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

[Qu Wenruo]

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

Signed-off-by: Qu Wenruo <w...@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