diff options
Diffstat (limited to 'fs/btrfs/qgroup.c')
| -rw-r--r-- | fs/btrfs/qgroup.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c index 26f9da26e17e..81773176d01f 100644 --- a/fs/btrfs/qgroup.c +++ b/fs/btrfs/qgroup.c @@ -1806,6 +1806,64 @@ static int qgroup_calc_new_refcnt(struct btrfs_fs_info *fs_info, return 0; } +#define UPDATE_NEW 0 +#define UPDATE_OLD 1 +/* + * Walk all of the roots that points to the bytenr and adjust their refcnts. + */ +static int qgroup_update_refcnt(struct btrfs_fs_info *fs_info, + struct ulist *roots, struct ulist *tmp, + struct ulist *qgroups, u64 seq, int update_old) +{ + struct ulist_node *unode; + struct ulist_iterator uiter; + struct ulist_node *tmp_unode; + struct ulist_iterator tmp_uiter; + struct btrfs_qgroup *qg; + int ret = 0; + + if (!roots) + return 0; + ULIST_ITER_INIT(&uiter); + while ((unode = ulist_next(roots, &uiter))) { + qg = find_qgroup_rb(fs_info, unode->val); + if (!qg) + continue; + + ulist_reinit(tmp); + ret = ulist_add(qgroups, qg->qgroupid, ptr_to_u64(qg), + GFP_ATOMIC); + if (ret < 0) + return ret; + ret = ulist_add(tmp, qg->qgroupid, ptr_to_u64(qg), GFP_ATOMIC); + if (ret < 0) + return ret; + ULIST_ITER_INIT(&tmp_uiter); + while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { + struct btrfs_qgroup_list *glist; + + qg = u64_to_ptr(tmp_unode->aux); + if (update_old) + btrfs_qgroup_update_old_refcnt(qg, seq, 1); + else + btrfs_qgroup_update_new_refcnt(qg, seq, 1); + list_for_each_entry(glist, &qg->groups, next_group) { + ret = ulist_add(qgroups, glist->group->qgroupid, + ptr_to_u64(glist->group), + GFP_ATOMIC); + if (ret < 0) + return ret; + ret = ulist_add(tmp, glist->group->qgroupid, + ptr_to_u64(glist->group), + GFP_ATOMIC); + if (ret < 0) + return ret; + } + } + } + return 0; +} + /* * This adjusts the counters for all referenced qgroups if need be. */ |