Re: ext4 inode tagging

On 01/12/2012 03:13 AM, Herbert Poetzl wrote:
> On Wed, Jan 11, 2012 at 07:31:09PM +0100, Roberto Puzzanghera wrote:
>> Hello,
>>
>> I failed to tag my ext4 /vservers' partition and I found out
>> that this is not yet supported for ext4.
> hmm, what kernel/patch do you use?

# vserver-info
Versions:
                    Kernel: 3.1.4-vs2.3.2.1-smp
                    VS-API: 0x00020308
                       VCI: 0x0000000013000f11
              util-vserver: 0.30.216-pre3004; Dec  5 2011, 15:29:49

Features:
                        CC: gcc, gcc (GCC) 4.5.2
                  CPPFLAGS: ''
                    CFLAGS: '-g -O2 -std=c99 -Wall -pedantic -W 
-funit-at-a-time'
                build/host: 
x86_64-unknown-linux-gnu/x86_64-unknown-linux-gnu
              Use dietlibc: yes
        Build C++ programs:
        Build C99 programs: yes
            Available APIs: v13,net,v21,v22,v23,netv2
             ext2fs Source: e2fsprogs
     syscall(2) invocation: alternative
       vserver(2) syscall#: 236/glibc
                crypto api: beecrypt
           python bindings: no
    use library versioning: yes

>
> it might not be working as expected as nobody I know
> uses ext4 (too fragile and buggy) yet, but it should
> definitely be supported/implemented in recent kernels
>
>> As I have to decide to switch to ext3 or wait, is there any
>> plan to implement this funcionality in the near future?
> a good start would be to produce a test case which
> goes wrong for you, so that we can look into it
>
> best,
> Herbert

I'm following the howto on the wiki. The /vservers partition is mounted 
with "-o tag" as explained, but when I try to tag the guest's files I 
get the following error:

# chxid -URx -c slacky /vservers/<vserver-name>/
/vservers/<vserver-name>/<file-name>: Invalid argument
... and so on

Of course, in case the linux-vserver team needs it, I would be glad to 
provide the access to my server for a test with ext4.

Best regards
Roberto Puzzanghera