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 "_B5RfS_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
51 * chunk tree stores translations from logical -> physical block numbering
52 * the super block points to the chunk tree
54 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
57 * stores information about which areas of a given device are in use.
58 * one per device. The tree of tree roots points to the device tree
60 #define BTRFS_DEV_TREE_OBJECTID 4ULL
62 /* one per subvolume, storing files and directories */
63 #define BTRFS_FS_TREE_OBJECTID 5ULL
65 /* directory objectid inside the root tree */
66 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
69 * All files have objectids higher than this.
71 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
75 * the device items go into the chunk tree. The key is in the form
76 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
78 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
81 * we can actually store much bigger names, but lets not confuse the rest
84 #define BTRFS_NAME_LEN 255
86 /* 32 bytes in various csum fields */
87 #define BTRFS_CSUM_SIZE 32
88 /* four bytes for CRC32 */
89 #define BTRFS_CRC32_SIZE 4
90 #define BTRFS_EMPTY_DIR_SIZE 0
92 #define BTRFS_FT_UNKNOWN 0
93 #define BTRFS_FT_REG_FILE 1
94 #define BTRFS_FT_DIR 2
95 #define BTRFS_FT_CHRDEV 3
96 #define BTRFS_FT_BLKDEV 4
97 #define BTRFS_FT_FIFO 5
98 #define BTRFS_FT_SOCK 6
99 #define BTRFS_FT_SYMLINK 7
100 #define BTRFS_FT_XATTR 8
101 #define BTRFS_FT_MAX 9
104 * the key defines the order in the tree, and so it also defines (optimal)
105 * block layout. objectid corresonds to the inode number. The flags
106 * tells us things about the object, and is a kind of stream selector.
107 * so for a given inode, keys with flags of 1 might refer to the inode
108 * data, flags of 2 may point to file data in the btree and flags == 3
109 * may point to extents.
111 * offset is the starting byte offset for this key in the stream.
113 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
114 * in cpu native order. Otherwise they are identical and their sizes
115 * should be the same (ie both packed)
117 struct btrfs_disk_key
{
121 } __attribute__ ((__packed__
));
127 } __attribute__ ((__packed__
));
129 struct btrfs_mapping_tree
{
130 struct extent_map_tree map_tree
;
133 #define BTRFS_DEV_UUID_SIZE 16
134 struct btrfs_dev_item
{
135 /* the internal btrfs device id */
138 /* size of the device */
144 /* optimal io alignment for this device */
147 /* optimal io width for this device */
150 /* minimal io size for this device */
153 /* type and info about this device */
156 /* btrfs generated uuid for this device */
157 u8 uuid
[BTRFS_DEV_UUID_SIZE
];
158 } __attribute__ ((__packed__
));
160 struct btrfs_stripe
{
163 } __attribute__ ((__packed__
));
170 /* optimal io alignment for this chunk */
173 /* optimal io width for this chunk */
176 /* minimal io size for this chunk */
179 /* 2^16 stripes is quite a lot, a second limit is the size of a single
183 struct btrfs_stripe stripe
;
184 /* additional stripes go here */
185 } __attribute__ ((__packed__
));
187 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
189 BUG_ON(num_stripes
== 0);
190 return sizeof(struct btrfs_chunk
) +
191 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
194 #define BTRFS_FSID_SIZE 16
196 * every tree block (leaf or node) starts with this header.
198 struct btrfs_header
{
199 u8 csum
[BTRFS_CSUM_SIZE
];
200 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
201 __le64 bytenr
; /* which block this node is supposed to live in */
207 } __attribute__ ((__packed__
));
209 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
210 sizeof(struct btrfs_header)) / \
211 sizeof(struct btrfs_key_ptr))
212 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
213 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
214 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
215 sizeof(struct btrfs_item) - \
216 sizeof(struct btrfs_file_extent_item))
220 * this is a very generous portion of the super block, giving us
221 * room to translate 14 chunks with 3 stripes each.
223 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
226 * the super block basically lists the main trees of the FS
227 * it currently lacks any block count etc etc
229 struct btrfs_super_block
{
230 u8 csum
[BTRFS_CSUM_SIZE
];
231 /* the first 3 fields must match struct btrfs_header */
232 u8 fsid
[16]; /* FS specific uuid */
233 __le64 bytenr
; /* this block number */
240 __le64 root_dir_objectid
;
246 __le32 sys_chunk_array_size
;
249 struct btrfs_dev_item dev_item
;
250 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
251 } __attribute__ ((__packed__
));
254 * A leaf is full of items. offset and size tell us where to find
255 * the item in the leaf (relative to the start of the data area)
258 struct btrfs_disk_key key
;
261 } __attribute__ ((__packed__
));
264 * leaves have an item area and a data area:
265 * [item0, item1....itemN] [free space] [dataN...data1, data0]
267 * The data is separate from the items to get the keys closer together
271 struct btrfs_header header
;
272 struct btrfs_item items
[];
273 } __attribute__ ((__packed__
));
276 * all non-leaf blocks are nodes, they hold only keys and pointers to
279 struct btrfs_key_ptr
{
280 struct btrfs_disk_key key
;
283 } __attribute__ ((__packed__
));
286 struct btrfs_header header
;
287 struct btrfs_key_ptr ptrs
[];
288 } __attribute__ ((__packed__
));
291 * btrfs_paths remember the path taken from the root down to the leaf.
292 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
293 * to any other levels that are present.
295 * The slots array records the index of the item or block pointer
296 * used while walking the tree.
299 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
300 int slots
[BTRFS_MAX_LEVEL
];
306 * items in the extent btree are used to record the objectid of the
307 * owner of the block and the number of references
309 struct btrfs_extent_item
{
311 } __attribute__ ((__packed__
));
313 struct btrfs_extent_ref
{
318 } __attribute__ ((__packed__
));
320 /* dev extents record free space on individual devices. The owner
321 * field points back to the chunk allocation mapping tree that allocated
324 struct btrfs_dev_extent
{
327 } __attribute__ ((__packed__
));
330 struct btrfs_inode_ref
{
333 } __attribute__ ((__packed__
));
335 struct btrfs_timespec
{
338 } __attribute__ ((__packed__
));
341 * there is no padding here on purpose. If you want to extent the inode,
342 * make a new item type
344 struct btrfs_inode_item
{
356 struct btrfs_timespec atime
;
357 struct btrfs_timespec ctime
;
358 struct btrfs_timespec mtime
;
359 struct btrfs_timespec otime
;
360 } __attribute__ ((__packed__
));
362 struct btrfs_dir_item
{
363 struct btrfs_disk_key location
;
367 } __attribute__ ((__packed__
));
369 struct btrfs_root_item
{
370 struct btrfs_inode_item inode
;
377 struct btrfs_disk_key drop_progress
;
380 } __attribute__ ((__packed__
));
382 #define BTRFS_FILE_EXTENT_REG 0
383 #define BTRFS_FILE_EXTENT_INLINE 1
385 struct btrfs_file_extent_item
{
389 * disk space consumed by the extent, checksum blocks are included
393 __le64 disk_num_bytes
;
395 * the logical offset in file blocks (no csums)
396 * this extent record is for. This allows a file extent to point
397 * into the middle of an existing extent on disk, sharing it
398 * between two snapshots (useful if some bytes in the middle of the
399 * extent have changed
403 * the logical number of file blocks (no csums included)
406 } __attribute__ ((__packed__
));
408 struct btrfs_csum_item
{
410 } __attribute__ ((__packed__
));
412 /* different types of block groups (and chunks) */
413 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
414 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
415 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
418 struct btrfs_block_group_item
{
421 __le64 chunk_objectid
;
423 } __attribute__ ((__packed__
));
425 struct btrfs_space_info
{
431 struct list_head list
;
434 struct btrfs_block_group_cache
{
435 struct btrfs_key key
;
436 struct btrfs_block_group_item item
;
437 struct btrfs_space_info
*space_info
;
444 struct btrfs_fs_devices
;
445 struct btrfs_fs_info
{
446 u8 fsid
[BTRFS_FSID_SIZE
];
447 struct btrfs_root
*extent_root
;
448 struct btrfs_root
*tree_root
;
449 struct btrfs_root
*chunk_root
;
450 struct btrfs_root
*dev_root
;
451 struct radix_tree_root fs_roots_radix
;
453 struct extent_io_tree free_space_cache
;
454 struct extent_io_tree block_group_cache
;
455 struct extent_io_tree pinned_extents
;
456 struct extent_io_tree pending_del
;
457 struct extent_io_tree extent_ins
;
459 /* logical->physical extent mapping */
460 struct btrfs_mapping_tree mapping_tree
;
463 u64 last_trans_committed
;
464 unsigned long mount_opt
;
468 struct btrfs_transaction
*running_transaction
;
469 struct btrfs_super_block super_copy
;
470 struct extent_buffer
*sb_buffer
;
471 struct block_device
*__bdev
;
472 struct super_block
*sb
;
473 struct inode
*btree_inode
;
474 spinlock_t hash_lock
;
475 struct mutex trans_mutex
;
476 struct mutex fs_mutex
;
477 struct list_head trans_list
;
478 struct list_head hashers
;
479 struct list_head dead_roots
;
480 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
481 struct work_struct trans_work
;
483 struct delayed_work trans_work
;
485 struct kobject super_kobj
;
486 struct completion kobj_unregister
;
489 unsigned long throttles
;
492 struct list_head dirty_cowonly_roots
;
494 struct btrfs_fs_devices
*fs_devices
;
495 struct list_head space_info
;
496 spinlock_t delalloc_lock
;
497 spinlock_t new_trans_lock
;
504 * in ram representation of the tree. extent_root is used for all allocations
505 * and for the extent tree extent_root root.
508 struct extent_buffer
*node
;
509 struct extent_buffer
*commit_root
;
510 struct btrfs_root_item root_item
;
511 struct btrfs_key root_key
;
512 struct btrfs_fs_info
*fs_info
;
514 struct kobject root_kobj
;
515 struct completion kobj_unregister
;
519 /* data allocations are done in sectorsize units */
522 /* node allocations are done in nodesize units */
525 /* leaf allocations are done in leafsize units */
532 u64 last_inode_alloc
;
535 struct btrfs_key defrag_progress
;
541 /* the dirty list is only used by non-reference counted roots */
542 struct list_head dirty_list
;
547 * inode items have the data typically returned from stat and store other
548 * info about object characteristics. There is one for every file and dir in
551 #define BTRFS_INODE_ITEM_KEY 1
552 #define BTRFS_INODE_REF_KEY 2
553 #define BTRFS_XATTR_ITEM_KEY 8
554 /* reserve 2-15 close to the inode for later flexibility */
557 * dir items are the name -> inode pointers in a directory. There is one
558 * for every name in a directory.
560 #define BTRFS_DIR_ITEM_KEY 16
561 #define BTRFS_DIR_INDEX_KEY 17
563 * extent data is for file data
565 #define BTRFS_EXTENT_DATA_KEY 18
567 * csum items have the checksums for data in the extents
569 #define BTRFS_CSUM_ITEM_KEY 19
571 /* reserve 20-31 for other file stuff */
574 * root items point to tree roots. There are typically in the root
575 * tree used by the super block to find all the other trees
577 #define BTRFS_ROOT_ITEM_KEY 32
579 * extent items are in the extent map tree. These record which blocks
580 * are used, and how many references there are to each block
582 #define BTRFS_EXTENT_ITEM_KEY 33
583 #define BTRFS_EXTENT_REF_KEY 34
586 * block groups give us hints into the extent allocation trees. Which
587 * blocks are free etc etc
589 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
591 #define BTRFS_DEV_EXTENT_KEY 75
592 #define BTRFS_DEV_ITEM_KEY 76
593 #define BTRFS_CHUNK_ITEM_KEY 77
596 * string items are for debugging. They just store a short string of
599 #define BTRFS_STRING_ITEM_KEY 253
601 #define BTRFS_MOUNT_NODATASUM (1 << 0)
602 #define BTRFS_MOUNT_NODATACOW (1 << 1)
603 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
604 #define BTRFS_MOUNT_SSD (1 << 3)
606 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
607 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
608 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
613 #define BTRFS_INODE_NODATASUM (1 << 0)
614 #define BTRFS_INODE_NODATACOW (1 << 1)
615 #define BTRFS_INODE_READONLY (1 << 2)
616 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
618 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
620 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
622 /* some macros to generate set/get funcs for the struct fields. This
623 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
626 #define le8_to_cpu(v) (v)
627 #define cpu_to_le8(v) (v)
630 #define read_eb_member(eb, ptr, type, member, result) ( \
631 read_extent_buffer(eb, (char *)(result), \
632 ((unsigned long)(ptr)) + \
633 offsetof(type, member), \
634 sizeof(((type *)0)->member)))
636 #define write_eb_member(eb, ptr, type, member, result) ( \
637 write_extent_buffer(eb, (char *)(result), \
638 ((unsigned long)(ptr)) + \
639 offsetof(type, member), \
640 sizeof(((type *)0)->member)))
642 #ifndef BTRFS_SETGET_FUNCS
643 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
644 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
645 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
648 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
649 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
651 type *p = kmap_atomic(eb->first_page, KM_USER0); \
652 u##bits res = le##bits##_to_cpu(p->member); \
653 kunmap_atomic(p, KM_USER0); \
656 static inline void btrfs_set_##name(struct extent_buffer *eb, \
659 type *p = kmap_atomic(eb->first_page, KM_USER0); \
660 p->member = cpu_to_le##bits(val); \
661 kunmap_atomic(p, KM_USER0); \
664 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
665 static inline u##bits btrfs_##name(type *s) \
667 return le##bits##_to_cpu(s->member); \
669 static inline void btrfs_set_##name(type *s, u##bits val) \
671 s->member = cpu_to_le##bits(val); \
674 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
675 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
676 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
677 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
678 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
679 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
680 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
682 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
683 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
685 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
687 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
689 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
691 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
693 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
695 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
697 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
700 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
701 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
702 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
703 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
704 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
705 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
706 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
707 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
708 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
710 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
711 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
713 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
715 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
717 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
719 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
720 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
722 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
723 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
725 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
728 unsigned long offset
= (unsigned long)c
;
729 offset
+= offsetof(struct btrfs_chunk
, stripe
);
730 offset
+= nr
* sizeof(struct btrfs_stripe
);
731 return (struct btrfs_stripe
*)offset
;
734 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
735 struct btrfs_chunk
*c
, int nr
)
737 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
740 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
741 struct btrfs_chunk
*c
, int nr
,
744 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
747 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
748 struct btrfs_chunk
*c
, int nr
)
750 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
753 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
754 struct btrfs_chunk
*c
, int nr
,
757 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
760 /* struct btrfs_block_group_item */
761 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
763 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
765 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree
, struct btrfs_block_group_item
,
767 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree
, struct btrfs_block_group_item
,
769 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
770 struct btrfs_block_group_item
, chunk_objectid
, 64);
771 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd
,
772 struct btrfs_block_group_item
, chunk_objectid
, 64);
773 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
774 struct btrfs_block_group_item
, flags
, 64);
775 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
776 struct btrfs_block_group_item
, flags
, 64);
778 /* struct btrfs_inode_ref */
779 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
781 /* struct btrfs_inode_item */
782 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
783 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
784 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
785 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
786 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
787 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
788 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
789 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
790 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
791 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
792 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
795 static inline struct btrfs_timespec
*
796 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
798 unsigned long ptr
= (unsigned long)inode_item
;
799 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
800 return (struct btrfs_timespec
*)ptr
;
803 static inline struct btrfs_timespec
*
804 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
806 unsigned long ptr
= (unsigned long)inode_item
;
807 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
808 return (struct btrfs_timespec
*)ptr
;
811 static inline struct btrfs_timespec
*
812 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
814 unsigned long ptr
= (unsigned long)inode_item
;
815 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
816 return (struct btrfs_timespec
*)ptr
;
819 static inline struct btrfs_timespec
*
820 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
822 unsigned long ptr
= (unsigned long)inode_item
;
823 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
824 return (struct btrfs_timespec
*)ptr
;
827 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
828 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
830 /* struct btrfs_extent_item */
831 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
833 /* struct btrfs_dev_extent */
834 BTRFS_SETGET_FUNCS(dev_extent_owner
, struct btrfs_dev_extent
, owner
, 64);
835 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
837 /* struct btrfs_extent_ref */
838 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
839 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
840 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
841 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
843 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
844 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
846 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
848 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
850 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
853 /* struct btrfs_node */
854 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
855 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
857 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
860 ptr
= offsetof(struct btrfs_node
, ptrs
) +
861 sizeof(struct btrfs_key_ptr
) * nr
;
862 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
865 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
869 ptr
= offsetof(struct btrfs_node
, ptrs
) +
870 sizeof(struct btrfs_key_ptr
) * nr
;
871 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
874 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
877 ptr
= offsetof(struct btrfs_node
, ptrs
) +
878 sizeof(struct btrfs_key_ptr
) * nr
;
879 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
882 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
886 ptr
= offsetof(struct btrfs_node
, ptrs
) +
887 sizeof(struct btrfs_key_ptr
) * nr
;
888 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
891 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
893 return offsetof(struct btrfs_node
, ptrs
) +
894 sizeof(struct btrfs_key_ptr
) * nr
;
897 void btrfs_node_key(struct extent_buffer
*eb
,
898 struct btrfs_disk_key
*disk_key
, int nr
);
900 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
901 struct btrfs_disk_key
*disk_key
, int nr
)
904 ptr
= btrfs_node_key_ptr_offset(nr
);
905 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
906 struct btrfs_key_ptr
, key
, disk_key
);
909 /* struct btrfs_item */
910 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
911 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
913 static inline unsigned long btrfs_item_nr_offset(int nr
)
915 return offsetof(struct btrfs_leaf
, items
) +
916 sizeof(struct btrfs_item
) * nr
;
919 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
922 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
925 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
926 struct btrfs_item
*item
)
928 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
931 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
933 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
936 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
938 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
941 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
943 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
946 static inline void btrfs_item_key(struct extent_buffer
*eb
,
947 struct btrfs_disk_key
*disk_key
, int nr
)
949 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
950 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
953 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
954 struct btrfs_disk_key
*disk_key
, int nr
)
956 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
957 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
960 /* struct btrfs_dir_item */
961 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
962 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
963 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
965 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
966 struct btrfs_dir_item
*item
,
967 struct btrfs_disk_key
*key
)
969 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
972 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
973 struct btrfs_dir_item
*item
,
974 struct btrfs_disk_key
*key
)
976 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
979 /* struct btrfs_disk_key */
980 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
982 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
983 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
985 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
986 struct btrfs_disk_key
*disk
)
988 cpu
->offset
= le64_to_cpu(disk
->offset
);
989 cpu
->type
= disk
->type
;
990 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
993 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
994 struct btrfs_key
*cpu
)
996 disk
->offset
= cpu_to_le64(cpu
->offset
);
997 disk
->type
= cpu
->type
;
998 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1001 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1002 struct btrfs_key
*key
, int nr
)
1004 struct btrfs_disk_key disk_key
;
1005 btrfs_node_key(eb
, &disk_key
, nr
);
1006 btrfs_disk_key_to_cpu(key
, &disk_key
);
1009 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1010 struct btrfs_key
*key
, int nr
)
1012 struct btrfs_disk_key disk_key
;
1013 btrfs_item_key(eb
, &disk_key
, nr
);
1014 btrfs_disk_key_to_cpu(key
, &disk_key
);
1017 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1018 struct btrfs_dir_item
*item
,
1019 struct btrfs_key
*key
)
1021 struct btrfs_disk_key disk_key
;
1022 btrfs_dir_item_key(eb
, item
, &disk_key
);
1023 btrfs_disk_key_to_cpu(key
, &disk_key
);
1027 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1032 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1037 /* struct btrfs_header */
1038 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1039 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1041 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1042 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1043 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 16);
1044 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1046 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1048 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1052 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1054 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1058 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1060 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1064 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1069 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1074 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1079 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1081 return (btrfs_header_level(eb
) == 0);
1084 /* struct btrfs_root_item */
1085 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1086 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1087 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1089 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1090 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1091 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1092 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1093 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1094 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1095 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1097 /* struct btrfs_super_block */
1098 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1099 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1101 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1102 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1103 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1104 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1106 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1108 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1109 chunk_root_level
, 64);
1110 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1112 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1114 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1116 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1118 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1120 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1122 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1123 root_dir_objectid
, 64);
1124 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1127 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1129 return offsetof(struct btrfs_leaf
, items
);
1132 /* struct btrfs_file_extent_item */
1133 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1135 static inline unsigned long btrfs_file_extent_inline_start(struct
1136 btrfs_file_extent_item
*e
)
1138 unsigned long offset
= (unsigned long)e
;
1139 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1143 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1145 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1148 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1149 struct btrfs_item
*e
)
1151 unsigned long offset
;
1152 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1153 return btrfs_item_size(eb
, e
) - offset
;
1156 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1158 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1160 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1161 disk_num_bytes
, 64);
1162 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1164 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1167 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1169 return sb
->s_fs_info
;
1172 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1173 const char *name
, int len
)
1175 /* if we already have a name just free it */
1179 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1183 memcpy(root
->name
, name
, len
);
1184 root
->name
[len
] ='\0';
1189 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1191 return root
->leafsize
;
1192 return root
->nodesize
;
1195 /* helper function to cast into the data area of the leaf. */
1196 #define btrfs_item_ptr(leaf, slot, type) \
1197 ((type *)(btrfs_leaf_data(leaf) + \
1198 btrfs_item_offset_nr(leaf, slot)))
1200 #define btrfs_item_ptr_offset(leaf, slot) \
1201 ((unsigned long)(btrfs_leaf_data(leaf) + \
1202 btrfs_item_offset_nr(leaf, slot)))
1204 static inline struct dentry
*fdentry(struct file
*file
) {
1205 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1206 return file
->f_dentry
;
1208 return file
->f_path
.dentry
;
1213 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1214 struct btrfs_path
*count_path
,
1216 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1217 struct btrfs_root
*root
);
1218 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1219 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1220 btrfs_fs_info
*info
,
1222 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1223 struct btrfs_block_group_cache
1224 *hint
, u64 search_start
,
1225 int data
, int owner
);
1226 int btrfs_inc_root_ref(struct btrfs_trans_handle
*trans
,
1227 struct btrfs_root
*root
, u64 owner_objectid
);
1228 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1229 struct btrfs_root
*root
, u32 size
,
1231 u64 hint
, u64 empty_size
);
1232 struct extent_buffer
*__btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1233 struct btrfs_root
*root
,
1241 int btrfs_grow_extent_tree(struct btrfs_trans_handle
*trans
,
1242 struct btrfs_root
*root
, u64 new_size
);
1243 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1244 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1245 struct btrfs_root
*root
,
1246 struct btrfs_path
*path
, u64 bytenr
,
1247 u64 root_objectid
, u64 ref_generation
,
1248 u64 owner
, u64 owner_offset
);
1249 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1250 struct btrfs_root
*root
,
1251 u64 num_bytes
, u64 root_objectid
, u64 ref_generation
,
1252 u64 owner
, u64 owner_offset
,
1253 u64 empty_size
, u64 hint_byte
,
1254 u64 search_end
, struct btrfs_key
*ins
, int data
);
1255 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1256 struct extent_buffer
*buf
);
1257 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1258 *root
, u64 bytenr
, u64 num_bytes
,
1259 u64 root_objectid
, u64 ref_generation
,
1260 u64 owner_objectid
, u64 owner_offset
, int pin
);
1261 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1262 struct btrfs_root
*root
,
1263 struct extent_io_tree
*unpin
);
1264 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1265 struct btrfs_root
*root
,
1266 u64 bytenr
, u64 num_bytes
,
1267 u64 root_objectid
, u64 ref_generation
,
1268 u64 owner
, u64 owner_offset
);
1269 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1270 struct btrfs_root
*root
);
1271 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1272 int btrfs_read_block_groups(struct btrfs_root
*root
);
1273 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1274 struct btrfs_root
*root
, u64 bytes_used
,
1275 u64 type
, u64 chunk_tree
, u64 chunk_objectid
,
1278 int btrfs_previous_item(struct btrfs_root
*root
,
1279 struct btrfs_path
*path
, u64 min_objectid
,
1281 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1282 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1283 struct extent_buffer
*parent
, int parent_slot
,
1284 struct extent_buffer
**cow_ret
);
1285 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1286 struct btrfs_root
*root
,
1287 struct extent_buffer
*buf
,
1288 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1289 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1290 *root
, struct btrfs_path
*path
, u32 data_size
);
1291 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1292 struct btrfs_root
*root
,
1293 struct btrfs_path
*path
,
1294 u32 new_size
, int from_end
);
1295 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1296 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1298 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1299 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1300 int start_slot
, int cache_only
, u64
*last_ret
,
1301 struct btrfs_key
*progress
);
1302 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1303 struct btrfs_path
*btrfs_alloc_path(void);
1304 void btrfs_free_path(struct btrfs_path
*p
);
1305 void btrfs_init_path(struct btrfs_path
*p
);
1306 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1307 struct btrfs_path
*path
, int slot
, int nr
);
1309 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1310 struct btrfs_root
*root
,
1311 struct btrfs_path
*path
)
1313 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1316 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1317 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1318 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1319 struct btrfs_root
*root
,
1320 struct btrfs_path
*path
,
1321 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1323 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1324 struct btrfs_root
*root
,
1325 struct btrfs_path
*path
,
1326 struct btrfs_key
*key
,
1329 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1332 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1333 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1334 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1335 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1338 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1339 struct btrfs_key
*key
);
1340 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1341 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1343 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1344 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1346 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1347 btrfs_root_item
*item
, struct btrfs_key
*key
);
1348 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1349 struct btrfs_root
*latest_root
);
1351 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1352 *root
, const char *name
, int name_len
, u64 dir
,
1353 struct btrfs_key
*location
, u8 type
);
1354 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1355 struct btrfs_root
*root
,
1356 struct btrfs_path
*path
, u64 dir
,
1357 const char *name
, int name_len
,
1359 struct btrfs_dir_item
*
1360 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1361 struct btrfs_root
*root
,
1362 struct btrfs_path
*path
, u64 dir
,
1363 u64 objectid
, const char *name
, int name_len
,
1365 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1366 struct btrfs_path
*path
,
1367 const char *name
, int name_len
);
1368 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1369 struct btrfs_root
*root
,
1370 struct btrfs_path
*path
,
1371 struct btrfs_dir_item
*di
);
1372 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1373 struct btrfs_root
*root
, const char *name
,
1374 u16 name_len
, const void *data
, u16 data_len
,
1376 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1377 struct btrfs_root
*root
,
1378 struct btrfs_path
*path
, u64 dir
,
1379 const char *name
, u16 name_len
,
1382 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1383 struct btrfs_root
*fs_root
,
1384 u64 dirid
, u64
*objectid
);
1385 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1388 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1389 struct btrfs_root
*root
,
1390 const char *name
, int name_len
,
1391 u64 inode_objectid
, u64 ref_objectid
);
1392 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1393 struct btrfs_root
*root
,
1394 const char *name
, int name_len
,
1395 u64 inode_objectid
, u64 ref_objectid
);
1396 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1397 struct btrfs_root
*root
,
1398 struct btrfs_path
*path
, u64 objectid
);
1399 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1400 *root
, struct btrfs_path
*path
,
1401 struct btrfs_key
*location
, int mod
);
1404 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1405 struct btrfs_root
*root
,
1406 u64 objectid
, u64 pos
, u64 offset
,
1409 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1410 struct btrfs_root
*root
,
1411 struct btrfs_path
*path
, u64 objectid
,
1412 u64 bytenr
, int mod
);
1413 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1414 struct btrfs_root
*root
, struct inode
*inode
,
1416 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1417 struct btrfs_root
*root
,
1418 struct btrfs_path
*path
,
1419 u64 objectid
, u64 offset
,
1421 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1422 struct btrfs_root
*root
, struct btrfs_path
*path
,
1425 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1426 size_t size
, struct bio
*bio
);
1428 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1431 if (dec
<= inode
->i_blocks
)
1432 inode
->i_blocks
-= dec
;
1434 inode
->i_blocks
= 0;
1437 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1438 struct file_ra_state
*ra
, struct file
*file
,
1439 pgoff_t offset
, pgoff_t last_index
);
1440 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1442 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1443 int btrfs_readpage(struct file
*file
, struct page
*page
);
1444 void btrfs_delete_inode(struct inode
*inode
);
1445 void btrfs_put_inode(struct inode
*inode
);
1446 void btrfs_read_locked_inode(struct inode
*inode
);
1447 int btrfs_write_inode(struct inode
*inode
, int wait
);
1448 void btrfs_dirty_inode(struct inode
*inode
);
1449 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1450 void btrfs_destroy_inode(struct inode
*inode
);
1451 int btrfs_init_cachep(void);
1452 void btrfs_destroy_cachep(void);
1453 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1454 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1455 struct btrfs_root
*root
);
1456 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1458 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1459 unsigned from
, unsigned to
);
1460 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1461 size_t page_offset
, u64 start
, u64 end
,
1463 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1464 struct btrfs_root
*root
,
1465 struct inode
*inode
);
1467 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1468 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1469 extern struct file_operations btrfs_file_operations
;
1470 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1471 struct btrfs_root
*root
, struct inode
*inode
,
1472 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1474 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1475 struct btrfs_root
*root
, int cache_only
);
1478 int btrfs_init_sysfs(void);
1479 void btrfs_exit_sysfs(void);
1480 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1481 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1482 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1483 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1486 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1487 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1488 struct btrfs_root
*root
, struct inode
*inode
);
1490 u64
btrfs_parse_size(char *str
);