hfsplus: Add error propagation for hfsplus_ext_write_extent_locked

Implement error propagation through the callers of
hfsplus_ext_write_extent_locked().
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Christoph Hellwig <hch@lst.de>

fs/hfsplus/extents.c

@@ -119,23 +119,31 @@ static void __hfsplus_ext_write_extent(struct inode *inode,
 	set_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags);
 }
 
-static void hfsplus_ext_write_extent_locked(struct inode *inode)
+static int hfsplus_ext_write_extent_locked(struct inode *inode)
 {
+	int res;
+
 	if (HFSPLUS_I(inode)->extent_state & HFSPLUS_EXT_DIRTY) {
 		struct hfs_find_data fd;
 
-		if (!hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd)) {
-			__hfsplus_ext_write_extent(inode, &fd);
-			hfs_find_exit(&fd);
-		}
+		res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd);
+		if (res)
+			return res;
+		__hfsplus_ext_write_extent(inode, &fd);
+		hfs_find_exit(&fd);
 	}
+	return 0;
 }
 
-void hfsplus_ext_write_extent(struct inode *inode)
+int hfsplus_ext_write_extent(struct inode *inode)
 {
+	int res;
+
 	mutex_lock(&HFSPLUS_I(inode)->extents_lock);
-	hfsplus_ext_write_extent_locked(inode);
+	res = hfsplus_ext_write_extent_locked(inode);
 	mutex_unlock(&HFSPLUS_I(inode)->extents_lock);
+
+	return res;
 }
 
 static inline int __hfsplus_ext_read_extent(struct hfs_find_data *fd,
@@ -477,7 +485,9 @@ int hfsplus_file_extend(struct inode *inode)
 
 insert_extent:
 	dprint(DBG_EXTENT, "insert new extent\n");
-	hfsplus_ext_write_extent_locked(inode);
+	res = hfsplus_ext_write_extent_locked(inode);
+	if (res)
+		goto out;
 
 	memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
 	hip->cached_extents[0].start_block = cpu_to_be32(start);

fs/hfsplus/hfsplus_fs.h

@@ -374,7 +374,7 @@ extern const struct file_operations hfsplus_dir_operations;
 
 /* extents.c */
 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
-void hfsplus_ext_write_extent(struct inode *);
+int hfsplus_ext_write_extent(struct inode *);
 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
 int hfsplus_free_fork(struct super_block *, u32,
 		struct hfsplus_fork_raw *, int);

fs/hfsplus/super.c

@@ -135,9 +135,13 @@ static int hfsplus_system_write_inode(struct inode *inode)
 static int hfsplus_write_inode(struct inode *inode,
 		struct writeback_control *wbc)
 {
+	int err;
+
 	dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino);
 
-	hfsplus_ext_write_extent(inode);
+	err = hfsplus_ext_write_extent(inode);
+	if (err)
+		return err;
 
 	if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
 	    inode->i_ino == HFSPLUS_ROOT_CNID)