multipath-tools: add compile time configuration for "/etc/multipath"

Instead of hard-conding "/etc/multipath" as the path for the state
files "bindings", "prkeys", and "wwids", make this path configurable
via the "statedir" compile-time option. The default is currently still
/etc, it might change to /var/lib or similar in the future.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Benjamin Marzinski <bmarzins@redhat.com>

Makefile.inc

@@ -58,6 +58,7 @@ pkgconfdir	:= $(usrlibdir)/pkgconfig
 plugindir       := $(prefix)/$(LIB)/multipath
 configdir       := $(etc_prefix)/etc/multipath/conf.d
 configfile      := $(etc_prefix)/etc/multipath.conf
+statedir        := $(etc_prefix)/etc/multipath
 runtimedir      := $(if $(shell test -L /var/run -o ! -d /var/run && echo 1),/run,/var/run)
 devmapper_incdir := $(or $(shell $(PKG_CONFIG) --variable=includedir devmapper),/usr/include)
 libudev_incdir	:= $(or $(shell $(PKG_CONFIG) --variable=includedir libudev),/usr/include)
@@ -88,7 +89,8 @@ WARNFLAGS	:= -Werror -Wall -Wextra -Wformat=2 $(WFORMATOVERFLOW) -Werror=implici
 CPPFLAGS	:= $(FORTIFY_OPT) $(CPPFLAGS) \
 		   -DBIN_DIR=\"$(bindir)\" -DMULTIPATH_DIR=\"$(plugindir)\" \
 		   -DRUNTIME_DIR=\"$(runtimedir)\" -DCONFIG_DIR=\"$(configdir)\" \
-		   -DDEFAULT_CONFIGFILE=\"$(configfile)\" -DEXTRAVERSION=\"$(EXTRAVERSION)\" -MMD -MP
+		   -DDEFAULT_CONFIGFILE=\"$(configfile)\" -DSTATE_DIR=\"$(statedir)\" \
+		   -DEXTRAVERSION=\"$(EXTRAVERSION)\" -MMD -MP
 CFLAGS		:= --std=gnu99 $(CFLAGS) $(OPTFLAGS) $(WARNFLAGS) -pipe
 BIN_CFLAGS	:= -fPIE -DPIE
 LIB_CFLAGS	:= -fPIC

libmultipath/defaults.h

@@ -66,9 +66,9 @@
 #define MAX_DEV_LOSS_TMO	UINT_MAX
 #define DEFAULT_PIDFILE		RUNTIME_DIR "/multipathd.pid"
 #define DEFAULT_SOCKET		"/org/kernel/linux/storage/multipathd"
-#define DEFAULT_BINDINGS_FILE	"/etc/multipath/bindings"
-#define DEFAULT_WWIDS_FILE	"/etc/multipath/wwids"
-#define DEFAULT_PRKEYS_FILE    "/etc/multipath/prkeys"
+#define DEFAULT_BINDINGS_FILE	STATE_DIR "/bindings"
+#define DEFAULT_WWIDS_FILE	STATE_DIR "/wwids"
+#define DEFAULT_PRKEYS_FILE	STATE_DIR "/prkeys"
 #define MULTIPATH_SHM_BASE	RUNTIME_DIR "/multipath/"