>From 9c3f80dceec414ff31d0c38d0107dec279fc9894 Mon Sep 17 00:00:00 2001 From: Mateusz Bajorski Date: Fri, 20 May 2016 14:29:56 +0200 Subject: [PATCH] Added NLM_F_EXCL support to fib_nl_newrule Signed-off-by: Mateusz Bajorski --- net/core/fib_rules.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c index 840aceb..c1bc07cd 100644 --- a/net/core/fib_rules.c +++ b/net/core/fib_rules.c @@ -291,6 +291,47 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh) if (err < 0) goto errout; + if (nlh->nlmsg_flags & NLM_F_EXCL) { + list_for_each_entry(rule, &ops->rules_list, list) { + if (frh->action && (frh->action != rule->action)) + continue; + + if (frh_get_table(frh, tb) && + (frh_get_table(frh, tb) != rule->table)) + continue; + + if (tb[FRA_PRIORITY] && + (rule->pref != nla_get_u32(tb[FRA_PRIORITY]))) + continue; + + if (tb[FRA_IIFNAME] && + nla_strcmp(tb[FRA_IIFNAME], rule->iifname)) + continue; + + if (tb[FRA_OIFNAME] && + nla_strcmp(tb[FRA_OIFNAME], rule->oifname)) + continue; + + if (tb[FRA_FWMARK] && + (rule->mark != nla_get_u32(tb[FRA_FWMARK]))) + continue; + + if (tb[FRA_FWMASK] && + (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK]))) + continue; + + if (tb[FRA_TUN_ID] && + (rule->tun_id != nla_get_be64(tb[FRA_TUN_ID]))) + continue; + + if (!ops->compare(rule, frh, tb)) + continue; + + err = -EEXIST; + goto errout; + } + } + rule = kzalloc(ops->rule_size, GFP_KERNEL); if (rule == NULL) { err = -ENOMEM; -- 2.6.4