[PATCH bpf-next v2 04/11] net: sched: cls_matchall: propagate extack support for filter offload

[Jakub Kicinski]

From: Quentin Monnet <quentin.mon...@netronome.com>

Propagate the extack pointer from the `->change()` classifier operation
to the function used for filter replacement in cls_matchall, and feed it
to tc_cls_common_offload_init(). This makes it possible to use netlink
extack messages in the future at replacement time for this filter,
although it is not used at this point.

Signed-off-by: Quentin Monnet <quentin.mon...@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 net/sched/cls_matchall.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 24bec37e9747..fe6b673db5c6 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -85,14 +85,15 @@ static void mall_destroy_hw_filter(struct tcf_proto *tp,
 
 static int mall_replace_hw_filter(struct tcf_proto *tp,
                                  struct cls_mall_head *head,
-                                 unsigned long cookie)
+                                 unsigned long cookie,
+                                 struct netlink_ext_ack *extack)
 {
        struct tc_cls_matchall_offload cls_mall = {};
        struct tcf_block *block = tp->chain->block;
        bool skip_sw = tc_skip_sw(head->flags);
        int err;
 
-       tc_cls_common_offload_init(&cls_mall.common, tp, NULL);
+       tc_cls_common_offload_init(&cls_mall.common, tp, extack);
        cls_mall.command = TC_CLSMATCHALL_REPLACE;
        cls_mall.exts = &head->exts;
        cls_mall.cookie = cookie;
@@ -202,7 +203,8 @@ static int mall_change(struct net *net, struct sk_buff 
*in_skb,
                goto err_set_parms;
 
        if (!tc_skip_hw(new->flags)) {
-               err = mall_replace_hw_filter(tp, new, (unsigned long) new);
+               err = mall_replace_hw_filter(tp, new, (unsigned long)new,
+                                            extack);
                if (err)
                        goto err_replace_hw_filter;
        }
-- 
2.15.1