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bpf: sync tools bpf.h uapi header

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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>
This commit is contained in:
Daniel Borkmann 2018-05-04 01:08:24 +02:00 committed by Alexei Starovoitov
parent 24dea04767
commit 32b3652c30
1 changed files with 32 additions and 1 deletions
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33
tools/include/uapi/linux/bpf.h
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@ -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
*/