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 "_BFRfS_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__));
473 * this is used for both forward and backward root refs
475 struct btrfs_root_ref {
479 } __attribute__ ((__packed__));
481 #define BTRFS_FILE_EXTENT_INLINE 0
482 #define BTRFS_FILE_EXTENT_REG 1
483 #define BTRFS_FILE_EXTENT_PREALLOC 2
485 struct btrfs_file_extent_item {
487 * transaction id that created this extent
491 * max number of bytes to hold this extent in ram
492 * when we split a compressed extent we can't know how big
493 * each of the resulting pieces will be. So, this is
494 * an upper limit on the size of the extent in ram instead of
500 * 32 bits for the various ways we might encode the data,
501 * including compression and encryption. If any of these
502 * are set to something a given disk format doesn't understand
503 * it is treated like an incompat flag for reading and writing,
508 __le16 other_encoding; /* spare for later use */
510 /* are we inline data or a real extent? */
514 * disk space consumed by the extent, checksum blocks are included
518 __le64 disk_num_bytes;
520 * the logical offset in file blocks (no csums)
521 * this extent record is for. This allows a file extent to point
522 * into the middle of an existing extent on disk, sharing it
523 * between two snapshots (useful if some bytes in the middle of the
524 * extent have changed
528 * the logical number of file blocks (no csums included). This
529 * always reflects the size uncompressed and without encoding.
533 } __attribute__ ((__packed__));
535 struct btrfs_csum_item {
537 } __attribute__ ((__packed__));
539 /* different types of block groups (and chunks) */
540 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
541 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
542 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
543 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
544 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
545 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
546 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
548 struct btrfs_block_group_item {
550 __le64 chunk_objectid;
552 } __attribute__ ((__packed__));
554 struct btrfs_space_info {
563 struct list_head list;
565 /* for block groups in our same type */
566 struct list_head block_groups;
568 struct rw_semaphore groups_sem;
571 struct btrfs_free_space {
572 struct rb_node bytes_index;
573 struct rb_node offset_index;
578 struct btrfs_block_group_cache {
579 struct btrfs_key key;
580 struct btrfs_block_group_item item;
582 struct mutex alloc_mutex;
583 struct mutex cache_mutex;
591 struct btrfs_space_info *space_info;
593 /* free space cache stuff */
594 struct rb_root free_space_bytes;
595 struct rb_root free_space_offset;
597 /* block group cache stuff */
598 struct rb_node cache_node;
600 /* for block groups in the same raid type */
601 struct list_head list;
604 struct btrfs_leaf_ref_tree {
606 struct list_head list;
611 struct btrfs_fs_devices;
612 struct btrfs_fs_info {
613 u8 fsid[BTRFS_FSID_SIZE];
614 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
615 struct btrfs_root *extent_root;
616 struct btrfs_root *tree_root;
617 struct btrfs_root *chunk_root;
618 struct btrfs_root *dev_root;
619 struct btrfs_root *fs_root;
621 /* the log root tree is a directory of all the other log roots */
622 struct btrfs_root *log_root_tree;
623 struct radix_tree_root fs_roots_radix;
625 /* block group cache stuff */
626 spinlock_t block_group_cache_lock;
627 struct rb_root block_group_cache_tree;
629 struct extent_io_tree pinned_extents;
630 struct extent_io_tree pending_del;
631 struct extent_io_tree extent_ins;
633 /* logical->physical extent mapping */
634 struct btrfs_mapping_tree mapping_tree;
637 u64 last_trans_committed;
638 u64 last_trans_new_blockgroup;
639 u64 open_ioctl_trans;
640 unsigned long mount_opt;
644 struct btrfs_transaction *running_transaction;
645 wait_queue_head_t transaction_throttle;
646 wait_queue_head_t transaction_wait;
648 wait_queue_head_t async_submit_wait;
649 wait_queue_head_t tree_log_wait;
651 struct btrfs_super_block super_copy;
652 struct btrfs_super_block super_for_commit;
653 struct block_device *__bdev;
654 struct super_block *sb;
655 struct inode *btree_inode;
656 struct backing_dev_info bdi;
657 spinlock_t hash_lock;
658 struct mutex trans_mutex;
659 struct mutex tree_log_mutex;
660 struct mutex transaction_kthread_mutex;
661 struct mutex cleaner_mutex;
662 struct mutex extent_ins_mutex;
663 struct mutex pinned_mutex;
664 struct mutex chunk_mutex;
665 struct mutex drop_mutex;
666 struct mutex volume_mutex;
667 struct mutex tree_reloc_mutex;
668 struct list_head trans_list;
669 struct list_head hashers;
670 struct list_head dead_roots;
672 atomic_t nr_async_submits;
673 atomic_t async_submit_draining;
674 atomic_t nr_async_bios;
675 atomic_t async_delalloc_pages;
676 atomic_t tree_log_writers;
677 atomic_t tree_log_commit;
678 unsigned long tree_log_batch;
679 u64 tree_log_transid;
682 * this is used by the balancing code to wait for all the pending
685 spinlock_t ordered_extent_lock;
686 struct list_head ordered_extents;
687 struct list_head delalloc_inodes;
690 * there is a pool of worker threads for checksumming during writes
691 * and a pool for checksumming after reads. This is because readers
692 * can run with FS locks held, and the writers may be waiting for
693 * those locks. We don't want ordering in the pending list to cause
694 * deadlocks, and so the two are serviced separately.
696 * A third pool does submit_bio to avoid deadlocking with the other
699 struct btrfs_workers workers;
700 struct btrfs_workers delalloc_workers;
701 struct btrfs_workers endio_workers;
702 struct btrfs_workers endio_write_workers;
703 struct btrfs_workers submit_workers;
705 * fixup workers take dirty pages that didn't properly go through
706 * the cow mechanism and make them safe to write. It happens
707 * for the sys_munmap function call path
709 struct btrfs_workers fixup_workers;
710 struct task_struct *transaction_kthread;
711 struct task_struct *cleaner_kthread;
712 int thread_pool_size;
714 /* tree relocation relocated fields */
715 struct list_head dead_reloc_roots;
716 struct btrfs_leaf_ref_tree reloc_ref_tree;
717 struct btrfs_leaf_ref_tree shared_ref_tree;
719 struct kobject super_kobj;
720 struct completion kobj_unregister;
723 int log_root_recovering;
725 atomic_t throttle_gen;
728 struct list_head dirty_cowonly_roots;
730 struct btrfs_fs_devices *fs_devices;
731 struct list_head space_info;
732 spinlock_t delalloc_lock;
733 spinlock_t new_trans_lock;
738 spinlock_t ref_cache_lock;
739 u64 total_ref_cache_size;
741 u64 avail_data_alloc_bits;
742 u64 avail_metadata_alloc_bits;
743 u64 avail_system_alloc_bits;
744 u64 data_alloc_profile;
745 u64 metadata_alloc_profile;
746 u64 system_alloc_profile;
752 * in ram representation of the tree. extent_root is used for all allocations
753 * and for the extent tree extent_root root.
755 struct btrfs_dirty_root;
757 struct extent_buffer *node;
759 /* the node lock is held while changing the node pointer */
760 spinlock_t node_lock;
762 struct extent_buffer *commit_root;
763 struct btrfs_leaf_ref_tree *ref_tree;
764 struct btrfs_leaf_ref_tree ref_tree_struct;
765 struct btrfs_dirty_root *dirty_root;
766 struct btrfs_root *log_root;
767 struct btrfs_root *reloc_root;
769 struct btrfs_root_item root_item;
770 struct btrfs_key root_key;
771 struct btrfs_fs_info *fs_info;
772 struct extent_io_tree dirty_log_pages;
774 struct kobject root_kobj;
775 struct completion kobj_unregister;
776 struct mutex objectid_mutex;
777 struct mutex log_mutex;
782 /* data allocations are done in sectorsize units */
785 /* node allocations are done in nodesize units */
788 /* leaf allocations are done in leafsize units */
795 u64 last_inode_alloc;
798 u64 defrag_trans_start;
799 struct btrfs_key defrag_progress;
800 struct btrfs_key defrag_max;
806 /* the dirty list is only used by non-reference counted roots */
807 struct list_head dirty_list;
809 spinlock_t list_lock;
810 struct list_head dead_list;
811 struct list_head orphan_list;
814 * right now this just gets used so that a root has its own devid
815 * for stat. It may be used for more later
817 struct super_block anon_super;
822 * inode items have the data typically returned from stat and store other
823 * info about object characteristics. There is one for every file and dir in
826 #define BTRFS_INODE_ITEM_KEY 1
827 #define BTRFS_INODE_REF_KEY 12
828 #define BTRFS_XATTR_ITEM_KEY 24
829 #define BTRFS_ORPHAN_ITEM_KEY 48
830 /* reserve 2-15 close to the inode for later flexibility */
833 * dir items are the name -> inode pointers in a directory. There is one
834 * for every name in a directory.
836 #define BTRFS_DIR_LOG_ITEM_KEY 60
837 #define BTRFS_DIR_LOG_INDEX_KEY 72
838 #define BTRFS_DIR_ITEM_KEY 84
839 #define BTRFS_DIR_INDEX_KEY 96
841 * extent data is for file data
843 #define BTRFS_EXTENT_DATA_KEY 108
845 * csum items have the checksums for data in the extents
847 #define BTRFS_CSUM_ITEM_KEY 120
850 /* reserve 21-31 for other file/dir stuff */
853 * root items point to tree roots. There are typically in the root
854 * tree used by the super block to find all the other trees
856 #define BTRFS_ROOT_ITEM_KEY 132
859 * root backrefs tie subvols and snapshots to the directory entries that
862 #define BTRFS_ROOT_BACKREF_KEY 144
865 * root refs make a fast index for listing all of the snapshots and
866 * subvolumes referenced by a given root. They point directly to the
867 * directory item in the root that references the subvol
869 #define BTRFS_ROOT_REF_KEY 156
872 * extent items are in the extent map tree. These record which blocks
873 * are used, and how many references there are to each block
875 #define BTRFS_EXTENT_ITEM_KEY 168
876 #define BTRFS_EXTENT_REF_KEY 180
879 * block groups give us hints into the extent allocation trees. Which
880 * blocks are free etc etc
882 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
884 #define BTRFS_DEV_EXTENT_KEY 204
885 #define BTRFS_DEV_ITEM_KEY 216
886 #define BTRFS_CHUNK_ITEM_KEY 228
889 * string items are for debugging. They just store a short string of
892 #define BTRFS_STRING_ITEM_KEY 253
894 #define BTRFS_MOUNT_NODATASUM (1 << 0)
895 #define BTRFS_MOUNT_NODATACOW (1 << 1)
896 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
897 #define BTRFS_MOUNT_SSD (1 << 3)
898 #define BTRFS_MOUNT_DEGRADED (1 << 4)
899 #define BTRFS_MOUNT_COMPRESS (1 << 5)
901 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
902 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
903 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
908 #define BTRFS_INODE_NODATASUM (1 << 0)
909 #define BTRFS_INODE_NODATACOW (1 << 1)
910 #define BTRFS_INODE_READONLY (1 << 2)
911 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
912 #define BTRFS_INODE_PREALLOC (1 << 4)
913 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
915 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
917 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
919 /* some macros to generate set/get funcs for the struct fields. This
920 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
923 #define le8_to_cpu(v) (v)
924 #define cpu_to_le8(v) (v)
927 #define read_eb_member(eb, ptr, type, member, result) ( \
928 read_extent_buffer(eb, (char *)(result), \
929 ((unsigned long)(ptr)) + \
930 offsetof(type, member), \
931 sizeof(((type *)0)->member)))
933 #define write_eb_member(eb, ptr, type, member, result) ( \
934 write_extent_buffer(eb, (char *)(result), \
935 ((unsigned long)(ptr)) + \
936 offsetof(type, member), \
937 sizeof(((type *)0)->member)))
939 #ifndef BTRFS_SETGET_FUNCS
940 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
941 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
942 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
945 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
946 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
948 type *p = kmap_atomic(eb->first_page, KM_USER0); \
949 u##bits res = le##bits##_to_cpu(p->member); \
950 kunmap_atomic(p, KM_USER0); \
953 static inline void btrfs_set_##name(struct extent_buffer *eb, \
956 type *p = kmap_atomic(eb->first_page, KM_USER0); \
957 p->member = cpu_to_le##bits(val); \
958 kunmap_atomic(p, KM_USER0); \
961 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
962 static inline u##bits btrfs_##name(type *s) \
964 return le##bits##_to_cpu(s->member); \
966 static inline void btrfs_set_##name(type *s, u##bits val) \
968 s->member = cpu_to_le##bits(val); \
971 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
972 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
973 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
974 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
975 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
976 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
977 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
978 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
979 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
980 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
981 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
983 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
984 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
986 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
988 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
990 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
992 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
994 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
995 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
997 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
999 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1001 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1004 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1006 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1009 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1011 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1014 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1015 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1016 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1017 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1018 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1019 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1020 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1021 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1022 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1023 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1024 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1026 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1028 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1031 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1032 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1033 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1035 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1037 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1039 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1041 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1042 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1044 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1046 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1047 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1049 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1052 unsigned long offset = (unsigned long)c;
1053 offset += offsetof(struct btrfs_chunk, stripe);
1054 offset += nr * sizeof(struct btrfs_stripe);
1055 return (struct btrfs_stripe *)offset;
1058 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1060 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1063 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1064 struct btrfs_chunk *c, int nr)
1066 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1069 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1070 struct btrfs_chunk *c, int nr,
1073 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1076 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1077 struct btrfs_chunk *c, int nr)
1079 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1082 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1083 struct btrfs_chunk *c, int nr,
1086 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1089 /* struct btrfs_block_group_item */
1090 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1092 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1094 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1095 struct btrfs_block_group_item, chunk_objectid, 64);
1097 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1098 struct btrfs_block_group_item, chunk_objectid, 64);
1099 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1100 struct btrfs_block_group_item, flags, 64);
1101 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1102 struct btrfs_block_group_item, flags, 64);
1104 /* struct btrfs_inode_ref */
1105 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1106 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1108 /* struct btrfs_inode_item */
1109 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1110 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1111 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1112 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1113 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1114 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1115 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1116 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1117 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1118 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1119 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1120 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1123 static inline struct btrfs_timespec *
1124 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1126 unsigned long ptr = (unsigned long)inode_item;
1127 ptr += offsetof(struct btrfs_inode_item, atime);
1128 return (struct btrfs_timespec *)ptr;
1131 static inline struct btrfs_timespec *
1132 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1134 unsigned long ptr = (unsigned long)inode_item;
1135 ptr += offsetof(struct btrfs_inode_item, mtime);
1136 return (struct btrfs_timespec *)ptr;
1139 static inline struct btrfs_timespec *
1140 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1142 unsigned long ptr = (unsigned long)inode_item;
1143 ptr += offsetof(struct btrfs_inode_item, ctime);
1144 return (struct btrfs_timespec *)ptr;
1147 static inline struct btrfs_timespec *
1148 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1150 unsigned long ptr = (unsigned long)inode_item;
1151 ptr += offsetof(struct btrfs_inode_item, otime);
1152 return (struct btrfs_timespec *)ptr;
1155 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1156 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1158 /* struct btrfs_dev_extent */
1159 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1161 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1162 chunk_objectid, 64);
1163 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1165 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1167 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1169 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1170 return (u8 *)((unsigned long)dev + ptr);
1173 /* struct btrfs_extent_ref */
1174 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1175 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1176 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1177 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1179 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1180 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1182 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1184 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1187 /* struct btrfs_extent_item */
1188 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1189 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1192 /* struct btrfs_node */
1193 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1194 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1196 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1199 ptr = offsetof(struct btrfs_node, ptrs) +
1200 sizeof(struct btrfs_key_ptr) * nr;
1201 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1204 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1208 ptr = offsetof(struct btrfs_node, ptrs) +
1209 sizeof(struct btrfs_key_ptr) * nr;
1210 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1213 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1216 ptr = offsetof(struct btrfs_node, ptrs) +
1217 sizeof(struct btrfs_key_ptr) * nr;
1218 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1221 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1225 ptr = offsetof(struct btrfs_node, ptrs) +
1226 sizeof(struct btrfs_key_ptr) * nr;
1227 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1230 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1232 return offsetof(struct btrfs_node, ptrs) +
1233 sizeof(struct btrfs_key_ptr) * nr;
1236 void btrfs_node_key(struct extent_buffer *eb,
1237 struct btrfs_disk_key *disk_key, int nr);
1239 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1240 struct btrfs_disk_key *disk_key, int nr)
1243 ptr = btrfs_node_key_ptr_offset(nr);
1244 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1245 struct btrfs_key_ptr, key, disk_key);
1248 /* struct btrfs_item */
1249 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1250 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1252 static inline unsigned long btrfs_item_nr_offset(int nr)
1254 return offsetof(struct btrfs_leaf, items) +
1255 sizeof(struct btrfs_item) * nr;
1258 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1261 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1264 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1265 struct btrfs_item *item)
1267 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1270 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1272 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1275 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1277 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1280 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1282 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1285 static inline void btrfs_item_key(struct extent_buffer *eb,
1286 struct btrfs_disk_key *disk_key, int nr)
1288 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1289 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1292 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1293 struct btrfs_disk_key *disk_key, int nr)
1295 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1296 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1299 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1302 * struct btrfs_root_ref
1304 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1305 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1306 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1308 /* struct btrfs_dir_item */
1309 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1310 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1311 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1312 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1314 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1315 struct btrfs_dir_item *item,
1316 struct btrfs_disk_key *key)
1318 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1321 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1322 struct btrfs_dir_item *item,
1323 struct btrfs_disk_key *key)
1325 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1328 /* struct btrfs_disk_key */
1329 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1331 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1332 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1334 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1335 struct btrfs_disk_key *disk)
1337 cpu->offset = le64_to_cpu(disk->offset);
1338 cpu->type = disk->type;
1339 cpu->objectid = le64_to_cpu(disk->objectid);
1342 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1343 struct btrfs_key *cpu)
1345 disk->offset = cpu_to_le64(cpu->offset);
1346 disk->type = cpu->type;
1347 disk->objectid = cpu_to_le64(cpu->objectid);
1350 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1351 struct btrfs_key *key, int nr)
1353 struct btrfs_disk_key disk_key;
1354 btrfs_node_key(eb, &disk_key, nr);
1355 btrfs_disk_key_to_cpu(key, &disk_key);
1358 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1359 struct btrfs_key *key, int nr)
1361 struct btrfs_disk_key disk_key;
1362 btrfs_item_key(eb, &disk_key, nr);
1363 btrfs_disk_key_to_cpu(key, &disk_key);
1366 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1367 struct btrfs_dir_item *item,
1368 struct btrfs_key *key)
1370 struct btrfs_disk_key disk_key;
1371 btrfs_dir_item_key(eb, item, &disk_key);
1372 btrfs_disk_key_to_cpu(key, &disk_key);
1376 static inline u8 btrfs_key_type(struct btrfs_key *key)
1381 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1386 /* struct btrfs_header */
1387 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1388 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1390 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1391 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1392 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1393 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1395 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1397 return (btrfs_header_flags(eb) & flag) == flag;
1400 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1402 u64 flags = btrfs_header_flags(eb);
1403 btrfs_set_header_flags(eb, flags | flag);
1404 return (flags & flag) == flag;
1407 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1409 u64 flags = btrfs_header_flags(eb);
1410 btrfs_set_header_flags(eb, flags & ~flag);
1411 return (flags & flag) == flag;
1414 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1416 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1420 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1422 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1426 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1428 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1432 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1434 unsigned long ptr = offsetof(struct btrfs_header, csum);
1438 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1443 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1448 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1453 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1455 return (btrfs_header_level(eb) == 0);
1458 /* struct btrfs_root_item */
1459 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1461 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1462 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1463 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1465 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1467 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1468 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1469 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1470 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1471 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1472 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1473 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1474 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1477 /* struct btrfs_super_block */
1478 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1479 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1480 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1482 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1483 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1484 struct btrfs_super_block, sys_chunk_array_size, 32);
1485 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1486 struct btrfs_super_block, chunk_root_generation, 64);
1487 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1489 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1491 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1492 chunk_root_level, 8);
1493 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1495 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1497 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1499 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1501 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1503 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1505 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1507 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1509 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1510 root_dir_objectid, 64);
1511 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1514 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1516 return offsetof(struct btrfs_leaf, items);
1519 /* struct btrfs_file_extent_item */
1520 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1522 static inline unsigned long btrfs_file_extent_inline_start(struct
1523 btrfs_file_extent_item *e)
1525 unsigned long offset = (unsigned long)e;
1526 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1530 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1532 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1535 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1537 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1539 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1540 disk_num_bytes, 64);
1541 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1543 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1545 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1547 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1549 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1551 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1552 other_encoding, 16);
1554 /* this returns the number of file bytes represented by the inline item.
1555 * If an item is compressed, this is the uncompressed size
1557 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1558 struct btrfs_file_extent_item *e)
1560 return btrfs_file_extent_ram_bytes(eb, e);
1564 * this returns the number of bytes used by the item on disk, minus the
1565 * size of any extent headers. If a file is compressed on disk, this is
1566 * the compressed size
1568 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1569 struct btrfs_item *e)
1571 unsigned long offset;
1572 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1573 return btrfs_item_size(eb, e) - offset;
1576 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1578 return sb->s_fs_info;
1581 static inline int btrfs_set_root_name(struct btrfs_root *root,
1582 const char *name, int len)
1584 /* if we already have a name just free it */
1588 root->name = kmalloc(len+1, GFP_KERNEL);
1592 memcpy(root->name, name, len);
1593 root->name[len] ='\0';
1598 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1600 return root->leafsize;
1601 return root->nodesize;
1604 /* helper function to cast into the data area of the leaf. */
1605 #define btrfs_item_ptr(leaf, slot, type) \
1606 ((type *)(btrfs_leaf_data(leaf) + \
1607 btrfs_item_offset_nr(leaf, slot)))
1609 #define btrfs_item_ptr_offset(leaf, slot) \
1610 ((unsigned long)(btrfs_leaf_data(leaf) + \
1611 btrfs_item_offset_nr(leaf, slot)))
1613 static inline struct dentry *fdentry(struct file *file)
1615 return file->f_path.dentry;
1619 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1620 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1621 struct btrfs_root *root, u64 bytenr,
1622 u64 num_bytes, u32 *refs);
1623 int btrfs_update_pinned_extents(struct btrfs_root *root,
1624 u64 bytenr, u64 num, int pin);
1625 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1626 struct btrfs_root *root, struct extent_buffer *leaf);
1627 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
1628 struct btrfs_root *root, u64 bytenr);
1629 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root);
1631 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1632 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1633 btrfs_fs_info *info,
1635 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1636 struct btrfs_block_group_cache
1637 *hint, u64 search_start,
1638 int data, int owner);
1639 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1640 struct btrfs_root *root,
1641 u32 blocksize, u64 parent,
1647 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1648 struct btrfs_root *root,
1649 u64 bytenr, u32 blocksize);
1650 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1651 struct btrfs_root *root,
1652 u64 num_bytes, u64 parent, u64 min_bytes,
1653 u64 root_objectid, u64 ref_generation,
1654 u64 owner, u64 empty_size, u64 hint_byte,
1655 u64 search_end, struct btrfs_key *ins, u64 data);
1656 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1657 struct btrfs_root *root, u64 parent,
1658 u64 root_objectid, u64 ref_generation,
1659 u64 owner, struct btrfs_key *ins);
1660 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1661 struct btrfs_root *root, u64 parent,
1662 u64 root_objectid, u64 ref_generation,
1663 u64 owner, struct btrfs_key *ins);
1664 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1665 struct btrfs_root *root,
1666 u64 num_bytes, u64 min_alloc_size,
1667 u64 empty_size, u64 hint_byte,
1668 u64 search_end, struct btrfs_key *ins,
1670 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1671 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1673 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1674 struct extent_buffer *buf, u32 nr_extents);
1675 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1676 struct btrfs_root *root, struct extent_buffer *orig_buf,
1677 struct extent_buffer *buf, int start_slot, int nr);
1678 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1679 struct btrfs_root *root,
1680 u64 bytenr, u64 num_bytes, u64 parent,
1681 u64 root_objectid, u64 ref_generation,
1682 u64 owner_objectid, int pin);
1683 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1684 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1685 struct btrfs_root *root,
1686 struct extent_io_tree *unpin);
1687 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1688 struct btrfs_root *root,
1689 u64 bytenr, u64 num_bytes, u64 parent,
1690 u64 root_objectid, u64 ref_generation,
1691 u64 owner_objectid);
1692 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1693 struct btrfs_root *root, u64 bytenr,
1694 u64 orig_parent, u64 parent,
1695 u64 root_objectid, u64 ref_generation,
1696 u64 owner_objectid);
1697 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1698 struct btrfs_root *root);
1699 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1700 int btrfs_read_block_groups(struct btrfs_root *root);
1701 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root, u64 bytes_used,
1703 u64 type, u64 chunk_objectid, u64 chunk_offset,
1705 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1706 struct btrfs_root *root, u64 group_start);
1707 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1708 int btrfs_free_reloc_root(struct btrfs_trans_handle *trans,
1709 struct btrfs_root *root);
1710 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1711 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1712 struct btrfs_root *root,
1713 struct extent_buffer *buf, u64 orig_start);
1714 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1715 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1716 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
1718 int btrfs_previous_item(struct btrfs_root *root,
1719 struct btrfs_path *path, u64 min_objectid,
1721 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1722 struct btrfs_root *root,
1723 struct btrfs_key *node_keys,
1724 u64 *nodes, int lowest_level);
1725 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1726 struct btrfs_root *root, struct btrfs_path *path,
1727 struct btrfs_key *new_key);
1728 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1729 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1730 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1731 struct btrfs_key *key, int lowest_level,
1732 int cache_only, u64 min_trans);
1733 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1734 struct btrfs_key *max_key,
1735 struct btrfs_path *path, int cache_only,
1737 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1738 struct btrfs_root *root, struct extent_buffer *buf,
1739 struct extent_buffer *parent, int parent_slot,
1740 struct extent_buffer **cow_ret, u64 prealloc_dest);
1741 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1742 struct btrfs_root *root,
1743 struct extent_buffer *buf,
1744 struct extent_buffer **cow_ret, u64 new_root_objectid);
1745 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1746 *root, struct btrfs_path *path, u32 data_size);
1747 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1748 struct btrfs_root *root,
1749 struct btrfs_path *path,
1750 u32 new_size, int from_end);
1751 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1752 *root, struct btrfs_key *key, struct btrfs_path *p, int
1754 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root, struct extent_buffer *parent,
1756 int start_slot, int cache_only, u64 *last_ret,
1757 struct btrfs_key *progress);
1758 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1759 struct btrfs_path *btrfs_alloc_path(void);
1760 void btrfs_free_path(struct btrfs_path *p);
1761 void btrfs_init_path(struct btrfs_path *p);
1762 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1763 struct btrfs_path *path, int slot, int nr);
1764 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1765 struct btrfs_root *root,
1766 struct btrfs_path *path, u64 bytenr);
1767 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1768 struct btrfs_root *root,
1769 struct btrfs_path *path)
1771 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1774 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1775 *root, struct btrfs_key *key, void *data, u32 data_size);
1776 int btrfs_insert_some_items(struct btrfs_trans_handle *trans,
1777 struct btrfs_root *root,
1778 struct btrfs_path *path,
1779 struct btrfs_key *cpu_key, u32 *data_size,
1781 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1782 struct btrfs_root *root,
1783 struct btrfs_path *path,
1784 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1786 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1787 struct btrfs_root *root,
1788 struct btrfs_path *path,
1789 struct btrfs_key *key,
1792 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1795 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1796 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1797 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1798 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1800 int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
1801 struct btrfs_root *root,
1802 struct extent_buffer *node,
1803 struct extent_buffer *parent);
1805 int btrfs_find_root_ref(struct btrfs_root *tree_root,
1806 struct btrfs_path *path,
1807 u64 root_id, u64 ref_id);
1808 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1809 struct btrfs_root *tree_root,
1810 u64 root_id, u8 type, u64 ref_id,
1811 u64 dirid, u64 sequence,
1812 const char *name, int name_len);
1813 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1814 struct btrfs_key *key);
1815 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1816 *root, struct btrfs_key *key, struct btrfs_root_item
1818 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1819 *root, struct btrfs_key *key, struct btrfs_root_item
1821 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1822 btrfs_root_item *item, struct btrfs_key *key);
1823 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1824 u64 *found_objectid);
1825 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1826 struct btrfs_root *latest_root);
1828 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1829 *root, const char *name, int name_len, u64 dir,
1830 struct btrfs_key *location, u8 type, u64 index);
1831 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root,
1833 struct btrfs_path *path, u64 dir,
1834 const char *name, int name_len,
1836 struct btrfs_dir_item *
1837 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root,
1839 struct btrfs_path *path, u64 dir,
1840 u64 objectid, const char *name, int name_len,
1842 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1843 struct btrfs_path *path,
1844 const char *name, int name_len);
1845 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root,
1847 struct btrfs_path *path,
1848 struct btrfs_dir_item *di);
1849 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root, const char *name,
1851 u16 name_len, const void *data, u16 data_len,
1853 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root,
1855 struct btrfs_path *path, u64 dir,
1856 const char *name, u16 name_len,
1860 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1861 struct btrfs_root *root, u64 offset);
1862 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1863 struct btrfs_root *root, u64 offset);
1866 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1867 struct btrfs_root *fs_root,
1868 u64 dirid, u64 *objectid);
1869 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1872 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1873 struct btrfs_root *root,
1874 const char *name, int name_len,
1875 u64 inode_objectid, u64 ref_objectid, u64 index);
1876 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1877 struct btrfs_root *root,
1878 const char *name, int name_len,
1879 u64 inode_objectid, u64 ref_objectid, u64 *index);
1880 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1881 struct btrfs_root *root,
1882 struct btrfs_path *path, u64 objectid);
1883 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1884 *root, struct btrfs_path *path,
1885 struct btrfs_key *location, int mod);
1888 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1890 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1891 struct btrfs_root *root,
1892 u64 objectid, u64 pos,
1893 u64 disk_offset, u64 disk_num_bytes,
1894 u64 num_bytes, u64 offset, u64 ram_bytes,
1895 u8 compression, u8 encryption, u16 other_encoding);
1896 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1897 struct btrfs_root *root,
1898 struct btrfs_path *path, u64 objectid,
1899 u64 bytenr, int mod);
1900 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1901 struct btrfs_root *root, struct inode *inode,
1902 struct btrfs_ordered_sum *sums);
1903 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1905 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode,
1906 u64 start, unsigned long len);
1907 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1908 struct btrfs_root *root,
1909 struct btrfs_path *path,
1910 u64 objectid, u64 offset,
1912 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1913 struct btrfs_root *root, struct btrfs_path *path,
1917 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1918 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1919 #define ClearPageChecked ClearPageFsMisc
1920 #define SetPageChecked SetPageFsMisc
1921 #define PageChecked PageFsMisc
1924 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
1925 int btrfs_set_inode_index(struct inode *dir, u64 *index);
1926 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1927 struct btrfs_root *root,
1928 struct inode *dir, struct inode *inode,
1929 const char *name, int name_len);
1930 int btrfs_add_link(struct btrfs_trans_handle *trans,
1931 struct inode *parent_inode, struct inode *inode,
1932 const char *name, int name_len, int add_backref, u64 index);
1933 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1934 struct btrfs_root *root,
1935 struct inode *inode, u64 new_size,
1938 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1939 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1940 int btrfs_writepages(struct address_space *mapping,
1941 struct writeback_control *wbc);
1942 int btrfs_create_subvol_root(struct btrfs_root *new_root, struct dentry *dentry,
1943 struct btrfs_trans_handle *trans, u64 new_dirid,
1944 struct btrfs_block_group_cache *block_group);
1946 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1947 size_t size, struct bio *bio, unsigned long bio_flags);
1949 unsigned long btrfs_force_ra(struct address_space *mapping,
1950 struct file_ra_state *ra, struct file *file,
1951 pgoff_t offset, pgoff_t last_index);
1952 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1954 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1955 int btrfs_readpage(struct file *file, struct page *page);
1956 void btrfs_delete_inode(struct inode *inode);
1957 void btrfs_put_inode(struct inode *inode);
1958 void btrfs_read_locked_inode(struct inode *inode);
1959 int btrfs_write_inode(struct inode *inode, int wait);
1960 void btrfs_dirty_inode(struct inode *inode);
1961 struct inode *btrfs_alloc_inode(struct super_block *sb);
1962 void btrfs_destroy_inode(struct inode *inode);
1963 int btrfs_init_cachep(void);
1964 void btrfs_destroy_cachep(void);
1965 long btrfs_ioctl_trans_end(struct file *file);
1966 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1967 struct btrfs_root *root, int wait);
1968 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1969 struct btrfs_root *root);
1970 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1971 struct btrfs_root *root, int *is_new);
1972 int btrfs_commit_write(struct file *file, struct page *page,
1973 unsigned from, unsigned to);
1974 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1975 size_t page_offset, u64 start, u64 end,
1977 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1978 struct btrfs_root *root,
1979 struct inode *inode);
1980 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1981 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1982 void btrfs_orphan_cleanup(struct btrfs_root *root);
1983 int btrfs_cont_expand(struct inode *inode, loff_t size);
1986 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1989 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1990 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1992 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1993 extern struct file_operations btrfs_file_operations;
1994 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1995 struct btrfs_root *root, struct inode *inode,
1996 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1997 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root,
1999 struct inode *inode, u64 start, u64 end);
2000 int btrfs_release_file(struct inode *inode, struct file *file);
2003 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
2004 struct btrfs_root *root, int cache_only);
2007 int btrfs_init_sysfs(void);
2008 void btrfs_exit_sysfs(void);
2009 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
2010 int btrfs_sysfs_add_root(struct btrfs_root *root);
2011 void btrfs_sysfs_del_root(struct btrfs_root *root);
2012 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
2015 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
2018 u64 btrfs_parse_size(char *str);
2019 int btrfs_parse_options(struct btrfs_root *root, char *options);
2020 int btrfs_sync_fs(struct super_block *sb, int wait);
2023 int btrfs_check_acl(struct inode *inode, int mask);
2024 int btrfs_init_acl(struct inode *inode, struct inode *dir);
2025 int btrfs_acl_chmod(struct inode *inode);
2027 /* free-space-cache.c */
2028 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
2029 u64 bytenr, u64 size);
2030 int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group,
2031 u64 offset, u64 bytes);
2032 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
2033 u64 bytenr, u64 size);
2034 int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group,
2035 u64 offset, u64 bytes);
2036 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
2038 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
2039 *block_group, u64 offset,
2041 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
2043 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);