1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/types.h>
4#include <linux/kconfig.h>
5#include <linux/list.h>
6#include <linux/slab.h>
7#include <linux/export.h>
8#include <linux/security.h>
9#include <linux/highmem.h>
10#include <linux/umh.h>
11#include <linux/sysctl.h>
12
13#include "fallback.h"
14#include "firmware.h"
15
16/*
17 * firmware fallback configuration table
18 */
19
20struct firmware_fallback_config fw_fallback_config = {
21 .force_sysfs_fallback = IS_ENABLED(CONFIG_FW_LOADER_USER_HELPER_FALLBACK),
22 .loading_timeout = 60,
23 .old_timeout = 60,
24};
25EXPORT_SYMBOL_NS_GPL(fw_fallback_config, "FIRMWARE_LOADER_PRIVATE");
26
27#ifdef CONFIG_SYSCTL
28static const struct ctl_table firmware_config_table[] = {
29 {
30 .procname = "force_sysfs_fallback",
31 .data = &fw_fallback_config.force_sysfs_fallback,
32 .maxlen = sizeof(unsigned int),
33 .mode = 0644,
34 .proc_handler = proc_douintvec_minmax,
35 .extra1 = SYSCTL_ZERO,
36 .extra2 = SYSCTL_ONE,
37 },
38 {
39 .procname = "ignore_sysfs_fallback",
40 .data = &fw_fallback_config.ignore_sysfs_fallback,
41 .maxlen = sizeof(unsigned int),
42 .mode = 0644,
43 .proc_handler = proc_douintvec_minmax,
44 .extra1 = SYSCTL_ZERO,
45 .extra2 = SYSCTL_ONE,
46 },
47};
48
49static struct ctl_table_header *firmware_config_sysct_table_header;
50int register_firmware_config_sysctl(void)
51{
52 firmware_config_sysct_table_header =
53 register_sysctl("kernel/firmware_config",
54 firmware_config_table);
55 if (!firmware_config_sysct_table_header)
56 return -ENOMEM;
57 return 0;
58}
59EXPORT_SYMBOL_NS_GPL(register_firmware_config_sysctl, "FIRMWARE_LOADER_PRIVATE");
60
61void unregister_firmware_config_sysctl(void)
62{
63 unregister_sysctl_table(table: firmware_config_sysct_table_header);
64 firmware_config_sysct_table_header = NULL;
65}
66EXPORT_SYMBOL_NS_GPL(unregister_firmware_config_sysctl, "FIRMWARE_LOADER_PRIVATE");
67
68#endif /* CONFIG_SYSCTL */
69

source code of linux/drivers/base/firmware_loader/fallback_table.c