fib_rules: __rcu annotates ctarget
Adds __rcu annotation to (struct fib_rule)->ctarget Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -20,7 +20,7 @@ struct fib_rule {
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u32 table;
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u8 action;
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u32 target;
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struct fib_rule * ctarget;
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struct fib_rule __rcu *ctarget;
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char iifname[IFNAMSIZ];
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char oifname[IFNAMSIZ];
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struct rcu_head rcu;
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@ -351,12 +351,12 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
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list_for_each_entry(r, &ops->rules_list, list) {
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if (r->pref == rule->target) {
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rule->ctarget = r;
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RCU_INIT_POINTER(rule->ctarget, r);
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break;
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}
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}
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if (rule->ctarget == NULL)
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if (rcu_dereference_protected(rule->ctarget, 1) == NULL)
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unresolved = 1;
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} else if (rule->action == FR_ACT_GOTO)
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goto errout_free;
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@ -386,7 +386,7 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
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list_for_each_entry(r, &ops->rules_list, list) {
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if (r->action == FR_ACT_GOTO &&
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r->target == rule->pref) {
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BUG_ON(r->ctarget != NULL);
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BUG_ON(rtnl_dereference(r->ctarget) != NULL);
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rcu_assign_pointer(r->ctarget, rule);
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if (--ops->unresolved_rules == 0)
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break;
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@ -487,7 +487,7 @@ static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
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*/
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if (ops->nr_goto_rules > 0) {
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list_for_each_entry(tmp, &ops->rules_list, list) {
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if (tmp->ctarget == rule) {
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if (rtnl_dereference(tmp->ctarget) == rule) {
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rcu_assign_pointer(tmp->ctarget, NULL);
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ops->unresolved_rules++;
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}
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@ -545,7 +545,8 @@ static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule,
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frh->action = rule->action;
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frh->flags = rule->flags;
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if (rule->action == FR_ACT_GOTO && rule->ctarget == NULL)
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if (rule->action == FR_ACT_GOTO &&
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rcu_dereference_raw(rule->ctarget) == NULL)
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frh->flags |= FIB_RULE_UNRESOLVED;
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if (rule->iifname[0]) {
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