1 /*- 2 * Copyright (c) 1992 Keith Muller. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Keith Muller of the University of California, San Diego. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)cache.h 8.1 (Berkeley) 5/31/93 34 * $FreeBSD$ 35 */ 36 37 /* 38 * Constants and data structures used to implement group and password file 39 * caches. Traditional passwd/group cache routines perform quite poorly with 40 * archives. The chances of hitting a valid lookup with an archive is quite a 41 * bit worse than with files already resident on the file system. These misses 42 * create a MAJOR performance cost. To address this problem, these routines 43 * cache both hits and misses. 44 * 45 * NOTE: name lengths must be as large as those stored in ANY PROTOCOL and 46 * as stored in the passwd and group files. CACHE SIZES MUST BE PRIME 47 */ 48 #define UNMLEN 32 /* >= user name found in any protocol */ 49 #define GNMLEN 32 /* >= group name found in any protocol */ 50 #define UID_SZ 317 /* size of user_name/uid cache */ 51 #define UNM_SZ 317 /* size of user_name/uid cache */ 52 #define GID_SZ 251 /* size of gid cache */ 53 #define GNM_SZ 317 /* size of group name cache */ 54 #define VALID 1 /* entry and name are valid */ 55 #define INVALID 2 /* entry valid, name NOT valid */ 56 57 /* 58 * Node structures used in the user, group, uid, and gid caches. 59 */ 60 61 typedef struct uidc { 62 int valid; /* is this a valid or a miss entry */ 63 char name[UNMLEN]; /* uid name */ 64 uid_t uid; /* cached uid */ 65 } UIDC; 66 67 typedef struct gidc { 68 int valid; /* is this a valid or a miss entry */ 69 char name[GNMLEN]; /* gid name */ 70 gid_t gid; /* cached gid */ 71 } GIDC; 72