xfs: set up inode operation vectors later

In the next patch we'll set up different inode operations for inline vs
out of line symlinks, for that we need to make sure the flags are already
set up properly.

[dchinner: added xfs_setup_iops() call to xfs_rename_alloc_whiteout()]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_inode.c

@@ -2855,6 +2855,7 @@ xfs_rename_alloc_whiteout(
 	 * and flag it as linkable.
 	 */
 	drop_nlink(VFS_I(tmpfile));
+	xfs_setup_iops(tmpfile);
 	xfs_finish_inode_setup(tmpfile);
 	VFS_I(tmpfile)->i_state |= I_LINKABLE;
 

fs/xfs/xfs_inode.h

@@ -440,14 +440,16 @@ loff_t	__xfs_seek_hole_data(struct inode *inode, loff_t start,
 
 
 /* from xfs_iops.c */
+extern void xfs_setup_inode(struct xfs_inode *ip);
+extern void xfs_setup_iops(struct xfs_inode *ip);
+
 /*
  * When setting up a newly allocated inode, we need to call
  * xfs_finish_inode_setup() once the inode is fully instantiated at
  * the VFS level to prevent the rest of the world seeing the inode
  * before we've completed instantiation. Otherwise we can do it
  * the moment the inode lookup is complete.
  */
-extern void xfs_setup_inode(struct xfs_inode *ip);
 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
 {
 	xfs_iflags_clear(ip, XFS_INEW);
@@ -458,6 +460,7 @@ static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
 {
 	xfs_setup_inode(ip);
+	xfs_setup_iops(ip);
 	xfs_finish_inode_setup(ip);
 }
 

fs/xfs/xfs_iops.c

@@ -181,6 +181,8 @@ xfs_generic_create(
 	}
 #endif
 
+	xfs_setup_iops(ip);
+
 	if (tmpfile)
 		d_tmpfile(dentry, inode);
 	else
@@ -368,6 +370,8 @@ xfs_vn_symlink(
 	if (unlikely(error))
 		goto out_cleanup_inode;
 
+	xfs_setup_iops(cip);
+
 	d_instantiate(dentry, inode);
 	xfs_finish_inode_setup(cip);
 	return 0;
@@ -1193,7 +1197,7 @@ xfs_diflags_to_iflags(
 }
 
 /*
- * Initialize the Linux inode and set up the operation vectors.
+ * Initialize the Linux inode.
  *
  * When reading existing inodes from disk this is called directly from xfs_iget,
  * when creating a new inode it is called from xfs_ialloc after setting up the
@@ -1232,22 +1236,50 @@ xfs_setup_inode(
 	i_size_write(inode, ip->i_d.di_size);
 	xfs_diflags_to_iflags(inode, ip);
 
-	ip->d_ops = ip->i_mount->m_nondir_inode_ops;
-	lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
+	if (S_ISDIR(inode->i_mode)) {
+		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
+		ip->d_ops = ip->i_mount->m_dir_inode_ops;
+	} else {
+		ip->d_ops = ip->i_mount->m_nondir_inode_ops;
+		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
+	}
+
+	/*
+	 * Ensure all page cache allocations are done from GFP_NOFS context to
+	 * prevent direct reclaim recursion back into the filesystem and blowing
+	 * stacks or deadlocking.
+	 */
+	gfp_mask = mapping_gfp_mask(inode->i_mapping);
+	mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
+
+	/*
+	 * If there is no attribute fork no ACL can exist on this inode,
+	 * and it can't have any file capabilities attached to it either.
+	 */
+	if (!XFS_IFORK_Q(ip)) {
+		inode_has_no_xattr(inode);
+		cache_no_acl(inode);
+	}
+}
+
+void
+xfs_setup_iops(
+	struct xfs_inode	*ip)
+{
+	struct inode		*inode = &ip->i_vnode;
+
 	switch (inode->i_mode & S_IFMT) {
 	case S_IFREG:
 		inode->i_op = &xfs_inode_operations;
 		inode->i_fop = &xfs_file_operations;
 		inode->i_mapping->a_ops = &xfs_address_space_operations;
 		break;
 	case S_IFDIR:
-		lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
 		if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
 			inode->i_op = &xfs_dir_ci_inode_operations;
 		else
 			inode->i_op = &xfs_dir_inode_operations;
 		inode->i_fop = &xfs_dir_file_operations;
-		ip->d_ops = ip->i_mount->m_dir_inode_ops;
 		break;
 	case S_IFLNK:
 		inode->i_op = &xfs_symlink_inode_operations;
@@ -1259,21 +1291,4 @@ xfs_setup_inode(
 		init_special_inode(inode, inode->i_mode, inode->i_rdev);
 		break;
 	}
-
-	/*
-	 * Ensure all page cache allocations are done from GFP_NOFS context to
-	 * prevent direct reclaim recursion back into the filesystem and blowing
-	 * stacks or deadlocking.
-	 */
-	gfp_mask = mapping_gfp_mask(inode->i_mapping);
-	mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
-
-	/*
-	 * If there is no attribute fork no ACL can exist on this inode,
-	 * and it can't have any file capabilities attached to it either.
-	 */
-	if (!XFS_IFORK_Q(ip)) {
-		inode_has_no_xattr(inode);
-		cache_no_acl(inode);
-	}
 }