[XFS] add helper to get xfs_inode from vnode

SGI-PV: 947206
SGI-Modid: xfs-linux-melb:xfs-kern:203960a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

4 files changed, 20 insertions, 11 deletions

diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 52707b5ddcb8..d1db8c17a74e 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -54,7 +54,6 @@ xfs_page_trace(
         int             mask)
 {
         xfs_inode_t     *ip;
-        bhv_desc_t      *bdp;
         vnode_t         *vp = LINVFS_GET_VP(inode);
         loff_t          isize = i_size_read(inode);
         loff_t          offset = page_offset(page);
@@ -63,8 +62,7 @@ xfs_page_trace(
         if (page_has_buffers(page))
                 xfs_count_page_state(page, &delalloc, &unmapped, &unwritten);
 
-        bdp = vn_bhv_lookup(VN_BHV_HEAD(vp), &xfs_vnodeops);
-        ip = XFS_BHVTOI(bdp);
+        ip = xfs_vtoi(vp);
         if (!ip->i_rwtrace)
                 return;
 
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 06111d0bbae4..ced4404339c7 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -509,16 +509,14 @@ linvfs_open_exec(
         vnode_t         *vp = LINVFS_GET_VP(inode);
         xfs_mount_t     *mp = XFS_VFSTOM(vp->v_vfsp);
         int             error = 0;
-        bhv_desc_t      *bdp;
         xfs_inode_t     *ip;
 
         if (vp->v_vfsp->vfs_flag & VFS_DMI) {
-                bdp = vn_bhv_lookup(VN_BHV_HEAD(vp), &xfs_vnodeops);
-                if (!bdp) {
+                ip = xfs_vtoi(vp);
+                if (!ip) {
                         error = -EINVAL;
                         goto open_exec_out;
                 }
-                ip = XFS_BHVTOI(bdp);
                 if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_READ)) {
                         error = -XFS_SEND_DATA(mp, DM_EVENT_READ, vp,
                                                0, 0, 0, NULL);
diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index 7ad7b680e996..b3b2cfda273c 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -145,13 +145,10 @@ xfs_find_handle(
 
         if (cmd != XFS_IOC_PATH_TO_FSHANDLE) {
                 xfs_inode_t     *ip;
-                bhv_desc_t      *bhv;
                 int             lock_mode;
 
                 /* need to get access to the xfs_inode to read the generation */
-                bhv = vn_bhv_lookup_unlocked(VN_BHV_HEAD(vp), &xfs_vnodeops);
-                ASSERT(bhv);
-                ip = XFS_BHVTOI(bhv);
+                ip = xfs_vtoi(vp);
                 ASSERT(ip);
                 lock_mode = xfs_ilock_map_shared(ip);
 
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index fe5e9894fdee..d388d14efe3e 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -59,6 +59,22 @@
         (S_ISDIR(inode->i_mode) && inode->i_sb->s_flags & MS_NODIRATIME))
 
 /*
+ * Get a XFS inode from a given vnode.
+ */
+xfs_inode_t *
+xfs_vtoi(
+        struct vnode    *vp)
+{
+        bhv_desc_t      *bdp;
+
+        bdp = bhv_lookup_range(VN_BHV_HEAD(vp),
+                        VNODE_POSITION_XFS, VNODE_POSITION_XFS);
+        if (unlikely(bdp == NULL))
+                return NULL;
+        return XFS_BHVTOI(bdp);
+}
+
+/*
  * Bring the atime in the XFS inode uptodate.
  * Used before logging the inode to disk or when the Linux inode goes away.
  */