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mock-variables.c
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// SPDX-License-Identifier: BSD-2-Clause-Patent
/*
* mock-variables.c - a mock GetVariable/SetVariable/GNVN/etc
* implementation for testing.
* Copyright Peter Jones <[email protected]>
*/
#include "shim.h"
#include "mock-variables.h"
#include <dirent.h>
#include <efivar/efivar.h>
#include <err.h>
#include <fcntl.h>
#include <inttypes.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wunused-function"
list_t mock_default_variable_limits;
list_t *mock_qvi_limits = &mock_default_variable_limits;
list_t *mock_sv_limits = &mock_default_variable_limits;
list_t mock_variables = LIST_HEAD_INIT(mock_variables);
mock_sort_policy_t mock_variable_sort_policy = MOCK_SORT_APPEND;
mock_sort_policy_t mock_config_table_sort_policy = MOCK_SORT_APPEND;
UINT32 mock_variable_delete_attr_policy;
mock_set_variable_pre_hook_t *mock_set_variable_pre_hook = NULL;
mock_set_variable_post_hook_t *mock_set_variable_post_hook = NULL;
mock_get_variable_pre_hook_t *mock_get_variable_pre_hook = NULL;
mock_get_variable_post_hook_t *mock_get_variable_post_hook = NULL;
mock_get_next_variable_name_pre_hook_t *mock_get_next_variable_name_pre_hook = NULL;
mock_get_next_variable_name_post_hook_t *mock_get_next_variable_name_post_hook = NULL;
mock_query_variable_info_pre_hook_t *mock_query_variable_info_pre_hook = NULL;
mock_query_variable_info_post_hook_t *mock_query_variable_info_post_hook = NULL;
static EFI_STATUS
mock_sv_pre_hook(CHAR16 *name, EFI_GUID *guid, UINT32 attrs, UINTN size,
VOID *data)
{
EFI_STATUS status = EFI_SUCCESS;
if (mock_set_variable_pre_hook)
status = mock_set_variable_pre_hook(name, guid,
attrs, size, data);
return status;
}
static void
mock_sv_post_hook_(CHAR16 *name, EFI_GUID *guid, UINT32 attrs, UINTN size,
VOID *data, EFI_STATUS *status, mock_variable_op_t op,
const char * const file, const int line,
const char * const func)
{
if (mock_set_variable_post_hook)
mock_set_variable_post_hook(name, guid, attrs, size,
data, status, op, file, line, func);
}
#define mock_sv_post_hook(name, guid, attrs, size, data, status, op) \
mock_sv_post_hook_(name, guid, attrs, size, data, status, op,\
__FILE__, __LINE__, __func__)
static EFI_STATUS
mock_gv_pre_hook(CHAR16 *name, EFI_GUID *guid, UINT32 *attrs, UINTN *size,
VOID *data)
{
EFI_STATUS status = EFI_SUCCESS;
if (mock_get_variable_pre_hook)
status = mock_get_variable_pre_hook(name, guid,
attrs, size, data);
return status;
}
static void
mock_gv_post_hook_(CHAR16 *name, EFI_GUID *guid, UINT32 *attrs, UINTN *size,
VOID *data, EFI_STATUS *status, const char * const file,
const int line, const char * const func)
{
if (mock_get_variable_post_hook)
mock_get_variable_post_hook(name, guid, attrs, size, data,
status, file, line, func);
}
#define mock_gv_post_hook(name, guid, attrs, size, data, status) \
mock_gv_post_hook_(name, guid, attrs, size, data, status,\
__FILE__, __LINE__, __func__)
static EFI_STATUS
mock_gnvn_pre_hook(UINTN *size, CHAR16 *name, EFI_GUID *guid)
{
EFI_STATUS status = EFI_SUCCESS;
if (mock_get_next_variable_name_pre_hook)
status = mock_get_next_variable_name_pre_hook(size, name, guid);
return status;
}
static void
mock_gnvn_post_hook_(UINTN *size, CHAR16 *name, EFI_GUID *guid,
EFI_STATUS *status, const char * const file,
const int line, const char * const func)
{
if (mock_get_next_variable_name_post_hook)
mock_get_next_variable_name_post_hook(size, name, guid, status,
file, line, func);
}
#define mock_gnvn_post_hook(size, name, guid, status) \
mock_gnvn_post_hook_(size, name, guid, status,\
__FILE__, __LINE__, __func__)
static EFI_STATUS
mock_qvi_pre_hook(UINT32 attrs, UINT64 *max_var_storage,
UINT64 *remaining_var_storage, UINT64 *max_var_size)
{
EFI_STATUS status = EFI_SUCCESS;
if (mock_query_variable_info_pre_hook)
status = mock_query_variable_info_pre_hook(
attrs, max_var_storage,
remaining_var_storage, max_var_size);
return status;
}
static void
mock_qvi_post_hook_(UINT32 attrs, UINT64 *max_var_storage,
UINT64 *remaining_var_storage, UINT64 *max_var_size,
EFI_STATUS *status, const char * const file,
const int line, const char * const func)
{
if (mock_query_variable_info_post_hook)
mock_query_variable_info_post_hook(attrs, max_var_storage,
remaining_var_storage,
max_var_size, status,
file, line, func);
}
#define mock_qvi_post_hook(attrs, max_var_storage, remaining_var_storage,\
max_var_size, status) \
mock_qvi_post_hook_(attrs, max_var_storage, remaining_var_storage,\
max_var_size, status, \
__FILE__, __LINE__, __func__)
static const size_t guidstr_size = sizeof("8be4df61-93ca-11d2-aa0d-00e098032b8c");
static int
variable_limits_cmp(const struct mock_variable_limits * const v0,
const struct mock_variable_limits * const v1)
{
UINT32 mask = EFI_VARIABLE_NON_VOLATILE |
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS;
return (v0->attrs & mask) - (v1->attrs & mask);
}
static INT64
variable_cmp(const struct mock_variable * const v0,
const struct mock_variable * const v1)
{
INT64 ret;
if (v0 == NULL || v1 == NULL)
return (uintptr_t)v0 - (uintptr_t)v1;
ret = CompareGuid(&v0->guid, &v1->guid);
ret <<= 8ul;
#if (defined(SHIM_DEBUG) && SHIM_DEBUG > 3)
printf("%s:%d:%s(): "GUID_FMT" %s "GUID_FMT" (0x%011"PRIx64" %"PRId64")\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(v0->guid),
ret < 0 ? "<" : (ret > 0 ? ">" : "="),
GUID_ARGS(v1->guid),
(UINT64)ret & 0x1fffffffffful,
ret);
#endif
if (ret != 0) {
return ret;
}
ret = StrCmp(v0->name, v1->name);
#if (defined(SHIM_DEBUG) && SHIM_DEBUG > 3)
printf("%s:%d:%s(): \"%s\" %s \"%s\" (0x%02hhx (%d)\n",
__FILE__, __LINE__-1, __func__,
Str2str(v0->name),
ret < 0 ? "<" : (ret > 0 ? ">" : "=="),
Str2str(v1->name),
ret, ret);
#endif
return ret;
}
static char *
list2var(list_t *pos)
{
static char buf0[1024];
static char buf1[1024];
char *out;
static int n;
struct mock_variable *var;
out = n++ % 2 ? buf0 : buf1;
if (n > 1)
n -= 2;
SetMem(out, 1024, 0);
if (pos == &mock_variables) {
strcpy(out, "list tail");
return out;
}
var = list_entry(pos, struct mock_variable, list);
snprintf(out, 1023, GUID_FMT"-%s",
GUID_ARGS(var->guid),
Str2str(var->name));
return out;
}
EFI_STATUS EFIAPI
mock_get_variable(CHAR16 *name, EFI_GUID *guid, UINT32 *attrs, UINTN *size,
VOID *data)
{
list_t *pos = NULL;
struct mock_variable goal = {
.name = name,
.guid = *guid,
};
struct mock_variable *result = NULL;
EFI_STATUS status;
status = mock_gv_pre_hook(name, guid, attrs, size, data);
if (EFI_ERROR(status))
return status;
if (name == NULL || guid == NULL || size == NULL) {
status = EFI_INVALID_PARAMETER;
mock_gv_post_hook(name, guid, attrs, size, data, &status);
return status;
}
list_for_each(pos, &mock_variables) {
struct mock_variable *var;
var = list_entry(pos, struct mock_variable, list);
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s(): varcmp("GUID_FMT"-%s, "GUID_FMT"-%s)\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(goal.guid), Str2str(goal.name),
GUID_ARGS(var->guid), Str2str(var->name));
#endif
if (variable_cmp(&goal, var) == 0) {
if (attrs != NULL)
*attrs = var->attrs;
if (var->size > *size) {
*size = var->size;
status = EFI_BUFFER_TOO_SMALL;
mock_gv_post_hook(name, guid, attrs, size, data,
&status);
return status;
}
if (data == NULL) {
status = EFI_INVALID_PARAMETER;
mock_gv_post_hook(name, guid, attrs, size, data,
&status);
return status;
}
*size = var->size;
memcpy(data, var->data, var->size);
status = EFI_SUCCESS;
mock_gv_post_hook(name, guid, attrs, size, data,
&status);
return status;
}
}
status = EFI_NOT_FOUND;
mock_gv_post_hook(name, guid, attrs, size, data, &status);
return status;
}
static EFI_STATUS
mock_gnvn_set_result(UINTN *size, CHAR16 *name, EFI_GUID *guid,
struct mock_variable *result)
{
EFI_STATUS status;
if (*size < StrSize(result->name)) {
*size = StrSize(result->name);
status = EFI_BUFFER_TOO_SMALL;
mock_gnvn_post_hook(size, name, guid, &status);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 3
printf("%s:%d:%s(): returning %lx\n",
__FILE__, __LINE__-1, __func__, status);
#endif
return status;
}
*size = StrLen(result->name) + 1;
StrCpy(name, result->name);
memcpy(guid, &result->guid, sizeof(EFI_GUID));
status = EFI_SUCCESS;
mock_gnvn_post_hook(size, name, guid, &status);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 3
printf("%s:%d:%s(): returning %lx\n",
__FILE__, __LINE__-1, __func__, status);
#endif
return status;
}
EFI_STATUS EFIAPI
mock_get_next_variable_name(UINTN *size, CHAR16 *name, EFI_GUID *guid)
{
list_t *pos = NULL;
struct mock_variable goal = {
.name = name,
.guid = *guid,
};
struct mock_variable *result = NULL;
bool found = false;
EFI_STATUS status;
status = mock_gnvn_pre_hook(size, name, guid);
if (EFI_ERROR(status))
return status;
if (size == NULL || name == NULL || guid == NULL) {
status = EFI_INVALID_PARAMETER;
mock_gnvn_post_hook(size, name, guid, &status);
return status;
}
for (size_t i = 0; i < *size; i++) {
if (name[i] == 0) {
found = true;
break;
}
}
if (found == false) {
status = EFI_INVALID_PARAMETER;
mock_gnvn_post_hook(size, name, guid, &status);
return status;
}
found = false;
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():searching for "GUID_FMT"%s%s\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(*guid),
name[0] == 0 ? "" : "-",
name[0] == 0 ? "" : Str2str(name));
#endif
list_for_each(pos, &mock_variables) {
struct mock_variable *var;
var = list_entry(pos, struct mock_variable, list);
#if defined(SHIM_DEBUG)
# if SHIM_DEBUG > 1
printf("%s:%d:%s(): candidate var:%p &var->guid:%p &var->list:%p\n",
__FILE__, __LINE__-1, __func__, var, &var->guid, &var->list);
# elif SHIM_DEBUG > 0
printf("%s:%d:%s(): candidate var:%p var->guid:" GUID_FMT"\n",
__FILE__, __LINE__-1, __func__, var, GUID_ARGS(var->guid));
# endif
#endif
if (name[0] == 0) {
if (CompareGuid(&var->guid, guid) == 0) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s(): found guid in entry var:%p var->name:%p\n",
__FILE__, __LINE__-1, __func__, var, var->name);
#endif
result = var;
found = true;
break;
}
} else {
if (found) {
if (CompareGuid(&var->guid, guid) == 0) {
result = var;
break;
}
continue;
}
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): varcmp("GUID_FMT"-%s, "GUID_FMT"-%s)\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(goal.guid), Str2str(goal.name),
GUID_ARGS(var->guid), Str2str(var->name));
#endif
if (variable_cmp(&goal, var) == 0) {
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): found\n",
__FILE__, __LINE__-1, __func__);
#endif
found = true;
}
}
}
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
if (result) {
printf("%s:%d:%s(): found:%d result:%p &result->guid:%p &result->list:%p\n",
__FILE__, __LINE__-1, __func__, found, result,
&result->guid, &result->list);
printf("%s:%d:%s(): "GUID_FMT"-%s\n",
__FILE__, __LINE__-1, __func__, GUID_ARGS(result->guid),
Str2str(result->name));
} else {
printf("%s:%d:%s(): not found (found:%d status:0x%016x)\n",
__FILE__, __LINE__-1, __func__, found, status);
}
#endif
if (!found) {
if (name[0] == 0)
status = EFI_NOT_FOUND;
else
status = EFI_INVALID_PARAMETER;
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): not found (found:%d status:0x%016x)\n",
__FILE__, __LINE__-1, __func__, found, status);
#endif
mock_gnvn_post_hook(size, name, guid, &status);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): not found (found:%d status:0x%016x)\n",
__FILE__, __LINE__-1, __func__, found, status);
#endif
return status;
}
if (!result) {
status = EFI_NOT_FOUND;
mock_gnvn_post_hook(size, name, guid, &status);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): found (found:%d status:0x%016x)\n",
__FILE__, __LINE__-1, __func__, found, status);
#endif
return status;
}
return mock_gnvn_set_result(size, name, guid, result);
}
static void
free_var(struct mock_variable *var)
{
if (!var)
return;
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s(): var:%p &var->guid:%p ",
__FILE__, __LINE__-1, __func__,
var, var ? &var->guid : NULL);
if (var)
printf(GUID_FMT"-%s", GUID_ARGS(var->guid),
var->name ? Str2str(var->name) : "");
printf("\n");
#endif
list_del(&var->list);
if (var->size && var->data)
free(var->data);
SetMem(var, sizeof(*var), 0);
free(var);
}
static bool
mock_sv_attrs_match(UINT32 old, UINT32 new)
{
UINT32 mask = ~((UINT32)EFI_VARIABLE_APPEND_WRITE);
return (old & mask) == (new & mask);
}
static EFI_STATUS
mock_sv_adjust_usage_data(UINT32 attrs, size_t size, ssize_t change)
{
const UINT32 bs = EFI_VARIABLE_BOOTSERVICE_ACCESS;
const UINT32 bs_nv = bs | EFI_VARIABLE_NON_VOLATILE;
const UINT32 bs_rt = bs | EFI_VARIABLE_RUNTIME_ACCESS;
const UINT32 bs_rt_nv = bs_nv | bs_rt;
struct mock_variable_limits goal = {
.attrs = attrs & bs_rt_nv,
};
struct mock_variable_limits *qvi_limits = NULL;
struct mock_variable_limits *sv_limits = NULL;
list_t var, *pos = NULL;
UINT64 remaining;
list_for_each(pos, mock_qvi_limits) {
struct mock_variable_limits *candidate;
candidate = list_entry(pos, struct mock_variable_limits, list);
if (variable_limits_cmp(&goal, candidate) == 0) {
qvi_limits = candidate;
break;
}
}
list_for_each(pos, mock_sv_limits) {
struct mock_variable_limits *candidate;
candidate = list_entry(pos, struct mock_variable_limits, list);
if (variable_limits_cmp(&goal, candidate) == 0) {
sv_limits = candidate;
break;
}
}
if (!sv_limits) {
return EFI_UNSUPPORTED;
}
if (sv_limits->status != EFI_SUCCESS)
return sv_limits->status;
if (*sv_limits->max_var_size < size) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():*sv_limits->max_var_size:%zu size:%zu\n",
__FILE__, __LINE__, __func__,
*sv_limits->max_var_size, size);
#endif
return EFI_OUT_OF_RESOURCES;
}
if (change > 0 && (UINT64)change > *sv_limits->remaining_var_storage) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():*sv_limits->remaining_var_storage:%zu change:%zd\n",
__FILE__, __LINE__, __func__,
*sv_limits->remaining_var_storage, change);
#endif
return EFI_OUT_OF_RESOURCES;
}
*sv_limits->remaining_var_storage += change;
if (qvi_limits) {
/*
* If the adjustment here is wrong, we don't want to not do
* the set variable, we also don't want to not account
* for it, and of course we can't have any integer UB. So
* just limit it safely and move on, even though that may
* result in wrong checks against QueryVariableInfo() later.
*
* As if there are correct checks against QueryVariableInfo()...
*/
if (qvi_limits->remaining_var_storage == sv_limits->remaining_var_storage)
;
else if (change < 0 && (UINT64)-change > *qvi_limits->remaining_var_storage)
*qvi_limits->remaining_var_storage = 0;
else if (change > 0 && UINT64_MAX - *qvi_limits->remaining_var_storage < (UINT64)change)
*qvi_limits->remaining_var_storage = UINT64_MAX;
else
*qvi_limits->remaining_var_storage += change;
}
return EFI_SUCCESS;
}
static EFI_STATUS
mock_delete_variable(struct mock_variable *var)
{
EFI_STATUS status;
status = mock_sv_adjust_usage_data(var->attrs, 0, - var->size);
if (EFI_ERROR(status)) {
printf("%s:%d:%s(): status:0x%lx\n",
__FILE__, __LINE__ - 1, __func__, status);
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, DELETE);
return status;
}
status = EFI_SUCCESS;
mock_sv_post_hook(var->name, &var->guid, var->attrs, 0, 0, &status,
DELETE);
free_var(var);
return status;
}
static EFI_STATUS
mock_replace_variable(struct mock_variable *var, VOID *data, UINTN size)
{
EFI_STATUS status;
VOID *new;
status = mock_sv_adjust_usage_data(var->attrs, size,
- var->size + size);
if (EFI_ERROR(status)) {
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, REPLACE);
return status;
}
new = calloc(1, size);
if (!new) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():calloc(1, %zu) failed\n",
__FILE__, __LINE__, __func__,
size);
#endif
status = EFI_OUT_OF_RESOURCES;
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, REPLACE);
return status;
}
memcpy(new, data, size);
free(var->data);
var->data = new;
var->size = size;
status = EFI_SUCCESS;
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, REPLACE);
return status;
}
static EFI_STATUS
mock_sv_extend(struct mock_variable *var, VOID *data, UINTN size)
{
EFI_STATUS status;
uint8_t *new;
if (size == 0) {
status = EFI_SUCCESS;
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, APPEND);
return status;
}
status = mock_sv_adjust_usage_data(var->attrs, var->size + size, size);
if (EFI_ERROR(status)) {
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, APPEND);
return status;
}
new = realloc(var->data, var->size + size);
if (!new) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():realloc(%zu) failed\n",
__FILE__, __LINE__, __func__,
var->size + size);
#endif
status = EFI_OUT_OF_RESOURCES;
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, APPEND);
return status;
}
memcpy(&new[var->size], data, size);
var->data = (void *)new;
var->size += size;
status = EFI_SUCCESS;
mock_sv_post_hook(var->name, &var->guid, var->attrs, var->size,
var->data, &status, APPEND);
return status;
}
void
mock_print_var_list(list_t *head)
{
list_t *pos = NULL;
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s():variables so far:\n", __FILE__, __LINE__, __func__);
#endif
list_for_each(pos, head) {
struct mock_variable *var = NULL;
var = list_entry(pos, struct mock_variable, list);
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s(): "GUID_FMT"-%s (%lu bytes)\n",
__FILE__, __LINE__ - 1, __func__,
GUID_ARGS(var->guid), Str2str(var->name), var->size);
#endif
}
}
static EFI_STATUS
mock_new_variable(CHAR16 *name, EFI_GUID *guid, UINT32 attrs, UINTN size,
VOID *data, struct mock_variable **out)
{
EFI_STATUS status;
struct mock_variable *var;
uint8_t *buf;
if (size == 0) {
status = EFI_INVALID_PARAMETER;
return status;
}
status = EFI_OUT_OF_RESOURCES;
buf = calloc(1, sizeof(struct mock_variable) + StrSize(name));
if (!buf) {
#if (defined(SHIM_DEBUG) && SHIM_DEBUG != 0)
printf("%s:%d:%s(): calloc(1, %zu) failed\n",
__FILE__, __LINE__, __func__,
sizeof(struct mock_variable) + StrSize(name));
#endif
goto err;
}
var = (struct mock_variable *)buf;
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): var:%p &var->guid:%p &var->list:%p\n",
__FILE__, __LINE__-1, __func__, var, &var->guid, &var->list);
#endif
var->data = malloc(size);
if (!var->data)
goto err_free;
var->name = (CHAR16 *)&buf[sizeof(*var)];
StrCpy(var->name, name);
memcpy(&var->guid, guid, sizeof(EFI_GUID));
memcpy(var->data, data, size);
var->size = size;
var->attrs = attrs;
INIT_LIST_HEAD(&var->list);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): var: "GUID_FMT"-%s\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(var->guid), Str2str(var->name));
#endif
*out = var;
status = EFI_SUCCESS;
err_free:
if (EFI_ERROR(status))
free_var(var);
err:
return status;
}
EFI_STATUS EFIAPI
mock_set_variable(CHAR16 *name, EFI_GUID *guid, UINT32 attrs, UINTN size,
VOID *data)
{
list_t *pos = NULL, *tmp = NULL, *var_list = NULL;
struct mock_variable goal = {
.name = name,
.guid = *guid,
};
struct mock_variable *var = NULL;
bool found = false;
bool add_tail = true;
EFI_STATUS status;
long cmp = -1;
status = mock_sv_pre_hook(name, guid, attrs, size, data);
if (EFI_ERROR(status))
return status;
if (!name || name[0] == 0 || !guid) {
status = EFI_INVALID_PARAMETER;
mock_sv_post_hook(name, guid, attrs, size, data, &status,
CREATE);
return status;
}
if ((attrs & EFI_VARIABLE_RUNTIME_ACCESS) &&
!(attrs & EFI_VARIABLE_BOOTSERVICE_ACCESS)) {
status = EFI_INVALID_PARAMETER;
mock_sv_post_hook(name, guid, attrs, size, data, &status,
CREATE);
return status;
}
#if 0
/*
* We don't ever operate after ExitBootServices(), so I'm not
* checking for the missing EFI_VARIABLE_RUNTIME_ACCESS case
*/
if (has_exited_boot_services() && !(attrs & EFI_VARIABLE_RUNTIME_ACCESS)) {
status = EFI_INVALID_PARAMETER;
mock_sv_post_hook(name, guid, attrs, size, data, &status,
CREATE);
return status;
}
#endif
#if 0
/*
* For now, we're ignoring that we don't support these.
*/
if (attrs & (EFI_VARIABLE_HARDWARE_ERROR_RECORD |
EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS |
EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS |
EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS)) {
status = EFI_UNSUPPORTED;
mock_sv_post_hook(name, guid, attrs, size, data, &status,
CREATE);
return status;
}
#endif
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s():Setting "GUID_FMT"-%s size:0x%"PRIx64"\n",
__FILE__, __LINE__ - 1, __func__,
GUID_ARGS(*guid), Str2str(name), size);
#endif
switch (mock_variable_sort_policy) {
case MOCK_SORT_PREPEND:
var_list = &mock_variables;
add_tail = false;
break;
case MOCK_SORT_APPEND:
var_list = &mock_variables;
add_tail = true;
break;
case MOCK_SORT_DESCENDING:
add_tail = true;
break;
case MOCK_SORT_ASCENDING:
add_tail = true;
break;
default:
break;
}
pos = &mock_variables;
list_for_each_safe(pos, tmp, &mock_variables) {
found = false;
var = list_entry(pos, struct mock_variable, list);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s(): varcmp("GUID_FMT"-%s, "GUID_FMT"-%s)\n",
__FILE__, __LINE__-1, __func__,
GUID_ARGS(goal.guid), Str2str(goal.name),
GUID_ARGS(var->guid), Str2str(var->name));
#endif
cmp = variable_cmp(&goal, var);
cmp = cmp < 0 ? -1 : (cmp > 0 ? 1 : 0);
switch (mock_variable_sort_policy) {
case MOCK_SORT_DESCENDING:
if (cmp >= 0) {
var_list = pos;
found = true;
}
break;
case MOCK_SORT_ASCENDING:
if (cmp <= 0) {
var_list = pos;
found = true;
}
break;
default:
if (cmp == 0) {
var_list = pos;
found = true;
}
break;
}
if (found)
break;
}
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s():var_list:%p &mock_variables:%p cmp:%ld\n",
__FILE__, __LINE__ - 1, __func__,
var_list, &mock_variables, cmp);
#endif
if (cmp != 0 || (cmp == 0 && var_list == &mock_variables)) {
size_t totalsz = size + StrSize(name);
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 2
printf("%s:%d:%s():var:%p attrs:0x%lx\n",
__FILE__, __LINE__ - 1, __func__, var, attrs);
#endif
status = mock_sv_adjust_usage_data(attrs, size, -totalsz);
if (EFI_ERROR(status)) {
mock_sv_post_hook(name, guid, attrs, size, data,
&status, CREATE);
return status;
}
status = mock_new_variable(name, guid, attrs, size, data, &var);
mock_sv_post_hook(name, guid, attrs, size, data,
&status, CREATE);
if (EFI_ERROR(status)) {
mock_sv_adjust_usage_data(attrs, 0, totalsz);
return status;
}
#if defined(SHIM_DEBUG) && SHIM_DEBUG >= 1
printf("%s:%d:%s(): Adding "GUID_FMT"-%s %s %s\n",
__FILE__, __LINE__ - 1, __func__,
GUID_ARGS(var->guid), Str2str(var->name),
add_tail ? "after" : "before",
list2var(pos));
#endif
if (add_tail)
list_add_tail(&var->list, pos);
else
list_add(&var->list, pos);
return status;
}
var = list_entry(var_list, struct mock_variable, list);
#if defined(SHIM_DEBUG) && SHIM_DEBUG != 0
printf("%s:%d:%s():var:%p attrs:%s cmp:%ld size:%ld\n",
__FILE__, __LINE__ - 1, __func__,
var, format_var_attrs(var->attrs), cmp, size);
#endif
if (!mock_sv_attrs_match(var->attrs, attrs)) {
status = EFI_INVALID_PARAMETER;
if (size == 0 && !(attrs & EFI_VARIABLE_APPEND_WRITE)) {
if ((mock_variable_delete_attr_policy & MOCK_VAR_DELETE_ATTR_ALLOW_ZERO)
&& attrs == 0) {
status = EFI_SUCCESS;
} else if (mock_variable_delete_attr_policy & MOCK_VAR_DELETE_ATTR_ALOW_MISMATCH) {
status = EFI_SUCCESS;
}
}
if (EFI_ERROR(status)) {
printf("%s:%d:%s(): var->attrs:%s attrs:%s\n",
__FILE__, __LINE__ - 1, __func__,
format_var_attrs(var->attrs),
format_var_attrs(attrs));
mock_sv_post_hook(name, guid, attrs, size, data,
&status, REPLACE);
return status;
}
}
if (attrs & EFI_VARIABLE_APPEND_WRITE)
return mock_sv_extend(var, data, size);
if (size == 0) {
UINT32 mask = EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS
| EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS;
/*
* We can't process deletes on these correctly unless we
* parse the header.
*/
if (attrs & mask) {
return EFI_INVALID_PARAMETER;
}
return mock_delete_variable(var);
}
return mock_replace_variable(var, data, size);
}
EFI_STATUS EFIAPI
mock_query_variable_info(UINT32 attrs, UINT64 *max_var_storage,
UINT64 *remaining_var_storage, UINT64 *max_var_size)
{
list_t mvl, *pos = NULL;
struct mock_variable_limits goal = {
.attrs = attrs,
};
struct mock_variable_limits *limits = NULL;
EFI_STATUS status;
status = mock_qvi_pre_hook(attrs, max_var_storage,
remaining_var_storage, max_var_size);
if (EFI_ERROR(status))
return status;
if (max_var_storage == NULL ||
remaining_var_storage == NULL ||
max_var_size == NULL) {
status = EFI_INVALID_PARAMETER;
mock_qvi_post_hook(attrs, max_var_storage,
remaining_var_storage, max_var_size,
&status);
return status;
}
list_for_each(pos, mock_qvi_limits) {
limits = list_entry(pos, struct mock_variable_limits, list);
if (variable_limits_cmp(&goal, limits) == 0) {
*max_var_storage = *limits->max_var_storage;
*remaining_var_storage = *limits->remaining_var_storage;
*max_var_size = *limits->max_var_size;
status = EFI_SUCCESS;
mock_qvi_post_hook(attrs, max_var_storage,
remaining_var_storage, max_var_size,
&status);
return status;
}
}
status = EFI_UNSUPPORTED;
mock_qvi_post_hook(attrs, max_var_storage, remaining_var_storage,
max_var_size, &status);
return status;
}
static UINT64 default_max_var_storage;
static UINT64 default_remaining_var_storage;
static UINT64 default_max_var_size;
static struct mock_variable_limits default_limits[] = {
{.attrs = EFI_VARIABLE_BOOTSERVICE_ACCESS,
.max_var_storage = &default_max_var_storage,
.remaining_var_storage = &default_remaining_var_storage,
.max_var_size = &default_max_var_size,
.status = EFI_SUCCESS,
},
{.attrs = EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
.max_var_storage = &default_max_var_storage,
.remaining_var_storage = &default_remaining_var_storage,
.max_var_size = &default_max_var_size,