From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: [PATCH 06/19] f2fs: introduce f2fs_commit_super Date: Fri, 1 May 2015 17:48:33 -0700 Message-ID: <1430527726-68547-6-git-send-email-jaegeuk@kernel.org> References: <1430527726-68547-1-git-send-email-jaegeuk@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Jaegeuk Kim To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Return-path: In-Reply-To: <1430527726-68547-1-git-send-email-jaegeuk@kernel.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net List-Id: linux-fsdevel.vger.kernel.org This patch introduces f2fs_commit_super to write updated superblock. Signed-off-by: Jaegeuk Kim --- 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 ------------------------------------------------------------------------------ One dashboard for servers and applications across Physical-Virtual-Cloud Widest out-of-the-box monitoring support with 50+ applications Performance metrics, stats and reports that give you Actionable Insights Deep dive visibility with transaction tracing using APM Insight. http://ad.doubleclick.net/ddm/clk/290420510;117567292;y