/* 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 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_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_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)

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)

#define BTRFS_BALANCE_ARGS_MASK                 \
        (BTRFS_BALANCE_ARGS_PROFILES |          \
         BTRFS_BALANCE_ARGS_USAGE |             \
         BTRFS_BALANCE_ARGS_DEVID |             \
         BTRFS_BALANCE_ARGS_DRANGE |            \
         BTRFS_BALANCE_ARGS_VRANGE |            \
         BTRFS_BALANCE_ARGS_LIMIT |             \
         BTRFS_BALANCE_ARGS_LIMIT_RANGE |       \
         BTRFS_BALANCE_ARGS_STRIPES_RANGE |     \
         BTRFS_BALANCE_ARGS_USAGE_RANGE)

/*
 * 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
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 */