[PATCH 3/3] nbd: show read-only state in sysfs

Paolo Bonzini
2013-02-12T16:06:33Z

Pass the read-only flag to set_device_ro, so that it will be
visible to the block layer and in sysfs.

Cc: <nbd-general@lists.sf.net>
Cc: Paul Clements <Paul.Clements@steeleye.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
drivers/block/nbd.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index a9c5c7a..ef17c2e 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;
--
1.7.1