Usefult to test restore time, for example.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

With new remap refcount users will get the counter
eventually as they appear.

Reported-by: Andrew Vagin <avagin@parallels.com> via Jenkins
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

To link Open MPI against CRIU I need the header files installed.
Attached is a patch which adds the necessary Makefile rules to
install libcriu.so and the header file to compile against CRIU.
Signed-off-by: Adrian Reber <adrian@lisas.de>
Acked-by: Kir Kolyshkin <kir@openvz.org>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

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

With packed reg-files we have a complex fd - file - vma - remap interaction. I
think this should be reflected in the code comment.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

If a file mmaped or pointed by exe link is unlinked, we will
generate a ghost file for it. On restore the ghost file will
be created with the users counter 1 and the very first open
(e.g. for mmap) will unlink the file.

Handle this by bumping up user counter for every mapping
pointing on the file.

This appeared after previous patches that packed the reg-files
image. Before it each vma and exe link created separate entry
in the reg-files image.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We have tons of files with equal IDs, e.g. libraries mapped
to different tasks. No need in writing all this duplicate
stuff into images -- cache the IDs with dev:ino keys.
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

For unlinked opened and mmaped files we'd need to
care about remaps, for this the callback with both
file_desc and fdinfo_list_entry will be required.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

When a process is started in a new pid namespace, the init process must
colleck zombies.

But before this the init process must waits the root test process, which
returns a status of preparation stage.

Currently these two operation can race, because the both ones call waitpid().
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Useful to test restore time -- just abort restore with this
action and that's it.
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

If we specify log level to none (0) the result is LOG_INFO (2).
Acked-by: Andrew Vagin <avagin@parallels.com>
Acked-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Broken by 3929c853Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Broken by bbab13ebSigned-off-by: Pavel Emelyanov <xemul@parallels.com>

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

There are two reasons to ban subdirs in logfile name.
First, process might be in different namespace, so it is right to give us fd
for work dir, just like we did with images dir. Second, as service might be ran
as root, it is unsafe to give an opportunity to fill any dir with trash.
If you wan't to put logs/stats somwhere else than images_dir, you could
set work_dir_fd.
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

As we've added work_dir_fd to RPC, lets add support for it to libcriu.
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>

otherwise it won't compile:

util.c: In function ‘cr_daemon’:
util.c:594:8: error: ignoring return value of ‘chdir’, declared
with attribute warn_unused_result [-Werror=unused-result]
   chdir("/");
        ^
Signed-off-by: Tikhomirov Pavel <snorcht@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We errorneously report nr_compared as total number of restored pages.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

If we've found zero VMAs in MmEntry try to look for
VMAs in vma-.img image file.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

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

When writing VMAs we perform too many small writes into vma-.img files.
This can be easily fixed by moving the vma-s into mm-s, all the more
so they cannot be splitted from each other.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We'll merge mm and vma images, so mm should be read in the
same place where vmas are.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

After previous patch is't now possible.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

On restore we will read all VmaEntries in one big MmEntry object,
so to avoif copying them all into vma_areas, make them be pointable.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

The plan is to merge vma images into mm ones (see further
patching), so prepare the dumping code for that.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Lost from c8d5f1a2Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Currently we check PTRACE_PEEKSIGINFO and if it's defined in a system
header, we suppose that ptrace_peeksiginfo_args is defined there too.

But due to a bug in glibc, this check doesn't work. Now we have F20,
where ptrace_peeksiginfo_args is defined in sys/ptrace and F21 where
it isn't defined.

commit 9341dde4d56ca71b61b47c8b87a06e6d5813ed0e
Author: Mike Frysinger <vapier@gentoo.org>
Date:   Sun Jan 5 16:07:13 2014 -0500

    ptrace.h: add __ prefix to ptrace_peeksiginfo_args
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Right now we do it two times -- on shmem prepare and
on the restore itself. Make collection only once as
we do for fdinfo-s -- root task reads all stuff in and
populates tasks' rst_info with it.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

We'll collect VmaEntries early before fork.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

In /proc/<pid>/smaps/ output we may omit testing
for capital hex letters, since we know the format
kernel provides.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

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

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

When reading pagemaps, we read it from specific position. To
do it, we called lseek, then read. Fortunetely, there's a
syscall that does both things in one call -- pread. Since
we don't need to keep pagemap's position for further reads,
it perfectly suits our needs.

This removes 75% of lseek calls when dumping basic container.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>