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Revert "macvtap: remove useless codes in macvtap_aio_read() and macvtap_recvmsg()" 

This reverts commit 41e4af69a5.

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

Signed-off-by: David S. Miller <davem@davemloft.net>
wifi-calibration
David S. Miller 2013-12-10 22:06:18 -05:00
parent 42404c0915
commit de2aa4760b
1 changed files with 5 additions and 0 deletions
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5
drivers/net/macvtap.c
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@ -871,6 +871,7 @@ static ssize_t macvtap_aio_read(struct kiocb *iocb, const struct iovec *iv,
}
ret = macvtap_do_read(q, iv, len, file->f_flags & O_NONBLOCK);
ret = min_t(ssize_t, ret, len); /* XXX copied from tun.c. Why? */
if (ret > 0)
iocb->ki_pos = ret;
out:
@ -1105,6 +1106,10 @@ static int macvtap_recvmsg(struct kiocb *iocb, struct socket *sock,
return -EINVAL;
ret = macvtap_do_read(q, m->msg_iov, total_len,
flags & MSG_DONTWAIT);
if (ret > total_len) {
m->msg_flags |= MSG_TRUNC;
ret = flags & MSG_TRUNC ? ret : total_len;
}
return ret;
}