Verified with systemd/237-3ubuntu10.31:
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ sudo vi /etc/crypttab
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ sudo systemctl daemon-reload
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ sudo service
systemd-cryptsetup@vdb_crypt start
Please enter passphrase for disk vdb_crypt! ****
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ cat /etc/crypttab
vdb_crypt /dev/vdb none luks,sector-size=4096
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ sudo service
systemd-cryptsetup@vdb_crypt status
● systemd-cryptsetup@vdb_crypt.service - Cryptography Setup for vdb_crypt
Loaded: loaded (/etc/crypttab; generated)
Active: active (exited) since Tue 2019-10-08 21:05:11 CEST; 13s ago
Docs: man:crypttab(5)
man:systemd-cryptsetup-generator(8)
man:systemd-cryptsetup@.service(8)
Process: 1999 ExecStart=/lib/systemd/systemd-cryptsetup attach vdb_crypt
/dev/vdb none luks,sector-size=4096 (cod
Main PID: 1999 (code=exited, status=0/SUCCESS)
okt 08 21:05:06 ubuntu-Standard-PC-i440FX-PIIX-1996 systemd[1]: Starting
Cryptography Setup for vdb_crypt...
okt 08 21:05:09 ubuntu-Standard-PC-i440FX-PIIX-1996 systemd-cryptsetup[1999]:
Set cipher aes, mode xts-plain64, key
okt 08 21:05:11 ubuntu-Standard-PC-i440FX-PIIX-1996 systemd[1]: Started
Cryptography Setup for vdb_crypt.
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$ sudo fdisk /dev/mapper/vdb_crypt
Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x313e0336.
Command (m for help): p
Disk /dev/mapper/vdb_crypt: 5 GiB, 5366611968 bytes, 1310208 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x313e0336
Command (m for help): q
ubuntu@ubuntu-Standard-PC-i440FX-PIIX-1996:~$
** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1776626
Title:
[18.10 FEAT] Support 4k sectors for fast clear key dm-crypt - crypttab
part
Status in Ubuntu on IBM z Systems:
Fix Released
Status in cryptsetup package in Ubuntu:
Fix Released
Status in systemd package in Ubuntu:
Fix Released
Status in cryptsetup source package in Bionic:
Won't Fix
Status in systemd source package in Bionic:
Fix Committed
Bug description:
[Impact]
* cryptsetup in bionic supports creating luks volumes with a non-
standard sector-size option, and thus this option also needs to be
used when activating the LUKS volumes. Add sector-size= option support
to /etc/crypttab.
[Test Case]
* Create a plain LUKS volume with sector-size 4096
* Specify sector-size=4096 option in /etc/crypttab
* reload systemd, start systemd-cryptsetup@.service for that volume
* check the journal, to ensure that `sector-size` option was recognized and
is active. (i.e. there is not error messages about unrecognized option
`sector-size` from systemd-cryptsetup)
[Regression Potential]
* This is an optional argument, not used by default. Currently custom
sector-size crypttab does not work correctly, and thus cannot regress.
[Other Info]
* Original bug report
Support fast clear key dm-crypt with 4k support
Extend /etc/crypttab to enable 4k sector support in plain mode
The proposed enhancements are posted on github, see
https://github.com/systemd/systemd/issues/8881
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