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 /* dummy objectid represents multiple objectids */
85 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
88 * All files have objectids in this range.
90 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
91 #define BTRFS_LAST_FREE_OBJECTID -256ULL
92 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
96 * the device items go into the chunk tree. The key is in the form
97 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
99 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
102 * we can actually store much bigger names, but lets not confuse the rest
105 #define BTRFS_NAME_LEN 255
107 /* 32 bytes in various csum fields */
108 #define BTRFS_CSUM_SIZE 32
109 /* four bytes for CRC32 */
110 #define BTRFS_CRC32_SIZE 4
111 #define BTRFS_EMPTY_DIR_SIZE 0
113 #define BTRFS_FT_UNKNOWN 0
114 #define BTRFS_FT_REG_FILE 1
115 #define BTRFS_FT_DIR 2
116 #define BTRFS_FT_CHRDEV 3
117 #define BTRFS_FT_BLKDEV 4
118 #define BTRFS_FT_FIFO 5
119 #define BTRFS_FT_SOCK 6
120 #define BTRFS_FT_SYMLINK 7
121 #define BTRFS_FT_XATTR 8
122 #define BTRFS_FT_MAX 9
125 * the key defines the order in the tree, and so it also defines (optimal)
126 * block layout. objectid corresonds to the inode number. The flags
127 * tells us things about the object, and is a kind of stream selector.
128 * so for a given inode, keys with flags of 1 might refer to the inode
129 * data, flags of 2 may point to file data in the btree and flags == 3
130 * may point to extents.
132 * offset is the starting byte offset for this key in the stream.
134 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
135 * in cpu native order. Otherwise they are identical and their sizes
136 * should be the same (ie both packed)
138 struct btrfs_disk_key {
142 } __attribute__ ((__packed__));
148 } __attribute__ ((__packed__));
150 struct btrfs_mapping_tree {
151 struct extent_map_tree map_tree;
154 #define BTRFS_UUID_SIZE 16
155 struct btrfs_dev_item {
156 /* the internal btrfs device id */
159 /* size of the device */
165 /* optimal io alignment for this device */
168 /* optimal io width for this device */
171 /* minimal io size for this device */
174 /* type and info about this device */
177 /* grouping information for allocation decisions */
180 /* seek speed 0-100 where 100 is fastest */
183 /* bandwidth 0-100 where 100 is fastest */
186 /* btrfs generated uuid for this device */
187 u8 uuid[BTRFS_UUID_SIZE];
188 } __attribute__ ((__packed__));
190 struct btrfs_stripe {
193 u8 dev_uuid[BTRFS_UUID_SIZE];
194 } __attribute__ ((__packed__));
197 /* size of this chunk in bytes */
200 /* objectid of the root referencing this chunk */
206 /* optimal io alignment for this chunk */
209 /* optimal io width for this chunk */
212 /* minimal io size for this chunk */
215 /* 2^16 stripes is quite a lot, a second limit is the size of a single
220 /* sub stripes only matter for raid10 */
222 struct btrfs_stripe stripe;
223 /* additional stripes go here */
224 } __attribute__ ((__packed__));
226 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
228 BUG_ON(num_stripes == 0);
229 return sizeof(struct btrfs_chunk) +
230 sizeof(struct btrfs_stripe) * (num_stripes - 1);
233 #define BTRFS_FSID_SIZE 16
234 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
237 * every tree block (leaf or node) starts with this header.
239 struct btrfs_header {
240 /* these first four must match the super block */
241 u8 csum[BTRFS_CSUM_SIZE];
242 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
243 __le64 bytenr; /* which block this node is supposed to live in */
246 /* allowed to be different from the super from here on down */
247 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
252 } __attribute__ ((__packed__));
254 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
255 sizeof(struct btrfs_header)) / \
256 sizeof(struct btrfs_key_ptr))
257 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
258 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
259 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
260 sizeof(struct btrfs_item) - \
261 sizeof(struct btrfs_file_extent_item))
265 * this is a very generous portion of the super block, giving us
266 * room to translate 14 chunks with 3 stripes each.
268 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
269 #define BTRFS_LABEL_SIZE 256
272 * the super block basically lists the main trees of the FS
273 * it currently lacks any block count etc etc
275 struct btrfs_super_block {
276 u8 csum[BTRFS_CSUM_SIZE];
277 /* the first 4 fields must match struct btrfs_header */
278 u8 fsid[16]; /* FS specific uuid */
279 __le64 bytenr; /* this block number */
282 /* allowed to be different from the btrfs_header from here own down */
290 __le64 root_dir_objectid;
296 __le32 sys_chunk_array_size;
300 struct btrfs_dev_item dev_item;
301 char label[BTRFS_LABEL_SIZE];
302 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
303 } __attribute__ ((__packed__));
306 * A leaf is full of items. offset and size tell us where to find
307 * the item in the leaf (relative to the start of the data area)
310 struct btrfs_disk_key key;
313 } __attribute__ ((__packed__));
316 * leaves have an item area and a data area:
317 * [item0, item1....itemN] [free space] [dataN...data1, data0]
319 * The data is separate from the items to get the keys closer together
323 struct btrfs_header header;
324 struct btrfs_item items[];
325 } __attribute__ ((__packed__));
328 * all non-leaf blocks are nodes, they hold only keys and pointers to
331 struct btrfs_key_ptr {
332 struct btrfs_disk_key key;
335 } __attribute__ ((__packed__));
338 struct btrfs_header header;
339 struct btrfs_key_ptr ptrs[];
340 } __attribute__ ((__packed__));
343 * btrfs_paths remember the path taken from the root down to the leaf.
344 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
345 * to any other levels that are present.
347 * The slots array records the index of the item or block pointer
348 * used while walking the tree.
351 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
352 int slots[BTRFS_MAX_LEVEL];
353 /* if there is real range locking, this locks field will change */
354 int locks[BTRFS_MAX_LEVEL];
356 /* keep some upper locks as we walk down */
363 * items in the extent btree are used to record the objectid of the
364 * owner of the block and the number of references
366 struct btrfs_extent_item {
368 } __attribute__ ((__packed__));
370 struct btrfs_extent_ref {
376 } __attribute__ ((__packed__));
378 /* dev extents record free space on individual devices. The owner
379 * field points back to the chunk allocation mapping tree that allocated
380 * the extent. The chunk tree uuid field is a way to double check the owner
382 struct btrfs_dev_extent {
384 __le64 chunk_objectid;
387 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
388 } __attribute__ ((__packed__));
390 struct btrfs_inode_ref {
394 } __attribute__ ((__packed__));
396 struct btrfs_timespec {
399 } __attribute__ ((__packed__));
402 * there is no padding here on purpose. If you want to extent the inode,
403 * make a new item type
405 struct btrfs_inode_item {
406 /* nfs style generation number */
408 /* transid that last touched this inode */
420 struct btrfs_timespec atime;
421 struct btrfs_timespec ctime;
422 struct btrfs_timespec mtime;
423 struct btrfs_timespec otime;
424 } __attribute__ ((__packed__));
426 struct btrfs_dir_log_item {
428 } __attribute__ ((__packed__));
430 struct btrfs_dir_item {
431 struct btrfs_disk_key location;
436 } __attribute__ ((__packed__));
438 struct btrfs_root_item {
439 struct btrfs_inode_item inode;
446 struct btrfs_disk_key drop_progress;
449 } __attribute__ ((__packed__));
451 #define BTRFS_FILE_EXTENT_REG 0
452 #define BTRFS_FILE_EXTENT_INLINE 1
454 struct btrfs_file_extent_item {
458 * disk space consumed by the extent, checksum blocks are included
462 __le64 disk_num_bytes;
464 * the logical offset in file blocks (no csums)
465 * this extent record is for. This allows a file extent to point
466 * into the middle of an existing extent on disk, sharing it
467 * between two snapshots (useful if some bytes in the middle of the
468 * extent have changed
472 * the logical number of file blocks (no csums included)
475 } __attribute__ ((__packed__));
477 struct btrfs_csum_item {
479 } __attribute__ ((__packed__));
481 /* different types of block groups (and chunks) */
482 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
483 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
484 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
485 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
486 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
487 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
488 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
490 struct btrfs_block_group_item {
492 __le64 chunk_objectid;
494 } __attribute__ ((__packed__));
496 struct btrfs_space_info {
503 struct list_head list;
505 /* for block groups in our same type */
506 struct list_head block_groups;
510 struct btrfs_free_space {
511 struct rb_node bytes_index;
512 struct rb_node offset_index;
517 struct btrfs_block_group_cache {
518 struct btrfs_key key;
519 struct btrfs_block_group_item item;
527 struct btrfs_space_info *space_info;
529 /* free space cache stuff */
530 struct rb_root free_space_bytes;
531 struct rb_root free_space_offset;
533 /* block group cache stuff */
534 struct rb_node cache_node;
536 /* for block groups in the same raid type */
537 struct list_head list;
541 struct btrfs_fs_devices;
542 struct btrfs_fs_info {
543 u8 fsid[BTRFS_FSID_SIZE];
544 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
545 struct btrfs_root *extent_root;
546 struct btrfs_root *tree_root;
547 struct btrfs_root *chunk_root;
548 struct btrfs_root *dev_root;
550 /* the log root tree is a directory of all the other log roots */
551 struct btrfs_root *log_root_tree;
552 struct radix_tree_root fs_roots_radix;
554 /* block group cache stuff */
555 spinlock_t block_group_cache_lock;
556 struct rb_root block_group_cache_tree;
558 struct extent_io_tree pinned_extents;
559 struct extent_io_tree pending_del;
560 struct extent_io_tree extent_ins;
562 /* logical->physical extent mapping */
563 struct btrfs_mapping_tree mapping_tree;
566 u64 last_trans_committed;
567 u64 last_trans_new_blockgroup;
568 u64 open_ioctl_trans;
569 unsigned long mount_opt;
573 struct btrfs_transaction *running_transaction;
574 wait_queue_head_t transaction_throttle;
575 wait_queue_head_t transaction_wait;
576 wait_queue_head_t async_submit_wait;
578 wait_queue_head_t tree_log_wait;
580 struct btrfs_super_block super_copy;
581 struct btrfs_super_block super_for_commit;
582 struct block_device *__bdev;
583 struct super_block *sb;
584 struct inode *btree_inode;
585 struct backing_dev_info bdi;
586 spinlock_t hash_lock;
587 struct mutex trans_mutex;
588 struct mutex tree_log_mutex;
589 struct mutex transaction_kthread_mutex;
590 struct mutex cleaner_mutex;
591 struct mutex alloc_mutex;
592 struct mutex chunk_mutex;
593 struct mutex drop_mutex;
594 struct mutex volume_mutex;
595 struct list_head trans_list;
596 struct list_head hashers;
597 struct list_head dead_roots;
599 atomic_t nr_async_submits;
600 atomic_t nr_async_bios;
601 atomic_t tree_log_writers;
602 atomic_t tree_log_commit;
603 unsigned long tree_log_batch;
604 u64 tree_log_transid;
607 * this is used by the balancing code to wait for all the pending
610 spinlock_t ordered_extent_lock;
611 struct list_head ordered_extents;
612 struct list_head delalloc_inodes;
615 * there is a pool of worker threads for checksumming during writes
616 * and a pool for checksumming after reads. This is because readers
617 * can run with FS locks held, and the writers may be waiting for
618 * those locks. We don't want ordering in the pending list to cause
619 * deadlocks, and so the two are serviced separately.
621 * A third pool does submit_bio to avoid deadlocking with the other
624 struct btrfs_workers workers;
625 struct btrfs_workers endio_workers;
626 struct btrfs_workers endio_write_workers;
627 struct btrfs_workers submit_workers;
629 * fixup workers take dirty pages that didn't properly go through
630 * the cow mechanism and make them safe to write. It happens
631 * for the sys_munmap function call path
633 struct btrfs_workers fixup_workers;
634 struct task_struct *transaction_kthread;
635 struct task_struct *cleaner_kthread;
636 int thread_pool_size;
638 struct kobject super_kobj;
639 struct completion kobj_unregister;
642 int log_root_recovering;
644 atomic_t throttle_gen;
647 struct list_head dirty_cowonly_roots;
649 struct btrfs_fs_devices *fs_devices;
650 struct list_head space_info;
651 spinlock_t delalloc_lock;
652 spinlock_t new_trans_lock;
658 spinlock_t ref_cache_lock;
659 u64 total_ref_cache_size;
661 u64 avail_data_alloc_bits;
662 u64 avail_metadata_alloc_bits;
663 u64 avail_system_alloc_bits;
664 u64 data_alloc_profile;
665 u64 metadata_alloc_profile;
666 u64 system_alloc_profile;
671 struct btrfs_leaf_ref_tree {
673 struct btrfs_leaf_ref *last;
674 struct list_head list;
679 * in ram representation of the tree. extent_root is used for all allocations
680 * and for the extent tree extent_root root.
682 struct btrfs_dirty_root;
684 struct extent_buffer *node;
686 /* the node lock is held while changing the node pointer */
687 spinlock_t node_lock;
689 struct extent_buffer *commit_root;
690 struct btrfs_leaf_ref_tree *ref_tree;
691 struct btrfs_leaf_ref_tree ref_tree_struct;
692 struct btrfs_dirty_root *dirty_root;
693 struct btrfs_root *log_root;
695 struct btrfs_root_item root_item;
696 struct btrfs_key root_key;
697 struct btrfs_fs_info *fs_info;
699 struct extent_io_tree dirty_log_pages;
701 struct kobject root_kobj;
702 struct completion kobj_unregister;
703 struct mutex objectid_mutex;
704 struct mutex log_mutex;
709 /* data allocations are done in sectorsize units */
712 /* node allocations are done in nodesize units */
715 /* leaf allocations are done in leafsize units */
722 u64 last_inode_alloc;
725 u64 defrag_trans_start;
726 struct btrfs_key defrag_progress;
727 struct btrfs_key defrag_max;
733 /* the dirty list is only used by non-reference counted roots */
734 struct list_head dirty_list;
736 spinlock_t list_lock;
737 struct list_head dead_list;
738 struct list_head orphan_list;
743 * inode items have the data typically returned from stat and store other
744 * info about object characteristics. There is one for every file and dir in
747 #define BTRFS_INODE_ITEM_KEY 1
748 #define BTRFS_INODE_REF_KEY 2
749 #define BTRFS_XATTR_ITEM_KEY 8
750 #define BTRFS_ORPHAN_ITEM_KEY 9
751 /* reserve 2-15 close to the inode for later flexibility */
754 * dir items are the name -> inode pointers in a directory. There is one
755 * for every name in a directory.
757 #define BTRFS_DIR_LOG_ITEM_KEY 14
758 #define BTRFS_DIR_LOG_INDEX_KEY 15
759 #define BTRFS_DIR_ITEM_KEY 16
760 #define BTRFS_DIR_INDEX_KEY 17
762 * extent data is for file data
764 #define BTRFS_EXTENT_DATA_KEY 18
766 * csum items have the checksums for data in the extents
768 #define BTRFS_CSUM_ITEM_KEY 19
771 /* reserve 21-31 for other file/dir stuff */
774 * root items point to tree roots. There are typically in the root
775 * tree used by the super block to find all the other trees
777 #define BTRFS_ROOT_ITEM_KEY 32
779 * extent items are in the extent map tree. These record which blocks
780 * are used, and how many references there are to each block
782 #define BTRFS_EXTENT_ITEM_KEY 33
783 #define BTRFS_EXTENT_REF_KEY 34
786 * block groups give us hints into the extent allocation trees. Which
787 * blocks are free etc etc
789 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
791 #define BTRFS_DEV_EXTENT_KEY 75
792 #define BTRFS_DEV_ITEM_KEY 76
793 #define BTRFS_CHUNK_ITEM_KEY 77
796 * string items are for debugging. They just store a short string of
799 #define BTRFS_STRING_ITEM_KEY 253
801 #define BTRFS_MOUNT_NODATASUM (1 << 0)
802 #define BTRFS_MOUNT_NODATACOW (1 << 1)
803 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
804 #define BTRFS_MOUNT_SSD (1 << 3)
805 #define BTRFS_MOUNT_DEGRADED (1 << 4)
807 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
808 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
809 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
814 #define BTRFS_INODE_NODATASUM (1 << 0)
815 #define BTRFS_INODE_NODATACOW (1 << 1)
816 #define BTRFS_INODE_READONLY (1 << 2)
817 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
819 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
821 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
823 /* some macros to generate set/get funcs for the struct fields. This
824 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
827 #define le8_to_cpu(v) (v)
828 #define cpu_to_le8(v) (v)
831 #define read_eb_member(eb, ptr, type, member, result) ( \
832 read_extent_buffer(eb, (char *)(result), \
833 ((unsigned long)(ptr)) + \
834 offsetof(type, member), \
835 sizeof(((type *)0)->member)))
837 #define write_eb_member(eb, ptr, type, member, result) ( \
838 write_extent_buffer(eb, (char *)(result), \
839 ((unsigned long)(ptr)) + \
840 offsetof(type, member), \
841 sizeof(((type *)0)->member)))
843 #ifndef BTRFS_SETGET_FUNCS
844 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
845 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
846 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
849 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
850 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
852 type *p = kmap_atomic(eb->first_page, KM_USER0); \
853 u##bits res = le##bits##_to_cpu(p->member); \
854 kunmap_atomic(p, KM_USER0); \
857 static inline void btrfs_set_##name(struct extent_buffer *eb, \
860 type *p = kmap_atomic(eb->first_page, KM_USER0); \
861 p->member = cpu_to_le##bits(val); \
862 kunmap_atomic(p, KM_USER0); \
865 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
866 static inline u##bits btrfs_##name(type *s) \
868 return le##bits##_to_cpu(s->member); \
870 static inline void btrfs_set_##name(type *s, u##bits val) \
872 s->member = cpu_to_le##bits(val); \
875 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
876 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
877 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
878 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
879 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
880 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
881 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
882 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
883 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
884 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
886 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
887 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
889 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
891 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
893 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
895 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
897 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
898 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
900 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
902 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
905 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
907 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
910 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
911 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
912 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
913 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
914 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
915 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
916 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
917 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
918 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
919 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
920 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
922 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
924 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
927 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
928 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
929 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
931 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
933 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
935 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
937 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
938 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
940 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
942 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
943 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
945 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
948 unsigned long offset = (unsigned long)c;
949 offset += offsetof(struct btrfs_chunk, stripe);
950 offset += nr * sizeof(struct btrfs_stripe);
951 return (struct btrfs_stripe *)offset;
954 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
956 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
959 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
960 struct btrfs_chunk *c, int nr)
962 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
965 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
966 struct btrfs_chunk *c, int nr,
969 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
972 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
973 struct btrfs_chunk *c, int nr)
975 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
978 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
979 struct btrfs_chunk *c, int nr,
982 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
985 /* struct btrfs_block_group_item */
986 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
988 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
990 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
991 struct btrfs_block_group_item, chunk_objectid, 64);
993 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
994 struct btrfs_block_group_item, chunk_objectid, 64);
995 BTRFS_SETGET_FUNCS(disk_block_group_flags,
996 struct btrfs_block_group_item, flags, 64);
997 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
998 struct btrfs_block_group_item, flags, 64);
1000 /* struct btrfs_inode_ref */
1001 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1002 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1004 /* struct btrfs_inode_item */
1005 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1006 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1007 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1008 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
1009 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1010 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1011 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1012 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1013 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1014 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1015 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
1016 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
1019 static inline struct btrfs_timespec *
1020 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1022 unsigned long ptr = (unsigned long)inode_item;
1023 ptr += offsetof(struct btrfs_inode_item, atime);
1024 return (struct btrfs_timespec *)ptr;
1027 static inline struct btrfs_timespec *
1028 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1030 unsigned long ptr = (unsigned long)inode_item;
1031 ptr += offsetof(struct btrfs_inode_item, mtime);
1032 return (struct btrfs_timespec *)ptr;
1035 static inline struct btrfs_timespec *
1036 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1038 unsigned long ptr = (unsigned long)inode_item;
1039 ptr += offsetof(struct btrfs_inode_item, ctime);
1040 return (struct btrfs_timespec *)ptr;
1043 static inline struct btrfs_timespec *
1044 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1046 unsigned long ptr = (unsigned long)inode_item;
1047 ptr += offsetof(struct btrfs_inode_item, otime);
1048 return (struct btrfs_timespec *)ptr;
1051 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1052 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1054 /* struct btrfs_dev_extent */
1055 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1057 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1058 chunk_objectid, 64);
1059 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1061 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1063 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1065 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1066 return (u8 *)((unsigned long)dev + ptr);
1069 /* struct btrfs_extent_ref */
1070 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1071 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1072 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1073 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1074 BTRFS_SETGET_FUNCS(ref_num_refs, struct btrfs_extent_ref, num_refs, 32);
1076 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1077 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1079 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1081 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref,
1083 BTRFS_SETGET_STACK_FUNCS(stack_ref_num_refs, struct btrfs_extent_ref,
1086 /* struct btrfs_extent_item */
1087 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1088 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1091 /* struct btrfs_node */
1092 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1093 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1095 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1098 ptr = offsetof(struct btrfs_node, ptrs) +
1099 sizeof(struct btrfs_key_ptr) * nr;
1100 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1103 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1107 ptr = offsetof(struct btrfs_node, ptrs) +
1108 sizeof(struct btrfs_key_ptr) * nr;
1109 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1112 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1115 ptr = offsetof(struct btrfs_node, ptrs) +
1116 sizeof(struct btrfs_key_ptr) * nr;
1117 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1120 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1124 ptr = offsetof(struct btrfs_node, ptrs) +
1125 sizeof(struct btrfs_key_ptr) * nr;
1126 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1129 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1131 return offsetof(struct btrfs_node, ptrs) +
1132 sizeof(struct btrfs_key_ptr) * nr;
1135 void btrfs_node_key(struct extent_buffer *eb,
1136 struct btrfs_disk_key *disk_key, int nr);
1138 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1139 struct btrfs_disk_key *disk_key, int nr)
1142 ptr = btrfs_node_key_ptr_offset(nr);
1143 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1144 struct btrfs_key_ptr, key, disk_key);
1147 /* struct btrfs_item */
1148 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1149 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1151 static inline unsigned long btrfs_item_nr_offset(int nr)
1153 return offsetof(struct btrfs_leaf, items) +
1154 sizeof(struct btrfs_item) * nr;
1157 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1160 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1163 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1164 struct btrfs_item *item)
1166 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1169 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1171 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1174 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1176 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1179 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1181 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1184 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1191 static inline void btrfs_set_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 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1198 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1200 /* struct btrfs_dir_item */
1201 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1202 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1203 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1204 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1206 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1207 struct btrfs_dir_item *item,
1208 struct btrfs_disk_key *key)
1210 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1213 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1214 struct btrfs_dir_item *item,
1215 struct btrfs_disk_key *key)
1217 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1220 /* struct btrfs_disk_key */
1221 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1223 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1224 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1226 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1227 struct btrfs_disk_key *disk)
1229 cpu->offset = le64_to_cpu(disk->offset);
1230 cpu->type = disk->type;
1231 cpu->objectid = le64_to_cpu(disk->objectid);
1234 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1235 struct btrfs_key *cpu)
1237 disk->offset = cpu_to_le64(cpu->offset);
1238 disk->type = cpu->type;
1239 disk->objectid = cpu_to_le64(cpu->objectid);
1242 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1243 struct btrfs_key *key, int nr)
1245 struct btrfs_disk_key disk_key;
1246 btrfs_node_key(eb, &disk_key, nr);
1247 btrfs_disk_key_to_cpu(key, &disk_key);
1250 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1251 struct btrfs_key *key, int nr)
1253 struct btrfs_disk_key disk_key;
1254 btrfs_item_key(eb, &disk_key, nr);
1255 btrfs_disk_key_to_cpu(key, &disk_key);
1258 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1259 struct btrfs_dir_item *item,
1260 struct btrfs_key *key)
1262 struct btrfs_disk_key disk_key;
1263 btrfs_dir_item_key(eb, item, &disk_key);
1264 btrfs_disk_key_to_cpu(key, &disk_key);
1268 static inline u8 btrfs_key_type(struct btrfs_key *key)
1273 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1278 /* struct btrfs_header */
1279 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1280 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1282 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1283 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1284 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1285 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1287 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1289 return (btrfs_header_flags(eb) & flag) == flag;
1292 static inline int btrfs_set_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 int btrfs_clear_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 u8 *btrfs_header_fsid(struct extent_buffer *eb)
1308 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1312 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1314 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1318 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1320 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1324 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1326 unsigned long ptr = offsetof(struct btrfs_header, csum);
1330 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1335 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1340 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1345 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1347 return (btrfs_header_level(eb) == 0);
1350 /* struct btrfs_root_item */
1351 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1352 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1353 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1355 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1356 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1357 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1358 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1359 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1360 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1361 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1363 /* struct btrfs_super_block */
1364 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1365 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1366 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1368 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1369 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1370 struct btrfs_super_block, sys_chunk_array_size, 32);
1371 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1373 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1375 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1376 chunk_root_level, 8);
1377 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1379 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1381 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1383 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1385 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1387 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1389 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1391 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1393 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1394 root_dir_objectid, 64);
1395 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1398 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1400 return offsetof(struct btrfs_leaf, items);
1403 /* struct btrfs_file_extent_item */
1404 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1406 static inline unsigned long btrfs_file_extent_inline_start(struct
1407 btrfs_file_extent_item *e)
1409 unsigned long offset = (unsigned long)e;
1410 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1414 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1416 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1419 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1420 struct btrfs_item *e)
1422 unsigned long offset;
1423 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1424 return btrfs_item_size(eb, e) - offset;
1427 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1429 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1431 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1432 disk_num_bytes, 64);
1433 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1435 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1438 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1440 return sb->s_fs_info;
1443 static inline int btrfs_set_root_name(struct btrfs_root *root,
1444 const char *name, int len)
1446 /* if we already have a name just free it */
1450 root->name = kmalloc(len+1, GFP_KERNEL);
1454 memcpy(root->name, name, len);
1455 root->name[len] ='\0';
1460 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1462 return root->leafsize;
1463 return root->nodesize;
1466 /* helper function to cast into the data area of the leaf. */
1467 #define btrfs_item_ptr(leaf, slot, type) \
1468 ((type *)(btrfs_leaf_data(leaf) + \
1469 btrfs_item_offset_nr(leaf, slot)))
1471 #define btrfs_item_ptr_offset(leaf, slot) \
1472 ((unsigned long)(btrfs_leaf_data(leaf) + \
1473 btrfs_item_offset_nr(leaf, slot)))
1475 static inline struct dentry *fdentry(struct file *file) {
1476 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1477 return file->f_dentry;
1479 return file->f_path.dentry;
1484 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
1485 int btrfs_update_pinned_extents(struct btrfs_root *root,
1486 u64 bytenr, u64 num, int pin);
1487 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root, struct extent_buffer *leaf);
1489 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1490 struct btrfs_root *root,
1491 struct btrfs_key *key, u64 bytenr);
1492 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1493 struct btrfs_root *root);
1494 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1495 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1496 btrfs_fs_info *info,
1498 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1499 struct btrfs_block_group_cache
1500 *hint, u64 search_start,
1501 int data, int owner);
1502 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1503 struct btrfs_root *root,
1504 u32 blocksize, u64 parent,
1510 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1511 struct btrfs_root *root,
1512 u64 bytenr, u32 blocksize);
1513 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1514 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1515 struct btrfs_root *root,
1516 struct btrfs_path *path,
1517 u64 bytenr, u64 parent,
1518 u64 root_objectid, u64 ref_generation,
1519 u64 owner, u64 owner_offset);
1520 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1521 struct btrfs_root *root,
1522 u64 num_bytes, u64 parent, u64 min_bytes,
1523 u64 root_objectid, u64 ref_generation,
1524 u64 owner, u64 owner_offset,
1525 u64 empty_size, u64 hint_byte,
1526 u64 search_end, struct btrfs_key *ins, u64 data);
1527 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1528 struct btrfs_root *root, u64 parent,
1529 u64 root_objectid, u64 ref_generation,
1530 u64 owner, u64 owner_offset,
1531 struct btrfs_key *ins);
1532 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1533 struct btrfs_root *root, u64 parent,
1534 u64 root_objectid, u64 ref_generation,
1535 u64 owner, u64 owner_offset,
1536 struct btrfs_key *ins);
1537 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1538 struct btrfs_root *root,
1539 u64 num_bytes, u64 min_alloc_size,
1540 u64 empty_size, u64 hint_byte,
1541 u64 search_end, struct btrfs_key *ins,
1543 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1544 struct extent_buffer *orig_buf, struct extent_buffer *buf,
1546 int btrfs_cache_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1547 struct extent_buffer *buf, u32 nr_extents);
1548 int btrfs_update_ref(struct btrfs_trans_handle *trans,
1549 struct btrfs_root *root, struct extent_buffer *orig_buf,
1550 struct extent_buffer *buf, int start_slot, int nr);
1551 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1552 struct btrfs_root *root,
1553 u64 bytenr, u64 num_bytes, u64 parent,
1554 u64 root_objectid, u64 ref_generation,
1555 u64 owner_objectid, u64 owner_offset, int pin);
1556 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1557 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1558 struct btrfs_root *root,
1559 struct extent_io_tree *unpin);
1560 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1561 struct btrfs_root *root,
1562 u64 bytenr, u64 num_bytes, u64 parent,
1563 u64 root_objectid, u64 ref_generation,
1564 u64 owner, u64 owner_offset);
1565 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1566 struct btrfs_root *root, u64 bytenr,
1567 u64 orig_parent, u64 parent,
1568 u64 root_objectid, u64 ref_generation,
1569 u64 owner, u64 owner_offset);
1570 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1571 struct btrfs_root *root);
1572 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1573 int btrfs_read_block_groups(struct btrfs_root *root);
1574 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root, u64 bytes_used,
1576 u64 type, u64 chunk_objectid, u64 chunk_offset,
1579 int btrfs_previous_item(struct btrfs_root *root,
1580 struct btrfs_path *path, u64 min_objectid,
1582 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1583 struct btrfs_root *root, struct btrfs_path *path,
1584 struct btrfs_key *new_key);
1585 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1586 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1587 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1588 struct btrfs_key *key, int lowest_level,
1589 int cache_only, u64 min_trans);
1590 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1591 struct btrfs_key *max_key,
1592 struct btrfs_path *path, int cache_only,
1594 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1595 struct btrfs_root *root, struct extent_buffer *buf,
1596 struct extent_buffer *parent, int parent_slot,
1597 struct extent_buffer **cow_ret, u64 prealloc_dest);
1598 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1599 struct btrfs_root *root,
1600 struct extent_buffer *buf,
1601 struct extent_buffer **cow_ret, u64 new_root_objectid);
1602 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1603 *root, struct btrfs_path *path, u32 data_size);
1604 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1605 struct btrfs_root *root,
1606 struct btrfs_path *path,
1607 u32 new_size, int from_end);
1608 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1609 *root, struct btrfs_key *key, struct btrfs_path *p, int
1611 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1612 struct btrfs_root *root, struct extent_buffer *parent,
1613 int start_slot, int cache_only, u64 *last_ret,
1614 struct btrfs_key *progress);
1615 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1616 struct btrfs_path *btrfs_alloc_path(void);
1617 void btrfs_free_path(struct btrfs_path *p);
1618 void btrfs_init_path(struct btrfs_path *p);
1619 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1620 struct btrfs_path *path, int slot, int nr);
1622 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1623 struct btrfs_root *root,
1624 struct btrfs_path *path)
1626 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1629 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1630 *root, struct btrfs_key *key, void *data, u32 data_size);
1631 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1632 struct btrfs_root *root,
1633 struct btrfs_path *path,
1634 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1636 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1637 struct btrfs_root *root,
1638 struct btrfs_path *path,
1639 struct btrfs_key *key,
1642 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1645 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1646 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1647 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1648 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1651 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1652 struct btrfs_key *key);
1653 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1654 *root, struct btrfs_key *key, struct btrfs_root_item
1656 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1657 *root, struct btrfs_key *key, struct btrfs_root_item
1659 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1660 btrfs_root_item *item, struct btrfs_key *key);
1661 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1662 u64 *found_objectid);
1663 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1664 struct btrfs_root *latest_root);
1666 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1667 *root, const char *name, int name_len, u64 dir,
1668 struct btrfs_key *location, u8 type, u64 index);
1669 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1670 struct btrfs_root *root,
1671 struct btrfs_path *path, u64 dir,
1672 const char *name, int name_len,
1674 struct btrfs_dir_item *
1675 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1676 struct btrfs_root *root,
1677 struct btrfs_path *path, u64 dir,
1678 u64 objectid, const char *name, int name_len,
1680 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1681 struct btrfs_path *path,
1682 const char *name, int name_len);
1683 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1684 struct btrfs_root *root,
1685 struct btrfs_path *path,
1686 struct btrfs_dir_item *di);
1687 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1688 struct btrfs_root *root, const char *name,
1689 u16 name_len, const void *data, u16 data_len,
1691 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1692 struct btrfs_root *root,
1693 struct btrfs_path *path, u64 dir,
1694 const char *name, u16 name_len,
1698 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root, u64 offset);
1700 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1701 struct btrfs_root *root, u64 offset);
1704 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1705 struct btrfs_root *fs_root,
1706 u64 dirid, u64 *objectid);
1707 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1710 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1711 struct btrfs_root *root,
1712 const char *name, int name_len,
1713 u64 inode_objectid, u64 ref_objectid, u64 index);
1714 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1715 struct btrfs_root *root,
1716 const char *name, int name_len,
1717 u64 inode_objectid, u64 ref_objectid, u64 *index);
1718 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1719 struct btrfs_root *root,
1720 struct btrfs_path *path, u64 objectid);
1721 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1722 *root, struct btrfs_path *path,
1723 struct btrfs_key *location, int mod);
1726 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1728 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1729 struct btrfs_root *root,
1730 u64 objectid, u64 pos, u64 disk_offset,
1732 u64 num_bytes, u64 offset);
1733 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1734 struct btrfs_root *root,
1735 struct btrfs_path *path, u64 objectid,
1736 u64 bytenr, int mod);
1737 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1738 struct btrfs_root *root, struct inode *inode,
1739 struct btrfs_ordered_sum *sums);
1740 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1742 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1743 struct btrfs_root *root,
1744 struct btrfs_path *path,
1745 u64 objectid, u64 offset,
1747 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1748 struct btrfs_root *root, struct btrfs_path *path,
1752 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1753 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1754 #define ClearPageChecked ClearPageFsMisc
1755 #define SetPageChecked SetPageFsMisc
1756 #define PageChecked PageFsMisc
1759 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1760 struct btrfs_root *root,
1761 struct inode *dir, struct inode *inode,
1762 const char *name, int name_len);
1763 int btrfs_add_link(struct btrfs_trans_handle *trans,
1764 struct inode *parent_inode, struct inode *inode,
1765 const char *name, int name_len, int add_backref, u64 index);
1766 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1767 struct btrfs_root *root,
1768 struct inode *inode, u64 new_size,
1771 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1772 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1773 int btrfs_writepages(struct address_space *mapping,
1774 struct writeback_control *wbc);
1775 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1776 struct btrfs_trans_handle *trans, u64 new_dirid,
1777 struct btrfs_block_group_cache *block_group);
1779 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1782 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1783 size_t size, struct bio *bio);
1785 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1788 if (dec <= inode->i_blocks)
1789 inode->i_blocks -= dec;
1791 inode->i_blocks = 0;
1794 unsigned long btrfs_force_ra(struct address_space *mapping,
1795 struct file_ra_state *ra, struct file *file,
1796 pgoff_t offset, pgoff_t last_index);
1797 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1799 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1800 int btrfs_readpage(struct file *file, struct page *page);
1801 void btrfs_delete_inode(struct inode *inode);
1802 void btrfs_put_inode(struct inode *inode);
1803 void btrfs_read_locked_inode(struct inode *inode);
1804 int btrfs_write_inode(struct inode *inode, int wait);
1805 void btrfs_dirty_inode(struct inode *inode);
1806 struct inode *btrfs_alloc_inode(struct super_block *sb);
1807 void btrfs_destroy_inode(struct inode *inode);
1808 int btrfs_init_cachep(void);
1809 void btrfs_destroy_cachep(void);
1810 long btrfs_ioctl_trans_end(struct file *file);
1811 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1812 struct btrfs_root *root);
1813 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1814 struct btrfs_root *root, int *is_new);
1815 int btrfs_commit_write(struct file *file, struct page *page,
1816 unsigned from, unsigned to);
1817 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1818 size_t page_offset, u64 start, u64 end,
1820 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1821 struct btrfs_root *root,
1822 struct inode *inode);
1825 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1828 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1829 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1830 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1831 extern struct file_operations btrfs_file_operations;
1832 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1833 struct btrfs_root *root, struct inode *inode,
1834 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1835 int btrfs_release_file(struct inode *inode, struct file *file);
1838 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1839 struct btrfs_root *root, int cache_only);
1842 int btrfs_init_sysfs(void);
1843 void btrfs_exit_sysfs(void);
1844 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1845 int btrfs_sysfs_add_root(struct btrfs_root *root);
1846 void btrfs_sysfs_del_root(struct btrfs_root *root);
1847 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1850 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1853 u64 btrfs_parse_size(char *str);
1854 int btrfs_parse_options(struct btrfs_root *root, char *options);
1855 int btrfs_sync_fs(struct super_block *sb, int wait);
1858 int btrfs_check_acl(struct inode *inode, int mask);
1859 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1860 int btrfs_acl_chmod(struct inode *inode);
1862 /* free-space-cache.c */
1863 int btrfs_add_free_space(struct btrfs_block_group_cache *block_group,
1864 u64 bytenr, u64 size);
1865 int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group,
1866 u64 bytenr, u64 size);
1867 void btrfs_remove_free_space_cache(struct btrfs_block_group_cache
1869 struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache
1870 *block_group, u64 offset,
1872 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
1874 u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group);