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samples/bpf: make map creation more verbose

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map creation is typically the first one to fail when rlimits are
too low, not enough memory, etc
Make this failure scenario more verbose

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2016-03-07 21:57:18 -08:00 committed by David S. Miller
parent 557c0c6e7d
commit 618ec9a7b1
1 changed files with 4 additions and 1 deletions
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5
samples/bpf/bpf_load.c
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@ -158,8 +158,11 @@ static int load_maps(struct bpf_map_def *maps, int len)
maps[i].key_size,
maps[i].value_size,
maps[i].max_entries);
if (map_fd[i] < 0)
if (map_fd[i] < 0) {
printf("failed to create a map: %d %s\n",
errno, strerror(errno));
return 1;
}
if (maps[i].type == BPF_MAP_TYPE_PROG_ARRAY)
prog_array_fd = map_fd[i];