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 higher than this.
87 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
88 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
92 * the device items go into the chunk tree. The key is in the form
93 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
95 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
98 * we can actually store much bigger names, but lets not confuse the rest
101 #define BTRFS_NAME_LEN 255
103 /* 32 bytes in various csum fields */
104 #define BTRFS_CSUM_SIZE 32
105 /* four bytes for CRC32 */
106 #define BTRFS_CRC32_SIZE 4
107 #define BTRFS_EMPTY_DIR_SIZE 0
109 #define BTRFS_FT_UNKNOWN 0
110 #define BTRFS_FT_REG_FILE 1
111 #define BTRFS_FT_DIR 2
112 #define BTRFS_FT_CHRDEV 3
113 #define BTRFS_FT_BLKDEV 4
114 #define BTRFS_FT_FIFO 5
115 #define BTRFS_FT_SOCK 6
116 #define BTRFS_FT_SYMLINK 7
117 #define BTRFS_FT_XATTR 8
118 #define BTRFS_FT_MAX 9
121 * the key defines the order in the tree, and so it also defines (optimal)
122 * block layout. objectid corresonds to the inode number. The flags
123 * tells us things about the object, and is a kind of stream selector.
124 * so for a given inode, keys with flags of 1 might refer to the inode
125 * data, flags of 2 may point to file data in the btree and flags == 3
126 * may point to extents.
128 * offset is the starting byte offset for this key in the stream.
130 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
131 * in cpu native order. Otherwise they are identical and their sizes
132 * should be the same (ie both packed)
134 struct btrfs_disk_key {
138 } __attribute__ ((__packed__));
144 } __attribute__ ((__packed__));
146 struct btrfs_mapping_tree {
147 struct extent_map_tree map_tree;
150 #define BTRFS_UUID_SIZE 16
151 struct btrfs_dev_item {
152 /* the internal btrfs device id */
155 /* size of the device */
161 /* optimal io alignment for this device */
164 /* optimal io width for this device */
167 /* minimal io size for this device */
170 /* type and info about this device */
173 /* grouping information for allocation decisions */
176 /* seek speed 0-100 where 100 is fastest */
179 /* bandwidth 0-100 where 100 is fastest */
182 /* btrfs generated uuid for this device */
183 u8 uuid[BTRFS_UUID_SIZE];
184 } __attribute__ ((__packed__));
186 struct btrfs_stripe {
189 u8 dev_uuid[BTRFS_UUID_SIZE];
190 } __attribute__ ((__packed__));
193 /* size of this chunk in bytes */
196 /* objectid of the root referencing this chunk */
202 /* optimal io alignment for this chunk */
205 /* optimal io width for this chunk */
208 /* minimal io size for this chunk */
211 /* 2^16 stripes is quite a lot, a second limit is the size of a single
216 /* sub stripes only matter for raid10 */
218 struct btrfs_stripe stripe;
219 /* additional stripes go here */
220 } __attribute__ ((__packed__));
222 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
224 BUG_ON(num_stripes == 0);
225 return sizeof(struct btrfs_chunk) +
226 sizeof(struct btrfs_stripe) * (num_stripes - 1);
229 #define BTRFS_FSID_SIZE 16
230 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
233 * every tree block (leaf or node) starts with this header.
235 struct btrfs_header {
236 /* these first four must match the super block */
237 u8 csum[BTRFS_CSUM_SIZE];
238 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
239 __le64 bytenr; /* which block this node is supposed to live in */
242 /* allowed to be different from the super from here on down */
243 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
248 } __attribute__ ((__packed__));
250 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
251 sizeof(struct btrfs_header)) / \
252 sizeof(struct btrfs_key_ptr))
253 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
254 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
255 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
256 sizeof(struct btrfs_item) - \
257 sizeof(struct btrfs_file_extent_item))
261 * this is a very generous portion of the super block, giving us
262 * room to translate 14 chunks with 3 stripes each.
264 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
265 #define BTRFS_LABEL_SIZE 256
268 * the super block basically lists the main trees of the FS
269 * it currently lacks any block count etc etc
271 struct btrfs_super_block {
272 u8 csum[BTRFS_CSUM_SIZE];
273 /* the first 4 fields must match struct btrfs_header */
274 u8 fsid[16]; /* FS specific uuid */
275 __le64 bytenr; /* this block number */
278 /* allowed to be different from the btrfs_header from here own down */
286 __le64 root_dir_objectid;
292 __le32 sys_chunk_array_size;
296 struct btrfs_dev_item dev_item;
297 char label[BTRFS_LABEL_SIZE];
298 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
299 } __attribute__ ((__packed__));
302 * A leaf is full of items. offset and size tell us where to find
303 * the item in the leaf (relative to the start of the data area)
306 struct btrfs_disk_key key;
309 } __attribute__ ((__packed__));
312 * leaves have an item area and a data area:
313 * [item0, item1....itemN] [free space] [dataN...data1, data0]
315 * The data is separate from the items to get the keys closer together
319 struct btrfs_header header;
320 struct btrfs_item items[];
321 } __attribute__ ((__packed__));
324 * all non-leaf blocks are nodes, they hold only keys and pointers to
327 struct btrfs_key_ptr {
328 struct btrfs_disk_key key;
331 } __attribute__ ((__packed__));
334 struct btrfs_header header;
335 struct btrfs_key_ptr ptrs[];
336 } __attribute__ ((__packed__));
339 * btrfs_paths remember the path taken from the root down to the leaf.
340 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
341 * to any other levels that are present.
343 * The slots array records the index of the item or block pointer
344 * used while walking the tree.
347 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
348 int slots[BTRFS_MAX_LEVEL];
349 /* if there is real range locking, this locks field will change */
350 int locks[BTRFS_MAX_LEVEL];
352 /* keep some upper locks as we walk down */
359 * items in the extent btree are used to record the objectid of the
360 * owner of the block and the number of references
362 struct btrfs_extent_item {
364 } __attribute__ ((__packed__));
366 struct btrfs_extent_ref {
371 } __attribute__ ((__packed__));
373 /* dev extents record free space on individual devices. The owner
374 * field points back to the chunk allocation mapping tree that allocated
375 * the extent. The chunk tree uuid field is a way to double check the owner
377 struct btrfs_dev_extent {
379 __le64 chunk_objectid;
382 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
383 } __attribute__ ((__packed__));
385 struct btrfs_inode_ref {
389 } __attribute__ ((__packed__));
391 struct btrfs_timespec {
394 } __attribute__ ((__packed__));
397 * there is no padding here on purpose. If you want to extent the inode,
398 * make a new item type
400 struct btrfs_inode_item {
401 /* nfs style generation number */
403 /* transid that last touched this inode */
415 struct btrfs_timespec atime;
416 struct btrfs_timespec ctime;
417 struct btrfs_timespec mtime;
418 struct btrfs_timespec otime;
419 } __attribute__ ((__packed__));
421 struct btrfs_dir_log_item {
423 } __attribute__ ((__packed__));
425 struct btrfs_dir_item {
426 struct btrfs_disk_key location;
431 } __attribute__ ((__packed__));
433 struct btrfs_root_item {
434 struct btrfs_inode_item inode;
441 struct btrfs_disk_key drop_progress;
444 } __attribute__ ((__packed__));
446 #define BTRFS_FILE_EXTENT_REG 0
447 #define BTRFS_FILE_EXTENT_INLINE 1
449 struct btrfs_file_extent_item {
453 * disk space consumed by the extent, checksum blocks are included
457 __le64 disk_num_bytes;
459 * the logical offset in file blocks (no csums)
460 * this extent record is for. This allows a file extent to point
461 * into the middle of an existing extent on disk, sharing it
462 * between two snapshots (useful if some bytes in the middle of the
463 * extent have changed
467 * the logical number of file blocks (no csums included)
470 } __attribute__ ((__packed__));
472 struct btrfs_csum_item {
474 } __attribute__ ((__packed__));
476 /* different types of block groups (and chunks) */
477 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
478 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
479 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
480 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
481 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
482 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
483 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
486 struct btrfs_block_group_item {
488 __le64 chunk_objectid;
490 } __attribute__ ((__packed__));
492 struct btrfs_space_info {
499 struct list_head list;
502 struct btrfs_block_group_cache {
503 struct btrfs_key key;
504 struct btrfs_block_group_item item;
505 struct btrfs_space_info *space_info;
514 struct btrfs_fs_devices;
515 struct btrfs_fs_info {
516 u8 fsid[BTRFS_FSID_SIZE];
517 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
518 struct btrfs_root *extent_root;
519 struct btrfs_root *tree_root;
520 struct btrfs_root *chunk_root;
521 struct btrfs_root *dev_root;
523 /* the log root tree is a directory of all the other log roots */
524 struct btrfs_root *log_root_tree;
525 struct radix_tree_root fs_roots_radix;
527 struct extent_io_tree free_space_cache;
528 struct extent_io_tree block_group_cache;
529 struct extent_io_tree pinned_extents;
530 struct extent_io_tree pending_del;
531 struct extent_io_tree extent_ins;
533 /* logical->physical extent mapping */
534 struct btrfs_mapping_tree mapping_tree;
537 u64 last_trans_committed;
538 u64 last_trans_new_blockgroup;
539 u64 open_ioctl_trans;
540 unsigned long mount_opt;
544 struct btrfs_transaction *running_transaction;
545 wait_queue_head_t transaction_throttle;
546 wait_queue_head_t transaction_wait;
547 wait_queue_head_t async_submit_wait;
549 wait_queue_head_t tree_log_wait;
551 struct btrfs_super_block super_copy;
552 struct btrfs_super_block super_for_commit;
553 struct block_device *__bdev;
554 struct super_block *sb;
555 struct inode *btree_inode;
556 struct backing_dev_info bdi;
557 spinlock_t hash_lock;
558 struct mutex trans_mutex;
559 struct mutex tree_log_mutex;
560 struct mutex transaction_kthread_mutex;
561 struct mutex cleaner_mutex;
562 struct mutex alloc_mutex;
563 struct mutex chunk_mutex;
564 struct mutex drop_mutex;
565 struct mutex volume_mutex;
566 struct list_head trans_list;
567 struct list_head hashers;
568 struct list_head dead_roots;
570 atomic_t nr_async_submits;
571 atomic_t nr_async_bios;
572 atomic_t tree_log_writers;
573 atomic_t tree_log_commit;
574 unsigned long tree_log_batch;
575 u64 tree_log_transid;
578 * this is used by the balancing code to wait for all the pending
581 spinlock_t ordered_extent_lock;
582 struct list_head ordered_extents;
583 struct list_head delalloc_inodes;
586 * there is a pool of worker threads for checksumming during writes
587 * and a pool for checksumming after reads. This is because readers
588 * can run with FS locks held, and the writers may be waiting for
589 * those locks. We don't want ordering in the pending list to cause
590 * deadlocks, and so the two are serviced separately.
592 * A third pool does submit_bio to avoid deadlocking with the other
595 struct btrfs_workers workers;
596 struct btrfs_workers endio_workers;
597 struct btrfs_workers endio_write_workers;
598 struct btrfs_workers submit_workers;
600 * fixup workers take dirty pages that didn't properly go through
601 * the cow mechanism and make them safe to write. It happens
602 * for the sys_munmap function call path
604 struct btrfs_workers fixup_workers;
605 struct task_struct *transaction_kthread;
606 struct task_struct *cleaner_kthread;
607 int thread_pool_size;
609 struct kobject super_kobj;
610 struct completion kobj_unregister;
613 int log_root_recovering;
615 atomic_t throttle_gen;
618 struct list_head dirty_cowonly_roots;
620 struct btrfs_fs_devices *fs_devices;
621 struct list_head space_info;
622 spinlock_t delalloc_lock;
623 spinlock_t new_trans_lock;
629 spinlock_t ref_cache_lock;
630 u64 total_ref_cache_size;
632 u64 avail_data_alloc_bits;
633 u64 avail_metadata_alloc_bits;
634 u64 avail_system_alloc_bits;
635 u64 data_alloc_profile;
636 u64 metadata_alloc_profile;
637 u64 system_alloc_profile;
642 struct btrfs_leaf_ref_tree {
644 struct btrfs_leaf_ref *last;
645 struct list_head list;
650 * in ram representation of the tree. extent_root is used for all allocations
651 * and for the extent tree extent_root root.
653 struct btrfs_dirty_root;
655 struct extent_buffer *node;
657 /* the node lock is held while changing the node pointer */
658 spinlock_t node_lock;
660 struct extent_buffer *commit_root;
661 struct btrfs_leaf_ref_tree *ref_tree;
662 struct btrfs_leaf_ref_tree ref_tree_struct;
663 struct btrfs_dirty_root *dirty_root;
664 struct btrfs_root *log_root;
666 struct btrfs_root_item root_item;
667 struct btrfs_key root_key;
668 struct btrfs_fs_info *fs_info;
670 struct kobject root_kobj;
671 struct completion kobj_unregister;
672 struct mutex objectid_mutex;
673 struct mutex log_mutex;
678 /* data allocations are done in sectorsize units */
681 /* node allocations are done in nodesize units */
684 /* leaf allocations are done in leafsize units */
691 u64 last_inode_alloc;
694 u64 defrag_trans_start;
695 struct btrfs_key defrag_progress;
696 struct btrfs_key defrag_max;
702 /* the dirty list is only used by non-reference counted roots */
703 struct list_head dirty_list;
705 spinlock_t list_lock;
706 struct list_head dead_list;
707 struct list_head orphan_list;
712 * inode items have the data typically returned from stat and store other
713 * info about object characteristics. There is one for every file and dir in
716 #define BTRFS_INODE_ITEM_KEY 1
717 #define BTRFS_INODE_REF_KEY 2
718 #define BTRFS_XATTR_ITEM_KEY 8
719 #define BTRFS_ORPHAN_ITEM_KEY 9
720 /* reserve 2-15 close to the inode for later flexibility */
723 * dir items are the name -> inode pointers in a directory. There is one
724 * for every name in a directory.
726 #define BTRFS_DIR_LOG_ITEM_KEY 14
727 #define BTRFS_DIR_LOG_INDEX_KEY 15
728 #define BTRFS_DIR_ITEM_KEY 16
729 #define BTRFS_DIR_INDEX_KEY 17
731 * extent data is for file data
733 #define BTRFS_EXTENT_DATA_KEY 18
735 * csum items have the checksums for data in the extents
737 #define BTRFS_CSUM_ITEM_KEY 19
740 /* reserve 21-31 for other file/dir stuff */
743 * root items point to tree roots. There are typically in the root
744 * tree used by the super block to find all the other trees
746 #define BTRFS_ROOT_ITEM_KEY 32
748 * extent items are in the extent map tree. These record which blocks
749 * are used, and how many references there are to each block
751 #define BTRFS_EXTENT_ITEM_KEY 33
752 #define BTRFS_EXTENT_REF_KEY 34
755 * block groups give us hints into the extent allocation trees. Which
756 * blocks are free etc etc
758 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
760 #define BTRFS_DEV_EXTENT_KEY 75
761 #define BTRFS_DEV_ITEM_KEY 76
762 #define BTRFS_CHUNK_ITEM_KEY 77
765 * string items are for debugging. They just store a short string of
768 #define BTRFS_STRING_ITEM_KEY 253
770 #define BTRFS_MOUNT_NODATASUM (1 << 0)
771 #define BTRFS_MOUNT_NODATACOW (1 << 1)
772 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
773 #define BTRFS_MOUNT_SSD (1 << 3)
774 #define BTRFS_MOUNT_DEGRADED (1 << 4)
776 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
777 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
778 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
783 #define BTRFS_INODE_NODATASUM (1 << 0)
784 #define BTRFS_INODE_NODATACOW (1 << 1)
785 #define BTRFS_INODE_READONLY (1 << 2)
786 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
788 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
790 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
792 /* some macros to generate set/get funcs for the struct fields. This
793 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
796 #define le8_to_cpu(v) (v)
797 #define cpu_to_le8(v) (v)
800 #define read_eb_member(eb, ptr, type, member, result) ( \
801 read_extent_buffer(eb, (char *)(result), \
802 ((unsigned long)(ptr)) + \
803 offsetof(type, member), \
804 sizeof(((type *)0)->member)))
806 #define write_eb_member(eb, ptr, type, member, result) ( \
807 write_extent_buffer(eb, (char *)(result), \
808 ((unsigned long)(ptr)) + \
809 offsetof(type, member), \
810 sizeof(((type *)0)->member)))
812 #ifndef BTRFS_SETGET_FUNCS
813 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
814 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
815 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
818 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
819 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
821 type *p = kmap_atomic(eb->first_page, KM_USER0); \
822 u##bits res = le##bits##_to_cpu(p->member); \
823 kunmap_atomic(p, KM_USER0); \
826 static inline void btrfs_set_##name(struct extent_buffer *eb, \
829 type *p = kmap_atomic(eb->first_page, KM_USER0); \
830 p->member = cpu_to_le##bits(val); \
831 kunmap_atomic(p, KM_USER0); \
834 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
835 static inline u##bits btrfs_##name(type *s) \
837 return le##bits##_to_cpu(s->member); \
839 static inline void btrfs_set_##name(type *s, u##bits val) \
841 s->member = cpu_to_le##bits(val); \
844 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
845 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
846 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
847 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
848 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
849 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
850 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
851 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
852 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
853 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
855 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
856 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
858 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
860 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
862 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
864 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
866 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
867 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
869 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
871 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
874 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
876 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
879 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
880 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
881 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
882 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
883 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
884 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
885 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
886 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
887 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
888 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
889 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
891 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
893 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
896 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
897 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
898 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
900 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
902 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
904 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
906 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
907 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
909 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
911 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
912 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
914 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
917 unsigned long offset = (unsigned long)c;
918 offset += offsetof(struct btrfs_chunk, stripe);
919 offset += nr * sizeof(struct btrfs_stripe);
920 return (struct btrfs_stripe *)offset;
923 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
925 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
928 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
929 struct btrfs_chunk *c, int nr)
931 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
934 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
935 struct btrfs_chunk *c, int nr,
938 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
941 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
942 struct btrfs_chunk *c, int nr)
944 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
947 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
948 struct btrfs_chunk *c, int nr,
951 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
954 /* struct btrfs_block_group_item */
955 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
957 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
959 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
960 struct btrfs_block_group_item, chunk_objectid, 64);
962 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
963 struct btrfs_block_group_item, chunk_objectid, 64);
964 BTRFS_SETGET_FUNCS(disk_block_group_flags,
965 struct btrfs_block_group_item, flags, 64);
966 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
967 struct btrfs_block_group_item, flags, 64);
969 /* struct btrfs_inode_ref */
970 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
971 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
973 /* struct btrfs_inode_item */
974 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
975 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
976 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
977 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
978 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
979 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
980 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
981 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
982 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
983 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
984 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
985 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
988 static inline struct btrfs_timespec *
989 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
991 unsigned long ptr = (unsigned long)inode_item;
992 ptr += offsetof(struct btrfs_inode_item, atime);
993 return (struct btrfs_timespec *)ptr;
996 static inline struct btrfs_timespec *
997 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
999 unsigned long ptr = (unsigned long)inode_item;
1000 ptr += offsetof(struct btrfs_inode_item, mtime);
1001 return (struct btrfs_timespec *)ptr;
1004 static inline struct btrfs_timespec *
1005 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1007 unsigned long ptr = (unsigned long)inode_item;
1008 ptr += offsetof(struct btrfs_inode_item, ctime);
1009 return (struct btrfs_timespec *)ptr;
1012 static inline struct btrfs_timespec *
1013 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1015 unsigned long ptr = (unsigned long)inode_item;
1016 ptr += offsetof(struct btrfs_inode_item, otime);
1017 return (struct btrfs_timespec *)ptr;
1020 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1021 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1023 /* struct btrfs_extent_item */
1024 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
1026 /* struct btrfs_dev_extent */
1027 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1029 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1030 chunk_objectid, 64);
1031 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1033 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1035 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1037 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1038 return (u8 *)((unsigned long)dev + ptr);
1041 /* struct btrfs_extent_ref */
1042 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
1043 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
1044 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
1045 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
1047 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
1048 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
1050 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
1052 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
1054 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
1057 /* struct btrfs_node */
1058 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1059 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1061 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1064 ptr = offsetof(struct btrfs_node, ptrs) +
1065 sizeof(struct btrfs_key_ptr) * nr;
1066 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1069 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1073 ptr = offsetof(struct btrfs_node, ptrs) +
1074 sizeof(struct btrfs_key_ptr) * nr;
1075 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1078 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1081 ptr = offsetof(struct btrfs_node, ptrs) +
1082 sizeof(struct btrfs_key_ptr) * nr;
1083 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1086 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1090 ptr = offsetof(struct btrfs_node, ptrs) +
1091 sizeof(struct btrfs_key_ptr) * nr;
1092 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1095 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1097 return offsetof(struct btrfs_node, ptrs) +
1098 sizeof(struct btrfs_key_ptr) * nr;
1101 void btrfs_node_key(struct extent_buffer *eb,
1102 struct btrfs_disk_key *disk_key, int nr);
1104 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1105 struct btrfs_disk_key *disk_key, int nr)
1108 ptr = btrfs_node_key_ptr_offset(nr);
1109 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1110 struct btrfs_key_ptr, key, disk_key);
1113 /* struct btrfs_item */
1114 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1115 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1117 static inline unsigned long btrfs_item_nr_offset(int nr)
1119 return offsetof(struct btrfs_leaf, items) +
1120 sizeof(struct btrfs_item) * nr;
1123 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1126 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1129 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1130 struct btrfs_item *item)
1132 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1135 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1137 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1140 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1142 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1145 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1147 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1150 static inline void btrfs_item_key(struct extent_buffer *eb,
1151 struct btrfs_disk_key *disk_key, int nr)
1153 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1154 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1157 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1158 struct btrfs_disk_key *disk_key, int nr)
1160 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1161 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1164 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1166 /* struct btrfs_dir_item */
1167 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1168 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1169 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1170 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1172 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1173 struct btrfs_dir_item *item,
1174 struct btrfs_disk_key *key)
1176 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1179 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1180 struct btrfs_dir_item *item,
1181 struct btrfs_disk_key *key)
1183 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1186 /* struct btrfs_disk_key */
1187 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1189 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1190 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1192 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1193 struct btrfs_disk_key *disk)
1195 cpu->offset = le64_to_cpu(disk->offset);
1196 cpu->type = disk->type;
1197 cpu->objectid = le64_to_cpu(disk->objectid);
1200 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1201 struct btrfs_key *cpu)
1203 disk->offset = cpu_to_le64(cpu->offset);
1204 disk->type = cpu->type;
1205 disk->objectid = cpu_to_le64(cpu->objectid);
1208 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1209 struct btrfs_key *key, int nr)
1211 struct btrfs_disk_key disk_key;
1212 btrfs_node_key(eb, &disk_key, nr);
1213 btrfs_disk_key_to_cpu(key, &disk_key);
1216 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1217 struct btrfs_key *key, int nr)
1219 struct btrfs_disk_key disk_key;
1220 btrfs_item_key(eb, &disk_key, nr);
1221 btrfs_disk_key_to_cpu(key, &disk_key);
1224 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1225 struct btrfs_dir_item *item,
1226 struct btrfs_key *key)
1228 struct btrfs_disk_key disk_key;
1229 btrfs_dir_item_key(eb, item, &disk_key);
1230 btrfs_disk_key_to_cpu(key, &disk_key);
1234 static inline u8 btrfs_key_type(struct btrfs_key *key)
1239 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1244 /* struct btrfs_header */
1245 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1246 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1248 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1249 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1250 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1251 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1253 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1255 return (btrfs_header_flags(eb) & flag) == flag;
1258 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1260 u64 flags = btrfs_header_flags(eb);
1261 btrfs_set_header_flags(eb, flags | flag);
1262 return (flags & flag) == flag;
1265 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1267 u64 flags = btrfs_header_flags(eb);
1268 btrfs_set_header_flags(eb, flags & ~flag);
1269 return (flags & flag) == flag;
1272 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1274 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1278 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1280 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1284 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1286 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1290 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1292 unsigned long ptr = offsetof(struct btrfs_header, csum);
1296 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1301 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1306 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1311 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1313 return (btrfs_header_level(eb) == 0);
1316 /* struct btrfs_root_item */
1317 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1318 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1319 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1321 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1322 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1323 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1324 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1325 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1326 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1327 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1329 /* struct btrfs_super_block */
1330 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1331 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1332 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1334 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1335 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1336 struct btrfs_super_block, sys_chunk_array_size, 32);
1337 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1339 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1341 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1342 chunk_root_level, 8);
1343 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1345 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1347 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1349 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1351 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1353 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1355 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1357 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1359 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1360 root_dir_objectid, 64);
1361 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1364 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1366 return offsetof(struct btrfs_leaf, items);
1369 /* struct btrfs_file_extent_item */
1370 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1372 static inline unsigned long btrfs_file_extent_inline_start(struct
1373 btrfs_file_extent_item *e)
1375 unsigned long offset = (unsigned long)e;
1376 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1380 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1382 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1385 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1386 struct btrfs_item *e)
1388 unsigned long offset;
1389 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1390 return btrfs_item_size(eb, e) - offset;
1393 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1395 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1397 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1398 disk_num_bytes, 64);
1399 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1401 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1404 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1406 return sb->s_fs_info;
1409 static inline int btrfs_set_root_name(struct btrfs_root *root,
1410 const char *name, int len)
1412 /* if we already have a name just free it */
1416 root->name = kmalloc(len+1, GFP_KERNEL);
1420 memcpy(root->name, name, len);
1421 root->name[len] ='\0';
1426 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1428 return root->leafsize;
1429 return root->nodesize;
1432 /* helper function to cast into the data area of the leaf. */
1433 #define btrfs_item_ptr(leaf, slot, type) \
1434 ((type *)(btrfs_leaf_data(leaf) + \
1435 btrfs_item_offset_nr(leaf, slot)))
1437 #define btrfs_item_ptr_offset(leaf, slot) \
1438 ((unsigned long)(btrfs_leaf_data(leaf) + \
1439 btrfs_item_offset_nr(leaf, slot)))
1441 static inline struct dentry *fdentry(struct file *file) {
1442 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1443 return file->f_dentry;
1445 return file->f_path.dentry;
1450 int btrfs_lookup_extent(struct btrfs_root *root, struct btrfs_path *path,
1451 u64 start, u64 len);
1452 int btrfs_update_pinned_extents(struct btrfs_root *root,
1453 u64 bytenr, u64 num, int pin);
1454 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
1455 struct btrfs_root *root, struct extent_buffer *leaf);
1456 int btrfs_cross_ref_exists(struct btrfs_trans_handle *trans,
1457 struct btrfs_root *root,
1458 struct btrfs_key *key, u64 bytenr);
1459 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1460 struct btrfs_root *root);
1461 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1462 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1463 btrfs_fs_info *info,
1465 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1466 struct btrfs_block_group_cache
1467 *hint, u64 search_start,
1468 int data, int owner);
1469 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1470 struct btrfs_root *root,
1478 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans,
1479 struct btrfs_root *root,
1480 u64 bytenr, u32 blocksize);
1481 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1482 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1483 struct btrfs_root *root,
1484 struct btrfs_path *path, u64 bytenr,
1485 u64 root_objectid, u64 ref_generation,
1486 u64 owner, u64 owner_offset);
1487 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root,
1489 u64 num_bytes, u64 min_bytes,
1490 u64 root_objectid, u64 ref_generation,
1491 u64 owner, u64 owner_offset,
1492 u64 empty_size, u64 hint_byte,
1493 u64 search_end, struct btrfs_key *ins, u64 data);
1494 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1495 struct btrfs_root *root,
1496 u64 root_objectid, u64 ref_generation,
1497 u64 owner, u64 owner_offset,
1498 struct btrfs_key *ins);
1499 int btrfs_alloc_logged_extent(struct btrfs_trans_handle *trans,
1500 struct btrfs_root *root,
1501 u64 root_objectid, u64 ref_generation,
1502 u64 owner, u64 owner_offset,
1503 struct btrfs_key *ins);
1504 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root,
1506 u64 num_bytes, u64 min_alloc_size,
1507 u64 empty_size, u64 hint_byte,
1508 u64 search_end, struct btrfs_key *ins,
1510 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1511 struct extent_buffer *buf, int cache_ref);
1512 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1513 *root, u64 bytenr, u64 num_bytes,
1514 u64 root_objectid, u64 ref_generation,
1515 u64 owner_objectid, u64 owner_offset, int pin);
1516 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len);
1517 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1518 struct btrfs_root *root,
1519 struct extent_io_tree *unpin);
1520 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1521 struct btrfs_root *root,
1522 u64 bytenr, u64 num_bytes,
1523 u64 root_objectid, u64 ref_generation,
1524 u64 owner, u64 owner_offset);
1525 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root);
1527 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1528 int btrfs_read_block_groups(struct btrfs_root *root);
1529 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1530 struct btrfs_root *root, u64 bytes_used,
1531 u64 type, u64 chunk_objectid, u64 chunk_offset,
1534 int btrfs_previous_item(struct btrfs_root *root,
1535 struct btrfs_path *path, u64 min_objectid,
1538 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1539 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1540 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1541 struct btrfs_key *key, int lowest_level,
1542 int cache_only, u64 min_trans);
1543 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1544 struct btrfs_key *max_key,
1545 struct btrfs_path *path, int cache_only,
1547 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *root, struct extent_buffer *buf,
1549 struct extent_buffer *parent, int parent_slot,
1550 struct extent_buffer **cow_ret, u64 prealloc_dest);
1551 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1552 struct btrfs_root *root,
1553 struct extent_buffer *buf,
1554 struct extent_buffer **cow_ret, u64 new_root_objectid);
1555 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1556 *root, struct btrfs_path *path, u32 data_size);
1557 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1558 struct btrfs_root *root,
1559 struct btrfs_path *path,
1560 u32 new_size, int from_end);
1561 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1562 *root, struct btrfs_key *key, struct btrfs_path *p, int
1564 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *root, struct extent_buffer *parent,
1566 int start_slot, int cache_only, u64 *last_ret,
1567 struct btrfs_key *progress);
1568 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1569 struct btrfs_path *btrfs_alloc_path(void);
1570 void btrfs_free_path(struct btrfs_path *p);
1571 void btrfs_init_path(struct btrfs_path *p);
1572 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1573 struct btrfs_path *path, int slot, int nr);
1575 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1576 struct btrfs_root *root,
1577 struct btrfs_path *path)
1579 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1582 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1583 *root, struct btrfs_key *key, void *data, u32 data_size);
1584 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *root,
1586 struct btrfs_path *path,
1587 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1589 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root,
1591 struct btrfs_path *path,
1592 struct btrfs_key *key,
1595 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1598 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1599 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1600 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1601 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1604 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1605 struct btrfs_key *key);
1606 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1607 *root, struct btrfs_key *key, struct btrfs_root_item
1609 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1610 *root, struct btrfs_key *key, struct btrfs_root_item
1612 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1613 btrfs_root_item *item, struct btrfs_key *key);
1614 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1615 u64 *found_objectid);
1616 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1617 struct btrfs_root *latest_root);
1619 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1620 *root, const char *name, int name_len, u64 dir,
1621 struct btrfs_key *location, u8 type, u64 index);
1622 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1623 struct btrfs_root *root,
1624 struct btrfs_path *path, u64 dir,
1625 const char *name, int name_len,
1627 struct btrfs_dir_item *
1628 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1629 struct btrfs_root *root,
1630 struct btrfs_path *path, u64 dir,
1631 u64 objectid, const char *name, int name_len,
1633 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1634 struct btrfs_path *path,
1635 const char *name, int name_len);
1636 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1637 struct btrfs_root *root,
1638 struct btrfs_path *path,
1639 struct btrfs_dir_item *di);
1640 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1641 struct btrfs_root *root, const char *name,
1642 u16 name_len, const void *data, u16 data_len,
1644 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1645 struct btrfs_root *root,
1646 struct btrfs_path *path, u64 dir,
1647 const char *name, u16 name_len,
1651 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
1652 struct btrfs_root *root, u64 offset);
1653 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
1654 struct btrfs_root *root, u64 offset);
1657 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1658 struct btrfs_root *fs_root,
1659 u64 dirid, u64 *objectid);
1660 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1663 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1664 struct btrfs_root *root,
1665 const char *name, int name_len,
1666 u64 inode_objectid, u64 ref_objectid, u64 index);
1667 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1668 struct btrfs_root *root,
1669 const char *name, int name_len,
1670 u64 inode_objectid, u64 ref_objectid, u64 *index);
1671 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1672 struct btrfs_root *root,
1673 struct btrfs_path *path, u64 objectid);
1674 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1675 *root, struct btrfs_path *path,
1676 struct btrfs_key *location, int mod);
1679 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode,
1681 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1682 struct btrfs_root *root,
1683 u64 objectid, u64 pos, u64 disk_offset,
1685 u64 num_bytes, u64 offset);
1686 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1687 struct btrfs_root *root,
1688 struct btrfs_path *path, u64 objectid,
1689 u64 bytenr, int mod);
1690 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1691 struct btrfs_root *root, struct inode *inode,
1692 struct btrfs_ordered_sum *sums);
1693 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1695 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1696 struct btrfs_root *root,
1697 struct btrfs_path *path,
1698 u64 objectid, u64 offset,
1700 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1701 struct btrfs_root *root, struct btrfs_path *path,
1705 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1706 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
1707 #define ClearPageChecked ClearPageFsMisc
1708 #define SetPageChecked SetPageFsMisc
1709 #define PageChecked PageFsMisc
1712 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
1713 struct btrfs_root *root,
1714 struct inode *dir, struct inode *inode,
1715 const char *name, int name_len);
1716 int btrfs_add_link(struct btrfs_trans_handle *trans,
1717 struct inode *parent_inode, struct inode *inode,
1718 const char *name, int name_len, int add_backref, u64 index);
1719 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
1720 struct btrfs_root *root,
1721 struct inode *inode, u64 new_size,
1724 int btrfs_start_delalloc_inodes(struct btrfs_root *root);
1725 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end);
1726 int btrfs_writepages(struct address_space *mapping,
1727 struct writeback_control *wbc);
1728 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1729 struct btrfs_trans_handle *trans, u64 new_dirid,
1730 struct btrfs_block_group_cache *block_group);
1732 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1735 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1736 size_t size, struct bio *bio);
1738 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1741 if (dec <= inode->i_blocks)
1742 inode->i_blocks -= dec;
1744 inode->i_blocks = 0;
1747 unsigned long btrfs_force_ra(struct address_space *mapping,
1748 struct file_ra_state *ra, struct file *file,
1749 pgoff_t offset, pgoff_t last_index);
1750 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1752 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1753 int btrfs_readpage(struct file *file, struct page *page);
1754 void btrfs_delete_inode(struct inode *inode);
1755 void btrfs_put_inode(struct inode *inode);
1756 void btrfs_read_locked_inode(struct inode *inode);
1757 int btrfs_write_inode(struct inode *inode, int wait);
1758 void btrfs_dirty_inode(struct inode *inode);
1759 struct inode *btrfs_alloc_inode(struct super_block *sb);
1760 void btrfs_destroy_inode(struct inode *inode);
1761 int btrfs_init_cachep(void);
1762 void btrfs_destroy_cachep(void);
1763 long btrfs_ioctl_trans_end(struct file *file);
1764 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1765 struct btrfs_root *root);
1766 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location,
1767 struct btrfs_root *root, int *is_new);
1768 int btrfs_commit_write(struct file *file, struct page *page,
1769 unsigned from, unsigned to);
1770 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1771 size_t page_offset, u64 start, u64 end,
1773 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1774 struct btrfs_root *root,
1775 struct inode *inode);
1778 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1781 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
1782 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1783 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1784 extern struct file_operations btrfs_file_operations;
1785 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1786 struct btrfs_root *root, struct inode *inode,
1787 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1788 int btrfs_release_file(struct inode *inode, struct file *file);
1791 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1792 struct btrfs_root *root, int cache_only);
1795 int btrfs_init_sysfs(void);
1796 void btrfs_exit_sysfs(void);
1797 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1798 int btrfs_sysfs_add_root(struct btrfs_root *root);
1799 void btrfs_sysfs_del_root(struct btrfs_root *root);
1800 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1803 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1806 u64 btrfs_parse_size(char *str);
1807 int btrfs_parse_options(struct btrfs_root *root, char *options);
1808 int btrfs_sync_fs(struct super_block *sb, int wait);
1811 int btrfs_check_acl(struct inode *inode, int mask);
1812 int btrfs_init_acl(struct inode *inode, struct inode *dir);
1813 int btrfs_acl_chmod(struct inode *inode);