Re: [linux-lvm] Problem with vgscan/ vgcfgrestore

[AJ Lewis <lewis@sistina.com>]

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On Tue, Mar 13, 2001 at 08:41:02AM +0100, Luca Berra wrote:
> i have a couple of ideas, but no time to code (sorry)
> 1) using realpath in the tools to solve issue 2

This should be done no matter what.  I can't think of any good reason not to
have the tools follow sym-links.

> 2) checking if the devices mentioned in /proc/partition do really exist, else
>   switch the cache to "scan the dev directory mode"

I believe this is the way it works at present

> 	but better than the above 
> 3) add another structure to the cache which contains aliases to the device
>  we have in the cache, aliases are added dynamically when found on the command
>  line or in the VGDA of a PV. We use 
> 	alias[c].name=possible alias;
> 	lstat(possible alias, &statbuf)
> 	if (S_ISLNK(statbuf.st_mode)) {
> 		alias[c].target=lvm_dir_cache_find(realpath(possible alias));
> 		if !(alias[c].target) stat(realptah(possible alias), &statbuf)
> 	}
> 	if (S_ISBLK(statbuf.st_mode)) {
> 		alias[c].target=lvm_dir_cache_find_dev(statbuf.st_dev>>8,statbuf.st_mode&((1<<8)-1));
> 		/* the above function has to be written*/
> 	}
> 	if (!alias[c].target) complain(loudly);
> 	c++;
> 
>   then we modify lvm_dir_cache_find to loop also on alias[], before it starts searching th
>   cache.

This looks interesting...and could possibly help a lot as well.

Regards,
-- 
AJ Lewis
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