linux-kernel - [PATCH 002 of 4] md: Simplify checking of available size when resizing an array

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id:  <1061023070754.29236@suse.de>
Date:	Mon, 23 Oct 2006 17:07:54 +1000
From:	NeilBrown <neilb@...e.de>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 002 of 4] md: Simplify checking of available size when resizing an array


When "mdadm --grow --size=xxx" is used to resize an array (use more or
less of each device), we check the new siza against the available
space in each device.

The already have that number recorded in rdev->size, so calculating it
is pointless (and wrong in one obscure case).

Signed-off-by: Neil Brown <neilb@...e.de>

### Diffstat output
 ./drivers/md/md.c |    7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c	2006-10-23 16:35:05.000000000 +1000
+++ ./drivers/md/md.c	2006-10-23 16:35:21.000000000 +1000
@@ -4047,11 +4047,8 @@ static int update_size(mddev_t *mddev, u
 		return -EBUSY;
 	ITERATE_RDEV(mddev,rdev,tmp) {
 		sector_t avail;
-		if (rdev->sb_offset > rdev->data_offset)
-			avail = (rdev->sb_offset*2) - rdev->data_offset;
-		else
-			avail = get_capacity(rdev->bdev->bd_disk)
-				- rdev->data_offset;
+		avail = rdev->size * 2;
+
 		if (fit && (size == 0 || size > avail/2))
 			size = avail/2;
 		if (avail < ((sector_t)size << 1))
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/