This patch introduces f2fs_commit_super to write updated superblock.
Signed-off-by: Jaegeuk Kim <[email protected]>
---
fs/f2fs/f2fs.h | 1 +
fs/f2fs/super.c | 24 ++++++++++++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index c98454d..7ff3ac7 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 b2dd1b0..8584168 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;
--
2.1.1
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