diff options
| author | Chao Yu <yuchao0@huawei.com> | 2016-05-05 19:13:02 +0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:33:28 +0200 |
| commit | 7c259bdd5b3732f9204510e8b87d64fdbc9c7d90 (patch) | |
| tree | 0abb54931c503bdb713f11d3adcb2125962736c0 | |
| parent | 5ab73dd8651e41a9f7c2db2b0931309333b39830 (diff) | |
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>
| -rw-r--r-- | fs/f2fs/data.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index b49da4baf..7dab41944 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; - } } } |