1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2001-2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _RSMLIB_IN_H 28 #define _RSMLIB_IN_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/mman.h> 38 #include <sys/stat.h> 39 #include <fcntl.h> 40 41 #define LOOPBACK "loopback" 42 #define DEVRSM "/dev/rsm" 43 #define RSMSEGIDFILE "/etc/rsm/rsm.segmentid" 44 #define RSMSEG_RESERVED "reserved" 45 46 #define RSM_IMPORT_SEG 1 47 #define RSM_EXPORT_SEG 2 48 49 #define RSM_MAX_HANDLE_DVMA 0x2000 50 51 /* This is the default barrier implementation structure */ 52 typedef struct { 53 rsmseg_handle_t *rsmgenbar_seg; 54 uint16_t rsmgenbar_gen; 55 rsm_barrier_t *rsmgenbar_data; 56 }rsmgenbar_handle_t; 57 58 #define RSM_MAX_BUCKETS 128 /* # buckets in the hash table */ 59 #define RSM_POLLFD_PER_CHUNK 16 /* # pollfd in each chunk */ 60 61 /* least significant 3 bytes of the fd should be unique enough */ 62 #define RSM_POLLFD_HASH(fd) (((fd) ^ ((fd) >> 8) ^ ((fd) >> 16)) % \ 63 RSM_MAX_BUCKETS) 64 65 /* 66 * pollfd_table maintains a mapping from fd to resource number. It also 67 * provides a mechanism to check if a given fd corresponds to an rsmapi 68 * segment. Entries get added to this table as a result of 69 * rsm_memseg_get_pollfd and removed as a result of rsm_memseg_release_pollfd. 70 */ 71 typedef struct { 72 int fd; 73 minor_t segrnum; 74 }rsm_pollfd_element_t; 75 76 typedef struct rsm_pollfd_chunk { 77 struct rsm_pollfd_chunk *next; 78 int nfree; 79 rsm_pollfd_element_t fdarray[RSM_POLLFD_PER_CHUNK]; 80 } rsm_pollfd_chunk_t; 81 82 typedef struct { 83 mutex_t lock; 84 rsm_pollfd_chunk_t *buckets[RSM_MAX_BUCKETS]; 85 } rsm_pollfd_table_t; 86 87 /* 88 * The following macros are defined only if the DEBUG flag is enabled 89 * The macro makes use of category and level values defined in rsm.h 90 * and the dbg_printf function defined in rsmlib.c (defined as an 91 * extern below) 92 */ 93 #ifdef DEBUG 94 #define TRACELOG "/tmp/librsm.log" 95 #define DBPRINTF(msg) dbg_printf msg 96 #else 97 #define TRACELOG 98 #define DBPRINTF(msg) 99 #endif 100 101 extern void dbg_printf(int category, int level, char *fmt, ...); 102 103 typedef int (*rsm_attach_entry_t)(int, rsm_segops_t **); 104 105 #ifdef __cplusplus 106 } 107 #endif 108 109 #endif /* _RSMLIB_IN_H */ 110