NFS Server problem (kernel > 2.6.5 ?)

NFS Server problem (kernel > 2.6.5 ?)

[mrg]

Hi,

I've had a server running FC2 for a while. I recently upgraded the kernel to
2.6.8.1, and then the NFS server stopped working.
I only get a 'Permission denied' on the client side, but the server writes a
'rpc.mountd: authenticated mount request from ...' in the message log.
I've tried al kinds of kernel options without any luck. I've also tried
2.6.8, 2.6.9-rc4 and 2.6.9, but the only kernel that works is the
2.6.5-1.358 which comes with FC2. However, the client can run both FC2 stock
kernel and 2.6.9 and still connect to the server (when run with kernel
2.6.5-1.358).

Some config info:
/etc/exports:
    /rootfs 192.168.1.0/24(rw,sync,no_root_squash)

/etc/hosts.deny is empty, /etc/hosts.allow: ALL:ALL


Does anybody know what the problem is ?

TIA,
    Geir Rastad



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Re: NFS Server problem (kernel > 2.6.5 ?)

[Jason Holmes]

mrg wrote:
> Hi,
> 
> I've had a server running FC2 for a while. I recently upgraded the kernel to
> 2.6.8.1, and then the NFS server stopped working.
> I only get a 'Permission denied' on the client side, but the server writes a
> 'rpc.mountd: authenticated mount request from ...' in the message log.
> I've tried al kinds of kernel options without any luck. I've also tried
> 2.6.8, 2.6.9-rc4 and 2.6.9, but the only kernel that works is the
> 2.6.5-1.358 which comes with FC2. However, the client can run both FC2 stock
> kernel and 2.6.9 and still connect to the server (when run with kernel
> 2.6.5-1.358).
> 
> Some config info:
> /etc/exports:
>     /rootfs 192.168.1.0/24(rw,sync,no_root_squash)
> 
> /etc/hosts.deny is empty, /etc/hosts.allow: ALL:ALL
> 
> 
> Does anybody know what the problem is ?

I had a similar problem when replacing the RedHat kernel on Enterprise 3 
Update 3.  The problem was that the RedHat nfs-utils package didn't work 
properly with the vanilla kernels (even though it's version 1.0.6, it's 
a very much patched version of 1.0.6).  After replacing the nfs-utils 
package with a vanilla 1.0.6, things worked fine.

Thanks,

--
Jason Holmes



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Re: NFS Server problem (kernel > 2.6.5 ?)

[J. Bruce Fields]

On Tue, Oct 26, 2004 at 01:48:42PM -0400, Jason Holmes wrote:
> I had a similar problem when replacing the RedHat kernel on Enterprise 3 
> Update 3.  The problem was that the RedHat nfs-utils package didn't work 
> properly with the vanilla kernels (even though it's version 1.0.6, it's 
> a very much patched version of 1.0.6).  After replacing the nfs-utils 
> package with a vanilla 1.0.6, things worked fine.

That doesn't really explain what the problem was.  Would it be possible
to narrow down which patch exactly from the redhat rpm caused the
problem?

--Bruce Fields


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Re: NFS Server problem (kernel > 2.6.5 ?)

[mrg]

Thanks, it worked!

I uninstalled the nfs-utils-1.0.6-22 (from FC2), then installed
nfs-utils-1.0.6 from kernel.org. Et voila!

  - Geir R
----- Original Message -----
From: "Jason Holmes" <jholmes@psu.edu>
To: "mrg" <mrg@normailer.com>
Cc: <nfs@lists.sourceforge.net>
Sent: Tuesday, October 26, 2004 7:48 PM
Subject: Re: [NFS] NFS Server problem (kernel > 2.6.5 ?)


> mrg wrote:
> > Hi,
> >
> > I've had a server running FC2 for a while. I recently upgraded the
kernel to
> > 2.6.8.1, and then the NFS server stopped working.
> > I only get a 'Permission denied' on the client side, but the server
writes a
> > 'rpc.mountd: authenticated mount request from ...' in the message log.
> > I've tried al kinds of kernel options without any luck. I've also tried
> > 2.6.8, 2.6.9-rc4 and 2.6.9, but the only kernel that works is the
> > 2.6.5-1.358 which comes with FC2. However, the client can run both FC2
stock
> > kernel and 2.6.9 and still connect to the server (when run with kernel
> > 2.6.5-1.358).
> >
> > Some config info:
> > /etc/exports:
> >     /rootfs 192.168.1.0/24(rw,sync,no_root_squash)
> >
> > /etc/hosts.deny is empty, /etc/hosts.allow: ALL:ALL
> >
> >
> > Does anybody know what the problem is ?
>
> I had a similar problem when replacing the RedHat kernel on Enterprise 3
> Update 3.  The problem was that the RedHat nfs-utils package didn't work
> properly with the vanilla kernels (even though it's version 1.0.6, it's
> a very much patched version of 1.0.6).  After replacing the nfs-utils
> package with a vanilla 1.0.6, things worked fine.
>
> Thanks,
>
> --
> Jason Holmes
>
>



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Re: NFS Server problem (kernel > 2.6.5 ?)

[J. Bruce Fields]

On Wed, Oct 27, 2004 at 06:43:00PM +0200, mrg wrote:
> Thanks, it worked!
> 
> I uninstalled the nfs-utils-1.0.6-22 (from FC2), then installed
> nfs-utils-1.0.6 from kernel.org. Et voila!

If you download the FC2 srpm you can see the list of patches that
distinguishes their version from stock nfs-utils-1.0.6.  It might be
useful to figure out exactly which of those patches it is that causes
the problem.

--b.


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Re: NFS Server problem (kernel > 2.6.5 ?)

[Jason Holmes]

[-- Attachment #1: Type: text/plain, Size: 574 bytes --]

J. Bruce Fields wrote:
> On Wed, Oct 27, 2004 at 06:43:00PM +0200, mrg wrote:
> 
>>Thanks, it worked!
>>
>>I uninstalled the nfs-utils-1.0.6-22 (from FC2), then installed
>>nfs-utils-1.0.6 from kernel.org. Et voila!
> 
> 
> If you download the FC2 srpm you can see the list of patches that
> distinguishes their version from stock nfs-utils-1.0.6.  It might be
> useful to figure out exactly which of those patches it is that causes
> the problem.

For the Enterprise build, it's the "nfs-utils-1.0.6-mountd.patch" patch. 
  I've attached a copy.

Thanks,

--
Jason Holmes


[-- Attachment #2: nfs-utils-1.0.6-mountd.patch --]
[-- Type: text/plain, Size: 2206 bytes --]

#
# Make sure check_new_cache() is looking in the right place
#
--- src/support/nfs/cacheio.c.org	2003-08-04 00:12:16.000000000 -0400
+++ src/support/nfs/cacheio.c	2004-03-22 18:12:55.163534208 -0500
@@ -223,12 +223,23 @@ int readline(int fd, char **buf, int *le
  * This succeeds iff the "nfsd" filesystem is mounted on
  * /proc/fs/nfs
  */
+static char *cachelist[] = {
+	{ "auth.unix.ip" }, { "nfsd.export" }, { "nfsd.fh" }, 
+	{ NULL, NULL }
+};
 int
 check_new_cache(void)
 {
 	struct stat stb;
-	return	(stat("/proc/fs/nfs/filehandle", &stb) == 0) ||
-		(stat("/proc/fs/nfsd/filehandle", &stb) == 0);
+	char path[64];
+	int i;
+
+	for (i=0; cachelist[i]; i++ ){
+		sprintf(path, "/proc/net/rpc/%s/channel", cachelist[i]);
+		if (stat(path, &stb) < 0)
+			return 0;
+	}
+	return 1;
 }	


#
# Eliminate 3 syslog message that are logged for
# successful events.
#
--- src/utils/mountd/mountd.c.org	2003-09-12 18:14:16.000000000 -0400
+++ src/utils/mountd/mountd.c	2004-06-16 09:31:06.000000000 -0400
@@ -90,10 +90,11 @@ mount_dump_1_svc(struct svc_req *rqstp, 
 {
 	struct sockaddr_in *addr =
 		(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
-	xlog(L_NOTICE, "dump request from %s",
-		inet_ntoa(addr->sin_addr));
 
-	*res = mountlist_list();
+	if ((*res = mountlist_list()) == NULL)
+		xlog(L_WARNING, "dump request from %s failed.",
+			inet_ntoa(addr->sin_addr));
+
 	return 1;
 }
 
@@ -143,9 +144,11 @@ mount_export_1_svc(struct svc_req *rqstp
 {
 	struct sockaddr_in *addr =
 		(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
-	xlog(L_NOTICE, "export request from %s",
-		inet_ntoa(addr->sin_addr));
-	*resp = get_exportlist();
+
+	if ((*resp = get_exportlist()) == NULL)
+		xlog(L_WARNING, "export request from %s failed.",
+			inet_ntoa(addr->sin_addr));
+		
 	return 1;
 }
 
@@ -154,9 +157,10 @@ mount_exportall_1_svc(struct svc_req *rq
 {
 	struct sockaddr_in *addr =
 		(struct sockaddr_in *) svc_getcaller(rqstp->rq_xprt);
-	xlog(L_NOTICE, "exportall request from %s",
-		inet_ntoa(addr->sin_addr));
-	*resp = get_exportlist();
+
+	if ((*resp = get_exportlist()) == NULL)
+		xlog(L_WARNING, "exportall request from %s failed.",
+			inet_ntoa(addr->sin_addr));
 	return 1;
 }