X-Git-Url: http://git.openwrt.org/?a=blobdiff_plain;f=block.c;fp=block.c;h=4416c91a2517bcdf756a854229ea2ccb6eb253c6;hb=2f42515977adef7c026eb380ed2423c533cf8f3d;hp=5b0517eb95c8a22b928aedd06eb85b4fa8191c0e;hpb=4d4dcfb33c5d9fa31c9916e106bee309ec7b4b01;p=project%2Ffstools.git

diff --git a/block.c b/block.c
index 5b0517e..4416c91 100644
--- a/block.c
+++ b/block.c
@@ -1171,7 +1171,28 @@ static int mount_action(char *action, char *device, int type)
 
 static int main_hotplug(int argc, char **argv)
 {
-	return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG);
+	char *devname = getenv("DEVNAME");
+
+	/* resolve device mapper name for dm-* if possible */
+	if (devname && strlen(devname) >= 2 && !strncmp(devname, "dm-", 3)) {
+		char *dmdevnamep;
+		char dmname[256];
+
+		if (asprintf(&dmdevnamep, "/sys/%s/dm/name", getenv("DEVPATH")) == -1)
+			exit(ENOMEM);
+
+		FILE *fp = fopen(dmdevnamep, "r");
+		free(dmdevnamep);
+
+		if (fp) {
+			if (fgets(dmname, sizeof(dmname), fp))
+				devname = dmname;
+
+			fclose(fp);
+		}
+	}
+
+	return mount_action(getenv("ACTION"), devname, TYPE_HOTPLUG);
 }
 
 static int main_autofs(int argc, char **argv)