C++ (Cpp) fscache_proc_init Examples

Example #1

/*
 * initialise the fs caching module
 */
static int __init fscache_init(void)
{
	int ret;

	mark_tech_preview(NULL, THIS_MODULE);

	ret = slow_work_register_user(THIS_MODULE);
	if (ret < 0)
		goto error_slow_work;

	ret = fscache_proc_init();
	if (ret < 0)
		goto error_proc;

	fscache_cookie_jar = kmem_cache_create("fscache_cookie_jar",
					       sizeof(struct fscache_cookie),
					       0,
					       0,
					       fscache_cookie_init_once);
	if (!fscache_cookie_jar) {
		printk(KERN_NOTICE
		       "FS-Cache: Failed to allocate a cookie jar\n");
		ret = -ENOMEM;
		goto error_cookie_jar;
	}

	fscache_root = kobject_create_and_add("fscache", kernel_kobj);
	if (!fscache_root)
		goto error_kobj;

	printk(KERN_NOTICE "FS-Cache: Loaded\n");
	return 0;

error_kobj:
	kmem_cache_destroy(fscache_cookie_jar);
error_cookie_jar:
	fscache_proc_cleanup();
error_proc:
	slow_work_unregister_user(THIS_MODULE);
error_slow_work:
	return ret;
}

Example #2

File: main.c Project: 7799/linux

/*
 * initialise the fs caching module
 */
static int __init fscache_init(void)
{
	unsigned int nr_cpus = num_possible_cpus();
	unsigned int cpu;
	int ret;

	fscache_object_max_active =
		clamp_val(nr_cpus,
			  fscache_object_max_active, WQ_UNBOUND_MAX_ACTIVE);

	ret = -ENOMEM;
	fscache_object_wq = alloc_workqueue("fscache_object", WQ_UNBOUND,
					    fscache_object_max_active);
	if (!fscache_object_wq)
		goto error_object_wq;

	fscache_op_max_active =
		clamp_val(fscache_object_max_active / 2,
			  fscache_op_max_active, WQ_UNBOUND_MAX_ACTIVE);

	ret = -ENOMEM;
	fscache_op_wq = alloc_workqueue("fscache_operation", WQ_UNBOUND,
					fscache_op_max_active);
	if (!fscache_op_wq)
		goto error_op_wq;

	for_each_possible_cpu(cpu)
		init_waitqueue_head(&per_cpu(fscache_object_cong_wait, cpu));

	ret = fscache_proc_init();
	if (ret < 0)
		goto error_proc;

#ifdef CONFIG_SYSCTL
	ret = -ENOMEM;
	fscache_sysctl_header = register_sysctl_table(fscache_sysctls_root);
	if (!fscache_sysctl_header)
		goto error_sysctl;
#endif

	fscache_cookie_jar = kmem_cache_create("fscache_cookie_jar",
					       sizeof(struct fscache_cookie),
					       0,
					       0,
					       fscache_cookie_init_once);
	if (!fscache_cookie_jar) {
		printk(KERN_NOTICE
		       "FS-Cache: Failed to allocate a cookie jar\n");
		ret = -ENOMEM;
		goto error_cookie_jar;
	}

	fscache_root = kobject_create_and_add("fscache", kernel_kobj);
	if (!fscache_root)
		goto error_kobj;

	printk(KERN_NOTICE "FS-Cache: Loaded\n");
	return 0;

error_kobj:
	kmem_cache_destroy(fscache_cookie_jar);
error_cookie_jar:
#ifdef CONFIG_SYSCTL
	unregister_sysctl_table(fscache_sysctl_header);
error_sysctl:
#endif
	fscache_proc_cleanup();
error_proc:
	destroy_workqueue(fscache_op_wq);
error_op_wq:
	destroy_workqueue(fscache_object_wq);
error_object_wq:
	return ret;
}