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author | Alexei Starovoitov <ast@plumgrid.com> | 2014-09-26 00:16:57 -0700 |
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committer | David S. Miller <davem@davemloft.net> | 2014-09-26 15:05:14 -0400 |
commit | 99c55f7d47c0dc6fc64729f37bf435abf43f4c60 (patch) | |
tree | 12f09f26bee9813ae33cfc195582c41e94b2e4e9 /kernel/bpf/Makefile | |
parent | 4a8e320c929991c9480a7b936512c57ea02d87b2 (diff) | |
download | linux-99c55f7d47c0dc6fc64729f37bf435abf43f4c60.tar.gz linux-99c55f7d47c0dc6fc64729f37bf435abf43f4c60.tar.bz2 linux-99c55f7d47c0dc6fc64729f37bf435abf43f4c60.zip |
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>
Diffstat (limited to 'kernel/bpf/Makefile')
-rw-r--r-- | kernel/bpf/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile index 6a71145e2769..e9f7334ed07a 100644 --- a/kernel/bpf/Makefile +++ b/kernel/bpf/Makefile @@ -1 +1 @@ -obj-y := core.o +obj-y := core.o syscall.o |