10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*5331Samw * Common Development and Distribution License (the "License"). 6*5331Samw * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate /* 22*5331Samw * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23*5331Samw * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 260Sstevel@tonic-gate #ifndef _NBMLOCK_H 270Sstevel@tonic-gate #define _NBMLOCK_H 280Sstevel@tonic-gate 290Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 300Sstevel@tonic-gate 310Sstevel@tonic-gate /* 320Sstevel@tonic-gate * Non-blocking mandatory locking support. 330Sstevel@tonic-gate */ 340Sstevel@tonic-gate 350Sstevel@tonic-gate #ifdef __cplusplus 360Sstevel@tonic-gate extern "C" { 370Sstevel@tonic-gate #endif 380Sstevel@tonic-gate 390Sstevel@tonic-gate #include <sys/vnode.h> 400Sstevel@tonic-gate #include <sys/rwlock.h> 410Sstevel@tonic-gate #include <sys/cred.h> 420Sstevel@tonic-gate 430Sstevel@tonic-gate /* 440Sstevel@tonic-gate * Type of operation; used when checking for lock/share conflict. 450Sstevel@tonic-gate * NBL_READWRITE is used for checking for a conflict with an exclusive lock 460Sstevel@tonic-gate * (F_WRLCK) or a read-write mmap request. For checking an actual I/O 470Sstevel@tonic-gate * request, use NBL_READ or NBL_WRITE. 480Sstevel@tonic-gate */ 490Sstevel@tonic-gate typedef enum {NBL_READ, NBL_WRITE, NBL_RENAME, NBL_REMOVE, 500Sstevel@tonic-gate NBL_READWRITE} nbl_op_t; 510Sstevel@tonic-gate 520Sstevel@tonic-gate /* critical region primitives */ 530Sstevel@tonic-gate extern void nbl_start_crit(vnode_t *, krw_t); 540Sstevel@tonic-gate extern void nbl_end_crit(vnode_t *); 550Sstevel@tonic-gate extern int nbl_in_crit(vnode_t *); 560Sstevel@tonic-gate 570Sstevel@tonic-gate /* conflict checking */ 580Sstevel@tonic-gate extern int nbl_need_check(vnode_t *); 59*5331Samw extern int nbl_conflict(vnode_t *, nbl_op_t, u_offset_t, ssize_t, int, 60*5331Samw caller_context_t *); 61*5331Samw extern int nbl_share_conflict(vnode_t *, nbl_op_t, caller_context_t *); 62*5331Samw extern int nbl_lock_conflict(vnode_t *, nbl_op_t, u_offset_t, ssize_t, int, 63*5331Samw caller_context_t *); 640Sstevel@tonic-gate extern int nbl_svmand(vnode_t *, cred_t *, int *); 650Sstevel@tonic-gate 660Sstevel@tonic-gate extern nbl_op_t nbl_lock_to_op(int); 670Sstevel@tonic-gate 680Sstevel@tonic-gate #ifdef __cplusplus 690Sstevel@tonic-gate } 700Sstevel@tonic-gate #endif 710Sstevel@tonic-gate 720Sstevel@tonic-gate #endif /* _NBMLOCK_H */ 73