return __sys_listen(fd, backlog);
}
-/*
- * For accept, we attempt to create a new socket, set up the link
- * with the client, wake up the client, then return the new
- * connected fd. We collect the address of the connector in kernel
- * space and move it to user at the very end. This is unclean because
- * we open the socket then return an error.
- *
- * 1003.1g adds the ability to recvmsg() to query connection pending
- * status to recvmsg. We need to add that support in a way thats
- * clean when we restructure accept also.
- */
-
-int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
- int __user *upeer_addrlen, int flags)
+int __sys_accept4_file(struct file *file, unsigned file_flags,
+ struct sockaddr __user *upeer_sockaddr,
+ int __user *upeer_addrlen, int flags)
{
struct socket *sock, *newsock;
struct file *newfile;
- int err, len, newfd, fput_needed;
+ int err, len, newfd;
struct sockaddr_storage address;
if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sock_from_file(file, &err);
if (!sock)
goto out;
err = -ENFILE;
newsock = sock_alloc();
if (!newsock)
- goto out_put;
+ goto out;
newsock->type = sock->type;
newsock->ops = sock->ops;
if (unlikely(newfd < 0)) {
err = newfd;
sock_release(newsock);
- goto out_put;
+ goto out;
}
newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name);
if (IS_ERR(newfile)) {
err = PTR_ERR(newfile);
put_unused_fd(newfd);
- goto out_put;
+ goto out;
}
err = security_socket_accept(sock, newsock);
if (err)
goto out_fd;
- err = sock->ops->accept(sock, newsock, sock->file->f_flags, false);
+ err = sock->ops->accept(sock, newsock, sock->file->f_flags | file_flags,
+ false);
if (err < 0)
goto out_fd;
fd_install(newfd, newfile);
err = newfd;
-
-out_put:
- fput_light(sock->file, fput_needed);
out:
return err;
out_fd:
fput(newfile);
put_unused_fd(newfd);
- goto out_put;
+ goto out;
+
+}
+
+/*
+ * For accept, we attempt to create a new socket, set up the link
+ * with the client, wake up the client, then return the new
+ * connected fd. We collect the address of the connector in kernel
+ * space and move it to user at the very end. This is unclean because
+ * we open the socket then return an error.
+ *
+ * 1003.1g adds the ability to recvmsg() to query connection pending
+ * status to recvmsg. We need to add that support in a way thats
+ * clean when we restructure accept also.
+ */
+
+int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr,
+ int __user *upeer_addrlen, int flags)
+{
+ int ret = -EBADF;
+ struct fd f;
+
+ f = fdget(fd);
+ if (f.file) {
+ ret = __sys_accept4_file(f.file, 0, upeer_sockaddr,
+ upeer_addrlen, flags);
+ if (f.flags)
+ fput(f.file);
+ }
+
+ return ret;
}
SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
* include the -EINPROGRESS status for such sockets.
*/
-int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen)
+int __sys_connect_file(struct file *file, struct sockaddr __user *uservaddr,
+ int addrlen, int file_flags)
{
struct socket *sock;
struct sockaddr_storage address;
- int err, fput_needed;
+ int err;
- sock = sockfd_lookup_light(fd, &err, &fput_needed);
+ sock = sock_from_file(file, &err);
if (!sock)
goto out;
err = move_addr_to_kernel(uservaddr, addrlen, &address);
if (err < 0)
- goto out_put;
+ goto out;
err =
security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
if (err)
- goto out_put;
+ goto out;
err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
- sock->file->f_flags);
-out_put:
- fput_light(sock->file, fput_needed);
+ sock->file->f_flags | file_flags);
out:
return err;
}
+int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen)
+{
+ int ret = -EBADF;
+ struct fd f;
+
+ f = fdget(fd);
+ if (f.file) {
+ ret = __sys_connect_file(f.file, uservaddr, addrlen, 0);
+ if (f.flags)
+ fput(f.file);
+ }
+
+ return ret;
+}
+
SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
int, addrlen)
{
return err < 0 ? err : 0;
}
-static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
- struct msghdr *msg_sys, unsigned int flags,
- struct used_address *used_address,
- unsigned int allowed_msghdr_flags)
+static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys,
+ unsigned int flags, struct used_address *used_address,
+ unsigned int allowed_msghdr_flags)
{
- struct compat_msghdr __user *msg_compat =
- (struct compat_msghdr __user *)msg;
- struct sockaddr_storage address;
- struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
unsigned char ctl[sizeof(struct cmsghdr) + 20]
__aligned(sizeof(__kernel_size_t));
/* 20 is size of ipv6_pktinfo */
int ctl_len;
ssize_t err;
- msg_sys->msg_name = &address;
-
- if (MSG_CMSG_COMPAT & flags)
- err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov);
- else
- err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov);
- if (err < 0)
- return err;
-
err = -ENOBUFS;
if (msg_sys->msg_controllen > INT_MAX)
- goto out_freeiov;
+ goto out;
flags |= (msg_sys->msg_flags & allowed_msghdr_flags);
ctl_len = msg_sys->msg_controllen;
if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl,
sizeof(ctl));
if (err)
- goto out_freeiov;
+ goto out;
ctl_buf = msg_sys->msg_control;
ctl_len = msg_sys->msg_controllen;
} else if (ctl_len) {
if (ctl_len > sizeof(ctl)) {
ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
if (ctl_buf == NULL)
- goto out_freeiov;
+ goto out;
}
err = -EFAULT;
/*
out_freectl:
if (ctl_buf != ctl)
sock_kfree_s(sock->sk, ctl_buf, ctl_len);
-out_freeiov:
+out:
+ return err;
+}
+
+static int sendmsg_copy_msghdr(struct msghdr *msg,
+ struct user_msghdr __user *umsg, unsigned flags,
+ struct iovec **iov)
+{
+ int err;
+
+ if (flags & MSG_CMSG_COMPAT) {
+ struct compat_msghdr __user *msg_compat;
+
+ msg_compat = (struct compat_msghdr __user *) umsg;
+ err = get_compat_msghdr(msg, msg_compat, NULL, iov);
+ } else {
+ err = copy_msghdr_from_user(msg, umsg, NULL, iov);
+ }
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
+ struct msghdr *msg_sys, unsigned int flags,
+ struct used_address *used_address,
+ unsigned int allowed_msghdr_flags)
+{
+ struct sockaddr_storage address;
+ struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
+ ssize_t err;
+
+ msg_sys->msg_name = &address;
+
+ err = sendmsg_copy_msghdr(msg_sys, msg, flags, &iov);
+ if (err < 0)
+ return err;
+
+ err = ____sys_sendmsg(sock, msg_sys, flags, used_address,
+ allowed_msghdr_flags);
kfree(iov);
return err;
}
/*
* BSD sendmsg interface
*/
-long __sys_sendmsg_sock(struct socket *sock, struct user_msghdr __user *msg,
+long __sys_sendmsg_sock(struct socket *sock, struct user_msghdr __user *umsg,
unsigned int flags)
{
- struct msghdr msg_sys;
+ struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
+ struct sockaddr_storage address;
+ struct msghdr msg = { .msg_name = &address };
+ ssize_t err;
+
+ err = sendmsg_copy_msghdr(&msg, umsg, flags, &iov);
+ if (err)
+ return err;
+ /* disallow ancillary data requests from this path */
+ if (msg.msg_control || msg.msg_controllen) {
+ err = -EINVAL;
+ goto out;
+ }
- return ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0);
+ err = ____sys_sendmsg(sock, &msg, flags, NULL, 0);
+out:
+ kfree(iov);
+ return err;
}
long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
return __sys_sendmmsg(fd, mmsg, vlen, flags, true);
}
-static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
- struct msghdr *msg_sys, unsigned int flags, int nosec)
+static int recvmsg_copy_msghdr(struct msghdr *msg,
+ struct user_msghdr __user *umsg, unsigned flags,
+ struct sockaddr __user **uaddr,
+ struct iovec **iov)
{
- struct compat_msghdr __user *msg_compat =
- (struct compat_msghdr __user *)msg;
- struct iovec iovstack[UIO_FASTIOV];
- struct iovec *iov = iovstack;
- unsigned long cmsg_ptr;
- int len;
ssize_t err;
- /* kernel mode address */
- struct sockaddr_storage addr;
+ if (MSG_CMSG_COMPAT & flags) {
+ struct compat_msghdr __user *msg_compat;
- /* user mode address pointers */
- struct sockaddr __user *uaddr;
- int __user *uaddr_len = COMPAT_NAMELEN(msg);
-
- msg_sys->msg_name = &addr;
-
- if (MSG_CMSG_COMPAT & flags)
- err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov);
- else
- err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov);
+ msg_compat = (struct compat_msghdr __user *) umsg;
+ err = get_compat_msghdr(msg, msg_compat, uaddr, iov);
+ } else {
+ err = copy_msghdr_from_user(msg, umsg, uaddr, iov);
+ }
if (err < 0)
return err;
+ return 0;
+}
+
+static int ____sys_recvmsg(struct socket *sock, struct msghdr *msg_sys,
+ struct user_msghdr __user *msg,
+ struct sockaddr __user *uaddr,
+ unsigned int flags, int nosec)
+{
+ struct compat_msghdr __user *msg_compat =
+ (struct compat_msghdr __user *) msg;
+ int __user *uaddr_len = COMPAT_NAMELEN(msg);
+ struct sockaddr_storage addr;
+ unsigned long cmsg_ptr;
+ int len;
+ ssize_t err;
+
+ msg_sys->msg_name = &addr;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags);
if (err < 0)
- goto out_freeiov;
+ goto out;
len = err;
if (uaddr != NULL) {
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
- goto out_freeiov;
+ goto out;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
- goto out_freeiov;
+ goto out;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
- goto out_freeiov;
+ goto out;
err = len;
+out:
+ return err;
+}
+
+static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
+ struct msghdr *msg_sys, unsigned int flags, int nosec)
+{
+ struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
+ /* user mode address pointers */
+ struct sockaddr __user *uaddr;
+ ssize_t err;
-out_freeiov:
+ err = recvmsg_copy_msghdr(msg_sys, msg, flags, &uaddr, &iov);
+ if (err < 0)
+ return err;
+
+ err = ____sys_recvmsg(sock, msg_sys, msg, uaddr, flags, nosec);
kfree(iov);
return err;
}
* BSD recvmsg interface
*/
-long __sys_recvmsg_sock(struct socket *sock, struct user_msghdr __user *msg,
+long __sys_recvmsg_sock(struct socket *sock, struct user_msghdr __user *umsg,
unsigned int flags)
{
- struct msghdr msg_sys;
+ struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
+ struct sockaddr_storage address;
+ struct msghdr msg = { .msg_name = &address };
+ struct sockaddr __user *uaddr;
+ ssize_t err;
- return ___sys_recvmsg(sock, msg, &msg_sys, flags, 0);
+ err = recvmsg_copy_msghdr(&msg, umsg, flags, &uaddr, &iov);
+ if (err)
+ return err;
+ /* disallow ancillary data requests from this path */
+ if (msg.msg_control || msg.msg_controllen) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = ____sys_recvmsg(sock, &msg, umsg, uaddr, flags, 0);
+out:
+ kfree(iov);
+ return err;
}
long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags,
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