diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-04 01:08:24 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-05-03 16:49:20 -0700 |
| commit | 32b3652c307ef62f624182fac1fd6328ccc8fcbe (patch) | |
| tree | 92221b6309ccd5c231dde62a2a7ca1d21cbca9fe /tools/include | |
| parent | 24dea04767e6e5175f4750770281b0c17ac6a2fb (diff) | |
| download | linux-32b3652c307ef62f624182fac1fd6328ccc8fcbe.tar.bz2 | |
bpf: sync tools bpf.h uapi header
Only sync the header from include/uapi/linux/bpf.h.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 8daef7326bb7..83a95ae388dd 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -1801,6 +1801,30 @@ union bpf_attr { * Return * a non-negative value equal to or less than size on success, or * a negative error in case of failure. + * + * int skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header) + * Description + * This helper is similar to **bpf_skb_load_bytes**\ () in that + * it provides an easy way to load *len* bytes from *offset* + * from the packet associated to *skb*, into the buffer pointed + * by *to*. The difference to **bpf_skb_load_bytes**\ () is that + * a fifth argument *start_header* exists in order to select a + * base offset to start from. *start_header* can be one of: + * + * **BPF_HDR_START_MAC** + * Base offset to load data from is *skb*'s mac header. + * **BPF_HDR_START_NET** + * Base offset to load data from is *skb*'s network header. + * + * In general, "direct packet access" is the preferred method to + * access packet data, however, this helper is in particular useful + * in socket filters where *skb*\ **->data** does not always point + * to the start of the mac header and where "direct packet access" + * is not available. + * + * Return + * 0 on success, or a negative error in case of failure. + * */ #define __BPF_FUNC_MAPPER(FN) \ FN(unspec), \ @@ -1870,7 +1894,8 @@ union bpf_attr { FN(bind), \ FN(xdp_adjust_tail), \ FN(skb_get_xfrm_state), \ - FN(get_stack), + FN(get_stack), \ + FN(skb_load_bytes_relative), /* integer value in 'imm' field of BPF_CALL instruction selects which helper * function eBPF program intends to call @@ -1931,6 +1956,12 @@ enum bpf_adj_room_mode { BPF_ADJ_ROOM_NET, }; +/* Mode for BPF_FUNC_skb_load_bytes_relative helper. */ +enum bpf_hdr_start_off { + BPF_HDR_START_MAC, + BPF_HDR_START_NET, +}; + /* user accessible mirror of in-kernel sk_buff. * new fields can only be added to the end of this structure */ |