diff mbox series

[4.19,097/115] bdev: Refresh bdev size for disks without partitioning

Message ID 20200107205307.375255965@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Jan. 7, 2020, 8:55 p.m. UTC 
From: Jan Kara <jack@suse.cz>

commit cba22d86e0a10b7070d2e6a7379dbea51aa0883c upstream.

Currently, block device size in not updated on second and further open
for block devices where partition scan is disabled. This is particularly
annoying for example for DVD drives as that means block device size does
not get updated once the media is inserted into a drive if the device is
already open when inserting the media. This is actually always the case
for example when pktcdvd is in use.

Fix the problem by revalidating block device size on every open even for
devices with partition scan disabled.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/block_dev.c |   19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)
diff mbox series

Patch

--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1328,11 +1328,7 @@  static void flush_disk(struct block_devi
 		       "resized disk %s\n",
 		       bdev->bd_disk ? bdev->bd_disk->disk_name : "");
 	}
-
-	if (!bdev->bd_disk)
-		return;
-	if (disk_part_scan_enabled(bdev->bd_disk))
-		bdev->bd_invalidated = 1;
+	bdev->bd_invalidated = 1;
 }
 
 /**
@@ -1432,10 +1428,15 @@  static void __blkdev_put(struct block_de
 
 static void bdev_disk_changed(struct block_device *bdev, bool invalidate)
 {
-	if (invalidate)
-		invalidate_partitions(bdev->bd_disk, bdev);
-	else
-		rescan_partitions(bdev->bd_disk, bdev);
+	if (disk_part_scan_enabled(bdev->bd_disk)) {
+		if (invalidate)
+			invalidate_partitions(bdev->bd_disk, bdev);
+		else
+			rescan_partitions(bdev->bd_disk, bdev);
+	} else {
+		check_disk_size_change(bdev->bd_disk, bdev, !invalidate);
+		bdev->bd_invalidated = 0;
+	}
 }
 
 /*