ctree.h 139.7 KB
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/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

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#ifndef __BTRFS_CTREE__
#define __BTRFS_CTREE__
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#include <linux/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;
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	__le64 offset;
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} __attribute__ ((__packed__));

/* old style backrefs item */
struct btrfs_extent_ref_v0 {
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	__le64 root;
	__le64 generation;
	__le64 objectid;
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;
729
	__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 {
750
	struct btrfs_disk_key location;
751
	__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;
769 770 771
	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
773
	__le64 flags;
774
	__le32 refs;
775 776
	struct btrfs_disk_key drop_progress;
	u8 drop_level;
777
	u8 level;
778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807

	/*
	 * 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__));

819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848
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;

849 850 851 852
	/* 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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1145 1146
	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 1157 1158 1159 1160 1161 1162 1163 1164 1165
	u64 bytes_readonly;	/* total bytes that are read only */

	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 */

1166
	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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1170 1171
	u64 flags;

1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
	/*
	 * 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;

1184
	struct list_head list;
1185
	/* Protected by the spinlock 'lock'. */
1186
	struct list_head ro_bgs;
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1188
	struct rw_semaphore groups_sem;
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	/* for block groups in our same type */
1190
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1191
	wait_queue_head_t wait;
1192 1193

	struct kobject kobj;
1194
	struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
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};

1197 1198 1199 1200 1201 1202 1203 1204
#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

1205 1206 1207 1208 1209
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	struct btrfs_space_info *space_info;
	spinlock_t lock;
1210 1211 1212
	unsigned short full;
	unsigned short type;
	unsigned short failfast;
1213 1214
};

1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237
/*
 * free clusters are used to claim free space in relatively large chunks,
 * allowing us to do less seeky writes.  They are used for all metadata
 * allocations and data allocations in ssd mode.
 */
struct btrfs_free_cluster {
	spinlock_t lock;
	spinlock_t refill_lock;
	struct rb_root root;

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

	/* first extent starting offset */
	u64 window_start;

	struct btrfs_block_group_cache *block_group;
	/*
	 * when a cluster is allocated from a block group, we put the
	 * cluster onto a list in the block group so that it can
	 * be freed before the block group is freed.
	 */
	struct list_head block_group_list;
1238 1239
};

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1240 1241 1242
enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
1243 1244
	BTRFS_CACHE_FAST	= 2,
	BTRFS_CACHE_FINISHED	= 3,
1245
	BTRFS_CACHE_ERROR	= 4,
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};

1248 1249 1250 1251 1252 1253 1254
enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN	= 0,
	BTRFS_DC_ERROR		= 1,
	BTRFS_DC_CLEAR		= 2,
	BTRFS_DC_SETUP		= 3,
};

1255 1256 1257 1258
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
1259
	struct btrfs_work work;
1260 1261 1262 1263 1264
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

1265 1266 1267 1268 1269
struct btrfs_io_ctl {
	void *cur, *orig;
	struct page *page;
	struct page **pages;
	struct btrfs_root *root;
1270
	struct inode *inode;
1271 1272 1273
	unsigned long size;
	int index;
	int num_pages;
1274 1275
	int entries;
	int bitmaps;
1276 1277 1278
	unsigned check_crcs:1;
};

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1279 1280 1281
struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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1282
	struct btrfs_fs_info *fs_info;
1283
	struct inode *inode;
1284
	spinlock_t lock;
1285
	u64 pinned;
1286
	u64 reserved;
1287
	u64 delalloc_bytes;
1288
	u64 bytes_super;
1289
	u64 flags;
1290
	u64 sectorsize;
1291
	u64 cache_generation;
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1293 1294 1295 1296 1297 1298 1299
	/*
	 * 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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1300 1301 1302
	/* for raid56, this is a full stripe, without parity */
	unsigned long full_stripe_len;

1303
	unsigned int ro;
1304
	unsigned int iref:1;
1305
	unsigned int has_caching_ctl:1;
1306
	unsigned int removed:1;
1307 1308

	int disk_cache_state;
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1309

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1310 1311
	/* cache tracking stuff */
	int cached;
1312 1313
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
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1314

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1315 1316 1317
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
1318
	struct btrfs_free_space_ctl *free_space_ctl;
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1319 1320 1321 1322 1323 1324

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

	/* for block groups in the same raid type */
	struct list_head list;
1325 1326 1327

	/* usage count */
	atomic_t count;
1328 1329 1330 1331 1332

	/* 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;
1333

1334 1335
	/* For delayed block group creation or deletion of empty block groups */
	struct list_head bg_list;
1336 1337 1338

	/* For read-only block groups */
	struct list_head ro_list;
1339 1340

	atomic_t trimming;
1341 1342 1343

	/* For dirty block groups */
	struct list_head dirty_list;
1344 1345 1346
	struct list_head io_list;

	struct btrfs_io_ctl io_ctl;
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1347
};
1348

1349 1350 1351 1352 1353 1354
/* delayed seq elem */
struct seq_list {
	struct list_head list;
	u64 seq;
};

1355 1356
#define SEQ_LIST_INIT(name)	{ .list = LIST_HEAD_INIT((name).list), .seq = 0 }

1357 1358 1359 1360 1361
enum btrfs_orphan_cleanup_state {
	ORPHAN_CLEANUP_STARTED	= 1,
	ORPHAN_CLEANUP_DONE	= 2,
};

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1362 1363 1364 1365 1366 1367 1368 1369 1370
/* 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 {
1371 1372 1373 1374
	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

1379 1380
void btrfs_init_async_reclaim_work(struct work_struct *work);

1381
/* fs_info */
1382
struct reloc_control;
1383
struct btrfs_device;
1384
struct btrfs_fs_devices;
1385
struct btrfs_balance_control;
1386
struct btrfs_delayed_root;
1387
struct btrfs_fs_info {
1388
	u8 fsid[BTRFS_FSID_SIZE];
1389
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1390 1391
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
1392 1393
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
1394
	struct btrfs_root *fs_root;
1395
	struct btrfs_root *csum_root;
1396
	struct btrfs_root *quota_root;
1397
	struct btrfs_root *uuid_root;
1398 1399 1400

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
1401 1402

	spinlock_t fs_roots_radix_lock;
1403
	struct radix_tree_root fs_roots_radix;
1404

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1405 1406
	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
1407
	u64 first_logical_byte;
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1408 1409
	struct rb_root block_group_cache_tree;

1410 1411 1412 1413
	/* keep track of unallocated space */
	spinlock_t free_chunk_lock;
	u64 free_chunk_space;

1414 1415
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
1416

1417 1418 1419
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

1420 1421 1422 1423
	/*
	 * block reservation for extent, checksum, root tree and
	 * delayed dir index item
	 */
1424 1425 1426 1427 1428 1429 1430
	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;
1431 1432
	/* block reservation for delayed operations */
	struct btrfs_block_rsv delayed_block_rsv;
1433 1434 1435

	struct btrfs_block_rsv empty_block_rsv;

1436
	u64 generation;
1437
	u64 last_trans_committed;
1438
	u64 avg_delayed_ref_runtime;
1439 1440 1441 1442 1443 1444

	/*
	 * 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;
1445
	unsigned long mount_opt;
1446 1447 1448 1449 1450
	/*
	 * Track requests for actions that need to be done during transaction
	 * commit (like for some mount options).
	 */
	unsigned long pending_changes;
1451
	unsigned long compress_type:4;
1452
	int commit_interval;
1453 1454 1455 1456 1457 1458
	/*
	 * 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.
	 */
1459
	u64 max_inline;
M
Miao Xie 已提交
1460 1461 1462 1463 1464 1465 1466 1467 1468 1469
	/*
	 * 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.
	 */
1470
	u64 alloc_start;
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1471
	struct btrfs_transaction *running_transaction;
1472
	wait_queue_head_t transaction_throttle;
1473
	wait_queue_head_t transaction_wait;
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Sage Weil 已提交
1474
	wait_queue_head_t transaction_blocked_wait;
1475
	wait_queue_head_t async_submit_wait;
1476

1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487
	/*
	 * 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;
1488 1489
	struct btrfs_super_block *super_copy;
	struct btrfs_super_block *super_for_commit;
1490
	struct block_device *__bdev;
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1491
	struct super_block *sb;
1492
	struct inode *btree_inode;
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1493
	struct backing_dev_info bdi;
1494
	struct mutex tree_log_mutex;
1495 1496
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
1497
	struct mutex chunk_mutex;
1498
	struct mutex volume_mutex;
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1499

1500 1501 1502 1503 1504 1505
	/*
	 * 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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1506 1507 1508 1509 1510 1511
	/* 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;

1512 1513 1514 1515 1516 1517 1518 1519
	/*
	 * 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;
1520

1521
	struct rw_semaphore commit_root_sem;
1522

1523
	struct rw_semaphore cleanup_work_sem;
1524

1525
	struct rw_semaphore subvol_sem;
1526 1527
	struct srcu_struct subvol_srcu;

J
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1528
	spinlock_t trans_lock;
C
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1529 1530 1531 1532 1533 1534
	/*
	 * the reloc mutex goes with the trans lock, it is taken
	 * during commit to protect us from the relocation code
	 */
	struct mutex reloc_mutex;

C
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1535
	struct list_head trans_list;
1536
	struct list_head dead_roots;
1537
	struct list_head caching_block_groups;
1538

Y
Yan, Zheng 已提交
1539 1540
	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;
1541
	struct rw_semaphore delayed_iput_sem;
Y
Yan, Zheng 已提交
1542

J
Jan Schmidt 已提交
1543 1544
	/* this protects tree_mod_seq_list */
	spinlock_t tree_mod_seq_lock;
1545
	atomic64_t tree_mod_seq;
J
Jan Schmidt 已提交
1546 1547 1548 1549 1550 1551
	struct list_head tree_mod_seq_list;

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

1552
	atomic_t nr_async_submits;
1553
	atomic_t async_submit_draining;
1554
	atomic_t nr_async_bios;
1555
	atomic_t async_delalloc_pages;
J
Josef Bacik 已提交
1556
	atomic_t open_ioctl_trans;
1557

1558
	/*
1559
	 * this is used to protect the following list -- ordered_roots.
1560
	 */
1561
	spinlock_t ordered_root_lock;
1562 1563

	/*
1564 1565 1566
	 * all fs/file tree roots in which there are data=ordered extents
	 * pending writeback are added into this list.
	 *
1567 1568 1569
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
1570
	struct list_head ordered_roots;
1571

1572
	struct mutex delalloc_root_mutex;
1573 1574 1575
	spinlock_t delalloc_root_lock;
	/* all fs/file tree roots that have delalloc inodes. */
	struct list_head delalloc_roots;
1576

1577 1578 1579 1580 1581 1582
	/*
	 * 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.
1583 1584 1585
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1586
	 */
1587 1588 1589 1590 1591 1592
	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;
1593
	struct btrfs_workqueue *endio_repair_workers;
1594 1595 1596 1597 1598 1599 1600
	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;
1601

1602 1603 1604 1605 1606
	/*
	 * 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
	 */
1607 1608
	struct btrfs_workqueue *fixup_workers;
	struct btrfs_workqueue *delayed_workers;
C
Chris Mason 已提交
1609 1610 1611

	/* the extent workers do delayed refs on the extent allocation tree */
	struct btrfs_workqueue *extent_workers;
1612 1613
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1614
	int thread_pool_size;
1615

1616
	struct kobject *space_info_kobj;
1617
	int do_barriers;
1618
	int closing;
1619
	int log_root_recovering;
1620
	int open;
1621

1622
	u64 total_pinned;
1623

1624 1625
	/* used to keep from writing metadata until there is a nice batch */
	struct percpu_counter dirty_metadata_bytes;
1626
	struct percpu_counter delalloc_bytes;
1627
	s32 dirty_metadata_batch;
1628 1629
	s32 delalloc_batch;

1630 1631
	struct list_head dirty_cowonly_roots;

1632
	struct btrfs_fs_devices *fs_devices;
1633 1634 1635 1636 1637 1638

	/*
	 * 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.
	 */
1639
	struct list_head space_info;
1640

1641 1642
	struct btrfs_space_info *data_sinfo;

1643 1644
	struct reloc_control *reloc_ctl;

1645 1646 1647 1648 1649
	/* 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;
C
Chris Mason 已提交
1650

C
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1651 1652 1653 1654 1655
	/* auto defrag inodes go here */
	spinlock_t defrag_inodes_lock;
	struct rb_root defrag_inodes;
	atomic_t defrag_running;

1656 1657
	/* Used to protect avail_{data, metadata, system}_alloc_bits */
	seqlock_t profiles_lock;
1658 1659 1660 1661 1662
	/*
	 * 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)
	 */
C
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1663 1664 1665
	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
1666

1667 1668 1669
	/* restriper state */
	spinlock_t balance_lock;
	struct mutex balance_mutex;
1670 1671
	atomic_t balance_running;
	atomic_t balance_pause_req;
1672
	atomic_t balance_cancel_req;
1673
	struct btrfs_balance_control *balance_ctl;
1674
	wait_queue_head_t balance_wait_q;
1675

1676 1677 1678
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1679
	void *bdev_holder;
L
liubo 已提交
1680

A
Arne Jansen 已提交
1681 1682 1683 1684 1685 1686 1687 1688
	/* 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;
1689 1690 1691
	struct btrfs_workqueue *scrub_workers;
	struct btrfs_workqueue *scrub_wr_completion_workers;
	struct btrfs_workqueue *scrub_nocow_workers;
1692
	struct btrfs_workqueue *scrub_parity_workers;
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Arne Jansen 已提交
1693

1694 1695 1696
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
	u32 check_integrity_print_mask;
#endif
1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
	/*
	 * 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
1713
	struct rb_root qgroup_op_tree;
1714
	spinlock_t qgroup_lock;
J
Josef Bacik 已提交
1715 1716
	spinlock_t qgroup_op_lock;
	atomic_t qgroup_op_seq;
1717

1718 1719 1720 1721 1722 1723
	/*
	 * used to avoid frequently calling ulist_alloc()/ulist_free()
	 * when doing qgroup accounting, it must be protected by qgroup_lock.
	 */
	struct ulist *qgroup_ulist;

1724 1725 1726
	/* protect user change for quota operations */
	struct mutex qgroup_ioctl_lock;

1727 1728 1729
	/* list of dirty qgroups to be written at next commit */
	struct list_head dirty_qgroups;

1730
	/* used by qgroup for an efficient tree traversal */
1731
	u64 qgroup_seq;
1732

J
Jan Schmidt 已提交
1733 1734 1735
	/* qgroup rescan items */
	struct mutex qgroup_rescan_lock; /* protects the progress item */
	struct btrfs_key qgroup_rescan_progress;
1736
	struct btrfs_workqueue *qgroup_rescan_workers;
1737
	struct completion qgroup_rescan_completion;
1738
	struct btrfs_work qgroup_rescan_work;
J
Jan Schmidt 已提交
1739

L
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1740
	/* filesystem state */
1741
	unsigned long fs_state;
1742 1743

	struct btrfs_delayed_root *delayed_root;
C
Chris Mason 已提交
1744

1745 1746 1747
	/* readahead tree */
	spinlock_t reada_lock;
	struct radix_tree_root reada_tree;
1748

1749 1750 1751 1752
	/* Extent buffer radix tree */
	spinlock_t buffer_lock;
	struct radix_tree_root buffer_radix;

C
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1753 1754
	/* next backup root to be overwritten */
	int backup_root_index;
1755 1756

	int num_tolerated_disk_barrier_failures;
1757 1758 1759

	/* device replace state */
	struct btrfs_dev_replace dev_replace;
1760 1761

	atomic_t mutually_exclusive_operation_running;
S
Stefan Behrens 已提交
1762

1763 1764 1765
	struct percpu_counter bio_counter;
	wait_queue_head_t replace_wait;

S
Stefan Behrens 已提交
1766
	struct semaphore uuid_tree_rescan_sem;
1767
	unsigned int update_uuid_tree_gen:1;
1768 1769 1770

	/* Used to reclaim the metadata space in the background. */
	struct work_struct async_reclaim_work;
1771 1772 1773

	spinlock_t unused_bgs_lock;
	struct list_head unused_bgs;
1774
	struct mutex unused_bg_unpin_mutex;
1775
	struct mutex delete_unused_bgs_mutex;
1776 1777 1778

	/* For btrfs to record security options */
	struct security_mnt_opts security_opts;
1779 1780 1781 1782 1783 1784

	/*
	 * 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;
1785
};
1786

1787 1788 1789 1790 1791
struct btrfs_subvolume_writers {
	struct percpu_counter	counter;
	wait_queue_head_t	wait;
};

1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810
/*
 * 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
1811
#define BTRFS_ROOT_DIRTY		9
1812

1813 1814
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1815
 * and for the extent tree extent_root root.
1816 1817
 */
struct btrfs_root {
1818
	struct extent_buffer *node;
1819

1820
	struct extent_buffer *commit_root;
1821
	struct btrfs_root *log_root;
Z
Zheng Yan 已提交
1822
	struct btrfs_root *reloc_root;
Y
Yan Zheng 已提交
1823

1824
	unsigned long state;
1825 1826
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1827
	struct btrfs_fs_info *fs_info;
1828 1829
	struct extent_io_tree dirty_log_pages;

1830
	struct mutex objectid_mutex;
Y
Yan Zheng 已提交
1831

1832 1833 1834
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1835 1836
	/* free ino cache stuff */
	struct btrfs_free_space_ctl *free_ino_ctl;
1837 1838 1839
	enum btrfs_caching_type ino_cache_state;
	spinlock_t ino_cache_lock;
	wait_queue_head_t ino_cache_wait;
1840
	struct btrfs_free_space_ctl *free_ino_pinned;
1841 1842
	u64 ino_cache_progress;
	struct inode *ino_cache_inode;
1843

1844
	struct mutex log_mutex;
Y
Yan Zheng 已提交
1845 1846
	wait_queue_head_t log_writer_wait;
	wait_queue_head_t log_commit_wait[2];
1847
	struct list_head log_ctxs[2];
Y
Yan Zheng 已提交
1848 1849
	atomic_t log_writers;
	atomic_t log_commit[2];
M
Miao Xie 已提交
1850
	atomic_t log_batch;
1851
	int log_transid;
1852 1853 1854
	/* No matter the commit succeeds or not*/
	int log_transid_committed;
	/* Just be updated when the commit succeeds. */
1855
	int last_log_commit;
1856
	pid_t log_start_pid;
1857

1858 1859
	u64 objectid;
	u64 last_trans;
1860 1861 1862 1863 1864 1865 1866

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

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

1867 1868
	u32 stripesize;

1869
	u32 type;
1870 1871

	u64 highest_objectid;
C
Chris Mason 已提交
1872

1873
	/* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1874 1875
	u64 alloc_bytenr;

1876
	u64 defrag_trans_start;
1877
	struct btrfs_key defrag_progress;
C
Chris Mason 已提交
1878
	struct btrfs_key defrag_max;
1879
	char *name;
1880 1881 1882

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1883

1884 1885
	struct list_head root_list;

1886 1887 1888
	spinlock_t log_extents_lock[2];
	struct list_head logged_list[2];

1889
	spinlock_t orphan_lock;
1890
	atomic_t orphan_inodes;
1891 1892
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_cleanup_state;
1893

1894 1895 1896 1897
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1898 1899 1900 1901 1902
	/*
	 * radix tree that keeps track of delayed nodes of every inode,
	 * protected by inode_lock
	 */
	struct radix_tree_root delayed_nodes_tree;
1903 1904 1905 1906
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
1907
	dev_t anon_dev;
1908

1909
	spinlock_t root_item_lock;
1910
	atomic_t refs;
1911

1912
	struct mutex delalloc_mutex;
1913 1914 1915 1916 1917 1918 1919 1920 1921
	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;
1922 1923

	struct mutex ordered_extent_mutex;
1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937
	/*
	 * 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;
1938 1939 1940 1941 1942 1943

	/*
	 * Number of currently running SEND ioctls to prevent
	 * manipulation with the read-only status via SUBVOL_SETFLAGS
	 */
	int send_in_progress;
1944 1945
	struct btrfs_subvolume_writers *subv_writers;
	atomic_t will_be_snapshoted;
1946 1947 1948

	/* For qgroup metadata space reserve */
	atomic_t qgroup_meta_rsv;
1949 1950
};

C
Chris Mason 已提交
1951 1952 1953 1954 1955 1956 1957 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
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
1983 1984 1985 1986 1987
/*
 * 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
1988
#define BTRFS_INODE_ITEM_KEY		1
1989
#define BTRFS_INODE_REF_KEY		12
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Mark Fasheh 已提交
1990
#define BTRFS_INODE_EXTREF_KEY		13
1991 1992
#define BTRFS_XATTR_ITEM_KEY		24
#define BTRFS_ORPHAN_ITEM_KEY		48
C
Chris Mason 已提交
1993
/* reserve 2-15 close to the inode for later flexibility */
C
Chris Mason 已提交
1994 1995 1996 1997 1998

/*
 * dir items are the name -> inode pointers in a directory.  There is one
 * for every name in a directory.
 */
1999 2000 2001 2002
#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
2003
/*
C
Chris Mason 已提交
2004
 * extent data is for file data
C
Chris Mason 已提交
2005
 */
2006
#define BTRFS_EXTENT_DATA_KEY	108
2007

C
Chris Mason 已提交
2008
/*
2009 2010
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
C
Chris Mason 已提交
2011
 */
2012
#define BTRFS_EXTENT_CSUM_KEY	128
C
Chris Mason 已提交
2013

C
Chris Mason 已提交
2014
/*
W
Wu Fengguang 已提交
2015
 * root items point to tree roots.  They are typically in the root
C
Chris Mason 已提交
2016 2017
 * tree used by the super block to find all the other trees
 */
2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032
#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
2033 2034 2035 2036
/*
 * extent items are in the extent map tree.  These record which blocks
 * are used, and how many references there are to each block
 */
2037
#define BTRFS_EXTENT_ITEM_KEY	168
2038

2039 2040 2041 2042 2043 2044
/*
 * 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

2045 2046 2047 2048 2049 2050 2051 2052 2053
#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
2054 2055 2056 2057 2058

/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
2059
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2060

2061 2062 2063
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
2064

A
Arne Jansen 已提交
2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088
/*
 * 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

2089 2090
#define BTRFS_BALANCE_ITEM_KEY	248

2091 2092 2093 2094 2095 2096
/*
 * 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

2097 2098 2099 2100 2101 2102
/*
 * 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

2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115
/*
 * 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
2116 2117 2118 2119
/*
 * string items are for debugging.  They just store a short string of
 * data in the FS
 */
C
Chris Mason 已提交
2120 2121
#define BTRFS_STRING_ITEM_KEY	253

2122 2123 2124 2125 2126
/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */
2127 2128 2129
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
2130
#define BTRFS_MOUNT_SSD			(1 << 3)
2131
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
C
Chris Mason 已提交
2132
#define BTRFS_MOUNT_COMPRESS		(1 << 5)
S
Sage Weil 已提交
2133
#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
2134
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
2135
#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
C
Chris Mason 已提交
2136
#define BTRFS_MOUNT_NOSSD		(1 << 9)
C
Christoph Hellwig 已提交
2137
#define BTRFS_MOUNT_DISCARD		(1 << 10)
C
Chris Mason 已提交
2138
#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
2139
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
2140
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
2141
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2142
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
C
Chris Mason 已提交
2143
#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
C
Chris Mason 已提交
2144
#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
C
Chris Mason 已提交
2145
#define BTRFS_MOUNT_RECOVERY		(1 << 18)
2146
#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)
2147 2148
#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
J
Jeff Mahoney 已提交
2149
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)
2150
#define BTRFS_MOUNT_RESCAN_UUID_TREE	(1 << 23)
2151

2152
#define BTRFS_DEFAULT_COMMIT_INTERVAL	(30)
2153
#define BTRFS_DEFAULT_MAX_INLINE	(8192)
2154

2155 2156
#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
2157
#define btrfs_raw_test_opt(o, opt)	((o) & BTRFS_MOUNT_##opt)
2158 2159
#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
					 BTRFS_MOUNT_##opt)
2160

2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174
#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);			\
}

2175 2176 2177 2178 2179 2180 2181 2182
/*
 * 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)
 */

2183 2184
#define BTRFS_PENDING_SET_INODE_MAP_CACHE	(0)
#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE	(1)
2185
#define BTRFS_PENDING_COMMIT			(2)
2186

2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217
#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
2218 2219 2220
/*
 * Inode flags
 */
Y
Yan 已提交
2221 2222 2223
#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
C
Chris Mason 已提交
2224
#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
Y
Yan Zheng 已提交
2225
#define BTRFS_INODE_PREALLOC		(1 << 4)
2226 2227 2228 2229 2230 2231
#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)
2232
#define BTRFS_INODE_COMPRESS		(1 << 11)
2233

2234 2235
#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

2236 2237 2238 2239 2240 2241 2242 2243
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
2244
	token->kaddr = NULL;
2245 2246
}

2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266
/* 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
2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289
#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)

2290
#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); \
}
2315 2316 2317 2318

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
2319
	type *p = page_address(eb->pages[0]);				\
D
David Miller 已提交
2320
	u##bits res = le##bits##_to_cpu(p->member);			\
2321
	return res;							\
2322 2323 2324 2325
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
2326
	type *p = page_address(eb->pages[0]);				\
D
David Miller 已提交
2327
	p->member = cpu_to_le##bits(val);				\
2328
}
C
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2329

2330 2331 2332 2333 2334 2335 2336 2337
#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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}

2340 2341 2342 2343 2344
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);
2345 2346
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
2347 2348
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2349 2350 2351
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);
Y
Yan Zheng 已提交
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BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2353

2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365
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);
2366 2367 2368 2369 2370 2371
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);
Y
Yan Zheng 已提交
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BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);
2374

2375
static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2376
{
2377
	return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2378 2379
}

2380
static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
Y
Yan Zheng 已提交
2381
{
2382
	return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
Y
Yan Zheng 已提交
2383 2384
}

2385
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2386 2387 2388 2389 2390 2391 2392
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);
C
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BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2394 2395 2396
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

2397 2398 2399 2400 2401 2402
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);
2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414
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);
C
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BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
			 sub_stripes, 16);
2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428
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;
}

2429 2430 2431 2432 2433
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445
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));
}

2446 2447 2448 2449 2450
/* 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);
2451 2452
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
2453 2454

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2455 2456 2457 2458 2459
		   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);
C
Chris Mason 已提交
2460

2461 2462
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2463
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2464

M
Mark Fasheh 已提交
2465 2466 2467 2468 2469 2470 2471
/* 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);

2472 2473
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2474
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2475
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2476
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2477
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2478 2479 2480 2481 2482
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);
2483
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2484
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501
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);
2502 2503
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2504 2505
BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
C
Chris Mason 已提交
2506

2507
/* struct btrfs_dev_extent */
2508 2509 2510 2511 2512 2513
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);
2514 2515
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

2516
static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2517 2518
{
	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2519
	return (unsigned long)dev + ptr;
2520 2521
}

2522 2523 2524 2525
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);
2526

2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544
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
2545

2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582
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
2583

2584 2585
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2586
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2587 2588 2589 2590
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);
C
Chris Mason 已提交
2591

2592
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2593
{
2594 2595 2596 2597
	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
2598 2599
}

2600 2601
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
Chris Mason 已提交
2602
{
2603 2604 2605 2606
	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
2607 2608
}

2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625
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);
}

2626
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2627
{
2628 2629
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
2630 2631
}

2632 2633 2634
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

2635 2636
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
2637
{
2638 2639 2640 2641
	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);
2642 2643
}

2644 2645 2646
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2647 2648
BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2649

2650
static inline unsigned long btrfs_item_nr_offset(int nr)
2651
{
2652 2653
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
2654 2655
}

2656
static inline struct btrfs_item *btrfs_item_nr(int nr)
C
Chris Mason 已提交
2657
{
2658
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
Chris Mason 已提交
2659 2660
}

2661 2662
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
Chris Mason 已提交
2663
{
2664
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
Chris Mason 已提交
2665 2666
}

2667
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2668
{
2669
	return btrfs_item_end(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2670 2671
}

2672
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2673
{
2674
	return btrfs_item_offset(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2675 2676
}

2677
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2678
{
2679
	return btrfs_item_size(eb, btrfs_item_nr(nr));
C
Chris Mason 已提交
2680 2681
}

2682 2683
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
2684
{
2685
	struct btrfs_item *item = btrfs_item_nr(nr);
2686
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2687 2688
}

2689 2690
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
2691
{
2692
	struct btrfs_item *item = btrfs_item_nr(nr);
2693
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2694 2695
}

2696 2697
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

2698 2699 2700 2701 2702 2703 2704
/*
 * 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);

2705
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
2706
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2707 2708
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2709
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2710 2711 2712 2713 2714 2715 2716
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);
2717

2718 2719 2720
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
2721
{
2722
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2723 2724
}

2725 2726 2727
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
2728
{
2729
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2730 2731
}

2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752
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);
}

2753 2754 2755 2756 2757
/* 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);
2758

C
Chris Mason 已提交
2759 2760 2761 2762
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
2763
	cpu->type = disk->type;
C
Chris Mason 已提交
2764 2765 2766 2767 2768 2769 2770
	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);
2771
	disk->type = cpu->type;
C
Chris Mason 已提交
2772 2773 2774
	disk->objectid = cpu_to_le64(cpu->objectid);
}

2775 2776
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2777
{
2778 2779 2780
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2781 2782
}

2783 2784
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2785
{
2786 2787 2788
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2789 2790
}

2791 2792 2793
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
2794
{
2795 2796 2797
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
2798 2799
}

2800

2801
static inline u8 btrfs_key_type(struct btrfs_key *key)
2802
{
2803
	return key->type;
2804 2805
}

2806
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2807
{
2808
	key->type = val;
2809 2810
}

2811
/* struct btrfs_header */
2812
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2813 2814 2815 2816
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);
2817
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2818
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2819 2820 2821 2822 2823 2824
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);
2825

2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844
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;
}

2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859
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);
}

2860
static inline unsigned long btrfs_header_fsid(void)
2861
{
2862
	return offsetof(struct btrfs_header, fsid);
2863 2864
}

2865
static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2866
{
2867
	return offsetof(struct btrfs_header, chunk_tree_uuid);
2868 2869
}

2870
static inline int btrfs_is_leaf(struct extent_buffer *eb)
2871
{
C
Chris Mason 已提交
2872
	return btrfs_header_level(eb) == 0;
2873 2874
}

2875
/* struct btrfs_root_item */
2876 2877
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
2878
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2879 2880
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2881

2882 2883
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
2884 2885
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2886 2887
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);
2888
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2889 2890
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
2891 2892
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902
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
2903

L
Li Zefan 已提交
2904 2905
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
2906
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
L
Li Zefan 已提交
2907 2908
}

2909 2910 2911 2912 2913
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
2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 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
/* 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);

2963 2964
/* struct btrfs_balance_item */
BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
2965

2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 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
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);
3023
	cpu->limit = le64_to_cpu(disk->limit);
3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040
}

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);
3041
	disk->limit = cpu_to_le64(cpu->limit);
3042 3043 3044
}

/* struct btrfs_super_block */
3045
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3046
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3047 3048 3049
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3050 3051
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
3052 3053
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
3054 3055
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
3056 3057 3058
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,
3059 3060 3061
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
3062 3063
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
3064 3065
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
3066 3067 3068 3069
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);
3070 3071 3072 3073
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
			 sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
			 nodesize, 32);
3074 3075
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
3076 3077
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
3078 3079
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
3080 3081 3082
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,
3083
			 compat_ro_flags, 64);
3084 3085
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
3086 3087
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
3088 3089
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
3090
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3091 3092
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
			 uuid_tree_generation, 64);
3093 3094 3095

static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
D
David Sterba 已提交
3096 3097 3098 3099
	u16 t = btrfs_super_csum_type(s);
	/*
	 * csum type is validated at mount time
	 */
3100 3101
	return btrfs_csum_sizes[t];
}
3102

3103
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3104
{
3105
	return offsetof(struct btrfs_leaf, items);
3106 3107
}

3108 3109
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3110 3111 3112 3113 3114 3115 3116 3117
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);
3118 3119 3120 3121
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);
3122

C
Chris Mason 已提交
3123 3124
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3125
{
3126
	return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3127 3128 3129 3130
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
3131
	return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3132 3133
}

3134 3135
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
3136 3137
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
3138 3139
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
3140 3141
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
3142 3143
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160
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)
{
3161
	return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
C
Chris Mason 已提交
3162
}
3163

3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189
/* 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);
}


3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213
/* 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
3214 3215 3216 3217 3218 3219 3220
/* 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
3221 3222
BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
		   rescan, 64);
A
Arne Jansen 已提交
3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256

/* 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);

3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299
/* 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);

3300
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
C
Chris Mason 已提交
3301 3302 3303 3304
{
	return sb->s_fs_info;
}

3305 3306
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
3307
	((type *)(btrfs_leaf_data(leaf) + \
3308 3309 3310 3311 3312
	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)))
3313

3314 3315 3316 3317 3318 3319
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));
}

3320 3321 3322 3323 3324
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
3325
/* extent-tree.c */
3326 3327 3328

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

3329
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3330
						 unsigned num_items)
3331
{
3332
	return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3333
		2 * num_items;
3334 3335 3336 3337 3338 3339 3340 3341 3342
}

/*
 * 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)
{
3343
	return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3344 3345
}

3346 3347
int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3348 3349
int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3350
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3351 3352
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
C
Chris Mason 已提交
3353 3354
int btrfs_async_run_delayed_refs(struct btrfs_root *root,
				 unsigned long count, int wait);
3355
int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3356 3357
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
3358
			     u64 offset, int metadata, u64 *refs, u64 *flags);
3359 3360
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
3361
int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3362
				    u64 bytenr, u64 num_bytes);
3363 3364
int btrfs_exclude_logged_extents(struct btrfs_root *root,
				 struct extent_buffer *eb);
Y
Yan Zheng 已提交
3365
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3366 3367
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
C
Chris Mason 已提交
3368 3369 3370
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
3371
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3372
int get_block_group_index(struct btrfs_block_group_cache *cache);
3373 3374 3375
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
					struct btrfs_root *root, u64 parent,
					u64 root_objectid,
3376
					struct btrfs_disk_key *key, int level,
3377
					u64 hint, u64 empty_size);
3378 3379 3380
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
3381
			   u64 parent, int last_ref);
3382 3383 3384 3385 3386 3387 3388 3389
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);
3390 3391
int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
			 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3392
			 struct btrfs_key *ins, int is_data, int delalloc);
3393
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3394
		  struct extent_buffer *buf, int full_backref);
3395
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3396
		  struct extent_buffer *buf, int full_backref);
3397 3398 3399
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
				u64 bytenr, u64 num_bytes, u64 flags,
3400
				int level, int is_data);
Z
Zheng Yan 已提交
3401 3402
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
A
Arne Jansen 已提交
3403
		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
J
Josef Bacik 已提交
3404
		      u64 owner, u64 offset, int no_quota);
3405

3406 3407
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
			       int delalloc);
3408 3409
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
				       u64 start, u64 len);
3410 3411
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root);
C
Chris Mason 已提交
3412
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3413
			       struct btrfs_root *root);
C
Chris Mason 已提交
3414
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
3415 3416
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
J
Josef Bacik 已提交
3417
			 u64 root_objectid, u64 owner, u64 offset, int no_quota);
3418

3419 3420
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root);
C
Chris Mason 已提交
3421 3422
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
3423 3424
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root);
3425
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
3426 3427
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
3428
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3429 3430
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
3431
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
3432
			   u64 size);
Z
Zheng Yan 已提交
3433
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3434 3435
			     struct btrfs_root *root, u64 group_start,
			     struct extent_map *em);
3436
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3437 3438
void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3439 3440
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3441
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3442
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
M
Miao Xie 已提交
3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 3453 3454

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,
};

3455
int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes);
3456
void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes);
3457 3458
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
3459
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3460 3461 3462
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
3463 3464 3465
int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
				     struct btrfs_block_rsv *rsv,
				     int nitems,
3466
				     u64 *qgroup_reserved, bool use_global_rsv);
3467 3468 3469
void btrfs_subvolume_release_metadata(struct btrfs_root *root,
				      struct btrfs_block_rsv *rsv,
				      u64 qgroup_reserved);
3470 3471 3472 3473
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes);
3474 3475 3476
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);
3477 3478
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
3479
void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3480
int btrfs_block_rsv_add(struct btrfs_root *root,
M
Miao Xie 已提交
3481 3482
			struct btrfs_block_rsv *block_rsv, u64 num_bytes,
			enum btrfs_reserve_flush_enum flush);
3483
int btrfs_block_rsv_check(struct btrfs_root *root,
3484 3485
			  struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
M
Miao Xie 已提交
3486 3487
			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,
			   enum btrfs_reserve_flush_enum flush);
3488 3489 3490
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
3491 3492 3493
int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *dest, u64 num_bytes,
			     int min_factor);
3494 3495 3496
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
3497
int btrfs_inc_block_group_ro(struct btrfs_root *root,
3498
			     struct btrfs_block_group_cache *cache);
3499
void btrfs_dec_block_group_ro(struct btrfs_root *root,
3500
			      struct btrfs_block_group_cache *cache);
3501
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3502
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
3503 3504
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
				   u64 start, u64 end);
3505 3506
int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
			 u64 num_bytes, u64 *actual_bytes);
3507 3508
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
3509
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
3510

3511
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3512 3513
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
					 struct btrfs_fs_info *fs_info);
3514
int __get_raid_index(u64 flags);
3515 3516
int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3517 3518
void check_system_chunk(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
3519
			const u64 type);
C
Chris Mason 已提交
3520
/* ctree.c */
3521 3522 3523
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);
3524 3525 3526
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
3527 3528
int btrfs_previous_extent_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid);
3529 3530
void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
			     struct btrfs_path *path,
3531
			     struct btrfs_key *new_key);
3532 3533
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3534
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3535
			struct btrfs_key *key, int lowest_level,
3536
			u64 min_trans);
3537
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3538
			 struct btrfs_path *path,
3539
			 u64 min_trans);
3540 3541 3542 3543
enum btrfs_compare_tree_result {
	BTRFS_COMPARE_TREE_NEW,
	BTRFS_COMPARE_TREE_DELETED,
	BTRFS_COMPARE_TREE_CHANGED,
3544
	BTRFS_COMPARE_TREE_SAME,
3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555
};
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);
3556 3557 3558
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
3559
		    struct extent_buffer **cow_ret);
3560 3561 3562 3563
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);
3564 3565
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
3566
void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3567
		       u32 data_size);
3568
void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3569
			 u32 new_size, int from_end);
3570 3571 3572 3573 3574
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
3575 3576 3577 3578
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
3579 3580
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);
3581 3582 3583
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
3584 3585
int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
			  struct btrfs_path *p, u64 time_seq);
3586 3587 3588
int btrfs_search_slot_for_read(struct btrfs_root *root,
			       struct btrfs_key *key, struct btrfs_path *p,
			       int find_higher, int return_any);
3589
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3590
		       struct btrfs_root *root, struct extent_buffer *parent,
3591
		       int start_slot, u64 *last_ret,
3592
		       struct btrfs_key *progress);
3593
void btrfs_release_path(struct btrfs_path *p);
C
Chris Mason 已提交
3594 3595
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
3596
void btrfs_set_path_blocking(struct btrfs_path *p);
3597
void btrfs_clear_path_blocking(struct btrfs_path *p,
3598
			       struct extent_buffer *held, int held_rw);
3599 3600
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

3601 3602 3603 3604 3605 3606 3607 3608 3609
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);
}

3610
void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3611 3612
			    struct btrfs_key *cpu_key, u32 *data_size,
			    u32 total_data, u32 total_size, int nr);
3613 3614
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628
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
3629
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3630
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
J
Jan Schmidt 已提交
3631 3632
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
			u64 time_seq);
3633 3634
static inline int btrfs_next_old_item(struct btrfs_root *root,
				      struct btrfs_path *p, u64 time_seq)
3635 3636 3637
{
	++p->slots[0];
	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3638
		return btrfs_next_old_leaf(root, p, time_seq);
3639 3640
	return 0;
}
3641 3642 3643 3644
static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
	return btrfs_next_old_item(root, p, 0);
}
3645
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3646 3647 3648
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
3649 3650 3651 3652
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
3653 3654 3655 3656 3657 3658 3659 3660
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
	 * Get synced with close_ctree()
	 */
	smp_mb();
	return fs_info->closing;
}
3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672

/*
 * 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));
}

3673 3674
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
3675
	kfree(fs_info->balance_ctl);
3676 3677 3678 3679 3680 3681
	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);
3682
	kfree(fs_info->quota_root);
3683
	kfree(fs_info->uuid_root);
3684 3685
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
3686
	security_free_mnt_opts(&fs_info->security_opts);
3687 3688
	kfree(fs_info);
}
3689

3690 3691 3692 3693 3694
/* 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
3695
int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3696

C
Chris Mason 已提交
3697
/* root-item.c */
3698
int btrfs_find_root_ref(struct btrfs_root *tree_root,
3699 3700
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
3701 3702
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
3703 3704 3705 3706 3707
		       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,
3708
		       const char *name, int name_len);
3709 3710 3711 3712 3713
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);
3714 3715 3716 3717
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct btrfs_key *key,
				   struct btrfs_root_item *item);
3718 3719 3720
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);
3721
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3722 3723
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
3724
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3725 3726
void btrfs_update_root_times(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root);
3727

3728 3729 3730 3731 3732 3733 3734
/* 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);
3735 3736 3737
int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
			    int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
					      u64));
3738

C
Chris Mason 已提交
3739
/* dir-item.c */
C
Chris Mason 已提交
3740 3741
int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
			  const char *name, int name_len);
C
Chris Mason 已提交
3742 3743
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
3744
			  int name_len, struct inode *dir,
3745
			  struct btrfs_key *location, u8 type, u64 index);
3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756
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);
3757 3758 3759 3760
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);
3761 3762 3763 3764
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
3765
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3766 3767 3768 3769
			    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
3770 3771 3772 3773 3774
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);
3775 3776 3777
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
3778 3779 3780 3781
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
						 struct btrfs_path *path,
						 const char *name,
						 int name_len);
3782 3783 3784 3785 3786 3787

/* 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);
3788
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3789

C
Chris Mason 已提交
3790
/* inode-item.c */
3791 3792 3793
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3794
			   u64 inode_objectid, u64 ref_objectid, u64 index);
3795 3796 3797
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3798
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
3799 3800 3801
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
3802
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3803 3804
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
3805

M
Mark Fasheh 已提交
3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818
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
3819
/* file-item.c */
3820
struct btrfs_dio_private;
3821 3822
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
3823
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3824
			  struct bio *bio, u32 *dst);
3825
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3826
			      struct bio *bio, u64 logical_offset);
C
Chris Mason 已提交
3827
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
3828 3829 3830 3831 3832
			     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
3833 3834 3835
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
3836
			     u64 bytenr, int mod);
3837
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3838
			   struct btrfs_root *root,
3839
			   struct btrfs_ordered_sum *sums);
3840
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3841
		       struct bio *bio, u64 file_start, int contig);
A
Arne Jansen 已提交
3842 3843
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
3844 3845 3846 3847 3848 3849
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
3850
/* inode.c */
3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863
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
3864 3865 3866
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
3867
noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
3868 3869
			      u64 *orig_start, u64 *orig_block_len,
			      u64 *ram_bytes);
3870 3871

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
3872
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
3873 3874 3875 3876 3877
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

L
Li Zefan 已提交
3878 3879 3880 3881 3882 3883 3884 3885
/* 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);
}

3886 3887
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
3888 3889 3890 3891 3892 3893 3894
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);
3895 3896 3897 3898
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
3899 3900
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
			int front);
3901 3902 3903 3904 3905
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
3906
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
3907 3908
int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
			       int nr);
3909 3910
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
3911
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
3912 3913 3914
			     struct btrfs_root *new_root,
			     struct btrfs_root *parent_root,
			     u64 new_dirid);
3915 3916 3917
int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
			 size_t size, struct bio *bio,
			 unsigned long bio_flags);
3918
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
3919
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
3920
void btrfs_evict_inode(struct inode *inode);
3921
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
C
Chris Mason 已提交
3922 3923
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
3924
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
3925 3926
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
3927
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
3928
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
3929
			 struct btrfs_root *root, int *was_new);
3930
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
3931
				    size_t pg_offset, u64 start, u64 end,
3932 3933 3934 3935
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
3936 3937
int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
				struct btrfs_root *root, struct inode *inode);
3938
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
3939
int btrfs_orphan_cleanup(struct btrfs_root *root);
3940 3941
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
3942
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
3943
void btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
3944 3945
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
3946 3947 3948
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);
3949 3950 3951 3952
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);
3953
int btrfs_inode_check_errors(struct inode *inode);
3954
extern const struct dentry_operations btrfs_dentry_operations;
3955 3956 3957
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);
#endif
C
Christoph Hellwig 已提交
3958 3959 3960

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
3961 3962
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
3963
int btrfs_is_empty_uuid(u8 *uuid);
C
Chris Mason 已提交
3964 3965 3966
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
3967 3968
void btrfs_get_block_group_info(struct list_head *groups_list,
				struct btrfs_ioctl_space_info *space);
3969 3970 3971
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
			       struct btrfs_ioctl_balance_args *bargs);

3972

C
Chris Mason 已提交
3973
/* file.c */
3974 3975
int btrfs_auto_defrag_init(void);
void btrfs_auto_defrag_exit(void);
C
Chris Mason 已提交
3976 3977 3978
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
3979
void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
3980
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
3981 3982
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			     int skip_pinned);
3983
extern const struct file_operations btrfs_file_operations;
J
Josef Bacik 已提交
3984 3985 3986
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root, struct inode *inode,
			 struct btrfs_path *path, u64 start, u64 end,
3987 3988 3989 3990
			 u64 *drop_end, int drop_cache,
			 int replace_extent,
			 u32 extent_item_size,
			 int *key_inserted);
J
Josef Bacik 已提交
3991 3992
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode, u64 start,
3993
		       u64 end, int drop_cache);
Y
Yan Zheng 已提交
3994 3995
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
3996
int btrfs_release_file(struct inode *inode, struct file *file);
3997 3998 3999 4000
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);
4001
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
S
Sage Weil 已提交
4002

4003 4004
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4005
			struct btrfs_root *root);
4006 4007 4008 4009

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);
4010
int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4011
void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4012

J
Josef Bacik 已提交
4013 4014
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
4015

4016
/* super.c */
4017
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
4018
int btrfs_sync_fs(struct super_block *sb, int wait);
4019 4020 4021

#ifdef CONFIG_PRINTK
__printf(2, 3)
4022
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4023 4024
#else
static inline __printf(2, 3)
4025
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4026 4027 4028 4029
{
}
#endif

4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043
#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)
4044

4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062
/*
 * 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)

4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080
/*
 * 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)

4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097
/*
 * 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)
4098
#ifdef DEBUG
4099 4100
#define btrfs_debug(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4101 4102
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4103 4104
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4105 4106
#define btrfs_debug_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4107 4108 4109
#else
#define btrfs_debug(fs_info, fmt, args...) \
    no_printk(KERN_DEBUG fmt, ##args)
4110 4111
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4112 4113
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4114 4115
#define btrfs_debug_rl(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4116
#endif
4117

4118 4119 4120 4121 4122 4123 4124
#define btrfs_printk_in_rcu(fs_info, fmt, args...)	\
do {							\
	rcu_read_lock();				\
	btrfs_printk(fs_info, fmt, ##args);		\
	rcu_read_unlock();				\
} while (0)

4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140
#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
4141 4142
#ifdef CONFIG_BTRFS_ASSERT

4143
__cold
J
Josef Bacik 已提交
4144 4145
static inline void assfail(char *expr, char *file, int line)
{
4146
	pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
J
Josef Bacik 已提交
4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157
	       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()
4158
__printf(5, 6)
4159
__cold
L
liubo 已提交
4160
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
J
Jeff Mahoney 已提交
4161
		     unsigned int line, int errno, const char *fmt, ...);
L
liubo 已提交
4162

4163
const char *btrfs_decode_error(int errno);
4164

4165
__cold
4166 4167 4168 4169
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root, const char *function,
			       unsigned int line, int errno);

4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181
#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)) {
4182 4183 4184 4185 4186
		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);
4187
			btrfs_info(fs_info, "setting %llu feature flag",
4188 4189 4190
					 flag);
		}
		spin_unlock(&fs_info->super_lock);
4191 4192 4193
	}
}

4194 4195 4196 4197 4198 4199 4200 4201 4202 4203
#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);
}

4204 4205 4206 4207
/*
 * Call btrfs_abort_transaction as early as possible when an error condition is
 * detected, that way the exact line number is reported.
 */
4208 4209
#define btrfs_abort_transaction(trans, root, errno)		\
do {								\
4210 4211 4212 4213 4214 4215 4216 4217 4218
	/* 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));		\
4219
} while (0)
L
liubo 已提交
4220

4221
#define btrfs_std_error(fs_info, errno, fmt, args...)		\
J
Jeff Mahoney 已提交
4222 4223 4224
do {								\
	__btrfs_std_error((fs_info), __func__, __LINE__,	\
			  (errno), fmt, ##args);		\
L
liubo 已提交
4225
} while (0)
J
Josef Bacik 已提交
4226

4227
__printf(5, 6)
4228
__cold
J
Jeff Mahoney 已提交
4229 4230 4231
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
		   unsigned int line, int errno, const char *fmt, ...);

4232 4233 4234 4235
/*
 * 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
4236 4237
#define btrfs_panic(fs_info, errno, fmt, args...)			\
do {									\
4238 4239
	__btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args);	\
	BUG();								\
L
liubo 已提交
4240
} while (0)
J
Josef Bacik 已提交
4241 4242

/* acl.c */
C
Chris Mason 已提交
4243
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
4244
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4245
int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4246 4247
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
4248
#else
4249
#define btrfs_get_acl NULL
4250
#define btrfs_set_acl NULL
4251 4252 4253 4254 4255 4256
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
4257

4258 4259 4260 4261 4262 4263 4264 4265
/* 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);
4266 4267 4268
int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, struct extent_buffer *buf,
			  struct extent_buffer *cow);
4269
void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4270
			      u64 *bytes_to_reserve);
4271
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4272
			      struct btrfs_pending_snapshot *pending);
A
Arne Jansen 已提交
4273 4274

/* scrub.c */
4275 4276
int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
		    u64 end, struct btrfs_scrub_progress *progress,
4277
		    int readonly, int is_dev_replace);
4278 4279
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
4280 4281 4282
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
4283 4284
int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
			 struct btrfs_scrub_progress *progress);
4285 4286 4287 4288

/* 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);
4289 4290 4291 4292 4293 4294
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
4295

4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311
/* 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);

4312 4313 4314
static inline int is_fstree(u64 rootid)
{
	if (rootid == BTRFS_FS_TREE_OBJECTID ||
4315 4316
	    ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
	      !btrfs_qgroup_level(rootid)))
4317 4318 4319
		return 1;
	return 0;
}
4320 4321 4322 4323 4324 4325

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

4326 4327 4328 4329
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_destroy_inode(struct inode *inode);
#endif
4330

4331 4332 4333 4334 4335 4336 4337 4338 4339
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;
}

4340
#endif