2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* fs/nfs/nfs_socket.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
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* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
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*
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* Leveraged from OpenBSD:
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*
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* copyright (c) 2004
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* the regents of the university of michigan
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* all rights reserved
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2012-03-17 01:25:34 +01:00
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*
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* permission is granted to use, copy, create derivative works and redistribute
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* this software and such derivative works for any purpose, so long as the name
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* of the university of michigan is not used in any advertising or publicity
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* pertaining to the use or distribution of this software without specific,
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* written prior authorization. if the above copyright notice or any other
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* identification of the university of michigan is included in any copy of any
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* portion of this software, then the disclaimer below must also be included.
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*
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* this software is provided as is, without representation from the university
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* of michigan as to its fitness for any purpose, and without warranty by the
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* university of michigan of any kind, either express or implied, including
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* without limitation the implied warranties of merchantability and fitness for
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* a particular purpose. the regents of the university of michigan shall not be
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* liable for any damages, including special, indirect, incidental, or
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* consequential damages, with respect to any claim arising out of or in
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* connection with the use of the software, even if it has been or is hereafter
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* advised of the possibility of such damages.
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2012-03-22 01:51:01 +01:00
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*
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****************************************************************************/
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2012-03-17 01:25:34 +01:00
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2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* Included Files
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****************************************************************************/
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2012-03-17 01:25:34 +01:00
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#include <sys/socket.h>
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2012-03-22 01:51:01 +01:00
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#include <queue.h>
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#include <time.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <debug.h>
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#include "nfs_args.h"
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#include "rpc.h"
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2012-03-17 01:25:34 +01:00
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#include "rpc_v2.h"
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2012-03-22 01:51:01 +01:00
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#include "nfs_proto.h"
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2012-03-17 01:25:34 +01:00
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#include "nfs.h"
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#include "xdr_subs.h"
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2012-03-22 01:51:01 +01:00
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#include "nfs_mount.h"
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2012-03-17 01:25:34 +01:00
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#include "nfs_socket.h"
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2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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2012-03-17 01:25:34 +01:00
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/* Flag translations */
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2012-03-22 01:51:01 +01:00
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2012-04-14 02:27:44 +02:00
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#define nfsmnt_to_rpcclnt(nf, rf, name) do \
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{ \
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if (nf & NFSMNT_##name) \
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{ \
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rf |= RPCCLNT_##name; \
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} \
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} while(0)
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2012-03-17 01:25:34 +01:00
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2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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2012-03-17 01:25:34 +01:00
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static struct rpc_program nfs3_program =
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{
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NFS_PROG, NFS_VER3, "NFSv3"
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};
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2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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2012-03-28 02:10:43 +02:00
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int nfs_ticks;
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2012-03-22 01:51:01 +01:00
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void nfs_init(void)
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2012-03-17 01:25:34 +01:00
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{
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2012-03-22 01:51:01 +01:00
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rpcclnt_init();
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}
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2012-03-17 01:25:34 +01:00
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int nfsx_connect(struct nfsmount *nmp)
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{
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struct rpcclnt *rpc;
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int error = 0;
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if (nmp == NULL)
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2012-04-14 02:27:44 +02:00
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{
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return EFAULT;
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}
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2012-03-17 01:25:34 +01:00
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rpc = &nmp->nm_rpcclnt;
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rpc->rc_prog = &nfs3_program;
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2012-04-14 02:27:44 +02:00
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nvdbg("nfsxconnect!\n");
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2012-03-17 01:25:34 +01:00
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/* translate nfsmnt flags -> rpcclnt flags */
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2012-04-14 02:27:44 +02:00
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2012-03-17 01:25:34 +01:00
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rpc->rc_flag = 0;
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nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, SOFT);
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nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, INT);
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nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, NOCONN);
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nfsmnt_to_rpcclnt(nmp->nm_flag, rpc->rc_flag, DUMBTIMR);
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2012-03-22 01:51:01 +01:00
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//rpc->rc_flag |= RPCCLNT_REDIRECT; /* Make this a mount option. */
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2012-03-17 01:25:34 +01:00
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rpc->rc_authtype = RPCAUTH_NULL; /* for now */
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2012-03-22 01:51:01 +01:00
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//rpc->rc_servername = nmp->nm_mountp->mnt_stat.f_mntfromname;
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2012-03-17 01:25:34 +01:00
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rpc->rc_name = (struct sockaddr *)nmp->nm_nam;
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rpc->rc_sotype = nmp->nm_sotype;
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rpc->rc_soproto = nmp->nm_soproto;
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rpc->rc_rsize = (nmp->nm_rsize > nmp->nm_readdirsize) ?
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nmp->nm_rsize : nmp->nm_readdirsize;
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rpc->rc_wsize = nmp->nm_wsize;
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rpc->rc_deadthresh = nmp->nm_deadthresh;
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rpc->rc_timeo = nmp->nm_timeo;
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rpc->rc_retry = nmp->nm_retry;
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/* XXX v2,3 need to use this */
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2012-04-14 02:27:44 +02:00
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2012-03-17 01:25:34 +01:00
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rpc->rc_proctlen = 0;
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rpc->rc_proct = NULL;
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if (error)
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2012-04-14 02:27:44 +02:00
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{
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return error;
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}
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2012-03-17 01:25:34 +01:00
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return rpcclnt_connect(rpc);
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}
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/* NFS disconnect. Clean up and unlink. */
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void nfsx_disconnect(struct nfsmount *nmp)
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{
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rpcclnt_disconnect(&nmp->nm_rpcclnt);
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}
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#ifdef CONFIG_NFS_TCPIP
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void nfsx_safedisconnect(struct nfsmount *nmp)
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{
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rpcclnt_safedisconnect(&nmp->nm_rpcclnt);
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}
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#endif
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2012-04-14 02:27:44 +02:00
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int nfsx_request_xx(struct nfsmount *nm, int procnum,void *datain, void *dataout)
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2012-03-17 01:25:34 +01:00
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{
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int error;
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struct nfsmount *nmp;
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struct rpcclnt *clnt;
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2012-03-28 02:10:43 +02:00
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struct rpc_reply *reply;
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2012-03-22 01:51:01 +01:00
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int trylater_delay;
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2012-03-17 01:25:34 +01:00
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2012-03-22 01:51:01 +01:00
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nmp = nm;
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2012-03-17 01:25:34 +01:00
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clnt = &nmp->nm_rpcclnt;
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tryagain:
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2012-03-28 02:10:43 +02:00
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memset(reply, 0, sizeof(struct rpc_reply));
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2012-03-17 01:25:34 +01:00
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2012-04-14 02:27:44 +02:00
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if ((error = rpcclnt_request(clnt, procnum, reply, datain)) != 0)
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{
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goto out;
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}
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2012-03-17 01:25:34 +01:00
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2012-04-14 02:27:44 +02:00
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dataout = reply->stat.where;
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2012-03-17 01:25:34 +01:00
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2012-03-22 01:51:01 +01:00
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if (reply->rpc_verfi.authtype != 0)
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2012-03-17 01:25:34 +01:00
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{
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2012-03-22 01:51:01 +01:00
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error = fxdr_unsigned(int, reply->rpc_verfi.authtype);
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2012-03-17 01:25:34 +01:00
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if ((nmp->nm_flag & NFSMNT_NFSV3) && error == NFSERR_TRYLATER)
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{
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error = 0;
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2012-03-22 01:51:01 +01:00
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trylater_delay *= NFS_TIMEOUTMUL;
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if (trylater_delay > NFS_MAXTIMEO)
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{
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trylater_delay = NFS_MAXTIMEO;
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}
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2012-03-17 01:25:34 +01:00
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goto tryagain;
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}
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2012-04-14 02:27:44 +02:00
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/* If the File Handle was stale, invalidate the
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* lookup cache, just in case.
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*/
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2012-03-17 01:25:34 +01:00
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if (error == ESTALE)
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2012-04-14 02:27:44 +02:00
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{
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ndbg("%s: ESTALE on mount from server \n",
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nmp->nm_rpcclnt.rc_prog->prog_name);
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}
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2012-03-17 01:25:34 +01:00
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else
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2012-04-14 02:27:44 +02:00
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{
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ndbg("%s: unknown error %d from server \n",
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2012-03-22 01:51:01 +01:00
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nmp->nm_rpcclnt.rc_prog->prog_name, error);
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2012-04-14 02:27:44 +02:00
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}
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2012-03-17 01:25:34 +01:00
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goto out;
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}
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2012-04-14 02:27:44 +02:00
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return 0;
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2012-03-22 01:51:01 +01:00
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2012-03-17 01:25:34 +01:00
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out:
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2012-04-14 02:27:44 +02:00
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return error;
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2012-03-17 01:25:34 +01:00
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}
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/* terminate any outstanding RPCs. */
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int nfsx_nmcancelreqs(struct nfsmount *nmp)
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{
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return rpcclnt_cancelreqs(&nmp->nm_rpcclnt);
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}
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