device-mapper-multipath/0001-RH-queue-without-daemon.patch

From 8191fb07d8212e29ad44370abb60e174e1c34bb5 Mon Sep 17 00:00:00 2001
From: Fabio M. Di Nitto <fdinitto@redhat.com>
Date: Tue, 13 Oct 2009 08:15:15 +0200
Subject: [PATCH 01/12] RH: queue without daemon

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
---
:100644 100644 50a728c... 86b1320... M	libmultipath/config.h
:100644 100644 ee4de68... 7888e8e... M	libmultipath/dict.c
:100644 100644 afd1246... 2e7a0d1... M	libmultipath/structs.h
:100644 100644 c222da4... 9afa615... M	multipath.conf.annotated
:100644 100644 3e0fd6e... 44d1329... M	multipath.conf.synthetic
:100644 100644 41a9bd0... 90de6df... M	multipathd/main.c
 libmultipath/config.h    |    1 +
 libmultipath/dict.c      |   35 +++++++++++++++++++++++++++++++++++
 libmultipath/structs.h   |    6 ++++++
 multipath.conf.annotated |    9 +++++++++
 multipath.conf.synthetic |    1 +
 multipathd/main.c        |    5 +++++
 6 files changed, 57 insertions(+), 0 deletions(-)

Index: multipath-tools/libmultipath/config.h
===================================================================
--- multipath-tools.orig/libmultipath/config.h
+++ multipath-tools/libmultipath/config.h
@@ -74,6 +74,7 @@ struct config {
 	int pg_timeout;
 	int max_fds;
 	int force_reload;
+	int queue_without_daemon;
 	int daemon;
 	int flush_on_last_del;
 	int attribute_flags;
Index: multipath-tools/libmultipath/dict.c
===================================================================
--- multipath-tools.orig/libmultipath/dict.c
+++ multipath-tools/libmultipath/dict.c
@@ -362,6 +362,28 @@ def_no_path_retry_handler(vector strvec)
 }
 
 static int
+def_queue_without_daemon(vector strvec)
+{
+	char * buff;
+
+	buff = set_value(strvec);
+	if (!buff)
+		return 1;
+
+	if (!strncmp(buff, "off", 3) || !strncmp(buff, "no", 2) ||
+	    !strncmp(buff, "0", 1))
+		conf->queue_without_daemon = QUE_NO_DAEMON_OFF;
+	else if (!strncmp(buff, "on", 2) || !strncmp(buff, "yes", 3) ||
+		 !strncmp(buff, "1", 1))
+		conf->queue_without_daemon = QUE_NO_DAEMON_ON;
+	else
+		conf->queue_without_daemon = QUE_NO_DAEMON_UNDEF;
+
+	free(buff);
+	return 0;
+}
+
+static int
 def_pg_timeout_handler(vector strvec)
 {
 	int pg_timeout;
@@ -1944,6 +1966,18 @@ snprint_def_no_path_retry (char * buff, 
 }
 
 static int
+snprint_def_queue_without_daemon (char * buff, int len, void * data)
+{
+	switch (conf->queue_without_daemon) {
+	case QUE_NO_DAEMON_OFF:
+		return snprintf(buff, len, "no");
+	case QUE_NO_DAEMON_ON:
+		return snprintf(buff, len, "yes");
+	}
+	return 0;
+}
+
+static int
 snprint_def_pg_timeout (char * buff, int len, void * data)
 {
 	if (conf->pg_timeout == DEFAULT_PGTIMEOUT)
@@ -2029,6 +2063,7 @@ init_keywords(void)
 	install_keyword("max_fds", &max_fds_handler, &snprint_max_fds);
 	install_keyword("rr_weight", &def_weight_handler, &snprint_def_rr_weight);
 	install_keyword("no_path_retry", &def_no_path_retry_handler, &snprint_def_no_path_retry);
+	install_keyword("queue_without_daemon", &def_queue_without_daemon, &snprint_def_queue_without_daemon);
 	install_keyword("pg_timeout", &def_pg_timeout_handler, &snprint_def_pg_timeout);
 	install_keyword("flush_on_last_del", &def_flush_on_last_del_handler, &snprint_def_flush_on_last_del);
 	install_keyword("user_friendly_names", &names_handler, &snprint_def_user_friendly_names);
Index: multipath-tools/libmultipath/structs.h
===================================================================
--- multipath-tools.orig/libmultipath/structs.h
+++ multipath-tools/libmultipath/structs.h
@@ -63,6 +63,12 @@ enum pgstates {
 	PGSTATE_ACTIVE
 };
 
+enum queue_without_daemon_states {
+	QUE_NO_DAEMON_UNDEF,
+	QUE_NO_DAEMON_OFF,
+	QUE_NO_DAEMON_ON,
+};
+
 enum pgtimeouts {
 	PGTIMEOUT_UNDEF,
 	PGTIMEOUT_NONE
Index: multipath-tools/multipath.conf.annotated
===================================================================
--- multipath-tools.orig/multipath.conf.annotated
+++ multipath-tools/multipath.conf.annotated
@@ -153,6 +153,15 @@
 #	no_path_retry  queue
 #
 #	#
+#	# name    : queue_without_daemon
+#	# scope   : multipathd
+#	# desc    : If set to "no", multipathd will disable queueing for all
+#	#           devices when it is shut down.
+#	# values  : yes|no
+#	# default : yes
+#	queue_without_daemon	no
+#
+#	#
 #	# name    : user_friendly_names
 #	# scope   : multipath
 #	# desc    : If set to "yes", using the bindings file
Index: multipath-tools/multipath.conf.synthetic
===================================================================
--- multipath-tools.orig/multipath.conf.synthetic
+++ multipath-tools/multipath.conf.synthetic
@@ -16,6 +16,7 @@
 #	rr_weight		priorities
 #	failback		immediate
 #	no_path_retry		fail
+#	queue_without_daemon    no
 #	user_friendly_names	no
 #	mode			644
 #	uid			0
Index: multipath-tools/multipathd/main.c
===================================================================
--- multipath-tools.orig/multipathd/main.c
+++ multipath-tools/multipathd/main.c
@@ -1334,6 +1334,8 @@ child (void * param)
 	pthread_t check_thr, uevent_thr, uxlsnr_thr;
 	pthread_attr_t log_attr, misc_attr;
 	struct vectors * vecs;
+	struct multipath * mpp;
+	int i;
 
 	mlockall(MCL_CURRENT | MCL_FUTURE);
 
@@ -1422,6 +1424,9 @@ child (void * param)
 	 */
 	block_signal(SIGHUP, NULL);
 	lock(vecs->lock);
+	if (conf->queue_without_daemon == QUE_NO_DAEMON_OFF)
+		vector_foreach_slot(vecs->mpvec, mpp, i)
+			dm_queue_if_no_path(mpp->alias, 0);
 	remove_maps_and_stop_waiters(vecs);
 	free_pathvec(vecs->pathvec, FREE_PATHS);