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 "bit-radix.h"
31 #include "extent_io.h"
32 #include "extent_map.h"
33 #include "async-thread.h"
35 struct btrfs_trans_handle;
36 struct btrfs_transaction;
37 extern struct kmem_cache *btrfs_trans_handle_cachep;
38 extern struct kmem_cache *btrfs_transaction_cachep;
39 extern struct kmem_cache *btrfs_bit_radix_cachep;
40 extern struct kmem_cache *btrfs_path_cachep;
41 struct btrfs_ordered_sum;
43 #define BTRFS_MAGIC "_B9RfS_M"
45 #define BTRFS_ACL_NOT_CACHED ((void *)-1)
48 # define BTRFS_MAX_LEVEL 7
50 # define BTRFS_MAX_LEVEL 8
53 /* holds pointers to all of the tree roots */
54 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
56 /* stores information about which extents are in use, and reference counts */
57 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
60 * chunk tree stores translations from logical -> physical block numbering
61 * the super block points to the chunk tree
63 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
66 * stores information about which areas of a given device are in use.
67 * one per device. The tree of tree roots points to the device tree
69 #define BTRFS_DEV_TREE_OBJECTID 4ULL
71 /* one per subvolume, storing files and directories */
72 #define BTRFS_FS_TREE_OBJECTID 5ULL
74 /* directory objectid inside the root tree */
75 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
77 /* orhpan objectid for tracking unlinked/truncated files */
78 #define BTRFS_ORPHAN_OBJECTID -5ULL
80 /* does write ahead logging to speed up fsyncs */
81 #define BTRFS_TREE_LOG_OBJECTID -6ULL
82 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
84 /* for space balancing */
85 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
86 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
88 /* dummy objectid represents multiple objectids */
89 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
92 * All files have objectids in this range.
94 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
95 #define BTRFS_LAST_FREE_OBJECTID -256ULL
96 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
100 * the device items go into the chunk tree. The key is in the form
101 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
103 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
106 * we can actually store much bigger names, but lets not confuse the rest
109 #define BTRFS_NAME_LEN 255
111 /* 32 bytes in various csum fields */
112 #define BTRFS_CSUM_SIZE 32
113 /* four bytes for CRC32 */
114 #define BTRFS_CRC32_SIZE 4
115 #define BTRFS_EMPTY_DIR_SIZE 0
117 #define BTRFS_FT_UNKNOWN 0
118 #define BTRFS_FT_REG_FILE 1
119 #define BTRFS_FT_DIR 2
120 #define BTRFS_FT_CHRDEV 3
121 #define BTRFS_FT_BLKDEV 4
122 #define BTRFS_FT_FIFO 5
123 #define BTRFS_FT_SOCK 6
124 #define BTRFS_FT_SYMLINK 7
125 #define BTRFS_FT_XATTR 8
126 #define BTRFS_FT_MAX 9
129 * the key defines the order in the tree, and so it also defines (optimal)
130 * block layout. objectid corresonds to the inode number. The flags
131 * tells us things about the object, and is a kind of stream selector.
132 * so for a given inode, keys with flags of 1 might refer to the inode
133 * data, flags of 2 may point to file data in the btree and flags == 3
134 * may point to extents.
136 * offset is the starting byte offset for this key in the stream.
138 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
139 * in cpu native order. Otherwise they are identical and their sizes
140 * should be the same (ie both packed)
142 struct btrfs_disk_key {
146 } __attribute__ ((__packed__));
152 } __attribute__ ((__packed__));
154 struct btrfs_mapping_tree {
155 struct extent_map_tree map_tree;
158 #define BTRFS_UUID_SIZE 16
159 struct btrfs_dev_item {
160 /* the internal btrfs device id */
163 /* size of the device */
169 /* optimal io alignment for this device */
172 /* optimal io width for this device */
175 /* minimal io size for this device */
178 /* type and info about this device */
181 /* grouping information for allocation decisions */
184 /* seek speed 0-100 where 100 is fastest */
187 /* bandwidth 0-100 where 100 is fastest */
190 /* btrfs generated uuid for this device */
191 u8 uuid[BTRFS_UUID_SIZE];
192 } __attribute__ ((__packed__));
194 struct btrfs_stripe {
197 u8 dev_uuid[BTRFS_UUID_SIZE];
198 } __attribute__ ((__packed__));
201 /* size of this chunk in bytes */
204 /* objectid of the root referencing this chunk */
210 /* optimal io alignment for this chunk */
213 /* optimal io width for this chunk */
216 /* minimal io size for this chunk */
219 /* 2^16 stripes is quite a lot, a second limit is the size of a single
224 /* sub stripes only matter for raid10 */
226 struct btrfs_stripe stripe;
227 /* additional stripes go here */
228 } __attribute__ ((__packed__));
230 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
232 BUG_ON(num_stripes == 0);
233 return sizeof(struct btrfs_chunk) +
234 sizeof(struct btrfs_stripe) * (num_stripes - 1);
237 #define BTRFS_FSID_SIZE 16
238 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
241 * every tree block (leaf or node) starts with this header.
243 struct btrfs_header {
244 /* these first four must match the super block */
245 u8 csum[BTRFS_CSUM_SIZE];
246 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
247 __le64 bytenr; /* which block this node is supposed to live in */
250 /* allowed to be different from the super from here on down */
251 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
256 } __attribute__ ((__packed__));
258 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
259 sizeof(struct btrfs_header)) / \
260 sizeof(struct btrfs_key_ptr))
261 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
262 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
263 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
264 sizeof(struct btrfs_item) - \
265 sizeof(struct btrfs_file_extent_item))
269 * this is a very generous portion of the super block, giving us
270 * room to translate 14 chunks with 3 stripes each.
272 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
273 #define BTRFS_LABEL_SIZE 256
276 * the super block basically lists the main trees of the FS
277 * it currently lacks any block count etc etc
279 struct btrfs_super_block {
280 u8 csum[BTRFS_CSUM_SIZE];
281 /* the first 4 fields must match struct btrfs_header */
282 u8 fsid[16]; /* FS specific uuid */
283 __le64 bytenr; /* this block number */
286 /* allowed to be different from the btrfs_header from here own down */
294 __le64 root_dir_objectid;
300 __le32 sys_chunk_array_size;
304 struct btrfs_dev_item dev_item;
305 char label[BTRFS_LABEL_SIZE];
306 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
307 } __attribute__ ((__packed__));
310 * A leaf is full of items. offset and size tell us where to find
311 * the item in the leaf (relative to the start of the data area)
314 struct btrfs_disk_key key;
317 } __attribute__ ((__packed__));
320 * leaves have an item area and a data area:
321 * [item0, item1....itemN] [free space] [dataN...data1, data0]
323 * The data is separate from the items to get the keys closer together
327 struct btrfs_header header;
328 struct btrfs_item items[];
329 } __attribute__ ((__packed__));
332 * all non-leaf blocks are nodes, they hold only keys and pointers to
335 struct btrfs_key_ptr {
336 struct btrfs_disk_key key;
339 } __attribute__ ((__packed__));
342 struct btrfs_header header;
343 struct btrfs_key_ptr ptrs[];
344 } __attribute__ ((__packed__));
347 * btrfs_paths remember the path taken from the root down to the leaf.
348 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
349 * to any other levels that are present.
351 * The slots array records the index of the item or block pointer
352 * used while walking the tree.
355 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
356 int slots[BTRFS_MAX_LEVEL];
357 /* if there is real range locking, this locks field will change */
358 int locks[BTRFS_MAX_LEVEL];
360 /* keep some upper locks as we walk down */
367 * items in the extent btree are used to record the objectid of the
368 * owner of the block and the number of references
370 struct btrfs_extent_item {
372 } __attribute__ ((__packed__));
374 struct btrfs_extent_ref {
380 } __attribute__ ((__packed__));
382 /* dev extents record free space on individual devices. The owner
383 * field points back to the chunk allocation mapping tree that allocated
384 * the extent. The chunk tree uuid field is a way to double check the owner
386 struct btrfs_dev_extent {
388 __le64 chunk_objectid;
391 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
392 } __attribute__ ((__packed__));
394 struct btrfs_inode_ref {
398 } __attribute__ ((__packed__));
400 struct btrfs_timespec {
403 } __attribute__ ((__packed__));
406 * there is no padding here on purpose. If you want to extent the inode,
407 * make a new item type
409 struct btrfs_inode_item {
410 /* nfs style generation number */
412 /* transid that last touched this inode */
424 struct btrfs_timespec atime;
425 struct btrfs_timespec ctime;
426 struct btrfs_timespec mtime;
427 struct btrfs_timespec otime;
428 } __attribute__ ((__packed__));
430 struct btrfs_dir_log_item {
432 } __attribute__ ((__packed__));
434 struct btrfs_dir_item {
435 struct btrfs_disk_key location;
440 } __attribute__ ((__packed__));
442 struct btrfs_root_item {
443 struct btrfs_inode_item inode;
450 struct btrfs_disk_key drop_progress;
453 } __attribute__ ((__packed__));
455 #define BTRFS_FILE_EXTENT_REG 0
456 #define BTRFS_FILE_EXTENT_INLINE 1
458 struct btrfs_file_extent_item {
462 * disk space consumed by the extent, checksum blocks are included
466 __le64 disk_num_bytes;
468 * the logical offset in file blocks (no csums)
469 * this extent record is for. This allows a file extent to point
470 * into the middle of an existing extent on disk, sharing it
471 * between two snapshots (useful if some bytes in the middle of the
472 * extent have changed
476 * the logical number of file blocks (no csums included)
479 } __attribute__ ((__packed__));
481 struct btrfs_csum_item {
483 } __attribute__ ((__packed__));
485 /* different types of block groups (and chunks) */
486 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
487 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
488 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
489 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
490 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
491 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
492 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
494 struct btrfs_block_group_item {
496 __le64 chunk_objectid;
498 } __attribute__ ((__packed__));
500 struct btrfs_space_info {
508 struct list_head list;
510 /* for block groups in our same type */
511 struct list_head block_groups;
515 struct btrfs_free_space {
516 struct rb_node bytes_index;
517 struct rb_node offset_index;
522 struct btrfs_block_group_cache {
523 struct btrfs_key key;
524 struct btrfs_block_group_item item;
533 struct btrfs_space_info *space_info;
535 /* free space cache stuff */
536 struct rb_root free_space_bytes;
537 struct rb_root free_space_offset;
539 /* block group cache stuff */
540 struct rb_node cache_node;
542 /* for block groups in the same raid type */
543 struct list_head list;
546 struct btrfs_leaf_ref_tree {
548 struct list_head list;
553 struct btrfs_fs_devices;
554 struct btrfs_fs_info {
555 u8 fsid[BTRFS_FSID_SIZE];
556 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
557 struct btrfs_root *extent_root;
558 struct btrfs_root *tree_root;
559 struct btrfs_root *chunk_root;
560 struct btrfs_root *dev_root;
562 /* the log root tree is a directory of all the other log roots */
563 struct btrfs_root *log_root_tree;
564 struct radix_tree_root fs_roots_radix;
566 /* block group cache stuff */
567 spinlock_t block_group_cache_lock;
568 struct rb_root block_group_cache_tree;
570 struct extent_io_tree pinned_extents;
571 struct extent_io_tree pending_del;
572 struct extent_io_tree extent_ins;
574 /* logical->physical extent mapping */
575 struct btrfs_mapping_tree mapping_tree;
578 u64 last_trans_committed;
579 u64 last_trans_new_blockgroup;
580 u64 open_ioctl_trans;
581 unsigned long mount_opt;
585 struct btrfs_transaction *running_transaction;
586 wait_queue_head_t transaction_throttle;
587 wait_queue_head_t transaction_wait;
588 wait_queue_head_t async_submit_wait;
590 wait_queue_head_t tree_log_wait;
592 struct btrfs_super_block super_copy;
593 struct btrfs_super_block super_for_commit;
594 struct block_device *__bdev;
595 struct super_block *sb;
596 struct inode *btree_inode;
597 struct backing_dev_info bdi;
598 spinlock_t hash_lock;
599 struct mutex trans_mutex;
600 struct mutex tree_log_mutex;
601 struct mutex transaction_kthread_mutex;
602 struct mutex cleaner_mutex;
603 struct mutex alloc_mutex;
604 struct mutex chunk_mutex;
605 struct mutex drop_mutex;
606 struct mutex volume_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 nr_async_bios;
613 atomic_t tree_log_writers;
614 atomic_t tree_log_commit;
615 unsigned long tree_log_batch;
616 u64 tree_log_transid;
619 * this is used by the balancing code to wait for all the pending
622 spinlock_t ordered_extent_lock;
623 struct list_head ordered_extents;
624 struct list_head delalloc_inodes;
627 * there is a pool of worker threads for checksumming during writes
628 * and a pool for checksumming after reads. This is because readers
629 * can run with FS locks held, and the writers may be waiting for
630 * those locks. We don't want ordering in the pending list to cause
631 * deadlocks, and so the two are serviced separately.
633 * A third pool does submit_bio to avoid deadlocking with the other
636 struct btrfs_workers workers;
637 struct btrfs_workers endio_workers;
638 struct btrfs_workers endio_write_workers;
639 struct btrfs_workers submit_workers;
641 * fixup workers take dirty pages that didn't properly go through
642 * the cow mechanism and make them safe to write. It happens
643 * for the sys_munmap function call path
645 struct btrfs_workers fixup_workers;
646 struct task_struct *transaction_kthread;
647 struct task_struct *cleaner_kthread;
648 int thread_pool_size;
650 struct btrfs_leaf_ref_tree shared_ref_tree;
652 struct kobject super_kobj;
653 struct completion kobj_unregister;
656 int log_root_recovering;
658 atomic_t throttle_gen;
661 struct list_head dirty_cowonly_roots;
663 struct btrfs_fs_devices *fs_devices;
664 struct list_head space_info;
665 spinlock_t delalloc_lock;
666 spinlock_t new_trans_lock;
672 spinlock_t ref_cache_lock;
673 u64 total_ref_cache_size;
675 u64 avail_data_alloc_bits;
676 u64 avail_metadata_alloc_bits;
677 u64 avail_system_alloc_bits;
678 u64 data_alloc_profile;
679 u64 metadata_alloc_profile;
680 u64 system_alloc_profile;
686 * in ram representation of the tree. extent_root is used for all allocations
687 * and for the extent tree extent_root root.
689 struct btrfs_dirty_root;
691 struct extent_buffer *node;
693 /* the node lock is held while changing the node pointer */
694 spinlock_t node_lock;
696 struct extent_buffer *commit_root;
697 struct btrfs_leaf_ref_tree *ref_tree;
698 struct btrfs_leaf_ref_tree ref_tree_struct;
699 struct btrfs_dirty_root *dirty_root;
700 struct btrfs_root *log_root;
702 struct btrfs_root_item root_item;
703 struct btrfs_key root_key;
704 struct btrfs_fs_info *fs_info;
706 struct extent_io_tree dirty_log_pages;
708 struct kobject root_kobj;
709 struct completion kobj_unregister;
710 struct mutex objectid_mutex;
711 struct mutex log_mutex;
716 /* data allocations are done in sectorsize units */
719 /* node allocations are done in nodesize units */
722 /* leaf allocations are done in leafsize units */
729 u64 last_inode_alloc;
732 u64 defrag_trans_start;
733 struct btrfs_key defrag_progress;
734 struct btrfs_key defrag_max;
740 /* the dirty list is only used by non-reference counted roots */
741 struct list_head dirty_list;
743 spinlock_t list_lock;
744 struct list_head dead_list;
745 struct list_head orphan_list;
750 * inode items have the data typically returned from stat and store other
751 * info about object characteristics. There is one for every file and dir in
754 #define BTRFS_INODE_ITEM_KEY 1
755 #define BTRFS_INODE_REF_KEY 2
756 #define BTRFS_XATTR_ITEM_KEY 8
757 #define BTRFS_ORPHAN_ITEM_KEY 9
758 /* reserve 2-15 close to the inode for later flexibility */
761 * dir items are the name -> inode pointers in a directory. There is one
762 * for every name in a directory.
764 #define BTRFS_DIR_LOG_ITEM_KEY 14
765 #define BTRFS_DIR_LOG_INDEX_KEY 15
766 #define BTRFS_DIR_ITEM_KEY 16
767 #define BTRFS_DIR_INDEX_KEY 17
769 * extent data is for file data
771 #define BTRFS_EXTENT_DATA_KEY 18
773 * csum items have the checksums for data in the extents
775 #define BTRFS_CSUM_ITEM_KEY 19
778 /* reserve 21-31 for other file/dir stuff */
781 * root items point to tree roots. There are typically in the root
782 * tree used by the super block to find all the other trees
784 #define BTRFS_ROOT_ITEM_KEY 32
786 * extent items are in the extent map tree. These record which blocks
787 * are used, and how many references there are to each block
789 #define BTRFS_EXTENT_ITEM_KEY 33
790 #define BTRFS_EXTENT_REF_KEY 34
793 * block groups give us hints into the extent allocation trees. Which
794 * blocks are free etc etc
796 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
798 #define BTRFS_DEV_EXTENT_KEY 75
799 #define BTRFS_DEV_ITEM_KEY 76
800 #define BTRFS_CHUNK_ITEM_KEY 77
803 * string items are for debugging. They just store a short string of
806 #define BTRFS_STRING_ITEM_KEY 253
808 #define BTRFS_MOUNT_NODATASUM (1 << 0)
809 #define BTRFS_MOUNT_NODATACOW (1 << 1)
810 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
811 #define BTRFS_MOUNT_SSD (1 << 3)
812 #define BTRFS_MOUNT_DEGRADED (1 << 4)
814 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
815 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
816 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
821 #define BTRFS_INODE_NODATASUM (1 << 0)
822 #define BTRFS_INODE_NODATACOW (1 << 1)
823 #define BTRFS_INODE_READONLY (1 << 2)
824 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
826 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
828 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
830 /* some macros to generate set/get funcs for the struct fields. This
831 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
834 #define le8_to_cpu(v) (v)
835 #define cpu_to_le8(v) (v)
838 #define read_eb_member(eb, ptr, type, member, result) ( \
839 read_extent_buffer(eb, (char *)(result), \
840 ((unsigned long)(ptr)) + \
841 offsetof(type, member), \
842 sizeof(((type *)0)->member)))
844 #define write_eb_member(eb, ptr, type, member, result) ( \
845 write_extent_buffer(eb, (char *)(result), \
846 ((unsigned long)(ptr)) + \
847 offsetof(type, member), \
848 sizeof(((type *)0)->member)))
850 #ifndef BTRFS_SETGET_FUNCS
851 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
852 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
853 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
856 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
857 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
859 type *p = kmap_atomic(eb->first_page, KM_USER0); \
860 u##bits res = le##bits##_to_cpu(p->member); \
861 kunmap_atomic(p, KM_USER0); \
864 static inline void btrfs_set_##name(struct extent_buffer *eb, \
867 type *p = kmap_atomic(eb->first_page, KM_USER0); \
868 p->member = cpu_to_le##bits(val); \
869 kunmap_atomic(p, KM_USER0); \
872 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
873 static inline u##bits btrfs_##name(type *s) \
875 return le##bits##_to_cpu(s->member); \
877 static inline void btrfs_set_##name(type *s, u##bits val) \
879 s->member = cpu_to_le##bits(val); \
882 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
883 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
884 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
885 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
886 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
887 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
888 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
889 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
890 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
891 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
893 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
894 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
896 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
898 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
900 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
902 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
904 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
905 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
907 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
909 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
912 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
914 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
917 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
918 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
919 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
920 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
921 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
922 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
923 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
924 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
925 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
926 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
927 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
929 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
931 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
934 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
935 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
936 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
938 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
940 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
942 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
944 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
945 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
947 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
949 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
950 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
952 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
955 unsigned long offset = (unsigned long)c;
956 offset += offsetof(struct btrfs_chunk, stripe);
957 offset += nr * sizeof(struct btrfs_stripe);
958 return (struct btrfs_stripe *)offset;
961 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
963 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
966 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
967 struct btrfs_chunk *c, int nr)
969 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
972 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
973 struct btrfs_chunk *c, int nr,
976 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
979 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
980 struct btrfs_chunk *c, int nr)
982 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
985 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
986 struct btrfs_chunk *c, int nr,
989 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
992 /* struct btrfs_block_group_item */
993 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
995 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
997 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
998 struct btrfs_block_group_item, chunk_objectid, 64);
1000 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1001 struct btrfs_block_group_item, chunk_objectid, 64);
1002 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1003 struct btrfs_block_group_item, flags, 64);
1004 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1005 struct btrfs_block_group_item, flags, 64);
1007 /* struct btrfs_inode_ref */
1008 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1009 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1011 /* struct btrfs_inode_item */
1012 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1013 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1014 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1015 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
1016 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1017 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1018 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1019 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1020 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1021 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1022 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1023 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1026 static inline struct btrfs_timespec *
1027 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1029 unsigned long ptr = (unsigned long)inode_item;
1030 ptr += offsetof(struct btrfs_inode_item, atime);
1031 return (struct btrfs_timespec *)ptr;
1034 static inline struct btrfs_timespec *
1035 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1037 unsigned long ptr = (unsigned long)inode_item;
1038 ptr += offsetof(struct btrfs_inode_item, mtime);
1039 return (struct btrfs_timespec *)ptr;
1042 static inline struct btrfs_timespec *
1043 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1045 unsigned long ptr = (unsigned long)inode_item;
1046 ptr += offsetof(struct btrfs_inode_item, ctime);
1047 return (struct btrfs_timespec *)ptr;
1050 static inline struct btrfs_timespec *
1051 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1053 unsigned long ptr = (unsigned long)inode_item;
1054 ptr += offsetof(struct btrfs_inode_item, otime);
1055 return (struct btrfs_timespec *)ptr;
1058 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1059 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1061 /* struct btrfs_dev_extent */
1062 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1064 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1065 chunk_objectid, 64);
1066 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1068 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1070 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1072 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1073 return (u8 *)((unsigned long)dev + ptr);
1076 /* struct btrfs_extent_ref */
1077 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1078 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1079 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1080 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1081 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1083 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1084 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1086 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1088 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref,
1090 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1093 /* struct btrfs_extent_item */
1094 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1095 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1098 /* struct btrfs_node */
1099 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1100 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1102 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1105 ptr = offsetof(struct btrfs_node, ptrs) +
1106 sizeof(struct btrfs_key_ptr) * nr;
1107 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1110 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1114 ptr = offsetof(struct btrfs_node, ptrs) +
1115 sizeof(struct btrfs_key_ptr) * nr;
1116 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1119 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1122 ptr = offsetof(struct btrfs_node, ptrs) +
1123 sizeof(struct btrfs_key_ptr) * nr;
1124 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1127 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1131 ptr = offsetof(struct btrfs_node, ptrs) +
1132 sizeof(struct btrfs_key_ptr) * nr;
1133 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1136 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1138 return offsetof(struct btrfs_node, ptrs) +
1139 sizeof(struct btrfs_key_ptr) * nr;
1142 void btrfs_node_key(struct extent_buffer *eb,
1143 struct btrfs_disk_key *disk_key, int nr);
1145 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1146 struct btrfs_disk_key *disk_key, int nr)
1149 ptr = btrfs_node_key_ptr_offset(nr);
1150 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1151 struct btrfs_key_ptr, key, disk_key);
1154 /* struct btrfs_item */
1155 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1156 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1158 static inline unsigned long btrfs_item_nr_offset(int nr)
1160 return offsetof(struct btrfs_leaf, items) +
1161 sizeof(struct btrfs_item) * nr;
1164 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1167 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1170 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1171 struct btrfs_item *item)
1173 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1176 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1178 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1181 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1183 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1186 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1188 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1191 static inline void btrfs_item_key(struct extent_buffer *eb,
1192 struct btrfs_disk_key *disk_key, int nr)
1194 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1195 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1198 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1199 struct btrfs_disk_key *disk_key, int nr)
1201 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1202 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1205 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1207 /* struct btrfs_dir_item */
1208 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1209 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1210 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1211 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1213 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1214 struct btrfs_dir_item *item,
1215 struct btrfs_disk_key *key)
1217 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1220 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1221 struct btrfs_dir_item *item,
1222 struct btrfs_disk_key *key)
1224 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1227 /* struct btrfs_disk_key */
1228 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1230 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1231 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1233 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1234 struct btrfs_disk_key *disk)
1236 cpu->offset = le64_to_cpu(disk->offset);
1237 cpu->type = disk->type;
1238 cpu->objectid = le64_to_cpu(disk->objectid);
1241 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1242 struct btrfs_key *cpu)
1244 disk->offset = cpu_to_le64(cpu->offset);
1245 disk->type = cpu->type;
1246 disk->objectid = cpu_to_le64(cpu->objectid);
1249 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1250 struct btrfs_key *key, int nr)
1252 struct btrfs_disk_key disk_key;
1253 btrfs_node_key(eb, &disk_key, nr);
1254 btrfs_disk_key_to_cpu(key, &disk_key);
1257 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1258 struct btrfs_key *key, int nr)
1260 struct btrfs_disk_key disk_key;
1261 btrfs_item_key(eb, &disk_key, nr);
1262 btrfs_disk_key_to_cpu(key, &disk_key);
1265 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1266 struct btrfs_dir_item *item,
1267 struct btrfs_key *key)
1269 struct btrfs_disk_key disk_key;
1270 btrfs_dir_item_key(eb, item, &disk_key);
1271 btrfs_disk_key_to_cpu(key, &disk_key);
1275 static inline u8 btrfs_key_type(struct btrfs_key *key)
1280 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1285 /* struct btrfs_header */
1286 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1287 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1289 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1290 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1291 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1292 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1294 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1296 return (btrfs_header_flags(eb) & flag) == flag;
1299 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1301 u64 flags = btrfs_header_flags(eb);
1302 btrfs_set_header_flags(eb, flags | flag);
1303 return (flags & flag) == flag;
1306 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1308 u64 flags = btrfs_header_flags(eb);
1309 btrfs_set_header_flags(eb, flags & ~flag);
1310 return (flags & flag) == flag;
1313 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1315 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1319 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1321 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1325 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1327 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1331 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1333 unsigned long ptr = offsetof(struct btrfs_header, csum);
1337 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1342 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1347 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1352 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1354 return (btrfs_header_level(eb) == 0);
1357 /* struct btrfs_root_item */
1358 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1359 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1360 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1362 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1363 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1364 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1365 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1366 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1367 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1368 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1370 /* struct btrfs_super_block */
1371 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1372 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1373 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1375 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1376 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1377 struct btrfs_super_block, sys_chunk_array_size, 32);
1378 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1380 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1382 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1383 chunk_root_level, 8);
1384 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1386 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1388 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1390 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1392 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1394 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1396 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1398 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1400 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1401 root_dir_objectid, 64);
1402 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1405 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1407 return offsetof(struct btrfs_leaf, items);
1410 /* struct btrfs_file_extent_item */
1411 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1413 static inline unsigned long btrfs_file_extent_inline_start(struct
1414 btrfs_file_extent_item *e)
1416 unsigned long offset = (unsigned long)e;
1417 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1421 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1423 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1426 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1427 struct btrfs_item *e)
1429 unsigned long offset;
1430 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1431 return btrfs_item_size(eb, e) - offset;
1434 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1436 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1438 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1439 disk_num_bytes, 64);
1440 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1442 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1445 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1447 return sb->s_fs_info;
1450 static inline int btrfs_set_root_name(struct btrfs_root *root,
1451 const char *name, int len)
1453 /* if we already have a name just free it */
1457 root->name = kmalloc(len+1, GFP_KERNEL);
1461 memcpy(root->name, name, len);
1462 root->name[len] ='\0';
1467 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1469 return root->leafsize;
1470 return root->nodesize;
1473 /* helper function to cast into the data area of the leaf. */
1474 #define btrfs_item_ptr(leaf, slot, type) \
1475 ((type *)(btrfs_leaf_data(leaf) + \
1476 btrfs_item_offset_nr(leaf, slot)))
1478 #define btrfs_item_ptr_offset(leaf, slot) \
1479 ((unsigned long)(btrfs_leaf_data(leaf) + \
1480 btrfs_item_offset_nr(leaf, slot)))
1482 static inline struct dentry *fdentry(struct file *file)
1484 return file->f_path.dentry;
1488 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1489 int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
1490 struct btrfs_root *root, u64 bytenr,
1491 u64 num_bytes, u32 *refs);
1492 int btrfs_update_pinned_extents(struct btrfs_root *root,
1493 u64 bytenr, u64 num, int pin);
1494 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1495 struct btrfs_root *root, struct extent_buffer *leaf);
1496 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root,
1498 struct btrfs_key *key, u64 bytenr);
1499 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1500 struct btrfs_root *root);
1501 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1502 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1503 btrfs_fs_info *info,
1505 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1506 struct btrfs_block_group_cache
1507 *hint, u64 search_start,
1508 int data, int owner);
1509 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root,
1511 u32 blocksize, u64 parent,
1517 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1518 struct btrfs_root *root,
1519 u64 bytenr, u32 blocksize);
1520 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1521 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root,
1523 struct btrfs_path *path,
1524 u64 bytenr, u64 parent,
1525 u64 root_objectid, u64 ref_generation,
1526 u64 owner, u64 owner_offset);
1527 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1528 struct btrfs_root *root,
1529 u64 num_bytes, u64 parent, u64 min_bytes,
1530 u64 root_objectid, u64 ref_generation,
1531 u64 owner, u64 owner_offset,
1532 u64 empty_size, u64 hint_byte,
1533 u64 search_end, struct btrfs_key *ins, u64 data);
1534 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1535 struct btrfs_root *root, u64 parent,
1536 u64 root_objectid, u64 ref_generation,
1537 u64 owner, u64 owner_offset,
1538 struct btrfs_key *ins);
1539 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1540 struct btrfs_root *root, u64 parent,
1541 u64 root_objectid, u64 ref_generation,
1542 u64 owner, u64 owner_offset,
1543 struct btrfs_key *ins);
1544 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1545 struct btrfs_root *root,
1546 u64 num_bytes, u64 min_alloc_size,
1547 u64 empty_size, u64 hint_byte,
1548 u64 search_end, struct btrfs_key *ins,
1550 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1551 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1553 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1554 struct extent_buffer *buf, u32 nr_extents);
1555 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1556 struct btrfs_root *root, struct extent_buffer *orig_buf,
1557 struct extent_buffer *buf, int start_slot, int nr);
1558 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1559 struct btrfs_root *root,
1560 u64 bytenr, u64 num_bytes, u64 parent,
1561 u64 root_objectid, u64 ref_generation,
1562 u64 owner_objectid, u64 owner_offset, int pin);
1563 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1564 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *root,
1566 struct extent_io_tree *unpin);
1567 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1568 struct btrfs_root *root,
1569 u64 bytenr, u64 num_bytes, u64 parent,
1570 u64 root_objectid, u64 ref_generation,
1571 u64 owner, u64 owner_offset);
1572 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1573 struct btrfs_root *root, u64 bytenr,
1574 u64 orig_parent, u64 parent,
1575 u64 root_objectid, u64 ref_generation,
1576 u64 owner, u64 owner_offset);
1577 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1578 struct btrfs_root *root);
1579 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1580 int btrfs_read_block_groups(struct btrfs_root *root);
1581 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1582 struct btrfs_root *root, u64 bytes_used,
1583 u64 type, u64 chunk_objectid, u64 chunk_offset,
1586 int btrfs_previous_item(struct btrfs_root *root,
1587 struct btrfs_path *path, u64 min_objectid,
1589 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root, struct btrfs_path *path,
1591 struct btrfs_key *new_key);
1592 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1593 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1594 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1595 struct btrfs_key *key, int lowest_level,
1596 int cache_only, u64 min_trans);
1597 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1598 struct btrfs_key *max_key,
1599 struct btrfs_path *path, int cache_only,
1601 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1602 struct btrfs_root *root, struct extent_buffer *buf,
1603 struct extent_buffer *parent, int parent_slot,
1604 struct extent_buffer **cow_ret, u64 prealloc_dest);
1605 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1606 struct btrfs_root *root,
1607 struct extent_buffer *buf,
1608 struct extent_buffer **cow_ret, u64 new_root_objectid);
1609 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1610 *root, struct btrfs_path *path, u32 data_size);
1611 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *root,
1613 struct btrfs_path *path,
1614 u32 new_size, int from_end);
1615 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1616 *root, struct btrfs_key *key, struct btrfs_path *p, int
1618 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1619 struct btrfs_root *root, struct extent_buffer *parent,
1620 int start_slot, int cache_only, u64 *last_ret,
1621 struct btrfs_key *progress);
1622 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1623 struct btrfs_path *btrfs_alloc_path(void);
1624 void btrfs_free_path(struct btrfs_path *p);
1625 void btrfs_init_path(struct btrfs_path *p);
1626 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1627 struct btrfs_path *path, int slot, int nr);
1629 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root,
1631 struct btrfs_path *path)
1633 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1636 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1637 *root, struct btrfs_key *key, void *data, u32 data_size);
1638 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1639 struct btrfs_root *root,
1640 struct btrfs_path *path,
1641 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1643 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1644 struct btrfs_root *root,
1645 struct btrfs_path *path,
1646 struct btrfs_key *key,
1649 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1652 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1653 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1654 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1655 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1658 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1659 struct btrfs_key *key);
1660 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1661 *root, struct btrfs_key *key, struct btrfs_root_item
1663 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1664 *root, struct btrfs_key *key, struct btrfs_root_item
1666 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1667 btrfs_root_item *item, struct btrfs_key *key);
1668 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1669 u64 *found_objectid);
1670 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1671 struct btrfs_root *latest_root);
1673 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1674 *root, const char *name, int name_len, u64 dir,
1675 struct btrfs_key *location, u8 type, u64 index);
1676 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1677 struct btrfs_root *root,
1678 struct btrfs_path *path, u64 dir,
1679 const char *name, int name_len,
1681 struct btrfs_dir_item *
1682 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1683 struct btrfs_root *root,
1684 struct btrfs_path *path, u64 dir,
1685 u64 objectid, const char *name, int name_len,
1687 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1688 struct btrfs_path *path,
1689 const char *name, int name_len);
1690 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1691 struct btrfs_root *root,
1692 struct btrfs_path *path,
1693 struct btrfs_dir_item *di);
1694 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1695 struct btrfs_root *root, const char *name,
1696 u16 name_len, const void *data, u16 data_len,
1698 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root,
1700 struct btrfs_path *path, u64 dir,
1701 const char *name, u16 name_len,
1705 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1706 struct btrfs_root *root, u64 offset);
1707 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1708 struct btrfs_root *root, u64 offset);
1711 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1712 struct btrfs_root *fs_root,
1713 u64 dirid, u64 *objectid);
1714 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1717 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1718 struct btrfs_root *root,
1719 const char *name, int name_len,
1720 u64 inode_objectid, u64 ref_objectid, u64 index);
1721 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1722 struct btrfs_root *root,
1723 const char *name, int name_len,
1724 u64 inode_objectid, u64 ref_objectid, u64 *index);
1725 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1726 struct btrfs_root *root,
1727 struct btrfs_path *path, u64 objectid);
1728 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1729 *root, struct btrfs_path *path,
1730 struct btrfs_key *location, int mod);
1733 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1735 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1736 struct btrfs_root *root,
1737 u64 objectid, u64 pos, u64 disk_offset,
1739 u64 num_bytes, u64 offset);
1740 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1741 struct btrfs_root *root,
1742 struct btrfs_path *path, u64 objectid,
1743 u64 bytenr, int mod);
1744 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1745 struct btrfs_root *root, struct inode *inode,
1746 struct btrfs_ordered_sum *sums);
1747 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1749 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1750 struct btrfs_root *root,
1751 struct btrfs_path *path,
1752 u64 objectid, u64 offset,
1754 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1755 struct btrfs_root *root, struct btrfs_path *path,
1759 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1760 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1761 #define ClearPageChecked ClearPageFsMisc
1762 #define SetPageChecked SetPageFsMisc
1763 #define PageChecked PageFsMisc
1766 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root,
1768 struct inode *dir, struct inode *inode,
1769 const char *name, int name_len);
1770 int btrfs_add_link(struct btrfs_trans_handle *trans,
1771 struct inode *parent_inode, struct inode *inode,
1772 const char *name, int name_len, int add_backref, u64 index);
1773 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1774 struct btrfs_root *root,
1775 struct inode *inode, u64 new_size,
1778 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1779 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1780 int btrfs_writepages(struct address_space *mapping,
1781 struct writeback_control *wbc);
1782 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1783 struct btrfs_trans_handle *trans, u64 new_dirid,
1784 struct btrfs_block_group_cache *block_group);
1786 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1789 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1790 size_t size, struct bio *bio);
1792 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1795 if (dec <= inode->i_blocks)
1796 inode->i_blocks -= dec;
1798 inode->i_blocks = 0;
1801 unsigned long btrfs_force_ra(struct address_space *mapping,
1802 struct file_ra_state *ra, struct file *file,
1803 pgoff_t offset, pgoff_t last_index);
1804 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1806 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1807 int btrfs_readpage(struct file *file, struct page *page);
1808 void btrfs_delete_inode(struct inode *inode);
1809 void btrfs_put_inode(struct inode *inode);
1810 void btrfs_read_locked_inode(struct inode *inode);
1811 int btrfs_write_inode(struct inode *inode, int wait);
1812 void btrfs_dirty_inode(struct inode *inode);
1813 struct inode *btrfs_alloc_inode(struct super_block *sb);
1814 void btrfs_destroy_inode(struct inode *inode);
1815 int btrfs_init_cachep(void);
1816 void btrfs_destroy_cachep(void);
1817 long btrfs_ioctl_trans_end(struct file *file);
1818 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1819 struct btrfs_root *root, int wait);
1820 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1821 struct btrfs_root *root);
1822 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1823 struct btrfs_root *root, int *is_new);
1824 int btrfs_commit_write(struct file *file, struct page *page,
1825 unsigned from, unsigned to);
1826 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1827 size_t page_offset, u64 start, u64 end,
1829 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1830 struct btrfs_root *root,
1831 struct inode *inode);
1832 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode);
1833 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
1834 void btrfs_orphan_cleanup(struct btrfs_root *root);
1837 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1840 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1841 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
1843 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1844 extern struct file_operations btrfs_file_operations;
1845 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1846 struct btrfs_root *root, struct inode *inode,
1847 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1848 int btrfs_release_file(struct inode *inode, struct file *file);
1851 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1852 struct btrfs_root *root, int cache_only);
1855 int btrfs_init_sysfs(void);
1856 void btrfs_exit_sysfs(void);
1857 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1858 int btrfs_sysfs_add_root(struct btrfs_root *root);
1859 void btrfs_sysfs_del_root(struct btrfs_root *root);
1860 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1863 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1866 u64 btrfs_parse_size(char *str);
1867 int btrfs_parse_options(struct btrfs_root *root, char *options);
1868 int btrfs_sync_fs(struct super_block *sb, int wait);
1871 int btrfs_check_acl(struct inode *inode, int mask);
1872 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1873 int btrfs_acl_chmod(struct inode *inode);
1875 /* free-space-cache.c */
1876 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1877 u64 bytenr, u64 size);
1878 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1879 u64 bytenr, u64 size);
1880 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1882 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1883 *block_group, u64 offset,
1885 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1887 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);