1 /* $NetBSD: mdconfig.c,v 1.3 1997/10/17 10:24:24 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Gordon W. Ross 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 4. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Gordon W. Ross 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __RCSID("$NetBSD: mdconfig.c,v 1.3 1997/10/17 10:24:24 lukem Exp $"); 36 #endif 37 38 /* 39 * This program exists for the sole purpose of providing 40 * user-space memory for the new memory-disk driver (md). 41 * The job done by this is similar to mount_mfs. 42 * (But this design allows any filesystem format!) 43 */ 44 45 #include <sys/types.h> 46 #include <sys/ioctl.h> 47 #include <sys/mman.h> 48 #include <sys/param.h> 49 50 #include <dev/md.h> 51 52 #include <fcntl.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 56 int main __P((int, char **)); 57 58 int 59 main(argc, argv) 60 int argc; 61 char **argv; 62 { 63 struct md_conf md; 64 int nblks, fd; 65 66 if (argc <= 2) { 67 fprintf(stderr, "usage: mdconfig <device> <%d-byte-blocks>\n", 68 DEV_BSIZE); 69 exit(1); 70 } 71 72 nblks = atoi(argv[2]); 73 if (nblks <= 0) { 74 fprintf(stderr, "invalid number of blocks\n"); 75 exit(1); 76 } 77 md.md_size = nblks << DEV_BSHIFT; 78 79 fd = open(argv[1], O_RDWR, 0); 80 if (fd < 0) { 81 perror(argv[1]); 82 exit(1); 83 } 84 85 md.md_addr = mmap(NULL, md.md_size, 86 PROT_READ | PROT_WRITE, 87 MAP_ANON | MAP_PRIVATE, 88 -1, 0); 89 if (md.md_addr == (caddr_t)-1) { 90 perror("mmap"); 91 exit(1); 92 } 93 94 /* Become server! */ 95 md.md_type = MD_UMEM_SERVER; 96 if (ioctl(fd, MD_SETCONF, &md)) { 97 perror("ioctl"); 98 exit(1); 99 } 100 101 exit(0); 102 } 103