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 "_B9RfS_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 {
379 } __attribute__ ((__packed__));
381 /* dev extents record free space on individual devices. The owner
382 * field points back to the chunk allocation mapping tree that allocated
383 * the extent. The chunk tree uuid field is a way to double check the owner
385 struct btrfs_dev_extent {
387 __le64 chunk_objectid;
390 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
391 } __attribute__ ((__packed__));
393 struct btrfs_inode_ref {
397 } __attribute__ ((__packed__));
399 struct btrfs_timespec {
402 } __attribute__ ((__packed__));
405 * there is no padding here on purpose. If you want to extent the inode,
406 * make a new item type
408 struct btrfs_inode_item {
409 /* nfs style generation number */
411 /* transid that last touched this inode */
423 struct btrfs_timespec atime;
424 struct btrfs_timespec ctime;
425 struct btrfs_timespec mtime;
426 struct btrfs_timespec otime;
427 } __attribute__ ((__packed__));
429 struct btrfs_dir_log_item {
431 } __attribute__ ((__packed__));
433 struct btrfs_dir_item {
434 struct btrfs_disk_key location;
439 } __attribute__ ((__packed__));
441 struct btrfs_root_item {
442 struct btrfs_inode_item inode;
449 struct btrfs_disk_key drop_progress;
452 } __attribute__ ((__packed__));
454 #define BTRFS_FILE_EXTENT_REG 0
455 #define BTRFS_FILE_EXTENT_INLINE 1
457 struct btrfs_file_extent_item {
461 * disk space consumed by the extent, checksum blocks are included
465 __le64 disk_num_bytes;
467 * the logical offset in file blocks (no csums)
468 * this extent record is for. This allows a file extent to point
469 * into the middle of an existing extent on disk, sharing it
470 * between two snapshots (useful if some bytes in the middle of the
471 * extent have changed
475 * the logical number of file blocks (no csums included)
478 } __attribute__ ((__packed__));
480 struct btrfs_csum_item {
482 } __attribute__ ((__packed__));
484 /* different types of block groups (and chunks) */
485 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
486 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
487 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
488 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
489 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
490 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
491 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
493 struct btrfs_block_group_item {
495 __le64 chunk_objectid;
497 } __attribute__ ((__packed__));
499 struct btrfs_space_info {
507 struct list_head list;
509 /* for block groups in our same type */
510 struct list_head block_groups;
514 struct btrfs_free_space {
515 struct rb_node bytes_index;
516 struct rb_node offset_index;
521 struct btrfs_block_group_cache {
522 struct btrfs_key key;
523 struct btrfs_block_group_item item;
532 struct btrfs_space_info *space_info;
534 /* free space cache stuff */
535 struct rb_root free_space_bytes;
536 struct rb_root free_space_offset;
538 /* block group cache stuff */
539 struct rb_node cache_node;
541 /* for block groups in the same raid type */
542 struct list_head list;
545 struct btrfs_leaf_ref_tree {
547 struct list_head list;
552 struct btrfs_fs_devices;
553 struct btrfs_fs_info {
554 u8 fsid[BTRFS_FSID_SIZE];
555 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
556 struct btrfs_root *extent_root;
557 struct btrfs_root *tree_root;
558 struct btrfs_root *chunk_root;
559 struct btrfs_root *dev_root;
561 /* the log root tree is a directory of all the other log roots */
562 struct btrfs_root *log_root_tree;
563 struct radix_tree_root fs_roots_radix;
565 /* block group cache stuff */
566 spinlock_t block_group_cache_lock;
567 struct rb_root block_group_cache_tree;
569 struct extent_io_tree pinned_extents;
570 struct extent_io_tree pending_del;
571 struct extent_io_tree extent_ins;
573 /* logical->physical extent mapping */
574 struct btrfs_mapping_tree mapping_tree;
577 u64 last_trans_committed;
578 u64 last_trans_new_blockgroup;
579 u64 open_ioctl_trans;
580 unsigned long mount_opt;
584 struct btrfs_transaction *running_transaction;
585 wait_queue_head_t transaction_throttle;
586 wait_queue_head_t transaction_wait;
587 wait_queue_head_t async_submit_wait;
589 wait_queue_head_t tree_log_wait;
591 struct btrfs_super_block super_copy;
592 struct btrfs_super_block super_for_commit;
593 struct block_device *__bdev;
594 struct super_block *sb;
595 struct inode *btree_inode;
596 struct backing_dev_info bdi;
597 spinlock_t hash_lock;
598 struct mutex trans_mutex;
599 struct mutex tree_log_mutex;
600 struct mutex transaction_kthread_mutex;
601 struct mutex cleaner_mutex;
602 struct mutex alloc_mutex;
603 struct mutex chunk_mutex;
604 struct mutex drop_mutex;
605 struct mutex volume_mutex;
606 struct mutex tree_reloc_mutex;
607 struct list_head trans_list;
608 struct list_head hashers;
609 struct list_head dead_roots;
611 atomic_t nr_async_submits;
612 atomic_t async_submit_draining;
613 atomic_t nr_async_bios;
614 atomic_t tree_log_writers;
615 atomic_t tree_log_commit;
616 unsigned long tree_log_batch;
617 u64 tree_log_transid;
620 * this is used by the balancing code to wait for all the pending
623 spinlock_t ordered_extent_lock;
624 struct list_head ordered_extents;
625 struct list_head delalloc_inodes;
628 * there is a pool of worker threads for checksumming during writes
629 * and a pool for checksumming after reads. This is because readers
630 * can run with FS locks held, and the writers may be waiting for
631 * those locks. We don't want ordering in the pending list to cause
632 * deadlocks, and so the two are serviced separately.
634 * A third pool does submit_bio to avoid deadlocking with the other
637 struct btrfs_workers workers;
638 struct btrfs_workers endio_workers;
639 struct btrfs_workers endio_write_workers;
640 struct btrfs_workers submit_workers;
642 * fixup workers take dirty pages that didn't properly go through
643 * the cow mechanism and make them safe to write. It happens
644 * for the sys_munmap function call path
646 struct btrfs_workers fixup_workers;
647 struct task_struct *transaction_kthread;
648 struct task_struct *cleaner_kthread;
649 int thread_pool_size;
651 /* tree relocation relocated fields */
652 struct extent_io_tree reloc_mapping_tree;
653 struct list_head dead_reloc_roots;
654 struct btrfs_leaf_ref_tree reloc_ref_tree;
655 struct btrfs_leaf_ref_tree shared_ref_tree;
657 struct kobject super_kobj;
658 struct completion kobj_unregister;
661 int log_root_recovering;
663 atomic_t throttle_gen;
666 struct list_head dirty_cowonly_roots;
668 struct btrfs_fs_devices *fs_devices;
669 struct list_head space_info;
670 spinlock_t delalloc_lock;
671 spinlock_t new_trans_lock;
676 spinlock_t ref_cache_lock;
677 u64 total_ref_cache_size;
679 u64 avail_data_alloc_bits;
680 u64 avail_metadata_alloc_bits;
681 u64 avail_system_alloc_bits;
682 u64 data_alloc_profile;
683 u64 metadata_alloc_profile;
684 u64 system_alloc_profile;
690 * in ram representation of the tree. extent_root is used for all allocations
691 * and for the extent tree extent_root root.
693 struct btrfs_dirty_root;
695 struct extent_buffer *node;
697 /* the node lock is held while changing the node pointer */
698 spinlock_t node_lock;
700 struct extent_buffer *commit_root;
701 struct btrfs_leaf_ref_tree *ref_tree;
702 struct btrfs_leaf_ref_tree ref_tree_struct;
703 struct btrfs_dirty_root *dirty_root;
704 struct btrfs_root *log_root;
705 struct btrfs_root *reloc_root;
707 struct btrfs_root_item root_item;
708 struct btrfs_key root_key;
709 struct btrfs_fs_info *fs_info;
711 struct extent_io_tree dirty_log_pages;
713 struct kobject root_kobj;
714 struct completion kobj_unregister;
715 struct mutex objectid_mutex;
716 struct mutex log_mutex;
721 /* data allocations are done in sectorsize units */
724 /* node allocations are done in nodesize units */
727 /* leaf allocations are done in leafsize units */
734 u64 last_inode_alloc;
737 u64 defrag_trans_start;
738 struct btrfs_key defrag_progress;
739 struct btrfs_key defrag_max;
745 /* the dirty list is only used by non-reference counted roots */
746 struct list_head dirty_list;
748 spinlock_t list_lock;
749 struct list_head dead_list;
750 struct list_head orphan_list;
755 * inode items have the data typically returned from stat and store other
756 * info about object characteristics. There is one for every file and dir in
759 #define BTRFS_INODE_ITEM_KEY 1
760 #define BTRFS_INODE_REF_KEY 2
761 #define BTRFS_XATTR_ITEM_KEY 8
762 #define BTRFS_ORPHAN_ITEM_KEY 9
763 /* reserve 2-15 close to the inode for later flexibility */
766 * dir items are the name -> inode pointers in a directory. There is one
767 * for every name in a directory.
769 #define BTRFS_DIR_LOG_ITEM_KEY 14
770 #define BTRFS_DIR_LOG_INDEX_KEY 15
771 #define BTRFS_DIR_ITEM_KEY 16
772 #define BTRFS_DIR_INDEX_KEY 17
774 * extent data is for file data
776 #define BTRFS_EXTENT_DATA_KEY 18
778 * csum items have the checksums for data in the extents
780 #define BTRFS_CSUM_ITEM_KEY 19
783 /* reserve 21-31 for other file/dir stuff */
786 * root items point to tree roots. There are typically in the root
787 * tree used by the super block to find all the other trees
789 #define BTRFS_ROOT_ITEM_KEY 32
791 * extent items are in the extent map tree. These record which blocks
792 * are used, and how many references there are to each block
794 #define BTRFS_EXTENT_ITEM_KEY 33
795 #define BTRFS_EXTENT_REF_KEY 34
798 * block groups give us hints into the extent allocation trees. Which
799 * blocks are free etc etc
801 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
803 #define BTRFS_DEV_EXTENT_KEY 75
804 #define BTRFS_DEV_ITEM_KEY 76
805 #define BTRFS_CHUNK_ITEM_KEY 77
808 * string items are for debugging. They just store a short string of
811 #define BTRFS_STRING_ITEM_KEY 253
813 #define BTRFS_MOUNT_NODATASUM (1 << 0)
814 #define BTRFS_MOUNT_NODATACOW (1 << 1)
815 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
816 #define BTRFS_MOUNT_SSD (1 << 3)
817 #define BTRFS_MOUNT_DEGRADED (1 << 4)
819 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
820 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
821 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
826 #define BTRFS_INODE_NODATASUM (1 << 0)
827 #define BTRFS_INODE_NODATACOW (1 << 1)
828 #define BTRFS_INODE_READONLY (1 << 2)
829 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
831 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
833 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
835 /* some macros to generate set/get funcs for the struct fields. This
836 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
839 #define le8_to_cpu(v) (v)
840 #define cpu_to_le8(v) (v)
843 #define read_eb_member(eb, ptr, type, member, result) ( \
844 read_extent_buffer(eb, (char *)(result), \
845 ((unsigned long)(ptr)) + \
846 offsetof(type, member), \
847 sizeof(((type *)0)->member)))
849 #define write_eb_member(eb, ptr, type, member, result) ( \
850 write_extent_buffer(eb, (char *)(result), \
851 ((unsigned long)(ptr)) + \
852 offsetof(type, member), \
853 sizeof(((type *)0)->member)))
855 #ifndef BTRFS_SETGET_FUNCS
856 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
857 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
858 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
861 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
862 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
864 type *p = kmap_atomic(eb->first_page, KM_USER0); \
865 u##bits res = le##bits##_to_cpu(p->member); \
866 kunmap_atomic(p, KM_USER0); \
869 static inline void btrfs_set_##name(struct extent_buffer *eb, \
872 type *p = kmap_atomic(eb->first_page, KM_USER0); \
873 p->member = cpu_to_le##bits(val); \
874 kunmap_atomic(p, KM_USER0); \
877 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
878 static inline u##bits btrfs_##name(type *s) \
880 return le##bits##_to_cpu(s->member); \
882 static inline void btrfs_set_##name(type *s, u##bits val) \
884 s->member = cpu_to_le##bits(val); \
887 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
888 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
889 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
890 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
891 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
892 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
893 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
894 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
895 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
896 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
898 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
899 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
901 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
903 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
905 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
907 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
909 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
910 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
912 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
914 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
917 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
919 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
922 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
923 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
924 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
925 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
926 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
927 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
928 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
929 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
930 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
931 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
932 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
934 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
936 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
939 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
940 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
941 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
943 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
945 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
947 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
949 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
950 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
952 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
954 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
955 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
957 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
960 unsigned long offset = (unsigned long)c;
961 offset += offsetof(struct btrfs_chunk, stripe);
962 offset += nr * sizeof(struct btrfs_stripe);
963 return (struct btrfs_stripe *)offset;
966 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
968 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
971 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
972 struct btrfs_chunk *c, int nr)
974 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
977 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
978 struct btrfs_chunk *c, int nr,
981 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
984 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
985 struct btrfs_chunk *c, int nr)
987 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
990 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
991 struct btrfs_chunk *c, int nr,
994 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
997 /* struct btrfs_block_group_item */
998 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1000 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1002 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1003 struct btrfs_block_group_item, chunk_objectid, 64);
1005 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1006 struct btrfs_block_group_item, chunk_objectid, 64);
1007 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1008 struct btrfs_block_group_item, flags, 64);
1009 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1010 struct btrfs_block_group_item, flags, 64);
1012 /* struct btrfs_inode_ref */
1013 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1014 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1016 /* struct btrfs_inode_item */
1017 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1018 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1019 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1020 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1021 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1022 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1023 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1024 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1025 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1026 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1027 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1028 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1031 static inline struct btrfs_timespec *
1032 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1034 unsigned long ptr = (unsigned long)inode_item;
1035 ptr += offsetof(struct btrfs_inode_item, atime);
1036 return (struct btrfs_timespec *)ptr;
1039 static inline struct btrfs_timespec *
1040 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1042 unsigned long ptr = (unsigned long)inode_item;
1043 ptr += offsetof(struct btrfs_inode_item, mtime);
1044 return (struct btrfs_timespec *)ptr;
1047 static inline struct btrfs_timespec *
1048 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1050 unsigned long ptr = (unsigned long)inode_item;
1051 ptr += offsetof(struct btrfs_inode_item, ctime);
1052 return (struct btrfs_timespec *)ptr;
1055 static inline struct btrfs_timespec *
1056 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1058 unsigned long ptr = (unsigned long)inode_item;
1059 ptr += offsetof(struct btrfs_inode_item, otime);
1060 return (struct btrfs_timespec *)ptr;
1063 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1064 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1066 /* struct btrfs_dev_extent */
1067 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1069 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1070 chunk_objectid, 64);
1071 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1073 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1075 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1077 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1078 return (u8 *)((unsigned long)dev + ptr);
1081 /* struct btrfs_extent_ref */
1082 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1083 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1084 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1085 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1086 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1088 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1089 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1091 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1093 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref,
1095 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1098 /* struct btrfs_extent_item */
1099 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1100 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1103 /* struct btrfs_node */
1104 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1105 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1107 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1110 ptr = offsetof(struct btrfs_node, ptrs) +
1111 sizeof(struct btrfs_key_ptr) * nr;
1112 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1115 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1119 ptr = offsetof(struct btrfs_node, ptrs) +
1120 sizeof(struct btrfs_key_ptr) * nr;
1121 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1124 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1127 ptr = offsetof(struct btrfs_node, ptrs) +
1128 sizeof(struct btrfs_key_ptr) * nr;
1129 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1132 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1136 ptr = offsetof(struct btrfs_node, ptrs) +
1137 sizeof(struct btrfs_key_ptr) * nr;
1138 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1141 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1143 return offsetof(struct btrfs_node, ptrs) +
1144 sizeof(struct btrfs_key_ptr) * nr;
1147 void btrfs_node_key(struct extent_buffer *eb,
1148 struct btrfs_disk_key *disk_key, int nr);
1150 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1151 struct btrfs_disk_key *disk_key, int nr)
1154 ptr = btrfs_node_key_ptr_offset(nr);
1155 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1156 struct btrfs_key_ptr, key, disk_key);
1159 /* struct btrfs_item */
1160 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1161 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1163 static inline unsigned long btrfs_item_nr_offset(int nr)
1165 return offsetof(struct btrfs_leaf, items) +
1166 sizeof(struct btrfs_item) * nr;
1169 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1172 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1175 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1176 struct btrfs_item *item)
1178 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1181 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1183 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1186 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1188 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1191 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1193 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1196 static inline void btrfs_item_key(struct extent_buffer *eb,
1197 struct btrfs_disk_key *disk_key, int nr)
1199 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1200 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1203 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1204 struct btrfs_disk_key *disk_key, int nr)
1206 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1207 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1210 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1212 /* struct btrfs_dir_item */
1213 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1214 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1215 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1216 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1218 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1219 struct btrfs_dir_item *item,
1220 struct btrfs_disk_key *key)
1222 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1225 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1226 struct btrfs_dir_item *item,
1227 struct btrfs_disk_key *key)
1229 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1232 /* struct btrfs_disk_key */
1233 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1235 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1236 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1238 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1239 struct btrfs_disk_key *disk)
1241 cpu->offset = le64_to_cpu(disk->offset);
1242 cpu->type = disk->type;
1243 cpu->objectid = le64_to_cpu(disk->objectid);
1246 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1247 struct btrfs_key *cpu)
1249 disk->offset = cpu_to_le64(cpu->offset);
1250 disk->type = cpu->type;
1251 disk->objectid = cpu_to_le64(cpu->objectid);
1254 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1255 struct btrfs_key *key, int nr)
1257 struct btrfs_disk_key disk_key;
1258 btrfs_node_key(eb, &disk_key, nr);
1259 btrfs_disk_key_to_cpu(key, &disk_key);
1262 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1263 struct btrfs_key *key, int nr)
1265 struct btrfs_disk_key disk_key;
1266 btrfs_item_key(eb, &disk_key, nr);
1267 btrfs_disk_key_to_cpu(key, &disk_key);
1270 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1271 struct btrfs_dir_item *item,
1272 struct btrfs_key *key)
1274 struct btrfs_disk_key disk_key;
1275 btrfs_dir_item_key(eb, item, &disk_key);
1276 btrfs_disk_key_to_cpu(key, &disk_key);
1280 static inline u8 btrfs_key_type(struct btrfs_key *key)
1285 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1290 /* struct btrfs_header */
1291 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1292 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1294 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1295 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1296 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1297 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1299 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1301 return (btrfs_header_flags(eb) & flag) == flag;
1304 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1306 u64 flags = btrfs_header_flags(eb);
1307 btrfs_set_header_flags(eb, flags | flag);
1308 return (flags & flag) == flag;
1311 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1313 u64 flags = btrfs_header_flags(eb);
1314 btrfs_set_header_flags(eb, flags & ~flag);
1315 return (flags & flag) == flag;
1318 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1320 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1324 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1326 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1330 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1332 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1336 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1338 unsigned long ptr = offsetof(struct btrfs_header, csum);
1342 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1347 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1352 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1357 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1359 return (btrfs_header_level(eb) == 0);
1362 /* struct btrfs_root_item */
1363 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1364 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1365 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1367 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1368 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1369 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1370 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1371 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1372 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1373 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1375 /* struct btrfs_super_block */
1376 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1377 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1378 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1380 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1381 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1382 struct btrfs_super_block, sys_chunk_array_size, 32);
1383 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1385 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1387 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1388 chunk_root_level, 8);
1389 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1391 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1393 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1395 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1397 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1399 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1401 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1403 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1405 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1406 root_dir_objectid, 64);
1407 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1410 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1412 return offsetof(struct btrfs_leaf, items);
1415 /* struct btrfs_file_extent_item */
1416 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1418 static inline unsigned long btrfs_file_extent_inline_start(struct
1419 btrfs_file_extent_item *e)
1421 unsigned long offset = (unsigned long)e;
1422 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1426 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1428 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1431 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1432 struct btrfs_item *e)
1434 unsigned long offset;
1435 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1436 return btrfs_item_size(eb, e) - offset;
1439 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1441 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1443 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1444 disk_num_bytes, 64);
1445 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1447 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1450 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1452 return sb->s_fs_info;
1455 static inline int btrfs_set_root_name(struct btrfs_root *root,
1456 const char *name, int len)
1458 /* if we already have a name just free it */
1462 root->name = kmalloc(len+1, GFP_KERNEL);
1466 memcpy(root->name, name, len);
1467 root->name[len] ='\0';
1472 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1474 return root->leafsize;
1475 return root->nodesize;
1478 /* helper function to cast into the data area of the leaf. */
1479 #define btrfs_item_ptr(leaf, slot, type) \
1480 ((type *)(btrfs_leaf_data(leaf) + \
1481 btrfs_item_offset_nr(leaf, slot)))
1483 #define btrfs_item_ptr_offset(leaf, slot) \
1484 ((unsigned long)(btrfs_leaf_data(leaf) + \
1485 btrfs_item_offset_nr(leaf, slot)))
1487 static inline struct dentry *fdentry(struct file *file)
1489 return file->f_path.dentry;
1493 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1494 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1495 struct btrfs_root *root, u64 bytenr,
1496 u64 num_bytes, u32 *refs);
1497 int btrfs_update_pinned_extents(struct btrfs_root *root,
1498 u64 bytenr, u64 num, int pin);
1499 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1500 struct btrfs_root *root, struct extent_buffer *leaf);
1501 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1502 struct btrfs_root *root,
1503 struct btrfs_key *key, u64 bytenr);
1504 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root);
1506 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1507 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1508 btrfs_fs_info *info,
1510 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1511 struct btrfs_block_group_cache
1512 *hint, u64 search_start,
1513 int data, int owner);
1514 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root,
1516 u32 blocksize, u64 parent,
1522 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1523 struct btrfs_root *root,
1524 u64 bytenr, u32 blocksize);
1525 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root,
1527 struct btrfs_path *path,
1528 u64 bytenr, u64 parent,
1529 u64 root_objectid, u64 ref_generation,
1530 u64 owner, u64 owner_offset);
1531 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root,
1533 u64 num_bytes, u64 parent, u64 min_bytes,
1534 u64 root_objectid, u64 ref_generation,
1535 u64 owner, u64 owner_offset,
1536 u64 empty_size, u64 hint_byte,
1537 u64 search_end, struct btrfs_key *ins, u64 data);
1538 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1539 struct btrfs_root *root, u64 parent,
1540 u64 root_objectid, u64 ref_generation,
1541 u64 owner, u64 owner_offset,
1542 struct btrfs_key *ins);
1543 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1544 struct btrfs_root *root, u64 parent,
1545 u64 root_objectid, u64 ref_generation,
1546 u64 owner, u64 owner_offset,
1547 struct btrfs_key *ins);
1548 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1549 struct btrfs_root *root,
1550 u64 num_bytes, u64 min_alloc_size,
1551 u64 empty_size, u64 hint_byte,
1552 u64 search_end, struct btrfs_key *ins,
1554 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1555 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1557 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1558 struct extent_buffer *buf, u32 nr_extents);
1559 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1560 struct btrfs_root *root, struct extent_buffer *orig_buf,
1561 struct extent_buffer *buf, int start_slot, int nr);
1562 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1563 struct btrfs_root *root,
1564 u64 bytenr, u64 num_bytes, u64 parent,
1565 u64 root_objectid, u64 ref_generation,
1566 u64 owner_objectid, u64 owner_offset, int pin);
1567 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1568 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1569 struct btrfs_root *root,
1570 struct extent_io_tree *unpin);
1571 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1572 struct btrfs_root *root,
1573 u64 bytenr, u64 num_bytes, u64 parent,
1574 u64 root_objectid, u64 ref_generation,
1575 u64 owner, u64 owner_offset);
1576 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1577 struct btrfs_root *root, u64 bytenr,
1578 u64 orig_parent, u64 parent,
1579 u64 root_objectid, u64 ref_generation,
1580 u64 owner, u64 owner_offset);
1581 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1582 struct btrfs_root *root);
1583 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1584 int btrfs_read_block_groups(struct btrfs_root *root);
1585 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1586 struct btrfs_root *root, u64 bytes_used,
1587 u64 type, u64 chunk_objectid, u64 chunk_offset,
1589 int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root, u64 group_start);
1591 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start);
1592 int btrfs_free_reloc_root(struct btrfs_root *root);
1593 int btrfs_drop_dead_reloc_roots(struct btrfs_root *root);
1594 int btrfs_add_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1595 u64 num_bytes, u64 new_bytenr);
1596 int btrfs_get_reloc_mapping(struct btrfs_root *root, u64 orig_bytenr,
1597 u64 num_bytes, u64 *new_bytenr);
1598 void btrfs_free_reloc_mappings(struct btrfs_root *root);
1599 int btrfs_reloc_tree_cache_ref(struct btrfs_trans_handle *trans,
1600 struct btrfs_root *root,
1601 struct extent_buffer *buf, u64 orig_start);
1602 int btrfs_add_dead_reloc_root(struct btrfs_root *root);
1603 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
1605 int btrfs_previous_item(struct btrfs_root *root,
1606 struct btrfs_path *path, u64 min_objectid,
1608 int btrfs_merge_path(struct btrfs_trans_handle *trans,
1609 struct btrfs_root *root,
1610 struct btrfs_key *node_keys,
1611 u64 *nodes, int lowest_level);
1612 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1613 struct btrfs_root *root, struct btrfs_path *path,
1614 struct btrfs_key *new_key);
1615 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1616 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1617 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1618 struct btrfs_key *key, int lowest_level,
1619 int cache_only, u64 min_trans);
1620 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1621 struct btrfs_key *max_key,
1622 struct btrfs_path *path, int cache_only,
1624 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1625 struct btrfs_root *root, struct extent_buffer *buf,
1626 struct extent_buffer *parent, int parent_slot,
1627 struct extent_buffer **cow_ret, u64 prealloc_dest);
1628 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1629 struct btrfs_root *root,
1630 struct extent_buffer *buf,
1631 struct extent_buffer **cow_ret, u64 new_root_objectid);
1632 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1633 *root, struct btrfs_path *path, u32 data_size);
1634 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1635 struct btrfs_root *root,
1636 struct btrfs_path *path,
1637 u32 new_size, int from_end);
1638 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1639 *root, struct btrfs_key *key, struct btrfs_path *p, int
1641 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1642 struct btrfs_root *root, struct extent_buffer *parent,
1643 int start_slot, int cache_only, u64 *last_ret,
1644 struct btrfs_key *progress);
1645 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1646 struct btrfs_path *btrfs_alloc_path(void);
1647 void btrfs_free_path(struct btrfs_path *p);
1648 void btrfs_init_path(struct btrfs_path *p);
1649 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1650 struct btrfs_path *path, int slot, int nr);
1651 int btrfs_del_leaf(struct btrfs_trans_handle *trans,
1652 struct btrfs_root *root,
1653 struct btrfs_path *path, u64 bytenr);
1654 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1655 struct btrfs_root *root,
1656 struct btrfs_path *path)
1658 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1661 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1662 *root, struct btrfs_key *key, void *data, u32 data_size);
1663 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1664 struct btrfs_root *root,
1665 struct btrfs_path *path,
1666 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1668 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1669 struct btrfs_root *root,
1670 struct btrfs_path *path,
1671 struct btrfs_key *key,
1674 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1677 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1678 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1679 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1680 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1683 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1684 struct btrfs_key *key);
1685 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1686 *root, struct btrfs_key *key, struct btrfs_root_item
1688 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1689 *root, struct btrfs_key *key, struct btrfs_root_item
1691 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1692 btrfs_root_item *item, struct btrfs_key *key);
1693 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1694 u64 *found_objectid);
1695 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1696 struct btrfs_root *latest_root);
1698 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1699 *root, const char *name, int name_len, u64 dir,
1700 struct btrfs_key *location, u8 type, u64 index);
1701 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1702 struct btrfs_root *root,
1703 struct btrfs_path *path, u64 dir,
1704 const char *name, int name_len,
1706 struct btrfs_dir_item *
1707 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1708 struct btrfs_root *root,
1709 struct btrfs_path *path, u64 dir,
1710 u64 objectid, const char *name, int name_len,
1712 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1713 struct btrfs_path *path,
1714 const char *name, int name_len);
1715 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root,
1717 struct btrfs_path *path,
1718 struct btrfs_dir_item *di);
1719 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1720 struct btrfs_root *root, const char *name,
1721 u16 name_len, const void *data, u16 data_len,
1723 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1724 struct btrfs_root *root,
1725 struct btrfs_path *path, u64 dir,
1726 const char *name, u16 name_len,
1730 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1731 struct btrfs_root *root, u64 offset);
1732 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1733 struct btrfs_root *root, u64 offset);
1736 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1737 struct btrfs_root *fs_root,
1738 u64 dirid, u64 *objectid);
1739 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1742 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1743 struct btrfs_root *root,
1744 const char *name, int name_len,
1745 u64 inode_objectid, u64 ref_objectid, u64 index);
1746 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1747 struct btrfs_root *root,
1748 const char *name, int name_len,
1749 u64 inode_objectid, u64 ref_objectid, u64 *index);
1750 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1751 struct btrfs_root *root,
1752 struct btrfs_path *path, u64 objectid);
1753 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1754 *root, struct btrfs_path *path,
1755 struct btrfs_key *location, int mod);
1758 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1760 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1761 struct btrfs_root *root,
1762 u64 objectid, u64 pos, u64 disk_offset,
1764 u64 num_bytes, u64 offset);
1765 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1766 struct btrfs_root *root,
1767 struct btrfs_path *path, u64 objectid,
1768 u64 bytenr, int mod);
1769 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1770 struct btrfs_root *root, struct inode *inode,
1771 struct btrfs_ordered_sum *sums);
1772 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1774 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1775 struct btrfs_root *root,
1776 struct btrfs_path *path,
1777 u64 objectid, u64 offset,
1779 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1780 struct btrfs_root *root, struct btrfs_path *path,
1784 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1785 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1786 #define ClearPageChecked ClearPageFsMisc
1787 #define SetPageChecked SetPageFsMisc
1788 #define PageChecked PageFsMisc
1791 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1792 struct btrfs_root *root,
1793 struct inode *dir, struct inode *inode,
1794 const char *name, int name_len);
1795 int btrfs_add_link(struct btrfs_trans_handle *trans,
1796 struct inode *parent_inode, struct inode *inode,
1797 const char *name, int name_len, int add_backref, u64 index);
1798 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1799 struct btrfs_root *root,
1800 struct inode *inode, u64 new_size,
1803 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1804 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1805 int btrfs_writepages(struct address_space *mapping,
1806 struct writeback_control *wbc);
1807 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1808 struct btrfs_trans_handle *trans, u64 new_dirid,
1809 struct btrfs_block_group_cache *block_group);
1811 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1814 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1815 size_t size, struct bio *bio);
1817 unsigned long btrfs_force_ra(struct address_space *mapping,
1818 struct file_ra_state *ra, struct file *file,
1819 pgoff_t offset, pgoff_t last_index);
1820 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1822 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1823 int btrfs_readpage(struct file *file, struct page *page);
1824 void btrfs_delete_inode(struct inode *inode);
1825 void btrfs_put_inode(struct inode *inode);
1826 void btrfs_read_locked_inode(struct inode *inode);
1827 int btrfs_write_inode(struct inode *inode, int wait);
1828 void btrfs_dirty_inode(struct inode *inode);
1829 struct inode *btrfs_alloc_inode(struct super_block *sb);
1830 void btrfs_destroy_inode(struct inode *inode);
1831 int btrfs_init_cachep(void);
1832 void btrfs_destroy_cachep(void);
1833 long btrfs_ioctl_trans_end(struct file *file);
1834 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1835 struct btrfs_root *root, int wait);
1836 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1837 struct btrfs_root *root);
1838 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1839 struct btrfs_root *root, int *is_new);
1840 int btrfs_commit_write(struct file *file, struct page *page,
1841 unsigned from, unsigned to);
1842 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1843 size_t page_offset, u64 start, u64 end,
1845 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root,
1847 struct inode *inode);
1848 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1849 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1850 void btrfs_orphan_cleanup(struct btrfs_root *root);
1853 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1856 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1857 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1859 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1860 extern struct file_operations btrfs_file_operations;
1861 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1862 struct btrfs_root *root, struct inode *inode,
1863 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1864 int btrfs_release_file(struct inode *inode, struct file *file);
1867 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1868 struct btrfs_root *root, int cache_only);
1871 int btrfs_init_sysfs(void);
1872 void btrfs_exit_sysfs(void);
1873 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1874 int btrfs_sysfs_add_root(struct btrfs_root *root);
1875 void btrfs_sysfs_del_root(struct btrfs_root *root);
1876 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1879 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1882 u64 btrfs_parse_size(char *str);
1883 int btrfs_parse_options(struct btrfs_root *root, char *options);
1884 int btrfs_sync_fs(struct super_block *sb, int wait);
1887 int btrfs_check_acl(struct inode *inode, int mask);
1888 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1889 int btrfs_acl_chmod(struct inode *inode);
1891 /* free-space-cache.c */
1892 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1893 u64 bytenr, u64 size);
1894 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1895 u64 bytenr, u64 size);
1896 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1898 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1899 *block_group, u64 offset,
1901 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1903 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);