1 files changed, 34 insertions, 30 deletions

diff --git a/net/socket.c b/net/socket.c
index c044d1e8508c..5f77a8e93830 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -533,7 +533,7 @@ static const struct inode_operations sockfs_inode_ops = {
  *	NULL is returned.
  */
 
-static struct socket *sock_alloc(void)
+struct socket *sock_alloc(void)
 {
 	struct inode *inode;
 	struct socket *sock;
@@ -554,6 +554,7 @@ static struct socket *sock_alloc(void)
 	this_cpu_add(sockets_in_use, 1);
 	return sock;
 }
+EXPORT_SYMBOL(sock_alloc);
 
 /**
  *	sock_release	-	close a socket
@@ -1106,12 +1107,8 @@ int __sock_create(struct net *net, int family, int type, int protocol,
 	   deadlock in module load.
 	 */
 	if (family == PF_INET && type == SOCK_PACKET) {
-		static int warned;
-		if (!warned) {
-			warned = 1;
-			pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n",
-				current->comm);
-		}
+		pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n",
+			     current->comm);
 		family = PF_PACKET;
 	}
 
@@ -1874,7 +1871,8 @@ static int copy_msghdr_from_user(struct msghdr *kmsg,
 
 static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
 			 struct msghdr *msg_sys, unsigned int flags,
-			 struct used_address *used_address)
+			 struct used_address *used_address,
+			 unsigned int allowed_msghdr_flags)
 {
 	struct compat_msghdr __user *msg_compat =
 	    (struct compat_msghdr __user *)msg;
@@ -1900,6 +1898,7 @@ static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
 
 	if (msg_sys->msg_controllen > INT_MAX)
 		goto out_freeiov;
+	flags |= (msg_sys->msg_flags & allowed_msghdr_flags);
 	ctl_len = msg_sys->msg_controllen;
 	if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
 		err =
@@ -1978,7 +1977,7 @@ long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags)
 	if (!sock)
 		goto out;
 
-	err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL);
+	err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0);
 
 	fput_light(sock->file, fput_needed);
 out:
@@ -2005,6 +2004,7 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 	struct compat_mmsghdr __user *compat_entry;
 	struct msghdr msg_sys;
 	struct used_address used_address;
+	unsigned int oflags = flags;
 
 	if (vlen > UIO_MAXIOV)
 		vlen = UIO_MAXIOV;
@@ -2019,11 +2019,15 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 	entry = mmsg;
 	compat_entry = (struct compat_mmsghdr __user *)mmsg;
 	err = 0;
+	flags |= MSG_BATCH;
 
 	while (datagrams < vlen) {
+		if (datagrams == vlen - 1)
+			flags = oflags;
+
 		if (MSG_CMSG_COMPAT & flags) {
 			err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry,
-					     &msg_sys, flags, &used_address);
+					     &msg_sys, flags, &used_address, MSG_EOR);
 			if (err < 0)
 				break;
 			err = __put_user(err, &compat_entry->msg_len);
@@ -2031,7 +2035,7 @@ int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 		} else {
 			err = ___sys_sendmsg(sock,
 					     (struct user_msghdr __user *)entry,
-					     &msg_sys, flags, &used_address);
+					     &msg_sys, flags, &used_address, MSG_EOR);
 			if (err < 0)
 				break;
 			err = put_user(err, &entry->msg_len);
@@ -2240,31 +2244,31 @@ int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 		cond_resched();
 	}
 
-out_put:
-	fput_light(sock->file, fput_needed);
-
 	if (err == 0)
-		return datagrams;
+		goto out_put;
+
+	if (datagrams == 0) {
+		datagrams = err;
+		goto out_put;
+	}
 
-	if (datagrams != 0) {
+	/*
+	 * We may return less entries than requested (vlen) if the
+	 * sock is non block and there aren't enough datagrams...
+	 */
+	if (err != -EAGAIN) {
 		/*
-		 * We may return less entries than requested (vlen) if the
-		 * sock is non block and there aren't enough datagrams...
+		 * ... or  if recvmsg returns an error after we
+		 * received some datagrams, where we record the
+		 * error to return on the next call or if the
+		 * app asks about it using getsockopt(SO_ERROR).
 		 */
-		if (err != -EAGAIN) {
-			/*
-			 * ... or  if recvmsg returns an error after we
-			 * received some datagrams, where we record the
-			 * error to return on the next call or if the
-			 * app asks about it using getsockopt(SO_ERROR).
-			 */
-			sock->sk->sk_err = -err;
-		}
-
-		return datagrams;
+		sock->sk->sk_err = -err;
 	}
+out_put:
+	fput_light(sock->file, fput_needed);
 
-	return err;
+	return datagrams;
 }
 
 SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,