[Devel] crash: vz extension for OpenVZ kernels

[Dave Anderson]

----- Original Message -----
> Dear Dave,
> 
> I've prepared vz crash extension with commands
> useful for troubleshooting of OpenVZ kernel crashes.
> 
> Could you please review the patch and advise how it's better
> to distribute this extension.
> 
> vz extension uses openVZ-specific kernel structures
> and works on OpenVZ kernels only.

Vasily,

I no longer accept extension modules as part of the base
crash utility package.  However, I do offer to host them 
on the crash extension modules page that is available from
the main web site.  Would you like me to post the module there?

Dave



> 
> It implements vzlist, vzps and ctid commands:
> 
> vzlist -- shows list of OpenVZ containers,
> contains Container ID, references to ve_struct
> and parent task inside container.
> 
> crash> vzlist
>      CTID     VE_STRUCT            TASK          PID  COMM
>       121  ffff8801491e7000  ffff8801493d0ff0   95990  init
>       123  ffff880135a37000  ffff8803fb0a3470   95924  init
>       321  ffff88045a778000  ffff880400616300   95923  init
>       700  ffff88019ddae000  ffff88019ddd4fb0   95882  init
>       503  ffff88045a84e800  ffff8803c3c782c0   95902  init
>       122  ffff8804004ea000  ffff88045612afb0   95886  init
>       600  ffff88016e467000  ffff880459d653f0   95885  init
>         0  ffffffff81aaa220  ffff88045e530b30       1  init
> 
> 
> vzps  -- shows list of processes inside of specified container
> 
> crash> vzps -E 121
>      CTID    PID         TASK        COMM
>       121   95990  ffff8801493d0ff0  init
>       121   95996  ffff8803c3e3b0f0  kthreadd/121
>       121   95997  ffff8803cd3aacb0  khelper/121
>       121   97267  ffff880405e4b2f0  udevd
>       121   99341  ffff8803c3fd2440  syslogd
>       121   99404  ffff880405e0c2c0  klogd
>       121   99424  ffff8803fb0f68c0  sshd
>       121   99445  ffff8801493d0500  xinetd
>       121   99557  ffff8804599f9230  sendmail
>       121   99568  ffff8804591b00c0  sendmail
>       121   99583  ffff880203e56f30  httpd
>       121   99594  ffff88016e4e01c0  crond
>       121   99614  ffff8803fb26cf70  xfs
>       121   99624  ffff88045a6ce2c0  saslauthd
>       121   99625  ffff8801ce134ff0  saslauthd
>       121  248691  ffff88040e2ee9c0  httpd
> 
> ctid -- shows ContainerID for given task
> crash> ctid 99614
>      CTID    PID         TASK        COMM
>       121   99614  ffff8803fb26cf70  xfs
> 
> 
> Thank you,
> 	Vasily Averin
>