[mirror_ubuntu-artful-kernel.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_SUBVOL_CREATE_ASYNC	(1ULL << 0)

#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];
};

#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_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
				   struct btrfs_ioctl_vol_args_v2)
#endif
Commit	Line	Data
6cbd5570 CM	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
c5739bba CM	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
8a4b83cc	25
c071fcfd	26	/* this should be 4k */
72fd032e	27	#define BTRFS_PATH_NAME_MAX 4087
c5739bba	28	struct btrfs_ioctl_vol_args {
3de4586c	29	__s64 fd;
8a4b83cc	30	char name[BTRFS_PATH_NAME_MAX + 1];
c5739bba CM	31	};
c5739bba CM	32
fdfb1e4f LZ	33	#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
	34
	35	#define BTRFS_SUBVOL_NAME_MAX 4039
	36	struct btrfs_ioctl_vol_args_v2 {
72fd032e SW	37	__s64 fd;
72fd032e SW	38	__u64 transid;
fdfb1e4f LZ	39	__u64 flags;
	40	__u64 unused[4];
	41	char name[BTRFS_SUBVOL_NAME_MAX + 1];
72fd032e SW	42	};
72fd032e SW	43
ac8e9819 CM	44	#define BTRFS_INO_LOOKUP_PATH_MAX 4080
	45	struct btrfs_ioctl_ino_lookup_args {
	46	__u64 treeid;
	47	__u64 objectid;
	48	char name[BTRFS_INO_LOOKUP_PATH_MAX];
	49	};
	50
	51	struct btrfs_ioctl_search_key {
	52	/* which root are we searching. 0 is the tree of tree roots */
	53	__u64 tree_id;
	54
	55	/* keys returned will be >= min and <= max */
	56	__u64 min_objectid;
	57	__u64 max_objectid;
	58
	59	/* keys returned will be >= min and <= max */
	60	__u64 min_offset;
	61	__u64 max_offset;
	62
	63	/* max and min transids to search for */
	64	__u64 min_transid;
	65	__u64 max_transid;
	66
	67	/* keys returned will be >= min and <= max */
	68	__u32 min_type;
	69	__u32 max_type;
	70
	71	/*
	72	* how many items did userland ask for, and how many are we
	73	* returning
	74	*/
	75	__u32 nr_items;
	76
	77	/* align to 64 bits */
	78	__u32 unused;
	79
	80	/* some extra for later */
	81	__u64 unused1;
	82	__u64 unused2;
	83	__u64 unused3;
	84	__u64 unused4;
	85	};
	86
	87	struct btrfs_ioctl_search_header {
	88	__u64 transid;
	89	__u64 objectid;
	90	__u64 offset;
	91	__u32 type;
	92	__u32 len;
	93	};
	94
	95	#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
	96	/*
	97	* the buf is an array of search headers where
	98	* each header is followed by the actual item
	99	* the type field is expanded to 32 bits for alignment
	100	*/
	101	struct btrfs_ioctl_search_args {
	102	struct btrfs_ioctl_search_key key;
	103	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
	104	};
	105
c071fcfd CM	106	struct btrfs_ioctl_clone_range_args {
	107	__s64 src_fd;
	108	__u64 src_offset, src_length;
	109	__u64 dest_offset;
	110	};
	111
1e701a32 CM	112	/* flags for the defrag range ioctl */
	113	#define BTRFS_DEFRAG_RANGE_COMPRESS 1
	114	#define BTRFS_DEFRAG_RANGE_START_IO 2
	115
	116	struct btrfs_ioctl_defrag_range_args {
	117	/* start of the defrag operation */
	118	__u64 start;
	119
	120	/* number of bytes to defrag, use (u64)-1 to say all */
	121	__u64 len;
	122
	123	/*
	124	* flags for the operation, which can include turning
	125	* on compression for this one defrag
	126	*/
	127	__u64 flags;
	128
	129	/*
	130	* any extent bigger than this will be considered
	131	* already defragged. Use 0 to take the kernel default
	132	* Use 1 to say every single extent must be rewritten
	133	*/
	134	__u32 extent_thresh;
	135
	136	/* spare for later */
	137	__u32 unused[5];
	138	};
	139
1406e432	140	struct btrfs_ioctl_space_info {
ce769a29 SW	141	__u64 flags;
	142	__u64 total_bytes;
	143	__u64 used_bytes;
1406e432 JB	144	};
	145
	146	struct btrfs_ioctl_space_args {
ce769a29 SW	147	__u64 space_slots;
ce769a29 SW	148	__u64 total_spaces;
1406e432 JB	149	struct btrfs_ioctl_space_info spaces[0];
1406e432 JB	150	};
1e701a32	151
c5739bba CM	152	#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
c5739bba CM	153	struct btrfs_ioctl_vol_args)
6702ed49	154	#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
8352d8a4	155	struct btrfs_ioctl_vol_args)
edbd8d4e CM	156	#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
edbd8d4e CM	157	struct btrfs_ioctl_vol_args)
8a4b83cc CM	158	#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
8a4b83cc CM	159	struct btrfs_ioctl_vol_args)
6bf13c0c SW	160	/* trans start and trans end are dangerous, and only for
	161	* use by applications that know how to avoid the
	162	* resulting deadlocks
	163	*/
	164	#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
	165	#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
	166	#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
	167
f2eb0a24	168	#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
788f20eb CM	169	#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
	170	struct btrfs_ioctl_vol_args)
	171	#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
	172	struct btrfs_ioctl_vol_args)
	173	#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
	174	struct btrfs_ioctl_vol_args)
c5c9cd4d SW	175
	176	#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
	177	struct btrfs_ioctl_clone_range_args)
	178
3de4586c CM	179	#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
3de4586c CM	180	struct btrfs_ioctl_vol_args)
76dda93c YZ	181	#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
76dda93c YZ	182	struct btrfs_ioctl_vol_args)
1e701a32 CM	183	#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1e701a32 CM	184	struct btrfs_ioctl_defrag_range_args)
ac8e9819 CM	185	#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
	186	struct btrfs_ioctl_search_args)
	187	#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
	188	struct btrfs_ioctl_ino_lookup_args)
6ef5ed0d	189	#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
1406e432 JB	190	#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1406e432 JB	191	struct btrfs_ioctl_space_args)
46204592 SW	192	#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
46204592 SW	193	#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
fdfb1e4f LZ	194	#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
fdfb1e4f LZ	195	struct btrfs_ioctl_vol_args_v2)
c5739bba	196	#endif