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Date: Sun, 29 Mar 2009 19:31:03 +0200
From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To: xfs-masters@....sgi.com
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] xfs: fix blkdev_issue_flush() failure handling
blkdev_issue_flush() may fail (i.e. due to media error on FLUSH CACHE
command execution) so its users should check for the return value.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
fs/xfs/linux-2.6/xfs_buf.c | 1 +
fs/xfs/linux-2.6/xfs_super.c | 4 ++--
fs/xfs/linux-2.6/xfs_super.h | 2 +-
fs/xfs/xfs_vnodeops.c | 19 +++++++++++++++----
4 files changed, 19 insertions(+), 7 deletions(-)
Index: b/fs/xfs/linux-2.6/xfs_buf.c
===================================================================
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1446,6 +1446,7 @@ xfs_free_buftarg(
{
xfs_flush_buftarg(btp, 1);
if (mp->m_flags & XFS_MOUNT_BARRIER)
+ /* FIXME: check return value */
xfs_blkdev_issue_flush(btp);
xfs_free_bufhash(btp);
iput(btp->bt_mapping->host);
Index: b/fs/xfs/linux-2.6/xfs_super.c
===================================================================
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -721,11 +721,11 @@ xfs_mountfs_check_barriers(xfs_mount_t *
}
}
-void
+int
xfs_blkdev_issue_flush(
xfs_buftarg_t *buftarg)
{
- blkdev_issue_flush(buftarg->bt_bdev, NULL);
+ return blkdev_issue_flush(buftarg->bt_bdev, NULL);
}
STATIC void
Index: b/fs/xfs/linux-2.6/xfs_super.h
===================================================================
--- a/fs/xfs/linux-2.6/xfs_super.h
+++ b/fs/xfs/linux-2.6/xfs_super.h
@@ -89,7 +89,7 @@ struct block_device;
extern __uint64_t xfs_max_file_offset(unsigned int);
-extern void xfs_blkdev_issue_flush(struct xfs_buftarg *);
+extern int xfs_blkdev_issue_flush(struct xfs_buftarg *);
extern const struct export_operations xfs_export_operations;
extern struct xattr_handler *xfs_xattr_handlers[];
Index: b/fs/xfs/xfs_vnodeops.c
===================================================================
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -597,6 +597,7 @@ xfs_fsync(
xfs_trans_t *tp;
int error;
int log_flushed = 0, changed = 1;
+ int tmp_ret;
xfs_itrace_entry(ip);
@@ -679,19 +680,29 @@ xfs_fsync(
}
if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) {
+ xfs_buftarg_t *btp;
+
/*
* If the log write didn't issue an ordered tag we need
* to flush the disk cache for the data device now.
*/
- if (!log_flushed)
- xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp);
+ if (!log_flushed) {
+ btp = ip->i_mount->m_ddev_targp;
+ tmp_ret = xfs_blkdev_issue_flush(btp);
+ if (error == 0 && tmp_ret < 0 && tmp_ret != -EOPNOTSUPP)
+ error = tmp_ret;
+ }
/*
* If this inode is on the RT dev we need to flush that
* cache as well.
*/
- if (XFS_IS_REALTIME_INODE(ip))
- xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp);
+ if (XFS_IS_REALTIME_INODE(ip)) {
+ btp = ip->i_mount->m_rtdev_targp;
+ tmp_ret = xfs_blkdev_issue_flush(btp);
+ if (error == 0 && tmp_ret < 0 && tmp_ret != -EOPNOTSUPP)
+ error = tmp_ret;
+ }
}
return error;
--
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