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/workqueue.h>
27 #include <linux/completion.h>
28 #include <linux/backing-dev.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;
42 #define BTRFS_MAGIC "_B5RfS_M"
44 #define BTRFS_MAX_LEVEL 8
46 /* holds pointers to all of the tree roots */
47 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
49 /* stores information about which extents are in use, and reference counts */
50 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
53 * chunk tree stores translations from logical -> physical block numbering
54 * the super block points to the chunk tree
56 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
59 * stores information about which areas of a given device are in use.
60 * one per device. The tree of tree roots points to the device tree
62 #define BTRFS_DEV_TREE_OBJECTID 4ULL
64 /* one per subvolume, storing files and directories */
65 #define BTRFS_FS_TREE_OBJECTID 5ULL
67 /* directory objectid inside the root tree */
68 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
71 * All files have objectids higher than this.
73 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
74 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
78 * the device items go into the chunk tree. The key is in the form
79 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
81 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
84 * we can actually store much bigger names, but lets not confuse the rest
87 #define BTRFS_NAME_LEN 255
89 /* 32 bytes in various csum fields */
90 #define BTRFS_CSUM_SIZE 32
91 /* four bytes for CRC32 */
92 #define BTRFS_CRC32_SIZE 4
93 #define BTRFS_EMPTY_DIR_SIZE 0
95 #define BTRFS_FT_UNKNOWN 0
96 #define BTRFS_FT_REG_FILE 1
97 #define BTRFS_FT_DIR 2
98 #define BTRFS_FT_CHRDEV 3
99 #define BTRFS_FT_BLKDEV 4
100 #define BTRFS_FT_FIFO 5
101 #define BTRFS_FT_SOCK 6
102 #define BTRFS_FT_SYMLINK 7
103 #define BTRFS_FT_XATTR 8
104 #define BTRFS_FT_MAX 9
107 * the key defines the order in the tree, and so it also defines (optimal)
108 * block layout. objectid corresonds to the inode number. The flags
109 * tells us things about the object, and is a kind of stream selector.
110 * so for a given inode, keys with flags of 1 might refer to the inode
111 * data, flags of 2 may point to file data in the btree and flags == 3
112 * may point to extents.
114 * offset is the starting byte offset for this key in the stream.
116 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
117 * in cpu native order. Otherwise they are identical and their sizes
118 * should be the same (ie both packed)
120 struct btrfs_disk_key {
124 } __attribute__ ((__packed__));
130 } __attribute__ ((__packed__));
132 struct btrfs_mapping_tree {
133 struct extent_map_tree map_tree;
136 #define BTRFS_UUID_SIZE 16
137 struct btrfs_dev_item {
138 /* the internal btrfs device id */
141 /* size of the device */
147 /* optimal io alignment for this device */
150 /* optimal io width for this device */
153 /* minimal io size for this device */
156 /* type and info about this device */
159 /* grouping information for allocation decisions */
162 /* seek speed 0-100 where 100 is fastest */
165 /* bandwidth 0-100 where 100 is fastest */
168 /* btrfs generated uuid for this device */
169 u8 uuid[BTRFS_UUID_SIZE];
170 } __attribute__ ((__packed__));
172 struct btrfs_stripe {
175 u8 dev_uuid[BTRFS_UUID_SIZE];
176 } __attribute__ ((__packed__));
179 /* size of this chunk in bytes */
182 /* objectid of the root referencing this chunk */
188 /* optimal io alignment for this chunk */
191 /* optimal io width for this chunk */
194 /* minimal io size for this chunk */
197 /* 2^16 stripes is quite a lot, a second limit is the size of a single
202 /* sub stripes only matter for raid10 */
204 struct btrfs_stripe stripe;
205 /* additional stripes go here */
206 } __attribute__ ((__packed__));
208 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
210 BUG_ON(num_stripes == 0);
211 return sizeof(struct btrfs_chunk) +
212 sizeof(struct btrfs_stripe) * (num_stripes - 1);
215 #define BTRFS_FSID_SIZE 16
216 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
219 * every tree block (leaf or node) starts with this header.
221 struct btrfs_header {
222 /* these first four must match the super block */
223 u8 csum[BTRFS_CSUM_SIZE];
224 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
225 __le64 bytenr; /* which block this node is supposed to live in */
228 /* allowed to be different from the super from here on down */
229 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
234 } __attribute__ ((__packed__));
236 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
237 sizeof(struct btrfs_header)) / \
238 sizeof(struct btrfs_key_ptr))
239 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
240 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
241 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
242 sizeof(struct btrfs_item) - \
243 sizeof(struct btrfs_file_extent_item))
247 * this is a very generous portion of the super block, giving us
248 * room to translate 14 chunks with 3 stripes each.
250 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
251 #define BTRFS_LABEL_SIZE 256
254 * the super block basically lists the main trees of the FS
255 * it currently lacks any block count etc etc
257 struct btrfs_super_block {
258 u8 csum[BTRFS_CSUM_SIZE];
259 /* the first 4 fields must match struct btrfs_header */
260 u8 fsid[16]; /* FS specific uuid */
261 __le64 bytenr; /* this block number */
264 /* allowed to be different from the btrfs_header from here own down */
271 __le64 root_dir_objectid;
277 __le32 sys_chunk_array_size;
280 struct btrfs_dev_item dev_item;
281 char label[BTRFS_LABEL_SIZE];
282 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
283 } __attribute__ ((__packed__));
286 * A leaf is full of items. offset and size tell us where to find
287 * the item in the leaf (relative to the start of the data area)
290 struct btrfs_disk_key key;
293 } __attribute__ ((__packed__));
296 * leaves have an item area and a data area:
297 * [item0, item1....itemN] [free space] [dataN...data1, data0]
299 * The data is separate from the items to get the keys closer together
303 struct btrfs_header header;
304 struct btrfs_item items[];
305 } __attribute__ ((__packed__));
308 * all non-leaf blocks are nodes, they hold only keys and pointers to
311 struct btrfs_key_ptr {
312 struct btrfs_disk_key key;
315 } __attribute__ ((__packed__));
318 struct btrfs_header header;
319 struct btrfs_key_ptr ptrs[];
320 } __attribute__ ((__packed__));
323 * btrfs_paths remember the path taken from the root down to the leaf.
324 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
325 * to any other levels that are present.
327 * The slots array records the index of the item or block pointer
328 * used while walking the tree.
331 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
332 int slots[BTRFS_MAX_LEVEL];
333 /* if there is real range locking, this locks field will change */
334 int locks[BTRFS_MAX_LEVEL];
336 /* keep some upper locks as we walk down */
343 * items in the extent btree are used to record the objectid of the
344 * owner of the block and the number of references
346 struct btrfs_extent_item {
348 } __attribute__ ((__packed__));
350 struct btrfs_extent_ref {
355 } __attribute__ ((__packed__));
357 /* dev extents record free space on individual devices. The owner
358 * field points back to the chunk allocation mapping tree that allocated
359 * the extent. The chunk tree uuid field is a way to double check the owner
361 struct btrfs_dev_extent {
363 __le64 chunk_objectid;
366 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
367 } __attribute__ ((__packed__));
369 struct btrfs_inode_ref {
372 } __attribute__ ((__packed__));
374 struct btrfs_timespec {
377 } __attribute__ ((__packed__));
380 * there is no padding here on purpose. If you want to extent the inode,
381 * make a new item type
383 struct btrfs_inode_item {
395 struct btrfs_timespec atime;
396 struct btrfs_timespec ctime;
397 struct btrfs_timespec mtime;
398 struct btrfs_timespec otime;
399 } __attribute__ ((__packed__));
401 struct btrfs_dir_item {
402 struct btrfs_disk_key location;
406 } __attribute__ ((__packed__));
408 struct btrfs_root_item {
409 struct btrfs_inode_item inode;
416 struct btrfs_disk_key drop_progress;
419 } __attribute__ ((__packed__));
421 #define BTRFS_FILE_EXTENT_REG 0
422 #define BTRFS_FILE_EXTENT_INLINE 1
424 struct btrfs_file_extent_item {
428 * disk space consumed by the extent, checksum blocks are included
432 __le64 disk_num_bytes;
434 * the logical offset in file blocks (no csums)
435 * this extent record is for. This allows a file extent to point
436 * into the middle of an existing extent on disk, sharing it
437 * between two snapshots (useful if some bytes in the middle of the
438 * extent have changed
442 * the logical number of file blocks (no csums included)
445 } __attribute__ ((__packed__));
447 struct btrfs_csum_item {
449 } __attribute__ ((__packed__));
451 /* different types of block groups (and chunks) */
452 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
453 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
454 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
455 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
456 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
457 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
458 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
461 struct btrfs_block_group_item {
463 __le64 chunk_objectid;
465 } __attribute__ ((__packed__));
467 struct btrfs_space_info {
474 struct list_head list;
477 struct btrfs_block_group_cache {
478 struct btrfs_key key;
479 struct btrfs_block_group_item item;
480 struct btrfs_space_info *space_info;
488 struct btrfs_fs_devices;
489 struct btrfs_fs_info {
490 u8 fsid[BTRFS_FSID_SIZE];
491 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
492 struct btrfs_root *extent_root;
493 struct btrfs_root *tree_root;
494 struct btrfs_root *chunk_root;
495 struct btrfs_root *dev_root;
496 struct radix_tree_root fs_roots_radix;
498 struct extent_io_tree free_space_cache;
499 struct extent_io_tree block_group_cache;
500 struct extent_io_tree pinned_extents;
501 struct extent_io_tree pending_del;
502 struct extent_io_tree extent_ins;
504 /* logical->physical extent mapping */
505 struct btrfs_mapping_tree mapping_tree;
508 u64 last_trans_committed;
509 unsigned long mount_opt;
513 struct btrfs_transaction *running_transaction;
514 struct btrfs_super_block super_copy;
515 struct btrfs_super_block super_for_commit;
516 struct block_device *__bdev;
517 struct super_block *sb;
518 struct inode *btree_inode;
519 struct backing_dev_info bdi;
520 spinlock_t hash_lock;
521 struct mutex trans_mutex;
522 struct mutex fs_mutex;
523 struct mutex alloc_mutex;
524 struct mutex chunk_mutex;
525 struct list_head trans_list;
526 struct list_head hashers;
527 struct list_head dead_roots;
528 struct list_head end_io_work_list;
529 struct work_struct end_io_work;
530 spinlock_t end_io_work_lock;
531 atomic_t nr_async_submits;
534 * there is a pool of worker threads for checksumming during writes
535 * and a pool for checksumming after reads. This is because readers
536 * can run with FS locks held, and the writers may be waiting for
537 * those locks. We don't want ordering in the pending list to cause
538 * deadlocks, and so the two are serviced separately.
540 * A third pool does submit_bio to avoid deadlocking with the other
543 struct btrfs_workers workers;
544 struct btrfs_workers endio_workers;
545 struct btrfs_workers submit_workers;
546 int thread_pool_size;
548 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
549 struct work_struct trans_work;
551 struct delayed_work trans_work;
553 struct kobject super_kobj;
554 struct completion kobj_unregister;
557 unsigned long throttles;
560 struct list_head dirty_cowonly_roots;
562 struct btrfs_fs_devices *fs_devices;
563 struct list_head space_info;
564 spinlock_t delalloc_lock;
565 spinlock_t new_trans_lock;
570 u64 avail_data_alloc_bits;
571 u64 avail_metadata_alloc_bits;
572 u64 avail_system_alloc_bits;
573 u64 data_alloc_profile;
574 u64 metadata_alloc_profile;
575 u64 system_alloc_profile;
581 * in ram representation of the tree. extent_root is used for all allocations
582 * and for the extent tree extent_root root.
585 struct extent_buffer *node;
587 /* the node lock is held while changing the node pointer */
588 spinlock_t node_lock;
590 struct extent_buffer *commit_root;
591 struct btrfs_root_item root_item;
592 struct btrfs_key root_key;
593 struct btrfs_fs_info *fs_info;
595 struct kobject root_kobj;
596 struct completion kobj_unregister;
600 /* data allocations are done in sectorsize units */
603 /* node allocations are done in nodesize units */
606 /* leaf allocations are done in leafsize units */
613 u64 last_inode_alloc;
616 struct btrfs_key defrag_progress;
617 struct btrfs_key defrag_max;
623 /* the dirty list is only used by non-reference counted roots */
624 struct list_head dirty_list;
629 * inode items have the data typically returned from stat and store other
630 * info about object characteristics. There is one for every file and dir in
633 #define BTRFS_INODE_ITEM_KEY 1
634 #define BTRFS_INODE_REF_KEY 2
635 #define BTRFS_XATTR_ITEM_KEY 8
636 /* reserve 2-15 close to the inode for later flexibility */
639 * dir items are the name -> inode pointers in a directory. There is one
640 * for every name in a directory.
642 #define BTRFS_DIR_ITEM_KEY 16
643 #define BTRFS_DIR_INDEX_KEY 17
645 * extent data is for file data
647 #define BTRFS_EXTENT_DATA_KEY 18
649 * csum items have the checksums for data in the extents
651 #define BTRFS_CSUM_ITEM_KEY 19
653 /* reserve 20-31 for other file stuff */
656 * root items point to tree roots. There are typically in the root
657 * tree used by the super block to find all the other trees
659 #define BTRFS_ROOT_ITEM_KEY 32
661 * extent items are in the extent map tree. These record which blocks
662 * are used, and how many references there are to each block
664 #define BTRFS_EXTENT_ITEM_KEY 33
665 #define BTRFS_EXTENT_REF_KEY 34
668 * block groups give us hints into the extent allocation trees. Which
669 * blocks are free etc etc
671 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
673 #define BTRFS_DEV_EXTENT_KEY 75
674 #define BTRFS_DEV_ITEM_KEY 76
675 #define BTRFS_CHUNK_ITEM_KEY 77
678 * string items are for debugging. They just store a short string of
681 #define BTRFS_STRING_ITEM_KEY 253
683 #define BTRFS_MOUNT_NODATASUM (1 << 0)
684 #define BTRFS_MOUNT_NODATACOW (1 << 1)
685 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
686 #define BTRFS_MOUNT_SSD (1 << 3)
687 #define BTRFS_MOUNT_DEGRADED (1 << 4)
689 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
690 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
691 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
696 #define BTRFS_INODE_NODATASUM (1 << 0)
697 #define BTRFS_INODE_NODATACOW (1 << 1)
698 #define BTRFS_INODE_READONLY (1 << 2)
699 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
701 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
703 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
705 /* some macros to generate set/get funcs for the struct fields. This
706 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
709 #define le8_to_cpu(v) (v)
710 #define cpu_to_le8(v) (v)
713 #define read_eb_member(eb, ptr, type, member, result) ( \
714 read_extent_buffer(eb, (char *)(result), \
715 ((unsigned long)(ptr)) + \
716 offsetof(type, member), \
717 sizeof(((type *)0)->member)))
719 #define write_eb_member(eb, ptr, type, member, result) ( \
720 write_extent_buffer(eb, (char *)(result), \
721 ((unsigned long)(ptr)) + \
722 offsetof(type, member), \
723 sizeof(((type *)0)->member)))
725 #ifndef BTRFS_SETGET_FUNCS
726 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
727 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
728 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
731 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
732 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
734 type *p = kmap_atomic(eb->first_page, KM_USER0); \
735 u##bits res = le##bits##_to_cpu(p->member); \
736 kunmap_atomic(p, KM_USER0); \
739 static inline void btrfs_set_##name(struct extent_buffer *eb, \
742 type *p = kmap_atomic(eb->first_page, KM_USER0); \
743 p->member = cpu_to_le##bits(val); \
744 kunmap_atomic(p, KM_USER0); \
747 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
748 static inline u##bits btrfs_##name(type *s) \
750 return le##bits##_to_cpu(s->member); \
752 static inline void btrfs_set_##name(type *s, u##bits val) \
754 s->member = cpu_to_le##bits(val); \
757 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
758 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
759 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
760 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
761 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
762 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
763 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
764 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
765 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
766 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
768 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
769 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
771 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
773 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
775 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
777 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
779 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
780 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
782 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
784 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
787 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
789 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
792 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
793 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
794 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
795 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
796 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
797 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
798 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
799 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
800 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
801 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
802 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
804 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
806 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
809 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
810 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
811 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
813 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
815 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
817 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
819 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
820 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
822 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
824 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
825 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
827 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
830 unsigned long offset = (unsigned long)c;
831 offset += offsetof(struct btrfs_chunk, stripe);
832 offset += nr * sizeof(struct btrfs_stripe);
833 return (struct btrfs_stripe *)offset;
836 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
838 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
841 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
842 struct btrfs_chunk *c, int nr)
844 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
847 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
848 struct btrfs_chunk *c, int nr,
851 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
854 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
855 struct btrfs_chunk *c, int nr)
857 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
860 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
861 struct btrfs_chunk *c, int nr,
864 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
867 /* struct btrfs_block_group_item */
868 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
870 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
872 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
873 struct btrfs_block_group_item, chunk_objectid, 64);
875 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
876 struct btrfs_block_group_item, chunk_objectid, 64);
877 BTRFS_SETGET_FUNCS(disk_block_group_flags,
878 struct btrfs_block_group_item, flags, 64);
879 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
880 struct btrfs_block_group_item, flags, 64);
882 /* struct btrfs_inode_ref */
883 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
885 /* struct btrfs_inode_item */
886 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
887 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
888 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
889 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
890 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
891 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
892 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
893 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
894 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
895 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
896 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
899 static inline struct btrfs_timespec *
900 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
902 unsigned long ptr = (unsigned long)inode_item;
903 ptr += offsetof(struct btrfs_inode_item, atime);
904 return (struct btrfs_timespec *)ptr;
907 static inline struct btrfs_timespec *
908 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
910 unsigned long ptr = (unsigned long)inode_item;
911 ptr += offsetof(struct btrfs_inode_item, mtime);
912 return (struct btrfs_timespec *)ptr;
915 static inline struct btrfs_timespec *
916 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
918 unsigned long ptr = (unsigned long)inode_item;
919 ptr += offsetof(struct btrfs_inode_item, ctime);
920 return (struct btrfs_timespec *)ptr;
923 static inline struct btrfs_timespec *
924 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
926 unsigned long ptr = (unsigned long)inode_item;
927 ptr += offsetof(struct btrfs_inode_item, otime);
928 return (struct btrfs_timespec *)ptr;
931 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
932 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
934 /* struct btrfs_extent_item */
935 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
937 /* struct btrfs_dev_extent */
938 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
940 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
942 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
944 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
946 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
948 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
949 return (u8 *)((unsigned long)dev + ptr);
952 /* struct btrfs_extent_ref */
953 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
954 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
955 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
956 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
958 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
959 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
961 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
963 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
965 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
968 /* struct btrfs_node */
969 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
970 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
972 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
975 ptr = offsetof(struct btrfs_node, ptrs) +
976 sizeof(struct btrfs_key_ptr) * nr;
977 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
980 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
984 ptr = offsetof(struct btrfs_node, ptrs) +
985 sizeof(struct btrfs_key_ptr) * nr;
986 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
989 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
992 ptr = offsetof(struct btrfs_node, ptrs) +
993 sizeof(struct btrfs_key_ptr) * nr;
994 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
997 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1001 ptr = offsetof(struct btrfs_node, ptrs) +
1002 sizeof(struct btrfs_key_ptr) * nr;
1003 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1006 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1008 return offsetof(struct btrfs_node, ptrs) +
1009 sizeof(struct btrfs_key_ptr) * nr;
1012 void btrfs_node_key(struct extent_buffer *eb,
1013 struct btrfs_disk_key *disk_key, int nr);
1015 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1016 struct btrfs_disk_key *disk_key, int nr)
1019 ptr = btrfs_node_key_ptr_offset(nr);
1020 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1021 struct btrfs_key_ptr, key, disk_key);
1024 /* struct btrfs_item */
1025 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1026 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1028 static inline unsigned long btrfs_item_nr_offset(int nr)
1030 return offsetof(struct btrfs_leaf, items) +
1031 sizeof(struct btrfs_item) * nr;
1034 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1037 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1040 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1041 struct btrfs_item *item)
1043 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1046 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1048 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1051 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1053 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1056 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1058 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1061 static inline void btrfs_item_key(struct extent_buffer *eb,
1062 struct btrfs_disk_key *disk_key, int nr)
1064 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1065 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1068 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1069 struct btrfs_disk_key *disk_key, int nr)
1071 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1072 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1075 /* struct btrfs_dir_item */
1076 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1077 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1078 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1080 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1081 struct btrfs_dir_item *item,
1082 struct btrfs_disk_key *key)
1084 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1087 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1088 struct btrfs_dir_item *item,
1089 struct btrfs_disk_key *key)
1091 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1094 /* struct btrfs_disk_key */
1095 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1097 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1098 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1100 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1101 struct btrfs_disk_key *disk)
1103 cpu->offset = le64_to_cpu(disk->offset);
1104 cpu->type = disk->type;
1105 cpu->objectid = le64_to_cpu(disk->objectid);
1108 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1109 struct btrfs_key *cpu)
1111 disk->offset = cpu_to_le64(cpu->offset);
1112 disk->type = cpu->type;
1113 disk->objectid = cpu_to_le64(cpu->objectid);
1116 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1117 struct btrfs_key *key, int nr)
1119 struct btrfs_disk_key disk_key;
1120 btrfs_node_key(eb, &disk_key, nr);
1121 btrfs_disk_key_to_cpu(key, &disk_key);
1124 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1125 struct btrfs_key *key, int nr)
1127 struct btrfs_disk_key disk_key;
1128 btrfs_item_key(eb, &disk_key, nr);
1129 btrfs_disk_key_to_cpu(key, &disk_key);
1132 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1133 struct btrfs_dir_item *item,
1134 struct btrfs_key *key)
1136 struct btrfs_disk_key disk_key;
1137 btrfs_dir_item_key(eb, item, &disk_key);
1138 btrfs_disk_key_to_cpu(key, &disk_key);
1142 static inline u8 btrfs_key_type(struct btrfs_key *key)
1147 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1152 /* struct btrfs_header */
1153 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1154 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1156 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1157 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1158 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1159 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1161 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1163 return (btrfs_header_flags(eb) & flag) == flag;
1166 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1168 u64 flags = btrfs_header_flags(eb);
1169 btrfs_set_header_flags(eb, flags | flag);
1170 return (flags & flag) == flag;
1173 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1175 u64 flags = btrfs_header_flags(eb);
1176 btrfs_set_header_flags(eb, flags & ~flag);
1177 return (flags & flag) == flag;
1180 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1182 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1186 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1188 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1192 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1194 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1198 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1200 unsigned long ptr = offsetof(struct btrfs_header, csum);
1204 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1209 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1214 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1219 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1221 return (btrfs_header_level(eb) == 0);
1224 /* struct btrfs_root_item */
1225 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1226 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1227 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1229 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1230 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1231 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1232 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1233 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1234 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1235 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1237 /* struct btrfs_super_block */
1238 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1239 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1240 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1242 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1243 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1244 struct btrfs_super_block, sys_chunk_array_size, 32);
1245 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1247 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1249 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1250 chunk_root_level, 64);
1251 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1253 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1255 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1257 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1259 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1261 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1263 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1264 root_dir_objectid, 64);
1265 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1268 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1270 return offsetof(struct btrfs_leaf, items);
1273 /* struct btrfs_file_extent_item */
1274 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1276 static inline unsigned long btrfs_file_extent_inline_start(struct
1277 btrfs_file_extent_item *e)
1279 unsigned long offset = (unsigned long)e;
1280 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1284 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1286 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1289 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1290 struct btrfs_item *e)
1292 unsigned long offset;
1293 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1294 return btrfs_item_size(eb, e) - offset;
1297 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1299 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1301 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1302 disk_num_bytes, 64);
1303 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1305 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1308 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1310 return sb->s_fs_info;
1313 static inline int btrfs_set_root_name(struct btrfs_root *root,
1314 const char *name, int len)
1316 /* if we already have a name just free it */
1320 root->name = kmalloc(len+1, GFP_KERNEL);
1324 memcpy(root->name, name, len);
1325 root->name[len] ='\0';
1330 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1332 return root->leafsize;
1333 return root->nodesize;
1336 /* helper function to cast into the data area of the leaf. */
1337 #define btrfs_item_ptr(leaf, slot, type) \
1338 ((type *)(btrfs_leaf_data(leaf) + \
1339 btrfs_item_offset_nr(leaf, slot)))
1341 #define btrfs_item_ptr_offset(leaf, slot) \
1342 ((unsigned long)(btrfs_leaf_data(leaf) + \
1343 btrfs_item_offset_nr(leaf, slot)))
1345 static inline struct dentry *fdentry(struct file *file) {
1346 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1347 return file->f_dentry;
1349 return file->f_path.dentry;
1354 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1355 struct btrfs_path *count_path,
1356 u64 expected_owner, u64 first_extent);
1357 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1358 struct btrfs_root *root);
1359 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1360 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1361 btrfs_fs_info *info,
1363 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1364 struct btrfs_block_group_cache
1365 *hint, u64 search_start,
1366 int data, int owner);
1367 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1368 struct btrfs_root *root,
1376 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1377 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1378 struct btrfs_root *root,
1379 struct btrfs_path *path, u64 bytenr,
1380 u64 root_objectid, u64 ref_generation,
1381 u64 owner, u64 owner_offset);
1382 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1383 struct btrfs_root *root,
1384 u64 num_bytes, u64 min_bytes,
1385 u64 root_objectid, u64 ref_generation,
1386 u64 owner, u64 owner_offset,
1387 u64 empty_size, u64 hint_byte,
1388 u64 search_end, struct btrfs_key *ins, u64 data);
1389 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1390 struct extent_buffer *buf);
1391 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1392 *root, u64 bytenr, u64 num_bytes,
1393 u64 root_objectid, u64 ref_generation,
1394 u64 owner_objectid, u64 owner_offset, int pin);
1395 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1396 struct btrfs_root *root,
1397 struct extent_io_tree *unpin);
1398 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1399 struct btrfs_root *root,
1400 u64 bytenr, u64 num_bytes,
1401 u64 root_objectid, u64 ref_generation,
1402 u64 owner, u64 owner_offset);
1403 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1404 struct btrfs_root *root);
1405 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1406 int btrfs_read_block_groups(struct btrfs_root *root);
1407 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root, u64 bytes_used,
1409 u64 type, u64 chunk_objectid, u64 chunk_offset,
1412 int btrfs_previous_item(struct btrfs_root *root,
1413 struct btrfs_path *path, u64 min_objectid,
1416 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1417 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1419 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1420 struct btrfs_root *root, struct extent_buffer *buf,
1421 struct extent_buffer *parent, int parent_slot,
1422 struct extent_buffer **cow_ret);
1423 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1424 struct btrfs_root *root,
1425 struct extent_buffer *buf,
1426 struct extent_buffer **cow_ret, u64 new_root_objectid);
1427 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1428 *root, struct btrfs_path *path, u32 data_size);
1429 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1430 struct btrfs_root *root,
1431 struct btrfs_path *path,
1432 u32 new_size, int from_end);
1433 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1434 *root, struct btrfs_key *key, struct btrfs_path *p, int
1436 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1437 struct btrfs_root *root, struct extent_buffer *parent,
1438 int start_slot, int cache_only, u64 *last_ret,
1439 struct btrfs_key *progress);
1440 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1441 struct btrfs_path *btrfs_alloc_path(void);
1442 void btrfs_free_path(struct btrfs_path *p);
1443 void btrfs_init_path(struct btrfs_path *p);
1444 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1445 struct btrfs_path *path, int slot, int nr);
1447 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1448 struct btrfs_root *root,
1449 struct btrfs_path *path)
1451 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1454 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1455 *root, struct btrfs_key *key, void *data, u32 data_size);
1456 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1457 struct btrfs_root *root,
1458 struct btrfs_path *path,
1459 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1461 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1462 struct btrfs_root *root,
1463 struct btrfs_path *path,
1464 struct btrfs_key *key,
1467 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1470 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1471 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1472 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1473 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1476 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1477 struct btrfs_key *key);
1478 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1479 *root, struct btrfs_key *key, struct btrfs_root_item
1481 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1482 *root, struct btrfs_key *key, struct btrfs_root_item
1484 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1485 btrfs_root_item *item, struct btrfs_key *key);
1486 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1487 u64 *found_objectid);
1488 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1489 struct btrfs_root *latest_root);
1491 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1492 *root, const char *name, int name_len, u64 dir,
1493 struct btrfs_key *location, u8 type);
1494 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1495 struct btrfs_root *root,
1496 struct btrfs_path *path, u64 dir,
1497 const char *name, int name_len,
1499 struct btrfs_dir_item *
1500 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1501 struct btrfs_root *root,
1502 struct btrfs_path *path, u64 dir,
1503 u64 objectid, const char *name, int name_len,
1505 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1506 struct btrfs_path *path,
1507 const char *name, int name_len);
1508 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1509 struct btrfs_root *root,
1510 struct btrfs_path *path,
1511 struct btrfs_dir_item *di);
1512 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1513 struct btrfs_root *root, const char *name,
1514 u16 name_len, const void *data, u16 data_len,
1516 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1517 struct btrfs_root *root,
1518 struct btrfs_path *path, u64 dir,
1519 const char *name, u16 name_len,
1522 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1523 struct btrfs_root *fs_root,
1524 u64 dirid, u64 *objectid);
1525 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1528 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1529 struct btrfs_root *root,
1530 const char *name, int name_len,
1531 u64 inode_objectid, u64 ref_objectid);
1532 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1533 struct btrfs_root *root,
1534 const char *name, int name_len,
1535 u64 inode_objectid, u64 ref_objectid);
1536 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1537 struct btrfs_root *root,
1538 struct btrfs_path *path, u64 objectid);
1539 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1540 *root, struct btrfs_path *path,
1541 struct btrfs_key *location, int mod);
1544 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1545 struct btrfs_root *root,
1546 u64 objectid, u64 pos, u64 disk_offset,
1548 u64 num_bytes, u64 offset);
1549 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1550 struct btrfs_root *root,
1551 struct btrfs_path *path, u64 objectid,
1552 u64 bytenr, int mod);
1553 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1554 struct btrfs_root *root, struct inode *inode,
1555 struct bio *bio, char *sums);
1556 int btrfs_csum_one_bio(struct btrfs_root *root,
1557 struct bio *bio, char **sums_ret);
1558 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1559 struct btrfs_root *root,
1560 struct btrfs_path *path,
1561 u64 objectid, u64 offset,
1563 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1564 struct btrfs_root *root, struct btrfs_path *path,
1567 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1568 struct btrfs_trans_handle *trans, u64 new_dirid,
1569 struct btrfs_block_group_cache *block_group);
1571 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1574 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1575 size_t size, struct bio *bio);
1577 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1580 if (dec <= inode->i_blocks)
1581 inode->i_blocks -= dec;
1583 inode->i_blocks = 0;
1586 unsigned long btrfs_force_ra(struct address_space *mapping,
1587 struct file_ra_state *ra, struct file *file,
1588 pgoff_t offset, pgoff_t last_index);
1589 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1591 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1592 int btrfs_readpage(struct file *file, struct page *page);
1593 void btrfs_delete_inode(struct inode *inode);
1594 void btrfs_put_inode(struct inode *inode);
1595 void btrfs_read_locked_inode(struct inode *inode);
1596 int btrfs_write_inode(struct inode *inode, int wait);
1597 void btrfs_dirty_inode(struct inode *inode);
1598 struct inode *btrfs_alloc_inode(struct super_block *sb);
1599 void btrfs_destroy_inode(struct inode *inode);
1600 int btrfs_init_cachep(void);
1601 void btrfs_destroy_cachep(void);
1602 long btrfs_ioctl_trans_end(struct file *file);
1603 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1604 struct btrfs_root *root);
1605 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1607 int btrfs_commit_write(struct file *file, struct page *page,
1608 unsigned from, unsigned to);
1609 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1610 size_t page_offset, u64 start, u64 end,
1612 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1613 struct btrfs_root *root,
1614 struct inode *inode);
1617 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1620 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1621 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1622 extern struct file_operations btrfs_file_operations;
1623 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1624 struct btrfs_root *root, struct inode *inode,
1625 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1626 int btrfs_release_file(struct inode *inode, struct file *file);
1629 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1630 struct btrfs_root *root, int cache_only);
1633 int btrfs_init_sysfs(void);
1634 void btrfs_exit_sysfs(void);
1635 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1636 int btrfs_sysfs_add_root(struct btrfs_root *root);
1637 void btrfs_sysfs_del_root(struct btrfs_root *root);
1638 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1641 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1642 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1643 struct btrfs_root *root, struct inode *inode);
1645 u64 btrfs_parse_size(char *str);
1646 int btrfs_parse_options(struct btrfs_root *root, char *options);
1647 int btrfs_sync_fs(struct super_block *sb, int wait);