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-rw-r--r--module/zfs/vdev.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/module/zfs/vdev.c b/module/zfs/vdev.c
index 4613e951a..1c14c7750 100644
--- a/module/zfs/vdev.c
+++ b/module/zfs/vdev.c
@@ -1069,6 +1069,15 @@ vdev_open_child(void *arg)
boolean_t
vdev_uses_zvols(vdev_t *vd)
{
+/*
+ * Stacking zpools on top of zvols is unsupported until we implement a method
+ * for determining if an arbitrary block device is a zvol without using the
+ * path. Solaris would check the 'zvol' path component but this does not
+ * exist in the Linux port, so we really should do something like stat the
+ * file and check the major number. This is complicated by the fact that
+ * we need to do this portably in user or kernel space.
+ */
+#if 0
int c;
if (vd->vdev_path && strncmp(vd->vdev_path, ZVOL_DIR,
@@ -1077,6 +1086,7 @@ vdev_uses_zvols(vdev_t *vd)
for (c = 0; c < vd->vdev_children; c++)
if (vdev_uses_zvols(vd->vdev_child[c]))
return (B_TRUE);
+#endif
return (B_FALSE);
}