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/****************************************************************************
* fs/nfs/rpc.h
*
* 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) 2003
* 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.
*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
****************************************************************************/
#ifndef __FS_NFS_RPC_H
#define __FS_NFS_RPC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* for rpcclnt's rc_flags */
#define RPCCLNT_SOFT 0x001 /* soft mount (hard is details) */
#define RPCCLNT_INT 0x002 /* allow interrupts on hard mounts */
#define RPCCLNT_NOCONN 0x004 /* dont connect the socket (udp) */
#define RPCCLNT_DUMBTIMR 0x010
/* XXX should be replaced with real locks */
#define RPCCLNT_SNDLOCK 0x100
#define RPCCLNT_WANTSND 0x200
#define RPCCLNT_RCVLOCK 0x400
#define RPCCLNT_WANTRCV 0x800
/****************************************************************************
* Public Types
****************************************************************************/
struct rpc_program
{
uint32_t prog_id;
uint32_t prog_version;
char * prog_name;
};
struct rpctask
{
dq_entry_t r_chain;
struct rpcclnt *r_rpcclnt;
uint32_t r_xid;
int r_flags; /* flags on request, see below */
int r_retry; /* max retransmission count */
int r_rexmit; /* current retrans count */
int r_timer; /* tick counter on reply */
int r_procnum; /* NFS procedure number */
int r_rtt; /* RTT for rpc */
};
/* Generic RPC headers */
struct rpc_auth_info
{
uint32_t authtype; /* auth type */
uint32_t authlen; /* auth length */
};
struct auth_unix
{
int32_t ua_time;
int32_t ua_hostname; /* null */
int32_t ua_uid;
int32_t ua_gid;
int32_t ua_gidlist; /* null */
};
struct rpc_call
{
uint32_t rp_xid; /* request transaction id */
int32_t rp_direction; /* call direction (0) */
uint32_t rp_rpcvers; /* rpc version (2) */
uint32_t rp_prog; /* program */
uint32_t rp_vers; /* version */
uint32_t rp_proc; /* procedure */
struct rpc_auth_info rpc_auth;
struct auth_unix rpc_unix;
struct rpc_auth_info rpc_verf;
};
struct rpc_reply
{
uint32_t rp_xid; /* request transaction id */
int32_t rp_direction; /* call direction (1) */
struct
{
uint32_t type;
uint32_t status;
void *where; /* Data */
/* used only when reply == RPC_MSGDENIED and status == RPC_AUTHERR */
uint32_t autherr;
/* rpc mismatch info if reply == RPC_MSGDENIED and status == RPC_MISMATCH */
struct
{
uint32_t low;
uint32_t high;
} mismatch_info;
} stat;
struct rpc_auth_info rpc_verfi;
};
/* RPC Client connection context.
* One allocated on every NFS mount.
* Holds RPC specific information for mount.
*/
/* XXX: please note that all pointer type variables are just set (not copied),
* so it is up to the user to free these values */
struct rpcclnt
{
int rc_flag; /* For RPCCLNT_* flags */
int rc_wsize; /* Max size of the request data */
int rc_rsize; /* Max size of the response data */
struct sockaddr *rc_name;
struct socket *rc_so; /* Rpc socket */
int rc_sotype; /* Type of socket */
int rc_soproto; /* and protocol */
int rc_soflags; /* pr_flags for socket protocol */
int rc_timeo; /* Init timer for NFSMNT_DUMBTIMR */
int rc_retry; /* Max retries */
int rc_srtt[4]; /* Timers for rpcs */
int rc_sdrtt[4];
int rc_sent; /* Request send count */
int rc_cwnd; /* Request send window */
int rc_timeouts; /* Request timeouts */
int rc_deadthresh; /* Threshold of timeouts-->dead server*/
/* authentication: */
/* currently can be RPCAUTH_NULL, RPCAUTH_KERBV4, RPCAUTH_UNIX */
/* should be kept in XDR form */
int rc_authtype; /* Authenticator type */
#ifdef CONFIG_NFS_UNIX_AUTH
/* RPCAUTH_UNIX*/
struct rpc_auth_info rc_oldauth; /* authentication */
#endif
void *rc_auth;
struct rpc_program * rc_prog;
//char *rc_servername;
int rc_proctlen; /* if == 0 then rc_proct == NULL */
int * rc_proct;
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/*
void rpcclnt_create(struct rpcclnt ** rpc);
void rpcclnt_destroy(struct rpcclnt * rpc);
#define rpcclnt_get(X) rpcclnt_create(&(X))
#define rpcclnt_put(X) rpcclnt_destroy(X)
*/
void rpcclnt_init(void);
//void rpcclnt_uninit(void);
int rpcclnt_setup(struct rpcclnt *, struct rpc_program *, struct sockaddr *, int, int, struct rpc_auth_info *, int, int, int);
int rpcclnt_connect(struct rpcclnt *);
int rpcclnt_reconnect(struct rpctask *);
void rpcclnt_disconnect(struct rpcclnt *);
void rpcclnt_safedisconnect(struct rpcclnt *);
int rpcclnt_request(struct rpcclnt *, int, struct rpc_reply *);
int rpcclnt_cancelreqs(struct rpcclnt *);
#endif /* _RPCCLNT_H_ */
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