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
197 * every tree block (leaf or node) starts with this header.
199 struct btrfs_header
{
200 u8 csum
[BTRFS_CSUM_SIZE
];
201 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
202 __le64 bytenr
; /* which block this node is supposed to live in */
208 } __attribute__ ((__packed__
));
210 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
211 sizeof(struct btrfs_header)) / \
212 sizeof(struct btrfs_key_ptr))
213 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
214 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
215 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
216 sizeof(struct btrfs_item) - \
217 sizeof(struct btrfs_file_extent_item))
221 * this is a very generous portion of the super block, giving us
222 * room to translate 14 chunks with 3 stripes each.
224 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
227 * the super block basically lists the main trees of the FS
228 * it currently lacks any block count etc etc
230 struct btrfs_super_block
{
231 u8 csum
[BTRFS_CSUM_SIZE
];
232 /* the first 3 fields must match struct btrfs_header */
233 u8 fsid
[16]; /* FS specific uuid */
234 __le64 bytenr
; /* this block number */
241 __le64 root_dir_objectid
;
247 __le32 sys_chunk_array_size
;
250 struct btrfs_dev_item dev_item
;
251 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
252 } __attribute__ ((__packed__
));
255 * A leaf is full of items. offset and size tell us where to find
256 * the item in the leaf (relative to the start of the data area)
259 struct btrfs_disk_key key
;
262 } __attribute__ ((__packed__
));
265 * leaves have an item area and a data area:
266 * [item0, item1....itemN] [free space] [dataN...data1, data0]
268 * The data is separate from the items to get the keys closer together
272 struct btrfs_header header
;
273 struct btrfs_item items
[];
274 } __attribute__ ((__packed__
));
277 * all non-leaf blocks are nodes, they hold only keys and pointers to
280 struct btrfs_key_ptr
{
281 struct btrfs_disk_key key
;
284 } __attribute__ ((__packed__
));
287 struct btrfs_header header
;
288 struct btrfs_key_ptr ptrs
[];
289 } __attribute__ ((__packed__
));
292 * btrfs_paths remember the path taken from the root down to the leaf.
293 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
294 * to any other levels that are present.
296 * The slots array records the index of the item or block pointer
297 * used while walking the tree.
300 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
301 int slots
[BTRFS_MAX_LEVEL
];
307 * items in the extent btree are used to record the objectid of the
308 * owner of the block and the number of references
310 struct btrfs_extent_item
{
312 } __attribute__ ((__packed__
));
314 struct btrfs_extent_ref
{
319 } __attribute__ ((__packed__
));
321 /* dev extents record free space on individual devices. The owner
322 * field points back to the chunk allocation mapping tree that allocated
325 struct btrfs_dev_extent
{
328 } __attribute__ ((__packed__
));
331 struct btrfs_inode_ref
{
334 } __attribute__ ((__packed__
));
336 struct btrfs_timespec
{
339 } __attribute__ ((__packed__
));
342 * there is no padding here on purpose. If you want to extent the inode,
343 * make a new item type
345 struct btrfs_inode_item
{
357 struct btrfs_timespec atime
;
358 struct btrfs_timespec ctime
;
359 struct btrfs_timespec mtime
;
360 struct btrfs_timespec otime
;
361 } __attribute__ ((__packed__
));
363 struct btrfs_dir_item
{
364 struct btrfs_disk_key location
;
368 } __attribute__ ((__packed__
));
370 struct btrfs_root_item
{
371 struct btrfs_inode_item inode
;
378 struct btrfs_disk_key drop_progress
;
381 } __attribute__ ((__packed__
));
383 #define BTRFS_FILE_EXTENT_REG 0
384 #define BTRFS_FILE_EXTENT_INLINE 1
386 struct btrfs_file_extent_item
{
390 * disk space consumed by the extent, checksum blocks are included
394 __le64 disk_num_bytes
;
396 * the logical offset in file blocks (no csums)
397 * this extent record is for. This allows a file extent to point
398 * into the middle of an existing extent on disk, sharing it
399 * between two snapshots (useful if some bytes in the middle of the
400 * extent have changed
404 * the logical number of file blocks (no csums included)
407 } __attribute__ ((__packed__
));
409 struct btrfs_csum_item
{
411 } __attribute__ ((__packed__
));
413 /* different types of block groups (and chunks) */
414 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
415 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
416 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
417 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
420 struct btrfs_block_group_item
{
423 __le64 chunk_objectid
;
425 } __attribute__ ((__packed__
));
427 struct btrfs_space_info
{
433 struct list_head list
;
436 struct btrfs_block_group_cache
{
437 struct btrfs_key key
;
438 struct btrfs_block_group_item item
;
439 struct btrfs_space_info
*space_info
;
446 struct btrfs_fs_devices
;
447 struct btrfs_fs_info
{
448 u8 fsid
[BTRFS_FSID_SIZE
];
449 struct btrfs_root
*extent_root
;
450 struct btrfs_root
*tree_root
;
451 struct btrfs_root
*chunk_root
;
452 struct btrfs_root
*dev_root
;
453 struct radix_tree_root fs_roots_radix
;
455 struct extent_io_tree free_space_cache
;
456 struct extent_io_tree block_group_cache
;
457 struct extent_io_tree pinned_extents
;
458 struct extent_io_tree pending_del
;
459 struct extent_io_tree extent_ins
;
461 /* logical->physical extent mapping */
462 struct btrfs_mapping_tree mapping_tree
;
465 u64 last_trans_committed
;
466 unsigned long mount_opt
;
470 struct btrfs_transaction
*running_transaction
;
471 struct btrfs_super_block super_copy
;
472 struct extent_buffer
*sb_buffer
;
473 struct block_device
*__bdev
;
474 struct super_block
*sb
;
475 struct inode
*btree_inode
;
476 struct backing_dev_info bdi
;
477 spinlock_t hash_lock
;
478 struct mutex trans_mutex
;
479 struct mutex fs_mutex
;
480 struct list_head trans_list
;
481 struct list_head hashers
;
482 struct list_head dead_roots
;
483 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
484 struct work_struct trans_work
;
486 struct delayed_work trans_work
;
488 struct kobject super_kobj
;
489 struct completion kobj_unregister
;
492 unsigned long throttles
;
495 struct list_head dirty_cowonly_roots
;
497 struct btrfs_fs_devices
*fs_devices
;
498 struct list_head space_info
;
499 spinlock_t delalloc_lock
;
500 spinlock_t new_trans_lock
;
504 int extra_data_alloc_bits
;
505 int extra_alloc_bits
;
509 * in ram representation of the tree. extent_root is used for all allocations
510 * and for the extent tree extent_root root.
513 struct extent_buffer
*node
;
514 struct extent_buffer
*commit_root
;
515 struct btrfs_root_item root_item
;
516 struct btrfs_key root_key
;
517 struct btrfs_fs_info
*fs_info
;
519 struct kobject root_kobj
;
520 struct completion kobj_unregister
;
524 /* data allocations are done in sectorsize units */
527 /* node allocations are done in nodesize units */
530 /* leaf allocations are done in leafsize units */
537 u64 last_inode_alloc
;
540 struct btrfs_key defrag_progress
;
546 /* the dirty list is only used by non-reference counted roots */
547 struct list_head dirty_list
;
552 * inode items have the data typically returned from stat and store other
553 * info about object characteristics. There is one for every file and dir in
556 #define BTRFS_INODE_ITEM_KEY 1
557 #define BTRFS_INODE_REF_KEY 2
558 #define BTRFS_XATTR_ITEM_KEY 8
559 /* reserve 2-15 close to the inode for later flexibility */
562 * dir items are the name -> inode pointers in a directory. There is one
563 * for every name in a directory.
565 #define BTRFS_DIR_ITEM_KEY 16
566 #define BTRFS_DIR_INDEX_KEY 17
568 * extent data is for file data
570 #define BTRFS_EXTENT_DATA_KEY 18
572 * csum items have the checksums for data in the extents
574 #define BTRFS_CSUM_ITEM_KEY 19
576 /* reserve 20-31 for other file stuff */
579 * root items point to tree roots. There are typically in the root
580 * tree used by the super block to find all the other trees
582 #define BTRFS_ROOT_ITEM_KEY 32
584 * extent items are in the extent map tree. These record which blocks
585 * are used, and how many references there are to each block
587 #define BTRFS_EXTENT_ITEM_KEY 33
588 #define BTRFS_EXTENT_REF_KEY 34
591 * block groups give us hints into the extent allocation trees. Which
592 * blocks are free etc etc
594 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
596 #define BTRFS_DEV_EXTENT_KEY 75
597 #define BTRFS_DEV_ITEM_KEY 76
598 #define BTRFS_CHUNK_ITEM_KEY 77
601 * string items are for debugging. They just store a short string of
604 #define BTRFS_STRING_ITEM_KEY 253
606 #define BTRFS_MOUNT_NODATASUM (1 << 0)
607 #define BTRFS_MOUNT_NODATACOW (1 << 1)
608 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
609 #define BTRFS_MOUNT_SSD (1 << 3)
611 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
612 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
613 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
618 #define BTRFS_INODE_NODATASUM (1 << 0)
619 #define BTRFS_INODE_NODATACOW (1 << 1)
620 #define BTRFS_INODE_READONLY (1 << 2)
621 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
623 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
625 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
627 /* some macros to generate set/get funcs for the struct fields. This
628 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
631 #define le8_to_cpu(v) (v)
632 #define cpu_to_le8(v) (v)
635 #define read_eb_member(eb, ptr, type, member, result) ( \
636 read_extent_buffer(eb, (char *)(result), \
637 ((unsigned long)(ptr)) + \
638 offsetof(type, member), \
639 sizeof(((type *)0)->member)))
641 #define write_eb_member(eb, ptr, type, member, result) ( \
642 write_extent_buffer(eb, (char *)(result), \
643 ((unsigned long)(ptr)) + \
644 offsetof(type, member), \
645 sizeof(((type *)0)->member)))
647 #ifndef BTRFS_SETGET_FUNCS
648 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
649 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
650 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
653 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
654 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
656 type *p = kmap_atomic(eb->first_page, KM_USER0); \
657 u##bits res = le##bits##_to_cpu(p->member); \
658 kunmap_atomic(p, KM_USER0); \
661 static inline void btrfs_set_##name(struct extent_buffer *eb, \
664 type *p = kmap_atomic(eb->first_page, KM_USER0); \
665 p->member = cpu_to_le##bits(val); \
666 kunmap_atomic(p, KM_USER0); \
669 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
670 static inline u##bits btrfs_##name(type *s) \
672 return le##bits##_to_cpu(s->member); \
674 static inline void btrfs_set_##name(type *s, u##bits val) \
676 s->member = cpu_to_le##bits(val); \
679 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
680 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
681 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
682 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
683 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
684 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
685 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
687 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
688 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
690 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
692 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
694 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
696 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
698 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
700 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
702 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
705 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
706 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
707 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
708 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
709 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
710 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
711 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
712 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
713 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
715 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
716 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
718 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
724 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
725 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
727 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
728 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
730 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
733 unsigned long offset
= (unsigned long)c
;
734 offset
+= offsetof(struct btrfs_chunk
, stripe
);
735 offset
+= nr
* sizeof(struct btrfs_stripe
);
736 return (struct btrfs_stripe
*)offset
;
739 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
740 struct btrfs_chunk
*c
, int nr
)
742 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
745 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
746 struct btrfs_chunk
*c
, int nr
,
749 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
752 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
753 struct btrfs_chunk
*c
, int nr
)
755 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
758 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
759 struct btrfs_chunk
*c
, int nr
,
762 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
765 /* struct btrfs_block_group_item */
766 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
768 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
770 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree
, struct btrfs_block_group_item
,
772 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree
, struct btrfs_block_group_item
,
774 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
775 struct btrfs_block_group_item
, chunk_objectid
, 64);
776 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd
,
777 struct btrfs_block_group_item
, chunk_objectid
, 64);
778 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
779 struct btrfs_block_group_item
, flags
, 64);
780 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
781 struct btrfs_block_group_item
, flags
, 64);
783 /* struct btrfs_inode_ref */
784 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
786 /* struct btrfs_inode_item */
787 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
788 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
789 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
790 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
791 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
792 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
793 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
794 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
795 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
796 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
797 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
800 static inline struct btrfs_timespec
*
801 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
803 unsigned long ptr
= (unsigned long)inode_item
;
804 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
805 return (struct btrfs_timespec
*)ptr
;
808 static inline struct btrfs_timespec
*
809 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
811 unsigned long ptr
= (unsigned long)inode_item
;
812 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
813 return (struct btrfs_timespec
*)ptr
;
816 static inline struct btrfs_timespec
*
817 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
819 unsigned long ptr
= (unsigned long)inode_item
;
820 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
821 return (struct btrfs_timespec
*)ptr
;
824 static inline struct btrfs_timespec
*
825 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
827 unsigned long ptr
= (unsigned long)inode_item
;
828 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
829 return (struct btrfs_timespec
*)ptr
;
832 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
833 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
835 /* struct btrfs_extent_item */
836 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
838 /* struct btrfs_dev_extent */
839 BTRFS_SETGET_FUNCS(dev_extent_owner
, struct btrfs_dev_extent
, owner
, 64);
840 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
842 /* struct btrfs_extent_ref */
843 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
844 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
845 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
846 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
848 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
849 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
851 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
853 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
855 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
858 /* struct btrfs_node */
859 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
860 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
862 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
865 ptr
= offsetof(struct btrfs_node
, ptrs
) +
866 sizeof(struct btrfs_key_ptr
) * nr
;
867 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
870 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
874 ptr
= offsetof(struct btrfs_node
, ptrs
) +
875 sizeof(struct btrfs_key_ptr
) * nr
;
876 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
879 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
882 ptr
= offsetof(struct btrfs_node
, ptrs
) +
883 sizeof(struct btrfs_key_ptr
) * nr
;
884 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
887 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
891 ptr
= offsetof(struct btrfs_node
, ptrs
) +
892 sizeof(struct btrfs_key_ptr
) * nr
;
893 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
896 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
898 return offsetof(struct btrfs_node
, ptrs
) +
899 sizeof(struct btrfs_key_ptr
) * nr
;
902 void btrfs_node_key(struct extent_buffer
*eb
,
903 struct btrfs_disk_key
*disk_key
, int nr
);
905 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
906 struct btrfs_disk_key
*disk_key
, int nr
)
909 ptr
= btrfs_node_key_ptr_offset(nr
);
910 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
911 struct btrfs_key_ptr
, key
, disk_key
);
914 /* struct btrfs_item */
915 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
916 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
918 static inline unsigned long btrfs_item_nr_offset(int nr
)
920 return offsetof(struct btrfs_leaf
, items
) +
921 sizeof(struct btrfs_item
) * nr
;
924 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
927 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
930 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
931 struct btrfs_item
*item
)
933 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
936 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
938 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
941 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
943 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
946 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
948 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
951 static inline void btrfs_item_key(struct extent_buffer
*eb
,
952 struct btrfs_disk_key
*disk_key
, int nr
)
954 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
955 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
958 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
959 struct btrfs_disk_key
*disk_key
, int nr
)
961 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
962 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
965 /* struct btrfs_dir_item */
966 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
967 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
968 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
970 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
971 struct btrfs_dir_item
*item
,
972 struct btrfs_disk_key
*key
)
974 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
977 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
978 struct btrfs_dir_item
*item
,
979 struct btrfs_disk_key
*key
)
981 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
984 /* struct btrfs_disk_key */
985 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
987 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
988 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
990 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
991 struct btrfs_disk_key
*disk
)
993 cpu
->offset
= le64_to_cpu(disk
->offset
);
994 cpu
->type
= disk
->type
;
995 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
998 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
999 struct btrfs_key
*cpu
)
1001 disk
->offset
= cpu_to_le64(cpu
->offset
);
1002 disk
->type
= cpu
->type
;
1003 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1006 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1007 struct btrfs_key
*key
, int nr
)
1009 struct btrfs_disk_key disk_key
;
1010 btrfs_node_key(eb
, &disk_key
, nr
);
1011 btrfs_disk_key_to_cpu(key
, &disk_key
);
1014 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1015 struct btrfs_key
*key
, int nr
)
1017 struct btrfs_disk_key disk_key
;
1018 btrfs_item_key(eb
, &disk_key
, nr
);
1019 btrfs_disk_key_to_cpu(key
, &disk_key
);
1022 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1023 struct btrfs_dir_item
*item
,
1024 struct btrfs_key
*key
)
1026 struct btrfs_disk_key disk_key
;
1027 btrfs_dir_item_key(eb
, item
, &disk_key
);
1028 btrfs_disk_key_to_cpu(key
, &disk_key
);
1032 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1037 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1042 /* struct btrfs_header */
1043 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1044 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1046 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1047 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1048 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 16);
1049 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1051 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1053 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1057 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1059 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1063 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1065 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1069 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1074 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1079 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1084 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1086 return (btrfs_header_level(eb
) == 0);
1089 /* struct btrfs_root_item */
1090 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1091 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1092 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1094 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1095 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1096 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1097 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1098 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1099 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1100 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1102 /* struct btrfs_super_block */
1103 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1104 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1106 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1107 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1108 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1109 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1111 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1113 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1114 chunk_root_level
, 64);
1115 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1117 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1119 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1121 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1123 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1125 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1127 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1128 root_dir_objectid
, 64);
1129 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1132 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1134 return offsetof(struct btrfs_leaf
, items
);
1137 /* struct btrfs_file_extent_item */
1138 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1140 static inline unsigned long btrfs_file_extent_inline_start(struct
1141 btrfs_file_extent_item
*e
)
1143 unsigned long offset
= (unsigned long)e
;
1144 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1148 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1150 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1153 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1154 struct btrfs_item
*e
)
1156 unsigned long offset
;
1157 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1158 return btrfs_item_size(eb
, e
) - offset
;
1161 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1163 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1165 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1166 disk_num_bytes
, 64);
1167 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1169 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1172 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1174 return sb
->s_fs_info
;
1177 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1178 const char *name
, int len
)
1180 /* if we already have a name just free it */
1184 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1188 memcpy(root
->name
, name
, len
);
1189 root
->name
[len
] ='\0';
1194 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1196 return root
->leafsize
;
1197 return root
->nodesize
;
1200 /* helper function to cast into the data area of the leaf. */
1201 #define btrfs_item_ptr(leaf, slot, type) \
1202 ((type *)(btrfs_leaf_data(leaf) + \
1203 btrfs_item_offset_nr(leaf, slot)))
1205 #define btrfs_item_ptr_offset(leaf, slot) \
1206 ((unsigned long)(btrfs_leaf_data(leaf) + \
1207 btrfs_item_offset_nr(leaf, slot)))
1209 static inline struct dentry
*fdentry(struct file
*file
) {
1210 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1211 return file
->f_dentry
;
1213 return file
->f_path
.dentry
;
1218 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1219 struct btrfs_path
*count_path
,
1221 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1222 struct btrfs_root
*root
);
1223 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1224 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1225 btrfs_fs_info
*info
,
1227 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1228 struct btrfs_block_group_cache
1229 *hint
, u64 search_start
,
1230 int data
, int owner
);
1231 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1232 struct btrfs_root
*root
, u64 owner_objectid
);
1233 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1234 struct btrfs_root
*root
, u32 size
,
1236 u64 hint
, u64 empty_size
);
1237 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1238 struct btrfs_root
*root
,
1246 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1247 struct btrfs_root
*root
, u64 new_size
);
1248 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1249 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1250 struct btrfs_root
*root
,
1251 struct btrfs_path
*path
, u64 bytenr
,
1252 u64 root_objectid
, u64 ref_generation
,
1253 u64 owner
, u64 owner_offset
);
1254 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1255 struct btrfs_root
*root
,
1256 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1257 u64 owner
, u64 owner_offset
,
1258 u64 empty_size
, u64 hint_byte
,
1259 u64 search_end
, struct btrfs_key
*ins
, int data
);
1260 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1261 struct extent_buffer
*buf
);
1262 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1263 *root
, u64 bytenr
, u64 num_bytes
,
1264 u64 root_objectid
, u64 ref_generation
,
1265 u64 owner_objectid
, u64 owner_offset
, int pin
);
1266 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1267 struct btrfs_root
*root
,
1268 struct extent_io_tree
*unpin
);
1269 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1270 struct btrfs_root
*root
,
1271 u64 bytenr
, u64 num_bytes
,
1272 u64 root_objectid
, u64 ref_generation
,
1273 u64 owner
, u64 owner_offset
);
1274 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1275 struct btrfs_root
*root
);
1276 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1277 int btrfs_read_block_groups(struct btrfs_root
*root
);
1278 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1279 struct btrfs_root
*root
, u64 bytes_used
,
1280 u64 type
, u64 chunk_tree
, u64 chunk_objectid
,
1283 int btrfs_previous_item(struct btrfs_root
*root
,
1284 struct btrfs_path
*path
, u64 min_objectid
,
1286 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1287 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1288 struct extent_buffer
*parent
, int parent_slot
,
1289 struct extent_buffer
**cow_ret
);
1290 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1291 struct btrfs_root
*root
,
1292 struct extent_buffer
*buf
,
1293 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1294 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1295 *root
, struct btrfs_path
*path
, u32 data_size
);
1296 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1297 struct btrfs_root
*root
,
1298 struct btrfs_path
*path
,
1299 u32 new_size
, int from_end
);
1300 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1301 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1303 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1304 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1305 int start_slot
, int cache_only
, u64
*last_ret
,
1306 struct btrfs_key
*progress
);
1307 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1308 struct btrfs_path
*btrfs_alloc_path(void);
1309 void btrfs_free_path(struct btrfs_path
*p
);
1310 void btrfs_init_path(struct btrfs_path
*p
);
1311 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1312 struct btrfs_path
*path
, int slot
, int nr
);
1314 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1315 struct btrfs_root
*root
,
1316 struct btrfs_path
*path
)
1318 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1321 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1322 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1323 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1324 struct btrfs_root
*root
,
1325 struct btrfs_path
*path
,
1326 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1328 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1329 struct btrfs_root
*root
,
1330 struct btrfs_path
*path
,
1331 struct btrfs_key
*key
,
1334 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1337 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1338 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1339 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1340 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1343 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1344 struct btrfs_key
*key
);
1345 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1346 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1348 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1349 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1351 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1352 btrfs_root_item
*item
, struct btrfs_key
*key
);
1353 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1354 struct btrfs_root
*latest_root
);
1356 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1357 *root
, const char *name
, int name_len
, u64 dir
,
1358 struct btrfs_key
*location
, u8 type
);
1359 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1360 struct btrfs_root
*root
,
1361 struct btrfs_path
*path
, u64 dir
,
1362 const char *name
, int name_len
,
1364 struct btrfs_dir_item
*
1365 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1366 struct btrfs_root
*root
,
1367 struct btrfs_path
*path
, u64 dir
,
1368 u64 objectid
, const char *name
, int name_len
,
1370 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1371 struct btrfs_path
*path
,
1372 const char *name
, int name_len
);
1373 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1374 struct btrfs_root
*root
,
1375 struct btrfs_path
*path
,
1376 struct btrfs_dir_item
*di
);
1377 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1378 struct btrfs_root
*root
, const char *name
,
1379 u16 name_len
, const void *data
, u16 data_len
,
1381 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1382 struct btrfs_root
*root
,
1383 struct btrfs_path
*path
, u64 dir
,
1384 const char *name
, u16 name_len
,
1387 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1388 struct btrfs_root
*fs_root
,
1389 u64 dirid
, u64
*objectid
);
1390 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1393 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1394 struct btrfs_root
*root
,
1395 const char *name
, int name_len
,
1396 u64 inode_objectid
, u64 ref_objectid
);
1397 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1398 struct btrfs_root
*root
,
1399 const char *name
, int name_len
,
1400 u64 inode_objectid
, u64 ref_objectid
);
1401 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1402 struct btrfs_root
*root
,
1403 struct btrfs_path
*path
, u64 objectid
);
1404 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1405 *root
, struct btrfs_path
*path
,
1406 struct btrfs_key
*location
, int mod
);
1409 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1410 struct btrfs_root
*root
,
1411 u64 objectid
, u64 pos
, u64 offset
,
1414 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1415 struct btrfs_root
*root
,
1416 struct btrfs_path
*path
, u64 objectid
,
1417 u64 bytenr
, int mod
);
1418 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1419 struct btrfs_root
*root
, struct inode
*inode
,
1421 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1422 struct btrfs_root
*root
,
1423 struct btrfs_path
*path
,
1424 u64 objectid
, u64 offset
,
1426 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1427 struct btrfs_root
*root
, struct btrfs_path
*path
,
1430 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1431 size_t size
, struct bio
*bio
);
1433 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1436 if (dec
<= inode
->i_blocks
)
1437 inode
->i_blocks
-= dec
;
1439 inode
->i_blocks
= 0;
1442 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1443 struct file_ra_state
*ra
, struct file
*file
,
1444 pgoff_t offset
, pgoff_t last_index
);
1445 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1447 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1448 int btrfs_readpage(struct file
*file
, struct page
*page
);
1449 void btrfs_delete_inode(struct inode
*inode
);
1450 void btrfs_put_inode(struct inode
*inode
);
1451 void btrfs_read_locked_inode(struct inode
*inode
);
1452 int btrfs_write_inode(struct inode
*inode
, int wait
);
1453 void btrfs_dirty_inode(struct inode
*inode
);
1454 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1455 void btrfs_destroy_inode(struct inode
*inode
);
1456 int btrfs_init_cachep(void);
1457 void btrfs_destroy_cachep(void);
1458 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1459 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1460 struct btrfs_root
*root
);
1461 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1463 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1464 unsigned from
, unsigned to
);
1465 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1466 size_t page_offset
, u64 start
, u64 end
,
1468 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1469 struct btrfs_root
*root
,
1470 struct inode
*inode
);
1472 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1473 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1474 extern struct file_operations btrfs_file_operations
;
1475 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1476 struct btrfs_root
*root
, struct inode
*inode
,
1477 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1479 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1480 struct btrfs_root
*root
, int cache_only
);
1483 int btrfs_init_sysfs(void);
1484 void btrfs_exit_sysfs(void);
1485 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1486 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1487 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1488 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1491 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1492 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1493 struct btrfs_root
*root
, struct inode
*inode
);
1495 u64
btrfs_parse_size(char *str
);