From: Jamal Hadi Salim Date: Tue, 10 May 2016 20:49:30 +0000 (-0400) Subject: net sched: skbedit action fix late binding X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5e1567aeb7fe0ca478bfad5d17791cce3ddd45c9;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git net sched: skbedit action fix late binding The process below was broken and is fixed with this patch. //add a skbedit action and give it an instance id of 1 sudo tc actions add action skbedit mark 10 index 1 //create a filter which binds to skbedit 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 1:10 action skbedit index 1 Message before fix was: RTNETLINK answers: Invalid argument We have an error talking to the kernel Signed-off-by: Jamal Hadi Salim Reviewed-by: Cong Wang Signed-off-by: David S. Miller --- diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c index cfcdbdc00c9b..69da5a8f0034 100644 --- a/net/sched/act_skbedit.c +++ b/net/sched/act_skbedit.c @@ -69,7 +69,7 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla, struct tcf_skbedit *d; u32 flags = 0, *priority = NULL, *mark = NULL; u16 *queue_mapping = NULL; - int ret = 0, err; + int ret = 0, err, exists = 0; if (nla == NULL) return -EINVAL; @@ -96,12 +96,18 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla, mark = nla_data(tb[TCA_SKBEDIT_MARK]); } - if (!flags) - return -EINVAL; - parm = nla_data(tb[TCA_SKBEDIT_PARMS]); - if (!tcf_hash_check(tn, parm->index, a, bind)) { + exists = tcf_hash_check(tn, parm->index, a, bind); + if (exists && bind) + return 0; + + if (!flags) { + tcf_hash_release(a, bind); + return -EINVAL; + } + + if (!exists) { ret = tcf_hash_create(tn, parm->index, est, a, sizeof(*d), bind, false); if (ret) @@ -111,8 +117,6 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla, ret = ACT_P_CREATED; } else { d = to_skbedit(a); - if (bind) - return 0; tcf_hash_release(a, bind); if (!ovr) return -EEXIST;