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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 | 83f64091 | bellard | #define SECTOR_BITS 9 |
36 | 83f64091 | bellard | #define SECTOR_SIZE (1 << SECTOR_BITS) |
37 | 83f64091 | bellard | |
38 | 83f64091 | bellard | static int bdrv_aio_new_em(BlockDriverAIOCB *acb); |
39 | 83f64091 | bellard | static int bdrv_aio_read_em(BlockDriverAIOCB *acb, int64_t sector_num, |
40 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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41 | 83f64091 | bellard | static int bdrv_aio_write_em(BlockDriverAIOCB *acb, int64_t sector_num, |
42 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
43 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
44 | 83f64091 | bellard | static void bdrv_aio_delete_em(BlockDriverAIOCB *acb); |
45 | 83f64091 | bellard | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
46 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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47 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
48 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
49 | ec530c81 | bellard | |
50 | b338082b | bellard | static BlockDriverState *bdrv_first;
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51 | ea2384d3 | bellard | static BlockDriver *first_drv;
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52 | ea2384d3 | bellard | |
53 | 83f64091 | bellard | #ifdef _WIN32
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54 | 83f64091 | bellard | #define PATH_SEP '\\' |
55 | 83f64091 | bellard | #else
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56 | 83f64091 | bellard | #define PATH_SEP '/' |
57 | 83f64091 | bellard | #endif
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58 | 3b0d4f61 | bellard | |
59 | 83f64091 | bellard | int path_is_absolute(const char *path) |
60 | 3b0d4f61 | bellard | { |
61 | 83f64091 | bellard | const char *p; |
62 | 83f64091 | bellard | p = strchr(path, ':');
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63 | 83f64091 | bellard | if (p)
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64 | 83f64091 | bellard | p++; |
65 | 83f64091 | bellard | else
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66 | 83f64091 | bellard | p = path; |
67 | 83f64091 | bellard | return (*p == PATH_SEP);
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68 | 3b0d4f61 | bellard | } |
69 | 3b0d4f61 | bellard | |
70 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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71 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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72 | 83f64091 | bellard | supported. */
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73 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
74 | 83f64091 | bellard | const char *base_path, |
75 | 83f64091 | bellard | const char *filename) |
76 | 3b0d4f61 | bellard | { |
77 | 83f64091 | bellard | const char *p, *p1; |
78 | 83f64091 | bellard | int len;
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79 | 83f64091 | bellard | |
80 | 83f64091 | bellard | if (dest_size <= 0) |
81 | 83f64091 | bellard | return;
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82 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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83 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
84 | 83f64091 | bellard | } else {
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85 | 83f64091 | bellard | p = strchr(base_path, ':');
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86 | 83f64091 | bellard | if (p)
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87 | 83f64091 | bellard | p++; |
88 | 83f64091 | bellard | else
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89 | 83f64091 | bellard | p = base_path; |
90 | 83f64091 | bellard | p1 = strrchr(base_path, PATH_SEP); |
91 | 83f64091 | bellard | if (p1)
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92 | 83f64091 | bellard | p1++; |
93 | 83f64091 | bellard | else
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94 | 83f64091 | bellard | p1 = base_path; |
95 | 83f64091 | bellard | if (p1 > p)
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96 | 83f64091 | bellard | p = p1; |
97 | 83f64091 | bellard | len = p - base_path; |
98 | 83f64091 | bellard | if (len > dest_size - 1) |
99 | 83f64091 | bellard | len = dest_size - 1;
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100 | 83f64091 | bellard | memcpy(dest, base_path, len); |
101 | 83f64091 | bellard | dest[len] = '\0';
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102 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
103 | 3b0d4f61 | bellard | } |
104 | 3b0d4f61 | bellard | } |
105 | 3b0d4f61 | bellard | |
106 | 3b0d4f61 | bellard | |
107 | ea2384d3 | bellard | void bdrv_register(BlockDriver *bdrv)
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108 | ea2384d3 | bellard | { |
109 | 83f64091 | bellard | if (!bdrv->bdrv_aio_new) {
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110 | 83f64091 | bellard | /* add AIO emulation layer */
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111 | 83f64091 | bellard | bdrv->bdrv_aio_new = bdrv_aio_new_em; |
112 | 83f64091 | bellard | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
113 | 83f64091 | bellard | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
114 | 83f64091 | bellard | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
115 | 83f64091 | bellard | bdrv->bdrv_aio_delete = bdrv_aio_delete_em; |
116 | 83f64091 | bellard | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
117 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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118 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
119 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
120 | 83f64091 | bellard | } |
121 | ea2384d3 | bellard | bdrv->next = first_drv; |
122 | ea2384d3 | bellard | first_drv = bdrv; |
123 | ea2384d3 | bellard | } |
124 | b338082b | bellard | |
125 | b338082b | bellard | /* create a new block device (by default it is empty) */
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126 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
127 | b338082b | bellard | { |
128 | b338082b | bellard | BlockDriverState **pbs, *bs; |
129 | b338082b | bellard | |
130 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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131 | b338082b | bellard | if(!bs)
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132 | b338082b | bellard | return NULL; |
133 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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134 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
135 | ea2384d3 | bellard | /* insert at the end */
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136 | ea2384d3 | bellard | pbs = &bdrv_first; |
137 | ea2384d3 | bellard | while (*pbs != NULL) |
138 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
139 | ea2384d3 | bellard | *pbs = bs; |
140 | ea2384d3 | bellard | } |
141 | b338082b | bellard | return bs;
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142 | b338082b | bellard | } |
143 | b338082b | bellard | |
144 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
145 | ea2384d3 | bellard | { |
146 | ea2384d3 | bellard | BlockDriver *drv1; |
147 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
148 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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149 | ea2384d3 | bellard | return drv1;
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150 | ea2384d3 | bellard | } |
151 | ea2384d3 | bellard | return NULL; |
152 | ea2384d3 | bellard | } |
153 | ea2384d3 | bellard | |
154 | ea2384d3 | bellard | int bdrv_create(BlockDriver *drv,
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155 | ea2384d3 | bellard | const char *filename, int64_t size_in_sectors, |
156 | ea2384d3 | bellard | const char *backing_file, int flags) |
157 | ea2384d3 | bellard | { |
158 | ea2384d3 | bellard | if (!drv->bdrv_create)
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159 | ea2384d3 | bellard | return -ENOTSUP;
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160 | ea2384d3 | bellard | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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161 | ea2384d3 | bellard | } |
162 | ea2384d3 | bellard | |
163 | d5249393 | bellard | #ifdef _WIN32
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164 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
165 | d5249393 | bellard | { |
166 | 83f64091 | bellard | tmpnam(filename); |
167 | d5249393 | bellard | } |
168 | d5249393 | bellard | #else
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169 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
170 | fc01f7e7 | bellard | { |
171 | 67b915a5 | bellard | int fd;
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172 | d5249393 | bellard | /* XXX: race condition possible */
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173 | ea2384d3 | bellard | pstrcpy(filename, size, "/tmp/vl.XXXXXX");
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174 | ea2384d3 | bellard | fd = mkstemp(filename); |
175 | ea2384d3 | bellard | close(fd); |
176 | ea2384d3 | bellard | } |
177 | d5249393 | bellard | #endif
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178 | fc01f7e7 | bellard | |
179 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
180 | 83f64091 | bellard | { |
181 | 83f64091 | bellard | BlockDriver *drv1; |
182 | 83f64091 | bellard | char protocol[128]; |
183 | 83f64091 | bellard | int len;
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184 | 83f64091 | bellard | const char *p; |
185 | 83f64091 | bellard | p = strchr(filename, ':');
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186 | 83f64091 | bellard | if (!p)
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187 | 83f64091 | bellard | return &bdrv_raw;
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188 | 83f64091 | bellard | len = p - filename; |
189 | 83f64091 | bellard | if (len > sizeof(protocol) - 1) |
190 | 83f64091 | bellard | len = sizeof(protocol) - 1; |
191 | 83f64091 | bellard | #ifdef _WIN32
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192 | 83f64091 | bellard | if (len == 1) { |
193 | 83f64091 | bellard | /* specific win32 case for driver letters */
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194 | 83f64091 | bellard | return &bdrv_raw;
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195 | 83f64091 | bellard | } |
196 | 83f64091 | bellard | #endif
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197 | 83f64091 | bellard | memcpy(protocol, filename, len); |
198 | 83f64091 | bellard | protocol[len] = '\0';
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199 | 83f64091 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
200 | 83f64091 | bellard | if (drv1->protocol_name &&
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201 | 83f64091 | bellard | !strcmp(drv1->protocol_name, protocol)) |
202 | 83f64091 | bellard | return drv1;
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203 | 83f64091 | bellard | } |
204 | 83f64091 | bellard | return NULL; |
205 | 83f64091 | bellard | } |
206 | 83f64091 | bellard | |
207 | 7674e7bf | bellard | /* XXX: force raw format if block or character device ? It would
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208 | 7674e7bf | bellard | simplify the BSD case */
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209 | ea2384d3 | bellard | static BlockDriver *find_image_format(const char *filename) |
210 | ea2384d3 | bellard | { |
211 | 83f64091 | bellard | int ret, score, score_max;
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212 | ea2384d3 | bellard | BlockDriver *drv1, *drv; |
213 | 83f64091 | bellard | uint8_t buf[2048];
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214 | 83f64091 | bellard | BlockDriverState *bs; |
215 | ea2384d3 | bellard | |
216 | 83f64091 | bellard | drv = find_protocol(filename); |
217 | 83f64091 | bellard | /* no need to test disk image formats for vvfat or host specific
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218 | 83f64091 | bellard | devices */
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219 | 83f64091 | bellard | if (drv == &bdrv_vvfat)
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220 | 83f64091 | bellard | return drv;
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221 | 83f64091 | bellard | if (strstart(filename, "/dev/", NULL)) |
222 | 83f64091 | bellard | return &bdrv_raw;
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223 | 83f64091 | bellard | |
224 | 83f64091 | bellard | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
225 | 83f64091 | bellard | if (ret < 0) |
226 | 83f64091 | bellard | return NULL; |
227 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
228 | 83f64091 | bellard | bdrv_delete(bs); |
229 | 83f64091 | bellard | if (ret < 0) { |
230 | 83f64091 | bellard | return NULL; |
231 | 83f64091 | bellard | } |
232 | 83f64091 | bellard | |
233 | ea2384d3 | bellard | score_max = 0;
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234 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
235 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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236 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
237 | 83f64091 | bellard | if (score > score_max) {
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238 | 83f64091 | bellard | score_max = score; |
239 | 83f64091 | bellard | drv = drv1; |
240 | 83f64091 | bellard | } |
241 | 0849bf08 | bellard | } |
242 | fc01f7e7 | bellard | } |
243 | ea2384d3 | bellard | return drv;
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244 | ea2384d3 | bellard | } |
245 | ea2384d3 | bellard | |
246 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
247 | ea2384d3 | bellard | { |
248 | 83f64091 | bellard | BlockDriverState *bs; |
249 | 83f64091 | bellard | int ret;
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250 | 83f64091 | bellard | |
251 | 83f64091 | bellard | bs = bdrv_new("");
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252 | 83f64091 | bellard | if (!bs)
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253 | 83f64091 | bellard | return -ENOMEM;
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254 | 83f64091 | bellard | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
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255 | 83f64091 | bellard | if (ret < 0) { |
256 | 83f64091 | bellard | bdrv_delete(bs); |
257 | 83f64091 | bellard | return ret;
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258 | 3b0d4f61 | bellard | } |
259 | 83f64091 | bellard | *pbs = bs; |
260 | 83f64091 | bellard | return 0; |
261 | 83f64091 | bellard | } |
262 | 83f64091 | bellard | |
263 | 83f64091 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
264 | 83f64091 | bellard | { |
265 | 83f64091 | bellard | return bdrv_open2(bs, filename, flags, NULL); |
266 | ea2384d3 | bellard | } |
267 | ea2384d3 | bellard | |
268 | 83f64091 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
269 | ea2384d3 | bellard | BlockDriver *drv) |
270 | ea2384d3 | bellard | { |
271 | 83f64091 | bellard | int ret, open_flags;
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272 | ea2384d3 | bellard | char tmp_filename[1024]; |
273 | 83f64091 | bellard | char backing_filename[1024]; |
274 | ea2384d3 | bellard | |
275 | ea2384d3 | bellard | bs->read_only = 0;
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276 | ea2384d3 | bellard | bs->is_temporary = 0;
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277 | ea2384d3 | bellard | bs->encrypted = 0;
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278 | 712e7874 | bellard | |
279 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
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280 | ea2384d3 | bellard | BlockDriverState *bs1; |
281 | ea2384d3 | bellard | int64_t total_size; |
282 | ea2384d3 | bellard | |
283 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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284 | ea2384d3 | bellard | instead of opening 'filename' directly */
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285 | 33e3963e | bellard | |
286 | ea2384d3 | bellard | /* if there is a backing file, use it */
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287 | ea2384d3 | bellard | bs1 = bdrv_new("");
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288 | ea2384d3 | bellard | if (!bs1) {
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289 | 83f64091 | bellard | return -ENOMEM;
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290 | ea2384d3 | bellard | } |
291 | ea2384d3 | bellard | if (bdrv_open(bs1, filename, 0) < 0) { |
292 | ea2384d3 | bellard | bdrv_delete(bs1); |
293 | ea2384d3 | bellard | return -1; |
294 | ea2384d3 | bellard | } |
295 | 83f64091 | bellard | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
296 | ea2384d3 | bellard | bdrv_delete(bs1); |
297 | ea2384d3 | bellard | |
298 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
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299 | ea2384d3 | bellard | if (bdrv_create(&bdrv_qcow, tmp_filename,
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300 | ea2384d3 | bellard | total_size, filename, 0) < 0) { |
301 | ea2384d3 | bellard | return -1; |
302 | ea2384d3 | bellard | } |
303 | ea2384d3 | bellard | filename = tmp_filename; |
304 | ea2384d3 | bellard | bs->is_temporary = 1;
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305 | ea2384d3 | bellard | } |
306 | 712e7874 | bellard | |
307 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
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308 | 83f64091 | bellard | if (flags & BDRV_O_FILE) {
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309 | 83f64091 | bellard | drv = find_protocol(filename); |
310 | ea2384d3 | bellard | if (!drv)
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311 | 83f64091 | bellard | return -ENOENT;
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312 | 83f64091 | bellard | } else {
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313 | 83f64091 | bellard | if (!drv) {
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314 | 83f64091 | bellard | drv = find_image_format(filename); |
315 | 83f64091 | bellard | if (!drv)
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316 | 83f64091 | bellard | return -1; |
317 | 83f64091 | bellard | } |
318 | ea2384d3 | bellard | } |
319 | ea2384d3 | bellard | bs->drv = drv; |
320 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
321 | ea2384d3 | bellard | if (bs->opaque == NULL && drv->instance_size > 0) |
322 | ea2384d3 | bellard | return -1; |
323 | 83f64091 | bellard | /* Note: for compatibility, we open disk image files as RDWR, and
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324 | 83f64091 | bellard | RDONLY as fallback */
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325 | 83f64091 | bellard | if (!(flags & BDRV_O_FILE))
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326 | 83f64091 | bellard | open_flags = BDRV_O_RDWR; |
327 | 83f64091 | bellard | else
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328 | 83f64091 | bellard | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
329 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, open_flags); |
330 | 83f64091 | bellard | if (ret == -EACCES && !(flags & BDRV_O_FILE)) {
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331 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY); |
332 | 83f64091 | bellard | bs->read_only = 1;
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333 | 83f64091 | bellard | } |
334 | ea2384d3 | bellard | if (ret < 0) { |
335 | ea2384d3 | bellard | qemu_free(bs->opaque); |
336 | 83f64091 | bellard | return ret;
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337 | 33e3963e | bellard | } |
338 | 83f64091 | bellard | |
339 | 67b915a5 | bellard | #ifndef _WIN32
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340 | ea2384d3 | bellard | if (bs->is_temporary) {
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341 | ea2384d3 | bellard | unlink(filename); |
342 | ea2384d3 | bellard | } |
343 | ea2384d3 | bellard | #endif
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344 | 83f64091 | bellard | if (bs->backing_file[0] != '\0') { |
345 | ea2384d3 | bellard | /* if there is a backing file, use it */
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346 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
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347 | ea2384d3 | bellard | if (!bs->backing_hd) {
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348 | ea2384d3 | bellard | fail:
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349 | ea2384d3 | bellard | bdrv_close(bs); |
350 | ea2384d3 | bellard | return -1; |
351 | 33e3963e | bellard | } |
352 | 83f64091 | bellard | path_combine(backing_filename, sizeof(backing_filename),
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353 | 83f64091 | bellard | filename, bs->backing_file); |
354 | 83f64091 | bellard | if (bdrv_open(bs->backing_hd, backing_filename, 0) < 0) |
355 | 33e3963e | bellard | goto fail;
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356 | 33e3963e | bellard | } |
357 | 33e3963e | bellard | |
358 | b338082b | bellard | bs->inserted = 1;
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359 | b338082b | bellard | |
360 | b338082b | bellard | /* call the change callback */
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361 | b338082b | bellard | if (bs->change_cb)
|
362 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
363 | b338082b | bellard | |
364 | b338082b | bellard | return 0; |
365 | fc01f7e7 | bellard | } |
366 | fc01f7e7 | bellard | |
367 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
368 | fc01f7e7 | bellard | { |
369 | b338082b | bellard | if (bs->inserted) {
|
370 | ea2384d3 | bellard | if (bs->backing_hd)
|
371 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
372 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
373 | ea2384d3 | bellard | qemu_free(bs->opaque); |
374 | ea2384d3 | bellard | #ifdef _WIN32
|
375 | ea2384d3 | bellard | if (bs->is_temporary) {
|
376 | ea2384d3 | bellard | unlink(bs->filename); |
377 | ea2384d3 | bellard | } |
378 | 67b915a5 | bellard | #endif
|
379 | ea2384d3 | bellard | bs->opaque = NULL;
|
380 | ea2384d3 | bellard | bs->drv = NULL;
|
381 | b338082b | bellard | bs->inserted = 0;
|
382 | b338082b | bellard | |
383 | b338082b | bellard | /* call the change callback */
|
384 | b338082b | bellard | if (bs->change_cb)
|
385 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
386 | b338082b | bellard | } |
387 | b338082b | bellard | } |
388 | b338082b | bellard | |
389 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
390 | b338082b | bellard | { |
391 | ea2384d3 | bellard | /* XXX: remove the driver list */
|
392 | b338082b | bellard | bdrv_close(bs); |
393 | b338082b | bellard | qemu_free(bs); |
394 | fc01f7e7 | bellard | } |
395 | fc01f7e7 | bellard | |
396 | 33e3963e | bellard | /* commit COW file into the raw image */
|
397 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
398 | 33e3963e | bellard | { |
399 | 83f64091 | bellard | int64_t i, total_sectors; |
400 | ea2384d3 | bellard | int n, j;
|
401 | ea2384d3 | bellard | unsigned char sector[512]; |
402 | 33e3963e | bellard | |
403 | b338082b | bellard | if (!bs->inserted)
|
404 | ea2384d3 | bellard | return -ENOENT;
|
405 | 33e3963e | bellard | |
406 | 33e3963e | bellard | if (bs->read_only) {
|
407 | ea2384d3 | bellard | return -EACCES;
|
408 | 33e3963e | bellard | } |
409 | 33e3963e | bellard | |
410 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
411 | ea2384d3 | bellard | return -ENOTSUP;
|
412 | ea2384d3 | bellard | } |
413 | 33e3963e | bellard | |
414 | 83f64091 | bellard | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
415 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
416 | ea2384d3 | bellard | if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
417 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
418 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
419 | ea2384d3 | bellard | return -EIO;
|
420 | ea2384d3 | bellard | } |
421 | ea2384d3 | bellard | |
422 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
423 | ea2384d3 | bellard | return -EIO;
|
424 | ea2384d3 | bellard | } |
425 | ea2384d3 | bellard | i++; |
426 | 33e3963e | bellard | } |
427 | ea2384d3 | bellard | } else {
|
428 | ea2384d3 | bellard | i += n; |
429 | ea2384d3 | bellard | } |
430 | 33e3963e | bellard | } |
431 | 95389c86 | bellard | |
432 | 95389c86 | bellard | if (bs->drv->bdrv_make_empty)
|
433 | 95389c86 | bellard | return bs->drv->bdrv_make_empty(bs);
|
434 | 95389c86 | bellard | |
435 | 33e3963e | bellard | return 0; |
436 | 33e3963e | bellard | } |
437 | 33e3963e | bellard | |
438 | 83f64091 | bellard | /* return < 0 if error */
|
439 | fc01f7e7 | bellard | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
440 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
441 | fc01f7e7 | bellard | { |
442 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
443 | ea2384d3 | bellard | |
444 | b338082b | bellard | if (!bs->inserted)
|
445 | b338082b | bellard | return -1; |
446 | b338082b | bellard | |
447 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
448 | cf98951b | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
449 | 83f64091 | bellard | sector_num++; |
450 | 83f64091 | bellard | nb_sectors--; |
451 | 83f64091 | bellard | buf += 512;
|
452 | 83f64091 | bellard | if (nb_sectors == 0) |
453 | 83f64091 | bellard | return 0; |
454 | 83f64091 | bellard | } |
455 | 83f64091 | bellard | if (drv->bdrv_pread) {
|
456 | 83f64091 | bellard | int ret, len;
|
457 | 83f64091 | bellard | len = nb_sectors * 512;
|
458 | 83f64091 | bellard | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len);
|
459 | 83f64091 | bellard | if (ret < 0) |
460 | 83f64091 | bellard | return ret;
|
461 | 83f64091 | bellard | else if (ret != len) |
462 | 83f64091 | bellard | return -EIO;
|
463 | 83f64091 | bellard | else
|
464 | 83f64091 | bellard | return 0; |
465 | 83f64091 | bellard | } else {
|
466 | 83f64091 | bellard | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
467 | 33e3963e | bellard | } |
468 | fc01f7e7 | bellard | } |
469 | fc01f7e7 | bellard | |
470 | 83f64091 | bellard | /* return < 0 if error */
|
471 | fc01f7e7 | bellard | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
472 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
473 | fc01f7e7 | bellard | { |
474 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
475 | b338082b | bellard | if (!bs->inserted)
|
476 | b338082b | bellard | return -1; |
477 | 0849bf08 | bellard | if (bs->read_only)
|
478 | 0849bf08 | bellard | return -1; |
479 | 79639d42 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
480 | 79639d42 | bellard | memcpy(bs->boot_sector_data, buf, 512);
|
481 | 79639d42 | bellard | } |
482 | 83f64091 | bellard | if (drv->bdrv_pwrite) {
|
483 | 83f64091 | bellard | int ret, len;
|
484 | 83f64091 | bellard | len = nb_sectors * 512;
|
485 | 83f64091 | bellard | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len);
|
486 | 83f64091 | bellard | if (ret < 0) |
487 | 83f64091 | bellard | return ret;
|
488 | 83f64091 | bellard | else if (ret != len) |
489 | 83f64091 | bellard | return -EIO;
|
490 | 83f64091 | bellard | else
|
491 | 83f64091 | bellard | return 0; |
492 | 83f64091 | bellard | } else {
|
493 | 83f64091 | bellard | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
494 | 83f64091 | bellard | } |
495 | 83f64091 | bellard | } |
496 | 83f64091 | bellard | |
497 | 83f64091 | bellard | #if 0
|
498 | 83f64091 | bellard | /* not necessary now */
|
499 | 83f64091 | bellard | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset,
|
500 | 83f64091 | bellard | void *buf1, int count1)
|
501 | 83f64091 | bellard | {
|
502 | 83f64091 | bellard | uint8_t *buf = buf1;
|
503 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE];
|
504 | 83f64091 | bellard | int len, nb_sectors, count;
|
505 | 83f64091 | bellard | int64_t sector_num;
|
506 | 83f64091 | bellard | |
507 | 83f64091 | bellard | count = count1;
|
508 | 83f64091 | bellard | /* first read to align to sector start */
|
509 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
510 | 83f64091 | bellard | if (len > count)
|
511 | 83f64091 | bellard | len = count;
|
512 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS;
|
513 | 83f64091 | bellard | if (len > 0) {
|
514 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
|
515 | 83f64091 | bellard | return -EIO;
|
516 | 83f64091 | bellard | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
|
517 | 83f64091 | bellard | count -= len;
|
518 | 83f64091 | bellard | if (count == 0)
|
519 | 83f64091 | bellard | return count1;
|
520 | 83f64091 | bellard | sector_num++;
|
521 | 83f64091 | bellard | buf += len;
|
522 | 83f64091 | bellard | }
|
523 | 83f64091 | bellard | |
524 | 83f64091 | bellard | /* read the sectors "in place" */
|
525 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS;
|
526 | 83f64091 | bellard | if (nb_sectors > 0) {
|
527 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0)
|
528 | 83f64091 | bellard | return -EIO;
|
529 | 83f64091 | bellard | sector_num += nb_sectors;
|
530 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS;
|
531 | 83f64091 | bellard | buf += len;
|
532 | 83f64091 | bellard | count -= len;
|
533 | 83f64091 | bellard | }
|
534 | 83f64091 | bellard | |
535 | 83f64091 | bellard | /* add data from the last sector */
|
536 | 83f64091 | bellard | if (count > 0) {
|
537 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
|
538 | 83f64091 | bellard | return -EIO;
|
539 | 83f64091 | bellard | memcpy(buf, tmp_buf, count);
|
540 | 83f64091 | bellard | }
|
541 | 83f64091 | bellard | return count1;
|
542 | 83f64091 | bellard | }
|
543 | 83f64091 | bellard | |
544 | 83f64091 | bellard | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset,
|
545 | 83f64091 | bellard | const void *buf1, int count1)
|
546 | 83f64091 | bellard | {
|
547 | 83f64091 | bellard | const uint8_t *buf = buf1;
|
548 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE];
|
549 | 83f64091 | bellard | int len, nb_sectors, count;
|
550 | 83f64091 | bellard | int64_t sector_num;
|
551 | 83f64091 | bellard | |
552 | 83f64091 | bellard | count = count1;
|
553 | 83f64091 | bellard | /* first write to align to sector start */
|
554 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
555 | 83f64091 | bellard | if (len > count)
|
556 | 83f64091 | bellard | len = count;
|
557 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS;
|
558 | 83f64091 | bellard | if (len > 0) {
|
559 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
|
560 | 83f64091 | bellard | return -EIO;
|
561 | 83f64091 | bellard | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len);
|
562 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0)
|
563 | 83f64091 | bellard | return -EIO;
|
564 | 83f64091 | bellard | count -= len;
|
565 | 83f64091 | bellard | if (count == 0)
|
566 | 83f64091 | bellard | return count1;
|
567 | 83f64091 | bellard | sector_num++;
|
568 | 83f64091 | bellard | buf += len;
|
569 | 83f64091 | bellard | }
|
570 | 83f64091 | bellard | |
571 | 83f64091 | bellard | /* write the sectors "in place" */
|
572 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS;
|
573 | 83f64091 | bellard | if (nb_sectors > 0) {
|
574 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0)
|
575 | 83f64091 | bellard | return -EIO;
|
576 | 83f64091 | bellard | sector_num += nb_sectors;
|
577 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS;
|
578 | 83f64091 | bellard | buf += len;
|
579 | 83f64091 | bellard | count -= len;
|
580 | 83f64091 | bellard | }
|
581 | 83f64091 | bellard | |
582 | 83f64091 | bellard | /* add data from the last sector */
|
583 | 83f64091 | bellard | if (count > 0) {
|
584 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
|
585 | 83f64091 | bellard | return -EIO;
|
586 | 83f64091 | bellard | memcpy(tmp_buf, buf, count);
|
587 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0)
|
588 | 83f64091 | bellard | return -EIO;
|
589 | 83f64091 | bellard | }
|
590 | 83f64091 | bellard | return count1;
|
591 | 83f64091 | bellard | }
|
592 | 83f64091 | bellard | #endif
|
593 | 83f64091 | bellard | |
594 | 83f64091 | bellard | /**
|
595 | 83f64091 | bellard | * Read with byte offsets (needed only for file protocols)
|
596 | 83f64091 | bellard | */
|
597 | 83f64091 | bellard | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
598 | 83f64091 | bellard | void *buf1, int count1) |
599 | 83f64091 | bellard | { |
600 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
601 | 83f64091 | bellard | |
602 | 83f64091 | bellard | if (!drv)
|
603 | 83f64091 | bellard | return -ENOENT;
|
604 | 83f64091 | bellard | if (!drv->bdrv_pread)
|
605 | 83f64091 | bellard | return -ENOTSUP;
|
606 | 83f64091 | bellard | return drv->bdrv_pread(bs, offset, buf1, count1);
|
607 | 83f64091 | bellard | } |
608 | 83f64091 | bellard | |
609 | 83f64091 | bellard | /**
|
610 | 83f64091 | bellard | * Write with byte offsets (needed only for file protocols)
|
611 | 83f64091 | bellard | */
|
612 | 83f64091 | bellard | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
613 | 83f64091 | bellard | const void *buf1, int count1) |
614 | 83f64091 | bellard | { |
615 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
616 | 83f64091 | bellard | |
617 | 83f64091 | bellard | if (!drv)
|
618 | 83f64091 | bellard | return -ENOENT;
|
619 | 83f64091 | bellard | if (!drv->bdrv_pwrite)
|
620 | 83f64091 | bellard | return -ENOTSUP;
|
621 | 83f64091 | bellard | return drv->bdrv_pwrite(bs, offset, buf1, count1);
|
622 | 83f64091 | bellard | } |
623 | 83f64091 | bellard | |
624 | 83f64091 | bellard | /**
|
625 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
626 | 83f64091 | bellard | */
|
627 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
628 | 83f64091 | bellard | { |
629 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
630 | 83f64091 | bellard | if (!drv)
|
631 | 83f64091 | bellard | return -ENOENT;
|
632 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
633 | 83f64091 | bellard | return -ENOTSUP;
|
634 | 83f64091 | bellard | return drv->bdrv_truncate(bs, offset);
|
635 | 83f64091 | bellard | } |
636 | 83f64091 | bellard | |
637 | 83f64091 | bellard | /**
|
638 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
639 | 83f64091 | bellard | */
|
640 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
641 | 83f64091 | bellard | { |
642 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
643 | 83f64091 | bellard | if (!drv)
|
644 | 83f64091 | bellard | return -ENOENT;
|
645 | 83f64091 | bellard | if (!drv->bdrv_getlength) {
|
646 | 83f64091 | bellard | /* legacy mode */
|
647 | 83f64091 | bellard | return bs->total_sectors * SECTOR_SIZE;
|
648 | 83f64091 | bellard | } |
649 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
650 | fc01f7e7 | bellard | } |
651 | fc01f7e7 | bellard | |
652 | fc01f7e7 | bellard | void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
|
653 | fc01f7e7 | bellard | { |
654 | 83f64091 | bellard | int64_t size; |
655 | 83f64091 | bellard | size = bdrv_getlength(bs); |
656 | 83f64091 | bellard | if (size < 0) |
657 | 83f64091 | bellard | size = 0;
|
658 | 83f64091 | bellard | *nb_sectors_ptr = size >> SECTOR_BITS; |
659 | fc01f7e7 | bellard | } |
660 | cf98951b | bellard | |
661 | cf98951b | bellard | /* force a given boot sector. */
|
662 | cf98951b | bellard | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
663 | cf98951b | bellard | { |
664 | cf98951b | bellard | bs->boot_sector_enabled = 1;
|
665 | cf98951b | bellard | if (size > 512) |
666 | cf98951b | bellard | size = 512;
|
667 | cf98951b | bellard | memcpy(bs->boot_sector_data, data, size); |
668 | cf98951b | bellard | memset(bs->boot_sector_data + size, 0, 512 - size); |
669 | cf98951b | bellard | } |
670 | b338082b | bellard | |
671 | b338082b | bellard | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
672 | b338082b | bellard | int cyls, int heads, int secs) |
673 | b338082b | bellard | { |
674 | b338082b | bellard | bs->cyls = cyls; |
675 | b338082b | bellard | bs->heads = heads; |
676 | b338082b | bellard | bs->secs = secs; |
677 | b338082b | bellard | } |
678 | b338082b | bellard | |
679 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
680 | b338082b | bellard | { |
681 | b338082b | bellard | bs->type = type; |
682 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
683 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
684 | b338082b | bellard | } |
685 | b338082b | bellard | |
686 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
687 | 46d4767d | bellard | { |
688 | 46d4767d | bellard | bs->translation = translation; |
689 | 46d4767d | bellard | } |
690 | 46d4767d | bellard | |
691 | b338082b | bellard | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
692 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
693 | b338082b | bellard | { |
694 | b338082b | bellard | *pcyls = bs->cyls; |
695 | b338082b | bellard | *pheads = bs->heads; |
696 | b338082b | bellard | *psecs = bs->secs; |
697 | b338082b | bellard | } |
698 | b338082b | bellard | |
699 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
700 | b338082b | bellard | { |
701 | b338082b | bellard | return bs->type;
|
702 | b338082b | bellard | } |
703 | b338082b | bellard | |
704 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
705 | 46d4767d | bellard | { |
706 | 46d4767d | bellard | return bs->translation;
|
707 | 46d4767d | bellard | } |
708 | 46d4767d | bellard | |
709 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
710 | b338082b | bellard | { |
711 | b338082b | bellard | return bs->removable;
|
712 | b338082b | bellard | } |
713 | b338082b | bellard | |
714 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
715 | b338082b | bellard | { |
716 | b338082b | bellard | return bs->read_only;
|
717 | b338082b | bellard | } |
718 | b338082b | bellard | |
719 | b338082b | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
720 | b338082b | bellard | { |
721 | b338082b | bellard | return bs->inserted;
|
722 | b338082b | bellard | } |
723 | b338082b | bellard | |
724 | b338082b | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
725 | b338082b | bellard | { |
726 | b338082b | bellard | return bs->locked;
|
727 | b338082b | bellard | } |
728 | b338082b | bellard | |
729 | b338082b | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
730 | b338082b | bellard | { |
731 | b338082b | bellard | bs->locked = locked; |
732 | b338082b | bellard | } |
733 | b338082b | bellard | |
734 | b338082b | bellard | void bdrv_set_change_cb(BlockDriverState *bs,
|
735 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
736 | b338082b | bellard | { |
737 | b338082b | bellard | bs->change_cb = change_cb; |
738 | b338082b | bellard | bs->change_opaque = opaque; |
739 | b338082b | bellard | } |
740 | b338082b | bellard | |
741 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
742 | ea2384d3 | bellard | { |
743 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
744 | ea2384d3 | bellard | return 1; |
745 | ea2384d3 | bellard | return bs->encrypted;
|
746 | ea2384d3 | bellard | } |
747 | ea2384d3 | bellard | |
748 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
749 | ea2384d3 | bellard | { |
750 | ea2384d3 | bellard | int ret;
|
751 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
752 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
753 | ea2384d3 | bellard | if (ret < 0) |
754 | ea2384d3 | bellard | return ret;
|
755 | ea2384d3 | bellard | if (!bs->encrypted)
|
756 | ea2384d3 | bellard | return 0; |
757 | ea2384d3 | bellard | } |
758 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
759 | ea2384d3 | bellard | return -1; |
760 | ea2384d3 | bellard | return bs->drv->bdrv_set_key(bs, key);
|
761 | ea2384d3 | bellard | } |
762 | ea2384d3 | bellard | |
763 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
764 | ea2384d3 | bellard | { |
765 | ea2384d3 | bellard | if (!bs->inserted || !bs->drv) {
|
766 | ea2384d3 | bellard | buf[0] = '\0'; |
767 | ea2384d3 | bellard | } else {
|
768 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
769 | ea2384d3 | bellard | } |
770 | ea2384d3 | bellard | } |
771 | ea2384d3 | bellard | |
772 | ea2384d3 | bellard | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
773 | ea2384d3 | bellard | void *opaque)
|
774 | ea2384d3 | bellard | { |
775 | ea2384d3 | bellard | BlockDriver *drv; |
776 | ea2384d3 | bellard | |
777 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
778 | ea2384d3 | bellard | it(opaque, drv->format_name); |
779 | ea2384d3 | bellard | } |
780 | ea2384d3 | bellard | } |
781 | ea2384d3 | bellard | |
782 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
783 | b338082b | bellard | { |
784 | b338082b | bellard | BlockDriverState *bs; |
785 | b338082b | bellard | |
786 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
787 | b338082b | bellard | if (!strcmp(name, bs->device_name))
|
788 | b338082b | bellard | return bs;
|
789 | b338082b | bellard | } |
790 | b338082b | bellard | return NULL; |
791 | b338082b | bellard | } |
792 | b338082b | bellard | |
793 | 81d0912d | bellard | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
794 | 81d0912d | bellard | { |
795 | 81d0912d | bellard | BlockDriverState *bs; |
796 | 81d0912d | bellard | |
797 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
798 | 81d0912d | bellard | it(opaque, bs->device_name); |
799 | 81d0912d | bellard | } |
800 | 81d0912d | bellard | } |
801 | 81d0912d | bellard | |
802 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
803 | ea2384d3 | bellard | { |
804 | ea2384d3 | bellard | return bs->device_name;
|
805 | ea2384d3 | bellard | } |
806 | ea2384d3 | bellard | |
807 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
808 | 7a6cba61 | pbrook | { |
809 | 7a6cba61 | pbrook | if (bs->drv->bdrv_flush)
|
810 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
811 | 7a6cba61 | pbrook | if (bs->backing_hd)
|
812 | 7a6cba61 | pbrook | bdrv_flush(bs->backing_hd); |
813 | 7a6cba61 | pbrook | } |
814 | 7a6cba61 | pbrook | |
815 | b338082b | bellard | void bdrv_info(void) |
816 | b338082b | bellard | { |
817 | b338082b | bellard | BlockDriverState *bs; |
818 | b338082b | bellard | |
819 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
820 | b338082b | bellard | term_printf("%s:", bs->device_name);
|
821 | b338082b | bellard | term_printf(" type=");
|
822 | b338082b | bellard | switch(bs->type) {
|
823 | b338082b | bellard | case BDRV_TYPE_HD:
|
824 | b338082b | bellard | term_printf("hd");
|
825 | b338082b | bellard | break;
|
826 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
827 | b338082b | bellard | term_printf("cdrom");
|
828 | b338082b | bellard | break;
|
829 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
830 | b338082b | bellard | term_printf("floppy");
|
831 | b338082b | bellard | break;
|
832 | b338082b | bellard | } |
833 | b338082b | bellard | term_printf(" removable=%d", bs->removable);
|
834 | b338082b | bellard | if (bs->removable) {
|
835 | b338082b | bellard | term_printf(" locked=%d", bs->locked);
|
836 | b338082b | bellard | } |
837 | b338082b | bellard | if (bs->inserted) {
|
838 | b338082b | bellard | term_printf(" file=%s", bs->filename);
|
839 | ea2384d3 | bellard | if (bs->backing_file[0] != '\0') |
840 | ea2384d3 | bellard | term_printf(" backing_file=%s", bs->backing_file);
|
841 | b338082b | bellard | term_printf(" ro=%d", bs->read_only);
|
842 | ea2384d3 | bellard | term_printf(" drv=%s", bs->drv->format_name);
|
843 | ea2384d3 | bellard | if (bs->encrypted)
|
844 | ea2384d3 | bellard | term_printf(" encrypted");
|
845 | b338082b | bellard | } else {
|
846 | b338082b | bellard | term_printf(" [not inserted]");
|
847 | b338082b | bellard | } |
848 | b338082b | bellard | term_printf("\n");
|
849 | b338082b | bellard | } |
850 | b338082b | bellard | } |
851 | ea2384d3 | bellard | |
852 | 83f64091 | bellard | void bdrv_get_backing_filename(BlockDriverState *bs,
|
853 | 83f64091 | bellard | char *filename, int filename_size) |
854 | 83f64091 | bellard | { |
855 | 83f64091 | bellard | if (!bs->backing_hd) {
|
856 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
857 | 83f64091 | bellard | } else {
|
858 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
859 | 83f64091 | bellard | } |
860 | 83f64091 | bellard | } |
861 | 83f64091 | bellard | |
862 | 83f64091 | bellard | |
863 | ea2384d3 | bellard | /**************************************************************/
|
864 | 83f64091 | bellard | /* async I/Os */
|
865 | ea2384d3 | bellard | |
866 | 83f64091 | bellard | BlockDriverAIOCB *bdrv_aio_new(BlockDriverState *bs) |
867 | 83f64091 | bellard | { |
868 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
869 | 83f64091 | bellard | BlockDriverAIOCB *acb; |
870 | 83f64091 | bellard | acb = qemu_mallocz(sizeof(BlockDriverAIOCB));
|
871 | 83f64091 | bellard | if (!acb)
|
872 | 83f64091 | bellard | return NULL; |
873 | 83f64091 | bellard | |
874 | 83f64091 | bellard | acb->bs = bs; |
875 | 83f64091 | bellard | if (drv->bdrv_aio_new(acb) < 0) { |
876 | 83f64091 | bellard | qemu_free(acb); |
877 | 83f64091 | bellard | return NULL; |
878 | 83f64091 | bellard | } |
879 | 83f64091 | bellard | return acb;
|
880 | 83f64091 | bellard | } |
881 | ea2384d3 | bellard | |
882 | 83f64091 | bellard | int bdrv_aio_read(BlockDriverAIOCB *acb, int64_t sector_num,
|
883 | 83f64091 | bellard | uint8_t *buf, int nb_sectors,
|
884 | 83f64091 | bellard | BlockDriverCompletionFunc *cb, void *opaque)
|
885 | ea2384d3 | bellard | { |
886 | 83f64091 | bellard | BlockDriverState *bs = acb->bs; |
887 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
888 | 83f64091 | bellard | |
889 | 83f64091 | bellard | if (!bs->inserted)
|
890 | 83f64091 | bellard | return -1; |
891 | 83f64091 | bellard | |
892 | 83f64091 | bellard | /* XXX: we assume that nb_sectors == 0 is suppored by the async read */
|
893 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
894 | 83f64091 | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
895 | 83f64091 | bellard | sector_num++; |
896 | 83f64091 | bellard | nb_sectors--; |
897 | 83f64091 | bellard | buf += 512;
|
898 | 83f64091 | bellard | } |
899 | 83f64091 | bellard | |
900 | 83f64091 | bellard | acb->cb = cb; |
901 | 83f64091 | bellard | acb->cb_opaque = opaque; |
902 | 83f64091 | bellard | return drv->bdrv_aio_read(acb, sector_num, buf, nb_sectors);
|
903 | ea2384d3 | bellard | } |
904 | ea2384d3 | bellard | |
905 | 83f64091 | bellard | int bdrv_aio_write(BlockDriverAIOCB *acb, int64_t sector_num,
|
906 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors, |
907 | 83f64091 | bellard | BlockDriverCompletionFunc *cb, void *opaque)
|
908 | ea2384d3 | bellard | { |
909 | 83f64091 | bellard | BlockDriverState *bs = acb->bs; |
910 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
911 | ea2384d3 | bellard | |
912 | 83f64091 | bellard | if (!bs->inserted)
|
913 | ea2384d3 | bellard | return -1; |
914 | 83f64091 | bellard | if (bs->read_only)
|
915 | 83f64091 | bellard | return -1; |
916 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
917 | 83f64091 | bellard | memcpy(bs->boot_sector_data, buf, 512);
|
918 | ea2384d3 | bellard | } |
919 | 83f64091 | bellard | |
920 | 83f64091 | bellard | acb->cb = cb; |
921 | 83f64091 | bellard | acb->cb_opaque = opaque; |
922 | 83f64091 | bellard | return drv->bdrv_aio_write(acb, sector_num, buf, nb_sectors);
|
923 | 83f64091 | bellard | } |
924 | 83f64091 | bellard | |
925 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
926 | 7674e7bf | bellard | { |
927 | 83f64091 | bellard | BlockDriverState *bs = acb->bs; |
928 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
929 | 83f64091 | bellard | |
930 | 83f64091 | bellard | drv->bdrv_aio_cancel(acb); |
931 | 7674e7bf | bellard | } |
932 | 83f64091 | bellard | |
933 | 83f64091 | bellard | void bdrv_aio_delete(BlockDriverAIOCB *acb)
|
934 | 83f64091 | bellard | { |
935 | 83f64091 | bellard | BlockDriverState *bs = acb->bs; |
936 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
937 | 83f64091 | bellard | |
938 | 83f64091 | bellard | drv->bdrv_aio_delete(acb); |
939 | 83f64091 | bellard | qemu_free(acb); |
940 | 83f64091 | bellard | } |
941 | 83f64091 | bellard | |
942 | 83f64091 | bellard | /**************************************************************/
|
943 | 83f64091 | bellard | /* async block device emulation */
|
944 | 83f64091 | bellard | |
945 | 83f64091 | bellard | #ifdef QEMU_TOOL
|
946 | 83f64091 | bellard | static int bdrv_aio_new_em(BlockDriverAIOCB *acb) |
947 | 83f64091 | bellard | { |
948 | ea2384d3 | bellard | return 0; |
949 | ea2384d3 | bellard | } |
950 | ea2384d3 | bellard | |
951 | 83f64091 | bellard | static int bdrv_aio_read_em(BlockDriverAIOCB *acb, int64_t sector_num, |
952 | ea2384d3 | bellard | uint8_t *buf, int nb_sectors)
|
953 | ea2384d3 | bellard | { |
954 | ea2384d3 | bellard | int ret;
|
955 | 83f64091 | bellard | ret = bdrv_read(acb->bs, sector_num, buf, nb_sectors); |
956 | 83f64091 | bellard | acb->cb(acb->cb_opaque, ret); |
957 | ea2384d3 | bellard | return 0; |
958 | ea2384d3 | bellard | } |
959 | ea2384d3 | bellard | |
960 | 83f64091 | bellard | static int bdrv_aio_write_em(BlockDriverAIOCB *acb, int64_t sector_num, |
961 | ea2384d3 | bellard | const uint8_t *buf, int nb_sectors) |
962 | ea2384d3 | bellard | { |
963 | ea2384d3 | bellard | int ret;
|
964 | 83f64091 | bellard | ret = bdrv_write(acb->bs, sector_num, buf, nb_sectors); |
965 | 83f64091 | bellard | acb->cb(acb->cb_opaque, ret); |
966 | ea2384d3 | bellard | return 0; |
967 | ea2384d3 | bellard | } |
968 | ea2384d3 | bellard | |
969 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb) |
970 | ea2384d3 | bellard | { |
971 | ea2384d3 | bellard | } |
972 | ea2384d3 | bellard | |
973 | 83f64091 | bellard | static void bdrv_aio_delete_em(BlockDriverAIOCB *acb) |
974 | beac80cd | bellard | { |
975 | 83f64091 | bellard | } |
976 | 83f64091 | bellard | #else
|
977 | 83f64091 | bellard | typedef struct BlockDriverAIOCBSync { |
978 | 83f64091 | bellard | QEMUBH *bh; |
979 | 83f64091 | bellard | int ret;
|
980 | 83f64091 | bellard | } BlockDriverAIOCBSync; |
981 | beac80cd | bellard | |
982 | 83f64091 | bellard | static void bdrv_aio_bh_cb(void *opaque) |
983 | 83f64091 | bellard | { |
984 | 83f64091 | bellard | BlockDriverAIOCB *acb = opaque; |
985 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1 = acb->opaque; |
986 | 83f64091 | bellard | acb->cb(acb->cb_opaque, acb1->ret); |
987 | 83f64091 | bellard | } |
988 | beac80cd | bellard | |
989 | 83f64091 | bellard | static int bdrv_aio_new_em(BlockDriverAIOCB *acb) |
990 | 83f64091 | bellard | { |
991 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1; |
992 | beac80cd | bellard | |
993 | 83f64091 | bellard | acb1 = qemu_mallocz(sizeof(BlockDriverAIOCBSync));
|
994 | 83f64091 | bellard | if (!acb1)
|
995 | 83f64091 | bellard | return -1; |
996 | 83f64091 | bellard | acb->opaque = acb1; |
997 | 83f64091 | bellard | acb1->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
998 | 83f64091 | bellard | return 0; |
999 | 83f64091 | bellard | } |
1000 | beac80cd | bellard | |
1001 | 83f64091 | bellard | static int bdrv_aio_read_em(BlockDriverAIOCB *acb, int64_t sector_num, |
1002 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1003 | 83f64091 | bellard | { |
1004 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1 = acb->opaque; |
1005 | 83f64091 | bellard | int ret;
|
1006 | 83f64091 | bellard | |
1007 | 83f64091 | bellard | ret = bdrv_read(acb->bs, sector_num, buf, nb_sectors); |
1008 | 83f64091 | bellard | acb1->ret = ret; |
1009 | 83f64091 | bellard | qemu_bh_schedule(acb1->bh); |
1010 | 83f64091 | bellard | return 0; |
1011 | beac80cd | bellard | } |
1012 | beac80cd | bellard | |
1013 | 83f64091 | bellard | static int bdrv_aio_write_em(BlockDriverAIOCB *acb, int64_t sector_num, |
1014 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1015 | beac80cd | bellard | { |
1016 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1 = acb->opaque; |
1017 | 83f64091 | bellard | int ret;
|
1018 | 83f64091 | bellard | |
1019 | 83f64091 | bellard | ret = bdrv_write(acb->bs, sector_num, buf, nb_sectors); |
1020 | 83f64091 | bellard | acb1->ret = ret; |
1021 | 83f64091 | bellard | qemu_bh_schedule(acb1->bh); |
1022 | 83f64091 | bellard | return 0; |
1023 | beac80cd | bellard | } |
1024 | 83f64091 | bellard | |
1025 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb) |
1026 | beac80cd | bellard | { |
1027 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1 = acb->opaque; |
1028 | 83f64091 | bellard | qemu_bh_cancel(acb1->bh); |
1029 | beac80cd | bellard | } |
1030 | beac80cd | bellard | |
1031 | 83f64091 | bellard | static void bdrv_aio_delete_em(BlockDriverAIOCB *acb) |
1032 | ea2384d3 | bellard | { |
1033 | 83f64091 | bellard | BlockDriverAIOCBSync *acb1 = acb->opaque; |
1034 | 83f64091 | bellard | qemu_bh_delete(acb1->bh); |
1035 | 83f64091 | bellard | } |
1036 | 83f64091 | bellard | #endif /* !QEMU_TOOL */ |
1037 | ea2384d3 | bellard | |
1038 | 83f64091 | bellard | /**************************************************************/
|
1039 | 83f64091 | bellard | /* sync block device emulation */
|
1040 | ea2384d3 | bellard | |
1041 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
1042 | 83f64091 | bellard | { |
1043 | 83f64091 | bellard | *(int *)opaque = ret;
|
1044 | ea2384d3 | bellard | } |
1045 | ea2384d3 | bellard | |
1046 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
1047 | 83f64091 | bellard | |
1048 | 83f64091 | bellard | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
1049 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1050 | 7a6cba61 | pbrook | { |
1051 | 83f64091 | bellard | int async_ret, ret;
|
1052 | 83f64091 | bellard | |
1053 | 83f64091 | bellard | if (!bs->sync_aiocb) {
|
1054 | 83f64091 | bellard | bs->sync_aiocb = bdrv_aio_new(bs); |
1055 | 83f64091 | bellard | if (!bs->sync_aiocb)
|
1056 | 83f64091 | bellard | return -1; |
1057 | 83f64091 | bellard | } |
1058 | 83f64091 | bellard | async_ret = NOT_DONE; |
1059 | 83f64091 | bellard | qemu_aio_wait_start(); |
1060 | 83f64091 | bellard | ret = bdrv_aio_read(bs->sync_aiocb, sector_num, buf, nb_sectors, |
1061 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1062 | 83f64091 | bellard | if (ret < 0) { |
1063 | 83f64091 | bellard | qemu_aio_wait_end(); |
1064 | 83f64091 | bellard | return ret;
|
1065 | 83f64091 | bellard | } |
1066 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1067 | 83f64091 | bellard | qemu_aio_wait(); |
1068 | 83f64091 | bellard | } |
1069 | 83f64091 | bellard | qemu_aio_wait_end(); |
1070 | 83f64091 | bellard | return async_ret;
|
1071 | 7a6cba61 | pbrook | } |
1072 | 7a6cba61 | pbrook | |
1073 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1074 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1075 | 83f64091 | bellard | { |
1076 | 83f64091 | bellard | int async_ret, ret;
|
1077 | 83f64091 | bellard | |
1078 | 83f64091 | bellard | if (!bs->sync_aiocb) {
|
1079 | 83f64091 | bellard | bs->sync_aiocb = bdrv_aio_new(bs); |
1080 | 83f64091 | bellard | if (!bs->sync_aiocb)
|
1081 | 83f64091 | bellard | return -1; |
1082 | 83f64091 | bellard | } |
1083 | 83f64091 | bellard | async_ret = NOT_DONE; |
1084 | 83f64091 | bellard | qemu_aio_wait_start(); |
1085 | 83f64091 | bellard | ret = bdrv_aio_write(bs->sync_aiocb, sector_num, buf, nb_sectors, |
1086 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1087 | 83f64091 | bellard | if (ret < 0) { |
1088 | 83f64091 | bellard | qemu_aio_wait_end(); |
1089 | 83f64091 | bellard | return ret;
|
1090 | 83f64091 | bellard | } |
1091 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1092 | 83f64091 | bellard | qemu_aio_wait(); |
1093 | 83f64091 | bellard | } |
1094 | 83f64091 | bellard | qemu_aio_wait_end(); |
1095 | 83f64091 | bellard | return async_ret;
|
1096 | 83f64091 | bellard | } |
1097 | ea2384d3 | bellard | |
1098 | ea2384d3 | bellard | void bdrv_init(void) |
1099 | ea2384d3 | bellard | { |
1100 | ea2384d3 | bellard | bdrv_register(&bdrv_raw); |
1101 | ea2384d3 | bellard | #ifndef _WIN32
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1102 | ea2384d3 | bellard | bdrv_register(&bdrv_cow); |
1103 | ea2384d3 | bellard | #endif
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1104 | ea2384d3 | bellard | bdrv_register(&bdrv_qcow); |
1105 | ea2384d3 | bellard | bdrv_register(&bdrv_vmdk); |
1106 | 3c56521b | bellard | bdrv_register(&bdrv_cloop); |
1107 | 585d0ed9 | bellard | bdrv_register(&bdrv_dmg); |
1108 | a8753c34 | bellard | bdrv_register(&bdrv_bochs); |
1109 | 6a0f9e82 | bellard | bdrv_register(&bdrv_vpc); |
1110 | 712e7874 | bellard | bdrv_register(&bdrv_vvfat); |
1111 | ea2384d3 | bellard | } |