fs/ext2/xattr_user.c

   1 /*
   2  * linux/fs/ext2/xattr_user.c
   3  * Handler for extended user attributes.
   4  *
   5  * Copyright (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/string.h>
  10 #include "ext2.h"
  11 #include "xattr.h"
  12
  13 static bool
  14 ext2_xattr_user_list(struct dentry *dentry)
  15 {
  16         return test_opt(dentry->d_sb, XATTR_USER);
  17 }
  18
  19 static int
  20 ext2_xattr_user_get(const struct xattr_handler *handler,
  21                     struct dentry *dentry, const char *name,
  22                     void *buffer, size_t size)
  23 {
  24         if (!test_opt(dentry->d_sb, XATTR_USER))
  25                 return -EOPNOTSUPP;
  26         return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_USER,
  27                               name, buffer, size);
  28 }
  29
  30 static int
  31 ext2_xattr_user_set(const struct xattr_handler *handler,
  32                     struct dentry *dentry, const char *name,
  33                     const void *value, size_t size, int flags)
  34 {
  35         if (!test_opt(dentry->d_sb, XATTR_USER))
  36                 return -EOPNOTSUPP;
  37
  38         return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_USER,
  39                               name, value, size, flags);
  40 }
  41
  42 const struct xattr_handler ext2_xattr_user_handler = {
  43         .prefix = XATTR_USER_PREFIX,
  44         .list   = ext2_xattr_user_list,
  45         .get    = ext2_xattr_user_get,
  46         .set    = ext2_xattr_user_set,
  47 };