Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 1 | /* |
| 2 | * QEMU Boot Device Implement |
| 3 | * |
| 4 | * Copyright (c) 2014 HUAWEI TECHNOLOGIES CO.,LTD. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include "sysemu/sysemu.h" |
Gonglei | 12da309 | 2014-10-07 16:00:11 +0800 | [diff] [blame] | 26 | #include "qapi/visitor.h" |
Gonglei | 54086fe | 2014-10-07 16:00:38 +0800 | [diff] [blame] | 27 | #include "qemu/error-report.h" |
Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 28 | |
| 29 | typedef struct FWBootEntry FWBootEntry; |
| 30 | |
| 31 | struct FWBootEntry { |
| 32 | QTAILQ_ENTRY(FWBootEntry) link; |
| 33 | int32_t bootindex; |
| 34 | DeviceState *dev; |
| 35 | char *suffix; |
| 36 | }; |
| 37 | |
| 38 | static QTAILQ_HEAD(, FWBootEntry) fw_boot_order = |
| 39 | QTAILQ_HEAD_INITIALIZER(fw_boot_order); |
| 40 | |
Gonglei | 694fb85 | 2014-10-07 16:00:06 +0800 | [diff] [blame] | 41 | void check_boot_index(int32_t bootindex, Error **errp) |
| 42 | { |
| 43 | FWBootEntry *i; |
| 44 | |
| 45 | if (bootindex >= 0) { |
| 46 | QTAILQ_FOREACH(i, &fw_boot_order, link) { |
| 47 | if (i->bootindex == bootindex) { |
| 48 | error_setg(errp, "The bootindex %d has already been used", |
| 49 | bootindex); |
| 50 | return; |
| 51 | } |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | |
Gonglei | 9d27572 | 2014-10-07 16:00:07 +0800 | [diff] [blame] | 56 | void del_boot_device_path(DeviceState *dev, const char *suffix) |
| 57 | { |
| 58 | FWBootEntry *i; |
| 59 | |
| 60 | if (dev == NULL) { |
| 61 | return; |
| 62 | } |
| 63 | |
| 64 | QTAILQ_FOREACH(i, &fw_boot_order, link) { |
| 65 | if ((!suffix || !g_strcmp0(i->suffix, suffix)) && |
| 66 | i->dev == dev) { |
| 67 | QTAILQ_REMOVE(&fw_boot_order, i, link); |
| 68 | g_free(i->suffix); |
| 69 | g_free(i); |
| 70 | |
| 71 | break; |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | |
Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 76 | void add_boot_device_path(int32_t bootindex, DeviceState *dev, |
| 77 | const char *suffix) |
| 78 | { |
| 79 | FWBootEntry *node, *i; |
| 80 | |
| 81 | if (bootindex < 0) { |
Gonglei | a598f2f | 2014-10-07 16:00:10 +0800 | [diff] [blame] | 82 | del_boot_device_path(dev, suffix); |
Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 83 | return; |
| 84 | } |
| 85 | |
| 86 | assert(dev != NULL || suffix != NULL); |
| 87 | |
Gonglei | e614b54 | 2014-10-07 16:00:09 +0800 | [diff] [blame] | 88 | del_boot_device_path(dev, suffix); |
| 89 | |
Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 90 | node = g_malloc0(sizeof(FWBootEntry)); |
| 91 | node->bootindex = bootindex; |
| 92 | node->suffix = g_strdup(suffix); |
| 93 | node->dev = dev; |
| 94 | |
| 95 | QTAILQ_FOREACH(i, &fw_boot_order, link) { |
| 96 | if (i->bootindex == bootindex) { |
Gonglei | 54086fe | 2014-10-07 16:00:38 +0800 | [diff] [blame] | 97 | error_report("Two devices with same boot index %d", bootindex); |
Gonglei | bc74112 | 2014-10-07 16:00:05 +0800 | [diff] [blame] | 98 | exit(1); |
| 99 | } else if (i->bootindex < bootindex) { |
| 100 | continue; |
| 101 | } |
| 102 | QTAILQ_INSERT_BEFORE(i, node, link); |
| 103 | return; |
| 104 | } |
| 105 | QTAILQ_INSERT_TAIL(&fw_boot_order, node, link); |
| 106 | } |
| 107 | |
| 108 | DeviceState *get_boot_device(uint32_t position) |
| 109 | { |
| 110 | uint32_t counter = 0; |
| 111 | FWBootEntry *i = NULL; |
| 112 | DeviceState *res = NULL; |
| 113 | |
| 114 | if (!QTAILQ_EMPTY(&fw_boot_order)) { |
| 115 | QTAILQ_FOREACH(i, &fw_boot_order, link) { |
| 116 | if (counter == position) { |
| 117 | res = i->dev; |
| 118 | break; |
| 119 | } |
| 120 | counter++; |
| 121 | } |
| 122 | } |
| 123 | return res; |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * This function returns null terminated string that consist of new line |
| 128 | * separated device paths. |
| 129 | * |
| 130 | * memory pointed by "size" is assigned total length of the array in bytes |
| 131 | * |
| 132 | */ |
| 133 | char *get_boot_devices_list(size_t *size, bool ignore_suffixes) |
| 134 | { |
| 135 | FWBootEntry *i; |
| 136 | size_t total = 0; |
| 137 | char *list = NULL; |
| 138 | |
| 139 | QTAILQ_FOREACH(i, &fw_boot_order, link) { |
| 140 | char *devpath = NULL, *bootpath; |
| 141 | size_t len; |
| 142 | |
| 143 | if (i->dev) { |
| 144 | devpath = qdev_get_fw_dev_path(i->dev); |
| 145 | assert(devpath); |
| 146 | } |
| 147 | |
| 148 | if (i->suffix && !ignore_suffixes && devpath) { |
| 149 | size_t bootpathlen = strlen(devpath) + strlen(i->suffix) + 1; |
| 150 | |
| 151 | bootpath = g_malloc(bootpathlen); |
| 152 | snprintf(bootpath, bootpathlen, "%s%s", devpath, i->suffix); |
| 153 | g_free(devpath); |
| 154 | } else if (devpath) { |
| 155 | bootpath = devpath; |
| 156 | } else if (!ignore_suffixes) { |
| 157 | assert(i->suffix); |
| 158 | bootpath = g_strdup(i->suffix); |
| 159 | } else { |
| 160 | bootpath = g_strdup(""); |
| 161 | } |
| 162 | |
| 163 | if (total) { |
| 164 | list[total-1] = '\n'; |
| 165 | } |
| 166 | len = strlen(bootpath) + 1; |
| 167 | list = g_realloc(list, total + len); |
| 168 | memcpy(&list[total], bootpath, len); |
| 169 | total += len; |
| 170 | g_free(bootpath); |
| 171 | } |
| 172 | |
| 173 | *size = total; |
| 174 | |
| 175 | if (boot_strict && *size > 0) { |
| 176 | list[total-1] = '\n'; |
| 177 | list = g_realloc(list, total + 5); |
| 178 | memcpy(&list[total], "HALT", 5); |
| 179 | *size = total + 5; |
| 180 | } |
| 181 | return list; |
| 182 | } |
Gonglei | 12da309 | 2014-10-07 16:00:11 +0800 | [diff] [blame] | 183 | |
| 184 | typedef struct { |
| 185 | int32_t *bootindex; |
| 186 | const char *suffix; |
| 187 | DeviceState *dev; |
| 188 | } BootIndexProperty; |
| 189 | |
| 190 | static void device_get_bootindex(Object *obj, Visitor *v, void *opaque, |
| 191 | const char *name, Error **errp) |
| 192 | { |
| 193 | BootIndexProperty *prop = opaque; |
| 194 | visit_type_int32(v, prop->bootindex, name, errp); |
| 195 | } |
| 196 | |
| 197 | static void device_set_bootindex(Object *obj, Visitor *v, void *opaque, |
| 198 | const char *name, Error **errp) |
| 199 | { |
| 200 | BootIndexProperty *prop = opaque; |
| 201 | int32_t boot_index; |
| 202 | Error *local_err = NULL; |
| 203 | |
| 204 | visit_type_int32(v, &boot_index, name, &local_err); |
| 205 | if (local_err) { |
| 206 | goto out; |
| 207 | } |
| 208 | /* check whether bootindex is present in fw_boot_order list */ |
| 209 | check_boot_index(boot_index, &local_err); |
| 210 | if (local_err) { |
| 211 | goto out; |
| 212 | } |
| 213 | /* change bootindex to a new one */ |
| 214 | *prop->bootindex = boot_index; |
| 215 | |
Gonglei | d749e10 | 2014-10-07 16:00:36 +0800 | [diff] [blame] | 216 | add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix); |
| 217 | |
Gonglei | 12da309 | 2014-10-07 16:00:11 +0800 | [diff] [blame] | 218 | out: |
| 219 | if (local_err) { |
| 220 | error_propagate(errp, local_err); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | static void property_release_bootindex(Object *obj, const char *name, |
| 225 | void *opaque) |
| 226 | |
| 227 | { |
| 228 | BootIndexProperty *prop = opaque; |
Gonglei | 4aca8a8 | 2014-10-07 16:00:37 +0800 | [diff] [blame] | 229 | |
| 230 | del_boot_device_path(prop->dev, prop->suffix); |
Gonglei | 12da309 | 2014-10-07 16:00:11 +0800 | [diff] [blame] | 231 | g_free(prop); |
| 232 | } |
| 233 | |
| 234 | void device_add_bootindex_property(Object *obj, int32_t *bootindex, |
| 235 | const char *name, const char *suffix, |
| 236 | DeviceState *dev, Error **errp) |
| 237 | { |
| 238 | Error *local_err = NULL; |
| 239 | BootIndexProperty *prop = g_malloc0(sizeof(*prop)); |
| 240 | |
| 241 | prop->bootindex = bootindex; |
| 242 | prop->suffix = suffix; |
| 243 | prop->dev = dev; |
| 244 | |
| 245 | object_property_add(obj, name, "int32", |
| 246 | device_get_bootindex, |
| 247 | device_set_bootindex, |
| 248 | property_release_bootindex, |
| 249 | prop, &local_err); |
| 250 | |
| 251 | if (local_err) { |
| 252 | error_propagate(errp, local_err); |
| 253 | g_free(prop); |
| 254 | return; |
| 255 | } |
| 256 | /* initialize devices' bootindex property to -1 */ |
| 257 | object_property_set_int(obj, -1, name, NULL); |
| 258 | } |