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)
409 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
411 struct btrfs_block_group_item {
414 __le64 chunk_objectid;
416 } __attribute__ ((__packed__));
418 struct btrfs_space_info {
424 struct list_head list;
427 struct btrfs_block_group_cache {
428 struct cache_extent cache;
429 struct btrfs_key key;
430 struct btrfs_block_group_item item;
431 struct btrfs_space_info *space_info;
437 struct btrfs_extent_ops {
438 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
439 u64 hint_byte, struct btrfs_key *ins);
440 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
445 struct btrfs_fs_devices;
446 struct btrfs_fs_info {
447 u8 fsid[BTRFS_FSID_SIZE];
448 struct btrfs_root *fs_root;
449 struct btrfs_root *extent_root;
450 struct btrfs_root *tree_root;
451 struct btrfs_root *chunk_root;
452 struct btrfs_root *dev_root;
454 struct extent_io_tree extent_cache;
455 struct extent_io_tree free_space_cache;
456 struct extent_io_tree block_group_cache;
457 struct extent_io_tree pinned_extents;
458 struct extent_io_tree pending_del;
459 struct extent_io_tree extent_ins;
461 /* logical->physical extent mapping */
462 struct btrfs_mapping_tree mapping_tree;
465 u64 last_trans_committed;
466 struct btrfs_trans_handle *running_transaction;
467 struct btrfs_super_block super_copy;
468 struct extent_buffer *sb_buffer;
469 struct mutex fs_mutex;
472 struct btrfs_extent_ops *extent_ops;
473 struct list_head dirty_cowonly_roots;
475 struct btrfs_fs_devices *fs_devices;
476 struct list_head space_info;
478 int force_system_allocs;
483 * in ram representation of the tree. extent_root is used for all allocations
484 * and for the extent tree extent_root root.
487 struct extent_buffer *node;
488 struct extent_buffer *commit_root;
489 struct btrfs_root_item root_item;
490 struct btrfs_key root_key;
491 struct btrfs_fs_info *fs_info;
495 /* data allocations are done in sectorsize units */
498 /* node allocations are done in nodesize units */
501 /* leaf allocations are done in leafsize units */
504 /* leaf allocations are done in leafsize units */
513 u64 last_inode_alloc;
515 /* the dirty list is only used by non-reference counted roots */
516 struct list_head dirty_list;
520 * inode items have the data typically returned from stat and store other
521 * info about object characteristics. There is one for every file and dir in
524 #define BTRFS_INODE_ITEM_KEY 1
525 #define BTRFS_INODE_REF_KEY 2
526 #define BTRFS_XATTR_ITEM_KEY 8
528 /* reserve 3-15 close to the inode for later flexibility */
531 * dir items are the name -> inode pointers in a directory. There is one
532 * for every name in a directory.
534 #define BTRFS_DIR_ITEM_KEY 16
535 #define BTRFS_DIR_INDEX_KEY 17
537 * extent data is for file data
539 #define BTRFS_EXTENT_DATA_KEY 18
541 * csum items have the checksums for data in the extents
543 #define BTRFS_CSUM_ITEM_KEY 19
545 /* reserve 20-31 for other file stuff */
548 * root items point to tree roots. There are typically in the root
549 * tree used by the super block to find all the other trees
551 #define BTRFS_ROOT_ITEM_KEY 32
553 * extent items are in the extent map tree. These record which blocks
554 * are used, and how many references there are to each block
556 #define BTRFS_EXTENT_ITEM_KEY 33
557 #define BTRFS_EXTENT_REF_KEY 34
560 * block groups give us hints into the extent allocation trees. Which
561 * blocks are free etc etc
563 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
565 #define BTRFS_DEV_EXTENT_KEY 75
566 #define BTRFS_DEV_ITEM_KEY 76
567 #define BTRFS_CHUNK_ITEM_KEY 77
570 * string items are for debugging. They just store a short string of
573 #define BTRFS_STRING_ITEM_KEY 253
577 #define BTRFS_INODE_NODATASUM (1 << 0)
578 #define BTRFS_INODE_NODATACOW (1 << 1)
579 #define BTRFS_INODE_READONLY (1 << 2)
581 #define read_eb_member(eb, ptr, type, member, result) ( \
582 read_extent_buffer(eb, (char *)(result), \
583 ((unsigned long)(ptr)) + \
584 offsetof(type, member), \
585 sizeof(((type *)0)->member)))
587 #define write_eb_member(eb, ptr, type, member, result) ( \
588 write_extent_buffer(eb, (char *)(result), \
589 ((unsigned long)(ptr)) + \
590 offsetof(type, member), \
591 sizeof(((type *)0)->member)))
593 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
594 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
596 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
597 return le##bits##_to_cpu(h->member); \
599 static inline void btrfs_set_##name(struct extent_buffer *eb, \
602 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
603 h->member = cpu_to_le##bits(val); \
606 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
607 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
610 unsigned long offset = (unsigned long)s; \
611 type *p = (type *) (eb->data + offset); \
612 return le##bits##_to_cpu(p->member); \
614 static inline void btrfs_set_##name(struct extent_buffer *eb, \
615 type *s, u##bits val) \
617 unsigned long offset = (unsigned long)s; \
618 type *p = (type *) (eb->data + offset); \
619 p->member = cpu_to_le##bits(val); \
622 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
623 static inline u##bits btrfs_##name(type *s) \
625 return le##bits##_to_cpu(s->member); \
627 static inline void btrfs_set_##name(type *s, u##bits val) \
629 s->member = cpu_to_le##bits(val); \
632 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
633 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
634 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
635 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
636 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
637 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
638 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
640 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
641 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
643 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
645 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
647 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
649 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
651 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
653 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
655 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
658 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
659 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
660 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
661 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
662 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
663 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
664 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
665 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
666 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
675 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
677 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
678 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
680 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
681 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
683 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
686 unsigned long offset = (unsigned long)c;
687 offset += offsetof(struct btrfs_chunk, stripe);
688 offset += nr * sizeof(struct btrfs_stripe);
689 return (struct btrfs_stripe *)offset;
692 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
693 struct btrfs_chunk *c, int nr)
695 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
698 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
699 struct btrfs_chunk *c, int nr,
702 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
705 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
706 struct btrfs_chunk *c, int nr)
708 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
711 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
712 struct btrfs_chunk *c, int nr,
715 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
718 /* struct btrfs_block_group_item */
719 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
721 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
723 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
725 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
727 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
728 struct btrfs_block_group_item, chunk_objectid, 64);
729 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
730 struct btrfs_block_group_item, chunk_objectid, 64);
731 BTRFS_SETGET_FUNCS(disk_block_group_flags,
732 struct btrfs_block_group_item, flags, 64);
733 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
734 struct btrfs_block_group_item, flags, 64);
736 /* struct btrfs_inode_ref */
737 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
739 /* struct btrfs_inode_item */
740 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
741 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
742 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
743 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
744 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
745 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
746 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
747 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
748 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
749 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
750 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
753 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
754 struct btrfs_inode_item, generation, 64);
755 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
756 struct btrfs_inode_item, size, 64);
757 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks,
758 struct btrfs_inode_item, nblocks, 64);
759 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
760 struct btrfs_inode_item, block_group, 64);
761 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
762 struct btrfs_inode_item, nlink, 32);
763 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
764 struct btrfs_inode_item, uid, 32);
765 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
766 struct btrfs_inode_item, gid, 32);
767 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
768 struct btrfs_inode_item, mode, 32);
769 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
770 struct btrfs_inode_item, rdev, 64);
771 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
772 struct btrfs_inode_item, flags, 16);
773 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
774 struct btrfs_inode_item, compat_flags, 16);
776 static inline struct btrfs_timespec *
777 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
779 unsigned long ptr = (unsigned long)inode_item;
780 ptr += offsetof(struct btrfs_inode_item, atime);
781 return (struct btrfs_timespec *)ptr;
784 static inline struct btrfs_timespec *
785 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
787 unsigned long ptr = (unsigned long)inode_item;
788 ptr += offsetof(struct btrfs_inode_item, mtime);
789 return (struct btrfs_timespec *)ptr;
792 static inline struct btrfs_timespec *
793 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
795 unsigned long ptr = (unsigned long)inode_item;
796 ptr += offsetof(struct btrfs_inode_item, ctime);
797 return (struct btrfs_timespec *)ptr;
800 static inline struct btrfs_timespec *
801 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
803 unsigned long ptr = (unsigned long)inode_item;
804 ptr += offsetof(struct btrfs_inode_item, otime);
805 return (struct btrfs_timespec *)ptr;
808 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
809 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
810 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
812 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
815 /* struct btrfs_dev_extent */
816 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
817 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
819 /* struct btrfs_extent_item */
820 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
822 /* struct btrfs_extent_ref */
823 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
824 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
825 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
826 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
828 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
829 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
831 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
833 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
835 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
838 /* struct btrfs_node */
839 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
840 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
842 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
845 ptr = offsetof(struct btrfs_node, ptrs) +
846 sizeof(struct btrfs_key_ptr) * nr;
847 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
850 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
854 ptr = offsetof(struct btrfs_node, ptrs) +
855 sizeof(struct btrfs_key_ptr) * nr;
856 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
859 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
862 ptr = offsetof(struct btrfs_node, ptrs) +
863 sizeof(struct btrfs_key_ptr) * nr;
864 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
867 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
871 ptr = offsetof(struct btrfs_node, ptrs) +
872 sizeof(struct btrfs_key_ptr) * nr;
873 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
876 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
878 return offsetof(struct btrfs_node, ptrs) +
879 sizeof(struct btrfs_key_ptr) * nr;
882 static inline void btrfs_node_key(struct extent_buffer *eb,
883 struct btrfs_disk_key *disk_key, int nr)
886 ptr = btrfs_node_key_ptr_offset(nr);
887 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
888 struct btrfs_key_ptr, key, disk_key);
891 static inline void btrfs_set_node_key(struct extent_buffer *eb,
892 struct btrfs_disk_key *disk_key, int nr)
895 ptr = btrfs_node_key_ptr_offset(nr);
896 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
897 struct btrfs_key_ptr, key, disk_key);
900 /* struct btrfs_item */
901 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
902 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
904 static inline unsigned long btrfs_item_nr_offset(int nr)
906 return offsetof(struct btrfs_leaf, items) +
907 sizeof(struct btrfs_item) * nr;
910 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
913 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
916 static inline u32 btrfs_item_end(struct extent_buffer *eb,
917 struct btrfs_item *item)
919 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
922 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
924 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
927 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
929 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
932 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
934 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
937 static inline void btrfs_item_key(struct extent_buffer *eb,
938 struct btrfs_disk_key *disk_key, int nr)
940 struct btrfs_item *item = btrfs_item_nr(eb, nr);
941 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
944 static inline void btrfs_set_item_key(struct extent_buffer *eb,
945 struct btrfs_disk_key *disk_key, int nr)
947 struct btrfs_item *item = btrfs_item_nr(eb, nr);
948 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
951 /* struct btrfs_dir_item */
952 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
953 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
954 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
956 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
957 struct btrfs_dir_item *item,
958 struct btrfs_disk_key *key)
960 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
963 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
964 struct btrfs_dir_item *item,
965 struct btrfs_disk_key *key)
967 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
970 /* struct btrfs_disk_key */
971 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
973 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
974 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
976 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
977 struct btrfs_disk_key *disk)
979 cpu->offset = le64_to_cpu(disk->offset);
980 cpu->type = disk->type;
981 cpu->objectid = le64_to_cpu(disk->objectid);
984 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
985 struct btrfs_key *cpu)
987 disk->offset = cpu_to_le64(cpu->offset);
988 disk->type = cpu->type;
989 disk->objectid = cpu_to_le64(cpu->objectid);
992 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
993 struct btrfs_key *key, int nr)
995 struct btrfs_disk_key disk_key;
996 btrfs_node_key(eb, &disk_key, nr);
997 btrfs_disk_key_to_cpu(key, &disk_key);
1000 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1001 struct btrfs_key *key, int nr)
1003 struct btrfs_disk_key disk_key;
1004 btrfs_item_key(eb, &disk_key, nr);
1005 btrfs_disk_key_to_cpu(key, &disk_key);
1008 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1009 struct btrfs_dir_item *item,
1010 struct btrfs_key *key)
1012 struct btrfs_disk_key disk_key;
1013 btrfs_dir_item_key(eb, item, &disk_key);
1014 btrfs_disk_key_to_cpu(key, &disk_key);
1018 static inline u8 btrfs_key_type(struct btrfs_key *key)
1023 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1028 /* struct btrfs_header */
1029 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1030 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1032 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1033 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1034 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1035 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1037 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1039 return (btrfs_header_flags(eb) & flag) == flag;
1042 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1044 u64 flags = btrfs_header_flags(eb);
1045 btrfs_set_header_flags(eb, flags | flag);
1046 return (flags & flag) == flag;
1049 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1051 u64 flags = btrfs_header_flags(eb);
1052 btrfs_set_header_flags(eb, flags & ~flag);
1053 return (flags & flag) == flag;
1056 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1058 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1062 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1064 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1068 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1070 unsigned long ptr = offsetof(struct btrfs_header, csum);
1074 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1079 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1084 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1089 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1091 return (btrfs_header_level(eb) == 0);
1094 /* struct btrfs_root_item */
1095 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1096 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1097 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1099 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1100 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1101 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1102 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1103 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1104 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1105 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1107 /* struct btrfs_super_block */
1108 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1109 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1111 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1112 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1113 struct btrfs_super_block, sys_chunk_array_size, 32);
1114 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1116 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1118 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1119 chunk_root_level, 64);
1120 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1122 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1124 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1126 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1128 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1130 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1132 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1133 root_dir_objectid, 64);
1134 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1137 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1139 return offsetof(struct btrfs_leaf, items);
1142 /* struct btrfs_file_extent_item */
1143 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1145 static inline unsigned long btrfs_file_extent_inline_start(struct
1146 btrfs_file_extent_item *e)
1148 unsigned long offset = (unsigned long)e;
1149 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1153 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1155 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1158 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1159 struct btrfs_item *e)
1161 unsigned long offset;
1162 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1163 return btrfs_item_size(eb, e) - offset;
1166 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1168 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1170 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1171 disk_num_bytes, 64);
1172 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1174 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1177 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1179 return root->leafsize;
1180 return root->nodesize;
1183 /* helper function to cast into the data area of the leaf. */
1184 #define btrfs_item_ptr(leaf, slot, type) \
1185 ((type *)(btrfs_leaf_data(leaf) + \
1186 btrfs_item_offset_nr(leaf, slot)))
1188 #define btrfs_item_ptr_offset(leaf, slot) \
1189 ((unsigned long)(btrfs_leaf_data(leaf) + \
1190 btrfs_item_offset_nr(leaf, slot)))
1193 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1194 struct btrfs_path *count_path,
1196 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1197 struct btrfs_root *root);
1198 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1199 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1200 btrfs_fs_info *info,
1202 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1203 struct btrfs_block_group_cache
1204 *hint, u64 search_start,
1205 int data, int owner);
1206 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1207 struct btrfs_root *root, u64 owner_objectid);
1208 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1209 struct btrfs_root *root, u32 size,
1211 u64 hint, u64 empty_size);
1212 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1213 struct btrfs_root *root,
1221 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1222 struct btrfs_root *root, u64 new_size);
1223 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1224 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1225 struct btrfs_root *root,
1226 struct btrfs_path *path, u64 bytenr,
1227 u64 root_objectid, u64 ref_generation,
1228 u64 owner, u64 owner_offset);
1229 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1230 struct btrfs_root *root,
1231 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1232 u64 owner, u64 owner_offset,
1233 u64 empty_size, u64 hint_byte,
1234 u64 search_end, struct btrfs_key *ins, int data);
1235 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1236 struct extent_buffer *buf);
1237 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1238 *root, u64 bytenr, u64 num_bytes,
1239 u64 root_objectid, u64 ref_generation,
1240 u64 owner_objectid, u64 owner_offset, int pin);
1241 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1242 struct btrfs_root *root,
1243 struct extent_io_tree *unpin);
1244 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1245 struct btrfs_root *root,
1246 u64 bytenr, u64 num_bytes,
1247 u64 root_objectid, u64 ref_generation,
1248 u64 owner, u64 owner_offset);
1249 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1250 struct btrfs_root *root);
1251 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1252 int btrfs_read_block_groups(struct btrfs_root *root);
1253 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1254 struct btrfs_root *root, u64 bytes_used,
1255 u64 type, u64 chunk_tree, u64 chunk_objectid,
1257 u64 btrfs_hash_extent_ref(u64 root_objectid, u64 ref_generation,
1258 u64 owner, u64 owner_offset);
1259 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1260 struct btrfs_root *root, u64 bytenr, u64 num,
1261 int alloc, int mark_free);
1263 int btrfs_previous_item(struct btrfs_root *root,
1264 struct btrfs_path *path, u64 min_objectid,
1266 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1267 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1268 struct btrfs_root *root, struct extent_buffer *buf,
1269 struct extent_buffer *parent, int parent_slot,
1270 struct extent_buffer **cow_ret);
1271 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1272 struct btrfs_root *root,
1273 struct extent_buffer *buf,
1274 struct extent_buffer **cow_ret, u64 new_root_objectid);
1275 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1276 *root, struct btrfs_path *path, u32 data_size);
1277 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1278 struct btrfs_root *root,
1279 struct btrfs_path *path,
1280 u32 new_size, int from_end);
1281 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1282 *root, struct btrfs_key *key, struct btrfs_path *p, int
1284 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1285 struct btrfs_root *root, struct extent_buffer *parent,
1286 int start_slot, int cache_only, u64 *last_ret,
1287 struct btrfs_key *progress);
1288 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1289 struct btrfs_path *btrfs_alloc_path(void);
1290 void btrfs_free_path(struct btrfs_path *p);
1291 void btrfs_init_path(struct btrfs_path *p);
1292 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1293 struct btrfs_path *path, int slot, int nr);
1295 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1296 struct btrfs_root *root,
1297 struct btrfs_path *path)
1299 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1302 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1303 *root, struct btrfs_key *key, void *data, u32 data_size);
1304 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1305 struct btrfs_root *root,
1306 struct btrfs_path *path,
1307 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1309 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1310 struct btrfs_root *root,
1311 struct btrfs_path *path,
1312 struct btrfs_key *key,
1315 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1318 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1319 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1320 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1321 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1326 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1327 struct btrfs_key *key);
1328 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1329 *root, struct btrfs_key *key, struct btrfs_root_item
1331 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1332 *root, struct btrfs_key *key, struct btrfs_root_item
1334 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1335 btrfs_root_item *item, struct btrfs_key *key);
1336 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1337 struct btrfs_root *latest_root);
1339 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1340 *root, const char *name, int name_len, u64 dir,
1341 struct btrfs_key *location, u8 type);
1342 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1343 struct btrfs_root *root,
1344 struct btrfs_path *path, u64 dir,
1345 const char *name, int name_len,
1347 struct btrfs_dir_item *
1348 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1349 struct btrfs_root *root,
1350 struct btrfs_path *path, u64 dir,
1351 u64 objectid, const char *name, int name_len,
1353 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1354 struct btrfs_path *path,
1355 const char *name, int name_len);
1356 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1357 struct btrfs_root *root,
1358 struct btrfs_path *path,
1359 struct btrfs_dir_item *di);
1360 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1361 struct btrfs_root *root, const char *name,
1362 u16 name_len, const void *data, u16 data_len,
1364 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1365 struct btrfs_root *root,
1366 struct btrfs_path *path, u64 dir,
1367 const char *name, u16 name_len,
1370 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1371 struct btrfs_root *fs_root,
1372 u64 dirid, u64 *objectid);
1373 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1376 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1377 struct btrfs_root *root,
1378 const char *name, int name_len,
1379 u64 inode_objectid, u64 ref_objectid);
1380 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1381 struct btrfs_root *root,
1382 const char *name, int name_len,
1383 u64 inode_objectid, u64 ref_objectid);
1384 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1385 struct btrfs_root *root,
1386 struct btrfs_path *path, u64 objectid);
1387 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1388 *root, u64 objectid, struct btrfs_inode_item
1390 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1391 *root, struct btrfs_path *path,
1392 struct btrfs_key *location, int mod);
1395 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1396 struct btrfs_root *root,
1397 u64 objectid, u64 pos, u64 offset,
1400 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1401 struct btrfs_root *root, u64 objectid,
1402 u64 offset, char *buffer, size_t size);
1403 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1404 struct btrfs_root *root,
1405 struct btrfs_path *path, u64 objectid,
1406 u64 bytenr, int mod);
1407 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1408 struct btrfs_root *root,
1409 struct btrfs_inode_item *inode,
1410 u64 objectid, u64 offset,
1411 char *data, size_t len);
1412 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1413 struct btrfs_root *root,
1414 struct btrfs_path *path,
1415 u64 objectid, u64 offset,
1417 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1418 struct btrfs_root *root, struct btrfs_path *path,