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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 | faf07963 | pbrook | #include "qemu-common.h" |
26 | 376253ec | aliguori | #include "monitor.h" |
27 | ea2384d3 | bellard | #include "block_int.h" |
28 | 5efa9d5a | Anthony Liguori | #include "module.h" |
29 | d15e5465 | Luiz Capitulino | #include "qemu-objects.h" |
30 | fc01f7e7 | bellard | |
31 | 71e72a19 | Juan Quintela | #ifdef CONFIG_BSD
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32 | 7674e7bf | bellard | #include <sys/types.h> |
33 | 7674e7bf | bellard | #include <sys/stat.h> |
34 | 7674e7bf | bellard | #include <sys/ioctl.h> |
35 | 72cf2d4f | Blue Swirl | #include <sys/queue.h> |
36 | c5e97233 | blueswir1 | #ifndef __DragonFly__
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37 | 7674e7bf | bellard | #include <sys/disk.h> |
38 | 7674e7bf | bellard | #endif
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39 | c5e97233 | blueswir1 | #endif
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40 | 7674e7bf | bellard | |
41 | 49dc768d | aliguori | #ifdef _WIN32
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42 | 49dc768d | aliguori | #include <windows.h> |
43 | 49dc768d | aliguori | #endif
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44 | 49dc768d | aliguori | |
45 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
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46 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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47 | c87c0672 | aliguori | BlockDriverCompletionFunc *cb, void *opaque);
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48 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
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49 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
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50 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque);
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51 | b2e12bc6 | Christoph Hellwig | static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs,
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52 | b2e12bc6 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque);
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53 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
54 | 83f64091 | bellard | uint8_t *buf, int nb_sectors);
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55 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
56 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors); |
57 | 84a12e66 | Christoph Hellwig | static BlockDriver *find_protocol(const char *filename); |
58 | ec530c81 | bellard | |
59 | 1b7bdbc1 | Stefan Hajnoczi | static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
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60 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_HEAD_INITIALIZER(bdrv_states); |
61 | 7ee930d0 | blueswir1 | |
62 | 8a22f02a | Stefan Hajnoczi | static QLIST_HEAD(, BlockDriver) bdrv_drivers =
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63 | 8a22f02a | Stefan Hajnoczi | QLIST_HEAD_INITIALIZER(bdrv_drivers); |
64 | ea2384d3 | bellard | |
65 | eb852011 | Markus Armbruster | /* If non-zero, use only whitelisted block drivers */
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66 | eb852011 | Markus Armbruster | static int use_bdrv_whitelist; |
67 | eb852011 | Markus Armbruster | |
68 | 83f64091 | bellard | int path_is_absolute(const char *path) |
69 | 3b0d4f61 | bellard | { |
70 | 83f64091 | bellard | const char *p; |
71 | 21664424 | bellard | #ifdef _WIN32
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72 | 21664424 | bellard | /* specific case for names like: "\\.\d:" */
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73 | 21664424 | bellard | if (*path == '/' || *path == '\\') |
74 | 21664424 | bellard | return 1; |
75 | 21664424 | bellard | #endif
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76 | 83f64091 | bellard | p = strchr(path, ':');
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77 | 83f64091 | bellard | if (p)
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78 | 83f64091 | bellard | p++; |
79 | 83f64091 | bellard | else
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80 | 83f64091 | bellard | p = path; |
81 | 3b9f94e1 | bellard | #ifdef _WIN32
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82 | 3b9f94e1 | bellard | return (*p == '/' || *p == '\\'); |
83 | 3b9f94e1 | bellard | #else
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84 | 3b9f94e1 | bellard | return (*p == '/'); |
85 | 3b9f94e1 | bellard | #endif
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86 | 3b0d4f61 | bellard | } |
87 | 3b0d4f61 | bellard | |
88 | 83f64091 | bellard | /* if filename is absolute, just copy it to dest. Otherwise, build a
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89 | 83f64091 | bellard | path to it by considering it is relative to base_path. URL are
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90 | 83f64091 | bellard | supported. */
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91 | 83f64091 | bellard | void path_combine(char *dest, int dest_size, |
92 | 83f64091 | bellard | const char *base_path, |
93 | 83f64091 | bellard | const char *filename) |
94 | 3b0d4f61 | bellard | { |
95 | 83f64091 | bellard | const char *p, *p1; |
96 | 83f64091 | bellard | int len;
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97 | 83f64091 | bellard | |
98 | 83f64091 | bellard | if (dest_size <= 0) |
99 | 83f64091 | bellard | return;
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100 | 83f64091 | bellard | if (path_is_absolute(filename)) {
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101 | 83f64091 | bellard | pstrcpy(dest, dest_size, filename); |
102 | 83f64091 | bellard | } else {
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103 | 83f64091 | bellard | p = strchr(base_path, ':');
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104 | 83f64091 | bellard | if (p)
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105 | 83f64091 | bellard | p++; |
106 | 83f64091 | bellard | else
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107 | 83f64091 | bellard | p = base_path; |
108 | 3b9f94e1 | bellard | p1 = strrchr(base_path, '/');
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109 | 3b9f94e1 | bellard | #ifdef _WIN32
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110 | 3b9f94e1 | bellard | { |
111 | 3b9f94e1 | bellard | const char *p2; |
112 | 3b9f94e1 | bellard | p2 = strrchr(base_path, '\\');
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113 | 3b9f94e1 | bellard | if (!p1 || p2 > p1)
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114 | 3b9f94e1 | bellard | p1 = p2; |
115 | 3b9f94e1 | bellard | } |
116 | 3b9f94e1 | bellard | #endif
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117 | 83f64091 | bellard | if (p1)
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118 | 83f64091 | bellard | p1++; |
119 | 83f64091 | bellard | else
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120 | 83f64091 | bellard | p1 = base_path; |
121 | 83f64091 | bellard | if (p1 > p)
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122 | 83f64091 | bellard | p = p1; |
123 | 83f64091 | bellard | len = p - base_path; |
124 | 83f64091 | bellard | if (len > dest_size - 1) |
125 | 83f64091 | bellard | len = dest_size - 1;
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126 | 83f64091 | bellard | memcpy(dest, base_path, len); |
127 | 83f64091 | bellard | dest[len] = '\0';
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128 | 83f64091 | bellard | pstrcat(dest, dest_size, filename); |
129 | 3b0d4f61 | bellard | } |
130 | 3b0d4f61 | bellard | } |
131 | 3b0d4f61 | bellard | |
132 | 5efa9d5a | Anthony Liguori | void bdrv_register(BlockDriver *bdrv)
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133 | ea2384d3 | bellard | { |
134 | f141eafe | aliguori | if (!bdrv->bdrv_aio_readv) {
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135 | 83f64091 | bellard | /* add AIO emulation layer */
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136 | f141eafe | aliguori | bdrv->bdrv_aio_readv = bdrv_aio_readv_em; |
137 | f141eafe | aliguori | bdrv->bdrv_aio_writev = bdrv_aio_writev_em; |
138 | eda578e5 | aliguori | } else if (!bdrv->bdrv_read) { |
139 | 83f64091 | bellard | /* add synchronous IO emulation layer */
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140 | 83f64091 | bellard | bdrv->bdrv_read = bdrv_read_em; |
141 | 83f64091 | bellard | bdrv->bdrv_write = bdrv_write_em; |
142 | 83f64091 | bellard | } |
143 | b2e12bc6 | Christoph Hellwig | |
144 | b2e12bc6 | Christoph Hellwig | if (!bdrv->bdrv_aio_flush)
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145 | b2e12bc6 | Christoph Hellwig | bdrv->bdrv_aio_flush = bdrv_aio_flush_em; |
146 | b2e12bc6 | Christoph Hellwig | |
147 | 8a22f02a | Stefan Hajnoczi | QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list); |
148 | ea2384d3 | bellard | } |
149 | b338082b | bellard | |
150 | b338082b | bellard | /* create a new block device (by default it is empty) */
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151 | b338082b | bellard | BlockDriverState *bdrv_new(const char *device_name) |
152 | b338082b | bellard | { |
153 | 1b7bdbc1 | Stefan Hajnoczi | BlockDriverState *bs; |
154 | b338082b | bellard | |
155 | b338082b | bellard | bs = qemu_mallocz(sizeof(BlockDriverState));
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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 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_INSERT_TAIL(&bdrv_states, bs, list); |
159 | ea2384d3 | bellard | } |
160 | b338082b | bellard | return bs;
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161 | b338082b | bellard | } |
162 | b338082b | bellard | |
163 | ea2384d3 | bellard | BlockDriver *bdrv_find_format(const char *format_name) |
164 | ea2384d3 | bellard | { |
165 | ea2384d3 | bellard | BlockDriver *drv1; |
166 | 8a22f02a | Stefan Hajnoczi | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
167 | 8a22f02a | Stefan Hajnoczi | if (!strcmp(drv1->format_name, format_name)) {
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168 | ea2384d3 | bellard | return drv1;
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169 | 8a22f02a | Stefan Hajnoczi | } |
170 | ea2384d3 | bellard | } |
171 | ea2384d3 | bellard | return NULL; |
172 | ea2384d3 | bellard | } |
173 | ea2384d3 | bellard | |
174 | eb852011 | Markus Armbruster | static int bdrv_is_whitelisted(BlockDriver *drv) |
175 | eb852011 | Markus Armbruster | { |
176 | eb852011 | Markus Armbruster | static const char *whitelist[] = { |
177 | eb852011 | Markus Armbruster | CONFIG_BDRV_WHITELIST |
178 | eb852011 | Markus Armbruster | }; |
179 | eb852011 | Markus Armbruster | const char **p; |
180 | eb852011 | Markus Armbruster | |
181 | eb852011 | Markus Armbruster | if (!whitelist[0]) |
182 | eb852011 | Markus Armbruster | return 1; /* no whitelist, anything goes */ |
183 | eb852011 | Markus Armbruster | |
184 | eb852011 | Markus Armbruster | for (p = whitelist; *p; p++) {
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185 | eb852011 | Markus Armbruster | if (!strcmp(drv->format_name, *p)) {
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186 | eb852011 | Markus Armbruster | return 1; |
187 | eb852011 | Markus Armbruster | } |
188 | eb852011 | Markus Armbruster | } |
189 | eb852011 | Markus Armbruster | return 0; |
190 | eb852011 | Markus Armbruster | } |
191 | eb852011 | Markus Armbruster | |
192 | eb852011 | Markus Armbruster | BlockDriver *bdrv_find_whitelisted_format(const char *format_name) |
193 | eb852011 | Markus Armbruster | { |
194 | eb852011 | Markus Armbruster | BlockDriver *drv = bdrv_find_format(format_name); |
195 | eb852011 | Markus Armbruster | return drv && bdrv_is_whitelisted(drv) ? drv : NULL; |
196 | eb852011 | Markus Armbruster | } |
197 | eb852011 | Markus Armbruster | |
198 | 0e7e1989 | Kevin Wolf | int bdrv_create(BlockDriver *drv, const char* filename, |
199 | 0e7e1989 | Kevin Wolf | QEMUOptionParameter *options) |
200 | ea2384d3 | bellard | { |
201 | ea2384d3 | bellard | if (!drv->bdrv_create)
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202 | ea2384d3 | bellard | return -ENOTSUP;
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203 | 0e7e1989 | Kevin Wolf | |
204 | 0e7e1989 | Kevin Wolf | return drv->bdrv_create(filename, options);
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205 | ea2384d3 | bellard | } |
206 | ea2384d3 | bellard | |
207 | 84a12e66 | Christoph Hellwig | int bdrv_create_file(const char* filename, QEMUOptionParameter *options) |
208 | 84a12e66 | Christoph Hellwig | { |
209 | 84a12e66 | Christoph Hellwig | BlockDriver *drv; |
210 | 84a12e66 | Christoph Hellwig | |
211 | 84a12e66 | Christoph Hellwig | drv = find_protocol(filename); |
212 | 84a12e66 | Christoph Hellwig | if (drv == NULL) { |
213 | 84a12e66 | Christoph Hellwig | drv = bdrv_find_format("file");
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214 | 84a12e66 | Christoph Hellwig | } |
215 | 84a12e66 | Christoph Hellwig | |
216 | 84a12e66 | Christoph Hellwig | return bdrv_create(drv, filename, options);
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217 | 84a12e66 | Christoph Hellwig | } |
218 | 84a12e66 | Christoph Hellwig | |
219 | d5249393 | bellard | #ifdef _WIN32
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220 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
221 | d5249393 | bellard | { |
222 | 3b9f94e1 | bellard | char temp_dir[MAX_PATH];
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223 | 3b46e624 | ths | |
224 | 3b9f94e1 | bellard | GetTempPath(MAX_PATH, temp_dir); |
225 | 3b9f94e1 | bellard | GetTempFileName(temp_dir, "qem", 0, filename); |
226 | d5249393 | bellard | } |
227 | d5249393 | bellard | #else
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228 | 95389c86 | bellard | void get_tmp_filename(char *filename, int size) |
229 | fc01f7e7 | bellard | { |
230 | 67b915a5 | bellard | int fd;
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231 | 7ccfb2eb | blueswir1 | const char *tmpdir; |
232 | d5249393 | bellard | /* XXX: race condition possible */
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233 | 0badc1ee | aurel32 | tmpdir = getenv("TMPDIR");
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234 | 0badc1ee | aurel32 | if (!tmpdir)
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235 | 0badc1ee | aurel32 | tmpdir = "/tmp";
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236 | 0badc1ee | aurel32 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir);
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237 | ea2384d3 | bellard | fd = mkstemp(filename); |
238 | ea2384d3 | bellard | close(fd); |
239 | ea2384d3 | bellard | } |
240 | d5249393 | bellard | #endif
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241 | fc01f7e7 | bellard | |
242 | 19cb3738 | bellard | #ifdef _WIN32
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243 | f45512fe | bellard | static int is_windows_drive_prefix(const char *filename) |
244 | f45512fe | bellard | { |
245 | f45512fe | bellard | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
246 | f45512fe | bellard | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
247 | f45512fe | bellard | filename[1] == ':'); |
248 | f45512fe | bellard | } |
249 | 3b46e624 | ths | |
250 | 508c7cb3 | Christoph Hellwig | int is_windows_drive(const char *filename) |
251 | 19cb3738 | bellard | { |
252 | 5fafdf24 | ths | if (is_windows_drive_prefix(filename) &&
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253 | f45512fe | bellard | filename[2] == '\0') |
254 | 19cb3738 | bellard | return 1; |
255 | 19cb3738 | bellard | if (strstart(filename, "\\\\.\\", NULL) || |
256 | 19cb3738 | bellard | strstart(filename, "//./", NULL)) |
257 | 19cb3738 | bellard | return 1; |
258 | 19cb3738 | bellard | return 0; |
259 | 19cb3738 | bellard | } |
260 | 19cb3738 | bellard | #endif
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261 | 19cb3738 | bellard | |
262 | 84a12e66 | Christoph Hellwig | /*
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263 | 84a12e66 | Christoph Hellwig | * Detect host devices. By convention, /dev/cdrom[N] is always
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264 | 84a12e66 | Christoph Hellwig | * recognized as a host CDROM.
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265 | 84a12e66 | Christoph Hellwig | */
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266 | 84a12e66 | Christoph Hellwig | static BlockDriver *find_hdev_driver(const char *filename) |
267 | 84a12e66 | Christoph Hellwig | { |
268 | 84a12e66 | Christoph Hellwig | int score_max = 0, score; |
269 | 84a12e66 | Christoph Hellwig | BlockDriver *drv = NULL, *d;
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270 | 84a12e66 | Christoph Hellwig | |
271 | 84a12e66 | Christoph Hellwig | QLIST_FOREACH(d, &bdrv_drivers, list) { |
272 | 84a12e66 | Christoph Hellwig | if (d->bdrv_probe_device) {
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273 | 84a12e66 | Christoph Hellwig | score = d->bdrv_probe_device(filename); |
274 | 84a12e66 | Christoph Hellwig | if (score > score_max) {
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275 | 84a12e66 | Christoph Hellwig | score_max = score; |
276 | 84a12e66 | Christoph Hellwig | drv = d; |
277 | 84a12e66 | Christoph Hellwig | } |
278 | 84a12e66 | Christoph Hellwig | } |
279 | 84a12e66 | Christoph Hellwig | } |
280 | 84a12e66 | Christoph Hellwig | |
281 | 84a12e66 | Christoph Hellwig | return drv;
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282 | 84a12e66 | Christoph Hellwig | } |
283 | 84a12e66 | Christoph Hellwig | |
284 | 83f64091 | bellard | static BlockDriver *find_protocol(const char *filename) |
285 | 83f64091 | bellard | { |
286 | 83f64091 | bellard | BlockDriver *drv1; |
287 | 83f64091 | bellard | char protocol[128]; |
288 | 1cec71e3 | Anthony Liguori | int len;
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289 | 83f64091 | bellard | const char *p; |
290 | 20993081 | Kevin Wolf | int is_drive;
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291 | 19cb3738 | bellard | |
292 | 66f82cee | Kevin Wolf | /* TODO Drivers without bdrv_file_open must be specified explicitly */
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293 | 66f82cee | Kevin Wolf | |
294 | 19cb3738 | bellard | #ifdef _WIN32
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295 | 20993081 | Kevin Wolf | is_drive = is_windows_drive(filename) || |
296 | 20993081 | Kevin Wolf | is_windows_drive_prefix(filename); |
297 | 20993081 | Kevin Wolf | #else
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298 | 20993081 | Kevin Wolf | is_drive = 0;
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299 | 19cb3738 | bellard | #endif
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300 | 1cec71e3 | Anthony Liguori | p = strchr(filename, ':');
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301 | 20993081 | Kevin Wolf | if (!p || is_drive) {
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302 | 84a12e66 | Christoph Hellwig | drv1 = find_hdev_driver(filename); |
303 | 84a12e66 | Christoph Hellwig | if (!drv1) {
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304 | 84a12e66 | Christoph Hellwig | drv1 = bdrv_find_format("file");
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305 | 84a12e66 | Christoph Hellwig | } |
306 | 84a12e66 | Christoph Hellwig | return drv1;
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307 | 84a12e66 | Christoph Hellwig | } |
308 | 1cec71e3 | Anthony Liguori | len = p - filename; |
309 | 1cec71e3 | Anthony Liguori | if (len > sizeof(protocol) - 1) |
310 | 1cec71e3 | Anthony Liguori | len = sizeof(protocol) - 1; |
311 | 1cec71e3 | Anthony Liguori | memcpy(protocol, filename, len); |
312 | 1cec71e3 | Anthony Liguori | protocol[len] = '\0';
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313 | 8a22f02a | Stefan Hajnoczi | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
314 | 5fafdf24 | ths | if (drv1->protocol_name &&
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315 | 8a22f02a | Stefan Hajnoczi | !strcmp(drv1->protocol_name, protocol)) { |
316 | 83f64091 | bellard | return drv1;
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317 | 8a22f02a | Stefan Hajnoczi | } |
318 | 83f64091 | bellard | } |
319 | 83f64091 | bellard | return NULL; |
320 | 83f64091 | bellard | } |
321 | 83f64091 | bellard | |
322 | f3a5d3f8 | Christoph Hellwig | static BlockDriver *find_image_format(const char *filename) |
323 | f3a5d3f8 | Christoph Hellwig | { |
324 | f3a5d3f8 | Christoph Hellwig | int ret, score, score_max;
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325 | f3a5d3f8 | Christoph Hellwig | BlockDriver *drv1, *drv; |
326 | f3a5d3f8 | Christoph Hellwig | uint8_t buf[2048];
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327 | f3a5d3f8 | Christoph Hellwig | BlockDriverState *bs; |
328 | f3a5d3f8 | Christoph Hellwig | |
329 | f5edb014 | Naphtali Sprei | ret = bdrv_file_open(&bs, filename, 0);
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330 | 83f64091 | bellard | if (ret < 0) |
331 | 83f64091 | bellard | return NULL; |
332 | 83f64091 | bellard | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
333 | 83f64091 | bellard | bdrv_delete(bs); |
334 | 83f64091 | bellard | if (ret < 0) { |
335 | 83f64091 | bellard | return NULL; |
336 | 83f64091 | bellard | } |
337 | 83f64091 | bellard | |
338 | ea2384d3 | bellard | score_max = 0;
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339 | 84a12e66 | Christoph Hellwig | drv = NULL;
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340 | 8a22f02a | Stefan Hajnoczi | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
341 | 83f64091 | bellard | if (drv1->bdrv_probe) {
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342 | 83f64091 | bellard | score = drv1->bdrv_probe(buf, ret, filename); |
343 | 83f64091 | bellard | if (score > score_max) {
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344 | 83f64091 | bellard | score_max = score; |
345 | 83f64091 | bellard | drv = drv1; |
346 | 83f64091 | bellard | } |
347 | 0849bf08 | bellard | } |
348 | fc01f7e7 | bellard | } |
349 | ea2384d3 | bellard | return drv;
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350 | ea2384d3 | bellard | } |
351 | ea2384d3 | bellard | |
352 | 51762288 | Stefan Hajnoczi | /**
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353 | 51762288 | Stefan Hajnoczi | * Set the current 'total_sectors' value
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354 | 51762288 | Stefan Hajnoczi | */
|
355 | 51762288 | Stefan Hajnoczi | static int refresh_total_sectors(BlockDriverState *bs, int64_t hint) |
356 | 51762288 | Stefan Hajnoczi | { |
357 | 51762288 | Stefan Hajnoczi | BlockDriver *drv = bs->drv; |
358 | 51762288 | Stefan Hajnoczi | |
359 | 51762288 | Stefan Hajnoczi | /* query actual device if possible, otherwise just trust the hint */
|
360 | 51762288 | Stefan Hajnoczi | if (drv->bdrv_getlength) {
|
361 | 51762288 | Stefan Hajnoczi | int64_t length = drv->bdrv_getlength(bs); |
362 | 51762288 | Stefan Hajnoczi | if (length < 0) { |
363 | 51762288 | Stefan Hajnoczi | return length;
|
364 | 51762288 | Stefan Hajnoczi | } |
365 | 51762288 | Stefan Hajnoczi | hint = length >> BDRV_SECTOR_BITS; |
366 | 51762288 | Stefan Hajnoczi | } |
367 | 51762288 | Stefan Hajnoczi | |
368 | 51762288 | Stefan Hajnoczi | bs->total_sectors = hint; |
369 | 51762288 | Stefan Hajnoczi | return 0; |
370 | 51762288 | Stefan Hajnoczi | } |
371 | 51762288 | Stefan Hajnoczi | |
372 | b6ce07aa | Kevin Wolf | /*
|
373 | 57915332 | Kevin Wolf | * Common part for opening disk images and files
|
374 | 57915332 | Kevin Wolf | */
|
375 | 57915332 | Kevin Wolf | static int bdrv_open_common(BlockDriverState *bs, const char *filename, |
376 | 57915332 | Kevin Wolf | int flags, BlockDriver *drv)
|
377 | 57915332 | Kevin Wolf | { |
378 | 57915332 | Kevin Wolf | int ret, open_flags;
|
379 | 57915332 | Kevin Wolf | |
380 | 57915332 | Kevin Wolf | assert(drv != NULL);
|
381 | 57915332 | Kevin Wolf | |
382 | 66f82cee | Kevin Wolf | bs->file = NULL;
|
383 | 51762288 | Stefan Hajnoczi | bs->total_sectors = 0;
|
384 | 57915332 | Kevin Wolf | bs->is_temporary = 0;
|
385 | 57915332 | Kevin Wolf | bs->encrypted = 0;
|
386 | 57915332 | Kevin Wolf | bs->valid_key = 0;
|
387 | 57915332 | Kevin Wolf | bs->open_flags = flags; |
388 | 57915332 | Kevin Wolf | /* buffer_alignment defaulted to 512, drivers can change this value */
|
389 | 57915332 | Kevin Wolf | bs->buffer_alignment = 512;
|
390 | 57915332 | Kevin Wolf | |
391 | 57915332 | Kevin Wolf | pstrcpy(bs->filename, sizeof(bs->filename), filename);
|
392 | 57915332 | Kevin Wolf | |
393 | 57915332 | Kevin Wolf | if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) {
|
394 | 57915332 | Kevin Wolf | return -ENOTSUP;
|
395 | 57915332 | Kevin Wolf | } |
396 | 57915332 | Kevin Wolf | |
397 | 57915332 | Kevin Wolf | bs->drv = drv; |
398 | 57915332 | Kevin Wolf | bs->opaque = qemu_mallocz(drv->instance_size); |
399 | 57915332 | Kevin Wolf | |
400 | 57915332 | Kevin Wolf | /*
|
401 | 57915332 | Kevin Wolf | * Yes, BDRV_O_NOCACHE aka O_DIRECT means we have to present a
|
402 | 57915332 | Kevin Wolf | * write cache to the guest. We do need the fdatasync to flush
|
403 | 57915332 | Kevin Wolf | * out transactions for block allocations, and we maybe have a
|
404 | 57915332 | Kevin Wolf | * volatile write cache in our backing device to deal with.
|
405 | 57915332 | Kevin Wolf | */
|
406 | 57915332 | Kevin Wolf | if (flags & (BDRV_O_CACHE_WB|BDRV_O_NOCACHE))
|
407 | 57915332 | Kevin Wolf | bs->enable_write_cache = 1;
|
408 | 57915332 | Kevin Wolf | |
409 | 57915332 | Kevin Wolf | /*
|
410 | 57915332 | Kevin Wolf | * Clear flags that are internal to the block layer before opening the
|
411 | 57915332 | Kevin Wolf | * image.
|
412 | 57915332 | Kevin Wolf | */
|
413 | 57915332 | Kevin Wolf | open_flags = flags & ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); |
414 | 57915332 | Kevin Wolf | |
415 | 57915332 | Kevin Wolf | /*
|
416 | 57915332 | Kevin Wolf | * Snapshots should be writeable.
|
417 | 57915332 | Kevin Wolf | */
|
418 | 57915332 | Kevin Wolf | if (bs->is_temporary) {
|
419 | 57915332 | Kevin Wolf | open_flags |= BDRV_O_RDWR; |
420 | 57915332 | Kevin Wolf | } |
421 | 57915332 | Kevin Wolf | |
422 | 66f82cee | Kevin Wolf | /* Open the image, either directly or using a protocol */
|
423 | 66f82cee | Kevin Wolf | if (drv->bdrv_file_open) {
|
424 | 66f82cee | Kevin Wolf | ret = drv->bdrv_file_open(bs, filename, open_flags); |
425 | 66f82cee | Kevin Wolf | } else {
|
426 | 66f82cee | Kevin Wolf | ret = bdrv_file_open(&bs->file, filename, open_flags); |
427 | 66f82cee | Kevin Wolf | if (ret >= 0) { |
428 | 66f82cee | Kevin Wolf | ret = drv->bdrv_open(bs, open_flags); |
429 | 66f82cee | Kevin Wolf | } |
430 | 66f82cee | Kevin Wolf | } |
431 | 66f82cee | Kevin Wolf | |
432 | 57915332 | Kevin Wolf | if (ret < 0) { |
433 | 57915332 | Kevin Wolf | goto free_and_fail;
|
434 | 57915332 | Kevin Wolf | } |
435 | 57915332 | Kevin Wolf | |
436 | 57915332 | Kevin Wolf | bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR); |
437 | 51762288 | Stefan Hajnoczi | |
438 | 51762288 | Stefan Hajnoczi | ret = refresh_total_sectors(bs, bs->total_sectors); |
439 | 51762288 | Stefan Hajnoczi | if (ret < 0) { |
440 | 51762288 | Stefan Hajnoczi | goto free_and_fail;
|
441 | 57915332 | Kevin Wolf | } |
442 | 51762288 | Stefan Hajnoczi | |
443 | 57915332 | Kevin Wolf | #ifndef _WIN32
|
444 | 57915332 | Kevin Wolf | if (bs->is_temporary) {
|
445 | 57915332 | Kevin Wolf | unlink(filename); |
446 | 57915332 | Kevin Wolf | } |
447 | 57915332 | Kevin Wolf | #endif
|
448 | 57915332 | Kevin Wolf | return 0; |
449 | 57915332 | Kevin Wolf | |
450 | 57915332 | Kevin Wolf | free_and_fail:
|
451 | 66f82cee | Kevin Wolf | if (bs->file) {
|
452 | 66f82cee | Kevin Wolf | bdrv_delete(bs->file); |
453 | 66f82cee | Kevin Wolf | bs->file = NULL;
|
454 | 66f82cee | Kevin Wolf | } |
455 | 57915332 | Kevin Wolf | qemu_free(bs->opaque); |
456 | 57915332 | Kevin Wolf | bs->opaque = NULL;
|
457 | 57915332 | Kevin Wolf | bs->drv = NULL;
|
458 | 57915332 | Kevin Wolf | return ret;
|
459 | 57915332 | Kevin Wolf | } |
460 | 57915332 | Kevin Wolf | |
461 | 57915332 | Kevin Wolf | /*
|
462 | b6ce07aa | Kevin Wolf | * Opens a file using a protocol (file, host_device, nbd, ...)
|
463 | b6ce07aa | Kevin Wolf | */
|
464 | 83f64091 | bellard | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
465 | ea2384d3 | bellard | { |
466 | 83f64091 | bellard | BlockDriverState *bs; |
467 | 6db95603 | Christoph Hellwig | BlockDriver *drv; |
468 | 83f64091 | bellard | int ret;
|
469 | 83f64091 | bellard | |
470 | 6db95603 | Christoph Hellwig | drv = find_protocol(filename); |
471 | 6db95603 | Christoph Hellwig | if (!drv) {
|
472 | 6db95603 | Christoph Hellwig | return -ENOENT;
|
473 | 6db95603 | Christoph Hellwig | } |
474 | 6db95603 | Christoph Hellwig | |
475 | 83f64091 | bellard | bs = bdrv_new("");
|
476 | b6ce07aa | Kevin Wolf | ret = bdrv_open_common(bs, filename, flags, drv); |
477 | 83f64091 | bellard | if (ret < 0) { |
478 | 83f64091 | bellard | bdrv_delete(bs); |
479 | 83f64091 | bellard | return ret;
|
480 | 3b0d4f61 | bellard | } |
481 | 71d0770c | aliguori | bs->growable = 1;
|
482 | 83f64091 | bellard | *pbs = bs; |
483 | 83f64091 | bellard | return 0; |
484 | 83f64091 | bellard | } |
485 | 83f64091 | bellard | |
486 | b6ce07aa | Kevin Wolf | /*
|
487 | b6ce07aa | Kevin Wolf | * Opens a disk image (raw, qcow2, vmdk, ...)
|
488 | b6ce07aa | Kevin Wolf | */
|
489 | d6e9098e | Kevin Wolf | int bdrv_open(BlockDriverState *bs, const char *filename, int flags, |
490 | d6e9098e | Kevin Wolf | BlockDriver *drv) |
491 | ea2384d3 | bellard | { |
492 | b6ce07aa | Kevin Wolf | int ret;
|
493 | 712e7874 | bellard | |
494 | 83f64091 | bellard | if (flags & BDRV_O_SNAPSHOT) {
|
495 | ea2384d3 | bellard | BlockDriverState *bs1; |
496 | ea2384d3 | bellard | int64_t total_size; |
497 | 7c96d46e | aliguori | int is_protocol = 0; |
498 | 91a073a9 | Kevin Wolf | BlockDriver *bdrv_qcow2; |
499 | 91a073a9 | Kevin Wolf | QEMUOptionParameter *options; |
500 | b6ce07aa | Kevin Wolf | char tmp_filename[PATH_MAX];
|
501 | b6ce07aa | Kevin Wolf | char backing_filename[PATH_MAX];
|
502 | 3b46e624 | ths | |
503 | ea2384d3 | bellard | /* if snapshot, we create a temporary backing file and open it
|
504 | ea2384d3 | bellard | instead of opening 'filename' directly */
|
505 | 33e3963e | bellard | |
506 | ea2384d3 | bellard | /* if there is a backing file, use it */
|
507 | ea2384d3 | bellard | bs1 = bdrv_new("");
|
508 | d6e9098e | Kevin Wolf | ret = bdrv_open(bs1, filename, 0, drv);
|
509 | 51d7c00c | aliguori | if (ret < 0) { |
510 | ea2384d3 | bellard | bdrv_delete(bs1); |
511 | 51d7c00c | aliguori | return ret;
|
512 | ea2384d3 | bellard | } |
513 | 6ea44308 | Jan Kiszka | total_size = bdrv_getlength(bs1) >> BDRV_SECTOR_BITS; |
514 | 7c96d46e | aliguori | |
515 | 7c96d46e | aliguori | if (bs1->drv && bs1->drv->protocol_name)
|
516 | 7c96d46e | aliguori | is_protocol = 1;
|
517 | 7c96d46e | aliguori | |
518 | ea2384d3 | bellard | bdrv_delete(bs1); |
519 | 3b46e624 | ths | |
520 | ea2384d3 | bellard | get_tmp_filename(tmp_filename, sizeof(tmp_filename));
|
521 | 7c96d46e | aliguori | |
522 | 7c96d46e | aliguori | /* Real path is meaningless for protocols */
|
523 | 7c96d46e | aliguori | if (is_protocol)
|
524 | 7c96d46e | aliguori | snprintf(backing_filename, sizeof(backing_filename),
|
525 | 7c96d46e | aliguori | "%s", filename);
|
526 | 114cdfa9 | Kirill A. Shutemov | else if (!realpath(filename, backing_filename)) |
527 | 114cdfa9 | Kirill A. Shutemov | return -errno;
|
528 | 7c96d46e | aliguori | |
529 | 91a073a9 | Kevin Wolf | bdrv_qcow2 = bdrv_find_format("qcow2");
|
530 | 91a073a9 | Kevin Wolf | options = parse_option_parameters("", bdrv_qcow2->create_options, NULL); |
531 | 91a073a9 | Kevin Wolf | |
532 | 91a073a9 | Kevin Wolf | set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size * 512);
|
533 | 91a073a9 | Kevin Wolf | set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename); |
534 | 91a073a9 | Kevin Wolf | if (drv) {
|
535 | 91a073a9 | Kevin Wolf | set_option_parameter(options, BLOCK_OPT_BACKING_FMT, |
536 | 91a073a9 | Kevin Wolf | drv->format_name); |
537 | 91a073a9 | Kevin Wolf | } |
538 | 91a073a9 | Kevin Wolf | |
539 | 91a073a9 | Kevin Wolf | ret = bdrv_create(bdrv_qcow2, tmp_filename, options); |
540 | d748768c | Jan Kiszka | free_option_parameters(options); |
541 | 51d7c00c | aliguori | if (ret < 0) { |
542 | 51d7c00c | aliguori | return ret;
|
543 | ea2384d3 | bellard | } |
544 | 91a073a9 | Kevin Wolf | |
545 | ea2384d3 | bellard | filename = tmp_filename; |
546 | 91a073a9 | Kevin Wolf | drv = bdrv_qcow2; |
547 | ea2384d3 | bellard | bs->is_temporary = 1;
|
548 | ea2384d3 | bellard | } |
549 | 712e7874 | bellard | |
550 | b6ce07aa | Kevin Wolf | /* Find the right image format driver */
|
551 | 6db95603 | Christoph Hellwig | if (!drv) {
|
552 | 84a12e66 | Christoph Hellwig | drv = find_image_format(filename); |
553 | 51d7c00c | aliguori | } |
554 | 6987307c | Christoph Hellwig | |
555 | 51d7c00c | aliguori | if (!drv) {
|
556 | 51d7c00c | aliguori | ret = -ENOENT; |
557 | 51d7c00c | aliguori | goto unlink_and_fail;
|
558 | ea2384d3 | bellard | } |
559 | b6ce07aa | Kevin Wolf | |
560 | b6ce07aa | Kevin Wolf | /* Open the image */
|
561 | b6ce07aa | Kevin Wolf | ret = bdrv_open_common(bs, filename, flags, drv); |
562 | b6ce07aa | Kevin Wolf | if (ret < 0) { |
563 | 6987307c | Christoph Hellwig | goto unlink_and_fail;
|
564 | 6987307c | Christoph Hellwig | } |
565 | 6987307c | Christoph Hellwig | |
566 | b6ce07aa | Kevin Wolf | /* If there is a backing file, use it */
|
567 | b6ce07aa | Kevin Wolf | if ((flags & BDRV_O_NO_BACKING) == 0 && bs->backing_file[0] != '\0') { |
568 | b6ce07aa | Kevin Wolf | char backing_filename[PATH_MAX];
|
569 | b6ce07aa | Kevin Wolf | int back_flags;
|
570 | b6ce07aa | Kevin Wolf | BlockDriver *back_drv = NULL;
|
571 | b6ce07aa | Kevin Wolf | |
572 | b6ce07aa | Kevin Wolf | bs->backing_hd = bdrv_new("");
|
573 | b6ce07aa | Kevin Wolf | path_combine(backing_filename, sizeof(backing_filename),
|
574 | b6ce07aa | Kevin Wolf | filename, bs->backing_file); |
575 | b6ce07aa | Kevin Wolf | if (bs->backing_format[0] != '\0') |
576 | b6ce07aa | Kevin Wolf | back_drv = bdrv_find_format(bs->backing_format); |
577 | b6ce07aa | Kevin Wolf | |
578 | b6ce07aa | Kevin Wolf | /* backing files always opened read-only */
|
579 | b6ce07aa | Kevin Wolf | back_flags = |
580 | b6ce07aa | Kevin Wolf | flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); |
581 | b6ce07aa | Kevin Wolf | |
582 | b6ce07aa | Kevin Wolf | ret = bdrv_open(bs->backing_hd, backing_filename, back_flags, back_drv); |
583 | b6ce07aa | Kevin Wolf | if (ret < 0) { |
584 | b6ce07aa | Kevin Wolf | bdrv_close(bs); |
585 | b6ce07aa | Kevin Wolf | return ret;
|
586 | b6ce07aa | Kevin Wolf | } |
587 | b6ce07aa | Kevin Wolf | if (bs->is_temporary) {
|
588 | b6ce07aa | Kevin Wolf | bs->backing_hd->keep_read_only = !(flags & BDRV_O_RDWR); |
589 | b6ce07aa | Kevin Wolf | } else {
|
590 | b6ce07aa | Kevin Wolf | /* base image inherits from "parent" */
|
591 | b6ce07aa | Kevin Wolf | bs->backing_hd->keep_read_only = bs->keep_read_only; |
592 | b6ce07aa | Kevin Wolf | } |
593 | b6ce07aa | Kevin Wolf | } |
594 | b6ce07aa | Kevin Wolf | |
595 | b6ce07aa | Kevin Wolf | if (!bdrv_key_required(bs)) {
|
596 | b6ce07aa | Kevin Wolf | /* call the change callback */
|
597 | b6ce07aa | Kevin Wolf | bs->media_changed = 1;
|
598 | b6ce07aa | Kevin Wolf | if (bs->change_cb)
|
599 | b6ce07aa | Kevin Wolf | bs->change_cb(bs->change_opaque); |
600 | b6ce07aa | Kevin Wolf | } |
601 | b6ce07aa | Kevin Wolf | |
602 | b6ce07aa | Kevin Wolf | return 0; |
603 | b6ce07aa | Kevin Wolf | |
604 | b6ce07aa | Kevin Wolf | unlink_and_fail:
|
605 | b6ce07aa | Kevin Wolf | if (bs->is_temporary) {
|
606 | b6ce07aa | Kevin Wolf | unlink(filename); |
607 | b6ce07aa | Kevin Wolf | } |
608 | b6ce07aa | Kevin Wolf | return ret;
|
609 | b6ce07aa | Kevin Wolf | } |
610 | b6ce07aa | Kevin Wolf | |
611 | fc01f7e7 | bellard | void bdrv_close(BlockDriverState *bs)
|
612 | fc01f7e7 | bellard | { |
613 | 19cb3738 | bellard | if (bs->drv) {
|
614 | 557df6ac | Stefan Hajnoczi | if (bs->backing_hd) {
|
615 | ea2384d3 | bellard | bdrv_delete(bs->backing_hd); |
616 | 557df6ac | Stefan Hajnoczi | bs->backing_hd = NULL;
|
617 | 557df6ac | Stefan Hajnoczi | } |
618 | ea2384d3 | bellard | bs->drv->bdrv_close(bs); |
619 | ea2384d3 | bellard | qemu_free(bs->opaque); |
620 | ea2384d3 | bellard | #ifdef _WIN32
|
621 | ea2384d3 | bellard | if (bs->is_temporary) {
|
622 | ea2384d3 | bellard | unlink(bs->filename); |
623 | ea2384d3 | bellard | } |
624 | 67b915a5 | bellard | #endif
|
625 | ea2384d3 | bellard | bs->opaque = NULL;
|
626 | ea2384d3 | bellard | bs->drv = NULL;
|
627 | b338082b | bellard | |
628 | 66f82cee | Kevin Wolf | if (bs->file != NULL) { |
629 | 66f82cee | Kevin Wolf | bdrv_close(bs->file); |
630 | 66f82cee | Kevin Wolf | } |
631 | 66f82cee | Kevin Wolf | |
632 | b338082b | bellard | /* call the change callback */
|
633 | 19cb3738 | bellard | bs->media_changed = 1;
|
634 | b338082b | bellard | if (bs->change_cb)
|
635 | b338082b | bellard | bs->change_cb(bs->change_opaque); |
636 | b338082b | bellard | } |
637 | b338082b | bellard | } |
638 | b338082b | bellard | |
639 | b338082b | bellard | void bdrv_delete(BlockDriverState *bs)
|
640 | b338082b | bellard | { |
641 | 1b7bdbc1 | Stefan Hajnoczi | /* remove from list, if necessary */
|
642 | 1b7bdbc1 | Stefan Hajnoczi | if (bs->device_name[0] != '\0') { |
643 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_REMOVE(&bdrv_states, bs, list); |
644 | 1b7bdbc1 | Stefan Hajnoczi | } |
645 | 34c6f050 | aurel32 | |
646 | b338082b | bellard | bdrv_close(bs); |
647 | 66f82cee | Kevin Wolf | if (bs->file != NULL) { |
648 | 66f82cee | Kevin Wolf | bdrv_delete(bs->file); |
649 | 66f82cee | Kevin Wolf | } |
650 | 66f82cee | Kevin Wolf | |
651 | b338082b | bellard | qemu_free(bs); |
652 | fc01f7e7 | bellard | } |
653 | fc01f7e7 | bellard | |
654 | e97fc193 | aliguori | /*
|
655 | e97fc193 | aliguori | * Run consistency checks on an image
|
656 | e97fc193 | aliguori | *
|
657 | e97fc193 | aliguori | * Returns the number of errors or -errno when an internal error occurs
|
658 | e97fc193 | aliguori | */
|
659 | e97fc193 | aliguori | int bdrv_check(BlockDriverState *bs)
|
660 | e97fc193 | aliguori | { |
661 | e97fc193 | aliguori | if (bs->drv->bdrv_check == NULL) { |
662 | e97fc193 | aliguori | return -ENOTSUP;
|
663 | e97fc193 | aliguori | } |
664 | e97fc193 | aliguori | |
665 | e97fc193 | aliguori | return bs->drv->bdrv_check(bs);
|
666 | e97fc193 | aliguori | } |
667 | e97fc193 | aliguori | |
668 | 33e3963e | bellard | /* commit COW file into the raw image */
|
669 | 33e3963e | bellard | int bdrv_commit(BlockDriverState *bs)
|
670 | 33e3963e | bellard | { |
671 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
672 | 83f64091 | bellard | int64_t i, total_sectors; |
673 | 4dca4b63 | Naphtali Sprei | int n, j, ro, open_flags;
|
674 | 4dca4b63 | Naphtali Sprei | int ret = 0, rw_ret = 0; |
675 | ea2384d3 | bellard | unsigned char sector[512]; |
676 | 4dca4b63 | Naphtali Sprei | char filename[1024]; |
677 | 4dca4b63 | Naphtali Sprei | BlockDriverState *bs_rw, *bs_ro; |
678 | 33e3963e | bellard | |
679 | 19cb3738 | bellard | if (!drv)
|
680 | 19cb3738 | bellard | return -ENOMEDIUM;
|
681 | 4dca4b63 | Naphtali Sprei | |
682 | 4dca4b63 | Naphtali Sprei | if (!bs->backing_hd) {
|
683 | 4dca4b63 | Naphtali Sprei | return -ENOTSUP;
|
684 | 33e3963e | bellard | } |
685 | 33e3963e | bellard | |
686 | 4dca4b63 | Naphtali Sprei | if (bs->backing_hd->keep_read_only) {
|
687 | 4dca4b63 | Naphtali Sprei | return -EACCES;
|
688 | 4dca4b63 | Naphtali Sprei | } |
689 | 4dca4b63 | Naphtali Sprei | |
690 | 4dca4b63 | Naphtali Sprei | ro = bs->backing_hd->read_only; |
691 | 4dca4b63 | Naphtali Sprei | strncpy(filename, bs->backing_hd->filename, sizeof(filename));
|
692 | 4dca4b63 | Naphtali Sprei | open_flags = bs->backing_hd->open_flags; |
693 | 4dca4b63 | Naphtali Sprei | |
694 | 4dca4b63 | Naphtali Sprei | if (ro) {
|
695 | 4dca4b63 | Naphtali Sprei | /* re-open as RW */
|
696 | 4dca4b63 | Naphtali Sprei | bdrv_delete(bs->backing_hd); |
697 | 4dca4b63 | Naphtali Sprei | bs->backing_hd = NULL;
|
698 | 4dca4b63 | Naphtali Sprei | bs_rw = bdrv_new("");
|
699 | c3349197 | Kevin Wolf | rw_ret = bdrv_open(bs_rw, filename, open_flags | BDRV_O_RDWR, drv); |
700 | 4dca4b63 | Naphtali Sprei | if (rw_ret < 0) { |
701 | 4dca4b63 | Naphtali Sprei | bdrv_delete(bs_rw); |
702 | 4dca4b63 | Naphtali Sprei | /* try to re-open read-only */
|
703 | 4dca4b63 | Naphtali Sprei | bs_ro = bdrv_new("");
|
704 | c3349197 | Kevin Wolf | ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, drv); |
705 | 4dca4b63 | Naphtali Sprei | if (ret < 0) { |
706 | 4dca4b63 | Naphtali Sprei | bdrv_delete(bs_ro); |
707 | 4dca4b63 | Naphtali Sprei | /* drive not functional anymore */
|
708 | 4dca4b63 | Naphtali Sprei | bs->drv = NULL;
|
709 | 4dca4b63 | Naphtali Sprei | return ret;
|
710 | 4dca4b63 | Naphtali Sprei | } |
711 | 4dca4b63 | Naphtali Sprei | bs->backing_hd = bs_ro; |
712 | 4dca4b63 | Naphtali Sprei | return rw_ret;
|
713 | 4dca4b63 | Naphtali Sprei | } |
714 | 4dca4b63 | Naphtali Sprei | bs->backing_hd = bs_rw; |
715 | ea2384d3 | bellard | } |
716 | 33e3963e | bellard | |
717 | 6ea44308 | Jan Kiszka | total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
718 | 83f64091 | bellard | for (i = 0; i < total_sectors;) { |
719 | 19cb3738 | bellard | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
720 | ea2384d3 | bellard | for(j = 0; j < n; j++) { |
721 | ea2384d3 | bellard | if (bdrv_read(bs, i, sector, 1) != 0) { |
722 | 4dca4b63 | Naphtali Sprei | ret = -EIO; |
723 | 4dca4b63 | Naphtali Sprei | goto ro_cleanup;
|
724 | ea2384d3 | bellard | } |
725 | ea2384d3 | bellard | |
726 | ea2384d3 | bellard | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
727 | 4dca4b63 | Naphtali Sprei | ret = -EIO; |
728 | 4dca4b63 | Naphtali Sprei | goto ro_cleanup;
|
729 | ea2384d3 | bellard | } |
730 | ea2384d3 | bellard | i++; |
731 | 33e3963e | bellard | } |
732 | ea2384d3 | bellard | } else {
|
733 | ea2384d3 | bellard | i += n; |
734 | ea2384d3 | bellard | } |
735 | 33e3963e | bellard | } |
736 | 95389c86 | bellard | |
737 | 1d44952f | Christoph Hellwig | if (drv->bdrv_make_empty) {
|
738 | 1d44952f | Christoph Hellwig | ret = drv->bdrv_make_empty(bs); |
739 | 1d44952f | Christoph Hellwig | bdrv_flush(bs); |
740 | 1d44952f | Christoph Hellwig | } |
741 | 95389c86 | bellard | |
742 | 3f5075ae | Christoph Hellwig | /*
|
743 | 3f5075ae | Christoph Hellwig | * Make sure all data we wrote to the backing device is actually
|
744 | 3f5075ae | Christoph Hellwig | * stable on disk.
|
745 | 3f5075ae | Christoph Hellwig | */
|
746 | 3f5075ae | Christoph Hellwig | if (bs->backing_hd)
|
747 | 3f5075ae | Christoph Hellwig | bdrv_flush(bs->backing_hd); |
748 | 4dca4b63 | Naphtali Sprei | |
749 | 4dca4b63 | Naphtali Sprei | ro_cleanup:
|
750 | 4dca4b63 | Naphtali Sprei | |
751 | 4dca4b63 | Naphtali Sprei | if (ro) {
|
752 | 4dca4b63 | Naphtali Sprei | /* re-open as RO */
|
753 | 4dca4b63 | Naphtali Sprei | bdrv_delete(bs->backing_hd); |
754 | 4dca4b63 | Naphtali Sprei | bs->backing_hd = NULL;
|
755 | 4dca4b63 | Naphtali Sprei | bs_ro = bdrv_new("");
|
756 | c3349197 | Kevin Wolf | ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, drv); |
757 | 4dca4b63 | Naphtali Sprei | if (ret < 0) { |
758 | 4dca4b63 | Naphtali Sprei | bdrv_delete(bs_ro); |
759 | 4dca4b63 | Naphtali Sprei | /* drive not functional anymore */
|
760 | 4dca4b63 | Naphtali Sprei | bs->drv = NULL;
|
761 | 4dca4b63 | Naphtali Sprei | return ret;
|
762 | 4dca4b63 | Naphtali Sprei | } |
763 | 4dca4b63 | Naphtali Sprei | bs->backing_hd = bs_ro; |
764 | 4dca4b63 | Naphtali Sprei | bs->backing_hd->keep_read_only = 0;
|
765 | 4dca4b63 | Naphtali Sprei | } |
766 | 4dca4b63 | Naphtali Sprei | |
767 | 1d44952f | Christoph Hellwig | return ret;
|
768 | 33e3963e | bellard | } |
769 | 33e3963e | bellard | |
770 | 756e6736 | Kevin Wolf | /*
|
771 | 756e6736 | Kevin Wolf | * Return values:
|
772 | 756e6736 | Kevin Wolf | * 0 - success
|
773 | 756e6736 | Kevin Wolf | * -EINVAL - backing format specified, but no file
|
774 | 756e6736 | Kevin Wolf | * -ENOSPC - can't update the backing file because no space is left in the
|
775 | 756e6736 | Kevin Wolf | * image file header
|
776 | 756e6736 | Kevin Wolf | * -ENOTSUP - format driver doesn't support changing the backing file
|
777 | 756e6736 | Kevin Wolf | */
|
778 | 756e6736 | Kevin Wolf | int bdrv_change_backing_file(BlockDriverState *bs,
|
779 | 756e6736 | Kevin Wolf | const char *backing_file, const char *backing_fmt) |
780 | 756e6736 | Kevin Wolf | { |
781 | 756e6736 | Kevin Wolf | BlockDriver *drv = bs->drv; |
782 | 756e6736 | Kevin Wolf | |
783 | 756e6736 | Kevin Wolf | if (drv->bdrv_change_backing_file != NULL) { |
784 | 756e6736 | Kevin Wolf | return drv->bdrv_change_backing_file(bs, backing_file, backing_fmt);
|
785 | 756e6736 | Kevin Wolf | } else {
|
786 | 756e6736 | Kevin Wolf | return -ENOTSUP;
|
787 | 756e6736 | Kevin Wolf | } |
788 | 756e6736 | Kevin Wolf | } |
789 | 756e6736 | Kevin Wolf | |
790 | 71d0770c | aliguori | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
791 | 71d0770c | aliguori | size_t size) |
792 | 71d0770c | aliguori | { |
793 | 71d0770c | aliguori | int64_t len; |
794 | 71d0770c | aliguori | |
795 | 71d0770c | aliguori | if (!bdrv_is_inserted(bs))
|
796 | 71d0770c | aliguori | return -ENOMEDIUM;
|
797 | 71d0770c | aliguori | |
798 | 71d0770c | aliguori | if (bs->growable)
|
799 | 71d0770c | aliguori | return 0; |
800 | 71d0770c | aliguori | |
801 | 71d0770c | aliguori | len = bdrv_getlength(bs); |
802 | 71d0770c | aliguori | |
803 | fbb7b4e0 | Kevin Wolf | if (offset < 0) |
804 | fbb7b4e0 | Kevin Wolf | return -EIO;
|
805 | fbb7b4e0 | Kevin Wolf | |
806 | fbb7b4e0 | Kevin Wolf | if ((offset > len) || (len - offset < size))
|
807 | 71d0770c | aliguori | return -EIO;
|
808 | 71d0770c | aliguori | |
809 | 71d0770c | aliguori | return 0; |
810 | 71d0770c | aliguori | } |
811 | 71d0770c | aliguori | |
812 | 71d0770c | aliguori | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, |
813 | 71d0770c | aliguori | int nb_sectors)
|
814 | 71d0770c | aliguori | { |
815 | 999dec57 | aliguori | return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512); |
816 | 71d0770c | aliguori | } |
817 | 71d0770c | aliguori | |
818 | 19cb3738 | bellard | /* return < 0 if error. See bdrv_write() for the return codes */
|
819 | 5fafdf24 | ths | int bdrv_read(BlockDriverState *bs, int64_t sector_num,
|
820 | fc01f7e7 | bellard | uint8_t *buf, int nb_sectors)
|
821 | fc01f7e7 | bellard | { |
822 | ea2384d3 | bellard | BlockDriver *drv = bs->drv; |
823 | ea2384d3 | bellard | |
824 | 19cb3738 | bellard | if (!drv)
|
825 | 19cb3738 | bellard | return -ENOMEDIUM;
|
826 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
827 | 71d0770c | aliguori | return -EIO;
|
828 | b338082b | bellard | |
829 | eda578e5 | aliguori | return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
|
830 | fc01f7e7 | bellard | } |
831 | fc01f7e7 | bellard | |
832 | 7cd1e32a | lirans@il.ibm.com | static void set_dirty_bitmap(BlockDriverState *bs, int64_t sector_num, |
833 | a55eb92c | Jan Kiszka | int nb_sectors, int dirty) |
834 | 7cd1e32a | lirans@il.ibm.com | { |
835 | 7cd1e32a | lirans@il.ibm.com | int64_t start, end; |
836 | c6d22830 | Jan Kiszka | unsigned long val, idx, bit; |
837 | a55eb92c | Jan Kiszka | |
838 | 6ea44308 | Jan Kiszka | start = sector_num / BDRV_SECTORS_PER_DIRTY_CHUNK; |
839 | c6d22830 | Jan Kiszka | end = (sector_num + nb_sectors - 1) / BDRV_SECTORS_PER_DIRTY_CHUNK;
|
840 | a55eb92c | Jan Kiszka | |
841 | a55eb92c | Jan Kiszka | for (; start <= end; start++) {
|
842 | c6d22830 | Jan Kiszka | idx = start / (sizeof(unsigned long) * 8); |
843 | c6d22830 | Jan Kiszka | bit = start % (sizeof(unsigned long) * 8); |
844 | c6d22830 | Jan Kiszka | val = bs->dirty_bitmap[idx]; |
845 | c6d22830 | Jan Kiszka | if (dirty) {
|
846 | aaa0eb75 | Liran Schour | if (!(val & (1 << bit))) { |
847 | aaa0eb75 | Liran Schour | bs->dirty_count++; |
848 | aaa0eb75 | Liran Schour | val |= 1 << bit;
|
849 | aaa0eb75 | Liran Schour | } |
850 | c6d22830 | Jan Kiszka | } else {
|
851 | aaa0eb75 | Liran Schour | if (val & (1 << bit)) { |
852 | aaa0eb75 | Liran Schour | bs->dirty_count--; |
853 | aaa0eb75 | Liran Schour | val &= ~(1 << bit);
|
854 | aaa0eb75 | Liran Schour | } |
855 | c6d22830 | Jan Kiszka | } |
856 | c6d22830 | Jan Kiszka | bs->dirty_bitmap[idx] = val; |
857 | 7cd1e32a | lirans@il.ibm.com | } |
858 | 7cd1e32a | lirans@il.ibm.com | } |
859 | 7cd1e32a | lirans@il.ibm.com | |
860 | 5fafdf24 | ths | /* Return < 0 if error. Important errors are:
|
861 | 19cb3738 | bellard | -EIO generic I/O error (may happen for all errors)
|
862 | 19cb3738 | bellard | -ENOMEDIUM No media inserted.
|
863 | 19cb3738 | bellard | -EINVAL Invalid sector number or nb_sectors
|
864 | 19cb3738 | bellard | -EACCES Trying to write a read-only device
|
865 | 19cb3738 | bellard | */
|
866 | 5fafdf24 | ths | int bdrv_write(BlockDriverState *bs, int64_t sector_num,
|
867 | fc01f7e7 | bellard | const uint8_t *buf, int nb_sectors) |
868 | fc01f7e7 | bellard | { |
869 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
870 | 19cb3738 | bellard | if (!bs->drv)
|
871 | 19cb3738 | bellard | return -ENOMEDIUM;
|
872 | 0849bf08 | bellard | if (bs->read_only)
|
873 | 19cb3738 | bellard | return -EACCES;
|
874 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
875 | 71d0770c | aliguori | return -EIO;
|
876 | a55eb92c | Jan Kiszka | |
877 | c6d22830 | Jan Kiszka | if (bs->dirty_bitmap) {
|
878 | 7cd1e32a | lirans@il.ibm.com | set_dirty_bitmap(bs, sector_num, nb_sectors, 1);
|
879 | 7cd1e32a | lirans@il.ibm.com | } |
880 | a55eb92c | Jan Kiszka | |
881 | 294cc35f | Kevin Wolf | if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { |
882 | 294cc35f | Kevin Wolf | bs->wr_highest_sector = sector_num + nb_sectors - 1;
|
883 | 294cc35f | Kevin Wolf | } |
884 | 294cc35f | Kevin Wolf | |
885 | 42fb2807 | aliguori | return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
|
886 | 83f64091 | bellard | } |
887 | 83f64091 | bellard | |
888 | eda578e5 | aliguori | int bdrv_pread(BlockDriverState *bs, int64_t offset,
|
889 | eda578e5 | aliguori | void *buf, int count1) |
890 | 83f64091 | bellard | { |
891 | 6ea44308 | Jan Kiszka | uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
892 | 83f64091 | bellard | int len, nb_sectors, count;
|
893 | 83f64091 | bellard | int64_t sector_num; |
894 | 9a8c4cce | Kevin Wolf | int ret;
|
895 | 83f64091 | bellard | |
896 | 83f64091 | bellard | count = count1; |
897 | 83f64091 | bellard | /* first read to align to sector start */
|
898 | 6ea44308 | Jan Kiszka | len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1);
|
899 | 83f64091 | bellard | if (len > count)
|
900 | 83f64091 | bellard | len = count; |
901 | 6ea44308 | Jan Kiszka | sector_num = offset >> BDRV_SECTOR_BITS; |
902 | 83f64091 | bellard | if (len > 0) { |
903 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
904 | 9a8c4cce | Kevin Wolf | return ret;
|
905 | 6ea44308 | Jan Kiszka | memcpy(buf, tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), len);
|
906 | 83f64091 | bellard | count -= len; |
907 | 83f64091 | bellard | if (count == 0) |
908 | 83f64091 | bellard | return count1;
|
909 | 83f64091 | bellard | sector_num++; |
910 | 83f64091 | bellard | buf += len; |
911 | 83f64091 | bellard | } |
912 | 83f64091 | bellard | |
913 | 83f64091 | bellard | /* read the sectors "in place" */
|
914 | 6ea44308 | Jan Kiszka | nb_sectors = count >> BDRV_SECTOR_BITS; |
915 | 83f64091 | bellard | if (nb_sectors > 0) { |
916 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_read(bs, sector_num, buf, nb_sectors)) < 0) |
917 | 9a8c4cce | Kevin Wolf | return ret;
|
918 | 83f64091 | bellard | sector_num += nb_sectors; |
919 | 6ea44308 | Jan Kiszka | len = nb_sectors << BDRV_SECTOR_BITS; |
920 | 83f64091 | bellard | buf += len; |
921 | 83f64091 | bellard | count -= len; |
922 | 83f64091 | bellard | } |
923 | 83f64091 | bellard | |
924 | 83f64091 | bellard | /* add data from the last sector */
|
925 | 83f64091 | bellard | if (count > 0) { |
926 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
927 | 9a8c4cce | Kevin Wolf | return ret;
|
928 | 83f64091 | bellard | memcpy(buf, tmp_buf, count); |
929 | 83f64091 | bellard | } |
930 | 83f64091 | bellard | return count1;
|
931 | 83f64091 | bellard | } |
932 | 83f64091 | bellard | |
933 | eda578e5 | aliguori | int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
|
934 | eda578e5 | aliguori | const void *buf, int count1) |
935 | 83f64091 | bellard | { |
936 | 6ea44308 | Jan Kiszka | uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
937 | 83f64091 | bellard | int len, nb_sectors, count;
|
938 | 83f64091 | bellard | int64_t sector_num; |
939 | 9a8c4cce | Kevin Wolf | int ret;
|
940 | 83f64091 | bellard | |
941 | 83f64091 | bellard | count = count1; |
942 | 83f64091 | bellard | /* first write to align to sector start */
|
943 | 6ea44308 | Jan Kiszka | len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1);
|
944 | 83f64091 | bellard | if (len > count)
|
945 | 83f64091 | bellard | len = count; |
946 | 6ea44308 | Jan Kiszka | sector_num = offset >> BDRV_SECTOR_BITS; |
947 | 83f64091 | bellard | if (len > 0) { |
948 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
949 | 9a8c4cce | Kevin Wolf | return ret;
|
950 | 6ea44308 | Jan Kiszka | memcpy(tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), buf, len);
|
951 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
952 | 9a8c4cce | Kevin Wolf | return ret;
|
953 | 83f64091 | bellard | count -= len; |
954 | 83f64091 | bellard | if (count == 0) |
955 | 83f64091 | bellard | return count1;
|
956 | 83f64091 | bellard | sector_num++; |
957 | 83f64091 | bellard | buf += len; |
958 | 83f64091 | bellard | } |
959 | 83f64091 | bellard | |
960 | 83f64091 | bellard | /* write the sectors "in place" */
|
961 | 6ea44308 | Jan Kiszka | nb_sectors = count >> BDRV_SECTOR_BITS; |
962 | 83f64091 | bellard | if (nb_sectors > 0) { |
963 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_write(bs, sector_num, buf, nb_sectors)) < 0) |
964 | 9a8c4cce | Kevin Wolf | return ret;
|
965 | 83f64091 | bellard | sector_num += nb_sectors; |
966 | 6ea44308 | Jan Kiszka | len = nb_sectors << BDRV_SECTOR_BITS; |
967 | 83f64091 | bellard | buf += len; |
968 | 83f64091 | bellard | count -= len; |
969 | 83f64091 | bellard | } |
970 | 83f64091 | bellard | |
971 | 83f64091 | bellard | /* add data from the last sector */
|
972 | 83f64091 | bellard | if (count > 0) { |
973 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
974 | 9a8c4cce | Kevin Wolf | return ret;
|
975 | 83f64091 | bellard | memcpy(tmp_buf, buf, count); |
976 | 9a8c4cce | Kevin Wolf | if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
977 | 9a8c4cce | Kevin Wolf | return ret;
|
978 | 83f64091 | bellard | } |
979 | 83f64091 | bellard | return count1;
|
980 | 83f64091 | bellard | } |
981 | 83f64091 | bellard | |
982 | 83f64091 | bellard | /**
|
983 | 83f64091 | bellard | * Truncate file to 'offset' bytes (needed only for file protocols)
|
984 | 83f64091 | bellard | */
|
985 | 83f64091 | bellard | int bdrv_truncate(BlockDriverState *bs, int64_t offset)
|
986 | 83f64091 | bellard | { |
987 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
988 | 51762288 | Stefan Hajnoczi | int ret;
|
989 | 83f64091 | bellard | if (!drv)
|
990 | 19cb3738 | bellard | return -ENOMEDIUM;
|
991 | 83f64091 | bellard | if (!drv->bdrv_truncate)
|
992 | 83f64091 | bellard | return -ENOTSUP;
|
993 | 59f2689d | Naphtali Sprei | if (bs->read_only)
|
994 | 59f2689d | Naphtali Sprei | return -EACCES;
|
995 | 51762288 | Stefan Hajnoczi | ret = drv->bdrv_truncate(bs, offset); |
996 | 51762288 | Stefan Hajnoczi | if (ret == 0) { |
997 | 51762288 | Stefan Hajnoczi | ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); |
998 | 51762288 | Stefan Hajnoczi | } |
999 | 51762288 | Stefan Hajnoczi | return ret;
|
1000 | 83f64091 | bellard | } |
1001 | 83f64091 | bellard | |
1002 | 83f64091 | bellard | /**
|
1003 | 83f64091 | bellard | * Length of a file in bytes. Return < 0 if error or unknown.
|
1004 | 83f64091 | bellard | */
|
1005 | 83f64091 | bellard | int64_t bdrv_getlength(BlockDriverState *bs) |
1006 | 83f64091 | bellard | { |
1007 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1008 | 83f64091 | bellard | if (!drv)
|
1009 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1010 | 51762288 | Stefan Hajnoczi | |
1011 | 51762288 | Stefan Hajnoczi | /* Fixed size devices use the total_sectors value for speed instead of
|
1012 | 51762288 | Stefan Hajnoczi | issuing a length query (like lseek) on each call. Also, legacy block
|
1013 | 51762288 | Stefan Hajnoczi | drivers don't provide a bdrv_getlength function and must use
|
1014 | 51762288 | Stefan Hajnoczi | total_sectors. */
|
1015 | 51762288 | Stefan Hajnoczi | if (!bs->growable || !drv->bdrv_getlength) {
|
1016 | 6ea44308 | Jan Kiszka | return bs->total_sectors * BDRV_SECTOR_SIZE;
|
1017 | 83f64091 | bellard | } |
1018 | 83f64091 | bellard | return drv->bdrv_getlength(bs);
|
1019 | fc01f7e7 | bellard | } |
1020 | fc01f7e7 | bellard | |
1021 | 19cb3738 | bellard | /* return 0 as number of sectors if no device present or error */
|
1022 | 96b8f136 | ths | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
|
1023 | fc01f7e7 | bellard | { |
1024 | 19cb3738 | bellard | int64_t length; |
1025 | 19cb3738 | bellard | length = bdrv_getlength(bs); |
1026 | 19cb3738 | bellard | if (length < 0) |
1027 | 19cb3738 | bellard | length = 0;
|
1028 | 19cb3738 | bellard | else
|
1029 | 6ea44308 | Jan Kiszka | length = length >> BDRV_SECTOR_BITS; |
1030 | 19cb3738 | bellard | *nb_sectors_ptr = length; |
1031 | fc01f7e7 | bellard | } |
1032 | cf98951b | bellard | |
1033 | f3d54fc4 | aliguori | struct partition {
|
1034 | f3d54fc4 | aliguori | uint8_t boot_ind; /* 0x80 - active */
|
1035 | f3d54fc4 | aliguori | uint8_t head; /* starting head */
|
1036 | f3d54fc4 | aliguori | uint8_t sector; /* starting sector */
|
1037 | f3d54fc4 | aliguori | uint8_t cyl; /* starting cylinder */
|
1038 | f3d54fc4 | aliguori | uint8_t sys_ind; /* What partition type */
|
1039 | f3d54fc4 | aliguori | uint8_t end_head; /* end head */
|
1040 | f3d54fc4 | aliguori | uint8_t end_sector; /* end sector */
|
1041 | f3d54fc4 | aliguori | uint8_t end_cyl; /* end cylinder */
|
1042 | f3d54fc4 | aliguori | uint32_t start_sect; /* starting sector counting from 0 */
|
1043 | f3d54fc4 | aliguori | uint32_t nr_sects; /* nr of sectors in partition */
|
1044 | f3d54fc4 | aliguori | } __attribute__((packed)); |
1045 | f3d54fc4 | aliguori | |
1046 | f3d54fc4 | aliguori | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */
|
1047 | f3d54fc4 | aliguori | static int guess_disk_lchs(BlockDriverState *bs, |
1048 | f3d54fc4 | aliguori | int *pcylinders, int *pheads, int *psectors) |
1049 | f3d54fc4 | aliguori | { |
1050 | f3d54fc4 | aliguori | uint8_t buf[512];
|
1051 | f3d54fc4 | aliguori | int ret, i, heads, sectors, cylinders;
|
1052 | f3d54fc4 | aliguori | struct partition *p;
|
1053 | f3d54fc4 | aliguori | uint32_t nr_sects; |
1054 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
1055 | f3d54fc4 | aliguori | |
1056 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
1057 | f3d54fc4 | aliguori | |
1058 | f3d54fc4 | aliguori | ret = bdrv_read(bs, 0, buf, 1); |
1059 | f3d54fc4 | aliguori | if (ret < 0) |
1060 | f3d54fc4 | aliguori | return -1; |
1061 | f3d54fc4 | aliguori | /* test msdos magic */
|
1062 | f3d54fc4 | aliguori | if (buf[510] != 0x55 || buf[511] != 0xaa) |
1063 | f3d54fc4 | aliguori | return -1; |
1064 | f3d54fc4 | aliguori | for(i = 0; i < 4; i++) { |
1065 | f3d54fc4 | aliguori | p = ((struct partition *)(buf + 0x1be)) + i; |
1066 | f3d54fc4 | aliguori | nr_sects = le32_to_cpu(p->nr_sects); |
1067 | f3d54fc4 | aliguori | if (nr_sects && p->end_head) {
|
1068 | f3d54fc4 | aliguori | /* We make the assumption that the partition terminates on
|
1069 | f3d54fc4 | aliguori | a cylinder boundary */
|
1070 | f3d54fc4 | aliguori | heads = p->end_head + 1;
|
1071 | f3d54fc4 | aliguori | sectors = p->end_sector & 63;
|
1072 | f3d54fc4 | aliguori | if (sectors == 0) |
1073 | f3d54fc4 | aliguori | continue;
|
1074 | f3d54fc4 | aliguori | cylinders = nb_sectors / (heads * sectors); |
1075 | f3d54fc4 | aliguori | if (cylinders < 1 || cylinders > 16383) |
1076 | f3d54fc4 | aliguori | continue;
|
1077 | f3d54fc4 | aliguori | *pheads = heads; |
1078 | f3d54fc4 | aliguori | *psectors = sectors; |
1079 | f3d54fc4 | aliguori | *pcylinders = cylinders; |
1080 | f3d54fc4 | aliguori | #if 0
|
1081 | f3d54fc4 | aliguori | printf("guessed geometry: LCHS=%d %d %d\n",
|
1082 | f3d54fc4 | aliguori | cylinders, heads, sectors);
|
1083 | f3d54fc4 | aliguori | #endif
|
1084 | f3d54fc4 | aliguori | return 0; |
1085 | f3d54fc4 | aliguori | } |
1086 | f3d54fc4 | aliguori | } |
1087 | f3d54fc4 | aliguori | return -1; |
1088 | f3d54fc4 | aliguori | } |
1089 | f3d54fc4 | aliguori | |
1090 | f3d54fc4 | aliguori | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) |
1091 | f3d54fc4 | aliguori | { |
1092 | f3d54fc4 | aliguori | int translation, lba_detected = 0; |
1093 | f3d54fc4 | aliguori | int cylinders, heads, secs;
|
1094 | a38131b6 | blueswir1 | uint64_t nb_sectors; |
1095 | f3d54fc4 | aliguori | |
1096 | f3d54fc4 | aliguori | /* if a geometry hint is available, use it */
|
1097 | f3d54fc4 | aliguori | bdrv_get_geometry(bs, &nb_sectors); |
1098 | f3d54fc4 | aliguori | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); |
1099 | f3d54fc4 | aliguori | translation = bdrv_get_translation_hint(bs); |
1100 | f3d54fc4 | aliguori | if (cylinders != 0) { |
1101 | f3d54fc4 | aliguori | *pcyls = cylinders; |
1102 | f3d54fc4 | aliguori | *pheads = heads; |
1103 | f3d54fc4 | aliguori | *psecs = secs; |
1104 | f3d54fc4 | aliguori | } else {
|
1105 | f3d54fc4 | aliguori | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { |
1106 | f3d54fc4 | aliguori | if (heads > 16) { |
1107 | f3d54fc4 | aliguori | /* if heads > 16, it means that a BIOS LBA
|
1108 | f3d54fc4 | aliguori | translation was active, so the default
|
1109 | f3d54fc4 | aliguori | hardware geometry is OK */
|
1110 | f3d54fc4 | aliguori | lba_detected = 1;
|
1111 | f3d54fc4 | aliguori | goto default_geometry;
|
1112 | f3d54fc4 | aliguori | } else {
|
1113 | f3d54fc4 | aliguori | *pcyls = cylinders; |
1114 | f3d54fc4 | aliguori | *pheads = heads; |
1115 | f3d54fc4 | aliguori | *psecs = secs; |
1116 | f3d54fc4 | aliguori | /* disable any translation to be in sync with
|
1117 | f3d54fc4 | aliguori | the logical geometry */
|
1118 | f3d54fc4 | aliguori | if (translation == BIOS_ATA_TRANSLATION_AUTO) {
|
1119 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
1120 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_NONE); |
1121 | f3d54fc4 | aliguori | } |
1122 | f3d54fc4 | aliguori | } |
1123 | f3d54fc4 | aliguori | } else {
|
1124 | f3d54fc4 | aliguori | default_geometry:
|
1125 | f3d54fc4 | aliguori | /* if no geometry, use a standard physical disk geometry */
|
1126 | f3d54fc4 | aliguori | cylinders = nb_sectors / (16 * 63); |
1127 | f3d54fc4 | aliguori | |
1128 | f3d54fc4 | aliguori | if (cylinders > 16383) |
1129 | f3d54fc4 | aliguori | cylinders = 16383;
|
1130 | f3d54fc4 | aliguori | else if (cylinders < 2) |
1131 | f3d54fc4 | aliguori | cylinders = 2;
|
1132 | f3d54fc4 | aliguori | *pcyls = cylinders; |
1133 | f3d54fc4 | aliguori | *pheads = 16;
|
1134 | f3d54fc4 | aliguori | *psecs = 63;
|
1135 | f3d54fc4 | aliguori | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { |
1136 | f3d54fc4 | aliguori | if ((*pcyls * *pheads) <= 131072) { |
1137 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
1138 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LARGE); |
1139 | f3d54fc4 | aliguori | } else {
|
1140 | f3d54fc4 | aliguori | bdrv_set_translation_hint(bs, |
1141 | f3d54fc4 | aliguori | BIOS_ATA_TRANSLATION_LBA); |
1142 | f3d54fc4 | aliguori | } |
1143 | f3d54fc4 | aliguori | } |
1144 | f3d54fc4 | aliguori | } |
1145 | f3d54fc4 | aliguori | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); |
1146 | f3d54fc4 | aliguori | } |
1147 | f3d54fc4 | aliguori | } |
1148 | f3d54fc4 | aliguori | |
1149 | 5fafdf24 | ths | void bdrv_set_geometry_hint(BlockDriverState *bs,
|
1150 | b338082b | bellard | int cyls, int heads, int secs) |
1151 | b338082b | bellard | { |
1152 | b338082b | bellard | bs->cyls = cyls; |
1153 | b338082b | bellard | bs->heads = heads; |
1154 | b338082b | bellard | bs->secs = secs; |
1155 | b338082b | bellard | } |
1156 | b338082b | bellard | |
1157 | b338082b | bellard | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
1158 | b338082b | bellard | { |
1159 | b338082b | bellard | bs->type = type; |
1160 | b338082b | bellard | bs->removable = ((type == BDRV_TYPE_CDROM || |
1161 | b338082b | bellard | type == BDRV_TYPE_FLOPPY)); |
1162 | b338082b | bellard | } |
1163 | b338082b | bellard | |
1164 | 46d4767d | bellard | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
1165 | 46d4767d | bellard | { |
1166 | 46d4767d | bellard | bs->translation = translation; |
1167 | 46d4767d | bellard | } |
1168 | 46d4767d | bellard | |
1169 | 5fafdf24 | ths | void bdrv_get_geometry_hint(BlockDriverState *bs,
|
1170 | b338082b | bellard | int *pcyls, int *pheads, int *psecs) |
1171 | b338082b | bellard | { |
1172 | b338082b | bellard | *pcyls = bs->cyls; |
1173 | b338082b | bellard | *pheads = bs->heads; |
1174 | b338082b | bellard | *psecs = bs->secs; |
1175 | b338082b | bellard | } |
1176 | b338082b | bellard | |
1177 | b338082b | bellard | int bdrv_get_type_hint(BlockDriverState *bs)
|
1178 | b338082b | bellard | { |
1179 | b338082b | bellard | return bs->type;
|
1180 | b338082b | bellard | } |
1181 | b338082b | bellard | |
1182 | 46d4767d | bellard | int bdrv_get_translation_hint(BlockDriverState *bs)
|
1183 | 46d4767d | bellard | { |
1184 | 46d4767d | bellard | return bs->translation;
|
1185 | 46d4767d | bellard | } |
1186 | 46d4767d | bellard | |
1187 | b338082b | bellard | int bdrv_is_removable(BlockDriverState *bs)
|
1188 | b338082b | bellard | { |
1189 | b338082b | bellard | return bs->removable;
|
1190 | b338082b | bellard | } |
1191 | b338082b | bellard | |
1192 | b338082b | bellard | int bdrv_is_read_only(BlockDriverState *bs)
|
1193 | b338082b | bellard | { |
1194 | b338082b | bellard | return bs->read_only;
|
1195 | b338082b | bellard | } |
1196 | b338082b | bellard | |
1197 | 985a03b0 | ths | int bdrv_is_sg(BlockDriverState *bs)
|
1198 | 985a03b0 | ths | { |
1199 | 985a03b0 | ths | return bs->sg;
|
1200 | 985a03b0 | ths | } |
1201 | 985a03b0 | ths | |
1202 | e900a7b7 | Christoph Hellwig | int bdrv_enable_write_cache(BlockDriverState *bs)
|
1203 | e900a7b7 | Christoph Hellwig | { |
1204 | e900a7b7 | Christoph Hellwig | return bs->enable_write_cache;
|
1205 | e900a7b7 | Christoph Hellwig | } |
1206 | e900a7b7 | Christoph Hellwig | |
1207 | 19cb3738 | bellard | /* XXX: no longer used */
|
1208 | 5fafdf24 | ths | void bdrv_set_change_cb(BlockDriverState *bs,
|
1209 | b338082b | bellard | void (*change_cb)(void *opaque), void *opaque) |
1210 | b338082b | bellard | { |
1211 | b338082b | bellard | bs->change_cb = change_cb; |
1212 | b338082b | bellard | bs->change_opaque = opaque; |
1213 | b338082b | bellard | } |
1214 | b338082b | bellard | |
1215 | ea2384d3 | bellard | int bdrv_is_encrypted(BlockDriverState *bs)
|
1216 | ea2384d3 | bellard | { |
1217 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted)
|
1218 | ea2384d3 | bellard | return 1; |
1219 | ea2384d3 | bellard | return bs->encrypted;
|
1220 | ea2384d3 | bellard | } |
1221 | ea2384d3 | bellard | |
1222 | c0f4ce77 | aliguori | int bdrv_key_required(BlockDriverState *bs)
|
1223 | c0f4ce77 | aliguori | { |
1224 | c0f4ce77 | aliguori | BlockDriverState *backing_hd = bs->backing_hd; |
1225 | c0f4ce77 | aliguori | |
1226 | c0f4ce77 | aliguori | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key)
|
1227 | c0f4ce77 | aliguori | return 1; |
1228 | c0f4ce77 | aliguori | return (bs->encrypted && !bs->valid_key);
|
1229 | c0f4ce77 | aliguori | } |
1230 | c0f4ce77 | aliguori | |
1231 | ea2384d3 | bellard | int bdrv_set_key(BlockDriverState *bs, const char *key) |
1232 | ea2384d3 | bellard | { |
1233 | ea2384d3 | bellard | int ret;
|
1234 | ea2384d3 | bellard | if (bs->backing_hd && bs->backing_hd->encrypted) {
|
1235 | ea2384d3 | bellard | ret = bdrv_set_key(bs->backing_hd, key); |
1236 | ea2384d3 | bellard | if (ret < 0) |
1237 | ea2384d3 | bellard | return ret;
|
1238 | ea2384d3 | bellard | if (!bs->encrypted)
|
1239 | ea2384d3 | bellard | return 0; |
1240 | ea2384d3 | bellard | } |
1241 | fd04a2ae | Shahar Havivi | if (!bs->encrypted) {
|
1242 | fd04a2ae | Shahar Havivi | return -EINVAL;
|
1243 | fd04a2ae | Shahar Havivi | } else if (!bs->drv || !bs->drv->bdrv_set_key) { |
1244 | fd04a2ae | Shahar Havivi | return -ENOMEDIUM;
|
1245 | fd04a2ae | Shahar Havivi | } |
1246 | c0f4ce77 | aliguori | ret = bs->drv->bdrv_set_key(bs, key); |
1247 | bb5fc20f | aliguori | if (ret < 0) { |
1248 | bb5fc20f | aliguori | bs->valid_key = 0;
|
1249 | bb5fc20f | aliguori | } else if (!bs->valid_key) { |
1250 | bb5fc20f | aliguori | bs->valid_key = 1;
|
1251 | bb5fc20f | aliguori | /* call the change callback now, we skipped it on open */
|
1252 | bb5fc20f | aliguori | bs->media_changed = 1;
|
1253 | bb5fc20f | aliguori | if (bs->change_cb)
|
1254 | bb5fc20f | aliguori | bs->change_cb(bs->change_opaque); |
1255 | bb5fc20f | aliguori | } |
1256 | c0f4ce77 | aliguori | return ret;
|
1257 | ea2384d3 | bellard | } |
1258 | ea2384d3 | bellard | |
1259 | ea2384d3 | bellard | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
1260 | ea2384d3 | bellard | { |
1261 | 19cb3738 | bellard | if (!bs->drv) {
|
1262 | ea2384d3 | bellard | buf[0] = '\0'; |
1263 | ea2384d3 | bellard | } else {
|
1264 | ea2384d3 | bellard | pstrcpy(buf, buf_size, bs->drv->format_name); |
1265 | ea2384d3 | bellard | } |
1266 | ea2384d3 | bellard | } |
1267 | ea2384d3 | bellard | |
1268 | 5fafdf24 | ths | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
1269 | ea2384d3 | bellard | void *opaque)
|
1270 | ea2384d3 | bellard | { |
1271 | ea2384d3 | bellard | BlockDriver *drv; |
1272 | ea2384d3 | bellard | |
1273 | 8a22f02a | Stefan Hajnoczi | QLIST_FOREACH(drv, &bdrv_drivers, list) { |
1274 | ea2384d3 | bellard | it(opaque, drv->format_name); |
1275 | ea2384d3 | bellard | } |
1276 | ea2384d3 | bellard | } |
1277 | ea2384d3 | bellard | |
1278 | b338082b | bellard | BlockDriverState *bdrv_find(const char *name) |
1279 | b338082b | bellard | { |
1280 | b338082b | bellard | BlockDriverState *bs; |
1281 | b338082b | bellard | |
1282 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
1283 | 1b7bdbc1 | Stefan Hajnoczi | if (!strcmp(name, bs->device_name)) {
|
1284 | b338082b | bellard | return bs;
|
1285 | 1b7bdbc1 | Stefan Hajnoczi | } |
1286 | b338082b | bellard | } |
1287 | b338082b | bellard | return NULL; |
1288 | b338082b | bellard | } |
1289 | b338082b | bellard | |
1290 | 51de9760 | aliguori | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
1291 | 81d0912d | bellard | { |
1292 | 81d0912d | bellard | BlockDriverState *bs; |
1293 | 81d0912d | bellard | |
1294 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
1295 | 51de9760 | aliguori | it(opaque, bs); |
1296 | 81d0912d | bellard | } |
1297 | 81d0912d | bellard | } |
1298 | 81d0912d | bellard | |
1299 | ea2384d3 | bellard | const char *bdrv_get_device_name(BlockDriverState *bs) |
1300 | ea2384d3 | bellard | { |
1301 | ea2384d3 | bellard | return bs->device_name;
|
1302 | ea2384d3 | bellard | } |
1303 | ea2384d3 | bellard | |
1304 | 7a6cba61 | pbrook | void bdrv_flush(BlockDriverState *bs)
|
1305 | 7a6cba61 | pbrook | { |
1306 | 3f5075ae | Christoph Hellwig | if (bs->drv && bs->drv->bdrv_flush)
|
1307 | 7a6cba61 | pbrook | bs->drv->bdrv_flush(bs); |
1308 | 7a6cba61 | pbrook | } |
1309 | 7a6cba61 | pbrook | |
1310 | c6ca28d6 | aliguori | void bdrv_flush_all(void) |
1311 | c6ca28d6 | aliguori | { |
1312 | c6ca28d6 | aliguori | BlockDriverState *bs; |
1313 | c6ca28d6 | aliguori | |
1314 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
1315 | 1b7bdbc1 | Stefan Hajnoczi | if (bs->drv && !bdrv_is_read_only(bs) &&
|
1316 | 1b7bdbc1 | Stefan Hajnoczi | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) { |
1317 | c6ca28d6 | aliguori | bdrv_flush(bs); |
1318 | 1b7bdbc1 | Stefan Hajnoczi | } |
1319 | 1b7bdbc1 | Stefan Hajnoczi | } |
1320 | c6ca28d6 | aliguori | } |
1321 | c6ca28d6 | aliguori | |
1322 | f2feebbd | Kevin Wolf | int bdrv_has_zero_init(BlockDriverState *bs)
|
1323 | f2feebbd | Kevin Wolf | { |
1324 | f2feebbd | Kevin Wolf | assert(bs->drv); |
1325 | f2feebbd | Kevin Wolf | |
1326 | f2feebbd | Kevin Wolf | if (bs->drv->no_zero_init) {
|
1327 | f2feebbd | Kevin Wolf | return 0; |
1328 | f2feebbd | Kevin Wolf | } else if (bs->file) { |
1329 | f2feebbd | Kevin Wolf | return bdrv_has_zero_init(bs->file);
|
1330 | f2feebbd | Kevin Wolf | } |
1331 | f2feebbd | Kevin Wolf | |
1332 | f2feebbd | Kevin Wolf | return 1; |
1333 | f2feebbd | Kevin Wolf | } |
1334 | f2feebbd | Kevin Wolf | |
1335 | f58c7b35 | ths | /*
|
1336 | f58c7b35 | ths | * Returns true iff the specified sector is present in the disk image. Drivers
|
1337 | f58c7b35 | ths | * not implementing the functionality are assumed to not support backing files,
|
1338 | f58c7b35 | ths | * hence all their sectors are reported as allocated.
|
1339 | f58c7b35 | ths | *
|
1340 | f58c7b35 | ths | * 'pnum' is set to the number of sectors (including and immediately following
|
1341 | f58c7b35 | ths | * the specified sector) that are known to be in the same
|
1342 | f58c7b35 | ths | * allocated/unallocated state.
|
1343 | f58c7b35 | ths | *
|
1344 | f58c7b35 | ths | * 'nb_sectors' is the max value 'pnum' should be set to.
|
1345 | f58c7b35 | ths | */
|
1346 | f58c7b35 | ths | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
1347 | f58c7b35 | ths | int *pnum)
|
1348 | f58c7b35 | ths | { |
1349 | f58c7b35 | ths | int64_t n; |
1350 | f58c7b35 | ths | if (!bs->drv->bdrv_is_allocated) {
|
1351 | f58c7b35 | ths | if (sector_num >= bs->total_sectors) {
|
1352 | f58c7b35 | ths | *pnum = 0;
|
1353 | f58c7b35 | ths | return 0; |
1354 | f58c7b35 | ths | } |
1355 | f58c7b35 | ths | n = bs->total_sectors - sector_num; |
1356 | f58c7b35 | ths | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); |
1357 | f58c7b35 | ths | return 1; |
1358 | f58c7b35 | ths | } |
1359 | f58c7b35 | ths | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum);
|
1360 | f58c7b35 | ths | } |
1361 | f58c7b35 | ths | |
1362 | 2582bfed | Luiz Capitulino | void bdrv_mon_event(const BlockDriverState *bdrv, |
1363 | 2582bfed | Luiz Capitulino | BlockMonEventAction action, int is_read)
|
1364 | 2582bfed | Luiz Capitulino | { |
1365 | 2582bfed | Luiz Capitulino | QObject *data; |
1366 | 2582bfed | Luiz Capitulino | const char *action_str; |
1367 | 2582bfed | Luiz Capitulino | |
1368 | 2582bfed | Luiz Capitulino | switch (action) {
|
1369 | 2582bfed | Luiz Capitulino | case BDRV_ACTION_REPORT:
|
1370 | 2582bfed | Luiz Capitulino | action_str = "report";
|
1371 | 2582bfed | Luiz Capitulino | break;
|
1372 | 2582bfed | Luiz Capitulino | case BDRV_ACTION_IGNORE:
|
1373 | 2582bfed | Luiz Capitulino | action_str = "ignore";
|
1374 | 2582bfed | Luiz Capitulino | break;
|
1375 | 2582bfed | Luiz Capitulino | case BDRV_ACTION_STOP:
|
1376 | 2582bfed | Luiz Capitulino | action_str = "stop";
|
1377 | 2582bfed | Luiz Capitulino | break;
|
1378 | 2582bfed | Luiz Capitulino | default:
|
1379 | 2582bfed | Luiz Capitulino | abort(); |
1380 | 2582bfed | Luiz Capitulino | } |
1381 | 2582bfed | Luiz Capitulino | |
1382 | 2582bfed | Luiz Capitulino | data = qobject_from_jsonf("{ 'device': %s, 'action': %s, 'operation': %s }",
|
1383 | 2582bfed | Luiz Capitulino | bdrv->device_name, |
1384 | 2582bfed | Luiz Capitulino | action_str, |
1385 | 2582bfed | Luiz Capitulino | is_read ? "read" : "write"); |
1386 | 2582bfed | Luiz Capitulino | monitor_protocol_event(QEVENT_BLOCK_IO_ERROR, data); |
1387 | 2582bfed | Luiz Capitulino | |
1388 | 2582bfed | Luiz Capitulino | qobject_decref(data); |
1389 | 2582bfed | Luiz Capitulino | } |
1390 | 2582bfed | Luiz Capitulino | |
1391 | d15e5465 | Luiz Capitulino | static void bdrv_print_dict(QObject *obj, void *opaque) |
1392 | b338082b | bellard | { |
1393 | d15e5465 | Luiz Capitulino | QDict *bs_dict; |
1394 | d15e5465 | Luiz Capitulino | Monitor *mon = opaque; |
1395 | d15e5465 | Luiz Capitulino | |
1396 | d15e5465 | Luiz Capitulino | bs_dict = qobject_to_qdict(obj); |
1397 | d15e5465 | Luiz Capitulino | |
1398 | d15e5465 | Luiz Capitulino | monitor_printf(mon, "%s: type=%s removable=%d",
|
1399 | d15e5465 | Luiz Capitulino | qdict_get_str(bs_dict, "device"),
|
1400 | d15e5465 | Luiz Capitulino | qdict_get_str(bs_dict, "type"),
|
1401 | d15e5465 | Luiz Capitulino | qdict_get_bool(bs_dict, "removable"));
|
1402 | d15e5465 | Luiz Capitulino | |
1403 | d15e5465 | Luiz Capitulino | if (qdict_get_bool(bs_dict, "removable")) { |
1404 | d15e5465 | Luiz Capitulino | monitor_printf(mon, " locked=%d", qdict_get_bool(bs_dict, "locked")); |
1405 | d15e5465 | Luiz Capitulino | } |
1406 | d15e5465 | Luiz Capitulino | |
1407 | d15e5465 | Luiz Capitulino | if (qdict_haskey(bs_dict, "inserted")) { |
1408 | d15e5465 | Luiz Capitulino | QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted"));
|
1409 | d15e5465 | Luiz Capitulino | |
1410 | d15e5465 | Luiz Capitulino | monitor_printf(mon, " file=");
|
1411 | d15e5465 | Luiz Capitulino | monitor_print_filename(mon, qdict_get_str(qdict, "file"));
|
1412 | d15e5465 | Luiz Capitulino | if (qdict_haskey(qdict, "backing_file")) { |
1413 | d15e5465 | Luiz Capitulino | monitor_printf(mon, " backing_file=");
|
1414 | d15e5465 | Luiz Capitulino | monitor_print_filename(mon, qdict_get_str(qdict, "backing_file"));
|
1415 | d15e5465 | Luiz Capitulino | } |
1416 | d15e5465 | Luiz Capitulino | monitor_printf(mon, " ro=%d drv=%s encrypted=%d",
|
1417 | d15e5465 | Luiz Capitulino | qdict_get_bool(qdict, "ro"),
|
1418 | d15e5465 | Luiz Capitulino | qdict_get_str(qdict, "drv"),
|
1419 | d15e5465 | Luiz Capitulino | qdict_get_bool(qdict, "encrypted"));
|
1420 | d15e5465 | Luiz Capitulino | } else {
|
1421 | d15e5465 | Luiz Capitulino | monitor_printf(mon, " [not inserted]");
|
1422 | d15e5465 | Luiz Capitulino | } |
1423 | d15e5465 | Luiz Capitulino | |
1424 | d15e5465 | Luiz Capitulino | monitor_printf(mon, "\n");
|
1425 | d15e5465 | Luiz Capitulino | } |
1426 | d15e5465 | Luiz Capitulino | |
1427 | d15e5465 | Luiz Capitulino | void bdrv_info_print(Monitor *mon, const QObject *data) |
1428 | d15e5465 | Luiz Capitulino | { |
1429 | d15e5465 | Luiz Capitulino | qlist_iter(qobject_to_qlist(data), bdrv_print_dict, mon); |
1430 | d15e5465 | Luiz Capitulino | } |
1431 | d15e5465 | Luiz Capitulino | |
1432 | d15e5465 | Luiz Capitulino | /**
|
1433 | d15e5465 | Luiz Capitulino | * bdrv_info(): Block devices information
|
1434 | d15e5465 | Luiz Capitulino | *
|
1435 | d15e5465 | Luiz Capitulino | * Each block device information is stored in a QDict and the
|
1436 | d15e5465 | Luiz Capitulino | * returned QObject is a QList of all devices.
|
1437 | d15e5465 | Luiz Capitulino | *
|
1438 | d15e5465 | Luiz Capitulino | * The QDict contains the following:
|
1439 | d15e5465 | Luiz Capitulino | *
|
1440 | d15e5465 | Luiz Capitulino | * - "device": device name
|
1441 | d15e5465 | Luiz Capitulino | * - "type": device type
|
1442 | d15e5465 | Luiz Capitulino | * - "removable": true if the device is removable, false otherwise
|
1443 | d15e5465 | Luiz Capitulino | * - "locked": true if the device is locked, false otherwise
|
1444 | d15e5465 | Luiz Capitulino | * - "inserted": only present if the device is inserted, it is a QDict
|
1445 | d15e5465 | Luiz Capitulino | * containing the following:
|
1446 | d15e5465 | Luiz Capitulino | * - "file": device file name
|
1447 | d15e5465 | Luiz Capitulino | * - "ro": true if read-only, false otherwise
|
1448 | d15e5465 | Luiz Capitulino | * - "drv": driver format name
|
1449 | d15e5465 | Luiz Capitulino | * - "backing_file": backing file name if one is used
|
1450 | d15e5465 | Luiz Capitulino | * - "encrypted": true if encrypted, false otherwise
|
1451 | d15e5465 | Luiz Capitulino | *
|
1452 | d15e5465 | Luiz Capitulino | * Example:
|
1453 | d15e5465 | Luiz Capitulino | *
|
1454 | d15e5465 | Luiz Capitulino | * [ { "device": "ide0-hd0", "type": "hd", "removable": false, "locked": false,
|
1455 | d15e5465 | Luiz Capitulino | * "inserted": { "file": "/tmp/foobar", "ro": false, "drv": "qcow2" } },
|
1456 | d15e5465 | Luiz Capitulino | * { "device": "floppy0", "type": "floppy", "removable": true,
|
1457 | d15e5465 | Luiz Capitulino | * "locked": false } ]
|
1458 | d15e5465 | Luiz Capitulino | */
|
1459 | d15e5465 | Luiz Capitulino | void bdrv_info(Monitor *mon, QObject **ret_data)
|
1460 | d15e5465 | Luiz Capitulino | { |
1461 | d15e5465 | Luiz Capitulino | QList *bs_list; |
1462 | b338082b | bellard | BlockDriverState *bs; |
1463 | b338082b | bellard | |
1464 | d15e5465 | Luiz Capitulino | bs_list = qlist_new(); |
1465 | d15e5465 | Luiz Capitulino | |
1466 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
1467 | d15e5465 | Luiz Capitulino | QObject *bs_obj; |
1468 | d15e5465 | Luiz Capitulino | const char *type = "unknown"; |
1469 | d15e5465 | Luiz Capitulino | |
1470 | b338082b | bellard | switch(bs->type) {
|
1471 | b338082b | bellard | case BDRV_TYPE_HD:
|
1472 | d15e5465 | Luiz Capitulino | type = "hd";
|
1473 | b338082b | bellard | break;
|
1474 | b338082b | bellard | case BDRV_TYPE_CDROM:
|
1475 | d15e5465 | Luiz Capitulino | type = "cdrom";
|
1476 | b338082b | bellard | break;
|
1477 | b338082b | bellard | case BDRV_TYPE_FLOPPY:
|
1478 | d15e5465 | Luiz Capitulino | type = "floppy";
|
1479 | b338082b | bellard | break;
|
1480 | b338082b | bellard | } |
1481 | d15e5465 | Luiz Capitulino | |
1482 | d15e5465 | Luiz Capitulino | bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': %s, "
|
1483 | d15e5465 | Luiz Capitulino | "'removable': %i, 'locked': %i }",
|
1484 | d15e5465 | Luiz Capitulino | bs->device_name, type, bs->removable, |
1485 | d15e5465 | Luiz Capitulino | bs->locked); |
1486 | d15e5465 | Luiz Capitulino | |
1487 | 19cb3738 | bellard | if (bs->drv) {
|
1488 | d15e5465 | Luiz Capitulino | QObject *obj; |
1489 | d15e5465 | Luiz Capitulino | QDict *bs_dict = qobject_to_qdict(bs_obj); |
1490 | d15e5465 | Luiz Capitulino | |
1491 | d15e5465 | Luiz Capitulino | obj = qobject_from_jsonf("{ 'file': %s, 'ro': %i, 'drv': %s, "
|
1492 | d15e5465 | Luiz Capitulino | "'encrypted': %i }",
|
1493 | d15e5465 | Luiz Capitulino | bs->filename, bs->read_only, |
1494 | d15e5465 | Luiz Capitulino | bs->drv->format_name, |
1495 | d15e5465 | Luiz Capitulino | bdrv_is_encrypted(bs)); |
1496 | fef30743 | ths | if (bs->backing_file[0] != '\0') { |
1497 | d15e5465 | Luiz Capitulino | QDict *qdict = qobject_to_qdict(obj); |
1498 | d15e5465 | Luiz Capitulino | qdict_put(qdict, "backing_file",
|
1499 | d15e5465 | Luiz Capitulino | qstring_from_str(bs->backing_file)); |
1500 | 376253ec | aliguori | } |
1501 | d15e5465 | Luiz Capitulino | |
1502 | d15e5465 | Luiz Capitulino | qdict_put_obj(bs_dict, "inserted", obj);
|
1503 | b338082b | bellard | } |
1504 | d15e5465 | Luiz Capitulino | qlist_append_obj(bs_list, bs_obj); |
1505 | b338082b | bellard | } |
1506 | d15e5465 | Luiz Capitulino | |
1507 | d15e5465 | Luiz Capitulino | *ret_data = QOBJECT(bs_list); |
1508 | b338082b | bellard | } |
1509 | a36e69dd | ths | |
1510 | 218a536a | Luiz Capitulino | static void bdrv_stats_iter(QObject *data, void *opaque) |
1511 | a36e69dd | ths | { |
1512 | 218a536a | Luiz Capitulino | QDict *qdict; |
1513 | 218a536a | Luiz Capitulino | Monitor *mon = opaque; |
1514 | 218a536a | Luiz Capitulino | |
1515 | 218a536a | Luiz Capitulino | qdict = qobject_to_qdict(data); |
1516 | 218a536a | Luiz Capitulino | monitor_printf(mon, "%s:", qdict_get_str(qdict, "device")); |
1517 | 218a536a | Luiz Capitulino | |
1518 | 218a536a | Luiz Capitulino | qdict = qobject_to_qdict(qdict_get(qdict, "stats"));
|
1519 | 218a536a | Luiz Capitulino | monitor_printf(mon, " rd_bytes=%" PRId64
|
1520 | 218a536a | Luiz Capitulino | " wr_bytes=%" PRId64
|
1521 | 218a536a | Luiz Capitulino | " rd_operations=%" PRId64
|
1522 | 218a536a | Luiz Capitulino | " wr_operations=%" PRId64
|
1523 | 218a536a | Luiz Capitulino | "\n",
|
1524 | 218a536a | Luiz Capitulino | qdict_get_int(qdict, "rd_bytes"),
|
1525 | 218a536a | Luiz Capitulino | qdict_get_int(qdict, "wr_bytes"),
|
1526 | 218a536a | Luiz Capitulino | qdict_get_int(qdict, "rd_operations"),
|
1527 | 218a536a | Luiz Capitulino | qdict_get_int(qdict, "wr_operations"));
|
1528 | 218a536a | Luiz Capitulino | } |
1529 | 218a536a | Luiz Capitulino | |
1530 | 218a536a | Luiz Capitulino | void bdrv_stats_print(Monitor *mon, const QObject *data) |
1531 | 218a536a | Luiz Capitulino | { |
1532 | 218a536a | Luiz Capitulino | qlist_iter(qobject_to_qlist(data), bdrv_stats_iter, mon); |
1533 | 218a536a | Luiz Capitulino | } |
1534 | 218a536a | Luiz Capitulino | |
1535 | 294cc35f | Kevin Wolf | static QObject* bdrv_info_stats_bs(BlockDriverState *bs)
|
1536 | 294cc35f | Kevin Wolf | { |
1537 | 294cc35f | Kevin Wolf | QObject *res; |
1538 | 294cc35f | Kevin Wolf | QDict *dict; |
1539 | 294cc35f | Kevin Wolf | |
1540 | 294cc35f | Kevin Wolf | res = qobject_from_jsonf("{ 'stats': {"
|
1541 | 294cc35f | Kevin Wolf | "'rd_bytes': %" PRId64 "," |
1542 | 294cc35f | Kevin Wolf | "'wr_bytes': %" PRId64 "," |
1543 | 294cc35f | Kevin Wolf | "'rd_operations': %" PRId64 "," |
1544 | 294cc35f | Kevin Wolf | "'wr_operations': %" PRId64 "," |
1545 | 294cc35f | Kevin Wolf | "'wr_highest_offset': %" PRId64
|
1546 | 294cc35f | Kevin Wolf | "} }",
|
1547 | 294cc35f | Kevin Wolf | bs->rd_bytes, bs->wr_bytes, |
1548 | 294cc35f | Kevin Wolf | bs->rd_ops, bs->wr_ops, |
1549 | 294cc35f | Kevin Wolf | bs->wr_highest_sector * 512);
|
1550 | 294cc35f | Kevin Wolf | dict = qobject_to_qdict(res); |
1551 | 294cc35f | Kevin Wolf | |
1552 | 294cc35f | Kevin Wolf | if (*bs->device_name) {
|
1553 | 294cc35f | Kevin Wolf | qdict_put(dict, "device", qstring_from_str(bs->device_name));
|
1554 | 294cc35f | Kevin Wolf | } |
1555 | 294cc35f | Kevin Wolf | |
1556 | 294cc35f | Kevin Wolf | if (bs->file) {
|
1557 | 294cc35f | Kevin Wolf | QObject *parent = bdrv_info_stats_bs(bs->file); |
1558 | 294cc35f | Kevin Wolf | qdict_put_obj(dict, "parent", parent);
|
1559 | 294cc35f | Kevin Wolf | } |
1560 | 294cc35f | Kevin Wolf | |
1561 | 294cc35f | Kevin Wolf | return res;
|
1562 | 294cc35f | Kevin Wolf | } |
1563 | 294cc35f | Kevin Wolf | |
1564 | 218a536a | Luiz Capitulino | /**
|
1565 | 218a536a | Luiz Capitulino | * bdrv_info_stats(): show block device statistics
|
1566 | 218a536a | Luiz Capitulino | *
|
1567 | 218a536a | Luiz Capitulino | * Each device statistic information is stored in a QDict and
|
1568 | 218a536a | Luiz Capitulino | * the returned QObject is a QList of all devices.
|
1569 | 218a536a | Luiz Capitulino | *
|
1570 | 218a536a | Luiz Capitulino | * The QDict contains the following:
|
1571 | 218a536a | Luiz Capitulino | *
|
1572 | 218a536a | Luiz Capitulino | * - "device": device name
|
1573 | 218a536a | Luiz Capitulino | * - "stats": A QDict with the statistics information, it contains:
|
1574 | 218a536a | Luiz Capitulino | * - "rd_bytes": bytes read
|
1575 | 218a536a | Luiz Capitulino | * - "wr_bytes": bytes written
|
1576 | 218a536a | Luiz Capitulino | * - "rd_operations": read operations
|
1577 | 218a536a | Luiz Capitulino | * - "wr_operations": write operations
|
1578 | 294cc35f | Kevin Wolf | * - "wr_highest_offset": Highest offset of a sector written since the
|
1579 | 294cc35f | Kevin Wolf | * BlockDriverState has been opened
|
1580 | 21955137 | Daniel P. Berrange | * - "parent": A QDict recursively holding the statistics of the underlying
|
1581 | 21955137 | Daniel P. Berrange | * protocol (e.g. the host file for a qcow2 image). If there is no
|
1582 | 21955137 | Daniel P. Berrange | * underlying protocol, this field is omitted.
|
1583 | 294cc35f | Kevin Wolf | *
|
1584 | 218a536a | Luiz Capitulino | * Example:
|
1585 | 218a536a | Luiz Capitulino | *
|
1586 | 218a536a | Luiz Capitulino | * [ { "device": "ide0-hd0",
|
1587 | 218a536a | Luiz Capitulino | * "stats": { "rd_bytes": 512,
|
1588 | 218a536a | Luiz Capitulino | * "wr_bytes": 0,
|
1589 | 218a536a | Luiz Capitulino | * "rd_operations": 1,
|
1590 | 294cc35f | Kevin Wolf | * "wr_operations": 0,
|
1591 | 21955137 | Daniel P. Berrange | * "wr_highest_offset": 0 },
|
1592 | 21955137 | Daniel P. Berrange | * "parent": {
|
1593 | 21955137 | Daniel P. Berrange | * "stats": { "rd_bytes": 1024,
|
1594 | 21955137 | Daniel P. Berrange | * "wr_bytes": 0,
|
1595 | 21955137 | Daniel P. Berrange | * "rd_operations": 2,
|
1596 | 21955137 | Daniel P. Berrange | * "wr_operations": 0,
|
1597 | 21955137 | Daniel P. Berrange | * "wr_highest_offset": 0,
|
1598 | 21955137 | Daniel P. Berrange | * } } },
|
1599 | 218a536a | Luiz Capitulino | * { "device": "ide1-cd0",
|
1600 | 218a536a | Luiz Capitulino | * "stats": { "rd_bytes": 0,
|
1601 | 218a536a | Luiz Capitulino | * "wr_bytes": 0,
|
1602 | 218a536a | Luiz Capitulino | * "rd_operations": 0,
|
1603 | 294cc35f | Kevin Wolf | * "wr_operations": 0,
|
1604 | 294cc35f | Kevin Wolf | * "wr_highest_offset": 0 } },
|
1605 | 218a536a | Luiz Capitulino | */
|
1606 | 218a536a | Luiz Capitulino | void bdrv_info_stats(Monitor *mon, QObject **ret_data)
|
1607 | 218a536a | Luiz Capitulino | { |
1608 | 218a536a | Luiz Capitulino | QObject *obj; |
1609 | 218a536a | Luiz Capitulino | QList *devices; |
1610 | a36e69dd | ths | BlockDriverState *bs; |
1611 | a36e69dd | ths | |
1612 | 218a536a | Luiz Capitulino | devices = qlist_new(); |
1613 | 218a536a | Luiz Capitulino | |
1614 | 1b7bdbc1 | Stefan Hajnoczi | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
1615 | 294cc35f | Kevin Wolf | obj = bdrv_info_stats_bs(bs); |
1616 | 218a536a | Luiz Capitulino | qlist_append_obj(devices, obj); |
1617 | a36e69dd | ths | } |
1618 | 218a536a | Luiz Capitulino | |
1619 | 218a536a | Luiz Capitulino | *ret_data = QOBJECT(devices); |
1620 | a36e69dd | ths | } |
1621 | ea2384d3 | bellard | |
1622 | 045df330 | aliguori | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
1623 | 045df330 | aliguori | { |
1624 | 045df330 | aliguori | if (bs->backing_hd && bs->backing_hd->encrypted)
|
1625 | 045df330 | aliguori | return bs->backing_file;
|
1626 | 045df330 | aliguori | else if (bs->encrypted) |
1627 | 045df330 | aliguori | return bs->filename;
|
1628 | 045df330 | aliguori | else
|
1629 | 045df330 | aliguori | return NULL; |
1630 | 045df330 | aliguori | } |
1631 | 045df330 | aliguori | |
1632 | 5fafdf24 | ths | void bdrv_get_backing_filename(BlockDriverState *bs,
|
1633 | 83f64091 | bellard | char *filename, int filename_size) |
1634 | 83f64091 | bellard | { |
1635 | b783e409 | Kevin Wolf | if (!bs->backing_file) {
|
1636 | 83f64091 | bellard | pstrcpy(filename, filename_size, "");
|
1637 | 83f64091 | bellard | } else {
|
1638 | 83f64091 | bellard | pstrcpy(filename, filename_size, bs->backing_file); |
1639 | 83f64091 | bellard | } |
1640 | 83f64091 | bellard | } |
1641 | 83f64091 | bellard | |
1642 | 5fafdf24 | ths | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
|
1643 | faea38e7 | bellard | const uint8_t *buf, int nb_sectors) |
1644 | faea38e7 | bellard | { |
1645 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1646 | faea38e7 | bellard | if (!drv)
|
1647 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1648 | faea38e7 | bellard | if (!drv->bdrv_write_compressed)
|
1649 | faea38e7 | bellard | return -ENOTSUP;
|
1650 | fbb7b4e0 | Kevin Wolf | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1651 | fbb7b4e0 | Kevin Wolf | return -EIO;
|
1652 | a55eb92c | Jan Kiszka | |
1653 | c6d22830 | Jan Kiszka | if (bs->dirty_bitmap) {
|
1654 | 7cd1e32a | lirans@il.ibm.com | set_dirty_bitmap(bs, sector_num, nb_sectors, 1);
|
1655 | 7cd1e32a | lirans@il.ibm.com | } |
1656 | a55eb92c | Jan Kiszka | |
1657 | faea38e7 | bellard | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
|
1658 | faea38e7 | bellard | } |
1659 | 3b46e624 | ths | |
1660 | faea38e7 | bellard | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
|
1661 | faea38e7 | bellard | { |
1662 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1663 | faea38e7 | bellard | if (!drv)
|
1664 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1665 | faea38e7 | bellard | if (!drv->bdrv_get_info)
|
1666 | faea38e7 | bellard | return -ENOTSUP;
|
1667 | faea38e7 | bellard | memset(bdi, 0, sizeof(*bdi)); |
1668 | faea38e7 | bellard | return drv->bdrv_get_info(bs, bdi);
|
1669 | faea38e7 | bellard | } |
1670 | faea38e7 | bellard | |
1671 | 45566e9c | Christoph Hellwig | int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
1672 | 45566e9c | Christoph Hellwig | int64_t pos, int size)
|
1673 | 178e08a5 | aliguori | { |
1674 | 178e08a5 | aliguori | BlockDriver *drv = bs->drv; |
1675 | 178e08a5 | aliguori | if (!drv)
|
1676 | 178e08a5 | aliguori | return -ENOMEDIUM;
|
1677 | 45566e9c | Christoph Hellwig | if (!drv->bdrv_save_vmstate)
|
1678 | 178e08a5 | aliguori | return -ENOTSUP;
|
1679 | 45566e9c | Christoph Hellwig | return drv->bdrv_save_vmstate(bs, buf, pos, size);
|
1680 | 178e08a5 | aliguori | } |
1681 | 178e08a5 | aliguori | |
1682 | 45566e9c | Christoph Hellwig | int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf,
|
1683 | 45566e9c | Christoph Hellwig | int64_t pos, int size)
|
1684 | 178e08a5 | aliguori | { |
1685 | 178e08a5 | aliguori | BlockDriver *drv = bs->drv; |
1686 | 178e08a5 | aliguori | if (!drv)
|
1687 | 178e08a5 | aliguori | return -ENOMEDIUM;
|
1688 | 45566e9c | Christoph Hellwig | if (!drv->bdrv_load_vmstate)
|
1689 | 178e08a5 | aliguori | return -ENOTSUP;
|
1690 | 45566e9c | Christoph Hellwig | return drv->bdrv_load_vmstate(bs, buf, pos, size);
|
1691 | 178e08a5 | aliguori | } |
1692 | 178e08a5 | aliguori | |
1693 | 8b9b0cc2 | Kevin Wolf | void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event)
|
1694 | 8b9b0cc2 | Kevin Wolf | { |
1695 | 8b9b0cc2 | Kevin Wolf | BlockDriver *drv = bs->drv; |
1696 | 8b9b0cc2 | Kevin Wolf | |
1697 | 8b9b0cc2 | Kevin Wolf | if (!drv || !drv->bdrv_debug_event) {
|
1698 | 8b9b0cc2 | Kevin Wolf | return;
|
1699 | 8b9b0cc2 | Kevin Wolf | } |
1700 | 8b9b0cc2 | Kevin Wolf | |
1701 | 8b9b0cc2 | Kevin Wolf | return drv->bdrv_debug_event(bs, event);
|
1702 | 8b9b0cc2 | Kevin Wolf | |
1703 | 8b9b0cc2 | Kevin Wolf | } |
1704 | 8b9b0cc2 | Kevin Wolf | |
1705 | faea38e7 | bellard | /**************************************************************/
|
1706 | faea38e7 | bellard | /* handling of snapshots */
|
1707 | faea38e7 | bellard | |
1708 | 5fafdf24 | ths | int bdrv_snapshot_create(BlockDriverState *bs,
|
1709 | faea38e7 | bellard | QEMUSnapshotInfo *sn_info) |
1710 | faea38e7 | bellard | { |
1711 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1712 | faea38e7 | bellard | if (!drv)
|
1713 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1714 | faea38e7 | bellard | if (!drv->bdrv_snapshot_create)
|
1715 | faea38e7 | bellard | return -ENOTSUP;
|
1716 | faea38e7 | bellard | return drv->bdrv_snapshot_create(bs, sn_info);
|
1717 | faea38e7 | bellard | } |
1718 | faea38e7 | bellard | |
1719 | 5fafdf24 | ths | int bdrv_snapshot_goto(BlockDriverState *bs,
|
1720 | faea38e7 | bellard | const char *snapshot_id) |
1721 | faea38e7 | bellard | { |
1722 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1723 | faea38e7 | bellard | if (!drv)
|
1724 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1725 | faea38e7 | bellard | if (!drv->bdrv_snapshot_goto)
|
1726 | faea38e7 | bellard | return -ENOTSUP;
|
1727 | faea38e7 | bellard | return drv->bdrv_snapshot_goto(bs, snapshot_id);
|
1728 | faea38e7 | bellard | } |
1729 | faea38e7 | bellard | |
1730 | faea38e7 | bellard | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
1731 | faea38e7 | bellard | { |
1732 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1733 | faea38e7 | bellard | if (!drv)
|
1734 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1735 | faea38e7 | bellard | if (!drv->bdrv_snapshot_delete)
|
1736 | faea38e7 | bellard | return -ENOTSUP;
|
1737 | faea38e7 | bellard | return drv->bdrv_snapshot_delete(bs, snapshot_id);
|
1738 | faea38e7 | bellard | } |
1739 | faea38e7 | bellard | |
1740 | 5fafdf24 | ths | int bdrv_snapshot_list(BlockDriverState *bs,
|
1741 | faea38e7 | bellard | QEMUSnapshotInfo **psn_info) |
1742 | faea38e7 | bellard | { |
1743 | faea38e7 | bellard | BlockDriver *drv = bs->drv; |
1744 | faea38e7 | bellard | if (!drv)
|
1745 | 19cb3738 | bellard | return -ENOMEDIUM;
|
1746 | faea38e7 | bellard | if (!drv->bdrv_snapshot_list)
|
1747 | faea38e7 | bellard | return -ENOTSUP;
|
1748 | faea38e7 | bellard | return drv->bdrv_snapshot_list(bs, psn_info);
|
1749 | faea38e7 | bellard | } |
1750 | faea38e7 | bellard | |
1751 | faea38e7 | bellard | #define NB_SUFFIXES 4 |
1752 | faea38e7 | bellard | |
1753 | faea38e7 | bellard | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
1754 | faea38e7 | bellard | { |
1755 | faea38e7 | bellard | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
1756 | faea38e7 | bellard | int64_t base; |
1757 | faea38e7 | bellard | int i;
|
1758 | faea38e7 | bellard | |
1759 | faea38e7 | bellard | if (size <= 999) { |
1760 | faea38e7 | bellard | snprintf(buf, buf_size, "%" PRId64, size);
|
1761 | faea38e7 | bellard | } else {
|
1762 | faea38e7 | bellard | base = 1024;
|
1763 | faea38e7 | bellard | for(i = 0; i < NB_SUFFIXES; i++) { |
1764 | faea38e7 | bellard | if (size < (10 * base)) { |
1765 | 5fafdf24 | ths | snprintf(buf, buf_size, "%0.1f%c",
|
1766 | faea38e7 | bellard | (double)size / base,
|
1767 | faea38e7 | bellard | suffixes[i]); |
1768 | faea38e7 | bellard | break;
|
1769 | faea38e7 | bellard | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
1770 | 5fafdf24 | ths | snprintf(buf, buf_size, "%" PRId64 "%c", |
1771 | faea38e7 | bellard | ((size + (base >> 1)) / base),
|
1772 | faea38e7 | bellard | suffixes[i]); |
1773 | faea38e7 | bellard | break;
|
1774 | faea38e7 | bellard | } |
1775 | faea38e7 | bellard | base = base * 1024;
|
1776 | faea38e7 | bellard | } |
1777 | faea38e7 | bellard | } |
1778 | faea38e7 | bellard | return buf;
|
1779 | faea38e7 | bellard | } |
1780 | faea38e7 | bellard | |
1781 | faea38e7 | bellard | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
1782 | faea38e7 | bellard | { |
1783 | faea38e7 | bellard | char buf1[128], date_buf[128], clock_buf[128]; |
1784 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1785 | 3b9f94e1 | bellard | struct tm *ptm;
|
1786 | 3b9f94e1 | bellard | #else
|
1787 | faea38e7 | bellard | struct tm tm;
|
1788 | 3b9f94e1 | bellard | #endif
|
1789 | faea38e7 | bellard | time_t ti; |
1790 | faea38e7 | bellard | int64_t secs; |
1791 | faea38e7 | bellard | |
1792 | faea38e7 | bellard | if (!sn) {
|
1793 | 5fafdf24 | ths | snprintf(buf, buf_size, |
1794 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1795 | faea38e7 | bellard | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
1796 | faea38e7 | bellard | } else {
|
1797 | faea38e7 | bellard | ti = sn->date_sec; |
1798 | 3b9f94e1 | bellard | #ifdef _WIN32
|
1799 | 3b9f94e1 | bellard | ptm = localtime(&ti); |
1800 | 3b9f94e1 | bellard | strftime(date_buf, sizeof(date_buf),
|
1801 | 3b9f94e1 | bellard | "%Y-%m-%d %H:%M:%S", ptm);
|
1802 | 3b9f94e1 | bellard | #else
|
1803 | faea38e7 | bellard | localtime_r(&ti, &tm); |
1804 | faea38e7 | bellard | strftime(date_buf, sizeof(date_buf),
|
1805 | faea38e7 | bellard | "%Y-%m-%d %H:%M:%S", &tm);
|
1806 | 3b9f94e1 | bellard | #endif
|
1807 | faea38e7 | bellard | secs = sn->vm_clock_nsec / 1000000000;
|
1808 | faea38e7 | bellard | snprintf(clock_buf, sizeof(clock_buf),
|
1809 | faea38e7 | bellard | "%02d:%02d:%02d.%03d",
|
1810 | faea38e7 | bellard | (int)(secs / 3600), |
1811 | faea38e7 | bellard | (int)((secs / 60) % 60), |
1812 | 5fafdf24 | ths | (int)(secs % 60), |
1813 | faea38e7 | bellard | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
1814 | faea38e7 | bellard | snprintf(buf, buf_size, |
1815 | 5fafdf24 | ths | "%-10s%-20s%7s%20s%15s",
|
1816 | faea38e7 | bellard | sn->id_str, sn->name, |
1817 | faea38e7 | bellard | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
|
1818 | faea38e7 | bellard | date_buf, |
1819 | faea38e7 | bellard | clock_buf); |
1820 | faea38e7 | bellard | } |
1821 | faea38e7 | bellard | return buf;
|
1822 | faea38e7 | bellard | } |
1823 | faea38e7 | bellard | |
1824 | 83f64091 | bellard | |
1825 | ea2384d3 | bellard | /**************************************************************/
|
1826 | 83f64091 | bellard | /* async I/Os */
|
1827 | ea2384d3 | bellard | |
1828 | 3b69e4b9 | aliguori | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
1829 | f141eafe | aliguori | QEMUIOVector *qiov, int nb_sectors,
|
1830 | 3b69e4b9 | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1831 | 3b69e4b9 | aliguori | { |
1832 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1833 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1834 | 83f64091 | bellard | |
1835 | 19cb3738 | bellard | if (!drv)
|
1836 | ce1a14dc | pbrook | return NULL; |
1837 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1838 | 71d0770c | aliguori | return NULL; |
1839 | 3b46e624 | ths | |
1840 | f141eafe | aliguori | ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors, |
1841 | f141eafe | aliguori | cb, opaque); |
1842 | a36e69dd | ths | |
1843 | a36e69dd | ths | if (ret) {
|
1844 | a36e69dd | ths | /* Update stats even though technically transfer has not happened. */
|
1845 | 6ea44308 | Jan Kiszka | bs->rd_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE;
|
1846 | a36e69dd | ths | bs->rd_ops ++; |
1847 | a36e69dd | ths | } |
1848 | a36e69dd | ths | |
1849 | a36e69dd | ths | return ret;
|
1850 | ea2384d3 | bellard | } |
1851 | ea2384d3 | bellard | |
1852 | f141eafe | aliguori | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
1853 | f141eafe | aliguori | QEMUIOVector *qiov, int nb_sectors,
|
1854 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
1855 | ea2384d3 | bellard | { |
1856 | 83f64091 | bellard | BlockDriver *drv = bs->drv; |
1857 | a36e69dd | ths | BlockDriverAIOCB *ret; |
1858 | ea2384d3 | bellard | |
1859 | 19cb3738 | bellard | if (!drv)
|
1860 | ce1a14dc | pbrook | return NULL; |
1861 | 83f64091 | bellard | if (bs->read_only)
|
1862 | ce1a14dc | pbrook | return NULL; |
1863 | 71d0770c | aliguori | if (bdrv_check_request(bs, sector_num, nb_sectors))
|
1864 | 71d0770c | aliguori | return NULL; |
1865 | 83f64091 | bellard | |
1866 | c6d22830 | Jan Kiszka | if (bs->dirty_bitmap) {
|
1867 | 7cd1e32a | lirans@il.ibm.com | set_dirty_bitmap(bs, sector_num, nb_sectors, 1);
|
1868 | 7cd1e32a | lirans@il.ibm.com | } |
1869 | a55eb92c | Jan Kiszka | |
1870 | f141eafe | aliguori | ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
1871 | f141eafe | aliguori | cb, opaque); |
1872 | a36e69dd | ths | |
1873 | a36e69dd | ths | if (ret) {
|
1874 | 294cc35f | Kevin Wolf | /* Update stats even though technically transfer has not happened. */
|
1875 | 294cc35f | Kevin Wolf | bs->wr_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE;
|
1876 | 294cc35f | Kevin Wolf | bs->wr_ops ++; |
1877 | 294cc35f | Kevin Wolf | if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { |
1878 | 294cc35f | Kevin Wolf | bs->wr_highest_sector = sector_num + nb_sectors - 1;
|
1879 | 294cc35f | Kevin Wolf | } |
1880 | a36e69dd | ths | } |
1881 | a36e69dd | ths | |
1882 | a36e69dd | ths | return ret;
|
1883 | 83f64091 | bellard | } |
1884 | 83f64091 | bellard | |
1885 | 40b4f539 | Kevin Wolf | |
1886 | 40b4f539 | Kevin Wolf | typedef struct MultiwriteCB { |
1887 | 40b4f539 | Kevin Wolf | int error;
|
1888 | 40b4f539 | Kevin Wolf | int num_requests;
|
1889 | 40b4f539 | Kevin Wolf | int num_callbacks;
|
1890 | 40b4f539 | Kevin Wolf | struct {
|
1891 | 40b4f539 | Kevin Wolf | BlockDriverCompletionFunc *cb; |
1892 | 40b4f539 | Kevin Wolf | void *opaque;
|
1893 | 40b4f539 | Kevin Wolf | QEMUIOVector *free_qiov; |
1894 | 40b4f539 | Kevin Wolf | void *free_buf;
|
1895 | 40b4f539 | Kevin Wolf | } callbacks[]; |
1896 | 40b4f539 | Kevin Wolf | } MultiwriteCB; |
1897 | 40b4f539 | Kevin Wolf | |
1898 | 40b4f539 | Kevin Wolf | static void multiwrite_user_cb(MultiwriteCB *mcb) |
1899 | 40b4f539 | Kevin Wolf | { |
1900 | 40b4f539 | Kevin Wolf | int i;
|
1901 | 40b4f539 | Kevin Wolf | |
1902 | 40b4f539 | Kevin Wolf | for (i = 0; i < mcb->num_callbacks; i++) { |
1903 | 40b4f539 | Kevin Wolf | mcb->callbacks[i].cb(mcb->callbacks[i].opaque, mcb->error); |
1904 | 1e1ea48d | Stefan Hajnoczi | if (mcb->callbacks[i].free_qiov) {
|
1905 | 1e1ea48d | Stefan Hajnoczi | qemu_iovec_destroy(mcb->callbacks[i].free_qiov); |
1906 | 1e1ea48d | Stefan Hajnoczi | } |
1907 | 40b4f539 | Kevin Wolf | qemu_free(mcb->callbacks[i].free_qiov); |
1908 | f8a83245 | Herve Poussineau | qemu_vfree(mcb->callbacks[i].free_buf); |
1909 | 40b4f539 | Kevin Wolf | } |
1910 | 40b4f539 | Kevin Wolf | } |
1911 | 40b4f539 | Kevin Wolf | |
1912 | 40b4f539 | Kevin Wolf | static void multiwrite_cb(void *opaque, int ret) |
1913 | 40b4f539 | Kevin Wolf | { |
1914 | 40b4f539 | Kevin Wolf | MultiwriteCB *mcb = opaque; |
1915 | 40b4f539 | Kevin Wolf | |
1916 | cb6d3ca0 | Kevin Wolf | if (ret < 0 && !mcb->error) { |
1917 | 40b4f539 | Kevin Wolf | mcb->error = ret; |
1918 | 40b4f539 | Kevin Wolf | multiwrite_user_cb(mcb); |
1919 | 40b4f539 | Kevin Wolf | } |
1920 | 40b4f539 | Kevin Wolf | |
1921 | 40b4f539 | Kevin Wolf | mcb->num_requests--; |
1922 | 40b4f539 | Kevin Wolf | if (mcb->num_requests == 0) { |
1923 | 40b4f539 | Kevin Wolf | if (mcb->error == 0) { |
1924 | 40b4f539 | Kevin Wolf | multiwrite_user_cb(mcb); |
1925 | 40b4f539 | Kevin Wolf | } |
1926 | 40b4f539 | Kevin Wolf | qemu_free(mcb); |
1927 | 40b4f539 | Kevin Wolf | } |
1928 | 40b4f539 | Kevin Wolf | } |
1929 | 40b4f539 | Kevin Wolf | |
1930 | 40b4f539 | Kevin Wolf | static int multiwrite_req_compare(const void *a, const void *b) |
1931 | 40b4f539 | Kevin Wolf | { |
1932 | 40b4f539 | Kevin Wolf | return (((BlockRequest*) a)->sector - ((BlockRequest*) b)->sector);
|
1933 | 40b4f539 | Kevin Wolf | } |
1934 | 40b4f539 | Kevin Wolf | |
1935 | 40b4f539 | Kevin Wolf | /*
|
1936 | 40b4f539 | Kevin Wolf | * Takes a bunch of requests and tries to merge them. Returns the number of
|
1937 | 40b4f539 | Kevin Wolf | * requests that remain after merging.
|
1938 | 40b4f539 | Kevin Wolf | */
|
1939 | 40b4f539 | Kevin Wolf | static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs, |
1940 | 40b4f539 | Kevin Wolf | int num_reqs, MultiwriteCB *mcb)
|
1941 | 40b4f539 | Kevin Wolf | { |
1942 | 40b4f539 | Kevin Wolf | int i, outidx;
|
1943 | 40b4f539 | Kevin Wolf | |
1944 | 40b4f539 | Kevin Wolf | // Sort requests by start sector
|
1945 | 40b4f539 | Kevin Wolf | qsort(reqs, num_reqs, sizeof(*reqs), &multiwrite_req_compare);
|
1946 | 40b4f539 | Kevin Wolf | |
1947 | 40b4f539 | Kevin Wolf | // Check if adjacent requests touch the same clusters. If so, combine them,
|
1948 | 40b4f539 | Kevin Wolf | // filling up gaps with zero sectors.
|
1949 | 40b4f539 | Kevin Wolf | outidx = 0;
|
1950 | 40b4f539 | Kevin Wolf | for (i = 1; i < num_reqs; i++) { |
1951 | 40b4f539 | Kevin Wolf | int merge = 0; |
1952 | 40b4f539 | Kevin Wolf | int64_t oldreq_last = reqs[outidx].sector + reqs[outidx].nb_sectors; |
1953 | 40b4f539 | Kevin Wolf | |
1954 | 40b4f539 | Kevin Wolf | // This handles the cases that are valid for all block drivers, namely
|
1955 | 40b4f539 | Kevin Wolf | // exactly sequential writes and overlapping writes.
|
1956 | 40b4f539 | Kevin Wolf | if (reqs[i].sector <= oldreq_last) {
|
1957 | 40b4f539 | Kevin Wolf | merge = 1;
|
1958 | 40b4f539 | Kevin Wolf | } |
1959 | 40b4f539 | Kevin Wolf | |
1960 | 40b4f539 | Kevin Wolf | // The block driver may decide that it makes sense to combine requests
|
1961 | 40b4f539 | Kevin Wolf | // even if there is a gap of some sectors between them. In this case,
|
1962 | 40b4f539 | Kevin Wolf | // the gap is filled with zeros (therefore only applicable for yet
|
1963 | 40b4f539 | Kevin Wolf | // unused space in format like qcow2).
|
1964 | 40b4f539 | Kevin Wolf | if (!merge && bs->drv->bdrv_merge_requests) {
|
1965 | 40b4f539 | Kevin Wolf | merge = bs->drv->bdrv_merge_requests(bs, &reqs[outidx], &reqs[i]); |
1966 | 40b4f539 | Kevin Wolf | } |
1967 | 40b4f539 | Kevin Wolf | |
1968 | e2a305fb | Christoph Hellwig | if (reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1 > IOV_MAX) { |
1969 | e2a305fb | Christoph Hellwig | merge = 0;
|
1970 | e2a305fb | Christoph Hellwig | } |
1971 | e2a305fb | Christoph Hellwig | |
1972 | 40b4f539 | Kevin Wolf | if (merge) {
|
1973 | 40b4f539 | Kevin Wolf | size_t size; |
1974 | 40b4f539 | Kevin Wolf | QEMUIOVector *qiov = qemu_mallocz(sizeof(*qiov));
|
1975 | 40b4f539 | Kevin Wolf | qemu_iovec_init(qiov, |
1976 | 40b4f539 | Kevin Wolf | reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1);
|
1977 | 40b4f539 | Kevin Wolf | |
1978 | 40b4f539 | Kevin Wolf | // Add the first request to the merged one. If the requests are
|
1979 | 40b4f539 | Kevin Wolf | // overlapping, drop the last sectors of the first request.
|
1980 | 40b4f539 | Kevin Wolf | size = (reqs[i].sector - reqs[outidx].sector) << 9;
|
1981 | 40b4f539 | Kevin Wolf | qemu_iovec_concat(qiov, reqs[outidx].qiov, size); |
1982 | 40b4f539 | Kevin Wolf | |
1983 | 40b4f539 | Kevin Wolf | // We might need to add some zeros between the two requests
|
1984 | 40b4f539 | Kevin Wolf | if (reqs[i].sector > oldreq_last) {
|
1985 | 40b4f539 | Kevin Wolf | size_t zero_bytes = (reqs[i].sector - oldreq_last) << 9;
|
1986 | 40b4f539 | Kevin Wolf | uint8_t *buf = qemu_blockalign(bs, zero_bytes); |
1987 | 40b4f539 | Kevin Wolf | memset(buf, 0, zero_bytes);
|
1988 | 40b4f539 | Kevin Wolf | qemu_iovec_add(qiov, buf, zero_bytes); |
1989 | 40b4f539 | Kevin Wolf | mcb->callbacks[i].free_buf = buf; |
1990 | 40b4f539 | Kevin Wolf | } |
1991 | 40b4f539 | Kevin Wolf | |
1992 | 40b4f539 | Kevin Wolf | // Add the second request
|
1993 | 40b4f539 | Kevin Wolf | qemu_iovec_concat(qiov, reqs[i].qiov, reqs[i].qiov->size); |
1994 | 40b4f539 | Kevin Wolf | |
1995 | 40b4f539 | Kevin Wolf | reqs[outidx].nb_sectors += reqs[i].nb_sectors; |
1996 | 40b4f539 | Kevin Wolf | reqs[outidx].qiov = qiov; |
1997 | 40b4f539 | Kevin Wolf | |
1998 | 40b4f539 | Kevin Wolf | mcb->callbacks[i].free_qiov = reqs[outidx].qiov; |
1999 | 40b4f539 | Kevin Wolf | } else {
|
2000 | 40b4f539 | Kevin Wolf | outidx++; |
2001 | 40b4f539 | Kevin Wolf | reqs[outidx].sector = reqs[i].sector; |
2002 | 40b4f539 | Kevin Wolf | reqs[outidx].nb_sectors = reqs[i].nb_sectors; |
2003 | 40b4f539 | Kevin Wolf | reqs[outidx].qiov = reqs[i].qiov; |
2004 | 40b4f539 | Kevin Wolf | } |
2005 | 40b4f539 | Kevin Wolf | } |
2006 | 40b4f539 | Kevin Wolf | |
2007 | 40b4f539 | Kevin Wolf | return outidx + 1; |
2008 | 40b4f539 | Kevin Wolf | } |
2009 | 40b4f539 | Kevin Wolf | |
2010 | 40b4f539 | Kevin Wolf | /*
|
2011 | 40b4f539 | Kevin Wolf | * Submit multiple AIO write requests at once.
|
2012 | 40b4f539 | Kevin Wolf | *
|
2013 | 40b4f539 | Kevin Wolf | * On success, the function returns 0 and all requests in the reqs array have
|
2014 | 40b4f539 | Kevin Wolf | * been submitted. In error case this function returns -1, and any of the
|
2015 | 40b4f539 | Kevin Wolf | * requests may or may not be submitted yet. In particular, this means that the
|
2016 | 40b4f539 | Kevin Wolf | * callback will be called for some of the requests, for others it won't. The
|
2017 | 40b4f539 | Kevin Wolf | * caller must check the error field of the BlockRequest to wait for the right
|
2018 | 40b4f539 | Kevin Wolf | * callbacks (if error != 0, no callback will be called).
|
2019 | 40b4f539 | Kevin Wolf | *
|
2020 | 40b4f539 | Kevin Wolf | * The implementation may modify the contents of the reqs array, e.g. to merge
|
2021 | 40b4f539 | Kevin Wolf | * requests. However, the fields opaque and error are left unmodified as they
|
2022 | 40b4f539 | Kevin Wolf | * are used to signal failure for a single request to the caller.
|
2023 | 40b4f539 | Kevin Wolf | */
|
2024 | 40b4f539 | Kevin Wolf | int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs) |
2025 | 40b4f539 | Kevin Wolf | { |
2026 | 40b4f539 | Kevin Wolf | BlockDriverAIOCB *acb; |
2027 | 40b4f539 | Kevin Wolf | MultiwriteCB *mcb; |
2028 | 40b4f539 | Kevin Wolf | int i;
|
2029 | 40b4f539 | Kevin Wolf | |
2030 | 40b4f539 | Kevin Wolf | if (num_reqs == 0) { |
2031 | 40b4f539 | Kevin Wolf | return 0; |
2032 | 40b4f539 | Kevin Wolf | } |
2033 | 40b4f539 | Kevin Wolf | |
2034 | 40b4f539 | Kevin Wolf | // Create MultiwriteCB structure
|
2035 | 40b4f539 | Kevin Wolf | mcb = qemu_mallocz(sizeof(*mcb) + num_reqs * sizeof(*mcb->callbacks)); |
2036 | 40b4f539 | Kevin Wolf | mcb->num_requests = 0;
|
2037 | 40b4f539 | Kevin Wolf | mcb->num_callbacks = num_reqs; |
2038 | 40b4f539 | Kevin Wolf | |
2039 | 40b4f539 | Kevin Wolf | for (i = 0; i < num_reqs; i++) { |
2040 | 40b4f539 | Kevin Wolf | mcb->callbacks[i].cb = reqs[i].cb; |
2041 | 40b4f539 | Kevin Wolf | mcb->callbacks[i].opaque = reqs[i].opaque; |
2042 | 40b4f539 | Kevin Wolf | } |
2043 | 40b4f539 | Kevin Wolf | |
2044 | 40b4f539 | Kevin Wolf | // Check for mergable requests
|
2045 | 40b4f539 | Kevin Wolf | num_reqs = multiwrite_merge(bs, reqs, num_reqs, mcb); |
2046 | 40b4f539 | Kevin Wolf | |
2047 | 40b4f539 | Kevin Wolf | // Run the aio requests
|
2048 | 40b4f539 | Kevin Wolf | for (i = 0; i < num_reqs; i++) { |
2049 | 40b4f539 | Kevin Wolf | acb = bdrv_aio_writev(bs, reqs[i].sector, reqs[i].qiov, |
2050 | 40b4f539 | Kevin Wolf | reqs[i].nb_sectors, multiwrite_cb, mcb); |
2051 | 40b4f539 | Kevin Wolf | |
2052 | 40b4f539 | Kevin Wolf | if (acb == NULL) { |
2053 | 40b4f539 | Kevin Wolf | // We can only fail the whole thing if no request has been
|
2054 | 40b4f539 | Kevin Wolf | // submitted yet. Otherwise we'll wait for the submitted AIOs to
|
2055 | 40b4f539 | Kevin Wolf | // complete and report the error in the callback.
|
2056 | 40b4f539 | Kevin Wolf | if (mcb->num_requests == 0) { |
2057 | 0f0b604b | Kevin Wolf | reqs[i].error = -EIO; |
2058 | 40b4f539 | Kevin Wolf | goto fail;
|
2059 | 40b4f539 | Kevin Wolf | } else {
|
2060 | 7eb58a6c | Kevin Wolf | mcb->num_requests++; |
2061 | 7eb58a6c | Kevin Wolf | multiwrite_cb(mcb, -EIO); |
2062 | 40b4f539 | Kevin Wolf | break;
|
2063 | 40b4f539 | Kevin Wolf | } |
2064 | 40b4f539 | Kevin Wolf | } else {
|
2065 | 40b4f539 | Kevin Wolf | mcb->num_requests++; |
2066 | 40b4f539 | Kevin Wolf | } |
2067 | 40b4f539 | Kevin Wolf | } |
2068 | 40b4f539 | Kevin Wolf | |
2069 | 40b4f539 | Kevin Wolf | return 0; |
2070 | 40b4f539 | Kevin Wolf | |
2071 | 40b4f539 | Kevin Wolf | fail:
|
2072 | af474591 | Bruce Rogers | qemu_free(mcb); |
2073 | 40b4f539 | Kevin Wolf | return -1; |
2074 | 40b4f539 | Kevin Wolf | } |
2075 | 40b4f539 | Kevin Wolf | |
2076 | b2e12bc6 | Christoph Hellwig | BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
2077 | b2e12bc6 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
|
2078 | b2e12bc6 | Christoph Hellwig | { |
2079 | b2e12bc6 | Christoph Hellwig | BlockDriver *drv = bs->drv; |
2080 | b2e12bc6 | Christoph Hellwig | |
2081 | b2e12bc6 | Christoph Hellwig | if (!drv)
|
2082 | b2e12bc6 | Christoph Hellwig | return NULL; |
2083 | b2e12bc6 | Christoph Hellwig | return drv->bdrv_aio_flush(bs, cb, opaque);
|
2084 | b2e12bc6 | Christoph Hellwig | } |
2085 | b2e12bc6 | Christoph Hellwig | |
2086 | 83f64091 | bellard | void bdrv_aio_cancel(BlockDriverAIOCB *acb)
|
2087 | 83f64091 | bellard | { |
2088 | 6bbff9a0 | aliguori | acb->pool->cancel(acb); |
2089 | 83f64091 | bellard | } |
2090 | 83f64091 | bellard | |
2091 | ce1a14dc | pbrook | |
2092 | 83f64091 | bellard | /**************************************************************/
|
2093 | 83f64091 | bellard | /* async block device emulation */
|
2094 | 83f64091 | bellard | |
2095 | c16b5a2c | Christoph Hellwig | typedef struct BlockDriverAIOCBSync { |
2096 | c16b5a2c | Christoph Hellwig | BlockDriverAIOCB common; |
2097 | c16b5a2c | Christoph Hellwig | QEMUBH *bh; |
2098 | c16b5a2c | Christoph Hellwig | int ret;
|
2099 | c16b5a2c | Christoph Hellwig | /* vector translation state */
|
2100 | c16b5a2c | Christoph Hellwig | QEMUIOVector *qiov; |
2101 | c16b5a2c | Christoph Hellwig | uint8_t *bounce; |
2102 | c16b5a2c | Christoph Hellwig | int is_write;
|
2103 | c16b5a2c | Christoph Hellwig | } BlockDriverAIOCBSync; |
2104 | c16b5a2c | Christoph Hellwig | |
2105 | c16b5a2c | Christoph Hellwig | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
2106 | c16b5a2c | Christoph Hellwig | { |
2107 | b666d239 | Kevin Wolf | BlockDriverAIOCBSync *acb = |
2108 | b666d239 | Kevin Wolf | container_of(blockacb, BlockDriverAIOCBSync, common); |
2109 | 6a7ad299 | Dor Laor | qemu_bh_delete(acb->bh); |
2110 | 36afc451 | Avi Kivity | acb->bh = NULL;
|
2111 | c16b5a2c | Christoph Hellwig | qemu_aio_release(acb); |
2112 | c16b5a2c | Christoph Hellwig | } |
2113 | c16b5a2c | Christoph Hellwig | |
2114 | c16b5a2c | Christoph Hellwig | static AIOPool bdrv_em_aio_pool = {
|
2115 | c16b5a2c | Christoph Hellwig | .aiocb_size = sizeof(BlockDriverAIOCBSync),
|
2116 | c16b5a2c | Christoph Hellwig | .cancel = bdrv_aio_cancel_em, |
2117 | c16b5a2c | Christoph Hellwig | }; |
2118 | c16b5a2c | Christoph Hellwig | |
2119 | ce1a14dc | pbrook | static void bdrv_aio_bh_cb(void *opaque) |
2120 | 83f64091 | bellard | { |
2121 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb = opaque; |
2122 | f141eafe | aliguori | |
2123 | f141eafe | aliguori | if (!acb->is_write)
|
2124 | f141eafe | aliguori | qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size); |
2125 | ceb42de8 | aliguori | qemu_vfree(acb->bounce); |
2126 | ce1a14dc | pbrook | acb->common.cb(acb->common.opaque, acb->ret); |
2127 | 6a7ad299 | Dor Laor | qemu_bh_delete(acb->bh); |
2128 | 36afc451 | Avi Kivity | acb->bh = NULL;
|
2129 | ce1a14dc | pbrook | qemu_aio_release(acb); |
2130 | 83f64091 | bellard | } |
2131 | beac80cd | bellard | |
2132 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
|
2133 | f141eafe | aliguori | int64_t sector_num, |
2134 | f141eafe | aliguori | QEMUIOVector *qiov, |
2135 | f141eafe | aliguori | int nb_sectors,
|
2136 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, |
2137 | f141eafe | aliguori | void *opaque,
|
2138 | f141eafe | aliguori | int is_write)
|
2139 | f141eafe | aliguori | |
2140 | 83f64091 | bellard | { |
2141 | ce1a14dc | pbrook | BlockDriverAIOCBSync *acb; |
2142 | ce1a14dc | pbrook | |
2143 | c16b5a2c | Christoph Hellwig | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
2144 | f141eafe | aliguori | acb->is_write = is_write; |
2145 | f141eafe | aliguori | acb->qiov = qiov; |
2146 | e268ca52 | aliguori | acb->bounce = qemu_blockalign(bs, qiov->size); |
2147 | f141eafe | aliguori | |
2148 | ce1a14dc | pbrook | if (!acb->bh)
|
2149 | ce1a14dc | pbrook | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
2150 | f141eafe | aliguori | |
2151 | f141eafe | aliguori | if (is_write) {
|
2152 | f141eafe | aliguori | qemu_iovec_to_buffer(acb->qiov, acb->bounce); |
2153 | f141eafe | aliguori | acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors); |
2154 | f141eafe | aliguori | } else {
|
2155 | f141eafe | aliguori | acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors); |
2156 | f141eafe | aliguori | } |
2157 | f141eafe | aliguori | |
2158 | ce1a14dc | pbrook | qemu_bh_schedule(acb->bh); |
2159 | f141eafe | aliguori | |
2160 | ce1a14dc | pbrook | return &acb->common;
|
2161 | beac80cd | bellard | } |
2162 | beac80cd | bellard | |
2163 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
|
2164 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
2165 | ce1a14dc | pbrook | BlockDriverCompletionFunc *cb, void *opaque)
|
2166 | beac80cd | bellard | { |
2167 | f141eafe | aliguori | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); |
2168 | f141eafe | aliguori | } |
2169 | 83f64091 | bellard | |
2170 | f141eafe | aliguori | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
|
2171 | f141eafe | aliguori | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
2172 | f141eafe | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
2173 | f141eafe | aliguori | { |
2174 | f141eafe | aliguori | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
2175 | beac80cd | bellard | } |
2176 | beac80cd | bellard | |
2177 | b2e12bc6 | Christoph Hellwig | static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs,
|
2178 | b2e12bc6 | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
|
2179 | b2e12bc6 | Christoph Hellwig | { |
2180 | b2e12bc6 | Christoph Hellwig | BlockDriverAIOCBSync *acb; |
2181 | b2e12bc6 | Christoph Hellwig | |
2182 | b2e12bc6 | Christoph Hellwig | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
2183 | b2e12bc6 | Christoph Hellwig | acb->is_write = 1; /* don't bounce in the completion hadler */ |
2184 | b2e12bc6 | Christoph Hellwig | acb->qiov = NULL;
|
2185 | b2e12bc6 | Christoph Hellwig | acb->bounce = NULL;
|
2186 | b2e12bc6 | Christoph Hellwig | acb->ret = 0;
|
2187 | b2e12bc6 | Christoph Hellwig | |
2188 | b2e12bc6 | Christoph Hellwig | if (!acb->bh)
|
2189 | b2e12bc6 | Christoph Hellwig | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
2190 | b2e12bc6 | Christoph Hellwig | |
2191 | b2e12bc6 | Christoph Hellwig | bdrv_flush(bs); |
2192 | b2e12bc6 | Christoph Hellwig | qemu_bh_schedule(acb->bh); |
2193 | b2e12bc6 | Christoph Hellwig | return &acb->common;
|
2194 | b2e12bc6 | Christoph Hellwig | } |
2195 | b2e12bc6 | Christoph Hellwig | |
2196 | 83f64091 | bellard | /**************************************************************/
|
2197 | 83f64091 | bellard | /* sync block device emulation */
|
2198 | ea2384d3 | bellard | |
2199 | 83f64091 | bellard | static void bdrv_rw_em_cb(void *opaque, int ret) |
2200 | 83f64091 | bellard | { |
2201 | 83f64091 | bellard | *(int *)opaque = ret;
|
2202 | ea2384d3 | bellard | } |
2203 | ea2384d3 | bellard | |
2204 | 83f64091 | bellard | #define NOT_DONE 0x7fffffff |
2205 | 83f64091 | bellard | |
2206 | 5fafdf24 | ths | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
2207 | 83f64091 | bellard | uint8_t *buf, int nb_sectors)
|
2208 | 7a6cba61 | pbrook | { |
2209 | ce1a14dc | pbrook | int async_ret;
|
2210 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
2211 | f141eafe | aliguori | struct iovec iov;
|
2212 | f141eafe | aliguori | QEMUIOVector qiov; |
2213 | 83f64091 | bellard | |
2214 | 65d6b3d8 | Kevin Wolf | async_context_push(); |
2215 | 65d6b3d8 | Kevin Wolf | |
2216 | 83f64091 | bellard | async_ret = NOT_DONE; |
2217 | 3f4cb3d3 | blueswir1 | iov.iov_base = (void *)buf;
|
2218 | f141eafe | aliguori | iov.iov_len = nb_sectors * 512;
|
2219 | f141eafe | aliguori | qemu_iovec_init_external(&qiov, &iov, 1);
|
2220 | f141eafe | aliguori | acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
2221 | f141eafe | aliguori | bdrv_rw_em_cb, &async_ret); |
2222 | 65d6b3d8 | Kevin Wolf | if (acb == NULL) { |
2223 | 65d6b3d8 | Kevin Wolf | async_ret = -1;
|
2224 | 65d6b3d8 | Kevin Wolf | goto fail;
|
2225 | 65d6b3d8 | Kevin Wolf | } |
2226 | baf35cb9 | aliguori | |
2227 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
2228 | 83f64091 | bellard | qemu_aio_wait(); |
2229 | 83f64091 | bellard | } |
2230 | baf35cb9 | aliguori | |
2231 | 65d6b3d8 | Kevin Wolf | |
2232 | 65d6b3d8 | Kevin Wolf | fail:
|
2233 | 65d6b3d8 | Kevin Wolf | async_context_pop(); |
2234 | 83f64091 | bellard | return async_ret;
|
2235 | 7a6cba61 | pbrook | } |
2236 | 7a6cba61 | pbrook | |
2237 | 83f64091 | bellard | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
2238 | 83f64091 | bellard | const uint8_t *buf, int nb_sectors) |
2239 | 83f64091 | bellard | { |
2240 | ce1a14dc | pbrook | int async_ret;
|
2241 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
2242 | f141eafe | aliguori | struct iovec iov;
|
2243 | f141eafe | aliguori | QEMUIOVector qiov; |
2244 | 83f64091 | bellard | |
2245 | 65d6b3d8 | Kevin Wolf | async_context_push(); |
2246 | 65d6b3d8 | Kevin Wolf | |
2247 | 83f64091 | bellard | async_ret = NOT_DONE; |
2248 | f141eafe | aliguori | iov.iov_base = (void *)buf;
|
2249 | f141eafe | aliguori | iov.iov_len = nb_sectors * 512;
|
2250 | f141eafe | aliguori | qemu_iovec_init_external(&qiov, &iov, 1);
|
2251 | f141eafe | aliguori | acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
2252 | f141eafe | aliguori | bdrv_rw_em_cb, &async_ret); |
2253 | 65d6b3d8 | Kevin Wolf | if (acb == NULL) { |
2254 | 65d6b3d8 | Kevin Wolf | async_ret = -1;
|
2255 | 65d6b3d8 | Kevin Wolf | goto fail;
|
2256 | 65d6b3d8 | Kevin Wolf | } |
2257 | 83f64091 | bellard | while (async_ret == NOT_DONE) {
|
2258 | 83f64091 | bellard | qemu_aio_wait(); |
2259 | 83f64091 | bellard | } |
2260 | 65d6b3d8 | Kevin Wolf | |
2261 | 65d6b3d8 | Kevin Wolf | fail:
|
2262 | 65d6b3d8 | Kevin Wolf | async_context_pop(); |
2263 | 83f64091 | bellard | return async_ret;
|
2264 | 83f64091 | bellard | } |
2265 | ea2384d3 | bellard | |
2266 | ea2384d3 | bellard | void bdrv_init(void) |
2267 | ea2384d3 | bellard | { |
2268 | 5efa9d5a | Anthony Liguori | module_call_init(MODULE_INIT_BLOCK); |
2269 | ea2384d3 | bellard | } |
2270 | ce1a14dc | pbrook | |
2271 | eb852011 | Markus Armbruster | void bdrv_init_with_whitelist(void) |
2272 | eb852011 | Markus Armbruster | { |
2273 | eb852011 | Markus Armbruster | use_bdrv_whitelist = 1;
|
2274 | eb852011 | Markus Armbruster | bdrv_init(); |
2275 | eb852011 | Markus Armbruster | } |
2276 | eb852011 | Markus Armbruster | |
2277 | c16b5a2c | Christoph Hellwig | void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs,
|
2278 | c16b5a2c | Christoph Hellwig | BlockDriverCompletionFunc *cb, void *opaque)
|
2279 | ce1a14dc | pbrook | { |
2280 | ce1a14dc | pbrook | BlockDriverAIOCB *acb; |
2281 | ce1a14dc | pbrook | |
2282 | 6bbff9a0 | aliguori | if (pool->free_aiocb) {
|
2283 | 6bbff9a0 | aliguori | acb = pool->free_aiocb; |
2284 | 6bbff9a0 | aliguori | pool->free_aiocb = acb->next; |
2285 | ce1a14dc | pbrook | } else {
|
2286 | 6bbff9a0 | aliguori | acb = qemu_mallocz(pool->aiocb_size); |
2287 | 6bbff9a0 | aliguori | acb->pool = pool; |
2288 | ce1a14dc | pbrook | } |
2289 | ce1a14dc | pbrook | acb->bs = bs; |
2290 | ce1a14dc | pbrook | acb->cb = cb; |
2291 | ce1a14dc | pbrook | acb->opaque = opaque; |
2292 | ce1a14dc | pbrook | return acb;
|
2293 | ce1a14dc | pbrook | } |
2294 | ce1a14dc | pbrook | |
2295 | ce1a14dc | pbrook | void qemu_aio_release(void *p) |
2296 | ce1a14dc | pbrook | { |
2297 | 6bbff9a0 | aliguori | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
2298 | 6bbff9a0 | aliguori | AIOPool *pool = acb->pool; |
2299 | 6bbff9a0 | aliguori | acb->next = pool->free_aiocb; |
2300 | 6bbff9a0 | aliguori | pool->free_aiocb = acb; |
2301 | ce1a14dc | pbrook | } |
2302 | 19cb3738 | bellard | |
2303 | 19cb3738 | bellard | /**************************************************************/
|
2304 | 19cb3738 | bellard | /* removable device support */
|
2305 | 19cb3738 | bellard | |
2306 | 19cb3738 | bellard | /**
|
2307 | 19cb3738 | bellard | * Return TRUE if the media is present
|
2308 | 19cb3738 | bellard | */
|
2309 | 19cb3738 | bellard | int bdrv_is_inserted(BlockDriverState *bs)
|
2310 | 19cb3738 | bellard | { |
2311 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
2312 | 19cb3738 | bellard | int ret;
|
2313 | 19cb3738 | bellard | if (!drv)
|
2314 | 19cb3738 | bellard | return 0; |
2315 | 19cb3738 | bellard | if (!drv->bdrv_is_inserted)
|
2316 | 19cb3738 | bellard | return 1; |
2317 | 19cb3738 | bellard | ret = drv->bdrv_is_inserted(bs); |
2318 | 19cb3738 | bellard | return ret;
|
2319 | 19cb3738 | bellard | } |
2320 | 19cb3738 | bellard | |
2321 | 19cb3738 | bellard | /**
|
2322 | 19cb3738 | bellard | * Return TRUE if the media changed since the last call to this
|
2323 | 5fafdf24 | ths | * function. It is currently only used for floppy disks
|
2324 | 19cb3738 | bellard | */
|
2325 | 19cb3738 | bellard | int bdrv_media_changed(BlockDriverState *bs)
|
2326 | 19cb3738 | bellard | { |
2327 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
2328 | 19cb3738 | bellard | int ret;
|
2329 | 19cb3738 | bellard | |
2330 | 19cb3738 | bellard | if (!drv || !drv->bdrv_media_changed)
|
2331 | 19cb3738 | bellard | ret = -ENOTSUP; |
2332 | 19cb3738 | bellard | else
|
2333 | 19cb3738 | bellard | ret = drv->bdrv_media_changed(bs); |
2334 | 19cb3738 | bellard | if (ret == -ENOTSUP)
|
2335 | 19cb3738 | bellard | ret = bs->media_changed; |
2336 | 19cb3738 | bellard | bs->media_changed = 0;
|
2337 | 19cb3738 | bellard | return ret;
|
2338 | 19cb3738 | bellard | } |
2339 | 19cb3738 | bellard | |
2340 | 19cb3738 | bellard | /**
|
2341 | 19cb3738 | bellard | * If eject_flag is TRUE, eject the media. Otherwise, close the tray
|
2342 | 19cb3738 | bellard | */
|
2343 | aea2a33c | Mark McLoughlin | int bdrv_eject(BlockDriverState *bs, int eject_flag) |
2344 | 19cb3738 | bellard | { |
2345 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
2346 | 19cb3738 | bellard | int ret;
|
2347 | 19cb3738 | bellard | |
2348 | aea2a33c | Mark McLoughlin | if (bs->locked) {
|
2349 | aea2a33c | Mark McLoughlin | return -EBUSY;
|
2350 | aea2a33c | Mark McLoughlin | } |
2351 | aea2a33c | Mark McLoughlin | |
2352 | 19cb3738 | bellard | if (!drv || !drv->bdrv_eject) {
|
2353 | 19cb3738 | bellard | ret = -ENOTSUP; |
2354 | 19cb3738 | bellard | } else {
|
2355 | 19cb3738 | bellard | ret = drv->bdrv_eject(bs, eject_flag); |
2356 | 19cb3738 | bellard | } |
2357 | 19cb3738 | bellard | if (ret == -ENOTSUP) {
|
2358 | 19cb3738 | bellard | if (eject_flag)
|
2359 | 19cb3738 | bellard | bdrv_close(bs); |
2360 | aea2a33c | Mark McLoughlin | ret = 0;
|
2361 | 19cb3738 | bellard | } |
2362 | aea2a33c | Mark McLoughlin | |
2363 | aea2a33c | Mark McLoughlin | return ret;
|
2364 | 19cb3738 | bellard | } |
2365 | 19cb3738 | bellard | |
2366 | 19cb3738 | bellard | int bdrv_is_locked(BlockDriverState *bs)
|
2367 | 19cb3738 | bellard | { |
2368 | 19cb3738 | bellard | return bs->locked;
|
2369 | 19cb3738 | bellard | } |
2370 | 19cb3738 | bellard | |
2371 | 19cb3738 | bellard | /**
|
2372 | 19cb3738 | bellard | * Lock or unlock the media (if it is locked, the user won't be able
|
2373 | 19cb3738 | bellard | * to eject it manually).
|
2374 | 19cb3738 | bellard | */
|
2375 | 19cb3738 | bellard | void bdrv_set_locked(BlockDriverState *bs, int locked) |
2376 | 19cb3738 | bellard | { |
2377 | 19cb3738 | bellard | BlockDriver *drv = bs->drv; |
2378 | 19cb3738 | bellard | |
2379 | 19cb3738 | bellard | bs->locked = locked; |
2380 | 19cb3738 | bellard | if (drv && drv->bdrv_set_locked) {
|
2381 | 19cb3738 | bellard | drv->bdrv_set_locked(bs, locked); |
2382 | 19cb3738 | bellard | } |
2383 | 19cb3738 | bellard | } |
2384 | 985a03b0 | ths | |
2385 | 985a03b0 | ths | /* needed for generic scsi interface */
|
2386 | 985a03b0 | ths | |
2387 | 985a03b0 | ths | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
2388 | 985a03b0 | ths | { |
2389 | 985a03b0 | ths | BlockDriver *drv = bs->drv; |
2390 | 985a03b0 | ths | |
2391 | 985a03b0 | ths | if (drv && drv->bdrv_ioctl)
|
2392 | 985a03b0 | ths | return drv->bdrv_ioctl(bs, req, buf);
|
2393 | 985a03b0 | ths | return -ENOTSUP;
|
2394 | 985a03b0 | ths | } |
2395 | 7d780669 | aliguori | |
2396 | 221f715d | aliguori | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
2397 | 221f715d | aliguori | unsigned long int req, void *buf, |
2398 | 221f715d | aliguori | BlockDriverCompletionFunc *cb, void *opaque)
|
2399 | 7d780669 | aliguori | { |
2400 | 221f715d | aliguori | BlockDriver *drv = bs->drv; |
2401 | 7d780669 | aliguori | |
2402 | 221f715d | aliguori | if (drv && drv->bdrv_aio_ioctl)
|
2403 | 221f715d | aliguori | return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque);
|
2404 | 221f715d | aliguori | return NULL; |
2405 | 7d780669 | aliguori | } |
2406 | e268ca52 | aliguori | |
2407 | 7cd1e32a | lirans@il.ibm.com | |
2408 | 7cd1e32a | lirans@il.ibm.com | |
2409 | e268ca52 | aliguori | void *qemu_blockalign(BlockDriverState *bs, size_t size)
|
2410 | e268ca52 | aliguori | { |
2411 | e268ca52 | aliguori | return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
2412 | e268ca52 | aliguori | } |
2413 | 7cd1e32a | lirans@il.ibm.com | |
2414 | 7cd1e32a | lirans@il.ibm.com | void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable) |
2415 | 7cd1e32a | lirans@il.ibm.com | { |
2416 | 7cd1e32a | lirans@il.ibm.com | int64_t bitmap_size; |
2417 | a55eb92c | Jan Kiszka | |
2418 | aaa0eb75 | Liran Schour | bs->dirty_count = 0;
|
2419 | a55eb92c | Jan Kiszka | if (enable) {
|
2420 | c6d22830 | Jan Kiszka | if (!bs->dirty_bitmap) {
|
2421 | c6d22830 | Jan Kiszka | bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS) + |
2422 | c6d22830 | Jan Kiszka | BDRV_SECTORS_PER_DIRTY_CHUNK * 8 - 1; |
2423 | c6d22830 | Jan Kiszka | bitmap_size /= BDRV_SECTORS_PER_DIRTY_CHUNK * 8;
|
2424 | a55eb92c | Jan Kiszka | |
2425 | 7cd1e32a | lirans@il.ibm.com | bs->dirty_bitmap = qemu_mallocz(bitmap_size); |
2426 | a55eb92c | Jan Kiszka | } |
2427 | 7cd1e32a | lirans@il.ibm.com | } else {
|
2428 | c6d22830 | Jan Kiszka | if (bs->dirty_bitmap) {
|
2429 | 7cd1e32a | lirans@il.ibm.com | qemu_free(bs->dirty_bitmap); |
2430 | c6d22830 | Jan Kiszka | bs->dirty_bitmap = NULL;
|
2431 | a55eb92c | Jan Kiszka | } |
2432 | 7cd1e32a | lirans@il.ibm.com | } |
2433 | 7cd1e32a | lirans@il.ibm.com | } |
2434 | 7cd1e32a | lirans@il.ibm.com | |
2435 | 7cd1e32a | lirans@il.ibm.com | int bdrv_get_dirty(BlockDriverState *bs, int64_t sector)
|
2436 | 7cd1e32a | lirans@il.ibm.com | { |
2437 | 6ea44308 | Jan Kiszka | int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; |
2438 | a55eb92c | Jan Kiszka | |
2439 | c6d22830 | Jan Kiszka | if (bs->dirty_bitmap &&
|
2440 | c6d22830 | Jan Kiszka | (sector << BDRV_SECTOR_BITS) < bdrv_getlength(bs)) { |
2441 | c6d22830 | Jan Kiszka | return bs->dirty_bitmap[chunk / (sizeof(unsigned long) * 8)] & |
2442 | c6d22830 | Jan Kiszka | (1 << (chunk % (sizeof(unsigned long) * 8))); |
2443 | 7cd1e32a | lirans@il.ibm.com | } else {
|
2444 | 7cd1e32a | lirans@il.ibm.com | return 0; |
2445 | 7cd1e32a | lirans@il.ibm.com | } |
2446 | 7cd1e32a | lirans@il.ibm.com | } |
2447 | 7cd1e32a | lirans@il.ibm.com | |
2448 | a55eb92c | Jan Kiszka | void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector,
|
2449 | a55eb92c | Jan Kiszka | int nr_sectors)
|
2450 | 7cd1e32a | lirans@il.ibm.com | { |
2451 | 7cd1e32a | lirans@il.ibm.com | set_dirty_bitmap(bs, cur_sector, nr_sectors, 0);
|
2452 | 7cd1e32a | lirans@il.ibm.com | } |
2453 | aaa0eb75 | Liran Schour | |
2454 | aaa0eb75 | Liran Schour | int64_t bdrv_get_dirty_count(BlockDriverState *bs) |
2455 | aaa0eb75 | Liran Schour | { |
2456 | aaa0eb75 | Liran Schour | return bs->dirty_count;
|
2457 | aaa0eb75 | Liran Schour | } |