linux-ext4 - Re: [PATCH RFC v2 for-6.8/block 01/18] block: add some bdev apis

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]

Date: Tue, 12 Dec 2023 09:25:24 +0800
From: Yu Kuai <yukuai1@...weicloud.com>
To: Jan Kara <jack@...e.cz>, Yu Kuai <yukuai1@...weicloud.com>
Cc: axboe@...nel.dk, roger.pau@...rix.com, colyli@...e.de,
 kent.overstreet@...il.com, joern@...ybastard.org, miquel.raynal@...tlin.com,
 richard@....at, vigneshr@...com, sth@...ux.ibm.com, hoeppner@...ux.ibm.com,
 hca@...ux.ibm.com, gor@...ux.ibm.com, agordeev@...ux.ibm.com,
 jejb@...ux.ibm.com, martin.petersen@...cle.com, clm@...com,
 josef@...icpanda.com, dsterba@...e.com, viro@...iv.linux.org.uk,
 brauner@...nel.org, nico@...xnic.net, xiang@...nel.org, chao@...nel.org,
 tytso@....edu, adilger.kernel@...ger.ca, agruenba@...hat.com, jack@...e.com,
 konishi.ryusuke@...il.com, willy@...radead.org, akpm@...ux-foundation.org,
 p.raghav@...sung.com, hare@...e.de, linux-block@...r.kernel.org,
 linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
 linux-bcache@...r.kernel.org, linux-mtd@...ts.infradead.org,
 linux-s390@...r.kernel.org, linux-scsi@...r.kernel.org,
 linux-bcachefs@...r.kernel.org, linux-btrfs@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, linux-erofs@...ts.ozlabs.org,
 linux-ext4@...r.kernel.org, gfs2@...ts.linux.dev,
 linux-nilfs@...r.kernel.org, yi.zhang@...wei.com, yangerkun@...wei.com,
 "yukuai (C)" <yukuai3@...wei.com>
Subject: Re: [PATCH RFC v2 for-6.8/block 01/18] block: add some bdev apis

Hi,

在 2023/12/12 0:52, Jan Kara 写道:
> On Mon 11-12-23 22:05:35, Yu Kuai wrote:
>> From: Yu Kuai <yukuai3@...wei.com>
>>
>> Those apis will be used for other modules, so that bd_inode won't be
>> accessed directly from other modules.
>>
>> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> 
> ...
> 
>> +void bdev_associated_mapping(struct block_device *bdev,
>> +			     struct address_space *mapping)
>> +{
>> +	mapping->host = bdev->bd_inode;
>> +}
> 
> Here I'm not sure - is the helper really a win? It seems a bit obscure to
> me. This initialization of another mapping for a bdev looks really special.

Yes, I don't like this helper at all, but gfs2 is used this way, and I
need this helper to remove 'bd_inode' from block_devcie later. I'm not
familiar with gfs2 at all but perhaps it worth to dig deeper and figure
out a proper way for gfs2.

Thanks,
Kuai
> 
> 								Honza
>