fs_locations: replica information from /etc/exports reaches kernel only sporadically

[Andre van Hoorn]

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Fredric Isaman schrieb:
> On Thu, 24 Aug 2006, Andre van Hoorn wrote:
> 
>> Hi,
>>
>>
>> Since the current CITI NFSv4 patches support the FS_LOCATIONS attribute
>> I'd like to use the existing functionality for my replication application.
>>
>> Unfortunately, I couldn't retrace the way (and when) the information
>> flows from /etc/exports via exportfs and mountd into the nfsd kernel module:
>>
>> I specified the following export with replicas in /etc/exports:
>> /export  *(rw,fsid=0,insecure,no_subtree_check,replicas="/@192.168.0.1")
>>
>> The replica information is parsed by exportfs but doesn't reach the
>> kernel in /fs/nfsd/export.c:svc_export_parse(struct cache_detail *cd,
>> char *mesg, int mlen) where I expect the string 'mesg' to end with
>> "fsloc 1 192.168.0.1 / 0" each time .
>>
> 
> Try the following patch:
> 
> --- nfs-utils-1.0.10/utils/mountd/cache.c.orig	2006-08-24 08:13:44.244404000 -0400
> +++ nfs-utils-1.0.10/utils/mountd/cache.c	2006-08-24 08:14:16.078972000 -0400
> @@ -395,6 +395,7 @@ void cache_export_ent(char *domain, stru
>  	qword_printint(f, exp->e_anonuid);
>  	qword_printint(f, exp->e_anongid);
>  	qword_printint(f, exp->e_fsid);
> +	write_fsloc(f, exp, exp->e_path);
>  	qword_eol(f);
> 
>  	fclose(f);

That solved the problem on the server side! The replica information is
now always passed to the kernel. And the FS_LOCATIONS are listed in the
request for supported attributes (as far as there's at least one).

I didn't test if the replica information is passed to the client because
by now it seems it never asks for the attribute. I will check.

Are the latest patches for the fs locations always posted on the list or
is there any other source to get the most recent development/discussion
status?


Thanks,

André






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