diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/delayed-ref.c | 16 | ||||
| -rw-r--r-- | fs/btrfs/delayed-ref.h | 19 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 7 |
3 files changed, 36 insertions, 6 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 21a7577..da7419e 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -529,8 +529,8 @@ static noinline void add_delayed_tree_ref(struct btrfs_fs_info *fs_info, ref->is_head = 0; ref->in_tree = 1; - if (is_fstree(ref_root)) - seq = btrfs_inc_tree_mod_seq(fs_info); + if (need_ref_seq(for_cow, ref_root)) + seq = btrfs_get_tree_mod_seq(fs_info, &trans->delayed_ref_elem); ref->seq = seq; full_ref = btrfs_delayed_node_to_tree_ref(ref); @@ -588,8 +588,8 @@ static noinline void add_delayed_data_ref(struct btrfs_fs_info *fs_info, ref->is_head = 0; ref->in_tree = 1; - if (is_fstree(ref_root)) - seq = btrfs_inc_tree_mod_seq(fs_info); + if (need_ref_seq(for_cow, ref_root)) + seq = btrfs_get_tree_mod_seq(fs_info, &trans->delayed_ref_elem); ref->seq = seq; full_ref = btrfs_delayed_node_to_data_ref(ref); @@ -662,10 +662,12 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info, add_delayed_tree_ref(fs_info, trans, &ref->node, bytenr, num_bytes, parent, ref_root, level, action, for_cow); - if (!is_fstree(ref_root) && + if (!need_ref_seq(for_cow, ref_root) && waitqueue_active(&fs_info->tree_mod_seq_wait)) wake_up(&fs_info->tree_mod_seq_wait); spin_unlock(&delayed_refs->lock); + if (need_ref_seq(for_cow, ref_root)) + btrfs_qgroup_record_ref(trans, &ref->node, extent_op); return 0; } @@ -711,10 +713,12 @@ int btrfs_add_delayed_data_ref(struct btrfs_fs_info *fs_info, add_delayed_data_ref(fs_info, trans, &ref->node, bytenr, num_bytes, parent, ref_root, owner, offset, action, for_cow); - if (!is_fstree(ref_root) && + if (!need_ref_seq(for_cow, ref_root) && waitqueue_active(&fs_info->tree_mod_seq_wait)) wake_up(&fs_info->tree_mod_seq_wait); spin_unlock(&delayed_refs->lock); + if (need_ref_seq(for_cow, ref_root)) + btrfs_qgroup_record_ref(trans, &ref->node, extent_op); return 0; } diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index 2b5cb27..0d7c90c 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -180,6 +180,25 @@ int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info, u64 seq); /* + * delayed refs with a ref_seq > 0 must be held back during backref walking. + * this only applies to items in one of the fs-trees. for_cow items never need + * to be held back, so they won't get a ref_seq number. + */ +static inline int need_ref_seq(int for_cow, u64 rootid) +{ + if (for_cow) + return 0; + + if (rootid == BTRFS_FS_TREE_OBJECTID) + return 1; + + if ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID) + return 1; + + return 0; +} + +/* * a node might live in a head or a regular ref, this lets you * test for the proper type to use. */ diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index d20d2e2..21c768c 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -795,6 +795,13 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans, ret = btrfs_run_dev_stats(trans, root->fs_info); BUG_ON(ret); + ret = btrfs_run_qgroups(trans, root->fs_info); + BUG_ON(ret); + + /* run_qgroups might have added some more refs */ + ret = btrfs_run_delayed_refs(trans, root, (unsigned long)-1); + BUG_ON(ret); + while (!list_empty(&fs_info->dirty_cowonly_roots)) { next = fs_info->dirty_cowonly_roots.next; list_del_init(next); |