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1 | 9aebd98a | Stefan Weil | /*
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2 | 9aebd98a | Stefan Weil | * Block driver for the Virtual Disk Image (VDI) format
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3 | 9aebd98a | Stefan Weil | *
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4 | 641543b7 | Stefan Weil | * Copyright (c) 2009, 2012 Stefan Weil
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5 | 9aebd98a | Stefan Weil | *
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6 | 9aebd98a | Stefan Weil | * This program is free software: you can redistribute it and/or modify
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7 | 9aebd98a | Stefan Weil | * it under the terms of the GNU General Public License as published by
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8 | 9aebd98a | Stefan Weil | * the Free Software Foundation, either version 2 of the License, or
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9 | 9aebd98a | Stefan Weil | * (at your option) version 3 or any later version.
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10 | 9aebd98a | Stefan Weil | *
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11 | 9aebd98a | Stefan Weil | * This program is distributed in the hope that it will be useful,
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12 | 9aebd98a | Stefan Weil | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 9aebd98a | Stefan Weil | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | 9aebd98a | Stefan Weil | * GNU General Public License for more details.
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15 | 9aebd98a | Stefan Weil | *
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16 | 9aebd98a | Stefan Weil | * You should have received a copy of the GNU General Public License
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17 | 9aebd98a | Stefan Weil | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 | 9aebd98a | Stefan Weil | *
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19 | 9aebd98a | Stefan Weil | * Reference:
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20 | 9aebd98a | Stefan Weil | * http://forums.virtualbox.org/viewtopic.php?t=8046
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21 | 9aebd98a | Stefan Weil | *
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22 | 9aebd98a | Stefan Weil | * This driver supports create / read / write operations on VDI images.
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23 | 9aebd98a | Stefan Weil | *
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24 | 9aebd98a | Stefan Weil | * Todo (see also TODO in code):
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25 | 9aebd98a | Stefan Weil | *
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26 | 9aebd98a | Stefan Weil | * Some features like snapshots are still missing.
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27 | 9aebd98a | Stefan Weil | *
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28 | 9aebd98a | Stefan Weil | * Deallocation of zero-filled blocks and shrinking images are missing, too
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29 | 9aebd98a | Stefan Weil | * (might be added to common block layer).
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30 | 9aebd98a | Stefan Weil | *
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31 | 9aebd98a | Stefan Weil | * Allocation of blocks could be optimized (less writes to block map and
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32 | 9aebd98a | Stefan Weil | * header).
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33 | 9aebd98a | Stefan Weil | *
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34 | 9aebd98a | Stefan Weil | * Read and write of adjacents blocks could be done in one operation
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35 | 9aebd98a | Stefan Weil | * (current code uses one operation per block (1 MiB).
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36 | 9aebd98a | Stefan Weil | *
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37 | 9aebd98a | Stefan Weil | * The code is not thread safe (missing locks for changes in header and
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38 | 9aebd98a | Stefan Weil | * block table, no problem with current QEMU).
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39 | 9aebd98a | Stefan Weil | *
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40 | 9aebd98a | Stefan Weil | * Hints:
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41 | 9aebd98a | Stefan Weil | *
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42 | 9aebd98a | Stefan Weil | * Blocks (VDI documentation) correspond to clusters (QEMU).
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43 | 9aebd98a | Stefan Weil | * QEMU's backing files could be implemented using VDI snapshot files (TODO).
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44 | 9aebd98a | Stefan Weil | * VDI snapshot files may also contain the complete machine state.
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45 | 9aebd98a | Stefan Weil | * Maybe this machine state can be converted to QEMU PC machine snapshot data.
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46 | 9aebd98a | Stefan Weil | *
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47 | 9aebd98a | Stefan Weil | * The driver keeps a block cache (little endian entries) in memory.
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48 | 9aebd98a | Stefan Weil | * For the standard block size (1 MiB), a 1 TiB disk will use 4 MiB RAM,
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49 | 9aebd98a | Stefan Weil | * so this seems to be reasonable.
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50 | 9aebd98a | Stefan Weil | */
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51 | 9aebd98a | Stefan Weil | |
52 | 9aebd98a | Stefan Weil | #include "qemu-common.h" |
53 | 737e150e | Paolo Bonzini | #include "block/block_int.h" |
54 | 1de7afc9 | Paolo Bonzini | #include "qemu/module.h" |
55 | caf71f86 | Paolo Bonzini | #include "migration/migration.h" |
56 | 9aebd98a | Stefan Weil | |
57 | ee682d27 | Stefan Weil | #if defined(CONFIG_UUID)
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58 | 9aebd98a | Stefan Weil | #include <uuid/uuid.h> |
59 | 9aebd98a | Stefan Weil | #else
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60 | 9aebd98a | Stefan Weil | /* TODO: move uuid emulation to some central place in QEMU. */
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61 | 9c17d615 | Paolo Bonzini | #include "sysemu/sysemu.h" /* UUID_FMT */ |
62 | 9aebd98a | Stefan Weil | typedef unsigned char uuid_t[16]; |
63 | 9aebd98a | Stefan Weil | #endif
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64 | 9aebd98a | Stefan Weil | |
65 | 9aebd98a | Stefan Weil | /* Code configuration options. */
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66 | 9aebd98a | Stefan Weil | |
67 | 9aebd98a | Stefan Weil | /* Enable debug messages. */
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68 | 9aebd98a | Stefan Weil | //~ #define CONFIG_VDI_DEBUG
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69 | 9aebd98a | Stefan Weil | |
70 | 9aebd98a | Stefan Weil | /* Support write operations on VDI images. */
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71 | 9aebd98a | Stefan Weil | #define CONFIG_VDI_WRITE
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72 | 9aebd98a | Stefan Weil | |
73 | 9aebd98a | Stefan Weil | /* Support non-standard block (cluster) size. This is untested.
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74 | 9aebd98a | Stefan Weil | * Maybe it will be needed for very large images.
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75 | 9aebd98a | Stefan Weil | */
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76 | 9aebd98a | Stefan Weil | //~ #define CONFIG_VDI_BLOCK_SIZE
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77 | 9aebd98a | Stefan Weil | |
78 | 9aebd98a | Stefan Weil | /* Support static (fixed, pre-allocated) images. */
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79 | 9aebd98a | Stefan Weil | #define CONFIG_VDI_STATIC_IMAGE
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80 | 9aebd98a | Stefan Weil | |
81 | 9aebd98a | Stefan Weil | /* Command line option for static images. */
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82 | 9aebd98a | Stefan Weil | #define BLOCK_OPT_STATIC "static" |
83 | 9aebd98a | Stefan Weil | |
84 | 9aebd98a | Stefan Weil | #define KiB 1024 |
85 | 9aebd98a | Stefan Weil | #define MiB (KiB * KiB)
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86 | 9aebd98a | Stefan Weil | |
87 | 9aebd98a | Stefan Weil | #define SECTOR_SIZE 512 |
88 | 99cce9fa | Kevin Wolf | #define DEFAULT_CLUSTER_SIZE (1 * MiB) |
89 | 9aebd98a | Stefan Weil | |
90 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
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91 | 9aebd98a | Stefan Weil | #define logout(fmt, ...) \
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92 | 9aebd98a | Stefan Weil | fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__) |
93 | 9aebd98a | Stefan Weil | #else
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94 | 9aebd98a | Stefan Weil | #define logout(fmt, ...) ((void)0) |
95 | 9aebd98a | Stefan Weil | #endif
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96 | 9aebd98a | Stefan Weil | |
97 | 9aebd98a | Stefan Weil | /* Image signature. */
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98 | 9aebd98a | Stefan Weil | #define VDI_SIGNATURE 0xbeda107f |
99 | 9aebd98a | Stefan Weil | |
100 | 9aebd98a | Stefan Weil | /* Image version. */
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101 | 9aebd98a | Stefan Weil | #define VDI_VERSION_1_1 0x00010001 |
102 | 9aebd98a | Stefan Weil | |
103 | 9aebd98a | Stefan Weil | /* Image type. */
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104 | 9aebd98a | Stefan Weil | #define VDI_TYPE_DYNAMIC 1 |
105 | 9aebd98a | Stefan Weil | #define VDI_TYPE_STATIC 2 |
106 | 9aebd98a | Stefan Weil | |
107 | 9aebd98a | Stefan Weil | /* Innotek / SUN images use these strings in header.text:
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108 | 9aebd98a | Stefan Weil | * "<<< innotek VirtualBox Disk Image >>>\n"
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109 | 9aebd98a | Stefan Weil | * "<<< Sun xVM VirtualBox Disk Image >>>\n"
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110 | 9aebd98a | Stefan Weil | * "<<< Sun VirtualBox Disk Image >>>\n"
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111 | 9aebd98a | Stefan Weil | * The value does not matter, so QEMU created images use a different text.
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112 | 9aebd98a | Stefan Weil | */
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113 | 9aebd98a | Stefan Weil | #define VDI_TEXT "<<< QEMU VM Virtual Disk Image >>>\n" |
114 | 9aebd98a | Stefan Weil | |
115 | c794b4e0 | Eric Sunshine | /* A never-allocated block; semantically arbitrary content. */
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116 | c794b4e0 | Eric Sunshine | #define VDI_UNALLOCATED 0xffffffffU |
117 | c794b4e0 | Eric Sunshine | |
118 | c794b4e0 | Eric Sunshine | /* A discarded (no longer allocated) block; semantically zero-filled. */
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119 | c794b4e0 | Eric Sunshine | #define VDI_DISCARDED 0xfffffffeU |
120 | c794b4e0 | Eric Sunshine | |
121 | c794b4e0 | Eric Sunshine | #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED)
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122 | 9aebd98a | Stefan Weil | |
123 | ee682d27 | Stefan Weil | #if !defined(CONFIG_UUID)
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124 | 8ba2aae3 | Stefan Hajnoczi | static inline void uuid_generate(uuid_t out) |
125 | 9aebd98a | Stefan Weil | { |
126 | 4f3669ea | Stefan Weil | memset(out, 0, sizeof(uuid_t)); |
127 | 9aebd98a | Stefan Weil | } |
128 | 9aebd98a | Stefan Weil | |
129 | 8ba2aae3 | Stefan Hajnoczi | static inline int uuid_is_null(const uuid_t uu) |
130 | 9aebd98a | Stefan Weil | { |
131 | 9aebd98a | Stefan Weil | uuid_t null_uuid = { 0 };
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132 | 4f3669ea | Stefan Weil | return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0; |
133 | 9aebd98a | Stefan Weil | } |
134 | 9aebd98a | Stefan Weil | |
135 | 8ba2aae3 | Stefan Hajnoczi | static inline void uuid_unparse(const uuid_t uu, char *out) |
136 | 9aebd98a | Stefan Weil | { |
137 | 9aebd98a | Stefan Weil | snprintf(out, 37, UUID_FMT,
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138 | 9aebd98a | Stefan Weil | uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7], |
139 | 9aebd98a | Stefan Weil | uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]); |
140 | 9aebd98a | Stefan Weil | } |
141 | 9aebd98a | Stefan Weil | #endif
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142 | 9aebd98a | Stefan Weil | |
143 | 9aebd98a | Stefan Weil | typedef struct { |
144 | 9aebd98a | Stefan Weil | char text[0x40]; |
145 | 9aebd98a | Stefan Weil | uint32_t signature; |
146 | 9aebd98a | Stefan Weil | uint32_t version; |
147 | 9aebd98a | Stefan Weil | uint32_t header_size; |
148 | 9aebd98a | Stefan Weil | uint32_t image_type; |
149 | 9aebd98a | Stefan Weil | uint32_t image_flags; |
150 | 9aebd98a | Stefan Weil | char description[256]; |
151 | 9aebd98a | Stefan Weil | uint32_t offset_bmap; |
152 | 9aebd98a | Stefan Weil | uint32_t offset_data; |
153 | 9aebd98a | Stefan Weil | uint32_t cylinders; /* disk geometry, unused here */
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154 | 9aebd98a | Stefan Weil | uint32_t heads; /* disk geometry, unused here */
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155 | 9aebd98a | Stefan Weil | uint32_t sectors; /* disk geometry, unused here */
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156 | 9aebd98a | Stefan Weil | uint32_t sector_size; |
157 | 9aebd98a | Stefan Weil | uint32_t unused1; |
158 | 9aebd98a | Stefan Weil | uint64_t disk_size; |
159 | 9aebd98a | Stefan Weil | uint32_t block_size; |
160 | 9aebd98a | Stefan Weil | uint32_t block_extra; /* unused here */
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161 | 9aebd98a | Stefan Weil | uint32_t blocks_in_image; |
162 | 9aebd98a | Stefan Weil | uint32_t blocks_allocated; |
163 | 9aebd98a | Stefan Weil | uuid_t uuid_image; |
164 | 9aebd98a | Stefan Weil | uuid_t uuid_last_snap; |
165 | 9aebd98a | Stefan Weil | uuid_t uuid_link; |
166 | 9aebd98a | Stefan Weil | uuid_t uuid_parent; |
167 | 9aebd98a | Stefan Weil | uint64_t unused2[7];
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168 | 9aebd98a | Stefan Weil | } VdiHeader; |
169 | 9aebd98a | Stefan Weil | |
170 | 9aebd98a | Stefan Weil | typedef struct { |
171 | 9aebd98a | Stefan Weil | /* The block map entries are little endian (even in memory). */
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172 | 9aebd98a | Stefan Weil | uint32_t *bmap; |
173 | 9aebd98a | Stefan Weil | /* Size of block (bytes). */
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174 | 9aebd98a | Stefan Weil | uint32_t block_size; |
175 | 9aebd98a | Stefan Weil | /* Size of block (sectors). */
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176 | 9aebd98a | Stefan Weil | uint32_t block_sectors; |
177 | 9aebd98a | Stefan Weil | /* First sector of block map. */
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178 | 9aebd98a | Stefan Weil | uint32_t bmap_sector; |
179 | 4ff9786c | Stefan Weil | /* VDI header (converted to host endianness). */
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180 | 9aebd98a | Stefan Weil | VdiHeader header; |
181 | fc9d106c | Kevin Wolf | |
182 | fc9d106c | Kevin Wolf | Error *migration_blocker; |
183 | 9aebd98a | Stefan Weil | } BDRVVdiState; |
184 | 9aebd98a | Stefan Weil | |
185 | 9aebd98a | Stefan Weil | /* Change UUID from little endian (IPRT = VirtualBox format) to big endian
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186 | 9aebd98a | Stefan Weil | * format (network byte order, standard, see RFC 4122) and vice versa.
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187 | 9aebd98a | Stefan Weil | */
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188 | 9aebd98a | Stefan Weil | static void uuid_convert(uuid_t uuid) |
189 | 9aebd98a | Stefan Weil | { |
190 | 9aebd98a | Stefan Weil | bswap32s((uint32_t *)&uuid[0]);
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191 | 9aebd98a | Stefan Weil | bswap16s((uint16_t *)&uuid[4]);
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192 | 9aebd98a | Stefan Weil | bswap16s((uint16_t *)&uuid[6]);
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193 | 9aebd98a | Stefan Weil | } |
194 | 9aebd98a | Stefan Weil | |
195 | 9aebd98a | Stefan Weil | static void vdi_header_to_cpu(VdiHeader *header) |
196 | 9aebd98a | Stefan Weil | { |
197 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->signature); |
198 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->version); |
199 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->header_size); |
200 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->image_type); |
201 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->image_flags); |
202 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->offset_bmap); |
203 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->offset_data); |
204 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->cylinders); |
205 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->heads); |
206 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->sectors); |
207 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->sector_size); |
208 | 9aebd98a | Stefan Weil | le64_to_cpus(&header->disk_size); |
209 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->block_size); |
210 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->block_extra); |
211 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->blocks_in_image); |
212 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->blocks_allocated); |
213 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_image); |
214 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_last_snap); |
215 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_link); |
216 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_parent); |
217 | 9aebd98a | Stefan Weil | } |
218 | 9aebd98a | Stefan Weil | |
219 | 9aebd98a | Stefan Weil | static void vdi_header_to_le(VdiHeader *header) |
220 | 9aebd98a | Stefan Weil | { |
221 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->signature); |
222 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->version); |
223 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->header_size); |
224 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->image_type); |
225 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->image_flags); |
226 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->offset_bmap); |
227 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->offset_data); |
228 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->cylinders); |
229 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->heads); |
230 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->sectors); |
231 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->sector_size); |
232 | 9aebd98a | Stefan Weil | cpu_to_le64s(&header->disk_size); |
233 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->block_size); |
234 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->block_extra); |
235 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_in_image); |
236 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_allocated); |
237 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_allocated); |
238 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_image); |
239 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_last_snap); |
240 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_link); |
241 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_parent); |
242 | 9aebd98a | Stefan Weil | } |
243 | 9aebd98a | Stefan Weil | |
244 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
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245 | 9aebd98a | Stefan Weil | static void vdi_header_print(VdiHeader *header) |
246 | 9aebd98a | Stefan Weil | { |
247 | 9aebd98a | Stefan Weil | char uuid[37]; |
248 | 9aebd98a | Stefan Weil | logout("text %s", header->text);
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249 | 9f0470bb | Stefan Weil | logout("signature 0x%08x\n", header->signature);
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250 | 9aebd98a | Stefan Weil | logout("header size 0x%04x\n", header->header_size);
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251 | 9aebd98a | Stefan Weil | logout("image type 0x%04x\n", header->image_type);
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252 | 9aebd98a | Stefan Weil | logout("image flags 0x%04x\n", header->image_flags);
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253 | 9aebd98a | Stefan Weil | logout("description %s\n", header->description);
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254 | 9aebd98a | Stefan Weil | logout("offset bmap 0x%04x\n", header->offset_bmap);
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255 | 9aebd98a | Stefan Weil | logout("offset data 0x%04x\n", header->offset_data);
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256 | 9aebd98a | Stefan Weil | logout("cylinders 0x%04x\n", header->cylinders);
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257 | 9aebd98a | Stefan Weil | logout("heads 0x%04x\n", header->heads);
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258 | 9aebd98a | Stefan Weil | logout("sectors 0x%04x\n", header->sectors);
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259 | 9aebd98a | Stefan Weil | logout("sector size 0x%04x\n", header->sector_size);
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260 | 9aebd98a | Stefan Weil | logout("image size 0x%" PRIx64 " B (%" PRIu64 " MiB)\n", |
261 | 9aebd98a | Stefan Weil | header->disk_size, header->disk_size / MiB); |
262 | 9aebd98a | Stefan Weil | logout("block size 0x%04x\n", header->block_size);
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263 | 9aebd98a | Stefan Weil | logout("block extra 0x%04x\n", header->block_extra);
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264 | 9aebd98a | Stefan Weil | logout("blocks tot. 0x%04x\n", header->blocks_in_image);
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265 | 9aebd98a | Stefan Weil | logout("blocks all. 0x%04x\n", header->blocks_allocated);
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266 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_image, uuid); |
267 | 9aebd98a | Stefan Weil | logout("uuid image %s\n", uuid);
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268 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_last_snap, uuid); |
269 | 9aebd98a | Stefan Weil | logout("uuid snap %s\n", uuid);
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270 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_link, uuid); |
271 | 9aebd98a | Stefan Weil | logout("uuid link %s\n", uuid);
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272 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_parent, uuid); |
273 | 9aebd98a | Stefan Weil | logout("uuid parent %s\n", uuid);
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274 | 9aebd98a | Stefan Weil | } |
275 | 9aebd98a | Stefan Weil | #endif
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276 | 9aebd98a | Stefan Weil | |
277 | 4534ff54 | Kevin Wolf | static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res, |
278 | 4534ff54 | Kevin Wolf | BdrvCheckMode fix) |
279 | 9aebd98a | Stefan Weil | { |
280 | 9aebd98a | Stefan Weil | /* TODO: additional checks possible. */
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281 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
282 | 9aebd98a | Stefan Weil | uint32_t blocks_allocated = 0;
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283 | 9aebd98a | Stefan Weil | uint32_t block; |
284 | 9aebd98a | Stefan Weil | uint32_t *bmap; |
285 | 9aebd98a | Stefan Weil | logout("\n");
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286 | 9aebd98a | Stefan Weil | |
287 | 4534ff54 | Kevin Wolf | if (fix) {
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288 | 4534ff54 | Kevin Wolf | return -ENOTSUP;
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289 | 4534ff54 | Kevin Wolf | } |
290 | 4534ff54 | Kevin Wolf | |
291 | 7267c094 | Anthony Liguori | bmap = g_malloc(s->header.blocks_in_image * sizeof(uint32_t));
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292 | 9aebd98a | Stefan Weil | memset(bmap, 0xff, s->header.blocks_in_image * sizeof(uint32_t)); |
293 | 9aebd98a | Stefan Weil | |
294 | 9aebd98a | Stefan Weil | /* Check block map and value of blocks_allocated. */
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295 | 9aebd98a | Stefan Weil | for (block = 0; block < s->header.blocks_in_image; block++) { |
296 | 9aebd98a | Stefan Weil | uint32_t bmap_entry = le32_to_cpu(s->bmap[block]); |
297 | c794b4e0 | Eric Sunshine | if (VDI_IS_ALLOCATED(bmap_entry)) {
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298 | 9aebd98a | Stefan Weil | if (bmap_entry < s->header.blocks_in_image) {
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299 | 9aebd98a | Stefan Weil | blocks_allocated++; |
300 | c794b4e0 | Eric Sunshine | if (!VDI_IS_ALLOCATED(bmap[bmap_entry])) {
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301 | 9aebd98a | Stefan Weil | bmap[bmap_entry] = bmap_entry; |
302 | 9aebd98a | Stefan Weil | } else {
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303 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: block index %" PRIu32
|
304 | 9aebd98a | Stefan Weil | " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); |
305 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
306 | 9aebd98a | Stefan Weil | } |
307 | 9aebd98a | Stefan Weil | } else {
|
308 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: block index %" PRIu32
|
309 | 9aebd98a | Stefan Weil | " too large, is %" PRIu32 "\n", block, bmap_entry); |
310 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
311 | 9aebd98a | Stefan Weil | } |
312 | 9aebd98a | Stefan Weil | } |
313 | 9aebd98a | Stefan Weil | } |
314 | 9aebd98a | Stefan Weil | if (blocks_allocated != s->header.blocks_allocated) {
|
315 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32
|
316 | 9aebd98a | Stefan Weil | ", should be %" PRIu32 "\n", |
317 | 9aebd98a | Stefan Weil | blocks_allocated, s->header.blocks_allocated); |
318 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
319 | 9aebd98a | Stefan Weil | } |
320 | 9aebd98a | Stefan Weil | |
321 | 7267c094 | Anthony Liguori | g_free(bmap); |
322 | 9aebd98a | Stefan Weil | |
323 | 9ac228e0 | Kevin Wolf | return 0; |
324 | 9aebd98a | Stefan Weil | } |
325 | 9aebd98a | Stefan Weil | |
326 | 9aebd98a | Stefan Weil | static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
327 | 9aebd98a | Stefan Weil | { |
328 | 9aebd98a | Stefan Weil | /* TODO: vdi_get_info would be needed for machine snapshots.
|
329 | 9aebd98a | Stefan Weil | vm_state_offset is still missing. */
|
330 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
331 | 9aebd98a | Stefan Weil | logout("\n");
|
332 | 9aebd98a | Stefan Weil | bdi->cluster_size = s->block_size; |
333 | 9aebd98a | Stefan Weil | bdi->vm_state_offset = 0;
|
334 | 9aebd98a | Stefan Weil | return 0; |
335 | 9aebd98a | Stefan Weil | } |
336 | 9aebd98a | Stefan Weil | |
337 | 9aebd98a | Stefan Weil | static int vdi_make_empty(BlockDriverState *bs) |
338 | 9aebd98a | Stefan Weil | { |
339 | 9aebd98a | Stefan Weil | /* TODO: missing code. */
|
340 | 9aebd98a | Stefan Weil | logout("\n");
|
341 | 9aebd98a | Stefan Weil | /* The return value for missing code must be 0, see block.c. */
|
342 | 9aebd98a | Stefan Weil | return 0; |
343 | 9aebd98a | Stefan Weil | } |
344 | 9aebd98a | Stefan Weil | |
345 | 9aebd98a | Stefan Weil | static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename) |
346 | 9aebd98a | Stefan Weil | { |
347 | 9aebd98a | Stefan Weil | const VdiHeader *header = (const VdiHeader *)buf; |
348 | 9aebd98a | Stefan Weil | int result = 0; |
349 | 9aebd98a | Stefan Weil | |
350 | 9aebd98a | Stefan Weil | logout("\n");
|
351 | 9aebd98a | Stefan Weil | |
352 | 9aebd98a | Stefan Weil | if (buf_size < sizeof(*header)) { |
353 | 9aebd98a | Stefan Weil | /* Header too small, no VDI. */
|
354 | 9aebd98a | Stefan Weil | } else if (le32_to_cpu(header->signature) == VDI_SIGNATURE) { |
355 | 9aebd98a | Stefan Weil | result = 100;
|
356 | 9aebd98a | Stefan Weil | } |
357 | 9aebd98a | Stefan Weil | |
358 | 9aebd98a | Stefan Weil | if (result == 0) { |
359 | 9aebd98a | Stefan Weil | logout("no vdi image\n");
|
360 | 9aebd98a | Stefan Weil | } else {
|
361 | 9aebd98a | Stefan Weil | logout("%s", header->text);
|
362 | 9aebd98a | Stefan Weil | } |
363 | 9aebd98a | Stefan Weil | |
364 | 9aebd98a | Stefan Weil | return result;
|
365 | 9aebd98a | Stefan Weil | } |
366 | 9aebd98a | Stefan Weil | |
367 | 1a86938f | Kevin Wolf | static int vdi_open(BlockDriverState *bs, QDict *options, int flags) |
368 | 9aebd98a | Stefan Weil | { |
369 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
370 | 9aebd98a | Stefan Weil | VdiHeader header; |
371 | 9aebd98a | Stefan Weil | size_t bmap_size; |
372 | 8937f822 | Stefan Weil | int ret;
|
373 | 9aebd98a | Stefan Weil | |
374 | 9aebd98a | Stefan Weil | logout("\n");
|
375 | 9aebd98a | Stefan Weil | |
376 | 8937f822 | Stefan Weil | ret = bdrv_read(bs->file, 0, (uint8_t *)&header, 1); |
377 | 8937f822 | Stefan Weil | if (ret < 0) { |
378 | 9aebd98a | Stefan Weil | goto fail;
|
379 | 9aebd98a | Stefan Weil | } |
380 | 9aebd98a | Stefan Weil | |
381 | 9aebd98a | Stefan Weil | vdi_header_to_cpu(&header); |
382 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
|
383 | 9aebd98a | Stefan Weil | vdi_header_print(&header); |
384 | 9aebd98a | Stefan Weil | #endif
|
385 | 9aebd98a | Stefan Weil | |
386 | f21dc3a4 | Stefan Weil | if (header.disk_size % SECTOR_SIZE != 0) { |
387 | f21dc3a4 | Stefan Weil | /* 'VBoxManage convertfromraw' can create images with odd disk sizes.
|
388 | f21dc3a4 | Stefan Weil | We accept them but round the disk size to the next multiple of
|
389 | f21dc3a4 | Stefan Weil | SECTOR_SIZE. */
|
390 | f21dc3a4 | Stefan Weil | logout("odd disk size %" PRIu64 " B, round up\n", header.disk_size); |
391 | f21dc3a4 | Stefan Weil | header.disk_size += SECTOR_SIZE - 1;
|
392 | f21dc3a4 | Stefan Weil | header.disk_size &= ~(SECTOR_SIZE - 1);
|
393 | f21dc3a4 | Stefan Weil | } |
394 | f21dc3a4 | Stefan Weil | |
395 | 0e87ba2c | Stefan Weil | if (header.signature != VDI_SIGNATURE) {
|
396 | 0e87ba2c | Stefan Weil | logout("bad vdi signature %08x\n", header.signature);
|
397 | 0e87ba2c | Stefan Weil | ret = -EMEDIUMTYPE; |
398 | 0e87ba2c | Stefan Weil | goto fail;
|
399 | 0e87ba2c | Stefan Weil | } else if (header.version != VDI_VERSION_1_1) { |
400 | 9aebd98a | Stefan Weil | logout("unsupported version %u.%u\n",
|
401 | 9aebd98a | Stefan Weil | header.version >> 16, header.version & 0xffff); |
402 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
403 | 9aebd98a | Stefan Weil | goto fail;
|
404 | 9aebd98a | Stefan Weil | } else if (header.offset_bmap % SECTOR_SIZE != 0) { |
405 | 9aebd98a | Stefan Weil | /* We only support block maps which start on a sector boundary. */
|
406 | 9aebd98a | Stefan Weil | logout("unsupported block map offset 0x%x B\n", header.offset_bmap);
|
407 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
408 | 9aebd98a | Stefan Weil | goto fail;
|
409 | 9aebd98a | Stefan Weil | } else if (header.offset_data % SECTOR_SIZE != 0) { |
410 | 9aebd98a | Stefan Weil | /* We only support data blocks which start on a sector boundary. */
|
411 | 9aebd98a | Stefan Weil | logout("unsupported data offset 0x%x B\n", header.offset_data);
|
412 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
413 | 9aebd98a | Stefan Weil | goto fail;
|
414 | 9aebd98a | Stefan Weil | } else if (header.sector_size != SECTOR_SIZE) { |
415 | 9aebd98a | Stefan Weil | logout("unsupported sector size %u B\n", header.sector_size);
|
416 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
417 | 9aebd98a | Stefan Weil | goto fail;
|
418 | 9aebd98a | Stefan Weil | } else if (header.block_size != 1 * MiB) { |
419 | 9aebd98a | Stefan Weil | logout("unsupported block size %u B\n", header.block_size);
|
420 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
421 | 9aebd98a | Stefan Weil | goto fail;
|
422 | f21dc3a4 | Stefan Weil | } else if (header.disk_size > |
423 | f21dc3a4 | Stefan Weil | (uint64_t)header.blocks_in_image * header.block_size) { |
424 | f21dc3a4 | Stefan Weil | logout("unsupported disk size %" PRIu64 " B\n", header.disk_size); |
425 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
426 | 9aebd98a | Stefan Weil | goto fail;
|
427 | 9aebd98a | Stefan Weil | } else if (!uuid_is_null(header.uuid_link)) { |
428 | 9aebd98a | Stefan Weil | logout("link uuid != 0, unsupported\n");
|
429 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
430 | 9aebd98a | Stefan Weil | goto fail;
|
431 | 9aebd98a | Stefan Weil | } else if (!uuid_is_null(header.uuid_parent)) { |
432 | 9aebd98a | Stefan Weil | logout("parent uuid != 0, unsupported\n");
|
433 | 8937f822 | Stefan Weil | ret = -ENOTSUP; |
434 | 9aebd98a | Stefan Weil | goto fail;
|
435 | 9aebd98a | Stefan Weil | } |
436 | 9aebd98a | Stefan Weil | |
437 | 9aebd98a | Stefan Weil | bs->total_sectors = header.disk_size / SECTOR_SIZE; |
438 | 9aebd98a | Stefan Weil | |
439 | 9aebd98a | Stefan Weil | s->block_size = header.block_size; |
440 | 9aebd98a | Stefan Weil | s->block_sectors = header.block_size / SECTOR_SIZE; |
441 | 9aebd98a | Stefan Weil | s->bmap_sector = header.offset_bmap / SECTOR_SIZE; |
442 | 9aebd98a | Stefan Weil | s->header = header; |
443 | 9aebd98a | Stefan Weil | |
444 | 9aebd98a | Stefan Weil | bmap_size = header.blocks_in_image * sizeof(uint32_t);
|
445 | 6eea90eb | Stefan Weil | bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
|
446 | 6528499f | Markus Armbruster | s->bmap = g_malloc(bmap_size * SECTOR_SIZE); |
447 | 8937f822 | Stefan Weil | ret = bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size); |
448 | 8937f822 | Stefan Weil | if (ret < 0) { |
449 | 9aebd98a | Stefan Weil | goto fail_free_bmap;
|
450 | 9aebd98a | Stefan Weil | } |
451 | 9aebd98a | Stefan Weil | |
452 | fc9d106c | Kevin Wolf | /* Disable migration when vdi images are used */
|
453 | fc9d106c | Kevin Wolf | error_set(&s->migration_blocker, |
454 | fc9d106c | Kevin Wolf | QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, |
455 | fc9d106c | Kevin Wolf | "vdi", bs->device_name, "live migration"); |
456 | fc9d106c | Kevin Wolf | migrate_add_blocker(s->migration_blocker); |
457 | fc9d106c | Kevin Wolf | |
458 | 9aebd98a | Stefan Weil | return 0; |
459 | 9aebd98a | Stefan Weil | |
460 | 9aebd98a | Stefan Weil | fail_free_bmap:
|
461 | 7267c094 | Anthony Liguori | g_free(s->bmap); |
462 | 9aebd98a | Stefan Weil | |
463 | 9aebd98a | Stefan Weil | fail:
|
464 | 8937f822 | Stefan Weil | return ret;
|
465 | 9aebd98a | Stefan Weil | } |
466 | 9aebd98a | Stefan Weil | |
467 | ecfe2bba | Jeff Cody | static int vdi_reopen_prepare(BDRVReopenState *state, |
468 | ecfe2bba | Jeff Cody | BlockReopenQueue *queue, Error **errp) |
469 | ecfe2bba | Jeff Cody | { |
470 | ecfe2bba | Jeff Cody | return 0; |
471 | ecfe2bba | Jeff Cody | } |
472 | ecfe2bba | Jeff Cody | |
473 | e850b35a | Stefan Hajnoczi | static int coroutine_fn vdi_co_is_allocated(BlockDriverState *bs, |
474 | e850b35a | Stefan Hajnoczi | int64_t sector_num, int nb_sectors, int *pnum) |
475 | 9aebd98a | Stefan Weil | { |
476 | 9aebd98a | Stefan Weil | /* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */
|
477 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
478 | 9aebd98a | Stefan Weil | size_t bmap_index = sector_num / s->block_sectors; |
479 | 9aebd98a | Stefan Weil | size_t sector_in_block = sector_num % s->block_sectors; |
480 | 9aebd98a | Stefan Weil | int n_sectors = s->block_sectors - sector_in_block;
|
481 | 9aebd98a | Stefan Weil | uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]); |
482 | 9aebd98a | Stefan Weil | logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum); |
483 | 9aebd98a | Stefan Weil | if (n_sectors > nb_sectors) {
|
484 | 9aebd98a | Stefan Weil | n_sectors = nb_sectors; |
485 | 9aebd98a | Stefan Weil | } |
486 | 9aebd98a | Stefan Weil | *pnum = n_sectors; |
487 | c794b4e0 | Eric Sunshine | return VDI_IS_ALLOCATED(bmap_entry);
|
488 | 9aebd98a | Stefan Weil | } |
489 | 9aebd98a | Stefan Weil | |
490 | a7a43aa1 | Paolo Bonzini | static int vdi_co_read(BlockDriverState *bs, |
491 | a7a43aa1 | Paolo Bonzini | int64_t sector_num, uint8_t *buf, int nb_sectors)
|
492 | 9aebd98a | Stefan Weil | { |
493 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
494 | 9aebd98a | Stefan Weil | uint32_t bmap_entry; |
495 | 9aebd98a | Stefan Weil | uint32_t block_index; |
496 | 9aebd98a | Stefan Weil | uint32_t sector_in_block; |
497 | 9aebd98a | Stefan Weil | uint32_t n_sectors; |
498 | eb9566d1 | Paolo Bonzini | int ret = 0; |
499 | 4de659e8 | Paolo Bonzini | |
500 | 4de659e8 | Paolo Bonzini | logout("\n");
|
501 | 9aebd98a | Stefan Weil | |
502 | eb9566d1 | Paolo Bonzini | while (ret >= 0 && nb_sectors > 0) { |
503 | eb9566d1 | Paolo Bonzini | block_index = sector_num / s->block_sectors; |
504 | eb9566d1 | Paolo Bonzini | sector_in_block = sector_num % s->block_sectors; |
505 | eb9566d1 | Paolo Bonzini | n_sectors = s->block_sectors - sector_in_block; |
506 | eb9566d1 | Paolo Bonzini | if (n_sectors > nb_sectors) {
|
507 | eb9566d1 | Paolo Bonzini | n_sectors = nb_sectors; |
508 | eb9566d1 | Paolo Bonzini | } |
509 | 0c7bfc32 | Paolo Bonzini | |
510 | eb9566d1 | Paolo Bonzini | logout("will read %u sectors starting at sector %" PRIu64 "\n", |
511 | eb9566d1 | Paolo Bonzini | n_sectors, sector_num); |
512 | eb9566d1 | Paolo Bonzini | |
513 | eb9566d1 | Paolo Bonzini | /* prepare next AIO request */
|
514 | eb9566d1 | Paolo Bonzini | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
515 | eb9566d1 | Paolo Bonzini | if (!VDI_IS_ALLOCATED(bmap_entry)) {
|
516 | eb9566d1 | Paolo Bonzini | /* Block not allocated, return zeros, no need to wait. */
|
517 | eb9566d1 | Paolo Bonzini | memset(buf, 0, n_sectors * SECTOR_SIZE);
|
518 | eb9566d1 | Paolo Bonzini | ret = 0;
|
519 | eb9566d1 | Paolo Bonzini | } else {
|
520 | eb9566d1 | Paolo Bonzini | uint64_t offset = s->header.offset_data / SECTOR_SIZE + |
521 | eb9566d1 | Paolo Bonzini | (uint64_t)bmap_entry * s->block_sectors + |
522 | eb9566d1 | Paolo Bonzini | sector_in_block; |
523 | eb9566d1 | Paolo Bonzini | ret = bdrv_read(bs->file, offset, buf, n_sectors); |
524 | eb9566d1 | Paolo Bonzini | } |
525 | eb9566d1 | Paolo Bonzini | logout("%u sectors read\n", n_sectors);
|
526 | 0c7bfc32 | Paolo Bonzini | |
527 | eb9566d1 | Paolo Bonzini | nb_sectors -= n_sectors; |
528 | eb9566d1 | Paolo Bonzini | sector_num += n_sectors; |
529 | eb9566d1 | Paolo Bonzini | buf += n_sectors * SECTOR_SIZE; |
530 | 9aebd98a | Stefan Weil | } |
531 | 3d46a75a | Paolo Bonzini | |
532 | 3d46a75a | Paolo Bonzini | return ret;
|
533 | 9aebd98a | Stefan Weil | } |
534 | 9aebd98a | Stefan Weil | |
535 | a7a43aa1 | Paolo Bonzini | static int vdi_co_write(BlockDriverState *bs, |
536 | a7a43aa1 | Paolo Bonzini | int64_t sector_num, const uint8_t *buf, int nb_sectors) |
537 | 9aebd98a | Stefan Weil | { |
538 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
539 | 9aebd98a | Stefan Weil | uint32_t bmap_entry; |
540 | 9aebd98a | Stefan Weil | uint32_t block_index; |
541 | 9aebd98a | Stefan Weil | uint32_t sector_in_block; |
542 | 9aebd98a | Stefan Weil | uint32_t n_sectors; |
543 | bfc45fc1 | Paolo Bonzini | uint32_t bmap_first = VDI_UNALLOCATED; |
544 | bfc45fc1 | Paolo Bonzini | uint32_t bmap_last = VDI_UNALLOCATED; |
545 | bfc45fc1 | Paolo Bonzini | uint8_t *block = NULL;
|
546 | eb9566d1 | Paolo Bonzini | int ret = 0; |
547 | 4de659e8 | Paolo Bonzini | |
548 | 4de659e8 | Paolo Bonzini | logout("\n");
|
549 | 9aebd98a | Stefan Weil | |
550 | eb9566d1 | Paolo Bonzini | while (ret >= 0 && nb_sectors > 0) { |
551 | eb9566d1 | Paolo Bonzini | block_index = sector_num / s->block_sectors; |
552 | eb9566d1 | Paolo Bonzini | sector_in_block = sector_num % s->block_sectors; |
553 | eb9566d1 | Paolo Bonzini | n_sectors = s->block_sectors - sector_in_block; |
554 | eb9566d1 | Paolo Bonzini | if (n_sectors > nb_sectors) {
|
555 | eb9566d1 | Paolo Bonzini | n_sectors = nb_sectors; |
556 | eb9566d1 | Paolo Bonzini | } |
557 | 9aebd98a | Stefan Weil | |
558 | eb9566d1 | Paolo Bonzini | logout("will write %u sectors starting at sector %" PRIu64 "\n", |
559 | eb9566d1 | Paolo Bonzini | n_sectors, sector_num); |
560 | eb9566d1 | Paolo Bonzini | |
561 | eb9566d1 | Paolo Bonzini | /* prepare next AIO request */
|
562 | eb9566d1 | Paolo Bonzini | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
563 | eb9566d1 | Paolo Bonzini | if (!VDI_IS_ALLOCATED(bmap_entry)) {
|
564 | eb9566d1 | Paolo Bonzini | /* Allocate new block and write to it. */
|
565 | eb9566d1 | Paolo Bonzini | uint64_t offset; |
566 | eb9566d1 | Paolo Bonzini | bmap_entry = s->header.blocks_allocated; |
567 | eb9566d1 | Paolo Bonzini | s->bmap[block_index] = cpu_to_le32(bmap_entry); |
568 | eb9566d1 | Paolo Bonzini | s->header.blocks_allocated++; |
569 | eb9566d1 | Paolo Bonzini | offset = s->header.offset_data / SECTOR_SIZE + |
570 | eb9566d1 | Paolo Bonzini | (uint64_t)bmap_entry * s->block_sectors; |
571 | eb9566d1 | Paolo Bonzini | if (block == NULL) { |
572 | eb9566d1 | Paolo Bonzini | block = g_malloc(s->block_size); |
573 | eb9566d1 | Paolo Bonzini | bmap_first = block_index; |
574 | eb9566d1 | Paolo Bonzini | } |
575 | eb9566d1 | Paolo Bonzini | bmap_last = block_index; |
576 | eb9566d1 | Paolo Bonzini | /* Copy data to be written to new block and zero unused parts. */
|
577 | eb9566d1 | Paolo Bonzini | memset(block, 0, sector_in_block * SECTOR_SIZE);
|
578 | eb9566d1 | Paolo Bonzini | memcpy(block + sector_in_block * SECTOR_SIZE, |
579 | eb9566d1 | Paolo Bonzini | buf, n_sectors * SECTOR_SIZE); |
580 | eb9566d1 | Paolo Bonzini | memset(block + (sector_in_block + n_sectors) * SECTOR_SIZE, 0,
|
581 | eb9566d1 | Paolo Bonzini | (s->block_sectors - n_sectors - sector_in_block) * SECTOR_SIZE); |
582 | eb9566d1 | Paolo Bonzini | ret = bdrv_write(bs->file, offset, block, s->block_sectors); |
583 | eb9566d1 | Paolo Bonzini | } else {
|
584 | eb9566d1 | Paolo Bonzini | uint64_t offset = s->header.offset_data / SECTOR_SIZE + |
585 | eb9566d1 | Paolo Bonzini | (uint64_t)bmap_entry * s->block_sectors + |
586 | eb9566d1 | Paolo Bonzini | sector_in_block; |
587 | eb9566d1 | Paolo Bonzini | ret = bdrv_write(bs->file, offset, buf, n_sectors); |
588 | 9aebd98a | Stefan Weil | } |
589 | 0c7bfc32 | Paolo Bonzini | |
590 | eb9566d1 | Paolo Bonzini | nb_sectors -= n_sectors; |
591 | eb9566d1 | Paolo Bonzini | sector_num += n_sectors; |
592 | eb9566d1 | Paolo Bonzini | buf += n_sectors * SECTOR_SIZE; |
593 | 0c7bfc32 | Paolo Bonzini | |
594 | eb9566d1 | Paolo Bonzini | logout("%u sectors written\n", n_sectors);
|
595 | 9aebd98a | Stefan Weil | } |
596 | 9aebd98a | Stefan Weil | |
597 | 0c7bfc32 | Paolo Bonzini | logout("finished data write\n");
|
598 | 4eea78e6 | Paolo Bonzini | if (ret < 0) { |
599 | 4eea78e6 | Paolo Bonzini | return ret;
|
600 | 4eea78e6 | Paolo Bonzini | } |
601 | 4eea78e6 | Paolo Bonzini | |
602 | 4eea78e6 | Paolo Bonzini | if (block) {
|
603 | 4eea78e6 | Paolo Bonzini | /* One or more new blocks were allocated. */
|
604 | 4eea78e6 | Paolo Bonzini | VdiHeader *header = (VdiHeader *) block; |
605 | 4eea78e6 | Paolo Bonzini | uint8_t *base; |
606 | 4eea78e6 | Paolo Bonzini | uint64_t offset; |
607 | 4eea78e6 | Paolo Bonzini | |
608 | 4eea78e6 | Paolo Bonzini | logout("now writing modified header\n");
|
609 | 4eea78e6 | Paolo Bonzini | assert(VDI_IS_ALLOCATED(bmap_first)); |
610 | 4eea78e6 | Paolo Bonzini | *header = s->header; |
611 | 4eea78e6 | Paolo Bonzini | vdi_header_to_le(header); |
612 | 4eea78e6 | Paolo Bonzini | ret = bdrv_write(bs->file, 0, block, 1); |
613 | bfc45fc1 | Paolo Bonzini | g_free(block); |
614 | bfc45fc1 | Paolo Bonzini | block = NULL;
|
615 | 4eea78e6 | Paolo Bonzini | |
616 | 4eea78e6 | Paolo Bonzini | if (ret < 0) { |
617 | 4eea78e6 | Paolo Bonzini | return ret;
|
618 | 0c7bfc32 | Paolo Bonzini | } |
619 | 4eea78e6 | Paolo Bonzini | |
620 | 4eea78e6 | Paolo Bonzini | logout("now writing modified block map entry %u...%u\n",
|
621 | 4eea78e6 | Paolo Bonzini | bmap_first, bmap_last); |
622 | 4eea78e6 | Paolo Bonzini | /* Write modified sectors from block map. */
|
623 | 4eea78e6 | Paolo Bonzini | bmap_first /= (SECTOR_SIZE / sizeof(uint32_t));
|
624 | 4eea78e6 | Paolo Bonzini | bmap_last /= (SECTOR_SIZE / sizeof(uint32_t));
|
625 | 4eea78e6 | Paolo Bonzini | n_sectors = bmap_last - bmap_first + 1;
|
626 | 4eea78e6 | Paolo Bonzini | offset = s->bmap_sector + bmap_first; |
627 | 4eea78e6 | Paolo Bonzini | base = ((uint8_t *)&s->bmap[0]) + bmap_first * SECTOR_SIZE;
|
628 | 4eea78e6 | Paolo Bonzini | logout("will write %u block map sectors starting from entry %u\n",
|
629 | 4eea78e6 | Paolo Bonzini | n_sectors, bmap_first); |
630 | 4eea78e6 | Paolo Bonzini | ret = bdrv_write(bs->file, offset, base, n_sectors); |
631 | 0c7bfc32 | Paolo Bonzini | } |
632 | 0c7bfc32 | Paolo Bonzini | |
633 | 3d46a75a | Paolo Bonzini | return ret;
|
634 | 9aebd98a | Stefan Weil | } |
635 | 9aebd98a | Stefan Weil | |
636 | 9aebd98a | Stefan Weil | static int vdi_create(const char *filename, QEMUOptionParameter *options) |
637 | 9aebd98a | Stefan Weil | { |
638 | 9aebd98a | Stefan Weil | int fd;
|
639 | 9aebd98a | Stefan Weil | int result = 0; |
640 | 9aebd98a | Stefan Weil | uint64_t bytes = 0;
|
641 | 9aebd98a | Stefan Weil | uint32_t blocks; |
642 | 99cce9fa | Kevin Wolf | size_t block_size = DEFAULT_CLUSTER_SIZE; |
643 | 9aebd98a | Stefan Weil | uint32_t image_type = VDI_TYPE_DYNAMIC; |
644 | 9aebd98a | Stefan Weil | VdiHeader header; |
645 | 9aebd98a | Stefan Weil | size_t i; |
646 | 9aebd98a | Stefan Weil | size_t bmap_size; |
647 | 9aebd98a | Stefan Weil | |
648 | 9aebd98a | Stefan Weil | logout("\n");
|
649 | 9aebd98a | Stefan Weil | |
650 | 9aebd98a | Stefan Weil | /* Read out options. */
|
651 | 9aebd98a | Stefan Weil | while (options && options->name) {
|
652 | 9aebd98a | Stefan Weil | if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
653 | 9aebd98a | Stefan Weil | bytes = options->value.n; |
654 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_BLOCK_SIZE)
|
655 | 9aebd98a | Stefan Weil | } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) { |
656 | 9aebd98a | Stefan Weil | if (options->value.n) {
|
657 | 9aebd98a | Stefan Weil | /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */
|
658 | 9aebd98a | Stefan Weil | block_size = options->value.n; |
659 | 9aebd98a | Stefan Weil | } |
660 | 9aebd98a | Stefan Weil | #endif
|
661 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_STATIC_IMAGE)
|
662 | 9aebd98a | Stefan Weil | } else if (!strcmp(options->name, BLOCK_OPT_STATIC)) { |
663 | 6eea90eb | Stefan Weil | if (options->value.n) {
|
664 | 6eea90eb | Stefan Weil | image_type = VDI_TYPE_STATIC; |
665 | 6eea90eb | Stefan Weil | } |
666 | 9aebd98a | Stefan Weil | #endif
|
667 | 9aebd98a | Stefan Weil | } |
668 | 9aebd98a | Stefan Weil | options++; |
669 | 9aebd98a | Stefan Weil | } |
670 | 9aebd98a | Stefan Weil | |
671 | 6165f4d8 | Corey Bryant | fd = qemu_open(filename, |
672 | 6165f4d8 | Corey Bryant | O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
673 | 6165f4d8 | Corey Bryant | 0644);
|
674 | 9aebd98a | Stefan Weil | if (fd < 0) { |
675 | 9aebd98a | Stefan Weil | return -errno;
|
676 | 9aebd98a | Stefan Weil | } |
677 | 9aebd98a | Stefan Weil | |
678 | f21dc3a4 | Stefan Weil | /* We need enough blocks to store the given disk size,
|
679 | f21dc3a4 | Stefan Weil | so always round up. */
|
680 | f21dc3a4 | Stefan Weil | blocks = (bytes + block_size - 1) / block_size;
|
681 | f21dc3a4 | Stefan Weil | |
682 | 9aebd98a | Stefan Weil | bmap_size = blocks * sizeof(uint32_t);
|
683 | 9aebd98a | Stefan Weil | bmap_size = ((bmap_size + SECTOR_SIZE - 1) & ~(SECTOR_SIZE -1)); |
684 | 9aebd98a | Stefan Weil | |
685 | 9aebd98a | Stefan Weil | memset(&header, 0, sizeof(header)); |
686 | 1786dc15 | Blue Swirl | pstrcpy(header.text, sizeof(header.text), VDI_TEXT);
|
687 | 9aebd98a | Stefan Weil | header.signature = VDI_SIGNATURE; |
688 | 9aebd98a | Stefan Weil | header.version = VDI_VERSION_1_1; |
689 | 9aebd98a | Stefan Weil | header.header_size = 0x180;
|
690 | 9aebd98a | Stefan Weil | header.image_type = image_type; |
691 | 9aebd98a | Stefan Weil | header.offset_bmap = 0x200;
|
692 | 9aebd98a | Stefan Weil | header.offset_data = 0x200 + bmap_size;
|
693 | 9aebd98a | Stefan Weil | header.sector_size = SECTOR_SIZE; |
694 | 9aebd98a | Stefan Weil | header.disk_size = bytes; |
695 | 9aebd98a | Stefan Weil | header.block_size = block_size; |
696 | 9aebd98a | Stefan Weil | header.blocks_in_image = blocks; |
697 | 6eea90eb | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
698 | 6eea90eb | Stefan Weil | header.blocks_allocated = blocks; |
699 | 6eea90eb | Stefan Weil | } |
700 | 9aebd98a | Stefan Weil | uuid_generate(header.uuid_image); |
701 | 9aebd98a | Stefan Weil | uuid_generate(header.uuid_last_snap); |
702 | 9aebd98a | Stefan Weil | /* There is no need to set header.uuid_link or header.uuid_parent here. */
|
703 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
|
704 | 9aebd98a | Stefan Weil | vdi_header_print(&header); |
705 | 9aebd98a | Stefan Weil | #endif
|
706 | 9aebd98a | Stefan Weil | vdi_header_to_le(&header); |
707 | 9aebd98a | Stefan Weil | if (write(fd, &header, sizeof(header)) < 0) { |
708 | 9aebd98a | Stefan Weil | result = -errno; |
709 | 9aebd98a | Stefan Weil | } |
710 | 9aebd98a | Stefan Weil | |
711 | b76b6e95 | Stefan Weil | if (bmap_size > 0) { |
712 | 514f21a5 | Stefan Weil | uint32_t *bmap = g_malloc0(bmap_size); |
713 | 514f21a5 | Stefan Weil | for (i = 0; i < blocks; i++) { |
714 | 514f21a5 | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
715 | 514f21a5 | Stefan Weil | bmap[i] = i; |
716 | 514f21a5 | Stefan Weil | } else {
|
717 | 514f21a5 | Stefan Weil | bmap[i] = VDI_UNALLOCATED; |
718 | 514f21a5 | Stefan Weil | } |
719 | 9aebd98a | Stefan Weil | } |
720 | 514f21a5 | Stefan Weil | if (write(fd, bmap, bmap_size) < 0) { |
721 | 514f21a5 | Stefan Weil | result = -errno; |
722 | 514f21a5 | Stefan Weil | } |
723 | 514f21a5 | Stefan Weil | g_free(bmap); |
724 | 9aebd98a | Stefan Weil | } |
725 | 514f21a5 | Stefan Weil | |
726 | 9aebd98a | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
727 | 9aebd98a | Stefan Weil | if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) { |
728 | 9aebd98a | Stefan Weil | result = -errno; |
729 | 9aebd98a | Stefan Weil | } |
730 | 9aebd98a | Stefan Weil | } |
731 | 9aebd98a | Stefan Weil | |
732 | 9aebd98a | Stefan Weil | if (close(fd) < 0) { |
733 | 9aebd98a | Stefan Weil | result = -errno; |
734 | 9aebd98a | Stefan Weil | } |
735 | 9aebd98a | Stefan Weil | |
736 | 9aebd98a | Stefan Weil | return result;
|
737 | 9aebd98a | Stefan Weil | } |
738 | 9aebd98a | Stefan Weil | |
739 | 9aebd98a | Stefan Weil | static void vdi_close(BlockDriverState *bs) |
740 | 9aebd98a | Stefan Weil | { |
741 | fc9d106c | Kevin Wolf | BDRVVdiState *s = bs->opaque; |
742 | 6ac5f388 | Kevin Wolf | |
743 | 6ac5f388 | Kevin Wolf | g_free(s->bmap); |
744 | 6ac5f388 | Kevin Wolf | |
745 | fc9d106c | Kevin Wolf | migrate_del_blocker(s->migration_blocker); |
746 | fc9d106c | Kevin Wolf | error_free(s->migration_blocker); |
747 | 9aebd98a | Stefan Weil | } |
748 | 9aebd98a | Stefan Weil | |
749 | 9aebd98a | Stefan Weil | static QEMUOptionParameter vdi_create_options[] = {
|
750 | 9aebd98a | Stefan Weil | { |
751 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_SIZE, |
752 | 9aebd98a | Stefan Weil | .type = OPT_SIZE, |
753 | 9aebd98a | Stefan Weil | .help = "Virtual disk size"
|
754 | 9aebd98a | Stefan Weil | }, |
755 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_BLOCK_SIZE)
|
756 | 9aebd98a | Stefan Weil | { |
757 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_CLUSTER_SIZE, |
758 | 9aebd98a | Stefan Weil | .type = OPT_SIZE, |
759 | 99cce9fa | Kevin Wolf | .help = "VDI cluster (block) size",
|
760 | 99cce9fa | Kevin Wolf | .value = { .n = DEFAULT_CLUSTER_SIZE }, |
761 | 9aebd98a | Stefan Weil | }, |
762 | 9aebd98a | Stefan Weil | #endif
|
763 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_STATIC_IMAGE)
|
764 | 9aebd98a | Stefan Weil | { |
765 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_STATIC, |
766 | 9aebd98a | Stefan Weil | .type = OPT_FLAG, |
767 | 9aebd98a | Stefan Weil | .help = "VDI static (pre-allocated) image"
|
768 | 9aebd98a | Stefan Weil | }, |
769 | 9aebd98a | Stefan Weil | #endif
|
770 | 9aebd98a | Stefan Weil | /* TODO: An additional option to set UUID values might be useful. */
|
771 | 9aebd98a | Stefan Weil | { NULL }
|
772 | 9aebd98a | Stefan Weil | }; |
773 | 9aebd98a | Stefan Weil | |
774 | 9aebd98a | Stefan Weil | static BlockDriver bdrv_vdi = {
|
775 | 9aebd98a | Stefan Weil | .format_name = "vdi",
|
776 | 9aebd98a | Stefan Weil | .instance_size = sizeof(BDRVVdiState),
|
777 | 9aebd98a | Stefan Weil | .bdrv_probe = vdi_probe, |
778 | 9aebd98a | Stefan Weil | .bdrv_open = vdi_open, |
779 | 9aebd98a | Stefan Weil | .bdrv_close = vdi_close, |
780 | ecfe2bba | Jeff Cody | .bdrv_reopen_prepare = vdi_reopen_prepare, |
781 | 9aebd98a | Stefan Weil | .bdrv_create = vdi_create, |
782 | e850b35a | Stefan Hajnoczi | .bdrv_co_is_allocated = vdi_co_is_allocated, |
783 | 9aebd98a | Stefan Weil | .bdrv_make_empty = vdi_make_empty, |
784 | 9aebd98a | Stefan Weil | |
785 | a7a43aa1 | Paolo Bonzini | .bdrv_read = vdi_co_read, |
786 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_WRITE)
|
787 | a7a43aa1 | Paolo Bonzini | .bdrv_write = vdi_co_write, |
788 | 9aebd98a | Stefan Weil | #endif
|
789 | 9aebd98a | Stefan Weil | |
790 | 9aebd98a | Stefan Weil | .bdrv_get_info = vdi_get_info, |
791 | 9aebd98a | Stefan Weil | |
792 | 9aebd98a | Stefan Weil | .create_options = vdi_create_options, |
793 | 9aebd98a | Stefan Weil | .bdrv_check = vdi_check, |
794 | 9aebd98a | Stefan Weil | }; |
795 | 9aebd98a | Stefan Weil | |
796 | 9aebd98a | Stefan Weil | static void bdrv_vdi_init(void) |
797 | 9aebd98a | Stefan Weil | { |
798 | 9aebd98a | Stefan Weil | logout("\n");
|
799 | 9aebd98a | Stefan Weil | bdrv_register(&bdrv_vdi); |
800 | 9aebd98a | Stefan Weil | } |
801 | 9aebd98a | Stefan Weil | |
802 | 9aebd98a | Stefan Weil | block_init(bdrv_vdi_init); |