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.
23 #include "kerncompat.h"
24 #include "radix-tree.h"
25 #include "extent-cache.h"
26 #include "extent_io.h"
29 struct btrfs_trans_handle;
30 #define BTRFS_MAGIC "_B5RfS_M"
32 #define BTRFS_MAX_LEVEL 8
34 /* holds pointers to all of the tree roots */
35 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
37 /* stores information about which extents are in use, and reference counts */
38 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
41 * chunk tree stores translations from logical -> physical block numbering
42 * the super block points to the chunk tree
44 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
47 * stores information about which areas of a given device are in use.
48 * one per device. The tree of tree roots points to the device tree
50 #define BTRFS_DEV_TREE_OBJECTID 4ULL
52 /* one per subvolume, storing files and directories */
53 #define BTRFS_FS_TREE_OBJECTID 5ULL
55 /* directory objectid inside the root tree */
56 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
59 * All files have objectids higher than this.
61 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
65 * the device items go into the chunk tree. The key is in the form
66 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
68 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
71 * we can actually store much bigger names, but lets not confuse the rest
74 #define BTRFS_NAME_LEN 255
76 /* 32 bytes in various csum fields */
77 #define BTRFS_CSUM_SIZE 32
78 /* four bytes for CRC32 */
79 #define BTRFS_CRC32_SIZE 4
80 #define BTRFS_EMPTY_DIR_SIZE 0
82 #define BTRFS_FT_UNKNOWN 0
83 #define BTRFS_FT_REG_FILE 1
84 #define BTRFS_FT_DIR 2
85 #define BTRFS_FT_CHRDEV 3
86 #define BTRFS_FT_BLKDEV 4
87 #define BTRFS_FT_FIFO 5
88 #define BTRFS_FT_SOCK 6
89 #define BTRFS_FT_SYMLINK 7
90 #define BTRFS_FT_XATTR 8
91 #define BTRFS_FT_MAX 9
94 * the key defines the order in the tree, and so it also defines (optimal)
95 * block layout. objectid corresonds to the inode number. The flags
96 * tells us things about the object, and is a kind of stream selector.
97 * so for a given inode, keys with flags of 1 might refer to the inode
98 * data, flags of 2 may point to file data in the btree and flags == 3
99 * may point to extents.
101 * offset is the starting byte offset for this key in the stream.
103 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
104 * in cpu native order. Otherwise they are identical and their sizes
105 * should be the same (ie both packed)
107 struct btrfs_disk_key {
111 } __attribute__ ((__packed__));
117 } __attribute__ ((__packed__));
119 struct btrfs_mapping_tree {
120 struct cache_tree cache_tree;
123 #define BTRFS_DEV_UUID_SIZE 16
124 struct btrfs_dev_item {
125 /* the internal btrfs device id */
128 /* size of the device */
134 /* optimal io alignment for this device */
137 /* optimal io width for this device */
140 /* minimal io size for this device */
143 /* type and info about this device */
146 /* btrfs generated uuid for this device */
147 u8 uuid[BTRFS_DEV_UUID_SIZE];
148 } __attribute__ ((__packed__));
150 struct btrfs_stripe {
153 } __attribute__ ((__packed__));
160 /* optimal io alignment for this chunk */
163 /* optimal io width for this chunk */
166 /* minimal io size for this chunk */
169 /* 2^16 stripes is quite a lot, a second limit is the size of a single
173 struct btrfs_stripe stripe;
174 /* additional stripes go here */
175 } __attribute__ ((__packed__));
177 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
179 BUG_ON(num_stripes == 0);
180 return sizeof(struct btrfs_chunk) +
181 sizeof(struct btrfs_stripe) * (num_stripes - 1);
184 #define BTRFS_FSID_SIZE 16
185 #define BTRFS_HEADER_FLAG_WRITTEN (1 << 0)
188 * every tree block (leaf or node) starts with this header.
190 struct btrfs_header {
191 u8 csum[BTRFS_CSUM_SIZE];
192 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
193 __le64 bytenr; /* which block this node is supposed to live in */
199 } __attribute__ ((__packed__));
201 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
202 sizeof(struct btrfs_header)) / \
203 sizeof(struct btrfs_key_ptr))
204 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
205 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
206 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
207 sizeof(struct btrfs_item) - \
208 sizeof(struct btrfs_file_extent_item))
211 * this is a very generous portion of the super block, giving us
212 * room to translate 14 chunks with 3 stripes each.
214 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
217 * the super block basically lists the main trees of the FS
218 * it currently lacks any block count etc etc
220 struct btrfs_super_block {
221 u8 csum[BTRFS_CSUM_SIZE];
222 /* the first 3 fields must match struct btrfs_header */
223 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
224 __le64 bytenr; /* this block number */
232 __le64 root_dir_objectid;
238 __le32 sys_chunk_array_size;
241 struct btrfs_dev_item dev_item;
242 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
243 } __attribute__ ((__packed__));
246 * A leaf is full of items. offset and size tell us where to find
247 * the item in the leaf (relative to the start of the data area)
250 struct btrfs_disk_key key;
253 } __attribute__ ((__packed__));
256 * leaves have an item area and a data area:
257 * [item0, item1....itemN] [free space] [dataN...data1, data0]
259 * The data is separate from the items to get the keys closer together
263 struct btrfs_header header;
264 struct btrfs_item items[];
265 } __attribute__ ((__packed__));
268 * all non-leaf blocks are nodes, they hold only keys and pointers to
271 struct btrfs_key_ptr {
272 struct btrfs_disk_key key;
275 } __attribute__ ((__packed__));
278 struct btrfs_header header;
279 struct btrfs_key_ptr ptrs[];
280 } __attribute__ ((__packed__));
283 * btrfs_paths remember the path taken from the root down to the leaf.
284 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
285 * to any other levels that are present.
287 * The slots array records the index of the item or block pointer
288 * used while walking the tree.
291 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
292 int slots[BTRFS_MAX_LEVEL];
298 * items in the extent btree are used to record the objectid of the
299 * owner of the block and the number of references
301 struct btrfs_extent_item {
303 } __attribute__ ((__packed__));
305 struct btrfs_extent_ref {
310 } __attribute__ ((__packed__));
312 /* dev extents record free space on individual devices. The owner
313 * field points back to the chunk allocation mapping tree that allocated
316 struct btrfs_dev_extent {
319 } __attribute__ ((__packed__));
322 struct btrfs_inode_ref {
325 } __attribute__ ((__packed__));
327 struct btrfs_timespec {
330 } __attribute__ ((__packed__));
333 * there is no padding here on purpose. If you want to extent the inode,
334 * make a new item type
336 struct btrfs_inode_item {
348 struct btrfs_timespec atime;
349 struct btrfs_timespec ctime;
350 struct btrfs_timespec mtime;
351 struct btrfs_timespec otime;
352 } __attribute__ ((__packed__));
354 struct btrfs_dir_item {
355 struct btrfs_disk_key location;
359 } __attribute__ ((__packed__));
361 struct btrfs_root_item {
362 struct btrfs_inode_item inode;
369 struct btrfs_disk_key drop_progress;
372 } __attribute__ ((__packed__));
374 #define BTRFS_FILE_EXTENT_REG 0
375 #define BTRFS_FILE_EXTENT_INLINE 1
377 struct btrfs_file_extent_item {
381 * disk space consumed by the extent, checksum blocks are included
385 __le64 disk_num_bytes;
387 * the logical offset in file blocks (no csums)
388 * this extent record is for. This allows a file extent to point
389 * into the middle of an existing extent on disk, sharing it
390 * between two snapshots (useful if some bytes in the middle of the
391 * extent have changed
395 * the logical number of file blocks (no csums included)
398 } __attribute__ ((__packed__));
400 struct btrfs_csum_item {
402 } __attribute__ ((__packed__));
404 /* tag for the radix tree of block groups in ram */
405 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
406 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
407 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
408 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
410 struct btrfs_block_group_item {
413 __le64 chunk_objectid;
415 } __attribute__ ((__packed__));
417 struct btrfs_space_info {
423 struct list_head list;
426 struct btrfs_block_group_cache {
427 struct cache_extent cache;
428 struct btrfs_key key;
429 struct btrfs_block_group_item item;
430 struct btrfs_space_info *space_info;
436 struct btrfs_extent_ops {
437 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
438 u64 hint_byte, struct btrfs_key *ins);
439 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
444 struct btrfs_fs_devices;
445 struct btrfs_fs_info {
446 u8 fsid[BTRFS_FSID_SIZE];
447 struct btrfs_root *fs_root;
448 struct btrfs_root *extent_root;
449 struct btrfs_root *tree_root;
450 struct btrfs_root *chunk_root;
451 struct btrfs_root *dev_root;
453 struct extent_io_tree extent_cache;
454 struct extent_io_tree free_space_cache;
455 struct extent_io_tree block_group_cache;
456 struct extent_io_tree pinned_extents;
457 struct extent_io_tree pending_del;
458 struct extent_io_tree extent_ins;
460 /* logical->physical extent mapping */
461 struct btrfs_mapping_tree mapping_tree;
464 u64 last_trans_committed;
465 struct btrfs_trans_handle *running_transaction;
466 struct btrfs_super_block super_copy;
467 struct extent_buffer *sb_buffer;
468 struct mutex fs_mutex;
471 struct btrfs_extent_ops *extent_ops;
472 struct list_head dirty_cowonly_roots;
474 struct btrfs_fs_devices *fs_devices;
475 struct list_head space_info;
477 int force_system_allocs;
482 * in ram representation of the tree. extent_root is used for all allocations
483 * and for the extent tree extent_root root.
486 struct extent_buffer *node;
487 struct extent_buffer *commit_root;
488 struct btrfs_root_item root_item;
489 struct btrfs_key root_key;
490 struct btrfs_fs_info *fs_info;
494 /* data allocations are done in sectorsize units */
497 /* node allocations are done in nodesize units */
500 /* leaf allocations are done in leafsize units */
503 /* leaf allocations are done in leafsize units */
512 u64 last_inode_alloc;
514 /* the dirty list is only used by non-reference counted roots */
515 struct list_head dirty_list;
519 * inode items have the data typically returned from stat and store other
520 * info about object characteristics. There is one for every file and dir in
523 #define BTRFS_INODE_ITEM_KEY 1
524 #define BTRFS_INODE_REF_KEY 2
525 #define BTRFS_XATTR_ITEM_KEY 8
527 /* reserve 3-15 close to the inode for later flexibility */
530 * dir items are the name -> inode pointers in a directory. There is one
531 * for every name in a directory.
533 #define BTRFS_DIR_ITEM_KEY 16
534 #define BTRFS_DIR_INDEX_KEY 17
536 * extent data is for file data
538 #define BTRFS_EXTENT_DATA_KEY 18
540 * csum items have the checksums for data in the extents
542 #define BTRFS_CSUM_ITEM_KEY 19
544 /* reserve 20-31 for other file stuff */
547 * root items point to tree roots. There are typically in the root
548 * tree used by the super block to find all the other trees
550 #define BTRFS_ROOT_ITEM_KEY 32
552 * extent items are in the extent map tree. These record which blocks
553 * are used, and how many references there are to each block
555 #define BTRFS_EXTENT_ITEM_KEY 33
556 #define BTRFS_EXTENT_REF_KEY 34
559 * block groups give us hints into the extent allocation trees. Which
560 * blocks are free etc etc
562 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
564 #define BTRFS_DEV_EXTENT_KEY 75
565 #define BTRFS_DEV_ITEM_KEY 76
566 #define BTRFS_CHUNK_ITEM_KEY 77
569 * string items are for debugging. They just store a short string of
572 #define BTRFS_STRING_ITEM_KEY 253
576 #define BTRFS_INODE_NODATASUM (1 << 0)
577 #define BTRFS_INODE_NODATACOW (1 << 1)
578 #define BTRFS_INODE_READONLY (1 << 2)
580 #define read_eb_member(eb, ptr, type, member, result) ( \
581 read_extent_buffer(eb, (char *)(result), \
582 ((unsigned long)(ptr)) + \
583 offsetof(type, member), \
584 sizeof(((type *)0)->member)))
586 #define write_eb_member(eb, ptr, type, member, result) ( \
587 write_extent_buffer(eb, (char *)(result), \
588 ((unsigned long)(ptr)) + \
589 offsetof(type, member), \
590 sizeof(((type *)0)->member)))
592 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
593 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
595 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
596 return le##bits##_to_cpu(h->member); \
598 static inline void btrfs_set_##name(struct extent_buffer *eb, \
601 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
602 h->member = cpu_to_le##bits(val); \
605 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
606 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
609 unsigned long offset = (unsigned long)s; \
610 type *p = (type *) (eb->data + offset); \
611 return le##bits##_to_cpu(p->member); \
613 static inline void btrfs_set_##name(struct extent_buffer *eb, \
614 type *s, u##bits val) \
616 unsigned long offset = (unsigned long)s; \
617 type *p = (type *) (eb->data + offset); \
618 p->member = cpu_to_le##bits(val); \
621 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
622 static inline u##bits btrfs_##name(type *s) \
624 return le##bits##_to_cpu(s->member); \
626 static inline void btrfs_set_##name(type *s, u##bits val) \
628 s->member = cpu_to_le##bits(val); \
631 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
632 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
633 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
634 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
635 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
636 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
637 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
639 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
640 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
642 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
644 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
646 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
648 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
650 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
652 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
654 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
657 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
658 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
659 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
660 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
661 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
662 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
663 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
664 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
665 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
670 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
672 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
677 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
679 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
680 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
682 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
685 unsigned long offset = (unsigned long)c;
686 offset += offsetof(struct btrfs_chunk, stripe);
687 offset += nr * sizeof(struct btrfs_stripe);
688 return (struct btrfs_stripe *)offset;
691 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
692 struct btrfs_chunk *c, int nr)
694 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
697 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
698 struct btrfs_chunk *c, int nr,
701 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
704 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
705 struct btrfs_chunk *c, int nr)
707 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
710 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
711 struct btrfs_chunk *c, int nr,
714 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
717 /* struct btrfs_block_group_item */
718 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
720 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
722 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
724 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
726 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
727 struct btrfs_block_group_item, chunk_objectid, 64);
728 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
729 struct btrfs_block_group_item, chunk_objectid, 64);
730 BTRFS_SETGET_FUNCS(disk_block_group_flags,
731 struct btrfs_block_group_item, flags, 64);
732 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
733 struct btrfs_block_group_item, flags, 64);
735 /* struct btrfs_inode_ref */
736 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
738 /* struct btrfs_inode_item */
739 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
740 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
741 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
742 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
743 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
744 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
745 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
746 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
747 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
748 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
749 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
752 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
753 struct btrfs_inode_item, generation, 64);
754 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
755 struct btrfs_inode_item, size, 64);
756 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks,
757 struct btrfs_inode_item, nblocks, 64);
758 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
759 struct btrfs_inode_item, block_group, 64);
760 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
761 struct btrfs_inode_item, nlink, 32);
762 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
763 struct btrfs_inode_item, uid, 32);
764 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
765 struct btrfs_inode_item, gid, 32);
766 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
767 struct btrfs_inode_item, mode, 32);
768 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
769 struct btrfs_inode_item, rdev, 64);
770 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
771 struct btrfs_inode_item, flags, 16);
772 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
773 struct btrfs_inode_item, compat_flags, 16);
775 static inline struct btrfs_timespec *
776 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
778 unsigned long ptr = (unsigned long)inode_item;
779 ptr += offsetof(struct btrfs_inode_item, atime);
780 return (struct btrfs_timespec *)ptr;
783 static inline struct btrfs_timespec *
784 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
786 unsigned long ptr = (unsigned long)inode_item;
787 ptr += offsetof(struct btrfs_inode_item, mtime);
788 return (struct btrfs_timespec *)ptr;
791 static inline struct btrfs_timespec *
792 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
794 unsigned long ptr = (unsigned long)inode_item;
795 ptr += offsetof(struct btrfs_inode_item, ctime);
796 return (struct btrfs_timespec *)ptr;
799 static inline struct btrfs_timespec *
800 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
802 unsigned long ptr = (unsigned long)inode_item;
803 ptr += offsetof(struct btrfs_inode_item, otime);
804 return (struct btrfs_timespec *)ptr;
807 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
808 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
809 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
811 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
814 /* struct btrfs_dev_extent */
815 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
816 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
818 /* struct btrfs_extent_item */
819 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
821 /* struct btrfs_extent_ref */
822 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
823 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
824 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
825 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
827 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
828 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
830 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
832 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
834 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
837 /* struct btrfs_node */
838 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
839 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
841 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
844 ptr = offsetof(struct btrfs_node, ptrs) +
845 sizeof(struct btrfs_key_ptr) * nr;
846 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
849 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
853 ptr = offsetof(struct btrfs_node, ptrs) +
854 sizeof(struct btrfs_key_ptr) * nr;
855 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
858 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
861 ptr = offsetof(struct btrfs_node, ptrs) +
862 sizeof(struct btrfs_key_ptr) * nr;
863 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
866 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
870 ptr = offsetof(struct btrfs_node, ptrs) +
871 sizeof(struct btrfs_key_ptr) * nr;
872 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
875 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
877 return offsetof(struct btrfs_node, ptrs) +
878 sizeof(struct btrfs_key_ptr) * nr;
881 static inline void btrfs_node_key(struct extent_buffer *eb,
882 struct btrfs_disk_key *disk_key, int nr)
885 ptr = btrfs_node_key_ptr_offset(nr);
886 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
887 struct btrfs_key_ptr, key, disk_key);
890 static inline void btrfs_set_node_key(struct extent_buffer *eb,
891 struct btrfs_disk_key *disk_key, int nr)
894 ptr = btrfs_node_key_ptr_offset(nr);
895 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
896 struct btrfs_key_ptr, key, disk_key);
899 /* struct btrfs_item */
900 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
901 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
903 static inline unsigned long btrfs_item_nr_offset(int nr)
905 return offsetof(struct btrfs_leaf, items) +
906 sizeof(struct btrfs_item) * nr;
909 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
912 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
915 static inline u32 btrfs_item_end(struct extent_buffer *eb,
916 struct btrfs_item *item)
918 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
921 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
923 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
926 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
928 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
931 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
933 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
936 static inline void btrfs_item_key(struct extent_buffer *eb,
937 struct btrfs_disk_key *disk_key, int nr)
939 struct btrfs_item *item = btrfs_item_nr(eb, nr);
940 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
943 static inline void btrfs_set_item_key(struct extent_buffer *eb,
944 struct btrfs_disk_key *disk_key, int nr)
946 struct btrfs_item *item = btrfs_item_nr(eb, nr);
947 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
950 /* struct btrfs_dir_item */
951 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
952 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
953 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
955 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
956 struct btrfs_dir_item *item,
957 struct btrfs_disk_key *key)
959 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
962 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
963 struct btrfs_dir_item *item,
964 struct btrfs_disk_key *key)
966 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
969 /* struct btrfs_disk_key */
970 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
972 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
973 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
975 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
976 struct btrfs_disk_key *disk)
978 cpu->offset = le64_to_cpu(disk->offset);
979 cpu->type = disk->type;
980 cpu->objectid = le64_to_cpu(disk->objectid);
983 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
984 struct btrfs_key *cpu)
986 disk->offset = cpu_to_le64(cpu->offset);
987 disk->type = cpu->type;
988 disk->objectid = cpu_to_le64(cpu->objectid);
991 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
992 struct btrfs_key *key, int nr)
994 struct btrfs_disk_key disk_key;
995 btrfs_node_key(eb, &disk_key, nr);
996 btrfs_disk_key_to_cpu(key, &disk_key);
999 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1000 struct btrfs_key *key, int nr)
1002 struct btrfs_disk_key disk_key;
1003 btrfs_item_key(eb, &disk_key, nr);
1004 btrfs_disk_key_to_cpu(key, &disk_key);
1007 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1008 struct btrfs_dir_item *item,
1009 struct btrfs_key *key)
1011 struct btrfs_disk_key disk_key;
1012 btrfs_dir_item_key(eb, item, &disk_key);
1013 btrfs_disk_key_to_cpu(key, &disk_key);
1017 static inline u8 btrfs_key_type(struct btrfs_key *key)
1022 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1027 /* struct btrfs_header */
1028 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1029 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1031 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1032 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1033 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1034 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1036 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1038 return (btrfs_header_flags(eb) & flag) == flag;
1041 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1043 u64 flags = btrfs_header_flags(eb);
1044 btrfs_set_header_flags(eb, flags | flag);
1045 return (flags & flag) == flag;
1048 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1050 u64 flags = btrfs_header_flags(eb);
1051 btrfs_set_header_flags(eb, flags & ~flag);
1052 return (flags & flag) == flag;
1055 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1057 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1061 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1063 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1067 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1069 unsigned long ptr = offsetof(struct btrfs_header, csum);
1073 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1078 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1083 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1088 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1090 return (btrfs_header_level(eb) == 0);
1093 /* struct btrfs_root_item */
1094 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1095 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1096 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1098 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1099 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1100 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1101 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1102 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1103 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1104 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1106 /* struct btrfs_super_block */
1107 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1108 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1110 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1111 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1112 struct btrfs_super_block, sys_chunk_array_size, 32);
1113 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1115 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1117 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1118 chunk_root_level, 64);
1119 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1121 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1123 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1125 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1127 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1129 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1131 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1132 root_dir_objectid, 64);
1133 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1136 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1138 return offsetof(struct btrfs_leaf, items);
1141 /* struct btrfs_file_extent_item */
1142 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1144 static inline unsigned long btrfs_file_extent_inline_start(struct
1145 btrfs_file_extent_item *e)
1147 unsigned long offset = (unsigned long)e;
1148 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1152 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1154 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1157 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1158 struct btrfs_item *e)
1160 unsigned long offset;
1161 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1162 return btrfs_item_size(eb, e) - offset;
1165 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1167 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1169 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1170 disk_num_bytes, 64);
1171 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1173 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1176 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1178 return root->leafsize;
1179 return root->nodesize;
1182 /* helper function to cast into the data area of the leaf. */
1183 #define btrfs_item_ptr(leaf, slot, type) \
1184 ((type *)(btrfs_leaf_data(leaf) + \
1185 btrfs_item_offset_nr(leaf, slot)))
1187 #define btrfs_item_ptr_offset(leaf, slot) \
1188 ((unsigned long)(btrfs_leaf_data(leaf) + \
1189 btrfs_item_offset_nr(leaf, slot)))
1192 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1193 struct btrfs_path *count_path,
1195 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1196 struct btrfs_root *root);
1197 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1198 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1199 btrfs_fs_info *info,
1201 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1202 struct btrfs_block_group_cache
1203 *hint, u64 search_start,
1204 int data, int owner);
1205 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1206 struct btrfs_root *root, u64 owner_objectid);
1207 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1208 struct btrfs_root *root, u32 size,
1210 u64 hint, u64 empty_size);
1211 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1212 struct btrfs_root *root,
1220 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1221 struct btrfs_root *root, u64 new_size);
1222 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1223 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1224 struct btrfs_root *root,
1225 struct btrfs_path *path, u64 bytenr,
1226 u64 root_objectid, u64 ref_generation,
1227 u64 owner, u64 owner_offset);
1228 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1229 struct btrfs_root *root,
1230 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1231 u64 owner, u64 owner_offset,
1232 u64 empty_size, u64 hint_byte,
1233 u64 search_end, struct btrfs_key *ins, int data);
1234 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1235 struct extent_buffer *buf);
1236 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1237 *root, u64 bytenr, u64 num_bytes,
1238 u64 root_objectid, u64 ref_generation,
1239 u64 owner_objectid, u64 owner_offset, int pin);
1240 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1241 struct btrfs_root *root,
1242 struct extent_io_tree *unpin);
1243 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1244 struct btrfs_root *root,
1245 u64 bytenr, u64 num_bytes,
1246 u64 root_objectid, u64 ref_generation,
1247 u64 owner, u64 owner_offset);
1248 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1249 struct btrfs_root *root);
1250 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1251 int btrfs_read_block_groups(struct btrfs_root *root);
1252 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1253 struct btrfs_root *root, u64 bytes_used,
1254 u64 type, u64 chunk_tree, u64 chunk_objectid,
1256 u64 btrfs_hash_extent_ref(u64 root_objectid, u64 ref_generation,
1257 u64 owner, u64 owner_offset);
1258 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1259 struct btrfs_root *root, u64 bytenr, u64 num,
1260 int alloc, int mark_free);
1262 int btrfs_previous_item(struct btrfs_root *root,
1263 struct btrfs_path *path, u64 min_objectid,
1265 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1266 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1267 struct btrfs_root *root, struct extent_buffer *buf,
1268 struct extent_buffer *parent, int parent_slot,
1269 struct extent_buffer **cow_ret);
1270 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1271 struct btrfs_root *root,
1272 struct extent_buffer *buf,
1273 struct extent_buffer **cow_ret, u64 new_root_objectid);
1274 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1275 *root, struct btrfs_path *path, u32 data_size);
1276 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1277 struct btrfs_root *root,
1278 struct btrfs_path *path,
1279 u32 new_size, int from_end);
1280 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1281 *root, struct btrfs_key *key, struct btrfs_path *p, int
1283 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1284 struct btrfs_root *root, struct extent_buffer *parent,
1285 int start_slot, int cache_only, u64 *last_ret,
1286 struct btrfs_key *progress);
1287 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1288 struct btrfs_path *btrfs_alloc_path(void);
1289 void btrfs_free_path(struct btrfs_path *p);
1290 void btrfs_init_path(struct btrfs_path *p);
1291 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1292 struct btrfs_path *path, int slot, int nr);
1294 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1295 struct btrfs_root *root,
1296 struct btrfs_path *path)
1298 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1301 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1302 *root, struct btrfs_key *key, void *data, u32 data_size);
1303 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1304 struct btrfs_root *root,
1305 struct btrfs_path *path,
1306 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1308 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1309 struct btrfs_root *root,
1310 struct btrfs_path *path,
1311 struct btrfs_key *key,
1314 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1317 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1318 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1319 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1320 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1325 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1326 struct btrfs_key *key);
1327 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1328 *root, struct btrfs_key *key, struct btrfs_root_item
1330 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1331 *root, struct btrfs_key *key, struct btrfs_root_item
1333 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1334 btrfs_root_item *item, struct btrfs_key *key);
1335 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1336 struct btrfs_root *latest_root);
1338 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1339 *root, const char *name, int name_len, u64 dir,
1340 struct btrfs_key *location, u8 type);
1341 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1342 struct btrfs_root *root,
1343 struct btrfs_path *path, u64 dir,
1344 const char *name, int name_len,
1346 struct btrfs_dir_item *
1347 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1348 struct btrfs_root *root,
1349 struct btrfs_path *path, u64 dir,
1350 u64 objectid, const char *name, int name_len,
1352 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1353 struct btrfs_path *path,
1354 const char *name, int name_len);
1355 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1356 struct btrfs_root *root,
1357 struct btrfs_path *path,
1358 struct btrfs_dir_item *di);
1359 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1360 struct btrfs_root *root, const char *name,
1361 u16 name_len, const void *data, u16 data_len,
1363 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1364 struct btrfs_root *root,
1365 struct btrfs_path *path, u64 dir,
1366 const char *name, u16 name_len,
1369 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1370 struct btrfs_root *fs_root,
1371 u64 dirid, u64 *objectid);
1372 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1375 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1376 struct btrfs_root *root,
1377 const char *name, int name_len,
1378 u64 inode_objectid, u64 ref_objectid);
1379 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1380 struct btrfs_root *root,
1381 const char *name, int name_len,
1382 u64 inode_objectid, u64 ref_objectid);
1383 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1384 struct btrfs_root *root,
1385 struct btrfs_path *path, u64 objectid);
1386 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1387 *root, u64 objectid, struct btrfs_inode_item
1389 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1390 *root, struct btrfs_path *path,
1391 struct btrfs_key *location, int mod);
1394 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1395 struct btrfs_root *root,
1396 u64 objectid, u64 pos, u64 offset,
1399 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1400 struct btrfs_root *root, u64 objectid,
1401 u64 offset, char *buffer, size_t size);
1402 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1403 struct btrfs_root *root,
1404 struct btrfs_path *path, u64 objectid,
1405 u64 bytenr, int mod);
1406 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1407 struct btrfs_root *root,
1408 struct btrfs_inode_item *inode,
1409 u64 objectid, u64 offset,
1410 char *data, size_t len);
1411 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1412 struct btrfs_root *root,
1413 struct btrfs_path *path,
1414 u64 objectid, u64 offset,
1416 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1417 struct btrfs_root *root, struct btrfs_path *path,