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; 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 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