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/*
  Copyright (c) 2006-2009 Z RESEARCH, Inc. <http://www.zresearch.com>
  This file is part of GlusterFS.

  GlusterFS 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 3 of the License,
  or (at your option) any later version.

  GlusterFS 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, see
  <http://www.gnu.org/licenses/>.
*/

#ifndef _XLATOR_H
#define _XLATOR_H

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include <stdio.h>
#include <stdint.h>
#include <inttypes.h>


#include "glusterfs.h"
#include "logging.h"
#include "common-utils.h"
#include "dict.h"
#include "compat.h"
#include "list.h"

#define FIRST_CHILD(xl) (xl->children->xlator)

struct _xlator;
typedef struct _xlator xlator_t;
struct _dir_entry_t;
typedef struct _dir_entry_t dir_entry_t;
struct _gf_dirent_t;
typedef struct _gf_dirent_t gf_dirent_t;
struct _loc;
typedef struct _loc loc_t;


typedef int32_t (*event_notify_fn_t) (xlator_t *this,
				      int32_t event,
				      void *data,
				      ...);

#include "list.h"
#include "gf-dirent.h"
#include "stack.h"
#include "inode.h"
#include "fd.h"

struct _loc {
	const char *path;
	const char *name;
	ino_t       ino;
	inode_t    *inode;
	inode_t    *parent;
};


struct xlator_stats {
	uint64_t nr_files;         /* Number of files open via this xlator */
	uint64_t free_disk;        /* Mega bytes */
	uint64_t total_disk_size;  /* Mega Bytes */
	uint64_t disk_usage;       /* Mega bytes */
	uint64_t disk_speed;       /* MHz or Mbps */
	uint64_t nr_clients;       /* Number of client nodes */
	uint64_t write_usage;
	uint64_t read_usage;       /* add more stats here */
};



typedef int32_t (*mop_stats_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    struct xlator_stats *stats);

typedef int32_t (*mop_getspec_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      char *spec_data);

typedef int32_t (*fop_checksum_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       uint8_t *file_checksum,
				       uint8_t *dir_checksum);

typedef int32_t (*mop_setvolume_t) (call_frame_t *frame,
				    xlator_t *this,
				    const char *volume);

typedef int32_t (*mop_stats_t) (call_frame_t *frame,
				xlator_t *this,
				int32_t flags);

typedef int32_t (*mop_getspec_t) (call_frame_t *frame,
				  xlator_t *this,
				  const char *key,
				  int32_t flag);

typedef int32_t (*fop_checksum_t) (call_frame_t *frame,
				   xlator_t *this,
				   loc_t *loc,
				   int32_t flag);

struct xlator_mops {
	mop_stats_t            stats;
	mop_getspec_t          getspec;

	mop_stats_cbk_t        stats_cbk;
	mop_getspec_cbk_t      getspec_cbk;
};


typedef int32_t (*fop_lookup_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     inode_t *inode,
				     struct stat *buf,
				     dict_t *xattr);

typedef int32_t (*fop_stat_cbk_t) (call_frame_t *frame,
				   void *cookie,
				   xlator_t *this,
				   int32_t op_ret,
				   int32_t op_errno,
				   struct stat *buf);

typedef int32_t (*fop_fstat_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    struct stat *buf);

typedef int32_t (*fop_chmod_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    struct stat *buf);

typedef int32_t (*fop_fchmod_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     struct stat *buf);

typedef int32_t (*fop_chown_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    struct stat *buf);

typedef int32_t (*fop_fchown_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     struct stat *buf);

typedef int32_t (*fop_truncate_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       struct stat *buf);

typedef int32_t (*fop_ftruncate_cbk_t) (call_frame_t *frame,
					void *cookie,
					xlator_t *this,
					int32_t op_ret,
					int32_t op_errno,
					struct stat *buf);

typedef int32_t (*fop_utimens_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      struct stat *buf);

typedef int32_t (*fop_access_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno);

typedef int32_t (*fop_readlink_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       const char *path);

typedef int32_t (*fop_mknod_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    inode_t *inode,
				    struct stat *buf);

typedef int32_t (*fop_mkdir_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    inode_t *inode,
				    struct stat *buf);

typedef int32_t (*fop_unlink_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno);

typedef int32_t (*fop_rmdir_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno);

typedef int32_t (*fop_symlink_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      inode_t *inode,
				      struct stat *buf);

typedef int32_t (*fop_rename_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     struct stat *buf);

typedef int32_t (*fop_link_cbk_t) (call_frame_t *frame,
				   void *cookie,
				   xlator_t *this,
				   int32_t op_ret,
				   int32_t op_errno,
				   inode_t *inode,
				   struct stat *buf);

typedef int32_t (*fop_create_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     fd_t *fd,
				     inode_t *inode,
				     struct stat *buf);

typedef int32_t (*fop_open_cbk_t) (call_frame_t *frame,
				   void *cookie,
				   xlator_t *this,
				   int32_t op_ret,
				   int32_t op_errno,
				   fd_t *fd);

typedef int32_t (*fop_readv_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno,
				    struct iovec *vector,
				    int32_t count,
				    struct stat *stbuf);

typedef int32_t (*fop_writev_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     struct stat *stbuf);

typedef int32_t (*fop_flush_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno);

typedef int32_t (*fop_fsync_cbk_t) (call_frame_t *frame,
				    void *cookie,
				    xlator_t *this,
				    int32_t op_ret,
				    int32_t op_errno);

typedef int32_t (*fop_opendir_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      fd_t *fd);

typedef int32_t (*fop_getdents_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       dir_entry_t *entries,
				       int32_t count);

typedef int32_t (*fop_fsyncdir_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno);

typedef int32_t (*fop_statfs_cbk_t) (call_frame_t *frame,
				     void *cookie,
				     xlator_t *this,
				     int32_t op_ret,
				     int32_t op_errno,
				     struct statvfs *buf);

typedef int32_t (*fop_setxattr_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno);

typedef int32_t (*fop_getxattr_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       dict_t *dict);

typedef int32_t (*fop_removexattr_cbk_t) (call_frame_t *frame,
					  void *cookie,
					  xlator_t *this,
					  int32_t op_ret,
					  int32_t op_errno);

typedef int32_t (*fop_lk_cbk_t) (call_frame_t *frame,
				 void *cookie,
				 xlator_t *this,
				 int32_t op_ret,
				 int32_t op_errno,
				 struct flock *flock);

typedef int32_t (*fop_inodelk_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno);

typedef int32_t (*fop_finodelk_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno);

typedef int32_t (*fop_entrylk_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno);

typedef int32_t (*fop_fentrylk_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno);

typedef int32_t (*fop_setdents_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno);

typedef int32_t (*fop_readdir_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      gf_dirent_t *entries);

typedef int32_t (*fop_xattrop_cbk_t) (call_frame_t *frame,
				      void *cookie,
				      xlator_t *this,
				      int32_t op_ret,
				      int32_t op_errno,
				      dict_t *xattr);

typedef int32_t (*fop_fxattrop_cbk_t) (call_frame_t *frame,
				       void *cookie,
				       xlator_t *this,
				       int32_t op_ret,
				       int32_t op_errno,
				       dict_t *xattr);

typedef int32_t (*fop_lock_notify_cbk_t) (call_frame_t *frame,
                                          void *cookie,
                                          xlator_t *this,
                                          int32_t op_ret,
                                          int32_t op_errno);

typedef int32_t (*fop_lock_fnotify_cbk_t) (call_frame_t *frame,
                                           void *cookie,
                                           xlator_t *this,
                                           int32_t op_ret,
                                           int32_t op_errno);

typedef int32_t (*fop_lookup_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *loc,
				 dict_t *xattr_req);

typedef int32_t (*fop_stat_t) (call_frame_t *frame,
			       xlator_t *this,
			       loc_t *loc);

typedef int32_t (*fop_fstat_t) (call_frame_t *frame,
				xlator_t *this,
				fd_t *fd);

typedef int32_t (*fop_chmod_t) (call_frame_t *frame,
				xlator_t *this,
				loc_t *loc,
				mode_t mode);

typedef int32_t (*fop_fchmod_t) (call_frame_t *frame,
				 xlator_t *this,
				 fd_t *fd,
				 mode_t mode);

typedef int32_t (*fop_chown_t) (call_frame_t *frame,
				xlator_t *this,
				loc_t *loc,
				uid_t uid,
				gid_t gid);

typedef int32_t (*fop_fchown_t) (call_frame_t *frame,
				 xlator_t *this,
				 fd_t *fd,
				 uid_t uid,
				 gid_t gid);

typedef int32_t (*fop_truncate_t) (call_frame_t *frame,
				   xlator_t *this,
				   loc_t *loc,
				   off_t offset);

typedef int32_t (*fop_ftruncate_t) (call_frame_t *frame,
				    xlator_t *this,
				    fd_t *fd,
				    off_t offset);

typedef int32_t (*fop_utimens_t) (call_frame_t *frame,
				  xlator_t *this,
				  loc_t *loc,
				  struct timespec tv[2]);

typedef int32_t (*fop_access_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *loc,
				 int32_t mask);

typedef int32_t (*fop_readlink_t) (call_frame_t *frame,
				   xlator_t *this,
				   loc_t *loc,
				   size_t size);

typedef int32_t (*fop_mknod_t) (call_frame_t *frame,
				xlator_t *this,
				loc_t *loc,
				mode_t mode,
				dev_t rdev);

typedef int32_t (*fop_mkdir_t) (call_frame_t *frame,
				xlator_t *this,
				loc_t *loc,
				mode_t mode);

typedef int32_t (*fop_unlink_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *loc);

typedef int32_t (*fop_rmdir_t) (call_frame_t *frame,
				xlator_t *this,
				loc_t *loc);

typedef int32_t (*fop_symlink_t) (call_frame_t *frame,
				  xlator_t *this,
				  const char *linkname,
				  loc_t *loc);

typedef int32_t (*fop_rename_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *oldloc,
				 loc_t *newloc);

typedef int32_t (*fop_link_t) (call_frame_t *frame,
			       xlator_t *this,
			       loc_t *oldloc,
			       loc_t *newloc);

typedef int32_t (*fop_create_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *loc,
				 int32_t flags,
				 mode_t mode,
				 fd_t *fd);

typedef int32_t (*fop_open_t) (call_frame_t *frame,
			       xlator_t *this,
			       loc_t *loc,
			       int32_t flags,
			       fd_t *fd);

typedef int32_t (*fop_readv_t) (call_frame_t *frame,
				xlator_t *this,
				fd_t *fd,
				size_t size,
				off_t offset);

typedef int32_t (*fop_writev_t) (call_frame_t *frame,
				 xlator_t *this,
				 fd_t *fd,
				 struct iovec *vector,
				 int32_t count,
				 off_t offset);

typedef int32_t (*fop_flush_t) (call_frame_t *frame,
				xlator_t *this,
				fd_t *fd);

typedef int32_t (*fop_fsync_t) (call_frame_t *frame,
				xlator_t *this,
				fd_t *fd,
				int32_t datasync);

typedef int32_t (*fop_opendir_t) (call_frame_t *frame,
				  xlator_t *this,
				  loc_t *loc,
				  fd_t *fd);

typedef int32_t (*fop_getdents_t) (call_frame_t *frame,
				   xlator_t *this,
				   fd_t *fd,
				   size_t size,
				   off_t offset,
				   int32_t flag);

typedef int32_t (*fop_fsyncdir_t) (call_frame_t *frame,
				   xlator_t *this,
				   fd_t *fd,
				   int32_t datasync);

typedef int32_t (*fop_statfs_t) (call_frame_t *frame,
				 xlator_t *this,
				 loc_t *loc);

typedef int32_t (*fop_setxattr_t) (call_frame_t *frame,
				   xlator_t *this,
				   loc_t *loc,
				   dict_t *dict,
				   int32_t flags);

typedef int32_t (*fop_getxattr_t) (call_frame_t *frame,
				   xlator_t *this,
				   loc_t *loc,
				   const char *name);

typedef int32_t (*fop_removexattr_t) (call_frame_t *frame,
				      xlator_t *this,
				      loc_t *loc,
				      const char *name);

typedef int32_t (*fop_lk_t) (call_frame_t *frame,
			     xlator_t *this,
			     fd_t *fd,
			     int32_t cmd,
			     struct flock *flock);

typedef int32_t (*fop_inodelk_t) (call_frame_t *frame,
				  xlator_t *this,
				  loc_t *loc,
				  int32_t cmd,
				  struct flock *flock);

typedef int32_t (*fop_finodelk_t) (call_frame_t *frame,
				   xlator_t *this,
				   fd_t *fd,
				   int32_t cmd,
				   struct flock *flock);

typedef int32_t (*fop_entrylk_t) (call_frame_t *frame,
				  xlator_t *this, loc_t *loc,
				  const char *basename, entrylk_cmd cmd,
				  entrylk_type type);

typedef int32_t (*fop_fentrylk_t) (call_frame_t *frame,
				   xlator_t *this, fd_t *fd,
				   const char *basename, entrylk_cmd cmd,
				   entrylk_type type);

typedef int32_t (*fop_setdents_t) (call_frame_t *frame,
				   xlator_t *this,
				   fd_t *fd,
				   int32_t flags,
				   dir_entry_t *entries,
				   int32_t count);

typedef int32_t (*fop_readdir_t) (call_frame_t *frame,
				  xlator_t *this,
				  fd_t *fd,
				  size_t size,
				  off_t offset);

typedef int32_t (*fop_xattrop_t) (call_frame_t *frame,
				  xlator_t *this,
				  loc_t *loc,
				  gf_xattrop_flags_t optype,
				  dict_t *xattr);

typedef int32_t (*fop_fxattrop_t) (call_frame_t *frame,
				   xlator_t *this,
				   fd_t *fd,
				   gf_xattrop_flags_t optype,
				   dict_t *xattr);


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