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)
405 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
407 struct btrfs_block_group_item {
410 __le64 chunk_objectid;
412 } __attribute__ ((__packed__));
414 struct btrfs_space_info {
420 struct list_head list;
423 struct btrfs_block_group_cache {
424 struct cache_extent cache;
425 struct btrfs_key key;
426 struct btrfs_block_group_item item;
427 struct btrfs_space_info *space_info;
433 struct btrfs_extent_ops {
434 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
435 u64 hint_byte, struct btrfs_key *ins);
436 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
441 struct btrfs_fs_devices;
442 struct btrfs_fs_info {
443 u8 fsid[BTRFS_FSID_SIZE];
444 struct btrfs_root *fs_root;
445 struct btrfs_root *extent_root;
446 struct btrfs_root *tree_root;
447 struct btrfs_root *chunk_root;
448 struct btrfs_root *dev_root;
450 struct extent_io_tree extent_cache;
451 struct extent_io_tree free_space_cache;
452 struct extent_io_tree block_group_cache;
453 struct extent_io_tree pinned_extents;
454 struct extent_io_tree pending_del;
455 struct extent_io_tree extent_ins;
457 /* logical->physical extent mapping */
458 struct btrfs_mapping_tree mapping_tree;
461 u64 last_trans_committed;
462 struct btrfs_trans_handle *running_transaction;
463 struct btrfs_super_block super_copy;
464 struct extent_buffer *sb_buffer;
465 struct mutex fs_mutex;
468 struct btrfs_extent_ops *extent_ops;
469 struct list_head dirty_cowonly_roots;
471 struct btrfs_fs_devices *fs_devices;
472 struct list_head space_info;
474 int force_system_allocs;
479 * in ram representation of the tree. extent_root is used for all allocations
480 * and for the extent tree extent_root root.
483 struct extent_buffer *node;
484 struct extent_buffer *commit_root;
485 struct btrfs_root_item root_item;
486 struct btrfs_key root_key;
487 struct btrfs_fs_info *fs_info;
491 /* data allocations are done in sectorsize units */
494 /* node allocations are done in nodesize units */
497 /* leaf allocations are done in leafsize units */
500 /* leaf allocations are done in leafsize units */
509 u64 last_inode_alloc;
511 /* the dirty list is only used by non-reference counted roots */
512 struct list_head dirty_list;
516 * inode items have the data typically returned from stat and store other
517 * info about object characteristics. There is one for every file and dir in
520 #define BTRFS_INODE_ITEM_KEY 1
521 #define BTRFS_INODE_REF_KEY 2
522 #define BTRFS_XATTR_ITEM_KEY 8
524 /* reserve 3-15 close to the inode for later flexibility */
527 * dir items are the name -> inode pointers in a directory. There is one
528 * for every name in a directory.
530 #define BTRFS_DIR_ITEM_KEY 16
531 #define BTRFS_DIR_INDEX_KEY 17
533 * extent data is for file data
535 #define BTRFS_EXTENT_DATA_KEY 18
537 * csum items have the checksums for data in the extents
539 #define BTRFS_CSUM_ITEM_KEY 19
541 /* reserve 20-31 for other file stuff */
544 * root items point to tree roots. There are typically in the root
545 * tree used by the super block to find all the other trees
547 #define BTRFS_ROOT_ITEM_KEY 32
549 * extent items are in the extent map tree. These record which blocks
550 * are used, and how many references there are to each block
552 #define BTRFS_EXTENT_ITEM_KEY 33
553 #define BTRFS_EXTENT_REF_KEY 34
556 * block groups give us hints into the extent allocation trees. Which
557 * blocks are free etc etc
559 #define BTRFS_BLOCK_GROUP_ITEM_KEY 50
561 #define BTRFS_DEV_EXTENT_KEY 75
562 #define BTRFS_DEV_ITEM_KEY 76
563 #define BTRFS_CHUNK_ITEM_KEY 77
566 * string items are for debugging. They just store a short string of
569 #define BTRFS_STRING_ITEM_KEY 253
573 #define BTRFS_INODE_NODATASUM (1 << 0)
574 #define BTRFS_INODE_NODATACOW (1 << 1)
575 #define BTRFS_INODE_READONLY (1 << 2)
577 #define read_eb_member(eb, ptr, type, member, result) ( \
578 read_extent_buffer(eb, (char *)(result), \
579 ((unsigned long)(ptr)) + \
580 offsetof(type, member), \
581 sizeof(((type *)0)->member)))
583 #define write_eb_member(eb, ptr, type, member, result) ( \
584 write_extent_buffer(eb, (char *)(result), \
585 ((unsigned long)(ptr)) + \
586 offsetof(type, member), \
587 sizeof(((type *)0)->member)))
589 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
590 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
592 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
593 return le##bits##_to_cpu(h->member); \
595 static inline void btrfs_set_##name(struct extent_buffer *eb, \
598 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
599 h->member = cpu_to_le##bits(val); \
602 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
603 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
606 unsigned long offset = (unsigned long)s; \
607 type *p = (type *) (eb->data + offset); \
608 return le##bits##_to_cpu(p->member); \
610 static inline void btrfs_set_##name(struct extent_buffer *eb, \
611 type *s, u##bits val) \
613 unsigned long offset = (unsigned long)s; \
614 type *p = (type *) (eb->data + offset); \
615 p->member = cpu_to_le##bits(val); \
618 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
619 static inline u##bits btrfs_##name(type *s) \
621 return le##bits##_to_cpu(s->member); \
623 static inline void btrfs_set_##name(type *s, u##bits val) \
625 s->member = cpu_to_le##bits(val); \
628 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
629 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
630 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
631 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
632 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
633 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
634 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
636 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
637 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
639 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
641 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
643 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
645 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
647 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
649 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
651 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
654 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
655 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
656 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
657 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
658 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
659 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
660 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
661 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
662 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
676 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
677 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
679 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
682 unsigned long offset = (unsigned long)c;
683 offset += offsetof(struct btrfs_chunk, stripe);
684 offset += nr * sizeof(struct btrfs_stripe);
685 return (struct btrfs_stripe *)offset;
688 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
689 struct btrfs_chunk *c, int nr)
691 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
694 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
695 struct btrfs_chunk *c, int nr,
698 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
701 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
702 struct btrfs_chunk *c, int nr)
704 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
707 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
708 struct btrfs_chunk *c, int nr,
711 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
714 /* struct btrfs_block_group_item */
715 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
717 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
719 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item,
721 BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item,
723 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
724 struct btrfs_block_group_item, chunk_objectid, 64);
725 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd,
726 struct btrfs_block_group_item, chunk_objectid, 64);
727 BTRFS_SETGET_FUNCS(disk_block_group_flags,
728 struct btrfs_block_group_item, flags, 64);
729 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
730 struct btrfs_block_group_item, flags, 64);
732 /* struct btrfs_inode_ref */
733 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
735 /* struct btrfs_inode_item */
736 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
737 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
738 BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64);
739 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
740 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
741 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
742 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
743 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
744 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
745 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16);
746 BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item,
749 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
750 struct btrfs_inode_item, generation, 64);
751 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
752 struct btrfs_inode_item, size, 64);
753 BTRFS_SETGET_STACK_FUNCS(stack_inode_nblocks,
754 struct btrfs_inode_item, nblocks, 64);
755 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
756 struct btrfs_inode_item, block_group, 64);
757 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
758 struct btrfs_inode_item, nlink, 32);
759 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
760 struct btrfs_inode_item, uid, 32);
761 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
762 struct btrfs_inode_item, gid, 32);
763 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
764 struct btrfs_inode_item, mode, 32);
765 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
766 struct btrfs_inode_item, rdev, 64);
767 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
768 struct btrfs_inode_item, flags, 16);
769 BTRFS_SETGET_STACK_FUNCS(stack_inode_compat_flags,
770 struct btrfs_inode_item, compat_flags, 16);
772 static inline struct btrfs_timespec *
773 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
775 unsigned long ptr = (unsigned long)inode_item;
776 ptr += offsetof(struct btrfs_inode_item, atime);
777 return (struct btrfs_timespec *)ptr;
780 static inline struct btrfs_timespec *
781 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
783 unsigned long ptr = (unsigned long)inode_item;
784 ptr += offsetof(struct btrfs_inode_item, mtime);
785 return (struct btrfs_timespec *)ptr;
788 static inline struct btrfs_timespec *
789 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
791 unsigned long ptr = (unsigned long)inode_item;
792 ptr += offsetof(struct btrfs_inode_item, ctime);
793 return (struct btrfs_timespec *)ptr;
796 static inline struct btrfs_timespec *
797 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
799 unsigned long ptr = (unsigned long)inode_item;
800 ptr += offsetof(struct btrfs_inode_item, otime);
801 return (struct btrfs_timespec *)ptr;
804 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
805 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
806 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
808 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
811 /* struct btrfs_dev_extent */
812 BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64);
813 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
815 /* struct btrfs_extent_item */
816 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32);
818 /* struct btrfs_extent_ref */
819 BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64);
820 BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64);
821 BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64);
822 BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64);
824 BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64);
825 BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref,
827 BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref,
829 BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64);
831 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item,
834 /* struct btrfs_node */
835 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
836 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
838 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
841 ptr = offsetof(struct btrfs_node, ptrs) +
842 sizeof(struct btrfs_key_ptr) * nr;
843 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
846 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
850 ptr = offsetof(struct btrfs_node, ptrs) +
851 sizeof(struct btrfs_key_ptr) * nr;
852 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
855 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
858 ptr = offsetof(struct btrfs_node, ptrs) +
859 sizeof(struct btrfs_key_ptr) * nr;
860 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
863 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
867 ptr = offsetof(struct btrfs_node, ptrs) +
868 sizeof(struct btrfs_key_ptr) * nr;
869 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
872 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
874 return offsetof(struct btrfs_node, ptrs) +
875 sizeof(struct btrfs_key_ptr) * nr;
878 static inline void btrfs_node_key(struct extent_buffer *eb,
879 struct btrfs_disk_key *disk_key, int nr)
882 ptr = btrfs_node_key_ptr_offset(nr);
883 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
884 struct btrfs_key_ptr, key, disk_key);
887 static inline void btrfs_set_node_key(struct extent_buffer *eb,
888 struct btrfs_disk_key *disk_key, int nr)
891 ptr = btrfs_node_key_ptr_offset(nr);
892 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
893 struct btrfs_key_ptr, key, disk_key);
896 /* struct btrfs_item */
897 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
898 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
900 static inline unsigned long btrfs_item_nr_offset(int nr)
902 return offsetof(struct btrfs_leaf, items) +
903 sizeof(struct btrfs_item) * nr;
906 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
909 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
912 static inline u32 btrfs_item_end(struct extent_buffer *eb,
913 struct btrfs_item *item)
915 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
918 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
920 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
923 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
925 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
928 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
930 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
933 static inline void btrfs_item_key(struct extent_buffer *eb,
934 struct btrfs_disk_key *disk_key, int nr)
936 struct btrfs_item *item = btrfs_item_nr(eb, nr);
937 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
940 static inline void btrfs_set_item_key(struct extent_buffer *eb,
941 struct btrfs_disk_key *disk_key, int nr)
943 struct btrfs_item *item = btrfs_item_nr(eb, nr);
944 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
947 /* struct btrfs_dir_item */
948 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
949 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
950 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
952 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
953 struct btrfs_dir_item *item,
954 struct btrfs_disk_key *key)
956 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
959 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
960 struct btrfs_dir_item *item,
961 struct btrfs_disk_key *key)
963 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
966 /* struct btrfs_disk_key */
967 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
969 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
970 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
972 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
973 struct btrfs_disk_key *disk)
975 cpu->offset = le64_to_cpu(disk->offset);
976 cpu->type = disk->type;
977 cpu->objectid = le64_to_cpu(disk->objectid);
980 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
981 struct btrfs_key *cpu)
983 disk->offset = cpu_to_le64(cpu->offset);
984 disk->type = cpu->type;
985 disk->objectid = cpu_to_le64(cpu->objectid);
988 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
989 struct btrfs_key *key, int nr)
991 struct btrfs_disk_key disk_key;
992 btrfs_node_key(eb, &disk_key, nr);
993 btrfs_disk_key_to_cpu(key, &disk_key);
996 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
997 struct btrfs_key *key, int nr)
999 struct btrfs_disk_key disk_key;
1000 btrfs_item_key(eb, &disk_key, nr);
1001 btrfs_disk_key_to_cpu(key, &disk_key);
1004 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1005 struct btrfs_dir_item *item,
1006 struct btrfs_key *key)
1008 struct btrfs_disk_key disk_key;
1009 btrfs_dir_item_key(eb, item, &disk_key);
1010 btrfs_disk_key_to_cpu(key, &disk_key);
1014 static inline u8 btrfs_key_type(struct btrfs_key *key)
1019 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1024 /* struct btrfs_header */
1025 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1026 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1028 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1029 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1030 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16);
1031 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1033 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1035 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1039 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1041 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1045 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1047 unsigned long ptr = offsetof(struct btrfs_header, csum);
1051 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1056 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1061 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1066 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1068 return (btrfs_header_level(eb) == 0);
1071 /* struct btrfs_root_item */
1072 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1073 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1074 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1076 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1077 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1078 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1079 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1080 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32);
1081 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1082 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1084 /* struct btrfs_super_block */
1085 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1086 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1088 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1089 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1090 struct btrfs_super_block, sys_chunk_array_size, 32);
1091 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1093 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1095 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1096 chunk_root_level, 64);
1097 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1099 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1101 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1103 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1105 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1107 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1109 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1110 root_dir_objectid, 64);
1111 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1114 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1116 return offsetof(struct btrfs_leaf, items);
1119 /* struct btrfs_file_extent_item */
1120 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1122 static inline unsigned long btrfs_file_extent_inline_start(struct
1123 btrfs_file_extent_item *e)
1125 unsigned long offset = (unsigned long)e;
1126 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1130 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1132 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1135 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1136 struct btrfs_item *e)
1138 unsigned long offset;
1139 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1140 return btrfs_item_size(eb, e) - offset;
1143 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1145 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1147 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1148 disk_num_bytes, 64);
1149 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1151 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1154 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1156 return root->leafsize;
1157 return root->nodesize;
1160 /* helper function to cast into the data area of the leaf. */
1161 #define btrfs_item_ptr(leaf, slot, type) \
1162 ((type *)(btrfs_leaf_data(leaf) + \
1163 btrfs_item_offset_nr(leaf, slot)))
1165 #define btrfs_item_ptr_offset(leaf, slot) \
1166 ((unsigned long)(btrfs_leaf_data(leaf) + \
1167 btrfs_item_offset_nr(leaf, slot)))
1170 u32 btrfs_count_snapshots_in_path(struct btrfs_root *root,
1171 struct btrfs_path *count_path,
1173 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1174 struct btrfs_root *root);
1175 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1176 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1177 btrfs_fs_info *info,
1179 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1180 struct btrfs_block_group_cache
1181 *hint, u64 search_start,
1182 int data, int owner);
1183 int btrfs_inc_root_ref(struct btrfs_trans_handle *trans,
1184 struct btrfs_root *root, u64 owner_objectid);
1185 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1186 struct btrfs_root *root, u32 size,
1188 u64 hint, u64 empty_size);
1189 struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1190 struct btrfs_root *root,
1198 int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans,
1199 struct btrfs_root *root, u64 new_size);
1200 int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size);
1201 int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
1202 struct btrfs_root *root,
1203 struct btrfs_path *path, u64 bytenr,
1204 u64 root_objectid, u64 ref_generation,
1205 u64 owner, u64 owner_offset);
1206 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1207 struct btrfs_root *root,
1208 u64 num_bytes, u64 root_objectid, u64 ref_generation,
1209 u64 owner, u64 owner_offset,
1210 u64 empty_size, u64 hint_byte,
1211 u64 search_end, struct btrfs_key *ins, int data);
1212 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1213 struct extent_buffer *buf);
1214 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
1215 *root, u64 bytenr, u64 num_bytes,
1216 u64 root_objectid, u64 ref_generation,
1217 u64 owner_objectid, u64 owner_offset, int pin);
1218 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1219 struct btrfs_root *root,
1220 struct extent_io_tree *unpin);
1221 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1222 struct btrfs_root *root,
1223 u64 bytenr, u64 num_bytes,
1224 u64 root_objectid, u64 ref_generation,
1225 u64 owner, u64 owner_offset);
1226 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1227 struct btrfs_root *root);
1228 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1229 int btrfs_read_block_groups(struct btrfs_root *root);
1230 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1231 struct btrfs_root *root, u64 bytes_used,
1232 u64 type, u64 chunk_tree, u64 chunk_objectid,
1234 u64 btrfs_hash_extent_ref(u64 root_objectid, u64 ref_generation,
1235 u64 owner, u64 owner_offset);
1236 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1237 struct btrfs_root *root, u64 bytenr, u64 num,
1238 int alloc, int mark_free);
1240 int btrfs_previous_item(struct btrfs_root *root,
1241 struct btrfs_path *path, u64 min_objectid,
1243 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1244 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1245 struct btrfs_root *root, struct extent_buffer *buf,
1246 struct extent_buffer *parent, int parent_slot,
1247 struct extent_buffer **cow_ret);
1248 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1249 struct btrfs_root *root,
1250 struct extent_buffer *buf,
1251 struct extent_buffer **cow_ret, u64 new_root_objectid);
1252 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1253 *root, struct btrfs_path *path, u32 data_size);
1254 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1255 struct btrfs_root *root,
1256 struct btrfs_path *path,
1257 u32 new_size, int from_end);
1258 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1259 *root, struct btrfs_key *key, struct btrfs_path *p, int
1261 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1262 struct btrfs_root *root, struct extent_buffer *parent,
1263 int start_slot, int cache_only, u64 *last_ret,
1264 struct btrfs_key *progress);
1265 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1266 struct btrfs_path *btrfs_alloc_path(void);
1267 void btrfs_free_path(struct btrfs_path *p);
1268 void btrfs_init_path(struct btrfs_path *p);
1269 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1270 struct btrfs_path *path, int slot, int nr);
1272 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1273 struct btrfs_root *root,
1274 struct btrfs_path *path)
1276 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1279 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1280 *root, struct btrfs_key *key, void *data, u32 data_size);
1281 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1282 struct btrfs_root *root,
1283 struct btrfs_path *path,
1284 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1286 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1287 struct btrfs_root *root,
1288 struct btrfs_path *path,
1289 struct btrfs_key *key,
1292 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1295 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1296 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1297 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1298 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1303 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1304 struct btrfs_key *key);
1305 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1306 *root, struct btrfs_key *key, struct btrfs_root_item
1308 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1309 *root, struct btrfs_key *key, struct btrfs_root_item
1311 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1312 btrfs_root_item *item, struct btrfs_key *key);
1313 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1314 struct btrfs_root *latest_root);
1316 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1317 *root, const char *name, int name_len, u64 dir,
1318 struct btrfs_key *location, u8 type);
1319 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1320 struct btrfs_root *root,
1321 struct btrfs_path *path, u64 dir,
1322 const char *name, int name_len,
1324 struct btrfs_dir_item *
1325 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1326 struct btrfs_root *root,
1327 struct btrfs_path *path, u64 dir,
1328 u64 objectid, const char *name, int name_len,
1330 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1331 struct btrfs_path *path,
1332 const char *name, int name_len);
1333 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1334 struct btrfs_root *root,
1335 struct btrfs_path *path,
1336 struct btrfs_dir_item *di);
1337 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1338 struct btrfs_root *root, const char *name,
1339 u16 name_len, const void *data, u16 data_len,
1341 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1342 struct btrfs_root *root,
1343 struct btrfs_path *path, u64 dir,
1344 const char *name, u16 name_len,
1347 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1348 struct btrfs_root *fs_root,
1349 u64 dirid, u64 *objectid);
1350 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1353 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1354 struct btrfs_root *root,
1355 const char *name, int name_len,
1356 u64 inode_objectid, u64 ref_objectid);
1357 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1358 struct btrfs_root *root,
1359 const char *name, int name_len,
1360 u64 inode_objectid, u64 ref_objectid);
1361 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1362 struct btrfs_root *root,
1363 struct btrfs_path *path, u64 objectid);
1364 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1365 *root, u64 objectid, struct btrfs_inode_item
1367 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1368 *root, struct btrfs_path *path,
1369 struct btrfs_key *location, int mod);
1372 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1373 struct btrfs_root *root,
1374 u64 objectid, u64 pos, u64 offset,
1377 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
1378 struct btrfs_root *root, u64 objectid,
1379 u64 offset, char *buffer, size_t size);
1380 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
1381 struct btrfs_root *root,
1382 struct btrfs_path *path, u64 objectid,
1383 u64 bytenr, int mod);
1384 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
1385 struct btrfs_root *root,
1386 struct btrfs_inode_item *inode,
1387 u64 objectid, u64 offset,
1388 char *data, size_t len);
1389 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
1390 struct btrfs_root *root,
1391 struct btrfs_path *path,
1392 u64 objectid, u64 offset,
1394 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
1395 struct btrfs_root *root, struct btrfs_path *path,