2 * Copyright (C) 2007 Oracle. All rights reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
19 #ifndef __BTRFS_CTREE__
20 #define __BTRFS_CTREE__
22 #include <linux/version.h>
24 #include <linux/highmem.h>
26 #include <linux/completion.h>
27 #include <linux/backing-dev.h>
28 #include <asm/kmap_types.h>
29 #include "bit-radix.h"
30 #include "extent_io.h"
31 #include "extent_map.h"
32 #include "async-thread.h"
34 struct btrfs_trans_handle
;
35 struct btrfs_transaction
;
36 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
37 extern struct kmem_cache
*btrfs_transaction_cachep
;
38 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
39 extern struct kmem_cache
*btrfs_path_cachep
;
41 #define BTRFS_MAGIC "_B5RfS_M"
43 #define BTRFS_MAX_LEVEL 8
45 /* holds pointers to all of the tree roots */
46 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
48 /* stores information about which extents are in use, and reference counts */
49 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
52 * chunk tree stores translations from logical -> physical block numbering
53 * the super block points to the chunk tree
55 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
58 * stores information about which areas of a given device are in use.
59 * one per device. The tree of tree roots points to the device tree
61 #define BTRFS_DEV_TREE_OBJECTID 4ULL
63 /* one per subvolume, storing files and directories */
64 #define BTRFS_FS_TREE_OBJECTID 5ULL
66 /* directory objectid inside the root tree */
67 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 * All files have objectids higher than this.
72 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
73 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
77 * the device items go into the chunk tree. The key is in the form
78 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
80 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
83 * we can actually store much bigger names, but lets not confuse the rest
86 #define BTRFS_NAME_LEN 255
88 /* 32 bytes in various csum fields */
89 #define BTRFS_CSUM_SIZE 32
90 /* four bytes for CRC32 */
91 #define BTRFS_CRC32_SIZE 4
92 #define BTRFS_EMPTY_DIR_SIZE 0
94 #define BTRFS_FT_UNKNOWN 0
95 #define BTRFS_FT_REG_FILE 1
96 #define BTRFS_FT_DIR 2
97 #define BTRFS_FT_CHRDEV 3
98 #define BTRFS_FT_BLKDEV 4
99 #define BTRFS_FT_FIFO 5
100 #define BTRFS_FT_SOCK 6
101 #define BTRFS_FT_SYMLINK 7
102 #define BTRFS_FT_XATTR 8
103 #define BTRFS_FT_MAX 9
106 * the key defines the order in the tree, and so it also defines (optimal)
107 * block layout. objectid corresonds to the inode number. The flags
108 * tells us things about the object, and is a kind of stream selector.
109 * so for a given inode, keys with flags of 1 might refer to the inode
110 * data, flags of 2 may point to file data in the btree and flags == 3
111 * may point to extents.
113 * offset is the starting byte offset for this key in the stream.
115 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
116 * in cpu native order. Otherwise they are identical and their sizes
117 * should be the same (ie both packed)
119 struct btrfs_disk_key
{
123 } __attribute__ ((__packed__
));
129 } __attribute__ ((__packed__
));
131 struct btrfs_mapping_tree
{
132 struct extent_map_tree map_tree
;
135 #define BTRFS_UUID_SIZE 16
136 struct btrfs_dev_item
{
137 /* the internal btrfs device id */
140 /* size of the device */
146 /* optimal io alignment for this device */
149 /* optimal io width for this device */
152 /* minimal io size for this device */
155 /* type and info about this device */
158 /* grouping information for allocation decisions */
161 /* seek speed 0-100 where 100 is fastest */
164 /* bandwidth 0-100 where 100 is fastest */
167 /* btrfs generated uuid for this device */
168 u8 uuid
[BTRFS_UUID_SIZE
];
169 } __attribute__ ((__packed__
));
171 struct btrfs_stripe
{
174 u8 dev_uuid
[BTRFS_UUID_SIZE
];
175 } __attribute__ ((__packed__
));
178 /* size of this chunk in bytes */
181 /* objectid of the root referencing this chunk */
187 /* optimal io alignment for this chunk */
190 /* optimal io width for this chunk */
193 /* minimal io size for this chunk */
196 /* 2^16 stripes is quite a lot, a second limit is the size of a single
201 /* sub stripes only matter for raid10 */
203 struct btrfs_stripe stripe
;
204 /* additional stripes go here */
205 } __attribute__ ((__packed__
));
207 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
209 BUG_ON(num_stripes
== 0);
210 return sizeof(struct btrfs_chunk
) +
211 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
214 #define BTRFS_FSID_SIZE 16
215 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
218 * every tree block (leaf or node) starts with this header.
220 struct btrfs_header
{
221 /* these first four must match the super block */
222 u8 csum
[BTRFS_CSUM_SIZE
];
223 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
224 __le64 bytenr
; /* which block this node is supposed to live in */
227 /* allowed to be different from the super from here on down */
228 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
233 } __attribute__ ((__packed__
));
235 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
236 sizeof(struct btrfs_header)) / \
237 sizeof(struct btrfs_key_ptr))
238 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
239 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
240 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
241 sizeof(struct btrfs_item) - \
242 sizeof(struct btrfs_file_extent_item))
246 * this is a very generous portion of the super block, giving us
247 * room to translate 14 chunks with 3 stripes each.
249 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
250 #define BTRFS_LABEL_SIZE 256
253 * the super block basically lists the main trees of the FS
254 * it currently lacks any block count etc etc
256 struct btrfs_super_block
{
257 u8 csum
[BTRFS_CSUM_SIZE
];
258 /* the first 4 fields must match struct btrfs_header */
259 u8 fsid
[16]; /* FS specific uuid */
260 __le64 bytenr
; /* this block number */
263 /* allowed to be different from the btrfs_header from here own down */
270 __le64 root_dir_objectid
;
276 __le32 sys_chunk_array_size
;
279 struct btrfs_dev_item dev_item
;
280 char label
[BTRFS_LABEL_SIZE
];
281 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
282 } __attribute__ ((__packed__
));
285 * A leaf is full of items. offset and size tell us where to find
286 * the item in the leaf (relative to the start of the data area)
289 struct btrfs_disk_key key
;
292 } __attribute__ ((__packed__
));
295 * leaves have an item area and a data area:
296 * [item0, item1....itemN] [free space] [dataN...data1, data0]
298 * The data is separate from the items to get the keys closer together
302 struct btrfs_header header
;
303 struct btrfs_item items
[];
304 } __attribute__ ((__packed__
));
307 * all non-leaf blocks are nodes, they hold only keys and pointers to
310 struct btrfs_key_ptr
{
311 struct btrfs_disk_key key
;
314 } __attribute__ ((__packed__
));
317 struct btrfs_header header
;
318 struct btrfs_key_ptr ptrs
[];
319 } __attribute__ ((__packed__
));
322 * btrfs_paths remember the path taken from the root down to the leaf.
323 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
324 * to any other levels that are present.
326 * The slots array records the index of the item or block pointer
327 * used while walking the tree.
330 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
331 int slots
[BTRFS_MAX_LEVEL
];
332 /* if there is real range locking, this locks field will change */
333 int locks
[BTRFS_MAX_LEVEL
];
335 /* keep some upper locks as we walk down */
342 * items in the extent btree are used to record the objectid of the
343 * owner of the block and the number of references
345 struct btrfs_extent_item
{
347 } __attribute__ ((__packed__
));
349 struct btrfs_extent_ref
{
354 } __attribute__ ((__packed__
));
356 /* dev extents record free space on individual devices. The owner
357 * field points back to the chunk allocation mapping tree that allocated
358 * the extent. The chunk tree uuid field is a way to double check the owner
360 struct btrfs_dev_extent
{
362 __le64 chunk_objectid
;
365 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
366 } __attribute__ ((__packed__
));
368 struct btrfs_inode_ref
{
371 } __attribute__ ((__packed__
));
373 struct btrfs_timespec
{
376 } __attribute__ ((__packed__
));
379 * there is no padding here on purpose. If you want to extent the inode,
380 * make a new item type
382 struct btrfs_inode_item
{
394 struct btrfs_timespec atime
;
395 struct btrfs_timespec ctime
;
396 struct btrfs_timespec mtime
;
397 struct btrfs_timespec otime
;
398 } __attribute__ ((__packed__
));
400 struct btrfs_dir_item
{
401 struct btrfs_disk_key location
;
405 } __attribute__ ((__packed__
));
407 struct btrfs_root_item
{
408 struct btrfs_inode_item inode
;
415 struct btrfs_disk_key drop_progress
;
418 } __attribute__ ((__packed__
));
420 #define BTRFS_FILE_EXTENT_REG 0
421 #define BTRFS_FILE_EXTENT_INLINE 1
423 struct btrfs_file_extent_item
{
427 * disk space consumed by the extent, checksum blocks are included
431 __le64 disk_num_bytes
;
433 * the logical offset in file blocks (no csums)
434 * this extent record is for. This allows a file extent to point
435 * into the middle of an existing extent on disk, sharing it
436 * between two snapshots (useful if some bytes in the middle of the
437 * extent have changed
441 * the logical number of file blocks (no csums included)
444 } __attribute__ ((__packed__
));
446 struct btrfs_csum_item
{
448 } __attribute__ ((__packed__
));
450 /* different types of block groups (and chunks) */
451 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
452 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
453 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
454 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
455 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
456 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
457 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
460 struct btrfs_block_group_item
{
462 __le64 chunk_objectid
;
464 } __attribute__ ((__packed__
));
466 struct btrfs_space_info
{
473 struct list_head list
;
476 struct btrfs_block_group_cache
{
477 struct btrfs_key key
;
478 struct btrfs_block_group_item item
;
479 struct btrfs_space_info
*space_info
;
487 struct btrfs_fs_devices
;
488 struct btrfs_fs_info
{
489 u8 fsid
[BTRFS_FSID_SIZE
];
490 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
491 struct btrfs_root
*extent_root
;
492 struct btrfs_root
*tree_root
;
493 struct btrfs_root
*chunk_root
;
494 struct btrfs_root
*dev_root
;
495 struct radix_tree_root fs_roots_radix
;
497 struct extent_io_tree free_space_cache
;
498 struct extent_io_tree block_group_cache
;
499 struct extent_io_tree pinned_extents
;
500 struct extent_io_tree pending_del
;
501 struct extent_io_tree extent_ins
;
503 /* logical->physical extent mapping */
504 struct btrfs_mapping_tree mapping_tree
;
507 u64 last_trans_committed
;
508 unsigned long mount_opt
;
512 struct btrfs_transaction
*running_transaction
;
513 struct btrfs_super_block super_copy
;
514 struct btrfs_super_block super_for_commit
;
515 struct block_device
*__bdev
;
516 struct super_block
*sb
;
517 struct inode
*btree_inode
;
518 struct backing_dev_info bdi
;
519 spinlock_t hash_lock
;
520 struct mutex trans_mutex
;
521 struct mutex transaction_kthread_mutex
;
522 struct mutex cleaner_mutex
;
523 struct mutex alloc_mutex
;
524 struct mutex chunk_mutex
;
525 struct mutex drop_mutex
;
526 struct list_head trans_list
;
527 struct list_head hashers
;
528 struct list_head dead_roots
;
529 atomic_t nr_async_submits
;
532 * there is a pool of worker threads for checksumming during writes
533 * and a pool for checksumming after reads. This is because readers
534 * can run with FS locks held, and the writers may be waiting for
535 * those locks. We don't want ordering in the pending list to cause
536 * deadlocks, and so the two are serviced separately.
538 * A third pool does submit_bio to avoid deadlocking with the other
541 struct btrfs_workers workers
;
542 struct btrfs_workers endio_workers
;
543 struct btrfs_workers submit_workers
;
544 struct task_struct
*transaction_kthread
;
545 struct task_struct
*cleaner_kthread
;
546 int thread_pool_size
;
548 struct kobject super_kobj
;
549 struct completion kobj_unregister
;
555 struct list_head dirty_cowonly_roots
;
557 struct btrfs_fs_devices
*fs_devices
;
558 struct list_head space_info
;
559 spinlock_t delalloc_lock
;
560 spinlock_t new_trans_lock
;
565 u64 avail_data_alloc_bits
;
566 u64 avail_metadata_alloc_bits
;
567 u64 avail_system_alloc_bits
;
568 u64 data_alloc_profile
;
569 u64 metadata_alloc_profile
;
570 u64 system_alloc_profile
;
576 * in ram representation of the tree. extent_root is used for all allocations
577 * and for the extent tree extent_root root.
580 struct extent_buffer
*node
;
582 /* the node lock is held while changing the node pointer */
583 spinlock_t node_lock
;
585 struct extent_buffer
*commit_root
;
586 struct btrfs_root_item root_item
;
587 struct btrfs_key root_key
;
588 struct btrfs_fs_info
*fs_info
;
590 struct kobject root_kobj
;
591 struct completion kobj_unregister
;
592 struct mutex objectid_mutex
;
596 /* data allocations are done in sectorsize units */
599 /* node allocations are done in nodesize units */
602 /* leaf allocations are done in leafsize units */
609 u64 last_inode_alloc
;
612 struct btrfs_key defrag_progress
;
613 struct btrfs_key defrag_max
;
619 /* the dirty list is only used by non-reference counted roots */
620 struct list_head dirty_list
;
625 * inode items have the data typically returned from stat and store other
626 * info about object characteristics. There is one for every file and dir in
629 #define BTRFS_INODE_ITEM_KEY 1
630 #define BTRFS_INODE_REF_KEY 2
631 #define BTRFS_XATTR_ITEM_KEY 8
632 /* reserve 2-15 close to the inode for later flexibility */
635 * dir items are the name -> inode pointers in a directory. There is one
636 * for every name in a directory.
638 #define BTRFS_DIR_ITEM_KEY 16
639 #define BTRFS_DIR_INDEX_KEY 17
641 * extent data is for file data
643 #define BTRFS_EXTENT_DATA_KEY 18
645 * csum items have the checksums for data in the extents
647 #define BTRFS_CSUM_ITEM_KEY 19
649 /* reserve 20-31 for other file stuff */
652 * root items point to tree roots. There are typically in the root
653 * tree used by the super block to find all the other trees
655 #define BTRFS_ROOT_ITEM_KEY 32
657 * extent items are in the extent map tree. These record which blocks
658 * are used, and how many references there are to each block
660 #define BTRFS_EXTENT_ITEM_KEY 33
661 #define BTRFS_EXTENT_REF_KEY 34
664 * block groups give us hints into the extent allocation trees. Which
665 * blocks are free etc etc
667 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
669 #define BTRFS_DEV_EXTENT_KEY 75
670 #define BTRFS_DEV_ITEM_KEY 76
671 #define BTRFS_CHUNK_ITEM_KEY 77
674 * string items are for debugging. They just store a short string of
677 #define BTRFS_STRING_ITEM_KEY 253
679 #define BTRFS_MOUNT_NODATASUM (1 << 0)
680 #define BTRFS_MOUNT_NODATACOW (1 << 1)
681 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
682 #define BTRFS_MOUNT_SSD (1 << 3)
683 #define BTRFS_MOUNT_DEGRADED (1 << 4)
685 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
686 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
687 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
692 #define BTRFS_INODE_NODATASUM (1 << 0)
693 #define BTRFS_INODE_NODATACOW (1 << 1)
694 #define BTRFS_INODE_READONLY (1 << 2)
695 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
697 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
699 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
701 /* some macros to generate set/get funcs for the struct fields. This
702 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
705 #define le8_to_cpu(v) (v)
706 #define cpu_to_le8(v) (v)
709 #define read_eb_member(eb, ptr, type, member, result) ( \
710 read_extent_buffer(eb, (char *)(result), \
711 ((unsigned long)(ptr)) + \
712 offsetof(type, member), \
713 sizeof(((type *)0)->member)))
715 #define write_eb_member(eb, ptr, type, member, result) ( \
716 write_extent_buffer(eb, (char *)(result), \
717 ((unsigned long)(ptr)) + \
718 offsetof(type, member), \
719 sizeof(((type *)0)->member)))
721 #ifndef BTRFS_SETGET_FUNCS
722 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
723 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
724 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
727 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
728 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
730 type *p = kmap_atomic(eb->first_page, KM_USER0); \
731 u##bits res = le##bits##_to_cpu(p->member); \
732 kunmap_atomic(p, KM_USER0); \
735 static inline void btrfs_set_##name(struct extent_buffer *eb, \
738 type *p = kmap_atomic(eb->first_page, KM_USER0); \
739 p->member = cpu_to_le##bits(val); \
740 kunmap_atomic(p, KM_USER0); \
743 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
744 static inline u##bits btrfs_##name(type *s) \
746 return le##bits##_to_cpu(s->member); \
748 static inline void btrfs_set_##name(type *s, u##bits val) \
750 s->member = cpu_to_le##bits(val); \
753 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
754 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
755 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
756 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
757 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
758 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
759 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
760 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
761 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
762 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
764 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
765 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
767 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
769 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
771 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
773 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
775 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
776 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
778 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
780 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
783 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
785 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
788 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
789 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
790 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
791 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
792 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
793 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
794 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
795 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
796 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
797 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
798 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
800 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
802 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
805 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
806 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
807 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
809 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
811 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
813 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
815 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
816 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
818 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
820 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
821 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
823 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
826 unsigned long offset
= (unsigned long)c
;
827 offset
+= offsetof(struct btrfs_chunk
, stripe
);
828 offset
+= nr
* sizeof(struct btrfs_stripe
);
829 return (struct btrfs_stripe
*)offset
;
832 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
834 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
837 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
838 struct btrfs_chunk
*c
, int nr
)
840 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
843 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
844 struct btrfs_chunk
*c
, int nr
,
847 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
850 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
851 struct btrfs_chunk
*c
, int nr
)
853 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
856 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
857 struct btrfs_chunk
*c
, int nr
,
860 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
863 /* struct btrfs_block_group_item */
864 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
866 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
868 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
869 struct btrfs_block_group_item
, chunk_objectid
, 64);
871 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
872 struct btrfs_block_group_item
, chunk_objectid
, 64);
873 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
874 struct btrfs_block_group_item
, flags
, 64);
875 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
876 struct btrfs_block_group_item
, flags
, 64);
878 /* struct btrfs_inode_ref */
879 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
881 /* struct btrfs_inode_item */
882 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
883 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
884 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
885 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
886 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
887 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
888 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
889 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
890 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
891 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
892 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
895 static inline struct btrfs_timespec
*
896 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
898 unsigned long ptr
= (unsigned long)inode_item
;
899 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
900 return (struct btrfs_timespec
*)ptr
;
903 static inline struct btrfs_timespec
*
904 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
906 unsigned long ptr
= (unsigned long)inode_item
;
907 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
908 return (struct btrfs_timespec
*)ptr
;
911 static inline struct btrfs_timespec
*
912 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
914 unsigned long ptr
= (unsigned long)inode_item
;
915 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
916 return (struct btrfs_timespec
*)ptr
;
919 static inline struct btrfs_timespec
*
920 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
922 unsigned long ptr
= (unsigned long)inode_item
;
923 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
924 return (struct btrfs_timespec
*)ptr
;
927 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
928 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
930 /* struct btrfs_extent_item */
931 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
933 /* struct btrfs_dev_extent */
934 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
936 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
938 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
940 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
942 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
944 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
945 return (u8
*)((unsigned long)dev
+ ptr
);
948 /* struct btrfs_extent_ref */
949 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
950 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
951 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
952 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
954 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
955 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
957 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
959 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
961 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
964 /* struct btrfs_node */
965 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
966 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
968 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
971 ptr
= offsetof(struct btrfs_node
, ptrs
) +
972 sizeof(struct btrfs_key_ptr
) * nr
;
973 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
976 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
980 ptr
= offsetof(struct btrfs_node
, ptrs
) +
981 sizeof(struct btrfs_key_ptr
) * nr
;
982 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
985 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
988 ptr
= offsetof(struct btrfs_node
, ptrs
) +
989 sizeof(struct btrfs_key_ptr
) * nr
;
990 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
993 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
997 ptr
= offsetof(struct btrfs_node
, ptrs
) +
998 sizeof(struct btrfs_key_ptr
) * nr
;
999 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1002 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1004 return offsetof(struct btrfs_node
, ptrs
) +
1005 sizeof(struct btrfs_key_ptr
) * nr
;
1008 void btrfs_node_key(struct extent_buffer
*eb
,
1009 struct btrfs_disk_key
*disk_key
, int nr
);
1011 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1012 struct btrfs_disk_key
*disk_key
, int nr
)
1015 ptr
= btrfs_node_key_ptr_offset(nr
);
1016 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1017 struct btrfs_key_ptr
, key
, disk_key
);
1020 /* struct btrfs_item */
1021 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1022 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1024 static inline unsigned long btrfs_item_nr_offset(int nr
)
1026 return offsetof(struct btrfs_leaf
, items
) +
1027 sizeof(struct btrfs_item
) * nr
;
1030 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1033 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1036 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1037 struct btrfs_item
*item
)
1039 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1042 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1044 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1047 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1049 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1052 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1054 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1057 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1058 struct btrfs_disk_key
*disk_key
, int nr
)
1060 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1061 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1064 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1065 struct btrfs_disk_key
*disk_key
, int nr
)
1067 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1068 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1071 /* struct btrfs_dir_item */
1072 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1073 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1074 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1076 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1077 struct btrfs_dir_item
*item
,
1078 struct btrfs_disk_key
*key
)
1080 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1083 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1084 struct btrfs_dir_item
*item
,
1085 struct btrfs_disk_key
*key
)
1087 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1090 /* struct btrfs_disk_key */
1091 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1093 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1094 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1096 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1097 struct btrfs_disk_key
*disk
)
1099 cpu
->offset
= le64_to_cpu(disk
->offset
);
1100 cpu
->type
= disk
->type
;
1101 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1104 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1105 struct btrfs_key
*cpu
)
1107 disk
->offset
= cpu_to_le64(cpu
->offset
);
1108 disk
->type
= cpu
->type
;
1109 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1112 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1113 struct btrfs_key
*key
, int nr
)
1115 struct btrfs_disk_key disk_key
;
1116 btrfs_node_key(eb
, &disk_key
, nr
);
1117 btrfs_disk_key_to_cpu(key
, &disk_key
);
1120 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1121 struct btrfs_key
*key
, int nr
)
1123 struct btrfs_disk_key disk_key
;
1124 btrfs_item_key(eb
, &disk_key
, nr
);
1125 btrfs_disk_key_to_cpu(key
, &disk_key
);
1128 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1129 struct btrfs_dir_item
*item
,
1130 struct btrfs_key
*key
)
1132 struct btrfs_disk_key disk_key
;
1133 btrfs_dir_item_key(eb
, item
, &disk_key
);
1134 btrfs_disk_key_to_cpu(key
, &disk_key
);
1138 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1143 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1148 /* struct btrfs_header */
1149 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1150 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1152 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1153 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1154 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1155 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1157 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1159 return (btrfs_header_flags(eb
) & flag
) == flag
;
1162 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1164 u64 flags
= btrfs_header_flags(eb
);
1165 btrfs_set_header_flags(eb
, flags
| flag
);
1166 return (flags
& flag
) == flag
;
1169 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1171 u64 flags
= btrfs_header_flags(eb
);
1172 btrfs_set_header_flags(eb
, flags
& ~flag
);
1173 return (flags
& flag
) == flag
;
1176 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1178 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1182 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1184 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1188 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1190 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1194 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1196 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1200 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1205 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1210 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1215 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1217 return (btrfs_header_level(eb
) == 0);
1220 /* struct btrfs_root_item */
1221 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1222 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1223 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1225 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1226 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1227 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1228 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1229 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1230 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1231 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1233 /* struct btrfs_super_block */
1234 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1235 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1236 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1238 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1239 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1240 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1241 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1243 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1245 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1246 chunk_root_level
, 64);
1247 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1249 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1251 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1253 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1255 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1257 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1259 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1260 root_dir_objectid
, 64);
1261 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1264 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1266 return offsetof(struct btrfs_leaf
, items
);
1269 /* struct btrfs_file_extent_item */
1270 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1272 static inline unsigned long btrfs_file_extent_inline_start(struct
1273 btrfs_file_extent_item
*e
)
1275 unsigned long offset
= (unsigned long)e
;
1276 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1280 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1282 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1285 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1286 struct btrfs_item
*e
)
1288 unsigned long offset
;
1289 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1290 return btrfs_item_size(eb
, e
) - offset
;
1293 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1295 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1297 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1298 disk_num_bytes
, 64);
1299 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1301 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1304 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1306 return sb
->s_fs_info
;
1309 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1310 const char *name
, int len
)
1312 /* if we already have a name just free it */
1316 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1320 memcpy(root
->name
, name
, len
);
1321 root
->name
[len
] ='\0';
1326 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1328 return root
->leafsize
;
1329 return root
->nodesize
;
1332 /* helper function to cast into the data area of the leaf. */
1333 #define btrfs_item_ptr(leaf, slot, type) \
1334 ((type *)(btrfs_leaf_data(leaf) + \
1335 btrfs_item_offset_nr(leaf, slot)))
1337 #define btrfs_item_ptr_offset(leaf, slot) \
1338 ((unsigned long)(btrfs_leaf_data(leaf) + \
1339 btrfs_item_offset_nr(leaf, slot)))
1341 static inline struct dentry
*fdentry(struct file
*file
) {
1342 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1343 return file
->f_dentry
;
1345 return file
->f_path
.dentry
;
1350 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1351 struct btrfs_path
*count_path
,
1352 u64 expected_owner
, u64 first_extent
);
1353 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1354 struct btrfs_root
*root
);
1355 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1356 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1357 btrfs_fs_info
*info
,
1359 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1360 struct btrfs_block_group_cache
1361 *hint
, u64 search_start
,
1362 int data
, int owner
);
1363 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1364 struct btrfs_root
*root
,
1372 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1373 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1374 struct btrfs_root
*root
,
1375 struct btrfs_path
*path
, u64 bytenr
,
1376 u64 root_objectid
, u64 ref_generation
,
1377 u64 owner
, u64 owner_offset
);
1378 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1379 struct btrfs_root
*root
,
1380 u64 num_bytes
, u64 min_bytes
,
1381 u64 root_objectid
, u64 ref_generation
,
1382 u64 owner
, u64 owner_offset
,
1383 u64 empty_size
, u64 hint_byte
,
1384 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1385 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1386 struct extent_buffer
*buf
);
1387 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1388 *root
, u64 bytenr
, u64 num_bytes
,
1389 u64 root_objectid
, u64 ref_generation
,
1390 u64 owner_objectid
, u64 owner_offset
, int pin
);
1391 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1392 struct btrfs_root
*root
,
1393 struct extent_io_tree
*unpin
);
1394 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1395 struct btrfs_root
*root
,
1396 u64 bytenr
, u64 num_bytes
,
1397 u64 root_objectid
, u64 ref_generation
,
1398 u64 owner
, u64 owner_offset
);
1399 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1400 struct btrfs_root
*root
);
1401 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1402 int btrfs_read_block_groups(struct btrfs_root
*root
);
1403 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1404 struct btrfs_root
*root
, u64 bytes_used
,
1405 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1408 int btrfs_previous_item(struct btrfs_root
*root
,
1409 struct btrfs_path
*path
, u64 min_objectid
,
1412 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1413 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1414 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1415 struct btrfs_key
*key
, int lowest_level
);
1417 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1418 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1419 struct extent_buffer
*parent
, int parent_slot
,
1420 struct extent_buffer
**cow_ret
);
1421 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1422 struct btrfs_root
*root
,
1423 struct extent_buffer
*buf
,
1424 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1425 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1426 *root
, struct btrfs_path
*path
, u32 data_size
);
1427 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1428 struct btrfs_root
*root
,
1429 struct btrfs_path
*path
,
1430 u32 new_size
, int from_end
);
1431 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1432 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1434 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1435 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1436 int start_slot
, int cache_only
, u64
*last_ret
,
1437 struct btrfs_key
*progress
);
1438 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1439 struct btrfs_path
*btrfs_alloc_path(void);
1440 void btrfs_free_path(struct btrfs_path
*p
);
1441 void btrfs_init_path(struct btrfs_path
*p
);
1442 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1443 struct btrfs_path
*path
, int slot
, int nr
);
1445 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1446 struct btrfs_root
*root
,
1447 struct btrfs_path
*path
)
1449 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1452 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1453 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1454 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1455 struct btrfs_root
*root
,
1456 struct btrfs_path
*path
,
1457 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1459 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1460 struct btrfs_root
*root
,
1461 struct btrfs_path
*path
,
1462 struct btrfs_key
*key
,
1465 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1468 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1469 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1470 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1471 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1474 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1475 struct btrfs_key
*key
);
1476 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1477 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1479 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1480 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1482 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1483 btrfs_root_item
*item
, struct btrfs_key
*key
);
1484 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1485 u64
*found_objectid
);
1486 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1487 struct btrfs_root
*latest_root
);
1489 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1490 *root
, const char *name
, int name_len
, u64 dir
,
1491 struct btrfs_key
*location
, u8 type
);
1492 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1493 struct btrfs_root
*root
,
1494 struct btrfs_path
*path
, u64 dir
,
1495 const char *name
, int name_len
,
1497 struct btrfs_dir_item
*
1498 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1499 struct btrfs_root
*root
,
1500 struct btrfs_path
*path
, u64 dir
,
1501 u64 objectid
, const char *name
, int name_len
,
1503 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1504 struct btrfs_path
*path
,
1505 const char *name
, int name_len
);
1506 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1507 struct btrfs_root
*root
,
1508 struct btrfs_path
*path
,
1509 struct btrfs_dir_item
*di
);
1510 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1511 struct btrfs_root
*root
, const char *name
,
1512 u16 name_len
, const void *data
, u16 data_len
,
1514 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1515 struct btrfs_root
*root
,
1516 struct btrfs_path
*path
, u64 dir
,
1517 const char *name
, u16 name_len
,
1520 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1521 struct btrfs_root
*fs_root
,
1522 u64 dirid
, u64
*objectid
);
1523 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1526 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1527 struct btrfs_root
*root
,
1528 const char *name
, int name_len
,
1529 u64 inode_objectid
, u64 ref_objectid
);
1530 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1531 struct btrfs_root
*root
,
1532 const char *name
, int name_len
,
1533 u64 inode_objectid
, u64 ref_objectid
);
1534 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1535 struct btrfs_root
*root
,
1536 struct btrfs_path
*path
, u64 objectid
);
1537 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1538 *root
, struct btrfs_path
*path
,
1539 struct btrfs_key
*location
, int mod
);
1542 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1543 struct btrfs_root
*root
,
1544 u64 objectid
, u64 pos
, u64 disk_offset
,
1546 u64 num_bytes
, u64 offset
);
1547 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1548 struct btrfs_root
*root
,
1549 struct btrfs_path
*path
, u64 objectid
,
1550 u64 bytenr
, int mod
);
1551 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1552 struct btrfs_root
*root
, struct inode
*inode
,
1553 struct bio
*bio
, char *sums
);
1554 int btrfs_csum_one_bio(struct btrfs_root
*root
,
1555 struct bio
*bio
, char **sums_ret
);
1556 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1557 struct btrfs_root
*root
,
1558 struct btrfs_path
*path
,
1559 u64 objectid
, u64 offset
,
1561 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1562 struct btrfs_root
*root
, struct btrfs_path
*path
,
1565 int btrfs_create_subvol_root(struct btrfs_root
*new_root
,
1566 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1567 struct btrfs_block_group_cache
*block_group
);
1569 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1572 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1573 size_t size
, struct bio
*bio
);
1575 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1578 if (dec
<= inode
->i_blocks
)
1579 inode
->i_blocks
-= dec
;
1581 inode
->i_blocks
= 0;
1584 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1585 struct file_ra_state
*ra
, struct file
*file
,
1586 pgoff_t offset
, pgoff_t last_index
);
1587 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1589 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1590 int btrfs_readpage(struct file
*file
, struct page
*page
);
1591 void btrfs_delete_inode(struct inode
*inode
);
1592 void btrfs_put_inode(struct inode
*inode
);
1593 void btrfs_read_locked_inode(struct inode
*inode
);
1594 int btrfs_write_inode(struct inode
*inode
, int wait
);
1595 void btrfs_dirty_inode(struct inode
*inode
);
1596 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1597 void btrfs_destroy_inode(struct inode
*inode
);
1598 int btrfs_init_cachep(void);
1599 void btrfs_destroy_cachep(void);
1600 long btrfs_ioctl_trans_end(struct file
*file
);
1601 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1602 struct btrfs_root
*root
);
1603 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1605 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1606 unsigned from
, unsigned to
);
1607 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1608 size_t page_offset
, u64 start
, u64 end
,
1610 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1611 struct btrfs_root
*root
,
1612 struct inode
*inode
);
1615 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1618 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1619 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1620 extern struct file_operations btrfs_file_operations
;
1621 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1622 struct btrfs_root
*root
, struct inode
*inode
,
1623 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1624 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1627 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
, int cache_only
);
1631 int btrfs_init_sysfs(void);
1632 void btrfs_exit_sysfs(void);
1633 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1634 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1635 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1636 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1639 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1640 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1641 struct btrfs_root
*root
, struct inode
*inode
);
1643 u64
btrfs_parse_size(char *str
);
1644 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1645 int btrfs_sync_fs(struct super_block
*sb
, int wait
);