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f2fs: introduce f2fs_commit_super

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This patch introduces f2fs_commit_super to write updated superblock.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-04-20 18:49:51 -07:00
parent 003a3e1d60
commit 26d815ad75
2 changed files with 25 additions and 0 deletions
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1
fs/f2fs/f2fs.h
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@ -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 *, ...);

24
fs/f2fs/super.c
View file

@ -966,6 +966,30 @@ static int read_raw_super_block(struct super_block *sb,
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;