From f94fd041402e4e70d2b4ed00008b9bb857e6ae87 Mon Sep 17 00:00:00 2001 From: Julius Volz Date: Tue, 2 Sep 2008 15:55:55 +0200 Subject: [PATCH] IPVS: Allow adding IPv6 services from userspace Allow adding IPv6 services through the genetlink interface and add checks to see if the chosen scheduler is supported with IPv6 and whether the supplied prefix length is sane. Make sure the service count exported via the sockopt interface only counts IPv4 services. Signed-off-by: Julius Volz Signed-off-by: Simon Horman --- net/ipv4/ipvs/ip_vs_ctl.c | 53 +++++++++++++++++++++++++++++++++++---- 1 file changed, 48 insertions(+), 5 deletions(-) diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c index 6dbc527285fa..7f89c588e588 100644 --- a/net/ipv4/ipvs/ip_vs_ctl.c +++ b/net/ipv4/ipvs/ip_vs_ctl.c @@ -1177,6 +1177,19 @@ ip_vs_add_service(struct ip_vs_service_user_kern *u, goto out_mod_dec; } +#ifdef CONFIG_IP_VS_IPV6 + if (u->af == AF_INET6) { + if (!sched->supports_ipv6) { + ret = -EAFNOSUPPORT; + goto out_err; + } + if ((u->netmask < 1) || (u->netmask > 128)) { + ret = -EINVAL; + goto out_err; + } + } +#endif + svc = kzalloc(sizeof(struct ip_vs_service), GFP_ATOMIC); if (svc == NULL) { IP_VS_DBG(1, "ip_vs_add_service: kmalloc failed.\n"); @@ -1214,7 +1227,10 @@ ip_vs_add_service(struct ip_vs_service_user_kern *u, atomic_inc(&ip_vs_nullsvc_counter); ip_vs_new_estimator(&svc->stats); - ip_vs_num_services++; + + /* Count only IPv4 services for old get/setsockopt interface */ + if (svc->af == AF_INET) + ip_vs_num_services++; /* Hash the service into the service table */ write_lock_bh(&__ip_vs_svc_lock); @@ -1265,6 +1281,19 @@ ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u) } old_sched = sched; +#ifdef CONFIG_IP_VS_IPV6 + if (u->af == AF_INET6) { + if (!sched->supports_ipv6) { + ret = EAFNOSUPPORT; + goto out; + } + if ((u->netmask < 1) || (u->netmask > 128)) { + ret = EINVAL; + goto out; + } + } +#endif + write_lock_bh(&__ip_vs_svc_lock); /* @@ -1329,7 +1358,10 @@ static void __ip_vs_del_service(struct ip_vs_service *svc) struct ip_vs_dest *dest, *nxt; struct ip_vs_scheduler *old_sched; - ip_vs_num_services--; + /* Count only IPv4 services for old get/setsockopt interface */ + if (svc->af == AF_INET) + ip_vs_num_services--; + ip_vs_kill_estimator(&svc->stats); /* Unbind scheduler */ @@ -2212,6 +2244,10 @@ __ip_vs_get_service_entries(const struct ip_vs_get_services *get, for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { list_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) { + /* Only expose IPv4 entries to old interface */ + if (svc->af != AF_INET) + continue; + if (count >= get->num_services) goto out; memset(&entry, 0, sizeof(entry)); @@ -2227,6 +2263,10 @@ __ip_vs_get_service_entries(const struct ip_vs_get_services *get, for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) { list_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) { + /* Only expose IPv4 entries to old interface */ + if (svc->af != AF_INET) + continue; + if (count >= get->num_services) goto out; memset(&entry, 0, sizeof(entry)); @@ -2584,7 +2624,7 @@ static int ip_vs_genl_fill_service(struct sk_buff *skb, if (!nl_service) return -EMSGSIZE; - NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, AF_INET); + NLA_PUT_U16(skb, IPVS_SVC_ATTR_AF, svc->af); if (svc->fwmark) { NLA_PUT_U32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark); @@ -2691,8 +2731,11 @@ static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc, return -EINVAL; usvc->af = nla_get_u16(nla_af); - /* For now, only support IPv4 */ - if (nla_get_u16(nla_af) != AF_INET) +#ifdef CONFIG_IP_VS_IPV6 + if (usvc->af != AF_INET && usvc->af != AF_INET6) +#else + if (usvc->af != AF_INET) +#endif return -EAFNOSUPPORT; if (nla_fwmark) { -- 2.20.1