Release 4.10 fs/btrfs/ctree.h

/*
 * 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.
 */

#ifndef __BTRFS_CTREE__

#define __BTRFS_CTREE__

#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/fs.h>
#include <linux/rwsem.h>
#include <linux/semaphore.h>
#include <linux/completion.h>
#include <linux/backing-dev.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/kobject.h>
#include <trace/events/btrfs.h>
#include <asm/kmap_types.h>
#include <linux/pagemap.h>
#include <linux/btrfs.h>
#include <linux/btrfs_tree.h>
#include <linux/workqueue.h>
#include <linux/security.h>
#include <linux/sizes.h>
#include <linux/dynamic_debug.h>
#include "extent_io.h"
#include "extent_map.h"
#include "async-thread.h"

struct btrfs_trans_handle;
struct btrfs_transaction;
struct btrfs_pending_snapshot;
extern struct kmem_cache *btrfs_trans_handle_cachep;
extern struct kmem_cache *btrfs_transaction_cachep;
extern struct kmem_cache *btrfs_bit_radix_cachep;
extern struct kmem_cache *btrfs_path_cachep;
extern struct kmem_cache *btrfs_free_space_cachep;
struct btrfs_ordered_sum;

#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS

#define STATIC noinline
#else

#define STATIC static noinline
#endif


#define BTRFS_MAGIC 0x4D5F53665248425FULL 
/* ascii _BHRfS_M, no null */


#define BTRFS_MAX_MIRRORS 3


#define BTRFS_MAX_LEVEL 8


#define BTRFS_COMPAT_EXTENT_TREE_V0

/*
 * 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

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

#define BTRFS_NAME_LEN 255

/*
 * 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


static const int btrfs_csum_sizes[] = { 4 };

/* four bytes for CRC32 */

#define BTRFS_EMPTY_DIR_SIZE 0

/* ioprio of readahead is set to idle */

#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))


#define BTRFS_DIRTY_METADATA_THRESH	SZ_32M


#define BTRFS_MAX_EXTENT_SIZE SZ_128M


struct btrfs_mapping_tree {
	
struct extent_map_tree map_tree;
};



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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/*
 * File system states
 */

#define BTRFS_FS_STATE_ERROR		0

#define BTRFS_FS_STATE_REMOUNTING	1

#define BTRFS_FS_STATE_TRANS_ABORTED	2

#define BTRFS_FS_STATE_DEV_REPLACING	3

#define BTRFS_FS_STATE_DUMMY_FS_INFO	4


#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

/*
 * every tree block (leaf or node) starts with this header.
 */

struct btrfs_header {
	/* these first four must match the super block */
	
u8 csum[BTRFS_CSUM_SIZE];
	
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
	
__le64 bytenr; /* which block this node is supposed to live in */
	
__le64 flags;

	/* allowed to be different from the super from here on down */
	
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
	
__le64 generation;
	
__le64 owner;
	
__le32 nritems;
	
u8 level;
} __attribute__ ((__packed__));

/*
 * 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

/*
 * 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 */
	
__le64 unused_64[4];

	
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__));

/*
 * the super block basically lists the main trees of the FS
 * it currently lacks any block count etc etc
 */

struct btrfs_super_block {
	
u8 csum[BTRFS_CSUM_SIZE];
	/* the first 4 fields must match struct btrfs_header */
	
u8 fsid[BTRFS_FSID_SIZE];    /* FS specific uuid */
	
__le64 bytenr; /* this block number */
	
__le64 flags;

	/* allowed to be different from the btrfs_header from here own down */
	
__le64 magic;
	
__le64 generation;
	
__le64 root;
	
__le64 chunk_root;
	
__le64 log_root;

	/* this will help find the new super based on the log root */
	
__le64 log_root_transid;
	
__le64 total_bytes;
	
__le64 bytes_used;
	
__le64 root_dir_objectid;
	
__le64 num_devices;
	
__le32 sectorsize;
	
__le32 nodesize;
	
__le32 __unused_leafsize;
	
__le32 stripesize;
	
__le32 sys_chunk_array_size;
	
__le64 chunk_root_generation;
	
__le64 compat_flags;
	
__le64 compat_ro_flags;
	
__le64 incompat_flags;
	
__le16 csum_type;
	
u8 root_level;
	
u8 chunk_root_level;
	
u8 log_root_level;
	
struct btrfs_dev_item dev_item;

	
char label[BTRFS_LABEL_SIZE];

	
__le64 cache_generation;
	
__le64 uuid_tree_generation;

	/* future expansion */
	
__le64 reserved[30];
	
u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
	
struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
} __attribute__ ((__packed__));

/*
 * Compat flags that we support.  If any incompat flags are set other than the
 * ones specified below then we will fail to mount
 */

#define BTRFS_FEATURE_COMPAT_SUPP		0ULL

#define BTRFS_FEATURE_COMPAT_SAFE_SET		0ULL

#define BTRFS_FEATURE_COMPAT_SAFE_CLEAR		0ULL


#define BTRFS_FEATURE_COMPAT_RO_SUPP			\
	(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE |      \
         BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID)


#define BTRFS_FEATURE_COMPAT_RO_SAFE_SET	0ULL

#define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR	0ULL


#define BTRFS_FEATURE_INCOMPAT_SUPP			\
	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |         \
         BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |        \
         BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS |          \
         BTRFS_FEATURE_INCOMPAT_BIG_METADATA |          \
         BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO |          \
         BTRFS_FEATURE_INCOMPAT_RAID56 |                \
         BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF |         \
         BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA |       \
         BTRFS_FEATURE_INCOMPAT_NO_HOLES)


#define BTRFS_FEATURE_INCOMPAT_SAFE_SET			\
	(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)

#define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR		0ULL

/*
 * A leaf is full of items. offset and size tell us where to find
 * the item in the leaf (relative to the start of the data area)
 */

struct btrfs_item {
	
struct btrfs_disk_key key;
	
__le32 offset;
	
__le32 size;
} __attribute__ ((__packed__));

/*
 * 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.
 */

struct btrfs_leaf {
	
struct btrfs_header header;
	
struct btrfs_item items[];
} __attribute__ ((__packed__));

/*
 * all non-leaf blocks are nodes, they hold only keys and pointers to
 * other blocks
 */

struct btrfs_key_ptr {
	
struct btrfs_disk_key key;
	
__le64 blockptr;
	
__le64 generation;
} __attribute__ ((__packed__));


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

/*
 * 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
 * to any other levels that are present.
 *
 * The slots array records the index of the item or block pointer
 * used while walking the tree.
 */



enum { READA_NONE = 0, READA_BACK, READA_FORWARD };

struct btrfs_path {
	
struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
	
int slots[BTRFS_MAX_LEVEL];
	/* if there is real range locking, this locks field will change */
	
u8 locks[BTRFS_MAX_LEVEL];
	
u8 reada;
	/* keep some upper locks as we walk down */
	
u8 lowest_level;

	/*
         * set by btrfs_split_item, tells search_slot to keep all locks
         * and to force calls to keep space in the nodes
         */
	
unsigned int search_for_split:1;
	
unsigned int keep_locks:1;
	
unsigned int skip_locking:1;
	
unsigned int leave_spinning:1;
	
unsigned int search_commit_root:1;
	
unsigned int need_commit_sem:1;
	
unsigned int skip_release_on_error:1;
};

#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
                                        sizeof(struct btrfs_item))

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;
	
rwlock_t lock;
	
atomic_t read_locks;
	
atomic_t blocking_readers;
	
wait_queue_head_t read_lock_wq;

	
struct btrfs_scrub_progress scrub_progress;
};

/* For raid type sysfs entries */

struct raid_kobject {
	
int raid_type;
	
struct kobject kobj;
};


struct btrfs_space_info {
	
spinlock_t lock;

	
u64 total_bytes;	/* total bytes in the space,
                                   this doesn't take mirrors into account */
	
u64 bytes_used;		/* total bytes used,
                                   this doesn't take mirrors into account */
	
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
                                   delalloc/allocations */
	
u64 bytes_readonly;	/* total bytes that are read only */

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

	
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 */

	
u64 disk_used;		/* total bytes used on disk */
	
u64 disk_total;		/* total bytes on disk, takes mirrors into
                                   account */

	
u64 flags;

	/*
         * 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 every time we
         * call btrfs_free_extent so it is a realtime count of what will be
         * freed once the transaction is committed.  It will be zeroed every
         * time the transaction commits.
         */
	
struct percpu_counter total_bytes_pinned;

	
struct list_head list;
	/* Protected by the spinlock 'lock'. */
	
struct list_head ro_bgs;
	
struct list_head priority_tickets;
	
struct list_head tickets;
	/*
         * tickets_id just indicates the next ticket will be handled, so note
         * it's not stored per ticket.
         */
	
u64 tickets_id;

	
struct rw_semaphore groups_sem;
	/* for block groups in our same type */
	
struct list_head block_groups[BTRFS_NR_RAID_TYPES];
	
wait_queue_head_t wait;

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


#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


struct btrfs_block_rsv {
	
u64 size;
	
u64 reserved;
	
struct btrfs_space_info *space_info;
	
spinlock_t lock;
	
unsigned short full;
	
unsigned short type;
	
unsigned short failfast;
};

/*
 * 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;

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

	
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;
};


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


enum btrfs_disk_cache_state {
	
BTRFS_DC_WRITTEN	= 0,
	
BTRFS_DC_ERROR		= 1,
	
BTRFS_DC_CLEAR		= 2,
	
BTRFS_DC_SETUP		= 3,
};


struct btrfs_caching_control {
	
struct list_head list;
	
struct mutex mutex;
	
wait_queue_head_t wait;
	
struct btrfs_work work;
	
struct btrfs_block_group_cache *block_group;
	
u64 progress;
	
atomic_t count;
};

/* Once caching_thread() finds this much free space, it will wake up waiters. */

#define CACHING_CTL_WAKE_UP (1024 * 1024 * 2)


struct btrfs_io_ctl {
	

void *cur, *orig;
	
struct page *page;
	
struct page **pages;
	
struct btrfs_fs_info *fs_info;
	
struct inode *inode;
	
unsigned long size;
	
int index;
	
int num_pages;
	
int entries;
	
int bitmaps;
	
unsigned check_crcs:1;
};


struct btrfs_block_group_cache {
	
struct btrfs_key key;
	
struct btrfs_block_group_item item;
	
struct btrfs_fs_info *fs_info;
	
struct inode *inode;
	
spinlock_t lock;
	
u64 pinned;
	
u64 reserved;
	
u64 delalloc_bytes;
	
u64 bytes_super;
	
u64 flags;
	
u64 cache_generation;
	
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;

	/*
         * 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;

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

	
unsigned int ro;
	
unsigned int iref:1;
	
unsigned int has_caching_ctl:1;
	
unsigned int removed:1;

	
int disk_cache_state;

	/* cache tracking stuff */
	
int cached;
	
struct btrfs_caching_control *caching_ctl;
	
u64 last_byte_to_unpin;

	
struct btrfs_space_info *space_info;

	/* free space cache stuff */
	
struct btrfs_free_space_ctl *free_space_ctl;

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

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

	/* usage count */
	
atomic_t count;

	/* 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;

	/* For delayed block group creation or deletion of empty block groups */
	
struct list_head bg_list;

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

	
atomic_t trimming;

	/* For dirty block groups */
	
struct list_head dirty_list;
	
struct list_head io_list;

	
struct btrfs_io_ctl io_ctl;

	/*
         * Incremented when doing extent allocations and holding a read lock
         * on the space_info's groups_sem semaphore.
         * Decremented when an ordered extent that represents an IO against this
         * block group's range is created (after it's added to its inode's
         * root's list of ordered extents) or immediately after the allocation
         * if it's a metadata extent or fallocate extent (for these cases we
         * don't create ordered extents).
         */
	
atomic_t reservations;

	/*
         * Incremented while holding the spinlock *lock* by a task checking if
         * it can perform a nocow write (incremented if the value for the *ro*
         * field is 0). Decremented by such tasks once they create an ordered
         * extent or before that if some error happens before reaching that step.
         * This is to prevent races between block group relocation and nocow
         * writes through direct IO.
         */
	
atomic_t nocow_writers;

	/* 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;
};

/* delayed seq elem */

struct seq_list {
	
struct list_head list;
	
u64 seq;
};


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


enum btrfs_orphan_cleanup_state {
	
ORPHAN_CLEANUP_STARTED	= 1,
	
ORPHAN_CLEANUP_DONE	= 2,
};

/* 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 {
	
struct list_head stripe_cache;
	
spinlock_t cache_lock;
	
int cache_size;
	
struct btrfs_stripe_hash table[];
};


#define BTRFS_STRIPE_HASH_TABLE_BITS 11

void btrfs_init_async_reclaim_work(struct work_struct *work);

/* fs_info */
struct reloc_control;
struct btrfs_device;
struct btrfs_fs_devices;
struct btrfs_balance_control;
struct btrfs_delayed_root;


#define BTRFS_FS_BARRIER			1

#define BTRFS_FS_CLOSING_START			2

#define BTRFS_FS_CLOSING_DONE			3

#define BTRFS_FS_LOG_RECOVERING			4

#define BTRFS_FS_OPEN				5

#define BTRFS_FS_QUOTA_ENABLED			6

#define BTRFS_FS_QUOTA_ENABLING			7

#define BTRFS_FS_QUOTA_DISABLING		8

#define BTRFS_FS_UPDATE_UUID_TREE_GEN		9

#define BTRFS_FS_CREATING_FREE_SPACE_TREE	10

#define BTRFS_FS_BTREE_ERR			11

#define BTRFS_FS_LOG1_ERR			12

#define BTRFS_FS_LOG2_ERR			13


struct btrfs_fs_info {
	
u8 fsid[BTRFS_FSID_SIZE];
	
u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
	
unsigned long flags;
	
struct btrfs_root *extent_root;
	
struct btrfs_root *tree_root;
	
struct btrfs_root *chunk_root;
	
struct btrfs_root *dev_root;
	
struct btrfs_root *fs_root;
	
struct btrfs_root *csum_root;
	
struct btrfs_root *quota_root;
	
struct btrfs_root *uuid_root;
	
struct btrfs_root *free_space_root;

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

	
spinlock_t fs_roots_radix_lock;
	
struct radix_tree_root fs_roots_radix;

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

	/* keep track of unallocated space */
	
spinlock_t free_chunk_lock;
	
u64 free_chunk_space;

	
struct extent_io_tree freed_extents[2];
	
struct extent_io_tree *pinned_extents;

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

	/*
         * block reservation for extent, checksum, root tree and
         * delayed dir index item
         */
	
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;
	/* block reservation for delayed operations */
	
struct btrfs_block_rsv delayed_block_rsv;

	
struct btrfs_block_rsv empty_block_rsv;

	
u64 generation;
	
u64 last_trans_committed;
	
u64 avg_delayed_ref_runtime;

	/*
         * 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;
	
unsigned long mount_opt;
	/*
         * Track requests for actions that need to be done during transaction
         * commit (like for some mount options).
         */
	
unsigned long pending_changes;
	
unsigned long compress_type:4;
	
int commit_interval;
	/*
         * 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.
         */
	
u64 max_inline;
	/*
         * 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.
         */
	
u64 alloc_start;
	
struct btrfs_transaction *running_transaction;
	
wait_queue_head_t transaction_throttle;
	
wait_queue_head_t transaction_wait;
	
wait_queue_head_t transaction_blocked_wait;
	
wait_queue_head_t async_submit_wait;

	/*
         * 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;
	
struct btrfs_super_block *super_copy;
	
struct btrfs_super_block *super_for_commit;
	
struct super_block *sb;
	
struct inode *btree_inode;
	
struct backing_dev_info bdi;
	
struct mutex tree_log_mutex;
	
struct mutex transaction_kthread_mutex;
	
struct mutex cleaner_mutex;
	
struct mutex chunk_mutex;
	
struct mutex volume_mutex;

	/*
         * 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;

	/* 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;

	/*
         * 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;

	
struct rw_semaphore commit_root_sem;

	
struct rw_semaphore cleanup_work_sem;

	
struct rw_semaphore subvol_sem;
	
struct srcu_struct subvol_srcu;

	
spinlock_t trans_lock;
	/*
         * the reloc mutex goes with the trans lock, it is taken
         * during commit to protect us from the relocation code
         */
	
struct mutex reloc_mutex;

	
struct list_head trans_list;
	
struct list_head dead_roots;
	
struct list_head caching_block_groups;

	
spinlock_t delayed_iput_lock;
	
struct list_head delayed_iputs;
	
struct mutex cleaner_delayed_iput_mutex;

	/* this protects tree_mod_seq_list */
	
spinlock_t tree_mod_seq_lock;
	
atomic64_t tree_mod_seq;
	
struct list_head tree_mod_seq_list;

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

	
atomic_t nr_async_submits;
	
atomic_t async_submit_draining;
	
atomic_t nr_async_bios;
	
atomic_t async_delalloc_pages;
	
atomic_t open_ioctl_trans;

	/*
         * this is used to protect the following list -- ordered_roots.
         */
	
spinlock_t ordered_root_lock;

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

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

	/*
         * 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.
         *
         * A third pool does submit_bio to avoid deadlocking with the other
         * two
         */
	
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;
	
struct btrfs_workqueue *endio_repair_workers;
	
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;

	/*
         * fixup workers take dirty pages that didn't properly go through
         * the cow mechanism and make them safe to write.  It happens
         * for the sys_munmap function call path
         */
	
struct btrfs_workqueue *fixup_workers;
	
struct btrfs_workqueue *delayed_workers;

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

	
struct kobject *space_info_kobj;

	
u64 total_pinned;

	/* used to keep from writing metadata until there is a nice batch */
	
struct percpu_counter dirty_metadata_bytes;
	
struct percpu_counter delalloc_bytes;
	
s32 dirty_metadata_batch;
	
s32 delalloc_batch;

	
struct list_head dirty_cowonly_roots;

	
struct btrfs_fs_devices *fs_devices;

	/*
         * 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.
         */
	
struct list_head space_info;

	
struct btrfs_space_info *data_sinfo;

	
struct reloc_control *reloc_ctl;

	/* 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;

	/* auto defrag inodes go here */
	
spinlock_t defrag_inodes_lock;
	
struct rb_root defrag_inodes;
	
atomic_t defrag_running;

	/* Used to protect avail_{data, metadata, system}_alloc_bits */
	
seqlock_t profiles_lock;
	/*
         * 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)
         */
	
u64 avail_data_alloc_bits;
	
u64 avail_metadata_alloc_bits;
	
u64 avail_system_alloc_bits;

	/* restriper state */
	
spinlock_t balance_lock;
	
struct mutex balance_mutex;
	
atomic_t balance_running;
	
atomic_t balance_pause_req;
	
atomic_t balance_cancel_req;
	
struct btrfs_balance_control *balance_ctl;
	
wait_queue_head_t balance_wait_q;

	
unsigned data_chunk_allocations;
	
unsigned metadata_ratio;

	
void *bdev_holder;

	/* 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;
	
struct btrfs_workqueue *scrub_workers;
	
struct btrfs_workqueue *scrub_wr_completion_workers;
	
struct btrfs_workqueue *scrub_nocow_workers;
	
struct btrfs_workqueue *scrub_parity_workers;

#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
	
u32 check_integrity_print_mask;
#endif
	/* is qgroup tracking in a consistent state? */
	
u64 qgroup_flags;

	/* holds configuration and tracking. Protected by qgroup_lock */
	
struct rb_root qgroup_tree;
	
struct rb_root qgroup_op_tree;
	
spinlock_t qgroup_lock;
	
spinlock_t qgroup_op_lock;
	
atomic_t qgroup_op_seq;

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

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

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

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

	/* qgroup rescan items */
	
struct mutex qgroup_rescan_lock; /* protects the progress item */
	
struct btrfs_key qgroup_rescan_progress;
	
struct btrfs_workqueue *qgroup_rescan_workers;
	
struct completion qgroup_rescan_completion;
	
struct btrfs_work qgroup_rescan_work;
	
bool qgroup_rescan_running;	/* protected by qgroup_rescan_lock */

	/* filesystem state */
	
unsigned long fs_state;

	
struct btrfs_delayed_root *delayed_root;

	/* readahead tree */
	
spinlock_t reada_lock;
	
struct radix_tree_root reada_tree;

	/* readahead works cnt */
	
atomic_t reada_works_cnt;

	/* Extent buffer radix tree */
	
spinlock_t buffer_lock;
	
struct radix_tree_root buffer_radix;

	/* next backup root to be overwritten */
	
int backup_root_index;

	
int num_tolerated_disk_barrier_failures;

	/* device replace state */
	
struct btrfs_dev_replace dev_replace;

	
atomic_t mutually_exclusive_operation_running;

	
struct percpu_counter bio_counter;
	
wait_queue_head_t replace_wait;

	
struct semaphore uuid_tree_rescan_sem;

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

	
spinlock_t unused_bgs_lock;
	
struct list_head unused_bgs;
	
struct mutex unused_bg_unpin_mutex;
	
struct mutex delete_unused_bgs_mutex;

	/* For btrfs to record security options */
	
struct security_mnt_opts security_opts;

	/*
         * 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;

	/* Used to record internally whether fs has been frozen */
	
int fs_frozen;

	/* Cached block sizes */
	
u32 nodesize;
	
u32 sectorsize;
	
u32 stripesize;
};



static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

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struct btrfs_subvolume_writers {
	
struct percpu_counter	counter;
	
wait_queue_head_t	wait;
};

/*
 * 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_ORPHAN_ITEM_INSERTED	4

#define BTRFS_ROOT_DEFRAG_RUNNING	5

#define BTRFS_ROOT_FORCE_COW		6

#define BTRFS_ROOT_MULTI_LOG_TASKS	7

#define BTRFS_ROOT_DIRTY		8

/*
 * in ram representation of the tree.  extent_root is used for all allocations
 * and for the extent tree extent_root root.
 */

struct btrfs_root {
	
struct extent_buffer *node;

	
struct extent_buffer *commit_root;
	
struct btrfs_root *log_root;
	
struct btrfs_root *reloc_root;

	
unsigned long state;
	
struct btrfs_root_item root_item;
	
struct btrfs_key root_key;
	
struct btrfs_fs_info *fs_info;
	
struct extent_io_tree dirty_log_pages;

	
struct mutex objectid_mutex;

	
spinlock_t accounting_lock;
	
struct btrfs_block_rsv *block_rsv;

	/* free ino cache stuff */
	
struct btrfs_free_space_ctl *free_ino_ctl;
	
enum btrfs_caching_type ino_cache_state;
	
spinlock_t ino_cache_lock;
	
wait_queue_head_t ino_cache_wait;
	
struct btrfs_free_space_ctl *free_ino_pinned;
	
u64 ino_cache_progress;
	
struct inode *ino_cache_inode;

	
struct mutex log_mutex;
	
wait_queue_head_t log_writer_wait;
	
wait_queue_head_t log_commit_wait[2];
	
struct list_head log_ctxs[2];
	
atomic_t log_writers;
	
atomic_t log_commit[2];
	
atomic_t log_batch;
	
int log_transid;
	/* No matter the commit succeeds or not*/
	
int log_transid_committed;
	/* Just be updated when the commit succeeds. */
	
int last_log_commit;
	
pid_t log_start_pid;

	
u64 objectid;
	
u64 last_trans;

	
u32 type;

	
u64 highest_objectid;

#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	/* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */
	
u64 alloc_bytenr;
#endif

	
u64 defrag_trans_start;
	
struct btrfs_key defrag_progress;
	
struct btrfs_key defrag_max;
	
char *name;

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

	
struct list_head root_list;

	
spinlock_t log_extents_lock[2];
	
struct list_head logged_list[2];

	
spinlock_t orphan_lock;
	
atomic_t orphan_inodes;
	
struct btrfs_block_rsv *orphan_block_rsv;
	
int orphan_cleanup_state;

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

	/*
         * radix tree that keeps track of delayed nodes of every inode,
         * protected by inode_lock
         */
	
struct radix_tree_root delayed_nodes_tree;
	/*
         * right now this just gets used so that a root has its own devid
         * for stat.  It may be used for more later
         */
	
dev_t anon_dev;

	
spinlock_t root_item_lock;
	
atomic_t refs;

	
struct mutex delalloc_mutex;
	
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;

	
struct mutex ordered_extent_mutex;
	/*
         * 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;

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

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


static inline u32 btrfs_inode_sectorsize(const struct inode *inode)
{
	return btrfs_sb(inode->i_sb)->sectorsize;
}

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static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize)
{
	return blocksize - sizeof(struct btrfs_header);
}

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static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info)
{
	return __BTRFS_LEAF_DATA_SIZE(info->nodesize);
}

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static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
{
	return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
}

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static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
{
	return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
}

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#define BTRFS_FILE_EXTENT_INLINE_DATA_START		\
		(offsetof(struct btrfs_file_extent_item, disk_bytenr))


static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
{
	return BTRFS_MAX_ITEM_SIZE(info) -
	       BTRFS_FILE_EXTENT_INLINE_DATA_START;
}

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static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
{
	return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
}

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/*
 * Flags for mount options.
 *
 * Note: don't forget to add new options to btrfs_show_options()
 */

#define BTRFS_MOUNT_NODATASUM		(1 << 0)

#define BTRFS_MOUNT_NODATACOW		(1 << 1)

#define BTRFS_MOUNT_NOBARRIER		(1 << 2)

#define BTRFS_MOUNT_SSD			(1 << 3)

#define BTRFS_MOUNT_DEGRADED		(1 << 4)

#define BTRFS_MOUNT_COMPRESS		(1 << 5)

#define BTRFS_MOUNT_NOTREELOG           (1 << 6)

#define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)

#define BTRFS_MOUNT_SSD_SPREAD		(1 << 8)

#define BTRFS_MOUNT_NOSSD		(1 << 9)

#define BTRFS_MOUNT_DISCARD		(1 << 10)

#define BTRFS_MOUNT_FORCE_COMPRESS      (1 << 11)

#define BTRFS_MOUNT_SPACE_CACHE		(1 << 12)

#define BTRFS_MOUNT_CLEAR_CACHE		(1 << 13)

#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14)

#define BTRFS_MOUNT_ENOSPC_DEBUG	 (1 << 15)

#define BTRFS_MOUNT_AUTO_DEFRAG		(1 << 16)

#define BTRFS_MOUNT_INODE_MAP_CACHE	(1 << 17)

#define BTRFS_MOUNT_USEBACKUPROOT	(1 << 18)

#define BTRFS_MOUNT_SKIP_BALANCE	(1 << 19)

#define BTRFS_MOUNT_CHECK_INTEGRITY	(1 << 20)

#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)

#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR	(1 << 22)

#define BTRFS_MOUNT_RESCAN_UUID_TREE	(1 << 23)

#define BTRFS_MOUNT_FRAGMENT_DATA	(1 << 24)

#define BTRFS_MOUNT_FRAGMENT_METADATA	(1 << 25)

#define BTRFS_MOUNT_FREE_SPACE_TREE	(1 << 26)

#define BTRFS_MOUNT_NOLOGREPLAY		(1 << 27)


#define BTRFS_DEFAULT_COMMIT_INTERVAL	(30)

#define BTRFS_DEFAULT_MAX_INLINE	(2048)


#define btrfs_clear_opt(o, opt)		((o) &= ~BTRFS_MOUNT_##opt)

#define btrfs_set_opt(o, opt)		((o) |= BTRFS_MOUNT_##opt)

#define btrfs_raw_test_opt(o, opt)	((o) & BTRFS_MOUNT_##opt)

#define btrfs_test_opt(fs_info, opt)	((fs_info)->mount_opt & \
                                         BTRFS_MOUNT_##opt)


#define btrfs_set_and_info(fs_info, opt, fmt, args...)			\
{                                                                       \
        if (!btrfs_test_opt(fs_info, opt))                              \
                btrfs_info(fs_info, fmt, ##args);                       \
        btrfs_set_opt(fs_info->mount_opt, opt);                         \
}


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

#ifdef CONFIG_BTRFS_DEBUG

static inline int

btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group)
{
	struct btrfs_fs_info *fs_info = block_group->fs_info;

	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
	       (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
}
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#endif

/*
 * 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)
 */


#define BTRFS_PENDING_SET_INODE_MAP_CACHE	(0)

#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE	(1)

#define BTRFS_PENDING_COMMIT			(2)


#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)

/*
 * Inode flags
 */

#define BTRFS_INODE_NODATASUM		(1 << 0)

#define BTRFS_INODE_NODATACOW		(1 << 1)

#define BTRFS_INODE_READONLY		(1 << 2)

#define BTRFS_INODE_NOCOMPRESS		(1 << 3)

#define BTRFS_INODE_PREALLOC		(1 << 4)

#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)

#define BTRFS_INODE_COMPRESS		(1 << 11)


#define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)


struct btrfs_map_token {
	
struct extent_buffer *eb;
	
char *kaddr;
	
unsigned long offset;
};


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



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

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/* some macros to generate set/get functions 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)))


#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)


#define BTRFS_SETGET_FUNCS(name, type, member, bits)			\
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); \
}


#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits)		\
static inline u##bits btrfs_##name(struct extent_buffer *eb)            \
{                                                                       \
        type *p = page_address(eb->pages[0]);                           \
        u##bits res = le##bits##_to_cpu(p->member);                     \
        return res;                                                     \
}                                                                       \
static inline void btrfs_set_##name(struct extent_buffer *eb,           \
                                    u##bits val)                        \
{                                                                       \
        type *p = page_address(eb->pages[0]);                           \
        p->member = cpu_to_le##bits(val);                               \
}


#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);                               \
}

BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
		   start_offset, 64);
BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
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);
BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);

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);
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);
BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
			 generation, 64);



static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
{
	return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
}

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

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BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
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);
BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);



static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
{
	return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
}

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BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
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);
BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
			 sub_stripes, 16);
BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);



static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
						   int nr)
{
	unsigned long offset = (unsigned long)c;
	offset += offsetof(struct btrfs_chunk, stripe);
	offset += nr * sizeof(struct btrfs_stripe);
	return (struct btrfs_stripe *)offset;
}

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

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

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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));
}

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/* struct btrfs_block_group_item */
BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
			 used, 64);
BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
			 used, 64);
BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
			struct btrfs_block_group_item, chunk_objectid, 64);

BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
		   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);

/* 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);

/* struct btrfs_inode_ref */
BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);

/* 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);

/* struct btrfs_inode_item */
BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
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);
BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);

/* struct btrfs_dev_extent */
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);
BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);



static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
{
	unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
	return (unsigned long)dev + ptr;
}

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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);

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);
}

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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;
}

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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);

/* struct btrfs_node */
BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
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);



static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
{
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
}

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static inline void btrfs_set_node_blockptr(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_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
}

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static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
{
	unsigned long ptr;
	ptr = offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
	return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
}

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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);
}

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static inline unsigned long btrfs_node_key_ptr_offset(int nr)
{
	return offsetof(struct btrfs_node, ptrs) +
		sizeof(struct btrfs_key_ptr) * nr;
}

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



static inline void btrfs_set_node_key(struct extent_buffer *eb,
				      struct btrfs_disk_key *disk_key, int nr)
{
	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);
}

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/* struct btrfs_item */
BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);



static inline unsigned long btrfs_item_nr_offset(int nr)
{
	return offsetof(struct btrfs_leaf, items) +
		sizeof(struct btrfs_item) * nr;
}

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static inline struct btrfs_item *btrfs_item_nr(int nr)
{
	return (struct btrfs_item *)btrfs_item_nr_offset(nr);
}

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

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

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

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

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static inline void btrfs_item_key(struct extent_buffer *eb,
			   struct btrfs_disk_key *disk_key, int nr)
{
	struct btrfs_item *item = btrfs_item_nr(nr);
	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
}

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static inline void btrfs_set_item_key(struct extent_buffer *eb,
			       struct btrfs_disk_key *disk_key, int nr)
{
	struct btrfs_item *item = btrfs_item_nr(nr);
	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
}

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

/*
 * 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);

/* struct btrfs_dir_item */
BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
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);



static inline void btrfs_dir_item_key(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_disk_key *key)
{
	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
}

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static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
					  struct btrfs_dir_item *item,
					  struct btrfs_disk_key *key)
{
	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
}

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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);
}

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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);
}

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/* 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);



static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
					 struct btrfs_disk_key *disk)
{
	cpu->offset = le64_to_cpu(disk->offset);
	cpu->type = disk->type;
	cpu->objectid = le64_to_cpu(disk->objectid);
}

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static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
					 struct btrfs_key *cpu)
{
	disk->offset = cpu_to_le64(cpu->offset);
	disk->type = cpu->type;
	disk->objectid = cpu_to_le64(cpu->objectid);
}

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static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
{
	struct btrfs_disk_key disk_key;
	btrfs_node_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
}

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static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
				  struct btrfs_key *key, int nr)
{
	struct btrfs_disk_key disk_key;
	btrfs_item_key(eb, &disk_key, nr);
	btrfs_disk_key_to_cpu(key, &disk_key);
}

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static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
				      struct btrfs_dir_item *item,
				      struct btrfs_key *key)
{
	struct btrfs_disk_key disk_key;
	btrfs_dir_item_key(eb, item, &disk_key);
	btrfs_disk_key_to_cpu(key, &disk_key);
}


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static inline u8 btrfs_key_type(struct btrfs_key *key)
{
	return key->type;
}

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

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/* struct btrfs_header */
BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
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);
BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
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);



static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
{
	return (btrfs_header_flags(eb) & flag) == flag;
}

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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;
}

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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;
}

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static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
{
	u64 flags = btrfs_header_flags(eb);
	return flags >> BTRFS_BACKREF_REV_SHIFT;
}

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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);
}

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static inline unsigned long btrfs_header_fsid(void)
{
	return offsetof(struct btrfs_header, fsid);
}

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static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
{
	return offsetof(struct btrfs_header, chunk_tree_uuid);
}

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static inline int btrfs_is_leaf(struct extent_buffer *eb)
{
	return btrfs_header_level(eb) == 0;
}

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/* struct btrfs_root_item */
BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);

BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
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);
BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
			 last_snapshot, 64);
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);



static inline bool btrfs_root_readonly(struct btrfs_root *root)
{
	return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0;
}

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

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/* 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);

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



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);
}

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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);
}

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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);
}

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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);
}

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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);
}

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36
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1
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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);
}

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ilya dryomov
ilya dryomov
36
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1
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36
100.00%
1
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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);
	cpu->limit = le64_to_cpu(disk->limit);
	cpu->stripes_min = le32_to_cpu(disk->stripes_min);
	cpu->stripes_max = le32_to_cpu(disk->stripes_max);
}

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ilya dryomov
ilya dryomov
129
79.63%
1
33.33%
david sterba
david sterba
33
20.37%
2
66.67%
Total
162
100.00%
3
100.00%


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);
	disk->limit = cpu_to_le64(cpu->limit);
	disk->stripes_min = cpu_to_le32(cpu->stripes_min);
	disk->stripes_max = cpu_to_le32(cpu->stripes_max);
}

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ilya dryomov
ilya dryomov
129
79.63%
1
33.33%
david sterba
david sterba
33
20.37%
2
66.67%
Total
162
100.00%
3
100.00%

/* struct btrfs_super_block */
BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
			 generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
			 struct btrfs_super_block, sys_chunk_array_size, 32);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
			 struct btrfs_super_block, chunk_root_generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
			 root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
			 chunk_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
			 chunk_root_level, 8);
BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
			 log_root, 64);
BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
			 log_root_transid, 64);
BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
			 log_root_level, 8);
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);
BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
			 sectorsize, 32);
BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
			 nodesize, 32);
BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
			 stripesize, 32);
BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
			 root_dir_objectid, 64);
BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
			 num_devices, 64);
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,
			 compat_ro_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
			 incompat_flags, 64);
BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
			 csum_type, 16);
BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
			 cache_generation, 64);
BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
			 uuid_tree_generation, 64);



static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
{
	u16 t = btrfs_super_csum_type(s);
	/*
         * csum type is validated at mount time
         */
	return btrfs_csum_sizes[t];
}

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josef bacik
josef bacik
25
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1
50.00%
david sterba
david sterba
2
7.41%
1
50.00%
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27
100.00%
2
100.00%



static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
{
	return offsetof(struct btrfs_leaf, items);
}

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chris mason
chris mason
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22
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2
100.00%

/*
 * The leaf data grows from end-to-front in the node.
 * this returns the address of the start of the last item,
 * which is the stop of the leaf data stack
 */


static inline unsigned int leaf_data_end(struct btrfs_fs_info *fs_info,
					 struct extent_buffer *leaf)
{
	u32 nr = btrfs_header_nritems(leaf);

	if (nr == 0)
		return BTRFS_LEAF_DATA_SIZE(fs_info);
	return btrfs_item_offset_nr(leaf, nr - 1);
}

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liu bo
liu bo
45
93.75%
1
33.33%
jeff mahoney
jeff mahoney
3
6.25%
2
66.67%
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48
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3
100.00%

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


static inline unsigned long

btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e)
{
	return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START;
}

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chris mason
chris mason
19
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2
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david sterba
david sterba
3
13.64%
1
33.33%
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22
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100.00%



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

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chris mason
chris mason
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david sterba
david sterba
1
6.67%
1
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15
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100.00%

BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
		   disk_bytenr, 64);
BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
		   generation, 64);
BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
		   disk_num_bytes, 64);
BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
		  offset, 64);
BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
		   num_bytes, 64);
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)
{
	return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START;
}

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chris mason
chris mason
26
96.30%
2
66.67%
david sterba
david sterba
1
3.70%
1
33.33%
Total
27
100.00%
3
100.00%

/* 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);
}


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chris mason
chris mason
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94
100.00%
2
100.00%

/* 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;
}

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stefan behrens
stefan behrens
64
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64
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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));
}

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stefan behrens
stefan behrens
61
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1
100.00%
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61
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/* 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);
BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
		   rescan, 64);

/* 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);

/* 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);

/* helper function to cast into the data area of the leaf. */

#define btrfs_item_ptr(leaf, slot, type) \
	((type *)(btrfs_leaf_data(leaf) + \
        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)))



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));
}

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josef bacik
josef bacik
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100.00%



static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping)
{
	return mapping_gfp_constraint(mapping, ~__GFP_FS);
}

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josef bacik
josef bacik
18
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1
50.00%
michal hocko
michal hocko
3
14.29%
1
50.00%
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21
100.00%
2
100.00%

/* extent-tree.c */

u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);



static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
						 unsigned num_items)
{
	return fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
}

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miao xie
miao xie
20
76.92%
1
20.00%
jeff mahoney
jeff mahoney
4
15.38%
2
40.00%
josef bacik
josef bacik
2
7.69%
2
40.00%
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26
100.00%
5
100.00%

/*
 * 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_fs_info *fs_info,
						 unsigned num_items)
{
	return fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
}

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josef bacik
josef bacik
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jeff mahoney
4
16.67%
2
66.67%
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24
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100.00%

int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_fs_info *fs_info);
int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans,
				       struct btrfs_fs_info *fs_info);
void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
					 const u64 start);
void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg);
bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr);
void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
			   struct btrfs_fs_info *fs_info, unsigned long count);
int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
				 unsigned long count, u64 transid, int wait);
int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len);
int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
			     struct btrfs_fs_info *fs_info, u64 bytenr,
			     u64 offset, int metadata, u64 *refs, u64 *flags);
int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
		     u64 bytenr, u64 num, int reserved);
int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
				    u64 bytenr, u64 num_bytes);
int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
				 struct extent_buffer *eb);
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root,
			  u64 objectid, u64 offset, u64 bytenr);
struct btrfs_block_group_cache *btrfs_lookup_block_group(
						 struct btrfs_fs_info *info,
						 u64 bytenr);
void btrfs_get_block_group(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
int get_block_group_index(struct btrfs_block_group_cache *cache);
struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
					struct btrfs_root *root, u64 parent,
					u64 root_objectid,
					struct btrfs_disk_key *key, int level,
					u64 hint, u64 empty_size);
void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct extent_buffer *buf,
			   u64 parent, int last_ref);
int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
				     u64 root_objectid, u64 owner,
				     u64 offset, u64 ram_bytes,
				     struct btrfs_key *ins);
int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans,
				   struct btrfs_fs_info *fs_info,
				   u64 root_objectid, u64 owner, u64 offset,
				   struct btrfs_key *ins);
int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes,
			 u64 min_alloc_size, u64 empty_size, u64 hint_byte,
			 struct btrfs_key *ins, int is_data, int delalloc);
int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		  struct extent_buffer *buf, int full_backref);
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		  struct extent_buffer *buf, int full_backref);
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
				struct btrfs_fs_info *fs_info,
				u64 bytenr, u64 num_bytes, u64 flags,
				int level, int is_data);
int btrfs_free_extent(struct btrfs_trans_handle *trans,
		      struct btrfs_fs_info *fs_info,
		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
		      u64 owner, u64 offset);

int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
			       u64 start, u64 len, int delalloc);
int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
				       u64 start, u64 len);
void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans,
				 struct btrfs_fs_info *fs_info);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
			       struct btrfs_fs_info *fs_info);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
			 struct btrfs_fs_info *fs_info,
			 u64 bytenr, u64 num_bytes, u64 parent,
			 u64 root_objectid, u64 owner, u64 offset);

int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans,
				   struct btrfs_fs_info *fs_info);
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
				   struct btrfs_fs_info *fs_info);
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
			    struct btrfs_fs_info *fs_info);
int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_fs_info *info);
int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr);
int btrfs_make_block_group(struct btrfs_trans_handle *trans,
			   struct btrfs_fs_info *fs_info, u64 bytes_used,
			   u64 type, u64 chunk_objectid, u64 chunk_offset,
			   u64 size);
struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
				struct btrfs_fs_info *fs_info,
				const u64 chunk_offset);
int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
			     struct btrfs_fs_info *fs_info, u64 group_start,
			     struct extent_map *em);
void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache);
void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans,
				       struct btrfs_fs_info *fs_info);
u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data);
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);


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,
};


enum btrfs_flush_state {
	
FLUSH_DELAYED_ITEMS_NR	=	1,
	
FLUSH_DELAYED_ITEMS	=	2,
	
FLUSH_DELALLOC		=	3,
	
FLUSH_DELALLOC_WAIT	=	4,
	
ALLOC_CHUNK		=	5,
	
COMMIT_TRANS		=	6,
};

int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len);
int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes);
void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len);
void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
					    u64 len);
void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
				  struct btrfs_fs_info *fs_info);
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
				  struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
				     struct btrfs_block_rsv *rsv,
				     int nitems,
				     u64 *qgroup_reserved, bool use_global_rsv);
void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info,
				      struct btrfs_block_rsv *rsv,
				      u64 qgroup_reserved);
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len);
void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len);
void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type);
struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info,
					      unsigned short type);
void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info,
			  struct btrfs_block_rsv *rsv);
void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv);
int btrfs_block_rsv_add(struct btrfs_root *root,
			struct btrfs_block_rsv *block_rsv, u64 num_bytes,
			enum btrfs_reserve_flush_enum flush);
int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor);
int btrfs_block_rsv_refill(struct btrfs_root *root,
			   struct btrfs_block_rsv *block_rsv, u64 min_reserved,
			   enum btrfs_reserve_flush_enum flush);
int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
			    struct btrfs_block_rsv *dst_rsv, u64 num_bytes,
			    int update_size);
int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *dest, u64 num_bytes,
			     int min_factor);
void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
			     struct btrfs_block_rsv *block_rsv,
			     u64 num_bytes);
int btrfs_inc_block_group_ro(struct btrfs_root *root,
			     struct btrfs_block_group_cache *cache);
void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache);
void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo);
int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
				   u64 start, u64 end);
int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
			 u64 num_bytes, u64 *actual_bytes);
int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans,
			    struct btrfs_fs_info *fs_info, u64 type);
int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range);

int btrfs_init_space_info(struct btrfs_fs_info *fs_info);
int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans,
					 struct btrfs_fs_info *fs_info);
int __get_raid_index(u64 flags);
int btrfs_start_write_no_snapshoting(struct btrfs_root *root);
void btrfs_end_write_no_snapshoting(struct btrfs_root *root);
void btrfs_wait_for_snapshot_creation(struct btrfs_root *root);
void check_system_chunk(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, const u64 type);
u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
		       struct btrfs_fs_info *info, u64 start, u64 end);

/* ctree.c */
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);
int btrfs_previous_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid,
			int type);
int btrfs_previous_extent_item(struct btrfs_root *root,
			struct btrfs_path *path, u64 min_objectid);
void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
			     struct btrfs_path *path,
			     struct btrfs_key *new_key);
struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
			struct btrfs_key *key, int lowest_level,
			u64 min_trans);
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
			 struct btrfs_path *path,
			 u64 min_trans);

enum btrfs_compare_tree_result {
	
BTRFS_COMPARE_TREE_NEW,
	
BTRFS_COMPARE_TREE_DELETED,
	
BTRFS_COMPARE_TREE_CHANGED,
	
BTRFS_COMPARE_TREE_SAME,
};

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);
int btrfs_cow_block(struct btrfs_trans_handle *trans,
		    struct btrfs_root *root, struct extent_buffer *buf,
		    struct extent_buffer *parent, int parent_slot,
		    struct extent_buffer **cow_ret);
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);
int btrfs_block_can_be_shared(struct btrfs_root *root,
			      struct extent_buffer *buf);
void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
		       u32 data_size);
void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
			 struct btrfs_path *path, u32 new_size, int from_end);
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);
int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root,
			 struct btrfs_path *path,
			 struct btrfs_key *new_key);
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);
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);
int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key,
			  struct btrfs_path *p, u64 time_seq);
int btrfs_search_slot_for_read(struct btrfs_root *root,
			       struct btrfs_key *key, struct btrfs_path *p,
			       int find_higher, int return_any);
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct extent_buffer *parent,
		       int start_slot, u64 *last_ret,
		       struct btrfs_key *progress);
void btrfs_release_path(struct btrfs_path *p);
struct btrfs_path *btrfs_alloc_path(void);
void btrfs_free_path(struct btrfs_path *p);
void btrfs_set_path_blocking(struct btrfs_path *p);
void btrfs_clear_path_blocking(struct btrfs_path *p,
			       struct extent_buffer *held, int held_rw);
void btrfs_unlock_up_safe(struct btrfs_path *p, int level);

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);
}

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chris mason
chris mason
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void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
			    struct btrfs_key *cpu_key, u32 *data_size,
			    u32 total_data, u32 total_size, int nr);
int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, void *data, u32 data_size);
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);
}

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chris mason
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int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path,
			u64 time_seq);


static inline int btrfs_next_old_item(struct btrfs_root *root,
				      struct btrfs_path *p, u64 time_seq)
{
	++p->slots[0];
	if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
		return btrfs_next_old_leaf(root, p, time_seq);
	return 0;
}
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60
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2
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static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
	return btrfs_next_old_item(root, p, 0);
}
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int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
			  struct extent_buffer *leaf);
int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
				     struct btrfs_block_rsv *block_rsv,
				     int update_ref, int for_reloc);
int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct extent_buffer *node,
			struct extent_buffer *parent);


static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info)
{
	/*
         * Do it this way so we only ever do one test_bit in the normal case.
         */
	if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {
		if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))
			return 2;
		return 1;
	}
	return 0;
}

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48
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/*
 * 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_fs_info *fs_info)
{
	return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info);
}

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26
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3
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static inline void free_fs_info(struct btrfs_fs_info *fs_info)
{
	kfree(fs_info->balance_ctl);
	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);
	kfree(fs_info->quota_root);
	kfree(fs_info->uuid_root);
	kfree(fs_info->free_space_root);
	kfree(fs_info->super_copy);
	kfree(fs_info->super_for_commit);
	security_free_mnt_opts(&fs_info->security_opts);
	kfree(fs_info);
}

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david sterba
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qu wenruo
8
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1
16.67%
arne jansen
arne jansen
7
6.42%
1
16.67%
filipe david borba manana
filipe david borba manana
7
6.42%
1
16.67%
ilya dryomov
ilya dryomov
7
6.42%
1
16.67%
omar sandoval
omar sandoval
7
6.42%
1
16.67%
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109
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6
100.00%

/* 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);
int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq);

/* root-item.c */
int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
		       struct btrfs_fs_info *fs_info,
		       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_fs_info *fs_info,
		       u64 root_id, u64 ref_id, u64 dirid, u64 *sequence,
		       const char *name, int name_len);
int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
		   struct btrfs_key *key);
int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
		      *root, struct btrfs_key *key, struct btrfs_root_item
		      *item);
int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
				   struct btrfs_root *root,
				   struct btrfs_key *key,
				   struct btrfs_root_item *item);
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);
int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info);
void btrfs_set_root_node(struct btrfs_root_item *item,
			 struct extent_buffer *node);
void btrfs_check_and_init_root_item(struct btrfs_root_item *item);
void btrfs_update_root_times(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root);

/* uuid-tree.c */
int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
			u64 subid);
int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans,
			struct btrfs_fs_info *fs_info, u8 *uuid, u8 type,
			u64 subid);
int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
			    int (*check_func)(struct btrfs_fs_info *, u8 *, u8,
					      u64));

/* dir-item.c */
int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir,
			  const char *name, int name_len);
int btrfs_insert_dir_item(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, const char *name,
			  int name_len, struct inode *dir,
			  struct btrfs_key *location, u8 type, u64 index);
struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
					     struct btrfs_root *root,
					     struct btrfs_path *path, u64 dir,
					     const char *name, int name_len,
					     int mod);
struct btrfs_dir_item *
btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 dir,
			    u64 objectid, const char *name, int name_len,
			    int mod);
struct btrfs_dir_item *
btrfs_search_dir_index_item(struct btrfs_root *root,
			    struct btrfs_path *path, u64 dirid,
			    const char *name, int name_len);
int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct btrfs_path *path,
			      struct btrfs_dir_item *di);
int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
			    struct btrfs_root *root,
			    struct btrfs_path *path, u64 objectid,
			    const char *name, u16 name_len,
			    const void *data, u16 data_len);
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);
int verify_dir_item(struct btrfs_fs_info *fs_info,
		    struct extent_buffer *leaf,
		    struct btrfs_dir_item *dir_item);
struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info,
						 struct btrfs_path *path,
						 const char *name,
						 int name_len);

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

/* inode-item.c */
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   u64 inode_objectid, u64 ref_objectid, u64 index);
int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   const char *name, int name_len,
			   u64 inode_objectid, u64 ref_objectid, u64 *index);
int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid);
int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
		       *root, struct btrfs_path *path,
		       struct btrfs_key *location, int mod);

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);

/* file-item.c */
struct btrfs_dio_private;
int btrfs_del_csums(struct btrfs_trans_handle *trans,
		    struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
int btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst);
int btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio,
			      u64 logical_offset);
int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
			     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);
int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
			     struct btrfs_root *root,
			     struct btrfs_path *path, u64 objectid,
			     u64 bytenr, int mod);
int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
			   struct btrfs_root *root,
			   struct btrfs_ordered_sum *sums);
int btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
		       u64 file_start, int contig);
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
			     struct list_head *list, int search_commit);
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);

/* inode.c */

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

struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
					   size_t pg_offset, u64 start, u64 len,
					   int create);
noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
			      u64 *orig_start, u64 *orig_block_len,
			      u64 *ram_bytes);

/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)

#define ClearPageChecked ClearPageFsMisc

#define SetPageChecked SetPageFsMisc

#define PageChecked PageFsMisc
#endif

/* 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);
}

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struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
int btrfs_set_inode_index(struct inode *dir, u64 *index);
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);
int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
			struct btrfs_root *root,
			struct inode *dir, u64 objectid,
			const char *name, int name_len);
int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
			int front);
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
			       struct btrfs_root *root,
			       struct inode *inode, u64 new_size,
			       u32 min_type);

int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput);
int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput,
			       int nr);
int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
			      struct extent_state **cached_state, int dedupe);
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
			     struct btrfs_root *new_root,
			     struct btrfs_root *parent_root,
			     u64 new_dirid);
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
			 size_t size, struct bio *bio,
			 unsigned long bio_flags);
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
int btrfs_readpage(struct file *file, struct page *page);
void btrfs_evict_inode(struct inode *inode);
int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
struct inode *btrfs_alloc_inode(struct super_block *sb);
void btrfs_destroy_inode(struct inode *inode);
int btrfs_drop_inode(struct inode *inode);
int btrfs_init_cachep(void);
void btrfs_destroy_cachep(void);
long btrfs_ioctl_trans_end(struct file *file);
struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
			 struct btrfs_root *root, int *was_new);
struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
				    size_t pg_offset, u64 start, u64 end,
				    int create);
int btrfs_update_inode(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root,
			      struct inode *inode);
int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
				struct btrfs_root *root, struct inode *inode);
int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
int btrfs_orphan_cleanup(struct btrfs_root *root);
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
			      struct btrfs_root *root);
int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
void btrfs_invalidate_inodes(struct btrfs_root *root);
void btrfs_add_delayed_iput(struct inode *inode);
void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
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);
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);
extern const struct dentry_operations btrfs_dentry_operations;
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);
#endif

/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int btrfs_ioctl_get_supported_features(void __user *arg);
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
int btrfs_is_empty_uuid(u8 *uuid);
int btrfs_defrag_file(struct inode *inode, struct file *file,
		      struct btrfs_ioctl_defrag_range_args *range,
		      u64 newer_than, unsigned long max_pages);
void btrfs_get_block_group_info(struct list_head *groups_list,
				struct btrfs_ioctl_space_info *space);
void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock,
			       struct btrfs_ioctl_balance_args *bargs);
ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
			   struct file *dst_file, u64 dst_loff);

/* file.c */
int btrfs_auto_defrag_init(void);
void btrfs_auto_defrag_exit(void);
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
			   struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info);
int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
			     int skip_pinned);
extern const struct file_operations btrfs_file_operations;
int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
			 struct btrfs_root *root, struct inode *inode,
			 struct btrfs_path *path, u64 start, u64 end,
			 u64 *drop_end, int drop_cache,
			 int replace_extent,
			 u32 extent_item_size,
			 int *key_inserted);
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
		       struct btrfs_root *root, struct inode *inode, u64 start,
		       u64 end, int drop_cache);
int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
			      struct inode *inode, u64 start, u64 end);
int btrfs_release_file(struct inode *inode, struct file *file);
int btrfs_dirty_pages(struct inode *inode, struct page **pages,
		      size_t num_pages, loff_t pos, size_t write_bytes,
		      struct extent_state **cached);
int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end);
int btrfs_clone_file_range(struct file *file_in, loff_t pos_in,
			   struct file *file_out, loff_t pos_out, u64 len);

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

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

/* xattr.c */
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);

/* super.c */
int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
			unsigned long new_flags);
int btrfs_sync_fs(struct super_block *sb, int wait);

static inline __printf(2, 3)

void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
}

#ifdef CONFIG_PRINTK
__printf(2, 3)
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
#else

#define btrfs_printk(fs_info, fmt, args...) \
	btrfs_no_printk(fs_info, fmt, ##args)
#endif


#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)

/*
 * 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)

/*
 * 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)

/*
 * 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)

#if defined(CONFIG_DYNAMIC_DEBUG)

#define btrfs_debug(fs_info, fmt, args...)				\
do {                                                                    \
        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))          \
                btrfs_printk(fs_info, KERN_DEBUG fmt, ##args);          \
} while (0)

#define btrfs_debug_in_rcu(fs_info, fmt, args...) 			\
do {                                                                    \
        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))          \
                btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args);   \
} while (0)

#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...)			\
do {                                                                    \
        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))          \
                btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt,         \
                                       ##args);\
} while (0)

#define btrfs_debug_rl(fs_info, fmt, args...) 				\
do {                                                                    \
        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);                 \
        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))          \
                btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt,       \
                                         ##args);                       \
} while (0)
#elif defined(DEBUG)

#define btrfs_debug(fs_info, fmt, args...) \
	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_rl(fs_info, fmt, args...) \
	btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args)
#else

#define btrfs_debug(fs_info, fmt, args...) \
	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_in_rcu(fs_info, fmt, args...) \
	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \
	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)

#define btrfs_debug_rl(fs_info, fmt, args...) \
	btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args)
#endif


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


#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)

#ifdef CONFIG_BTRFS_ASSERT


__cold

static inline void assfail(char *expr, char *file, int line)
{
	pr_err("assertion failed: %s, file: %s, line: %d\n",
	       expr, file, line);
	BUG();
}

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

#define ASSERT(expr)	((void)0)
#endif

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

const char *btrfs_decode_error(int errno);

__cold
void __btrfs_abort_transaction(struct btrfs_trans_handle *trans,
			       const char *function,
			       unsigned int line, int errno);

/*
 * Call btrfs_abort_transaction as early as possible when an error condition is
 * detected, that way the exact line number is reported.
 */

#define btrfs_abort_transaction(trans, errno)		\
do {                                                            \
	/* Report first abort since mount */			\
        if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED,     \
                        &((trans)->fs_info->fs_state))) {       \
                if ((errno) != -EIO) {                          \
                        WARN(1, KERN_DEBUG                              \
                        "BTRFS: Transaction aborted (error %d)\n",      \
                        (errno));                                       \
                } else {                                                \
                        pr_debug("BTRFS: Transaction aborted (error %d)\n", \
                                  (errno));                     \
                }                                               \
        }                                                       \
        __btrfs_abort_transaction((trans), __func__,            \
                                  __LINE__, (errno));           \
} while (0)


#define btrfs_handle_fs_error(fs_info, errno, fmt, args...)		\
do {                                                            \
        __btrfs_handle_fs_error((fs_info), __func__, __LINE__,  \
                          (errno), fmt, ##args);                \
} while (0)

__printf(5, 6)
__cold
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
		   unsigned int line, int errno, const char *fmt, ...);
/*
 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
 * will panic().  Otherwise we BUG() here.
 */

#define btrfs_panic(fs_info, errno, fmt, args...)			\
do {                                                                    \
        __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
        BUG();                                                          \
} while (0)


/* compatibility and incompatibility defines */


#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)) {
		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, "setting %llu feature flag",
					 flag);
		}
		spin_unlock(&fs_info->super_lock);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
mitch harder
mitch harder
58
57.43%
1
33.33%
miao xie
miao xie
39
38.61%
1
33.33%
frank holton
frank holton
4
3.96%
1
33.33%
Total
101
100.00%
3
100.00%


#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);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
omar sandoval
omar sandoval
69
71.88%
1
50.00%
josef bacik
josef bacik
27
28.12%
1
50.00%
Total
96
100.00%
2
100.00%


#define btrfs_fs_incompat(fs_info, opt) \
	__btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)



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

Contributors
Person
Tokens
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Commits
CommitProp
josef bacik
josef bacik
37
97.37%
1
50.00%
chris mason
chris mason
1
2.63%
1
50.00%
Total
38
100.00%
2
100.00%


#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);
	}
}

Contributors
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CommitProp
omar sandoval
omar sandoval
101
100.00%
1
100.00%
Total
101
100.00%
1
100.00%


#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);
	}
}

Contributors
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CommitProp
omar sandoval
omar sandoval
96
100.00%
1
100.00%
Total
96
100.00%
1
100.00%


#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);
}

Contributors
Person
Tokens
Prop
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CommitProp
omar sandoval
omar sandoval
32
84.21%
1
50.00%
josef bacik
josef bacik
6
15.79%
1
50.00%
Total
38
100.00%
2
100.00%

/* acl.c */
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
int btrfs_init_acl(struct btrfs_trans_handle *trans,
		   struct inode *inode, struct inode *dir);
#else

#define btrfs_get_acl NULL

#define btrfs_set_acl NULL


static inline int btrfs_init_acl(struct btrfs_trans_handle *trans,
				 struct inode *inode, struct inode *dir)
{
	return 0;
}
Contributors
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CommitProp
josef bacik
josef bacik
13
52.00%
1
33.33%
li zefan
li zefan
7
28.00%
1
33.33%
zheng yan
zheng yan
5
20.00%
1
33.33%
Total
25
100.00%
3
100.00%

#endif

/* relocation.c */
int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, 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);
int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
			  struct btrfs_root *root, struct extent_buffer *buf,
			  struct extent_buffer *cow);
void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
			      u64 *bytes_to_reserve);
int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
			      struct btrfs_pending_snapshot *pending);

/* scrub.c */
int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
		    u64 end, struct btrfs_scrub_progress *progress,
		    int readonly, int is_dev_replace);
void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
int btrfs_scrub_cancel(struct btrfs_fs_info *info);
int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
			   struct btrfs_device *dev);
int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
			 struct btrfs_scrub_progress *progress);

/* 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);
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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miao xie
miao xie
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%

/* reada.c */

struct reada_control {
	
struct btrfs_fs_info	*fs_info;		/* 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_fs_info *fs_info,
			 struct extent_buffer *eb, int err);



static inline int is_fstree(u64 rootid)
{
	if (rootid == BTRFS_FS_TREE_OBJECTID ||
	    ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID &&
	      !btrfs_qgroup_level(rootid)))
		return 1;
	return 0;
}

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jan schmidt
jan schmidt
32
80.00%
1
50.00%
qu wenruo
qu wenruo
8
20.00%
1
50.00%
Total
40
100.00%
2
100.00%



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

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david sterba
david sterba
18
100.00%
1
100.00%
Total
18
100.00%
1
100.00%

/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_destroy_inode(struct inode *inode);
#endif



static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info)
{
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
	if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO,
			      &fs_info->fs_state)))
		return 1;
#endif
	return 0;
}
Contributors
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Tokens
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Commits
CommitProp
david sterba
david sterba
32
84.21%
1
50.00%
jeff mahoney
jeff mahoney
6
15.79%
1
50.00%
Total
38
100.00%
2
100.00%

#endif
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
chris mason
chris mason
6020
37.13%
186
30.29%
zheng yan
zheng yan
1629
10.05%
37
6.03%
josef bacik
josef bacik
1543
9.52%
89
14.50%
jeff mahoney
jeff mahoney
1059
6.53%
29
4.72%
david sterba
david sterba
769
4.74%
31
5.05%
miao xie
miao xie
652
4.02%
39
6.35%
stefan behrens
stefan behrens
575
3.55%
19
3.09%
ilya dryomov
ilya dryomov
563
3.47%
7
1.14%
arne jansen
arne jansen
539
3.32%
10
1.63%
qu wenruo
qu wenruo
507
3.13%
25
4.07%
omar sandoval
omar sandoval
433
2.67%
6
0.98%
filipe david borba manana
filipe david borba manana
236
1.46%
23
3.75%
jan schmidt
jan schmidt
221
1.36%
11
1.79%
alexander block
alexander block
184
1.13%
3
0.49%
li zefan
li zefan
170
1.05%
10
1.63%
christoph hellwig
christoph hellwig
130
0.80%
8
1.30%
mark fasheh
mark fasheh
106
0.65%
2
0.33%
simon kirby
simon kirby
105
0.65%
1
0.16%
liu bo
liu bo
104
0.64%
8
1.30%
anand jain
anand jain
83
0.51%
5
0.81%
arnd bergmann
arnd bergmann
71
0.44%
1
0.16%
mitch harder
mitch harder
68
0.42%
1
0.16%
wang shilong
wang shilong
54
0.33%
4
0.65%
sage weil
sage weil
53
0.33%
6
0.98%
david woodhouse
david woodhouse
51
0.31%
1
0.16%
kelley nielsen
kelley nielsen
28
0.17%
1
0.16%
darrick j. wong
darrick j. wong
23
0.14%
1
0.16%
frank holton
frank holton
22
0.14%
2
0.33%
yan zheng
yan zheng
22
0.14%
3
0.49%
zhao lei
zhao lei
21
0.13%
7
1.14%
joe perches
joe perches
20
0.12%
1
0.16%
al viro
al viro
18
0.11%
5
0.81%
balaji rao
balaji rao
18
0.11%
1
0.16%
luke dashjr
luke dashjr
17
0.10%
1
0.16%
li dongyang
li dongyang
16
0.10%
2
0.33%
geert uytterhoeven
geert uytterhoeven
16
0.10%
5
0.81%
chandan rajendra
chandan rajendra
11
0.07%
2
0.33%
wang xiaoguang
wang xiaoguang
11
0.07%
4
0.65%
eric sandeen
eric sandeen
11
0.07%
1
0.16%
filipe brandenburger
filipe brandenburger
4
0.02%
1
0.16%
josef whiter
josef whiter
3
0.02%
1
0.16%
michal hocko
michal hocko
3
0.02%
1
0.16%
tejun heo
tejun heo
3
0.02%
1
0.16%
byongho lee
byongho lee
3
0.02%
1
0.16%
stefan schmidt
stefan schmidt
3
0.02%
1
0.16%
mariusz kozlowski
mariusz kozlowski
2
0.01%
1
0.16%
alexey dobriyan
alexey dobriyan
2
0.01%
2
0.33%
daniel dressler
daniel dressler
2
0.01%
1
0.16%
zach brown
zach brown
2
0.01%
1
0.16%
nick piggin
nick piggin
2
0.01%
1
0.16%
lucas de marchi
lucas de marchi
1
0.01%
1
0.16%
nicholas d steeves
nicholas d steeves
1
0.01%
1
0.16%
ross kirk
ross kirk
1
0.01%
1
0.16%
gabriel arthur petursson
gabriel arthur petursson
1
0.01%
1
0.16%
Total
16212
100.00%
614
100.00%
Directory: fs/btrfs

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