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 <linux/wait.h>
29 #include <asm/kmap_types.h>
30 #include "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle
;
36 struct btrfs_transaction
;
37 extern struct kmem_cache
*btrfs_trans_handle_cachep
;
38 extern struct kmem_cache
*btrfs_transaction_cachep
;
39 extern struct kmem_cache
*btrfs_bit_radix_cachep
;
40 extern struct kmem_cache
*btrfs_path_cachep
;
41 struct btrfs_ordered_sum
;
43 #define BTRFS_MAGIC "_B5RfS_M"
46 # define BTRFS_MAX_LEVEL 7
48 # define BTRFS_MAX_LEVEL 8
51 /* holds pointers to all of the tree roots */
52 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
54 /* stores information about which extents are in use, and reference counts */
55 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
58 * chunk tree stores translations from logical -> physical block numbering
59 * the super block points to the chunk tree
61 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
64 * stores information about which areas of a given device are in use.
65 * one per device. The tree of tree roots points to the device tree
67 #define BTRFS_DEV_TREE_OBJECTID 4ULL
69 /* one per subvolume, storing files and directories */
70 #define BTRFS_FS_TREE_OBJECTID 5ULL
72 /* directory objectid inside the root tree */
73 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 * All files have objectids higher than this.
78 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
79 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
83 * the device items go into the chunk tree. The key is in the form
84 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
86 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
89 * we can actually store much bigger names, but lets not confuse the rest
92 #define BTRFS_NAME_LEN 255
94 /* 32 bytes in various csum fields */
95 #define BTRFS_CSUM_SIZE 32
96 /* four bytes for CRC32 */
97 #define BTRFS_CRC32_SIZE 4
98 #define BTRFS_EMPTY_DIR_SIZE 0
100 #define BTRFS_FT_UNKNOWN 0
101 #define BTRFS_FT_REG_FILE 1
102 #define BTRFS_FT_DIR 2
103 #define BTRFS_FT_CHRDEV 3
104 #define BTRFS_FT_BLKDEV 4
105 #define BTRFS_FT_FIFO 5
106 #define BTRFS_FT_SOCK 6
107 #define BTRFS_FT_SYMLINK 7
108 #define BTRFS_FT_XATTR 8
109 #define BTRFS_FT_MAX 9
112 * the key defines the order in the tree, and so it also defines (optimal)
113 * block layout. objectid corresonds to the inode number. The flags
114 * tells us things about the object, and is a kind of stream selector.
115 * so for a given inode, keys with flags of 1 might refer to the inode
116 * data, flags of 2 may point to file data in the btree and flags == 3
117 * may point to extents.
119 * offset is the starting byte offset for this key in the stream.
121 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
122 * in cpu native order. Otherwise they are identical and their sizes
123 * should be the same (ie both packed)
125 struct btrfs_disk_key
{
129 } __attribute__ ((__packed__
));
135 } __attribute__ ((__packed__
));
137 struct btrfs_mapping_tree
{
138 struct extent_map_tree map_tree
;
141 #define BTRFS_UUID_SIZE 16
142 struct btrfs_dev_item
{
143 /* the internal btrfs device id */
146 /* size of the device */
152 /* optimal io alignment for this device */
155 /* optimal io width for this device */
158 /* minimal io size for this device */
161 /* type and info about this device */
164 /* grouping information for allocation decisions */
167 /* seek speed 0-100 where 100 is fastest */
170 /* bandwidth 0-100 where 100 is fastest */
173 /* btrfs generated uuid for this device */
174 u8 uuid
[BTRFS_UUID_SIZE
];
175 } __attribute__ ((__packed__
));
177 struct btrfs_stripe
{
180 u8 dev_uuid
[BTRFS_UUID_SIZE
];
181 } __attribute__ ((__packed__
));
184 /* size of this chunk in bytes */
187 /* objectid of the root referencing this chunk */
193 /* optimal io alignment for this chunk */
196 /* optimal io width for this chunk */
199 /* minimal io size for this chunk */
202 /* 2^16 stripes is quite a lot, a second limit is the size of a single
207 /* sub stripes only matter for raid10 */
209 struct btrfs_stripe stripe
;
210 /* additional stripes go here */
211 } __attribute__ ((__packed__
));
213 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
215 BUG_ON(num_stripes
== 0);
216 return sizeof(struct btrfs_chunk
) +
217 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
220 #define BTRFS_FSID_SIZE 16
221 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
224 * every tree block (leaf or node) starts with this header.
226 struct btrfs_header
{
227 /* these first four must match the super block */
228 u8 csum
[BTRFS_CSUM_SIZE
];
229 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
230 __le64 bytenr
; /* which block this node is supposed to live in */
233 /* allowed to be different from the super from here on down */
234 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
239 } __attribute__ ((__packed__
));
241 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
242 sizeof(struct btrfs_header)) / \
243 sizeof(struct btrfs_key_ptr))
244 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
245 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
246 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
247 sizeof(struct btrfs_item) - \
248 sizeof(struct btrfs_file_extent_item))
252 * this is a very generous portion of the super block, giving us
253 * room to translate 14 chunks with 3 stripes each.
255 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
256 #define BTRFS_LABEL_SIZE 256
259 * the super block basically lists the main trees of the FS
260 * it currently lacks any block count etc etc
262 struct btrfs_super_block
{
263 u8 csum
[BTRFS_CSUM_SIZE
];
264 /* the first 4 fields must match struct btrfs_header */
265 u8 fsid
[16]; /* FS specific uuid */
266 __le64 bytenr
; /* this block number */
269 /* allowed to be different from the btrfs_header from here own down */
276 __le64 root_dir_objectid
;
282 __le32 sys_chunk_array_size
;
285 struct btrfs_dev_item dev_item
;
286 char label
[BTRFS_LABEL_SIZE
];
287 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
288 } __attribute__ ((__packed__
));
291 * A leaf is full of items. offset and size tell us where to find
292 * the item in the leaf (relative to the start of the data area)
295 struct btrfs_disk_key key
;
298 } __attribute__ ((__packed__
));
301 * leaves have an item area and a data area:
302 * [item0, item1....itemN] [free space] [dataN...data1, data0]
304 * The data is separate from the items to get the keys closer together
308 struct btrfs_header header
;
309 struct btrfs_item items
[];
310 } __attribute__ ((__packed__
));
313 * all non-leaf blocks are nodes, they hold only keys and pointers to
316 struct btrfs_key_ptr
{
317 struct btrfs_disk_key key
;
320 } __attribute__ ((__packed__
));
323 struct btrfs_header header
;
324 struct btrfs_key_ptr ptrs
[];
325 } __attribute__ ((__packed__
));
328 * btrfs_paths remember the path taken from the root down to the leaf.
329 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
330 * to any other levels that are present.
332 * The slots array records the index of the item or block pointer
333 * used while walking the tree.
336 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
337 int slots
[BTRFS_MAX_LEVEL
];
338 /* if there is real range locking, this locks field will change */
339 int locks
[BTRFS_MAX_LEVEL
];
341 /* keep some upper locks as we walk down */
348 * items in the extent btree are used to record the objectid of the
349 * owner of the block and the number of references
351 struct btrfs_extent_item
{
353 } __attribute__ ((__packed__
));
355 struct btrfs_extent_ref
{
360 } __attribute__ ((__packed__
));
362 /* dev extents record free space on individual devices. The owner
363 * field points back to the chunk allocation mapping tree that allocated
364 * the extent. The chunk tree uuid field is a way to double check the owner
366 struct btrfs_dev_extent
{
368 __le64 chunk_objectid
;
371 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
372 } __attribute__ ((__packed__
));
374 struct btrfs_inode_ref
{
377 } __attribute__ ((__packed__
));
379 struct btrfs_timespec
{
382 } __attribute__ ((__packed__
));
385 * there is no padding here on purpose. If you want to extent the inode,
386 * make a new item type
388 struct btrfs_inode_item
{
400 struct btrfs_timespec atime
;
401 struct btrfs_timespec ctime
;
402 struct btrfs_timespec mtime
;
403 struct btrfs_timespec otime
;
404 } __attribute__ ((__packed__
));
406 struct btrfs_dir_item
{
407 struct btrfs_disk_key location
;
411 } __attribute__ ((__packed__
));
413 struct btrfs_root_item
{
414 struct btrfs_inode_item inode
;
421 struct btrfs_disk_key drop_progress
;
424 } __attribute__ ((__packed__
));
426 #define BTRFS_FILE_EXTENT_REG 0
427 #define BTRFS_FILE_EXTENT_INLINE 1
429 struct btrfs_file_extent_item
{
433 * disk space consumed by the extent, checksum blocks are included
437 __le64 disk_num_bytes
;
439 * the logical offset in file blocks (no csums)
440 * this extent record is for. This allows a file extent to point
441 * into the middle of an existing extent on disk, sharing it
442 * between two snapshots (useful if some bytes in the middle of the
443 * extent have changed
447 * the logical number of file blocks (no csums included)
450 } __attribute__ ((__packed__
));
452 struct btrfs_csum_item
{
454 } __attribute__ ((__packed__
));
456 /* different types of block groups (and chunks) */
457 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
458 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
459 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
460 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
461 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
462 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
463 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
466 struct btrfs_block_group_item
{
468 __le64 chunk_objectid
;
470 } __attribute__ ((__packed__
));
472 struct btrfs_space_info
{
479 struct list_head list
;
482 struct btrfs_block_group_cache
{
483 struct btrfs_key key
;
484 struct btrfs_block_group_item item
;
485 struct btrfs_space_info
*space_info
;
494 struct btrfs_fs_devices
;
495 struct btrfs_fs_info
{
496 u8 fsid
[BTRFS_FSID_SIZE
];
497 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
498 struct btrfs_root
*extent_root
;
499 struct btrfs_root
*tree_root
;
500 struct btrfs_root
*chunk_root
;
501 struct btrfs_root
*dev_root
;
502 struct radix_tree_root fs_roots_radix
;
504 struct extent_io_tree free_space_cache
;
505 struct extent_io_tree block_group_cache
;
506 struct extent_io_tree pinned_extents
;
507 struct extent_io_tree pending_del
;
508 struct extent_io_tree extent_ins
;
510 /* logical->physical extent mapping */
511 struct btrfs_mapping_tree mapping_tree
;
514 u64 last_trans_committed
;
515 unsigned long mount_opt
;
519 struct btrfs_transaction
*running_transaction
;
520 wait_queue_head_t transaction_throttle
;
521 wait_queue_head_t transaction_wait
;
522 struct btrfs_super_block super_copy
;
523 struct btrfs_super_block super_for_commit
;
524 struct block_device
*__bdev
;
525 struct super_block
*sb
;
526 struct inode
*btree_inode
;
527 struct backing_dev_info bdi
;
528 spinlock_t hash_lock
;
529 struct mutex trans_mutex
;
530 struct mutex transaction_kthread_mutex
;
531 struct mutex cleaner_mutex
;
532 struct mutex alloc_mutex
;
533 struct mutex chunk_mutex
;
534 struct mutex drop_mutex
;
535 struct mutex volume_mutex
;
536 struct list_head trans_list
;
537 struct list_head hashers
;
538 struct list_head dead_roots
;
539 atomic_t nr_async_submits
;
542 * there is a pool of worker threads for checksumming during writes
543 * and a pool for checksumming after reads. This is because readers
544 * can run with FS locks held, and the writers may be waiting for
545 * those locks. We don't want ordering in the pending list to cause
546 * deadlocks, and so the two are serviced separately.
548 * A third pool does submit_bio to avoid deadlocking with the other
551 struct btrfs_workers workers
;
552 struct btrfs_workers endio_workers
;
553 struct btrfs_workers endio_write_workers
;
554 struct btrfs_workers submit_workers
;
556 * fixup workers take dirty pages that didn't properly go through
557 * the cow mechanism and make them safe to write. It happens
558 * for the sys_munmap function call path
560 struct btrfs_workers fixup_workers
;
561 struct task_struct
*transaction_kthread
;
562 struct task_struct
*cleaner_kthread
;
563 int thread_pool_size
;
565 struct kobject super_kobj
;
566 struct completion kobj_unregister
;
572 struct list_head dirty_cowonly_roots
;
574 struct btrfs_fs_devices
*fs_devices
;
575 struct list_head space_info
;
576 spinlock_t delalloc_lock
;
577 spinlock_t new_trans_lock
;
582 u64 avail_data_alloc_bits
;
583 u64 avail_metadata_alloc_bits
;
584 u64 avail_system_alloc_bits
;
585 u64 data_alloc_profile
;
586 u64 metadata_alloc_profile
;
587 u64 system_alloc_profile
;
593 * in ram representation of the tree. extent_root is used for all allocations
594 * and for the extent tree extent_root root.
597 struct extent_buffer
*node
;
599 /* the node lock is held while changing the node pointer */
600 spinlock_t node_lock
;
602 struct extent_buffer
*commit_root
;
603 struct btrfs_root_item root_item
;
604 struct btrfs_key root_key
;
605 struct btrfs_fs_info
*fs_info
;
607 struct kobject root_kobj
;
608 struct completion kobj_unregister
;
609 struct mutex objectid_mutex
;
613 /* data allocations are done in sectorsize units */
616 /* node allocations are done in nodesize units */
619 /* leaf allocations are done in leafsize units */
626 u64 last_inode_alloc
;
629 u64 defrag_trans_start
;
630 struct btrfs_key defrag_progress
;
631 struct btrfs_key defrag_max
;
637 /* the dirty list is only used by non-reference counted roots */
638 struct list_head dirty_list
;
643 * inode items have the data typically returned from stat and store other
644 * info about object characteristics. There is one for every file and dir in
647 #define BTRFS_INODE_ITEM_KEY 1
648 #define BTRFS_INODE_REF_KEY 2
649 #define BTRFS_XATTR_ITEM_KEY 8
650 /* reserve 2-15 close to the inode for later flexibility */
653 * dir items are the name -> inode pointers in a directory. There is one
654 * for every name in a directory.
656 #define BTRFS_DIR_ITEM_KEY 16
657 #define BTRFS_DIR_INDEX_KEY 17
659 * extent data is for file data
661 #define BTRFS_EXTENT_DATA_KEY 18
663 * csum items have the checksums for data in the extents
665 #define BTRFS_CSUM_ITEM_KEY 19
667 /* reserve 20-31 for other file stuff */
670 * root items point to tree roots. There are typically in the root
671 * tree used by the super block to find all the other trees
673 #define BTRFS_ROOT_ITEM_KEY 32
675 * extent items are in the extent map tree. These record which blocks
676 * are used, and how many references there are to each block
678 #define BTRFS_EXTENT_ITEM_KEY 33
679 #define BTRFS_EXTENT_REF_KEY 34
682 * block groups give us hints into the extent allocation trees. Which
683 * blocks are free etc etc
685 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
687 #define BTRFS_DEV_EXTENT_KEY 75
688 #define BTRFS_DEV_ITEM_KEY 76
689 #define BTRFS_CHUNK_ITEM_KEY 77
692 * string items are for debugging. They just store a short string of
695 #define BTRFS_STRING_ITEM_KEY 253
697 #define BTRFS_MOUNT_NODATASUM (1 << 0)
698 #define BTRFS_MOUNT_NODATACOW (1 << 1)
699 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
700 #define BTRFS_MOUNT_SSD (1 << 3)
701 #define BTRFS_MOUNT_DEGRADED (1 << 4)
703 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
704 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
705 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
710 #define BTRFS_INODE_NODATASUM (1 << 0)
711 #define BTRFS_INODE_NODATACOW (1 << 1)
712 #define BTRFS_INODE_READONLY (1 << 2)
713 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
715 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
717 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
719 /* some macros to generate set/get funcs for the struct fields. This
720 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
723 #define le8_to_cpu(v) (v)
724 #define cpu_to_le8(v) (v)
727 #define read_eb_member(eb, ptr, type, member, result) ( \
728 read_extent_buffer(eb, (char *)(result), \
729 ((unsigned long)(ptr)) + \
730 offsetof(type, member), \
731 sizeof(((type *)0)->member)))
733 #define write_eb_member(eb, ptr, type, member, result) ( \
734 write_extent_buffer(eb, (char *)(result), \
735 ((unsigned long)(ptr)) + \
736 offsetof(type, member), \
737 sizeof(((type *)0)->member)))
739 #ifndef BTRFS_SETGET_FUNCS
740 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
741 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
742 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
745 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
746 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
748 type *p = kmap_atomic(eb->first_page, KM_USER0); \
749 u##bits res = le##bits##_to_cpu(p->member); \
750 kunmap_atomic(p, KM_USER0); \
753 static inline void btrfs_set_##name(struct extent_buffer *eb, \
756 type *p = kmap_atomic(eb->first_page, KM_USER0); \
757 p->member = cpu_to_le##bits(val); \
758 kunmap_atomic(p, KM_USER0); \
761 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
762 static inline u##bits btrfs_##name(type *s) \
764 return le##bits##_to_cpu(s->member); \
766 static inline void btrfs_set_##name(type *s, u##bits val) \
768 s->member = cpu_to_le##bits(val); \
771 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
772 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
773 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
774 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
775 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
776 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
777 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
778 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
779 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
780 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
782 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
783 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
785 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
787 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
789 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
791 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
793 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
794 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
796 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
798 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
801 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
803 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
806 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
807 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
808 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
809 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
810 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
811 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
812 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
813 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
814 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
815 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
816 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
818 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
820 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
823 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
824 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
825 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
827 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
829 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
831 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
833 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
834 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
836 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
838 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
839 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
841 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
844 unsigned long offset
= (unsigned long)c
;
845 offset
+= offsetof(struct btrfs_chunk
, stripe
);
846 offset
+= nr
* sizeof(struct btrfs_stripe
);
847 return (struct btrfs_stripe
*)offset
;
850 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
852 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
855 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
856 struct btrfs_chunk
*c
, int nr
)
858 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
861 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
862 struct btrfs_chunk
*c
, int nr
,
865 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
868 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
869 struct btrfs_chunk
*c
, int nr
)
871 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
874 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
875 struct btrfs_chunk
*c
, int nr
,
878 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
881 /* struct btrfs_block_group_item */
882 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
884 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
886 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
887 struct btrfs_block_group_item
, chunk_objectid
, 64);
889 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
890 struct btrfs_block_group_item
, chunk_objectid
, 64);
891 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
892 struct btrfs_block_group_item
, flags
, 64);
893 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
894 struct btrfs_block_group_item
, flags
, 64);
896 /* struct btrfs_inode_ref */
897 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
899 /* struct btrfs_inode_item */
900 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
901 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
902 BTRFS_SETGET_FUNCS(inode_nblocks
, struct btrfs_inode_item
, nblocks
, 64);
903 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
904 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
905 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
906 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
907 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
908 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
909 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
910 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
913 static inline struct btrfs_timespec
*
914 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
916 unsigned long ptr
= (unsigned long)inode_item
;
917 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
918 return (struct btrfs_timespec
*)ptr
;
921 static inline struct btrfs_timespec
*
922 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
924 unsigned long ptr
= (unsigned long)inode_item
;
925 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
926 return (struct btrfs_timespec
*)ptr
;
929 static inline struct btrfs_timespec
*
930 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
932 unsigned long ptr
= (unsigned long)inode_item
;
933 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
934 return (struct btrfs_timespec
*)ptr
;
937 static inline struct btrfs_timespec
*
938 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
940 unsigned long ptr
= (unsigned long)inode_item
;
941 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
942 return (struct btrfs_timespec
*)ptr
;
945 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
946 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
948 /* struct btrfs_extent_item */
949 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
951 /* struct btrfs_dev_extent */
952 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
954 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
956 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
958 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
960 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
962 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
963 return (u8
*)((unsigned long)dev
+ ptr
);
966 /* struct btrfs_extent_ref */
967 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
968 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
969 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
970 BTRFS_SETGET_FUNCS(ref_offset
, struct btrfs_extent_ref
, offset
, 64);
972 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
973 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
975 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
977 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset
, struct btrfs_extent_ref
, offset
, 64);
979 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
982 /* struct btrfs_node */
983 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
984 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
986 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
989 ptr
= offsetof(struct btrfs_node
, ptrs
) +
990 sizeof(struct btrfs_key_ptr
) * nr
;
991 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
994 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
998 ptr
= offsetof(struct btrfs_node
, ptrs
) +
999 sizeof(struct btrfs_key_ptr
) * nr
;
1000 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1003 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1006 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1007 sizeof(struct btrfs_key_ptr
) * nr
;
1008 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1011 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1015 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1016 sizeof(struct btrfs_key_ptr
) * nr
;
1017 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1020 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1022 return offsetof(struct btrfs_node
, ptrs
) +
1023 sizeof(struct btrfs_key_ptr
) * nr
;
1026 void btrfs_node_key(struct extent_buffer
*eb
,
1027 struct btrfs_disk_key
*disk_key
, int nr
);
1029 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1030 struct btrfs_disk_key
*disk_key
, int nr
)
1033 ptr
= btrfs_node_key_ptr_offset(nr
);
1034 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1035 struct btrfs_key_ptr
, key
, disk_key
);
1038 /* struct btrfs_item */
1039 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1040 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1042 static inline unsigned long btrfs_item_nr_offset(int nr
)
1044 return offsetof(struct btrfs_leaf
, items
) +
1045 sizeof(struct btrfs_item
) * nr
;
1048 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1051 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1054 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1055 struct btrfs_item
*item
)
1057 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1060 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1062 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1065 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1067 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1070 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1072 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1075 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1076 struct btrfs_disk_key
*disk_key
, int nr
)
1078 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1079 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1082 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1083 struct btrfs_disk_key
*disk_key
, int nr
)
1085 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1086 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1089 /* struct btrfs_dir_item */
1090 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1091 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1092 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1094 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1095 struct btrfs_dir_item
*item
,
1096 struct btrfs_disk_key
*key
)
1098 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1101 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1102 struct btrfs_dir_item
*item
,
1103 struct btrfs_disk_key
*key
)
1105 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1108 /* struct btrfs_disk_key */
1109 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1111 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1112 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1114 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1115 struct btrfs_disk_key
*disk
)
1117 cpu
->offset
= le64_to_cpu(disk
->offset
);
1118 cpu
->type
= disk
->type
;
1119 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1122 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1123 struct btrfs_key
*cpu
)
1125 disk
->offset
= cpu_to_le64(cpu
->offset
);
1126 disk
->type
= cpu
->type
;
1127 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1130 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1131 struct btrfs_key
*key
, int nr
)
1133 struct btrfs_disk_key disk_key
;
1134 btrfs_node_key(eb
, &disk_key
, nr
);
1135 btrfs_disk_key_to_cpu(key
, &disk_key
);
1138 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1139 struct btrfs_key
*key
, int nr
)
1141 struct btrfs_disk_key disk_key
;
1142 btrfs_item_key(eb
, &disk_key
, nr
);
1143 btrfs_disk_key_to_cpu(key
, &disk_key
);
1146 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1147 struct btrfs_dir_item
*item
,
1148 struct btrfs_key
*key
)
1150 struct btrfs_disk_key disk_key
;
1151 btrfs_dir_item_key(eb
, item
, &disk_key
);
1152 btrfs_disk_key_to_cpu(key
, &disk_key
);
1156 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1161 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1166 /* struct btrfs_header */
1167 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1168 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1170 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1171 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1172 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1173 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1175 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1177 return (btrfs_header_flags(eb
) & flag
) == flag
;
1180 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1182 u64 flags
= btrfs_header_flags(eb
);
1183 btrfs_set_header_flags(eb
, flags
| flag
);
1184 return (flags
& flag
) == flag
;
1187 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1189 u64 flags
= btrfs_header_flags(eb
);
1190 btrfs_set_header_flags(eb
, flags
& ~flag
);
1191 return (flags
& flag
) == flag
;
1194 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1196 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1200 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1202 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1206 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1208 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1212 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1214 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1218 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1223 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1228 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1233 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1235 return (btrfs_header_level(eb
) == 0);
1238 /* struct btrfs_root_item */
1239 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1240 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1241 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1243 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1244 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1245 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1246 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1247 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1248 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1249 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1251 /* struct btrfs_super_block */
1252 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1253 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1254 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1256 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1257 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1258 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1259 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1261 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1263 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1264 chunk_root_level
, 64);
1265 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1267 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1269 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1271 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1273 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1275 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1277 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1278 root_dir_objectid
, 64);
1279 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1282 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1284 return offsetof(struct btrfs_leaf
, items
);
1287 /* struct btrfs_file_extent_item */
1288 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1290 static inline unsigned long btrfs_file_extent_inline_start(struct
1291 btrfs_file_extent_item
*e
)
1293 unsigned long offset
= (unsigned long)e
;
1294 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1298 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1300 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1303 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1304 struct btrfs_item
*e
)
1306 unsigned long offset
;
1307 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1308 return btrfs_item_size(eb
, e
) - offset
;
1311 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1313 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1315 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1316 disk_num_bytes
, 64);
1317 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1319 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1322 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1324 return sb
->s_fs_info
;
1327 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1328 const char *name
, int len
)
1330 /* if we already have a name just free it */
1334 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1338 memcpy(root
->name
, name
, len
);
1339 root
->name
[len
] ='\0';
1344 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1346 return root
->leafsize
;
1347 return root
->nodesize
;
1350 /* helper function to cast into the data area of the leaf. */
1351 #define btrfs_item_ptr(leaf, slot, type) \
1352 ((type *)(btrfs_leaf_data(leaf) + \
1353 btrfs_item_offset_nr(leaf, slot)))
1355 #define btrfs_item_ptr_offset(leaf, slot) \
1356 ((unsigned long)(btrfs_leaf_data(leaf) + \
1357 btrfs_item_offset_nr(leaf, slot)))
1359 static inline struct dentry
*fdentry(struct file
*file
) {
1360 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1361 return file
->f_dentry
;
1363 return file
->f_path
.dentry
;
1368 u32
btrfs_count_snapshots_in_path(struct btrfs_root
*root
,
1369 struct btrfs_path
*count_path
,
1370 u64 expected_owner
, u64 first_extent
);
1371 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1372 struct btrfs_root
*root
);
1373 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1374 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1375 btrfs_fs_info
*info
,
1377 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1378 struct btrfs_block_group_cache
1379 *hint
, u64 search_start
,
1380 int data
, int owner
);
1381 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1382 struct btrfs_root
*root
,
1390 int btrfs_shrink_extent_tree(struct btrfs_root
*root
, u64 new_size
);
1391 int btrfs_insert_extent_backref(struct btrfs_trans_handle
*trans
,
1392 struct btrfs_root
*root
,
1393 struct btrfs_path
*path
, u64 bytenr
,
1394 u64 root_objectid
, u64 ref_generation
,
1395 u64 owner
, u64 owner_offset
);
1396 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1397 struct btrfs_root
*root
,
1398 u64 num_bytes
, u64 min_bytes
,
1399 u64 root_objectid
, u64 ref_generation
,
1400 u64 owner
, u64 owner_offset
,
1401 u64 empty_size
, u64 hint_byte
,
1402 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1403 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1404 struct btrfs_root
*root
,
1405 u64 root_objectid
, u64 ref_generation
,
1406 u64 owner
, u64 owner_offset
,
1407 struct btrfs_key
*ins
);
1408 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1409 struct btrfs_root
*root
,
1410 u64 num_bytes
, u64 min_alloc_size
,
1411 u64 empty_size
, u64 hint_byte
,
1412 u64 search_end
, struct btrfs_key
*ins
,
1414 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1415 struct extent_buffer
*buf
);
1416 int btrfs_free_extent(struct btrfs_trans_handle
*trans
, struct btrfs_root
1417 *root
, u64 bytenr
, u64 num_bytes
,
1418 u64 root_objectid
, u64 ref_generation
,
1419 u64 owner_objectid
, u64 owner_offset
, int pin
);
1420 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1421 struct btrfs_root
*root
,
1422 struct extent_io_tree
*unpin
);
1423 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1424 struct btrfs_root
*root
,
1425 u64 bytenr
, u64 num_bytes
,
1426 u64 root_objectid
, u64 ref_generation
,
1427 u64 owner
, u64 owner_offset
);
1428 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1429 struct btrfs_root
*root
);
1430 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1431 int btrfs_read_block_groups(struct btrfs_root
*root
);
1432 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1433 struct btrfs_root
*root
, u64 bytes_used
,
1434 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1437 int btrfs_previous_item(struct btrfs_root
*root
,
1438 struct btrfs_path
*path
, u64 min_objectid
,
1441 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1442 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1443 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1444 struct btrfs_key
*key
, int lowest_level
,
1445 int cache_only
, u64 min_trans
);
1446 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1447 struct btrfs_path
*path
, int cache_only
,
1450 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1451 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1452 struct extent_buffer
*parent
, int parent_slot
,
1453 struct extent_buffer
**cow_ret
);
1454 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1455 struct btrfs_root
*root
,
1456 struct extent_buffer
*buf
,
1457 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1458 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1459 *root
, struct btrfs_path
*path
, u32 data_size
);
1460 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1461 struct btrfs_root
*root
,
1462 struct btrfs_path
*path
,
1463 u32 new_size
, int from_end
);
1464 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1465 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1467 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1468 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1469 int start_slot
, int cache_only
, u64
*last_ret
,
1470 struct btrfs_key
*progress
);
1471 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1472 struct btrfs_path
*btrfs_alloc_path(void);
1473 void btrfs_free_path(struct btrfs_path
*p
);
1474 void btrfs_init_path(struct btrfs_path
*p
);
1475 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1476 struct btrfs_path
*path
, int slot
, int nr
);
1478 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1479 struct btrfs_root
*root
,
1480 struct btrfs_path
*path
)
1482 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1485 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1486 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1487 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1488 struct btrfs_root
*root
,
1489 struct btrfs_path
*path
,
1490 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1492 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1493 struct btrfs_root
*root
,
1494 struct btrfs_path
*path
,
1495 struct btrfs_key
*key
,
1498 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1501 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1502 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1503 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1504 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1507 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1508 struct btrfs_key
*key
);
1509 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1510 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1512 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1513 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1515 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1516 btrfs_root_item
*item
, struct btrfs_key
*key
);
1517 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1518 u64
*found_objectid
);
1519 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1520 struct btrfs_root
*latest_root
);
1522 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1523 *root
, const char *name
, int name_len
, u64 dir
,
1524 struct btrfs_key
*location
, u8 type
);
1525 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1526 struct btrfs_root
*root
,
1527 struct btrfs_path
*path
, u64 dir
,
1528 const char *name
, int name_len
,
1530 struct btrfs_dir_item
*
1531 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1532 struct btrfs_root
*root
,
1533 struct btrfs_path
*path
, u64 dir
,
1534 u64 objectid
, const char *name
, int name_len
,
1536 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1537 struct btrfs_path
*path
,
1538 const char *name
, int name_len
);
1539 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1540 struct btrfs_root
*root
,
1541 struct btrfs_path
*path
,
1542 struct btrfs_dir_item
*di
);
1543 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1544 struct btrfs_root
*root
, const char *name
,
1545 u16 name_len
, const void *data
, u16 data_len
,
1547 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1548 struct btrfs_root
*root
,
1549 struct btrfs_path
*path
, u64 dir
,
1550 const char *name
, u16 name_len
,
1553 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1554 struct btrfs_root
*fs_root
,
1555 u64 dirid
, u64
*objectid
);
1556 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1559 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1560 struct btrfs_root
*root
,
1561 const char *name
, int name_len
,
1562 u64 inode_objectid
, u64 ref_objectid
);
1563 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1564 struct btrfs_root
*root
,
1565 const char *name
, int name_len
,
1566 u64 inode_objectid
, u64 ref_objectid
);
1567 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1568 struct btrfs_root
*root
,
1569 struct btrfs_path
*path
, u64 objectid
);
1570 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1571 *root
, struct btrfs_path
*path
,
1572 struct btrfs_key
*location
, int mod
);
1575 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1576 struct btrfs_root
*root
,
1577 u64 objectid
, u64 pos
, u64 disk_offset
,
1579 u64 num_bytes
, u64 offset
);
1580 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1581 struct btrfs_root
*root
,
1582 struct btrfs_path
*path
, u64 objectid
,
1583 u64 bytenr
, int mod
);
1584 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1585 struct btrfs_root
*root
, struct inode
*inode
,
1586 struct btrfs_ordered_sum
*sums
);
1587 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1589 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1590 struct btrfs_root
*root
,
1591 struct btrfs_path
*path
,
1592 u64 objectid
, u64 offset
,
1594 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1595 struct btrfs_root
*root
, struct btrfs_path
*path
,
1599 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1600 #ifdef ClearPageFsMisc
1601 #define ClearPageChecked ClearPageFsMisc
1602 #define SetPageChecked SetPageFsMisc
1603 #define PageChecked PageFsMisc
1606 int btrfs_writepages(struct address_space
*mapping
,
1607 struct writeback_control
*wbc
);
1608 int btrfs_create_subvol_root(struct btrfs_root
*new_root
,
1609 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1610 struct btrfs_block_group_cache
*block_group
);
1612 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1615 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1616 size_t size
, struct bio
*bio
);
1618 static inline void dec_i_blocks(struct inode
*inode
, u64 dec
)
1621 if (dec
<= inode
->i_blocks
)
1622 inode
->i_blocks
-= dec
;
1624 inode
->i_blocks
= 0;
1627 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1628 struct file_ra_state
*ra
, struct file
*file
,
1629 pgoff_t offset
, pgoff_t last_index
);
1630 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1632 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1633 int btrfs_readpage(struct file
*file
, struct page
*page
);
1634 void btrfs_delete_inode(struct inode
*inode
);
1635 void btrfs_put_inode(struct inode
*inode
);
1636 void btrfs_read_locked_inode(struct inode
*inode
);
1637 int btrfs_write_inode(struct inode
*inode
, int wait
);
1638 void btrfs_dirty_inode(struct inode
*inode
);
1639 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1640 void btrfs_destroy_inode(struct inode
*inode
);
1641 int btrfs_init_cachep(void);
1642 void btrfs_destroy_cachep(void);
1643 long btrfs_ioctl_trans_end(struct file
*file
);
1644 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1645 struct btrfs_root
*root
);
1646 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1648 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1649 unsigned from
, unsigned to
);
1650 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1651 size_t page_offset
, u64 start
, u64 end
,
1653 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1654 struct btrfs_root
*root
,
1655 struct inode
*inode
);
1658 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1661 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
);
1662 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1663 extern struct file_operations btrfs_file_operations
;
1664 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1665 struct btrfs_root
*root
, struct inode
*inode
,
1666 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1667 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1670 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1671 struct btrfs_root
*root
, int cache_only
);
1674 int btrfs_init_sysfs(void);
1675 void btrfs_exit_sysfs(void);
1676 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1677 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1678 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1679 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1682 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1683 int btrfs_delete_xattrs(struct btrfs_trans_handle
*trans
,
1684 struct btrfs_root
*root
, struct inode
*inode
);
1686 u64
btrfs_parse_size(char *str
);
1687 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1688 int btrfs_sync_fs(struct super_block
*sb
, int wait
);