[PATCH net-next v4 4/8] net: sched: cls_bpf: plumb extack support in filter for hardware offload

[Jakub Kicinski]

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

Pass the extack pointer obtained in the `->change()` filter operation to
cls_bpf_offload() and then to cls_bpf_offload_cmd(). This makes it
possible to use this extack pointer in drivers offloading BPF programs
in a future patch.

Signed-off-by: Quentin Monnet <quentin.mon...@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 net/sched/cls_bpf.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index fc024fc3ec2f..44c2f9034e07 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -147,7 +147,8 @@ static bool cls_bpf_is_ebpf(const struct cls_bpf_prog *prog)
 }
 
 static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct cls_bpf_prog *prog,
-                              struct cls_bpf_prog *oldprog)
+                              struct cls_bpf_prog *oldprog,
+                              struct netlink_ext_ack *extack)
 {
        struct tcf_block *block = tp->chain->block;
        struct tc_cls_bpf_offload cls_bpf = {};
@@ -173,7 +174,7 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct 
cls_bpf_prog *prog,
        err = tc_setup_cb_call(block, NULL, TC_SETUP_CLSBPF, &cls_bpf, skip_sw);
        if (prog) {
                if (err < 0) {
-                       cls_bpf_offload_cmd(tp, oldprog, prog);
+                       cls_bpf_offload_cmd(tp, oldprog, prog, extack);
                        return err;
                } else if (err > 0) {
                        tcf_block_offload_inc(block, &prog->gen_flags);
@@ -187,7 +188,8 @@ static int cls_bpf_offload_cmd(struct tcf_proto *tp, struct 
cls_bpf_prog *prog,
 }
 
 static int cls_bpf_offload(struct tcf_proto *tp, struct cls_bpf_prog *prog,
-                          struct cls_bpf_prog *oldprog)
+                          struct cls_bpf_prog *oldprog,
+                          struct netlink_ext_ack *extack)
 {
        if (prog && oldprog && prog->gen_flags != oldprog->gen_flags)
                return -EINVAL;
@@ -199,7 +201,7 @@ static int cls_bpf_offload(struct tcf_proto *tp, struct 
cls_bpf_prog *prog,
        if (!prog && !oldprog)
                return 0;
 
-       return cls_bpf_offload_cmd(tp, prog, oldprog);
+       return cls_bpf_offload_cmd(tp, prog, oldprog, extack);
 }
 
 static void cls_bpf_stop_offload(struct tcf_proto *tp,
@@ -207,7 +209,7 @@ static void cls_bpf_stop_offload(struct tcf_proto *tp,
 {
        int err;
 
-       err = cls_bpf_offload_cmd(tp, NULL, prog);
+       err = cls_bpf_offload_cmd(tp, NULL, prog, NULL);
        if (err)
                pr_err("Stopping hardware offload failed: %d\n", err);
 }
@@ -507,7 +509,7 @@ static int cls_bpf_change(struct net *net, struct sk_buff 
*in_skb,
        if (ret < 0)
                goto errout_idr;
 
-       ret = cls_bpf_offload(tp, prog, oldprog);
+       ret = cls_bpf_offload(tp, prog, oldprog, extack);
        if (ret)
                goto errout_parms;
 
-- 
2.15.1