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bpf: add msg_pop_data helper to tools

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Add the necessary header definitions to tools for new
msg_pop_data_helper.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
John Fastabend 2018-11-26 14:16:18 -08:00 committed by Daniel Borkmann
parent 7246d8ed4d
commit d913a2273a
2 changed files with 17 additions and 1 deletions
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16
tools/include/uapi/linux/bpf.h
View File

@ -2268,6 +2268,19 @@ union bpf_attr {
*
* Return
* 0 on success, or a negative error in case of failure.
*
* int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
* Description
* Will remove *pop* bytes from a *msg* starting at byte *start*.
* This may result in **ENOMEM** errors under certain situations if
* an allocation and copy are required due to a full ring buffer.
* However, the helper will try to avoid doing the allocation
* if possible. Other errors can occur if input parameters are
* invalid either due to *start* byte not being valid part of msg
* payload and/or *pop* value being to large.
*
* Return
* 0 on success, or a negative erro in case of failure.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@ -2360,7 +2373,8 @@ union bpf_attr {
FN(map_push_elem), \
FN(map_pop_elem), \
FN(map_peek_elem), \
FN(msg_push_data),
FN(msg_push_data), \
FN(msg_pop_data),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call

2
tools/testing/selftests/bpf/bpf_helpers.h
View File

@ -113,6 +113,8 @@ static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) =
(void *) BPF_FUNC_msg_pull_data;
static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) =
(void *) BPF_FUNC_msg_push_data;
static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) =
(void *) BPF_FUNC_msg_pop_data;
static int (*bpf_bind)(void *ctx, void *addr, int addr_len) =
(void *) BPF_FUNC_bind;
static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) =