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authorDean Roehrich <roehrich@sgi.com>2005-06-22 10:20:44 +1000
committerNathan Scott <nathans@sgi.com>2005-06-22 10:20:44 +1000
commite1a40fa907498030b6e432c0dbcb06d7a9f14ee3 (patch)
tree8f6ad8643346358ef39d7d28d1e001af81eb6e9a
parentad89d0212e32c5cf27dfcbad67b91a32b9878529 (diff)
[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>
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c10
-rw-r--r--fs/xfs/xfs_dmapi.h23
2 files changed, 20 insertions, 13 deletions
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 46b61a859af..acab58c4804 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -280,10 +280,11 @@ xfs_read(
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 @@ retry:
!(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 @@ retry:
out_unlock_isem:
if (need_isem)
up(&inode->i_sem);
+ out_nounlocks:
return -error;
}
diff --git a/fs/xfs/xfs_dmapi.h b/fs/xfs/xfs_dmapi.h
index 16cf9f7a478..55c17adaaa3 100644
--- a/fs/xfs/xfs_dmapi.h
+++ b/fs/xfs/xfs_dmapi.h
@@ -166,27 +166,32 @@ typedef enum {
#define DM_FLAGS_NDELAY 0x001 /* return EAGAIN after dm_pending() */
#define DM_FLAGS_UNWANTED 0x002 /* event not in fsys dm_eventset_t */
#define DM_FLAGS_ISEM 0x004 /* thread holds i_sem */
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,4,21)
-/* i_alloc_sem was added in 2.4.22-pre1 */
#define DM_FLAGS_IALLOCSEM_RD 0x010 /* thread holds i_alloc_sem rd */
#define DM_FLAGS_IALLOCSEM_WR 0x020 /* thread holds i_alloc_sem wr */
-#endif
-#endif
/*
* Based on IO_ISDIRECT, decide which i_ flag is set.
*/
-#ifdef DM_FLAGS_IALLOCSEM_RD
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,0)
+#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
+ DM_FLAGS_ISEM : 0)
+#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
+#endif
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) && \
+ (LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,22))
#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
DM_FLAGS_IALLOCSEM_RD : DM_FLAGS_ISEM)
#define DM_SEM_FLAG_WR (DM_FLAGS_IALLOCSEM_WR | DM_FLAGS_ISEM)
-#else
+#endif
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,4,21)
#define DM_SEM_FLAG_RD(ioflags) (((ioflags) & IO_ISDIRECT) ? \
0 : DM_FLAGS_ISEM)
#define DM_SEM_FLAG_WR (DM_FLAGS_ISEM)
#endif
+
/*
* Macros to turn caller specified delay/block flags into
* dm_send_xxxx_event flag DM_FLAGS_NDELAY.
@@ -209,8 +214,4 @@ void xfs_dm_exit(struct file_system_type *);
#define XFS_DM_EXIT(fstype)
#endif
-#define HAVE_XFS_DM_MM
-int xfs_dm_mm_get(struct vm_area_struct *vma);
-void xfs_dm_mm_put(struct vm_area_struct *vma);
-
#endif /* __XFS_DMAPI_H__ */