[PATCH 08/10] XFS: Kill SYNC_CLOSE

Dave Chinner
2008-09-13T13:56:12Z

SYNC_CLOSE is only ever used and checked in conjunction with
SYNC_WAIT, and this only done in one spot. The only thing
this does is make XFS_bflush() calls to the data buftargs.

This will happen very shortly afterwards the xfs_sync() call
anyway in the unmount path via the xfs_close_devices(), so this
code is redundant and can be removed. That only user of SYNC_CLOSE
is now gone, so kill the flag completely.

Signed-off-by: Dave Chinner <david@fromorbit.com>
---
fs/xfs/linux-2.6/xfs_super.c | 10 ----------
fs/xfs/linux-2.6/xfs_sync.c | 31 ++-----------------------------
fs/xfs/linux-2.6/xfs_sync.h | 1 -
3 files changed, 2 insertions(+), 40 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 4dbe279..b7e64f5 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -991,16 +991,6 @@ xfs_fs_put_super(
error = xfs_unmount_flush(mp, 0);
WARN_ON(error);

- /*
- * If we're forcing a shutdown, typically because of a media error,
- * we want to make sure we invalidate dirty pages that belong to
- * referenced vnodes as well.
- */
- if (XFS_FORCED_SHUTDOWN(mp)) {
- error = xfs_sync(mp, SYNC_WAIT | SYNC_CLOSE);
- ASSERT(error != EFSCORRUPTED);
- }
-
if (mp->m_flags & XFS_MOUNT_DMAPI) {
XFS_SEND_UNMOUNT(mp, rip, DM_RIGHT_NULL, 0, 0,
unmount_event_flags);
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index 838070c..91a54a7 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -70,7 +70,7 @@ xfs_sync_inodes_ag(
if (flags & SYNC_WAIT)
fflag = 0; /* synchronous overrides all */

- if (flags & (SYNC_DELWRI | SYNC_CLOSE)) {
+ if (flags & SYNC_DELWRI) {
/*
* We need the I/O lock if we're going to call any of
* the flush/inval routines.
@@ -117,7 +117,7 @@ xfs_sync_inodes_ag(
}

/* nothing to sync during shutdown */
- if (XFS_FORCED_SHUTDOWN(mp) && !(flags & SYNC_CLOSE)) {
+ if (XFS_FORCED_SHUTDOWN(mp)) {
read_unlock(&pag->pag_ici_lock);
return 0;
}
@@ -152,20 +152,6 @@ xfs_sync_inodes_ag(
* If we need to drop the lock, insert a marker if we
* have not already done so.
*/
- if (flags & SYNC_CLOSE) {
- xfs_iunlock(ip, XFS_ILOCK_SHARED);
- if (XFS_FORCED_SHUTDOWN(mp))
- xfs_tosspages(ip, 0, -1, FI_REMAPF);
- else
- error = xfs_flushinval_pages(ip, 0, -1,
- FI_REMAPF);
- /* wait for I/O on freeze */
- if (flags & SYNC_IOWAIT)
- vn_iowait(ip);
-
- xfs_ilock(ip, XFS_ILOCK_SHARED);
- }
-
if ((flags & SYNC_DELWRI) && VN_DIRTY(inode)) {
xfs_iunlock(ip, XFS_ILOCK_SHARED);
error = xfs_flush_pages(ip, 0, -1, fflag, FI_NONE);
@@ -390,8 +376,6 @@ xfs_quiesce_data(
* inodes. SYNC_WAIT and SYNC_BDFLUSH are used to
* determine if they should be flushed sync, async, or
* delwri.
- * SYNC_CLOSE - This flag is passed when the system is being
- * unmounted. We should sync and invalidate everything.
* SYNC_FSDATA - This indicates that the caller would like to make
* sure the superblock is safe on disk. We can ensure
* this by simply making sure the log gets flushed
@@ -472,17 +456,6 @@ xfs_sync(
return error;
}

- /*
- * When shutting down, we need to insure that the AIL is pushed
- * to disk or the filesystem can appear corrupt from the PROM.
- */
- if ((flags & (SYNC_CLOSE|SYNC_WAIT)) == (SYNC_CLOSE|SYNC_WAIT)) {
- XFS_bflush(mp->m_ddev_targp);
- if (mp->m_rtdev_targp) {
- XFS_bflush(mp->m_rtdev_targp);
- }
- }
-
return XFS_ERROR(last_error);
}

diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h
index fcd4040..2509db0 100644
--- a/fs/xfs/linux-2.6/xfs_sync.h
+++ b/fs/xfs/linux-2.6/xfs_sync.h
@@ -28,7 +28,6 @@ typedef struct bhv_vfs_sync_work {
} bhv_vfs_sync_work_t;

#define SYNC_ATTR 0x0001 /* sync attributes */
-#define SYNC_CLOSE 0x0002 /* close file system down */
#define SYNC_DELWRI 0x0004 /* look at delayed writes */
#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
--
1.5.6