9fe6a50fb7
Removes code no longer used. The sysfs file itself is kept, because the btrfs developers expressed interest in putting new entries to sysfs. Signed-off-by: Maarten Lankhorst <m.b.lankhorst@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2680 lines
86 KiB
C
2680 lines
86 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 __BTRFS_CTREE__
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#define __BTRFS_CTREE__
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#include <linux/version.h>
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#include <linux/mm.h>
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#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/rwsem.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/kobject.h>
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#include <trace/events/btrfs.h>
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#include <asm/kmap_types.h>
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#include "extent_io.h"
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#include "extent_map.h"
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#include "async-thread.h"
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#include "ioctl.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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struct btrfs_pending_snapshot;
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extern struct kmem_cache *btrfs_trans_handle_cachep;
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extern struct kmem_cache *btrfs_transaction_cachep;
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extern struct kmem_cache *btrfs_bit_radix_cachep;
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extern struct kmem_cache *btrfs_path_cachep;
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extern struct kmem_cache *btrfs_free_space_cachep;
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struct btrfs_ordered_sum;
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#define BTRFS_MAGIC "_BHRfS_M"
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#define BTRFS_MAX_LEVEL 8
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#define BTRFS_COMPAT_EXTENT_TREE_V0
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/*
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* files bigger than this get some pre-flushing when they are added
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* to the ordered operations list. That way we limit the total
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* work done by the commit
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*/
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#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
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/* holds pointers to all of the tree roots */
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#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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/* stores information about which extents are in use, and reference counts */
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#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
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/*
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* chunk tree stores translations from logical -> physical block numbering
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* the super block points to the chunk tree
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*/
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#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
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/*
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* stores information about which areas of a given device are in use.
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* one per device. The tree of tree roots points to the device tree
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*/
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#define BTRFS_DEV_TREE_OBJECTID 4ULL
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/* one per subvolume, storing files and directories */
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#define BTRFS_FS_TREE_OBJECTID 5ULL
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/* directory objectid inside the root tree */
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#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
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/* holds checksums of all the data extents */
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#define BTRFS_CSUM_TREE_OBJECTID 7ULL
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/* orhpan objectid for tracking unlinked/truncated files */
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#define BTRFS_ORPHAN_OBJECTID -5ULL
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/* does write ahead logging to speed up fsyncs */
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#define BTRFS_TREE_LOG_OBJECTID -6ULL
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#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
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/* for space balancing */
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#define BTRFS_TREE_RELOC_OBJECTID -8ULL
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#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
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/*
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* extent checksums all have this objectid
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* this allows them to share the logging tree
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* for fsyncs
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*/
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#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
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/* For storing free space cache */
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#define BTRFS_FREE_SPACE_OBJECTID -11ULL
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/*
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* The inode number assigned to the special inode for sotring
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* free ino cache
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*/
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#define BTRFS_FREE_INO_OBJECTID -12ULL
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/* dummy objectid represents multiple objectids */
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#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
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/*
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* All files have objectids in this range.
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*/
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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#define BTRFS_LAST_FREE_OBJECTID -256ULL
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#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
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/*
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* the device items go into the chunk tree. The key is in the form
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* [ 1 BTRFS_DEV_ITEM_KEY device_id ]
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*/
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#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
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#define BTRFS_BTREE_INODE_OBJECTID 1
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#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
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/*
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* we can actually store much bigger names, but lets not confuse the rest
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* of linux
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*/
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#define BTRFS_NAME_LEN 255
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/* 32 bytes in various csum fields */
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#define BTRFS_CSUM_SIZE 32
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/* csum types */
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#define BTRFS_CSUM_TYPE_CRC32 0
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static int btrfs_csum_sizes[] = { 4, 0 };
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/* four bytes for CRC32 */
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#define BTRFS_EMPTY_DIR_SIZE 0
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#define BTRFS_FT_UNKNOWN 0
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#define BTRFS_FT_REG_FILE 1
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#define BTRFS_FT_DIR 2
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#define BTRFS_FT_CHRDEV 3
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#define BTRFS_FT_BLKDEV 4
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#define BTRFS_FT_FIFO 5
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#define BTRFS_FT_SOCK 6
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#define BTRFS_FT_SYMLINK 7
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#define BTRFS_FT_XATTR 8
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#define BTRFS_FT_MAX 9
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/*
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* The key defines the order in the tree, and so it also defines (optimal)
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* block layout.
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*
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* objectid corresponds to the inode number.
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*
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* type tells us things about the object, and is a kind of stream selector.
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* so for a given inode, keys with type of 1 might refer to the inode data,
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* type of 2 may point to file data in the btree and type == 3 may point to
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* extents.
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*
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* offset is the starting byte offset for this key in the stream.
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*
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* btrfs_disk_key is in disk byte order. struct btrfs_key is always
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* in cpu native order. Otherwise they are identical and their sizes
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* should be the same (ie both packed)
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*/
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struct btrfs_disk_key {
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__le64 objectid;
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u8 type;
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__le64 offset;
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} __attribute__ ((__packed__));
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struct btrfs_key {
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u64 objectid;
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u8 type;
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u64 offset;
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} __attribute__ ((__packed__));
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struct btrfs_mapping_tree {
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struct extent_map_tree map_tree;
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};
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struct btrfs_dev_item {
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/* the internal btrfs device id */
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__le64 devid;
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/* size of the device */
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__le64 total_bytes;
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/* bytes used */
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__le64 bytes_used;
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/* optimal io alignment for this device */
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__le32 io_align;
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/* optimal io width for this device */
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__le32 io_width;
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/* minimal io size for this device */
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__le32 sector_size;
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/* type and info about this device */
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__le64 type;
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/* expected generation for this device */
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__le64 generation;
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/*
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* starting byte of this partition on the device,
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* to allow for stripe alignment in the future
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*/
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__le64 start_offset;
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/* grouping information for allocation decisions */
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__le32 dev_group;
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/* seek speed 0-100 where 100 is fastest */
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u8 seek_speed;
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/* bandwidth 0-100 where 100 is fastest */
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u8 bandwidth;
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/* btrfs generated uuid for this device */
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u8 uuid[BTRFS_UUID_SIZE];
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/* uuid of FS who owns this device */
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u8 fsid[BTRFS_UUID_SIZE];
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} __attribute__ ((__packed__));
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struct btrfs_stripe {
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__le64 devid;
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__le64 offset;
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u8 dev_uuid[BTRFS_UUID_SIZE];
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} __attribute__ ((__packed__));
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struct btrfs_chunk {
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/* size of this chunk in bytes */
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__le64 length;
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/* objectid of the root referencing this chunk */
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__le64 owner;
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__le64 stripe_len;
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__le64 type;
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/* optimal io alignment for this chunk */
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__le32 io_align;
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/* optimal io width for this chunk */
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__le32 io_width;
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/* minimal io size for this chunk */
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__le32 sector_size;
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/* 2^16 stripes is quite a lot, a second limit is the size of a single
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* item in the btree
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*/
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__le16 num_stripes;
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/* sub stripes only matter for raid10 */
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__le16 sub_stripes;
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struct btrfs_stripe stripe;
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/* additional stripes go here */
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} __attribute__ ((__packed__));
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#define BTRFS_FREE_SPACE_EXTENT 1
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#define BTRFS_FREE_SPACE_BITMAP 2
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struct btrfs_free_space_entry {
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__le64 offset;
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__le64 bytes;
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u8 type;
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} __attribute__ ((__packed__));
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struct btrfs_free_space_header {
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struct btrfs_disk_key location;
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__le64 generation;
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__le64 num_entries;
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__le64 num_bitmaps;
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} __attribute__ ((__packed__));
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static inline unsigned long btrfs_chunk_item_size(int num_stripes)
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{
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BUG_ON(num_stripes == 0);
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return sizeof(struct btrfs_chunk) +
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sizeof(struct btrfs_stripe) * (num_stripes - 1);
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}
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#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
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#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
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/*
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* File system states
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*/
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/* Errors detected */
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#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
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#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
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#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
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#define BTRFS_BACKREF_REV_MAX 256
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#define BTRFS_BACKREF_REV_SHIFT 56
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#define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
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BTRFS_BACKREF_REV_SHIFT)
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#define BTRFS_OLD_BACKREF_REV 0
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#define BTRFS_MIXED_BACKREF_REV 1
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/*
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* every tree block (leaf or node) starts with this header.
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*/
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struct btrfs_header {
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/* these first four must match the super block */
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u8 csum[BTRFS_CSUM_SIZE];
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u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
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__le64 bytenr; /* which block this node is supposed to live in */
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__le64 flags;
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/* allowed to be different from the super from here on down */
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u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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__le64 generation;
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__le64 owner;
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__le32 nritems;
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u8 level;
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} __attribute__ ((__packed__));
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#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
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sizeof(struct btrfs_header)) / \
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sizeof(struct btrfs_key_ptr))
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#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
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#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
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#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
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sizeof(struct btrfs_item) - \
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sizeof(struct btrfs_file_extent_item))
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#define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
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sizeof(struct btrfs_item) -\
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sizeof(struct btrfs_dir_item))
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/*
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* this is a very generous portion of the super block, giving us
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* room to translate 14 chunks with 3 stripes each.
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*/
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#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
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#define BTRFS_LABEL_SIZE 256
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/*
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* the super block basically lists the main trees of the FS
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* it currently lacks any block count etc etc
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*/
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struct btrfs_super_block {
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u8 csum[BTRFS_CSUM_SIZE];
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/* the first 4 fields must match struct btrfs_header */
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u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
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__le64 bytenr; /* this block number */
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__le64 flags;
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/* allowed to be different from the btrfs_header from here own down */
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__le64 magic;
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__le64 generation;
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__le64 root;
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__le64 chunk_root;
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__le64 log_root;
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/* this will help find the new super based on the log root */
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__le64 log_root_transid;
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__le64 total_bytes;
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__le64 bytes_used;
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__le64 root_dir_objectid;
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__le64 num_devices;
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__le32 sectorsize;
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__le32 nodesize;
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__le32 leafsize;
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__le32 stripesize;
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__le32 sys_chunk_array_size;
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__le64 chunk_root_generation;
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__le64 compat_flags;
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__le64 compat_ro_flags;
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__le64 incompat_flags;
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__le16 csum_type;
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u8 root_level;
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u8 chunk_root_level;
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u8 log_root_level;
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struct btrfs_dev_item dev_item;
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char label[BTRFS_LABEL_SIZE];
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__le64 cache_generation;
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/* future expansion */
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__le64 reserved[31];
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u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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} __attribute__ ((__packed__));
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/*
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* Compat flags that we support. If any incompat flags are set other than the
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* ones specified below then we will fail to mount
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*/
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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_COMPAT_SUPP 0ULL
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#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
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#define BTRFS_FEATURE_INCOMPAT_SUPP \
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(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
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BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
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BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
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BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
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/*
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* A leaf is full of items. offset and size tell us where to find
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* the item in the leaf (relative to the start of the data area)
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*/
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struct btrfs_item {
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struct btrfs_disk_key key;
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__le32 offset;
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__le32 size;
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} __attribute__ ((__packed__));
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/*
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* leaves have an item area and a data area:
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* [item0, item1....itemN] [free space] [dataN...data1, data0]
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*
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* The data is separate from the items to get the keys closer together
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* during searches.
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*/
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struct btrfs_leaf {
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struct btrfs_header header;
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struct btrfs_item items[];
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} __attribute__ ((__packed__));
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/*
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* all non-leaf blocks are nodes, they hold only keys and pointers to
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* other blocks
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*/
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struct btrfs_key_ptr {
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struct btrfs_disk_key key;
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__le64 blockptr;
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__le64 generation;
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} __attribute__ ((__packed__));
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struct btrfs_node {
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struct btrfs_header header;
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struct btrfs_key_ptr ptrs[];
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} __attribute__ ((__packed__));
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/*
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* btrfs_paths remember the path taken from the root down to the leaf.
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* level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
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* to any other levels that are present.
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*
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* The slots array records the index of the item or block pointer
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* used while walking the tree.
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*/
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struct btrfs_path {
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struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
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int slots[BTRFS_MAX_LEVEL];
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/* if there is real range locking, this locks field will change */
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int locks[BTRFS_MAX_LEVEL];
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int reada;
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/* keep some upper locks as we walk down */
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int lowest_level;
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/*
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* set by btrfs_split_item, tells search_slot to keep all locks
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* and to force calls to keep space in the nodes
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*/
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unsigned int search_for_split:1;
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unsigned int keep_locks:1;
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unsigned int skip_locking:1;
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unsigned int leave_spinning:1;
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unsigned int search_commit_root:1;
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};
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/*
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* items in the extent btree are used to record the objectid of the
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* owner of the block and the number of references
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*/
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struct btrfs_extent_item {
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__le64 refs;
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__le64 generation;
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__le64 flags;
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} __attribute__ ((__packed__));
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struct btrfs_extent_item_v0 {
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__le32 refs;
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} __attribute__ ((__packed__));
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#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
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sizeof(struct btrfs_item))
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#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
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#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
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|
|
|
/* following flags only apply to tree blocks */
|
|
|
|
/* use full backrefs for extent pointers in the block */
|
|
#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
|
|
|
|
/*
|
|
* this flag is only used internally by scrub and may be changed at any time
|
|
* it is only declared here to avoid collisions
|
|
*/
|
|
#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
|
|
|
|
struct btrfs_tree_block_info {
|
|
struct btrfs_disk_key key;
|
|
u8 level;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_extent_data_ref {
|
|
__le64 root;
|
|
__le64 objectid;
|
|
__le64 offset;
|
|
__le32 count;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_shared_data_ref {
|
|
__le32 count;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_extent_inline_ref {
|
|
u8 type;
|
|
__le64 offset;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/* old style backrefs item */
|
|
struct btrfs_extent_ref_v0 {
|
|
__le64 root;
|
|
__le64 generation;
|
|
__le64 objectid;
|
|
__le32 count;
|
|
} __attribute__ ((__packed__));
|
|
|
|
|
|
/* dev extents record free space on individual devices. The owner
|
|
* field points back to the chunk allocation mapping tree that allocated
|
|
* the extent. The chunk tree uuid field is a way to double check the owner
|
|
*/
|
|
struct btrfs_dev_extent {
|
|
__le64 chunk_tree;
|
|
__le64 chunk_objectid;
|
|
__le64 chunk_offset;
|
|
__le64 length;
|
|
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_inode_ref {
|
|
__le64 index;
|
|
__le16 name_len;
|
|
/* name goes here */
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_timespec {
|
|
__le64 sec;
|
|
__le32 nsec;
|
|
} __attribute__ ((__packed__));
|
|
|
|
enum btrfs_compression_type {
|
|
BTRFS_COMPRESS_NONE = 0,
|
|
BTRFS_COMPRESS_ZLIB = 1,
|
|
BTRFS_COMPRESS_LZO = 2,
|
|
BTRFS_COMPRESS_TYPES = 2,
|
|
BTRFS_COMPRESS_LAST = 3,
|
|
};
|
|
|
|
struct btrfs_inode_item {
|
|
/* nfs style generation number */
|
|
__le64 generation;
|
|
/* transid that last touched this inode */
|
|
__le64 transid;
|
|
__le64 size;
|
|
__le64 nbytes;
|
|
__le64 block_group;
|
|
__le32 nlink;
|
|
__le32 uid;
|
|
__le32 gid;
|
|
__le32 mode;
|
|
__le64 rdev;
|
|
__le64 flags;
|
|
|
|
/* modification sequence number for NFS */
|
|
__le64 sequence;
|
|
|
|
/*
|
|
* a little future expansion, for more than this we can
|
|
* just grow the inode item and version it
|
|
*/
|
|
__le64 reserved[4];
|
|
struct btrfs_timespec atime;
|
|
struct btrfs_timespec ctime;
|
|
struct btrfs_timespec mtime;
|
|
struct btrfs_timespec otime;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_dir_log_item {
|
|
__le64 end;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_dir_item {
|
|
struct btrfs_disk_key location;
|
|
__le64 transid;
|
|
__le16 data_len;
|
|
__le16 name_len;
|
|
u8 type;
|
|
} __attribute__ ((__packed__));
|
|
|
|
#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
|
|
|
|
struct btrfs_root_item {
|
|
struct btrfs_inode_item inode;
|
|
__le64 generation;
|
|
__le64 root_dirid;
|
|
__le64 bytenr;
|
|
__le64 byte_limit;
|
|
__le64 bytes_used;
|
|
__le64 last_snapshot;
|
|
__le64 flags;
|
|
__le32 refs;
|
|
struct btrfs_disk_key drop_progress;
|
|
u8 drop_level;
|
|
u8 level;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* this is used for both forward and backward root refs
|
|
*/
|
|
struct btrfs_root_ref {
|
|
__le64 dirid;
|
|
__le64 sequence;
|
|
__le16 name_len;
|
|
} __attribute__ ((__packed__));
|
|
|
|
#define BTRFS_FILE_EXTENT_INLINE 0
|
|
#define BTRFS_FILE_EXTENT_REG 1
|
|
#define BTRFS_FILE_EXTENT_PREALLOC 2
|
|
|
|
struct btrfs_file_extent_item {
|
|
/*
|
|
* transaction id that created this extent
|
|
*/
|
|
__le64 generation;
|
|
/*
|
|
* max number of bytes to hold this extent in ram
|
|
* when we split a compressed extent we can't know how big
|
|
* each of the resulting pieces will be. So, this is
|
|
* an upper limit on the size of the extent in ram instead of
|
|
* an exact limit.
|
|
*/
|
|
__le64 ram_bytes;
|
|
|
|
/*
|
|
* 32 bits for the various ways we might encode the data,
|
|
* including compression and encryption. If any of these
|
|
* are set to something a given disk format doesn't understand
|
|
* it is treated like an incompat flag for reading and writing,
|
|
* but not for stat.
|
|
*/
|
|
u8 compression;
|
|
u8 encryption;
|
|
__le16 other_encoding; /* spare for later use */
|
|
|
|
/* are we inline data or a real extent? */
|
|
u8 type;
|
|
|
|
/*
|
|
* disk space consumed by the extent, checksum blocks are included
|
|
* in these numbers
|
|
*/
|
|
__le64 disk_bytenr;
|
|
__le64 disk_num_bytes;
|
|
/*
|
|
* the logical offset in file blocks (no csums)
|
|
* this extent record is for. This allows a file extent to point
|
|
* into the middle of an existing extent on disk, sharing it
|
|
* between two snapshots (useful if some bytes in the middle of the
|
|
* extent have changed
|
|
*/
|
|
__le64 offset;
|
|
/*
|
|
* the logical number of file blocks (no csums included). This
|
|
* always reflects the size uncompressed and without encoding.
|
|
*/
|
|
__le64 num_bytes;
|
|
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_csum_item {
|
|
u8 csum;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/* different types of block groups (and chunks) */
|
|
#define BTRFS_BLOCK_GROUP_DATA (1 << 0)
|
|
#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
|
|
#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
|
|
#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
|
|
#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
|
|
#define BTRFS_BLOCK_GROUP_DUP (1 << 5)
|
|
#define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
|
|
#define BTRFS_NR_RAID_TYPES 5
|
|
|
|
struct btrfs_block_group_item {
|
|
__le64 used;
|
|
__le64 chunk_objectid;
|
|
__le64 flags;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_space_info {
|
|
u64 flags;
|
|
|
|
u64 total_bytes; /* total bytes in the space,
|
|
this doesn't take mirrors into account */
|
|
u64 bytes_used; /* total bytes used,
|
|
this doesn't take mirrors into account */
|
|
u64 bytes_pinned; /* total bytes pinned, will be freed when the
|
|
transaction finishes */
|
|
u64 bytes_reserved; /* total bytes the allocator has reserved for
|
|
current allocations */
|
|
u64 bytes_readonly; /* total bytes that are read only */
|
|
|
|
u64 bytes_may_use; /* number of bytes that may be used for
|
|
delalloc/allocations */
|
|
u64 disk_used; /* total bytes used on disk */
|
|
u64 disk_total; /* total bytes on disk, takes mirrors into
|
|
account */
|
|
|
|
/*
|
|
* we bump reservation progress every time we decrement
|
|
* bytes_reserved. This way people waiting for reservations
|
|
* know something good has happened and they can check
|
|
* for progress. The number here isn't to be trusted, it
|
|
* just shows reclaim activity
|
|
*/
|
|
unsigned long reservation_progress;
|
|
|
|
unsigned int full:1; /* indicates that we cannot allocate any more
|
|
chunks for this space */
|
|
unsigned int chunk_alloc:1; /* set if we are allocating a chunk */
|
|
|
|
unsigned int force_alloc; /* set if we need to force a chunk
|
|
alloc for this space */
|
|
|
|
struct list_head list;
|
|
|
|
/* for block groups in our same type */
|
|
struct list_head block_groups[BTRFS_NR_RAID_TYPES];
|
|
spinlock_t lock;
|
|
struct rw_semaphore groups_sem;
|
|
atomic_t caching_threads;
|
|
};
|
|
|
|
struct btrfs_block_rsv {
|
|
u64 size;
|
|
u64 reserved;
|
|
u64 freed[2];
|
|
struct btrfs_space_info *space_info;
|
|
struct list_head list;
|
|
spinlock_t lock;
|
|
atomic_t usage;
|
|
unsigned int priority:8;
|
|
unsigned int durable:1;
|
|
unsigned int refill_used:1;
|
|
unsigned int full:1;
|
|
};
|
|
|
|
/*
|
|
* free clusters are used to claim free space in relatively large chunks,
|
|
* allowing us to do less seeky writes. They are used for all metadata
|
|
* allocations and data allocations in ssd mode.
|
|
*/
|
|
struct btrfs_free_cluster {
|
|
spinlock_t lock;
|
|
spinlock_t refill_lock;
|
|
struct rb_root root;
|
|
|
|
/* largest extent in this cluster */
|
|
u64 max_size;
|
|
|
|
/* first extent starting offset */
|
|
u64 window_start;
|
|
|
|
struct btrfs_block_group_cache *block_group;
|
|
/*
|
|
* when a cluster is allocated from a block group, we put the
|
|
* cluster onto a list in the block group so that it can
|
|
* be freed before the block group is freed.
|
|
*/
|
|
struct list_head block_group_list;
|
|
};
|
|
|
|
enum btrfs_caching_type {
|
|
BTRFS_CACHE_NO = 0,
|
|
BTRFS_CACHE_STARTED = 1,
|
|
BTRFS_CACHE_FINISHED = 2,
|
|
};
|
|
|
|
enum btrfs_disk_cache_state {
|
|
BTRFS_DC_WRITTEN = 0,
|
|
BTRFS_DC_ERROR = 1,
|
|
BTRFS_DC_CLEAR = 2,
|
|
BTRFS_DC_SETUP = 3,
|
|
BTRFS_DC_NEED_WRITE = 4,
|
|
};
|
|
|
|
struct btrfs_caching_control {
|
|
struct list_head list;
|
|
struct mutex mutex;
|
|
wait_queue_head_t wait;
|
|
struct btrfs_block_group_cache *block_group;
|
|
u64 progress;
|
|
atomic_t count;
|
|
};
|
|
|
|
struct btrfs_block_group_cache {
|
|
struct btrfs_key key;
|
|
struct btrfs_block_group_item item;
|
|
struct btrfs_fs_info *fs_info;
|
|
struct inode *inode;
|
|
spinlock_t lock;
|
|
u64 pinned;
|
|
u64 reserved;
|
|
u64 reserved_pinned;
|
|
u64 bytes_super;
|
|
u64 flags;
|
|
u64 sectorsize;
|
|
unsigned int ro:1;
|
|
unsigned int dirty:1;
|
|
unsigned int iref:1;
|
|
|
|
int disk_cache_state;
|
|
|
|
/* cache tracking stuff */
|
|
int cached;
|
|
struct btrfs_caching_control *caching_ctl;
|
|
u64 last_byte_to_unpin;
|
|
|
|
struct btrfs_space_info *space_info;
|
|
|
|
/* free space cache stuff */
|
|
struct btrfs_free_space_ctl *free_space_ctl;
|
|
|
|
/* block group cache stuff */
|
|
struct rb_node cache_node;
|
|
|
|
/* for block groups in the same raid type */
|
|
struct list_head list;
|
|
|
|
/* usage count */
|
|
atomic_t count;
|
|
|
|
/* List of struct btrfs_free_clusters for this block group.
|
|
* Today it will only have one thing on it, but that may change
|
|
*/
|
|
struct list_head cluster_list;
|
|
};
|
|
|
|
struct reloc_control;
|
|
struct btrfs_device;
|
|
struct btrfs_fs_devices;
|
|
struct btrfs_delayed_root;
|
|
struct btrfs_fs_info {
|
|
u8 fsid[BTRFS_FSID_SIZE];
|
|
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
|
|
struct btrfs_root *extent_root;
|
|
struct btrfs_root *tree_root;
|
|
struct btrfs_root *chunk_root;
|
|
struct btrfs_root *dev_root;
|
|
struct btrfs_root *fs_root;
|
|
struct btrfs_root *csum_root;
|
|
|
|
/* the log root tree is a directory of all the other log roots */
|
|
struct btrfs_root *log_root_tree;
|
|
|
|
spinlock_t fs_roots_radix_lock;
|
|
struct radix_tree_root fs_roots_radix;
|
|
|
|
/* block group cache stuff */
|
|
spinlock_t block_group_cache_lock;
|
|
struct rb_root block_group_cache_tree;
|
|
|
|
struct extent_io_tree freed_extents[2];
|
|
struct extent_io_tree *pinned_extents;
|
|
|
|
/* logical->physical extent mapping */
|
|
struct btrfs_mapping_tree mapping_tree;
|
|
|
|
/*
|
|
* block reservation for extent, checksum, root tree and
|
|
* delayed dir index item
|
|
*/
|
|
struct btrfs_block_rsv global_block_rsv;
|
|
/* block reservation for delay allocation */
|
|
struct btrfs_block_rsv delalloc_block_rsv;
|
|
/* block reservation for metadata operations */
|
|
struct btrfs_block_rsv trans_block_rsv;
|
|
/* block reservation for chunk tree */
|
|
struct btrfs_block_rsv chunk_block_rsv;
|
|
|
|
struct btrfs_block_rsv empty_block_rsv;
|
|
|
|
/* list of block reservations that cross multiple transactions */
|
|
struct list_head durable_block_rsv_list;
|
|
|
|
struct mutex durable_block_rsv_mutex;
|
|
|
|
u64 generation;
|
|
u64 last_trans_committed;
|
|
|
|
/*
|
|
* this is updated to the current trans every time a full commit
|
|
* is required instead of the faster short fsync log commits
|
|
*/
|
|
u64 last_trans_log_full_commit;
|
|
unsigned long mount_opt:20;
|
|
unsigned long compress_type:4;
|
|
u64 max_inline;
|
|
u64 alloc_start;
|
|
struct btrfs_transaction *running_transaction;
|
|
wait_queue_head_t transaction_throttle;
|
|
wait_queue_head_t transaction_wait;
|
|
wait_queue_head_t transaction_blocked_wait;
|
|
wait_queue_head_t async_submit_wait;
|
|
|
|
struct btrfs_super_block super_copy;
|
|
struct btrfs_super_block super_for_commit;
|
|
struct block_device *__bdev;
|
|
struct super_block *sb;
|
|
struct inode *btree_inode;
|
|
struct backing_dev_info bdi;
|
|
struct mutex tree_log_mutex;
|
|
struct mutex transaction_kthread_mutex;
|
|
struct mutex cleaner_mutex;
|
|
struct mutex chunk_mutex;
|
|
struct mutex volume_mutex;
|
|
/*
|
|
* this protects the ordered operations list only while we are
|
|
* processing all of the entries on it. This way we make
|
|
* sure the commit code doesn't find the list temporarily empty
|
|
* because another function happens to be doing non-waiting preflush
|
|
* before jumping into the main commit.
|
|
*/
|
|
struct mutex ordered_operations_mutex;
|
|
struct rw_semaphore extent_commit_sem;
|
|
|
|
struct rw_semaphore cleanup_work_sem;
|
|
|
|
struct rw_semaphore subvol_sem;
|
|
struct srcu_struct subvol_srcu;
|
|
|
|
spinlock_t trans_lock;
|
|
/*
|
|
* the reloc mutex goes with the trans lock, it is taken
|
|
* during commit to protect us from the relocation code
|
|
*/
|
|
struct mutex reloc_mutex;
|
|
|
|
struct list_head trans_list;
|
|
struct list_head hashers;
|
|
struct list_head dead_roots;
|
|
struct list_head caching_block_groups;
|
|
|
|
spinlock_t delayed_iput_lock;
|
|
struct list_head delayed_iputs;
|
|
|
|
atomic_t nr_async_submits;
|
|
atomic_t async_submit_draining;
|
|
atomic_t nr_async_bios;
|
|
atomic_t async_delalloc_pages;
|
|
atomic_t open_ioctl_trans;
|
|
|
|
/*
|
|
* this is used by the balancing code to wait for all the pending
|
|
* ordered extents
|
|
*/
|
|
spinlock_t ordered_extent_lock;
|
|
|
|
/*
|
|
* all of the data=ordered extents pending writeback
|
|
* these can span multiple transactions and basically include
|
|
* every dirty data page that isn't from nodatacow
|
|
*/
|
|
struct list_head ordered_extents;
|
|
|
|
/*
|
|
* all of the inodes that have delalloc bytes. It is possible for
|
|
* this list to be empty even when there is still dirty data=ordered
|
|
* extents waiting to finish IO.
|
|
*/
|
|
struct list_head delalloc_inodes;
|
|
|
|
/*
|
|
* special rename and truncate targets that must be on disk before
|
|
* we're allowed to commit. This is basically the ext3 style
|
|
* data=ordered list.
|
|
*/
|
|
struct list_head ordered_operations;
|
|
|
|
/*
|
|
* there is a pool of worker threads for checksumming during writes
|
|
* and a pool for checksumming after reads. This is because readers
|
|
* can run with FS locks held, and the writers may be waiting for
|
|
* those locks. We don't want ordering in the pending list to cause
|
|
* deadlocks, and so the two are serviced separately.
|
|
*
|
|
* A third pool does submit_bio to avoid deadlocking with the other
|
|
* two
|
|
*/
|
|
struct btrfs_workers generic_worker;
|
|
struct btrfs_workers workers;
|
|
struct btrfs_workers delalloc_workers;
|
|
struct btrfs_workers endio_workers;
|
|
struct btrfs_workers endio_meta_workers;
|
|
struct btrfs_workers endio_meta_write_workers;
|
|
struct btrfs_workers endio_write_workers;
|
|
struct btrfs_workers endio_freespace_worker;
|
|
struct btrfs_workers submit_workers;
|
|
/*
|
|
* fixup workers take dirty pages that didn't properly go through
|
|
* the cow mechanism and make them safe to write. It happens
|
|
* for the sys_munmap function call path
|
|
*/
|
|
struct btrfs_workers fixup_workers;
|
|
struct btrfs_workers delayed_workers;
|
|
struct task_struct *transaction_kthread;
|
|
struct task_struct *cleaner_kthread;
|
|
int thread_pool_size;
|
|
|
|
struct kobject super_kobj;
|
|
struct completion kobj_unregister;
|
|
int do_barriers;
|
|
int closing;
|
|
int log_root_recovering;
|
|
int enospc_unlink;
|
|
int trans_no_join;
|
|
|
|
u64 total_pinned;
|
|
|
|
/* protected by the delalloc lock, used to keep from writing
|
|
* metadata until there is a nice batch
|
|
*/
|
|
u64 dirty_metadata_bytes;
|
|
struct list_head dirty_cowonly_roots;
|
|
|
|
struct btrfs_fs_devices *fs_devices;
|
|
|
|
/*
|
|
* the space_info list is almost entirely read only. It only changes
|
|
* when we add a new raid type to the FS, and that happens
|
|
* very rarely. RCU is used to protect it.
|
|
*/
|
|
struct list_head space_info;
|
|
|
|
struct reloc_control *reloc_ctl;
|
|
|
|
spinlock_t delalloc_lock;
|
|
u64 delalloc_bytes;
|
|
|
|
/* data_alloc_cluster is only used in ssd mode */
|
|
struct btrfs_free_cluster data_alloc_cluster;
|
|
|
|
/* all metadata allocations go through this cluster */
|
|
struct btrfs_free_cluster meta_alloc_cluster;
|
|
|
|
/* auto defrag inodes go here */
|
|
spinlock_t defrag_inodes_lock;
|
|
struct rb_root defrag_inodes;
|
|
atomic_t defrag_running;
|
|
|
|
spinlock_t ref_cache_lock;
|
|
u64 total_ref_cache_size;
|
|
|
|
u64 avail_data_alloc_bits;
|
|
u64 avail_metadata_alloc_bits;
|
|
u64 avail_system_alloc_bits;
|
|
u64 data_alloc_profile;
|
|
u64 metadata_alloc_profile;
|
|
u64 system_alloc_profile;
|
|
|
|
unsigned data_chunk_allocations;
|
|
unsigned metadata_ratio;
|
|
|
|
void *bdev_holder;
|
|
|
|
/* private scrub information */
|
|
struct mutex scrub_lock;
|
|
atomic_t scrubs_running;
|
|
atomic_t scrub_pause_req;
|
|
atomic_t scrubs_paused;
|
|
atomic_t scrub_cancel_req;
|
|
wait_queue_head_t scrub_pause_wait;
|
|
struct rw_semaphore scrub_super_lock;
|
|
int scrub_workers_refcnt;
|
|
struct btrfs_workers scrub_workers;
|
|
|
|
/* filesystem state */
|
|
u64 fs_state;
|
|
|
|
struct btrfs_delayed_root *delayed_root;
|
|
};
|
|
|
|
/*
|
|
* in ram representation of the tree. extent_root is used for all allocations
|
|
* and for the extent tree extent_root root.
|
|
*/
|
|
struct btrfs_root {
|
|
struct extent_buffer *node;
|
|
|
|
struct extent_buffer *commit_root;
|
|
struct btrfs_root *log_root;
|
|
struct btrfs_root *reloc_root;
|
|
|
|
struct btrfs_root_item root_item;
|
|
struct btrfs_key root_key;
|
|
struct btrfs_fs_info *fs_info;
|
|
struct extent_io_tree dirty_log_pages;
|
|
|
|
struct kobject root_kobj;
|
|
struct completion kobj_unregister;
|
|
struct mutex objectid_mutex;
|
|
|
|
spinlock_t accounting_lock;
|
|
struct btrfs_block_rsv *block_rsv;
|
|
|
|
/* free ino cache stuff */
|
|
struct mutex fs_commit_mutex;
|
|
struct btrfs_free_space_ctl *free_ino_ctl;
|
|
enum btrfs_caching_type cached;
|
|
spinlock_t cache_lock;
|
|
wait_queue_head_t cache_wait;
|
|
struct btrfs_free_space_ctl *free_ino_pinned;
|
|
u64 cache_progress;
|
|
struct inode *cache_inode;
|
|
|
|
struct mutex log_mutex;
|
|
wait_queue_head_t log_writer_wait;
|
|
wait_queue_head_t log_commit_wait[2];
|
|
atomic_t log_writers;
|
|
atomic_t log_commit[2];
|
|
unsigned long log_transid;
|
|
unsigned long last_log_commit;
|
|
unsigned long log_batch;
|
|
pid_t log_start_pid;
|
|
bool log_multiple_pids;
|
|
|
|
u64 objectid;
|
|
u64 last_trans;
|
|
|
|
/* data allocations are done in sectorsize units */
|
|
u32 sectorsize;
|
|
|
|
/* node allocations are done in nodesize units */
|
|
u32 nodesize;
|
|
|
|
/* leaf allocations are done in leafsize units */
|
|
u32 leafsize;
|
|
|
|
u32 stripesize;
|
|
|
|
u32 type;
|
|
|
|
u64 highest_objectid;
|
|
|
|
/* btrfs_record_root_in_trans is a multi-step process,
|
|
* and it can race with the balancing code. But the
|
|
* race is very small, and only the first time the root
|
|
* is added to each transaction. So in_trans_setup
|
|
* is used to tell us when more checks are required
|
|
*/
|
|
unsigned long in_trans_setup;
|
|
int ref_cows;
|
|
int track_dirty;
|
|
int in_radix;
|
|
|
|
u64 defrag_trans_start;
|
|
struct btrfs_key defrag_progress;
|
|
struct btrfs_key defrag_max;
|
|
int defrag_running;
|
|
char *name;
|
|
|
|
/* the dirty list is only used by non-reference counted roots */
|
|
struct list_head dirty_list;
|
|
|
|
struct list_head root_list;
|
|
|
|
spinlock_t orphan_lock;
|
|
struct list_head orphan_list;
|
|
struct btrfs_block_rsv *orphan_block_rsv;
|
|
int orphan_item_inserted;
|
|
int orphan_cleanup_state;
|
|
|
|
spinlock_t inode_lock;
|
|
/* red-black tree that keeps track of in-memory inodes */
|
|
struct rb_root inode_tree;
|
|
|
|
/*
|
|
* radix tree that keeps track of delayed nodes of every inode,
|
|
* protected by inode_lock
|
|
*/
|
|
struct radix_tree_root delayed_nodes_tree;
|
|
/*
|
|
* right now this just gets used so that a root has its own devid
|
|
* for stat. It may be used for more later
|
|
*/
|
|
struct super_block anon_super;
|
|
};
|
|
|
|
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];
|
|
};
|
|
|
|
|
|
/*
|
|
* inode items have the data typically returned from stat and store other
|
|
* info about object characteristics. There is one for every file and dir in
|
|
* the FS
|
|
*/
|
|
#define BTRFS_INODE_ITEM_KEY 1
|
|
#define BTRFS_INODE_REF_KEY 12
|
|
#define BTRFS_XATTR_ITEM_KEY 24
|
|
#define BTRFS_ORPHAN_ITEM_KEY 48
|
|
/* reserve 2-15 close to the inode for later flexibility */
|
|
|
|
/*
|
|
* dir items are the name -> inode pointers in a directory. There is one
|
|
* for every name in a directory.
|
|
*/
|
|
#define BTRFS_DIR_LOG_ITEM_KEY 60
|
|
#define BTRFS_DIR_LOG_INDEX_KEY 72
|
|
#define BTRFS_DIR_ITEM_KEY 84
|
|
#define BTRFS_DIR_INDEX_KEY 96
|
|
/*
|
|
* extent data is for file data
|
|
*/
|
|
#define BTRFS_EXTENT_DATA_KEY 108
|
|
|
|
/*
|
|
* extent csums are stored in a separate tree and hold csums for
|
|
* an entire extent on disk.
|
|
*/
|
|
#define BTRFS_EXTENT_CSUM_KEY 128
|
|
|
|
/*
|
|
* root items point to tree roots. They are typically in the root
|
|
* tree used by the super block to find all the other trees
|
|
*/
|
|
#define BTRFS_ROOT_ITEM_KEY 132
|
|
|
|
/*
|
|
* root backrefs tie subvols and snapshots to the directory entries that
|
|
* reference them
|
|
*/
|
|
#define BTRFS_ROOT_BACKREF_KEY 144
|
|
|
|
/*
|
|
* root refs make a fast index for listing all of the snapshots and
|
|
* subvolumes referenced by a given root. They point directly to the
|
|
* directory item in the root that references the subvol
|
|
*/
|
|
#define BTRFS_ROOT_REF_KEY 156
|
|
|
|
/*
|
|
* extent items are in the extent map tree. These record which blocks
|
|
* are used, and how many references there are to each block
|
|
*/
|
|
#define BTRFS_EXTENT_ITEM_KEY 168
|
|
|
|
#define BTRFS_TREE_BLOCK_REF_KEY 176
|
|
|
|
#define BTRFS_EXTENT_DATA_REF_KEY 178
|
|
|
|
#define BTRFS_EXTENT_REF_V0_KEY 180
|
|
|
|
#define BTRFS_SHARED_BLOCK_REF_KEY 182
|
|
|
|
#define BTRFS_SHARED_DATA_REF_KEY 184
|
|
|
|
/*
|
|
* block groups give us hints into the extent allocation trees. Which
|
|
* blocks are free etc etc
|
|
*/
|
|
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
|
|
|
|
#define BTRFS_DEV_EXTENT_KEY 204
|
|
#define BTRFS_DEV_ITEM_KEY 216
|
|
#define BTRFS_CHUNK_ITEM_KEY 228
|
|
|
|
/*
|
|
* string items are for debugging. They just store a short string of
|
|
* data in the FS
|
|
*/
|
|
#define BTRFS_STRING_ITEM_KEY 253
|
|
|
|
#define BTRFS_MOUNT_NODATASUM (1 << 0)
|
|
#define BTRFS_MOUNT_NODATACOW (1 << 1)
|
|
#define BTRFS_MOUNT_NOBARRIER (1 << 2)
|
|
#define BTRFS_MOUNT_SSD (1 << 3)
|
|
#define BTRFS_MOUNT_DEGRADED (1 << 4)
|
|
#define BTRFS_MOUNT_COMPRESS (1 << 5)
|
|
#define BTRFS_MOUNT_NOTREELOG (1 << 6)
|
|
#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7)
|
|
#define BTRFS_MOUNT_SSD_SPREAD (1 << 8)
|
|
#define BTRFS_MOUNT_NOSSD (1 << 9)
|
|
#define BTRFS_MOUNT_DISCARD (1 << 10)
|
|
#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11)
|
|
#define BTRFS_MOUNT_SPACE_CACHE (1 << 12)
|
|
#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13)
|
|
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
|
|
#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
|
|
#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
|
|
#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
|
|
|
|
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
|
|
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
|
|
#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
|
|
BTRFS_MOUNT_##opt)
|
|
/*
|
|
* Inode flags
|
|
*/
|
|
#define BTRFS_INODE_NODATASUM (1 << 0)
|
|
#define BTRFS_INODE_NODATACOW (1 << 1)
|
|
#define BTRFS_INODE_READONLY (1 << 2)
|
|
#define BTRFS_INODE_NOCOMPRESS (1 << 3)
|
|
#define BTRFS_INODE_PREALLOC (1 << 4)
|
|
#define BTRFS_INODE_SYNC (1 << 5)
|
|
#define BTRFS_INODE_IMMUTABLE (1 << 6)
|
|
#define BTRFS_INODE_APPEND (1 << 7)
|
|
#define BTRFS_INODE_NODUMP (1 << 8)
|
|
#define BTRFS_INODE_NOATIME (1 << 9)
|
|
#define BTRFS_INODE_DIRSYNC (1 << 10)
|
|
#define BTRFS_INODE_COMPRESS (1 << 11)
|
|
|
|
#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
|
|
|
|
/* some macros to generate set/get funcs for the struct fields. This
|
|
* assumes there is a lefoo_to_cpu for every type, so lets make a simple
|
|
* one for u8:
|
|
*/
|
|
#define le8_to_cpu(v) (v)
|
|
#define cpu_to_le8(v) (v)
|
|
#define __le8 u8
|
|
|
|
#define read_eb_member(eb, ptr, type, member, result) ( \
|
|
read_extent_buffer(eb, (char *)(result), \
|
|
((unsigned long)(ptr)) + \
|
|
offsetof(type, member), \
|
|
sizeof(((type *)0)->member)))
|
|
|
|
#define write_eb_member(eb, ptr, type, member, result) ( \
|
|
write_extent_buffer(eb, (char *)(result), \
|
|
((unsigned long)(ptr)) + \
|
|
offsetof(type, member), \
|
|
sizeof(((type *)0)->member)))
|
|
|
|
#ifndef BTRFS_SETGET_FUNCS
|
|
#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
|
|
u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
|
|
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
|
|
#endif
|
|
|
|
#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
|
|
static inline u##bits btrfs_##name(struct extent_buffer *eb) \
|
|
{ \
|
|
type *p = kmap_atomic(eb->first_page, KM_USER0); \
|
|
u##bits res = le##bits##_to_cpu(p->member); \
|
|
kunmap_atomic(p, KM_USER0); \
|
|
return res; \
|
|
} \
|
|
static inline void btrfs_set_##name(struct extent_buffer *eb, \
|
|
u##bits val) \
|
|
{ \
|
|
type *p = kmap_atomic(eb->first_page, KM_USER0); \
|
|
p->member = cpu_to_le##bits(val); \
|
|
kunmap_atomic(p, KM_USER0); \
|
|
}
|
|
|
|
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
|
|
static inline u##bits btrfs_##name(type *s) \
|
|
{ \
|
|
return le##bits##_to_cpu(s->member); \
|
|
} \
|
|
static inline void btrfs_set_##name(type *s, u##bits val) \
|
|
{ \
|
|
s->member = cpu_to_le##bits(val); \
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
|
|
BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
|
|
BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
|
|
BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
|
|
BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
|
|
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
|
|
start_offset, 64);
|
|
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
|
|
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
|
|
BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
|
|
BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
|
|
BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
|
|
BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
|
|
total_bytes, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
|
|
bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
|
|
io_align, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
|
|
io_width, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
|
|
sector_size, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
|
|
dev_group, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
|
|
seek_speed, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
|
|
bandwidth, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
|
|
generation, 64);
|
|
|
|
static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
|
|
{
|
|
return (char *)d + offsetof(struct btrfs_dev_item, uuid);
|
|
}
|
|
|
|
static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
|
|
{
|
|
return (char *)d + offsetof(struct btrfs_dev_item, fsid);
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
|
|
BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
|
|
BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
|
|
BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
|
|
BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
|
|
BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
|
|
BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
|
|
BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
|
|
BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
|
|
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
|
|
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
|
|
|
|
static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
|
|
{
|
|
return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
|
|
}
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
|
|
stripe_len, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
|
|
io_align, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
|
|
io_width, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
|
|
sector_size, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
|
|
num_stripes, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
|
|
sub_stripes, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
|
|
|
|
static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
|
|
int nr)
|
|
{
|
|
unsigned long offset = (unsigned long)c;
|
|
offset += offsetof(struct btrfs_chunk, stripe);
|
|
offset += nr * sizeof(struct btrfs_stripe);
|
|
return (struct btrfs_stripe *)offset;
|
|
}
|
|
|
|
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
|
|
{
|
|
return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
|
|
}
|
|
|
|
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
|
|
struct btrfs_chunk *c, int nr)
|
|
{
|
|
return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
|
|
}
|
|
|
|
static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
|
|
struct btrfs_chunk *c, int nr)
|
|
{
|
|
return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
|
|
}
|
|
|
|
/* struct btrfs_block_group_item */
|
|
BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
|
|
struct btrfs_block_group_item, chunk_objectid, 64);
|
|
|
|
BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
|
|
struct btrfs_block_group_item, chunk_objectid, 64);
|
|
BTRFS_SETGET_FUNCS(disk_block_group_flags,
|
|
struct btrfs_block_group_item, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(block_group_flags,
|
|
struct btrfs_block_group_item, flags, 64);
|
|
|
|
/* struct btrfs_inode_ref */
|
|
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
|
|
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
|
|
|
|
/* struct btrfs_inode_item */
|
|
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
|
|
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
|
|
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
|
|
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
|
|
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
|
|
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
|
|
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
|
|
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
|
|
BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
|
|
BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
|
|
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
|
|
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
|
|
|
|
static inline struct btrfs_timespec *
|
|
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, atime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_timespec *
|
|
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, mtime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_timespec *
|
|
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, ctime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
|
|
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
|
|
|
|
/* struct btrfs_dev_extent */
|
|
BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
|
|
chunk_tree, 64);
|
|
BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
|
|
chunk_objectid, 64);
|
|
BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
|
|
chunk_offset, 64);
|
|
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
|
|
|
|
static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
|
|
return (u8 *)((unsigned long)dev + ptr);
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
|
|
BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
|
|
|
|
BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
|
|
|
|
|
|
BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
|
|
|
|
static inline void btrfs_tree_block_key(struct extent_buffer *eb,
|
|
struct btrfs_tree_block_info *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
|
|
}
|
|
|
|
static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
|
|
struct btrfs_tree_block_info *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
|
|
root, 64);
|
|
BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
|
|
objectid, 64);
|
|
BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
|
|
offset, 64);
|
|
BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
|
|
count, 32);
|
|
|
|
BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
|
|
count, 32);
|
|
|
|
BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
|
|
type, 8);
|
|
BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
|
|
offset, 64);
|
|
|
|
static inline u32 btrfs_extent_inline_ref_size(int type)
|
|
{
|
|
if (type == BTRFS_TREE_BLOCK_REF_KEY ||
|
|
type == BTRFS_SHARED_BLOCK_REF_KEY)
|
|
return sizeof(struct btrfs_extent_inline_ref);
|
|
if (type == BTRFS_SHARED_DATA_REF_KEY)
|
|
return sizeof(struct btrfs_shared_data_ref) +
|
|
sizeof(struct btrfs_extent_inline_ref);
|
|
if (type == BTRFS_EXTENT_DATA_REF_KEY)
|
|
return sizeof(struct btrfs_extent_data_ref) +
|
|
offsetof(struct btrfs_extent_inline_ref, offset);
|
|
BUG();
|
|
return 0;
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
|
|
BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
|
|
BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
|
|
|
|
/* struct btrfs_node */
|
|
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
|
|
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
|
|
|
|
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
|
|
}
|
|
|
|
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
|
|
}
|
|
|
|
static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
|
|
}
|
|
|
|
static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
|
|
}
|
|
|
|
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
|
|
{
|
|
return offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
}
|
|
|
|
void btrfs_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr);
|
|
|
|
static inline void btrfs_set_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
unsigned long ptr;
|
|
ptr = btrfs_node_key_ptr_offset(nr);
|
|
write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
|
|
struct btrfs_key_ptr, key, disk_key);
|
|
}
|
|
|
|
/* struct btrfs_item */
|
|
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
|
|
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
|
|
|
|
static inline unsigned long btrfs_item_nr_offset(int nr)
|
|
{
|
|
return offsetof(struct btrfs_leaf, items) +
|
|
sizeof(struct btrfs_item) * nr;
|
|
}
|
|
|
|
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
|
|
int nr)
|
|
{
|
|
return (struct btrfs_item *)btrfs_item_nr_offset(nr);
|
|
}
|
|
|
|
static inline u32 btrfs_item_end(struct extent_buffer *eb,
|
|
struct btrfs_item *item)
|
|
{
|
|
return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
|
|
}
|
|
|
|
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
|
|
}
|
|
|
|
static inline void btrfs_item_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
struct btrfs_item *item = btrfs_item_nr(eb, nr);
|
|
read_eb_member(eb, item, struct btrfs_item, key, disk_key);
|
|
}
|
|
|
|
static inline void btrfs_set_item_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
struct btrfs_item *item = btrfs_item_nr(eb, nr);
|
|
write_eb_member(eb, item, struct btrfs_item, key, disk_key);
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
|
|
|
|
/*
|
|
* struct btrfs_root_ref
|
|
*/
|
|
BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
|
|
BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
|
|
BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
|
|
|
|
/* struct btrfs_dir_item */
|
|
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
|
|
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
|
|
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
|
|
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
|
|
|
|
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
read_eb_member(eb, item, struct btrfs_dir_item, location, key);
|
|
}
|
|
|
|
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
write_eb_member(eb, item, struct btrfs_dir_item, location, key);
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
|
|
num_entries, 64);
|
|
BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
|
|
num_bitmaps, 64);
|
|
BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
|
|
generation, 64);
|
|
|
|
static inline void btrfs_free_space_key(struct extent_buffer *eb,
|
|
struct btrfs_free_space_header *h,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
|
|
}
|
|
|
|
static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
|
|
struct btrfs_free_space_header *h,
|
|
struct btrfs_disk_key *key)
|
|
{
|
|
write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
|
|
}
|
|
|
|
/* struct btrfs_disk_key */
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
|
|
objectid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
|
|
|
|
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
|
|
struct btrfs_disk_key *disk)
|
|
{
|
|
cpu->offset = le64_to_cpu(disk->offset);
|
|
cpu->type = disk->type;
|
|
cpu->objectid = le64_to_cpu(disk->objectid);
|
|
}
|
|
|
|
static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
|
|
struct btrfs_key *cpu)
|
|
{
|
|
disk->offset = cpu_to_le64(cpu->offset);
|
|
disk->type = cpu->type;
|
|
disk->objectid = cpu_to_le64(cpu->objectid);
|
|
}
|
|
|
|
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_key *key, int nr)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_node_key(eb, &disk_key, nr);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_key *key, int nr)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_item_key(eb, &disk_key, nr);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
|
|
struct btrfs_dir_item *item,
|
|
struct btrfs_key *key)
|
|
{
|
|
struct btrfs_disk_key disk_key;
|
|
btrfs_dir_item_key(eb, item, &disk_key);
|
|
btrfs_disk_key_to_cpu(key, &disk_key);
|
|
}
|
|
|
|
|
|
static inline u8 btrfs_key_type(struct btrfs_key *key)
|
|
{
|
|
return key->type;
|
|
}
|
|
|
|
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
|
|
{
|
|
key->type = val;
|
|
}
|
|
|
|
/* struct btrfs_header */
|
|
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
|
|
generation, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
|
|
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
|
|
|
|
static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
|
|
{
|
|
return (btrfs_header_flags(eb) & flag) == flag;
|
|
}
|
|
|
|
static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
|
|
{
|
|
u64 flags = btrfs_header_flags(eb);
|
|
btrfs_set_header_flags(eb, flags | flag);
|
|
return (flags & flag) == flag;
|
|
}
|
|
|
|
static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
|
|
{
|
|
u64 flags = btrfs_header_flags(eb);
|
|
btrfs_set_header_flags(eb, flags & ~flag);
|
|
return (flags & flag) == flag;
|
|
}
|
|
|
|
static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
|
|
{
|
|
u64 flags = btrfs_header_flags(eb);
|
|
return flags >> BTRFS_BACKREF_REV_SHIFT;
|
|
}
|
|
|
|
static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
|
|
int rev)
|
|
{
|
|
u64 flags = btrfs_header_flags(eb);
|
|
flags &= ~BTRFS_BACKREF_REV_MASK;
|
|
flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
|
|
btrfs_set_header_flags(eb, flags);
|
|
}
|
|
|
|
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_header, fsid);
|
|
return (u8 *)ptr;
|
|
}
|
|
|
|
static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
|
|
return (u8 *)ptr;
|
|
}
|
|
|
|
static inline int btrfs_is_leaf(struct extent_buffer *eb)
|
|
{
|
|
return btrfs_header_level(eb) == 0;
|
|
}
|
|
|
|
/* struct btrfs_root_item */
|
|
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
|
|
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
|
|
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
|
|
last_snapshot, 64);
|
|
|
|
static inline bool btrfs_root_readonly(struct btrfs_root *root)
|
|
{
|
|
return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
|
|
}
|
|
|
|
/* struct btrfs_super_block */
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
|
|
generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
|
|
struct btrfs_super_block, sys_chunk_array_size, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
|
|
struct btrfs_super_block, chunk_root_generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
|
|
root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
|
|
chunk_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
|
|
chunk_root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
|
|
log_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
|
|
log_root_transid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
|
|
log_root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
|
|
total_bytes, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
|
|
bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
|
|
sectorsize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
|
|
nodesize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
|
|
leafsize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
|
|
stripesize, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
|
|
root_dir_objectid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
|
|
num_devices, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
|
|
compat_flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
|
|
compat_ro_flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
|
|
incompat_flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
|
|
csum_type, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
|
|
cache_generation, 64);
|
|
|
|
static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
|
|
{
|
|
int t = btrfs_super_csum_type(s);
|
|
BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
|
|
return btrfs_csum_sizes[t];
|
|
}
|
|
|
|
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
|
|
{
|
|
return offsetof(struct btrfs_leaf, items);
|
|
}
|
|
|
|
/* struct btrfs_file_extent_item */
|
|
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
|
|
|
|
static inline unsigned long
|
|
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
|
|
{
|
|
unsigned long offset = (unsigned long)e;
|
|
offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
|
|
return offset;
|
|
}
|
|
|
|
static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
|
|
{
|
|
return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
|
|
}
|
|
|
|
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
|
|
disk_bytenr, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
|
|
disk_num_bytes, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
|
|
offset, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
|
|
num_bytes, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
|
|
ram_bytes, 64);
|
|
BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
|
|
compression, 8);
|
|
BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
|
|
encryption, 8);
|
|
BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
|
|
other_encoding, 16);
|
|
|
|
/* this returns the number of file bytes represented by the inline item.
|
|
* If an item is compressed, this is the uncompressed size
|
|
*/
|
|
static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
|
|
struct btrfs_file_extent_item *e)
|
|
{
|
|
return btrfs_file_extent_ram_bytes(eb, e);
|
|
}
|
|
|
|
/*
|
|
* this returns the number of bytes used by the item on disk, minus the
|
|
* size of any extent headers. If a file is compressed on disk, this is
|
|
* the compressed size
|
|
*/
|
|
static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
|
|
struct btrfs_item *e)
|
|
{
|
|
unsigned long offset;
|
|
offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
|
|
return btrfs_item_size(eb, e) - offset;
|
|
}
|
|
|
|
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
|
|
{
|
|
return sb->s_fs_info;
|
|
}
|
|
|
|
static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
|
|
{
|
|
if (level == 0)
|
|
return root->leafsize;
|
|
return root->nodesize;
|
|
}
|
|
|
|
/* helper function to cast into the data area of the leaf. */
|
|
#define btrfs_item_ptr(leaf, slot, type) \
|
|
((type *)(btrfs_leaf_data(leaf) + \
|
|
btrfs_item_offset_nr(leaf, slot)))
|
|
|
|
#define btrfs_item_ptr_offset(leaf, slot) \
|
|
((unsigned long)(btrfs_leaf_data(leaf) + \
|
|
btrfs_item_offset_nr(leaf, slot)))
|
|
|
|
static inline struct dentry *fdentry(struct file *file)
|
|
{
|
|
return file->f_path.dentry;
|
|
}
|
|
|
|
static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
|
|
{
|
|
return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
|
|
(space_info->flags & BTRFS_BLOCK_GROUP_DATA));
|
|
}
|
|
|
|
/* extent-tree.c */
|
|
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
|
|
int num_items)
|
|
{
|
|
return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
|
|
3 * num_items;
|
|
}
|
|
|
|
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
|
|
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, unsigned long count);
|
|
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
|
|
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 bytenr,
|
|
u64 num_bytes, u64 *refs, u64 *flags);
|
|
int btrfs_pin_extent(struct btrfs_root *root,
|
|
u64 bytenr, u64 num, int reserved);
|
|
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 objectid, u64 offset, u64 bytenr);
|
|
struct btrfs_block_group_cache *btrfs_lookup_block_group(
|
|
struct btrfs_fs_info *info,
|
|
u64 bytenr);
|
|
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
|
|
u64 btrfs_find_block_group(struct btrfs_root *root,
|
|
u64 search_start, u64 search_hint, int owner);
|
|
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u32 blocksize,
|
|
u64 parent, u64 root_objectid,
|
|
struct btrfs_disk_key *key, int level,
|
|
u64 hint, u64 empty_size);
|
|
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct extent_buffer *buf,
|
|
u64 parent, int last_ref);
|
|
struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 bytenr, u32 blocksize,
|
|
int level);
|
|
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 root_objectid, u64 owner,
|
|
u64 offset, struct btrfs_key *ins);
|
|
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 root_objectid, u64 owner, u64 offset,
|
|
struct btrfs_key *ins);
|
|
int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 num_bytes, u64 min_alloc_size,
|
|
u64 empty_size, u64 hint_byte,
|
|
u64 search_end, struct btrfs_key *ins,
|
|
u64 data);
|
|
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct extent_buffer *buf, int full_backref);
|
|
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct extent_buffer *buf, int full_backref);
|
|
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 bytenr, u64 num_bytes, u64 flags,
|
|
int is_data);
|
|
int btrfs_free_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 bytenr, u64 num_bytes, u64 parent,
|
|
u64 root_objectid, u64 owner, u64 offset);
|
|
|
|
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
|
|
int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
|
|
u64 num_bytes, int reserve, int sinfo);
|
|
int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 bytenr, u64 num_bytes, u64 parent,
|
|
u64 root_objectid, u64 owner, u64 offset);
|
|
|
|
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
|
|
int btrfs_free_block_groups(struct btrfs_fs_info *info);
|
|
int btrfs_read_block_groups(struct btrfs_root *root);
|
|
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
|
|
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 bytes_used,
|
|
u64 type, u64 chunk_objectid, u64 chunk_offset,
|
|
u64 size);
|
|
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 group_start);
|
|
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
|
|
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
|
|
void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
|
|
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
|
|
int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
|
|
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
|
|
int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
int num_items);
|
|
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
|
|
struct inode *inode);
|
|
void btrfs_orphan_release_metadata(struct inode *inode);
|
|
int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
|
|
struct btrfs_pending_snapshot *pending);
|
|
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
|
|
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
|
|
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
|
|
void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
|
|
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
|
|
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
|
|
void btrfs_free_block_rsv(struct btrfs_root *root,
|
|
struct btrfs_block_rsv *rsv);
|
|
void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_block_rsv *rsv);
|
|
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_block_rsv *block_rsv,
|
|
u64 num_bytes);
|
|
int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_block_rsv *block_rsv,
|
|
u64 min_reserved, int min_factor);
|
|
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
|
|
struct btrfs_block_rsv *dst_rsv,
|
|
u64 num_bytes);
|
|
void btrfs_block_rsv_release(struct btrfs_root *root,
|
|
struct btrfs_block_rsv *block_rsv,
|
|
u64 num_bytes);
|
|
int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_block_rsv *rsv);
|
|
int btrfs_set_block_group_ro(struct btrfs_root *root,
|
|
struct btrfs_block_group_cache *cache);
|
|
int btrfs_set_block_group_rw(struct btrfs_root *root,
|
|
struct btrfs_block_group_cache *cache);
|
|
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
|
|
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
|
|
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
|
|
u64 start, u64 end);
|
|
int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
|
|
u64 num_bytes, u64 *actual_bytes);
|
|
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 type);
|
|
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
|
|
|
|
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
|
|
/* ctree.c */
|
|
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
|
|
int level, int *slot);
|
|
int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
|
|
int btrfs_previous_item(struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 min_objectid,
|
|
int type);
|
|
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_path *path,
|
|
struct btrfs_key *new_key);
|
|
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
|
|
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
|
|
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
|
|
struct btrfs_key *key, int lowest_level,
|
|
int cache_only, u64 min_trans);
|
|
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
|
|
struct btrfs_key *max_key,
|
|
struct btrfs_path *path, int cache_only,
|
|
u64 min_trans);
|
|
int btrfs_cow_block(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct extent_buffer *buf,
|
|
struct extent_buffer *parent, int parent_slot,
|
|
struct extent_buffer **cow_ret);
|
|
int btrfs_copy_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct extent_buffer *buf,
|
|
struct extent_buffer **cow_ret, u64 new_root_objectid);
|
|
int btrfs_block_can_be_shared(struct btrfs_root *root,
|
|
struct extent_buffer *buf);
|
|
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path, u32 data_size);
|
|
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
u32 new_size, int from_end);
|
|
int btrfs_split_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_key *new_key,
|
|
unsigned long split_offset);
|
|
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_key *new_key);
|
|
int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_path *p, int
|
|
ins_len, int cow);
|
|
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct extent_buffer *parent,
|
|
int start_slot, int cache_only, u64 *last_ret,
|
|
struct btrfs_key *progress);
|
|
void btrfs_release_path(struct btrfs_path *p);
|
|
struct btrfs_path *btrfs_alloc_path(void);
|
|
void btrfs_free_path(struct btrfs_path *p);
|
|
void btrfs_set_path_blocking(struct btrfs_path *p);
|
|
void btrfs_clear_path_blocking(struct btrfs_path *p,
|
|
struct extent_buffer *held);
|
|
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
|
|
|
|
int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct btrfs_path *path, int slot, int nr);
|
|
static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path)
|
|
{
|
|
return btrfs_del_items(trans, root, path, path->slots[0], 1);
|
|
}
|
|
|
|
int setup_items_for_insert(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_path *path,
|
|
struct btrfs_key *cpu_key, u32 *data_size,
|
|
u32 total_data, u32 total_size, int nr);
|
|
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, void *data, u32 data_size);
|
|
int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_key *cpu_key, u32 *data_size, int nr);
|
|
|
|
static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_key *key,
|
|
u32 data_size)
|
|
{
|
|
return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
|
|
}
|
|
|
|
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
|
|
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
|
|
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
|
|
int btrfs_drop_snapshot(struct btrfs_root *root,
|
|
struct btrfs_block_rsv *block_rsv, int update_ref);
|
|
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct extent_buffer *node,
|
|
struct extent_buffer *parent);
|
|
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
|
|
{
|
|
/*
|
|
* Get synced with close_ctree()
|
|
*/
|
|
smp_mb();
|
|
return fs_info->closing;
|
|
}
|
|
|
|
/* root-item.c */
|
|
int btrfs_find_root_ref(struct btrfs_root *tree_root,
|
|
struct btrfs_path *path,
|
|
u64 root_id, u64 ref_id);
|
|
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *tree_root,
|
|
u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
|
|
const char *name, int name_len);
|
|
int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *tree_root,
|
|
u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
|
|
const char *name, int name_len);
|
|
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
|
|
struct btrfs_key *key);
|
|
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_root_item
|
|
*item);
|
|
int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_key *key, struct btrfs_root_item
|
|
*item);
|
|
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
|
|
btrfs_root_item *item, struct btrfs_key *key);
|
|
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
|
|
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
|
|
int btrfs_set_root_node(struct btrfs_root_item *item,
|
|
struct extent_buffer *node);
|
|
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
|
|
|
|
/* dir-item.c */
|
|
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, const char *name,
|
|
int name_len, struct inode *dir,
|
|
struct btrfs_key *location, u8 type, u64 index);
|
|
struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
const char *name, int name_len,
|
|
int mod);
|
|
struct btrfs_dir_item *
|
|
btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
u64 objectid, const char *name, int name_len,
|
|
int mod);
|
|
struct btrfs_dir_item *
|
|
btrfs_search_dir_index_item(struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dirid,
|
|
const char *name, int name_len);
|
|
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
const char *name, int name_len);
|
|
int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
struct btrfs_dir_item *di);
|
|
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid,
|
|
const char *name, u16 name_len,
|
|
const void *data, u16 data_len);
|
|
struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 dir,
|
|
const char *name, u16 name_len,
|
|
int mod);
|
|
int verify_dir_item(struct btrfs_root *root,
|
|
struct extent_buffer *leaf,
|
|
struct btrfs_dir_item *dir_item);
|
|
|
|
/* orphan.c */
|
|
int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 offset);
|
|
int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 offset);
|
|
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
|
|
|
|
/* inode-item.c */
|
|
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const char *name, int name_len,
|
|
u64 inode_objectid, u64 ref_objectid, u64 index);
|
|
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const char *name, int name_len,
|
|
u64 inode_objectid, u64 ref_objectid, u64 *index);
|
|
struct btrfs_inode_ref *
|
|
btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
const char *name, int name_len,
|
|
u64 inode_objectid, u64 ref_objectid, int mod);
|
|
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid);
|
|
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
|
|
*root, struct btrfs_path *path,
|
|
struct btrfs_key *location, int mod);
|
|
|
|
/* file-item.c */
|
|
int btrfs_del_csums(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 bytenr, u64 len);
|
|
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
|
|
struct bio *bio, u32 *dst);
|
|
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
|
|
struct bio *bio, u64 logical_offset, u32 *dst);
|
|
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
u64 objectid, u64 pos,
|
|
u64 disk_offset, u64 disk_num_bytes,
|
|
u64 num_bytes, u64 offset, u64 ram_bytes,
|
|
u8 compression, u8 encryption, u16 other_encoding);
|
|
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path, u64 objectid,
|
|
u64 bytenr, int mod);
|
|
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_ordered_sum *sums);
|
|
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
|
|
struct bio *bio, u64 file_start, int contig);
|
|
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct btrfs_path *path,
|
|
u64 bytenr, int cow);
|
|
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_path *path,
|
|
u64 isize);
|
|
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
|
|
struct list_head *list, int search_commit);
|
|
/* inode.c */
|
|
|
|
/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
|
|
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
|
|
#define ClearPageChecked ClearPageFsMisc
|
|
#define SetPageChecked SetPageFsMisc
|
|
#define PageChecked PageFsMisc
|
|
#endif
|
|
|
|
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
|
|
int btrfs_set_inode_index(struct inode *dir, u64 *index);
|
|
int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *dir, struct inode *inode,
|
|
const char *name, int name_len);
|
|
int btrfs_add_link(struct btrfs_trans_handle *trans,
|
|
struct inode *parent_inode, struct inode *inode,
|
|
const char *name, int name_len, int add_backref, u64 index);
|
|
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *dir, u64 objectid,
|
|
const char *name, int name_len);
|
|
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *inode, u64 new_size,
|
|
u32 min_type);
|
|
|
|
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
|
|
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
|
|
struct extent_state **cached_state);
|
|
int btrfs_writepages(struct address_space *mapping,
|
|
struct writeback_control *wbc);
|
|
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *new_root, u64 new_dirid);
|
|
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
|
|
size_t size, struct bio *bio, unsigned long bio_flags);
|
|
|
|
unsigned long btrfs_force_ra(struct address_space *mapping,
|
|
struct file_ra_state *ra, struct file *file,
|
|
pgoff_t offset, pgoff_t last_index);
|
|
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
|
|
int btrfs_readpage(struct file *file, struct page *page);
|
|
void btrfs_evict_inode(struct inode *inode);
|
|
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
|
|
void btrfs_dirty_inode(struct inode *inode);
|
|
struct inode *btrfs_alloc_inode(struct super_block *sb);
|
|
void btrfs_destroy_inode(struct inode *inode);
|
|
int btrfs_drop_inode(struct inode *inode);
|
|
int btrfs_init_cachep(void);
|
|
void btrfs_destroy_cachep(void);
|
|
long btrfs_ioctl_trans_end(struct file *file);
|
|
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
|
|
struct btrfs_root *root, int *was_new);
|
|
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
|
|
size_t pg_offset, u64 start, u64 end,
|
|
int create);
|
|
int btrfs_update_inode(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
struct inode *inode);
|
|
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
|
|
int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
|
|
int btrfs_orphan_cleanup(struct btrfs_root *root);
|
|
void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
|
|
struct btrfs_pending_snapshot *pending,
|
|
u64 *bytes_to_reserve);
|
|
void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
|
|
struct btrfs_pending_snapshot *pending);
|
|
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
|
|
int btrfs_invalidate_inodes(struct btrfs_root *root);
|
|
void btrfs_add_delayed_iput(struct inode *inode);
|
|
void btrfs_run_delayed_iputs(struct btrfs_root *root);
|
|
int btrfs_prealloc_file_range(struct inode *inode, int mode,
|
|
u64 start, u64 num_bytes, u64 min_size,
|
|
loff_t actual_len, u64 *alloc_hint);
|
|
int btrfs_prealloc_file_range_trans(struct inode *inode,
|
|
struct btrfs_trans_handle *trans, int mode,
|
|
u64 start, u64 num_bytes, u64 min_size,
|
|
loff_t actual_len, u64 *alloc_hint);
|
|
extern const struct dentry_operations btrfs_dentry_operations;
|
|
|
|
/* ioctl.c */
|
|
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
|
|
void btrfs_update_iflags(struct inode *inode);
|
|
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
|
|
int btrfs_defrag_file(struct inode *inode, struct file *file,
|
|
struct btrfs_ioctl_defrag_range_args *range,
|
|
u64 newer_than, unsigned long max_pages);
|
|
/* file.c */
|
|
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
|
|
struct inode *inode);
|
|
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
|
|
int btrfs_sync_file(struct file *file, int datasync);
|
|
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
|
|
int skip_pinned);
|
|
extern const struct file_operations btrfs_file_operations;
|
|
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
|
|
u64 start, u64 end, u64 *hint_byte, int drop_cache);
|
|
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
|
|
struct inode *inode, u64 start, u64 end);
|
|
int btrfs_release_file(struct inode *inode, struct file *file);
|
|
void btrfs_drop_pages(struct page **pages, size_t num_pages);
|
|
int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
|
|
struct page **pages, size_t num_pages,
|
|
loff_t pos, size_t write_bytes,
|
|
struct extent_state **cached);
|
|
|
|
/* tree-defrag.c */
|
|
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, int cache_only);
|
|
|
|
/* sysfs.c */
|
|
int btrfs_init_sysfs(void);
|
|
void btrfs_exit_sysfs(void);
|
|
|
|
/* xattr.c */
|
|
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
|
|
|
|
/* super.c */
|
|
int btrfs_parse_options(struct btrfs_root *root, char *options);
|
|
int btrfs_sync_fs(struct super_block *sb, int wait);
|
|
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
|
|
unsigned int line, int errno);
|
|
|
|
#define btrfs_std_error(fs_info, errno) \
|
|
do { \
|
|
if ((errno)) \
|
|
__btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
|
|
} while (0)
|
|
|
|
/* acl.c */
|
|
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
|
|
int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
|
|
#else
|
|
#define btrfs_check_acl NULL
|
|
#endif
|
|
int btrfs_init_acl(struct btrfs_trans_handle *trans,
|
|
struct inode *inode, struct inode *dir);
|
|
int btrfs_acl_chmod(struct inode *inode);
|
|
|
|
/* relocation.c */
|
|
int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
|
|
int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root);
|
|
int btrfs_recover_relocation(struct btrfs_root *root);
|
|
int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
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void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct extent_buffer *buf,
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struct extent_buffer *cow);
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void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
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struct btrfs_pending_snapshot *pending,
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u64 *bytes_to_reserve);
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void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
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struct btrfs_pending_snapshot *pending);
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/* scrub.c */
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int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
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struct btrfs_scrub_progress *progress, int readonly);
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int btrfs_scrub_pause(struct btrfs_root *root);
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int btrfs_scrub_pause_super(struct btrfs_root *root);
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int btrfs_scrub_continue(struct btrfs_root *root);
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int btrfs_scrub_continue_super(struct btrfs_root *root);
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int btrfs_scrub_cancel(struct btrfs_root *root);
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int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
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int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
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int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
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struct btrfs_scrub_progress *progress);
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#endif
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