linux/fs/xfs/xfs_xattr.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2008 Christoph Hellwig.
 * Portions Copyright (C) 2000-2008 Silicon Graphics, Inc.
 */

#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_da_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_da_btree.h"
#include "xfs_attr.h"
#include "xfs_acl.h"
#include "xfs_log.h"
#include "xfs_xattr.h"
#include "xfs_quota.h"

#include <linux/posix_acl_xattr.h>

/*
 * Get permission to use log-assisted atomic exchange of file extents.
 * Callers must not be running any transactions or hold any ILOCKs.
 */
static inline int
xfs_attr_grab_log_assist(
	struct xfs_mount	*mp)
{ … }

static inline bool
xfs_attr_want_log_assist(
	struct xfs_mount	*mp)
{ … }

/*
 * Set or remove an xattr, having grabbed the appropriate logging resources
 * prior to calling libxfs.  Callers of this function are only required to
 * initialize the inode, attr_filter, name, namelen, value, and valuelen fields
 * of @args.
 */
int
xfs_attr_change(
	struct xfs_da_args	*args,
	enum xfs_attr_update	op)
{ … }


static int
xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
		struct inode *inode, const char *name, void *value, size_t size)
{ … }

static inline enum xfs_attr_update
xfs_xattr_flags_to_op(
	int		flags,
	const void	*value)
{ … }

static int
xfs_xattr_set(const struct xattr_handler *handler,
	      struct mnt_idmap *idmap, struct dentry *unused,
	      struct inode *inode, const char *name, const void *value,
	      size_t size, int flags)
{ … }

static const struct xattr_handler xfs_xattr_user_handler = …;

static const struct xattr_handler xfs_xattr_trusted_handler = …;

static const struct xattr_handler xfs_xattr_security_handler = …;

const struct xattr_handler * const xfs_xattr_handlers[] = …;

static void
__xfs_xattr_put_listent(
	struct xfs_attr_list_context *context,
	char *prefix,
	int prefix_len,
	unsigned char *name,
	int namelen)
{ … }

static void
xfs_xattr_put_listent(
	struct xfs_attr_list_context *context,
	int		flags,
	unsigned char	*name,
	int		namelen,
	void		*value,
	int		valuelen)
{ … }

ssize_t
xfs_vn_listxattr(
	struct dentry	*dentry,
	char		*data,
	size_t		size)
{ … }