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