bpf: sync bpf.h to tools/ (3745ee18) · Commits · 戴 / test

tools/include/uapi/linux/bpf.h

+34 −3

Original line number	Diff line number	Diff line
		@@ -1572,8 +1572,11 @@ union bpf_attr {
		* but this is only implemented for native XDP (with driver
		* support) as of this writing).
		*
		* All values for flags are reserved for future usage, and must
		* be left at zero.
		* The lower two bits of flags are used as the return code if
		* the map lookup fails. This is so that the return value can be
		* one of the XDP program return codes up to XDP_TX, as chosen by
		* the caller. Any higher bits in the flags argument must be
		* unset.
		*
		* When used to redirect packets to net devices, this helper
		* provides a high performance increase over bpf_redirect\ ().
		@@ -2711,6 +2714,33 @@ union bpf_attr {
		* -EPERM if no permission to send the sig.
		*
		* -EAGAIN if bpf program can try again.
		*
		* s64 bpf_tcp_gen_syncookie(struct bpf_sock sk, void iph, u32 iph_len, struct tcphdr *th, u32 th_len)
		* Description
		* Try to issue a SYN cookie for the packet with corresponding
		* IP/TCP headers, iph and th, on 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 the length of the TCP header.
		*
		* Return
		* On success, lower 32 bits hold the generated SYN cookie in
		* followed by 16 bits which hold the MSS value for that cookie,
		* and the top 16 bits are unused.
		*
		* On failure, the returned value is one of the following:
		*
		* -EINVAL SYN cookie cannot be issued due to error
		*
		* -ENOENT SYN cookie should not be issued (no SYN flood)
		*
		* -EOPNOTSUPP kernel configuration does not enable SYN cookies
		*
		* -EPROTONOSUPPORT IP packet version is not 4 or 6
		*/
		#define __BPF_FUNC_MAPPER(FN) \
		FN(unspec), \
		@@ -2822,7 +2852,8 @@ union bpf_attr {
		FN(strtoul), \
		FN(sk_storage_get), \
		FN(sk_storage_delete), \
		FN(send_signal),
		FN(send_signal), \
		FN(tcp_gen_syncookie),

		/* integer value in 'imm' field of BPF_CALL instruction selects which helper
		* function eBPF program intends to call

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