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113c1cb530
This is the kernel portion of btrfs send/receive Conflicts: fs/btrfs/Makefile fs/btrfs/backref.h fs/btrfs/ctree.c fs/btrfs/ioctl.c fs/btrfs/ioctl.h Signed-off-by: Chris Mason <chris.mason@fusionio.com>
457 lines
14 KiB
C
457 lines
14 KiB
C
/*
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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 __IOCTL_
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#define __IOCTL_
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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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/* 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_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_FSID_SIZE 16
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#define BTRFS_UUID_SIZE 16
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#define BTRFS_QGROUP_INHERIT_SET_LIMITS (1ULL << 0)
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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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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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#define BTRFS_SUBVOL_NAME_MAX 4039
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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 __user *qgroup_inherit;
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};
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__u64 unused[4];
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};
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char name[BTRFS_SUBVOL_NAME_MAX + 1];
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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_DEVICE_PATH_NAME_MAX 1024
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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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__u64 reserved[124]; /* pad to 1k */
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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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__u64 usage;
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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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__u64 unused[8];
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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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#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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struct btrfs_ioctl_search_key {
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/* which root are we searching. 0 is the tree of tree roots */
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__u64 tree_id;
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/* keys returned will be >= min and <= max */
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__u64 min_objectid;
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__u64 max_objectid;
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/* keys returned will be >= min and <= max */
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__u64 min_offset;
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__u64 max_offset;
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/* max and min transids to search for */
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__u64 min_transid;
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__u64 max_transid;
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/* keys returned will be >= min and <= max */
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__u32 min_type;
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__u32 max_type;
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/*
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* how many items did userland ask for, and how many are we
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* returning
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*/
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__u32 nr_items;
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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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__u64 objectid;
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__u64 offset;
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__u32 type;
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__u32 len;
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};
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#define BTRFS_SEARCH_ARGS_BUFSIZE (4096 - sizeof(struct btrfs_ioctl_search_key))
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/*
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* the buf is an array of search headers where
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* each header is followed by the actual item
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* the type field is expanded to 32 bits for alignment
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*/
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struct btrfs_ioctl_search_args {
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struct btrfs_ioctl_search_key key;
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char buf[BTRFS_SEARCH_ARGS_BUFSIZE];
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};
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struct btrfs_ioctl_clone_range_args {
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__s64 src_fd;
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__u64 src_offset, src_length;
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__u64 dest_offset;
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};
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/* flags for the defrag range ioctl */
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#define BTRFS_DEFRAG_RANGE_COMPRESS 1
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#define BTRFS_DEFRAG_RANGE_START_IO 2
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struct btrfs_ioctl_space_info {
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__u64 flags;
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__u64 total_bytes;
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__u64 used_bytes;
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};
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struct btrfs_ioctl_space_args {
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__u64 space_slots;
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__u64 total_spaces;
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struct btrfs_ioctl_space_info spaces[0];
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};
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struct btrfs_data_container {
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__u32 bytes_left; /* out -- bytes not needed to deliver output */
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__u32 bytes_missing; /* out -- additional bytes needed for result */
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__u32 elem_cnt; /* out */
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__u32 elem_missed; /* out */
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__u64 val[0]; /* out */
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};
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struct btrfs_ioctl_ino_path_args {
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__u64 inum; /* in */
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__u64 size; /* in */
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__u64 reserved[4];
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/* struct btrfs_data_container *fspath; out */
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__u64 fspath; /* out */
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};
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struct btrfs_ioctl_logical_ino_args {
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__u64 logical; /* in */
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__u64 size; /* in */
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__u64 reserved[4];
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/* struct btrfs_data_container *inodes; out */
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__u64 inodes;
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};
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enum btrfs_dev_stat_values {
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/* disk I/O failure stats */
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BTRFS_DEV_STAT_WRITE_ERRS, /* EIO or EREMOTEIO from lower layers */
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BTRFS_DEV_STAT_READ_ERRS, /* EIO or EREMOTEIO from lower layers */
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BTRFS_DEV_STAT_FLUSH_ERRS, /* EIO or EREMOTEIO from lower layers */
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/* stats for indirect indications for I/O failures */
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BTRFS_DEV_STAT_CORRUPTION_ERRS, /* checksum error, bytenr error or
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* contents is illegal: this is an
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* indication that the block was damaged
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* during read or write, or written to
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* wrong location or read from wrong
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* location */
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BTRFS_DEV_STAT_GENERATION_ERRS, /* an indication that blocks have not
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* been written */
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BTRFS_DEV_STAT_VALUES_MAX
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};
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/* Reset statistics after reading; needs SYS_ADMIN capability */
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#define BTRFS_DEV_STATS_RESET (1ULL << 0)
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struct btrfs_ioctl_get_dev_stats {
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__u64 devid; /* in */
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__u64 nr_items; /* in/out */
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__u64 flags; /* in/out */
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/* out values: */
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__u64 values[BTRFS_DEV_STAT_VALUES_MAX];
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__u64 unused[128 - 2 - BTRFS_DEV_STAT_VALUES_MAX]; /* pad to 1k */
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};
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#define BTRFS_QUOTA_CTL_ENABLE 1
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#define BTRFS_QUOTA_CTL_DISABLE 2
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#define BTRFS_QUOTA_CTL_RESCAN 3
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struct btrfs_ioctl_quota_ctl_args {
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__u64 cmd;
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__u64 status;
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};
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struct btrfs_ioctl_qgroup_assign_args {
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__u64 assign;
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__u64 src;
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__u64 dst;
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};
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struct btrfs_ioctl_qgroup_create_args {
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__u64 create;
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__u64 qgroupid;
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};
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struct btrfs_ioctl_timespec {
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__u64 sec;
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__u32 nsec;
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};
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struct btrfs_ioctl_received_subvol_args {
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char uuid[BTRFS_UUID_SIZE]; /* in */
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__u64 stransid; /* in */
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__u64 rtransid; /* out */
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struct btrfs_ioctl_timespec stime; /* in */
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struct btrfs_ioctl_timespec rtime; /* out */
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__u64 flags; /* in */
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__u64 reserved[16]; /* in */
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};
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struct btrfs_ioctl_send_args {
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__s64 send_fd; /* in */
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__u64 clone_sources_count; /* in */
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__u64 __user *clone_sources; /* in */
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__u64 parent_root; /* in */
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__u64 flags; /* in */
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__u64 reserved[4]; /* in */
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};
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#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_RESIZE _IOW(BTRFS_IOCTL_MAGIC, 3, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_SCAN_DEV _IOW(BTRFS_IOCTL_MAGIC, 4, \
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struct btrfs_ioctl_vol_args)
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/* trans start and trans end are dangerous, and only for
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* use by applications that know how to avoid the
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* resulting deadlocks
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*/
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#define BTRFS_IOC_TRANS_START _IO(BTRFS_IOCTL_MAGIC, 6)
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#define BTRFS_IOC_TRANS_END _IO(BTRFS_IOCTL_MAGIC, 7)
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#define BTRFS_IOC_SYNC _IO(BTRFS_IOCTL_MAGIC, 8)
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#define BTRFS_IOC_CLONE _IOW(BTRFS_IOCTL_MAGIC, 9, int)
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#define BTRFS_IOC_ADD_DEV _IOW(BTRFS_IOCTL_MAGIC, 10, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_RM_DEV _IOW(BTRFS_IOCTL_MAGIC, 11, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \
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struct btrfs_ioctl_clone_range_args)
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#define BTRFS_IOC_SUBVOL_CREATE _IOW(BTRFS_IOCTL_MAGIC, 14, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_SNAP_DESTROY _IOW(BTRFS_IOCTL_MAGIC, 15, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_DEFRAG_RANGE _IOW(BTRFS_IOCTL_MAGIC, 16, \
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struct btrfs_ioctl_defrag_range_args)
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#define BTRFS_IOC_TREE_SEARCH _IOWR(BTRFS_IOCTL_MAGIC, 17, \
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struct btrfs_ioctl_search_args)
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#define BTRFS_IOC_INO_LOOKUP _IOWR(BTRFS_IOCTL_MAGIC, 18, \
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struct btrfs_ioctl_ino_lookup_args)
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#define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64)
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#define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \
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struct btrfs_ioctl_space_args)
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#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64)
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#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64)
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#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \
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struct btrfs_ioctl_vol_args_v2)
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#define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \
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struct btrfs_ioctl_vol_args_v2)
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#define BTRFS_IOC_SUBVOL_GETFLAGS _IOR(BTRFS_IOCTL_MAGIC, 25, __u64)
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#define BTRFS_IOC_SUBVOL_SETFLAGS _IOW(BTRFS_IOCTL_MAGIC, 26, __u64)
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#define BTRFS_IOC_SCRUB _IOWR(BTRFS_IOCTL_MAGIC, 27, \
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struct btrfs_ioctl_scrub_args)
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#define BTRFS_IOC_SCRUB_CANCEL _IO(BTRFS_IOCTL_MAGIC, 28)
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#define BTRFS_IOC_SCRUB_PROGRESS _IOWR(BTRFS_IOCTL_MAGIC, 29, \
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struct btrfs_ioctl_scrub_args)
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#define BTRFS_IOC_DEV_INFO _IOWR(BTRFS_IOCTL_MAGIC, 30, \
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struct btrfs_ioctl_dev_info_args)
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#define BTRFS_IOC_FS_INFO _IOR(BTRFS_IOCTL_MAGIC, 31, \
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struct btrfs_ioctl_fs_info_args)
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#define BTRFS_IOC_BALANCE_V2 _IOWR(BTRFS_IOCTL_MAGIC, 32, \
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struct btrfs_ioctl_balance_args)
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#define BTRFS_IOC_BALANCE_CTL _IOW(BTRFS_IOCTL_MAGIC, 33, int)
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#define BTRFS_IOC_BALANCE_PROGRESS _IOR(BTRFS_IOCTL_MAGIC, 34, \
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struct btrfs_ioctl_balance_args)
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#define BTRFS_IOC_INO_PATHS _IOWR(BTRFS_IOCTL_MAGIC, 35, \
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struct btrfs_ioctl_ino_path_args)
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#define BTRFS_IOC_LOGICAL_INO _IOWR(BTRFS_IOCTL_MAGIC, 36, \
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struct btrfs_ioctl_ino_path_args)
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#define BTRFS_IOC_SET_RECEIVED_SUBVOL _IOWR(BTRFS_IOCTL_MAGIC, 37, \
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struct btrfs_ioctl_received_subvol_args)
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#define BTRFS_IOC_SEND _IOW(BTRFS_IOCTL_MAGIC, 38, struct btrfs_ioctl_send_args)
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#define BTRFS_IOC_DEVICES_READY _IOR(BTRFS_IOCTL_MAGIC, 39, \
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struct btrfs_ioctl_vol_args)
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#define BTRFS_IOC_QUOTA_CTL _IOWR(BTRFS_IOCTL_MAGIC, 40, \
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struct btrfs_ioctl_quota_ctl_args)
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#define BTRFS_IOC_QGROUP_ASSIGN _IOW(BTRFS_IOCTL_MAGIC, 41, \
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struct btrfs_ioctl_qgroup_assign_args)
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#define BTRFS_IOC_QGROUP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 42, \
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struct btrfs_ioctl_qgroup_create_args)
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#define BTRFS_IOC_QGROUP_LIMIT _IOR(BTRFS_IOCTL_MAGIC, 43, \
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struct btrfs_ioctl_qgroup_limit_args)
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#define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \
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struct btrfs_ioctl_get_dev_stats)
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#endif
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