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>

3 files changed, 24 insertions, 10 deletions

diff --git a/fs/hfsplus/extents.c b/fs/hfsplus/extents.c
index 95065a89e7e2..5849e3ef35cc 100644
--- a/fs/hfsplus/extents.c
+++ b/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 @@ out:
 
 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);
diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index d6857523336d..0bebf7488feb 100644
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/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);
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index 2c1a72287fb5..84f56e1f6dac 100644
--- a/fs/hfsplus/super.c
+++ b/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)