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netdevsim: tc: allow to test nf_tables offload control plane code

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The actual 'offload' is phony, all commands are ignored: this is only
useful to test control plane code.

Tag the existing callback to permit error injection to test rollback/abort
code in nf_tables.  This is also for fuzzers - the fault injection
framework allows probabilistic error insertion.

Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://patch.msgid.link/20260612092209.11966-2-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Westphal 2026-06-12 11:22:08 +02:00 committed by Jakub Kicinski
parent 5184fd3421
commit 07ca2ab4ce
2 changed files with 19 additions and 7 deletions
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6
drivers/net/netdevsim/bpf.c
View File

@ -123,12 +123,6 @@ int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
struct netdevsim *ns = cb_priv;
struct bpf_prog *oldprog;
if (type != TC_SETUP_CLSBPF) {
NSIM_EA(cls_bpf->common.extack,
"only offload of BPF classifiers supported");
return -EOPNOTSUPP;
}
if (!tc_cls_can_offload_and_chain0(ns->netdev, &cls_bpf->common))
return -EOPNOTSUPP;

20
drivers/net/netdevsim/tc.c
View File

@ -9,7 +9,22 @@
static int
nsim_setup_tc_block_cb(enum tc_setup_type type, void *type_data, void *cb_priv)
{
return nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
struct flow_cls_common_offload *common = type_data;
int err = 0;
switch (type) {
case TC_SETUP_CLSBPF:
err = nsim_bpf_setup_tc_block_cb(type, type_data, cb_priv);
break;
case TC_SETUP_CLSFLOWER:
break;
default:
NSIM_EA(common->extack, "offload type not supported");
err = -EOPNOTSUPP;
break;
}
return err;
}
static void nsim_taprio_stats(struct tc_taprio_qopt_stats *stats)
@ -73,7 +88,10 @@ nsim_setup_tc(struct net_device *dev, enum tc_setup_type type, void *type_data)
&nsim_block_cb_list,
nsim_setup_tc_block_cb,
ns, ns, true);
case TC_SETUP_FT:
return 0;
default:
return -EOPNOTSUPP;
}
}
ALLOW_ERROR_INJECTION(nsim_setup_tc, ERRNO);