Provided by: systemtap-doc_2.9-2ubuntu2_all 

NAME
probe::nfsd.proc.read - NFS server reading file for client
SYNOPSIS
nfsd.proc.read
VALUES
gid
requester's group id
count
read bytes
proto
transfer protocol
offset
the offset of file
fh
file handle (the first part is the length of the file handle)
uid
requester's user id
vlen
read blocks
vec
struct kvec, includes buf address in kernel address and length of each buffer
size
read bytes
version
nfs version
client_ip
the ip address of client
SEE ALSO
tapset::nfsd(3stap)
SystemTap Tapset Reference April 2016 PROBE::NFSD.PROC(3stap)