FM / linux

/usr/src/linux-headers-5.15.0-181/include/uapi/linux/

/usr/src/linux-headers-5.15.0-181/include/uapi/linux

Name	Size	Mode	Actions
android/	-	0755	rm
byteorder/	-	0755	rm
caif/	-	0755	rm
can/	-	0755	rm
cifs/	-	0755	rm
dvb/	-	0755	rm
genwqe/	-	0755	rm
hdlc/	-	0755	rm
hsi/	-	0755	rm
iio/	-	0755	rm
isdn/	-	0755	rm
misc/	-	0755	rm
mmc/	-	0755	rm
netfilter/	-	0755	rm
netfilter_arp/	-	0755	rm
netfilter_bridge/	-	0755	rm
netfilter_ipv4/	-	0755	rm
netfilter_ipv6/	-	0755	rm
nfsd/	-	0755	rm
raid/	-	0755	rm
sched/	-	0755	rm
spi/	-	0755	rm
sunrpc/	-	0755	rm
surface_aggregator/	-	0755	rm
tc_act/	-	0755	rm
tc_ematch/	-	0755	rm
usb/	-	0755	rm
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gpio.h	19783	0644	edit dl rm
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ife.h	351	0644	edit dl rm
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Edit: /usr/src/linux-headers-5.15.0-181/include/uapi/linux/btrfs.h (30904B)

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * 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 _UAPI_LINUX_BTRFS_H
#define _UAPI_LINUX_BTRFS_H
#include <linux/types.h>
#include <linux/ioctl.h>

#define BTRFS_IOCTL_MAGIC 0x94
#define BTRFS_VOL_NAME_MAX 255
#define BTRFS_LABEL_SIZE 256

/* 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_DEVICE_PATH_NAME_MAX	1024
#define BTRFS_SUBVOL_NAME_MAX 		4039

#ifndef __KERNEL__
/* Deprecated since 5.7 */
# define BTRFS_SUBVOL_CREATE_ASYNC	(1ULL << 0)
#endif
#define BTRFS_SUBVOL_RDONLY		(1ULL << 1)
#define BTRFS_SUBVOL_QGROUP_INHERIT	(1ULL << 2)

#define BTRFS_DEVICE_SPEC_BY_ID		(1ULL << 3)

#define BTRFS_SUBVOL_SPEC_BY_ID	(1ULL << 4)

#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED		\
			(BTRFS_SUBVOL_RDONLY |		\
			BTRFS_SUBVOL_QGROUP_INHERIT |	\
			BTRFS_DEVICE_SPEC_BY_ID |	\
			BTRFS_SUBVOL_SPEC_BY_ID)

#define BTRFS_FSID_SIZE 16
#define BTRFS_UUID_SIZE 16
#define BTRFS_UUID_UNPARSED_SIZE	37

/*
 * flags definition for qgroup limits
 *
 * Used by:
 * struct btrfs_qgroup_limit.flags
 * struct btrfs_qgroup_limit_item.flags
 */
#define BTRFS_QGROUP_LIMIT_MAX_RFER	(1ULL << 0)
#define BTRFS_QGROUP_LIMIT_MAX_EXCL	(1ULL << 1)
#define BTRFS_QGROUP_LIMIT_RSV_RFER	(1ULL << 2)
#define BTRFS_QGROUP_LIMIT_RSV_EXCL	(1ULL << 3)
#define BTRFS_QGROUP_LIMIT_RFER_CMPR	(1ULL << 4)
#define BTRFS_QGROUP_LIMIT_EXCL_CMPR	(1ULL << 5)

struct btrfs_qgroup_limit {
	__u64	flags;
	__u64	max_rfer;
	__u64	max_excl;
	__u64	rsv_rfer;
	__u64	rsv_excl;
};

/*
 * flags definition for qgroup inheritance
 *
 * Used by:
 * struct btrfs_qgroup_inherit.flags
 */
#define BTRFS_QGROUP_INHERIT_SET_LIMITS	(1ULL << 0)

struct btrfs_qgroup_inherit {
	__u64	flags;
	__u64	num_qgroups;
	__u64	num_ref_copies;
	__u64	num_excl_copies;
	struct btrfs_qgroup_limit lim;
	__u64	qgroups[0];
};

struct btrfs_ioctl_qgroup_limit_args {
	__u64	qgroupid;
	struct btrfs_qgroup_limit lim;
};

/*
 * Arguments for specification of subvolumes or devices, supporting by-name or
 * by-id and flags
 *
 * The set of supported flags depends on the ioctl
 *
 * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
 * - BTRFS_IOC_SUBVOL_GETFLAGS
 * - BTRFS_IOC_SUBVOL_SETFLAGS
 */

/* Supported flags for BTRFS_IOC_RM_DEV_V2 */
#define BTRFS_DEVICE_REMOVE_ARGS_MASK					\
	(BTRFS_DEVICE_SPEC_BY_ID)

/* Supported flags for BTRFS_IOC_SNAP_CREATE_V2 and BTRFS_IOC_SUBVOL_CREATE_V2 */
#define BTRFS_SUBVOL_CREATE_ARGS_MASK					\
	 (BTRFS_SUBVOL_RDONLY |						\
	 BTRFS_SUBVOL_QGROUP_INHERIT)

/* Supported flags for BTRFS_IOC_SNAP_DESTROY_V2 */
#define BTRFS_SUBVOL_DELETE_ARGS_MASK					\
	(BTRFS_SUBVOL_SPEC_BY_ID)

struct btrfs_ioctl_vol_args_v2 {
	__s64 fd;
	__u64 transid;
	__u64 flags;
	union {
		struct {
			__u64 size;
			struct btrfs_qgroup_inherit __user *qgroup_inherit;
		};
		__u64 unused[4];
	};
	union {
		char name[BTRFS_SUBVOL_NAME_MAX + 1];
		__u64 devid;
		__u64 subvolid;
	};
};

/*
 * 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 occurrences, 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 occurrences 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
#define BTRFS_SCRUB_SUPPORTED_FLAGS	(BTRFS_SCRUB_READONLY)
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_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS	0
#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID	1
struct btrfs_ioctl_dev_replace_start_params {
	__u64 srcdevid;	/* in, if 0, use srcdev_name instead */
	__u64 cont_reading_from_srcdev_mode;	/* in, see #define
						 * above */
	__u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];	/* in */
	__u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1];	/* in */
};

#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED	0
#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED		1
#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED		2
#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED		3
#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED		4
struct btrfs_ioctl_dev_replace_status_params {
	__u64 replace_state;	/* out, see #define above */
	__u64 progress_1000;	/* out, 0 <= x <= 1000 */
	__u64 time_started;	/* out, seconds since 1-Jan-1970 */
	__u64 time_stopped;	/* out, seconds since 1-Jan-1970 */
	__u64 num_write_errors;	/* out */
	__u64 num_uncorrectable_read_errors;	/* out */
};

#define BTRFS_IOCTL_DEV_REPLACE_CMD_START			0
#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS			1
#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL			2
#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR			0
#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED		1
#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED		2
#define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS		3
struct btrfs_ioctl_dev_replace_args {
	__u64 cmd;	/* in */
	__u64 result;	/* out */

union {
		struct btrfs_ioctl_dev_replace_start_params start;
		struct btrfs_ioctl_dev_replace_status_params status;
	};	/* in/out */

__u64 spare[64];
};

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 */
};

/*
 * Retrieve information about the filesystem
 */

/* Request information about checksum type and size */
#define BTRFS_FS_INFO_FLAG_CSUM_INFO			(1 << 0)

/* Request information about filesystem generation */
#define BTRFS_FS_INFO_FLAG_GENERATION			(1 << 1)
/* Request information about filesystem metadata UUID */
#define BTRFS_FS_INFO_FLAG_METADATA_UUID		(1 << 2)

struct btrfs_ioctl_fs_info_args {
	__u64 max_id;				/* out */
	__u64 num_devices;			/* out */
	__u8 fsid[BTRFS_FSID_SIZE];		/* out */
	__u32 nodesize;				/* out */
	__u32 sectorsize;			/* out */
	__u32 clone_alignment;			/* out */
	/* See BTRFS_FS_INFO_FLAG_* */
	__u16 csum_type;			/* out */
	__u16 csum_size;			/* out */
	__u64 flags;				/* in/out */
	__u64 generation;			/* out */
	__u8 metadata_uuid[BTRFS_FSID_SIZE];	/* out */
	__u8 reserved[944];			/* pad to 1k */
};

/*
 * feature flags
 *
 * Used by:
 * struct btrfs_ioctl_feature_flags
 */
#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE		(1ULL << 0)
/*
 * Older kernels (< 4.9) on big-endian systems produced broken free space tree
 * bitmaps, and btrfs-progs also used to corrupt the free space tree (versions
 * < 4.7.3).  If this bit is clear, then the free space tree cannot be trusted.
 * btrfs-progs can also intentionally clear this bit to ask the kernel to
 * rebuild the free space tree, however this might not work on older kernels
 * that do not know about this bit. If not sure, clear the cache manually on
 * first mount when booting older kernel versions.
 */
#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID	(1ULL << 1)
#define BTRFS_FEATURE_COMPAT_RO_VERITY			(1ULL << 2)

#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)
#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)
#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD	(1ULL << 4)

/*
 * older kernels tried to do bigger metadata blocks, but the
 * code was pretty buggy.  Lets not let them try anymore.
 */
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA	(1ULL << 5)

#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF	(1ULL << 6)
#define BTRFS_FEATURE_INCOMPAT_RAID56		(1ULL << 7)
#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	(1ULL << 8)
#define BTRFS_FEATURE_INCOMPAT_NO_HOLES		(1ULL << 9)
#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID	(1ULL << 10)
#define BTRFS_FEATURE_INCOMPAT_RAID1C34		(1ULL << 11)
#define BTRFS_FEATURE_INCOMPAT_ZONED		(1ULL << 12)
#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2	(1ULL << 13)

struct btrfs_ioctl_feature_flags {
	__u64 compat_flags;
	__u64 compat_ro_flags;
	__u64 incompat_flags;
};

/* 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;
	union {
		__u64 usage;
		struct {
			__u32 usage_min;
			__u32 usage_max;
		};
	};
	__u64 devid;
	__u64 pstart;
	__u64 pend;
	__u64 vstart;
	__u64 vend;

__u64 target;

__u64 flags;

/*
	 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
	 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
	 * and maximum
	 */
	union {
		__u64 limit;		/* limit number of processed chunks */
		struct {
			__u32 limit_min;
			__u32 limit_max;
		};
	};

/*
	 * Process chunks that cross stripes_min..stripes_max devices,
	 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
	 */
	__u32 stripes_min;
	__u32 stripes_max;

__u64 unused[6];
} __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 */
};

/*
 * flags definition for balance
 *
 * Restriper's general type filter
 *
 * Used by:
 * btrfs_ioctl_balance_args.flags
 * btrfs_balance_control.flags (internal)
 */
#define BTRFS_BALANCE_DATA		(1ULL << 0)
#define BTRFS_BALANCE_SYSTEM		(1ULL << 1)
#define BTRFS_BALANCE_METADATA		(1ULL << 2)

#define BTRFS_BALANCE_TYPE_MASK		(BTRFS_BALANCE_DATA |	    \
					 BTRFS_BALANCE_SYSTEM |	    \
					 BTRFS_BALANCE_METADATA)

#define BTRFS_BALANCE_FORCE		(1ULL << 3)
#define BTRFS_BALANCE_RESUME		(1ULL << 4)

/*
 * flags definitions for per-type balance args
 *
 * Balance filters
 *
 * Used by:
 * struct btrfs_balance_args
 */
#define BTRFS_BALANCE_ARGS_PROFILES	(1ULL << 0)
#define BTRFS_BALANCE_ARGS_USAGE	(1ULL << 1)
#define BTRFS_BALANCE_ARGS_DEVID	(1ULL << 2)
#define BTRFS_BALANCE_ARGS_DRANGE	(1ULL << 3)
#define BTRFS_BALANCE_ARGS_VRANGE	(1ULL << 4)
#define BTRFS_BALANCE_ARGS_LIMIT	(1ULL << 5)
#define BTRFS_BALANCE_ARGS_LIMIT_RANGE	(1ULL << 6)
#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)
#define BTRFS_BALANCE_ARGS_USAGE_RANGE	(1ULL << 10)

/*
 * Profile changing flags.  When SOFT is set we won't relocate chunk if
 * it already has the target profile (even though it may be
 * half-filled).
 */
#define BTRFS_BALANCE_ARGS_CONVERT	(1ULL << 8)
#define BTRFS_BALANCE_ARGS_SOFT		(1ULL << 9)

/*
 * flags definition for balance state
 *
 * Used by:
 * struct btrfs_ioctl_balance_args.state
 */
#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];
};

#define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)
struct btrfs_ioctl_ino_lookup_user_args {
	/* in, inode number containing the subvolume of 'subvolid' */
	__u64 dirid;
	/* in */
	__u64 treeid;
	/* out, name of the subvolume of 'treeid' */
	char name[BTRFS_VOL_NAME_MAX + 1];
	/*
	 * out, constructed path from the directory with which the ioctl is
	 * called to dirid
	 */
	char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];
};

/* Search criteria for the btrfs SEARCH ioctl family. */
struct btrfs_ioctl_search_key {
	/*
	 * The tree we're searching in. 1 is the tree of tree roots, 2 is the
	 * extent tree, etc...
	 *
	 * A special tree_id value of 0 will cause a search in the subvolume
	 * tree that the inode which is passed to the ioctl is part of.
	 */
	__u64 tree_id;		/* in */

/*
	 * When doing a tree search, we're actually taking a slice from a
	 * linear search space of 136-bit keys.
	 *
	 * A full 136-bit tree key is composed as:
	 *   (objectid << 72) + (type << 64) + offset
	 *
	 * The individual min and max values for objectid, type and offset
	 * define the min_key and max_key values for the search range. All
	 * metadata items with a key in the interval [min_key, max_key] will be
	 * returned.
	 *
	 * Additionally, we can filter the items returned on transaction id of
	 * the metadata block they're stored in by specifying a transid range.
	 * Be aware that this transaction id only denotes when the metadata
	 * page that currently contains the item got written the last time as
	 * result of a COW operation.  The number does not have any meaning
	 * related to the transaction in which an individual item that is being
	 * returned was created or changed.
	 */
	__u64 min_objectid;	/* in */
	__u64 max_objectid;	/* in */
	__u64 min_offset;	/* in */
	__u64 max_offset;	/* in */
	__u64 min_transid;	/* in */
	__u64 max_transid;	/* in */
	__u32 min_type;		/* in */
	__u32 max_type;		/* in */

/*
	 * input: The maximum amount of results desired.
	 * output: The actual amount of items returned, restricted by any of:
	 *  - reaching the upper bound of the search range
	 *  - reaching the input nr_items amount of items
	 *  - completely filling the supplied memory buffer
	 */
	__u32 nr_items;		/* in/out */

/* 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_search_args_v2 {
	struct btrfs_ioctl_search_key key; /* in/out - search parameters */
	__u64 buf_size;		   /* in - size of buffer
					    * out - on EOVERFLOW: needed size
					    *       to store item */
	__u64 buf[0];                       /* out - found items */
};

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

/*
 * flags definition for the defrag range ioctl
 *
 * Used by:
 * struct btrfs_ioctl_defrag_range_args.flags
 */
#define BTRFS_DEFRAG_RANGE_COMPRESS 1
#define BTRFS_DEFRAG_RANGE_START_IO 2
#define BTRFS_DEFRAG_RANGE_FLAGS_SUPP	(BTRFS_DEFRAG_RANGE_COMPRESS |		\
					 BTRFS_DEFRAG_RANGE_START_IO)

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;

/*
	 * which compression method to use if turning on compression
	 * for this defrag operation.  If unspecified, zlib will
	 * be used
	 */
	__u32 compress_type;

/* spare for later */
	__u32 unused[4];
};

#define BTRFS_SAME_DATA_DIFFERS	1
/* For extent-same ioctl */
struct btrfs_ioctl_same_extent_info {
	__s64 fd;		/* in - destination file */
	__u64 logical_offset;	/* in - start of extent in destination */
	__u64 bytes_deduped;	/* out - total # of bytes we were able
				 * to dedupe from this file */
	/* status of this dedupe operation:
	 * 0 if dedup succeeds
	 * < 0 for error
	 * == BTRFS_SAME_DATA_DIFFERS if data differs
	 */
	__s32 status;		/* out - see above description */
	__u32 reserved;
};

struct btrfs_ioctl_same_args {
	__u64 logical_offset;	/* in - start of extent in source */
	__u64 length;		/* in - length of extent */
	__u16 dest_count;	/* in - total elements in info array */
	__u16 reserved1;
	__u32 reserved2;
	struct btrfs_ioctl_same_extent_info info[0];
};

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[3];	/* must be 0 for now */
	__u64				flags;		/* in, v2 only */
	/* struct btrfs_data_container	*inodes;	out   */
	__u64				inodes;
};
/* Return every ref to the extent, not just those containing logical block.
 * Requires logical == extent bytenr. */
#define BTRFS_LOGICAL_INO_ARGS_IGNORE_OFFSET	(1ULL << 0)

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
};

/* Reset statistics after reading; needs SYS_ADMIN capability */
#define	BTRFS_DEV_STATS_RESET		(1ULL << 0)

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

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

/*
	 * This pads the struct to 1032 bytes. It was originally meant to pad to
	 * 1024 bytes, but when adding the flags field, the padding calculation
	 * was not adjusted.
	 */
	__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX];
};

#define BTRFS_QUOTA_CTL_ENABLE	1
#define BTRFS_QUOTA_CTL_DISABLE	2
#define BTRFS_QUOTA_CTL_RESCAN__NOTUSED	3
struct btrfs_ioctl_quota_ctl_args {
	__u64 cmd;
	__u64 status;
};

struct btrfs_ioctl_quota_rescan_args {
	__u64	flags;
	__u64   progress;
	__u64   reserved[6];
};

struct btrfs_ioctl_qgroup_assign_args {
	__u64 assign;
	__u64 src;
	__u64 dst;
};

struct btrfs_ioctl_qgroup_create_args {
	__u64 create;
	__u64 qgroupid;
};
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 */
};

/*
 * Caller doesn't want file data in the send stream, even if the
 * search of clone sources doesn't find an extent. UPDATE_EXTENT
 * commands will be sent instead of WRITE commands.
 */
#define BTRFS_SEND_FLAG_NO_FILE_DATA		0x1

/*
 * Do not add the leading stream header. Used when multiple snapshots
 * are sent back to back.
 */
#define BTRFS_SEND_FLAG_OMIT_STREAM_HEADER	0x2

/*
 * Omit the command at the end of the stream that indicated the end
 * of the stream. This option is used when multiple snapshots are
 * sent back to back.
 */
#define BTRFS_SEND_FLAG_OMIT_END_CMD		0x4

#define BTRFS_SEND_FLAG_MASK \
	(BTRFS_SEND_FLAG_NO_FILE_DATA | \
	 BTRFS_SEND_FLAG_OMIT_STREAM_HEADER | \
	 BTRFS_SEND_FLAG_OMIT_END_CMD)

struct btrfs_ioctl_send_args {
	__s64 send_fd;			/* in */
	__u64 clone_sources_count;	/* in */
	__u64 __user *clone_sources;	/* in */
	__u64 parent_root;		/* in */
	__u64 flags;			/* in */
	__u64 reserved[4];		/* in */
};

/*
 * Information about a fs tree root.
 *
 * All items are filled by the ioctl
 */
struct btrfs_ioctl_get_subvol_info_args {
	/* Id of this subvolume */
	__u64 treeid;

/* Name of this subvolume, used to get the real name at mount point */
	char name[BTRFS_VOL_NAME_MAX + 1];

/*
	 * Id of the subvolume which contains this subvolume.
	 * Zero for top-level subvolume or a deleted subvolume.
	 */
	__u64 parent_id;

/*
	 * Inode number of the directory which contains this subvolume.
	 * Zero for top-level subvolume or a deleted subvolume
	 */
	__u64 dirid;

/* Latest transaction id of this subvolume */
	__u64 generation;

/* Flags of this subvolume */
	__u64 flags;

/* UUID of this subvolume */
	__u8 uuid[BTRFS_UUID_SIZE];

/*
	 * UUID of the subvolume of which this subvolume is a snapshot.
	 * All zero for a non-snapshot subvolume.
	 */
	__u8 parent_uuid[BTRFS_UUID_SIZE];

/*
	 * UUID of the subvolume from which this subvolume was received.
	 * All zero for non-received subvolume.
	 */
	__u8 received_uuid[BTRFS_UUID_SIZE];

/* Transaction id indicating when change/create/send/receive happened */
	__u64 ctransid;
	__u64 otransid;
	__u64 stransid;
	__u64 rtransid;
	/* Time corresponding to c/o/s/rtransid */
	struct btrfs_ioctl_timespec ctime;
	struct btrfs_ioctl_timespec otime;
	struct btrfs_ioctl_timespec stime;
	struct btrfs_ioctl_timespec rtime;

/* Must be zero */
	__u64 reserved[8];
};

#define BTRFS_MAX_ROOTREF_BUFFER_NUM 255
struct btrfs_ioctl_get_subvol_rootref_args {
		/* in/out, minimum id of rootref's treeid to be searched */
		__u64 min_treeid;

/* out */
		struct {
			__u64 treeid;
			__u64 dirid;
		} rootref[BTRFS_MAX_ROOTREF_BUFFER_NUM];

/* out, number of found items */
		__u8 num_items;
		__u8 align[7];
};

/* Error codes as returned by the kernel */
enum btrfs_err_code {
	BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET = 1,
	BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET,
	BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET,
	BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET,
	BTRFS_ERROR_DEV_TGT_REPLACE,
	BTRFS_ERROR_DEV_MISSING_NOT_FOUND,
	BTRFS_ERROR_DEV_ONLY_WRITABLE,
	BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
	BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
	BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
};

#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)
#define BTRFS_IOC_FORGET_DEV _IOW(BTRFS_IOCTL_MAGIC, 5, \
				   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_TREE_SEARCH_V2 _IOWR(BTRFS_IOCTL_MAGIC, 17, \
					   struct btrfs_ioctl_search_args_v2)
#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_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
				   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_logical_ino_args)
#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
				struct btrfs_ioctl_received_subvol_args)
#define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
				     struct btrfs_ioctl_vol_args)
#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
			       struct btrfs_ioctl_quota_ctl_args)
#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
			       struct btrfs_ioctl_qgroup_assign_args)
#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
			       struct btrfs_ioctl_qgroup_create_args)
#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
			       struct btrfs_ioctl_qgroup_limit_args)
#define BTRFS_IOC_QUOTA_RESCAN _IOW(BTRFS_IOCTL_MAGIC, 44, \
			       struct btrfs_ioctl_quota_rescan_args)
#define BTRFS_IOC_QUOTA_RESCAN_STATUS _IOR(BTRFS_IOCTL_MAGIC, 45, \
			       struct btrfs_ioctl_quota_rescan_args)
#define BTRFS_IOC_QUOTA_RESCAN_WAIT _IO(BTRFS_IOCTL_MAGIC, 46)
#define BTRFS_IOC_GET_FSLABEL 	FS_IOC_GETFSLABEL
#define BTRFS_IOC_SET_FSLABEL	FS_IOC_SETFSLABEL
#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
				      struct btrfs_ioctl_get_dev_stats)
#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
				    struct btrfs_ioctl_dev_replace_args)
#define BTRFS_IOC_FILE_EXTENT_SAME _IOWR(BTRFS_IOCTL_MAGIC, 54, \
					 struct btrfs_ioctl_same_args)
#define BTRFS_IOC_GET_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
				   struct btrfs_ioctl_feature_flags)
#define BTRFS_IOC_SET_FEATURES _IOW(BTRFS_IOCTL_MAGIC, 57, \
				   struct btrfs_ioctl_feature_flags[2])
#define BTRFS_IOC_GET_SUPPORTED_FEATURES _IOR(BTRFS_IOCTL_MAGIC, 57, \
				   struct btrfs_ioctl_feature_flags[3])
#define BTRFS_IOC_RM_DEV_V2 _IOW(BTRFS_IOCTL_MAGIC, 58, \
				   struct btrfs_ioctl_vol_args_v2)
#define BTRFS_IOC_LOGICAL_INO_V2 _IOWR(BTRFS_IOCTL_MAGIC, 59, \
					struct btrfs_ioctl_logical_ino_args)
#define BTRFS_IOC_GET_SUBVOL_INFO _IOR(BTRFS_IOCTL_MAGIC, 60, \
				struct btrfs_ioctl_get_subvol_info_args)
#define BTRFS_IOC_GET_SUBVOL_ROOTREF _IOWR(BTRFS_IOCTL_MAGIC, 61, \
				struct btrfs_ioctl_get_subvol_rootref_args)
#define BTRFS_IOC_INO_LOOKUP_USER _IOWR(BTRFS_IOCTL_MAGIC, 62, \
				struct btrfs_ioctl_ino_lookup_user_args)
#define BTRFS_IOC_SNAP_DESTROY_V2 _IOW(BTRFS_IOCTL_MAGIC, 63, \
				struct btrfs_ioctl_vol_args_v2)

#endif /* _UAPI_LINUX_BTRFS_H */

cmd: