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qemu-patch-raspberry4/bootdevice.c
Markus Armbruster 992861fb1e error: Eliminate error_propagate() manually 
When all we do with an Error we receive into a local variable is
propagating to somewhere else, we can just as well receive it there
right away.  The previous two commits did that for sufficiently simple
cases with Coccinelle.  Do it for several more manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200707160613.848843-37-armbru@redhat.com>
2020-07-10 15:18:08 +02:00

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/*
* 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 "qemu/osdep.h"
#include "qapi/error.h"
#include "sysemu/sysemu.h"
#include "qapi/visitor.h"
#include "qemu/error-report.h"
#include "sysemu/reset.h"
#include "hw/qdev-core.h"
#include "hw/boards.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);
static QEMUBootSetHandler *boot_set_handler;
static void *boot_set_opaque;
void qemu_register_boot_set(QEMUBootSetHandler *func, void *opaque)
{
boot_set_handler = func;
boot_set_opaque = opaque;
}
void qemu_boot_set(const char *boot_order, Error **errp)
{
Error *local_err = NULL;
if (!boot_set_handler) {
error_setg(errp, "no function defined to set boot device list for"
" this architecture");
return;
}
validate_bootdevices(boot_order, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
boot_set_handler(boot_set_opaque, boot_order, errp);
}
void validate_bootdevices(const char *devices, Error **errp)
{
/* We just do some generic consistency checks */
const char *p;
int bitmap = 0;
for (p = devices; *p != '\0'; p++) {
/* Allowed boot devices are:
* a-b: floppy disk drives
* c-f: IDE disk drives
* g-m: machine implementation dependent drives
* n-p: network devices
* It's up to each machine implementation to check if the given boot
* devices match the actual hardware implementation and firmware
* features.
*/
if (*p < 'a' || *p > 'p') {
error_setg(errp, "Invalid boot device '%c'", *p);
return;
}
if (bitmap & (1 << (*p - 'a'))) {
error_setg(errp, "Boot device '%c' was given twice", *p);
return;
}
bitmap |= 1 << (*p - 'a');
}
}
void restore_boot_order(void *opaque)
{
char *normal_boot_order = opaque;
static int first = 1;
/* Restore boot order and remove ourselves after the first boot */
if (first) {
first = 0;
return;
}
if (boot_set_handler) {
qemu_boot_set(normal_boot_order, &error_abort);
}
qemu_unregister_reset(restore_boot_order, normal_boot_order);
g_free(normal_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;
}
static char *get_boot_device_path(DeviceState *dev, bool ignore_suffixes,
const char *suffix)
{
char *devpath = NULL, *s = NULL, *d, *bootpath;
if (dev) {
devpath = qdev_get_fw_dev_path(dev);
assert(devpath);
}
if (!ignore_suffixes) {
if (dev) {
d = qdev_get_own_fw_dev_path_from_handler(dev->parent_bus, dev);
if (d) {
assert(!suffix);
s = d;
} else {
s = g_strdup(suffix);
}
} else {
s = g_strdup(suffix);
}
}
bootpath = g_strdup_printf("%s%s",
devpath ? devpath : "",
s ? s : "");
g_free(devpath);
g_free(s);
return bootpath;
}
/*
* 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)
{
FWBootEntry *i;
size_t total = 0;
char *list = NULL;
MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
bool ignore_suffixes = mc->ignore_boot_device_suffixes;
QTAILQ_FOREACH(i, &fw_boot_order, link) {
char *bootpath;
size_t len;
bootpath = get_boot_device_path(i->dev, ignore_suffixes, i->suffix);
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, const char *name,
void *opaque, Error **errp)
{
BootIndexProperty *prop = opaque;
visit_type_int32(v, name, prop->bootindex, errp);
}
static void device_set_bootindex(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
BootIndexProperty *prop = opaque;
int32_t boot_index;
Error *local_err = NULL;
if (!visit_type_int32(v, name, &boot_index, errp)) {
return;
}
/* check whether bootindex is present in fw_boot_order list */
check_boot_index(boot_index, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
/* change bootindex to a new one */
*prop->bootindex = boot_index;
add_boot_device_path(*prop->bootindex, prop->dev, prop->suffix);
}
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)
{
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);
/* initialize devices' bootindex property to -1 */
object_property_set_int(obj, name, -1, NULL);
}
typedef struct FWLCHSEntry FWLCHSEntry;
struct FWLCHSEntry {
QTAILQ_ENTRY(FWLCHSEntry) link;
DeviceState *dev;
char *suffix;
uint32_t lcyls;
uint32_t lheads;
uint32_t lsecs;
};
static QTAILQ_HEAD(, FWLCHSEntry) fw_lchs =
QTAILQ_HEAD_INITIALIZER(fw_lchs);
void add_boot_device_lchs(DeviceState *dev, const char *suffix,
uint32_t lcyls, uint32_t lheads, uint32_t lsecs)
{
FWLCHSEntry *node;
if (!lcyls && !lheads && !lsecs) {
return;
}
assert(dev != NULL || suffix != NULL);
node = g_malloc0(sizeof(FWLCHSEntry));
node->suffix = g_strdup(suffix);
node->dev = dev;
node->lcyls = lcyls;
node->lheads = lheads;
node->lsecs = lsecs;
QTAILQ_INSERT_TAIL(&fw_lchs, node, link);
}
void del_boot_device_lchs(DeviceState *dev, const char *suffix)
{
FWLCHSEntry *i;
if (dev == NULL) {
return;
}
QTAILQ_FOREACH(i, &fw_lchs, link) {
if ((!suffix || !g_strcmp0(i->suffix, suffix)) &&
i->dev == dev) {
QTAILQ_REMOVE(&fw_lchs, i, link);
g_free(i->suffix);
g_free(i);
break;
}
}
}
char *get_boot_devices_lchs_list(size_t *size)
{
FWLCHSEntry *i;
size_t total = 0;
char *list = NULL;
QTAILQ_FOREACH(i, &fw_lchs, link) {
char *bootpath;
char *chs_string;
size_t len;
bootpath = get_boot_device_path(i->dev, false, i->suffix);
chs_string = g_strdup_printf("%s %" PRIu32 " %" PRIu32 " %" PRIu32,
bootpath, i->lcyls, i->lheads, i->lsecs);
if (total) {
list[total - 1] = '\n';
}
len = strlen(chs_string) + 1;
list = g_realloc(list, total + len);
memcpy(&list[total], chs_string, len);
total += len;
g_free(chs_string);
g_free(bootpath);
}
*size = total;
return list;
}
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