ctree.h 84.7 KB
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/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

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#ifndef __BTRFS_CTREE__
#define __BTRFS_CTREE__
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#include <linux/version.h>
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#include <linux/mm.h>
#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/kobject.h>
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#include <trace/events/btrfs.h>
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#include <asm/kmap_types.h>
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#include "extent_io.h"
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#include "extent_map.h"
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#include "async-thread.h"
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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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/* 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;
};

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#define BTRFS_UUID_SIZE 16
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struct btrfs_dev_item {
	/* the internal btrfs device id */
	__le64 devid;

	/* size of the device */
	__le64 total_bytes;

	/* bytes used */
	__le64 bytes_used;

	/* optimal io alignment for this device */
	__le32 io_align;

	/* optimal io width for this device */
	__le32 io_width;

	/* minimal io size for this device */
	__le32 sector_size;

	/* type and info about this device */
	__le64 type;

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

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	/*
	 * 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_FSID_SIZE 16
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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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/*
 * 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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} __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)

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;
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	__le64 nbytes;
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	__le64 block_group;
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	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
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	__le64 rdev;
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	__le64 flags;
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	/* 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];
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	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
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} __attribute__ ((__packed__));

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

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

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#define BTRFS_ROOT_SUBVOL_RDONLY	(1ULL << 0)

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struct btrfs_root_item {
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	struct btrfs_inode_item inode;
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	__le64 generation;
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	__le64 root_dirid;
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	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
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	__le64 flags;
626
	__le32 refs;
627 628
	struct btrfs_disk_key drop_progress;
	u8 drop_level;
629
	u8 level;
630
} __attribute__ ((__packed__));
631

632 633 634 635 636 637 638 639 640
/*
 * 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
644

645
struct btrfs_file_extent_item {
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	/*
	 * transaction id that created this extent
	 */
649
	__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? */
671
	u8 type;
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673 674 675 676
	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
	 */
677 678
	__le64 disk_bytenr;
	__le64 disk_num_bytes;
679
	/*
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	 * the logical offset in file blocks (no csums)
681 682 683 684 685 686 687
	 * 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.
690
	 */
691
	__le64 num_bytes;
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693 694
} __attribute__ ((__packed__));

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struct btrfs_csum_item {
696
	u8 csum;
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} __attribute__ ((__packed__));

699 700 701 702
/* different types of block groups (and chunks) */
#define BTRFS_BLOCK_GROUP_DATA     (1 << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM   (1 << 1)
#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
703
#define BTRFS_BLOCK_GROUP_RAID0    (1 << 3)
704
#define BTRFS_BLOCK_GROUP_RAID1    (1 << 4)
705
#define BTRFS_BLOCK_GROUP_DUP	   (1 << 5)
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#define BTRFS_BLOCK_GROUP_RAID10   (1 << 6)
707
#define BTRFS_NR_RAID_TYPES	   5
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struct btrfs_block_group_item {
	__le64 used;
711 712
	__le64 chunk_objectid;
	__le64 flags;
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} __attribute__ ((__packed__));

715 716
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 */
720 721
	u64 bytes_used;		/* total bytes used,
				   this does'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 */
727

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	u64 bytes_may_use;	/* number of bytes that may be used for
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				   delalloc/allocations */
730
	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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734 735 736 737 738 739 740 741 742
	/*
	 * 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;

743
	int full:1;		/* indicates that we cannot allocate any more
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				   chunks for this space */
745 746
	int chunk_alloc:1;	/* set if we are allocating a chunk */

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	int force_alloc;	/* set if we need to force a chunk alloc for
				   this space */

750
	struct list_head list;
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	/* for block groups in our same type */
753
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
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	spinlock_t lock;
755
	struct rw_semaphore groups_sem;
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	atomic_t caching_threads;
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};

759 760 761 762 763 764 765 766 767 768 769 770 771 772
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	u64 freed[2];
	struct btrfs_space_info *space_info;
	struct list_head list;
	spinlock_t lock;
	atomic_t usage;
	unsigned int priority:8;
	unsigned int durable:1;
	unsigned int refill_used:1;
	unsigned int full:1;
};

773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795
/*
 * 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;
796 797
};

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enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
	BTRFS_CACHE_FINISHED	= 2,
};

804 805 806 807 808 809 810 811
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,
};

812 813 814 815 816 817 818 819 820
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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824
	struct btrfs_fs_info *fs_info;
825
	struct inode *inode;
826
	spinlock_t lock;
827
	u64 pinned;
828
	u64 reserved;
829
	u64 reserved_pinned;
830
	u64 bytes_super;
831
	u64 flags;
832 833 834 835
	u64 sectorsize;
	int extents_thresh;
	int free_extents;
	int total_bitmaps;
836 837 838
	unsigned int ro:1;
	unsigned int dirty:1;
	unsigned int iref:1;
839 840

	int disk_cache_state;
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	/* cache tracking stuff */
	int cached;
844 845
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
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847 848 849
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
850
	spinlock_t tree_lock;
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851
	struct rb_root free_space_offset;
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852
	u64 free_space;
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853 854 855 856 857 858

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

	/* for block groups in the same raid type */
	struct list_head list;
859 860 861

	/* usage count */
	atomic_t count;
862 863 864 865 866

	/* 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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};
868

869
struct reloc_control;
870
struct btrfs_device;
871
struct btrfs_fs_devices;
872
struct btrfs_fs_info {
873
	u8 fsid[BTRFS_FSID_SIZE];
874
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
875 876
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
877 878
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
879
	struct btrfs_root *fs_root;
880
	struct btrfs_root *csum_root;
881 882 883

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
884 885

	spinlock_t fs_roots_radix_lock;
886
	struct radix_tree_root fs_roots_radix;
887

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

892 893
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
894

895 896 897
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913
	/* block reservation for extent, checksum and root tree */
	struct btrfs_block_rsv global_block_rsv;
	/* block reservation for delay allocation */
	struct btrfs_block_rsv delalloc_block_rsv;
	/* block reservation for metadata operations */
	struct btrfs_block_rsv trans_block_rsv;
	/* block reservation for chunk tree */
	struct btrfs_block_rsv chunk_block_rsv;

	struct btrfs_block_rsv empty_block_rsv;

	/* list of block reservations that cross multiple transactions */
	struct list_head durable_block_rsv_list;

	struct mutex durable_block_rsv_mutex;

914
	u64 generation;
915
	u64 last_trans_committed;
916 917 918 919 920 921

	/*
	 * 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;
922
	u64 open_ioctl_trans;
923 924
	unsigned long mount_opt:20;
	unsigned long compress_type:4;
925
	u64 max_inline;
926
	u64 alloc_start;
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	struct btrfs_transaction *running_transaction;
928
	wait_queue_head_t transaction_throttle;
929
	wait_queue_head_t transaction_wait;
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	wait_queue_head_t transaction_blocked_wait;
931
	wait_queue_head_t async_submit_wait;
932

933
	struct btrfs_super_block super_copy;
934
	struct btrfs_super_block super_for_commit;
935
	struct block_device *__bdev;
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	struct super_block *sb;
937
	struct inode *btree_inode;
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938
	struct backing_dev_info bdi;
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939
	struct mutex trans_mutex;
940
	struct mutex tree_log_mutex;
941 942
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
943
	struct mutex chunk_mutex;
944
	struct mutex volume_mutex;
945 946 947 948 949 950 951 952
	/*
	 * 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;
953
	struct rw_semaphore extent_commit_sem;
954

955
	struct rw_semaphore cleanup_work_sem;
956

957
	struct rw_semaphore subvol_sem;
958 959
	struct srcu_struct subvol_srcu;

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	struct list_head trans_list;
961
	struct list_head hashers;
962
	struct list_head dead_roots;
963
	struct list_head caching_block_groups;
964

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	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;

968
	atomic_t nr_async_submits;
969
	atomic_t async_submit_draining;
970
	atomic_t nr_async_bios;
971
	atomic_t async_delalloc_pages;
972

973 974 975 976 977
	/*
	 * this is used by the balancing code to wait for all the pending
	 * ordered extents
	 */
	spinlock_t ordered_extent_lock;
978 979 980 981 982 983

	/*
	 * 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
	 */
984
	struct list_head ordered_extents;
985 986 987 988 989 990

	/*
	 * 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.
	 */
991
	struct list_head delalloc_inodes;
992

993 994 995 996 997 998 999
	/*
	 * 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;

1000 1001 1002 1003 1004 1005
	/*
	 * 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.
1006 1007 1008
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1009
	 */
1010
	struct btrfs_workers generic_worker;
1011
	struct btrfs_workers workers;
1012
	struct btrfs_workers delalloc_workers;
1013
	struct btrfs_workers endio_workers;
1014
	struct btrfs_workers endio_meta_workers;
1015
	struct btrfs_workers endio_meta_write_workers;
1016
	struct btrfs_workers endio_write_workers;
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	struct btrfs_workers endio_freespace_worker;
1018
	struct btrfs_workers submit_workers;
1019 1020 1021 1022 1023 1024
	/*
	 * 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;
1025 1026
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1027
	int thread_pool_size;
1028

1029 1030
	struct kobject super_kobj;
	struct completion kobj_unregister;
1031
	int do_barriers;
1032
	int closing;
1033
	int log_root_recovering;
1034
	int enospc_unlink;
1035

1036
	u64 total_pinned;
1037 1038 1039 1040 1041

	/* protected by the delalloc lock, used to keep from writing
	 * metadata until there is a nice batch
	 */
	u64 dirty_metadata_bytes;
1042 1043
	struct list_head dirty_cowonly_roots;

1044
	struct btrfs_fs_devices *fs_devices;
1045 1046 1047 1048 1049 1050

	/*
	 * 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.
	 */
1051
	struct list_head space_info;
1052

1053 1054
	struct reloc_control *reloc_ctl;

1055
	spinlock_t delalloc_lock;
1056
	spinlock_t new_trans_lock;
1057
	u64 delalloc_bytes;
1058 1059 1060 1061 1062 1063

	/* 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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	spinlock_t ref_cache_lock;
	u64 total_ref_cache_size;

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1068 1069 1070 1071 1072 1073
	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
	u64 data_alloc_profile;
	u64 metadata_alloc_profile;
	u64 system_alloc_profile;
1074

1075 1076 1077
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1078
	void *bdev_holder;
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1079 1080 1081

	/* filesystem state */
	u64 fs_state;
1082
};
1083

1084 1085
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1086
 * and for the extent tree extent_root root.
1087 1088
 */
struct btrfs_root {
1089
	struct extent_buffer *node;
1090 1091 1092 1093

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

1094
	struct extent_buffer *commit_root;
1095
	struct btrfs_root *log_root;
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	struct btrfs_root *reloc_root;
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1098 1099
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1100
	struct btrfs_fs_info *fs_info;
1101 1102
	struct extent_io_tree dirty_log_pages;

1103 1104
	struct kobject root_kobj;
	struct completion kobj_unregister;
1105
	struct mutex objectid_mutex;
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1107 1108 1109
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1110
	struct mutex log_mutex;
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1111 1112 1113 1114 1115
	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;
1116
	unsigned long last_log_commit;
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	unsigned long log_batch;
1118 1119
	pid_t log_start_pid;
	bool log_multiple_pids;
1120

1121 1122
	u64 objectid;
	u64 last_trans;
1123 1124 1125 1126 1127 1128 1129 1130 1131 1132

	/* 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;

1133 1134
	u32 stripesize;

1135
	u32 type;
1136 1137

	u64 highest_objectid;
1138
	int ref_cows;
1139
	int track_dirty;
1140 1141
	int in_radix;

1142
	u64 defrag_trans_start;
1143
	struct btrfs_key defrag_progress;
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	struct btrfs_key defrag_max;
1145
	int defrag_running;
1146
	char *name;
1147
	int in_sysfs;
1148 1149 1150

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1151

1152 1153
	struct list_head root_list;

1154
	spinlock_t orphan_lock;
1155
	struct list_head orphan_list;
1156 1157 1158
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_item_inserted;
	int orphan_cleanup_state;
1159

1160 1161 1162 1163
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1164 1165 1166 1167 1168
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
	struct super_block anon_super;
1169 1170
};

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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
1177 1178 1179
#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.
 */
1186 1187 1188 1189
#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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1191
 * extent data is for file data
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 */
1193
#define BTRFS_EXTENT_DATA_KEY	108
1194

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/*
1196 1197
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
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1198
 */
1199
#define BTRFS_EXTENT_CSUM_KEY	128
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1201
/*
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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
 */
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219
#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
 */
1224
#define BTRFS_EXTENT_ITEM_KEY	168
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234

#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
 */
1240
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
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#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
1245

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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

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#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
1255
#define BTRFS_MOUNT_SSD			(1 << 3)
1256
#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)
1259
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
1260
#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)
1264
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
1265
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
1266
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
1267
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
1268 1269 1270 1271 1272

#define btrfs_clear_opt(o, opt)		((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt)		((o) |= BTRFS_MOUNT_##opt)
#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
					 BTRFS_MOUNT_##opt)
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/*
 * Inode flags
 */
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#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
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#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
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#define BTRFS_INODE_PREALLOC		(1 << 4)
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#define BTRFS_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)
1287
#define BTRFS_INODE_COMPRESS		(1 << 11)
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#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

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/* 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)))

1311
#ifndef BTRFS_SETGET_FUNCS
1312
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
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u##bits btrfs_##name(struct extent_buffer *eb, type *s);		\
void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
#endif
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#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
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	type *p = kmap_atomic(eb->first_page, KM_USER0);		\
	u##bits res = le##bits##_to_cpu(p->member);			\
	kunmap_atomic(p, KM_USER0);					\
1323
	return res;							\
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}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
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	type *p = kmap_atomic(eb->first_page, KM_USER0);		\
	p->member = cpu_to_le##bits(val);				\
	kunmap_atomic(p, KM_USER0);					\
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}
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#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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}

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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);
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BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
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BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
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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);
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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);
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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);
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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);
}

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BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
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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);
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BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

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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);
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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);
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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;
}

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static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
}

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

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

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

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/* 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);
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BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
1470 1471

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1472 1473 1474 1475 1476
		   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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/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1480
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1481

1482 1483
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1484
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1485
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1486
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1487
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1488 1489 1490 1491 1492
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);
1493
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1494
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
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1496
static inline struct btrfs_timespec *
1497
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
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{
1499 1500
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, atime);
1501
	return (struct btrfs_timespec *)ptr;
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}

1504
static inline struct btrfs_timespec *
1505
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
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{
1507 1508
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, mtime);
1509
	return (struct btrfs_timespec *)ptr;
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}

1512
static inline struct btrfs_timespec *
1513
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
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{
1515 1516
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, ctime);
1517
	return (struct btrfs_timespec *)ptr;
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}

1520
static inline struct btrfs_timespec *
1521
btrfs_inode_otime(struct btrfs_inode_item *inode_item)
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{
1523 1524
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, otime);
1525
	return (struct btrfs_timespec *)ptr;
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}

1528 1529
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
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1531
/* struct btrfs_dev_extent */
1532 1533 1534 1535 1536 1537
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);
1538 1539
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

1540 1541 1542 1543 1544 1545
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);
}

1546 1547 1548 1549
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);
1550

1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
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);
}
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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);
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/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1610
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
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1612
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
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{
1614 1615 1616 1617
	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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}

1620 1621
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
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{
1623 1624 1625 1626
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
C
Chris Mason 已提交
1627 1628
}

1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645
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);
}

1646
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1647
{
1648 1649
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
1650 1651
}

1652 1653 1654
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

1655 1656
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
1657
{
1658 1659 1660 1661
	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);
1662 1663
}

1664 1665 1666
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1667

1668
static inline unsigned long btrfs_item_nr_offset(int nr)
1669
{
1670 1671
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
1672 1673
}

1674 1675
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
					       int nr)
C
Chris Mason 已提交
1676
{
1677
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
Chris Mason 已提交
1678 1679
}

1680 1681
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
Chris Mason 已提交
1682
{
1683
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
Chris Mason 已提交
1684 1685
}

1686
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1687
{
1688
	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
1689 1690
}

1691
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1692
{
1693
	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
1694 1695
}

1696
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
1697
{
1698
	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
C
Chris Mason 已提交
1699 1700
}

1701 1702
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
1703
{
1704 1705
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1706 1707
}

1708 1709
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
1710
{
1711 1712
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1713 1714
}

1715 1716
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

1717 1718 1719 1720 1721 1722 1723
/*
 * 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);

1724
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
1725
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1726 1727
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1728
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1729

1730 1731 1732
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
1733
{
1734
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1735 1736
}

1737 1738 1739
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
1740
{
1741
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1742 1743
}

1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764
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);
}

1765 1766 1767 1768 1769
/* 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);
1770

C
Chris Mason 已提交
1771 1772 1773 1774
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
1775
	cpu->type = disk->type;
C
Chris Mason 已提交
1776 1777 1778 1779 1780 1781 1782
	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);
1783
	disk->type = cpu->type;
C
Chris Mason 已提交
1784 1785 1786
	disk->objectid = cpu_to_le64(cpu->objectid);
}

1787 1788
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1789
{
1790 1791 1792
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1793 1794
}

1795 1796
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1797
{
1798 1799 1800
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1801 1802
}

1803 1804 1805
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
1806
{
1807 1808 1809
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
1810 1811
}

1812

1813
static inline u8 btrfs_key_type(struct btrfs_key *key)
1814
{
1815
	return key->type;
1816 1817
}

1818
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1819
{
1820
	key->type = val;
1821 1822
}

1823
/* struct btrfs_header */
1824
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1825 1826 1827 1828
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);
1829
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1830
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1831

1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850
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;
}

1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
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);
}

1866
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1867
{
1868 1869
	unsigned long ptr = offsetof(struct btrfs_header, fsid);
	return (u8 *)ptr;
1870 1871
}

1872 1873 1874 1875 1876 1877
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;
}

1878
static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1879
{
1880 1881
	unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
	return (u8 *)ptr;
1882 1883
}

1884
static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1885
{
1886 1887
	unsigned long ptr = offsetof(struct btrfs_header, csum);
	return (u8 *)ptr;
1888 1889
}

1890
static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1891
{
1892
	return NULL;
1893 1894
}

1895
static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1896
{
1897
	return NULL;
1898 1899
}

1900
static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1901
{
1902
	return NULL;
1903 1904
}

1905
static inline int btrfs_is_leaf(struct extent_buffer *eb)
1906
{
C
Chris Mason 已提交
1907
	return btrfs_header_level(eb) == 0;
1908 1909
}

1910
/* struct btrfs_root_item */
1911 1912
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
1913
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1914 1915
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1916

1917 1918
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
1919 1920
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1921 1922
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);
1923
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1924 1925
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
1926 1927
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
C
Chris Mason 已提交
1928

L
Li Zefan 已提交
1929 1930 1931 1932 1933
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
	return root->root_item.flags & BTRFS_ROOT_SUBVOL_RDONLY;
}

1934
/* struct btrfs_super_block */
1935

1936
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1937
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1938 1939 1940
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1941 1942
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
1943 1944
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
1945 1946
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
1947 1948 1949
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,
1950 1951 1952
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
1953 1954
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
1955 1956
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
1957 1958 1959 1960
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);
1961 1962 1963 1964 1965 1966
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);
1967 1968
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
1969 1970
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
1971 1972
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
1973 1974 1975
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,
1976
			 compat_ro_flags, 64);
1977 1978
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
1979 1980
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
1981 1982
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
1983 1984 1985 1986 1987 1988 1989

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];
}
1990

1991
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1992
{
1993
	return offsetof(struct btrfs_leaf, items);
1994 1995
}

1996 1997
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1998

C
Chris Mason 已提交
1999 2000
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
2001
{
2002
	unsigned long offset = (unsigned long)e;
2003
	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2004
	return offset;
2005 2006 2007 2008
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
2009
	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2010 2011
}

2012 2013
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
2014 2015
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
2016 2017
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
2018 2019
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
2020 2021
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051
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;
}
2052

C
Chris Mason 已提交
2053 2054 2055 2056 2057
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

2058 2059 2060 2061
static inline int btrfs_set_root_name(struct btrfs_root *root,
				      const char *name, int len)
{
	/* if we already have a name just free it */
C
Chris Mason 已提交
2062
	kfree(root->name);
2063 2064 2065 2066 2067 2068

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

	memcpy(root->name, name, len);
C
Chris Mason 已提交
2069
	root->name[len] = '\0';
2070 2071 2072 2073

	return 0;
}

C
Chris Mason 已提交
2074 2075
static inline u32 btrfs_level_size(struct btrfs_root *root, int level)
{
2076 2077 2078 2079 2080
	if (level == 0)
		return root->leafsize;
	return root->nodesize;
}

2081 2082
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
2083
	((type *)(btrfs_leaf_data(leaf) + \
2084 2085 2086 2087 2088
	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)))
2089

2090 2091
static inline struct dentry *fdentry(struct file *file)
{
2092 2093 2094
	return file->f_path.dentry;
}

2095 2096 2097 2098 2099 2100
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));
}

C
Chris Mason 已提交
2101
/* extent-tree.c */
2102
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2103 2104
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
Z
Zheng Yan 已提交
2105
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
2106 2107 2108
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
			     u64 num_bytes, u64 *refs, u64 *flags);
2109 2110
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
2111 2112
int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct extent_buffer *leaf);
Y
Yan Zheng 已提交
2113
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
2114 2115
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
2116
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
C
Chris Mason 已提交
2117 2118 2119
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
2120
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
2121 2122
u64 btrfs_find_block_group(struct btrfs_root *root,
			   u64 search_start, u64 search_hint, int owner);
2123
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2124 2125 2126 2127
					struct btrfs_root *root, u32 blocksize,
					u64 parent, u64 root_objectid,
					struct btrfs_disk_key *key, int level,
					u64 hint, u64 empty_size);
2128 2129 2130 2131
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
			   u64 parent, int last_ref);
2132 2133
struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
					    struct btrfs_root *root,
2134 2135
					    u64 bytenr, u32 blocksize,
					    int level);
2136 2137 2138 2139 2140 2141 2142 2143
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);
2144 2145 2146 2147 2148 2149
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);
2150
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2151 2152 2153 2154 2155 2156 2157
		  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
2158 2159 2160
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
		      u64 bytenr, u64 num_bytes, u64 parent,
2161 2162
		      u64 root_objectid, u64 owner, u64 offset);

2163
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
2164 2165
int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
				u64 num_bytes, int reserve, int sinfo);
2166 2167
int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
C
Chris Mason 已提交
2168
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2169
			       struct btrfs_root *root);
C
Chris Mason 已提交
2170
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
2171 2172
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
2173 2174
			 u64 root_objectid, u64 owner, u64 offset);

C
Chris Mason 已提交
2175 2176
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
2177
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
2178 2179
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
2180
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
2181 2182
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
2183
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
2184
			   u64 size);
Z
Zheng Yan 已提交
2185 2186
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 group_start);
Y
Yan Zheng 已提交
2187
u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
2188
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
J
Josef Bacik 已提交
2189
void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
2190
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
2191 2192
int btrfs_check_data_free_space(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
2193 2194
int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
2195
				int num_items);
2196 2197
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
2198 2199 2200
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
2201 2202
int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_pending_snapshot *pending);
2203 2204 2205 2206
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);
2207 2208 2209 2210 2211 2212 2213 2214 2215
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root);
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info,
				 struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_block_rsv *block_rsv,
2216
			u64 num_bytes);
2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230
int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root,
			  struct btrfs_block_rsv *block_rsv,
			  u64 min_reserved, int min_factor);
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
int btrfs_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);
2231
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
2232
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
2233 2234 2235
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,
2236
			       u64 num_bytes, u64 *actual_bytes);
2237 2238
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
2239
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
2240

2241
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
C
Chris Mason 已提交
2242
/* ctree.c */
2243 2244 2245
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);
2246 2247 2248
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
Z
Zheng Yan 已提交
2249 2250 2251
int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, struct btrfs_path *path,
			    struct btrfs_key *new_key);
2252 2253
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
2254
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
2255 2256 2257
			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,
2258
			 struct btrfs_key *max_key,
2259 2260
			 struct btrfs_path *path, int cache_only,
			 u64 min_trans);
2261 2262 2263
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
2264
		    struct extent_buffer **cow_ret);
2265 2266 2267 2268
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);
2269 2270
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
2271 2272
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
2273 2274 2275
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_path *path,
2276
			u32 new_size, int from_end);
2277 2278 2279 2280 2281
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
2282 2283 2284 2285
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
2286 2287 2288
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);
2289
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2290
		       struct btrfs_root *root, struct extent_buffer *parent,
2291 2292
		       int start_slot, int cache_only, u64 *last_ret,
		       struct btrfs_key *progress);
C
Chris Mason 已提交
2293
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
C
Chris Mason 已提交
2294 2295
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
2296 2297 2298
void btrfs_set_path_blocking(struct btrfs_path *p);
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

2299 2300 2301 2302 2303 2304 2305 2306 2307
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);
}

2308 2309
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
2310 2311 2312 2313 2314
int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path,
			    struct btrfs_key *cpu_key, u32 *data_size,
			    int nr);
2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328
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
2329
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2330
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2331
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2332 2333
int btrfs_drop_snapshot(struct btrfs_root *root,
			struct btrfs_block_rsv *block_rsv, int update_ref);
Y
Yan Zheng 已提交
2334 2335 2336 2337
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
C
Chris Mason 已提交
2338
/* root-item.c */
2339
int btrfs_find_root_ref(struct btrfs_root *tree_root,
2340 2341
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
2342 2343
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
2344 2345 2346 2347 2348
		       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,
2349
		       const char *name, int name_len);
2350 2351 2352 2353 2354 2355 2356 2357 2358 2359
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);
2360 2361
int btrfs_search_root(struct btrfs_root *root, u64 search_start,
		      u64 *found_objectid);
2362
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid);
2363
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
2364 2365
int btrfs_set_root_node(struct btrfs_root_item *item,
			struct extent_buffer *node);
2366 2367
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);

C
Chris Mason 已提交
2368
/* dir-item.c */
C
Chris Mason 已提交
2369 2370 2371
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
			  int name_len, u64 dir,
2372
			  struct btrfs_key *location, u8 type, u64 index);
2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383
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);
2384 2385 2386 2387
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);
2388 2389
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
			      struct btrfs_path *path,
2390
			      const char *name, int name_len);
2391 2392 2393 2394
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
2395
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2396 2397 2398 2399
			    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
2400 2401 2402 2403 2404
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);
2405 2406 2407
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
2408 2409 2410 2411 2412 2413

/* 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);
2414
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
2415

C
Chris Mason 已提交
2416
/* inode-map.c */
2417 2418 2419
int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
			     struct btrfs_root *fs_root,
			     u64 dirid, u64 *objectid);
C
Chris Mason 已提交
2420 2421
int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);

C
Chris Mason 已提交
2422
/* inode-item.c */
2423 2424 2425
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
2426
			   u64 inode_objectid, u64 ref_objectid, u64 index);
2427 2428 2429
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
2430
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
2431 2432 2433 2434 2435 2436
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);
2437 2438 2439
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
2440
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2441 2442
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
2443 2444

/* file-item.c */
2445 2446
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
2447
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
2448
			  struct bio *bio, u32 *dst);
2449 2450
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
2451
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
2452 2453 2454 2455 2456
			     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
2457 2458 2459
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
2460
			     u64 bytenr, int mod);
2461
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
2462
			   struct btrfs_root *root,
2463
			   struct btrfs_ordered_sum *sums);
2464
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
2465
		       struct bio *bio, u64 file_start, int contig);
C
Chris Mason 已提交
2466 2467
int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
			  u64 start, unsigned long len);
C
Chris Mason 已提交
2468 2469 2470
struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
2471
					  u64 bytenr, int cow);
C
Chris Mason 已提交
2472 2473 2474
int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct btrfs_path *path,
			u64 isize);
2475 2476
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start,
			     u64 end, struct list_head *list);
C
Chris Mason 已提交
2477
/* inode.c */
2478 2479

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
2480
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
2481 2482 2483 2484 2485
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

2486 2487
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
2488 2489 2490 2491 2492 2493 2494
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);
2495 2496 2497 2498
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
2499 2500 2501 2502 2503
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
2504
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
J
Josef Bacik 已提交
2505 2506
int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
				   int sync);
2507 2508
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
2509 2510
int btrfs_writepages(struct address_space *mapping,
		     struct writeback_control *wbc);
2511
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
2512
			     struct btrfs_root *new_root,
2513
			     u64 new_dirid, u64 alloc_hint);
2514
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
C
Chris Mason 已提交
2515
			 size_t size, struct bio *bio, unsigned long bio_flags);
2516

2517 2518 2519
unsigned long btrfs_force_ra(struct address_space *mapping,
			      struct file_ra_state *ra, struct file *file,
			      pgoff_t offset, pgoff_t last_index);
2520
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
2521
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
2522
void btrfs_evict_inode(struct inode *inode);
2523
void btrfs_put_inode(struct inode *inode);
2524
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
C
Chris Mason 已提交
2525 2526 2527
void btrfs_dirty_inode(struct inode *inode);
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
2528
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
2529 2530
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
2531
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
2532
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
2533
			 struct btrfs_root *root, int *was_new);
C
Chris Mason 已提交
2534 2535
int btrfs_commit_write(struct file *file, struct page *page,
		       unsigned from, unsigned to);
2536 2537 2538 2539 2540 2541
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
				    size_t page_offset, u64 start, u64 end,
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
2542 2543
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
2544
int btrfs_orphan_cleanup(struct btrfs_root *root);
2545 2546 2547 2548 2549 2550 2551
void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans,
				struct btrfs_pending_snapshot *pending,
				u64 *bytes_to_reserve);
void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans,
				struct btrfs_pending_snapshot *pending);
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
2552
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
2553
int btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
2554 2555
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
2556 2557 2558
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);
2559 2560 2561 2562
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);
2563
extern const struct dentry_operations btrfs_dentry_operations;
C
Christoph Hellwig 已提交
2564 2565 2566

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
2567 2568
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
C
Christoph Hellwig 已提交
2569

C
Chris Mason 已提交
2570
/* file.c */
2571
int btrfs_sync_file(struct file *file, int datasync);
2572 2573
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			    int skip_pinned);
2574
int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
2575
extern const struct file_operations btrfs_file_operations;
Y
Yan, Zheng 已提交
2576 2577
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
2578 2579
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
2580
int btrfs_release_file(struct inode *inode, struct file *file);
2581 2582 2583 2584 2585
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
2586

2587 2588 2589
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, int cache_only);
2590 2591 2592 2593 2594 2595 2596 2597 2598

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

J
Josef Bacik 已提交
2599 2600
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
2601

2602
/* super.c */
2603
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
2604
int btrfs_sync_fs(struct super_block *sb, int wait);
L
liubo 已提交
2605 2606 2607 2608 2609 2610 2611 2612
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
2613 2614

/* acl.c */
C
Chris Mason 已提交
2615
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
2616
int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
A
Al Viro 已提交
2617 2618 2619
#else
#define btrfs_check_acl NULL
#endif
2620 2621
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
J
Josef Bacik 已提交
2622
int btrfs_acl_chmod(struct inode *inode);
J
Josef Bacik 已提交
2623

2624 2625 2626 2627 2628 2629 2630 2631
/* 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);
2632 2633 2634 2635 2636 2637 2638 2639
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);
2640
#endif