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bpf: allow eBPF programs to use maps

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expose bpf_map_lookup_elem(), bpf_map_update_elem(), bpf_map_delete_elem()
map accessors to eBPF programs

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2014-11-13 17:36:49 -08:00 • committed by David S. Miller
commit d0003ec01c
4 changed files with 98 additions and 1 deletions
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3
include/uapi/linux/bpf.h
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@ -158,6 +158,9 @@ union bpf_attr {
*/
enum bpf_func_id {
BPF_FUNC_unspec,
BPF_FUNC_map_lookup_elem, /* void *map_lookup_elem(&map, &key) */
BPF_FUNC_map_update_elem, /* int map_update_elem(&map, &key, &value, flags) */
BPF_FUNC_map_delete_elem, /* int map_delete_elem(&map, &key) */
__BPF_FUNC_MAX_ID,
};