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1 | fc01f7e7 | bellard | /*
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2 | fc01f7e7 | bellard | * QEMU System Emulator block driver
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3 | fc01f7e7 | bellard | *
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4 | fc01f7e7 | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | fc01f7e7 | bellard | *
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6 | fc01f7e7 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | fc01f7e7 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | fc01f7e7 | bellard | * in the Software without restriction, including without limitation the rights
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9 | fc01f7e7 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | fc01f7e7 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | fc01f7e7 | bellard | * furnished to do so, subject to the following conditions:
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12 | fc01f7e7 | bellard | *
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13 | fc01f7e7 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | fc01f7e7 | bellard | * all copies or substantial portions of the Software.
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15 | fc01f7e7 | bellard | *
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16 | fc01f7e7 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | fc01f7e7 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | fc01f7e7 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | fc01f7e7 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | fc01f7e7 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | fc01f7e7 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | fc01f7e7 | bellard | * THE SOFTWARE.
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23 | fc01f7e7 | bellard | */
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24 | fc01f7e7 | bellard | #include "vl.h" |
25 | ea2384d3 | bellard | #include "block_int.h" |
26 | fc01f7e7 | bellard | |
27 | 7674e7bf | bellard | #ifdef _BSD
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28 | 7674e7bf | bellard | #include <sys/types.h> |
29 | 7674e7bf | bellard | #include <sys/stat.h> |
30 | 7674e7bf | bellard | #include <sys/ioctl.h> |
31 | 7674e7bf | bellard | #include <sys/queue.h> |
32 | 7674e7bf | bellard | #include <sys/disk.h> |
33 | 7674e7bf | bellard | #endif
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34 | 7674e7bf | bellard | |
35 | b338082b | bellard | static BlockDriverState *bdrv_first;
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36 | ea2384d3 | bellard | static BlockDriver *first_drv;
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37 | ea2384d3 | bellard | |
38 | ea2384d3 | bellard | void bdrv_register(BlockDriver *bdrv)
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39 | ea2384d3 | bellard | { |
40 | ea2384d3 | bellard | bdrv->next = first_drv; |
41 | ea2384d3 | bellard | first_drv = bdrv; |
42 | ea2384d3 | bellard | } |
43 | b338082b | bellard | |
44 | b338082b | bellard | /* create a new block device (by default it is empty) */
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45 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
46 | b338082b | bellard | { |
47 | b338082b | bellard | BlockDriverState **pbs, *bs; |
48 | b338082b | bellard | |
49 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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50 | b338082b | bellard | if(!bs)
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51 | b338082b | bellard | return NULL; |
52 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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53 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
54 | ea2384d3 | bellard | /* insert at the end */
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55 | ea2384d3 | bellard | pbs = &bdrv_first; |
56 | ea2384d3 | bellard | while (*pbs != NULL) |
57 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
58 | ea2384d3 | bellard | *pbs = bs; |
59 | ea2384d3 | bellard | } |
60 | b338082b | bellard | return bs;
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61 | b338082b | bellard | } |
62 | b338082b | bellard | |
63 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
64 | ea2384d3 | bellard | { |
65 | ea2384d3 | bellard | BlockDriver *drv1; |
66 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
67 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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68 | ea2384d3 | bellard | return drv1;
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69 | ea2384d3 | bellard | } |
70 | ea2384d3 | bellard | return NULL; |
71 | ea2384d3 | bellard | } |
72 | ea2384d3 | bellard | |
73 | ea2384d3 | bellard | int bdrv_create(BlockDriver *drv,
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74 | ea2384d3 | bellard | const char *filename, int64_t size_in_sectors, |
75 | ea2384d3 | bellard | const char *backing_file, int flags) |
76 | ea2384d3 | bellard | { |
77 | ea2384d3 | bellard | if (!drv->bdrv_create)
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78 | ea2384d3 | bellard | return -ENOTSUP;
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79 | ea2384d3 | bellard | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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80 | ea2384d3 | bellard | } |
81 | ea2384d3 | bellard | |
82 | d5249393 | bellard | #ifdef _WIN32
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83 | d5249393 | bellard | static void get_tmp_filename(char *filename, int size) |
84 | d5249393 | bellard | { |
85 | d5249393 | bellard | /* XXX: find a better function */
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86 | d5249393 | bellard | tmpnam(filename); |
87 | d5249393 | bellard | } |
88 | d5249393 | bellard | #else
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89 | ea2384d3 | bellard | static void get_tmp_filename(char *filename, int size) |
90 | fc01f7e7 | bellard | { |
91 | 67b915a5 | bellard | int fd;
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92 | d5249393 | bellard | /* XXX: race condition possible */
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93 | ea2384d3 | bellard | pstrcpy(filename, size, "/tmp/vl.XXXXXX");
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94 | ea2384d3 | bellard | fd = mkstemp(filename); |
95 | ea2384d3 | bellard | close(fd); |
96 | ea2384d3 | bellard | } |
97 | d5249393 | bellard | #endif
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98 | fc01f7e7 | bellard | |
99 | 7674e7bf | bellard | /* XXX: force raw format if block or character device ? It would
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100 | 7674e7bf | bellard | simplify the BSD case */
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101 | ea2384d3 | bellard | static BlockDriver *find_image_format(const char *filename) |
102 | ea2384d3 | bellard | { |
103 | ea2384d3 | bellard | int fd, ret, score, score_max;
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104 | ea2384d3 | bellard | BlockDriver *drv1, *drv; |
105 | 7674e7bf | bellard | uint8_t *buf; |
106 | 7674e7bf | bellard | size_t bufsize = 1024;
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107 | 33e3963e | bellard | |
108 | ea2384d3 | bellard | fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); |
109 | ea2384d3 | bellard | if (fd < 0) |
110 | ea2384d3 | bellard | return NULL; |
111 | 7674e7bf | bellard | #ifdef DIOCGSECTORSIZE
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112 | 7674e7bf | bellard | { |
113 | 7674e7bf | bellard | unsigned int sectorsize = 512; |
114 | 7674e7bf | bellard | if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
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115 | 7674e7bf | bellard | sectorsize > bufsize) |
116 | 7674e7bf | bellard | bufsize = sectorsize; |
117 | 7674e7bf | bellard | } |
118 | 7674e7bf | bellard | #endif
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119 | 7674e7bf | bellard | buf = malloc(bufsize); |
120 | 7674e7bf | bellard | if (!buf)
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121 | 7674e7bf | bellard | return NULL; |
122 | 7674e7bf | bellard | ret = read(fd, buf, bufsize); |
123 | ea2384d3 | bellard | if (ret < 0) { |
124 | ea2384d3 | bellard | close(fd); |
125 | 7674e7bf | bellard | free(buf); |
126 | ea2384d3 | bellard | return NULL; |
127 | ea2384d3 | bellard | } |
128 | ea2384d3 | bellard | close(fd); |
129 | ea2384d3 | bellard | |
130 | ea2384d3 | bellard | drv = NULL;
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131 | ea2384d3 | bellard | score_max = 0;
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132 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
133 | ea2384d3 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
134 | ea2384d3 | bellard | if (score > score_max) {
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135 | ea2384d3 | bellard | score_max = score; |
136 | ea2384d3 | bellard | drv = drv1; |
137 | 0849bf08 | bellard | } |
138 | fc01f7e7 | bellard | } |
139 | 7674e7bf | bellard | free(buf); |
140 | ea2384d3 | bellard | return drv;
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141 | ea2384d3 | bellard | } |
142 | ea2384d3 | bellard | |
143 | ea2384d3 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int snapshot) |
144 | ea2384d3 | bellard | { |
145 | ea2384d3 | bellard | return bdrv_open2(bs, filename, snapshot, NULL); |
146 | ea2384d3 | bellard | } |
147 | ea2384d3 | bellard | |
148 | ea2384d3 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int snapshot, |
149 | ea2384d3 | bellard | BlockDriver *drv) |
150 | ea2384d3 | bellard | { |
151 | ea2384d3 | bellard | int ret;
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152 | ea2384d3 | bellard | char tmp_filename[1024]; |
153 | ea2384d3 | bellard | |
154 | ea2384d3 | bellard | bs->read_only = 0;
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155 | ea2384d3 | bellard | bs->is_temporary = 0;
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156 | ea2384d3 | bellard | bs->encrypted = 0;
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157 | ea2384d3 | bellard | |
158 | ea2384d3 | bellard | if (snapshot) {
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159 | ea2384d3 | bellard | BlockDriverState *bs1; |
160 | ea2384d3 | bellard | int64_t total_size; |
161 | ea2384d3 | bellard | |
162 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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163 | ea2384d3 | bellard | instead of opening 'filename' directly */
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164 | 33e3963e | bellard | |
165 | ea2384d3 | bellard | /* if there is a backing file, use it */
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166 | ea2384d3 | bellard | bs1 = bdrv_new("");
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167 | ea2384d3 | bellard | if (!bs1) {
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168 | ea2384d3 | bellard | return -1; |
169 | ea2384d3 | bellard | } |
170 | ea2384d3 | bellard | if (bdrv_open(bs1, filename, 0) < 0) { |
171 | ea2384d3 | bellard | bdrv_delete(bs1); |
172 | ea2384d3 | bellard | return -1; |
173 | ea2384d3 | bellard | } |
174 | ea2384d3 | bellard | total_size = bs1->total_sectors; |
175 | ea2384d3 | bellard | bdrv_delete(bs1); |
176 | ea2384d3 | bellard | |
177 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
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178 | ea2384d3 | bellard | /* XXX: use cow for linux as it is more efficient ? */
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179 | ea2384d3 | bellard | if (bdrv_create(&bdrv_qcow, tmp_filename,
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180 | ea2384d3 | bellard | total_size, filename, 0) < 0) { |
181 | ea2384d3 | bellard | return -1; |
182 | ea2384d3 | bellard | } |
183 | ea2384d3 | bellard | filename = tmp_filename; |
184 | ea2384d3 | bellard | bs->is_temporary = 1;
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185 | ea2384d3 | bellard | } |
186 | ea2384d3 | bellard | |
187 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
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188 | ea2384d3 | bellard | if (!drv) {
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189 | ea2384d3 | bellard | drv = find_image_format(filename); |
190 | ea2384d3 | bellard | if (!drv)
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191 | ea2384d3 | bellard | return -1; |
192 | ea2384d3 | bellard | } |
193 | ea2384d3 | bellard | bs->drv = drv; |
194 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
195 | ea2384d3 | bellard | if (bs->opaque == NULL && drv->instance_size > 0) |
196 | ea2384d3 | bellard | return -1; |
197 | ea2384d3 | bellard | |
198 | ea2384d3 | bellard | ret = drv->bdrv_open(bs, filename); |
199 | ea2384d3 | bellard | if (ret < 0) { |
200 | ea2384d3 | bellard | qemu_free(bs->opaque); |
201 | ea2384d3 | bellard | return -1; |
202 | 33e3963e | bellard | } |
203 | 67b915a5 | bellard | #ifndef _WIN32
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204 | ea2384d3 | bellard | if (bs->is_temporary) {
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205 | ea2384d3 | bellard | unlink(filename); |
206 | ea2384d3 | bellard | } |
207 | ea2384d3 | bellard | #endif
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208 | ea2384d3 | bellard | if (bs->backing_file[0] != '\0' && drv->bdrv_is_allocated) { |
209 | ea2384d3 | bellard | /* if there is a backing file, use it */
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210 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
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211 | ea2384d3 | bellard | if (!bs->backing_hd) {
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212 | ea2384d3 | bellard | fail:
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213 | ea2384d3 | bellard | bdrv_close(bs); |
214 | ea2384d3 | bellard | return -1; |
215 | 33e3963e | bellard | } |
216 | ea2384d3 | bellard | if (bdrv_open(bs->backing_hd, bs->backing_file, 0) < 0) |
217 | 33e3963e | bellard | goto fail;
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218 | 33e3963e | bellard | } |
219 | 33e3963e | bellard | |
220 | b338082b | bellard | bs->inserted = 1;
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221 | b338082b | bellard | |
222 | b338082b | bellard | /* call the change callback */
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223 | b338082b | bellard | if (bs->change_cb)
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224 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
225 | b338082b | bellard | |
226 | b338082b | bellard | return 0; |
227 | fc01f7e7 | bellard | } |
228 | fc01f7e7 | bellard | |
229 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
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230 | fc01f7e7 | bellard | { |
231 | b338082b | bellard | if (bs->inserted) {
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232 | ea2384d3 | bellard | if (bs->backing_hd)
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233 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
234 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
235 | ea2384d3 | bellard | qemu_free(bs->opaque); |
236 | ea2384d3 | bellard | #ifdef _WIN32
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237 | ea2384d3 | bellard | if (bs->is_temporary) {
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238 | ea2384d3 | bellard | unlink(bs->filename); |
239 | ea2384d3 | bellard | } |
240 | 67b915a5 | bellard | #endif
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241 | ea2384d3 | bellard | bs->opaque = NULL;
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242 | ea2384d3 | bellard | bs->drv = NULL;
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243 | b338082b | bellard | bs->inserted = 0;
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244 | b338082b | bellard | |
245 | b338082b | bellard | /* call the change callback */
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246 | b338082b | bellard | if (bs->change_cb)
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247 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
248 | b338082b | bellard | } |
249 | b338082b | bellard | } |
250 | b338082b | bellard | |
251 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
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252 | b338082b | bellard | { |
253 | ea2384d3 | bellard | /* XXX: remove the driver list */
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254 | b338082b | bellard | bdrv_close(bs); |
255 | b338082b | bellard | qemu_free(bs); |
256 | fc01f7e7 | bellard | } |
257 | fc01f7e7 | bellard | |
258 | 33e3963e | bellard | /* commit COW file into the raw image */
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259 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
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260 | 33e3963e | bellard | { |
261 | 33e3963e | bellard | int64_t i; |
262 | ea2384d3 | bellard | int n, j;
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263 | ea2384d3 | bellard | unsigned char sector[512]; |
264 | 33e3963e | bellard | |
265 | b338082b | bellard | if (!bs->inserted)
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266 | ea2384d3 | bellard | return -ENOENT;
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267 | 33e3963e | bellard | |
268 | 33e3963e | bellard | if (bs->read_only) {
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269 | ea2384d3 | bellard | return -EACCES;
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270 | 33e3963e | bellard | } |
271 | 33e3963e | bellard | |
272 | ea2384d3 | bellard | if (!bs->backing_hd) {
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273 | ea2384d3 | bellard | return -ENOTSUP;
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274 | ea2384d3 | bellard | } |
275 | 33e3963e | bellard | |
276 | ea2384d3 | bellard | for (i = 0; i < bs->total_sectors;) { |
277 | ea2384d3 | bellard | if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
278 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
279 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
280 | ea2384d3 | bellard | return -EIO;
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281 | ea2384d3 | bellard | } |
282 | ea2384d3 | bellard | |
283 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
284 | ea2384d3 | bellard | return -EIO;
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285 | ea2384d3 | bellard | } |
286 | ea2384d3 | bellard | i++; |
287 | 33e3963e | bellard | } |
288 | ea2384d3 | bellard | } else {
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289 | ea2384d3 | bellard | i += n; |
290 | ea2384d3 | bellard | } |
291 | 33e3963e | bellard | } |
292 | 33e3963e | bellard | return 0; |
293 | 33e3963e | bellard | } |
294 | 33e3963e | bellard | |
295 | fc01f7e7 | bellard | /* return -1 if error */
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296 | fc01f7e7 | bellard | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
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297 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
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298 | fc01f7e7 | bellard | { |
299 | ea2384d3 | bellard | int ret, n;
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300 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
301 | ea2384d3 | bellard | |
302 | b338082b | bellard | if (!bs->inserted)
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303 | b338082b | bellard | return -1; |
304 | b338082b | bellard | |
305 | 33e3963e | bellard | while (nb_sectors > 0) { |
306 | ea2384d3 | bellard | if (sector_num == 0 && bs->boot_sector_enabled) { |
307 | cf98951b | bellard | memcpy(buf, bs->boot_sector_data, 512);
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308 | cf98951b | bellard | n = 1;
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309 | ea2384d3 | bellard | } else if (bs->backing_hd) { |
310 | ea2384d3 | bellard | if (drv->bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) {
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311 | ea2384d3 | bellard | ret = drv->bdrv_read(bs, sector_num, buf, n); |
312 | ea2384d3 | bellard | if (ret < 0) |
313 | ea2384d3 | bellard | return -1; |
314 | ea2384d3 | bellard | } else {
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315 | ea2384d3 | bellard | /* read from the base image */
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316 | ea2384d3 | bellard | ret = bdrv_read(bs->backing_hd, sector_num, buf, n); |
317 | ea2384d3 | bellard | if (ret < 0) |
318 | ea2384d3 | bellard | return -1; |
319 | ea2384d3 | bellard | } |
320 | 33e3963e | bellard | } else {
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321 | ea2384d3 | bellard | ret = drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
322 | ea2384d3 | bellard | if (ret < 0) |
323 | 33e3963e | bellard | return -1; |
324 | ea2384d3 | bellard | /* no need to loop */
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325 | ea2384d3 | bellard | break;
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326 | 33e3963e | bellard | } |
327 | 33e3963e | bellard | nb_sectors -= n; |
328 | 33e3963e | bellard | sector_num += n; |
329 | 33e3963e | bellard | buf += n * 512;
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330 | 33e3963e | bellard | } |
331 | 33e3963e | bellard | return 0; |
332 | fc01f7e7 | bellard | } |
333 | fc01f7e7 | bellard | |
334 | fc01f7e7 | bellard | /* return -1 if error */
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335 | fc01f7e7 | bellard | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
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336 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
337 | fc01f7e7 | bellard | { |
338 | b338082b | bellard | if (!bs->inserted)
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339 | b338082b | bellard | return -1; |
340 | 0849bf08 | bellard | if (bs->read_only)
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341 | 0849bf08 | bellard | return -1; |
342 | ea2384d3 | bellard | return bs->drv->bdrv_write(bs, sector_num, buf, nb_sectors);
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343 | fc01f7e7 | bellard | } |
344 | fc01f7e7 | bellard | |
345 | fc01f7e7 | bellard | void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
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346 | fc01f7e7 | bellard | { |
347 | fc01f7e7 | bellard | *nb_sectors_ptr = bs->total_sectors; |
348 | fc01f7e7 | bellard | } |
349 | cf98951b | bellard | |
350 | cf98951b | bellard | /* force a given boot sector. */
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351 | cf98951b | bellard | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
352 | cf98951b | bellard | { |
353 | cf98951b | bellard | bs->boot_sector_enabled = 1;
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354 | cf98951b | bellard | if (size > 512) |
355 | cf98951b | bellard | size = 512;
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356 | cf98951b | bellard | memcpy(bs->boot_sector_data, data, size); |
357 | cf98951b | bellard | memset(bs->boot_sector_data + size, 0, 512 - size); |
358 | cf98951b | bellard | } |
359 | b338082b | bellard | |
360 | b338082b | bellard | void bdrv_set_geometry_hint(BlockDriverState *bs,
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361 | b338082b | bellard | int cyls, int heads, int secs) |
362 | b338082b | bellard | { |
363 | b338082b | bellard | bs->cyls = cyls; |
364 | b338082b | bellard | bs->heads = heads; |
365 | b338082b | bellard | bs->secs = secs; |
366 | b338082b | bellard | } |
367 | b338082b | bellard | |
368 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
369 | b338082b | bellard | { |
370 | b338082b | bellard | bs->type = type; |
371 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
372 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
373 | b338082b | bellard | } |
374 | b338082b | bellard | |
375 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
376 | 46d4767d | bellard | { |
377 | 46d4767d | bellard | bs->translation = translation; |
378 | 46d4767d | bellard | } |
379 | 46d4767d | bellard | |
380 | b338082b | bellard | void bdrv_get_geometry_hint(BlockDriverState *bs,
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381 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
382 | b338082b | bellard | { |
383 | b338082b | bellard | *pcyls = bs->cyls; |
384 | b338082b | bellard | *pheads = bs->heads; |
385 | b338082b | bellard | *psecs = bs->secs; |
386 | b338082b | bellard | } |
387 | b338082b | bellard | |
388 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
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389 | b338082b | bellard | { |
390 | b338082b | bellard | return bs->type;
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391 | b338082b | bellard | } |
392 | b338082b | bellard | |
393 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
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394 | 46d4767d | bellard | { |
395 | 46d4767d | bellard | return bs->translation;
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396 | 46d4767d | bellard | } |
397 | 46d4767d | bellard | |
398 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
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399 | b338082b | bellard | { |
400 | b338082b | bellard | return bs->removable;
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401 | b338082b | bellard | } |
402 | b338082b | bellard | |
403 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
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404 | b338082b | bellard | { |
405 | b338082b | bellard | return bs->read_only;
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406 | b338082b | bellard | } |
407 | b338082b | bellard | |
408 | b338082b | bellard | int bdrv_is_inserted(BlockDriverState *bs)
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409 | b338082b | bellard | { |
410 | b338082b | bellard | return bs->inserted;
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411 | b338082b | bellard | } |
412 | b338082b | bellard | |
413 | b338082b | bellard | int bdrv_is_locked(BlockDriverState *bs)
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414 | b338082b | bellard | { |
415 | b338082b | bellard | return bs->locked;
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416 | b338082b | bellard | } |
417 | b338082b | bellard | |
418 | b338082b | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
419 | b338082b | bellard | { |
420 | b338082b | bellard | bs->locked = locked; |
421 | b338082b | bellard | } |
422 | b338082b | bellard | |
423 | b338082b | bellard | void bdrv_set_change_cb(BlockDriverState *bs,
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424 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
425 | b338082b | bellard | { |
426 | b338082b | bellard | bs->change_cb = change_cb; |
427 | b338082b | bellard | bs->change_opaque = opaque; |
428 | b338082b | bellard | } |
429 | b338082b | bellard | |
430 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
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431 | ea2384d3 | bellard | { |
432 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
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433 | ea2384d3 | bellard | return 1; |
434 | ea2384d3 | bellard | return bs->encrypted;
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435 | ea2384d3 | bellard | } |
436 | ea2384d3 | bellard | |
437 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
438 | ea2384d3 | bellard | { |
439 | ea2384d3 | bellard | int ret;
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440 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
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441 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
442 | ea2384d3 | bellard | if (ret < 0) |
443 | ea2384d3 | bellard | return ret;
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444 | ea2384d3 | bellard | if (!bs->encrypted)
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445 | ea2384d3 | bellard | return 0; |
446 | ea2384d3 | bellard | } |
447 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
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448 | ea2384d3 | bellard | return -1; |
449 | ea2384d3 | bellard | return bs->drv->bdrv_set_key(bs, key);
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450 | ea2384d3 | bellard | } |
451 | ea2384d3 | bellard | |
452 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
453 | ea2384d3 | bellard | { |
454 | ea2384d3 | bellard | if (!bs->inserted || !bs->drv) {
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455 | ea2384d3 | bellard | buf[0] = '\0'; |
456 | ea2384d3 | bellard | } else {
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457 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
458 | ea2384d3 | bellard | } |
459 | ea2384d3 | bellard | } |
460 | ea2384d3 | bellard | |
461 | ea2384d3 | bellard | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
462 | ea2384d3 | bellard | void *opaque)
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463 | ea2384d3 | bellard | { |
464 | ea2384d3 | bellard | BlockDriver *drv; |
465 | ea2384d3 | bellard | |
466 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
467 | ea2384d3 | bellard | it(opaque, drv->format_name); |
468 | ea2384d3 | bellard | } |
469 | ea2384d3 | bellard | } |
470 | ea2384d3 | bellard | |
471 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
472 | b338082b | bellard | { |
473 | b338082b | bellard | BlockDriverState *bs; |
474 | b338082b | bellard | |
475 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
476 | b338082b | bellard | if (!strcmp(name, bs->device_name))
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477 | b338082b | bellard | return bs;
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478 | b338082b | bellard | } |
479 | b338082b | bellard | return NULL; |
480 | b338082b | bellard | } |
481 | b338082b | bellard | |
482 | 81d0912d | bellard | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
483 | 81d0912d | bellard | { |
484 | 81d0912d | bellard | BlockDriverState *bs; |
485 | 81d0912d | bellard | |
486 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
487 | 81d0912d | bellard | it(opaque, bs->device_name); |
488 | 81d0912d | bellard | } |
489 | 81d0912d | bellard | } |
490 | 81d0912d | bellard | |
491 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
492 | ea2384d3 | bellard | { |
493 | ea2384d3 | bellard | return bs->device_name;
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494 | ea2384d3 | bellard | } |
495 | ea2384d3 | bellard | |
496 | b338082b | bellard | void bdrv_info(void) |
497 | b338082b | bellard | { |
498 | b338082b | bellard | BlockDriverState *bs; |
499 | b338082b | bellard | |
500 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
501 | b338082b | bellard | term_printf("%s:", bs->device_name);
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502 | b338082b | bellard | term_printf(" type=");
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503 | b338082b | bellard | switch(bs->type) {
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504 | b338082b | bellard | case BDRV_TYPE_HD:
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505 | b338082b | bellard | term_printf("hd");
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506 | b338082b | bellard | break;
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507 | b338082b | bellard | case BDRV_TYPE_CDROM:
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508 | b338082b | bellard | term_printf("cdrom");
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509 | b338082b | bellard | break;
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510 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
511 | b338082b | bellard | term_printf("floppy");
|
512 | b338082b | bellard | break;
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513 | b338082b | bellard | } |
514 | b338082b | bellard | term_printf(" removable=%d", bs->removable);
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515 | b338082b | bellard | if (bs->removable) {
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516 | b338082b | bellard | term_printf(" locked=%d", bs->locked);
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517 | b338082b | bellard | } |
518 | b338082b | bellard | if (bs->inserted) {
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519 | b338082b | bellard | term_printf(" file=%s", bs->filename);
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520 | ea2384d3 | bellard | if (bs->backing_file[0] != '\0') |
521 | ea2384d3 | bellard | term_printf(" backing_file=%s", bs->backing_file);
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522 | b338082b | bellard | term_printf(" ro=%d", bs->read_only);
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523 | ea2384d3 | bellard | term_printf(" drv=%s", bs->drv->format_name);
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524 | ea2384d3 | bellard | if (bs->encrypted)
|
525 | ea2384d3 | bellard | term_printf(" encrypted");
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526 | b338082b | bellard | } else {
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527 | b338082b | bellard | term_printf(" [not inserted]");
|
528 | b338082b | bellard | } |
529 | b338082b | bellard | term_printf("\n");
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530 | b338082b | bellard | } |
531 | b338082b | bellard | } |
532 | ea2384d3 | bellard | |
533 | ea2384d3 | bellard | |
534 | ea2384d3 | bellard | /**************************************************************/
|
535 | ea2384d3 | bellard | /* RAW block driver */
|
536 | ea2384d3 | bellard | |
537 | ea2384d3 | bellard | typedef struct BDRVRawState { |
538 | ea2384d3 | bellard | int fd;
|
539 | ea2384d3 | bellard | } BDRVRawState; |
540 | ea2384d3 | bellard | |
541 | ea2384d3 | bellard | static int raw_probe(const uint8_t *buf, int buf_size, const char *filename) |
542 | ea2384d3 | bellard | { |
543 | ea2384d3 | bellard | return 1; /* maybe */ |
544 | ea2384d3 | bellard | } |
545 | ea2384d3 | bellard | |
546 | ea2384d3 | bellard | static int raw_open(BlockDriverState *bs, const char *filename) |
547 | ea2384d3 | bellard | { |
548 | ea2384d3 | bellard | BDRVRawState *s = bs->opaque; |
549 | ea2384d3 | bellard | int fd;
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550 | ea2384d3 | bellard | int64_t size; |
551 | e5484d33 | bellard | #ifdef _BSD
|
552 | e5484d33 | bellard | struct stat sb;
|
553 | e5484d33 | bellard | #endif
|
554 | ea2384d3 | bellard | |
555 | ea2384d3 | bellard | fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE); |
556 | ea2384d3 | bellard | if (fd < 0) { |
557 | ea2384d3 | bellard | fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE); |
558 | ea2384d3 | bellard | if (fd < 0) |
559 | ea2384d3 | bellard | return -1; |
560 | ea2384d3 | bellard | bs->read_only = 1;
|
561 | ea2384d3 | bellard | } |
562 | 7674e7bf | bellard | #ifdef _BSD
|
563 | e5484d33 | bellard | if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
|
564 | 7674e7bf | bellard | #ifdef DIOCGMEDIASIZE
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565 | e5484d33 | bellard | if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
|
566 | 7674e7bf | bellard | #endif
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567 | e5484d33 | bellard | size = lseek(fd, 0LL, SEEK_END);
|
568 | 7674e7bf | bellard | } else
|
569 | 7674e7bf | bellard | #endif
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570 | 7674e7bf | bellard | { |
571 | 7674e7bf | bellard | size = lseek(fd, 0, SEEK_END);
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572 | 7674e7bf | bellard | } |
573 | c747cd1f | bellard | #ifdef _WIN32
|
574 | c747cd1f | bellard | /* On Windows hosts it can happen that we're unable to get file size
|
575 | c747cd1f | bellard | for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
|
576 | c747cd1f | bellard | if (size == -1) |
577 | c747cd1f | bellard | size = LONG_LONG_MAX; |
578 | c747cd1f | bellard | #endif
|
579 | ea2384d3 | bellard | bs->total_sectors = size / 512;
|
580 | ea2384d3 | bellard | s->fd = fd; |
581 | ea2384d3 | bellard | return 0; |
582 | ea2384d3 | bellard | } |
583 | ea2384d3 | bellard | |
584 | ea2384d3 | bellard | static int raw_read(BlockDriverState *bs, int64_t sector_num, |
585 | ea2384d3 | bellard | uint8_t *buf, int nb_sectors)
|
586 | ea2384d3 | bellard | { |
587 | ea2384d3 | bellard | BDRVRawState *s = bs->opaque; |
588 | ea2384d3 | bellard | int ret;
|
589 | ea2384d3 | bellard | |
590 | d5249393 | bellard | lseek(s->fd, sector_num * 512, SEEK_SET);
|
591 | ea2384d3 | bellard | ret = read(s->fd, buf, nb_sectors * 512);
|
592 | ea2384d3 | bellard | if (ret != nb_sectors * 512) |
593 | ea2384d3 | bellard | return -1; |
594 | ea2384d3 | bellard | return 0; |
595 | ea2384d3 | bellard | } |
596 | ea2384d3 | bellard | |
597 | ea2384d3 | bellard | static int raw_write(BlockDriverState *bs, int64_t sector_num, |
598 | ea2384d3 | bellard | const uint8_t *buf, int nb_sectors) |
599 | ea2384d3 | bellard | { |
600 | ea2384d3 | bellard | BDRVRawState *s = bs->opaque; |
601 | ea2384d3 | bellard | int ret;
|
602 | ea2384d3 | bellard | |
603 | d5249393 | bellard | lseek(s->fd, sector_num * 512, SEEK_SET);
|
604 | ea2384d3 | bellard | ret = write(s->fd, buf, nb_sectors * 512);
|
605 | ea2384d3 | bellard | if (ret != nb_sectors * 512) |
606 | ea2384d3 | bellard | return -1; |
607 | ea2384d3 | bellard | return 0; |
608 | ea2384d3 | bellard | } |
609 | ea2384d3 | bellard | |
610 | e2731add | bellard | static void raw_close(BlockDriverState *bs) |
611 | ea2384d3 | bellard | { |
612 | ea2384d3 | bellard | BDRVRawState *s = bs->opaque; |
613 | ea2384d3 | bellard | close(s->fd); |
614 | ea2384d3 | bellard | } |
615 | ea2384d3 | bellard | |
616 | ea2384d3 | bellard | static int raw_create(const char *filename, int64_t total_size, |
617 | ea2384d3 | bellard | const char *backing_file, int flags) |
618 | ea2384d3 | bellard | { |
619 | ea2384d3 | bellard | int fd;
|
620 | ea2384d3 | bellard | |
621 | ea2384d3 | bellard | if (flags || backing_file)
|
622 | ea2384d3 | bellard | return -ENOTSUP;
|
623 | ea2384d3 | bellard | |
624 | ea2384d3 | bellard | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
625 | ea2384d3 | bellard | 0644);
|
626 | ea2384d3 | bellard | if (fd < 0) |
627 | ea2384d3 | bellard | return -EIO;
|
628 | d5249393 | bellard | ftruncate(fd, total_size * 512);
|
629 | ea2384d3 | bellard | close(fd); |
630 | ea2384d3 | bellard | return 0; |
631 | ea2384d3 | bellard | } |
632 | ea2384d3 | bellard | |
633 | ea2384d3 | bellard | BlockDriver bdrv_raw = { |
634 | ea2384d3 | bellard | "raw",
|
635 | ea2384d3 | bellard | sizeof(BDRVRawState),
|
636 | ea2384d3 | bellard | raw_probe, |
637 | ea2384d3 | bellard | raw_open, |
638 | ea2384d3 | bellard | raw_read, |
639 | ea2384d3 | bellard | raw_write, |
640 | ea2384d3 | bellard | raw_close, |
641 | ea2384d3 | bellard | raw_create, |
642 | ea2384d3 | bellard | }; |
643 | ea2384d3 | bellard | |
644 | ea2384d3 | bellard | void bdrv_init(void) |
645 | ea2384d3 | bellard | { |
646 | ea2384d3 | bellard | bdrv_register(&bdrv_raw); |
647 | ea2384d3 | bellard | #ifndef _WIN32
|
648 | ea2384d3 | bellard | bdrv_register(&bdrv_cow); |
649 | ea2384d3 | bellard | #endif
|
650 | ea2384d3 | bellard | bdrv_register(&bdrv_qcow); |
651 | ea2384d3 | bellard | bdrv_register(&bdrv_vmdk); |
652 | 3c56521b | bellard | bdrv_register(&bdrv_cloop); |
653 | 585d0ed9 | bellard | bdrv_register(&bdrv_dmg); |
654 | a8753c34 | bellard | bdrv_register(&bdrv_bochs); |
655 | ea2384d3 | bellard | } |