MINOR: stream: Add http-buffer-request option in the waiting entities

When http-buffer-request option is set on a proxy, the processing will be
paused to wait the full request payload or a full buffer. So it is an entity
that block the processing, just like a rule or a filter that yields. So now,
it is reported as a waiting entity if an error or a timeout occurred.

To do so, an stream entity type is added for this option. There is no
pointer. And "waiting_entity" sample fetch returns the option name.

Author: capflam

include/haproxy/stream-t.h

@@ -161,9 +161,10 @@ enum {
  * depending on the context;
  */
 enum {
-	STRM_ENTITY_NONE   = 0x0000,
-	STRM_ENTITY_RULE   = 0x0001,
-	STRM_ENTITY_FILTER = 0x0002,
+	STRM_ENTITY_NONE      = 0x0000,
+	STRM_ENTITY_RULE      = 0x0001,
+	STRM_ENTITY_FILTER    = 0x0002,
+	STRM_ENTITY_WREQ_BODY = 0x0003,
 };
 
 /* This function is used to report flags in debugging tools. Please reflect

src/http_ana.c

@@ -826,8 +826,12 @@ int http_wait_for_request_body(struct stream *s, struct channel *req, int an_bit
 
 	switch (http_wait_for_msg_body(s, req, s->be->timeout.httpreq, 0)) {
 	case HTTP_RULE_RES_CONT:
+		s->waiting_entity.type = STRM_ENTITY_NONE;
+		s->waiting_entity.ptr = NULL;
 		goto http_end;
 	case HTTP_RULE_RES_YIELD:
+		s->waiting_entity.type = STRM_ENTITY_WREQ_BODY;
+		s->waiting_entity.ptr = NULL;
 		goto missing_data_or_waiting;
 	case HTTP_RULE_RES_BADREQ:
 		goto return_bad_req;

src/stream.c

@@ -4189,6 +4189,12 @@ static int smp_fetch_waiting_entity(const struct arg *args, struct sample *smp,
 			smp->data.u.str = *trash;
 		}
 	}
+	else if (smp->strm->waiting_entity.type == STRM_ENTITY_WREQ_BODY) {
+		struct buffer *trash = get_trash_chunk();
+
+		chunk_memcat(trash, "http-buffer-request", 19);
+		smp->data.u.str = *trash;
+	}
 	else
 		return 0;