ctree.h 65.9 KB
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/*
 * 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.
 */

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#ifndef __BTRFS_CTREE__
#define __BTRFS_CTREE__
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#include <linux/version.h>
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#include <linux/mm.h>
#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <linux/wait.h>
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#include <asm/kmap_types.h>
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#include "extent_io.h"
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#include "extent_map.h"
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#include "async-thread.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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extern struct kmem_cache *btrfs_trans_handle_cachep;
extern struct kmem_cache *btrfs_transaction_cachep;
extern struct kmem_cache *btrfs_bit_radix_cachep;
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extern struct kmem_cache *btrfs_path_cachep;
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struct btrfs_ordered_sum;
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#define BTRFS_MAGIC "_BFRfS_M"
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#define BTRFS_ACL_NOT_CACHED    ((void *)-1)

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#ifdef CONFIG_LOCKDEP
# define BTRFS_MAX_LEVEL 7
#else
# define BTRFS_MAX_LEVEL 8
#endif
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/* holds pointers to all of the tree roots */
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#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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/* stores information about which extents are in use, and reference counts */
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#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
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/*
 * chunk tree stores translations from logical -> physical block numbering
 * the super block points to the chunk tree
 */
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#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
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/*
 * 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
 */
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#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
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/* orhpan objectid for tracking unlinked/truncated files */
#define BTRFS_ORPHAN_OBJECTID -5ULL

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/* does write ahead logging to speed up fsyncs */
#define BTRFS_TREE_LOG_OBJECTID -6ULL
#define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL

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/* for space balancing */
#define BTRFS_TREE_RELOC_OBJECTID -8ULL
#define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL

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/* dummy objectid represents multiple objectids */
#define BTRFS_MULTIPLE_OBJECTIDS -255ULL

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/*
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 * All files have objectids in this range.
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 */
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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#define BTRFS_LAST_FREE_OBJECTID -256ULL
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#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
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/*
 * 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

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/*
 * we can actually store much bigger names, but lets not confuse the rest
 * of linux
 */
#define BTRFS_NAME_LEN 255

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/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
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/* four bytes for CRC32 */
#define BTRFS_CRC32_SIZE 4
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#define BTRFS_EMPTY_DIR_SIZE 0
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#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
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#define BTRFS_FT_XATTR		8
#define BTRFS_FT_MAX		9
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/*
 * the key defines the order in the tree, and so it also defines (optimal)
 * block layout.  objectid corresonds to the inode number.  The flags
 * tells us things about the object, and is a kind of stream selector.
 * so for a given inode, keys with flags of 1 might refer to the inode
 * data, flags of 2 may point to file data in the btree and flags == 3
 * may point to extents.
 *
 * offset is the starting byte offset for this key in the stream.
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 *
 * 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)
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 */
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struct btrfs_disk_key {
	__le64 objectid;
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	u8 type;
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	__le64 offset;
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} __attribute__ ((__packed__));

struct btrfs_key {
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	u64 objectid;
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	u8 type;
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	u64 offset;
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} __attribute__ ((__packed__));

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struct btrfs_mapping_tree {
	struct extent_map_tree map_tree;
};

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#define BTRFS_UUID_SIZE 16
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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;

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	/* expected generation for this device */
	__le64 generation;

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	/* 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;

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	/* btrfs generated uuid for this device */
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	u8 uuid[BTRFS_UUID_SIZE];
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	/* uuid of FS who owns this device */
	u8 fsid[BTRFS_UUID_SIZE];
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} __attribute__ ((__packed__));

struct btrfs_stripe {
	__le64 devid;
	__le64 offset;
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	u8 dev_uuid[BTRFS_UUID_SIZE];
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} __attribute__ ((__packed__));

struct btrfs_chunk {
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	/* size of this chunk in bytes */
	__le64 length;

	/* objectid of the root referencing this chunk */
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	__le64 owner;
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	__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;
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	/* sub stripes only matter for raid10 */
	__le16 sub_stripes;
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	struct btrfs_stripe stripe;
	/* additional stripes go here */
} __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);
}

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#define BTRFS_FSID_SIZE 16
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#define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)

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/*
 * every tree block (leaf or node) starts with this header.
 */
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struct btrfs_header {
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	/* these first four must match the super block */
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	u8 csum[BTRFS_CSUM_SIZE];
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	u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
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	__le64 bytenr; /* which block this node is supposed to live in */
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	__le64 flags;
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	/* allowed to be different from the super from here on down */
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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	__le64 generation;
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	__le64 owner;
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	__le32 nritems;
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	u8 level;
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} __attribute__ ((__packed__));

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#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
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			        sizeof(struct btrfs_header)) / \
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			        sizeof(struct btrfs_key_ptr))
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#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
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#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
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#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
					sizeof(struct btrfs_item) - \
					sizeof(struct btrfs_file_extent_item))
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#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
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/*
 * 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
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#define BTRFS_LABEL_SIZE 256
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/*
 * the super block basically lists the main trees of the FS
 * it currently lacks any block count etc etc
 */
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struct btrfs_super_block {
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	u8 csum[BTRFS_CSUM_SIZE];
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	/* the first 4 fields must match struct btrfs_header */
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	u8 fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
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	__le64 bytenr; /* this block number */
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	__le64 flags;
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	/* allowed to be different from the btrfs_header from here own down */
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	__le64 magic;
	__le64 generation;
	__le64 root;
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	__le64 chunk_root;
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	__le64 log_root;
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	__le64 total_bytes;
	__le64 bytes_used;
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	__le64 root_dir_objectid;
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	__le64 num_devices;
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	__le32 sectorsize;
	__le32 nodesize;
	__le32 leafsize;
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	__le32 stripesize;
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	__le32 sys_chunk_array_size;
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	__le64 chunk_root_generation;
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	u8 root_level;
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	u8 chunk_root_level;
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	u8 log_root_level;
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	struct btrfs_dev_item dev_item;
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	char label[BTRFS_LABEL_SIZE];
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	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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} __attribute__ ((__packed__));

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/*
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 * A leaf is full of items. offset and size tell us where to find
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 * the item in the leaf (relative to the start of the data area)
 */
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struct btrfs_item {
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	struct btrfs_disk_key key;
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	__le32 offset;
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	__le32 size;
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} __attribute__ ((__packed__));

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/*
 * 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.
 */
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struct btrfs_leaf {
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	struct btrfs_header header;
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	struct btrfs_item items[];
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} __attribute__ ((__packed__));

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/*
 * all non-leaf blocks are nodes, they hold only keys and pointers to
 * other blocks
 */
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struct btrfs_key_ptr {
	struct btrfs_disk_key key;
	__le64 blockptr;
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	__le64 generation;
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} __attribute__ ((__packed__));

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struct btrfs_node {
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	struct btrfs_header header;
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	struct btrfs_key_ptr ptrs[];
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} __attribute__ ((__packed__));

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/*
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 * btrfs_paths remember the path taken from the root down to the leaf.
 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
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 * to any other levels that are present.
 *
 * The slots array records the index of the item or block pointer
 * used while walking the tree.
 */
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struct btrfs_path {
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	struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
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	int slots[BTRFS_MAX_LEVEL];
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	/* if there is real range locking, this locks field will change */
	int locks[BTRFS_MAX_LEVEL];
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	int reada;
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	/* keep some upper locks as we walk down */
	int keep_locks;
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	int skip_locking;
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	int lowest_level;
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};
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/*
 * 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 {
	__le32 refs;
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} __attribute__ ((__packed__));

struct btrfs_extent_ref {
	__le64 root;
	__le64 generation;
	__le64 objectid;
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	__le32 num_refs;
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} __attribute__ ((__packed__));

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/* dev extents record free space on individual devices.  The owner
 * field points back to the chunk allocation mapping tree that allocated
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 * the extent.  The chunk tree uuid field is a way to double check the owner
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 */
struct btrfs_dev_extent {
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	__le64 chunk_tree;
	__le64 chunk_objectid;
	__le64 chunk_offset;
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	__le64 length;
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	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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} __attribute__ ((__packed__));

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struct btrfs_inode_ref {
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	__le64 index;
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	__le16 name_len;
	/* name goes here */
} __attribute__ ((__packed__));

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struct btrfs_timespec {
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	__le64 sec;
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	__le32 nsec;
} __attribute__ ((__packed__));

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typedef enum {
	BTRFS_COMPRESS_NONE = 0,
	BTRFS_COMPRESS_ZLIB = 1,
	BTRFS_COMPRESS_LAST = 2,
} btrfs_compression_type;

/* we don't understand any encryption methods right now */
typedef enum {
	BTRFS_ENCRYPTION_NONE = 0,
	BTRFS_ENCRYPTION_LAST = 1,
} btrfs_encryption_type;

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struct btrfs_inode_item {
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	/* nfs style generation number */
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	__le64 generation;
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	/* transid that last touched this inode */
	__le64 transid;
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	__le64 size;
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	__le64 nbytes;
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	__le64 block_group;
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	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
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	__le64 rdev;
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	__le16 flags;
	__le16 compat_flags;
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	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
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} __attribute__ ((__packed__));

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struct btrfs_dir_log_item {
	__le64 end;
} __attribute__ ((__packed__));

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struct btrfs_dir_item {
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	struct btrfs_disk_key location;
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	__le64 transid;
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	__le16 data_len;
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	__le16 name_len;
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	u8 type;
} __attribute__ ((__packed__));

struct btrfs_root_item {
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	struct btrfs_inode_item inode;
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	__le64 generation;
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	__le64 root_dirid;
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	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
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	__le32 flags;
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	__le32 refs;
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	struct btrfs_disk_key drop_progress;
	u8 drop_level;
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	u8 level;
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} __attribute__ ((__packed__));
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/*
 * this is used for both forward and backward root refs
 */
struct btrfs_root_ref {
	__le64 dirid;
	__le64 sequence;
	__le16 name_len;
} __attribute__ ((__packed__));

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#define BTRFS_FILE_EXTENT_INLINE 0
#define BTRFS_FILE_EXTENT_REG 1
#define BTRFS_FILE_EXTENT_PREALLOC 2
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struct btrfs_file_extent_item {
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	/*
	 * transaction id that created this extent
	 */
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	__le64 generation;
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	/*
	 * 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? */
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	u8 type;
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	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
	 */
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	__le64 disk_bytenr;
	__le64 disk_num_bytes;
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	/*
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	 * the logical offset in file blocks (no csums)
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	 * 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;
	/*
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	 * the logical number of file blocks (no csums included).  This
	 * always reflects the size uncompressed and without encoding.
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	 */
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	__le64 num_bytes;
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} __attribute__ ((__packed__));

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struct btrfs_csum_item {
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	u8 csum;
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} __attribute__ ((__packed__));

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/* different types of block groups (and chunks) */
#define BTRFS_BLOCK_GROUP_DATA     (1 << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM   (1 << 1)
#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
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#define BTRFS_BLOCK_GROUP_RAID0    (1 << 3)
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#define BTRFS_BLOCK_GROUP_RAID1    (1 << 4)
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#define BTRFS_BLOCK_GROUP_DUP	   (1 << 5)
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#define BTRFS_BLOCK_GROUP_RAID10   (1 << 6)
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struct btrfs_block_group_item {
	__le64 used;
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	__le64 chunk_objectid;
	__le64 flags;
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} __attribute__ ((__packed__));

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struct btrfs_space_info {
	u64 flags;
	u64 total_bytes;
	u64 bytes_used;
	u64 bytes_pinned;
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	u64 bytes_reserved;
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	u64 bytes_readonly;
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	int full;
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	int force_alloc;
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	struct list_head list;
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	/* for block groups in our same type */
	struct list_head block_groups;
	spinlock_t lock;
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	struct rw_semaphore groups_sem;
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};

struct btrfs_free_space {
	struct rb_node bytes_index;
	struct rb_node offset_index;
	u64 offset;
	u64 bytes;
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};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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	spinlock_t lock;
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	struct mutex alloc_mutex;
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	u64 pinned;
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	u64 reserved;
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	u64 flags;
	int cached;
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	int ro;
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	int dirty;

	struct btrfs_space_info *space_info;

	/* free space cache stuff */
	struct rb_root free_space_bytes;
	struct rb_root free_space_offset;

	/* block group cache stuff */
	struct rb_node cache_node;

	/* for block groups in the same raid type */
	struct list_head list;
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};
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struct btrfs_leaf_ref_tree {
	struct rb_root root;
	struct list_head list;
	spinlock_t lock;
};

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struct btrfs_device;
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struct btrfs_fs_devices;
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struct btrfs_fs_info {
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	u8 fsid[BTRFS_FSID_SIZE];
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	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
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	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
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	struct btrfs_root *fs_root;
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	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
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	struct radix_tree_root fs_roots_radix;
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	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
	struct rb_root block_group_cache_tree;

628 629 630
	struct extent_io_tree pinned_extents;
	struct extent_io_tree pending_del;
	struct extent_io_tree extent_ins;
631

632 633 634
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

635
	u64 generation;
636
	u64 last_trans_committed;
637
	u64 last_trans_new_blockgroup;
638
	u64 open_ioctl_trans;
639
	unsigned long mount_opt;
640
	u64 max_extent;
641
	u64 max_inline;
642
	u64 alloc_start;
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	struct btrfs_transaction *running_transaction;
644
	wait_queue_head_t transaction_throttle;
645
	wait_queue_head_t transaction_wait;
646

647
	wait_queue_head_t async_submit_wait;
648 649
	wait_queue_head_t tree_log_wait;

650
	struct btrfs_super_block super_copy;
651
	struct btrfs_super_block super_for_commit;
652
	struct block_device *__bdev;
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	struct super_block *sb;
654
	struct inode *btree_inode;
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655
	struct backing_dev_info bdi;
656
	spinlock_t hash_lock;
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	struct mutex trans_mutex;
658
	struct mutex tree_log_mutex;
659 660
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
661 662
	struct mutex extent_ins_mutex;
	struct mutex pinned_mutex;
663
	struct mutex chunk_mutex;
664
	struct mutex drop_mutex;
665
	struct mutex volume_mutex;
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	struct mutex tree_reloc_mutex;
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	struct list_head trans_list;
668
	struct list_head hashers;
669
	struct list_head dead_roots;
670

671
	atomic_t nr_async_submits;
672
	atomic_t async_submit_draining;
673
	atomic_t nr_async_bios;
674
	atomic_t async_delalloc_pages;
675 676 677 678
	atomic_t tree_log_writers;
	atomic_t tree_log_commit;
	unsigned long tree_log_batch;
	u64 tree_log_transid;
679

680 681 682 683 684 685
	/*
	 * this is used by the balancing code to wait for all the pending
	 * ordered extents
	 */
	spinlock_t ordered_extent_lock;
	struct list_head ordered_extents;
686
	struct list_head delalloc_inodes;
687

688 689 690 691 692 693
	/*
	 * 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.
694 695 696
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
697 698
	 */
	struct btrfs_workers workers;
699
	struct btrfs_workers delalloc_workers;
700
	struct btrfs_workers endio_workers;
701
	struct btrfs_workers endio_write_workers;
702
	struct btrfs_workers submit_workers;
703 704 705 706 707 708
	/*
	 * 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;
709 710
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
711
	int thread_pool_size;
712

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	/* tree relocation relocated fields */
	struct list_head dead_reloc_roots;
	struct btrfs_leaf_ref_tree reloc_ref_tree;
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	struct btrfs_leaf_ref_tree shared_ref_tree;

718 719
	struct kobject super_kobj;
	struct completion kobj_unregister;
720
	int do_barriers;
721
	int closing;
722
	int log_root_recovering;
723
	atomic_t throttles;
724
	atomic_t throttle_gen;
725

726
	u64 total_pinned;
727 728
	struct list_head dirty_cowonly_roots;

729
	struct btrfs_fs_devices *fs_devices;
730
	struct list_head space_info;
731
	spinlock_t delalloc_lock;
732
	spinlock_t new_trans_lock;
733
	u64 delalloc_bytes;
734
	u64 last_alloc;
735
	u64 last_data_alloc;
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	spinlock_t ref_cache_lock;
	u64 total_ref_cache_size;

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	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
	u64 data_alloc_profile;
	u64 metadata_alloc_profile;
	u64 system_alloc_profile;
746 747

	void *bdev_holder;
748
};
749

750 751
/*
 * in ram representation of the tree.  extent_root is used for all allocations
752
 * and for the extent tree extent_root root.
753
 */
754
struct btrfs_dirty_root;
755
struct btrfs_root {
756
	struct extent_buffer *node;
757 758 759 760

	/* the node lock is held while changing the node pointer */
	spinlock_t node_lock;

761
	struct extent_buffer *commit_root;
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	struct btrfs_leaf_ref_tree *ref_tree;
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	struct btrfs_leaf_ref_tree ref_tree_struct;
764
	struct btrfs_dirty_root *dirty_root;
765
	struct btrfs_root *log_root;
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	struct btrfs_root *reloc_root;
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768 769
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
770
	struct btrfs_fs_info *fs_info;
771 772
	struct extent_io_tree dirty_log_pages;

773 774
	struct kobject root_kobj;
	struct completion kobj_unregister;
775
	struct mutex objectid_mutex;
776
	struct mutex log_mutex;
777

778 779
	u64 objectid;
	u64 last_trans;
780 781 782 783 784 785 786 787 788 789

	/* 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;

790 791
	u32 stripesize;

792
	u32 type;
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	u64 highest_inode;
	u64 last_inode_alloc;
795
	int ref_cows;
796
	int track_dirty;
797
	u64 defrag_trans_start;
798
	struct btrfs_key defrag_progress;
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	struct btrfs_key defrag_max;
800 801
	int defrag_running;
	int defrag_level;
802
	char *name;
803
	int in_sysfs;
804 805 806

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
807

808 809
	spinlock_t list_lock;
	struct list_head dead_list;
810
	struct list_head orphan_list;
811 812 813 814 815 816

	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
	struct super_block anon_super;
817 818
};

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/*
820

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 * 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
 */
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#define BTRFS_INODE_ITEM_KEY		1
826 827 828
#define BTRFS_INODE_REF_KEY		12
#define BTRFS_XATTR_ITEM_KEY		24
#define BTRFS_ORPHAN_ITEM_KEY		48
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/* reserve 2-15 close to the inode for later flexibility */
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/*
 * dir items are the name -> inode pointers in a directory.  There is one
 * for every name in a directory.
 */
835 836 837 838
#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
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/*
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 * extent data is for file data
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 */
842
#define BTRFS_EXTENT_DATA_KEY	108
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/*
 * csum items have the checksums for data in the extents
 */
846
#define BTRFS_CSUM_ITEM_KEY	120
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848 849

/* reserve 21-31 for other file/dir stuff */
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/*
 * root items point to tree roots.  There are typically in the root
 * tree used by the super block to find all the other trees
 */
855 856 857 858 859 860 861 862 863 864 865 866 867 868 869
#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

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/*
 * extent items are in the extent map tree.  These record which blocks
 * are used, and how many references there are to each block
 */
874 875
#define BTRFS_EXTENT_ITEM_KEY	168
#define BTRFS_EXTENT_REF_KEY	180
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/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
881
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
882

883 884 885
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
886

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/*
 * string items are for debugging.  They just store a short string of
 * data in the FS
 */
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#define BTRFS_STRING_ITEM_KEY	253

893 894 895
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
896
#define BTRFS_MOUNT_SSD			(1 << 3)
897
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
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#define BTRFS_MOUNT_COMPRESS		(1 << 5)
899 900 901 902 903

#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)
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/*
 * Inode flags
 */
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#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
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#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
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#define BTRFS_INODE_PREALLOC		(1 << 4)
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#define btrfs_clear_flag(inode, flag)	(BTRFS_I(inode)->flags &= \
					 ~BTRFS_INODE_##flag)
#define btrfs_set_flag(inode, flag)	(BTRFS_I(inode)->flags |= \
					 BTRFS_INODE_##flag)
#define btrfs_test_flag(inode, flag)	(BTRFS_I(inode)->flags & \
					 BTRFS_INODE_##flag)
918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
/* 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)))

938
#ifndef BTRFS_SETGET_FUNCS
939
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
940 941 942
u##bits btrfs_##name(struct extent_buffer *eb, type *s);		\
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
#endif
943 944 945 946

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
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	type *p = kmap_atomic(eb->first_page, KM_USER0);		\
	u##bits res = le##bits##_to_cpu(p->member);			\
	kunmap_atomic(p, KM_USER0);					\
950
	return res;							\
951 952 953 954
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
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	type *p = kmap_atomic(eb->first_page, KM_USER0);		\
	p->member = cpu_to_le##bits(val);				\
	kunmap_atomic(p, KM_USER0);					\
958
}
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960 961 962 963 964 965 966 967
#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);				\
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}

970 971 972 973 974 975 976
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_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
977 978 979
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);
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BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
981

982 983 984 985 986 987 988 989 990 991 992 993
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);
994 995 996 997 998 999
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);
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BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);
1002

1003 1004 1005 1006 1007
static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
{
	return (char *)d + offsetof(struct btrfs_dev_item, uuid);
}

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static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
{
	return (char *)d + offsetof(struct btrfs_dev_item, fsid);
}

1013
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1014 1015 1016 1017 1018 1019 1020
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);
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BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1022 1023 1024
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

1025 1026 1027 1028 1029 1030
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);
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042
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);
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BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
			 sub_stripes, 16);
1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056
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;
}

1057 1058 1059 1060 1061
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
}

static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
					     struct btrfs_chunk *c, int nr,
					     u64 val)
{
	btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
}

static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
}

static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
					     struct btrfs_chunk *c, int nr,
					     u64 val)
{
	btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
}

1088 1089 1090 1091 1092
/* 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);
1093 1094
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
1095 1096

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1097 1098 1099 1100 1101
		   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);
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1103 1104
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1105
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1106

1107 1108
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1109
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1110
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1111
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1112 1113 1114 1115 1116
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);
1117
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1118 1119 1120
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
		   compat_flags, 16);
C
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1121

1122
static inline struct btrfs_timespec *
1123
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
C
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1124
{
1125 1126
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, atime);
1127
	return (struct btrfs_timespec *)ptr;
C
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1128 1129
}

1130
static inline struct btrfs_timespec *
1131
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
1132
{
1133 1134
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, mtime);
1135
	return (struct btrfs_timespec *)ptr;
C
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1136 1137
}

1138
static inline struct btrfs_timespec *
1139
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
1140
{
1141 1142
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, ctime);
1143
	return (struct btrfs_timespec *)ptr;
C
Chris Mason 已提交
1144 1145
}

1146
static inline struct btrfs_timespec *
1147
btrfs_inode_otime(struct btrfs_inode_item *inode_item)
C
Chris Mason 已提交
1148
{
1149 1150
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, otime);
1151
	return (struct btrfs_timespec *)ptr;
C
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1152 1153
}

1154 1155
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
C
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1156

1157
/* struct btrfs_dev_extent */
1158 1159 1160 1161 1162 1163
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);
1164 1165
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

1166 1167 1168 1169 1170 1171
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);
}

1172 1173 1174 1175
/* struct btrfs_extent_ref */
BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
Z
Zheng Yan 已提交
1176
BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1177

1178 1179
BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1180
			 generation, 64);
1181 1182
BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
			 objectid, 64);
Z
Zheng Yan 已提交
1183 1184
BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
			 num_refs, 32);
C
Chris Mason 已提交
1185

Z
Zheng Yan 已提交
1186 1187
/* struct btrfs_extent_item */
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1188 1189
BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
			 refs, 32);
C
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1190

1191 1192
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1193
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
C
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1194

1195
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
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1196
{
1197 1198 1199 1200
	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);
C
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1201 1202
}

1203 1204
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
Chris Mason 已提交
1205
{
1206 1207 1208 1209
	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);
C
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1210 1211
}

1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
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);
}

1229
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1230
{
1231 1232
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
1233 1234
}

1235 1236 1237
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

1238 1239
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
1240
{
1241 1242 1243 1244
	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);
1245 1246
}

1247 1248 1249
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1250

1251
static inline unsigned long btrfs_item_nr_offset(int nr)
1252
{
1253 1254
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
1255 1256
}

1257 1258
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
					       int nr)
C
Chris Mason 已提交
1259
{
1260
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
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1261 1262
}

1263 1264
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
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1265
{
1266
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
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1267 1268
}

1269
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
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1270
{
1271
	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
C
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1272 1273
}

1274
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
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1275
{
1276
	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
C
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1277 1278
}

1279
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
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1280
{
1281
	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
C
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1282 1283
}

1284 1285
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
1286
{
1287 1288
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1289 1290
}

1291 1292
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
1293
{
1294 1295
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1296 1297
}

1298 1299
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

1300 1301 1302 1303 1304 1305 1306
/*
 * 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);

1307
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
1308
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1309 1310
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1311
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1312

1313 1314 1315
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
1316
{
1317
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1318 1319
}

1320 1321 1322
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
1323
{
1324
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1325 1326
}

1327 1328 1329 1330 1331
/* 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);
1332

C
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1333 1334 1335 1336
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
1337
	cpu->type = disk->type;
C
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1338 1339 1340 1341 1342 1343 1344
	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);
1345
	disk->type = cpu->type;
C
Chris Mason 已提交
1346 1347 1348
	disk->objectid = cpu_to_le64(cpu->objectid);
}

1349 1350
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1351
{
1352 1353 1354
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1355 1356
}

1357 1358
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1359
{
1360 1361 1362
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1363 1364
}

1365 1366 1367
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
1368
{
1369 1370 1371
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
1372 1373
}

1374

1375
static inline u8 btrfs_key_type(struct btrfs_key *key)
1376
{
1377
	return key->type;
1378 1379
}

1380
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1381
{
1382
	key->type = val;
1383 1384
}

1385
/* struct btrfs_header */
1386
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1387 1388 1389 1390
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);
1391
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1392
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1393

1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412
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;
}

1413
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1414
{
1415 1416
	unsigned long ptr = offsetof(struct btrfs_header, fsid);
	return (u8 *)ptr;
1417 1418
}

1419 1420 1421 1422 1423 1424
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;
}

1425
static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1426
{
1427 1428
	unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
	return (u8 *)ptr;
1429 1430
}

1431
static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1432
{
1433 1434
	unsigned long ptr = offsetof(struct btrfs_header, csum);
	return (u8 *)ptr;
1435 1436
}

1437
static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1438
{
1439
	return NULL;
1440 1441
}

1442
static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1443
{
1444
	return NULL;
1445 1446
}

1447
static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1448
{
1449
	return NULL;
1450 1451
}

1452
static inline int btrfs_is_leaf(struct extent_buffer *eb)
1453
{
1454
	return (btrfs_header_level(eb) == 0);
1455 1456
}

1457
/* struct btrfs_root_item */
1458 1459
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
1460
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1461 1462
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1463

1464 1465
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
1466 1467
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1468 1469 1470
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, 32);
1471 1472
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);
Y
Yan Zheng 已提交
1473 1474
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
C
Chris Mason 已提交
1475

1476
/* struct btrfs_super_block */
1477
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1478
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1479 1480 1481
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1482 1483
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
1484 1485
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
1486 1487
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
1488 1489 1490
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,
1491 1492 1493 1494 1495
			 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_level, struct btrfs_super_block,
			 log_root_level, 8);
1496 1497 1498 1499
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);
1500 1501 1502 1503 1504 1505
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);
1506 1507
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
1508 1509
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
1510 1511
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
1512

1513
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1514
{
1515
	return offsetof(struct btrfs_leaf, items);
1516 1517
}

1518 1519
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1520

1521
static inline unsigned long btrfs_file_extent_inline_start(struct
1522 1523
						   btrfs_file_extent_item *e)
{
1524
	unsigned long offset = (unsigned long)e;
1525
	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1526
	return offset;
1527 1528 1529 1530
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
1531
	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1532 1533
}

1534 1535
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
1536 1537
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
1538 1539
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
1540 1541
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
1542 1543
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
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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;
}
1574

C
Chris Mason 已提交
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static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
static inline int btrfs_set_root_name(struct btrfs_root *root,
				      const char *name, int len)
{
	/* if we already have a name just free it */
	if (root->name)
		kfree(root->name);

	root->name = kmalloc(len+1, GFP_KERNEL);
	if (!root->name)
		return -ENOMEM;

	memcpy(root->name, name, len);
	root->name[len] ='\0';

	return 0;
}

1597 1598 1599 1600 1601 1602
static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
	if (level == 0)
		return root->leafsize;
	return root->nodesize;
}

1603 1604
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
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	((type *)(btrfs_leaf_data(leaf) + \
1606 1607 1608 1609 1610
	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)))
1611

1612 1613
static inline struct dentry *fdentry(struct file *file)
{
1614 1615 1616
	return file->f_path.dentry;
}

C
Chris Mason 已提交
1617
/* extent-tree.c */
Z
Zheng Yan 已提交
1618
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1619 1620 1621
int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 bytenr,
			    u64 num_bytes, u32 *refs);
1622 1623 1624 1625
int btrfs_update_pinned_extents(struct btrfs_root *root,
				u64 bytenr, u64 num, int pin);
int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct extent_buffer *leaf);
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Yan Zheng 已提交
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int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, u64 bytenr);
1628 1629
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root);
1630
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1631 1632
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
							 btrfs_fs_info *info,
1633
							 u64 bytenr);
1634 1635
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
						 struct btrfs_block_group_cache
C
Chris Mason 已提交
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						 *hint, u64 search_start,
1637
						 int data, int owner);
1638
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1639
					     struct btrfs_root *root,
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Zheng Yan 已提交
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					     u32 blocksize, u64 parent,
1641 1642 1643 1644 1645
					     u64 root_objectid,
					     u64 ref_generation,
					     int level,
					     u64 hint,
					     u64 empty_size);
1646 1647 1648
struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
					    struct btrfs_root *root,
					    u64 bytenr, u32 blocksize);
1649
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1650
		       struct btrfs_root *root,
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Zheng Yan 已提交
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		       u64 num_bytes, u64 parent, u64 min_bytes,
1652
		       u64 root_objectid, u64 ref_generation,
1653
		       u64 owner, u64 empty_size, u64 hint_byte,
1654
		       u64 search_end, struct btrfs_key *ins, u64 data);
1655
int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
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				struct btrfs_root *root, u64 parent,
1657
				u64 root_objectid, u64 ref_generation,
1658
				u64 owner, struct btrfs_key *ins);
1659
int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
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				struct btrfs_root *root, u64 parent,
1661
				u64 root_objectid, u64 ref_generation,
1662
				u64 owner, struct btrfs_key *ins);
1663 1664 1665 1666 1667 1668
int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
				  struct btrfs_root *root,
				  u64 num_bytes, u64 min_alloc_size,
				  u64 empty_size, u64 hint_byte,
				  u64 search_end, struct btrfs_key *ins,
				  u64 data);
1669
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
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Zheng Yan 已提交
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		  struct extent_buffer *orig_buf, struct extent_buffer *buf,
		  u32 *nr_extents);
int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		    struct extent_buffer *buf, u32 nr_extents);
int btrfs_update_ref(struct btrfs_trans_handle *trans,
		     struct btrfs_root *root, struct extent_buffer *orig_buf,
		     struct extent_buffer *buf, int start_slot, int nr);
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
		      u64 bytenr, u64 num_bytes, u64 parent,
1680
		      u64 root_objectid, u64 ref_generation,
1681
		      u64 owner_objectid, int pin);
1682
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
C
Chris Mason 已提交
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int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
1685
			       struct extent_io_tree *unpin);
C
Chris Mason 已提交
1686
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
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Zheng Yan 已提交
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			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
			 u64 root_objectid, u64 ref_generation,
1690
			 u64 owner_objectid);
Z
Zheng Yan 已提交
1691 1692 1693 1694
int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 bytenr,
			    u64 orig_parent, u64 parent,
			    u64 root_objectid, u64 ref_generation,
1695
			    u64 owner_objectid);
C
Chris Mason 已提交
1696 1697 1698 1699
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
1700 1701
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
1702
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
1703
			   u64 size);
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Zheng Yan 已提交
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int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 group_start);
int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
Y
Yan Zheng 已提交
1707 1708
int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root);
Z
Zheng Yan 已提交
1709 1710 1711 1712 1713 1714
int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct extent_buffer *buf, u64 orig_start);
int btrfs_add_dead_reloc_root(struct btrfs_root *root);
int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
Y
Yan Zheng 已提交
1715
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
C
Chris Mason 已提交
1716
/* ctree.c */
1717 1718 1719
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
Z
Zheng Yan 已提交
1720 1721 1722 1723
int btrfs_merge_path(struct btrfs_trans_handle *trans,
		     struct btrfs_root *root,
		     struct btrfs_key *node_keys,
		     u64 *nodes, int lowest_level);
Z
Zheng Yan 已提交
1724 1725 1726
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, struct btrfs_path *path,
			    struct btrfs_key *new_key);
1727 1728
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1729
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1730 1731 1732
			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,
1733
			 struct btrfs_key *max_key,
1734 1735
			 struct btrfs_path *path, int cache_only,
			 u64 min_trans);
1736 1737 1738
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
1739
		    struct extent_buffer **cow_ret, u64 prealloc_dest);
1740 1741 1742 1743
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);
1744 1745
int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_path *path, u32 data_size);
C
Chris Mason 已提交
1746 1747 1748
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_path *path,
1749
			u32 new_size, int from_end);
1750 1751 1752
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);
1753
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1754
		       struct btrfs_root *root, struct extent_buffer *parent,
1755 1756
		       int start_slot, int cache_only, u64 *last_ret,
		       struct btrfs_key *progress);
C
Chris Mason 已提交
1757
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
C
Chris Mason 已提交
1758 1759
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
C
Chris Mason 已提交
1760
void btrfs_init_path(struct btrfs_path *p);
1761 1762
int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_path *path, int slot, int nr);
1763 1764 1765
int btrfs_del_leaf(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 bytenr);
1766 1767 1768 1769 1770 1771 1772
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);
}

1773 1774
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
1775 1776 1777 1778 1779
int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path,
			    struct btrfs_key *cpu_key, u32 *data_size,
			    int nr);
1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
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);
}

C
Chris Mason 已提交
1794
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1795
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1796
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1797
int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1798
			*root);
Y
Yan Zheng 已提交
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int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
C
Chris Mason 已提交
1803
/* root-item.c */
1804 1805 1806
int btrfs_find_root_ref(struct btrfs_root *tree_root,
		   struct btrfs_path *path,
		   u64 root_id, u64 ref_id);
1807 1808 1809 1810 1811
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
		       u64 root_id, u8 type, u64 ref_id,
		       u64 dirid, u64 sequence,
		       const char *name, int name_len);
1812 1813 1814 1815 1816 1817 1818 1819 1820 1821
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_key *key);
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, struct btrfs_root_item
		      *item);
int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, struct btrfs_root_item
		      *item);
int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
			 btrfs_root_item *item, struct btrfs_key *key);
1822 1823
int btrfs_search_root(struct btrfs_root *root, u64 search_start,
		      u64 *found_objectid);
1824 1825
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
			  struct btrfs_root *latest_root);
C
Chris Mason 已提交
1826
/* dir-item.c */
1827
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1828
			  *root, const char *name, int name_len, u64 dir,
1829
			  struct btrfs_key *location, u8 type, u64 index);
1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
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_match_dir_item_name(struct btrfs_root *root,
			      struct btrfs_path *path,
1843
			      const char *name, int name_len);
1844 1845 1846 1847
int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct btrfs_path *path,
			      struct btrfs_dir_item *di);
J
Josef Bacik 已提交
1848 1849 1850 1851 1852 1853 1854 1855 1856
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, const char *name,
			    u16 name_len, const void *data, u16 data_len,
			    u64 dir);
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);
1857 1858 1859 1860 1861 1862 1863

/* 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);

C
Chris Mason 已提交
1864
/* inode-map.c */
1865 1866 1867
int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
			     struct btrfs_root *fs_root,
			     u64 dirid, u64 *objectid);
C
Chris Mason 已提交
1868 1869
int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);

C
Chris Mason 已提交
1870
/* inode-item.c */
1871 1872 1873
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
1874
			   u64 inode_objectid, u64 ref_objectid, u64 index);
1875 1876 1877
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
1878
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
1879 1880 1881
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
1882
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1883 1884
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
1885 1886

/* file-item.c */
1887 1888
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
			  struct bio *bio);
C
Chris Mason 已提交
1889
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
1890 1891 1892 1893 1894
			     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);
C
Chris Mason 已提交
1895 1896 1897
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
1898
			     u64 bytenr, int mod);
1899 1900
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, struct inode *inode,
1901
			   struct btrfs_ordered_sum *sums);
1902 1903
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
		       struct bio *bio);
C
Chris Mason 已提交
1904 1905
int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
			  u64 start, unsigned long len);
C
Chris Mason 已提交
1906 1907 1908 1909 1910
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
					  u64 objectid, u64 offset,
					  int cow);
C
Chris Mason 已提交
1911 1912 1913
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct btrfs_path *path,
			u64 isize);
C
Chris Mason 已提交
1914
/* inode.c */
1915 1916

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1917
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1918 1919 1920 1921 1922
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

1923 1924
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936
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_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct inode *inode, u64 new_size,
			       u32 min_type);

1937 1938
int btrfs_start_delalloc_inodes(struct btrfs_root *root);
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1939 1940
int btrfs_writepages(struct address_space *mapping,
		     struct writeback_control *wbc);
1941
int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
C
Christoph Hellwig 已提交
1942 1943 1944
		struct btrfs_trans_handle *trans, u64 new_dirid,
		struct btrfs_block_group_cache *block_group);

1945
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
C
Chris Mason 已提交
1946
			 size_t size, struct bio *bio, unsigned long bio_flags);
1947

1948 1949 1950
unsigned long btrfs_force_ra(struct address_space *mapping,
			      struct file_ra_state *ra, struct file *file,
			      pgoff_t offset, pgoff_t last_index);
1951 1952
int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
			   int for_del);
C
Chris Mason 已提交
1953 1954
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
int btrfs_readpage(struct file *file, struct page *page);
C
Chris Mason 已提交
1955
void btrfs_delete_inode(struct inode *inode);
1956
void btrfs_put_inode(struct inode *inode);
C
Chris Mason 已提交
1957 1958 1959 1960 1961 1962 1963
void btrfs_read_locked_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, int wait);
void btrfs_dirty_inode(struct inode *inode);
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
1964
long btrfs_ioctl_trans_end(struct file *file);
1965 1966
struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
			    struct btrfs_root *root, int wait);
C
Chris Mason 已提交
1967 1968
struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
				struct btrfs_root *root);
B
Balaji Rao 已提交
1969 1970
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
			 struct btrfs_root *root, int *is_new);
C
Chris Mason 已提交
1971 1972
int btrfs_commit_write(struct file *file, struct page *page,
		       unsigned from, unsigned to);
1973 1974 1975 1976 1977 1978
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
				    size_t page_offset, u64 start, u64 end,
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
1979 1980 1981
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
void btrfs_orphan_cleanup(struct btrfs_root *root);
Y
Yan Zheng 已提交
1982
int btrfs_cont_expand(struct inode *inode, loff_t size);
C
Christoph Hellwig 已提交
1983 1984 1985 1986

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);

C
Chris Mason 已提交
1987
/* file.c */
1988
int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1989 1990
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			    int skip_pinned);
1991
int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
C
Chris Mason 已提交
1992 1993 1994
extern struct file_operations btrfs_file_operations;
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode,
1995
		       u64 start, u64 end, u64 inline_limit, u64 *hint_block);
Y
Yan Zheng 已提交
1996 1997 1998
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
1999 2000
int btrfs_release_file(struct inode *inode, struct file *file);

2001 2002 2003
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, int cache_only);
2004 2005 2006 2007 2008 2009 2010 2011 2012

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);
int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
int btrfs_sysfs_add_root(struct btrfs_root *root);
void btrfs_sysfs_del_root(struct btrfs_root *root);
void btrfs_sysfs_del_super(struct btrfs_fs_info *root);

J
Josef Bacik 已提交
2013 2014
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
2015

2016 2017
/* super.c */
u64 btrfs_parse_size(char *str);
2018
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
2019
int btrfs_sync_fs(struct super_block *sb, int wait);
J
Josef Bacik 已提交
2020 2021 2022 2023 2024

/* acl.c */
int btrfs_check_acl(struct inode *inode, int mask);
int btrfs_init_acl(struct inode *inode, struct inode *dir);
int btrfs_acl_chmod(struct inode *inode);
J
Josef Bacik 已提交
2025 2026 2027 2028

/* free-space-cache.c */
int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
			 u64 bytenr, u64 size);
2029 2030
int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
			      u64 offset, u64 bytes);
J
Josef Bacik 已提交
2031 2032
int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
			    u64 bytenr, u64 size);
2033 2034
int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
				 u64 offset, u64 bytes);
J
Josef Bacik 已提交
2035 2036 2037 2038 2039 2040 2041 2042
void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
				   *block_group);
struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
					       *block_group, u64 offset,
					       u64 bytes);
void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
			   u64 bytes);
u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);
2043
#endif