linux/fs/afs/xattr.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* Extended attribute handling for AFS.  We use xattrs to get and set metadata
 * instead of providing pioctl().
 *
 * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/xattr.h>
#include "internal.h"

/*
 * Deal with the result of a successful fetch ACL operation.
 */
static void afs_acl_success(struct afs_operation *op)
{ … }

static void afs_acl_put(struct afs_operation *op)
{ … }

static const struct afs_operation_ops afs_fetch_acl_operation = …;

/*
 * Get a file's ACL.
 */
static int afs_xattr_get_acl(const struct xattr_handler *handler,
			     struct dentry *dentry,
			     struct inode *inode, const char *name,
			     void *buffer, size_t size)
{ … }

static bool afs_make_acl(struct afs_operation *op,
			 const void *buffer, size_t size)
{ … }

static const struct afs_operation_ops afs_store_acl_operation = …;

/*
 * Set a file's AFS3 ACL.
 */
static int afs_xattr_set_acl(const struct xattr_handler *handler,
			     struct mnt_idmap *idmap,
                             struct dentry *dentry,
                             struct inode *inode, const char *name,
                             const void *buffer, size_t size, int flags)
{ … }

static const struct xattr_handler afs_xattr_afs_acl_handler = …;

static const struct afs_operation_ops yfs_fetch_opaque_acl_operation = …;

/*
 * Get a file's YFS ACL.
 */
static int afs_xattr_get_yfs(const struct xattr_handler *handler,
			     struct dentry *dentry,
			     struct inode *inode, const char *name,
			     void *buffer, size_t size)
{ … }

static const struct afs_operation_ops yfs_store_opaque_acl2_operation = …;

/*
 * Set a file's YFS ACL.
 */
static int afs_xattr_set_yfs(const struct xattr_handler *handler,
			     struct mnt_idmap *idmap,
                             struct dentry *dentry,
                             struct inode *inode, const char *name,
                             const void *buffer, size_t size, int flags)
{ … }

static const struct xattr_handler afs_xattr_yfs_handler = …;

/*
 * Get the name of the cell on which a file resides.
 */
static int afs_xattr_get_cell(const struct xattr_handler *handler,
			      struct dentry *dentry,
			      struct inode *inode, const char *name,
			      void *buffer, size_t size)
{ … }

static const struct xattr_handler afs_xattr_afs_cell_handler = …;

/*
 * Get the volume ID, vnode ID and vnode uniquifier of a file as a sequence of
 * hex numbers separated by colons.
 */
static int afs_xattr_get_fid(const struct xattr_handler *handler,
			     struct dentry *dentry,
			     struct inode *inode, const char *name,
			     void *buffer, size_t size)
{ … }

static const struct xattr_handler afs_xattr_afs_fid_handler = …;

/*
 * Get the name of the volume on which a file resides.
 */
static int afs_xattr_get_volume(const struct xattr_handler *handler,
			      struct dentry *dentry,
			      struct inode *inode, const char *name,
			      void *buffer, size_t size)
{ … }

static const struct xattr_handler afs_xattr_afs_volume_handler = …;

const struct xattr_handler * const afs_xattr_handlers[] = …;