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kernel/linux-imx6_3.14.28/fs/jfs/jfs_xattr.h 2.7 KB
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  /*
   *   Copyright (C) International Business Machines Corp., 2000-2002
   *
   *   This program is free software;  you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
   *   the GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program;  if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  
  #ifndef H_JFS_XATTR
  #define H_JFS_XATTR
  
  /*
   * jfs_ea_list describe the on-disk format of the extended attributes.
   * I know the null-terminator is redundant since namelen is stored, but
   * I am maintaining compatibility with OS/2 where possible.
   */
  struct jfs_ea {
  	u8 flag;	/* Unused? */
  	u8 namelen;	/* Length of name */
  	__le16 valuelen;	/* Length of value */
  	char name[0];	/* Attribute name (includes null-terminator) */
  };			/* Value immediately follows name */
  
  struct jfs_ea_list {
  	__le32 size;		/* overall size */
  	struct jfs_ea ea[0];	/* Variable length list */
  };
  
  /* Macros for defining maxiumum number of bytes supported for EAs */
  #define MAXEASIZE	65535
  #define MAXEALISTSIZE	MAXEASIZE
  
  /*
   * some macros for dealing with variable length EA lists.
   */
  #define EA_SIZE(ea) \
  	(sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
  	 le16_to_cpu((ea)->valuelen))
  #define	NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
  #define	FIRST_EA(ealist) ((ealist)->ea)
  #define	EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
  #define	END_EALIST(ealist) \
  	((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
  
  extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
  			  size_t, int);
  extern int jfs_setxattr(struct dentry *, const char *, const void *, size_t,
  			int);
  extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
  extern ssize_t jfs_getxattr(struct dentry *, const char *, void *, size_t);
  extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
  extern int jfs_removexattr(struct dentry *, const char *);
  
  extern const struct xattr_handler *jfs_xattr_handlers[];
  
  #ifdef CONFIG_JFS_SECURITY
  extern int jfs_init_security(tid_t, struct inode *, struct inode *,
  			     const struct qstr *);
  #else
  static inline int jfs_init_security(tid_t tid, struct inode *inode,
  				    struct inode *dir, const struct qstr *qstr)
  {
  	return 0;
  }
  #endif
  
  #endif	/* H_JFS_XATTR */