[systemd-devel] Question about encrypted devices.

[Lennart Poettering]

On Tue, 19.03.13 11:55, Mathieu Cassard (cassard.mathieu at gmail.com) wrote:

> Hello,
> I'm a quit new user of systemd. Hope this is the right place to ask
> for help...
> 
> I am trying to mount an encrypted disk at boot.
> I am working with a customized distribution & kernel (using ptxdist).
> 
> In my fstab :
> /dev/mapper/c1  /opt    ext4    defaults        0 0
> 
> In my crypttab
> c1    /dev/opt  none    luks

This looks like breakage in your LVM/DM userspace. What distro is this?
Most likely LVM/DM wasn't built with udev enabled.

> 
> And during boot the system timeout waiting for dev-mapper-c1.device :
> 
> [...]
> Jan 01 00:00:09 TestBox systemd[1]: Mounted /var/log directory.
> Jan 01 00:00:11 TestBox systemd-cryptsetup[93]: Set cipher aes, mode xts-plain
> Jan 01 00:00:13 TestBox systemd[1]: Started Cryptography Setup for c1.
> Jan 01 00:01:35 TestBox systemd[1]: Job dev-mapper-c1.device/start timed out.
> Jan 01 00:01:35 TestBox systemd[1]: Timed out waiting for device dev-mapper-c1
> Jan 01 00:01:35 TestBox systemd-journal[46]: Forwarding to syslog missed 34 me
> Jan 01 00:01:35 TestBox systemd[1]: Dependency failed for /opt.
> [...]
> 
> If I comment c1 in the fstab, the sytem boot ok, /dev/mapper/c1 is
> present and I can manually do :
> mount /dev/mapper/c1 /opt
> [   84.052445] EXT4-fs (dm-0): recovery complete
> [   84.058232] EXT4-fs (dm-0): mounted filesystem with ordered data
> mode. Opts: (null)
> 
> udevadm info  /dev/mapper/c1
> P: /devices/virtual/block/dm-0
> N: dm-0
> E: DEVNAME=/dev/dm-0
> E: DEVPATH=/devices/virtual/block/dm-0
> E: DEVTYPE=disk
> E: MAJOR=254
> E: MINOR=0
> E: SUBSYSTEM=block
> E: TAGS=:systemd:
> E: UDEV_LOG=3
> E: USEC_INITIALIZED=45372516
> 
> Any idea why systemd keep waiting for /dev/mapper/c1 ?  Or where to
> start looking ?

Well, the udevadm output above shows that the name "c1" is not attached
to the udev device, which means systemd won't pick it up.

But anyway, this is a DM issue, please contact the DM folks.

Lennart

-- 
Lennart Poettering - Red Hat, Inc.