143 lines
4.0 KiB
C
143 lines
4.0 KiB
C
/*
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* QEMU Boot Device Implement
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*
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* Copyright (c) 2014 HUAWEI TECHNOLOGIES CO.,LTD.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysemu/sysemu.h"
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typedef struct FWBootEntry FWBootEntry;
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struct FWBootEntry {
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QTAILQ_ENTRY(FWBootEntry) link;
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int32_t bootindex;
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DeviceState *dev;
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char *suffix;
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};
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static QTAILQ_HEAD(, FWBootEntry) fw_boot_order =
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QTAILQ_HEAD_INITIALIZER(fw_boot_order);
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void add_boot_device_path(int32_t bootindex, DeviceState *dev,
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const char *suffix)
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{
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FWBootEntry *node, *i;
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if (bootindex < 0) {
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return;
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}
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assert(dev != NULL || suffix != NULL);
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node = g_malloc0(sizeof(FWBootEntry));
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node->bootindex = bootindex;
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node->suffix = g_strdup(suffix);
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node->dev = dev;
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QTAILQ_FOREACH(i, &fw_boot_order, link) {
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if (i->bootindex == bootindex) {
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fprintf(stderr, "Two devices with same boot index %d\n", bootindex);
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exit(1);
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} else if (i->bootindex < bootindex) {
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continue;
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}
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QTAILQ_INSERT_BEFORE(i, node, link);
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return;
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}
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QTAILQ_INSERT_TAIL(&fw_boot_order, node, link);
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}
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DeviceState *get_boot_device(uint32_t position)
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{
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uint32_t counter = 0;
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FWBootEntry *i = NULL;
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DeviceState *res = NULL;
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if (!QTAILQ_EMPTY(&fw_boot_order)) {
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QTAILQ_FOREACH(i, &fw_boot_order, link) {
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if (counter == position) {
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res = i->dev;
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break;
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}
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counter++;
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}
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}
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return res;
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}
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/*
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* This function returns null terminated string that consist of new line
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* separated device paths.
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*
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* memory pointed by "size" is assigned total length of the array in bytes
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*
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*/
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char *get_boot_devices_list(size_t *size, bool ignore_suffixes)
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{
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FWBootEntry *i;
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size_t total = 0;
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char *list = NULL;
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QTAILQ_FOREACH(i, &fw_boot_order, link) {
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char *devpath = NULL, *bootpath;
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size_t len;
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if (i->dev) {
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devpath = qdev_get_fw_dev_path(i->dev);
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assert(devpath);
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}
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if (i->suffix && !ignore_suffixes && devpath) {
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size_t bootpathlen = strlen(devpath) + strlen(i->suffix) + 1;
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bootpath = g_malloc(bootpathlen);
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snprintf(bootpath, bootpathlen, "%s%s", devpath, i->suffix);
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g_free(devpath);
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} else if (devpath) {
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bootpath = devpath;
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} else if (!ignore_suffixes) {
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assert(i->suffix);
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bootpath = g_strdup(i->suffix);
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} else {
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bootpath = g_strdup("");
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}
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if (total) {
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list[total-1] = '\n';
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}
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len = strlen(bootpath) + 1;
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list = g_realloc(list, total + len);
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memcpy(&list[total], bootpath, len);
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total += len;
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g_free(bootpath);
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}
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*size = total;
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if (boot_strict && *size > 0) {
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list[total-1] = '\n';
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list = g_realloc(list, total + 5);
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memcpy(&list[total], "HALT", 5);
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*size = total + 5;
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}
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return list;
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}
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