[CRIU] File size is not same on restore

[上司陽平]

Thank you for replying but I can not solve this question...

>> I succeeded to dump a lxc container but I can't restore it.
>>
>> A log of restore has following error messages:
>> (00.200896)    146: Error (files-reg.c:1078): File
>> lib/x86_64-linux-gnu/libcgmanager.so.0.0.0 has bad size 137024 (expect
>> 108480)
> This message means that at the restore time file's libcgmanager.so size
> is 137024.
>
Why is libcgmanager.so size 137024 at the restore time?
I checked a status on host OS,
$ stat /var/lib/lxc/u1/rootfs/lib/x86_64-linux-gnu/libcgmanager.so.0.0.0
This file's size is 108480.
Then I checked stat on the lxc container
$ stat /lib/x86_64-linux-gnu/libcgmanager.so.0.0.0
This file's size is 108480.
Therefore I think that libcgmanager.so size can not become 137024.
What is added to libcgmanager.so size?

In addition, what should I do to solve this error problem?

Thanks,
Yohei Kamitsukasa


On 11/9/15 17:50, Pavel Emelyanov wrote:
> On 11/08/2015 04:45 AM, 上司陽平 wrote:
>> Hi, I have an error and want to help me.
>> I succeeded to dump a lxc container but I can't restore it.
>>
>> A log of restore has following error messages:
>> (00.200896)    146: Error (files-reg.c:1078): File
>> lib/x86_64-linux-gnu/libcgmanager.so.0.0.0 has bad size 137024 (expect
>> 108480)
> This message means that at the restore time file's libcgmanager.so size
> is 137024.
>
>> (00.200902)    258:     pr2 Read page 7f79620bf000 from self
>> 7f79620bf000/4f000
>> (00.200906)    146: Error (cr-restore.c:257): Can't fixup VMA's fd
>>
>> I checked a status on host OS,
>> $ stat /var/lib/lxc/u1/rootfs/lib/x86_64-linux-gnu/libcgmanager.so.0.0.0
>> This file's size is 108480.
>> Then I checked stat on the lxc container
>> $ stat /lib/x86_64-linux-gnu/libcgmanager.so.0.0.0
>> This file's size is 108480, it is same!!
>>
>> Therefore I injected debug print at the dump_one_reg_file function in
>> files-reg.c.
>>
>> if (S_ISREG(p->stat.st_mode) && should_check_size(rfe.flags)) {
>>                   rfe.has_size = true;
>>                   rfe.size = p->stat.st_size;
>>                   pr_debug("Debug: %s has %"PRIu64"\n", rfe.name, rfe.size);
>> }
>>
>> This printed in the log of dump,
>> (00.113142) Debug: /lib/x86_64-linux-gnu/libcgmanager.so.0.0.0 has 108480
> Yes 108480 is what was seen at dump time.
>
>> I think that size information of an open file is stored to an image file
>> after this checking.
>> However this size is not same on restore.
>>
>> ENV is following:
>> uname -a ->
>> Linux uhoi 4.2.5 #1 SMP Wed Oct 28 14:39:35 JST 2015 x86_64 x86_64
>> x86_64 GNU/Linux
>> criu -V ->
>> Version: 1.7.2
>> GitID: v1.7-17-g2bf517e
>>
>> Someone please tell me how to resolve these errors.
>> Appreciate your helping hands.
>>
>> Thanks,
>> Yohei Kamitsukasa
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>>