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 "_B4RfS_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;
234 __le32 sys_chunk_array_size;
237 struct btrfs_dev_item dev_item;
238 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
239 } __attribute__ ((__packed__));
242 * A leaf is full of items. offset and size tell us where to find
243 * the item in the leaf (relative to the start of the data area)
246 struct btrfs_disk_key key;
249 } __attribute__ ((__packed__));
252 * leaves have an item area and a data area:
253 * [item0, item1....itemN] [free space] [dataN...data1, data0]
255 * The data is separate from the items to get the keys closer together
259 struct btrfs_header header;
260 struct btrfs_item items[];
261 } __attribute__ ((__packed__));
264 * all non-leaf blocks are nodes, they hold only keys and pointers to
267 struct btrfs_key_ptr {
268 struct btrfs_disk_key key;
271 } __attribute__ ((__packed__));
274 struct btrfs_header header;
275 struct btrfs_key_ptr ptrs[];
276 } __attribute__ ((__packed__));
279 * btrfs_paths remember the path taken from the root down to the leaf.
280 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
281 * to any other levels that are present.
283 * The slots array records the index of the item or block pointer
284 * used while walking the tree.
287 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
288 int slots[BTRFS_MAX_LEVEL];
294 * items in the extent btree are used to record the objectid of the
295 * owner of the block and the number of references
297 struct btrfs_extent_item {
299 } __attribute__ ((__packed__));
301 struct btrfs_extent_ref {
306 } __attribute__ ((__packed__));
308 /* dev extents record free space on individual devices. The owner
309 * field points back to the chunk allocation mapping tree that allocated
312 struct btrfs_dev_extent {
315 } __attribute__ ((__packed__));
318 struct btrfs_inode_ref {
321 } __attribute__ ((__packed__));
323 struct btrfs_timespec {
326 } __attribute__ ((__packed__));
329 * there is no padding here on purpose. If you want to extent the inode,
330 * make a new item type
332 struct btrfs_inode_item {
344 struct btrfs_timespec atime;
345 struct btrfs_timespec ctime;
346 struct btrfs_timespec mtime;
347 struct btrfs_timespec otime;
348 } __attribute__ ((__packed__));
350 struct btrfs_dir_item {
351 struct btrfs_disk_key location;
355 } __attribute__ ((__packed__));
357 struct btrfs_root_item {
358 struct btrfs_inode_item inode;
365 struct btrfs_disk_key drop_progress;
368 } __attribute__ ((__packed__));
370 #define BTRFS_FILE_EXTENT_REG 0
371 #define BTRFS_FILE_EXTENT_INLINE 1
373 struct btrfs_file_extent_item {
377 * disk space consumed by the extent, checksum blocks are included
381 __le64 disk_num_bytes;
383 * the logical offset in file blocks (no csums)
384 * this extent record is for. This allows a file extent to point
385 * into the middle of an existing extent on disk, sharing it
386 * between two snapshots (useful if some bytes in the middle of the
387 * extent have changed
391 * the logical number of file blocks (no csums included)
394 } __attribute__ ((__packed__));
396 struct btrfs_csum_item {
398 } __attribute__ ((__packed__));
400 /* tag for the radix tree of block groups in ram */
401 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
402 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
403 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
405 struct btrfs_block_group_item {
408 __le64 chunk_objectid;
410 } __attribute__ ((__packed__));
412 struct btrfs_space_info {
418 struct list_head list;
421 struct btrfs_block_group_cache {
422 struct cache_extent cache;
423 struct btrfs_key key;
424 struct btrfs_block_group_item item;
425 struct btrfs_space_info *space_info;
431 struct btrfs_extent_ops {
432 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
433 u64 hint_byte, struct btrfs_key *ins);
434 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
439 struct btrfs_fs_info {
440 u8 fsid[BTRFS_FSID_SIZE];
441 struct btrfs_root *fs_root;
442 struct btrfs_root *extent_root;
443 struct btrfs_root *tree_root;
444 struct btrfs_root *chunk_root;
445 struct btrfs_root *dev_root;
447 struct extent_io_tree extent_cache;
448 struct extent_io_tree free_space_cache;
449 struct extent_io_tree block_group_cache;
450 struct extent_io_tree pinned_extents;
451 struct extent_io_tree pending_del;
452 struct extent_io_tree extent_ins;
454 /* logical->physical extent mapping */
455 struct btrfs_mapping_tree mapping_tree;
458 u64 last_trans_committed;
459 struct btrfs_trans_handle *running_transaction;
460 struct btrfs_super_block super_copy;
461 struct extent_buffer *sb_buffer;
462 struct mutex fs_mutex;
465 struct btrfs_extent_ops *extent_ops;
466 struct list_head dirty_cowonly_roots;
468 struct list_head devices;
469 struct list_head space_info;
471 int force_system_allocs;
476 * in ram representation of the tree. extent_root is used for all allocations
477 * and for the extent tree extent_root root.
480 struct extent_buffer *node;
481 struct extent_buffer *commit_root;
482 struct btrfs_root_item root_item;
483 struct btrfs_key root_key;
484 struct btrfs_fs_info *fs_info;
488 /* data allocations are done in sectorsize units */
491 /* node allocations are done in nodesize units */
494 /* leaf allocations are done in leafsize units */
497 /* leaf allocations are done in leafsize units */
506 u64 last_inode_alloc;
508 /* the dirty list is only used by non-reference counted roots */
509 struct list_head dirty_list;
513 * inode items have the data typically returned from stat and store other
514 * info about object characteristics. There is one for every file and dir in
517 #define BTRFS_INODE_ITEM_KEY 1
518 #define BTRFS_INODE_REF_KEY 2
519 #define BTRFS_XATTR_ITEM_KEY 8
521 /* reserve 3-15 close to the inode for later flexibility */
524 * dir items are the name -> inode pointers in a directory. There is one
525 * for every name in a directory.
527 #define BTRFS_DIR_ITEM_KEY 16
528 #define BTRFS_DIR_INDEX_KEY 17
530 * extent data is for file data
532 #define BTRFS_EXTENT_DATA_KEY 18
534 * csum items have the checksums for data in the extents
536 #define BTRFS_CSUM_ITEM_KEY 19
538 /* reserve 20-31 for other file stuff */
541 * root items point to tree roots. There are typically in the root
542 * tree used by the super block to find all the other trees
544 #define BTRFS_ROOT_ITEM_KEY 32
546 * extent items are in the extent map tree. These record which blocks
547 * are used, and how many references there are to each block
549 #define BTRFS_EXTENT_ITEM_KEY 33
550 #define BTRFS_EXTENT_REF_KEY 34
553 * block groups give us hints into the extent allocation trees. Which
554 * blocks are free etc etc
556 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
558 #define BTRFS_DEV_EXTENT_KEY 75
559 #define BTRFS_DEV_ITEM_KEY 76
560 #define BTRFS_CHUNK_ITEM_KEY 77
563 * string items are for debugging. They just store a short string of
566 #define BTRFS_STRING_ITEM_KEY 253
570 #define BTRFS_INODE_NODATASUM (1 << 0)
571 #define BTRFS_INODE_NODATACOW (1 << 1)
572 #define BTRFS_INODE_READONLY (1 << 2)
574 #define read_eb_member(eb, ptr, type, member, result) ( \
575 read_extent_buffer(eb, (char *)(result), \
576 ((unsigned long)(ptr)) + \
577 offsetof(type, member), \
578 sizeof(((type *)0)->member)))
580 #define write_eb_member(eb, ptr, type, member, result) ( \
581 write_extent_buffer(eb, (char *)(result), \
582 ((unsigned long)(ptr)) + \
583 offsetof(type, member), \
584 sizeof(((type *)0)->member)))
586 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
587 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
589 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
590 return le##bits##_to_cpu(h->member); \
592 static inline void btrfs_set_##name(struct extent_buffer *eb, \
595 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
596 h->member = cpu_to_le##bits(val); \
599 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
600 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
603 unsigned long offset = (unsigned long)s; \
604 type *p = (type *) (eb->data + offset); \
605 return le##bits##_to_cpu(p->member); \
607 static inline void btrfs_set_##name(struct extent_buffer *eb, \
608 type *s, u##bits val) \
610 unsigned long offset = (unsigned long)s; \
611 type *p = (type *) (eb->data + offset); \
612 p->member = cpu_to_le##bits(val); \
615 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
616 static inline u##bits btrfs_##name(type *s) \
618 return le##bits##_to_cpu(s->member); \
620 static inline void btrfs_set_##name(type *s, u##bits val) \
622 s->member = cpu_to_le##bits(val); \
625 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
626 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
627 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
628 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
629 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
630 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
631 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
633 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
635 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
638 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
639 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
640 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
641 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
642 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
643 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
644 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
645 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
646 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
649 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
660 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
661 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
663 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
666 unsigned long offset = (unsigned long)c;
667 offset += offsetof(struct btrfs_chunk, stripe);
668 offset += nr * sizeof(struct btrfs_stripe);
669 return (struct btrfs_stripe *)offset;
672 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
673 struct btrfs_chunk *c, int nr)
675 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
678 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
679 struct btrfs_chunk *c, int nr,
682 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
685 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
686 struct btrfs_chunk *c, int nr)
688 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
691 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
692 struct btrfs_chunk *c, int nr,
695 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
698 /* struct btrfs_block_group_item */
699 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
701 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
703 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
705 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
707 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
708 struct btrfs_block_group_item, chunk_objectid, 64);
709 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
710 struct btrfs_block_group_item, chunk_objectid, 64);
711 BTRFS_SETGET_FUNCS(disk_block_group_flags,
712 struct btrfs_block_group_item, flags, 64);
713 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
714 struct btrfs_block_group_item, flags, 64);
716 /* struct btrfs_inode_ref */
717 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
719 /* struct btrfs_inode_item */
720 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
721 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
722 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
723 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
724 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
725 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
726 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
727 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
728 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
729 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
730 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
733 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
734 struct btrfs_inode_item, generation, 64);
735 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
736 struct btrfs_inode_item, size, 64);
737 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks,
738 struct btrfs_inode_item, nblocks, 64);
739 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
740 struct btrfs_inode_item, block_group, 64);
741 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
742 struct btrfs_inode_item, nlink, 32);
743 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
744 struct btrfs_inode_item, uid, 32);
745 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
746 struct btrfs_inode_item, gid, 32);
747 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
748 struct btrfs_inode_item, mode, 32);
749 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
750 struct btrfs_inode_item, rdev, 64);
751 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
752 struct btrfs_inode_item, flags, 16);
753 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
754 struct btrfs_inode_item, compat_flags, 16);
756 static inline struct btrfs_timespec *
757 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
759 unsigned long ptr = (unsigned long)inode_item;
760 ptr += offsetof(struct btrfs_inode_item, atime);
761 return (struct btrfs_timespec *)ptr;
764 static inline struct btrfs_timespec *
765 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
767 unsigned long ptr = (unsigned long)inode_item;
768 ptr += offsetof(struct btrfs_inode_item, mtime);
769 return (struct btrfs_timespec *)ptr;
772 static inline struct btrfs_timespec *
773 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
775 unsigned long ptr = (unsigned long)inode_item;
776 ptr += offsetof(struct btrfs_inode_item, ctime);
777 return (struct btrfs_timespec *)ptr;
780 static inline struct btrfs_timespec *
781 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
783 unsigned long ptr = (unsigned long)inode_item;
784 ptr += offsetof(struct btrfs_inode_item, otime);
785 return (struct btrfs_timespec *)ptr;
788 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
789 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
790 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
792 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
795 /* struct btrfs_dev_extent */
796 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
797 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
799 /* struct btrfs_extent_item */
800 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
802 /* struct btrfs_extent_ref */
803 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
804 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
805 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
806 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
808 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
809 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
811 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
813 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
815 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
818 /* struct btrfs_node */
819 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
820 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
822 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
825 ptr = offsetof(struct btrfs_node, ptrs) +
826 sizeof(struct btrfs_key_ptr) * nr;
827 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
830 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
834 ptr = offsetof(struct btrfs_node, ptrs) +
835 sizeof(struct btrfs_key_ptr) * nr;
836 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
839 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
842 ptr = offsetof(struct btrfs_node, ptrs) +
843 sizeof(struct btrfs_key_ptr) * nr;
844 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
847 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
851 ptr = offsetof(struct btrfs_node, ptrs) +
852 sizeof(struct btrfs_key_ptr) * nr;
853 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
856 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
858 return offsetof(struct btrfs_node, ptrs) +
859 sizeof(struct btrfs_key_ptr) * nr;
862 static inline void btrfs_node_key(struct extent_buffer *eb,
863 struct btrfs_disk_key *disk_key, int nr)
866 ptr = btrfs_node_key_ptr_offset(nr);
867 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
868 struct btrfs_key_ptr, key, disk_key);
871 static inline void btrfs_set_node_key(struct extent_buffer *eb,
872 struct btrfs_disk_key *disk_key, int nr)
875 ptr = btrfs_node_key_ptr_offset(nr);
876 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
877 struct btrfs_key_ptr, key, disk_key);
880 /* struct btrfs_item */
881 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
882 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
884 static inline unsigned long btrfs_item_nr_offset(int nr)
886 return offsetof(struct btrfs_leaf, items) +
887 sizeof(struct btrfs_item) * nr;
890 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
893 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
896 static inline u32 btrfs_item_end(struct extent_buffer *eb,
897 struct btrfs_item *item)
899 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
902 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
904 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
907 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
909 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
912 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
914 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
917 static inline void btrfs_item_key(struct extent_buffer *eb,
918 struct btrfs_disk_key *disk_key, int nr)
920 struct btrfs_item *item = btrfs_item_nr(eb, nr);
921 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
924 static inline void btrfs_set_item_key(struct extent_buffer *eb,
925 struct btrfs_disk_key *disk_key, int nr)
927 struct btrfs_item *item = btrfs_item_nr(eb, nr);
928 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
931 /* struct btrfs_dir_item */
932 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
933 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
934 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
936 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
937 struct btrfs_dir_item *item,
938 struct btrfs_disk_key *key)
940 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
943 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
944 struct btrfs_dir_item *item,
945 struct btrfs_disk_key *key)
947 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
950 /* struct btrfs_disk_key */
951 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
953 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
954 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
956 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
957 struct btrfs_disk_key *disk)
959 cpu->offset = le64_to_cpu(disk->offset);
960 cpu->type = disk->type;
961 cpu->objectid = le64_to_cpu(disk->objectid);
964 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
965 struct btrfs_key *cpu)
967 disk->offset = cpu_to_le64(cpu->offset);
968 disk->type = cpu->type;
969 disk->objectid = cpu_to_le64(cpu->objectid);
972 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
973 struct btrfs_key *key, int nr)
975 struct btrfs_disk_key disk_key;
976 btrfs_node_key(eb, &disk_key, nr);
977 btrfs_disk_key_to_cpu(key, &disk_key);
980 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
981 struct btrfs_key *key, int nr)
983 struct btrfs_disk_key disk_key;
984 btrfs_item_key(eb, &disk_key, nr);
985 btrfs_disk_key_to_cpu(key, &disk_key);
988 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
989 struct btrfs_dir_item *item,
990 struct btrfs_key *key)
992 struct btrfs_disk_key disk_key;
993 btrfs_dir_item_key(eb, item, &disk_key);
994 btrfs_disk_key_to_cpu(key, &disk_key);
998 static inline u8 btrfs_key_type(struct btrfs_key *key)
1003 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1008 /* struct btrfs_header */
1009 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1010 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1012 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1013 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1014 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1015 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1017 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1019 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1023 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1025 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1029 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1031 unsigned long ptr = offsetof(struct btrfs_header, csum);
1035 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1040 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1045 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1050 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1052 return (btrfs_header_level(eb) == 0);
1055 /* struct btrfs_root_item */
1056 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1057 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1058 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1060 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1061 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1062 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1063 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1064 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1065 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1066 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1068 /* struct btrfs_super_block */
1069 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1070 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1072 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1073 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1074 struct btrfs_super_block, sys_chunk_array_size, 32);
1075 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1077 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1079 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1080 chunk_root_level, 64);
1081 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1083 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1085 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1087 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1089 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1091 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1093 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1094 root_dir_objectid, 64);
1096 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1098 return offsetof(struct btrfs_leaf, items);
1101 /* struct btrfs_file_extent_item */
1102 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1104 static inline unsigned long btrfs_file_extent_inline_start(struct
1105 btrfs_file_extent_item *e)
1107 unsigned long offset = (unsigned long)e;
1108 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1112 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1114 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1117 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1118 struct btrfs_item *e)
1120 unsigned long offset;
1121 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1122 return btrfs_item_size(eb, e) - offset;
1125 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1127 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1129 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1130 disk_num_bytes, 64);
1131 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1133 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1136 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1138 return root->leafsize;
1139 return root->nodesize;
1142 /* helper function to cast into the data area of the leaf. */
1143 #define btrfs_item_ptr(leaf, slot, type) \
1144 ((type *)(btrfs_leaf_data(leaf) + \
1145 btrfs_item_offset_nr(leaf, slot)))
1147 #define btrfs_item_ptr_offset(leaf, slot) \
1148 ((unsigned long)(btrfs_leaf_data(leaf) + \
1149 btrfs_item_offset_nr(leaf, slot)))
1152 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1153 struct btrfs_path *count_path,
1155 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1156 struct btrfs_root *root);
1157 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1158 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1159 btrfs_fs_info *info,
1161 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1162 struct btrfs_block_group_cache
1163 *hint, u64 search_start,
1164 int data, int owner);
1165 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1166 struct btrfs_root *root, u64 owner_objectid);
1167 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1168 struct btrfs_root *root, u32 size,
1170 u64 hint, u64 empty_size);
1171 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1172 struct btrfs_root *root,
1180 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1181 struct btrfs_root *root, u64 new_size);
1182 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1183 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1184 struct btrfs_root *root,
1185 struct btrfs_path *path, u64 bytenr,
1186 u64 root_objectid, u64 ref_generation,
1187 u64 owner, u64 owner_offset);
1188 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1189 struct btrfs_root *root,
1190 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1191 u64 owner, u64 owner_offset,
1192 u64 empty_size, u64 hint_byte,
1193 u64 search_end, struct btrfs_key *ins, int data);
1194 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1195 struct extent_buffer *buf);
1196 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1197 *root, u64 bytenr, u64 num_bytes,
1198 u64 root_objectid, u64 ref_generation,
1199 u64 owner_objectid, u64 owner_offset, int pin);
1200 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1201 struct btrfs_root *root,
1202 struct extent_io_tree *unpin);
1203 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1204 struct btrfs_root *root,
1205 u64 bytenr, u64 num_bytes,
1206 u64 root_objectid, u64 ref_generation,
1207 u64 owner, u64 owner_offset);
1208 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1209 struct btrfs_root *root);
1210 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1211 int btrfs_read_block_groups(struct btrfs_root *root);
1212 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1213 struct btrfs_root *root, u64 bytes_used,
1214 u64 type, u64 chunk_tree, u64 chunk_objectid,
1216 u64 btrfs_hash_extent_ref(u64 root_objectid, u64 ref_generation,
1217 u64 owner, u64 owner_offset);
1218 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1219 struct btrfs_root *root, u64 bytenr, u64 num,
1220 int alloc, int mark_free);
1222 int btrfs_previous_item(struct btrfs_root *root,
1223 struct btrfs_path *path, u64 min_objectid,
1225 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1226 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1227 struct btrfs_root *root, struct extent_buffer *buf,
1228 struct extent_buffer *parent, int parent_slot,
1229 struct extent_buffer **cow_ret);
1230 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1231 struct btrfs_root *root,
1232 struct extent_buffer *buf,
1233 struct extent_buffer **cow_ret, u64 new_root_objectid);
1234 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1235 *root, struct btrfs_path *path, u32 data_size);
1236 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1237 struct btrfs_root *root,
1238 struct btrfs_path *path,
1239 u32 new_size, int from_end);
1240 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1241 *root, struct btrfs_key *key, struct btrfs_path *p, int
1243 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1244 struct btrfs_root *root, struct extent_buffer *parent,
1245 int start_slot, int cache_only, u64 *last_ret,
1246 struct btrfs_key *progress);
1247 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1248 struct btrfs_path *btrfs_alloc_path(void);
1249 void btrfs_free_path(struct btrfs_path *p);
1250 void btrfs_init_path(struct btrfs_path *p);
1251 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1252 struct btrfs_path *path, int slot, int nr);
1254 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1255 struct btrfs_root *root,
1256 struct btrfs_path *path)
1258 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1261 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1262 *root, struct btrfs_key *key, void *data, u32 data_size);
1263 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1264 struct btrfs_root *root,
1265 struct btrfs_path *path,
1266 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1268 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1269 struct btrfs_root *root,
1270 struct btrfs_path *path,
1271 struct btrfs_key *key,
1274 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1277 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1278 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1279 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1280 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1285 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1286 struct btrfs_key *key);
1287 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1288 *root, struct btrfs_key *key, struct btrfs_root_item
1290 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1291 *root, struct btrfs_key *key, struct btrfs_root_item
1293 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1294 btrfs_root_item *item, struct btrfs_key *key);
1295 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1296 struct btrfs_root *latest_root);
1298 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1299 *root, const char *name, int name_len, u64 dir,
1300 struct btrfs_key *location, u8 type);
1301 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1302 struct btrfs_root *root,
1303 struct btrfs_path *path, u64 dir,
1304 const char *name, int name_len,
1306 struct btrfs_dir_item *
1307 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1308 struct btrfs_root *root,
1309 struct btrfs_path *path, u64 dir,
1310 u64 objectid, const char *name, int name_len,
1312 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1313 struct btrfs_path *path,
1314 const char *name, int name_len);
1315 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1316 struct btrfs_root *root,
1317 struct btrfs_path *path,
1318 struct btrfs_dir_item *di);
1319 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1320 struct btrfs_root *root, const char *name,
1321 u16 name_len, const void *data, u16 data_len,
1323 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1324 struct btrfs_root *root,
1325 struct btrfs_path *path, u64 dir,
1326 const char *name, u16 name_len,
1329 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1330 struct btrfs_root *fs_root,
1331 u64 dirid, u64 *objectid);
1332 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1335 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1336 struct btrfs_root *root,
1337 const char *name, int name_len,
1338 u64 inode_objectid, u64 ref_objectid);
1339 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1340 struct btrfs_root *root,
1341 const char *name, int name_len,
1342 u64 inode_objectid, u64 ref_objectid);
1343 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1344 struct btrfs_root *root,
1345 struct btrfs_path *path, u64 objectid);
1346 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1347 *root, u64 objectid, struct btrfs_inode_item
1349 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1350 *root, struct btrfs_path *path,
1351 struct btrfs_key *location, int mod);
1354 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1355 struct btrfs_root *root,
1356 u64 objectid, u64 pos, u64 offset,
1359 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1360 struct btrfs_root *root, u64 objectid,
1361 u64 offset, char *buffer, size_t size);
1362 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1363 struct btrfs_root *root,
1364 struct btrfs_path *path, u64 objectid,
1365 u64 bytenr, int mod);
1366 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1367 struct btrfs_root *root,
1368 struct btrfs_inode_item *inode,
1369 u64 objectid, u64 offset,
1370 char *data, size_t len);
1371 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1372 struct btrfs_root *root,
1373 struct btrfs_path *path,
1374 u64 objectid, u64 offset,
1376 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1377 struct btrfs_root *root, struct btrfs_path *path,