hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I53Q6M
CVE: NA

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Currently, we don't have an easy way to figure out a corrupted file
system which has been writen data through the raw block device.
It is risky to open a block device exclusively which has been
opened for write by some other processes since this may lead to
potential data corruption. This patch record the exclusive openers
and give a hint if that happens.
Signed-off-by: NLi Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Nzhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>