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 extent_io_tree reloc_mapping_tree;
688 struct list_head dead_reloc_roots;
689 struct btrfs_leaf_ref_tree reloc_ref_tree;
690 struct btrfs_leaf_ref_tree shared_ref_tree;
692 struct kobject super_kobj;
693 struct completion kobj_unregister;
696 int log_root_recovering;
698 atomic_t throttle_gen;
701 struct list_head dirty_cowonly_roots;
703 struct btrfs_fs_devices *fs_devices;
704 struct list_head space_info;
705 spinlock_t delalloc_lock;
706 spinlock_t new_trans_lock;
711 spinlock_t ref_cache_lock;
712 u64 total_ref_cache_size;
714 u64 avail_data_alloc_bits;
715 u64 avail_metadata_alloc_bits;
716 u64 avail_system_alloc_bits;
717 u64 data_alloc_profile;
718 u64 metadata_alloc_profile;
719 u64 system_alloc_profile;
725 * in ram representation of the tree. extent_root is used for all allocations
726 * and for the extent tree extent_root root.
728 struct btrfs_dirty_root;
730 struct extent_buffer *node;
732 /* the node lock is held while changing the node pointer */
733 spinlock_t node_lock;
735 struct extent_buffer *commit_root;
736 struct btrfs_leaf_ref_tree *ref_tree;
737 struct btrfs_leaf_ref_tree ref_tree_struct;
738 struct btrfs_dirty_root *dirty_root;
739 struct btrfs_root *log_root;
740 struct btrfs_root *reloc_root;
742 struct btrfs_root_item root_item;
743 struct btrfs_key root_key;
744 struct btrfs_fs_info *fs_info;
746 struct extent_io_tree dirty_log_pages;
748 struct kobject root_kobj;
749 struct completion kobj_unregister;
750 struct mutex objectid_mutex;
751 struct mutex log_mutex;
756 /* data allocations are done in sectorsize units */
759 /* node allocations are done in nodesize units */
762 /* leaf allocations are done in leafsize units */
769 u64 last_inode_alloc;
772 u64 defrag_trans_start;
773 struct btrfs_key defrag_progress;
774 struct btrfs_key defrag_max;
780 /* the dirty list is only used by non-reference counted roots */
781 struct list_head dirty_list;
783 spinlock_t list_lock;
784 struct list_head dead_list;
785 struct list_head orphan_list;
790 * inode items have the data typically returned from stat and store other
791 * info about object characteristics. There is one for every file and dir in
794 #define BTRFS_INODE_ITEM_KEY 1
795 #define BTRFS_INODE_REF_KEY 2
796 #define BTRFS_XATTR_ITEM_KEY 8
797 #define BTRFS_ORPHAN_ITEM_KEY 9
798 /* reserve 2-15 close to the inode for later flexibility */
801 * dir items are the name -> inode pointers in a directory. There is one
802 * for every name in a directory.
804 #define BTRFS_DIR_LOG_ITEM_KEY 14
805 #define BTRFS_DIR_LOG_INDEX_KEY 15
806 #define BTRFS_DIR_ITEM_KEY 16
807 #define BTRFS_DIR_INDEX_KEY 17
809 * extent data is for file data
811 #define BTRFS_EXTENT_DATA_KEY 18
813 * csum items have the checksums for data in the extents
815 #define BTRFS_CSUM_ITEM_KEY 19
818 /* reserve 21-31 for other file/dir stuff */
821 * root items point to tree roots. There are typically in the root
822 * tree used by the super block to find all the other trees
824 #define BTRFS_ROOT_ITEM_KEY 32
826 * extent items are in the extent map tree. These record which blocks
827 * are used, and how many references there are to each block
829 #define BTRFS_EXTENT_ITEM_KEY 33
830 #define BTRFS_EXTENT_REF_KEY 34
833 * block groups give us hints into the extent allocation trees. Which
834 * blocks are free etc etc
836 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
838 #define BTRFS_DEV_EXTENT_KEY 75
839 #define BTRFS_DEV_ITEM_KEY 76
840 #define BTRFS_CHUNK_ITEM_KEY 77
843 * string items are for debugging. They just store a short string of
846 #define BTRFS_STRING_ITEM_KEY 253
848 #define BTRFS_MOUNT_NODATASUM (1 << 0)
849 #define BTRFS_MOUNT_NODATACOW (1 << 1)
850 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
851 #define BTRFS_MOUNT_SSD (1 << 3)
852 #define BTRFS_MOUNT_DEGRADED (1 << 4)
853 #define BTRFS_MOUNT_COMPRESS (1 << 5)
855 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
856 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
857 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
862 #define BTRFS_INODE_NODATASUM (1 << 0)
863 #define BTRFS_INODE_NODATACOW (1 << 1)
864 #define BTRFS_INODE_READONLY (1 << 2)
865 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
866 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
868 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
870 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
872 /* some macros to generate set/get funcs for the struct fields. This
873 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
876 #define le8_to_cpu(v) (v)
877 #define cpu_to_le8(v) (v)
880 #define read_eb_member(eb, ptr, type, member, result) ( \
881 read_extent_buffer(eb, (char *)(result), \
882 ((unsigned long)(ptr)) + \
883 offsetof(type, member), \
884 sizeof(((type *)0)->member)))
886 #define write_eb_member(eb, ptr, type, member, result) ( \
887 write_extent_buffer(eb, (char *)(result), \
888 ((unsigned long)(ptr)) + \
889 offsetof(type, member), \
890 sizeof(((type *)0)->member)))
892 #ifndef BTRFS_SETGET_FUNCS
893 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
894 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
895 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
898 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
899 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
901 type *p = kmap_atomic(eb->first_page, KM_USER0); \
902 u##bits res = le##bits##_to_cpu(p->member); \
903 kunmap_atomic(p, KM_USER0); \
906 static inline void btrfs_set_##name(struct extent_buffer *eb, \
909 type *p = kmap_atomic(eb->first_page, KM_USER0); \
910 p->member = cpu_to_le##bits(val); \
911 kunmap_atomic(p, KM_USER0); \
914 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
915 static inline u##bits btrfs_##name(type *s) \
917 return le##bits##_to_cpu(s->member); \
919 static inline void btrfs_set_##name(type *s, u##bits val) \
921 s->member = cpu_to_le##bits(val); \
924 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
925 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
926 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
927 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
928 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
929 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
930 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
931 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
932 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
933 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
935 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
936 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
938 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
940 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
942 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
944 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
946 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
947 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
949 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
951 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
954 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
956 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
959 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
960 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
961 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
962 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
963 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
964 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
965 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
966 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
967 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
968 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
969 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
971 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
973 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
976 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
977 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
978 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
980 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
982 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
984 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
986 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
987 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
989 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
991 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
992 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
994 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
997 unsigned long offset = (unsigned long)c;
998 offset += offsetof(struct btrfs_chunk, stripe);
999 offset += nr * sizeof(struct btrfs_stripe);
1000 return (struct btrfs_stripe *)offset;
1003 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1005 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1008 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1009 struct btrfs_chunk *c, int nr)
1011 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1014 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1015 struct btrfs_chunk *c, int nr,
1018 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1021 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1022 struct btrfs_chunk *c, int nr)
1024 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1027 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1028 struct btrfs_chunk *c, int nr,
1031 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1034 /* struct btrfs_block_group_item */
1035 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1037 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1039 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1040 struct btrfs_block_group_item, chunk_objectid, 64);
1042 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1043 struct btrfs_block_group_item, chunk_objectid, 64);
1044 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1045 struct btrfs_block_group_item, flags, 64);
1046 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1047 struct btrfs_block_group_item, flags, 64);
1049 /* struct btrfs_inode_ref */
1050 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1051 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1053 /* struct btrfs_inode_item */
1054 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1055 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1056 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1057 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1058 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1059 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1060 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1061 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1062 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1063 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1064 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1065 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1068 static inline struct btrfs_timespec *
1069 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1071 unsigned long ptr = (unsigned long)inode_item;
1072 ptr += offsetof(struct btrfs_inode_item, atime);
1073 return (struct btrfs_timespec *)ptr;
1076 static inline struct btrfs_timespec *
1077 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1079 unsigned long ptr = (unsigned long)inode_item;
1080 ptr += offsetof(struct btrfs_inode_item, mtime);
1081 return (struct btrfs_timespec *)ptr;
1084 static inline struct btrfs_timespec *
1085 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1087 unsigned long ptr = (unsigned long)inode_item;
1088 ptr += offsetof(struct btrfs_inode_item, ctime);
1089 return (struct btrfs_timespec *)ptr;
1092 static inline struct btrfs_timespec *
1093 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1095 unsigned long ptr = (unsigned long)inode_item;
1096 ptr += offsetof(struct btrfs_inode_item, otime);
1097 return (struct btrfs_timespec *)ptr;
1100 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1101 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1103 /* struct btrfs_dev_extent */
1104 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1106 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1107 chunk_objectid, 64);
1108 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1110 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1112 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1114 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1115 return (u8 *)((unsigned long)dev + ptr);
1118 /* struct btrfs_extent_ref */
1119 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1120 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1121 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1122 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1124 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1125 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1127 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1129 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1132 /* struct btrfs_extent_item */
1133 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1134 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1137 /* struct btrfs_node */
1138 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1139 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1141 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1144 ptr = offsetof(struct btrfs_node, ptrs) +
1145 sizeof(struct btrfs_key_ptr) * nr;
1146 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1149 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1153 ptr = offsetof(struct btrfs_node, ptrs) +
1154 sizeof(struct btrfs_key_ptr) * nr;
1155 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1158 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1161 ptr = offsetof(struct btrfs_node, ptrs) +
1162 sizeof(struct btrfs_key_ptr) * nr;
1163 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1166 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1170 ptr = offsetof(struct btrfs_node, ptrs) +
1171 sizeof(struct btrfs_key_ptr) * nr;
1172 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1175 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1177 return offsetof(struct btrfs_node, ptrs) +
1178 sizeof(struct btrfs_key_ptr) * nr;
1181 void btrfs_node_key(struct extent_buffer *eb,
1182 struct btrfs_disk_key *disk_key, int nr);
1184 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1185 struct btrfs_disk_key *disk_key, int nr)
1188 ptr = btrfs_node_key_ptr_offset(nr);
1189 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1190 struct btrfs_key_ptr, key, disk_key);
1193 /* struct btrfs_item */
1194 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1195 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1197 static inline unsigned long btrfs_item_nr_offset(int nr)
1199 return offsetof(struct btrfs_leaf, items) +
1200 sizeof(struct btrfs_item) * nr;
1203 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1206 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1209 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1210 struct btrfs_item *item)
1212 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1215 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1217 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1220 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1222 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1225 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1227 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1230 static inline void btrfs_item_key(struct extent_buffer *eb,
1231 struct btrfs_disk_key *disk_key, int nr)
1233 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1234 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1237 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1238 struct btrfs_disk_key *disk_key, int nr)
1240 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1241 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1244 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1246 /* struct btrfs_dir_item */
1247 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1248 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1249 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1250 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1252 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1253 struct btrfs_dir_item *item,
1254 struct btrfs_disk_key *key)
1256 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1259 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1260 struct btrfs_dir_item *item,
1261 struct btrfs_disk_key *key)
1263 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1266 /* struct btrfs_disk_key */
1267 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1269 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1270 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1272 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1273 struct btrfs_disk_key *disk)
1275 cpu->offset = le64_to_cpu(disk->offset);
1276 cpu->type = disk->type;
1277 cpu->objectid = le64_to_cpu(disk->objectid);
1280 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1281 struct btrfs_key *cpu)
1283 disk->offset = cpu_to_le64(cpu->offset);
1284 disk->type = cpu->type;
1285 disk->objectid = cpu_to_le64(cpu->objectid);
1288 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1289 struct btrfs_key *key, int nr)
1291 struct btrfs_disk_key disk_key;
1292 btrfs_node_key(eb, &disk_key, nr);
1293 btrfs_disk_key_to_cpu(key, &disk_key);
1296 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1297 struct btrfs_key *key, int nr)
1299 struct btrfs_disk_key disk_key;
1300 btrfs_item_key(eb, &disk_key, nr);
1301 btrfs_disk_key_to_cpu(key, &disk_key);
1304 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1305 struct btrfs_dir_item *item,
1306 struct btrfs_key *key)
1308 struct btrfs_disk_key disk_key;
1309 btrfs_dir_item_key(eb, item, &disk_key);
1310 btrfs_disk_key_to_cpu(key, &disk_key);
1314 static inline u8 btrfs_key_type(struct btrfs_key *key)
1319 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1324 /* struct btrfs_header */
1325 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1326 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1328 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1329 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1330 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1331 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1333 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1335 return (btrfs_header_flags(eb) & flag) == flag;
1338 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1340 u64 flags = btrfs_header_flags(eb);
1341 btrfs_set_header_flags(eb, flags | flag);
1342 return (flags & flag) == flag;
1345 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1347 u64 flags = btrfs_header_flags(eb);
1348 btrfs_set_header_flags(eb, flags & ~flag);
1349 return (flags & flag) == flag;
1352 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1354 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1358 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1360 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1364 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1366 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1370 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1372 unsigned long ptr = offsetof(struct btrfs_header, csum);
1376 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1381 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1386 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1391 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1393 return (btrfs_header_level(eb) == 0);
1396 /* struct btrfs_root_item */
1397 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1398 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1399 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1401 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1402 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1403 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1404 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1405 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1406 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1407 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1409 /* struct btrfs_super_block */
1410 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1411 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1412 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1414 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1415 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1416 struct btrfs_super_block, sys_chunk_array_size, 32);
1417 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1419 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1421 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1422 chunk_root_level, 8);
1423 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1425 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1427 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1429 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1431 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1433 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1435 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1437 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1439 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1440 root_dir_objectid, 64);
1441 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1444 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1446 return offsetof(struct btrfs_leaf, items);
1449 /* struct btrfs_file_extent_item */
1450 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1452 static inline unsigned long btrfs_file_extent_inline_start(struct
1453 btrfs_file_extent_item *e)
1455 unsigned long offset = (unsigned long)e;
1456 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1460 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1462 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1465 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1467 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1469 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1470 disk_num_bytes, 64);
1471 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1473 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1475 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1477 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1479 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1481 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1482 other_encoding, 16);
1484 /* this returns the number of file bytes represented by the inline item.
1485 * If an item is compressed, this is the uncompressed size
1487 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1488 struct btrfs_file_extent_item *e)
1490 return btrfs_file_extent_ram_bytes(eb, e);
1494 * this returns the number of bytes used by the item on disk, minus the
1495 * size of any extent headers. If a file is compressed on disk, this is
1496 * the compressed size
1498 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1499 struct btrfs_item *e)
1501 unsigned long offset;
1502 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1503 return btrfs_item_size(eb, e) - offset;
1506 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1508 return sb->s_fs_info;
1511 static inline int btrfs_set_root_name(struct btrfs_root *root,
1512 const char *name, int len)
1514 /* if we already have a name just free it */
1518 root->name = kmalloc(len+1, GFP_KERNEL);
1522 memcpy(root->name, name, len);
1523 root->name[len] ='\0';
1528 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1530 return root->leafsize;
1531 return root->nodesize;
1534 /* helper function to cast into the data area of the leaf. */
1535 #define btrfs_item_ptr(leaf, slot, type) \
1536 ((type *)(btrfs_leaf_data(leaf) + \
1537 btrfs_item_offset_nr(leaf, slot)))
1539 #define btrfs_item_ptr_offset(leaf, slot) \
1540 ((unsigned long)(btrfs_leaf_data(leaf) + \
1541 btrfs_item_offset_nr(leaf, slot)))
1543 static inline struct dentry *fdentry(struct file *file)
1545 return file->f_path.dentry;
1549 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1550 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1551 struct btrfs_root *root, u64 bytenr,
1552 u64 num_bytes, u32 *refs);
1553 int btrfs_update_pinned_extents(struct btrfs_root *root,
1554 u64 bytenr, u64 num, int pin);
1555 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1556 struct btrfs_root *root, struct extent_buffer *leaf);
1557 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1558 struct btrfs_root *root,
1559 struct btrfs_key *key, u64 bytenr);
1560 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1561 struct btrfs_root *root);
1562 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1563 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1564 btrfs_fs_info *info,
1566 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1567 struct btrfs_block_group_cache
1568 *hint, u64 search_start,
1569 int data, int owner);
1570 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root,
1572 u32 blocksize, u64 parent,
1578 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 u64 bytenr, u32 blocksize);
1581 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1582 struct btrfs_root *root,
1583 u64 num_bytes, u64 parent, u64 min_bytes,
1584 u64 root_objectid, u64 ref_generation,
1585 u64 owner, u64 empty_size, u64 hint_byte,
1586 u64 search_end, struct btrfs_key *ins, u64 data);
1587 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root, u64 parent,
1589 u64 root_objectid, u64 ref_generation,
1590 u64 owner, struct btrfs_key *ins);
1591 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1592 struct btrfs_root *root, u64 parent,
1593 u64 root_objectid, u64 ref_generation,
1594 u64 owner, struct btrfs_key *ins);
1595 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1596 struct btrfs_root *root,
1597 u64 num_bytes, u64 min_alloc_size,
1598 u64 empty_size, u64 hint_byte,
1599 u64 search_end, struct btrfs_key *ins,
1601 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1602 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1604 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1605 struct extent_buffer *buf, u32 nr_extents);
1606 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1607 struct btrfs_root *root, struct extent_buffer *orig_buf,
1608 struct extent_buffer *buf, int start_slot, int nr);
1609 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1610 struct btrfs_root *root,
1611 u64 bytenr, u64 num_bytes, u64 parent,
1612 u64 root_objectid, u64 ref_generation,
1613 u64 owner_objectid, int pin);
1614 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1615 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1616 struct btrfs_root *root,
1617 struct extent_io_tree *unpin);
1618 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1619 struct btrfs_root *root,
1620 u64 bytenr, u64 num_bytes, u64 parent,
1621 u64 root_objectid, u64 ref_generation,
1622 u64 owner_objectid);
1623 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1624 struct btrfs_root *root, u64 bytenr,
1625 u64 orig_parent, u64 parent,
1626 u64 root_objectid, u64 ref_generation,
1627 u64 owner_objectid);
1628 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1629 struct btrfs_root *root);
1630 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1631 int btrfs_read_block_groups(struct btrfs_root *root);
1632 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1633 struct btrfs_root *root, u64 bytes_used,
1634 u64 type, u64 chunk_objectid, u64 chunk_offset,
1636 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1637 struct btrfs_root *root, u64 group_start);
1638 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1639 int btrfs_free_reloc_root(struct btrfs_root *root);
1640 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1641 int btrfs_add_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1642 u64 num_bytes, u64 new_bytenr);
1643 int btrfs_get_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1644 u64 num_bytes, u64 *new_bytenr);
1645 void btrfs_free_reloc_mappings(struct btrfs_root *root);
1646 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1647 struct btrfs_root *root,
1648 struct extent_buffer *buf, u64 orig_start);
1649 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1650 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1652 int btrfs_previous_item(struct btrfs_root *root,
1653 struct btrfs_path *path, u64 min_objectid,
1655 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1656 struct btrfs_root *root,
1657 struct btrfs_key *node_keys,
1658 u64 *nodes, int lowest_level);
1659 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1660 struct btrfs_root *root, struct btrfs_path *path,
1661 struct btrfs_key *new_key);
1662 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1663 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1664 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1665 struct btrfs_key *key, int lowest_level,
1666 int cache_only, u64 min_trans);
1667 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1668 struct btrfs_key *max_key,
1669 struct btrfs_path *path, int cache_only,
1671 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1672 struct btrfs_root *root, struct extent_buffer *buf,
1673 struct extent_buffer *parent, int parent_slot,
1674 struct extent_buffer **cow_ret, u64 prealloc_dest);
1675 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1676 struct btrfs_root *root,
1677 struct extent_buffer *buf,
1678 struct extent_buffer **cow_ret, u64 new_root_objectid);
1679 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1680 *root, struct btrfs_path *path, u32 data_size);
1681 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root,
1683 struct btrfs_path *path,
1684 u32 new_size, int from_end);
1685 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1686 *root, struct btrfs_key *key, struct btrfs_path *p, int
1688 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1689 struct btrfs_root *root, struct extent_buffer *parent,
1690 int start_slot, int cache_only, u64 *last_ret,
1691 struct btrfs_key *progress);
1692 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1693 struct btrfs_path *btrfs_alloc_path(void);
1694 void btrfs_free_path(struct btrfs_path *p);
1695 void btrfs_init_path(struct btrfs_path *p);
1696 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1697 struct btrfs_path *path, int slot, int nr);
1698 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root,
1700 struct btrfs_path *path, u64 bytenr);
1701 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root,
1703 struct btrfs_path *path)
1705 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1708 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1709 *root, struct btrfs_key *key, void *data, u32 data_size);
1710 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root,
1712 struct btrfs_path *path,
1713 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1715 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root,
1717 struct btrfs_path *path,
1718 struct btrfs_key *key,
1721 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1724 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1725 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1726 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1727 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1730 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1731 struct btrfs_key *key);
1732 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1733 *root, struct btrfs_key *key, struct btrfs_root_item
1735 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1736 *root, struct btrfs_key *key, struct btrfs_root_item
1738 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1739 btrfs_root_item *item, struct btrfs_key *key);
1740 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1741 u64 *found_objectid);
1742 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1743 struct btrfs_root *latest_root);
1745 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1746 *root, const char *name, int name_len, u64 dir,
1747 struct btrfs_key *location, u8 type, u64 index);
1748 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1749 struct btrfs_root *root,
1750 struct btrfs_path *path, u64 dir,
1751 const char *name, int name_len,
1753 struct btrfs_dir_item *
1754 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root,
1756 struct btrfs_path *path, u64 dir,
1757 u64 objectid, const char *name, int name_len,
1759 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1760 struct btrfs_path *path,
1761 const char *name, int name_len);
1762 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1763 struct btrfs_root *root,
1764 struct btrfs_path *path,
1765 struct btrfs_dir_item *di);
1766 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root, const char *name,
1768 u16 name_len, const void *data, u16 data_len,
1770 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1771 struct btrfs_root *root,
1772 struct btrfs_path *path, u64 dir,
1773 const char *name, u16 name_len,
1777 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1778 struct btrfs_root *root, u64 offset);
1779 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1780 struct btrfs_root *root, u64 offset);
1783 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1784 struct btrfs_root *fs_root,
1785 u64 dirid, u64 *objectid);
1786 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1789 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1790 struct btrfs_root *root,
1791 const char *name, int name_len,
1792 u64 inode_objectid, u64 ref_objectid, u64 index);
1793 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1794 struct btrfs_root *root,
1795 const char *name, int name_len,
1796 u64 inode_objectid, u64 ref_objectid, u64 *index);
1797 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1798 struct btrfs_root *root,
1799 struct btrfs_path *path, u64 objectid);
1800 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1801 *root, struct btrfs_path *path,
1802 struct btrfs_key *location, int mod);
1805 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1807 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1808 struct btrfs_root *root,
1809 u64 objectid, u64 pos,
1810 u64 disk_offset, u64 disk_num_bytes,
1811 u64 num_bytes, u64 offset, u64 ram_bytes,
1812 u8 compression, u8 encryption, u16 other_encoding);
1813 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1814 struct btrfs_root *root,
1815 struct btrfs_path *path, u64 objectid,
1816 u64 bytenr, int mod);
1817 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1818 struct btrfs_root *root, struct inode *inode,
1819 struct btrfs_ordered_sum *sums);
1820 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1822 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1823 u64 start, unsigned long len);
1824 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1825 struct btrfs_root *root,
1826 struct btrfs_path *path,
1827 u64 objectid, u64 offset,
1829 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1830 struct btrfs_root *root, struct btrfs_path *path,
1834 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1835 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1836 #define ClearPageChecked ClearPageFsMisc
1837 #define SetPageChecked SetPageFsMisc
1838 #define PageChecked PageFsMisc
1841 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1842 struct btrfs_root *root,
1843 struct inode *dir, struct inode *inode,
1844 const char *name, int name_len);
1845 int btrfs_add_link(struct btrfs_trans_handle *trans,
1846 struct inode *parent_inode, struct inode *inode,
1847 const char *name, int name_len, int add_backref, u64 index);
1848 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1849 struct btrfs_root *root,
1850 struct inode *inode, u64 new_size,
1853 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1854 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1855 int btrfs_writepages(struct address_space *mapping,
1856 struct writeback_control *wbc);
1857 int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1858 struct btrfs_trans_handle *trans, u64 new_dirid,
1859 struct btrfs_block_group_cache *block_group);
1861 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1864 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1865 size_t size, struct bio *bio, unsigned long bio_flags);
1867 unsigned long btrfs_force_ra(struct address_space *mapping,
1868 struct file_ra_state *ra, struct file *file,
1869 pgoff_t offset, pgoff_t last_index);
1870 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1872 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1873 int btrfs_readpage(struct file *file, struct page *page);
1874 void btrfs_delete_inode(struct inode *inode);
1875 void btrfs_put_inode(struct inode *inode);
1876 void btrfs_read_locked_inode(struct inode *inode);
1877 int btrfs_write_inode(struct inode *inode, int wait);
1878 void btrfs_dirty_inode(struct inode *inode);
1879 struct inode *btrfs_alloc_inode(struct super_block *sb);
1880 void btrfs_destroy_inode(struct inode *inode);
1881 int btrfs_init_cachep(void);
1882 void btrfs_destroy_cachep(void);
1883 long btrfs_ioctl_trans_end(struct file *file);
1884 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1885 struct btrfs_root *root, int wait);
1886 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1887 struct btrfs_root *root);
1888 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1889 struct btrfs_root *root, int *is_new);
1890 int btrfs_commit_write(struct file *file, struct page *page,
1891 unsigned from, unsigned to);
1892 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1893 size_t page_offset, u64 start, u64 end,
1895 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1896 struct btrfs_root *root,
1897 struct inode *inode);
1898 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1899 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1900 void btrfs_orphan_cleanup(struct btrfs_root *root);
1903 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1906 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1907 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1909 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1910 extern struct file_operations btrfs_file_operations;
1911 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1912 struct btrfs_root *root, struct inode *inode,
1913 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1914 int btrfs_release_file(struct inode *inode, struct file *file);
1917 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1918 struct btrfs_root *root, int cache_only);
1921 int btrfs_init_sysfs(void);
1922 void btrfs_exit_sysfs(void);
1923 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1924 int btrfs_sysfs_add_root(struct btrfs_root *root);
1925 void btrfs_sysfs_del_root(struct btrfs_root *root);
1926 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1929 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1932 u64 btrfs_parse_size(char *str);
1933 int btrfs_parse_options(struct btrfs_root *root, char *options);
1934 int btrfs_sync_fs(struct super_block *sb, int wait);
1937 int btrfs_check_acl(struct inode *inode, int mask);
1938 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1939 int btrfs_acl_chmod(struct inode *inode);
1941 /* free-space-cache.c */
1942 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1943 u64 bytenr, u64 size);
1944 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1945 u64 bytenr, u64 size);
1946 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1948 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1949 *block_group, u64 offset,
1951 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1953 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);