[dm-devel] [PATCH] dm-multipath: blacklist NVMe devices

[Vaughan Cao]

Multipath works at the request level and NVMe bypasses the request layer. So
multipath is not going to be supported for NVMe devices. Add NVMe to default
blacklist.

Signed-off-by: Vaughan Cao <vaughan.cao at oracle.com>
---
 libmultipath/blacklist.c | 6 ++++++
 multipath.conf.defaults  | 1 +
 2 files changed, 7 insertions(+)

diff --git a/libmultipath/blacklist.c b/libmultipath/blacklist.c
index 79ddcde..651bd7e 100644
--- a/libmultipath/blacklist.c
+++ b/libmultipath/blacklist.c
@@ -176,6 +176,12 @@ setup_default_blist (struct config * conf)
 	if (store_ble(conf->blist_devnode, str, ORIGIN_DEFAULT))
 		return 1;
 
+	str = STRDUP("^nvme.*");
+	if (!str)
+		return 1;
+	if (store_ble(conf->blist_devnode, str, ORIGIN_DEFAULT))
+		return 1;
+
 	str = STRDUP("(ID_SCSI_VPD|ID_WWN)");
 	if (!str)
 		return 1;
diff --git a/multipath.conf.defaults b/multipath.conf.defaults
index e761902..12fb3f0 100644
--- a/multipath.conf.defaults
+++ b/multipath.conf.defaults
@@ -31,6 +31,7 @@
 #	devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
 #	devnode "^hd[a-z]"
 #	devnode "^dcssblk[0-9]*"
+#	devnode "^nvme.*"
 #	device {
 #		vendor "DGC"
 #		product "LUNZ"
-- 
1.8.3.1