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authorJan Schmidt <list.btrfs@jan-o-sch.net>2011-12-02 14:56:41 +0100
committerJan Schmidt <list.btrfs@jan-o-sch.net>2012-01-05 10:49:43 +0100
commit4692cf58aa7b81f721c1653d48db99ea41421d58 (patch)
tree0a5bf889142252d91bcc8df33a9c63c18024fe70 /fs/btrfs/ioctl.c
parent8da6d5815c592b713ecaf4f4f8b631f8359c96c4 (diff)
downloadop-kernel-dev-4692cf58aa7b81f721c1653d48db99ea41421d58.zip
op-kernel-dev-4692cf58aa7b81f721c1653d48db99ea41421d58.tar.gz
Btrfs: new backref walking code
The old backref iteration code could only safely be used on commit roots. Besides this limitation, it had bugs in finding the roots for these references. This commit replaces large parts of it by btrfs_find_all_roots() which a) really finds all roots and the correct roots, b) works correctly under heavy file system load, c) considers delayed refs. Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index c48f2e9..9b05268 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2976,7 +2976,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
{
int ret = 0;
int size;
- u64 extent_offset;
+ u64 extent_item_pos;
struct btrfs_ioctl_logical_ino_args *loi;
struct btrfs_data_container *inodes = NULL;
struct btrfs_path *path = NULL;
@@ -3007,15 +3007,17 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
}
ret = extent_from_logical(root->fs_info, loi->logical, path, &key);
+ btrfs_release_path(path);
if (ret & BTRFS_EXTENT_FLAG_TREE_BLOCK)
ret = -ENOENT;
if (ret < 0)
goto out;
- extent_offset = loi->logical - key.objectid;
+ extent_item_pos = loi->logical - key.objectid;
ret = iterate_extent_inodes(root->fs_info, path, key.objectid,
- extent_offset, build_ino_list, inodes);
+ extent_item_pos, build_ino_list,
+ inodes);
if (ret < 0)
goto out;
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