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Linux/fs/jfs/jfs_xattr.h

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  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[0];   /* 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[0];    /* 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 */
 63 

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