175631Salfred/*- 275631Salfred * Copyright (c) 1998 Berkeley Software Design, Inc. All rights reserved. 375631Salfred * Redistribution and use in source and binary forms, with or without 475631Salfred * modification, are permitted provided that the following conditions 575631Salfred * are met: 675631Salfred * 1. Redistributions of source code must retain the above copyright 775631Salfred * notice, this list of conditions and the following disclaimer. 875631Salfred * 2. Redistributions in binary form must reproduce the above copyright 975631Salfred * notice, this list of conditions and the following disclaimer in the 1075631Salfred * documentation and/or other materials provided with the distribution. 1175631Salfred * 3. Berkeley Software Design Inc's name may not be used to endorse or 1275631Salfred * promote products derived from this software without specific prior 1375631Salfred * written permission. 1475631Salfred * 1575631Salfred * THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND 1675631Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1775631Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1875631Salfred * ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE 1975631Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2075631Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2175631Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2275631Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2375631Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2475631Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2575631Salfred * SUCH DAMAGE. 2675631Salfred * 2775631Salfred * from nfs_lock.h,v 2.2 1998/04/28 19:38:41 don Exp 2875631Salfred * $FreeBSD$ 2975631Salfred */ 3075631Salfred 3175631Salfred/* 3275631Salfred * lockd uses the nfssvc system call to get the unique kernel services it needs. 3375631Salfred * It passes in a request structure with a version number at the start. 3483651Speter * This prevents libc from needing to change if the information passed 3575631Salfred * between lockd and the kernel needs to change. 3675631Salfred * 3775631Salfred * If a structure changes, you must bump the version number. 3875631Salfred */ 3975631Salfred 4083651Speter/* 4175631Salfred * The fifo where the kernel writes requests for locks on remote NFS files, 4275631Salfred * and where lockd reads these requests. 4375631Salfred * 4475631Salfred */ 45138430Sphk#define _PATH_NFSLCKDEV "nfslock" 4675631Salfred 4775631Salfred/* 4875631Salfred * This structure is used to uniquely identify the process which originated 4975631Salfred * a particular message to lockd. A sequence number is used to differentiate 5075631Salfred * multiple messages from the same process. A process start time is used to 5175631Salfred * detect the unlikely, but possible, event of the recycling of a pid. 5275631Salfred */ 5375631Salfredstruct lockd_msg_ident { 5475631Salfred pid_t pid; /* The process ID. */ 5575631Salfred struct timeval pid_start; /* Start time of process id */ 5675631Salfred int msg_seq; /* Sequence number of message */ 5775631Salfred}; 5875631Salfred 59138430Sphk#define LOCKD_MSG_VERSION 3 6075631Salfred 6175631Salfred/* 6275631Salfred * The structure that the kernel hands us for each lock request. 6375631Salfred */ 6475631Salfredtypedef struct __lock_msg { 65138430Sphk TAILQ_ENTRY(__lock_msg) lm_link; /* internal linkage */ 6675631Salfred int lm_version; /* which version is this */ 6775631Salfred struct lockd_msg_ident lm_msg_ident; /* originator of the message */ 6875631Salfred struct flock lm_fl; /* The lock request. */ 6975631Salfred int lm_wait; /* The F_WAIT flag. */ 7075631Salfred int lm_getlk; /* is this a F_GETLK request */ 71100134Salfred struct sockaddr_storage lm_addr; /* The address. */ 7275631Salfred int lm_nfsv3; /* If NFS version 3. */ 7375631Salfred size_t lm_fh_len; /* The file handle length. */ 74101947Salfred struct xucred lm_cred; /* user cred for lock req */ 75210455Srmacklem u_int8_t lm_fh[NFSX_V3FHMAX];/* The file handle. */ 7675631Salfred} LOCKD_MSG; 7775631Salfred 7875631Salfred#define LOCKD_ANS_VERSION 1 7975631Salfred 8075631Salfredstruct lockd_ans { 8175631Salfred int la_vers; 8275631Salfred struct lockd_msg_ident la_msg_ident; /* originator of the message */ 8375631Salfred int la_errno; 8475631Salfred int la_set_getlk_pid; /* use returned pid */ 8575631Salfred int la_getlk_pid; /* returned pid for F_GETLK */ 8675631Salfred}; 8775631Salfred 8875631Salfred#ifdef _KERNEL 8975631Salfredint nfs_dolock(struct vop_advlock_args *ap); 90214048Srmacklemextern vop_advlock_t *nfs_advlock_p; 91214048Srmacklemextern vop_reclaim_t *nfs_reclaim_p; 9275631Salfred#endif 93