[PATCH 006 of 7] md: Allow an md array to appear with 0 drives if it has external metadata.
From: NeilBrown <hidden>
Date: 2007-12-14 06:29:35
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Signed-off-by: Neil Brown <redacted> ### Diffstat output ./drivers/md/md.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c 2007-12-14 16:09:03.000000000 +1100
+++ ./drivers/md/md.c 2007-12-14 16:09:09.000000000 +1100@@ -4650,9 +4650,10 @@ static int md_ioctl(struct inode *inode, */ /* 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; }