From a17184a911195c274104df98a79bec10f57e735d Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Wed, 6 Feb 2008 01:39:55 -0800
Subject: [PATCH] md: allow an md array to appear with 0 drives if it has
external metadata
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/md/md.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 39757566f39..08e0f8d672c 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4647,9 +4647,10 @@ static int md_ioctl(struct inode *inode, struct file *file,
*/
/* if we are not initialised yet, only ADD_NEW_DISK, STOP_ARRAY,
* RUN_ARRAY, and GET_ and SET_BITMAP_FILE are allowed */
- if (!mddev->raid_disks && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY
- && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE
- && cmd != GET_BITMAP_FILE) {
+ if ((!mddev->raid_disks && !mddev->external)
+ && cmd != ADD_NEW_DISK && cmd != STOP_ARRAY
+ && cmd != RUN_ARRAY && cmd != SET_BITMAP_FILE
+ && cmd != GET_BITMAP_FILE) {
err = -ENODEV;
goto abort_unlock;
}
--
2.25.4