diff options
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 47 |
1 files changed, 17 insertions, 30 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 6dcdb2ec9211..80e8472d618b 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -148,8 +148,7 @@ int __init btrfs_prelim_ref_init(void) void btrfs_prelim_ref_exit(void) { - if (btrfs_prelim_ref_cache) - kmem_cache_destroy(btrfs_prelim_ref_cache); + kmem_cache_destroy(btrfs_prelim_ref_cache); } /* @@ -355,7 +354,7 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info, index = srcu_read_lock(&fs_info->subvol_srcu); - root = btrfs_read_fs_root_no_name(fs_info, &root_key); + root = btrfs_get_fs_root(fs_info, &root_key, false); if (IS_ERR(root)) { srcu_read_unlock(&fs_info->subvol_srcu, index); ret = PTR_ERR(root); @@ -520,13 +519,10 @@ static inline int ref_for_same_block(struct __prelim_ref *ref1, static int __add_missing_keys(struct btrfs_fs_info *fs_info, struct list_head *head) { - struct list_head *pos; + struct __prelim_ref *ref; struct extent_buffer *eb; - list_for_each(pos, head) { - struct __prelim_ref *ref; - ref = list_entry(pos, struct __prelim_ref, list); - + list_for_each_entry(ref, head, list) { if (ref->parent) continue; if (ref->key_for_search.type) @@ -563,31 +559,20 @@ static int __add_missing_keys(struct btrfs_fs_info *fs_info, */ static void __merge_refs(struct list_head *head, int mode) { - struct list_head *pos1; + struct __prelim_ref *pos1; - list_for_each(pos1, head) { - struct list_head *n2; - struct list_head *pos2; - struct __prelim_ref *ref1; + list_for_each_entry(pos1, head, list) { + struct __prelim_ref *pos2 = pos1, *tmp; - ref1 = list_entry(pos1, struct __prelim_ref, list); - - for (pos2 = pos1->next, n2 = pos2->next; pos2 != head; - pos2 = n2, n2 = pos2->next) { - struct __prelim_ref *ref2; - struct __prelim_ref *xchg; + list_for_each_entry_safe_continue(pos2, tmp, head, list) { + struct __prelim_ref *ref1 = pos1, *ref2 = pos2; struct extent_inode_elem *eie; - ref2 = list_entry(pos2, struct __prelim_ref, list); - if (!ref_for_same_block(ref1, ref2)) continue; if (mode == 1) { - if (!ref1->parent && ref2->parent) { - xchg = ref1; - ref1 = ref2; - ref2 = xchg; - } + if (!ref1->parent && ref2->parent) + swap(ref1, ref2); } else { if (ref1->parent != ref2->parent) continue; @@ -1417,7 +1402,8 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, read_extent_buffer(eb, dest + bytes_left, name_off, name_len); if (eb != eb_in) { - btrfs_tree_read_unlock_blocking(eb); + if (!path->skip_locking) + btrfs_tree_read_unlock_blocking(eb); free_extent_buffer(eb); } ret = btrfs_find_item(fs_root, path, parent, 0, @@ -1437,9 +1423,10 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path, eb = path->nodes[0]; /* make sure we can use eb after releasing the path */ if (eb != eb_in) { - atomic_inc(&eb->refs); - btrfs_tree_read_lock(eb); - btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); + if (!path->skip_locking) + btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK); + path->nodes[0] = NULL; + path->locks[0] = 0; } btrfs_release_path(path); iref = btrfs_item_ptr(eb, slot, struct btrfs_inode_ref); |