commit ab9e14002e271eba41f7f9ab7e9b03cac4adc22d
author Gabriel de Perthuis <g2p.code@gmail.com> Sun Jun 09 00:54:48 2013 +0200
committer Kent Overstreet <koverstreet@google.com> Wed Jun 26 21:58:06 2013 -0700
tree 9ea2f05da65129fb96d4a4aead85986058b9f3e9
parent a25c32bedeff3573b53572b87bcafe10ec5b75a9

bcache: Send label uevents

Signed-off-by: Gabriel de Perthuis <g2p.code@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>

drivers/md/bcache/super.c

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index a104dad..cff2d18 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -825,12 +825,18 @@
 void bch_cached_dev_run(struct cached_dev *dc)
 {
 	struct bcache_device *d = &dc->disk;
+	char buf[SB_LABEL_SIZE + 1];
 	char *env[] = {
 		"DRIVER=bcache",
 		kasprintf(GFP_KERNEL, "CACHED_UUID=%pU", dc->sb.uuid),
-		NULL
+		NULL,
+		NULL,
 	};
 
+	memcpy(buf, dc->sb.label, SB_LABEL_SIZE);
+	buf[SB_LABEL_SIZE] = '\0';
+	env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
+
 	if (atomic_xchg(&dc->running, 1))
 		return;
 
@@ -850,6 +856,7 @@
 	 * only class / kset properties are persistent */
 	kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env);
 	kfree(env[1]);
+	kfree(env[2]);
 
 	if (sysfs_create_link(&d->kobj, &disk_to_dev(d->disk)->kobj, "dev") ||
 	    sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache"))