diff options
| author |   Daniel Borkmann <daniel@iogearbox.net> | 2017-06-11 00:50:47 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-06-10 19:05:47 -0400 |
| commit | ded092cd73c2c56a394b936f86897f29b2e131c0 (patch) | |
| tree | d8fc58484a521feb4eeb19bbb332e00148efe51e /tools | |
| parent | bpf: remove cg_skb_func_proto and use sk_filter_func_proto directly (diff) | |
| download | linux-dev-ded092cd73c2c56a394b936f86897f29b2e131c0.tar.xz linux-dev-ded092cd73c2c56a394b936f86897f29b2e131c0.zip | |
bpf: add bpf_set_hash helper for tc progs
Allow for tc BPF programs to set a skb->hash, apart from clearing
and triggering a recalc that we have right now. It allows for BPF
to implement a custom hashing routine for skb_get_hash().
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 9b2c10b45733..f94b48b168dc 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -513,6 +513,11 @@ union bpf_attr { * Get the owner uid of the socket stored inside sk_buff. * @skb: pointer to skb * Return: uid of the socket owner on success or overflowuid if failed. + * + * u32 bpf_set_hash(skb, hash) + * Set full skb->hash. + * @skb: pointer to skb + * @hash: hash to set */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -562,7 +567,8 @@ union bpf_attr { FN(xdp_adjust_head), \ FN(probe_read_str), \ FN(get_socket_cookie), \ - FN(get_socket_uid), + FN(get_socket_uid), \ + FN(set_hash), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call |