ctree.h 51.6 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/workqueue.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <asm/kmap_types.h>
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#include "bit-radix.h"
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#include "extent_io.h"
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#include "extent_map.h"
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#include "async-thread.h"
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struct btrfs_trans_handle;
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struct btrfs_transaction;
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extern struct kmem_cache *btrfs_trans_handle_cachep;
extern struct kmem_cache *btrfs_transaction_cachep;
extern struct kmem_cache *btrfs_bit_radix_cachep;
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extern struct kmem_cache *btrfs_path_cachep;
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#define BTRFS_MAGIC "_B5RfS_M"
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#define BTRFS_MAX_LEVEL 8
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/* holds pointers to all of the tree roots */
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#define BTRFS_ROOT_TREE_OBJECTID 1ULL
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/* stores information about which extents are in use, and reference counts */
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#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
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/*
 * 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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/*
 * All files have objectids higher than this.
 */
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
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/*
 * the device items go into the chunk tree.  The key is in the form
 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
 */
#define BTRFS_DEV_ITEMS_OBJECTID 1ULL

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

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/* 32 bytes in various csum fields */
#define BTRFS_CSUM_SIZE 32
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/* four bytes for CRC32 */
#define BTRFS_CRC32_SIZE 4
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#define BTRFS_EMPTY_DIR_SIZE 0
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#define BTRFS_FT_UNKNOWN	0
#define BTRFS_FT_REG_FILE	1
#define BTRFS_FT_DIR		2
#define BTRFS_FT_CHRDEV		3
#define BTRFS_FT_BLKDEV		4
#define BTRFS_FT_FIFO		5
#define BTRFS_FT_SOCK		6
#define BTRFS_FT_SYMLINK	7
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#define BTRFS_FT_XATTR		8
#define BTRFS_FT_MAX		9
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/*
 * the key defines the order in the tree, and so it also defines (optimal)
 * block layout.  objectid corresonds to the inode number.  The flags
 * tells us things about the object, and is a kind of stream selector.
 * so for a given inode, keys with flags of 1 might refer to the inode
 * data, flags of 2 may point to file data in the btree and flags == 3
 * may point to extents.
 *
 * offset is the starting byte offset for this key in the stream.
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 *
 * btrfs_disk_key is in disk byte order.  struct btrfs_key is always
 * in cpu native order.  Otherwise they are identical and their sizes
 * should be the same (ie both packed)
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 */
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struct btrfs_disk_key {
	__le64 objectid;
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	u8 type;
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	__le64 offset;
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} __attribute__ ((__packed__));

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

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struct btrfs_mapping_tree {
	struct extent_map_tree map_tree;
};

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

	/* size of the device */
	__le64 total_bytes;

	/* bytes used */
	__le64 bytes_used;

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

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

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

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

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	/* 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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} __attribute__ ((__packed__));

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

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

	/* objectid of the root referencing this chunk */
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	__le64 owner;
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	__le64 stripe_len;
	__le64 type;

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

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

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

	/* 2^16 stripes is quite a lot, a second limit is the size of a single
	 * item in the btree
	 */
	__le16 num_stripes;
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	/* sub stripes only matter for raid10 */
	__le16 sub_stripes;
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	struct btrfs_stripe stripe;
	/* additional stripes go here */
} __attribute__ ((__packed__));

static inline unsigned long btrfs_chunk_item_size(int num_stripes)
{
	BUG_ON(num_stripes == 0);
	return sizeof(struct btrfs_chunk) +
		sizeof(struct btrfs_stripe) * (num_stripes - 1);
}

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

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

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#define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
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			        sizeof(struct btrfs_header)) / \
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			        sizeof(struct btrfs_key_ptr))
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#define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
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#define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
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#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
					sizeof(struct btrfs_item) - \
					sizeof(struct btrfs_file_extent_item))
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/*
 * 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[16];    /* 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 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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	u8 root_level;
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	u8 chunk_root_level;
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	struct btrfs_dev_item dev_item;
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	char label[BTRFS_LABEL_SIZE];
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	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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} __attribute__ ((__packed__));

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

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/*
 * leaves have an item area and a data area:
 * [item0, item1....itemN] [free space] [dataN...data1, data0]
 *
 * The data is separate from the items to get the keys closer together
 * during searches.
 */
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struct btrfs_leaf {
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	struct btrfs_header header;
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	struct btrfs_item items[];
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} __attribute__ ((__packed__));

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

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

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/*
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 * btrfs_paths remember the path taken from the root down to the leaf.
 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
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 * to any other levels that are present.
 *
 * The slots array records the index of the item or block pointer
 * used while walking the tree.
 */
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struct btrfs_path {
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	struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
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	int slots[BTRFS_MAX_LEVEL];
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	int reada;
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	int lowest_level;
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};
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/*
 * items in the extent btree are used to record the objectid of the
 * owner of the block and the number of references
 */
struct btrfs_extent_item {
	__le32 refs;
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} __attribute__ ((__packed__));

struct btrfs_extent_ref {
	__le64 root;
	__le64 generation;
	__le64 objectid;
	__le64 offset;
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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 {
	__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__));

/*
 * there is no padding here on purpose.  If you want to extent the inode,
 * make a new item type
 */
struct btrfs_inode_item {
	__le64 generation;
	__le64 size;
	__le64 nblocks;
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	__le64 block_group;
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	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
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	__le64 rdev;
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	__le16 flags;
	__le16 compat_flags;
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	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
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} __attribute__ ((__packed__));

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

struct btrfs_root_item {
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	struct btrfs_inode_item inode;
	__le64 root_dirid;
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	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le32 flags;
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	__le32 refs;
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	struct btrfs_disk_key drop_progress;
	u8 drop_level;
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	u8 level;
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} __attribute__ ((__packed__));
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#define BTRFS_FILE_EXTENT_REG 0
#define BTRFS_FILE_EXTENT_INLINE 1

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struct btrfs_file_extent_item {
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	__le64 generation;
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	u8 type;
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	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
	 */
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	__le64 disk_bytenr;
	__le64 disk_num_bytes;
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	/*
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	 * the logical offset in file blocks (no csums)
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	 * this extent record is for.  This allows a file extent to point
	 * into the middle of an existing extent on disk, sharing it
	 * between two snapshots (useful if some bytes in the middle of the
	 * extent have changed
	 */
	__le64 offset;
	/*
	 * the logical number of file blocks (no csums included)
	 */
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	__le64 num_bytes;
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} __attribute__ ((__packed__));

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

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

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struct btrfs_space_info {
	u64 flags;
	u64 total_bytes;
	u64 bytes_used;
	u64 bytes_pinned;
	int full;
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	int force_alloc;
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	struct list_head list;
};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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	struct btrfs_space_info *space_info;
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	u64 pinned;
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	u64 flags;
	int cached;
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	int ro;
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};
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struct btrfs_device;
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struct btrfs_fs_devices;
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struct btrfs_fs_info {
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	u8 fsid[BTRFS_FSID_SIZE];
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	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
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	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
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	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
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	struct radix_tree_root fs_roots_radix;
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	struct extent_io_tree free_space_cache;
	struct extent_io_tree block_group_cache;
	struct extent_io_tree pinned_extents;
	struct extent_io_tree pending_del;
	struct extent_io_tree extent_ins;
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	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

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	u64 generation;
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	u64 last_trans_committed;
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	unsigned long mount_opt;
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	u64 max_extent;
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	u64 max_inline;
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	u64 alloc_start;
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	struct btrfs_transaction *running_transaction;
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	struct btrfs_super_block super_copy;
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	struct btrfs_super_block super_for_commit;
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	struct block_device *__bdev;
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	struct super_block *sb;
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	struct inode *btree_inode;
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	struct backing_dev_info bdi;
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	spinlock_t hash_lock;
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	struct mutex trans_mutex;
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	struct mutex fs_mutex;
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	struct list_head trans_list;
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	struct list_head hashers;
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	struct list_head dead_roots;
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	struct list_head end_io_work_list;
	struct work_struct end_io_work;
	spinlock_t end_io_work_lock;
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	atomic_t nr_async_submits;
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	/*
	 * 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.
	 */
	struct btrfs_workers workers;
	struct btrfs_workers endio_workers;

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#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
	struct work_struct trans_work;
#else
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	struct delayed_work trans_work;
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#endif
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	struct kobject super_kobj;
	struct completion kobj_unregister;
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	int do_barriers;
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	int closing;
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	unsigned long throttles;
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	u64 total_pinned;
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	struct list_head dirty_cowonly_roots;

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	struct btrfs_fs_devices *fs_devices;
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	struct list_head space_info;
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	spinlock_t delalloc_lock;
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	spinlock_t new_trans_lock;
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	u64 delalloc_bytes;
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	u64 last_alloc;
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	u64 last_data_alloc;
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	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
	u64 data_alloc_profile;
	u64 metadata_alloc_profile;
	u64 system_alloc_profile;
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	void *bdev_holder;
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};
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/*
 * in ram representation of the tree.  extent_root is used for all allocations
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 * and for the extent tree extent_root root.
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 */
struct btrfs_root {
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	struct extent_buffer *node;
	struct extent_buffer *commit_root;
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	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
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	struct btrfs_fs_info *fs_info;
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	struct inode *inode;
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	struct kobject root_kobj;
	struct completion kobj_unregister;
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	u64 objectid;
	u64 last_trans;
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	/* 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;

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	u32 stripesize;

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	u32 type;
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	u64 highest_inode;
	u64 last_inode_alloc;
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	int ref_cows;
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	int track_dirty;
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	struct btrfs_key defrag_progress;
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	struct btrfs_key defrag_max;
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	int defrag_running;
	int defrag_level;
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	char *name;
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	int in_sysfs;
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	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
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};

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/*
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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
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#define BTRFS_INODE_REF_KEY		2
#define BTRFS_XATTR_ITEM_KEY		8
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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.
 */
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#define BTRFS_DIR_ITEM_KEY	16
#define BTRFS_DIR_INDEX_KEY	17
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/*
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 * extent data is for file data
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 */
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#define BTRFS_EXTENT_DATA_KEY	18
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/*
 * csum items have the checksums for data in the extents
 */
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#define BTRFS_CSUM_ITEM_KEY	19

/* reserve 20-31 for other file stuff */
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/*
 * root items point to tree roots.  There are typically in the root
 * tree used by the super block to find all the other trees
 */
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#define BTRFS_ROOT_ITEM_KEY	32
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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
 */
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#define BTRFS_EXTENT_ITEM_KEY	33
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#define BTRFS_EXTENT_REF_KEY	34
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/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
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#define BTRFS_BLOCK_GROUP_ITEM_KEY 50
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#define BTRFS_DEV_EXTENT_KEY	75
#define BTRFS_DEV_ITEM_KEY	76
#define BTRFS_CHUNK_ITEM_KEY	77

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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)
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#define BTRFS_MOUNT_SSD			(1 << 3)
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#define BTRFS_MOUNT_DEGRADED		(1 << 4)
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#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_clear_flag(inode, flag)	(BTRFS_I(inode)->flags &= \
					 ~BTRFS_INODE_##flag)
#define btrfs_set_flag(inode, flag)	(BTRFS_I(inode)->flags |= \
					 BTRFS_INODE_##flag)
#define btrfs_test_flag(inode, flag)	(BTRFS_I(inode)->flags & \
					 BTRFS_INODE_##flag)
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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)))

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#ifndef BTRFS_SETGET_FUNCS
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#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);					\
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	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);
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_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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static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
{
	return (char *)d + offsetof(struct btrfs_dev_item, uuid);
}

776
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));
}

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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);
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BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
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		   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);

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/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
878
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
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BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
		   compat_flags, 16);
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883
static inline struct btrfs_timespec *
884
btrfs_inode_atime(struct btrfs_inode_item *inode_item)
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{
886 887
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, atime);
888
	return (struct btrfs_timespec *)ptr;
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}

891
static inline struct btrfs_timespec *
892
btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
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{
894 895
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, mtime);
896
	return (struct btrfs_timespec *)ptr;
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}

899
static inline struct btrfs_timespec *
900
btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
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{
902 903
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, ctime);
904
	return (struct btrfs_timespec *)ptr;
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}

907
static inline struct btrfs_timespec *
908
btrfs_inode_otime(struct btrfs_inode_item *inode_item)
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{
910 911
	unsigned long ptr = (unsigned long)inode_item;
	ptr += offsetof(struct btrfs_inode_item, otime);
912
	return (struct btrfs_timespec *)ptr;
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}

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BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
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/* struct btrfs_extent_item */
BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
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921
/* struct btrfs_dev_extent */
922 923 924 925 926 927
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);
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BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

930 931 932 933 934 935
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);
}

936 937 938 939 940 941
/* struct btrfs_extent_ref */
BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);

942 943
BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
944
			 generation, 64);
945 946 947
BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
			 objectid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
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BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
			 refs, 32);
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/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
954
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
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956
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
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{
958 959 960 961
	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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}

964 965
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
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{
967 968 969 970
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
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}

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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);
}

990
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
991
{
992 993
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
994 995
}

996 997 998
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

999 1000
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
1001
{
1002 1003 1004 1005
	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);
1006 1007
}

1008 1009 1010
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1011

1012
static inline unsigned long btrfs_item_nr_offset(int nr)
1013
{
1014 1015
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
1016 1017
}

1018 1019
static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
					       int nr)
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{
1021
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
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}

1024 1025
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
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{
1027
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
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}

1030
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
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{
1032
	return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
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}

1035
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
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{
1037
	return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
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}

1040
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
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{
1042
	return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
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}

1045 1046
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
1047
{
1048 1049
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1050 1051
}

1052 1053
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
1054
{
1055 1056
	struct btrfs_item *item = btrfs_item_nr(eb, nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1057 1058
}

1059
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
1060
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1061 1062
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1063

1064 1065 1066
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
1067
{
1068
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1069 1070
}

1071 1072 1073
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
1074
{
1075
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1076 1077
}

1078 1079 1080 1081 1082
/* 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);
1083

C
Chris Mason 已提交
1084 1085 1086 1087
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
1088
	cpu->type = disk->type;
C
Chris Mason 已提交
1089 1090 1091 1092 1093 1094 1095
	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);
1096
	disk->type = cpu->type;
C
Chris Mason 已提交
1097 1098 1099
	disk->objectid = cpu_to_le64(cpu->objectid);
}

1100 1101
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1102
{
1103 1104 1105
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1106 1107
}

1108 1109
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
1110
{
1111 1112 1113
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
1114 1115
}

1116 1117 1118
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
1119
{
1120 1121 1122
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
1123 1124
}

1125

1126
static inline u8 btrfs_key_type(struct btrfs_key *key)
1127
{
1128
	return key->type;
1129 1130
}

1131
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1132
{
1133
	key->type = val;
1134 1135
}

1136
/* struct btrfs_header */
1137
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1138 1139 1140 1141
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);
1142
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1143
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1144

1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
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;
}

1164
static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1165
{
1166 1167
	unsigned long ptr = offsetof(struct btrfs_header, fsid);
	return (u8 *)ptr;
1168 1169
}

1170 1171 1172 1173 1174 1175
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;
}

1176
static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1177
{
1178 1179
	unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
	return (u8 *)ptr;
1180 1181
}

1182
static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1183
{
1184 1185
	unsigned long ptr = offsetof(struct btrfs_header, csum);
	return (u8 *)ptr;
1186 1187
}

1188
static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1189
{
1190
	return NULL;
1191 1192
}

1193
static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1194
{
1195
	return NULL;
1196 1197
}

1198
static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1199
{
1200
	return NULL;
1201 1202
}

1203
static inline int btrfs_is_leaf(struct extent_buffer *eb)
1204
{
1205
	return (btrfs_header_level(eb) == 0);
1206 1207
}

1208 1209
/* struct btrfs_root_item */
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1210 1211
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1212

1213 1214
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1215 1216 1217
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1218 1219
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);
C
Chris Mason 已提交
1220

1221
/* struct btrfs_super_block */
1222
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1223
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1224 1225 1226
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1227 1228
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
1229 1230
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
1231 1232 1233 1234
BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
			 chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
			 chunk_root_level, 64);
1235 1236 1237 1238
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);
1239 1240 1241 1242 1243 1244
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);
1245 1246
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
1247 1248
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
1249 1250
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
1251

1252
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1253
{
1254
	return offsetof(struct btrfs_leaf, items);
1255 1256
}

1257 1258
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1259

1260
static inline unsigned long btrfs_file_extent_inline_start(struct
1261 1262
						   btrfs_file_extent_item *e)
{
1263
	unsigned long offset = (unsigned long)e;
1264
	offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1265
	return offset;
1266 1267 1268 1269
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
1270
	return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1271 1272
}

1273 1274
static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
					       struct btrfs_item *e)
1275
{
1276
	unsigned long offset;
1277
	offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1278
	return btrfs_item_size(eb, e) - offset;
1279 1280
}

1281 1282
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
1283 1284
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
1285 1286
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
1287 1288
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
1289 1290
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
1291

C
Chris Mason 已提交
1292 1293 1294 1295 1296
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313
static inline int btrfs_set_root_name(struct btrfs_root *root,
				      const char *name, int len)
{
	/* if we already have a name just free it */
	if (root->name)
		kfree(root->name);

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

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

	return 0;
}

1314 1315 1316 1317 1318 1319
static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
	if (level == 0)
		return root->leafsize;
	return root->nodesize;
}

1320 1321
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
1322
	((type *)(btrfs_leaf_data(leaf) + \
1323 1324 1325 1326 1327
	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)))
1328

1329 1330 1331 1332 1333 1334 1335 1336
static inline struct dentry *fdentry(struct file *file) {
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
	return file->f_dentry;
#else
	return file->f_path.dentry;
#endif
}

C
Chris Mason 已提交
1337
/* extent-tree.c */
1338 1339
u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
				  struct btrfs_path *count_path,
1340
				  u64 expected_owner, u64 first_extent);
1341 1342
int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root);
1343
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1344 1345
struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
							 btrfs_fs_info *info,
1346
							 u64 bytenr);
1347 1348
struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
						 struct btrfs_block_group_cache
C
Chris Mason 已提交
1349
						 *hint, u64 search_start,
1350
						 int data, int owner);
C
Chris Mason 已提交
1351
int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1352
		       struct btrfs_root *root, u64 owner_objectid);
1353
struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1354
					    struct btrfs_root *root, u32 size,
1355
					    u64 root_objectid,
1356
					    u64 hint, u64 empty_size);
1357 1358 1359 1360 1361 1362 1363 1364 1365
struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
					     struct btrfs_root *root,
					     u32 blocksize,
					     u64 root_objectid,
					     u64 ref_generation,
					     u64 first_objectid,
					     int level,
					     u64 hint,
					     u64 empty_size);
1366 1367 1368
int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 new_size);
int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1369 1370 1371 1372 1373
int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root,
				 struct btrfs_path *path, u64 bytenr,
				 u64 root_objectid, u64 ref_generation,
				 u64 owner, u64 owner_offset);
1374
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1375
		       struct btrfs_root *root,
1376 1377
		       u64 num_bytes, u64 min_bytes,
		       u64 root_objectid, u64 ref_generation,
1378 1379
		       u64 owner, u64 owner_offset,
		       u64 empty_size, u64 hint_byte,
1380
		       u64 search_end, struct btrfs_key *ins, u64 data);
1381
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1382
		  struct extent_buffer *buf);
1383
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1384 1385 1386
		      *root, u64 bytenr, u64 num_bytes,
		      u64 root_objectid, u64 ref_generation,
		      u64 owner_objectid, u64 owner_offset, int pin);
C
Chris Mason 已提交
1387 1388
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
1389
			       struct extent_io_tree *unpin);
C
Chris Mason 已提交
1390 1391
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
1392 1393 1394
				u64 bytenr, u64 num_bytes,
				u64 root_objectid, u64 ref_generation,
				u64 owner, u64 owner_offset);
C
Chris Mason 已提交
1395 1396 1397 1398
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
1399 1400
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
1401
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
1402
			   u64 size);
C
Chris Mason 已提交
1403
/* ctree.c */
1404 1405 1406
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
1407 1408 1409 1410
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
		    struct extent_buffer **cow_ret);
1411 1412 1413 1414
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);
1415 1416
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
1417 1418 1419
int btrfs_truncate_item(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct btrfs_path *path,
1420
			u32 new_size, int from_end);
1421 1422 1423
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);
1424
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1425
		       struct btrfs_root *root, struct extent_buffer *parent,
1426 1427
		       int start_slot, int cache_only, u64 *last_ret,
		       struct btrfs_key *progress);
C
Chris Mason 已提交
1428
void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
C
Chris Mason 已提交
1429 1430
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
C
Chris Mason 已提交
1431
void btrfs_init_path(struct btrfs_path *p);
1432 1433 1434 1435 1436 1437 1438 1439 1440 1441
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);
}

1442 1443
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
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
1458
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1459
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1460
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1461
int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1462
			*root);
C
Chris Mason 已提交
1463
/* root-item.c */
1464 1465 1466 1467 1468 1469 1470 1471 1472 1473
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);
1474 1475
int btrfs_search_root(struct btrfs_root *root, u64 search_start,
		      u64 *found_objectid);
1476 1477
int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
			  struct btrfs_root *latest_root);
C
Chris Mason 已提交
1478
/* dir-item.c */
1479
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1480 1481
			  *root, const char *name, int name_len, u64 dir,
			  struct btrfs_key *location, u8 type);
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
					     struct btrfs_root *root,
					     struct btrfs_path *path, u64 dir,
					     const char *name, int name_len,
					     int mod);
struct btrfs_dir_item *
btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 dir,
			    u64 objectid, const char *name, int name_len,
			    int mod);
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
			      struct btrfs_path *path,
1495
			      const char *name, int name_len);
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int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct btrfs_path *path,
			      struct btrfs_dir_item *di);
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Josef Bacik 已提交
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int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, const char *name,
			    u16 name_len, const void *data, u16 data_len,
			    u64 dir);
struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path, u64 dir,
					  const char *name, u16 name_len,
					  int mod);
C
Chris Mason 已提交
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/* inode-map.c */
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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
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int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);

C
Chris Mason 已提交
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/* inode-item.c */
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int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   u64 inode_objectid, u64 ref_objectid);
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   u64 inode_objectid, u64 ref_objectid);
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int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
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int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
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		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
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/* file-item.c */
C
Chris Mason 已提交
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int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
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			       struct btrfs_root *root,
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Sage Weil 已提交
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			       u64 objectid, u64 pos, u64 disk_offset,
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			       u64 disk_num_bytes,
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Sage Weil 已提交
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			     u64 num_bytes, u64 offset);
C
Chris Mason 已提交
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int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
1540
			     u64 bytenr, int mod);
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int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, struct inode *inode,
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			   struct bio *bio, char *sums);
int btrfs_csum_one_bio(struct btrfs_root *root,
		       struct bio *bio, char **sums_ret);
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Chris Mason 已提交
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struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
					  struct btrfs_root *root,
					  struct btrfs_path *path,
					  u64 objectid, u64 offset,
					  int cow);
C
Chris Mason 已提交
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int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct btrfs_path *path,
			u64 isize);
C
Chris Mason 已提交
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/* inode.c */
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void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
				  int namelen);

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int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
			 size_t size, struct bio *bio);

C
Chris Mason 已提交
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static inline void dec_i_blocks(struct inode *inode, u64 dec)
{
	dec = dec >> 9;
	if (dec <= inode->i_blocks)
		inode->i_blocks -= dec;
	else
		inode->i_blocks = 0;
}

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unsigned long btrfs_force_ra(struct address_space *mapping,
			      struct file_ra_state *ra, struct file *file,
			      pgoff_t offset, pgoff_t last_index);
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int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
			   int for_del);
C
Chris Mason 已提交
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int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
int btrfs_readpage(struct file *file, struct page *page);
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Chris Mason 已提交
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void btrfs_delete_inode(struct inode *inode);
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void btrfs_put_inode(struct inode *inode);
C
Chris Mason 已提交
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void btrfs_read_locked_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, int wait);
void btrfs_dirty_inode(struct inode *inode);
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
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Sage Weil 已提交
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long btrfs_ioctl_trans_end(struct file *file);
C
Christoph Hellwig 已提交
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long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
C
Chris Mason 已提交
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struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
				struct btrfs_root *root);
C
Chris Mason 已提交
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struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
			    u64 root_objectid);
C
Chris Mason 已提交
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int btrfs_commit_write(struct file *file, struct page *page,
		       unsigned from, unsigned to);
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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);
C
Chris Mason 已提交
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/* file.c */
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int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
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int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
C
Chris Mason 已提交
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extern struct file_operations btrfs_file_operations;
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode,
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		       u64 start, u64 end, u64 inline_limit, u64 *hint_block);
S
Sage Weil 已提交
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int btrfs_release_file(struct inode *inode, struct file *file);

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/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, int cache_only);
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/* 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);

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Josef Bacik 已提交
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/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
			struct btrfs_root *root, struct inode *inode);
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/* super.c */
u64 btrfs_parse_size(char *str);
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int btrfs_parse_options(struct btrfs_root *root, char *options);
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Sage Weil 已提交
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int btrfs_sync_fs(struct super_block *sb, int wait);
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#endif