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 "_BBRfS_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
;
303 struct btrfs_dev_item dev_item
;
304 char label
[BTRFS_LABEL_SIZE
];
305 u8 sys_chunk_array
[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE
];
306 } __attribute__ ((__packed__
));
309 * A leaf is full of items. offset and size tell us where to find
310 * the item in the leaf (relative to the start of the data area)
313 struct btrfs_disk_key key
;
316 } __attribute__ ((__packed__
));
319 * leaves have an item area and a data area:
320 * [item0, item1....itemN] [free space] [dataN...data1, data0]
322 * The data is separate from the items to get the keys closer together
326 struct btrfs_header header
;
327 struct btrfs_item items
[];
328 } __attribute__ ((__packed__
));
331 * all non-leaf blocks are nodes, they hold only keys and pointers to
334 struct btrfs_key_ptr
{
335 struct btrfs_disk_key key
;
338 } __attribute__ ((__packed__
));
341 struct btrfs_header header
;
342 struct btrfs_key_ptr ptrs
[];
343 } __attribute__ ((__packed__
));
346 * btrfs_paths remember the path taken from the root down to the leaf.
347 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
348 * to any other levels that are present.
350 * The slots array records the index of the item or block pointer
351 * used while walking the tree.
354 struct extent_buffer
*nodes
[BTRFS_MAX_LEVEL
];
355 int slots
[BTRFS_MAX_LEVEL
];
356 /* if there is real range locking, this locks field will change */
357 int locks
[BTRFS_MAX_LEVEL
];
359 /* keep some upper locks as we walk down */
366 * items in the extent btree are used to record the objectid of the
367 * owner of the block and the number of references
369 struct btrfs_extent_item
{
371 } __attribute__ ((__packed__
));
373 struct btrfs_extent_ref
{
378 } __attribute__ ((__packed__
));
380 /* dev extents record free space on individual devices. The owner
381 * field points back to the chunk allocation mapping tree that allocated
382 * the extent. The chunk tree uuid field is a way to double check the owner
384 struct btrfs_dev_extent
{
386 __le64 chunk_objectid
;
389 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
390 } __attribute__ ((__packed__
));
392 struct btrfs_inode_ref
{
396 } __attribute__ ((__packed__
));
398 struct btrfs_timespec
{
401 } __attribute__ ((__packed__
));
404 BTRFS_COMPRESS_NONE
= 0,
405 BTRFS_COMPRESS_ZLIB
= 1,
406 BTRFS_COMPRESS_LAST
= 2,
407 } btrfs_compression_type
;
409 /* we don't understand any encryption methods right now */
411 BTRFS_ENCRYPTION_NONE
= 0,
412 BTRFS_ENCRYPTION_LAST
= 1,
413 } btrfs_encryption_type
;
415 struct btrfs_inode_item
{
416 /* nfs style generation number */
418 /* transid that last touched this inode */
431 struct btrfs_timespec atime
;
432 struct btrfs_timespec ctime
;
433 struct btrfs_timespec mtime
;
434 struct btrfs_timespec otime
;
435 } __attribute__ ((__packed__
));
437 struct btrfs_dir_log_item
{
439 } __attribute__ ((__packed__
));
441 struct btrfs_dir_item
{
442 struct btrfs_disk_key location
;
447 } __attribute__ ((__packed__
));
449 struct btrfs_root_item
{
450 struct btrfs_inode_item inode
;
457 struct btrfs_disk_key drop_progress
;
460 } __attribute__ ((__packed__
));
462 #define BTRFS_FILE_EXTENT_REG 0
463 #define BTRFS_FILE_EXTENT_INLINE 1
465 struct btrfs_file_extent_item
{
467 * transaction id that created this extent
471 * max number of bytes to hold this extent in ram
472 * when we split a compressed extent we can't know how big
473 * each of the resulting pieces will be. So, this is
474 * an upper limit on the size of the extent in ram instead of
480 * 32 bits for the various ways we might encode the data,
481 * including compression and encryption. If any of these
482 * are set to something a given disk format doesn't understand
483 * it is treated like an incompat flag for reading and writing,
488 __le16 other_encoding
; /* spare for later use */
490 /* are we inline data or a real extent? */
494 * disk space consumed by the extent, checksum blocks are included
498 __le64 disk_num_bytes
;
500 * the logical offset in file blocks (no csums)
501 * this extent record is for. This allows a file extent to point
502 * into the middle of an existing extent on disk, sharing it
503 * between two snapshots (useful if some bytes in the middle of the
504 * extent have changed
508 * the logical number of file blocks (no csums included). This
509 * always reflects the size uncompressed and without encoding.
513 } __attribute__ ((__packed__
));
515 struct btrfs_csum_item
{
517 } __attribute__ ((__packed__
));
519 /* different types of block groups (and chunks) */
520 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
521 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
522 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
523 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
524 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
525 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
526 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
528 struct btrfs_block_group_item
{
530 __le64 chunk_objectid
;
532 } __attribute__ ((__packed__
));
534 struct btrfs_space_info
{
542 struct list_head list
;
544 /* for block groups in our same type */
545 struct list_head block_groups
;
549 struct btrfs_free_space
{
550 struct rb_node bytes_index
;
551 struct rb_node offset_index
;
556 struct btrfs_block_group_cache
{
557 struct btrfs_key key
;
558 struct btrfs_block_group_item item
;
567 struct btrfs_space_info
*space_info
;
569 /* free space cache stuff */
570 struct rb_root free_space_bytes
;
571 struct rb_root free_space_offset
;
573 /* block group cache stuff */
574 struct rb_node cache_node
;
576 /* for block groups in the same raid type */
577 struct list_head list
;
580 struct btrfs_leaf_ref_tree
{
582 struct list_head list
;
587 struct btrfs_fs_devices
;
588 struct btrfs_fs_info
{
589 u8 fsid
[BTRFS_FSID_SIZE
];
590 u8 chunk_tree_uuid
[BTRFS_UUID_SIZE
];
591 struct btrfs_root
*extent_root
;
592 struct btrfs_root
*tree_root
;
593 struct btrfs_root
*chunk_root
;
594 struct btrfs_root
*dev_root
;
596 /* the log root tree is a directory of all the other log roots */
597 struct btrfs_root
*log_root_tree
;
598 struct radix_tree_root fs_roots_radix
;
600 /* block group cache stuff */
601 spinlock_t block_group_cache_lock
;
602 struct rb_root block_group_cache_tree
;
604 struct extent_io_tree pinned_extents
;
605 struct extent_io_tree pending_del
;
606 struct extent_io_tree extent_ins
;
608 /* logical->physical extent mapping */
609 struct btrfs_mapping_tree mapping_tree
;
612 u64 last_trans_committed
;
613 u64 last_trans_new_blockgroup
;
614 u64 open_ioctl_trans
;
615 unsigned long mount_opt
;
619 struct btrfs_transaction
*running_transaction
;
620 wait_queue_head_t transaction_throttle
;
621 wait_queue_head_t transaction_wait
;
622 wait_queue_head_t async_submit_wait
;
624 wait_queue_head_t tree_log_wait
;
626 struct btrfs_super_block super_copy
;
627 struct btrfs_super_block super_for_commit
;
628 struct block_device
*__bdev
;
629 struct super_block
*sb
;
630 struct inode
*btree_inode
;
631 struct backing_dev_info bdi
;
632 spinlock_t hash_lock
;
633 struct mutex trans_mutex
;
634 struct mutex tree_log_mutex
;
635 struct mutex transaction_kthread_mutex
;
636 struct mutex cleaner_mutex
;
637 struct mutex alloc_mutex
;
638 struct mutex chunk_mutex
;
639 struct mutex drop_mutex
;
640 struct mutex volume_mutex
;
641 struct mutex tree_reloc_mutex
;
642 struct list_head trans_list
;
643 struct list_head hashers
;
644 struct list_head dead_roots
;
646 atomic_t nr_async_submits
;
647 atomic_t async_submit_draining
;
648 atomic_t nr_async_bios
;
649 atomic_t tree_log_writers
;
650 atomic_t tree_log_commit
;
651 unsigned long tree_log_batch
;
652 u64 tree_log_transid
;
655 * this is used by the balancing code to wait for all the pending
658 spinlock_t ordered_extent_lock
;
659 struct list_head ordered_extents
;
660 struct list_head delalloc_inodes
;
663 * there is a pool of worker threads for checksumming during writes
664 * and a pool for checksumming after reads. This is because readers
665 * can run with FS locks held, and the writers may be waiting for
666 * those locks. We don't want ordering in the pending list to cause
667 * deadlocks, and so the two are serviced separately.
669 * A third pool does submit_bio to avoid deadlocking with the other
672 struct btrfs_workers workers
;
673 struct btrfs_workers endio_workers
;
674 struct btrfs_workers endio_write_workers
;
675 struct btrfs_workers submit_workers
;
677 * fixup workers take dirty pages that didn't properly go through
678 * the cow mechanism and make them safe to write. It happens
679 * for the sys_munmap function call path
681 struct btrfs_workers fixup_workers
;
682 struct task_struct
*transaction_kthread
;
683 struct task_struct
*cleaner_kthread
;
684 int thread_pool_size
;
686 /* tree relocation relocated fields */
687 struct list_head dead_reloc_roots
;
688 struct btrfs_leaf_ref_tree reloc_ref_tree
;
689 struct btrfs_leaf_ref_tree shared_ref_tree
;
691 struct kobject super_kobj
;
692 struct completion kobj_unregister
;
695 int log_root_recovering
;
697 atomic_t throttle_gen
;
700 struct list_head dirty_cowonly_roots
;
702 struct btrfs_fs_devices
*fs_devices
;
703 struct list_head space_info
;
704 spinlock_t delalloc_lock
;
705 spinlock_t new_trans_lock
;
710 spinlock_t ref_cache_lock
;
711 u64 total_ref_cache_size
;
713 u64 avail_data_alloc_bits
;
714 u64 avail_metadata_alloc_bits
;
715 u64 avail_system_alloc_bits
;
716 u64 data_alloc_profile
;
717 u64 metadata_alloc_profile
;
718 u64 system_alloc_profile
;
724 * in ram representation of the tree. extent_root is used for all allocations
725 * and for the extent tree extent_root root.
727 struct btrfs_dirty_root
;
729 struct extent_buffer
*node
;
731 /* the node lock is held while changing the node pointer */
732 spinlock_t node_lock
;
734 struct extent_buffer
*commit_root
;
735 struct btrfs_leaf_ref_tree
*ref_tree
;
736 struct btrfs_leaf_ref_tree ref_tree_struct
;
737 struct btrfs_dirty_root
*dirty_root
;
738 struct btrfs_root
*log_root
;
739 struct btrfs_root
*reloc_root
;
741 struct btrfs_root_item root_item
;
742 struct btrfs_key root_key
;
743 struct btrfs_fs_info
*fs_info
;
745 struct extent_io_tree dirty_log_pages
;
747 struct kobject root_kobj
;
748 struct completion kobj_unregister
;
749 struct mutex objectid_mutex
;
750 struct mutex log_mutex
;
755 /* data allocations are done in sectorsize units */
758 /* node allocations are done in nodesize units */
761 /* leaf allocations are done in leafsize units */
768 u64 last_inode_alloc
;
771 u64 defrag_trans_start
;
772 struct btrfs_key defrag_progress
;
773 struct btrfs_key defrag_max
;
779 /* the dirty list is only used by non-reference counted roots */
780 struct list_head dirty_list
;
782 spinlock_t list_lock
;
783 struct list_head dead_list
;
784 struct list_head orphan_list
;
789 * inode items have the data typically returned from stat and store other
790 * info about object characteristics. There is one for every file and dir in
793 #define BTRFS_INODE_ITEM_KEY 1
794 #define BTRFS_INODE_REF_KEY 2
795 #define BTRFS_XATTR_ITEM_KEY 8
796 #define BTRFS_ORPHAN_ITEM_KEY 9
797 /* reserve 2-15 close to the inode for later flexibility */
800 * dir items are the name -> inode pointers in a directory. There is one
801 * for every name in a directory.
803 #define BTRFS_DIR_LOG_ITEM_KEY 14
804 #define BTRFS_DIR_LOG_INDEX_KEY 15
805 #define BTRFS_DIR_ITEM_KEY 16
806 #define BTRFS_DIR_INDEX_KEY 17
808 * extent data is for file data
810 #define BTRFS_EXTENT_DATA_KEY 18
812 * csum items have the checksums for data in the extents
814 #define BTRFS_CSUM_ITEM_KEY 19
817 /* reserve 21-31 for other file/dir stuff */
820 * root items point to tree roots. There are typically in the root
821 * tree used by the super block to find all the other trees
823 #define BTRFS_ROOT_ITEM_KEY 32
825 * extent items are in the extent map tree. These record which blocks
826 * are used, and how many references there are to each block
828 #define BTRFS_EXTENT_ITEM_KEY 33
829 #define BTRFS_EXTENT_REF_KEY 34
832 * block groups give us hints into the extent allocation trees. Which
833 * blocks are free etc etc
835 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
837 #define BTRFS_DEV_EXTENT_KEY 75
838 #define BTRFS_DEV_ITEM_KEY 76
839 #define BTRFS_CHUNK_ITEM_KEY 77
842 * string items are for debugging. They just store a short string of
845 #define BTRFS_STRING_ITEM_KEY 253
847 #define BTRFS_MOUNT_NODATASUM (1 << 0)
848 #define BTRFS_MOUNT_NODATACOW (1 << 1)
849 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
850 #define BTRFS_MOUNT_SSD (1 << 3)
851 #define BTRFS_MOUNT_DEGRADED (1 << 4)
852 #define BTRFS_MOUNT_COMPRESS (1 << 5)
854 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
855 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
856 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
861 #define BTRFS_INODE_NODATASUM (1 << 0)
862 #define BTRFS_INODE_NODATACOW (1 << 1)
863 #define BTRFS_INODE_READONLY (1 << 2)
864 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
865 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
867 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
869 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
871 /* some macros to generate set/get funcs for the struct fields. This
872 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
875 #define le8_to_cpu(v) (v)
876 #define cpu_to_le8(v) (v)
879 #define read_eb_member(eb, ptr, type, member, result) ( \
880 read_extent_buffer(eb, (char *)(result), \
881 ((unsigned long)(ptr)) + \
882 offsetof(type, member), \
883 sizeof(((type *)0)->member)))
885 #define write_eb_member(eb, ptr, type, member, result) ( \
886 write_extent_buffer(eb, (char *)(result), \
887 ((unsigned long)(ptr)) + \
888 offsetof(type, member), \
889 sizeof(((type *)0)->member)))
891 #ifndef BTRFS_SETGET_FUNCS
892 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
893 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
894 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
897 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
898 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
900 type *p = kmap_atomic(eb->first_page, KM_USER0); \
901 u##bits res = le##bits##_to_cpu(p->member); \
902 kunmap_atomic(p, KM_USER0); \
905 static inline void btrfs_set_##name(struct extent_buffer *eb, \
908 type *p = kmap_atomic(eb->first_page, KM_USER0); \
909 p->member = cpu_to_le##bits(val); \
910 kunmap_atomic(p, KM_USER0); \
913 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
914 static inline u##bits btrfs_##name(type *s) \
916 return le##bits##_to_cpu(s->member); \
918 static inline void btrfs_set_##name(type *s, u##bits val) \
920 s->member = cpu_to_le##bits(val); \
923 BTRFS_SETGET_FUNCS(device_type
, struct btrfs_dev_item
, type
, 64);
924 BTRFS_SETGET_FUNCS(device_total_bytes
, struct btrfs_dev_item
, total_bytes
, 64);
925 BTRFS_SETGET_FUNCS(device_bytes_used
, struct btrfs_dev_item
, bytes_used
, 64);
926 BTRFS_SETGET_FUNCS(device_io_align
, struct btrfs_dev_item
, io_align
, 32);
927 BTRFS_SETGET_FUNCS(device_io_width
, struct btrfs_dev_item
, io_width
, 32);
928 BTRFS_SETGET_FUNCS(device_sector_size
, struct btrfs_dev_item
, sector_size
, 32);
929 BTRFS_SETGET_FUNCS(device_id
, struct btrfs_dev_item
, devid
, 64);
930 BTRFS_SETGET_FUNCS(device_group
, struct btrfs_dev_item
, dev_group
, 32);
931 BTRFS_SETGET_FUNCS(device_seek_speed
, struct btrfs_dev_item
, seek_speed
, 8);
932 BTRFS_SETGET_FUNCS(device_bandwidth
, struct btrfs_dev_item
, bandwidth
, 8);
934 BTRFS_SETGET_STACK_FUNCS(stack_device_type
, struct btrfs_dev_item
, type
, 64);
935 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes
, struct btrfs_dev_item
,
937 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used
, struct btrfs_dev_item
,
939 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align
, struct btrfs_dev_item
,
941 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width
, struct btrfs_dev_item
,
943 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size
, struct btrfs_dev_item
,
945 BTRFS_SETGET_STACK_FUNCS(stack_device_id
, struct btrfs_dev_item
, devid
, 64);
946 BTRFS_SETGET_STACK_FUNCS(stack_device_group
, struct btrfs_dev_item
,
948 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed
, struct btrfs_dev_item
,
950 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth
, struct btrfs_dev_item
,
953 static inline char *btrfs_device_uuid(struct btrfs_dev_item
*d
)
955 return (char *)d
+ offsetof(struct btrfs_dev_item
, uuid
);
958 BTRFS_SETGET_FUNCS(chunk_length
, struct btrfs_chunk
, length
, 64);
959 BTRFS_SETGET_FUNCS(chunk_owner
, struct btrfs_chunk
, owner
, 64);
960 BTRFS_SETGET_FUNCS(chunk_stripe_len
, struct btrfs_chunk
, stripe_len
, 64);
961 BTRFS_SETGET_FUNCS(chunk_io_align
, struct btrfs_chunk
, io_align
, 32);
962 BTRFS_SETGET_FUNCS(chunk_io_width
, struct btrfs_chunk
, io_width
, 32);
963 BTRFS_SETGET_FUNCS(chunk_sector_size
, struct btrfs_chunk
, sector_size
, 32);
964 BTRFS_SETGET_FUNCS(chunk_type
, struct btrfs_chunk
, type
, 64);
965 BTRFS_SETGET_FUNCS(chunk_num_stripes
, struct btrfs_chunk
, num_stripes
, 16);
966 BTRFS_SETGET_FUNCS(chunk_sub_stripes
, struct btrfs_chunk
, sub_stripes
, 16);
967 BTRFS_SETGET_FUNCS(stripe_devid
, struct btrfs_stripe
, devid
, 64);
968 BTRFS_SETGET_FUNCS(stripe_offset
, struct btrfs_stripe
, offset
, 64);
970 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe
*s
)
972 return (char *)s
+ offsetof(struct btrfs_stripe
, dev_uuid
);
975 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length
, struct btrfs_chunk
, length
, 64);
976 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner
, struct btrfs_chunk
, owner
, 64);
977 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len
, struct btrfs_chunk
,
979 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align
, struct btrfs_chunk
,
981 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width
, struct btrfs_chunk
,
983 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size
, struct btrfs_chunk
,
985 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type
, struct btrfs_chunk
, type
, 64);
986 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes
, struct btrfs_chunk
,
988 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes
, struct btrfs_chunk
,
990 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid
, struct btrfs_stripe
, devid
, 64);
991 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset
, struct btrfs_stripe
, offset
, 64);
993 static inline struct btrfs_stripe
*btrfs_stripe_nr(struct btrfs_chunk
*c
,
996 unsigned long offset
= (unsigned long)c
;
997 offset
+= offsetof(struct btrfs_chunk
, stripe
);
998 offset
+= nr
* sizeof(struct btrfs_stripe
);
999 return (struct btrfs_stripe
*)offset
;
1002 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk
*c
, int nr
)
1004 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c
, nr
));
1007 static inline u64
btrfs_stripe_offset_nr(struct extent_buffer
*eb
,
1008 struct btrfs_chunk
*c
, int nr
)
1010 return btrfs_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
));
1013 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer
*eb
,
1014 struct btrfs_chunk
*c
, int nr
,
1017 btrfs_set_stripe_offset(eb
, btrfs_stripe_nr(c
, nr
), val
);
1020 static inline u64
btrfs_stripe_devid_nr(struct extent_buffer
*eb
,
1021 struct btrfs_chunk
*c
, int nr
)
1023 return btrfs_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
));
1026 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer
*eb
,
1027 struct btrfs_chunk
*c
, int nr
,
1030 btrfs_set_stripe_devid(eb
, btrfs_stripe_nr(c
, nr
), val
);
1033 /* struct btrfs_block_group_item */
1034 BTRFS_SETGET_STACK_FUNCS(block_group_used
, struct btrfs_block_group_item
,
1036 BTRFS_SETGET_FUNCS(disk_block_group_used
, struct btrfs_block_group_item
,
1038 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid
,
1039 struct btrfs_block_group_item
, chunk_objectid
, 64);
1041 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid
,
1042 struct btrfs_block_group_item
, chunk_objectid
, 64);
1043 BTRFS_SETGET_FUNCS(disk_block_group_flags
,
1044 struct btrfs_block_group_item
, flags
, 64);
1045 BTRFS_SETGET_STACK_FUNCS(block_group_flags
,
1046 struct btrfs_block_group_item
, flags
, 64);
1048 /* struct btrfs_inode_ref */
1049 BTRFS_SETGET_FUNCS(inode_ref_name_len
, struct btrfs_inode_ref
, name_len
, 16);
1050 BTRFS_SETGET_FUNCS(inode_ref_index
, struct btrfs_inode_ref
, index
, 64);
1052 /* struct btrfs_inode_item */
1053 BTRFS_SETGET_FUNCS(inode_generation
, struct btrfs_inode_item
, generation
, 64);
1054 BTRFS_SETGET_FUNCS(inode_transid
, struct btrfs_inode_item
, transid
, 64);
1055 BTRFS_SETGET_FUNCS(inode_size
, struct btrfs_inode_item
, size
, 64);
1056 BTRFS_SETGET_FUNCS(inode_nbytes
, struct btrfs_inode_item
, nbytes
, 64);
1057 BTRFS_SETGET_FUNCS(inode_block_group
, struct btrfs_inode_item
, block_group
, 64);
1058 BTRFS_SETGET_FUNCS(inode_nlink
, struct btrfs_inode_item
, nlink
, 32);
1059 BTRFS_SETGET_FUNCS(inode_uid
, struct btrfs_inode_item
, uid
, 32);
1060 BTRFS_SETGET_FUNCS(inode_gid
, struct btrfs_inode_item
, gid
, 32);
1061 BTRFS_SETGET_FUNCS(inode_mode
, struct btrfs_inode_item
, mode
, 32);
1062 BTRFS_SETGET_FUNCS(inode_rdev
, struct btrfs_inode_item
, rdev
, 64);
1063 BTRFS_SETGET_FUNCS(inode_flags
, struct btrfs_inode_item
, flags
, 16);
1064 BTRFS_SETGET_FUNCS(inode_compat_flags
, struct btrfs_inode_item
,
1067 static inline struct btrfs_timespec
*
1068 btrfs_inode_atime(struct btrfs_inode_item
*inode_item
)
1070 unsigned long ptr
= (unsigned long)inode_item
;
1071 ptr
+= offsetof(struct btrfs_inode_item
, atime
);
1072 return (struct btrfs_timespec
*)ptr
;
1075 static inline struct btrfs_timespec
*
1076 btrfs_inode_mtime(struct btrfs_inode_item
*inode_item
)
1078 unsigned long ptr
= (unsigned long)inode_item
;
1079 ptr
+= offsetof(struct btrfs_inode_item
, mtime
);
1080 return (struct btrfs_timespec
*)ptr
;
1083 static inline struct btrfs_timespec
*
1084 btrfs_inode_ctime(struct btrfs_inode_item
*inode_item
)
1086 unsigned long ptr
= (unsigned long)inode_item
;
1087 ptr
+= offsetof(struct btrfs_inode_item
, ctime
);
1088 return (struct btrfs_timespec
*)ptr
;
1091 static inline struct btrfs_timespec
*
1092 btrfs_inode_otime(struct btrfs_inode_item
*inode_item
)
1094 unsigned long ptr
= (unsigned long)inode_item
;
1095 ptr
+= offsetof(struct btrfs_inode_item
, otime
);
1096 return (struct btrfs_timespec
*)ptr
;
1099 BTRFS_SETGET_FUNCS(timespec_sec
, struct btrfs_timespec
, sec
, 64);
1100 BTRFS_SETGET_FUNCS(timespec_nsec
, struct btrfs_timespec
, nsec
, 32);
1102 /* struct btrfs_dev_extent */
1103 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree
, struct btrfs_dev_extent
,
1105 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid
, struct btrfs_dev_extent
,
1106 chunk_objectid
, 64);
1107 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset
, struct btrfs_dev_extent
,
1109 BTRFS_SETGET_FUNCS(dev_extent_length
, struct btrfs_dev_extent
, length
, 64);
1111 static inline u8
*btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent
*dev
)
1113 unsigned long ptr
= offsetof(struct btrfs_dev_extent
, chunk_tree_uuid
);
1114 return (u8
*)((unsigned long)dev
+ ptr
);
1117 /* struct btrfs_extent_ref */
1118 BTRFS_SETGET_FUNCS(ref_root
, struct btrfs_extent_ref
, root
, 64);
1119 BTRFS_SETGET_FUNCS(ref_generation
, struct btrfs_extent_ref
, generation
, 64);
1120 BTRFS_SETGET_FUNCS(ref_objectid
, struct btrfs_extent_ref
, objectid
, 64);
1121 BTRFS_SETGET_FUNCS(ref_num_refs
, struct btrfs_extent_ref
, num_refs
, 32);
1123 BTRFS_SETGET_STACK_FUNCS(stack_ref_root
, struct btrfs_extent_ref
, root
, 64);
1124 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation
, struct btrfs_extent_ref
,
1126 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid
, struct btrfs_extent_ref
,
1128 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs
, struct btrfs_extent_ref
,
1131 /* struct btrfs_extent_item */
1132 BTRFS_SETGET_FUNCS(extent_refs
, struct btrfs_extent_item
, refs
, 32);
1133 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs
, struct btrfs_extent_item
,
1136 /* struct btrfs_node */
1137 BTRFS_SETGET_FUNCS(key_blockptr
, struct btrfs_key_ptr
, blockptr
, 64);
1138 BTRFS_SETGET_FUNCS(key_generation
, struct btrfs_key_ptr
, generation
, 64);
1140 static inline u64
btrfs_node_blockptr(struct extent_buffer
*eb
, int nr
)
1143 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1144 sizeof(struct btrfs_key_ptr
) * nr
;
1145 return btrfs_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
);
1148 static inline void btrfs_set_node_blockptr(struct extent_buffer
*eb
,
1152 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1153 sizeof(struct btrfs_key_ptr
) * nr
;
1154 btrfs_set_key_blockptr(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1157 static inline u64
btrfs_node_ptr_generation(struct extent_buffer
*eb
, int nr
)
1160 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1161 sizeof(struct btrfs_key_ptr
) * nr
;
1162 return btrfs_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
);
1165 static inline void btrfs_set_node_ptr_generation(struct extent_buffer
*eb
,
1169 ptr
= offsetof(struct btrfs_node
, ptrs
) +
1170 sizeof(struct btrfs_key_ptr
) * nr
;
1171 btrfs_set_key_generation(eb
, (struct btrfs_key_ptr
*)ptr
, val
);
1174 static inline unsigned long btrfs_node_key_ptr_offset(int nr
)
1176 return offsetof(struct btrfs_node
, ptrs
) +
1177 sizeof(struct btrfs_key_ptr
) * nr
;
1180 void btrfs_node_key(struct extent_buffer
*eb
,
1181 struct btrfs_disk_key
*disk_key
, int nr
);
1183 static inline void btrfs_set_node_key(struct extent_buffer
*eb
,
1184 struct btrfs_disk_key
*disk_key
, int nr
)
1187 ptr
= btrfs_node_key_ptr_offset(nr
);
1188 write_eb_member(eb
, (struct btrfs_key_ptr
*)ptr
,
1189 struct btrfs_key_ptr
, key
, disk_key
);
1192 /* struct btrfs_item */
1193 BTRFS_SETGET_FUNCS(item_offset
, struct btrfs_item
, offset
, 32);
1194 BTRFS_SETGET_FUNCS(item_size
, struct btrfs_item
, size
, 32);
1196 static inline unsigned long btrfs_item_nr_offset(int nr
)
1198 return offsetof(struct btrfs_leaf
, items
) +
1199 sizeof(struct btrfs_item
) * nr
;
1202 static inline struct btrfs_item
*btrfs_item_nr(struct extent_buffer
*eb
,
1205 return (struct btrfs_item
*)btrfs_item_nr_offset(nr
);
1208 static inline u32
btrfs_item_end(struct extent_buffer
*eb
,
1209 struct btrfs_item
*item
)
1211 return btrfs_item_offset(eb
, item
) + btrfs_item_size(eb
, item
);
1214 static inline u32
btrfs_item_end_nr(struct extent_buffer
*eb
, int nr
)
1216 return btrfs_item_end(eb
, btrfs_item_nr(eb
, nr
));
1219 static inline u32
btrfs_item_offset_nr(struct extent_buffer
*eb
, int nr
)
1221 return btrfs_item_offset(eb
, btrfs_item_nr(eb
, nr
));
1224 static inline u32
btrfs_item_size_nr(struct extent_buffer
*eb
, int nr
)
1226 return btrfs_item_size(eb
, btrfs_item_nr(eb
, nr
));
1229 static inline void btrfs_item_key(struct extent_buffer
*eb
,
1230 struct btrfs_disk_key
*disk_key
, int nr
)
1232 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1233 read_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1236 static inline void btrfs_set_item_key(struct extent_buffer
*eb
,
1237 struct btrfs_disk_key
*disk_key
, int nr
)
1239 struct btrfs_item
*item
= btrfs_item_nr(eb
, nr
);
1240 write_eb_member(eb
, item
, struct btrfs_item
, key
, disk_key
);
1243 BTRFS_SETGET_FUNCS(dir_log_end
, struct btrfs_dir_log_item
, end
, 64);
1245 /* struct btrfs_dir_item */
1246 BTRFS_SETGET_FUNCS(dir_data_len
, struct btrfs_dir_item
, data_len
, 16);
1247 BTRFS_SETGET_FUNCS(dir_type
, struct btrfs_dir_item
, type
, 8);
1248 BTRFS_SETGET_FUNCS(dir_name_len
, struct btrfs_dir_item
, name_len
, 16);
1249 BTRFS_SETGET_FUNCS(dir_transid
, struct btrfs_dir_item
, transid
, 64);
1251 static inline void btrfs_dir_item_key(struct extent_buffer
*eb
,
1252 struct btrfs_dir_item
*item
,
1253 struct btrfs_disk_key
*key
)
1255 read_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1258 static inline void btrfs_set_dir_item_key(struct extent_buffer
*eb
,
1259 struct btrfs_dir_item
*item
,
1260 struct btrfs_disk_key
*key
)
1262 write_eb_member(eb
, item
, struct btrfs_dir_item
, location
, key
);
1265 /* struct btrfs_disk_key */
1266 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid
, struct btrfs_disk_key
,
1268 BTRFS_SETGET_STACK_FUNCS(disk_key_offset
, struct btrfs_disk_key
, offset
, 64);
1269 BTRFS_SETGET_STACK_FUNCS(disk_key_type
, struct btrfs_disk_key
, type
, 8);
1271 static inline void btrfs_disk_key_to_cpu(struct btrfs_key
*cpu
,
1272 struct btrfs_disk_key
*disk
)
1274 cpu
->offset
= le64_to_cpu(disk
->offset
);
1275 cpu
->type
= disk
->type
;
1276 cpu
->objectid
= le64_to_cpu(disk
->objectid
);
1279 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key
*disk
,
1280 struct btrfs_key
*cpu
)
1282 disk
->offset
= cpu_to_le64(cpu
->offset
);
1283 disk
->type
= cpu
->type
;
1284 disk
->objectid
= cpu_to_le64(cpu
->objectid
);
1287 static inline void btrfs_node_key_to_cpu(struct extent_buffer
*eb
,
1288 struct btrfs_key
*key
, int nr
)
1290 struct btrfs_disk_key disk_key
;
1291 btrfs_node_key(eb
, &disk_key
, nr
);
1292 btrfs_disk_key_to_cpu(key
, &disk_key
);
1295 static inline void btrfs_item_key_to_cpu(struct extent_buffer
*eb
,
1296 struct btrfs_key
*key
, int nr
)
1298 struct btrfs_disk_key disk_key
;
1299 btrfs_item_key(eb
, &disk_key
, nr
);
1300 btrfs_disk_key_to_cpu(key
, &disk_key
);
1303 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer
*eb
,
1304 struct btrfs_dir_item
*item
,
1305 struct btrfs_key
*key
)
1307 struct btrfs_disk_key disk_key
;
1308 btrfs_dir_item_key(eb
, item
, &disk_key
);
1309 btrfs_disk_key_to_cpu(key
, &disk_key
);
1313 static inline u8
btrfs_key_type(struct btrfs_key
*key
)
1318 static inline void btrfs_set_key_type(struct btrfs_key
*key
, u8 val
)
1323 /* struct btrfs_header */
1324 BTRFS_SETGET_HEADER_FUNCS(header_bytenr
, struct btrfs_header
, bytenr
, 64);
1325 BTRFS_SETGET_HEADER_FUNCS(header_generation
, struct btrfs_header
,
1327 BTRFS_SETGET_HEADER_FUNCS(header_owner
, struct btrfs_header
, owner
, 64);
1328 BTRFS_SETGET_HEADER_FUNCS(header_nritems
, struct btrfs_header
, nritems
, 32);
1329 BTRFS_SETGET_HEADER_FUNCS(header_flags
, struct btrfs_header
, flags
, 64);
1330 BTRFS_SETGET_HEADER_FUNCS(header_level
, struct btrfs_header
, level
, 8);
1332 static inline int btrfs_header_flag(struct extent_buffer
*eb
, u64 flag
)
1334 return (btrfs_header_flags(eb
) & flag
) == flag
;
1337 static inline int btrfs_set_header_flag(struct extent_buffer
*eb
, u64 flag
)
1339 u64 flags
= btrfs_header_flags(eb
);
1340 btrfs_set_header_flags(eb
, flags
| flag
);
1341 return (flags
& flag
) == flag
;
1344 static inline int btrfs_clear_header_flag(struct extent_buffer
*eb
, u64 flag
)
1346 u64 flags
= btrfs_header_flags(eb
);
1347 btrfs_set_header_flags(eb
, flags
& ~flag
);
1348 return (flags
& flag
) == flag
;
1351 static inline u8
*btrfs_header_fsid(struct extent_buffer
*eb
)
1353 unsigned long ptr
= offsetof(struct btrfs_header
, fsid
);
1357 static inline u8
*btrfs_header_chunk_tree_uuid(struct extent_buffer
*eb
)
1359 unsigned long ptr
= offsetof(struct btrfs_header
, chunk_tree_uuid
);
1363 static inline u8
*btrfs_super_fsid(struct extent_buffer
*eb
)
1365 unsigned long ptr
= offsetof(struct btrfs_super_block
, fsid
);
1369 static inline u8
*btrfs_header_csum(struct extent_buffer
*eb
)
1371 unsigned long ptr
= offsetof(struct btrfs_header
, csum
);
1375 static inline struct btrfs_node
*btrfs_buffer_node(struct extent_buffer
*eb
)
1380 static inline struct btrfs_leaf
*btrfs_buffer_leaf(struct extent_buffer
*eb
)
1385 static inline struct btrfs_header
*btrfs_buffer_header(struct extent_buffer
*eb
)
1390 static inline int btrfs_is_leaf(struct extent_buffer
*eb
)
1392 return (btrfs_header_level(eb
) == 0);
1395 /* struct btrfs_root_item */
1396 BTRFS_SETGET_FUNCS(disk_root_refs
, struct btrfs_root_item
, refs
, 32);
1397 BTRFS_SETGET_FUNCS(disk_root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1398 BTRFS_SETGET_FUNCS(disk_root_level
, struct btrfs_root_item
, level
, 8);
1400 BTRFS_SETGET_STACK_FUNCS(root_bytenr
, struct btrfs_root_item
, bytenr
, 64);
1401 BTRFS_SETGET_STACK_FUNCS(root_level
, struct btrfs_root_item
, level
, 8);
1402 BTRFS_SETGET_STACK_FUNCS(root_dirid
, struct btrfs_root_item
, root_dirid
, 64);
1403 BTRFS_SETGET_STACK_FUNCS(root_refs
, struct btrfs_root_item
, refs
, 32);
1404 BTRFS_SETGET_STACK_FUNCS(root_flags
, struct btrfs_root_item
, flags
, 32);
1405 BTRFS_SETGET_STACK_FUNCS(root_used
, struct btrfs_root_item
, bytes_used
, 64);
1406 BTRFS_SETGET_STACK_FUNCS(root_limit
, struct btrfs_root_item
, byte_limit
, 64);
1408 /* struct btrfs_super_block */
1409 BTRFS_SETGET_STACK_FUNCS(super_bytenr
, struct btrfs_super_block
, bytenr
, 64);
1410 BTRFS_SETGET_STACK_FUNCS(super_flags
, struct btrfs_super_block
, flags
, 64);
1411 BTRFS_SETGET_STACK_FUNCS(super_generation
, struct btrfs_super_block
,
1413 BTRFS_SETGET_STACK_FUNCS(super_root
, struct btrfs_super_block
, root
, 64);
1414 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size
,
1415 struct btrfs_super_block
, sys_chunk_array_size
, 32);
1416 BTRFS_SETGET_STACK_FUNCS(super_root_level
, struct btrfs_super_block
,
1418 BTRFS_SETGET_STACK_FUNCS(super_chunk_root
, struct btrfs_super_block
,
1420 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level
, struct btrfs_super_block
,
1421 chunk_root_level
, 8);
1422 BTRFS_SETGET_STACK_FUNCS(super_log_root
, struct btrfs_super_block
,
1424 BTRFS_SETGET_STACK_FUNCS(super_log_root_level
, struct btrfs_super_block
,
1426 BTRFS_SETGET_STACK_FUNCS(super_total_bytes
, struct btrfs_super_block
,
1428 BTRFS_SETGET_STACK_FUNCS(super_bytes_used
, struct btrfs_super_block
,
1430 BTRFS_SETGET_STACK_FUNCS(super_sectorsize
, struct btrfs_super_block
,
1432 BTRFS_SETGET_STACK_FUNCS(super_nodesize
, struct btrfs_super_block
,
1434 BTRFS_SETGET_STACK_FUNCS(super_leafsize
, struct btrfs_super_block
,
1436 BTRFS_SETGET_STACK_FUNCS(super_stripesize
, struct btrfs_super_block
,
1438 BTRFS_SETGET_STACK_FUNCS(super_root_dir
, struct btrfs_super_block
,
1439 root_dir_objectid
, 64);
1440 BTRFS_SETGET_STACK_FUNCS(super_num_devices
, struct btrfs_super_block
,
1443 static inline unsigned long btrfs_leaf_data(struct extent_buffer
*l
)
1445 return offsetof(struct btrfs_leaf
, items
);
1448 /* struct btrfs_file_extent_item */
1449 BTRFS_SETGET_FUNCS(file_extent_type
, struct btrfs_file_extent_item
, type
, 8);
1451 static inline unsigned long btrfs_file_extent_inline_start(struct
1452 btrfs_file_extent_item
*e
)
1454 unsigned long offset
= (unsigned long)e
;
1455 offset
+= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1459 static inline u32
btrfs_file_extent_calc_inline_size(u32 datasize
)
1461 return offsetof(struct btrfs_file_extent_item
, disk_bytenr
) + datasize
;
1464 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr
, struct btrfs_file_extent_item
,
1466 BTRFS_SETGET_FUNCS(file_extent_generation
, struct btrfs_file_extent_item
,
1468 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes
, struct btrfs_file_extent_item
,
1469 disk_num_bytes
, 64);
1470 BTRFS_SETGET_FUNCS(file_extent_offset
, struct btrfs_file_extent_item
,
1472 BTRFS_SETGET_FUNCS(file_extent_num_bytes
, struct btrfs_file_extent_item
,
1474 BTRFS_SETGET_FUNCS(file_extent_ram_bytes
, struct btrfs_file_extent_item
,
1476 BTRFS_SETGET_FUNCS(file_extent_compression
, struct btrfs_file_extent_item
,
1478 BTRFS_SETGET_FUNCS(file_extent_encryption
, struct btrfs_file_extent_item
,
1480 BTRFS_SETGET_FUNCS(file_extent_other_encoding
, struct btrfs_file_extent_item
,
1481 other_encoding
, 16);
1483 /* this returns the number of file bytes represented by the inline item.
1484 * If an item is compressed, this is the uncompressed size
1486 static inline u32
btrfs_file_extent_inline_len(struct extent_buffer
*eb
,
1487 struct btrfs_file_extent_item
*e
)
1489 return btrfs_file_extent_ram_bytes(eb
, e
);
1493 * this returns the number of bytes used by the item on disk, minus the
1494 * size of any extent headers. If a file is compressed on disk, this is
1495 * the compressed size
1497 static inline u32
btrfs_file_extent_inline_item_len(struct extent_buffer
*eb
,
1498 struct btrfs_item
*e
)
1500 unsigned long offset
;
1501 offset
= offsetof(struct btrfs_file_extent_item
, disk_bytenr
);
1502 return btrfs_item_size(eb
, e
) - offset
;
1505 static inline struct btrfs_root
*btrfs_sb(struct super_block
*sb
)
1507 return sb
->s_fs_info
;
1510 static inline int btrfs_set_root_name(struct btrfs_root
*root
,
1511 const char *name
, int len
)
1513 /* if we already have a name just free it */
1517 root
->name
= kmalloc(len
+1, GFP_KERNEL
);
1521 memcpy(root
->name
, name
, len
);
1522 root
->name
[len
] ='\0';
1527 static inline u32
btrfs_level_size(struct btrfs_root
*root
, int level
) {
1529 return root
->leafsize
;
1530 return root
->nodesize
;
1533 /* helper function to cast into the data area of the leaf. */
1534 #define btrfs_item_ptr(leaf, slot, type) \
1535 ((type *)(btrfs_leaf_data(leaf) + \
1536 btrfs_item_offset_nr(leaf, slot)))
1538 #define btrfs_item_ptr_offset(leaf, slot) \
1539 ((unsigned long)(btrfs_leaf_data(leaf) + \
1540 btrfs_item_offset_nr(leaf, slot)))
1542 static inline struct dentry
*fdentry(struct file
*file
)
1544 return file
->f_path
.dentry
;
1548 int btrfs_lookup_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1549 int btrfs_lookup_extent_ref(struct btrfs_trans_handle
*trans
,
1550 struct btrfs_root
*root
, u64 bytenr
,
1551 u64 num_bytes
, u32
*refs
);
1552 int btrfs_update_pinned_extents(struct btrfs_root
*root
,
1553 u64 bytenr
, u64 num
, int pin
);
1554 int btrfs_drop_leaf_ref(struct btrfs_trans_handle
*trans
,
1555 struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1556 int btrfs_cross_ref_exists(struct btrfs_trans_handle
*trans
,
1557 struct btrfs_root
*root
,
1558 struct btrfs_key
*key
, u64 bytenr
);
1559 int btrfs_extent_post_op(struct btrfs_trans_handle
*trans
,
1560 struct btrfs_root
*root
);
1561 int btrfs_copy_pinned(struct btrfs_root
*root
, struct extent_io_tree
*copy
);
1562 struct btrfs_block_group_cache
*btrfs_lookup_block_group(struct
1563 btrfs_fs_info
*info
,
1565 struct btrfs_block_group_cache
*btrfs_find_block_group(struct btrfs_root
*root
,
1566 struct btrfs_block_group_cache
1567 *hint
, u64 search_start
,
1568 int data
, int owner
);
1569 struct extent_buffer
*btrfs_alloc_free_block(struct btrfs_trans_handle
*trans
,
1570 struct btrfs_root
*root
,
1571 u32 blocksize
, u64 parent
,
1577 struct extent_buffer
*btrfs_init_new_buffer(struct btrfs_trans_handle
*trans
,
1578 struct btrfs_root
*root
,
1579 u64 bytenr
, u32 blocksize
);
1580 int btrfs_alloc_extent(struct btrfs_trans_handle
*trans
,
1581 struct btrfs_root
*root
,
1582 u64 num_bytes
, u64 parent
, u64 min_bytes
,
1583 u64 root_objectid
, u64 ref_generation
,
1584 u64 owner
, u64 empty_size
, u64 hint_byte
,
1585 u64 search_end
, struct btrfs_key
*ins
, u64 data
);
1586 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle
*trans
,
1587 struct btrfs_root
*root
, u64 parent
,
1588 u64 root_objectid
, u64 ref_generation
,
1589 u64 owner
, struct btrfs_key
*ins
);
1590 int btrfs_alloc_logged_extent(struct btrfs_trans_handle
*trans
,
1591 struct btrfs_root
*root
, u64 parent
,
1592 u64 root_objectid
, u64 ref_generation
,
1593 u64 owner
, struct btrfs_key
*ins
);
1594 int btrfs_reserve_extent(struct btrfs_trans_handle
*trans
,
1595 struct btrfs_root
*root
,
1596 u64 num_bytes
, u64 min_alloc_size
,
1597 u64 empty_size
, u64 hint_byte
,
1598 u64 search_end
, struct btrfs_key
*ins
,
1600 int btrfs_inc_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1601 struct extent_buffer
*orig_buf
, struct extent_buffer
*buf
,
1603 int btrfs_cache_ref(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1604 struct extent_buffer
*buf
, u32 nr_extents
);
1605 int btrfs_update_ref(struct btrfs_trans_handle
*trans
,
1606 struct btrfs_root
*root
, struct extent_buffer
*orig_buf
,
1607 struct extent_buffer
*buf
, int start_slot
, int nr
);
1608 int btrfs_free_extent(struct btrfs_trans_handle
*trans
,
1609 struct btrfs_root
*root
,
1610 u64 bytenr
, u64 num_bytes
, u64 parent
,
1611 u64 root_objectid
, u64 ref_generation
,
1612 u64 owner_objectid
, int pin
);
1613 int btrfs_free_reserved_extent(struct btrfs_root
*root
, u64 start
, u64 len
);
1614 int btrfs_finish_extent_commit(struct btrfs_trans_handle
*trans
,
1615 struct btrfs_root
*root
,
1616 struct extent_io_tree
*unpin
);
1617 int btrfs_inc_extent_ref(struct btrfs_trans_handle
*trans
,
1618 struct btrfs_root
*root
,
1619 u64 bytenr
, u64 num_bytes
, u64 parent
,
1620 u64 root_objectid
, u64 ref_generation
,
1621 u64 owner_objectid
);
1622 int btrfs_update_extent_ref(struct btrfs_trans_handle
*trans
,
1623 struct btrfs_root
*root
, u64 bytenr
,
1624 u64 orig_parent
, u64 parent
,
1625 u64 root_objectid
, u64 ref_generation
,
1626 u64 owner_objectid
);
1627 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle
*trans
,
1628 struct btrfs_root
*root
);
1629 int btrfs_free_block_groups(struct btrfs_fs_info
*info
);
1630 int btrfs_read_block_groups(struct btrfs_root
*root
);
1631 int btrfs_make_block_group(struct btrfs_trans_handle
*trans
,
1632 struct btrfs_root
*root
, u64 bytes_used
,
1633 u64 type
, u64 chunk_objectid
, u64 chunk_offset
,
1635 int btrfs_remove_block_group(struct btrfs_trans_handle
*trans
,
1636 struct btrfs_root
*root
, u64 group_start
);
1637 int btrfs_relocate_block_group(struct btrfs_root
*root
, u64 group_start
);
1638 int btrfs_free_reloc_root(struct btrfs_trans_handle
*trans
,
1639 struct btrfs_root
*root
);
1640 int btrfs_drop_dead_reloc_roots(struct btrfs_root
*root
);
1641 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle
*trans
,
1642 struct btrfs_root
*root
,
1643 struct extent_buffer
*buf
, u64 orig_start
);
1644 int btrfs_add_dead_reloc_root(struct btrfs_root
*root
);
1645 int btrfs_cleanup_reloc_trees(struct btrfs_root
*root
);
1647 int btrfs_previous_item(struct btrfs_root
*root
,
1648 struct btrfs_path
*path
, u64 min_objectid
,
1650 int btrfs_merge_path(struct btrfs_trans_handle
*trans
,
1651 struct btrfs_root
*root
,
1652 struct btrfs_key
*node_keys
,
1653 u64
*nodes
, int lowest_level
);
1654 int btrfs_set_item_key_safe(struct btrfs_trans_handle
*trans
,
1655 struct btrfs_root
*root
, struct btrfs_path
*path
,
1656 struct btrfs_key
*new_key
);
1657 struct extent_buffer
*btrfs_root_node(struct btrfs_root
*root
);
1658 struct extent_buffer
*btrfs_lock_root_node(struct btrfs_root
*root
);
1659 int btrfs_find_next_key(struct btrfs_root
*root
, struct btrfs_path
*path
,
1660 struct btrfs_key
*key
, int lowest_level
,
1661 int cache_only
, u64 min_trans
);
1662 int btrfs_search_forward(struct btrfs_root
*root
, struct btrfs_key
*min_key
,
1663 struct btrfs_key
*max_key
,
1664 struct btrfs_path
*path
, int cache_only
,
1666 int btrfs_cow_block(struct btrfs_trans_handle
*trans
,
1667 struct btrfs_root
*root
, struct extent_buffer
*buf
,
1668 struct extent_buffer
*parent
, int parent_slot
,
1669 struct extent_buffer
**cow_ret
, u64 prealloc_dest
);
1670 int btrfs_copy_root(struct btrfs_trans_handle
*trans
,
1671 struct btrfs_root
*root
,
1672 struct extent_buffer
*buf
,
1673 struct extent_buffer
**cow_ret
, u64 new_root_objectid
);
1674 int btrfs_extend_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1675 *root
, struct btrfs_path
*path
, u32 data_size
);
1676 int btrfs_truncate_item(struct btrfs_trans_handle
*trans
,
1677 struct btrfs_root
*root
,
1678 struct btrfs_path
*path
,
1679 u32 new_size
, int from_end
);
1680 int btrfs_search_slot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1681 *root
, struct btrfs_key
*key
, struct btrfs_path
*p
, int
1683 int btrfs_realloc_node(struct btrfs_trans_handle
*trans
,
1684 struct btrfs_root
*root
, struct extent_buffer
*parent
,
1685 int start_slot
, int cache_only
, u64
*last_ret
,
1686 struct btrfs_key
*progress
);
1687 void btrfs_release_path(struct btrfs_root
*root
, struct btrfs_path
*p
);
1688 struct btrfs_path
*btrfs_alloc_path(void);
1689 void btrfs_free_path(struct btrfs_path
*p
);
1690 void btrfs_init_path(struct btrfs_path
*p
);
1691 int btrfs_del_items(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1692 struct btrfs_path
*path
, int slot
, int nr
);
1693 int btrfs_del_leaf(struct btrfs_trans_handle
*trans
,
1694 struct btrfs_root
*root
,
1695 struct btrfs_path
*path
, u64 bytenr
);
1696 static inline int btrfs_del_item(struct btrfs_trans_handle
*trans
,
1697 struct btrfs_root
*root
,
1698 struct btrfs_path
*path
)
1700 return btrfs_del_items(trans
, root
, path
, path
->slots
[0], 1);
1703 int btrfs_insert_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1704 *root
, struct btrfs_key
*key
, void *data
, u32 data_size
);
1705 int btrfs_insert_empty_items(struct btrfs_trans_handle
*trans
,
1706 struct btrfs_root
*root
,
1707 struct btrfs_path
*path
,
1708 struct btrfs_key
*cpu_key
, u32
*data_size
, int nr
);
1710 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle
*trans
,
1711 struct btrfs_root
*root
,
1712 struct btrfs_path
*path
,
1713 struct btrfs_key
*key
,
1716 return btrfs_insert_empty_items(trans
, root
, path
, key
, &data_size
, 1);
1719 int btrfs_next_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1720 int btrfs_prev_leaf(struct btrfs_root
*root
, struct btrfs_path
*path
);
1721 int btrfs_leaf_free_space(struct btrfs_root
*root
, struct extent_buffer
*leaf
);
1722 int btrfs_drop_snapshot(struct btrfs_trans_handle
*trans
, struct btrfs_root
1724 int btrfs_drop_subtree(struct btrfs_trans_handle
*trans
,
1725 struct btrfs_root
*root
,
1726 struct extent_buffer
*node
,
1727 struct extent_buffer
*parent
);
1729 int btrfs_del_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
*root
,
1730 struct btrfs_key
*key
);
1731 int btrfs_insert_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1732 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1734 int btrfs_update_root(struct btrfs_trans_handle
*trans
, struct btrfs_root
1735 *root
, struct btrfs_key
*key
, struct btrfs_root_item
1737 int btrfs_find_last_root(struct btrfs_root
*root
, u64 objectid
, struct
1738 btrfs_root_item
*item
, struct btrfs_key
*key
);
1739 int btrfs_search_root(struct btrfs_root
*root
, u64 search_start
,
1740 u64
*found_objectid
);
1741 int btrfs_find_dead_roots(struct btrfs_root
*root
, u64 objectid
,
1742 struct btrfs_root
*latest_root
);
1744 int btrfs_insert_dir_item(struct btrfs_trans_handle
*trans
, struct btrfs_root
1745 *root
, const char *name
, int name_len
, u64 dir
,
1746 struct btrfs_key
*location
, u8 type
, u64 index
);
1747 struct btrfs_dir_item
*btrfs_lookup_dir_item(struct btrfs_trans_handle
*trans
,
1748 struct btrfs_root
*root
,
1749 struct btrfs_path
*path
, u64 dir
,
1750 const char *name
, int name_len
,
1752 struct btrfs_dir_item
*
1753 btrfs_lookup_dir_index_item(struct btrfs_trans_handle
*trans
,
1754 struct btrfs_root
*root
,
1755 struct btrfs_path
*path
, u64 dir
,
1756 u64 objectid
, const char *name
, int name_len
,
1758 struct btrfs_dir_item
*btrfs_match_dir_item_name(struct btrfs_root
*root
,
1759 struct btrfs_path
*path
,
1760 const char *name
, int name_len
);
1761 int btrfs_delete_one_dir_name(struct btrfs_trans_handle
*trans
,
1762 struct btrfs_root
*root
,
1763 struct btrfs_path
*path
,
1764 struct btrfs_dir_item
*di
);
1765 int btrfs_insert_xattr_item(struct btrfs_trans_handle
*trans
,
1766 struct btrfs_root
*root
, const char *name
,
1767 u16 name_len
, const void *data
, u16 data_len
,
1769 struct btrfs_dir_item
*btrfs_lookup_xattr(struct btrfs_trans_handle
*trans
,
1770 struct btrfs_root
*root
,
1771 struct btrfs_path
*path
, u64 dir
,
1772 const char *name
, u16 name_len
,
1776 int btrfs_insert_orphan_item(struct btrfs_trans_handle
*trans
,
1777 struct btrfs_root
*root
, u64 offset
);
1778 int btrfs_del_orphan_item(struct btrfs_trans_handle
*trans
,
1779 struct btrfs_root
*root
, u64 offset
);
1782 int btrfs_find_free_objectid(struct btrfs_trans_handle
*trans
,
1783 struct btrfs_root
*fs_root
,
1784 u64 dirid
, u64
*objectid
);
1785 int btrfs_find_highest_inode(struct btrfs_root
*fs_root
, u64
*objectid
);
1788 int btrfs_insert_inode_ref(struct btrfs_trans_handle
*trans
,
1789 struct btrfs_root
*root
,
1790 const char *name
, int name_len
,
1791 u64 inode_objectid
, u64 ref_objectid
, u64 index
);
1792 int btrfs_del_inode_ref(struct btrfs_trans_handle
*trans
,
1793 struct btrfs_root
*root
,
1794 const char *name
, int name_len
,
1795 u64 inode_objectid
, u64 ref_objectid
, u64
*index
);
1796 int btrfs_insert_empty_inode(struct btrfs_trans_handle
*trans
,
1797 struct btrfs_root
*root
,
1798 struct btrfs_path
*path
, u64 objectid
);
1799 int btrfs_lookup_inode(struct btrfs_trans_handle
*trans
, struct btrfs_root
1800 *root
, struct btrfs_path
*path
,
1801 struct btrfs_key
*location
, int mod
);
1804 int btrfs_lookup_bio_sums(struct btrfs_root
*root
, struct inode
*inode
,
1806 int btrfs_insert_file_extent(struct btrfs_trans_handle
*trans
,
1807 struct btrfs_root
*root
,
1808 u64 objectid
, u64 pos
,
1809 u64 disk_offset
, u64 disk_num_bytes
,
1810 u64 num_bytes
, u64 offset
, u64 ram_bytes
,
1811 u8 compression
, u8 encryption
, u16 other_encoding
);
1812 int btrfs_lookup_file_extent(struct btrfs_trans_handle
*trans
,
1813 struct btrfs_root
*root
,
1814 struct btrfs_path
*path
, u64 objectid
,
1815 u64 bytenr
, int mod
);
1816 int btrfs_csum_file_blocks(struct btrfs_trans_handle
*trans
,
1817 struct btrfs_root
*root
, struct inode
*inode
,
1818 struct btrfs_ordered_sum
*sums
);
1819 int btrfs_csum_one_bio(struct btrfs_root
*root
, struct inode
*inode
,
1821 int btrfs_csum_file_bytes(struct btrfs_root
*root
, struct inode
*inode
,
1822 u64 start
, unsigned long len
);
1823 struct btrfs_csum_item
*btrfs_lookup_csum(struct btrfs_trans_handle
*trans
,
1824 struct btrfs_root
*root
,
1825 struct btrfs_path
*path
,
1826 u64 objectid
, u64 offset
,
1828 int btrfs_csum_truncate(struct btrfs_trans_handle
*trans
,
1829 struct btrfs_root
*root
, struct btrfs_path
*path
,
1833 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1834 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1835 #define ClearPageChecked ClearPageFsMisc
1836 #define SetPageChecked SetPageFsMisc
1837 #define PageChecked PageFsMisc
1840 int btrfs_unlink_inode(struct btrfs_trans_handle
*trans
,
1841 struct btrfs_root
*root
,
1842 struct inode
*dir
, struct inode
*inode
,
1843 const char *name
, int name_len
);
1844 int btrfs_add_link(struct btrfs_trans_handle
*trans
,
1845 struct inode
*parent_inode
, struct inode
*inode
,
1846 const char *name
, int name_len
, int add_backref
, u64 index
);
1847 int btrfs_truncate_inode_items(struct btrfs_trans_handle
*trans
,
1848 struct btrfs_root
*root
,
1849 struct inode
*inode
, u64 new_size
,
1852 int btrfs_start_delalloc_inodes(struct btrfs_root
*root
);
1853 int btrfs_set_extent_delalloc(struct inode
*inode
, u64 start
, u64 end
);
1854 int btrfs_writepages(struct address_space
*mapping
,
1855 struct writeback_control
*wbc
);
1856 int btrfs_create_subvol_root(struct btrfs_root
*new_root
, struct dentry
*dentry
,
1857 struct btrfs_trans_handle
*trans
, u64 new_dirid
,
1858 struct btrfs_block_group_cache
*block_group
);
1860 void btrfs_invalidate_dcache_root(struct btrfs_root
*root
, char *name
,
1863 int btrfs_merge_bio_hook(struct page
*page
, unsigned long offset
,
1864 size_t size
, struct bio
*bio
, unsigned long bio_flags
);
1866 unsigned long btrfs_force_ra(struct address_space
*mapping
,
1867 struct file_ra_state
*ra
, struct file
*file
,
1868 pgoff_t offset
, pgoff_t last_index
);
1869 int btrfs_check_free_space(struct btrfs_root
*root
, u64 num_required
,
1871 int btrfs_page_mkwrite(struct vm_area_struct
*vma
, struct page
*page
);
1872 int btrfs_readpage(struct file
*file
, struct page
*page
);
1873 void btrfs_delete_inode(struct inode
*inode
);
1874 void btrfs_put_inode(struct inode
*inode
);
1875 void btrfs_read_locked_inode(struct inode
*inode
);
1876 int btrfs_write_inode(struct inode
*inode
, int wait
);
1877 void btrfs_dirty_inode(struct inode
*inode
);
1878 struct inode
*btrfs_alloc_inode(struct super_block
*sb
);
1879 void btrfs_destroy_inode(struct inode
*inode
);
1880 int btrfs_init_cachep(void);
1881 void btrfs_destroy_cachep(void);
1882 long btrfs_ioctl_trans_end(struct file
*file
);
1883 struct inode
*btrfs_ilookup(struct super_block
*s
, u64 objectid
,
1884 struct btrfs_root
*root
, int wait
);
1885 struct inode
*btrfs_iget_locked(struct super_block
*s
, u64 objectid
,
1886 struct btrfs_root
*root
);
1887 struct inode
*btrfs_iget(struct super_block
*s
, struct btrfs_key
*location
,
1888 struct btrfs_root
*root
, int *is_new
);
1889 int btrfs_commit_write(struct file
*file
, struct page
*page
,
1890 unsigned from
, unsigned to
);
1891 struct extent_map
*btrfs_get_extent(struct inode
*inode
, struct page
*page
,
1892 size_t page_offset
, u64 start
, u64 end
,
1894 int btrfs_update_inode(struct btrfs_trans_handle
*trans
,
1895 struct btrfs_root
*root
,
1896 struct inode
*inode
);
1897 int btrfs_orphan_add(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1898 int btrfs_orphan_del(struct btrfs_trans_handle
*trans
, struct inode
*inode
);
1899 void btrfs_orphan_cleanup(struct btrfs_root
*root
);
1902 long btrfs_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
1905 int btrfs_sync_file(struct file
*file
, struct dentry
*dentry
, int datasync
);
1906 int btrfs_drop_extent_cache(struct inode
*inode
, u64 start
, u64 end
,
1908 int btrfs_check_file(struct btrfs_root
*root
, struct inode
*inode
);
1909 extern struct file_operations btrfs_file_operations
;
1910 int btrfs_drop_extents(struct btrfs_trans_handle
*trans
,
1911 struct btrfs_root
*root
, struct inode
*inode
,
1912 u64 start
, u64 end
, u64 inline_limit
, u64
*hint_block
);
1913 int btrfs_release_file(struct inode
*inode
, struct file
*file
);
1916 int btrfs_defrag_leaves(struct btrfs_trans_handle
*trans
,
1917 struct btrfs_root
*root
, int cache_only
);
1920 int btrfs_init_sysfs(void);
1921 void btrfs_exit_sysfs(void);
1922 int btrfs_sysfs_add_super(struct btrfs_fs_info
*fs
);
1923 int btrfs_sysfs_add_root(struct btrfs_root
*root
);
1924 void btrfs_sysfs_del_root(struct btrfs_root
*root
);
1925 void btrfs_sysfs_del_super(struct btrfs_fs_info
*root
);
1928 ssize_t
btrfs_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
);
1931 u64
btrfs_parse_size(char *str
);
1932 int btrfs_parse_options(struct btrfs_root
*root
, char *options
);
1933 int btrfs_sync_fs(struct super_block
*sb
, int wait
);
1936 int btrfs_check_acl(struct inode
*inode
, int mask
);
1937 int btrfs_init_acl(struct inode
*inode
, struct inode
*dir
);
1938 int btrfs_acl_chmod(struct inode
*inode
);
1940 /* free-space-cache.c */
1941 int btrfs_add_free_space(struct btrfs_block_group_cache
*block_group
,
1942 u64 bytenr
, u64 size
);
1943 int btrfs_remove_free_space(struct btrfs_block_group_cache
*block_group
,
1944 u64 bytenr
, u64 size
);
1945 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1947 struct btrfs_free_space
*btrfs_find_free_space(struct btrfs_block_group_cache
1948 *block_group
, u64 offset
,
1950 void btrfs_dump_free_space(struct btrfs_block_group_cache
*block_group
,
1952 u64
btrfs_block_group_free_space(struct btrfs_block_group_cache
*block_group
);