Merge branch 'gfs2-iopen' into for-next

1 files changed, 34 insertions, 10 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index e3a27fd284dd..850b44a5ae37 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -114,6 +114,10 @@ static void gfs2_set_iop(struct inode *inode)
  * placeholder because it doesn't otherwise make sense), the on-disk block type
  * is verified to be @blktype.
  *
+ * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE)
+ * if it detects that @no_formal_ino doesn't match the actual inode generation
+ * number.  However, it doesn't always know unless @type is DT_UNKNOWN.
+ *
  * Returns: A VFS inode, or an error
  */
 
@@ -157,6 +161,11 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 			if (error)
 				goto fail;
 
+			error = -ESTALE;
+			if (no_formal_ino &&
+			    gfs2_inode_already_deleted(ip->i_gl, no_formal_ino))
+				goto fail;
+
 			if (blktype != GFS2_BLKST_FREE) {
 				error = gfs2_check_blk_type(sdp, no_addr,
 							    blktype);
@@ -170,6 +179,7 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 		if (unlikely(error))
 			goto fail;
+		gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
 		glock_set_object(ip->i_iopen_gh.gh_gl, ip);
 		gfs2_glock_put(io_gl);
 		io_gl = NULL;
@@ -188,13 +198,23 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
 			inode->i_mode = DT2IF(type);
 		}
 
+		if (gfs2_holder_initialized(&i_gh))
+			gfs2_glock_dq_uninit(&i_gh);
+
 		gfs2_set_iop(inode);
+	}
 
-		unlock_new_inode(inode);
+	if (no_formal_ino && ip->i_no_formal_ino &&
+	    no_formal_ino != ip->i_no_formal_ino) {
+		if (inode->i_state & I_NEW)
+			goto fail;
+		iput(inode);
+		return ERR_PTR(-ESTALE);
 	}
 
-	if (gfs2_holder_initialized(&i_gh))
-		gfs2_glock_dq_uninit(&i_gh);
+	if (inode->i_state & I_NEW)
+		unlock_new_inode(inode);
+
 	return inode;
 
 fail:
@@ -206,23 +226,26 @@ fail:
 	return ERR_PTR(error);
 }
 
+/**
+ * gfs2_lookup_by_inum - look up an inode by inode number
+ * @sdp: The super block
+ * @no_addr: The inode number
+ * @no_formal_ino: The inode generation number (0 for any)
+ * @blktype: Requested block type (see gfs2_inode_lookup)
+ */
 struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
-				  u64 *no_formal_ino, unsigned int blktype)
+				  u64 no_formal_ino, unsigned int blktype)
 {
 	struct super_block *sb = sdp->sd_vfs;
 	struct inode *inode;
 	int error;
 
-	inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, blktype);
+	inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino,
+				  blktype);
 	if (IS_ERR(inode))
 		return inode;
 
-	/* Two extra checks for NFS only */
 	if (no_formal_ino) {
-		error = -ESTALE;
-		if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
-			goto fail_iput;
-
 		error = -EIO;
 		if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
 			goto fail_iput;
@@ -724,6 +747,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	if (error)
 		goto fail_gunlock2;
 
+	gfs2_cancel_delete_work(ip->i_iopen_gh.gh_gl);
 	glock_set_object(ip->i_iopen_gh.gh_gl, ip);
 	gfs2_set_iop(inode);
 	insert_inode_hash(inode);