cregit-Linux how code gets into the kernel

Release 4.11 fs/cachefiles/main.c

Directory: fs/cachefiles
/* Network filesystem caching backend to use cache files on a premounted
 * filesystem
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/statfs.h>
#include <linux/sysctl.h>
#include <linux/miscdevice.h>
#include "internal.h"


unsigned cachefiles_debug;
module_param_named(debug, cachefiles_debug, uint, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(cachefiles_debug, "CacheFiles debugging mask");

MODULE_DESCRIPTION("Mounted-filesystem based cache");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");


struct kmem_cache *cachefiles_object_jar;


static struct miscdevice cachefiles_dev = {
	.minor	= MISC_DYNAMIC_MINOR,
	.name	= "cachefiles",
	.fops	= &cachefiles_daemon_fops,
};


static void cachefiles_object_init_once(void *_object) { struct cachefiles_object *object = _object; memset(object, 0, sizeof(*object)); spin_lock_init(&object->work_lock); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells38100.00%1100.00%
Total38100.00%1100.00%

/* * initialise the fs caching module */
static int __init cachefiles_init(void) { int ret; ret = misc_register(&cachefiles_dev); if (ret < 0) goto error_dev; /* create an object jar */ ret = -ENOMEM; cachefiles_object_jar = kmem_cache_create("cachefiles_object_jar", sizeof(struct cachefiles_object), 0, SLAB_HWCACHE_ALIGN, cachefiles_object_init_once); if (!cachefiles_object_jar) { pr_notice("Failed to allocate an object jar\n"); goto error_object_jar; } ret = cachefiles_proc_init(); if (ret < 0) goto error_proc; pr_info("Loaded\n"); return 0; error_proc: kmem_cache_destroy(cachefiles_object_jar); error_object_jar: misc_deregister(&cachefiles_dev); error_dev: pr_err("failed to register: %d\n", ret); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
David Howells11294.92%125.00%
Fabian Frederick65.08%375.00%
Total118100.00%4100.00%

fs_initcall(cachefiles_init); /* * clean up on module removal */
static void __exit cachefiles_exit(void) { pr_info("Unloading\n"); cachefiles_proc_cleanup(); kmem_cache_destroy(cachefiles_object_jar); misc_deregister(&cachefiles_dev); }

Contributors

PersonTokensPropCommitsCommitProp
David Howells2692.86%133.33%
Fabian Frederick27.14%266.67%
Total28100.00%3100.00%

module_exit(cachefiles_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
David Howells29497.35%125.00%
Fabian Frederick82.65%375.00%
Total302100.00%4100.00%
Directory: fs/cachefiles
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