[pkg-cryptsetup-devel] Bug#820888: cryptsetup: initramfs cryptroot zfs support

[François Scala]

Package: cryptsetup
Version: 2:1.6.6-5
Severity: normal

Dear Maintainer,

While working on a Debian installation based on ZFS root with LUKS 
encryption (see https://github.com/arcenik/debian-zfs-root) I've 
encountered some problem with the initramfs cryptroot script.

The LUKS is properly opened and the contained LVM volume properly detected.

It then try to detect the filesystem type from the root kernel parameter 
using blkid. But this fail because the root parameter value is not 
recognised by blkid

   root=ZFS=rpool/ROOT/debian-1

I think that ${cmdline_root} should be used for NEWROOT only if it begin 
with '/dev' or at least '/' and use '/dev/mapper/${cryptlvm}' if not.

Regards.

François.

-- Package-specific info:
-- /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.16.0-4-amd64 root=ZFS=rpool/ROOT/debian-1 ro 
boot=zfs cryptops=source=/dev/sda2,target=cryptroot,lvm=vg_sys-lv_zroot

-- /etc/crypttab
# no crypttab

-- /etc/fstab
LABEL=BOOT    /boot    ext4    noatime    0    1
LABEL=SWAP    none    swap    defaults    0    0

-- lsmod
Module                  Size  Used by
fuse                   83350  0
btrfs                 863629  0
xor                    21040  1 btrfs
raid6_pq               95238  1 btrfs
ufs                    73443  0
qnx4                   13036  0
hfsplus               101391  0
hfs                    53845  0
minix                  31387  0
ntfs                  194605  0
vfat                   17135  0
msdos                  17046  0
fat                    61986  2 vfat,msdos
jfs                   172859  0
xfs                   779930  0
libcrc32c              12426  1 xfs
crc32c_generic         12656  0
ext4                  473801  1
crc16                  12343  1 ext4
mbcache                17171  1 ext4
jbd2                   82514  1 ext4
zfs                  2614234  7
zunicode              328546  1 zfs
zcommon                39960  1 zfs
znvpair                58712  2 zfs,zcommon
spl                    69541  3 zfs,zcommon,znvpair
zavl                   13071  1 zfs
dm_crypt               22595  1
dm_mod                 89405  8 dm_crypt
xts                    12679  1
gf128mul               12970  1 xts
algif_skcipher         17349  0
af_alg                 13034  1 algif_skcipher
nfsd                  263032  2
auth_rpcgss            51211  1 nfsd
oid_registry           12419  1 auth_rpcgss
nfs_acl                12511  1 nfsd
nfs                   188136  0
lockd                  83389  2 nfs,nfsd
fscache                45542  1 nfs
sunrpc                237402  6 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
ppdev                  16782  0
snd_intel8x0           34948  0
joydev                 17063  0
snd_ac97_codec        118711  1 snd_intel8x0
pcspkr                 12595  0
evdev                  17445  3
snd_pcm                88662  2 snd_ac97_codec,snd_intel8x0
serio_raw              12849  0
snd_timer              26614  1 snd_pcm
snd                    65244  4 
snd_ac97_codec,snd_intel8x0,snd_timer,snd_pcm
battery                13356  0
soundcore              13026  1 snd
parport_pc             26300  0
parport                35749  2 ppdev,parport_pc
processor              28221  0
video                  18096  0
button                 12944  0
ac                     12715  0
ac97_bus               12510  1 snd_ac97_codec
thermal_sys            27642  2 video,processor
i2c_piix4              20864  0
i2c_core               46012  1 i2c_piix4
autofs4                35529  2
squashfs               43856  1
loop                   26605  3
aufs                  199535  390
nls_utf8               12456  4
isofs                  38965  1
hid_generic            12393  0
usbhid                 44460  0
hid                   102264  2 hid_generic,usbhid
sd_mod                 44356  3
crc_t10dif             12431  1 sd_mod
sg                     29973  0
sr_mod                 21903  1
cdrom                  47424  1 sr_mod
crct10dif_generic      12581  1
crct10dif_common       12356  2 crct10dif_generic,crc_t10dif
ata_generic            12490  0
ohci_pci               12808  0
crc32c_intel           21809  2
ata_piix               33592  1
ahci                   33334  2
libahci                27158  1 ahci
psmouse                99249  0
ohci_hcd               42982  1 ohci_pci
ehci_pci               12512  0
ehci_hcd               69837  1 ehci_pci
libata                177508  4 ahci,libahci,ata_generic,ata_piix
scsi_mod              191405  4 sg,libata,sd_mod,sr_mod
usbcore               195468  5 ohci_hcd,ohci_pci,ehci_hcd,ehci_pci,usbhid
usb_common             12440  1 usbcore
e1000                 122545  0


-- System Information:
Debian Release: 8.4
   APT prefers stable
   APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.16.0-4-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd

Versions of packages cryptsetup depends on:
ii  cryptsetup-bin         2:1.6.6-5
ii  debconf [debconf-2.0]  1.5.56
ii  dmsetup                2:1.02.90-2.2
ii  libc6                  2.19-18+deb8u4

Versions of packages cryptsetup recommends:
ii  busybox                                 1:1.22.0-9+deb8u1
ii  console-setup                           1.123
ii  initramfs-tools [linux-initramfs-tool]  0.120+deb8u1
ii  kbd                                     1.15.5-2

Versions of packages cryptsetup suggests:
pn  dosfstools              <none>
pn  keyutils                <none>
ii  liblocale-gettext-perl  1.05-8+b1

-- debconf information:
   cryptsetup/prerm_active_mappings: true