a question about opening file

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Subject: a question about opening file
From: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
Date: Thu, 05 Nov 2020 09:48:42 +0800
Cc: "cgxu519" <cgxu519@xxxxxxxxxxxx>
Importance: Medium
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Reply-to: cgxu519@xxxxxxxxxxxx
User-agent: ZohoCN Mail

Hello,
 
I have a question about opening file of underlying filesystem in overlayfs,

why we use overlayfs' path(vfsmount/dentry) struct for underlying fs' file  

in ovl_open_realfile()?  Is it by design?


Thanks,
Chengguang

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