From 1a29321ed045e3aad23c5f7b63036e465ee3093a Mon Sep 17 00:00:00 2001 From: Jamal Hadi Salim Date: Mon, 23 Dec 2013 08:02:11 -0500 Subject: net_sched: act: Dont increment refcnt on replace This is a bug fix. The existing code tries to kill many birds with one stone: Handling binding of actions to filters, new actions and replacing of action attributes. A simple test case to illustrate: XXXX moja@fe1:~$ sudo tc actions add action drop index 12 moja@fe1:~$ actions get action gact index 12 action order 1: gact action drop random type none pass val 0 index 12 ref 1 bind 0 moja@fe1:~$ sudo tc actions replace action ok index 12 moja@fe1:~$ actions get action gact index 12 action order 1: gact action drop random type none pass val 0 index 12 ref 2 bind 0 XXXX The above shows the refcounf being wrongly incremented on replace. There are more complex scenarios with binding of actions to filters that i am leaving out that didnt work as well... Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/sched/act_csum.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'net/sched/act_csum.c') diff --git a/net/sched/act_csum.c b/net/sched/act_csum.c index 5c5edf56adbd..11fe1a416433 100644 --- a/net/sched/act_csum.c +++ b/net/sched/act_csum.c @@ -77,16 +77,16 @@ static int tcf_csum_init(struct net *n, struct nlattr *nla, struct nlattr *est, &csum_idx_gen, &csum_hash_info); if (IS_ERR(pc)) return PTR_ERR(pc); - p = to_tcf_csum(pc); ret = ACT_P_CREATED; } else { - p = to_tcf_csum(pc); - if (!ovr) { - tcf_hash_release(pc, bind, &csum_hash_info); + if (bind)/* dont override defaults */ + return 0; + tcf_hash_release(pc, bind, &csum_hash_info); + if (!ovr) return -EEXIST; - } } + p = to_tcf_csum(pc); spin_lock_bh(&p->tcf_lock); p->tcf_action = parm->action; p->update_flags = parm->update_flags; -- cgit v1.2.3-59-g8ed1b