net: switch sockets to ->read_iter/->write_iter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/net/socket.c b/net/socket.c
index 4d08b50cad659115909cf246279af9be01b80c3e..bbedbfcb42c2505fceb57fa058f262d90e1670ed 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -113,10 +113,8 @@ unsigned int sysctl_net_busy_read __read_mostly;
 unsigned int sysctl_net_busy_poll __read_mostly;
 #endif
 
-static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
-                        unsigned long nr_segs, loff_t pos);
-static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
-                         unsigned long nr_segs, loff_t pos);
+static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to);
+static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from);
 static int sock_mmap(struct file *file, struct vm_area_struct *vma);
 
 static int sock_close(struct inode *inode, struct file *file);
@@ -142,8 +140,10 @@ static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
 static const struct file_operations socket_file_ops = {
        .owner =        THIS_MODULE,
        .llseek =       no_llseek,
-       .aio_read =     sock_aio_read,
-       .aio_write =    sock_aio_write,
+       .read =         new_sync_read,
+       .write =        new_sync_write,
+       .read_iter =    sock_read_iter,
+       .write_iter =   sock_write_iter,
        .poll =         sock_poll,
        .unlocked_ioctl = sock_ioctl,
 #ifdef CONFIG_COMPAT
@@ -845,49 +845,47 @@ static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
        return sock->ops->splice_read(sock, ppos, pipe, len, flags);
 }
 
-static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
-                               unsigned long nr_segs, loff_t pos)
+static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
        struct file *file = iocb->ki_filp;
        struct socket *sock = file->private_data;
-       struct msghdr msg;
+       struct msghdr msg = {.msg_iter = *to};
+       ssize_t res;
+
+       if (file->f_flags & O_NONBLOCK)
+               msg.msg_flags = MSG_DONTWAIT;
 
-       if (pos != 0)
+       if (iocb->ki_pos != 0)
                return -ESPIPE;
 
        if (iocb->ki_nbytes == 0)       /* Match SYS5 behaviour */
                return 0;
 
-       msg.msg_name = NULL;
-       msg.msg_namelen = 0;
-       msg.msg_control = NULL;
-       msg.msg_controllen = 0;
-       iov_iter_init(&msg.msg_iter, READ, iov, nr_segs, iocb->ki_nbytes);
-       msg.msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
-
-       return __sock_recvmsg(iocb, sock, &msg, iocb->ki_nbytes, msg.msg_flags);
+       res = __sock_recvmsg(iocb, sock, &msg,
+                            iocb->ki_nbytes, msg.msg_flags);
+       *to = msg.msg_iter;
+       return res;
 }
 
-static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
-                         unsigned long nr_segs, loff_t pos)
+static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
        struct file *file = iocb->ki_filp;
        struct socket *sock = file->private_data;
-       struct msghdr msg;
+       struct msghdr msg = {.msg_iter = *from};
+       ssize_t res;
 
-       if (pos != 0)
+       if (iocb->ki_pos != 0)
                return -ESPIPE;
 
-       msg.msg_name = NULL;
-       msg.msg_namelen = 0;
-       msg.msg_control = NULL;
-       msg.msg_controllen = 0;
-       iov_iter_init(&msg.msg_iter, WRITE, iov, nr_segs, iocb->ki_nbytes);
-       msg.msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
+       if (file->f_flags & O_NONBLOCK)
+               msg.msg_flags = MSG_DONTWAIT;
+
        if (sock->type == SOCK_SEQPACKET)
                msg.msg_flags |= MSG_EOR;
 
-       return __sock_sendmsg(iocb, sock, &msg, iocb->ki_nbytes);
+       res = __sock_sendmsg(iocb, sock, &msg, iocb->ki_nbytes);
+       *from = msg.msg_iter;
+       return res;
 }
 
 /*