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 "_BDRfS_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 /* expected generation for this device */
183 /* grouping information for allocation decisions */
186 /* seek speed 0-100 where 100 is fastest */
189 /* bandwidth 0-100 where 100 is fastest */
192 /* btrfs generated uuid for this device */
193 u8 uuid[BTRFS_UUID_SIZE];
195 /* uuid of FS who owns this device */
196 u8 fsid[BTRFS_UUID_SIZE];
197 } __attribute__ ((__packed__));
199 struct btrfs_stripe {
202 u8 dev_uuid[BTRFS_UUID_SIZE];
203 } __attribute__ ((__packed__));
206 /* size of this chunk in bytes */
209 /* objectid of the root referencing this chunk */
215 /* optimal io alignment for this chunk */
218 /* optimal io width for this chunk */
221 /* minimal io size for this chunk */
224 /* 2^16 stripes is quite a lot, a second limit is the size of a single
229 /* sub stripes only matter for raid10 */
231 struct btrfs_stripe stripe;
232 /* additional stripes go here */
233 } __attribute__ ((__packed__));
235 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
237 BUG_ON(num_stripes == 0);
238 return sizeof(struct btrfs_chunk) +
239 sizeof(struct btrfs_stripe) * (num_stripes - 1);
242 #define BTRFS_FSID_SIZE 16
243 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
246 * every tree block (leaf or node) starts with this header.
248 struct btrfs_header {
249 /* these first four must match the super block */
250 u8 csum[BTRFS_CSUM_SIZE];
251 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
252 __le64 bytenr; /* which block this node is supposed to live in */
255 /* allowed to be different from the super from here on down */
256 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
261 } __attribute__ ((__packed__));
263 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
264 sizeof(struct btrfs_header)) / \
265 sizeof(struct btrfs_key_ptr))
266 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
267 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
268 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
269 sizeof(struct btrfs_item) - \
270 sizeof(struct btrfs_file_extent_item))
272 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
275 * this is a very generous portion of the super block, giving us
276 * room to translate 14 chunks with 3 stripes each.
278 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
279 #define BTRFS_LABEL_SIZE 256
282 * the super block basically lists the main trees of the FS
283 * it currently lacks any block count etc etc
285 struct btrfs_super_block {
286 u8 csum[BTRFS_CSUM_SIZE];
287 /* the first 4 fields must match struct btrfs_header */
288 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
289 __le64 bytenr; /* this block number */
292 /* allowed to be different from the btrfs_header from here own down */
300 __le64 root_dir_objectid;
306 __le32 sys_chunk_array_size;
307 __le64 chunk_root_generation;
311 struct btrfs_dev_item dev_item;
312 char label[BTRFS_LABEL_SIZE];
313 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
314 } __attribute__ ((__packed__));
317 * A leaf is full of items. offset and size tell us where to find
318 * the item in the leaf (relative to the start of the data area)
321 struct btrfs_disk_key key;
324 } __attribute__ ((__packed__));
327 * leaves have an item area and a data area:
328 * [item0, item1....itemN] [free space] [dataN...data1, data0]
330 * The data is separate from the items to get the keys closer together
334 struct btrfs_header header;
335 struct btrfs_item items[];
336 } __attribute__ ((__packed__));
339 * all non-leaf blocks are nodes, they hold only keys and pointers to
342 struct btrfs_key_ptr {
343 struct btrfs_disk_key key;
346 } __attribute__ ((__packed__));
349 struct btrfs_header header;
350 struct btrfs_key_ptr ptrs[];
351 } __attribute__ ((__packed__));
354 * btrfs_paths remember the path taken from the root down to the leaf.
355 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
356 * to any other levels that are present.
358 * The slots array records the index of the item or block pointer
359 * used while walking the tree.
362 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
363 int slots[BTRFS_MAX_LEVEL];
364 /* if there is real range locking, this locks field will change */
365 int locks[BTRFS_MAX_LEVEL];
367 /* keep some upper locks as we walk down */
374 * items in the extent btree are used to record the objectid of the
375 * owner of the block and the number of references
377 struct btrfs_extent_item {
379 } __attribute__ ((__packed__));
381 struct btrfs_extent_ref {
386 } __attribute__ ((__packed__));
388 /* dev extents record free space on individual devices. The owner
389 * field points back to the chunk allocation mapping tree that allocated
390 * the extent. The chunk tree uuid field is a way to double check the owner
392 struct btrfs_dev_extent {
394 __le64 chunk_objectid;
397 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
398 } __attribute__ ((__packed__));
400 struct btrfs_inode_ref {
404 } __attribute__ ((__packed__));
406 struct btrfs_timespec {
409 } __attribute__ ((__packed__));
412 BTRFS_COMPRESS_NONE = 0,
413 BTRFS_COMPRESS_ZLIB = 1,
414 BTRFS_COMPRESS_LAST = 2,
415 } btrfs_compression_type;
417 /* we don't understand any encryption methods right now */
419 BTRFS_ENCRYPTION_NONE = 0,
420 BTRFS_ENCRYPTION_LAST = 1,
421 } btrfs_encryption_type;
423 struct btrfs_inode_item {
424 /* nfs style generation number */
426 /* transid that last touched this inode */
439 struct btrfs_timespec atime;
440 struct btrfs_timespec ctime;
441 struct btrfs_timespec mtime;
442 struct btrfs_timespec otime;
443 } __attribute__ ((__packed__));
445 struct btrfs_dir_log_item {
447 } __attribute__ ((__packed__));
449 struct btrfs_dir_item {
450 struct btrfs_disk_key location;
455 } __attribute__ ((__packed__));
457 struct btrfs_root_item {
458 struct btrfs_inode_item inode;
464 __le64 last_snapshot;
467 struct btrfs_disk_key drop_progress;
470 } __attribute__ ((__packed__));
472 #define BTRFS_FILE_EXTENT_INLINE 0
473 #define BTRFS_FILE_EXTENT_REG 1
474 #define BTRFS_FILE_EXTENT_PREALLOC 2
476 struct btrfs_file_extent_item {
478 * transaction id that created this extent
482 * max number of bytes to hold this extent in ram
483 * when we split a compressed extent we can't know how big
484 * each of the resulting pieces will be. So, this is
485 * an upper limit on the size of the extent in ram instead of
491 * 32 bits for the various ways we might encode the data,
492 * including compression and encryption. If any of these
493 * are set to something a given disk format doesn't understand
494 * it is treated like an incompat flag for reading and writing,
499 __le16 other_encoding; /* spare for later use */
501 /* are we inline data or a real extent? */
505 * disk space consumed by the extent, checksum blocks are included
509 __le64 disk_num_bytes;
511 * the logical offset in file blocks (no csums)
512 * this extent record is for. This allows a file extent to point
513 * into the middle of an existing extent on disk, sharing it
514 * between two snapshots (useful if some bytes in the middle of the
515 * extent have changed
519 * the logical number of file blocks (no csums included). This
520 * always reflects the size uncompressed and without encoding.
524 } __attribute__ ((__packed__));
526 struct btrfs_csum_item {
528 } __attribute__ ((__packed__));
530 /* different types of block groups (and chunks) */
531 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
532 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
533 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
534 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
535 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
536 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
537 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
539 struct btrfs_block_group_item {
541 __le64 chunk_objectid;
543 } __attribute__ ((__packed__));
545 struct btrfs_space_info {
554 struct list_head list;
556 /* for block groups in our same type */
557 struct list_head block_groups;
559 struct rw_semaphore groups_sem;
562 struct btrfs_free_space {
563 struct rb_node bytes_index;
564 struct rb_node offset_index;
569 struct btrfs_block_group_cache {
570 struct btrfs_key key;
571 struct btrfs_block_group_item item;
573 struct mutex alloc_mutex;
581 struct btrfs_space_info *space_info;
583 /* free space cache stuff */
584 struct rb_root free_space_bytes;
585 struct rb_root free_space_offset;
587 /* block group cache stuff */
588 struct rb_node cache_node;
590 /* for block groups in the same raid type */
591 struct list_head list;
594 struct btrfs_leaf_ref_tree {
596 struct list_head list;
601 struct btrfs_fs_devices;
602 struct btrfs_fs_info {
603 u8 fsid[BTRFS_FSID_SIZE];
604 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
605 struct btrfs_root *extent_root;
606 struct btrfs_root *tree_root;
607 struct btrfs_root *chunk_root;
608 struct btrfs_root *dev_root;
609 struct btrfs_root *fs_root;
611 /* the log root tree is a directory of all the other log roots */
612 struct btrfs_root *log_root_tree;
613 struct radix_tree_root fs_roots_radix;
615 /* block group cache stuff */
616 spinlock_t block_group_cache_lock;
617 struct rb_root block_group_cache_tree;
619 struct extent_io_tree pinned_extents;
620 struct extent_io_tree pending_del;
621 struct extent_io_tree extent_ins;
623 /* logical->physical extent mapping */
624 struct btrfs_mapping_tree mapping_tree;
627 u64 last_trans_committed;
628 u64 last_trans_new_blockgroup;
629 u64 open_ioctl_trans;
630 unsigned long mount_opt;
634 struct btrfs_transaction *running_transaction;
635 wait_queue_head_t transaction_throttle;
636 wait_queue_head_t transaction_wait;
638 wait_queue_head_t async_submit_wait;
639 wait_queue_head_t tree_log_wait;
641 struct btrfs_super_block super_copy;
642 struct btrfs_super_block super_for_commit;
643 struct block_device *__bdev;
644 struct super_block *sb;
645 struct inode *btree_inode;
646 struct backing_dev_info bdi;
647 spinlock_t hash_lock;
648 struct mutex trans_mutex;
649 struct mutex tree_log_mutex;
650 struct mutex transaction_kthread_mutex;
651 struct mutex cleaner_mutex;
652 struct mutex extent_ins_mutex;
653 struct mutex pinned_mutex;
654 struct mutex chunk_mutex;
655 struct mutex drop_mutex;
656 struct mutex volume_mutex;
657 struct mutex tree_reloc_mutex;
658 struct list_head trans_list;
659 struct list_head hashers;
660 struct list_head dead_roots;
662 atomic_t nr_async_submits;
663 atomic_t async_submit_draining;
664 atomic_t nr_async_bios;
665 atomic_t async_delalloc_pages;
666 atomic_t tree_log_writers;
667 atomic_t tree_log_commit;
668 unsigned long tree_log_batch;
669 u64 tree_log_transid;
672 * this is used by the balancing code to wait for all the pending
675 spinlock_t ordered_extent_lock;
676 struct list_head ordered_extents;
677 struct list_head delalloc_inodes;
680 * there is a pool of worker threads for checksumming during writes
681 * and a pool for checksumming after reads. This is because readers
682 * can run with FS locks held, and the writers may be waiting for
683 * those locks. We don't want ordering in the pending list to cause
684 * deadlocks, and so the two are serviced separately.
686 * A third pool does submit_bio to avoid deadlocking with the other
689 struct btrfs_workers workers;
690 struct btrfs_workers delalloc_workers;
691 struct btrfs_workers endio_workers;
692 struct btrfs_workers endio_write_workers;
693 struct btrfs_workers submit_workers;
695 * fixup workers take dirty pages that didn't properly go through
696 * the cow mechanism and make them safe to write. It happens
697 * for the sys_munmap function call path
699 struct btrfs_workers fixup_workers;
700 struct task_struct *transaction_kthread;
701 struct task_struct *cleaner_kthread;
702 int thread_pool_size;
704 /* tree relocation relocated fields */
705 struct list_head dead_reloc_roots;
706 struct btrfs_leaf_ref_tree reloc_ref_tree;
707 struct btrfs_leaf_ref_tree shared_ref_tree;
709 struct kobject super_kobj;
710 struct completion kobj_unregister;
713 int log_root_recovering;
715 atomic_t throttle_gen;
718 struct list_head dirty_cowonly_roots;
720 struct btrfs_fs_devices *fs_devices;
721 struct list_head space_info;
722 spinlock_t delalloc_lock;
723 spinlock_t new_trans_lock;
728 spinlock_t ref_cache_lock;
729 u64 total_ref_cache_size;
731 u64 avail_data_alloc_bits;
732 u64 avail_metadata_alloc_bits;
733 u64 avail_system_alloc_bits;
734 u64 data_alloc_profile;
735 u64 metadata_alloc_profile;
736 u64 system_alloc_profile;
742 * in ram representation of the tree. extent_root is used for all allocations
743 * and for the extent tree extent_root root.
745 struct btrfs_dirty_root;
747 struct extent_buffer *node;
749 /* the node lock is held while changing the node pointer */
750 spinlock_t node_lock;
752 struct extent_buffer *commit_root;
753 struct btrfs_leaf_ref_tree *ref_tree;
754 struct btrfs_leaf_ref_tree ref_tree_struct;
755 struct btrfs_dirty_root *dirty_root;
756 struct btrfs_root *log_root;
757 struct btrfs_root *reloc_root;
759 struct btrfs_root_item root_item;
760 struct btrfs_key root_key;
761 struct btrfs_fs_info *fs_info;
762 struct extent_io_tree dirty_log_pages;
764 struct kobject root_kobj;
765 struct completion kobj_unregister;
766 struct mutex objectid_mutex;
767 struct mutex log_mutex;
772 /* data allocations are done in sectorsize units */
775 /* node allocations are done in nodesize units */
778 /* leaf allocations are done in leafsize units */
785 u64 last_inode_alloc;
788 u64 defrag_trans_start;
789 struct btrfs_key defrag_progress;
790 struct btrfs_key defrag_max;
796 /* the dirty list is only used by non-reference counted roots */
797 struct list_head dirty_list;
799 spinlock_t list_lock;
800 struct list_head dead_list;
801 struct list_head orphan_list;
804 * right now this just gets used so that a root has its own devid
805 * for stat. It may be used for more later
807 struct super_block anon_super;
812 * inode items have the data typically returned from stat and store other
813 * info about object characteristics. There is one for every file and dir in
816 #define BTRFS_INODE_ITEM_KEY 1
817 #define BTRFS_INODE_REF_KEY 2
818 #define BTRFS_XATTR_ITEM_KEY 8
819 #define BTRFS_ORPHAN_ITEM_KEY 9
820 /* reserve 2-15 close to the inode for later flexibility */
823 * dir items are the name -> inode pointers in a directory. There is one
824 * for every name in a directory.
826 #define BTRFS_DIR_LOG_ITEM_KEY 14
827 #define BTRFS_DIR_LOG_INDEX_KEY 15
828 #define BTRFS_DIR_ITEM_KEY 16
829 #define BTRFS_DIR_INDEX_KEY 17
831 * extent data is for file data
833 #define BTRFS_EXTENT_DATA_KEY 18
835 * csum items have the checksums for data in the extents
837 #define BTRFS_CSUM_ITEM_KEY 19
840 /* reserve 21-31 for other file/dir stuff */
843 * root items point to tree roots. There are typically in the root
844 * tree used by the super block to find all the other trees
846 #define BTRFS_ROOT_ITEM_KEY 32
848 * extent items are in the extent map tree. These record which blocks
849 * are used, and how many references there are to each block
851 #define BTRFS_EXTENT_ITEM_KEY 33
852 #define BTRFS_EXTENT_REF_KEY 34
855 * block groups give us hints into the extent allocation trees. Which
856 * blocks are free etc etc
858 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
860 #define BTRFS_DEV_EXTENT_KEY 75
861 #define BTRFS_DEV_ITEM_KEY 76
862 #define BTRFS_CHUNK_ITEM_KEY 77
865 * string items are for debugging. They just store a short string of
868 #define BTRFS_STRING_ITEM_KEY 253
870 #define BTRFS_MOUNT_NODATASUM (1 << 0)
871 #define BTRFS_MOUNT_NODATACOW (1 << 1)
872 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
873 #define BTRFS_MOUNT_SSD (1 << 3)
874 #define BTRFS_MOUNT_DEGRADED (1 << 4)
875 #define BTRFS_MOUNT_COMPRESS (1 << 5)
877 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
878 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
879 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
884 #define BTRFS_INODE_NODATASUM (1 << 0)
885 #define BTRFS_INODE_NODATACOW (1 << 1)
886 #define BTRFS_INODE_READONLY (1 << 2)
887 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
888 #define BTRFS_INODE_PREALLOC (1 << 4)
889 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
891 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
893 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
895 /* some macros to generate set/get funcs for the struct fields. This
896 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
899 #define le8_to_cpu(v) (v)
900 #define cpu_to_le8(v) (v)
903 #define read_eb_member(eb, ptr, type, member, result) ( \
904 read_extent_buffer(eb, (char *)(result), \
905 ((unsigned long)(ptr)) + \
906 offsetof(type, member), \
907 sizeof(((type *)0)->member)))
909 #define write_eb_member(eb, ptr, type, member, result) ( \
910 write_extent_buffer(eb, (char *)(result), \
911 ((unsigned long)(ptr)) + \
912 offsetof(type, member), \
913 sizeof(((type *)0)->member)))
915 #ifndef BTRFS_SETGET_FUNCS
916 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
917 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
918 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
921 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
922 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
924 type *p = kmap_atomic(eb->first_page, KM_USER0); \
925 u##bits res = le##bits##_to_cpu(p->member); \
926 kunmap_atomic(p, KM_USER0); \
929 static inline void btrfs_set_##name(struct extent_buffer *eb, \
932 type *p = kmap_atomic(eb->first_page, KM_USER0); \
933 p->member = cpu_to_le##bits(val); \
934 kunmap_atomic(p, KM_USER0); \
937 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
938 static inline u##bits btrfs_##name(type *s) \
940 return le##bits##_to_cpu(s->member); \
942 static inline void btrfs_set_##name(type *s, u##bits val) \
944 s->member = cpu_to_le##bits(val); \
947 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
948 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
949 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
950 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
951 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
952 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
953 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
954 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
955 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
956 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
957 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
959 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
960 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
962 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
964 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
966 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
968 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
970 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
971 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
973 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
975 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
977 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
980 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
982 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
985 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
987 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
990 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
991 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
992 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
993 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
994 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
995 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
996 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
997 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
998 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
999 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1000 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1002 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1004 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1007 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1008 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1009 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1011 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1013 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1015 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1017 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1018 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1020 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1022 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1023 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1025 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1028 unsigned long offset = (unsigned long)c;
1029 offset += offsetof(struct btrfs_chunk, stripe);
1030 offset += nr * sizeof(struct btrfs_stripe);
1031 return (struct btrfs_stripe *)offset;
1034 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1036 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1039 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1040 struct btrfs_chunk *c, int nr)
1042 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1045 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1046 struct btrfs_chunk *c, int nr,
1049 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1052 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1053 struct btrfs_chunk *c, int nr)
1055 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1058 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1059 struct btrfs_chunk *c, int nr,
1062 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1065 /* struct btrfs_block_group_item */
1066 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1068 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1070 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1071 struct btrfs_block_group_item, chunk_objectid, 64);
1073 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1074 struct btrfs_block_group_item, chunk_objectid, 64);
1075 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1076 struct btrfs_block_group_item, flags, 64);
1077 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1078 struct btrfs_block_group_item, flags, 64);
1080 /* struct btrfs_inode_ref */
1081 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1082 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1084 /* struct btrfs_inode_item */
1085 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1086 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1087 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1088 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1089 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1090 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1091 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1092 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1093 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1094 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1095 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1096 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1099 static inline struct btrfs_timespec *
1100 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1102 unsigned long ptr = (unsigned long)inode_item;
1103 ptr += offsetof(struct btrfs_inode_item, atime);
1104 return (struct btrfs_timespec *)ptr;
1107 static inline struct btrfs_timespec *
1108 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1110 unsigned long ptr = (unsigned long)inode_item;
1111 ptr += offsetof(struct btrfs_inode_item, mtime);
1112 return (struct btrfs_timespec *)ptr;
1115 static inline struct btrfs_timespec *
1116 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1118 unsigned long ptr = (unsigned long)inode_item;
1119 ptr += offsetof(struct btrfs_inode_item, ctime);
1120 return (struct btrfs_timespec *)ptr;
1123 static inline struct btrfs_timespec *
1124 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1126 unsigned long ptr = (unsigned long)inode_item;
1127 ptr += offsetof(struct btrfs_inode_item, otime);
1128 return (struct btrfs_timespec *)ptr;
1131 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1132 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1134 /* struct btrfs_dev_extent */
1135 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1137 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1138 chunk_objectid, 64);
1139 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1141 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1143 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1145 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1146 return (u8 *)((unsigned long)dev + ptr);
1149 /* struct btrfs_extent_ref */
1150 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1151 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1152 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1153 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1155 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1156 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1158 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1160 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1163 /* struct btrfs_extent_item */
1164 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1165 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1168 /* struct btrfs_node */
1169 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1170 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1172 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1175 ptr = offsetof(struct btrfs_node, ptrs) +
1176 sizeof(struct btrfs_key_ptr) * nr;
1177 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1180 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1184 ptr = offsetof(struct btrfs_node, ptrs) +
1185 sizeof(struct btrfs_key_ptr) * nr;
1186 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1189 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1192 ptr = offsetof(struct btrfs_node, ptrs) +
1193 sizeof(struct btrfs_key_ptr) * nr;
1194 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1197 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1201 ptr = offsetof(struct btrfs_node, ptrs) +
1202 sizeof(struct btrfs_key_ptr) * nr;
1203 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1206 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1208 return offsetof(struct btrfs_node, ptrs) +
1209 sizeof(struct btrfs_key_ptr) * nr;
1212 void btrfs_node_key(struct extent_buffer *eb,
1213 struct btrfs_disk_key *disk_key, int nr);
1215 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1216 struct btrfs_disk_key *disk_key, int nr)
1219 ptr = btrfs_node_key_ptr_offset(nr);
1220 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1221 struct btrfs_key_ptr, key, disk_key);
1224 /* struct btrfs_item */
1225 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1226 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1228 static inline unsigned long btrfs_item_nr_offset(int nr)
1230 return offsetof(struct btrfs_leaf, items) +
1231 sizeof(struct btrfs_item) * nr;
1234 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1237 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1240 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1241 struct btrfs_item *item)
1243 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1246 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1248 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1251 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1253 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1256 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1258 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1261 static inline void btrfs_item_key(struct extent_buffer *eb,
1262 struct btrfs_disk_key *disk_key, int nr)
1264 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1265 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1268 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1269 struct btrfs_disk_key *disk_key, int nr)
1271 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1272 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1275 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1277 /* struct btrfs_dir_item */
1278 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1279 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1280 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1281 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1283 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1284 struct btrfs_dir_item *item,
1285 struct btrfs_disk_key *key)
1287 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1290 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1291 struct btrfs_dir_item *item,
1292 struct btrfs_disk_key *key)
1294 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1297 /* struct btrfs_disk_key */
1298 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1300 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1301 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1303 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1304 struct btrfs_disk_key *disk)
1306 cpu->offset = le64_to_cpu(disk->offset);
1307 cpu->type = disk->type;
1308 cpu->objectid = le64_to_cpu(disk->objectid);
1311 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1312 struct btrfs_key *cpu)
1314 disk->offset = cpu_to_le64(cpu->offset);
1315 disk->type = cpu->type;
1316 disk->objectid = cpu_to_le64(cpu->objectid);
1319 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1320 struct btrfs_key *key, int nr)
1322 struct btrfs_disk_key disk_key;
1323 btrfs_node_key(eb, &disk_key, nr);
1324 btrfs_disk_key_to_cpu(key, &disk_key);
1327 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1328 struct btrfs_key *key, int nr)
1330 struct btrfs_disk_key disk_key;
1331 btrfs_item_key(eb, &disk_key, nr);
1332 btrfs_disk_key_to_cpu(key, &disk_key);
1335 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1336 struct btrfs_dir_item *item,
1337 struct btrfs_key *key)
1339 struct btrfs_disk_key disk_key;
1340 btrfs_dir_item_key(eb, item, &disk_key);
1341 btrfs_disk_key_to_cpu(key, &disk_key);
1345 static inline u8 btrfs_key_type(struct btrfs_key *key)
1350 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1355 /* struct btrfs_header */
1356 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1357 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1359 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1360 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1361 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1362 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1364 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1366 return (btrfs_header_flags(eb) & flag) == flag;
1369 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1371 u64 flags = btrfs_header_flags(eb);
1372 btrfs_set_header_flags(eb, flags | flag);
1373 return (flags & flag) == flag;
1376 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1378 u64 flags = btrfs_header_flags(eb);
1379 btrfs_set_header_flags(eb, flags & ~flag);
1380 return (flags & flag) == flag;
1383 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1385 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1389 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1391 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1395 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1397 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1401 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1403 unsigned long ptr = offsetof(struct btrfs_header, csum);
1407 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1412 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1417 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1422 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1424 return (btrfs_header_level(eb) == 0);
1427 /* struct btrfs_root_item */
1428 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1430 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1431 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1432 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1434 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1436 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1437 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1438 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1439 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1440 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1441 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1442 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1443 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1446 /* struct btrfs_super_block */
1447 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1448 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1449 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1451 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1452 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1453 struct btrfs_super_block, sys_chunk_array_size, 32);
1454 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1455 struct btrfs_super_block, chunk_root_generation, 64);
1456 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1458 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1460 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1461 chunk_root_level, 8);
1462 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1464 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1466 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1468 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1470 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1472 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1474 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1476 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1478 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1479 root_dir_objectid, 64);
1480 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1483 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1485 return offsetof(struct btrfs_leaf, items);
1488 /* struct btrfs_file_extent_item */
1489 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1491 static inline unsigned long btrfs_file_extent_inline_start(struct
1492 btrfs_file_extent_item *e)
1494 unsigned long offset = (unsigned long)e;
1495 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1499 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1501 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1504 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1506 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1508 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1509 disk_num_bytes, 64);
1510 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1512 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1514 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1516 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1518 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1520 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1521 other_encoding, 16);
1523 /* this returns the number of file bytes represented by the inline item.
1524 * If an item is compressed, this is the uncompressed size
1526 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1527 struct btrfs_file_extent_item *e)
1529 return btrfs_file_extent_ram_bytes(eb, e);
1533 * this returns the number of bytes used by the item on disk, minus the
1534 * size of any extent headers. If a file is compressed on disk, this is
1535 * the compressed size
1537 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1538 struct btrfs_item *e)
1540 unsigned long offset;
1541 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1542 return btrfs_item_size(eb, e) - offset;
1545 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1547 return sb->s_fs_info;
1550 static inline int btrfs_set_root_name(struct btrfs_root *root,
1551 const char *name, int len)
1553 /* if we already have a name just free it */
1557 root->name = kmalloc(len+1, GFP_KERNEL);
1561 memcpy(root->name, name, len);
1562 root->name[len] ='\0';
1567 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1569 return root->leafsize;
1570 return root->nodesize;
1573 /* helper function to cast into the data area of the leaf. */
1574 #define btrfs_item_ptr(leaf, slot, type) \
1575 ((type *)(btrfs_leaf_data(leaf) + \
1576 btrfs_item_offset_nr(leaf, slot)))
1578 #define btrfs_item_ptr_offset(leaf, slot) \
1579 ((unsigned long)(btrfs_leaf_data(leaf) + \
1580 btrfs_item_offset_nr(leaf, slot)))
1582 static inline struct dentry *fdentry(struct file *file)
1584 return file->f_path.dentry;
1588 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1589 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root, u64 bytenr,
1591 u64 num_bytes, u32 *refs);
1592 int btrfs_update_pinned_extents(struct btrfs_root *root,
1593 u64 bytenr, u64 num, int pin);
1594 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1595 struct btrfs_root *root, struct extent_buffer *leaf);
1596 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1597 struct btrfs_root *root, u64 bytenr);
1598 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1599 struct btrfs_root *root);
1600 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1601 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1602 btrfs_fs_info *info,
1604 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1605 struct btrfs_block_group_cache
1606 *hint, u64 search_start,
1607 int data, int owner);
1608 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1609 struct btrfs_root *root,
1610 u32 blocksize, u64 parent,
1616 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1617 struct btrfs_root *root,
1618 u64 bytenr, u32 blocksize);
1619 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1620 struct btrfs_root *root,
1621 u64 num_bytes, u64 parent, u64 min_bytes,
1622 u64 root_objectid, u64 ref_generation,
1623 u64 owner, u64 empty_size, u64 hint_byte,
1624 u64 search_end, struct btrfs_key *ins, u64 data);
1625 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1626 struct btrfs_root *root, u64 parent,
1627 u64 root_objectid, u64 ref_generation,
1628 u64 owner, struct btrfs_key *ins);
1629 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root, u64 parent,
1631 u64 root_objectid, u64 ref_generation,
1632 u64 owner, struct btrfs_key *ins);
1633 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1634 struct btrfs_root *root,
1635 u64 num_bytes, u64 min_alloc_size,
1636 u64 empty_size, u64 hint_byte,
1637 u64 search_end, struct btrfs_key *ins,
1639 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1640 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1642 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1643 struct extent_buffer *buf, u32 nr_extents);
1644 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1645 struct btrfs_root *root, struct extent_buffer *orig_buf,
1646 struct extent_buffer *buf, int start_slot, int nr);
1647 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1648 struct btrfs_root *root,
1649 u64 bytenr, u64 num_bytes, u64 parent,
1650 u64 root_objectid, u64 ref_generation,
1651 u64 owner_objectid, int pin);
1652 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1653 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1654 struct btrfs_root *root,
1655 struct extent_io_tree *unpin);
1656 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1657 struct btrfs_root *root,
1658 u64 bytenr, u64 num_bytes, u64 parent,
1659 u64 root_objectid, u64 ref_generation,
1660 u64 owner_objectid);
1661 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1662 struct btrfs_root *root, u64 bytenr,
1663 u64 orig_parent, u64 parent,
1664 u64 root_objectid, u64 ref_generation,
1665 u64 owner_objectid);
1666 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1667 struct btrfs_root *root);
1668 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1669 int btrfs_read_block_groups(struct btrfs_root *root);
1670 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1671 struct btrfs_root *root, u64 bytes_used,
1672 u64 type, u64 chunk_objectid, u64 chunk_offset,
1674 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1675 struct btrfs_root *root, u64 group_start);
1676 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1677 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1678 struct btrfs_root *root);
1679 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1680 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1681 struct btrfs_root *root,
1682 struct extent_buffer *buf, u64 orig_start);
1683 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1684 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1685 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1687 int btrfs_previous_item(struct btrfs_root *root,
1688 struct btrfs_path *path, u64 min_objectid,
1690 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1691 struct btrfs_root *root,
1692 struct btrfs_key *node_keys,
1693 u64 *nodes, int lowest_level);
1694 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1695 struct btrfs_root *root, struct btrfs_path *path,
1696 struct btrfs_key *new_key);
1697 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1698 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1699 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1700 struct btrfs_key *key, int lowest_level,
1701 int cache_only, u64 min_trans);
1702 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1703 struct btrfs_key *max_key,
1704 struct btrfs_path *path, int cache_only,
1706 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1707 struct btrfs_root *root, struct extent_buffer *buf,
1708 struct extent_buffer *parent, int parent_slot,
1709 struct extent_buffer **cow_ret, u64 prealloc_dest);
1710 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root,
1712 struct extent_buffer *buf,
1713 struct extent_buffer **cow_ret, u64 new_root_objectid);
1714 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1715 *root, struct btrfs_path *path, u32 data_size);
1716 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1717 struct btrfs_root *root,
1718 struct btrfs_path *path,
1719 u32 new_size, int from_end);
1720 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1721 *root, struct btrfs_key *key, struct btrfs_path *p, int
1723 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *root, struct extent_buffer *parent,
1725 int start_slot, int cache_only, u64 *last_ret,
1726 struct btrfs_key *progress);
1727 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1728 struct btrfs_path *btrfs_alloc_path(void);
1729 void btrfs_free_path(struct btrfs_path *p);
1730 void btrfs_init_path(struct btrfs_path *p);
1731 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1732 struct btrfs_path *path, int slot, int nr);
1733 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1734 struct btrfs_root *root,
1735 struct btrfs_path *path, u64 bytenr);
1736 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1737 struct btrfs_root *root,
1738 struct btrfs_path *path)
1740 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1743 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1744 *root, struct btrfs_key *key, void *data, u32 data_size);
1745 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1746 struct btrfs_root *root,
1747 struct btrfs_path *path,
1748 struct btrfs_key *cpu_key, u32 *data_size,
1750 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1751 struct btrfs_root *root,
1752 struct btrfs_path *path,
1753 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1755 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1756 struct btrfs_root *root,
1757 struct btrfs_path *path,
1758 struct btrfs_key *key,
1761 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1764 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1765 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1766 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1767 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1769 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1770 struct btrfs_root *root,
1771 struct extent_buffer *node,
1772 struct extent_buffer *parent);
1774 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1775 struct btrfs_key *key);
1776 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1777 *root, struct btrfs_key *key, struct btrfs_root_item
1779 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1780 *root, struct btrfs_key *key, struct btrfs_root_item
1782 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1783 btrfs_root_item *item, struct btrfs_key *key);
1784 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1785 u64 *found_objectid);
1786 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1787 struct btrfs_root *latest_root);
1789 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1790 *root, const char *name, int name_len, u64 dir,
1791 struct btrfs_key *location, u8 type, u64 index);
1792 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1793 struct btrfs_root *root,
1794 struct btrfs_path *path, u64 dir,
1795 const char *name, int name_len,
1797 struct btrfs_dir_item *
1798 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1799 struct btrfs_root *root,
1800 struct btrfs_path *path, u64 dir,
1801 u64 objectid, const char *name, int name_len,
1803 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1804 struct btrfs_path *path,
1805 const char *name, int name_len);
1806 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1807 struct btrfs_root *root,
1808 struct btrfs_path *path,
1809 struct btrfs_dir_item *di);
1810 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1811 struct btrfs_root *root, const char *name,
1812 u16 name_len, const void *data, u16 data_len,
1814 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1815 struct btrfs_root *root,
1816 struct btrfs_path *path, u64 dir,
1817 const char *name, u16 name_len,
1821 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1822 struct btrfs_root *root, u64 offset);
1823 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1824 struct btrfs_root *root, u64 offset);
1827 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1828 struct btrfs_root *fs_root,
1829 u64 dirid, u64 *objectid);
1830 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1833 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1834 struct btrfs_root *root,
1835 const char *name, int name_len,
1836 u64 inode_objectid, u64 ref_objectid, u64 index);
1837 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root,
1839 const char *name, int name_len,
1840 u64 inode_objectid, u64 ref_objectid, u64 *index);
1841 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root,
1843 struct btrfs_path *path, u64 objectid);
1844 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1845 *root, struct btrfs_path *path,
1846 struct btrfs_key *location, int mod);
1849 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1851 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root,
1853 u64 objectid, u64 pos,
1854 u64 disk_offset, u64 disk_num_bytes,
1855 u64 num_bytes, u64 offset, u64 ram_bytes,
1856 u8 compression, u8 encryption, u16 other_encoding);
1857 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1858 struct btrfs_root *root,
1859 struct btrfs_path *path, u64 objectid,
1860 u64 bytenr, int mod);
1861 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1862 struct btrfs_root *root, struct inode *inode,
1863 struct btrfs_ordered_sum *sums);
1864 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1866 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1867 u64 start, unsigned long len);
1868 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1869 struct btrfs_root *root,
1870 struct btrfs_path *path,
1871 u64 objectid, u64 offset,
1873 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1874 struct btrfs_root *root, struct btrfs_path *path,
1878 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1879 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1880 #define ClearPageChecked ClearPageFsMisc
1881 #define SetPageChecked SetPageFsMisc
1882 #define PageChecked PageFsMisc
1885 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
1886 int btrfs_set_inode_index(struct inode *dir, u64 *index);
1887 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1888 struct btrfs_root *root,
1889 struct inode *dir, struct inode *inode,
1890 const char *name, int name_len);
1891 int btrfs_add_link(struct btrfs_trans_handle *trans,
1892 struct inode *parent_inode, struct inode *inode,
1893 const char *name, int name_len, int add_backref, u64 index);
1894 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1895 struct btrfs_root *root,
1896 struct inode *inode, u64 new_size,
1899 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1900 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1901 int btrfs_writepages(struct address_space *mapping,
1902 struct writeback_control *wbc);
1903 int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1904 struct btrfs_trans_handle *trans, u64 new_dirid,
1905 struct btrfs_block_group_cache *block_group);
1907 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1908 size_t size, struct bio *bio, unsigned long bio_flags);
1910 unsigned long btrfs_force_ra(struct address_space *mapping,
1911 struct file_ra_state *ra, struct file *file,
1912 pgoff_t offset, pgoff_t last_index);
1913 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1915 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1916 int btrfs_readpage(struct file *file, struct page *page);
1917 void btrfs_delete_inode(struct inode *inode);
1918 void btrfs_put_inode(struct inode *inode);
1919 void btrfs_read_locked_inode(struct inode *inode);
1920 int btrfs_write_inode(struct inode *inode, int wait);
1921 void btrfs_dirty_inode(struct inode *inode);
1922 struct inode *btrfs_alloc_inode(struct super_block *sb);
1923 void btrfs_destroy_inode(struct inode *inode);
1924 int btrfs_init_cachep(void);
1925 void btrfs_destroy_cachep(void);
1926 long btrfs_ioctl_trans_end(struct file *file);
1927 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1928 struct btrfs_root *root, int wait);
1929 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1930 struct btrfs_root *root);
1931 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1932 struct btrfs_root *root, int *is_new);
1933 int btrfs_commit_write(struct file *file, struct page *page,
1934 unsigned from, unsigned to);
1935 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1936 size_t page_offset, u64 start, u64 end,
1938 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1939 struct btrfs_root *root,
1940 struct inode *inode);
1941 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1942 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1943 void btrfs_orphan_cleanup(struct btrfs_root *root);
1944 int btrfs_cont_expand(struct inode *inode, loff_t size);
1947 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1950 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1951 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1953 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1954 extern struct file_operations btrfs_file_operations;
1955 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1956 struct btrfs_root *root, struct inode *inode,
1957 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1958 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
1959 struct btrfs_root *root,
1960 struct inode *inode, u64 start, u64 end);
1961 int btrfs_release_file(struct inode *inode, struct file *file);
1964 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root, int cache_only);
1968 int btrfs_init_sysfs(void);
1969 void btrfs_exit_sysfs(void);
1970 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1971 int btrfs_sysfs_add_root(struct btrfs_root *root);
1972 void btrfs_sysfs_del_root(struct btrfs_root *root);
1973 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1976 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1979 u64 btrfs_parse_size(char *str);
1980 int btrfs_parse_options(struct btrfs_root *root, char *options);
1981 int btrfs_sync_fs(struct super_block *sb, int wait);
1984 int btrfs_check_acl(struct inode *inode, int mask);
1985 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1986 int btrfs_acl_chmod(struct inode *inode);
1988 /* free-space-cache.c */
1989 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1990 u64 bytenr, u64 size);
1991 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
1992 u64 offset, u64 bytes);
1993 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1994 u64 bytenr, u64 size);
1995 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
1996 u64 offset, u64 bytes);
1997 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1999 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2000 *block_group, u64 offset,
2002 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2004 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);