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/workqueue.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.h>
29 #include <asm/kmap_types.h>
30 #include "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.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
76 * the device items go into the chunk tree. The key is in the form
77 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
79 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
82 * we can actually store much bigger names, but lets not confuse the rest
85 #define BTRFS_NAME_LEN 255
87 /* 32 bytes in various csum fields */
88 #define BTRFS_CSUM_SIZE 32
89 /* four bytes for CRC32 */
90 #define BTRFS_CRC32_SIZE 4
91 #define BTRFS_EMPTY_DIR_SIZE 0
93 #define BTRFS_FT_UNKNOWN 0
94 #define BTRFS_FT_REG_FILE 1
95 #define BTRFS_FT_DIR 2
96 #define BTRFS_FT_CHRDEV 3
97 #define BTRFS_FT_BLKDEV 4
98 #define BTRFS_FT_FIFO 5
99 #define BTRFS_FT_SOCK 6
100 #define BTRFS_FT_SYMLINK 7
101 #define BTRFS_FT_XATTR 8
102 #define BTRFS_FT_MAX 9
105 * the key defines the order in the tree, and so it also defines (optimal)
106 * block layout. objectid corresonds to the inode number. The flags
107 * tells us things about the object, and is a kind of stream selector.
108 * so for a given inode, keys with flags of 1 might refer to the inode
109 * data, flags of 2 may point to file data in the btree and flags == 3
110 * may point to extents.
112 * offset is the starting byte offset for this key in the stream.
114 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
115 * in cpu native order. Otherwise they are identical and their sizes
116 * should be the same (ie both packed)
118 struct btrfs_disk_key
{
122 } __attribute__ ((__packed__
));
128 } __attribute__ ((__packed__
));
130 struct btrfs_mapping_tree
{
131 struct extent_map_tree map_tree
;
134 #define BTRFS_DEV_UUID_SIZE 16
135 struct btrfs_dev_item
{
136 /* the internal btrfs device id */
139 /* size of the device */
145 /* optimal io alignment for this device */
148 /* optimal io width for this device */
151 /* minimal io size for this device */
154 /* type and info about this device */
157 /* btrfs generated uuid for this device */
158 u8 uuid
[BTRFS_DEV_UUID_SIZE
];
159 } __attribute__ ((__packed__
));
161 struct btrfs_stripe
{
164 } __attribute__ ((__packed__
));
171 /* optimal io alignment for this chunk */
174 /* optimal io width for this chunk */
177 /* minimal io size for this chunk */
180 /* 2^16 stripes is quite a lot, a second limit is the size of a single
184 struct btrfs_stripe stripe
;
185 /* additional stripes go here */
186 } __attribute__ ((__packed__
));
188 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
190 BUG_ON(num_stripes
== 0);
191 return sizeof(struct btrfs_chunk
) +
192 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
195 #define BTRFS_FSID_SIZE 16
196 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
199 * every tree block (leaf or node) starts with this header.
201 struct btrfs_header
{
202 u8 csum
[BTRFS_CSUM_SIZE
];
203 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
204 __le64 bytenr
; /* which block this node is supposed to live in */
210 } __attribute__ ((__packed__
));
212 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
213 sizeof(struct btrfs_header)) / \
214 sizeof(struct btrfs_key_ptr))
215 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
216 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
217 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
218 sizeof(struct btrfs_item) - \
219 sizeof(struct btrfs_file_extent_item))
223 * this is a very generous portion of the super block, giving us
224 * room to translate 14 chunks with 3 stripes each.
226 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
229 * the super block basically lists the main trees of the FS
230 * it currently lacks any block count etc etc
232 struct btrfs_super_block
{
233 u8 csum
[BTRFS_CSUM_SIZE
];
234 /* the first 4 fields must match struct btrfs_header */
235 u8 fsid
[16]; /* FS specific uuid */
236 __le64 bytenr
; /* this block number */
244 __le64 root_dir_objectid
;
250 __le32 sys_chunk_array_size
;
253 struct btrfs_dev_item dev_item
;
254 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
255 } __attribute__ ((__packed__
));
258 * A leaf is full of items. offset and size tell us where to find
259 * the item in the leaf (relative to the start of the data area)
262 struct btrfs_disk_key key
;
265 } __attribute__ ((__packed__
));
268 * leaves have an item area and a data area:
269 * [item0, item1....itemN] [free space] [dataN...data1, data0]
271 * The data is separate from the items to get the keys closer together
275 struct btrfs_header header
;
276 struct btrfs_item items
[];
277 } __attribute__ ((__packed__
));
280 * all non-leaf blocks are nodes, they hold only keys and pointers to
283 struct btrfs_key_ptr
{
284 struct btrfs_disk_key key
;
287 } __attribute__ ((__packed__
));
290 struct btrfs_header header
;
291 struct btrfs_key_ptr ptrs
[];
292 } __attribute__ ((__packed__
));
295 * btrfs_paths remember the path taken from the root down to the leaf.
296 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
297 * to any other levels that are present.
299 * The slots array records the index of the item or block pointer
300 * used while walking the tree.
303 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
304 int slots
[BTRFS_MAX_LEVEL
];
310 * items in the extent btree are used to record the objectid of the
311 * owner of the block and the number of references
313 struct btrfs_extent_item
{
315 } __attribute__ ((__packed__
));
317 struct btrfs_extent_ref
{
322 } __attribute__ ((__packed__
));
324 /* dev extents record free space on individual devices. The owner
325 * field points back to the chunk allocation mapping tree that allocated
328 struct btrfs_dev_extent
{
331 } __attribute__ ((__packed__
));
334 struct btrfs_inode_ref
{
337 } __attribute__ ((__packed__
));
339 struct btrfs_timespec
{
342 } __attribute__ ((__packed__
));
345 * there is no padding here on purpose. If you want to extent the inode,
346 * make a new item type
348 struct btrfs_inode_item
{
360 struct btrfs_timespec atime
;
361 struct btrfs_timespec ctime
;
362 struct btrfs_timespec mtime
;
363 struct btrfs_timespec otime
;
364 } __attribute__ ((__packed__
));
366 struct btrfs_dir_item
{
367 struct btrfs_disk_key location
;
371 } __attribute__ ((__packed__
));
373 struct btrfs_root_item
{
374 struct btrfs_inode_item inode
;
381 struct btrfs_disk_key drop_progress
;
384 } __attribute__ ((__packed__
));
386 #define BTRFS_FILE_EXTENT_REG 0
387 #define BTRFS_FILE_EXTENT_INLINE 1
389 struct btrfs_file_extent_item
{
393 * disk space consumed by the extent, checksum blocks are included
397 __le64 disk_num_bytes
;
399 * the logical offset in file blocks (no csums)
400 * this extent record is for. This allows a file extent to point
401 * into the middle of an existing extent on disk, sharing it
402 * between two snapshots (useful if some bytes in the middle of the
403 * extent have changed
407 * the logical number of file blocks (no csums included)
410 } __attribute__ ((__packed__
));
412 struct btrfs_csum_item
{
414 } __attribute__ ((__packed__
));
416 /* different types of block groups (and chunks) */
417 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
418 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
419 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
420 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
421 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
422 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
425 struct btrfs_block_group_item
{
428 __le64 chunk_objectid
;
430 } __attribute__ ((__packed__
));
432 struct btrfs_space_info
{
438 struct list_head list
;
441 struct btrfs_block_group_cache
{
442 struct btrfs_key key
;
443 struct btrfs_block_group_item item
;
444 struct btrfs_space_info
*space_info
;
451 struct btrfs_fs_devices
;
452 struct btrfs_fs_info
{
453 u8 fsid
[BTRFS_FSID_SIZE
];
454 struct btrfs_root
*extent_root
;
455 struct btrfs_root
*tree_root
;
456 struct btrfs_root
*chunk_root
;
457 struct btrfs_root
*dev_root
;
458 struct radix_tree_root fs_roots_radix
;
460 struct extent_io_tree free_space_cache
;
461 struct extent_io_tree block_group_cache
;
462 struct extent_io_tree pinned_extents
;
463 struct extent_io_tree pending_del
;
464 struct extent_io_tree extent_ins
;
466 /* logical->physical extent mapping */
467 struct btrfs_mapping_tree mapping_tree
;
470 u64 last_trans_committed
;
471 unsigned long mount_opt
;
475 struct btrfs_transaction
*running_transaction
;
476 struct btrfs_super_block super_copy
;
477 struct extent_buffer
*sb_buffer
;
478 struct block_device
*__bdev
;
479 struct super_block
*sb
;
480 struct inode
*btree_inode
;
481 struct backing_dev_info bdi
;
482 spinlock_t hash_lock
;
483 struct mutex trans_mutex
;
484 struct mutex fs_mutex
;
485 struct list_head trans_list
;
486 struct list_head hashers
;
487 struct list_head dead_roots
;
488 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
489 struct work_struct trans_work
;
491 struct delayed_work trans_work
;
493 struct kobject super_kobj
;
494 struct completion kobj_unregister
;
497 unsigned long throttles
;
500 struct list_head dirty_cowonly_roots
;
502 struct btrfs_fs_devices
*fs_devices
;
503 struct list_head space_info
;
504 spinlock_t delalloc_lock
;
505 spinlock_t new_trans_lock
;
509 int avail_data_alloc_bits
;
510 int avail_metadata_alloc_bits
;
511 int avail_system_alloc_bits
;
512 int data_alloc_profile
;
513 int metadata_alloc_profile
;
514 int system_alloc_profile
;
518 * in ram representation of the tree. extent_root is used for all allocations
519 * and for the extent tree extent_root root.
522 struct extent_buffer
*node
;
523 struct extent_buffer
*commit_root
;
524 struct btrfs_root_item root_item
;
525 struct btrfs_key root_key
;
526 struct btrfs_fs_info
*fs_info
;
528 struct kobject root_kobj
;
529 struct completion kobj_unregister
;
533 /* data allocations are done in sectorsize units */
536 /* node allocations are done in nodesize units */
539 /* leaf allocations are done in leafsize units */
546 u64 last_inode_alloc
;
549 struct btrfs_key defrag_progress
;
555 /* the dirty list is only used by non-reference counted roots */
556 struct list_head dirty_list
;
561 * inode items have the data typically returned from stat and store other
562 * info about object characteristics. There is one for every file and dir in
565 #define BTRFS_INODE_ITEM_KEY 1
566 #define BTRFS_INODE_REF_KEY 2
567 #define BTRFS_XATTR_ITEM_KEY 8
568 /* reserve 2-15 close to the inode for later flexibility */
571 * dir items are the name -> inode pointers in a directory. There is one
572 * for every name in a directory.
574 #define BTRFS_DIR_ITEM_KEY 16
575 #define BTRFS_DIR_INDEX_KEY 17
577 * extent data is for file data
579 #define BTRFS_EXTENT_DATA_KEY 18
581 * csum items have the checksums for data in the extents
583 #define BTRFS_CSUM_ITEM_KEY 19
585 /* reserve 20-31 for other file stuff */
588 * root items point to tree roots. There are typically in the root
589 * tree used by the super block to find all the other trees
591 #define BTRFS_ROOT_ITEM_KEY 32
593 * extent items are in the extent map tree. These record which blocks
594 * are used, and how many references there are to each block
596 #define BTRFS_EXTENT_ITEM_KEY 33
597 #define BTRFS_EXTENT_REF_KEY 34
600 * block groups give us hints into the extent allocation trees. Which
601 * blocks are free etc etc
603 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
605 #define BTRFS_DEV_EXTENT_KEY 75
606 #define BTRFS_DEV_ITEM_KEY 76
607 #define BTRFS_CHUNK_ITEM_KEY 77
610 * string items are for debugging. They just store a short string of
613 #define BTRFS_STRING_ITEM_KEY 253
615 #define BTRFS_MOUNT_NODATASUM (1 << 0)
616 #define BTRFS_MOUNT_NODATACOW (1 << 1)
617 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
618 #define BTRFS_MOUNT_SSD (1 << 3)
620 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
621 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
622 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
627 #define BTRFS_INODE_NODATASUM (1 << 0)
628 #define BTRFS_INODE_NODATACOW (1 << 1)
629 #define BTRFS_INODE_READONLY (1 << 2)
630 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
632 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
634 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
636 /* some macros to generate set/get funcs for the struct fields. This
637 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
640 #define le8_to_cpu(v) (v)
641 #define cpu_to_le8(v) (v)
644 #define read_eb_member(eb, ptr, type, member, result) ( \
645 read_extent_buffer(eb, (char *)(result), \
646 ((unsigned long)(ptr)) + \
647 offsetof(type, member), \
648 sizeof(((type *)0)->member)))
650 #define write_eb_member(eb, ptr, type, member, result) ( \
651 write_extent_buffer(eb, (char *)(result), \
652 ((unsigned long)(ptr)) + \
653 offsetof(type, member), \
654 sizeof(((type *)0)->member)))
656 #ifndef BTRFS_SETGET_FUNCS
657 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
658 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
659 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
662 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
663 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
665 type *p = kmap_atomic(eb->first_page, KM_USER0); \
666 u##bits res = le##bits##_to_cpu(p->member); \
667 kunmap_atomic(p, KM_USER0); \
670 static inline void btrfs_set_##name(struct extent_buffer *eb, \
673 type *p = kmap_atomic(eb->first_page, KM_USER0); \
674 p->member = cpu_to_le##bits(val); \
675 kunmap_atomic(p, KM_USER0); \
678 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
679 static inline u##bits btrfs_##name(type *s) \
681 return le##bits##_to_cpu(s->member); \
683 static inline void btrfs_set_##name(type *s, u##bits val) \
685 s->member = cpu_to_le##bits(val); \
688 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
689 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
690 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
691 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
692 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
693 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
694 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
696 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
697 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
699 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
701 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
703 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
705 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
707 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
709 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
711 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
714 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
715 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
716 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
717 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
718 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
719 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
720 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
721 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
722 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
724 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
725 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
727 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
729 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
731 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
733 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
736 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
737 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
739 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
742 unsigned long offset
= (unsigned long)c
;
743 offset
+= offsetof(struct btrfs_chunk
, stripe
);
744 offset
+= nr
* sizeof(struct btrfs_stripe
);
745 return (struct btrfs_stripe
*)offset
;
748 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
749 struct btrfs_chunk
*c
, int nr
)
751 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
754 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
755 struct btrfs_chunk
*c
, int nr
,
758 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
761 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
762 struct btrfs_chunk
*c
, int nr
)
764 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
767 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
768 struct btrfs_chunk
*c
, int nr
,
771 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
774 /* struct btrfs_block_group_item */
775 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
777 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
779 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree
, struct btrfs_block_group_item
,
781 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree
, struct btrfs_block_group_item
,
783 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
784 struct btrfs_block_group_item
, chunk_objectid
, 64);
785 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd
,
786 struct btrfs_block_group_item
, chunk_objectid
, 64);
787 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
788 struct btrfs_block_group_item
, flags
, 64);
789 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
790 struct btrfs_block_group_item
, flags
, 64);
792 /* struct btrfs_inode_ref */
793 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
795 /* struct btrfs_inode_item */
796 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
797 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
798 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
799 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
800 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
801 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
802 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
803 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
804 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
805 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
806 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
809 static inline struct btrfs_timespec
*
810 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
812 unsigned long ptr
= (unsigned long)inode_item
;
813 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
814 return (struct btrfs_timespec
*)ptr
;
817 static inline struct btrfs_timespec
*
818 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
820 unsigned long ptr
= (unsigned long)inode_item
;
821 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
822 return (struct btrfs_timespec
*)ptr
;
825 static inline struct btrfs_timespec
*
826 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
828 unsigned long ptr
= (unsigned long)inode_item
;
829 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
830 return (struct btrfs_timespec
*)ptr
;
833 static inline struct btrfs_timespec
*
834 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
836 unsigned long ptr
= (unsigned long)inode_item
;
837 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
838 return (struct btrfs_timespec
*)ptr
;
841 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
842 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
844 /* struct btrfs_extent_item */
845 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
847 /* struct btrfs_dev_extent */
848 BTRFS_SETGET_FUNCS(dev_extent_owner
, struct btrfs_dev_extent
, owner
, 64);
849 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
851 /* struct btrfs_extent_ref */
852 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
853 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
854 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
855 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
857 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
858 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
860 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
862 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
864 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
867 /* struct btrfs_node */
868 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
869 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
871 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
874 ptr
= offsetof(struct btrfs_node
, ptrs
) +
875 sizeof(struct btrfs_key_ptr
) * nr
;
876 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
879 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
883 ptr
= offsetof(struct btrfs_node
, ptrs
) +
884 sizeof(struct btrfs_key_ptr
) * nr
;
885 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
888 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
891 ptr
= offsetof(struct btrfs_node
, ptrs
) +
892 sizeof(struct btrfs_key_ptr
) * nr
;
893 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
896 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
900 ptr
= offsetof(struct btrfs_node
, ptrs
) +
901 sizeof(struct btrfs_key_ptr
) * nr
;
902 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
905 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
907 return offsetof(struct btrfs_node
, ptrs
) +
908 sizeof(struct btrfs_key_ptr
) * nr
;
911 void btrfs_node_key(struct extent_buffer
*eb
,
912 struct btrfs_disk_key
*disk_key
, int nr
);
914 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
915 struct btrfs_disk_key
*disk_key
, int nr
)
918 ptr
= btrfs_node_key_ptr_offset(nr
);
919 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
920 struct btrfs_key_ptr
, key
, disk_key
);
923 /* struct btrfs_item */
924 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
925 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
927 static inline unsigned long btrfs_item_nr_offset(int nr
)
929 return offsetof(struct btrfs_leaf
, items
) +
930 sizeof(struct btrfs_item
) * nr
;
933 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
936 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
939 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
940 struct btrfs_item
*item
)
942 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
945 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
947 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
950 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
952 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
955 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
957 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
960 static inline void btrfs_item_key(struct extent_buffer
*eb
,
961 struct btrfs_disk_key
*disk_key
, int nr
)
963 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
964 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
967 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
968 struct btrfs_disk_key
*disk_key
, int nr
)
970 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
971 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
974 /* struct btrfs_dir_item */
975 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
976 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
977 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
979 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
980 struct btrfs_dir_item
*item
,
981 struct btrfs_disk_key
*key
)
983 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
986 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
987 struct btrfs_dir_item
*item
,
988 struct btrfs_disk_key
*key
)
990 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
993 /* struct btrfs_disk_key */
994 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
996 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
997 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
999 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1000 struct btrfs_disk_key
*disk
)
1002 cpu
->offset
= le64_to_cpu(disk
->offset
);
1003 cpu
->type
= disk
->type
;
1004 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1007 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1008 struct btrfs_key
*cpu
)
1010 disk
->offset
= cpu_to_le64(cpu
->offset
);
1011 disk
->type
= cpu
->type
;
1012 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1015 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1016 struct btrfs_key
*key
, int nr
)
1018 struct btrfs_disk_key disk_key
;
1019 btrfs_node_key(eb
, &disk_key
, nr
);
1020 btrfs_disk_key_to_cpu(key
, &disk_key
);
1023 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1024 struct btrfs_key
*key
, int nr
)
1026 struct btrfs_disk_key disk_key
;
1027 btrfs_item_key(eb
, &disk_key
, nr
);
1028 btrfs_disk_key_to_cpu(key
, &disk_key
);
1031 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1032 struct btrfs_dir_item
*item
,
1033 struct btrfs_key
*key
)
1035 struct btrfs_disk_key disk_key
;
1036 btrfs_dir_item_key(eb
, item
, &disk_key
);
1037 btrfs_disk_key_to_cpu(key
, &disk_key
);
1041 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1046 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1051 /* struct btrfs_header */
1052 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1053 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1055 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1056 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1057 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1058 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1060 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1062 return (btrfs_header_flags(eb
) & flag
) == flag
;
1065 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1067 u64 flags
= btrfs_header_flags(eb
);
1068 btrfs_set_header_flags(eb
, flags
| flag
);
1069 return (flags
& flag
) == flag
;
1072 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1074 u64 flags
= btrfs_header_flags(eb
);
1075 btrfs_set_header_flags(eb
, flags
& ~flag
);
1076 return (flags
& flag
) == flag
;
1079 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1081 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1085 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1087 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1091 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1093 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1097 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1102 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1107 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1112 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1114 return (btrfs_header_level(eb
) == 0);
1117 /* struct btrfs_root_item */
1118 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1119 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1120 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1122 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1123 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1124 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1125 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1126 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1127 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1128 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1130 /* struct btrfs_super_block */
1131 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1132 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1134 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1135 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1136 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1137 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1139 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1141 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1142 chunk_root_level
, 64);
1143 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1145 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1147 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1149 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1151 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1153 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1155 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1156 root_dir_objectid
, 64);
1157 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1160 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1162 return offsetof(struct btrfs_leaf
, items
);
1165 /* struct btrfs_file_extent_item */
1166 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1168 static inline unsigned long btrfs_file_extent_inline_start(struct
1169 btrfs_file_extent_item
*e
)
1171 unsigned long offset
= (unsigned long)e
;
1172 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1176 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1178 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1181 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1182 struct btrfs_item
*e
)
1184 unsigned long offset
;
1185 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1186 return btrfs_item_size(eb
, e
) - offset
;
1189 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1191 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1193 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1194 disk_num_bytes
, 64);
1195 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1197 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1200 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1202 return sb
->s_fs_info
;
1205 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1206 const char *name
, int len
)
1208 /* if we already have a name just free it */
1212 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1216 memcpy(root
->name
, name
, len
);
1217 root
->name
[len
] ='\0';
1222 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1224 return root
->leafsize
;
1225 return root
->nodesize
;
1228 /* helper function to cast into the data area of the leaf. */
1229 #define btrfs_item_ptr(leaf, slot, type) \
1230 ((type *)(btrfs_leaf_data(leaf) + \
1231 btrfs_item_offset_nr(leaf, slot)))
1233 #define btrfs_item_ptr_offset(leaf, slot) \
1234 ((unsigned long)(btrfs_leaf_data(leaf) + \
1235 btrfs_item_offset_nr(leaf, slot)))
1237 static inline struct dentry
*fdentry(struct file
*file
) {
1238 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1239 return file
->f_dentry
;
1241 return file
->f_path
.dentry
;
1246 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1247 struct btrfs_path
*count_path
,
1249 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1250 struct btrfs_root
*root
);
1251 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1252 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1253 btrfs_fs_info
*info
,
1255 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1256 struct btrfs_block_group_cache
1257 *hint
, u64 search_start
,
1258 int data
, int owner
);
1259 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1260 struct btrfs_root
*root
, u64 owner_objectid
);
1261 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1262 struct btrfs_root
*root
, u32 size
,
1264 u64 hint
, u64 empty_size
);
1265 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1266 struct btrfs_root
*root
,
1274 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1275 struct btrfs_root
*root
, u64 new_size
);
1276 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1277 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1278 struct btrfs_root
*root
,
1279 struct btrfs_path
*path
, u64 bytenr
,
1280 u64 root_objectid
, u64 ref_generation
,
1281 u64 owner
, u64 owner_offset
);
1282 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1283 struct btrfs_root
*root
,
1284 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1285 u64 owner
, u64 owner_offset
,
1286 u64 empty_size
, u64 hint_byte
,
1287 u64 search_end
, struct btrfs_key
*ins
, int data
);
1288 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1289 struct extent_buffer
*buf
);
1290 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1291 *root
, u64 bytenr
, u64 num_bytes
,
1292 u64 root_objectid
, u64 ref_generation
,
1293 u64 owner_objectid
, u64 owner_offset
, int pin
);
1294 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1295 struct btrfs_root
*root
,
1296 struct extent_io_tree
*unpin
);
1297 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1298 struct btrfs_root
*root
,
1299 u64 bytenr
, u64 num_bytes
,
1300 u64 root_objectid
, u64 ref_generation
,
1301 u64 owner
, u64 owner_offset
);
1302 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1303 struct btrfs_root
*root
);
1304 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1305 int btrfs_read_block_groups(struct btrfs_root
*root
);
1306 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1307 struct btrfs_root
*root
, u64 bytes_used
,
1308 u64 type
, u64 chunk_tree
, u64 chunk_objectid
,
1311 int btrfs_previous_item(struct btrfs_root
*root
,
1312 struct btrfs_path
*path
, u64 min_objectid
,
1314 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1315 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1316 struct extent_buffer
*parent
, int parent_slot
,
1317 struct extent_buffer
**cow_ret
);
1318 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1319 struct btrfs_root
*root
,
1320 struct extent_buffer
*buf
,
1321 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1322 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1323 *root
, struct btrfs_path
*path
, u32 data_size
);
1324 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1325 struct btrfs_root
*root
,
1326 struct btrfs_path
*path
,
1327 u32 new_size
, int from_end
);
1328 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1329 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1331 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1332 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1333 int start_slot
, int cache_only
, u64
*last_ret
,
1334 struct btrfs_key
*progress
);
1335 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1336 struct btrfs_path
*btrfs_alloc_path(void);
1337 void btrfs_free_path(struct btrfs_path
*p
);
1338 void btrfs_init_path(struct btrfs_path
*p
);
1339 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1340 struct btrfs_path
*path
, int slot
, int nr
);
1342 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1343 struct btrfs_root
*root
,
1344 struct btrfs_path
*path
)
1346 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1349 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1350 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1351 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1352 struct btrfs_root
*root
,
1353 struct btrfs_path
*path
,
1354 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1356 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1357 struct btrfs_root
*root
,
1358 struct btrfs_path
*path
,
1359 struct btrfs_key
*key
,
1362 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1365 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1366 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1367 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1368 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1371 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1372 struct btrfs_key
*key
);
1373 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1374 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1376 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1377 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1379 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1380 btrfs_root_item
*item
, struct btrfs_key
*key
);
1381 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1382 struct btrfs_root
*latest_root
);
1384 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1385 *root
, const char *name
, int name_len
, u64 dir
,
1386 struct btrfs_key
*location
, u8 type
);
1387 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1388 struct btrfs_root
*root
,
1389 struct btrfs_path
*path
, u64 dir
,
1390 const char *name
, int name_len
,
1392 struct btrfs_dir_item
*
1393 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1394 struct btrfs_root
*root
,
1395 struct btrfs_path
*path
, u64 dir
,
1396 u64 objectid
, const char *name
, int name_len
,
1398 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1399 struct btrfs_path
*path
,
1400 const char *name
, int name_len
);
1401 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1402 struct btrfs_root
*root
,
1403 struct btrfs_path
*path
,
1404 struct btrfs_dir_item
*di
);
1405 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1406 struct btrfs_root
*root
, const char *name
,
1407 u16 name_len
, const void *data
, u16 data_len
,
1409 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1410 struct btrfs_root
*root
,
1411 struct btrfs_path
*path
, u64 dir
,
1412 const char *name
, u16 name_len
,
1415 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1416 struct btrfs_root
*fs_root
,
1417 u64 dirid
, u64
*objectid
);
1418 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1421 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1422 struct btrfs_root
*root
,
1423 const char *name
, int name_len
,
1424 u64 inode_objectid
, u64 ref_objectid
);
1425 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1426 struct btrfs_root
*root
,
1427 const char *name
, int name_len
,
1428 u64 inode_objectid
, u64 ref_objectid
);
1429 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1430 struct btrfs_root
*root
,
1431 struct btrfs_path
*path
, u64 objectid
);
1432 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1433 *root
, struct btrfs_path
*path
,
1434 struct btrfs_key
*location
, int mod
);
1437 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1438 struct btrfs_root
*root
,
1439 u64 objectid
, u64 pos
, u64 offset
,
1442 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1443 struct btrfs_root
*root
,
1444 struct btrfs_path
*path
, u64 objectid
,
1445 u64 bytenr
, int mod
);
1446 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1447 struct btrfs_root
*root
, struct inode
*inode
,
1449 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1450 struct btrfs_root
*root
,
1451 struct btrfs_path
*path
,
1452 u64 objectid
, u64 offset
,
1454 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1455 struct btrfs_root
*root
, struct btrfs_path
*path
,
1458 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1459 size_t size
, struct bio
*bio
);
1461 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1464 if (dec
<= inode
->i_blocks
)
1465 inode
->i_blocks
-= dec
;
1467 inode
->i_blocks
= 0;
1470 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1471 struct file_ra_state
*ra
, struct file
*file
,
1472 pgoff_t offset
, pgoff_t last_index
);
1473 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1475 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1476 int btrfs_readpage(struct file
*file
, struct page
*page
);
1477 void btrfs_delete_inode(struct inode
*inode
);
1478 void btrfs_put_inode(struct inode
*inode
);
1479 void btrfs_read_locked_inode(struct inode
*inode
);
1480 int btrfs_write_inode(struct inode
*inode
, int wait
);
1481 void btrfs_dirty_inode(struct inode
*inode
);
1482 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1483 void btrfs_destroy_inode(struct inode
*inode
);
1484 int btrfs_init_cachep(void);
1485 void btrfs_destroy_cachep(void);
1486 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1487 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1488 struct btrfs_root
*root
);
1489 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1491 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1492 unsigned from
, unsigned to
);
1493 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1494 size_t page_offset
, u64 start
, u64 end
,
1496 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1497 struct btrfs_root
*root
,
1498 struct inode
*inode
);
1500 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1501 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1502 extern struct file_operations btrfs_file_operations
;
1503 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1504 struct btrfs_root
*root
, struct inode
*inode
,
1505 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1507 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1508 struct btrfs_root
*root
, int cache_only
);
1511 int btrfs_init_sysfs(void);
1512 void btrfs_exit_sysfs(void);
1513 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1514 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1515 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1516 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1519 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1520 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1521 struct btrfs_root
*root
, struct inode
*inode
);
1523 u64
btrfs_parse_size(char *str
);