probe::nfsd.proc.read — NFS server reading file for client
nfsd.proc.read
vec
struct kvec, includes buf address in kernel address and length of each buffer
fh
file handle (the first part is the length of the file handle)
vlen
read blocks
version
nfs version
proto
transfer protocol
gid
requester's group id
size
read bytes
offset
the offset of file
uid
requester's user id
client_ip
the ip address of client
count
read bytes