diff options
| author | John Fastabend <john.fastabend@gmail.com> | 2018-05-14 10:00:17 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-15 20:41:03 +0200 |
| commit | 81110384441a59cff47430f20f049e69b98c17f4 (patch) | |
| tree | 4c178876a42538fbefb50678562f9801a805d667 /include/linux/bpf.h | |
| parent | e5cd3abcb31a48d4ea91bd32f0618802ca5f3592 (diff) | |
bpf: sockmap, add hash map support
Sockmap is currently backed by an array and enforces keys to be
four bytes. This works well for many use cases and was originally
modeled after devmap which also uses four bytes keys. However,
this has become limiting in larger use cases where a hash would
be more appropriate. For example users may want to use the 5-tuple
of the socket as the lookup key.
To support this add hash support.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index a38e474bf7ee..ed0122b45b63 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -668,6 +668,7 @@ static inline void bpf_map_offload_map_free(struct bpf_map *map) #if defined(CONFIG_STREAM_PARSER) && defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_INET) struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key); +struct sock *__sock_hash_lookup_elem(struct bpf_map *map, void *key); int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type); #else static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key) @@ -675,6 +676,12 @@ static inline struct sock *__sock_map_lookup_elem(struct bpf_map *map, u32 key) return NULL; } +static inline struct sock *__sock_hash_lookup_elem(struct bpf_map *map, + void *key) +{ + return NULL; +} + static inline int sock_map_prog(struct bpf_map *map, struct bpf_prog *prog, u32 type) @@ -724,6 +731,7 @@ extern const struct bpf_func_proto bpf_get_current_comm_proto; extern const struct bpf_func_proto bpf_get_stackid_proto; extern const struct bpf_func_proto bpf_get_stack_proto; extern const struct bpf_func_proto bpf_sock_map_update_proto; +extern const struct bpf_func_proto bpf_sock_hash_update_proto; /* Shared helpers among cBPF and eBPF. */ void bpf_user_rnd_init_once(void); |