ctree.h 92.1 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/mm.h>
#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/rwsem.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/kobject.h>
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#include <trace/events/btrfs.h>
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#include <asm/kmap_types.h>
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#include <linux/pagemap.h>
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#include "extent_io.h"
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#include "extent_map.h"
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#include "async-thread.h"
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#include "ioctl.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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struct btrfs_pending_snapshot;
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extern struct kmem_cache *btrfs_trans_handle_cachep;
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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extern struct kmem_cache *btrfs_free_space_cachep;
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struct btrfs_ordered_sum;
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#define BTRFS_MAGIC "_BHRfS_M"
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#define BTRFS_MAX_LEVEL 8
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#define BTRFS_COMPAT_EXTENT_TREE_V0

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/*
 * files bigger than this get some pre-flushing when they are added
 * to the ordered operations list.  That way we limit the total
 * work done by the commit
 */
#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)

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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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/* holds checksums of all the data extents */
#define BTRFS_CSUM_TREE_OBJECTID 7ULL

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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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/*
 * extent checksums all have this objectid
 * this allows them to share the logging tree
 * for fsyncs
 */
#define BTRFS_EXTENT_CSUM_OBJECTID -10ULL

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/* For storing free space cache */
#define BTRFS_FREE_SPACE_OBJECTID -11ULL

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/*
 * The inode number assigned to the special inode for sotring
 * free ino cache
 */
#define BTRFS_FREE_INO_OBJECTID -12ULL

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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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#define BTRFS_BTREE_INODE_OBJECTID 1

#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2

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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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/* csum types */
#define BTRFS_CSUM_TYPE_CRC32	0

static int btrfs_csum_sizes[] = { 4, 0 };

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/* four bytes for CRC32 */
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#define BTRFS_EMPTY_DIR_SIZE 0
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#define BTRFS_FT_UNKNOWN	0
#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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/*
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 * The key defines the order in the tree, and so it also defines (optimal)
 * block layout.
 *
 * objectid corresponds to the inode number.
 *
 * type tells us things about the object, and is a kind of stream selector.
 * so for a given inode, keys with type of 1 might refer to the inode data,
 * type of 2 may point to file data in the btree and type == 3 may point to
 * extents.
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 *
 * 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;
};

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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	/*
	 * starting byte of this partition on the device,
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	 * to allow for stripe alignment in the future
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	 */
	__le64 start_offset;

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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__));

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#define BTRFS_FREE_SPACE_EXTENT	1
#define BTRFS_FREE_SPACE_BITMAP	2

struct btrfs_free_space_entry {
	__le64 offset;
	__le64 bytes;
	u8 type;
} __attribute__ ((__packed__));

struct btrfs_free_space_header {
	struct btrfs_disk_key location;
	__le64 generation;
	__le64 num_entries;
	__le64 num_bitmaps;
} __attribute__ ((__packed__));

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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_HEADER_FLAG_WRITTEN	(1ULL << 0)
#define BTRFS_HEADER_FLAG_RELOC		(1ULL << 1)
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/*
 * File system states
 */

/* Errors detected */
#define BTRFS_SUPER_FLAG_ERROR		(1ULL << 2)

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#define BTRFS_SUPER_FLAG_SEEDING	(1ULL << 32)
#define BTRFS_SUPER_FLAG_METADUMP	(1ULL << 33)

#define BTRFS_BACKREF_REV_MAX		256
#define BTRFS_BACKREF_REV_SHIFT		56
#define BTRFS_BACKREF_REV_MASK		(((u64)BTRFS_BACKREF_REV_MAX - 1) << \
					 BTRFS_BACKREF_REV_SHIFT)

#define BTRFS_OLD_BACKREF_REV		0
#define BTRFS_MIXED_BACKREF_REV		1
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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)) / \
				     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_MAX_XATTR_SIZE(r)	(BTRFS_LEAF_DATA_SIZE(r) - \
				 sizeof(struct btrfs_item) -\
				 sizeof(struct btrfs_dir_item))
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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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/*
 * just in case we somehow lose the roots and are not able to mount,
 * we store an array of the roots from previous transactions
 * in the super.
 */
#define BTRFS_NUM_BACKUP_ROOTS 4
struct btrfs_root_backup {
	__le64 tree_root;
	__le64 tree_root_gen;

	__le64 chunk_root;
	__le64 chunk_root_gen;

	__le64 extent_root;
	__le64 extent_root_gen;

	__le64 fs_root;
	__le64 fs_root_gen;

	__le64 dev_root;
	__le64 dev_root_gen;

	__le64 csum_root;
	__le64 csum_root_gen;

	__le64 total_bytes;
	__le64 bytes_used;
	__le64 num_devices;
	/* future */
	__le64 unsed_64[4];

	u8 tree_root_level;
	u8 chunk_root_level;
	u8 extent_root_level;
	u8 fs_root_level;
	u8 dev_root_level;
	u8 csum_root_level;
	/* future and to align */
	u8 unused_8[10];
} __attribute__ ((__packed__));

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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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	/* this will help find the new super based on the log root */
	__le64 log_root_transid;
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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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	__le64 compat_flags;
	__le64 compat_ro_flags;
	__le64 incompat_flags;
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	__le16 csum_type;
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	u8 root_level;
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	u8 chunk_root_level;
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	u8 log_root_level;
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	struct btrfs_dev_item dev_item;
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	char label[BTRFS_LABEL_SIZE];
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	__le64 cache_generation;

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	/* future expansion */
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	__le64 reserved[31];
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	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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	struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
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} __attribute__ ((__packed__));

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/*
 * Compat flags that we support.  If any incompat flags are set other than the
 * ones specified below then we will fail to mount
 */
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#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)
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#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)
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#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)
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#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
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#define BTRFS_FEATURE_COMPAT_SUPP		0ULL
#define BTRFS_FEATURE_COMPAT_RO_SUPP		0ULL
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#define BTRFS_FEATURE_INCOMPAT_SUPP			\
	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\
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	 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |	\
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	 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS |		\
	 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO)
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/*
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 * A leaf is full of items. offset and size tell us where to find
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 * the item in the leaf (relative to the start of the data area)
 */
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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 */
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	int lowest_level;
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	/*
	 * set by btrfs_split_item, tells search_slot to keep all locks
	 * and to force calls to keep space in the nodes
	 */
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	unsigned int search_for_split:1;
	unsigned int keep_locks:1;
	unsigned int skip_locking:1;
	unsigned int leave_spinning:1;
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	unsigned int search_commit_root:1;
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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
 */
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struct btrfs_extent_item {
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	__le64 refs;
	__le64 generation;
	__le64 flags;
} __attribute__ ((__packed__));

struct btrfs_extent_item_v0 {
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	__le32 refs;
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} __attribute__ ((__packed__));

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#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
					sizeof(struct btrfs_item))

#define BTRFS_EXTENT_FLAG_DATA		(1ULL << 0)
#define BTRFS_EXTENT_FLAG_TREE_BLOCK	(1ULL << 1)

/* following flags only apply to tree blocks */

/* use full backrefs for extent pointers in the block */
#define BTRFS_BLOCK_FLAG_FULL_BACKREF	(1ULL << 8)

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/*
 * this flag is only used internally by scrub and may be changed at any time
 * it is only declared here to avoid collisions
 */
#define BTRFS_EXTENT_FLAG_SUPER		(1ULL << 48)

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struct btrfs_tree_block_info {
	struct btrfs_disk_key key;
	u8 level;
} __attribute__ ((__packed__));

struct btrfs_extent_data_ref {
	__le64 root;
	__le64 objectid;
	__le64 offset;
	__le32 count;
} __attribute__ ((__packed__));

struct btrfs_shared_data_ref {
	__le32 count;
} __attribute__ ((__packed__));

struct btrfs_extent_inline_ref {
	u8 type;
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	__le64 offset;
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} __attribute__ ((__packed__));

/* old style backrefs item */
struct btrfs_extent_ref_v0 {
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	__le64 root;
	__le64 generation;
	__le64 objectid;
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	__le32 count;
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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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enum btrfs_compression_type {
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	BTRFS_COMPRESS_NONE  = 0,
	BTRFS_COMPRESS_ZLIB  = 1,
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	BTRFS_COMPRESS_LZO   = 2,
	BTRFS_COMPRESS_TYPES = 2,
	BTRFS_COMPRESS_LAST  = 3,
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};
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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;
634
	__le64 nbytes;
635
	__le64 block_group;
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	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
640
	__le64 rdev;
641
	__le64 flags;
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643 644 645 646 647 648 649 650
	/* modification sequence number for NFS */
	__le64 sequence;

	/*
	 * a little future expansion, for more than this we can
	 * just grow the inode item and version it
	 */
	__le64 reserved[4];
651 652 653 654
	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
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} __attribute__ ((__packed__));

657 658 659 660
struct btrfs_dir_log_item {
	__le64 end;
} __attribute__ ((__packed__));

661
struct btrfs_dir_item {
662
	struct btrfs_disk_key location;
663
	__le64 transid;
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	__le16 data_len;
665
	__le16 name_len;
666 667 668
	u8 type;
} __attribute__ ((__packed__));

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#define BTRFS_ROOT_SUBVOL_RDONLY	(1ULL << 0)

671
struct btrfs_root_item {
672
	struct btrfs_inode_item inode;
673
	__le64 generation;
674
	__le64 root_dirid;
675 676 677
	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
679
	__le64 flags;
680
	__le32 refs;
681 682
	struct btrfs_disk_key drop_progress;
	u8 drop_level;
683
	u8 level;
684
} __attribute__ ((__packed__));
685

686 687 688 689 690 691 692 693 694
/*
 * 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
698

699
struct btrfs_file_extent_item {
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	/*
	 * transaction id that created this extent
	 */
703
	__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? */
725
	u8 type;
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727 728 729 730
	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
	 */
731 732
	__le64 disk_bytenr;
	__le64 disk_num_bytes;
733
	/*
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	 * the logical offset in file blocks (no csums)
735 736 737 738 739 740 741
	 * 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.
744
	 */
745
	__le64 num_bytes;
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747 748
} __attribute__ ((__packed__));

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struct btrfs_csum_item {
750
	u8 csum;
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} __attribute__ ((__packed__));

753
/* different types of block groups (and chunks) */
754 755 756 757 758 759 760
#define BTRFS_BLOCK_GROUP_DATA		(1ULL << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM	(1ULL << 1)
#define BTRFS_BLOCK_GROUP_METADATA	(1ULL << 2)
#define BTRFS_BLOCK_GROUP_RAID0		(1ULL << 3)
#define BTRFS_BLOCK_GROUP_RAID1		(1ULL << 4)
#define BTRFS_BLOCK_GROUP_DUP		(1ULL << 5)
#define BTRFS_BLOCK_GROUP_RAID10	(1ULL << 6)
761
#define BTRFS_BLOCK_GROUP_RESERVED	BTRFS_AVAIL_ALLOC_BIT_SINGLE
762 763 764 765 766 767 768 769 770 771
#define BTRFS_NR_RAID_TYPES		5

#define BTRFS_BLOCK_GROUP_TYPE_MASK	(BTRFS_BLOCK_GROUP_DATA |    \
					 BTRFS_BLOCK_GROUP_SYSTEM |  \
					 BTRFS_BLOCK_GROUP_METADATA)

#define BTRFS_BLOCK_GROUP_PROFILE_MASK	(BTRFS_BLOCK_GROUP_RAID0 |   \
					 BTRFS_BLOCK_GROUP_RAID1 |   \
					 BTRFS_BLOCK_GROUP_DUP |     \
					 BTRFS_BLOCK_GROUP_RAID10)
772 773 774 775 776 777 778 779 780
/*
 * We need a bit for restriper to be able to tell when chunks of type
 * SINGLE are available.  This "extended" profile format is used in
 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
 * (on-disk).  The corresponding on-disk bit in chunk.type is reserved
 * to avoid remappings between two formats in future.
 */
#define BTRFS_AVAIL_ALLOC_BIT_SINGLE	(1ULL << 48)

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struct btrfs_block_group_item {
	__le64 used;
783 784
	__le64 chunk_objectid;
	__le64 flags;
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} __attribute__ ((__packed__));

787 788
struct btrfs_space_info {
	u64 flags;
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	u64 total_bytes;	/* total bytes in the space,
				   this doesn't take mirrors into account */
792
	u64 bytes_used;		/* total bytes used,
793
				   this doesn't take mirrors into account */
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	u64 bytes_pinned;	/* total bytes pinned, will be freed when the
				   transaction finishes */
	u64 bytes_reserved;	/* total bytes the allocator has reserved for
				   current allocations */
	u64 bytes_readonly;	/* total bytes that are read only */
799

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	u64 bytes_may_use;	/* number of bytes that may be used for
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				   delalloc/allocations */
802
	u64 disk_used;		/* total bytes used on disk */
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	u64 disk_total;		/* total bytes on disk, takes mirrors into
				   account */
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806 807 808 809 810 811 812 813 814
	/*
	 * we bump reservation progress every time we decrement
	 * bytes_reserved.  This way people waiting for reservations
	 * know something good has happened and they can check
	 * for progress.  The number here isn't to be trusted, it
	 * just shows reclaim activity
	 */
	unsigned long reservation_progress;

815
	unsigned int full:1;	/* indicates that we cannot allocate any more
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				   chunks for this space */
817
	unsigned int chunk_alloc:1;	/* set if we are allocating a chunk */
818

819 820
	unsigned int flush:1;		/* set if we are trying to make space */

821 822
	unsigned int force_alloc;	/* set if we need to force a chunk
					   alloc for this space */
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824
	struct list_head list;
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	/* for block groups in our same type */
827
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
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828
	spinlock_t lock;
829
	struct rw_semaphore groups_sem;
830
	wait_queue_head_t wait;
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831 832
};

833 834 835 836 837 838 839 840
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	struct btrfs_space_info *space_info;
	spinlock_t lock;
	unsigned int full:1;
};

841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863
/*
 * free clusters are used to claim free space in relatively large chunks,
 * allowing us to do less seeky writes.  They are used for all metadata
 * allocations and data allocations in ssd mode.
 */
struct btrfs_free_cluster {
	spinlock_t lock;
	spinlock_t refill_lock;
	struct rb_root root;

	/* largest extent in this cluster */
	u64 max_size;

	/* first extent starting offset */
	u64 window_start;

	struct btrfs_block_group_cache *block_group;
	/*
	 * when a cluster is allocated from a block group, we put the
	 * cluster onto a list in the block group so that it can
	 * be freed before the block group is freed.
	 */
	struct list_head block_group_list;
864 865
};

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enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
869 870
	BTRFS_CACHE_FAST	= 2,
	BTRFS_CACHE_FINISHED	= 3,
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};

873 874 875 876 877 878 879 880
enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN	= 0,
	BTRFS_DC_ERROR		= 1,
	BTRFS_DC_CLEAR		= 2,
	BTRFS_DC_SETUP		= 3,
	BTRFS_DC_NEED_WRITE	= 4,
};

881 882 883 884
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
885
	struct btrfs_work work;
886 887 888 889 890
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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	struct btrfs_fs_info *fs_info;
895
	struct inode *inode;
896
	spinlock_t lock;
897
	u64 pinned;
898
	u64 reserved;
899
	u64 bytes_super;
900
	u64 flags;
901
	u64 sectorsize;
902
	u64 cache_generation;
903 904 905
	unsigned int ro:1;
	unsigned int dirty:1;
	unsigned int iref:1;
906 907

	int disk_cache_state;
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	/* cache tracking stuff */
	int cached;
911 912
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
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914 915 916
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
917
	struct btrfs_free_space_ctl *free_space_ctl;
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	/* block group cache stuff */
	struct rb_node cache_node;

	/* for block groups in the same raid type */
	struct list_head list;
924 925 926

	/* usage count */
	atomic_t count;
927 928 929 930 931

	/* List of struct btrfs_free_clusters for this block group.
	 * Today it will only have one thing on it, but that may change
	 */
	struct list_head cluster_list;
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};
933

934
struct reloc_control;
935
struct btrfs_device;
936
struct btrfs_fs_devices;
937
struct btrfs_balance_control;
938
struct btrfs_delayed_root;
939
struct btrfs_fs_info {
940
	u8 fsid[BTRFS_FSID_SIZE];
941
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
942 943
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
944 945
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
946
	struct btrfs_root *fs_root;
947
	struct btrfs_root *csum_root;
948 949 950

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
951 952

	spinlock_t fs_roots_radix_lock;
953
	struct radix_tree_root fs_roots_radix;
954

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	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
	struct rb_root block_group_cache_tree;

959 960 961 962
	/* keep track of unallocated space */
	spinlock_t free_chunk_lock;
	u64 free_chunk_space;

963 964
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
965

966 967 968
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

969 970 971 972
	/*
	 * block reservation for extent, checksum, root tree and
	 * delayed dir index item
	 */
973 974 975 976 977 978 979
	struct btrfs_block_rsv global_block_rsv;
	/* block reservation for delay allocation */
	struct btrfs_block_rsv delalloc_block_rsv;
	/* block reservation for metadata operations */
	struct btrfs_block_rsv trans_block_rsv;
	/* block reservation for chunk tree */
	struct btrfs_block_rsv chunk_block_rsv;
980 981
	/* block reservation for delayed operations */
	struct btrfs_block_rsv delayed_block_rsv;
982 983 984

	struct btrfs_block_rsv empty_block_rsv;

985
	u64 generation;
986
	u64 last_trans_committed;
987 988 989 990 991 992

	/*
	 * this is updated to the current trans every time a full commit
	 * is required instead of the faster short fsync log commits
	 */
	u64 last_trans_log_full_commit;
993 994
	unsigned long mount_opt:20;
	unsigned long compress_type:4;
995
	u64 max_inline;
996
	u64 alloc_start;
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	struct btrfs_transaction *running_transaction;
998
	wait_queue_head_t transaction_throttle;
999
	wait_queue_head_t transaction_wait;
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	wait_queue_head_t transaction_blocked_wait;
1001
	wait_queue_head_t async_submit_wait;
1002

1003 1004
	struct btrfs_super_block *super_copy;
	struct btrfs_super_block *super_for_commit;
1005
	struct block_device *__bdev;
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1006
	struct super_block *sb;
1007
	struct inode *btree_inode;
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1008
	struct backing_dev_info bdi;
1009
	struct mutex tree_log_mutex;
1010 1011
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
1012
	struct mutex chunk_mutex;
1013
	struct mutex volume_mutex;
1014 1015 1016 1017 1018 1019 1020 1021
	/*
	 * this protects the ordered operations list only while we are
	 * processing all of the entries on it.  This way we make
	 * sure the commit code doesn't find the list temporarily empty
	 * because another function happens to be doing non-waiting preflush
	 * before jumping into the main commit.
	 */
	struct mutex ordered_operations_mutex;
1022
	struct rw_semaphore extent_commit_sem;
1023

1024
	struct rw_semaphore cleanup_work_sem;
1025

1026
	struct rw_semaphore subvol_sem;
1027 1028
	struct srcu_struct subvol_srcu;

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1029
	spinlock_t trans_lock;
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1030 1031 1032 1033 1034 1035
	/*
	 * the reloc mutex goes with the trans lock, it is taken
	 * during commit to protect us from the relocation code
	 */
	struct mutex reloc_mutex;

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1036
	struct list_head trans_list;
1037
	struct list_head hashers;
1038
	struct list_head dead_roots;
1039
	struct list_head caching_block_groups;
1040

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1041 1042 1043
	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;

1044
	atomic_t nr_async_submits;
1045
	atomic_t async_submit_draining;
1046
	atomic_t nr_async_bios;
1047
	atomic_t async_delalloc_pages;
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1048
	atomic_t open_ioctl_trans;
1049

1050 1051 1052 1053 1054
	/*
	 * this is used by the balancing code to wait for all the pending
	 * ordered extents
	 */
	spinlock_t ordered_extent_lock;
1055 1056 1057 1058 1059 1060

	/*
	 * all of the data=ordered extents pending writeback
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
1061
	struct list_head ordered_extents;
1062 1063 1064 1065 1066 1067

	/*
	 * all of the inodes that have delalloc bytes.  It is possible for
	 * this list to be empty even when there is still dirty data=ordered
	 * extents waiting to finish IO.
	 */
1068
	struct list_head delalloc_inodes;
1069

1070 1071 1072 1073 1074 1075 1076
	/*
	 * special rename and truncate targets that must be on disk before
	 * we're allowed to commit.  This is basically the ext3 style
	 * data=ordered list.
	 */
	struct list_head ordered_operations;

1077 1078 1079 1080 1081 1082
	/*
	 * 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.
1083 1084 1085
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1086
	 */
1087
	struct btrfs_workers generic_worker;
1088
	struct btrfs_workers workers;
1089
	struct btrfs_workers delalloc_workers;
1090
	struct btrfs_workers endio_workers;
1091
	struct btrfs_workers endio_meta_workers;
1092
	struct btrfs_workers endio_meta_write_workers;
1093
	struct btrfs_workers endio_write_workers;
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	struct btrfs_workers endio_freespace_worker;
1095
	struct btrfs_workers submit_workers;
1096
	struct btrfs_workers caching_workers;
1097
	struct btrfs_workers readahead_workers;
1098

1099 1100 1101 1102 1103 1104
	/*
	 * 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;
1105
	struct btrfs_workers delayed_workers;
1106 1107
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1108
	int thread_pool_size;
1109

1110 1111
	struct kobject super_kobj;
	struct completion kobj_unregister;
1112
	int do_barriers;
1113
	int closing;
1114
	int log_root_recovering;
1115
	int enospc_unlink;
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1116
	int trans_no_join;
1117

1118
	u64 total_pinned;
1119 1120 1121 1122 1123

	/* protected by the delalloc lock, used to keep from writing
	 * metadata until there is a nice batch
	 */
	u64 dirty_metadata_bytes;
1124 1125
	struct list_head dirty_cowonly_roots;

1126
	struct btrfs_fs_devices *fs_devices;
1127 1128 1129 1130 1131 1132

	/*
	 * the space_info list is almost entirely read only.  It only changes
	 * when we add a new raid type to the FS, and that happens
	 * very rarely.  RCU is used to protect it.
	 */
1133
	struct list_head space_info;
1134

1135 1136
	struct reloc_control *reloc_ctl;

1137 1138
	spinlock_t delalloc_lock;
	u64 delalloc_bytes;
1139 1140 1141 1142 1143 1144

	/* data_alloc_cluster is only used in ssd mode */
	struct btrfs_free_cluster data_alloc_cluster;

	/* all metadata allocations go through this cluster */
	struct btrfs_free_cluster meta_alloc_cluster;
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1146 1147 1148 1149 1150
	/* auto defrag inodes go here */
	spinlock_t defrag_inodes_lock;
	struct rb_root defrag_inodes;
	atomic_t defrag_running;

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1151 1152 1153
	spinlock_t ref_cache_lock;
	u64 total_ref_cache_size;

1154 1155 1156 1157 1158
	/*
	 * these three are in extended format (availability of single
	 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
	 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
	 */
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	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
1162

1163 1164 1165 1166 1167
	/* restriper state */
	spinlock_t balance_lock;
	struct mutex balance_mutex;
	struct btrfs_balance_control *balance_ctl;

1168 1169 1170
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1171
	void *bdev_holder;
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1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
	/* private scrub information */
	struct mutex scrub_lock;
	atomic_t scrubs_running;
	atomic_t scrub_pause_req;
	atomic_t scrubs_paused;
	atomic_t scrub_cancel_req;
	wait_queue_head_t scrub_pause_wait;
	struct rw_semaphore scrub_super_lock;
	int scrub_workers_refcnt;
	struct btrfs_workers scrub_workers;

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	/* filesystem state */
	u64 fs_state;
1186 1187

	struct btrfs_delayed_root *delayed_root;
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1189 1190 1191
	/* readahead tree */
	spinlock_t reada_lock;
	struct radix_tree_root reada_tree;
1192

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1193 1194
	/* next backup root to be overwritten */
	int backup_root_index;
1195
};
1196

1197 1198
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1199
 * and for the extent tree extent_root root.
1200 1201
 */
struct btrfs_root {
1202
	struct extent_buffer *node;
1203

1204
	struct extent_buffer *commit_root;
1205
	struct btrfs_root *log_root;
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	struct btrfs_root *reloc_root;
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1208 1209
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1210
	struct btrfs_fs_info *fs_info;
1211 1212
	struct extent_io_tree dirty_log_pages;

1213 1214
	struct kobject root_kobj;
	struct completion kobj_unregister;
1215
	struct mutex objectid_mutex;
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1217 1218 1219
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1220 1221 1222 1223 1224 1225 1226 1227
	/* free ino cache stuff */
	struct mutex fs_commit_mutex;
	struct btrfs_free_space_ctl *free_ino_ctl;
	enum btrfs_caching_type cached;
	spinlock_t cache_lock;
	wait_queue_head_t cache_wait;
	struct btrfs_free_space_ctl *free_ino_pinned;
	u64 cache_progress;
1228
	struct inode *cache_inode;
1229

1230
	struct mutex log_mutex;
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	wait_queue_head_t log_writer_wait;
	wait_queue_head_t log_commit_wait[2];
	atomic_t log_writers;
	atomic_t log_commit[2];
	unsigned long log_transid;
1236
	unsigned long last_log_commit;
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	unsigned long log_batch;
1238 1239
	pid_t log_start_pid;
	bool log_multiple_pids;
1240

1241 1242
	u64 objectid;
	u64 last_trans;
1243 1244 1245 1246 1247 1248 1249 1250 1251 1252

	/* 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;

1253 1254
	u32 stripesize;

1255
	u32 type;
1256 1257

	u64 highest_objectid;
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	/* btrfs_record_root_in_trans is a multi-step process,
	 * and it can race with the balancing code.   But the
	 * race is very small, and only the first time the root
	 * is added to each transaction.  So in_trans_setup
	 * is used to tell us when more checks are required
	 */
	unsigned long in_trans_setup;
1266
	int ref_cows;
1267
	int track_dirty;
1268 1269
	int in_radix;

1270
	u64 defrag_trans_start;
1271
	struct btrfs_key defrag_progress;
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	struct btrfs_key defrag_max;
1273
	int defrag_running;
1274
	char *name;
1275 1276 1277

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1278

1279 1280
	struct list_head root_list;

1281
	spinlock_t orphan_lock;
1282
	struct list_head orphan_list;
1283 1284 1285
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_item_inserted;
	int orphan_cleanup_state;
1286

1287 1288 1289 1290
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1291 1292 1293 1294 1295
	/*
	 * radix tree that keeps track of delayed nodes of every inode,
	 * protected by inode_lock
	 */
	struct radix_tree_root delayed_nodes_tree;
1296 1297 1298 1299
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
1300
	dev_t anon_dev;
1301 1302

	int force_cow;
1303 1304
};

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struct btrfs_ioctl_defrag_range_args {
	/* start of the defrag operation */
	__u64 start;

	/* number of bytes to defrag, use (u64)-1 to say all */
	__u64 len;

	/*
	 * flags for the operation, which can include turning
	 * on compression for this one defrag
	 */
	__u64 flags;

	/*
	 * any extent bigger than this will be considered
	 * already defragged.  Use 0 to take the kernel default
	 * Use 1 to say every single extent must be rewritten
	 */
	__u32 extent_thresh;

	/*
	 * which compression method to use if turning on compression
	 * for this defrag operation.  If unspecified, zlib will
	 * be used
	 */
	__u32 compress_type;

	/* spare for later */
	__u32 unused[4];
};


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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
1343 1344 1345
#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.
 */
1352 1353 1354 1355
#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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 */
1359
#define BTRFS_EXTENT_DATA_KEY	108
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/*
1362 1363
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
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 */
1365
#define BTRFS_EXTENT_CSUM_KEY	128
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/*
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 * root items point to tree roots.  They are typically in the root
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 * tree used by the super block to find all the other trees
 */
1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
#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
 */
1390
#define BTRFS_EXTENT_ITEM_KEY	168
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400

#define BTRFS_TREE_BLOCK_REF_KEY	176

#define BTRFS_EXTENT_DATA_REF_KEY	178

#define BTRFS_EXTENT_REF_V0_KEY		180

#define BTRFS_SHARED_BLOCK_REF_KEY	182

#define BTRFS_SHARED_DATA_REF_KEY	184
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/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
1406
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1407

1408 1409 1410
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
1411

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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

1418 1419 1420 1421 1422
/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */
1423 1424 1425
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
1426
#define BTRFS_MOUNT_SSD			(1 << 3)
1427
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
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#define BTRFS_MOUNT_COMPRESS		(1 << 5)
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#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
1430
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
1431
#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
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#define BTRFS_MOUNT_NOSSD		(1 << 9)
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#define BTRFS_MOUNT_DISCARD		(1 << 10)
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#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
1435
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
1436
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
1437
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1438
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
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#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
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#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
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#define BTRFS_MOUNT_RECOVERY		(1 << 18)
1442 1443 1444 1445 1446

#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)
1455 1456 1457 1458 1459 1460
#define BTRFS_INODE_SYNC		(1 << 5)
#define BTRFS_INODE_IMMUTABLE		(1 << 6)
#define BTRFS_INODE_APPEND		(1 << 7)
#define BTRFS_INODE_NODUMP		(1 << 8)
#define BTRFS_INODE_NOATIME		(1 << 9)
#define BTRFS_INODE_DIRSYNC		(1 << 10)
1461
#define BTRFS_INODE_COMPRESS		(1 << 11)
1462

1463 1464
#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484
/* 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)))

1485
#ifndef BTRFS_SETGET_FUNCS
1486
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
1487 1488 1489
u##bits btrfs_##name(struct extent_buffer *eb, type *s);		\
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
#endif
1490 1491 1492 1493

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
1494
	type *p = page_address(eb->first_page);				\
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	u##bits res = le##bits##_to_cpu(p->member);			\
1496
	return res;							\
1497 1498 1499 1500
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
1501
	type *p = page_address(eb->first_page);				\
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	p->member = cpu_to_le##bits(val);				\
1503
}
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1505 1506 1507 1508 1509 1510 1511 1512
#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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}

1515 1516 1517 1518 1519
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);
1520 1521
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
1522 1523
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1524 1525 1526
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);
1528

1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540
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);
1541 1542 1543 1544 1545 1546
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);
1549

1550 1551 1552 1553 1554
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);
}

1560
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1561 1562 1563 1564 1565 1566 1567
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);
1569 1570 1571
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

1572 1573 1574 1575 1576 1577
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);
1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589
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);
1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603
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;
}

1604 1605 1606 1607 1608
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
}

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

1621 1622 1623 1624 1625
/* 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);
1626 1627
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
1628 1629

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1630 1631 1632 1633 1634
		   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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1636 1637
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1638
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1639

1640 1641
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1642
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1643
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1644
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1645
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1646 1647 1648 1649 1650
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);
1651
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1652
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
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1654
static inline struct btrfs_timespec *
1655
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
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{
1657 1658
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, atime);
1659
	return (struct btrfs_timespec *)ptr;
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}

1662
static inline struct btrfs_timespec *
1663
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
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{
1665 1666
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, mtime);
1667
	return (struct btrfs_timespec *)ptr;
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}

1670
static inline struct btrfs_timespec *
1671
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
C
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1672
{
1673 1674
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, ctime);
1675
	return (struct btrfs_timespec *)ptr;
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}

1678 1679
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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1681
/* struct btrfs_dev_extent */
1682 1683 1684 1685 1686 1687
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);
1688 1689
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

1690 1691 1692 1693 1694 1695
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);
}

1696 1697 1698 1699
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1700

1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718
BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);


BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);

static inline void btrfs_tree_block_key(struct extent_buffer *eb,
					struct btrfs_tree_block_info *item,
					struct btrfs_disk_key *key)
{
	read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}

static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
					    struct btrfs_tree_block_info *item,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
C
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1719

1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756
BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
		   root, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
		   objectid, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
		   offset, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
		   count, 32);

BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
		   count, 32);

BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
		   type, 8);
BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
		   offset, 64);

static inline u32 btrfs_extent_inline_ref_size(int type)
{
	if (type == BTRFS_TREE_BLOCK_REF_KEY ||
	    type == BTRFS_SHARED_BLOCK_REF_KEY)
		return sizeof(struct btrfs_extent_inline_ref);
	if (type == BTRFS_SHARED_DATA_REF_KEY)
		return sizeof(struct btrfs_shared_data_ref) +
		       sizeof(struct btrfs_extent_inline_ref);
	if (type == BTRFS_EXTENT_DATA_REF_KEY)
		return sizeof(struct btrfs_extent_data_ref) +
		       offsetof(struct btrfs_extent_inline_ref, offset);
	BUG();
	return 0;
}

BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
		   generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
C
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1758 1759
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1760
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
C
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1761

1762
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
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1763
{
1764 1765 1766 1767
	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);
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1768 1769
}

1770 1771
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
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1772
{
1773 1774 1775 1776
	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);
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1777 1778
}

1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795
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);
}

1796
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1797
{
1798 1799
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
1800 1801
}

1802 1803 1804
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

1805 1806
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
1807
{
1808 1809 1810 1811
	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);
1812 1813
}

1814 1815 1816
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1817

1818
static inline unsigned long btrfs_item_nr_offset(int nr)
1819
{
1820 1821
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
1822 1823
}

1824 1825
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
					       int nr)
C
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1826
{
1827
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
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1828 1829
}

1830 1831
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
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1832
{
1833
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
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1834 1835
}

1836
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1837
{
1838
	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
C
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1839 1840
}

1841
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1842
{
1843
	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
C
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1844 1845
}

1846
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1847
{
1848
	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
C
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1849 1850
}

1851 1852
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
1853
{
1854 1855
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1856 1857
}

1858 1859
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
1860
{
1861 1862
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1863 1864
}

1865 1866
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

1867 1868 1869 1870 1871 1872 1873
/*
 * 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);

1874
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
1875
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1876 1877
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1878
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1879

1880 1881 1882
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
1883
{
1884
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1885 1886
}

1887 1888 1889
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
1890
{
1891
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1892 1893
}

1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914
BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
		   num_entries, 64);
BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
		   num_bitmaps, 64);
BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
		   generation, 64);

static inline void btrfs_free_space_key(struct extent_buffer *eb,
					struct btrfs_free_space_header *h,
					struct btrfs_disk_key *key)
{
	read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
}

static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
					    struct btrfs_free_space_header *h,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
}

1915 1916 1917 1918 1919
/* 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);
1920

C
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1921 1922 1923 1924
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
1925
	cpu->type = disk->type;
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1926 1927 1928 1929 1930 1931 1932
	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);
1933
	disk->type = cpu->type;
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1934 1935 1936
	disk->objectid = cpu_to_le64(cpu->objectid);
}

1937 1938
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1939
{
1940 1941 1942
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1943 1944
}

1945 1946
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1947
{
1948 1949 1950
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1951 1952
}

1953 1954 1955
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
1956
{
1957 1958 1959
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
1960 1961
}

1962

1963
static inline u8 btrfs_key_type(struct btrfs_key *key)
1964
{
1965
	return key->type;
1966 1967
}

1968
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1969
{
1970
	key->type = val;
1971 1972
}

1973
/* struct btrfs_header */
1974
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1975 1976 1977 1978
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);
1979
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1980
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1981

1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
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;
}

2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
{
	u64 flags = btrfs_header_flags(eb);
	return flags >> BTRFS_BACKREF_REV_SHIFT;
}

static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
						int rev)
{
	u64 flags = btrfs_header_flags(eb);
	flags &= ~BTRFS_BACKREF_REV_MASK;
	flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
	btrfs_set_header_flags(eb, flags);
}

2016
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
2017
{
2018 2019
	unsigned long ptr = offsetof(struct btrfs_header, fsid);
	return (u8 *)ptr;
2020 2021
}

2022 2023 2024 2025 2026 2027
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;
}

2028
static inline int btrfs_is_leaf(struct extent_buffer *eb)
2029
{
C
Chris Mason 已提交
2030
	return btrfs_header_level(eb) == 0;
2031 2032
}

2033
/* struct btrfs_root_item */
2034 2035
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
2036
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2037 2038
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2039

2040 2041
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
2042 2043
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2044 2045
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);
2046
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2047 2048
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
2049 2050
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
C
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2051

L
Li Zefan 已提交
2052 2053 2054 2055 2056
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
	return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
}

C
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2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105
/* struct btrfs_root_backup */
BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
		   tree_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
		   tree_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
		   tree_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
		   chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
		   chunk_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
		   chunk_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
		   extent_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
		   extent_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
		   extent_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
		   fs_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
		   fs_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
		   fs_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
		   dev_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
		   dev_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
		   dev_root_level, 8);

BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
		   csum_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
		   csum_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
		   csum_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
		   total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
		   bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
		   num_devices, 64);

2106
/* struct btrfs_super_block */
2107

2108
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2109
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2110 2111 2112
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2113 2114
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
2115 2116
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
2117 2118
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
2119 2120 2121
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,
2122 2123 2124
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
2125 2126
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
2127 2128
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
2129 2130 2131 2132
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);
2133 2134 2135 2136 2137 2138
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);
2139 2140
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
2141 2142
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
2143 2144
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
2145 2146 2147
BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
			 compat_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2148
			 compat_ro_flags, 64);
2149 2150
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
2151 2152
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
2153 2154
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
2155 2156 2157 2158 2159 2160 2161

static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
	int t = btrfs_super_csum_type(s);
	BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
	return btrfs_csum_sizes[t];
}
2162

2163
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2164
{
2165
	return offsetof(struct btrfs_leaf, items);
2166 2167
}

2168 2169
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2170

C
Chris Mason 已提交
2171 2172
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2173
{
2174
	unsigned long offset = (unsigned long)e;
2175
	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2176
	return offset;
2177 2178 2179 2180
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
2181
	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2182 2183
}

2184 2185
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
2186 2187
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
2188 2189
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
2190 2191
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
2192 2193
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223
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;
}
2224

C
Chris Mason 已提交
2225 2226 2227 2228 2229
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

C
Chris Mason 已提交
2230 2231
static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
{
2232 2233 2234 2235 2236
	if (level == 0)
		return root->leafsize;
	return root->nodesize;
}

2237 2238
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
2239
	((type *)(btrfs_leaf_data(leaf) + \
2240 2241 2242 2243 2244
	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)))
2245

2246 2247
static inline struct dentry *fdentry(struct file *file)
{
2248 2249 2250
	return file->f_path.dentry;
}

2251 2252 2253 2254 2255 2256
static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info)
{
	return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) &&
		(space_info->flags & BTRFS_BLOCK_GROUP_DATA));
}

2257 2258 2259 2260 2261
static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
	return mapping_gfp_mask(mapping) & ~__GFP_FS;
}

C
Chris Mason 已提交
2262
/* extent-tree.c */
2263
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
2264
						 unsigned num_items)
2265 2266 2267
{
	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
		3 * num_items;
2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278
}

/*
 * Doing a truncate won't result in new nodes or leaves, just what we need for
 * COW.
 */
static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
						 unsigned num_items)
{
	return (root->leafsize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
		num_items;
2279 2280
}

2281
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2282 2283
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
Z
Zheng Yan 已提交
2284
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2285 2286 2287
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
			     u64 num_bytes, u64 *refs, u64 *flags);
2288 2289
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
2290 2291 2292
int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root,
				    u64 bytenr, u64 num_bytes);
Y
Yan Zheng 已提交
2293
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2294 2295
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
C
Chris Mason 已提交
2296 2297 2298
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
2299
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2300 2301
u64 btrfs_find_block_group(struct btrfs_root *root,
			   u64 search_start, u64 search_hint, int owner);
2302
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2303 2304 2305 2306
					struct btrfs_root *root, u32 blocksize,
					u64 parent, u64 root_objectid,
					struct btrfs_disk_key *key, int level,
					u64 hint, u64 empty_size);
2307 2308 2309 2310
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
			   u64 parent, int last_ref);
2311 2312
struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
					    struct btrfs_root *root,
2313 2314
					    u64 bytenr, u32 blocksize,
					    int level);
2315 2316 2317 2318 2319 2320 2321 2322
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
				     struct btrfs_root *root,
				     u64 root_objectid, u64 owner,
				     u64 offset, struct btrfs_key *ins);
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   u64 root_objectid, u64 owner, u64 offset,
				   struct btrfs_key *ins);
2323 2324 2325 2326 2327 2328
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);
2329
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2330 2331 2332 2333 2334 2335 2336
		  struct extent_buffer *buf, int full_backref);
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		  struct extent_buffer *buf, int full_backref);
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
				u64 bytenr, u64 num_bytes, u64 flags,
				int is_data);
Z
Zheng Yan 已提交
2337 2338 2339
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
		      u64 bytenr, u64 num_bytes, u64 parent,
2340 2341
		      u64 root_objectid, u64 owner, u64 offset);

2342
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2343 2344
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
				       u64 start, u64 len);
2345 2346
int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
C
Chris Mason 已提交
2347
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2348
			       struct btrfs_root *root);
C
Chris Mason 已提交
2349
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
2350 2351
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
2352 2353
			 u64 root_objectid, u64 owner, u64 offset);

C
Chris Mason 已提交
2354 2355
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
2356
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
2357 2358
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
2359
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2360 2361
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
2362
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
2363
			   u64 size);
Z
Zheng Yan 已提交
2364 2365
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 group_start);
Y
Yan Zheng 已提交
2366
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2367
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
J
Josef Bacik 已提交
2368
void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2369
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2370 2371
int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2372 2373
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
2374 2375 2376
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
2377 2378
int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_pending_snapshot *pending);
2379 2380 2381 2382
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
2383 2384 2385 2386
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
2387
int btrfs_block_rsv_add(struct btrfs_root *root,
2388
			struct btrfs_block_rsv *block_rsv,
2389
			u64 num_bytes);
2390 2391 2392
int btrfs_block_rsv_add_noflush(struct btrfs_root *root,
				struct btrfs_block_rsv *block_rsv,
				u64 num_bytes);
2393
int btrfs_block_rsv_check(struct btrfs_root *root,
2394 2395
			  struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
2396
			  struct btrfs_block_rsv *block_rsv,
2397
			  u64 min_reserved);
2398 2399 2400
int btrfs_block_rsv_refill_noflush(struct btrfs_root *root,
				   struct btrfs_block_rsv *block_rsv,
				   u64 min_reserved);
2401 2402 2403 2404 2405 2406 2407 2408 2409 2410
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
int btrfs_set_block_group_ro(struct btrfs_root *root,
			     struct btrfs_block_group_cache *cache);
int btrfs_set_block_group_rw(struct btrfs_root *root,
			     struct btrfs_block_group_cache *cache);
2411
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2412
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
2413 2414 2415
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
				   u64 start, u64 end);
int btrfs_error_discard_extent(struct btrfs_root *root, u64 bytenr,
2416
			       u64 num_bytes, u64 *actual_bytes);
2417 2418
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
2419
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
2420

2421
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
C
Chris Mason 已提交
2422
/* ctree.c */
2423 2424 2425
int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key,
		     int level, int *slot);
int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2426 2427 2428
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
Z
Zheng Yan 已提交
2429 2430 2431
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, struct btrfs_path *path,
			    struct btrfs_key *new_key);
2432 2433
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2434
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2435 2436 2437
			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,
2438
			 struct btrfs_key *max_key,
2439 2440
			 struct btrfs_path *path, int cache_only,
			 u64 min_trans);
2441 2442 2443
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
2444
		    struct extent_buffer **cow_ret);
2445 2446 2447 2448
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);
2449 2450
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
2451 2452
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
2453 2454 2455
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_path *path,
2456
			u32 new_size, int from_end);
2457 2458 2459 2460 2461
int btrfs_split_item(struct btrfs_trans_handle *trans,
		     struct btrfs_root *root,
		     struct btrfs_path *path,
		     struct btrfs_key *new_key,
		     unsigned long split_offset);
Y
Yan, Zheng 已提交
2462 2463 2464 2465
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
2466 2467 2468
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);
2469
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2470
		       struct btrfs_root *root, struct extent_buffer *parent,
2471 2472
		       int start_slot, int cache_only, u64 *last_ret,
		       struct btrfs_key *progress);
2473
void btrfs_release_path(struct btrfs_path *p);
C
Chris Mason 已提交
2474 2475
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
2476
void btrfs_set_path_blocking(struct btrfs_path *p);
2477
void btrfs_clear_path_blocking(struct btrfs_path *p,
2478
			       struct extent_buffer *held, int held_rw);
2479 2480
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

2481 2482 2483 2484 2485 2486 2487 2488 2489
int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_path *path, int slot, int nr);
static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root,
				 struct btrfs_path *path)
{
	return btrfs_del_items(trans, root, path, path->slots[0], 1);
}

2490 2491 2492 2493
int setup_items_for_insert(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, struct btrfs_path *path,
			   struct btrfs_key *cpu_key, u32 *data_size,
			   u32 total_data, u32 total_size, int nr);
2494 2495
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
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
2510
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2511
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2512
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2513 2514
void btrfs_drop_snapshot(struct btrfs_root *root,
			 struct btrfs_block_rsv *block_rsv, int update_ref);
Y
Yan Zheng 已提交
2515 2516 2517 2518
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
2519 2520 2521 2522 2523 2524 2525 2526
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
	 * Get synced with close_ctree()
	 */
	smp_mb();
	return fs_info->closing;
}
2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
	kfree(fs_info->delayed_root);
	kfree(fs_info->extent_root);
	kfree(fs_info->tree_root);
	kfree(fs_info->chunk_root);
	kfree(fs_info->dev_root);
	kfree(fs_info->csum_root);
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
	kfree(fs_info);
}
2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556
/**
 * profile_is_valid - tests whether a given profile is valid and reduced
 * @flags: profile to validate
 * @extended: if true @flags is treated as an extended profile
 */
static inline int profile_is_valid(u64 flags, int extended)
{
	u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK;

	flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
	if (extended)
		mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;

	if (flags & mask)
		return 0;
	/* true if zero or exactly one bit set */
	return (flags & (~flags + 1)) == flags;
}
2557

C
Chris Mason 已提交
2558
/* root-item.c */
2559
int btrfs_find_root_ref(struct btrfs_root *tree_root,
2560 2561
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
2562 2563
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
2564 2565 2566 2567 2568
		       u64 root_id, u64 ref_id, u64 dirid, u64 sequence,
		       const char *name, int name_len);
int btrfs_del_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
		       u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
2569
		       const char *name, int name_len);
2570 2571 2572 2573 2574 2575 2576 2577 2578 2579
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);
2580
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2581
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2582 2583
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
2584 2585
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);

C
Chris Mason 已提交
2586
/* dir-item.c */
C
Chris Mason 已提交
2587 2588
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
2589
			  int name_len, struct inode *dir,
2590
			  struct btrfs_key *location, u8 type, u64 index);
2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601
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);
2602 2603 2604 2605
struct btrfs_dir_item *
btrfs_search_dir_index_item(struct btrfs_root *root,
			    struct btrfs_path *path, u64 dirid,
			    const char *name, int name_len);
2606 2607
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
			      struct btrfs_path *path,
2608
			      const char *name, int name_len);
2609 2610 2611 2612
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
2613
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2614 2615 2616 2617
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 objectid,
			    const char *name, u16 name_len,
			    const void *data, u16 data_len);
J
Josef Bacik 已提交
2618 2619 2620 2621 2622
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);
2623 2624 2625
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
2626 2627 2628 2629 2630 2631

/* 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);
2632
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2633

C
Chris Mason 已提交
2634
/* inode-item.c */
2635 2636 2637
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
2638
			   u64 inode_objectid, u64 ref_objectid, u64 index);
2639 2640 2641
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
2642
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
2643 2644 2645 2646 2647 2648
struct btrfs_inode_ref *
btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_path *path,
			const char *name, int name_len,
			u64 inode_objectid, u64 ref_objectid, int mod);
2649 2650 2651
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
2652
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2653 2654
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
2655 2656

/* file-item.c */
2657 2658
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
2659
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2660
			  struct bio *bio, u32 *dst);
2661 2662
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
			      struct bio *bio, u64 logical_offset, u32 *dst);
C
Chris Mason 已提交
2663
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
2664 2665 2666 2667 2668
			     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
2669 2670 2671
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
2672
			     u64 bytenr, int mod);
2673
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2674
			   struct btrfs_root *root,
2675
			   struct btrfs_ordered_sum *sums);
2676
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2677
		       struct bio *bio, u64 file_start, int contig);
C
Chris Mason 已提交
2678 2679 2680
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
2681
					  u64 bytenr, int cow);
C
Chris Mason 已提交
2682 2683 2684
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct btrfs_path *path,
			u64 isize);
A
Arne Jansen 已提交
2685 2686
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
C
Chris Mason 已提交
2687
/* inode.c */
J
Josef Bacik 已提交
2688 2689 2690
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
2691 2692

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2693
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2694 2695 2696 2697 2698
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

L
Li Zefan 已提交
2699 2700 2701 2702 2703 2704 2705 2706
/* This forces readahead on a given range of bytes in an inode */
static inline void btrfs_force_ra(struct address_space *mapping,
				  struct file_ra_state *ra, struct file *file,
				  pgoff_t offset, unsigned long req_size)
{
	page_cache_sync_readahead(mapping, ra, file, offset, req_size);
}

2707 2708
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
2709 2710 2711 2712 2713 2714 2715
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);
2716 2717 2718 2719
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
2720 2721 2722 2723 2724
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct inode *inode, u64 new_size,
			       u32 min_type);

Y
Yan, Zheng 已提交
2725
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
2726 2727
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
2728 2729
int btrfs_writepages(struct address_space *mapping,
		     struct writeback_control *wbc);
2730
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2731
			     struct btrfs_root *new_root, u64 new_dirid);
2732
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
C
Chris Mason 已提交
2733
			 size_t size, struct bio *bio, unsigned long bio_flags);
2734

2735
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
2736
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
2737
void btrfs_evict_inode(struct inode *inode);
2738
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
2739 2740
int btrfs_dirty_inode(struct inode *inode);
int btrfs_update_time(struct file *file);
C
Chris Mason 已提交
2741 2742
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
2743
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
2744 2745
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
2746
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
2747
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2748
			 struct btrfs_root *root, int *was_new);
2749
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
2750
				    size_t pg_offset, u64 start, u64 end,
2751 2752 2753 2754
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
2755 2756
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2757
int btrfs_orphan_cleanup(struct btrfs_root *root);
2758 2759
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
2760
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2761
int btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
2762 2763
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
2764 2765 2766
int btrfs_prealloc_file_range(struct inode *inode, int mode,
			      u64 start, u64 num_bytes, u64 min_size,
			      loff_t actual_len, u64 *alloc_hint);
2767 2768 2769 2770
int btrfs_prealloc_file_range_trans(struct inode *inode,
				    struct btrfs_trans_handle *trans, int mode,
				    u64 start, u64 num_bytes, u64 min_size,
				    loff_t actual_len, u64 *alloc_hint);
2771
extern const struct dentry_operations btrfs_dentry_operations;
C
Christoph Hellwig 已提交
2772 2773 2774

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2775 2776
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
C
Chris Mason 已提交
2777 2778 2779
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
C
Chris Mason 已提交
2780
/* file.c */
C
Chris Mason 已提交
2781 2782 2783
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
2784
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
2785 2786
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			    int skip_pinned);
2787
extern const struct file_operations btrfs_file_operations;
Y
Yan, Zheng 已提交
2788 2789
int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode,
		       u64 start, u64 end, u64 *hint_byte, int drop_cache);
Y
Yan Zheng 已提交
2790 2791
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
2792
int btrfs_release_file(struct inode *inode, struct file *file);
2793 2794 2795 2796 2797
void btrfs_drop_pages(struct page **pages, size_t num_pages);
int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
		      struct page **pages, size_t num_pages,
		      loff_t pos, size_t write_bytes,
		      struct extent_state **cached);
S
Sage Weil 已提交
2798

2799 2800 2801
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, int cache_only);
2802 2803 2804 2805 2806

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);

J
Josef Bacik 已提交
2807 2808
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
2809

2810
/* super.c */
2811
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
2812
int btrfs_sync_fs(struct super_block *sb, int wait);
L
liubo 已提交
2813 2814 2815 2816 2817 2818 2819 2820
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
		     unsigned int line, int errno);

#define btrfs_std_error(fs_info, errno)				\
do {								\
	if ((errno))						\
		__btrfs_std_error((fs_info), __func__, __LINE__, (errno));\
} while (0)
J
Josef Bacik 已提交
2821 2822

/* acl.c */
C
Chris Mason 已提交
2823
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
2824
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
2825 2826
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
J
Josef Bacik 已提交
2827
int btrfs_acl_chmod(struct inode *inode);
2828
#else
2829
#define btrfs_get_acl NULL
2830 2831 2832 2833 2834 2835 2836 2837 2838 2839
static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
				 struct inode *inode, struct inode *dir)
{
	return 0;
}
static inline int btrfs_acl_chmod(struct inode *inode)
{
	return 0;
}
#endif
J
Josef Bacik 已提交
2840

2841 2842 2843 2844 2845 2846 2847 2848
/* relocation.c */
int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
int btrfs_init_reloc_root(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root);
int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root);
int btrfs_recover_relocation(struct btrfs_root *root);
int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
2849 2850 2851 2852 2853 2854 2855 2856
void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, struct extent_buffer *buf,
			   struct extent_buffer *cow);
void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans,
			      struct btrfs_pending_snapshot *pending,
			      u64 *bytes_to_reserve);
void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
			      struct btrfs_pending_snapshot *pending);
A
Arne Jansen 已提交
2857 2858 2859

/* scrub.c */
int btrfs_scrub_dev(struct btrfs_root *root, u64 devid, u64 start, u64 end,
A
Arne Jansen 已提交
2860
		    struct btrfs_scrub_progress *progress, int readonly);
A
Arne Jansen 已提交
2861 2862 2863 2864 2865 2866 2867 2868 2869 2870
int btrfs_scrub_pause(struct btrfs_root *root);
int btrfs_scrub_pause_super(struct btrfs_root *root);
int btrfs_scrub_continue(struct btrfs_root *root);
int btrfs_scrub_continue_super(struct btrfs_root *root);
int btrfs_scrub_cancel(struct btrfs_root *root);
int btrfs_scrub_cancel_dev(struct btrfs_root *root, struct btrfs_device *dev);
int btrfs_scrub_cancel_devid(struct btrfs_root *root, u64 devid);
int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
			 struct btrfs_scrub_progress *progress);

2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886
/* reada.c */
struct reada_control {
	struct btrfs_root	*root;		/* tree to prefetch */
	struct btrfs_key	key_start;
	struct btrfs_key	key_end;	/* exclusive */
	atomic_t		elems;
	struct kref		refcnt;
	wait_queue_head_t	wait;
};
struct reada_control *btrfs_reada_add(struct btrfs_root *root,
			      struct btrfs_key *start, struct btrfs_key *end);
int btrfs_reada_wait(void *handle);
void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
			 u64 start, int err);

2887
#endif