Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 3101 deletions

diff --git a/ANDROID_3.4.5/fs/btrfs/ctree.h b/ANDROID_3.4.5/fs/btrfs/ctree.h
deleted file mode 100644
index 8fd72331..00000000
--- a/ANDROID_3.4.5/fs/btrfs/ctree.h
+++ /dev/null
@@ -1,3101 +0,0 @@
-/*
- * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-#ifndef __BTRFS_CTREE__
-#define __BTRFS_CTREE__
-
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/fs.h>
-#include <linux/rwsem.h>
-#include <linux/completion.h>
-#include <linux/backing-dev.h>
-#include <linux/wait.h>
-#include <linux/slab.h>
-#include <linux/kobject.h>
-#include <trace/events/btrfs.h>
-#include <asm/kmap_types.h>
-#include <linux/pagemap.h>
-#include "extent_io.h"
-#include "extent_map.h"
-#include "async-thread.h"
-#include "ioctl.h"
-
-struct btrfs_trans_handle;
-struct btrfs_transaction;
-struct btrfs_pending_snapshot;
-extern struct kmem_cache *btrfs_trans_handle_cachep;
-extern struct kmem_cache *btrfs_transaction_cachep;
-extern struct kmem_cache *btrfs_bit_radix_cachep;
-extern struct kmem_cache *btrfs_path_cachep;
-extern struct kmem_cache *btrfs_free_space_cachep;
-struct btrfs_ordered_sum;
-
-#define BTRFS_MAGIC "_BHRfS_M"
-
-#define BTRFS_MAX_MIRRORS 2
-
-#define BTRFS_MAX_LEVEL 8
-
-#define BTRFS_COMPAT_EXTENT_TREE_V0
-
-/*
- * files bigger than this get some pre-flushing when they are added
- * to the ordered operations list.  That way we limit the total
- * work done by the commit
- */
-#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
-
-/* holds pointers to all of the tree roots */
-#define BTRFS_ROOT_TREE_OBJECTID 1ULL
-
-/* stores information about which extents are in use, and reference counts */
-#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
-
-/*
- * chunk tree stores translations from logical -> physical block numbering
- * the super block points to the chunk tree
- */
-#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
-
-/*
- * stores information about which areas of a given device are in use.
- * one per device.  The tree of tree roots points to the device tree
- */
-#define BTRFS_DEV_TREE_OBJECTID 4ULL
-
-/* one per subvolume, storing files and directories */
-#define BTRFS_FS_TREE_OBJECTID 5ULL
-
-/* directory objectid inside the root tree */
-#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
-
-/* holds checksums of all the data extents */
-#define BTRFS_CSUM_TREE_OBJECTID 7ULL
-
-/* for storing balance parameters in the root tree */
-#define BTRFS_BALANCE_OBJECTID -4ULL
-
-/* orhpan objectid for tracking unlinked/truncated files */
-#define BTRFS_ORPHAN_OBJECTID -5ULL
-
-/* does write ahead logging to speed up fsyncs */
-#define BTRFS_TREE_LOG_OBJECTID -6ULL
-#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
-
-/* for space balancing */
-#define BTRFS_TREE_RELOC_OBJECTID -8ULL
-#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
-
-/*
- * extent checksums all have this objectid
- * this allows them to share the logging tree
- * for fsyncs
- */
-#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
-
-/* For storing free space cache */
-#define BTRFS_FREE_SPACE_OBJECTID -11ULL
-
-/*
- * The inode number assigned to the special inode for sotring
- * free ino cache
- */
-#define BTRFS_FREE_INO_OBJECTID -12ULL
-
-/* dummy objectid represents multiple objectids */
-#define BTRFS_MULTIPLE_OBJECTIDS -255ULL
-
-/*
- * All files have objectids in this range.
- */
-#define BTRFS_FIRST_FREE_OBJECTID 256ULL
-#define BTRFS_LAST_FREE_OBJECTID -256ULL
-#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
-
-
-/*
- * the device items go into the chunk tree.  The key is in the form
- * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
- */
-#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
-
-#define BTRFS_BTREE_INODE_OBJECTID 1
-
-#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
-
-/*
- * the max metadata block size.  This limit is somewhat artificial,
- * but the memmove costs go through the roof for larger blocks.
- */
-#define BTRFS_MAX_METADATA_BLOCKSIZE 65536
-
-/*
- * we can actually store much bigger names, but lets not confuse the rest
- * of linux
- */
-#define BTRFS_NAME_LEN 255
-
-/* 32 bytes in various csum fields */
-#define BTRFS_CSUM_SIZE 32
-
-/* csum types */
-#define BTRFS_CSUM_TYPE_CRC32	0
-
-static int btrfs_csum_sizes[] = { 4, 0 };
-
-/* four bytes for CRC32 */
-#define BTRFS_EMPTY_DIR_SIZE 0
-
-#define BTRFS_FT_UNKNOWN	0
-#define BTRFS_FT_REG_FILE	1
-#define BTRFS_FT_DIR		2
-#define BTRFS_FT_CHRDEV		3
-#define BTRFS_FT_BLKDEV		4
-#define BTRFS_FT_FIFO		5
-#define BTRFS_FT_SOCK		6
-#define BTRFS_FT_SYMLINK	7
-#define BTRFS_FT_XATTR		8
-#define BTRFS_FT_MAX		9
-
-/*
- * The key defines the order in the tree, and so it also defines (optimal)
- * block layout.
- *
- * objectid corresponds to the inode number.
- *
- * type tells us things about the object, and is a kind of stream selector.
- * so for a given inode, keys with type of 1 might refer to the inode data,
- * type of 2 may point to file data in the btree and type == 3 may point to
- * extents.
- *
- * offset is the starting byte offset for this key in the stream.
- *
- * btrfs_disk_key is in disk byte order.  struct btrfs_key is always
- * in cpu native order.  Otherwise they are identical and their sizes
- * should be the same (ie both packed)
- */
-struct btrfs_disk_key {
-	__le64 objectid;
-	u8 type;
-	__le64 offset;
-} __attribute__ ((__packed__));
-
-struct btrfs_key {
-	u64 objectid;
-	u8 type;
-	u64 offset;
-} __attribute__ ((__packed__));
-
-struct btrfs_mapping_tree {
-	struct extent_map_tree map_tree;
-};
-
-struct btrfs_dev_item {
-	/* the internal btrfs device id */
-	__le64 devid;
-
-	/* size of the device */
-	__le64 total_bytes;
-
-	/* bytes used */
-	__le64 bytes_used;
-
-	/* optimal io alignment for this device */
-	__le32 io_align;
-
-	/* optimal io width for this device */
-	__le32 io_width;
-
-	/* minimal io size for this device */
-	__le32 sector_size;
-
-	/* type and info about this device */
-	__le64 type;
-
-	/* expected generation for this device */
-	__le64 generation;
-
-	/*
-	 * starting byte of this partition on the device,
-	 * to allow for stripe alignment in the future
-	 */
-	__le64 start_offset;
-
-	/* grouping information for allocation decisions */
-	__le32 dev_group;
-
-	/* seek speed 0-100 where 100 is fastest */
-	u8 seek_speed;
-
-	/* bandwidth 0-100 where 100 is fastest */
-	u8 bandwidth;
-
-	/* btrfs generated uuid for this device */
-	u8 uuid[BTRFS_UUID_SIZE];
-
-	/* uuid of FS who owns this device */
-	u8 fsid[BTRFS_UUID_SIZE];
-} __attribute__ ((__packed__));
-
-struct btrfs_stripe {
-	__le64 devid;
-	__le64 offset;
-	u8 dev_uuid[BTRFS_UUID_SIZE];
-} __attribute__ ((__packed__));
-
-struct btrfs_chunk {
-	/* size of this chunk in bytes */
-	__le64 length;
-
-	/* objectid of the root referencing this chunk */
-	__le64 owner;
-
-	__le64 stripe_len;
-	__le64 type;
-
-	/* optimal io alignment for this chunk */
-	__le32 io_align;
-
-	/* optimal io width for this chunk */
-	__le32 io_width;
-
-	/* minimal io size for this chunk */
-	__le32 sector_size;
-
-	/* 2^16 stripes is quite a lot, a second limit is the size of a single
-	 * item in the btree
-	 */
-	__le16 num_stripes;
-
-	/* sub stripes only matter for raid10 */
-	__le16 sub_stripes;
-	struct btrfs_stripe stripe;
-	/* additional stripes go here */
-} __attribute__ ((__packed__));
-
-#define BTRFS_FREE_SPACE_EXTENT	1
-#define BTRFS_FREE_SPACE_BITMAP	2
-
-struct btrfs_free_space_entry {
-	__le64 offset;
-	__le64 bytes;
-	u8 type;
-} __attribute__ ((__packed__));
-
-struct btrfs_free_space_header {
-	struct btrfs_disk_key location;
-	__le64 generation;
-	__le64 num_entries;
-	__le64 num_bitmaps;
-} __attribute__ ((__packed__));
-
-static inline unsigned long btrfs_chunk_item_size(int num_stripes)
-{
-	BUG_ON(num_stripes == 0);
-	return sizeof(struct btrfs_chunk) +
-		sizeof(struct btrfs_stripe) * (num_stripes - 1);
-}
-
-#define BTRFS_HEADER_FLAG_WRITTEN	(1ULL << 0)
-#define BTRFS_HEADER_FLAG_RELOC		(1ULL << 1)
-
-/*
- * File system states
- */
-
-/* Errors detected */
-#define BTRFS_SUPER_FLAG_ERROR		(1ULL << 2)
-
-#define BTRFS_SUPER_FLAG_SEEDING	(1ULL << 32)
-#define BTRFS_SUPER_FLAG_METADUMP	(1ULL << 33)
-
-#define BTRFS_BACKREF_REV_MAX		256
-#define BTRFS_BACKREF_REV_SHIFT		56
-#define BTRFS_BACKREF_REV_MASK		(((u64)BTRFS_BACKREF_REV_MAX - 1) << \
-					 BTRFS_BACKREF_REV_SHIFT)
-
-#define BTRFS_OLD_BACKREF_REV		0
-#define BTRFS_MIXED_BACKREF_REV		1
-
-/*
- * every tree block (leaf or node) starts with this header.
- */
-struct btrfs_header {
-	/* these first four must match the super block */
-	u8 csum[BTRFS_CSUM_SIZE];
-	u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
-	__le64 bytenr; /* which block this node is supposed to live in */
-	__le64 flags;
-
-	/* allowed to be different from the super from here on down */
-	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
-	__le64 generation;
-	__le64 owner;
-	__le32 nritems;
-	u8 level;
-} __attribute__ ((__packed__));
-
-#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
-				      sizeof(struct btrfs_header)) / \
-				     sizeof(struct btrfs_key_ptr))
-#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
-#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
-#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
-					sizeof(struct btrfs_item) - \
-					sizeof(struct btrfs_file_extent_item))
-#define BTRFS_MAX_XATTR_SIZE(r)	(BTRFS_LEAF_DATA_SIZE(r) - \
-				 sizeof(struct btrfs_item) -\
-				 sizeof(struct btrfs_dir_item))
-
-
-/*
- * this is a very generous portion of the super block, giving us
- * room to translate 14 chunks with 3 stripes each.
- */
-#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
-#define BTRFS_LABEL_SIZE 256
-
-/*
- * just in case we somehow lose the roots and are not able to mount,
- * we store an array of the roots from previous transactions
- * in the super.
- */
-#define BTRFS_NUM_BACKUP_ROOTS 4
-struct btrfs_root_backup {
-	__le64 tree_root;
-	__le64 tree_root_gen;
-
-	__le64 chunk_root;
-	__le64 chunk_root_gen;
-
-	__le64 extent_root;
-	__le64 extent_root_gen;
-
-	__le64 fs_root;
-	__le64 fs_root_gen;
-
-	__le64 dev_root;
-	__le64 dev_root_gen;
-
-	__le64 csum_root;
-	__le64 csum_root_gen;
-
-	__le64 total_bytes;
-	__le64 bytes_used;
-	__le64 num_devices;
-	/* future */
-	__le64 unsed_64[4];
-
-	u8 tree_root_level;
-	u8 chunk_root_level;
-	u8 extent_root_level;
-	u8 fs_root_level;
-	u8 dev_root_level;
-	u8 csum_root_level;
-	/* future and to align */
-	u8 unused_8[10];
-} __attribute__ ((__packed__));
-
-/*
- * the super block basically lists the main trees of the FS
- * it currently lacks any block count etc etc
- */
-struct btrfs_super_block {
-	u8 csum[BTRFS_CSUM_SIZE];
-	/* the first 4 fields must match struct btrfs_header */
-	u8 fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
-	__le64 bytenr; /* this block number */
-	__le64 flags;
-
-	/* allowed to be different from the btrfs_header from here own down */
-	__le64 magic;
-	__le64 generation;
-	__le64 root;
-	__le64 chunk_root;
-	__le64 log_root;
-
-	/* this will help find the new super based on the log root */
-	__le64 log_root_transid;
-	__le64 total_bytes;
-	__le64 bytes_used;
-	__le64 root_dir_objectid;
-	__le64 num_devices;
-	__le32 sectorsize;
-	__le32 nodesize;
-	__le32 leafsize;
-	__le32 stripesize;
-	__le32 sys_chunk_array_size;
-	__le64 chunk_root_generation;
-	__le64 compat_flags;
-	__le64 compat_ro_flags;
-	__le64 incompat_flags;
-	__le16 csum_type;
-	u8 root_level;
-	u8 chunk_root_level;
-	u8 log_root_level;
-	struct btrfs_dev_item dev_item;
-
-	char label[BTRFS_LABEL_SIZE];
-
-	__le64 cache_generation;
-
-	/* future expansion */
-	__le64 reserved[31];
-	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
-	struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
-} __attribute__ ((__packed__));
-
-/*
- * Compat flags that we support.  If any incompat flags are set other than the
- * ones specified below then we will fail to mount
- */
-#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)
-/*
- * some patches floated around with a second compression method
- * lets save that incompat here for when they do get in
- * Note we don't actually support it, we're just reserving the
- * number
- */
-#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2	(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_COMPAT_SUPP		0ULL
-#define BTRFS_FEATURE_COMPAT_RO_SUPP		0ULL
-#define BTRFS_FEATURE_INCOMPAT_SUPP			\
-	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
-	 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |	\
-	 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS |		\
-	 BTRFS_FEATURE_INCOMPAT_BIG_METADATA |		\
-	 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
-
-/*
- * 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.
- */
-struct btrfs_path {
-	struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
-	int slots[BTRFS_MAX_LEVEL];
-	/* if there is real range locking, this locks field will change */
-	int locks[BTRFS_MAX_LEVEL];
-	int reada;
-	/* keep some upper locks as we walk down */
-	int lowest_level;
-
-	/*
-	 * set by btrfs_split_item, tells search_slot to keep all locks
-	 * and to force calls to keep space in the nodes
-	 */
-	unsigned int search_for_split:1;
-	unsigned int keep_locks:1;
-	unsigned int skip_locking:1;
-	unsigned int leave_spinning:1;
-	unsigned int search_commit_root:1;
-};
-
-/*
- * 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) >> 4) - \
-					sizeof(struct btrfs_item))
-
-#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)
-
-/*
- * this flag is only used internally by scrub and may be changed at any time
- * it is only declared here to avoid collisions
- */
-#define BTRFS_EXTENT_FLAG_SUPER		(1ULL << 48)
-
-struct btrfs_tree_block_info {
-	struct btrfs_disk_key key;
-	u8 level;
-} __attribute__ ((__packed__));
-
-struct btrfs_extent_data_ref {
-	__le64 root;
-	__le64 objectid;
-	__le64 offset;
-	__le32 count;
-} __attribute__ ((__packed__));
-
-struct btrfs_shared_data_ref {
-	__le32 count;
-} __attribute__ ((__packed__));
-
-struct btrfs_extent_inline_ref {
-	u8 type;
-	__le64 offset;
-} __attribute__ ((__packed__));
-
-/* old style backrefs item */
-struct btrfs_extent_ref_v0 {
-	__le64 root;
-	__le64 generation;
-	__le64 objectid;
-	__le32 count;
-} __attribute__ ((__packed__));
-
-
-/* dev extents record free space on individual devices.  The owner
- * field points back to the chunk allocation mapping tree that allocated
- * the extent.  The chunk tree uuid field is a way to double check the owner
- */
-struct btrfs_dev_extent {
-	__le64 chunk_tree;
-	__le64 chunk_objectid;
-	__le64 chunk_offset;
-	__le64 length;
-	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
-} __attribute__ ((__packed__));
-
-struct btrfs_inode_ref {
-	__le64 index;
-	__le16 name_len;
-	/* name goes here */
-} __attribute__ ((__packed__));
-
-struct btrfs_timespec {
-	__le64 sec;
-	__le32 nsec;
-} __attribute__ ((__packed__));
-
-enum btrfs_compression_type {
-	BTRFS_COMPRESS_NONE  = 0,
-	BTRFS_COMPRESS_ZLIB  = 1,
-	BTRFS_COMPRESS_LZO   = 2,
-	BTRFS_COMPRESS_TYPES = 2,
-	BTRFS_COMPRESS_LAST  = 3,
-};
-
-struct btrfs_inode_item {
-	/* nfs style generation number */
-	__le64 generation;
-	/* transid that last touched this inode */
-	__le64 transid;
-	__le64 size;
-	__le64 nbytes;
-	__le64 block_group;
-	__le32 nlink;
-	__le32 uid;
-	__le32 gid;
-	__le32 mode;
-	__le64 rdev;
-	__le64 flags;
-
-	/* modification sequence number for NFS */
-	__le64 sequence;
-
-	/*
-	 * a little future expansion, for more than this we can
-	 * just grow the inode item and version it
-	 */
-	__le64 reserved[4];
-	struct btrfs_timespec atime;
-	struct btrfs_timespec ctime;
-	struct btrfs_timespec mtime;
-	struct btrfs_timespec otime;
-} __attribute__ ((__packed__));
-
-struct btrfs_dir_log_item {
-	__le64 end;
-} __attribute__ ((__packed__));
-
-struct btrfs_dir_item {
-	struct btrfs_disk_key location;
-	__le64 transid;
-	__le16 data_len;
-	__le16 name_len;
-	u8 type;
-} __attribute__ ((__packed__));
-
-#define BTRFS_ROOT_SUBVOL_RDONLY	(1ULL << 0)
-
-struct btrfs_root_item {
-	struct btrfs_inode_item inode;
-	__le64 generation;
-	__le64 root_dirid;
-	__le64 bytenr;
-	__le64 byte_limit;
-	__le64 bytes_used;
-	__le64 last_snapshot;
-	__le64 flags;
-	__le32 refs;
-	struct btrfs_disk_key drop_progress;
-	u8 drop_level;
-	u8 level;
-} __attribute__ ((__packed__));
-
-/*
- * this is used for both forward and backward root refs
- */
-struct btrfs_root_ref {
-	__le64 dirid;
-	__le64 sequence;
-	__le16 name_len;
-} __attribute__ ((__packed__));
-
-struct btrfs_disk_balance_args {
-	/*
-	 * profiles to operate on, single is denoted by
-	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
-	 */
-	__le64 profiles;
-
-	/* usage filter */
-	__le64 usage;
-
-	/* 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;
-
-	__le64 unused[8];
-} __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 extent, checksum blocks are included
-	 * in these numbers
-	 */
-	__le64 disk_bytenr;
-	__le64 disk_num_bytes;
-	/*
-	 * the logical offset in file blocks (no csums)
-	 * this extent record is for.  This allows a file extent to point
-	 * into the middle of an existing extent on disk, sharing it
-	 * between two snapshots (useful if some bytes in the middle of the
-	 * extent have changed
-	 */
-	__le64 offset;
-	/*
-	 * the logical number of file blocks (no csums included).  This
-	 * always reflects the size uncompressed and without encoding.
-	 */
-	__le64 num_bytes;
-
-} __attribute__ ((__packed__));
-
-struct btrfs_csum_item {
-	u8 csum;
-} __attribute__ ((__packed__));
-
-/* different types of block groups (and chunks) */
-#define BTRFS_BLOCK_GROUP_DATA		(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_RESERVED	BTRFS_AVAIL_ALLOC_BIT_SINGLE
-#define BTRFS_NR_RAID_TYPES		5
-
-#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_DUP |     \
-					 BTRFS_BLOCK_GROUP_RAID10)
-/*
- * We need a bit for restriper to be able to tell when chunks of type
- * SINGLE are available.  This "extended" profile format is used in
- * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
- * (on-disk).  The corresponding on-disk bit in chunk.type is reserved
- * to avoid remappings between two formats in future.
- */
-#define BTRFS_AVAIL_ALLOC_BIT_SINGLE	(1ULL << 48)
-
-#define BTRFS_EXTENDED_PROFILE_MASK	(BTRFS_BLOCK_GROUP_PROFILE_MASK | \
-					 BTRFS_AVAIL_ALLOC_BIT_SINGLE)
-
-static inline u64 chunk_to_extended(u64 flags)
-{
-	if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
-		flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
-
-	return flags;
-}
-static inline u64 extended_to_chunk(u64 flags)
-{
-	return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
-}
-
-struct btrfs_block_group_item {
-	__le64 used;
-	__le64 chunk_objectid;
-	__le64 flags;
-} __attribute__ ((__packed__));
-
-struct btrfs_space_info {
-	u64 flags;
-
-	u64 total_bytes;	/* total bytes in the space,
-				   this doesn't take mirrors into account */
-	u64 bytes_used;		/* total bytes used,
-				   this doesn't take mirrors into account */
-	u64 bytes_pinned;	/* total bytes pinned, will be freed when the
-				   transaction finishes */
-	u64 bytes_reserved;	/* total bytes the allocator has reserved for
-				   current allocations */
-	u64 bytes_readonly;	/* total bytes that are read only */
-
-	u64 bytes_may_use;	/* number of bytes that may be used for
-				   delalloc/allocations */
-	u64 disk_used;		/* total bytes used on disk */
-	u64 disk_total;		/* total bytes on disk, takes mirrors into
-				   account */
-
-	/*
-	 * we bump reservation progress every time we decrement
-	 * bytes_reserved.  This way people waiting for reservations
-	 * know something good has happened and they can check
-	 * for progress.  The number here isn't to be trusted, it
-	 * just shows reclaim activity
-	 */
-	unsigned long reservation_progress;
-
-	unsigned int full:1;	/* indicates that we cannot allocate any more
-				   chunks for this space */
-	unsigned int chunk_alloc:1;	/* set if we are allocating a chunk */
-
-	unsigned int flush:1;		/* set if we are trying to make space */
-
-	unsigned int force_alloc;	/* set if we need to force a chunk
-					   alloc for this space */
-
-	struct list_head list;
-
-	/* for block groups in our same type */
-	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
-	spinlock_t lock;
-	struct rw_semaphore groups_sem;
-	wait_queue_head_t wait;
-};
-
-struct btrfs_block_rsv {
-	u64 size;
-	u64 reserved;
-	struct btrfs_space_info *space_info;
-	spinlock_t lock;
-	unsigned int full;
-};
-
-/*
- * free clusters are used to claim free space in relatively large chunks,
- * allowing us to do less seeky writes.  They are used for all metadata
- * allocations and data allocations in ssd mode.
- */
-struct btrfs_free_cluster {
-	spinlock_t lock;
-	spinlock_t refill_lock;
-	struct rb_root root;
-
-	/* largest extent in this cluster */
-	u64 max_size;
-
-	/* first extent starting offset */
-	u64 window_start;
-
-	struct btrfs_block_group_cache *block_group;
-	/*
-	 * when a cluster is allocated from a block group, we put the
-	 * cluster onto a list in the block group so that it can
-	 * be freed before the block group is freed.
-	 */
-	struct list_head block_group_list;
-};
-
-enum btrfs_caching_type {
-	BTRFS_CACHE_NO		= 0,
-	BTRFS_CACHE_STARTED	= 1,
-	BTRFS_CACHE_FAST	= 2,
-	BTRFS_CACHE_FINISHED	= 3,
-};
-
-enum btrfs_disk_cache_state {
-	BTRFS_DC_WRITTEN	= 0,
-	BTRFS_DC_ERROR		= 1,
-	BTRFS_DC_CLEAR		= 2,
-	BTRFS_DC_SETUP		= 3,
-	BTRFS_DC_NEED_WRITE	= 4,
-};
-
-struct btrfs_caching_control {
-	struct list_head list;
-	struct mutex mutex;
-	wait_queue_head_t wait;
-	struct btrfs_work work;
-	struct btrfs_block_group_cache *block_group;
-	u64 progress;
-	atomic_t count;
-};
-
-struct btrfs_block_group_cache {
-	struct btrfs_key key;
-	struct btrfs_block_group_item item;
-	struct btrfs_fs_info *fs_info;
-	struct inode *inode;
-	spinlock_t lock;
-	u64 pinned;
-	u64 reserved;
-	u64 bytes_super;
-	u64 flags;
-	u64 sectorsize;
-	u64 cache_generation;
-	unsigned int ro:1;
-	unsigned int dirty:1;
-	unsigned int iref:1;
-
-	int disk_cache_state;
-
-	/* cache tracking stuff */
-	int cached;
-	struct btrfs_caching_control *caching_ctl;
-	u64 last_byte_to_unpin;
-
-	struct btrfs_space_info *space_info;
-
-	/* free space cache stuff */
-	struct btrfs_free_space_ctl *free_space_ctl;
-
-	/* block group cache stuff */
-	struct rb_node cache_node;
-
-	/* for block groups in the same raid type */
-	struct list_head list;
-
-	/* usage count */
-	atomic_t count;
-
-	/* List of struct btrfs_free_clusters for this block group.
-	 * Today it will only have one thing on it, but that may change
-	 */
-	struct list_head cluster_list;
-};
-
-struct reloc_control;
-struct btrfs_device;
-struct btrfs_fs_devices;
-struct btrfs_balance_control;
-struct btrfs_delayed_root;
-struct btrfs_fs_info {
-	u8 fsid[BTRFS_FSID_SIZE];
-	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
-	struct btrfs_root *extent_root;
-	struct btrfs_root *tree_root;
-	struct btrfs_root *chunk_root;
-	struct btrfs_root *dev_root;
-	struct btrfs_root *fs_root;
-	struct btrfs_root *csum_root;
-
-	/* the log root tree is a directory of all the other log roots */
-	struct btrfs_root *log_root_tree;
-
-	spinlock_t fs_roots_radix_lock;
-	struct radix_tree_root fs_roots_radix;
-
-	/* block group cache stuff */
-	spinlock_t block_group_cache_lock;
-	struct rb_root block_group_cache_tree;
-
-	/* keep track of unallocated space */
-	spinlock_t free_chunk_lock;
-	u64 free_chunk_space;
-
-	struct extent_io_tree freed_extents[2];
-	struct extent_io_tree *pinned_extents;
-
-	/* logical->physical extent mapping */
-	struct btrfs_mapping_tree mapping_tree;
-
-	/*
-	 * block reservation for extent, checksum, root tree and
-	 * delayed dir index item
-	 */
-	struct btrfs_block_rsv global_block_rsv;
-	/* block reservation for delay allocation */
-	struct btrfs_block_rsv delalloc_block_rsv;
-	/* block reservation for metadata operations */
-	struct btrfs_block_rsv trans_block_rsv;
-	/* block reservation for chunk tree */
-	struct btrfs_block_rsv chunk_block_rsv;
-	/* block reservation for delayed operations */
-	struct btrfs_block_rsv delayed_block_rsv;
-
-	struct btrfs_block_rsv empty_block_rsv;
-
-	u64 generation;
-	u64 last_trans_committed;
-
-	/*
-	 * this is updated to the current trans every time a full commit
-	 * is required instead of the faster short fsync log commits
-	 */
-	u64 last_trans_log_full_commit;
-	unsigned long mount_opt;
-	unsigned long compress_type:4;
-	u64 max_inline;
-	u64 alloc_start;
-	struct btrfs_transaction *running_transaction;
-	wait_queue_head_t transaction_throttle;
-	wait_queue_head_t transaction_wait;
-	wait_queue_head_t transaction_blocked_wait;
-	wait_queue_head_t async_submit_wait;
-
-	struct btrfs_super_block *super_copy;
-	struct btrfs_super_block *super_for_commit;
-	struct block_device *__bdev;
-	struct super_block *sb;
-	struct inode *btree_inode;
-	struct backing_dev_info bdi;
-	struct mutex tree_log_mutex;
-	struct mutex transaction_kthread_mutex;
-	struct mutex cleaner_mutex;
-	struct mutex chunk_mutex;
-	struct mutex volume_mutex;
-	/*
-	 * this protects the ordered operations list only while we are
-	 * processing all of the entries on it.  This way we make
-	 * sure the commit code doesn't find the list temporarily empty
-	 * because another function happens to be doing non-waiting preflush
-	 * before jumping into the main commit.
-	 */
-	struct mutex ordered_operations_mutex;
-	struct rw_semaphore extent_commit_sem;
-
-	struct rw_semaphore cleanup_work_sem;
-
-	struct rw_semaphore subvol_sem;
-	struct srcu_struct subvol_srcu;
-
-	spinlock_t trans_lock;
-	/*
-	 * the reloc mutex goes with the trans lock, it is taken
-	 * during commit to protect us from the relocation code
-	 */
-	struct mutex reloc_mutex;
-
-	struct list_head trans_list;
-	struct list_head hashers;
-	struct list_head dead_roots;
-	struct list_head caching_block_groups;
-
-	spinlock_t delayed_iput_lock;
-	struct list_head delayed_iputs;
-
-	atomic_t nr_async_submits;
-	atomic_t async_submit_draining;
-	atomic_t nr_async_bios;
-	atomic_t async_delalloc_pages;
-	atomic_t open_ioctl_trans;
-
-	/*
-	 * this is used by the balancing code to wait for all the pending
-	 * ordered extents
-	 */
-	spinlock_t ordered_extent_lock;
-
-	/*
-	 * all of the data=ordered extents pending writeback
-	 * these can span multiple transactions and basically include
-	 * every dirty data page that isn't from nodatacow
-	 */
-	struct list_head ordered_extents;
-
-	/*
-	 * all of the inodes that have delalloc bytes.  It is possible for
-	 * this list to be empty even when there is still dirty data=ordered
-	 * extents waiting to finish IO.
-	 */
-	struct list_head delalloc_inodes;
-
-	/*
-	 * special rename and truncate targets that must be on disk before
-	 * we're allowed to commit.  This is basically the ext3 style
-	 * data=ordered list.
-	 */
-	struct list_head ordered_operations;
-
-	/*
-	 * there is a pool of worker threads for checksumming during writes
-	 * and a pool for checksumming after reads.  This is because readers
-	 * can run with FS locks held, and the writers may be waiting for
-	 * those locks.  We don't want ordering in the pending list to cause
-	 * deadlocks, and so the two are serviced separately.
-	 *
-	 * A third pool does submit_bio to avoid deadlocking with the other
-	 * two
-	 */
-	struct btrfs_workers generic_worker;
-	struct btrfs_workers workers;
-	struct btrfs_workers delalloc_workers;
-	struct btrfs_workers endio_workers;
-	struct btrfs_workers endio_meta_workers;
-	struct btrfs_workers endio_meta_write_workers;
-	struct btrfs_workers endio_write_workers;
-	struct btrfs_workers endio_freespace_worker;
-	struct btrfs_workers submit_workers;
-	struct btrfs_workers caching_workers;
-	struct btrfs_workers readahead_workers;
-
-	/*
-	 * fixup workers take dirty pages that didn't properly go through
-	 * the cow mechanism and make them safe to write.  It happens
-	 * for the sys_munmap function call path
-	 */
-	struct btrfs_workers fixup_workers;
-	struct btrfs_workers delayed_workers;
-	struct task_struct *transaction_kthread;
-	struct task_struct *cleaner_kthread;
-	int thread_pool_size;
-
-	struct kobject super_kobj;
-	struct completion kobj_unregister;
-	int do_barriers;
-	int closing;
-	int log_root_recovering;
-	int enospc_unlink;
-	int trans_no_join;
-
-	u64 total_pinned;
-
-	/* protected by the delalloc lock, used to keep from writing
-	 * metadata until there is a nice batch
-	 */
-	u64 dirty_metadata_bytes;
-	struct list_head dirty_cowonly_roots;
-
-	struct btrfs_fs_devices *fs_devices;
-
-	/*
-	 * the space_info list is almost entirely read only.  It only changes
-	 * when we add a new raid type to the FS, and that happens
-	 * very rarely.  RCU is used to protect it.
-	 */
-	struct list_head space_info;
-
-	struct reloc_control *reloc_ctl;
-
-	spinlock_t delalloc_lock;
-	u64 delalloc_bytes;
-
-	/* data_alloc_cluster is only used in ssd mode */
-	struct btrfs_free_cluster data_alloc_cluster;
-
-	/* all metadata allocations go through this cluster */
-	struct btrfs_free_cluster meta_alloc_cluster;
-
-	/* auto defrag inodes go here */
-	spinlock_t defrag_inodes_lock;
-	struct rb_root defrag_inodes;
-	atomic_t defrag_running;
-
-	spinlock_t ref_cache_lock;
-	u64 total_ref_cache_size;
-
-	/*
-	 * these three are in extended format (availability of single
-	 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
-	 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
-	 */
-	u64 avail_data_alloc_bits;
-	u64 avail_metadata_alloc_bits;
-	u64 avail_system_alloc_bits;
-
-	/* restriper state */
-	spinlock_t balance_lock;
-	struct mutex balance_mutex;
-	atomic_t balance_running;
-	atomic_t balance_pause_req;
-	atomic_t balance_cancel_req;
-	struct btrfs_balance_control *balance_ctl;
-	wait_queue_head_t balance_wait_q;
-
-	unsigned data_chunk_allocations;
-	unsigned metadata_ratio;
-
-	void *bdev_holder;
-
-	/* private scrub information */
-	struct mutex scrub_lock;
-	atomic_t scrubs_running;
-	atomic_t scrub_pause_req;
-	atomic_t scrubs_paused;
-	atomic_t scrub_cancel_req;
-	wait_queue_head_t scrub_pause_wait;
-	struct rw_semaphore scrub_super_lock;
-	int scrub_workers_refcnt;
-	struct btrfs_workers scrub_workers;
-
-#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
-	u32 check_integrity_print_mask;
-#endif
-
-	/* filesystem state */
-	u64 fs_state;
-
-	struct btrfs_delayed_root *delayed_root;
-
-	/* readahead tree */
-	spinlock_t reada_lock;
-	struct radix_tree_root reada_tree;
-
-	/* next backup root to be overwritten */
-	int backup_root_index;
-};
-
-/*
- * in ram representation of the tree.  extent_root is used for all allocations
- * and for the extent tree extent_root root.
- */
-struct btrfs_root {
-	struct extent_buffer *node;
-
-	struct extent_buffer *commit_root;
-	struct btrfs_root *log_root;
-	struct btrfs_root *reloc_root;
-
-	struct btrfs_root_item root_item;
-	struct btrfs_key root_key;
-	struct btrfs_fs_info *fs_info;
-	struct extent_io_tree dirty_log_pages;
-
-	struct kobject root_kobj;
-	struct completion kobj_unregister;
-	struct mutex objectid_mutex;
-
-	spinlock_t accounting_lock;
-	struct btrfs_block_rsv *block_rsv;
-
-	/* free ino cache stuff */
-	struct mutex fs_commit_mutex;
-	struct btrfs_free_space_ctl *free_ino_ctl;
-	enum btrfs_caching_type cached;
-	spinlock_t cache_lock;
-	wait_queue_head_t cache_wait;
-	struct btrfs_free_space_ctl *free_ino_pinned;
-	u64 cache_progress;
-	struct inode *cache_inode;
-
-	struct mutex log_mutex;
-	wait_queue_head_t log_writer_wait;
-	wait_queue_head_t log_commit_wait[2];
-	atomic_t log_writers;
-	atomic_t log_commit[2];
-	unsigned long log_transid;
-	unsigned long last_log_commit;
-	unsigned long log_batch;
-	pid_t log_start_pid;
-	bool log_multiple_pids;
-
-	u64 objectid;
-	u64 last_trans;
-
-	/* data allocations are done in sectorsize units */
-	u32 sectorsize;
-
-	/* node allocations are done in nodesize units */
-	u32 nodesize;
-
-	/* leaf allocations are done in leafsize units */
-	u32 leafsize;
-
-	u32 stripesize;
-
-	u32 type;
-
-	u64 highest_objectid;
-
-	/* btrfs_record_root_in_trans is a multi-step process,
-	 * and it can race with the balancing code.   But the
-	 * race is very small, and only the first time the root
-	 * is added to each transaction.  So in_trans_setup
-	 * is used to tell us when more checks are required
-	 */
-	unsigned long in_trans_setup;
-	int ref_cows;
-	int track_dirty;
-	int in_radix;
-
-	u64 defrag_trans_start;
-	struct btrfs_key defrag_progress;
-	struct btrfs_key defrag_max;
-	int defrag_running;
-	char *name;
-
-	/* the dirty list is only used by non-reference counted roots */
-	struct list_head dirty_list;
-
-	struct list_head root_list;
-
-	spinlock_t orphan_lock;
-	struct list_head orphan_list;
-	struct btrfs_block_rsv *orphan_block_rsv;
-	int orphan_item_inserted;
-	int orphan_cleanup_state;
-
-	spinlock_t inode_lock;
-	/* red-black tree that keeps track of in-memory inodes */
-	struct rb_root inode_tree;
-
-	/*
-	 * radix tree that keeps track of delayed nodes of every inode,
-	 * protected by inode_lock
-	 */
-	struct radix_tree_root delayed_nodes_tree;
-	/*
-	 * right now this just gets used so that a root has its own devid
-	 * for stat.  It may be used for more later
-	 */
-	dev_t anon_dev;
-
-	int force_cow;
-};
-
-struct btrfs_ioctl_defrag_range_args {
-	/* start of the defrag operation */
-	__u64 start;
-
-	/* number of bytes to defrag, use (u64)-1 to say all */
-	__u64 len;
-
-	/*
-	 * flags for the operation, which can include turning
-	 * on compression for this one defrag
-	 */
-	__u64 flags;
-
-	/*
-	 * any extent bigger than this will be considered
-	 * already defragged.  Use 0 to take the kernel default
-	 * Use 1 to say every single extent must be rewritten
-	 */
-	__u32 extent_thresh;
-
-	/*
-	 * which compression method to use if turning on compression
-	 * for this defrag operation.  If unspecified, zlib will
-	 * be used
-	 */
-	__u32 compress_type;
-
-	/* spare for later */
-	__u32 unused[4];
-};
-
-
-/*
- * inode items have the data typically returned from stat and store other
- * info about object characteristics.  There is one for every file and dir in
- * the FS
- */
-#define BTRFS_INODE_ITEM_KEY		1
-#define BTRFS_INODE_REF_KEY		12
-#define BTRFS_XATTR_ITEM_KEY		24
-#define BTRFS_ORPHAN_ITEM_KEY		48
-/* reserve 2-15 close to the inode for later flexibility */
-
-/*
- * dir items are the name -> inode pointers in a directory.  There is one
- * for every name in a directory.
- */
-#define BTRFS_DIR_LOG_ITEM_KEY  60
-#define BTRFS_DIR_LOG_INDEX_KEY 72
-#define BTRFS_DIR_ITEM_KEY	84
-#define BTRFS_DIR_INDEX_KEY	96
-/*
- * extent data is for file data
- */
-#define BTRFS_EXTENT_DATA_KEY	108
-
-/*
- * extent csums are stored in a separate tree and hold csums for
- * an entire extent on disk.
- */
-#define BTRFS_EXTENT_CSUM_KEY	128
-
-/*
- * root items point to tree roots.  They are typically in the root
- * tree used by the super block to find all the other trees
- */
-#define BTRFS_ROOT_ITEM_KEY	132
-
-/*
- * root backrefs tie subvols and snapshots to the directory entries that
- * reference them
- */
-#define BTRFS_ROOT_BACKREF_KEY	144
-
-/*
- * root refs make a fast index for listing all of the snapshots and
- * subvolumes referenced by a given root.  They point directly to the
- * directory item in the root that references the subvol
- */
-#define BTRFS_ROOT_REF_KEY	156
-
-/*
- * extent items are in the extent map tree.  These record which blocks
- * are used, and how many references there are to each block
- */
-#define BTRFS_EXTENT_ITEM_KEY	168
-
-#define BTRFS_TREE_BLOCK_REF_KEY	176
-
-#define BTRFS_EXTENT_DATA_REF_KEY	178
-
-#define BTRFS_EXTENT_REF_V0_KEY		180
-
-#define BTRFS_SHARED_BLOCK_REF_KEY	182
-
-#define BTRFS_SHARED_DATA_REF_KEY	184
-
-/*
- * block groups give us hints into the extent allocation trees.  Which
- * blocks are free etc etc
- */
-#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
-
-#define BTRFS_DEV_EXTENT_KEY	204
-#define BTRFS_DEV_ITEM_KEY	216
-#define BTRFS_CHUNK_ITEM_KEY	228
-
-#define BTRFS_BALANCE_ITEM_KEY	248
-
-/*
- * string items are for debugging.  They just store a short string of
- * data in the FS
- */
-#define BTRFS_STRING_ITEM_KEY	253
-
-/*
- * Flags for mount options.
- *
- * Note: don't forget to add new options to btrfs_show_options()
- */
-#define BTRFS_MOUNT_NODATASUM		(1 << 0)
-#define BTRFS_MOUNT_NODATACOW		(1 << 1)
-#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
-#define BTRFS_MOUNT_SSD			(1 << 3)
-#define BTRFS_MOUNT_DEGRADED		(1 << 4)
-#define BTRFS_MOUNT_COMPRESS		(1 << 5)
-#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
-#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
-#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
-#define BTRFS_MOUNT_NOSSD		(1 << 9)
-#define BTRFS_MOUNT_DISCARD		(1 << 10)
-#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
-#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
-#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
-#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
-#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
-#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
-#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
-#define BTRFS_MOUNT_RECOVERY		(1 << 18)
-#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)
-#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)
-#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
-#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)
-
-#define btrfs_clear_opt(o, opt)		((o) &= ~BTRFS_MOUNT_##opt)
-#define btrfs_set_opt(o, opt)		((o) |= BTRFS_MOUNT_##opt)
-#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
-					 BTRFS_MOUNT_##opt)
-/*
- * Inode flags
- */
-#define BTRFS_INODE_NODATASUM		(1 << 0)
-#define BTRFS_INODE_NODATACOW		(1 << 1)
-#define BTRFS_INODE_READONLY		(1 << 2)
-#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
-#define BTRFS_INODE_PREALLOC		(1 << 4)
-#define BTRFS_INODE_SYNC		(1 << 5)
-#define BTRFS_INODE_IMMUTABLE		(1 << 6)
-#define BTRFS_INODE_APPEND		(1 << 7)
-#define BTRFS_INODE_NODUMP		(1 << 8)
-#define BTRFS_INODE_NOATIME		(1 << 9)
-#define BTRFS_INODE_DIRSYNC		(1 << 10)
-#define BTRFS_INODE_COMPRESS		(1 << 11)
-
-#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)
-
-struct btrfs_map_token {
-	struct extent_buffer *eb;
-	char *kaddr;
-	unsigned long offset;
-};
-
-static inline void btrfs_init_map_token (struct btrfs_map_token *token)
-{
-	memset(token, 0, sizeof(*token));
-}
-
-/* some macros to generate set/get funcs for the struct fields.  This
- * assumes there is a lefoo_to_cpu for every type, so lets make a simple
- * one for u8:
- */
-#define le8_to_cpu(v) (v)
-#define cpu_to_le8(v) (v)
-#define __le8 u8
-
-#define read_eb_member(eb, ptr, type, member, result) (			\
-	read_extent_buffer(eb, (char *)(result),			\
-			   ((unsigned long)(ptr)) +			\
-			    offsetof(type, member),			\
-			   sizeof(((type *)0)->member)))
-
-#define write_eb_member(eb, ptr, type, member, result) (		\
-	write_extent_buffer(eb, (char *)(result),			\
-			   ((unsigned long)(ptr)) +			\
-			    offsetof(type, member),			\
-			   sizeof(((type *)0)->member)))
-
-#ifndef BTRFS_SETGET_FUNCS
-#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
-u##bits btrfs_##name(struct extent_buffer *eb, type *s);		\
-u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, struct btrfs_map_token *token);		\
-void btrfs_set_token_##name(struct extent_buffer *eb, type *s, u##bits val, struct btrfs_map_token *token);\
-void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
-#endif
-
-#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
-static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
-{									\
-	type *p = page_address(eb->pages[0]);				\
-	u##bits res = le##bits##_to_cpu(p->member);			\
-	return res;							\
-}									\
-static inline void btrfs_set_##name(struct extent_buffer *eb,		\
-				    u##bits val)			\
-{									\
-	type *p = page_address(eb->pages[0]);				\
-	p->member = cpu_to_le##bits(val);				\
-}
-
-#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits)		\
-static inline u##bits btrfs_##name(type *s)				\
-{									\
-	return le##bits##_to_cpu(s->member);				\
-}									\
-static inline void btrfs_set_##name(type *s, u##bits val)		\
-{									\
-	s->member = cpu_to_le##bits(val);				\
-}
-
-BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
-BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
-BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
-BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
-BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
-BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
-		   start_offset, 64);
-BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
-BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
-BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
-BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
-BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
-BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
-
-BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
-			 total_bytes, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
-			 bytes_used, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
-			 io_align, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
-			 io_width, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
-			 sector_size, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
-			 dev_group, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
-			 seek_speed, 8);
-BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
-			 bandwidth, 8);
-BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
-			 generation, 64);
-
-static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
-{
-	return (char *)d + offsetof(struct btrfs_dev_item, uuid);
-}
-
-static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
-{
-	return (char *)d + offsetof(struct btrfs_dev_item, fsid);
-}
-
-BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
-BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
-BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
-BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
-BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
-BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
-BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
-BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
-BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
-BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
-BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
-
-static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
-{
-	return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
-}
-
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
-			 stripe_len, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
-			 io_align, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
-			 io_width, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
-			 sector_size, 32);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
-			 num_stripes, 16);
-BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
-			 sub_stripes, 16);
-BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
-BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
-
-static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
-						   int nr)
-{
-	unsigned long offset = (unsigned long)c;
-	offset += offsetof(struct btrfs_chunk, stripe);
-	offset += nr * sizeof(struct btrfs_stripe);
-	return (struct btrfs_stripe *)offset;
-}
-
-static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
-{
-	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
-}
-
-static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
-					 struct btrfs_chunk *c, int nr)
-{
-	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
-}
-
-static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
-					 struct btrfs_chunk *c, int nr)
-{
-	return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
-}
-
-/* struct btrfs_block_group_item */
-BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
-			 used, 64);
-BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
-			 used, 64);
-BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
-			struct btrfs_block_group_item, chunk_objectid, 64);
-
-BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
-		   struct btrfs_block_group_item, chunk_objectid, 64);
-BTRFS_SETGET_FUNCS(disk_block_group_flags,
-		   struct btrfs_block_group_item, flags, 64);
-BTRFS_SETGET_STACK_FUNCS(block_group_flags,
-			struct btrfs_block_group_item, flags, 64);
-
-/* struct btrfs_inode_ref */
-BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
-BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
-
-/* struct btrfs_inode_item */
-BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
-BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
-BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
-BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
-BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
-BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
-BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
-BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
-BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
-BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
-BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
-BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
-
-static inline struct btrfs_timespec *
-btrfs_inode_atime(struct btrfs_inode_item *inode_item)
-{
-	unsigned long ptr = (unsigned long)inode_item;
-	ptr += offsetof(struct btrfs_inode_item, atime);
-	return (struct btrfs_timespec *)ptr;
-}
-
-static inline struct btrfs_timespec *
-btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
-{
-	unsigned long ptr = (unsigned long)inode_item;
-	ptr += offsetof(struct btrfs_inode_item, mtime);
-	return (struct btrfs_timespec *)ptr;
-}
-
-static inline struct btrfs_timespec *
-btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
-{
-	unsigned long ptr = (unsigned long)inode_item;
-	ptr += offsetof(struct btrfs_inode_item, ctime);
-	return (struct btrfs_timespec *)ptr;
-}
-
-BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
-BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
-
-/* struct btrfs_dev_extent */
-BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
-		   chunk_tree, 64);
-BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
-		   chunk_objectid, 64);
-BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
-		   chunk_offset, 64);
-BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
-
-static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
-{
-	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
-	return (u8 *)((unsigned long)dev + ptr);
-}
-
-BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
-BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
-		   generation, 64);
-BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
-
-BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
-
-
-BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
-
-static inline void btrfs_tree_block_key(struct extent_buffer *eb,
-					struct btrfs_tree_block_info *item,
-					struct btrfs_disk_key *key)
-{
-	read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
-}
-
-static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
-					    struct btrfs_tree_block_info *item,
-					    struct btrfs_disk_key *key)
-{
-	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
-}
-
-BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
-		   root, 64);
-BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
-		   objectid, 64);
-BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
-		   offset, 64);
-BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
-		   count, 32);
-
-BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
-		   count, 32);
-
-BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
-		   type, 8);
-BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
-		   offset, 64);
-
-static inline u32 btrfs_extent_inline_ref_size(int type)
-{
-	if (type == BTRFS_TREE_BLOCK_REF_KEY ||
-	    type == BTRFS_SHARED_BLOCK_REF_KEY)
-		return sizeof(struct btrfs_extent_inline_ref);
-	if (type == BTRFS_SHARED_DATA_REF_KEY)
-		return sizeof(struct btrfs_shared_data_ref) +
-		       sizeof(struct btrfs_extent_inline_ref);
-	if (type == BTRFS_EXTENT_DATA_REF_KEY)
-		return sizeof(struct btrfs_extent_data_ref) +
-		       offsetof(struct btrfs_extent_inline_ref, offset);
-	BUG();
-	return 0;
-}
-
-BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
-BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
-		   generation, 64);
-BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
-BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
-
-/* struct btrfs_node */
-BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
-BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
-
-static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
-{
-	unsigned long ptr;
-	ptr = offsetof(struct btrfs_node, ptrs) +
-		sizeof(struct btrfs_key_ptr) * nr;
-	return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
-}
-
-static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
-					   int nr, u64 val)
-{
-	unsigned long ptr;
-	ptr = offsetof(struct btrfs_node, ptrs) +
-		sizeof(struct btrfs_key_ptr) * nr;
-	btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
-}
-
-static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
-{
-	unsigned long ptr;
-	ptr = offsetof(struct btrfs_node, ptrs) +
-		sizeof(struct btrfs_key_ptr) * nr;
-	return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
-}
-
-static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
-						 int nr, u64 val)
-{
-	unsigned long ptr;
-	ptr = offsetof(struct btrfs_node, ptrs) +
-		sizeof(struct btrfs_key_ptr) * nr;
-	btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
-}
-
-static inline unsigned long btrfs_node_key_ptr_offset(int nr)
-{
-	return offsetof(struct btrfs_node, ptrs) +
-		sizeof(struct btrfs_key_ptr) * nr;
-}
-
-void btrfs_node_key(struct extent_buffer *eb,
-		    struct btrfs_disk_key *disk_key, int nr);
-
-static inline void btrfs_set_node_key(struct extent_buffer *eb,
-				      struct btrfs_disk_key *disk_key, int nr)
-{
-	unsigned long ptr;
-	ptr = btrfs_node_key_ptr_offset(nr);
-	write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
-		       struct btrfs_key_ptr, key, disk_key);
-}
-
-/* struct btrfs_item */
-BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
-BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
-
-static inline unsigned long btrfs_item_nr_offset(int nr)
-{
-	return offsetof(struct btrfs_leaf, items) +
-		sizeof(struct btrfs_item) * nr;
-}
-
-static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
-					       int nr)
-{
-	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
-}
-
-static inline u32 btrfs_item_end(struct extent_buffer *eb,
-				 struct btrfs_item *item)
-{
-	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
-}
-
-static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
-{
-	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
-}
-
-static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
-{
-	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
-}
-
-static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
-{
-	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
-}
-
-static inline void btrfs_item_key(struct extent_buffer *eb,
-			   struct btrfs_disk_key *disk_key, int nr)
-{
-	struct btrfs_item *item = btrfs_item_nr(eb, nr);
-	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
-}
-
-static inline void btrfs_set_item_key(struct extent_buffer *eb,
-			       struct btrfs_disk_key *disk_key, int nr)
-{
-	struct btrfs_item *item = btrfs_item_nr(eb, nr);
-	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
-}
-
-BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
-
-/*
- * struct btrfs_root_ref
- */
-BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
-BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
-BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
-
-/* struct btrfs_dir_item */
-BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
-BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
-BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
-BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
-
-static inline void btrfs_dir_item_key(struct extent_buffer *eb,
-				      struct btrfs_dir_item *item,
-				      struct btrfs_disk_key *key)
-{
-	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
-}
-
-static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
-					  struct btrfs_dir_item *item,
-					  struct btrfs_disk_key *key)
-{
-	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
-}
-
-BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
-		   num_entries, 64);
-BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
-		   num_bitmaps, 64);
-BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
-		   generation, 64);
-
-static inline void btrfs_free_space_key(struct extent_buffer *eb,
-					struct btrfs_free_space_header *h,
-					struct btrfs_disk_key *key)
-{
-	read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
-}
-
-static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
-					    struct btrfs_free_space_header *h,
-					    struct btrfs_disk_key *key)
-{
-	write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
-}
-
-/* struct btrfs_disk_key */
-BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
-			 objectid, 64);
-BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
-BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
-
-static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
-					 struct btrfs_disk_key *disk)
-{
-	cpu->offset = le64_to_cpu(disk->offset);
-	cpu->type = disk->type;
-	cpu->objectid = le64_to_cpu(disk->objectid);
-}
-
-static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
-					 struct btrfs_key *cpu)
-{
-	disk->offset = cpu_to_le64(cpu->offset);
-	disk->type = cpu->type;
-	disk->objectid = cpu_to_le64(cpu->objectid);
-}
-
-static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
-				  struct btrfs_key *key, int nr)
-{
-	struct btrfs_disk_key disk_key;
-	btrfs_node_key(eb, &disk_key, nr);
-	btrfs_disk_key_to_cpu(key, &disk_key);
-}
-
-static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
-				  struct btrfs_key *key, int nr)
-{
-	struct btrfs_disk_key disk_key;
-	btrfs_item_key(eb, &disk_key, nr);
-	btrfs_disk_key_to_cpu(key, &disk_key);
-}
-
-static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
-				      struct btrfs_dir_item *item,
-				      struct btrfs_key *key)
-{
-	struct btrfs_disk_key disk_key;
-	btrfs_dir_item_key(eb, item, &disk_key);
-	btrfs_disk_key_to_cpu(key, &disk_key);
-}
-
-
-static inline u8 btrfs_key_type(struct btrfs_key *key)
-{
-	return key->type;
-}
-
-static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
-{
-	key->type = val;
-}
-
-/* struct btrfs_header */
-BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
-BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
-			  generation, 64);
-BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
-BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
-BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
-BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
-
-static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
-{
-	return (btrfs_header_flags(eb) & flag) == flag;
-}
-
-static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
-{
-	u64 flags = btrfs_header_flags(eb);
-	btrfs_set_header_flags(eb, flags | flag);
-	return (flags & flag) == flag;
-}
-
-static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
-{
-	u64 flags = btrfs_header_flags(eb);
-	btrfs_set_header_flags(eb, flags & ~flag);
-	return (flags & flag) == flag;
-}
-
-static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
-{
-	u64 flags = btrfs_header_flags(eb);
-	return flags >> BTRFS_BACKREF_REV_SHIFT;
-}
-
-static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
-						int rev)
-{
-	u64 flags = btrfs_header_flags(eb);
-	flags &= ~BTRFS_BACKREF_REV_MASK;
-	flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
-	btrfs_set_header_flags(eb, flags);
-}
-
-static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
-{
-	unsigned long ptr = offsetof(struct btrfs_header, fsid);
-	return (u8 *)ptr;
-}
-
-static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
-{
-	unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
-	return (u8 *)ptr;
-}
-
-static inline int btrfs_is_leaf(struct extent_buffer *eb)
-{
-	return btrfs_header_level(eb) == 0;
-}
-
-/* struct btrfs_root_item */
-BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
-		   generation, 64);
-BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
-BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
-BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
-
-BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
-			 generation, 64);
-BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
-BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
-BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
-BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
-BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
-BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
-BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
-BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
-			 last_snapshot, 64);
-
-static inline bool btrfs_root_readonly(struct btrfs_root *root)
-{
-	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
-}
-
-/* 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);
-
-/* struct btrfs_balance_item */
-BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
-
-static inline void btrfs_balance_data(struct extent_buffer *eb,
-				      struct btrfs_balance_item *bi,
-				      struct btrfs_disk_balance_args *ba)
-{
-	read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
-}
-
-static inline void btrfs_set_balance_data(struct extent_buffer *eb,
-					  struct btrfs_balance_item *bi,
-					  struct btrfs_disk_balance_args *ba)
-{
-	write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
-}
-
-static inline void btrfs_balance_meta(struct extent_buffer *eb,
-				      struct btrfs_balance_item *bi,
-				      struct btrfs_disk_balance_args *ba)
-{
-	read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
-}
-
-static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
-					  struct btrfs_balance_item *bi,
-					  struct btrfs_disk_balance_args *ba)
-{
-	write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
-}
-
-static inline void btrfs_balance_sys(struct extent_buffer *eb,
-				     struct btrfs_balance_item *bi,
-				     struct btrfs_disk_balance_args *ba)
-{
-	read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
-}
-
-static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
-					 struct btrfs_balance_item *bi,
-					 struct btrfs_disk_balance_args *ba)
-{
-	write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
-}
-
-static inline void
-btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
-			       struct btrfs_disk_balance_args *disk)
-{
-	memset(cpu, 0, sizeof(*cpu));
-
-	cpu->profiles = le64_to_cpu(disk->profiles);
-	cpu->usage = le64_to_cpu(disk->usage);
-	cpu->devid = le64_to_cpu(disk->devid);
-	cpu->pstart = le64_to_cpu(disk->pstart);
-	cpu->pend = le64_to_cpu(disk->pend);
-	cpu->vstart = le64_to_cpu(disk->vstart);
-	cpu->vend = le64_to_cpu(disk->vend);
-	cpu->target = le64_to_cpu(disk->target);
-	cpu->flags = le64_to_cpu(disk->flags);
-}
-
-static inline void
-btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
-			       struct btrfs_balance_args *cpu)
-{
-	memset(disk, 0, sizeof(*disk));
-
-	disk->profiles = cpu_to_le64(cpu->profiles);
-	disk->usage = cpu_to_le64(cpu->usage);
-	disk->devid = cpu_to_le64(cpu->devid);
-	disk->pstart = cpu_to_le64(cpu->pstart);
-	disk->pend = cpu_to_le64(cpu->pend);
-	disk->vstart = cpu_to_le64(cpu->vstart);
-	disk->vend = cpu_to_le64(cpu->vend);
-	disk->target = cpu_to_le64(cpu->target);
-	disk->flags = cpu_to_le64(cpu->flags);
-}
-
-/* struct btrfs_super_block */
-BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
-BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
-BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
-			 generation, 64);
-BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
-BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
-			 struct btrfs_super_block, sys_chunk_array_size, 32);
-BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
-			 struct btrfs_super_block, chunk_root_generation, 64);
-BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
-			 root_level, 8);
-BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
-			 chunk_root, 64);
-BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
-			 chunk_root_level, 8);
-BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
-			 log_root, 64);
-BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
-			 log_root_transid, 64);
-BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
-			 log_root_level, 8);
-BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
-			 total_bytes, 64);
-BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
-			 bytes_used, 64);
-BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
-			 sectorsize, 32);
-BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
-			 nodesize, 32);
-BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
-			 leafsize, 32);
-BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
-			 stripesize, 32);
-BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
-			 root_dir_objectid, 64);
-BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
-			 num_devices, 64);
-BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
-			 compat_flags, 64);
-BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
-			 compat_ro_flags, 64);
-BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
-			 incompat_flags, 64);
-BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
-			 csum_type, 16);
-BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
-			 cache_generation, 64);
-
-static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
-{
-	int t = btrfs_super_csum_type(s);
-	BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
-	return btrfs_csum_sizes[t];
-}
-
-static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
-{
-	return offsetof(struct btrfs_leaf, items);
-}
-
-/* struct btrfs_file_extent_item */
-BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
-
-static inline unsigned long
-btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
-{
-	unsigned long offset = (unsigned long)e;
-	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
-	return offset;
-}
-
-static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
-{
-	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
-}
-
-BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
-		   disk_bytenr, 64);
-BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
-		   generation, 64);
-BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
-		   disk_num_bytes, 64);
-BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
-		  offset, 64);
-BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
-		   num_bytes, 64);
-BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
-		   ram_bytes, 64);
-BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
-		   compression, 8);
-BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
-		   encryption, 8);
-BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
-		   other_encoding, 16);
-
-/* this returns the number of file bytes represented by the inline item.
- * If an item is compressed, this is the uncompressed size
- */
-static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
-					       struct btrfs_file_extent_item *e)
-{
-	return btrfs_file_extent_ram_bytes(eb, e);
-}
-
-/*
- * this returns the number of bytes used by the item on disk, minus the
- * size of any extent headers.  If a file is compressed on disk, this is
- * the compressed size
- */
-static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
-						    struct btrfs_item *e)
-{
-	unsigned long offset;
-	offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
-	return btrfs_item_size(eb, e) - offset;
-}
-
-static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
-{
-	if (level == 0)
-		return root->leafsize;
-	return root->nodesize;
-}
-
-/* helper function to cast into the data area of the leaf. */
-#define btrfs_item_ptr(leaf, slot, type) \
-	((type *)(btrfs_leaf_data(leaf) + \
-	btrfs_item_offset_nr(leaf, slot)))
-
-#define btrfs_item_ptr_offset(leaf, slot) \
-	((unsigned long)(btrfs_leaf_data(leaf) + \
-	btrfs_item_offset_nr(leaf, slot)))
-
-static inline struct dentry *fdentry(struct file *file)
-{
-	return file->f_path.dentry;
-}
-
-static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
-{
-	return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
-		(space_info->flags & BTRFS_BLOCK_GROUP_DATA));
-}
-
-static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
-{
-	return mapping_gfp_mask(mapping) & ~__GFP_FS;
-}
-
-/* extent-tree.c */
-static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
-						 unsigned num_items)
-{
-	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
-		3 * num_items;
-}
-
-/*
- * Doing a truncate won't result in new nodes or leaves, just what we need for
- * COW.
- */
-static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
-						 unsigned num_items)
-{
-	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
-		num_items;
-}
-
-void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
-int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root, unsigned long count);
-int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
-int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root, u64 bytenr,
-			     u64 num_bytes, u64 *refs, u64 *flags);
-int btrfs_pin_extent(struct btrfs_root *root,
-		     u64 bytenr, u64 num, int reserved);
-int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
-				    struct btrfs_root *root,
-				    u64 bytenr, u64 num_bytes);
-int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root,
-			  u64 objectid, u64 offset, u64 bytenr);
-struct btrfs_block_group_cache *btrfs_lookup_block_group(
-						 struct btrfs_fs_info *info,
-						 u64 bytenr);
-void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
-u64 btrfs_find_block_group(struct btrfs_root *root,
-			   u64 search_start, u64 search_hint, int owner);
-struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
-					struct btrfs_root *root, u32 blocksize,
-					u64 parent, u64 root_objectid,
-					struct btrfs_disk_key *key, int level,
-					u64 hint, u64 empty_size, int for_cow);
-void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root,
-			   struct extent_buffer *buf,
-			   u64 parent, int last_ref, int for_cow);
-struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
-					    struct btrfs_root *root,
-					    u64 bytenr, u32 blocksize,
-					    int level);
-int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
-				     struct btrfs_root *root,
-				     u64 root_objectid, u64 owner,
-				     u64 offset, struct btrfs_key *ins);
-int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
-				   struct btrfs_root *root,
-				   u64 root_objectid, u64 owner, u64 offset,
-				   struct btrfs_key *ins);
-int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
-				  struct btrfs_root *root,
-				  u64 num_bytes, u64 min_alloc_size,
-				  u64 empty_size, u64 hint_byte,
-				  struct btrfs_key *ins, u64 data);
-int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		  struct extent_buffer *buf, int full_backref, int for_cow);
-int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		  struct extent_buffer *buf, int full_backref, int for_cow);
-int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
-				struct btrfs_root *root,
-				u64 bytenr, u64 num_bytes, u64 flags,
-				int is_data);
-int btrfs_free_extent(struct btrfs_trans_handle *trans,
-		      struct btrfs_root *root,
-		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
-		      u64 owner, u64 offset, int for_cow);
-
-int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
-int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
-				       u64 start, u64 len);
-void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
-				 struct btrfs_root *root);
-int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
-			       struct btrfs_root *root);
-int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
-			 struct btrfs_root *root,
-			 u64 bytenr, u64 num_bytes, u64 parent,
-			 u64 root_objectid, u64 owner, u64 offset, int for_cow);
-
-int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
-				    struct btrfs_root *root);
-int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
-int btrfs_free_block_groups(struct btrfs_fs_info *info);
-int btrfs_read_block_groups(struct btrfs_root *root);
-int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
-int btrfs_make_block_group(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root, u64 bytes_used,
-			   u64 type, u64 chunk_objectid, u64 chunk_offset,
-			   u64 size);
-int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root, u64 group_start);
-u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
-u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
-void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
-void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
-int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
-void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
-void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
-				struct btrfs_root *root);
-int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
-				  struct inode *inode);
-void btrfs_orphan_release_metadata(struct inode *inode);
-int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
-				struct btrfs_pending_snapshot *pending);
-int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
-void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
-int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
-void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
-void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
-struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
-void btrfs_free_block_rsv(struct btrfs_root *root,
-			  struct btrfs_block_rsv *rsv);
-int btrfs_block_rsv_add(struct btrfs_root *root,
-			struct btrfs_block_rsv *block_rsv,
-			u64 num_bytes);
-int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
-				struct btrfs_block_rsv *block_rsv,
-				u64 num_bytes);
-int btrfs_block_rsv_check(struct btrfs_root *root,
-			  struct btrfs_block_rsv *block_rsv, int min_factor);
-int btrfs_block_rsv_refill(struct btrfs_root *root,
-			  struct btrfs_block_rsv *block_rsv,
-			  u64 min_reserved);
-int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
-				   struct btrfs_block_rsv *block_rsv,
-				   u64 min_reserved);
-int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
-			    struct btrfs_block_rsv *dst_rsv,
-			    u64 num_bytes);
-void btrfs_block_rsv_release(struct btrfs_root *root,
-			     struct btrfs_block_rsv *block_rsv,
-			     u64 num_bytes);
-int btrfs_set_block_group_ro(struct btrfs_root *root,
-			     struct btrfs_block_group_cache *cache);
-void btrfs_set_block_group_rw(struct btrfs_root *root,
-			      struct btrfs_block_group_cache *cache);
-void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
-u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
-int btrfs_error_unpin_extent_range(struct btrfs_root *root,
-				   u64 start, u64 end);
-int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
-			       u64 num_bytes, u64 *actual_bytes);
-int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
-			    struct btrfs_root *root, u64 type);
-int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
-
-int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
-/* ctree.c */
-int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
-		     int level, int *slot);
-int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
-int btrfs_previous_item(struct btrfs_root *root,
-			struct btrfs_path *path, u64 min_objectid,
-			int type);
-void btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root, struct btrfs_path *path,
-			     struct btrfs_key *new_key);
-struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
-struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
-int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
-			struct btrfs_key *key, int lowest_level,
-			int cache_only, u64 min_trans);
-int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
-			 struct btrfs_key *max_key,
-			 struct btrfs_path *path, int cache_only,
-			 u64 min_trans);
-int btrfs_cow_block(struct btrfs_trans_handle *trans,
-		    struct btrfs_root *root, struct extent_buffer *buf,
-		    struct extent_buffer *parent, int parent_slot,
-		    struct extent_buffer **cow_ret);
-int btrfs_copy_root(struct btrfs_trans_handle *trans,
-		      struct btrfs_root *root,
-		      struct extent_buffer *buf,
-		      struct extent_buffer **cow_ret, u64 new_root_objectid);
-int btrfs_block_can_be_shared(struct btrfs_root *root,
-			      struct extent_buffer *buf);
-void btrfs_extend_item(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *root, struct btrfs_path *path,
-		       u32 data_size);
-void btrfs_truncate_item(struct btrfs_trans_handle *trans,
-			 struct btrfs_root *root,
-			 struct btrfs_path *path,
-			 u32 new_size, int from_end);
-int btrfs_split_item(struct btrfs_trans_handle *trans,
-		     struct btrfs_root *root,
-		     struct btrfs_path *path,
-		     struct btrfs_key *new_key,
-		     unsigned long split_offset);
-int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
-			 struct btrfs_root *root,
-			 struct btrfs_path *path,
-			 struct btrfs_key *new_key);
-int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
-		      *root, struct btrfs_key *key, struct btrfs_path *p, int
-		      ins_len, int cow);
-int btrfs_realloc_node(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *root, struct extent_buffer *parent,
-		       int start_slot, int cache_only, u64 *last_ret,
-		       struct btrfs_key *progress);
-void btrfs_release_path(struct btrfs_path *p);
-struct btrfs_path *btrfs_alloc_path(void);
-void btrfs_free_path(struct btrfs_path *p);
-void btrfs_set_path_blocking(struct btrfs_path *p);
-void btrfs_clear_path_blocking(struct btrfs_path *p,
-			       struct extent_buffer *held, int held_rw);
-void btrfs_unlock_up_safe(struct btrfs_path *p, int level);
-
-int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		   struct btrfs_path *path, int slot, int nr);
-static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
-				 struct btrfs_root *root,
-				 struct btrfs_path *path)
-{
-	return btrfs_del_items(trans, root, path, path->slots[0], 1);
-}
-
-void setup_items_for_insert(struct btrfs_trans_handle *trans,
-			    struct btrfs_root *root, struct btrfs_path *path,
-			    struct btrfs_key *cpu_key, u32 *data_size,
-			    u32 total_data, u32 total_size, int nr);
-int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
-		      *root, struct btrfs_key *key, void *data, u32 data_size);
-int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root,
-			     struct btrfs_path *path,
-			     struct btrfs_key *cpu_key, u32 *data_size, int nr);
-
-static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
-					  struct btrfs_root *root,
-					  struct btrfs_path *path,
-					  struct btrfs_key *key,
-					  u32 data_size)
-{
-	return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
-}
-
-int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
-static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
-{
-	++p->slots[0];
-	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
-		return btrfs_next_leaf(root, p);
-	return 0;
-}
-int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
-int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
-int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
-				     struct btrfs_block_rsv *block_rsv,
-				     int update_ref, int for_reloc);
-int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
-			struct btrfs_root *root,
-			struct extent_buffer *node,
-			struct extent_buffer *parent);
-static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
-{
-	/*
-	 * Get synced with close_ctree()
-	 */
-	smp_mb();
-	return fs_info->closing;
-}
-static inline void free_fs_info(struct btrfs_fs_info *fs_info)
-{
-	kfree(fs_info->balance_ctl);
-	kfree(fs_info->delayed_root);
-	kfree(fs_info->extent_root);
-	kfree(fs_info->tree_root);
-	kfree(fs_info->chunk_root);
-	kfree(fs_info->dev_root);
-	kfree(fs_info->csum_root);
-	kfree(fs_info->super_copy);
-	kfree(fs_info->super_for_commit);
-	kfree(fs_info);
-}
-
-/* root-item.c */
-int btrfs_find_root_ref(struct btrfs_root *tree_root,
-			struct btrfs_path *path,
-			u64 root_id, u64 ref_id);
-int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *tree_root,
-		       u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
-		       const char *name, int name_len);
-int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *tree_root,
-		       u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
-		       const char *name, int name_len);
-int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
-		   struct btrfs_key *key);
-int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
-		      *root, struct btrfs_key *key, struct btrfs_root_item
-		      *item);
-int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
-				   struct btrfs_root *root,
-				   struct btrfs_key *key,
-				   struct btrfs_root_item *item);
-int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
-			 btrfs_root_item *item, struct btrfs_key *key);
-int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
-int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
-void btrfs_set_root_node(struct btrfs_root_item *item,
-			 struct extent_buffer *node);
-void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
-
-/* dir-item.c */
-int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root, const char *name,
-			  int name_len, struct inode *dir,
-			  struct btrfs_key *location, u8 type, u64 index);
-struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
-					     struct btrfs_root *root,
-					     struct btrfs_path *path, u64 dir,
-					     const char *name, int name_len,
-					     int mod);
-struct btrfs_dir_item *
-btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
-			    struct btrfs_root *root,
-			    struct btrfs_path *path, u64 dir,
-			    u64 objectid, const char *name, int name_len,
-			    int mod);
-struct btrfs_dir_item *
-btrfs_search_dir_index_item(struct btrfs_root *root,
-			    struct btrfs_path *path, u64 dirid,
-			    const char *name, int name_len);
-struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
-			      struct btrfs_path *path,
-			      const char *name, int name_len);
-int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
-			      struct btrfs_root *root,
-			      struct btrfs_path *path,
-			      struct btrfs_dir_item *di);
-int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
-			    struct btrfs_root *root,
-			    struct btrfs_path *path, u64 objectid,
-			    const char *name, u16 name_len,
-			    const void *data, u16 data_len);
-struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
-					  struct btrfs_root *root,
-					  struct btrfs_path *path, u64 dir,
-					  const char *name, u16 name_len,
-					  int mod);
-int verify_dir_item(struct btrfs_root *root,
-		    struct extent_buffer *leaf,
-		    struct btrfs_dir_item *dir_item);
-
-/* orphan.c */
-int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root, u64 offset);
-int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root, u64 offset);
-int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
-
-/* inode-item.c */
-int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root,
-			   const char *name, int name_len,
-			   u64 inode_objectid, u64 ref_objectid, u64 index);
-int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root,
-			   const char *name, int name_len,
-			   u64 inode_objectid, u64 ref_objectid, u64 *index);
-struct btrfs_inode_ref *
-btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
-			struct btrfs_root *root,
-			struct btrfs_path *path,
-			const char *name, int name_len,
-			u64 inode_objectid, u64 ref_objectid, int mod);
-int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root,
-			     struct btrfs_path *path, u64 objectid);
-int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
-		       *root, struct btrfs_path *path,
-		       struct btrfs_key *location, int mod);
-
-/* file-item.c */
-int btrfs_del_csums(struct btrfs_trans_handle *trans,
-		    struct btrfs_root *root, u64 bytenr, u64 len);
-int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
-			  struct bio *bio, u32 *dst);
-int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
-			      struct bio *bio, u64 logical_offset, u32 *dst);
-int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root,
-			     u64 objectid, u64 pos,
-			     u64 disk_offset, u64 disk_num_bytes,
-			     u64 num_bytes, u64 offset, u64 ram_bytes,
-			     u8 compression, u8 encryption, u16 other_encoding);
-int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *root,
-			     struct btrfs_path *path, u64 objectid,
-			     u64 bytenr, int mod);
-int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root,
-			   struct btrfs_ordered_sum *sums);
-int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
-		       struct bio *bio, u64 file_start, int contig);
-struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
-					  struct btrfs_root *root,
-					  struct btrfs_path *path,
-					  u64 bytenr, int cow);
-int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
-			struct btrfs_root *root, struct btrfs_path *path,
-			u64 isize);
-int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
-			     struct list_head *list, int search_commit);
-/* inode.c */
-struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
-					   size_t pg_offset, u64 start, u64 len,
-					   int create);
-
-/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
-#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
-#define ClearPageChecked ClearPageFsMisc
-#define SetPageChecked SetPageFsMisc
-#define PageChecked PageFsMisc
-#endif
-
-/* This forces readahead on a given range of bytes in an inode */
-static inline void btrfs_force_ra(struct address_space *mapping,
-				  struct file_ra_state *ra, struct file *file,
-				  pgoff_t offset, unsigned long req_size)
-{
-	page_cache_sync_readahead(mapping, ra, file, offset, req_size);
-}
-
-struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
-int btrfs_set_inode_index(struct inode *dir, u64 *index);
-int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
-		       struct btrfs_root *root,
-		       struct inode *dir, struct inode *inode,
-		       const char *name, int name_len);
-int btrfs_add_link(struct btrfs_trans_handle *trans,
-		   struct inode *parent_inode, struct inode *inode,
-		   const char *name, int name_len, int add_backref, u64 index);
-int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
-			struct btrfs_root *root,
-			struct inode *dir, u64 objectid,
-			const char *name, int name_len);
-int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
-			       struct btrfs_root *root,
-			       struct inode *inode, u64 new_size,
-			       u32 min_type);
-
-int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
-int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
-			      struct extent_state **cached_state);
-int btrfs_writepages(struct address_space *mapping,
-		     struct writeback_control *wbc);
-int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
-			     struct btrfs_root *new_root, u64 new_dirid);
-int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
-			 size_t size, struct bio *bio, unsigned long bio_flags);
-
-int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
-int btrfs_readpage(struct file *file, struct page *page);
-void btrfs_evict_inode(struct inode *inode);
-int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
-int btrfs_dirty_inode(struct inode *inode);
-int btrfs_update_time(struct file *file);
-struct inode *btrfs_alloc_inode(struct super_block *sb);
-void btrfs_destroy_inode(struct inode *inode);
-int btrfs_drop_inode(struct inode *inode);
-int btrfs_init_cachep(void);
-void btrfs_destroy_cachep(void);
-long btrfs_ioctl_trans_end(struct file *file);
-struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
-			 struct btrfs_root *root, int *was_new);
-struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
-				    size_t pg_offset, u64 start, u64 end,
-				    int create);
-int btrfs_update_inode(struct btrfs_trans_handle *trans,
-			      struct btrfs_root *root,
-			      struct inode *inode);
-int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
-int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
-int btrfs_orphan_cleanup(struct btrfs_root *root);
-void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
-			      struct btrfs_root *root);
-int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
-void btrfs_invalidate_inodes(struct btrfs_root *root);
-void btrfs_add_delayed_iput(struct inode *inode);
-void btrfs_run_delayed_iputs(struct btrfs_root *root);
-int btrfs_prealloc_file_range(struct inode *inode, int mode,
-			      u64 start, u64 num_bytes, u64 min_size,
-			      loff_t actual_len, u64 *alloc_hint);
-int btrfs_prealloc_file_range_trans(struct inode *inode,
-				    struct btrfs_trans_handle *trans, int mode,
-				    u64 start, u64 num_bytes, u64 min_size,
-				    loff_t actual_len, u64 *alloc_hint);
-extern const struct dentry_operations btrfs_dentry_operations;
-
-/* ioctl.c */
-long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-void btrfs_update_iflags(struct inode *inode);
-void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
-int btrfs_defrag_file(struct inode *inode, struct file *file,
-		      struct btrfs_ioctl_defrag_range_args *range,
-		      u64 newer_than, unsigned long max_pages);
-/* file.c */
-int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
-			   struct inode *inode);
-int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
-int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
-int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
-			    int skip_pinned);
-extern const struct file_operations btrfs_file_operations;
-int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
-		       u64 start, u64 end, u64 *hint_byte, int drop_cache);
-int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
-			      struct inode *inode, u64 start, u64 end);
-int btrfs_release_file(struct inode *inode, struct file *file);
-void btrfs_drop_pages(struct page **pages, size_t num_pages);
-int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
-		      struct page **pages, size_t num_pages,
-		      loff_t pos, size_t write_bytes,
-		      struct extent_state **cached);
-
-/* tree-defrag.c */
-int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
-			struct btrfs_root *root, int cache_only);
-
-/* sysfs.c */
-int btrfs_init_sysfs(void);
-void btrfs_exit_sysfs(void);
-
-/* xattr.c */
-ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
-
-/* super.c */
-int btrfs_parse_options(struct btrfs_root *root, char *options);
-int btrfs_sync_fs(struct super_block *sb, int wait);
-void btrfs_printk(struct btrfs_fs_info *fs_info, const char *fmt, ...);
-void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
-		     unsigned int line, int errno, const char *fmt, ...);
-
-void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
-			       struct btrfs_root *root, const char *function,
-			       unsigned int line, int errno);
-
-#define btrfs_abort_transaction(trans, root, errno)		\
-do {								\
-	__btrfs_abort_transaction(trans, root, __func__,	\
-				  __LINE__, errno);		\
-} while (0)
-
-#define btrfs_std_error(fs_info, errno)				\
-do {								\
-	if ((errno))						\
-		__btrfs_std_error((fs_info), __func__,		\
-				   __LINE__, (errno), NULL);	\
-} while (0)
-
-#define btrfs_error(fs_info, errno, fmt, args...)		\
-do {								\
-	__btrfs_std_error((fs_info), __func__, __LINE__,	\
-			  (errno), fmt, ##args);		\
-} while (0)
-
-void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
-		   unsigned int line, int errno, const char *fmt, ...);
-
-#define btrfs_panic(fs_info, errno, fmt, args...)			\
-do {									\
-	struct btrfs_fs_info *_i = (fs_info);				\
-	__btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args);	\
-	BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR));	\
-} while (0)
-
-/* acl.c */
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
-struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
-int btrfs_init_acl(struct btrfs_trans_handle *trans,
-		   struct inode *inode, struct inode *dir);
-int btrfs_acl_chmod(struct inode *inode);
-#else
-#define btrfs_get_acl NULL
-static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
-				 struct inode *inode, struct inode *dir)
-{
-	return 0;
-}
-static inline int btrfs_acl_chmod(struct inode *inode)
-{
-	return 0;
-}
-#endif
-
-/* relocation.c */
-int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
-int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
-			  struct btrfs_root *root);
-int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
-			    struct btrfs_root *root);
-int btrfs_recover_relocation(struct btrfs_root *root);
-int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
-void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
-			   struct btrfs_root *root, struct extent_buffer *buf,
-			   struct extent_buffer *cow);
-void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
-			      struct btrfs_pending_snapshot *pending,
-			      u64 *bytes_to_reserve);
-int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
-			      struct btrfs_pending_snapshot *pending);
-
-/* scrub.c */
-int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
-		    struct btrfs_scrub_progress *progress, int readonly);
-void btrfs_scrub_pause(struct btrfs_root *root);
-void btrfs_scrub_pause_super(struct btrfs_root *root);
-void btrfs_scrub_continue(struct btrfs_root *root);
-void btrfs_scrub_continue_super(struct btrfs_root *root);
-int __btrfs_scrub_cancel(struct btrfs_fs_info *info);
-int btrfs_scrub_cancel(struct btrfs_root *root);
-int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
-int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
-int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
-			 struct btrfs_scrub_progress *progress);
-
-/* reada.c */
-struct reada_control {
-	struct btrfs_root	*root;		/* tree to prefetch */
-	struct btrfs_key	key_start;
-	struct btrfs_key	key_end;	/* exclusive */
-	atomic_t		elems;
-	struct kref		refcnt;
-	wait_queue_head_t	wait;
-};
-struct reada_control *btrfs_reada_add(struct btrfs_root *root,
-			      struct btrfs_key *start, struct btrfs_key *end);
-int btrfs_reada_wait(void *handle);
-void btrfs_reada_detach(void *handle);
-int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
-			 u64 start, int err);
-
-#endif