Fix pvcreate on a partition (regressed in 2.02.51).

Eliminate busy loop during pvcreate of a "normal" partition.
_md_sysfs_attribute_snprintf() would busy loop if the device it was
given was not a blkext-based MD partition.

Rather than being cute with a busy-loop prone 'goto check_md_major' in
_md_sysfs_attribute_snprintf(): explicitly check if the provided device
is a blkext-based partition (blkext_major()); and then check that the
get_primary_dev() determined parent is an MD device (md_major()).

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/filters/filter.c b/lib/filters/filter.c
index c218d548..d8ce366d 100644
--- a/lib/filters/filter.c
+++ b/lib/filters/filter.c
@@ -38,6 +38,7 @@ typedef struct {
 } device_info_t;
 
 static int _md_major = -1;
+static int _blkext_major = -1;
 static int _device_mapper_major = -1;
 
 int md_major(void)
@@ -45,6 +46,11 @@ int md_major(void)
 	return _md_major;
 }
 
+int blkext_major(void)
+{
+	return _blkext_major;
+}
+
 /*
  * Devices are only checked for partition tables if their minor number
  * is a multiple of the number corresponding to their type below
@@ -197,6 +203,10 @@ static int _scan_proc_dev(const char *proc, const struct config_node *cn)
 		if (!strncmp("md", line + i, 2) && isspace(*(line + i + 2)))
 			_md_major = line_maj;
 
+		/* Look for blkext device */
+		if (!strncmp("blkext", line + i, 6) && isspace(*(line + i + 6)))
+			_blkext_major = line_maj;
+
 		/* Look for device-mapper device */
 		/* FIXME Cope with multiple majors */
 		if (!strncmp("device-mapper", line + i, 13) && isspace(*(line + i + 13)))