Hi,
Can clnt_create for NFS versions fail in any
case due to security setting on NFS Sever ?
Description: NFS client can mount exported FS.
I have a small application which detects
health of NFS server by creating client
handle for required NFS version+protocol.
Can this ever fail consistenly=20
due to security or any other =20
settings on NFS server
(nfs client system and server are connected to=20
network, there is no hardware/(network load)=20
problem and portmapper + all nfs daemons are=20
runnnig)?
=20
thanks,
kiran
=20
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What kind of error do you get back from the clnt_create() ?
On 2/15/06, mehta kiran <[email protected]> wrote:
> Hi,
> Can clnt_create for NFS versions fail in any
> case due to security setting on NFS Sever ?
> Description: NFS client can mount exported FS.
> I have a small application which detects
> health of NFS server by creating client
> handle for required NFS version+protocol.
> Can this ever fail consistenly
> due to security or any other
> settings on NFS server
> (nfs client system and server are connected to
> network, there is no hardware/(network load)
> problem and portmapper + all nfs daemons are
> runnnig)?
>
> thanks,
> kiran
>
>
> __________________________________________________
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> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
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=3D121642
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Hi Kevin,
Sorry for not mentioning this.
I do not get any error.
Customers can have different settings
for NFS daemons.
I just want to confirm if
clnt_create is a realiable=20
way to monitor different=20
versions of nfsd running.
=20
thanks,
kiran
=20
=20
=20
=20
--- Kevin Coffman <[email protected]> wrote:
> What kind of error do you get back from the
> clnt_create() ?
>=20
> On 2/15/06, mehta kiran <[email protected]>
> wrote:
> > Hi,
> > Can clnt_create for NFS versions fail in any
> > case due to security setting on NFS Sever ?
> > Description: NFS client can mount exported FS.
> > I have a small application which detects
> > health of NFS server by creating client
> > handle for required NFS version+protocol.
> > Can this ever fail consistenly
> > due to security or any other
> > settings on NFS server
> > (nfs client system and server are connected to
> > network, there is no hardware/(network load)
> > problem and portmapper + all nfs daemons are
> > runnnig)?
> >
> > thanks,
> > kiran
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam? Yahoo! Mail has the best spam
> protection around
> > http://mail.yahoo.com
> >
> >
> >
>
-------------------------------------------------------
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> > NFS maillist - [email protected]
> > https://lists.sourceforge.net/lists/listinfo/nfs
> >
> >
>=20
--- Kevin Coffman <[email protected]> wrote:
> What kind of error do you get back from the
> clnt_create() ?
>=20
> On 2/15/06, mehta kiran <[email protected]>
> wrote:
> > Hi,
> > Can clnt_create for NFS versions fail in any
> > case due to security setting on NFS Sever ?
> > Description: NFS client can mount exported FS.
> > I have a small application which detects
> > health of NFS server by creating client
> > handle for required NFS version+protocol.
> > Can this ever fail consistenly
> > due to security or any other
> > settings on NFS server
> > (nfs client system and server are connected to
> > network, there is no hardware/(network load)
> > problem and portmapper + all nfs daemons are
> > runnnig)?
> >
> > thanks,
> > kiran
> >
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Tired of spam? Yahoo! Mail has the best spam
> protection around
> > http://mail.yahoo.com
> >
> >
> >
>
-------------------------------------------------------
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> you grep through log files
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> engine that makes
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http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D103432&bid=3D230486&dat=3D=
121642
> > _______________________________________________
> > NFS maillist - [email protected]
> > https://lists.sourceforge.net/lists/listinfo/nfs
> >
> >
>=20
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On Wed, 2006-02-15 at 08:16 -0800, mehta kiran wrote:
> Hi Kevin,
> Sorry for not mentioning this.
> I do not get any error.
> Customers can have different settings
> for NFS daemons.
> I just want to confirm if
> clnt_create is a realiable
> way to monitor different
> versions of nfsd running.
The only reasonably reliable way to check for RPC service availability
is to ping it using a NULL rpc call (procedure number == 0 and no
arguments).
Cheers,
Trond
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I noticed that clnt_create takes 3.5 min for tcp
and 1 min for udp protocol by default
(when taget system in UNREACHABLE). Anyway to modify
default timeout ? I could see that there are
functions like clnt_create_timed on solaris 5.8/5.9
but not on linux.
thanks,
kiran
--- Trond Myklebust <[email protected]>
wrote:
> On Thu, 2006-02-16 at 03:58 -0800, mehta kiran
> wrote:
> > Hi Trond,
> >=20
> > May be i am confused.
> > But, is this assumption ok :
> > that clnt_create/clnt_call call from a client
> system
> > will not fail due to any kind of security
> > settings(kerberos,firewall) on the nfs server
> > ( PS: client system can mount exported fs from
> > nfs server) ?
>=20
> Of course clnt_call can fail due to security
> settings on the server:
> they wouldn't be much use for security purposes if
> they didn't stop an
> actual RPC call. :-)
>=20
> clnt_create might succeed, though, since it doesn't
> actually try to talk
> to the server.
>=20
> Cheers,
> Trond
>=20
>=20
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On Tue, 2006-02-21 at 00:39 -0800, mehta kiran wrote:
> I noticed that clnt_create takes 3.5 min for tcp
> and 1 min for udp protocol by default
> (when taget system in UNREACHABLE). Anyway to modify
> default timeout ? I could see that there are
> functions like clnt_create_timed on solaris 5.8/5.9
> but not on linux.
'man 3 rpc' and look for the clnt_control() function
Cheers
Trond
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Hi Trond,
perhaps i was not clear.
I am talking about timeout for clnt_create
and not about clnt_call which already has
client handle in place. clnt_control will act on=20
client handle and i am searching for something which
will create client handle within specified timeout=20
if possible.
thanks,
kiran
--- Trond Myklebust <[email protected]>
wrote:
> On Tue, 2006-02-21 at 00:39 -0800, mehta kiran
> wrote:
> > I noticed that clnt_create takes 3.5 min for tcp
> > and 1 min for udp protocol by default
> > (when taget system in UNREACHABLE). Anyway to
> modify
> > default timeout ? I could see that there are
> > functions like clnt_create_timed on solaris
> 5.8/5.9
> > but not on linux.
>=20
> 'man 3 rpc' and look for the clnt_control() function
>=20
> Cheers
> Trond
>=20
>=20
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On Tue, 2006-02-21 at 05:15 -0800, mehta kiran wrote:
> Hi Trond,
> perhaps i was not clear.
> I am talking about timeout for clnt_create
> and not about clnt_call which already has
> client handle in place. clnt_control will act on
> client handle and i am searching for something which
>
> will create client handle within specified timeout
> if possible.
AFAICS clnt_create() will only do RPC calls if you fail to specify the
port number to connect to, in which case it needs to call pmap_getport.
The portmapper timeout values appear to be hardcoded into the glibc rpc
code, but writing your own client for PMAP_GETPORT should be trivial.
Cheers
Trond
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