---

 libmultipath/Makefile      |    6 ++

 libmultipath/config.c      |    3 +

 libmultipath/config.h      |    3 +

 libmultipath/configure.c   |    1 

 libmultipath/defaults.h    |    1 

 libmultipath/devmapper.c   |  130 +++++++++++++++++++++++++++++++++++++++------

 libmultipath/devmapper.h   |   12 ++--

 libmultipath/dict.c        |  116 +++++++++++++++++++++++++++++++++++++++-

 libmultipath/propsel.c     |   28 +++++++++

 libmultipath/propsel.h     |    1 

 libmultipath/structs.h     |    8 ++

 libmultipath/structs_vec.c |    3 -

 multipath/multipath.conf.5 |   14 ++++

 multipathd/main.c          |   23 +++++--

 14 files changed, 322 insertions(+), 27 deletions(-)

Index: multipath-tools-130222/libmultipath/config.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/config.c

+++ multipath-tools-130222/libmultipath/config.c

@@ -337,6 +337,7 @@ merge_hwe (struct hwentry * dst, struct

 	merge_num(user_friendly_names);

 	merge_num(retain_hwhandler);

 	merge_num(detect_prio);

+	merge_num(deferred_remove);

 	/*

 	 * Make sure features is consistent with

@@ -394,6 +395,7 @@ overwrite_hwe (struct hwentry * dst, str

 	overwrite_num(user_friendly_names);

 	overwrite_num(retain_hwhandler);

 	overwrite_num(detect_prio);

+	overwrite_num(deferred_remove);

 	/*

 	 * Make sure features is consistent with

@@ -617,6 +619,7 @@ load_config (char * file, struct udev *u

 	conf->fast_io_fail = DEFAULT_FAST_IO_FAIL;

 	conf->retain_hwhandler = DEFAULT_RETAIN_HWHANDLER;

 	conf->detect_prio = DEFAULT_DETECT_PRIO;

+	conf->deferred_remove = DEFAULT_DEFERRED_REMOVE;

 	conf->hw_strmatch = 0;

 	conf->force_sync = 0;

Index: multipath-tools-130222/libmultipath/config.h

===================================================================

--- multipath-tools-130222.orig/libmultipath/config.h

+++ multipath-tools-130222/libmultipath/config.h

@@ -61,6 +61,7 @@ struct hwentry {

 	int user_friendly_names;

 	int retain_hwhandler;

 	int detect_prio;

+	int deferred_remove;

 	char * bl_product;

 };

@@ -84,6 +85,7 @@ struct mpentry {

 	int flush_on_last_del;

 	int attribute_flags;

 	int user_friendly_names;

+	int deferred_remove;

 	uid_t uid;

 	gid_t gid;

 	mode_t mode;

@@ -128,6 +130,7 @@ struct config {

 	int retain_hwhandler;

 	int detect_prio;

 	int force_sync;

+	int deferred_remove;

 	unsigned int version[3];

 	char * dev;

Index: multipath-tools-130222/libmultipath/configure.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/configure.c

+++ multipath-tools-130222/libmultipath/configure.c

@@ -290,6 +290,7 @@ setup_map (struct multipath * mpp, char

 	select_dev_loss(mpp);

 	select_reservation_key(mpp);

 	select_retain_hwhandler(mpp);

+	select_deferred_remove(mpp);

 	sysfs_set_scsi_tmo(mpp);

 	/*

Index: multipath-tools-130222/libmultipath/defaults.h

===================================================================

--- multipath-tools-130222.orig/libmultipath/defaults.h

+++ multipath-tools-130222/libmultipath/defaults.h

@@ -19,6 +19,7 @@

 #define DEFAULT_FAST_IO_FAIL	5

 #define DEFAULT_RETAIN_HWHANDLER RETAIN_HWHANDLER_OFF

 #define DEFAULT_DETECT_PRIO DETECT_PRIO_OFF

+#define DEFAULT_DEFERRED_REMOVE DEFERRED_REMOVE_OFF

 #define DEFAULT_CHECKINT	5

 #define MAX_CHECKINT(a)		(a << 2)

Index: multipath-tools-130222/libmultipath/devmapper.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/devmapper.c

+++ multipath-tools-130222/libmultipath/devmapper.c

@@ -103,7 +103,9 @@ dm_lib_prereq (void)

 {

 	char version[64];

 	int v[3];

-#if defined(DM_SUBSYSTEM_UDEV_FLAG0)

+#if defined(LIBDM_API_DEFERRED)

+	int minv[3] = {1, 2, 89};

+#elif defined(DM_SUBSYSTEM_UDEV_FLAG0)

 	int minv[3] = {1, 2, 82};

 #elif defined(LIBDM_API_COOKIE)

 	int minv[3] = {1, 2, 38};

@@ -202,7 +204,7 @@ dm_prereq (void)

 }

 static int

-dm_simplecmd (int task, const char *name, int no_flush, int need_sync, uint16_t udev_flags) {

+dm_simplecmd (int task, const char *name, int no_flush, int need_sync, uint16_t udev_flags, int deferred_remove) {

 	int r = 0;

 	int udev_wait_flag = (need_sync && (task == DM_DEVICE_RESUME ||

 					    task == DM_DEVICE_REMOVE));

@@ -220,7 +222,10 @@ dm_simplecmd (int task, const char *name

 	if (no_flush)

 		dm_task_no_flush(dmt);		/* for DM_DEVICE_SUSPEND/RESUME */

 #endif

-

+#ifdef LIBDM_API_DEFERRED

+	if (deferred_remove)

+		dm_task_deferred_remove(dmt);

+#endif

 	if (udev_wait_flag && !dm_task_set_cookie(dmt, &conf->cookie, ((conf->daemon)? DM_UDEV_DISABLE_LIBRARY_FALLBACK : 0) | udev_flags))

 		goto out;

 	r = dm_task_run (dmt);

@@ -232,12 +237,18 @@ dm_simplecmd (int task, const char *name

 extern int

 dm_simplecmd_flush (int task, const char *name, int needsync, uint16_t udev_flags) {

-	return dm_simplecmd(task, name, 0, needsync, udev_flags);

+	return dm_simplecmd(task, name, 0, needsync, udev_flags, 0);

 }

 extern int

 dm_simplecmd_noflush (int task, const char *name, uint16_t udev_flags) {

-	return dm_simplecmd(task, name, 1, 1, udev_flags);

+	return dm_simplecmd(task, name, 1, 1, udev_flags, 0);

+}

+

+extern int

+dm_device_remove (const char *name, int needsync, int deferred_remove) {

+	return dm_simplecmd(DM_DEVICE_REMOVE, name, 0, needsync, 0,

+			    deferred_remove);

 }

 extern int

@@ -653,7 +664,7 @@ out:

 }

 extern int

-_dm_flush_map (const char * mapname, int need_sync)

+_dm_flush_map (const char * mapname, int need_sync, int deferred_remove)

 {

 	int r;

@@ -663,23 +674,46 @@ _dm_flush_map (const char * mapname, int

 	if (dm_type(mapname, TGT_MPATH) <= 0)

 		return 0; /* nothing to do */

-	if (dm_remove_partmaps(mapname, need_sync))

+	if (dm_remove_partmaps(mapname, need_sync, deferred_remove))

 		return 1;

-	if (dm_get_opencount(mapname)) {

+	if (!deferred_remove && dm_get_opencount(mapname)) {

 		condlog(2, "%s: map in use", mapname);

 		return 1;

 	}

-	r = dm_simplecmd_flush(DM_DEVICE_REMOVE, mapname, need_sync, 0);

+	r = dm_device_remove(mapname, need_sync, deferred_remove);

 	if (r) {

+		if (deferred_remove && dm_map_present(mapname)) {

+			condlog(4, "multipath map %s remove deferred",

+				mapname);

+			return 2;

+		}

 		condlog(4, "multipath map %s removed", mapname);

 		return 0;

 	}

 	return 1;

 }

+#ifdef LIBDM_API_DEFERRED

+

+int

+dm_flush_map_nopaths(const char * mapname, int deferred_remove)

+{

+	return _dm_flush_map(mapname, 1, deferred_remove);

+}

+

+#else

+

+int

+dm_flush_map_nopaths(const char * mapname, int deferred_remove)

+{

+	return _dm_flush_map(mapname, 1, 0);

+}

+

+#endif

+

 extern int

 dm_suspend_and_flush_map (const char * mapname)

 {

@@ -1076,6 +1110,7 @@ out:

 struct remove_data {

 	int need_sync;

+	int deferred_remove;

 };

 static int

@@ -1084,25 +1119,90 @@ remove_partmap(char *name, void *data)

 	struct remove_data *rd = (struct remove_data *)data;

 	if (dm_get_opencount(name)) {

-		dm_remove_partmaps(name, rd->need_sync);

-		if (dm_get_opencount(name)) {

+		dm_remove_partmaps(name, rd->need_sync, rd->deferred_remove);

+		if (!rd->deferred_remove && dm_get_opencount(name)) {

 			condlog(2, "%s: map in use", name);

 			return 1;

 		}

 	}

 	condlog(4, "partition map %s removed", name);

-	dm_simplecmd_flush(DM_DEVICE_REMOVE, name,

-			   rd->need_sync, 0);

+	dm_device_remove(name, rd->need_sync, rd->deferred_remove);

 	return 0;

 }

 int

-dm_remove_partmaps (const char * mapname, int need_sync)

+dm_remove_partmaps (const char * mapname, int need_sync, int deferred_remove)

 {

-	struct remove_data rd = { need_sync };

+	struct remove_data rd = { need_sync, deferred_remove };

 	return do_foreach_partmaps(mapname, remove_partmap, &rd);

 }

+#ifdef LIBDM_API_DEFERRED

+

+static int

+cancel_remove_partmap (char *name, void *unused)

+{

+	if (dm_message(name, "@cancel_deferred_remove") != 0)

+		condlog(0, "%s: can't cancel deferred remove: %s", name,

+			strerror(errno));

+	return 0;

+}

+

+static int

+dm_get_deferred_remove (char * mapname)

+{

+	int r = -1;

+	struct dm_task *dmt;

+	struct dm_info info;

+

+	if (!(dmt = dm_task_create(DM_DEVICE_INFO)))

+		return -1;

+

+	if (!dm_task_set_name(dmt, mapname))

+		goto out;

+

+	if (!dm_task_run(dmt))

+		goto out;

+

+	if (!dm_task_get_info(dmt, &info))

+		goto out;

+

+	r = info.deferred_remove;

+out:

+	dm_task_destroy(dmt);

+	return r;

+}

+

+int

+dm_cancel_deferred_remove (struct multipath *mpp)

+{

+	int r = 0;

+

+	if (!dm_get_deferred_remove(mpp->alias))

+		return 0;

+	if (mpp->deferred_remove == DEFERRED_REMOVE_IN_PROGRESS)

+		mpp->deferred_remove = DEFERRED_REMOVE_ON;

+

+	do_foreach_partmaps(mpp->alias, cancel_remove_partmap, NULL);

+	r = dm_message(mpp->alias, "@cancel_deferred_remove");

+	if (r)

+		condlog(0, "%s: can't cancel deferred remove: %s", mpp->alias,

+			strerror(errno));

+	else

+		condlog(2, "%s: canceled deferred remove", mpp->alias);

+	return r;

+}

+

+#else

+

+int

+dm_cancel_deferred_remove (struct multipath *mpp)

+{

+	return 0;

+}

+

+#endif

+

 static struct dm_info *

 alloc_dminfo (void)

 {

Index: multipath-tools-130222/libmultipath/devmapper.h

===================================================================

--- multipath-tools-130222.orig/libmultipath/devmapper.h

+++ multipath-tools-130222/libmultipath/devmapper.h

@@ -17,15 +17,18 @@ int dm_prereq (void);

 int dm_drv_version (unsigned int * version, char * str);

 int dm_simplecmd_flush (int, const char *, int, uint16_t);

 int dm_simplecmd_noflush (int, const char *, uint16_t);

+int dm_device_remove (const char *, int, int);

 int dm_addmap_create (struct multipath *mpp, char *params);

 int dm_addmap_reload (struct multipath *mpp, char *params);

 int dm_map_present (const char *);

 int dm_get_map(const char *, unsigned long long *, char *);

 int dm_get_status(char *, char *);

 int dm_type(const char *, char *);

-int _dm_flush_map (const char *, int);

-#define dm_flush_map(mapname) _dm_flush_map(mapname, 1)

-#define dm_flush_map_nosync(mapname) _dm_flush_map(mapname, 0)

+int _dm_flush_map (const char *, int, int);

+int dm_flush_map_nopaths(const char * mapname, int deferred_remove);

+#define dm_flush_map(mapname) _dm_flush_map(mapname, 1, 0)

+#define dm_flush_map_nosync(mapname) _dm_flush_map(mapname, 0, 0)

+int dm_cancel_deferred_remove(struct multipath *mpp);

 int dm_suspend_and_flush_map(const char * mapname);

 int dm_flush_maps (void);

 int dm_fail_path(char * mapname, char * path);

@@ -40,7 +43,8 @@ int dm_geteventnr (char *name);

 int dm_get_major (char *name);

 int dm_get_minor (char *name);

 char * dm_mapname(int major, int minor);

-int dm_remove_partmaps (const char * mapname, int need_sync);

+int dm_remove_partmaps (const char * mapname, int need_sync,

+			int deferred_remove);

 int dm_get_uuid(char *name, char *uuid);

 int dm_get_info (char * mapname, struct dm_info ** dmi);

 int dm_rename (char * old, char * new);

Index: multipath-tools-130222/libmultipath/dict.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/dict.c

+++ multipath-tools-130222/libmultipath/dict.c

@@ -738,6 +738,29 @@ def_force_sync_handler(vector strvec)

 	return 0;

 }

+static int

+def_deferred_remove_handler(vector strvec)

+{

+	char * buff;

+

+	buff = set_value(strvec);

+

+	if (!buff)

+		return 1;

+

+	if ((strlen(buff) == 2 && !strcmp(buff, "no")) ||

+	    (strlen(buff) == 1 && !strcmp(buff, "0")))

+		conf->deferred_remove = DEFERRED_REMOVE_OFF;

+	else if ((strlen(buff) == 3 && !strcmp(buff, "yes")) ||

+		 (strlen(buff) == 1 && !strcmp(buff, "1")))

+		conf->deferred_remove = DEFERRED_REMOVE_ON;

+	else

+		conf->deferred_remove = DEFAULT_DEFERRED_REMOVE;

+

+	FREE(buff);

+	return 0;

+}

+

 /*

  * blacklist block handlers

  */

@@ -1445,6 +1468,33 @@ hw_detect_prio_handler(vector strvec)

 	return 0;

 }

+static int

+hw_deferred_remove_handler(vector strvec)

+{

+	struct hwentry *hwe = VECTOR_LAST_SLOT(conf->hwtable);

+	char * buff;

+

+	if (!hwe)

+		return 1;

+

+	buff = set_value(strvec);

+

+	if (!buff)

+		return 1;

+

+	if ((strlen(buff) == 2 && !strcmp(buff, "no")) ||

+	    (strlen(buff) == 1 && !strcmp(buff, "0")))

+		hwe->deferred_remove = DEFERRED_REMOVE_OFF;

+	else if ((strlen(buff) == 3 && !strcmp(buff, "yes")) ||

+		 (strlen(buff) == 1 && !strcmp(buff, "1")))

+		hwe->deferred_remove = DEFERRED_REMOVE_ON;

+	else

+		hwe->deferred_remove = DEFERRED_REMOVE_UNDEF;

+

+	FREE(buff);

+	return 0;

+}

+

 /*

  * multipaths block handlers

  */

@@ -1920,6 +1970,32 @@ mp_names_handler(vector strvec)

 	return 0;

 }

+static int

+mp_deferred_remove_handler(vector strvec)

+{

+	struct mpentry *mpe = VECTOR_LAST_SLOT(conf->mptable);

+	char * buff;

+

+	if (!mpe)

+		return 1;

+

+	buff = set_value(strvec);

+	if (!buff)

+		return 1;

+

+	if ((strlen(buff) == 2 && strcmp(buff, "no") == 0) ||

+	    (strlen(buff) == 1 && strcmp(buff, "0") == 0))

+		mpe->deferred_remove = DEFERRED_REMOVE_OFF;

+	else if ((strlen(buff) == 3 && strcmp(buff, "yes") == 0) ||

+		 (strlen(buff) == 1 && strcmp(buff, "1") == 0))

+		mpe->deferred_remove = DEFERRED_REMOVE_ON;

+	else

+		mpe->deferred_remove = DEFERRED_REMOVE_UNDEF;

+

+	FREE(buff);

+	return 0;

+}

+

 /*

  * config file keywords printing

  */

@@ -2165,7 +2241,7 @@ snprint_mp_reservation_key (char * buff,

 	return snprintf(buff, len, "0x%" PRIx64, prkey);

 }

-	static int

+static int

 snprint_mp_user_friendly_names (char * buff, int len, void * data)

 {

 	struct mpentry * mpe = (struct mpentry *)data;

@@ -2179,6 +2255,19 @@ snprint_mp_user_friendly_names (char * b

 }

 static int

+snprint_mp_deferred_remove (char * buff, int len, void * data)

+{

+	struct mpentry * mpe = (struct mpentry *)data;

+

+	if (mpe->deferred_remove == DEFERRED_REMOVE_UNDEF)

+		return 0;

+	else if (mpe->deferred_remove == DEFERRED_REMOVE_OFF)

+		return snprintf(buff, len, "no");

+	else

+		return snprintf(buff, len, "yes");

+}

+

+static int

 snprint_hw_fast_io_fail(char * buff, int len, void * data)

 {

 	struct hwentry * hwe = (struct hwentry *)data;

@@ -2507,6 +2596,19 @@ snprint_hw_retain_hwhandler_handler(char

 }

 static int

+snprint_hw_deferred_remove(char * buff, int len, void * data)

+{

+	struct hwentry * hwe = (struct hwentry *)data;

+

+	if (hwe->deferred_remove == DEFERRED_REMOVE_ON)

+		return snprintf(buff, len, "yes");

+	else if (hwe->deferred_remove == DEFERRED_REMOVE_OFF)

+		return snprintf(buff, len, "no");

+	else

+		return 0;

+}

+

+static int

 snprint_detect_prio(char * buff, int len, void * data)

 {

 	struct hwentry * hwe = (struct hwentry *)data;

@@ -2900,6 +3002,15 @@ snprint_def_force_sync(char * buff, int

 }

 static int

+snprint_def_deferred_remove(char * buff, int len, void * data)

+{

+	if (conf->deferred_remove == DEFERRED_REMOVE_ON)

+		return snprintf(buff, len, "yes");

+	else

+		return snprintf(buff, len, "no");

+}

+

+static int

 snprint_ble_simple (char * buff, int len, void * data)

 {

 	struct blentry * ble = (struct blentry *)data;

@@ -2968,6 +3079,7 @@ init_keywords(void)

 	install_keyword("detect_prio", &def_detect_prio_handler, &snprint_def_detect_prio);

 	install_keyword("hw_str_match", &def_hw_strmatch_handler, &snprint_def_hw_strmatch);

 	install_keyword("force_sync", &def_force_sync_handler, &snprint_def_force_sync);

+	install_keyword("deferred_remove", &def_deferred_remove_handler, &snprint_def_deferred_remove);

 	__deprecated install_keyword("default_selector", &def_selector_handler, NULL);

 	__deprecated install_keyword("default_path_grouping_policy", &def_pgpolicy_handler, NULL);

 	__deprecated install_keyword("default_uid_attribute", &def_uid_attribute_handler, NULL);

@@ -3032,6 +3144,7 @@ init_keywords(void)

 	install_keyword("user_friendly_names", &hw_names_handler, &snprint_hw_user_friendly_names);

 	install_keyword("retain_attached_hw_handler", &hw_retain_hwhandler_handler, &snprint_hw_retain_hwhandler_handler);

 	install_keyword("detect_prio", &hw_detect_prio_handler, &snprint_detect_prio);

+	install_keyword("deferred_remove", &hw_deferred_remove_handler, &snprint_hw_deferred_remove);

 	install_sublevel_end();

 	install_keyword_root("multipaths", &multipaths_handler);

@@ -3056,5 +3169,6 @@ init_keywords(void)

 	install_keyword("gid", &mp_gid_handler, &snprint_mp_gid);

 	install_keyword("reservation_key", &mp_reservation_key_handler, &snprint_mp_reservation_key);

 	install_keyword("user_friendly_names", &mp_names_handler, &snprint_mp_user_friendly_names);

+	install_keyword("deferred_remove", &mp_deferred_remove_handler, &snprint_mp_deferred_remove);

 	install_sublevel_end();

 }

Index: multipath-tools-130222/libmultipath/propsel.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/propsel.c

+++ multipath-tools-130222/libmultipath/propsel.c

@@ -744,6 +744,34 @@ select_retain_hwhandler (struct multipat

 }

 extern int

+select_deferred_remove (struct multipath *mp)

+{

+	if (mp->deferred_remove == DEFERRED_REMOVE_IN_PROGRESS) {

+		condlog(3, "%s: deferred_remove in progress", mp->alias);

+		return 0;

+	}

+	if (mp->mpe && mp->mpe->deferred_remove) {

+		mp->deferred_remove = mp->mpe->deferred_remove;

+		condlog(3, "%s: deferred_remove = %i (multipath setting)",

+			mp->alias, mp->deferred_remove);

+		return 0;

+	}

+	if (mp->hwe && mp->hwe->deferred_remove) {

+		mp->deferred_remove = mp->hwe->deferred_remove;

+		condlog(3, "%s: deferred_remove = %d (controller default)", mp->alias, mp->deferred_remove);

+		return 0;

+	}

+	if (conf->deferred_remove) {

+		mp->deferred_remove = conf->deferred_remove;

+		condlog(3, "%s: deferred_remove = %d (config file default)", mp->alias, mp->deferred_remove);

+		return 0;

+	}

+	mp->deferred_remove = DEFAULT_DEFERRED_REMOVE;

+	condlog(3, "%s: deferred_remove = %d (compiled in default)", mp->alias, mp->deferred_remove);

+	return 0;

+}

+

+extern int

 select_detect_prio (struct path * pp)

 {

 	if (pp->hwe && pp->hwe->detect_prio) {

Index: multipath-tools-130222/libmultipath/propsel.h

===================================================================

--- multipath-tools-130222.orig/libmultipath/propsel.h

+++ multipath-tools-130222/libmultipath/propsel.h

@@ -20,3 +20,4 @@ int select_dev_loss(struct multipath *mp

 int select_reservation_key(struct multipath *mp);

 int select_retain_hwhandler (struct multipath * mp);

 int select_detect_prio(struct path * pp);

+int select_deferred_remove(struct multipath *mp);

Index: multipath-tools-130222/libmultipath/structs.h

===================================================================

--- multipath-tools-130222.orig/libmultipath/structs.h

+++ multipath-tools-130222/libmultipath/structs.h

@@ -114,6 +114,13 @@ enum detect_prio_states {

 	DETECT_PRIO_ON,

 };

+enum deferred_remove_states {

+	DEFERRED_REMOVE_UNDEF,

+	DEFERRED_REMOVE_OFF,

+	DEFERRED_REMOVE_ON,

+	DEFERRED_REMOVE_IN_PROGRESS,

+};

+

 enum scsi_protocol {

 	SCSI_PROTOCOL_FCP = 0,	/* Fibre Channel */

 	SCSI_PROTOCOL_SPI = 1,	/* parallel SCSI */

@@ -207,6 +214,7 @@ struct multipath {

 	int attribute_flags;

 	int fast_io_fail;

 	int retain_hwhandler;

+	int deferred_remove;

 	unsigned int dev_loss;

 	uid_t uid;

 	gid_t gid;

Index: multipath-tools-130222/multipathd/main.c

===================================================================

--- multipath-tools-130222.orig/multipathd/main.c

+++ multipath-tools-130222/multipathd/main.c

@@ -214,19 +214,30 @@ sync_maps_state(vector mpvec)

 }

 static int

-flush_map(struct multipath * mpp, struct vectors * vecs)

+flush_map(struct multipath * mpp, struct vectors * vecs, int nopaths)

 {

+	int r;

+

+	if (nopaths)

+		r = dm_flush_map_nopaths(mpp->alias, mpp->deferred_remove);

+	else

+		r = dm_flush_map(mpp->alias);

 	/*

 	 * clear references to this map before flushing so we can ignore

 	 * the spurious uevent we may generate with the dm_flush_map call below

 	 */

-	if (dm_flush_map(mpp->alias)) {

+	if (r) {

 		/*

 		 * May not really be an error -- if the map was already flushed

 		 * from the device mapper by dmsetup(8) for instance.

 		 */

-		condlog(0, "%s: can't flush", mpp->alias);

-		return 1;

+		if (r == 1)

+			condlog(0, "%s: can't flush", mpp->alias);

+		else {

+			condlog(2, "%s: devmap deferred remove", mpp->alias);

+			mpp->deferred_remove = DEFERRED_REMOVE_IN_PROGRESS;

+		}

+		return r;

 	}

 	else {

 		dm_lib_release();

@@ -372,7 +383,7 @@ ev_remove_map (char * devname, char * al

 			mpp->alias, mpp->dmi->minor, minor);

 		return 0;

 	}

-	return flush_map(mpp, vecs);

+	return flush_map(mpp, vecs, 0);

 }

 static int

@@ -628,7 +639,7 @@ ev_remove_path (struct path *pp, struct

 				mpp->flush_on_last_del = FLUSH_IN_PROGRESS;

 				dm_queue_if_no_path(mpp->alias, 0);

 			}

-			if (!flush_map(mpp, vecs)) {

+			if (!flush_map(mpp, vecs, 1)) {

 				condlog(2, "%s: removed map after"

 					" removing all paths",

 					alias);

Index: multipath-tools-130222/libmultipath/structs_vec.c

===================================================================

--- multipath-tools-130222.orig/libmultipath/structs_vec.c

+++ multipath-tools-130222/libmultipath/structs_vec.c

@@ -392,6 +392,8 @@ __setup_multipath (struct vectors * vecs

 		set_no_path_retry(mpp);

 		select_pg_timeout(mpp);

 		select_flush_on_last_del(mpp);

+		if (VECTOR_SIZE(mpp->paths) != 0)

+			dm_cancel_deferred_remove(mpp);

 	}

 	return 0;

@@ -565,7 +567,6 @@ int update_multipath (struct vectors *ve

 			}

 		}

 	}

-

 	return 0;

 }

Index: multipath-tools-130222/multipath/multipath.conf.5

===================================================================

--- multipath-tools-130222.orig/multipath/multipath.conf.5

+++ multipath-tools-130222/multipath/multipath.conf.5

@@ -420,6 +420,16 @@ only one checker will run at a time.  Th

 multipathd checkers running in parallel causes significant CPU pressure. The

 Default is

 .I no

+.TP

+.B deferred_remove

+If set to

+.I yes

+, multipathd will do a deferred remove instead of a regular remove when the

+last path device has been deleted.  This means that if the multipath device is

+still in use, it will be freed when the last user closes it.  If path is added

+to the multipath device before the last user closes it, the deferred remove

+will be canceled. Default is

+.I no

 .

 .SH "blacklist section"

 The

@@ -521,6 +531,8 @@ section:

 .B features

 .TP