1 files changed, 23 insertions, 13 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index d510353ef43..641f2e47f16 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -149,9 +149,10 @@ static inline void unix_set_secdata(struct scm_cookie *scm, struct sk_buff *skb)
  *    each socket state is protected by separate spin lock.
  */
 
-static inline unsigned unix_hash_fold(__wsum n)
+static inline unsigned int unix_hash_fold(__wsum n)
 {
-	unsigned hash = (__force unsigned)n;
+	unsigned int hash = (__force unsigned int)n;
+
 	hash ^= hash>>16;
 	hash ^= hash>>8;
 	return hash&(UNIX_HASH_SIZE-1);
@@ -200,7 +201,7 @@ static inline void unix_release_addr(struct unix_address *addr)
  *		- if started by zero, it is abstract name.
  */
 
-static int unix_mkname(struct sockaddr_un *sunaddr, int len, unsigned *hashp)
+static int unix_mkname(struct sockaddr_un *sunaddr, int len, unsigned int *hashp)
 {
 	if (len <= sizeof(short) || len > sizeof(*sunaddr))
 		return -EINVAL;
@@ -250,7 +251,7 @@ static inline void unix_insert_socket(struct hlist_head *list, struct sock *sk)
 
 static struct sock *__unix_find_socket_byname(struct net *net,
 					      struct sockaddr_un *sunname,
-					      int len, int type, unsigned hash)
+					      int len, int type, unsigned int hash)
 {
 	struct sock *s;
 	struct hlist_node *node;
@@ -273,7 +274,7 @@ found:
 static inline struct sock *unix_find_socket_byname(struct net *net,
 						   struct sockaddr_un *sunname,
 						   int len, int type,
-						   unsigned hash)
+						   unsigned int hash)
 {
 	struct sock *s;
 
@@ -760,7 +761,7 @@ out:	mutex_unlock(&u->readlock);
 
 static struct sock *unix_find_other(struct net *net,
 				    struct sockaddr_un *sunname, int len,
-				    int type, unsigned hash, int *error)
+				    int type, unsigned int hash, int *error)
 {
 	struct sock *u;
 	struct path path;
@@ -824,7 +825,7 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 	struct dentry *dentry = NULL;
 	struct path path;
 	int err;
-	unsigned hash;
+	unsigned int hash;
 	struct unix_address *addr;
 	struct hlist_head *list;
 
@@ -964,7 +965,7 @@ static int unix_dgram_connect(struct socket *sock, struct sockaddr *addr,
 	struct net *net = sock_net(sk);
 	struct sockaddr_un *sunaddr = (struct sockaddr_un *)addr;
 	struct sock *other;
-	unsigned hash;
+	unsigned int hash;
 	int err;
 
 	if (addr->sa_family != AF_UNSPEC) {
@@ -1062,7 +1063,7 @@ static int unix_stream_connect(struct socket *sock, struct sockaddr *uaddr,
 	struct sock *newsk = NULL;
 	struct sock *other = NULL;
 	struct sk_buff *skb = NULL;
-	unsigned hash;
+	unsigned int hash;
 	int st;
 	int err;
 	long timeo;
@@ -1437,11 +1438,12 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	struct sock *other = NULL;
 	int namelen = 0; /* fake GCC */
 	int err;
-	unsigned hash;
+	unsigned int hash;
 	struct sk_buff *skb;
 	long timeo;
 	struct scm_cookie tmp_scm;
 	int max_level;
+	int data_len = 0;
 
 	if (NULL == siocb->scm)
 		siocb->scm = &tmp_scm;
@@ -1475,7 +1477,13 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	if (len > sk->sk_sndbuf - 32)
 		goto out;
 
-	skb = sock_alloc_send_skb(sk, len, msg->msg_flags&MSG_DONTWAIT, &err);
+	if (len > SKB_MAX_ALLOC)
+		data_len = min_t(size_t,
+				 len - SKB_MAX_ALLOC,
+				 MAX_SKB_FRAGS * PAGE_SIZE);
+
+	skb = sock_alloc_send_pskb(sk, len - data_len, data_len,
+				   msg->msg_flags & MSG_DONTWAIT, &err);
 	if (skb == NULL)
 		goto out;
 
@@ -1485,8 +1493,10 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
 	max_level = err + 1;
 	unix_get_secdata(siocb->scm, skb);
 
-	skb_reset_transport_header(skb);
-	err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+	skb_put(skb, len - data_len);
+	skb->data_len = data_len;
+	skb->len = len;
+	err = skb_copy_datagram_from_iovec(skb, 0, msg->msg_iov, 0, len);
 	if (err)
 		goto out_free;