IPVS: Convert __ip_vs_svc_get() and __ip_vs_fwm_get()

Add support for getting services based on their address family to
__ip_vs_service_get(), __ip_vs_fwm_get() and the helper hash function
ip_vs_svc_hashkey(). Adjust the callers.

Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 47 insertions, 32 deletions

diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
index a0c8b7bb5530..a2d69b2ce6a1 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/ipv4/ipvs/ip_vs_ctl.c
@@ -282,11 +282,19 @@ static atomic_t ip_vs_nullsvc_counter = ATOMIC_INIT(0);
  *      Returns hash value for virtual service
  */
 static __inline__ unsigned
-ip_vs_svc_hashkey(unsigned proto, __be32 addr, __be16 port)
+ip_vs_svc_hashkey(int af, unsigned proto, const union nf_inet_addr *addr,
+                  __be16 port)
 {
         register unsigned porth = ntohs(port);
+        __be32 addr_fold = addr->ip;
 
-        return (proto^ntohl(addr)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
+#ifdef CONFIG_IP_VS_IPV6
+        if (af == AF_INET6)
+                addr_fold = addr->ip6[0]^addr->ip6[1]^
+                            addr->ip6[2]^addr->ip6[3];
+#endif
+
+        return (proto^ntohl(addr_fold)^(porth>>IP_VS_SVC_TAB_BITS)^porth)
                 & IP_VS_SVC_TAB_MASK;
 }
 
@@ -317,7 +325,7 @@ static int ip_vs_svc_hash(struct ip_vs_service *svc)
                 /*
                  *  Hash it by <protocol,addr,port> in ip_vs_svc_table
                  */
-                hash = ip_vs_svc_hashkey(svc->protocol, svc->addr.ip,
+                hash = ip_vs_svc_hashkey(svc->af, svc->protocol, &svc->addr,
                                          svc->port);
                 list_add(&svc->s_list, &ip_vs_svc_table[hash]);
         } else {
@@ -364,17 +372,19 @@ static int ip_vs_svc_unhash(struct ip_vs_service *svc)
 /*
  *      Get service by {proto,addr,port} in the service table.
  */
-static __inline__ struct ip_vs_service *
-__ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport)
+static inline struct ip_vs_service *
+__ip_vs_service_get(int af, __u16 protocol, const union nf_inet_addr *vaddr,
+                    __be16 vport)
 {
         unsigned hash;
         struct ip_vs_service *svc;
 
         /* Check for "full" addressed entries */
-        hash = ip_vs_svc_hashkey(protocol, vaddr, vport);
+        hash = ip_vs_svc_hashkey(af, protocol, vaddr, vport);
 
         list_for_each_entry(svc, &ip_vs_svc_table[hash], s_list){
-                if ((svc->addr.ip == vaddr)
+                if ((svc->af == af)
+                    && ip_vs_addr_equal(af, &svc->addr, vaddr)
                     && (svc->port == vport)
                     && (svc->protocol == protocol)) {
                         /* HIT */
@@ -390,7 +400,8 @@ __ip_vs_service_get(__u16 protocol, __be32 vaddr, __be16 vport)
 /*
  *      Get service by {fwmark} in the service table.
  */
-static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
+static inline struct ip_vs_service *
+__ip_vs_svc_fwm_get(int af, __u32 fwmark)
 {
         unsigned hash;
         struct ip_vs_service *svc;
@@ -399,7 +410,7 @@ static __inline__ struct ip_vs_service *__ip_vs_svc_fwm_get(__u32 fwmark)
         hash = ip_vs_svc_fwm_hashkey(fwmark);
 
         list_for_each_entry(svc, &ip_vs_svc_fwm_table[hash], f_list) {
-                if (svc->fwmark == fwmark) {
+                if (svc->fwmark == fwmark && svc->af == af) {
                         /* HIT */
                         atomic_inc(&svc->usecnt);
                         return svc;
@@ -413,20 +424,20 @@ struct ip_vs_service *
 ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
 {
         struct ip_vs_service *svc;
-
+        union nf_inet_addr _vaddr = { .ip = vaddr };
         read_lock(&__ip_vs_svc_lock);
 
         /*
          *      Check the table hashed by fwmark first
          */
-        if (fwmark && (svc = __ip_vs_svc_fwm_get(fwmark)))
+        if (fwmark && (svc = __ip_vs_svc_fwm_get(AF_INET, fwmark)))
                 goto out;
 
         /*
          *      Check the table hashed by <protocol,addr,port>
          *      for "full" addressed entries
          */
-        svc = __ip_vs_service_get(protocol, vaddr, vport);
+        svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, vport);
 
         if (svc == NULL
             && protocol == IPPROTO_TCP
@@ -436,7 +447,7 @@ ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
                  * Check if ftp service entry exists, the packet
                  * might belong to FTP data connections.
                  */
-                svc = __ip_vs_service_get(protocol, vaddr, FTPPORT);
+                svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, FTPPORT);
         }
 
         if (svc == NULL
@@ -444,7 +455,7 @@ ip_vs_service_get(__u32 fwmark, __u16 protocol, __be32 vaddr, __be16 vport)
                 /*
                  * Check if the catch-all port (port zero) exists
                  */
-                svc = __ip_vs_service_get(protocol, vaddr, 0);
+                svc = __ip_vs_service_get(AF_INET, protocol, &_vaddr, 0);
         }
 
   out:
@@ -2016,10 +2027,10 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
 
         /* Lookup the exact service by <protocol, addr, port> or fwmark */
         if (usvc.fwmark == 0)
-                svc = __ip_vs_service_get(usvc.protocol,
-                                          usvc.addr.ip, usvc.port);
+                svc = __ip_vs_service_get(usvc.af, usvc.protocol,
+                                          &usvc.addr, usvc.port);
         else
-                svc = __ip_vs_svc_fwm_get(usvc.fwmark);
+                svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
 
         if (cmd != IP_VS_SO_SET_ADD
             && (svc == NULL || svc->protocol != usvc.protocol)) {
@@ -2141,13 +2152,15 @@ __ip_vs_get_dest_entries(const struct ip_vs_get_dests *get,
                          struct ip_vs_get_dests __user *uptr)
 {
         struct ip_vs_service *svc;
+        union nf_inet_addr addr = { .ip = get->addr };
         int ret = 0;
 
         if (get->fwmark)
-                svc = __ip_vs_svc_fwm_get(get->fwmark);
+                svc = __ip_vs_svc_fwm_get(AF_INET, get->fwmark);
         else
-                svc = __ip_vs_service_get(get->protocol,
-                                          get->addr, get->port);
+                svc = __ip_vs_service_get(AF_INET, get->protocol, &addr,
+                                          get->port);
+
         if (svc) {
                 int count = 0;
                 struct ip_vs_dest *dest;
@@ -2282,13 +2295,15 @@ do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
         {
                 struct ip_vs_service_entry *entry;
                 struct ip_vs_service *svc;
+                union nf_inet_addr addr;
 
                 entry = (struct ip_vs_service_entry *)arg;
+                addr.ip = entry->addr;
                 if (entry->fwmark)
-                        svc = __ip_vs_svc_fwm_get(entry->fwmark);
+                        svc = __ip_vs_svc_fwm_get(AF_INET, entry->fwmark);
                 else
-                        svc = __ip_vs_service_get(entry->protocol,
-                                                  entry->addr, entry->port);
+                        svc = __ip_vs_service_get(AF_INET, entry->protocol,
+                                                  &addr, entry->port);
                 if (svc) {
                         ip_vs_copy_service(entry, svc);
                         if (copy_to_user(user, entry, sizeof(*entry)) != 0)
@@ -2613,10 +2628,10 @@ static int ip_vs_genl_parse_service(struct ip_vs_service_user_kern *usvc,
 
                 /* prefill flags from service if it already exists */
                 if (usvc->fwmark)
-                        svc = __ip_vs_svc_fwm_get(usvc->fwmark);
+                        svc = __ip_vs_svc_fwm_get(usvc->af, usvc->fwmark);
                 else
-                        svc = __ip_vs_service_get(usvc->protocol, usvc->addr.ip,
-                                                  usvc->port);
+                        svc = __ip_vs_service_get(usvc->af, usvc->protocol,
+                                                  &usvc->addr, usvc->port);
                 if (svc) {
                         usvc->flags = svc->flags;
                         ip_vs_service_put(svc);
@@ -2644,10 +2659,10 @@ static struct ip_vs_service *ip_vs_genl_find_service(struct nlattr *nla)
                 return ERR_PTR(ret);
 
         if (usvc.fwmark)
-                return __ip_vs_svc_fwm_get(usvc.fwmark);
+                return __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
         else
-                return __ip_vs_service_get(usvc.protocol, usvc.addr.ip,
-                                           usvc.port);
+                return __ip_vs_service_get(usvc.af, usvc.protocol,
+                                           &usvc.addr, usvc.port);
 }
 
 static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
@@ -2955,10 +2970,10 @@ static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
 
         /* Lookup the exact service by <protocol, addr, port> or fwmark */
         if (usvc.fwmark == 0)
-                svc = __ip_vs_service_get(usvc.protocol, usvc.addr.ip,
-                                          usvc.port);
+                svc = __ip_vs_service_get(usvc.af, usvc.protocol,
+                                          &usvc.addr, usvc.port);
         else
-                svc = __ip_vs_svc_fwm_get(usvc.fwmark);
+                svc = __ip_vs_svc_fwm_get(usvc.af, usvc.fwmark);
 
         /* Unless we're adding a new service, the service must already exist */
         if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {