linux-ext4 - Re: [PATCH 15/27] block: use bdev_alignment_offset in part_alignment_offset

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>] [day] [month] [year] [list]

Message-ID: <20220406070446.GA1722@ts.fujitsu.com>
Date:   Wed, 6 Apr 2022 09:04:46 +0200
From:   Alan.Robinson@...itsu.com (Alan Robinson)
To:     Christoph Hellwig <hch@....de>
Cc:     Jens Axboe <axboe@...nel.dk>,
        "jfs-discussion@...ts.sourceforge.net" 
        <jfs-discussion@...ts.sourceforge.net>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "dm-devel@...hat.com" <dm-devel@...hat.com>,
        "target-devel@...r.kernel.org" <target-devel@...r.kernel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "drbd-dev@...ts.linbit.com" <drbd-dev@...ts.linbit.com>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        "linux-nilfs@...r.kernel.org" <linux-nilfs@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "cluster-devel@...hat.com" <cluster-devel@...hat.com>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
        "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
        "linux-um@...ts.infradead.org" <linux-um@...ts.infradead.org>,
        "nbd@...er.debian.org" <nbd@...er.debian.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-bcache@...r.kernel.org" <linux-bcache@...r.kernel.org>,
        "ceph-devel@...r.kernel.org" <ceph-devel@...r.kernel.org>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-f2fs-devel@...ts.sourceforge.net" 
        <linux-f2fs-devel@...ts.sourceforge.net>,
        "linux-xfs@...r.kernel.org" <linux-xfs@...r.kernel.org>,
        "ocfs2-devel@....oracle.com" <ocfs2-devel@....oracle.com>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "ntfs3@...ts.linux.dev" <ntfs3@...ts.linux.dev>,
        "linux-btrfs@...r.kernel.org" <linux-btrfs@...r.kernel.org>
Subject: Re: [PATCH 15/27] block: use bdev_alignment_offset in
 part_alignment_offset_show

Hi Christoph,

On Wed, Apr 06, 2022 at 06:05:04AM +0000, Christoph Hellwig wrote:
> From: Christoph Hellwig <hch@....de>
> Subject: [PATCH 15/27] block: use bdev_alignment_offset in
>  part_alignment_offset_show
> 
> Replace the open coded offset calculation with the proper helper.
> This is an ABI change in that the -1 for a misaligned partition is
> properly propagated, which can be considered a bug fix and maches

s/maches/matches/

> what is done on the whole device.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
>  block/partitions/core.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/block/partitions/core.c b/block/partitions/core.c
> index 2ef8dfa1e5c85..240b3fff521e4 100644
> --- a/block/partitions/core.c
> +++ b/block/partitions/core.c
> @@ -200,11 +200,7 @@ static ssize_t part_ro_show(struct device *dev,
>  static ssize_t part_alignment_offset_show(struct device *dev,
>  					  struct device_attribute *attr, char *buf)
>  {
> -	struct block_device *bdev = dev_to_bdev(dev);
> -
> -	return sprintf(buf, "%u\n",
> -		queue_limit_alignment_offset(&bdev_get_queue(bdev)->limits,
> -				bdev->bd_start_sect));
> +	return sprintf(buf, "%u\n", bdev_alignment_offset(dev_to_bdev(dev)));

Should this now be %d instead of %u, there are one or two examples of
both in the rest of the patch series.

Alan