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| author | John Fastabend <john.fastabend@gmail.com> | 2014-09-12 20:05:27 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-13 12:30:25 -0400 |
| commit | 25d8c0d55f241ce2d360df1bea48e23a55836ee6 (patch) | |
| tree | c0aca67607e7ce560a4a2cebef5fb6d55adf4112 /net/sched/sch_multiq.c | |
| parent | 46e5da40aec256155cfedee96dd21a75da941f2c (diff) | |
| download | linux-25d8c0d55f241ce2d360df1bea48e23a55836ee6.tar.gz | |
net: rcu-ify tcf_proto
rcu'ify tcf_proto this allows calling tc_classify() without holding any locks. Updaters are protected by RTNL. This patch prepares the core net_sched infrastracture for running the classifier/action chains without holding the qdisc lock however it does nothing to ensure cls_xxx and act_xxx types also work without locking. Additional patches are required to address the fall out. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_multiq.c')
| -rw-r--r-- | net/sched/sch_multiq.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c index afb050a735fa..c0466c1840f3 100644 --- a/net/sched/sch_multiq.c +++ b/net/sched/sch_multiq.c @@ -31,7 +31,7 @@ struct multiq_sched_data { u16 bands; u16 max_bands; u16 curband; - struct tcf_proto *filter_list; + struct tcf_proto __rcu *filter_list; struct Qdisc **queues; }; @@ -42,10 +42,11 @@ multiq_classify(struct sk_buff *skb, struct Qdisc *sch, int *qerr) struct multiq_sched_data *q = qdisc_priv(sch); u32 band; struct tcf_result res; + struct tcf_proto *fl = rcu_dereference_bh(q->filter_list); int err; *qerr = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS; - err = tc_classify(skb, q->filter_list, &res); + err = tc_classify(skb, fl, &res); #ifdef CONFIG_NET_CLS_ACT switch (err) { case TC_ACT_STOLEN: @@ -388,7 +389,8 @@ static void multiq_walk(struct Qdisc *sch, struct qdisc_walker *arg) } } -static struct tcf_proto **multiq_find_tcf(struct Qdisc *sch, unsigned long cl) +static struct tcf_proto __rcu **multiq_find_tcf(struct Qdisc *sch, + unsigned long cl) { struct multiq_sched_data *q = qdisc_priv(sch); |