[PATCH 4/5] nbd: fix how we set bd_invalidated
From: Josef Bacik <jbacik@fb.com>
bd_invalidated is kind of a pain wrt partitions as it really only
triggers the partition rescan if it is set after bd_ops->open() runs, so
setting it when we reset the device isn't useful. We also sporadically
would still have partitions left over in some disconnect cases, so fix
this by always setting bd_invalidated on open if there's no
configuration or if we've had a disconnect action happen, that way the
partition table gets invalidated and rescanned properly.
Signed-off-by: Josef Bacik <jbacik@fb.com>
---
drivers/block/nbd.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index bc47bae9697a..24788bd10c8b 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -240,7 +240,10 @@ static void nbd_size_update(struct nbd_device *nbd)
blk_queue_physical_block_size(nbd->disk->queue, config->blksize);
set_capacity(nbd->disk, config->bytesize >> 9);
if (bdev) {
- bd_set_size(bdev, config->bytesize);
+ if (bdev->bd_disk)
+ bd_set_size(bdev, config->bytesize);
+ else
+ bdev->bd_invalidated = 1;
bdput(bdev);
}
kobject_uevent(&nbd_to_dev(nbd)->kobj, KOBJ_CHANGE);
@@ -961,10 +964,6 @@ static void nbd_bdev_reset(struct block_device *bdev)
if (bdev->bd_openers > 1)
return;
bd_set_size(bdev, 0);
- if (max_part > 0) {
- blkdev_reread_part(bdev);
- bdev->bd_invalidated = 1;
- }
}
static void nbd_parse_flags(struct nbd_device *nbd)
@@ -1279,6 +1278,9 @@ static int nbd_open(struct block_device *bdev, fmode_t mode)
refcount_set(&nbd->config_refs, 1);
refcount_inc(&nbd->refs);
mutex_unlock(&nbd->config_lock);
+ bdev->bd_invalidated = 1;
+ } else if (nbd_disconnected(nbd->config)) {
+ bdev->bd_invalidated = 1;
}
out:
mutex_unlock(&nbd_index_mutex);
--
2.14.3
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