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Commit 42404c09 authored by David S. Miller's avatar David S. Miller
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Revert "tun: remove useless codes in tun_chr_aio_read() and tun_recvmsg()" 



This reverts commit 73713357.

MSG_TRUNC handling was broken and is going to be fixed in
the 'net' tree, so revert this.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8e3bff96

drivers/net/tun.c

+5 −0
Original line number Diff line number Diff line
@@ -1354,6 +1354,7 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv, 


	ret = tun_do_read(tun, tfile, iv, len,

			  file->f_flags & O_NONBLOCK);

	ret = min_t(ssize_t, ret, len);

	if (ret > 0)

		iocb->ki_pos = ret;

out:
@@ -1454,6 +1455,10 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock, 
	}

	ret = tun_do_read(tun, tfile, m->msg_iov, total_len,

			  flags & MSG_DONTWAIT);

	if (ret > total_len) {

		m->msg_flags |= MSG_TRUNC;

		ret = flags & MSG_TRUNC ? ret : total_len;

	}

out:

	tun_put(tun);

	return ret;