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"
34 struct btrfs_trans_handle;
35 struct btrfs_transaction;
36 extern struct kmem_cache *btrfs_trans_handle_cachep;
37 extern struct kmem_cache *btrfs_transaction_cachep;
38 extern struct kmem_cache *btrfs_bit_radix_cachep;
39 extern struct kmem_cache *btrfs_path_cachep;
41 #define BTRFS_MAGIC "_B5RfS_M"
43 #define BTRFS_MAX_LEVEL 8
45 /* holds pointers to all of the tree roots */
46 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
48 /* stores information about which extents are in use, and reference counts */
49 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
52 * chunk tree stores translations from logical -> physical block numbering
53 * the super block points to the chunk tree
55 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
58 * stores information about which areas of a given device are in use.
59 * one per device. The tree of tree roots points to the device tree
61 #define BTRFS_DEV_TREE_OBJECTID 4ULL
63 /* one per subvolume, storing files and directories */
64 #define BTRFS_FS_TREE_OBJECTID 5ULL
66 /* directory objectid inside the root tree */
67 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 * All files have objectids higher than this.
72 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
76 * the device items go into the chunk tree. The key is in the form
77 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
79 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
82 * we can actually store much bigger names, but lets not confuse the rest
85 #define BTRFS_NAME_LEN 255
87 /* 32 bytes in various csum fields */
88 #define BTRFS_CSUM_SIZE 32
89 /* four bytes for CRC32 */
90 #define BTRFS_CRC32_SIZE 4
91 #define BTRFS_EMPTY_DIR_SIZE 0
93 #define BTRFS_FT_UNKNOWN 0
94 #define BTRFS_FT_REG_FILE 1
95 #define BTRFS_FT_DIR 2
96 #define BTRFS_FT_CHRDEV 3
97 #define BTRFS_FT_BLKDEV 4
98 #define BTRFS_FT_FIFO 5
99 #define BTRFS_FT_SOCK 6
100 #define BTRFS_FT_SYMLINK 7
101 #define BTRFS_FT_XATTR 8
102 #define BTRFS_FT_MAX 9
105 * the key defines the order in the tree, and so it also defines (optimal)
106 * block layout. objectid corresonds to the inode number. The flags
107 * tells us things about the object, and is a kind of stream selector.
108 * so for a given inode, keys with flags of 1 might refer to the inode
109 * data, flags of 2 may point to file data in the btree and flags == 3
110 * may point to extents.
112 * offset is the starting byte offset for this key in the stream.
114 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
115 * in cpu native order. Otherwise they are identical and their sizes
116 * should be the same (ie both packed)
118 struct btrfs_disk_key {
122 } __attribute__ ((__packed__));
128 } __attribute__ ((__packed__));
130 struct btrfs_mapping_tree {
131 struct extent_map_tree map_tree;
134 #define BTRFS_DEV_UUID_SIZE 16
135 struct btrfs_dev_item {
136 /* the internal btrfs device id */
139 /* size of the device */
145 /* optimal io alignment for this device */
148 /* optimal io width for this device */
151 /* minimal io size for this device */
154 /* type and info about this device */
157 /* btrfs generated uuid for this device */
158 u8 uuid[BTRFS_DEV_UUID_SIZE];
159 } __attribute__ ((__packed__));
161 struct btrfs_stripe {
164 } __attribute__ ((__packed__));
171 /* optimal io alignment for this chunk */
174 /* optimal io width for this chunk */
177 /* minimal io size for this chunk */
180 /* 2^16 stripes is quite a lot, a second limit is the size of a single
184 struct btrfs_stripe stripe;
185 /* additional stripes go here */
186 } __attribute__ ((__packed__));
188 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
190 BUG_ON(num_stripes == 0);
191 return sizeof(struct btrfs_chunk) +
192 sizeof(struct btrfs_stripe) * (num_stripes - 1);
195 #define BTRFS_FSID_SIZE 16
196 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
199 * every tree block (leaf or node) starts with this header.
201 struct btrfs_header {
202 u8 csum[BTRFS_CSUM_SIZE];
203 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
204 __le64 bytenr; /* which block this node is supposed to live in */
210 } __attribute__ ((__packed__));
212 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
213 sizeof(struct btrfs_header)) / \
214 sizeof(struct btrfs_key_ptr))
215 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
216 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
217 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
218 sizeof(struct btrfs_item) - \
219 sizeof(struct btrfs_file_extent_item))
223 * this is a very generous portion of the super block, giving us
224 * room to translate 14 chunks with 3 stripes each.
226 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
229 * the super block basically lists the main trees of the FS
230 * it currently lacks any block count etc etc
232 struct btrfs_super_block {
233 u8 csum[BTRFS_CSUM_SIZE];
234 /* the first 4 fields must match struct btrfs_header */
235 u8 fsid[16]; /* FS specific uuid */
236 __le64 bytenr; /* this block number */
244 __le64 root_dir_objectid;
250 __le32 sys_chunk_array_size;
253 struct btrfs_dev_item dev_item;
254 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
255 } __attribute__ ((__packed__));
258 * A leaf is full of items. offset and size tell us where to find
259 * the item in the leaf (relative to the start of the data area)
262 struct btrfs_disk_key key;
265 } __attribute__ ((__packed__));
268 * leaves have an item area and a data area:
269 * [item0, item1....itemN] [free space] [dataN...data1, data0]
271 * The data is separate from the items to get the keys closer together
275 struct btrfs_header header;
276 struct btrfs_item items[];
277 } __attribute__ ((__packed__));
280 * all non-leaf blocks are nodes, they hold only keys and pointers to
283 struct btrfs_key_ptr {
284 struct btrfs_disk_key key;
287 } __attribute__ ((__packed__));
290 struct btrfs_header header;
291 struct btrfs_key_ptr ptrs[];
292 } __attribute__ ((__packed__));
295 * btrfs_paths remember the path taken from the root down to the leaf.
296 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
297 * to any other levels that are present.
299 * The slots array records the index of the item or block pointer
300 * used while walking the tree.
303 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
304 int slots[BTRFS_MAX_LEVEL];
310 * items in the extent btree are used to record the objectid of the
311 * owner of the block and the number of references
313 struct btrfs_extent_item {
315 } __attribute__ ((__packed__));
317 struct btrfs_extent_ref {
322 } __attribute__ ((__packed__));
324 /* dev extents record free space on individual devices. The owner
325 * field points back to the chunk allocation mapping tree that allocated
328 struct btrfs_dev_extent {
331 } __attribute__ ((__packed__));
334 struct btrfs_inode_ref {
337 } __attribute__ ((__packed__));
339 struct btrfs_timespec {
342 } __attribute__ ((__packed__));
345 * there is no padding here on purpose. If you want to extent the inode,
346 * make a new item type
348 struct btrfs_inode_item {
360 struct btrfs_timespec atime;
361 struct btrfs_timespec ctime;
362 struct btrfs_timespec mtime;
363 struct btrfs_timespec otime;
364 } __attribute__ ((__packed__));
366 struct btrfs_dir_item {
367 struct btrfs_disk_key location;
371 } __attribute__ ((__packed__));
373 struct btrfs_root_item {
374 struct btrfs_inode_item inode;
381 struct btrfs_disk_key drop_progress;
384 } __attribute__ ((__packed__));
386 #define BTRFS_FILE_EXTENT_REG 0
387 #define BTRFS_FILE_EXTENT_INLINE 1
389 struct btrfs_file_extent_item {
393 * disk space consumed by the extent, checksum blocks are included
397 __le64 disk_num_bytes;
399 * the logical offset in file blocks (no csums)
400 * this extent record is for. This allows a file extent to point
401 * into the middle of an existing extent on disk, sharing it
402 * between two snapshots (useful if some bytes in the middle of the
403 * extent have changed
407 * the logical number of file blocks (no csums included)
410 } __attribute__ ((__packed__));
412 struct btrfs_csum_item {
414 } __attribute__ ((__packed__));
416 /* different types of block groups (and chunks) */
417 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
418 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
419 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
420 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
421 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
422 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
425 struct btrfs_block_group_item {
428 __le64 chunk_objectid;
430 } __attribute__ ((__packed__));
432 struct btrfs_space_info {
438 struct list_head list;
441 struct btrfs_block_group_cache {
442 struct btrfs_key key;
443 struct btrfs_block_group_item item;
444 struct btrfs_space_info *space_info;
451 struct btrfs_fs_devices;
452 struct btrfs_fs_info {
453 u8 fsid[BTRFS_FSID_SIZE];
454 struct btrfs_root *extent_root;
455 struct btrfs_root *tree_root;
456 struct btrfs_root *chunk_root;
457 struct btrfs_root *dev_root;
458 struct radix_tree_root fs_roots_radix;
460 struct extent_io_tree free_space_cache;
461 struct extent_io_tree block_group_cache;
462 struct extent_io_tree pinned_extents;
463 struct extent_io_tree pending_del;
464 struct extent_io_tree extent_ins;
466 /* logical->physical extent mapping */
467 struct btrfs_mapping_tree mapping_tree;
470 u64 last_trans_committed;
471 unsigned long mount_opt;
475 struct btrfs_transaction *running_transaction;
476 struct btrfs_super_block super_copy;
477 struct extent_buffer *sb_buffer;
478 struct block_device *__bdev;
479 struct super_block *sb;
480 struct inode *btree_inode;
481 struct backing_dev_info bdi;
482 spinlock_t hash_lock;
483 struct mutex trans_mutex;
484 struct mutex fs_mutex;
485 struct list_head trans_list;
486 struct list_head hashers;
487 struct list_head dead_roots;
488 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
489 struct work_struct trans_work;
491 struct delayed_work trans_work;
493 struct kobject super_kobj;
494 struct completion kobj_unregister;
497 unsigned long throttles;
500 struct list_head dirty_cowonly_roots;
502 struct btrfs_fs_devices *fs_devices;
503 struct list_head space_info;
504 spinlock_t delalloc_lock;
505 spinlock_t new_trans_lock;
510 u64 avail_data_alloc_bits;
511 u64 avail_metadata_alloc_bits;
512 u64 avail_system_alloc_bits;
513 u64 data_alloc_profile;
514 u64 metadata_alloc_profile;
515 u64 system_alloc_profile;
519 * in ram representation of the tree. extent_root is used for all allocations
520 * and for the extent tree extent_root root.
523 struct extent_buffer *node;
524 struct extent_buffer *commit_root;
525 struct btrfs_root_item root_item;
526 struct btrfs_key root_key;
527 struct btrfs_fs_info *fs_info;
529 struct kobject root_kobj;
530 struct completion kobj_unregister;
534 /* data allocations are done in sectorsize units */
537 /* node allocations are done in nodesize units */
540 /* leaf allocations are done in leafsize units */
547 u64 last_inode_alloc;
550 struct btrfs_key defrag_progress;
556 /* the dirty list is only used by non-reference counted roots */
557 struct list_head dirty_list;
562 * inode items have the data typically returned from stat and store other
563 * info about object characteristics. There is one for every file and dir in
566 #define BTRFS_INODE_ITEM_KEY 1
567 #define BTRFS_INODE_REF_KEY 2
568 #define BTRFS_XATTR_ITEM_KEY 8
569 /* reserve 2-15 close to the inode for later flexibility */
572 * dir items are the name -> inode pointers in a directory. There is one
573 * for every name in a directory.
575 #define BTRFS_DIR_ITEM_KEY 16
576 #define BTRFS_DIR_INDEX_KEY 17
578 * extent data is for file data
580 #define BTRFS_EXTENT_DATA_KEY 18
582 * csum items have the checksums for data in the extents
584 #define BTRFS_CSUM_ITEM_KEY 19
586 /* reserve 20-31 for other file stuff */
589 * root items point to tree roots. There are typically in the root
590 * tree used by the super block to find all the other trees
592 #define BTRFS_ROOT_ITEM_KEY 32
594 * extent items are in the extent map tree. These record which blocks
595 * are used, and how many references there are to each block
597 #define BTRFS_EXTENT_ITEM_KEY 33
598 #define BTRFS_EXTENT_REF_KEY 34
601 * block groups give us hints into the extent allocation trees. Which
602 * blocks are free etc etc
604 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
606 #define BTRFS_DEV_EXTENT_KEY 75
607 #define BTRFS_DEV_ITEM_KEY 76
608 #define BTRFS_CHUNK_ITEM_KEY 77
611 * string items are for debugging. They just store a short string of
614 #define BTRFS_STRING_ITEM_KEY 253
616 #define BTRFS_MOUNT_NODATASUM (1 << 0)
617 #define BTRFS_MOUNT_NODATACOW (1 << 1)
618 #define BTRFS_MOUNT_NOBARRIER (1 << 2)
619 #define BTRFS_MOUNT_SSD (1 << 3)
621 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
622 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
623 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
628 #define BTRFS_INODE_NODATASUM (1 << 0)
629 #define BTRFS_INODE_NODATACOW (1 << 1)
630 #define BTRFS_INODE_READONLY (1 << 2)
631 #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \
633 #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \
635 #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \
637 /* some macros to generate set/get funcs for the struct fields. This
638 * assumes there is a lefoo_to_cpu for every type, so lets make a simple
641 #define le8_to_cpu(v) (v)
642 #define cpu_to_le8(v) (v)
645 #define read_eb_member(eb, ptr, type, member, result) ( \
646 read_extent_buffer(eb, (char *)(result), \
647 ((unsigned long)(ptr)) + \
648 offsetof(type, member), \
649 sizeof(((type *)0)->member)))
651 #define write_eb_member(eb, ptr, type, member, result) ( \
652 write_extent_buffer(eb, (char *)(result), \
653 ((unsigned long)(ptr)) + \
654 offsetof(type, member), \
655 sizeof(((type *)0)->member)))
657 #ifndef BTRFS_SETGET_FUNCS
658 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
659 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \
660 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val);
663 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
664 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
666 type *p = kmap_atomic(eb->first_page, KM_USER0); \
667 u##bits res = le##bits##_to_cpu(p->member); \
668 kunmap_atomic(p, KM_USER0); \
671 static inline void btrfs_set_##name(struct extent_buffer *eb, \
674 type *p = kmap_atomic(eb->first_page, KM_USER0); \
675 p->member = cpu_to_le##bits(val); \
676 kunmap_atomic(p, KM_USER0); \
679 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
680 static inline u##bits btrfs_##name(type *s) \
682 return le##bits##_to_cpu(s->member); \
684 static inline void btrfs_set_##name(type *s, u##bits val) \
686 s->member = cpu_to_le##bits(val); \
689 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
690 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
691 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
692 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
693 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
694 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
695 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
697 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
698 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
700 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
702 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
704 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
706 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
708 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
710 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
712 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
715 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
716 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
717 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
718 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
719 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
720 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
721 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
722 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
723 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
725 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
726 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
728 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
730 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
732 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
734 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
735 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
737 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
738 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
740 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
743 unsigned long offset = (unsigned long)c;
744 offset += offsetof(struct btrfs_chunk, stripe);
745 offset += nr * sizeof(struct btrfs_stripe);
746 return (struct btrfs_stripe *)offset;
749 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
750 struct btrfs_chunk *c, int nr)
752 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
755 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
756 struct btrfs_chunk *c, int nr,
759 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
762 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
763 struct btrfs_chunk *c, int nr)
765 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
768 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
769 struct btrfs_chunk *c, int nr,
772 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
775 /* struct btrfs_block_group_item */
776 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
778 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
780 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
782 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
784 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
785 struct btrfs_block_group_item, chunk_objectid, 64);
786 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
787 struct btrfs_block_group_item, chunk_objectid, 64);
788 BTRFS_SETGET_FUNCS(disk_block_group_flags,
789 struct btrfs_block_group_item, flags, 64);
790 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
791 struct btrfs_block_group_item, flags, 64);
793 /* struct btrfs_inode_ref */
794 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
796 /* struct btrfs_inode_item */
797 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
798 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
799 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
800 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
801 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
802 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
803 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
804 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
805 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
806 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
807 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
810 static inline struct btrfs_timespec *
811 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
813 unsigned long ptr = (unsigned long)inode_item;
814 ptr += offsetof(struct btrfs_inode_item, atime);
815 return (struct btrfs_timespec *)ptr;
818 static inline struct btrfs_timespec *
819 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
821 unsigned long ptr = (unsigned long)inode_item;
822 ptr += offsetof(struct btrfs_inode_item, mtime);
823 return (struct btrfs_timespec *)ptr;
826 static inline struct btrfs_timespec *
827 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
829 unsigned long ptr = (unsigned long)inode_item;
830 ptr += offsetof(struct btrfs_inode_item, ctime);
831 return (struct btrfs_timespec *)ptr;
834 static inline struct btrfs_timespec *
835 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
837 unsigned long ptr = (unsigned long)inode_item;
838 ptr += offsetof(struct btrfs_inode_item, otime);
839 return (struct btrfs_timespec *)ptr;
842 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
843 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
845 /* struct btrfs_extent_item */
846 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
848 /* struct btrfs_dev_extent */
849 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
850 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
852 /* struct btrfs_extent_ref */
853 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
854 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
855 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
856 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
858 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
859 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
861 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
863 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
865 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
868 /* struct btrfs_node */
869 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
870 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
872 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
875 ptr = offsetof(struct btrfs_node, ptrs) +
876 sizeof(struct btrfs_key_ptr) * nr;
877 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
880 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
884 ptr = offsetof(struct btrfs_node, ptrs) +
885 sizeof(struct btrfs_key_ptr) * nr;
886 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
889 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
892 ptr = offsetof(struct btrfs_node, ptrs) +
893 sizeof(struct btrfs_key_ptr) * nr;
894 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
897 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
901 ptr = offsetof(struct btrfs_node, ptrs) +
902 sizeof(struct btrfs_key_ptr) * nr;
903 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
906 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
908 return offsetof(struct btrfs_node, ptrs) +
909 sizeof(struct btrfs_key_ptr) * nr;
912 void btrfs_node_key(struct extent_buffer *eb,
913 struct btrfs_disk_key *disk_key, int nr);
915 static inline void btrfs_set_node_key(struct extent_buffer *eb,
916 struct btrfs_disk_key *disk_key, int nr)
919 ptr = btrfs_node_key_ptr_offset(nr);
920 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
921 struct btrfs_key_ptr, key, disk_key);
924 /* struct btrfs_item */
925 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
926 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
928 static inline unsigned long btrfs_item_nr_offset(int nr)
930 return offsetof(struct btrfs_leaf, items) +
931 sizeof(struct btrfs_item) * nr;
934 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
937 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
940 static inline u32 btrfs_item_end(struct extent_buffer *eb,
941 struct btrfs_item *item)
943 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
946 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
948 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
951 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
953 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
956 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
958 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
961 static inline void btrfs_item_key(struct extent_buffer *eb,
962 struct btrfs_disk_key *disk_key, int nr)
964 struct btrfs_item *item = btrfs_item_nr(eb, nr);
965 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
968 static inline void btrfs_set_item_key(struct extent_buffer *eb,
969 struct btrfs_disk_key *disk_key, int nr)
971 struct btrfs_item *item = btrfs_item_nr(eb, nr);
972 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
975 /* struct btrfs_dir_item */
976 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
977 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
978 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
980 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
981 struct btrfs_dir_item *item,
982 struct btrfs_disk_key *key)
984 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
987 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
988 struct btrfs_dir_item *item,
989 struct btrfs_disk_key *key)
991 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
994 /* struct btrfs_disk_key */
995 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
997 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
998 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1000 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1001 struct btrfs_disk_key *disk)
1003 cpu->offset = le64_to_cpu(disk->offset);
1004 cpu->type = disk->type;
1005 cpu->objectid = le64_to_cpu(disk->objectid);
1008 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1009 struct btrfs_key *cpu)
1011 disk->offset = cpu_to_le64(cpu->offset);
1012 disk->type = cpu->type;
1013 disk->objectid = cpu_to_le64(cpu->objectid);
1016 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1017 struct btrfs_key *key, int nr)
1019 struct btrfs_disk_key disk_key;
1020 btrfs_node_key(eb, &disk_key, nr);
1021 btrfs_disk_key_to_cpu(key, &disk_key);
1024 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1025 struct btrfs_key *key, int nr)
1027 struct btrfs_disk_key disk_key;
1028 btrfs_item_key(eb, &disk_key, nr);
1029 btrfs_disk_key_to_cpu(key, &disk_key);
1032 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1033 struct btrfs_dir_item *item,
1034 struct btrfs_key *key)
1036 struct btrfs_disk_key disk_key;
1037 btrfs_dir_item_key(eb, item, &disk_key);
1038 btrfs_disk_key_to_cpu(key, &disk_key);
1042 static inline u8 btrfs_key_type(struct btrfs_key *key)
1047 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1052 /* struct btrfs_header */
1053 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1054 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1056 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1057 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1058 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1059 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1061 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1063 return (btrfs_header_flags(eb) & flag) == flag;
1066 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1068 u64 flags = btrfs_header_flags(eb);
1069 btrfs_set_header_flags(eb, flags | flag);
1070 return (flags & flag) == flag;
1073 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1075 u64 flags = btrfs_header_flags(eb);
1076 btrfs_set_header_flags(eb, flags & ~flag);
1077 return (flags & flag) == flag;
1080 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1082 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1086 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1088 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1092 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1094 unsigned long ptr = offsetof(struct btrfs_header, csum);
1098 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1103 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1108 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1113 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1115 return (btrfs_header_level(eb) == 0);
1118 /* struct btrfs_root_item */
1119 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1120 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1121 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1123 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1124 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1125 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1126 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1127 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1128 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1129 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1131 /* struct btrfs_super_block */
1132 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1133 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1135 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1136 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1137 struct btrfs_super_block, sys_chunk_array_size, 32);
1138 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1140 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1142 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1143 chunk_root_level, 64);
1144 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1146 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1148 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1150 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1152 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1154 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1156 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1157 root_dir_objectid, 64);
1158 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1161 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1163 return offsetof(struct btrfs_leaf, items);
1166 /* struct btrfs_file_extent_item */
1167 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1169 static inline unsigned long btrfs_file_extent_inline_start(struct
1170 btrfs_file_extent_item *e)
1172 unsigned long offset = (unsigned long)e;
1173 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1177 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1179 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1182 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1183 struct btrfs_item *e)
1185 unsigned long offset;
1186 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1187 return btrfs_item_size(eb, e) - offset;
1190 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1192 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1194 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1195 disk_num_bytes, 64);
1196 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1198 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1201 static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
1203 return sb->s_fs_info;
1206 static inline int btrfs_set_root_name(struct btrfs_root *root,
1207 const char *name, int len)
1209 /* if we already have a name just free it */
1213 root->name = kmalloc(len+1, GFP_KERNEL);
1217 memcpy(root->name, name, len);
1218 root->name[len] ='\0';
1223 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1225 return root->leafsize;
1226 return root->nodesize;
1229 /* helper function to cast into the data area of the leaf. */
1230 #define btrfs_item_ptr(leaf, slot, type) \
1231 ((type *)(btrfs_leaf_data(leaf) + \
1232 btrfs_item_offset_nr(leaf, slot)))
1234 #define btrfs_item_ptr_offset(leaf, slot) \
1235 ((unsigned long)(btrfs_leaf_data(leaf) + \
1236 btrfs_item_offset_nr(leaf, slot)))
1238 static inline struct dentry *fdentry(struct file *file) {
1239 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
1240 return file->f_dentry;
1242 return file->f_path.dentry;
1247 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1248 struct btrfs_path *count_path,
1250 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1251 struct btrfs_root *root);
1252 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1253 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1254 btrfs_fs_info *info,
1256 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1257 struct btrfs_block_group_cache
1258 *hint, u64 search_start,
1259 int data, int owner);
1260 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1261 struct btrfs_root *root, u64 owner_objectid);
1262 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1263 struct btrfs_root *root, u32 size,
1265 u64 hint, u64 empty_size);
1266 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1267 struct btrfs_root *root,
1275 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1276 struct btrfs_root *root, u64 new_size);
1277 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1278 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1279 struct btrfs_root *root,
1280 struct btrfs_path *path, u64 bytenr,
1281 u64 root_objectid, u64 ref_generation,
1282 u64 owner, u64 owner_offset);
1283 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1284 struct btrfs_root *root,
1285 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1286 u64 owner, u64 owner_offset,
1287 u64 empty_size, u64 hint_byte,
1288 u64 search_end, struct btrfs_key *ins, int data);
1289 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1290 struct extent_buffer *buf);
1291 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1292 *root, u64 bytenr, u64 num_bytes,
1293 u64 root_objectid, u64 ref_generation,
1294 u64 owner_objectid, u64 owner_offset, int pin);
1295 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1296 struct btrfs_root *root,
1297 struct extent_io_tree *unpin);
1298 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1299 struct btrfs_root *root,
1300 u64 bytenr, u64 num_bytes,
1301 u64 root_objectid, u64 ref_generation,
1302 u64 owner, u64 owner_offset);
1303 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1304 struct btrfs_root *root);
1305 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1306 int btrfs_read_block_groups(struct btrfs_root *root);
1307 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1308 struct btrfs_root *root, u64 bytes_used,
1309 u64 type, u64 chunk_tree, u64 chunk_objectid,
1312 int btrfs_previous_item(struct btrfs_root *root,
1313 struct btrfs_path *path, u64 min_objectid,
1315 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1316 struct btrfs_root *root, struct extent_buffer *buf,
1317 struct extent_buffer *parent, int parent_slot,
1318 struct extent_buffer **cow_ret);
1319 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1320 struct btrfs_root *root,
1321 struct extent_buffer *buf,
1322 struct extent_buffer **cow_ret, u64 new_root_objectid);
1323 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1324 *root, struct btrfs_path *path, u32 data_size);
1325 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1326 struct btrfs_root *root,
1327 struct btrfs_path *path,
1328 u32 new_size, int from_end);
1329 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1330 *root, struct btrfs_key *key, struct btrfs_path *p, int
1332 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1333 struct btrfs_root *root, struct extent_buffer *parent,
1334 int start_slot, int cache_only, u64 *last_ret,
1335 struct btrfs_key *progress);
1336 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1337 struct btrfs_path *btrfs_alloc_path(void);
1338 void btrfs_free_path(struct btrfs_path *p);
1339 void btrfs_init_path(struct btrfs_path *p);
1340 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1341 struct btrfs_path *path, int slot, int nr);
1343 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1344 struct btrfs_root *root,
1345 struct btrfs_path *path)
1347 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1350 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1351 *root, struct btrfs_key *key, void *data, u32 data_size);
1352 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1353 struct btrfs_root *root,
1354 struct btrfs_path *path,
1355 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1357 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1358 struct btrfs_root *root,
1359 struct btrfs_path *path,
1360 struct btrfs_key *key,
1363 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1366 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1367 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1368 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1369 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1372 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1373 struct btrfs_key *key);
1374 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1375 *root, struct btrfs_key *key, struct btrfs_root_item
1377 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1378 *root, struct btrfs_key *key, struct btrfs_root_item
1380 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1381 btrfs_root_item *item, struct btrfs_key *key);
1382 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1383 struct btrfs_root *latest_root);
1385 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1386 *root, const char *name, int name_len, u64 dir,
1387 struct btrfs_key *location, u8 type);
1388 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1389 struct btrfs_root *root,
1390 struct btrfs_path *path, u64 dir,
1391 const char *name, int name_len,
1393 struct btrfs_dir_item *
1394 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1395 struct btrfs_root *root,
1396 struct btrfs_path *path, u64 dir,
1397 u64 objectid, const char *name, int name_len,
1399 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1400 struct btrfs_path *path,
1401 const char *name, int name_len);
1402 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root,
1404 struct btrfs_path *path,
1405 struct btrfs_dir_item *di);
1406 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1407 struct btrfs_root *root, const char *name,
1408 u16 name_len, const void *data, u16 data_len,
1410 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1411 struct btrfs_root *root,
1412 struct btrfs_path *path, u64 dir,
1413 const char *name, u16 name_len,
1416 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1417 struct btrfs_root *fs_root,
1418 u64 dirid, u64 *objectid);
1419 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1422 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1423 struct btrfs_root *root,
1424 const char *name, int name_len,
1425 u64 inode_objectid, u64 ref_objectid);
1426 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1427 struct btrfs_root *root,
1428 const char *name, int name_len,
1429 u64 inode_objectid, u64 ref_objectid);
1430 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1431 struct btrfs_root *root,
1432 struct btrfs_path *path, u64 objectid);
1433 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1434 *root, struct btrfs_path *path,
1435 struct btrfs_key *location, int mod);
1438 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1439 struct btrfs_root *root,
1440 u64 objectid, u64 pos, u64 offset,
1443 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1444 struct btrfs_root *root,
1445 struct btrfs_path *path, u64 objectid,
1446 u64 bytenr, int mod);
1447 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
1448 struct btrfs_root *root, struct inode *inode,
1450 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1451 struct btrfs_root *root,
1452 struct btrfs_path *path,
1453 u64 objectid, u64 offset,
1455 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1456 struct btrfs_root *root, struct btrfs_path *path,
1459 int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
1460 size_t size, struct bio *bio);
1462 static inline void dec_i_blocks(struct inode *inode, u64 dec)
1465 if (dec <= inode->i_blocks)
1466 inode->i_blocks -= dec;
1468 inode->i_blocks = 0;
1471 unsigned long btrfs_force_ra(struct address_space *mapping,
1472 struct file_ra_state *ra, struct file *file,
1473 pgoff_t offset, pgoff_t last_index);
1474 int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
1476 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
1477 int btrfs_readpage(struct file *file, struct page *page);
1478 void btrfs_delete_inode(struct inode *inode);
1479 void btrfs_put_inode(struct inode *inode);
1480 void btrfs_read_locked_inode(struct inode *inode);
1481 int btrfs_write_inode(struct inode *inode, int wait);
1482 void btrfs_dirty_inode(struct inode *inode);
1483 struct inode *btrfs_alloc_inode(struct super_block *sb);
1484 void btrfs_destroy_inode(struct inode *inode);
1485 int btrfs_init_cachep(void);
1486 void btrfs_destroy_cachep(void);
1487 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
1488 struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid,
1489 struct btrfs_root *root);
1490 struct inode *btrfs_ilookup(struct super_block *s, u64 objectid,
1492 int btrfs_commit_write(struct file *file, struct page *page,
1493 unsigned from, unsigned to);
1494 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
1495 size_t page_offset, u64 start, u64 end,
1497 int btrfs_update_inode(struct btrfs_trans_handle *trans,
1498 struct btrfs_root *root,
1499 struct inode *inode);
1501 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end);
1502 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
1503 extern struct file_operations btrfs_file_operations;
1504 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
1505 struct btrfs_root *root, struct inode *inode,
1506 u64 start, u64 end, u64 inline_limit, u64 *hint_block);
1508 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
1509 struct btrfs_root *root, int cache_only);
1512 int btrfs_init_sysfs(void);
1513 void btrfs_exit_sysfs(void);
1514 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs);
1515 int btrfs_sysfs_add_root(struct btrfs_root *root);
1516 void btrfs_sysfs_del_root(struct btrfs_root *root);
1517 void btrfs_sysfs_del_super(struct btrfs_fs_info *root);
1520 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
1521 int btrfs_delete_xattrs(struct btrfs_trans_handle *trans,
1522 struct btrfs_root *root, struct inode *inode);
1524 u64 btrfs_parse_size(char *str);