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 <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_io.h"
31 #include "extent_map.h"
33 struct btrfs_trans_handle
;
34 struct btrfs_transaction
;
35 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
36 extern struct kmem_cache
*btrfs_transaction_cachep
;
37 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
38 extern struct kmem_cache
*btrfs_path_cachep
;
40 #define BTRFS_MAGIC "_B4RfS_M"
42 #define BTRFS_MAX_LEVEL 8
44 /* holds pointers to all of the tree roots */
45 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
47 /* stores information about which extents are in use, and reference counts */
48 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
50 /* one per subvolume, storing files and directories */
51 #define BTRFS_FS_TREE_OBJECTID 3ULL
53 /* directory objectid inside the root tree */
54 #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL
58 * chunk tree stores translations from logical -> physical block numbering
59 * the super block points to the chunk tree
61 #define BTRFS_CHUNK_TREE_OBJECTID 5ULL
64 * stores information about which areas of a given device are in use.
65 * one per device. The tree of tree roots points to the device tree
67 #define BTRFS_DEV_TREE_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 /* the kernel device number */
157 /* type and info about this device */
160 /* partition number, 0 for whole dev */
163 /* length of the name data at the end of the item */
166 /* physical drive uuid (or lvm uuid) */
167 u8 uuid
[BTRFS_DEV_UUID_SIZE
];
169 } __attribute__ ((__packed__
));
171 struct btrfs_stripe
{
174 } __attribute__ ((__packed__
));
181 /* optimal io alignment for this chunk */
184 /* optimal io width for this chunk */
187 /* minimal io size for this chunk */
190 /* 2^16 stripes is quite a lot, a second limit is the size of a single
194 struct btrfs_stripe stripe
;
195 /* additional stripes go here */
196 } __attribute__ ((__packed__
));
198 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
200 BUG_ON(num_stripes
== 0);
201 return sizeof(struct btrfs_chunk
) +
202 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
205 #define BTRFS_FSID_SIZE 16
207 * every tree block (leaf or node) starts with this header.
209 struct btrfs_header
{
210 u8 csum
[BTRFS_CSUM_SIZE
];
211 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
212 __le64 bytenr
; /* which block this node is supposed to live in */
218 } __attribute__ ((__packed__
));
220 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
221 sizeof(struct btrfs_header)) / \
222 sizeof(struct btrfs_key_ptr))
223 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
224 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
225 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
226 sizeof(struct btrfs_item) - \
227 sizeof(struct btrfs_file_extent_item))
231 * this is a very generous portion of the super block, giving us
232 * room to translate 14 chunks with 3 stripes each.
234 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
237 * the super block basically lists the main trees of the FS
238 * it currently lacks any block count etc etc
240 struct btrfs_super_block
{
241 u8 csum
[BTRFS_CSUM_SIZE
];
242 /* the first 3 fields must match struct btrfs_header */
243 u8 fsid
[16]; /* FS specific uuid */
244 __le64 bytenr
; /* this block number */
251 __le64 root_dir_objectid
;
256 __le32 sys_chunk_array_size
;
259 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
260 } __attribute__ ((__packed__
));
263 * A leaf is full of items. offset and size tell us where to find
264 * the item in the leaf (relative to the start of the data area)
267 struct btrfs_disk_key key
;
270 } __attribute__ ((__packed__
));
273 * leaves have an item area and a data area:
274 * [item0, item1....itemN] [free space] [dataN...data1, data0]
276 * The data is separate from the items to get the keys closer together
280 struct btrfs_header header
;
281 struct btrfs_item items
[];
282 } __attribute__ ((__packed__
));
285 * all non-leaf blocks are nodes, they hold only keys and pointers to
288 struct btrfs_key_ptr
{
289 struct btrfs_disk_key key
;
292 } __attribute__ ((__packed__
));
295 struct btrfs_header header
;
296 struct btrfs_key_ptr ptrs
[];
297 } __attribute__ ((__packed__
));
300 * btrfs_paths remember the path taken from the root down to the leaf.
301 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
302 * to any other levels that are present.
304 * The slots array records the index of the item or block pointer
305 * used while walking the tree.
308 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
309 int slots
[BTRFS_MAX_LEVEL
];
315 * items in the extent btree are used to record the objectid of the
316 * owner of the block and the number of references
318 struct btrfs_extent_item
{
320 } __attribute__ ((__packed__
));
322 struct btrfs_extent_ref
{
327 } __attribute__ ((__packed__
));
329 /* dev extents record free space on individual devices. The owner
330 * field points back to the chunk allocation mapping tree that allocated
333 struct btrfs_dev_extent
{
336 } __attribute__ ((__packed__
));
339 struct btrfs_inode_ref
{
342 } __attribute__ ((__packed__
));
344 struct btrfs_timespec
{
347 } __attribute__ ((__packed__
));
350 * there is no padding here on purpose. If you want to extent the inode,
351 * make a new item type
353 struct btrfs_inode_item
{
365 struct btrfs_timespec atime
;
366 struct btrfs_timespec ctime
;
367 struct btrfs_timespec mtime
;
368 struct btrfs_timespec otime
;
369 } __attribute__ ((__packed__
));
371 struct btrfs_dir_item
{
372 struct btrfs_disk_key location
;
376 } __attribute__ ((__packed__
));
378 struct btrfs_root_item
{
379 struct btrfs_inode_item inode
;
386 struct btrfs_disk_key drop_progress
;
389 } __attribute__ ((__packed__
));
391 #define BTRFS_FILE_EXTENT_REG 0
392 #define BTRFS_FILE_EXTENT_INLINE 1
394 struct btrfs_file_extent_item
{
398 * disk space consumed by the extent, checksum blocks are included
402 __le64 disk_num_bytes
;
404 * the logical offset in file blocks (no csums)
405 * this extent record is for. This allows a file extent to point
406 * into the middle of an existing extent on disk, sharing it
407 * between two snapshots (useful if some bytes in the middle of the
408 * extent have changed
412 * the logical number of file blocks (no csums included)
415 } __attribute__ ((__packed__
));
417 struct btrfs_csum_item
{
419 } __attribute__ ((__packed__
));
421 /* different types of block groups (and chunks) */
422 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
423 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
424 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
427 struct btrfs_block_group_item
{
430 __le64 chunk_objectid
;
432 } __attribute__ ((__packed__
));
434 struct btrfs_space_info
{
440 struct list_head list
;
443 struct btrfs_block_group_cache
{
444 struct btrfs_key key
;
445 struct btrfs_block_group_item item
;
446 struct btrfs_space_info
*space_info
;
453 struct btrfs_fs_info
{
454 u8 fsid
[BTRFS_FSID_SIZE
];
455 struct btrfs_root
*extent_root
;
456 struct btrfs_root
*tree_root
;
457 struct btrfs_root
*chunk_root
;
458 struct btrfs_root
*dev_root
;
459 struct radix_tree_root fs_roots_radix
;
461 struct extent_io_tree free_space_cache
;
462 struct extent_io_tree block_group_cache
;
463 struct extent_io_tree pinned_extents
;
464 struct extent_io_tree pending_del
;
465 struct extent_io_tree extent_ins
;
467 /* logical->physical extent mapping */
468 struct btrfs_mapping_tree mapping_tree
;
471 u64 last_trans_committed
;
472 unsigned long mount_opt
;
476 struct btrfs_transaction
*running_transaction
;
477 struct btrfs_super_block super_copy
;
478 struct extent_buffer
*sb_buffer
;
479 struct block_device
*__bdev
;
480 struct super_block
*sb
;
481 struct inode
*btree_inode
;
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 list_head devices
;
503 struct list_head space_info
;
504 spinlock_t delalloc_lock
;
505 spinlock_t new_trans_lock
;
512 * in ram representation of the tree. extent_root is used for all allocations
513 * and for the extent tree extent_root root.
516 struct extent_buffer
*node
;
517 struct extent_buffer
*commit_root
;
518 struct btrfs_root_item root_item
;
519 struct btrfs_key root_key
;
520 struct btrfs_fs_info
*fs_info
;
522 struct kobject root_kobj
;
523 struct completion kobj_unregister
;
527 /* data allocations are done in sectorsize units */
530 /* node allocations are done in nodesize units */
533 /* leaf allocations are done in leafsize units */
540 u64 last_inode_alloc
;
543 struct btrfs_key defrag_progress
;
549 /* the dirty list is only used by non-reference counted roots */
550 struct list_head dirty_list
;
555 * inode items have the data typically returned from stat and store other
556 * info about object characteristics. There is one for every file and dir in
559 #define BTRFS_INODE_ITEM_KEY 1
560 #define BTRFS_INODE_REF_KEY 2
561 #define BTRFS_XATTR_ITEM_KEY 8
562 /* reserve 2-15 close to the inode for later flexibility */
565 * dir items are the name -> inode pointers in a directory. There is one
566 * for every name in a directory.
568 #define BTRFS_DIR_ITEM_KEY 16
569 #define BTRFS_DIR_INDEX_KEY 17
571 * extent data is for file data
573 #define BTRFS_EXTENT_DATA_KEY 18
575 * csum items have the checksums for data in the extents
577 #define BTRFS_CSUM_ITEM_KEY 19
579 /* reserve 20-31 for other file stuff */
582 * root items point to tree roots. There are typically in the root
583 * tree used by the super block to find all the other trees
585 #define BTRFS_ROOT_ITEM_KEY 32
587 * extent items are in the extent map tree. These record which blocks
588 * are used, and how many references there are to each block
590 #define BTRFS_EXTENT_ITEM_KEY 33
591 #define BTRFS_EXTENT_REF_KEY 34
594 * block groups give us hints into the extent allocation trees. Which
595 * blocks are free etc etc
597 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
599 #define BTRFS_DEV_EXTENT_KEY 75
600 #define BTRFS_DEV_ITEM_KEY 76
601 #define BTRFS_CHUNK_ITEM_KEY 77
604 * string items are for debugging. They just store a short string of
607 #define BTRFS_STRING_ITEM_KEY 253
609 #define BTRFS_MOUNT_NODATASUM (1 << 0)
610 #define BTRFS_MOUNT_NODATACOW (1 << 1)
611 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
612 #define BTRFS_MOUNT_SSD (1 << 3)
614 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
615 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
616 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
621 #define BTRFS_INODE_NODATASUM (1 << 0)
622 #define BTRFS_INODE_NODATACOW (1 << 1)
623 #define BTRFS_INODE_READONLY (1 << 2)
624 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
626 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
628 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
630 /* some macros to generate set/get funcs for the struct fields. This
631 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
634 #define le8_to_cpu(v) (v)
635 #define cpu_to_le8(v) (v)
638 #define read_eb_member(eb, ptr, type, member, result) ( \
639 read_extent_buffer(eb, (char *)(result), \
640 ((unsigned long)(ptr)) + \
641 offsetof(type, member), \
642 sizeof(((type *)0)->member)))
644 #define write_eb_member(eb, ptr, type, member, result) ( \
645 write_extent_buffer(eb, (char *)(result), \
646 ((unsigned long)(ptr)) + \
647 offsetof(type, member), \
648 sizeof(((type *)0)->member)))
650 #ifndef BTRFS_SETGET_FUNCS
651 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
652 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
653 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
656 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
657 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
659 type *p = kmap_atomic(eb->first_page, KM_USER0); \
660 u##bits res = le##bits##_to_cpu(p->member); \
661 kunmap_atomic(p, KM_USER0); \
664 static inline void btrfs_set_##name(struct extent_buffer *eb, \
667 type *p = kmap_atomic(eb->first_page, KM_USER0); \
668 p->member = cpu_to_le##bits(val); \
669 kunmap_atomic(p, KM_USER0); \
672 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
673 static inline u##bits btrfs_##name(type *s) \
675 return le##bits##_to_cpu(s->member); \
677 static inline void btrfs_set_##name(type *s, u##bits val) \
679 s->member = cpu_to_le##bits(val); \
682 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
683 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
684 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
685 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
686 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
687 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
688 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
689 BTRFS_SETGET_FUNCS(device_rdev
, struct btrfs_dev_item
, rdev
, 64);
690 BTRFS_SETGET_FUNCS(device_partition
, struct btrfs_dev_item
, partition
, 32);
691 BTRFS_SETGET_FUNCS(device_name_len
, struct btrfs_dev_item
, name_len
, 16);
693 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
695 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
698 static inline char *btrfs_device_name(struct btrfs_dev_item
*d
)
700 return (char *)(d
+ 1);
703 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
704 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
705 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
706 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
707 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
708 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
709 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
710 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
711 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
714 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
716 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
718 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
722 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
723 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
725 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
726 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
728 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
731 unsigned long offset
= (unsigned long)c
;
732 offset
+= offsetof(struct btrfs_chunk
, stripe
);
733 offset
+= nr
* sizeof(struct btrfs_stripe
);
734 return (struct btrfs_stripe
*)offset
;
737 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
738 struct btrfs_chunk
*c
, int nr
)
740 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
743 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
744 struct btrfs_chunk
*c
, int nr
,
747 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
750 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
751 struct btrfs_chunk
*c
, int nr
)
753 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
756 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
757 struct btrfs_chunk
*c
, int nr
,
760 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
763 /* struct btrfs_block_group_item */
764 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
766 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
768 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree
, struct btrfs_block_group_item
,
770 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree
, struct btrfs_block_group_item
,
772 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
773 struct btrfs_block_group_item
, chunk_objectid
, 64);
774 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd
,
775 struct btrfs_block_group_item
, chunk_objectid
, 64);
776 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
777 struct btrfs_block_group_item
, flags
, 64);
778 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
779 struct btrfs_block_group_item
, flags
, 64);
781 /* struct btrfs_inode_ref */
782 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
784 /* struct btrfs_inode_item */
785 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
786 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
787 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
788 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
789 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
790 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
791 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
792 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
793 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
794 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
795 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
798 static inline struct btrfs_timespec
*
799 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
801 unsigned long ptr
= (unsigned long)inode_item
;
802 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
803 return (struct btrfs_timespec
*)ptr
;
806 static inline struct btrfs_timespec
*
807 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
809 unsigned long ptr
= (unsigned long)inode_item
;
810 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
811 return (struct btrfs_timespec
*)ptr
;
814 static inline struct btrfs_timespec
*
815 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
817 unsigned long ptr
= (unsigned long)inode_item
;
818 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
819 return (struct btrfs_timespec
*)ptr
;
822 static inline struct btrfs_timespec
*
823 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
825 unsigned long ptr
= (unsigned long)inode_item
;
826 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
827 return (struct btrfs_timespec
*)ptr
;
830 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
831 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
833 /* struct btrfs_extent_item */
834 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
836 /* struct btrfs_dev_extent */
837 BTRFS_SETGET_FUNCS(dev_extent_owner
, struct btrfs_dev_extent
, owner
, 64);
838 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
840 /* struct btrfs_extent_ref */
841 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
842 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
843 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
844 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
846 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
847 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
849 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
851 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
853 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
856 /* struct btrfs_node */
857 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
858 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
860 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
863 ptr
= offsetof(struct btrfs_node
, ptrs
) +
864 sizeof(struct btrfs_key_ptr
) * nr
;
865 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
868 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
872 ptr
= offsetof(struct btrfs_node
, ptrs
) +
873 sizeof(struct btrfs_key_ptr
) * nr
;
874 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
877 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
880 ptr
= offsetof(struct btrfs_node
, ptrs
) +
881 sizeof(struct btrfs_key_ptr
) * nr
;
882 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
885 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
889 ptr
= offsetof(struct btrfs_node
, ptrs
) +
890 sizeof(struct btrfs_key_ptr
) * nr
;
891 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
894 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
896 return offsetof(struct btrfs_node
, ptrs
) +
897 sizeof(struct btrfs_key_ptr
) * nr
;
900 void btrfs_node_key(struct extent_buffer
*eb
,
901 struct btrfs_disk_key
*disk_key
, int nr
);
903 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
904 struct btrfs_disk_key
*disk_key
, int nr
)
907 ptr
= btrfs_node_key_ptr_offset(nr
);
908 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
909 struct btrfs_key_ptr
, key
, disk_key
);
912 /* struct btrfs_item */
913 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
914 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
916 static inline unsigned long btrfs_item_nr_offset(int nr
)
918 return offsetof(struct btrfs_leaf
, items
) +
919 sizeof(struct btrfs_item
) * nr
;
922 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
925 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
928 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
929 struct btrfs_item
*item
)
931 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
934 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
936 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
939 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
941 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
944 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
946 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
949 static inline void btrfs_item_key(struct extent_buffer
*eb
,
950 struct btrfs_disk_key
*disk_key
, int nr
)
952 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
953 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
956 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
957 struct btrfs_disk_key
*disk_key
, int nr
)
959 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
960 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
963 /* struct btrfs_dir_item */
964 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
965 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
966 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
968 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
969 struct btrfs_dir_item
*item
,
970 struct btrfs_disk_key
*key
)
972 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
975 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
976 struct btrfs_dir_item
*item
,
977 struct btrfs_disk_key
*key
)
979 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
982 /* struct btrfs_disk_key */
983 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
985 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
986 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
988 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
989 struct btrfs_disk_key
*disk
)
991 cpu
->offset
= le64_to_cpu(disk
->offset
);
992 cpu
->type
= disk
->type
;
993 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
996 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
997 struct btrfs_key
*cpu
)
999 disk
->offset
= cpu_to_le64(cpu
->offset
);
1000 disk
->type
= cpu
->type
;
1001 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1004 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1005 struct btrfs_key
*key
, int nr
)
1007 struct btrfs_disk_key disk_key
;
1008 btrfs_node_key(eb
, &disk_key
, nr
);
1009 btrfs_disk_key_to_cpu(key
, &disk_key
);
1012 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1013 struct btrfs_key
*key
, int nr
)
1015 struct btrfs_disk_key disk_key
;
1016 btrfs_item_key(eb
, &disk_key
, nr
);
1017 btrfs_disk_key_to_cpu(key
, &disk_key
);
1020 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1021 struct btrfs_dir_item
*item
,
1022 struct btrfs_key
*key
)
1024 struct btrfs_disk_key disk_key
;
1025 btrfs_dir_item_key(eb
, item
, &disk_key
);
1026 btrfs_disk_key_to_cpu(key
, &disk_key
);
1030 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1035 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1040 /* struct btrfs_header */
1041 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1042 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1044 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1045 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1046 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 16);
1047 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1049 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1051 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1055 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1057 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1061 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1063 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1067 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1072 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1077 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1082 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1084 return (btrfs_header_level(eb
) == 0);
1087 /* struct btrfs_root_item */
1088 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1089 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1090 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1092 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1093 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1094 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1095 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1096 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1097 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1098 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1100 /* struct btrfs_super_block */
1101 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1102 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1104 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1105 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1106 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1107 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1109 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1111 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1112 chunk_root_level
, 64);
1113 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1115 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1117 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1119 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1121 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1123 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1125 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1126 root_dir_objectid
, 64);
1128 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1130 return offsetof(struct btrfs_leaf
, items
);
1133 /* struct btrfs_file_extent_item */
1134 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1136 static inline unsigned long btrfs_file_extent_inline_start(struct
1137 btrfs_file_extent_item
*e
)
1139 unsigned long offset
= (unsigned long)e
;
1140 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1144 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1146 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1149 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1150 struct btrfs_item
*e
)
1152 unsigned long offset
;
1153 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1154 return btrfs_item_size(eb
, e
) - offset
;
1157 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1159 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1161 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1162 disk_num_bytes
, 64);
1163 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1165 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1168 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1170 return sb
->s_fs_info
;
1173 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1174 const char *name
, int len
)
1176 /* if we already have a name just free it */
1180 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1184 memcpy(root
->name
, name
, len
);
1185 root
->name
[len
] ='\0';
1190 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1192 return root
->leafsize
;
1193 return root
->nodesize
;
1196 /* helper function to cast into the data area of the leaf. */
1197 #define btrfs_item_ptr(leaf, slot, type) \
1198 ((type *)(btrfs_leaf_data(leaf) + \
1199 btrfs_item_offset_nr(leaf, slot)))
1201 #define btrfs_item_ptr_offset(leaf, slot) \
1202 ((unsigned long)(btrfs_leaf_data(leaf) + \
1203 btrfs_item_offset_nr(leaf, slot)))
1205 static inline struct dentry
*fdentry(struct file
*file
) {
1206 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1207 return file
->f_dentry
;
1209 return file
->f_path
.dentry
;
1214 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1215 struct btrfs_path
*count_path
,
1217 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1218 struct btrfs_root
*root
);
1219 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1220 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1221 btrfs_fs_info
*info
,
1223 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1224 struct btrfs_block_group_cache
1225 *hint
, u64 search_start
,
1226 int data
, int owner
);
1227 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1228 struct btrfs_root
*root
, u64 owner_objectid
);
1229 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1230 struct btrfs_root
*root
, u32 size
,
1232 u64 hint
, u64 empty_size
);
1233 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1234 struct btrfs_root
*root
,
1242 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1243 struct btrfs_root
*root
, u64 new_size
);
1244 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1245 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1246 struct btrfs_root
*root
,
1247 struct btrfs_path
*path
, u64 bytenr
,
1248 u64 root_objectid
, u64 ref_generation
,
1249 u64 owner
, u64 owner_offset
);
1250 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1251 struct btrfs_root
*root
,
1252 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1253 u64 owner
, u64 owner_offset
,
1254 u64 empty_size
, u64 hint_byte
,
1255 u64 search_end
, struct btrfs_key
*ins
, int data
);
1256 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1257 struct extent_buffer
*buf
);
1258 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1259 *root
, u64 bytenr
, u64 num_bytes
,
1260 u64 root_objectid
, u64 ref_generation
,
1261 u64 owner_objectid
, u64 owner_offset
, int pin
);
1262 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1263 struct btrfs_root
*root
,
1264 struct extent_io_tree
*unpin
);
1265 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1266 struct btrfs_root
*root
,
1267 u64 bytenr
, u64 num_bytes
,
1268 u64 root_objectid
, u64 ref_generation
,
1269 u64 owner
, u64 owner_offset
);
1270 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1271 struct btrfs_root
*root
);
1272 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1273 int btrfs_read_block_groups(struct btrfs_root
*root
);
1274 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1275 struct btrfs_root
*root
, u64 bytes_used
,
1276 u64 type
, u64 chunk_tree
, u64 chunk_objectid
,
1279 int btrfs_previous_item(struct btrfs_root
*root
,
1280 struct btrfs_path
*path
, u64 min_objectid
,
1282 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1283 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1284 struct extent_buffer
*parent
, int parent_slot
,
1285 struct extent_buffer
**cow_ret
);
1286 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1287 struct btrfs_root
*root
,
1288 struct extent_buffer
*buf
,
1289 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1290 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1291 *root
, struct btrfs_path
*path
, u32 data_size
);
1292 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1293 struct btrfs_root
*root
,
1294 struct btrfs_path
*path
,
1295 u32 new_size
, int from_end
);
1296 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1297 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1299 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1300 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1301 int start_slot
, int cache_only
, u64
*last_ret
,
1302 struct btrfs_key
*progress
);
1303 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1304 struct btrfs_path
*btrfs_alloc_path(void);
1305 void btrfs_free_path(struct btrfs_path
*p
);
1306 void btrfs_init_path(struct btrfs_path
*p
);
1307 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1308 struct btrfs_path
*path
, int slot
, int nr
);
1310 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1311 struct btrfs_root
*root
,
1312 struct btrfs_path
*path
)
1314 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1317 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1318 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1319 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1320 struct btrfs_root
*root
,
1321 struct btrfs_path
*path
,
1322 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1324 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1325 struct btrfs_root
*root
,
1326 struct btrfs_path
*path
,
1327 struct btrfs_key
*key
,
1330 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1333 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1334 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1335 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1336 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1339 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1340 struct btrfs_key
*key
);
1341 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1342 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1344 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1345 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1347 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1348 btrfs_root_item
*item
, struct btrfs_key
*key
);
1349 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1350 struct btrfs_root
*latest_root
);
1352 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1353 *root
, const char *name
, int name_len
, u64 dir
,
1354 struct btrfs_key
*location
, u8 type
);
1355 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1356 struct btrfs_root
*root
,
1357 struct btrfs_path
*path
, u64 dir
,
1358 const char *name
, int name_len
,
1360 struct btrfs_dir_item
*
1361 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1362 struct btrfs_root
*root
,
1363 struct btrfs_path
*path
, u64 dir
,
1364 u64 objectid
, const char *name
, int name_len
,
1366 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1367 struct btrfs_path
*path
,
1368 const char *name
, int name_len
);
1369 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1370 struct btrfs_root
*root
,
1371 struct btrfs_path
*path
,
1372 struct btrfs_dir_item
*di
);
1373 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1374 struct btrfs_root
*root
, const char *name
,
1375 u16 name_len
, const void *data
, u16 data_len
,
1377 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1378 struct btrfs_root
*root
,
1379 struct btrfs_path
*path
, u64 dir
,
1380 const char *name
, u16 name_len
,
1383 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1384 struct btrfs_root
*fs_root
,
1385 u64 dirid
, u64
*objectid
);
1386 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1389 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1390 struct btrfs_root
*root
,
1391 const char *name
, int name_len
,
1392 u64 inode_objectid
, u64 ref_objectid
);
1393 int btrfs_del_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_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1398 struct btrfs_root
*root
,
1399 struct btrfs_path
*path
, u64 objectid
);
1400 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1401 *root
, struct btrfs_path
*path
,
1402 struct btrfs_key
*location
, int mod
);
1405 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1406 struct btrfs_root
*root
,
1407 u64 objectid
, u64 pos
, u64 offset
,
1410 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1411 struct btrfs_root
*root
,
1412 struct btrfs_path
*path
, u64 objectid
,
1413 u64 bytenr
, int mod
);
1414 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1415 struct btrfs_root
*root
, struct inode
*inode
,
1417 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1418 struct btrfs_root
*root
,
1419 struct btrfs_path
*path
,
1420 u64 objectid
, u64 offset
,
1422 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1423 struct btrfs_root
*root
, struct btrfs_path
*path
,
1426 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1429 if (dec
<= inode
->i_blocks
)
1430 inode
->i_blocks
-= dec
;
1432 inode
->i_blocks
= 0;
1435 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1436 struct file_ra_state
*ra
, struct file
*file
,
1437 pgoff_t offset
, pgoff_t last_index
);
1438 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1440 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1441 int btrfs_readpage(struct file
*file
, struct page
*page
);
1442 void btrfs_delete_inode(struct inode
*inode
);
1443 void btrfs_put_inode(struct inode
*inode
);
1444 void btrfs_read_locked_inode(struct inode
*inode
);
1445 int btrfs_write_inode(struct inode
*inode
, int wait
);
1446 void btrfs_dirty_inode(struct inode
*inode
);
1447 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1448 void btrfs_destroy_inode(struct inode
*inode
);
1449 int btrfs_init_cachep(void);
1450 void btrfs_destroy_cachep(void);
1451 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1452 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1453 struct btrfs_root
*root
);
1454 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1456 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1457 unsigned from
, unsigned to
);
1458 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1459 size_t page_offset
, u64 start
, u64 end
,
1461 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1462 struct btrfs_root
*root
,
1463 struct inode
*inode
);
1465 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1466 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1467 extern struct file_operations btrfs_file_operations
;
1468 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1469 struct btrfs_root
*root
, struct inode
*inode
,
1470 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1472 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1473 struct btrfs_root
*root
, int cache_only
);
1476 int btrfs_init_sysfs(void);
1477 void btrfs_exit_sysfs(void);
1478 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1479 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1480 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1481 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1484 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1485 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1486 struct btrfs_root
*root
, struct inode
*inode
);
1488 u64
btrfs_parse_size(char *str
);