[Pkg-utopia-maintainers] Bug#495485: More info

Tue Nov 11 18:13:17 UTC 2008

Any update on this???

Initially I wasn't very sure where exactly the problem lied. Especially 
because there were many parties involved.

But todays investigation can confirm that it must be a problem with hal. 
Hal is not adding non-partitioned encrypted devices into its database.

=====
From KDE Bug: 113629

In fact, the problem seems to be with HAL. My initial suspicion was that 
udev
might not be generating the device entry/label correctly, but that doesn't 
seem
to be the reason.

Here,

In Problematic case:
Nov 11 23:10:38 learner udevd-event[5814]: udev_node_update_symlinks: 
update
symlink 'disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e' of 
'/block/dm-2'
Nov 11 23:10:38 learner udevd-event[5814]: udev_db_get_devices_by_name: 
found
index directory
'/dev/.udev/names/disk\x2fby-uuid\x2fbc1026e2-1393-49e7-a6f6-72c01e93b47e'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: found 1 devices 
with
name 'disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: found 
'/block/dm-2' for
'disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: compare (our own)
priority of '/block/dm-2' -100 >= 0
Nov 11 23:10:38 learner udevd-event[5814]: update_link:
'disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e' with target 'dm-2' has 
the
highest priority -100, create it
Nov 11 23:10:38 learner udevd-event[5814]: node_symlink: found existing 
symlink
'/dev/disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e'
Nov 11 23:10:38 learner udevd-event[5814]: node_symlink: preserve already
existing symlink '/dev/disk/by-uuid/bc1026e2-1393-49e7-a6f6-72c01e93b47e' 
to
'../../dm-2'
Nov 11 23:10:38 learner udevd-event[5814]: udev_node_update_symlinks: 
update
symlink 'disk/by-label/USB_SEAGATE' of '/block/dm-2'
Nov 11 23:10:38 learner udevd-event[5814]: udev_db_get_devices_by_name: 
found
index directory '/dev/.udev/names/disk\x2fby-label\x2fUSB_SEAGATE'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: found 1 devices 
with
name 'disk/by-label/USB_SEAGATE'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: found 
'/block/dm-2' for
'disk/by-label/USB_SEAGATE'
Nov 11 23:10:38 learner udevd-event[5814]: update_link: compare (our own)
priority of '/block/dm-2' -100 >= 0
Nov 11 23:10:38 learner udevd-event[5814]: update_link:
'disk/by-label/USB_SEAGATE' with target 'dm-2' has the highest priority 
-100,
create it
Nov 11 23:10:38 learner udevd-event[5814]: node_symlink: found existing 
symlink
'/dev/disk/by-label/USB_SEAGATE'
Nov 11 23:10:38 learner udevd-event[5814]: node_symlink: preserve already
existing symlink '/dev/disk/by-label/USB_SEAGATE' to '../../dm-2'
Nov 11 23:10:38 learner udevd-event[5814]: pass_env_to_socket: passed 751 
bytes
to socket '/org/freedesktop/hal/udev_event',
Nov 11 23:10:38 learner udevd-event[5814]: pass_env_to_socket: passed -1 
bytes
to socket '@/org/kernel/udev/monitor',
Nov 11 23:10:38 learner udevd-event[5814]: udev_event_run: seq 1435 
finished
with 0
Nov 11 23:10:38 learner udevd[1240]: udev_done: seq 1435, pid [5814] exit 
with
0, 0 seconds old

udev did its job. it exited cleanly.

Now the non-problematic case:
Nov 11 23:15:54 learner udevd-event[6064]: udev_node_update_symlinks: 
update
symlink 'disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e' of 
'/block/dm-3'
Nov 11 23:15:54 learner udevd-event[6064]: udev_db_get_devices_by_name: 
found
index directory
'/dev/.udev/names/disk\x2fby-uuid\x2fb1d29a26-9d95-4aa4-8d9d-9498a874312e'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: found 1 devices 
with
name 'disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: found 
'/block/dm-3' for
'disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: compare (our own)
priority of '/block/dm-3' -100 >= 0
Nov 11 23:15:54 learner udevd-event[6064]: update_link:
'disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e' with target 'dm-3' has 
the
highest priority -100, create it
Nov 11 23:15:54 learner udevd-event[6064]: node_symlink: found existing 
symlink
'/dev/disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e'
Nov 11 23:15:54 learner udevd-event[6064]: node_symlink: preserve already
existing symlink '/dev/disk/by-uuid/b1d29a26-9d95-4aa4-8d9d-9498a874312e' 
to
'../../dm-3'
Nov 11 23:15:54 learner udevd-event[6064]: udev_node_update_symlinks: 
update
symlink 'disk/by-label/USBDISK' of '/block/dm-3'
Nov 11 23:15:54 learner udevd-event[6064]: udev_db_get_devices_by_name: 
found
index directory '/dev/.udev/names/disk\x2fby-label\x2fUSBDISK'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: found 1 devices 
with
name 'disk/by-label/USBDISK'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: found 
'/block/dm-3' for
'disk/by-label/USBDISK'
Nov 11 23:15:54 learner udevd-event[6064]: update_link: compare (our own)
priority of '/block/dm-3' -100 >= 0
Nov 11 23:15:54 learner udevd-event[6064]: update_link: 'disk/by-
label/USBDISK'
with target 'dm-3' has the highest priority -100, create it
Nov 11 23:15:54 learner udevd-event[6064]: node_symlink: found existing 
symlink
'/dev/disk/by-label/USBDISK'
Nov 11 23:15:54 learner udevd-event[6064]: node_symlink: preserve already
existing symlink '/dev/disk/by-label/USBDISK' to '../../dm-3'
Nov 11 23:15:54 learner udevd-event[6064]: pass_env_to_socket: passed 735 
bytes
to socket '/org/freedesktop/hal/udev_event',
Nov 11 23:15:54 learner udevd-event[6064]: pass_env_to_socket: passed -1 
bytes
to socket '@/org/kernel/udev/monitor',
Nov 11 23:15:54 learner udevd-event[6064]: udev_event_run: seq 1459 
finished
with 0
Nov 11 23:15:54 learner udevd[1240]: udev_done: seq 1459, pid [6064] exit 
with
0, 0 seconds old
Nov 11 23:15:54 learner NetworkManager: <debug> [1226425554.923853]
nm_hal_device_added(): New device added (hal udi is
'/org/freedesktop/Hal/devices/volume_uuid_b1d29a26_9d95_4aa4_8d9d_9498a874312e').

Here too udev did its job. But here also the device got added to hal.
======

Another look:

rrs at learner:/sys/block$ tree dm-2/
dm-2/                             
|-- bdi -> ../../class/bdi/254:2  
|-- capability                    
|-- dev                           
|-- holders                       
|-- power                         
|   `-- wakeup                    
|-- range                         
|-- removable                     
|-- size                          
|-- slaves
|   `-- sdb -> ../../sdb
|-- stat
|-- subsystem -> ../../block
`-- uevent

6 directories, 8 files
rrs at learner:/sys/block$ tree dm-3/
dm-3/
|-- bdi -> ../../class/bdi/254:3
|-- capability
|-- dev
|-- holders
|-- power
|   `-- wakeup
|-- range
|-- removable
|-- size
|-- slaves
|   `-- sdc2 -> ../../sdc/sdc2
|-- stat
|-- subsystem -> ../../block
`-- uevent

You see here that dm-3 is a partitioned encrypted device and dm-2 is a 
non-partitioned encrypted device.

If I query the hal database, it only know about dm-3. There is no record 
about dm-2

rrs at learner:/sys/block$ sudo lshal | grep -i dm-2
rrs at learner:/sys/block$ sudo lshal | grep -i dm-3
  block.device = '/dev/dm-3'  (string)
  linux.sysfs_path = '/sys/block/dm-3'  (string)

This makes me conclude that it is a problem with hal

Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."

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