Commit bf5525f3 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller

selftests: net: tcp_mmap: clear whole tcp_zerocopy_receive struct

We added fields in tcp_zerocopy_receive structure,
so make sure to clear all fields to not pass garbage to the kernel.

We were lucky because recent additions added 'out' parameters,
still we need to clean our reference implementation, before folks
copy/paste it.

Fixes: c8856c05 ("tcp-zerocopy: Return inq along with tcp receive zerocopy.")
Fixes: 33946518 ("tcp-zerocopy: Return sk_err (if set) along with tcp receive zerocopy.")
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Cc: Arjun Roy <arjunroy@google.com>
Cc: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: default avatarSoheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 38212bb3
......@@ -165,9 +165,10 @@ void *child_thread(void *arg)
socklen_t zc_len = sizeof(zc);
int res;
memset(&zc, 0, sizeof(zc));
zc.address = (__u64)((unsigned long)addr);
zc.length = chunk_size;
zc.recv_skip_hint = 0;
res = getsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE,
&zc, &zc_len);
if (res == -1)
......
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