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
186 * every tree block (leaf or node) starts with this header.
188 struct btrfs_header {
189 u8 csum[BTRFS_CSUM_SIZE];
190 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
191 __le64 bytenr; /* which block this node is supposed to live in */
197 } __attribute__ ((__packed__));
199 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
200 sizeof(struct btrfs_header)) / \
201 sizeof(struct btrfs_key_ptr))
202 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
203 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
204 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
205 sizeof(struct btrfs_item) - \
206 sizeof(struct btrfs_file_extent_item))
209 * this is a very generous portion of the super block, giving us
210 * room to translate 14 chunks with 3 stripes each.
212 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
215 * the super block basically lists the main trees of the FS
216 * it currently lacks any block count etc etc
218 struct btrfs_super_block {
219 u8 csum[BTRFS_CSUM_SIZE];
220 /* the first 3 fields must match struct btrfs_header */
221 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
222 __le64 bytenr; /* this block number */
229 __le64 root_dir_objectid;
235 __le32 sys_chunk_array_size;
238 struct btrfs_dev_item dev_item;
239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
240 } __attribute__ ((__packed__));
243 * A leaf is full of items. offset and size tell us where to find
244 * the item in the leaf (relative to the start of the data area)
247 struct btrfs_disk_key key;
250 } __attribute__ ((__packed__));
253 * leaves have an item area and a data area:
254 * [item0, item1....itemN] [free space] [dataN...data1, data0]
256 * The data is separate from the items to get the keys closer together
260 struct btrfs_header header;
261 struct btrfs_item items[];
262 } __attribute__ ((__packed__));
265 * all non-leaf blocks are nodes, they hold only keys and pointers to
268 struct btrfs_key_ptr {
269 struct btrfs_disk_key key;
272 } __attribute__ ((__packed__));
275 struct btrfs_header header;
276 struct btrfs_key_ptr ptrs[];
277 } __attribute__ ((__packed__));
280 * btrfs_paths remember the path taken from the root down to the leaf.
281 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
282 * to any other levels that are present.
284 * The slots array records the index of the item or block pointer
285 * used while walking the tree.
288 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
289 int slots[BTRFS_MAX_LEVEL];
295 * items in the extent btree are used to record the objectid of the
296 * owner of the block and the number of references
298 struct btrfs_extent_item {
300 } __attribute__ ((__packed__));
302 struct btrfs_extent_ref {
307 } __attribute__ ((__packed__));
309 /* dev extents record free space on individual devices. The owner
310 * field points back to the chunk allocation mapping tree that allocated
313 struct btrfs_dev_extent {
316 } __attribute__ ((__packed__));
319 struct btrfs_inode_ref {
322 } __attribute__ ((__packed__));
324 struct btrfs_timespec {
327 } __attribute__ ((__packed__));
330 * there is no padding here on purpose. If you want to extent the inode,
331 * make a new item type
333 struct btrfs_inode_item {
345 struct btrfs_timespec atime;
346 struct btrfs_timespec ctime;
347 struct btrfs_timespec mtime;
348 struct btrfs_timespec otime;
349 } __attribute__ ((__packed__));
351 struct btrfs_dir_item {
352 struct btrfs_disk_key location;
356 } __attribute__ ((__packed__));
358 struct btrfs_root_item {
359 struct btrfs_inode_item inode;
366 struct btrfs_disk_key drop_progress;
369 } __attribute__ ((__packed__));
371 #define BTRFS_FILE_EXTENT_REG 0
372 #define BTRFS_FILE_EXTENT_INLINE 1
374 struct btrfs_file_extent_item {
378 * disk space consumed by the extent, checksum blocks are included
382 __le64 disk_num_bytes;
384 * the logical offset in file blocks (no csums)
385 * this extent record is for. This allows a file extent to point
386 * into the middle of an existing extent on disk, sharing it
387 * between two snapshots (useful if some bytes in the middle of the
388 * extent have changed
392 * the logical number of file blocks (no csums included)
395 } __attribute__ ((__packed__));
397 struct btrfs_csum_item {
399 } __attribute__ ((__packed__));
401 /* tag for the radix tree of block groups in ram */
402 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
403 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
404 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
406 struct btrfs_block_group_item {
409 __le64 chunk_objectid;
411 } __attribute__ ((__packed__));
413 struct btrfs_space_info {
419 struct list_head list;
422 struct btrfs_block_group_cache {
423 struct cache_extent cache;
424 struct btrfs_key key;
425 struct btrfs_block_group_item item;
426 struct btrfs_space_info *space_info;
432 struct btrfs_extent_ops {
433 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
434 u64 hint_byte, struct btrfs_key *ins);
435 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
440 struct btrfs_fs_devices;
441 struct btrfs_fs_info {
442 u8 fsid[BTRFS_FSID_SIZE];
443 struct btrfs_root *fs_root;
444 struct btrfs_root *extent_root;
445 struct btrfs_root *tree_root;
446 struct btrfs_root *chunk_root;
447 struct btrfs_root *dev_root;
449 struct extent_io_tree extent_cache;
450 struct extent_io_tree free_space_cache;
451 struct extent_io_tree block_group_cache;
452 struct extent_io_tree pinned_extents;
453 struct extent_io_tree pending_del;
454 struct extent_io_tree extent_ins;
456 /* logical->physical extent mapping */
457 struct btrfs_mapping_tree mapping_tree;
460 u64 last_trans_committed;
461 struct btrfs_trans_handle *running_transaction;
462 struct btrfs_super_block super_copy;
463 struct extent_buffer *sb_buffer;
464 struct mutex fs_mutex;
467 struct btrfs_extent_ops *extent_ops;
468 struct list_head dirty_cowonly_roots;
470 struct btrfs_fs_devices *fs_devices;
471 struct list_head space_info;
473 int force_system_allocs;
478 * in ram representation of the tree. extent_root is used for all allocations
479 * and for the extent tree extent_root root.
482 struct extent_buffer *node;
483 struct extent_buffer *commit_root;
484 struct btrfs_root_item root_item;
485 struct btrfs_key root_key;
486 struct btrfs_fs_info *fs_info;
490 /* data allocations are done in sectorsize units */
493 /* node allocations are done in nodesize units */
496 /* leaf allocations are done in leafsize units */
499 /* leaf allocations are done in leafsize units */
508 u64 last_inode_alloc;
510 /* the dirty list is only used by non-reference counted roots */
511 struct list_head dirty_list;
515 * inode items have the data typically returned from stat and store other
516 * info about object characteristics. There is one for every file and dir in
519 #define BTRFS_INODE_ITEM_KEY 1
520 #define BTRFS_INODE_REF_KEY 2
521 #define BTRFS_XATTR_ITEM_KEY 8
523 /* reserve 3-15 close to the inode for later flexibility */
526 * dir items are the name -> inode pointers in a directory. There is one
527 * for every name in a directory.
529 #define BTRFS_DIR_ITEM_KEY 16
530 #define BTRFS_DIR_INDEX_KEY 17
532 * extent data is for file data
534 #define BTRFS_EXTENT_DATA_KEY 18
536 * csum items have the checksums for data in the extents
538 #define BTRFS_CSUM_ITEM_KEY 19
540 /* reserve 20-31 for other file stuff */
543 * root items point to tree roots. There are typically in the root
544 * tree used by the super block to find all the other trees
546 #define BTRFS_ROOT_ITEM_KEY 32
548 * extent items are in the extent map tree. These record which blocks
549 * are used, and how many references there are to each block
551 #define BTRFS_EXTENT_ITEM_KEY 33
552 #define BTRFS_EXTENT_REF_KEY 34
555 * block groups give us hints into the extent allocation trees. Which
556 * blocks are free etc etc
558 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
560 #define BTRFS_DEV_EXTENT_KEY 75
561 #define BTRFS_DEV_ITEM_KEY 76
562 #define BTRFS_CHUNK_ITEM_KEY 77
565 * string items are for debugging. They just store a short string of
568 #define BTRFS_STRING_ITEM_KEY 253
572 #define BTRFS_INODE_NODATASUM (1 << 0)
573 #define BTRFS_INODE_NODATACOW (1 << 1)
574 #define BTRFS_INODE_READONLY (1 << 2)
576 #define read_eb_member(eb, ptr, type, member, result) ( \
577 read_extent_buffer(eb, (char *)(result), \
578 ((unsigned long)(ptr)) + \
579 offsetof(type, member), \
580 sizeof(((type *)0)->member)))
582 #define write_eb_member(eb, ptr, type, member, result) ( \
583 write_extent_buffer(eb, (char *)(result), \
584 ((unsigned long)(ptr)) + \
585 offsetof(type, member), \
586 sizeof(((type *)0)->member)))
588 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
589 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
591 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
592 return le##bits##_to_cpu(h->member); \
594 static inline void btrfs_set_##name(struct extent_buffer *eb, \
597 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
598 h->member = cpu_to_le##bits(val); \
601 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
602 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
605 unsigned long offset = (unsigned long)s; \
606 type *p = (type *) (eb->data + offset); \
607 return le##bits##_to_cpu(p->member); \
609 static inline void btrfs_set_##name(struct extent_buffer *eb, \
610 type *s, u##bits val) \
612 unsigned long offset = (unsigned long)s; \
613 type *p = (type *) (eb->data + offset); \
614 p->member = cpu_to_le##bits(val); \
617 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
618 static inline u##bits btrfs_##name(type *s) \
620 return le##bits##_to_cpu(s->member); \
622 static inline void btrfs_set_##name(type *s, u##bits val) \
624 s->member = cpu_to_le##bits(val); \
627 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
628 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
629 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
630 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
631 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
632 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
633 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
635 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
636 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
638 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
640 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
642 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
644 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
646 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
648 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
650 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
653 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
654 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
655 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
656 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
657 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
658 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
659 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
660 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
661 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
670 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
672 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
675 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
676 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
678 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
681 unsigned long offset = (unsigned long)c;
682 offset += offsetof(struct btrfs_chunk, stripe);
683 offset += nr * sizeof(struct btrfs_stripe);
684 return (struct btrfs_stripe *)offset;
687 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
688 struct btrfs_chunk *c, int nr)
690 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
693 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
694 struct btrfs_chunk *c, int nr,
697 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
700 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
701 struct btrfs_chunk *c, int nr)
703 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
706 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
707 struct btrfs_chunk *c, int nr,
710 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
713 /* struct btrfs_block_group_item */
714 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
716 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
718 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
720 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
722 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
723 struct btrfs_block_group_item, chunk_objectid, 64);
724 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
725 struct btrfs_block_group_item, chunk_objectid, 64);
726 BTRFS_SETGET_FUNCS(disk_block_group_flags,
727 struct btrfs_block_group_item, flags, 64);
728 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
729 struct btrfs_block_group_item, flags, 64);
731 /* struct btrfs_inode_ref */
732 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
734 /* struct btrfs_inode_item */
735 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
736 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
737 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
738 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
739 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
740 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
741 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
742 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
743 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
744 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
745 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
748 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
749 struct btrfs_inode_item, generation, 64);
750 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
751 struct btrfs_inode_item, size, 64);
752 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks,
753 struct btrfs_inode_item, nblocks, 64);
754 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
755 struct btrfs_inode_item, block_group, 64);
756 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
757 struct btrfs_inode_item, nlink, 32);
758 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
759 struct btrfs_inode_item, uid, 32);
760 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
761 struct btrfs_inode_item, gid, 32);
762 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
763 struct btrfs_inode_item, mode, 32);
764 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
765 struct btrfs_inode_item, rdev, 64);
766 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
767 struct btrfs_inode_item, flags, 16);
768 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
769 struct btrfs_inode_item, compat_flags, 16);
771 static inline struct btrfs_timespec *
772 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
774 unsigned long ptr = (unsigned long)inode_item;
775 ptr += offsetof(struct btrfs_inode_item, atime);
776 return (struct btrfs_timespec *)ptr;
779 static inline struct btrfs_timespec *
780 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
782 unsigned long ptr = (unsigned long)inode_item;
783 ptr += offsetof(struct btrfs_inode_item, mtime);
784 return (struct btrfs_timespec *)ptr;
787 static inline struct btrfs_timespec *
788 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
790 unsigned long ptr = (unsigned long)inode_item;
791 ptr += offsetof(struct btrfs_inode_item, ctime);
792 return (struct btrfs_timespec *)ptr;
795 static inline struct btrfs_timespec *
796 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
798 unsigned long ptr = (unsigned long)inode_item;
799 ptr += offsetof(struct btrfs_inode_item, otime);
800 return (struct btrfs_timespec *)ptr;
803 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
804 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
805 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
807 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
810 /* struct btrfs_dev_extent */
811 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
812 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
814 /* struct btrfs_extent_item */
815 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
817 /* struct btrfs_extent_ref */
818 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
819 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
820 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
821 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
823 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
824 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
826 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
828 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
830 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
833 /* struct btrfs_node */
834 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
835 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
837 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
840 ptr = offsetof(struct btrfs_node, ptrs) +
841 sizeof(struct btrfs_key_ptr) * nr;
842 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
845 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
849 ptr = offsetof(struct btrfs_node, ptrs) +
850 sizeof(struct btrfs_key_ptr) * nr;
851 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
854 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
857 ptr = offsetof(struct btrfs_node, ptrs) +
858 sizeof(struct btrfs_key_ptr) * nr;
859 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
862 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
866 ptr = offsetof(struct btrfs_node, ptrs) +
867 sizeof(struct btrfs_key_ptr) * nr;
868 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
871 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
873 return offsetof(struct btrfs_node, ptrs) +
874 sizeof(struct btrfs_key_ptr) * nr;
877 static inline void btrfs_node_key(struct extent_buffer *eb,
878 struct btrfs_disk_key *disk_key, int nr)
881 ptr = btrfs_node_key_ptr_offset(nr);
882 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
883 struct btrfs_key_ptr, key, disk_key);
886 static inline void btrfs_set_node_key(struct extent_buffer *eb,
887 struct btrfs_disk_key *disk_key, int nr)
890 ptr = btrfs_node_key_ptr_offset(nr);
891 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
892 struct btrfs_key_ptr, key, disk_key);
895 /* struct btrfs_item */
896 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
897 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
899 static inline unsigned long btrfs_item_nr_offset(int nr)
901 return offsetof(struct btrfs_leaf, items) +
902 sizeof(struct btrfs_item) * nr;
905 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
908 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
911 static inline u32 btrfs_item_end(struct extent_buffer *eb,
912 struct btrfs_item *item)
914 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
917 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
919 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
922 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
924 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
927 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
929 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
932 static inline void btrfs_item_key(struct extent_buffer *eb,
933 struct btrfs_disk_key *disk_key, int nr)
935 struct btrfs_item *item = btrfs_item_nr(eb, nr);
936 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
939 static inline void btrfs_set_item_key(struct extent_buffer *eb,
940 struct btrfs_disk_key *disk_key, int nr)
942 struct btrfs_item *item = btrfs_item_nr(eb, nr);
943 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
946 /* struct btrfs_dir_item */
947 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
948 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
949 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
951 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
952 struct btrfs_dir_item *item,
953 struct btrfs_disk_key *key)
955 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
958 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
959 struct btrfs_dir_item *item,
960 struct btrfs_disk_key *key)
962 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
965 /* struct btrfs_disk_key */
966 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
968 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
969 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
971 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
972 struct btrfs_disk_key *disk)
974 cpu->offset = le64_to_cpu(disk->offset);
975 cpu->type = disk->type;
976 cpu->objectid = le64_to_cpu(disk->objectid);
979 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
980 struct btrfs_key *cpu)
982 disk->offset = cpu_to_le64(cpu->offset);
983 disk->type = cpu->type;
984 disk->objectid = cpu_to_le64(cpu->objectid);
987 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
988 struct btrfs_key *key, int nr)
990 struct btrfs_disk_key disk_key;
991 btrfs_node_key(eb, &disk_key, nr);
992 btrfs_disk_key_to_cpu(key, &disk_key);
995 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
996 struct btrfs_key *key, int nr)
998 struct btrfs_disk_key disk_key;
999 btrfs_item_key(eb, &disk_key, nr);
1000 btrfs_disk_key_to_cpu(key, &disk_key);
1003 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1004 struct btrfs_dir_item *item,
1005 struct btrfs_key *key)
1007 struct btrfs_disk_key disk_key;
1008 btrfs_dir_item_key(eb, item, &disk_key);
1009 btrfs_disk_key_to_cpu(key, &disk_key);
1013 static inline u8 btrfs_key_type(struct btrfs_key *key)
1018 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1023 /* struct btrfs_header */
1024 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1025 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1027 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1028 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1029 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1030 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1032 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1034 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1038 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1040 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1044 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1046 unsigned long ptr = offsetof(struct btrfs_header, csum);
1050 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1055 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1060 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1065 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1067 return (btrfs_header_level(eb) == 0);
1070 /* struct btrfs_root_item */
1071 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1072 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1073 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1075 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1076 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1077 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1078 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1079 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1080 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1081 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1083 /* struct btrfs_super_block */
1084 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1085 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1087 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1088 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1089 struct btrfs_super_block, sys_chunk_array_size, 32);
1090 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1092 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1094 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1095 chunk_root_level, 64);
1096 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1098 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1100 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1102 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1104 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1106 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1108 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1109 root_dir_objectid, 64);
1110 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1113 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1115 return offsetof(struct btrfs_leaf, items);
1118 /* struct btrfs_file_extent_item */
1119 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1121 static inline unsigned long btrfs_file_extent_inline_start(struct
1122 btrfs_file_extent_item *e)
1124 unsigned long offset = (unsigned long)e;
1125 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1129 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1131 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1134 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1135 struct btrfs_item *e)
1137 unsigned long offset;
1138 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1139 return btrfs_item_size(eb, e) - offset;
1142 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1144 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1146 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1147 disk_num_bytes, 64);
1148 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1150 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1153 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1155 return root->leafsize;
1156 return root->nodesize;
1159 /* helper function to cast into the data area of the leaf. */
1160 #define btrfs_item_ptr(leaf, slot, type) \
1161 ((type *)(btrfs_leaf_data(leaf) + \
1162 btrfs_item_offset_nr(leaf, slot)))
1164 #define btrfs_item_ptr_offset(leaf, slot) \
1165 ((unsigned long)(btrfs_leaf_data(leaf) + \
1166 btrfs_item_offset_nr(leaf, slot)))
1169 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1170 struct btrfs_path *count_path,
1172 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1173 struct btrfs_root *root);
1174 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1175 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1176 btrfs_fs_info *info,
1178 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1179 struct btrfs_block_group_cache
1180 *hint, u64 search_start,
1181 int data, int owner);
1182 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1183 struct btrfs_root *root, u64 owner_objectid);
1184 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1185 struct btrfs_root *root, u32 size,
1187 u64 hint, u64 empty_size);
1188 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1189 struct btrfs_root *root,
1197 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1198 struct btrfs_root *root, u64 new_size);
1199 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1200 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1201 struct btrfs_root *root,
1202 struct btrfs_path *path, u64 bytenr,
1203 u64 root_objectid, u64 ref_generation,
1204 u64 owner, u64 owner_offset);
1205 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1206 struct btrfs_root *root,
1207 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1208 u64 owner, u64 owner_offset,
1209 u64 empty_size, u64 hint_byte,
1210 u64 search_end, struct btrfs_key *ins, int data);
1211 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1212 struct extent_buffer *buf);
1213 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1214 *root, u64 bytenr, u64 num_bytes,
1215 u64 root_objectid, u64 ref_generation,
1216 u64 owner_objectid, u64 owner_offset, int pin);
1217 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1218 struct btrfs_root *root,
1219 struct extent_io_tree *unpin);
1220 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1221 struct btrfs_root *root,
1222 u64 bytenr, u64 num_bytes,
1223 u64 root_objectid, u64 ref_generation,
1224 u64 owner, u64 owner_offset);
1225 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1226 struct btrfs_root *root);
1227 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1228 int btrfs_read_block_groups(struct btrfs_root *root);
1229 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1230 struct btrfs_root *root, u64 bytes_used,
1231 u64 type, u64 chunk_tree, u64 chunk_objectid,
1233 u64 btrfs_hash_extent_ref(u64 root_objectid, u64 ref_generation,
1234 u64 owner, u64 owner_offset);
1235 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1236 struct btrfs_root *root, u64 bytenr, u64 num,
1237 int alloc, int mark_free);
1239 int btrfs_previous_item(struct btrfs_root *root,
1240 struct btrfs_path *path, u64 min_objectid,
1242 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1243 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1244 struct btrfs_root *root, struct extent_buffer *buf,
1245 struct extent_buffer *parent, int parent_slot,
1246 struct extent_buffer **cow_ret);
1247 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1248 struct btrfs_root *root,
1249 struct extent_buffer *buf,
1250 struct extent_buffer **cow_ret, u64 new_root_objectid);
1251 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1252 *root, struct btrfs_path *path, u32 data_size);
1253 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1254 struct btrfs_root *root,
1255 struct btrfs_path *path,
1256 u32 new_size, int from_end);
1257 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1258 *root, struct btrfs_key *key, struct btrfs_path *p, int
1260 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1261 struct btrfs_root *root, struct extent_buffer *parent,
1262 int start_slot, int cache_only, u64 *last_ret,
1263 struct btrfs_key *progress);
1264 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1265 struct btrfs_path *btrfs_alloc_path(void);
1266 void btrfs_free_path(struct btrfs_path *p);
1267 void btrfs_init_path(struct btrfs_path *p);
1268 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1269 struct btrfs_path *path, int slot, int nr);
1271 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1272 struct btrfs_root *root,
1273 struct btrfs_path *path)
1275 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1278 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1279 *root, struct btrfs_key *key, void *data, u32 data_size);
1280 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1281 struct btrfs_root *root,
1282 struct btrfs_path *path,
1283 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1285 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1286 struct btrfs_root *root,
1287 struct btrfs_path *path,
1288 struct btrfs_key *key,
1291 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1294 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1295 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1296 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1297 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1302 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1303 struct btrfs_key *key);
1304 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1305 *root, struct btrfs_key *key, struct btrfs_root_item
1307 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1308 *root, struct btrfs_key *key, struct btrfs_root_item
1310 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1311 btrfs_root_item *item, struct btrfs_key *key);
1312 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1313 struct btrfs_root *latest_root);
1315 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1316 *root, const char *name, int name_len, u64 dir,
1317 struct btrfs_key *location, u8 type);
1318 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1319 struct btrfs_root *root,
1320 struct btrfs_path *path, u64 dir,
1321 const char *name, int name_len,
1323 struct btrfs_dir_item *
1324 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1325 struct btrfs_root *root,
1326 struct btrfs_path *path, u64 dir,
1327 u64 objectid, const char *name, int name_len,
1329 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1330 struct btrfs_path *path,
1331 const char *name, int name_len);
1332 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1333 struct btrfs_root *root,
1334 struct btrfs_path *path,
1335 struct btrfs_dir_item *di);
1336 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1337 struct btrfs_root *root, const char *name,
1338 u16 name_len, const void *data, u16 data_len,
1340 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1341 struct btrfs_root *root,
1342 struct btrfs_path *path, u64 dir,
1343 const char *name, u16 name_len,
1346 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1347 struct btrfs_root *fs_root,
1348 u64 dirid, u64 *objectid);
1349 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1352 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1353 struct btrfs_root *root,
1354 const char *name, int name_len,
1355 u64 inode_objectid, u64 ref_objectid);
1356 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1357 struct btrfs_root *root,
1358 const char *name, int name_len,
1359 u64 inode_objectid, u64 ref_objectid);
1360 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1361 struct btrfs_root *root,
1362 struct btrfs_path *path, u64 objectid);
1363 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1364 *root, u64 objectid, struct btrfs_inode_item
1366 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1367 *root, struct btrfs_path *path,
1368 struct btrfs_key *location, int mod);
1371 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1372 struct btrfs_root *root,
1373 u64 objectid, u64 pos, u64 offset,
1376 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1377 struct btrfs_root *root, u64 objectid,
1378 u64 offset, char *buffer, size_t size);
1379 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1380 struct btrfs_root *root,
1381 struct btrfs_path *path, u64 objectid,
1382 u64 bytenr, int mod);
1383 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1384 struct btrfs_root *root,
1385 struct btrfs_inode_item *inode,
1386 u64 objectid, u64 offset,
1387 char *data, size_t len);
1388 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1389 struct btrfs_root *root,
1390 struct btrfs_path *path,
1391 u64 objectid, u64 offset,
1393 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1394 struct btrfs_root *root, struct btrfs_path *path,