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nuttx-bb/nuttx/fs/nfs/rpc.h

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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>
#include "nfs_proto.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Version # */
#define RPC_VER2 2
/* Authentication */
#define RPCAUTH_NULL 0
#define RPCAUTH_UNIX 1
#define RPCAUTH_SHORT 2
#define RPCAUTH_KERB4 4
#define RPCAUTH_MAXSIZ 400
#define RPCVERF_MAXSIZ 12
/* For Kerb, can actually be 400 */
#define RPCAUTH_UNIXGIDS 16
/* Constants associated with authentication flavours. */
#define RPCAKN_FULLNAME 0
#define RPCAKN_NICKNAME 1
/* Rpc Constants */
#define RPC_CALL 0
#define RPC_REPLY 1
#define RPC_MSGACCEPTED 0
#define RPC_MSGDENIED 1
#define RPC_PROGUNAVAIL 1
#define RPC_PROGMISMATCH 2
#define RPC_PROCUNAVAIL 3
#define RPC_GARBAGE 4
#define RPC_MISMATCH 0
#define RPC_AUTHERR 1
/* Authentication failures */
#define AUTH_BADCRED 1
#define AUTH_REJECTCRED 2
#define AUTH_BADVERF 3
#define AUTH_REJECTVERF 4
#define AUTH_TOOWEAK 5
/* Sizes of rpc header parts */
#define RPC_SIZ 24
#define RPC_REPLYSIZ 28
/* RPC Prog definitions */
#define RPCPROG_MNT 100005
#define RPCMNT_VER1 1
#define RPCMNT_VER3 3
#define RPCMNT_MOUNT 1
#define RPCMNT_DUMP 2
#define RPCMNT_UMOUNT 3
#define RPCMNT_UMNTALL 4
#define RPCMNT_EXPORT 5
#define RPCMNT_NAMELEN 255
#define RPCMNT_PATHLEN 1024
#define RPCPROG_NFS 100003
/* 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
/* RPC definitions for the portmapper. */
#define PMAPPORT 111
#define PMAPPROG 100000
#define PMAPVERS 2
#define PMAPPROC_NULL 0
#define PMAPPROC_SET 1
#define PMAPPROC_UNSET 2
#define PMAPPROC_GETPORT 3
#define PMAPPROC_DUMP 4
#define PMAPPROC_CALLIT 5
#define RPCCLNT_DEBUG 1
#define RPC_TICKINTVL 5
/* from nfs/nfsproto.h */
#define RPC_MAXDATA 32768
#define RPC_MAXPKTHDR 404
#define RPC_MAXPACKET (RPC_MAXPKTHDR + RPC_MAXDATA)
#define RPCX_UNSIGNED 4
#define RPC_SUCCESS 0
/* Flag values for r_flags */
#define TASK_TIMING 0x01 /* timing request (in mntp) */
#define TASK_SENT 0x02 /* request has been sent */
#define TASK_SOFTTERM 0x04 /* soft mnt, too many retries */
#define TASK_INTR 0x08 /* intr mnt, signal pending */
#define TASK_SOCKERR 0x10 /* Fatal error on socket */
#define TASK_TPRINTFMSG 0x20 /* Did a tprintf msg. */
#define TASK_MUSTRESEND 0x40 /* Must resend request */
#define TASK_GETONEREP 0x80 /* Probe for one reply only */
#define RPC_HZ (CLOCKS_PER_SEC / rpcclnt_ticks) /* Ticks/sec */
#define RPC_TIMEO (1 * RPC_HZ) /* Default timeout = 1 second */
#define RPC_MAXREXMIT 100 /* Stop counting after this many */
#define RPCIGNORE_SOERROR(s, e) \
((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK)
#define RPCINT_SIGMASK (sigmask(SIGINT)|sigmask(SIGTERM)|sigmask(SIGKILL)| \
sigmask(SIGHUP)|sigmask(SIGQUIT))
#define RPCMADV(m, s) (m)->m_data += (s)
#define RPCAUTH_ROOTCREDS NULL
#define RPCCLNTINT_SIGMASK(set) \
(SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) || \
SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) || \
SIGISMEMBER(set, SIGQUIT))
/****************************************************************************
* Public Types
****************************************************************************/
struct xidr
{
uint32_t xid;
};
/* global rpcstats */
struct rpcstats
{
int rpcretries;
int rpcrequests;
int rpctimeouts;
int rpcunexpected;
int rpcinvalid;
};
/* PMAP headers */
struct call_args_pmap
{
uint32_t prog;
uint32_t vers;
uint32_t proc;
uint32_t port;
};
struct call_result_pmap
{
uint32_t port;
};
/* MOUNTD headers */
struct call_args_mount
{
uint32_t len;
char rpath[90];
};
struct call_result_mount
{
uint32_t status;
nfsfh_t fhandle;
};
/* Generic RPC call headers */
enum auth_flavor
{
AUTH_NONE = 0,
AUTH_SYS = 1,
AUTH_SHORT = 2
/* and more to be defined */
};
struct rpc_auth_info
{
enum auth_flavor authtype; /* auth type */
uint32_t authlen; /* auth length */
};
struct auth_unix
{
int32_t stamp;
unsigned char hostname; /* null */
int32_t uid;
int32_t gid;
int32_t gidlist; /* null */
};
struct rpc_call_header
{
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;
#ifdef CONFIG_NFS_UNIX_AUTH
struct auth_unix rpc_unix;
#endif
struct rpc_auth_info rpc_verf;
};
struct rpc_call_pmap
{
struct rpc_call_header ch;
struct call_args_pmap pmap;
};
struct rpc_call_mount
{
struct rpc_call_header ch;
struct call_args_mount mount;
};
struct rpc_call_create
{
struct rpc_call_header ch;
struct CREATE3args create;
};
struct rpc_call_lookup
{
struct rpc_call_header ch;
struct LOOKUP3args lookup;
};
struct rpc_call_read
{
struct rpc_call_header ch;
struct READ3args read;
};
struct rpc_call_write
{
struct rpc_call_header ch;
struct WRITE3args write;
};
struct rpc_call_remove
{
struct rpc_call_header ch;
struct REMOVE3args remove;
};
struct rpc_call_rename
{
struct rpc_call_header ch;
struct RENAME3args rename;
};
struct rpc_call_mkdir
{
struct rpc_call_header ch;
struct MKDIR3args mkdir;
};
struct rpc_call_rmdir
{
struct rpc_call_header ch;
struct RMDIR3args rmdir;
};
struct rpc_call_readdir
{
struct rpc_call_header ch;
struct READDIR3args readdir;
};
struct rpc_call_fs
{
struct rpc_call_header ch;
struct FS3args fs;
};
/* Generic RPC reply headers */
struct rpc_reply_header
{
uint32_t rp_xid; /* Request transaction id */
uint32_t rp_direction; /* Call direction (1) */
uint32_t type;
struct rpc_auth_info rpc_verfi;
uint32_t status;
};
struct rpc_reply_pmap
{
struct rpc_reply_header rh;
struct call_result_pmap pmap;
};
struct rpc_reply_mount
{
struct rpc_reply_header rh;
struct call_result_mount mount;
};
struct rpc_reply_create
{
struct rpc_reply_header rh;
uint32_t status;
struct CREATE3resok create;
};
struct rpc_reply_write
{
struct rpc_reply_header rh;
uint32_t status;
struct WRITE3resok write;
};
struct rpc_reply_read
{
struct rpc_reply_header rh;
uint32_t status;
struct READ3resok read;
};
struct rpc_reply_remove
{
struct rpc_reply_header rh;
uint32_t status;
struct REMOVE3resok remove;
};
struct rpc_reply_rename
{
struct rpc_reply_header rh;
uint32_t status;
struct RENAME3resok rename;
};
struct rpc_reply_mkdir
{
struct rpc_reply_header rh;
uint32_t status;
struct MKDIR3resok mkdir;
};
struct rpc_reply_rmdir
{
struct rpc_reply_header rh;
uint32_t status;
struct RMDIR3resok rmdir;
};
struct rpc_reply_readdir
{
struct rpc_reply_header rh;
uint32_t status;
struct READDIR3resok readdir;
};
struct rpc_reply_fsinfo
{
struct rpc_reply_header rh;
uint32_t status;
struct nfsv3_fsinfo fsinfo;
};
struct rpc_reply_fsstat
{
struct rpc_reply_header rh;
uint32_t status;
struct nfs_statfs fsstat;
};
struct rpc_reply_getattr
{
struct rpc_reply_header rh;
uint32_t status;
struct nfs_fattr attr;
};
/* RPC Client connection context. One allocated on every NFS mount.
* Holds RPC specific information for mount.
*/
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 */
};
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 */
nfsfh_t rc_fh; /* File handle of root dir */
char *rc_path; /* server's path of the directory being mount */
struct sockaddr *rc_name;
struct socket *rc_so; /* Rpc socket */
uint8_t rc_sotype; /* Type of socket */
int rc_soproto; /* and protocol */
uint8_t 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_init(void);
int rpcclnt_connect(struct rpcclnt *);
int rpcclnt_reconnect(struct rpctask *);
void rpcclnt_disconnect(struct rpcclnt *);
int rpcclnt_umount(struct rpcclnt *);
void rpcclnt_safedisconnect(struct rpcclnt *);
int rpcclnt_request(FAR struct rpcclnt *, int, int, int, void *,
FAR const void *, size_t);
int rpcclnt_lookup(FAR struct rpcclnt *rpc, FAR const char *relpath,
FAR struct file_handle *fhandle,
FAR struct nfs_fattr *obj_attributes,
FAR struct nfs_fattr *dir_attributes);
#undef COMP
#ifdef COMP
int rpcclnt_cancelreqs(struct rpcclnt *);
#endif
#endif /* __FS_NFS_RPC_H */
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