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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 | faf07963 | pbrook | #include "qemu-common.h" |
25 | 87ecb68b | pbrook | #ifndef QEMU_IMG
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26 | 87ecb68b | pbrook | #include "console.h" |
27 | faf07963 | pbrook | #endif
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28 | ea2384d3 | bellard | #include "block_int.h" |
29 | fc01f7e7 | bellard | |
30 | 7674e7bf | bellard | #ifdef _BSD
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31 | 7674e7bf | bellard | #include <sys/types.h> |
32 | 7674e7bf | bellard | #include <sys/stat.h> |
33 | 7674e7bf | bellard | #include <sys/ioctl.h> |
34 | 7674e7bf | bellard | #include <sys/queue.h> |
35 | 7674e7bf | bellard | #include <sys/disk.h> |
36 | 7674e7bf | bellard | #endif
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37 | 7674e7bf | bellard | |
38 | 83f64091 | bellard | #define SECTOR_BITS 9 |
39 | 83f64091 | bellard | #define SECTOR_SIZE (1 << SECTOR_BITS) |
40 | 83f64091 | bellard | |
41 | 90765429 | bellard | typedef struct BlockDriverAIOCBSync { |
42 | 90765429 | bellard | BlockDriverAIOCB common; |
43 | 90765429 | bellard | QEMUBH *bh; |
44 | 90765429 | bellard | int ret;
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45 | 90765429 | bellard | } BlockDriverAIOCBSync; |
46 | 90765429 | bellard | |
47 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
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48 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
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49 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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50 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
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51 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
52 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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53 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
54 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
55 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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56 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
57 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
58 | ec530c81 | bellard | |
59 | faf07963 | pbrook | BlockDriverState *bdrv_first; |
60 | ea2384d3 | bellard | static BlockDriver *first_drv;
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61 | ea2384d3 | bellard | |
62 | 83f64091 | bellard | int path_is_absolute(const char *path) |
63 | 3b0d4f61 | bellard | { |
64 | 83f64091 | bellard | const char *p; |
65 | 21664424 | bellard | #ifdef _WIN32
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66 | 21664424 | bellard | /* specific case for names like: "\\.\d:" */
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67 | 21664424 | bellard | if (*path == '/' || *path == '\\') |
68 | 21664424 | bellard | return 1; |
69 | 21664424 | bellard | #endif
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70 | 83f64091 | bellard | p = strchr(path, ':');
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71 | 83f64091 | bellard | if (p)
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72 | 83f64091 | bellard | p++; |
73 | 83f64091 | bellard | else
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74 | 83f64091 | bellard | p = path; |
75 | 3b9f94e1 | bellard | #ifdef _WIN32
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76 | 3b9f94e1 | bellard | return (*p == '/' || *p == '\\'); |
77 | 3b9f94e1 | bellard | #else
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78 | 3b9f94e1 | bellard | return (*p == '/'); |
79 | 3b9f94e1 | bellard | #endif
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80 | 3b0d4f61 | bellard | } |
81 | 3b0d4f61 | bellard | |
82 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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83 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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84 | 83f64091 | bellard | supported. */
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85 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
86 | 83f64091 | bellard | const char *base_path, |
87 | 83f64091 | bellard | const char *filename) |
88 | 3b0d4f61 | bellard | { |
89 | 83f64091 | bellard | const char *p, *p1; |
90 | 83f64091 | bellard | int len;
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91 | 83f64091 | bellard | |
92 | 83f64091 | bellard | if (dest_size <= 0) |
93 | 83f64091 | bellard | return;
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94 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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95 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
96 | 83f64091 | bellard | } else {
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97 | 83f64091 | bellard | p = strchr(base_path, ':');
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98 | 83f64091 | bellard | if (p)
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99 | 83f64091 | bellard | p++; |
100 | 83f64091 | bellard | else
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101 | 83f64091 | bellard | p = base_path; |
102 | 3b9f94e1 | bellard | p1 = strrchr(base_path, '/');
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103 | 3b9f94e1 | bellard | #ifdef _WIN32
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104 | 3b9f94e1 | bellard | { |
105 | 3b9f94e1 | bellard | const char *p2; |
106 | 3b9f94e1 | bellard | p2 = strrchr(base_path, '\\');
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107 | 3b9f94e1 | bellard | if (!p1 || p2 > p1)
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108 | 3b9f94e1 | bellard | p1 = p2; |
109 | 3b9f94e1 | bellard | } |
110 | 3b9f94e1 | bellard | #endif
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111 | 83f64091 | bellard | if (p1)
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112 | 83f64091 | bellard | p1++; |
113 | 83f64091 | bellard | else
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114 | 83f64091 | bellard | p1 = base_path; |
115 | 83f64091 | bellard | if (p1 > p)
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116 | 83f64091 | bellard | p = p1; |
117 | 83f64091 | bellard | len = p - base_path; |
118 | 83f64091 | bellard | if (len > dest_size - 1) |
119 | 83f64091 | bellard | len = dest_size - 1;
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120 | 83f64091 | bellard | memcpy(dest, base_path, len); |
121 | 83f64091 | bellard | dest[len] = '\0';
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122 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
123 | 3b0d4f61 | bellard | } |
124 | 3b0d4f61 | bellard | } |
125 | 3b0d4f61 | bellard | |
126 | 3b0d4f61 | bellard | |
127 | ea2384d3 | bellard | void bdrv_register(BlockDriver *bdrv)
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128 | ea2384d3 | bellard | { |
129 | ce1a14dc | pbrook | if (!bdrv->bdrv_aio_read) {
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130 | 83f64091 | bellard | /* add AIO emulation layer */
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131 | 83f64091 | bellard | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
132 | 83f64091 | bellard | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
133 | 83f64091 | bellard | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
134 | 90765429 | bellard | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync);
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135 | 83f64091 | bellard | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
136 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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137 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
138 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
139 | 83f64091 | bellard | } |
140 | ea2384d3 | bellard | bdrv->next = first_drv; |
141 | ea2384d3 | bellard | first_drv = bdrv; |
142 | ea2384d3 | bellard | } |
143 | b338082b | bellard | |
144 | b338082b | bellard | /* create a new block device (by default it is empty) */
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145 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
146 | b338082b | bellard | { |
147 | b338082b | bellard | BlockDriverState **pbs, *bs; |
148 | b338082b | bellard | |
149 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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150 | b338082b | bellard | if(!bs)
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151 | b338082b | bellard | return NULL; |
152 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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153 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
154 | ea2384d3 | bellard | /* insert at the end */
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155 | ea2384d3 | bellard | pbs = &bdrv_first; |
156 | ea2384d3 | bellard | while (*pbs != NULL) |
157 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
158 | ea2384d3 | bellard | *pbs = bs; |
159 | ea2384d3 | bellard | } |
160 | b338082b | bellard | return bs;
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161 | b338082b | bellard | } |
162 | b338082b | bellard | |
163 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
164 | ea2384d3 | bellard | { |
165 | ea2384d3 | bellard | BlockDriver *drv1; |
166 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
167 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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168 | ea2384d3 | bellard | return drv1;
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169 | ea2384d3 | bellard | } |
170 | ea2384d3 | bellard | return NULL; |
171 | ea2384d3 | bellard | } |
172 | ea2384d3 | bellard | |
173 | 5fafdf24 | ths | int bdrv_create(BlockDriver *drv,
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174 | ea2384d3 | bellard | const char *filename, int64_t size_in_sectors, |
175 | ea2384d3 | bellard | const char *backing_file, int flags) |
176 | ea2384d3 | bellard | { |
177 | ea2384d3 | bellard | if (!drv->bdrv_create)
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178 | ea2384d3 | bellard | return -ENOTSUP;
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179 | ea2384d3 | bellard | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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180 | ea2384d3 | bellard | } |
181 | ea2384d3 | bellard | |
182 | d5249393 | bellard | #ifdef _WIN32
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183 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
184 | d5249393 | bellard | { |
185 | 3b9f94e1 | bellard | char temp_dir[MAX_PATH];
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186 | 3b46e624 | ths | |
187 | 3b9f94e1 | bellard | GetTempPath(MAX_PATH, temp_dir); |
188 | 3b9f94e1 | bellard | GetTempFileName(temp_dir, "qem", 0, filename); |
189 | d5249393 | bellard | } |
190 | d5249393 | bellard | #else
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191 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
192 | fc01f7e7 | bellard | { |
193 | 67b915a5 | bellard | int fd;
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194 | d5249393 | bellard | /* XXX: race condition possible */
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195 | ea2384d3 | bellard | pstrcpy(filename, size, "/tmp/vl.XXXXXX");
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196 | ea2384d3 | bellard | fd = mkstemp(filename); |
197 | ea2384d3 | bellard | close(fd); |
198 | ea2384d3 | bellard | } |
199 | d5249393 | bellard | #endif
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200 | fc01f7e7 | bellard | |
201 | 19cb3738 | bellard | #ifdef _WIN32
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202 | f45512fe | bellard | static int is_windows_drive_prefix(const char *filename) |
203 | f45512fe | bellard | { |
204 | f45512fe | bellard | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
205 | f45512fe | bellard | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
206 | f45512fe | bellard | filename[1] == ':'); |
207 | f45512fe | bellard | } |
208 | 3b46e624 | ths | |
209 | 19cb3738 | bellard | static int is_windows_drive(const char *filename) |
210 | 19cb3738 | bellard | { |
211 | 5fafdf24 | ths | if (is_windows_drive_prefix(filename) &&
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212 | f45512fe | bellard | filename[2] == '\0') |
213 | 19cb3738 | bellard | return 1; |
214 | 19cb3738 | bellard | if (strstart(filename, "\\\\.\\", NULL) || |
215 | 19cb3738 | bellard | strstart(filename, "//./", NULL)) |
216 | 19cb3738 | bellard | return 1; |
217 | 19cb3738 | bellard | return 0; |
218 | 19cb3738 | bellard | } |
219 | 19cb3738 | bellard | #endif
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220 | 19cb3738 | bellard | |
221 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
222 | 83f64091 | bellard | { |
223 | 83f64091 | bellard | BlockDriver *drv1; |
224 | 83f64091 | bellard | char protocol[128]; |
225 | 83f64091 | bellard | int len;
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226 | 83f64091 | bellard | const char *p; |
227 | 19cb3738 | bellard | |
228 | 19cb3738 | bellard | #ifdef _WIN32
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229 | f45512fe | bellard | if (is_windows_drive(filename) ||
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230 | f45512fe | bellard | is_windows_drive_prefix(filename)) |
231 | 19cb3738 | bellard | return &bdrv_raw;
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232 | 19cb3738 | bellard | #endif
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233 | 83f64091 | bellard | p = strchr(filename, ':');
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234 | 83f64091 | bellard | if (!p)
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235 | 83f64091 | bellard | return &bdrv_raw;
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236 | 83f64091 | bellard | len = p - filename; |
237 | 83f64091 | bellard | if (len > sizeof(protocol) - 1) |
238 | 83f64091 | bellard | len = sizeof(protocol) - 1; |
239 | 83f64091 | bellard | memcpy(protocol, filename, len); |
240 | 83f64091 | bellard | protocol[len] = '\0';
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241 | 83f64091 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
242 | 5fafdf24 | ths | if (drv1->protocol_name &&
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243 | 83f64091 | bellard | !strcmp(drv1->protocol_name, protocol)) |
244 | 83f64091 | bellard | return drv1;
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245 | 83f64091 | bellard | } |
246 | 83f64091 | bellard | return NULL; |
247 | 83f64091 | bellard | } |
248 | 83f64091 | bellard | |
249 | 7674e7bf | bellard | /* XXX: force raw format if block or character device ? It would
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250 | 7674e7bf | bellard | simplify the BSD case */
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251 | ea2384d3 | bellard | static BlockDriver *find_image_format(const char *filename) |
252 | ea2384d3 | bellard | { |
253 | 83f64091 | bellard | int ret, score, score_max;
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254 | ea2384d3 | bellard | BlockDriver *drv1, *drv; |
255 | 83f64091 | bellard | uint8_t buf[2048];
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256 | 83f64091 | bellard | BlockDriverState *bs; |
257 | 3b46e624 | ths | |
258 | 19cb3738 | bellard | /* detect host devices. By convention, /dev/cdrom[N] is always
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259 | 19cb3738 | bellard | recognized as a host CDROM */
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260 | 19cb3738 | bellard | if (strstart(filename, "/dev/cdrom", NULL)) |
261 | 19cb3738 | bellard | return &bdrv_host_device;
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262 | 19cb3738 | bellard | #ifdef _WIN32
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263 | 19cb3738 | bellard | if (is_windows_drive(filename))
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264 | 19cb3738 | bellard | return &bdrv_host_device;
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265 | 19cb3738 | bellard | #else
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266 | 19cb3738 | bellard | { |
267 | 19cb3738 | bellard | struct stat st;
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268 | 5fafdf24 | ths | if (stat(filename, &st) >= 0 && |
269 | 19cb3738 | bellard | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
270 | 19cb3738 | bellard | return &bdrv_host_device;
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271 | 19cb3738 | bellard | } |
272 | 19cb3738 | bellard | } |
273 | 19cb3738 | bellard | #endif
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274 | 3b46e624 | ths | |
275 | 83f64091 | bellard | drv = find_protocol(filename); |
276 | 19cb3738 | bellard | /* no need to test disk image formats for vvfat */
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277 | 83f64091 | bellard | if (drv == &bdrv_vvfat)
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278 | 83f64091 | bellard | return drv;
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279 | 19cb3738 | bellard | |
280 | 83f64091 | bellard | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
281 | 83f64091 | bellard | if (ret < 0) |
282 | 83f64091 | bellard | return NULL; |
283 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
284 | 83f64091 | bellard | bdrv_delete(bs); |
285 | 83f64091 | bellard | if (ret < 0) { |
286 | 83f64091 | bellard | return NULL; |
287 | 83f64091 | bellard | } |
288 | 83f64091 | bellard | |
289 | ea2384d3 | bellard | score_max = 0;
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290 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
291 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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292 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
293 | 83f64091 | bellard | if (score > score_max) {
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294 | 83f64091 | bellard | score_max = score; |
295 | 83f64091 | bellard | drv = drv1; |
296 | 83f64091 | bellard | } |
297 | 0849bf08 | bellard | } |
298 | fc01f7e7 | bellard | } |
299 | ea2384d3 | bellard | return drv;
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300 | ea2384d3 | bellard | } |
301 | ea2384d3 | bellard | |
302 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
303 | ea2384d3 | bellard | { |
304 | 83f64091 | bellard | BlockDriverState *bs; |
305 | 83f64091 | bellard | int ret;
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306 | 83f64091 | bellard | |
307 | 83f64091 | bellard | bs = bdrv_new("");
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308 | 83f64091 | bellard | if (!bs)
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309 | 83f64091 | bellard | return -ENOMEM;
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310 | 83f64091 | bellard | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
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311 | 83f64091 | bellard | if (ret < 0) { |
312 | 83f64091 | bellard | bdrv_delete(bs); |
313 | 83f64091 | bellard | return ret;
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314 | 3b0d4f61 | bellard | } |
315 | 83f64091 | bellard | *pbs = bs; |
316 | 83f64091 | bellard | return 0; |
317 | 83f64091 | bellard | } |
318 | 83f64091 | bellard | |
319 | 83f64091 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
320 | 83f64091 | bellard | { |
321 | 83f64091 | bellard | return bdrv_open2(bs, filename, flags, NULL); |
322 | ea2384d3 | bellard | } |
323 | ea2384d3 | bellard | |
324 | 83f64091 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
325 | ea2384d3 | bellard | BlockDriver *drv) |
326 | ea2384d3 | bellard | { |
327 | 83f64091 | bellard | int ret, open_flags;
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328 | eb5c851f | ths | char tmp_filename[PATH_MAX];
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329 | eb5c851f | ths | char backing_filename[PATH_MAX];
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330 | 3b46e624 | ths | |
331 | ea2384d3 | bellard | bs->read_only = 0;
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332 | ea2384d3 | bellard | bs->is_temporary = 0;
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333 | ea2384d3 | bellard | bs->encrypted = 0;
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334 | 712e7874 | bellard | |
335 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
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336 | ea2384d3 | bellard | BlockDriverState *bs1; |
337 | ea2384d3 | bellard | int64_t total_size; |
338 | 3b46e624 | ths | |
339 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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340 | ea2384d3 | bellard | instead of opening 'filename' directly */
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341 | 33e3963e | bellard | |
342 | ea2384d3 | bellard | /* if there is a backing file, use it */
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343 | ea2384d3 | bellard | bs1 = bdrv_new("");
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344 | ea2384d3 | bellard | if (!bs1) {
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345 | 83f64091 | bellard | return -ENOMEM;
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346 | ea2384d3 | bellard | } |
347 | ea2384d3 | bellard | if (bdrv_open(bs1, filename, 0) < 0) { |
348 | ea2384d3 | bellard | bdrv_delete(bs1); |
349 | ea2384d3 | bellard | return -1; |
350 | ea2384d3 | bellard | } |
351 | 83f64091 | bellard | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
352 | ea2384d3 | bellard | bdrv_delete(bs1); |
353 | 3b46e624 | ths | |
354 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
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355 | a817d936 | bellard | realpath(filename, backing_filename); |
356 | 5fafdf24 | ths | if (bdrv_create(&bdrv_qcow2, tmp_filename,
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357 | a817d936 | bellard | total_size, backing_filename, 0) < 0) { |
358 | ea2384d3 | bellard | return -1; |
359 | ea2384d3 | bellard | } |
360 | ea2384d3 | bellard | filename = tmp_filename; |
361 | ea2384d3 | bellard | bs->is_temporary = 1;
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362 | ea2384d3 | bellard | } |
363 | 712e7874 | bellard | |
364 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
365 | 83f64091 | bellard | if (flags & BDRV_O_FILE) {
|
366 | 83f64091 | bellard | drv = find_protocol(filename); |
367 | ea2384d3 | bellard | if (!drv)
|
368 | 83f64091 | bellard | return -ENOENT;
|
369 | 83f64091 | bellard | } else {
|
370 | 83f64091 | bellard | if (!drv) {
|
371 | 83f64091 | bellard | drv = find_image_format(filename); |
372 | 83f64091 | bellard | if (!drv)
|
373 | 83f64091 | bellard | return -1; |
374 | 83f64091 | bellard | } |
375 | ea2384d3 | bellard | } |
376 | ea2384d3 | bellard | bs->drv = drv; |
377 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
378 | ea2384d3 | bellard | if (bs->opaque == NULL && drv->instance_size > 0) |
379 | ea2384d3 | bellard | return -1; |
380 | 83f64091 | bellard | /* Note: for compatibility, we open disk image files as RDWR, and
|
381 | 83f64091 | bellard | RDONLY as fallback */
|
382 | 83f64091 | bellard | if (!(flags & BDRV_O_FILE))
|
383 | 83f64091 | bellard | open_flags = BDRV_O_RDWR; |
384 | 83f64091 | bellard | else
|
385 | 83f64091 | bellard | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
386 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, open_flags); |
387 | 83f64091 | bellard | if (ret == -EACCES && !(flags & BDRV_O_FILE)) {
|
388 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY); |
389 | 83f64091 | bellard | bs->read_only = 1;
|
390 | 83f64091 | bellard | } |
391 | ea2384d3 | bellard | if (ret < 0) { |
392 | ea2384d3 | bellard | qemu_free(bs->opaque); |
393 | 6b21b973 | bellard | bs->opaque = NULL;
|
394 | 6b21b973 | bellard | bs->drv = NULL;
|
395 | 83f64091 | bellard | return ret;
|
396 | 33e3963e | bellard | } |
397 | d15a771d | bellard | if (drv->bdrv_getlength) {
|
398 | d15a771d | bellard | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
399 | d15a771d | bellard | } |
400 | 67b915a5 | bellard | #ifndef _WIN32
|
401 | ea2384d3 | bellard | if (bs->is_temporary) {
|
402 | ea2384d3 | bellard | unlink(filename); |
403 | ea2384d3 | bellard | } |
404 | ea2384d3 | bellard | #endif
|
405 | 83f64091 | bellard | if (bs->backing_file[0] != '\0') { |
406 | ea2384d3 | bellard | /* if there is a backing file, use it */
|
407 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
|
408 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
409 | ea2384d3 | bellard | fail:
|
410 | ea2384d3 | bellard | bdrv_close(bs); |
411 | 6b21b973 | bellard | return -ENOMEM;
|
412 | 33e3963e | bellard | } |
413 | 83f64091 | bellard | path_combine(backing_filename, sizeof(backing_filename),
|
414 | 83f64091 | bellard | filename, bs->backing_file); |
415 | 83f64091 | bellard | if (bdrv_open(bs->backing_hd, backing_filename, 0) < 0) |
416 | 33e3963e | bellard | goto fail;
|
417 | 33e3963e | bellard | } |
418 | 33e3963e | bellard | |
419 | b338082b | bellard | /* call the change callback */
|
420 | 19cb3738 | bellard | bs->media_changed = 1;
|
421 | b338082b | bellard | if (bs->change_cb)
|
422 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
423 | b338082b | bellard | |
424 | b338082b | bellard | return 0; |
425 | fc01f7e7 | bellard | } |
426 | fc01f7e7 | bellard | |
427 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
428 | fc01f7e7 | bellard | { |
429 | 19cb3738 | bellard | if (bs->drv) {
|
430 | ea2384d3 | bellard | if (bs->backing_hd)
|
431 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
432 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
433 | ea2384d3 | bellard | qemu_free(bs->opaque); |
434 | ea2384d3 | bellard | #ifdef _WIN32
|
435 | ea2384d3 | bellard | if (bs->is_temporary) {
|
436 | ea2384d3 | bellard | unlink(bs->filename); |
437 | ea2384d3 | bellard | } |
438 | 67b915a5 | bellard | #endif
|
439 | ea2384d3 | bellard | bs->opaque = NULL;
|
440 | ea2384d3 | bellard | bs->drv = NULL;
|
441 | b338082b | bellard | |
442 | b338082b | bellard | /* call the change callback */
|
443 | 19cb3738 | bellard | bs->media_changed = 1;
|
444 | b338082b | bellard | if (bs->change_cb)
|
445 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
446 | b338082b | bellard | } |
447 | b338082b | bellard | } |
448 | b338082b | bellard | |
449 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
450 | b338082b | bellard | { |
451 | ea2384d3 | bellard | /* XXX: remove the driver list */
|
452 | b338082b | bellard | bdrv_close(bs); |
453 | b338082b | bellard | qemu_free(bs); |
454 | fc01f7e7 | bellard | } |
455 | fc01f7e7 | bellard | |
456 | 33e3963e | bellard | /* commit COW file into the raw image */
|
457 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
458 | 33e3963e | bellard | { |
459 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
460 | 83f64091 | bellard | int64_t i, total_sectors; |
461 | ea2384d3 | bellard | int n, j;
|
462 | ea2384d3 | bellard | unsigned char sector[512]; |
463 | 33e3963e | bellard | |
464 | 19cb3738 | bellard | if (!drv)
|
465 | 19cb3738 | bellard | return -ENOMEDIUM;
|
466 | 33e3963e | bellard | |
467 | 33e3963e | bellard | if (bs->read_only) {
|
468 | ea2384d3 | bellard | return -EACCES;
|
469 | 33e3963e | bellard | } |
470 | 33e3963e | bellard | |
471 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
472 | ea2384d3 | bellard | return -ENOTSUP;
|
473 | ea2384d3 | bellard | } |
474 | 33e3963e | bellard | |
475 | 83f64091 | bellard | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
476 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
477 | 19cb3738 | bellard | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
478 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
479 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
480 | ea2384d3 | bellard | return -EIO;
|
481 | ea2384d3 | bellard | } |
482 | ea2384d3 | bellard | |
483 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
484 | ea2384d3 | bellard | return -EIO;
|
485 | ea2384d3 | bellard | } |
486 | ea2384d3 | bellard | i++; |
487 | 33e3963e | bellard | } |
488 | ea2384d3 | bellard | } else {
|
489 | ea2384d3 | bellard | i += n; |
490 | ea2384d3 | bellard | } |
491 | 33e3963e | bellard | } |
492 | 95389c86 | bellard | |
493 | 19cb3738 | bellard | if (drv->bdrv_make_empty)
|
494 | 19cb3738 | bellard | return drv->bdrv_make_empty(bs);
|
495 | 95389c86 | bellard | |
496 | 33e3963e | bellard | return 0; |
497 | 33e3963e | bellard | } |
498 | 33e3963e | bellard | |
499 | 19cb3738 | bellard | /* return < 0 if error. See bdrv_write() for the return codes */
|
500 | 5fafdf24 | ths | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
501 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
502 | fc01f7e7 | bellard | { |
503 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
504 | ea2384d3 | bellard | |
505 | 19cb3738 | bellard | if (!drv)
|
506 | 19cb3738 | bellard | return -ENOMEDIUM;
|
507 | b338082b | bellard | |
508 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
509 | cf98951b | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
510 | 83f64091 | bellard | sector_num++; |
511 | 83f64091 | bellard | nb_sectors--; |
512 | 83f64091 | bellard | buf += 512;
|
513 | 83f64091 | bellard | if (nb_sectors == 0) |
514 | 83f64091 | bellard | return 0; |
515 | 83f64091 | bellard | } |
516 | 83f64091 | bellard | if (drv->bdrv_pread) {
|
517 | 83f64091 | bellard | int ret, len;
|
518 | 83f64091 | bellard | len = nb_sectors * 512;
|
519 | 83f64091 | bellard | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len);
|
520 | 83f64091 | bellard | if (ret < 0) |
521 | 83f64091 | bellard | return ret;
|
522 | 83f64091 | bellard | else if (ret != len) |
523 | 19cb3738 | bellard | return -EINVAL;
|
524 | 83f64091 | bellard | else
|
525 | 83f64091 | bellard | return 0; |
526 | 83f64091 | bellard | } else {
|
527 | 83f64091 | bellard | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
528 | 33e3963e | bellard | } |
529 | fc01f7e7 | bellard | } |
530 | fc01f7e7 | bellard | |
531 | 5fafdf24 | ths | /* Return < 0 if error. Important errors are:
|
532 | 19cb3738 | bellard | -EIO generic I/O error (may happen for all errors)
|
533 | 19cb3738 | bellard | -ENOMEDIUM No media inserted.
|
534 | 19cb3738 | bellard | -EINVAL Invalid sector number or nb_sectors
|
535 | 19cb3738 | bellard | -EACCES Trying to write a read-only device
|
536 | 19cb3738 | bellard | */
|
537 | 5fafdf24 | ths | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
538 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
539 | fc01f7e7 | bellard | { |
540 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
541 | 19cb3738 | bellard | if (!bs->drv)
|
542 | 19cb3738 | bellard | return -ENOMEDIUM;
|
543 | 0849bf08 | bellard | if (bs->read_only)
|
544 | 19cb3738 | bellard | return -EACCES;
|
545 | 79639d42 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
546 | 3b46e624 | ths | memcpy(bs->boot_sector_data, buf, 512);
|
547 | 79639d42 | bellard | } |
548 | 83f64091 | bellard | if (drv->bdrv_pwrite) {
|
549 | 83f64091 | bellard | int ret, len;
|
550 | 83f64091 | bellard | len = nb_sectors * 512;
|
551 | 83f64091 | bellard | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len);
|
552 | 83f64091 | bellard | if (ret < 0) |
553 | 83f64091 | bellard | return ret;
|
554 | 83f64091 | bellard | else if (ret != len) |
555 | 83f64091 | bellard | return -EIO;
|
556 | 83f64091 | bellard | else
|
557 | 83f64091 | bellard | return 0; |
558 | 83f64091 | bellard | } else {
|
559 | 83f64091 | bellard | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
560 | 83f64091 | bellard | } |
561 | 83f64091 | bellard | } |
562 | 83f64091 | bellard | |
563 | 5fafdf24 | ths | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
564 | faea38e7 | bellard | uint8_t *buf, int count1)
|
565 | 83f64091 | bellard | { |
566 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
567 | 83f64091 | bellard | int len, nb_sectors, count;
|
568 | 83f64091 | bellard | int64_t sector_num; |
569 | 83f64091 | bellard | |
570 | 83f64091 | bellard | count = count1; |
571 | 83f64091 | bellard | /* first read to align to sector start */
|
572 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
573 | 83f64091 | bellard | if (len > count)
|
574 | 83f64091 | bellard | len = count; |
575 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
576 | 83f64091 | bellard | if (len > 0) { |
577 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
578 | 83f64091 | bellard | return -EIO;
|
579 | 83f64091 | bellard | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
|
580 | 83f64091 | bellard | count -= len; |
581 | 83f64091 | bellard | if (count == 0) |
582 | 83f64091 | bellard | return count1;
|
583 | 83f64091 | bellard | sector_num++; |
584 | 83f64091 | bellard | buf += len; |
585 | 83f64091 | bellard | } |
586 | 83f64091 | bellard | |
587 | 83f64091 | bellard | /* read the sectors "in place" */
|
588 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
589 | 83f64091 | bellard | if (nb_sectors > 0) { |
590 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
591 | 83f64091 | bellard | return -EIO;
|
592 | 83f64091 | bellard | sector_num += nb_sectors; |
593 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
594 | 83f64091 | bellard | buf += len; |
595 | 83f64091 | bellard | count -= len; |
596 | 83f64091 | bellard | } |
597 | 83f64091 | bellard | |
598 | 83f64091 | bellard | /* add data from the last sector */
|
599 | 83f64091 | bellard | if (count > 0) { |
600 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
601 | 83f64091 | bellard | return -EIO;
|
602 | 83f64091 | bellard | memcpy(buf, tmp_buf, count); |
603 | 83f64091 | bellard | } |
604 | 83f64091 | bellard | return count1;
|
605 | 83f64091 | bellard | } |
606 | 83f64091 | bellard | |
607 | 5fafdf24 | ths | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
608 | faea38e7 | bellard | const uint8_t *buf, int count1) |
609 | 83f64091 | bellard | { |
610 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
611 | 83f64091 | bellard | int len, nb_sectors, count;
|
612 | 83f64091 | bellard | int64_t sector_num; |
613 | 83f64091 | bellard | |
614 | 83f64091 | bellard | count = count1; |
615 | 83f64091 | bellard | /* first write to align to sector start */
|
616 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
617 | 83f64091 | bellard | if (len > count)
|
618 | 83f64091 | bellard | len = count; |
619 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
620 | 83f64091 | bellard | if (len > 0) { |
621 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
622 | 83f64091 | bellard | return -EIO;
|
623 | 83f64091 | bellard | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len);
|
624 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
625 | 83f64091 | bellard | return -EIO;
|
626 | 83f64091 | bellard | count -= len; |
627 | 83f64091 | bellard | if (count == 0) |
628 | 83f64091 | bellard | return count1;
|
629 | 83f64091 | bellard | sector_num++; |
630 | 83f64091 | bellard | buf += len; |
631 | 83f64091 | bellard | } |
632 | 83f64091 | bellard | |
633 | 83f64091 | bellard | /* write the sectors "in place" */
|
634 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
635 | 83f64091 | bellard | if (nb_sectors > 0) { |
636 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
637 | 83f64091 | bellard | return -EIO;
|
638 | 83f64091 | bellard | sector_num += nb_sectors; |
639 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
640 | 83f64091 | bellard | buf += len; |
641 | 83f64091 | bellard | count -= len; |
642 | 83f64091 | bellard | } |
643 | 83f64091 | bellard | |
644 | 83f64091 | bellard | /* add data from the last sector */
|
645 | 83f64091 | bellard | if (count > 0) { |
646 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
647 | 83f64091 | bellard | return -EIO;
|
648 | 83f64091 | bellard | memcpy(tmp_buf, buf, count); |
649 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
650 | 83f64091 | bellard | return -EIO;
|
651 | 83f64091 | bellard | } |
652 | 83f64091 | bellard | return count1;
|
653 | 83f64091 | bellard | } |
654 | 83f64091 | bellard | |
655 | 83f64091 | bellard | /**
|
656 | 5fafdf24 | ths | * Read with byte offsets (needed only for file protocols)
|
657 | 83f64091 | bellard | */
|
658 | 5fafdf24 | ths | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
659 | 83f64091 | bellard | void *buf1, int count1) |
660 | 83f64091 | bellard | { |
661 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
662 | 83f64091 | bellard | |
663 | 83f64091 | bellard | if (!drv)
|
664 | 19cb3738 | bellard | return -ENOMEDIUM;
|
665 | 83f64091 | bellard | if (!drv->bdrv_pread)
|
666 | faea38e7 | bellard | return bdrv_pread_em(bs, offset, buf1, count1);
|
667 | 83f64091 | bellard | return drv->bdrv_pread(bs, offset, buf1, count1);
|
668 | 83f64091 | bellard | } |
669 | 83f64091 | bellard | |
670 | 5fafdf24 | ths | /**
|
671 | 5fafdf24 | ths | * Write with byte offsets (needed only for file protocols)
|
672 | 83f64091 | bellard | */
|
673 | 5fafdf24 | ths | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
674 | 83f64091 | bellard | const void *buf1, int count1) |
675 | 83f64091 | bellard | { |
676 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
677 | 83f64091 | bellard | |
678 | 83f64091 | bellard | if (!drv)
|
679 | 19cb3738 | bellard | return -ENOMEDIUM;
|
680 | 83f64091 | bellard | if (!drv->bdrv_pwrite)
|
681 | faea38e7 | bellard | return bdrv_pwrite_em(bs, offset, buf1, count1);
|
682 | 83f64091 | bellard | return drv->bdrv_pwrite(bs, offset, buf1, count1);
|
683 | 83f64091 | bellard | } |
684 | 83f64091 | bellard | |
685 | 83f64091 | bellard | /**
|
686 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
687 | 83f64091 | bellard | */
|
688 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
689 | 83f64091 | bellard | { |
690 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
691 | 83f64091 | bellard | if (!drv)
|
692 | 19cb3738 | bellard | return -ENOMEDIUM;
|
693 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
694 | 83f64091 | bellard | return -ENOTSUP;
|
695 | 83f64091 | bellard | return drv->bdrv_truncate(bs, offset);
|
696 | 83f64091 | bellard | } |
697 | 83f64091 | bellard | |
698 | 83f64091 | bellard | /**
|
699 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
700 | 83f64091 | bellard | */
|
701 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
702 | 83f64091 | bellard | { |
703 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
704 | 83f64091 | bellard | if (!drv)
|
705 | 19cb3738 | bellard | return -ENOMEDIUM;
|
706 | 83f64091 | bellard | if (!drv->bdrv_getlength) {
|
707 | 83f64091 | bellard | /* legacy mode */
|
708 | 83f64091 | bellard | return bs->total_sectors * SECTOR_SIZE;
|
709 | 83f64091 | bellard | } |
710 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
711 | fc01f7e7 | bellard | } |
712 | fc01f7e7 | bellard | |
713 | 19cb3738 | bellard | /* return 0 as number of sectors if no device present or error */
|
714 | fc01f7e7 | bellard | void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
|
715 | fc01f7e7 | bellard | { |
716 | 19cb3738 | bellard | int64_t length; |
717 | 19cb3738 | bellard | length = bdrv_getlength(bs); |
718 | 19cb3738 | bellard | if (length < 0) |
719 | 19cb3738 | bellard | length = 0;
|
720 | 19cb3738 | bellard | else
|
721 | 19cb3738 | bellard | length = length >> SECTOR_BITS; |
722 | 19cb3738 | bellard | *nb_sectors_ptr = length; |
723 | fc01f7e7 | bellard | } |
724 | cf98951b | bellard | |
725 | cf98951b | bellard | /* force a given boot sector. */
|
726 | cf98951b | bellard | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
727 | cf98951b | bellard | { |
728 | cf98951b | bellard | bs->boot_sector_enabled = 1;
|
729 | cf98951b | bellard | if (size > 512) |
730 | cf98951b | bellard | size = 512;
|
731 | cf98951b | bellard | memcpy(bs->boot_sector_data, data, size); |
732 | cf98951b | bellard | memset(bs->boot_sector_data + size, 0, 512 - size); |
733 | cf98951b | bellard | } |
734 | b338082b | bellard | |
735 | 5fafdf24 | ths | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
736 | b338082b | bellard | int cyls, int heads, int secs) |
737 | b338082b | bellard | { |
738 | b338082b | bellard | bs->cyls = cyls; |
739 | b338082b | bellard | bs->heads = heads; |
740 | b338082b | bellard | bs->secs = secs; |
741 | b338082b | bellard | } |
742 | b338082b | bellard | |
743 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
744 | b338082b | bellard | { |
745 | b338082b | bellard | bs->type = type; |
746 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
747 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
748 | b338082b | bellard | } |
749 | b338082b | bellard | |
750 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
751 | 46d4767d | bellard | { |
752 | 46d4767d | bellard | bs->translation = translation; |
753 | 46d4767d | bellard | } |
754 | 46d4767d | bellard | |
755 | 5fafdf24 | ths | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
756 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
757 | b338082b | bellard | { |
758 | b338082b | bellard | *pcyls = bs->cyls; |
759 | b338082b | bellard | *pheads = bs->heads; |
760 | b338082b | bellard | *psecs = bs->secs; |
761 | b338082b | bellard | } |
762 | b338082b | bellard | |
763 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
764 | b338082b | bellard | { |
765 | b338082b | bellard | return bs->type;
|
766 | b338082b | bellard | } |
767 | b338082b | bellard | |
768 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
769 | 46d4767d | bellard | { |
770 | 46d4767d | bellard | return bs->translation;
|
771 | 46d4767d | bellard | } |
772 | 46d4767d | bellard | |
773 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
774 | b338082b | bellard | { |
775 | b338082b | bellard | return bs->removable;
|
776 | b338082b | bellard | } |
777 | b338082b | bellard | |
778 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
779 | b338082b | bellard | { |
780 | b338082b | bellard | return bs->read_only;
|
781 | b338082b | bellard | } |
782 | b338082b | bellard | |
783 | 19cb3738 | bellard | /* XXX: no longer used */
|
784 | 5fafdf24 | ths | void bdrv_set_change_cb(BlockDriverState *bs,
|
785 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
786 | b338082b | bellard | { |
787 | b338082b | bellard | bs->change_cb = change_cb; |
788 | b338082b | bellard | bs->change_opaque = opaque; |
789 | b338082b | bellard | } |
790 | b338082b | bellard | |
791 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
792 | ea2384d3 | bellard | { |
793 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
794 | ea2384d3 | bellard | return 1; |
795 | ea2384d3 | bellard | return bs->encrypted;
|
796 | ea2384d3 | bellard | } |
797 | ea2384d3 | bellard | |
798 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
799 | ea2384d3 | bellard | { |
800 | ea2384d3 | bellard | int ret;
|
801 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
802 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
803 | ea2384d3 | bellard | if (ret < 0) |
804 | ea2384d3 | bellard | return ret;
|
805 | ea2384d3 | bellard | if (!bs->encrypted)
|
806 | ea2384d3 | bellard | return 0; |
807 | ea2384d3 | bellard | } |
808 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
809 | ea2384d3 | bellard | return -1; |
810 | ea2384d3 | bellard | return bs->drv->bdrv_set_key(bs, key);
|
811 | ea2384d3 | bellard | } |
812 | ea2384d3 | bellard | |
813 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
814 | ea2384d3 | bellard | { |
815 | 19cb3738 | bellard | if (!bs->drv) {
|
816 | ea2384d3 | bellard | buf[0] = '\0'; |
817 | ea2384d3 | bellard | } else {
|
818 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
819 | ea2384d3 | bellard | } |
820 | ea2384d3 | bellard | } |
821 | ea2384d3 | bellard | |
822 | 5fafdf24 | ths | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
823 | ea2384d3 | bellard | void *opaque)
|
824 | ea2384d3 | bellard | { |
825 | ea2384d3 | bellard | BlockDriver *drv; |
826 | ea2384d3 | bellard | |
827 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
828 | ea2384d3 | bellard | it(opaque, drv->format_name); |
829 | ea2384d3 | bellard | } |
830 | ea2384d3 | bellard | } |
831 | ea2384d3 | bellard | |
832 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
833 | b338082b | bellard | { |
834 | b338082b | bellard | BlockDriverState *bs; |
835 | b338082b | bellard | |
836 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
837 | b338082b | bellard | if (!strcmp(name, bs->device_name))
|
838 | b338082b | bellard | return bs;
|
839 | b338082b | bellard | } |
840 | b338082b | bellard | return NULL; |
841 | b338082b | bellard | } |
842 | b338082b | bellard | |
843 | 81d0912d | bellard | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
844 | 81d0912d | bellard | { |
845 | 81d0912d | bellard | BlockDriverState *bs; |
846 | 81d0912d | bellard | |
847 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
848 | 81d0912d | bellard | it(opaque, bs->device_name); |
849 | 81d0912d | bellard | } |
850 | 81d0912d | bellard | } |
851 | 81d0912d | bellard | |
852 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
853 | ea2384d3 | bellard | { |
854 | ea2384d3 | bellard | return bs->device_name;
|
855 | ea2384d3 | bellard | } |
856 | ea2384d3 | bellard | |
857 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
858 | 7a6cba61 | pbrook | { |
859 | 7a6cba61 | pbrook | if (bs->drv->bdrv_flush)
|
860 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
861 | 7a6cba61 | pbrook | if (bs->backing_hd)
|
862 | 7a6cba61 | pbrook | bdrv_flush(bs->backing_hd); |
863 | 7a6cba61 | pbrook | } |
864 | 7a6cba61 | pbrook | |
865 | faf07963 | pbrook | #ifndef QEMU_IMG
|
866 | b338082b | bellard | void bdrv_info(void) |
867 | b338082b | bellard | { |
868 | b338082b | bellard | BlockDriverState *bs; |
869 | b338082b | bellard | |
870 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
871 | b338082b | bellard | term_printf("%s:", bs->device_name);
|
872 | b338082b | bellard | term_printf(" type=");
|
873 | b338082b | bellard | switch(bs->type) {
|
874 | b338082b | bellard | case BDRV_TYPE_HD:
|
875 | b338082b | bellard | term_printf("hd");
|
876 | b338082b | bellard | break;
|
877 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
878 | b338082b | bellard | term_printf("cdrom");
|
879 | b338082b | bellard | break;
|
880 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
881 | b338082b | bellard | term_printf("floppy");
|
882 | b338082b | bellard | break;
|
883 | b338082b | bellard | } |
884 | b338082b | bellard | term_printf(" removable=%d", bs->removable);
|
885 | b338082b | bellard | if (bs->removable) {
|
886 | b338082b | bellard | term_printf(" locked=%d", bs->locked);
|
887 | b338082b | bellard | } |
888 | 19cb3738 | bellard | if (bs->drv) {
|
889 | fef30743 | ths | term_printf(" file=");
|
890 | fef30743 | ths | term_print_filename(bs->filename); |
891 | fef30743 | ths | if (bs->backing_file[0] != '\0') { |
892 | fef30743 | ths | term_printf(" backing_file=");
|
893 | fef30743 | ths | term_print_filename(bs->backing_file); |
894 | fef30743 | ths | } |
895 | b338082b | bellard | term_printf(" ro=%d", bs->read_only);
|
896 | ea2384d3 | bellard | term_printf(" drv=%s", bs->drv->format_name);
|
897 | ea2384d3 | bellard | if (bs->encrypted)
|
898 | ea2384d3 | bellard | term_printf(" encrypted");
|
899 | b338082b | bellard | } else {
|
900 | b338082b | bellard | term_printf(" [not inserted]");
|
901 | b338082b | bellard | } |
902 | b338082b | bellard | term_printf("\n");
|
903 | b338082b | bellard | } |
904 | b338082b | bellard | } |
905 | faf07963 | pbrook | #endif
|
906 | ea2384d3 | bellard | |
907 | 5fafdf24 | ths | void bdrv_get_backing_filename(BlockDriverState *bs,
|
908 | 83f64091 | bellard | char *filename, int filename_size) |
909 | 83f64091 | bellard | { |
910 | 83f64091 | bellard | if (!bs->backing_hd) {
|
911 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
912 | 83f64091 | bellard | } else {
|
913 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
914 | 83f64091 | bellard | } |
915 | 83f64091 | bellard | } |
916 | 83f64091 | bellard | |
917 | 5fafdf24 | ths | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
918 | faea38e7 | bellard | const uint8_t *buf, int nb_sectors) |
919 | faea38e7 | bellard | { |
920 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
921 | faea38e7 | bellard | if (!drv)
|
922 | 19cb3738 | bellard | return -ENOMEDIUM;
|
923 | faea38e7 | bellard | if (!drv->bdrv_write_compressed)
|
924 | faea38e7 | bellard | return -ENOTSUP;
|
925 | faea38e7 | bellard | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
|
926 | faea38e7 | bellard | } |
927 | 3b46e624 | ths | |
928 | faea38e7 | bellard | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
929 | faea38e7 | bellard | { |
930 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
931 | faea38e7 | bellard | if (!drv)
|
932 | 19cb3738 | bellard | return -ENOMEDIUM;
|
933 | faea38e7 | bellard | if (!drv->bdrv_get_info)
|
934 | faea38e7 | bellard | return -ENOTSUP;
|
935 | faea38e7 | bellard | memset(bdi, 0, sizeof(*bdi)); |
936 | faea38e7 | bellard | return drv->bdrv_get_info(bs, bdi);
|
937 | faea38e7 | bellard | } |
938 | faea38e7 | bellard | |
939 | faea38e7 | bellard | /**************************************************************/
|
940 | faea38e7 | bellard | /* handling of snapshots */
|
941 | faea38e7 | bellard | |
942 | 5fafdf24 | ths | int bdrv_snapshot_create(BlockDriverState *bs,
|
943 | faea38e7 | bellard | QEMUSnapshotInfo *sn_info) |
944 | faea38e7 | bellard | { |
945 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
946 | faea38e7 | bellard | if (!drv)
|
947 | 19cb3738 | bellard | return -ENOMEDIUM;
|
948 | faea38e7 | bellard | if (!drv->bdrv_snapshot_create)
|
949 | faea38e7 | bellard | return -ENOTSUP;
|
950 | faea38e7 | bellard | return drv->bdrv_snapshot_create(bs, sn_info);
|
951 | faea38e7 | bellard | } |
952 | faea38e7 | bellard | |
953 | 5fafdf24 | ths | int bdrv_snapshot_goto(BlockDriverState *bs,
|
954 | faea38e7 | bellard | const char *snapshot_id) |
955 | faea38e7 | bellard | { |
956 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
957 | faea38e7 | bellard | if (!drv)
|
958 | 19cb3738 | bellard | return -ENOMEDIUM;
|
959 | faea38e7 | bellard | if (!drv->bdrv_snapshot_goto)
|
960 | faea38e7 | bellard | return -ENOTSUP;
|
961 | faea38e7 | bellard | return drv->bdrv_snapshot_goto(bs, snapshot_id);
|
962 | faea38e7 | bellard | } |
963 | faea38e7 | bellard | |
964 | faea38e7 | bellard | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
965 | faea38e7 | bellard | { |
966 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
967 | faea38e7 | bellard | if (!drv)
|
968 | 19cb3738 | bellard | return -ENOMEDIUM;
|
969 | faea38e7 | bellard | if (!drv->bdrv_snapshot_delete)
|
970 | faea38e7 | bellard | return -ENOTSUP;
|
971 | faea38e7 | bellard | return drv->bdrv_snapshot_delete(bs, snapshot_id);
|
972 | faea38e7 | bellard | } |
973 | faea38e7 | bellard | |
974 | 5fafdf24 | ths | int bdrv_snapshot_list(BlockDriverState *bs,
|
975 | faea38e7 | bellard | QEMUSnapshotInfo **psn_info) |
976 | faea38e7 | bellard | { |
977 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
978 | faea38e7 | bellard | if (!drv)
|
979 | 19cb3738 | bellard | return -ENOMEDIUM;
|
980 | faea38e7 | bellard | if (!drv->bdrv_snapshot_list)
|
981 | faea38e7 | bellard | return -ENOTSUP;
|
982 | faea38e7 | bellard | return drv->bdrv_snapshot_list(bs, psn_info);
|
983 | faea38e7 | bellard | } |
984 | faea38e7 | bellard | |
985 | faea38e7 | bellard | #define NB_SUFFIXES 4 |
986 | faea38e7 | bellard | |
987 | faea38e7 | bellard | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
988 | faea38e7 | bellard | { |
989 | faea38e7 | bellard | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
990 | faea38e7 | bellard | int64_t base; |
991 | faea38e7 | bellard | int i;
|
992 | faea38e7 | bellard | |
993 | faea38e7 | bellard | if (size <= 999) { |
994 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64, size);
|
995 | faea38e7 | bellard | } else {
|
996 | faea38e7 | bellard | base = 1024;
|
997 | faea38e7 | bellard | for(i = 0; i < NB_SUFFIXES; i++) { |
998 | faea38e7 | bellard | if (size < (10 * base)) { |
999 | 5fafdf24 | ths | snprintf(buf, buf_size, "%0.1f%c",
|
1000 | faea38e7 | bellard | (double)size / base,
|
1001 | faea38e7 | bellard | suffixes[i]); |
1002 | faea38e7 | bellard | break;
|
1003 | faea38e7 | bellard | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
1004 | 5fafdf24 | ths | snprintf(buf, buf_size, "%" PRId64 "%c", |
1005 | faea38e7 | bellard | ((size + (base >> 1)) / base),
|
1006 | faea38e7 | bellard | suffixes[i]); |
1007 | faea38e7 | bellard | break;
|
1008 | faea38e7 | bellard | } |
1009 | faea38e7 | bellard | base = base * 1024;
|
1010 | faea38e7 | bellard | } |
1011 | faea38e7 | bellard | } |
1012 | faea38e7 | bellard | return buf;
|
1013 | faea38e7 | bellard | } |
1014 | faea38e7 | bellard | |
1015 | faea38e7 | bellard | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
1016 | faea38e7 | bellard | { |
1017 | faea38e7 | bellard | char buf1[128], date_buf[128], clock_buf[128]; |
1018 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1019 | 3b9f94e1 | bellard | struct tm *ptm;
|
1020 | 3b9f94e1 | bellard | #else
|
1021 | faea38e7 | bellard | struct tm tm;
|
1022 | 3b9f94e1 | bellard | #endif
|
1023 | faea38e7 | bellard | time_t ti; |
1024 | faea38e7 | bellard | int64_t secs; |
1025 | faea38e7 | bellard | |
1026 | faea38e7 | bellard | if (!sn) {
|
1027 | 5fafdf24 | ths | snprintf(buf, buf_size, |
1028 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1029 | faea38e7 | bellard | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1030 | faea38e7 | bellard | } else {
|
1031 | faea38e7 | bellard | ti = sn->date_sec; |
1032 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1033 | 3b9f94e1 | bellard | ptm = localtime(&ti); |
1034 | 3b9f94e1 | bellard | strftime(date_buf, sizeof(date_buf),
|
1035 | 3b9f94e1 | bellard | "%Y-%m-%d %H:%M:%S", ptm);
|
1036 | 3b9f94e1 | bellard | #else
|
1037 | faea38e7 | bellard | localtime_r(&ti, &tm); |
1038 | faea38e7 | bellard | strftime(date_buf, sizeof(date_buf),
|
1039 | faea38e7 | bellard | "%Y-%m-%d %H:%M:%S", &tm);
|
1040 | 3b9f94e1 | bellard | #endif
|
1041 | faea38e7 | bellard | secs = sn->vm_clock_nsec / 1000000000;
|
1042 | faea38e7 | bellard | snprintf(clock_buf, sizeof(clock_buf),
|
1043 | faea38e7 | bellard | "%02d:%02d:%02d.%03d",
|
1044 | faea38e7 | bellard | (int)(secs / 3600), |
1045 | faea38e7 | bellard | (int)((secs / 60) % 60), |
1046 | 5fafdf24 | ths | (int)(secs % 60), |
1047 | faea38e7 | bellard | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1048 | faea38e7 | bellard | snprintf(buf, buf_size, |
1049 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1050 | faea38e7 | bellard | sn->id_str, sn->name, |
1051 | faea38e7 | bellard | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
|
1052 | faea38e7 | bellard | date_buf, |
1053 | faea38e7 | bellard | clock_buf); |
1054 | faea38e7 | bellard | } |
1055 | faea38e7 | bellard | return buf;
|
1056 | faea38e7 | bellard | } |
1057 | faea38e7 | bellard | |
1058 | 83f64091 | bellard | |
1059 | ea2384d3 | bellard | /**************************************************************/
|
1060 | 83f64091 | bellard | /* async I/Os */
|
1061 | ea2384d3 | bellard | |
1062 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1063 | ce1a14dc | pbrook | uint8_t *buf, int nb_sectors,
|
1064 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1065 | 83f64091 | bellard | { |
1066 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1067 | 83f64091 | bellard | |
1068 | 19cb3738 | bellard | if (!drv)
|
1069 | ce1a14dc | pbrook | return NULL; |
1070 | 3b46e624 | ths | |
1071 | 83f64091 | bellard | /* XXX: we assume that nb_sectors == 0 is suppored by the async read */
|
1072 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
1073 | 83f64091 | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
1074 | 83f64091 | bellard | sector_num++; |
1075 | 83f64091 | bellard | nb_sectors--; |
1076 | 83f64091 | bellard | buf += 512;
|
1077 | 83f64091 | bellard | } |
1078 | 83f64091 | bellard | |
1079 | ce1a14dc | pbrook | return drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque);
|
1080 | ea2384d3 | bellard | } |
1081 | ea2384d3 | bellard | |
1082 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1083 | ce1a14dc | pbrook | const uint8_t *buf, int nb_sectors, |
1084 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1085 | ea2384d3 | bellard | { |
1086 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1087 | ea2384d3 | bellard | |
1088 | 19cb3738 | bellard | if (!drv)
|
1089 | ce1a14dc | pbrook | return NULL; |
1090 | 83f64091 | bellard | if (bs->read_only)
|
1091 | ce1a14dc | pbrook | return NULL; |
1092 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
1093 | 3b46e624 | ths | memcpy(bs->boot_sector_data, buf, 512);
|
1094 | ea2384d3 | bellard | } |
1095 | 83f64091 | bellard | |
1096 | ce1a14dc | pbrook | return drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque);
|
1097 | 83f64091 | bellard | } |
1098 | 83f64091 | bellard | |
1099 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
1100 | 83f64091 | bellard | { |
1101 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1102 | 83f64091 | bellard | |
1103 | ce1a14dc | pbrook | drv->bdrv_aio_cancel(acb); |
1104 | 83f64091 | bellard | } |
1105 | 83f64091 | bellard | |
1106 | ce1a14dc | pbrook | |
1107 | 83f64091 | bellard | /**************************************************************/
|
1108 | 83f64091 | bellard | /* async block device emulation */
|
1109 | 83f64091 | bellard | |
1110 | faf07963 | pbrook | #ifdef QEMU_IMG
|
1111 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
|
1112 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
1113 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1114 | ea2384d3 | bellard | { |
1115 | ea2384d3 | bellard | int ret;
|
1116 | ce1a14dc | pbrook | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
1117 | ce1a14dc | pbrook | cb(opaque, ret); |
1118 | ce1a14dc | pbrook | return NULL; |
1119 | ea2384d3 | bellard | } |
1120 | ea2384d3 | bellard | |
1121 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
|
1122 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
1123 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1124 | ea2384d3 | bellard | { |
1125 | ea2384d3 | bellard | int ret;
|
1126 | ce1a14dc | pbrook | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
1127 | ce1a14dc | pbrook | cb(opaque, ret); |
1128 | ce1a14dc | pbrook | return NULL; |
1129 | ea2384d3 | bellard | } |
1130 | ea2384d3 | bellard | |
1131 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb) |
1132 | ea2384d3 | bellard | { |
1133 | ea2384d3 | bellard | } |
1134 | 83f64091 | bellard | #else
|
1135 | ce1a14dc | pbrook | static void bdrv_aio_bh_cb(void *opaque) |
1136 | 83f64091 | bellard | { |
1137 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = opaque; |
1138 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, acb->ret); |
1139 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1140 | 83f64091 | bellard | } |
1141 | beac80cd | bellard | |
1142 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
|
1143 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
1144 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1145 | 83f64091 | bellard | { |
1146 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1147 | 83f64091 | bellard | int ret;
|
1148 | ce1a14dc | pbrook | |
1149 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1150 | ce1a14dc | pbrook | if (!acb->bh)
|
1151 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1152 | ce1a14dc | pbrook | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
1153 | ce1a14dc | pbrook | acb->ret = ret; |
1154 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1155 | ce1a14dc | pbrook | return &acb->common;
|
1156 | beac80cd | bellard | } |
1157 | beac80cd | bellard | |
1158 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
|
1159 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
1160 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1161 | beac80cd | bellard | { |
1162 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1163 | 83f64091 | bellard | int ret;
|
1164 | 83f64091 | bellard | |
1165 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1166 | ce1a14dc | pbrook | if (!acb->bh)
|
1167 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1168 | ce1a14dc | pbrook | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
1169 | ce1a14dc | pbrook | acb->ret = ret; |
1170 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1171 | ce1a14dc | pbrook | return &acb->common;
|
1172 | beac80cd | bellard | } |
1173 | beac80cd | bellard | |
1174 | ce1a14dc | pbrook | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
1175 | ea2384d3 | bellard | { |
1176 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1177 | ce1a14dc | pbrook | qemu_bh_cancel(acb->bh); |
1178 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1179 | 83f64091 | bellard | } |
1180 | faf07963 | pbrook | #endif /* !QEMU_IMG */ |
1181 | ea2384d3 | bellard | |
1182 | 83f64091 | bellard | /**************************************************************/
|
1183 | 83f64091 | bellard | /* sync block device emulation */
|
1184 | ea2384d3 | bellard | |
1185 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
1186 | 83f64091 | bellard | { |
1187 | 83f64091 | bellard | *(int *)opaque = ret;
|
1188 | ea2384d3 | bellard | } |
1189 | ea2384d3 | bellard | |
1190 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
1191 | 83f64091 | bellard | |
1192 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
1193 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1194 | 7a6cba61 | pbrook | { |
1195 | ce1a14dc | pbrook | int async_ret;
|
1196 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1197 | 83f64091 | bellard | |
1198 | 83f64091 | bellard | async_ret = NOT_DONE; |
1199 | 83f64091 | bellard | qemu_aio_wait_start(); |
1200 | 5fafdf24 | ths | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
1201 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1202 | ce1a14dc | pbrook | if (acb == NULL) { |
1203 | 83f64091 | bellard | qemu_aio_wait_end(); |
1204 | ce1a14dc | pbrook | return -1; |
1205 | 83f64091 | bellard | } |
1206 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1207 | 83f64091 | bellard | qemu_aio_wait(); |
1208 | 83f64091 | bellard | } |
1209 | 83f64091 | bellard | qemu_aio_wait_end(); |
1210 | 83f64091 | bellard | return async_ret;
|
1211 | 7a6cba61 | pbrook | } |
1212 | 7a6cba61 | pbrook | |
1213 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1214 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1215 | 83f64091 | bellard | { |
1216 | ce1a14dc | pbrook | int async_ret;
|
1217 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1218 | 83f64091 | bellard | |
1219 | 83f64091 | bellard | async_ret = NOT_DONE; |
1220 | 83f64091 | bellard | qemu_aio_wait_start(); |
1221 | 5fafdf24 | ths | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
1222 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1223 | ce1a14dc | pbrook | if (acb == NULL) { |
1224 | 83f64091 | bellard | qemu_aio_wait_end(); |
1225 | ce1a14dc | pbrook | return -1; |
1226 | 83f64091 | bellard | } |
1227 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1228 | 83f64091 | bellard | qemu_aio_wait(); |
1229 | 83f64091 | bellard | } |
1230 | 83f64091 | bellard | qemu_aio_wait_end(); |
1231 | 83f64091 | bellard | return async_ret;
|
1232 | 83f64091 | bellard | } |
1233 | ea2384d3 | bellard | |
1234 | ea2384d3 | bellard | void bdrv_init(void) |
1235 | ea2384d3 | bellard | { |
1236 | ea2384d3 | bellard | bdrv_register(&bdrv_raw); |
1237 | 19cb3738 | bellard | bdrv_register(&bdrv_host_device); |
1238 | ea2384d3 | bellard | #ifndef _WIN32
|
1239 | ea2384d3 | bellard | bdrv_register(&bdrv_cow); |
1240 | ea2384d3 | bellard | #endif
|
1241 | ea2384d3 | bellard | bdrv_register(&bdrv_qcow); |
1242 | ea2384d3 | bellard | bdrv_register(&bdrv_vmdk); |
1243 | 3c56521b | bellard | bdrv_register(&bdrv_cloop); |
1244 | 585d0ed9 | bellard | bdrv_register(&bdrv_dmg); |
1245 | a8753c34 | bellard | bdrv_register(&bdrv_bochs); |
1246 | 6a0f9e82 | bellard | bdrv_register(&bdrv_vpc); |
1247 | 712e7874 | bellard | bdrv_register(&bdrv_vvfat); |
1248 | faea38e7 | bellard | bdrv_register(&bdrv_qcow2); |
1249 | 6ada7453 | ths | bdrv_register(&bdrv_parallels); |
1250 | ea2384d3 | bellard | } |
1251 | ce1a14dc | pbrook | |
1252 | ce1a14dc | pbrook | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
|
1253 | ce1a14dc | pbrook | void *opaque)
|
1254 | ce1a14dc | pbrook | { |
1255 | ce1a14dc | pbrook | BlockDriver *drv; |
1256 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1257 | ce1a14dc | pbrook | |
1258 | ce1a14dc | pbrook | drv = bs->drv; |
1259 | ce1a14dc | pbrook | if (drv->free_aiocb) {
|
1260 | ce1a14dc | pbrook | acb = drv->free_aiocb; |
1261 | ce1a14dc | pbrook | drv->free_aiocb = acb->next; |
1262 | ce1a14dc | pbrook | } else {
|
1263 | ce1a14dc | pbrook | acb = qemu_mallocz(drv->aiocb_size); |
1264 | ce1a14dc | pbrook | if (!acb)
|
1265 | ce1a14dc | pbrook | return NULL; |
1266 | ce1a14dc | pbrook | } |
1267 | ce1a14dc | pbrook | acb->bs = bs; |
1268 | ce1a14dc | pbrook | acb->cb = cb; |
1269 | ce1a14dc | pbrook | acb->opaque = opaque; |
1270 | ce1a14dc | pbrook | return acb;
|
1271 | ce1a14dc | pbrook | } |
1272 | ce1a14dc | pbrook | |
1273 | ce1a14dc | pbrook | void qemu_aio_release(void *p) |
1274 | ce1a14dc | pbrook | { |
1275 | ce1a14dc | pbrook | BlockDriverAIOCB *acb = p; |
1276 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1277 | ce1a14dc | pbrook | acb->next = drv->free_aiocb; |
1278 | ce1a14dc | pbrook | drv->free_aiocb = acb; |
1279 | ce1a14dc | pbrook | } |
1280 | 19cb3738 | bellard | |
1281 | 19cb3738 | bellard | /**************************************************************/
|
1282 | 19cb3738 | bellard | /* removable device support */
|
1283 | 19cb3738 | bellard | |
1284 | 19cb3738 | bellard | /**
|
1285 | 19cb3738 | bellard | * Return TRUE if the media is present
|
1286 | 19cb3738 | bellard | */
|
1287 | 19cb3738 | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
1288 | 19cb3738 | bellard | { |
1289 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1290 | 19cb3738 | bellard | int ret;
|
1291 | 19cb3738 | bellard | if (!drv)
|
1292 | 19cb3738 | bellard | return 0; |
1293 | 19cb3738 | bellard | if (!drv->bdrv_is_inserted)
|
1294 | 19cb3738 | bellard | return 1; |
1295 | 19cb3738 | bellard | ret = drv->bdrv_is_inserted(bs); |
1296 | 19cb3738 | bellard | return ret;
|
1297 | 19cb3738 | bellard | } |
1298 | 19cb3738 | bellard | |
1299 | 19cb3738 | bellard | /**
|
1300 | 19cb3738 | bellard | * Return TRUE if the media changed since the last call to this
|
1301 | 5fafdf24 | ths | * function. It is currently only used for floppy disks
|
1302 | 19cb3738 | bellard | */
|
1303 | 19cb3738 | bellard | int bdrv_media_changed(BlockDriverState *bs)
|
1304 | 19cb3738 | bellard | { |
1305 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1306 | 19cb3738 | bellard | int ret;
|
1307 | 19cb3738 | bellard | |
1308 | 19cb3738 | bellard | if (!drv || !drv->bdrv_media_changed)
|
1309 | 19cb3738 | bellard | ret = -ENOTSUP; |
1310 | 19cb3738 | bellard | else
|
1311 | 19cb3738 | bellard | ret = drv->bdrv_media_changed(bs); |
1312 | 19cb3738 | bellard | if (ret == -ENOTSUP)
|
1313 | 19cb3738 | bellard | ret = bs->media_changed; |
1314 | 19cb3738 | bellard | bs->media_changed = 0;
|
1315 | 19cb3738 | bellard | return ret;
|
1316 | 19cb3738 | bellard | } |
1317 | 19cb3738 | bellard | |
1318 | 19cb3738 | bellard | /**
|
1319 | 19cb3738 | bellard | * If eject_flag is TRUE, eject the media. Otherwise, close the tray
|
1320 | 19cb3738 | bellard | */
|
1321 | 19cb3738 | bellard | void bdrv_eject(BlockDriverState *bs, int eject_flag) |
1322 | 19cb3738 | bellard | { |
1323 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1324 | 19cb3738 | bellard | int ret;
|
1325 | 19cb3738 | bellard | |
1326 | 19cb3738 | bellard | if (!drv || !drv->bdrv_eject) {
|
1327 | 19cb3738 | bellard | ret = -ENOTSUP; |
1328 | 19cb3738 | bellard | } else {
|
1329 | 19cb3738 | bellard | ret = drv->bdrv_eject(bs, eject_flag); |
1330 | 19cb3738 | bellard | } |
1331 | 19cb3738 | bellard | if (ret == -ENOTSUP) {
|
1332 | 19cb3738 | bellard | if (eject_flag)
|
1333 | 19cb3738 | bellard | bdrv_close(bs); |
1334 | 19cb3738 | bellard | } |
1335 | 19cb3738 | bellard | } |
1336 | 19cb3738 | bellard | |
1337 | 19cb3738 | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
1338 | 19cb3738 | bellard | { |
1339 | 19cb3738 | bellard | return bs->locked;
|
1340 | 19cb3738 | bellard | } |
1341 | 19cb3738 | bellard | |
1342 | 19cb3738 | bellard | /**
|
1343 | 19cb3738 | bellard | * Lock or unlock the media (if it is locked, the user won't be able
|
1344 | 19cb3738 | bellard | * to eject it manually).
|
1345 | 19cb3738 | bellard | */
|
1346 | 19cb3738 | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
1347 | 19cb3738 | bellard | { |
1348 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1349 | 19cb3738 | bellard | |
1350 | 19cb3738 | bellard | bs->locked = locked; |
1351 | 19cb3738 | bellard | if (drv && drv->bdrv_set_locked) {
|
1352 | 19cb3738 | bellard | drv->bdrv_set_locked(bs, locked); |
1353 | 19cb3738 | bellard | } |
1354 | 19cb3738 | bellard | } |