add bereq.is_hitpass and bereq.is_hitmiss

as copies of the respective client side flags

bin/varnishd/cache/cache_fetch.c

@@ -1114,6 +1114,9 @@ VBF_Fetch(struct worker *wrk, struct req *req, struct objcore *oc,
 		WRONG("Wrong fetch mode");
 	}
 
+	bo->is_hitpass = req->is_hitpass;
+	bo->is_hitmiss = req->is_hitmiss;
+
 	VSLb(bo->vsl, SLT_Begin, "bereq %u %s", VXID(req->vsl->wid), how);
 	VSLb(bo->vsl, SLT_VCL_use, "%s", VCL_Name(bo->vcl));
 	VSLb(req->vsl, SLT_Link, "bereq %u %s", VXID(bo->vsl->wid), how);

bin/varnishtest/tests/c00075.vtc

@@ -53,6 +53,8 @@ server s1 {
 varnish v1 \
 	-arg "-s default,1m" -vcl+backend {
 	sub vcl_backend_response {
+		set beresp.http.be-hitmiss = bereq.is_hitmiss;
+		set beresp.http.be-hitpass = bereq.is_hitpass;
 		if (bereq.url == "/hfp") {
 			return (pass(10m));
 		}
@@ -75,6 +77,8 @@ client c1 {
 	expect resp.bodylen == 65536
 	expect resp.http.is-hitmiss == false
 	expect resp.http.is-hitpass == false
+	expect resp.http.be-hitmiss == resp.http.is-hitmiss
+	expect resp.http.be-hitpass == resp.http.is-hitpass
 	expect_pattern
 } -start
 
@@ -98,6 +102,8 @@ client c1 {
 	expect resp.bodylen == 65536
 	expect resp.http.is-hitmiss == true
 	expect resp.http.is-hitpass == false
+	expect resp.http.be-hitmiss == resp.http.is-hitmiss
+	expect resp.http.be-hitpass == resp.http.is-hitpass
 	expect_pattern
 } -start
 
@@ -122,6 +128,8 @@ client c1 {
 	expect resp.bodylen == 65536
 	expect resp.http.is-hitmiss == false
 	expect resp.http.is-hitpass == false
+	expect resp.http.be-hitmiss == resp.http.is-hitmiss
+	expect resp.http.be-hitpass == resp.http.is-hitpass
 	expect_pattern
 } -start
 
@@ -145,6 +153,8 @@ client c1 {
 	expect resp.bodylen == 65536
 	expect resp.http.is-hitmiss == false
 	expect resp.http.is-hitpass == true
+	expect resp.http.be-hitmiss == resp.http.is-hitmiss
+	expect resp.http.be-hitpass == resp.http.is-hitpass
 	expect_pattern
 } -start
 

doc/sphinx/reference/vcl_var.rst

@@ -650,6 +650,22 @@ bereq.is_bgfetch
 	grace, and this fetch was kicked of in the background to get
 	a fresh copy.
 
+bereq.is_hitmiss
+
+	Type: BOOL
+
+	Readable from: backend
+
+	If this backend request was caused by a hitmiss.
+
+bereq.is_hitpass
+
+	Type: BOOL
+
+	Readable from: backend
+
+	If this backend request was caused by a hitpass.
+
 beresp
 ~~~~~~
 

include/tbl/bo_flags.h

@@ -43,6 +43,8 @@ BO_FLAG(do_pass,	0, 0, 0, 0, "")
 BO_FLAG(uncacheable,	0, 0, 0, 0, "")
 BO_FLAG(was_304,	0, 1, 0, 0, "")
 BO_FLAG(is_bgfetch,	1, 0, 0, 0, "")
+BO_FLAG(is_hitmiss,	1, 0, 0, 0, "")
+BO_FLAG(is_hitpass,	1, 0, 0, 0, "")
 #undef BO_FLAG
 
 /*lint -restore */