ctree.h 145.9 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 <linux/sizes.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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/* tracks free space in block groups. */
#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL

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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 const 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	SZ_32M
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#define BTRFS_MAX_EXTENT_SIZE SZ_128M
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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_COMPAT_RO_FREE_SPACE_TREE	(1ULL << 0)

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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			\
	(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)

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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
597 598 599 600 601
 * to any other levels that are present.
 *
 * The slots array records the index of the item or block pointer
 * used while walking the tree.
 */
602
enum { READA_NONE = 0, READA_BACK, READA_FORWARD };
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struct btrfs_path {
604
	struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
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	int slots[BTRFS_MAX_LEVEL];
606
	/* if there is real range locking, this locks field will change */
607
	u8 locks[BTRFS_MAX_LEVEL];
608
	u8 reada;
609
	/* keep some upper locks as we walk down */
610
	u8 lowest_level;
611 612 613 614 615

	/*
	 * set by btrfs_split_item, tells search_slot to keep all locks
	 * and to force calls to keep space in the nodes
	 */
616 617 618 619
	unsigned int search_for_split:1;
	unsigned int keep_locks:1;
	unsigned int skip_locking:1;
	unsigned int leave_spinning:1;
620
	unsigned int search_commit_root:1;
621
	unsigned int need_commit_sem:1;
622
	unsigned int skip_release_on_error:1;
623
};
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625 626 627 628
/*
 * items in the extent btree are used to record the objectid of the
 * owner of the block and the number of references
 */
629

630
struct btrfs_extent_item {
631 632 633 634 635 636
	__le64 refs;
	__le64 generation;
	__le64 flags;
} __attribute__ ((__packed__));

struct btrfs_extent_item_v0 {
637
	__le32 refs;
638 639
} __attribute__ ((__packed__));

640 641 642 643 644 645 646 647 648 649 650
#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)

657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
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;
675
	__le64 offset;
676 677 678 679
} __attribute__ ((__packed__));

/* old style backrefs item */
struct btrfs_extent_ref_v0 {
680 681 682
	__le64 root;
	__le64 generation;
	__le64 objectid;
683
	__le32 count;
684 685
} __attribute__ ((__packed__));

686

687 688
/* dev extents record free space on individual devices.  The owner
 * field points back to the chunk allocation mapping tree that allocated
689
 * the extent.  The chunk tree uuid field is a way to double check the owner
690 691
 */
struct btrfs_dev_extent {
692 693 694
	__le64 chunk_tree;
	__le64 chunk_objectid;
	__le64 chunk_offset;
695
	__le64 length;
696
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
697 698
} __attribute__ ((__packed__));

699
struct btrfs_inode_ref {
700
	__le64 index;
701 702 703 704
	__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__));

713
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 {
719 720
	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 {
727
	/* nfs style generation number */
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	__le64 generation;
729 730
	/* transid that last touched this inode */
	__le64 transid;
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	__le64 size;
732
	__le64 nbytes;
733
	__le64 block_group;
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	__le32 nlink;
	__le32 uid;
	__le32 gid;
	__le32 mode;
738
	__le64 rdev;
739
	__le64 flags;
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741 742 743 744 745 746 747 748
	/* 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];
749 750 751 752
	struct btrfs_timespec atime;
	struct btrfs_timespec ctime;
	struct btrfs_timespec mtime;
	struct btrfs_timespec otime;
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} __attribute__ ((__packed__));

755 756 757 758
struct btrfs_dir_log_item {
	__le64 end;
} __attribute__ ((__packed__));

759
struct btrfs_dir_item {
760
	struct btrfs_disk_key location;
761
	__le64 transid;
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	__le16 data_len;
763
	__le16 name_len;
764 765 766
	u8 type;
} __attribute__ ((__packed__));

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#define BTRFS_ROOT_SUBVOL_RDONLY	(1ULL << 0)

769 770 771 772 773 774
/*
 * 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)

775
struct btrfs_root_item {
776
	struct btrfs_inode_item inode;
777
	__le64 generation;
778
	__le64 root_dirid;
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	__le64 bytenr;
	__le64 byte_limit;
	__le64 bytes_used;
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	__le64 last_snapshot;
783
	__le64 flags;
784
	__le32 refs;
785 786
	struct btrfs_disk_key drop_progress;
	u8 drop_level;
787
	u8 level;
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817

	/*
	 * 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 */
818
} __attribute__ ((__packed__));
819

820 821 822 823 824 825 826 827 828
/*
 * this is used for both forward and backward root refs
 */
struct btrfs_root_ref {
	__le64 dirid;
	__le64 sequence;
	__le16 name_len;
} __attribute__ ((__packed__));

829 830 831 832 833 834 835
struct btrfs_disk_balance_args {
	/*
	 * profiles to operate on, single is denoted by
	 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
	 */
	__le64 profiles;

836 837 838 839 840 841 842 843 844 845 846 847
	/*
	 * usage filter
	 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
	 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
	 */
	union {
		__le64 usage;
		struct {
			__le32 usage_min;
			__le32 usage_max;
		};
	};
848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868

	/* 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;

869 870 871 872 873 874 875 876 877 878 879 880
	/*
	 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
	 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
	 * and maximum
	 */
	union {
		__le64 limit;
		struct {
			__le32 limit_min;
			__le32 limit_max;
		};
	};
881

882 883 884 885 886 887 888 889
	/*
	 * Process chunks that cross stripes_min..stripes_max devices,
	 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
	 */
	__le32 stripes_min;
	__le32 stripes_max;

	__le64 unused[6];
890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906
} __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
910

911
struct btrfs_file_extent_item {
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	/*
	 * transaction id that created this extent
	 */
915
	__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? */
937
	u8 type;
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939 940 941
	/*
	 * disk space consumed by the extent, checksum blocks are included
	 * in these numbers
942 943
	 *
	 * At this offset in the structure, the inline extent data start.
944
	 */
945 946
	__le64 disk_bytenr;
	__le64 disk_num_bytes;
947
	/*
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	 * the logical offset in file blocks (no csums)
949 950 951 952 953 954 955
	 * 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.
958
	 */
959
	__le64 num_bytes;
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961 962
} __attribute__ ((__packed__));

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struct btrfs_csum_item {
964
	u8 csum;
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} __attribute__ ((__packed__));

967 968 969 970 971 972 973 974
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__));

975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010
#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;
};

1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
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__));

1028
/* different types of block groups (and chunks) */
1029 1030 1031 1032 1033 1034 1035
#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)
1038 1039
#define BTRFS_BLOCK_GROUP_RESERVED	(BTRFS_AVAIL_ALLOC_BIT_SINGLE | \
					 BTRFS_SPACE_INFO_GLOBAL_RSV)
1040 1041 1042 1043 1044 1045 1046

enum btrfs_raid_types {
	BTRFS_RAID_RAID10,
	BTRFS_RAID_RAID1,
	BTRFS_RAID_DUP,
	BTRFS_RAID_RAID0,
	BTRFS_RAID_SINGLE,
1047 1048
	BTRFS_RAID_RAID5,
	BTRFS_RAID_RAID6,
1049 1050
	BTRFS_NR_RAID_TYPES
};
1051 1052 1053 1054 1055 1056 1057

#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 |   \
1060 1061
					 BTRFS_BLOCK_GROUP_DUP |     \
					 BTRFS_BLOCK_GROUP_RAID10)
1062 1063 1064
#define BTRFS_BLOCK_GROUP_RAID56_MASK	(BTRFS_BLOCK_GROUP_RAID5 |   \
					 BTRFS_BLOCK_GROUP_RAID6)

1065 1066 1067 1068 1069 1070 1071 1072 1073
/*
 * 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)

1074 1075 1076 1077 1078 1079
/*
 * 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)

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094
#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;
1097 1098
	__le64 chunk_objectid;
	__le64 flags;
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} __attribute__ ((__packed__));

1101 1102 1103 1104 1105 1106 1107
struct btrfs_free_space_info {
	__le32 extent_count;
	__le32 flags;
} __attribute__ ((__packed__));

#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)

1108 1109 1110 1111 1112 1113
#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__));

1180 1181 1182 1183 1184 1185
/* For raid type sysfs entries */
struct raid_kobject {
	int raid_type;
	struct kobject kobj;
};

1186
struct btrfs_space_info {
1187
	spinlock_t lock;
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	u64 total_bytes;	/* total bytes in the space,
				   this doesn't take mirrors into account */
1191
	u64 bytes_used;		/* total bytes used,
1192
				   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 */
1199 1200
	u64 bytes_readonly;	/* total bytes that are read only */

1201 1202 1203 1204
	u64 max_extent_size;	/* This will hold the maximum extent size of
				   the space info if we had an ENOSPC in the
				   allocator. */

1205 1206 1207 1208 1209 1210 1211 1212 1213
	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 */

1214
	u64 disk_used;		/* total bytes used on disk */
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1215 1216
	u64 disk_total;		/* total bytes on disk, takes mirrors into
				   account */
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1218 1219
	u64 flags;

1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231
	/*
	 * 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;

1232
	struct list_head list;
1233
	/* Protected by the spinlock 'lock'. */
1234
	struct list_head ro_bgs;
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1236
	struct rw_semaphore groups_sem;
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1237
	/* for block groups in our same type */
1238
	struct list_head block_groups[BTRFS_NR_RAID_TYPES];
1239
	wait_queue_head_t wait;
1240 1241

	struct kobject kobj;
1242
	struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES];
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1243 1244
};

1245 1246 1247 1248 1249 1250 1251 1252
#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

1253 1254 1255 1256 1257
struct btrfs_block_rsv {
	u64 size;
	u64 reserved;
	struct btrfs_space_info *space_info;
	spinlock_t lock;
1258 1259 1260
	unsigned short full;
	unsigned short type;
	unsigned short failfast;
1261 1262
};

1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
/*
 * 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;

1279 1280 1281
	/* We did a full search and couldn't create a cluster */
	bool fragmented;

1282 1283 1284 1285 1286 1287 1288
	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;
1289 1290
};

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1291 1292 1293
enum btrfs_caching_type {
	BTRFS_CACHE_NO		= 0,
	BTRFS_CACHE_STARTED	= 1,
1294 1295
	BTRFS_CACHE_FAST	= 2,
	BTRFS_CACHE_FINISHED	= 3,
1296
	BTRFS_CACHE_ERROR	= 4,
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};

1299 1300 1301 1302 1303 1304 1305
enum btrfs_disk_cache_state {
	BTRFS_DC_WRITTEN	= 0,
	BTRFS_DC_ERROR		= 1,
	BTRFS_DC_CLEAR		= 2,
	BTRFS_DC_SETUP		= 3,
};

1306 1307 1308 1309
struct btrfs_caching_control {
	struct list_head list;
	struct mutex mutex;
	wait_queue_head_t wait;
1310
	struct btrfs_work work;
1311 1312 1313 1314 1315
	struct btrfs_block_group_cache *block_group;
	u64 progress;
	atomic_t count;
};

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1316 1317 1318
/* Once caching_thread() finds this much free space, it will wake up waiters. */
#define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)

1319 1320 1321 1322 1323
struct btrfs_io_ctl {
	void *cur, *orig;
	struct page *page;
	struct page **pages;
	struct btrfs_root *root;
1324
	struct inode *inode;
1325 1326 1327
	unsigned long size;
	int index;
	int num_pages;
1328 1329
	int entries;
	int bitmaps;
1330 1331 1332
	unsigned check_crcs:1;
};

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struct btrfs_block_group_cache {
	struct btrfs_key key;
	struct btrfs_block_group_item item;
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1336
	struct btrfs_fs_info *fs_info;
1337
	struct inode *inode;
1338
	spinlock_t lock;
1339
	u64 pinned;
1340
	u64 reserved;
1341
	u64 delalloc_bytes;
1342
	u64 bytes_super;
1343
	u64 flags;
1344
	u64 cache_generation;
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357
	u32 sectorsize;

	/*
	 * If the free space extent count exceeds this number, convert the block
	 * group to bitmaps.
	 */
	u32 bitmap_high_thresh;

	/*
	 * If the free space extent count drops below this number, convert the
	 * block group back to extents.
	 */
	u32 bitmap_low_thresh;
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1359 1360 1361 1362 1363 1364 1365
	/*
	 * 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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1366 1367 1368
	/* for raid56, this is a full stripe, without parity */
	unsigned long full_stripe_len;

1369
	unsigned int ro;
1370
	unsigned int iref:1;
1371
	unsigned int has_caching_ctl:1;
1372
	unsigned int removed:1;
1373 1374

	int disk_cache_state;
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1376 1377
	/* cache tracking stuff */
	int cached;
1378 1379
	struct btrfs_caching_control *caching_ctl;
	u64 last_byte_to_unpin;
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1381 1382 1383
	struct btrfs_space_info *space_info;

	/* free space cache stuff */
1384
	struct btrfs_free_space_ctl *free_space_ctl;
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1385 1386 1387 1388 1389 1390

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

	/* for block groups in the same raid type */
	struct list_head list;
1391 1392 1393

	/* usage count */
	atomic_t count;
1394 1395 1396 1397 1398

	/* 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;
1399

1400 1401
	/* For delayed block group creation or deletion of empty block groups */
	struct list_head bg_list;
1402 1403 1404

	/* For read-only block groups */
	struct list_head ro_list;
1405 1406

	atomic_t trimming;
1407 1408 1409

	/* For dirty block groups */
	struct list_head dirty_list;
1410 1411 1412
	struct list_head io_list;

	struct btrfs_io_ctl io_ctl;
1413 1414 1415 1416 1417 1418 1419 1420 1421

	/* Lock for free space tree operations. */
	struct mutex free_space_lock;

	/*
	 * Does the block group need to be added to the free space tree?
	 * Protected by free_space_lock.
	 */
	int needs_free_space;
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};
1423

1424 1425 1426 1427 1428 1429
/* delayed seq elem */
struct seq_list {
	struct list_head list;
	u64 seq;
};

1430 1431
#define SEQ_LIST_INIT(name)	{ .list = LIST_HEAD_INIT((name).list), .seq = 0 }

1432 1433 1434 1435 1436
enum btrfs_orphan_cleanup_state {
	ORPHAN_CLEANUP_STARTED	= 1,
	ORPHAN_CLEANUP_DONE	= 2,
};

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1437 1438 1439 1440 1441 1442 1443 1444 1445
/* 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 {
1446 1447 1448 1449
	struct list_head stripe_cache;
	spinlock_t cache_lock;
	int cache_size;
	struct btrfs_stripe_hash table[];
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1450 1451 1452 1453
};

#define BTRFS_STRIPE_HASH_TABLE_BITS 11

1454 1455
void btrfs_init_async_reclaim_work(struct work_struct *work);

1456
/* fs_info */
1457
struct reloc_control;
1458
struct btrfs_device;
1459
struct btrfs_fs_devices;
1460
struct btrfs_balance_control;
1461
struct btrfs_delayed_root;
1462
struct btrfs_fs_info {
1463
	u8 fsid[BTRFS_FSID_SIZE];
1464
	u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1465 1466
	struct btrfs_root *extent_root;
	struct btrfs_root *tree_root;
1467 1468
	struct btrfs_root *chunk_root;
	struct btrfs_root *dev_root;
1469
	struct btrfs_root *fs_root;
1470
	struct btrfs_root *csum_root;
1471
	struct btrfs_root *quota_root;
1472
	struct btrfs_root *uuid_root;
1473
	struct btrfs_root *free_space_root;
1474 1475 1476

	/* the log root tree is a directory of all the other log roots */
	struct btrfs_root *log_root_tree;
1477 1478

	spinlock_t fs_roots_radix_lock;
1479
	struct radix_tree_root fs_roots_radix;
1480

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1481 1482
	/* block group cache stuff */
	spinlock_t block_group_cache_lock;
1483
	u64 first_logical_byte;
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1484 1485
	struct rb_root block_group_cache_tree;

1486 1487 1488 1489
	/* keep track of unallocated space */
	spinlock_t free_chunk_lock;
	u64 free_chunk_space;

1490 1491
	struct extent_io_tree freed_extents[2];
	struct extent_io_tree *pinned_extents;
1492

1493 1494 1495
	/* logical->physical extent mapping */
	struct btrfs_mapping_tree mapping_tree;

1496 1497 1498 1499
	/*
	 * block reservation for extent, checksum, root tree and
	 * delayed dir index item
	 */
1500 1501 1502 1503 1504 1505 1506
	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;
1507 1508
	/* block reservation for delayed operations */
	struct btrfs_block_rsv delayed_block_rsv;
1509 1510 1511

	struct btrfs_block_rsv empty_block_rsv;

1512
	u64 generation;
1513
	u64 last_trans_committed;
1514
	u64 avg_delayed_ref_runtime;
1515 1516 1517 1518 1519 1520

	/*
	 * 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;
1521
	unsigned long mount_opt;
1522 1523 1524 1525 1526
	/*
	 * Track requests for actions that need to be done during transaction
	 * commit (like for some mount options).
	 */
	unsigned long pending_changes;
1527
	unsigned long compress_type:4;
1528
	int commit_interval;
1529 1530 1531 1532 1533 1534
	/*
	 * 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.
	 */
1535
	u64 max_inline;
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Miao Xie 已提交
1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
	/*
	 * 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.
	 */
1546
	u64 alloc_start;
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1547
	struct btrfs_transaction *running_transaction;
1548
	wait_queue_head_t transaction_throttle;
1549
	wait_queue_head_t transaction_wait;
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Sage Weil 已提交
1550
	wait_queue_head_t transaction_blocked_wait;
1551
	wait_queue_head_t async_submit_wait;
1552

1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563
	/*
	 * 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;
1564 1565
	struct btrfs_super_block *super_copy;
	struct btrfs_super_block *super_for_commit;
1566
	struct block_device *__bdev;
C
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1567
	struct super_block *sb;
1568
	struct inode *btree_inode;
C
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1569
	struct backing_dev_info bdi;
1570
	struct mutex tree_log_mutex;
1571 1572
	struct mutex transaction_kthread_mutex;
	struct mutex cleaner_mutex;
1573
	struct mutex chunk_mutex;
1574
	struct mutex volume_mutex;
D
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1575

1576 1577 1578 1579 1580 1581
	/*
	 * 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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1582 1583 1584 1585 1586 1587
	/* 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;

1588 1589 1590 1591 1592 1593 1594 1595
	/*
	 * 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;
1596

1597
	struct rw_semaphore commit_root_sem;
1598

1599
	struct rw_semaphore cleanup_work_sem;
1600

1601
	struct rw_semaphore subvol_sem;
1602 1603
	struct srcu_struct subvol_srcu;

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1604
	spinlock_t trans_lock;
C
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1605 1606 1607 1608 1609 1610
	/*
	 * 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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1611
	struct list_head trans_list;
1612
	struct list_head dead_roots;
1613
	struct list_head caching_block_groups;
1614

Y
Yan, Zheng 已提交
1615 1616
	spinlock_t delayed_iput_lock;
	struct list_head delayed_iputs;
1617
	struct mutex cleaner_delayed_iput_mutex;
Y
Yan, Zheng 已提交
1618

J
Jan Schmidt 已提交
1619 1620
	/* this protects tree_mod_seq_list */
	spinlock_t tree_mod_seq_lock;
1621
	atomic64_t tree_mod_seq;
J
Jan Schmidt 已提交
1622 1623 1624 1625 1626 1627
	struct list_head tree_mod_seq_list;

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

1628
	atomic_t nr_async_submits;
1629
	atomic_t async_submit_draining;
1630
	atomic_t nr_async_bios;
1631
	atomic_t async_delalloc_pages;
J
Josef Bacik 已提交
1632
	atomic_t open_ioctl_trans;
1633

1634
	/*
1635
	 * this is used to protect the following list -- ordered_roots.
1636
	 */
1637
	spinlock_t ordered_root_lock;
1638 1639

	/*
1640 1641 1642
	 * all fs/file tree roots in which there are data=ordered extents
	 * pending writeback are added into this list.
	 *
1643 1644 1645
	 * these can span multiple transactions and basically include
	 * every dirty data page that isn't from nodatacow
	 */
1646
	struct list_head ordered_roots;
1647

1648
	struct mutex delalloc_root_mutex;
1649 1650 1651
	spinlock_t delalloc_root_lock;
	/* all fs/file tree roots that have delalloc inodes. */
	struct list_head delalloc_roots;
1652

1653 1654 1655 1656 1657 1658
	/*
	 * 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.
1659 1660 1661
	 *
	 * A third pool does submit_bio to avoid deadlocking with the other
	 * two
1662
	 */
1663 1664 1665 1666 1667 1668
	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;
1669
	struct btrfs_workqueue *endio_repair_workers;
1670 1671 1672 1673 1674 1675 1676
	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;
1677

1678 1679 1680 1681 1682
	/*
	 * 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
	 */
1683 1684
	struct btrfs_workqueue *fixup_workers;
	struct btrfs_workqueue *delayed_workers;
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1685 1686 1687

	/* the extent workers do delayed refs on the extent allocation tree */
	struct btrfs_workqueue *extent_workers;
1688 1689
	struct task_struct *transaction_kthread;
	struct task_struct *cleaner_kthread;
1690
	int thread_pool_size;
1691

1692
	struct kobject *space_info_kobj;
1693
	int do_barriers;
1694
	int closing;
1695
	int log_root_recovering;
1696
	int open;
1697

1698
	u64 total_pinned;
1699

1700 1701
	/* used to keep from writing metadata until there is a nice batch */
	struct percpu_counter dirty_metadata_bytes;
1702
	struct percpu_counter delalloc_bytes;
1703
	s32 dirty_metadata_batch;
1704 1705
	s32 delalloc_batch;

1706 1707
	struct list_head dirty_cowonly_roots;

1708
	struct btrfs_fs_devices *fs_devices;
1709 1710 1711 1712 1713 1714

	/*
	 * 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.
	 */
1715
	struct list_head space_info;
1716

1717 1718
	struct btrfs_space_info *data_sinfo;

1719 1720
	struct reloc_control *reloc_ctl;

1721 1722 1723 1724 1725
	/* 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
1726

C
Chris Mason 已提交
1727 1728 1729 1730 1731
	/* auto defrag inodes go here */
	spinlock_t defrag_inodes_lock;
	struct rb_root defrag_inodes;
	atomic_t defrag_running;

1732 1733
	/* Used to protect avail_{data, metadata, system}_alloc_bits */
	seqlock_t profiles_lock;
1734 1735 1736 1737 1738
	/*
	 * 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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1739 1740 1741
	u64 avail_data_alloc_bits;
	u64 avail_metadata_alloc_bits;
	u64 avail_system_alloc_bits;
1742

1743 1744 1745
	/* restriper state */
	spinlock_t balance_lock;
	struct mutex balance_mutex;
1746 1747
	atomic_t balance_running;
	atomic_t balance_pause_req;
1748
	atomic_t balance_cancel_req;
1749
	struct btrfs_balance_control *balance_ctl;
1750
	wait_queue_head_t balance_wait_q;
1751

1752 1753 1754
	unsigned data_chunk_allocations;
	unsigned metadata_ratio;

1755
	void *bdev_holder;
L
liubo 已提交
1756

A
Arne Jansen 已提交
1757 1758 1759 1760 1761 1762 1763 1764
	/* 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;
1765 1766 1767
	struct btrfs_workqueue *scrub_workers;
	struct btrfs_workqueue *scrub_wr_completion_workers;
	struct btrfs_workqueue *scrub_nocow_workers;
1768
	struct btrfs_workqueue *scrub_parity_workers;
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Arne Jansen 已提交
1769

1770 1771 1772
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
	u32 check_integrity_print_mask;
#endif
1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788
	/*
	 * 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
1789
	struct rb_root qgroup_op_tree;
1790
	spinlock_t qgroup_lock;
J
Josef Bacik 已提交
1791 1792
	spinlock_t qgroup_op_lock;
	atomic_t qgroup_op_seq;
1793

1794 1795 1796 1797 1798 1799
	/*
	 * used to avoid frequently calling ulist_alloc()/ulist_free()
	 * when doing qgroup accounting, it must be protected by qgroup_lock.
	 */
	struct ulist *qgroup_ulist;

1800 1801 1802
	/* protect user change for quota operations */
	struct mutex qgroup_ioctl_lock;

1803 1804 1805
	/* list of dirty qgroups to be written at next commit */
	struct list_head dirty_qgroups;

1806
	/* used by qgroup for an efficient tree traversal */
1807
	u64 qgroup_seq;
1808

J
Jan Schmidt 已提交
1809 1810 1811
	/* qgroup rescan items */
	struct mutex qgroup_rescan_lock; /* protects the progress item */
	struct btrfs_key qgroup_rescan_progress;
1812
	struct btrfs_workqueue *qgroup_rescan_workers;
1813
	struct completion qgroup_rescan_completion;
1814
	struct btrfs_work qgroup_rescan_work;
J
Jan Schmidt 已提交
1815

L
liubo 已提交
1816
	/* filesystem state */
1817
	unsigned long fs_state;
1818 1819

	struct btrfs_delayed_root *delayed_root;
C
Chris Mason 已提交
1820

1821 1822 1823
	/* readahead tree */
	spinlock_t reada_lock;
	struct radix_tree_root reada_tree;
1824

1825 1826 1827 1828
	/* Extent buffer radix tree */
	spinlock_t buffer_lock;
	struct radix_tree_root buffer_radix;

C
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1829 1830
	/* next backup root to be overwritten */
	int backup_root_index;
1831 1832

	int num_tolerated_disk_barrier_failures;
1833 1834 1835

	/* device replace state */
	struct btrfs_dev_replace dev_replace;
1836 1837

	atomic_t mutually_exclusive_operation_running;
S
Stefan Behrens 已提交
1838

1839 1840 1841
	struct percpu_counter bio_counter;
	wait_queue_head_t replace_wait;

S
Stefan Behrens 已提交
1842
	struct semaphore uuid_tree_rescan_sem;
1843
	unsigned int update_uuid_tree_gen:1;
1844 1845 1846

	/* Used to reclaim the metadata space in the background. */
	struct work_struct async_reclaim_work;
1847 1848 1849

	spinlock_t unused_bgs_lock;
	struct list_head unused_bgs;
1850
	struct mutex unused_bg_unpin_mutex;
1851
	struct mutex delete_unused_bgs_mutex;
1852 1853 1854

	/* For btrfs to record security options */
	struct security_mnt_opts security_opts;
1855 1856 1857 1858 1859 1860

	/*
	 * 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;
1861 1862

	int creating_free_space_tree;
1863
};
1864

1865 1866 1867 1868 1869
struct btrfs_subvolume_writers {
	struct percpu_counter	counter;
	wait_queue_head_t	wait;
};

1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888
/*
 * 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
1889
#define BTRFS_ROOT_DIRTY		9
1890

1891 1892
/*
 * in ram representation of the tree.  extent_root is used for all allocations
1893
 * and for the extent tree extent_root root.
1894 1895
 */
struct btrfs_root {
1896
	struct extent_buffer *node;
1897

1898
	struct extent_buffer *commit_root;
1899
	struct btrfs_root *log_root;
Z
Zheng Yan 已提交
1900
	struct btrfs_root *reloc_root;
Y
Yan Zheng 已提交
1901

1902
	unsigned long state;
1903 1904
	struct btrfs_root_item root_item;
	struct btrfs_key root_key;
1905
	struct btrfs_fs_info *fs_info;
1906 1907
	struct extent_io_tree dirty_log_pages;

1908
	struct mutex objectid_mutex;
Y
Yan Zheng 已提交
1909

1910 1911 1912
	spinlock_t accounting_lock;
	struct btrfs_block_rsv *block_rsv;

1913 1914
	/* free ino cache stuff */
	struct btrfs_free_space_ctl *free_ino_ctl;
1915 1916 1917
	enum btrfs_caching_type ino_cache_state;
	spinlock_t ino_cache_lock;
	wait_queue_head_t ino_cache_wait;
1918
	struct btrfs_free_space_ctl *free_ino_pinned;
1919 1920
	u64 ino_cache_progress;
	struct inode *ino_cache_inode;
1921

1922
	struct mutex log_mutex;
Y
Yan Zheng 已提交
1923 1924
	wait_queue_head_t log_writer_wait;
	wait_queue_head_t log_commit_wait[2];
1925
	struct list_head log_ctxs[2];
Y
Yan Zheng 已提交
1926 1927
	atomic_t log_writers;
	atomic_t log_commit[2];
M
Miao Xie 已提交
1928
	atomic_t log_batch;
1929
	int log_transid;
1930 1931 1932
	/* No matter the commit succeeds or not*/
	int log_transid_committed;
	/* Just be updated when the commit succeeds. */
1933
	int last_log_commit;
1934
	pid_t log_start_pid;
1935

1936 1937
	u64 objectid;
	u64 last_trans;
1938 1939 1940 1941 1942 1943 1944

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

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

1945 1946
	u32 stripesize;

1947
	u32 type;
1948 1949

	u64 highest_objectid;
C
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1950

1951
	/* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
1952 1953
	u64 alloc_bytenr;

1954
	u64 defrag_trans_start;
1955
	struct btrfs_key defrag_progress;
C
Chris Mason 已提交
1956
	struct btrfs_key defrag_max;
1957
	char *name;
1958 1959 1960

	/* the dirty list is only used by non-reference counted roots */
	struct list_head dirty_list;
1961

1962 1963
	struct list_head root_list;

1964 1965 1966
	spinlock_t log_extents_lock[2];
	struct list_head logged_list[2];

1967
	spinlock_t orphan_lock;
1968
	atomic_t orphan_inodes;
1969 1970
	struct btrfs_block_rsv *orphan_block_rsv;
	int orphan_cleanup_state;
1971

1972 1973 1974 1975
	spinlock_t inode_lock;
	/* red-black tree that keeps track of in-memory inodes */
	struct rb_root inode_tree;

1976 1977 1978 1979 1980
	/*
	 * radix tree that keeps track of delayed nodes of every inode,
	 * protected by inode_lock
	 */
	struct radix_tree_root delayed_nodes_tree;
1981 1982 1983 1984
	/*
	 * right now this just gets used so that a root has its own devid
	 * for stat.  It may be used for more later
	 */
1985
	dev_t anon_dev;
1986

1987
	spinlock_t root_item_lock;
1988
	atomic_t refs;
1989

1990
	struct mutex delalloc_mutex;
1991 1992 1993 1994 1995 1996 1997 1998 1999
	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;
2000 2001

	struct mutex ordered_extent_mutex;
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015
	/*
	 * 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;
2016 2017 2018 2019 2020 2021

	/*
	 * Number of currently running SEND ioctls to prevent
	 * manipulation with the read-only status via SUBVOL_SETFLAGS
	 */
	int send_in_progress;
2022 2023
	struct btrfs_subvolume_writers *subv_writers;
	atomic_t will_be_snapshoted;
2024 2025 2026

	/* For qgroup metadata space reserve */
	atomic_t qgroup_meta_rsv;
2027 2028
};

C
Chris Mason 已提交
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060
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
2061 2062 2063 2064 2065
/*
 * 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
2066
#define BTRFS_INODE_ITEM_KEY		1
2067
#define BTRFS_INODE_REF_KEY		12
M
Mark Fasheh 已提交
2068
#define BTRFS_INODE_EXTREF_KEY		13
2069 2070
#define BTRFS_XATTR_ITEM_KEY		24
#define BTRFS_ORPHAN_ITEM_KEY		48
C
Chris Mason 已提交
2071
/* reserve 2-15 close to the inode for later flexibility */
C
Chris Mason 已提交
2072 2073 2074 2075 2076

/*
 * dir items are the name -> inode pointers in a directory.  There is one
 * for every name in a directory.
 */
2077 2078 2079 2080
#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
2081
/*
C
Chris Mason 已提交
2082
 * extent data is for file data
C
Chris Mason 已提交
2083
 */
2084
#define BTRFS_EXTENT_DATA_KEY	108
2085

C
Chris Mason 已提交
2086
/*
2087 2088
 * extent csums are stored in a separate tree and hold csums for
 * an entire extent on disk.
C
Chris Mason 已提交
2089
 */
2090
#define BTRFS_EXTENT_CSUM_KEY	128
C
Chris Mason 已提交
2091

C
Chris Mason 已提交
2092
/*
W
Wu Fengguang 已提交
2093
 * root items point to tree roots.  They are typically in the root
C
Chris Mason 已提交
2094 2095
 * tree used by the super block to find all the other trees
 */
2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110
#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
2111 2112 2113 2114
/*
 * extent items are in the extent map tree.  These record which blocks
 * are used, and how many references there are to each block
 */
2115
#define BTRFS_EXTENT_ITEM_KEY	168
2116

2117 2118 2119 2120 2121 2122
/*
 * 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

2123 2124 2125 2126 2127 2128 2129 2130 2131
#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
2132 2133 2134 2135 2136

/*
 * block groups give us hints into the extent allocation trees.  Which
 * blocks are free etc etc
 */
2137
#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
2138

2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159
/*
 * Every block group is represented in the free space tree by a free space info
 * item, which stores some accounting information. It is keyed on
 * (block_group_start, FREE_SPACE_INFO, block_group_length).
 */
#define BTRFS_FREE_SPACE_INFO_KEY 198

/*
 * A free space extent tracks an extent of space that is free in a block group.
 * It is keyed on (start, FREE_SPACE_EXTENT, length).
 */
#define BTRFS_FREE_SPACE_EXTENT_KEY 199

/*
 * When a block group becomes very fragmented, we convert it to use bitmaps
 * instead of extents. A free space bitmap is keyed on
 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
 * (length / sectorsize) bits.
 */
#define BTRFS_FREE_SPACE_BITMAP_KEY 200

2160 2161 2162
#define BTRFS_DEV_EXTENT_KEY	204
#define BTRFS_DEV_ITEM_KEY	216
#define BTRFS_CHUNK_ITEM_KEY	228
2163

A
Arne Jansen 已提交
2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187
/*
 * 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

2188 2189
#define BTRFS_BALANCE_ITEM_KEY	248

2190 2191 2192 2193 2194 2195
/*
 * 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

2196 2197 2198 2199 2200 2201
/*
 * 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

2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
/*
 * 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
2215 2216 2217 2218
/*
 * string items are for debugging.  They just store a short string of
 * data in the FS
 */
C
Chris Mason 已提交
2219 2220
#define BTRFS_STRING_ITEM_KEY	253

2221 2222 2223 2224 2225
/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */
2226 2227 2228
#define BTRFS_MOUNT_NODATASUM		(1 << 0)
#define BTRFS_MOUNT_NODATACOW		(1 << 1)
#define BTRFS_MOUNT_NOBARRIER		(1 << 2)
2229
#define BTRFS_MOUNT_SSD			(1 << 3)
2230
#define BTRFS_MOUNT_DEGRADED		(1 << 4)
C
Chris Mason 已提交
2231
#define BTRFS_MOUNT_COMPRESS		(1 << 5)
S
Sage Weil 已提交
2232
#define BTRFS_MOUNT_NOTREELOG           (1 << 6)
2233
#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
2234
#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)
C
Chris Mason 已提交
2235
#define BTRFS_MOUNT_NOSSD		(1 << 9)
C
Christoph Hellwig 已提交
2236
#define BTRFS_MOUNT_DISCARD		(1 << 10)
C
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2237
#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)
2238
#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)
2239
#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)
2240
#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)
2241
#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)
C
Chris Mason 已提交
2242
#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)
C
Chris Mason 已提交
2243
#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)
C
Chris Mason 已提交
2244
#define BTRFS_MOUNT_RECOVERY		(1 << 18)
2245
#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)
2246 2247
#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
J
Jeff Mahoney 已提交
2248
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)
2249
#define BTRFS_MOUNT_RESCAN_UUID_TREE	(1 << 23)
2250 2251
#define BTRFS_MOUNT_FRAGMENT_DATA	(1 << 24)
#define BTRFS_MOUNT_FRAGMENT_METADATA	(1 << 25)
2252
#define BTRFS_MOUNT_FREE_SPACE_TREE	(1 << 26)
2253

2254
#define BTRFS_DEFAULT_COMMIT_INTERVAL	(30)
2255
#define BTRFS_DEFAULT_MAX_INLINE	(8192)
2256

2257 2258
#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
2259
#define btrfs_raw_test_opt(o, opt)	((o) & BTRFS_MOUNT_##opt)
2260 2261
#define btrfs_test_opt(root, opt)	((root)->fs_info->mount_opt & \
					 BTRFS_MOUNT_##opt)
2262

2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
#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);			\
}

2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288
#ifdef CONFIG_BTRFS_DEBUG
static inline int
btrfs_should_fragment_free_space(struct btrfs_root *root,
				 struct btrfs_block_group_cache *block_group)
{
	return (btrfs_test_opt(root, FRAGMENT_METADATA) &&
		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
	       (btrfs_test_opt(root, FRAGMENT_DATA) &&
		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
}
#endif

2289 2290 2291 2292 2293 2294 2295 2296
/*
 * 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)
 */

2297 2298
#define BTRFS_PENDING_SET_INODE_MAP_CACHE	(0)
#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE	(1)
2299
#define BTRFS_PENDING_COMMIT			(2)
2300

2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331
#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
2332 2333 2334
/*
 * Inode flags
 */
Y
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2335 2336 2337
#define BTRFS_INODE_NODATASUM		(1 << 0)
#define BTRFS_INODE_NODATACOW		(1 << 1)
#define BTRFS_INODE_READONLY		(1 << 2)
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#define BTRFS_INODE_NOCOMPRESS		(1 << 3)
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#define BTRFS_INODE_PREALLOC		(1 << 4)
2340 2341 2342 2343 2344 2345
#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)
2346
#define BTRFS_INODE_COMPRESS		(1 << 11)
2347

2348 2349
#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)

2350 2351 2352 2353 2354 2355
struct btrfs_map_token {
	struct extent_buffer *eb;
	char *kaddr;
	unsigned long offset;
};

2356 2357 2358
#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
				((bytes) >> (fs_info)->sb->s_blocksize_bits)

2359 2360
static inline void btrfs_init_map_token (struct btrfs_map_token *token)
{
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	token->kaddr = NULL;
2362 2363
}

2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383
/* some macros to generate set/get funcs for the struct fields.  This
 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
 * one for u8:
 */
#define le8_to_cpu(v) (v)
#define cpu_to_le8(v) (v)
#define __le8 u8

#define read_eb_member(eb, ptr, type, member, result) (			\
	read_extent_buffer(eb, (char *)(result),			\
			   ((unsigned long)(ptr)) +			\
			    offsetof(type, member),			\
			   sizeof(((type *)0)->member)))

#define write_eb_member(eb, ptr, type, member, result) (		\
	write_extent_buffer(eb, (char *)(result),			\
			   ((unsigned long)(ptr)) +			\
			    offsetof(type, member),			\
			   sizeof(((type *)0)->member)))

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#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)

2407
#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
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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); \
}
2432 2433 2434 2435

#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)		\
{									\
2436
	type *p = page_address(eb->pages[0]);				\
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	u##bits res = le##bits##_to_cpu(p->member);			\
2438
	return res;							\
2439 2440 2441 2442
}									\
static inline void btrfs_set_##name(struct extent_buffer *eb,		\
				    u##bits val)			\
{									\
2443
	type *p = page_address(eb->pages[0]);				\
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	p->member = cpu_to_le##bits(val);				\
2445
}
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#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(type *s)				\
{									\
	return le##bits##_to_cpu(s->member);				\
}									\
static inline void btrfs_set_##name(type *s, u##bits val)		\
{									\
	s->member = cpu_to_le##bits(val);				\
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}

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BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
2462 2463
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
2464 2465
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
2466 2467 2468
BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
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BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
2470

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BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
			 total_bytes, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
			 bytes_used, 64);
BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
			 io_align, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
			 io_width, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
			 sector_size, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
2483 2484 2485 2486 2487 2488
BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
			 dev_group, 32);
BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
			 seek_speed, 8);
BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
			 bandwidth, 8);
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BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);
2491

2492
static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
2493
{
2494
	return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
2495 2496
}

2497
static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
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{
2499
	return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
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}

2502
BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
2503 2504 2505 2506 2507 2508 2509
BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
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BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
2511 2512 2513
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);

2514 2515 2516 2517 2518 2519
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);
2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531
BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
			 stripe_len, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
			 io_align, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
			 io_width, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
			 sector_size, 32);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
			 num_stripes, 16);
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BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
			 sub_stripes, 16);
2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545
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;
}

2546 2547 2548 2549 2550
static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
{
	return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
}

2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562
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));
}

2563 2564 2565 2566 2567
/* 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);
2568 2569
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);
2570 2571

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
2572 2573 2574 2575 2576
		   struct btrfs_block_group_item, chunk_objectid, 64);
BTRFS_SETGET_FUNCS(disk_block_group_flags,
		   struct btrfs_block_group_item, flags, 64);
BTRFS_SETGET_STACK_FUNCS(block_group_flags,
			struct btrfs_block_group_item, flags, 64);
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/* struct btrfs_free_space_info */
BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
		   extent_count, 32);
BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);

2583 2584
/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
2585
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
2586

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/* struct btrfs_inode_extref */
BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
		   parent_objectid, 64);
BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
		   name_len, 16);
BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);

2594 2595
/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
2596
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
2597
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
2598
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
2599
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
2600 2601 2602 2603 2604
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);
2605
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
2606
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623
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);
2624 2625
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
2626 2627
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
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2629
/* struct btrfs_dev_extent */
2630 2631 2632 2633 2634 2635
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);
2636 2637
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);

2638
static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
2639 2640
{
	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
2641
	return (unsigned long)dev + ptr;
2642 2643
}

2644 2645 2646 2647
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);
2648

2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666
BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);


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

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

static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
					    struct btrfs_tree_block_info *item,
					    struct btrfs_disk_key *key)
{
	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
}
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BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
		   root, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
		   objectid, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
		   offset, 64);
BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
		   count, 32);

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

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

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

BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
		   generation, 64);
BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
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2706 2707
/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
2708
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
2709 2710 2711 2712
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
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2714
static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2715
{
2716 2717 2718 2719
	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
2720 2721
}

2722 2723
static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
					   int nr, u64 val)
C
Chris Mason 已提交
2724
{
2725 2726 2727 2728
	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
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2729 2730
}

2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747
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);
}

2748
static inline unsigned long btrfs_node_key_ptr_offset(int nr)
2749
{
2750 2751
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
2752 2753
}

2754 2755 2756
void btrfs_node_key(struct extent_buffer *eb,
		    struct btrfs_disk_key *disk_key, int nr);

2757 2758
static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
2759
{
2760 2761 2762 2763
	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);
2764 2765
}

2766 2767 2768
/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
2769 2770
BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
2771

2772
static inline unsigned long btrfs_item_nr_offset(int nr)
2773
{
2774 2775
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
2776 2777
}

2778
static inline struct btrfs_item *btrfs_item_nr(int nr)
C
Chris Mason 已提交
2779
{
2780
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
C
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2781 2782
}

2783 2784
static inline u32 btrfs_item_end(struct extent_buffer *eb,
				 struct btrfs_item *item)
C
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2785
{
2786
	return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
C
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2787 2788
}

2789
static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
C
Chris Mason 已提交
2790
{
2791
	return btrfs_item_end(eb, btrfs_item_nr(nr));
C
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2792 2793
}

2794
static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
C
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2795
{
2796
	return btrfs_item_offset(eb, btrfs_item_nr(nr));
C
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2797 2798
}

2799
static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
C
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2800
{
2801
	return btrfs_item_size(eb, btrfs_item_nr(nr));
C
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2802 2803
}

2804 2805
static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
2806
{
2807
	struct btrfs_item *item = btrfs_item_nr(nr);
2808
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
2809 2810
}

2811 2812
static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
2813
{
2814
	struct btrfs_item *item = btrfs_item_nr(nr);
2815
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
2816 2817
}

2818 2819
BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);

2820 2821 2822 2823 2824 2825 2826
/*
 * 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);

2827
/* struct btrfs_dir_item */
J
Josef Bacik 已提交
2828
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
2829 2830
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
2831
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
2832 2833 2834 2835 2836 2837 2838
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);
2839

2840 2841 2842
static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
2843
{
2844
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
2845 2846
}

2847 2848 2849
static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
2850
{
2851
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
2852 2853
}

2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874
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);
}

2875 2876 2877 2878 2879
/* 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);
2880

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2881 2882 2883 2884
static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
2885
	cpu->type = disk->type;
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2886 2887 2888 2889 2890 2891 2892
	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);
2893
	disk->type = cpu->type;
C
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2894 2895 2896
	disk->objectid = cpu_to_le64(cpu->objectid);
}

2897 2898
static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2899
{
2900 2901 2902
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2903 2904
}

2905 2906
static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
2907
{
2908 2909 2910
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
2911 2912
}

2913 2914 2915
static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
2916
{
2917 2918 2919
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
2920 2921
}

2922

2923
static inline u8 btrfs_key_type(struct btrfs_key *key)
2924
{
2925
	return key->type;
2926 2927
}

2928
static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
2929
{
2930
	key->type = val;
2931 2932
}

2933
/* struct btrfs_header */
2934
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2935 2936 2937 2938
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);
2939
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2940
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2941 2942 2943 2944 2945 2946
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);
2947

2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966
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;
}

2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981
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);
}

2982
static inline unsigned long btrfs_header_fsid(void)
2983
{
2984
	return offsetof(struct btrfs_header, fsid);
2985 2986
}

2987
static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2988
{
2989
	return offsetof(struct btrfs_header, chunk_tree_uuid);
2990 2991
}

2992
static inline int btrfs_is_leaf(struct extent_buffer *eb)
2993
{
C
Chris Mason 已提交
2994
	return btrfs_header_level(eb) == 0;
2995 2996
}

2997
/* struct btrfs_root_item */
2998 2999
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
3000
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
3001 3002
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
3003

3004 3005
BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
3006 3007
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
3008 3009
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);
3010
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
3011 3012
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
3013 3014
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
3015 3016 3017 3018 3019 3020 3021 3022 3023 3024
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
3025

L
Li Zefan 已提交
3026 3027
static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
3028
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
L
Li Zefan 已提交
3029 3030
}

3031 3032 3033 3034 3035
static inline bool btrfs_root_dead(struct btrfs_root *root)
{
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0;
}

C
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3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084
/* 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);

3085 3086
/* struct btrfs_balance_item */
BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
3087

3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144
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);
3145
	cpu->limit = le64_to_cpu(disk->limit);
3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162
}

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);
3163
	disk->limit = cpu_to_le64(cpu->limit);
3164 3165 3166
}

/* struct btrfs_super_block */
3167
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
3168
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
3169 3170 3171
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
3172 3173
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
3174 3175
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
3176 3177
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
3178 3179 3180
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,
3181 3182 3183
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
3184 3185
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
3186 3187
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
3188 3189 3190 3191
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);
3192 3193 3194 3195
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
			 sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
			 nodesize, 32);
3196 3197
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
3198 3199
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
3200 3201
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
3202 3203 3204
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,
3205
			 compat_ro_flags, 64);
3206 3207
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
3208 3209
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
3210 3211
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
3212
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
3213 3214
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
			 uuid_tree_generation, 64);
3215 3216 3217

static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
D
David Sterba 已提交
3218 3219 3220 3221
	u16 t = btrfs_super_csum_type(s);
	/*
	 * csum type is validated at mount time
	 */
3222 3223
	return btrfs_csum_sizes[t];
}
3224

3225
static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
3226
{
3227
	return offsetof(struct btrfs_leaf, items);
3228 3229
}

3230 3231
/* struct btrfs_file_extent_item */
BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
3232 3233 3234 3235 3236 3237 3238 3239
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);
3240 3241 3242 3243
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);
3244

C
Chris Mason 已提交
3245 3246
static inline unsigned long
btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
3247
{
3248
	return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
3249 3250 3251 3252
}

static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
{
3253
	return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize;
3254 3255
}

3256 3257
BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
3258 3259
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
3260 3261
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
3262 3263
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
3264 3265
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
C
Chris Mason 已提交
3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282
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)
{
3283
	return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
C
Chris Mason 已提交
3284
}
3285

3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311
/* 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);
}


3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335
/* 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
3336 3337 3338 3339 3340 3341 3342
/* 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
3343 3344
BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
		   rescan, 64);
A
Arne Jansen 已提交
3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378

/* 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);

3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421
/* 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);

3422
static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
C
Chris Mason 已提交
3423 3424 3425 3426
{
	return sb->s_fs_info;
}

3427 3428
/* helper function to cast into the data area of the leaf. */
#define btrfs_item_ptr(leaf, slot, type) \
C
Chris Mason 已提交
3429
	((type *)(btrfs_leaf_data(leaf) + \
3430 3431 3432 3433 3434
	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)))
3435

3436 3437 3438 3439 3440 3441
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));
}

3442 3443
static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
3444
	return mapping_gfp_constraint(mapping, ~__GFP_FS);
3445 3446
}

C
Chris Mason 已提交
3447
/* extent-tree.c */
3448 3449 3450

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

3451
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
3452
						 unsigned num_items)
3453
{
3454
	return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
3455
		2 * num_items;
3456 3457 3458 3459 3460 3461 3462 3463 3464
}

/*
 * 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)
{
3465
	return root->nodesize * BTRFS_MAX_LEVEL * num_items;
3466 3467
}

3468 3469
int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3470 3471
int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3472
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3473 3474
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, unsigned long count);
C
Chris Mason 已提交
3475 3476
int btrfs_async_run_delayed_refs(struct btrfs_root *root,
				 unsigned long count, int wait);
3477
int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len);
3478 3479
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root, u64 bytenr,
3480
			     u64 offset, int metadata, u64 *refs, u64 *flags);
3481 3482
int btrfs_pin_extent(struct btrfs_root *root,
		     u64 bytenr, u64 num, int reserved);
3483
int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
3484
				    u64 bytenr, u64 num_bytes);
3485 3486
int btrfs_exclude_logged_extents(struct btrfs_root *root,
				 struct extent_buffer *eb);
Y
Yan Zheng 已提交
3487
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
3488 3489
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
C
Chris Mason 已提交
3490 3491 3492
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
3493
void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
3494
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
3495
int get_block_group_index(struct btrfs_block_group_cache *cache);
3496 3497 3498
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
					struct btrfs_root *root, u64 parent,
					u64 root_objectid,
3499
					struct btrfs_disk_key *key, int level,
3500
					u64 hint, u64 empty_size);
3501 3502 3503
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
3504
			   u64 parent, int last_ref);
3505 3506 3507
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
				     struct btrfs_root *root,
				     u64 root_objectid, u64 owner,
3508 3509
				     u64 offset, u64 ram_bytes,
				     struct btrfs_key *ins);
3510 3511 3512 3513
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);
3514 3515
int btrfs_reserve_extent(struct btrfs_root *root, u64 num_bytes,
			 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
3516
			 struct btrfs_key *ins, int is_data, int delalloc);
3517
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3518
		  struct extent_buffer *buf, int full_backref);
3519
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
3520
		  struct extent_buffer *buf, int full_backref);
3521 3522 3523
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_root *root,
				u64 bytenr, u64 num_bytes, u64 flags,
3524
				int level, int is_data);
Z
Zheng Yan 已提交
3525 3526
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_root *root,
A
Arne Jansen 已提交
3527
		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
3528
		      u64 owner, u64 offset);
3529

3530 3531
int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len,
			       int delalloc);
3532 3533
int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root,
				       u64 start, u64 len);
3534 3535
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				 struct btrfs_root *root);
C
Chris Mason 已提交
3536
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
3537
			       struct btrfs_root *root);
C
Chris Mason 已提交
3538
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
Z
Zheng Yan 已提交
3539 3540
			 struct btrfs_root *root,
			 u64 bytenr, u64 num_bytes, u64 parent,
3541
			 u64 root_objectid, u64 owner, u64 offset);
3542

3543 3544
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root);
C
Chris Mason 已提交
3545 3546
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				    struct btrfs_root *root);
3547 3548
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root);
3549
int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr);
C
Chris Mason 已提交
3550 3551
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_root *root);
3552
int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr);
3553 3554
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root, u64 bytes_used,
3555
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
3556
			   u64 size);
3557
struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
3558 3559
				struct btrfs_fs_info *fs_info,
				const u64 chunk_offset);
Z
Zheng Yan 已提交
3560
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
3561 3562
			     struct btrfs_root *root, u64 group_start,
			     struct extent_map *em);
3563
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
3564 3565
void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
3566 3567
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
				       struct btrfs_root *root);
3568
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
3569
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
M
Miao Xie 已提交
3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581

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,
};

3582
int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
3583
int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
3584
void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
3585 3586
void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
					    u64 len);
3587 3588
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				struct btrfs_root *root);
3589
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
3590 3591 3592
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
3593 3594 3595
int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
				     struct btrfs_block_rsv *rsv,
				     int nitems,
3596
				     u64 *qgroup_reserved, bool use_global_rsv);
3597 3598 3599
void btrfs_subvolume_release_metadata(struct btrfs_root *root,
				      struct btrfs_block_rsv *rsv,
				      u64 qgroup_reserved);
3600 3601
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
3602 3603
int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
3604 3605 3606
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);
3607 3608
void btrfs_free_block_rsv(struct btrfs_root *root,
			  struct btrfs_block_rsv *rsv);
3609
void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
3610
int btrfs_block_rsv_add(struct btrfs_root *root,
M
Miao Xie 已提交
3611 3612
			struct btrfs_block_rsv *block_rsv, u64 num_bytes,
			enum btrfs_reserve_flush_enum flush);
3613
int btrfs_block_rsv_check(struct btrfs_root *root,
3614 3615
			  struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
M
Miao Xie 已提交
3616 3617
			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,
			   enum btrfs_reserve_flush_enum flush);
3618 3619 3620
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv,
			    u64 num_bytes);
3621 3622 3623
int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *dest, u64 num_bytes,
			     int min_factor);
3624 3625 3626
void btrfs_block_rsv_release(struct btrfs_root *root,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
3627
int btrfs_inc_block_group_ro(struct btrfs_root *root,
3628
			     struct btrfs_block_group_cache *cache);
3629
void btrfs_dec_block_group_ro(struct btrfs_root *root,
3630
			      struct btrfs_block_group_cache *cache);
3631
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
3632
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
L
liubo 已提交
3633 3634
int btrfs_error_unpin_extent_range(struct btrfs_root *root,
				   u64 start, u64 end);
3635 3636
int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,
			 u64 num_bytes, u64 *actual_bytes);
3637 3638
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root, u64 type);
3639
int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range);
L
liubo 已提交
3640

3641
int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
3642 3643
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
					 struct btrfs_fs_info *fs_info);
3644
int __get_raid_index(u64 flags);
3645 3646
int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
3647
void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
3648 3649
void check_system_chunk(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
3650
			const u64 type);
3651 3652 3653
u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
		       struct btrfs_fs_info *info, u64 start, u64 end);

C
Chris Mason 已提交
3654
/* ctree.c */
3655 3656 3657
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);
3658 3659 3660
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
3661 3662
int btrfs_previous_extent_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid);
3663 3664
void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
			     struct btrfs_path *path,
3665
			     struct btrfs_key *new_key);
3666 3667
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
3668
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
3669
			struct btrfs_key *key, int lowest_level,
3670
			u64 min_trans);
3671
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
3672
			 struct btrfs_path *path,
3673
			 u64 min_trans);
3674 3675 3676 3677
enum btrfs_compare_tree_result {
	BTRFS_COMPARE_TREE_NEW,
	BTRFS_COMPARE_TREE_DELETED,
	BTRFS_COMPARE_TREE_CHANGED,
3678
	BTRFS_COMPARE_TREE_SAME,
3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689
};
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);
3690 3691 3692
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
3693
		    struct extent_buffer **cow_ret);
3694 3695 3696 3697
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);
3698 3699
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
3700
void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
3701
		       u32 data_size);
3702
void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
3703
			 u32 new_size, int from_end);
3704 3705 3706 3707 3708
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
3709 3710 3711 3712
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
3713 3714
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);
3715 3716 3717
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
3718 3719
int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
			  struct btrfs_path *p, u64 time_seq);
3720 3721 3722
int btrfs_search_slot_for_read(struct btrfs_root *root,
			       struct btrfs_key *key, struct btrfs_path *p,
			       int find_higher, int return_any);
3723
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
3724
		       struct btrfs_root *root, struct extent_buffer *parent,
3725
		       int start_slot, u64 *last_ret,
3726
		       struct btrfs_key *progress);
3727
void btrfs_release_path(struct btrfs_path *p);
C
Chris Mason 已提交
3728 3729
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
3730
void btrfs_set_path_blocking(struct btrfs_path *p);
3731
void btrfs_clear_path_blocking(struct btrfs_path *p,
3732
			       struct extent_buffer *held, int held_rw);
3733 3734
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

3735 3736 3737 3738 3739 3740 3741 3742 3743
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);
}

3744
void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
3745 3746
			    struct btrfs_key *cpu_key, u32 *data_size,
			    u32 total_data, u32 total_size, int nr);
3747 3748
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762
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
3763
int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
3764
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
J
Jan Schmidt 已提交
3765 3766
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
			u64 time_seq);
3767 3768
static inline int btrfs_next_old_item(struct btrfs_root *root,
				      struct btrfs_path *p, u64 time_seq)
3769 3770 3771
{
	++p->slots[0];
	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
3772
		return btrfs_next_old_leaf(root, p, time_seq);
3773 3774
	return 0;
}
3775 3776 3777 3778
static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
	return btrfs_next_old_item(root, p, 0);
}
3779
int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
3780 3781 3782
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
3783 3784 3785 3786
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);
3787 3788 3789 3790 3791 3792 3793 3794
static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
	 * Get synced with close_ctree()
	 */
	smp_mb();
	return fs_info->closing;
}
3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806

/*
 * 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));
}

3807 3808
static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
3809
	kfree(fs_info->balance_ctl);
3810 3811 3812 3813 3814 3815
	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);
3816
	kfree(fs_info->quota_root);
3817
	kfree(fs_info->uuid_root);
3818
	kfree(fs_info->free_space_root);
3819 3820
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
3821
	security_free_mnt_opts(&fs_info->security_opts);
3822 3823
	kfree(fs_info);
}
3824

3825 3826 3827 3828 3829
/* 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
3830
int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);
3831

C
Chris Mason 已提交
3832
/* root-item.c */
3833
int btrfs_find_root_ref(struct btrfs_root *tree_root,
3834 3835
			struct btrfs_path *path,
			u64 root_id, u64 ref_id);
3836 3837
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_root *tree_root,
3838 3839 3840 3841 3842
		       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,
3843
		       const char *name, int name_len);
3844 3845 3846 3847 3848
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);
3849 3850 3851 3852
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct btrfs_key *key,
				   struct btrfs_root_item *item);
3853 3854 3855
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);
3856
int btrfs_find_orphan_roots(struct btrfs_root *tree_root);
3857 3858
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
3859
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
3860 3861
void btrfs_update_root_times(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root);
3862

3863 3864 3865 3866 3867 3868 3869
/* 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);
3870 3871 3872
int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
			    int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
					      u64));
3873

C
Chris Mason 已提交
3874
/* dir-item.c */
C
Chris Mason 已提交
3875 3876
int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
			  const char *name, int name_len);
C
Chris Mason 已提交
3877 3878
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
3879
			  int name_len, struct inode *dir,
3880
			  struct btrfs_key *location, u8 type, u64 index);
3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891
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);
3892 3893 3894 3895
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);
3896 3897 3898 3899
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
3900
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
3901 3902 3903 3904
			    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
3905 3906 3907 3908 3909
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);
3910 3911 3912
int verify_dir_item(struct btrfs_root *root,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
3913 3914 3915 3916
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
						 struct btrfs_path *path,
						 const char *name,
						 int name_len);
3917 3918 3919 3920 3921 3922

/* 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);
3923
int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset);
3924

C
Chris Mason 已提交
3925
/* inode-item.c */
3926 3927 3928
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3929
			   u64 inode_objectid, u64 ref_objectid, u64 index);
3930 3931 3932
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
3933
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
3934 3935 3936
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
3937
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
3938 3939
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);
C
Chris Mason 已提交
3940

M
Mark Fasheh 已提交
3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953
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
3954
/* file-item.c */
3955
struct btrfs_dio_private;
3956 3957
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, u64 bytenr, u64 len);
3958
int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
3959
			  struct bio *bio, u32 *dst);
3960
int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode,
3961
			      struct bio *bio, u64 logical_offset);
C
Chris Mason 已提交
3962
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
C
Chris Mason 已提交
3963 3964 3965 3966 3967
			     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
3968 3969 3970
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
3971
			     u64 bytenr, int mod);
3972
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
3973
			   struct btrfs_root *root,
3974
			   struct btrfs_ordered_sum *sums);
3975
int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
3976
		       struct bio *bio, u64 file_start, int contig);
A
Arne Jansen 已提交
3977 3978
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
3979 3980 3981 3982 3983 3984
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
3985
/* inode.c */
3986 3987 3988 3989 3990 3991 3992 3993 3994
struct btrfs_delalloc_work {
	struct inode *inode;
	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,
3995
						    int delay_iput);
3996 3997
void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work);

J
Josef Bacik 已提交
3998 3999 4000
struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
4001
noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
4002 4003
			      u64 *orig_start, u64 *orig_block_len,
			      u64 *ram_bytes);
4004 4005

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
4006
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
4007 4008 4009 4010 4011
#define ClearPageChecked ClearPageFsMisc
#define SetPageChecked SetPageFsMisc
#define PageChecked PageFsMisc
#endif

L
Li Zefan 已提交
4012 4013 4014 4015 4016 4017 4018 4019
/* 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);
}

4020 4021
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
4022 4023 4024 4025 4026 4027 4028
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);
4029 4030 4031 4032
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
4033
int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
J
Josef Bacik 已提交
4034
			int front);
4035 4036 4037 4038 4039
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
4040
int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
4041 4042
int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
			       int nr);
4043 4044
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state);
4045
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
4046 4047 4048
			     struct btrfs_root *new_root,
			     struct btrfs_root *parent_root,
			     u64 new_dirid);
4049 4050 4051
int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
			 size_t size, struct bio *bio,
			 unsigned long bio_flags);
4052
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
C
Chris Mason 已提交
4053
int btrfs_readpage(struct file *file, struct page *page);
A
Al Viro 已提交
4054
void btrfs_evict_inode(struct inode *inode);
4055
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
C
Chris Mason 已提交
4056 4057
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
4058
int btrfs_drop_inode(struct inode *inode);
C
Chris Mason 已提交
4059 4060
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
S
Sage Weil 已提交
4061
long btrfs_ioctl_trans_end(struct file *file);
B
Balaji Rao 已提交
4062
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
4063
			 struct btrfs_root *root, int *was_new);
4064
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
4065
				    size_t pg_offset, u64 start, u64 end,
4066 4067 4068 4069
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
4070 4071
int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
				struct btrfs_root *root, struct inode *inode);
4072
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
4073
int btrfs_orphan_cleanup(struct btrfs_root *root);
4074 4075
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
4076
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
4077
void btrfs_invalidate_inodes(struct btrfs_root *root);
Y
Yan, Zheng 已提交
4078 4079
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_root *root);
4080 4081 4082
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);
4083 4084 4085 4086
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);
4087
int btrfs_inode_check_errors(struct inode *inode);
4088
extern const struct dentry_operations btrfs_dentry_operations;
4089 4090 4091
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);
#endif
C
Christoph Hellwig 已提交
4092 4093 4094

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
4095 4096
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
4097
int btrfs_is_empty_uuid(u8 *uuid);
C
Chris Mason 已提交
4098 4099 4100
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
4101 4102
void btrfs_get_block_group_info(struct list_head *groups_list,
				struct btrfs_ioctl_space_info *space);
4103 4104 4105
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
			       struct btrfs_ioctl_balance_args *bargs);

4106

C
Chris Mason 已提交
4107
/* file.c */
4108 4109
int btrfs_auto_defrag_init(void);
void btrfs_auto_defrag_exit(void);
C
Chris Mason 已提交
4110 4111 4112
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
4113
void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
4114
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
4115 4116
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			     int skip_pinned);
4117
extern const struct file_operations btrfs_file_operations;
J
Josef Bacik 已提交
4118 4119 4120
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root, struct inode *inode,
			 struct btrfs_path *path, u64 start, u64 end,
4121 4122 4123 4124
			 u64 *drop_end, int drop_cache,
			 int replace_extent,
			 u32 extent_item_size,
			 int *key_inserted);
J
Josef Bacik 已提交
4125 4126
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode, u64 start,
4127
		       u64 end, int drop_cache);
Y
Yan Zheng 已提交
4128 4129
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
S
Sage Weil 已提交
4130
int btrfs_release_file(struct inode *inode, struct file *file);
4131 4132 4133 4134
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);
4135
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
S
Sage Weil 已提交
4136

4137 4138
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
4139
			struct btrfs_root *root);
4140 4141 4142 4143

/* sysfs.c */
int btrfs_init_sysfs(void);
void btrfs_exit_sysfs(void);
4144
int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info);
4145
void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
4146

J
Josef Bacik 已提交
4147 4148
/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
J
Josef Bacik 已提交
4149

4150
/* super.c */
4151
int btrfs_parse_options(struct btrfs_root *root, char *options);
S
Sage Weil 已提交
4152
int btrfs_sync_fs(struct super_block *sb, int wait);
4153 4154 4155

#ifdef CONFIG_PRINTK
__printf(2, 3)
4156
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
4157 4158
#else
static inline __printf(2, 3)
4159
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
4160 4161 4162 4163
{
}
#endif

4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177
#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)
4178

4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196
/*
 * 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)

4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214
/*
 * 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)

4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231
/*
 * 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)
4232
#ifdef DEBUG
4233 4234
#define btrfs_debug(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
4235 4236
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4237 4238
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)
4239 4240
#define btrfs_debug_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
4241 4242 4243
#else
#define btrfs_debug(fs_info, fmt, args...) \
    no_printk(KERN_DEBUG fmt, ##args)
4244 4245
#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4246 4247
#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4248 4249
#define btrfs_debug_rl(fs_info, fmt, args...) \
	no_printk(KERN_DEBUG fmt, ##args)
4250
#endif
4251

4252 4253 4254 4255 4256 4257 4258
#define btrfs_printk_in_rcu(fs_info, fmt, args...)	\
do {							\
	rcu_read_lock();				\
	btrfs_printk(fs_info, fmt, ##args);		\
	rcu_read_unlock();				\
} while (0)

4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274
#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
4275 4276
#ifdef CONFIG_BTRFS_ASSERT

4277
__cold
J
Josef Bacik 已提交
4278 4279
static inline void assfail(char *expr, char *file, int line)
{
4280
	pr_err("BTRFS: assertion failed: %s, file: %s, line: %d",
J
Josef Bacik 已提交
4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291
	       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()
4292
__printf(5, 6)
4293
__cold
L
liubo 已提交
4294
void __btrfs_std_error(struct btrfs_fs_info *fs_info, const char *function,
J
Jeff Mahoney 已提交
4295
		     unsigned int line, int errno, const char *fmt, ...);
L
liubo 已提交
4296

4297
const char *btrfs_decode_error(int errno);
4298

4299
__cold
4300 4301 4302 4303
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root, const char *function,
			       unsigned int line, int errno);

4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315
#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)) {
4316 4317 4318 4319 4320
		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);
4321
			btrfs_info(fs_info, "setting %llu feature flag",
4322 4323 4324
					 flag);
		}
		spin_unlock(&fs_info->super_lock);
4325 4326 4327
	}
}

4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351
#define btrfs_clear_fs_incompat(__fs_info, opt) \
	__btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt)

static inline void __btrfs_clear_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) {
		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);
			btrfs_info(fs_info, "clearing %llu feature flag",
					 flag);
		}
		spin_unlock(&fs_info->super_lock);
	}
}

4352 4353 4354
#define btrfs_fs_incompat(fs_info, opt) \
	__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)

4355
static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
4356 4357 4358 4359 4360 4361
{
	struct btrfs_super_block *disk_super;
	disk_super = fs_info->super_copy;
	return !!(btrfs_super_incompat_flags(disk_super) & flag);
}

4362 4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419
#define btrfs_set_fs_compat_ro(__fs_info, opt) \
	__btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)

static inline void __btrfs_set_fs_compat_ro(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_compat_ro_flags(disk_super);
	if (!(features & flag)) {
		spin_lock(&fs_info->super_lock);
		features = btrfs_super_compat_ro_flags(disk_super);
		if (!(features & flag)) {
			features |= flag;
			btrfs_set_super_compat_ro_flags(disk_super, features);
			btrfs_info(fs_info, "setting %llu ro feature flag",
				   flag);
		}
		spin_unlock(&fs_info->super_lock);
	}
}

#define btrfs_clear_fs_compat_ro(__fs_info, opt) \
	__btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)

static inline void __btrfs_clear_fs_compat_ro(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_compat_ro_flags(disk_super);
	if (features & flag) {
		spin_lock(&fs_info->super_lock);
		features = btrfs_super_compat_ro_flags(disk_super);
		if (features & flag) {
			features &= ~flag;
			btrfs_set_super_compat_ro_flags(disk_super, features);
			btrfs_info(fs_info, "clearing %llu ro feature flag",
				   flag);
		}
		spin_unlock(&fs_info->super_lock);
	}
}

#define btrfs_fs_compat_ro(fs_info, opt) \
	__btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)

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

4420 4421 4422 4423
/*
 * Call btrfs_abort_transaction as early as possible when an error condition is
 * detected, that way the exact line number is reported.
 */
4424 4425
#define btrfs_abort_transaction(trans, root, errno)		\
do {								\
4426 4427 4428 4429 4430 4431 4432 4433 4434
	/* 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));		\
4435
} while (0)
L
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4437
#define btrfs_std_error(fs_info, errno, fmt, args...)		\
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do {								\
	__btrfs_std_error((fs_info), __func__, __LINE__,	\
			  (errno), fmt, ##args);		\
L
liubo 已提交
4441
} while (0)
J
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4442

4443
__printf(5, 6)
4444
__cold
J
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void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
		   unsigned int line, int errno, const char *fmt, ...);

4448 4449 4450 4451
/*
 * 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
4452 4453
#define btrfs_panic(fs_info, errno, fmt, args...)			\
do {									\
4454 4455
	__btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args);	\
	BUG();								\
L
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4456
} while (0)
J
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4457 4458

/* acl.c */
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4459
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
4460
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
4461
int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
4462 4463
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
4464
#else
4465
#define btrfs_get_acl NULL
4466
#define btrfs_set_acl NULL
4467 4468 4469 4470 4471 4472
static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
				 struct inode *inode, struct inode *dir)
{
	return 0;
}
#endif
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4474 4475 4476 4477 4478 4479 4480 4481
/* 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);
4482 4483 4484
int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, struct extent_buffer *buf,
			  struct extent_buffer *cow);
4485
void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
4486
			      u64 *bytes_to_reserve);
4487
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
4488
			      struct btrfs_pending_snapshot *pending);
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4489 4490

/* scrub.c */
4491 4492
int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
		    u64 end, struct btrfs_scrub_progress *progress,
4493
		    int readonly, int is_dev_replace);
4494 4495
void btrfs_scrub_pause(struct btrfs_root *root);
void btrfs_scrub_continue(struct btrfs_root *root);
4496 4497 4498
int btrfs_scrub_cancel(struct btrfs_fs_info *info);
int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
			   struct btrfs_device *dev);
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int btrfs_scrub_progress(struct btrfs_root *root, u64 devid,
			 struct btrfs_scrub_progress *progress);
4501 4502 4503 4504

/* 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);
4505 4506 4507 4508 4509 4510
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);
}
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4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527
/* 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);

4528 4529 4530
static inline int is_fstree(u64 rootid)
{
	if (rootid == BTRFS_FS_TREE_OBJECTID ||
4531 4532
	    ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
	      !btrfs_qgroup_level(rootid)))
4533 4534 4535
		return 1;
	return 0;
}
4536 4537 4538 4539 4540 4541

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

4542 4543 4544 4545
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_destroy_inode(struct inode *inode);
#endif
4546

4547 4548 4549 4550 4551 4552 4553 4554 4555
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;
}

4556
#endif