From 4e8c861550105f7aaa85a19b2571151cb8eceaa2 Mon Sep 17 00:00:00 2001
From: Jamal Hadi Salim <jhs@mojatatu.com>
Date: Tue, 10 May 2016 16:49:31 -0400
Subject: [PATCH] net sched: ife action fix late binding
The process below was broken and is fixed with this patch.
//add an ife action and give it an instance id of 1
sudo tc actions add action ife encode \
type 0xDEAD allow mark dst 02:15:15:15:15:15 index 1
//create a filter which binds to ife action id 1
sudo tc filter add dev $DEV parent ffff: protocol ip prio 1 u32\
match ip dst 17.0.0.1/32 flowid 1:11 action ife index 1
Message before fix was:
RTNETLINK answers: Invalid argument
We have an error talking to the kernel
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/sched/act_ife.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/net/sched/act_ife.c b/net/sched/act_ife.c
index c589a9ba506a..343d011aa818 100644
--- a/net/sched/act_ife.c
+++ b/net/sched/act_ife.c
@@ -423,7 +423,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
u16 ife_type = 0;
u8 *daddr = NULL;
u8 *saddr = NULL;
- int ret = 0;
+ int ret = 0, exists = 0;
int err;
err = nla_parse_nested(tb, TCA_IFE_MAX, nla, ife_policy);
@@ -435,25 +435,29 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
parm = nla_data(tb[TCA_IFE_PARMS]);
+ exists = tcf_hash_check(tn, parm->index, a, bind);
+ if (exists && bind)
+ return 0;
+
if (parm->flags & IFE_ENCODE) {
/* Until we get issued the ethertype, we cant have
* a default..
**/
if (!tb[TCA_IFE_TYPE]) {
+ if (exists)
+ tcf_hash_release(a, bind);
pr_info("You MUST pass etherype for encoding\n");
return -EINVAL;
}
}
- if (!tcf_hash_check(tn, parm->index, a, bind)) {
+ if (!exists) {
ret = tcf_hash_create(tn, parm->index, est, a, sizeof(*ife),
bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;
} else {
- if (bind) /* dont override defaults */
- return 0;
tcf_hash_release(a, bind);
if (!ovr)
return -EEXIST;
@@ -495,6 +499,8 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
NULL);
if (err) {
metadata_parse_err:
+ if (exists)
+ tcf_hash_release(a, bind);
if (ret == ACT_P_CREATED)
_tcf_ife_cleanup(a, bind);
--
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