[deliverable/linux.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_RDONLY		(1ULL << 1)

#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	33	#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
b83cc969	34	#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
fdfb1e4f LZ	35
	36	#define BTRFS_SUBVOL_NAME_MAX 4039
	37	struct btrfs_ioctl_vol_args_v2 {
72fd032e SW	38	__s64 fd;
72fd032e SW	39	__u64 transid;
fdfb1e4f LZ	40	__u64 flags;
	41	__u64 unused[4];
	42	char name[BTRFS_SUBVOL_NAME_MAX + 1];
72fd032e SW	43	};
72fd032e SW	44
ac8e9819 CM	45	#define BTRFS_INO_LOOKUP_PATH_MAX 4080
	46	struct btrfs_ioctl_ino_lookup_args {
	47	__u64 treeid;
	48	__u64 objectid;
	49	char name[BTRFS_INO_LOOKUP_PATH_MAX];
	50	};
	51
	52	struct btrfs_ioctl_search_key {
	53	/* which root are we searching. 0 is the tree of tree roots */
	54	__u64 tree_id;
	55
	56	/* keys returned will be >= min and <= max */
	57	__u64 min_objectid;
	58	__u64 max_objectid;
	59
	60	/* keys returned will be >= min and <= max */
	61	__u64 min_offset;
	62	__u64 max_offset;
	63
	64	/* max and min transids to search for */
	65	__u64 min_transid;
	66	__u64 max_transid;
	67
	68	/* keys returned will be >= min and <= max */
	69	__u32 min_type;
	70	__u32 max_type;
	71
	72	/*
	73	* how many items did userland ask for, and how many are we
	74	* returning
	75	*/
	76	__u32 nr_items;
	77
	78	/* align to 64 bits */
	79	__u32 unused;
	80
	81	/* some extra for later */
	82	__u64 unused1;
	83	__u64 unused2;
	84	__u64 unused3;
	85	__u64 unused4;
	86	};
	87
	88	struct btrfs_ioctl_search_header {
	89	__u64 transid;
	90	__u64 objectid;
	91	__u64 offset;
	92	__u32 type;
	93	__u32 len;
	94	};
	95
	96	#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
	97	/*
	98	* the buf is an array of search headers where
	99	* each header is followed by the actual item
	100	* the type field is expanded to 32 bits for alignment
	101	*/
	102	struct btrfs_ioctl_search_args {
	103	struct btrfs_ioctl_search_key key;
	104	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
	105	};
	106
c071fcfd CM	107	struct btrfs_ioctl_clone_range_args {
	108	__s64 src_fd;
	109	__u64 src_offset, src_length;
	110	__u64 dest_offset;
	111	};
	112
1e701a32 CM	113	/* flags for the defrag range ioctl */
	114	#define BTRFS_DEFRAG_RANGE_COMPRESS 1
	115	#define BTRFS_DEFRAG_RANGE_START_IO 2
	116
	117	struct btrfs_ioctl_defrag_range_args {
	118	/* start of the defrag operation */
	119	__u64 start;
	120
	121	/* number of bytes to defrag, use (u64)-1 to say all */
	122	__u64 len;
	123
	124	/*
	125	* flags for the operation, which can include turning
	126	* on compression for this one defrag
	127	*/
	128	__u64 flags;
	129
	130	/*
	131	* any extent bigger than this will be considered
	132	* already defragged. Use 0 to take the kernel default
	133	* Use 1 to say every single extent must be rewritten
	134	*/
	135	__u32 extent_thresh;
	136
	137	/* spare for later */
	138	__u32 unused[5];
	139	};
	140
1406e432	141	struct btrfs_ioctl_space_info {
ce769a29 SW	142	__u64 flags;
	143	__u64 total_bytes;
	144	__u64 used_bytes;
1406e432 JB	145	};
	146
	147	struct btrfs_ioctl_space_args {
ce769a29 SW	148	__u64 space_slots;
ce769a29 SW	149	__u64 total_spaces;
1406e432 JB	150	struct btrfs_ioctl_space_info spaces[0];
1406e432 JB	151	};
1e701a32	152
c5739bba CM	153	#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
c5739bba CM	154	struct btrfs_ioctl_vol_args)
6702ed49	155	#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
8352d8a4	156	struct btrfs_ioctl_vol_args)
edbd8d4e CM	157	#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
edbd8d4e CM	158	struct btrfs_ioctl_vol_args)
8a4b83cc CM	159	#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
8a4b83cc CM	160	struct btrfs_ioctl_vol_args)
6bf13c0c SW	161	/* trans start and trans end are dangerous, and only for
	162	* use by applications that know how to avoid the
	163	* resulting deadlocks
	164	*/
	165	#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
	166	#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
	167	#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
	168
f2eb0a24	169	#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
788f20eb CM	170	#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
	171	struct btrfs_ioctl_vol_args)
	172	#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
	173	struct btrfs_ioctl_vol_args)
	174	#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
	175	struct btrfs_ioctl_vol_args)
c5c9cd4d SW	176
	177	#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
	178	struct btrfs_ioctl_clone_range_args)
	179
3de4586c CM	180	#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
3de4586c CM	181	struct btrfs_ioctl_vol_args)
76dda93c YZ	182	#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
76dda93c YZ	183	struct btrfs_ioctl_vol_args)
1e701a32 CM	184	#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1e701a32 CM	185	struct btrfs_ioctl_defrag_range_args)
ac8e9819 CM	186	#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
	187	struct btrfs_ioctl_search_args)
	188	#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
	189	struct btrfs_ioctl_ino_lookup_args)
6ef5ed0d	190	#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
1406e432 JB	191	#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1406e432 JB	192	struct btrfs_ioctl_space_args)
46204592 SW	193	#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
46204592 SW	194	#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
fdfb1e4f LZ	195	#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
fdfb1e4f LZ	196	struct btrfs_ioctl_vol_args_v2)
c5739bba	197	#endif