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List:       sun-managers
Subject:    ZFS snoop problem
From:       Richard Skelton <Richard.Skelton () infineon ! com>
Date:       2012-05-25 10:23:00
Message-ID: 4FBF5D84.2090207 () infineon ! com
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Hi Managers,
I am running Solaris 11 as a NFS server and have found a script called 
nfsv3rwsnoop.d
It works fine for most files but some times it lists the file name as 
<unknown> why?

# ./nfsv3rwsnoop.d
TIME(us)         CLIENT             OP OFFSET    BYTES PATHNAME
1171685002348    192.168.17.75       W 3093304    2389 <unknown>
1171685003791    192.168.17.75       W 3093304    2426 <unknown>
1171687011333    192.168.17.75       W 3093304    2492 <unknown>
1171687013031    192.168.17.75       W 3093304    2529 <unknown>
1171689020596    192.168.17.75       W 3093304    2595 <unknown>


#  more ./nfsv3rwsnoop.d
#!/usr/sbin/dtrace -s
/* This DTrace scripts traces NFSv3 read and write requests, showing 
details of each operation
* ./nfsv3iosnoop.d
* TIME(us)         CLIENT             OP OFFSET    BYTES PATHNAME
* 4299383207       192.168.17.75       R 0          4096 
/export/stuff/bin/ghex2
* 4299391813       192.168.17.75       R 4         28672 
/export/stuff/bin/ghex2
* 4299395700       192.168.17.75       R 32        32768 
/export/stuff/bin/ghex2
*/
#pragma D option quiet
#pragma D option switchrate=10hz

dtrace:::BEGIN
{
         printf("%-16s %-18s %2s %-8s %6s %s\n", "TIME(us)",
             "CLIENT", "OP", "OFFSET", "BYTES", "PATHNAME");
}

nfsv3:::op-read-start
{
         printf("%-16d %-18s %2s %-8d %6d %s\n", timestamp / 1000,
             args[0]->ci_remote, "R", args[2]->offset / 1024, 
args[2]->count,
             args[1]->noi_curpath);
}

nfsv3:::op-write-start
{
         printf("%-16d %-18s %2s %-8d %6d %s\n", timestamp / 1000,
             args[0]->ci_remote, "W", args[2]->offset / 1024,
             args[2]->data.data_len, args[1]->noi_curpath);
}





-- 



Cheers

Richard Skelton
Richard.Skelton@infineon.com
Infineon Technologies UK Ltd
Infineon House
Great Western Court
Hunts Ground Road
Stoke Gifford
Bristol
BS34 8HP
Tel +44(0)117 952 8808
Fax: +44(0)117 952 8777
Mobile: +44(0)743 6272 137
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