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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-04-21 04:49:51 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-05-29 01:41:29 +0300 |
| commit | 26d815ad75156a1cf2f6c7ba94cdfd32849879d7 (patch) | |
| tree | 88a639a11bd7eaf2b65863245254d8fc139aeca8 /fs/f2fs | |
| parent | 003a3e1d60b0bb5cfb4feffb05a2083db2346364 (diff) | |
| download | linux-26d815ad75156a1cf2f6c7ba94cdfd32849879d7.tar.xz | |
f2fs: introduce f2fs_commit_super
This patch introduces f2fs_commit_super to write updated superblock.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 24 |
2 files changed, 25 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index c98454d011ff..7ff3ac7a1ce8 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1535,6 +1535,7 @@ static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode) /* * super.c */ +int f2fs_commit_super(struct f2fs_sb_info *); int f2fs_sync_fs(struct super_block *, int); extern __printf(3, 4) void f2fs_msg(struct super_block *, const char *, const char *, ...); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index b2dd1b01f076..85841687b40a 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -966,6 +966,30 @@ retry: return 0; } +int f2fs_commit_super(struct f2fs_sb_info *sbi) +{ + struct buffer_head *sbh = sbi->raw_super_buf; + sector_t block = sbh->b_blocknr; + int err; + + /* write back-up superblock first */ + sbh->b_blocknr = block ? 0 : 1; + mark_buffer_dirty(sbh); + err = sync_dirty_buffer(sbh); + + sbh->b_blocknr = block; + if (err) + goto out; + + /* write current valid superblock */ + mark_buffer_dirty(sbh); + err = sync_dirty_buffer(sbh); +out: + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + return err; +} + static int f2fs_fill_super(struct super_block *sb, void *data, int silent) { struct f2fs_sb_info *sbi; |