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Parent pointer userspace support. Adds in libhandle code and xfs_io parent command support.
Merge of master-melb:xfs-cmds:24394a by kenmcd.

  Add getparents handle functions.

/*
 * Copyright (c) 1995, 2001-2003, 2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __HANDLE_H__
#define __HANDLE_H__

#ifdef __cplusplus
extern "C" {
#endif

struct fsdmidata;
struct attrlist_cursor;
struct parent_cursor;
struct parent;

extern int  path_to_handle (char *__path, void **__hanp, size_t *__hlen);
extern int  path_to_fshandle (char *__path, void **__fshanp, size_t *__fshlen);
extern int  handle_to_fshandle (void *__hanp, size_t __hlen, void **__fshanp,
				size_t *__fshlen);
extern void free_handle (void *__hanp, size_t __hlen);
extern int  open_by_fshandle (void *__fshanp, size_t __fshlen, int __rw);
extern int  open_by_handle (void *__hanp, size_t __hlen, int __rw);
extern int  readlink_by_handle (void *__hanp, size_t __hlen, void *__buf,
				size_t __bs);
extern int  attr_multi_by_handle (void *__hanp, size_t __hlen, void *__buf,
				  int __rtrvcnt, int __flags);
extern int  attr_list_by_handle (void *__hanp, size_t __hlen, void *__buf,
				 size_t __bufsize, int __flags,
				 struct attrlist_cursor *__cursor);
extern int  getparents_by_handle(void *__hanp, size_t __hlen,
				 struct parent *__buf, size_t __bufsize,
				 struct parent_cursor *__cursor,
				 unsigned int *__count, unsigned int *__more);
extern int  getparentpaths_by_handle(void *__hanp, size_t __hlen,
				     struct parent *__buf, size_t __bufsize,
				     struct parent_cursor *__cursor,
				     unsigned int *__count, unsigned int *__more);
extern int  fssetdm_by_handle (void *__hanp, size_t __hlen,
			       struct fsdmidata *__fsdmi);

#ifdef __cplusplus
}
#endif

#endif	/* __HANDLE_H__ */