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  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, 23 May 2017 10:42:31 +0200
From:   Richard Weinberger <>
To:     Christoph Hellwig <>
Subject: Re: [PATCH 4/6] ubifs: Maintain a parent pointer


Am 23.05.2017 um 10:37 schrieb Christoph Hellwig:
> On Sun, May 21, 2017 at 10:20:49PM +0200, Richard Weinberger wrote:
>> The new feature UBIFS_FLG_PARENTPOINTER allows looking
>> up the parent. Usually the Linux VFS walks down the filesystem
>> and no parent pointers are needed. But when a filesystem
>> is exportable via NFS such a lookup is needed.
>> We can use a padding field in struct ubifs_ino_node to
>> maintain a pointer to the parent inode.
> Note that nfsd/exportfs will only do this for directories, and beacause
> we hardlinks for other objects that is an important distinction.
> I think the ubifs code should make sure to only maintain the parent
> pointers for directories, otherwise confusion and abuses will happen.

Thanks for the info, I'll massage the code in that direction.


Powered by blists - more mailing lists