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 "_B8RfS_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
85 * All files have objectids in this range.
87 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
88 #define BTRFS_LAST_FREE_OBJECTID -256ULL
89 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
93 * the device items go into the chunk tree. The key is in the form
94 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
96 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
99 * we can actually store much bigger names, but lets not confuse the rest
102 #define BTRFS_NAME_LEN 255
104 /* 32 bytes in various csum fields */
105 #define BTRFS_CSUM_SIZE 32
106 /* four bytes for CRC32 */
107 #define BTRFS_CRC32_SIZE 4
108 #define BTRFS_EMPTY_DIR_SIZE 0
110 #define BTRFS_FT_UNKNOWN 0
111 #define BTRFS_FT_REG_FILE 1
112 #define BTRFS_FT_DIR 2
113 #define BTRFS_FT_CHRDEV 3
114 #define BTRFS_FT_BLKDEV 4
115 #define BTRFS_FT_FIFO 5
116 #define BTRFS_FT_SOCK 6
117 #define BTRFS_FT_SYMLINK 7
118 #define BTRFS_FT_XATTR 8
119 #define BTRFS_FT_MAX 9
122 * the key defines the order in the tree, and so it also defines (optimal)
123 * block layout. objectid corresonds to the inode number. The flags
124 * tells us things about the object, and is a kind of stream selector.
125 * so for a given inode, keys with flags of 1 might refer to the inode
126 * data, flags of 2 may point to file data in the btree and flags == 3
127 * may point to extents.
129 * offset is the starting byte offset for this key in the stream.
131 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
132 * in cpu native order. Otherwise they are identical and their sizes
133 * should be the same (ie both packed)
135 struct btrfs_disk_key {
139 } __attribute__ ((__packed__));
145 } __attribute__ ((__packed__));
147 struct btrfs_mapping_tree {
148 struct extent_map_tree map_tree;
151 #define BTRFS_UUID_SIZE 16
152 struct btrfs_dev_item {
153 /* the internal btrfs device id */
156 /* size of the device */
162 /* optimal io alignment for this device */
165 /* optimal io width for this device */
168 /* minimal io size for this device */
171 /* type and info about this device */
174 /* grouping information for allocation decisions */
177 /* seek speed 0-100 where 100 is fastest */
180 /* bandwidth 0-100 where 100 is fastest */
183 /* btrfs generated uuid for this device */
184 u8 uuid[BTRFS_UUID_SIZE];
185 } __attribute__ ((__packed__));
187 struct btrfs_stripe {
190 u8 dev_uuid[BTRFS_UUID_SIZE];
191 } __attribute__ ((__packed__));
194 /* size of this chunk in bytes */
197 /* objectid of the root referencing this chunk */
203 /* optimal io alignment for this chunk */
206 /* optimal io width for this chunk */
209 /* minimal io size for this chunk */
212 /* 2^16 stripes is quite a lot, a second limit is the size of a single
217 /* sub stripes only matter for raid10 */
219 struct btrfs_stripe stripe;
220 /* additional stripes go here */
221 } __attribute__ ((__packed__));
223 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
225 BUG_ON(num_stripes == 0);
226 return sizeof(struct btrfs_chunk) +
227 sizeof(struct btrfs_stripe) * (num_stripes - 1);
230 #define BTRFS_FSID_SIZE 16
231 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
234 * every tree block (leaf or node) starts with this header.
236 struct btrfs_header {
237 /* these first four must match the super block */
238 u8 csum[BTRFS_CSUM_SIZE];
239 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
240 __le64 bytenr; /* which block this node is supposed to live in */
243 /* allowed to be different from the super from here on down */
244 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
249 } __attribute__ ((__packed__));
251 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
252 sizeof(struct btrfs_header)) / \
253 sizeof(struct btrfs_key_ptr))
254 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
255 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
256 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
257 sizeof(struct btrfs_item) - \
258 sizeof(struct btrfs_file_extent_item))
262 * this is a very generous portion of the super block, giving us
263 * room to translate 14 chunks with 3 stripes each.
265 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
266 #define BTRFS_LABEL_SIZE 256
269 * the super block basically lists the main trees of the FS
270 * it currently lacks any block count etc etc
272 struct btrfs_super_block {
273 u8 csum[BTRFS_CSUM_SIZE];
274 /* the first 4 fields must match struct btrfs_header */
275 u8 fsid[16]; /* FS specific uuid */
276 __le64 bytenr; /* this block number */
279 /* allowed to be different from the btrfs_header from here own down */
287 __le64 root_dir_objectid;
293 __le32 sys_chunk_array_size;
297 struct btrfs_dev_item dev_item;
298 char label[BTRFS_LABEL_SIZE];
299 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
300 } __attribute__ ((__packed__));
303 * A leaf is full of items. offset and size tell us where to find
304 * the item in the leaf (relative to the start of the data area)
307 struct btrfs_disk_key key;
310 } __attribute__ ((__packed__));
313 * leaves have an item area and a data area:
314 * [item0, item1....itemN] [free space] [dataN...data1, data0]
316 * The data is separate from the items to get the keys closer together
320 struct btrfs_header header;
321 struct btrfs_item items[];
322 } __attribute__ ((__packed__));
325 * all non-leaf blocks are nodes, they hold only keys and pointers to
328 struct btrfs_key_ptr {
329 struct btrfs_disk_key key;
332 } __attribute__ ((__packed__));
335 struct btrfs_header header;
336 struct btrfs_key_ptr ptrs[];
337 } __attribute__ ((__packed__));
340 * btrfs_paths remember the path taken from the root down to the leaf.
341 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
342 * to any other levels that are present.
344 * The slots array records the index of the item or block pointer
345 * used while walking the tree.
348 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
349 int slots[BTRFS_MAX_LEVEL];
350 /* if there is real range locking, this locks field will change */
351 int locks[BTRFS_MAX_LEVEL];
353 /* keep some upper locks as we walk down */
360 * items in the extent btree are used to record the objectid of the
361 * owner of the block and the number of references
363 struct btrfs_extent_item {
365 } __attribute__ ((__packed__));
367 struct btrfs_extent_ref {
372 } __attribute__ ((__packed__));
374 /* dev extents record free space on individual devices. The owner
375 * field points back to the chunk allocation mapping tree that allocated
376 * the extent. The chunk tree uuid field is a way to double check the owner
378 struct btrfs_dev_extent {
380 __le64 chunk_objectid;
383 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
384 } __attribute__ ((__packed__));
386 struct btrfs_inode_ref {
390 } __attribute__ ((__packed__));
392 struct btrfs_timespec {
395 } __attribute__ ((__packed__));
398 * there is no padding here on purpose. If you want to extent the inode,
399 * make a new item type
401 struct btrfs_inode_item {
402 /* nfs style generation number */
404 /* transid that last touched this inode */
416 struct btrfs_timespec atime;
417 struct btrfs_timespec ctime;
418 struct btrfs_timespec mtime;
419 struct btrfs_timespec otime;
420 } __attribute__ ((__packed__));
422 struct btrfs_dir_log_item {
424 } __attribute__ ((__packed__));
426 struct btrfs_dir_item {
427 struct btrfs_disk_key location;
432 } __attribute__ ((__packed__));
434 struct btrfs_root_item {
435 struct btrfs_inode_item inode;
442 struct btrfs_disk_key drop_progress;
445 } __attribute__ ((__packed__));
447 #define BTRFS_FILE_EXTENT_REG 0
448 #define BTRFS_FILE_EXTENT_INLINE 1
450 struct btrfs_file_extent_item {
454 * disk space consumed by the extent, checksum blocks are included
458 __le64 disk_num_bytes;
460 * the logical offset in file blocks (no csums)
461 * this extent record is for. This allows a file extent to point
462 * into the middle of an existing extent on disk, sharing it
463 * between two snapshots (useful if some bytes in the middle of the
464 * extent have changed
468 * the logical number of file blocks (no csums included)
471 } __attribute__ ((__packed__));
473 struct btrfs_csum_item {
475 } __attribute__ ((__packed__));
477 /* different types of block groups (and chunks) */
478 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
479 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
480 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
481 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
482 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
483 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
484 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
486 struct btrfs_block_group_item {
488 __le64 chunk_objectid;
490 } __attribute__ ((__packed__));
492 struct btrfs_space_info {
499 struct list_head list;
501 /* for block groups in our same type */
502 struct list_head block_groups;
506 struct btrfs_free_space {
507 struct rb_node bytes_index;
508 struct rb_node offset_index;
513 struct btrfs_block_group_cache {
514 struct btrfs_key key;
515 struct btrfs_block_group_item item;
523 struct btrfs_space_info *space_info;
525 /* free space cache stuff */
526 struct rb_root free_space_bytes;
527 struct rb_root free_space_offset;
529 /* block group cache stuff */
530 struct rb_node cache_node;
532 /* for block groups in the same raid type */
533 struct list_head list;
537 struct btrfs_fs_devices;
538 struct btrfs_fs_info {
539 u8 fsid[BTRFS_FSID_SIZE];
540 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
541 struct btrfs_root *extent_root;
542 struct btrfs_root *tree_root;
543 struct btrfs_root *chunk_root;
544 struct btrfs_root *dev_root;
546 /* the log root tree is a directory of all the other log roots */
547 struct btrfs_root *log_root_tree;
548 struct radix_tree_root fs_roots_radix;
550 /* block group cache stuff */
551 spinlock_t block_group_cache_lock;
552 struct rb_root block_group_cache_tree;
554 struct extent_io_tree pinned_extents;
555 struct extent_io_tree pending_del;
556 struct extent_io_tree extent_ins;
558 /* logical->physical extent mapping */
559 struct btrfs_mapping_tree mapping_tree;
562 u64 last_trans_committed;
563 u64 last_trans_new_blockgroup;
564 u64 open_ioctl_trans;
565 unsigned long mount_opt;
569 struct btrfs_transaction *running_transaction;
570 wait_queue_head_t transaction_throttle;
571 wait_queue_head_t transaction_wait;
572 wait_queue_head_t async_submit_wait;
574 wait_queue_head_t tree_log_wait;
576 struct btrfs_super_block super_copy;
577 struct btrfs_super_block super_for_commit;
578 struct block_device *__bdev;
579 struct super_block *sb;
580 struct inode *btree_inode;
581 struct backing_dev_info bdi;
582 spinlock_t hash_lock;
583 struct mutex trans_mutex;
584 struct mutex tree_log_mutex;
585 struct mutex transaction_kthread_mutex;
586 struct mutex cleaner_mutex;
587 struct mutex alloc_mutex;
588 struct mutex chunk_mutex;
589 struct mutex drop_mutex;
590 struct mutex volume_mutex;
591 struct list_head trans_list;
592 struct list_head hashers;
593 struct list_head dead_roots;
595 atomic_t nr_async_submits;
596 atomic_t nr_async_bios;
597 atomic_t tree_log_writers;
598 atomic_t tree_log_commit;
599 unsigned long tree_log_batch;
600 u64 tree_log_transid;
603 * this is used by the balancing code to wait for all the pending
606 spinlock_t ordered_extent_lock;
607 struct list_head ordered_extents;
608 struct list_head delalloc_inodes;
611 * there is a pool of worker threads for checksumming during writes
612 * and a pool for checksumming after reads. This is because readers
613 * can run with FS locks held, and the writers may be waiting for
614 * those locks. We don't want ordering in the pending list to cause
615 * deadlocks, and so the two are serviced separately.
617 * A third pool does submit_bio to avoid deadlocking with the other
620 struct btrfs_workers workers;
621 struct btrfs_workers endio_workers;
622 struct btrfs_workers endio_write_workers;
623 struct btrfs_workers submit_workers;
625 * fixup workers take dirty pages that didn't properly go through
626 * the cow mechanism and make them safe to write. It happens
627 * for the sys_munmap function call path
629 struct btrfs_workers fixup_workers;
630 struct task_struct *transaction_kthread;
631 struct task_struct *cleaner_kthread;
632 int thread_pool_size;
634 struct kobject super_kobj;
635 struct completion kobj_unregister;
638 int log_root_recovering;
640 atomic_t throttle_gen;
643 struct list_head dirty_cowonly_roots;
645 struct btrfs_fs_devices *fs_devices;
646 struct list_head space_info;
647 spinlock_t delalloc_lock;
648 spinlock_t new_trans_lock;
654 spinlock_t ref_cache_lock;
655 u64 total_ref_cache_size;
657 u64 avail_data_alloc_bits;
658 u64 avail_metadata_alloc_bits;
659 u64 avail_system_alloc_bits;
660 u64 data_alloc_profile;
661 u64 metadata_alloc_profile;
662 u64 system_alloc_profile;
667 struct btrfs_leaf_ref_tree {
669 struct btrfs_leaf_ref *last;
670 struct list_head list;
675 * in ram representation of the tree. extent_root is used for all allocations
676 * and for the extent tree extent_root root.
678 struct btrfs_dirty_root;
680 struct extent_buffer *node;
682 /* the node lock is held while changing the node pointer */
683 spinlock_t node_lock;
685 struct extent_buffer *commit_root;
686 struct btrfs_leaf_ref_tree *ref_tree;
687 struct btrfs_leaf_ref_tree ref_tree_struct;
688 struct btrfs_dirty_root *dirty_root;
689 struct btrfs_root *log_root;
691 struct btrfs_root_item root_item;
692 struct btrfs_key root_key;
693 struct btrfs_fs_info *fs_info;
695 struct extent_io_tree dirty_log_pages;
697 struct kobject root_kobj;
698 struct completion kobj_unregister;
699 struct mutex objectid_mutex;
700 struct mutex log_mutex;
705 /* data allocations are done in sectorsize units */
708 /* node allocations are done in nodesize units */
711 /* leaf allocations are done in leafsize units */
718 u64 last_inode_alloc;
721 u64 defrag_trans_start;
722 struct btrfs_key defrag_progress;
723 struct btrfs_key defrag_max;
729 /* the dirty list is only used by non-reference counted roots */
730 struct list_head dirty_list;
732 spinlock_t list_lock;
733 struct list_head dead_list;
734 struct list_head orphan_list;
739 * inode items have the data typically returned from stat and store other
740 * info about object characteristics. There is one for every file and dir in
743 #define BTRFS_INODE_ITEM_KEY 1
744 #define BTRFS_INODE_REF_KEY 2
745 #define BTRFS_XATTR_ITEM_KEY 8
746 #define BTRFS_ORPHAN_ITEM_KEY 9
747 /* reserve 2-15 close to the inode for later flexibility */
750 * dir items are the name -> inode pointers in a directory. There is one
751 * for every name in a directory.
753 #define BTRFS_DIR_LOG_ITEM_KEY 14
754 #define BTRFS_DIR_LOG_INDEX_KEY 15
755 #define BTRFS_DIR_ITEM_KEY 16
756 #define BTRFS_DIR_INDEX_KEY 17
758 * extent data is for file data
760 #define BTRFS_EXTENT_DATA_KEY 18
762 * csum items have the checksums for data in the extents
764 #define BTRFS_CSUM_ITEM_KEY 19
767 /* reserve 21-31 for other file/dir stuff */
770 * root items point to tree roots. There are typically in the root
771 * tree used by the super block to find all the other trees
773 #define BTRFS_ROOT_ITEM_KEY 32
775 * extent items are in the extent map tree. These record which blocks
776 * are used, and how many references there are to each block
778 #define BTRFS_EXTENT_ITEM_KEY 33
779 #define BTRFS_EXTENT_REF_KEY 34
782 * block groups give us hints into the extent allocation trees. Which
783 * blocks are free etc etc
785 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
787 #define BTRFS_DEV_EXTENT_KEY 75
788 #define BTRFS_DEV_ITEM_KEY 76
789 #define BTRFS_CHUNK_ITEM_KEY 77
792 * string items are for debugging. They just store a short string of
795 #define BTRFS_STRING_ITEM_KEY 253
797 #define BTRFS_MOUNT_NODATASUM (1 << 0)
798 #define BTRFS_MOUNT_NODATACOW (1 << 1)
799 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
800 #define BTRFS_MOUNT_SSD (1 << 3)
801 #define BTRFS_MOUNT_DEGRADED (1 << 4)
803 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
804 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
805 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
810 #define BTRFS_INODE_NODATASUM (1 << 0)
811 #define BTRFS_INODE_NODATACOW (1 << 1)
812 #define BTRFS_INODE_READONLY (1 << 2)
813 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
815 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
817 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
819 /* some macros to generate set/get funcs for the struct fields. This
820 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
823 #define le8_to_cpu(v) (v)
824 #define cpu_to_le8(v) (v)
827 #define read_eb_member(eb, ptr, type, member, result) ( \
828 read_extent_buffer(eb, (char *)(result), \
829 ((unsigned long)(ptr)) + \
830 offsetof(type, member), \
831 sizeof(((type *)0)->member)))
833 #define write_eb_member(eb, ptr, type, member, result) ( \
834 write_extent_buffer(eb, (char *)(result), \
835 ((unsigned long)(ptr)) + \
836 offsetof(type, member), \
837 sizeof(((type *)0)->member)))
839 #ifndef BTRFS_SETGET_FUNCS
840 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
841 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
842 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
845 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
846 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
848 type *p = kmap_atomic(eb->first_page, KM_USER0); \
849 u##bits res = le##bits##_to_cpu(p->member); \
850 kunmap_atomic(p, KM_USER0); \
853 static inline void btrfs_set_##name(struct extent_buffer *eb, \
856 type *p = kmap_atomic(eb->first_page, KM_USER0); \
857 p->member = cpu_to_le##bits(val); \
858 kunmap_atomic(p, KM_USER0); \
861 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
862 static inline u##bits btrfs_##name(type *s) \
864 return le##bits##_to_cpu(s->member); \
866 static inline void btrfs_set_##name(type *s, u##bits val) \
868 s->member = cpu_to_le##bits(val); \
871 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
872 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
873 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
874 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
875 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
876 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
877 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
878 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
879 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
880 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
882 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
883 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
885 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
887 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
889 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
891 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
893 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
894 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
896 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
898 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
901 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
903 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
906 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
907 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
908 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
909 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
910 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
911 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
912 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
913 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
914 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
915 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
916 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
918 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
920 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
923 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
924 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
925 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
927 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
929 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
931 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
933 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
934 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
936 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
938 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
939 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
941 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
944 unsigned long offset = (unsigned long)c;
945 offset += offsetof(struct btrfs_chunk, stripe);
946 offset += nr * sizeof(struct btrfs_stripe);
947 return (struct btrfs_stripe *)offset;
950 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
952 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
955 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
956 struct btrfs_chunk *c, int nr)
958 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
961 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
962 struct btrfs_chunk *c, int nr,
965 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
968 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
969 struct btrfs_chunk *c, int nr)
971 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
974 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
975 struct btrfs_chunk *c, int nr,
978 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
981 /* struct btrfs_block_group_item */
982 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
984 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
986 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
987 struct btrfs_block_group_item, chunk_objectid, 64);
989 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
990 struct btrfs_block_group_item, chunk_objectid, 64);
991 BTRFS_SETGET_FUNCS(disk_block_group_flags,
992 struct btrfs_block_group_item, flags, 64);
993 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
994 struct btrfs_block_group_item, flags, 64);
996 /* struct btrfs_inode_ref */
997 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
998 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1000 /* struct btrfs_inode_item */
1001 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1002 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1003 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1004 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
1005 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1006 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1007 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1008 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1009 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1010 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1011 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1012 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1015 static inline struct btrfs_timespec *
1016 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1018 unsigned long ptr = (unsigned long)inode_item;
1019 ptr += offsetof(struct btrfs_inode_item, atime);
1020 return (struct btrfs_timespec *)ptr;
1023 static inline struct btrfs_timespec *
1024 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1026 unsigned long ptr = (unsigned long)inode_item;
1027 ptr += offsetof(struct btrfs_inode_item, mtime);
1028 return (struct btrfs_timespec *)ptr;
1031 static inline struct btrfs_timespec *
1032 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1034 unsigned long ptr = (unsigned long)inode_item;
1035 ptr += offsetof(struct btrfs_inode_item, ctime);
1036 return (struct btrfs_timespec *)ptr;
1039 static inline struct btrfs_timespec *
1040 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1042 unsigned long ptr = (unsigned long)inode_item;
1043 ptr += offsetof(struct btrfs_inode_item, otime);
1044 return (struct btrfs_timespec *)ptr;
1047 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1048 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1050 /* struct btrfs_extent_item */
1051 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1053 /* struct btrfs_dev_extent */
1054 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1056 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1057 chunk_objectid, 64);
1058 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1060 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1062 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1064 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1065 return (u8 *)((unsigned long)dev + ptr);
1068 /* struct btrfs_extent_ref */
1069 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1070 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1071 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1072 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1074 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1075 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1077 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1079 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1081 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1084 /* struct btrfs_node */
1085 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1086 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1088 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1091 ptr = offsetof(struct btrfs_node, ptrs) +
1092 sizeof(struct btrfs_key_ptr) * nr;
1093 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1096 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1100 ptr = offsetof(struct btrfs_node, ptrs) +
1101 sizeof(struct btrfs_key_ptr) * nr;
1102 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1105 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1108 ptr = offsetof(struct btrfs_node, ptrs) +
1109 sizeof(struct btrfs_key_ptr) * nr;
1110 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1113 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1117 ptr = offsetof(struct btrfs_node, ptrs) +
1118 sizeof(struct btrfs_key_ptr) * nr;
1119 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1122 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1124 return offsetof(struct btrfs_node, ptrs) +
1125 sizeof(struct btrfs_key_ptr) * nr;
1128 void btrfs_node_key(struct extent_buffer *eb,
1129 struct btrfs_disk_key *disk_key, int nr);
1131 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1132 struct btrfs_disk_key *disk_key, int nr)
1135 ptr = btrfs_node_key_ptr_offset(nr);
1136 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1137 struct btrfs_key_ptr, key, disk_key);
1140 /* struct btrfs_item */
1141 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1142 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1144 static inline unsigned long btrfs_item_nr_offset(int nr)
1146 return offsetof(struct btrfs_leaf, items) +
1147 sizeof(struct btrfs_item) * nr;
1150 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1153 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1156 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1157 struct btrfs_item *item)
1159 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1162 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1164 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1167 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1169 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1172 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1174 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1177 static inline void btrfs_item_key(struct extent_buffer *eb,
1178 struct btrfs_disk_key *disk_key, int nr)
1180 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1181 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1184 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1185 struct btrfs_disk_key *disk_key, int nr)
1187 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1188 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1191 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1193 /* struct btrfs_dir_item */
1194 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1195 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1196 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1197 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1199 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1200 struct btrfs_dir_item *item,
1201 struct btrfs_disk_key *key)
1203 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1206 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1207 struct btrfs_dir_item *item,
1208 struct btrfs_disk_key *key)
1210 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1213 /* struct btrfs_disk_key */
1214 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1216 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1217 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1219 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1220 struct btrfs_disk_key *disk)
1222 cpu->offset = le64_to_cpu(disk->offset);
1223 cpu->type = disk->type;
1224 cpu->objectid = le64_to_cpu(disk->objectid);
1227 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1228 struct btrfs_key *cpu)
1230 disk->offset = cpu_to_le64(cpu->offset);
1231 disk->type = cpu->type;
1232 disk->objectid = cpu_to_le64(cpu->objectid);
1235 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1236 struct btrfs_key *key, int nr)
1238 struct btrfs_disk_key disk_key;
1239 btrfs_node_key(eb, &disk_key, nr);
1240 btrfs_disk_key_to_cpu(key, &disk_key);
1243 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1244 struct btrfs_key *key, int nr)
1246 struct btrfs_disk_key disk_key;
1247 btrfs_item_key(eb, &disk_key, nr);
1248 btrfs_disk_key_to_cpu(key, &disk_key);
1251 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1252 struct btrfs_dir_item *item,
1253 struct btrfs_key *key)
1255 struct btrfs_disk_key disk_key;
1256 btrfs_dir_item_key(eb, item, &disk_key);
1257 btrfs_disk_key_to_cpu(key, &disk_key);
1261 static inline u8 btrfs_key_type(struct btrfs_key *key)
1266 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1271 /* struct btrfs_header */
1272 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1273 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1275 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1276 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1277 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1278 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1280 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1282 return (btrfs_header_flags(eb) & flag) == flag;
1285 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1287 u64 flags = btrfs_header_flags(eb);
1288 btrfs_set_header_flags(eb, flags | flag);
1289 return (flags & flag) == flag;
1292 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1294 u64 flags = btrfs_header_flags(eb);
1295 btrfs_set_header_flags(eb, flags & ~flag);
1296 return (flags & flag) == flag;
1299 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1301 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1305 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1307 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1311 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1313 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1317 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1319 unsigned long ptr = offsetof(struct btrfs_header, csum);
1323 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1328 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1333 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1338 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1340 return (btrfs_header_level(eb) == 0);
1343 /* struct btrfs_root_item */
1344 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1345 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1346 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1348 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1349 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1350 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1351 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1352 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1353 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1354 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1356 /* struct btrfs_super_block */
1357 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1358 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1359 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1361 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1362 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1363 struct btrfs_super_block, sys_chunk_array_size, 32);
1364 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1366 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1368 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1369 chunk_root_level, 8);
1370 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1372 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1374 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1376 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1378 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1380 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1382 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1384 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1386 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1387 root_dir_objectid, 64);
1388 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1391 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1393 return offsetof(struct btrfs_leaf, items);
1396 /* struct btrfs_file_extent_item */
1397 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1399 static inline unsigned long btrfs_file_extent_inline_start(struct
1400 btrfs_file_extent_item *e)
1402 unsigned long offset = (unsigned long)e;
1403 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1407 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1409 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1412 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1413 struct btrfs_item *e)
1415 unsigned long offset;
1416 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1417 return btrfs_item_size(eb, e) - offset;
1420 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1422 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1424 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1425 disk_num_bytes, 64);
1426 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1428 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1431 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1433 return sb->s_fs_info;
1436 static inline int btrfs_set_root_name(struct btrfs_root *root,
1437 const char *name, int len)
1439 /* if we already have a name just free it */
1443 root->name = kmalloc(len+1, GFP_KERNEL);
1447 memcpy(root->name, name, len);
1448 root->name[len] ='\0';
1453 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1455 return root->leafsize;
1456 return root->nodesize;
1459 /* helper function to cast into the data area of the leaf. */
1460 #define btrfs_item_ptr(leaf, slot, type) \
1461 ((type *)(btrfs_leaf_data(leaf) + \
1462 btrfs_item_offset_nr(leaf, slot)))
1464 #define btrfs_item_ptr_offset(leaf, slot) \
1465 ((unsigned long)(btrfs_leaf_data(leaf) + \
1466 btrfs_item_offset_nr(leaf, slot)))
1468 static inline struct dentry *fdentry(struct file *file) {
1469 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1470 return file->f_dentry;
1472 return file->f_path.dentry;
1477 int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path,
1478 u64 start, u64 len);
1479 int btrfs_update_pinned_extents(struct btrfs_root *root,
1480 u64 bytenr, u64 num, int pin);
1481 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1482 struct btrfs_root *root, struct extent_buffer *leaf);
1483 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1484 struct btrfs_root *root,
1485 struct btrfs_key *key, u64 bytenr);
1486 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1487 struct btrfs_root *root);
1488 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1489 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1490 btrfs_fs_info *info,
1492 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1493 struct btrfs_block_group_cache
1494 *hint, u64 search_start,
1495 int data, int owner);
1496 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1497 struct btrfs_root *root,
1505 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1506 struct btrfs_root *root,
1507 u64 bytenr, u32 blocksize);
1508 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1509 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root,
1511 struct btrfs_path *path, u64 bytenr,
1512 u64 root_objectid, u64 ref_generation,
1513 u64 owner, u64 owner_offset);
1514 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root,
1516 u64 num_bytes, u64 min_bytes,
1517 u64 root_objectid, u64 ref_generation,
1518 u64 owner, u64 owner_offset,
1519 u64 empty_size, u64 hint_byte,
1520 u64 search_end, struct btrfs_key *ins, u64 data);
1521 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root,
1523 u64 root_objectid, u64 ref_generation,
1524 u64 owner, u64 owner_offset,
1525 struct btrfs_key *ins);
1526 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1527 struct btrfs_root *root,
1528 u64 root_objectid, u64 ref_generation,
1529 u64 owner, u64 owner_offset,
1530 struct btrfs_key *ins);
1531 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root,
1533 u64 num_bytes, u64 min_alloc_size,
1534 u64 empty_size, u64 hint_byte,
1535 u64 search_end, struct btrfs_key *ins,
1537 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1538 struct extent_buffer *buf, int cache_ref);
1539 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1540 *root, u64 bytenr, u64 num_bytes,
1541 u64 root_objectid, u64 ref_generation,
1542 u64 owner_objectid, u64 owner_offset, int pin);
1543 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1544 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1545 struct btrfs_root *root,
1546 struct extent_io_tree *unpin);
1547 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *root,
1549 u64 bytenr, u64 num_bytes,
1550 u64 root_objectid, u64 ref_generation,
1551 u64 owner, u64 owner_offset);
1552 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1553 struct btrfs_root *root);
1554 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1555 int btrfs_read_block_groups(struct btrfs_root *root);
1556 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1557 struct btrfs_root *root, u64 bytes_used,
1558 u64 type, u64 chunk_objectid, u64 chunk_offset,
1561 int btrfs_previous_item(struct btrfs_root *root,
1562 struct btrfs_path *path, u64 min_objectid,
1565 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1566 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1567 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1568 struct btrfs_key *key, int lowest_level,
1569 int cache_only, u64 min_trans);
1570 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1571 struct btrfs_key *max_key,
1572 struct btrfs_path *path, int cache_only,
1574 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root, struct extent_buffer *buf,
1576 struct extent_buffer *parent, int parent_slot,
1577 struct extent_buffer **cow_ret, u64 prealloc_dest);
1578 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 struct extent_buffer *buf,
1581 struct extent_buffer **cow_ret, u64 new_root_objectid);
1582 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1583 *root, struct btrfs_path *path, u32 data_size);
1584 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *root,
1586 struct btrfs_path *path,
1587 u32 new_size, int from_end);
1588 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1589 *root, struct btrfs_key *key, struct btrfs_path *p, int
1591 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1592 struct btrfs_root *root, struct extent_buffer *parent,
1593 int start_slot, int cache_only, u64 *last_ret,
1594 struct btrfs_key *progress);
1595 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1596 struct btrfs_path *btrfs_alloc_path(void);
1597 void btrfs_free_path(struct btrfs_path *p);
1598 void btrfs_init_path(struct btrfs_path *p);
1599 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1600 struct btrfs_path *path, int slot, int nr);
1602 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1603 struct btrfs_root *root,
1604 struct btrfs_path *path)
1606 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1609 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1610 *root, struct btrfs_key *key, void *data, u32 data_size);
1611 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *root,
1613 struct btrfs_path *path,
1614 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1616 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1617 struct btrfs_root *root,
1618 struct btrfs_path *path,
1619 struct btrfs_key *key,
1622 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1625 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1626 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1627 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1628 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1631 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1632 struct btrfs_key *key);
1633 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1634 *root, struct btrfs_key *key, struct btrfs_root_item
1636 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1637 *root, struct btrfs_key *key, struct btrfs_root_item
1639 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1640 btrfs_root_item *item, struct btrfs_key *key);
1641 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1642 u64 *found_objectid);
1643 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1644 struct btrfs_root *latest_root);
1646 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1647 *root, const char *name, int name_len, u64 dir,
1648 struct btrfs_key *location, u8 type, u64 index);
1649 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1650 struct btrfs_root *root,
1651 struct btrfs_path *path, u64 dir,
1652 const char *name, int name_len,
1654 struct btrfs_dir_item *
1655 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1656 struct btrfs_root *root,
1657 struct btrfs_path *path, u64 dir,
1658 u64 objectid, const char *name, int name_len,
1660 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1661 struct btrfs_path *path,
1662 const char *name, int name_len);
1663 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1664 struct btrfs_root *root,
1665 struct btrfs_path *path,
1666 struct btrfs_dir_item *di);
1667 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1668 struct btrfs_root *root, const char *name,
1669 u16 name_len, const void *data, u16 data_len,
1671 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1672 struct btrfs_root *root,
1673 struct btrfs_path *path, u64 dir,
1674 const char *name, u16 name_len,
1678 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1679 struct btrfs_root *root, u64 offset);
1680 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1681 struct btrfs_root *root, u64 offset);
1684 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1685 struct btrfs_root *fs_root,
1686 u64 dirid, u64 *objectid);
1687 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1690 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1691 struct btrfs_root *root,
1692 const char *name, int name_len,
1693 u64 inode_objectid, u64 ref_objectid, u64 index);
1694 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1695 struct btrfs_root *root,
1696 const char *name, int name_len,
1697 u64 inode_objectid, u64 ref_objectid, u64 *index);
1698 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root,
1700 struct btrfs_path *path, u64 objectid);
1701 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1702 *root, struct btrfs_path *path,
1703 struct btrfs_key *location, int mod);
1706 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1708 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1709 struct btrfs_root *root,
1710 u64 objectid, u64 pos, u64 disk_offset,
1712 u64 num_bytes, u64 offset);
1713 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1714 struct btrfs_root *root,
1715 struct btrfs_path *path, u64 objectid,
1716 u64 bytenr, int mod);
1717 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1718 struct btrfs_root *root, struct inode *inode,
1719 struct btrfs_ordered_sum *sums);
1720 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1722 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1723 struct btrfs_root *root,
1724 struct btrfs_path *path,
1725 u64 objectid, u64 offset,
1727 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1728 struct btrfs_root *root, struct btrfs_path *path,
1732 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1733 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1734 #define ClearPageChecked ClearPageFsMisc
1735 #define SetPageChecked SetPageFsMisc
1736 #define PageChecked PageFsMisc
1739 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1740 struct btrfs_root *root,
1741 struct inode *dir, struct inode *inode,
1742 const char *name, int name_len);
1743 int btrfs_add_link(struct btrfs_trans_handle *trans,
1744 struct inode *parent_inode, struct inode *inode,
1745 const char *name, int name_len, int add_backref, u64 index);
1746 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1747 struct btrfs_root *root,
1748 struct inode *inode, u64 new_size,
1751 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1752 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1753 int btrfs_writepages(struct address_space *mapping,
1754 struct writeback_control *wbc);
1755 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1756 struct btrfs_trans_handle *trans, u64 new_dirid,
1757 struct btrfs_block_group_cache *block_group);
1759 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1762 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1763 size_t size, struct bio *bio);
1765 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1768 if (dec <= inode->i_blocks)
1769 inode->i_blocks -= dec;
1771 inode->i_blocks = 0;
1774 unsigned long btrfs_force_ra(struct address_space *mapping,
1775 struct file_ra_state *ra, struct file *file,
1776 pgoff_t offset, pgoff_t last_index);
1777 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1779 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1780 int btrfs_readpage(struct file *file, struct page *page);
1781 void btrfs_delete_inode(struct inode *inode);
1782 void btrfs_put_inode(struct inode *inode);
1783 void btrfs_read_locked_inode(struct inode *inode);
1784 int btrfs_write_inode(struct inode *inode, int wait);
1785 void btrfs_dirty_inode(struct inode *inode);
1786 struct inode *btrfs_alloc_inode(struct super_block *sb);
1787 void btrfs_destroy_inode(struct inode *inode);
1788 int btrfs_init_cachep(void);
1789 void btrfs_destroy_cachep(void);
1790 long btrfs_ioctl_trans_end(struct file *file);
1791 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1792 struct btrfs_root *root);
1793 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1794 struct btrfs_root *root, int *is_new);
1795 int btrfs_commit_write(struct file *file, struct page *page,
1796 unsigned from, unsigned to);
1797 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1798 size_t page_offset, u64 start, u64 end,
1800 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1801 struct btrfs_root *root,
1802 struct inode *inode);
1805 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1808 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1809 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1810 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1811 extern struct file_operations btrfs_file_operations;
1812 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1813 struct btrfs_root *root, struct inode *inode,
1814 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1815 int btrfs_release_file(struct inode *inode, struct file *file);
1818 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1819 struct btrfs_root *root, int cache_only);
1822 int btrfs_init_sysfs(void);
1823 void btrfs_exit_sysfs(void);
1824 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1825 int btrfs_sysfs_add_root(struct btrfs_root *root);
1826 void btrfs_sysfs_del_root(struct btrfs_root *root);
1827 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1830 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1833 u64 btrfs_parse_size(char *str);
1834 int btrfs_parse_options(struct btrfs_root *root, char *options);
1835 int btrfs_sync_fs(struct super_block *sb, int wait);
1838 int btrfs_check_acl(struct inode *inode, int mask);
1839 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1840 int btrfs_acl_chmod(struct inode *inode);
1842 /* free-space-cache.c */
1843 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1844 u64 bytenr, u64 size);
1845 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1846 u64 bytenr, u64 size);
1847 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1849 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1850 *block_group, u64 offset,
1852 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1854 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);