https://bugzilla.novell.com/show_bug.cgi?id=427330 Summary: Write error before starting nfsserver-service, when started the service that is already running Product: openSUSE 11.1 Version: Alpha 0 Platform: PowerPC-64 OS/Version: All Status: NEW Severity: Normal Priority: P5 - None Component: Installation AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: bugproxy@us.ibm.com QAContact: jsrain@novell.com Found By: Third Party Developer/Partner Partner ID: LTC 45004 =Comment: #0================================================= Indhu Durai - 2008-05-22 06:25 EDT Problem description: ==================== When i start the service nfsserver when the service is already running, i am facing following error, linux:~ # service nfsserver restart Shutting down kernel based NFS server: nfsd statd mountd done Starting kernel based NFS server: idmapd mountd statd nfsd sm-notify done linux:~ # service nfsserver start ------------------------------- error ------------------------------------------ Starting kernel based NFS server:/etc/init.d/nfsserver: line 170: echo: write error: Device or resource busy -------------------------------------------------------------------------------- idmapd mountd statd nfsd sm-notify done linux:~ # -------------------------------------------------------------------------------- Machine information: ==================== uname -a: Linux linux 2.6.25.3-2-ppc64 #1 SMP 2008-05-10 07:46:36 +0200 ppc64 ppc64 ppc64 GNU/Linux Hardware Environment Machine type (p650, x235, SF2, etc.): P510 Cpu type (Power4, Power5, IA-64, etc.):Power5 -------------------------------------------------------------------------------- Reproduce the issue: ==================== -> Start the nfsserver service -> Start the service again, when nfsserver is running. =Comment: #1================================================= Suzuki Kp - 2008-05-29 06:44 EDT The error is coming from the kernel : static ssize_t write_versions(struct file *file, char *buf, size_t size) { /* * Format: * [-/+]vers [-/+]vers ... */ char *mesg = buf; char *vers, sign; int len, num; ssize_t tlen = 0; char *sep; if (size>0) { if (nfsd_serv) /* Cannot change versions without updating * nfsd_serv->sv_xdrsize, and reallocing * rq_argp and rq_resp */ return -EBUSY; <<-- We get EBUSY here. nfsd_serv structure gets initialized when the nfs server starts. So when we try to start the nfs server again, it tries to write to the /proc/fs/nfsd/versions file. The write_versions() listed above checks whether the nfsd_serv is already initialized,(which is true for our case) and hence fails the write. Comment explains why this is done. Thanks Suzuki =Comment: #2================================================= Suzuki Kp - 2008-06-09 11:01 EDT I looked at this issue and I don't really see a problem with this. In the sense, the error can just be ignored as it is supposed to fail, if you write twice to the /proc/fs/nfsd/versions file. Any thoughts / comments ? Thanks Suzuki =Comment: #3================================================= Mohammed Omar - 2008-06-10 03:30 EDT Indhu/Suzuki, I agree , its an expected behavior. And I think /etc/init.d/nfsserver would have reported "service is already running" instead of "write error". For Example , If you try to start a service which is already running it behaves in different way... sshd daemon: ============ linux:~ # /etc/init.d/sshd status Checking for service sshd running linux:~ # /etc/init.d/sshd start Starting SSH daemon done smb daemon: =========== linux:~ # /etc/init.d/smb status Checking for Samba SMB daemon running linux:~ # /etc/init.d/smb start Starting Samba SMB daemon - Warning: daemon already running. done --Regards.. Omar M =Comment: #4================================================= Suzuki Kp - 2008-06-12 06:25 EDT (In reply to comment #3)

Indhu/Suzuki, I agree , its an expected behavior. And I think /etc/init.d/nfsserver would have reported "service is already running" instead of "write error".

The reason why the nfsserver doesn't do it here is because : There are 4 daemons associated with the nfsserver. nfsd, idmapd,mountd,statd . We have to check for each and every daemon before we say that nfsd is already up and running. May be we don't want to delay the services just to take care of this silly situation. Also, this messages is generated when we try to update the /proc/fs/nfsd/versions file and not while starting the daemon. Thanks Suzuki =Comment: #5================================================= Suzuki Kp - 2008-06-17 03:11 EDT Test patch Hi Indhu, Attached here is a patch which adds the check for whether the nfsserver is already running and exits if it is already up and running. Thanks Suzuki =Comment: #6================================================= Indhu Durai - 2008-07-11 02:37 EDT Hi Suzuki, Issue resolved. Thanks, Indhu Durai =Comment: #8================================================= Cijurajan Kollanoor - 2008-09-02 08:21 EDT Please test this patch. It is a simple patch that will write to the file /proc/fs/nfsd/exports only if nfsserver is not started. =Comment: #9================================================= Cijurajan Kollanoor - 2008-09-02 08:23 EDT patch to suppress the error message =Comment: #10================================================= Pavan Naregundi - 2008-09-17 02:30 EDT (In reply to comment #8) I have tested this patch. Patch looks OK. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.