From 315288471f44c0fc8df9b9906443b8b7da671696 Mon Sep 17 00:00:00 2001
From: Christophe Varoqui <root@xa-s05.(none)>
Date: Tue, 17 Jan 2006 10:08:49 +0100
Subject: [PATCH] [multipathd] add "show config" CLI command

This commands dumps a multipath.conf config file.

The "defaults" section is factorized : settings in sync with the internal
defaults are not printed.

The "devices" section lists the internal hwtable, plus mods and adds from
the actual config file. The layout is factorized : settings in sync with
the "defaults" section are not printed.

The "devnode_blacklist" section is ommited for now, as this requires a bit
more infrastructure.

The "multipaths" section is not factorized as we can not reliably guess the
hardware a multipath is parented to. Multipath entries are just clones
of their actual config file equivalent.
---
 libmultipath/dict.c       | 588 ++++++++++++++++++++++++++++++++++++++++++----
 libmultipath/dict.h       |   2 +-
 libmultipath/discovery.c  |   2 +
 libmultipath/parser.c     |  87 ++++++-
 libmultipath/parser.h     |  21 +-
 libmultipath/print.c      | 185 ++++++++++++++-
 libmultipath/print.h      |   5 +
 multipathd/cli.c          |   1 +
 multipathd/cli.h          |   2 +
 multipathd/cli_handlers.c |  52 +++-
 multipathd/cli_handlers.h |   1 +
 multipathd/main.c         |   1 +
 12 files changed, 875 insertions(+), 72 deletions(-)

diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 4231991..9b782de 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -1,6 +1,6 @@
 /*
  * Based on Alexandre Cassen template for keepalived
- * Copyright (c) 2004, 2005 Christophe Varoqui
+ * Copyright (c) 2004, 2005, 2006  Christophe Varoqui
  * Copyright (c) 2005 Benjamin Marzinski, Redhat
  * Copyright (c) 2005 Kiyoshi Ueda, NEC
  */
@@ -719,70 +719,558 @@ mp_minio_handler(vector strvec)
 	return 0;
 }
 
-vector
-init_keywords(void)
+/*
+ * config file keywords printing
+ */
+static int
+snprint_mp_wwid (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	return snprintf(buff, len, "%s", mpe->wwid);
+}
+
+static int
+snprint_mp_alias (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->alias)
+		return 0;
+
+	if (conf->user_friendly_names &&
+	    (strlen(mpe->alias) == strlen("mpath")) &&
+	    !strcmp(mpe->alias, "mpath"))
+		return 0;
+
+	return snprintf(buff, len, "%s", mpe->alias);
+}
+
+static int
+snprint_mp_path_grouping_policy (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+	char str[POLICY_NAME_SIZE];
+
+	if (!mpe->pgpolicy)
+		return 0;
+	get_pgpolicy_name(str, POLICY_NAME_SIZE, mpe->pgpolicy);
+	
+	return snprintf(buff, len, "%s", str);
+}
+
+static int
+snprint_mp_selector (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->selector)
+		return 0;
+
+	return snprintf(buff, len, "%s", mpe->selector);
+}
+
+static int
+snprint_mp_failback (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->pgfailback)
+		return 0;
+
+	switch(mpe->pgfailback) {
+	case  FAILBACK_UNDEF:
+		break;
+	case -FAILBACK_MANUAL:
+		return snprintf(buff, len, "manual");
+	case -FAILBACK_IMMEDIATE:
+		return snprintf(buff, len, "immediate");
+	default:
+		return snprintf(buff, len, "%i", mpe->pgfailback);
+	}
+	return 0;
+}
+
+static int
+snprint_mp_rr_weight (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->rr_weight)
+		return 0;
+	if (mpe->rr_weight == RR_WEIGHT_PRIO)
+		return snprintf(buff, len, "priorities");
+
+	return 0;
+}
+
+static int
+snprint_mp_no_path_retry (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->no_path_retry)
+		return 0;
+
+	switch(mpe->no_path_retry) {
+	case NO_PATH_RETRY_UNDEF:
+		break;
+	case NO_PATH_RETRY_FAIL:
+		return snprintf(buff, len, "fail");
+	case NO_PATH_RETRY_QUEUE:
+		return snprintf(buff, len, "queue");
+	default:
+		return snprintf(buff, len, "%i",
+				mpe->no_path_retry);
+	}
+	return 0;
+}
+
+static int
+snprint_mp_rr_min_io (char * buff, int len, void * data)
+{
+	struct mpentry * mpe = (struct mpentry *)data;
+
+	if (!mpe->minio)
+		return 0;
+
+	return snprintf(buff, len, "%u", mpe->minio);
+}
+
+static int
+snprint_hw_vendor (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->vendor)
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->vendor);
+}
+
+static int
+snprint_hw_product (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->product)
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->product);
+}
+
+static int
+snprint_hw_getuid_callout (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->getuid)
+		return 0;
+	if (strlen(hwe->getuid) == strlen(conf->default_getuid) &&
+	    !strcmp(hwe->getuid, conf->default_getuid))
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->getuid);
+}
+
+static int
+snprint_hw_prio_callout (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->getprio)
+		return 0;
+	if (strlen(hwe->getprio) == strlen(conf->default_getprio) &&
+	    !strcmp(hwe->getprio, conf->default_getprio))
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->getprio);
+}
+
+static int
+snprint_hw_features (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->features)
+		return 0;
+	if (strlen(hwe->features) == strlen(conf->features) &&
+	    !strcmp(hwe->features, conf->features))
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->features);
+}
+
+static int
+snprint_hw_hardware_handler (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->hwhandler)
+		return 0;
+	if (strlen(hwe->hwhandler) == strlen(conf->default_hwhandler) &&
+	    !strcmp(hwe->hwhandler, conf->default_hwhandler))
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->hwhandler);
+}
+
+static int
+snprint_hw_selector (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->selector)
+		return 0;
+	if (strlen(hwe->selector) == strlen(conf->selector) &&
+	    !strcmp(hwe->selector, conf->selector))
+		return 0;
+
+	return snprintf(buff, len, "%s", hwe->selector);
+}
+
+static int
+snprint_hw_path_grouping_policy (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	char str[POLICY_NAME_SIZE];
+
+	if (!hwe->pgpolicy)
+		return 0;
+	if (hwe->pgpolicy == conf->default_pgpolicy)
+		return 0;
+
+	get_pgpolicy_name(str, POLICY_NAME_SIZE, hwe->pgpolicy);
+	
+	return snprintf(buff, len, "%s", str);
+}
+
+static int
+snprint_hw_failback (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->pgfailback)
+		return 0;
+	if (hwe->pgfailback == conf->pgfailback)
+		return 0;
+
+	switch(hwe->pgfailback) {
+	case  FAILBACK_UNDEF:
+		break;
+	case -FAILBACK_MANUAL:
+		return snprintf(buff, len, "manual");
+	case -FAILBACK_IMMEDIATE:
+		return snprintf(buff, len, "immediate");
+	default:
+		return snprintf(buff, len, "%i", hwe->pgfailback);
+	}
+	return 0;
+}
+
+static int
+snprint_hw_rr_weight (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->rr_weight)
+		return 0;
+	if (hwe->rr_weight == conf->rr_weight)
+		return 0;
+	if (hwe->rr_weight == RR_WEIGHT_PRIO)
+		return snprintf(buff, len, "priorities");
+
+	return 0;
+}
+
+static int
+snprint_hw_no_path_retry (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->no_path_retry)
+		return 0;
+	if (hwe->no_path_retry == conf->no_path_retry)
+		return 0;
+
+	switch(hwe->no_path_retry) {
+	case NO_PATH_RETRY_UNDEF:
+		break;
+	case NO_PATH_RETRY_FAIL:
+		return snprintf(buff, len, "fail");
+	case NO_PATH_RETRY_QUEUE:
+		return snprintf(buff, len, "queue");
+	default:
+		return snprintf(buff, len, "%i",
+				hwe->no_path_retry);
+	}
+	return 0;
+}
+
+static int
+snprint_hw_rr_min_io (char * buff, int len, void * data)
+{
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->minio)
+		return 0;
+	if (hwe->minio == conf->minio)
+		return 0;
+
+	return snprintf(buff, len, "%u", hwe->minio);
+}
+
+static int
+snprint_hw_path_checker (char * buff, int len, void * data)
+{
+	char str[CHECKER_NAME_SIZE];
+	struct hwentry * hwe = (struct hwentry *)data;
+
+	if (!hwe->checker_index)
+		return 0;
+	if (hwe->checker_index == conf->default_checker_index)
+		return 0;
+	get_checker_name(str, CHECKER_NAME_SIZE, hwe->checker_index);
+	
+	return snprintf(buff, len, "%s", str);
+}
+
+static int
+snprint_def_polling_interval (char * buff, int len, void * data)
+{
+	if (conf->checkint == DEFAULT_CHECKINT)
+		return 0;
+	return snprintf(buff, len, "%i", conf->checkint);
+}
+
+static int
+snprint_def_udev_dir (char * buff, int len, void * data)
+{
+	if (!conf->udev_dir)
+		return 0;
+	if (strlen(DEFAULT_UDEVDIR) == strlen(conf->udev_dir) &&
+	    !strcmp(conf->udev_dir, DEFAULT_UDEVDIR))
+		return 0;
+
+	return snprintf(buff, len, "%s", conf->udev_dir);
+}
+
+static int
+snprint_def_selector (char * buff, int len, void * data)
+{
+	if (!conf->selector)
+		return 0;
+	if (strlen(conf->selector) == strlen(DEFAULT_SELECTOR) &&
+	    !strcmp(conf->selector, DEFAULT_SELECTOR))
+		return 0;
+
+	return snprintf(buff, len, "%s", conf->selector);
+}
+
+static int
+snprint_def_path_grouping_policy (char * buff, int len, void * data)
+{
+	char str[POLICY_NAME_SIZE];
+
+	if (!conf->default_pgpolicy)
+		return 0;
+	if (conf->default_pgpolicy == DEFAULT_PGPOLICY)
+		return 0;
+
+	get_pgpolicy_name(str, POLICY_NAME_SIZE, conf->default_pgpolicy);
+	
+	return snprintf(buff, len, "%s", str);
+}
+
+static int
+snprint_def_getuid_callout (char * buff, int len, void * data)
+{
+	if (!conf->default_getuid)
+		return 0;
+	if (strlen(conf->default_getuid) == strlen(DEFAULT_GETUID) &&
+	    !strcmp(conf->default_getuid, DEFAULT_GETUID))
+		return 0;
+
+	return snprintf(buff, len, "%s", conf->default_getuid);
+}
+
+static int
+snprint_def_getprio_callout (char * buff, int len, void * data)
+{
+	if (!conf->default_getprio)
+		return 0;
+#if 0 /* default is NULL */
+	if (strlen(conf->default_getprio) == strlen(DEFAULT_GETPRIO) &&
+	    !strcmp(conf->default_getprio, DEFAULT_GETPRIO))
+		return 0;
+#endif
+
+	return snprintf(buff, len, "%s", conf->default_getprio);
+}
+
+static int
+snprint_def_features (char * buff, int len, void * data)
+{
+	if (!conf->features)
+		return 0;
+	if (strlen(conf->features) == strlen(DEFAULT_FEATURES) &&
+	    !strcmp(conf->features, DEFAULT_FEATURES))
+		return 0;
+
+	return snprintf(buff, len, "%s", conf->features);
+}
+
+static int
+snprint_def_path_checker (char * buff, int len, void * data)
+{
+	char str[CHECKER_NAME_SIZE];
+
+	if (!conf->default_checker_index)
+		return 0;
+	if (conf->default_checker_index == DEFAULT_CHECKER_ID)
+		return 0;
+	get_checker_name(str, CHECKER_NAME_SIZE, conf->default_checker_index);
+	
+	return snprintf(buff, len, "%s", str);
+}
+
+static int
+snprint_def_failback (char * buff, int len, void * data)
+{
+	if (!conf->pgfailback)
+		return 0;
+	if (conf->pgfailback == DEFAULT_FAILBACK)
+		return 0;
+
+	switch(conf->pgfailback) {
+	case  FAILBACK_UNDEF:
+		break;
+	case -FAILBACK_MANUAL:
+		return snprintf(buff, len, "manual");
+	case -FAILBACK_IMMEDIATE:
+		return snprintf(buff, len, "immediate");
+	default:
+		return snprintf(buff, len, "%i", conf->pgfailback);
+	}
+	return 0;
+}
+
+static int
+snprint_def_rr_min_io (char * buff, int len, void * data)
+{
+	if (!conf->minio)
+		return 0;
+	if (conf->minio == DEFAULT_MINIO)
+		return 0;
+
+	return snprintf(buff, len, "%u", conf->minio);
+}
+
+static int
+snprint_def_rr_weight (char * buff, int len, void * data)
 {
-	keywords = vector_alloc();
+	if (!conf->rr_weight)
+		return 0;
+	if (conf->rr_weight == DEFAULT_RR_WEIGHT)
+		return 0;
+	if (conf->rr_weight == RR_WEIGHT_PRIO)
+		return snprintf(buff, len, "priorities");
 
+	return 0;
+}
+
+static int
+snprint_def_no_path_retry (char * buff, int len, void * data)
+{
+	if (conf->no_path_retry == DEFAULT_NO_PATH_RETRY)
+		return 0;
+
+	switch(conf->no_path_retry) {
+	case NO_PATH_RETRY_UNDEF:
+		break;
+	case NO_PATH_RETRY_FAIL:
+		return snprintf(buff, len, "fail");
+	case NO_PATH_RETRY_QUEUE:
+		return snprintf(buff, len, "queue");
+	default:
+		return snprintf(buff, len, "%i",
+				conf->no_path_retry);
+	}
+	return 0;
+}
+
+static int
+snprint_def_user_friendly_names (char * buff, int len, void * data)
+{
+	if (conf->user_friendly_names == DEFAULT_USER_FRIENDLY_NAMES)
+		return 0;
+	if (!conf->user_friendly_names)
+		return snprintf(buff, len, "no");
+
+	return snprintf(buff, len, "yes");
+}
+
+void
+init_keywords(void)
+{
 	install_keyword_root("defaults", NULL);
-	install_keyword("polling_interval", &polling_interval_handler);
-	install_keyword("udev_dir", &udev_dir_handler);
-	install_keyword("selector", &def_selector_handler);
-	install_keyword("path_grouping_policy", &def_pgpolicy_handler);
-	install_keyword("getuid_callout", &def_getuid_callout_handler);
-	install_keyword("prio_callout", &def_prio_callout_handler);
-	install_keyword("features", &def_features_handler);
-	install_keyword("path_checker", &def_path_checker_handler);
-	install_keyword("failback", &default_failback_handler);
-	install_keyword("rr_min_io", &def_minio_handler);
-	install_keyword("rr_weight", &def_weight_handler);
-	install_keyword("no_path_retry", &def_no_path_retry_handler);
-	install_keyword("user_friendly_names", &names_handler);
+	install_keyword("polling_interval", &polling_interval_handler, &snprint_def_polling_interval);
+	install_keyword("udev_dir", &udev_dir_handler, &snprint_def_udev_dir);
+	install_keyword("selector", &def_selector_handler, &snprint_def_selector);
+	install_keyword("path_grouping_policy", &def_pgpolicy_handler, &snprint_def_path_grouping_policy);
+	install_keyword("getuid_callout", &def_getuid_callout_handler, &snprint_def_getuid_callout);
+	install_keyword("prio_callout", &def_prio_callout_handler, &snprint_def_getprio_callout);
+	install_keyword("features", &def_features_handler, &snprint_def_features);
+	install_keyword("path_checker", &def_path_checker_handler, &snprint_def_path_checker);
+	install_keyword("failback", &default_failback_handler, &snprint_def_failback);
+	install_keyword("rr_min_io", &def_minio_handler, &snprint_def_rr_min_io);
+	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("user_friendly_names", &names_handler, &snprint_def_user_friendly_names);
 
 	/*
 	 * deprecated synonyms
 	 */
-	install_keyword("default_selector", &def_selector_handler);
-	install_keyword("default_path_grouping_policy", &def_pgpolicy_handler);
-	install_keyword("default_getuid_callout", &def_getuid_callout_handler);
-	install_keyword("default_prio_callout", &def_prio_callout_handler);
-	install_keyword("default_features", &def_features_handler);
-	install_keyword("default_path_checker", &def_path_checker_handler);
+	install_keyword("default_selector", &def_selector_handler, NULL);
+	install_keyword("default_path_grouping_policy", &def_pgpolicy_handler, NULL);
+	install_keyword("default_getuid_callout", &def_getuid_callout_handler, NULL);
+	install_keyword("default_prio_callout", &def_prio_callout_handler, NULL);
+	install_keyword("default_features", &def_features_handler, NULL);
+	install_keyword("default_path_checker", &def_path_checker_handler, NULL);
 
 	install_keyword_root("devnode_blacklist", &blacklist_handler);
-	install_keyword("devnode", &ble_handler);
-	install_keyword("wwid", &ble_handler);
+	install_keyword("devnode", &ble_handler, NULL);
+	install_keyword("wwid", &ble_handler, NULL);
 
 	install_keyword_root("devices", &devices_handler);
-	install_keyword("device", &device_handler);
+	install_keyword("device", &device_handler, NULL);
 	install_sublevel();
-	install_keyword("vendor", &vendor_handler);
-	install_keyword("product", &product_handler);
-	install_keyword("path_grouping_policy", &hw_pgpolicy_handler);
-	install_keyword("getuid_callout", &hw_getuid_callout_handler);
-	install_keyword("path_selector", &hw_selector_handler);
-	install_keyword("path_checker", &hw_path_checker_handler);
-	install_keyword("features", &hw_features_handler);
-	install_keyword("hardware_handler", &hw_handler_handler);
-	install_keyword("prio_callout", &prio_callout_handler);
-	install_keyword("failback", &hw_failback_handler);
-	install_keyword("rr_weight", &hw_weight_handler);
-	install_keyword("no_path_retry", &hw_no_path_retry_handler);
-	install_keyword("rr_min_io", &hw_minio_handler);
+	install_keyword("vendor", &vendor_handler, &snprint_hw_vendor);
+	install_keyword("product", &product_handler, &snprint_hw_product);
+	install_keyword("path_grouping_policy", &hw_pgpolicy_handler, &snprint_hw_path_grouping_policy);
+	install_keyword("getuid_callout", &hw_getuid_callout_handler, &snprint_hw_getuid_callout);
+	install_keyword("path_selector", &hw_selector_handler, &snprint_hw_selector);
+	install_keyword("path_checker", &hw_path_checker_handler, &snprint_hw_path_checker);
+	install_keyword("features", &hw_features_handler, &snprint_hw_features);
+	install_keyword("hardware_handler", &hw_handler_handler, &snprint_hw_hardware_handler);
+	install_keyword("prio_callout", &prio_callout_handler, &snprint_hw_prio_callout);
+	install_keyword("failback", &hw_failback_handler, &snprint_hw_failback);
+	install_keyword("rr_weight", &hw_weight_handler, &snprint_hw_rr_weight);
+	install_keyword("no_path_retry", &hw_no_path_retry_handler, &snprint_hw_no_path_retry);
+	install_keyword("rr_min_io", &hw_minio_handler, &snprint_hw_rr_min_io);
 	install_sublevel_end();
 
 	install_keyword_root("multipaths", &multipaths_handler);
-	install_keyword("multipath", &multipath_handler);
+	install_keyword("multipath", &multipath_handler, NULL);
 	install_sublevel();
-	install_keyword("wwid", &wwid_handler);
-	install_keyword("alias", &alias_handler);
-	install_keyword("path_grouping_policy", &mp_pgpolicy_handler);
-	install_keyword("path_selector", &mp_selector_handler);
-	install_keyword("failback", &mp_failback_handler);
-	install_keyword("rr_weight", &mp_weight_handler);
-	install_keyword("no_path_retry", &mp_no_path_retry_handler);
-	install_keyword("rr_min_io", &mp_minio_handler);
+	install_keyword("wwid", &wwid_handler, &snprint_mp_wwid);
+	install_keyword("alias", &alias_handler, &snprint_mp_alias);
+	install_keyword("path_grouping_policy", &mp_pgpolicy_handler, &snprint_mp_path_grouping_policy);
+	install_keyword("path_selector", &mp_selector_handler, &snprint_mp_selector);
+	install_keyword("failback", &mp_failback_handler, &snprint_mp_failback);
+	install_keyword("rr_weight", &mp_weight_handler, &snprint_mp_rr_weight);
+	install_keyword("no_path_retry", &mp_no_path_retry_handler, &snprint_mp_no_path_retry);
+	install_keyword("rr_min_io", &mp_minio_handler, &snprint_mp_rr_min_io);
 	install_sublevel_end();
-
-	return keywords;
 }
diff --git a/libmultipath/dict.h b/libmultipath/dict.h
index ac35edc..5f77473 100644
--- a/libmultipath/dict.h
+++ b/libmultipath/dict.h
@@ -5,6 +5,6 @@
 #include "vector.h"
 #endif
 
-vector init_keywords(void);
+void init_keywords(void);
 
 #endif /* _DICT_H */
diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 7abda4e..ff6a12d 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -689,6 +689,8 @@ pathinfo (struct path *pp, vector hwtable, int mask)
 	if (mask & DI_CHECKER) {
 		if (!pp->checkfn)
 			select_checkfn(pp);
+		if (!pp->checkfn)
+			goto out;
 
 		pp->state = pp->checkfn(pp->fd, NULL, NULL);
 		condlog(3, "state = %i", pp->state);
diff --git a/libmultipath/parser.c b/libmultipath/parser.c
index ebb14cd..9b0b5c2 100644
--- a/libmultipath/parser.c
+++ b/libmultipath/parser.c
@@ -24,9 +24,11 @@
 
 /* local vars */
 static int sublevel = 0;
+vector keywords = NULL;
 
 int
-keyword_alloc(vector keywords, char *string, int (*handler) (vector))
+keyword_alloc(vector keywords, char *string, int (*handler) (vector),
+		int (*print) (char *, int, void *))
 {
 	struct keyword *keyword;
 
@@ -41,6 +43,7 @@ keyword_alloc(vector keywords, char *string, int (*handler) (vector))
 	}
 	keyword->string = string;
 	keyword->handler = handler;
+	keyword->print = print;
 
 	vector_set_slot(keywords, keyword);
 
@@ -50,7 +53,7 @@ keyword_alloc(vector keywords, char *string, int (*handler) (vector))
 int
 install_keyword_root(char *string, int (*handler) (vector))
 {
-	return keyword_alloc(keywords, string, handler);
+	return keyword_alloc(keywords, string, handler, NULL);
 }
 
 void
@@ -66,7 +69,8 @@ install_sublevel_end(void)
 }
 
 int
-install_keyword(char *string, int (*handler) (vector))
+install_keyword(char *string, int (*handler) (vector),
+		int (*print) (char *, int, void *))
 {
 	int i = 0;
 	struct keyword *keyword;
@@ -87,7 +91,7 @@ install_keyword(char *string, int (*handler) (vector))
 		return 1;
 
 	/* add new sub keyword */
-	return keyword_alloc(keyword->sub, string, handler);
+	return keyword_alloc(keyword->sub, string, handler, print);
 }
 
 void
@@ -105,6 +109,73 @@ free_keywords(vector keywords)
 	vector_free(keywords);
 }
 
+struct keyword *
+find_keyword(vector v, char * name)
+{
+	struct keyword *keyword;
+	int i;
+	int len;
+
+	if (!name || !keywords)
+		return NULL;
+
+	if (!v)
+		v = keywords;
+
+	len = strlen(name);
+
+	for (i = 0; i < VECTOR_SIZE(v); i++) {
+		keyword = VECTOR_SLOT(v, i);
+		if ((strlen(keyword->string) == len) &&
+		    !strcmp(keyword->string, name))
+			return keyword;
+		if (keyword->sub) {
+			keyword = find_keyword(keyword->sub, name);
+			if (keyword)
+				return keyword;
+		}
+	}
+	return NULL;
+}
+
+int
+snprint_keyword(char *buff, int len, char *fmt, struct keyword *kw, void *data)
+{
+	int r;
+	int fwd = 0;
+	char *f = fmt;
+
+	if (!kw || !kw->print)
+		return 0;
+
+	do {
+		if (fwd == len || *f == '\0')
+			break;
+		if (*f != '%') {
+			*(buff + fwd) = *f;
+			fwd++;
+			continue;
+		}
+		f++;
+		switch(*f) {
+		case 'k':
+			fwd += snprintf(buff + fwd, len - fwd, kw->string);
+			break;
+		case 'v':
+			r = kw->print(buff + fwd, len - fwd, data);
+			if (!r) { /* no output if no value */
+				buff = '\0';
+				return 0;
+			}
+			fwd += r;
+			break;
+		}
+		if (fwd > len)
+			fwd = len;
+	} while (*f++);
+	return fwd;
+}
+
 vector
 alloc_strvec(char *string)
 {
@@ -373,10 +444,14 @@ process_stream(vector keywords)
 
 /* Data initialization */
 int
-init_data(char *conf_file, vector (*init_keywords) (void))
+init_data(char *conf_file, void (*init_keywords) (void))
 {
 	int r;
 
+	if (!keywords)
+		keywords = vector_alloc();
+	if (!keywords)
+		return 1;
 	stream = fopen(conf_file, "r");
 	if (!stream) {
 		syslog(LOG_WARNING, "Configuration file open problem");
@@ -394,7 +469,7 @@ init_data(char *conf_file, vector (*init_keywords) (void))
 	/* Stream handling */
 	r = process_stream(keywords);
 	fclose(stream);
-	free_keywords(keywords);
+	//free_keywords(keywords);
 
 	return r;
 }
diff --git a/libmultipath/parser.h b/libmultipath/parser.h
index 7a6dd18..f0fdd94 100644
--- a/libmultipath/parser.h
+++ b/libmultipath/parser.h
@@ -42,24 +42,30 @@
 struct keyword {
 	char *string;
 	int (*handler) (vector);
+	int (*print) (char *, int, void *);
 	vector sub;
 };
 
+/* global var exported */
+FILE *stream;
+
 /* Reloading helpers */
 #define SET_RELOAD      (reload = 1)
 #define UNSET_RELOAD    (reload = 0)
 #define RELOAD_DELAY    5
 
-/* global var exported */
-vector keywords;
-FILE *stream;
+/* iterator helper */
+#define iterate_sub_keywords(k,p,i) \
+	for (i = 0; i < (k)->sub->allocated && ((p) = (k)->sub->slot[i]); i++)
 
 /* Prototypes */
-extern int keyword_alloc(vector keywords, char *string, int (*handler) (vector));
+extern int keyword_alloc(vector keywords, char *string, int (*handler) (vector),
+			 int (*print) (char *, int, void *));
 extern int install_keyword_root(char *string, int (*handler) (vector));
 extern void install_sublevel(void);
 extern void install_sublevel_end(void);
-extern int install_keyword(char *string, int (*handler) (vector));
+extern int install_keyword(char *string, int (*handler) (vector),
+			   int (*print) (char *, int, void *));
 extern void dump_keywords(vector keydump, int level);
 extern void free_keywords(vector keywords);
 extern vector alloc_strvec(char *string);
@@ -68,6 +74,9 @@ extern vector read_value_block(void);
 extern int alloc_value_block(vector strvec, void (*alloc_func) (vector));
 extern void *set_value(vector strvec);
 extern int process_stream(vector keywords);
-extern int init_data(char *conf_file, vector (*init_keywords) (void));
+extern int init_data(char *conf_file, void (*init_keywords) (void));
+extern struct keyword * find_keyword(vector v, char * name);
+int snprint_keyword(char *buff, int len, char *fmt, struct keyword *kw,
+		    void *data);
 
 #endif
diff --git a/libmultipath/print.c b/libmultipath/print.c
index 0cdf936..430aacb 100644
--- a/libmultipath/print.c
+++ b/libmultipath/print.c
@@ -4,6 +4,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <libdevmapper.h>
+#include <stdarg.h>
 
 #include "vector.h"
 #include "structs.h"
@@ -11,9 +12,13 @@
 #include "print.h"
 #include "dmparser.h"
 #include "configure.h"
+#include "config.h"
+#include "pgpolicies.h"
 #include "defaults.h"
+#include "parser.h"
 
 #include "../libcheckers/path_state.h"
+#include "../libcheckers/checkers.h"
 
 #define MAX(x,y) (x > y) ? x : y
 #define TAIL     (line + len - 1 - c)
@@ -647,10 +652,8 @@ snprint_multipath_topology (char * buff, int len, struct multipath * mpp,
 	if (verbosity <= 0)
 		return fwd;
 
-	if (verbosity == 1) {
-		fwd += snprint_multipath(buff + fwd, len - fwd, "%n", mpp);
-		return fwd;
-	}
+	if (verbosity == 1)
+		return snprint_multipath(buff, len, "%n", mpp);
 
 	if (verbosity > 1 &&
 	    mpp->action != ACT_NOTHING &&
@@ -663,8 +666,12 @@ snprint_multipath_topology (char * buff, int len, struct multipath * mpp,
 		c += sprintf(c, " (%%w)");
 
 	fwd += snprint_multipath(buff + fwd, len - fwd, style, mpp);
+	if (fwd > len)
+		return len;
 	fwd += snprint_multipath(buff + fwd, len - fwd,
 				 "[size=%S][features=%f][hwhandler=%h]", mpp);
+	if (fwd > len)
+		return len;
 
 	if (!mpp->pg)
 		return fwd;
@@ -673,14 +680,182 @@ snprint_multipath_topology (char * buff, int len, struct multipath * mpp,
 		pgp->selector = mpp->selector; /* hack */
 		fwd += snprint_pathgroup(buff + fwd, len - fwd,
 					 PRINT_PG_INDENT, pgp);
+		if (fwd > len)
+			return len;
 
-		vector_foreach_slot (pgp->paths, pp, i)
+		vector_foreach_slot (pgp->paths, pp, i) {
 			fwd += snprint_path(buff + fwd, len - fwd,
 					    PRINT_PATH_INDENT, pp);
+			if (fwd > len)
+				return len;
+		}
+	}
+	return fwd;
+}
+
+static int
+snprint_hwentry (char * buff, int len, struct hwentry * hwe)
+{
+	int i;
+	int fwd = 0;
+	struct keyword * kw;
+	struct keyword * rootkw;
+
+	rootkw = find_keyword(NULL, "device");
+
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "\tdevice {\n");
+	if (fwd > len)
+		return len;
+	iterate_sub_keywords(rootkw, kw, i) {
+		fwd += snprint_keyword(buff + fwd, len - fwd, "\t\t%k %v\n",
+				kw, hwe);
+		if (fwd > len)
+			return len;
+	}
+	fwd += snprintf(buff + fwd, len - fwd, "\t}\n");
+	if (fwd > len)
+		return len;
+	return fwd;
+}
+
+extern int
+snprint_hwtable (char * buff, int len, vector hwtable)
+{
+	int fwd = 0;
+	int i;
+	struct hwentry * hwe;
+	struct keyword * rootkw;
+
+	rootkw = find_keyword(NULL, "devices");
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "devices {\n");
+	if (fwd > len)
+		return len;
+	vector_foreach_slot (hwtable, hwe, i) {
+		fwd += snprint_hwentry(buff + fwd, len - fwd, hwe);
+		if (fwd > len)
+			return len;
+	}
+	fwd += snprintf(buff + fwd, len - fwd, "}\n");
+	if (fwd > len)
+		return len;
+	return fwd;
+}
+
+static int
+snprint_mpentry (char * buff, int len, struct mpentry * mpe)
+{
+	int i;
+	int fwd = 0;
+	struct keyword * kw;
+	struct keyword * rootkw;
+
+	rootkw = find_keyword(NULL, "multipath");
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "\tmultipath {\n");
+	if (fwd > len)
+		return len;
+	iterate_sub_keywords(rootkw, kw, i) {
+		fwd += snprint_keyword(buff + fwd, len - fwd, "\t\t%k %v\n",
+				kw, mpe);
+		if (fwd > len)
+			return len;
 	}
+	fwd += snprintf(buff + fwd, len - fwd, "\t}\n");
+	if (fwd > len)
+		return len;
 	return fwd;
 }
 
+extern int
+snprint_mptable (char * buff, int len, vector mptable)
+{
+	int fwd = 0;
+	int i;
+	struct mpentry * mpe;
+	struct keyword * rootkw;
+
+	rootkw = find_keyword(NULL, "multipaths");
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "multipaths {\n");
+	if (fwd > len)
+		return len;
+	vector_foreach_slot (mptable, mpe, i) {
+		fwd += snprint_mpentry(buff + fwd, len - fwd, mpe);
+		if (fwd > len)
+			return len;
+	}
+	fwd += snprintf(buff + fwd, len - fwd, "}\n");
+	if (fwd > len)
+		return len;
+	return fwd;
+}
+
+extern int
+snprint_defaults (char * buff, int len)
+{
+	int fwd = 0;
+	int i;
+	struct keyword *rootkw;
+	struct keyword *kw;
+
+	rootkw = find_keyword(NULL, "defaults");
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "defaults {\n");
+	if (fwd > len)
+		return len;
+
+	iterate_sub_keywords(rootkw, kw, i) {
+		fwd += snprint_keyword(buff + fwd, len - fwd, "\t%k %v\n",
+				kw, NULL);
+		if (fwd > len)
+			return len;
+	}
+	fwd += snprintf(buff + fwd, len - fwd, "}\n");
+	if (fwd > len)
+		return len;
+	return fwd;
+	
+}
+
+extern int
+snprint_blacklist (char * buff, int len)
+{
+	int fwd = 0;
+	struct keyword *rootkw;
+
+	rootkw = find_keyword(NULL, "devnode_blacklist");
+	if (!rootkw)
+		return 0;
+
+	fwd += snprintf(buff + fwd, len - fwd, "devnode_blacklist {\n");
+	if (fwd > len)
+		return len;
+
+	fwd += snprintf(buff + fwd, len - fwd, "}\n");
+	if (fwd > len)
+		return len;
+	return fwd;
+	
+}
+
+extern int
+snprint_config (char * buff, int len)
+{
+	return 0;
+}
+
 /*
  * stdout printing helpers
  */
diff --git a/libmultipath/print.h b/libmultipath/print.h
index ea7f3ba..dd97cea 100644
--- a/libmultipath/print.h
+++ b/libmultipath/print.h
@@ -40,6 +40,9 @@ int snprint_path (char *, int, char *, struct path *);
 int snprint_multipath (char *, int, char *, struct multipath *);
 int snprint_multipath_topology (char *, int, struct multipath * mpp,
 				int verbosity);
+int snprint_defaults (char *, int);
+int snprint_hwtable (char *, int, vector);
+int snprint_mptable (char *, int, vector);
 
 void print_multipath_topology (struct multipath * mpp, int verbosity);
 void print_path (struct path * pp, char * style);
@@ -47,3 +50,5 @@ void print_multipath (struct multipath * mpp, char * style);
 void print_pathgroup (struct pathgroup * pgp, char * style);
 void print_map (struct multipath * mpp);
 void print_all_paths (vector pathvec, int banner);
+void print_hwtable (vector hwtable);
+
diff --git a/multipathd/cli.c b/multipathd/cli.c
index c1ac93a..475819b 100644
--- a/multipathd/cli.c
+++ b/multipathd/cli.c
@@ -139,6 +139,7 @@ load_keys (void)
 	r += add_key(keys, "status", STATUS, 0);
 	r += add_key(keys, "stats", STATS, 0);
 	r += add_key(keys, "topology", TOPOLOGY, 0);
+	r += add_key(keys, "config", CONFIG, 0);
 
 	if (r) {
 		free_keys(keys);
diff --git a/multipathd/cli.h b/multipathd/cli.h
index 9c6b1fb..ef1e3b8 100644
--- a/multipathd/cli.h
+++ b/multipathd/cli.h
@@ -16,6 +16,7 @@ enum {
 	__STATUS,
 	__STATS,
 	__TOPOLOGY,
+	__CONFIG,
 };
 
 #define LIST		(1 << __LIST)
@@ -35,6 +36,7 @@ enum {
 #define STATUS		(1 << __STATUS)
 #define STATS		(1 << __STATS)
 #define TOPOLOGY	(1 << __TOPOLOGY)
+#define CONFIG		(1 << __CONFIG)
 
 #define INITIAL_REPLY_LEN 1000
 
diff --git a/multipathd/cli_handlers.c b/multipathd/cli_handlers.c
index 49f2c88..218e042 100644
--- a/multipathd/cli_handlers.c
+++ b/multipathd/cli_handlers.c
@@ -23,7 +23,7 @@ show_paths (char ** r, int * len, struct vectors * vecs, char * style)
 	struct path * pp;
 	char * c;
 	char * reply;
-	int maxlen = INITIAL_REPLY_LEN;
+	unsigned int maxlen = INITIAL_REPLY_LEN;
 	int again = 1;
 
 	get_path_layout(vecs->pathvec);
@@ -59,7 +59,7 @@ show_map_topology (char ** r, int * len, struct multipath * mpp)
 {
 	char * c;
 	char * reply;
-	int maxlen = INITIAL_REPLY_LEN;
+	unsigned int maxlen = INITIAL_REPLY_LEN;
 	int again = 1;
 
 	reply = MALLOC(maxlen);
@@ -89,7 +89,7 @@ show_maps_topology (char ** r, int * len, struct vectors * vecs)
 	struct multipath * mpp;
 	char * c;
 	char * reply;
-	int maxlen = INITIAL_REPLY_LEN;
+	unsigned int maxlen = INITIAL_REPLY_LEN;
 	int again = 1;
 
 	reply = MALLOC(maxlen);
@@ -116,6 +116,50 @@ show_maps_topology (char ** r, int * len, struct vectors * vecs)
 }
 
 int
+show_config (char ** r, int * len)
+{
+	char * c;
+	char * reply;
+	unsigned int maxlen = INITIAL_REPLY_LEN;
+	int again = 1;
+
+	reply = MALLOC(maxlen);
+
+	while (again) {
+		if (!reply)
+			return 1;
+		c = reply;
+		c += snprint_defaults(c, reply + maxlen - c);
+		again = ((c - reply) == maxlen);
+		if (again) {
+			reply = REALLOC(reply, maxlen *= 2);
+			continue;
+		}
+		c += snprint_hwtable(c, reply + maxlen - c, conf->hwtable);
+		again = ((c - reply) == maxlen);
+		if (again) {
+			reply = REALLOC(reply, maxlen *= 2);
+			continue;
+		}
+		c += snprint_mptable(c, reply + maxlen - c, conf->mptable);
+		again = ((c - reply) == maxlen);
+		if (again)
+			reply = REALLOC(reply, maxlen *= 2);
+	}
+	*r = reply;
+	*len = (int)(c - reply + 1);
+	return 0;
+}
+
+int
+cli_list_config (void * v, char ** reply, int * len, void * data)
+{
+	condlog(3, "list config (operator)");
+
+	return show_config(reply, len);
+}
+
+int
 cli_list_paths (void * v, char ** reply, int * len, void * data)
 {
 	struct vectors * vecs = (struct vectors *)data;
@@ -159,7 +203,7 @@ show_maps (char ** r, int *len, struct vectors * vecs, char * style)
 	struct multipath * mpp;
 	char * c;
 	char * reply;
-	int maxlen = INITIAL_REPLY_LEN;
+	unsigned int maxlen = INITIAL_REPLY_LEN;
 	int again = 1;
 
 	get_multipath_layout(vecs->mpvec);
diff --git a/multipathd/cli_handlers.h b/multipathd/cli_handlers.h
index b6a04b0..8768724 100644
--- a/multipathd/cli_handlers.h
+++ b/multipathd/cli_handlers.h
@@ -4,6 +4,7 @@ int cli_list_maps_status (void * v, char ** reply, int * len, void * data);
 int cli_list_maps_stats (void * v, char ** reply, int * len, void * data);
 int cli_list_map_topology (void * v, char ** reply, int * len, void * data);
 int cli_list_maps_topology (void * v, char ** reply, int * len, void * data);
+int cli_list_config (void * v, char ** reply, int * len, void * data);
 int cli_add_path (void * v, char ** reply, int * len, void * data);
 int cli_del_path (void * v, char ** reply, int * len, void * data);
 int cli_add_map (void * v, char ** reply, int * len, void * data);
diff --git a/multipathd/main.c b/multipathd/main.c
index 292d13d..e8998bf 100644
--- a/multipathd/main.c
+++ b/multipathd/main.c
@@ -993,6 +993,7 @@ uxlsnrloop (void * ap)
 	add_handler(LIST+MAPS+STATS, cli_list_maps_stats);
 	add_handler(LIST+MAPS+TOPOLOGY, cli_list_maps_topology);
 	add_handler(LIST+MAP+TOPOLOGY, cli_list_map_topology);
+	add_handler(LIST+CONFIG, cli_list_config);
 	add_handler(ADD+PATH, cli_add_path);
 	add_handler(DEL+PATH, cli_del_path);
 	add_handler(ADD+MAP, cli_add_map);
-- 
2.7.4