From: Eric Dumazet <eric.dumazet@gmail.com>
To: David Miller <davem@davemloft.net>
Cc: netdev <netdev@vger.kernel.org>
Subject: [PATCH] fib_rules: __rcu annotates ctarget
Date: Tue, 26 Oct 2010 21:24:55 +0200 [thread overview]
Message-ID: <1288121095.2652.9.camel@edumazet-laptop> (raw)
Adds __rcu annotation to (struct fib_rule)->ctarget
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---
include/net/fib_rules.h | 2 +-
net/core/fib_rules.c | 11 ++++++-----
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
index 106f309..075f1e3 100644
--- a/include/net/fib_rules.h
+++ b/include/net/fib_rules.h
@@ -20,7 +20,7 @@ struct fib_rule {
u32 table;
u8 action;
u32 target;
- struct fib_rule * ctarget;
+ struct fib_rule __rcu *ctarget;
char iifname[IFNAMSIZ];
char oifname[IFNAMSIZ];
struct rcu_head rcu;
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index 12b43cc..82a4369 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -351,12 +351,12 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
list_for_each_entry(r, &ops->rules_list, list) {
if (r->pref == rule->target) {
- rule->ctarget = r;
+ RCU_INIT_POINTER(rule->ctarget, r);
break;
}
}
- if (rule->ctarget == NULL)
+ if (rcu_dereference_protected(rule->ctarget, 1) == NULL)
unresolved = 1;
} else if (rule->action == FR_ACT_GOTO)
goto errout_free;
@@ -386,7 +386,7 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
list_for_each_entry(r, &ops->rules_list, list) {
if (r->action == FR_ACT_GOTO &&
r->target == rule->pref) {
- BUG_ON(r->ctarget != NULL);
+ BUG_ON(rtnl_dereference(r->ctarget) != NULL);
rcu_assign_pointer(r->ctarget, rule);
if (--ops->unresolved_rules == 0)
break;
@@ -487,7 +487,7 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
*/
if (ops->nr_goto_rules > 0) {
list_for_each_entry(tmp, &ops->rules_list, list) {
- if (tmp->ctarget == rule) {
+ if (rtnl_dereference(tmp->ctarget) == rule) {
rcu_assign_pointer(tmp->ctarget, NULL);
ops->unresolved_rules++;
}
@@ -545,7 +545,8 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
frh->action = rule->action;
frh->flags = rule->flags;
- if (rule->action == FR_ACT_GOTO && rule->ctarget == NULL)
+ if (rule->action == FR_ACT_GOTO &&
+ rcu_dereference_raw(rule->ctarget) == NULL)
frh->flags |= FIB_RULE_UNRESOLVED;
if (rule->iifname[0]) {
next reply other threads:[~2010-10-26 19:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-26 19:24 Eric Dumazet [this message]
2010-10-27 18:22 ` [PATCH] fib_rules: __rcu annotates ctarget David Miller
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