[master] 501246e93 Fix the order of HSH_Fail() and ObjSetState()
Martin Blix Grydeland
martin at varnish-software.com
Fri Apr 26 12:15:09 UTC 2019
commit 501246e939430dd60d44e8e3af40d6978f11186d
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date: Fri Apr 26 14:11:18 2019 +0200
Fix the order of HSH_Fail() and ObjSetState()
The previous patch 4130055c457903e7f904fa56c0db58d7e7467dc1 went a bit too
far in it's mission to reorder events, and included putting HSH_Fail()
after ObjSetState(). That caused problems for code looking at the
OC_F_FAILED to learn about failed fetches.
Change the order of this back to normal, and move the call to HSH_Fail()
into ObjSetState(), so that the order can be shown and the caveats
properly commented.
diff --git a/bin/varnishd/cache/cache_fetch.c b/bin/varnishd/cache/cache_fetch.c
index 63738e1fe..5535e00b7 100644
--- a/bin/varnishd/cache/cache_fetch.c
+++ b/bin/varnishd/cache/cache_fetch.c
@@ -809,7 +809,6 @@ vbf_stp_fail(struct worker *wrk, const struct busyobj *bo)
assert(bo->fetch_objcore->boc->state < BOS_FINISHED);
ObjSetState(wrk, bo->fetch_objcore, BOS_FAILED);
- HSH_Fail(bo->fetch_objcore);
if (!(bo->fetch_objcore->flags & OC_F_BUSY))
HSH_Kill(bo->fetch_objcore);
return (F_STP_DONE);
diff --git a/bin/varnishd/cache/cache_obj.c b/bin/varnishd/cache/cache_obj.c
index 89bb0497d..d723975da 100644
--- a/bin/varnishd/cache/cache_obj.c
+++ b/bin/varnishd/cache/cache_obj.c
@@ -84,6 +84,7 @@
#include <stdlib.h>
#include "cache_varnishd.h"
+#include "cache_objhead.h"
#include "cache_obj.h"
#include "vend.h"
#include "storage/storage.h"
@@ -257,8 +258,7 @@ ObjWaitExtend(const struct worker *wrk, const struct objcore *oc, uint64_t l)
*/
void
-ObjSetState(struct worker *wrk, const struct objcore *oc,
- enum boc_state_e next)
+ObjSetState(struct worker *wrk, struct objcore *oc, enum boc_state_e next)
{
const struct obj_methods *om;
@@ -275,6 +275,13 @@ ObjSetState(struct worker *wrk, const struct objcore *oc,
om->objsetstate(wrk, oc, next);
}
+ if (next == BOS_FAILED) {
+ /* Signal to cache_hash.c that this object is failed. This
+ * needs to happen before we signal the boc so that code
+ * will see the OC_F_FAILED flag after ObjWaitState() */
+ HSH_Fail(oc);
+ }
+
Lck_Lock(&oc->boc->mtx);
oc->boc->state = next;
AZ(pthread_cond_broadcast(&oc->boc->cond));
diff --git a/bin/varnishd/cache/cache_varnishd.h b/bin/varnishd/cache/cache_varnishd.h
index b3f766080..fab80d6ba 100644
--- a/bin/varnishd/cache/cache_varnishd.h
+++ b/bin/varnishd/cache/cache_varnishd.h
@@ -293,8 +293,7 @@ int ObjGetSpace(struct worker *, struct objcore *, ssize_t *sz, uint8_t **ptr);
void ObjExtend(struct worker *, struct objcore *, ssize_t l);
uint64_t ObjWaitExtend(const struct worker *, const struct objcore *,
uint64_t l);
-void ObjSetState(struct worker *, const struct objcore *,
- enum boc_state_e next);
+void ObjSetState(struct worker *, struct objcore *, enum boc_state_e next);
void ObjWaitState(const struct objcore *, enum boc_state_e want);
void ObjTrimStore(struct worker *, struct objcore *);
void ObjTouch(struct worker *, struct objcore *, vtim_real now);
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