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 "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
;
40 struct btrfs_ordered_sum
;
42 #define BTRFS_MAGIC "_BCRfS_M"
44 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
47 # define BTRFS_MAX_LEVEL 7
49 # define BTRFS_MAX_LEVEL 8
52 /* holds pointers to all of the tree roots */
53 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
55 /* stores information about which extents are in use, and reference counts */
56 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
59 * chunk tree stores translations from logical -> physical block numbering
60 * the super block points to the chunk tree
62 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
65 * stores information about which areas of a given device are in use.
66 * one per device. The tree of tree roots points to the device tree
68 #define BTRFS_DEV_TREE_OBJECTID 4ULL
70 /* one per subvolume, storing files and directories */
71 #define BTRFS_FS_TREE_OBJECTID 5ULL
73 /* directory objectid inside the root tree */
74 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 /* orhpan objectid for tracking unlinked/truncated files */
77 #define BTRFS_ORPHAN_OBJECTID -5ULL
79 /* does write ahead logging to speed up fsyncs */
80 #define BTRFS_TREE_LOG_OBJECTID -6ULL
81 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
83 /* for space balancing */
84 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
85 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
87 /* dummy objectid represents multiple objectids */
88 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
91 * All files have objectids in this range.
93 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
94 #define BTRFS_LAST_FREE_OBJECTID -256ULL
95 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
99 * the device items go into the chunk tree. The key is in the form
100 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
102 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
105 * we can actually store much bigger names, but lets not confuse the rest
108 #define BTRFS_NAME_LEN 255
110 /* 32 bytes in various csum fields */
111 #define BTRFS_CSUM_SIZE 32
112 /* four bytes for CRC32 */
113 #define BTRFS_CRC32_SIZE 4
114 #define BTRFS_EMPTY_DIR_SIZE 0
116 #define BTRFS_FT_UNKNOWN 0
117 #define BTRFS_FT_REG_FILE 1
118 #define BTRFS_FT_DIR 2
119 #define BTRFS_FT_CHRDEV 3
120 #define BTRFS_FT_BLKDEV 4
121 #define BTRFS_FT_FIFO 5
122 #define BTRFS_FT_SOCK 6
123 #define BTRFS_FT_SYMLINK 7
124 #define BTRFS_FT_XATTR 8
125 #define BTRFS_FT_MAX 9
128 * the key defines the order in the tree, and so it also defines (optimal)
129 * block layout. objectid corresonds to the inode number. The flags
130 * tells us things about the object, and is a kind of stream selector.
131 * so for a given inode, keys with flags of 1 might refer to the inode
132 * data, flags of 2 may point to file data in the btree and flags == 3
133 * may point to extents.
135 * offset is the starting byte offset for this key in the stream.
137 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
138 * in cpu native order. Otherwise they are identical and their sizes
139 * should be the same (ie both packed)
141 struct btrfs_disk_key
{
145 } __attribute__ ((__packed__
));
151 } __attribute__ ((__packed__
));
153 struct btrfs_mapping_tree
{
154 struct extent_map_tree map_tree
;
157 #define BTRFS_UUID_SIZE 16
158 struct btrfs_dev_item
{
159 /* the internal btrfs device id */
162 /* size of the device */
168 /* optimal io alignment for this device */
171 /* optimal io width for this device */
174 /* minimal io size for this device */
177 /* type and info about this device */
180 /* grouping information for allocation decisions */
183 /* seek speed 0-100 where 100 is fastest */
186 /* bandwidth 0-100 where 100 is fastest */
189 /* btrfs generated uuid for this device */
190 u8 uuid
[BTRFS_UUID_SIZE
];
191 } __attribute__ ((__packed__
));
193 struct btrfs_stripe
{
196 u8 dev_uuid
[BTRFS_UUID_SIZE
];
197 } __attribute__ ((__packed__
));
200 /* size of this chunk in bytes */
203 /* objectid of the root referencing this chunk */
209 /* optimal io alignment for this chunk */
212 /* optimal io width for this chunk */
215 /* minimal io size for this chunk */
218 /* 2^16 stripes is quite a lot, a second limit is the size of a single
223 /* sub stripes only matter for raid10 */
225 struct btrfs_stripe stripe
;
226 /* additional stripes go here */
227 } __attribute__ ((__packed__
));
229 static inline unsigned long btrfs_chunk_item_size(int num_stripes
)
231 BUG_ON(num_stripes
== 0);
232 return sizeof(struct btrfs_chunk
) +
233 sizeof(struct btrfs_stripe
) * (num_stripes
- 1);
236 #define BTRFS_FSID_SIZE 16
237 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
240 * every tree block (leaf or node) starts with this header.
242 struct btrfs_header
{
243 /* these first four must match the super block */
244 u8 csum
[BTRFS_CSUM_SIZE
];
245 u8 fsid
[BTRFS_FSID_SIZE
]; /* FS specific uuid */
246 __le64 bytenr
; /* which block this node is supposed to live in */
249 /* allowed to be different from the super from here on down */
250 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
255 } __attribute__ ((__packed__
));
257 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
258 sizeof(struct btrfs_header)) / \
259 sizeof(struct btrfs_key_ptr))
260 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
261 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
262 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
263 sizeof(struct btrfs_item) - \
264 sizeof(struct btrfs_file_extent_item))
268 * this is a very generous portion of the super block, giving us
269 * room to translate 14 chunks with 3 stripes each.
271 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
272 #define BTRFS_LABEL_SIZE 256
275 * the super block basically lists the main trees of the FS
276 * it currently lacks any block count etc etc
278 struct btrfs_super_block
{
279 u8 csum
[BTRFS_CSUM_SIZE
];
280 /* the first 4 fields must match struct btrfs_header */
281 u8 fsid
[16]; /* FS specific uuid */
282 __le64 bytenr
; /* this block number */
285 /* allowed to be different from the btrfs_header from here own down */
293 __le64 root_dir_objectid
;
299 __le32 sys_chunk_array_size
;
300 __le64 chunk_root_generation
;
304 struct btrfs_dev_item dev_item
;
305 char label
[BTRFS_LABEL_SIZE
];
306 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
307 } __attribute__ ((__packed__
));
310 * A leaf is full of items. offset and size tell us where to find
311 * the item in the leaf (relative to the start of the data area)
314 struct btrfs_disk_key key
;
317 } __attribute__ ((__packed__
));
320 * leaves have an item area and a data area:
321 * [item0, item1....itemN] [free space] [dataN...data1, data0]
323 * The data is separate from the items to get the keys closer together
327 struct btrfs_header header
;
328 struct btrfs_item items
[];
329 } __attribute__ ((__packed__
));
332 * all non-leaf blocks are nodes, they hold only keys and pointers to
335 struct btrfs_key_ptr
{
336 struct btrfs_disk_key key
;
339 } __attribute__ ((__packed__
));
342 struct btrfs_header header
;
343 struct btrfs_key_ptr ptrs
[];
344 } __attribute__ ((__packed__
));
347 * btrfs_paths remember the path taken from the root down to the leaf.
348 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
349 * to any other levels that are present.
351 * The slots array records the index of the item or block pointer
352 * used while walking the tree.
355 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
356 int slots
[BTRFS_MAX_LEVEL
];
357 /* if there is real range locking, this locks field will change */
358 int locks
[BTRFS_MAX_LEVEL
];
360 /* keep some upper locks as we walk down */
367 * items in the extent btree are used to record the objectid of the
368 * owner of the block and the number of references
370 struct btrfs_extent_item
{
372 } __attribute__ ((__packed__
));
374 struct btrfs_extent_ref
{
379 } __attribute__ ((__packed__
));
381 /* dev extents record free space on individual devices. The owner
382 * field points back to the chunk allocation mapping tree that allocated
383 * the extent. The chunk tree uuid field is a way to double check the owner
385 struct btrfs_dev_extent
{
387 __le64 chunk_objectid
;
390 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
391 } __attribute__ ((__packed__
));
393 struct btrfs_inode_ref
{
397 } __attribute__ ((__packed__
));
399 struct btrfs_timespec
{
402 } __attribute__ ((__packed__
));
405 BTRFS_COMPRESS_NONE
= 0,
406 BTRFS_COMPRESS_ZLIB
= 1,
407 BTRFS_COMPRESS_LAST
= 2,
408 } btrfs_compression_type
;
410 /* we don't understand any encryption methods right now */
412 BTRFS_ENCRYPTION_NONE
= 0,
413 BTRFS_ENCRYPTION_LAST
= 1,
414 } btrfs_encryption_type
;
416 struct btrfs_inode_item
{
417 /* nfs style generation number */
419 /* transid that last touched this inode */
432 struct btrfs_timespec atime
;
433 struct btrfs_timespec ctime
;
434 struct btrfs_timespec mtime
;
435 struct btrfs_timespec otime
;
436 } __attribute__ ((__packed__
));
438 struct btrfs_dir_log_item
{
440 } __attribute__ ((__packed__
));
442 struct btrfs_dir_item
{
443 struct btrfs_disk_key location
;
448 } __attribute__ ((__packed__
));
450 struct btrfs_root_item
{
451 struct btrfs_inode_item inode
;
459 struct btrfs_disk_key drop_progress
;
462 } __attribute__ ((__packed__
));
464 #define BTRFS_FILE_EXTENT_REG 0
465 #define BTRFS_FILE_EXTENT_INLINE 1
467 struct btrfs_file_extent_item
{
469 * transaction id that created this extent
473 * max number of bytes to hold this extent in ram
474 * when we split a compressed extent we can't know how big
475 * each of the resulting pieces will be. So, this is
476 * an upper limit on the size of the extent in ram instead of
482 * 32 bits for the various ways we might encode the data,
483 * including compression and encryption. If any of these
484 * are set to something a given disk format doesn't understand
485 * it is treated like an incompat flag for reading and writing,
490 __le16 other_encoding
; /* spare for later use */
492 /* are we inline data or a real extent? */
496 * disk space consumed by the extent, checksum blocks are included
500 __le64 disk_num_bytes
;
502 * the logical offset in file blocks (no csums)
503 * this extent record is for. This allows a file extent to point
504 * into the middle of an existing extent on disk, sharing it
505 * between two snapshots (useful if some bytes in the middle of the
506 * extent have changed
510 * the logical number of file blocks (no csums included). This
511 * always reflects the size uncompressed and without encoding.
515 } __attribute__ ((__packed__
));
517 struct btrfs_csum_item
{
519 } __attribute__ ((__packed__
));
521 /* different types of block groups (and chunks) */
522 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
523 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
524 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
525 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
526 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
527 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
528 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
530 struct btrfs_block_group_item
{
532 __le64 chunk_objectid
;
534 } __attribute__ ((__packed__
));
536 struct btrfs_space_info
{
544 struct list_head list
;
546 /* for block groups in our same type */
547 struct list_head block_groups
;
549 struct rw_semaphore groups_sem
;
552 struct btrfs_free_space
{
553 struct rb_node bytes_index
;
554 struct rb_node offset_index
;
559 struct btrfs_block_group_cache
{
560 struct btrfs_key key
;
561 struct btrfs_block_group_item item
;
563 struct mutex alloc_mutex
;
571 struct btrfs_space_info
*space_info
;
573 /* free space cache stuff */
574 struct rb_root free_space_bytes
;
575 struct rb_root free_space_offset
;
577 /* block group cache stuff */
578 struct rb_node cache_node
;
580 /* for block groups in the same raid type */
581 struct list_head list
;
584 struct btrfs_leaf_ref_tree
{
586 struct list_head list
;
591 struct btrfs_fs_devices
;
592 struct btrfs_fs_info
{
593 u8 fsid
[BTRFS_FSID_SIZE
];
594 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
595 struct btrfs_root
*extent_root
;
596 struct btrfs_root
*tree_root
;
597 struct btrfs_root
*chunk_root
;
598 struct btrfs_root
*dev_root
;
600 /* the log root tree is a directory of all the other log roots */
601 struct btrfs_root
*log_root_tree
;
602 struct radix_tree_root fs_roots_radix
;
604 /* block group cache stuff */
605 spinlock_t block_group_cache_lock
;
606 struct rb_root block_group_cache_tree
;
608 struct extent_io_tree pinned_extents
;
609 struct extent_io_tree pending_del
;
610 struct extent_io_tree extent_ins
;
612 /* logical->physical extent mapping */
613 struct btrfs_mapping_tree mapping_tree
;
616 u64 last_trans_committed
;
617 u64 last_trans_new_blockgroup
;
618 u64 open_ioctl_trans
;
619 unsigned long mount_opt
;
623 struct btrfs_transaction
*running_transaction
;
624 wait_queue_head_t transaction_throttle
;
625 wait_queue_head_t transaction_wait
;
626 wait_queue_head_t async_submit_wait
;
628 wait_queue_head_t tree_log_wait
;
630 struct btrfs_super_block super_copy
;
631 struct btrfs_super_block super_for_commit
;
632 struct block_device
*__bdev
;
633 struct super_block
*sb
;
634 struct inode
*btree_inode
;
635 struct backing_dev_info bdi
;
636 spinlock_t hash_lock
;
637 struct mutex trans_mutex
;
638 struct mutex tree_log_mutex
;
639 struct mutex transaction_kthread_mutex
;
640 struct mutex cleaner_mutex
;
641 struct mutex extent_ins_mutex
;
642 struct mutex pinned_mutex
;
643 struct mutex chunk_mutex
;
644 struct mutex drop_mutex
;
645 struct mutex volume_mutex
;
646 struct mutex tree_reloc_mutex
;
647 struct list_head trans_list
;
648 struct list_head hashers
;
649 struct list_head dead_roots
;
651 atomic_t nr_async_submits
;
652 atomic_t async_submit_draining
;
653 atomic_t nr_async_bios
;
654 atomic_t tree_log_writers
;
655 atomic_t tree_log_commit
;
656 unsigned long tree_log_batch
;
657 u64 tree_log_transid
;
660 * this is used by the balancing code to wait for all the pending
663 spinlock_t ordered_extent_lock
;
664 struct list_head ordered_extents
;
665 struct list_head delalloc_inodes
;
668 * there is a pool of worker threads for checksumming during writes
669 * and a pool for checksumming after reads. This is because readers
670 * can run with FS locks held, and the writers may be waiting for
671 * those locks. We don't want ordering in the pending list to cause
672 * deadlocks, and so the two are serviced separately.
674 * A third pool does submit_bio to avoid deadlocking with the other
677 struct btrfs_workers workers
;
678 struct btrfs_workers endio_workers
;
679 struct btrfs_workers endio_write_workers
;
680 struct btrfs_workers submit_workers
;
682 * fixup workers take dirty pages that didn't properly go through
683 * the cow mechanism and make them safe to write. It happens
684 * for the sys_munmap function call path
686 struct btrfs_workers fixup_workers
;
687 struct task_struct
*transaction_kthread
;
688 struct task_struct
*cleaner_kthread
;
689 int thread_pool_size
;
691 /* tree relocation relocated fields */
692 struct list_head dead_reloc_roots
;
693 struct btrfs_leaf_ref_tree reloc_ref_tree
;
694 struct btrfs_leaf_ref_tree shared_ref_tree
;
696 struct kobject super_kobj
;
697 struct completion kobj_unregister
;
700 int log_root_recovering
;
702 atomic_t throttle_gen
;
705 struct list_head dirty_cowonly_roots
;
707 struct btrfs_fs_devices
*fs_devices
;
708 struct list_head space_info
;
709 spinlock_t delalloc_lock
;
710 spinlock_t new_trans_lock
;
715 spinlock_t ref_cache_lock
;
716 u64 total_ref_cache_size
;
718 u64 avail_data_alloc_bits
;
719 u64 avail_metadata_alloc_bits
;
720 u64 avail_system_alloc_bits
;
721 u64 data_alloc_profile
;
722 u64 metadata_alloc_profile
;
723 u64 system_alloc_profile
;
729 * in ram representation of the tree. extent_root is used for all allocations
730 * and for the extent tree extent_root root.
732 struct btrfs_dirty_root
;
734 struct extent_buffer
*node
;
736 /* the node lock is held while changing the node pointer */
737 spinlock_t node_lock
;
739 struct extent_buffer
*commit_root
;
740 struct btrfs_leaf_ref_tree
*ref_tree
;
741 struct btrfs_leaf_ref_tree ref_tree_struct
;
742 struct btrfs_dirty_root
*dirty_root
;
743 struct btrfs_root
*log_root
;
744 struct btrfs_root
*reloc_root
;
746 struct btrfs_root_item root_item
;
747 struct btrfs_key root_key
;
748 struct btrfs_fs_info
*fs_info
;
750 struct extent_io_tree dirty_log_pages
;
752 struct kobject root_kobj
;
753 struct completion kobj_unregister
;
754 struct mutex objectid_mutex
;
755 struct mutex log_mutex
;
760 /* data allocations are done in sectorsize units */
763 /* node allocations are done in nodesize units */
766 /* leaf allocations are done in leafsize units */
773 u64 last_inode_alloc
;
776 u64 defrag_trans_start
;
777 struct btrfs_key defrag_progress
;
778 struct btrfs_key defrag_max
;
784 /* the dirty list is only used by non-reference counted roots */
785 struct list_head dirty_list
;
787 spinlock_t list_lock
;
788 struct list_head dead_list
;
789 struct list_head orphan_list
;
794 * inode items have the data typically returned from stat and store other
795 * info about object characteristics. There is one for every file and dir in
798 #define BTRFS_INODE_ITEM_KEY 1
799 #define BTRFS_INODE_REF_KEY 2
800 #define BTRFS_XATTR_ITEM_KEY 8
801 #define BTRFS_ORPHAN_ITEM_KEY 9
802 /* reserve 2-15 close to the inode for later flexibility */
805 * dir items are the name -> inode pointers in a directory. There is one
806 * for every name in a directory.
808 #define BTRFS_DIR_LOG_ITEM_KEY 14
809 #define BTRFS_DIR_LOG_INDEX_KEY 15
810 #define BTRFS_DIR_ITEM_KEY 16
811 #define BTRFS_DIR_INDEX_KEY 17
813 * extent data is for file data
815 #define BTRFS_EXTENT_DATA_KEY 18
817 * csum items have the checksums for data in the extents
819 #define BTRFS_CSUM_ITEM_KEY 19
822 /* reserve 21-31 for other file/dir stuff */
825 * root items point to tree roots. There are typically in the root
826 * tree used by the super block to find all the other trees
828 #define BTRFS_ROOT_ITEM_KEY 32
830 * extent items are in the extent map tree. These record which blocks
831 * are used, and how many references there are to each block
833 #define BTRFS_EXTENT_ITEM_KEY 33
834 #define BTRFS_EXTENT_REF_KEY 34
837 * block groups give us hints into the extent allocation trees. Which
838 * blocks are free etc etc
840 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
842 #define BTRFS_DEV_EXTENT_KEY 75
843 #define BTRFS_DEV_ITEM_KEY 76
844 #define BTRFS_CHUNK_ITEM_KEY 77
847 * string items are for debugging. They just store a short string of
850 #define BTRFS_STRING_ITEM_KEY 253
852 #define BTRFS_MOUNT_NODATASUM (1 << 0)
853 #define BTRFS_MOUNT_NODATACOW (1 << 1)
854 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
855 #define BTRFS_MOUNT_SSD (1 << 3)
856 #define BTRFS_MOUNT_DEGRADED (1 << 4)
857 #define BTRFS_MOUNT_COMPRESS (1 << 5)
859 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
860 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
861 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
866 #define BTRFS_INODE_NODATASUM (1 << 0)
867 #define BTRFS_INODE_NODATACOW (1 << 1)
868 #define BTRFS_INODE_READONLY (1 << 2)
869 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
870 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
872 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
874 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
876 /* some macros to generate set/get funcs for the struct fields. This
877 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
880 #define le8_to_cpu(v) (v)
881 #define cpu_to_le8(v) (v)
884 #define read_eb_member(eb, ptr, type, member, result) ( \
885 read_extent_buffer(eb, (char *)(result), \
886 ((unsigned long)(ptr)) + \
887 offsetof(type, member), \
888 sizeof(((type *)0)->member)))
890 #define write_eb_member(eb, ptr, type, member, result) ( \
891 write_extent_buffer(eb, (char *)(result), \
892 ((unsigned long)(ptr)) + \
893 offsetof(type, member), \
894 sizeof(((type *)0)->member)))
896 #ifndef BTRFS_SETGET_FUNCS
897 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
898 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
899 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
902 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
903 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
905 type *p = kmap_atomic(eb->first_page, KM_USER0); \
906 u##bits res = le##bits##_to_cpu(p->member); \
907 kunmap_atomic(p, KM_USER0); \
910 static inline void btrfs_set_##name(struct extent_buffer *eb, \
913 type *p = kmap_atomic(eb->first_page, KM_USER0); \
914 p->member = cpu_to_le##bits(val); \
915 kunmap_atomic(p, KM_USER0); \
918 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
919 static inline u##bits btrfs_##name(type *s) \
921 return le##bits##_to_cpu(s->member); \
923 static inline void btrfs_set_##name(type *s, u##bits val) \
925 s->member = cpu_to_le##bits(val); \
928 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
929 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
930 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
931 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
932 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
933 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
934 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
935 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
936 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
937 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
939 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
940 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
942 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
944 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
946 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
948 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
950 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
951 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
953 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
955 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
958 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
960 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
963 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
964 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
965 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
966 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
967 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
968 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
969 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
970 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
971 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
972 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
973 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
975 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
977 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
980 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
981 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
982 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
984 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
986 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
988 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
990 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
991 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
993 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
995 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
996 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
998 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
1001 unsigned long offset
= (unsigned long)c
;
1002 offset
+= offsetof(struct btrfs_chunk
, stripe
);
1003 offset
+= nr
* sizeof(struct btrfs_stripe
);
1004 return (struct btrfs_stripe
*)offset
;
1007 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1009 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1012 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1013 struct btrfs_chunk
*c
, int nr
)
1015 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1018 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1019 struct btrfs_chunk
*c
, int nr
,
1022 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1025 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1026 struct btrfs_chunk
*c
, int nr
)
1028 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1031 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1032 struct btrfs_chunk
*c
, int nr
,
1035 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1038 /* struct btrfs_block_group_item */
1039 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1041 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1043 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1044 struct btrfs_block_group_item
, chunk_objectid
, 64);
1046 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1047 struct btrfs_block_group_item
, chunk_objectid
, 64);
1048 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1049 struct btrfs_block_group_item
, flags
, 64);
1050 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1051 struct btrfs_block_group_item
, flags
, 64);
1053 /* struct btrfs_inode_ref */
1054 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1055 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1057 /* struct btrfs_inode_item */
1058 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1059 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1060 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1061 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1062 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1063 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1064 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1065 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1066 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1067 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1068 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
1069 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
1072 static inline struct btrfs_timespec
*
1073 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1075 unsigned long ptr
= (unsigned long)inode_item
;
1076 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1077 return (struct btrfs_timespec
*)ptr
;
1080 static inline struct btrfs_timespec
*
1081 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1083 unsigned long ptr
= (unsigned long)inode_item
;
1084 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1085 return (struct btrfs_timespec
*)ptr
;
1088 static inline struct btrfs_timespec
*
1089 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1091 unsigned long ptr
= (unsigned long)inode_item
;
1092 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1093 return (struct btrfs_timespec
*)ptr
;
1096 static inline struct btrfs_timespec
*
1097 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1099 unsigned long ptr
= (unsigned long)inode_item
;
1100 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1101 return (struct btrfs_timespec
*)ptr
;
1104 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1105 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1107 /* struct btrfs_dev_extent */
1108 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1110 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1111 chunk_objectid
, 64);
1112 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1114 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1116 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1118 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1119 return (u8
*)((unsigned long)dev
+ ptr
);
1122 /* struct btrfs_extent_ref */
1123 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1124 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1125 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1126 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1128 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1129 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1131 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1133 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1136 /* struct btrfs_extent_item */
1137 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1138 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1141 /* struct btrfs_node */
1142 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1143 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1145 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1148 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1149 sizeof(struct btrfs_key_ptr
) * nr
;
1150 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1153 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1157 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1158 sizeof(struct btrfs_key_ptr
) * nr
;
1159 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1162 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1165 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1166 sizeof(struct btrfs_key_ptr
) * nr
;
1167 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1170 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1174 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1175 sizeof(struct btrfs_key_ptr
) * nr
;
1176 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1179 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1181 return offsetof(struct btrfs_node
, ptrs
) +
1182 sizeof(struct btrfs_key_ptr
) * nr
;
1185 void btrfs_node_key(struct extent_buffer
*eb
,
1186 struct btrfs_disk_key
*disk_key
, int nr
);
1188 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1189 struct btrfs_disk_key
*disk_key
, int nr
)
1192 ptr
= btrfs_node_key_ptr_offset(nr
);
1193 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1194 struct btrfs_key_ptr
, key
, disk_key
);
1197 /* struct btrfs_item */
1198 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1199 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1201 static inline unsigned long btrfs_item_nr_offset(int nr
)
1203 return offsetof(struct btrfs_leaf
, items
) +
1204 sizeof(struct btrfs_item
) * nr
;
1207 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1210 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1213 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1214 struct btrfs_item
*item
)
1216 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1219 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1221 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1224 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1226 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1229 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1231 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1234 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1235 struct btrfs_disk_key
*disk_key
, int nr
)
1237 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1238 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1241 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1242 struct btrfs_disk_key
*disk_key
, int nr
)
1244 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1245 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1248 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1250 /* struct btrfs_dir_item */
1251 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1252 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1253 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1254 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1256 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1257 struct btrfs_dir_item
*item
,
1258 struct btrfs_disk_key
*key
)
1260 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1263 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1264 struct btrfs_dir_item
*item
,
1265 struct btrfs_disk_key
*key
)
1267 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1270 /* struct btrfs_disk_key */
1271 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1273 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1274 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1276 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1277 struct btrfs_disk_key
*disk
)
1279 cpu
->offset
= le64_to_cpu(disk
->offset
);
1280 cpu
->type
= disk
->type
;
1281 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1284 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1285 struct btrfs_key
*cpu
)
1287 disk
->offset
= cpu_to_le64(cpu
->offset
);
1288 disk
->type
= cpu
->type
;
1289 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1292 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1293 struct btrfs_key
*key
, int nr
)
1295 struct btrfs_disk_key disk_key
;
1296 btrfs_node_key(eb
, &disk_key
, nr
);
1297 btrfs_disk_key_to_cpu(key
, &disk_key
);
1300 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1301 struct btrfs_key
*key
, int nr
)
1303 struct btrfs_disk_key disk_key
;
1304 btrfs_item_key(eb
, &disk_key
, nr
);
1305 btrfs_disk_key_to_cpu(key
, &disk_key
);
1308 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1309 struct btrfs_dir_item
*item
,
1310 struct btrfs_key
*key
)
1312 struct btrfs_disk_key disk_key
;
1313 btrfs_dir_item_key(eb
, item
, &disk_key
);
1314 btrfs_disk_key_to_cpu(key
, &disk_key
);
1318 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1323 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1328 /* struct btrfs_header */
1329 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1330 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1332 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1333 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1334 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1335 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1337 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1339 return (btrfs_header_flags(eb
) & flag
) == flag
;
1342 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1344 u64 flags
= btrfs_header_flags(eb
);
1345 btrfs_set_header_flags(eb
, flags
| flag
);
1346 return (flags
& flag
) == flag
;
1349 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1351 u64 flags
= btrfs_header_flags(eb
);
1352 btrfs_set_header_flags(eb
, flags
& ~flag
);
1353 return (flags
& flag
) == flag
;
1356 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1358 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1362 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1364 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1368 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1370 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1374 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1376 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1380 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1385 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1390 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1395 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1397 return (btrfs_header_level(eb
) == 0);
1400 /* struct btrfs_root_item */
1401 BTRFS_SETGET_FUNCS(disk_root_generation
, struct btrfs_root_item
,
1403 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1404 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1405 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1407 BTRFS_SETGET_STACK_FUNCS(root_generation
, struct btrfs_root_item
,
1409 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1410 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1411 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1412 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1413 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1414 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1415 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1417 /* struct btrfs_super_block */
1418 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1419 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1420 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1422 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1423 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1424 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1425 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation
,
1426 struct btrfs_super_block
, chunk_root_generation
, 64);
1427 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1429 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1431 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1432 chunk_root_level
, 8);
1433 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1435 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1437 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1439 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1441 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1443 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1445 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1447 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1449 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1450 root_dir_objectid
, 64);
1451 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1454 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1456 return offsetof(struct btrfs_leaf
, items
);
1459 /* struct btrfs_file_extent_item */
1460 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1462 static inline unsigned long btrfs_file_extent_inline_start(struct
1463 btrfs_file_extent_item
*e
)
1465 unsigned long offset
= (unsigned long)e
;
1466 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1470 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1472 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1475 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1477 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1479 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1480 disk_num_bytes
, 64);
1481 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1483 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1485 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1487 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1489 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1491 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1492 other_encoding
, 16);
1494 /* this returns the number of file bytes represented by the inline item.
1495 * If an item is compressed, this is the uncompressed size
1497 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1498 struct btrfs_file_extent_item
*e
)
1500 return btrfs_file_extent_ram_bytes(eb
, e
);
1504 * this returns the number of bytes used by the item on disk, minus the
1505 * size of any extent headers. If a file is compressed on disk, this is
1506 * the compressed size
1508 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1509 struct btrfs_item
*e
)
1511 unsigned long offset
;
1512 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1513 return btrfs_item_size(eb
, e
) - offset
;
1516 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1518 return sb
->s_fs_info
;
1521 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1522 const char *name
, int len
)
1524 /* if we already have a name just free it */
1528 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1532 memcpy(root
->name
, name
, len
);
1533 root
->name
[len
] ='\0';
1538 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1540 return root
->leafsize
;
1541 return root
->nodesize
;
1544 /* helper function to cast into the data area of the leaf. */
1545 #define btrfs_item_ptr(leaf, slot, type) \
1546 ((type *)(btrfs_leaf_data(leaf) + \
1547 btrfs_item_offset_nr(leaf, slot)))
1549 #define btrfs_item_ptr_offset(leaf, slot) \
1550 ((unsigned long)(btrfs_leaf_data(leaf) + \
1551 btrfs_item_offset_nr(leaf, slot)))
1553 static inline struct dentry
*fdentry(struct file
*file
)
1555 return file
->f_path
.dentry
;
1559 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1560 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1561 struct btrfs_root
*root
, u64 bytenr
,
1562 u64 num_bytes
, u32
*refs
);
1563 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1564 u64 bytenr
, u64 num
, int pin
);
1565 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1566 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1567 int btrfs_cross_ref_exists(struct btrfs_trans_handle
*trans
,
1568 struct btrfs_root
*root
,
1569 struct btrfs_key
*key
, u64 bytenr
);
1570 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1571 struct btrfs_root
*root
);
1572 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1573 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1574 btrfs_fs_info
*info
,
1576 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1577 struct btrfs_block_group_cache
1578 *hint
, u64 search_start
,
1579 int data
, int owner
);
1580 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1581 struct btrfs_root
*root
,
1582 u32 blocksize
, u64 parent
,
1588 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1589 struct btrfs_root
*root
,
1590 u64 bytenr
, u32 blocksize
);
1591 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1592 struct btrfs_root
*root
,
1593 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1594 u64 root_objectid
, u64 ref_generation
,
1595 u64 owner
, u64 empty_size
, u64 hint_byte
,
1596 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1597 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1598 struct btrfs_root
*root
, u64 parent
,
1599 u64 root_objectid
, u64 ref_generation
,
1600 u64 owner
, struct btrfs_key
*ins
);
1601 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1602 struct btrfs_root
*root
, u64 parent
,
1603 u64 root_objectid
, u64 ref_generation
,
1604 u64 owner
, struct btrfs_key
*ins
);
1605 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1606 struct btrfs_root
*root
,
1607 u64 num_bytes
, u64 min_alloc_size
,
1608 u64 empty_size
, u64 hint_byte
,
1609 u64 search_end
, struct btrfs_key
*ins
,
1611 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1612 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1614 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1615 struct extent_buffer
*buf
, u32 nr_extents
);
1616 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1617 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1618 struct extent_buffer
*buf
, int start_slot
, int nr
);
1619 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1620 struct btrfs_root
*root
,
1621 u64 bytenr
, u64 num_bytes
, u64 parent
,
1622 u64 root_objectid
, u64 ref_generation
,
1623 u64 owner_objectid
, int pin
);
1624 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1625 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1626 struct btrfs_root
*root
,
1627 struct extent_io_tree
*unpin
);
1628 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1629 struct btrfs_root
*root
,
1630 u64 bytenr
, u64 num_bytes
, u64 parent
,
1631 u64 root_objectid
, u64 ref_generation
,
1632 u64 owner_objectid
);
1633 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1634 struct btrfs_root
*root
, u64 bytenr
,
1635 u64 orig_parent
, u64 parent
,
1636 u64 root_objectid
, u64 ref_generation
,
1637 u64 owner_objectid
);
1638 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1639 struct btrfs_root
*root
);
1640 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1641 int btrfs_read_block_groups(struct btrfs_root
*root
);
1642 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1643 struct btrfs_root
*root
, u64 bytes_used
,
1644 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1646 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1647 struct btrfs_root
*root
, u64 group_start
);
1648 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1649 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1650 struct btrfs_root
*root
);
1651 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1652 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1653 struct btrfs_root
*root
,
1654 struct extent_buffer
*buf
, u64 orig_start
);
1655 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1656 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1658 int btrfs_previous_item(struct btrfs_root
*root
,
1659 struct btrfs_path
*path
, u64 min_objectid
,
1661 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1662 struct btrfs_root
*root
,
1663 struct btrfs_key
*node_keys
,
1664 u64
*nodes
, int lowest_level
);
1665 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1666 struct btrfs_root
*root
, struct btrfs_path
*path
,
1667 struct btrfs_key
*new_key
);
1668 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1669 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1670 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1671 struct btrfs_key
*key
, int lowest_level
,
1672 int cache_only
, u64 min_trans
);
1673 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1674 struct btrfs_key
*max_key
,
1675 struct btrfs_path
*path
, int cache_only
,
1677 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1678 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1679 struct extent_buffer
*parent
, int parent_slot
,
1680 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1681 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1682 struct btrfs_root
*root
,
1683 struct extent_buffer
*buf
,
1684 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1685 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1686 *root
, struct btrfs_path
*path
, u32 data_size
);
1687 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1688 struct btrfs_root
*root
,
1689 struct btrfs_path
*path
,
1690 u32 new_size
, int from_end
);
1691 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1692 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1694 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1695 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1696 int start_slot
, int cache_only
, u64
*last_ret
,
1697 struct btrfs_key
*progress
);
1698 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1699 struct btrfs_path
*btrfs_alloc_path(void);
1700 void btrfs_free_path(struct btrfs_path
*p
);
1701 void btrfs_init_path(struct btrfs_path
*p
);
1702 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1703 struct btrfs_path
*path
, int slot
, int nr
);
1704 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1705 struct btrfs_root
*root
,
1706 struct btrfs_path
*path
, u64 bytenr
);
1707 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1708 struct btrfs_root
*root
,
1709 struct btrfs_path
*path
)
1711 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1714 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1715 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1716 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1717 struct btrfs_root
*root
,
1718 struct btrfs_path
*path
,
1719 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1721 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1722 struct btrfs_root
*root
,
1723 struct btrfs_path
*path
,
1724 struct btrfs_key
*key
,
1727 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1730 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1731 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1732 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1733 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1735 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1736 struct btrfs_root
*root
,
1737 struct extent_buffer
*node
,
1738 struct extent_buffer
*parent
);
1740 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1741 struct btrfs_key
*key
);
1742 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1743 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1745 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1746 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1748 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1749 btrfs_root_item
*item
, struct btrfs_key
*key
);
1750 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1751 u64
*found_objectid
);
1752 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1753 struct btrfs_root
*latest_root
);
1755 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1756 *root
, const char *name
, int name_len
, u64 dir
,
1757 struct btrfs_key
*location
, u8 type
, u64 index
);
1758 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1759 struct btrfs_root
*root
,
1760 struct btrfs_path
*path
, u64 dir
,
1761 const char *name
, int name_len
,
1763 struct btrfs_dir_item
*
1764 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1765 struct btrfs_root
*root
,
1766 struct btrfs_path
*path
, u64 dir
,
1767 u64 objectid
, const char *name
, int name_len
,
1769 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1770 struct btrfs_path
*path
,
1771 const char *name
, int name_len
);
1772 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1773 struct btrfs_root
*root
,
1774 struct btrfs_path
*path
,
1775 struct btrfs_dir_item
*di
);
1776 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1777 struct btrfs_root
*root
, const char *name
,
1778 u16 name_len
, const void *data
, u16 data_len
,
1780 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1781 struct btrfs_root
*root
,
1782 struct btrfs_path
*path
, u64 dir
,
1783 const char *name
, u16 name_len
,
1787 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1788 struct btrfs_root
*root
, u64 offset
);
1789 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1790 struct btrfs_root
*root
, u64 offset
);
1793 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1794 struct btrfs_root
*fs_root
,
1795 u64 dirid
, u64
*objectid
);
1796 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1799 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1800 struct btrfs_root
*root
,
1801 const char *name
, int name_len
,
1802 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1803 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1804 struct btrfs_root
*root
,
1805 const char *name
, int name_len
,
1806 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1807 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1808 struct btrfs_root
*root
,
1809 struct btrfs_path
*path
, u64 objectid
);
1810 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1811 *root
, struct btrfs_path
*path
,
1812 struct btrfs_key
*location
, int mod
);
1815 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1817 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1818 struct btrfs_root
*root
,
1819 u64 objectid
, u64 pos
,
1820 u64 disk_offset
, u64 disk_num_bytes
,
1821 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1822 u8 compression
, u8 encryption
, u16 other_encoding
);
1823 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1824 struct btrfs_root
*root
,
1825 struct btrfs_path
*path
, u64 objectid
,
1826 u64 bytenr
, int mod
);
1827 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1828 struct btrfs_root
*root
, struct inode
*inode
,
1829 struct btrfs_ordered_sum
*sums
);
1830 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1832 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1833 u64 start
, unsigned long len
);
1834 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1835 struct btrfs_root
*root
,
1836 struct btrfs_path
*path
,
1837 u64 objectid
, u64 offset
,
1839 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1840 struct btrfs_root
*root
, struct btrfs_path
*path
,
1844 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1845 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1846 #define ClearPageChecked ClearPageFsMisc
1847 #define SetPageChecked SetPageFsMisc
1848 #define PageChecked PageFsMisc
1851 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
1852 struct btrfs_root
*root
,
1853 struct inode
*dir
, struct inode
*inode
,
1854 const char *name
, int name_len
);
1855 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
1856 struct inode
*parent_inode
, struct inode
*inode
,
1857 const char *name
, int name_len
, int add_backref
, u64 index
);
1858 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
1859 struct btrfs_root
*root
,
1860 struct inode
*inode
, u64 new_size
,
1863 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
1864 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
1865 int btrfs_writepages(struct address_space
*mapping
,
1866 struct writeback_control
*wbc
);
1867 int btrfs_create_subvol_root(struct btrfs_root
*new_root
, struct dentry
*dentry
,
1868 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1869 struct btrfs_block_group_cache
*block_group
);
1871 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1874 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1875 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
1877 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1878 struct file_ra_state
*ra
, struct file
*file
,
1879 pgoff_t offset
, pgoff_t last_index
);
1880 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1882 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1883 int btrfs_readpage(struct file
*file
, struct page
*page
);
1884 void btrfs_delete_inode(struct inode
*inode
);
1885 void btrfs_put_inode(struct inode
*inode
);
1886 void btrfs_read_locked_inode(struct inode
*inode
);
1887 int btrfs_write_inode(struct inode
*inode
, int wait
);
1888 void btrfs_dirty_inode(struct inode
*inode
);
1889 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1890 void btrfs_destroy_inode(struct inode
*inode
);
1891 int btrfs_init_cachep(void);
1892 void btrfs_destroy_cachep(void);
1893 long btrfs_ioctl_trans_end(struct file
*file
);
1894 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1895 struct btrfs_root
*root
, int wait
);
1896 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1897 struct btrfs_root
*root
);
1898 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
1899 struct btrfs_root
*root
, int *is_new
);
1900 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1901 unsigned from
, unsigned to
);
1902 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1903 size_t page_offset
, u64 start
, u64 end
,
1905 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1906 struct btrfs_root
*root
,
1907 struct inode
*inode
);
1908 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1909 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1910 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
1911 int btrfs_cont_expand(struct inode
*inode
, loff_t size
);
1914 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1917 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
1918 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
1920 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1921 extern struct file_operations btrfs_file_operations
;
1922 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1923 struct btrfs_root
*root
, struct inode
*inode
,
1924 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1925 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1928 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1929 struct btrfs_root
*root
, int cache_only
);
1932 int btrfs_init_sysfs(void);
1933 void btrfs_exit_sysfs(void);
1934 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1935 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1936 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1937 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1940 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1943 u64
btrfs_parse_size(char *str
);
1944 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1945 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
1948 int btrfs_check_acl(struct inode
*inode
, int mask
);
1949 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
1950 int btrfs_acl_chmod(struct inode
*inode
);
1952 /* free-space-cache.c */
1953 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
1954 u64 bytenr
, u64 size
);
1955 int btrfs_add_free_space_lock(struct btrfs_block_group_cache
*block_group
,
1956 u64 offset
, u64 bytes
);
1957 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
1958 u64 bytenr
, u64 size
);
1959 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache
*block_group
,
1960 u64 offset
, u64 bytes
);
1961 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1963 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
1964 *block_group
, u64 offset
,
1966 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
1968 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);