From a83e814b5bb948850e903585d18b6298b7093cb2 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 27 Feb 2013 17:05:26 -0800 Subject: [PATCH] nbd: show read-only state in sysfs Pass the read-only flag to set_device_ro, so that it will be visible to the block layer and in sysfs. Signed-off-by: Paolo Bonzini Cc: Paul Clements Cc: Alex Bligh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/block/nbd.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 869861a..52003d7 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -703,6 +703,8 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, mutex_unlock(&nbd->tx_lock); + if (nbd->flags & NBD_FLAG_READ_ONLY) + set_device_ro(bdev, true); if (nbd->flags & NBD_FLAG_SEND_TRIM) queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue); @@ -730,6 +732,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd, dev_warn(disk_to_dev(nbd->disk), "queue cleared\n"); kill_bdev(bdev); queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue); + set_device_ro(bdev, false); if (file) fput(file); nbd->flags = 0; -- 2.7.4