Adds dm-crypt support

[vasyl-purchel]

Adds crypt target support in kernel for device mapper
Adds XTS support, AES cipher algorithms and User-space interface for
symmetric key cipher algorithms in kernel

This change is needed to make it possible to encrypt rbd images in ceph-csi with LUKS

Signed-off-by: Vasyl Purchel [email protected]
Signed-off-by: Andrea Baglioni [email protected]

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[k8s-ci-robot]

Hi @vasyl-purchel. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[minikube-bot]

Can one of the admins verify this patch?

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: vasyl-purchel
To complete the pull request process, please assign tstromberg
You can assign the PR to them by writing /assign @tstromberg in a comment when ready.

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[codecov-io]

Codecov Report

Merging #5739 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #5739   +/-   ##
=======================================
  Coverage   37.83%   37.83%           
=======================================
  Files         106      106           
  Lines        7773     7773           
=======================================
  Hits         2941     2941           
  Misses       4452     4452           
  Partials      380      380

[medyagh]

Thanks for creating this PR ! would you mind giving some examples that this PR would be useful ?
and also an example that the current minikube does not support it ? myabe be output and logs?

[vasyl-purchel]

With the change I have created containers from https://github.com/ceph/ceph-csi/pull/697/files and then inside csi-rbdplugin container (kubectl exec -it csi-rbdplugin-hn2bc -c csi-rbdplugin bash) I have created an rbd image in ceph, mapped it and then was able to encrypt it with LUKS:

[root@minikube /]# echo 'hellopassphrase' | cryptsetup luksFormat --hash sha256 /dev/rbd0 -d /dev/stdin
[root@minikube /]# echo $?
0
[root@minikube /]# lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
rbd0   251:0    0     1G  0 disk
sr0     11:0    1 143.4M  0 rom
sda      8:0    0  19.5G  0 disk
`-sda1   8:1    0  19.5G  0 part /var/lib/kubelet/plugins
[root@minikube /]# echo 'hellopassphrase' | cryptsetup luksOpen /dev/rbd0 luks-encr-test -d /dev/stdin
[root@minikube /]# lsblk
NAME             MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
rbd0             251:0    0     1G  0 disk
`-luks-encr-test 252:0    0  1020M  0 crypt
sr0               11:0    1 143.4M  0 rom
sda                8:0    0  19.5G  0 disk
`-sda1             8:1    0  19.5G  0 part  /var/lib/kubelet/plugins

While with the latest version I was getting:

[root@minikube /]# echo 'hellopassphrase' | cryptsetup -q luksFormat --hash sha256 /dev/rbd0 -d /dev/stdin          
device-mapper: reload ioctl on   failed: Invalid argument
Failed to setup dm-crypt key mapping for device /dev/rbd0.
Check that kernel supports aes-xts-plain64 cipher (check syslog for more info).

Also from cryptsetup documentation:

Before using cryptsetup, always make sure the dm_crypt kernel module is loaded.

without change you get:

[root@minikube /]# modprobe dm_crypt
modprobe: FATAL: Module dm_crypt not found.

after the change:

[root@minikube /]# modprobe dm-crypt
[root@minikube /]# echo $?
0

[RA489]

/check-cla

[RA489]

@vasyl-purchel Do you have any issue while signing the cla?

[vasyl-purchel]

/check-cla

[vasyl-purchel]

/check-cla

[tstromberg]

/ok-to-test

[tstromberg]

Diff was difficult to parse at first, but change looks good. Thank you!