diff options
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index e4054e533f6d..571024bc632e 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -170,7 +170,7 @@ int __init btrfs_prelim_ref_init(void) return 0; } -void btrfs_prelim_ref_exit(void) +void __cold btrfs_prelim_ref_exit(void) { kmem_cache_destroy(btrfs_prelim_ref_cache); } @@ -738,7 +738,8 @@ static int add_missing_keys(struct btrfs_fs_info *fs_info, BUG_ON(ref->key_for_search.type); BUG_ON(!ref->wanted_disk_byte); - eb = read_tree_block(fs_info, ref->wanted_disk_byte, 0); + eb = read_tree_block(fs_info, ref->wanted_disk_byte, 0, + ref->level - 1, NULL); if (IS_ERR(eb)) { free_pref(ref); return PTR_ERR(eb); @@ -773,15 +774,12 @@ static int add_delayed_refs(const struct btrfs_fs_info *fs_info, struct btrfs_delayed_extent_op *extent_op = head->extent_op; struct btrfs_key key; struct btrfs_key tmp_op_key; - struct btrfs_key *op_key = NULL; struct rb_node *n; int count; int ret = 0; - if (extent_op && extent_op->update_key) { + if (extent_op && extent_op->update_key) btrfs_disk_key_to_cpu(&tmp_op_key, &extent_op->key); - op_key = &tmp_op_key; - } spin_lock(&head->lock); for (n = rb_first(&head->ref_tree); n; n = rb_next(n)) { @@ -1264,7 +1262,16 @@ again: while (node) { ref = rb_entry(node, struct prelim_ref, rbnode); node = rb_next(&ref->rbnode); - WARN_ON(ref->count < 0); + /* + * ref->count < 0 can happen here if there are delayed + * refs with a node->action of BTRFS_DROP_DELAYED_REF. + * prelim_ref_insert() relies on this when merging + * identical refs to keep the overall count correct. + * prelim_ref_insert() will merge only those refs + * which compare identically. Any refs having + * e.g. different offsets would not be merged, + * and would retain their original ref->count < 0. + */ if (roots && ref->count && ref->root_id && ref->parent == 0) { if (sc && sc->root_objectid && ref->root_id != sc->root_objectid) { @@ -1282,7 +1289,8 @@ again: ref->level == 0) { struct extent_buffer *eb; - eb = read_tree_block(fs_info, ref->parent, 0); + eb = read_tree_block(fs_info, ref->parent, 0, + ref->level, NULL); if (IS_ERR(eb)) { ret = PTR_ERR(eb); goto out; @@ -1510,6 +1518,7 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr) if (!node) break; bytenr = node->val; + shared.share_count = 0; cond_resched(); } |