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Btrfs: don't check nodes for extent items

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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>
This commit is contained in:
Josef Bacik 2014-06-05 16:08:45 -04:00 committed by Chris Mason
parent 6fdef6d43c
commit 8a56457f5f
1 changed files with 3 additions and 2 deletions
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5
fs/btrfs/backref.c
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@ -988,11 +988,12 @@ again:
goto out; goto out;
} }
if (ref->count && ref->parent) { if (ref->count && ref->parent) {
if (extent_item_pos && !ref->inode_list) { if (extent_item_pos && !ref->inode_list &&
ref->level == 0) {
u32 bsz; u32 bsz;
struct extent_buffer *eb; struct extent_buffer *eb;
bsz = btrfs_level_size(fs_info->extent_root, bsz = btrfs_level_size(fs_info->extent_root,
info_level); ref->level);
eb = read_tree_block(fs_info->extent_root, eb = read_tree_block(fs_info->extent_root,
ref->parent, bsz, 0); ref->parent, bsz, 0);
if (!eb || !extent_buffer_uptodate(eb)) { if (!eb || !extent_buffer_uptodate(eb)) {