The dedup ref is quite a special one, it is just used to store the hash value
of the extent and cannot be used to find data, so we skip it during backref
walking.
Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
fs/btrfs/backref.c | 9 +++++++++
fs/btrfs/relocation.c | 3 +++
2 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 0552a59..6ff57d2 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -588,6 +588,9 @@ static int __add_delayed_refs(struct btrfs_delayed_ref_head
*head, u64 seq,
key.objectid = ref->objectid;
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = ref->offset;
+ if (ref->root == BTRFS_DEDUP_TREE_OBJECTID)
+ break;
+
ret = __add_prelim_ref(prefs, ref->root, &key, 0, 0,
node->bytenr,
node->ref_mod * sgn, GFP_ATOMIC);
@@ -706,6 +709,9 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = btrfs_extent_data_ref_offset(leaf, dref);
root = btrfs_extent_data_ref_root(leaf, dref);
+ if (root == BTRFS_DEDUP_TREE_OBJECTID)
+ break;
+
ret = __add_prelim_ref(prefs, root, &key, 0, 0,
bytenr, count, GFP_NOFS);
break;
@@ -789,6 +795,9 @@ static int __add_keyed_refs(struct btrfs_fs_info *fs_info,
key.type = BTRFS_EXTENT_DATA_KEY;
key.offset = btrfs_extent_data_ref_offset(leaf, dref);
root = btrfs_extent_data_ref_root(leaf, dref);
+ if (root == BTRFS_DEDUP_TREE_OBJECTID)
+ break;
+
ret = __add_prelim_ref(prefs, root, &key, 0, 0,
bytenr, count, GFP_NOFS);
break;
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index a5a2632..d9bb01f 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3486,6 +3486,9 @@ static int find_data_references(struct reloc_control *rc,
ref_offset = btrfs_extent_data_ref_offset(leaf, ref);
ref_count = btrfs_extent_data_ref_count(leaf, ref);
+ if (ref_root == BTRFS_DEDUP_TREE_OBJECTID)
+ return 0;
+
/*
* This is an extent belonging to the free space cache, lets just delete
* it and redo the search.
--
1.7.7
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