dfdcada31e
user-mode lock manager, build a kernel with the NFSLOCKD option and add '-k' to 'rpc_lockd_flags' in rc.conf. Highlights include: * Thread-safe kernel RPC client - many threads can use the same RPC client handle safely with replies being de-multiplexed at the socket upcall (typically driven directly by the NIC interrupt) and handed off to whichever thread matches the reply. For UDP sockets, many RPC clients can share the same socket. This allows the use of a single privileged UDP port number to talk to an arbitrary number of remote hosts. * Single-threaded kernel RPC server. Adding support for multi-threaded server would be relatively straightforward and would follow approximately the Solaris KPI. A single thread should be sufficient for the NLM since it should rarely block in normal operation. * Kernel mode NLM server supporting cancel requests and granted callbacks. I've tested the NLM server reasonably extensively - it passes both my own tests and the NFS Connectathon locking tests running on Solaris, Mac OS X and Ubuntu Linux. * Userland NLM client supported. While the NLM server doesn't have support for the local NFS client's locking needs, it does have to field async replies and granted callbacks from remote NLMs that the local client has contacted. We relay these replies to the userland rpc.lockd over a local domain RPC socket. * Robust deadlock detection for the local lock manager. In particular it will detect deadlocks caused by a lock request that covers more than one blocking request. As required by the NLM protocol, all deadlock detection happens synchronously - a user is guaranteed that if a lock request isn't rejected immediately, the lock will eventually be granted. The old system allowed for a 'deferred deadlock' condition where a blocked lock request could wake up and find that some other deadlock-causing lock owner had beaten them to the lock. * Since both local and remote locks are managed by the same kernel locking code, local and remote processes can safely use file locks for mutual exclusion. Local processes have no fairness advantage compared to remote processes when contending to lock a region that has just been unlocked - the local lock manager enforces a strict first-come first-served model for both local and remote lockers. Sponsored by: Isilon Systems PR: 95247 107555 115524 116679 MFC after: 2 weeks
215 lines
4.8 KiB
C
215 lines
4.8 KiB
C
/* $NetBSD: rpc_msg.h,v 1.11 2000/06/02 22:57:56 fvdl Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*
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* from: @(#)rpc_msg.h 1.7 86/07/16 SMI
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* from: @(#)rpc_msg.h 2.1 88/07/29 4.0 RPCSRC
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* $FreeBSD$
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*/
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/*
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* rpc_msg.h
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* rpc message definition
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#ifndef _RPC_RPC_MSG_H
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#define _RPC_RPC_MSG_H
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#define RPC_MSG_VERSION ((uint32_t) 2)
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#define RPC_SERVICE_PORT ((u_short) 2048)
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/*
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* Bottom up definition of an rpc message.
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* NOTE: call and reply use the same overall stuct but
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* different parts of unions within it.
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*/
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enum msg_type {
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CALL=0,
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REPLY=1
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};
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enum reply_stat {
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MSG_ACCEPTED=0,
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MSG_DENIED=1
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};
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enum accept_stat {
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SUCCESS=0,
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PROG_UNAVAIL=1,
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PROG_MISMATCH=2,
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PROC_UNAVAIL=3,
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GARBAGE_ARGS=4,
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SYSTEM_ERR=5
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};
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enum reject_stat {
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RPC_MISMATCH=0,
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AUTH_ERROR=1
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};
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/*
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* Reply part of an rpc exchange
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*/
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/*
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* Reply to an rpc request that was accepted by the server.
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* Note: there could be an error even though the request was
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* accepted.
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*/
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struct accepted_reply {
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struct opaque_auth ar_verf;
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enum accept_stat ar_stat;
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union {
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struct {
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rpcvers_t low;
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rpcvers_t high;
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} AR_versions;
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struct {
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caddr_t where;
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xdrproc_t proc;
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} AR_results;
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/* and many other null cases */
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} ru;
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#define ar_results ru.AR_results
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#define ar_vers ru.AR_versions
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};
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/*
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* Reply to an rpc request that was rejected by the server.
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*/
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struct rejected_reply {
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enum reject_stat rj_stat;
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union {
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struct {
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rpcvers_t low;
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rpcvers_t high;
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} RJ_versions;
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enum auth_stat RJ_why; /* why authentication did not work */
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} ru;
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#define rj_vers ru.RJ_versions
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#define rj_why ru.RJ_why
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};
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/*
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* Body of a reply to an rpc request.
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*/
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struct reply_body {
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enum reply_stat rp_stat;
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union {
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struct accepted_reply RP_ar;
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struct rejected_reply RP_dr;
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} ru;
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#define rp_acpt ru.RP_ar
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#define rp_rjct ru.RP_dr
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};
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/*
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* Body of an rpc request call.
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*/
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struct call_body {
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rpcvers_t cb_rpcvers; /* must be equal to two */
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rpcprog_t cb_prog;
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rpcvers_t cb_vers;
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rpcproc_t cb_proc;
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struct opaque_auth cb_cred;
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struct opaque_auth cb_verf; /* protocol specific - provided by client */
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};
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/*
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* The rpc message
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*/
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struct rpc_msg {
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uint32_t rm_xid;
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enum msg_type rm_direction;
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union {
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struct call_body RM_cmb;
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struct reply_body RM_rmb;
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} ru;
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#define rm_call ru.RM_cmb
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#define rm_reply ru.RM_rmb
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};
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#define acpted_rply ru.RM_rmb.ru.RP_ar
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#define rjcted_rply ru.RM_rmb.ru.RP_dr
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__BEGIN_DECLS
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/*
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* XDR routine to handle a rpc message.
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* xdr_callmsg(xdrs, cmsg)
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* XDR *xdrs;
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* struct rpc_msg *cmsg;
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*/
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extern bool_t xdr_callmsg(XDR *, struct rpc_msg *);
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/*
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* XDR routine to pre-serialize the static part of a rpc message.
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* xdr_callhdr(xdrs, cmsg)
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* XDR *xdrs;
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* struct rpc_msg *cmsg;
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*/
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extern bool_t xdr_callhdr(XDR *, struct rpc_msg *);
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/*
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* XDR routine to handle a rpc reply.
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* xdr_replymsg(xdrs, rmsg)
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* XDR *xdrs;
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* struct rpc_msg *rmsg;
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*/
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extern bool_t xdr_replymsg(XDR *, struct rpc_msg *);
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/*
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* XDR routine to handle an accepted rpc reply.
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* xdr_accepted_reply(xdrs, rej)
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* XDR *xdrs;
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* struct accepted_reply *rej;
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*/
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extern bool_t xdr_accepted_reply(XDR *, struct accepted_reply *);
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/*
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* XDR routine to handle a rejected rpc reply.
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* xdr_rejected_reply(xdrs, rej)
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* XDR *xdrs;
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* struct rejected_reply *rej;
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*/
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extern bool_t xdr_rejected_reply(XDR *, struct rejected_reply *);
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/*
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* Fills in the error part of a reply message.
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* _seterr_reply(msg, error)
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* struct rpc_msg *msg;
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* struct rpc_err *error;
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*/
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extern void _seterr_reply(struct rpc_msg *, struct rpc_err *);
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__END_DECLS
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#endif /* !_RPC_RPC_MSG_H */
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