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RE: [linux-lvm] Snapshot creating problem

It's odd, I pulled down the 'device-mapper-latest.tgz' from the sistina ftp site just last week, but the code in my dm-snapshot.c is different that this:
if (persistent != 'P' && persistent != 'N') {
        ti->error = "Persistent flag is not P or N"

Mine looks like

if ((*persistent & 0x5f) != 'P' && (*persistent & 0x5f) != 'N') {

Can you please point to to the 'best' patch, and I'll just start all over.

Thanks for all of your help,

Christopher Barry
Manager of Information Systems
InfiniCon Systems

-----Original Message-----
From: Alasdair G Kergon [mailto:agk uk sistina com]
Sent: Monday, March 17, 2003 2:23 PM
To: linux-lvm sistina com
Subject: Re: [linux-lvm] Snapshot creating problem

On Mon, Mar 17, 2003 at 02:00:36PM -0500, Barry, Christopher wrote:
> Mar 17 12:47:16 debian kernel: device-mapper: internal error adding target to table

That's a (known) misleading error message - it's no longer necessarily
an error internal to the kernel, but can be caused by invalid 
parameters being supplied to a device-mapper target.

> To give you more info I need some instructions on how to get you the debug output.
See previous messages on this list, WHATS_NEW file, example.conf, 
lvm.conf man page etc.

e.g. Use a config file containing:

  log {

And remember to say exactly which kernel patches you applied.
[The device-mapper version number is not sufficient because 
people have produced patches that don't update it.]

For example, a set of patches before Xmas had a bug that is 
known to stop all snapshots from working.
To see if you have that logic bug, check dm-snapshot.c
a little after line 400 - it should have:
  if (persistent != 'P' && persistent != 'N') {
        ti->error = "Persistent flag is not P or N";

agk uk sistina com

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