diff options
| -rw-r--r-- | fs/btrfs/btrfs_inode.h | 3 | ||||
| -rw-r--r-- | fs/btrfs/delayed-inode.c | 103 | ||||
| -rw-r--r-- | fs/btrfs/delayed-inode.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 55 |
4 files changed, 157 insertions, 6 deletions
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h index ac0b39db27d1..661b0ac90e8f 100644 --- a/fs/btrfs/btrfs_inode.h +++ b/fs/btrfs/btrfs_inode.h @@ -135,6 +135,9 @@ struct btrfs_inode { */ u64 index_cnt; + /* Cache the directory index number to speed the dir/file remove */ + u64 dir_index; + /* the fsync log has some corner cases that mean we have to check * directories to see if any unlinks have been done before * the directory was logged. See tree-log.c for all the diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c index 222ca8cdc53a..451b00c86f6c 100644 --- a/fs/btrfs/delayed-inode.c +++ b/fs/btrfs/delayed-inode.c @@ -1015,6 +1015,18 @@ static void btrfs_release_delayed_inode(struct btrfs_delayed_node *delayed_node) } } +static void btrfs_release_delayed_iref(struct btrfs_delayed_node *delayed_node) +{ + struct btrfs_delayed_root *delayed_root; + + ASSERT(delayed_node->root); + clear_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); + delayed_node->count--; + + delayed_root = delayed_node->root->fs_info->delayed_root; + finish_one_item(delayed_root); +} + static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct btrfs_path *path, @@ -1023,13 +1035,19 @@ static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, struct btrfs_key key; struct btrfs_inode_item *inode_item; struct extent_buffer *leaf; + int mod; int ret; key.objectid = node->inode_id; btrfs_set_key_type(&key, BTRFS_INODE_ITEM_KEY); key.offset = 0; - ret = btrfs_lookup_inode(trans, root, path, &key, 1); + if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) + mod = -1; + else + mod = 1; + + ret = btrfs_lookup_inode(trans, root, path, &key, mod); if (ret > 0) { btrfs_release_path(path); return -ENOENT; @@ -1037,19 +1055,58 @@ static int __btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, return ret; } - btrfs_unlock_up_safe(path, 1); leaf = path->nodes[0]; inode_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_inode_item); write_extent_buffer(leaf, &node->inode_item, (unsigned long)inode_item, sizeof(struct btrfs_inode_item)); btrfs_mark_buffer_dirty(leaf); - btrfs_release_path(path); + if (!test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &node->flags)) + goto no_iref; + + path->slots[0]++; + if (path->slots[0] >= btrfs_header_nritems(leaf)) + goto search; +again: + btrfs_item_key_to_cpu(leaf, &key, path->slots[0]); + if (key.objectid != node->inode_id) + goto out; + + if (key.type != BTRFS_INODE_REF_KEY && + key.type != BTRFS_INODE_EXTREF_KEY) + goto out; + + /* + * Delayed iref deletion is for the inode who has only one link, + * so there is only one iref. The case that several irefs are + * in the same item doesn't exist. + */ + btrfs_del_item(trans, root, path); +out: + btrfs_release_delayed_iref(node); +no_iref: + btrfs_release_path(path); +err_out: btrfs_delayed_inode_release_metadata(root, node); btrfs_release_delayed_inode(node); - return 0; + return ret; + +search: + btrfs_release_path(path); + + btrfs_set_key_type(&key, BTRFS_INODE_EXTREF_KEY); + key.offset = -1; + ret = btrfs_search_slot(trans, root, &key, path, -1, 1); + if (ret < 0) + goto err_out; + ASSERT(ret); + + ret = 0; + leaf = path->nodes[0]; + path->slots[0]--; + goto again; } static inline int btrfs_update_delayed_inode(struct btrfs_trans_handle *trans, @@ -1793,6 +1850,41 @@ release_node: return ret; } +int btrfs_delayed_delete_inode_ref(struct inode *inode) +{ + struct btrfs_delayed_node *delayed_node; + + delayed_node = btrfs_get_or_create_delayed_node(inode); + if (IS_ERR(delayed_node)) + return PTR_ERR(delayed_node); + + /* + * We don't reserve space for inode ref deletion is because: + * - We ONLY do async inode ref deletion for the inode who has only + * one link(i_nlink == 1), it means there is only one inode ref. + * And in most case, the inode ref and the inode item are in the + * same leaf, and we will deal with them at the same time. + * Since we are sure we will reserve the space for the inode item, + * it is unnecessary to reserve space for inode ref deletion. + * - If the inode ref and the inode item are not in the same leaf, + * We also needn't worry about enospc problem, because we reserve + * much more space for the inode update than it needs. + * - At the worst, we can steal some space from the global reservation. + * It is very rare. + */ + mutex_lock(&delayed_node->mutex); + if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) + goto release_node; + + set_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags); + delayed_node->count++; + atomic_inc(&BTRFS_I(inode)->root->fs_info->delayed_root->items); +release_node: + mutex_unlock(&delayed_node->mutex); + btrfs_release_delayed_node(delayed_node); + return 0; +} + static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) { struct btrfs_root *root = delayed_node->root; @@ -1815,6 +1907,9 @@ static void __btrfs_kill_delayed_node(struct btrfs_delayed_node *delayed_node) btrfs_release_delayed_item(prev_item); } + if (test_bit(BTRFS_DELAYED_NODE_DEL_IREF, &delayed_node->flags)) + btrfs_release_delayed_iref(delayed_node); + if (test_bit(BTRFS_DELAYED_NODE_INODE_DIRTY, &delayed_node->flags)) { btrfs_delayed_inode_release_metadata(root, delayed_node); btrfs_release_delayed_inode(delayed_node); diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h index a6a13f7e014d..f70119f25421 100644 --- a/fs/btrfs/delayed-inode.h +++ b/fs/btrfs/delayed-inode.h @@ -50,6 +50,7 @@ struct btrfs_delayed_root { #define BTRFS_DELAYED_NODE_IN_LIST 0 #define BTRFS_DELAYED_NODE_INODE_DIRTY 1 +#define BTRFS_DELAYED_NODE_DEL_IREF 2 struct btrfs_delayed_node { u64 inode_id; @@ -127,6 +128,7 @@ int btrfs_commit_inode_delayed_inode(struct inode *inode); int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root, struct inode *inode); int btrfs_fill_inode(struct inode *inode, u32 *rdev); +int btrfs_delayed_delete_inode_ref(struct inode *inode); /* Used for drop dead root */ void btrfs_kill_all_delayed_nodes(struct btrfs_root *root); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 06bcf5b53cb0..9eaa1c8ed385 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -3309,6 +3309,7 @@ static void btrfs_read_locked_inode(struct inode *inode) struct btrfs_timespec *tspec; struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_key location; + unsigned long ptr; int maybe_acls; u32 rdev; int ret; @@ -3332,7 +3333,7 @@ static void btrfs_read_locked_inode(struct inode *inode) leaf = path->nodes[0]; if (filled) - goto cache_acl; + goto cache_index; inode_item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_inode_item); @@ -3375,6 +3376,30 @@ static void btrfs_read_locked_inode(struct inode *inode) BTRFS_I(inode)->index_cnt = (u64)-1; BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item); + +cache_index: + path->slots[0]++; + if (inode->i_nlink != 1 || + path->slots[0] >= btrfs_header_nritems(leaf)) + goto cache_acl; + + btrfs_item_key_to_cpu(leaf, &location, path->slots[0]); + if (location.objectid != btrfs_ino(inode)) + goto cache_acl; + + ptr = btrfs_item_ptr_offset(leaf, path->slots[0]); + if (location.type == BTRFS_INODE_REF_KEY) { + struct btrfs_inode_ref *ref; + + ref = (struct btrfs_inode_ref *)ptr; + BTRFS_I(inode)->dir_index = btrfs_inode_ref_index(leaf, ref); + } else if (location.type == BTRFS_INODE_EXTREF_KEY) { + struct btrfs_inode_extref *extref; + + extref = (struct btrfs_inode_extref *)ptr; + BTRFS_I(inode)->dir_index = btrfs_inode_extref_index(leaf, + extref); + } cache_acl: /* * try to precache a NULL acl entry for files that don't have @@ -3587,6 +3612,24 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, goto err; btrfs_release_path(path); + /* + * If we don't have dir index, we have to get it by looking up + * the inode ref, since we get the inode ref, remove it directly, + * it is unnecessary to do delayed deletion. + * + * But if we have dir index, needn't search inode ref to get it. + * Since the inode ref is close to the inode item, it is better + * that we delay to delete it, and just do this deletion when + * we update the inode item. + */ + if (BTRFS_I(inode)->dir_index) { + ret = btrfs_delayed_delete_inode_ref(inode); + if (!ret) { + index = BTRFS_I(inode)->dir_index; + goto skip_backref; + } + } + ret = btrfs_del_inode_ref(trans, root, name, name_len, ino, dir_ino, &index); if (ret) { @@ -3596,7 +3639,7 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans, btrfs_abort_transaction(trans, root, ret); goto err; } - +skip_backref: ret = btrfs_delete_delayed_dir_index(trans, root, dir, index); if (ret) { btrfs_abort_transaction(trans, root, ret); @@ -5465,6 +5508,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, * number */ BTRFS_I(inode)->index_cnt = 2; + BTRFS_I(inode)->dir_index = *index; BTRFS_I(inode)->root = root; BTRFS_I(inode)->generation = trans->transid; inode->i_generation = BTRFS_I(inode)->generation; @@ -5809,6 +5853,8 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir, goto fail; } + /* There are several dir indexes for this inode, clear the cache. */ + BTRFS_I(inode)->dir_index = 0ULL; inc_nlink(inode); inode_inc_iversion(inode); inode->i_ctime = CURRENT_TIME; @@ -7861,6 +7907,7 @@ struct inode *btrfs_alloc_inode(struct super_block *sb) ei->flags = 0; ei->csum_bytes = 0; ei->index_cnt = (u64)-1; + ei->dir_index = 0; ei->last_unlink_trans = 0; ei->last_log_commit = 0; @@ -8148,6 +8195,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, if (ret) goto out_fail; + BTRFS_I(old_inode)->dir_index = 0ULL; if (unlikely(old_ino == BTRFS_FIRST_FREE_OBJECTID)) { /* force full log commit if subvolume involved. */ root->fs_info->last_trans_log_full_commit = trans->transid; @@ -8236,6 +8284,9 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry, goto out_fail; } + if (old_inode->i_nlink == 1) + BTRFS_I(old_inode)->dir_index = index; + if (old_ino != BTRFS_FIRST_FREE_OBJECTID) { struct dentry *parent = new_dentry->d_parent; btrfs_log_new_name(trans, old_inode, old_dir, parent); |