xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf: Add syscall lookup support for fd array and htab

Browse Source 
This patch allows userspace to do BPF_MAP_LOOKUP_ELEM on
BPF_MAP_TYPE_PROG_ARRAY,
BPF_MAP_TYPE_ARRAY_OF_MAPS and
BPF_MAP_TYPE_HASH_OF_MAPS.

The lookup returns a prog-id or map-id to the userspace.
The userspace can then use the BPF_PROG_GET_FD_BY_ID
or BPF_MAP_GET_FD_BY_ID to get a fd.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau
2017-06-27 23:08:34 -07:00
committed by David S. Miller
parent 77b0d36177
commit 14dc6f04f4
6 changed files with 70 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
kernel/bpf/map_in_map.h
View File

@@ -19,5 +19,6 @@ bool bpf_map_meta_equal(const struct bpf_map *meta0,
void *bpf_map_fd_get_ptr(struct bpf_map *map, struct file *map_file,
int ufd);
void bpf_map_fd_put_ptr(void *ptr);
u32 bpf_map_fd_sys_lookup_elem(void *ptr);
#endif