Messages in this thread | | | Subject | Re: [RFC] Rollback FS | From | Vyacheslav Dubeyko <> | Date | Sun, 20 Oct 2013 14:43:15 +0400 |
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On Oct 20, 2013, at 11:06 AM, jiaweiwei 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.
Anyway, you need to use Copy-On-Write (COW) approach for such file system. But there are file systems that implements snapshot approach yet: NILFS2, ext3cow, Next3, and so on.
Do you really want to implement something likewise snapshot feature in a file system from the scratch?
With the best regards, Vyacheslav Dubeyko.
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