1 files changed, 30 insertions, 93 deletions

diff --git a/net/socket.c b/net/socket.c
index 418795caa897..bbedbfcb42c2 100644
--- 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
@@ -613,13 +613,6 @@ EXPORT_SYMBOL(__sock_tx_timestamp);
 static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock,
                                        struct msghdr *msg, size_t size)
 {
-        struct sock_iocb *si = kiocb_to_siocb(iocb);
-
-        si->sock = sock;
-        si->scm = NULL;
-        si->msg = msg;
-        si->size = size;
-
         return sock->ops->sendmsg(iocb, sock, msg, size);
 }
 
@@ -635,11 +628,9 @@ static int do_sock_sendmsg(struct socket *sock, struct msghdr *msg,
                            size_t size, bool nosec)
 {
         struct kiocb iocb;
-        struct sock_iocb siocb;
         int ret;
 
         init_sync_kiocb(&iocb, NULL);
-        iocb.private = &siocb;
         ret = nosec ? __sock_sendmsg_nosec(&iocb, sock, msg, size) :
                       __sock_sendmsg(&iocb, sock, msg, size);
         if (-EIOCBQUEUED == ret)
@@ -756,14 +747,6 @@ EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
 static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
                                        struct msghdr *msg, size_t size, int flags)
 {
-        struct sock_iocb *si = kiocb_to_siocb(iocb);
-
-        si->sock = sock;
-        si->scm = NULL;
-        si->msg = msg;
-        si->size = size;
-        si->flags = flags;
-
         return sock->ops->recvmsg(iocb, sock, msg, size, flags);
 }
 
@@ -779,11 +762,9 @@ int sock_recvmsg(struct socket *sock, struct msghdr *msg,
                  size_t size, int flags)
 {
         struct kiocb iocb;
-        struct sock_iocb siocb;
         int ret;
 
         init_sync_kiocb(&iocb, NULL);
-        iocb.private = &siocb;
         ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
         if (-EIOCBQUEUED == ret)
                 ret = wait_on_sync_kiocb(&iocb);
@@ -795,11 +776,9 @@ static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
                               size_t size, int flags)
 {
         struct kiocb iocb;
-        struct sock_iocb siocb;
         int ret;
 
         init_sync_kiocb(&iocb, NULL);
-        iocb.private = &siocb;
         ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
         if (-EIOCBQUEUED == ret)
                 ret = wait_on_sync_kiocb(&iocb);
@@ -866,89 +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 struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
-                                         struct sock_iocb *siocb)
-{
-        siocb->kiocb = iocb;
-        iocb->private = siocb;
-        return siocb;
-}
-
-static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
-                struct file *file, const struct iovec *iov,
-                unsigned long nr_segs)
+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;
-        size_t size = 0;
-        int i;
-
-        for (i = 0; i < nr_segs; i++)
-                size += iov[i].iov_len;
-
-        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, size);
-        msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
-
-        return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
-}
+        struct msghdr msg = {.msg_iter = *to};
+        ssize_t res;
 
-static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
-                                unsigned long nr_segs, loff_t pos)
-{
-        struct sock_iocb siocb, *x;
+        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;
 
-
-        x = alloc_sock_iocb(iocb, &siocb);
-        if (!x)
-                return -ENOMEM;
-        return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
+        res = __sock_recvmsg(iocb, sock, &msg,
+                             iocb->ki_nbytes, msg.msg_flags);
+        *to = msg.msg_iter;
+        return res;
 }
 
-static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
-                        struct file *file, const struct iovec *iov,
-                        unsigned long nr_segs)
+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;
-        size_t size = 0;
-        int i;
-
-        for (i = 0; i < nr_segs; i++)
-                size += iov[i].iov_len;
-
-        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, size);
-        msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
-        if (sock->type == SOCK_SEQPACKET)
-                msg->msg_flags |= MSG_EOR;
-
-        return __sock_sendmsg(iocb, sock, msg, size);
-}
+        struct msghdr msg = {.msg_iter = *from};
+        ssize_t res;
 
-static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
-                          unsigned long nr_segs, loff_t pos)
-{
-        struct sock_iocb siocb, *x;
-
-        if (pos != 0)
+        if (iocb->ki_pos != 0)
                 return -ESPIPE;
 
-        x = alloc_sock_iocb(iocb, &siocb);
-        if (!x)
-                return -ENOMEM;
+        if (file->f_flags & O_NONBLOCK)
+                msg.msg_flags = MSG_DONTWAIT;
+
+        if (sock->type == SOCK_SEQPACKET)
+                msg.msg_flags |= MSG_EOR;
 
-        return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
+        res = __sock_sendmsg(iocb, sock, &msg, iocb->ki_nbytes);
+        *from = msg.msg_iter;
+        return res;
 }
 
 /*