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"
46 # define BTRFS_MAX_LEVEL 7
48 # define BTRFS_MAX_LEVEL 8
51 /* holds pointers to all of the tree roots */
52 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
54 /* stores information about which extents are in use, and reference counts */
55 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
58 * chunk tree stores translations from logical -> physical block numbering
59 * the super block points to the chunk tree
61 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
64 * stores information about which areas of a given device are in use.
65 * one per device. The tree of tree roots points to the device tree
67 #define BTRFS_DEV_TREE_OBJECTID 4ULL
69 /* one per subvolume, storing files and directories */
70 #define BTRFS_FS_TREE_OBJECTID 5ULL
72 /* directory objectid inside the root tree */
73 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
76 * All files have objectids higher than this.
78 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
79 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
83 * the device items go into the chunk tree. The key is in the form
84 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
86 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
89 * we can actually store much bigger names, but lets not confuse the rest
92 #define BTRFS_NAME_LEN 255
94 /* 32 bytes in various csum fields */
95 #define BTRFS_CSUM_SIZE 32
96 /* four bytes for CRC32 */
97 #define BTRFS_CRC32_SIZE 4
98 #define BTRFS_EMPTY_DIR_SIZE 0
100 #define BTRFS_FT_UNKNOWN 0
101 #define BTRFS_FT_REG_FILE 1
102 #define BTRFS_FT_DIR 2
103 #define BTRFS_FT_CHRDEV 3
104 #define BTRFS_FT_BLKDEV 4
105 #define BTRFS_FT_FIFO 5
106 #define BTRFS_FT_SOCK 6
107 #define BTRFS_FT_SYMLINK 7
108 #define BTRFS_FT_XATTR 8
109 #define BTRFS_FT_MAX 9
112 * the key defines the order in the tree, and so it also defines (optimal)
113 * block layout. objectid corresonds to the inode number. The flags
114 * tells us things about the object, and is a kind of stream selector.
115 * so for a given inode, keys with flags of 1 might refer to the inode
116 * data, flags of 2 may point to file data in the btree and flags == 3
117 * may point to extents.
119 * offset is the starting byte offset for this key in the stream.
121 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
122 * in cpu native order. Otherwise they are identical and their sizes
123 * should be the same (ie both packed)
125 struct btrfs_disk_key {
129 } __attribute__ ((__packed__));
135 } __attribute__ ((__packed__));
137 struct btrfs_mapping_tree {
138 struct extent_map_tree map_tree;
141 #define BTRFS_UUID_SIZE 16
142 struct btrfs_dev_item {
143 /* the internal btrfs device id */
146 /* size of the device */
152 /* optimal io alignment for this device */
155 /* optimal io width for this device */
158 /* minimal io size for this device */
161 /* type and info about this device */
164 /* grouping information for allocation decisions */
167 /* seek speed 0-100 where 100 is fastest */
170 /* bandwidth 0-100 where 100 is fastest */
173 /* btrfs generated uuid for this device */
174 u8 uuid[BTRFS_UUID_SIZE];
175 } __attribute__ ((__packed__));
177 struct btrfs_stripe {
180 u8 dev_uuid[BTRFS_UUID_SIZE];
181 } __attribute__ ((__packed__));
184 /* size of this chunk in bytes */
187 /* objectid of the root referencing this chunk */
193 /* optimal io alignment for this chunk */
196 /* optimal io width for this chunk */
199 /* minimal io size for this chunk */
202 /* 2^16 stripes is quite a lot, a second limit is the size of a single
207 /* sub stripes only matter for raid10 */
209 struct btrfs_stripe stripe;
210 /* additional stripes go here */
211 } __attribute__ ((__packed__));
213 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
215 BUG_ON(num_stripes == 0);
216 return sizeof(struct btrfs_chunk) +
217 sizeof(struct btrfs_stripe) * (num_stripes - 1);
220 #define BTRFS_FSID_SIZE 16
221 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
224 * every tree block (leaf or node) starts with this header.
226 struct btrfs_header {
227 /* these first four must match the super block */
228 u8 csum[BTRFS_CSUM_SIZE];
229 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
230 __le64 bytenr; /* which block this node is supposed to live in */
233 /* allowed to be different from the super from here on down */
234 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
239 } __attribute__ ((__packed__));
241 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
242 sizeof(struct btrfs_header)) / \
243 sizeof(struct btrfs_key_ptr))
244 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
245 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
246 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
247 sizeof(struct btrfs_item) - \
248 sizeof(struct btrfs_file_extent_item))
252 * this is a very generous portion of the super block, giving us
253 * room to translate 14 chunks with 3 stripes each.
255 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
256 #define BTRFS_LABEL_SIZE 256
259 * the super block basically lists the main trees of the FS
260 * it currently lacks any block count etc etc
262 struct btrfs_super_block {
263 u8 csum[BTRFS_CSUM_SIZE];
264 /* the first 4 fields must match struct btrfs_header */
265 u8 fsid[16]; /* FS specific uuid */
266 __le64 bytenr; /* this block number */
269 /* allowed to be different from the btrfs_header from here own down */
276 __le64 root_dir_objectid;
282 __le32 sys_chunk_array_size;
285 struct btrfs_dev_item dev_item;
286 char label[BTRFS_LABEL_SIZE];
287 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
288 } __attribute__ ((__packed__));
291 * A leaf is full of items. offset and size tell us where to find
292 * the item in the leaf (relative to the start of the data area)
295 struct btrfs_disk_key key;
298 } __attribute__ ((__packed__));
301 * leaves have an item area and a data area:
302 * [item0, item1....itemN] [free space] [dataN...data1, data0]
304 * The data is separate from the items to get the keys closer together
308 struct btrfs_header header;
309 struct btrfs_item items[];
310 } __attribute__ ((__packed__));
313 * all non-leaf blocks are nodes, they hold only keys and pointers to
316 struct btrfs_key_ptr {
317 struct btrfs_disk_key key;
320 } __attribute__ ((__packed__));
323 struct btrfs_header header;
324 struct btrfs_key_ptr ptrs[];
325 } __attribute__ ((__packed__));
328 * btrfs_paths remember the path taken from the root down to the leaf.
329 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
330 * to any other levels that are present.
332 * The slots array records the index of the item or block pointer
333 * used while walking the tree.
336 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
337 int slots[BTRFS_MAX_LEVEL];
338 /* if there is real range locking, this locks field will change */
339 int locks[BTRFS_MAX_LEVEL];
341 /* keep some upper locks as we walk down */
348 * items in the extent btree are used to record the objectid of the
349 * owner of the block and the number of references
351 struct btrfs_extent_item {
353 } __attribute__ ((__packed__));
355 struct btrfs_extent_ref {
360 } __attribute__ ((__packed__));
362 /* dev extents record free space on individual devices. The owner
363 * field points back to the chunk allocation mapping tree that allocated
364 * the extent. The chunk tree uuid field is a way to double check the owner
366 struct btrfs_dev_extent {
368 __le64 chunk_objectid;
371 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
372 } __attribute__ ((__packed__));
374 struct btrfs_inode_ref {
377 } __attribute__ ((__packed__));
379 struct btrfs_timespec {
382 } __attribute__ ((__packed__));
385 * there is no padding here on purpose. If you want to extent the inode,
386 * make a new item type
388 struct btrfs_inode_item {
400 struct btrfs_timespec atime;
401 struct btrfs_timespec ctime;
402 struct btrfs_timespec mtime;
403 struct btrfs_timespec otime;
404 } __attribute__ ((__packed__));
406 struct btrfs_dir_item {
407 struct btrfs_disk_key location;
411 } __attribute__ ((__packed__));
413 struct btrfs_root_item {
414 struct btrfs_inode_item inode;
421 struct btrfs_disk_key drop_progress;
424 } __attribute__ ((__packed__));
426 #define BTRFS_FILE_EXTENT_REG 0
427 #define BTRFS_FILE_EXTENT_INLINE 1
429 struct btrfs_file_extent_item {
433 * disk space consumed by the extent, checksum blocks are included
437 __le64 disk_num_bytes;
439 * the logical offset in file blocks (no csums)
440 * this extent record is for. This allows a file extent to point
441 * into the middle of an existing extent on disk, sharing it
442 * between two snapshots (useful if some bytes in the middle of the
443 * extent have changed
447 * the logical number of file blocks (no csums included)
450 } __attribute__ ((__packed__));
452 struct btrfs_csum_item {
454 } __attribute__ ((__packed__));
456 /* different types of block groups (and chunks) */
457 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
458 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
459 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
460 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
461 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
462 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
463 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
466 struct btrfs_block_group_item {
468 __le64 chunk_objectid;
470 } __attribute__ ((__packed__));
472 struct btrfs_space_info {
479 struct list_head list;
482 struct btrfs_block_group_cache {
483 struct btrfs_key key;
484 struct btrfs_block_group_item item;
485 struct btrfs_space_info *space_info;
494 struct btrfs_fs_devices;
495 struct btrfs_fs_info {
496 u8 fsid[BTRFS_FSID_SIZE];
497 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
498 struct btrfs_root *extent_root;
499 struct btrfs_root *tree_root;
500 struct btrfs_root *chunk_root;
501 struct btrfs_root *dev_root;
502 struct radix_tree_root fs_roots_radix;
504 struct extent_io_tree free_space_cache;
505 struct extent_io_tree block_group_cache;
506 struct extent_io_tree pinned_extents;
507 struct extent_io_tree pending_del;
508 struct extent_io_tree extent_ins;
510 /* logical->physical extent mapping */
511 struct btrfs_mapping_tree mapping_tree;
514 u64 last_trans_committed;
515 unsigned long mount_opt;
519 struct btrfs_transaction *running_transaction;
520 wait_queue_head_t transaction_throttle;
521 wait_queue_head_t transaction_wait;
522 struct btrfs_super_block super_copy;
523 struct btrfs_super_block super_for_commit;
524 struct block_device *__bdev;
525 struct super_block *sb;
526 struct inode *btree_inode;
527 struct backing_dev_info bdi;
528 spinlock_t hash_lock;
529 struct mutex trans_mutex;
530 struct mutex transaction_kthread_mutex;
531 struct mutex cleaner_mutex;
532 struct mutex alloc_mutex;
533 struct mutex chunk_mutex;
534 struct mutex drop_mutex;
535 struct mutex volume_mutex;
536 struct list_head trans_list;
537 struct list_head hashers;
538 struct list_head dead_roots;
539 atomic_t nr_async_submits;
542 * there is a pool of worker threads for checksumming during writes
543 * and a pool for checksumming after reads. This is because readers
544 * can run with FS locks held, and the writers may be waiting for
545 * those locks. We don't want ordering in the pending list to cause
546 * deadlocks, and so the two are serviced separately.
548 * A third pool does submit_bio to avoid deadlocking with the other
551 struct btrfs_workers workers;
552 struct btrfs_workers endio_workers;
553 struct btrfs_workers endio_write_workers;
554 struct btrfs_workers submit_workers;
556 * fixup workers take dirty pages that didn't properly go through
557 * the cow mechanism and make them safe to write. It happens
558 * for the sys_munmap function call path
560 struct btrfs_workers fixup_workers;
561 struct task_struct *transaction_kthread;
562 struct task_struct *cleaner_kthread;
563 int thread_pool_size;
565 struct kobject super_kobj;
566 struct completion kobj_unregister;
572 struct list_head dirty_cowonly_roots;
574 struct btrfs_fs_devices *fs_devices;
575 struct list_head space_info;
576 spinlock_t delalloc_lock;
577 spinlock_t new_trans_lock;
582 u64 avail_data_alloc_bits;
583 u64 avail_metadata_alloc_bits;
584 u64 avail_system_alloc_bits;
585 u64 data_alloc_profile;
586 u64 metadata_alloc_profile;
587 u64 system_alloc_profile;
593 * in ram representation of the tree. extent_root is used for all allocations
594 * and for the extent tree extent_root root.
597 struct extent_buffer *node;
599 /* the node lock is held while changing the node pointer */
600 spinlock_t node_lock;
602 struct extent_buffer *commit_root;
603 struct btrfs_root_item root_item;
604 struct btrfs_key root_key;
605 struct btrfs_fs_info *fs_info;
607 struct kobject root_kobj;
608 struct completion kobj_unregister;
609 struct mutex objectid_mutex;
613 /* data allocations are done in sectorsize units */
616 /* node allocations are done in nodesize units */
619 /* leaf allocations are done in leafsize units */
626 u64 last_inode_alloc;
629 u64 defrag_trans_start;
630 struct btrfs_key defrag_progress;
631 struct btrfs_key defrag_max;
637 /* the dirty list is only used by non-reference counted roots */
638 struct list_head dirty_list;
643 * inode items have the data typically returned from stat and store other
644 * info about object characteristics. There is one for every file and dir in
647 #define BTRFS_INODE_ITEM_KEY 1
648 #define BTRFS_INODE_REF_KEY 2
649 #define BTRFS_XATTR_ITEM_KEY 8
650 /* reserve 2-15 close to the inode for later flexibility */
653 * dir items are the name -> inode pointers in a directory. There is one
654 * for every name in a directory.
656 #define BTRFS_DIR_ITEM_KEY 16
657 #define BTRFS_DIR_INDEX_KEY 17
659 * extent data is for file data
661 #define BTRFS_EXTENT_DATA_KEY 18
663 * csum items have the checksums for data in the extents
665 #define BTRFS_CSUM_ITEM_KEY 19
667 /* reserve 20-31 for other file stuff */
670 * root items point to tree roots. There are typically in the root
671 * tree used by the super block to find all the other trees
673 #define BTRFS_ROOT_ITEM_KEY 32
675 * extent items are in the extent map tree. These record which blocks
676 * are used, and how many references there are to each block
678 #define BTRFS_EXTENT_ITEM_KEY 33
679 #define BTRFS_EXTENT_REF_KEY 34
682 * block groups give us hints into the extent allocation trees. Which
683 * blocks are free etc etc
685 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
687 #define BTRFS_DEV_EXTENT_KEY 75
688 #define BTRFS_DEV_ITEM_KEY 76
689 #define BTRFS_CHUNK_ITEM_KEY 77
692 * string items are for debugging. They just store a short string of
695 #define BTRFS_STRING_ITEM_KEY 253
697 #define BTRFS_MOUNT_NODATASUM (1 << 0)
698 #define BTRFS_MOUNT_NODATACOW (1 << 1)
699 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
700 #define BTRFS_MOUNT_SSD (1 << 3)
701 #define BTRFS_MOUNT_DEGRADED (1 << 4)
703 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
704 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
705 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
710 #define BTRFS_INODE_NODATASUM (1 << 0)
711 #define BTRFS_INODE_NODATACOW (1 << 1)
712 #define BTRFS_INODE_READONLY (1 << 2)
713 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
715 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
717 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
719 /* some macros to generate set/get funcs for the struct fields. This
720 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
723 #define le8_to_cpu(v) (v)
724 #define cpu_to_le8(v) (v)
727 #define read_eb_member(eb, ptr, type, member, result) ( \
728 read_extent_buffer(eb, (char *)(result), \
729 ((unsigned long)(ptr)) + \
730 offsetof(type, member), \
731 sizeof(((type *)0)->member)))
733 #define write_eb_member(eb, ptr, type, member, result) ( \
734 write_extent_buffer(eb, (char *)(result), \
735 ((unsigned long)(ptr)) + \
736 offsetof(type, member), \
737 sizeof(((type *)0)->member)))
739 #ifndef BTRFS_SETGET_FUNCS
740 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
741 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
742 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
745 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
746 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
748 type *p = kmap_atomic(eb->first_page, KM_USER0); \
749 u##bits res = le##bits##_to_cpu(p->member); \
750 kunmap_atomic(p, KM_USER0); \
753 static inline void btrfs_set_##name(struct extent_buffer *eb, \
756 type *p = kmap_atomic(eb->first_page, KM_USER0); \
757 p->member = cpu_to_le##bits(val); \
758 kunmap_atomic(p, KM_USER0); \
761 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
762 static inline u##bits btrfs_##name(type *s) \
764 return le##bits##_to_cpu(s->member); \
766 static inline void btrfs_set_##name(type *s, u##bits val) \
768 s->member = cpu_to_le##bits(val); \
771 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
772 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
773 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
774 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
775 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
776 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
777 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
778 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
779 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
780 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
782 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
783 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
785 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
787 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
789 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
791 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
793 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
794 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
796 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
798 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
801 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
803 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
806 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
807 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
808 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
809 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
810 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
811 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
812 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
813 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
814 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
815 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
816 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
818 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
820 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
823 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
824 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
825 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
827 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
829 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
831 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
833 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
834 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
836 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
838 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
839 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
841 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
844 unsigned long offset = (unsigned long)c;
845 offset += offsetof(struct btrfs_chunk, stripe);
846 offset += nr * sizeof(struct btrfs_stripe);
847 return (struct btrfs_stripe *)offset;
850 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
852 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
855 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
856 struct btrfs_chunk *c, int nr)
858 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
861 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
862 struct btrfs_chunk *c, int nr,
865 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
868 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
869 struct btrfs_chunk *c, int nr)
871 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
874 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
875 struct btrfs_chunk *c, int nr,
878 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
881 /* struct btrfs_block_group_item */
882 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
884 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
886 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
887 struct btrfs_block_group_item, chunk_objectid, 64);
889 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
890 struct btrfs_block_group_item, chunk_objectid, 64);
891 BTRFS_SETGET_FUNCS(disk_block_group_flags,
892 struct btrfs_block_group_item, flags, 64);
893 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
894 struct btrfs_block_group_item, flags, 64);
896 /* struct btrfs_inode_ref */
897 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
899 /* struct btrfs_inode_item */
900 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
901 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
902 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
903 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
904 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
905 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
906 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
907 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
908 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
909 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
910 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
913 static inline struct btrfs_timespec *
914 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
916 unsigned long ptr = (unsigned long)inode_item;
917 ptr += offsetof(struct btrfs_inode_item, atime);
918 return (struct btrfs_timespec *)ptr;
921 static inline struct btrfs_timespec *
922 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
924 unsigned long ptr = (unsigned long)inode_item;
925 ptr += offsetof(struct btrfs_inode_item, mtime);
926 return (struct btrfs_timespec *)ptr;
929 static inline struct btrfs_timespec *
930 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
932 unsigned long ptr = (unsigned long)inode_item;
933 ptr += offsetof(struct btrfs_inode_item, ctime);
934 return (struct btrfs_timespec *)ptr;
937 static inline struct btrfs_timespec *
938 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
940 unsigned long ptr = (unsigned long)inode_item;
941 ptr += offsetof(struct btrfs_inode_item, otime);
942 return (struct btrfs_timespec *)ptr;
945 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
946 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
948 /* struct btrfs_extent_item */
949 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
951 /* struct btrfs_dev_extent */
952 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
954 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
956 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
958 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
960 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
962 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
963 return (u8 *)((unsigned long)dev + ptr);
966 /* struct btrfs_extent_ref */
967 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
968 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
969 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
970 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
972 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
973 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
975 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
977 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
979 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
982 /* struct btrfs_node */
983 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
984 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
986 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
989 ptr = offsetof(struct btrfs_node, ptrs) +
990 sizeof(struct btrfs_key_ptr) * nr;
991 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
994 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
998 ptr = offsetof(struct btrfs_node, ptrs) +
999 sizeof(struct btrfs_key_ptr) * nr;
1000 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1003 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1006 ptr = offsetof(struct btrfs_node, ptrs) +
1007 sizeof(struct btrfs_key_ptr) * nr;
1008 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1011 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1015 ptr = offsetof(struct btrfs_node, ptrs) +
1016 sizeof(struct btrfs_key_ptr) * nr;
1017 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1020 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1022 return offsetof(struct btrfs_node, ptrs) +
1023 sizeof(struct btrfs_key_ptr) * nr;
1026 void btrfs_node_key(struct extent_buffer *eb,
1027 struct btrfs_disk_key *disk_key, int nr);
1029 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1030 struct btrfs_disk_key *disk_key, int nr)
1033 ptr = btrfs_node_key_ptr_offset(nr);
1034 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1035 struct btrfs_key_ptr, key, disk_key);
1038 /* struct btrfs_item */
1039 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1040 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1042 static inline unsigned long btrfs_item_nr_offset(int nr)
1044 return offsetof(struct btrfs_leaf, items) +
1045 sizeof(struct btrfs_item) * nr;
1048 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1051 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1054 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1055 struct btrfs_item *item)
1057 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1060 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1062 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1065 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1067 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1070 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1072 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1075 static inline void btrfs_item_key(struct extent_buffer *eb,
1076 struct btrfs_disk_key *disk_key, int nr)
1078 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1079 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1082 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1083 struct btrfs_disk_key *disk_key, int nr)
1085 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1086 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1089 /* struct btrfs_dir_item */
1090 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1091 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1092 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1094 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1095 struct btrfs_dir_item *item,
1096 struct btrfs_disk_key *key)
1098 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1101 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1102 struct btrfs_dir_item *item,
1103 struct btrfs_disk_key *key)
1105 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1108 /* struct btrfs_disk_key */
1109 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1111 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1112 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1114 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1115 struct btrfs_disk_key *disk)
1117 cpu->offset = le64_to_cpu(disk->offset);
1118 cpu->type = disk->type;
1119 cpu->objectid = le64_to_cpu(disk->objectid);
1122 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1123 struct btrfs_key *cpu)
1125 disk->offset = cpu_to_le64(cpu->offset);
1126 disk->type = cpu->type;
1127 disk->objectid = cpu_to_le64(cpu->objectid);
1130 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1131 struct btrfs_key *key, int nr)
1133 struct btrfs_disk_key disk_key;
1134 btrfs_node_key(eb, &disk_key, nr);
1135 btrfs_disk_key_to_cpu(key, &disk_key);
1138 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1139 struct btrfs_key *key, int nr)
1141 struct btrfs_disk_key disk_key;
1142 btrfs_item_key(eb, &disk_key, nr);
1143 btrfs_disk_key_to_cpu(key, &disk_key);
1146 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1147 struct btrfs_dir_item *item,
1148 struct btrfs_key *key)
1150 struct btrfs_disk_key disk_key;
1151 btrfs_dir_item_key(eb, item, &disk_key);
1152 btrfs_disk_key_to_cpu(key, &disk_key);
1156 static inline u8 btrfs_key_type(struct btrfs_key *key)
1161 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1166 /* struct btrfs_header */
1167 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1168 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1170 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1171 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1172 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1173 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1175 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1177 return (btrfs_header_flags(eb) & flag) == flag;
1180 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1182 u64 flags = btrfs_header_flags(eb);
1183 btrfs_set_header_flags(eb, flags | flag);
1184 return (flags & flag) == flag;
1187 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1189 u64 flags = btrfs_header_flags(eb);
1190 btrfs_set_header_flags(eb, flags & ~flag);
1191 return (flags & flag) == flag;
1194 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1196 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1200 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1202 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1206 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1208 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1212 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1214 unsigned long ptr = offsetof(struct btrfs_header, csum);
1218 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1223 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1228 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1233 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1235 return (btrfs_header_level(eb) == 0);
1238 /* struct btrfs_root_item */
1239 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1240 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1241 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1243 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1244 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1245 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1246 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1247 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1248 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1249 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1251 /* struct btrfs_super_block */
1252 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1253 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1254 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1256 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1257 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1258 struct btrfs_super_block, sys_chunk_array_size, 32);
1259 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1261 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1263 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1264 chunk_root_level, 64);
1265 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1267 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1269 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1271 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1273 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1275 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1277 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1278 root_dir_objectid, 64);
1279 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1282 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1284 return offsetof(struct btrfs_leaf, items);
1287 /* struct btrfs_file_extent_item */
1288 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1290 static inline unsigned long btrfs_file_extent_inline_start(struct
1291 btrfs_file_extent_item *e)
1293 unsigned long offset = (unsigned long)e;
1294 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1298 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1300 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1303 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1304 struct btrfs_item *e)
1306 unsigned long offset;
1307 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1308 return btrfs_item_size(eb, e) - offset;
1311 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1313 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1315 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1316 disk_num_bytes, 64);
1317 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1319 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1322 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1324 return sb->s_fs_info;
1327 static inline int btrfs_set_root_name(struct btrfs_root *root,
1328 const char *name, int len)
1330 /* if we already have a name just free it */
1334 root->name = kmalloc(len+1, GFP_KERNEL);
1338 memcpy(root->name, name, len);
1339 root->name[len] ='\0';
1344 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1346 return root->leafsize;
1347 return root->nodesize;
1350 /* helper function to cast into the data area of the leaf. */
1351 #define btrfs_item_ptr(leaf, slot, type) \
1352 ((type *)(btrfs_leaf_data(leaf) + \
1353 btrfs_item_offset_nr(leaf, slot)))
1355 #define btrfs_item_ptr_offset(leaf, slot) \
1356 ((unsigned long)(btrfs_leaf_data(leaf) + \
1357 btrfs_item_offset_nr(leaf, slot)))
1359 static inline struct dentry *fdentry(struct file *file) {
1360 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1361 return file->f_dentry;
1363 return file->f_path.dentry;
1368 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1369 struct btrfs_path *count_path,
1370 u64 expected_owner, u64 first_extent);
1371 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1372 struct btrfs_root *root);
1373 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1374 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1375 btrfs_fs_info *info,
1377 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1378 struct btrfs_block_group_cache
1379 *hint, u64 search_start,
1380 int data, int owner);
1381 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1382 struct btrfs_root *root,
1390 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1391 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1392 struct btrfs_root *root,
1393 struct btrfs_path *path, u64 bytenr,
1394 u64 root_objectid, u64 ref_generation,
1395 u64 owner, u64 owner_offset);
1396 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1397 struct btrfs_root *root,
1398 u64 num_bytes, u64 min_bytes,
1399 u64 root_objectid, u64 ref_generation,
1400 u64 owner, u64 owner_offset,
1401 u64 empty_size, u64 hint_byte,
1402 u64 search_end, struct btrfs_key *ins, u64 data);
1403 int btrfs_alloc_reserved_extent(struct btrfs_trans_handle *trans,
1404 struct btrfs_root *root,
1405 u64 root_objectid, u64 ref_generation,
1406 u64 owner, u64 owner_offset,
1407 struct btrfs_key *ins);
1408 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
1409 struct btrfs_root *root,
1410 u64 num_bytes, u64 min_alloc_size,
1411 u64 empty_size, u64 hint_byte,
1412 u64 search_end, struct btrfs_key *ins,
1414 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1415 struct extent_buffer *buf);
1416 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1417 *root, u64 bytenr, u64 num_bytes,
1418 u64 root_objectid, u64 ref_generation,
1419 u64 owner_objectid, u64 owner_offset, int pin);
1420 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1421 struct btrfs_root *root,
1422 struct extent_io_tree *unpin);
1423 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1424 struct btrfs_root *root,
1425 u64 bytenr, u64 num_bytes,
1426 u64 root_objectid, u64 ref_generation,
1427 u64 owner, u64 owner_offset);
1428 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1429 struct btrfs_root *root);
1430 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1431 int btrfs_read_block_groups(struct btrfs_root *root);
1432 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1433 struct btrfs_root *root, u64 bytes_used,
1434 u64 type, u64 chunk_objectid, u64 chunk_offset,
1437 int btrfs_previous_item(struct btrfs_root *root,
1438 struct btrfs_path *path, u64 min_objectid,
1441 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1442 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1443 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
1444 struct btrfs_key *key, int lowest_level,
1445 int cache_only, u64 min_trans);
1446 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
1447 struct btrfs_path *path, int cache_only,
1450 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1451 struct btrfs_root *root, struct extent_buffer *buf,
1452 struct extent_buffer *parent, int parent_slot,
1453 struct extent_buffer **cow_ret);
1454 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1455 struct btrfs_root *root,
1456 struct extent_buffer *buf,
1457 struct extent_buffer **cow_ret, u64 new_root_objectid);
1458 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1459 *root, struct btrfs_path *path, u32 data_size);
1460 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1461 struct btrfs_root *root,
1462 struct btrfs_path *path,
1463 u32 new_size, int from_end);
1464 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1465 *root, struct btrfs_key *key, struct btrfs_path *p, int
1467 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1468 struct btrfs_root *root, struct extent_buffer *parent,
1469 int start_slot, int cache_only, u64 *last_ret,
1470 struct btrfs_key *progress);
1471 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1472 struct btrfs_path *btrfs_alloc_path(void);
1473 void btrfs_free_path(struct btrfs_path *p);
1474 void btrfs_init_path(struct btrfs_path *p);
1475 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1476 struct btrfs_path *path, int slot, int nr);
1478 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1479 struct btrfs_root *root,
1480 struct btrfs_path *path)
1482 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1485 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1486 *root, struct btrfs_key *key, void *data, u32 data_size);
1487 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1488 struct btrfs_root *root,
1489 struct btrfs_path *path,
1490 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1492 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1493 struct btrfs_root *root,
1494 struct btrfs_path *path,
1495 struct btrfs_key *key,
1498 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1501 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1502 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1503 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1504 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1507 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1508 struct btrfs_key *key);
1509 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1510 *root, struct btrfs_key *key, struct btrfs_root_item
1512 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1513 *root, struct btrfs_key *key, struct btrfs_root_item
1515 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1516 btrfs_root_item *item, struct btrfs_key *key);
1517 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1518 u64 *found_objectid);
1519 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1520 struct btrfs_root *latest_root);
1522 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1523 *root, const char *name, int name_len, u64 dir,
1524 struct btrfs_key *location, u8 type);
1525 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1526 struct btrfs_root *root,
1527 struct btrfs_path *path, u64 dir,
1528 const char *name, int name_len,
1530 struct btrfs_dir_item *
1531 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1532 struct btrfs_root *root,
1533 struct btrfs_path *path, u64 dir,
1534 u64 objectid, const char *name, int name_len,
1536 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1537 struct btrfs_path *path,
1538 const char *name, int name_len);
1539 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1540 struct btrfs_root *root,
1541 struct btrfs_path *path,
1542 struct btrfs_dir_item *di);
1543 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1544 struct btrfs_root *root, const char *name,
1545 u16 name_len, const void *data, u16 data_len,
1547 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1548 struct btrfs_root *root,
1549 struct btrfs_path *path, u64 dir,
1550 const char *name, u16 name_len,
1553 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1554 struct btrfs_root *fs_root,
1555 u64 dirid, u64 *objectid);
1556 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1559 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1560 struct btrfs_root *root,
1561 const char *name, int name_len,
1562 u64 inode_objectid, u64 ref_objectid);
1563 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1564 struct btrfs_root *root,
1565 const char *name, int name_len,
1566 u64 inode_objectid, u64 ref_objectid);
1567 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1568 struct btrfs_root *root,
1569 struct btrfs_path *path, u64 objectid);
1570 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1571 *root, struct btrfs_path *path,
1572 struct btrfs_key *location, int mod);
1575 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1576 struct btrfs_root *root,
1577 u64 objectid, u64 pos, u64 disk_offset,
1579 u64 num_bytes, u64 offset);
1580 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1581 struct btrfs_root *root,
1582 struct btrfs_path *path, u64 objectid,
1583 u64 bytenr, int mod);
1584 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1585 struct btrfs_root *root, struct inode *inode,
1586 struct btrfs_ordered_sum *sums);
1587 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
1589 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1590 struct btrfs_root *root,
1591 struct btrfs_path *path,
1592 u64 objectid, u64 offset,
1594 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1595 struct btrfs_root *root, struct btrfs_path *path,
1599 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
1600 #ifdef ClearPageFsMisc
1601 #define ClearPageChecked ClearPageFsMisc
1602 #define SetPageChecked SetPageFsMisc
1603 #define PageChecked PageFsMisc
1606 int btrfs_writepages(struct address_space *mapping,
1607 struct writeback_control *wbc);
1608 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1609 struct btrfs_trans_handle *trans, u64 new_dirid,
1610 struct btrfs_block_group_cache *block_group);
1612 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1615 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1616 size_t size, struct bio *bio);
1618 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1621 if (dec <= inode->i_blocks)
1622 inode->i_blocks -= dec;
1624 inode->i_blocks = 0;
1627 unsigned long btrfs_force_ra(struct address_space *mapping,
1628 struct file_ra_state *ra, struct file *file,
1629 pgoff_t offset, pgoff_t last_index);
1630 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1632 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1633 int btrfs_readpage(struct file *file, struct page *page);
1634 void btrfs_delete_inode(struct inode *inode);
1635 void btrfs_put_inode(struct inode *inode);
1636 void btrfs_read_locked_inode(struct inode *inode);
1637 int btrfs_write_inode(struct inode *inode, int wait);
1638 void btrfs_dirty_inode(struct inode *inode);
1639 struct inode *btrfs_alloc_inode(struct super_block *sb);
1640 void btrfs_destroy_inode(struct inode *inode);
1641 int btrfs_init_cachep(void);
1642 void btrfs_destroy_cachep(void);
1643 long btrfs_ioctl_trans_end(struct file *file);
1644 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1645 struct btrfs_root *root);
1646 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1648 int btrfs_commit_write(struct file *file, struct page *page,
1649 unsigned from, unsigned to);
1650 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1651 size_t page_offset, u64 start, u64 end,
1653 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1654 struct btrfs_root *root,
1655 struct inode *inode);
1658 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1661 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1662 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1663 extern struct file_operations btrfs_file_operations;
1664 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1665 struct btrfs_root *root, struct inode *inode,
1666 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1667 int btrfs_release_file(struct inode *inode, struct file *file);
1670 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1671 struct btrfs_root *root, int cache_only);
1674 int btrfs_init_sysfs(void);
1675 void btrfs_exit_sysfs(void);
1676 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1677 int btrfs_sysfs_add_root(struct btrfs_root *root);
1678 void btrfs_sysfs_del_root(struct btrfs_root *root);
1679 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1682 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1683 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1684 struct btrfs_root *root, struct inode *inode);
1686 u64 btrfs_parse_size(char *str);
1687 int btrfs_parse_options(struct btrfs_root *root, char *options);
1688 int btrfs_sync_fs(struct super_block *sb, int wait);