1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 2001 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #ifndef _NBMLOCK_H 28*0Sstevel@tonic-gate #define _NBMLOCK_H 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate /* 33*0Sstevel@tonic-gate * Non-blocking mandatory locking support. 34*0Sstevel@tonic-gate */ 35*0Sstevel@tonic-gate 36*0Sstevel@tonic-gate #ifdef __cplusplus 37*0Sstevel@tonic-gate extern "C" { 38*0Sstevel@tonic-gate #endif 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #include <sys/vnode.h> 41*0Sstevel@tonic-gate #include <sys/rwlock.h> 42*0Sstevel@tonic-gate #include <sys/cred.h> 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate /* 45*0Sstevel@tonic-gate * Type of operation; used when checking for lock/share conflict. 46*0Sstevel@tonic-gate * NBL_READWRITE is used for checking for a conflict with an exclusive lock 47*0Sstevel@tonic-gate * (F_WRLCK) or a read-write mmap request. For checking an actual I/O 48*0Sstevel@tonic-gate * request, use NBL_READ or NBL_WRITE. 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate typedef enum {NBL_READ, NBL_WRITE, NBL_RENAME, NBL_REMOVE, 51*0Sstevel@tonic-gate NBL_READWRITE} nbl_op_t; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate /* critical region primitives */ 54*0Sstevel@tonic-gate extern void nbl_start_crit(vnode_t *, krw_t); 55*0Sstevel@tonic-gate extern void nbl_end_crit(vnode_t *); 56*0Sstevel@tonic-gate extern int nbl_in_crit(vnode_t *); 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate /* conflict checking */ 59*0Sstevel@tonic-gate extern int nbl_need_check(vnode_t *); 60*0Sstevel@tonic-gate extern int nbl_conflict(vnode_t *, nbl_op_t, u_offset_t, ssize_t, int); 61*0Sstevel@tonic-gate extern int nbl_share_conflict(vnode_t *, nbl_op_t); 62*0Sstevel@tonic-gate extern int nbl_lock_conflict(vnode_t *, nbl_op_t, u_offset_t, ssize_t, int); 63*0Sstevel@tonic-gate extern int nbl_svmand(vnode_t *, cred_t *, int *); 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate extern nbl_op_t nbl_lock_to_op(int); 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate #ifdef __cplusplus 68*0Sstevel@tonic-gate } 69*0Sstevel@tonic-gate #endif 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate #endif /* _NBMLOCK_H */ 72