device-mapper-multipath/0084-libmpathvalid-use-default-_multipath_config-udev-and.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Sat, 26 Sep 2020 23:25:46 -0500
Subject: [PATCH] libmpathvalid: use default *_multipath_config, udev, and
 logsink

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
 libmpathvalid/libmpathvalid.version |  2 +-
 libmpathvalid/mpath_valid.c         | 73 ++++++++++++++++++++---------
 libmpathvalid/mpath_valid.h         | 12 +++--
 3 files changed, 61 insertions(+), 26 deletions(-)

diff --git a/libmpathvalid/libmpathvalid.version b/libmpathvalid/libmpathvalid.version
index 4d8a8ba4..3bd0d3c5 100644
--- a/libmpathvalid/libmpathvalid.version
+++ b/libmpathvalid/libmpathvalid.version
@@ -1,7 +1,7 @@
 MPATH_1.0 {
 	global:
-		mpathvalid_conf;
 		mpathvalid_init;
+		mpathvalid_reload_config;
 		mpathvalid_exit;
 		mpathvalid_is_path;
 		mpathvalid_get_mode;
diff --git a/libmpathvalid/mpath_valid.c b/libmpathvalid/mpath_valid.c
index 6153e8b7..d839dbac 100644
--- a/libmpathvalid/mpath_valid.c
+++ b/libmpathvalid/mpath_valid.c
@@ -15,9 +15,7 @@
 #include "mpath_cmd.h"
 #include "valid.h"
 #include "mpath_valid.h"
-
-static struct config default_config = { .verbosity = -1 };
-struct config *mpathvalid_conf = &default_config;
+#include "debug.h"
 
 static unsigned int get_conf_mode(struct config *conf)
 {
@@ -68,38 +66,70 @@ static int convert_result(int result) {
 }
 
 int
-mpathvalid_init(int verbosity)
+mpathvalid_init(int verbosity, int log_style)
 {
 	unsigned int version[3];
 	struct config *conf;
 
-	default_config.verbosity = verbosity;
-	skip_libmp_dm_init();
-	conf = load_config(DEFAULT_CONFIGFILE);
-	if (!conf)
+	logsink = log_style;
+	if (libmultipath_init())
 		return -1;
+	conf = get_multipath_config();
 	conf->verbosity = verbosity;
-	if (dm_prereq(version))
+	put_multipath_config(conf);
+
+	skip_libmp_dm_init();
+	if (init_config(DEFAULT_CONFIGFILE))
 		goto fail;
-	memcpy(conf->version, version, sizeof(version));
+	if (dm_prereq(version))
+		goto fail_config;
 
-	mpathvalid_conf = conf;
+	conf = get_multipath_config();
+	conf->verbosity = verbosity;
+	memcpy(conf->version, version, sizeof(version));
+	put_multipath_config(conf);
 	return 0;
+
+fail_config:
+	uninit_config();
 fail:
-	free_config(conf);
+	libmultipath_exit();
 	return -1;
 }
 
 int
-mpathvalid_exit(void)
+mpathvalid_reload_config(void)
 {
-	struct config *conf = mpathvalid_conf;
+	int verbosity;
+	unsigned int version[3];
+	struct config *conf;
+
+	conf = get_multipath_config();
+	memcpy(version, conf->version, sizeof(version));
+	verbosity = conf->verbosity;
+	put_multipath_config(conf);
 
-	default_config.verbosity = -1;
-	if (mpathvalid_conf == &default_config)
-		return 0;
-	mpathvalid_conf = &default_config;
-	free_config(conf);
+	uninit_config();
+
+	conf = get_multipath_config();
+	conf->verbosity = verbosity;
+	put_multipath_config(conf);
+
+	if (init_config(DEFAULT_CONFIGFILE))
+		return -1;
+
+	conf = get_multipath_config();
+	conf->verbosity = verbosity;
+	memcpy(conf->version, version, sizeof(version));
+	put_multipath_config(conf);
+	return 0;
+}
+
+int
+mpathvalid_exit(void)
+{
+	uninit_config();
+	libmultipath_exit();
 	return 0;
 }
 
@@ -121,9 +151,10 @@ mpathvalid_is_path(const char *name, unsigned int mode, char **wwid,
 
 	if (!name || mode >= MPATH_MAX_MODE)
 		return r;
-
 	if (nr_paths > 0 && !path_wwids)
 		return r;
+	if (!udev)
+		return r;
 
 	pp = alloc_path();
 	if (!pp)
@@ -136,7 +167,7 @@ mpathvalid_is_path(const char *name, unsigned int mode, char **wwid,
 	}
 
 	conf = get_multipath_config();
-	if (!conf || conf == &default_config)
+	if (!conf)
 		goto out_wwid;
 	if (mode != MPATH_DEFAULT)
 		set_conf_mode(conf, mode);
diff --git a/libmpathvalid/mpath_valid.h b/libmpathvalid/mpath_valid.h
index 7fd8aa47..c83b8da5 100644
--- a/libmpathvalid/mpath_valid.h
+++ b/libmpathvalid/mpath_valid.h
@@ -42,15 +42,19 @@ enum mpath_valid_result {
 	MPATH_IS_MAYBE_VALID,
 };
 
-struct config;
-extern struct config *mpathvalid_conf;
-int mpathvalid_init(int verbosity);
+enum mpath_valid_log_style {
+	MPATH_LOG_STDIO = -1,
+	MPATH_LOG_STDIO_TIMESTAMP,
+	MPATH_LOG_SYSLOG,
+};
+
+int mpathvalid_init(int verbosity, int log_style);
+int mpathvalid_reload_config(void);
 int mpathvalid_exit(void);
 unsigned int mpathvalid_get_mode(void);
 int mpathvalid_is_path(const char *name, unsigned int mode, char **wwid,
 		       const char **path_wwids, unsigned int nr_paths);
 
-
 #ifdef __cplusplus
 }
 #endif
-- 
2.17.2