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Commit 26d815ad authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: introduce f2fs_commit_super 



This patch introduces f2fs_commit_super to write updated superblock.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 003a3e1d

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -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 *, ...);

fs/f2fs/super.c

+24 −0
Original line number Diff line number Diff line
@@ -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;