xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: rcu-ify tcf_proto

Browse Source 
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>
This commit is contained in:
John Fastabend
2014-09-12 20:05:27 -07:00
committed by David S. Miller
parent 46e5da40ae
commit 25d8c0d55f
17 changed files with 121 additions and 88 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
net/sched/sch_dsmark.c
View File

@@ -37,7 +37,7 @@
struct dsmark_qdisc_data {
struct Qdisc *q;
struct tcf_proto *filter_list;
struct tcf_proto __rcu *filter_list;
u8 *mask; /* "owns" the array */
u8 *value;
u16 indices;
@@ -186,8 +186,8 @@ ignore:
}
}
static inline struct tcf_proto **dsmark_find_tcf(struct Qdisc *sch,
unsigned long cl)
static inline struct tcf_proto __rcu **dsmark_find_tcf(struct Qdisc *sch,
unsigned long cl)
{
struct dsmark_qdisc_data *p = qdisc_priv(sch);
return &p->filter_list;
@@ -229,7 +229,8 @@ static int dsmark_enqueue(struct sk_buff *skb, struct Qdisc *sch)
skb->tc_index = TC_H_MIN(skb->priority);
else {
struct tcf_result res;
int result = tc_classify(skb, p->filter_list, &res);
struct tcf_proto *fl = rcu_dereference_bh(p->filter_list);
int result = tc_classify(skb, fl, &res);
pr_debug("result %d class 0x%04x\n", result, res.classid);