path_id confusion

path_id confusion

[Andrey Borzenkov]

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In 087 it is apparently broken:

{pts/1}% git reset --hard 087
{pts/1}% DEVPATH=/block/hdc sh ./extras/path_id
sed: невозможно прочитать /var/lib/pcmcia/stab: No such file or directory
ID_PATH=pcmcia--ide-0:0


In current git it is better:

{pts/1}% git checkout master
{pts/1}% DEVPATH=/block/hdc ./extras/path_id
ID_PATH=ide-0:0

Still apparently at some point it was even better:

{pts/1}% cat /etc/udev/rules.d/51-block_config.rules
# udev persistent rules for block subsystem
# Generated by Mandriva udev rules
# See /etc/udev/rules.d/52-create_persistent.rules

SUBSYSTEM="block", ACTION="add", ENV{ID_PATH}="pci-0000:00:04.0-ide-1:0", 
SYMLINK+="cdrom cdrom0 dvd dvd0", ENV{MDV_CONFIGURED}="yes"

Well, the latter looks like the right one; was change intentional (or possibly 
at some point path_id was customized in Mandriva)?

- -andrey
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Re: path_id confusion

[Olivier Blin]

Andrey Borzenkov <arvidjaar@mail.ru> writes:

> SUBSYSTEM="block", ACTION="add", ENV{ID_PATH}="pci-0000:00:04.0-ide-1:0", 
> SYMLINK+="cdrom cdrom0 dvd dvd0", ENV{MDV_CONFIGURED}="yes"
>
> Well, the latter looks like the right one; was change intentional (or possibly 
> at some point path_id was customized in Mandriva)?

Nope, we didn't modify it between the releases you mention, we just
upgraded to udev-087.

-- 
Olivier Blin - Mandriva


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Re: path_id confusion

[Andrey Borzenkov]

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On Friday 24 March 2006 14:12, Olivier Blin wrote:
> Andrey Borzenkov <arvidjaar@mail.ru> writes:
> > SUBSYSTEM="block", ACTION="add",
> > ENV{ID_PATH}="pci-0000:00:04.0-ide-1:0", SYMLINK+="cdrom cdrom0 dvd
> > dvd0", ENV{MDV_CONFIGURED}="yes"
> >
> > Well, the latter looks like the right one; was change intentional (or
> > possibly at some point path_id was customized in Mandriva)?
>
> Nope, we didn't modify it between the releases you mention, we just
> upgraded to udev-087.

For the record - it is not (directly) udev bug; it is a problem of resuming 
from STR - hdc loses its "position":

{pts/1}% LC_ALL=C ll /sys/bus/ide/devices
total 0
lrwxrwxrwx  1 root root 0 Mar 24 19:21 0.0 
- -> ../../../devices/pci0000:00/0000:00:04.0/ide0/0.0/
lrwxrwxrwx  1 root root 0 Mar 24 19:21 1.0 -> ../../../devices/ide1/1.0/

here first channel is OK, second one is hdc and parent is forgotten. 
Apparently it is something introduced in 2.6.16.

- -andrey
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