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)
487 struct btrfs_block_group_item {
489 __le64 chunk_objectid;
491 } __attribute__ ((__packed__));
493 struct btrfs_space_info {
500 struct list_head list;
503 struct btrfs_block_group_cache {
504 struct btrfs_key key;
505 struct btrfs_block_group_item item;
506 struct btrfs_space_info *space_info;
515 struct btrfs_fs_devices;
516 struct btrfs_fs_info {
517 u8 fsid[BTRFS_FSID_SIZE];
518 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
519 struct btrfs_root *extent_root;
520 struct btrfs_root *tree_root;
521 struct btrfs_root *chunk_root;
522 struct btrfs_root *dev_root;
524 /* the log root tree is a directory of all the other log roots */
525 struct btrfs_root *log_root_tree;
526 struct radix_tree_root fs_roots_radix;
528 struct extent_io_tree free_space_cache;
529 struct extent_io_tree block_group_cache;
530 struct extent_io_tree pinned_extents;
531 struct extent_io_tree pending_del;
532 struct extent_io_tree extent_ins;
534 /* logical->physical extent mapping */
535 struct btrfs_mapping_tree mapping_tree;
538 u64 last_trans_committed;
539 u64 last_trans_new_blockgroup;
540 u64 open_ioctl_trans;
541 unsigned long mount_opt;
545 struct btrfs_transaction *running_transaction;
546 wait_queue_head_t transaction_throttle;
547 wait_queue_head_t transaction_wait;
548 wait_queue_head_t async_submit_wait;
550 wait_queue_head_t tree_log_wait;
552 struct btrfs_super_block super_copy;
553 struct btrfs_super_block super_for_commit;
554 struct block_device *__bdev;
555 struct super_block *sb;
556 struct inode *btree_inode;
557 struct backing_dev_info bdi;
558 spinlock_t hash_lock;
559 struct mutex trans_mutex;
560 struct mutex tree_log_mutex;
561 struct mutex transaction_kthread_mutex;
562 struct mutex cleaner_mutex;
563 struct mutex alloc_mutex;
564 struct mutex chunk_mutex;
565 struct mutex drop_mutex;
566 struct mutex volume_mutex;
567 struct list_head trans_list;
568 struct list_head hashers;
569 struct list_head dead_roots;
571 atomic_t nr_async_submits;
572 atomic_t nr_async_bios;
573 atomic_t tree_log_writers;
574 atomic_t tree_log_commit;
575 unsigned long tree_log_batch;
576 u64 tree_log_transid;
579 * this is used by the balancing code to wait for all the pending
582 spinlock_t ordered_extent_lock;
583 struct list_head ordered_extents;
584 struct list_head delalloc_inodes;
587 * there is a pool of worker threads for checksumming during writes
588 * and a pool for checksumming after reads. This is because readers
589 * can run with FS locks held, and the writers may be waiting for
590 * those locks. We don't want ordering in the pending list to cause
591 * deadlocks, and so the two are serviced separately.
593 * A third pool does submit_bio to avoid deadlocking with the other
596 struct btrfs_workers workers;
597 struct btrfs_workers endio_workers;
598 struct btrfs_workers endio_write_workers;
599 struct btrfs_workers submit_workers;
601 * fixup workers take dirty pages that didn't properly go through
602 * the cow mechanism and make them safe to write. It happens
603 * for the sys_munmap function call path
605 struct btrfs_workers fixup_workers;
606 struct task_struct *transaction_kthread;
607 struct task_struct *cleaner_kthread;
608 int thread_pool_size;
610 struct kobject super_kobj;
611 struct completion kobj_unregister;
614 int log_root_recovering;
616 atomic_t throttle_gen;
619 struct list_head dirty_cowonly_roots;
621 struct btrfs_fs_devices *fs_devices;
622 struct list_head space_info;
623 spinlock_t delalloc_lock;
624 spinlock_t new_trans_lock;
630 spinlock_t ref_cache_lock;
631 u64 total_ref_cache_size;
633 u64 avail_data_alloc_bits;
634 u64 avail_metadata_alloc_bits;
635 u64 avail_system_alloc_bits;
636 u64 data_alloc_profile;
637 u64 metadata_alloc_profile;
638 u64 system_alloc_profile;
643 struct btrfs_leaf_ref_tree {
645 struct btrfs_leaf_ref *last;
646 struct list_head list;
651 * in ram representation of the tree. extent_root is used for all allocations
652 * and for the extent tree extent_root root.
654 struct btrfs_dirty_root;
656 struct extent_buffer *node;
658 /* the node lock is held while changing the node pointer */
659 spinlock_t node_lock;
661 struct extent_buffer *commit_root;
662 struct btrfs_leaf_ref_tree *ref_tree;
663 struct btrfs_leaf_ref_tree ref_tree_struct;
664 struct btrfs_dirty_root *dirty_root;
665 struct btrfs_root *log_root;
667 struct btrfs_root_item root_item;
668 struct btrfs_key root_key;
669 struct btrfs_fs_info *fs_info;
671 struct extent_io_tree dirty_log_pages;
673 struct kobject root_kobj;
674 struct completion kobj_unregister;
675 struct mutex objectid_mutex;
676 struct mutex log_mutex;
681 /* data allocations are done in sectorsize units */
684 /* node allocations are done in nodesize units */
687 /* leaf allocations are done in leafsize units */
694 u64 last_inode_alloc;
697 u64 defrag_trans_start;
698 struct btrfs_key defrag_progress;
699 struct btrfs_key defrag_max;
705 /* the dirty list is only used by non-reference counted roots */
706 struct list_head dirty_list;
708 spinlock_t list_lock;
709 struct list_head dead_list;
710 struct list_head orphan_list;
715 * inode items have the data typically returned from stat and store other
716 * info about object characteristics. There is one for every file and dir in
719 #define BTRFS_INODE_ITEM_KEY 1
720 #define BTRFS_INODE_REF_KEY 2
721 #define BTRFS_XATTR_ITEM_KEY 8
722 #define BTRFS_ORPHAN_ITEM_KEY 9
723 /* reserve 2-15 close to the inode for later flexibility */
726 * dir items are the name -> inode pointers in a directory. There is one
727 * for every name in a directory.
729 #define BTRFS_DIR_LOG_ITEM_KEY 14
730 #define BTRFS_DIR_LOG_INDEX_KEY 15
731 #define BTRFS_DIR_ITEM_KEY 16
732 #define BTRFS_DIR_INDEX_KEY 17
734 * extent data is for file data
736 #define BTRFS_EXTENT_DATA_KEY 18
738 * csum items have the checksums for data in the extents
740 #define BTRFS_CSUM_ITEM_KEY 19
743 /* reserve 21-31 for other file/dir stuff */
746 * root items point to tree roots. There are typically in the root
747 * tree used by the super block to find all the other trees
749 #define BTRFS_ROOT_ITEM_KEY 32
751 * extent items are in the extent map tree. These record which blocks
752 * are used, and how many references there are to each block
754 #define BTRFS_EXTENT_ITEM_KEY 33
755 #define BTRFS_EXTENT_REF_KEY 34
758 * block groups give us hints into the extent allocation trees. Which
759 * blocks are free etc etc
761 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
763 #define BTRFS_DEV_EXTENT_KEY 75
764 #define BTRFS_DEV_ITEM_KEY 76
765 #define BTRFS_CHUNK_ITEM_KEY 77
768 * string items are for debugging. They just store a short string of
771 #define BTRFS_STRING_ITEM_KEY 253
773 #define BTRFS_MOUNT_NODATASUM (1 << 0)
774 #define BTRFS_MOUNT_NODATACOW (1 << 1)
775 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
776 #define BTRFS_MOUNT_SSD (1 << 3)
777 #define BTRFS_MOUNT_DEGRADED (1 << 4)
779 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
780 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
781 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
786 #define BTRFS_INODE_NODATASUM (1 << 0)
787 #define BTRFS_INODE_NODATACOW (1 << 1)
788 #define BTRFS_INODE_READONLY (1 << 2)
789 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
791 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
793 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
795 /* some macros to generate set/get funcs for the struct fields. This
796 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
799 #define le8_to_cpu(v) (v)
800 #define cpu_to_le8(v) (v)
803 #define read_eb_member(eb, ptr, type, member, result) ( \
804 read_extent_buffer(eb, (char *)(result), \
805 ((unsigned long)(ptr)) + \
806 offsetof(type, member), \
807 sizeof(((type *)0)->member)))
809 #define write_eb_member(eb, ptr, type, member, result) ( \
810 write_extent_buffer(eb, (char *)(result), \
811 ((unsigned long)(ptr)) + \
812 offsetof(type, member), \
813 sizeof(((type *)0)->member)))
815 #ifndef BTRFS_SETGET_FUNCS
816 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
817 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
818 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
821 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
822 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
824 type *p = kmap_atomic(eb->first_page, KM_USER0); \
825 u##bits res = le##bits##_to_cpu(p->member); \
826 kunmap_atomic(p, KM_USER0); \
829 static inline void btrfs_set_##name(struct extent_buffer *eb, \
832 type *p = kmap_atomic(eb->first_page, KM_USER0); \
833 p->member = cpu_to_le##bits(val); \
834 kunmap_atomic(p, KM_USER0); \
837 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
838 static inline u##bits btrfs_##name(type *s) \
840 return le##bits##_to_cpu(s->member); \
842 static inline void btrfs_set_##name(type *s, u##bits val) \
844 s->member = cpu_to_le##bits(val); \
847 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
848 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
849 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
850 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
851 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
852 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
853 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
854 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
855 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
856 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
858 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
859 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
861 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
863 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
865 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
867 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
869 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
870 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
872 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
874 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
877 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
879 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
882 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
883 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
884 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
885 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
886 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
887 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
888 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
889 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
890 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
891 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
892 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
894 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
896 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
899 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
900 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
901 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
903 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
905 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
907 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
909 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
910 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
912 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
914 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
915 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
917 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
920 unsigned long offset = (unsigned long)c;
921 offset += offsetof(struct btrfs_chunk, stripe);
922 offset += nr * sizeof(struct btrfs_stripe);
923 return (struct btrfs_stripe *)offset;
926 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
928 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
931 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
932 struct btrfs_chunk *c, int nr)
934 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
937 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
938 struct btrfs_chunk *c, int nr,
941 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
944 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
945 struct btrfs_chunk *c, int nr)
947 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
950 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
951 struct btrfs_chunk *c, int nr,
954 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
957 /* struct btrfs_block_group_item */
958 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
960 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
962 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
963 struct btrfs_block_group_item, chunk_objectid, 64);
965 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
966 struct btrfs_block_group_item, chunk_objectid, 64);
967 BTRFS_SETGET_FUNCS(disk_block_group_flags,
968 struct btrfs_block_group_item, flags, 64);
969 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
970 struct btrfs_block_group_item, flags, 64);
972 /* struct btrfs_inode_ref */
973 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
974 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
976 /* struct btrfs_inode_item */
977 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
978 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
979 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
980 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
981 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
982 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
983 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
984 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
985 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
986 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
987 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
988 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
991 static inline struct btrfs_timespec *
992 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
994 unsigned long ptr = (unsigned long)inode_item;
995 ptr += offsetof(struct btrfs_inode_item, atime);
996 return (struct btrfs_timespec *)ptr;
999 static inline struct btrfs_timespec *
1000 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1002 unsigned long ptr = (unsigned long)inode_item;
1003 ptr += offsetof(struct btrfs_inode_item, mtime);
1004 return (struct btrfs_timespec *)ptr;
1007 static inline struct btrfs_timespec *
1008 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1010 unsigned long ptr = (unsigned long)inode_item;
1011 ptr += offsetof(struct btrfs_inode_item, ctime);
1012 return (struct btrfs_timespec *)ptr;
1015 static inline struct btrfs_timespec *
1016 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1018 unsigned long ptr = (unsigned long)inode_item;
1019 ptr += offsetof(struct btrfs_inode_item, otime);
1020 return (struct btrfs_timespec *)ptr;
1023 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1024 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1026 /* struct btrfs_extent_item */
1027 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1029 /* struct btrfs_dev_extent */
1030 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1032 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1033 chunk_objectid, 64);
1034 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1036 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1038 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1040 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1041 return (u8 *)((unsigned long)dev + ptr);
1044 /* struct btrfs_extent_ref */
1045 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1046 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1047 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1048 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1050 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1051 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1053 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1055 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1057 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1060 /* struct btrfs_node */
1061 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1062 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1064 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1067 ptr = offsetof(struct btrfs_node, ptrs) +
1068 sizeof(struct btrfs_key_ptr) * nr;
1069 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1072 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1076 ptr = offsetof(struct btrfs_node, ptrs) +
1077 sizeof(struct btrfs_key_ptr) * nr;
1078 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1081 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1084 ptr = offsetof(struct btrfs_node, ptrs) +
1085 sizeof(struct btrfs_key_ptr) * nr;
1086 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1089 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1093 ptr = offsetof(struct btrfs_node, ptrs) +
1094 sizeof(struct btrfs_key_ptr) * nr;
1095 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1098 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1100 return offsetof(struct btrfs_node, ptrs) +
1101 sizeof(struct btrfs_key_ptr) * nr;
1104 void btrfs_node_key(struct extent_buffer *eb,
1105 struct btrfs_disk_key *disk_key, int nr);
1107 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1108 struct btrfs_disk_key *disk_key, int nr)
1111 ptr = btrfs_node_key_ptr_offset(nr);
1112 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1113 struct btrfs_key_ptr, key, disk_key);
1116 /* struct btrfs_item */
1117 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1118 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1120 static inline unsigned long btrfs_item_nr_offset(int nr)
1122 return offsetof(struct btrfs_leaf, items) +
1123 sizeof(struct btrfs_item) * nr;
1126 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1129 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1132 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1133 struct btrfs_item *item)
1135 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1138 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1140 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1143 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1145 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1148 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1150 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1153 static inline void btrfs_item_key(struct extent_buffer *eb,
1154 struct btrfs_disk_key *disk_key, int nr)
1156 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1157 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1160 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1161 struct btrfs_disk_key *disk_key, int nr)
1163 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1164 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1167 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1169 /* struct btrfs_dir_item */
1170 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1171 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1172 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1173 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1175 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1176 struct btrfs_dir_item *item,
1177 struct btrfs_disk_key *key)
1179 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1182 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1183 struct btrfs_dir_item *item,
1184 struct btrfs_disk_key *key)
1186 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1189 /* struct btrfs_disk_key */
1190 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1192 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1193 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1195 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1196 struct btrfs_disk_key *disk)
1198 cpu->offset = le64_to_cpu(disk->offset);
1199 cpu->type = disk->type;
1200 cpu->objectid = le64_to_cpu(disk->objectid);
1203 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1204 struct btrfs_key *cpu)
1206 disk->offset = cpu_to_le64(cpu->offset);
1207 disk->type = cpu->type;
1208 disk->objectid = cpu_to_le64(cpu->objectid);
1211 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1212 struct btrfs_key *key, int nr)
1214 struct btrfs_disk_key disk_key;
1215 btrfs_node_key(eb, &disk_key, nr);
1216 btrfs_disk_key_to_cpu(key, &disk_key);
1219 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1220 struct btrfs_key *key, int nr)
1222 struct btrfs_disk_key disk_key;
1223 btrfs_item_key(eb, &disk_key, nr);
1224 btrfs_disk_key_to_cpu(key, &disk_key);
1227 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1228 struct btrfs_dir_item *item,
1229 struct btrfs_key *key)
1231 struct btrfs_disk_key disk_key;
1232 btrfs_dir_item_key(eb, item, &disk_key);
1233 btrfs_disk_key_to_cpu(key, &disk_key);
1237 static inline u8 btrfs_key_type(struct btrfs_key *key)
1242 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1247 /* struct btrfs_header */
1248 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1249 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1251 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1252 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1253 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1254 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1256 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1258 return (btrfs_header_flags(eb) & flag) == flag;
1261 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1263 u64 flags = btrfs_header_flags(eb);
1264 btrfs_set_header_flags(eb, flags | flag);
1265 return (flags & flag) == flag;
1268 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1270 u64 flags = btrfs_header_flags(eb);
1271 btrfs_set_header_flags(eb, flags & ~flag);
1272 return (flags & flag) == flag;
1275 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1277 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1281 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1283 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1287 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1289 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1293 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1295 unsigned long ptr = offsetof(struct btrfs_header, csum);
1299 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1304 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1309 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1314 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1316 return (btrfs_header_level(eb) == 0);
1319 /* struct btrfs_root_item */
1320 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1321 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1322 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1324 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1325 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1326 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1327 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1328 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1329 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1330 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1332 /* struct btrfs_super_block */
1333 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1334 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1335 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1337 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1338 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1339 struct btrfs_super_block, sys_chunk_array_size, 32);
1340 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1342 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1344 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1345 chunk_root_level, 8);
1346 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1348 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1350 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1352 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1354 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1356 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1358 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1360 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1362 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1363 root_dir_objectid, 64);
1364 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1367 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1369 return offsetof(struct btrfs_leaf, items);
1372 /* struct btrfs_file_extent_item */
1373 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1375 static inline unsigned long btrfs_file_extent_inline_start(struct
1376 btrfs_file_extent_item *e)
1378 unsigned long offset = (unsigned long)e;
1379 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1383 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1385 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1388 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1389 struct btrfs_item *e)
1391 unsigned long offset;
1392 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1393 return btrfs_item_size(eb, e) - offset;
1396 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1398 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1400 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1401 disk_num_bytes, 64);
1402 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1404 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1407 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1409 return sb->s_fs_info;
1412 static inline int btrfs_set_root_name(struct btrfs_root *root,
1413 const char *name, int len)
1415 /* if we already have a name just free it */
1419 root->name = kmalloc(len+1, GFP_KERNEL);
1423 memcpy(root->name, name, len);
1424 root->name[len] ='\0';
1429 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1431 return root->leafsize;
1432 return root->nodesize;
1435 /* helper function to cast into the data area of the leaf. */
1436 #define btrfs_item_ptr(leaf, slot, type) \
1437 ((type *)(btrfs_leaf_data(leaf) + \
1438 btrfs_item_offset_nr(leaf, slot)))
1440 #define btrfs_item_ptr_offset(leaf, slot) \
1441 ((unsigned long)(btrfs_leaf_data(leaf) + \
1442 btrfs_item_offset_nr(leaf, slot)))
1444 static inline struct dentry *fdentry(struct file *file) {
1445 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1446 return file->f_dentry;
1448 return file->f_path.dentry;
1453 int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path,
1454 u64 start, u64 len);
1455 int btrfs_update_pinned_extents(struct btrfs_root *root,
1456 u64 bytenr, u64 num, int pin);
1457 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1458 struct btrfs_root *root, struct extent_buffer *leaf);
1459 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1460 struct btrfs_root *root,
1461 struct btrfs_key *key, u64 bytenr);
1462 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1463 struct btrfs_root *root);
1464 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1465 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1466 btrfs_fs_info *info,
1468 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1469 struct btrfs_block_group_cache
1470 *hint, u64 search_start,
1471 int data, int owner);
1472 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root,
1481 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1482 struct btrfs_root *root,
1483 u64 bytenr, u32 blocksize);
1484 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1485 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1486 struct btrfs_root *root,
1487 struct btrfs_path *path, u64 bytenr,
1488 u64 root_objectid, u64 ref_generation,
1489 u64 owner, u64 owner_offset);
1490 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1491 struct btrfs_root *root,
1492 u64 num_bytes, u64 min_bytes,
1493 u64 root_objectid, u64 ref_generation,
1494 u64 owner, u64 owner_offset,
1495 u64 empty_size, u64 hint_byte,
1496 u64 search_end, struct btrfs_key *ins, u64 data);
1497 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1498 struct btrfs_root *root,
1499 u64 root_objectid, u64 ref_generation,
1500 u64 owner, u64 owner_offset,
1501 struct btrfs_key *ins);
1502 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1503 struct btrfs_root *root,
1504 u64 root_objectid, u64 ref_generation,
1505 u64 owner, u64 owner_offset,
1506 struct btrfs_key *ins);
1507 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1508 struct btrfs_root *root,
1509 u64 num_bytes, u64 min_alloc_size,
1510 u64 empty_size, u64 hint_byte,
1511 u64 search_end, struct btrfs_key *ins,
1513 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1514 struct extent_buffer *buf, int cache_ref);
1515 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1516 *root, u64 bytenr, u64 num_bytes,
1517 u64 root_objectid, u64 ref_generation,
1518 u64 owner_objectid, u64 owner_offset, int pin);
1519 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1520 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1521 struct btrfs_root *root,
1522 struct extent_io_tree *unpin);
1523 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1524 struct btrfs_root *root,
1525 u64 bytenr, u64 num_bytes,
1526 u64 root_objectid, u64 ref_generation,
1527 u64 owner, u64 owner_offset);
1528 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1529 struct btrfs_root *root);
1530 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1531 int btrfs_read_block_groups(struct btrfs_root *root);
1532 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1533 struct btrfs_root *root, u64 bytes_used,
1534 u64 type, u64 chunk_objectid, u64 chunk_offset,
1537 int btrfs_previous_item(struct btrfs_root *root,
1538 struct btrfs_path *path, u64 min_objectid,
1541 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1542 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1543 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1544 struct btrfs_key *key, int lowest_level,
1545 int cache_only, u64 min_trans);
1546 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1547 struct btrfs_key *max_key,
1548 struct btrfs_path *path, int cache_only,
1550 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1551 struct btrfs_root *root, struct extent_buffer *buf,
1552 struct extent_buffer *parent, int parent_slot,
1553 struct extent_buffer **cow_ret, u64 prealloc_dest);
1554 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1555 struct btrfs_root *root,
1556 struct extent_buffer *buf,
1557 struct extent_buffer **cow_ret, u64 new_root_objectid);
1558 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1559 *root, struct btrfs_path *path, u32 data_size);
1560 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1561 struct btrfs_root *root,
1562 struct btrfs_path *path,
1563 u32 new_size, int from_end);
1564 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1565 *root, struct btrfs_key *key, struct btrfs_path *p, int
1567 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1568 struct btrfs_root *root, struct extent_buffer *parent,
1569 int start_slot, int cache_only, u64 *last_ret,
1570 struct btrfs_key *progress);
1571 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1572 struct btrfs_path *btrfs_alloc_path(void);
1573 void btrfs_free_path(struct btrfs_path *p);
1574 void btrfs_init_path(struct btrfs_path *p);
1575 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1576 struct btrfs_path *path, int slot, int nr);
1578 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root,
1580 struct btrfs_path *path)
1582 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1585 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1586 *root, struct btrfs_key *key, void *data, u32 data_size);
1587 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1588 struct btrfs_root *root,
1589 struct btrfs_path *path,
1590 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1592 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1593 struct btrfs_root *root,
1594 struct btrfs_path *path,
1595 struct btrfs_key *key,
1598 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1601 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1602 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1603 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1604 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1607 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1608 struct btrfs_key *key);
1609 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1610 *root, struct btrfs_key *key, struct btrfs_root_item
1612 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1613 *root, struct btrfs_key *key, struct btrfs_root_item
1615 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1616 btrfs_root_item *item, struct btrfs_key *key);
1617 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1618 u64 *found_objectid);
1619 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1620 struct btrfs_root *latest_root);
1622 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1623 *root, const char *name, int name_len, u64 dir,
1624 struct btrfs_key *location, u8 type, u64 index);
1625 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1626 struct btrfs_root *root,
1627 struct btrfs_path *path, u64 dir,
1628 const char *name, int name_len,
1630 struct btrfs_dir_item *
1631 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1632 struct btrfs_root *root,
1633 struct btrfs_path *path, u64 dir,
1634 u64 objectid, const char *name, int name_len,
1636 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1637 struct btrfs_path *path,
1638 const char *name, int name_len);
1639 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1640 struct btrfs_root *root,
1641 struct btrfs_path *path,
1642 struct btrfs_dir_item *di);
1643 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1644 struct btrfs_root *root, const char *name,
1645 u16 name_len, const void *data, u16 data_len,
1647 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1648 struct btrfs_root *root,
1649 struct btrfs_path *path, u64 dir,
1650 const char *name, u16 name_len,
1654 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1655 struct btrfs_root *root, u64 offset);
1656 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1657 struct btrfs_root *root, u64 offset);
1660 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1661 struct btrfs_root *fs_root,
1662 u64 dirid, u64 *objectid);
1663 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1666 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1667 struct btrfs_root *root,
1668 const char *name, int name_len,
1669 u64 inode_objectid, u64 ref_objectid, u64 index);
1670 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1671 struct btrfs_root *root,
1672 const char *name, int name_len,
1673 u64 inode_objectid, u64 ref_objectid, u64 *index);
1674 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1675 struct btrfs_root *root,
1676 struct btrfs_path *path, u64 objectid);
1677 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1678 *root, struct btrfs_path *path,
1679 struct btrfs_key *location, int mod);
1682 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1684 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1685 struct btrfs_root *root,
1686 u64 objectid, u64 pos, u64 disk_offset,
1688 u64 num_bytes, u64 offset);
1689 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1690 struct btrfs_root *root,
1691 struct btrfs_path *path, u64 objectid,
1692 u64 bytenr, int mod);
1693 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1694 struct btrfs_root *root, struct inode *inode,
1695 struct btrfs_ordered_sum *sums);
1696 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1698 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1699 struct btrfs_root *root,
1700 struct btrfs_path *path,
1701 u64 objectid, u64 offset,
1703 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1704 struct btrfs_root *root, struct btrfs_path *path,
1708 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1709 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1710 #define ClearPageChecked ClearPageFsMisc
1711 #define SetPageChecked SetPageFsMisc
1712 #define PageChecked PageFsMisc
1715 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1716 struct btrfs_root *root,
1717 struct inode *dir, struct inode *inode,
1718 const char *name, int name_len);
1719 int btrfs_add_link(struct btrfs_trans_handle *trans,
1720 struct inode *parent_inode, struct inode *inode,
1721 const char *name, int name_len, int add_backref, u64 index);
1722 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1723 struct btrfs_root *root,
1724 struct inode *inode, u64 new_size,
1727 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1728 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1729 int btrfs_writepages(struct address_space *mapping,
1730 struct writeback_control *wbc);
1731 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1732 struct btrfs_trans_handle *trans, u64 new_dirid,
1733 struct btrfs_block_group_cache *block_group);
1735 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1738 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1739 size_t size, struct bio *bio);
1741 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1744 if (dec <= inode->i_blocks)
1745 inode->i_blocks -= dec;
1747 inode->i_blocks = 0;
1750 unsigned long btrfs_force_ra(struct address_space *mapping,
1751 struct file_ra_state *ra, struct file *file,
1752 pgoff_t offset, pgoff_t last_index);
1753 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1755 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1756 int btrfs_readpage(struct file *file, struct page *page);
1757 void btrfs_delete_inode(struct inode *inode);
1758 void btrfs_put_inode(struct inode *inode);
1759 void btrfs_read_locked_inode(struct inode *inode);
1760 int btrfs_write_inode(struct inode *inode, int wait);
1761 void btrfs_dirty_inode(struct inode *inode);
1762 struct inode *btrfs_alloc_inode(struct super_block *sb);
1763 void btrfs_destroy_inode(struct inode *inode);
1764 int btrfs_init_cachep(void);
1765 void btrfs_destroy_cachep(void);
1766 long btrfs_ioctl_trans_end(struct file *file);
1767 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1768 struct btrfs_root *root);
1769 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1770 struct btrfs_root *root, int *is_new);
1771 int btrfs_commit_write(struct file *file, struct page *page,
1772 unsigned from, unsigned to);
1773 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1774 size_t page_offset, u64 start, u64 end,
1776 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1777 struct btrfs_root *root,
1778 struct inode *inode);
1781 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1784 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1785 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1786 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1787 extern struct file_operations btrfs_file_operations;
1788 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1789 struct btrfs_root *root, struct inode *inode,
1790 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1791 int btrfs_release_file(struct inode *inode, struct file *file);
1794 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1795 struct btrfs_root *root, int cache_only);
1798 int btrfs_init_sysfs(void);
1799 void btrfs_exit_sysfs(void);
1800 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1801 int btrfs_sysfs_add_root(struct btrfs_root *root);
1802 void btrfs_sysfs_del_root(struct btrfs_root *root);
1803 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1806 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1809 u64 btrfs_parse_size(char *str);
1810 int btrfs_parse_options(struct btrfs_root *root, char *options);
1811 int btrfs_sync_fs(struct super_block *sb, int wait);
1814 int btrfs_check_acl(struct inode *inode, int mask);
1815 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1816 int btrfs_acl_chmod(struct inode *inode);