FreeBSD/Linux Kernel Cross Reference
sys/fs/jfs/jfs_xattr.h

     /*
      *   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 */
            u16 valuelen;   /* Length of value */
            char name[0];   /* Attribute name (includes null-terminator) */
    };                      /* Value immediately follows name */
    
    struct jfs_ea_list {
            u32 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(struct inode *, const char *, void *, size_t, int);
    extern int jfs_setxattr(struct dentry *, const char *, 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 *);
    
    #endif  /* H_JFS_XATTR */

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