[PATCH] Expose the backend of a simple director

[Kristian Lyngstol]

This is needed if a director (like the dns director) needs a closer look at
each backend to determine which to use. IE: Look at the IP or similar.

PS: It seems a bit wrong to expose vdi_simple_SOMETHING directly, but it
also seemed strange to do VBE_Something. More semantics than anything,
though.
---
 varnish-cache/bin/varnishd/cache.h         |    1 +
 varnish-cache/bin/varnishd/cache_backend.c |   14 ++++++++++++++
 2 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/varnish-cache/bin/varnishd/cache.h b/varnish-cache/bin/varnishd/cache.h
index 2561a0d..35e286d 100644
--- a/varnish-cache/bin/varnishd/cache.h
+++ b/varnish-cache/bin/varnishd/cache.h
@@ -464,6 +464,7 @@ void VBE_ClosedFd(struct sess *sp);
 void VBE_RecycleFd(struct sess *sp);
 void VBE_AddHostHeader(const struct sess *sp);
 void VBE_Poll(void);
+struct backend *vdi_simple_get_backend(const struct director *d);
 
 /* cache_backend_cfg.c */
 void VBE_Init(void);
diff --git a/varnish-cache/bin/varnishd/cache_backend.c b/varnish-cache/bin/varnishd/cache_backend.c
index ed35fec..a0c54c6 100644
--- a/varnish-cache/bin/varnishd/cache_backend.c
+++ b/varnish-cache/bin/varnishd/cache_backend.c
@@ -498,6 +498,20 @@ vdi_simple_healthy(double now, const struct director *d, uintptr_t target)
 	return (vbe_Healthy(now, target, vs->backend));
 }
 
+/* Reveals the real backend of a simple director if needed. */
+struct backend *
+vdi_simple_get_backend(const struct director *d)
+{
+	CHECK_OBJ_NOTNULL(d, DIRECTOR_MAGIC);
+	struct vdi_simple *vs, *vs2;
+
+	vs2 = d->priv;
+	if (vs2->magic != VDI_SIMPLE_MAGIC)
+		return NULL;
+	CAST_OBJ_NOTNULL(vs, d->priv, VDI_SIMPLE_MAGIC);
+	return vs->backend;
+}
+
 /*lint -e{818} not const-able */
 static void
 vdi_simple_fini(struct director *d)
-- 
1.5.4.3

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