2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle
;
35 struct btrfs_transaction
;
36 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
37 extern struct kmem_cache
*btrfs_transaction_cachep
;
38 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
39 extern struct kmem_cache
*btrfs_path_cachep
;
41 #define BTRFS_MAGIC "_B5RfS_M"
43 #define BTRFS_MAX_LEVEL 8
45 /* holds pointers to all of the tree roots */
46 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
48 /* stores information about which extents are in use, and reference counts */
49 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
52 * chunk tree stores translations from logical -> physical block numbering
53 * the super block points to the chunk tree
55 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
58 * stores information about which areas of a given device are in use.
59 * one per device. The tree of tree roots points to the device tree
61 #define BTRFS_DEV_TREE_OBJECTID 4ULL
63 /* one per subvolume, storing files and directories */
64 #define BTRFS_FS_TREE_OBJECTID 5ULL
66 /* directory objectid inside the root tree */
67 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 * All files have objectids higher than this.
72 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
73 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
77 * the device items go into the chunk tree. The key is in the form
78 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
80 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
83 * we can actually store much bigger names, but lets not confuse the rest
86 #define BTRFS_NAME_LEN 255
88 /* 32 bytes in various csum fields */
89 #define BTRFS_CSUM_SIZE 32
90 /* four bytes for CRC32 */
91 #define BTRFS_CRC32_SIZE 4
92 #define BTRFS_EMPTY_DIR_SIZE 0
94 #define BTRFS_FT_UNKNOWN 0
95 #define BTRFS_FT_REG_FILE 1
96 #define BTRFS_FT_DIR 2
97 #define BTRFS_FT_CHRDEV 3
98 #define BTRFS_FT_BLKDEV 4
99 #define BTRFS_FT_FIFO 5
100 #define BTRFS_FT_SOCK 6
101 #define BTRFS_FT_SYMLINK 7
102 #define BTRFS_FT_XATTR 8
103 #define BTRFS_FT_MAX 9
106 * the key defines the order in the tree, and so it also defines (optimal)
107 * block layout. objectid corresonds to the inode number. The flags
108 * tells us things about the object, and is a kind of stream selector.
109 * so for a given inode, keys with flags of 1 might refer to the inode
110 * data, flags of 2 may point to file data in the btree and flags == 3
111 * may point to extents.
113 * offset is the starting byte offset for this key in the stream.
115 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
116 * in cpu native order. Otherwise they are identical and their sizes
117 * should be the same (ie both packed)
119 struct btrfs_disk_key
{
123 } __attribute__ ((__packed__
));
129 } __attribute__ ((__packed__
));
131 struct btrfs_mapping_tree
{
132 struct extent_map_tree map_tree
;
135 #define BTRFS_UUID_SIZE 16
136 struct btrfs_dev_item
{
137 /* the internal btrfs device id */
140 /* size of the device */
146 /* optimal io alignment for this device */
149 /* optimal io width for this device */
152 /* minimal io size for this device */
155 /* type and info about this device */
158 /* grouping information for allocation decisions */
161 /* seek speed 0-100 where 100 is fastest */
164 /* bandwidth 0-100 where 100 is fastest */
167 /* btrfs generated uuid for this device */
168 u8 uuid
[BTRFS_UUID_SIZE
];
169 } __attribute__ ((__packed__
));
171 struct btrfs_stripe
{
174 u8 dev_uuid
[BTRFS_UUID_SIZE
];
175 } __attribute__ ((__packed__
));
178 /* size of this chunk in bytes */
181 /* objectid of the root referencing this chunk */
187 /* optimal io alignment for this chunk */
190 /* optimal io width for this chunk */
193 /* minimal io size for this chunk */
196 /* 2^16 stripes is quite a lot, a second limit is the size of a single
201 /* sub stripes only matter for raid10 */
203 struct btrfs_stripe stripe
;
204 /* additional stripes go here */
205 } __attribute__ ((__packed__
));
207 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
209 BUG_ON(num_stripes
== 0);
210 return sizeof(struct btrfs_chunk
) +
211 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
214 #define BTRFS_FSID_SIZE 16
215 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
218 * every tree block (leaf or node) starts with this header.
220 struct btrfs_header
{
221 /* these first four must match the super block */
222 u8 csum
[BTRFS_CSUM_SIZE
];
223 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
224 __le64 bytenr
; /* which block this node is supposed to live in */
227 /* allowed to be different from the super from here on down */
228 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
233 } __attribute__ ((__packed__
));
235 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
236 sizeof(struct btrfs_header)) / \
237 sizeof(struct btrfs_key_ptr))
238 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
239 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
240 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
241 sizeof(struct btrfs_item) - \
242 sizeof(struct btrfs_file_extent_item))
246 * this is a very generous portion of the super block, giving us
247 * room to translate 14 chunks with 3 stripes each.
249 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
250 #define BTRFS_LABEL_SIZE 256
253 * the super block basically lists the main trees of the FS
254 * it currently lacks any block count etc etc
256 struct btrfs_super_block
{
257 u8 csum
[BTRFS_CSUM_SIZE
];
258 /* the first 4 fields must match struct btrfs_header */
259 u8 fsid
[16]; /* FS specific uuid */
260 __le64 bytenr
; /* this block number */
263 /* allowed to be different from the btrfs_header from here own down */
270 __le64 root_dir_objectid
;
276 __le32 sys_chunk_array_size
;
279 struct btrfs_dev_item dev_item
;
280 char label
[BTRFS_LABEL_SIZE
];
281 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
282 } __attribute__ ((__packed__
));
285 * A leaf is full of items. offset and size tell us where to find
286 * the item in the leaf (relative to the start of the data area)
289 struct btrfs_disk_key key
;
292 } __attribute__ ((__packed__
));
295 * leaves have an item area and a data area:
296 * [item0, item1....itemN] [free space] [dataN...data1, data0]
298 * The data is separate from the items to get the keys closer together
302 struct btrfs_header header
;
303 struct btrfs_item items
[];
304 } __attribute__ ((__packed__
));
307 * all non-leaf blocks are nodes, they hold only keys and pointers to
310 struct btrfs_key_ptr
{
311 struct btrfs_disk_key key
;
314 } __attribute__ ((__packed__
));
317 struct btrfs_header header
;
318 struct btrfs_key_ptr ptrs
[];
319 } __attribute__ ((__packed__
));
322 * btrfs_paths remember the path taken from the root down to the leaf.
323 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
324 * to any other levels that are present.
326 * The slots array records the index of the item or block pointer
327 * used while walking the tree.
330 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
331 int slots
[BTRFS_MAX_LEVEL
];
332 /* if there is real range locking, this locks field will change */
333 int locks
[BTRFS_MAX_LEVEL
];
335 /* keep some upper locks as we walk down */
342 * items in the extent btree are used to record the objectid of the
343 * owner of the block and the number of references
345 struct btrfs_extent_item
{
347 } __attribute__ ((__packed__
));
349 struct btrfs_extent_ref
{
354 } __attribute__ ((__packed__
));
356 /* dev extents record free space on individual devices. The owner
357 * field points back to the chunk allocation mapping tree that allocated
358 * the extent. The chunk tree uuid field is a way to double check the owner
360 struct btrfs_dev_extent
{
362 __le64 chunk_objectid
;
365 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
366 } __attribute__ ((__packed__
));
368 struct btrfs_inode_ref
{
371 } __attribute__ ((__packed__
));
373 struct btrfs_timespec
{
376 } __attribute__ ((__packed__
));
379 * there is no padding here on purpose. If you want to extent the inode,
380 * make a new item type
382 struct btrfs_inode_item
{
394 struct btrfs_timespec atime
;
395 struct btrfs_timespec ctime
;
396 struct btrfs_timespec mtime
;
397 struct btrfs_timespec otime
;
398 } __attribute__ ((__packed__
));
400 struct btrfs_dir_item
{
401 struct btrfs_disk_key location
;
405 } __attribute__ ((__packed__
));
407 struct btrfs_root_item
{
408 struct btrfs_inode_item inode
;
415 struct btrfs_disk_key drop_progress
;
418 } __attribute__ ((__packed__
));
420 #define BTRFS_FILE_EXTENT_REG 0
421 #define BTRFS_FILE_EXTENT_INLINE 1
423 struct btrfs_file_extent_item
{
427 * disk space consumed by the extent, checksum blocks are included
431 __le64 disk_num_bytes
;
433 * the logical offset in file blocks (no csums)
434 * this extent record is for. This allows a file extent to point
435 * into the middle of an existing extent on disk, sharing it
436 * between two snapshots (useful if some bytes in the middle of the
437 * extent have changed
441 * the logical number of file blocks (no csums included)
444 } __attribute__ ((__packed__
));
446 struct btrfs_csum_item
{
448 } __attribute__ ((__packed__
));
450 /* different types of block groups (and chunks) */
451 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
452 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
453 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
454 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
455 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
456 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
457 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
460 struct btrfs_block_group_item
{
462 __le64 chunk_objectid
;
464 } __attribute__ ((__packed__
));
466 struct btrfs_space_info
{
473 struct list_head list
;
476 struct btrfs_block_group_cache
{
477 struct btrfs_key key
;
478 struct btrfs_block_group_item item
;
479 struct btrfs_space_info
*space_info
;
487 struct btrfs_fs_devices
;
488 struct btrfs_fs_info
{
489 u8 fsid
[BTRFS_FSID_SIZE
];
490 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
491 struct btrfs_root
*extent_root
;
492 struct btrfs_root
*tree_root
;
493 struct btrfs_root
*chunk_root
;
494 struct btrfs_root
*dev_root
;
495 struct radix_tree_root fs_roots_radix
;
497 struct extent_io_tree free_space_cache
;
498 struct extent_io_tree block_group_cache
;
499 struct extent_io_tree pinned_extents
;
500 struct extent_io_tree pending_del
;
501 struct extent_io_tree extent_ins
;
503 /* logical->physical extent mapping */
504 struct btrfs_mapping_tree mapping_tree
;
507 u64 last_trans_committed
;
508 unsigned long mount_opt
;
512 struct btrfs_transaction
*running_transaction
;
513 struct btrfs_super_block super_copy
;
514 struct btrfs_super_block super_for_commit
;
515 struct block_device
*__bdev
;
516 struct super_block
*sb
;
517 struct inode
*btree_inode
;
518 struct backing_dev_info bdi
;
519 spinlock_t hash_lock
;
520 struct mutex trans_mutex
;
521 struct mutex transaction_kthread_mutex
;
522 struct mutex cleaner_mutex
;
523 struct mutex alloc_mutex
;
524 struct mutex chunk_mutex
;
525 struct mutex drop_mutex
;
526 struct mutex volume_mutex
;
527 struct list_head trans_list
;
528 struct list_head hashers
;
529 struct list_head dead_roots
;
530 atomic_t nr_async_submits
;
533 * there is a pool of worker threads for checksumming during writes
534 * and a pool for checksumming after reads. This is because readers
535 * can run with FS locks held, and the writers may be waiting for
536 * those locks. We don't want ordering in the pending list to cause
537 * deadlocks, and so the two are serviced separately.
539 * A third pool does submit_bio to avoid deadlocking with the other
542 struct btrfs_workers workers
;
543 struct btrfs_workers endio_workers
;
544 struct btrfs_workers submit_workers
;
545 struct task_struct
*transaction_kthread
;
546 struct task_struct
*cleaner_kthread
;
547 int thread_pool_size
;
549 struct kobject super_kobj
;
550 struct completion kobj_unregister
;
556 struct list_head dirty_cowonly_roots
;
558 struct btrfs_fs_devices
*fs_devices
;
559 struct list_head space_info
;
560 spinlock_t delalloc_lock
;
561 spinlock_t new_trans_lock
;
566 u64 avail_data_alloc_bits
;
567 u64 avail_metadata_alloc_bits
;
568 u64 avail_system_alloc_bits
;
569 u64 data_alloc_profile
;
570 u64 metadata_alloc_profile
;
571 u64 system_alloc_profile
;
577 * in ram representation of the tree. extent_root is used for all allocations
578 * and for the extent tree extent_root root.
581 struct extent_buffer
*node
;
583 /* the node lock is held while changing the node pointer */
584 spinlock_t node_lock
;
586 struct extent_buffer
*commit_root
;
587 struct btrfs_root_item root_item
;
588 struct btrfs_key root_key
;
589 struct btrfs_fs_info
*fs_info
;
591 struct kobject root_kobj
;
592 struct completion kobj_unregister
;
593 struct mutex objectid_mutex
;
597 /* data allocations are done in sectorsize units */
600 /* node allocations are done in nodesize units */
603 /* leaf allocations are done in leafsize units */
610 u64 last_inode_alloc
;
613 u64 defrag_trans_start
;
614 struct btrfs_key defrag_progress
;
615 struct btrfs_key defrag_max
;
621 /* the dirty list is only used by non-reference counted roots */
622 struct list_head dirty_list
;
627 * inode items have the data typically returned from stat and store other
628 * info about object characteristics. There is one for every file and dir in
631 #define BTRFS_INODE_ITEM_KEY 1
632 #define BTRFS_INODE_REF_KEY 2
633 #define BTRFS_XATTR_ITEM_KEY 8
634 /* reserve 2-15 close to the inode for later flexibility */
637 * dir items are the name -> inode pointers in a directory. There is one
638 * for every name in a directory.
640 #define BTRFS_DIR_ITEM_KEY 16
641 #define BTRFS_DIR_INDEX_KEY 17
643 * extent data is for file data
645 #define BTRFS_EXTENT_DATA_KEY 18
647 * csum items have the checksums for data in the extents
649 #define BTRFS_CSUM_ITEM_KEY 19
651 /* reserve 20-31 for other file stuff */
654 * root items point to tree roots. There are typically in the root
655 * tree used by the super block to find all the other trees
657 #define BTRFS_ROOT_ITEM_KEY 32
659 * extent items are in the extent map tree. These record which blocks
660 * are used, and how many references there are to each block
662 #define BTRFS_EXTENT_ITEM_KEY 33
663 #define BTRFS_EXTENT_REF_KEY 34
666 * block groups give us hints into the extent allocation trees. Which
667 * blocks are free etc etc
669 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
671 #define BTRFS_DEV_EXTENT_KEY 75
672 #define BTRFS_DEV_ITEM_KEY 76
673 #define BTRFS_CHUNK_ITEM_KEY 77
676 * string items are for debugging. They just store a short string of
679 #define BTRFS_STRING_ITEM_KEY 253
681 #define BTRFS_MOUNT_NODATASUM (1 << 0)
682 #define BTRFS_MOUNT_NODATACOW (1 << 1)
683 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
684 #define BTRFS_MOUNT_SSD (1 << 3)
685 #define BTRFS_MOUNT_DEGRADED (1 << 4)
687 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
688 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
689 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
694 #define BTRFS_INODE_NODATASUM (1 << 0)
695 #define BTRFS_INODE_NODATACOW (1 << 1)
696 #define BTRFS_INODE_READONLY (1 << 2)
697 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
699 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
701 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
703 /* some macros to generate set/get funcs for the struct fields. This
704 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
707 #define le8_to_cpu(v) (v)
708 #define cpu_to_le8(v) (v)
711 #define read_eb_member(eb, ptr, type, member, result) ( \
712 read_extent_buffer(eb, (char *)(result), \
713 ((unsigned long)(ptr)) + \
714 offsetof(type, member), \
715 sizeof(((type *)0)->member)))
717 #define write_eb_member(eb, ptr, type, member, result) ( \
718 write_extent_buffer(eb, (char *)(result), \
719 ((unsigned long)(ptr)) + \
720 offsetof(type, member), \
721 sizeof(((type *)0)->member)))
723 #ifndef BTRFS_SETGET_FUNCS
724 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
725 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
726 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
729 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
730 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
732 type *p = kmap_atomic(eb->first_page, KM_USER0); \
733 u##bits res = le##bits##_to_cpu(p->member); \
734 kunmap_atomic(p, KM_USER0); \
737 static inline void btrfs_set_##name(struct extent_buffer *eb, \
740 type *p = kmap_atomic(eb->first_page, KM_USER0); \
741 p->member = cpu_to_le##bits(val); \
742 kunmap_atomic(p, KM_USER0); \
745 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
746 static inline u##bits btrfs_##name(type *s) \
748 return le##bits##_to_cpu(s->member); \
750 static inline void btrfs_set_##name(type *s, u##bits val) \
752 s->member = cpu_to_le##bits(val); \
755 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
756 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
757 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
758 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
759 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
760 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
761 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
762 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
763 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
764 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
766 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
767 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
769 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
771 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
773 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
775 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
777 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
778 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
780 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
782 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
785 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
787 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
790 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
791 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
792 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
793 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
794 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
795 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
796 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
797 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
798 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
799 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
800 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
802 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
804 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
807 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
808 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
809 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
811 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
813 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
815 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
817 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
818 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
820 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
822 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
823 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
825 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
828 unsigned long offset
= (unsigned long)c
;
829 offset
+= offsetof(struct btrfs_chunk
, stripe
);
830 offset
+= nr
* sizeof(struct btrfs_stripe
);
831 return (struct btrfs_stripe
*)offset
;
834 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
836 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
839 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
840 struct btrfs_chunk
*c
, int nr
)
842 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
845 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
846 struct btrfs_chunk
*c
, int nr
,
849 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
852 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
853 struct btrfs_chunk
*c
, int nr
)
855 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
858 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
859 struct btrfs_chunk
*c
, int nr
,
862 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
865 /* struct btrfs_block_group_item */
866 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
868 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
870 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
871 struct btrfs_block_group_item
, chunk_objectid
, 64);
873 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
874 struct btrfs_block_group_item
, chunk_objectid
, 64);
875 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
876 struct btrfs_block_group_item
, flags
, 64);
877 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
878 struct btrfs_block_group_item
, flags
, 64);
880 /* struct btrfs_inode_ref */
881 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
883 /* struct btrfs_inode_item */
884 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
885 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
886 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
887 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
888 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
889 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
890 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
891 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
892 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
893 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
894 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
897 static inline struct btrfs_timespec
*
898 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
900 unsigned long ptr
= (unsigned long)inode_item
;
901 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
902 return (struct btrfs_timespec
*)ptr
;
905 static inline struct btrfs_timespec
*
906 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
908 unsigned long ptr
= (unsigned long)inode_item
;
909 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
910 return (struct btrfs_timespec
*)ptr
;
913 static inline struct btrfs_timespec
*
914 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
916 unsigned long ptr
= (unsigned long)inode_item
;
917 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
918 return (struct btrfs_timespec
*)ptr
;
921 static inline struct btrfs_timespec
*
922 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
924 unsigned long ptr
= (unsigned long)inode_item
;
925 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
926 return (struct btrfs_timespec
*)ptr
;
929 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
930 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
932 /* struct btrfs_extent_item */
933 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
935 /* struct btrfs_dev_extent */
936 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
938 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
940 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
942 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
944 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
946 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
947 return (u8
*)((unsigned long)dev
+ ptr
);
950 /* struct btrfs_extent_ref */
951 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
952 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
953 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
954 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
956 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
957 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
959 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
961 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
963 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
966 /* struct btrfs_node */
967 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
968 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
970 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
973 ptr
= offsetof(struct btrfs_node
, ptrs
) +
974 sizeof(struct btrfs_key_ptr
) * nr
;
975 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
978 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
982 ptr
= offsetof(struct btrfs_node
, ptrs
) +
983 sizeof(struct btrfs_key_ptr
) * nr
;
984 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
987 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
990 ptr
= offsetof(struct btrfs_node
, ptrs
) +
991 sizeof(struct btrfs_key_ptr
) * nr
;
992 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
995 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
999 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1000 sizeof(struct btrfs_key_ptr
) * nr
;
1001 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1004 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1006 return offsetof(struct btrfs_node
, ptrs
) +
1007 sizeof(struct btrfs_key_ptr
) * nr
;
1010 void btrfs_node_key(struct extent_buffer
*eb
,
1011 struct btrfs_disk_key
*disk_key
, int nr
);
1013 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1014 struct btrfs_disk_key
*disk_key
, int nr
)
1017 ptr
= btrfs_node_key_ptr_offset(nr
);
1018 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1019 struct btrfs_key_ptr
, key
, disk_key
);
1022 /* struct btrfs_item */
1023 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1024 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1026 static inline unsigned long btrfs_item_nr_offset(int nr
)
1028 return offsetof(struct btrfs_leaf
, items
) +
1029 sizeof(struct btrfs_item
) * nr
;
1032 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1035 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1038 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1039 struct btrfs_item
*item
)
1041 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1044 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1046 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1049 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1051 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1054 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1056 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1059 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1060 struct btrfs_disk_key
*disk_key
, int nr
)
1062 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1063 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1066 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1067 struct btrfs_disk_key
*disk_key
, int nr
)
1069 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1070 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1073 /* struct btrfs_dir_item */
1074 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1075 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1076 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1078 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1079 struct btrfs_dir_item
*item
,
1080 struct btrfs_disk_key
*key
)
1082 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1085 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1086 struct btrfs_dir_item
*item
,
1087 struct btrfs_disk_key
*key
)
1089 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1092 /* struct btrfs_disk_key */
1093 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1095 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1096 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1098 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1099 struct btrfs_disk_key
*disk
)
1101 cpu
->offset
= le64_to_cpu(disk
->offset
);
1102 cpu
->type
= disk
->type
;
1103 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1106 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1107 struct btrfs_key
*cpu
)
1109 disk
->offset
= cpu_to_le64(cpu
->offset
);
1110 disk
->type
= cpu
->type
;
1111 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1114 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1115 struct btrfs_key
*key
, int nr
)
1117 struct btrfs_disk_key disk_key
;
1118 btrfs_node_key(eb
, &disk_key
, nr
);
1119 btrfs_disk_key_to_cpu(key
, &disk_key
);
1122 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1123 struct btrfs_key
*key
, int nr
)
1125 struct btrfs_disk_key disk_key
;
1126 btrfs_item_key(eb
, &disk_key
, nr
);
1127 btrfs_disk_key_to_cpu(key
, &disk_key
);
1130 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1131 struct btrfs_dir_item
*item
,
1132 struct btrfs_key
*key
)
1134 struct btrfs_disk_key disk_key
;
1135 btrfs_dir_item_key(eb
, item
, &disk_key
);
1136 btrfs_disk_key_to_cpu(key
, &disk_key
);
1140 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1145 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1150 /* struct btrfs_header */
1151 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1152 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1154 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1155 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1156 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1157 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1159 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1161 return (btrfs_header_flags(eb
) & flag
) == flag
;
1164 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1166 u64 flags
= btrfs_header_flags(eb
);
1167 btrfs_set_header_flags(eb
, flags
| flag
);
1168 return (flags
& flag
) == flag
;
1171 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1173 u64 flags
= btrfs_header_flags(eb
);
1174 btrfs_set_header_flags(eb
, flags
& ~flag
);
1175 return (flags
& flag
) == flag
;
1178 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1180 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1184 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1186 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1190 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1192 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1196 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1198 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1202 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1207 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1212 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1217 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1219 return (btrfs_header_level(eb
) == 0);
1222 /* struct btrfs_root_item */
1223 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1224 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1225 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1227 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1228 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1229 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1230 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1231 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1232 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1233 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1235 /* struct btrfs_super_block */
1236 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1237 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1238 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1240 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1241 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1242 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1243 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1245 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1247 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1248 chunk_root_level
, 64);
1249 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1251 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1253 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1255 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1257 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1259 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1261 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1262 root_dir_objectid
, 64);
1263 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1266 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1268 return offsetof(struct btrfs_leaf
, items
);
1271 /* struct btrfs_file_extent_item */
1272 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1274 static inline unsigned long btrfs_file_extent_inline_start(struct
1275 btrfs_file_extent_item
*e
)
1277 unsigned long offset
= (unsigned long)e
;
1278 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1282 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1284 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1287 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1288 struct btrfs_item
*e
)
1290 unsigned long offset
;
1291 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1292 return btrfs_item_size(eb
, e
) - offset
;
1295 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1297 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1299 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1300 disk_num_bytes
, 64);
1301 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1303 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1306 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1308 return sb
->s_fs_info
;
1311 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1312 const char *name
, int len
)
1314 /* if we already have a name just free it */
1318 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1322 memcpy(root
->name
, name
, len
);
1323 root
->name
[len
] ='\0';
1328 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1330 return root
->leafsize
;
1331 return root
->nodesize
;
1334 /* helper function to cast into the data area of the leaf. */
1335 #define btrfs_item_ptr(leaf, slot, type) \
1336 ((type *)(btrfs_leaf_data(leaf) + \
1337 btrfs_item_offset_nr(leaf, slot)))
1339 #define btrfs_item_ptr_offset(leaf, slot) \
1340 ((unsigned long)(btrfs_leaf_data(leaf) + \
1341 btrfs_item_offset_nr(leaf, slot)))
1343 static inline struct dentry
*fdentry(struct file
*file
) {
1344 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1345 return file
->f_dentry
;
1347 return file
->f_path
.dentry
;
1352 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1353 struct btrfs_path
*count_path
,
1354 u64 expected_owner
, u64 first_extent
);
1355 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1356 struct btrfs_root
*root
);
1357 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1358 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1359 btrfs_fs_info
*info
,
1361 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1362 struct btrfs_block_group_cache
1363 *hint
, u64 search_start
,
1364 int data
, int owner
);
1365 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1366 struct btrfs_root
*root
,
1374 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1375 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1376 struct btrfs_root
*root
,
1377 struct btrfs_path
*path
, u64 bytenr
,
1378 u64 root_objectid
, u64 ref_generation
,
1379 u64 owner
, u64 owner_offset
);
1380 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1381 struct btrfs_root
*root
,
1382 u64 num_bytes
, u64 min_bytes
,
1383 u64 root_objectid
, u64 ref_generation
,
1384 u64 owner
, u64 owner_offset
,
1385 u64 empty_size
, u64 hint_byte
,
1386 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1387 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1388 struct extent_buffer
*buf
);
1389 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1390 *root
, u64 bytenr
, u64 num_bytes
,
1391 u64 root_objectid
, u64 ref_generation
,
1392 u64 owner_objectid
, u64 owner_offset
, int pin
);
1393 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1394 struct btrfs_root
*root
,
1395 struct extent_io_tree
*unpin
);
1396 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1397 struct btrfs_root
*root
,
1398 u64 bytenr
, u64 num_bytes
,
1399 u64 root_objectid
, u64 ref_generation
,
1400 u64 owner
, u64 owner_offset
);
1401 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1402 struct btrfs_root
*root
);
1403 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1404 int btrfs_read_block_groups(struct btrfs_root
*root
);
1405 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1406 struct btrfs_root
*root
, u64 bytes_used
,
1407 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1410 int btrfs_previous_item(struct btrfs_root
*root
,
1411 struct btrfs_path
*path
, u64 min_objectid
,
1414 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1415 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1416 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1417 struct btrfs_key
*key
, int lowest_level
,
1418 int cache_only
, u64 min_trans
);
1419 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1420 struct btrfs_path
*path
, int cache_only
,
1423 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1424 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1425 struct extent_buffer
*parent
, int parent_slot
,
1426 struct extent_buffer
**cow_ret
);
1427 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1428 struct btrfs_root
*root
,
1429 struct extent_buffer
*buf
,
1430 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1431 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1432 *root
, struct btrfs_path
*path
, u32 data_size
);
1433 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1434 struct btrfs_root
*root
,
1435 struct btrfs_path
*path
,
1436 u32 new_size
, int from_end
);
1437 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1438 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1440 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1441 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1442 int start_slot
, int cache_only
, u64
*last_ret
,
1443 struct btrfs_key
*progress
);
1444 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1445 struct btrfs_path
*btrfs_alloc_path(void);
1446 void btrfs_free_path(struct btrfs_path
*p
);
1447 void btrfs_init_path(struct btrfs_path
*p
);
1448 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1449 struct btrfs_path
*path
, int slot
, int nr
);
1451 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1452 struct btrfs_root
*root
,
1453 struct btrfs_path
*path
)
1455 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1458 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1459 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1460 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1461 struct btrfs_root
*root
,
1462 struct btrfs_path
*path
,
1463 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1465 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1466 struct btrfs_root
*root
,
1467 struct btrfs_path
*path
,
1468 struct btrfs_key
*key
,
1471 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1474 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1475 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1476 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1477 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1480 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1481 struct btrfs_key
*key
);
1482 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1483 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1485 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1486 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1488 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1489 btrfs_root_item
*item
, struct btrfs_key
*key
);
1490 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1491 u64
*found_objectid
);
1492 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1493 struct btrfs_root
*latest_root
);
1495 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1496 *root
, const char *name
, int name_len
, u64 dir
,
1497 struct btrfs_key
*location
, u8 type
);
1498 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1499 struct btrfs_root
*root
,
1500 struct btrfs_path
*path
, u64 dir
,
1501 const char *name
, int name_len
,
1503 struct btrfs_dir_item
*
1504 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1505 struct btrfs_root
*root
,
1506 struct btrfs_path
*path
, u64 dir
,
1507 u64 objectid
, const char *name
, int name_len
,
1509 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1510 struct btrfs_path
*path
,
1511 const char *name
, int name_len
);
1512 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1513 struct btrfs_root
*root
,
1514 struct btrfs_path
*path
,
1515 struct btrfs_dir_item
*di
);
1516 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1517 struct btrfs_root
*root
, const char *name
,
1518 u16 name_len
, const void *data
, u16 data_len
,
1520 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1521 struct btrfs_root
*root
,
1522 struct btrfs_path
*path
, u64 dir
,
1523 const char *name
, u16 name_len
,
1526 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1527 struct btrfs_root
*fs_root
,
1528 u64 dirid
, u64
*objectid
);
1529 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1532 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1533 struct btrfs_root
*root
,
1534 const char *name
, int name_len
,
1535 u64 inode_objectid
, u64 ref_objectid
);
1536 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1537 struct btrfs_root
*root
,
1538 const char *name
, int name_len
,
1539 u64 inode_objectid
, u64 ref_objectid
);
1540 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1541 struct btrfs_root
*root
,
1542 struct btrfs_path
*path
, u64 objectid
);
1543 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1544 *root
, struct btrfs_path
*path
,
1545 struct btrfs_key
*location
, int mod
);
1548 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1549 struct btrfs_root
*root
,
1550 u64 objectid
, u64 pos
, u64 disk_offset
,
1552 u64 num_bytes
, u64 offset
);
1553 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1554 struct btrfs_root
*root
,
1555 struct btrfs_path
*path
, u64 objectid
,
1556 u64 bytenr
, int mod
);
1557 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1558 struct btrfs_root
*root
, struct inode
*inode
,
1559 struct bio
*bio
, char *sums
);
1560 int btrfs_csum_one_bio(struct btrfs_root
*root
,
1561 struct bio
*bio
, char **sums_ret
);
1562 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1563 struct btrfs_root
*root
,
1564 struct btrfs_path
*path
,
1565 u64 objectid
, u64 offset
,
1567 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1568 struct btrfs_root
*root
, struct btrfs_path
*path
,
1571 int btrfs_create_subvol_root(struct btrfs_root
*new_root
,
1572 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1573 struct btrfs_block_group_cache
*block_group
);
1575 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1578 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1579 size_t size
, struct bio
*bio
);
1581 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1584 if (dec
<= inode
->i_blocks
)
1585 inode
->i_blocks
-= dec
;
1587 inode
->i_blocks
= 0;
1590 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1591 struct file_ra_state
*ra
, struct file
*file
,
1592 pgoff_t offset
, pgoff_t last_index
);
1593 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1595 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1596 int btrfs_readpage(struct file
*file
, struct page
*page
);
1597 void btrfs_delete_inode(struct inode
*inode
);
1598 void btrfs_put_inode(struct inode
*inode
);
1599 void btrfs_read_locked_inode(struct inode
*inode
);
1600 int btrfs_write_inode(struct inode
*inode
, int wait
);
1601 void btrfs_dirty_inode(struct inode
*inode
);
1602 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1603 void btrfs_destroy_inode(struct inode
*inode
);
1604 int btrfs_init_cachep(void);
1605 void btrfs_destroy_cachep(void);
1606 long btrfs_ioctl_trans_end(struct file
*file
);
1607 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1608 struct btrfs_root
*root
);
1609 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1611 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1612 unsigned from
, unsigned to
);
1613 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1614 size_t page_offset
, u64 start
, u64 end
,
1616 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1617 struct btrfs_root
*root
,
1618 struct inode
*inode
);
1621 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1624 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1625 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1626 extern struct file_operations btrfs_file_operations
;
1627 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
, struct inode
*inode
,
1629 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1630 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1633 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1634 struct btrfs_root
*root
, int cache_only
);
1637 int btrfs_init_sysfs(void);
1638 void btrfs_exit_sysfs(void);
1639 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1640 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1641 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1642 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1645 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1646 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1647 struct btrfs_root
*root
, struct inode
*inode
);
1649 u64
btrfs_parse_size(char *str
);
1650 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1651 int btrfs_sync_fs(struct super_block
*sb
, int wait
);