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| author | David S. Miller <davem@davemloft.net> | 2013-12-11 04:05:45 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-11 04:05:45 +0100 |
| commit | 42404c09151029689659818e2196ee2fd97142aa (patch) | |
| tree | 5257075d89de7df00796fd720724b219ff3f25bc /drivers/net/tun.c | |
| parent | net: more spelling fixes (diff) | |
| download | linux-42404c09151029689659818e2196ee2fd97142aa.tar.xz linux-42404c09151029689659818e2196ee2fd97142aa.zip | |
Revert "tun: remove useless codes in tun_chr_aio_read() and tun_recvmsg()"
This reverts commit 73713357ab58aacda1af715bb5a623528dbbfd79.
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>
Diffstat (limited to 'drivers/net/tun.c')
| -rw-r--r-- | drivers/net/tun.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index bbb693512918..3c5a8d8cde50 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -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; |