1 /* $NetBSD: mdconfig.c,v 1.5 2009/10/21 23:12:10 snj 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #ifndef lint 30 __RCSID("$NetBSD: mdconfig.c,v 1.5 2009/10/21 23:12:10 snj Exp $"); 31 #endif 32 33 /* 34 * This program exists for the sole purpose of providing 35 * user-space memory for the new memory-disk driver (md). 36 * The job done by this is similar to mount_mfs. 37 * (But this design allows any filesystem format!) 38 */ 39 40 #include <sys/types.h> 41 #include <sys/ioctl.h> 42 #include <sys/mman.h> 43 #include <sys/param.h> 44 45 #include <dev/md.h> 46 47 #include <fcntl.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 51 int main __P((int, char **)); 52 53 int 54 main(argc, argv) 55 int argc; 56 char **argv; 57 { 58 struct md_conf md; 59 size_t nblks; 60 int fd; 61 62 if (argc <= 2) { 63 fprintf(stderr, "usage: mdconfig <device> <%d-byte-blocks>\n", 64 DEV_BSIZE); 65 exit(1); 66 } 67 68 nblks = (size_t)strtoul(argv[2], NULL, 0); 69 if (nblks == 0) { 70 fprintf(stderr, "invalid number of blocks\n"); 71 exit(1); 72 } 73 md.md_size = nblks << DEV_BSHIFT; 74 75 fd = open(argv[1], O_RDWR, 0); 76 if (fd < 0) { 77 perror(argv[1]); 78 exit(1); 79 } 80 81 md.md_addr = mmap(NULL, md.md_size, 82 PROT_READ | PROT_WRITE, 83 MAP_ANON | MAP_PRIVATE, 84 -1, 0); 85 if (md.md_addr == MAP_FAILED) { 86 perror("mmap"); 87 exit(1); 88 } 89 90 /* Become server! */ 91 md.md_type = MD_UMEM_SERVER; 92 if (ioctl(fd, MD_SETCONF, &md)) { 93 perror("ioctl"); 94 exit(1); 95 } 96 97 exit(0); 98 } 99