inet_diag: Introduce the byte-code run on an inet socket

The upcoming UDP module will require exactly this ability, so just
move the existing code to provide one.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
index 5036747..907c899 100644 (file)
--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -135,6 +135,7 @@ struct tcpvegas_info {
 #ifdef __KERNEL__
 struct sock;
 struct inet_hashinfo;
+struct nlattr;
 
 struct inet_diag_handler {
        struct inet_hashinfo    *idiag_hashinfo;
@@ -144,6 +145,7 @@ struct inet_diag_handler {
        __u16                   idiag_type;
 };
 
+int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
 int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req);
 
 extern int  inet_diag_register(const struct inet_diag_handler *handler);

diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index f50df2e..08e5498 100644 (file)
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -449,6 +449,35 @@ static int inet_diag_bc_run(const struct nlattr *_bc,
        return len == 0;
 }
 
+int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
+{
+       struct inet_diag_entry entry;
+       struct inet_sock *inet = inet_sk(sk);
+
+       if (bc == NULL)
+               return 1;
+
+       entry.family = sk->sk_family;
+#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
+       if (entry.family == AF_INET6) {
+               struct ipv6_pinfo *np = inet6_sk(sk);
+
+               entry.saddr = np->rcv_saddr.s6_addr32;
+               entry.daddr = np->daddr.s6_addr32;
+       } else
+#endif
+       {
+               entry.saddr = &inet->inet_rcv_saddr;
+               entry.daddr = &inet->inet_daddr;
+       }
+       entry.sport = inet->inet_num;
+       entry.dport = ntohs(inet->inet_dport);
+       entry.userlocks = sk->sk_userlocks;
+
+       return inet_diag_bc_run(bc, &entry);
+}
+EXPORT_SYMBOL_GPL(inet_diag_bc_sk);
+
 static int valid_cc(const void *bc, int len, int cc)
 {
        while (len >= 0) {
@@ -509,30 +538,8 @@ static int inet_csk_diag_dump(struct sock *sk,
                              struct inet_diag_req *r,
                              const struct nlattr *bc)
 {
-       if (bc != NULL) {
-               struct inet_diag_entry entry;
-               struct inet_sock *inet = inet_sk(sk);
-
-               entry.family = sk->sk_family;
-#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-               if (entry.family == AF_INET6) {
-                       struct ipv6_pinfo *np = inet6_sk(sk);
-
-                       entry.saddr = np->rcv_saddr.s6_addr32;
-                       entry.daddr = np->daddr.s6_addr32;
-               } else
-#endif
-               {
-                       entry.saddr = &inet->inet_rcv_saddr;
-                       entry.daddr = &inet->inet_daddr;
-               }
-               entry.sport = inet->inet_num;
-               entry.dport = ntohs(inet->inet_dport);
-               entry.userlocks = sk->sk_userlocks;
-
-               if (!inet_diag_bc_run(bc, &entry))
-                       return 0;
-       }
+       if (!inet_diag_bc_sk(bc, sk))
+               return 0;
 
        return inet_csk_diag_fill(sk, skb, r,
                                  NETLINK_CB(cb->skb).pid,