ctree.h 140.5 KB
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/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

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#ifndef __BTRFS_CTREE__
#define __BTRFS_CTREE__
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#include <linux/mm.h>
#include <linux/highmem.h>
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#include <linux/fs.h>
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#include <linux/rwsem.h>
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#include <linux/semaphore.h>
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#include <linux/completion.h>
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#include <linux/backing-dev.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/kobject.h>
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#include <trace/events/btrfs.h>
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#include <asm/kmap_types.h>
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#include <linux/pagemap.h>
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#include <linux/btrfs.h>
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#include <linux/workqueue.h>
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#include <linux/security.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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#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
#define STATIC noinline
#else
#define STATIC static noinline
#endif

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#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
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#define BTRFS_MAX_MIRRORS 3
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#define BTRFS_MAX_LEVEL 8
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#define BTRFS_COMPAT_EXTENT_TREE_V0

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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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/* holds quota configuration and tracking */
#define BTRFS_QUOTA_TREE_OBJECTID 8ULL

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/* for storing items that use the BTRFS_UUID_KEY* types */
#define BTRFS_UUID_TREE_OBJECTID 9ULL

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/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL

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

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

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/*
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 * All files have objectids in this range.
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 */
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#define BTRFS_FIRST_FREE_OBJECTID 256ULL
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#define BTRFS_LAST_FREE_OBJECTID -256ULL
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#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
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/*
 * the device items go into the chunk tree.  The key is in the form
 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
 */
#define BTRFS_DEV_ITEMS_OBJECTID 1ULL

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#define BTRFS_BTREE_INODE_OBJECTID 1

#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2

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#define BTRFS_DEV_REPLACE_DEVID 0ULL
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/*
 * the max metadata block size.  This limit is somewhat artificial,
 * but the memmove costs go through the roof for larger blocks.
 */
#define BTRFS_MAX_METADATA_BLOCKSIZE 65536

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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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/*
 * Theoretical limit is larger, but we keep this down to a sane
 * value. That should limit greatly the possibility of collisions on
 * inode ref items.
 */
#define BTRFS_LINK_MAX 65535U

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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

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static int btrfs_csum_sizes[] = { 4 };
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/* four bytes for CRC32 */
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#define BTRFS_EMPTY_DIR_SIZE 0
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/* spefic to btrfs_map_block(), therefore not in include/linux/blk_types.h */
#define REQ_GET_READ_MIRRORS	(1 << 30)

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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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/* ioprio of readahead is set to idle */
#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))

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#define BTRFS_DIRTY_METADATA_THRESH	(32 * 1024 * 1024)

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#define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)

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/*
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 * The key defines the order in the tree, and so it also defines (optimal)
 * block layout.
 *
 * objectid corresponds to the inode number.
 *
 * type tells us things about the object, and is a kind of stream selector.
 * so for a given inode, keys with type of 1 might refer to the inode data,
 * type of 2 may point to file data in the btree and type == 3 may point to
 * extents.
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 *
 * offset is the starting byte offset for this key in the stream.
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 *
 * btrfs_disk_key is in disk byte order.  struct btrfs_key is always
 * in cpu native order.  Otherwise they are identical and their sizes
 * should be the same (ie both packed)
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 */
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struct btrfs_disk_key {
	__le64 objectid;
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	u8 type;
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	__le64 offset;
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} __attribute__ ((__packed__));

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

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struct btrfs_mapping_tree {
	struct extent_map_tree map_tree;
};

struct btrfs_dev_item {
	/* the internal btrfs device id */
	__le64 devid;

	/* size of the device */
	__le64 total_bytes;

	/* bytes used */
	__le64 bytes_used;

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

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

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

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

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

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

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	/* grouping information for allocation decisions */
	__le32 dev_group;

	/* seek speed 0-100 where 100 is fastest */
	u8 seek_speed;

	/* bandwidth 0-100 where 100 is fastest */
	u8 bandwidth;

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

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

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

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

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

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

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

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

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#define BTRFS_FREE_SPACE_EXTENT	1
#define BTRFS_FREE_SPACE_BITMAP	2

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

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

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

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#define BTRFS_HEADER_FLAG_WRITTEN	(1ULL << 0)
#define BTRFS_HEADER_FLAG_RELOC		(1ULL << 1)
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/*
 * File system states
 */
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#define BTRFS_FS_STATE_ERROR		0
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#define BTRFS_FS_STATE_REMOUNTING	1
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#define BTRFS_FS_STATE_TRANS_ABORTED	2
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#define BTRFS_FS_STATE_DEV_REPLACING	3
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/* Super block flags */
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/* 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->nodesize))
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#define BTRFS_FILE_EXTENT_INLINE_DATA_START		\
		(offsetof(struct btrfs_file_extent_item, disk_bytenr))
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#define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
					sizeof(struct btrfs_item) - \
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					BTRFS_FILE_EXTENT_INLINE_DATA_START)
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#define BTRFS_MAX_XATTR_SIZE(r)	(BTRFS_LEAF_DATA_SIZE(r) - \
				 sizeof(struct btrfs_item) -\
				 sizeof(struct btrfs_dir_item))
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/*
 * this is a very generous portion of the super block, giving us
 * room to translate 14 chunks with 3 stripes each.
 */
#define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
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#define BTRFS_LABEL_SIZE 256
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/*
 * just in case we somehow lose the roots and are not able to mount,
 * we store an array of the roots from previous transactions
 * in the super.
 */
#define BTRFS_NUM_BACKUP_ROOTS 4
struct btrfs_root_backup {
	__le64 tree_root;
	__le64 tree_root_gen;

	__le64 chunk_root;
	__le64 chunk_root_gen;

	__le64 extent_root;
	__le64 extent_root_gen;

	__le64 fs_root;
	__le64 fs_root_gen;

	__le64 dev_root;
	__le64 dev_root_gen;

	__le64 csum_root;
	__le64 csum_root_gen;

	__le64 total_bytes;
	__le64 bytes_used;
	__le64 num_devices;
	/* future */
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	__le64 unused_64[4];
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	u8 tree_root_level;
	u8 chunk_root_level;
	u8 extent_root_level;
	u8 fs_root_level;
	u8 dev_root_level;
	u8 csum_root_level;
	/* future and to align */
	u8 unused_8[10];
} __attribute__ ((__packed__));

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/*
 * the super block basically lists the main trees of the FS
 * it currently lacks any block count etc etc
 */
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struct btrfs_super_block {
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	u8 csum[BTRFS_CSUM_SIZE];
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	/* the first 4 fields must match struct btrfs_header */
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	u8 fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
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	__le64 bytenr; /* this block number */
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	__le64 flags;
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	/* allowed to be different from the btrfs_header from here own down */
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	__le64 magic;
	__le64 generation;
	__le64 root;
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	__le64 chunk_root;
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	__le64 log_root;
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	/* this will help find the new super based on the log root */
	__le64 log_root_transid;
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	__le64 total_bytes;
	__le64 bytes_used;
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	__le64 root_dir_objectid;
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	__le64 num_devices;
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	__le32 sectorsize;
	__le32 nodesize;
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	__le32 __unused_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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	__le64 uuid_tree_generation;
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	/* future expansion */
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	__le64 reserved[30];
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	u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
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	struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
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} __attribute__ ((__packed__));

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/*
 * Compat flags that we support.  If any incompat flags are set other than the
 * ones specified below then we will fail to mount
 */
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#define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF	(1ULL << 0)
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#define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL	(1ULL << 1)
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#define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS	(1ULL << 2)
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#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO	(1ULL << 3)
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/*
 * some patches floated around with a second compression method
 * lets save that incompat here for when they do get in
 * Note we don't actually support it, we're just reserving the
 * number
 */
#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2	(1ULL << 4)

/*
 * older kernels tried to do bigger metadata blocks, but the
 * code was pretty buggy.  Lets not let them try anymore.
 */
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA	(1ULL << 5)
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#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF	(1ULL << 6)
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#define BTRFS_FEATURE_INCOMPAT_RAID56		(1ULL << 7)
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#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	(1ULL << 8)
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#define BTRFS_FEATURE_INCOMPAT_NO_HOLES		(1ULL << 9)
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#define BTRFS_FEATURE_COMPAT_SUPP		0ULL
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#define BTRFS_FEATURE_COMPAT_SAFE_SET		0ULL
#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR		0ULL
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#define BTRFS_FEATURE_COMPAT_RO_SUPP		0ULL
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#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET	0ULL
#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR	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 |		\
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	 BTRFS_FEATURE_INCOMPAT_BIG_METADATA |		\
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	 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO |		\
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	 BTRFS_FEATURE_INCOMPAT_RAID56 |		\
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	 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF |		\
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	 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA |	\
	 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
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#define BTRFS_FEATURE_INCOMPAT_SAFE_SET			\
	(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR		0ULL
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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];
596 597
	/* if there is real range locking, this locks field will change */
	int locks[BTRFS_MAX_LEVEL];
598
	int reada;
599
	/* keep some upper locks as we walk down */
600
	int lowest_level;
601 602 603 604 605

	/*
	 * set by btrfs_split_item, tells search_slot to keep all locks
	 * and to force calls to keep space in the nodes
	 */
606 607 608 609
	unsigned int search_for_split:1;
	unsigned int keep_locks:1;
	unsigned int skip_locking:1;
	unsigned int leave_spinning:1;
610
	unsigned int search_commit_root:1;
611
	unsigned int need_commit_sem:1;
612
	unsigned int skip_release_on_error:1;
613
};
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615 616 617 618
/*
 * items in the extent btree are used to record the objectid of the
 * owner of the block and the number of references
 */
619

620
struct btrfs_extent_item {
621 622 623 624 625 626
	__le64 refs;
	__le64 generation;
	__le64 flags;
} __attribute__ ((__packed__));

struct btrfs_extent_item_v0 {
627
	__le32 refs;
628 629
} __attribute__ ((__packed__));

630 631 632 633 634 635 636 637 638 639 640
#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
					sizeof(struct btrfs_item))

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

/* following flags only apply to tree blocks */

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

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

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

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

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

struct btrfs_extent_inline_ref {
	u8 type;
665
	__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;
673
	__le32 count;
674 675
} __attribute__ ((__packed__));

676

677 678
/* dev extents record free space on individual devices.  The owner
 * field points back to the chunk allocation mapping tree that allocated
679
 * the extent.  The chunk tree uuid field is a way to double check the owner
680 681
 */
struct btrfs_dev_extent {
682 683 684
	__le64 chunk_tree;
	__le64 chunk_objectid;
	__le64 chunk_offset;
685
	__le64 length;
686
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
687 688
} __attribute__ ((__packed__));

689
struct btrfs_inode_ref {
690
	__le64 index;
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	__le16 name_len;
	/* name goes here */
} __attribute__ ((__packed__));

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struct btrfs_inode_extref {
	__le64 parent_objectid;
	__le64 index;
	__le16 name_len;
	__u8   name[0];
	/* name goes here */
} __attribute__ ((__packed__));

703
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;
728
	__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;
753
	__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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/*
 * Internal in-memory flag that a subvolume has been marked for deletion but
 * still visible as a directory
 */
#define BTRFS_ROOT_SUBVOL_DEAD		(1ULL << 48)

765
struct btrfs_root_item {
766
	struct btrfs_inode_item inode;
767
	__le64 generation;
768
	__le64 root_dirid;
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	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
773
	__le64 flags;
774
	__le32 refs;
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	struct btrfs_disk_key drop_progress;
	u8 drop_level;
777
	u8 level;
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	/*
	 * The following fields appear after subvol_uuids+subvol_times
	 * were introduced.
	 */

	/*
	 * This generation number is used to test if the new fields are valid
	 * and up to date while reading the root item. Everytime the root item
	 * is written out, the "generation" field is copied into this field. If
	 * anyone ever mounted the fs with an older kernel, we will have
	 * mismatching generation values here and thus must invalidate the
	 * new fields. See btrfs_update_root and btrfs_find_last_root for
	 * details.
	 * the offset of generation_v2 is also used as the start for the memset
	 * when invalidating the fields.
	 */
	__le64 generation_v2;
	u8 uuid[BTRFS_UUID_SIZE];
	u8 parent_uuid[BTRFS_UUID_SIZE];
	u8 received_uuid[BTRFS_UUID_SIZE];
	__le64 ctransid; /* updated when an inode changes */
	__le64 otransid; /* trans when created */
	__le64 stransid; /* trans when sent. non-zero for received subvol */
	__le64 rtransid; /* trans when received. non-zero for received subvol */
	struct btrfs_timespec ctime;
	struct btrfs_timespec otime;
	struct btrfs_timespec stime;
	struct btrfs_timespec rtime;
	__le64 reserved[8]; /* for future */
808
} __attribute__ ((__packed__));
809

810 811 812 813 814 815 816 817 818
/*
 * 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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struct btrfs_disk_balance_args {
	/*
	 * profiles to operate on, single is denoted by
	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
	 */
	__le64 profiles;

	/* usage filter */
	__le64 usage;

	/* devid filter */
	__le64 devid;

	/* devid subset filter [pstart..pend) */
	__le64 pstart;
	__le64 pend;

	/* btrfs virtual address space subset filter [vstart..vend) */
	__le64 vstart;
	__le64 vend;

	/*
	 * profile to convert to, single is denoted by
	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
	 */
	__le64 target;

	/* BTRFS_BALANCE_ARGS_* */
	__le64 flags;

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	/* BTRFS_BALANCE_ARGS_LIMIT value */
	__le64 limit;

	__le64 unused[7];
853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869
} __attribute__ ((__packed__));

/*
 * store balance parameters to disk so that balance can be properly
 * resumed after crash or unmount
 */
struct btrfs_balance_item {
	/* BTRFS_BALANCE_* */
	__le64 flags;

	struct btrfs_disk_balance_args data;
	struct btrfs_disk_balance_args meta;
	struct btrfs_disk_balance_args sys;

	__le64 unused[4];
} __attribute__ ((__packed__));

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#define BTRFS_FILE_EXTENT_INLINE 0
#define BTRFS_FILE_EXTENT_REG 1
#define BTRFS_FILE_EXTENT_PREALLOC 2
873

874
struct btrfs_file_extent_item {
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	/*
	 * transaction id that created this extent
	 */
878
	__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? */
900
	u8 type;
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902 903 904
	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
905 906
	 *
	 * At this offset in the structure, the inline extent data start.
907
	 */
908 909
	__le64 disk_bytenr;
	__le64 disk_num_bytes;
910
	/*
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	 * the logical offset in file blocks (no csums)
912 913 914 915 916 917 918
	 * 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.
921
	 */
922
	__le64 num_bytes;
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924 925
} __attribute__ ((__packed__));

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struct btrfs_csum_item {
927
	u8 csum;
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} __attribute__ ((__packed__));

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struct btrfs_dev_stats_item {
	/*
	 * grow this item struct at the end for future enhancements and keep
	 * the existing values unchanged
	 */
	__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
} __attribute__ ((__packed__));

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#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS	0
#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID	1
#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED	0
#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED		1
#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED		2
#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED		3
#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED		4

struct btrfs_dev_replace {
	u64 replace_state;	/* see #define above */
	u64 time_started;	/* seconds since 1-Jan-1970 */
	u64 time_stopped;	/* seconds since 1-Jan-1970 */
	atomic64_t num_write_errors;
	atomic64_t num_uncorrectable_read_errors;

	u64 cursor_left;
	u64 committed_cursor_left;
	u64 cursor_left_last_write_of_item;
	u64 cursor_right;

	u64 cont_reading_from_srcdev_mode;	/* see #define above */

	int is_valid;
	int item_needs_writeback;
	struct btrfs_device *srcdev;
	struct btrfs_device *tgtdev;

	pid_t lock_owner;
	atomic_t nesting_level;
	struct mutex lock_finishing_cancel_unmount;
	struct mutex lock_management_lock;
	struct mutex lock;

	struct btrfs_scrub_progress scrub_progress;
};

974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990
struct btrfs_dev_replace_item {
	/*
	 * grow this item struct at the end for future enhancements and keep
	 * the existing values unchanged
	 */
	__le64 src_devid;
	__le64 cursor_left;
	__le64 cursor_right;
	__le64 cont_reading_from_srcdev_mode;

	__le64 replace_state;
	__le64 time_started;
	__le64 time_stopped;
	__le64 num_write_errors;
	__le64 num_uncorrectable_read_errors;
} __attribute__ ((__packed__));

991
/* different types of block groups (and chunks) */
992 993 994 995 996 997 998
#define BTRFS_BLOCK_GROUP_DATA		(1ULL << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM	(1ULL << 1)
#define BTRFS_BLOCK_GROUP_METADATA	(1ULL << 2)
#define BTRFS_BLOCK_GROUP_RAID0		(1ULL << 3)
#define BTRFS_BLOCK_GROUP_RAID1		(1ULL << 4)
#define BTRFS_BLOCK_GROUP_DUP		(1ULL << 5)
#define BTRFS_BLOCK_GROUP_RAID10	(1ULL << 6)
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#define BTRFS_BLOCK_GROUP_RAID5         (1ULL << 7)
#define BTRFS_BLOCK_GROUP_RAID6         (1ULL << 8)
1001 1002
#define BTRFS_BLOCK_GROUP_RESERVED	(BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
					 BTRFS_SPACE_INFO_GLOBAL_RSV)
1003 1004 1005 1006 1007 1008 1009

enum btrfs_raid_types {
	BTRFS_RAID_RAID10,
	BTRFS_RAID_RAID1,
	BTRFS_RAID_DUP,
	BTRFS_RAID_RAID0,
	BTRFS_RAID_SINGLE,
1010 1011
	BTRFS_RAID_RAID5,
	BTRFS_RAID_RAID6,
1012 1013
	BTRFS_NR_RAID_TYPES
};
1014 1015 1016 1017 1018 1019 1020

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

#define BTRFS_BLOCK_GROUP_PROFILE_MASK	(BTRFS_BLOCK_GROUP_RAID0 |   \
					 BTRFS_BLOCK_GROUP_RAID1 |   \
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					 BTRFS_BLOCK_GROUP_RAID5 |   \
					 BTRFS_BLOCK_GROUP_RAID6 |   \
1023 1024
					 BTRFS_BLOCK_GROUP_DUP |     \
					 BTRFS_BLOCK_GROUP_RAID10)
1025 1026 1027
#define BTRFS_BLOCK_GROUP_RAID56_MASK	(BTRFS_BLOCK_GROUP_RAID5 |   \
					 BTRFS_BLOCK_GROUP_RAID6)

1028 1029 1030 1031 1032 1033 1034 1035 1036
/*
 * We need a bit for restriper to be able to tell when chunks of type
 * SINGLE are available.  This "extended" profile format is used in
 * fs_info->avail_*_alloc_bits (in-memory) and balance item fields
 * (on-disk).  The corresponding on-disk bit in chunk.type is reserved
 * to avoid remappings between two formats in future.
 */
#define BTRFS_AVAIL_ALLOC_BIT_SINGLE	(1ULL << 48)

1037 1038 1039 1040 1041 1042
/*
 * A fake block group type that is used to communicate global block reserve
 * size to userspace via the SPACE_INFO ioctl.
 */
#define BTRFS_SPACE_INFO_GLOBAL_RSV	(1ULL << 49)

1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
#define BTRFS_EXTENDED_PROFILE_MASK	(BTRFS_BLOCK_GROUP_PROFILE_MASK | \
					 BTRFS_AVAIL_ALLOC_BIT_SINGLE)

static inline u64 chunk_to_extended(u64 flags)
{
	if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
		flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;

	return flags;
}
static inline u64 extended_to_chunk(u64 flags)
{
	return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
}

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struct btrfs_block_group_item {
	__le64 used;
1060 1061
	__le64 chunk_objectid;
	__le64 flags;
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} __attribute__ ((__packed__));

1064 1065 1066 1067 1068 1069
#define BTRFS_QGROUP_LEVEL_SHIFT		48
static inline u64 btrfs_qgroup_level(u64 qgroupid)
{
	return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
}

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/*
 * is subvolume quota turned on?
 */
#define BTRFS_QGROUP_STATUS_FLAG_ON		(1ULL << 0)
/*
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 * RESCAN is set during the initialization phase
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 */
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#define BTRFS_QGROUP_STATUS_FLAG_RESCAN		(1ULL << 1)
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/*
 * Some qgroup entries are known to be out of date,
 * either because the configuration has changed in a way that
 * makes a rescan necessary, or because the fs has been mounted
 * with a non-qgroup-aware version.
 * Turning qouta off and on again makes it inconsistent, too.
 */
#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT	(1ULL << 2)

#define BTRFS_QGROUP_STATUS_VERSION        1

struct btrfs_qgroup_status_item {
	__le64 version;
	/*
	 * the generation is updated during every commit. As older
	 * versions of btrfs are not aware of qgroups, it will be
	 * possible to detect inconsistencies by checking the
	 * generation on mount time
	 */
	__le64 generation;

	/* flag definitions see above */
	__le64 flags;

	/*
	 * only used during scanning to record the progress
	 * of the scan. It contains a logical address
	 */
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	__le64 rescan;
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} __attribute__ ((__packed__));

struct btrfs_qgroup_info_item {
	__le64 generation;
	__le64 rfer;
	__le64 rfer_cmpr;
	__le64 excl;
	__le64 excl_cmpr;
} __attribute__ ((__packed__));

/* flags definition for qgroup limits */
#define BTRFS_QGROUP_LIMIT_MAX_RFER	(1ULL << 0)
#define BTRFS_QGROUP_LIMIT_MAX_EXCL	(1ULL << 1)
#define BTRFS_QGROUP_LIMIT_RSV_RFER	(1ULL << 2)
#define BTRFS_QGROUP_LIMIT_RSV_EXCL	(1ULL << 3)
#define BTRFS_QGROUP_LIMIT_RFER_CMPR	(1ULL << 4)
#define BTRFS_QGROUP_LIMIT_EXCL_CMPR	(1ULL << 5)

struct btrfs_qgroup_limit_item {
	/*
	 * only updated when any of the other values change
	 */
	__le64 flags;
	__le64 max_rfer;
	__le64 max_excl;
	__le64 rsv_rfer;
	__le64 rsv_excl;
} __attribute__ ((__packed__));

1136 1137 1138 1139 1140 1141
/* For raid type sysfs entries */
struct raid_kobject {
	int raid_type;
	struct kobject kobj;
};

1142
struct btrfs_space_info {
1143
	spinlock_t lock;
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	u64 total_bytes;	/* total bytes in the space,
				   this doesn't take mirrors into account */
1147
	u64 bytes_used;		/* total bytes used,
1148
				   this doesn't take mirrors into account */
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	u64 bytes_pinned;	/* total bytes pinned, will be freed when the
				   transaction finishes */
	u64 bytes_reserved;	/* total bytes the allocator has reserved for
				   current allocations */
	u64 bytes_may_use;	/* number of bytes that may be used for
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				   delalloc/allocations */
1155 1156
	u64 bytes_readonly;	/* total bytes that are read only */

1157 1158 1159 1160
	u64 max_extent_size;	/* This will hold the maximum extent size of
				   the space info if we had an ENOSPC in the
				   allocator. */

1161 1162 1163 1164 1165 1166 1167 1168 1169
	unsigned int full:1;	/* indicates that we cannot allocate any more
				   chunks for this space */
	unsigned int chunk_alloc:1;	/* set if we are allocating a chunk */

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

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

1170
	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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1174 1175
	u64 flags;

1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187
	/*
	 * bytes_pinned is kept in line with what is actually pinned, as in
	 * we've called update_block_group and dropped the bytes_used counter
	 * and increased the bytes_pinned counter.  However this means that
	 * bytes_pinned does not reflect the bytes that will be pinned once the
	 * delayed refs are flushed, so this counter is inc'ed everytime we call
	 * btrfs_free_extent so it is a realtime count of what will be freed
	 * once the transaction is committed.  It will be zero'ed everytime the
	 * transaction commits.
	 */
	struct percpu_counter total_bytes_pinned;

1188
	struct list_head list;
1189
	/* Protected by the spinlock 'lock'. */
1190
	struct list_head ro_bgs;
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1192
	struct rw_semaphore groups_sem;
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	/* for block groups in our same type */
1194
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1195
	wait_queue_head_t wait;
1196 1197

	struct kobject kobj;
1198
	struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
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};

1201 1202 1203 1204 1205 1206 1207 1208
#define	BTRFS_BLOCK_RSV_GLOBAL		1
#define	BTRFS_BLOCK_RSV_DELALLOC	2
#define	BTRFS_BLOCK_RSV_TRANS		3
#define	BTRFS_BLOCK_RSV_CHUNK		4
#define	BTRFS_BLOCK_RSV_DELOPS		5
#define	BTRFS_BLOCK_RSV_EMPTY		6
#define	BTRFS_BLOCK_RSV_TEMP		7

1209 1210 1211 1212 1213
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	struct btrfs_space_info *space_info;
	spinlock_t lock;
1214 1215 1216
	unsigned short full;
	unsigned short type;
	unsigned short failfast;
1217 1218
};

1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
/*
 * 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;

1235 1236 1237
	/* We did a full search and couldn't create a cluster */
	bool fragmented;

1238 1239 1240 1241 1242 1243 1244
	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;
1245 1246
};

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enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
1250 1251
	BTRFS_CACHE_FAST	= 2,
	BTRFS_CACHE_FINISHED	= 3,
1252
	BTRFS_CACHE_ERROR	= 4,
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};

1255 1256 1257 1258 1259 1260 1261
enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN	= 0,
	BTRFS_DC_ERROR		= 1,
	BTRFS_DC_CLEAR		= 2,
	BTRFS_DC_SETUP		= 3,
};

1262 1263 1264 1265
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
1266
	struct btrfs_work work;
1267 1268 1269 1270 1271
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

1272 1273 1274 1275 1276
struct btrfs_io_ctl {
	void *cur, *orig;
	struct page *page;
	struct page **pages;
	struct btrfs_root *root;
1277
	struct inode *inode;
1278 1279 1280
	unsigned long size;
	int index;
	int num_pages;
1281 1282
	int entries;
	int bitmaps;
1283 1284 1285
	unsigned check_crcs:1;
};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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1289
	struct btrfs_fs_info *fs_info;
1290
	struct inode *inode;
1291
	spinlock_t lock;
1292
	u64 pinned;
1293
	u64 reserved;
1294
	u64 delalloc_bytes;
1295
	u64 bytes_super;
1296
	u64 flags;
1297
	u64 sectorsize;
1298
	u64 cache_generation;
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1300 1301 1302 1303 1304 1305 1306
	/*
	 * It is just used for the delayed data space allocation because
	 * only the data space allocation and the relative metadata update
	 * can be done cross the transaction.
	 */
	struct rw_semaphore data_rwsem;

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	/* for raid56, this is a full stripe, without parity */
	unsigned long full_stripe_len;

1310
	unsigned int ro;
1311
	unsigned int iref:1;
1312
	unsigned int has_caching_ctl:1;
1313
	unsigned int removed:1;
1314 1315

	int disk_cache_state;
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1317 1318
	/* cache tracking stuff */
	int cached;
1319 1320
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
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1321

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1322 1323 1324
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
1325
	struct btrfs_free_space_ctl *free_space_ctl;
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1326 1327 1328 1329 1330 1331

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

	/* for block groups in the same raid type */
	struct list_head list;
1332 1333 1334

	/* usage count */
	atomic_t count;
1335 1336 1337 1338 1339

	/* 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;
1340

1341 1342
	/* For delayed block group creation or deletion of empty block groups */
	struct list_head bg_list;
1343 1344 1345

	/* For read-only block groups */
	struct list_head ro_list;
1346 1347

	atomic_t trimming;
1348 1349 1350

	/* For dirty block groups */
	struct list_head dirty_list;
1351 1352 1353
	struct list_head io_list;

	struct btrfs_io_ctl io_ctl;
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};
1355

1356 1357 1358 1359 1360 1361
/* delayed seq elem */
struct seq_list {
	struct list_head list;
	u64 seq;
};

1362 1363
#define SEQ_LIST_INIT(name)	{ .list = LIST_HEAD_INIT((name).list), .seq = 0 }

1364 1365 1366 1367 1368
enum btrfs_orphan_cleanup_state {
	ORPHAN_CLEANUP_STARTED	= 1,
	ORPHAN_CLEANUP_DONE	= 2,
};

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/* used by the raid56 code to lock stripes for read/modify/write */
struct btrfs_stripe_hash {
	struct list_head hash_list;
	wait_queue_head_t wait;
	spinlock_t lock;
};

/* used by the raid56 code to lock stripes for read/modify/write */
struct btrfs_stripe_hash_table {
1378 1379 1380 1381
	struct list_head stripe_cache;
	spinlock_t cache_lock;
	int cache_size;
	struct btrfs_stripe_hash table[];
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};

#define BTRFS_STRIPE_HASH_TABLE_BITS 11

1386 1387
void btrfs_init_async_reclaim_work(struct work_struct *work);

1388
/* fs_info */
1389
struct reloc_control;
1390
struct btrfs_device;
1391
struct btrfs_fs_devices;
1392
struct btrfs_balance_control;
1393
struct btrfs_delayed_root;
1394
struct btrfs_fs_info {
1395
	u8 fsid[BTRFS_FSID_SIZE];
1396
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1397 1398
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
1399 1400
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
1401
	struct btrfs_root *fs_root;
1402
	struct btrfs_root *csum_root;
1403
	struct btrfs_root *quota_root;
1404
	struct btrfs_root *uuid_root;
1405 1406 1407

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
1408 1409

	spinlock_t fs_roots_radix_lock;
1410
	struct radix_tree_root fs_roots_radix;
1411

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	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
1414
	u64 first_logical_byte;
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1415 1416
	struct rb_root block_group_cache_tree;

1417 1418 1419 1420
	/* keep track of unallocated space */
	spinlock_t free_chunk_lock;
	u64 free_chunk_space;

1421 1422
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
1423

1424 1425 1426
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

1427 1428 1429 1430
	/*
	 * block reservation for extent, checksum, root tree and
	 * delayed dir index item
	 */
1431 1432 1433 1434 1435 1436 1437
	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;
1438 1439
	/* block reservation for delayed operations */
	struct btrfs_block_rsv delayed_block_rsv;
1440 1441 1442

	struct btrfs_block_rsv empty_block_rsv;

1443
	u64 generation;
1444
	u64 last_trans_committed;
1445
	u64 avg_delayed_ref_runtime;
1446 1447 1448 1449 1450 1451

	/*
	 * 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;
1452
	unsigned long mount_opt;
1453 1454 1455 1456 1457
	/*
	 * Track requests for actions that need to be done during transaction
	 * commit (like for some mount options).
	 */
	unsigned long pending_changes;
1458
	unsigned long compress_type:4;
1459
	int commit_interval;
1460 1461 1462 1463 1464 1465
	/*
	 * It is a suggestive number, the read side is safe even it gets a
	 * wrong number because we will write out the data into a regular
	 * extent. The write side(mount/remount) is under ->s_umount lock,
	 * so it is also safe.
	 */
1466
	u64 max_inline;
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	/*
	 * Protected by ->chunk_mutex and sb->s_umount.
	 *
	 * The reason that we use two lock to protect it is because only
	 * remount and mount operations can change it and these two operations
	 * are under sb->s_umount, but the read side (chunk allocation) can not
	 * acquire sb->s_umount or the deadlock would happen. So we use two
	 * locks to protect it. On the write side, we must acquire two locks,
	 * and on the read side, we just need acquire one of them.
	 */
1477
	u64 alloc_start;
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1478
	struct btrfs_transaction *running_transaction;
1479
	wait_queue_head_t transaction_throttle;
1480
	wait_queue_head_t transaction_wait;
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1481
	wait_queue_head_t transaction_blocked_wait;
1482
	wait_queue_head_t async_submit_wait;
1483

1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
	/*
	 * Used to protect the incompat_flags, compat_flags, compat_ro_flags
	 * when they are updated.
	 *
	 * Because we do not clear the flags for ever, so we needn't use
	 * the lock on the read side.
	 *
	 * We also needn't use the lock when we mount the fs, because
	 * there is no other task which will update the flag.
	 */
	spinlock_t super_lock;
1495 1496
	struct btrfs_super_block *super_copy;
	struct btrfs_super_block *super_for_commit;
1497
	struct block_device *__bdev;
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	struct super_block *sb;
1499
	struct inode *btree_inode;
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	struct backing_dev_info bdi;
1501
	struct mutex tree_log_mutex;
1502 1503
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
1504
	struct mutex chunk_mutex;
1505
	struct mutex volume_mutex;
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1507 1508 1509 1510 1511 1512
	/*
	 * this is taken to make sure we don't set block groups ro after
	 * the free space cache has been allocated on them
	 */
	struct mutex ro_block_group_mutex;

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1513 1514 1515 1516 1517 1518
	/* this is used during read/modify/write to make sure
	 * no two ios are trying to mod the same stripe at the same
	 * time
	 */
	struct btrfs_stripe_hash_table *stripe_hash_table;

1519 1520 1521 1522 1523 1524 1525 1526
	/*
	 * 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;
1527

1528
	struct rw_semaphore commit_root_sem;
1529

1530
	struct rw_semaphore cleanup_work_sem;
1531

1532
	struct rw_semaphore subvol_sem;
1533 1534
	struct srcu_struct subvol_srcu;

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1535
	spinlock_t trans_lock;
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1536 1537 1538 1539 1540 1541
	/*
	 * the reloc mutex goes with the trans lock, it is taken
	 * during commit to protect us from the relocation code
	 */
	struct mutex reloc_mutex;

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1542
	struct list_head trans_list;
1543
	struct list_head dead_roots;
1544
	struct list_head caching_block_groups;
1545

Y
Yan, Zheng 已提交
1546 1547
	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;
1548
	struct rw_semaphore delayed_iput_sem;
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Yan, Zheng 已提交
1549

J
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1550 1551
	/* this protects tree_mod_seq_list */
	spinlock_t tree_mod_seq_lock;
1552
	atomic64_t tree_mod_seq;
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1553 1554 1555 1556 1557 1558
	struct list_head tree_mod_seq_list;

	/* this protects tree_mod_log */
	rwlock_t tree_mod_log_lock;
	struct rb_root tree_mod_log;

1559
	atomic_t nr_async_submits;
1560
	atomic_t async_submit_draining;
1561
	atomic_t nr_async_bios;
1562
	atomic_t async_delalloc_pages;
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1563
	atomic_t open_ioctl_trans;
1564

1565
	/*
1566
	 * this is used to protect the following list -- ordered_roots.
1567
	 */
1568
	spinlock_t ordered_root_lock;
1569 1570

	/*
1571 1572 1573
	 * all fs/file tree roots in which there are data=ordered extents
	 * pending writeback are added into this list.
	 *
1574 1575 1576
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
1577
	struct list_head ordered_roots;
1578

1579
	struct mutex delalloc_root_mutex;
1580 1581 1582
	spinlock_t delalloc_root_lock;
	/* all fs/file tree roots that have delalloc inodes. */
	struct list_head delalloc_roots;
1583

1584 1585 1586 1587 1588 1589
	/*
	 * 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.
1590 1591 1592
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1593
	 */
1594 1595 1596 1597 1598 1599
	struct btrfs_workqueue *workers;
	struct btrfs_workqueue *delalloc_workers;
	struct btrfs_workqueue *flush_workers;
	struct btrfs_workqueue *endio_workers;
	struct btrfs_workqueue *endio_meta_workers;
	struct btrfs_workqueue *endio_raid56_workers;
1600
	struct btrfs_workqueue *endio_repair_workers;
1601 1602 1603 1604 1605 1606 1607
	struct btrfs_workqueue *rmw_workers;
	struct btrfs_workqueue *endio_meta_write_workers;
	struct btrfs_workqueue *endio_write_workers;
	struct btrfs_workqueue *endio_freespace_worker;
	struct btrfs_workqueue *submit_workers;
	struct btrfs_workqueue *caching_workers;
	struct btrfs_workqueue *readahead_workers;
1608

1609 1610 1611 1612 1613
	/*
	 * 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
	 */
1614 1615
	struct btrfs_workqueue *fixup_workers;
	struct btrfs_workqueue *delayed_workers;
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1616 1617 1618

	/* the extent workers do delayed refs on the extent allocation tree */
	struct btrfs_workqueue *extent_workers;
1619 1620
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1621
	int thread_pool_size;
1622

1623
	struct kobject *space_info_kobj;
1624
	int do_barriers;
1625
	int closing;
1626
	int log_root_recovering;
1627
	int open;
1628

1629
	u64 total_pinned;
1630

1631 1632
	/* used to keep from writing metadata until there is a nice batch */
	struct percpu_counter dirty_metadata_bytes;
1633
	struct percpu_counter delalloc_bytes;
1634
	s32 dirty_metadata_batch;
1635 1636
	s32 delalloc_batch;

1637 1638
	struct list_head dirty_cowonly_roots;

1639
	struct btrfs_fs_devices *fs_devices;
1640 1641 1642 1643 1644 1645

	/*
	 * 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.
	 */
1646
	struct list_head space_info;
1647

1648 1649
	struct btrfs_space_info *data_sinfo;

1650 1651
	struct reloc_control *reloc_ctl;

1652 1653 1654 1655 1656
	/* 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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1657

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1658 1659 1660 1661 1662
	/* auto defrag inodes go here */
	spinlock_t defrag_inodes_lock;
	struct rb_root defrag_inodes;
	atomic_t defrag_running;

1663 1664
	/* Used to protect avail_{data, metadata, system}_alloc_bits */
	seqlock_t profiles_lock;
1665 1666 1667 1668 1669
	/*
	 * these three are in extended format (availability of single
	 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
	 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits)
	 */
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1670 1671 1672
	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
1673

1674 1675 1676
	/* restriper state */
	spinlock_t balance_lock;
	struct mutex balance_mutex;
1677 1678
	atomic_t balance_running;
	atomic_t balance_pause_req;
1679
	atomic_t balance_cancel_req;
1680
	struct btrfs_balance_control *balance_ctl;
1681
	wait_queue_head_t balance_wait_q;
1682

1683 1684 1685
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1686
	void *bdev_holder;
L
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1687

A
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1688 1689 1690 1691 1692 1693 1694 1695
	/* private scrub information */
	struct mutex scrub_lock;
	atomic_t scrubs_running;
	atomic_t scrub_pause_req;
	atomic_t scrubs_paused;
	atomic_t scrub_cancel_req;
	wait_queue_head_t scrub_pause_wait;
	int scrub_workers_refcnt;
1696 1697 1698
	struct btrfs_workqueue *scrub_workers;
	struct btrfs_workqueue *scrub_wr_completion_workers;
	struct btrfs_workqueue *scrub_nocow_workers;
1699
	struct btrfs_workqueue *scrub_parity_workers;
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1700

1701 1702 1703
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
	u32 check_integrity_print_mask;
#endif
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719
	/*
	 * quota information
	 */
	unsigned int quota_enabled:1;

	/*
	 * quota_enabled only changes state after a commit. This holds the
	 * next state.
	 */
	unsigned int pending_quota_state:1;

	/* is qgroup tracking in a consistent state? */
	u64 qgroup_flags;

	/* holds configuration and tracking. Protected by qgroup_lock */
	struct rb_root qgroup_tree;
J
Josef Bacik 已提交
1720
	struct rb_root qgroup_op_tree;
1721
	spinlock_t qgroup_lock;
J
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1722 1723
	spinlock_t qgroup_op_lock;
	atomic_t qgroup_op_seq;
1724

1725 1726 1727 1728 1729 1730
	/*
	 * used to avoid frequently calling ulist_alloc()/ulist_free()
	 * when doing qgroup accounting, it must be protected by qgroup_lock.
	 */
	struct ulist *qgroup_ulist;

1731 1732 1733
	/* protect user change for quota operations */
	struct mutex qgroup_ioctl_lock;

1734 1735 1736
	/* list of dirty qgroups to be written at next commit */
	struct list_head dirty_qgroups;

1737
	/* used by qgroup for an efficient tree traversal */
1738
	u64 qgroup_seq;
1739

J
Jan Schmidt 已提交
1740 1741 1742
	/* qgroup rescan items */
	struct mutex qgroup_rescan_lock; /* protects the progress item */
	struct btrfs_key qgroup_rescan_progress;
1743
	struct btrfs_workqueue *qgroup_rescan_workers;
1744
	struct completion qgroup_rescan_completion;
1745
	struct btrfs_work qgroup_rescan_work;
J
Jan Schmidt 已提交
1746

L
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1747
	/* filesystem state */
1748
	unsigned long fs_state;
1749 1750

	struct btrfs_delayed_root *delayed_root;
C
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1751

1752 1753 1754
	/* readahead tree */
	spinlock_t reada_lock;
	struct radix_tree_root reada_tree;
1755

1756 1757 1758 1759
	/* Extent buffer radix tree */
	spinlock_t buffer_lock;
	struct radix_tree_root buffer_radix;

C
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1760 1761
	/* next backup root to be overwritten */
	int backup_root_index;
1762 1763

	int num_tolerated_disk_barrier_failures;
1764 1765 1766

	/* device replace state */
	struct btrfs_dev_replace dev_replace;
1767 1768

	atomic_t mutually_exclusive_operation_running;
S
Stefan Behrens 已提交
1769

1770 1771 1772
	struct percpu_counter bio_counter;
	wait_queue_head_t replace_wait;

S
Stefan Behrens 已提交
1773
	struct semaphore uuid_tree_rescan_sem;
1774
	unsigned int update_uuid_tree_gen:1;
1775 1776 1777

	/* Used to reclaim the metadata space in the background. */
	struct work_struct async_reclaim_work;
1778 1779 1780

	spinlock_t unused_bgs_lock;
	struct list_head unused_bgs;
1781
	struct mutex unused_bg_unpin_mutex;
1782
	struct mutex delete_unused_bgs_mutex;
1783 1784 1785

	/* For btrfs to record security options */
	struct security_mnt_opts security_opts;
1786 1787 1788 1789 1790 1791

	/*
	 * Chunks that can't be freed yet (under a trim/discard operation)
	 * and will be latter freed. Protected by fs_info->chunk_mutex.
	 */
	struct list_head pinned_chunks;
1792
};
1793

1794 1795 1796 1797 1798
struct btrfs_subvolume_writers {
	struct percpu_counter	counter;
	wait_queue_head_t	wait;
};

1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817
/*
 * The state of btrfs root
 */
/*
 * btrfs_record_root_in_trans is a multi-step process,
 * and it can race with the balancing code.   But the
 * race is very small, and only the first time the root
 * is added to each transaction.  So IN_TRANS_SETUP
 * is used to tell us when more checks are required
 */
#define BTRFS_ROOT_IN_TRANS_SETUP	0
#define BTRFS_ROOT_REF_COWS		1
#define BTRFS_ROOT_TRACK_DIRTY		2
#define BTRFS_ROOT_IN_RADIX		3
#define BTRFS_ROOT_DUMMY_ROOT		4
#define BTRFS_ROOT_ORPHAN_ITEM_INSERTED	5
#define BTRFS_ROOT_DEFRAG_RUNNING	6
#define BTRFS_ROOT_FORCE_COW		7
#define BTRFS_ROOT_MULTI_LOG_TASKS	8
1818
#define BTRFS_ROOT_DIRTY		9
1819

1820 1821
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1822
 * and for the extent tree extent_root root.
1823 1824
 */
struct btrfs_root {
1825
	struct extent_buffer *node;
1826

1827
	struct extent_buffer *commit_root;
1828
	struct btrfs_root *log_root;
Z
Zheng Yan 已提交
1829
	struct btrfs_root *reloc_root;
Y
Yan Zheng 已提交
1830

1831
	unsigned long state;
1832 1833
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1834
	struct btrfs_fs_info *fs_info;
1835 1836
	struct extent_io_tree dirty_log_pages;

1837
	struct mutex objectid_mutex;
Y
Yan Zheng 已提交
1838

1839 1840 1841
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1842 1843
	/* free ino cache stuff */
	struct btrfs_free_space_ctl *free_ino_ctl;
1844 1845 1846
	enum btrfs_caching_type ino_cache_state;
	spinlock_t ino_cache_lock;
	wait_queue_head_t ino_cache_wait;
1847
	struct btrfs_free_space_ctl *free_ino_pinned;
1848 1849
	u64 ino_cache_progress;
	struct inode *ino_cache_inode;
1850

1851
	struct mutex log_mutex;
Y
Yan Zheng 已提交
1852 1853
	wait_queue_head_t log_writer_wait;
	wait_queue_head_t log_commit_wait[2];
1854
	struct list_head log_ctxs[2];
Y
Yan Zheng 已提交
1855 1856
	atomic_t log_writers;
	atomic_t log_commit[2];
M
Miao Xie 已提交
1857
	atomic_t log_batch;
1858
	int log_transid;
1859 1860 1861
	/* No matter the commit succeeds or not*/
	int log_transid_committed;
	/* Just be updated when the commit succeeds. */
1862
	int last_log_commit;
1863
	pid_t log_start_pid;
1864

1865 1866
	u64 objectid;
	u64 last_trans;
1867 1868 1869 1870 1871 1872 1873

	/* data allocations are done in sectorsize units */
	u32 sectorsize;

	/* node allocations are done in nodesize units */
	u32 nodesize;

1874 1875
	u32 stripesize;

1876
	u32 type;
1877 1878

	u64 highest_objectid;
C
Chris Mason 已提交
1879

1880
	/* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1881 1882
	u64 alloc_bytenr;

1883
	u64 defrag_trans_start;
1884
	struct btrfs_key defrag_progress;
C
Chris Mason 已提交
1885
	struct btrfs_key defrag_max;
1886
	char *name;
1887 1888 1889

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1890

1891 1892
	struct list_head root_list;

1893 1894 1895
	spinlock_t log_extents_lock[2];
	struct list_head logged_list[2];

1896
	spinlock_t orphan_lock;
1897
	atomic_t orphan_inodes;
1898 1899
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_cleanup_state;
1900

1901 1902 1903 1904
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1905 1906 1907 1908 1909
	/*
	 * radix tree that keeps track of delayed nodes of every inode,
	 * protected by inode_lock
	 */
	struct radix_tree_root delayed_nodes_tree;
1910 1911 1912 1913
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
1914
	dev_t anon_dev;
1915

1916
	spinlock_t root_item_lock;
1917
	atomic_t refs;
1918

1919
	struct mutex delalloc_mutex;
1920 1921 1922 1923 1924 1925 1926 1927 1928
	spinlock_t delalloc_lock;
	/*
	 * all of the inodes that have delalloc bytes.  It is possible for
	 * this list to be empty even when there is still dirty data=ordered
	 * extents waiting to finish IO.
	 */
	struct list_head delalloc_inodes;
	struct list_head delalloc_root;
	u64 nr_delalloc_inodes;
1929 1930

	struct mutex ordered_extent_mutex;
1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944
	/*
	 * this is used by the balancing code to wait for all the pending
	 * ordered extents
	 */
	spinlock_t ordered_extent_lock;

	/*
	 * all of the data=ordered extents pending writeback
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
	struct list_head ordered_extents;
	struct list_head ordered_root;
	u64 nr_ordered_extents;
1945 1946 1947 1948 1949 1950

	/*
	 * Number of currently running SEND ioctls to prevent
	 * manipulation with the read-only status via SUBVOL_SETFLAGS
	 */
	int send_in_progress;
1951 1952
	struct btrfs_subvolume_writers *subv_writers;
	atomic_t will_be_snapshoted;
1953 1954 1955

	/* For qgroup metadata space reserve */
	atomic_t qgroup_meta_rsv;
1956 1957
};

C
Chris Mason 已提交
1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989
struct btrfs_ioctl_defrag_range_args {
	/* start of the defrag operation */
	__u64 start;

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

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

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

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

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


C
Chris Mason 已提交
1990 1991 1992 1993 1994
/*
 * 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
 */
C
Chris Mason 已提交
1995
#define BTRFS_INODE_ITEM_KEY		1
1996
#define BTRFS_INODE_REF_KEY		12
M
Mark Fasheh 已提交
1997
#define BTRFS_INODE_EXTREF_KEY		13
1998 1999
#define BTRFS_XATTR_ITEM_KEY		24
#define BTRFS_ORPHAN_ITEM_KEY		48
C
Chris Mason 已提交
2000
/* reserve 2-15 close to the inode for later flexibility */
C
Chris Mason 已提交
2001 2002 2003 2004 2005

/*
 * dir items are the name -> inode pointers in a directory.  There is one
 * for every name in a directory.
 */
2006 2007 2008 2009
#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
C
Chris Mason 已提交
2010
/*
C
Chris Mason 已提交
2011
 * extent data is for file data
C
Chris Mason 已提交
2012
 */
2013
#define BTRFS_EXTENT_DATA_KEY	108
2014

C
Chris Mason 已提交
2015
/*
2016 2017
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
C
Chris Mason 已提交
2018
 */
2019
#define BTRFS_EXTENT_CSUM_KEY	128
C
Chris Mason 已提交
2020

C
Chris Mason 已提交
2021
/*
W
Wu Fengguang 已提交
2022
 * root items point to tree roots.  They are typically in the root
C
Chris Mason 已提交
2023 2024
 * tree used by the super block to find all the other trees
 */
2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
#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

C
Chris Mason 已提交
2040 2041 2042 2043
/*
 * extent items are in the extent map tree.  These record which blocks
 * are used, and how many references there are to each block
 */
2044
#define BTRFS_EXTENT_ITEM_KEY	168
2045

2046 2047 2048 2049 2050 2051
/*
 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
 * the length, so we save the level in key->offset instead of the length.
 */
#define BTRFS_METADATA_ITEM_KEY	169

2052 2053 2054 2055 2056 2057 2058 2059 2060
#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
C
Chris Mason 已提交
2061 2062 2063 2064 2065

/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
2066
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2067

2068 2069 2070
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
2071

A
Arne Jansen 已提交
2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
/*
 * Records the overall state of the qgroups.
 * There's only one instance of this key present,
 * (0, BTRFS_QGROUP_STATUS_KEY, 0)
 */
#define BTRFS_QGROUP_STATUS_KEY         240
/*
 * Records the currently used space of the qgroup.
 * One key per qgroup, (0, BTRFS_QGROUP_INFO_KEY, qgroupid).
 */
#define BTRFS_QGROUP_INFO_KEY           242
/*
 * Contains the user configured limits for the qgroup.
 * One key per qgroup, (0, BTRFS_QGROUP_LIMIT_KEY, qgroupid).
 */
#define BTRFS_QGROUP_LIMIT_KEY          244
/*
 * Records the child-parent relationship of qgroups. For
 * each relation, 2 keys are present:
 * (childid, BTRFS_QGROUP_RELATION_KEY, parentid)
 * (parentid, BTRFS_QGROUP_RELATION_KEY, childid)
 */
#define BTRFS_QGROUP_RELATION_KEY       246

2096 2097
#define BTRFS_BALANCE_ITEM_KEY	248

2098 2099 2100 2101 2102 2103
/*
 * Persistantly stores the io stats in the device tree.
 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
 */
#define BTRFS_DEV_STATS_KEY	249

2104 2105 2106 2107 2108 2109
/*
 * Persistantly stores the device replace state in the device tree.
 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
 */
#define BTRFS_DEV_REPLACE_KEY	250

2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122
/*
 * Stores items that allow to quickly map UUIDs to something else.
 * These items are part of the filesystem UUID tree.
 * The key is built like this:
 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
 */
#if BTRFS_UUID_SIZE != 16
#error "UUID items require BTRFS_UUID_SIZE == 16!"
#endif
#define BTRFS_UUID_KEY_SUBVOL	251	/* for UUIDs assigned to subvols */
#define BTRFS_UUID_KEY_RECEIVED_SUBVOL	252	/* for UUIDs assigned to
						 * received subvols */

C
Chris Mason 已提交
2123 2124 2125 2126
/*
 * string items are for debugging.  They just store a short string of
 * data in the FS
 */
C
Chris Mason 已提交
2127 2128
#define BTRFS_STRING_ITEM_KEY	253

2129 2130 2131 2132 2133
/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */
2134 2135 2136
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
2137
#define BTRFS_MOUNT_SSD			(1 << 3)
2138
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
C
Chris Mason 已提交
2139
#define BTRFS_MOUNT_COMPRESS		(1 << 5)
S
Sage Weil 已提交
2140
#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
2141
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
2142
#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
C
Chris Mason 已提交
2143
#define BTRFS_MOUNT_NOSSD		(1 << 9)
C
Christoph Hellwig 已提交
2144
#define BTRFS_MOUNT_DISCARD		(1 << 10)
C
Chris Mason 已提交
2145
#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
2146
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
2147
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
2148
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2149
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
C
Chris Mason 已提交
2150
#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
C
Chris Mason 已提交
2151
#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
C
Chris Mason 已提交
2152
#define BTRFS_MOUNT_RECOVERY		(1 << 18)
2153
#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)
2154 2155
#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
J
Jeff Mahoney 已提交
2156
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)
2157
#define BTRFS_MOUNT_RESCAN_UUID_TREE	(1 << 23)
2158 2159
#define BTRFS_MOUNT_FRAGMENT_DATA	(1 << 24)
#define BTRFS_MOUNT_FRAGMENT_METADATA	(1 << 25)
2160

2161
#define BTRFS_DEFAULT_COMMIT_INTERVAL	(30)
2162
#define BTRFS_DEFAULT_MAX_INLINE	(8192)
2163

2164 2165
#define btrfs_clear_opt(o, opt)		((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt)		((o) |= BTRFS_MOUNT_##opt)
M
Miao Xie 已提交
2166
#define btrfs_raw_test_opt(o, opt)	((o) & BTRFS_MOUNT_##opt)
2167 2168
#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
					 BTRFS_MOUNT_##opt)
2169

2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183
#define btrfs_set_and_info(root, opt, fmt, args...)			\
{									\
	if (!btrfs_test_opt(root, opt))					\
		btrfs_info(root->fs_info, fmt, ##args);			\
	btrfs_set_opt(root->fs_info->mount_opt, opt);			\
}

#define btrfs_clear_and_info(root, opt, fmt, args...)			\
{									\
	if (btrfs_test_opt(root, opt))					\
		btrfs_info(root->fs_info, fmt, ##args);			\
	btrfs_clear_opt(root->fs_info->mount_opt, opt);			\
}

2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
#ifdef CONFIG_BTRFS_DEBUG
static inline int
btrfs_should_fragment_free_space(struct btrfs_root *root,
				 struct btrfs_block_group_cache *block_group)
{
	return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
	       (btrfs_test_opt(root, FRAGMENT_DATA) &&
		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
}
#endif

2196 2197 2198 2199 2200 2201 2202 2203
/*
 * Requests for changes that need to be done during transaction commit.
 *
 * Internal mount options that are used for special handling of the real
 * mount options (eg. cannot be set during remount and have to be set during
 * transaction commit)
 */

2204 2205
#define BTRFS_PENDING_SET_INODE_MAP_CACHE	(0)
#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE	(1)
2206
#define BTRFS_PENDING_COMMIT			(2)
2207

2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238
#define btrfs_test_pending(info, opt)	\
	test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
#define btrfs_set_pending(info, opt)	\
	set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)
#define btrfs_clear_pending(info, opt)	\
	clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes)

/*
 * Helpers for setting pending mount option changes.
 *
 * Expects corresponding macros
 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name
 */
#define btrfs_set_pending_and_info(info, opt, fmt, args...)            \
do {                                                                   \
       if (!btrfs_raw_test_opt((info)->mount_opt, opt)) {              \
               btrfs_info((info), fmt, ##args);                        \
               btrfs_set_pending((info), SET_##opt);                   \
               btrfs_clear_pending((info), CLEAR_##opt);               \
       }                                                               \
} while(0)

#define btrfs_clear_pending_and_info(info, opt, fmt, args...)          \
do {                                                                   \
       if (btrfs_raw_test_opt((info)->mount_opt, opt)) {               \
               btrfs_info((info), fmt, ##args);                        \
               btrfs_set_pending((info), CLEAR_##opt);                 \
               btrfs_clear_pending((info), SET_##opt);                 \
       }                                                               \
} while(0)

Y
Yan 已提交
2239 2240 2241
/*
 * Inode flags
 */
Y
Yan 已提交
2242 2243 2244
#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
C
Chris Mason 已提交
2245
#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
Y
Yan Zheng 已提交
2246
#define BTRFS_INODE_PREALLOC		(1 << 4)
2247 2248 2249 2250 2251 2252
#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)
2253
#define BTRFS_INODE_COMPRESS		(1 << 11)
2254

2255 2256
#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

2257 2258 2259 2260 2261 2262 2263 2264
struct btrfs_map_token {
	struct extent_buffer *eb;
	char *kaddr;
	unsigned long offset;
};

static inline void btrfs_init_map_token (struct btrfs_map_token *token)
{
J
Josef Bacik 已提交
2265
	token->kaddr = NULL;
2266 2267
}

2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287
/* 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)))

L
Li Zefan 已提交
2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310
#define DECLARE_BTRFS_SETGET_BITS(bits)					\
u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr,	\
			       unsigned long off,			\
                              struct btrfs_map_token *token);		\
void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr,	\
			    unsigned long off, u##bits val,		\
			    struct btrfs_map_token *token);		\
static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \
				       unsigned long off)		\
{									\
	return btrfs_get_token_##bits(eb, ptr, off, NULL);		\
}									\
static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \
				    unsigned long off, u##bits val)	\
{									\
       btrfs_set_token_##bits(eb, ptr, off, val, NULL);			\
}

DECLARE_BTRFS_SETGET_BITS(8)
DECLARE_BTRFS_SETGET_BITS(16)
DECLARE_BTRFS_SETGET_BITS(32)
DECLARE_BTRFS_SETGET_BITS(64)

2311
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
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Li Zefan 已提交
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static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	return btrfs_get_##bits(eb, s, offsetof(type, member));		\
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb, type *s,	\
				    u##bits val)			\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	btrfs_set_##bits(eb, s, offsetof(type, member), val);		\
}									\
static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \
					 struct btrfs_map_token *token)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \
}									\
static inline void btrfs_set_token_##name(struct extent_buffer *eb,	\
					  type *s, u##bits val,		\
                                         struct btrfs_map_token *token)	\
{									\
	BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member);	\
	btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \
}
2336 2337 2338 2339

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
2340
	type *p = page_address(eb->pages[0]);				\
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	u##bits res = le##bits##_to_cpu(p->member);			\
2342
	return res;							\
2343 2344 2345 2346
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
2347
	type *p = page_address(eb->pages[0]);				\
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	p->member = cpu_to_le##bits(val);				\
2349
}
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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);
2368 2369
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2370 2371 2372
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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Yan Zheng 已提交
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BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2374

2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386
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);
2387 2388 2389 2390 2391 2392
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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Yan Zheng 已提交
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BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);
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2396
static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2397
{
2398
	return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2399 2400
}

2401
static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
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Yan Zheng 已提交
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{
2403
	return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
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Yan Zheng 已提交
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}

2406
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2407 2408 2409 2410 2411 2412 2413
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);
2415 2416 2417
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

2418 2419 2420 2421 2422 2423
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);
2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435
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);
2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449
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;
}

2450 2451 2452 2453 2454
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466
static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
					 struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
}

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

2467 2468 2469 2470 2471
/* 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);
2472 2473
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
2474 2475

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2476 2477 2478 2479 2480
		   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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2482 2483
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2484
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2485

M
Mark Fasheh 已提交
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/* struct btrfs_inode_extref */
BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
		   parent_objectid, 64);
BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
		   name_len, 16);
BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);

2493 2494
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2495
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2496
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2497
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2498
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2499 2500 2501 2502 2503
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);
2504
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2505
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522
BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
			 sequence, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
			 transid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item,
			 nbytes, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
			 block_group, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
2523 2524
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2525 2526
BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
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Chris Mason 已提交
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2528
/* struct btrfs_dev_extent */
2529 2530 2531 2532 2533 2534
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);
2535 2536
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

2537
static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2538 2539
{
	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2540
	return (unsigned long)dev + ptr;
2541 2542
}

2543 2544 2545 2546
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);
2547

2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);


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

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

static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
					    struct btrfs_tree_block_info *item,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
C
Chris Mason 已提交
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2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603
BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
		   root, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
		   objectid, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
		   offset, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
		   count, 32);

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

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

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

BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
		   generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
C
Chris Mason 已提交
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2605 2606
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2607
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2608 2609 2610 2611
BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr,
			 blockptr, 64);
BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
			 generation, 64);
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Chris Mason 已提交
2612

2613
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2614
{
2615 2616 2617 2618
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
C
Chris Mason 已提交
2619 2620
}

2621 2622
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
Chris Mason 已提交
2623
{
2624 2625 2626 2627
	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
2628 2629
}

2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646
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);
}

2647
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2648
{
2649 2650
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
2651 2652
}

2653 2654 2655
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

2656 2657
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
2658
{
2659 2660 2661 2662
	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);
2663 2664
}

2665 2666 2667
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2668 2669
BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2670

2671
static inline unsigned long btrfs_item_nr_offset(int nr)
2672
{
2673 2674
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
2675 2676
}

2677
static inline struct btrfs_item *btrfs_item_nr(int nr)
C
Chris Mason 已提交
2678
{
2679
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
Chris Mason 已提交
2680 2681
}

2682 2683
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
Chris Mason 已提交
2684
{
2685
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
Chris Mason 已提交
2686 2687
}

2688
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2689
{
2690
	return btrfs_item_end(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2691 2692
}

2693
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2694
{
2695
	return btrfs_item_offset(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2696 2697
}

2698
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2699
{
2700
	return btrfs_item_size(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2701 2702
}

2703 2704
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
2705
{
2706
	struct btrfs_item *item = btrfs_item_nr(nr);
2707
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2708 2709
}

2710 2711
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
2712
{
2713
	struct btrfs_item *item = btrfs_item_nr(nr);
2714
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2715 2716
}

2717 2718
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

2719 2720 2721 2722 2723 2724 2725
/*
 * 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);

2726
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
2727
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2728 2729
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2730
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2731 2732 2733 2734 2735 2736 2737
BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item,
			 data_len, 16);
BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item,
			 name_len, 16);
BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item,
			 transid, 64);
2738

2739 2740 2741
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
2742
{
2743
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2744 2745
}

2746 2747 2748
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
2749
{
2750
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2751 2752
}

2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773
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);
}

2774 2775 2776 2777 2778
/* 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);
2779

C
Chris Mason 已提交
2780 2781 2782 2783
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
2784
	cpu->type = disk->type;
C
Chris Mason 已提交
2785 2786 2787 2788 2789 2790 2791
	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);
2792
	disk->type = cpu->type;
C
Chris Mason 已提交
2793 2794 2795
	disk->objectid = cpu_to_le64(cpu->objectid);
}

2796 2797
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2798
{
2799 2800 2801
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2802 2803
}

2804 2805
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2806
{
2807 2808 2809
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2810 2811
}

2812 2813 2814
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
2815
{
2816 2817 2818
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
2819 2820
}

2821

2822
static inline u8 btrfs_key_type(struct btrfs_key *key)
2823
{
2824
	return key->type;
2825 2826
}

2827
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2828
{
2829
	key->type = val;
2830 2831
}

2832
/* struct btrfs_header */
2833
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2834 2835 2836 2837
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);
2838
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2839
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2840 2841 2842 2843 2844 2845
BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header,
			 nritems, 32);
BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2846

2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865
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;
}

2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880
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);
}

2881
static inline unsigned long btrfs_header_fsid(void)
2882
{
2883
	return offsetof(struct btrfs_header, fsid);
2884 2885
}

2886
static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2887
{
2888
	return offsetof(struct btrfs_header, chunk_tree_uuid);
2889 2890
}

2891
static inline int btrfs_is_leaf(struct extent_buffer *eb)
2892
{
C
Chris Mason 已提交
2893
	return btrfs_header_level(eb) == 0;
2894 2895
}

2896
/* struct btrfs_root_item */
2897 2898
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
2899
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2900 2901
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2902

2903 2904
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
2905 2906
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2907 2908
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);
2909
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2910 2911
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
2912 2913
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
2914 2915 2916 2917 2918 2919 2920 2921 2922 2923
BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
			 generation_v2, 64);
BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
			 ctransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
			 otransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
			 stransid, 64);
BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
			 rtransid, 64);
C
Chris Mason 已提交
2924

L
Li Zefan 已提交
2925 2926
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
2927
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
L
Li Zefan 已提交
2928 2929
}

2930 2931 2932 2933 2934
static inline bool btrfs_root_dead(struct btrfs_root *root)
{
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
}

C
Chris Mason 已提交
2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983
/* struct btrfs_root_backup */
BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
		   tree_root, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
		   tree_root_gen, 64);
BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
		   tree_root_level, 8);

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

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

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

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

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

2984 2985
/* struct btrfs_balance_item */
BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2986

2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043
static inline void btrfs_balance_data(struct extent_buffer *eb,
				      struct btrfs_balance_item *bi,
				      struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
}

static inline void btrfs_set_balance_data(struct extent_buffer *eb,
					  struct btrfs_balance_item *bi,
					  struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
}

static inline void btrfs_balance_meta(struct extent_buffer *eb,
				      struct btrfs_balance_item *bi,
				      struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
}

static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
					  struct btrfs_balance_item *bi,
					  struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
}

static inline void btrfs_balance_sys(struct extent_buffer *eb,
				     struct btrfs_balance_item *bi,
				     struct btrfs_disk_balance_args *ba)
{
	read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
}

static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
					 struct btrfs_balance_item *bi,
					 struct btrfs_disk_balance_args *ba)
{
	write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
}

static inline void
btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
			       struct btrfs_disk_balance_args *disk)
{
	memset(cpu, 0, sizeof(*cpu));

	cpu->profiles = le64_to_cpu(disk->profiles);
	cpu->usage = le64_to_cpu(disk->usage);
	cpu->devid = le64_to_cpu(disk->devid);
	cpu->pstart = le64_to_cpu(disk->pstart);
	cpu->pend = le64_to_cpu(disk->pend);
	cpu->vstart = le64_to_cpu(disk->vstart);
	cpu->vend = le64_to_cpu(disk->vend);
	cpu->target = le64_to_cpu(disk->target);
	cpu->flags = le64_to_cpu(disk->flags);
3044
	cpu->limit = le64_to_cpu(disk->limit);
3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061
}

static inline void
btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk,
			       struct btrfs_balance_args *cpu)
{
	memset(disk, 0, sizeof(*disk));

	disk->profiles = cpu_to_le64(cpu->profiles);
	disk->usage = cpu_to_le64(cpu->usage);
	disk->devid = cpu_to_le64(cpu->devid);
	disk->pstart = cpu_to_le64(cpu->pstart);
	disk->pend = cpu_to_le64(cpu->pend);
	disk->vstart = cpu_to_le64(cpu->vstart);
	disk->vend = cpu_to_le64(cpu->vend);
	disk->target = cpu_to_le64(cpu->target);
	disk->flags = cpu_to_le64(cpu->flags);
3062
	disk->limit = cpu_to_le64(cpu->limit);
3063 3064 3065
}

/* struct btrfs_super_block */
3066
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3067
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3068 3069 3070
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3071 3072
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
3073 3074
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
3075 3076
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
3077 3078 3079
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,
3080 3081 3082
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
3083 3084
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
3085 3086
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
3087 3088 3089 3090
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);
3091 3092 3093 3094
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
			 sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
			 nodesize, 32);
3095 3096
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
3097 3098
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
3099 3100
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
3101 3102 3103
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,
3104
			 compat_ro_flags, 64);
3105 3106
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
3107 3108
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
3109 3110
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
3111
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3112 3113
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
			 uuid_tree_generation, 64);
3114 3115 3116

static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
D
David Sterba 已提交
3117 3118 3119 3120
	u16 t = btrfs_super_csum_type(s);
	/*
	 * csum type is validated at mount time
	 */
3121 3122
	return btrfs_csum_sizes[t];
}
3123

3124
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3125
{
3126
	return offsetof(struct btrfs_leaf, items);
3127 3128
}

3129 3130
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3131 3132 3133 3134 3135 3136 3137 3138
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
			 struct btrfs_file_extent_item, disk_bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
			 struct btrfs_file_extent_item, offset, 64);
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
			 struct btrfs_file_extent_item, generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
			 struct btrfs_file_extent_item, num_bytes, 64);
3139 3140 3141 3142
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
			 struct btrfs_file_extent_item, disk_num_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
			 struct btrfs_file_extent_item, compression, 8);
3143

C
Chris Mason 已提交
3144 3145
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3146
{
3147
	return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3148 3149 3150 3151
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
3152
	return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3153 3154
}

3155 3156
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
3157 3158
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
3159 3160
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
3161 3162
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
3163 3164
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181
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 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)
{
3182
	return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
C
Chris Mason 已提交
3183
}
3184

3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210
/* 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,
					       int slot,
					       struct btrfs_file_extent_item *fi)
{
	struct btrfs_map_token token;

	btrfs_init_map_token(&token);
	/*
	 * return the space used on disk if this item isn't
	 * compressed or encoded
	 */
	if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 &&
	    btrfs_token_file_extent_encryption(eb, fi, &token) == 0 &&
	    btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) {
		return btrfs_file_extent_inline_item_len(eb,
							 btrfs_item_nr(slot));
	}

	/* otherwise use the ram bytes field */
	return btrfs_token_file_extent_ram_bytes(eb, fi, &token);
}


3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234
/* btrfs_dev_stats_item */
static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb,
					struct btrfs_dev_stats_item *ptr,
					int index)
{
	u64 val;

	read_extent_buffer(eb, &val,
			   offsetof(struct btrfs_dev_stats_item, values) +
			    ((unsigned long)ptr) + (index * sizeof(u64)),
			   sizeof(val));
	return val;
}

static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb,
					     struct btrfs_dev_stats_item *ptr,
					     int index, u64 val)
{
	write_extent_buffer(eb, &val,
			    offsetof(struct btrfs_dev_stats_item, values) +
			     ((unsigned long)ptr) + (index * sizeof(u64)),
			    sizeof(val));
}

A
Arne Jansen 已提交
3235 3236 3237 3238 3239 3240 3241
/* btrfs_qgroup_status_item */
BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
		   version, 64);
BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
		   flags, 64);
J
Jan Schmidt 已提交
3242 3243
BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
		   rescan, 64);
A
Arne Jansen 已提交
3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277

/* btrfs_qgroup_info_item */
BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
		   rfer_cmpr, 64);
BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
		   excl_cmpr, 64);

BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
			 struct btrfs_qgroup_info_item, generation, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
			 rfer, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
			 struct btrfs_qgroup_info_item, rfer_cmpr, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
			 excl, 64);
BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
			 struct btrfs_qgroup_info_item, excl_cmpr, 64);

/* btrfs_qgroup_limit_item */
BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
		   flags, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
		   max_rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
		   max_excl, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
		   rsv_rfer, 64);
BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
		   rsv_excl, 64);

3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320
/* btrfs_dev_replace_item */
BTRFS_SETGET_FUNCS(dev_replace_src_devid,
		   struct btrfs_dev_replace_item, src_devid, 64);
BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
		   struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
		   64);
BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
		   replace_state, 64);
BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
		   time_started, 64);
BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
		   time_stopped, 64);
BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
		   num_write_errors, 64);
BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
		   struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
		   64);
BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
		   cursor_left, 64);
BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
		   cursor_right, 64);

BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
			 struct btrfs_dev_replace_item, src_devid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
			 struct btrfs_dev_replace_item,
			 cont_reading_from_srcdev_mode, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
			 struct btrfs_dev_replace_item, replace_state, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
			 struct btrfs_dev_replace_item, time_started, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
			 struct btrfs_dev_replace_item, time_stopped, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
			 struct btrfs_dev_replace_item, num_write_errors, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
			 struct btrfs_dev_replace_item,
			 num_uncorrectable_read_errors, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
			 struct btrfs_dev_replace_item, cursor_left, 64);
BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
			 struct btrfs_dev_replace_item, cursor_right, 64);

3321
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
C
Chris Mason 已提交
3322 3323 3324 3325
{
	return sb->s_fs_info;
}

3326 3327
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
3328
	((type *)(btrfs_leaf_data(leaf) + \
3329 3330 3331 3332 3333
	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)))
3334

3335 3336 3337 3338 3339 3340
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));
}

3341 3342 3343 3344 3345
static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
	return mapping_gfp_mask(mapping) & ~__GFP_FS;
}

C
Chris Mason 已提交
3346
/* extent-tree.c */
3347 3348 3349

u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);

3350
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3351
						 unsigned num_items)
3352
{
3353
	return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3354
		2 * num_items;
3355 3356 3357 3358 3359 3360 3361 3362 3363
}

/*
 * Doing a truncate won't result in new nodes or leaves, just what we need for
 * COW.
 */
static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root,
						 unsigned num_items)
{
3364
	return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3365 3366
}

3367 3368
int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3369 3370
int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3371
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3372 3373
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
C
Chris Mason 已提交
3374 3375
int btrfs_async_run_delayed_refs(struct btrfs_root *root,
				 unsigned long count, int wait);
3376
int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3377 3378
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
3379
			     u64 offset, int metadata, u64 *refs, u64 *flags);
3380 3381
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
3382
int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3383
				    u64 bytenr, u64 num_bytes);
3384 3385
int btrfs_exclude_logged_extents(struct btrfs_root *root,
				 struct extent_buffer *eb);
Y
Yan Zheng 已提交
3386
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3387 3388
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
C
Chris Mason 已提交
3389 3390 3391
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
3392
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3393
int get_block_group_index(struct btrfs_block_group_cache *cache);
3394 3395 3396
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
					struct btrfs_root *root, u64 parent,
					u64 root_objectid,
3397
					struct btrfs_disk_key *key, int level,
3398
					u64 hint, u64 empty_size);
3399 3400 3401
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
3402
			   u64 parent, int last_ref);
3403 3404 3405 3406 3407 3408 3409 3410
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);
3411 3412
int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
			 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3413
			 struct btrfs_key *ins, int is_data, int delalloc);
3414
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3415
		  struct extent_buffer *buf, int full_backref);
3416
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3417
		  struct extent_buffer *buf, int full_backref);
3418 3419 3420
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
				u64 bytenr, u64 num_bytes, u64 flags,
3421
				int level, int is_data);
Z
Zheng Yan 已提交
3422 3423
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
A
Arne Jansen 已提交
3424
		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3425
		      u64 owner, u64 offset);
3426

3427 3428
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
			       int delalloc);
3429 3430
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
				       u64 start, u64 len);
3431 3432
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root);
C
Chris Mason 已提交
3433
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3434
			       struct btrfs_root *root);
C
Chris Mason 已提交
3435
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
3436 3437
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
3438
			 u64 root_objectid, u64 owner, u64 offset);
3439

3440 3441
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root);
C
Chris Mason 已提交
3442 3443
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
3444 3445
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root);
3446
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
3447 3448
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
3449
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3450 3451
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
3452
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
3453
			   u64 size);
Z
Zheng Yan 已提交
3454
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3455 3456
			     struct btrfs_root *root, u64 group_start,
			     struct extent_map *em);
3457
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3458 3459
void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3460 3461
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3462
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3463
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
M
Miao Xie 已提交
3464 3465 3466 3467 3468 3469 3470 3471 3472 3473 3474 3475

enum btrfs_reserve_flush_enum {
	/* If we are in the transaction, we can't flush anything.*/
	BTRFS_RESERVE_NO_FLUSH,
	/*
	 * Flushing delalloc may cause deadlock somewhere, in this
	 * case, use FLUSH LIMIT
	 */
	BTRFS_RESERVE_FLUSH_LIMIT,
	BTRFS_RESERVE_FLUSH_ALL,
};

3476
int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
3477
int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
3478
void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
3479 3480
void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
					    u64 len);
3481 3482
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
3483
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3484 3485 3486
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
3487 3488 3489
int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
				     struct btrfs_block_rsv *rsv,
				     int nitems,
3490
				     u64 *qgroup_reserved, bool use_global_rsv);
3491 3492 3493
void btrfs_subvolume_release_metadata(struct btrfs_root *root,
				      struct btrfs_block_rsv *rsv,
				      u64 qgroup_reserved);
3494 3495
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3496 3497
int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
3498 3499 3500
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root,
					      unsigned short type);
3501 3502
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
3503
void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3504
int btrfs_block_rsv_add(struct btrfs_root *root,
M
Miao Xie 已提交
3505 3506
			struct btrfs_block_rsv *block_rsv, u64 num_bytes,
			enum btrfs_reserve_flush_enum flush);
3507
int btrfs_block_rsv_check(struct btrfs_root *root,
3508 3509
			  struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
M
Miao Xie 已提交
3510 3511
			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,
			   enum btrfs_reserve_flush_enum flush);
3512 3513 3514
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
3515 3516 3517
int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *dest, u64 num_bytes,
			     int min_factor);
3518 3519 3520
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
3521
int btrfs_inc_block_group_ro(struct btrfs_root *root,
3522
			     struct btrfs_block_group_cache *cache);
3523
void btrfs_dec_block_group_ro(struct btrfs_root *root,
3524
			      struct btrfs_block_group_cache *cache);
3525
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3526
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
3527 3528
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
				   u64 start, u64 end);
3529 3530
int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
			 u64 num_bytes, u64 *actual_bytes);
3531 3532
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
3533
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
3534

3535
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3536 3537
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
					 struct btrfs_fs_info *fs_info);
3538
int __get_raid_index(u64 flags);
3539 3540
int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3541 3542
void check_system_chunk(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
3543
			const u64 type);
C
Chris Mason 已提交
3544
/* ctree.c */
3545 3546 3547
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);
3548 3549 3550
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
3551 3552
int btrfs_previous_extent_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid);
3553 3554
void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
			     struct btrfs_path *path,
3555
			     struct btrfs_key *new_key);
3556 3557
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3558
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3559
			struct btrfs_key *key, int lowest_level,
3560
			u64 min_trans);
3561
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3562
			 struct btrfs_path *path,
3563
			 u64 min_trans);
3564 3565 3566 3567
enum btrfs_compare_tree_result {
	BTRFS_COMPARE_TREE_NEW,
	BTRFS_COMPARE_TREE_DELETED,
	BTRFS_COMPARE_TREE_CHANGED,
3568
	BTRFS_COMPARE_TREE_SAME,
3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579
};
typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root,
				  struct btrfs_root *right_root,
				  struct btrfs_path *left_path,
				  struct btrfs_path *right_path,
				  struct btrfs_key *key,
				  enum btrfs_compare_tree_result result,
				  void *ctx);
int btrfs_compare_trees(struct btrfs_root *left_root,
			struct btrfs_root *right_root,
			btrfs_changed_cb_t cb, void *ctx);
3580 3581 3582
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
3583
		    struct extent_buffer **cow_ret);
3584 3585 3586 3587
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);
3588 3589
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
3590
void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3591
		       u32 data_size);
3592
void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3593
			 u32 new_size, int from_end);
3594 3595 3596 3597 3598
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
3599 3600 3601 3602
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
3603 3604
int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path,
		u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key);
3605 3606 3607
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);
J
Jan Schmidt 已提交
3608 3609
int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
			  struct btrfs_path *p, u64 time_seq);
3610 3611 3612
int btrfs_search_slot_for_read(struct btrfs_root *root,
			       struct btrfs_key *key, struct btrfs_path *p,
			       int find_higher, int return_any);
3613
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3614
		       struct btrfs_root *root, struct extent_buffer *parent,
3615
		       int start_slot, u64 *last_ret,
3616
		       struct btrfs_key *progress);
3617
void btrfs_release_path(struct btrfs_path *p);
C
Chris Mason 已提交
3618 3619
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
3620
void btrfs_set_path_blocking(struct btrfs_path *p);
3621
void btrfs_clear_path_blocking(struct btrfs_path *p,
3622
			       struct extent_buffer *held, int held_rw);
3623 3624
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

3625 3626 3627 3628 3629 3630 3631 3632 3633
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);
}

3634
void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3635 3636
			    struct btrfs_key *cpu_key, u32 *data_size,
			    u32 total_data, u32 total_size, int nr);
3637 3638
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652
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
3653
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3654
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
J
Jan Schmidt 已提交
3655 3656
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
			u64 time_seq);
3657 3658
static inline int btrfs_next_old_item(struct btrfs_root *root,
				      struct btrfs_path *p, u64 time_seq)
3659 3660 3661
{
	++p->slots[0];
	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3662
		return btrfs_next_old_leaf(root, p, time_seq);
3663 3664
	return 0;
}
3665 3666 3667 3668
static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
	return btrfs_next_old_item(root, p, 0);
}
3669
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3670 3671 3672
int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
				     struct btrfs_block_rsv *block_rsv,
				     int update_ref, int for_reloc);
Y
Yan Zheng 已提交
3673 3674 3675 3676
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
3677 3678 3679 3680 3681 3682 3683 3684
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
	 * Get synced with close_ctree()
	 */
	smp_mb();
	return fs_info->closing;
}
3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696

/*
 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do
 * anything except sleeping. This function is used to check the status of
 * the fs.
 */
static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root)
{
	return (root->fs_info->sb->s_flags & MS_RDONLY ||
		btrfs_fs_closing(root->fs_info));
}

3697 3698
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
3699
	kfree(fs_info->balance_ctl);
3700 3701 3702 3703 3704 3705
	kfree(fs_info->delayed_root);
	kfree(fs_info->extent_root);
	kfree(fs_info->tree_root);
	kfree(fs_info->chunk_root);
	kfree(fs_info->dev_root);
	kfree(fs_info->csum_root);
3706
	kfree(fs_info->quota_root);
3707
	kfree(fs_info->uuid_root);
3708 3709
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
3710
	security_free_mnt_opts(&fs_info->security_opts);
3711 3712
	kfree(fs_info);
}
3713

3714 3715 3716 3717 3718
/* tree mod log functions from ctree.c */
u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info,
			   struct seq_list *elem);
void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
			    struct seq_list *elem);
J
Jan Schmidt 已提交
3719
int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3720

C
Chris Mason 已提交
3721
/* root-item.c */
3722
int btrfs_find_root_ref(struct btrfs_root *tree_root,
3723 3724
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
3725 3726
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
3727 3728 3729 3730 3731
		       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,
3732
		       const char *name, int name_len);
3733 3734 3735 3736 3737
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);
3738 3739 3740 3741
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct btrfs_key *key,
				   struct btrfs_root_item *item);
3742 3743 3744
int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
		    struct btrfs_path *path, struct btrfs_root_item *root_item,
		    struct btrfs_key *root_key);
3745
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3746 3747
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
3748
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3749 3750
void btrfs_update_root_times(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root);
3751

3752 3753 3754 3755 3756 3757 3758
/* uuid-tree.c */
int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
			struct btrfs_root *uuid_root, u8 *uuid, u8 type,
			u64 subid);
int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
			struct btrfs_root *uuid_root, u8 *uuid, u8 type,
			u64 subid);
3759 3760 3761
int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
			    int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
					      u64));
3762

C
Chris Mason 已提交
3763
/* dir-item.c */
C
Chris Mason 已提交
3764 3765
int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
			  const char *name, int name_len);
C
Chris Mason 已提交
3766 3767
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
3768
			  int name_len, struct inode *dir,
3769
			  struct btrfs_key *location, u8 type, u64 index);
3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780
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);
3781 3782 3783 3784
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);
3785 3786 3787 3788
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
3789
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3790 3791 3792 3793
			    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
3794 3795 3796 3797 3798
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);
3799 3800 3801
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
3802 3803 3804 3805
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
						 struct btrfs_path *path,
						 const char *name,
						 int name_len);
3806 3807 3808 3809 3810 3811

/* 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);
3812
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3813

C
Chris Mason 已提交
3814
/* inode-item.c */
3815 3816 3817
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3818
			   u64 inode_objectid, u64 ref_objectid, u64 index);
3819 3820 3821
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3822
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
3823 3824 3825
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
3826
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3827 3828
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
3829

M
Mark Fasheh 已提交
3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842
struct btrfs_inode_extref *
btrfs_lookup_inode_extref(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 ins_len,
			  int cow);

int btrfs_find_name_in_ext_backref(struct btrfs_path *path,
				   u64 ref_objectid, const char *name,
				   int name_len,
				   struct btrfs_inode_extref **extref_ret);

C
Chris Mason 已提交
3843
/* file-item.c */
3844
struct btrfs_dio_private;
3845 3846
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
3847
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3848
			  struct bio *bio, u32 *dst);
3849
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3850
			      struct bio *bio, u64 logical_offset);
C
Chris Mason 已提交
3851
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
3852 3853 3854 3855 3856
			     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
3857 3858 3859
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
3860
			     u64 bytenr, int mod);
3861
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3862
			   struct btrfs_root *root,
3863
			   struct btrfs_ordered_sum *sums);
3864
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3865
		       struct bio *bio, u64 file_start, int contig);
A
Arne Jansen 已提交
3866 3867
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
3868 3869 3870 3871 3872 3873
void btrfs_extent_item_to_extent_map(struct inode *inode,
				     const struct btrfs_path *path,
				     struct btrfs_file_extent_item *fi,
				     const bool new_inline,
				     struct extent_map *em);

C
Chris Mason 已提交
3874
/* inode.c */
3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887
struct btrfs_delalloc_work {
	struct inode *inode;
	int wait;
	int delay_iput;
	struct completion completion;
	struct list_head list;
	struct btrfs_work work;
};

struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode,
						    int wait, int delay_iput);
void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);

J
Josef Bacik 已提交
3888 3889 3890
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
3891
noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3892 3893
			      u64 *orig_start, u64 *orig_block_len,
			      u64 *ram_bytes);
3894 3895

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3896
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3897 3898 3899 3900 3901
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

L
Li Zefan 已提交
3902 3903 3904 3905 3906 3907 3908 3909
/* This forces readahead on a given range of bytes in an inode */
static inline void btrfs_force_ra(struct address_space *mapping,
				  struct file_ra_state *ra, struct file *file,
				  pgoff_t offset, unsigned long req_size)
{
	page_cache_sync_readahead(mapping, ra, file, offset, req_size);
}

3910 3911
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
3912 3913 3914 3915 3916 3917 3918
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);
3919 3920 3921 3922
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
J
Josef Bacik 已提交
3923 3924
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
			int front);
3925 3926 3927 3928 3929
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
3930
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3931 3932
int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
			       int nr);
3933 3934
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
3935
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3936 3937 3938
			     struct btrfs_root *new_root,
			     struct btrfs_root *parent_root,
			     u64 new_dirid);
3939 3940 3941
int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
			 size_t size, struct bio *bio,
			 unsigned long bio_flags);
3942
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
3943
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
3944
void btrfs_evict_inode(struct inode *inode);
3945
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
C
Chris Mason 已提交
3946 3947
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
3948
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
3949 3950
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
3951
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
3952
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3953
			 struct btrfs_root *root, int *was_new);
3954
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3955
				    size_t pg_offset, u64 start, u64 end,
3956 3957 3958 3959
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
3960 3961
int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
				struct btrfs_root *root, struct inode *inode);
3962
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3963
int btrfs_orphan_cleanup(struct btrfs_root *root);
3964 3965
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
3966
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3967
void btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
3968 3969
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
3970 3971 3972
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);
3973 3974 3975 3976
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);
3977
int btrfs_inode_check_errors(struct inode *inode);
3978
extern const struct dentry_operations btrfs_dentry_operations;
3979 3980 3981
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);
#endif
C
Christoph Hellwig 已提交
3982 3983 3984

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3985 3986
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3987
int btrfs_is_empty_uuid(u8 *uuid);
C
Chris Mason 已提交
3988 3989 3990
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
3991 3992
void btrfs_get_block_group_info(struct list_head *groups_list,
				struct btrfs_ioctl_space_info *space);
3993 3994 3995
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
			       struct btrfs_ioctl_balance_args *bargs);

3996

C
Chris Mason 已提交
3997
/* file.c */
3998 3999
int btrfs_auto_defrag_init(void);
void btrfs_auto_defrag_exit(void);
C
Chris Mason 已提交
4000 4001 4002
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4003
void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4004
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4005 4006
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			     int skip_pinned);
4007
extern const struct file_operations btrfs_file_operations;
J
Josef Bacik 已提交
4008 4009 4010
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root, struct inode *inode,
			 struct btrfs_path *path, u64 start, u64 end,
4011 4012 4013 4014
			 u64 *drop_end, int drop_cache,
			 int replace_extent,
			 u32 extent_item_size,
			 int *key_inserted);
J
Josef Bacik 已提交
4015 4016
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode, u64 start,
4017
		       u64 end, int drop_cache);
Y
Yan Zheng 已提交
4018 4019
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
4020
int btrfs_release_file(struct inode *inode, struct file *file);
4021 4022 4023 4024
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);
4025
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
S
Sage Weil 已提交
4026

4027 4028
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4029
			struct btrfs_root *root);
4030 4031 4032 4033

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);
4034
int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4035
void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4036

J
Josef Bacik 已提交
4037 4038
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
4039

4040
/* super.c */
4041
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
4042
int btrfs_sync_fs(struct super_block *sb, int wait);
4043 4044 4045

#ifdef CONFIG_PRINTK
__printf(2, 3)
4046
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4047 4048
#else
static inline __printf(2, 3)
4049
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4050 4051 4052 4053
{
}
#endif

4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067
#define btrfs_emerg(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_EMERG fmt, ##args)
#define btrfs_alert(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_ALERT fmt, ##args)
#define btrfs_crit(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_CRIT fmt, ##args)
#define btrfs_err(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_ERR fmt, ##args)
#define btrfs_warn(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_WARNING fmt, ##args)
#define btrfs_notice(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_NOTICE fmt, ##args)
#define btrfs_info(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_INFO fmt, ##args)
4068

4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086
/*
 * Wrappers that use printk_in_rcu
 */
#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args)
#define btrfs_alert_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args)
#define btrfs_crit_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args)
#define btrfs_err_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args)
#define btrfs_warn_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args)
#define btrfs_notice_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
#define btrfs_info_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args)

4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104
/*
 * Wrappers that use a ratelimited printk_in_rcu
 */
#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args)
#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args)
#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args)
#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args)
#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args)
#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args)
#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args)

4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121
/*
 * Wrappers that use a ratelimited printk
 */
#define btrfs_emerg_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args)
#define btrfs_alert_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args)
#define btrfs_crit_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args)
#define btrfs_err_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args)
#define btrfs_warn_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args)
#define btrfs_notice_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args)
#define btrfs_info_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args)
4122
#ifdef DEBUG
4123 4124
#define btrfs_debug(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4125 4126
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4127 4128
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4129 4130
#define btrfs_debug_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4131 4132 4133
#else
#define btrfs_debug(fs_info, fmt, args...) \
    no_printk(KERN_DEBUG fmt, ##args)
4134 4135
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4136 4137
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4138 4139
#define btrfs_debug_rl(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4140
#endif
4141

4142 4143 4144 4145 4146 4147 4148
#define btrfs_printk_in_rcu(fs_info, fmt, args...)	\
do {							\
	rcu_read_lock();				\
	btrfs_printk(fs_info, fmt, ##args);		\
	rcu_read_unlock();				\
} while (0)

4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164
#define btrfs_printk_ratelimited(fs_info, fmt, args...)		\
do {								\
	static DEFINE_RATELIMIT_STATE(_rs,			\
		DEFAULT_RATELIMIT_INTERVAL,			\
		DEFAULT_RATELIMIT_BURST);       		\
	if (__ratelimit(&_rs))					\
		btrfs_printk(fs_info, fmt, ##args);		\
} while (0)

#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...)		\
do {								\
	rcu_read_lock();					\
	btrfs_printk_ratelimited(fs_info, fmt, ##args);		\
	rcu_read_unlock();					\
} while (0)

J
Josef Bacik 已提交
4165 4166
#ifdef CONFIG_BTRFS_ASSERT

4167
__cold
J
Josef Bacik 已提交
4168 4169
static inline void assfail(char *expr, char *file, int line)
{
4170
	pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
J
Josef Bacik 已提交
4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181
	       expr, file, line);
	BUG();
}

#define ASSERT(expr)	\
	(likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
#else
#define ASSERT(expr)	((void)0)
#endif

#define btrfs_assert()
4182
__printf(5, 6)
4183
__cold
L
liubo 已提交
4184
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
J
Jeff Mahoney 已提交
4185
		     unsigned int line, int errno, const char *fmt, ...);
L
liubo 已提交
4186

4187
const char *btrfs_decode_error(int errno);
4188

4189
__cold
4190 4191 4192 4193
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root, const char *function,
			       unsigned int line, int errno);

4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205
#define btrfs_set_fs_incompat(__fs_info, opt) \
	__btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)

static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info,
					   u64 flag)
{
	struct btrfs_super_block *disk_super;
	u64 features;

	disk_super = fs_info->super_copy;
	features = btrfs_super_incompat_flags(disk_super);
	if (!(features & flag)) {
4206 4207 4208 4209 4210
		spin_lock(&fs_info->super_lock);
		features = btrfs_super_incompat_flags(disk_super);
		if (!(features & flag)) {
			features |= flag;
			btrfs_set_super_incompat_flags(disk_super, features);
4211
			btrfs_info(fs_info, "setting %llu feature flag",
4212 4213 4214
					 flag);
		}
		spin_unlock(&fs_info->super_lock);
4215 4216 4217
	}
}

4218 4219 4220 4221 4222 4223 4224 4225 4226 4227
#define btrfs_fs_incompat(fs_info, opt) \
	__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)

static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
{
	struct btrfs_super_block *disk_super;
	disk_super = fs_info->super_copy;
	return !!(btrfs_super_incompat_flags(disk_super) & flag);
}

4228 4229 4230 4231
/*
 * Call btrfs_abort_transaction as early as possible when an error condition is
 * detected, that way the exact line number is reported.
 */
4232 4233
#define btrfs_abort_transaction(trans, root, errno)		\
do {								\
4234 4235 4236 4237 4238 4239 4240 4241 4242
	/* Report first abort since mount */			\
	if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED,	\
			&((root)->fs_info->fs_state))) {	\
		WARN(1, KERN_DEBUG				\
		"BTRFS: Transaction aborted (error %d)\n",	\
		(errno));					\
	}							\
	__btrfs_abort_transaction((trans), (root), __func__,	\
				  __LINE__, (errno));		\
4243
} while (0)
L
liubo 已提交
4244

4245
#define btrfs_std_error(fs_info, errno, fmt, args...)		\
J
Jeff Mahoney 已提交
4246 4247 4248
do {								\
	__btrfs_std_error((fs_info), __func__, __LINE__,	\
			  (errno), fmt, ##args);		\
L
liubo 已提交
4249
} while (0)
J
Josef Bacik 已提交
4250

4251
__printf(5, 6)
4252
__cold
J
Jeff Mahoney 已提交
4253 4254 4255
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
		   unsigned int line, int errno, const char *fmt, ...);

4256 4257 4258 4259
/*
 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
 * will panic().  Otherwise we BUG() here.
 */
J
Jeff Mahoney 已提交
4260 4261
#define btrfs_panic(fs_info, errno, fmt, args...)			\
do {									\
4262 4263
	__btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args);	\
	BUG();								\
L
liubo 已提交
4264
} while (0)
J
Josef Bacik 已提交
4265 4266

/* acl.c */
C
Chris Mason 已提交
4267
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
4268
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4269
int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4270 4271
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
4272
#else
4273
#define btrfs_get_acl NULL
4274
#define btrfs_set_acl NULL
4275 4276 4277 4278 4279 4280
static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
				 struct inode *inode, struct inode *dir)
{
	return 0;
}
#endif
J
Josef Bacik 已提交
4281

4282 4283 4284 4285 4286 4287 4288 4289
/* 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);
4290 4291 4292
int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, struct extent_buffer *buf,
			  struct extent_buffer *cow);
4293
void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4294
			      u64 *bytes_to_reserve);
4295
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4296
			      struct btrfs_pending_snapshot *pending);
A
Arne Jansen 已提交
4297 4298

/* scrub.c */
4299 4300
int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
		    u64 end, struct btrfs_scrub_progress *progress,
4301
		    int readonly, int is_dev_replace);
4302 4303
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
4304 4305 4306
int btrfs_scrub_cancel(struct btrfs_fs_info *info);
int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
			   struct btrfs_device *dev);
A
Arne Jansen 已提交
4307 4308
int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
			 struct btrfs_scrub_progress *progress);
4309 4310 4311 4312

/* dev-replace.c */
void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info);
void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info);
4313 4314 4315 4316 4317 4318
void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount);

static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info)
{
	btrfs_bio_counter_sub(fs_info, 1);
}
A
Arne Jansen 已提交
4319

4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335
/* reada.c */
struct reada_control {
	struct btrfs_root	*root;		/* tree to prefetch */
	struct btrfs_key	key_start;
	struct btrfs_key	key_end;	/* exclusive */
	atomic_t		elems;
	struct kref		refcnt;
	wait_queue_head_t	wait;
};
struct reada_control *btrfs_reada_add(struct btrfs_root *root,
			      struct btrfs_key *start, struct btrfs_key *end);
int btrfs_reada_wait(void *handle);
void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
			 u64 start, int err);

4336 4337 4338
static inline int is_fstree(u64 rootid)
{
	if (rootid == BTRFS_FS_TREE_OBJECTID ||
4339 4340
	    ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
	      !btrfs_qgroup_level(rootid)))
4341 4342 4343
		return 1;
	return 0;
}
4344 4345 4346 4347 4348 4349

static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
{
	return signal_pending(current);
}

4350 4351 4352 4353
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_destroy_inode(struct inode *inode);
#endif
4354

4355 4356 4357 4358 4359 4360 4361 4362 4363
static inline int btrfs_test_is_dummy_root(struct btrfs_root *root)
{
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	if (unlikely(test_bit(BTRFS_ROOT_DUMMY_ROOT, &root->state)))
		return 1;
#endif
	return 0;
}

4364
#endif