[XFS] cleanup vnode use in xfs_link

SGI-PV: 976035
SGI-Modid: xfs-linux-melb:xfs-kern:30547a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

fs/xfs/linux-2.6/xfs_iops.c

@@ -395,23 +395,22 @@ xfs_vn_link(
 	struct inode	*dir,
 	struct dentry	*dentry)
 {
-	struct inode	*ip;	/* inode of guy being linked to */
-	bhv_vnode_t	*vp;	/* vp of name being linked */
+	struct inode	*inode;	/* inode of guy being linked to */
 	int		error;
 
-	ip = old_dentry->d_inode;	/* inode being linked to */
-	vp = vn_from_inode(ip);
+	inode = old_dentry->d_inode;
 
-	VN_HOLD(vp);
-	error = xfs_link(XFS_I(dir), vp, dentry);
+	igrab(inode);
+	error = xfs_link(XFS_I(dir), XFS_I(inode), dentry);
 	if (unlikely(error)) {
-		VN_RELE(vp);
-	} else {
-		xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
-		xfs_validate_fields(ip);
-		d_instantiate(dentry, ip);
+		iput(inode);
+		return -error;
 	}
-	return -error;
+
+	xfs_iflags_set(XFS_I(dir), XFS_IMODIFIED);
+	xfs_validate_fields(inode);
+	d_instantiate(dentry, inode);
+	return 0;
 }
 
 STATIC int

fs/xfs/xfs_vnodeops.c

@@ -2471,12 +2471,10 @@ xfs_remove(
 int
 xfs_link(
 	xfs_inode_t		*tdp,
-	bhv_vnode_t		*src_vp,
+	xfs_inode_t		*sip,
 	bhv_vname_t		*dentry)
 {
-	bhv_vnode_t		*target_dir_vp = XFS_ITOV(tdp);
 	xfs_mount_t		*mp = tdp->i_mount;
-	xfs_inode_t		*sip = xfs_vtoi(src_vp);
 	xfs_trans_t		*tp;
 	xfs_inode_t		*ips[2];
 	int			error;
@@ -2489,10 +2487,10 @@ xfs_link(
 	int			target_namelen;
 
 	xfs_itrace_entry(tdp);
-	xfs_itrace_entry(xfs_vtoi(src_vp));
+	xfs_itrace_entry(sip);
 
 	target_namelen = VNAMELEN(dentry);
-	ASSERT(!VN_ISDIR(src_vp));
+	ASSERT(!S_ISDIR(sip->i_d.di_mode));
 
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return XFS_ERROR(EIO);
@@ -2544,8 +2542,8 @@ xfs_link(
 	 * xfs_trans_cancel will both unlock the inodes and
 	 * decrement the associated ref counts.
 	 */
-	VN_HOLD(src_vp);
-	VN_HOLD(target_dir_vp);
+	IHOLD(sip);
+	IHOLD(tdp);
 	xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL);
 

fs/xfs/xfs_vnodeops.h

@@ -28,7 +28,7 @@ int xfs_lookup(struct xfs_inode *dp, bhv_vname_t *dentry,
 int xfs_create(struct xfs_inode *dp, bhv_vname_t *dentry, mode_t mode,
 		xfs_dev_t rdev, struct xfs_inode **ipp, struct cred *credp);
 int xfs_remove(struct xfs_inode *dp, bhv_vname_t	*dentry);
-int xfs_link(struct xfs_inode *tdp, bhv_vnode_t *src_vp,
+int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
 		bhv_vname_t *dentry);
 int xfs_mkdir(struct xfs_inode *dp, bhv_vname_t *dentry,
 		mode_t mode, struct xfs_inode **ipp, struct cred *credp);