linux-kernel - [PATCH 3/6] Check for device resize when rescanning partitions

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Date:	Thu, 04 Sep 2008 14:27:30 -0600
From:	Andrew Patterson <andrew.patterson@...com>
To:	linux-scsi@...r.kernel.org
Cc:	andrew.patterson@...com, James.Bottomley@...senPartnership.com,
	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
	axboe@...nel.dk, andmike@...ux.vnet.ibm.com, mike.miller@...com,
	genanr@...phone.com, jmoyer@...hat.com
Subject: [PATCH 3/6] Check for device resize when rescanning partitions

Check for device resize when rescanning partitions

Check for device resize in the rescan_partitions() routine. If the device
has been resized, the bdev size is set to match. The rescan_partitions()
routine is called when opening the device and when calling the
BLKRRPART ioctl.

Signed-off-by: Andrew Patterson <andrew.patterson@...com>
---

 fs/partitions/check.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)


diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index e6f378f..77cfe63 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -504,7 +504,6 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
 	res = invalidate_partition(disk, 0);
 	if (res)
 		return res;
-	bdev->bd_invalidated = 0;
 
 	disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
 	while ((part = disk_part_iter_next(&piter)))
@@ -513,6 +512,8 @@ int rescan_partitions(struct gendisk *disk, struct block_device *bdev)
 
 	if (disk->fops->revalidate_disk)
 		disk->fops->revalidate_disk(disk);
+	check_disk_size_change(disk, bdev);
+	bdev->bd_invalidated = 0;
 	if (!get_capacity(disk) || !(state = check_partition(disk, bdev)))
 		return 0;
 	if (IS_ERR(state))	/* I/O error reading the partition table */

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