v4.19.13 snapshot.
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
new file mode 100644
index 0000000..5ca1d21
--- /dev/null
+++ b/include/uapi/linux/btrfs.h
@@ -0,0 +1,944 @@
+/* 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
+
+#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_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;
+};
+
+/*
+ * flags for subvolumes
+ *
+ * Used by:
+ * struct btrfs_ioctl_vol_args_v2.flags
+ *
+ * BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:
+ * - BTRFS_IOC_SUBVOL_GETFLAGS
+ * - BTRFS_IOC_SUBVOL_SETFLAGS
+ */
+
+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;
+ };
+};
+
+/*
+ * 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 */
+};
+
+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 */
+};
+
+/*
+ * 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)
+
+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];
+
+ __u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
+};
+
+#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
+};
+
+#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_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 _IOR(BTRFS_IOCTL_MAGIC, 49, \
+ char[BTRFS_LABEL_SIZE])
+#define BTRFS_IOC_SET_FSLABEL _IOW(BTRFS_IOCTL_MAGIC, 50, \
+ char[BTRFS_LABEL_SIZE])
+#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)
+
+#endif /* _UAPI_LINUX_BTRFS_H */