Alexei Starovoitov 99c55f7d47 bpf: introduce BPF syscall and maps ... BPF syscall is a multiplexor for a range of different operations on eBPF. This patch introduces syscall with single command to create a map. Next patch adds commands to access maps. 'maps' is a generic storage of different types for sharing data between kernel and userspace. Userspace example: /* this syscall wrapper creates a map with given type and attributes * and returns map_fd on success. * use close(map_fd) to delete the map */ int bpf_create_map(enum bpf_map_type map_type, int key_size, int value_size, int max_entries) { union bpf_attr attr = { .map_type = map_type, .key_size = key_size, .value_size = value_size, .max_entries = max_entries }; return bpf(BPF_MAP_CREATE, &attr, sizeof(attr)); } 'union bpf_attr' is backwards compatible with future extensions. More details in Documentation/networking/filter.txt and in manpage Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-09-26 15:05:14 -04:00
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core.c	net: bpf: only build bpf_jit_binary_{alloc, free}() when jit selected	2014-09-10 14:05:07 -07:00
Makefile	bpf: introduce BPF syscall and maps	2014-09-26 15:05:14 -04:00
syscall.c	bpf: introduce BPF syscall and maps	2014-09-26 15:05:14 -04:00