This patch reworks fixup_aufs_vma_fd() to let symbolic links in
/proc/<pid>/map_files that are not pointing to AUFS branch names follow
the non-AUFS applcation logic.

The use case that prompted this commit was an application mapping
/dev/zero as shared and writeable which shows up in map_files as:

lrw------- ... 7fc5c5a5f000-7fc5c5a60000 -> /dev/zero (deleted)

If the AUFS support code reads the link, it will have to strip off the
" (deleted)" string added by the kernel but core CRIU code already
does this.
Signed-off-by: Saied Kazemi <saied@google.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Currently we run into lots of race conditions when building in
multithreded mode.

Reported-by: Mr Jenkins
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Acked-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Pavel reported that decimal values for some fields are hard to read,
because people used to see hex values in there. Unfortunately, json
doesn't support hex representation of integers, so we can only store
them as hex strings. Not all field need to be represented as hex
strings, so this set introduces a custom field option called "criu"
to use in our proto files. One should use [(criu).hex = true] to mark
which field should be represented as a hex string. pb2dict module
from pycriu package will look into field options and if he finds that
criu.hex is set to True, it will convert such field to/from hex string.
Though, such behaviour is optional and user can request it by specifying
 --format hex when calling crit decode("crit encode" in its turn, detects
such fields automatically and doesn't require any special cmdline options
to be set).

We need our proto files to compile with both protoc and
protoc-c compilers, which requires creating google/protobuf
directory with a symlink to /usr/include/google/protobuf/
descriptor.proto to make protoc-c and generated c files happy.
Reported-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The code that fixes up AUFS pathnames associated with vma entries (see
commit d8b41b65) should handle cases where an entry does not expose
the branch pathname (e.g., pointing to a device like /dev/zero).
Signed-off-by: Saied Kazemi <saied@google.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Currently we are handling conversion in the simplest way, by
just parsing protobuf text format representation of pb message,
splitting string in half and storing values wrapped in ""-s
in python dict. Which leads to a bunch of errors, like,
for example, when converting bytes fields. It also doesn't
handle types properly.

This patch introduces a proper way to handle pb<->json conversion
by iterating through pb fields and properly storing them in dict
or properly extracting values from dict.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pagemap.img is the special one, as it starts with an entry
of pagemap_head type and is followed by entries of
pagemap_entry type. Currently we treat pagemap as if
pagemap_head is a payload and pagemap_entry's are
an extra, which is wrong.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Before:
{
    "magic" : "FOO",
    "entries" : [
        {
            "payload" : {
                "foo" : "bar",
                "bar" : "foo"
            },
            "extra" : "abc"
        },
        {
            "payload" : {
            "foo" : "bar",
            "bar" : "foo"
            },
            "extra" : "abc"
        }
    ]
}

After:
{
    "magic" : "FOO",
    "entries" : [
        {
            "foo" : "bar",
            "bar" : "foo"
            "extra" : "abc"
        },
        {
            "foo" : "bar",
            "bar" : "foo"
            "extra" : "abc"
        }
    ]
}

We don't have any fields named "extra" in our pb msgs and it is
not likely that we will ever have one, so there is no reason to
worry about that.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Test steps:
1) generate img files by dumping loop.sh
2) convert img files to json files
3) convert json files to img files
4) cmp original and produces img files

It also uses i/o redirection and --format nice options to
check if they work properly.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

install-crit uses scripts/crit-setup.py install --prefix=$(DESTDIR)
to act the way the install target expects it too.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

This is a small python scipt that uses distutils to install crit script
and pycriu package.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

crit is a python script that helps user to manipulate criu
images. For now, it can only convert criu images to\from
human-readable format using pycriu.images module.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pycriu is a python package, that, for now, consists
of rpc module and images package. rpc module contains
data structures for interacting with CRIU RPC.
images package contains methods for loading\dumping
criu images.

See a big comment below in pycriu/images/images.py file.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

This script is needed to generate python module from
include/magic.h file, that contains dicts with magic
numbers that we put into our criu *.img files.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The newer cleanups in fd inherit code need every file-desc
to have non-NULL ops. This hunk was lost in tty code in the
very beginning.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

When restoring a pair of veth devices that had one end inside a namespace
or container and the other end outside, CRIU creates a new veth pair,
puts one end in the namespace/container, and names the other end from
what's specified in the --veth-pair IN=OUT command line option.

This patch allows for appending a bridge name to the OUT string in the
form of OUT@<BRIDGE-NAME> in order for CRIU to move the outside veth to
the named bridge.  For example, --veth-pair eth0=veth1@br0 tells CRIU
to name the peer of eth0 veth1 and move it to bridge br0.

This is a simple and handy extension of the --veth-pair option that
obviates the need for an action script although one can still do the same
(and possibly more) if they prefer to use action scripts.
Signed-off-by: Saied Kazemi <saied@google.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The stack handling in the RUN_CLONE_RESTORE_FN macro for
AArch64 was incorrect, resulting in a segfault of the restored
process. With this change the pthread00 test case (and probably
others) runs to completion and passes.
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We have a nasty issue with it. Current code allocates these
entries in shremap area one by one. We do NOT allocate any
OTHER entries in this region, but if we will this array will
be spoiled.

Fortunately we no longer need shmem-infos as plain array,
neither we need one in restorer. So just turn this into plain
shared objects and collect them in a list.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The struct and find routine used to be use by restorer code. Now
the former fully uses vmas and fd opened, so we can move the code
into .c file not to spoil global namespace.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We have two places where we lookup the inherited-fd list
by name and dup() the descriptor found. I propose to factor
out this piece in a single inherited_fd() call. When
we will want to support inheritance for sockets or any
other files we'll simply add the inherited_fd() call
there.

I'm also thinking about moving the call to inherited_fd
into generic level, but the open_path() routine doesn't
allow to do it in a simple manner.

Also we have not yet finished issue with files-vs-inodes
mapping. Keeping all the logic in one function should
make the solution simpler.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Mark A. O'Neill <mao@tumblingdice.co.uk>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

This patch adds code to the contrib/docker_cr.sh helper script for trying
to determine the external bind mount file for dockerinit if the user
has not explicitly specified it via the DOCKERINIT_BINARY environment
variable.
Signed-off-by: Saied Kazemi <saied@google.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Reported-by: Mr Travis
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>