samples/bpf: make map creation more verbose
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>
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@ -158,8 +158,11 @@ static int load_maps(struct bpf_map_def *maps, int len)
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maps[i].key_size,
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maps[i].key_size,
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maps[i].value_size,
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maps[i].value_size,
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maps[i].max_entries);
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maps[i].max_entries);
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if (map_fd[i] < 0)
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if (map_fd[i] < 0) {
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printf("failed to create a map: %d %s\n",
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errno, strerror(errno));
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return 1;
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return 1;
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}
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if (maps[i].type == BPF_MAP_TYPE_PROG_ARRAY)
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if (maps[i].type == BPF_MAP_TYPE_PROG_ARRAY)
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prog_array_fd = map_fd[i];
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prog_array_fd = map_fd[i];
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