diff options
| -rw-r--r-- | fs/ext4/inode.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 0d8971b819e9..e4b0722717b3 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3577,10 +3577,20 @@ retry: iomap->type = delalloc ? IOMAP_DELALLOC : IOMAP_HOLE; iomap->addr = IOMAP_NULL_ADDR; } else { - if (map.m_flags & EXT4_MAP_MAPPED) { - iomap->type = IOMAP_MAPPED; - } else if (map.m_flags & EXT4_MAP_UNWRITTEN) { + /* + * Flags passed into ext4_map_blocks() for direct I/O writes + * can result in m_flags having both EXT4_MAP_MAPPED and + * EXT4_MAP_UNWRITTEN bits set. In order for any allocated + * unwritten extents to be converted into written extents + * correctly within the ->end_io() handler, we need to ensure + * that the iomap->type is set appropriately. Hence the reason + * why we need to check whether EXT4_MAP_UNWRITTEN is set + * first. + */ + if (map.m_flags & EXT4_MAP_UNWRITTEN) { iomap->type = IOMAP_UNWRITTEN; + } else if (map.m_flags & EXT4_MAP_MAPPED) { + iomap->type = IOMAP_MAPPED; } else { WARN_ON_ONCE(1); return -EIO; |