2698 lines
82 KiB
C
2698 lines
82 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_H__
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#define __BTRFS_CTREE_H__
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#include <stdbool.h>
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#if BTRFS_FLAT_INCLUDES
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#include "kernel-lib/list.h"
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#include "kernel-lib/rbtree.h"
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#include "kerncompat.h"
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#include "ioctl.h"
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#else
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#include <btrfs/list.h>
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#include <btrfs/rbtree.h>
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#include <btrfs/kerncompat.h>
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#include <btrfs/ioctl.h>
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#endif /* BTRFS_FLAT_INCLUDES */
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struct btrfs_root;
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struct btrfs_trans_handle;
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struct btrfs_free_space_ctl;
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#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
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/*
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* Fake signature for an unfinalized filesystem, which only has barebone tree
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* structures (normally 6 near empty trees, on SINGLE meta/sys temporary chunks)
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*
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* ascii !BHRfS_M, no null
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*/
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#define BTRFS_MAGIC_TEMPORARY 0x4D5F536652484221ULL
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#define BTRFS_MAX_MIRRORS 3
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#define BTRFS_MAX_LEVEL 8
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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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#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
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/* for storing items that use the BTRFS_UUID_KEY* */
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#define BTRFS_UUID_TREE_OBJECTID 9ULL
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/* tracks free space in block groups. */
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#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
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/* hold the block group items. */
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#define BTRFS_BLOCK_GROUP_TREE_OBJECTID 11ULL
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/* device stats in the device tree */
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#define BTRFS_DEV_STATS_OBJECTID 0ULL
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/* for storing balance parameters in the root tree */
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#define BTRFS_BALANCE_OBJECTID -4ULL
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/* orphan 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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/* 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 storing
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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_EMPTY_SUBVOL_DIR_OBJECTID 2ULL
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/*
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* the max metadata block size. This limit is somewhat artificial,
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* but the memmove costs go through the roof for larger blocks.
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*/
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#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
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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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/*
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* Theoretical limit is larger, but we keep this down to a sane
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* value. That should limit greatly the possibility of collisions on
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* inode ref items.
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*/
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#define BTRFS_LINK_MAX 65535U
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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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enum btrfs_csum_type {
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BTRFS_CSUM_TYPE_CRC32 = 0,
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BTRFS_CSUM_TYPE_XXHASH = 1,
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BTRFS_CSUM_TYPE_SHA256 = 2,
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BTRFS_CSUM_TYPE_BLAKE2 = 3,
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};
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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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#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
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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. objectid corresponds to the inode number. The flags
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* tells us things about the object, and is a kind of stream selector.
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* so for a given inode, keys with flags of 1 might refer to the inode
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* data, flags of 2 may point to file data in the btree and flags == 3
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* may point to 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 cache_tree {
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struct rb_root root;
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};
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struct cache_extent {
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struct rb_node rb_node;
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u64 objectid;
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u64 start;
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u64 size;
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};
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struct extent_io_tree {
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struct cache_tree state;
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struct cache_tree cache;
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struct list_head lru;
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u64 cache_size;
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u64 max_cache_size;
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};
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struct extent_state {
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struct cache_extent cache_node;
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u64 start;
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u64 end;
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int refs;
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unsigned long state;
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u64 xprivate;
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};
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struct extent_buffer {
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struct cache_extent cache_node;
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u64 start;
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struct list_head lru;
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struct list_head recow;
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u32 len;
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int refs;
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u32 flags;
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struct btrfs_fs_info *fs_info;
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char data[] __attribute__((aligned(8)));
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};
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struct btrfs_mapping_tree {
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struct cache_tree cache_tree;
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};
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#define BTRFS_UUID_SIZE 16
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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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#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
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#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
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#define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
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#define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
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#define BTRFS_SUPER_FLAG_CHANGING_FSID_V2 (1ULL << 36)
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#define BTRFS_SUPER_FLAG_CHANGING_CSUM (1ULL << 37)
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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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static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 nodesize)
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{
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return nodesize - sizeof(struct btrfs_header);
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}
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#define BTRFS_LEAF_DATA_SIZE(fs_info) (fs_info->leaf_data_size)
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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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* just in case we somehow lose the roots and are not able to mount,
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* we store an array of the roots from previous transactions
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* in the super.
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*/
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#define BTRFS_NUM_BACKUP_ROOTS 4
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struct btrfs_root_backup {
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__le64 tree_root;
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__le64 tree_root_gen;
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__le64 chunk_root;
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__le64 chunk_root_gen;
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__le64 extent_root;
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__le64 extent_root_gen;
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__le64 fs_root;
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__le64 fs_root_gen;
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__le64 dev_root;
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__le64 dev_root_gen;
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__le64 csum_root;
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__le64 csum_root_gen;
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__le64 total_bytes;
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__le64 bytes_used;
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__le64 num_devices;
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/* future */
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__le64 unsed_64[4];
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u8 tree_root_level;
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u8 chunk_root_level;
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u8 extent_root_level;
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u8 fs_root_level;
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u8 dev_root_level;
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u8 csum_root_level;
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/* future and to align */
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u8 unused_8[10];
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} __attribute__ ((__packed__));
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#define BTRFS_SUPER_INFO_OFFSET (65536)
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#define BTRFS_SUPER_INFO_SIZE (4096)
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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 3 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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/* Unused and must be equal to nodesize */
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__le32 __unused_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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__le64 uuid_tree_generation;
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u8 metadata_uuid[BTRFS_FSID_SIZE];
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__le64 nr_global_roots;
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__le64 block_group_root;
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__le64 block_group_root_generation;
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u8 block_group_root_level;
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/* future expansion */
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u8 reserved8[7];
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__le64 reserved[24];
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u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
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/* Padded to 4096 bytes */
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u8 padding[565];
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} __attribute__ ((__packed__));
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BUILD_ASSERT(sizeof(struct btrfs_super_block) == BTRFS_SUPER_INFO_SIZE);
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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_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
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/*
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* Older kernels on big-endian systems produced broken free space tree bitmaps,
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* and btrfs-progs also used to corrupt the free space tree. If this bit is
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* clear, then the free space tree cannot be trusted. btrfs-progs can also
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* intentionally clear this bit to ask the kernel to rebuild the free space
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* tree.
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*/
|
|
#define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
|
|
|
|
#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
|
|
#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
|
|
#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
|
|
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
|
|
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
|
|
|
|
/*
|
|
* older kernels tried to do bigger metadata blocks, but the
|
|
* code was pretty buggy. Lets not let them try anymore.
|
|
*/
|
|
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
|
|
#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
|
|
#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
|
|
#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
|
|
#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
|
|
#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
|
|
#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
|
|
#define BTRFS_FEATURE_INCOMPAT_ZONED (1ULL << 12)
|
|
#define BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2 (1ULL << 13)
|
|
|
|
#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
|
|
|
|
/*
|
|
* The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
|
|
* added here until read-write support for the free space tree is implemented in
|
|
* btrfs-progs.
|
|
*/
|
|
#define BTRFS_FEATURE_COMPAT_RO_SUPP \
|
|
(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \
|
|
BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)
|
|
|
|
#if EXPERIMENTAL
|
|
#define BTRFS_FEATURE_INCOMPAT_SUPP \
|
|
(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
|
|
BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
|
|
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
|
|
BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
|
|
BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
|
|
BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
|
|
BTRFS_FEATURE_INCOMPAT_RAID56 | \
|
|
BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
|
|
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
|
|
BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
|
|
BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
|
|
BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
|
|
BTRFS_FEATURE_INCOMPAT_ZONED | \
|
|
BTRFS_FEATURE_INCOMPAT_EXTENT_TREE_V2)
|
|
#else
|
|
#define BTRFS_FEATURE_INCOMPAT_SUPP \
|
|
(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
|
|
BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
|
|
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
|
|
BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
|
|
BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
|
|
BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
|
|
BTRFS_FEATURE_INCOMPAT_RAID56 | \
|
|
BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
|
|
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
|
|
BTRFS_FEATURE_INCOMPAT_NO_HOLES | \
|
|
BTRFS_FEATURE_INCOMPAT_RAID1C34 | \
|
|
BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \
|
|
BTRFS_FEATURE_INCOMPAT_ZONED)
|
|
#endif
|
|
|
|
/*
|
|
* A leaf is full of items. offset and size tell us where to find
|
|
* the item in the leaf (relative to the start of the data area)
|
|
*/
|
|
struct btrfs_item {
|
|
struct btrfs_disk_key key;
|
|
__le32 offset;
|
|
__le32 size;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* leaves have an item area and a data area:
|
|
* [item0, item1....itemN] [free space] [dataN...data1, data0]
|
|
*
|
|
* The data is separate from the items to get the keys closer together
|
|
* during searches.
|
|
*/
|
|
struct btrfs_leaf {
|
|
struct btrfs_header header;
|
|
struct btrfs_item items[];
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* all non-leaf blocks are nodes, they hold only keys and pointers to
|
|
* other blocks
|
|
*/
|
|
struct btrfs_key_ptr {
|
|
struct btrfs_disk_key key;
|
|
__le64 blockptr;
|
|
__le64 generation;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_node {
|
|
struct btrfs_header header;
|
|
struct btrfs_key_ptr ptrs[];
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* btrfs_paths remember the path taken from the root down to the leaf.
|
|
* level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
|
|
* to any other levels that are present.
|
|
*
|
|
* The slots array records the index of the item or block pointer
|
|
* used while walking the tree.
|
|
*/
|
|
enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
|
|
struct btrfs_path {
|
|
struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
|
|
int slots[BTRFS_MAX_LEVEL];
|
|
#if 0
|
|
/* The kernel locking scheme is not done in userspace. */
|
|
int locks[BTRFS_MAX_LEVEL];
|
|
#endif
|
|
signed char reada;
|
|
/* keep some upper locks as we walk down */
|
|
u8 lowest_level;
|
|
|
|
/*
|
|
* set by btrfs_split_item, tells search_slot to keep all locks
|
|
* and to force calls to keep space in the nodes
|
|
*/
|
|
u8 search_for_split;
|
|
u8 skip_check_block;
|
|
};
|
|
|
|
/*
|
|
* items in the extent btree are used to record the objectid of the
|
|
* owner of the block and the number of references
|
|
*/
|
|
|
|
struct btrfs_extent_item {
|
|
__le64 refs;
|
|
__le64 generation;
|
|
__le64 flags;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_extent_item_v0 {
|
|
__le32 refs;
|
|
} __attribute__ ((__packed__));
|
|
|
|
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
|
|
((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
|
|
sizeof(struct btrfs_item))
|
|
#define BTRFS_MAX_EXTENT_SIZE 128UL * 1024 * 1024
|
|
|
|
#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
|
|
#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
|
|
|
|
/* following flags only apply to tree blocks */
|
|
|
|
/* use full backrefs for extent pointers in the block*/
|
|
#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
|
|
|
|
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__));
|
|
|
|
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_inode_extref {
|
|
__le64 parent_objectid;
|
|
__le64 index;
|
|
__le16 name_len;
|
|
__u8 name[0]; /* name goes here */
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_timespec {
|
|
__le64 sec;
|
|
__le32 nsec;
|
|
} __attribute__ ((__packed__));
|
|
|
|
typedef enum {
|
|
BTRFS_COMPRESS_NONE = 0,
|
|
BTRFS_COMPRESS_ZLIB = 1,
|
|
BTRFS_COMPRESS_LZO = 2,
|
|
BTRFS_COMPRESS_ZSTD = 3,
|
|
BTRFS_COMPRESS_TYPES = 3,
|
|
BTRFS_COMPRESS_LAST = 4,
|
|
} btrfs_compression_type;
|
|
|
|
/* we don't understand any encryption methods right now */
|
|
typedef enum {
|
|
BTRFS_ENCRYPTION_NONE = 0,
|
|
BTRFS_ENCRYPTION_LAST = 1,
|
|
} btrfs_encryption_type;
|
|
|
|
enum btrfs_tree_block_status {
|
|
BTRFS_TREE_BLOCK_CLEAN,
|
|
BTRFS_TREE_BLOCK_INVALID_NRITEMS,
|
|
BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
|
|
BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
|
|
BTRFS_TREE_BLOCK_INVALID_LEVEL,
|
|
BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
|
|
BTRFS_TREE_BLOCK_INVALID_OFFSETS,
|
|
BTRFS_TREE_BLOCK_INVALID_BLOCKPTR,
|
|
};
|
|
|
|
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__));
|
|
|
|
struct btrfs_root_item_v0 {
|
|
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__));
|
|
|
|
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;
|
|
|
|
/*
|
|
* The following fields appear after subvol_uuids+subvol_times
|
|
* were introduced.
|
|
*/
|
|
|
|
/*
|
|
* This generation number is used to test if the new fields are valid
|
|
* and up to date while reading the root item. Every time the root item
|
|
* is written out, the "generation" field is copied into this field. If
|
|
* anyone ever mounted the fs with an older kernel, we will have
|
|
* mismatching generation values here and thus must invalidate the
|
|
* new fields. See btrfs_update_root and btrfs_find_last_root for
|
|
* details.
|
|
* the offset of generation_v2 is also used as the start for the memset
|
|
* when invalidating the fields.
|
|
*/
|
|
__le64 generation_v2;
|
|
u8 uuid[BTRFS_UUID_SIZE];
|
|
u8 parent_uuid[BTRFS_UUID_SIZE];
|
|
u8 received_uuid[BTRFS_UUID_SIZE];
|
|
__le64 ctransid; /* updated when an inode changes */
|
|
__le64 otransid; /* trans when created */
|
|
__le64 stransid; /* trans when sent. non-zero for received subvol */
|
|
__le64 rtransid; /* trans when received. non-zero for received subvol */
|
|
struct btrfs_timespec ctime;
|
|
struct btrfs_timespec otime;
|
|
struct btrfs_timespec stime;
|
|
struct btrfs_timespec rtime;
|
|
|
|
/*
|
|
* If we want to use a specific set of fst/checksum/extent roots for
|
|
* this root.
|
|
*/
|
|
__le64 global_tree_id;
|
|
__le64 reserved[7]; /* for future */
|
|
} __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__));
|
|
|
|
struct btrfs_disk_balance_args {
|
|
/*
|
|
* profiles to operate on, single is denoted by
|
|
* BTRFS_AVAIL_ALLOC_BIT_SINGLE
|
|
*/
|
|
__le64 profiles;
|
|
|
|
/*
|
|
* usage filter
|
|
* BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
|
|
* BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
|
|
*/
|
|
union {
|
|
__le64 usage;
|
|
struct {
|
|
__le32 usage_min;
|
|
__le32 usage_max;
|
|
};
|
|
};
|
|
|
|
/* devid filter */
|
|
__le64 devid;
|
|
|
|
/* devid subset filter [pstart..pend) */
|
|
__le64 pstart;
|
|
__le64 pend;
|
|
|
|
/* btrfs virtual address space subset filter [vstart..vend) */
|
|
__le64 vstart;
|
|
__le64 vend;
|
|
|
|
/*
|
|
* profile to convert to, single is denoted by
|
|
* BTRFS_AVAIL_ALLOC_BIT_SINGLE
|
|
*/
|
|
__le64 target;
|
|
|
|
/* BTRFS_BALANCE_ARGS_* */
|
|
__le64 flags;
|
|
|
|
/*
|
|
* BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
|
|
* BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
|
|
* and maximum
|
|
*/
|
|
union {
|
|
__le64 limit;
|
|
struct {
|
|
__le32 limit_min;
|
|
__le32 limit_max;
|
|
};
|
|
};
|
|
|
|
/*
|
|
* Process chunks that cross stripes_min..stripes_max devices,
|
|
* BTRFS_BALANCE_ARGS_STRIPES_RANGE
|
|
*/
|
|
__le32 stripes_min;
|
|
__le32 stripes_max;
|
|
|
|
__le64 unused[6];
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* store balance parameters to disk so that balance can be properly
|
|
* resumed after crash or unmount
|
|
*/
|
|
struct btrfs_balance_item {
|
|
/* BTRFS_BALANCE_* */
|
|
__le64 flags;
|
|
|
|
struct btrfs_disk_balance_args data;
|
|
struct btrfs_disk_balance_args meta;
|
|
struct btrfs_disk_balance_args sys;
|
|
|
|
__le64 unused[4];
|
|
} __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 data extent
|
|
* Data checksum is stored in csum tree, thus no bytenr/length takes
|
|
* csum into consideration.
|
|
*
|
|
* The inline extent data starts at this offset in the structure.
|
|
*/
|
|
__le64 disk_bytenr;
|
|
__le64 disk_num_bytes;
|
|
/*
|
|
* The logical offset in file blocks.
|
|
* 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. This always reflects the size
|
|
* uncompressed and without encoding.
|
|
*/
|
|
__le64 num_bytes;
|
|
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_dev_stats_item {
|
|
/*
|
|
* grow this item struct at the end for future enhancements and keep
|
|
* the existing values unchanged
|
|
*/
|
|
__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_csum_item {
|
|
u8 csum;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/*
|
|
* We don't want to overwrite 1M at the beginning of device, even though
|
|
* there is our 1st superblock at 64k. Some possible reasons:
|
|
* - the first 64k blank is useful for some boot loader/manager
|
|
* - the first 1M could be scratched by buggy partitioner or somesuch
|
|
*/
|
|
#define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1 * 1024 * 1024)
|
|
|
|
#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
|
|
#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
|
|
#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
|
|
#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
|
|
#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
|
|
#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
|
|
#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
|
|
#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
|
|
#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
|
|
#define BTRFS_BLOCK_GROUP_RAID1C3 (1ULL << 9)
|
|
#define BTRFS_BLOCK_GROUP_RAID1C4 (1ULL << 10)
|
|
#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
|
|
BTRFS_SPACE_INFO_GLOBAL_RSV)
|
|
|
|
enum btrfs_raid_types {
|
|
BTRFS_RAID_RAID10,
|
|
BTRFS_RAID_RAID1,
|
|
BTRFS_RAID_DUP,
|
|
BTRFS_RAID_RAID0,
|
|
BTRFS_RAID_SINGLE,
|
|
BTRFS_RAID_RAID5,
|
|
BTRFS_RAID_RAID6,
|
|
BTRFS_RAID_RAID1C3,
|
|
BTRFS_RAID_RAID1C4,
|
|
BTRFS_NR_RAID_TYPES
|
|
};
|
|
|
|
#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
|
|
BTRFS_BLOCK_GROUP_SYSTEM | \
|
|
BTRFS_BLOCK_GROUP_METADATA)
|
|
|
|
#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
|
|
BTRFS_BLOCK_GROUP_RAID1 | \
|
|
BTRFS_BLOCK_GROUP_RAID5 | \
|
|
BTRFS_BLOCK_GROUP_RAID6 | \
|
|
BTRFS_BLOCK_GROUP_RAID1C3 | \
|
|
BTRFS_BLOCK_GROUP_RAID1C4 | \
|
|
BTRFS_BLOCK_GROUP_DUP | \
|
|
BTRFS_BLOCK_GROUP_RAID10)
|
|
|
|
#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \
|
|
BTRFS_BLOCK_GROUP_RAID6)
|
|
|
|
#define BTRFS_BLOCK_GROUP_RAID1_MASK (BTRFS_BLOCK_GROUP_RAID1 | \
|
|
BTRFS_BLOCK_GROUP_RAID1C3 | \
|
|
BTRFS_BLOCK_GROUP_RAID1C4)
|
|
|
|
/* used in struct btrfs_balance_args fields */
|
|
#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
|
|
|
|
#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
|
|
BTRFS_AVAIL_ALLOC_BIT_SINGLE)
|
|
|
|
/*
|
|
* GLOBAL_RSV does not exist as a on-disk block group type and is used
|
|
* internally for exporting info about global block reserve from space infos
|
|
*/
|
|
#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
|
|
|
|
#define BTRFS_QGROUP_LEVEL_SHIFT 48
|
|
|
|
static inline u64 btrfs_qgroup_level(u64 qgroupid)
|
|
{
|
|
return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
|
|
}
|
|
|
|
static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
|
|
{
|
|
return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
|
|
}
|
|
|
|
#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
|
|
#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
|
|
#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
|
|
|
|
struct btrfs_qgroup_status_item {
|
|
__le64 version;
|
|
__le64 generation;
|
|
__le64 flags;
|
|
__le64 rescan; /* progress during scanning */
|
|
} __attribute__ ((__packed__));
|
|
|
|
#define BTRFS_QGROUP_STATUS_VERSION 1
|
|
struct btrfs_block_group_item {
|
|
__le64 used;
|
|
__le64 chunk_objectid;
|
|
__le64 flags;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_free_space_info {
|
|
__le32 extent_count;
|
|
__le32 flags;
|
|
} __attribute__ ((__packed__));
|
|
|
|
#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
|
|
|
|
struct btrfs_qgroup_info_item {
|
|
__le64 generation;
|
|
__le64 referenced;
|
|
__le64 referenced_compressed;
|
|
__le64 exclusive;
|
|
__le64 exclusive_compressed;
|
|
} __attribute__ ((__packed__));
|
|
|
|
/* flags definition for qgroup limits */
|
|
#define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
|
|
#define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
|
|
#define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
|
|
#define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
|
|
#define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
|
|
#define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
|
|
|
|
struct btrfs_qgroup_limit_item {
|
|
__le64 flags;
|
|
__le64 max_referenced;
|
|
__le64 max_exclusive;
|
|
__le64 rsv_referenced;
|
|
__le64 rsv_exclusive;
|
|
} __attribute__ ((__packed__));
|
|
|
|
struct btrfs_space_info {
|
|
u64 flags;
|
|
u64 total_bytes;
|
|
/*
|
|
* Space already used.
|
|
* Only accounting space in current extent tree, thus delayed ref
|
|
* won't be accounted here.
|
|
*/
|
|
u64 bytes_used;
|
|
|
|
/*
|
|
* Space being pinned down.
|
|
* So extent allocator will not try to allocate space from them.
|
|
*
|
|
* For cases like extents being freed in current transaction, or
|
|
* manually pinned bytes for re-initializing certain trees.
|
|
*/
|
|
u64 bytes_pinned;
|
|
|
|
/*
|
|
* Space being reserved.
|
|
* Space has already being reserved but not yet reach extent tree.
|
|
*
|
|
* New tree blocks allocated in current transaction goes here.
|
|
*/
|
|
u64 bytes_reserved;
|
|
int full;
|
|
struct list_head list;
|
|
};
|
|
|
|
struct btrfs_block_group {
|
|
struct btrfs_space_info *space_info;
|
|
struct btrfs_free_space_ctl *free_space_ctl;
|
|
u64 start;
|
|
u64 length;
|
|
u64 used;
|
|
u64 bytes_super;
|
|
u64 pinned;
|
|
u64 flags;
|
|
int cached;
|
|
int ro;
|
|
/*
|
|
* If the free space extent count exceeds this number, convert the block
|
|
* group to bitmaps.
|
|
*/
|
|
u32 bitmap_high_thresh;
|
|
/*
|
|
* If the free space extent count drops below this number, convert the
|
|
* block group back to extents.
|
|
*/
|
|
u32 bitmap_low_thresh;
|
|
|
|
/* Block group cache stuff */
|
|
struct rb_node cache_node;
|
|
|
|
/* For dirty block groups */
|
|
struct list_head dirty_list;
|
|
|
|
/*
|
|
* Allocation offset for the block group to implement sequential
|
|
* allocation. This is used only with ZONED mode enabled.
|
|
*/
|
|
u64 alloc_offset;
|
|
u64 write_offset;
|
|
|
|
u64 global_root_id;
|
|
};
|
|
|
|
struct btrfs_device;
|
|
struct btrfs_fs_devices;
|
|
struct btrfs_fs_info {
|
|
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
|
|
u8 *new_chunk_tree_uuid;
|
|
struct btrfs_root *fs_root;
|
|
struct btrfs_root *tree_root;
|
|
struct btrfs_root *chunk_root;
|
|
struct btrfs_root *dev_root;
|
|
struct btrfs_root *quota_root;
|
|
struct btrfs_root *uuid_root;
|
|
struct btrfs_root *block_group_root;
|
|
|
|
struct rb_root global_roots_tree;
|
|
struct rb_root fs_root_tree;
|
|
|
|
/* the log root tree is a directory of all the other log roots */
|
|
struct btrfs_root *log_root_tree;
|
|
|
|
struct extent_io_tree extent_cache;
|
|
struct extent_io_tree free_space_cache;
|
|
struct extent_io_tree pinned_extents;
|
|
struct extent_io_tree extent_ins;
|
|
struct extent_io_tree *excluded_extents;
|
|
|
|
struct rb_root block_group_cache_tree;
|
|
/* logical->physical extent mapping */
|
|
struct btrfs_mapping_tree mapping_tree;
|
|
|
|
u64 generation;
|
|
u64 last_trans_committed;
|
|
|
|
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;
|
|
|
|
struct btrfs_trans_handle *running_transaction;
|
|
struct btrfs_super_block *super_copy;
|
|
|
|
u64 super_bytenr;
|
|
u64 total_pinned;
|
|
u64 nr_global_roots;
|
|
|
|
struct list_head dirty_cowonly_roots;
|
|
struct list_head recow_ebs;
|
|
|
|
struct btrfs_fs_devices *fs_devices;
|
|
struct list_head space_info;
|
|
|
|
unsigned int system_allocs:1;
|
|
unsigned int readonly:1;
|
|
unsigned int on_restoring:1;
|
|
unsigned int is_chunk_recover:1;
|
|
unsigned int quota_enabled:1;
|
|
unsigned int suppress_check_block_errors:1;
|
|
unsigned int ignore_fsid_mismatch:1;
|
|
/* Don't verify checksums at all */
|
|
unsigned int skip_csum_check:1;
|
|
unsigned int ignore_chunk_tree_error:1;
|
|
unsigned int avoid_meta_chunk_alloc:1;
|
|
unsigned int avoid_sys_chunk_alloc:1;
|
|
unsigned int finalize_on_close:1;
|
|
unsigned int hide_names:1;
|
|
unsigned int allow_transid_mismatch:1;
|
|
|
|
int transaction_aborted;
|
|
int force_csum_type;
|
|
|
|
int (*free_extent_hook)(u64 bytenr, u64 num_bytes, u64 parent,
|
|
u64 root_objectid, u64 owner, u64 offset,
|
|
int refs_to_drop);
|
|
struct cache_tree *fsck_extent_cache;
|
|
struct cache_tree *corrupt_blocks;
|
|
|
|
/* Cached block sizes */
|
|
u32 nodesize;
|
|
u32 sectorsize;
|
|
u32 stripesize;
|
|
u32 leaf_data_size;
|
|
u16 csum_type;
|
|
u16 csum_size;
|
|
|
|
/*
|
|
* Zone size > 0 when in ZONED mode, otherwise it's used for a check
|
|
* if the mode is enabled
|
|
*/
|
|
union {
|
|
u64 zone_size;
|
|
u64 zoned;
|
|
};
|
|
};
|
|
|
|
static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
|
|
{
|
|
return fs_info->zoned != 0;
|
|
}
|
|
|
|
/*
|
|
* 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_item root_item;
|
|
struct btrfs_key root_key;
|
|
struct btrfs_fs_info *fs_info;
|
|
u64 objectid;
|
|
u64 last_trans;
|
|
|
|
int ref_cows;
|
|
int track_dirty;
|
|
|
|
|
|
u32 type;
|
|
u64 last_inode_alloc;
|
|
|
|
struct list_head unaligned_extent_recs;
|
|
|
|
/* the dirty list is only used by non-reference counted roots */
|
|
struct list_head dirty_list;
|
|
struct rb_node rb_node;
|
|
};
|
|
|
|
static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
|
|
{
|
|
return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
|
|
}
|
|
|
|
static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
|
|
{
|
|
return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
|
|
}
|
|
|
|
static inline u32 BTRFS_NODEPTRS_PER_EXTENT_BUFFER(const struct extent_buffer *eb)
|
|
{
|
|
BUG_ON(!eb->fs_info);
|
|
BUG_ON(eb->fs_info->nodesize != eb->len);
|
|
return BTRFS_LEAF_DATA_SIZE(eb->fs_info) / sizeof(struct btrfs_key_ptr);
|
|
}
|
|
|
|
#define BTRFS_FILE_EXTENT_INLINE_DATA_START \
|
|
(offsetof(struct btrfs_file_extent_item, disk_bytenr))
|
|
static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
|
|
{
|
|
return BTRFS_MAX_ITEM_SIZE(info) -
|
|
BTRFS_FILE_EXTENT_INLINE_DATA_START;
|
|
}
|
|
|
|
static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
|
|
{
|
|
return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
|
|
}
|
|
|
|
/*
|
|
* 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_INODE_EXTREF_KEY 13
|
|
#define BTRFS_XATTR_ITEM_KEY 24
|
|
|
|
#define BTRFS_VERITY_DESC_ITEM_KEY 36
|
|
#define BTRFS_VERITY_MERKLE_ITEM_KEY 37
|
|
|
|
#define BTRFS_ORPHAN_ITEM_KEY 48
|
|
|
|
#define BTRFS_DIR_LOG_ITEM_KEY 60
|
|
#define BTRFS_DIR_LOG_INDEX_KEY 72
|
|
/*
|
|
* dir items are the name -> inode pointers in a directory. There is one
|
|
* for every name in a directory.
|
|
*/
|
|
#define BTRFS_DIR_ITEM_KEY 84
|
|
#define BTRFS_DIR_INDEX_KEY 96
|
|
|
|
/*
|
|
* extent data is for file data
|
|
*/
|
|
#define BTRFS_EXTENT_DATA_KEY 108
|
|
|
|
/*
|
|
* csum items have the checksums for data in the extents
|
|
*/
|
|
#define BTRFS_CSUM_ITEM_KEY 120
|
|
/*
|
|
* 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. There 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
|
|
|
|
/*
|
|
* The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
|
|
* the length, so we save the level in key->offset instead of the length.
|
|
*/
|
|
#define BTRFS_METADATA_ITEM_KEY 169
|
|
|
|
#define BTRFS_TREE_BLOCK_REF_KEY 176
|
|
|
|
#define BTRFS_EXTENT_DATA_REF_KEY 178
|
|
|
|
/* old style extent backrefs */
|
|
#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
|
|
|
|
/*
|
|
* Every block group is represented in the free space tree by a free space info
|
|
* item, which stores some accounting information. It is keyed on
|
|
* (block_group_start, FREE_SPACE_INFO, block_group_length).
|
|
*/
|
|
#define BTRFS_FREE_SPACE_INFO_KEY 198
|
|
|
|
/*
|
|
* A free space extent tracks an extent of space that is free in a block group.
|
|
* It is keyed on (start, FREE_SPACE_EXTENT, length).
|
|
*/
|
|
#define BTRFS_FREE_SPACE_EXTENT_KEY 199
|
|
|
|
/*
|
|
* When a block group becomes very fragmented, we convert it to use bitmaps
|
|
* instead of extents. A free space bitmap is keyed on
|
|
* (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
|
|
* (length / sectorsize) bits.
|
|
*/
|
|
#define BTRFS_FREE_SPACE_BITMAP_KEY 200
|
|
|
|
#define BTRFS_DEV_EXTENT_KEY 204
|
|
#define BTRFS_DEV_ITEM_KEY 216
|
|
#define BTRFS_CHUNK_ITEM_KEY 228
|
|
|
|
#define BTRFS_BALANCE_ITEM_KEY 248
|
|
|
|
/*
|
|
* quota groups
|
|
*/
|
|
#define BTRFS_QGROUP_STATUS_KEY 240
|
|
#define BTRFS_QGROUP_INFO_KEY 242
|
|
#define BTRFS_QGROUP_LIMIT_KEY 244
|
|
#define BTRFS_QGROUP_RELATION_KEY 246
|
|
|
|
/*
|
|
* Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
|
|
*/
|
|
#define BTRFS_BALANCE_ITEM_KEY 248
|
|
|
|
/*
|
|
* The key type for tree items that are stored persistently, but do not need to
|
|
* exist for extended period of time. The items can exist in any tree.
|
|
*
|
|
* [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
|
|
*
|
|
* Existing items:
|
|
*
|
|
* - balance status item
|
|
* (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
|
|
*/
|
|
#define BTRFS_TEMPORARY_ITEM_KEY 248
|
|
|
|
/*
|
|
* Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
|
|
*/
|
|
#define BTRFS_DEV_STATS_KEY 249
|
|
|
|
/*
|
|
* The key type for tree items that are stored persistently and usually exist
|
|
* for a long period, eg. filesystem lifetime. The item kinds can be status
|
|
* information, stats or preference values. The item can exist in any tree.
|
|
*
|
|
* [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
|
|
*
|
|
* Existing items:
|
|
*
|
|
* - device statistics, store IO stats in the device tree, one key for all
|
|
* stats
|
|
* (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
|
|
*/
|
|
#define BTRFS_PERSISTENT_ITEM_KEY 249
|
|
|
|
/*
|
|
* Persistently stores the device replace state in the device tree.
|
|
* The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
|
|
*/
|
|
#define BTRFS_DEV_REPLACE_KEY 250
|
|
|
|
/*
|
|
* Stores items that allow to quickly map UUIDs to something else.
|
|
* These items are part of the filesystem UUID tree.
|
|
* The key is built like this:
|
|
* (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
|
|
*/
|
|
#if BTRFS_UUID_SIZE != 16
|
|
#error "UUID items require BTRFS_UUID_SIZE == 16!"
|
|
#endif
|
|
#define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
|
|
#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
|
|
* received subvols */
|
|
|
|
/*
|
|
* string items are for debugging. They just store a short string of
|
|
* data in the FS
|
|
*/
|
|
#define BTRFS_STRING_ITEM_KEY 253
|
|
/*
|
|
* 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)
|
|
|
|
void read_extent_buffer(const struct extent_buffer *eb, void *dst,
|
|
unsigned long start, unsigned long len);
|
|
void write_extent_buffer(struct extent_buffer *eb, const void *src,
|
|
unsigned long start, unsigned long len);
|
|
|
|
#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)))
|
|
|
|
#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
|
|
static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
|
|
{ \
|
|
const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
|
|
return le##bits##_to_cpu(h->member); \
|
|
} \
|
|
static inline void btrfs_set_##name(struct extent_buffer *eb, \
|
|
u##bits val) \
|
|
{ \
|
|
struct btrfs_header *h = (struct btrfs_header *)eb->data; \
|
|
h->member = cpu_to_le##bits(val); \
|
|
}
|
|
|
|
#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
|
|
static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
|
|
const type *s) \
|
|
{ \
|
|
unsigned long offset = (unsigned long)s; \
|
|
const type *p = (type *) (eb->data + offset); \
|
|
return get_unaligned_le##bits(&p->member); \
|
|
} \
|
|
static inline void btrfs_set_##name(struct extent_buffer *eb, \
|
|
type *s, u##bits val) \
|
|
{ \
|
|
unsigned long offset = (unsigned long)s; \
|
|
type *p = (type *) (eb->data + offset); \
|
|
put_unaligned_le##bits(val, &p->member); \
|
|
}
|
|
|
|
#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
|
|
static inline u##bits btrfs_##name(const 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 void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
|
|
struct btrfs_chunk *c, int nr,
|
|
u64 val)
|
|
{
|
|
btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
|
|
struct btrfs_chunk *c, int nr,
|
|
u64 val)
|
|
{
|
|
btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
|
|
}
|
|
|
|
/* struct btrfs_block_group_item */
|
|
BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item,
|
|
used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
|
|
struct btrfs_block_group_item, chunk_objectid, 64);
|
|
|
|
BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
|
|
struct btrfs_block_group_item, chunk_objectid, 64);
|
|
BTRFS_SETGET_FUNCS(block_group_flags,
|
|
struct btrfs_block_group_item, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
|
|
struct btrfs_block_group_item, flags, 64);
|
|
|
|
/* extent tree v2 uses chunk_objectid for the global tree id. */
|
|
BTRFS_SETGET_STACK_FUNCS(stack_block_group_global_tree_id,
|
|
struct btrfs_block_group_item, chunk_objectid, 64);
|
|
BTRFS_SETGET_FUNCS(block_group_global_tree_id, struct btrfs_block_group_item,
|
|
chunk_objectid, 64);
|
|
|
|
/* struct btrfs_free_space_info */
|
|
BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
|
|
extent_count, 32);
|
|
BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
|
|
|
|
/* struct btrfs_inode_ref */
|
|
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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_extref */
|
|
BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
|
|
parent_objectid, 64);
|
|
BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
|
|
name_len, 16);
|
|
BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, 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);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
|
|
struct btrfs_inode_item, generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
|
|
struct btrfs_inode_item, sequence, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
|
|
struct btrfs_inode_item, transid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
|
|
struct btrfs_inode_item, size, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
|
|
struct btrfs_inode_item, nbytes, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
|
|
struct btrfs_inode_item, block_group, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
|
|
struct btrfs_inode_item, nlink, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
|
|
struct btrfs_inode_item, uid, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
|
|
struct btrfs_inode_item, gid, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
|
|
struct btrfs_inode_item, mode, 32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
|
|
struct btrfs_inode_item, rdev, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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;
|
|
}
|
|
|
|
static inline struct btrfs_timespec *
|
|
btrfs_inode_otime(struct btrfs_inode_item *inode_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)inode_item;
|
|
ptr += offsetof(struct btrfs_inode_item, otime);
|
|
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);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
|
|
sec, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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);
|
|
}
|
|
|
|
|
|
/* struct btrfs_extent_item */
|
|
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
|
|
struct btrfs_extent_inline_ref, type, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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 unsigned long btrfs_node_key_ptr_offset(const struct extent_buffer *eb, int nr)
|
|
{
|
|
return offsetof(struct btrfs_node, ptrs) +
|
|
sizeof(struct btrfs_key_ptr) * nr;
|
|
}
|
|
|
|
static inline struct btrfs_key_ptr *btrfs_node_key_ptr(const struct extent_buffer *eb, int nr)
|
|
{
|
|
return (struct btrfs_key_ptr *)btrfs_node_key_ptr_offset(eb, nr);
|
|
}
|
|
|
|
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_key_blockptr(eb, btrfs_node_key_ptr(eb, nr));
|
|
}
|
|
|
|
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
btrfs_set_key_blockptr(eb, btrfs_node_key_ptr(eb, nr), val);
|
|
}
|
|
|
|
static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_key_generation(eb, btrfs_node_key_ptr(eb, nr));
|
|
}
|
|
|
|
static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
|
|
int nr, u64 val)
|
|
{
|
|
btrfs_set_key_generation(eb, btrfs_node_key_ptr(eb, nr), val);
|
|
}
|
|
|
|
static inline void btrfs_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
read_eb_member(eb, btrfs_node_key_ptr(eb, nr), struct btrfs_key_ptr,
|
|
key, disk_key);
|
|
}
|
|
|
|
static inline void btrfs_set_node_key(struct extent_buffer *eb,
|
|
struct btrfs_disk_key *disk_key, int nr)
|
|
{
|
|
write_eb_member(eb, btrfs_node_key_ptr(eb, nr), struct btrfs_key_ptr,
|
|
key, disk_key);
|
|
}
|
|
|
|
/* struct btrfs_item */
|
|
BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32);
|
|
BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32);
|
|
|
|
static inline unsigned long btrfs_item_nr_offset(const struct extent_buffer *eb, int nr)
|
|
{
|
|
return offsetof(struct btrfs_leaf, items) +
|
|
sizeof(struct btrfs_item) * nr;
|
|
}
|
|
|
|
static inline struct btrfs_item *btrfs_item_nr(const struct extent_buffer *eb, int nr)
|
|
{
|
|
return (struct btrfs_item *)btrfs_item_nr_offset(eb, nr);
|
|
}
|
|
|
|
#define BTRFS_ITEM_SETGET_FUNCS(member) \
|
|
static inline u32 btrfs_item_##member(const struct extent_buffer *eb, int slot) \
|
|
{ \
|
|
return btrfs_raw_item_##member(eb, btrfs_item_nr(eb, slot)); \
|
|
} \
|
|
static inline void btrfs_set_item_##member(struct extent_buffer *eb, \
|
|
int slot, u32 val) \
|
|
{ \
|
|
btrfs_set_raw_item_##member(eb, btrfs_item_nr(eb, slot), val); \
|
|
}
|
|
|
|
BTRFS_ITEM_SETGET_FUNCS(size)
|
|
BTRFS_ITEM_SETGET_FUNCS(offset)
|
|
|
|
static inline u32 btrfs_item_end(struct extent_buffer *eb, int nr)
|
|
{
|
|
return btrfs_item_offset(eb, nr) + btrfs_item_size(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);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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);
|
|
}
|
|
|
|
/* struct btrfs_free_space_header */
|
|
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,
|
|
const 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);
|
|
}
|
|
|
|
/* 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);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
|
|
32);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
|
|
generation, 64);
|
|
|
|
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 unsigned long btrfs_header_fsid(void)
|
|
{
|
|
return offsetof(struct btrfs_header, fsid);
|
|
}
|
|
|
|
static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
|
|
{
|
|
return offsetof(struct btrfs_header, chunk_tree_uuid);
|
|
}
|
|
|
|
static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
|
|
{
|
|
unsigned long ptr = offsetof(struct btrfs_header, csum);
|
|
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);
|
|
BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
|
|
generation_v2, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
|
|
ctransid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
|
|
otransid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
|
|
stransid, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
|
|
rtransid, 64);
|
|
|
|
static inline struct btrfs_timespec* btrfs_root_ctime(
|
|
struct btrfs_root_item *root_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)root_item;
|
|
ptr += offsetof(struct btrfs_root_item, ctime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_timespec* btrfs_root_otime(
|
|
struct btrfs_root_item *root_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)root_item;
|
|
ptr += offsetof(struct btrfs_root_item, otime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_timespec* btrfs_root_stime(
|
|
struct btrfs_root_item *root_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)root_item;
|
|
ptr += offsetof(struct btrfs_root_item, stime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
static inline struct btrfs_timespec* btrfs_root_rtime(
|
|
struct btrfs_root_item *root_item)
|
|
{
|
|
unsigned long ptr = (unsigned long)root_item;
|
|
ptr += offsetof(struct btrfs_root_item, rtime);
|
|
return (struct btrfs_timespec *)ptr;
|
|
}
|
|
|
|
/* struct btrfs_root_backup */
|
|
BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
|
|
tree_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
|
|
tree_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
|
|
tree_root_level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
|
|
chunk_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
|
|
chunk_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
|
|
chunk_root_level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
|
|
extent_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
|
|
extent_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
|
|
extent_root_level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
|
|
fs_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
|
|
fs_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
|
|
fs_root_level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
|
|
dev_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
|
|
dev_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
|
|
dev_root_level, 8);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
|
|
csum_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
|
|
csum_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
|
|
csum_root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
|
|
total_bytes, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
|
|
bytes_used, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
|
|
num_devices, 64);
|
|
|
|
/*
|
|
* Extent tree v2 doesn't have a global csum or extent root, so we use the
|
|
* extent root slot for the block group root.
|
|
*/
|
|
BTRFS_SETGET_STACK_FUNCS(backup_block_group_root, struct btrfs_root_backup,
|
|
extent_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_block_group_root_gen, struct btrfs_root_backup,
|
|
extent_root_gen, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(backup_block_group_root_level, struct btrfs_root_backup,
|
|
extent_root_level, 8);
|
|
|
|
/* 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_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);
|
|
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
|
|
uuid_tree_generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_block_group_root, struct btrfs_super_block,
|
|
block_group_root, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_block_group_root_generation,
|
|
struct btrfs_super_block,
|
|
block_group_root_generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(super_block_group_root_level,
|
|
struct btrfs_super_block, block_group_root_level, 8);
|
|
BTRFS_SETGET_STACK_FUNCS(super_nr_global_roots, struct btrfs_super_block,
|
|
nr_global_roots, 64);
|
|
|
|
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);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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_STACK_FUNCS(stack_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);
|
|
|
|
/* btrfs_qgroup_status_item */
|
|
BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
|
|
version, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
|
|
flags, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
|
|
rescan, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
|
|
struct btrfs_qgroup_status_item, version, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
|
|
struct btrfs_qgroup_status_item, generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
|
|
struct btrfs_qgroup_status_item, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
|
|
struct btrfs_qgroup_status_item, rescan, 64);
|
|
|
|
/* btrfs_qgroup_info_item */
|
|
BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
|
|
generation, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
|
|
referenced, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
|
|
struct btrfs_qgroup_info_item, referenced_compressed, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
|
|
exclusive, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
|
|
struct btrfs_qgroup_info_item, exclusive_compressed, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
|
|
struct btrfs_qgroup_info_item, generation, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
|
|
struct btrfs_qgroup_info_item, referenced, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
|
|
struct btrfs_qgroup_info_item, referenced_compressed, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
|
|
struct btrfs_qgroup_info_item, exclusive, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
|
|
struct btrfs_qgroup_info_item, exclusive_compressed, 64);
|
|
|
|
/* btrfs_qgroup_limit_item */
|
|
BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
|
|
flags, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
|
|
max_referenced, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
|
|
max_exclusive, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
|
|
rsv_referenced, 64);
|
|
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
|
|
rsv_exclusive, 64);
|
|
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
|
|
struct btrfs_qgroup_limit_item, flags, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
|
|
struct btrfs_qgroup_limit_item, max_referenced, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
|
|
struct btrfs_qgroup_limit_item, max_exclusive, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
|
|
struct btrfs_qgroup_limit_item, rsv_referenced, 64);
|
|
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
|
|
struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
|
|
|
|
/* btrfs_balance_item */
|
|
BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
|
|
|
|
static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
|
|
struct extent_buffer *eb, struct btrfs_balance_item *bi)
|
|
{
|
|
unsigned long offset = (unsigned long)bi;
|
|
struct btrfs_balance_item *p;
|
|
p = (struct btrfs_balance_item *)(eb->data + offset);
|
|
return &p->data;
|
|
}
|
|
|
|
static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
|
|
struct extent_buffer *eb, struct btrfs_balance_item *bi)
|
|
{
|
|
unsigned long offset = (unsigned long)bi;
|
|
struct btrfs_balance_item *p;
|
|
p = (struct btrfs_balance_item *)(eb->data + offset);
|
|
return &p->meta;
|
|
}
|
|
|
|
static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
|
|
struct extent_buffer *eb, struct btrfs_balance_item *bi)
|
|
{
|
|
unsigned long offset = (unsigned long)bi;
|
|
struct btrfs_balance_item *p;
|
|
p = (struct btrfs_balance_item *)(eb->data + offset);
|
|
return &p->sys;
|
|
}
|
|
|
|
static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb,
|
|
const struct btrfs_dev_stats_item *ptr,
|
|
int index)
|
|
{
|
|
u64 val;
|
|
|
|
read_extent_buffer(eb, &val,
|
|
offsetof(struct btrfs_dev_stats_item, values) +
|
|
((unsigned long)ptr) + (index * sizeof(u64)),
|
|
sizeof(val));
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
int nr)
|
|
{
|
|
return btrfs_item_size(eb, nr) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
|
|
}
|
|
|
|
/* struct btrfs_ioctl_search_header */
|
|
static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
|
|
{
|
|
return get_unaligned_64(&sh->transid);
|
|
}
|
|
|
|
static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
|
|
{
|
|
return get_unaligned_64(&sh->objectid);
|
|
}
|
|
|
|
static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
|
|
{
|
|
return get_unaligned_64(&sh->offset);
|
|
}
|
|
|
|
static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
|
|
{
|
|
return get_unaligned_32(&sh->type);
|
|
}
|
|
|
|
static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
|
|
{
|
|
return get_unaligned_32(&sh->len);
|
|
}
|
|
|
|
#define btrfs_fs_incompat(fs_info, opt) \
|
|
__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
|
|
|
|
static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
|
|
{
|
|
struct btrfs_super_block *disk_super;
|
|
disk_super = fs_info->super_copy;
|
|
return !!(btrfs_super_incompat_flags(disk_super) & flag);
|
|
}
|
|
|
|
#define btrfs_fs_compat_ro(fs_info, opt) \
|
|
__btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
|
|
|
|
static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
|
|
{
|
|
struct btrfs_super_block *disk_super;
|
|
disk_super = fs_info->super_copy;
|
|
return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
|
|
}
|
|
|
|
/* 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(leaf, slot)))
|
|
|
|
#define btrfs_item_ptr_offset(leaf, slot) \
|
|
((unsigned long)(btrfs_leaf_data(leaf) + \
|
|
btrfs_item_offset(leaf, slot)))
|
|
|
|
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 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_sibling_tree_block(struct btrfs_fs_info *fs_info,
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struct btrfs_path *path);
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/*
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* Walk up the tree as far as necessary to find the next leaf.
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*
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* returns 0 if it found something or 1 if there are no greater leaves.
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* returns < 0 on io errors.
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*/
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static inline int btrfs_next_leaf(struct btrfs_root *root,
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struct btrfs_path *path)
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{
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path->lowest_level = 0;
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return btrfs_next_sibling_tree_block(root->fs_info, path);
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}
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#endif
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