linux/fs/cachefiles/xattr.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* CacheFiles extended attribute management
 *
 * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/fsnotify.h>
#include <linux/quotaops.h>
#include <linux/xattr.h>
#include <linux/slab.h>
#include "internal.h"

#define CACHEFILES_COOKIE_TYPE_DATA …

struct cachefiles_xattr { … } __packed;

static const char cachefiles_xattr_cache[] = …;

struct cachefiles_vol_xattr { … } __packed;

/*
 * set the state xattr on a cache file
 */
int cachefiles_set_object_xattr(struct cachefiles_object *object)
{ … }

/*
 * check the consistency between the backing cache and the FS-Cache cookie
 */
int cachefiles_check_auxdata(struct cachefiles_object *object, struct file *file)
{ … }

/*
 * remove the object's xattr to mark it stale
 */
int cachefiles_remove_object_xattr(struct cachefiles_cache *cache,
				   struct cachefiles_object *object,
				   struct dentry *dentry)
{ … }

/*
 * Stick a marker on the cache object to indicate that it's dirty.
 */
void cachefiles_prepare_to_write(struct fscache_cookie *cookie)
{ … }

/*
 * Set the state xattr on a volume directory.
 */
bool cachefiles_set_volume_xattr(struct cachefiles_volume *volume)
{ … }

/*
 * Check the consistency between the backing cache and the volume cookie.
 */
int cachefiles_check_volume_xattr(struct cachefiles_volume *volume)
{ … }