inet_diag: Switch from _GETSOCK to IPPROTO_ numbers

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When dumping the AF_INET/AF_INET6 sockets user will also specify the protocol,
so prepare the protocol diag handlers to work with IPPROTO_ constants.

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

1 files changed, 23 insertions, 11 deletions

diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 7aad6ad24dda..58caecc343b1 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -50,19 +50,31 @@ static struct sock *sdiagnl;
 #define INET_DIAG_PUT(skb, attrtype, attrlen) \
         RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
 
+static inline int inet_diag_type2proto(int type)
+{
+        switch (type) {
+        case TCPDIAG_GETSOCK:
+                return IPPROTO_TCP;
+        case DCCPDIAG_GETSOCK:
+                return IPPROTO_DCCP;
+        default:
+                return 0;
+        }
+}
+
 static DEFINE_MUTEX(inet_diag_table_mutex);
 
-static const struct inet_diag_handler *inet_diag_lock_handler(int type)
+static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
 {
-        if (!inet_diag_table[type])
+        if (!inet_diag_table[proto])
                 request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
-                               NETLINK_SOCK_DIAG, type);
+                               NETLINK_SOCK_DIAG, proto);
 
         mutex_lock(&inet_diag_table_mutex);
-        if (!inet_diag_table[type])
+        if (!inet_diag_table[proto])
                 return ERR_PTR(-ENOENT);
 
-        return inet_diag_table[type];
+        return inet_diag_table[proto];
 }
 
 static inline void inet_diag_unlock_handler(
@@ -85,7 +97,7 @@ static int inet_csk_diag_fill(struct sock *sk,
         unsigned char    *b = skb_tail_pointer(skb);
         const struct inet_diag_handler *handler;
 
-        handler = inet_diag_table[unlh->nlmsg_type];
+        handler = inet_diag_table[inet_diag_type2proto(unlh->nlmsg_type)];
         BUG_ON(handler == NULL);
 
         nlh = NLMSG_PUT(skb, pid, seq, unlh->nlmsg_type, sizeof(*r));
@@ -257,7 +269,7 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
         struct inet_hashinfo *hashinfo;
         const struct inet_diag_handler *handler;
 
-        handler = inet_diag_lock_handler(nlh->nlmsg_type);
+        handler = inet_diag_lock_handler(inet_diag_type2proto(nlh->nlmsg_type));
         if (IS_ERR(handler)) {
                 err = PTR_ERR(handler);
                 goto unlock;
@@ -707,7 +719,7 @@ static int inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
         if (nlmsg_attrlen(cb->nlh, sizeof(struct inet_diag_req)))
                 bc = nlmsg_find_attr(cb->nlh, sizeof(*r), INET_DIAG_REQ_BYTECODE);
 
-        handler = inet_diag_lock_handler(cb->nlh->nlmsg_type);
+        handler = inet_diag_lock_handler(inet_diag_type2proto(cb->nlh->nlmsg_type));
         if (IS_ERR(handler))
                 goto unlock;
 
@@ -907,7 +919,7 @@ int inet_diag_register(const struct inet_diag_handler *h)
         const __u16 type = h->idiag_type;
         int err = -EINVAL;
 
-        if (type >= INET_DIAG_GETSOCK_MAX)
+        if (type >= IPPROTO_MAX)
                 goto out;
 
         mutex_lock(&inet_diag_table_mutex);
@@ -926,7 +938,7 @@ void inet_diag_unregister(const struct inet_diag_handler *h)
 {
         const __u16 type = h->idiag_type;
 
-        if (type >= INET_DIAG_GETSOCK_MAX)
+        if (type >= IPPROTO_MAX)
                 return;
 
         mutex_lock(&inet_diag_table_mutex);
@@ -937,7 +949,7 @@ EXPORT_SYMBOL_GPL(inet_diag_unregister);
 
 static int __init inet_diag_init(void)
 {
-        const int inet_diag_table_size = (INET_DIAG_GETSOCK_MAX *
+        const int inet_diag_table_size = (IPPROTO_MAX *
                                           sizeof(struct inet_diag_handler *));
         int err = -ENOMEM;