Nfs server writing data to a file for client
nfsd.write
vec
struct kvec, includes buf address in kernel address and length of each buffer
offset
the offset of file
fh
file handle (the first part is the length of the file handle)
count
read bytes
size
read bytes
client_ip
the ip address of client
vlen
read blocks
file
argument file, indicates if the file has been opened.