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Btrfs: don't check nodes for extent items

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commit 8a56457f5f upstream.

The backref code was looking at nodes as well as leaves when we tried to
populate extent item entries.  This is not good, and although we go away with it
for the most part because we'd skip where disk_bytenr != random_memory,
sometimes random_memory would match and suddenly boom.  This fixes that problem.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josef Bacik
2014-06-05 16:08:45 -04:00
committed by Greg Kroah-Hartman
parent e517155065
commit efb57277b9
1 changed files with 3 additions and 2 deletions
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5
fs/btrfs/backref.c
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@@ -984,11 +984,12 @@ again:
goto out;
}
if (ref->count && ref->parent) {
if (extent_item_pos && !ref->inode_list) {
if (extent_item_pos && !ref->inode_list &&
ref->level == 0) {
u32 bsz;
struct extent_buffer *eb;
bsz = btrfs_level_size(fs_info->extent_root,
info_level);
ref->level);
eb = read_tree_block(fs_info->extent_root,
ref->parent, bsz, 0);
if (!eb || !extent_buffer_uptodate(eb)) {