linux-kernel - Re: [RFC] Rollback FS

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Message-ID: <CAFLxGvwgd95ZOGZ_F1_S9skqbrZ2wVV4Zwrd7Q9m92G_4RTnPA@mail.gmail.com>
Date:	Sun, 20 Oct 2013 09:57:16 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	jiaweiwei <jiaweiwei.xiyou@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Harry Wei <harryxiyou@...il.com>
Subject: Re: [RFC] Rollback FS

On Sun, Oct 20, 2013 at 9:06 AM, jiaweiwei <jiaweiwei.xiyou@...il.com> wrote:
> Hi all,
>
> Recently, I just do some stupid stuffs as follows.
>
> # mv /lib/x86_64-linux-gnu/libc.so.6  /tmp
>
> After move "/lib/x86_64-linux-gnu/libc.so.6" away, you could not run lots
> of commands, which show you some errors like this.
>
> # ls
> ls: error while loading shared libraries: libc.so.6: cannot open
> shared object file: No such file or directory
> # mv
> mv: error while loading shared libraries: libc.so.6: cannot open
> shared object file: No such file or directory
> ...
>
> Because they all depend on libc.so.
>
> You could also happen to above boring stuffs when you remove some key
> files in Linux OS. Now, I have a good idea to solve above problems.
>
> We could implement a File System to record all the operations which
> send to VFS. Then when you think you have done a mistake command, you
> could rollback from this File System.
>
> This is just a RFC, I would give detail implementations. Would anyone
> please give me some suggestions? Thanks very much.

What about having a good backup and a statically linked busybox somewhere on
your filesystem?

-- 
Thanks,
//richard
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