[XFS] Handle inode semaphores properly for dmapi queues
SGI-PV: 931572
SGI-Modid: xfs-linux-melb:xfs-kern:189560a
Signed-off-by: Dean Roehrich <roehrich@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 46b61a8..acab58c 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -280,10 +280,11 @@
if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ) &&
!(ioflags & IO_INVIS)) {
vrwlock_t locktype = VRWLOCK_READ;
+ int dmflags = FILP_DELAY_FLAG(file) | DM_SEM_FLAG_RD(ioflags);
ret = -XFS_SEND_DATA(mp, DM_EVENT_READ,
BHV_TO_VNODE(bdp), *offset, size,
- FILP_DELAY_FLAG(file), &locktype);
+ dmflags, &locktype);
if (ret) {
xfs_iunlock(ip, XFS_IOLOCK_SHARED);
goto unlock_isem;
@@ -843,11 +844,15 @@
!(ioflags & IO_INVIS)) {
xfs_rwunlock(bdp, locktype);
+ if (need_isem)
+ up(&inode->i_sem);
error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp,
DM_RIGHT_NULL, vp, DM_RIGHT_NULL, NULL, NULL,
0, 0, 0); /* Delay flag intentionally unused */
if (error)
- goto out_unlock_isem;
+ goto out_nounlocks;
+ if (need_isem)
+ down(&inode->i_sem);
xfs_rwlock(bdp, locktype);
pos = xip->i_d.di_size;
ret = 0;
@@ -962,6 +967,7 @@
out_unlock_isem:
if (need_isem)
up(&inode->i_sem);
+ out_nounlocks:
return -error;
}