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| author | Liu Bo <bo.li.liu@oracle.com> | 2013-01-07 10:10:12 +0000 |
|---|---|---|
| committer | Josef Bacik <josef@toxicpanda.com> | 2013-01-14 13:53:22 -0500 |
| commit | f9e4fb53938de5db01950c9dfe479703b2f5c964 (patch) | |
| tree | 95e9e8326d4a39feedc591c8d05de33d5db46d96 /fs/btrfs | |
| parent | 1214b53f90131fee1f950010c43e92455fe598ab (diff) | |
| download | kernel_goldelico_gta04-f9e4fb53938de5db01950c9dfe479703b2f5c964.zip kernel_goldelico_gta04-f9e4fb53938de5db01950c9dfe479703b2f5c964.tar.gz kernel_goldelico_gta04-f9e4fb53938de5db01950c9dfe479703b2f5c964.tar.bz2 | |
Btrfs: fix a bug when llseek for delalloc bytes behind prealloc extents
xfstests case 285 complains.
It it because btrfs did not try to find unwritten delalloc
bytes(only dirty pages, not yet writeback) behind prealloc
extents, it ends up finding nothing while we're with SEEK_DATA.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/file.c | 9 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 11 |
2 files changed, 14 insertions, 6 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index fa48051..841cfe3 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -2309,9 +2309,12 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin) } } - *offset = start; - free_extent_map(em); - break; + if (!test_bit(EXTENT_FLAG_PREALLOC, + &em->flags)) { + *offset = start; + free_extent_map(em); + break; + } } } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 4ddcf79..ac98384 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -5623,10 +5623,13 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag return em; if (em) { /* - * if our em maps to a hole, there might - * actually be delalloc bytes behind it + * if our em maps to + * - a hole or + * - a pre-alloc extent, + * there might actually be delalloc bytes behind it. */ - if (em->block_start != EXTENT_MAP_HOLE) + if (em->block_start != EXTENT_MAP_HOLE && + !test_bit(EXTENT_FLAG_PREALLOC, &em->flags)) return em; else hole_em = em; @@ -5708,6 +5711,8 @@ struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *pag */ em->block_start = hole_em->block_start; em->block_len = hole_len; + if (test_bit(EXTENT_FLAG_PREALLOC, &hole_em->flags)) + set_bit(EXTENT_FLAG_PREALLOC, &em->flags); } else { em->start = range_start; em->len = found; |