f2fs: should put the dnode when NEW_ADDR is detected
When get_dnode_of_data() in get_data_block() returns a successful dnode, we
should put the dnode.
But, previously, if its data block address is equal to NEW_ADDR, we didn't do
that, resulting in a deadlock condition.
So, this patch splits original error conditions with this case, and then calls
f2fs_put_dnode before finishing the function.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 0879d2a..991e368 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -626,11 +626,13 @@
/* When reading holes, we need its node page */
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, pgofs, mode);
- if (err || dn.data_blkaddr == NEW_ADDR) {
+ if (err) {
if (err == -ENOENT)
err = 0;
goto unlock_out;
}
+ if (dn.data_blkaddr == NEW_ADDR)
+ goto put_out;
if (dn.data_blkaddr != NULL_ADDR) {
map_bh(bh_result, inode->i_sb, dn.data_blkaddr);
@@ -659,11 +661,14 @@
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, pgofs, mode);
- if (err || dn.data_blkaddr == NEW_ADDR) {
+ if (err) {
if (err == -ENOENT)
err = 0;
goto unlock_out;
}
+ if (dn.data_blkaddr == NEW_ADDR)
+ goto put_out;
+
end_offset = IS_INODE(dn.node_page) ?
ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK;
}
