From 2f7ef2f8790f5bf53db4fc6b2310943139285827 Mon Sep 17 00:00:00 2001 From: Cong Wang Date: Fri, 25 Apr 2014 13:54:06 -0700 Subject: sched, cls: check if we could overwrite actions when changing a filter When actions are attached to a filter, they are a part of the filter itself, so when changing a filter we should allow to overwrite the actions inside as well. In my specific case, when I tried to _append_ a new action to an existing filter which already has an action, I got EEXIST since kernel refused to overwrite the existing one in kernel. This patch checks if we are changing the filter checking NLM_F_CREATE flag (Sigh, filters don't use NLM_F_REPLACE...) and then passes the boolean down to actions. This fixes the problem above. Cc: Jamal Hadi Salim Cc: David S. Miller Signed-off-by: Cong Wang Signed-off-by: Cong Wang Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/sched/cls_tcindex.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'net/sched/cls_tcindex.c') diff --git a/net/sched/cls_tcindex.c b/net/sched/cls_tcindex.c index eed8404443d8..d11d0a4fbe34 100644 --- a/net/sched/cls_tcindex.c +++ b/net/sched/cls_tcindex.c @@ -192,7 +192,7 @@ static int tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base, u32 handle, struct tcindex_data *p, struct tcindex_filter_result *r, struct nlattr **tb, - struct nlattr *est) + struct nlattr *est, bool ovr) { int err, balloc = 0; struct tcindex_filter_result new_filter_result, *old_r = r; @@ -202,7 +202,7 @@ tcindex_set_parms(struct net *net, struct tcf_proto *tp, unsigned long base, struct tcf_exts e; tcf_exts_init(&e, TCA_TCINDEX_ACT, TCA_TCINDEX_POLICE); - err = tcf_exts_validate(net, tp, tb, est, &e); + err = tcf_exts_validate(net, tp, tb, est, &e, ovr); if (err < 0) return err; @@ -331,7 +331,7 @@ errout: static int tcindex_change(struct net *net, struct sk_buff *in_skb, struct tcf_proto *tp, unsigned long base, u32 handle, - struct nlattr **tca, unsigned long *arg) + struct nlattr **tca, unsigned long *arg, bool ovr) { struct nlattr *opt = tca[TCA_OPTIONS]; struct nlattr *tb[TCA_TCINDEX_MAX + 1]; @@ -351,7 +351,7 @@ tcindex_change(struct net *net, struct sk_buff *in_skb, return err; return tcindex_set_parms(net, tp, base, handle, p, r, tb, - tca[TCA_RATE]); + tca[TCA_RATE], ovr); } -- cgit v1.2.3