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coRpTitan
n00b
Joined: 21 Aug 2005
Posts: 55
Location: Czech Republic, Brno
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 Posted: Sun Apr 18, 2010 6:20 pm Post subject: NFS - startup problem. |
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Hello,
I'm trying to set-up server for diskless clients, I'm following this tutorial: http://www.gentoo.org/doc/en/diskless-howto.xml .
Everything goes fine, but I'm stuck at step, where I'm supposed to install and run NFS service.
I did exactly according to HowTo, unfortunately I'm not able to run that service. This is what I got, when trying to start it:
| Code: | # /etc/init.d/nfs start
Authenticating root.
Password:
* Exporting NFS directories ... [ ok ]
* Starting NFS mountd ... [ ok ]
* Starting NFS daemon ...
rpc.nfsd: Setting version failed: errno 16 (Device or resource busy)
rpc.nfsd: writing fd to kernel failed: errno 13 (Permission denied)
rpc.nfsd: unable to set any sockets for nfsd [ !! ]
* Starting NFS smnotify ... [ ok ]
* ERROR: nfs failed to start
# |
When I checked init.d script I found out it's trying to run it by using following: /usr/sbin/rpc.nfsd 8 .
When I tried to run it directly from bash via strace, to see where it's getting access denied, then I found out following:
| Code: |
open("/proc/fs/nfsd/versions", O_WRONLY|O_LARGEFILE) = 3
write(3, "+2 +3 +4 \n", 10) = -1 EBUSY (Device or resource busy)
write(2, "rpc.nfsd: ", 10rpc.nfsd: ) = 10
write(2, "Setting version failed: errno 16"..., 58Setting version failed: errno 16 (Device or resource busy)) = 58
write(2, "\n", 1
) = 1
close(3) = 0
...
...
...
open("/proc/fs/nfsd/portlist", O_WRONLY|O_LARGEFILE) = 3
write(3, "4\n", 2) = -1 EACCES (Permission denied)
write(2, "rpc.nfsd: ", 10rpc.nfsd: ) = 10
write(2, "writing fd to kernel failed: err"..., 57writing fd to kernel failed: errno 13 (Permission denied)) = 57
write(2, "\n", 1
) = 1
close(3) = 0
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So now it's clear that for some reason it can't write data into /proc/fs/nfsd/versions & /proc/fs/nfsd/portlist .
I'm SeLinux user, but my SeLinux is in "SELINUX=permissive" so it should not be blocked by SeLinux.
My TIP is that I forgot to enable some option in kernel, but I can't figure out which one :(
Thank you for any hints.
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Rexilion
Veteran
Joined: 17 Mar 2009
Posts: 1044
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| Posted: Tue Apr 20, 2010 7:42 am Post subject: |
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| It seems to want to 'write' it's version? Did you check you enabled the correct nfs options? (v3 vs v4?) |
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coRpTitan
n00b
Joined: 21 Aug 2005
Posts: 55
Location: Czech Republic, Brno
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| Posted: Sat Apr 24, 2010 10:15 am Post subject: |
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| Rexilion wrote: | | It seems to want to 'write' it's version? Did you check you enabled the correct nfs options? (v3 vs v4?) |
Sorry for long delay,
In kernel I don't have compiled support of NFSv4, and nfs-utils I have in last version, installed from portage with following:
USE="-nfsv4" emerge -av net-fs/nfs-utils
So it's also without NFSv4 support, only version 3 is enabled.
But I would say It should be able to write into that files, but can't for some reason, even when it's mounted with rw option:
| Code: | # mount | grep nfsd
nfsd on /proc/fs/nfsd type nfsd (rw,noexec,nosuid,nodev)
# |
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cerise
n00b
Joined: 20 Aug 2003
Posts: 10
Location: Fremont, CA, USA
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| Posted: Sat Aug 20, 2011 9:28 am Post subject: |
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| coRpTitan wrote: |
But I would say It should be able to write into that files, but can't for some reason, even when it's mounted with rw option: |
The reason it fails is from the kernel, but I haven't been able to figure out why it happens just yet. It has nothing to do (apparently) with any kernel options or SELinux.
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