LXR linux/fs/jfs/jfs

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 *   Copyright (C) International Business Machines Corp., 2000-2002
   4 */
   5
   6#ifndef H_JFS_XATTR
   7#define H_JFS_XATTR
   8
   9#include <linux/xattr.h>
  10
  11/*
  12 * jfs_ea_list describe the on-disk format of the extended attributes.
  13 * I know the null-terminator is redundant since namelen is stored, but
  14 * I am maintaining compatibility with OS/2 where possible.
  15 */
  16struct jfs_ea {
  17        u8 flag;        /* Unused? */
  18        u8 namelen;     /* Length of name */
  19        __le16 valuelen;        /* Length of value */
  20        char name[];    /* Attribute name (includes null-terminator) */
  21};                      /* Value immediately follows name */
  22
  23struct jfs_ea_list {
  24        __le32 size;            /* overall size */
  25        struct jfs_ea ea[];     /* Variable length list */
  26};
  27
  28/* Macros for defining maxiumum number of bytes supported for EAs */
  29#define MAXEASIZE       65535
  30#define MAXEALISTSIZE   MAXEASIZE
  31
  32/*
  33 * some macros for dealing with variable length EA lists.
  34 */
  35#define EA_SIZE(ea) \
  36        (sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
  37         le16_to_cpu((ea)->valuelen))
  38#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
  39#define FIRST_EA(ealist) ((ealist)->ea)
  40#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
  41#define END_EALIST(ealist) \
  42        ((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
  43
  44extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
  45                          size_t, int);
  46extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
  47extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
  48
  49extern const struct xattr_handler *jfs_xattr_handlers[];
  50
  51#ifdef CONFIG_JFS_SECURITY
  52extern int jfs_init_security(tid_t, struct inode *, struct inode *,
  53                             const struct qstr *);
  54#else
  55static inline int jfs_init_security(tid_t tid, struct inode *inode,
  56                                    struct inode *dir, const struct qstr *qstr)
  57{
  58        return 0;
  59}
  60#endif
  61
  62#endif  /* H_JFS_XATTR */
  63