From b8ce351d9c45d788e11b6ae7d66650484b016aeb Mon Sep 17 00:00:00 2001
From: Michael Adam <obnox@samba.org>
Date: Mon, 20 Oct 2008 23:52:02 +0200
Subject: [PATCH] libsmbconf: add backend_requires_messaging() method to
 libsmbconf.

In a clustered environment, the registry backend needs messaging
to be set up since ctdb requires this.

Michael
(cherry picked from commit 5d2255e13cf2e468887a61fb9a7e99d2ba665333)
---
 source/lib/smbconf/smbconf.c         |  9 +++++++++
 source/lib/smbconf/smbconf.h         |  1 +
 source/lib/smbconf/smbconf_private.h |  1 +
 source/lib/smbconf/smbconf_reg.c     | 11 +++++++++++
 source/lib/smbconf/smbconf_txt.c     |  6 ++++++
 5 files changed, 28 insertions(+)

diff --git a/source/lib/smbconf/smbconf.c b/source/lib/smbconf/smbconf.c
index 1a9b4e07f94..7911687a889 100644
--- a/source/lib/smbconf/smbconf.c
+++ b/source/lib/smbconf/smbconf.c
@@ -43,6 +43,15 @@ static WERROR smbconf_global_check(struct smbconf_ctx *ctx)
  **********************************************************************/
 
 /**
+ * Tell whether the backend requires messaging to be set up
+ * for the backend to work correctly.
+ */
+bool smbconf_backend_requires_messaging(struct smbconf_ctx *ctx)
+{
+	return ctx->ops->requires_messaging(ctx);
+}
+
+/**
  * Close the configuration.
  */
 void smbconf_shutdown(struct smbconf_ctx *ctx)
diff --git a/source/lib/smbconf/smbconf.h b/source/lib/smbconf/smbconf.h
index e3374766652..3f3435ea009 100644
--- a/source/lib/smbconf/smbconf.h
+++ b/source/lib/smbconf/smbconf.h
@@ -56,6 +56,7 @@ WERROR smbconf_init_txt(TALLOC_CTX *mem_ctx,
 /*
  * the smbconf API functions
  */
+bool smbconf_backend_requires_messaging(struct smbconf_ctx *ctx);
 void smbconf_shutdown(struct smbconf_ctx *ctx);
 bool smbconf_changed(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
 		     const char *service, const char *param);
diff --git a/source/lib/smbconf/smbconf_private.h b/source/lib/smbconf/smbconf_private.h
index 8e7d6a9983e..a47d81fa256 100644
--- a/source/lib/smbconf/smbconf_private.h
+++ b/source/lib/smbconf/smbconf_private.h
@@ -23,6 +23,7 @@
 struct smbconf_ops {
 	WERROR (*init)(struct smbconf_ctx *ctx, const char *path);
 	int (*shutdown)(struct smbconf_ctx *ctx);
+	bool (*requires_messaging)(struct smbconf_ctx *ctx);
 	WERROR (*open_conf)(struct smbconf_ctx *ctx);
 	int (*close_conf)(struct smbconf_ctx *ctx);
 	void (*get_csn)(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
diff --git a/source/lib/smbconf/smbconf_reg.c b/source/lib/smbconf/smbconf_reg.c
index 033f800e2a3..cfe874df49d 100644
--- a/source/lib/smbconf/smbconf_reg.c
+++ b/source/lib/smbconf/smbconf_reg.c
@@ -642,6 +642,16 @@ static int smbconf_reg_shutdown(struct smbconf_ctx *ctx)
 	return ctx->ops->close_conf(ctx);
 }
 
+static bool smbconf_reg_requires_messaging(struct smbconf_ctx *ctx)
+{
+#ifdef CLUSTER_SUPPORT
+	if (lp_clustering() && lp_parm_bool(-1, "ctdb", "registry.tdb", true)) {
+		return true;
+	}
+#endif
+	return false;
+}
+
 static WERROR smbconf_reg_open(struct smbconf_ctx *ctx)
 {
 	WERROR werr;
@@ -1119,6 +1129,7 @@ done:
 struct smbconf_ops smbconf_ops_reg = {
 	.init			= smbconf_reg_init,
 	.shutdown		= smbconf_reg_shutdown,
+	.requires_messaging	= smbconf_reg_requires_messaging,
 	.open_conf		= smbconf_reg_open,
 	.close_conf		= smbconf_reg_close,
 	.get_csn		= smbconf_reg_get_csn,
diff --git a/source/lib/smbconf/smbconf_txt.c b/source/lib/smbconf/smbconf_txt.c
index 1a29f401649..7a6f510d5d9 100644
--- a/source/lib/smbconf/smbconf_txt.c
+++ b/source/lib/smbconf/smbconf_txt.c
@@ -243,6 +243,11 @@ static int smbconf_txt_shutdown(struct smbconf_ctx *ctx)
 	return ctx->ops->close_conf(ctx);
 }
 
+static bool smbconf_txt_requires_messaging(struct smbconf_ctx *ctx)
+{
+	return false;
+}
+
 static WERROR smbconf_txt_open(struct smbconf_ctx *ctx)
 {
 	return smbconf_txt_load_file(ctx);
@@ -604,6 +609,7 @@ static WERROR smbconf_txt_delete_includes(struct smbconf_ctx *ctx,
 static struct smbconf_ops smbconf_ops_txt = {
 	.init			= smbconf_txt_init,
 	.shutdown		= smbconf_txt_shutdown,
+	.requires_messaging	= smbconf_txt_requires_messaging,
 	.open_conf		= smbconf_txt_open,
 	.close_conf		= smbconf_txt_close,
 	.get_csn		= smbconf_txt_get_csn,
-- 
2.11.4.GIT