diff options
| -rw-r--r-- | net/socket.c | 224 |
1 files changed, 110 insertions, 114 deletions
diff --git a/net/socket.c b/net/socket.c index f40957adc7c7..0dde6dade2b1 100644 --- a/net/socket.c +++ b/net/socket.c @@ -640,154 +640,150 @@ static void sock_aio_dtor(struct kiocb *iocb) kfree(iocb->private); } -/* - * Read data from a socket. ubuf is a user mode pointer. We make sure the user - * area ubuf...ubuf+size-1 is writable before asking the protocol. - */ - -static ssize_t sock_aio_read(struct kiocb *iocb, char __user *ubuf, - size_t size, loff_t pos) +static ssize_t sock_sendpage(struct file *file, struct page *page, + int offset, size_t size, loff_t *ppos, int more) { - struct sock_iocb *x, siocb; struct socket *sock; int flags; - if (pos != 0) - return -ESPIPE; - if (size==0) /* Match SYS5 behaviour */ - return 0; + sock = file->private_data; - if (is_sync_kiocb(iocb)) - x = &siocb; - else { - x = kmalloc(sizeof(struct sock_iocb), GFP_KERNEL); - if (!x) - return -ENOMEM; + flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; + if (more) + flags |= MSG_MORE; + + return sock->ops->sendpage(sock, page, offset, size, flags); +} + +static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, + char __user *ubuf, size_t size, struct sock_iocb *siocb) +{ + if (!is_sync_kiocb(iocb)) { + siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); + if (!siocb) + return NULL; iocb->ki_dtor = sock_aio_dtor; } - iocb->private = x; - x->kiocb = iocb; - sock = iocb->ki_filp->private_data; - x->async_msg.msg_name = NULL; - x->async_msg.msg_namelen = 0; - x->async_msg.msg_iov = &x->async_iov; - x->async_msg.msg_iovlen = 1; - x->async_msg.msg_control = NULL; - x->async_msg.msg_controllen = 0; - x->async_iov.iov_base = ubuf; - x->async_iov.iov_len = size; - flags = !(iocb->ki_filp->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; + siocb->kiocb = iocb; + siocb->async_iov.iov_base = ubuf; + siocb->async_iov.iov_len = size; - return __sock_recvmsg(iocb, sock, &x->async_msg, size, flags); + iocb->private = siocb; + return siocb; } +static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, + struct file *file, struct iovec *iov, unsigned long nr_segs) +{ + struct socket *sock = file->private_data; + size_t size = 0; + int i; -/* - * Write data to a socket. We verify that the user area ubuf..ubuf+size-1 - * is readable by the user process. - */ + for (i = 0 ; i < nr_segs ; i++) + size += iov[i].iov_len; -static ssize_t sock_aio_write(struct kiocb *iocb, const char __user *ubuf, - size_t size, loff_t pos) + msg->msg_name = NULL; + msg->msg_namelen = 0; + msg->msg_control = NULL; + msg->msg_controllen = 0; + msg->msg_iov = (struct iovec *) iov; + msg->msg_iovlen = nr_segs; + msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; + + return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); +} + +static ssize_t sock_readv(struct file *file, const struct iovec *iov, + unsigned long nr_segs, loff_t *ppos) { - struct sock_iocb *x, siocb; - struct socket *sock; - + struct kiocb iocb; + struct sock_iocb siocb; + struct msghdr msg; + int ret; + + init_sync_kiocb(&iocb, NULL); + iocb.private = &siocb; + + ret = do_sock_read(&msg, &iocb, file, (struct iovec *)iov, nr_segs); + if (-EIOCBQUEUED == ret) + ret = wait_on_sync_kiocb(&iocb); + return ret; +} + +static ssize_t sock_aio_read(struct kiocb *iocb, char __user *ubuf, + size_t count, loff_t pos) +{ + struct sock_iocb siocb, *x; + if (pos != 0) return -ESPIPE; - if(size==0) /* Match SYS5 behaviour */ + if (count == 0) /* Match SYS5 behaviour */ return 0; - if (is_sync_kiocb(iocb)) - x = &siocb; - else { - x = kmalloc(sizeof(struct sock_iocb), GFP_KERNEL); - if (!x) - return -ENOMEM; - iocb->ki_dtor = sock_aio_dtor; - } - iocb->private = x; - x->kiocb = iocb; - sock = iocb->ki_filp->private_data; - - x->async_msg.msg_name = NULL; - x->async_msg.msg_namelen = 0; - x->async_msg.msg_iov = &x->async_iov; - x->async_msg.msg_iovlen = 1; - x->async_msg.msg_control = NULL; - x->async_msg.msg_controllen = 0; - x->async_msg.msg_flags = !(iocb->ki_filp->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; - if (sock->type == SOCK_SEQPACKET) - x->async_msg.msg_flags |= MSG_EOR; - x->async_iov.iov_base = (void __user *)ubuf; - x->async_iov.iov_len = size; - - return __sock_sendmsg(iocb, sock, &x->async_msg, size); + x = alloc_sock_iocb(iocb, ubuf, count, &siocb); + if (!x) + return -ENOMEM; + return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, + &x->async_iov, 1); } -static ssize_t sock_sendpage(struct file *file, struct page *page, - int offset, size_t size, loff_t *ppos, int more) +static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, + struct file *file, struct iovec *iov, unsigned long nr_segs) { - struct socket *sock; - int flags; + struct socket *sock = file->private_data; + size_t size = 0; + int i; - sock = file->private_data; + for (i = 0 ; i < nr_segs ; i++) + size += iov[i].iov_len; - flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; - if (more) - flags |= MSG_MORE; + msg->msg_name = NULL; + msg->msg_namelen = 0; + msg->msg_control = NULL; + msg->msg_controllen = 0; + msg->msg_iov = (struct iovec *) iov; + msg->msg_iovlen = nr_segs; + msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; + if (sock->type == SOCK_SEQPACKET) + msg->msg_flags |= MSG_EOR; - return sock->ops->sendpage(sock, page, offset, size, flags); + return __sock_sendmsg(iocb, sock, msg, size); } -static int sock_readv_writev(int type, - struct file * file, const struct iovec * iov, - long count, size_t size) +static ssize_t sock_writev(struct file *file, const struct iovec *iov, + unsigned long nr_segs, loff_t *ppos) { struct msghdr msg; - struct socket *sock; + struct kiocb iocb; + struct sock_iocb siocb; + int ret; - sock = file->private_data; + init_sync_kiocb(&iocb, NULL); + iocb.private = &siocb; - msg.msg_name = NULL; - msg.msg_namelen = 0; - msg.msg_control = NULL; - msg.msg_controllen = 0; - msg.msg_iov = (struct iovec *) iov; - msg.msg_iovlen = count; - msg.msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; + ret = do_sock_write(&msg, &iocb, file, (struct iovec *)iov, nr_segs); + if (-EIOCBQUEUED == ret) + ret = wait_on_sync_kiocb(&iocb); + return ret; +} - /* read() does a VERIFY_WRITE */ - if (type == VERIFY_WRITE) - return sock_recvmsg(sock, &msg, size, msg.msg_flags); +static ssize_t sock_aio_write(struct kiocb *iocb, const char __user *ubuf, + size_t count, loff_t pos) +{ + struct sock_iocb siocb, *x; - if (sock->type == SOCK_SEQPACKET) - msg.msg_flags |= MSG_EOR; + if (pos != 0) + return -ESPIPE; + if (count == 0) /* Match SYS5 behaviour */ + return 0; - return sock_sendmsg(sock, &msg, size); -} + x = alloc_sock_iocb(iocb, (void __user *)ubuf, count, &siocb); + if (!x) + return -ENOMEM; -static ssize_t sock_readv(struct file *file, const struct iovec *vector, - unsigned long count, loff_t *ppos) -{ - size_t tot_len = 0; - int i; - for (i = 0 ; i < count ; i++) - tot_len += vector[i].iov_len; - return sock_readv_writev(VERIFY_WRITE, - file, vector, count, tot_len); -} - -static ssize_t sock_writev(struct file *file, const struct iovec *vector, - unsigned long count, loff_t *ppos) -{ - size_t tot_len = 0; - int i; - for (i = 0 ; i < count ; i++) - tot_len += vector[i].iov_len; - return sock_readv_writev(VERIFY_READ, - file, vector, count, tot_len); + return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, + &x->async_iov, 1); } |