[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_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 */
};

/* balance control ioctl modes */
#define BTRFS_BALANCE_CTL_PAUSE		1
#define BTRFS_BALANCE_CTL_CANCEL	2

/*
 * this is packed, because it should be exactly the same as its disk
 * byte order counterpart (struct btrfs_disk_balance_args)
 */
struct btrfs_balance_args {
	__u64 profiles;
	__u64 usage;
	__u64 devid;
	__u64 pstart;
	__u64 pend;
	__u64 vstart;
	__u64 vend;

	__u64 target;

	__u64 flags;

	__u64 unused[8];
} __attribute__ ((__packed__));

/* report balance progress to userspace */
struct btrfs_balance_progress {
	__u64 expected;		/* estimated # of chunks that will be
				 * relocated to fulfill the request */
	__u64 considered;	/* # of chunks we have considered so far */
	__u64 completed;	/* # of chunks relocated so far */
};

#define BTRFS_BALANCE_STATE_RUNNING	(1ULL << 0)
#define BTRFS_BALANCE_STATE_PAUSE_REQ	(1ULL << 1)
#define BTRFS_BALANCE_STATE_CANCEL_REQ	(1ULL << 2)

struct btrfs_ioctl_balance_args {
	__u64 flags;				/* in/out */
	__u64 state;				/* out */

	struct btrfs_balance_args data;		/* in/out */
	struct btrfs_balance_args meta;		/* in/out */
	struct btrfs_balance_args sys;		/* in/out */

	struct btrfs_balance_progress stat;	/* out */

	__u64 unused[72];			/* 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 */
	__u64				size;		/* in */
	__u64				reserved[4];
	/* struct btrfs_data_container	*fspath;	   out */
	__u64				fspath;		/* out */
};

struct btrfs_ioctl_logical_ino_args {
	__u64				logical;	/* in */
	__u64				size;		/* in */
	__u64				reserved[4];
	/* struct btrfs_data_container	*inodes;	out   */
	__u64				inodes;
};

enum btrfs_dev_stat_values {
	/* disk I/O failure stats */
	BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
	BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
	BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */

	/* stats for indirect indications for I/O failures */
	BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
					 * contents is illegal: this is an
					 * indication that the block was damaged
					 * during read or write, or written to
					 * wrong location or read from wrong
					 * location */
	BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
					 * been written */

	BTRFS_DEV_STAT_VALUES_MAX
};

struct btrfs_ioctl_get_dev_stats {
	__u64 devid;				/* in */
	__u64 nr_items;				/* in/out */

	/* out values: */
	__u64 values[BTRFS_DEV_STAT_VALUES_MAX];

	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
};

struct btrfs_ioctl_timespec {
	__u64 sec;
	__u32 nsec;
};

struct btrfs_ioctl_received_subvol_args {
	char	uuid[BTRFS_UUID_SIZE];	/* in */
	__u64	stransid;		/* in */
	__u64	rtransid;		/* out */
	struct btrfs_ioctl_timespec stime; /* in */
	struct btrfs_ioctl_timespec rtime; /* out */
	__u64	flags;			/* in */
	__u64	reserved[16];		/* in */
};

#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 _IOR(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_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
				   struct btrfs_ioctl_balance_args)
#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
#define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
					struct btrfs_ioctl_balance_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)
#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
				struct btrfs_ioctl_received_subvol_args)
#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
				      struct btrfs_ioctl_get_dev_stats)
#define BTRFS_IOC_GET_AND_RESET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 53, \
					struct btrfs_ioctl_get_dev_stats)

#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)
475f6387 JS	35	#define BTRFS_FSID_SIZE 16
475f6387 JS	36	#define BTRFS_UUID_SIZE 16
fdfb1e4f LZ	37
	38	#define BTRFS_SUBVOL_NAME_MAX 4039
	39	struct btrfs_ioctl_vol_args_v2 {
72fd032e SW	40	__s64 fd;
72fd032e SW	41	__u64 transid;
fdfb1e4f LZ	42	__u64 flags;
	43	__u64 unused[4];
	44	char name[BTRFS_SUBVOL_NAME_MAX + 1];
72fd032e SW	45	};
72fd032e SW	46
a2de733c AJ	47	/*
	48	* structure to report errors and progress to userspace, either as a
	49	* result of a finished scrub, a canceled scrub or a progress inquiry
	50	*/
	51	struct btrfs_scrub_progress {
	52	__u64 data_extents_scrubbed; /* # of data extents scrubbed */
	53	__u64 tree_extents_scrubbed; /* # of tree extents scrubbed */
	54	__u64 data_bytes_scrubbed; /* # of data bytes scrubbed */
	55	__u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */
	56	__u64 read_errors; /* # of read errors encountered (EIO) */
	57	__u64 csum_errors; /* # of failed csum checks */
	58	__u64 verify_errors; /* # of occurences, where the metadata
	59	* of a tree block did not match the
	60	* expected values, like generation or
	61	* logical */
	62	__u64 no_csum; /* # of 4k data block for which no csum
	63	* is present, probably the result of
	64	* data written with nodatasum */
	65	__u64 csum_discards; /* # of csum for which no data was found
	66	* in the extent tree. */
	67	__u64 super_errors; /* # of bad super blocks encountered */
	68	__u64 malloc_errors; /* # of internal kmalloc errors. These
	69	* will likely cause an incomplete
	70	* scrub */
	71	__u64 uncorrectable_errors; /* # of errors where either no intact
	72	* copy was found or the writeback
	73	* failed */
	74	__u64 corrected_errors; /* # of errors corrected */
	75	__u64 last_physical; /* last physical address scrubbed. In
	76	* case a scrub was aborted, this can
	77	* be used to restart the scrub */
	78	__u64 unverified_errors; /* # of occurences where a read for a
	79	* full (64k) bio failed, but the re-
	80	* check succeeded for each 4k piece.
	81	* Intermittent error. */
	82	};
	83
8628764e	84	#define BTRFS_SCRUB_READONLY 1
475f6387 JS	85	struct btrfs_ioctl_scrub_args {
	86	__u64 devid; /* in */
	87	__u64 start; /* in */
	88	__u64 end; /* in */
	89	__u64 flags; /* in */
	90	struct btrfs_scrub_progress progress; /* out */
	91	/* pad to 1k */
	92	__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];
	93	};
	94
	95	#define BTRFS_DEVICE_PATH_NAME_MAX 1024
	96	struct btrfs_ioctl_dev_info_args {
	97	__u64 devid; /* in/out */
	98	__u8 uuid[BTRFS_UUID_SIZE]; /* in/out */
	99	__u64 bytes_used; /* out */
	100	__u64 total_bytes; /* out */
	101	__u64 unused[379]; /* pad to 4k */
	102	__u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */
	103	};
	104
	105	struct btrfs_ioctl_fs_info_args {
	106	__u64 max_id; /* out */
	107	__u64 num_devices; /* out */
	108	__u8 fsid[BTRFS_FSID_SIZE]; /* out */
	109	__u64 reserved[124]; /* pad to 1k */
	110	};
	111
837d5b6e ID	112	/* balance control ioctl modes */
837d5b6e ID	113	#define BTRFS_BALANCE_CTL_PAUSE 1
a7e99c69	114	#define BTRFS_BALANCE_CTL_CANCEL 2
837d5b6e	115
c9e9f97b ID	116	/*
	117	* this is packed, because it should be exactly the same as its disk
	118	* byte order counterpart (struct btrfs_disk_balance_args)
	119	*/
	120	struct btrfs_balance_args {
	121	__u64 profiles;
	122	__u64 usage;
	123	__u64 devid;
	124	__u64 pstart;
	125	__u64 pend;
	126	__u64 vstart;
	127	__u64 vend;
	128
	129	__u64 target;
	130
	131	__u64 flags;
	132
	133	__u64 unused[8];
	134	} __attribute__ ((__packed__));
	135
	136	/* report balance progress to userspace */
	137	struct btrfs_balance_progress {
	138	__u64 expected; /* estimated # of chunks that will be
	139	* relocated to fulfill the request */
	140	__u64 considered; /* # of chunks we have considered so far */
	141	__u64 completed; /* # of chunks relocated so far */
	142	};
	143
837d5b6e ID	144	#define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0)
837d5b6e ID	145	#define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1)
a7e99c69	146	#define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2)
837d5b6e	147
c9e9f97b ID	148	struct btrfs_ioctl_balance_args {
	149	__u64 flags; /* in/out */
	150	__u64 state; /* out */
	151
	152	struct btrfs_balance_args data; /* in/out */
	153	struct btrfs_balance_args meta; /* in/out */
	154	struct btrfs_balance_args sys; /* in/out */
	155
	156	struct btrfs_balance_progress stat; /* out */
	157
	158	__u64 unused[72]; /* pad to 1k */
	159	};
	160
ac8e9819 CM	161	#define BTRFS_INO_LOOKUP_PATH_MAX 4080
	162	struct btrfs_ioctl_ino_lookup_args {
	163	__u64 treeid;
	164	__u64 objectid;
	165	char name[BTRFS_INO_LOOKUP_PATH_MAX];
	166	};
	167
	168	struct btrfs_ioctl_search_key {
	169	/* which root are we searching. 0 is the tree of tree roots */
	170	__u64 tree_id;
	171
	172	/* keys returned will be >= min and <= max */
	173	__u64 min_objectid;
	174	__u64 max_objectid;
	175
	176	/* keys returned will be >= min and <= max */
	177	__u64 min_offset;
	178	__u64 max_offset;
	179
	180	/* max and min transids to search for */
	181	__u64 min_transid;
	182	__u64 max_transid;
	183
	184	/* keys returned will be >= min and <= max */
	185	__u32 min_type;
	186	__u32 max_type;
	187
	188	/*
	189	* how many items did userland ask for, and how many are we
	190	* returning
	191	*/
	192	__u32 nr_items;
	193
	194	/* align to 64 bits */
	195	__u32 unused;
	196
	197	/* some extra for later */
	198	__u64 unused1;
	199	__u64 unused2;
	200	__u64 unused3;
	201	__u64 unused4;
	202	};
	203
	204	struct btrfs_ioctl_search_header {
	205	__u64 transid;
	206	__u64 objectid;
	207	__u64 offset;
	208	__u32 type;
	209	__u32 len;
	210	};
	211
	212	#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
	213	/*
	214	* the buf is an array of search headers where
	215	* each header is followed by the actual item
	216	* the type field is expanded to 32 bits for alignment
	217	*/
	218	struct btrfs_ioctl_search_args {
	219	struct btrfs_ioctl_search_key key;
	220	char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
	221	};
	222
c071fcfd CM	223	struct btrfs_ioctl_clone_range_args {
	224	__s64 src_fd;
	225	__u64 src_offset, src_length;
	226	__u64 dest_offset;
	227	};
	228
1e701a32 CM	229	/* flags for the defrag range ioctl */
	230	#define BTRFS_DEFRAG_RANGE_COMPRESS 1
	231	#define BTRFS_DEFRAG_RANGE_START_IO 2
	232
1406e432	233	struct btrfs_ioctl_space_info {
ce769a29 SW	234	__u64 flags;
	235	__u64 total_bytes;
	236	__u64 used_bytes;
1406e432 JB	237	};
	238
	239	struct btrfs_ioctl_space_args {
ce769a29 SW	240	__u64 space_slots;
ce769a29 SW	241	__u64 total_spaces;
1406e432 JB	242	struct btrfs_ioctl_space_info spaces[0];
1406e432 JB	243	};
1e701a32	244
a542ad1b JS	245	struct btrfs_data_container {
	246	__u32 bytes_left; /* out -- bytes not needed to deliver output */
	247	__u32 bytes_missing; /* out -- additional bytes needed for result */
	248	__u32 elem_cnt; /* out */
	249	__u32 elem_missed; /* out */
740c3d22	250	__u64 val[0]; /* out */
a542ad1b JS	251	};
a542ad1b JS	252
d7728c96 JS	253	struct btrfs_ioctl_ino_path_args {
d7728c96 JS	254	__u64 inum; /* in */
d04b1deb	255	__u64 size; /* in */
d7728c96	256	__u64 reserved[4];
740c3d22 CM	257	/* struct btrfs_data_container fspath; out /
740c3d22 CM	258	__u64 fspath; /* out */
d7728c96 JS	259	};
	260
	261	struct btrfs_ioctl_logical_ino_args {
	262	__u64 logical; /* in */
d04b1deb	263	__u64 size; /* in */
d7728c96	264	__u64 reserved[4];
740c3d22 CM	265	/* struct btrfs_data_container inodes; out /
740c3d22 CM	266	__u64 inodes;
d7728c96 JS	267	};
d7728c96 JS	268
442a4f63 SB	269	enum btrfs_dev_stat_values {
	270	/* disk I/O failure stats */
	271	BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
	272	BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
	273	BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
	274
	275	/* stats for indirect indications for I/O failures */
	276	BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
	277	* contents is illegal: this is an
	278	* indication that the block was damaged
	279	* during read or write, or written to
	280	* wrong location or read from wrong
	281	* location */
	282	BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
	283	* been written */
	284
	285	BTRFS_DEV_STAT_VALUES_MAX
	286	};
	287
c11d2c23 SB	288	struct btrfs_ioctl_get_dev_stats {
	289	__u64 devid; /* in */
	290	__u64 nr_items; /* in/out */
	291
	292	/* out values: */
	293	__u64 values[BTRFS_DEV_STAT_VALUES_MAX];
	294
	295	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
	296	};
	297
8ea05e3a AB	298	struct btrfs_ioctl_timespec {
	299	__u64 sec;
	300	__u32 nsec;
	301	};
	302
	303	struct btrfs_ioctl_received_subvol_args {
	304	char uuid[BTRFS_UUID_SIZE]; /* in */
	305	__u64 stransid; /* in */
	306	__u64 rtransid; /* out */
	307	struct btrfs_ioctl_timespec stime; /* in */
	308	struct btrfs_ioctl_timespec rtime; /* out */
	309	__u64 flags; /* in */
	310	__u64 reserved[16]; /* in */
	311	};
	312
c5739bba CM	313	#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
c5739bba CM	314	struct btrfs_ioctl_vol_args)
6702ed49	315	#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
8352d8a4	316	struct btrfs_ioctl_vol_args)
edbd8d4e CM	317	#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
edbd8d4e CM	318	struct btrfs_ioctl_vol_args)
8a4b83cc CM	319	#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
8a4b83cc CM	320	struct btrfs_ioctl_vol_args)
6bf13c0c SW	321	/* trans start and trans end are dangerous, and only for
	322	* use by applications that know how to avoid the
	323	* resulting deadlocks
	324	*/
	325	#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
	326	#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
	327	#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
	328
f2eb0a24	329	#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
788f20eb CM	330	#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
	331	struct btrfs_ioctl_vol_args)
	332	#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
	333	struct btrfs_ioctl_vol_args)
	334	#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
	335	struct btrfs_ioctl_vol_args)
c5c9cd4d SW	336
	337	#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
	338	struct btrfs_ioctl_clone_range_args)
	339
3de4586c CM	340	#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
3de4586c CM	341	struct btrfs_ioctl_vol_args)
76dda93c YZ	342	#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
76dda93c YZ	343	struct btrfs_ioctl_vol_args)
1e701a32 CM	344	#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
1e701a32 CM	345	struct btrfs_ioctl_defrag_range_args)
ac8e9819 CM	346	#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
	347	struct btrfs_ioctl_search_args)
	348	#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
	349	struct btrfs_ioctl_ino_lookup_args)
6ef5ed0d	350	#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
1406e432 JB	351	#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
1406e432 JB	352	struct btrfs_ioctl_space_args)
46204592 SW	353	#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
46204592 SW	354	#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
fdfb1e4f LZ	355	#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
fdfb1e4f LZ	356	struct btrfs_ioctl_vol_args_v2)
d3a94048	357	#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
0caa102d	358	#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
475f6387 JS	359	#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
	360	struct btrfs_ioctl_scrub_args)
	361	#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
	362	#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
	363	struct btrfs_ioctl_scrub_args)
	364	#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
	365	struct btrfs_ioctl_dev_info_args)
	366	#define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
	367	struct btrfs_ioctl_fs_info_args)
c9e9f97b ID	368	#define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
c9e9f97b ID	369	struct btrfs_ioctl_balance_args)
837d5b6e	370	#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
19a39dce ID	371	#define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
19a39dce ID	372	struct btrfs_ioctl_balance_args)
d7728c96 JS	373	#define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
	374	struct btrfs_ioctl_ino_path_args)
	375	#define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
	376	struct btrfs_ioctl_ino_path_args)
8ea05e3a AB	377	#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
8ea05e3a AB	378	struct btrfs_ioctl_received_subvol_args)
c11d2c23 SB	379	#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
	380	struct btrfs_ioctl_get_dev_stats)
	381	#define BTRFS_IOC_GET_AND_RESET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 53, \
	382	struct btrfs_ioctl_get_dev_stats)
d7728c96	383
c5739bba	384	#endif