Re: Problems using scsi_id with udevstart

[Patrick Mansfield <patmans@us.ibm.com>]

I don't know much about how udevstart operates. Anyway ...

On Tue, Oct 05, 2004 at 05:33:46PM -0600, Andrew Patterson wrote:
> Hi,
> 
> I added the following udev rule to make human-readable device file names
> for my SCSI disks:
> 
> BUS="scsi", KERNEL="sd*", PROGRAM="scsi_id", NAME="scsi_disks/%c-%b",
> SYMLINK="%k"

Interesting ... I was thinking of the opposite type of rule to match some
of the SUSE device naming, like:

BUS="scsi", KERNEL="sd*", PROGRAM="scsi_id", NAME="%k" SYMLINK="scsi_disks/%c-%b", 

> When I run udevstart, I get the following errors in the logfile:
> 
> Oct  5 17:25:17 natasha udevstart: PROGRAM execution of 'scsi_id' failed
> Oct  5 17:25:17 natasha udevstart: creating device node '/dev/sdy2'
> Oct  5 17:25:17 natasha udevstart: PROGRAM execution of 'scsi_id' failed
> Oct  5 17:25:17 natasha udevstart: creating device node '/dev/sdz'
> 
> scsi_id is failing because no parameters are being passed to it, and I
> think DEVPATH is also not being set appropriately.  Here is debug
> output:
> 
> get_sysfs_device: device 2:0:0:0 is registered with bus 'scsi'
> namedev_name_device: sysfs_device-
> >path='/sys/devices/pci0000:20/0000:20:01.0/host2/2:0:0:0'
> namedev_name_device: sysfs_device->bus_id='2:0:0:0'
> namedev_name_device: sysfs_device->bus='scsi'
> wait_for_device_to_initialize: looking for file 'vendor' on bus 'scsi'
> namedev_name_device: class_dev->name = 'sda'
> namedev_name_device: udev->kernel_name = 'sda'
> namedev_name_device: kernel_number=''
> namedev_name_device: process rule
> match_rule: check for BUS dev->bus='scsi' sysfs_device->bus='scsi'
> match_rule: BUS matches
> match_rule: check PROGRAM
> execute_program: 
> 
> execute_program: result len 256 too short
> execute_program: result is ' matching

The above indicates udev thinks the output of scsi_id is too long.

[elm3b79 udev-bk]$ grep NAME_SIZE *.[hc] udev.h | grep define
logging.h:#define LOGNAME_SIZE                  42
udev.h:#define NAME_SIZE                        256
udev.h:#define NAME_SIZE                        256

Greg or Kay, can you verify the above? Should we / can we increase
NAME_SIZE?

Andrew - what does running scsi_id from the command line return for the
device? Like this:
	
	scsi_id -s /block/sdN

-- Patrick Mansfield


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