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Revert "tun: remove useless codes in tun_chr_aio_read() and tun_recvmsg()" 

This reverts commit 73713357ab.

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>
This commit is contained in:
David S. Miller 2013-12-10 22:05:45 -05:00
parent 8e3bff96af
commit 42404c0915
1 changed files with 5 additions and 0 deletions
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5
drivers/net/tun.c
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@ -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, ret = tun_do_read(tun, tfile, iv, len,
file->f_flags & O_NONBLOCK); file->f_flags & O_NONBLOCK);
ret = min_t(ssize_t, ret, len);
if (ret > 0) if (ret > 0)
iocb->ki_pos = ret; iocb->ki_pos = ret;
out: 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, ret = tun_do_read(tun, tfile, m->msg_iov, total_len,
flags & MSG_DONTWAIT); flags & MSG_DONTWAIT);
if (ret > total_len) {
m->msg_flags |= MSG_TRUNC;
ret = flags & MSG_TRUNC ? ret : total_len;
}
out: out:
tun_put(tun); tun_put(tun);
return ret; return ret;