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1 | fc01f7e7 | bellard | /*
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2 | fc01f7e7 | bellard | * QEMU System Emulator block driver
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3 | 5fafdf24 | ths | *
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4 | fc01f7e7 | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | 5fafdf24 | ths | *
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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 | 3990d09a | blueswir1 | #include "config-host.h" |
25 | 71e72a19 | Juan Quintela | #ifdef CONFIG_BSD
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26 | 3990d09a | blueswir1 | /* include native header before sys-queue.h */
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27 | 3990d09a | blueswir1 | #include <sys/queue.h> |
28 | 3990d09a | blueswir1 | #endif
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29 | 3990d09a | blueswir1 | |
30 | faf07963 | pbrook | #include "qemu-common.h" |
31 | 376253ec | aliguori | #include "monitor.h" |
32 | ea2384d3 | bellard | #include "block_int.h" |
33 | 5efa9d5a | Anthony Liguori | #include "module.h" |
34 | fc01f7e7 | bellard | |
35 | 71e72a19 | Juan Quintela | #ifdef CONFIG_BSD
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36 | 7674e7bf | bellard | #include <sys/types.h> |
37 | 7674e7bf | bellard | #include <sys/stat.h> |
38 | 7674e7bf | bellard | #include <sys/ioctl.h> |
39 | c5e97233 | blueswir1 | #ifndef __DragonFly__
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40 | 7674e7bf | bellard | #include <sys/disk.h> |
41 | 7674e7bf | bellard | #endif
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42 | c5e97233 | blueswir1 | #endif
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43 | 7674e7bf | bellard | |
44 | 49dc768d | aliguori | #ifdef _WIN32
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45 | 49dc768d | aliguori | #include <windows.h> |
46 | 49dc768d | aliguori | #endif
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47 | 49dc768d | aliguori | |
48 | 83f64091 | bellard | #define SECTOR_BITS 9 |
49 | 83f64091 | bellard | #define SECTOR_SIZE (1 << SECTOR_BITS) |
50 | 83f64091 | bellard | |
51 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
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52 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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53 | c87c0672 | aliguori | BlockDriverCompletionFunc *cb, void *opaque);
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54 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
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55 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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56 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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57 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
58 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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59 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
60 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
61 | ec530c81 | bellard | |
62 | 7ee930d0 | blueswir1 | BlockDriverState *bdrv_first; |
63 | 7ee930d0 | blueswir1 | |
64 | ea2384d3 | bellard | static BlockDriver *first_drv;
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65 | ea2384d3 | bellard | |
66 | 83f64091 | bellard | int path_is_absolute(const char *path) |
67 | 3b0d4f61 | bellard | { |
68 | 83f64091 | bellard | const char *p; |
69 | 21664424 | bellard | #ifdef _WIN32
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70 | 21664424 | bellard | /* specific case for names like: "\\.\d:" */
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71 | 21664424 | bellard | if (*path == '/' || *path == '\\') |
72 | 21664424 | bellard | return 1; |
73 | 21664424 | bellard | #endif
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74 | 83f64091 | bellard | p = strchr(path, ':');
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75 | 83f64091 | bellard | if (p)
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76 | 83f64091 | bellard | p++; |
77 | 83f64091 | bellard | else
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78 | 83f64091 | bellard | p = path; |
79 | 3b9f94e1 | bellard | #ifdef _WIN32
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80 | 3b9f94e1 | bellard | return (*p == '/' || *p == '\\'); |
81 | 3b9f94e1 | bellard | #else
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82 | 3b9f94e1 | bellard | return (*p == '/'); |
83 | 3b9f94e1 | bellard | #endif
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84 | 3b0d4f61 | bellard | } |
85 | 3b0d4f61 | bellard | |
86 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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87 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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88 | 83f64091 | bellard | supported. */
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89 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
90 | 83f64091 | bellard | const char *base_path, |
91 | 83f64091 | bellard | const char *filename) |
92 | 3b0d4f61 | bellard | { |
93 | 83f64091 | bellard | const char *p, *p1; |
94 | 83f64091 | bellard | int len;
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95 | 83f64091 | bellard | |
96 | 83f64091 | bellard | if (dest_size <= 0) |
97 | 83f64091 | bellard | return;
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98 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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99 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
100 | 83f64091 | bellard | } else {
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101 | 83f64091 | bellard | p = strchr(base_path, ':');
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102 | 83f64091 | bellard | if (p)
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103 | 83f64091 | bellard | p++; |
104 | 83f64091 | bellard | else
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105 | 83f64091 | bellard | p = base_path; |
106 | 3b9f94e1 | bellard | p1 = strrchr(base_path, '/');
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107 | 3b9f94e1 | bellard | #ifdef _WIN32
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108 | 3b9f94e1 | bellard | { |
109 | 3b9f94e1 | bellard | const char *p2; |
110 | 3b9f94e1 | bellard | p2 = strrchr(base_path, '\\');
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111 | 3b9f94e1 | bellard | if (!p1 || p2 > p1)
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112 | 3b9f94e1 | bellard | p1 = p2; |
113 | 3b9f94e1 | bellard | } |
114 | 3b9f94e1 | bellard | #endif
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115 | 83f64091 | bellard | if (p1)
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116 | 83f64091 | bellard | p1++; |
117 | 83f64091 | bellard | else
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118 | 83f64091 | bellard | p1 = base_path; |
119 | 83f64091 | bellard | if (p1 > p)
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120 | 83f64091 | bellard | p = p1; |
121 | 83f64091 | bellard | len = p - base_path; |
122 | 83f64091 | bellard | if (len > dest_size - 1) |
123 | 83f64091 | bellard | len = dest_size - 1;
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124 | 83f64091 | bellard | memcpy(dest, base_path, len); |
125 | 83f64091 | bellard | dest[len] = '\0';
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126 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
127 | 3b0d4f61 | bellard | } |
128 | 3b0d4f61 | bellard | } |
129 | 3b0d4f61 | bellard | |
130 | 5efa9d5a | Anthony Liguori | void bdrv_register(BlockDriver *bdrv)
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131 | ea2384d3 | bellard | { |
132 | f141eafe | aliguori | if (!bdrv->bdrv_aio_readv) {
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133 | 83f64091 | bellard | /* add AIO emulation layer */
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134 | f141eafe | aliguori | bdrv->bdrv_aio_readv = bdrv_aio_readv_em; |
135 | f141eafe | aliguori | bdrv->bdrv_aio_writev = bdrv_aio_writev_em; |
136 | eda578e5 | aliguori | } else if (!bdrv->bdrv_read) { |
137 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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138 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
139 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
140 | 83f64091 | bellard | } |
141 | ea2384d3 | bellard | bdrv->next = first_drv; |
142 | ea2384d3 | bellard | first_drv = bdrv; |
143 | ea2384d3 | bellard | } |
144 | b338082b | bellard | |
145 | b338082b | bellard | /* create a new block device (by default it is empty) */
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146 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
147 | b338082b | bellard | { |
148 | b338082b | bellard | BlockDriverState **pbs, *bs; |
149 | b338082b | bellard | |
150 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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151 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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152 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
153 | ea2384d3 | bellard | /* insert at the end */
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154 | ea2384d3 | bellard | pbs = &bdrv_first; |
155 | ea2384d3 | bellard | while (*pbs != NULL) |
156 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
157 | ea2384d3 | bellard | *pbs = bs; |
158 | ea2384d3 | bellard | } |
159 | b338082b | bellard | return bs;
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160 | b338082b | bellard | } |
161 | b338082b | bellard | |
162 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
163 | ea2384d3 | bellard | { |
164 | ea2384d3 | bellard | BlockDriver *drv1; |
165 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
166 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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167 | ea2384d3 | bellard | return drv1;
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168 | ea2384d3 | bellard | } |
169 | ea2384d3 | bellard | return NULL; |
170 | ea2384d3 | bellard | } |
171 | ea2384d3 | bellard | |
172 | 0e7e1989 | Kevin Wolf | int bdrv_create(BlockDriver *drv, const char* filename, |
173 | 0e7e1989 | Kevin Wolf | QEMUOptionParameter *options) |
174 | ea2384d3 | bellard | { |
175 | ea2384d3 | bellard | if (!drv->bdrv_create)
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176 | ea2384d3 | bellard | return -ENOTSUP;
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177 | 0e7e1989 | Kevin Wolf | |
178 | 0e7e1989 | Kevin Wolf | return drv->bdrv_create(filename, options);
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179 | ea2384d3 | bellard | } |
180 | ea2384d3 | bellard | |
181 | d5249393 | bellard | #ifdef _WIN32
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182 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
183 | d5249393 | bellard | { |
184 | 3b9f94e1 | bellard | char temp_dir[MAX_PATH];
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185 | 3b46e624 | ths | |
186 | 3b9f94e1 | bellard | GetTempPath(MAX_PATH, temp_dir); |
187 | 3b9f94e1 | bellard | GetTempFileName(temp_dir, "qem", 0, filename); |
188 | d5249393 | bellard | } |
189 | d5249393 | bellard | #else
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190 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
191 | fc01f7e7 | bellard | { |
192 | 67b915a5 | bellard | int fd;
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193 | 7ccfb2eb | blueswir1 | const char *tmpdir; |
194 | d5249393 | bellard | /* XXX: race condition possible */
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195 | 0badc1ee | aurel32 | tmpdir = getenv("TMPDIR");
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196 | 0badc1ee | aurel32 | if (!tmpdir)
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197 | 0badc1ee | aurel32 | tmpdir = "/tmp";
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198 | 0badc1ee | aurel32 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir);
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199 | ea2384d3 | bellard | fd = mkstemp(filename); |
200 | ea2384d3 | bellard | close(fd); |
201 | ea2384d3 | bellard | } |
202 | d5249393 | bellard | #endif
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203 | fc01f7e7 | bellard | |
204 | 19cb3738 | bellard | #ifdef _WIN32
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205 | f45512fe | bellard | static int is_windows_drive_prefix(const char *filename) |
206 | f45512fe | bellard | { |
207 | f45512fe | bellard | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
208 | f45512fe | bellard | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
209 | f45512fe | bellard | filename[1] == ':'); |
210 | f45512fe | bellard | } |
211 | 3b46e624 | ths | |
212 | 508c7cb3 | Christoph Hellwig | int is_windows_drive(const char *filename) |
213 | 19cb3738 | bellard | { |
214 | 5fafdf24 | ths | if (is_windows_drive_prefix(filename) &&
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215 | f45512fe | bellard | filename[2] == '\0') |
216 | 19cb3738 | bellard | return 1; |
217 | 19cb3738 | bellard | if (strstart(filename, "\\\\.\\", NULL) || |
218 | 19cb3738 | bellard | strstart(filename, "//./", NULL)) |
219 | 19cb3738 | bellard | return 1; |
220 | 19cb3738 | bellard | return 0; |
221 | 19cb3738 | bellard | } |
222 | 19cb3738 | bellard | #endif
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223 | 19cb3738 | bellard | |
224 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
225 | 83f64091 | bellard | { |
226 | 83f64091 | bellard | BlockDriver *drv1; |
227 | 83f64091 | bellard | char protocol[128]; |
228 | 1cec71e3 | Anthony Liguori | int len;
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229 | 83f64091 | bellard | const char *p; |
230 | 19cb3738 | bellard | |
231 | 19cb3738 | bellard | #ifdef _WIN32
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232 | f45512fe | bellard | if (is_windows_drive(filename) ||
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233 | f45512fe | bellard | is_windows_drive_prefix(filename)) |
234 | 5efa9d5a | Anthony Liguori | return bdrv_find_format("raw"); |
235 | 19cb3738 | bellard | #endif
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236 | 1cec71e3 | Anthony Liguori | p = strchr(filename, ':');
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237 | 1cec71e3 | Anthony Liguori | if (!p)
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238 | 5efa9d5a | Anthony Liguori | return bdrv_find_format("raw"); |
239 | 1cec71e3 | Anthony Liguori | len = p - filename; |
240 | 1cec71e3 | Anthony Liguori | if (len > sizeof(protocol) - 1) |
241 | 1cec71e3 | Anthony Liguori | len = sizeof(protocol) - 1; |
242 | 1cec71e3 | Anthony Liguori | memcpy(protocol, filename, len); |
243 | 1cec71e3 | Anthony Liguori | protocol[len] = '\0';
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244 | 83f64091 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
245 | 5fafdf24 | ths | if (drv1->protocol_name &&
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246 | 83f64091 | bellard | !strcmp(drv1->protocol_name, protocol)) |
247 | 83f64091 | bellard | return drv1;
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248 | 83f64091 | bellard | } |
249 | 83f64091 | bellard | return NULL; |
250 | 83f64091 | bellard | } |
251 | 83f64091 | bellard | |
252 | f3a5d3f8 | Christoph Hellwig | /*
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253 | f3a5d3f8 | Christoph Hellwig | * Detect host devices. By convention, /dev/cdrom[N] is always
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254 | f3a5d3f8 | Christoph Hellwig | * recognized as a host CDROM.
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255 | f3a5d3f8 | Christoph Hellwig | */
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256 | f3a5d3f8 | Christoph Hellwig | static BlockDriver *find_hdev_driver(const char *filename) |
257 | f3a5d3f8 | Christoph Hellwig | { |
258 | 508c7cb3 | Christoph Hellwig | int score_max = 0, score; |
259 | 508c7cb3 | Christoph Hellwig | BlockDriver *drv = NULL, *d;
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260 | f3a5d3f8 | Christoph Hellwig | |
261 | 508c7cb3 | Christoph Hellwig | for (d = first_drv; d; d = d->next) {
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262 | 508c7cb3 | Christoph Hellwig | if (d->bdrv_probe_device) {
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263 | 508c7cb3 | Christoph Hellwig | score = d->bdrv_probe_device(filename); |
264 | 508c7cb3 | Christoph Hellwig | if (score > score_max) {
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265 | 508c7cb3 | Christoph Hellwig | score_max = score; |
266 | 508c7cb3 | Christoph Hellwig | drv = d; |
267 | 508c7cb3 | Christoph Hellwig | } |
268 | 508c7cb3 | Christoph Hellwig | } |
269 | 19cb3738 | bellard | } |
270 | f3a5d3f8 | Christoph Hellwig | |
271 | 508c7cb3 | Christoph Hellwig | return drv;
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272 | f3a5d3f8 | Christoph Hellwig | } |
273 | 3b46e624 | ths | |
274 | f3a5d3f8 | Christoph Hellwig | static BlockDriver *find_image_format(const char *filename) |
275 | f3a5d3f8 | Christoph Hellwig | { |
276 | f3a5d3f8 | Christoph Hellwig | int ret, score, score_max;
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277 | f3a5d3f8 | Christoph Hellwig | BlockDriver *drv1, *drv; |
278 | f3a5d3f8 | Christoph Hellwig | uint8_t buf[2048];
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279 | f3a5d3f8 | Christoph Hellwig | BlockDriverState *bs; |
280 | f3a5d3f8 | Christoph Hellwig | |
281 | 83f64091 | bellard | drv = find_protocol(filename); |
282 | 19cb3738 | bellard | /* no need to test disk image formats for vvfat */
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283 | c833ab73 | Anthony Liguori | if (drv && strcmp(drv->format_name, "vvfat") == 0) |
284 | 83f64091 | bellard | return drv;
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285 | 19cb3738 | bellard | |
286 | 83f64091 | bellard | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
287 | 83f64091 | bellard | if (ret < 0) |
288 | 83f64091 | bellard | return NULL; |
289 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
290 | 83f64091 | bellard | bdrv_delete(bs); |
291 | 83f64091 | bellard | if (ret < 0) { |
292 | 83f64091 | bellard | return NULL; |
293 | 83f64091 | bellard | } |
294 | 83f64091 | bellard | |
295 | ea2384d3 | bellard | score_max = 0;
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296 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
297 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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298 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
299 | 83f64091 | bellard | if (score > score_max) {
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300 | 83f64091 | bellard | score_max = score; |
301 | 83f64091 | bellard | drv = drv1; |
302 | 83f64091 | bellard | } |
303 | 0849bf08 | bellard | } |
304 | fc01f7e7 | bellard | } |
305 | ea2384d3 | bellard | return drv;
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306 | ea2384d3 | bellard | } |
307 | ea2384d3 | bellard | |
308 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
309 | ea2384d3 | bellard | { |
310 | 83f64091 | bellard | BlockDriverState *bs; |
311 | 83f64091 | bellard | int ret;
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312 | 83f64091 | bellard | |
313 | 83f64091 | bellard | bs = bdrv_new("");
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314 | 83f64091 | bellard | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
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315 | 83f64091 | bellard | if (ret < 0) { |
316 | 83f64091 | bellard | bdrv_delete(bs); |
317 | 83f64091 | bellard | return ret;
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318 | 3b0d4f61 | bellard | } |
319 | 71d0770c | aliguori | bs->growable = 1;
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320 | 83f64091 | bellard | *pbs = bs; |
321 | 83f64091 | bellard | return 0; |
322 | 83f64091 | bellard | } |
323 | 83f64091 | bellard | |
324 | 83f64091 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
325 | 83f64091 | bellard | { |
326 | 83f64091 | bellard | return bdrv_open2(bs, filename, flags, NULL); |
327 | ea2384d3 | bellard | } |
328 | ea2384d3 | bellard | |
329 | 83f64091 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
330 | ea2384d3 | bellard | BlockDriver *drv) |
331 | ea2384d3 | bellard | { |
332 | 83f64091 | bellard | int ret, open_flags;
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333 | eb5c851f | ths | char tmp_filename[PATH_MAX];
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334 | eb5c851f | ths | char backing_filename[PATH_MAX];
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335 | 3b46e624 | ths | |
336 | ea2384d3 | bellard | bs->read_only = 0;
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337 | ea2384d3 | bellard | bs->is_temporary = 0;
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338 | ea2384d3 | bellard | bs->encrypted = 0;
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339 | c0f4ce77 | aliguori | bs->valid_key = 0;
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340 | e268ca52 | aliguori | /* buffer_alignment defaulted to 512, drivers can change this value */
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341 | e268ca52 | aliguori | bs->buffer_alignment = 512;
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342 | 712e7874 | bellard | |
343 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
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344 | ea2384d3 | bellard | BlockDriverState *bs1; |
345 | ea2384d3 | bellard | int64_t total_size; |
346 | 7c96d46e | aliguori | int is_protocol = 0; |
347 | 91a073a9 | Kevin Wolf | BlockDriver *bdrv_qcow2; |
348 | 91a073a9 | Kevin Wolf | QEMUOptionParameter *options; |
349 | 3b46e624 | ths | |
350 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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351 | ea2384d3 | bellard | instead of opening 'filename' directly */
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352 | 33e3963e | bellard | |
353 | ea2384d3 | bellard | /* if there is a backing file, use it */
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354 | ea2384d3 | bellard | bs1 = bdrv_new("");
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355 | 5eb45639 | aliguori | ret = bdrv_open2(bs1, filename, 0, drv);
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356 | 51d7c00c | aliguori | if (ret < 0) { |
357 | ea2384d3 | bellard | bdrv_delete(bs1); |
358 | 51d7c00c | aliguori | return ret;
|
359 | ea2384d3 | bellard | } |
360 | 83f64091 | bellard | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
361 | 7c96d46e | aliguori | |
362 | 7c96d46e | aliguori | if (bs1->drv && bs1->drv->protocol_name)
|
363 | 7c96d46e | aliguori | is_protocol = 1;
|
364 | 7c96d46e | aliguori | |
365 | ea2384d3 | bellard | bdrv_delete(bs1); |
366 | 3b46e624 | ths | |
367 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
|
368 | 7c96d46e | aliguori | |
369 | 7c96d46e | aliguori | /* Real path is meaningless for protocols */
|
370 | 7c96d46e | aliguori | if (is_protocol)
|
371 | 7c96d46e | aliguori | snprintf(backing_filename, sizeof(backing_filename),
|
372 | 7c96d46e | aliguori | "%s", filename);
|
373 | 7c96d46e | aliguori | else
|
374 | 7c96d46e | aliguori | realpath(filename, backing_filename); |
375 | 7c96d46e | aliguori | |
376 | 91a073a9 | Kevin Wolf | bdrv_qcow2 = bdrv_find_format("qcow2");
|
377 | 91a073a9 | Kevin Wolf | options = parse_option_parameters("", bdrv_qcow2->create_options, NULL); |
378 | 91a073a9 | Kevin Wolf | |
379 | 91a073a9 | Kevin Wolf | set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size * 512);
|
380 | 91a073a9 | Kevin Wolf | set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename); |
381 | 91a073a9 | Kevin Wolf | if (drv) {
|
382 | 91a073a9 | Kevin Wolf | set_option_parameter(options, BLOCK_OPT_BACKING_FMT, |
383 | 91a073a9 | Kevin Wolf | drv->format_name); |
384 | 91a073a9 | Kevin Wolf | } |
385 | 91a073a9 | Kevin Wolf | |
386 | 91a073a9 | Kevin Wolf | ret = bdrv_create(bdrv_qcow2, tmp_filename, options); |
387 | 51d7c00c | aliguori | if (ret < 0) { |
388 | 51d7c00c | aliguori | return ret;
|
389 | ea2384d3 | bellard | } |
390 | 91a073a9 | Kevin Wolf | |
391 | ea2384d3 | bellard | filename = tmp_filename; |
392 | 91a073a9 | Kevin Wolf | drv = bdrv_qcow2; |
393 | ea2384d3 | bellard | bs->is_temporary = 1;
|
394 | ea2384d3 | bellard | } |
395 | 712e7874 | bellard | |
396 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
397 | 83f64091 | bellard | if (flags & BDRV_O_FILE) {
|
398 | 83f64091 | bellard | drv = find_protocol(filename); |
399 | 51d7c00c | aliguori | } else if (!drv) { |
400 | f3a5d3f8 | Christoph Hellwig | drv = find_hdev_driver(filename); |
401 | f3a5d3f8 | Christoph Hellwig | if (!drv) {
|
402 | f3a5d3f8 | Christoph Hellwig | drv = find_image_format(filename); |
403 | f3a5d3f8 | Christoph Hellwig | } |
404 | 51d7c00c | aliguori | } |
405 | 51d7c00c | aliguori | if (!drv) {
|
406 | 51d7c00c | aliguori | ret = -ENOENT; |
407 | 51d7c00c | aliguori | goto unlink_and_fail;
|
408 | ea2384d3 | bellard | } |
409 | ea2384d3 | bellard | bs->drv = drv; |
410 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
411 | 83f64091 | bellard | /* Note: for compatibility, we open disk image files as RDWR, and
|
412 | 83f64091 | bellard | RDONLY as fallback */
|
413 | 83f64091 | bellard | if (!(flags & BDRV_O_FILE))
|
414 | 9f7965c7 | aliguori | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
415 | 83f64091 | bellard | else
|
416 | 83f64091 | bellard | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
417 | 1cec71e3 | Anthony Liguori | ret = drv->bdrv_open(bs, filename, open_flags); |
418 | a0a83536 | aurel32 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) {
|
419 | 1cec71e3 | Anthony Liguori | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
420 | 83f64091 | bellard | bs->read_only = 1;
|
421 | 83f64091 | bellard | } |
422 | ea2384d3 | bellard | if (ret < 0) { |
423 | ea2384d3 | bellard | qemu_free(bs->opaque); |
424 | 6b21b973 | bellard | bs->opaque = NULL;
|
425 | 6b21b973 | bellard | bs->drv = NULL;
|
426 | 51d7c00c | aliguori | unlink_and_fail:
|
427 | 51d7c00c | aliguori | if (bs->is_temporary)
|
428 | 51d7c00c | aliguori | unlink(filename); |
429 | 83f64091 | bellard | return ret;
|
430 | 33e3963e | bellard | } |
431 | d15a771d | bellard | if (drv->bdrv_getlength) {
|
432 | d15a771d | bellard | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
433 | d15a771d | bellard | } |
434 | 67b915a5 | bellard | #ifndef _WIN32
|
435 | ea2384d3 | bellard | if (bs->is_temporary) {
|
436 | ea2384d3 | bellard | unlink(filename); |
437 | ea2384d3 | bellard | } |
438 | ea2384d3 | bellard | #endif
|
439 | 83f64091 | bellard | if (bs->backing_file[0] != '\0') { |
440 | ea2384d3 | bellard | /* if there is a backing file, use it */
|
441 | 5eb45639 | aliguori | BlockDriver *back_drv = NULL;
|
442 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
|
443 | 83f64091 | bellard | path_combine(backing_filename, sizeof(backing_filename),
|
444 | 83f64091 | bellard | filename, bs->backing_file); |
445 | 5eb45639 | aliguori | if (bs->backing_format[0] != '\0') |
446 | 5eb45639 | aliguori | back_drv = bdrv_find_format(bs->backing_format); |
447 | 5eb45639 | aliguori | ret = bdrv_open2(bs->backing_hd, backing_filename, open_flags, |
448 | 5eb45639 | aliguori | back_drv); |
449 | 51d7c00c | aliguori | if (ret < 0) { |
450 | 51d7c00c | aliguori | bdrv_close(bs); |
451 | 51d7c00c | aliguori | return ret;
|
452 | 51d7c00c | aliguori | } |
453 | 33e3963e | bellard | } |
454 | 33e3963e | bellard | |
455 | bb5fc20f | aliguori | if (!bdrv_key_required(bs)) {
|
456 | bb5fc20f | aliguori | /* call the change callback */
|
457 | bb5fc20f | aliguori | bs->media_changed = 1;
|
458 | bb5fc20f | aliguori | if (bs->change_cb)
|
459 | bb5fc20f | aliguori | bs->change_cb(bs->change_opaque); |
460 | bb5fc20f | aliguori | } |
461 | b338082b | bellard | return 0; |
462 | fc01f7e7 | bellard | } |
463 | fc01f7e7 | bellard | |
464 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
465 | fc01f7e7 | bellard | { |
466 | 19cb3738 | bellard | if (bs->drv) {
|
467 | ea2384d3 | bellard | if (bs->backing_hd)
|
468 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
469 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
470 | ea2384d3 | bellard | qemu_free(bs->opaque); |
471 | ea2384d3 | bellard | #ifdef _WIN32
|
472 | ea2384d3 | bellard | if (bs->is_temporary) {
|
473 | ea2384d3 | bellard | unlink(bs->filename); |
474 | ea2384d3 | bellard | } |
475 | 67b915a5 | bellard | #endif
|
476 | ea2384d3 | bellard | bs->opaque = NULL;
|
477 | ea2384d3 | bellard | bs->drv = NULL;
|
478 | b338082b | bellard | |
479 | b338082b | bellard | /* call the change callback */
|
480 | 19cb3738 | bellard | bs->media_changed = 1;
|
481 | b338082b | bellard | if (bs->change_cb)
|
482 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
483 | b338082b | bellard | } |
484 | b338082b | bellard | } |
485 | b338082b | bellard | |
486 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
487 | b338082b | bellard | { |
488 | 34c6f050 | aurel32 | BlockDriverState **pbs; |
489 | 34c6f050 | aurel32 | |
490 | 34c6f050 | aurel32 | pbs = &bdrv_first; |
491 | 34c6f050 | aurel32 | while (*pbs != bs && *pbs != NULL) |
492 | 34c6f050 | aurel32 | pbs = &(*pbs)->next; |
493 | 34c6f050 | aurel32 | if (*pbs == bs)
|
494 | 34c6f050 | aurel32 | *pbs = bs->next; |
495 | 34c6f050 | aurel32 | |
496 | b338082b | bellard | bdrv_close(bs); |
497 | b338082b | bellard | qemu_free(bs); |
498 | fc01f7e7 | bellard | } |
499 | fc01f7e7 | bellard | |
500 | e97fc193 | aliguori | /*
|
501 | e97fc193 | aliguori | * Run consistency checks on an image
|
502 | e97fc193 | aliguori | *
|
503 | e97fc193 | aliguori | * Returns the number of errors or -errno when an internal error occurs
|
504 | e97fc193 | aliguori | */
|
505 | e97fc193 | aliguori | int bdrv_check(BlockDriverState *bs)
|
506 | e97fc193 | aliguori | { |
507 | e97fc193 | aliguori | if (bs->drv->bdrv_check == NULL) { |
508 | e97fc193 | aliguori | return -ENOTSUP;
|
509 | e97fc193 | aliguori | } |
510 | e97fc193 | aliguori | |
511 | e97fc193 | aliguori | return bs->drv->bdrv_check(bs);
|
512 | e97fc193 | aliguori | } |
513 | e97fc193 | aliguori | |
514 | 33e3963e | bellard | /* commit COW file into the raw image */
|
515 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
516 | 33e3963e | bellard | { |
517 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
518 | 83f64091 | bellard | int64_t i, total_sectors; |
519 | ea2384d3 | bellard | int n, j;
|
520 | ea2384d3 | bellard | unsigned char sector[512]; |
521 | 33e3963e | bellard | |
522 | 19cb3738 | bellard | if (!drv)
|
523 | 19cb3738 | bellard | return -ENOMEDIUM;
|
524 | 33e3963e | bellard | |
525 | 33e3963e | bellard | if (bs->read_only) {
|
526 | ea2384d3 | bellard | return -EACCES;
|
527 | 33e3963e | bellard | } |
528 | 33e3963e | bellard | |
529 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
530 | ea2384d3 | bellard | return -ENOTSUP;
|
531 | ea2384d3 | bellard | } |
532 | 33e3963e | bellard | |
533 | 83f64091 | bellard | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
534 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
535 | 19cb3738 | bellard | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
536 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
537 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
538 | ea2384d3 | bellard | return -EIO;
|
539 | ea2384d3 | bellard | } |
540 | ea2384d3 | bellard | |
541 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
542 | ea2384d3 | bellard | return -EIO;
|
543 | ea2384d3 | bellard | } |
544 | ea2384d3 | bellard | i++; |
545 | 33e3963e | bellard | } |
546 | ea2384d3 | bellard | } else {
|
547 | ea2384d3 | bellard | i += n; |
548 | ea2384d3 | bellard | } |
549 | 33e3963e | bellard | } |
550 | 95389c86 | bellard | |
551 | 19cb3738 | bellard | if (drv->bdrv_make_empty)
|
552 | 19cb3738 | bellard | return drv->bdrv_make_empty(bs);
|
553 | 95389c86 | bellard | |
554 | 33e3963e | bellard | return 0; |
555 | 33e3963e | bellard | } |
556 | 33e3963e | bellard | |
557 | 71d0770c | aliguori | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
558 | 71d0770c | aliguori | size_t size) |
559 | 71d0770c | aliguori | { |
560 | 71d0770c | aliguori | int64_t len; |
561 | 71d0770c | aliguori | |
562 | 71d0770c | aliguori | if (!bdrv_is_inserted(bs))
|
563 | 71d0770c | aliguori | return -ENOMEDIUM;
|
564 | 71d0770c | aliguori | |
565 | 71d0770c | aliguori | if (bs->growable)
|
566 | 71d0770c | aliguori | return 0; |
567 | 71d0770c | aliguori | |
568 | 71d0770c | aliguori | len = bdrv_getlength(bs); |
569 | 71d0770c | aliguori | |
570 | fbb7b4e0 | Kevin Wolf | if (offset < 0) |
571 | fbb7b4e0 | Kevin Wolf | return -EIO;
|
572 | fbb7b4e0 | Kevin Wolf | |
573 | fbb7b4e0 | Kevin Wolf | if ((offset > len) || (len - offset < size))
|
574 | 71d0770c | aliguori | return -EIO;
|
575 | 71d0770c | aliguori | |
576 | 71d0770c | aliguori | return 0; |
577 | 71d0770c | aliguori | } |
578 | 71d0770c | aliguori | |
579 | 71d0770c | aliguori | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, |
580 | 71d0770c | aliguori | int nb_sectors)
|
581 | 71d0770c | aliguori | { |
582 | 999dec57 | aliguori | return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512); |
583 | 71d0770c | aliguori | } |
584 | 71d0770c | aliguori | |
585 | 19cb3738 | bellard | /* return < 0 if error. See bdrv_write() for the return codes */
|
586 | 5fafdf24 | ths | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
587 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
588 | fc01f7e7 | bellard | { |
589 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
590 | ea2384d3 | bellard | |
591 | 19cb3738 | bellard | if (!drv)
|
592 | 19cb3738 | bellard | return -ENOMEDIUM;
|
593 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
594 | 71d0770c | aliguori | return -EIO;
|
595 | b338082b | bellard | |
596 | eda578e5 | aliguori | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
597 | fc01f7e7 | bellard | } |
598 | fc01f7e7 | bellard | |
599 | 5fafdf24 | ths | /* Return < 0 if error. Important errors are:
|
600 | 19cb3738 | bellard | -EIO generic I/O error (may happen for all errors)
|
601 | 19cb3738 | bellard | -ENOMEDIUM No media inserted.
|
602 | 19cb3738 | bellard | -EINVAL Invalid sector number or nb_sectors
|
603 | 19cb3738 | bellard | -EACCES Trying to write a read-only device
|
604 | 19cb3738 | bellard | */
|
605 | 5fafdf24 | ths | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
606 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
607 | fc01f7e7 | bellard | { |
608 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
609 | 19cb3738 | bellard | if (!bs->drv)
|
610 | 19cb3738 | bellard | return -ENOMEDIUM;
|
611 | 0849bf08 | bellard | if (bs->read_only)
|
612 | 19cb3738 | bellard | return -EACCES;
|
613 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
614 | 71d0770c | aliguori | return -EIO;
|
615 | 71d0770c | aliguori | |
616 | 42fb2807 | aliguori | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
617 | 83f64091 | bellard | } |
618 | 83f64091 | bellard | |
619 | eda578e5 | aliguori | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
620 | eda578e5 | aliguori | void *buf, int count1) |
621 | 83f64091 | bellard | { |
622 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
623 | 83f64091 | bellard | int len, nb_sectors, count;
|
624 | 83f64091 | bellard | int64_t sector_num; |
625 | 83f64091 | bellard | |
626 | 83f64091 | bellard | count = count1; |
627 | 83f64091 | bellard | /* first read to align to sector start */
|
628 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
629 | 83f64091 | bellard | if (len > count)
|
630 | 83f64091 | bellard | len = count; |
631 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
632 | 83f64091 | bellard | if (len > 0) { |
633 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
634 | 83f64091 | bellard | return -EIO;
|
635 | 83f64091 | bellard | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
|
636 | 83f64091 | bellard | count -= len; |
637 | 83f64091 | bellard | if (count == 0) |
638 | 83f64091 | bellard | return count1;
|
639 | 83f64091 | bellard | sector_num++; |
640 | 83f64091 | bellard | buf += len; |
641 | 83f64091 | bellard | } |
642 | 83f64091 | bellard | |
643 | 83f64091 | bellard | /* read the sectors "in place" */
|
644 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
645 | 83f64091 | bellard | if (nb_sectors > 0) { |
646 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
647 | 83f64091 | bellard | return -EIO;
|
648 | 83f64091 | bellard | sector_num += nb_sectors; |
649 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
650 | 83f64091 | bellard | buf += len; |
651 | 83f64091 | bellard | count -= len; |
652 | 83f64091 | bellard | } |
653 | 83f64091 | bellard | |
654 | 83f64091 | bellard | /* add data from the last sector */
|
655 | 83f64091 | bellard | if (count > 0) { |
656 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
657 | 83f64091 | bellard | return -EIO;
|
658 | 83f64091 | bellard | memcpy(buf, tmp_buf, count); |
659 | 83f64091 | bellard | } |
660 | 83f64091 | bellard | return count1;
|
661 | 83f64091 | bellard | } |
662 | 83f64091 | bellard | |
663 | eda578e5 | aliguori | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
664 | eda578e5 | aliguori | const void *buf, int count1) |
665 | 83f64091 | bellard | { |
666 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
667 | 83f64091 | bellard | int len, nb_sectors, count;
|
668 | 83f64091 | bellard | int64_t sector_num; |
669 | 83f64091 | bellard | |
670 | 83f64091 | bellard | count = count1; |
671 | 83f64091 | bellard | /* first write to align to sector start */
|
672 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
673 | 83f64091 | bellard | if (len > count)
|
674 | 83f64091 | bellard | len = count; |
675 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
676 | 83f64091 | bellard | if (len > 0) { |
677 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
678 | 83f64091 | bellard | return -EIO;
|
679 | 83f64091 | bellard | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len);
|
680 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
681 | 83f64091 | bellard | return -EIO;
|
682 | 83f64091 | bellard | count -= len; |
683 | 83f64091 | bellard | if (count == 0) |
684 | 83f64091 | bellard | return count1;
|
685 | 83f64091 | bellard | sector_num++; |
686 | 83f64091 | bellard | buf += len; |
687 | 83f64091 | bellard | } |
688 | 83f64091 | bellard | |
689 | 83f64091 | bellard | /* write the sectors "in place" */
|
690 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
691 | 83f64091 | bellard | if (nb_sectors > 0) { |
692 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
693 | 83f64091 | bellard | return -EIO;
|
694 | 83f64091 | bellard | sector_num += nb_sectors; |
695 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
696 | 83f64091 | bellard | buf += len; |
697 | 83f64091 | bellard | count -= len; |
698 | 83f64091 | bellard | } |
699 | 83f64091 | bellard | |
700 | 83f64091 | bellard | /* add data from the last sector */
|
701 | 83f64091 | bellard | if (count > 0) { |
702 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
703 | 83f64091 | bellard | return -EIO;
|
704 | 83f64091 | bellard | memcpy(tmp_buf, buf, count); |
705 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
706 | 83f64091 | bellard | return -EIO;
|
707 | 83f64091 | bellard | } |
708 | 83f64091 | bellard | return count1;
|
709 | 83f64091 | bellard | } |
710 | 83f64091 | bellard | |
711 | 83f64091 | bellard | /**
|
712 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
713 | 83f64091 | bellard | */
|
714 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
715 | 83f64091 | bellard | { |
716 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
717 | 83f64091 | bellard | if (!drv)
|
718 | 19cb3738 | bellard | return -ENOMEDIUM;
|
719 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
720 | 83f64091 | bellard | return -ENOTSUP;
|
721 | 83f64091 | bellard | return drv->bdrv_truncate(bs, offset);
|
722 | 83f64091 | bellard | } |
723 | 83f64091 | bellard | |
724 | 83f64091 | bellard | /**
|
725 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
726 | 83f64091 | bellard | */
|
727 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
728 | 83f64091 | bellard | { |
729 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
730 | 83f64091 | bellard | if (!drv)
|
731 | 19cb3738 | bellard | return -ENOMEDIUM;
|
732 | 83f64091 | bellard | if (!drv->bdrv_getlength) {
|
733 | 83f64091 | bellard | /* legacy mode */
|
734 | 83f64091 | bellard | return bs->total_sectors * SECTOR_SIZE;
|
735 | 83f64091 | bellard | } |
736 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
737 | fc01f7e7 | bellard | } |
738 | fc01f7e7 | bellard | |
739 | 19cb3738 | bellard | /* return 0 as number of sectors if no device present or error */
|
740 | 96b8f136 | ths | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
|
741 | fc01f7e7 | bellard | { |
742 | 19cb3738 | bellard | int64_t length; |
743 | 19cb3738 | bellard | length = bdrv_getlength(bs); |
744 | 19cb3738 | bellard | if (length < 0) |
745 | 19cb3738 | bellard | length = 0;
|
746 | 19cb3738 | bellard | else
|
747 | 19cb3738 | bellard | length = length >> SECTOR_BITS; |
748 | 19cb3738 | bellard | *nb_sectors_ptr = length; |
749 | fc01f7e7 | bellard | } |
750 | cf98951b | bellard | |
751 | f3d54fc4 | aliguori | struct partition {
|
752 | f3d54fc4 | aliguori | uint8_t boot_ind; /* 0x80 - active */
|
753 | f3d54fc4 | aliguori | uint8_t head; /* starting head */
|
754 | f3d54fc4 | aliguori | uint8_t sector; /* starting sector */
|
755 | f3d54fc4 | aliguori | uint8_t cyl; /* starting cylinder */
|
756 | f3d54fc4 | aliguori | uint8_t sys_ind; /* What partition type */
|
757 | f3d54fc4 | aliguori | uint8_t end_head; /* end head */
|
758 | f3d54fc4 | aliguori | uint8_t end_sector; /* end sector */
|
759 | f3d54fc4 | aliguori | uint8_t end_cyl; /* end cylinder */
|
760 | f3d54fc4 | aliguori | uint32_t start_sect; /* starting sector counting from 0 */
|
761 | f3d54fc4 | aliguori | uint32_t nr_sects; /* nr of sectors in partition */
|
762 | f3d54fc4 | aliguori | } __attribute__((packed)); |
763 | f3d54fc4 | aliguori | |
764 | f3d54fc4 | aliguori | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */
|
765 | f3d54fc4 | aliguori | static int guess_disk_lchs(BlockDriverState *bs, |
766 | f3d54fc4 | aliguori | int *pcylinders, int *pheads, int *psectors) |
767 | f3d54fc4 | aliguori | { |
768 | f3d54fc4 | aliguori | uint8_t buf[512];
|
769 | f3d54fc4 | aliguori | int ret, i, heads, sectors, cylinders;
|
770 | f3d54fc4 | aliguori | struct partition *p;
|
771 | f3d54fc4 | aliguori | uint32_t nr_sects; |
772 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
773 | f3d54fc4 | aliguori | |
774 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
775 | f3d54fc4 | aliguori | |
776 | f3d54fc4 | aliguori | ret = bdrv_read(bs, 0, buf, 1); |
777 | f3d54fc4 | aliguori | if (ret < 0) |
778 | f3d54fc4 | aliguori | return -1; |
779 | f3d54fc4 | aliguori | /* test msdos magic */
|
780 | f3d54fc4 | aliguori | if (buf[510] != 0x55 || buf[511] != 0xaa) |
781 | f3d54fc4 | aliguori | return -1; |
782 | f3d54fc4 | aliguori | for(i = 0; i < 4; i++) { |
783 | f3d54fc4 | aliguori | p = ((struct partition *)(buf + 0x1be)) + i; |
784 | f3d54fc4 | aliguori | nr_sects = le32_to_cpu(p->nr_sects); |
785 | f3d54fc4 | aliguori | if (nr_sects && p->end_head) {
|
786 | f3d54fc4 | aliguori | /* We make the assumption that the partition terminates on
|
787 | f3d54fc4 | aliguori | a cylinder boundary */
|
788 | f3d54fc4 | aliguori | heads = p->end_head + 1;
|
789 | f3d54fc4 | aliguori | sectors = p->end_sector & 63;
|
790 | f3d54fc4 | aliguori | if (sectors == 0) |
791 | f3d54fc4 | aliguori | continue;
|
792 | f3d54fc4 | aliguori | cylinders = nb_sectors / (heads * sectors); |
793 | f3d54fc4 | aliguori | if (cylinders < 1 || cylinders > 16383) |
794 | f3d54fc4 | aliguori | continue;
|
795 | f3d54fc4 | aliguori | *pheads = heads; |
796 | f3d54fc4 | aliguori | *psectors = sectors; |
797 | f3d54fc4 | aliguori | *pcylinders = cylinders; |
798 | f3d54fc4 | aliguori | #if 0
|
799 | f3d54fc4 | aliguori | printf("guessed geometry: LCHS=%d %d %d\n",
|
800 | f3d54fc4 | aliguori | cylinders, heads, sectors);
|
801 | f3d54fc4 | aliguori | #endif
|
802 | f3d54fc4 | aliguori | return 0; |
803 | f3d54fc4 | aliguori | } |
804 | f3d54fc4 | aliguori | } |
805 | f3d54fc4 | aliguori | return -1; |
806 | f3d54fc4 | aliguori | } |
807 | f3d54fc4 | aliguori | |
808 | f3d54fc4 | aliguori | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) |
809 | f3d54fc4 | aliguori | { |
810 | f3d54fc4 | aliguori | int translation, lba_detected = 0; |
811 | f3d54fc4 | aliguori | int cylinders, heads, secs;
|
812 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
813 | f3d54fc4 | aliguori | |
814 | f3d54fc4 | aliguori | /* if a geometry hint is available, use it */
|
815 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
816 | f3d54fc4 | aliguori | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); |
817 | f3d54fc4 | aliguori | translation = bdrv_get_translation_hint(bs); |
818 | f3d54fc4 | aliguori | if (cylinders != 0) { |
819 | f3d54fc4 | aliguori | *pcyls = cylinders; |
820 | f3d54fc4 | aliguori | *pheads = heads; |
821 | f3d54fc4 | aliguori | *psecs = secs; |
822 | f3d54fc4 | aliguori | } else {
|
823 | f3d54fc4 | aliguori | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { |
824 | f3d54fc4 | aliguori | if (heads > 16) { |
825 | f3d54fc4 | aliguori | /* if heads > 16, it means that a BIOS LBA
|
826 | f3d54fc4 | aliguori | translation was active, so the default
|
827 | f3d54fc4 | aliguori | hardware geometry is OK */
|
828 | f3d54fc4 | aliguori | lba_detected = 1;
|
829 | f3d54fc4 | aliguori | goto default_geometry;
|
830 | f3d54fc4 | aliguori | } else {
|
831 | f3d54fc4 | aliguori | *pcyls = cylinders; |
832 | f3d54fc4 | aliguori | *pheads = heads; |
833 | f3d54fc4 | aliguori | *psecs = secs; |
834 | f3d54fc4 | aliguori | /* disable any translation to be in sync with
|
835 | f3d54fc4 | aliguori | the logical geometry */
|
836 | f3d54fc4 | aliguori | if (translation == BIOS_ATA_TRANSLATION_AUTO) {
|
837 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
838 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_NONE); |
839 | f3d54fc4 | aliguori | } |
840 | f3d54fc4 | aliguori | } |
841 | f3d54fc4 | aliguori | } else {
|
842 | f3d54fc4 | aliguori | default_geometry:
|
843 | f3d54fc4 | aliguori | /* if no geometry, use a standard physical disk geometry */
|
844 | f3d54fc4 | aliguori | cylinders = nb_sectors / (16 * 63); |
845 | f3d54fc4 | aliguori | |
846 | f3d54fc4 | aliguori | if (cylinders > 16383) |
847 | f3d54fc4 | aliguori | cylinders = 16383;
|
848 | f3d54fc4 | aliguori | else if (cylinders < 2) |
849 | f3d54fc4 | aliguori | cylinders = 2;
|
850 | f3d54fc4 | aliguori | *pcyls = cylinders; |
851 | f3d54fc4 | aliguori | *pheads = 16;
|
852 | f3d54fc4 | aliguori | *psecs = 63;
|
853 | f3d54fc4 | aliguori | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { |
854 | f3d54fc4 | aliguori | if ((*pcyls * *pheads) <= 131072) { |
855 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
856 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LARGE); |
857 | f3d54fc4 | aliguori | } else {
|
858 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
859 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LBA); |
860 | f3d54fc4 | aliguori | } |
861 | f3d54fc4 | aliguori | } |
862 | f3d54fc4 | aliguori | } |
863 | f3d54fc4 | aliguori | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); |
864 | f3d54fc4 | aliguori | } |
865 | f3d54fc4 | aliguori | } |
866 | f3d54fc4 | aliguori | |
867 | 5fafdf24 | ths | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
868 | b338082b | bellard | int cyls, int heads, int secs) |
869 | b338082b | bellard | { |
870 | b338082b | bellard | bs->cyls = cyls; |
871 | b338082b | bellard | bs->heads = heads; |
872 | b338082b | bellard | bs->secs = secs; |
873 | b338082b | bellard | } |
874 | b338082b | bellard | |
875 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
876 | b338082b | bellard | { |
877 | b338082b | bellard | bs->type = type; |
878 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
879 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
880 | b338082b | bellard | } |
881 | b338082b | bellard | |
882 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
883 | 46d4767d | bellard | { |
884 | 46d4767d | bellard | bs->translation = translation; |
885 | 46d4767d | bellard | } |
886 | 46d4767d | bellard | |
887 | 5fafdf24 | ths | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
888 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
889 | b338082b | bellard | { |
890 | b338082b | bellard | *pcyls = bs->cyls; |
891 | b338082b | bellard | *pheads = bs->heads; |
892 | b338082b | bellard | *psecs = bs->secs; |
893 | b338082b | bellard | } |
894 | b338082b | bellard | |
895 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
896 | b338082b | bellard | { |
897 | b338082b | bellard | return bs->type;
|
898 | b338082b | bellard | } |
899 | b338082b | bellard | |
900 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
901 | 46d4767d | bellard | { |
902 | 46d4767d | bellard | return bs->translation;
|
903 | 46d4767d | bellard | } |
904 | 46d4767d | bellard | |
905 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
906 | b338082b | bellard | { |
907 | b338082b | bellard | return bs->removable;
|
908 | b338082b | bellard | } |
909 | b338082b | bellard | |
910 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
911 | b338082b | bellard | { |
912 | b338082b | bellard | return bs->read_only;
|
913 | b338082b | bellard | } |
914 | b338082b | bellard | |
915 | 985a03b0 | ths | int bdrv_is_sg(BlockDriverState *bs)
|
916 | 985a03b0 | ths | { |
917 | 985a03b0 | ths | return bs->sg;
|
918 | 985a03b0 | ths | } |
919 | 985a03b0 | ths | |
920 | 19cb3738 | bellard | /* XXX: no longer used */
|
921 | 5fafdf24 | ths | void bdrv_set_change_cb(BlockDriverState *bs,
|
922 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
923 | b338082b | bellard | { |
924 | b338082b | bellard | bs->change_cb = change_cb; |
925 | b338082b | bellard | bs->change_opaque = opaque; |
926 | b338082b | bellard | } |
927 | b338082b | bellard | |
928 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
929 | ea2384d3 | bellard | { |
930 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
931 | ea2384d3 | bellard | return 1; |
932 | ea2384d3 | bellard | return bs->encrypted;
|
933 | ea2384d3 | bellard | } |
934 | ea2384d3 | bellard | |
935 | c0f4ce77 | aliguori | int bdrv_key_required(BlockDriverState *bs)
|
936 | c0f4ce77 | aliguori | { |
937 | c0f4ce77 | aliguori | BlockDriverState *backing_hd = bs->backing_hd; |
938 | c0f4ce77 | aliguori | |
939 | c0f4ce77 | aliguori | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key)
|
940 | c0f4ce77 | aliguori | return 1; |
941 | c0f4ce77 | aliguori | return (bs->encrypted && !bs->valid_key);
|
942 | c0f4ce77 | aliguori | } |
943 | c0f4ce77 | aliguori | |
944 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
945 | ea2384d3 | bellard | { |
946 | ea2384d3 | bellard | int ret;
|
947 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
948 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
949 | ea2384d3 | bellard | if (ret < 0) |
950 | ea2384d3 | bellard | return ret;
|
951 | ea2384d3 | bellard | if (!bs->encrypted)
|
952 | ea2384d3 | bellard | return 0; |
953 | ea2384d3 | bellard | } |
954 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
955 | ea2384d3 | bellard | return -1; |
956 | c0f4ce77 | aliguori | ret = bs->drv->bdrv_set_key(bs, key); |
957 | bb5fc20f | aliguori | if (ret < 0) { |
958 | bb5fc20f | aliguori | bs->valid_key = 0;
|
959 | bb5fc20f | aliguori | } else if (!bs->valid_key) { |
960 | bb5fc20f | aliguori | bs->valid_key = 1;
|
961 | bb5fc20f | aliguori | /* call the change callback now, we skipped it on open */
|
962 | bb5fc20f | aliguori | bs->media_changed = 1;
|
963 | bb5fc20f | aliguori | if (bs->change_cb)
|
964 | bb5fc20f | aliguori | bs->change_cb(bs->change_opaque); |
965 | bb5fc20f | aliguori | } |
966 | c0f4ce77 | aliguori | return ret;
|
967 | ea2384d3 | bellard | } |
968 | ea2384d3 | bellard | |
969 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
970 | ea2384d3 | bellard | { |
971 | 19cb3738 | bellard | if (!bs->drv) {
|
972 | ea2384d3 | bellard | buf[0] = '\0'; |
973 | ea2384d3 | bellard | } else {
|
974 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
975 | ea2384d3 | bellard | } |
976 | ea2384d3 | bellard | } |
977 | ea2384d3 | bellard | |
978 | 5fafdf24 | ths | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
979 | ea2384d3 | bellard | void *opaque)
|
980 | ea2384d3 | bellard | { |
981 | ea2384d3 | bellard | BlockDriver *drv; |
982 | ea2384d3 | bellard | |
983 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
984 | ea2384d3 | bellard | it(opaque, drv->format_name); |
985 | ea2384d3 | bellard | } |
986 | ea2384d3 | bellard | } |
987 | ea2384d3 | bellard | |
988 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
989 | b338082b | bellard | { |
990 | b338082b | bellard | BlockDriverState *bs; |
991 | b338082b | bellard | |
992 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
993 | b338082b | bellard | if (!strcmp(name, bs->device_name))
|
994 | b338082b | bellard | return bs;
|
995 | b338082b | bellard | } |
996 | b338082b | bellard | return NULL; |
997 | b338082b | bellard | } |
998 | b338082b | bellard | |
999 | 51de9760 | aliguori | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
1000 | 81d0912d | bellard | { |
1001 | 81d0912d | bellard | BlockDriverState *bs; |
1002 | 81d0912d | bellard | |
1003 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
1004 | 51de9760 | aliguori | it(opaque, bs); |
1005 | 81d0912d | bellard | } |
1006 | 81d0912d | bellard | } |
1007 | 81d0912d | bellard | |
1008 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
1009 | ea2384d3 | bellard | { |
1010 | ea2384d3 | bellard | return bs->device_name;
|
1011 | ea2384d3 | bellard | } |
1012 | ea2384d3 | bellard | |
1013 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
1014 | 7a6cba61 | pbrook | { |
1015 | 081501da | aliguori | if (!bs->drv)
|
1016 | 081501da | aliguori | return;
|
1017 | 7a6cba61 | pbrook | if (bs->drv->bdrv_flush)
|
1018 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
1019 | 7a6cba61 | pbrook | if (bs->backing_hd)
|
1020 | 7a6cba61 | pbrook | bdrv_flush(bs->backing_hd); |
1021 | 7a6cba61 | pbrook | } |
1022 | 7a6cba61 | pbrook | |
1023 | c6ca28d6 | aliguori | void bdrv_flush_all(void) |
1024 | c6ca28d6 | aliguori | { |
1025 | c6ca28d6 | aliguori | BlockDriverState *bs; |
1026 | c6ca28d6 | aliguori | |
1027 | c6ca28d6 | aliguori | for (bs = bdrv_first; bs != NULL; bs = bs->next) |
1028 | c6ca28d6 | aliguori | if (bs->drv && !bdrv_is_read_only(bs) &&
|
1029 | c6ca28d6 | aliguori | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) |
1030 | c6ca28d6 | aliguori | bdrv_flush(bs); |
1031 | c6ca28d6 | aliguori | } |
1032 | c6ca28d6 | aliguori | |
1033 | f58c7b35 | ths | /*
|
1034 | f58c7b35 | ths | * Returns true iff the specified sector is present in the disk image. Drivers
|
1035 | f58c7b35 | ths | * not implementing the functionality are assumed to not support backing files,
|
1036 | f58c7b35 | ths | * hence all their sectors are reported as allocated.
|
1037 | f58c7b35 | ths | *
|
1038 | f58c7b35 | ths | * 'pnum' is set to the number of sectors (including and immediately following
|
1039 | f58c7b35 | ths | * the specified sector) that are known to be in the same
|
1040 | f58c7b35 | ths | * allocated/unallocated state.
|
1041 | f58c7b35 | ths | *
|
1042 | f58c7b35 | ths | * 'nb_sectors' is the max value 'pnum' should be set to.
|
1043 | f58c7b35 | ths | */
|
1044 | f58c7b35 | ths | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
1045 | f58c7b35 | ths | int *pnum)
|
1046 | f58c7b35 | ths | { |
1047 | f58c7b35 | ths | int64_t n; |
1048 | f58c7b35 | ths | if (!bs->drv->bdrv_is_allocated) {
|
1049 | f58c7b35 | ths | if (sector_num >= bs->total_sectors) {
|
1050 | f58c7b35 | ths | *pnum = 0;
|
1051 | f58c7b35 | ths | return 0; |
1052 | f58c7b35 | ths | } |
1053 | f58c7b35 | ths | n = bs->total_sectors - sector_num; |
1054 | f58c7b35 | ths | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); |
1055 | f58c7b35 | ths | return 1; |
1056 | f58c7b35 | ths | } |
1057 | f58c7b35 | ths | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum);
|
1058 | f58c7b35 | ths | } |
1059 | f58c7b35 | ths | |
1060 | 376253ec | aliguori | void bdrv_info(Monitor *mon)
|
1061 | b338082b | bellard | { |
1062 | b338082b | bellard | BlockDriverState *bs; |
1063 | b338082b | bellard | |
1064 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
1065 | 376253ec | aliguori | monitor_printf(mon, "%s:", bs->device_name);
|
1066 | 376253ec | aliguori | monitor_printf(mon, " type=");
|
1067 | b338082b | bellard | switch(bs->type) {
|
1068 | b338082b | bellard | case BDRV_TYPE_HD:
|
1069 | 376253ec | aliguori | monitor_printf(mon, "hd");
|
1070 | b338082b | bellard | break;
|
1071 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
1072 | 376253ec | aliguori | monitor_printf(mon, "cdrom");
|
1073 | b338082b | bellard | break;
|
1074 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
1075 | 376253ec | aliguori | monitor_printf(mon, "floppy");
|
1076 | b338082b | bellard | break;
|
1077 | b338082b | bellard | } |
1078 | 376253ec | aliguori | monitor_printf(mon, " removable=%d", bs->removable);
|
1079 | b338082b | bellard | if (bs->removable) {
|
1080 | 376253ec | aliguori | monitor_printf(mon, " locked=%d", bs->locked);
|
1081 | b338082b | bellard | } |
1082 | 19cb3738 | bellard | if (bs->drv) {
|
1083 | 376253ec | aliguori | monitor_printf(mon, " file=");
|
1084 | 376253ec | aliguori | monitor_print_filename(mon, bs->filename); |
1085 | fef30743 | ths | if (bs->backing_file[0] != '\0') { |
1086 | 376253ec | aliguori | monitor_printf(mon, " backing_file=");
|
1087 | 376253ec | aliguori | monitor_print_filename(mon, bs->backing_file); |
1088 | 376253ec | aliguori | } |
1089 | 376253ec | aliguori | monitor_printf(mon, " ro=%d", bs->read_only);
|
1090 | 376253ec | aliguori | monitor_printf(mon, " drv=%s", bs->drv->format_name);
|
1091 | 376253ec | aliguori | monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs));
|
1092 | b338082b | bellard | } else {
|
1093 | 376253ec | aliguori | monitor_printf(mon, " [not inserted]");
|
1094 | b338082b | bellard | } |
1095 | 376253ec | aliguori | monitor_printf(mon, "\n");
|
1096 | b338082b | bellard | } |
1097 | b338082b | bellard | } |
1098 | a36e69dd | ths | |
1099 | a36e69dd | ths | /* The "info blockstats" command. */
|
1100 | 376253ec | aliguori | void bdrv_info_stats(Monitor *mon)
|
1101 | a36e69dd | ths | { |
1102 | a36e69dd | ths | BlockDriverState *bs; |
1103 | a36e69dd | ths | |
1104 | a36e69dd | ths | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
1105 | 376253ec | aliguori | monitor_printf(mon, "%s:"
|
1106 | 376253ec | aliguori | " rd_bytes=%" PRIu64
|
1107 | 376253ec | aliguori | " wr_bytes=%" PRIu64
|
1108 | 376253ec | aliguori | " rd_operations=%" PRIu64
|
1109 | 376253ec | aliguori | " wr_operations=%" PRIu64
|
1110 | ebf53fcd | aliguori | "\n",
|
1111 | 376253ec | aliguori | bs->device_name, |
1112 | 376253ec | aliguori | bs->rd_bytes, bs->wr_bytes, |
1113 | 376253ec | aliguori | bs->rd_ops, bs->wr_ops); |
1114 | a36e69dd | ths | } |
1115 | a36e69dd | ths | } |
1116 | ea2384d3 | bellard | |
1117 | 045df330 | aliguori | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1118 | 045df330 | aliguori | { |
1119 | 045df330 | aliguori | if (bs->backing_hd && bs->backing_hd->encrypted)
|
1120 | 045df330 | aliguori | return bs->backing_file;
|
1121 | 045df330 | aliguori | else if (bs->encrypted) |
1122 | 045df330 | aliguori | return bs->filename;
|
1123 | 045df330 | aliguori | else
|
1124 | 045df330 | aliguori | return NULL; |
1125 | 045df330 | aliguori | } |
1126 | 045df330 | aliguori | |
1127 | 5fafdf24 | ths | void bdrv_get_backing_filename(BlockDriverState *bs,
|
1128 | 83f64091 | bellard | char *filename, int filename_size) |
1129 | 83f64091 | bellard | { |
1130 | 83f64091 | bellard | if (!bs->backing_hd) {
|
1131 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
1132 | 83f64091 | bellard | } else {
|
1133 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
1134 | 83f64091 | bellard | } |
1135 | 83f64091 | bellard | } |
1136 | 83f64091 | bellard | |
1137 | 5fafdf24 | ths | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
1138 | faea38e7 | bellard | const uint8_t *buf, int nb_sectors) |
1139 | faea38e7 | bellard | { |
1140 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1141 | faea38e7 | bellard | if (!drv)
|
1142 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1143 | faea38e7 | bellard | if (!drv->bdrv_write_compressed)
|
1144 | faea38e7 | bellard | return -ENOTSUP;
|
1145 | fbb7b4e0 | Kevin Wolf | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1146 | fbb7b4e0 | Kevin Wolf | return -EIO;
|
1147 | faea38e7 | bellard | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
|
1148 | faea38e7 | bellard | } |
1149 | 3b46e624 | ths | |
1150 | faea38e7 | bellard | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
1151 | faea38e7 | bellard | { |
1152 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1153 | faea38e7 | bellard | if (!drv)
|
1154 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1155 | faea38e7 | bellard | if (!drv->bdrv_get_info)
|
1156 | faea38e7 | bellard | return -ENOTSUP;
|
1157 | faea38e7 | bellard | memset(bdi, 0, sizeof(*bdi)); |
1158 | faea38e7 | bellard | return drv->bdrv_get_info(bs, bdi);
|
1159 | faea38e7 | bellard | } |
1160 | faea38e7 | bellard | |
1161 | 45566e9c | Christoph Hellwig | int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
1162 | 45566e9c | Christoph Hellwig | int64_t pos, int size)
|
1163 | 178e08a5 | aliguori | { |
1164 | 178e08a5 | aliguori | BlockDriver *drv = bs->drv; |
1165 | 178e08a5 | aliguori | if (!drv)
|
1166 | 178e08a5 | aliguori | return -ENOMEDIUM;
|
1167 | 45566e9c | Christoph Hellwig | if (!drv->bdrv_save_vmstate)
|
1168 | 178e08a5 | aliguori | return -ENOTSUP;
|
1169 | 45566e9c | Christoph Hellwig | return drv->bdrv_save_vmstate(bs, buf, pos, size);
|
1170 | 178e08a5 | aliguori | } |
1171 | 178e08a5 | aliguori | |
1172 | 45566e9c | Christoph Hellwig | int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
1173 | 45566e9c | Christoph Hellwig | int64_t pos, int size)
|
1174 | 178e08a5 | aliguori | { |
1175 | 178e08a5 | aliguori | BlockDriver *drv = bs->drv; |
1176 | 178e08a5 | aliguori | if (!drv)
|
1177 | 178e08a5 | aliguori | return -ENOMEDIUM;
|
1178 | 45566e9c | Christoph Hellwig | if (!drv->bdrv_load_vmstate)
|
1179 | 178e08a5 | aliguori | return -ENOTSUP;
|
1180 | 45566e9c | Christoph Hellwig | return drv->bdrv_load_vmstate(bs, buf, pos, size);
|
1181 | 178e08a5 | aliguori | } |
1182 | 178e08a5 | aliguori | |
1183 | faea38e7 | bellard | /**************************************************************/
|
1184 | faea38e7 | bellard | /* handling of snapshots */
|
1185 | faea38e7 | bellard | |
1186 | 5fafdf24 | ths | int bdrv_snapshot_create(BlockDriverState *bs,
|
1187 | faea38e7 | bellard | QEMUSnapshotInfo *sn_info) |
1188 | faea38e7 | bellard | { |
1189 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1190 | faea38e7 | bellard | if (!drv)
|
1191 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1192 | faea38e7 | bellard | if (!drv->bdrv_snapshot_create)
|
1193 | faea38e7 | bellard | return -ENOTSUP;
|
1194 | faea38e7 | bellard | return drv->bdrv_snapshot_create(bs, sn_info);
|
1195 | faea38e7 | bellard | } |
1196 | faea38e7 | bellard | |
1197 | 5fafdf24 | ths | int bdrv_snapshot_goto(BlockDriverState *bs,
|
1198 | faea38e7 | bellard | const char *snapshot_id) |
1199 | faea38e7 | bellard | { |
1200 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1201 | faea38e7 | bellard | if (!drv)
|
1202 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1203 | faea38e7 | bellard | if (!drv->bdrv_snapshot_goto)
|
1204 | faea38e7 | bellard | return -ENOTSUP;
|
1205 | faea38e7 | bellard | return drv->bdrv_snapshot_goto(bs, snapshot_id);
|
1206 | faea38e7 | bellard | } |
1207 | faea38e7 | bellard | |
1208 | faea38e7 | bellard | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
1209 | faea38e7 | bellard | { |
1210 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1211 | faea38e7 | bellard | if (!drv)
|
1212 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1213 | faea38e7 | bellard | if (!drv->bdrv_snapshot_delete)
|
1214 | faea38e7 | bellard | return -ENOTSUP;
|
1215 | faea38e7 | bellard | return drv->bdrv_snapshot_delete(bs, snapshot_id);
|
1216 | faea38e7 | bellard | } |
1217 | faea38e7 | bellard | |
1218 | 5fafdf24 | ths | int bdrv_snapshot_list(BlockDriverState *bs,
|
1219 | faea38e7 | bellard | QEMUSnapshotInfo **psn_info) |
1220 | faea38e7 | bellard | { |
1221 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1222 | faea38e7 | bellard | if (!drv)
|
1223 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1224 | faea38e7 | bellard | if (!drv->bdrv_snapshot_list)
|
1225 | faea38e7 | bellard | return -ENOTSUP;
|
1226 | faea38e7 | bellard | return drv->bdrv_snapshot_list(bs, psn_info);
|
1227 | faea38e7 | bellard | } |
1228 | faea38e7 | bellard | |
1229 | faea38e7 | bellard | #define NB_SUFFIXES 4 |
1230 | faea38e7 | bellard | |
1231 | faea38e7 | bellard | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
1232 | faea38e7 | bellard | { |
1233 | faea38e7 | bellard | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
1234 | faea38e7 | bellard | int64_t base; |
1235 | faea38e7 | bellard | int i;
|
1236 | faea38e7 | bellard | |
1237 | faea38e7 | bellard | if (size <= 999) { |
1238 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64, size);
|
1239 | faea38e7 | bellard | } else {
|
1240 | faea38e7 | bellard | base = 1024;
|
1241 | faea38e7 | bellard | for(i = 0; i < NB_SUFFIXES; i++) { |
1242 | faea38e7 | bellard | if (size < (10 * base)) { |
1243 | 5fafdf24 | ths | snprintf(buf, buf_size, "%0.1f%c",
|
1244 | faea38e7 | bellard | (double)size / base,
|
1245 | faea38e7 | bellard | suffixes[i]); |
1246 | faea38e7 | bellard | break;
|
1247 | faea38e7 | bellard | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
1248 | 5fafdf24 | ths | snprintf(buf, buf_size, "%" PRId64 "%c", |
1249 | faea38e7 | bellard | ((size + (base >> 1)) / base),
|
1250 | faea38e7 | bellard | suffixes[i]); |
1251 | faea38e7 | bellard | break;
|
1252 | faea38e7 | bellard | } |
1253 | faea38e7 | bellard | base = base * 1024;
|
1254 | faea38e7 | bellard | } |
1255 | faea38e7 | bellard | } |
1256 | faea38e7 | bellard | return buf;
|
1257 | faea38e7 | bellard | } |
1258 | faea38e7 | bellard | |
1259 | faea38e7 | bellard | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
1260 | faea38e7 | bellard | { |
1261 | faea38e7 | bellard | char buf1[128], date_buf[128], clock_buf[128]; |
1262 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1263 | 3b9f94e1 | bellard | struct tm *ptm;
|
1264 | 3b9f94e1 | bellard | #else
|
1265 | faea38e7 | bellard | struct tm tm;
|
1266 | 3b9f94e1 | bellard | #endif
|
1267 | faea38e7 | bellard | time_t ti; |
1268 | faea38e7 | bellard | int64_t secs; |
1269 | faea38e7 | bellard | |
1270 | faea38e7 | bellard | if (!sn) {
|
1271 | 5fafdf24 | ths | snprintf(buf, buf_size, |
1272 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1273 | faea38e7 | bellard | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1274 | faea38e7 | bellard | } else {
|
1275 | faea38e7 | bellard | ti = sn->date_sec; |
1276 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1277 | 3b9f94e1 | bellard | ptm = localtime(&ti); |
1278 | 3b9f94e1 | bellard | strftime(date_buf, sizeof(date_buf),
|
1279 | 3b9f94e1 | bellard | "%Y-%m-%d %H:%M:%S", ptm);
|
1280 | 3b9f94e1 | bellard | #else
|
1281 | faea38e7 | bellard | localtime_r(&ti, &tm); |
1282 | faea38e7 | bellard | strftime(date_buf, sizeof(date_buf),
|
1283 | faea38e7 | bellard | "%Y-%m-%d %H:%M:%S", &tm);
|
1284 | 3b9f94e1 | bellard | #endif
|
1285 | faea38e7 | bellard | secs = sn->vm_clock_nsec / 1000000000;
|
1286 | faea38e7 | bellard | snprintf(clock_buf, sizeof(clock_buf),
|
1287 | faea38e7 | bellard | "%02d:%02d:%02d.%03d",
|
1288 | faea38e7 | bellard | (int)(secs / 3600), |
1289 | faea38e7 | bellard | (int)((secs / 60) % 60), |
1290 | 5fafdf24 | ths | (int)(secs % 60), |
1291 | faea38e7 | bellard | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1292 | faea38e7 | bellard | snprintf(buf, buf_size, |
1293 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1294 | faea38e7 | bellard | sn->id_str, sn->name, |
1295 | faea38e7 | bellard | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
|
1296 | faea38e7 | bellard | date_buf, |
1297 | faea38e7 | bellard | clock_buf); |
1298 | faea38e7 | bellard | } |
1299 | faea38e7 | bellard | return buf;
|
1300 | faea38e7 | bellard | } |
1301 | faea38e7 | bellard | |
1302 | 83f64091 | bellard | |
1303 | ea2384d3 | bellard | /**************************************************************/
|
1304 | 83f64091 | bellard | /* async I/Os */
|
1305 | ea2384d3 | bellard | |
1306 | 3b69e4b9 | aliguori | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
1307 | f141eafe | aliguori | QEMUIOVector *qiov, int nb_sectors,
|
1308 | 3b69e4b9 | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1309 | 3b69e4b9 | aliguori | { |
1310 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1311 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1312 | 83f64091 | bellard | |
1313 | 19cb3738 | bellard | if (!drv)
|
1314 | ce1a14dc | pbrook | return NULL; |
1315 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1316 | 71d0770c | aliguori | return NULL; |
1317 | 3b46e624 | ths | |
1318 | f141eafe | aliguori | ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors, |
1319 | f141eafe | aliguori | cb, opaque); |
1320 | a36e69dd | ths | |
1321 | a36e69dd | ths | if (ret) {
|
1322 | a36e69dd | ths | /* Update stats even though technically transfer has not happened. */
|
1323 | a36e69dd | ths | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
|
1324 | a36e69dd | ths | bs->rd_ops ++; |
1325 | a36e69dd | ths | } |
1326 | a36e69dd | ths | |
1327 | a36e69dd | ths | return ret;
|
1328 | ea2384d3 | bellard | } |
1329 | ea2384d3 | bellard | |
1330 | f141eafe | aliguori | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
1331 | f141eafe | aliguori | QEMUIOVector *qiov, int nb_sectors,
|
1332 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1333 | ea2384d3 | bellard | { |
1334 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1335 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1336 | ea2384d3 | bellard | |
1337 | 19cb3738 | bellard | if (!drv)
|
1338 | ce1a14dc | pbrook | return NULL; |
1339 | 83f64091 | bellard | if (bs->read_only)
|
1340 | ce1a14dc | pbrook | return NULL; |
1341 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1342 | 71d0770c | aliguori | return NULL; |
1343 | 83f64091 | bellard | |
1344 | f141eafe | aliguori | ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
1345 | f141eafe | aliguori | cb, opaque); |
1346 | a36e69dd | ths | |
1347 | a36e69dd | ths | if (ret) {
|
1348 | a36e69dd | ths | /* Update stats even though technically transfer has not happened. */
|
1349 | a36e69dd | ths | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
|
1350 | a36e69dd | ths | bs->wr_ops ++; |
1351 | a36e69dd | ths | } |
1352 | a36e69dd | ths | |
1353 | a36e69dd | ths | return ret;
|
1354 | 83f64091 | bellard | } |
1355 | 83f64091 | bellard | |
1356 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
1357 | 83f64091 | bellard | { |
1358 | 6bbff9a0 | aliguori | acb->pool->cancel(acb); |
1359 | 83f64091 | bellard | } |
1360 | 83f64091 | bellard | |
1361 | ce1a14dc | pbrook | |
1362 | 83f64091 | bellard | /**************************************************************/
|
1363 | 83f64091 | bellard | /* async block device emulation */
|
1364 | 83f64091 | bellard | |
1365 | c16b5a2c | Christoph Hellwig | typedef struct BlockDriverAIOCBSync { |
1366 | c16b5a2c | Christoph Hellwig | BlockDriverAIOCB common; |
1367 | c16b5a2c | Christoph Hellwig | QEMUBH *bh; |
1368 | c16b5a2c | Christoph Hellwig | int ret;
|
1369 | c16b5a2c | Christoph Hellwig | /* vector translation state */
|
1370 | c16b5a2c | Christoph Hellwig | QEMUIOVector *qiov; |
1371 | c16b5a2c | Christoph Hellwig | uint8_t *bounce; |
1372 | c16b5a2c | Christoph Hellwig | int is_write;
|
1373 | c16b5a2c | Christoph Hellwig | } BlockDriverAIOCBSync; |
1374 | c16b5a2c | Christoph Hellwig | |
1375 | c16b5a2c | Christoph Hellwig | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
1376 | c16b5a2c | Christoph Hellwig | { |
1377 | c16b5a2c | Christoph Hellwig | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1378 | 6a7ad299 | Dor Laor | qemu_bh_delete(acb->bh); |
1379 | 36afc451 | Avi Kivity | acb->bh = NULL;
|
1380 | c16b5a2c | Christoph Hellwig | qemu_aio_release(acb); |
1381 | c16b5a2c | Christoph Hellwig | } |
1382 | c16b5a2c | Christoph Hellwig | |
1383 | c16b5a2c | Christoph Hellwig | static AIOPool bdrv_em_aio_pool = {
|
1384 | c16b5a2c | Christoph Hellwig | .aiocb_size = sizeof(BlockDriverAIOCBSync),
|
1385 | c16b5a2c | Christoph Hellwig | .cancel = bdrv_aio_cancel_em, |
1386 | c16b5a2c | Christoph Hellwig | }; |
1387 | c16b5a2c | Christoph Hellwig | |
1388 | ce1a14dc | pbrook | static void bdrv_aio_bh_cb(void *opaque) |
1389 | 83f64091 | bellard | { |
1390 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = opaque; |
1391 | f141eafe | aliguori | |
1392 | f141eafe | aliguori | if (!acb->is_write)
|
1393 | f141eafe | aliguori | qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size); |
1394 | ceb42de8 | aliguori | qemu_vfree(acb->bounce); |
1395 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, acb->ret); |
1396 | 6a7ad299 | Dor Laor | qemu_bh_delete(acb->bh); |
1397 | 36afc451 | Avi Kivity | acb->bh = NULL;
|
1398 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1399 | 83f64091 | bellard | } |
1400 | beac80cd | bellard | |
1401 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
|
1402 | f141eafe | aliguori | int64_t sector_num, |
1403 | f141eafe | aliguori | QEMUIOVector *qiov, |
1404 | f141eafe | aliguori | int nb_sectors,
|
1405 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, |
1406 | f141eafe | aliguori | void *opaque,
|
1407 | f141eafe | aliguori | int is_write)
|
1408 | f141eafe | aliguori | |
1409 | 83f64091 | bellard | { |
1410 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1411 | ce1a14dc | pbrook | |
1412 | c16b5a2c | Christoph Hellwig | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
1413 | f141eafe | aliguori | acb->is_write = is_write; |
1414 | f141eafe | aliguori | acb->qiov = qiov; |
1415 | e268ca52 | aliguori | acb->bounce = qemu_blockalign(bs, qiov->size); |
1416 | f141eafe | aliguori | |
1417 | ce1a14dc | pbrook | if (!acb->bh)
|
1418 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1419 | f141eafe | aliguori | |
1420 | f141eafe | aliguori | if (is_write) {
|
1421 | f141eafe | aliguori | qemu_iovec_to_buffer(acb->qiov, acb->bounce); |
1422 | f141eafe | aliguori | acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors); |
1423 | f141eafe | aliguori | } else {
|
1424 | f141eafe | aliguori | acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors); |
1425 | f141eafe | aliguori | } |
1426 | f141eafe | aliguori | |
1427 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1428 | f141eafe | aliguori | |
1429 | ce1a14dc | pbrook | return &acb->common;
|
1430 | beac80cd | bellard | } |
1431 | beac80cd | bellard | |
1432 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
|
1433 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
1434 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1435 | beac80cd | bellard | { |
1436 | f141eafe | aliguori | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); |
1437 | f141eafe | aliguori | } |
1438 | 83f64091 | bellard | |
1439 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
|
1440 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
1441 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1442 | f141eafe | aliguori | { |
1443 | f141eafe | aliguori | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
1444 | beac80cd | bellard | } |
1445 | beac80cd | bellard | |
1446 | 83f64091 | bellard | /**************************************************************/
|
1447 | 83f64091 | bellard | /* sync block device emulation */
|
1448 | ea2384d3 | bellard | |
1449 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
1450 | 83f64091 | bellard | { |
1451 | 83f64091 | bellard | *(int *)opaque = ret;
|
1452 | ea2384d3 | bellard | } |
1453 | ea2384d3 | bellard | |
1454 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
1455 | 83f64091 | bellard | |
1456 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
1457 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1458 | 7a6cba61 | pbrook | { |
1459 | ce1a14dc | pbrook | int async_ret;
|
1460 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1461 | f141eafe | aliguori | struct iovec iov;
|
1462 | f141eafe | aliguori | QEMUIOVector qiov; |
1463 | 83f64091 | bellard | |
1464 | 83f64091 | bellard | async_ret = NOT_DONE; |
1465 | 3f4cb3d3 | blueswir1 | iov.iov_base = (void *)buf;
|
1466 | f141eafe | aliguori | iov.iov_len = nb_sectors * 512;
|
1467 | f141eafe | aliguori | qemu_iovec_init_external(&qiov, &iov, 1);
|
1468 | f141eafe | aliguori | acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
1469 | f141eafe | aliguori | bdrv_rw_em_cb, &async_ret); |
1470 | baf35cb9 | aliguori | if (acb == NULL) |
1471 | ce1a14dc | pbrook | return -1; |
1472 | baf35cb9 | aliguori | |
1473 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1474 | 83f64091 | bellard | qemu_aio_wait(); |
1475 | 83f64091 | bellard | } |
1476 | baf35cb9 | aliguori | |
1477 | 83f64091 | bellard | return async_ret;
|
1478 | 7a6cba61 | pbrook | } |
1479 | 7a6cba61 | pbrook | |
1480 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1481 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1482 | 83f64091 | bellard | { |
1483 | ce1a14dc | pbrook | int async_ret;
|
1484 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1485 | f141eafe | aliguori | struct iovec iov;
|
1486 | f141eafe | aliguori | QEMUIOVector qiov; |
1487 | 83f64091 | bellard | |
1488 | 83f64091 | bellard | async_ret = NOT_DONE; |
1489 | f141eafe | aliguori | iov.iov_base = (void *)buf;
|
1490 | f141eafe | aliguori | iov.iov_len = nb_sectors * 512;
|
1491 | f141eafe | aliguori | qemu_iovec_init_external(&qiov, &iov, 1);
|
1492 | f141eafe | aliguori | acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
1493 | f141eafe | aliguori | bdrv_rw_em_cb, &async_ret); |
1494 | baf35cb9 | aliguori | if (acb == NULL) |
1495 | ce1a14dc | pbrook | return -1; |
1496 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1497 | 83f64091 | bellard | qemu_aio_wait(); |
1498 | 83f64091 | bellard | } |
1499 | 83f64091 | bellard | return async_ret;
|
1500 | 83f64091 | bellard | } |
1501 | ea2384d3 | bellard | |
1502 | ea2384d3 | bellard | void bdrv_init(void) |
1503 | ea2384d3 | bellard | { |
1504 | 5efa9d5a | Anthony Liguori | module_call_init(MODULE_INIT_BLOCK); |
1505 | ea2384d3 | bellard | } |
1506 | ce1a14dc | pbrook | |
1507 | c16b5a2c | Christoph Hellwig | void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs,
|
1508 | c16b5a2c | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
|
1509 | ce1a14dc | pbrook | { |
1510 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1511 | ce1a14dc | pbrook | |
1512 | 6bbff9a0 | aliguori | if (pool->free_aiocb) {
|
1513 | 6bbff9a0 | aliguori | acb = pool->free_aiocb; |
1514 | 6bbff9a0 | aliguori | pool->free_aiocb = acb->next; |
1515 | ce1a14dc | pbrook | } else {
|
1516 | 6bbff9a0 | aliguori | acb = qemu_mallocz(pool->aiocb_size); |
1517 | 6bbff9a0 | aliguori | acb->pool = pool; |
1518 | ce1a14dc | pbrook | } |
1519 | ce1a14dc | pbrook | acb->bs = bs; |
1520 | ce1a14dc | pbrook | acb->cb = cb; |
1521 | ce1a14dc | pbrook | acb->opaque = opaque; |
1522 | ce1a14dc | pbrook | return acb;
|
1523 | ce1a14dc | pbrook | } |
1524 | ce1a14dc | pbrook | |
1525 | ce1a14dc | pbrook | void qemu_aio_release(void *p) |
1526 | ce1a14dc | pbrook | { |
1527 | 6bbff9a0 | aliguori | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
1528 | 6bbff9a0 | aliguori | AIOPool *pool = acb->pool; |
1529 | 6bbff9a0 | aliguori | acb->next = pool->free_aiocb; |
1530 | 6bbff9a0 | aliguori | pool->free_aiocb = acb; |
1531 | ce1a14dc | pbrook | } |
1532 | 19cb3738 | bellard | |
1533 | 19cb3738 | bellard | /**************************************************************/
|
1534 | 19cb3738 | bellard | /* removable device support */
|
1535 | 19cb3738 | bellard | |
1536 | 19cb3738 | bellard | /**
|
1537 | 19cb3738 | bellard | * Return TRUE if the media is present
|
1538 | 19cb3738 | bellard | */
|
1539 | 19cb3738 | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
1540 | 19cb3738 | bellard | { |
1541 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1542 | 19cb3738 | bellard | int ret;
|
1543 | 19cb3738 | bellard | if (!drv)
|
1544 | 19cb3738 | bellard | return 0; |
1545 | 19cb3738 | bellard | if (!drv->bdrv_is_inserted)
|
1546 | 19cb3738 | bellard | return 1; |
1547 | 19cb3738 | bellard | ret = drv->bdrv_is_inserted(bs); |
1548 | 19cb3738 | bellard | return ret;
|
1549 | 19cb3738 | bellard | } |
1550 | 19cb3738 | bellard | |
1551 | 19cb3738 | bellard | /**
|
1552 | 19cb3738 | bellard | * Return TRUE if the media changed since the last call to this
|
1553 | 5fafdf24 | ths | * function. It is currently only used for floppy disks
|
1554 | 19cb3738 | bellard | */
|
1555 | 19cb3738 | bellard | int bdrv_media_changed(BlockDriverState *bs)
|
1556 | 19cb3738 | bellard | { |
1557 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1558 | 19cb3738 | bellard | int ret;
|
1559 | 19cb3738 | bellard | |
1560 | 19cb3738 | bellard | if (!drv || !drv->bdrv_media_changed)
|
1561 | 19cb3738 | bellard | ret = -ENOTSUP; |
1562 | 19cb3738 | bellard | else
|
1563 | 19cb3738 | bellard | ret = drv->bdrv_media_changed(bs); |
1564 | 19cb3738 | bellard | if (ret == -ENOTSUP)
|
1565 | 19cb3738 | bellard | ret = bs->media_changed; |
1566 | 19cb3738 | bellard | bs->media_changed = 0;
|
1567 | 19cb3738 | bellard | return ret;
|
1568 | 19cb3738 | bellard | } |
1569 | 19cb3738 | bellard | |
1570 | 19cb3738 | bellard | /**
|
1571 | 19cb3738 | bellard | * If eject_flag is TRUE, eject the media. Otherwise, close the tray
|
1572 | 19cb3738 | bellard | */
|
1573 | aea2a33c | Mark McLoughlin | int bdrv_eject(BlockDriverState *bs, int eject_flag) |
1574 | 19cb3738 | bellard | { |
1575 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1576 | 19cb3738 | bellard | int ret;
|
1577 | 19cb3738 | bellard | |
1578 | aea2a33c | Mark McLoughlin | if (bs->locked) {
|
1579 | aea2a33c | Mark McLoughlin | return -EBUSY;
|
1580 | aea2a33c | Mark McLoughlin | } |
1581 | aea2a33c | Mark McLoughlin | |
1582 | 19cb3738 | bellard | if (!drv || !drv->bdrv_eject) {
|
1583 | 19cb3738 | bellard | ret = -ENOTSUP; |
1584 | 19cb3738 | bellard | } else {
|
1585 | 19cb3738 | bellard | ret = drv->bdrv_eject(bs, eject_flag); |
1586 | 19cb3738 | bellard | } |
1587 | 19cb3738 | bellard | if (ret == -ENOTSUP) {
|
1588 | 19cb3738 | bellard | if (eject_flag)
|
1589 | 19cb3738 | bellard | bdrv_close(bs); |
1590 | aea2a33c | Mark McLoughlin | ret = 0;
|
1591 | 19cb3738 | bellard | } |
1592 | aea2a33c | Mark McLoughlin | |
1593 | aea2a33c | Mark McLoughlin | return ret;
|
1594 | 19cb3738 | bellard | } |
1595 | 19cb3738 | bellard | |
1596 | 19cb3738 | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
1597 | 19cb3738 | bellard | { |
1598 | 19cb3738 | bellard | return bs->locked;
|
1599 | 19cb3738 | bellard | } |
1600 | 19cb3738 | bellard | |
1601 | 19cb3738 | bellard | /**
|
1602 | 19cb3738 | bellard | * Lock or unlock the media (if it is locked, the user won't be able
|
1603 | 19cb3738 | bellard | * to eject it manually).
|
1604 | 19cb3738 | bellard | */
|
1605 | 19cb3738 | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
1606 | 19cb3738 | bellard | { |
1607 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1608 | 19cb3738 | bellard | |
1609 | 19cb3738 | bellard | bs->locked = locked; |
1610 | 19cb3738 | bellard | if (drv && drv->bdrv_set_locked) {
|
1611 | 19cb3738 | bellard | drv->bdrv_set_locked(bs, locked); |
1612 | 19cb3738 | bellard | } |
1613 | 19cb3738 | bellard | } |
1614 | 985a03b0 | ths | |
1615 | 985a03b0 | ths | /* needed for generic scsi interface */
|
1616 | 985a03b0 | ths | |
1617 | 985a03b0 | ths | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1618 | 985a03b0 | ths | { |
1619 | 985a03b0 | ths | BlockDriver *drv = bs->drv; |
1620 | 985a03b0 | ths | |
1621 | 985a03b0 | ths | if (drv && drv->bdrv_ioctl)
|
1622 | 985a03b0 | ths | return drv->bdrv_ioctl(bs, req, buf);
|
1623 | 985a03b0 | ths | return -ENOTSUP;
|
1624 | 985a03b0 | ths | } |
1625 | 7d780669 | aliguori | |
1626 | 221f715d | aliguori | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
1627 | 221f715d | aliguori | unsigned long int req, void *buf, |
1628 | 221f715d | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1629 | 7d780669 | aliguori | { |
1630 | 221f715d | aliguori | BlockDriver *drv = bs->drv; |
1631 | 7d780669 | aliguori | |
1632 | 221f715d | aliguori | if (drv && drv->bdrv_aio_ioctl)
|
1633 | 221f715d | aliguori | return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque);
|
1634 | 221f715d | aliguori | return NULL; |
1635 | 7d780669 | aliguori | } |
1636 | e268ca52 | aliguori | |
1637 | e268ca52 | aliguori | void *qemu_blockalign(BlockDriverState *bs, size_t size)
|
1638 | e268ca52 | aliguori | { |
1639 | e268ca52 | aliguori | return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
1640 | e268ca52 | aliguori | } |