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authorDavid Chinner <dgc@sgi.com>2007-02-10 18:37:22 +1100
committerTim Shimmin <tes@sgi.com>2007-02-10 18:37:22 +1100
commit3c0dc77b42cee99c71e913765073888620d442fa (patch)
treebb11f93ab00e83b3b020e51d4ddf2e47f6ed8aa0
parentf7c99b6fc7b3791cd24e0763cd4967d744c164a3 (diff)
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[XFS] Make freeze code a little cleaner.
Fixes a few small issues (mostly cosmetic) that were picked up during the review cycle for the last set of freeze path changes. SGI-PV: 959267 SGI-Modid: xfs-linux-melb:xfs-kern:28035a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Tim Shimmin <tes@sgi.com>
-rw-r--r--fs/xfs/linux-2.6/xfs_super.c2
-rw-r--r--fs/xfs/linux-2.6/xfs_vfs.h3
-rw-r--r--fs/xfs/xfs_vfsops.c17
3 files changed, 11 insertions, 11 deletions
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index f3ad51602ebb..2a94859b9399 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -667,7 +667,7 @@ xfs_fs_sync_super(
* occur here so don't bother flushing the buftarg (i.e
* SYNC_QUIESCE) because it'll just get dirty again.
*/
- flags = SYNC_FSDATA | SYNC_DELWRI | SYNC_WAIT | SYNC_DIO_WAIT;
+ flags = SYNC_FSDATA | SYNC_DELWRI | SYNC_WAIT | SYNC_IOWAIT;
} else
flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0);
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index 558823a83065..e2c2ce98ab5b 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -91,8 +91,7 @@ typedef enum {
#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
-#define SYNC_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */
-#define SYNC_DIO_WAIT 0x0200 /* wait for direct I/O to complete */
+#define SYNC_IOWAIT 0x0100 /* wait for all I/O to complete */
#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index c2a6eab7fa2d..29f72f613782 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -872,10 +872,10 @@ xfs_statvfs(
* this by simply making sure the log gets flushed
* if SYNC_BDFLUSH is set, and by actually writing it
* out otherwise.
- * SYNC_DIO_WAIT - The caller wants us to wait for all direct I/Os
- * as well to ensure all data I/O completes before we
- * return. Forms the drain side of the write barrier needed
- * to safely quiesce the filesystem.
+ * SYNC_IOWAIT - The caller wants us to wait for all data I/O to complete
+ * before we return (including direct I/O). Forms the drain
+ * side of the write barrier needed to safely quiesce the
+ * filesystem.
*
*/
/*ARGSUSED*/
@@ -1174,10 +1174,11 @@ xfs_sync_inodes(
}
/*
- * When freezing, we need to wait ensure direct I/O is complete
- * as well to ensure all data modification is complete here
+ * When freezing, we need to wait ensure all I/O (including direct
+ * I/O) is complete to ensure no further data modification can take
+ * place after this point
*/
- if (flags & SYNC_DIO_WAIT)
+ if (flags & SYNC_IOWAIT)
vn_iowait(vp);
if (flags & SYNC_BDFLUSH) {
@@ -1975,7 +1976,7 @@ xfs_freeze(
/* flush inodes and push all remaining buffers out to disk */
xfs_quiesce_fs(mp);
- BUG_ON(atomic_read(&mp->m_active_trans) > 0);
+ ASSERT_ALWAYS(atomic_read(&mp->m_active_trans) == 0);
/* Push the superblock and write an unmount record */
xfs_log_unmount_write(mp);