[PATCH 3/3] btrfs: qgroup: Remove deprecated feature support in btrfs_qgorup_inhert()

[Qu Wenruo <wqu@suse.com>]

Since btrfs_validate_inherit() will not allow features like copy
rfer/excl and limit set, remove these dead code.

Signed-off-by: Qu Wenruo <wqu@suse.com>
---
 fs/btrfs/qgroup.c | 57 +----------------------------------------------
 1 file changed, 1 insertion(+), 56 deletions(-)

diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 53daf73b0de9..b57577f45ff3 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2301,8 +2301,7 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
 
 	if (inherit) {
 		i_qgroups = (u64 *)(inherit + 1);
-		nums = inherit->num_qgroups + 2 * inherit->num_ref_copies +
-		       2 * inherit->num_excl_copies;
+		nums = inherit->num_qgroups;
 		for (i = 0; i < nums; ++i) {
 			srcgroup = find_qgroup_rb(fs_info, *i_qgroups);
 
@@ -2354,23 +2353,6 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
 		goto unlock;
 	}
 
-	if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) {
-		dstgroup->lim_flags = inherit->lim.flags;
-		dstgroup->max_rfer = inherit->lim.max_rfer;
-		dstgroup->max_excl = inherit->lim.max_excl;
-		dstgroup->rsv_rfer = inherit->lim.rsv_rfer;
-		dstgroup->rsv_excl = inherit->lim.rsv_excl;
-
-		ret = update_qgroup_limit_item(trans, dstgroup);
-		if (ret) {
-			fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
-			btrfs_info(fs_info,
-				   "unable to update quota limit for %llu",
-				   dstgroup->qgroupid);
-			goto unlock;
-		}
-	}
-
 	if (srcid) {
 		srcgroup = find_qgroup_rb(fs_info, srcid);
 		if (!srcgroup)
@@ -2413,43 +2395,6 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
 		++i_qgroups;
 	}
 
-	for (i = 0; i <  inherit->num_ref_copies; ++i, i_qgroups += 2) {
-		struct btrfs_qgroup *src;
-		struct btrfs_qgroup *dst;
-
-		if (!i_qgroups[0] || !i_qgroups[1])
-			continue;
-
-		src = find_qgroup_rb(fs_info, i_qgroups[0]);
-		dst = find_qgroup_rb(fs_info, i_qgroups[1]);
-
-		if (!src || !dst) {
-			ret = -EINVAL;
-			goto unlock;
-		}
-
-		dst->rfer = src->rfer - level_size;
-		dst->rfer_cmpr = src->rfer_cmpr - level_size;
-	}
-	for (i = 0; i <  inherit->num_excl_copies; ++i, i_qgroups += 2) {
-		struct btrfs_qgroup *src;
-		struct btrfs_qgroup *dst;
-
-		if (!i_qgroups[0] || !i_qgroups[1])
-			continue;
-
-		src = find_qgroup_rb(fs_info, i_qgroups[0]);
-		dst = find_qgroup_rb(fs_info, i_qgroups[1]);
-
-		if (!src || !dst) {
-			ret = -EINVAL;
-			goto unlock;
-		}
-
-		dst->excl = src->excl + level_size;
-		dst->excl_cmpr = src->excl_cmpr + level_size;
-	}
-
 unlock:
 	spin_unlock(&fs_info->qgroup_lock);
 out:
-- 
2.18.0