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1 | fc01f7e7 | bellard | /*
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2 | fc01f7e7 | bellard | * QEMU System Emulator block driver
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3 | 5fafdf24 | ths | *
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4 | fc01f7e7 | bellard | * Copyright (c) 2003 Fabrice Bellard
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5 | 5fafdf24 | ths | *
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6 | fc01f7e7 | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | fc01f7e7 | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | fc01f7e7 | bellard | * in the Software without restriction, including without limitation the rights
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9 | fc01f7e7 | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | fc01f7e7 | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | fc01f7e7 | bellard | * furnished to do so, subject to the following conditions:
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12 | fc01f7e7 | bellard | *
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13 | fc01f7e7 | bellard | * The above copyright notice and this permission notice shall be included in
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14 | fc01f7e7 | bellard | * all copies or substantial portions of the Software.
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15 | fc01f7e7 | bellard | *
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16 | fc01f7e7 | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | fc01f7e7 | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | fc01f7e7 | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | fc01f7e7 | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | fc01f7e7 | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | fc01f7e7 | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | fc01f7e7 | bellard | * THE SOFTWARE.
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23 | fc01f7e7 | bellard | */
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24 | 3990d09a | blueswir1 | #include "config-host.h" |
25 | 3990d09a | blueswir1 | #ifdef _BSD
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26 | 3990d09a | blueswir1 | /* include native header before sys-queue.h */
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27 | 3990d09a | blueswir1 | #include <sys/queue.h> |
28 | 3990d09a | blueswir1 | #endif
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29 | 3990d09a | blueswir1 | |
30 | faf07963 | pbrook | #include "qemu-common.h" |
31 | 87ecb68b | pbrook | #include "console.h" |
32 | ea2384d3 | bellard | #include "block_int.h" |
33 | fc01f7e7 | bellard | |
34 | 7674e7bf | bellard | #ifdef _BSD
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35 | 7674e7bf | bellard | #include <sys/types.h> |
36 | 7674e7bf | bellard | #include <sys/stat.h> |
37 | 7674e7bf | bellard | #include <sys/ioctl.h> |
38 | 7674e7bf | bellard | #include <sys/disk.h> |
39 | 7674e7bf | bellard | #endif
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40 | 7674e7bf | bellard | |
41 | 83f64091 | bellard | #define SECTOR_BITS 9 |
42 | 83f64091 | bellard | #define SECTOR_SIZE (1 << SECTOR_BITS) |
43 | 83f64091 | bellard | |
44 | 90765429 | bellard | typedef struct BlockDriverAIOCBSync { |
45 | 90765429 | bellard | BlockDriverAIOCB common; |
46 | 90765429 | bellard | QEMUBH *bh; |
47 | 90765429 | bellard | int ret;
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48 | 90765429 | bellard | } BlockDriverAIOCBSync; |
49 | 90765429 | bellard | |
50 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
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51 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
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52 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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53 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
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54 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
55 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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56 | 83f64091 | bellard | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
57 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
58 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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59 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
60 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
61 | ec530c81 | bellard | |
62 | 7ee930d0 | blueswir1 | BlockDriverState *bdrv_first; |
63 | 7ee930d0 | blueswir1 | |
64 | ea2384d3 | bellard | static BlockDriver *first_drv;
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65 | ea2384d3 | bellard | |
66 | 83f64091 | bellard | int path_is_absolute(const char *path) |
67 | 3b0d4f61 | bellard | { |
68 | 83f64091 | bellard | const char *p; |
69 | 21664424 | bellard | #ifdef _WIN32
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70 | 21664424 | bellard | /* specific case for names like: "\\.\d:" */
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71 | 21664424 | bellard | if (*path == '/' || *path == '\\') |
72 | 21664424 | bellard | return 1; |
73 | 21664424 | bellard | #endif
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74 | 83f64091 | bellard | p = strchr(path, ':');
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75 | 83f64091 | bellard | if (p)
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76 | 83f64091 | bellard | p++; |
77 | 83f64091 | bellard | else
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78 | 83f64091 | bellard | p = path; |
79 | 3b9f94e1 | bellard | #ifdef _WIN32
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80 | 3b9f94e1 | bellard | return (*p == '/' || *p == '\\'); |
81 | 3b9f94e1 | bellard | #else
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82 | 3b9f94e1 | bellard | return (*p == '/'); |
83 | 3b9f94e1 | bellard | #endif
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84 | 3b0d4f61 | bellard | } |
85 | 3b0d4f61 | bellard | |
86 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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87 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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88 | 83f64091 | bellard | supported. */
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89 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
90 | 83f64091 | bellard | const char *base_path, |
91 | 83f64091 | bellard | const char *filename) |
92 | 3b0d4f61 | bellard | { |
93 | 83f64091 | bellard | const char *p, *p1; |
94 | 83f64091 | bellard | int len;
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95 | 83f64091 | bellard | |
96 | 83f64091 | bellard | if (dest_size <= 0) |
97 | 83f64091 | bellard | return;
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98 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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99 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
100 | 83f64091 | bellard | } else {
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101 | 83f64091 | bellard | p = strchr(base_path, ':');
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102 | 83f64091 | bellard | if (p)
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103 | 83f64091 | bellard | p++; |
104 | 83f64091 | bellard | else
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105 | 83f64091 | bellard | p = base_path; |
106 | 3b9f94e1 | bellard | p1 = strrchr(base_path, '/');
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107 | 3b9f94e1 | bellard | #ifdef _WIN32
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108 | 3b9f94e1 | bellard | { |
109 | 3b9f94e1 | bellard | const char *p2; |
110 | 3b9f94e1 | bellard | p2 = strrchr(base_path, '\\');
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111 | 3b9f94e1 | bellard | if (!p1 || p2 > p1)
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112 | 3b9f94e1 | bellard | p1 = p2; |
113 | 3b9f94e1 | bellard | } |
114 | 3b9f94e1 | bellard | #endif
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115 | 83f64091 | bellard | if (p1)
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116 | 83f64091 | bellard | p1++; |
117 | 83f64091 | bellard | else
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118 | 83f64091 | bellard | p1 = base_path; |
119 | 83f64091 | bellard | if (p1 > p)
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120 | 83f64091 | bellard | p = p1; |
121 | 83f64091 | bellard | len = p - base_path; |
122 | 83f64091 | bellard | if (len > dest_size - 1) |
123 | 83f64091 | bellard | len = dest_size - 1;
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124 | 83f64091 | bellard | memcpy(dest, base_path, len); |
125 | 83f64091 | bellard | dest[len] = '\0';
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126 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
127 | 3b0d4f61 | bellard | } |
128 | 3b0d4f61 | bellard | } |
129 | 3b0d4f61 | bellard | |
130 | 3b0d4f61 | bellard | |
131 | 9596ebb7 | pbrook | static void bdrv_register(BlockDriver *bdrv) |
132 | ea2384d3 | bellard | { |
133 | ce1a14dc | pbrook | if (!bdrv->bdrv_aio_read) {
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134 | 83f64091 | bellard | /* add AIO emulation layer */
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135 | 83f64091 | bellard | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
136 | 83f64091 | bellard | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
137 | 83f64091 | bellard | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
138 | 90765429 | bellard | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync);
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139 | 83f64091 | bellard | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
140 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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141 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
142 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
143 | 83f64091 | bellard | } |
144 | ea2384d3 | bellard | bdrv->next = first_drv; |
145 | ea2384d3 | bellard | first_drv = bdrv; |
146 | ea2384d3 | bellard | } |
147 | b338082b | bellard | |
148 | b338082b | bellard | /* create a new block device (by default it is empty) */
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149 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
150 | b338082b | bellard | { |
151 | b338082b | bellard | BlockDriverState **pbs, *bs; |
152 | b338082b | bellard | |
153 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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154 | b338082b | bellard | if(!bs)
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155 | b338082b | bellard | return NULL; |
156 | b338082b | bellard | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
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157 | ea2384d3 | bellard | if (device_name[0] != '\0') { |
158 | ea2384d3 | bellard | /* insert at the end */
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159 | ea2384d3 | bellard | pbs = &bdrv_first; |
160 | ea2384d3 | bellard | while (*pbs != NULL) |
161 | ea2384d3 | bellard | pbs = &(*pbs)->next; |
162 | ea2384d3 | bellard | *pbs = bs; |
163 | ea2384d3 | bellard | } |
164 | b338082b | bellard | return bs;
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165 | b338082b | bellard | } |
166 | b338082b | bellard | |
167 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
168 | ea2384d3 | bellard | { |
169 | ea2384d3 | bellard | BlockDriver *drv1; |
170 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
171 | ea2384d3 | bellard | if (!strcmp(drv1->format_name, format_name))
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172 | ea2384d3 | bellard | return drv1;
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173 | ea2384d3 | bellard | } |
174 | ea2384d3 | bellard | return NULL; |
175 | ea2384d3 | bellard | } |
176 | ea2384d3 | bellard | |
177 | 5fafdf24 | ths | int bdrv_create(BlockDriver *drv,
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178 | ea2384d3 | bellard | const char *filename, int64_t size_in_sectors, |
179 | ea2384d3 | bellard | const char *backing_file, int flags) |
180 | ea2384d3 | bellard | { |
181 | ea2384d3 | bellard | if (!drv->bdrv_create)
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182 | ea2384d3 | bellard | return -ENOTSUP;
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183 | ea2384d3 | bellard | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
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184 | ea2384d3 | bellard | } |
185 | ea2384d3 | bellard | |
186 | d5249393 | bellard | #ifdef _WIN32
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187 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
188 | d5249393 | bellard | { |
189 | 3b9f94e1 | bellard | char temp_dir[MAX_PATH];
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190 | 3b46e624 | ths | |
191 | 3b9f94e1 | bellard | GetTempPath(MAX_PATH, temp_dir); |
192 | 3b9f94e1 | bellard | GetTempFileName(temp_dir, "qem", 0, filename); |
193 | d5249393 | bellard | } |
194 | d5249393 | bellard | #else
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195 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
196 | fc01f7e7 | bellard | { |
197 | 67b915a5 | bellard | int fd;
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198 | 7ccfb2eb | blueswir1 | const char *tmpdir; |
199 | d5249393 | bellard | /* XXX: race condition possible */
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200 | 0badc1ee | aurel32 | tmpdir = getenv("TMPDIR");
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201 | 0badc1ee | aurel32 | if (!tmpdir)
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202 | 0badc1ee | aurel32 | tmpdir = "/tmp";
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203 | 0badc1ee | aurel32 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir);
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204 | ea2384d3 | bellard | fd = mkstemp(filename); |
205 | ea2384d3 | bellard | close(fd); |
206 | ea2384d3 | bellard | } |
207 | d5249393 | bellard | #endif
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208 | fc01f7e7 | bellard | |
209 | 19cb3738 | bellard | #ifdef _WIN32
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210 | f45512fe | bellard | static int is_windows_drive_prefix(const char *filename) |
211 | f45512fe | bellard | { |
212 | f45512fe | bellard | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
213 | f45512fe | bellard | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
214 | f45512fe | bellard | filename[1] == ':'); |
215 | f45512fe | bellard | } |
216 | 3b46e624 | ths | |
217 | 19cb3738 | bellard | static int is_windows_drive(const char *filename) |
218 | 19cb3738 | bellard | { |
219 | 5fafdf24 | ths | if (is_windows_drive_prefix(filename) &&
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220 | f45512fe | bellard | filename[2] == '\0') |
221 | 19cb3738 | bellard | return 1; |
222 | 19cb3738 | bellard | if (strstart(filename, "\\\\.\\", NULL) || |
223 | 19cb3738 | bellard | strstart(filename, "//./", NULL)) |
224 | 19cb3738 | bellard | return 1; |
225 | 19cb3738 | bellard | return 0; |
226 | 19cb3738 | bellard | } |
227 | 19cb3738 | bellard | #endif
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228 | 19cb3738 | bellard | |
229 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
230 | 83f64091 | bellard | { |
231 | 83f64091 | bellard | BlockDriver *drv1; |
232 | 83f64091 | bellard | char protocol[128]; |
233 | 83f64091 | bellard | int len;
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234 | 83f64091 | bellard | const char *p; |
235 | 19cb3738 | bellard | |
236 | 19cb3738 | bellard | #ifdef _WIN32
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237 | f45512fe | bellard | if (is_windows_drive(filename) ||
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238 | f45512fe | bellard | is_windows_drive_prefix(filename)) |
239 | 19cb3738 | bellard | return &bdrv_raw;
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240 | 19cb3738 | bellard | #endif
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241 | 83f64091 | bellard | p = strchr(filename, ':');
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242 | 83f64091 | bellard | if (!p)
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243 | 83f64091 | bellard | return &bdrv_raw;
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244 | 83f64091 | bellard | len = p - filename; |
245 | 83f64091 | bellard | if (len > sizeof(protocol) - 1) |
246 | 83f64091 | bellard | len = sizeof(protocol) - 1; |
247 | 83f64091 | bellard | memcpy(protocol, filename, len); |
248 | 83f64091 | bellard | protocol[len] = '\0';
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249 | 83f64091 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
250 | 5fafdf24 | ths | if (drv1->protocol_name &&
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251 | 83f64091 | bellard | !strcmp(drv1->protocol_name, protocol)) |
252 | 83f64091 | bellard | return drv1;
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253 | 83f64091 | bellard | } |
254 | 83f64091 | bellard | return NULL; |
255 | 83f64091 | bellard | } |
256 | 83f64091 | bellard | |
257 | 7674e7bf | bellard | /* XXX: force raw format if block or character device ? It would
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258 | 7674e7bf | bellard | simplify the BSD case */
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259 | ea2384d3 | bellard | static BlockDriver *find_image_format(const char *filename) |
260 | ea2384d3 | bellard | { |
261 | 83f64091 | bellard | int ret, score, score_max;
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262 | ea2384d3 | bellard | BlockDriver *drv1, *drv; |
263 | 83f64091 | bellard | uint8_t buf[2048];
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264 | 83f64091 | bellard | BlockDriverState *bs; |
265 | 3b46e624 | ths | |
266 | 19cb3738 | bellard | /* detect host devices. By convention, /dev/cdrom[N] is always
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267 | 19cb3738 | bellard | recognized as a host CDROM */
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268 | 19cb3738 | bellard | if (strstart(filename, "/dev/cdrom", NULL)) |
269 | 19cb3738 | bellard | return &bdrv_host_device;
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270 | 19cb3738 | bellard | #ifdef _WIN32
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271 | 19cb3738 | bellard | if (is_windows_drive(filename))
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272 | 19cb3738 | bellard | return &bdrv_host_device;
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273 | 19cb3738 | bellard | #else
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274 | 19cb3738 | bellard | { |
275 | 19cb3738 | bellard | struct stat st;
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276 | 5fafdf24 | ths | if (stat(filename, &st) >= 0 && |
277 | 19cb3738 | bellard | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
278 | 19cb3738 | bellard | return &bdrv_host_device;
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279 | 19cb3738 | bellard | } |
280 | 19cb3738 | bellard | } |
281 | 19cb3738 | bellard | #endif
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282 | 3b46e624 | ths | |
283 | 83f64091 | bellard | drv = find_protocol(filename); |
284 | 19cb3738 | bellard | /* no need to test disk image formats for vvfat */
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285 | 83f64091 | bellard | if (drv == &bdrv_vvfat)
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286 | 83f64091 | bellard | return drv;
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287 | 19cb3738 | bellard | |
288 | 83f64091 | bellard | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
289 | 83f64091 | bellard | if (ret < 0) |
290 | 83f64091 | bellard | return NULL; |
291 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
292 | 83f64091 | bellard | bdrv_delete(bs); |
293 | 83f64091 | bellard | if (ret < 0) { |
294 | 83f64091 | bellard | return NULL; |
295 | 83f64091 | bellard | } |
296 | 83f64091 | bellard | |
297 | ea2384d3 | bellard | score_max = 0;
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298 | ea2384d3 | bellard | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
299 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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300 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
301 | 83f64091 | bellard | if (score > score_max) {
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302 | 83f64091 | bellard | score_max = score; |
303 | 83f64091 | bellard | drv = drv1; |
304 | 83f64091 | bellard | } |
305 | 0849bf08 | bellard | } |
306 | fc01f7e7 | bellard | } |
307 | ea2384d3 | bellard | return drv;
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308 | ea2384d3 | bellard | } |
309 | ea2384d3 | bellard | |
310 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
311 | ea2384d3 | bellard | { |
312 | 83f64091 | bellard | BlockDriverState *bs; |
313 | 83f64091 | bellard | int ret;
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314 | 83f64091 | bellard | |
315 | 83f64091 | bellard | bs = bdrv_new("");
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316 | 83f64091 | bellard | if (!bs)
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317 | 83f64091 | bellard | return -ENOMEM;
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318 | 83f64091 | bellard | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
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319 | 83f64091 | bellard | if (ret < 0) { |
320 | 83f64091 | bellard | bdrv_delete(bs); |
321 | 83f64091 | bellard | return ret;
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322 | 3b0d4f61 | bellard | } |
323 | 83f64091 | bellard | *pbs = bs; |
324 | 83f64091 | bellard | return 0; |
325 | 83f64091 | bellard | } |
326 | 83f64091 | bellard | |
327 | 83f64091 | bellard | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
328 | 83f64091 | bellard | { |
329 | 83f64091 | bellard | return bdrv_open2(bs, filename, flags, NULL); |
330 | ea2384d3 | bellard | } |
331 | ea2384d3 | bellard | |
332 | 83f64091 | bellard | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
333 | ea2384d3 | bellard | BlockDriver *drv) |
334 | ea2384d3 | bellard | { |
335 | 83f64091 | bellard | int ret, open_flags;
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336 | eb5c851f | ths | char tmp_filename[PATH_MAX];
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337 | eb5c851f | ths | char backing_filename[PATH_MAX];
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338 | 3b46e624 | ths | |
339 | ea2384d3 | bellard | bs->read_only = 0;
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340 | ea2384d3 | bellard | bs->is_temporary = 0;
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341 | ea2384d3 | bellard | bs->encrypted = 0;
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342 | 712e7874 | bellard | |
343 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
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344 | ea2384d3 | bellard | BlockDriverState *bs1; |
345 | ea2384d3 | bellard | int64_t total_size; |
346 | 7c96d46e | aliguori | int is_protocol = 0; |
347 | 3b46e624 | ths | |
348 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
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349 | ea2384d3 | bellard | instead of opening 'filename' directly */
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350 | 33e3963e | bellard | |
351 | ea2384d3 | bellard | /* if there is a backing file, use it */
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352 | ea2384d3 | bellard | bs1 = bdrv_new("");
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353 | ea2384d3 | bellard | if (!bs1) {
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354 | 83f64091 | bellard | return -ENOMEM;
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355 | ea2384d3 | bellard | } |
356 | ea2384d3 | bellard | if (bdrv_open(bs1, filename, 0) < 0) { |
357 | ea2384d3 | bellard | bdrv_delete(bs1); |
358 | ea2384d3 | bellard | return -1; |
359 | ea2384d3 | bellard | } |
360 | 83f64091 | bellard | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
361 | 7c96d46e | aliguori | |
362 | 7c96d46e | aliguori | if (bs1->drv && bs1->drv->protocol_name)
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363 | 7c96d46e | aliguori | is_protocol = 1;
|
364 | 7c96d46e | aliguori | |
365 | ea2384d3 | bellard | bdrv_delete(bs1); |
366 | 3b46e624 | ths | |
367 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
|
368 | 7c96d46e | aliguori | |
369 | 7c96d46e | aliguori | /* Real path is meaningless for protocols */
|
370 | 7c96d46e | aliguori | if (is_protocol)
|
371 | 7c96d46e | aliguori | snprintf(backing_filename, sizeof(backing_filename),
|
372 | 7c96d46e | aliguori | "%s", filename);
|
373 | 7c96d46e | aliguori | else
|
374 | 7c96d46e | aliguori | realpath(filename, backing_filename); |
375 | 7c96d46e | aliguori | |
376 | 5fafdf24 | ths | if (bdrv_create(&bdrv_qcow2, tmp_filename,
|
377 | a817d936 | bellard | total_size, backing_filename, 0) < 0) { |
378 | ea2384d3 | bellard | return -1; |
379 | ea2384d3 | bellard | } |
380 | ea2384d3 | bellard | filename = tmp_filename; |
381 | ea2384d3 | bellard | bs->is_temporary = 1;
|
382 | ea2384d3 | bellard | } |
383 | 712e7874 | bellard | |
384 | ea2384d3 | bellard | pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
385 | 83f64091 | bellard | if (flags & BDRV_O_FILE) {
|
386 | 83f64091 | bellard | drv = find_protocol(filename); |
387 | ea2384d3 | bellard | if (!drv)
|
388 | 83f64091 | bellard | return -ENOENT;
|
389 | 83f64091 | bellard | } else {
|
390 | 83f64091 | bellard | if (!drv) {
|
391 | 83f64091 | bellard | drv = find_image_format(filename); |
392 | 83f64091 | bellard | if (!drv)
|
393 | 83f64091 | bellard | return -1; |
394 | 83f64091 | bellard | } |
395 | ea2384d3 | bellard | } |
396 | ea2384d3 | bellard | bs->drv = drv; |
397 | ea2384d3 | bellard | bs->opaque = qemu_mallocz(drv->instance_size); |
398 | ea2384d3 | bellard | if (bs->opaque == NULL && drv->instance_size > 0) |
399 | ea2384d3 | bellard | return -1; |
400 | 83f64091 | bellard | /* Note: for compatibility, we open disk image files as RDWR, and
|
401 | 83f64091 | bellard | RDONLY as fallback */
|
402 | 83f64091 | bellard | if (!(flags & BDRV_O_FILE))
|
403 | 9f7965c7 | aliguori | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
404 | 83f64091 | bellard | else
|
405 | 83f64091 | bellard | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
406 | 83f64091 | bellard | ret = drv->bdrv_open(bs, filename, open_flags); |
407 | a0a83536 | aurel32 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) {
|
408 | 9f7965c7 | aliguori | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
409 | 83f64091 | bellard | bs->read_only = 1;
|
410 | 83f64091 | bellard | } |
411 | ea2384d3 | bellard | if (ret < 0) { |
412 | ea2384d3 | bellard | qemu_free(bs->opaque); |
413 | 6b21b973 | bellard | bs->opaque = NULL;
|
414 | 6b21b973 | bellard | bs->drv = NULL;
|
415 | 83f64091 | bellard | return ret;
|
416 | 33e3963e | bellard | } |
417 | d15a771d | bellard | if (drv->bdrv_getlength) {
|
418 | d15a771d | bellard | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
419 | d15a771d | bellard | } |
420 | 67b915a5 | bellard | #ifndef _WIN32
|
421 | ea2384d3 | bellard | if (bs->is_temporary) {
|
422 | ea2384d3 | bellard | unlink(filename); |
423 | ea2384d3 | bellard | } |
424 | ea2384d3 | bellard | #endif
|
425 | 83f64091 | bellard | if (bs->backing_file[0] != '\0') { |
426 | ea2384d3 | bellard | /* if there is a backing file, use it */
|
427 | ea2384d3 | bellard | bs->backing_hd = bdrv_new("");
|
428 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
429 | ea2384d3 | bellard | fail:
|
430 | ea2384d3 | bellard | bdrv_close(bs); |
431 | 6b21b973 | bellard | return -ENOMEM;
|
432 | 33e3963e | bellard | } |
433 | 83f64091 | bellard | path_combine(backing_filename, sizeof(backing_filename),
|
434 | 83f64091 | bellard | filename, bs->backing_file); |
435 | 9f7965c7 | aliguori | if (bdrv_open(bs->backing_hd, backing_filename, open_flags) < 0) |
436 | 33e3963e | bellard | goto fail;
|
437 | 33e3963e | bellard | } |
438 | 33e3963e | 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 | return 0; |
445 | fc01f7e7 | bellard | } |
446 | fc01f7e7 | bellard | |
447 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
448 | fc01f7e7 | bellard | { |
449 | 19cb3738 | bellard | if (bs->drv) {
|
450 | ea2384d3 | bellard | if (bs->backing_hd)
|
451 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
452 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
453 | ea2384d3 | bellard | qemu_free(bs->opaque); |
454 | ea2384d3 | bellard | #ifdef _WIN32
|
455 | ea2384d3 | bellard | if (bs->is_temporary) {
|
456 | ea2384d3 | bellard | unlink(bs->filename); |
457 | ea2384d3 | bellard | } |
458 | 67b915a5 | bellard | #endif
|
459 | ea2384d3 | bellard | bs->opaque = NULL;
|
460 | ea2384d3 | bellard | bs->drv = NULL;
|
461 | b338082b | bellard | |
462 | b338082b | bellard | /* call the change callback */
|
463 | 19cb3738 | bellard | bs->media_changed = 1;
|
464 | b338082b | bellard | if (bs->change_cb)
|
465 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
466 | b338082b | bellard | } |
467 | b338082b | bellard | } |
468 | b338082b | bellard | |
469 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
470 | b338082b | bellard | { |
471 | 34c6f050 | aurel32 | BlockDriverState **pbs; |
472 | 34c6f050 | aurel32 | |
473 | 34c6f050 | aurel32 | pbs = &bdrv_first; |
474 | 34c6f050 | aurel32 | while (*pbs != bs && *pbs != NULL) |
475 | 34c6f050 | aurel32 | pbs = &(*pbs)->next; |
476 | 34c6f050 | aurel32 | if (*pbs == bs)
|
477 | 34c6f050 | aurel32 | *pbs = bs->next; |
478 | 34c6f050 | aurel32 | |
479 | b338082b | bellard | bdrv_close(bs); |
480 | b338082b | bellard | qemu_free(bs); |
481 | fc01f7e7 | bellard | } |
482 | fc01f7e7 | bellard | |
483 | 33e3963e | bellard | /* commit COW file into the raw image */
|
484 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
485 | 33e3963e | bellard | { |
486 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
487 | 83f64091 | bellard | int64_t i, total_sectors; |
488 | ea2384d3 | bellard | int n, j;
|
489 | ea2384d3 | bellard | unsigned char sector[512]; |
490 | 33e3963e | bellard | |
491 | 19cb3738 | bellard | if (!drv)
|
492 | 19cb3738 | bellard | return -ENOMEDIUM;
|
493 | 33e3963e | bellard | |
494 | 33e3963e | bellard | if (bs->read_only) {
|
495 | ea2384d3 | bellard | return -EACCES;
|
496 | 33e3963e | bellard | } |
497 | 33e3963e | bellard | |
498 | ea2384d3 | bellard | if (!bs->backing_hd) {
|
499 | ea2384d3 | bellard | return -ENOTSUP;
|
500 | ea2384d3 | bellard | } |
501 | 33e3963e | bellard | |
502 | 83f64091 | bellard | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
503 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
504 | 19cb3738 | bellard | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
505 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
506 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
507 | ea2384d3 | bellard | return -EIO;
|
508 | ea2384d3 | bellard | } |
509 | ea2384d3 | bellard | |
510 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
511 | ea2384d3 | bellard | return -EIO;
|
512 | ea2384d3 | bellard | } |
513 | ea2384d3 | bellard | i++; |
514 | 33e3963e | bellard | } |
515 | ea2384d3 | bellard | } else {
|
516 | ea2384d3 | bellard | i += n; |
517 | ea2384d3 | bellard | } |
518 | 33e3963e | bellard | } |
519 | 95389c86 | bellard | |
520 | 19cb3738 | bellard | if (drv->bdrv_make_empty)
|
521 | 19cb3738 | bellard | return drv->bdrv_make_empty(bs);
|
522 | 95389c86 | bellard | |
523 | 33e3963e | bellard | return 0; |
524 | 33e3963e | bellard | } |
525 | 33e3963e | bellard | |
526 | 19cb3738 | bellard | /* return < 0 if error. See bdrv_write() for the return codes */
|
527 | 5fafdf24 | ths | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
528 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
529 | fc01f7e7 | bellard | { |
530 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
531 | ea2384d3 | bellard | |
532 | 19cb3738 | bellard | if (!drv)
|
533 | 19cb3738 | bellard | return -ENOMEDIUM;
|
534 | b338082b | bellard | |
535 | 83f64091 | bellard | if (drv->bdrv_pread) {
|
536 | 83f64091 | bellard | int ret, len;
|
537 | 83f64091 | bellard | len = nb_sectors * 512;
|
538 | 83f64091 | bellard | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len);
|
539 | 83f64091 | bellard | if (ret < 0) |
540 | 83f64091 | bellard | return ret;
|
541 | 83f64091 | bellard | else if (ret != len) |
542 | 19cb3738 | bellard | return -EINVAL;
|
543 | a36e69dd | ths | else {
|
544 | a36e69dd | ths | bs->rd_bytes += (unsigned) len;
|
545 | a36e69dd | ths | bs->rd_ops ++; |
546 | 83f64091 | bellard | return 0; |
547 | a36e69dd | ths | } |
548 | 83f64091 | bellard | } else {
|
549 | 83f64091 | bellard | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
550 | 33e3963e | bellard | } |
551 | fc01f7e7 | bellard | } |
552 | fc01f7e7 | bellard | |
553 | 5fafdf24 | ths | /* Return < 0 if error. Important errors are:
|
554 | 19cb3738 | bellard | -EIO generic I/O error (may happen for all errors)
|
555 | 19cb3738 | bellard | -ENOMEDIUM No media inserted.
|
556 | 19cb3738 | bellard | -EINVAL Invalid sector number or nb_sectors
|
557 | 19cb3738 | bellard | -EACCES Trying to write a read-only device
|
558 | 19cb3738 | bellard | */
|
559 | 5fafdf24 | ths | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
560 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
561 | fc01f7e7 | bellard | { |
562 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
563 | 19cb3738 | bellard | if (!bs->drv)
|
564 | 19cb3738 | bellard | return -ENOMEDIUM;
|
565 | 0849bf08 | bellard | if (bs->read_only)
|
566 | 19cb3738 | bellard | return -EACCES;
|
567 | 83f64091 | bellard | if (drv->bdrv_pwrite) {
|
568 | 83f64091 | bellard | int ret, len;
|
569 | 83f64091 | bellard | len = nb_sectors * 512;
|
570 | 83f64091 | bellard | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len);
|
571 | 83f64091 | bellard | if (ret < 0) |
572 | 83f64091 | bellard | return ret;
|
573 | 83f64091 | bellard | else if (ret != len) |
574 | 83f64091 | bellard | return -EIO;
|
575 | a36e69dd | ths | else {
|
576 | a36e69dd | ths | bs->wr_bytes += (unsigned) len;
|
577 | a36e69dd | ths | bs->wr_ops ++; |
578 | 83f64091 | bellard | return 0; |
579 | a36e69dd | ths | } |
580 | 83f64091 | bellard | } else {
|
581 | 83f64091 | bellard | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
582 | 83f64091 | bellard | } |
583 | 83f64091 | bellard | } |
584 | 83f64091 | bellard | |
585 | 5fafdf24 | ths | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
586 | faea38e7 | bellard | uint8_t *buf, int count1)
|
587 | 83f64091 | bellard | { |
588 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
589 | 83f64091 | bellard | int len, nb_sectors, count;
|
590 | 83f64091 | bellard | int64_t sector_num; |
591 | 83f64091 | bellard | |
592 | 83f64091 | bellard | count = count1; |
593 | 83f64091 | bellard | /* first read to align to sector start */
|
594 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
595 | 83f64091 | bellard | if (len > count)
|
596 | 83f64091 | bellard | len = count; |
597 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
598 | 83f64091 | bellard | if (len > 0) { |
599 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
600 | 83f64091 | bellard | return -EIO;
|
601 | 83f64091 | bellard | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
|
602 | 83f64091 | bellard | count -= len; |
603 | 83f64091 | bellard | if (count == 0) |
604 | 83f64091 | bellard | return count1;
|
605 | 83f64091 | bellard | sector_num++; |
606 | 83f64091 | bellard | buf += len; |
607 | 83f64091 | bellard | } |
608 | 83f64091 | bellard | |
609 | 83f64091 | bellard | /* read the sectors "in place" */
|
610 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
611 | 83f64091 | bellard | if (nb_sectors > 0) { |
612 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
613 | 83f64091 | bellard | return -EIO;
|
614 | 83f64091 | bellard | sector_num += nb_sectors; |
615 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
616 | 83f64091 | bellard | buf += len; |
617 | 83f64091 | bellard | count -= len; |
618 | 83f64091 | bellard | } |
619 | 83f64091 | bellard | |
620 | 83f64091 | bellard | /* add data from the last sector */
|
621 | 83f64091 | bellard | if (count > 0) { |
622 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
623 | 83f64091 | bellard | return -EIO;
|
624 | 83f64091 | bellard | memcpy(buf, tmp_buf, count); |
625 | 83f64091 | bellard | } |
626 | 83f64091 | bellard | return count1;
|
627 | 83f64091 | bellard | } |
628 | 83f64091 | bellard | |
629 | 5fafdf24 | ths | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
630 | faea38e7 | bellard | const uint8_t *buf, int count1) |
631 | 83f64091 | bellard | { |
632 | 83f64091 | bellard | uint8_t tmp_buf[SECTOR_SIZE]; |
633 | 83f64091 | bellard | int len, nb_sectors, count;
|
634 | 83f64091 | bellard | int64_t sector_num; |
635 | 83f64091 | bellard | |
636 | 83f64091 | bellard | count = count1; |
637 | 83f64091 | bellard | /* first write to align to sector start */
|
638 | 83f64091 | bellard | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
|
639 | 83f64091 | bellard | if (len > count)
|
640 | 83f64091 | bellard | len = count; |
641 | 83f64091 | bellard | sector_num = offset >> SECTOR_BITS; |
642 | 83f64091 | bellard | if (len > 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 + (offset & (SECTOR_SIZE - 1)), buf, len);
|
646 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
647 | 83f64091 | bellard | return -EIO;
|
648 | 83f64091 | bellard | count -= len; |
649 | 83f64091 | bellard | if (count == 0) |
650 | 83f64091 | bellard | return count1;
|
651 | 83f64091 | bellard | sector_num++; |
652 | 83f64091 | bellard | buf += len; |
653 | 83f64091 | bellard | } |
654 | 83f64091 | bellard | |
655 | 83f64091 | bellard | /* write the sectors "in place" */
|
656 | 83f64091 | bellard | nb_sectors = count >> SECTOR_BITS; |
657 | 83f64091 | bellard | if (nb_sectors > 0) { |
658 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
659 | 83f64091 | bellard | return -EIO;
|
660 | 83f64091 | bellard | sector_num += nb_sectors; |
661 | 83f64091 | bellard | len = nb_sectors << SECTOR_BITS; |
662 | 83f64091 | bellard | buf += len; |
663 | 83f64091 | bellard | count -= len; |
664 | 83f64091 | bellard | } |
665 | 83f64091 | bellard | |
666 | 83f64091 | bellard | /* add data from the last sector */
|
667 | 83f64091 | bellard | if (count > 0) { |
668 | 83f64091 | bellard | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
669 | 83f64091 | bellard | return -EIO;
|
670 | 83f64091 | bellard | memcpy(tmp_buf, buf, count); |
671 | 83f64091 | bellard | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
672 | 83f64091 | bellard | return -EIO;
|
673 | 83f64091 | bellard | } |
674 | 83f64091 | bellard | return count1;
|
675 | 83f64091 | bellard | } |
676 | 83f64091 | bellard | |
677 | 83f64091 | bellard | /**
|
678 | 5fafdf24 | ths | * Read with byte offsets (needed only for file protocols)
|
679 | 83f64091 | bellard | */
|
680 | 5fafdf24 | ths | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
681 | 83f64091 | bellard | void *buf1, int count1) |
682 | 83f64091 | bellard | { |
683 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
684 | 83f64091 | bellard | |
685 | 83f64091 | bellard | if (!drv)
|
686 | 19cb3738 | bellard | return -ENOMEDIUM;
|
687 | 83f64091 | bellard | if (!drv->bdrv_pread)
|
688 | faea38e7 | bellard | return bdrv_pread_em(bs, offset, buf1, count1);
|
689 | 83f64091 | bellard | return drv->bdrv_pread(bs, offset, buf1, count1);
|
690 | 83f64091 | bellard | } |
691 | 83f64091 | bellard | |
692 | 5fafdf24 | ths | /**
|
693 | 5fafdf24 | ths | * Write with byte offsets (needed only for file protocols)
|
694 | 83f64091 | bellard | */
|
695 | 5fafdf24 | ths | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
696 | 83f64091 | bellard | const void *buf1, int count1) |
697 | 83f64091 | bellard | { |
698 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
699 | 83f64091 | bellard | |
700 | 83f64091 | bellard | if (!drv)
|
701 | 19cb3738 | bellard | return -ENOMEDIUM;
|
702 | 83f64091 | bellard | if (!drv->bdrv_pwrite)
|
703 | faea38e7 | bellard | return bdrv_pwrite_em(bs, offset, buf1, count1);
|
704 | 83f64091 | bellard | return drv->bdrv_pwrite(bs, offset, buf1, count1);
|
705 | 83f64091 | bellard | } |
706 | 83f64091 | bellard | |
707 | 83f64091 | bellard | /**
|
708 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
709 | 83f64091 | bellard | */
|
710 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
711 | 83f64091 | bellard | { |
712 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
713 | 83f64091 | bellard | if (!drv)
|
714 | 19cb3738 | bellard | return -ENOMEDIUM;
|
715 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
716 | 83f64091 | bellard | return -ENOTSUP;
|
717 | 83f64091 | bellard | return drv->bdrv_truncate(bs, offset);
|
718 | 83f64091 | bellard | } |
719 | 83f64091 | bellard | |
720 | 83f64091 | bellard | /**
|
721 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
722 | 83f64091 | bellard | */
|
723 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
724 | 83f64091 | bellard | { |
725 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
726 | 83f64091 | bellard | if (!drv)
|
727 | 19cb3738 | bellard | return -ENOMEDIUM;
|
728 | 83f64091 | bellard | if (!drv->bdrv_getlength) {
|
729 | 83f64091 | bellard | /* legacy mode */
|
730 | 83f64091 | bellard | return bs->total_sectors * SECTOR_SIZE;
|
731 | 83f64091 | bellard | } |
732 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
733 | fc01f7e7 | bellard | } |
734 | fc01f7e7 | bellard | |
735 | 19cb3738 | bellard | /* return 0 as number of sectors if no device present or error */
|
736 | 96b8f136 | ths | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
|
737 | fc01f7e7 | bellard | { |
738 | 19cb3738 | bellard | int64_t length; |
739 | 19cb3738 | bellard | length = bdrv_getlength(bs); |
740 | 19cb3738 | bellard | if (length < 0) |
741 | 19cb3738 | bellard | length = 0;
|
742 | 19cb3738 | bellard | else
|
743 | 19cb3738 | bellard | length = length >> SECTOR_BITS; |
744 | 19cb3738 | bellard | *nb_sectors_ptr = length; |
745 | fc01f7e7 | bellard | } |
746 | cf98951b | bellard | |
747 | f3d54fc4 | aliguori | struct partition {
|
748 | f3d54fc4 | aliguori | uint8_t boot_ind; /* 0x80 - active */
|
749 | f3d54fc4 | aliguori | uint8_t head; /* starting head */
|
750 | f3d54fc4 | aliguori | uint8_t sector; /* starting sector */
|
751 | f3d54fc4 | aliguori | uint8_t cyl; /* starting cylinder */
|
752 | f3d54fc4 | aliguori | uint8_t sys_ind; /* What partition type */
|
753 | f3d54fc4 | aliguori | uint8_t end_head; /* end head */
|
754 | f3d54fc4 | aliguori | uint8_t end_sector; /* end sector */
|
755 | f3d54fc4 | aliguori | uint8_t end_cyl; /* end cylinder */
|
756 | f3d54fc4 | aliguori | uint32_t start_sect; /* starting sector counting from 0 */
|
757 | f3d54fc4 | aliguori | uint32_t nr_sects; /* nr of sectors in partition */
|
758 | f3d54fc4 | aliguori | } __attribute__((packed)); |
759 | f3d54fc4 | aliguori | |
760 | f3d54fc4 | aliguori | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */
|
761 | f3d54fc4 | aliguori | static int guess_disk_lchs(BlockDriverState *bs, |
762 | f3d54fc4 | aliguori | int *pcylinders, int *pheads, int *psectors) |
763 | f3d54fc4 | aliguori | { |
764 | f3d54fc4 | aliguori | uint8_t buf[512];
|
765 | f3d54fc4 | aliguori | int ret, i, heads, sectors, cylinders;
|
766 | f3d54fc4 | aliguori | struct partition *p;
|
767 | f3d54fc4 | aliguori | uint32_t nr_sects; |
768 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
769 | f3d54fc4 | aliguori | |
770 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
771 | f3d54fc4 | aliguori | |
772 | f3d54fc4 | aliguori | ret = bdrv_read(bs, 0, buf, 1); |
773 | f3d54fc4 | aliguori | if (ret < 0) |
774 | f3d54fc4 | aliguori | return -1; |
775 | f3d54fc4 | aliguori | /* test msdos magic */
|
776 | f3d54fc4 | aliguori | if (buf[510] != 0x55 || buf[511] != 0xaa) |
777 | f3d54fc4 | aliguori | return -1; |
778 | f3d54fc4 | aliguori | for(i = 0; i < 4; i++) { |
779 | f3d54fc4 | aliguori | p = ((struct partition *)(buf + 0x1be)) + i; |
780 | f3d54fc4 | aliguori | nr_sects = le32_to_cpu(p->nr_sects); |
781 | f3d54fc4 | aliguori | if (nr_sects && p->end_head) {
|
782 | f3d54fc4 | aliguori | /* We make the assumption that the partition terminates on
|
783 | f3d54fc4 | aliguori | a cylinder boundary */
|
784 | f3d54fc4 | aliguori | heads = p->end_head + 1;
|
785 | f3d54fc4 | aliguori | sectors = p->end_sector & 63;
|
786 | f3d54fc4 | aliguori | if (sectors == 0) |
787 | f3d54fc4 | aliguori | continue;
|
788 | f3d54fc4 | aliguori | cylinders = nb_sectors / (heads * sectors); |
789 | f3d54fc4 | aliguori | if (cylinders < 1 || cylinders > 16383) |
790 | f3d54fc4 | aliguori | continue;
|
791 | f3d54fc4 | aliguori | *pheads = heads; |
792 | f3d54fc4 | aliguori | *psectors = sectors; |
793 | f3d54fc4 | aliguori | *pcylinders = cylinders; |
794 | f3d54fc4 | aliguori | #if 0
|
795 | f3d54fc4 | aliguori | printf("guessed geometry: LCHS=%d %d %d\n",
|
796 | f3d54fc4 | aliguori | cylinders, heads, sectors);
|
797 | f3d54fc4 | aliguori | #endif
|
798 | f3d54fc4 | aliguori | return 0; |
799 | f3d54fc4 | aliguori | } |
800 | f3d54fc4 | aliguori | } |
801 | f3d54fc4 | aliguori | return -1; |
802 | f3d54fc4 | aliguori | } |
803 | f3d54fc4 | aliguori | |
804 | f3d54fc4 | aliguori | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) |
805 | f3d54fc4 | aliguori | { |
806 | f3d54fc4 | aliguori | int translation, lba_detected = 0; |
807 | f3d54fc4 | aliguori | int cylinders, heads, secs;
|
808 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
809 | f3d54fc4 | aliguori | |
810 | f3d54fc4 | aliguori | /* if a geometry hint is available, use it */
|
811 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
812 | f3d54fc4 | aliguori | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); |
813 | f3d54fc4 | aliguori | translation = bdrv_get_translation_hint(bs); |
814 | f3d54fc4 | aliguori | if (cylinders != 0) { |
815 | f3d54fc4 | aliguori | *pcyls = cylinders; |
816 | f3d54fc4 | aliguori | *pheads = heads; |
817 | f3d54fc4 | aliguori | *psecs = secs; |
818 | f3d54fc4 | aliguori | } else {
|
819 | f3d54fc4 | aliguori | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { |
820 | f3d54fc4 | aliguori | if (heads > 16) { |
821 | f3d54fc4 | aliguori | /* if heads > 16, it means that a BIOS LBA
|
822 | f3d54fc4 | aliguori | translation was active, so the default
|
823 | f3d54fc4 | aliguori | hardware geometry is OK */
|
824 | f3d54fc4 | aliguori | lba_detected = 1;
|
825 | f3d54fc4 | aliguori | goto default_geometry;
|
826 | f3d54fc4 | aliguori | } else {
|
827 | f3d54fc4 | aliguori | *pcyls = cylinders; |
828 | f3d54fc4 | aliguori | *pheads = heads; |
829 | f3d54fc4 | aliguori | *psecs = secs; |
830 | f3d54fc4 | aliguori | /* disable any translation to be in sync with
|
831 | f3d54fc4 | aliguori | the logical geometry */
|
832 | f3d54fc4 | aliguori | if (translation == BIOS_ATA_TRANSLATION_AUTO) {
|
833 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
834 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_NONE); |
835 | f3d54fc4 | aliguori | } |
836 | f3d54fc4 | aliguori | } |
837 | f3d54fc4 | aliguori | } else {
|
838 | f3d54fc4 | aliguori | default_geometry:
|
839 | f3d54fc4 | aliguori | /* if no geometry, use a standard physical disk geometry */
|
840 | f3d54fc4 | aliguori | cylinders = nb_sectors / (16 * 63); |
841 | f3d54fc4 | aliguori | |
842 | f3d54fc4 | aliguori | if (cylinders > 16383) |
843 | f3d54fc4 | aliguori | cylinders = 16383;
|
844 | f3d54fc4 | aliguori | else if (cylinders < 2) |
845 | f3d54fc4 | aliguori | cylinders = 2;
|
846 | f3d54fc4 | aliguori | *pcyls = cylinders; |
847 | f3d54fc4 | aliguori | *pheads = 16;
|
848 | f3d54fc4 | aliguori | *psecs = 63;
|
849 | f3d54fc4 | aliguori | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { |
850 | f3d54fc4 | aliguori | if ((*pcyls * *pheads) <= 131072) { |
851 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
852 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LARGE); |
853 | f3d54fc4 | aliguori | } else {
|
854 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
855 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LBA); |
856 | f3d54fc4 | aliguori | } |
857 | f3d54fc4 | aliguori | } |
858 | f3d54fc4 | aliguori | } |
859 | f3d54fc4 | aliguori | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); |
860 | f3d54fc4 | aliguori | } |
861 | f3d54fc4 | aliguori | } |
862 | f3d54fc4 | aliguori | |
863 | 5fafdf24 | ths | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
864 | b338082b | bellard | int cyls, int heads, int secs) |
865 | b338082b | bellard | { |
866 | b338082b | bellard | bs->cyls = cyls; |
867 | b338082b | bellard | bs->heads = heads; |
868 | b338082b | bellard | bs->secs = secs; |
869 | b338082b | bellard | } |
870 | b338082b | bellard | |
871 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
872 | b338082b | bellard | { |
873 | b338082b | bellard | bs->type = type; |
874 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
875 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
876 | b338082b | bellard | } |
877 | b338082b | bellard | |
878 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
879 | 46d4767d | bellard | { |
880 | 46d4767d | bellard | bs->translation = translation; |
881 | 46d4767d | bellard | } |
882 | 46d4767d | bellard | |
883 | 5fafdf24 | ths | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
884 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
885 | b338082b | bellard | { |
886 | b338082b | bellard | *pcyls = bs->cyls; |
887 | b338082b | bellard | *pheads = bs->heads; |
888 | b338082b | bellard | *psecs = bs->secs; |
889 | b338082b | bellard | } |
890 | b338082b | bellard | |
891 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
892 | b338082b | bellard | { |
893 | b338082b | bellard | return bs->type;
|
894 | b338082b | bellard | } |
895 | b338082b | bellard | |
896 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
897 | 46d4767d | bellard | { |
898 | 46d4767d | bellard | return bs->translation;
|
899 | 46d4767d | bellard | } |
900 | 46d4767d | bellard | |
901 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
902 | b338082b | bellard | { |
903 | b338082b | bellard | return bs->removable;
|
904 | b338082b | bellard | } |
905 | b338082b | bellard | |
906 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
907 | b338082b | bellard | { |
908 | b338082b | bellard | return bs->read_only;
|
909 | b338082b | bellard | } |
910 | b338082b | bellard | |
911 | 985a03b0 | ths | int bdrv_is_sg(BlockDriverState *bs)
|
912 | 985a03b0 | ths | { |
913 | 985a03b0 | ths | return bs->sg;
|
914 | 985a03b0 | ths | } |
915 | 985a03b0 | ths | |
916 | 19cb3738 | bellard | /* XXX: no longer used */
|
917 | 5fafdf24 | ths | void bdrv_set_change_cb(BlockDriverState *bs,
|
918 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
919 | b338082b | bellard | { |
920 | b338082b | bellard | bs->change_cb = change_cb; |
921 | b338082b | bellard | bs->change_opaque = opaque; |
922 | b338082b | bellard | } |
923 | b338082b | bellard | |
924 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
925 | ea2384d3 | bellard | { |
926 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
927 | ea2384d3 | bellard | return 1; |
928 | ea2384d3 | bellard | return bs->encrypted;
|
929 | ea2384d3 | bellard | } |
930 | ea2384d3 | bellard | |
931 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
932 | ea2384d3 | bellard | { |
933 | ea2384d3 | bellard | int ret;
|
934 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
935 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
936 | ea2384d3 | bellard | if (ret < 0) |
937 | ea2384d3 | bellard | return ret;
|
938 | ea2384d3 | bellard | if (!bs->encrypted)
|
939 | ea2384d3 | bellard | return 0; |
940 | ea2384d3 | bellard | } |
941 | ea2384d3 | bellard | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
|
942 | ea2384d3 | bellard | return -1; |
943 | ea2384d3 | bellard | return bs->drv->bdrv_set_key(bs, key);
|
944 | ea2384d3 | bellard | } |
945 | ea2384d3 | bellard | |
946 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
947 | ea2384d3 | bellard | { |
948 | 19cb3738 | bellard | if (!bs->drv) {
|
949 | ea2384d3 | bellard | buf[0] = '\0'; |
950 | ea2384d3 | bellard | } else {
|
951 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
952 | ea2384d3 | bellard | } |
953 | ea2384d3 | bellard | } |
954 | ea2384d3 | bellard | |
955 | 5fafdf24 | ths | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
956 | ea2384d3 | bellard | void *opaque)
|
957 | ea2384d3 | bellard | { |
958 | ea2384d3 | bellard | BlockDriver *drv; |
959 | ea2384d3 | bellard | |
960 | ea2384d3 | bellard | for (drv = first_drv; drv != NULL; drv = drv->next) { |
961 | ea2384d3 | bellard | it(opaque, drv->format_name); |
962 | ea2384d3 | bellard | } |
963 | ea2384d3 | bellard | } |
964 | ea2384d3 | bellard | |
965 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
966 | b338082b | bellard | { |
967 | b338082b | bellard | BlockDriverState *bs; |
968 | b338082b | bellard | |
969 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
970 | b338082b | bellard | if (!strcmp(name, bs->device_name))
|
971 | b338082b | bellard | return bs;
|
972 | b338082b | bellard | } |
973 | b338082b | bellard | return NULL; |
974 | b338082b | bellard | } |
975 | b338082b | bellard | |
976 | 81d0912d | bellard | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
977 | 81d0912d | bellard | { |
978 | 81d0912d | bellard | BlockDriverState *bs; |
979 | 81d0912d | bellard | |
980 | 81d0912d | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
981 | 81d0912d | bellard | it(opaque, bs->device_name); |
982 | 81d0912d | bellard | } |
983 | 81d0912d | bellard | } |
984 | 81d0912d | bellard | |
985 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
986 | ea2384d3 | bellard | { |
987 | ea2384d3 | bellard | return bs->device_name;
|
988 | ea2384d3 | bellard | } |
989 | ea2384d3 | bellard | |
990 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
991 | 7a6cba61 | pbrook | { |
992 | 7a6cba61 | pbrook | if (bs->drv->bdrv_flush)
|
993 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
994 | 7a6cba61 | pbrook | if (bs->backing_hd)
|
995 | 7a6cba61 | pbrook | bdrv_flush(bs->backing_hd); |
996 | 7a6cba61 | pbrook | } |
997 | 7a6cba61 | pbrook | |
998 | c6ca28d6 | aliguori | void bdrv_flush_all(void) |
999 | c6ca28d6 | aliguori | { |
1000 | c6ca28d6 | aliguori | BlockDriverState *bs; |
1001 | c6ca28d6 | aliguori | |
1002 | c6ca28d6 | aliguori | for (bs = bdrv_first; bs != NULL; bs = bs->next) |
1003 | c6ca28d6 | aliguori | if (bs->drv && !bdrv_is_read_only(bs) &&
|
1004 | c6ca28d6 | aliguori | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) |
1005 | c6ca28d6 | aliguori | bdrv_flush(bs); |
1006 | c6ca28d6 | aliguori | } |
1007 | c6ca28d6 | aliguori | |
1008 | f58c7b35 | ths | /*
|
1009 | f58c7b35 | ths | * Returns true iff the specified sector is present in the disk image. Drivers
|
1010 | f58c7b35 | ths | * not implementing the functionality are assumed to not support backing files,
|
1011 | f58c7b35 | ths | * hence all their sectors are reported as allocated.
|
1012 | f58c7b35 | ths | *
|
1013 | f58c7b35 | ths | * 'pnum' is set to the number of sectors (including and immediately following
|
1014 | f58c7b35 | ths | * the specified sector) that are known to be in the same
|
1015 | f58c7b35 | ths | * allocated/unallocated state.
|
1016 | f58c7b35 | ths | *
|
1017 | f58c7b35 | ths | * 'nb_sectors' is the max value 'pnum' should be set to.
|
1018 | f58c7b35 | ths | */
|
1019 | f58c7b35 | ths | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
1020 | f58c7b35 | ths | int *pnum)
|
1021 | f58c7b35 | ths | { |
1022 | f58c7b35 | ths | int64_t n; |
1023 | f58c7b35 | ths | if (!bs->drv->bdrv_is_allocated) {
|
1024 | f58c7b35 | ths | if (sector_num >= bs->total_sectors) {
|
1025 | f58c7b35 | ths | *pnum = 0;
|
1026 | f58c7b35 | ths | return 0; |
1027 | f58c7b35 | ths | } |
1028 | f58c7b35 | ths | n = bs->total_sectors - sector_num; |
1029 | f58c7b35 | ths | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); |
1030 | f58c7b35 | ths | return 1; |
1031 | f58c7b35 | ths | } |
1032 | f58c7b35 | ths | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum);
|
1033 | f58c7b35 | ths | } |
1034 | f58c7b35 | ths | |
1035 | b338082b | bellard | void bdrv_info(void) |
1036 | b338082b | bellard | { |
1037 | b338082b | bellard | BlockDriverState *bs; |
1038 | b338082b | bellard | |
1039 | b338082b | bellard | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
1040 | b338082b | bellard | term_printf("%s:", bs->device_name);
|
1041 | b338082b | bellard | term_printf(" type=");
|
1042 | b338082b | bellard | switch(bs->type) {
|
1043 | b338082b | bellard | case BDRV_TYPE_HD:
|
1044 | b338082b | bellard | term_printf("hd");
|
1045 | b338082b | bellard | break;
|
1046 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
1047 | b338082b | bellard | term_printf("cdrom");
|
1048 | b338082b | bellard | break;
|
1049 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
1050 | b338082b | bellard | term_printf("floppy");
|
1051 | b338082b | bellard | break;
|
1052 | b338082b | bellard | } |
1053 | b338082b | bellard | term_printf(" removable=%d", bs->removable);
|
1054 | b338082b | bellard | if (bs->removable) {
|
1055 | b338082b | bellard | term_printf(" locked=%d", bs->locked);
|
1056 | b338082b | bellard | } |
1057 | 19cb3738 | bellard | if (bs->drv) {
|
1058 | fef30743 | ths | term_printf(" file=");
|
1059 | fef30743 | ths | term_print_filename(bs->filename); |
1060 | fef30743 | ths | if (bs->backing_file[0] != '\0') { |
1061 | fef30743 | ths | term_printf(" backing_file=");
|
1062 | fef30743 | ths | term_print_filename(bs->backing_file); |
1063 | fef30743 | ths | } |
1064 | b338082b | bellard | term_printf(" ro=%d", bs->read_only);
|
1065 | ea2384d3 | bellard | term_printf(" drv=%s", bs->drv->format_name);
|
1066 | ea2384d3 | bellard | if (bs->encrypted)
|
1067 | ea2384d3 | bellard | term_printf(" encrypted");
|
1068 | b338082b | bellard | } else {
|
1069 | b338082b | bellard | term_printf(" [not inserted]");
|
1070 | b338082b | bellard | } |
1071 | b338082b | bellard | term_printf("\n");
|
1072 | b338082b | bellard | } |
1073 | b338082b | bellard | } |
1074 | a36e69dd | ths | |
1075 | a36e69dd | ths | /* The "info blockstats" command. */
|
1076 | a36e69dd | ths | void bdrv_info_stats (void) |
1077 | a36e69dd | ths | { |
1078 | a36e69dd | ths | BlockDriverState *bs; |
1079 | a36e69dd | ths | |
1080 | a36e69dd | ths | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
1081 | a36e69dd | ths | term_printf ("%s:"
|
1082 | a36e69dd | ths | " rd_bytes=%" PRIu64
|
1083 | a36e69dd | ths | " wr_bytes=%" PRIu64
|
1084 | a36e69dd | ths | " rd_operations=%" PRIu64
|
1085 | a36e69dd | ths | " wr_operations=%" PRIu64
|
1086 | a36e69dd | ths | "\n",
|
1087 | a36e69dd | ths | bs->device_name, |
1088 | a36e69dd | ths | bs->rd_bytes, bs->wr_bytes, |
1089 | a36e69dd | ths | bs->rd_ops, bs->wr_ops); |
1090 | a36e69dd | ths | } |
1091 | a36e69dd | ths | } |
1092 | ea2384d3 | bellard | |
1093 | 5fafdf24 | ths | void bdrv_get_backing_filename(BlockDriverState *bs,
|
1094 | 83f64091 | bellard | char *filename, int filename_size) |
1095 | 83f64091 | bellard | { |
1096 | 83f64091 | bellard | if (!bs->backing_hd) {
|
1097 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
1098 | 83f64091 | bellard | } else {
|
1099 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
1100 | 83f64091 | bellard | } |
1101 | 83f64091 | bellard | } |
1102 | 83f64091 | bellard | |
1103 | 5fafdf24 | ths | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
1104 | faea38e7 | bellard | const uint8_t *buf, int nb_sectors) |
1105 | faea38e7 | bellard | { |
1106 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1107 | faea38e7 | bellard | if (!drv)
|
1108 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1109 | faea38e7 | bellard | if (!drv->bdrv_write_compressed)
|
1110 | faea38e7 | bellard | return -ENOTSUP;
|
1111 | faea38e7 | bellard | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
|
1112 | faea38e7 | bellard | } |
1113 | 3b46e624 | ths | |
1114 | faea38e7 | bellard | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
1115 | faea38e7 | bellard | { |
1116 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1117 | faea38e7 | bellard | if (!drv)
|
1118 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1119 | faea38e7 | bellard | if (!drv->bdrv_get_info)
|
1120 | faea38e7 | bellard | return -ENOTSUP;
|
1121 | faea38e7 | bellard | memset(bdi, 0, sizeof(*bdi)); |
1122 | faea38e7 | bellard | return drv->bdrv_get_info(bs, bdi);
|
1123 | faea38e7 | bellard | } |
1124 | faea38e7 | bellard | |
1125 | faea38e7 | bellard | /**************************************************************/
|
1126 | faea38e7 | bellard | /* handling of snapshots */
|
1127 | faea38e7 | bellard | |
1128 | 5fafdf24 | ths | int bdrv_snapshot_create(BlockDriverState *bs,
|
1129 | faea38e7 | bellard | QEMUSnapshotInfo *sn_info) |
1130 | faea38e7 | bellard | { |
1131 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1132 | faea38e7 | bellard | if (!drv)
|
1133 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1134 | faea38e7 | bellard | if (!drv->bdrv_snapshot_create)
|
1135 | faea38e7 | bellard | return -ENOTSUP;
|
1136 | faea38e7 | bellard | return drv->bdrv_snapshot_create(bs, sn_info);
|
1137 | faea38e7 | bellard | } |
1138 | faea38e7 | bellard | |
1139 | 5fafdf24 | ths | int bdrv_snapshot_goto(BlockDriverState *bs,
|
1140 | faea38e7 | bellard | const char *snapshot_id) |
1141 | faea38e7 | bellard | { |
1142 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1143 | faea38e7 | bellard | if (!drv)
|
1144 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1145 | faea38e7 | bellard | if (!drv->bdrv_snapshot_goto)
|
1146 | faea38e7 | bellard | return -ENOTSUP;
|
1147 | faea38e7 | bellard | return drv->bdrv_snapshot_goto(bs, snapshot_id);
|
1148 | faea38e7 | bellard | } |
1149 | faea38e7 | bellard | |
1150 | faea38e7 | bellard | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
1151 | faea38e7 | bellard | { |
1152 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1153 | faea38e7 | bellard | if (!drv)
|
1154 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1155 | faea38e7 | bellard | if (!drv->bdrv_snapshot_delete)
|
1156 | faea38e7 | bellard | return -ENOTSUP;
|
1157 | faea38e7 | bellard | return drv->bdrv_snapshot_delete(bs, snapshot_id);
|
1158 | faea38e7 | bellard | } |
1159 | faea38e7 | bellard | |
1160 | 5fafdf24 | ths | int bdrv_snapshot_list(BlockDriverState *bs,
|
1161 | faea38e7 | bellard | QEMUSnapshotInfo **psn_info) |
1162 | faea38e7 | bellard | { |
1163 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1164 | faea38e7 | bellard | if (!drv)
|
1165 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1166 | faea38e7 | bellard | if (!drv->bdrv_snapshot_list)
|
1167 | faea38e7 | bellard | return -ENOTSUP;
|
1168 | faea38e7 | bellard | return drv->bdrv_snapshot_list(bs, psn_info);
|
1169 | faea38e7 | bellard | } |
1170 | faea38e7 | bellard | |
1171 | faea38e7 | bellard | #define NB_SUFFIXES 4 |
1172 | faea38e7 | bellard | |
1173 | faea38e7 | bellard | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
1174 | faea38e7 | bellard | { |
1175 | faea38e7 | bellard | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
1176 | faea38e7 | bellard | int64_t base; |
1177 | faea38e7 | bellard | int i;
|
1178 | faea38e7 | bellard | |
1179 | faea38e7 | bellard | if (size <= 999) { |
1180 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64, size);
|
1181 | faea38e7 | bellard | } else {
|
1182 | faea38e7 | bellard | base = 1024;
|
1183 | faea38e7 | bellard | for(i = 0; i < NB_SUFFIXES; i++) { |
1184 | faea38e7 | bellard | if (size < (10 * base)) { |
1185 | 5fafdf24 | ths | snprintf(buf, buf_size, "%0.1f%c",
|
1186 | faea38e7 | bellard | (double)size / base,
|
1187 | faea38e7 | bellard | suffixes[i]); |
1188 | faea38e7 | bellard | break;
|
1189 | faea38e7 | bellard | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
1190 | 5fafdf24 | ths | snprintf(buf, buf_size, "%" PRId64 "%c", |
1191 | faea38e7 | bellard | ((size + (base >> 1)) / base),
|
1192 | faea38e7 | bellard | suffixes[i]); |
1193 | faea38e7 | bellard | break;
|
1194 | faea38e7 | bellard | } |
1195 | faea38e7 | bellard | base = base * 1024;
|
1196 | faea38e7 | bellard | } |
1197 | faea38e7 | bellard | } |
1198 | faea38e7 | bellard | return buf;
|
1199 | faea38e7 | bellard | } |
1200 | faea38e7 | bellard | |
1201 | faea38e7 | bellard | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
1202 | faea38e7 | bellard | { |
1203 | faea38e7 | bellard | char buf1[128], date_buf[128], clock_buf[128]; |
1204 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1205 | 3b9f94e1 | bellard | struct tm *ptm;
|
1206 | 3b9f94e1 | bellard | #else
|
1207 | faea38e7 | bellard | struct tm tm;
|
1208 | 3b9f94e1 | bellard | #endif
|
1209 | faea38e7 | bellard | time_t ti; |
1210 | faea38e7 | bellard | int64_t secs; |
1211 | faea38e7 | bellard | |
1212 | faea38e7 | bellard | if (!sn) {
|
1213 | 5fafdf24 | ths | snprintf(buf, buf_size, |
1214 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1215 | faea38e7 | bellard | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1216 | faea38e7 | bellard | } else {
|
1217 | faea38e7 | bellard | ti = sn->date_sec; |
1218 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1219 | 3b9f94e1 | bellard | ptm = localtime(&ti); |
1220 | 3b9f94e1 | bellard | strftime(date_buf, sizeof(date_buf),
|
1221 | 3b9f94e1 | bellard | "%Y-%m-%d %H:%M:%S", ptm);
|
1222 | 3b9f94e1 | bellard | #else
|
1223 | faea38e7 | bellard | localtime_r(&ti, &tm); |
1224 | faea38e7 | bellard | strftime(date_buf, sizeof(date_buf),
|
1225 | faea38e7 | bellard | "%Y-%m-%d %H:%M:%S", &tm);
|
1226 | 3b9f94e1 | bellard | #endif
|
1227 | faea38e7 | bellard | secs = sn->vm_clock_nsec / 1000000000;
|
1228 | faea38e7 | bellard | snprintf(clock_buf, sizeof(clock_buf),
|
1229 | faea38e7 | bellard | "%02d:%02d:%02d.%03d",
|
1230 | faea38e7 | bellard | (int)(secs / 3600), |
1231 | faea38e7 | bellard | (int)((secs / 60) % 60), |
1232 | 5fafdf24 | ths | (int)(secs % 60), |
1233 | faea38e7 | bellard | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1234 | faea38e7 | bellard | snprintf(buf, buf_size, |
1235 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1236 | faea38e7 | bellard | sn->id_str, sn->name, |
1237 | faea38e7 | bellard | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
|
1238 | faea38e7 | bellard | date_buf, |
1239 | faea38e7 | bellard | clock_buf); |
1240 | faea38e7 | bellard | } |
1241 | faea38e7 | bellard | return buf;
|
1242 | faea38e7 | bellard | } |
1243 | faea38e7 | bellard | |
1244 | 83f64091 | bellard | |
1245 | ea2384d3 | bellard | /**************************************************************/
|
1246 | 83f64091 | bellard | /* async I/Os */
|
1247 | ea2384d3 | bellard | |
1248 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
1249 | ce1a14dc | pbrook | uint8_t *buf, int nb_sectors,
|
1250 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1251 | 83f64091 | bellard | { |
1252 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1253 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1254 | 83f64091 | bellard | |
1255 | 19cb3738 | bellard | if (!drv)
|
1256 | ce1a14dc | pbrook | return NULL; |
1257 | 3b46e624 | ths | |
1258 | a36e69dd | ths | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
1259 | a36e69dd | ths | |
1260 | a36e69dd | ths | if (ret) {
|
1261 | a36e69dd | ths | /* Update stats even though technically transfer has not happened. */
|
1262 | a36e69dd | ths | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
|
1263 | a36e69dd | ths | bs->rd_ops ++; |
1264 | a36e69dd | ths | } |
1265 | a36e69dd | ths | |
1266 | a36e69dd | ths | return ret;
|
1267 | ea2384d3 | bellard | } |
1268 | ea2384d3 | bellard | |
1269 | ce1a14dc | pbrook | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
1270 | ce1a14dc | pbrook | const uint8_t *buf, int nb_sectors, |
1271 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1272 | ea2384d3 | bellard | { |
1273 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1274 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1275 | ea2384d3 | bellard | |
1276 | 19cb3738 | bellard | if (!drv)
|
1277 | ce1a14dc | pbrook | return NULL; |
1278 | 83f64091 | bellard | if (bs->read_only)
|
1279 | ce1a14dc | pbrook | return NULL; |
1280 | 83f64091 | bellard | |
1281 | a36e69dd | ths | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
1282 | a36e69dd | ths | |
1283 | a36e69dd | ths | if (ret) {
|
1284 | a36e69dd | ths | /* Update stats even though technically transfer has not happened. */
|
1285 | a36e69dd | ths | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
|
1286 | a36e69dd | ths | bs->wr_ops ++; |
1287 | a36e69dd | ths | } |
1288 | a36e69dd | ths | |
1289 | a36e69dd | ths | return ret;
|
1290 | 83f64091 | bellard | } |
1291 | 83f64091 | bellard | |
1292 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
1293 | 83f64091 | bellard | { |
1294 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1295 | 83f64091 | bellard | |
1296 | ce1a14dc | pbrook | drv->bdrv_aio_cancel(acb); |
1297 | 83f64091 | bellard | } |
1298 | 83f64091 | bellard | |
1299 | ce1a14dc | pbrook | |
1300 | 83f64091 | bellard | /**************************************************************/
|
1301 | 83f64091 | bellard | /* async block device emulation */
|
1302 | 83f64091 | bellard | |
1303 | ce1a14dc | pbrook | static void bdrv_aio_bh_cb(void *opaque) |
1304 | 83f64091 | bellard | { |
1305 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = opaque; |
1306 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, acb->ret); |
1307 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1308 | 83f64091 | bellard | } |
1309 | beac80cd | bellard | |
1310 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs,
|
1311 | ce1a14dc | pbrook | int64_t sector_num, uint8_t *buf, int nb_sectors,
|
1312 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1313 | 83f64091 | bellard | { |
1314 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1315 | 83f64091 | bellard | int ret;
|
1316 | ce1a14dc | pbrook | |
1317 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1318 | ce1a14dc | pbrook | if (!acb->bh)
|
1319 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1320 | ce1a14dc | pbrook | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
1321 | ce1a14dc | pbrook | acb->ret = ret; |
1322 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1323 | ce1a14dc | pbrook | return &acb->common;
|
1324 | beac80cd | bellard | } |
1325 | beac80cd | bellard | |
1326 | ce1a14dc | pbrook | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs,
|
1327 | ce1a14dc | pbrook | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
1328 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
1329 | beac80cd | bellard | { |
1330 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
1331 | 83f64091 | bellard | int ret;
|
1332 | 83f64091 | bellard | |
1333 | ce1a14dc | pbrook | acb = qemu_aio_get(bs, cb, opaque); |
1334 | ce1a14dc | pbrook | if (!acb->bh)
|
1335 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
1336 | ce1a14dc | pbrook | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
1337 | ce1a14dc | pbrook | acb->ret = ret; |
1338 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
1339 | ce1a14dc | pbrook | return &acb->common;
|
1340 | beac80cd | bellard | } |
1341 | beac80cd | bellard | |
1342 | ce1a14dc | pbrook | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
1343 | ea2384d3 | bellard | { |
1344 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
1345 | ce1a14dc | pbrook | qemu_bh_cancel(acb->bh); |
1346 | ce1a14dc | pbrook | qemu_aio_release(acb); |
1347 | 83f64091 | bellard | } |
1348 | ea2384d3 | bellard | |
1349 | 83f64091 | bellard | /**************************************************************/
|
1350 | 83f64091 | bellard | /* sync block device emulation */
|
1351 | ea2384d3 | bellard | |
1352 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
1353 | 83f64091 | bellard | { |
1354 | 83f64091 | bellard | *(int *)opaque = ret;
|
1355 | ea2384d3 | bellard | } |
1356 | ea2384d3 | bellard | |
1357 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
1358 | 83f64091 | bellard | |
1359 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
1360 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
1361 | 7a6cba61 | pbrook | { |
1362 | ce1a14dc | pbrook | int async_ret;
|
1363 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1364 | 83f64091 | bellard | |
1365 | 83f64091 | bellard | async_ret = NOT_DONE; |
1366 | 5fafdf24 | ths | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
1367 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1368 | baf35cb9 | aliguori | if (acb == NULL) |
1369 | ce1a14dc | pbrook | return -1; |
1370 | baf35cb9 | aliguori | |
1371 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1372 | 83f64091 | bellard | qemu_aio_wait(); |
1373 | 83f64091 | bellard | } |
1374 | baf35cb9 | aliguori | |
1375 | 83f64091 | bellard | return async_ret;
|
1376 | 7a6cba61 | pbrook | } |
1377 | 7a6cba61 | pbrook | |
1378 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
1379 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
1380 | 83f64091 | bellard | { |
1381 | ce1a14dc | pbrook | int async_ret;
|
1382 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1383 | 83f64091 | bellard | |
1384 | 83f64091 | bellard | async_ret = NOT_DONE; |
1385 | 5fafdf24 | ths | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
1386 | 83f64091 | bellard | bdrv_rw_em_cb, &async_ret); |
1387 | baf35cb9 | aliguori | if (acb == NULL) |
1388 | ce1a14dc | pbrook | return -1; |
1389 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
1390 | 83f64091 | bellard | qemu_aio_wait(); |
1391 | 83f64091 | bellard | } |
1392 | 83f64091 | bellard | return async_ret;
|
1393 | 83f64091 | bellard | } |
1394 | ea2384d3 | bellard | |
1395 | ea2384d3 | bellard | void bdrv_init(void) |
1396 | ea2384d3 | bellard | { |
1397 | ea2384d3 | bellard | bdrv_register(&bdrv_raw); |
1398 | 19cb3738 | bellard | bdrv_register(&bdrv_host_device); |
1399 | ea2384d3 | bellard | #ifndef _WIN32
|
1400 | ea2384d3 | bellard | bdrv_register(&bdrv_cow); |
1401 | ea2384d3 | bellard | #endif
|
1402 | ea2384d3 | bellard | bdrv_register(&bdrv_qcow); |
1403 | ea2384d3 | bellard | bdrv_register(&bdrv_vmdk); |
1404 | 3c56521b | bellard | bdrv_register(&bdrv_cloop); |
1405 | 585d0ed9 | bellard | bdrv_register(&bdrv_dmg); |
1406 | a8753c34 | bellard | bdrv_register(&bdrv_bochs); |
1407 | 6a0f9e82 | bellard | bdrv_register(&bdrv_vpc); |
1408 | 712e7874 | bellard | bdrv_register(&bdrv_vvfat); |
1409 | faea38e7 | bellard | bdrv_register(&bdrv_qcow2); |
1410 | 6ada7453 | ths | bdrv_register(&bdrv_parallels); |
1411 | 75818250 | ths | bdrv_register(&bdrv_nbd); |
1412 | ea2384d3 | bellard | } |
1413 | ce1a14dc | pbrook | |
1414 | ce1a14dc | pbrook | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
|
1415 | ce1a14dc | pbrook | void *opaque)
|
1416 | ce1a14dc | pbrook | { |
1417 | ce1a14dc | pbrook | BlockDriver *drv; |
1418 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
1419 | ce1a14dc | pbrook | |
1420 | ce1a14dc | pbrook | drv = bs->drv; |
1421 | ce1a14dc | pbrook | if (drv->free_aiocb) {
|
1422 | ce1a14dc | pbrook | acb = drv->free_aiocb; |
1423 | ce1a14dc | pbrook | drv->free_aiocb = acb->next; |
1424 | ce1a14dc | pbrook | } else {
|
1425 | ce1a14dc | pbrook | acb = qemu_mallocz(drv->aiocb_size); |
1426 | ce1a14dc | pbrook | if (!acb)
|
1427 | ce1a14dc | pbrook | return NULL; |
1428 | ce1a14dc | pbrook | } |
1429 | ce1a14dc | pbrook | acb->bs = bs; |
1430 | ce1a14dc | pbrook | acb->cb = cb; |
1431 | ce1a14dc | pbrook | acb->opaque = opaque; |
1432 | ce1a14dc | pbrook | return acb;
|
1433 | ce1a14dc | pbrook | } |
1434 | ce1a14dc | pbrook | |
1435 | ce1a14dc | pbrook | void qemu_aio_release(void *p) |
1436 | ce1a14dc | pbrook | { |
1437 | ce1a14dc | pbrook | BlockDriverAIOCB *acb = p; |
1438 | ce1a14dc | pbrook | BlockDriver *drv = acb->bs->drv; |
1439 | ce1a14dc | pbrook | acb->next = drv->free_aiocb; |
1440 | ce1a14dc | pbrook | drv->free_aiocb = acb; |
1441 | ce1a14dc | pbrook | } |
1442 | 19cb3738 | bellard | |
1443 | 19cb3738 | bellard | /**************************************************************/
|
1444 | 19cb3738 | bellard | /* removable device support */
|
1445 | 19cb3738 | bellard | |
1446 | 19cb3738 | bellard | /**
|
1447 | 19cb3738 | bellard | * Return TRUE if the media is present
|
1448 | 19cb3738 | bellard | */
|
1449 | 19cb3738 | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
1450 | 19cb3738 | bellard | { |
1451 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1452 | 19cb3738 | bellard | int ret;
|
1453 | 19cb3738 | bellard | if (!drv)
|
1454 | 19cb3738 | bellard | return 0; |
1455 | 19cb3738 | bellard | if (!drv->bdrv_is_inserted)
|
1456 | 19cb3738 | bellard | return 1; |
1457 | 19cb3738 | bellard | ret = drv->bdrv_is_inserted(bs); |
1458 | 19cb3738 | bellard | return ret;
|
1459 | 19cb3738 | bellard | } |
1460 | 19cb3738 | bellard | |
1461 | 19cb3738 | bellard | /**
|
1462 | 19cb3738 | bellard | * Return TRUE if the media changed since the last call to this
|
1463 | 5fafdf24 | ths | * function. It is currently only used for floppy disks
|
1464 | 19cb3738 | bellard | */
|
1465 | 19cb3738 | bellard | int bdrv_media_changed(BlockDriverState *bs)
|
1466 | 19cb3738 | bellard | { |
1467 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1468 | 19cb3738 | bellard | int ret;
|
1469 | 19cb3738 | bellard | |
1470 | 19cb3738 | bellard | if (!drv || !drv->bdrv_media_changed)
|
1471 | 19cb3738 | bellard | ret = -ENOTSUP; |
1472 | 19cb3738 | bellard | else
|
1473 | 19cb3738 | bellard | ret = drv->bdrv_media_changed(bs); |
1474 | 19cb3738 | bellard | if (ret == -ENOTSUP)
|
1475 | 19cb3738 | bellard | ret = bs->media_changed; |
1476 | 19cb3738 | bellard | bs->media_changed = 0;
|
1477 | 19cb3738 | bellard | return ret;
|
1478 | 19cb3738 | bellard | } |
1479 | 19cb3738 | bellard | |
1480 | 19cb3738 | bellard | /**
|
1481 | 19cb3738 | bellard | * If eject_flag is TRUE, eject the media. Otherwise, close the tray
|
1482 | 19cb3738 | bellard | */
|
1483 | 19cb3738 | bellard | void bdrv_eject(BlockDriverState *bs, int eject_flag) |
1484 | 19cb3738 | bellard | { |
1485 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1486 | 19cb3738 | bellard | int ret;
|
1487 | 19cb3738 | bellard | |
1488 | 19cb3738 | bellard | if (!drv || !drv->bdrv_eject) {
|
1489 | 19cb3738 | bellard | ret = -ENOTSUP; |
1490 | 19cb3738 | bellard | } else {
|
1491 | 19cb3738 | bellard | ret = drv->bdrv_eject(bs, eject_flag); |
1492 | 19cb3738 | bellard | } |
1493 | 19cb3738 | bellard | if (ret == -ENOTSUP) {
|
1494 | 19cb3738 | bellard | if (eject_flag)
|
1495 | 19cb3738 | bellard | bdrv_close(bs); |
1496 | 19cb3738 | bellard | } |
1497 | 19cb3738 | bellard | } |
1498 | 19cb3738 | bellard | |
1499 | 19cb3738 | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
1500 | 19cb3738 | bellard | { |
1501 | 19cb3738 | bellard | return bs->locked;
|
1502 | 19cb3738 | bellard | } |
1503 | 19cb3738 | bellard | |
1504 | 19cb3738 | bellard | /**
|
1505 | 19cb3738 | bellard | * Lock or unlock the media (if it is locked, the user won't be able
|
1506 | 19cb3738 | bellard | * to eject it manually).
|
1507 | 19cb3738 | bellard | */
|
1508 | 19cb3738 | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
1509 | 19cb3738 | bellard | { |
1510 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
1511 | 19cb3738 | bellard | |
1512 | 19cb3738 | bellard | bs->locked = locked; |
1513 | 19cb3738 | bellard | if (drv && drv->bdrv_set_locked) {
|
1514 | 19cb3738 | bellard | drv->bdrv_set_locked(bs, locked); |
1515 | 19cb3738 | bellard | } |
1516 | 19cb3738 | bellard | } |
1517 | 985a03b0 | ths | |
1518 | 985a03b0 | ths | /* needed for generic scsi interface */
|
1519 | 985a03b0 | ths | |
1520 | 985a03b0 | ths | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
1521 | 985a03b0 | ths | { |
1522 | 985a03b0 | ths | BlockDriver *drv = bs->drv; |
1523 | 985a03b0 | ths | |
1524 | 985a03b0 | ths | if (drv && drv->bdrv_ioctl)
|
1525 | 985a03b0 | ths | return drv->bdrv_ioctl(bs, req, buf);
|
1526 | 985a03b0 | ths | return -ENOTSUP;
|
1527 | 985a03b0 | ths | } |