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tools lib bpf: Add flags to bpf_create_map()

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Commit 6c90598174 ("bpf: pre-allocate hash map elements") introduces
map_flags to bpf_attr for BPF_MAP_CREATE command. Expose this new
parameter in libbpf.

By exposing it, users can access flags such as whether or not to
preallocate the map.

Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Link: http://lkml.kernel.org/r/20161209024620.31660-4-joe@ovn.org
[ Added clarifying comment made by Wang Nan ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Joe Stringer
2016-12-08 18:46:16 -08:00
committed by Arnaldo Carvalho de Melo
parent 83d994d02b
commit a5580c7f7a
3 changed files with 5 additions and 3 deletions
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3
tools/lib/bpf/bpf.c
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@@ -54,7 +54,7 @@ static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
}
int bpf_create_map(enum bpf_map_type map_type, int key_size,
int value_size, int max_entries)
int value_size, int max_entries, __u32 map_flags)
{
union bpf_attr attr;
@@ -64,6 +64,7 @@ int bpf_create_map(enum bpf_map_type map_type, int key_size,
attr.key_size = key_size;
attr.value_size = value_size;
attr.max_entries = max_entries;
attr.map_flags = map_flags;
return sys_bpf(BPF_MAP_CREATE, &attr, sizeof(attr));
}