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
20 struct 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 };
25 EXPORT_SYMBOL_NS_GPL(fw_fallback_config, FIRMWARE_LOADER_PRIVATE);
26
27 #ifdef CONFIG_SYSCTL
28 static 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 };
49
50 static struct ctl_table_header *firmware_config_sysct_table_header;
register_firmware_config_sysctl(void)51 int register_firmware_config_sysctl(void)
52 {
53 firmware_config_sysct_table_header =
54 register_sysctl("kernel/firmware_config",
55 firmware_config_table);
56 if (!firmware_config_sysct_table_header)
57 return -ENOMEM;
58 return 0;
59 }
60 EXPORT_SYMBOL_NS_GPL(register_firmware_config_sysctl, FIRMWARE_LOADER_PRIVATE);
61
unregister_firmware_config_sysctl(void)62 void unregister_firmware_config_sysctl(void)
63 {
64 unregister_sysctl_table(firmware_config_sysct_table_header);
65 firmware_config_sysct_table_header = NULL;
66 }
67 EXPORT_SYMBOL_NS_GPL(unregister_firmware_config_sysctl, FIRMWARE_LOADER_PRIVATE);
68
69 #endif /* CONFIG_SYSCTL */
70