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authorChao Yu <yuchao0@huawei.com>2016-05-05 14:13:02 +0300
committerJaegeuk Kim <jaegeuk@kernel.org>2016-05-07 20:32:32 +0300
commit43473f96453f0b075c480a26ec4fc846d5fb3bd4 (patch)
treeb006060f4d1b8f34616b949c9dc4f278b39015cd /fs/f2fs
parentfb58ae22067e0595d974e3d856522c1ed6d2d7bf (diff)
downloadlinux-43473f96453f0b075c480a26ec4fc846d5fb3bd4.tar.xz
f2fs: fix incorrect mapping in ->bmap
Currently, generic_block_bmap is used in f2fs_bmap, its semantics is when the mapping is been found, return position of target physical block, otherwise return zero. But, previously, when there is no mapping info for specified logical block, f2fs_bmap will map target physical block to a uninitialized variable, which should be wrong. Fix it. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 888f1781ae0b..96b035319889 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -648,6 +648,8 @@ next_dnode:
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, pgofs, mode);
if (err) {
+ if (flag == F2FS_GET_BLOCK_BMAP)
+ map->m_pblk = 0;
if (err == -ENOENT) {
err = 0;
if (map->m_next_pgofs)
@@ -683,17 +685,18 @@ next_block:
map->m_flags = F2FS_MAP_NEW;
blkaddr = dn.data_blkaddr;
} else {
+ if (flag == F2FS_GET_BLOCK_BMAP) {
+ map->m_pblk = 0;
+ goto sync_out;
+ }
if (flag == F2FS_GET_BLOCK_FIEMAP &&
blkaddr == NULL_ADDR) {
if (map->m_next_pgofs)
*map->m_next_pgofs = pgofs + 1;
}
if (flag != F2FS_GET_BLOCK_FIEMAP ||
- blkaddr != NEW_ADDR) {
- if (flag == F2FS_GET_BLOCK_BMAP)
- err = -ENOENT;
+ blkaddr != NEW_ADDR)
goto sync_out;
- }
}
}