[MEDIUM] backend: introduce the "static-rr" LB algorithm
The "static-rr" is just the old round-robin algorithm. It is still
in use when a hash algorithm is used and the data to hash is not
present, but it was impossible to configure it explicitly. This one
is cheaper in terms of CPU and supports unlimited numbers of servers,
so it makes sense to be able to use it.
diff --git a/include/types/backend.h b/include/types/backend.h
index a73a36a..a8f8586 100644
--- a/include/types/backend.h
+++ b/include/types/backend.h
@@ -42,6 +42,9 @@
#define BE_LB_HASH_PRM 0x00002 /* hash HTTP URL parameter */
#define BE_LB_HASH_HDR 0x00003 /* hash HTTP header value */
#define BE_LB_HASH_RDP 0x00004 /* hash RDP cookie value */
+
+#define BE_LB_RR_DYN 0x00000 /* dynamic round robin (default) */
+#define BE_LB_RR_STATIC 0x00001 /* static round robin */
#define BE_LB_PARM 0x000FF /* mask to get/clear the LB param */
/* Required input(s) */
@@ -65,6 +68,7 @@
#define BE_LB_ALGO_NONE (BE_LB_KIND_NONE | BE_LB_NEED_NONE) /* not defined */
#define BE_LB_ALGO_RR (BE_LB_KIND_RR | BE_LB_NEED_NONE) /* round robin */
#define BE_LB_ALGO_LC (BE_LB_KIND_LC | BE_LB_NEED_NONE) /* least connections */
+#define BE_LB_ALGO_SRR (BE_LB_KIND_RR | BE_LB_NEED_NONE | BE_LB_RR_STATIC) /* static round robin */
#define BE_LB_ALGO_SH (BE_LB_KIND_HI | BE_LB_NEED_ADDR | BE_LB_HASH_SRC) /* hash: source IP */
#define BE_LB_ALGO_UH (BE_LB_KIND_HI | BE_LB_NEED_HTTP | BE_LB_HASH_URI) /* hash: HTTP URI */
#define BE_LB_ALGO_PH (BE_LB_KIND_HI | BE_LB_NEED_HTTP | BE_LB_HASH_PRM) /* hash: HTTP URL parameter */