+BUILD_ASSERT(sizeof(struct btrfs_ioctl_vol_args) == 4096);
+
+#define BTRFS_DEVICE_PATH_NAME_MAX 1024
+
+#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)
+#define BTRFS_SUBVOL_RDONLY (1ULL << 1)
+#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)
+#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)
+
+#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \
+ (BTRFS_SUBVOL_CREATE_ASYNC | \
+ BTRFS_SUBVOL_RDONLY | \
+ BTRFS_SUBVOL_QGROUP_INHERIT | \
+ BTRFS_DEVICE_SPEC_BY_ID)
+
+#define BTRFS_FSID_SIZE 16
+#define BTRFS_UUID_SIZE 16
+
+#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
+
+struct btrfs_qgroup_limit {
+ __u64 flags;
+ __u64 max_referenced;
+ __u64 max_exclusive;
+ __u64 rsv_referenced;
+ __u64 rsv_exclusive;
+};
+BUILD_ASSERT(sizeof(struct btrfs_qgroup_limit) == 40);
+
+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];
+};
+BUILD_ASSERT(sizeof(struct btrfs_qgroup_inherit) == 72);
+
+struct btrfs_ioctl_qgroup_limit_args {
+ __u64 qgroupid;
+ struct btrfs_qgroup_limit lim;
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_qgroup_limit_args) == 48);
+
+#define BTRFS_SUBVOL_NAME_MAX 4039
+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;
+ };
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_vol_args_v2) == 4096);
+
+/*
+ * 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
+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];
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_scrub_args) == 1024);
+
+#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 */
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_dev_replace_start_params) == 2072);
+
+#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 */
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_dev_replace_status_params) == 48);
+
+#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_RESULT -1
+#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];
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_dev_replace_args) == 2600);
+
+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 */
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_dev_info_args) == 4096);
+
+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 */
+ __u32 reserved32;
+ __u64 reserved[122]; /* pad to 1k */
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_fs_info_args) == 1024);
+
+struct btrfs_ioctl_feature_flags {
+ __u64 compat_flags;
+ __u64 compat_ro_flags;
+ __u64 incompat_flags;
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_feature_flags) == 24);
+
+/* balance control ioctl modes */
+#define BTRFS_BALANCE_CTL_PAUSE 1
+#define BTRFS_BALANCE_CTL_CANCEL 2
+#define BTRFS_BALANCE_CTL_RESUME 3
+
+/*
+ * 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;
+
+ /*
+ * usage filter
+ * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
+ * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
+ */
+ 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;
+ };
+ };
+ __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 fulfil 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 */
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_balance_args) == 1024);
+
+#define BTRFS_INO_LOOKUP_PATH_MAX 4080
+struct btrfs_ioctl_ino_lookup_args {
+ __u64 treeid;
+ __u64 objectid;
+ char name[BTRFS_INO_LOOKUP_PATH_MAX];
+};
+BUILD_ASSERT(sizeof(struct btrfs_ioctl_ino_lookup_args) == 4096);