net/sched: act_pedit: Add extack message for offload failure

For better error reporting to user space, add an extack message when
pedit action offload fails.

Currently, the failure cannot be triggered, but add a message in case
the action is extended in the future to support more than set/add
commands.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index dc12d50..e01ef7f 100644 (file)
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -504,6 +504,7 @@ static int tcf_pedit_offload_act_setup(struct tc_action *act, void *entry_data,
                                entry->id = FLOW_ACTION_ADD;
                                break;
                        default:
+                               NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
                                return -EOPNOTSUPP;
                        }
                        entry->mangle.htype = tcf_pedit_htype(act, k);