#include <linux/fault-inject.h>#include <linux/slab.h> static struct {	struct fault_attr attr;	u32 ignore_gfp_wait;	int cache_filter;} failslab = {	.attr = FAULT_ATTR_INITIALIZER,	.ignore_gfp_wait = 1,	.cache_filter = 0,}; bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags){	if (gfpflags & __GFP_NOFAIL)		return false;         if (failslab.ignore_gfp_wait && (gfpflags & __GFP_WAIT))		return false; 	if (failslab.cache_filter && !(cache_flags & SLAB_FAILSLAB))		return false; 	return should_fail(&failslab.attr, size);} static int __init setup_failslab(char *str){	return setup_fault_attr(&failslab.attr, str);}__setup("failslab=", setup_failslab); #ifdef CONFIG_FAULT_INJECTION_DEBUG_FSstatic int __init failslab_debugfs_init(void){	struct dentry *dir;	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR; 	dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);	if (IS_ERR(dir))		return PTR_ERR(dir); 	if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,				&failslab.ignore_gfp_wait))		goto fail;	if (!debugfs_create_bool("cache-filter", mode, dir,				&failslab.cache_filter))		goto fail; 	return 0;fail:	debugfs_remove_recursive(dir); 	return -ENOMEM;} late_initcall(failslab_debugfs_init); #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */