[XFS] add infrastructure for waiting on I/O completion at inode reclaim
time
SGI-PV: 934766
SGI-Modid: xfs-linux:xfs-kern:196854a
Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index 4a74569..9977afa3 100644
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -80,6 +80,7 @@
vnumber_t v_number; /* in-core vnode number */
vn_bhv_head_t v_bh; /* behavior head */
spinlock_t v_lock; /* VN_LOCK/VN_UNLOCK */
+ atomic_t v_iocount; /* outstanding I/O count */
#ifdef XFS_VNODE_TRACE
struct ktrace *v_trace; /* trace header structure */
#endif
@@ -506,6 +507,9 @@
extern void vn_revalidate_core(struct vnode *, vattr_t *);
extern void vn_remove(struct vnode *);
+extern void vn_iowait(struct vnode *vp);
+extern void vn_iowake(struct vnode *vp);
+
static inline int vn_count(struct vnode *vp)
{
return atomic_read(&LINVFS_GET_IP(vp)->i_count);