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 alloc_mutex;
523 struct mutex chunk_mutex;
524 struct mutex drop_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;
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;
597 struct mutex objectid_mutex;
601 /* data allocations are done in sectorsize units */
604 /* node allocations are done in nodesize units */
607 /* leaf allocations are done in leafsize units */
614 u64 last_inode_alloc;
617 struct btrfs_key defrag_progress;
618 struct btrfs_key defrag_max;
624 /* the dirty list is only used by non-reference counted roots */
625 struct list_head dirty_list;
630 * inode items have the data typically returned from stat and store other
631 * info about object characteristics. There is one for every file and dir in
634 #define BTRFS_INODE_ITEM_KEY 1
635 #define BTRFS_INODE_REF_KEY 2
636 #define BTRFS_XATTR_ITEM_KEY 8
637 /* reserve 2-15 close to the inode for later flexibility */
640 * dir items are the name -> inode pointers in a directory. There is one
641 * for every name in a directory.
643 #define BTRFS_DIR_ITEM_KEY 16
644 #define BTRFS_DIR_INDEX_KEY 17
646 * extent data is for file data
648 #define BTRFS_EXTENT_DATA_KEY 18
650 * csum items have the checksums for data in the extents
652 #define BTRFS_CSUM_ITEM_KEY 19
654 /* reserve 20-31 for other file stuff */
657 * root items point to tree roots. There are typically in the root
658 * tree used by the super block to find all the other trees
660 #define BTRFS_ROOT_ITEM_KEY 32
662 * extent items are in the extent map tree. These record which blocks
663 * are used, and how many references there are to each block
665 #define BTRFS_EXTENT_ITEM_KEY 33
666 #define BTRFS_EXTENT_REF_KEY 34
669 * block groups give us hints into the extent allocation trees. Which
670 * blocks are free etc etc
672 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
674 #define BTRFS_DEV_EXTENT_KEY 75
675 #define BTRFS_DEV_ITEM_KEY 76
676 #define BTRFS_CHUNK_ITEM_KEY 77
679 * string items are for debugging. They just store a short string of
682 #define BTRFS_STRING_ITEM_KEY 253
684 #define BTRFS_MOUNT_NODATASUM (1 << 0)
685 #define BTRFS_MOUNT_NODATACOW (1 << 1)
686 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
687 #define BTRFS_MOUNT_SSD (1 << 3)
688 #define BTRFS_MOUNT_DEGRADED (1 << 4)
690 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
691 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
692 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
697 #define BTRFS_INODE_NODATASUM (1 << 0)
698 #define BTRFS_INODE_NODATACOW (1 << 1)
699 #define BTRFS_INODE_READONLY (1 << 2)
700 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
702 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
704 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
706 /* some macros to generate set/get funcs for the struct fields. This
707 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
710 #define le8_to_cpu(v) (v)
711 #define cpu_to_le8(v) (v)
714 #define read_eb_member(eb, ptr, type, member, result) ( \
715 read_extent_buffer(eb, (char *)(result), \
716 ((unsigned long)(ptr)) + \
717 offsetof(type, member), \
718 sizeof(((type *)0)->member)))
720 #define write_eb_member(eb, ptr, type, member, result) ( \
721 write_extent_buffer(eb, (char *)(result), \
722 ((unsigned long)(ptr)) + \
723 offsetof(type, member), \
724 sizeof(((type *)0)->member)))
726 #ifndef BTRFS_SETGET_FUNCS
727 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
728 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
729 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
732 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
733 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
735 type *p = kmap_atomic(eb->first_page, KM_USER0); \
736 u##bits res = le##bits##_to_cpu(p->member); \
737 kunmap_atomic(p, KM_USER0); \
740 static inline void btrfs_set_##name(struct extent_buffer *eb, \
743 type *p = kmap_atomic(eb->first_page, KM_USER0); \
744 p->member = cpu_to_le##bits(val); \
745 kunmap_atomic(p, KM_USER0); \
748 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
749 static inline u##bits btrfs_##name(type *s) \
751 return le##bits##_to_cpu(s->member); \
753 static inline void btrfs_set_##name(type *s, u##bits val) \
755 s->member = cpu_to_le##bits(val); \
758 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
759 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
760 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
761 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
762 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
763 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
764 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
765 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
766 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
767 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
769 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
770 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
772 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
774 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
776 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
778 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
780 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
781 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
783 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
785 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
788 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
790 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
793 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
794 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
795 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
796 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
797 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
798 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
799 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
800 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
801 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
802 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
803 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
805 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
807 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
810 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
811 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
812 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
814 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
816 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
818 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
820 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
821 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
823 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
825 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
826 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
828 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
831 unsigned long offset = (unsigned long)c;
832 offset += offsetof(struct btrfs_chunk, stripe);
833 offset += nr * sizeof(struct btrfs_stripe);
834 return (struct btrfs_stripe *)offset;
837 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
839 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
842 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
843 struct btrfs_chunk *c, int nr)
845 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
848 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
849 struct btrfs_chunk *c, int nr,
852 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
855 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
856 struct btrfs_chunk *c, int nr)
858 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
861 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
862 struct btrfs_chunk *c, int nr,
865 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
868 /* struct btrfs_block_group_item */
869 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
871 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
873 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
874 struct btrfs_block_group_item, chunk_objectid, 64);
876 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
877 struct btrfs_block_group_item, chunk_objectid, 64);
878 BTRFS_SETGET_FUNCS(disk_block_group_flags,
879 struct btrfs_block_group_item, flags, 64);
880 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
881 struct btrfs_block_group_item, flags, 64);
883 /* struct btrfs_inode_ref */
884 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
886 /* struct btrfs_inode_item */
887 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
888 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
889 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
890 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
891 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
892 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
893 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
894 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
895 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
896 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
897 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
900 static inline struct btrfs_timespec *
901 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
903 unsigned long ptr = (unsigned long)inode_item;
904 ptr += offsetof(struct btrfs_inode_item, atime);
905 return (struct btrfs_timespec *)ptr;
908 static inline struct btrfs_timespec *
909 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
911 unsigned long ptr = (unsigned long)inode_item;
912 ptr += offsetof(struct btrfs_inode_item, mtime);
913 return (struct btrfs_timespec *)ptr;
916 static inline struct btrfs_timespec *
917 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
919 unsigned long ptr = (unsigned long)inode_item;
920 ptr += offsetof(struct btrfs_inode_item, ctime);
921 return (struct btrfs_timespec *)ptr;
924 static inline struct btrfs_timespec *
925 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
927 unsigned long ptr = (unsigned long)inode_item;
928 ptr += offsetof(struct btrfs_inode_item, otime);
929 return (struct btrfs_timespec *)ptr;
932 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
933 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
935 /* struct btrfs_extent_item */
936 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
938 /* struct btrfs_dev_extent */
939 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
941 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
943 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
945 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
947 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
949 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
950 return (u8 *)((unsigned long)dev + ptr);
953 /* struct btrfs_extent_ref */
954 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
955 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
956 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
957 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
959 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
960 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
962 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
964 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
966 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
969 /* struct btrfs_node */
970 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
971 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
973 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
976 ptr = offsetof(struct btrfs_node, ptrs) +
977 sizeof(struct btrfs_key_ptr) * nr;
978 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
981 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
985 ptr = offsetof(struct btrfs_node, ptrs) +
986 sizeof(struct btrfs_key_ptr) * nr;
987 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
990 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
993 ptr = offsetof(struct btrfs_node, ptrs) +
994 sizeof(struct btrfs_key_ptr) * nr;
995 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
998 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1002 ptr = offsetof(struct btrfs_node, ptrs) +
1003 sizeof(struct btrfs_key_ptr) * nr;
1004 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1007 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1009 return offsetof(struct btrfs_node, ptrs) +
1010 sizeof(struct btrfs_key_ptr) * nr;
1013 void btrfs_node_key(struct extent_buffer *eb,
1014 struct btrfs_disk_key *disk_key, int nr);
1016 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1017 struct btrfs_disk_key *disk_key, int nr)
1020 ptr = btrfs_node_key_ptr_offset(nr);
1021 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1022 struct btrfs_key_ptr, key, disk_key);
1025 /* struct btrfs_item */
1026 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1027 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1029 static inline unsigned long btrfs_item_nr_offset(int nr)
1031 return offsetof(struct btrfs_leaf, items) +
1032 sizeof(struct btrfs_item) * nr;
1035 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1038 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1041 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1042 struct btrfs_item *item)
1044 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1047 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1049 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1052 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1054 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1057 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1059 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1062 static inline void btrfs_item_key(struct extent_buffer *eb,
1063 struct btrfs_disk_key *disk_key, int nr)
1065 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1066 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1069 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1070 struct btrfs_disk_key *disk_key, int nr)
1072 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1073 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1076 /* struct btrfs_dir_item */
1077 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1078 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1079 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1081 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1082 struct btrfs_dir_item *item,
1083 struct btrfs_disk_key *key)
1085 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1088 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1089 struct btrfs_dir_item *item,
1090 struct btrfs_disk_key *key)
1092 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1095 /* struct btrfs_disk_key */
1096 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1098 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1099 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1101 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1102 struct btrfs_disk_key *disk)
1104 cpu->offset = le64_to_cpu(disk->offset);
1105 cpu->type = disk->type;
1106 cpu->objectid = le64_to_cpu(disk->objectid);
1109 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1110 struct btrfs_key *cpu)
1112 disk->offset = cpu_to_le64(cpu->offset);
1113 disk->type = cpu->type;
1114 disk->objectid = cpu_to_le64(cpu->objectid);
1117 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1118 struct btrfs_key *key, int nr)
1120 struct btrfs_disk_key disk_key;
1121 btrfs_node_key(eb, &disk_key, nr);
1122 btrfs_disk_key_to_cpu(key, &disk_key);
1125 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1126 struct btrfs_key *key, int nr)
1128 struct btrfs_disk_key disk_key;
1129 btrfs_item_key(eb, &disk_key, nr);
1130 btrfs_disk_key_to_cpu(key, &disk_key);
1133 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1134 struct btrfs_dir_item *item,
1135 struct btrfs_key *key)
1137 struct btrfs_disk_key disk_key;
1138 btrfs_dir_item_key(eb, item, &disk_key);
1139 btrfs_disk_key_to_cpu(key, &disk_key);
1143 static inline u8 btrfs_key_type(struct btrfs_key *key)
1148 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1153 /* struct btrfs_header */
1154 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1155 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1157 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1158 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1159 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1160 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1162 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1164 return (btrfs_header_flags(eb) & flag) == flag;
1167 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1169 u64 flags = btrfs_header_flags(eb);
1170 btrfs_set_header_flags(eb, flags | flag);
1171 return (flags & flag) == flag;
1174 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1176 u64 flags = btrfs_header_flags(eb);
1177 btrfs_set_header_flags(eb, flags & ~flag);
1178 return (flags & flag) == flag;
1181 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1183 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1187 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1189 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1193 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1195 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1199 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1201 unsigned long ptr = offsetof(struct btrfs_header, csum);
1205 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1210 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1215 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1220 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1222 return (btrfs_header_level(eb) == 0);
1225 /* struct btrfs_root_item */
1226 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1227 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1228 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1230 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1231 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1232 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1233 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1234 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1235 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1236 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1238 /* struct btrfs_super_block */
1239 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1240 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1241 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1243 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1244 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1245 struct btrfs_super_block, sys_chunk_array_size, 32);
1246 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1248 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1250 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1251 chunk_root_level, 64);
1252 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1254 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1256 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1258 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1260 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1262 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1264 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1265 root_dir_objectid, 64);
1266 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1269 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1271 return offsetof(struct btrfs_leaf, items);
1274 /* struct btrfs_file_extent_item */
1275 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1277 static inline unsigned long btrfs_file_extent_inline_start(struct
1278 btrfs_file_extent_item *e)
1280 unsigned long offset = (unsigned long)e;
1281 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1285 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1287 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1290 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1291 struct btrfs_item *e)
1293 unsigned long offset;
1294 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1295 return btrfs_item_size(eb, e) - offset;
1298 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1300 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1302 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1303 disk_num_bytes, 64);
1304 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1306 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1309 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1311 return sb->s_fs_info;
1314 static inline int btrfs_set_root_name(struct btrfs_root *root,
1315 const char *name, int len)
1317 /* if we already have a name just free it */
1321 root->name = kmalloc(len+1, GFP_KERNEL);
1325 memcpy(root->name, name, len);
1326 root->name[len] ='\0';
1331 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1333 return root->leafsize;
1334 return root->nodesize;
1337 /* helper function to cast into the data area of the leaf. */
1338 #define btrfs_item_ptr(leaf, slot, type) \
1339 ((type *)(btrfs_leaf_data(leaf) + \
1340 btrfs_item_offset_nr(leaf, slot)))
1342 #define btrfs_item_ptr_offset(leaf, slot) \
1343 ((unsigned long)(btrfs_leaf_data(leaf) + \
1344 btrfs_item_offset_nr(leaf, slot)))
1346 static inline struct dentry *fdentry(struct file *file) {
1347 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1348 return file->f_dentry;
1350 return file->f_path.dentry;
1355 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1356 struct btrfs_path *count_path,
1357 u64 expected_owner, u64 first_extent);
1358 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1359 struct btrfs_root *root);
1360 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1361 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1362 btrfs_fs_info *info,
1364 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1365 struct btrfs_block_group_cache
1366 *hint, u64 search_start,
1367 int data, int owner);
1368 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1369 struct btrfs_root *root,
1377 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1378 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1379 struct btrfs_root *root,
1380 struct btrfs_path *path, u64 bytenr,
1381 u64 root_objectid, u64 ref_generation,
1382 u64 owner, u64 owner_offset);
1383 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1384 struct btrfs_root *root,
1385 u64 num_bytes, u64 min_bytes,
1386 u64 root_objectid, u64 ref_generation,
1387 u64 owner, u64 owner_offset,
1388 u64 empty_size, u64 hint_byte,
1389 u64 search_end, struct btrfs_key *ins, u64 data);
1390 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1391 struct extent_buffer *buf);
1392 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1393 *root, u64 bytenr, u64 num_bytes,
1394 u64 root_objectid, u64 ref_generation,
1395 u64 owner_objectid, u64 owner_offset, int pin);
1396 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1397 struct btrfs_root *root,
1398 struct extent_io_tree *unpin);
1399 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1400 struct btrfs_root *root,
1401 u64 bytenr, u64 num_bytes,
1402 u64 root_objectid, u64 ref_generation,
1403 u64 owner, u64 owner_offset);
1404 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1405 struct btrfs_root *root);
1406 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1407 int btrfs_read_block_groups(struct btrfs_root *root);
1408 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1409 struct btrfs_root *root, u64 bytes_used,
1410 u64 type, u64 chunk_objectid, u64 chunk_offset,
1413 int btrfs_previous_item(struct btrfs_root *root,
1414 struct btrfs_path *path, u64 min_objectid,
1417 struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
1418 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
1420 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1421 struct btrfs_root *root, struct extent_buffer *buf,
1422 struct extent_buffer *parent, int parent_slot,
1423 struct extent_buffer **cow_ret);
1424 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1425 struct btrfs_root *root,
1426 struct extent_buffer *buf,
1427 struct extent_buffer **cow_ret, u64 new_root_objectid);
1428 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1429 *root, struct btrfs_path *path, u32 data_size);
1430 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1431 struct btrfs_root *root,
1432 struct btrfs_path *path,
1433 u32 new_size, int from_end);
1434 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1435 *root, struct btrfs_key *key, struct btrfs_path *p, int
1437 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1438 struct btrfs_root *root, struct extent_buffer *parent,
1439 int start_slot, int cache_only, u64 *last_ret,
1440 struct btrfs_key *progress);
1441 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1442 struct btrfs_path *btrfs_alloc_path(void);
1443 void btrfs_free_path(struct btrfs_path *p);
1444 void btrfs_init_path(struct btrfs_path *p);
1445 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1446 struct btrfs_path *path, int slot, int nr);
1448 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1449 struct btrfs_root *root,
1450 struct btrfs_path *path)
1452 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1455 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1456 *root, struct btrfs_key *key, void *data, u32 data_size);
1457 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1458 struct btrfs_root *root,
1459 struct btrfs_path *path,
1460 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1462 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1463 struct btrfs_root *root,
1464 struct btrfs_path *path,
1465 struct btrfs_key *key,
1468 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1471 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1472 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1473 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1474 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1477 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1478 struct btrfs_key *key);
1479 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1480 *root, struct btrfs_key *key, struct btrfs_root_item
1482 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1483 *root, struct btrfs_key *key, struct btrfs_root_item
1485 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1486 btrfs_root_item *item, struct btrfs_key *key);
1487 int btrfs_search_root(struct btrfs_root *root, u64 search_start,
1488 u64 *found_objectid);
1489 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1490 struct btrfs_root *latest_root);
1492 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1493 *root, const char *name, int name_len, u64 dir,
1494 struct btrfs_key *location, u8 type);
1495 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1496 struct btrfs_root *root,
1497 struct btrfs_path *path, u64 dir,
1498 const char *name, int name_len,
1500 struct btrfs_dir_item *
1501 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1502 struct btrfs_root *root,
1503 struct btrfs_path *path, u64 dir,
1504 u64 objectid, const char *name, int name_len,
1506 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1507 struct btrfs_path *path,
1508 const char *name, int name_len);
1509 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1510 struct btrfs_root *root,
1511 struct btrfs_path *path,
1512 struct btrfs_dir_item *di);
1513 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1514 struct btrfs_root *root, const char *name,
1515 u16 name_len, const void *data, u16 data_len,
1517 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1518 struct btrfs_root *root,
1519 struct btrfs_path *path, u64 dir,
1520 const char *name, u16 name_len,
1523 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1524 struct btrfs_root *fs_root,
1525 u64 dirid, u64 *objectid);
1526 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1529 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1530 struct btrfs_root *root,
1531 const char *name, int name_len,
1532 u64 inode_objectid, u64 ref_objectid);
1533 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1534 struct btrfs_root *root,
1535 const char *name, int name_len,
1536 u64 inode_objectid, u64 ref_objectid);
1537 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1538 struct btrfs_root *root,
1539 struct btrfs_path *path, u64 objectid);
1540 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1541 *root, struct btrfs_path *path,
1542 struct btrfs_key *location, int mod);
1545 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1546 struct btrfs_root *root,
1547 u64 objectid, u64 pos, u64 disk_offset,
1549 u64 num_bytes, u64 offset);
1550 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1551 struct btrfs_root *root,
1552 struct btrfs_path *path, u64 objectid,
1553 u64 bytenr, int mod);
1554 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1555 struct btrfs_root *root, struct inode *inode,
1556 struct bio *bio, char *sums);
1557 int btrfs_csum_one_bio(struct btrfs_root *root,
1558 struct bio *bio, char **sums_ret);
1559 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1560 struct btrfs_root *root,
1561 struct btrfs_path *path,
1562 u64 objectid, u64 offset,
1564 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1565 struct btrfs_root *root, struct btrfs_path *path,
1568 int btrfs_create_subvol_root(struct btrfs_root *new_root,
1569 struct btrfs_trans_handle *trans, u64 new_dirid,
1570 struct btrfs_block_group_cache *block_group);
1572 void btrfs_invalidate_dcache_root(struct btrfs_root *root, char *name,
1575 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1576 size_t size, struct bio *bio);
1578 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1581 if (dec <= inode->i_blocks)
1582 inode->i_blocks -= dec;
1584 inode->i_blocks = 0;
1587 unsigned long btrfs_force_ra(struct address_space *mapping,
1588 struct file_ra_state *ra, struct file *file,
1589 pgoff_t offset, pgoff_t last_index);
1590 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1592 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1593 int btrfs_readpage(struct file *file, struct page *page);
1594 void btrfs_delete_inode(struct inode *inode);
1595 void btrfs_put_inode(struct inode *inode);
1596 void btrfs_read_locked_inode(struct inode *inode);
1597 int btrfs_write_inode(struct inode *inode, int wait);
1598 void btrfs_dirty_inode(struct inode *inode);
1599 struct inode *btrfs_alloc_inode(struct super_block *sb);
1600 void btrfs_destroy_inode(struct inode *inode);
1601 int btrfs_init_cachep(void);
1602 void btrfs_destroy_cachep(void);
1603 long btrfs_ioctl_trans_end(struct file *file);
1604 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1605 struct btrfs_root *root);
1606 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1608 int btrfs_commit_write(struct file *file, struct page *page,
1609 unsigned from, unsigned to);
1610 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1611 size_t page_offset, u64 start, u64 end,
1613 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1614 struct btrfs_root *root,
1615 struct inode *inode);
1618 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1621 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1622 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1623 extern struct file_operations btrfs_file_operations;
1624 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1625 struct btrfs_root *root, struct inode *inode,
1626 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1627 int btrfs_release_file(struct inode *inode, struct file *file);
1630 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1631 struct btrfs_root *root, int cache_only);
1634 int btrfs_init_sysfs(void);
1635 void btrfs_exit_sysfs(void);
1636 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1637 int btrfs_sysfs_add_root(struct btrfs_root *root);
1638 void btrfs_sysfs_del_root(struct btrfs_root *root);
1639 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1642 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1643 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1644 struct btrfs_root *root, struct inode *inode);
1646 u64 btrfs_parse_size(char *str);
1647 int btrfs_parse_options(struct btrfs_root *root, char *options);
1648 int btrfs_sync_fs(struct super_block *sb, int wait);