Re: stuck/hung nfsv4 mounts

["Brian J. Murrell" <brian-SquOHqY54CVWr29BmMi2cA@public.gmane.org>]

On Mon, 2008-11-03 at 17:33 -0500, Kevin Coffman wrote:
> If you can get
> a packet trace between the client and server during the mount /
> context negotiation, check the NULL reply from the server for this
> error code.

Here is the NULL Call from client:
No.     Time            Time Delta  Source                Destination           Protocol Info
   8868 20:07:43.933888 0.043671    10.75.22.1            10.75.22.3            NFS      V4 NULL Call (Reply In 8870)

Frame 8868 (606 bytes on wire, 606 bytes captured)
Ethernet II, Src: AsustekC_e1:65:cc (00:18:f3:e1:65:cc), Dst: Intel_3f:8b:74 (00:d0:b7:3f:8b:74)
Internet Protocol, Src: 10.75.22.1 (10.75.22.1), Dst: 10.75.22.3 (10.75.22.3)
Transmission Control Protocol, Src Port: imaps (993), Dst Port: nfs (2049), Seq: 1, Ack: 1, Len: 552
Remote Procedure Call, Type:Call XID:0x48023eeb
Network File System
    [Program Version: 4]
    [V4 Procedure: NULL (0)]
    GSS Token: ...
        GSS Token Length: 483
        GSS-API Generic Security Service Application Program Interface
            OID: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5)
            krb5_blob: ...
                krb5_tok_id: KRB5_AP_REQ (0x0001)
                Kerberos AP-REQ
                    Pvno: 5
                    MSG Type: AP-REQ (14)
                    Padding: 0
                    APOptions: 20000000 (Mutual required)
                        .0.. .... .... .... .... .... .... .... = Use Session Key: Do NOT use the session key to encrypt the ticket
                        ..1. .... .... .... .... .... .... .... = Mutual required: MUTUAL authentication is REQUIRED
                    Ticket
                        Tkt-vno: 5
                        Realm: ILINX
                        Server Name (Service and Host): nfs/linux.interlinx.bc.ca
                        enc-part des-cbc-crc
                    Authenticator des-cbc-crc

Here is the NULL reply from the server:

No.     Time            Time Delta  Source                Destination           Protocol Info
   8870 20:07:44.062206 0.128081    10.75.22.3            10.75.22.1            NFS      V4 NULL Reply (Call In 8868)

Frame 8870 (262 bytes on wire, 262 bytes captured)
Ethernet II, Src: Intel_3f:8b:74 (00:d0:b7:3f:8b:74), Dst: AsustekC_e1:65:cc (00:18:f3:e1:65:cc)
Internet Protocol, Src: 10.75.22.3 (10.75.22.3), Dst: 10.75.22.1 (10.75.22.1)
Transmission Control Protocol, Src Port: nfs (2049), Dst Port: imaps (993), Seq: 1, Ack: 553, Len: 208
Remote Procedure Call, Type:Reply XID:0x48023eeb
Network File System
    [Program Version: 4]
    [V4 Procedure: NULL (0)]
    GSS Context: <DATA>
    GSS Major Status: 0
    GSS Minor Status: 0
    GSS Sequence Window: 128
    GSS Token: ...
        GSS Token Length: 114
        GSS-API Generic Security Service Application Program Interface
            OID: 1.2.840.113554.1.2.2 (KRB5 - Kerberos 5)
            krb5_blob: ...
                krb5_tok_id: KRB5_AP_REP (0x0002)
                Kerberos AP-REP
                    Pvno: 5
                    MSG Type: AP-REP (15)
                    enc-part des-cbc-crc
                        Encryption type: des-cbc-crc (1)
                        enc-part: ...

b.