bpf: add msg_pop_data helper to tools

Add the necessary header definitions to tools for new msg_pop_data_helper.

John Fastabend committed 7 years ago

Commit d913a221 parent 7246d8e2 files · +17 −1Browse files

Unified · Split

2 files

@@ -2268,6 +2268,19 @@ union bpf_attr { · 2267 unmodified lines
2268	2268	*
2269	2269	* Return
2270	2270	* 0 on success, or a negative error in case of failure.
	2271	+ *
	2272	+ * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags)
	2273	+ * Description
	2274	+ * Will remove pop bytes from a msg starting at byte start.
	2275	+ * This may result in ENOMEM errors under certain situations if
	2276	+ * an allocation and copy are required due to a full ring buffer.
	2277	+ * However, the helper will try to avoid doing the allocation
	2278	+ * if possible. Other errors can occur if input parameters are
	2279	+ * invalid either due to start byte not being valid part of msg
	2280	+ * payload and/or pop value being to large.
	2281	+ *
	2282	+ * Return
	2283	+ * 0 on success, or a negative erro in case of failure.
2271	2284	*/
2272	2285	#define __BPF_FUNC_MAPPER(FN) \
2273	2286	FN(unspec), \
@@ -2360,7 +2373,8 @@ union bpf_attr { · 86 unmodified lines
2360	2373	FN(map_push_elem), \
2361	2374	FN(map_pop_elem), \
2362	2375	FN(map_peek_elem), \
2363		− FN(msg_push_data),
	2376	+ FN(msg_push_data), \
	2377	+ FN(msg_pop_data),
2364	2378
2365	2379	/* integer value in 'imm' field of BPF_CALL instruction selects which helper
2366	2380	* function eBPF program intends to call

@@ -113,6 +113,8 @@ static int (bpf_msg_pull_data)(void ctx, int start, int end, int flags) = · 112 unmodified lines
113	113	(void *) BPF_FUNC_msg_pull_data;
114	114	static int (bpf_msg_push_data)(void ctx, int start, int end, int flags) =
115	115	(void *) BPF_FUNC_msg_push_data;
	116	+static int (bpf_msg_pop_data)(void ctx, int start, int cut, int flags) =
	117	+ (void *) BPF_FUNC_msg_pop_data;
116	118	static int (bpf_bind)(void ctx, void *addr, int addr_len) =
117	119	(void *) BPF_FUNC_bind;
118	120	static int (bpf_xdp_adjust_tail)(void ctx, int offset) =

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