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socket: use ki_nbytes instead of iov_length() 

This field already contains the length of the iovec, no need to calculate it
again.

Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nicolas Dichtel 2015-01-16 14:35:09 +01:00 committed by David S. Miller
parent 7b68b2f714
commit 66c1a12c65
1 changed files with 4 additions and 6 deletions
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10
net/socket.c
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@ -882,16 +882,15 @@ static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
unsigned long nr_segs)
{
struct socket *sock = file->private_data;
size_t size = iov_length(iov, nr_segs);
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);
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, size, msg->msg_flags);
return __sock_recvmsg(iocb, sock, msg, iocb->ki_nbytes, msg->msg_flags);
}
static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
@ -917,18 +916,17 @@ static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
unsigned long nr_segs)
{
struct socket *sock = file->private_data;
size_t size = iov_length(iov, nr_segs);
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);
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 (sock->type == SOCK_SEQPACKET)
msg->msg_flags |= MSG_EOR;
return __sock_sendmsg(iocb, sock, msg, size);
return __sock_sendmsg(iocb, sock, msg, iocb->ki_nbytes);
}
static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,