1 /*- 2 * Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/stat.h> 32 33 #include <err.h> 34 #include <fcntl.h> 35 #include <libgeom.h> 36 #include <disk.h> 37 #include <part.h> 38 #include <stdio.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 static int disk_strategy(void *devdata, int rw, daddr_t blk, 43 size_t size, char *buf, size_t *rsize); 44 45 /* stub struct devsw */ 46 struct devsw { 47 const char dv_name[8]; 48 int dv_type; 49 void *dv_init; 50 int (*dv_strategy)(void *devdata, int rw, daddr_t blk, 51 size_t size, char *buf, size_t *rsize); 52 void *dv_open; 53 void *dv_close; 54 void *dv_ioctl; 55 void *dv_print; 56 void *dv_cleanup; 57 } udisk = { 58 .dv_name = "disk", 59 .dv_strategy = disk_strategy 60 }; 61 62 struct disk { 63 uint64_t mediasize; 64 uint16_t sectorsize; 65 66 int fd; 67 int file; 68 } disk; 69 70 static int 71 disk_strategy(void *devdata, int rw, daddr_t blk, size_t size, char *buf, 72 size_t *rsize) 73 { 74 struct disk_devdesc *dev = devdata; 75 int ret; 76 77 if (rw != 1 /* F_READ */) 78 return (-1); 79 if (rsize) 80 *rsize = 0; 81 printf("read %zu bytes from the block %lld [+%lld]\n", size, 82 (long long)blk, (long long)dev->d_offset); 83 ret = pread(disk.fd, buf, size, 84 (blk + dev->d_offset) * disk.sectorsize); 85 if (ret != size) 86 return (-1); 87 return (0); 88 } 89 90 int 91 main(int argc, char **argv) 92 { 93 struct disk_devdesc dev; 94 struct stat sb; 95 const char *p; 96 97 if (argc < 2) 98 errx(1, "Usage: %s <GEOM provider name> | " 99 "<disk image file name>", argv[0]); 100 memset(&disk, 0, sizeof(disk)); 101 memset(&dev, 0, sizeof(dev)); 102 dev.d_dev = &udisk; 103 dev.d_slice = -1; 104 dev.d_partition = -1; 105 if (stat(argv[1], &sb) == 0 && S_ISREG(sb.st_mode)) { 106 disk.fd = open(argv[1], O_RDONLY); 107 if (disk.fd < 0) 108 err(1, "open %s", argv[1]); 109 disk.mediasize = sb.st_size; 110 disk.sectorsize = 512; 111 disk.file = 1; 112 } else { 113 disk.fd = g_open(argv[1], 0); 114 if (disk.fd < 0) 115 err(1, "g_open %s", argv[1]); 116 disk.mediasize = g_mediasize(disk.fd); 117 disk.sectorsize = g_sectorsize(disk.fd); 118 p = strpbrk(argv[1], "0123456789"); 119 if (p != NULL) 120 disk_parsedev(&dev, p, NULL); 121 } 122 printf("%s \"%s\" opened\n", disk.file ? "Disk image": "GEOM provider", 123 argv[1]); 124 printf("Mediasize: %ju Bytes (%ju sectors)\nSectorsize: %u Bytes\n", 125 disk.mediasize, disk.mediasize / disk.sectorsize, disk.sectorsize); 126 127 if (disk_open(&dev, disk.mediasize, disk.sectorsize, 0) != 0) 128 errx(1, "disk_open failed"); 129 printf("\tdisk0:\n"); 130 disk_print(&dev, "\tdisk0", 1); 131 disk_close(&dev); 132 133 if (disk.file) 134 close(disk.fd); 135 else 136 g_close(disk.fd); 137 return (0); 138 } 139