diff options
Diffstat (limited to 'bootdevice.c')
| -rw-r--r-- | bootdevice.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/bootdevice.c b/bootdevice.c new file mode 100644 index 000000000..b29970c7a --- /dev/null +++ b/bootdevice.c @@ -0,0 +1,258 @@ +/* + * QEMU Boot Device Implement + * + * Copyright (c) 2014 HUAWEI TECHNOLOGIES CO.,LTD. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "sysemu/sysemu.h" +#include "qapi/visitor.h" +#include "qemu/error-report.h" + +typedef struct FWBootEntry FWBootEntry; + +struct FWBootEntry { + QTAILQ_ENTRY(FWBootEntry) link; + int32_t bootindex; + DeviceState *dev; + char *suffix; +}; + +static QTAILQ_HEAD(, FWBootEntry) fw_boot_order = + QTAILQ_HEAD_INITIALIZER(fw_boot_order); + +void check_boot_index(int32_t bootindex, Error **errp) +{ + FWBootEntry *i; + + if (bootindex >= 0) { + QTAILQ_FOREACH(i, &fw_boot_order, link) { + if (i->bootindex == bootindex) { + error_setg(errp, "The bootindex %d has already been used", + bootindex); + return; + } + } + } +} + +void del_boot_device_path(DeviceState *dev, const char *suffix) +{ + FWBootEntry *i; + + if (dev == NULL) { + return; + } + + QTAILQ_FOREACH(i, &fw_boot_order, link) { + if ((!suffix || !g_strcmp0(i->suffix, suffix)) && + i->dev == dev) { + QTAILQ_REMOVE(&fw_boot_order, i, link); + g_free(i->suffix); + g_free(i); + + break; + } + } +} + +void add_boot_device_path(int32_t bootindex, DeviceState *dev, + const char *suffix) +{ + FWBootEntry *node, *i; + + if (bootindex < 0) { + del_boot_device_path(dev, suffix); + return; + } + + assert(dev != NULL || suffix != NULL); + + del_boot_device_path(dev, suffix); + + node = g_malloc0(sizeof(FWBootEntry)); + node->bootindex = bootindex; + node->suffix = g_strdup(suffix); + node->dev = dev; + + QTAILQ_FOREACH(i, &fw_boot_order, link) { + if (i->bootindex == bootindex) { + error_report("Two devices with same boot index %d", bootindex); + exit(1); + } else if (i->bootindex < bootindex) { + continue; + } + QTAILQ_INSERT_BEFORE(i, node, link); + return; + } + QTAILQ_INSERT_TAIL(&fw_boot_order, node, link); +} + +DeviceState *get_boot_device(uint32_t position) +{ + uint32_t counter = 0; + FWBootEntry *i = NULL; + DeviceState *res = NULL; + + if (!QTAILQ_EMPTY(&fw_boot_order)) { + QTAILQ_FOREACH(i, &fw_boot_order, link) { + if (counter == position) { + res = i->dev; + break; + } + counter++; + } + } + return res; +} + +/* + * This function returns null terminated string that consist of new line + * separated device paths. + * + * memory pointed by "size" is assigned total length of the array in bytes + * + */ +char *get_boot_devices_list(size_t *size, bool ignore_suffixes) +{ + FWBootEntry *i; + size_t total = 0; + char *list = NULL; + + QTAILQ_FOREACH(i, &fw_boot_order, link) { + char *devpath = NULL, *bootpath; + size_t len; + + if (i->dev) { + devpath = qdev_get_fw_dev_path(i->dev); + assert(devpath); + } + + if (i->suffix && !ignore_suffixes && devpath) { + size_t bootpathlen = strlen(devpath) + strlen(i->suffix) + 1; + + bootpath = g_malloc(bootpathlen); + snprintf(bootpath, bootpathlen, "%s%s", devpath, i->suffix); + g_free(devpath); + } else if (devpath) { + bootpath = devpath; + } else if (!ignore_suffixes) { + assert(i->suffix); + bootpath = g_strdup(i->suffix); + } else { + bootpath = g_strdup(""); + } + + if (total) { + list[total-1] = '\n'; + } + len = strlen(bootpath) + 1; + list = g_realloc(list, total + len); + memcpy(&list[total], bootpath, len); + total += len; + g_free(bootpath); + } + + *size = total; + + if (boot_strict && *size > 0) { + list[total-1] = '\n'; + list = g_realloc(list, total + 5); + memcpy(&list[total], "HALT", 5); + *size = total + 5; + } + return list; +} + +typedef struct { + int32_t *bootindex; + const char *suffix; + DeviceState *dev; +} BootIndexProperty; + +static void device_get_bootindex(Object *obj, Visitor *v, void *opaque, + const char *name, Error **errp) +{ + BootIndexProperty *prop = opaque; + visit_type_int32(v, prop->bootindex, name, errp); +} + +static void device_set_bootindex(Object *obj, Visitor *v, void *opaque, + const char *name, Error **errp) +{ + BootIndexProperty *prop = opaque; + int32_t boot_index; + Error *local_err = NULL; + + visit_type_int32(v, &boot_index, name, &local_err); + if (local_err) { + goto out; + } + /* check whether bootindex is present in fw_boot_order list */ + check_boot_index(boot_index, &local_err); + if (local_err) { + goto out; + } + /* change bootindex to a new one */ + *prop->bootindex = boot_index; + + add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix); + +out: + if (local_err) { + error_propagate(errp, local_err); + } +} + +static void property_release_bootindex(Object *obj, const char *name, + void *opaque) + +{ + BootIndexProperty *prop = opaque; + + del_boot_device_path(prop->dev, prop->suffix); + g_free(prop); +} + +void device_add_bootindex_property(Object *obj, int32_t *bootindex, + const char *name, const char *suffix, + DeviceState *dev, Error **errp) +{ + Error *local_err = NULL; + BootIndexProperty *prop = g_malloc0(sizeof(*prop)); + + prop->bootindex = bootindex; + prop->suffix = suffix; + prop->dev = dev; + + object_property_add(obj, name, "int32", + device_get_bootindex, + device_set_bootindex, + property_release_bootindex, + prop, &local_err); + + if (local_err) { + error_propagate(errp, local_err); + g_free(prop); + return; + } + /* initialize devices' bootindex property to -1 */ + object_property_set_int(obj, -1, name, NULL); +} |