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tools: update include/uapi/linux/bpf.h

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Pull definitions for bpf_skc_lookup_tcp and bpf_sk_check_syncookie.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lorenz Bauer 2019-03-22 09:54:03 +08:00 committed by Alexei Starovoitov
parent 3990408470
commit 253c8dde3c
1 changed files with 35 additions and 1 deletions
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36
tools/include/uapi/linux/bpf.h
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@ -2431,6 +2431,38 @@ union bpf_attr {
* Return
* A **struct bpf_sock** pointer on success, or **NULL** in
* case of failure.
*
* struct bpf_sock *bpf_skc_lookup_tcp(void *ctx, struct bpf_sock_tuple *tuple, u32 tuple_size, u64 netns, u64 flags)
* Description
* Look for TCP socket matching *tuple*, optionally in a child
* network namespace *netns*. The return value must be checked,
* and if non-**NULL**, released via **bpf_sk_release**\ ().
*
* This function is identical to bpf_sk_lookup_tcp, except that it
* also returns timewait or request sockets. Use bpf_sk_fullsock
* or bpf_tcp_socket to access the full structure.
*
* This helper is available only if the kernel was compiled with
* **CONFIG_NET** configuration option.
* Return
* Pointer to **struct bpf_sock**, or **NULL** in case of failure.
* For sockets with reuseport option, the **struct bpf_sock**
* result is from **reuse->socks**\ [] using the hash of the tuple.
*
* int bpf_tcp_check_syncookie(struct bpf_sock *sk, void *iph, u32 iph_len, struct tcphdr *th, u32 th_len)
* Description
* Check whether iph and th contain a valid SYN cookie ACK for
* the listening socket in sk.
*
* iph points to the start of the IPv4 or IPv6 header, while
* iph_len contains sizeof(struct iphdr) or sizeof(struct ip6hdr).
*
* th points to the start of the TCP header, while th_len contains
* sizeof(struct tcphdr).
*
* Return
* 0 if iph and th are a valid SYN cookie ACK, or a negative error
* otherwise.
*/
#define __BPF_FUNC_MAPPER(FN) \
FN(unspec), \
@ -2531,7 +2563,9 @@ union bpf_attr {
FN(sk_fullsock), \
FN(tcp_sock), \
FN(skb_ecn_set_ce), \
FN(get_listener_sock),
FN(get_listener_sock), \
FN(skc_lookup_tcp), \
FN(tcp_check_syncookie),
/* integer value in 'imm' field of BPF_CALL instruction selects which helper
* function eBPF program intends to call