From dda12da9f1ec714af0e468aa03c24f402961f135 Mon Sep 17 00:00:00 2001
From: George Wilson <george.wilson@delphix.com>
Date: Thu, 12 Dec 2013 10:19:54 -0800
Subject: [PATCH] Illumos #4121 vdev_label_init read only

4121 vdev_label_init should treat request as succeeded when pool
     is read only
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Saso Kiselkov <skiselkov.ml@gmail.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/4121
  illumos/illumos-gate@973c78e94bf9634782164382c9e291bf81161fa5

Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1863
---
 module/zfs/vdev_label.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/zfs/vdev_label.c b/module/zfs/vdev_label.c
index 146dc28e8..568ae06b3 100644
--- a/module/zfs/vdev_label.c
+++ b/module/zfs/vdev_label.c
@@ -644,7 +644,7 @@ vdev_label_init(vdev_t *vd, uint64_t crtxg, vdev_labeltype_t reason)
 	/* Track the creation time for this vdev */
 	vd->vdev_crtxg = crtxg;
 
-	if (!vd->vdev_ops->vdev_op_leaf)
+	if (!vd->vdev_ops->vdev_op_leaf || !spa_writeable(spa))
 		return (0);
 
 	/*
-- 
2.39.2