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  1. 01 Mar, 2017 3 commits
    • Andrei Vagin's avatar
      fdstore: add synchronization to protect a peek offset · 7dc7030d
      Andrei Vagin authored 
      When we need to get a file descriptor, we have to set peek offset
and then to peek a message. There are two system calls, so we need
to be sure that nobody changes a socket peek offset after we set it.
Acked-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: 's avatarAndrei Vagin <avagin@virtuozzo.com>
      7dc7030d
    • Andrei Vagin's avatar
      fdstore: add a storage for file descriptors (v2) · 4d06aa12
      Andrei Vagin authored 
      We need a storage for file descriptors which is shared between processes
and doesn't use a lot of file descriptors. We are going to use it on
restore and if it will use file descriptors, we will have to find
descriptors which don't used by all restored processes to not confilict
with their descriptors.

There are two solutions. The first one is a service (process) which
handles to command push_fd(id, fd) and pop_fd(id, fd).

Another solution is to save descriptros in a unix socket.  It requires
only one extra descriptor which we can register as a service fd. Each
unix socket has a buffer and can fit a number of file descriptros. We
can use SK_PEEK_OFF and MSG_PEEK to get file descriptros from a socket
as many times as we need.

This patch implements the second solution.

v2: call recvmsg with MSG_PEEK
travis-ci: success for A few fixes to c/r a docker container with a console (rev3)
Signed-off-by: 's avatarAndrei Vagin <avagin@virtuozzo.com>
Signed-off-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
      4d06aa12
    • Andrei Vagin's avatar
      tty: notify about orphan tty-s via rpc · 6afe523d
      Andrei Vagin authored 
      Now Docker creates a pty pair from a container devpts to use is as console.
A slave tty is set as a control tty for the init process and bind-mounted
into /dev/console. The master tty is handled externelly.

Now CRIU can handle external resources, but here we have internal resources
which are used externaly.

https://github.com/opencontainers/runc/issues/1202
travis-ci: success for A few fixes to c/r a docker container with a console (rev3)
Signed-off-by: 's avatarAndrei Vagin <avagin@virtuozzo.com>
Signed-off-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
      6afe523d
  3. 17 Feb, 2017 4 commits
  5. 13 Feb, 2017 1 commit
    • Pavel Emelyanov's avatar
      criu: Version 2.11 · 8719b7c9
      Pavel Emelyanov authored 
      This is a bugfix-mostly release. Interesting new features include
the huge rework of files restoring engine which fixed us bugs we
haven't seen in reality :) but have proven they exist. Als this
rework opens the way for scm-rigts c/r we need for nginx.
Signed-off-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
      8719b7c9
  7. 09 Feb, 2017 1 commit
  9. 08 Feb, 2017 2 commits
  11. 07 Feb, 2017 1 commit
    • Adrian Reber's avatar
      xsave: check for X86_FEATURE_OSXSAVE rather than for X86_FEATURE_XSAVE · 7ac2d79c
      Adrian Reber authored 
      Migrating a process between a system with the 'xsave' CPU flag and
another system without the 'xsave' CPU flags is not possible and
fails during restore. To avoid this situation it is possible to boot
the source system of the migration with 'noxsave' kernel command-line.

Unfortunately criu currently tries to detect the presence of 'xsave'
with the macro X86_FEATURE_XSAVE which represents the features of
the CPU without taking into account if the operating system has
disabled 'xsave'. Checking for 'xsave' availability with the macro
X86_FEATURE_OSXSAVE detects correctly if Linux has been booted
with disabled 'xsave' and thus migrating processes between hosts
with and without 'xsave' is possible if the kernel uses the flag
'noxsave'.

travis-ci: success for criu dump fails when using noxsave (rev2)
Signed-off-by: 's avatarAdrian Reber <areber@redhat.com>
Reviewed-by: 's avatarCyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: 's avatarPavel Emelyanov <xemul@virtuozzo.com>
      7ac2d79c
  13. 06 Feb, 2017 28 commits