[PATCH][RESEND2] nfs-utils-1.0.6 permission denied on mount after 'exportfs -u'

[PATCH][RESEND2] nfs-utils-1.0.6 permission denied on mount after 'exportfs -u'

[Bruce Allan]

Neil,

Have you had a chance to look at this yet? [I assume not since it is not in the latest nfs-utils-1.0.7-pre1]

Thanks,
Bruce Allan

-----Forwarded Message-----
From: Bruce Allan <bwa@us.ibm.com>
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: nfs@lists.sf.net
Subject: [PATCH] nfs-utils-1.0.6 permission denied on mount after 'exportfs -u'
Date: Thu, 26 Aug 2004 15:50:49 -0700

Hi Neil,

There is a problem with rpc.mountd after doing an 'exportfs -u' such as
in the following:

[server]# exportfs *:/foo
[client]# mount server:/foo /mnt
[client]# umount /mnt
[server]# exportfs -u *:/foo
[server]# exportfs client:/foo
[client]# mount server:/foo /mnt
mount: server:/foo failed, reason given by server: Permission denied

In the above situation, the static my_client doesn't get cleared as a
result of the unexporting.  Since the client address is the same in both
mount requests it won't perform a new lookup and will continue to use
the previous hostname, i.e. "*".  Unfortunately, the list of clients in
the exportlist no longer contains "*" for a hostname (only contains the
hostname "client") and will return a NULL pointer with a not_exported
error.

--- nfs-utils-1.0.6/utils/mountd/auth.c	2003-07-14 15:10:12.000000000 -0700
+++ nfs-utils-1.0.6-auth.c/utils/mountd/auth.c	2004-08-26 14:52:40.000000000 -0700
@@ -30,6 +30,8 @@ enum auth_error
 
 static void		auth_fixpath(char *path);
 static char	*export_file = NULL;
+static nfs_export my_exp;
+static nfs_client my_client;
 
 extern int new_cache;
 
@@ -55,6 +57,7 @@ auth_reload()
 	last_modified = stb.st_mtime;
 
 	export_freeall();
+	memset(&my_client, 0, sizeof(nfs_client));
 	// export_read(export_file);
 	xtab_export_read();
 
@@ -69,8 +72,6 @@ auth_authenticate_internal(char *what, s
 	nfs_export		*exp;
 
 	if (new_cache) {
-		static nfs_export my_exp;
-		static nfs_client my_client;
 		int i;
 		/* return static nfs_export with details filled in */
 		if (my_client.m_naddr != 1 ||


Regards,
---
Bruce Allan  <bwa@us.ibm.com>
Software Engineer, Linux Technology Center
IBM Corporation, Beaverton OR
503-578-4187   IBM Tie-line 775-4187



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Re: [PATCH][RESEND2] nfs-utils-1.0.6 permission denied on mount after 'exportfs -u'

[Neil Brown]

On Friday December 3, bwa@us.ibm.com wrote:
> Neil,
> 
> Have you had a chance to look at this yet? [I assume not since it is
> not in the latest nfs-utils-1.0.7-pre1]

Thanks for the reminder (and your patience).

Yes, it looks fine and I have committed it to CVS.

Thanks,
NeilBrown


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Re: [PATCH][RESEND2] nfs-utils-1.0.6 permission denied on mount after 'exportfs -u'

[Steve Dickson]

Bruce Allan wrote:

>Neil,
>
>Have you had a chance to look at this yet? [I assume not since it is not in the latest nfs-utils-1.0.7-pre1]
>  
>
I can verify that this patch does seem to work...

steved.


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