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1 | fc01f7e7 | bellard | /*
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2 | fc01f7e7 | bellard | * QEMU System Emulator block driver
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3 | fc01f7e7 | bellard | *
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4 | fc01f7e7 | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | fc01f7e7 | bellard | *
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6 | fc01f7e7 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | fc01f7e7 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | fc01f7e7 | bellard | * in the Software without restriction, including without limitation the rights
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9 | fc01f7e7 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | fc01f7e7 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | fc01f7e7 | bellard | * furnished to do so, subject to the following conditions:
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12 | fc01f7e7 | bellard | *
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13 | fc01f7e7 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | fc01f7e7 | bellard | * all copies or substantial portions of the Software.
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15 | fc01f7e7 | bellard | *
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16 | fc01f7e7 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | fc01f7e7 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | fc01f7e7 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | fc01f7e7 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | fc01f7e7 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | fc01f7e7 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | fc01f7e7 | bellard | * THE SOFTWARE.
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23 | fc01f7e7 | bellard | */
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24 | fc01f7e7 | bellard | #include "vl.h" |
25 | ea2384d3 | bellard | #include "block_int.h" |
26 | fc01f7e7 | bellard | |
27 | 7674e7bf | bellard | #ifdef _BSD
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28 | 7674e7bf | bellard | #include <sys/types.h> |
29 | 7674e7bf | bellard | #include <sys/stat.h> |
30 | 7674e7bf | bellard | #include <sys/ioctl.h> |
31 | 7674e7bf | bellard | #include <sys/queue.h> |
32 | 7674e7bf | bellard | #include <sys/disk.h> |
33 | 7674e7bf | bellard | #endif
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34 | 7674e7bf | bellard | |
35 | 83f64091 | bellard | #define SECTOR_BITS 9 |
36 | 83f64091 | bellard | #define SECTOR_SIZE (1 << SECTOR_BITS) |
37 | 83f64091 | bellard | |
38 | 90765429 | bellard | typedef struct BlockDriverAIOCBSync { |
39 | 90765429 | bellard | BlockDriverAIOCB common; |
40 | 90765429 | bellard | QEMUBH *bh; |
41 | 90765429 | bellard | int ret;
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42 | 90765429 | bellard | } BlockDriverAIOCBSync; |
43 | 90765429 | bellard | |
44 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
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45 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
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46 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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47 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
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48 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
49 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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50 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
51 | 83f64091 | bellard | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
52 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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53 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
54 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
55 | ec530c81 | bellard | |
56 | b338082b | bellard | static BlockDriverState *bdrv_first;
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57 | ea2384d3 | bellard | static BlockDriver *first_drv;
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58 | ea2384d3 | bellard | |
59 | 83f64091 | bellard | int path_is_absolute(const char *path) |
60 | 3b0d4f61 | bellard | { |
61 | 83f64091 | bellard | const char *p; |
62 | 21664424 | bellard | #ifdef _WIN32
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63 | 21664424 | bellard | /* specific case for names like: "\\.\d:" */
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64 | 21664424 | bellard | if (*path == '/' || *path == '\\') |
65 | 21664424 | bellard | return 1; |
66 | 21664424 | bellard | #endif
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67 | 83f64091 | bellard | p = strchr(path, ':');
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68 | 83f64091 | bellard | if (p)
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69 | 83f64091 | bellard | p++; |
70 | 83f64091 | bellard | else
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71 | 83f64091 | bellard | p = path; |
72 | 3b9f94e1 | bellard | #ifdef _WIN32
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73 | 3b9f94e1 | bellard | return (*p == '/' || *p == '\\'); |
74 | 3b9f94e1 | bellard | #else
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75 | 3b9f94e1 | bellard | return (*p == '/'); |
76 | 3b9f94e1 | bellard | #endif
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77 | 3b0d4f61 | bellard | } |
78 | 3b0d4f61 | bellard | |
79 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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80 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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81 | 83f64091 | bellard | supported. */
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82 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
83 | 83f64091 | bellard | const char *base_path, |
84 | 83f64091 | bellard | const char *filename) |
85 | 3b0d4f61 | bellard | { |
86 | 83f64091 | bellard | const char *p, *p1; |
87 | 83f64091 | bellard | int len;
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88 | 83f64091 | bellard | |
89 | 83f64091 | bellard | if (dest_size <= 0) |
90 | 83f64091 | bellard | return;
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91 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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92 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
93 | 83f64091 | bellard | } else {
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94 | 83f64091 | bellard | p = strchr(base_path, ':');
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95 | 83f64091 | bellard | if (p)
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96 | 83f64091 | bellard | p++; |
97 | 83f64091 | bellard | else
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98 | 83f64091 | bellard | p = base_path; |
99 | 3b9f94e1 | bellard | p1 = strrchr(base_path, '/');
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100 | 3b9f94e1 | bellard | #ifdef _WIN32
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101 | 3b9f94e1 | bellard | { |
102 | 3b9f94e1 | bellard | const char *p2; |
103 | 3b9f94e1 | bellard | p2 = strrchr(base_path, '\\');
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104 | 3b9f94e1 | bellard | if (!p1 || p2 > p1)
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105 | 3b9f94e1 | bellard | p1 = p2; |
106 | 3b9f94e1 | bellard | } |
107 | 3b9f94e1 | bellard | #endif
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108 | 83f64091 | bellard | if (p1)
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109 | 83f64091 | bellard | p1++; |
110 | 83f64091 | bellard | else
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111 | 83f64091 | bellard | p1 = base_path; |
112 | 83f64091 | bellard | if (p1 > p)
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113 | 83f64091 | bellard | p = p1; |
114 | 83f64091 | bellard | len = p - base_path; |
115 | 83f64091 | bellard | if (len > dest_size - 1) |
116 | 83f64091 | bellard | len = dest_size - 1;
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117 | 83f64091 | bellard | memcpy(dest, base_path, len); |
118 | 83f64091 | bellard | dest[len] = '\0';
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119 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
120 | 3b0d4f61 | bellard | } |
121 | 3b0d4f61 | bellard | } |
122 | 3b0d4f61 | bellard | |
123 | 3b0d4f61 | bellard | |
124 | ea2384d3 | bellard | void bdrv_register(BlockDriver *bdrv)
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125 | ea2384d3 | bellard | { |
126 | ce1a14dc | pbrook | if (!bdrv->bdrv_aio_read) {
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127 | 83f64091 | bellard | /* add AIO emulation layer */
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128 | 83f64091 | bellard | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
129 | 83f64091 | bellard | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
130 | 83f64091 | bellard | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
131 | 90765429 | bellard | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync);
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132 | 83f64091 | bellard | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
133 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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134 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
135 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
136 | 83f64091 | bellard | } |
137 | ea2384d3 | bellard | bdrv->next = first_drv; |
138 | ea2384d3 | bellard | first_drv = bdrv; |
139 | ea2384d3 | bellard | } |
140 | b338082b | bellard | |
141 | b338082b | bellard | /* create a new block device (by default it is empty) */
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142 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
143 | b338082b | bellard | { |
144 | b338082b | bellard | BlockDriverState **pbs, *bs; |
145 | b338082b | bellard | |
146 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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147 | b338082b | bellard | if(!bs)
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148 | b338082b | bellard | return NULL; |
149 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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150 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
151 | ea2384d3 | bellard | /* insert at the end */
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152 | ea2384d3 | bellard | pbs = &bdrv_first; |
153 | ea2384d3 | bellard | while (*pbs != NULL) |
154 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
155 | ea2384d3 | bellard | *pbs = bs; |
156 | ea2384d3 | bellard | } |
157 | b338082b | bellard | return bs;
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158 | b338082b | bellard | } |
159 | b338082b | bellard | |
160 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
161 | ea2384d3 | bellard | { |
162 | ea2384d3 | bellard | BlockDriver *drv1; |
163 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
164 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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165 | ea2384d3 | bellard | return drv1;
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166 | ea2384d3 | bellard | } |
167 | ea2384d3 | bellard | return NULL; |
168 | ea2384d3 | bellard | } |
169 | ea2384d3 | bellard | |
170 | ea2384d3 | bellard | int bdrv_create(BlockDriver *drv,
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171 | ea2384d3 | bellard | const char *filename, int64_t size_in_sectors, |
172 | ea2384d3 | bellard | const char *backing_file, int flags) |
173 | ea2384d3 | bellard | { |
174 | ea2384d3 | bellard | if (!drv->bdrv_create)
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175 | ea2384d3 | bellard | return -ENOTSUP;
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176 | ea2384d3 | bellard | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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177 | ea2384d3 | bellard | } |
178 | ea2384d3 | bellard | |
179 | d5249393 | bellard | #ifdef _WIN32
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180 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
181 | d5249393 | bellard | { |
182 | 3b9f94e1 | bellard | char temp_dir[MAX_PATH];
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183 | 3b9f94e1 | bellard | |
184 | 3b9f94e1 | bellard | GetTempPath(MAX_PATH, temp_dir); |
185 | 3b9f94e1 | bellard | GetTempFileName(temp_dir, "qem", 0, filename); |
186 | d5249393 | bellard | } |
187 | d5249393 | bellard | #else
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188 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
189 | fc01f7e7 | bellard | { |
190 | 67b915a5 | bellard | int fd;
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191 | d5249393 | bellard | /* XXX: race condition possible */
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192 | ea2384d3 | bellard | pstrcpy(filename, size, "/tmp/vl.XXXXXX");
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193 | ea2384d3 | bellard | fd = mkstemp(filename); |
194 | ea2384d3 | bellard | close(fd); |
195 | ea2384d3 | bellard | } |
196 | d5249393 | bellard | #endif
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197 | fc01f7e7 | bellard | |
198 | 19cb3738 | bellard | #ifdef _WIN32
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199 | f45512fe | bellard | static int is_windows_drive_prefix(const char *filename) |
200 | f45512fe | bellard | { |
201 | f45512fe | bellard | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
202 | f45512fe | bellard | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
203 | f45512fe | bellard | filename[1] == ':'); |
204 | f45512fe | bellard | } |
205 | f45512fe | bellard | |
206 | 19cb3738 | bellard | static int is_windows_drive(const char *filename) |
207 | 19cb3738 | bellard | { |
208 | f45512fe | bellard | if (is_windows_drive_prefix(filename) &&
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209 | f45512fe | bellard | filename[2] == '\0') |
210 | 19cb3738 | bellard | return 1; |
211 | 19cb3738 | bellard | if (strstart(filename, "\\\\.\\", NULL) || |
212 | 19cb3738 | bellard | strstart(filename, "//./", NULL)) |
213 | 19cb3738 | bellard | return 1; |
214 | 19cb3738 | bellard | return 0; |
215 | 19cb3738 | bellard | } |
216 | 19cb3738 | bellard | #endif
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217 | 19cb3738 | bellard | |
218 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
219 | 83f64091 | bellard | { |
220 | 83f64091 | bellard | BlockDriver *drv1; |
221 | 83f64091 | bellard | char protocol[128]; |
222 | 83f64091 | bellard | int len;
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223 | 83f64091 | bellard | const char *p; |
224 | 19cb3738 | bellard | |
225 | 19cb3738 | bellard | #ifdef _WIN32
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226 | f45512fe | bellard | if (is_windows_drive(filename) ||
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227 | f45512fe | bellard | is_windows_drive_prefix(filename)) |
228 | 19cb3738 | bellard | return &bdrv_raw;
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229 | 19cb3738 | bellard | #endif
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230 | 83f64091 | bellard | p = strchr(filename, ':');
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231 | 83f64091 | bellard | if (!p)
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232 | 83f64091 | bellard | return &bdrv_raw;
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233 | 83f64091 | bellard | len = p - filename; |
234 | 83f64091 | bellard | if (len > sizeof(protocol) - 1) |
235 | 83f64091 | bellard | len = sizeof(protocol) - 1; |
236 | 83f64091 | bellard | memcpy(protocol, filename, len); |
237 | 83f64091 | bellard | protocol[len] = '\0';
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238 | 83f64091 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
239 | 83f64091 | bellard | if (drv1->protocol_name &&
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240 | 83f64091 | bellard | !strcmp(drv1->protocol_name, protocol)) |
241 | 83f64091 | bellard | return drv1;
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242 | 83f64091 | bellard | } |
243 | 83f64091 | bellard | return NULL; |
244 | 83f64091 | bellard | } |
245 | 83f64091 | bellard | |
246 | 7674e7bf | bellard | /* XXX: force raw format if block or character device ? It would
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247 | 7674e7bf | bellard | simplify the BSD case */
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248 | ea2384d3 | bellard | static BlockDriver *find_image_format(const char *filename) |
249 | ea2384d3 | bellard | { |
250 | 83f64091 | bellard | int ret, score, score_max;
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251 | ea2384d3 | bellard | BlockDriver *drv1, *drv; |
252 | 83f64091 | bellard | uint8_t buf[2048];
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253 | 83f64091 | bellard | BlockDriverState *bs; |
254 | ea2384d3 | bellard | |
255 | 19cb3738 | bellard | /* detect host devices. By convention, /dev/cdrom[N] is always
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256 | 19cb3738 | bellard | recognized as a host CDROM */
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257 | 19cb3738 | bellard | if (strstart(filename, "/dev/cdrom", NULL)) |
258 | 19cb3738 | bellard | return &bdrv_host_device;
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259 | 19cb3738 | bellard | #ifdef _WIN32
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260 | 19cb3738 | bellard | if (is_windows_drive(filename))
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261 | 19cb3738 | bellard | return &bdrv_host_device;
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262 | 19cb3738 | bellard | #else
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263 | 19cb3738 | bellard | { |
264 | 19cb3738 | bellard | struct stat st;
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265 | 19cb3738 | bellard | if (stat(filename, &st) >= 0 && |
266 | 19cb3738 | bellard | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
267 | 19cb3738 | bellard | return &bdrv_host_device;
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268 | 19cb3738 | bellard | } |
269 | 19cb3738 | bellard | } |
270 | 19cb3738 | bellard | #endif
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271 | 19cb3738 | bellard | |
272 | 83f64091 | bellard | drv = find_protocol(filename); |
273 | 19cb3738 | bellard | /* no need to test disk image formats for vvfat */
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274 | 83f64091 | bellard | if (drv == &bdrv_vvfat)
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275 | 83f64091 | bellard | return drv;
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276 | 19cb3738 | bellard | |
277 | 83f64091 | bellard | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
278 | 83f64091 | bellard | if (ret < 0) |
279 | 83f64091 | bellard | return NULL; |
280 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
281 | 83f64091 | bellard | bdrv_delete(bs); |
282 | 83f64091 | bellard | if (ret < 0) { |
283 | 83f64091 | bellard | return NULL; |
284 | 83f64091 | bellard | } |
285 | 83f64091 | bellard | |
286 | ea2384d3 | bellard | score_max = 0;
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287 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
288 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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289 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
290 | 83f64091 | bellard | if (score > score_max) {
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291 | 83f64091 | bellard | score_max = score; |
292 | 83f64091 | bellard | drv = drv1; |
293 | 83f64091 | bellard | } |
294 | 0849bf08 | bellard | } |
295 | fc01f7e7 | bellard | } |
296 | ea2384d3 | bellard | return drv;
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297 | ea2384d3 | bellard | } |
298 | ea2384d3 | bellard | |
299 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
300 | ea2384d3 | bellard | { |
301 | 83f64091 | bellard | BlockDriverState *bs; |
302 | 83f64091 | bellard | int ret;
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303 | 83f64091 | bellard | |
304 | 83f64091 | bellard | bs = bdrv_new("");
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305 | 83f64091 | bellard | if (!bs)
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306 | 83f64091 | bellard | return -ENOMEM;
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307 | 83f64091 | bellard | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
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308 | 83f64091 | bellard | if (ret < 0) { |
309 | 83f64091 | bellard | bdrv_delete(bs); |
310 | 83f64091 | bellard | return ret;
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311 | 3b0d4f61 | bellard | } |
312 | 83f64091 | bellard | *pbs = bs; |
313 | 83f64091 | bellard | return 0; |
314 | 83f64091 | bellard | } |
315 | 83f64091 | bellard | |
316 | 83f64091 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
317 | 83f64091 | bellard | { |
318 | 83f64091 | bellard | return bdrv_open2(bs, filename, flags, NULL); |
319 | ea2384d3 | bellard | } |
320 | ea2384d3 | bellard | |
321 | 83f64091 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
322 | ea2384d3 | bellard | BlockDriver *drv) |
323 | ea2384d3 | bellard | { |
324 | 83f64091 | bellard | int ret, open_flags;
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325 | eb5c851f | ths | char tmp_filename[PATH_MAX];
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326 | eb5c851f | ths | char backing_filename[PATH_MAX];
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327 | ea2384d3 | bellard | |
328 | ea2384d3 | bellard | bs->read_only = 0;
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329 | ea2384d3 | bellard | bs->is_temporary = 0;
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330 | ea2384d3 | bellard | bs->encrypted = 0;
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331 | 712e7874 | bellard | |
332 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
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333 | ea2384d3 | bellard | BlockDriverState *bs1; |
334 | ea2384d3 | bellard | int64_t total_size; |
335 | ea2384d3 | bellard | |
336 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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337 | ea2384d3 | bellard | instead of opening 'filename' directly */
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338 | 33e3963e | bellard | |
339 | ea2384d3 | bellard | /* if there is a backing file, use it */
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340 | ea2384d3 | bellard | bs1 = bdrv_new("");
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341 | ea2384d3 | bellard | if (!bs1) {
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342 | 83f64091 | bellard | return -ENOMEM;
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343 | ea2384d3 | bellard | } |
344 | ea2384d3 | bellard | if (bdrv_open(bs1, filename, 0) < 0) { |
345 | ea2384d3 | bellard | bdrv_delete(bs1); |
346 | ea2384d3 | bellard | return -1; |
347 | ea2384d3 | bellard | } |
348 | 83f64091 | bellard | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
349 | ea2384d3 | bellard | bdrv_delete(bs1); |
350 | ea2384d3 | bellard | |
351 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
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352 | a817d936 | bellard | realpath(filename, backing_filename); |
353 | d15a771d | bellard | if (bdrv_create(&bdrv_qcow2, tmp_filename,
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354 | a817d936 | bellard | total_size, backing_filename, 0) < 0) { |
355 | ea2384d3 | bellard | return -1; |
356 | ea2384d3 | bellard | } |
357 | ea2384d3 | bellard | filename = tmp_filename; |
358 | ea2384d3 | bellard | bs->is_temporary = 1;
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359 | ea2384d3 | bellard | } |
360 | 712e7874 | bellard | |
361 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
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362 | 83f64091 | bellard | if (flags & BDRV_O_FILE) {
|
363 | 83f64091 | bellard | drv = find_protocol(filename); |
364 | ea2384d3 | bellard | if (!drv)
|
365 | 83f64091 | bellard | return -ENOENT;
|
366 | 83f64091 | bellard | } else {
|
367 | 83f64091 | bellard | if (!drv) {
|
368 | 83f64091 | bellard | drv = find_image_format(filename); |
369 | 83f64091 | bellard | if (!drv)
|
370 | 83f64091 | bellard | return -1; |
371 | 83f64091 | bellard | } |
372 | ea2384d3 | bellard | } |
373 | ea2384d3 | bellard | bs->drv = drv; |
374 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
375 | ea2384d3 | bellard | if (bs->opaque == NULL && drv->instance_size > 0) |
376 | ea2384d3 | bellard | return -1; |
377 | 83f64091 | bellard | /* Note: for compatibility, we open disk image files as RDWR, and
|
378 | 83f64091 | bellard | RDONLY as fallback */
|
379 | 83f64091 | bellard | if (!(flags & BDRV_O_FILE))
|
380 | 83f64091 | bellard | open_flags = BDRV_O_RDWR; |
381 | 83f64091 | bellard | else
|
382 | 83f64091 | bellard | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
383 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, open_flags); |
384 | 83f64091 | bellard | if (ret == -EACCES && !(flags & BDRV_O_FILE)) {
|
385 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY); |
386 | 83f64091 | bellard | bs->read_only = 1;
|
387 | 83f64091 | bellard | } |
388 | ea2384d3 | bellard | if (ret < 0) { |
389 | ea2384d3 | bellard | qemu_free(bs->opaque); |
390 | 6b21b973 | bellard | bs->opaque = NULL;
|
391 | 6b21b973 | bellard | bs->drv = NULL;
|
392 | 83f64091 | bellard | return ret;
|
393 | 33e3963e | bellard | } |
394 | d15a771d | bellard | if (drv->bdrv_getlength) {
|
395 | d15a771d | bellard | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
396 | d15a771d | bellard | } |
397 | 67b915a5 | bellard | #ifndef _WIN32
|
398 | ea2384d3 | bellard | if (bs->is_temporary) {
|
399 | ea2384d3 | bellard | unlink(filename); |
400 | ea2384d3 | bellard | } |
401 | ea2384d3 | bellard | #endif
|
402 | 83f64091 | bellard | if (bs->backing_file[0] != '\0') { |
403 | ea2384d3 | bellard | /* if there is a backing file, use it */
|
404 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
|
405 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
406 | ea2384d3 | bellard | fail:
|
407 | ea2384d3 | bellard | bdrv_close(bs); |
408 | 6b21b973 | bellard | return -ENOMEM;
|
409 | 33e3963e | bellard | } |
410 | 83f64091 | bellard | path_combine(backing_filename, sizeof(backing_filename),
|
411 | 83f64091 | bellard | filename, bs->backing_file); |
412 | 83f64091 | bellard | if (bdrv_open(bs->backing_hd, backing_filename, 0) < 0) |
413 | 33e3963e | bellard | goto fail;
|
414 | 33e3963e | bellard | } |
415 | 33e3963e | bellard | |
416 | b338082b | bellard | /* call the change callback */
|
417 | 19cb3738 | bellard | bs->media_changed = 1;
|
418 | b338082b | bellard | if (bs->change_cb)
|
419 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
420 | b338082b | bellard | |
421 | b338082b | bellard | return 0; |
422 | fc01f7e7 | bellard | } |
423 | fc01f7e7 | bellard | |
424 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
425 | fc01f7e7 | bellard | { |
426 | 19cb3738 | bellard | if (bs->drv) {
|
427 | ea2384d3 | bellard | if (bs->backing_hd)
|
428 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
429 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
430 | ea2384d3 | bellard | qemu_free(bs->opaque); |
431 | ea2384d3 | bellard | #ifdef _WIN32
|
432 | ea2384d3 | bellard | if (bs->is_temporary) {
|
433 | ea2384d3 | bellard | unlink(bs->filename); |
434 | ea2384d3 | bellard | } |
435 | 67b915a5 | bellard | #endif
|
436 | ea2384d3 | bellard | bs->opaque = NULL;
|
437 | ea2384d3 | bellard | bs->drv = NULL;
|
438 | b338082b | bellard | |
439 | b338082b | bellard | /* call the change callback */
|
440 | 19cb3738 | bellard | bs->media_changed = 1;
|
441 | b338082b | bellard | if (bs->change_cb)
|
442 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
443 | b338082b | bellard | } |
444 | b338082b | bellard | } |
445 | b338082b | bellard | |
446 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
447 | b338082b | bellard | { |
448 | ea2384d3 | bellard | /* XXX: remove the driver list */
|
449 | b338082b | bellard | bdrv_close(bs); |
450 | b338082b | bellard | qemu_free(bs); |
451 | fc01f7e7 | bellard | } |
452 | fc01f7e7 | bellard | |
453 | 33e3963e | bellard | /* commit COW file into the raw image */
|
454 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
455 | 33e3963e | bellard | { |
456 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
457 | 83f64091 | bellard | int64_t i, total_sectors; |
458 | ea2384d3 | bellard | int n, j;
|
459 | ea2384d3 | bellard | unsigned char sector[512]; |
460 | 33e3963e | bellard | |
461 | 19cb3738 | bellard | if (!drv)
|
462 | 19cb3738 | bellard | return -ENOMEDIUM;
|
463 | 33e3963e | bellard | |
464 | 33e3963e | bellard | if (bs->read_only) {
|
465 | ea2384d3 | bellard | return -EACCES;
|
466 | 33e3963e | bellard | } |
467 | 33e3963e | bellard | |
468 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
469 | ea2384d3 | bellard | return -ENOTSUP;
|
470 | ea2384d3 | bellard | } |
471 | 33e3963e | bellard | |
472 | 83f64091 | bellard | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
473 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
474 | 19cb3738 | bellard | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
475 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
476 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
477 | ea2384d3 | bellard | return -EIO;
|
478 | ea2384d3 | bellard | } |
479 | ea2384d3 | bellard | |
480 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
481 | ea2384d3 | bellard | return -EIO;
|
482 | ea2384d3 | bellard | } |
483 | ea2384d3 | bellard | i++; |
484 | 33e3963e | bellard | } |
485 | ea2384d3 | bellard | } else {
|
486 | ea2384d3 | bellard | i += n; |
487 | ea2384d3 | bellard | } |
488 | 33e3963e | bellard | } |
489 | 95389c86 | bellard | |
490 | 19cb3738 | bellard | if (drv->bdrv_make_empty)
|
491 | 19cb3738 | bellard | return drv->bdrv_make_empty(bs);
|
492 | 95389c86 | bellard | |
493 | 33e3963e | bellard | return 0; |
494 | 33e3963e | bellard | } |
495 | 33e3963e | bellard | |
496 | 19cb3738 | bellard | /* return < 0 if error. See bdrv_write() for the return codes */
|
497 | fc01f7e7 | bellard | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
498 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
499 | fc01f7e7 | bellard | { |
500 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
501 | ea2384d3 | bellard | |
502 | 19cb3738 | bellard | if (!drv)
|
503 | 19cb3738 | bellard | return -ENOMEDIUM;
|
504 | b338082b | bellard | |
505 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
506 | cf98951b | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
507 | 83f64091 | bellard | sector_num++; |
508 | 83f64091 | bellard | nb_sectors--; |
509 | 83f64091 | bellard | buf += 512;
|
510 | 83f64091 | bellard | if (nb_sectors == 0) |
511 | 83f64091 | bellard | return 0; |
512 | 83f64091 | bellard | } |
513 | 83f64091 | bellard | if (drv->bdrv_pread) {
|
514 | 83f64091 | bellard | int ret, len;
|
515 | 83f64091 | bellard | len = nb_sectors * 512;
|
516 | 83f64091 | bellard | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len);
|
517 | 83f64091 | bellard | if (ret < 0) |
518 | 83f64091 | bellard | return ret;
|
519 | 83f64091 | bellard | else if (ret != len) |
520 | 19cb3738 | bellard | return -EINVAL;
|
521 | 83f64091 | bellard | else
|
522 | 83f64091 | bellard | return 0; |
523 | 83f64091 | bellard | } else {
|
524 | 83f64091 | bellard | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
525 | 33e3963e | bellard | } |
526 | fc01f7e7 | bellard | } |
527 | fc01f7e7 | bellard | |
528 | 19cb3738 | bellard | /* Return < 0 if error. Important errors are:
|
529 | 19cb3738 | bellard | -EIO generic I/O error (may happen for all errors)
|
530 | 19cb3738 | bellard | -ENOMEDIUM No media inserted.
|
531 | 19cb3738 | bellard | -EINVAL Invalid sector number or nb_sectors
|
532 | 19cb3738 | bellard | -EACCES Trying to write a read-only device
|
533 | 19cb3738 | bellard | */
|
534 | fc01f7e7 | bellard | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
535 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
536 | fc01f7e7 | bellard | { |
537 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
538 | 19cb3738 | bellard | if (!bs->drv)
|
539 | 19cb3738 | bellard | return -ENOMEDIUM;
|
540 | 0849bf08 | bellard | if (bs->read_only)
|
541 | 19cb3738 | bellard | return -EACCES;
|
542 | 79639d42 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
543 | 79639d42 | bellard | memcpy(bs->boot_sector_data, buf, 512);
|
544 | 79639d42 | bellard | } |
545 | 83f64091 | bellard | if (drv->bdrv_pwrite) {
|
546 | 83f64091 | bellard | int ret, len;
|
547 | 83f64091 | bellard | len = nb_sectors * 512;
|
548 | 83f64091 | bellard | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len);
|
549 | 83f64091 | bellard | if (ret < 0) |
550 | 83f64091 | bellard | return ret;
|
551 | 83f64091 | bellard | else if (ret != len) |
552 | 83f64091 | bellard | return -EIO;
|
553 | 83f64091 | bellard | else
|
554 | 83f64091 | bellard | return 0; |
555 | 83f64091 | bellard | } else {
|
556 | 83f64091 | bellard | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
557 | 83f64091 | bellard | } |
558 | 83f64091 | bellard | } |
559 | 83f64091 | bellard | |
560 | 83f64091 | bellard | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
561 | faea38e7 | bellard | uint8_t *buf, int count1)
|
562 | 83f64091 | bellard | { |
563 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
564 | 83f64091 | bellard | int len, nb_sectors, count;
|
565 | 83f64091 | bellard | int64_t sector_num; |
566 | 83f64091 | bellard | |
567 | 83f64091 | bellard | count = count1; |
568 | 83f64091 | bellard | /* first read to align to sector start */
|
569 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
570 | 83f64091 | bellard | if (len > count)
|
571 | 83f64091 | bellard | len = count; |
572 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
573 | 83f64091 | bellard | if (len > 0) { |
574 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
575 | 83f64091 | bellard | return -EIO;
|
576 | 83f64091 | bellard | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
|
577 | 83f64091 | bellard | count -= len; |
578 | 83f64091 | bellard | if (count == 0) |
579 | 83f64091 | bellard | return count1;
|
580 | 83f64091 | bellard | sector_num++; |
581 | 83f64091 | bellard | buf += len; |
582 | 83f64091 | bellard | } |
583 | 83f64091 | bellard | |
584 | 83f64091 | bellard | /* read the sectors "in place" */
|
585 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
586 | 83f64091 | bellard | if (nb_sectors > 0) { |
587 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
588 | 83f64091 | bellard | return -EIO;
|
589 | 83f64091 | bellard | sector_num += nb_sectors; |
590 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
591 | 83f64091 | bellard | buf += len; |
592 | 83f64091 | bellard | count -= len; |
593 | 83f64091 | bellard | } |
594 | 83f64091 | bellard | |
595 | 83f64091 | bellard | /* add data from the last sector */
|
596 | 83f64091 | bellard | if (count > 0) { |
597 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
598 | 83f64091 | bellard | return -EIO;
|
599 | 83f64091 | bellard | memcpy(buf, tmp_buf, count); |
600 | 83f64091 | bellard | } |
601 | 83f64091 | bellard | return count1;
|
602 | 83f64091 | bellard | } |
603 | 83f64091 | bellard | |
604 | 83f64091 | bellard | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
605 | faea38e7 | bellard | const uint8_t *buf, int count1) |
606 | 83f64091 | bellard | { |
607 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
608 | 83f64091 | bellard | int len, nb_sectors, count;
|
609 | 83f64091 | bellard | int64_t sector_num; |
610 | 83f64091 | bellard | |
611 | 83f64091 | bellard | count = count1; |
612 | 83f64091 | bellard | /* first write to align to sector start */
|
613 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
614 | 83f64091 | bellard | if (len > count)
|
615 | 83f64091 | bellard | len = count; |
616 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
617 | 83f64091 | bellard | if (len > 0) { |
618 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
619 | 83f64091 | bellard | return -EIO;
|
620 | 83f64091 | bellard | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len);
|
621 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
622 | 83f64091 | bellard | return -EIO;
|
623 | 83f64091 | bellard | count -= len; |
624 | 83f64091 | bellard | if (count == 0) |
625 | 83f64091 | bellard | return count1;
|
626 | 83f64091 | bellard | sector_num++; |
627 | 83f64091 | bellard | buf += len; |
628 | 83f64091 | bellard | } |
629 | 83f64091 | bellard | |
630 | 83f64091 | bellard | /* write the sectors "in place" */
|
631 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
632 | 83f64091 | bellard | if (nb_sectors > 0) { |
633 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
634 | 83f64091 | bellard | return -EIO;
|
635 | 83f64091 | bellard | sector_num += nb_sectors; |
636 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
637 | 83f64091 | bellard | buf += len; |
638 | 83f64091 | bellard | count -= len; |
639 | 83f64091 | bellard | } |
640 | 83f64091 | bellard | |
641 | 83f64091 | bellard | /* add data from the last sector */
|
642 | 83f64091 | bellard | if (count > 0) { |
643 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
644 | 83f64091 | bellard | return -EIO;
|
645 | 83f64091 | bellard | memcpy(tmp_buf, buf, count); |
646 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
647 | 83f64091 | bellard | return -EIO;
|
648 | 83f64091 | bellard | } |
649 | 83f64091 | bellard | return count1;
|
650 | 83f64091 | bellard | } |
651 | 83f64091 | bellard | |
652 | 83f64091 | bellard | /**
|
653 | 83f64091 | bellard | * Read with byte offsets (needed only for file protocols)
|
654 | 83f64091 | bellard | */
|
655 | 83f64091 | bellard | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
656 | 83f64091 | bellard | void *buf1, int count1) |
657 | 83f64091 | bellard | { |
658 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
659 | 83f64091 | bellard | |
660 | 83f64091 | bellard | if (!drv)
|
661 | 19cb3738 | bellard | return -ENOMEDIUM;
|
662 | 83f64091 | bellard | if (!drv->bdrv_pread)
|
663 | faea38e7 | bellard | return bdrv_pread_em(bs, offset, buf1, count1);
|
664 | 83f64091 | bellard | return drv->bdrv_pread(bs, offset, buf1, count1);
|
665 | 83f64091 | bellard | } |
666 | 83f64091 | bellard | |
667 | 83f64091 | bellard | /**
|
668 | 83f64091 | bellard | * Write with byte offsets (needed only for file protocols)
|
669 | 83f64091 | bellard | */
|
670 | 83f64091 | bellard | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
671 | 83f64091 | bellard | const void *buf1, int count1) |
672 | 83f64091 | bellard | { |
673 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
674 | 83f64091 | bellard | |
675 | 83f64091 | bellard | if (!drv)
|
676 | 19cb3738 | bellard | return -ENOMEDIUM;
|
677 | 83f64091 | bellard | if (!drv->bdrv_pwrite)
|
678 | faea38e7 | bellard | return bdrv_pwrite_em(bs, offset, buf1, count1);
|
679 | 83f64091 | bellard | return drv->bdrv_pwrite(bs, offset, buf1, count1);
|
680 | 83f64091 | bellard | } |
681 | 83f64091 | bellard | |
682 | 83f64091 | bellard | /**
|
683 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
684 | 83f64091 | bellard | */
|
685 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
686 | 83f64091 | bellard | { |
687 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
688 | 83f64091 | bellard | if (!drv)
|
689 | 19cb3738 | bellard | return -ENOMEDIUM;
|
690 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
691 | 83f64091 | bellard | return -ENOTSUP;
|
692 | 83f64091 | bellard | return drv->bdrv_truncate(bs, offset);
|
693 | 83f64091 | bellard | } |
694 | 83f64091 | bellard | |
695 | 83f64091 | bellard | /**
|
696 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
697 | 83f64091 | bellard | */
|
698 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
699 | 83f64091 | bellard | { |
700 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
701 | 83f64091 | bellard | if (!drv)
|
702 | 19cb3738 | bellard | return -ENOMEDIUM;
|
703 | 83f64091 | bellard | if (!drv->bdrv_getlength) {
|
704 | 83f64091 | bellard | /* legacy mode */
|
705 | 83f64091 | bellard | return bs->total_sectors * SECTOR_SIZE;
|
706 | 83f64091 | bellard | } |
707 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
708 | fc01f7e7 | bellard | } |
709 | fc01f7e7 | bellard | |
710 | 19cb3738 | bellard | /* return 0 as number of sectors if no device present or error */
|
711 | fc01f7e7 | bellard | void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
|
712 | fc01f7e7 | bellard | { |
713 | 19cb3738 | bellard | int64_t length; |
714 | 19cb3738 | bellard | length = bdrv_getlength(bs); |
715 | 19cb3738 | bellard | if (length < 0) |
716 | 19cb3738 | bellard | length = 0;
|
717 | 19cb3738 | bellard | else
|
718 | 19cb3738 | bellard | length = length >> SECTOR_BITS; |
719 | 19cb3738 | bellard | *nb_sectors_ptr = length; |
720 | fc01f7e7 | bellard | } |
721 | cf98951b | bellard | |
722 | cf98951b | bellard | /* force a given boot sector. */
|
723 | cf98951b | bellard | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
724 | cf98951b | bellard | { |
725 | cf98951b | bellard | bs->boot_sector_enabled = 1;
|
726 | cf98951b | bellard | if (size > 512) |
727 | cf98951b | bellard | size = 512;
|
728 | cf98951b | bellard | memcpy(bs->boot_sector_data, data, size); |
729 | cf98951b | bellard | memset(bs->boot_sector_data + size, 0, 512 - size); |
730 | cf98951b | bellard | } |
731 | b338082b | bellard | |
732 | b338082b | bellard | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
733 | b338082b | bellard | int cyls, int heads, int secs) |
734 | b338082b | bellard | { |
735 | b338082b | bellard | bs->cyls = cyls; |
736 | b338082b | bellard | bs->heads = heads; |
737 | b338082b | bellard | bs->secs = secs; |
738 | b338082b | bellard | } |
739 | b338082b | bellard | |
740 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
741 | b338082b | bellard | { |
742 | b338082b | bellard | bs->type = type; |
743 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
744 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
745 | b338082b | bellard | } |
746 | b338082b | bellard | |
747 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
748 | 46d4767d | bellard | { |
749 | 46d4767d | bellard | bs->translation = translation; |
750 | 46d4767d | bellard | } |
751 | 46d4767d | bellard | |
752 | b338082b | bellard | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
753 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
754 | b338082b | bellard | { |
755 | b338082b | bellard | *pcyls = bs->cyls; |
756 | b338082b | bellard | *pheads = bs->heads; |
757 | b338082b | bellard | *psecs = bs->secs; |
758 | b338082b | bellard | } |
759 | b338082b | bellard | |
760 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
761 | b338082b | bellard | { |
762 | b338082b | bellard | return bs->type;
|
763 | b338082b | bellard | } |
764 | b338082b | bellard | |
765 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
766 | 46d4767d | bellard | { |
767 | 46d4767d | bellard | return bs->translation;
|
768 | 46d4767d | bellard | } |
769 | 46d4767d | bellard | |
770 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
771 | b338082b | bellard | { |
772 | b338082b | bellard | return bs->removable;
|
773 | b338082b | bellard | } |
774 | b338082b | bellard | |
775 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
776 | b338082b | bellard | { |
777 | b338082b | bellard | return bs->read_only;
|
778 | b338082b | bellard | } |
779 | b338082b | bellard | |
780 | 19cb3738 | bellard | /* XXX: no longer used */
|
781 | b338082b | bellard | void bdrv_set_change_cb(BlockDriverState *bs,
|
782 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
783 | b338082b | bellard | { |
784 | b338082b | bellard | bs->change_cb = change_cb; |
785 | b338082b | bellard | bs->change_opaque = opaque; |
786 | b338082b | bellard | } |
787 | b338082b | bellard | |
788 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
789 | ea2384d3 | bellard | { |
790 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
791 | ea2384d3 | bellard | return 1; |
792 | ea2384d3 | bellard | return bs->encrypted;
|
793 | ea2384d3 | bellard | } |
794 | ea2384d3 | bellard | |
795 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
796 | ea2384d3 | bellard | { |
797 | ea2384d3 | bellard | int ret;
|
798 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
799 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
800 | ea2384d3 | bellard | if (ret < 0) |
801 | ea2384d3 | bellard | return ret;
|
802 | ea2384d3 | bellard | if (!bs->encrypted)
|
803 | ea2384d3 | bellard | return 0; |
804 | ea2384d3 | bellard | } |
805 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
806 | ea2384d3 | bellard | return -1; |
807 | ea2384d3 | bellard | return bs->drv->bdrv_set_key(bs, key);
|
808 | ea2384d3 | bellard | } |
809 | ea2384d3 | bellard | |
810 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
811 | ea2384d3 | bellard | { |
812 | 19cb3738 | bellard | if (!bs->drv) {
|
813 | ea2384d3 | bellard | buf[0] = '\0'; |
814 | ea2384d3 | bellard | } else {
|
815 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
816 | ea2384d3 | bellard | } |
817 | ea2384d3 | bellard | } |
818 | ea2384d3 | bellard | |
819 | ea2384d3 | bellard | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
820 | ea2384d3 | bellard | void *opaque)
|
821 | ea2384d3 | bellard | { |
822 | ea2384d3 | bellard | BlockDriver *drv; |
823 | ea2384d3 | bellard | |
824 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
825 | ea2384d3 | bellard | it(opaque, drv->format_name); |
826 | ea2384d3 | bellard | } |
827 | ea2384d3 | bellard | } |
828 | ea2384d3 | bellard | |
829 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
830 | b338082b | bellard | { |
831 | b338082b | bellard | BlockDriverState *bs; |
832 | b338082b | bellard | |
833 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
834 | b338082b | bellard | if (!strcmp(name, bs->device_name))
|
835 | b338082b | bellard | return bs;
|
836 | b338082b | bellard | } |
837 | b338082b | bellard | return NULL; |
838 | b338082b | bellard | } |
839 | b338082b | bellard | |
840 | 81d0912d | bellard | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
841 | 81d0912d | bellard | { |
842 | 81d0912d | bellard | BlockDriverState *bs; |
843 | 81d0912d | bellard | |
844 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
845 | 81d0912d | bellard | it(opaque, bs->device_name); |
846 | 81d0912d | bellard | } |
847 | 81d0912d | bellard | } |
848 | 81d0912d | bellard | |
849 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
850 | ea2384d3 | bellard | { |
851 | ea2384d3 | bellard | return bs->device_name;
|
852 | ea2384d3 | bellard | } |
853 | ea2384d3 | bellard | |
854 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
855 | 7a6cba61 | pbrook | { |
856 | 7a6cba61 | pbrook | if (bs->drv->bdrv_flush)
|
857 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
858 | 7a6cba61 | pbrook | if (bs->backing_hd)
|
859 | 7a6cba61 | pbrook | bdrv_flush(bs->backing_hd); |
860 | 7a6cba61 | pbrook | } |
861 | 7a6cba61 | pbrook | |
862 | b338082b | bellard | void bdrv_info(void) |
863 | b338082b | bellard | { |
864 | b338082b | bellard | BlockDriverState *bs; |
865 | b338082b | bellard | |
866 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
867 | b338082b | bellard | term_printf("%s:", bs->device_name);
|
868 | b338082b | bellard | term_printf(" type=");
|
869 | b338082b | bellard | switch(bs->type) {
|
870 | b338082b | bellard | case BDRV_TYPE_HD:
|
871 | b338082b | bellard | term_printf("hd");
|
872 | b338082b | bellard | break;
|
873 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
874 | b338082b | bellard | term_printf("cdrom");
|
875 | b338082b | bellard | break;
|
876 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
877 | b338082b | bellard | term_printf("floppy");
|
878 | b338082b | bellard | break;
|
879 | b338082b | bellard | } |
880 | b338082b | bellard | term_printf(" removable=%d", bs->removable);
|
881 | b338082b | bellard | if (bs->removable) {
|
882 | b338082b | bellard | term_printf(" locked=%d", bs->locked);
|
883 | b338082b | bellard | } |
884 | 19cb3738 | bellard | if (bs->drv) {
|
885 | fef30743 | ths | term_printf(" file=");
|
886 | fef30743 | ths | term_print_filename(bs->filename); |
887 | fef30743 | ths | if (bs->backing_file[0] != '\0') { |
888 | fef30743 | ths | term_printf(" backing_file=");
|
889 | fef30743 | ths | term_print_filename(bs->backing_file); |
890 | fef30743 | ths | } |
891 | b338082b | bellard | term_printf(" ro=%d", bs->read_only);
|
892 | ea2384d3 | bellard | term_printf(" drv=%s", bs->drv->format_name);
|
893 | ea2384d3 | bellard | if (bs->encrypted)
|
894 | ea2384d3 | bellard | term_printf(" encrypted");
|
895 | b338082b | bellard | } else {
|
896 | b338082b | bellard | term_printf(" [not inserted]");
|
897 | b338082b | bellard | } |
898 | b338082b | bellard | term_printf("\n");
|
899 | b338082b | bellard | } |
900 | b338082b | bellard | } |
901 | ea2384d3 | bellard | |
902 | 83f64091 | bellard | void bdrv_get_backing_filename(BlockDriverState *bs,
|
903 | 83f64091 | bellard | char *filename, int filename_size) |
904 | 83f64091 | bellard | { |
905 | 83f64091 | bellard | if (!bs->backing_hd) {
|
906 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
907 | 83f64091 | bellard | } else {
|
908 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
909 | 83f64091 | bellard | } |
910 | 83f64091 | bellard | } |
911 | 83f64091 | bellard | |
912 | faea38e7 | bellard | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
913 | faea38e7 | bellard | const uint8_t *buf, int nb_sectors) |
914 | faea38e7 | bellard | { |
915 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
916 | faea38e7 | bellard | if (!drv)
|
917 | 19cb3738 | bellard | return -ENOMEDIUM;
|
918 | faea38e7 | bellard | if (!drv->bdrv_write_compressed)
|
919 | faea38e7 | bellard | return -ENOTSUP;
|
920 | faea38e7 | bellard | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
|
921 | faea38e7 | bellard | } |
922 | faea38e7 | bellard | |
923 | faea38e7 | bellard | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
924 | faea38e7 | bellard | { |
925 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
926 | faea38e7 | bellard | if (!drv)
|
927 | 19cb3738 | bellard | return -ENOMEDIUM;
|
928 | faea38e7 | bellard | if (!drv->bdrv_get_info)
|
929 | faea38e7 | bellard | return -ENOTSUP;
|
930 | faea38e7 | bellard | memset(bdi, 0, sizeof(*bdi)); |
931 | faea38e7 | bellard | return drv->bdrv_get_info(bs, bdi);
|
932 | faea38e7 | bellard | } |
933 | faea38e7 | bellard | |
934 | faea38e7 | bellard | /**************************************************************/
|
935 | faea38e7 | bellard | /* handling of snapshots */
|
936 | faea38e7 | bellard | |
937 | faea38e7 | bellard | int bdrv_snapshot_create(BlockDriverState *bs,
|
938 | faea38e7 | bellard | QEMUSnapshotInfo *sn_info) |
939 | faea38e7 | bellard | { |
940 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
941 | faea38e7 | bellard | if (!drv)
|
942 | 19cb3738 | bellard | return -ENOMEDIUM;
|
943 | faea38e7 | bellard | if (!drv->bdrv_snapshot_create)
|
944 | faea38e7 | bellard | return -ENOTSUP;
|
945 | faea38e7 | bellard | return drv->bdrv_snapshot_create(bs, sn_info);
|
946 | faea38e7 | bellard | } |
947 | faea38e7 | bellard | |
948 | faea38e7 | bellard | int bdrv_snapshot_goto(BlockDriverState *bs,
|
949 | faea38e7 | bellard | const char *snapshot_id) |
950 | faea38e7 | bellard | { |
951 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
952 | faea38e7 | bellard | if (!drv)
|
953 | 19cb3738 | bellard | return -ENOMEDIUM;
|
954 | faea38e7 | bellard | if (!drv->bdrv_snapshot_goto)
|
955 | faea38e7 | bellard | return -ENOTSUP;
|
956 | faea38e7 | bellard | return drv->bdrv_snapshot_goto(bs, snapshot_id);
|
957 | faea38e7 | bellard | } |
958 | faea38e7 | bellard | |
959 | faea38e7 | bellard | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
960 | faea38e7 | bellard | { |
961 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
962 | faea38e7 | bellard | if (!drv)
|
963 | 19cb3738 | bellard | return -ENOMEDIUM;
|
964 | faea38e7 | bellard | if (!drv->bdrv_snapshot_delete)
|
965 | faea38e7 | bellard | return -ENOTSUP;
|
966 | faea38e7 | bellard | return drv->bdrv_snapshot_delete(bs, snapshot_id);
|
967 | faea38e7 | bellard | } |
968 | faea38e7 | bellard | |
969 | faea38e7 | bellard | int bdrv_snapshot_list(BlockDriverState *bs,
|
970 | faea38e7 | bellard | QEMUSnapshotInfo **psn_info) |
971 | faea38e7 | bellard | { |
972 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
973 | faea38e7 | bellard | if (!drv)
|
974 | 19cb3738 | bellard | return -ENOMEDIUM;
|
975 | faea38e7 | bellard | if (!drv->bdrv_snapshot_list)
|
976 | faea38e7 | bellard | return -ENOTSUP;
|
977 | faea38e7 | bellard | return drv->bdrv_snapshot_list(bs, psn_info);
|
978 | faea38e7 | bellard | } |
979 | faea38e7 | bellard | |
980 | faea38e7 | bellard | #define NB_SUFFIXES 4 |
981 | faea38e7 | bellard | |
982 | faea38e7 | bellard | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
983 | faea38e7 | bellard | { |
984 | faea38e7 | bellard | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
985 | faea38e7 | bellard | int64_t base; |
986 | faea38e7 | bellard | int i;
|
987 | faea38e7 | bellard | |
988 | faea38e7 | bellard | if (size <= 999) { |
989 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64, size);
|
990 | faea38e7 | bellard | } else {
|
991 | faea38e7 | bellard | base = 1024;
|
992 | faea38e7 | bellard | for(i = 0; i < NB_SUFFIXES; i++) { |
993 | faea38e7 | bellard | if (size < (10 * base)) { |
994 | faea38e7 | bellard | snprintf(buf, buf_size, "%0.1f%c",
|
995 | faea38e7 | bellard | (double)size / base,
|
996 | faea38e7 | bellard | suffixes[i]); |
997 | faea38e7 | bellard | break;
|
998 | faea38e7 | bellard | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
999 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64 "%c", |
1000 | faea38e7 | bellard | ((size + (base >> 1)) / base),
|
1001 | faea38e7 | bellard | suffixes[i]); |
1002 | faea38e7 | bellard | break;
|
1003 | faea38e7 | bellard | } |
1004 | faea38e7 | bellard | base = base * 1024;
|
1005 | faea38e7 | bellard | } |
1006 | faea38e7 | bellard | } |
1007 | faea38e7 | bellard | return buf;
|
1008 | faea38e7 | bellard | } |
1009 | faea38e7 | bellard | |
1010 | faea38e7 | bellard | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
1011 | faea38e7 | bellard | { |
1012 | faea38e7 | bellard | char buf1[128], date_buf[128], clock_buf[128]; |
1013 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1014 | 3b9f94e1 | bellard | struct tm *ptm;
|
1015 | 3b9f94e1 | bellard | #else
|
1016 | faea38e7 | bellard | struct tm tm;
|
1017 | 3b9f94e1 | bellard | #endif
|
1018 | faea38e7 | bellard | time_t ti; |
1019 | faea38e7 | bellard | int64_t secs; |
1020 | faea38e7 | bellard | |
1021 | faea38e7 | bellard | if (!sn) {
|
1022 | faea38e7 | bellard | snprintf(buf, buf_size, |
1023 | faea38e7 | bellard | "%-10s%-20s%7s%20s%15s",
|
1024 | faea38e7 | bellard | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1025 | faea38e7 | bellard | } else {
|
1026 | faea38e7 | bellard | ti = sn->date_sec; |
1027 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1028 | 3b9f94e1 | bellard | ptm = localtime(&ti); |
1029 | 3b9f94e1 | bellard | strftime(date_buf, sizeof(date_buf),
|
1030 | 3b9f94e1 | bellard | "%Y-%m-%d %H:%M:%S", ptm);
|
1031 | 3b9f94e1 | bellard | #else
|
1032 | faea38e7 | bellard | localtime_r(&ti, &tm); |
1033 | faea38e7 | bellard | strftime(date_buf, sizeof(date_buf),
|
1034 | faea38e7 | bellard | "%Y-%m-%d %H:%M:%S", &tm);
|
1035 | 3b9f94e1 | bellard | #endif
|
1036 | faea38e7 | bellard | secs = sn->vm_clock_nsec / 1000000000;
|
1037 | faea38e7 | bellard | snprintf(clock_buf, sizeof(clock_buf),
|
1038 | faea38e7 | bellard | "%02d:%02d:%02d.%03d",
|
1039 | faea38e7 | bellard | (int)(secs / 3600), |
1040 | faea38e7 | bellard | (int)((secs / 60) % 60), |
1041 | faea38e7 | bellard | (int)(secs % 60), |
1042 | faea38e7 | bellard | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1043 | faea38e7 | bellard | snprintf(buf, buf_size, |
1044 | faea38e7 | bellard | "%-10s%-20s%7s%20s%15s",
|
1045 | faea38e7 | bellard | sn->id_str, sn->name, |
1046 | faea38e7 | bellard | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
|
1047 | faea38e7 | bellard | date_buf, |
1048 | faea38e7 | bellard | clock_buf); |
1049 | faea38e7 | bellard | } |
1050 | faea38e7 | bellard | return buf;
|
1051 | faea38e7 | bellard | } |
1052 | faea38e7 | bellard | |
1053 | 83f64091 | bellard | |
1054 | ea2384d3 | bellard | /**************************************************************/
|
1055 | 83f64091 | bellard | /* async I/Os */
|
1056 | ea2384d3 | bellard | |
1057 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1058 | ce1a14dc | pbrook | uint8_t *buf, int nb_sectors,
|
1059 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1060 | 83f64091 | bellard | { |
1061 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1062 | 83f64091 | bellard | |
1063 | 19cb3738 | bellard | if (!drv)
|
1064 | ce1a14dc | pbrook | return NULL; |
1065 | 83f64091 | bellard | |
1066 | 83f64091 | bellard | /* XXX: we assume that nb_sectors == 0 is suppored by the async read */
|
1067 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
1068 | 83f64091 | bellard | memcpy(buf, bs->boot_sector_data, 512);
|
1069 | 83f64091 | bellard | sector_num++; |
1070 | 83f64091 | bellard | nb_sectors--; |
1071 | 83f64091 | bellard | buf += 512;
|
1072 | 83f64091 | bellard | } |
1073 | 83f64091 | bellard | |
1074 | ce1a14dc | pbrook | return drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque);
|
1075 | ea2384d3 | bellard | } |
1076 | ea2384d3 | bellard | |
1077 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1078 | ce1a14dc | pbrook | const uint8_t *buf, int nb_sectors, |
1079 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1080 | ea2384d3 | bellard | { |
1081 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1082 | ea2384d3 | bellard | |
1083 | 19cb3738 | bellard | if (!drv)
|
1084 | ce1a14dc | pbrook | return NULL; |
1085 | 83f64091 | bellard | if (bs->read_only)
|
1086 | ce1a14dc | pbrook | return NULL; |
1087 | 83f64091 | bellard | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
1088 | 83f64091 | bellard | memcpy(bs->boot_sector_data, buf, 512);
|
1089 | ea2384d3 | bellard | } |
1090 | 83f64091 | bellard | |
1091 | ce1a14dc | pbrook | return drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque);
|
1092 | 83f64091 | bellard | } |
1093 | 83f64091 | bellard | |
1094 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
1095 | 83f64091 | bellard | { |
1096 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1097 | 83f64091 | bellard | |
1098 | ce1a14dc | pbrook | drv->bdrv_aio_cancel(acb); |
1099 | 83f64091 | bellard | } |
1100 | 83f64091 | bellard | |
1101 | ce1a14dc | pbrook | |
1102 | 83f64091 | bellard | /**************************************************************/
|
1103 | 83f64091 | bellard | /* async block device emulation */
|
1104 | 83f64091 | bellard | |
1105 | 83f64091 | bellard | #ifdef QEMU_TOOL
|
1106 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
|
1107 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
1108 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1109 | ea2384d3 | bellard | { |
1110 | ea2384d3 | bellard | int ret;
|
1111 | ce1a14dc | pbrook | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
1112 | ce1a14dc | pbrook | cb(opaque, ret); |
1113 | ce1a14dc | pbrook | return NULL; |
1114 | ea2384d3 | bellard | } |
1115 | ea2384d3 | bellard | |
1116 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
|
1117 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
1118 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1119 | ea2384d3 | bellard | { |
1120 | ea2384d3 | bellard | int ret;
|
1121 | ce1a14dc | pbrook | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
1122 | ce1a14dc | pbrook | cb(opaque, ret); |
1123 | ce1a14dc | pbrook | return NULL; |
1124 | ea2384d3 | bellard | } |
1125 | ea2384d3 | bellard | |
1126 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb) |
1127 | ea2384d3 | bellard | { |
1128 | ea2384d3 | bellard | } |
1129 | 83f64091 | bellard | #else
|
1130 | ce1a14dc | pbrook | static void bdrv_aio_bh_cb(void *opaque) |
1131 | 83f64091 | bellard | { |
1132 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = opaque; |
1133 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, acb->ret); |
1134 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1135 | 83f64091 | bellard | } |
1136 | beac80cd | bellard | |
1137 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
|
1138 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
1139 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1140 | 83f64091 | bellard | { |
1141 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1142 | 83f64091 | bellard | int ret;
|
1143 | ce1a14dc | pbrook | |
1144 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1145 | ce1a14dc | pbrook | if (!acb->bh)
|
1146 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1147 | ce1a14dc | pbrook | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
1148 | ce1a14dc | pbrook | acb->ret = ret; |
1149 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1150 | ce1a14dc | pbrook | return &acb->common;
|
1151 | beac80cd | bellard | } |
1152 | beac80cd | bellard | |
1153 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
|
1154 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
1155 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1156 | beac80cd | bellard | { |
1157 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1158 | 83f64091 | bellard | int ret;
|
1159 | 83f64091 | bellard | |
1160 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1161 | ce1a14dc | pbrook | if (!acb->bh)
|
1162 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1163 | ce1a14dc | pbrook | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
1164 | ce1a14dc | pbrook | acb->ret = ret; |
1165 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1166 | ce1a14dc | pbrook | return &acb->common;
|
1167 | beac80cd | bellard | } |
1168 | beac80cd | bellard | |
1169 | ce1a14dc | pbrook | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
1170 | ea2384d3 | bellard | { |
1171 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1172 | ce1a14dc | pbrook | qemu_bh_cancel(acb->bh); |
1173 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1174 | 83f64091 | bellard | } |
1175 | 83f64091 | bellard | #endif /* !QEMU_TOOL */ |
1176 | ea2384d3 | bellard | |
1177 | 83f64091 | bellard | /**************************************************************/
|
1178 | 83f64091 | bellard | /* sync block device emulation */
|
1179 | ea2384d3 | bellard | |
1180 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
1181 | 83f64091 | bellard | { |
1182 | 83f64091 | bellard | *(int *)opaque = ret;
|
1183 | ea2384d3 | bellard | } |
1184 | ea2384d3 | bellard | |
1185 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
1186 | 83f64091 | bellard | |
1187 | 83f64091 | bellard | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
1188 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1189 | 7a6cba61 | pbrook | { |
1190 | ce1a14dc | pbrook | int async_ret;
|
1191 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1192 | 83f64091 | bellard | |
1193 | 83f64091 | bellard | async_ret = NOT_DONE; |
1194 | 83f64091 | bellard | qemu_aio_wait_start(); |
1195 | ce1a14dc | pbrook | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
1196 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1197 | ce1a14dc | pbrook | if (acb == NULL) { |
1198 | 83f64091 | bellard | qemu_aio_wait_end(); |
1199 | ce1a14dc | pbrook | return -1; |
1200 | 83f64091 | bellard | } |
1201 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1202 | 83f64091 | bellard | qemu_aio_wait(); |
1203 | 83f64091 | bellard | } |
1204 | 83f64091 | bellard | qemu_aio_wait_end(); |
1205 | 83f64091 | bellard | return async_ret;
|
1206 | 7a6cba61 | pbrook | } |
1207 | 7a6cba61 | pbrook | |
1208 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1209 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1210 | 83f64091 | bellard | { |
1211 | ce1a14dc | pbrook | int async_ret;
|
1212 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1213 | 83f64091 | bellard | |
1214 | 83f64091 | bellard | async_ret = NOT_DONE; |
1215 | 83f64091 | bellard | qemu_aio_wait_start(); |
1216 | ce1a14dc | pbrook | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
1217 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1218 | ce1a14dc | pbrook | if (acb == NULL) { |
1219 | 83f64091 | bellard | qemu_aio_wait_end(); |
1220 | ce1a14dc | pbrook | return -1; |
1221 | 83f64091 | bellard | } |
1222 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1223 | 83f64091 | bellard | qemu_aio_wait(); |
1224 | 83f64091 | bellard | } |
1225 | 83f64091 | bellard | qemu_aio_wait_end(); |
1226 | 83f64091 | bellard | return async_ret;
|
1227 | 83f64091 | bellard | } |
1228 | ea2384d3 | bellard | |
1229 | ea2384d3 | bellard | void bdrv_init(void) |
1230 | ea2384d3 | bellard | { |
1231 | ea2384d3 | bellard | bdrv_register(&bdrv_raw); |
1232 | 19cb3738 | bellard | bdrv_register(&bdrv_host_device); |
1233 | ea2384d3 | bellard | #ifndef _WIN32
|
1234 | ea2384d3 | bellard | bdrv_register(&bdrv_cow); |
1235 | ea2384d3 | bellard | #endif
|
1236 | ea2384d3 | bellard | bdrv_register(&bdrv_qcow); |
1237 | ea2384d3 | bellard | bdrv_register(&bdrv_vmdk); |
1238 | 3c56521b | bellard | bdrv_register(&bdrv_cloop); |
1239 | 585d0ed9 | bellard | bdrv_register(&bdrv_dmg); |
1240 | a8753c34 | bellard | bdrv_register(&bdrv_bochs); |
1241 | 6a0f9e82 | bellard | bdrv_register(&bdrv_vpc); |
1242 | 712e7874 | bellard | bdrv_register(&bdrv_vvfat); |
1243 | faea38e7 | bellard | bdrv_register(&bdrv_qcow2); |
1244 | ea2384d3 | bellard | } |
1245 | ce1a14dc | pbrook | |
1246 | ce1a14dc | pbrook | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
|
1247 | ce1a14dc | pbrook | void *opaque)
|
1248 | ce1a14dc | pbrook | { |
1249 | ce1a14dc | pbrook | BlockDriver *drv; |
1250 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1251 | ce1a14dc | pbrook | |
1252 | ce1a14dc | pbrook | drv = bs->drv; |
1253 | ce1a14dc | pbrook | if (drv->free_aiocb) {
|
1254 | ce1a14dc | pbrook | acb = drv->free_aiocb; |
1255 | ce1a14dc | pbrook | drv->free_aiocb = acb->next; |
1256 | ce1a14dc | pbrook | } else {
|
1257 | ce1a14dc | pbrook | acb = qemu_mallocz(drv->aiocb_size); |
1258 | ce1a14dc | pbrook | if (!acb)
|
1259 | ce1a14dc | pbrook | return NULL; |
1260 | ce1a14dc | pbrook | } |
1261 | ce1a14dc | pbrook | acb->bs = bs; |
1262 | ce1a14dc | pbrook | acb->cb = cb; |
1263 | ce1a14dc | pbrook | acb->opaque = opaque; |
1264 | ce1a14dc | pbrook | return acb;
|
1265 | ce1a14dc | pbrook | } |
1266 | ce1a14dc | pbrook | |
1267 | ce1a14dc | pbrook | void qemu_aio_release(void *p) |
1268 | ce1a14dc | pbrook | { |
1269 | ce1a14dc | pbrook | BlockDriverAIOCB *acb = p; |
1270 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1271 | ce1a14dc | pbrook | acb->next = drv->free_aiocb; |
1272 | ce1a14dc | pbrook | drv->free_aiocb = acb; |
1273 | ce1a14dc | pbrook | } |
1274 | 19cb3738 | bellard | |
1275 | 19cb3738 | bellard | /**************************************************************/
|
1276 | 19cb3738 | bellard | /* removable device support */
|
1277 | 19cb3738 | bellard | |
1278 | 19cb3738 | bellard | /**
|
1279 | 19cb3738 | bellard | * Return TRUE if the media is present
|
1280 | 19cb3738 | bellard | */
|
1281 | 19cb3738 | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
1282 | 19cb3738 | bellard | { |
1283 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1284 | 19cb3738 | bellard | int ret;
|
1285 | 19cb3738 | bellard | if (!drv)
|
1286 | 19cb3738 | bellard | return 0; |
1287 | 19cb3738 | bellard | if (!drv->bdrv_is_inserted)
|
1288 | 19cb3738 | bellard | return 1; |
1289 | 19cb3738 | bellard | ret = drv->bdrv_is_inserted(bs); |
1290 | 19cb3738 | bellard | return ret;
|
1291 | 19cb3738 | bellard | } |
1292 | 19cb3738 | bellard | |
1293 | 19cb3738 | bellard | /**
|
1294 | 19cb3738 | bellard | * Return TRUE if the media changed since the last call to this
|
1295 | 19cb3738 | bellard | * function. It is currently only used for floppy disks
|
1296 | 19cb3738 | bellard | */
|
1297 | 19cb3738 | bellard | int bdrv_media_changed(BlockDriverState *bs)
|
1298 | 19cb3738 | bellard | { |
1299 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1300 | 19cb3738 | bellard | int ret;
|
1301 | 19cb3738 | bellard | |
1302 | 19cb3738 | bellard | if (!drv || !drv->bdrv_media_changed)
|
1303 | 19cb3738 | bellard | ret = -ENOTSUP; |
1304 | 19cb3738 | bellard | else
|
1305 | 19cb3738 | bellard | ret = drv->bdrv_media_changed(bs); |
1306 | 19cb3738 | bellard | if (ret == -ENOTSUP)
|
1307 | 19cb3738 | bellard | ret = bs->media_changed; |
1308 | 19cb3738 | bellard | bs->media_changed = 0;
|
1309 | 19cb3738 | bellard | return ret;
|
1310 | 19cb3738 | bellard | } |
1311 | 19cb3738 | bellard | |
1312 | 19cb3738 | bellard | /**
|
1313 | 19cb3738 | bellard | * If eject_flag is TRUE, eject the media. Otherwise, close the tray
|
1314 | 19cb3738 | bellard | */
|
1315 | 19cb3738 | bellard | void bdrv_eject(BlockDriverState *bs, int eject_flag) |
1316 | 19cb3738 | bellard | { |
1317 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1318 | 19cb3738 | bellard | int ret;
|
1319 | 19cb3738 | bellard | |
1320 | 19cb3738 | bellard | if (!drv || !drv->bdrv_eject) {
|
1321 | 19cb3738 | bellard | ret = -ENOTSUP; |
1322 | 19cb3738 | bellard | } else {
|
1323 | 19cb3738 | bellard | ret = drv->bdrv_eject(bs, eject_flag); |
1324 | 19cb3738 | bellard | } |
1325 | 19cb3738 | bellard | if (ret == -ENOTSUP) {
|
1326 | 19cb3738 | bellard | if (eject_flag)
|
1327 | 19cb3738 | bellard | bdrv_close(bs); |
1328 | 19cb3738 | bellard | } |
1329 | 19cb3738 | bellard | } |
1330 | 19cb3738 | bellard | |
1331 | 19cb3738 | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
1332 | 19cb3738 | bellard | { |
1333 | 19cb3738 | bellard | return bs->locked;
|
1334 | 19cb3738 | bellard | } |
1335 | 19cb3738 | bellard | |
1336 | 19cb3738 | bellard | /**
|
1337 | 19cb3738 | bellard | * Lock or unlock the media (if it is locked, the user won't be able
|
1338 | 19cb3738 | bellard | * to eject it manually).
|
1339 | 19cb3738 | bellard | */
|
1340 | 19cb3738 | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
1341 | 19cb3738 | bellard | { |
1342 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1343 | 19cb3738 | bellard | |
1344 | 19cb3738 | bellard | bs->locked = locked; |
1345 | 19cb3738 | bellard | if (drv && drv->bdrv_set_locked) {
|
1346 | 19cb3738 | bellard | drv->bdrv_set_locked(bs, locked); |
1347 | 19cb3738 | bellard | } |
1348 | 19cb3738 | bellard | } |