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"
30 struct btrfs_trans_handle;
31 #define BTRFS_MAGIC "_BHRfS_M"
33 #define BTRFS_MAX_LEVEL 8
35 #define BTRFS_COMPAT_EXTENT_TREE_V0
37 /* holds pointers to all of the tree roots */
38 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
40 /* stores information about which extents are in use, and reference counts */
41 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
44 * chunk tree stores translations from logical -> physical block numbering
45 * the super block points to the chunk tree
47 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
50 * stores information about which areas of a given device are in use.
51 * one per device. The tree of tree roots points to the device tree
53 #define BTRFS_DEV_TREE_OBJECTID 4ULL
55 /* one per subvolume, storing files and directories */
56 #define BTRFS_FS_TREE_OBJECTID 5ULL
58 /* directory objectid inside the root tree */
59 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
60 /* holds checksums of all the data extents */
61 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
64 /* oprhan objectid for tracking unlinked/truncated files */
65 #define BTRFS_ORPHAN_OBJECTID -5ULL
67 /* does write ahead logging to speed up fsyncs */
68 #define BTRFS_TREE_LOG_OBJECTID -6ULL
69 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
72 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
73 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
76 * extent checksums all have this objectid
77 * this allows them to share the logging tree
80 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
82 /* For storing free space cache */
83 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
86 * The inode number assigned to the special inode for sotring
89 #define BTRFS_FREE_INO_OBJECTID -12ULL
91 /* dummy objectid represents multiple objectids */
92 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
95 * All files have objectids in this range.
97 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
98 #define BTRFS_LAST_FREE_OBJECTID -256ULL
99 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
104 * the device items go into the chunk tree. The key is in the form
105 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
107 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
110 * we can actually store much bigger names, but lets not confuse the rest
113 #define BTRFS_NAME_LEN 255
115 /* 32 bytes in various csum fields */
116 #define BTRFS_CSUM_SIZE 32
119 #define BTRFS_CSUM_TYPE_CRC32 0
123 #define BTRFS_CSUM_TYPE_CRC32 0
125 static int btrfs_csum_sizes[] = { 4, 0 };
127 /* four bytes for CRC32 */
128 #define BTRFS_CRC32_SIZE 4
129 #define BTRFS_EMPTY_DIR_SIZE 0
131 #define BTRFS_FT_UNKNOWN 0
132 #define BTRFS_FT_REG_FILE 1
133 #define BTRFS_FT_DIR 2
134 #define BTRFS_FT_CHRDEV 3
135 #define BTRFS_FT_BLKDEV 4
136 #define BTRFS_FT_FIFO 5
137 #define BTRFS_FT_SOCK 6
138 #define BTRFS_FT_SYMLINK 7
139 #define BTRFS_FT_XATTR 8
140 #define BTRFS_FT_MAX 9
143 * the key defines the order in the tree, and so it also defines (optimal)
144 * block layout. objectid corresonds to the inode number. The flags
145 * tells us things about the object, and is a kind of stream selector.
146 * so for a given inode, keys with flags of 1 might refer to the inode
147 * data, flags of 2 may point to file data in the btree and flags == 3
148 * may point to extents.
150 * offset is the starting byte offset for this key in the stream.
152 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
153 * in cpu native order. Otherwise they are identical and their sizes
154 * should be the same (ie both packed)
156 struct btrfs_disk_key {
160 } __attribute__ ((__packed__));
166 } __attribute__ ((__packed__));
168 struct btrfs_mapping_tree {
169 struct cache_tree cache_tree;
172 #define BTRFS_UUID_SIZE 16
173 struct btrfs_dev_item {
174 /* the internal btrfs device id */
177 /* size of the device */
183 /* optimal io alignment for this device */
186 /* optimal io width for this device */
189 /* minimal io size for this device */
192 /* type and info about this device */
195 /* expected generation for this device */
199 * starting byte of this partition on the device,
200 * to allowr for stripe alignment in the future
204 /* grouping information for allocation decisions */
207 /* seek speed 0-100 where 100 is fastest */
210 /* bandwidth 0-100 where 100 is fastest */
213 /* btrfs generated uuid for this device */
214 u8 uuid[BTRFS_UUID_SIZE];
216 /* uuid of FS who owns this device */
217 u8 fsid[BTRFS_UUID_SIZE];
218 } __attribute__ ((__packed__));
220 struct btrfs_stripe {
223 u8 dev_uuid[BTRFS_UUID_SIZE];
224 } __attribute__ ((__packed__));
227 /* size of this chunk in bytes */
230 /* objectid of the root referencing this chunk */
236 /* optimal io alignment for this chunk */
239 /* optimal io width for this chunk */
242 /* minimal io size for this chunk */
245 /* 2^16 stripes is quite a lot, a second limit is the size of a single
250 /* sub stripes only matter for raid10 */
252 struct btrfs_stripe stripe;
253 /* additional stripes go here */
254 } __attribute__ ((__packed__));
256 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
258 BUG_ON(num_stripes == 0);
259 return sizeof(struct btrfs_chunk) +
260 sizeof(struct btrfs_stripe) * (num_stripes - 1);
263 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
264 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
265 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
266 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
268 #define BTRFS_BACKREF_REV_MAX 256
269 #define BTRFS_BACKREF_REV_SHIFT 56
270 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
271 BTRFS_BACKREF_REV_SHIFT)
273 #define BTRFS_OLD_BACKREF_REV 0
274 #define BTRFS_MIXED_BACKREF_REV 1
277 * every tree block (leaf or node) starts with this header.
279 struct btrfs_header {
280 /* these first four must match the super block */
281 u8 csum[BTRFS_CSUM_SIZE];
282 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
283 __le64 bytenr; /* which block this node is supposed to live in */
286 /* allowed to be different from the super from here on down */
287 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
292 } __attribute__ ((__packed__));
294 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
295 sizeof(struct btrfs_header)) / \
296 sizeof(struct btrfs_key_ptr))
297 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
298 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
299 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
300 sizeof(struct btrfs_item) - \
301 sizeof(struct btrfs_file_extent_item))
302 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
303 sizeof(struct btrfs_item) -\
304 sizeof(struct btrfs_dir_item))
308 * this is a very generous portion of the super block, giving us
309 * room to translate 14 chunks with 3 stripes each.
311 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
312 #define BTRFS_LABEL_SIZE 256
315 * just in case we somehow lose the roots and are not able to mount,
316 * we store an array of the roots from previous transactions
319 #define BTRFS_NUM_BACKUP_ROOTS 4
320 struct btrfs_root_backup {
322 __le64 tree_root_gen;
325 __le64 chunk_root_gen;
328 __le64 extent_root_gen;
337 __le64 csum_root_gen;
347 u8 extent_root_level;
351 /* future and to align */
353 } __attribute__ ((__packed__));
356 * the super block basically lists the main trees of the FS
357 * it currently lacks any block count etc etc
359 struct btrfs_super_block {
360 u8 csum[BTRFS_CSUM_SIZE];
361 /* the first 3 fields must match struct btrfs_header */
362 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
363 __le64 bytenr; /* this block number */
366 /* allowed to be different from the btrfs_header from here own down */
373 /* this will help find the new super based on the log root */
374 __le64 log_root_transid;
377 __le64 root_dir_objectid;
383 __le32 sys_chunk_array_size;
384 __le64 chunk_root_generation;
386 __le64 compat_ro_flags;
387 __le64 incompat_flags;
392 struct btrfs_dev_item dev_item;
394 char label[BTRFS_LABEL_SIZE];
396 __le64 cache_generation;
398 /* future expansion */
400 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
401 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
402 } __attribute__ ((__packed__));
405 * Compat flags that we support. If any incompat flags are set other than the
406 * ones specified below then we will fail to mount
408 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
409 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
410 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
411 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
413 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
414 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
415 #define BTRFS_FEATURE_INCOMPAT_SUPP \
416 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
417 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
418 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
419 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
422 * A leaf is full of items. offset and size tell us where to find
423 * the item in the leaf (relative to the start of the data area)
426 struct btrfs_disk_key key;
429 } __attribute__ ((__packed__));
432 * leaves have an item area and a data area:
433 * [item0, item1....itemN] [free space] [dataN...data1, data0]
435 * The data is separate from the items to get the keys closer together
439 struct btrfs_header header;
440 struct btrfs_item items[];
441 } __attribute__ ((__packed__));
444 * all non-leaf blocks are nodes, they hold only keys and pointers to
447 struct btrfs_key_ptr {
448 struct btrfs_disk_key key;
451 } __attribute__ ((__packed__));
454 struct btrfs_header header;
455 struct btrfs_key_ptr ptrs[];
456 } __attribute__ ((__packed__));
459 * btrfs_paths remember the path taken from the root down to the leaf.
460 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
461 * to any other levels that are present.
463 * The slots array records the index of the item or block pointer
464 * used while walking the tree.
468 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
469 int slots[BTRFS_MAX_LEVEL];
470 /* if there is real range locking, this locks field will change */
471 int locks[BTRFS_MAX_LEVEL];
473 /* keep some upper locks as we walk down */
477 * set by btrfs_split_item, tells search_slot to keep all locks
478 * and to force calls to keep space in the nodes
480 unsigned int search_for_split:1;
481 unsigned int keep_locks:1;
482 unsigned int skip_locking:1;
483 unsigned int leave_spinning:1;
487 * items in the extent btree are used to record the objectid of the
488 * owner of the block and the number of references
491 struct btrfs_extent_item {
495 } __attribute__ ((__packed__));
497 struct btrfs_extent_item_v0 {
499 } __attribute__ ((__packed__));
501 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
502 sizeof(struct btrfs_item))
504 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
505 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
507 /* following flags only apply to tree blocks */
509 /* use full backrefs for extent pointers in the block*/
510 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
512 struct btrfs_tree_block_info {
513 struct btrfs_disk_key key;
515 } __attribute__ ((__packed__));
517 struct btrfs_extent_data_ref {
522 } __attribute__ ((__packed__));
524 struct btrfs_shared_data_ref {
526 } __attribute__ ((__packed__));
528 struct btrfs_extent_inline_ref {
531 } __attribute__ ((__packed__));
533 struct btrfs_extent_ref_v0 {
538 } __attribute__ ((__packed__));
540 /* dev extents record free space on individual devices. The owner
541 * field points back to the chunk allocation mapping tree that allocated
542 * the extent. The chunk tree uuid field is a way to double check the owner
544 struct btrfs_dev_extent {
546 __le64 chunk_objectid;
549 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
550 } __attribute__ ((__packed__));
552 struct btrfs_inode_ref {
556 } __attribute__ ((__packed__));
558 struct btrfs_timespec {
561 } __attribute__ ((__packed__));
564 BTRFS_COMPRESS_NONE = 0,
565 BTRFS_COMPRESS_ZLIB = 1,
566 BTRFS_COMPRESS_LZO = 2,
567 BTRFS_COMPRESS_TYPES = 2,
568 BTRFS_COMPRESS_LAST = 3,
569 } btrfs_compression_type;
571 /* we don't understand any encryption methods right now */
573 BTRFS_ENCRYPTION_NONE = 0,
574 BTRFS_ENCRYPTION_LAST = 1,
575 } btrfs_encryption_type;
577 struct btrfs_inode_item {
578 /* nfs style generation number */
580 /* transid that last touched this inode */
592 /* modification sequence number for NFS */
596 * a little future expansion, for more than this we can
597 * just grow the inode item and version it
600 struct btrfs_timespec atime;
601 struct btrfs_timespec ctime;
602 struct btrfs_timespec mtime;
603 struct btrfs_timespec otime;
604 } __attribute__ ((__packed__));
606 struct btrfs_dir_log_item {
608 } __attribute__ ((__packed__));
610 struct btrfs_dir_item {
611 struct btrfs_disk_key location;
616 } __attribute__ ((__packed__));
618 struct btrfs_root_item {
619 struct btrfs_inode_item inode;
625 __le64 last_snapshot;
628 struct btrfs_disk_key drop_progress;
631 } __attribute__ ((__packed__));
634 * this is used for both forward and backward root refs
636 struct btrfs_root_ref {
640 } __attribute__ ((__packed__));
642 #define BTRFS_FILE_EXTENT_INLINE 0
643 #define BTRFS_FILE_EXTENT_REG 1
644 #define BTRFS_FILE_EXTENT_PREALLOC 2
646 struct btrfs_file_extent_item {
648 * transaction id that created this extent
652 * max number of bytes to hold this extent in ram
653 * when we split a compressed extent we can't know how big
654 * each of the resulting pieces will be. So, this is
655 * an upper limit on the size of the extent in ram instead of
661 * 32 bits for the various ways we might encode the data,
662 * including compression and encryption. If any of these
663 * are set to something a given disk format doesn't understand
664 * it is treated like an incompat flag for reading and writing,
669 __le16 other_encoding; /* spare for later use */
671 /* are we inline data or a real extent? */
675 * disk space consumed by the extent, checksum blocks are included
679 __le64 disk_num_bytes;
681 * the logical offset in file blocks (no csums)
682 * this extent record is for. This allows a file extent to point
683 * into the middle of an existing extent on disk, sharing it
684 * between two snapshots (useful if some bytes in the middle of the
685 * extent have changed
689 * the logical number of file blocks (no csums included)
693 } __attribute__ ((__packed__));
695 struct btrfs_csum_item {
697 } __attribute__ ((__packed__));
699 /* tag for the radix tree of block groups in ram */
700 #define BTRFS_BLOCK_GROUP_DATA (1 << 0)
701 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
702 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
703 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
704 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
705 #define BTRFS_BLOCK_GROUP_DUP (1 << 5)
706 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6)
708 struct btrfs_block_group_item {
710 __le64 chunk_objectid;
712 } __attribute__ ((__packed__));
714 struct btrfs_space_info {
720 struct list_head list;
723 struct btrfs_block_group_cache {
724 struct cache_extent cache;
725 struct btrfs_key key;
726 struct btrfs_block_group_item item;
727 struct btrfs_space_info *space_info;
734 struct btrfs_extent_ops {
735 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
736 u64 hint_byte, struct btrfs_key *ins);
737 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
742 struct btrfs_fs_devices;
743 struct btrfs_fs_info {
744 u8 fsid[BTRFS_FSID_SIZE];
745 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
746 struct btrfs_root *fs_root;
747 struct btrfs_root *extent_root;
748 struct btrfs_root *tree_root;
749 struct btrfs_root *chunk_root;
750 struct btrfs_root *dev_root;
751 struct btrfs_root *csum_root;
753 struct cache_tree fs_root_cache;
755 /* the log root tree is a directory of all the other log roots */
756 struct btrfs_root *log_root_tree;
758 struct extent_io_tree extent_cache;
759 struct extent_io_tree free_space_cache;
760 struct extent_io_tree block_group_cache;
761 struct extent_io_tree pinned_extents;
762 struct extent_io_tree pending_del;
763 struct extent_io_tree extent_ins;
765 /* logical->physical extent mapping */
766 struct btrfs_mapping_tree mapping_tree;
769 u64 last_trans_committed;
771 u64 avail_data_alloc_bits;
772 u64 avail_metadata_alloc_bits;
773 u64 avail_system_alloc_bits;
774 u64 data_alloc_profile;
775 u64 metadata_alloc_profile;
776 u64 system_alloc_profile;
779 struct btrfs_trans_handle *running_transaction;
780 struct btrfs_super_block super_copy;
781 struct mutex fs_mutex;
786 struct btrfs_extent_ops *extent_ops;
787 struct list_head dirty_cowonly_roots;
789 struct btrfs_fs_devices *fs_devices;
790 struct list_head space_info;
796 * in ram representation of the tree. extent_root is used for all allocations
797 * and for the extent tree extent_root root.
800 struct extent_buffer *node;
801 struct extent_buffer *commit_root;
802 struct btrfs_root_item root_item;
803 struct btrfs_key root_key;
804 struct btrfs_fs_info *fs_info;
808 /* data allocations are done in sectorsize units */
811 /* node allocations are done in nodesize units */
814 /* leaf allocations are done in leafsize units */
817 /* leaf allocations are done in leafsize units */
826 u64 last_inode_alloc;
828 /* the dirty list is only used by non-reference counted roots */
829 struct list_head dirty_list;
830 struct cache_extent cache;
834 * inode items have the data typically returned from stat and store other
835 * info about object characteristics. There is one for every file and dir in
838 #define BTRFS_INODE_ITEM_KEY 1
839 #define BTRFS_INODE_REF_KEY 12
840 #define BTRFS_XATTR_ITEM_KEY 24
841 #define BTRFS_ORPHAN_ITEM_KEY 48
843 #define BTRFS_DIR_LOG_ITEM_KEY 60
844 #define BTRFS_DIR_LOG_INDEX_KEY 72
846 * dir items are the name -> inode pointers in a directory. There is one
847 * for every name in a directory.
849 #define BTRFS_DIR_ITEM_KEY 84
850 #define BTRFS_DIR_INDEX_KEY 96
853 * extent data is for file data
855 #define BTRFS_EXTENT_DATA_KEY 108
858 * csum items have the checksums for data in the extents
860 #define BTRFS_CSUM_ITEM_KEY 120
862 * extent csums are stored in a separate tree and hold csums for
863 * an entire extent on disk.
865 #define BTRFS_EXTENT_CSUM_KEY 128
868 * root items point to tree roots. There are typically in the root
869 * tree used by the super block to find all the other trees
871 #define BTRFS_ROOT_ITEM_KEY 132
874 * root backrefs tie subvols and snapshots to the directory entries that
877 #define BTRFS_ROOT_BACKREF_KEY 144
880 * root refs make a fast index for listing all of the snapshots and
881 * subvolumes referenced by a given root. They point directly to the
882 * directory item in the root that references the subvol
884 #define BTRFS_ROOT_REF_KEY 156
887 * extent items are in the extent map tree. These record which blocks
888 * are used, and how many references there are to each block
890 #define BTRFS_EXTENT_ITEM_KEY 168
892 #define BTRFS_TREE_BLOCK_REF_KEY 176
894 #define BTRFS_EXTENT_DATA_REF_KEY 178
896 /* old style extent backrefs */
897 #define BTRFS_EXTENT_REF_V0_KEY 180
899 #define BTRFS_SHARED_BLOCK_REF_KEY 182
901 #define BTRFS_SHARED_DATA_REF_KEY 184
905 * block groups give us hints into the extent allocation trees. Which
906 * blocks are free etc etc
908 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
910 #define BTRFS_DEV_EXTENT_KEY 204
911 #define BTRFS_DEV_ITEM_KEY 216
912 #define BTRFS_CHUNK_ITEM_KEY 228
915 * string items are for debugging. They just store a short string of
918 #define BTRFS_STRING_ITEM_KEY 253
922 #define BTRFS_INODE_NODATASUM (1 << 0)
923 #define BTRFS_INODE_NODATACOW (1 << 1)
924 #define BTRFS_INODE_READONLY (1 << 2)
926 #define read_eb_member(eb, ptr, type, member, result) ( \
927 read_extent_buffer(eb, (char *)(result), \
928 ((unsigned long)(ptr)) + \
929 offsetof(type, member), \
930 sizeof(((type *)0)->member)))
932 #define write_eb_member(eb, ptr, type, member, result) ( \
933 write_extent_buffer(eb, (char *)(result), \
934 ((unsigned long)(ptr)) + \
935 offsetof(type, member), \
936 sizeof(((type *)0)->member)))
938 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
939 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
941 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
942 return le##bits##_to_cpu(h->member); \
944 static inline void btrfs_set_##name(struct extent_buffer *eb, \
947 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
948 h->member = cpu_to_le##bits(val); \
951 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
952 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
955 unsigned long offset = (unsigned long)s; \
956 type *p = (type *) (eb->data + offset); \
957 return le##bits##_to_cpu(p->member); \
959 static inline void btrfs_set_##name(struct extent_buffer *eb, \
960 type *s, u##bits val) \
962 unsigned long offset = (unsigned long)s; \
963 type *p = (type *) (eb->data + offset); \
964 p->member = cpu_to_le##bits(val); \
967 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
968 static inline u##bits btrfs_##name(type *s) \
970 return le##bits##_to_cpu(s->member); \
972 static inline void btrfs_set_##name(type *s, u##bits val) \
974 s->member = cpu_to_le##bits(val); \
977 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
978 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
979 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
980 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
981 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
982 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
984 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
985 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
986 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
987 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
988 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
989 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
991 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
992 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
994 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
996 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
998 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1000 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1002 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1003 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1005 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1007 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1009 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1012 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1014 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1017 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1019 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1022 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1023 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1024 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1025 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1026 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1027 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1028 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1029 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1030 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1031 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1032 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1034 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1036 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1039 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1040 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1041 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1043 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1045 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1047 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1049 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1050 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1052 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1054 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1055 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1057 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1060 unsigned long offset = (unsigned long)c;
1061 offset += offsetof(struct btrfs_chunk, stripe);
1062 offset += nr * sizeof(struct btrfs_stripe);
1063 return (struct btrfs_stripe *)offset;
1066 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1068 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1071 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1072 struct btrfs_chunk *c, int nr)
1074 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1077 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1078 struct btrfs_chunk *c, int nr,
1081 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1084 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1085 struct btrfs_chunk *c, int nr)
1087 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1090 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1091 struct btrfs_chunk *c, int nr,
1094 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1097 /* struct btrfs_block_group_item */
1098 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1100 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1102 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1103 struct btrfs_block_group_item, chunk_objectid, 64);
1105 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1106 struct btrfs_block_group_item, chunk_objectid, 64);
1107 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1108 struct btrfs_block_group_item, flags, 64);
1109 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1110 struct btrfs_block_group_item, flags, 64);
1112 /* struct btrfs_inode_ref */
1113 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1114 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1115 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1117 /* struct btrfs_inode_item */
1118 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1119 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1120 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1121 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1122 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1123 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1124 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1125 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1126 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1127 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1128 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1129 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1131 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1132 struct btrfs_inode_item, generation, 64);
1133 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1134 struct btrfs_inode_item, generation, 64);
1135 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1136 struct btrfs_inode_item, size, 64);
1137 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1138 struct btrfs_inode_item, nbytes, 64);
1139 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1140 struct btrfs_inode_item, block_group, 64);
1141 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1142 struct btrfs_inode_item, nlink, 32);
1143 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1144 struct btrfs_inode_item, uid, 32);
1145 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1146 struct btrfs_inode_item, gid, 32);
1147 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1148 struct btrfs_inode_item, mode, 32);
1149 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1150 struct btrfs_inode_item, rdev, 64);
1151 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1152 struct btrfs_inode_item, flags, 64);
1154 static inline struct btrfs_timespec *
1155 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1157 unsigned long ptr = (unsigned long)inode_item;
1158 ptr += offsetof(struct btrfs_inode_item, atime);
1159 return (struct btrfs_timespec *)ptr;
1162 static inline struct btrfs_timespec *
1163 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1165 unsigned long ptr = (unsigned long)inode_item;
1166 ptr += offsetof(struct btrfs_inode_item, mtime);
1167 return (struct btrfs_timespec *)ptr;
1170 static inline struct btrfs_timespec *
1171 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1173 unsigned long ptr = (unsigned long)inode_item;
1174 ptr += offsetof(struct btrfs_inode_item, ctime);
1175 return (struct btrfs_timespec *)ptr;
1178 static inline struct btrfs_timespec *
1179 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1181 unsigned long ptr = (unsigned long)inode_item;
1182 ptr += offsetof(struct btrfs_inode_item, otime);
1183 return (struct btrfs_timespec *)ptr;
1186 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1187 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1188 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1190 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1193 /* struct btrfs_dev_extent */
1194 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1196 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1197 chunk_objectid, 64);
1198 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1200 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1202 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1204 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1205 return (u8 *)((unsigned long)dev + ptr);
1209 /* struct btrfs_extent_item */
1210 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1211 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1213 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1215 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1217 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1219 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1220 struct btrfs_tree_block_info *item,
1221 struct btrfs_disk_key *key)
1223 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1226 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1227 struct btrfs_tree_block_info *item,
1228 struct btrfs_disk_key *key)
1230 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1233 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1235 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1237 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1239 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1242 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1245 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1247 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1250 static inline u32 btrfs_extent_inline_ref_size(int type)
1252 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1253 type == BTRFS_SHARED_BLOCK_REF_KEY)
1254 return sizeof(struct btrfs_extent_inline_ref);
1255 if (type == BTRFS_SHARED_DATA_REF_KEY)
1256 return sizeof(struct btrfs_shared_data_ref) +
1257 sizeof(struct btrfs_extent_inline_ref);
1258 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1259 return sizeof(struct btrfs_extent_data_ref) +
1260 offsetof(struct btrfs_extent_inline_ref, offset);
1265 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1266 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1268 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1269 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1271 /* struct btrfs_node */
1272 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1273 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1275 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1278 ptr = offsetof(struct btrfs_node, ptrs) +
1279 sizeof(struct btrfs_key_ptr) * nr;
1280 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1283 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1287 ptr = offsetof(struct btrfs_node, ptrs) +
1288 sizeof(struct btrfs_key_ptr) * nr;
1289 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1292 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1295 ptr = offsetof(struct btrfs_node, ptrs) +
1296 sizeof(struct btrfs_key_ptr) * nr;
1297 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1300 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1304 ptr = offsetof(struct btrfs_node, ptrs) +
1305 sizeof(struct btrfs_key_ptr) * nr;
1306 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1309 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1311 return offsetof(struct btrfs_node, ptrs) +
1312 sizeof(struct btrfs_key_ptr) * nr;
1315 static inline void btrfs_node_key(struct extent_buffer *eb,
1316 struct btrfs_disk_key *disk_key, int nr)
1319 ptr = btrfs_node_key_ptr_offset(nr);
1320 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1321 struct btrfs_key_ptr, key, disk_key);
1324 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1325 struct btrfs_disk_key *disk_key, int nr)
1328 ptr = btrfs_node_key_ptr_offset(nr);
1329 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1330 struct btrfs_key_ptr, key, disk_key);
1333 /* struct btrfs_item */
1334 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1335 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1337 static inline unsigned long btrfs_item_nr_offset(int nr)
1339 return offsetof(struct btrfs_leaf, items) +
1340 sizeof(struct btrfs_item) * nr;
1343 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1346 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1349 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1350 struct btrfs_item *item)
1352 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1355 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1357 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1360 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1362 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1365 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1367 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1370 static inline void btrfs_item_key(struct extent_buffer *eb,
1371 struct btrfs_disk_key *disk_key, int nr)
1373 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1374 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1377 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1378 struct btrfs_disk_key *disk_key, int nr)
1380 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1381 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1384 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1387 * struct btrfs_root_ref
1389 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1390 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1391 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1393 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1394 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1395 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1397 /* struct btrfs_dir_item */
1398 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1399 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1400 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1401 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1403 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1404 struct btrfs_dir_item *item,
1405 struct btrfs_disk_key *key)
1407 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1410 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1411 struct btrfs_dir_item *item,
1412 struct btrfs_disk_key *key)
1414 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1417 /* struct btrfs_disk_key */
1418 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1420 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1421 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1423 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1424 struct btrfs_disk_key *disk)
1426 cpu->offset = le64_to_cpu(disk->offset);
1427 cpu->type = disk->type;
1428 cpu->objectid = le64_to_cpu(disk->objectid);
1431 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1432 struct btrfs_key *cpu)
1434 disk->offset = cpu_to_le64(cpu->offset);
1435 disk->type = cpu->type;
1436 disk->objectid = cpu_to_le64(cpu->objectid);
1439 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1440 struct btrfs_key *key, int nr)
1442 struct btrfs_disk_key disk_key;
1443 btrfs_node_key(eb, &disk_key, nr);
1444 btrfs_disk_key_to_cpu(key, &disk_key);
1447 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1448 struct btrfs_key *key, int nr)
1450 struct btrfs_disk_key disk_key;
1451 btrfs_item_key(eb, &disk_key, nr);
1452 btrfs_disk_key_to_cpu(key, &disk_key);
1455 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1456 struct btrfs_dir_item *item,
1457 struct btrfs_key *key)
1459 struct btrfs_disk_key disk_key;
1460 btrfs_dir_item_key(eb, item, &disk_key);
1461 btrfs_disk_key_to_cpu(key, &disk_key);
1465 static inline u8 btrfs_key_type(struct btrfs_key *key)
1470 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1475 /* struct btrfs_header */
1476 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1477 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1479 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1480 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1481 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1482 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1484 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1486 return (btrfs_header_flags(eb) & flag) == flag;
1489 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1491 u64 flags = btrfs_header_flags(eb);
1492 btrfs_set_header_flags(eb, flags | flag);
1493 return (flags & flag) == flag;
1496 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1498 u64 flags = btrfs_header_flags(eb);
1499 btrfs_set_header_flags(eb, flags & ~flag);
1500 return (flags & flag) == flag;
1503 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1505 u64 flags = btrfs_header_flags(eb);
1506 return flags >> BTRFS_BACKREF_REV_SHIFT;
1509 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1512 u64 flags = btrfs_header_flags(eb);
1513 flags &= ~BTRFS_BACKREF_REV_MASK;
1514 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1515 btrfs_set_header_flags(eb, flags);
1518 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1520 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1524 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1526 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1530 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1532 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1536 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1538 unsigned long ptr = offsetof(struct btrfs_header, csum);
1542 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1547 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1552 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1557 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1559 return (btrfs_header_level(eb) == 0);
1562 /* struct btrfs_root_item */
1563 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1565 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1566 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1567 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1569 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1571 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1572 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1573 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1574 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1575 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1576 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1577 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1578 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1582 /* struct btrfs_root_backup */
1583 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1585 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1587 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1588 tree_root_level, 8);
1590 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1592 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1593 chunk_root_gen, 64);
1594 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1595 chunk_root_level, 8);
1597 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1599 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1600 extent_root_gen, 64);
1601 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1602 extent_root_level, 8);
1604 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1606 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1608 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1611 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1613 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1615 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1618 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1620 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1622 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1623 csum_root_level, 8);
1624 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1626 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1628 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1631 /* struct btrfs_super_block */
1633 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1634 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1635 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1637 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1638 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1639 struct btrfs_super_block, sys_chunk_array_size, 32);
1640 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1641 struct btrfs_super_block, chunk_root_generation, 64);
1642 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1644 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1646 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1647 chunk_root_level, 8);
1648 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1650 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1651 log_root_transid, 64);
1652 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1654 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1656 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1658 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1660 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1662 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1664 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1666 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1667 root_dir_objectid, 64);
1668 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1670 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1672 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1674 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1675 incompat_flags, 64);
1676 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1678 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1679 cache_generation, 64);
1681 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1683 int t = btrfs_super_csum_type(s);
1684 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1685 return btrfs_csum_sizes[t];
1688 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1690 return offsetof(struct btrfs_leaf, items);
1693 /* struct btrfs_file_extent_item */
1694 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1695 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1697 static inline unsigned long btrfs_file_extent_inline_start(struct
1698 btrfs_file_extent_item *e)
1700 unsigned long offset = (unsigned long)e;
1701 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1705 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1707 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1710 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1712 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1714 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1716 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1718 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1719 disk_num_bytes, 64);
1720 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1722 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1724 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1726 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1728 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1730 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1732 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1734 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1736 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1738 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1739 other_encoding, 16);
1741 /* this returns the number of file bytes represented by the inline item.
1742 * If an item is compressed, this is the uncompressed size
1744 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
1745 struct btrfs_file_extent_item *e)
1747 return btrfs_file_extent_ram_bytes(eb, e);
1751 * this returns the number of bytes used by the item on disk, minus the
1752 * size of any extent headers. If a file is compressed on disk, this is
1753 * the compressed size
1755 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
1756 struct btrfs_item *e)
1758 unsigned long offset;
1759 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
1760 return btrfs_item_size(eb, e) - offset;
1763 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
1765 return root->leafsize;
1766 return root->nodesize;
1769 /* helper function to cast into the data area of the leaf. */
1770 #define btrfs_item_ptr(leaf, slot, type) \
1771 ((type *)(btrfs_leaf_data(leaf) + \
1772 btrfs_item_offset_nr(leaf, slot)))
1774 #define btrfs_item_ptr_offset(leaf, slot) \
1775 ((unsigned long)(btrfs_leaf_data(leaf) + \
1776 btrfs_item_offset_nr(leaf, slot)))
1779 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
1780 struct btrfs_root *root);
1781 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
1782 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
1783 btrfs_fs_info *info,
1785 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
1786 struct btrfs_block_group_cache
1787 *hint, u64 search_start,
1788 int data, int owner);
1789 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
1790 struct btrfs_root *root,
1791 u32 blocksize, u64 root_objectid,
1792 struct btrfs_disk_key *key, int level,
1793 u64 hint, u64 empty_size);
1794 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
1795 struct btrfs_root *root,
1796 u64 num_bytes, u64 parent,
1797 u64 root_objectid, u64 ref_generation,
1798 u64 owner, u64 empty_size, u64 hint_byte,
1799 u64 search_end, struct btrfs_key *ins, int data);
1800 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
1801 struct btrfs_root *root, u64 bytenr,
1802 u64 num_bytes, u64 *refs, u64 *flags);
1803 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
1804 struct btrfs_root *root,
1805 u64 bytenr, u64 num_bytes, u64 flags);
1806 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1807 struct extent_buffer *buf, int record_parent);
1808 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1809 struct extent_buffer *buf, int record_parent);
1810 int btrfs_free_extent(struct btrfs_trans_handle *trans,
1811 struct btrfs_root *root,
1812 u64 bytenr, u64 num_bytes, u64 parent,
1813 u64 root_objectid, u64 owner, u64 offset);
1814 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
1815 struct btrfs_root *root,
1816 struct extent_io_tree *unpin);
1817 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
1818 struct btrfs_root *root,
1819 u64 bytenr, u64 num_bytes, u64 parent,
1820 u64 root_objectid, u64 ref_generation,
1821 u64 owner_objectid);
1822 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
1823 struct btrfs_root *root, u64 bytenr,
1824 u64 orig_parent, u64 parent,
1825 u64 root_objectid, u64 ref_generation,
1826 u64 owner_objectid);
1827 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
1828 struct btrfs_root *root);
1829 int btrfs_free_block_groups(struct btrfs_fs_info *info);
1830 int btrfs_read_block_groups(struct btrfs_root *root);
1831 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
1832 struct btrfs_root *root, u64 bytes_used,
1833 u64 type, u64 chunk_objectid, u64 chunk_offset,
1835 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
1836 struct btrfs_root *root);
1837 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
1838 struct btrfs_root *root, u64 bytenr, u64 num,
1839 int alloc, int mark_free);
1841 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
1842 int level, int slot, u64 objectid);
1843 struct extent_buffer *read_node_slot(struct btrfs_root *root,
1844 struct extent_buffer *parent, int slot);
1845 int btrfs_previous_item(struct btrfs_root *root,
1846 struct btrfs_path *path, u64 min_objectid,
1848 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
1849 int btrfs_cow_block(struct btrfs_trans_handle *trans,
1850 struct btrfs_root *root, struct extent_buffer *buf,
1851 struct extent_buffer *parent, int parent_slot,
1852 struct extent_buffer **cow_ret);
1853 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
1854 struct btrfs_root *root,
1855 struct extent_buffer *buf,
1856 struct extent_buffer *parent, int parent_slot,
1857 struct extent_buffer **cow_ret,
1858 u64 search_start, u64 empty_size);
1859 int btrfs_copy_root(struct btrfs_trans_handle *trans,
1860 struct btrfs_root *root,
1861 struct extent_buffer *buf,
1862 struct extent_buffer **cow_ret, u64 new_root_objectid);
1863 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
1864 *root, struct btrfs_path *path, u32 data_size);
1865 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
1866 struct btrfs_root *root,
1867 struct btrfs_path *path,
1868 u32 new_size, int from_end);
1869 int btrfs_split_item(struct btrfs_trans_handle *trans,
1870 struct btrfs_root *root,
1871 struct btrfs_path *path,
1872 struct btrfs_key *new_key,
1873 unsigned long split_offset);
1874 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
1875 *root, struct btrfs_key *key, struct btrfs_path *p, int
1877 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
1878 struct btrfs_root *root, struct extent_buffer *parent,
1879 int start_slot, int cache_only, u64 *last_ret,
1880 struct btrfs_key *progress);
1881 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
1882 struct btrfs_path *btrfs_alloc_path(void);
1883 void btrfs_free_path(struct btrfs_path *p);
1884 void btrfs_init_path(struct btrfs_path *p);
1885 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1886 struct btrfs_path *path, int slot, int nr);
1888 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
1889 struct btrfs_root *root,
1890 struct btrfs_path *path)
1892 return btrfs_del_items(trans, root, path, path->slots[0], 1);
1895 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
1896 *root, struct btrfs_key *key, void *data, u32 data_size);
1897 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
1898 struct btrfs_root *root,
1899 struct btrfs_path *path,
1900 struct btrfs_key *cpu_key, u32 *data_size, int nr);
1902 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
1903 struct btrfs_root *root,
1904 struct btrfs_path *path,
1905 struct btrfs_key *key,
1908 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
1911 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
1912 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
1913 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
1914 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
1916 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
1917 struct btrfs_root *root, struct btrfs_path *path,
1918 struct btrfs_key *new_key);
1921 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
1922 struct btrfs_root *tree_root,
1923 u64 root_id, u8 type, u64 ref_id,
1924 u64 dirid, u64 sequence,
1925 const char *name, int name_len);
1926 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
1927 struct btrfs_key *key);
1928 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
1929 *root, struct btrfs_key *key, struct btrfs_root_item
1931 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
1932 *root, struct btrfs_key *key, struct btrfs_root_item
1934 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
1935 btrfs_root_item *item, struct btrfs_key *key);
1936 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
1937 struct btrfs_root *latest_root);
1939 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
1940 *root, const char *name, int name_len, u64 dir,
1941 struct btrfs_key *location, u8 type, u64 index);
1942 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
1943 struct btrfs_root *root,
1944 struct btrfs_path *path, u64 dir,
1945 const char *name, int name_len,
1947 struct btrfs_dir_item *
1948 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
1949 struct btrfs_root *root,
1950 struct btrfs_path *path, u64 dir,
1951 u64 objectid, const char *name, int name_len,
1953 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
1954 struct btrfs_path *path,
1955 const char *name, int name_len);
1956 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
1957 struct btrfs_root *root,
1958 struct btrfs_path *path,
1959 struct btrfs_dir_item *di);
1960 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
1961 struct btrfs_root *root, const char *name,
1962 u16 name_len, const void *data, u16 data_len,
1964 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
1965 struct btrfs_root *root,
1966 struct btrfs_path *path, u64 dir,
1967 const char *name, u16 name_len,
1970 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
1971 struct btrfs_root *fs_root,
1972 u64 dirid, u64 *objectid);
1973 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
1976 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
1977 struct btrfs_root *root,
1978 const char *name, int name_len,
1979 u64 inode_objectid, u64 ref_objectid, u64 index);
1980 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
1981 struct btrfs_root *root,
1982 const char *name, int name_len,
1983 u64 inode_objectid, u64 ref_objectid);
1984 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
1985 struct btrfs_root *root,
1986 struct btrfs_path *path, u64 objectid);
1987 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1988 *root, u64 objectid, struct btrfs_inode_item
1990 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
1991 *root, struct btrfs_path *path,
1992 struct btrfs_key *location, int mod);
1995 int btrfs_del_csums(struct btrfs_trans_handle *trans,
1996 struct btrfs_root *root, u64 bytenr, u64 len);
1997 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
1998 struct btrfs_root *root,
1999 u64 objectid, u64 pos, u64 offset,
2002 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2003 struct btrfs_root *root, u64 objectid,
2004 u64 offset, char *buffer, size_t size);
2005 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2006 struct btrfs_root *root,
2007 struct btrfs_path *path, u64 objectid,
2008 u64 bytenr, int mod);
2009 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2010 struct btrfs_root *root, u64 alloc_end,
2011 u64 bytenr, char *data, size_t len);
2012 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2013 struct btrfs_root *root,
2014 struct btrfs_path *path,
2015 u64 bytenr, int cow);
2016 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2017 struct btrfs_root *root, struct btrfs_path *path,