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 "_B5RfS_M"
45 #define BTRFS_MAX_LEVEL 8
47 /* holds pointers to all of the tree roots */
48 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
50 /* stores information about which extents are in use, and reference counts */
51 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
54 * chunk tree stores translations from logical -> physical block numbering
55 * the super block points to the chunk tree
57 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
60 * stores information about which areas of a given device are in use.
61 * one per device. The tree of tree roots points to the device tree
63 #define BTRFS_DEV_TREE_OBJECTID 4ULL
65 /* one per subvolume, storing files and directories */
66 #define BTRFS_FS_TREE_OBJECTID 5ULL
68 /* directory objectid inside the root tree */
69 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 * All files have objectids higher than this.
74 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
75 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
79 * the device items go into the chunk tree. The key is in the form
80 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
82 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
85 * we can actually store much bigger names, but lets not confuse the rest
88 #define BTRFS_NAME_LEN 255
90 /* 32 bytes in various csum fields */
91 #define BTRFS_CSUM_SIZE 32
92 /* four bytes for CRC32 */
93 #define BTRFS_CRC32_SIZE 4
94 #define BTRFS_EMPTY_DIR_SIZE 0
96 #define BTRFS_FT_UNKNOWN 0
97 #define BTRFS_FT_REG_FILE 1
98 #define BTRFS_FT_DIR 2
99 #define BTRFS_FT_CHRDEV 3
100 #define BTRFS_FT_BLKDEV 4
101 #define BTRFS_FT_FIFO 5
102 #define BTRFS_FT_SOCK 6
103 #define BTRFS_FT_SYMLINK 7
104 #define BTRFS_FT_XATTR 8
105 #define BTRFS_FT_MAX 9
108 * the key defines the order in the tree, and so it also defines (optimal)
109 * block layout. objectid corresonds to the inode number. The flags
110 * tells us things about the object, and is a kind of stream selector.
111 * so for a given inode, keys with flags of 1 might refer to the inode
112 * data, flags of 2 may point to file data in the btree and flags == 3
113 * may point to extents.
115 * offset is the starting byte offset for this key in the stream.
117 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
118 * in cpu native order. Otherwise they are identical and their sizes
119 * should be the same (ie both packed)
121 struct btrfs_disk_key {
125 } __attribute__ ((__packed__));
131 } __attribute__ ((__packed__));
133 struct btrfs_mapping_tree {
134 struct extent_map_tree map_tree;
137 #define BTRFS_UUID_SIZE 16
138 struct btrfs_dev_item {
139 /* the internal btrfs device id */
142 /* size of the device */
148 /* optimal io alignment for this device */
151 /* optimal io width for this device */
154 /* minimal io size for this device */
157 /* type and info about this device */
160 /* grouping information for allocation decisions */
163 /* seek speed 0-100 where 100 is fastest */
166 /* bandwidth 0-100 where 100 is fastest */
169 /* btrfs generated uuid for this device */
170 u8 uuid[BTRFS_UUID_SIZE];
171 } __attribute__ ((__packed__));
173 struct btrfs_stripe {
176 u8 dev_uuid[BTRFS_UUID_SIZE];
177 } __attribute__ ((__packed__));
180 /* size of this chunk in bytes */
183 /* objectid of the root referencing this chunk */
189 /* optimal io alignment for this chunk */
192 /* optimal io width for this chunk */
195 /* minimal io size for this chunk */
198 /* 2^16 stripes is quite a lot, a second limit is the size of a single
203 /* sub stripes only matter for raid10 */
205 struct btrfs_stripe stripe;
206 /* additional stripes go here */
207 } __attribute__ ((__packed__));
209 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
211 BUG_ON(num_stripes == 0);
212 return sizeof(struct btrfs_chunk) +
213 sizeof(struct btrfs_stripe) * (num_stripes - 1);
216 #define BTRFS_FSID_SIZE 16
217 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
220 * every tree block (leaf or node) starts with this header.
222 struct btrfs_header {
223 /* these first four must match the super block */
224 u8 csum[BTRFS_CSUM_SIZE];
225 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
226 __le64 bytenr; /* which block this node is supposed to live in */
229 /* allowed to be different from the super from here on down */
230 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
235 } __attribute__ ((__packed__));
237 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
238 sizeof(struct btrfs_header)) / \
239 sizeof(struct btrfs_key_ptr))
240 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
241 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
242 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
243 sizeof(struct btrfs_item) - \
244 sizeof(struct btrfs_file_extent_item))
248 * this is a very generous portion of the super block, giving us
249 * room to translate 14 chunks with 3 stripes each.
251 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
252 #define BTRFS_LABEL_SIZE 256
255 * the super block basically lists the main trees of the FS
256 * it currently lacks any block count etc etc
258 struct btrfs_super_block {
259 u8 csum[BTRFS_CSUM_SIZE];
260 /* the first 4 fields must match struct btrfs_header */
261 u8 fsid[16]; /* FS specific uuid */
262 __le64 bytenr; /* this block number */
265 /* allowed to be different from the btrfs_header from here own down */
272 __le64 root_dir_objectid;
278 __le32 sys_chunk_array_size;
281 struct btrfs_dev_item dev_item;
282 char label[BTRFS_LABEL_SIZE];
283 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
284 } __attribute__ ((__packed__));
287 * A leaf is full of items. offset and size tell us where to find
288 * the item in the leaf (relative to the start of the data area)
291 struct btrfs_disk_key key;
294 } __attribute__ ((__packed__));
297 * leaves have an item area and a data area:
298 * [item0, item1....itemN] [free space] [dataN...data1, data0]
300 * The data is separate from the items to get the keys closer together
304 struct btrfs_header header;
305 struct btrfs_item items[];
306 } __attribute__ ((__packed__));
309 * all non-leaf blocks are nodes, they hold only keys and pointers to
312 struct btrfs_key_ptr {
313 struct btrfs_disk_key key;
316 } __attribute__ ((__packed__));
319 struct btrfs_header header;
320 struct btrfs_key_ptr ptrs[];
321 } __attribute__ ((__packed__));
324 * btrfs_paths remember the path taken from the root down to the leaf.
325 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
326 * to any other levels that are present.
328 * The slots array records the index of the item or block pointer
329 * used while walking the tree.
332 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
333 int slots[BTRFS_MAX_LEVEL];
334 /* if there is real range locking, this locks field will change */
335 int locks[BTRFS_MAX_LEVEL];
337 /* keep some upper locks as we walk down */
344 * items in the extent btree are used to record the objectid of the
345 * owner of the block and the number of references
347 struct btrfs_extent_item {
349 } __attribute__ ((__packed__));
351 struct btrfs_extent_ref {
356 } __attribute__ ((__packed__));
358 /* dev extents record free space on individual devices. The owner
359 * field points back to the chunk allocation mapping tree that allocated
360 * the extent. The chunk tree uuid field is a way to double check the owner
362 struct btrfs_dev_extent {
364 __le64 chunk_objectid;
367 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
368 } __attribute__ ((__packed__));
370 struct btrfs_inode_ref {
373 } __attribute__ ((__packed__));
375 struct btrfs_timespec {
378 } __attribute__ ((__packed__));
381 * there is no padding here on purpose. If you want to extent the inode,
382 * make a new item type
384 struct btrfs_inode_item {
396 struct btrfs_timespec atime;
397 struct btrfs_timespec ctime;
398 struct btrfs_timespec mtime;
399 struct btrfs_timespec otime;
400 } __attribute__ ((__packed__));
402 struct btrfs_dir_item {
403 struct btrfs_disk_key location;
407 } __attribute__ ((__packed__));
409 struct btrfs_root_item {
410 struct btrfs_inode_item inode;
417 struct btrfs_disk_key drop_progress;
420 } __attribute__ ((__packed__));
422 #define BTRFS_FILE_EXTENT_REG 0
423 #define BTRFS_FILE_EXTENT_INLINE 1
425 struct btrfs_file_extent_item {
429 * disk space consumed by the extent, checksum blocks are included
433 __le64 disk_num_bytes;
435 * the logical offset in file blocks (no csums)
436 * this extent record is for. This allows a file extent to point
437 * into the middle of an existing extent on disk, sharing it
438 * between two snapshots (useful if some bytes in the middle of the
439 * extent have changed
443 * the logical number of file blocks (no csums included)
446 } __attribute__ ((__packed__));
448 struct btrfs_csum_item {
450 } __attribute__ ((__packed__));
452 /* different types of block groups (and chunks) */
453 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
454 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
455 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
456 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
457 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
458 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
459 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
462 struct btrfs_block_group_item {
464 __le64 chunk_objectid;
466 } __attribute__ ((__packed__));
468 struct btrfs_space_info {
475 struct list_head list;
478 struct btrfs_block_group_cache {
479 struct btrfs_key key;
480 struct btrfs_block_group_item item;
481 struct btrfs_space_info *space_info;
489 struct btrfs_fs_devices;
490 struct btrfs_fs_info {
491 u8 fsid[BTRFS_FSID_SIZE];
492 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
493 struct btrfs_root *extent_root;
494 struct btrfs_root *tree_root;
495 struct btrfs_root *chunk_root;
496 struct btrfs_root *dev_root;
497 struct radix_tree_root fs_roots_radix;
499 struct extent_io_tree free_space_cache;
500 struct extent_io_tree block_group_cache;
501 struct extent_io_tree pinned_extents;
502 struct extent_io_tree pending_del;
503 struct extent_io_tree extent_ins;
505 /* logical->physical extent mapping */
506 struct btrfs_mapping_tree mapping_tree;
509 u64 last_trans_committed;
510 unsigned long mount_opt;
514 struct btrfs_transaction *running_transaction;
515 wait_queue_head_t transaction_throttle;
516 struct btrfs_super_block super_copy;
517 struct btrfs_super_block super_for_commit;
518 struct block_device *__bdev;
519 struct super_block *sb;
520 struct inode *btree_inode;
521 struct backing_dev_info bdi;
522 spinlock_t hash_lock;
523 struct mutex trans_mutex;
524 struct mutex transaction_kthread_mutex;
525 struct mutex cleaner_mutex;
526 struct mutex alloc_mutex;
527 struct mutex chunk_mutex;
528 struct mutex drop_mutex;
529 struct mutex volume_mutex;
530 struct list_head trans_list;
531 struct list_head hashers;
532 struct list_head dead_roots;
533 atomic_t nr_async_submits;
536 * there is a pool of worker threads for checksumming during writes
537 * and a pool for checksumming after reads. This is because readers
538 * can run with FS locks held, and the writers may be waiting for
539 * those locks. We don't want ordering in the pending list to cause
540 * deadlocks, and so the two are serviced separately.
542 * A third pool does submit_bio to avoid deadlocking with the other
545 struct btrfs_workers workers;
546 struct btrfs_workers endio_workers;
547 struct btrfs_workers endio_write_workers;
548 struct btrfs_workers submit_workers;
550 * fixup workers take dirty pages that didn't properly go through
551 * the cow mechanism and make them safe to write. It happens
552 * for the sys_munmap function call path
554 struct btrfs_workers fixup_workers;
555 struct task_struct *transaction_kthread;
556 struct task_struct *cleaner_kthread;
557 int thread_pool_size;
559 struct kobject super_kobj;
560 struct completion kobj_unregister;
566 struct list_head dirty_cowonly_roots;
568 struct btrfs_fs_devices *fs_devices;
569 struct list_head space_info;
570 spinlock_t delalloc_lock;
571 spinlock_t new_trans_lock;
576 u64 avail_data_alloc_bits;
577 u64 avail_metadata_alloc_bits;
578 u64 avail_system_alloc_bits;
579 u64 data_alloc_profile;
580 u64 metadata_alloc_profile;
581 u64 system_alloc_profile;
587 * in ram representation of the tree. extent_root is used for all allocations
588 * and for the extent tree extent_root root.
591 struct extent_buffer *node;
593 /* the node lock is held while changing the node pointer */
594 spinlock_t node_lock;
596 struct extent_buffer *commit_root;
597 struct btrfs_root_item root_item;
598 struct btrfs_key root_key;
599 struct btrfs_fs_info *fs_info;
601 struct kobject root_kobj;
602 struct completion kobj_unregister;
603 struct mutex objectid_mutex;
607 /* data allocations are done in sectorsize units */
610 /* node allocations are done in nodesize units */
613 /* leaf allocations are done in leafsize units */
620 u64 last_inode_alloc;
623 u64 defrag_trans_start;
624 struct btrfs_key defrag_progress;
625 struct btrfs_key defrag_max;
631 /* the dirty list is only used by non-reference counted roots */
632 struct list_head dirty_list;
637 * inode items have the data typically returned from stat and store other
638 * info about object characteristics. There is one for every file and dir in
641 #define BTRFS_INODE_ITEM_KEY 1
642 #define BTRFS_INODE_REF_KEY 2
643 #define BTRFS_XATTR_ITEM_KEY 8
644 /* reserve 2-15 close to the inode for later flexibility */
647 * dir items are the name -> inode pointers in a directory. There is one
648 * for every name in a directory.
650 #define BTRFS_DIR_ITEM_KEY 16
651 #define BTRFS_DIR_INDEX_KEY 17
653 * extent data is for file data
655 #define BTRFS_EXTENT_DATA_KEY 18
657 * csum items have the checksums for data in the extents
659 #define BTRFS_CSUM_ITEM_KEY 19
661 /* reserve 20-31 for other file stuff */
664 * root items point to tree roots. There are typically in the root
665 * tree used by the super block to find all the other trees
667 #define BTRFS_ROOT_ITEM_KEY 32
669 * extent items are in the extent map tree. These record which blocks
670 * are used, and how many references there are to each block
672 #define BTRFS_EXTENT_ITEM_KEY 33
673 #define BTRFS_EXTENT_REF_KEY 34
676 * block groups give us hints into the extent allocation trees. Which
677 * blocks are free etc etc
679 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
681 #define BTRFS_DEV_EXTENT_KEY 75
682 #define BTRFS_DEV_ITEM_KEY 76
683 #define BTRFS_CHUNK_ITEM_KEY 77
686 * string items are for debugging. They just store a short string of
689 #define BTRFS_STRING_ITEM_KEY 253
691 #define BTRFS_MOUNT_NODATASUM (1 << 0)
692 #define BTRFS_MOUNT_NODATACOW (1 << 1)
693 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
694 #define BTRFS_MOUNT_SSD (1 << 3)
695 #define BTRFS_MOUNT_DEGRADED (1 << 4)
697 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
698 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
699 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
704 #define BTRFS_INODE_NODATASUM (1 << 0)
705 #define BTRFS_INODE_NODATACOW (1 << 1)
706 #define BTRFS_INODE_READONLY (1 << 2)
707 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
709 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
711 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
713 /* some macros to generate set/get funcs for the struct fields. This
714 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
717 #define le8_to_cpu(v) (v)
718 #define cpu_to_le8(v) (v)
721 #define read_eb_member(eb, ptr, type, member, result) ( \
722 read_extent_buffer(eb, (char *)(result), \
723 ((unsigned long)(ptr)) + \
724 offsetof(type, member), \
725 sizeof(((type *)0)->member)))
727 #define write_eb_member(eb, ptr, type, member, result) ( \
728 write_extent_buffer(eb, (char *)(result), \
729 ((unsigned long)(ptr)) + \
730 offsetof(type, member), \
731 sizeof(((type *)0)->member)))
733 #ifndef BTRFS_SETGET_FUNCS
734 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
735 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
736 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
739 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
740 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
742 type *p = kmap_atomic(eb->first_page, KM_USER0); \
743 u##bits res = le##bits##_to_cpu(p->member); \
744 kunmap_atomic(p, KM_USER0); \
747 static inline void btrfs_set_##name(struct extent_buffer *eb, \
750 type *p = kmap_atomic(eb->first_page, KM_USER0); \
751 p->member = cpu_to_le##bits(val); \
752 kunmap_atomic(p, KM_USER0); \
755 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
756 static inline u##bits btrfs_##name(type *s) \
758 return le##bits##_to_cpu(s->member); \
760 static inline void btrfs_set_##name(type *s, u##bits val) \
762 s->member = cpu_to_le##bits(val); \
765 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
766 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
767 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
768 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
769 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
770 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
771 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
772 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
773 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
774 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
776 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
777 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
779 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
781 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
783 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
785 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
787 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
788 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
790 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
792 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
795 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
797 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
800 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
801 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
802 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
803 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
804 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
805 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
806 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
807 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
808 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
809 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
810 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
812 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
814 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
817 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
818 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
819 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
821 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
823 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
825 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
827 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
828 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
830 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
832 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
833 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
835 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
838 unsigned long offset = (unsigned long)c;
839 offset += offsetof(struct btrfs_chunk, stripe);
840 offset += nr * sizeof(struct btrfs_stripe);
841 return (struct btrfs_stripe *)offset;
844 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
846 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
849 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
850 struct btrfs_chunk *c, int nr)
852 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
855 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
856 struct btrfs_chunk *c, int nr,
859 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
862 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
863 struct btrfs_chunk *c, int nr)
865 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
868 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
869 struct btrfs_chunk *c, int nr,
872 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
875 /* struct btrfs_block_group_item */
876 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
878 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
880 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
881 struct btrfs_block_group_item, chunk_objectid, 64);
883 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
884 struct btrfs_block_group_item, chunk_objectid, 64);
885 BTRFS_SETGET_FUNCS(disk_block_group_flags,
886 struct btrfs_block_group_item, flags, 64);
887 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
888 struct btrfs_block_group_item, flags, 64);
890 /* struct btrfs_inode_ref */
891 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
893 /* struct btrfs_inode_item */
894 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
895 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
896 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
897 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
898 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
899 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
900 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
901 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
902 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
903 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
904 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
907 static inline struct btrfs_timespec *
908 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
910 unsigned long ptr = (unsigned long)inode_item;
911 ptr += offsetof(struct btrfs_inode_item, atime);
912 return (struct btrfs_timespec *)ptr;
915 static inline struct btrfs_timespec *
916 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
918 unsigned long ptr = (unsigned long)inode_item;
919 ptr += offsetof(struct btrfs_inode_item, mtime);
920 return (struct btrfs_timespec *)ptr;
923 static inline struct btrfs_timespec *
924 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
926 unsigned long ptr = (unsigned long)inode_item;
927 ptr += offsetof(struct btrfs_inode_item, ctime);
928 return (struct btrfs_timespec *)ptr;
931 static inline struct btrfs_timespec *
932 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
934 unsigned long ptr = (unsigned long)inode_item;
935 ptr += offsetof(struct btrfs_inode_item, otime);
936 return (struct btrfs_timespec *)ptr;
939 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
940 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
942 /* struct btrfs_extent_item */
943 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
945 /* struct btrfs_dev_extent */
946 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
948 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
950 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
952 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
954 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
956 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
957 return (u8 *)((unsigned long)dev + ptr);
960 /* struct btrfs_extent_ref */
961 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
962 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
963 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
964 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
966 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
967 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
969 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
971 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
973 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
976 /* struct btrfs_node */
977 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
978 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
980 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
983 ptr = offsetof(struct btrfs_node, ptrs) +
984 sizeof(struct btrfs_key_ptr) * nr;
985 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
988 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
992 ptr = offsetof(struct btrfs_node, ptrs) +
993 sizeof(struct btrfs_key_ptr) * nr;
994 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
997 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1000 ptr = offsetof(struct btrfs_node, ptrs) +
1001 sizeof(struct btrfs_key_ptr) * nr;
1002 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1005 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1009 ptr = offsetof(struct btrfs_node, ptrs) +
1010 sizeof(struct btrfs_key_ptr) * nr;
1011 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1014 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1016 return offsetof(struct btrfs_node, ptrs) +
1017 sizeof(struct btrfs_key_ptr) * nr;
1020 void btrfs_node_key(struct extent_buffer *eb,
1021 struct btrfs_disk_key *disk_key, int nr);
1023 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1024 struct btrfs_disk_key *disk_key, int nr)
1027 ptr = btrfs_node_key_ptr_offset(nr);
1028 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1029 struct btrfs_key_ptr, key, disk_key);
1032 /* struct btrfs_item */
1033 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1034 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1036 static inline unsigned long btrfs_item_nr_offset(int nr)
1038 return offsetof(struct btrfs_leaf, items) +
1039 sizeof(struct btrfs_item) * nr;
1042 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1045 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1048 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1049 struct btrfs_item *item)
1051 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1054 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1056 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1059 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1061 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1064 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1066 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1069 static inline void btrfs_item_key(struct extent_buffer *eb,
1070 struct btrfs_disk_key *disk_key, int nr)
1072 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1073 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1076 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1077 struct btrfs_disk_key *disk_key, int nr)
1079 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1080 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1083 /* struct btrfs_dir_item */
1084 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1085 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1086 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1088 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1089 struct btrfs_dir_item *item,
1090 struct btrfs_disk_key *key)
1092 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1095 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1096 struct btrfs_dir_item *item,
1097 struct btrfs_disk_key *key)
1099 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1102 /* struct btrfs_disk_key */
1103 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1105 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1106 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1108 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1109 struct btrfs_disk_key *disk)
1111 cpu->offset = le64_to_cpu(disk->offset);
1112 cpu->type = disk->type;
1113 cpu->objectid = le64_to_cpu(disk->objectid);
1116 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1117 struct btrfs_key *cpu)
1119 disk->offset = cpu_to_le64(cpu->offset);
1120 disk->type = cpu->type;
1121 disk->objectid = cpu_to_le64(cpu->objectid);
1124 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1125 struct btrfs_key *key, int nr)
1127 struct btrfs_disk_key disk_key;
1128 btrfs_node_key(eb, &disk_key, nr);
1129 btrfs_disk_key_to_cpu(key, &disk_key);
1132 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1133 struct btrfs_key *key, int nr)
1135 struct btrfs_disk_key disk_key;
1136 btrfs_item_key(eb, &disk_key, nr);
1137 btrfs_disk_key_to_cpu(key, &disk_key);
1140 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1141 struct btrfs_dir_item *item,
1142 struct btrfs_key *key)
1144 struct btrfs_disk_key disk_key;
1145 btrfs_dir_item_key(eb, item, &disk_key);
1146 btrfs_disk_key_to_cpu(key, &disk_key);
1150 static inline u8 btrfs_key_type(struct btrfs_key *key)
1155 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1160 /* struct btrfs_header */
1161 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1162 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1164 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1165 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1166 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1167 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1169 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1171 return (btrfs_header_flags(eb) & flag) == flag;
1174 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1176 u64 flags = btrfs_header_flags(eb);
1177 btrfs_set_header_flags(eb, flags | flag);
1178 return (flags & flag) == flag;
1181 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1183 u64 flags = btrfs_header_flags(eb);
1184 btrfs_set_header_flags(eb, flags & ~flag);
1185 return (flags & flag) == flag;
1188 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1190 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1194 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1196 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1200 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1202 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1206 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1208 unsigned long ptr = offsetof(struct btrfs_header, csum);
1212 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1217 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1222 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1227 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1229 return (btrfs_header_level(eb) == 0);
1232 /* struct btrfs_root_item */
1233 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1234 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1235 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1237 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1238 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1239 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1240 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1241 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1242 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1243 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1245 /* struct btrfs_super_block */
1246 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1247 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1248 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1250 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1251 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1252 struct btrfs_super_block, sys_chunk_array_size, 32);
1253 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1255 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1257 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1258 chunk_root_level, 64);
1259 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1261 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1263 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1265 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1267 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1269 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1271 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1272 root_dir_objectid, 64);
1273 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1276 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1278 return offsetof(struct btrfs_leaf, items);
1281 /* struct btrfs_file_extent_item */
1282 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1284 static inline unsigned long btrfs_file_extent_inline_start(struct
1285 btrfs_file_extent_item *e)
1287 unsigned long offset = (unsigned long)e;
1288 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1292 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1294 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1297 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1298 struct btrfs_item *e)
1300 unsigned long offset;
1301 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1302 return btrfs_item_size(eb, e) - offset;
1305 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1307 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1309 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1310 disk_num_bytes, 64);
1311 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1313 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1316 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1318 return sb->s_fs_info;
1321 static inline int btrfs_set_root_name(struct btrfs_root *root,
1322 const char *name, int len)
1324 /* if we already have a name just free it */
1328 root->name = kmalloc(len+1, GFP_KERNEL);
1332 memcpy(root->name, name, len);
1333 root->name[len] ='\0';
1338 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1340 return root->leafsize;
1341 return root->nodesize;
1344 /* helper function to cast into the data area of the leaf. */
1345 #define btrfs_item_ptr(leaf, slot, type) \
1346 ((type *)(btrfs_leaf_data(leaf) + \
1347 btrfs_item_offset_nr(leaf, slot)))
1349 #define btrfs_item_ptr_offset(leaf, slot) \
1350 ((unsigned long)(btrfs_leaf_data(leaf) + \
1351 btrfs_item_offset_nr(leaf, slot)))
1353 static inline struct dentry *fdentry(struct file *file) {
1354 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1355 return file->f_dentry;
1357 return file->f_path.dentry;
1362 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1363 struct btrfs_path *count_path,
1364 u64 expected_owner, u64 first_extent);
1365 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1366 struct btrfs_root *root);
1367 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1368 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1369 btrfs_fs_info *info,
1371 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1372 struct btrfs_block_group_cache
1373 *hint, u64 search_start,
1374 int data, int owner);
1375 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1376 struct btrfs_root *root,
1384 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1385 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1386 struct btrfs_root *root,
1387 struct btrfs_path *path, u64 bytenr,
1388 u64 root_objectid, u64 ref_generation,
1389 u64 owner, u64 owner_offset);
1390 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1391 struct btrfs_root *root,
1392 u64 num_bytes, u64 min_bytes,
1393 u64 root_objectid, u64 ref_generation,
1394 u64 owner, u64 owner_offset,
1395 u64 empty_size, u64 hint_byte,
1396 u64 search_end, struct btrfs_key *ins, u64 data);
1397 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1398 struct btrfs_root *root,
1399 u64 root_objectid, u64 ref_generation,
1400 u64 owner, u64 owner_offset,
1401 struct btrfs_key *ins);
1402 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root,
1404 u64 num_bytes, u64 min_alloc_size,
1405 u64 empty_size, u64 hint_byte,
1406 u64 search_end, struct btrfs_key *ins,
1408 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1409 struct extent_buffer *buf);
1410 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1411 *root, u64 bytenr, u64 num_bytes,
1412 u64 root_objectid, u64 ref_generation,
1413 u64 owner_objectid, u64 owner_offset, int pin);
1414 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1415 struct btrfs_root *root,
1416 struct extent_io_tree *unpin);
1417 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1418 struct btrfs_root *root,
1419 u64 bytenr, u64 num_bytes,
1420 u64 root_objectid, u64 ref_generation,
1421 u64 owner, u64 owner_offset);
1422 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1423 struct btrfs_root *root);
1424 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1425 int btrfs_read_block_groups(struct btrfs_root *root);
1426 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1427 struct btrfs_root *root, u64 bytes_used,
1428 u64 type, u64 chunk_objectid, u64 chunk_offset,
1431 int btrfs_previous_item(struct btrfs_root *root,
1432 struct btrfs_path *path, u64 min_objectid,
1435 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1436 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1437 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1438 struct btrfs_key *key, int lowest_level,
1439 int cache_only, u64 min_trans);
1440 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1441 struct btrfs_path *path, int cache_only,
1444 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1445 struct btrfs_root *root, struct extent_buffer *buf,
1446 struct extent_buffer *parent, int parent_slot,
1447 struct extent_buffer **cow_ret);
1448 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1449 struct btrfs_root *root,
1450 struct extent_buffer *buf,
1451 struct extent_buffer **cow_ret, u64 new_root_objectid);
1452 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1453 *root, struct btrfs_path *path, u32 data_size);
1454 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1455 struct btrfs_root *root,
1456 struct btrfs_path *path,
1457 u32 new_size, int from_end);
1458 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1459 *root, struct btrfs_key *key, struct btrfs_path *p, int
1461 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1462 struct btrfs_root *root, struct extent_buffer *parent,
1463 int start_slot, int cache_only, u64 *last_ret,
1464 struct btrfs_key *progress);
1465 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1466 struct btrfs_path *btrfs_alloc_path(void);
1467 void btrfs_free_path(struct btrfs_path *p);
1468 void btrfs_init_path(struct btrfs_path *p);
1469 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1470 struct btrfs_path *path, int slot, int nr);
1472 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1473 struct btrfs_root *root,
1474 struct btrfs_path *path)
1476 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1479 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1480 *root, struct btrfs_key *key, void *data, u32 data_size);
1481 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1482 struct btrfs_root *root,
1483 struct btrfs_path *path,
1484 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1486 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1487 struct btrfs_root *root,
1488 struct btrfs_path *path,
1489 struct btrfs_key *key,
1492 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1495 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1496 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1497 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1498 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1501 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1502 struct btrfs_key *key);
1503 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1504 *root, struct btrfs_key *key, struct btrfs_root_item
1506 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1507 *root, struct btrfs_key *key, struct btrfs_root_item
1509 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1510 btrfs_root_item *item, struct btrfs_key *key);
1511 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1512 u64 *found_objectid);
1513 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1514 struct btrfs_root *latest_root);
1516 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1517 *root, const char *name, int name_len, u64 dir,
1518 struct btrfs_key *location, u8 type);
1519 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1520 struct btrfs_root *root,
1521 struct btrfs_path *path, u64 dir,
1522 const char *name, int name_len,
1524 struct btrfs_dir_item *
1525 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root,
1527 struct btrfs_path *path, u64 dir,
1528 u64 objectid, const char *name, int name_len,
1530 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1531 struct btrfs_path *path,
1532 const char *name, int name_len);
1533 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1534 struct btrfs_root *root,
1535 struct btrfs_path *path,
1536 struct btrfs_dir_item *di);
1537 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1538 struct btrfs_root *root, const char *name,
1539 u16 name_len, const void *data, u16 data_len,
1541 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1542 struct btrfs_root *root,
1543 struct btrfs_path *path, u64 dir,
1544 const char *name, u16 name_len,
1547 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *fs_root,
1549 u64 dirid, u64 *objectid);
1550 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1553 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1554 struct btrfs_root *root,
1555 const char *name, int name_len,
1556 u64 inode_objectid, u64 ref_objectid);
1557 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1558 struct btrfs_root *root,
1559 const char *name, int name_len,
1560 u64 inode_objectid, u64 ref_objectid);
1561 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1562 struct btrfs_root *root,
1563 struct btrfs_path *path, u64 objectid);
1564 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1565 *root, struct btrfs_path *path,
1566 struct btrfs_key *location, int mod);
1569 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1570 struct btrfs_root *root,
1571 u64 objectid, u64 pos, u64 disk_offset,
1573 u64 num_bytes, u64 offset);
1574 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1575 struct btrfs_root *root,
1576 struct btrfs_path *path, u64 objectid,
1577 u64 bytenr, int mod);
1578 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1579 struct btrfs_root *root, struct inode *inode,
1580 struct btrfs_ordered_sum *sums);
1581 int btrfs_csum_one_bio(struct btrfs_root *root,
1582 struct bio *bio, struct btrfs_ordered_sum **sums_ret);
1583 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1584 struct btrfs_root *root,
1585 struct btrfs_path *path,
1586 u64 objectid, u64 offset,
1588 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1589 struct btrfs_root *root, struct btrfs_path *path,
1592 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1593 struct btrfs_trans_handle *trans, u64 new_dirid,
1594 struct btrfs_block_group_cache *block_group);
1596 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1599 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1600 size_t size, struct bio *bio);
1602 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1605 if (dec <= inode->i_blocks)
1606 inode->i_blocks -= dec;
1608 inode->i_blocks = 0;
1611 unsigned long btrfs_force_ra(struct address_space *mapping,
1612 struct file_ra_state *ra, struct file *file,
1613 pgoff_t offset, pgoff_t last_index);
1614 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1616 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1617 int btrfs_readpage(struct file *file, struct page *page);
1618 void btrfs_delete_inode(struct inode *inode);
1619 void btrfs_put_inode(struct inode *inode);
1620 void btrfs_read_locked_inode(struct inode *inode);
1621 int btrfs_write_inode(struct inode *inode, int wait);
1622 void btrfs_dirty_inode(struct inode *inode);
1623 struct inode *btrfs_alloc_inode(struct super_block *sb);
1624 void btrfs_destroy_inode(struct inode *inode);
1625 int btrfs_init_cachep(void);
1626 void btrfs_destroy_cachep(void);
1627 long btrfs_ioctl_trans_end(struct file *file);
1628 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1629 struct btrfs_root *root);
1630 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1632 int btrfs_commit_write(struct file *file, struct page *page,
1633 unsigned from, unsigned to);
1634 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1635 size_t page_offset, u64 start, u64 end,
1637 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1638 struct btrfs_root *root,
1639 struct inode *inode);
1642 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1645 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1646 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1647 extern struct file_operations btrfs_file_operations;
1648 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1649 struct btrfs_root *root, struct inode *inode,
1650 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1651 int btrfs_release_file(struct inode *inode, struct file *file);
1654 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1655 struct btrfs_root *root, int cache_only);
1658 int btrfs_init_sysfs(void);
1659 void btrfs_exit_sysfs(void);
1660 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1661 int btrfs_sysfs_add_root(struct btrfs_root *root);
1662 void btrfs_sysfs_del_root(struct btrfs_root *root);
1663 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1666 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1667 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1668 struct btrfs_root *root, struct inode *inode);
1670 u64 btrfs_parse_size(char *str);
1671 int btrfs_parse_options(struct btrfs_root *root, char *options);
1672 int btrfs_sync_fs(struct super_block *sb, int wait);