diff options
Diffstat (limited to 'net/core/fib_rules.c')
-rw-r--r-- | net/core/fib_rules.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index 1bc3f25..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; @@ -373,6 +373,11 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) fib_rule_get(rule); + if (last) + list_add_rcu(&rule->list, &last->list); + else + list_add_rcu(&rule->list, &ops->rules_list); + if (ops->unresolved_rules) { /* * There are unresolved goto rules in the list, check if @@ -381,7 +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; @@ -395,11 +400,6 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) if (unresolved) ops->unresolved_rules++; - if (last) - list_add_rcu(&rule->list, &last->list); - else - list_add_rcu(&rule->list, &ops->rules_list); - notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid); flush_route_cache(ops); rules_ops_put(ops); @@ -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]) { |