These are setXXXid, capset and various bits for prctl and caps machinery.
The thing is that the caps API is not yet fully in glibc so we have to
declare some bits even for core code, not just for restorer/parasite.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

All the IDs and caps are in there. Just read them for future use.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Add command and basis for dumping minor bits for task
from parasite code. It's supposed to retrieve minor bits
form tasks which cannot be read from /proc.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

I occasionally droppped this file but it's
a part of commit

dcd64e9d

So add it back.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Andrey Vagin <avagin@openvz.org>

Just disable it for a while, otherwise we get
in test/zdtm/live/streaming/netlink00.c

cc1: warnings being treated as errors
netlink00.c: In function ‘form_request_del’:
netlink00.c:311: error: dereferencing pointer ‘rtap’ does break strict-aliasing rules
netlink00.c:312: error: dereferencing pointer ‘rtap’ does break strict-aliasing rules
netlink00.c:310: note: initialized from here
netlink00.c: In function ‘form_request_add’:
netlink00.c:271: error: dereferencing pointer ‘rtap’ does break strict-aliasing rules
netlink00.c:272: error: dereferencing pointer ‘rtap’ does break strict-aliasing rules
netlink00.c:270: note: initialized from here
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

It's outdated anyway.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

This covers UNIX stream sockets including
in-flight connections.

No dgram sockets yet implemented.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

It's done in two steps

 - On checkpoint we find which icons are present
   over all sockets and setup peer number to
   appropriate listening socket

 - On restore we collect listening sockets and once
   we find in-flight connection we search for appropriate
   listening socket name and use it to call connect() then
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Otherwise debug printing has no inode number in report.
Not really it's that important but very convenient
if you need detailed output.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

* 'zdtm' of https://github.com/avagin/crtools:
  zdtm: remove warnings
  zdtm: move tast_daemon after preparation actions
  zdtm: fix warnings in mmx00.c
  zdtm: say no to EINTR
  zdtm: fix warning in Makefile
  zdtm: fix warning in transition/ptrace.c
  zdtm: initilize a variable in cmdlinenv00.c

It may be legal. E.g. for zombie
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

mmx00.c:22:34: warning: array subscript is above array bounds
[-Warray-bounds]
mmx00.c:22:34: warning: array subscript is above array bounds
[-Warray-bounds]

PSUBW handles 64 bits.

Otherwise if restored task exit we get error message in form

 | Error (cr-restore.c:1302): 7244 exited, status=0

while restored task simply finished working.
Pointed-out-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

Everyone have known that EINTR is returned due to cpt/rst.
But it's error, we forgot to set SA_RESTART;).

Makefile:100: warning: overriding commands for target cmdlinenv00.pid'
Makefile:91: warning: ignoring old commands for target cmdlinenv00.pid'

Otherwise use-after-free error happens.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Convenient for debug purpose.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>

This one is actually an internal kernel magic number for pipefs filesystem
and shouldn't be changed.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Existing ones are boring. Let's switch them into geographical coordinates
of various Russian towns in NNNNEEEE form.

4 digits for a coordinate give us up to 2km of inaccuracy, which is more
than enough to find a town. We cannot use longitude further than 99.99,
i.e. we won't cover the Far East region, but that's OK -- there's more than
enough good candidates even in the European part of the country only.

Feel free to extend.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

* handle EINTR
* add more details in an error message
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Plus a small infrastructure change to fork a test task
in a desired namespace.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

Only two fields are modifiable -- hostname and domainname. So
read them on dump and write on restore.

File format is simple --

u32 magic
u32 length of nodename
u8[] nodename string
u32 length of domainname
u8[] domainname string

For OpenVZ we can write the release at the end, but this is later.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

New option -n to dump/restore namespaces.

Fork the namespaces dumping task and write a helper for switching a namespace.

Prepare the restorer code for restoring namespaces before root task.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>

In order to restore task in namespaces we'll have to clone() them,
not fork. Thus switch the restorer into using clone.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>