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/****************************************************************************
* fs/nfs/nfs_socket.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
*
* Leveraged from OpenBSD:
*
* copyright (c) 2004
* the regents of the university of michigan
* all rights reserved
*
* permission is granted to use, copy, create derivative works and redistribute
* this software and such derivative works for any purpose, so long as the name
* of the university of michigan is not used in any advertising or publicity
* pertaining to the use or distribution of this software without specific,
* written prior authorization. if the above copyright notice or any other
* identification of the university of michigan is included in any copy of any
* portion of this software, then the disclaimer below must also be included.
*
* this software is provided as is, without representation from the university
* of michigan as to its fitness for any purpose, and without warranty by the
* university of michigan of any kind, either express or implied, including
* without limitation the implied warranties of merchantability and fitness for
* a particular purpose. the regents of the university of michigan shall not be
* liable for any damages, including special, indirect, incidental, or
* consequential damages, with respect to any claim arising out of or in
* connection with the use of the software, even if it has been or is hereafter
* advised of the possibility of such damages.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/socket.h>
#include <queue.h>
#include <time.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <debug.h>
#include <nuttx/fs/nfs.h>
#include "nfs.h"
#include "rpc.h"
#include "rpc_v2.h"
#include "nfs_proto.h"
#include "xdr_subs.h"
#include "nfs_mount.h"
#include "nfs_socket.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Flag translations */
#define nfsmnt_to_rpcclnt(nf, rf, name) do \
{ \
if (nf & NFSMNT_##name) \
{ \
rf |= RPCCLNT_##name; \
} \
} while(0)
/****************************************************************************
* Private Variables
****************************************************************************/
static struct rpc_program nfs3_program =
{
NFS_PROG, NFS_VER3, "NFSv3"
};
/****************************************************************************
* Public Variables
****************************************************************************/
uint32_t nfs_true;
uint32_t nfs_false;
uint32_t nfs_xdrneg1;
int nfs_ticks;
struct nfsstats nfsstats;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
void nfs_init(void)
{
nfs_true = txdr_unsigned(TRUE);
nfs_false = txdr_unsigned(FALSE);
nfs_xdrneg1 = txdr_unsigned(-1);
nfs_ticks = (CLOCKS_PER_SEC * NFS_TICKINTVL + 500) / 1000;
if (nfs_ticks < 1)
{
nfs_ticks = 1;
}
rpcclnt_init();
}
int nfs_connect(struct nfsmount *nmp)
{
struct rpcclnt *rpc;
int error = 0;
if (nmp == NULL)
{
return EFAULT;
}
rpc = nmp->nm_rpcclnt;
rpc->rc_prog = &nfs3_program;
nvdbg("nfsxconnect!\n");
/* translate nfsmnt flags -> rpcclnt flags */
rpc->rc_flag = 0;
nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, SOFT);
nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, INT);
nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, NOCONN);
nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, DUMBTIMR);
//rpc->rc_flag |= RPCCLNT_REDIRECT; /* Make this a mount option. */
rpc->rc_authtype = RPCAUTH_NULL; /* for now */
//rpc->rc_servername = nmp->nm_mountp->mnt_stat.f_mntfromname;
rpc->rc_name = nmp->nm_nam;
rpc->rc_sotype = nmp->nm_sotype;
rpc->rc_soproto = nmp->nm_soproto;
rpc->rc_rsize = (nmp->nm_rsize > nmp->nm_readdirsize) ?
nmp->nm_rsize : nmp->nm_readdirsize;
rpc->rc_wsize = nmp->nm_wsize;
rpc->rc_deadthresh = nmp->nm_deadthresh;
rpc->rc_timeo = nmp->nm_timeo;
rpc->rc_retry = nmp->nm_retry;
/* XXX v2,3 need to use this */
rpc->rc_proctlen = 0;
rpc->rc_proct = NULL;
if (error)
{
return error;
}
return rpcclnt_connect(rpc);
}
/* NFS disconnect. Clean up and unlink. */
void nfs_disconnect(struct nfsmount *nmp)
{
rpcclnt_disconnect(nmp->nm_rpcclnt);
}
#ifdef CONFIG_NFS_TCPIP
void nfs_safedisconnect(struct nfsmount *nmp)
{
rpcclnt_safedisconnect(nmp->nm_rpcclnt);
}
#endif
int nfs_request(struct nfsmount *nmp, int procnum, void *datain, void *dataout)
{
int error;
struct rpcclnt *clnt;
struct rpc_reply *reply = NULL;
int trylater_delay;
clnt = nmp->nm_rpcclnt;
tryagain:
memset(reply, 0, sizeof(struct rpc_reply));
if ((error = rpcclnt_request(clnt, procnum, reply, datain)) != 0)
{
goto out;
}
dataout = reply->stat.where;
if (reply->rpc_verfi.authtype != 0)
{
error = fxdr_unsigned(int, reply->rpc_verfi.authtype);
if ((nmp->nm_flag & NFSMNT_NFSV3) && error == NFSERR_TRYLATER)
{
error = 0;
trylater_delay *= NFS_TIMEOUTMUL;
if (trylater_delay > NFS_MAXTIMEO)
{
trylater_delay = NFS_MAXTIMEO;
}
goto tryagain;
}
/* If the File Handle was stale, invalidate the
* lookup cache, just in case.
*/
if (error == ESTALE)
{
ndbg("%s: ESTALE on mount from server \n",
nmp->nm_rpcclnt->rc_prog->prog_name);
}
else
{
ndbg("%s: unknown error %d from server \n",
nmp->nm_rpcclnt->rc_prog->prog_name, error);
}
goto out;
}
return 0;
out:
return error;
}
/* terminate any outstanding RPCs. */
int nfs_nmcancelreqs(struct nfsmount *nmp)
{
return rpcclnt_cancelreqs(nmp->nm_rpcclnt);
}
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