SYNOPSIS
nfsd.read
VALUES
offset
- the offset of file
file
- argument file, indicates if the file has been opened.
vlen
- read blocks
client_ip
- the ip address of client
fh
- file handle (the first part is the length of the file handle)
count
- read bytes
size
- read bytes
vec
- struct kvec, includes buf address in kernel address and length of each buffer