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 * 24 * cfsd_logfile.h 25 * 26 * Include file for the cfsd_logfile class. 27 */ 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 /* Copyright (c) 1994 by Sun Microsystems, Inc. */ 31 32 #ifndef CFSD_LOGFILE 33 #define CFSD_LOGFILE 34 35 /* should come up with a standard dlog version size */ 36 /* XXX should move these to <sys/fs/cachefs_dlog.h> */ 37 #define LOGFILE_ENTRY_START sizeof (long) 38 #define CFS_DLOG_ENTRY_MINSIZE sizeof (long) 39 40 /* mmap info */ 41 typedef struct mmap_info { 42 caddr_t i_pa; /* address of mmap section */ 43 size_t i_palen; /* length of mmap section */ 44 off_t i_paoff; /* offset of mmap section */ 45 off_t i_paend; /* end offset of mmap section */ 46 }mmap_info_t; 47 48 typedef struct cfsd_logfile_object { 49 char i_name[MAXPATHLEN * 3]; /* name of file */ 50 int i_fid; /* fid of file */ 51 off_t i_size; /* file size */ 52 int i_stat_nextcnt; /* number of next calls */ 53 int i_stat_offcnt; /* number of offset calls */ 54 int i_stat_mapmove; /* number of times map moved */ 55 long i_stat_mapdist; /* how far we move the map */ 56 57 mmap_info_t i_map_entry; /* mmap for log entries */ 58 mmap_info_t i_map_offset; /* mmap for arbitrary offsets */ 59 60 off_t i_cur_offset; /* offset to log entry */ 61 cfs_dlog_entry_t *i_cur_entry; /* ptr to log entry */ 62 63 long i_pagesize; /* size of a page */ 64 u_long i_pagemask; /* page alignment mask */ 65 long i_maplen; /* amount to map */ 66 int i_maxmap; /* max amount referenced */ 67 } cfsd_logfile_object_t; 68 69 cfsd_logfile_object_t *cfsd_logfile_create(void); 70 void cfsd_logfile_destroy(cfsd_logfile_object_t *cfsd_logfile_object_p); 71 72 int logfile_domap(cfsd_logfile_object_t *logfile_object_p, off_t off, int map); 73 caddr_t logfile_getaddr(cfsd_logfile_object_t *logfile_object_p, 74 off_t start, int map); 75 76 /* performs setup for the specified file */ 77 int logfile_setup(cfsd_logfile_object_t *logfile_object_p, 78 const char *filename, int maxmap); 79 void logfile_teardown(cfsd_logfile_object_t *logfile_object_p); 80 81 /* returns ptr to a log file entry */ 82 int logfile_entry(cfsd_logfile_object_t *logfile_object_p, off_t offset, 83 cfs_dlog_entry_t **entpp); 84 85 /* returns ptr to arbitrary point in log */ 86 int logfile_offset(cfsd_logfile_object_t *logfile_object_p, off_t offset, 87 caddr_t *addrp); 88 89 /* syncs the logfile to disk */ 90 int logfile_sync(cfsd_logfile_object_t *logfile_object_p); 91 92 /* prints out various stats how the log file is used */ 93 void logfile_dumpstats(cfsd_logfile_object_t *logfile_object_p); 94 95 #endif /* CFSD_LOGFILE */ 96