From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kara Subject: [PATCH 3/8] quota: Move quota syncing to ->sync_fs method Date: Tue, 3 Jul 2012 16:45:29 +0200 Message-ID: <1341326734-29881-4-git-send-email-jack@suse.cz> References: <1341326734-29881-1-git-send-email-jack@suse.cz> Cc: , LKML , Curt Wohlgemuth , Christoph Hellwig , Jan Kara , "Theodore Ts'o" , Joel Becker , reiserfs-devel@vger.kernel.org To: Al Viro Return-path: In-Reply-To: <1341326734-29881-1-git-send-email-jack@suse.cz> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org Since the moment writes to quota files are using block device page cache and space for quota structures is reserved at the moment they are first accessed we have no reason to sync quota before inode writeback. In fact this order is now only harmful since quota information can easily change during inode writeback (either because conversion of delayed-allocated extents or simply because of allocation of new blocks for simple filesystems not using page_mkwrite). So move syncing of quota information after writeback of inodes into ->sync_fs method. This way we do not have to use ->quota_sync callback which is primarily intended for use by quotactl syscall anyway and we get rid of calling ->sync_fs() twice unnecessarily. We skip quota syncing for OCFS2 since it does proper quota journalling in all cases (unlike ext3, ext4, and reiserfs which also support legacy non-journalled quotas) and thus there are no dirty quota structures. CC: "Theodore Ts'o" CC: Joel Becker CC: reiserfs-devel@vger.kernel.org Acked-by: Steven Whitehouse Acked-by: Dave Kleikamp Reviewed-by: Christoph Hellwig Signed-off-by: Jan Kara --- fs/ext2/super.c | 6 ++++++ fs/ext3/super.c | 5 +++++ fs/ext4/super.c | 5 +++++ fs/gfs2/super.c | 2 ++ fs/jfs/super.c | 5 +++++ fs/reiserfs/super.c | 5 +++++ fs/sync.c | 3 --- 7 files changed, 28 insertions(+), 3 deletions(-) diff --git a/fs/ext2/super.c b/fs/ext2/super.c index b3621cb..5df3d2d 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1184,6 +1184,12 @@ static int ext2_sync_fs(struct super_block *sb, int wait) struct ext2_sb_info *sbi = EXT2_SB(sb); struct ext2_super_block *es = EXT2_SB(sb)->s_es; + /* + * Write quota structures to quota file, sync_blockdev() will write + * them to disk later + */ + dquot_writeback_dquots(sb, -1); + spin_lock(&sbi->s_lock); if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) { ext2_debug("setting valid to 0\n"); diff --git a/fs/ext3/super.c b/fs/ext3/super.c index 8c3a44b..4ac304c 100644 --- a/fs/ext3/super.c +++ b/fs/ext3/super.c @@ -2526,6 +2526,11 @@ static int ext3_sync_fs(struct super_block *sb, int wait) tid_t target; trace_ext3_sync_fs(sb, wait); + /* + * Writeback quota in non-journalled quota case - journalled quota has + * no dirty dquots + */ + dquot_writeback_dquots(sb, -1); if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) { if (wait) log_wait_commit(EXT3_SB(sb)->s_journal, target); diff --git a/fs/ext4/super.c b/fs/ext4/super.c index eb7aa3e..d875940 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -4325,6 +4325,11 @@ static int ext4_sync_fs(struct super_block *sb, int wait) trace_ext4_sync_fs(sb, wait); flush_workqueue(sbi->dio_unwritten_wq); + /* + * Writeback quota in non-journalled quota case - journalled quota has + * no dirty dquots + */ + dquot_writeback_dquots(sb, -1); if (jbd2_journal_start_commit(sbi->s_journal, &target)) { if (wait) jbd2_log_wait_commit(sbi->s_journal, target); diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 313c329..f3d6bbf 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -952,6 +952,8 @@ restart: static int gfs2_sync_fs(struct super_block *sb, int wait) { struct gfs2_sbd *sdp = sb->s_fs_info; + + gfs2_quota_sync(sb, -1); if (wait && sdp) gfs2_log_flush(sdp, NULL); return 0; diff --git a/fs/jfs/super.c b/fs/jfs/super.c index 4a82950..c55c745 100644 --- a/fs/jfs/super.c +++ b/fs/jfs/super.c @@ -601,6 +601,11 @@ static int jfs_sync_fs(struct super_block *sb, int wait) /* log == NULL indicates read-only mount */ if (log) { + /* + * Write quota structures to quota file, sync_blockdev() will + * write them to disk later + */ + dquot_writeback_dquots(sb, -1); jfs_flush_journal(log, wait); jfs_syncpt(log, 0); } diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 651ce76..7a37dab 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -68,6 +68,11 @@ static int reiserfs_sync_fs(struct super_block *s, int wait) { struct reiserfs_transaction_handle th; + /* + * Writeback quota in non-journalled quota case - journalled quota has + * no dirty dquots + */ + dquot_writeback_dquots(s, -1); reiserfs_write_lock(s); if (!journal_begin(&th, s, 1)) if (!journal_end_sync(&th, s, 1)) diff --git a/fs/sync.c b/fs/sync.c index cae145d..66acd2b 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -29,9 +29,6 @@ */ static int __sync_filesystem(struct super_block *sb, int wait) { - if (sb->s_qcop && sb->s_qcop->quota_sync) - sb->s_qcop->quota_sync(sb, -1); - if (wait) sync_inodes_sb(sb); else -- 1.7.1