/*
   * Copyright (C) 2007 Oracle.  All rights reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public
   * License v2 as published by the Free Software Foundation.
   *
   * This program 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, write to the
   * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   * Boston, MA 021110-1307, USA.
   */

  #ifndef __IOCTL_
  #define __IOCTL_
  #include <linux/ioctl.h>
  
  #define BTRFS_IOCTL_MAGIC 0x94
  #define BTRFS_VOL_NAME_MAX 255

  /* this should be 4k */

  #define BTRFS_PATH_NAME_MAX 4087

  struct btrfs_ioctl_vol_args {

  	__s64 fd;

  	char name[BTRFS_PATH_NAME_MAX + 1];

  };

  #define BTRFS_SUBVOL_CREATE_ASYNC	(1ULL << 0)

  #define BTRFS_SUBVOL_RDONLY		(1ULL << 1)

  #define BTRFS_FSID_SIZE 16
  #define BTRFS_UUID_SIZE 16

  
  #define BTRFS_SUBVOL_NAME_MAX 4039
  struct btrfs_ioctl_vol_args_v2 {

  	__s64 fd;
  	__u64 transid;

  	__u64 flags;
  	__u64 unused[4];
  	char name[BTRFS_SUBVOL_NAME_MAX + 1];

  };

  /*
   * structure to report errors and progress to userspace, either as a
   * result of a finished scrub, a canceled scrub or a progress inquiry
   */
  struct btrfs_scrub_progress {
  	__u64 data_extents_scrubbed;	/* # of data extents scrubbed */
  	__u64 tree_extents_scrubbed;	/* # of tree extents scrubbed */
  	__u64 data_bytes_scrubbed;	/* # of data bytes scrubbed */
  	__u64 tree_bytes_scrubbed;	/* # of tree bytes scrubbed */
  	__u64 read_errors;		/* # of read errors encountered (EIO) */
  	__u64 csum_errors;		/* # of failed csum checks */
  	__u64 verify_errors;		/* # of occurences, where the metadata
  					 * of a tree block did not match the
  					 * expected values, like generation or
  					 * logical */
  	__u64 no_csum;			/* # of 4k data block for which no csum
  					 * is present, probably the result of
  					 * data written with nodatasum */
  	__u64 csum_discards;		/* # of csum for which no data was found
  					 * in the extent tree. */
  	__u64 super_errors;		/* # of bad super blocks encountered */
  	__u64 malloc_errors;		/* # of internal kmalloc errors. These
  					 * will likely cause an incomplete
  					 * scrub */
  	__u64 uncorrectable_errors;	/* # of errors where either no intact
  					 * copy was found or the writeback
  					 * failed */
  	__u64 corrected_errors;		/* # of errors corrected */
  	__u64 last_physical;		/* last physical address scrubbed. In
  					 * case a scrub was aborted, this can
  					 * be used to restart the scrub */
  	__u64 unverified_errors;	/* # of occurences where a read for a
  					 * full (64k) bio failed, but the re-
  					 * check succeeded for each 4k piece.
  					 * Intermittent error. */
  };

  #define BTRFS_SCRUB_READONLY	1

  struct btrfs_ioctl_scrub_args {
  	__u64 devid;				/* in */
  	__u64 start;				/* in */
  	__u64 end;				/* in */
  	__u64 flags;				/* in */
  	struct btrfs_scrub_progress progress;	/* out */
  	/* pad to 1k */
  	__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
  };
  
  #define BTRFS_DEVICE_PATH_NAME_MAX 1024
  struct btrfs_ioctl_dev_info_args {
  	__u64 devid;				/* in/out */
  	__u8 uuid[BTRFS_UUID_SIZE];		/* in/out */
  	__u64 bytes_used;			/* out */
  	__u64 total_bytes;			/* out */
  	__u64 unused[379];			/* pad to 4k */
  	__u8 path[BTRFS_DEVICE_PATH_NAME_MAX];	/* out */
  };
  
  struct btrfs_ioctl_fs_info_args {
  	__u64 max_id;				/* out */
  	__u64 num_devices;			/* out */
  	__u8 fsid[BTRFS_FSID_SIZE];		/* out */
  	__u64 reserved[124];			/* pad to 1k */
  };

  #define BTRFS_INO_LOOKUP_PATH_MAX 4080
  struct btrfs_ioctl_ino_lookup_args {
  	__u64 treeid;
  	__u64 objectid;
  	char name[BTRFS_INO_LOOKUP_PATH_MAX];
  };
  
  struct btrfs_ioctl_search_key {
  	/* which root are we searching.  0 is the tree of tree roots */
  	__u64 tree_id;
  
  	/* keys returned will be >= min and <= max */
  	__u64 min_objectid;
  	__u64 max_objectid;
  
  	/* keys returned will be >= min and <= max */
  	__u64 min_offset;
  	__u64 max_offset;
  
  	/* max and min transids to search for */
  	__u64 min_transid;
  	__u64 max_transid;
  
  	/* keys returned will be >= min and <= max */
  	__u32 min_type;
  	__u32 max_type;
  
  	/*
  	 * how many items did userland ask for, and how many are we
  	 * returning
  	 */
  	__u32 nr_items;
  
  	/* align to 64 bits */
  	__u32 unused;
  
  	/* some extra for later */
  	__u64 unused1;
  	__u64 unused2;
  	__u64 unused3;
  	__u64 unused4;
  };
  
  struct btrfs_ioctl_search_header {
  	__u64 transid;
  	__u64 objectid;
  	__u64 offset;
  	__u32 type;
  	__u32 len;
  };
  
  #define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
  /*
   * the buf is an array of search headers where
   * each header is followed by the actual item
   * the type field is expanded to 32 bits for alignment
   */
  struct btrfs_ioctl_search_args {
  	struct btrfs_ioctl_search_key key;
  	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
  };

  struct btrfs_ioctl_clone_range_args {
    __s64 src_fd;
    __u64 src_offset, src_length;
    __u64 dest_offset;
  };

  /* flags for the defrag range ioctl */
  #define BTRFS_DEFRAG_RANGE_COMPRESS 1
  #define BTRFS_DEFRAG_RANGE_START_IO 2

  struct btrfs_ioctl_space_info {

  	__u64 flags;
  	__u64 total_bytes;
  	__u64 used_bytes;

  };
  
  struct btrfs_ioctl_space_args {

  	__u64 space_slots;
  	__u64 total_spaces;

  	struct btrfs_ioctl_space_info spaces[0];
  };

  struct btrfs_data_container {
  	__u32	bytes_left;	/* out -- bytes not needed to deliver output */
  	__u32	bytes_missing;	/* out -- additional bytes needed for result */
  	__u32	elem_cnt;	/* out */
  	__u32	elem_missed;	/* out */

  	__u64	val[0];		/* out */

  };

  struct btrfs_ioctl_ino_path_args {
  	__u64				inum;		/* in */
  	__u32				size;		/* in */
  	__u64				reserved[4];

  	/* struct btrfs_data_container	*fspath;	   out */
  	__u64				fspath;		/* out */

  };
  
  struct btrfs_ioctl_logical_ino_args {
  	__u64				logical;	/* in */
  	__u32				size;		/* in */
  	__u64				reserved[4];

  	/* struct btrfs_data_container	*inodes;	out   */
  	__u64				inodes;

  };

  #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
  				   struct btrfs_ioctl_vol_args)

  #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \

  				   struct btrfs_ioctl_vol_args)

  #define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
  				   struct btrfs_ioctl_vol_args)

  #define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
  				   struct btrfs_ioctl_vol_args)

  /* trans start and trans end are dangerous, and only for
   * use by applications that know how to avoid the
   * resulting deadlocks
   */
  #define BTRFS_IOC_TRANS_START  _IO(BTRFS_IOCTL_MAGIC, 6)
  #define BTRFS_IOC_TRANS_END    _IO(BTRFS_IOCTL_MAGIC, 7)
  #define BTRFS_IOC_SYNC         _IO(BTRFS_IOCTL_MAGIC, 8)

  #define BTRFS_IOC_CLONE        _IOW(BTRFS_IOCTL_MAGIC, 9, int)

  #define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
  				   struct btrfs_ioctl_vol_args)
  #define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
  				   struct btrfs_ioctl_vol_args)
  #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
  				   struct btrfs_ioctl_vol_args)

  
  #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
  				  struct btrfs_ioctl_clone_range_args)

  #define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
  				   struct btrfs_ioctl_vol_args)

  #define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
  				struct btrfs_ioctl_vol_args)

  #define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
  				struct btrfs_ioctl_defrag_range_args)

  #define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
  				   struct btrfs_ioctl_search_args)
  #define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
  				   struct btrfs_ioctl_ino_lookup_args)

  #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)

  #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
  				    struct btrfs_ioctl_space_args)

  #define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
  #define BTRFS_IOC_WAIT_SYNC  _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)

  #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
  				   struct btrfs_ioctl_vol_args_v2)

  #define BTRFS_IOC_SUBVOL_GETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 25, __u64)
  #define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)

  #define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
  			      struct btrfs_ioctl_scrub_args)
  #define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
  #define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
  				       struct btrfs_ioctl_scrub_args)
  #define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
  				 struct btrfs_ioctl_dev_info_args)
  #define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
  			       struct btrfs_ioctl_fs_info_args)

  #define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
  					struct btrfs_ioctl_ino_path_args)
  #define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
  					struct btrfs_ioctl_ino_path_args)

  #endif