[net-next-2.6.git] / fs / btrfs / ioctl.h

/*
 * 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_SNAPSHOT_NAME_MAX 4079
struct btrfs_ioctl_async_vol_args {
	__s64 fd;
	__u64 transid;
	char name[BTRFS_SNAPSHOT_NAME_MAX + 1];
};

#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_defrag_range_args {
	/* start of the defrag operation */
	__u64 start;

	/* number of bytes to defrag, use (u64)-1 to say all */
	__u64 len;

	/*
	 * flags for the operation, which can include turning
	 * on compression for this one defrag
	 */
	__u64 flags;

	/*
	 * any extent bigger than this will be considered
	 * already defragged.  Use 0 to take the kernel default
	 * Use 1 to say every single extent must be rewritten
	 */
	__u32 extent_thresh;

	/* spare for later */
	__u32 unused[5];
};

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];
};

#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_ASYNC _IOW(BTRFS_IOCTL_MAGIC, 23, \
				   struct btrfs_ioctl_async_vol_args)
#endif
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2007 Oracle. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public
	6	* License v2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public
	14	* License along with this program; if not, write to the
	15	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	16	* Boston, MA 021110-1307, USA.
	17	*/
	18
	19	#ifndef __IOCTL_
	20	#define __IOCTL_
	21	#include <linux/ioctl.h>
	22
	23	#define BTRFS_IOCTL_MAGIC 0x94
	24	#define BTRFS_VOL_NAME_MAX 255
	25
	26	/* this should be 4k */
	27	#define BTRFS_PATH_NAME_MAX 4087
	28	struct btrfs_ioctl_vol_args {
	29	__s64 fd;
	30	char name[BTRFS_PATH_NAME_MAX + 1];
	31	};
	32
	33	#define BTRFS_SNAPSHOT_NAME_MAX 4079
	34	struct btrfs_ioctl_async_vol_args {
	35	__s64 fd;
	36	__u64 transid;
	37	char name[BTRFS_SNAPSHOT_NAME_MAX + 1];
	38	};
	39
	40	#define BTRFS_INO_LOOKUP_PATH_MAX 4080
	41	struct btrfs_ioctl_ino_lookup_args {
	42	__u64 treeid;
	43	__u64 objectid;
	44	char name[BTRFS_INO_LOOKUP_PATH_MAX];
	45	};
	46
	47	struct btrfs_ioctl_search_key {
	48	/* which root are we searching. 0 is the tree of tree roots */
	49	__u64 tree_id;
	50
	51	/* keys returned will be >= min and <= max */
	52	__u64 min_objectid;
	53	__u64 max_objectid;
	54
	55	/* keys returned will be >= min and <= max */
	56	__u64 min_offset;
	57	__u64 max_offset;
	58
	59	/* max and min transids to search for */
	60	__u64 min_transid;
	61	__u64 max_transid;
	62
	63	/* keys returned will be >= min and <= max */
	64	__u32 min_type;
	65	__u32 max_type;
	66
	67	/*
	68	* how many items did userland ask for, and how many are we
	69	* returning
	70	*/
	71	__u32 nr_items;
	72
	73	/* align to 64 bits */
	74	__u32 unused;
	75
	76	/* some extra for later */
	77	__u64 unused1;
	78	__u64 unused2;
	79	__u64 unused3;
	80	__u64 unused4;
	81	};
	82
	83	struct btrfs_ioctl_search_header {
	84	__u64 transid;
	85	__u64 objectid;
	86	__u64 offset;
	87	__u32 type;
	88	__u32 len;
	89	};
	90
	91	#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
	92	/*
	93	* the buf is an array of search headers where
	94	* each header is followed by the actual item
	95	* the type field is expanded to 32 bits for alignment
	96	*/
	97	struct btrfs_ioctl_search_args {
	98	struct btrfs_ioctl_search_key key;
	99	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
	100	};
	101
	102	struct btrfs_ioctl_clone_range_args {
	103	__s64 src_fd;
	104	__u64 src_offset, src_length;
	105	__u64 dest_offset;
	106	};
	107
	108	/* flags for the defrag range ioctl */
	109	#define BTRFS_DEFRAG_RANGE_COMPRESS 1
	110	#define BTRFS_DEFRAG_RANGE_START_IO 2
	111
	112	struct btrfs_ioctl_defrag_range_args {
	113	/* start of the defrag operation */
	114	__u64 start;
	115
	116	/* number of bytes to defrag, use (u64)-1 to say all */
	117	__u64 len;
	118
	119	/*
	120	* flags for the operation, which can include turning
	121	* on compression for this one defrag
	122	*/
	123	__u64 flags;
	124
	125	/*
	126	* any extent bigger than this will be considered
	127	* already defragged. Use 0 to take the kernel default
	128	* Use 1 to say every single extent must be rewritten
	129	*/
	130	__u32 extent_thresh;
	131
	132	/* spare for later */
	133	__u32 unused[5];
	134	};
	135
	136	struct btrfs_ioctl_space_info {
	137	__u64 flags;
	138	__u64 total_bytes;
	139	__u64 used_bytes;
	140	};
	141
	142	struct btrfs_ioctl_space_args {
	143	__u64 space_slots;
	144	__u64 total_spaces;
	145	struct btrfs_ioctl_space_info spaces[0];
	146	};
	147
	148	#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
	149	struct btrfs_ioctl_vol_args)
	150	#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
	151	struct btrfs_ioctl_vol_args)
	152	#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
	153	struct btrfs_ioctl_vol_args)
	154	#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
	155	struct btrfs_ioctl_vol_args)
	156	/* trans start and trans end are dangerous, and only for
	157	* use by applications that know how to avoid the
	158	* resulting deadlocks
	159	*/
	160	#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
	161	#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
	162	#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
	163
	164	#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
	165	#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
	166	struct btrfs_ioctl_vol_args)
	167	#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
	168	struct btrfs_ioctl_vol_args)
	169	#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
	170	struct btrfs_ioctl_vol_args)
	171
	172	#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
	173	struct btrfs_ioctl_clone_range_args)
	174
	175	#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
	176	struct btrfs_ioctl_vol_args)
	177	#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
	178	struct btrfs_ioctl_vol_args)
	179	#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
	180	struct btrfs_ioctl_defrag_range_args)
	181	#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
	182	struct btrfs_ioctl_search_args)
	183	#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
	184	struct btrfs_ioctl_ino_lookup_args)
	185	#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
	186	#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
	187	struct btrfs_ioctl_space_args)
	188	#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
	189	#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
	190	#define BTRFS_IOC_SNAP_CREATE_ASYNC _IOW(BTRFS_IOCTL_MAGIC, 23, \
	191	struct btrfs_ioctl_async_vol_args)
	192	#endif