diff options
| -rw-r--r-- | fs/btrfs/delayed-ref.c | 10 | ||||
| -rw-r--r-- | fs/btrfs/delayed-ref.h | 1 |
2 files changed, 8 insertions, 3 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 759fa247ced8..cbf7dc8ae3ec 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -450,8 +450,12 @@ static noinline int __btrfs_add_delayed_ref(struct btrfs_trans_handle *trans, * the head node stores the sum of all the mods, so dropping a ref * should drop the sum in the head node by one. */ - if (parent == (u64)-1 && action == BTRFS_DROP_DELAYED_REF) - count_mod = -1; + if (parent == (u64)-1) { + if (action == BTRFS_DROP_DELAYED_REF) + count_mod = -1; + else if (action == BTRFS_UPDATE_DELAYED_HEAD) + count_mod = 0; + } /* * BTRFS_ADD_DELAYED_EXTENT means that we need to update @@ -647,7 +651,7 @@ int btrfs_update_delayed_ref(struct btrfs_trans_handle *trans, */ ret = __btrfs_add_delayed_ref(trans, &head_ref->node, bytenr, num_bytes, (u64)-1, 0, 0, 0, - BTRFS_ADD_DELAYED_REF, 0); + BTRFS_UPDATE_DELAYED_HEAD, 0); BUG_ON(ret); ret = __btrfs_add_delayed_ref(trans, &ref->node, bytenr, num_bytes, diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index 57153fcc347b..3bec2ff0b15c 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -22,6 +22,7 @@ #define BTRFS_ADD_DELAYED_REF 1 /* add one backref to the tree */ #define BTRFS_DROP_DELAYED_REF 2 /* delete one backref from the tree */ #define BTRFS_ADD_DELAYED_EXTENT 3 /* record a full extent allocation */ +#define BTRFS_UPDATE_DELAYED_HEAD 4 /* not changing ref count on head ref */ struct btrfs_delayed_ref_node { struct rb_node rb_node; |