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/types.h> 28 #include <sys/stat.h> 29 30 #include <err.h> 31 #include <fcntl.h> 32 #include <libgeom.h> 33 #include <disk.h> 34 #include <part.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 static int disk_strategy(void *devdata, int rw, daddr_t blk, 40 size_t size, char *buf, size_t *rsize); 41 42 /* stub struct devsw */ 43 struct devsw { 44 const char dv_name[8]; 45 int dv_type; 46 void *dv_init; 47 int (*dv_strategy)(void *devdata, int rw, daddr_t blk, 48 size_t size, char *buf, size_t *rsize); 49 void *dv_open; 50 void *dv_close; 51 void *dv_ioctl; 52 void *dv_print; 53 void *dv_cleanup; 54 } udisk = { 55 .dv_name = "disk", 56 .dv_strategy = disk_strategy 57 }; 58 59 struct disk { 60 uint64_t mediasize; 61 uint16_t sectorsize; 62 63 int fd; 64 int file; 65 } disk; 66 67 static int 68 disk_strategy(void *devdata, int rw, daddr_t blk, size_t size, char *buf, 69 size_t *rsize) 70 { 71 struct disk_devdesc *dev = devdata; 72 int ret; 73 74 if (rw != 1 /* F_READ */) 75 return (-1); 76 if (rsize) 77 *rsize = 0; 78 printf("read %zu bytes from the block %lld [+%lld]\n", size, 79 (long long)blk, (long long)dev->d_offset); 80 ret = pread(disk.fd, buf, size, 81 (blk + dev->d_offset) * disk.sectorsize); 82 if (ret != size) 83 return (-1); 84 return (0); 85 } 86 87 int 88 main(int argc, char **argv) 89 { 90 struct disk_devdesc dev; 91 struct stat sb; 92 const char *p; 93 94 if (argc < 2) 95 errx(1, "Usage: %s <GEOM provider name> | " 96 "<disk image file name>", argv[0]); 97 memset(&disk, 0, sizeof(disk)); 98 memset(&dev, 0, sizeof(dev)); 99 dev.d_dev = &udisk; 100 dev.d_slice = -1; 101 dev.d_partition = -1; 102 if (stat(argv[1], &sb) == 0 && S_ISREG(sb.st_mode)) { 103 disk.fd = open(argv[1], O_RDONLY); 104 if (disk.fd < 0) 105 err(1, "open %s", argv[1]); 106 disk.mediasize = sb.st_size; 107 disk.sectorsize = 512; 108 disk.file = 1; 109 } else { 110 disk.fd = g_open(argv[1], 0); 111 if (disk.fd < 0) 112 err(1, "g_open %s", argv[1]); 113 disk.mediasize = g_mediasize(disk.fd); 114 disk.sectorsize = g_sectorsize(disk.fd); 115 p = strpbrk(argv[1], "0123456789"); 116 if (p != NULL) 117 disk_parsedev(&dev, p, NULL); 118 } 119 printf("%s \"%s\" opened\n", disk.file ? "Disk image": "GEOM provider", 120 argv[1]); 121 printf("Mediasize: %ju Bytes (%ju sectors)\nSectorsize: %u Bytes\n", 122 disk.mediasize, disk.mediasize / disk.sectorsize, disk.sectorsize); 123 124 if (disk_open(&dev, disk.mediasize, disk.sectorsize) != 0) 125 errx(1, "disk_open failed"); 126 printf("\tdisk0:\n"); 127 disk_print(&dev, "\tdisk0", 1); 128 disk_close(&dev); 129 130 if (disk.file) 131 close(disk.fd); 132 else 133 g_close(disk.fd); 134 return (0); 135 } 136