From: Victor Nogueira <victor@mojatatu.com>
To: netdev@vger.kernel.org
Cc: jhs@mojatatu.com, xiyou.wangcong@gmail.com, jiri@resnulli.us,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, pctammela@mojatatu.com, kernel@mojatatu.com
Subject: [PATCH net 1/5] net: sched: cls_bpf: Undo tcf_bind_filter in case of an error
Date: Tue, 4 Jul 2023 12:14:52 -0300 [thread overview]
Message-ID: <20230704151456.52334-2-victor@mojatatu.com> (raw)
In-Reply-To: <20230704151456.52334-1-victor@mojatatu.com>
If cls_bpf_offload errors out, we must also undo tcf_bind_filter that
was done in cls_bpf_set_parms.
Fix that by calling tcf_unbind_filter in errout_parms.
Fixes: eadb41489fd2 ("net: cls_bpf: add support for marking filters as hardware-only")
Signed-off-by: Victor Nogueira <victor@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Pedro Tammela <pctammela@mojatatu.com>
---
net/sched/cls_bpf.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/sched/cls_bpf.c b/net/sched/cls_bpf.c
index 466c26df853a..4d9974b1b29d 100644
--- a/net/sched/cls_bpf.c
+++ b/net/sched/cls_bpf.c
@@ -409,7 +409,7 @@ static int cls_bpf_prog_from_efd(struct nlattr **tb, struct cls_bpf_prog *prog,
static int cls_bpf_set_parms(struct net *net, struct tcf_proto *tp,
struct cls_bpf_prog *prog, unsigned long base,
struct nlattr **tb, struct nlattr *est, u32 flags,
- struct netlink_ext_ack *extack)
+ bool *bound_to_filter, struct netlink_ext_ack *extack)
{
bool is_bpf, is_ebpf, have_exts = false;
u32 gen_flags = 0;
@@ -451,6 +451,7 @@ static int cls_bpf_set_parms(struct net *net, struct tcf_proto *tp,
if (tb[TCA_BPF_CLASSID]) {
prog->res.classid = nla_get_u32(tb[TCA_BPF_CLASSID]);
tcf_bind_filter(tp, &prog->res, base);
+ *bound_to_filter = true;
}
return 0;
@@ -464,6 +465,7 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
{
struct cls_bpf_head *head = rtnl_dereference(tp->root);
struct cls_bpf_prog *oldprog = *arg;
+ bool bound_to_filter = false;
struct nlattr *tb[TCA_BPF_MAX + 1];
struct cls_bpf_prog *prog;
int ret;
@@ -505,7 +507,7 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
prog->handle = handle;
ret = cls_bpf_set_parms(net, tp, prog, base, tb, tca[TCA_RATE], flags,
- extack);
+ &bound_to_filter, extack);
if (ret < 0)
goto errout_idr;
@@ -530,6 +532,8 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
return 0;
errout_parms:
+ if (bound_to_filter)
+ tcf_unbind_filter(tp, &prog->res);
cls_bpf_free_parms(prog);
errout_idr:
if (!oldprog)
--
2.25.1
next prev parent reply other threads:[~2023-07-04 15:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-04 15:14 [PATCH net 0/5] net: sched: Undo tcf_bind_filter in case of errors in set callbacks Victor Nogueira
2023-07-04 15:14 ` Victor Nogueira [this message]
2023-07-04 20:48 ` [PATCH net 1/5] net: sched: cls_bpf: Undo tcf_bind_filter in case of an error Simon Horman
2023-07-04 20:55 ` Jamal Hadi Salim
2023-07-04 21:19 ` Simon Horman
2023-07-04 21:42 ` Jamal Hadi Salim
2023-07-05 7:45 ` Simon Horman
2023-07-04 15:14 ` [PATCH net 2/5] net: sched: cls_matchall: Undo tcf_bind_filter in case of failure after mall_set_parms Victor Nogueira
2023-07-04 15:14 ` [PATCH net 3/5] net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode Victor Nogueira
2023-07-04 15:14 ` [PATCH net 4/5] net: sched: cls_u32: Undo refcount decrement in case update failed Victor Nogueira
2023-07-04 15:14 ` [PATCH net 5/5] net: sched: cls_flower: Undo tcf_bind_filter if fl_set_key fails Victor Nogueira
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