/*
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
/* Count how many four-byte chunks it takss to hold LEN bytes. */
#define INTSIZE(len) (((len)+3)>>2)
/* Each of these functions copies its second arg to *P, converting it
to XDR representation along the way. They then return the address after
the copied value. */
inline int *
xdr_encode_fhandle (int *p, void *fhandle)
{
bcopy (fhandle, p, NFSV2_FHSIZE);
return p + INTSIZE (NFSV2_FHSIZE);
}
inline void *
xdr_encode_data (void *p, char *data, size_t len)
{
int nints = INTLEN (len);
p[nints] = 0;
*p++ = htonl (len);
bcopy (string, p, len);
return p + nints;
}
inline void *
xdr_encode_string (void *p, char *string)
{
return xdr_encode_data (p, string, strlen (string));
}
/* The SATTR calls are different; they each only fill in one
or two attributes; the rest get -1. */
inline int *
xdr_encode_sattr_mode (int *p, u_int mode)
{
*p++ = htonl (sattr->mode);
*p++ = -1; /* uid */
*p++ = -1; /* gid */
*p++ = -1; /* size */
*p++ = -1; /* atime secs */
*p++ = -1; /* atime usecs */
*p++ = -1; /* mtime secs */
*p++ = -1; /* mtime usecs */
return p;
}
inline int *
xdr_encode_sattr_ids (int *p, u_int uid, u_int gid)
{
*p++ = -1; /* mode */
*p++ = htonl (uid);
*p++ = htonl (gid);
*p++ = -1; /* size */
*p++ = -1; /* atime secs */
*p++ = -1; /* atime usecs */
*p++ = -1; /* mtime secs */
*p++ = -1; /* mtime usecs */
return p;
}
inline int *
xdr_encode_sattr_size (int *p, off_t size)
{
*p++ = -1; /* mode */
*p++ = -1; /* uid */
*p++ = -1; /* gid */
*p++ = htonl (size);
*p++ = -1; /* atime secs */
*p++ = -1; /* atime usecs */
*p++ = -1; /* mtime secs */
*p++ = -1; /* mtime secs */
return p;
}
inline int *
xdr_encode_sattr_times (int *p, struct timespec *atime, struct timespec *mtime)
{
*p++ = -1; /* mode */
*p++ = -1; /* uid */
*p++ = -1; /* gid */
*p++ = -1; /* size */
*p++ = htonl (atime->ts_sec);
*p++ = htonl (atime->ts_nsec * 1000);
*p++ = htonl (mtime->ts_sec);
*p++ = htonl (mtime->ts_nsec * 1000);
return p;
}
/* Decode *P into a stat structure; return the address of the
following data. */
int *
xdr_decode_fattr (int *p, struct stat *st)
{
int type, mode;
type = ntohl (*p++);
mode = ntohl (*p++);
st->st_mode = nfsv2mode_to_hurdmode (type, mode);
st->st_nlink = ntohl (*p++);
st->st_uid = ntohl (*p++);
st->st_gid = ntohl (*p++);
st->st_size = ntohl (*p++);
st->st_blksize = ntohl (*p++);
st->st_rdev = ntohl (*p++);
st->st_blocks = ntohl (*p++);
st->st_fsid = ntohl (*p++); /* surely wrong */
st->st_ino = ntohl (*p++);
st->st_atime = ntohl (*p++);
st->st_atime_usec = ntohl (*p++);
st->st_mtime = ntohl (*p++);
st->st_mtime_usec = ntohl (*p++);
st->st_ctime = ntohl (*p++);
st->st_ctime_usec = ntohl (*p++);
st->st_fstype = FSTYPE_NFS;
st->st_gen = 0; /* ??? */
st->st_author = st->st_uid; /* ??? */
st->st_flags = 0; /* ??? */
return p;
}
/* Create, initialize, and return a buffer suitable for sending an RPC
of type RPC_PROC for the user identified in CRED. For types READ,
WRITE, READLINK, and READDIR, parm LEN is the amount of data the
user desires. Return the address of where RPC args should go; fill
*pp with the address of the allocated memory. The RPC will be used
to operate on node NP. If this is a chown call, then set
SECOND_GID to the target of the call, else make it -1. */
int *
nfs_initialize_rpc (int rpc_proc, struct netcred *cred,
size_t len, void **pp, struct node *np,
uid_t second_gid)
{
void *buf = malloc (len + 1024);
int *p = buf, *lenaddr;
uid_t chosen_uid, chosen_gid;
/* RPC header */
*p++ = ntohl (generate_xid);
*p++ = ntohl (RPCV2_CALL);
*p++ = ntohl (RPCV2_VERSION);
*p++ = ntohl (NFSV2_RPC_PROGRAM);
*p++ = ntohl (NFSV2_RPC_VERSION);
*p++ = ntohl (rpc_proc);
/* CRED field */
if (cred
&& (cred->nuids || cred->ngids))
{
*p++ = htonl (RPCV2_AUTH_UNIX);
lenaddr = p++;
*p++ = htonl (mapped_time->seconds);
p = xdr_encode_string (p, hostname);
if (cred_has_uid (cred, 0))
{
netfs_validate_stat (np, 0);
chosen_uid = 0;
chosen_gid = nn->nn_stat.st_gid;
}
else
{
if (cred->nuids == 0)
chosen_uid = -2; /* Eeeewwww */
else if (cred->nuids == 1)
chosen_uid = cred->uids[0];
else
{
netfs_validate_stat (np, 0);
if (cred_has_uid (cred, nn->nn_stat.st_uid))
chosen_uid = nn->nn_stat.st_uid;
else
chosen_uid = cred->uids[0];
}
if (cred->ngids == 0)
{
chosen_gid = -2;
second_gid = -1;
}
else if (cred->ngids == 1)
{
chosen_gid = cred->gids[0];
second_gid = -1;
}
else
{
netfs_validate_stat (np, 0);
if (cred_has_gid (cred, nn->nn_stat.st_gid))
chosen_gid = nn->nn_stat.st_gid;
else
chosen_gid = cred->gids[0];
if ((second_gid >= 0)
&& (!cred_has_gid (cred, second_gid)))
second_gid = -1;
}
}
*p++ = htonl (chosen_uid);
*p++ = htonl (chosen_gid);
if (second_gid == -1)
{
*p++ = htonl (1);
*p++ = htonl (second_gid);
}
else
*p++ = 0;
*lenaddr = htonl ((p - (nlenaddr + 1)) * sizeof (int));
}
else
{
*p++ = htonl (RPC_AUTH_NULL);
*p++ = 0;
}
/* VERF field */
*p++ = htonl (RPC_AUTH_NULL);
*p++ = 0;
*pp = buf;
return p;
}