[IPv6]: Export userland ND options through netlink (RDNSS support)

[safe/jmp/linux-2.6] / net / socket.c

diff --git a/net/socket.c b/net/socket.c
index 7d44453..379b3a3 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -84,6 +84,7 @@
 #include <linux/kmod.h>
 #include <linux/audit.h>
 #include <linux/wireless.h>
+#include <linux/nsproxy.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -777,9 +778,6 @@ static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
        if (pos != 0)
                return -ESPIPE;
 
-       if (iocb->ki_left == 0) /* Match SYS5 behaviour */
-               return 0;
-
        x = alloc_sock_iocb(iocb, &siocb);
        if (!x)
                return -ENOMEM;
@@ -793,9 +791,9 @@ static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
  */
 
 static DEFINE_MUTEX(br_ioctl_mutex);
-static int (*br_ioctl_hook) (unsigned int cmd, void __user *arg) = NULL;
+static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL;
 
-void brioctl_set(int (*hook) (unsigned int, void __user *))
+void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
 {
        mutex_lock(&br_ioctl_mutex);
        br_ioctl_hook = hook;
@@ -805,9 +803,9 @@ void brioctl_set(int (*hook) (unsigned int, void __user *))
 EXPORT_SYMBOL(brioctl_set);
 
 static DEFINE_MUTEX(vlan_ioctl_mutex);
-static int (*vlan_ioctl_hook) (void __user *arg);
+static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
 
-void vlan_ioctl_set(int (*hook) (void __user *))
+void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
 {
        mutex_lock(&vlan_ioctl_mutex);
        vlan_ioctl_hook = hook;
@@ -836,16 +834,20 @@ EXPORT_SYMBOL(dlci_ioctl_set);
 static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 {
        struct socket *sock;
+       struct sock *sk;
        void __user *argp = (void __user *)arg;
        int pid, err;
+       struct net *net;
 
        sock = file->private_data;
+       sk = sock->sk;
+       net = sk->sk_net;
        if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
-               err = dev_ioctl(cmd, argp);
+               err = dev_ioctl(net, cmd, argp);
        } else
 #ifdef CONFIG_WIRELESS_EXT
        if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
-               err = dev_ioctl(cmd, argp);
+               err = dev_ioctl(net, cmd, argp);
        } else
 #endif                         /* CONFIG_WIRELESS_EXT */
                switch (cmd) {
@@ -871,7 +873,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 
                        mutex_lock(&br_ioctl_mutex);
                        if (br_ioctl_hook)
-                               err = br_ioctl_hook(cmd, argp);
+                               err = br_ioctl_hook(net, cmd, argp);
                        mutex_unlock(&br_ioctl_mutex);
                        break;
                case SIOCGIFVLAN:
@@ -882,7 +884,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 
                        mutex_lock(&vlan_ioctl_mutex);
                        if (vlan_ioctl_hook)
-                               err = vlan_ioctl_hook(argp);
+                               err = vlan_ioctl_hook(net, argp);
                        mutex_unlock(&vlan_ioctl_mutex);
                        break;
                case SIOCADDDLCI:
@@ -905,7 +907,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
                         * to the NIC driver.
                         */
                        if (err == -ENOIOCTLCMD)
-                               err = dev_ioctl(cmd, argp);
+                               err = dev_ioctl(net, cmd, argp);
                        break;
                }
        return err;
@@ -1074,7 +1076,7 @@ call_kill:
        return 0;
 }
 
-static int __sock_create(int family, int type, int protocol,
+static int __sock_create(struct net *net, int family, int type, int protocol,
                         struct socket **res, int kern)
 {
        int err;
@@ -1150,7 +1152,7 @@ static int __sock_create(int family, int type, int protocol,
        /* Now protected by module ref count */
        rcu_read_unlock();
 
-       err = pf->create(sock, protocol);
+       err = pf->create(net, sock, protocol);
        if (err < 0)
                goto out_module_put;
 
@@ -1189,12 +1191,12 @@ out_release:
 
 int sock_create(int family, int type, int protocol, struct socket **res)
 {
-       return __sock_create(family, type, protocol, res, 0);
+       return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
 }
 
 int sock_create_kern(int family, int type, int protocol, struct socket **res)
 {
-       return __sock_create(family, type, protocol, res, 1);
+       return __sock_create(&init_net, family, type, protocol, res, 1);
 }
 
 asmlinkage long sys_socket(int family, int type, int protocol)
@@ -1927,7 +1929,7 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
         *      kernel msghdr to use the kernel address space)
         */
 
-       uaddr = (void __user *)msg_sys.msg_name;
+       uaddr = (__force void __user *)msg_sys.msg_name;
        uaddr_len = COMPAT_NAMELEN(msg);
        if (MSG_CMSG_COMPAT & flags) {
                err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
@@ -2233,6 +2235,7 @@ int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
        err = sock->ops->accept(sock, *newsock, flags);
        if (err < 0) {
                sock_release(*newsock);
+               *newsock = NULL;
                goto done;
        }