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/*
Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
This file is part of GlusterFS.
GlusterFS 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 3 of the License,
or (at your option) any later version.
GlusterFS 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, see
<http://www.gnu.org/licenses/>.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <arpa/inet.h>
#include <rpc/xdr.h>
#include <sys/uio.h>
#include <rpc/auth_unix.h>
#include "mem-pool.h"
#include "xdr-rpc.h"
#include "xdr-common.h"
#include "logging.h"
/* Decodes the XDR format in msgbuf into rpc_msg.
* The remaining payload is returned into payload.
*/
int
nfs_xdr_to_rpc_call (char *msgbuf, size_t len, struct rpc_msg *call,
struct iovec *payload, char *credbytes, char *verfbytes)
{
XDR xdr;
char opaquebytes[MAX_AUTH_BYTES];
struct opaque_auth *oa = NULL;
if ((!msgbuf) || (!call))
return -1;
memset (call, 0, sizeof (*call));
oa = &call->rm_call.cb_cred;
if (!credbytes)
oa->oa_base = opaquebytes;
else
oa->oa_base = credbytes;
oa = &call->rm_call.cb_verf;
if (!verfbytes)
oa->oa_base = opaquebytes;
else
oa->oa_base = verfbytes;
xdrmem_create (&xdr, msgbuf, len, XDR_DECODE);
if (!xdr_callmsg (&xdr, call))
return -1;
if (payload) {
payload->iov_base = nfs_xdr_decoded_remaining_addr (xdr);
payload->iov_len = nfs_xdr_decoded_remaining_len (xdr);
}
return 0;
}
bool_t
nfs_true_func (XDR *s, caddr_t *a)
{
return TRUE;
}
int
nfs_rpc_fill_empty_reply (struct rpc_msg *reply, uint32_t xid)
{
if (!reply)
return -1;
/* Setting to 0 also results in reply verifier flavor to be
* set to AUTH_NULL which is what we want right now.
*/
memset (reply, 0, sizeof (*reply));
reply->rm_xid = xid;
reply->rm_direction = REPLY;
return 0;
}
int
nfs_rpc_fill_denied_reply (struct rpc_msg *reply, int rjstat, int auth_err)
{
if (!reply)
return -1;
reply->rm_reply.rp_stat = MSG_DENIED;
reply->rjcted_rply.rj_stat = rjstat;
if (rjstat == RPC_MISMATCH) {
/* No problem with hardocoding
* RPC version numbers. We only support
* v2 anyway.
*/
reply->rjcted_rply.rj_vers.low = 2;
reply->rjcted_rply.rj_vers.high = 2;
} else if (rjstat == AUTH_ERROR)
reply->rjcted_rply.rj_why = auth_err;
return 0;
}
int
nfs_rpc_fill_accepted_reply (struct rpc_msg *reply, int arstat, int proglow,
int proghigh, int verf, int len, char *vdata)
{
if (!reply)
return -1;
reply->rm_reply.rp_stat = MSG_ACCEPTED;
reply->acpted_rply.ar_stat = arstat;
reply->acpted_rply.ar_verf.oa_flavor = verf;
reply->acpted_rply.ar_verf.oa_length = len;
reply->acpted_rply.ar_verf.oa_base = vdata;
if (arstat == PROG_MISMATCH) {
reply->acpted_rply.ar_vers.low = proglow;
reply->acpted_rply.ar_vers.high = proghigh;
} else if (arstat == SUCCESS) {
/* This is a hack. I'd really like to build a custom
* XDR library because Sun RPC interface is not very flexible.
*/
reply->acpted_rply.ar_results.proc = (xdrproc_t)nfs_true_func;
reply->acpted_rply.ar_results.where = NULL;
}
return 0;
}
int
nfs_rpc_reply_to_xdr (struct rpc_msg *reply, char *dest, size_t len,
struct iovec *dst)
{
XDR xdr;
if ((!dest) || (!reply) || (!dst))
return -1;
xdrmem_create (&xdr, dest, len, XDR_ENCODE);
if (!xdr_replymsg(&xdr, reply))
return -1;
dst->iov_base = dest;
dst->iov_len = nfs_xdr_encoded_length (xdr);
return 0;
}
int
nfs_xdr_to_auth_unix_cred (char *msgbuf, int msglen, struct authunix_parms *au,
char *machname, gid_t *gids)
{
XDR xdr;
if ((!msgbuf) || (!machname) || (!gids) || (!au))
return -1;
au->aup_machname = machname;
#ifdef GF_DARWIN_HOST_OS
au->aup_gids = (int *)gids;
#else
au->aup_gids = gids;
#endif
xdrmem_create (&xdr, msgbuf, msglen, XDR_DECODE);
if (!xdr_authunix_parms (&xdr, au))
return -1;
return 0;
}
ssize_t
nfs_xdr_length_round_up (size_t len, size_t bufsize)
{
int roundup = 0;
roundup = len % NFS_XDR_BYTES_PER_UNIT;
if (roundup > 0)
roundup = NFS_XDR_BYTES_PER_UNIT - roundup;
if ((roundup > 0) && ((roundup + len) <= bufsize))
len += roundup;
return len;
}
int
nfs_xdr_bytes_round_up (struct iovec *vec, size_t bufsize)
{
vec->iov_len = nfs_xdr_length_round_up (vec->iov_len, bufsize);
return 0;
}
void
nfs_xdr_vector_round_up (struct iovec *vec, int vcount, uint32_t count)
{
uint32_t round_count = 0;
round_count = nfs_xdr_length_round_up (count, 1048576);
round_count -= count;
if (round_count == 0)
return;
vec[vcount-1].iov_len += round_count;
}
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