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selftests: bpf: fix compiler warning in flow_dissector test

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Add missing header file following compiler warning:

  prog_tests/flow_dissector.c: In function ‘tx_tap’:
  prog_tests/flow_dissector.c:175:9: warning: implicit declaration of function ‘writev’; did you mean ‘write’? [-Wimplicit-function-declaration]
    return writev(fd, iov, ARRAY_SIZE(iov));
           ^~~~~~
           write

Fixes: 0905beec9f ("selftests/bpf: run flow dissector tests in skb-less mode")
Signed-off-by: Alakesh Haloi <alakesh.haloi@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Alakesh Haloi 2019-05-28 19:02:18 +00:00 committed by Daniel Borkmann
parent 10b3c44131
commit 5fac1718e7
1 changed files with 1 additions and 0 deletions
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1
tools/testing/selftests/bpf/prog_tests/flow_dissector.c
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@ -3,6 +3,7 @@
#include <error.h>
#include <linux/if.h>
#include <linux/if_tun.h>
#include <sys/uio.h>
#define CHECK_FLOW_KEYS(desc, got, expected) \
CHECK_ATTR(memcmp(&got, &expected, sizeof(got)) != 0, \