7 files changed, 61 insertions, 21 deletions

diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 5a04db745c..d6cfe84d52 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -20,7 +20,6 @@
  *
  * See the GNU General Public License for more details.
  */
-#include <linux/config.h>
 #include <linux/compiler.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
@@ -674,7 +673,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
 
         lock_sock(sk);
         copied = -ENOTCONN;
-        if (sk->sk_state == TCP_LISTEN)
+        if (unlikely(sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_LISTEN))
                 goto out;
 
         timeo = sock_rcvtimeo(sk, nonblock);
@@ -733,7 +732,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
                         if (sk->sk_shutdown & RCV_SHUTDOWN)
                                 break;
 
-                        if (sk->sk_state == TCP_CLOSE) {
+                        if (sk->sk_type == SOCK_STREAM && sk->sk_state == TCP_CLOSE) {
                                 if (!sock_flag(sk, SOCK_DONE)) {
                                         /*
                                          * This occurs when user tries to read
@@ -789,7 +788,7 @@ static int llc_ui_recvmsg(struct kiocb *iocb, struct socket *sock,
                         continue;
 
                 if (!(flags & MSG_PEEK)) {
-                        sk_eat_skb(sk, skb);
+                        sk_eat_skb(sk, skb, 0);
                         *seq = 0;
                 }
         } while (len > 0);
diff --git a/net/llc/llc_if.c b/net/llc/llc_if.c
index ba90f7f080..a89917130a 100644
--- a/net/llc/llc_if.c
+++ b/net/llc/llc_if.c
@@ -11,7 +11,6 @@
  *
  * See the GNU General Public License for more details.
  */
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
@@ -26,8 +25,6 @@
 #include <net/llc_c_st.h>
 #include <net/tcp_states.h>
 
-u8 llc_mac_null_var[IFHWADDRLEN];
-
 /**
  *      llc_build_and_send_pkt - Connection data sending for upper layers.
  *      @sk: connection
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index d62e0f9b9d..94d2368ade 100644
--- a/net/llc/llc_input.c
+++ b/net/llc/llc_input.c
@@ -142,6 +142,8 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
         struct llc_sap *sap;
         struct llc_pdu_sn *pdu;
         int dest;
+        int (*rcv)(struct sk_buff *, struct net_device *,
+                   struct packet_type *, struct net_device *);
 
         /*
          * When the interface is in promisc. mode, drop all the crap that it
@@ -169,9 +171,11 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
          * First the upper layer protocols that don't need the full
          * LLC functionality
          */
-        if (sap->rcv_func) {
-                sap->rcv_func(skb, dev, pt, orig_dev);
-                goto out_put;
+        rcv = rcu_dereference(sap->rcv_func);
+        if (rcv) {
+                struct sk_buff *cskb = skb_clone(skb, GFP_ATOMIC);
+                if (cskb)
+                        rcv(cskb, dev, pt, orig_dev);
         }
         dest = llc_pdu_type(skb);
         if (unlikely(!dest || !llc_type_handlers[dest - 1]))
diff --git a/net/llc/llc_proc.c b/net/llc/llc_proc.c
index bd531cb235..19308fece3 100644
--- a/net/llc/llc_proc.c
+++ b/net/llc/llc_proc.c
@@ -12,7 +12,6 @@
  * See the GNU General Public License for more details.
  */
 
-#include <linux/config.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/proc_fs.h>
diff --git a/net/llc/llc_sap.c b/net/llc/llc_sap.c
index 4029ceee9b..20c4eb5c1a 100644
--- a/net/llc/llc_sap.c
+++ b/net/llc/llc_sap.c
@@ -282,7 +282,7 @@ static void llc_sap_rcv(struct llc_sap *sap, struct sk_buff *skb)
  *      mac, and local sap. Returns pointer for socket found, %NULL otherwise.
  */
 static struct sock *llc_lookup_dgram(struct llc_sap *sap,
-                                     struct llc_addr *laddr)
+                                     const struct llc_addr *laddr)
 {
         struct sock *rc;
         struct hlist_node *node;
@@ -304,19 +304,62 @@ found:
         return rc;
 }
 
+/**
+ *      llc_sap_mcast - Deliver multicast PDU's to all matching datagram sockets.
+ *      @sap: SAP
+ *      @laddr: address of local LLC (MAC + SAP)
+ *
+ *      Search socket list of the SAP and finds connections with same sap.
+ *      Deliver clone to each.
+ */
+static void llc_sap_mcast(struct llc_sap *sap,
+                          const struct llc_addr *laddr,
+                          struct sk_buff *skb)
+{
+        struct sock *sk;
+        struct hlist_node *node;
+
+        read_lock_bh(&sap->sk_list.lock);
+        sk_for_each(sk, node, &sap->sk_list.list) {
+                struct llc_sock *llc = llc_sk(sk);
+                struct sk_buff *skb1;
+
+                if (sk->sk_type != SOCK_DGRAM)
+                        continue;
+
+                if (llc->laddr.lsap != laddr->lsap)
+                        continue;
+
+                skb1 = skb_clone(skb, GFP_ATOMIC);
+                if (!skb1)
+                        break;
+
+                sock_hold(sk);
+                skb_set_owner_r(skb1, sk);
+                llc_sap_rcv(sap, skb1);
+                sock_put(sk);
+        }
+        read_unlock_bh(&sap->sk_list.lock);
+}
+
+
 void llc_sap_handler(struct llc_sap *sap, struct sk_buff *skb)
 {
         struct llc_addr laddr;
-        struct sock *sk;
 
         llc_pdu_decode_da(skb, laddr.mac);
         llc_pdu_decode_dsap(skb, &laddr.lsap);
 
-        sk = llc_lookup_dgram(sap, &laddr);
-        if (sk) {
-                skb_set_owner_r(skb, sk);
-                llc_sap_rcv(sap, skb);
-                sock_put(sk);
-        } else
+        if (llc_mac_multicast(laddr.mac)) {
+                llc_sap_mcast(sap, &laddr, skb);
                 kfree_skb(skb);
+        } else {
+                struct sock *sk = llc_lookup_dgram(sap, &laddr);
+                if (sk) {
+                        skb_set_owner_r(skb, sk);
+                        llc_sap_rcv(sap, skb);
+                        sock_put(sk);
+                } else
+                        kfree_skb(skb);
+        }
 }
diff --git a/net/llc/llc_station.c b/net/llc/llc_station.c
index f37dbf8ef1..8275bd33bd 100644
--- a/net/llc/llc_station.c
+++ b/net/llc/llc_station.c
@@ -11,7 +11,6 @@
  *
  * See the GNU General Public License for more details.
  */
-#include <linux/config.h>
 #include <linux/init.h>
 #include <linux/module.h>
 #include <net/llc.h>
diff --git a/net/llc/sysctl_net_llc.c b/net/llc/sysctl_net_llc.c
index d1eaddb136..45d7dd92a0 100644
--- a/net/llc/sysctl_net_llc.c
+++ b/net/llc/sysctl_net_llc.c
@@ -4,7 +4,6 @@
  * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
  */
 
-#include <linux/config.h>
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/sysctl.h>