Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
probe::nfs.proc.write_setup - NFS client setting up a write RPC task
SYNOPSIS
nfs.proc.write_setup
VALUES
version
NFS version
how
used to set args.stable. The stable value could be: NFS_UNSTABLE,NFS_DATA_SYNC,NFS_FILE_SYNC (in
nfs.proc3.write_setup and nfs.proc4.write_setup)
server_ip
IP address of server
prot
transfer protocol
size
bytes written in this execution
count
bytes written in this execution
bitmask0
V4 bitmask representing the set of attributes supported on this filesystem
bitmask1
V4 bitmask representing the set of attributes supported on this filesystem
offset
the file offset
DESCRIPTION
The write_setup function is used to setup a write RPC task. It is not doing the actual write operation.
SystemTap Tapset Reference March 2016 PROBE::NFS.PROC.(3stap)