LXR linux/fs/ext4/xattr

   1/*
   2 * linux/fs/ext4/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/string.h>
   9#include <linux/fs.h>
  10#include "ext4_jbd2.h"
  11#include "ext4.h"
  12#include "xattr.h"
  13
  14static bool
  15ext4_xattr_user_list(struct dentry *dentry)
  16{
  17        return test_opt(dentry->d_sb, XATTR_USER);
  18}
  19
  20static int
  21ext4_xattr_user_get(const struct xattr_handler *handler,
  22                    struct dentry *unused, struct inode *inode,
  23                    const char *name, void *buffer, size_t size)
  24{
  25        if (!test_opt(inode->i_sb, XATTR_USER))
  26                return -EOPNOTSUPP;
  27        return ext4_xattr_get(inode, EXT4_XATTR_INDEX_USER,
  28                              name, buffer, size);
  29}
  30
  31static int
  32ext4_xattr_user_set(const struct xattr_handler *handler,
  33                    struct dentry *unused, struct inode *inode,
  34                    const char *name, const void *value,
  35                    size_t size, int flags)
  36{
  37        if (!test_opt(inode->i_sb, XATTR_USER))
  38                return -EOPNOTSUPP;
  39        return ext4_xattr_set(inode, EXT4_XATTR_INDEX_USER,
  40                              name, value, size, flags);
  41}
  42
  43const struct xattr_handler ext4_xattr_user_handler = {
  44        .prefix = XATTR_USER_PREFIX,
  45        .list   = ext4_xattr_user_list,
  46        .get    = ext4_xattr_user_get,
  47        .set    = ext4_xattr_user_set,
  48};
  49