struct super_block *sb = dentry->d_sb;
434 struct f2fs_sb_info *sbi = F2FS_SB(sb);
435 u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
436 block_t total_count, user_block_count, start_count, ovp_count;
438 total_count = le64_to_cpu(sbi->raw_super->block_count);
439 user_block_count = sbi->user_block_count;
440 start_count = le32_to_cpu(sbi->raw_super->segment0_blkaddr);
441 ovp_count = SM_I(sbi)->ovp_segments << sbi->log_blocks_per_seg;
442 buf->f_type = F2FS_SUPER_MAGIC;
443 buf->f_bsize = sbi->blocksize;
445 buf->f_blocks = total_count - start_count;
446 buf->f_bfree = buf->f_blocks - valid_user_blocks(sbi) - ovp_count;
447 buf->f_bavail = user_block_count - valid_user_blocks(sbi);
449 buf->f_files = sbi->total_node_count;
450 buf->f_ffree = sbi->total_node_count - valid_inode_count(sbi);
452 buf->f_namelen = F2FS_NAME_LEN;
453 buf->f_fsid.val[0] = (u32)id;
454 buf->f_fsid.val[1] = (u32)(id >> 32);
459 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
461 struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
463 if (!(root->d_sb->s_flags & MS_RDONLY) && test_opt(sbi, BG_GC))
464 seq_printf(seq, ",background_gc=%s", "on");
466 seq_printf(seq, ",background_gc=%s", "off");
467 if (test_opt(sbi, DISABLE_ROLL_FORWARD))
468 seq_puts(seq, ",disable_roll_forward");
469 if (test_opt(sbi, DISCARD))
470 seq_puts(seq, ",discard");
471 if (test_opt(sbi, NOHEAP))
472 seq_puts(seq, ",no_heap_alloc");
473 #ifdef CONFIG_F2FS_FS_XATTR
474 if (test_opt(sbi, XATTR_USER))
475 seq_puts(seq, ",user_xattr");
477 seq_puts(seq, ",nouser_xattr");
478 if (test_opt(sbi, INLINE_XATTR))
479 seq_puts(seq, ",inline_xattr");
481 #ifdef CONFIG_F2FS_FS_POSIX_ACL
482 if (test_opt(sbi, POSIX_ACL))
483 seq_puts(seq, ",acl");
485 seq_puts(seq, ",noacl");
487 if (test_opt(sbi, DISABLE_EXT_IDENTIFY))
488 seq_puts(seq, ",disable_ext_identify");
490 seq_printf(seq, ",active_logs=%u", sbi->active_logs);
495 static int segment_info_seq_show(struct seq_file *seq, void *offset)
497 struct super_block *sb = seq->private;
498 struct f2fs_sb_info *sbi = F2FS_SB(sb);
499 unsigned int total_segs = le32_to_cpu(sbi->raw_super->segment_count_main);
502 for (i = 0; i < total_segs; i++) {
503 seq_printf(seq, "%u", get_valid_blocks(sbi, i, 1));
504 if (i != 0 && (i % 10) == 0)
512 static int segment_info_open_fs(struct inode *inode, struct file *file)
514 return single_open(file, segment_info_seq_show, PDE_DATA(inode));
517 static const struct file_operations f2fs_seq_segment_info_fops = {
518 .owner = THIS_MODULE,
519 .open = segment_info_open_fs,
522 .release = single_release,
525 static int f2fs_remount(struct super_block *sb, int *flags, char *data)
527 struct f2fs_sb_info *sbi = F2FS_SB(sb);
528 struct f2fs_mount_info org_mount_opt;
529 int err, active_logs;
532 * Save the old mount options in case we
533 * need to restore them.
535 org_mount_opt = sbi->mount_opt;
536 active_logs = sbi->active_logs;
538 /* parse mount options */
539 err = parse_options(sb, data);
544 * Previous and new state of filesystem is RO,
545 * so no point in checking GC conditions.
547 if ((sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
551 * We stop the GC thread if FS is mounted as RO
552 * or if background_gc = off is passed in mount
553 * option. Also sync the filesystem.
555 if ((*flags & MS_RDONLY) || !test_opt(sbi, BG_GC)) {
556 if (sbi->gc_thread) {
560 } else if (test_opt(sbi, BG_GC) && !sbi->gc_thread) {
561 err = start_gc_thread(sbi);
566 /* Update the POSIXACL Flag */
567 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
568 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
572 sbi->mount_opt = org_mount_opt;
573 sbi->active_logs = active_logs;
577 static struct super_operations f2fs_sops = {
578 .alloc_inode = f2fs_alloc_inode,
579 .drop_inode = f2fs_drop_inode,
580 .destroy_inode = f2fs_destroy_inode,
581 .write_inode = f2fs_write_inode,
582 .dirty_inode = f2fs_dirty_inode,
583 .show_options = f2fs_show_options,
584 .evict_inode = f2fs_evict_inode,
585 .put_super = f2fs_put_super,
586 .sync_fs = f2fs_sync_fs,
587 .freeze_fs = f2fs_freeze,
588 .unfreeze_fs = f2fs_unfreeze,
589 .statfs = f2fs_statfs,
590 .remount_fs = f2fs_remount,
593 static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
594 u64 ino, u32 generation)
596 struct f2fs_sb_info *sbi = F2FS_SB(sb);
599 if (ino < F2FS_ROOT_INO(sbi))
600 return ERR_PTR(-ESTALE);
603 * f2fs_iget isn't quite right if the inode is currently unallocated!
604 * However f2fs_iget currently does appropriate checks to handle stale
605 * inodes so everything is OK.
607 inode = f2fs_iget(sb, ino);
609 return ERR_CAST(inode);
610 if (generation && inode->i_generation != generation) {
611 /* we didn't find the right inode.. */
613 return ERR_PTR(-ESTALE);
618 static struct dentry *f2fs_fh_to_dentry(struct super_block *sb, struct fid *fid,
619 int fh_len, int fh_type)
621 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
625 static struct dentry *f2fs_fh_to_parent(struct super_block *sb, struct fid *fid,
626 int fh_len, int fh_type)
628 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
632 static const struct export_operations f2fs_export_ops = {
633 .fh_to_dentry = f2fs_fh_to_dentry,
634 .fh_to_parent = f2fs_fh_to_parent,
635 .get_parent = f2fs_get_parent,
638 static loff_t max_file_size(unsigned bits)
640 loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
641 loff_t leaf_count = ADDRS_PER_BLOCK;
643 /* two direct node blocks */
644 result += (leaf_count * 2);
646 /* two indirect node blocks */
647 leaf_count *= NIDS_PER_BLOCK;
648 result += (leaf_count * 2);
650 /* one double indirect node block */
651 leaf_count *= NIDS_PER_BLOCK;
652 result += leaf_count;
658 static int sanity_check_raw_super(struct super_block *sb,
659 struct f2fs_super_block *raw_super)
661 unsigned int blocksize;
663 if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
664 f2fs_msg(sb, KERN_INFO,
665 "Magic Mismatch, valid(0x%x) - read(0x%x)",
666 F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
670 /* Currently, support only 4KB page cache size */
671 if (F2FS_BLKSIZE != PAGE_CACHE_SIZE) {
672 f2fs_msg(sb, KERN_INFO,
673 "Invalid page_cache_size (%lu), supports only 4KB\n",
678 /* Currently, support only 4KB block size */
679 blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
680 if (blocksize != F2FS_BLKSIZE) {
681 f2fs_msg(sb, KERN_INFO,
682 "Invalid blocksize (%u), supports only 4KB\n",
687 if (le32_to_cpu(raw_super->log_sectorsize) !=
688 F2FS_LOG_SECTOR_SIZE) {
689 f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize");
692 if (le32_to_cpu(raw_super->log_sectors_per_block) !=
693 F2FS_LOG_SECTORS_PER_BLOCK) {
694 f2fs_msg(sb, KERN_INFO, "Invalid log sectors per block");
700 static int sanity_check_ckpt(struct f2fs_sb_info *sbi)
702 unsigned int total, fsmeta;
703 struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
704 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
706 total = le32_to_cpu(raw_super->segment_count);
707 fsmeta = le32_to_cpu(raw_super->segment_count_ckpt);
708 fsmeta += le32_to_cpu(raw_super->segment_count_sit);
709 fsmeta += le32_to_cpu(raw_super->segment_count_nat);
710 fsmeta += le32_to_cpu(ckpt->rsvd_segment_count);
711 fsmeta += le32_to_cpu(raw_super->segment_count_ssa);
716 if (is_set_ckpt_flags(ckpt, CP_ERROR_FLAG)) {
717 f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
723 static void init_sb_info(struct f2fs_sb_info *sbi)
725 struct f2fs_super_block *raw_super = sbi->raw_super;
728 sbi->log_sectors_per_block =
729 le32_to_cpu(raw_super->log_sectors_per_block);
730 sbi->log_blocksize = le32_to_cpu(raw_super->log_blocksize);
731 sbi->blocksize = 1 << sbi->log_blocksize;
732 sbi->log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
733 sbi->blocks_per_seg = 1 << sbi->log_blocks_per_seg;
734 sbi->segs_per_sec = le32_to_cpu(raw_super->segs_per_sec);
735 sbi->secs_per_zone = le32_to_cpu(raw_super->secs_per_zone);
736 sbi->total_sections = le32_to_cpu(raw_super->section_count);
737 sbi->total_node_count =
738 (le32_to_cpu(raw_super->segment_count_nat) / 2)
739 * sbi->blocks_per_seg * NAT_ENTRY_PER_BLOCK;
740 sbi->root_ino_num = le32_to_cpu(raw_super->root_ino);
741 sbi->node_ino_num = le32_to_cpu(raw_super->node_ino);
742 sbi->meta_ino_num = le32_to_cpu(raw_super->meta_ino);
743 sbi->cur_victim_sec = NULL_SECNO;
745 for (i = 0; i < NR_COUNT_TYPE; i++)
746 atomic_set(&sbi->nr_pages[i], 0);
750 * Read f2fs raw super block.
751 * Because we have two copies of super block, so read the first one at first,
752 * if the first one is invalid, move to read the second one.
754 static int read_raw_super_block(struct super_block *sb,
755 struct f2fs_super_block **raw_super,
756 struct buffer_head **raw_super_buf)
761 *raw_super_buf = sb_bread(sb, block);
762 if (!*raw_super_buf) {
763 f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
773 *raw_super = (struct f2fs_super_block *)
774 ((char *)(*raw_super_buf)->b_data + F2FS_SUPER_OFFSET);
776 /* sanity checking of raw super */
777 if (sanity_check_raw_super(sb, *raw_super)) {
778 brelse(*raw_super_buf);
779 f2fs_msg(sb, KERN_ERR, "Can't find a valid F2FS filesystem "
780 "in %dth superblock", block + 1);
792 static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
794 struct f2fs_sb_info *sbi;
795 struct f2fs_super_block *raw_super;
796 struct buffer_head *raw_super_buf;
800 /* allocate memory for f2fs-specific super block info */
801 sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
805 /* set a block size */
806 if (!sb_set_blocksize(sb, F2FS_BLKSIZE)) {
807 f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
811 err = read_raw_super_block(sb, &raw_super, &raw_super_buf);
816 /* init some FS parameters */
817 sbi->active_logs = NR_CURSEG_TYPE;
821 #ifdef CONFIG_F2FS_FS_XATTR
822 set_opt(sbi, XATTR_USER);
824 #ifdef CONFIG_F2FS_FS_POSIX_ACL
825 set_opt(sbi, POSIX_ACL);
827 /* parse mount options */
828 err = parse_options(sb, (char *)data);
832 sb->s_maxbytes = max_file_size(le32_to_cpu(raw_super->log_blocksize));
833 sb->s_max_links = F2FS_LINK_MAX;
834 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
836 sb->s_op = &f2fs_sops;
837 sb->s_xattr = f2fs_xattr_handlers;
838 sb->s_export_op = &f2fs_export_ops;
839 sb->s_magic = F2FS_SUPER_MAGIC;
841 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
842 (test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
843 memcpy(sb->s_uuid, raw_super->uuid, sizeof(raw_super->uuid));
845 /* init f2fs-specific super block info */
847 sbi->raw_super = raw_super;
848 sbi->raw_super_buf = raw_super_buf;
849 mutex_init(&sbi->gc_mutex);
850 mutex_init(&sbi->writepages);
851 mutex_init(&sbi->cp_mutex);
852 mutex_init(&sbi->node_write);
853 sbi->por_doing = false;
854 spin_lock_init(&sbi->stat_lock);
855 init_rwsem(&sbi->bio_sem);
856 init_rwsem(&sbi->cp_rwsem);
859 /* get an inode for meta space */
860 sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
861 if (IS_ERR(sbi->meta_inode)) {
862 f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
863 err = PTR_ERR(sbi->meta_inode);
867 err = get_valid_checkpoint(sbi);
869 f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
870 goto free_meta_inode;
873 /* sanity checking of checkpoint */
875 if (sanity_check_ckpt(sbi)) {
876 f2fs_msg(sb, KERN_ERR, "Invalid F2FS checkpoint");
880 sbi->total_valid_node_count =
881 le32_to_cpu(sbi->ckpt->valid_node_count);
882 sbi->total_valid_inode_count =
883 le32_to_cpu(sbi->ckpt->valid_inode_count);
884 sbi->user_block_count = le64_to_cpu(sbi->ckpt->user_block_count);
885 sbi->total_valid_block_count =
886 le64_to_cpu(sbi->ckpt->valid_block_count);
887 sbi->last_valid_block_count = sbi->total_valid_block_count;
888 sbi->alloc_valid_block_count = 0;
889 INIT_LIST_HEAD(&sbi->dir_inode_list);
890 spin_lock_init(&sbi->dir_inode_lock);
892 init_orphan_info(sbi);
894 /* setup f2fs internal modules */
895 err = build_segment_manager(sbi);
897 f2fs_msg(sb, KERN_ERR,
898 "Failed to initialize F2FS segment manager");
901 err = build_node_manager(sbi);
903 f2fs_msg(sb, KERN_ERR,
904 "Failed to initialize F2FS node manager");
908 build_gc_manager(sbi);
910 /* get an inode for node space */
911 sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
912 if (IS_ERR(sbi->node_inode)) {
913 f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
914 err = PTR_ERR(sbi->node_inode);
918 /* if there are nt orphan nodes free them */
920 if (recover_orphan_inodes(sbi))
921 goto free_node_inode;
923 /* read root inode and dentry */
924 root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
926 f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
928 goto free_node_inode;
930 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size)
931 goto free_root_inode;
933 sb->s_root = d_make_root(root); /* allocate root dentry */
936 goto free_root_inode;
939 /* recover fsynced data */
940 if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
941 err = recover_fsync_data(sbi);
943 f2fs_msg(sb, KERN_ERR,
944 "Cannot recover all fsync data errno=%ld", err);
948 * If filesystem is not mounted as read-only then
949 * do start the gc_thread.
951 if (!(sb->s_flags & MS_RDONLY)) {
952 /* After POR, we can run background GC thread.*/
953 err = start_gc_thread(sbi);
958 err = f2fs_build_stats(sbi);
963 sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
966 proc_create_data("segment_info", S_IRUGO, sbi->s_proc,
967 &f2fs_seq_segment_info_fops, sb);
969 if (test_opt(sbi, DISCARD)) {
970 struct request_queue *q = bdev_get_queue(sb->s_bdev);
971 if (!blk_queue_discard(q))
972 f2fs_msg(sb, KERN_WARNING,
973 "mounting with \"discard\" option, but "
974 "the device does not support discard");
977 sbi->s_kobj.kset = f2fs_kset;
978 init_completion(&sbi->s_kobj_unregister);
979 err = kobject_init_and_add(&sbi->s_kobj, &f2fs_ktype, NULL,
991 iput(sbi->node_inode);
993 destroy_node_manager(sbi);
995 destroy_segment_manager(sbi);
999 make_bad_inode(sbi->meta_inode);
1000 iput(sbi->meta_inode);
1002 brelse(raw_super_buf);
1008 static struct dentry *f2fs_mount(struct file_system_type *fs_type, int flags,
1009 const char *dev_name, void *data)
1011 return mount_bdev(fs_type, flags, dev_name, data, f2fs_fill_super);
1014 static struct file_system_type f2fs_fs_type = {
1015 .owner = THIS_MODULE,
1017 .mount = f2fs_mount,
1018 .kill_sb = kill_block_super,
1019 .fs_flags = FS_REQUIRES_DEV,
1021 MODULE_ALIAS_FS("f2fs");
1023 static int __init init_inodecache(void)
1025 f2fs_inode_cachep = f2fs_kmem_cache_create("f2fs_inode_cache",
1026 sizeof(struct f2fs_inode_info), NULL);
1027 if (f2fs_inode_cachep == NULL)
1032 static void destroy_inodecache(void)
1035 * Make sure all delayed rcu free inodes are flushed before we
1039 kmem_cache_destroy(f2fs_inode_cachep);
1042 static int __init init_f2fs_fs(void)
1046 err = init_inodecache();
1049 err = create_node_manager_caches();
1051 goto free_inodecache;
1052 err = create_gc_caches();
1054 goto free_node_manager_caches;
1055 err = create_checkpoint_caches();
1057 goto free_gc_caches;
1058 f2fs_kset = kset_create_and_add("f2fs", NULL, fs_kobj);
1061 goto free_checkpoint_caches;
1063 err = register_filesystem(&f2fs_fs_type);
1066 f2fs_create_root_stats();
1067 f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
1071 kset_unregister(f2fs_kset);
1072 free_checkpoint_caches:
1073 destroy_checkpoint_caches();
1075 destroy_gc_caches();
1076 free_node_manager_caches:
1077 destroy_node_manager_caches();
1079 destroy_inodecache();
1084 static void __exit exit_f2fs_fs(void)
1086 remove_proc_entry("fs/f2fs", NULL);
1087 f2fs_destroy_root_stats();
1088 unregister_filesystem(&f2fs_fs_type);
1089 destroy_checkpoint_caches();
1090 destroy_gc_caches();
1091 destroy_node_manager_caches();
1092 destroy_inodecache();
1093 kset_unregister(f2fs_kset);
1096 module_init(init_f2fs_fs)
1097 module_exit(exit_f2fs_fs)
1099 MODULE_AUTHOR("Samsung Electronics's Praesto Team");
1100 MODULE_DESCRIPTION("Flash Friendly File System");
1101 MODULE_LICENSE("GPL");