text: #include "reiserfs.h"
  #include <linux/capability.h>
  #include <linux/errno.h>
  #include <linux/fs.h>
  #include <linux/pagemap.h>
  #include <linux/xattr.h>
  #include "xattr.h"
  #include <linux/uaccess.h>
  
  static int
  trusted_get(const struct xattr_handler *handler, struct dentry *dentry,
  	    const char *name, void *buffer, size_t size)
  {
  	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
  		return -EINVAL;
  
  	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
  		return -EPERM;
  
  	return reiserfs_xattr_get(d_inode(dentry), name, buffer, size);
  }
  
  static int
  trusted_set(const struct xattr_handler *handler, struct dentry *dentry,
  	    const char *name, const void *buffer, size_t size, int flags)
  {
  	if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
  		return -EINVAL;
  
  	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
  		return -EPERM;
  
  	return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
  }
  
  static size_t trusted_list(const struct xattr_handler *handler,
  			   struct dentry *dentry, char *list, size_t list_size,
  			   const char *name, size_t name_len)
  {
  	const size_t len = name_len + 1;
  
  	if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
  		return 0;
  
  	if (list && len <= list_size) {
  		memcpy(list, name, name_len);
  		list[name_len] = '\0';
  	}
  	return len;
  }
  
  const struct xattr_handler reiserfs_xattr_trusted_handler = {
  	.prefix = XATTR_TRUSTED_PREFIX,
  	.get = trusted_get,
  	.set = trusted_set,
  	.list = trusted_list,
  };
  