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|
# NFS RPC client -- RFC 1094
# XXX This is not yet complete.
# XXX Only GETATTR, SETTTR, LOOKUP and READDIR are supported.
# (See mountclient.py for some hints on how to write RPC clients in
# Python in general)
import rpc
from rpc import UDPClient, TCPClient
from mountclient import FHSIZE, MountPacker, MountUnpacker
NFS_PROGRAM = 100003
NFS_VERSION = 2
# enum stat
NFS_OK = 0
# (...many error values...)
# enum ftype
NFNON = 0
NFREG = 1
NFDIR = 2
NFBLK = 3
NFCHR = 4
NFLNK = 5
class NFSPacker(MountPacker):
def pack_sattrargs(self, sa):
file, attributes = sa
self.pack_fhandle(file)
self.pack_sattr(attributes)
def pack_sattr(self, sa):
mode, uid, gid, size, atime, mtime = sa
self.pack_uint(mode)
self.pack_uint(uid)
self.pack_uint(gid)
self.pack_uint(size)
self.pack_timeval(atime)
self.pack_timeval(mtime)
def pack_diropargs(self, da):
dir, name = da
self.pack_fhandle(dir)
self.pack_string(name)
def pack_readdirargs(self, ra):
dir, cookie, count = ra
self.pack_fhandle(dir)
self.pack_uint(cookie)
self.pack_uint(count)
def pack_timeval(self, tv):
secs, usecs = tv
self.pack_uint(secs)
self.pack_uint(usecs)
class NFSUnpacker(MountUnpacker):
def unpack_readdirres(self):
status = self.unpack_enum()
if status == NFS_OK:
entries = self.unpack_list(self.unpack_entry)
eof = self.unpack_bool()
rest = (entries, eof)
else:
rest = None
return (status, rest)
def unpack_entry(self):
fileid = self.unpack_uint()
name = self.unpack_string()
cookie = self.unpack_uint()
return (fileid, name, cookie)
def unpack_diropres(self):
status = self.unpack_enum()
if status == NFS_OK:
fh = self.unpack_fhandle()
fa = self.unpack_fattr()
rest = (fh, fa)
else:
rest = None
return (status, rest)
def unpack_attrstat(self):
status = self.unpack_enum()
if status == NFS_OK:
attributes = self.unpack_fattr()
else:
attributes = None
return status, attributes
def unpack_fattr(self):
type = self.unpack_enum()
mode = self.unpack_uint()
nlink = self.unpack_uint()
uid = self.unpack_uint()
gid = self.unpack_uint()
size = self.unpack_uint()
blocksize = self.unpack_uint()
rdev = self.unpack_uint()
blocks = self.unpack_uint()
fsid = self.unpack_uint()
fileid = self.unpack_uint()
atime = self.unpack_timeval()
mtime = self.unpack_timeval()
ctime = self.unpack_timeval()
return (type, mode, nlink, uid, gid, size, blocksize, \
rdev, blocks, fsid, fileid, atime, mtime, ctime)
def unpack_timeval(self):
secs = self.unpack_uint()
usecs = self.unpack_uint()
return (secs, usecs)
class NFSClient(UDPClient):
def __init__(self, host):
UDPClient.__init__(self, host, NFS_PROGRAM, NFS_VERSION)
def addpackers(self):
self.packer = NFSPacker()
self.unpacker = NFSUnpacker('')
def mkcred(self):
if self.cred is None:
self.cred = rpc.AUTH_UNIX, rpc.make_auth_unix_default()
return self.cred
def Getattr(self, fh):
return self.make_call(1, fh, \
self.packer.pack_fhandle, \
self.unpacker.unpack_attrstat)
def Setattr(self, sa):
return self.make_call(2, sa, \
self.packer.pack_sattrargs, \
self.unpacker.unpack_attrstat)
# Root() is obsolete
def Lookup(self, da):
return self.make_call(4, da, \
self.packer.pack_diropargs, \
self.unpacker.unpack_diropres)
# ...
def Readdir(self, ra):
return self.make_call(16, ra, \
self.packer.pack_readdirargs, \
self.unpacker.unpack_readdirres)
# Shorthand to get the entire contents of a directory
def Listdir(self, dir):
list = []
ra = (dir, 0, 2000)
while 1:
(status, rest) = self.Readdir(ra)
if status <> NFS_OK:
break
entries, eof = rest
last_cookie = None
for fileid, name, cookie in entries:
list.append((fileid, name))
last_cookie = cookie
if eof or last_cookie is None:
break
ra = (ra[0], last_cookie, ra[2])
return list
def test():
import sys
if sys.argv[1:]: host = sys.argv[1]
else: host = ''
if sys.argv[2:]: filesys = sys.argv[2]
else: filesys = None
from mountclient import UDPMountClient, TCPMountClient
mcl = TCPMountClient(host)
if filesys is None:
list = mcl.Export()
for item in list:
print item
return
sf = mcl.Mnt(filesys)
print sf
fh = sf[1]
if fh:
ncl = NFSClient(host)
as = ncl.Getattr(fh)
print as
list = ncl.Listdir(fh)
for item in list: print item
mcl.Umnt(filesys)
|
