1 | /* qcow-create.c |
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2 | * |
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3 | * Generates a qcow format disk. |
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4 | * |
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5 | * (c) 2006 Andrew Warfield and Julian Chesterfield |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License version 2 |
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9 | * as published by the Free Software Foundation; or, when distributed |
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10 | * separately from the Linux kernel or incorporated into other |
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11 | * software packages, subject to the following license: |
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12 | * |
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13 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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14 | * of this source file (the "Software"), to deal in the Software without |
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15 | * restriction, including without limitation the rights to use, copy, modify, |
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16 | * merge, publish, distribute, sublicense, and/or sell copies of the Software, |
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17 | * and to permit persons to whom the Software is furnished to do so, subject to |
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18 | * the following conditions: |
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19 | * |
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20 | * The above copyright notice and this permission notice shall be included in |
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21 | * all copies or substantial portions of the Software. |
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22 | * |
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23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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24 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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25 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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26 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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27 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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28 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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29 | * IN THE SOFTWARE. |
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30 | */ |
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31 | |
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32 | #include <errno.h> |
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33 | #include <fcntl.h> |
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34 | #include <stdio.h> |
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35 | #include <stdlib.h> |
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36 | #include <unistd.h> |
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37 | #include <sys/statvfs.h> |
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38 | #include <sys/stat.h> |
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39 | #include <sys/ioctl.h> |
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40 | #include <linux/fs.h> |
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41 | #include <string.h> |
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42 | #include "tapdisk.h" |
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43 | |
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44 | #if 1 |
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45 | #define DFPRINTF(_f, _a...) fprintf ( stderr, _f , ## _a ) |
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46 | #else |
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47 | #define DFPRINTF(_f, _a...) ((void)0) |
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48 | #endif |
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49 | |
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50 | #define MAX_NAME_LEN 1000 |
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51 | |
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52 | void help(void) |
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53 | { |
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54 | fprintf(stderr, "Qcow-utils: v1.0.0\n"); |
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55 | fprintf(stderr, |
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56 | "usage: qcow-create [-h help] [-r reserve] <SIZE(MB)> <FILENAME> " |
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57 | "[<BACKING_FILENAME>]\n"); |
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58 | exit(-1); |
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59 | } |
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60 | |
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61 | int main(int argc, char *argv[]) |
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62 | { |
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63 | int ret = -1, c, backed = 0; |
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64 | int sparse = 1; |
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65 | uint64_t size; |
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66 | char filename[MAX_NAME_LEN], bfilename[MAX_NAME_LEN]; |
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67 | |
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68 | for(;;) { |
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69 | c = getopt(argc, argv, "hr"); |
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70 | if (c == -1) |
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71 | break; |
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72 | switch(c) { |
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73 | case 'h': |
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74 | help(); |
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75 | exit(0); |
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76 | break; |
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77 | case 'r': |
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78 | sparse = 0; |
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79 | break; |
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80 | default: |
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81 | fprintf(stderr, "Unknown option\n"); |
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82 | help(); |
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83 | } |
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84 | } |
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85 | |
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86 | printf("Optind %d, argc %d\n", optind, argc); |
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87 | if ( !(optind == (argc - 2) || optind == (argc - 3)) ) |
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88 | help(); |
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89 | |
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90 | size = atoi(argv[optind++]); |
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91 | size = size << 20; |
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92 | |
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93 | if (snprintf(filename, MAX_NAME_LEN, "%s",argv[optind++]) >= |
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94 | MAX_NAME_LEN) { |
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95 | fprintf(stderr,"Device name too long\n"); |
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96 | exit(-1); |
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97 | } |
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98 | |
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99 | if (optind != argc) { |
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100 | /*Backing file argument*/ |
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101 | backed = 1; |
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102 | if (snprintf(bfilename, MAX_NAME_LEN, "%s",argv[optind++]) >= |
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103 | MAX_NAME_LEN) { |
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104 | fprintf(stderr,"Device name too long\n"); |
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105 | exit(-1); |
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106 | } |
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107 | } |
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108 | |
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109 | DFPRINTF("Creating file size %llu, name %s\n",(long long unsigned)size, filename); |
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110 | if (!backed) |
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111 | ret = qcow_create(filename,size,NULL,sparse); |
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112 | else |
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113 | ret = qcow_create(filename,size,bfilename,sparse); |
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114 | |
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115 | if (ret < 0) |
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116 | DPRINTF("Unable to create QCOW file\n"); |
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117 | else |
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118 | DPRINTF("QCOW file successfully created\n"); |
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119 | |
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120 | return 0; |
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121 | } |
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