[experimental-ims] 3325c6c Eliminate the "sp" argument to the request state engine states.
Poul-Henning Kamp
phk at FreeBSD.org
Thu Dec 18 10:27:49 CET 2014
commit 3325c6c752c6c9b870f5aa600c113627112e0bf2
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date: Wed Jun 20 09:54:22 2012 +0000
Eliminate the "sp" argument to the request state engine states.
diff --git a/bin/varnishd/cache/cache_center.c b/bin/varnishd/cache/cache_center.c
index eadbd3a..6e394e4 100644
--- a/bin/varnishd/cache/cache_center.c
+++ b/bin/varnishd/cache/cache_center.c
@@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
- * This file contains the two central state machine for pushing
+ * This file contains the two central state machine for pushing
* sessions and requests.
*
* The first part of the file, entrypoint CNT_Session() and down to
@@ -370,10 +370,10 @@ CNT_Session(struct sess *sp)
case SESS_DONE_RET_GONE:
return;
case SESS_DONE_RET_WAIT:
- sp->step = STP_WAIT;
+ sp->step = STP_WAIT;
break;
case SESS_DONE_RET_START:
- sp->step = STP_START;
+ sp->step = STP_START;
break;
default:
WRONG("Illegal enum cnt_sess_done_ret");
@@ -409,11 +409,10 @@ DOT }
*/
static int
-cnt_prepresp(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_prepresp(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
bo = req->busyobj;
@@ -476,9 +475,7 @@ cnt_prepresp(struct sess *sp, struct worker *wrk, struct req *req)
HTTP_Setup(req->resp, req->ws, req->vsl, HTTP_Resp);
RES_BuildHttp(req);
- assert(req->sp == sp);
VCL_deliver_method(req);
- assert(req->sp == sp);
switch (req->handling) {
case VCL_RET_DELIVER:
break;
@@ -494,12 +491,12 @@ cnt_prepresp(struct sess *sp, struct worker *wrk, struct req *req)
}
AZ(req->obj);
http_Teardown(req->resp);
- sp->step = STP_RESTART;
+ req->sp->step = STP_RESTART;
return (0);
default:
WRONG("Illegal action in vcl_deliver{}");
}
- sp->step = STP_DELIVER;
+ req->sp->step = STP_DELIVER;
return (0);
}
@@ -519,11 +516,10 @@ DOT deliver -> DONE [style=bold,color=blue]
*/
static int
-cnt_deliver(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_deliver(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->obj, OBJECT_MAGIC);
@@ -539,7 +535,7 @@ cnt_deliver(struct sess *sp, struct worker *wrk, struct req *req)
HSH_Deref(&wrk->stats, NULL, &req->obj);
VBO_DerefBusyObj(wrk, &req->busyobj);
req->err_code = 503;
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
}
VBO_DerefBusyObj(wrk, &req->busyobj);
@@ -576,13 +572,12 @@ DOT rsterr [label="RESTART",shape=plaintext]
*/
static int
-cnt_error(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_error(struct worker *wrk, struct req *req)
{
struct http *h;
struct busyobj *bo;
char date[40];
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
AZ(req->objcore);
@@ -591,7 +586,7 @@ cnt_error(struct sess *sp, struct worker *wrk, struct req *req)
bo = VBO_GetBusyObj(wrk);
req->busyobj = bo;
- bo->vsl->wid = sp->vsl_id;
+ bo->vsl->wid = req->sp->vsl_id;
AZ(bo->stats);
bo->stats = &wrk->stats;
req->objcore = HSH_NewObjCore(wrk);
@@ -625,15 +620,13 @@ cnt_error(struct sess *sp, struct worker *wrk, struct req *req)
http_PutResponse(h, req->err_reason);
else
http_PutResponse(h, http_StatusMessage(req->err_code));
- assert(req->sp == sp);
VCL_error_method(req);
- assert(req->sp == sp);
if (req->handling == VCL_RET_RESTART &&
req->restarts < cache_param->max_restarts) {
HSH_Drop(wrk, &req->obj);
VBO_DerefBusyObj(wrk, &req->busyobj);
- sp->step = STP_RESTART;
+ req->sp->step = STP_RESTART;
return (0);
} else if (req->handling == VCL_RET_RESTART)
req->handling = VCL_RET_DELIVER;
@@ -648,7 +641,7 @@ cnt_error(struct sess *sp, struct worker *wrk, struct req *req)
req->err_reason = NULL;
http_Teardown(bo->bereq);
VBO_DerefBusyObj(wrk, &req->busyobj);
- sp->step = STP_PREPRESP;
+ req->sp->step = STP_PREPRESP;
return (0);
}
@@ -666,12 +659,11 @@ DOT fetch -> fetchbody [style=bold,color=blue]
*/
static int
-cnt_fetch(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_fetch(struct worker *wrk, struct req *req)
{
int i, need_host_hdr;
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
@@ -736,16 +728,14 @@ cnt_fetch(struct sess *sp, struct worker *wrk, struct req *req)
AZ(bo->do_esi);
AZ(bo->do_pass);
- assert(req->sp == sp);
VCL_fetch_method(req);
- assert(req->sp == sp);
if (bo->do_pass)
req->objcore->flags |= OC_F_PASS;
switch (req->handling) {
case VCL_RET_DELIVER:
- sp->step = STP_FETCHBODY;
+ req->sp->step = STP_FETCHBODY;
return (0);
default:
break;
@@ -771,10 +761,10 @@ cnt_fetch(struct sess *sp, struct worker *wrk, struct req *req)
switch (req->handling) {
case VCL_RET_RESTART:
- sp->step = STP_RESTART;
+ req->sp->step = STP_RESTART;
return (0);
case VCL_RET_ERROR:
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
default:
WRONG("Illegal action in vcl_fetch{}");
@@ -795,7 +785,7 @@ DOT fetchbody:out -> prepresp [style=bold,color=blue]
*/
static int
-cnt_fetchbody(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_fetchbody(struct worker *wrk, struct req *req)
{
struct http *hp, *hp2;
char *b;
@@ -805,7 +795,6 @@ cnt_fetchbody(struct sess *sp, struct worker *wrk, struct req *req)
int varyl = 0, pass;
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
bo = req->busyobj;
@@ -930,7 +919,7 @@ cnt_fetchbody(struct sess *sp, struct worker *wrk, struct req *req)
bo->stats = NULL;
if (req->obj == NULL) {
req->err_code = 503;
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
VDI_CloseFd(&bo->vbc);
VBO_DerefBusyObj(wrk, &req->busyobj);
return (0);
@@ -1011,12 +1000,12 @@ cnt_fetchbody(struct sess *sp, struct worker *wrk, struct req *req)
HSH_Deref(&wrk->stats, NULL, &req->obj);
VBO_DerefBusyObj(wrk, &req->busyobj);
req->err_code = 503;
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
}
assert(WRW_IsReleased(wrk));
- sp->step = STP_PREPRESP;
+ req->sp->step = STP_PREPRESP;
return (0);
}
@@ -1039,9 +1028,8 @@ DOT hit:del -> prepresp [label="deliver",style=bold,color=green]
*/
static int
-cnt_hit(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_hit(struct worker *wrk, struct req *req)
{
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
@@ -1052,15 +1040,13 @@ cnt_hit(struct sess *sp, struct worker *wrk, struct req *req)
assert(!(req->obj->objcore->flags & OC_F_PASS));
- assert(req->sp == sp);
VCL_hit_method(req);
- assert(req->sp == sp);
if (req->handling == VCL_RET_DELIVER) {
//AZ(req->busyobj->bereq->ws);
//AZ(req->busyobj->beresp->ws);
(void)FetchReqBody(req, 0);
- sp->step = STP_PREPRESP;
+ req->sp->step = STP_PREPRESP;
return (0);
}
@@ -1070,13 +1056,13 @@ cnt_hit(struct sess *sp, struct worker *wrk, struct req *req)
switch(req->handling) {
case VCL_RET_PASS:
- sp->step = STP_PASS;
+ req->sp->step = STP_PASS;
return (0);
case VCL_RET_ERROR:
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
case VCL_RET_RESTART:
- sp->step = STP_RESTART;
+ req->sp->step = STP_RESTART;
return (0);
default:
WRONG("Illegal action in vcl_hit{}");
@@ -1103,13 +1089,12 @@ DOT lookup:yes -> pass [style=bold,color=red]
*/
static int
-cnt_lookup(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_lookup(struct worker *wrk, struct req *req)
{
struct objcore *oc;
struct object *o;
struct objhead *oh;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
AZ(req->objcore);
@@ -1127,7 +1112,6 @@ cnt_lookup(struct sess *sp, struct worker *wrk, struct req *req)
* worker thread. We return to STP_LOOKUP when the busy
* object has been unbusied, and still have the hash digest
* around to do the lookup with.
- * NB: Do not access sp any more !
*/
return (2);
}
@@ -1156,7 +1140,7 @@ cnt_lookup(struct sess *sp, struct worker *wrk, struct req *req)
req->vary_e = NULL;
req->objcore = oc;
- sp->step = STP_MISS;
+ req->sp->step = STP_MISS;
return (0);
}
@@ -1177,13 +1161,13 @@ cnt_lookup(struct sess *sp, struct worker *wrk, struct req *req)
VSLb(req->vsl, SLT_HitPass, "%u", req->obj->xid);
(void)HSH_Deref(&wrk->stats, NULL, &req->obj);
AZ(req->objcore);
- sp->step = STP_PASS;
+ req->sp->step = STP_PASS;
return (0);
}
wrk->stats.cache_hit++;
VSLb(req->vsl, SLT_Hit, "%u", req->obj->xid);
- sp->step = STP_HIT;
+ req->sp->step = STP_HIT;
return (0);
}
@@ -1202,11 +1186,10 @@ DOT
*/
static int
-cnt_miss(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_miss(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->vcl, VCL_CONF_MAGIC);
@@ -1228,13 +1211,11 @@ cnt_miss(struct sess *sp, struct worker *wrk, struct req *req)
http_SetHeader(bo->bereq, "Accept-Encoding: gzip");
}
- assert(req->sp == sp);
VCL_miss_method(req);
- assert(req->sp == sp);
if (req->handling == VCL_RET_FETCH) {
CHECK_OBJ_NOTNULL(bo, BUSYOBJ_MAGIC);
- sp->step = STP_FETCH;
+ req->sp->step = STP_FETCH;
return (0);
}
@@ -1245,13 +1226,13 @@ cnt_miss(struct sess *sp, struct worker *wrk, struct req *req)
switch(req->handling) {
case VCL_RET_ERROR:
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
break;
case VCL_RET_PASS:
- sp->step = STP_PASS;
+ req->sp->step = STP_PASS;
break;
case VCL_RET_RESTART:
- sp->step = STP_RESTART;
+ req->sp->step = STP_RESTART;
break;
default:
WRONG("Illegal action in vcl_miss{}");
@@ -1277,11 +1258,10 @@ XDOT err_pass [label="ERROR",shape=plaintext]
*/
static int
-cnt_pass(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_pass(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->vcl, VCL_CONF_MAGIC);
@@ -1291,24 +1271,22 @@ cnt_pass(struct sess *sp, struct worker *wrk, struct req *req)
req->busyobj = VBO_GetBusyObj(wrk);
bo = req->busyobj;
- bo->vsl->wid = sp->vsl_id;
+ bo->vsl->wid = req->sp->vsl_id;
bo->refcount = 2;
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, HTTP_Bereq);
http_FilterReq(req, HTTPH_R_PASS);
- assert(req->sp == sp);
VCL_pass_method(req);
- assert(req->sp == sp);
if (req->handling == VCL_RET_ERROR) {
http_Teardown(bo->bereq);
VBO_DerefBusyObj(wrk, &req->busyobj);
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
}
assert(req->handling == VCL_RET_PASS);
wrk->acct_tmp.pass++;
- sp->step = STP_FETCH;
+ req->sp->step = STP_FETCH;
req->objcore = HSH_NewObjCore(wrk);
req->objcore->busyobj = bo;
@@ -1341,11 +1319,10 @@ DOT err_pipe [label="ERROR",shape=plaintext]
*/
static int
-cnt_pipe(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_pipe(struct worker *wrk, struct req *req)
{
struct busyobj *bo;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->vcl, VCL_CONF_MAGIC);
@@ -1354,13 +1331,11 @@ cnt_pipe(struct sess *sp, struct worker *wrk, struct req *req)
wrk->acct_tmp.pipe++;
req->busyobj = VBO_GetBusyObj(wrk);
bo = req->busyobj;
- bo->vsl->wid = sp->vsl_id;
+ bo->vsl->wid = req->sp->vsl_id;
HTTP_Setup(bo->bereq, bo->ws, bo->vsl, HTTP_Bereq);
http_FilterReq(req, 0);
- assert(req->sp == sp);
VCL_pipe_method(req);
- assert(req->sp == sp);
if (req->handling == VCL_RET_ERROR)
INCOMPL();
@@ -1386,20 +1361,19 @@ DOT restart -> recv [color=purple]
*/
static int
-cnt_restart(struct sess *sp, const struct worker *wrk, struct req *req)
+cnt_restart(const struct worker *wrk, struct req *req)
{
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
req->director = NULL;
if (++req->restarts >= cache_param->max_restarts) {
req->err_code = 503;
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
} else {
req->err_code = 0;
- sp->step = STP_RECV;
+ req->sp->step = STP_RECV;
}
return (0);
}
@@ -1433,12 +1407,11 @@ DOT hash -> lookup [label="hash",style=bold,color=green]
*/
static int
-cnt_recv(struct sess *sp, const struct worker *wrk, struct req *req)
+cnt_recv(const struct worker *wrk, struct req *req)
{
unsigned recv_handling;
struct SHA256Context sha256ctx;
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
CHECK_OBJ_NOTNULL(req->vcl, VCL_CONF_MAGIC);
@@ -1457,9 +1430,7 @@ cnt_recv(struct sess *sp, const struct worker *wrk, struct req *req)
http_CollectHdr(req->http, H_Cache_Control);
- assert(req->sp == sp);
VCL_recv_method(req);
- assert(req->sp == sp);
recv_handling = req->handling;
if (cache_param->http_gzip_support &&
@@ -1475,9 +1446,7 @@ cnt_recv(struct sess *sp, const struct worker *wrk, struct req *req)
req->sha256ctx = &sha256ctx; /* so HSH_AddString() can find it */
SHA256_Init(req->sha256ctx);
- assert(req->sp == sp);
VCL_hash_method(req);
- assert(req->sp == sp);
assert(req->handling == VCL_RET_HASH);
SHA256_Final(req->digest, req->sha256ctx);
req->sha256ctx = NULL;
@@ -1489,7 +1458,7 @@ cnt_recv(struct sess *sp, const struct worker *wrk, struct req *req)
switch(recv_handling) {
case VCL_RET_LOOKUP:
- sp->step = STP_LOOKUP;
+ req->sp->step = STP_LOOKUP;
return (0);
case VCL_RET_PIPE:
if (req->esi_level > 0) {
@@ -1497,13 +1466,13 @@ cnt_recv(struct sess *sp, const struct worker *wrk, struct req *req)
INCOMPL();
return (1);
}
- sp->step = STP_PIPE;
+ req->sp->step = STP_PIPE;
return (0);
case VCL_RET_PASS:
- sp->step = STP_PASS;
+ req->sp->step = STP_PASS;
return (0);
case VCL_RET_ERROR:
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
return (0);
default:
WRONG("Illegal action in vcl_recv{}");
@@ -1523,12 +1492,11 @@ DOT start -> DONE [label=errors]
*/
static int
-cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
+cnt_start(struct worker *wrk, struct req *req)
{
char *p;
const char *r = "HTTP/1.1 100 Continue\r\n\r\n";
- CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
CHECK_OBJ_NOTNULL(wrk, WORKER_MAGIC);
CHECK_OBJ_NOTNULL(req, REQ_MAGIC);
AZ(req->restarts);
@@ -1536,7 +1504,6 @@ cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
AZ(req->vcl);
AZ(req->esi_level);
assert(!isnan(req->t_req));
- assert(req->sp == sp);
/* Update stats of various sorts */
wrk->stats.client_req++;
@@ -1545,7 +1512,7 @@ cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
/* Assign XID and log */
req->xid = ++xids; /* XXX not locked */
VSLb(req->vsl, SLT_ReqStart, "%s %s %u",
- sp->addr, sp->port, req->xid);
+ req->sp->addr, req->sp->port, req->xid);
/* Borrow VCL reference from worker thread */
VCL_Refresh(&wrk->vcl);
@@ -1559,7 +1526,7 @@ cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
/* If we could not even parse the request, just close */
if (req->err_code == 400) {
- SES_Close(sp, "junk");
+ SES_Close(req->sp, "junk");
return (1);
}
@@ -1574,8 +1541,8 @@ cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
if (req->err_code == 0 && http_GetHdr(req->http, H_Expect, &p)) {
if (strcasecmp(p, "100-continue")) {
req->err_code = 417;
- } else if (strlen(r) != write(sp->fd, r, strlen(r))) {
- SES_Close(sp, "remote closed");
+ } else if (strlen(r) != write(req->sp->fd, r, strlen(r))) {
+ SES_Close(req->sp, "remote closed");
return (1);
}
}
@@ -1587,9 +1554,9 @@ cnt_start(struct sess *sp, struct worker *wrk, struct req *req)
HTTP_Copy(req->http0, req->http); /* Copy for restart/ESI use */
if (req->err_code)
- sp->step = STP_ERROR;
+ req->sp->step = STP_ERROR;
else
- sp->step = STP_RECV;
+ req->sp->step = STP_RECV;
return (0);
}
diff --git a/include/tbl/steps.h b/include/tbl/steps.h
index e429631..703c418 100644
--- a/include/tbl/steps.h
+++ b/include/tbl/steps.h
@@ -30,17 +30,17 @@
/*lint -save -e525 -e539 */
SESS_STEP(wait, WAIT, (sp, sp->wrk, sp->req))
-SESS_STEP(restart, RESTART, (sp, sp->wrk, sp->req))
-SESS_STEP(recv, RECV, (sp, sp->wrk, sp->req))
-SESS_STEP(start, START, (sp, sp->wrk, sp->req))
-SESS_STEP(pipe, PIPE, (sp, sp->wrk, sp->req))
-SESS_STEP(pass, PASS, (sp, sp->wrk, sp->req))
-SESS_STEP(lookup, LOOKUP, (sp, sp->wrk, sp->req))
-SESS_STEP(miss, MISS, (sp, sp->wrk, sp->req))
-SESS_STEP(hit, HIT, (sp, sp->wrk, sp->req))
-SESS_STEP(fetch, FETCH, (sp, sp->wrk, sp->req))
-SESS_STEP(fetchbody, FETCHBODY, (sp, sp->wrk, sp->req))
-SESS_STEP(prepresp, PREPRESP, (sp, sp->wrk, sp->req))
-SESS_STEP(deliver, DELIVER, (sp, sp->wrk, sp->req))
-SESS_STEP(error, ERROR, (sp, sp->wrk, sp->req))
+SESS_STEP(restart, RESTART, (wrk, req))
+SESS_STEP(recv, RECV, (wrk, req))
+SESS_STEP(start, START, (wrk, req))
+SESS_STEP(pipe, PIPE, (wrk, req))
+SESS_STEP(pass, PASS, (wrk, req))
+SESS_STEP(lookup, LOOKUP, (wrk, req))
+SESS_STEP(miss, MISS, (wrk, req))
+SESS_STEP(hit, HIT, (wrk, req))
+SESS_STEP(fetch, FETCH, (wrk, req))
+SESS_STEP(fetchbody, FETCHBODY, (wrk, req))
+SESS_STEP(prepresp, PREPRESP, (wrk, req))
+SESS_STEP(deliver, DELIVER, (wrk, req))
+SESS_STEP(error, ERROR, (wrk, req))
/*lint -restore */
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