net: sched: flower: only return error from hw offload if skip_sw

Recently introduced tc_setup_flow_action() can fail when parsing tcf_exts
on some unsupported action commands. However, this should not affect the
case when user did not explicitly request hw offload by setting skip_sw
flag. Modify tc_setup_flow_action() callers to only propagate the error if
skip_sw flag is set for filter that is being offloaded, and set extack
error message in that case.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Fixes: 3a7b68617de7 ("cls_api: add translator to flow_action representation")
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 32fa3e2..640f83e 100644 (file)
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -396,7 +396,11 @@ static int fl_hw_replace_filter(struct tcf_proto *tp,
        err = tc_setup_flow_action(&cls_flower.rule->action, &f->exts);
        if (err) {
                kfree(cls_flower.rule);
-               return err;
+               if (skip_sw) {
+                       NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
+                       return err;
+               }
+               return 0;
        }
 
        err = tc_setup_cb_call(block, TC_SETUP_CLSFLOWER, &cls_flower, skip_sw);
@@ -1503,7 +1507,11 @@ static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
                                                   &f->exts);
                        if (err) {
                                kfree(cls_flower.rule);
-                               return err;
+                               if (tc_skip_sw(f->flags)) {
+                                       NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
+                                       return err;
+                               }
+                               continue;
                        }
 
                        cls_flower.classid = f->res.classid;