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 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 #include <sys/types.h> 35 #include <sys/mman.h> 36 #include <sys/stat.h> 37 #include <fcntl.h> 38 39 #define LOOPBACK "loopback" 40 #define DEVRSM "/dev/rsm" 41 #define RSMSEGIDFILE "/etc/rsm/rsm.segmentid" 42 #define RSMSEG_RESERVED "reserved" 43 44 #define RSM_IMPORT_SEG 1 45 #define RSM_EXPORT_SEG 2 46 47 #define RSM_MAX_HANDLE_DVMA 0x2000 48 49 /* This is the default barrier implementation structure */ 50 typedef struct { 51 rsmseg_handle_t *rsmgenbar_seg; 52 uint16_t rsmgenbar_gen; 53 rsm_barrier_t *rsmgenbar_data; 54 }rsmgenbar_handle_t; 55 56 #define RSM_MAX_BUCKETS 128 /* # buckets in the hash table */ 57 #define RSM_POLLFD_PER_CHUNK 16 /* # pollfd in each chunk */ 58 59 /* least significant 3 bytes of the fd should be unique enough */ 60 #define RSM_POLLFD_HASH(fd) (((fd) ^ ((fd) >> 8) ^ ((fd) >> 16)) % \ 61 RSM_MAX_BUCKETS) 62 63 /* 64 * pollfd_table maintains a mapping from fd to resource number. It also 65 * provides a mechanism to check if a given fd corresponds to an rsmapi 66 * segment. Entries get added to this table as a result of 67 * rsm_memseg_get_pollfd and removed as a result of rsm_memseg_release_pollfd. 68 */ 69 typedef struct { 70 int fd; 71 minor_t segrnum; 72 }rsm_pollfd_element_t; 73 74 typedef struct rsm_pollfd_chunk { 75 struct rsm_pollfd_chunk *next; 76 int nfree; 77 rsm_pollfd_element_t fdarray[RSM_POLLFD_PER_CHUNK]; 78 } rsm_pollfd_chunk_t; 79 80 typedef struct { 81 mutex_t lock; 82 rsm_pollfd_chunk_t *buckets[RSM_MAX_BUCKETS]; 83 } rsm_pollfd_table_t; 84 85 /* 86 * The following macros are defined only if the DEBUG flag is enabled 87 * The macro makes use of category and level values defined in rsm.h 88 * and the dbg_printf function defined in rsmlib.c (defined as an 89 * extern below) 90 */ 91 #ifdef DEBUG 92 #define TRACELOG "/tmp/librsm.log" 93 #define DBPRINTF(msg) dbg_printf msg 94 #else 95 #define TRACELOG 96 #define DBPRINTF(msg) 97 #endif 98 99 extern void dbg_printf(int category, int level, char *fmt, ...); 100 101 typedef int (*rsm_attach_entry_t)(int, rsm_segops_t **); 102 103 #ifdef __cplusplus 104 } 105 #endif 106 107 #endif /* _RSMLIB_IN_H */ 108