Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) // error-inject.c: Function-level error injection table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/error-injection.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) #include <linux/kallsyms.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/kprobes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /* Whitelist of symbols that can be overridden for error injection. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) static LIST_HEAD(error_injection_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) static DEFINE_MUTEX(ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) struct ei_entry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 	struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	unsigned long start_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	unsigned long end_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	int etype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	void *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) bool within_error_injection_list(unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct ei_entry *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	bool ret = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	mutex_lock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	list_for_each_entry(ent, &error_injection_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		if (addr >= ent->start_addr && addr < ent->end_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 			ret = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	mutex_unlock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) int get_injectable_error_type(unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct ei_entry *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	list_for_each_entry(ent, &error_injection_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		if (addr >= ent->start_addr && addr < ent->end_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 			return ent->etype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return EI_ETYPE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * Lookup and populate the error_injection_list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * For safety reasons we only allow certain functions to be overridden with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * bpf_error_injection, so we need to populate the list of the symbols that have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * been marked as safe for overriding.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static void populate_error_injection_list(struct error_injection_entry *start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 					  struct error_injection_entry *end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 					  void *priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct error_injection_entry *iter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	struct ei_entry *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	unsigned long entry, offset = 0, size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	mutex_lock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	for (iter = start; iter < end; iter++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		entry = arch_deref_entry_point((void *)iter->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (!kernel_text_address(entry) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		    !kallsyms_lookup_size_offset(entry, &size, &offset)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			pr_err("Failed to find error inject entry at %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 				(void *)entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		ent = kmalloc(sizeof(*ent), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		if (!ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		ent->start_addr = entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		ent->end_addr = entry + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		ent->etype = iter->etype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		ent->priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		INIT_LIST_HEAD(&ent->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		list_add_tail(&ent->list, &error_injection_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	mutex_unlock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) /* Markers of the _error_inject_whitelist section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) extern struct error_injection_entry __start_error_injection_whitelist[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) extern struct error_injection_entry __stop_error_injection_whitelist[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static void __init populate_kernel_ei_list(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	populate_error_injection_list(__start_error_injection_whitelist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 				      __stop_error_injection_whitelist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 				      NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #ifdef CONFIG_MODULES
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static void module_load_ei_list(struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (!mod->num_ei_funcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	populate_error_injection_list(mod->ei_funcs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 				      mod->ei_funcs + mod->num_ei_funcs, mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static void module_unload_ei_list(struct module *mod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	struct ei_entry *ent, *n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (!mod->num_ei_funcs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	mutex_lock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	list_for_each_entry_safe(ent, n, &error_injection_list, list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		if (ent->priv == mod) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			list_del_init(&ent->list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			kfree(ent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	mutex_unlock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* Module notifier call back, checking error injection table on the module */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static int ei_module_callback(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			      unsigned long val, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct module *mod = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	if (val == MODULE_STATE_COMING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		module_load_ei_list(mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	else if (val == MODULE_STATE_GOING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		module_unload_ei_list(mod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static struct notifier_block ei_module_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	.notifier_call = ei_module_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	.priority = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static __init int module_ei_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return register_module_notifier(&ei_module_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #else /* !CONFIG_MODULES */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #define module_ei_init()	(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)  * error_injection/whitelist -- shows which functions can be overridden for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  * error injection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) static void *ei_seq_start(struct seq_file *m, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	mutex_lock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return seq_list_start(&error_injection_list, *pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static void ei_seq_stop(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	mutex_unlock(&ei_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void *ei_seq_next(struct seq_file *m, void *v, loff_t *pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	return seq_list_next(v, &error_injection_list, pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static const char *error_type_string(int etype)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	switch (etype) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	case EI_ETYPE_NULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		return "NULL";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	case EI_ETYPE_ERRNO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		return "ERRNO";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	case EI_ETYPE_ERRNO_NULL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		return "ERRNO_NULL";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		return "(unknown)";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static int ei_seq_show(struct seq_file *m, void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	struct ei_entry *ent = list_entry(v, struct ei_entry, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	seq_printf(m, "%ps\t%s\n", (void *)ent->start_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		   error_type_string(ent->etype));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static const struct seq_operations ei_seq_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	.start = ei_seq_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	.next  = ei_seq_next,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	.stop  = ei_seq_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	.show  = ei_seq_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) static int ei_open(struct inode *inode, struct file *filp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	return seq_open(filp, &ei_seq_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) static const struct file_operations debugfs_ei_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	.open           = ei_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.read           = seq_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.llseek         = seq_lseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	.release        = seq_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int __init ei_debugfs_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	struct dentry *dir, *file;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	dir = debugfs_create_dir("error_injection", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (!dir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	file = debugfs_create_file("list", 0444, dir, NULL, &debugfs_ei_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (!file) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		debugfs_remove(dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) static int __init init_error_injection(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	populate_kernel_ei_list();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (!module_ei_init())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		ei_debugfs_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) late_initcall(init_error_injection);