/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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/*

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* Copyright (C) 2007 Oracle. All rights reserved.

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*

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* This program is free software; you can redistribute it and/or

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* modify it under the terms of the GNU General Public

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* License v2 as published by the Free Software Foundation.

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*

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* This program is distributed in the hope that it will be useful,

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* but WITHOUT ANY WARRANTY; without even the implied warranty of

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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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* General Public License for more details.

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*

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* You should have received a copy of the GNU General Public

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* License along with this program; if not, write to the

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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,

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* Boston, MA 021110-1307, USA.

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*/

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#ifndef _LINUX_BTRFS_H

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#define _LINUX_BTRFS_H

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#include <linux/types.h>

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#include <linux/ioctl.h>

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#define BTRFS_IOCTL_MAGIC 0x94

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#define BTRFS_VOL_NAME_MAX 255

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#define BTRFS_LABEL_SIZE 256

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/* this should be 4k */

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#define BTRFS_PATH_NAME_MAX 4087

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struct btrfs_ioctl_vol_args {

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__s64 fd;

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char name[BTRFS_PATH_NAME_MAX + 1];

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};

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#define BTRFS_DEVICE_PATH_NAME_MAX 1024

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#define BTRFS_SUBVOL_NAME_MAX 4039

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#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0)

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#define BTRFS_SUBVOL_RDONLY (1ULL << 1)

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#define BTRFS_SUBVOL_QGROUP_INHERIT (1ULL << 2)

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#define BTRFS_DEVICE_SPEC_BY_ID (1ULL << 3)

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#define BTRFS_VOL_ARG_V2_FLAGS_SUPPORTED \

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(BTRFS_SUBVOL_CREATE_ASYNC | \

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BTRFS_SUBVOL_RDONLY | \

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BTRFS_SUBVOL_QGROUP_INHERIT | \

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BTRFS_DEVICE_SPEC_BY_ID)

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#define BTRFS_FSID_SIZE 16

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#define BTRFS_UUID_SIZE 16

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#define BTRFS_UUID_UNPARSED_SIZE 37

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/*

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* flags definition for qgroup limits

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*

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* Used by:

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* struct btrfs_qgroup_limit.flags

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* struct btrfs_qgroup_limit_item.flags

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*/

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#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)

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#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)

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#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)

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#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)

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#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)

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#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)

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struct btrfs_qgroup_limit {

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__u64 flags;

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__u64 max_rfer;

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__u64 max_excl;

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__u64 rsv_rfer;

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__u64 rsv_excl;

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};

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/*

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* flags definition for qgroup inheritance

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*

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* Used by:

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* struct btrfs_qgroup_inherit.flags

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*/

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#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)

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struct btrfs_qgroup_inherit {

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__u64 flags;

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__u64 num_qgroups;

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__u64 num_ref_copies;

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__u64 num_excl_copies;

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struct btrfs_qgroup_limit lim;

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__u64 qgroups[0];

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};

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struct btrfs_ioctl_qgroup_limit_args {

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__u64 qgroupid;

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struct btrfs_qgroup_limit lim;

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};

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/*

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* flags for subvolumes

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*

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* Used by:

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* struct btrfs_ioctl_vol_args_v2.flags

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*

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* BTRFS_SUBVOL_RDONLY is also provided/consumed by the following ioctls:

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* - BTRFS_IOC_SUBVOL_GETFLAGS

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* - BTRFS_IOC_SUBVOL_SETFLAGS

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*/

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struct btrfs_ioctl_vol_args_v2 {

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__s64 fd;

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__u64 transid;

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__u64 flags;

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union {

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struct {

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__u64 size;

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struct btrfs_qgroup_inherit *qgroup_inherit;

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};

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__u64 unused[4];

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};

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union {

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char name[BTRFS_SUBVOL_NAME_MAX + 1];

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__u64 devid;

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};

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};

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/*

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* structure to report errors and progress to userspace, either as a

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* result of a finished scrub, a canceled scrub or a progress inquiry

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*/

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struct btrfs_scrub_progress {

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__u64 data_extents_scrubbed; /* # of data extents scrubbed */

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__u64 tree_extents_scrubbed; /* # of tree extents scrubbed */

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__u64 data_bytes_scrubbed; /* # of data bytes scrubbed */

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__u64 tree_bytes_scrubbed; /* # of tree bytes scrubbed */

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__u64 read_errors; /* # of read errors encountered (EIO) */

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__u64 csum_errors; /* # of failed csum checks */

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__u64 verify_errors; /* # of occurences, where the metadata

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* of a tree block did not match the

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* expected values, like generation or

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* logical */

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__u64 no_csum; /* # of 4k data block for which no csum

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* is present, probably the result of

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* data written with nodatasum */

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__u64 csum_discards; /* # of csum for which no data was found

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* in the extent tree. */

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__u64 super_errors; /* # of bad super blocks encountered */

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__u64 malloc_errors; /* # of internal kmalloc errors. These

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* will likely cause an incomplete

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* scrub */

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__u64 uncorrectable_errors; /* # of errors where either no intact

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* copy was found or the writeback

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* failed */

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__u64 corrected_errors; /* # of errors corrected */

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__u64 last_physical; /* last physical address scrubbed. In

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* case a scrub was aborted, this can

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* be used to restart the scrub */

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__u64 unverified_errors; /* # of occurences where a read for a

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* full (64k) bio failed, but the re-

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* check succeeded for each 4k piece.

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* Intermittent error. */

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};

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#define BTRFS_SCRUB_READONLY 1

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struct btrfs_ioctl_scrub_args {

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__u64 devid; /* in */

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__u64 start; /* in */

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__u64 end; /* in */

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__u64 flags; /* in */

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struct btrfs_scrub_progress progress; /* out */

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/* pad to 1k */

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__u64 unused[(1024-32-sizeof(struct btrfs_scrub_progress))/8];

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};

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#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0

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#define BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID 1

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struct btrfs_ioctl_dev_replace_start_params {

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__u64 srcdevid; /* in, if 0, use srcdev_name instead */

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__u64 cont_reading_from_srcdev_mode; /* in, see #define

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* above */

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__u8 srcdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */

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__u8 tgtdev_name[BTRFS_DEVICE_PATH_NAME_MAX + 1]; /* in */

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};

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#define BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED 0

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#define BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED 1

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#define BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED 2

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#define BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED 3

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#define BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED 4

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struct btrfs_ioctl_dev_replace_status_params {

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__u64 replace_state; /* out, see #define above */

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__u64 progress_1000; /* out, 0 <= x <= 1000 */

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__u64 time_started; /* out, seconds since 1-Jan-1970 */

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__u64 time_stopped; /* out, seconds since 1-Jan-1970 */

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__u64 num_write_errors; /* out */

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__u64 num_uncorrectable_read_errors; /* out */

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};

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#define BTRFS_IOCTL_DEV_REPLACE_CMD_START 0

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#define BTRFS_IOCTL_DEV_REPLACE_CMD_STATUS 1

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#define BTRFS_IOCTL_DEV_REPLACE_CMD_CANCEL 2

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#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR 0

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#define BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED 1

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#define BTRFS_IOCTL_DEV_REPLACE_RESULT_ALREADY_STARTED 2

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#define BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS 3

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struct btrfs_ioctl_dev_replace_args {

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__u64 cmd; /* in */

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__u64 result; /* out */

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union {

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struct btrfs_ioctl_dev_replace_start_params start;

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struct btrfs_ioctl_dev_replace_status_params status;

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}; /* in/out */

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__u64 spare[64];

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};

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struct btrfs_ioctl_dev_info_args {

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__u64 devid; /* in/out */

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__u8 uuid[BTRFS_UUID_SIZE]; /* in/out */

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__u64 bytes_used; /* out */

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__u64 total_bytes; /* out */

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__u64 unused[379]; /* pad to 4k */

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__u8 path[BTRFS_DEVICE_PATH_NAME_MAX]; /* out */

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};

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struct btrfs_ioctl_fs_info_args {

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__u64 max_id; /* out */

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__u64 num_devices; /* out */

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__u8 fsid[BTRFS_FSID_SIZE]; /* out */

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__u32 nodesize; /* out */

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__u32 sectorsize; /* out */

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__u32 clone_alignment; /* out */

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__u32 reserved32;

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__u64 reserved[122]; /* pad to 1k */

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};

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/*

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* feature flags

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*

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* Used by:

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* struct btrfs_ioctl_feature_flags

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*/

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#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)

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/*

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* Older kernels (< 4.9) on big-endian systems produced broken free space tree

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* bitmaps, and btrfs-progs also used to corrupt the free space tree (versions

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* < 4.7.3). If this bit is clear, then the free space tree cannot be trusted.

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* btrfs-progs can also intentionally clear this bit to ask the kernel to

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* rebuild the free space tree, however this might not work on older kernels

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* that do not know about this bit. If not sure, clear the cache manually on

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* first mount when booting older kernel versions.

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*/

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#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)

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#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)

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#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)

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#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)

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#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)

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#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)

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/*

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* older kernels tried to do bigger metadata blocks, but the

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* code was pretty buggy. Lets not let them try anymore.

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*/

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#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)

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#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)

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#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)

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#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)

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#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)

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struct btrfs_ioctl_feature_flags {

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__u64 compat_flags;

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__u64 compat_ro_flags;

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__u64 incompat_flags;

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};

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/* balance control ioctl modes */

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#define BTRFS_BALANCE_CTL_PAUSE 1

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#define BTRFS_BALANCE_CTL_CANCEL 2

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/*

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* this is packed, because it should be exactly the same as its disk

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* byte order counterpart (struct btrfs_disk_balance_args)

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*/

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struct btrfs_balance_args {

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__u64 profiles;

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union {

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__u64 usage;

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struct {

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__u32 usage_min;

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__u32 usage_max;

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};

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};

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__u64 devid;

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__u64 pstart;

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__u64 pend;

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__u64 vstart;

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__u64 vend;

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__u64 target;

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__u64 flags;

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/*

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* BTRFS_BALANCE_ARGS_LIMIT with value 'limit'

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* BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum

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* and maximum

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*/

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union {

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__u64 limit; /* limit number of processed chunks */

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struct {

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__u32 limit_min;

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__u32 limit_max;

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};

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};

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/*

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* Process chunks that cross stripes_min..stripes_max devices,

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* BTRFS_BALANCE_ARGS_STRIPES_RANGE

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*/

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__u32 stripes_min;

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__u32 stripes_max;

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__u64 unused[6];

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} __attribute__ ((__packed__));

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/* report balance progress to userspace */

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struct btrfs_balance_progress {

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__u64 expected; /* estimated # of chunks that will be

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* relocated to fulfill the request */

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__u64 considered; /* # of chunks we have considered so far */

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__u64 completed; /* # of chunks relocated so far */

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};

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/*

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* flags definition for balance

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*

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* Restriper's general type filter

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*

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* Used by:

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* btrfs_ioctl_balance_args.flags

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* btrfs_balance_control.flags (internal)

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*/

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#define BTRFS_BALANCE_DATA (1ULL << 0)

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#define BTRFS_BALANCE_SYSTEM (1ULL << 1)

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#define BTRFS_BALANCE_METADATA (1ULL << 2)

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#define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \

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BTRFS_BALANCE_SYSTEM | \

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BTRFS_BALANCE_METADATA)

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#define BTRFS_BALANCE_FORCE (1ULL << 3)

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#define BTRFS_BALANCE_RESUME (1ULL << 4)

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/*

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* flags definitions for per-type balance args

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*

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* Balance filters

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*

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* Used by:

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* struct btrfs_balance_args

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*/

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#define BTRFS_BALANCE_ARGS_PROFILES (1ULL << 0)

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#define BTRFS_BALANCE_ARGS_USAGE (1ULL << 1)

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#define BTRFS_BALANCE_ARGS_DEVID (1ULL << 2)

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#define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3)

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#define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4)

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#define BTRFS_BALANCE_ARGS_LIMIT (1ULL << 5)

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#define BTRFS_BALANCE_ARGS_LIMIT_RANGE (1ULL << 6)

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#define BTRFS_BALANCE_ARGS_STRIPES_RANGE (1ULL << 7)

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#define BTRFS_BALANCE_ARGS_USAGE_RANGE (1ULL << 10)

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#define BTRFS_BALANCE_ARGS_MASK \

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(BTRFS_BALANCE_ARGS_PROFILES | \

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BTRFS_BALANCE_ARGS_USAGE | \

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BTRFS_BALANCE_ARGS_DEVID | \

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BTRFS_BALANCE_ARGS_DRANGE | \

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BTRFS_BALANCE_ARGS_VRANGE | \

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BTRFS_BALANCE_ARGS_LIMIT | \

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BTRFS_BALANCE_ARGS_LIMIT_RANGE | \

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BTRFS_BALANCE_ARGS_STRIPES_RANGE | \

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BTRFS_BALANCE_ARGS_USAGE_RANGE)

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/*

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* Profile changing flags. When SOFT is set we won't relocate chunk if

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* it already has the target profile (even though it may be

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* half-filled).

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*/

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#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8)

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#define BTRFS_BALANCE_ARGS_SOFT (1ULL << 9)

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/*

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* flags definition for balance state

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*

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* Used by:

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* struct btrfs_ioctl_balance_args.state

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*/

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#define BTRFS_BALANCE_STATE_RUNNING (1ULL << 0)

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#define BTRFS_BALANCE_STATE_PAUSE_REQ (1ULL << 1)

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#define BTRFS_BALANCE_STATE_CANCEL_REQ (1ULL << 2)

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struct btrfs_ioctl_balance_args {

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__u64 flags; /* in/out */

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__u64 state; /* out */

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struct btrfs_balance_args data; /* in/out */

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struct btrfs_balance_args meta; /* in/out */

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struct btrfs_balance_args sys; /* in/out */

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struct btrfs_balance_progress stat; /* out */

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__u64 unused[72]; /* pad to 1k */

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};

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#define BTRFS_INO_LOOKUP_PATH_MAX 4080

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struct btrfs_ioctl_ino_lookup_args {

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__u64 treeid;

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__u64 objectid;

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char name[BTRFS_INO_LOOKUP_PATH_MAX];

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};

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#define BTRFS_INO_LOOKUP_USER_PATH_MAX (4080 - BTRFS_VOL_NAME_MAX - 1)

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struct btrfs_ioctl_ino_lookup_user_args {

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/* in, inode number containing the subvolume of 'subvolid' */

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__u64 dirid;

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/* in */

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__u64 treeid;

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/* out, name of the subvolume of 'treeid' */

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char name[BTRFS_VOL_NAME_MAX + 1];

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/*

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* out, constructed path from the directory with which the ioctl is

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* called to dirid

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*/

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char path[BTRFS_INO_LOOKUP_USER_PATH_MAX];

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};

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/* Search criteria for the btrfs SEARCH ioctl family. */

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struct btrfs_ioctl_search_key {

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/*

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* The tree we're searching in. 1 is the tree of tree roots, 2 is the

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* extent tree, etc...

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*

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* A special tree_id value of 0 will cause a search in the subvolume

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* tree that the inode which is passed to the ioctl is part of.

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*/

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__u64 tree_id; /* in */

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/*

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* When doing a tree search, we're actually taking a slice from a

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* linear search space of 136-bit keys.

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*

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* A full 136-bit tree key is composed as:

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* (objectid << 72) + (type << 64) + offset

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*

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* The individual min and max values for objectid, type and offset

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* define the min_key and max_key values for the search range. All

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* metadata items with a key in the interval [min_key, max_key] will be

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* returned.

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*

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* Additionally, we can filter the items returned on transaction id of

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* the metadata block they're stored in by specifying a transid range.

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* Be aware that this transaction id only denotes when the metadata

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* page that currently contains the item got written the last time as

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* result of a COW operation. The number does not have any meaning

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* related to the transaction in which an individual item that is being

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* returned was created or changed.

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*/

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__u64 min_objectid; /* in */

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__u64 max_objectid; /* in */

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__u64 min_offset; /* in */

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__u64 max_offset; /* in */

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__u64 min_transid; /* in */

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__u64 max_transid; /* in */

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__u32 min_type; /* in */

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__u32 max_type; /* in */

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/*

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* input: The maximum amount of results desired.

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* output: The actual amount of items returned, restricted by any of:

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* - reaching the upper bound of the search range

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* - reaching the input nr_items amount of items

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* - completely filling the supplied memory buffer

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*/

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__u32 nr_items; /* in/out */

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/* align to 64 bits */

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__u32 unused;

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/* some extra for later */

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__u64 unused1;

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__u64 unused2;

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__u64 unused3;

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__u64 unused4;

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};

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struct btrfs_ioctl_search_header {

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__u64 transid;

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