1 /* $NetBSD: mdconfig.c,v 1.6 2018/01/23 21:06:25 sevan 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 1.6 2018/01/23 21:06:25 sevan 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 52 main(int argc, char *argv[]) 53 { 54 struct md_conf md; 55 size_t nblks; 56 int fd; 57 58 if (argc <= 2) { 59 fprintf(stderr, "usage: mdconfig <device> <%d-byte-blocks>\n", 60 DEV_BSIZE); 61 exit(1); 62 } 63 64 nblks = (size_t)strtoul(argv[2], NULL, 0); 65 if (nblks == 0) { 66 fprintf(stderr, "invalid number of blocks\n"); 67 exit(1); 68 } 69 md.md_size = nblks << DEV_BSHIFT; 70 71 fd = open(argv[1], O_RDWR, 0); 72 if (fd < 0) { 73 perror(argv[1]); 74 exit(1); 75 } 76 77 md.md_addr = mmap(NULL, md.md_size, 78 PROT_READ | PROT_WRITE, 79 MAP_ANON | MAP_PRIVATE, 80 -1, 0); 81 if (md.md_addr == MAP_FAILED) { 82 perror("mmap"); 83 exit(1); 84 } 85 86 /* Become server! */ 87 md.md_type = MD_UMEM_SERVER; 88 if (ioctl(fd, MD_SETCONF, &md)) { 89 perror("ioctl"); 90 exit(1); 91 } 92 93 exit(0); 94 } 95