[XFS] make SYNC_DELWRI no longer use xfs_sync
Continue to de-multiplex xfs_sync be replacing all SYNC_DELWRI callers with direct calls functions that do the work. Isolate the data quiesce case to a function in xfs_sync.c. Isolate the FSDATA case with explicit calls to xfs_sync_fsdata(). Version 2: o Push delwri related log forces into xfs_sync_inodes(). SGI-PV: 988140 SGI-Modid: xfs-linux-melb:xfs-kern:32309a Signed-off-by: David Chinner <david@fromorbit.com> Signed-off-by: Lachlan McIlroy <lachlan@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org>
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@ -998,7 +998,6 @@ xfs_fs_put_super(
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int error;
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xfs_syncd_stop(mp);
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xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC);
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xfs_sync_inodes(mp, SYNC_ATTR|SYNC_DELWRI);
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#ifdef HAVE_DMAPI
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@ -1057,7 +1056,7 @@ xfs_fs_write_super(
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struct super_block *sb)
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{
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if (!(sb->s_flags & MS_RDONLY))
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xfs_sync(XFS_M(sb), SYNC_FSDATA);
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xfs_sync_fsdata(XFS_M(sb), 0);
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sb->s_dirt = 0;
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}
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@ -1068,7 +1067,6 @@ xfs_fs_sync_super(
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{
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struct xfs_mount *mp = XFS_M(sb);
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int error;
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int flags;
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/*
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* Treat a sync operation like a freeze. This is to work
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@ -1082,20 +1080,10 @@ xfs_fs_sync_super(
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* dirty the Linux inode until after the transaction I/O
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* completes.
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*/
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if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE)) {
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/*
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* First stage of freeze - no more writers will make progress
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* now we are here, so we flush delwri and delalloc buffers
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* here, then wait for all I/O to complete. Data is frozen at
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* that point. Metadata is not frozen, transactions can still
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* occur here so don't bother flushing the buftarg (i.e
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* SYNC_QUIESCE) because it'll just get dirty again.
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*/
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flags = SYNC_DATA_QUIESCE;
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} else
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flags = SYNC_FSDATA;
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error = xfs_sync(mp, flags);
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if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
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error = xfs_quiesce_data(mp);
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else
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error = xfs_sync_fsdata(mp, 0);
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sb->s_dirt = 0;
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if (unlikely(laptop_mode)) {
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@ -1233,8 +1221,7 @@ xfs_fs_remount(
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/* rw -> ro */
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if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) {
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xfs_filestream_flush(mp);
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xfs_sync(mp, SYNC_DATA_QUIESCE);
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xfs_quiesce_data(mp);
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xfs_attr_quiesce(mp);
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mp->m_flags |= XFS_MOUNT_RDONLY;
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}
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@ -217,12 +217,16 @@ xfs_sync_inodes(
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int error;
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int last_error;
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int i;
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int lflags = XFS_LOG_FORCE;
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if (mp->m_flags & XFS_MOUNT_RDONLY)
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return 0;
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error = 0;
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last_error = 0;
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if (flags & SYNC_WAIT)
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lflags |= XFS_LOG_SYNC;
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for (i = 0; i < mp->m_sb.sb_agcount; i++) {
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if (!mp->m_perag[i].pag_ici_init)
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continue;
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@ -232,6 +236,9 @@ xfs_sync_inodes(
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if (error == EFSCORRUPTED)
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break;
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}
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if (flags & SYNC_DELWRI)
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xfs_log_force(mp, 0, lflags);
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return XFS_ERROR(last_error);
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}
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@ -269,7 +276,7 @@ xfs_commit_dummy_trans(
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return 0;
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}
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STATIC int
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int
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xfs_sync_fsdata(
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struct xfs_mount *mp,
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int flags)
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@ -322,6 +329,39 @@ xfs_sync_fsdata(
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return error;
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}
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/*
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* First stage of freeze - no more writers will make progress now we are here,
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* so we flush delwri and delalloc buffers here, then wait for all I/O to
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* complete. Data is frozen at that point. Metadata is not frozen,
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* transactions can still occur here so don't bother flushing the buftarg (i.e
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* SYNC_QUIESCE) because it'll just get dirty again.
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*/
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int
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xfs_quiesce_data(
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struct xfs_mount *mp)
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{
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int error;
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/* push non-blocking */
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xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_BDFLUSH);
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XFS_QM_DQSYNC(mp, SYNC_BDFLUSH);
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xfs_filestream_flush(mp);
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/* push and block */
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xfs_sync_inodes(mp, SYNC_DELWRI|SYNC_WAIT|SYNC_IOWAIT);
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XFS_QM_DQSYNC(mp, SYNC_WAIT);
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/* write superblock and hoover shutdown errors */
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error = xfs_sync_fsdata(mp, 0);
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/* flush devices */
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XFS_bflush(mp->m_ddev_targp);
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if (mp->m_rtdev_targp)
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XFS_bflush(mp->m_rtdev_targp);
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return error;
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}
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/*
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* xfs_sync flushes any pending I/O to file system vfsp.
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*
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@ -55,6 +55,9 @@ void xfs_syncd_stop(struct xfs_mount *mp);
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int xfs_sync(struct xfs_mount *mp, int flags);
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int xfs_sync_inodes(struct xfs_mount *mp, int flags);
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int xfs_sync_fsdata(struct xfs_mount *mp, int flags);
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int xfs_quiesce_data(struct xfs_mount *mp);
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void xfs_flush_inode(struct xfs_inode *ip);
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void xfs_flush_device(struct xfs_inode *ip);
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@ -75,7 +75,6 @@ xfs_quiesce_fs(
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* logged before we can write the unmount record.
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*/
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do {
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xfs_log_force(mp, 0, XFS_LOG_FORCE|XFS_LOG_SYNC);
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xfs_sync_inodes(mp, SYNC_ATTR|SYNC_WAIT);
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pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1);
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if (!pincount) {
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