diff options
| -rw-r--r-- | fs/btrfs/qgroup.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 58a8b6930960..87672d03c8ac 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1076,21 +1076,30 @@ static void report_reserved_underflow(struct btrfs_fs_info *fs_info, #endif qgroup->reserved = 0; } + /* - * The easy accounting, if we are adding/removing the only ref for an extent - * then this qgroup and all of the parent qgroups get their reference and - * exclusive counts adjusted. + * The easy accounting, we're updating qgroup relationship whose child qgroup + * only has exclusive extents. + * + * In this case, all exclsuive extents will also be exlusive for parent, so + * excl/rfer just get added/removed. + * + * So is qgroup reservation space, which should also be added/removed to + * parent. + * Or when child tries to release reservation space, parent will underflow its + * reservation (for relationship adding case). * * Caller should hold fs_info->qgroup_lock. */ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, struct ulist *tmp, u64 ref_root, - u64 num_bytes, int sign) + struct btrfs_qgroup *src, int sign) { struct btrfs_qgroup *qgroup; struct btrfs_qgroup_list *glist; struct ulist_node *unode; struct ulist_iterator uiter; + u64 num_bytes = src->excl; int ret = 0; qgroup = find_qgroup_rb(fs_info, ref_root); @@ -1103,13 +1112,11 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, WARN_ON(sign < 0 && qgroup->excl < num_bytes); qgroup->excl += sign * num_bytes; qgroup->excl_cmpr += sign * num_bytes; - if (sign > 0) { - trace_qgroup_update_reserve(fs_info, qgroup, -(s64)num_bytes); - if (qgroup->reserved < num_bytes) - report_reserved_underflow(fs_info, qgroup, num_bytes); - else - qgroup->reserved -= num_bytes; - } + + if (sign > 0) + qgroup_rsv_add_by_qgroup(qgroup, src); + else + qgroup_rsv_release_by_qgroup(qgroup, src); qgroup_dirty(fs_info, qgroup); @@ -1129,15 +1136,10 @@ static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, qgroup->rfer_cmpr += sign * num_bytes; WARN_ON(sign < 0 && qgroup->excl < num_bytes); qgroup->excl += sign * num_bytes; - if (sign > 0) { - trace_qgroup_update_reserve(fs_info, qgroup, - -(s64)num_bytes); - if (qgroup->reserved < num_bytes) - report_reserved_underflow(fs_info, qgroup, - num_bytes); - else - qgroup->reserved -= num_bytes; - } + if (sign > 0) + qgroup_rsv_add_by_qgroup(qgroup, src); + else + qgroup_rsv_release_by_qgroup(qgroup, src); qgroup->excl_cmpr += sign * num_bytes; qgroup_dirty(fs_info, qgroup); @@ -1180,7 +1182,7 @@ static int quick_update_accounting(struct btrfs_fs_info *fs_info, if (qgroup->excl == qgroup->rfer) { ret = 0; err = __qgroup_excl_accounting(fs_info, tmp, dst, - qgroup->excl, sign); + qgroup, sign); if (err < 0) { ret = err; goto out; |