device-mapper-multipath/0034-RHBZ-579575-add-q-multipath-option.patch

---
 libmultipath/config.h    |    1 +
 libmultipath/configure.c |    6 +++++-
 libmultipath/file.c      |   32 ++++++++++++++++++++++++++++++++
 libmultipath/file.h      |    1 +
 multipath/main.c         |    8 ++++++--
 5 files changed, 45 insertions(+), 3 deletions(-)

Index: multipath-tools/libmultipath/config.h
===================================================================
--- multipath-tools.orig/libmultipath/config.h
+++ multipath-tools/libmultipath/config.h
@@ -87,6 +87,7 @@ struct config {
 	int fast_io_fail;
 	unsigned int dev_loss;
 	int find_multipaths;
+	int allow_queueing;
 	uid_t uid;
 	gid_t gid;
 	mode_t mode;
Index: multipath-tools/libmultipath/configure.c
===================================================================
--- multipath-tools.orig/libmultipath/configure.c
+++ multipath-tools/libmultipath/configure.c
@@ -36,6 +36,7 @@
 #include "prio.h"
 #include "util.h"
 #include "finder.h"
+#include "file.h"
 
 extern int
 setup_map (struct multipath * mpp)
@@ -567,7 +568,10 @@ coalesce_paths (struct vectors * vecs, v
 		if (r == DOMAP_DRY)
 			continue;
 
-		if (mpp->no_path_retry != NO_PATH_RETRY_UNDEF) {
+		if (!conf->daemon && !conf->allow_queueing &&
+		    !pidfile_check(DEFAULT_PIDFILE))
+			dm_queue_if_no_path(mpp->alias, 0);
+		else if (mpp->no_path_retry != NO_PATH_RETRY_UNDEF) {
 			if (mpp->no_path_retry == NO_PATH_RETRY_FAIL)
 				dm_queue_if_no_path(mpp->alias, 0);
 			else
Index: multipath-tools/multipath/main.c
===================================================================
--- multipath-tools.orig/multipath/main.c
+++ multipath-tools/multipath/main.c
@@ -80,7 +80,7 @@ usage (char * progname)
 {
 	fprintf (stderr, VERSION_STRING);
 	fprintf (stderr, "Usage:\n");
-	fprintf (stderr, "  %s [-c] [-d] [-r] [-v lvl] [-p pol] [-b fil] [dev]\n", progname);
+	fprintf (stderr, "  %s [-c] [-d] [-r] [-v lvl] [-p pol] [-b fil] [-q] [dev]\n", progname);
 	fprintf (stderr, "  %s -l|-ll|-f [-v lvl] [-b fil] [dev]\n", progname);
 	fprintf (stderr, "  %s -F [-v lvl]\n", progname);
 	fprintf (stderr, "  %s -h\n", progname);
@@ -93,6 +93,7 @@ usage (char * progname)
 		"  -f      flush a multipath device map\n" \
 		"  -F      flush all multipath device maps\n" \
 		"  -c      check if a device should be a path in a multipath device\n" \
+		"  -q      allow queue_if_no_path when multipathd is not running\n"\
 		"  -d      dry run, do not create or update devmaps\n" \
 		"  -r      force devmap reload\n" \
 		"  -p      policy failover|multibus|group_by_serial|group_by_prio\n" \
@@ -362,7 +363,7 @@ main (int argc, char *argv[])
 		condlog(0, "multipath tools need sysfs mounted");
 		exit(1);
 	}
-	while ((arg = getopt(argc, argv, ":dchl::FfM:v:p:b:r")) != EOF ) {
+	while ((arg = getopt(argc, argv, ":dchl::FfM:v:p:b:rq")) != EOF ) {
 		switch(arg) {
 		case 1: printf("optarg : %s\n",optarg);
 			break;
@@ -379,6 +380,9 @@ main (int argc, char *argv[])
 		case 'c':
 			conf->dry_run = 2;
 			break;
+		case 'q':
+			conf->allow_queueing = 1;
+			break;
 		case 'd':
 			if (!conf->dry_run)
 				conf->dry_run = 1;
Index: multipath-tools/libmultipath/file.c
===================================================================
--- multipath-tools.orig/libmultipath/file.c
+++ multipath-tools/libmultipath/file.c
@@ -176,3 +176,35 @@ fail:
 	close(fd);
 	return -1;
 }
+
+int pidfile_check(const char *file)
+{
+	int fd;
+	struct flock lock;
+
+	fd = open(file, O_RDONLY);
+	if (fd < 0) {
+		if (errno == ENOENT)
+			return 0;
+		condlog(0, "Cannot open pidfile, %s : %s", file,
+			strerror(errno));
+		return -1;
+	}
+	lock.l_type = F_WRLCK;
+	lock.l_start = 0;
+	lock.l_whence = SEEK_SET;
+	lock.l_len = 0;
+
+	if (fcntl(fd, F_GETLK, &lock) < 0) {
+		condlog(0, "Cannot check lock on pidfile, %s : %s", file,
+			strerror(errno));
+		return -1;
+	}
+	close(fd);
+	if (lock.l_type == F_UNLCK)
+		return 0;
+	return 1;
+}
+
+
+
Index: multipath-tools/libmultipath/file.h
===================================================================
--- multipath-tools.orig/libmultipath/file.h
+++ multipath-tools/libmultipath/file.h
@@ -7,5 +7,6 @@
 
 #define FILE_TIMEOUT 30
 int open_file(char *file, int *can_write, char *header);
+int pidfile_check(const char *file);
 
 #endif /* _FILE_H */