fs/jfs/jfs_xattr.h

   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  */
  16 struct 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
  23 struct 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
  44 extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
  45                           size_t, int);
  46 extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
  47 extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
  48
  49 extern const struct xattr_handler *jfs_xattr_handlers[];
  50
  51 #ifdef CONFIG_JFS_SECURITY
  52 extern int jfs_init_security(tid_t, struct inode *, struct inode *,
  53                              const struct qstr *);
  54 #else
  55 static 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 */