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Dumping process using external hdd as block device #2348

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benibela opened this issue Feb 13, 2024 · 1 comment
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Dumping process using external hdd as block device #2348

benibela opened this issue Feb 13, 2024 · 1 comment

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@benibela
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I need to stop a program working on my external hdd partition directly. (it is taking too long and i need to go on a transatlantic flight)

I tried

 criu dump -t 19099 --external dev[8/34]:/dev/sdc2

but it does not want to:


Error (criu/files-ext.c:94): Can't dump file 3 of that type [60660] (unknown /dev/sdc2)
Error (criu/cr-dump.c:1361): Dump files (pid: 19099) failed with -1
Error (criu/cr-dump.c:1781): Dumping FAILED.

how does one do this?
@benibela benibela mentioned this issue Feb 15, 2024
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@Snorch
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Snorch commented Feb 26, 2024 •
edited
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CRIU does not support dumping block device files.

#define S_IFBLK  0060000

You may want to look on https://criu.org/Inheriting_FDs_on_restore to learn how you can use external file CRIU options to overcome this.

upd: Ok I was wrong, external option does not work with block devices either.

There is a plugin external file option which might help, see how it is used in amdgpu plugin https://github.com/checkpoint-restore/criu/blob/criu-dev/plugins/amdgpu/amdgpu_plugin.c#L1332

@Snorch Snorch closed this as completed Feb 26, 2024
YarBor pushed a commit to YarBor/criu that referenced this issue Feb 26, 2024
Related checkpoint-restore#2348 :clear created a bunch of empty direc…
06fb946 
…tories, When many duḿps failed

Signed-off-by: YarBor <yarbor.ww@gmail.com>
YarBor pushed a commit to YarBor/criu that referenced this issue Feb 26, 2024
criu: fix tempdir recycle : Fixes: checkpoint-restore#2351
e5c1c6a 
When many duḿps failed in checkpoint-restore#2348, it created a bunch of empty directories

```txt
drwx------ 2 root   root   4096 Feb 12 23:48 .criu.temp-aa-policy.8uhTbO
drwx------ 2 root   root   4096 Feb 12 23:51 .criu.temp-aa-policy.90Vqt9
drwx------ 2 root   root   4096 Feb 12 23:29 .criu.temp-aa-policy.9an3IS
drwx------ 2 root   root   4096 Feb 12 23:51 .criu.temp-aa-policy.CBz1ud
drwx------ 2 root   root   4096 Feb 12 23:39 .criu.temp-aa-policy.eA0Kj6
drwx------ 2 root   root   4096 Feb 12 23:34 .criu.temp-aa-policy.GD04gM
drwx------ 2 root   root   4096 Feb 12 23:38 .criu.temp-aa-policy.ItnOKf
drwx------ 2 root   root   4096 Feb 12 23:57 .criu.temp-aa-policy.NuRSjL
drwx------ 2 root   root   4096 Feb 12 23:57 .criu.temp-aa-policy.nUX8Kq
drwx------ 2 root   root   4096 Feb 12 23:36 .criu.temp-aa-policy.PGi24L
drwx------ 2 root   root   4096 Feb 12 23:35 .criu.temp-aa-policy.QNuwGp
drwx------ 2 root   root   4096 Feb 12 23:28 .criu.temp-aa-policy.RyvBPt
drwx------ 2 root   root   4096 Feb 12 23:41 .criu.temp-aa-policy.TXQpQv
drwx------ 2 root   root   4096 Feb 12 23:41 .criu.temp-aa-policy.URYvi0
drwx------ 2 root   root   4096 Feb 12 23:34 .criu.temp-aa-policy.VJixh8
drwx------ 2 root   root   4096 Feb 12 23:48 .criu.temp-aa-policy.whT8gi
```
delete the directories after aborting

Signed-off-by: YarBor <yarbor.ww@gmail.com>
@YarBor YarBor mentioned this issue Feb 26, 2024
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@benibela @Snorch