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From: Yufen Yu <yuyufen@huawei.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: <linux-block@vger.kernel.org>, <jack@suse.cz>, <hare@suse.de>,
	<ming.lei@redhat.com>, <damien.lemoal@wdc.com>
Subject: Re: [PATCH] block: check disk exist before trying to add partition
Date: Thu, 10 Jun 2021 10:30:55 +0800	[thread overview]
Message-ID: <1221eb2f-d778-755e-f69f-58ce549c5771@huawei.com> (raw)
In-Reply-To: <8e7e4b2a-b0e2-9830-e2bc-cbc6e9fd7b41@kernel.dk>



On 2021/6/9 5:08, Jens Axboe wrote:
> On 6/8/21 3:27 AM, Yufen Yu wrote:
>> If disk have been deleted, we should return fail for ioctl
>> BLKPG_DEL_PARTITION. Otherwise, the directory /sys/class/block
>> may remain invalid symlinks file. The race as following:
>>
>> blkdev_open
>> 				del_gendisk
>> 				    disk->flags &= ~GENHD_FL_UP;
>> 				    blk_drop_partitions
>> blkpg_ioctl
>>      bdev_add_partition
>>      add_partition
>>          device_add
>> 	    device_add_class_symlinks
>>
>> ioctl may add_partition after del_gendisk() have tried to delete
>> partitions. Then, symlinks file will be created.
> 
> Let's do this for 5.14, which means send it against for-5.14/block
> please. Thanks.
> 

OK, I have send v2 for 5.14/block.
https://lore.kernel.org/linux-block/20210610023241.3646241-1-yuyufen@huawei.com/T/#u

Thanks,
Yufen

  reply	other threads:[~2021-06-10  2:30 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-08  9:27 Yufen Yu
2021-06-08 10:08 ` Jan Kara
2021-06-08 17:10 ` Christoph Hellwig
2021-06-08 21:08 ` Jens Axboe
2021-06-10  2:30   ` Yufen Yu [this message]
2021-06-10  6:28 ` Ming Lei

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