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.
19 #ifndef __BTRFS_CTREE_H__
20 #define __BTRFS_CTREE_H__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle;
40 struct btrfs_free_space_ctl;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
43 #define BTRFS_MAX_MIRRORS 3
45 #define BTRFS_MAX_LEVEL 8
47 #define BTRFS_COMPAT_EXTENT_TREE_V0
49 /* holds pointers to all of the tree roots */
50 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
52 /* stores information about which extents are in use, and reference counts */
53 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
56 * chunk tree stores translations from logical -> physical block numbering
57 * the super block points to the chunk tree
59 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
62 * stores information about which areas of a given device are in use.
63 * one per device. The tree of tree roots points to the device tree
65 #define BTRFS_DEV_TREE_OBJECTID 4ULL
67 /* one per subvolume, storing files and directories */
68 #define BTRFS_FS_TREE_OBJECTID 5ULL
70 /* directory objectid inside the root tree */
71 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
74 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
76 /* for storing items that use the BTRFS_UUID_KEY* */
77 #define BTRFS_UUID_TREE_OBJECTID 9ULL
79 /* for storing balance parameters in the root tree */
80 #define BTRFS_BALANCE_OBJECTID -4ULL
82 /* oprhan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* For storing free space cache */
101 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
104 * The inode number assigned to the special inode for sotring
107 #define BTRFS_FREE_INO_OBJECTID -12ULL
109 /* dummy objectid represents multiple objectids */
110 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
113 * All files have objectids in this range.
115 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
116 #define BTRFS_LAST_FREE_OBJECTID -256ULL
117 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
122 * the device items go into the chunk tree. The key is in the form
123 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
125 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
128 * the max metadata block size. This limit is somewhat artificial,
129 * but the memmove costs go through the roof for larger blocks.
131 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
134 * we can actually store much bigger names, but lets not confuse the rest
137 #define BTRFS_NAME_LEN 255
140 * Theoretical limit is larger, but we keep this down to a sane
141 * value. That should limit greatly the possibility of collisions on
144 #define BTRFS_LINK_MAX 65535U
146 /* 32 bytes in various csum fields */
147 #define BTRFS_CSUM_SIZE 32
150 #define BTRFS_CSUM_TYPE_CRC32 0
152 static int btrfs_csum_sizes[] = { 4, 0 };
154 /* four bytes for CRC32 */
155 #define BTRFS_CRC32_SIZE 4
156 #define BTRFS_EMPTY_DIR_SIZE 0
158 #define BTRFS_FT_UNKNOWN 0
159 #define BTRFS_FT_REG_FILE 1
160 #define BTRFS_FT_DIR 2
161 #define BTRFS_FT_CHRDEV 3
162 #define BTRFS_FT_BLKDEV 4
163 #define BTRFS_FT_FIFO 5
164 #define BTRFS_FT_SOCK 6
165 #define BTRFS_FT_SYMLINK 7
166 #define BTRFS_FT_XATTR 8
167 #define BTRFS_FT_MAX 9
169 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
172 * the key defines the order in the tree, and so it also defines (optimal)
173 * block layout. objectid corresonds to the inode number. The flags
174 * tells us things about the object, and is a kind of stream selector.
175 * so for a given inode, keys with flags of 1 might refer to the inode
176 * data, flags of 2 may point to file data in the btree and flags == 3
177 * may point to extents.
179 * offset is the starting byte offset for this key in the stream.
181 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
182 * in cpu native order. Otherwise they are identical and their sizes
183 * should be the same (ie both packed)
185 struct btrfs_disk_key {
189 } __attribute__ ((__packed__));
195 } __attribute__ ((__packed__));
197 struct btrfs_mapping_tree {
198 struct cache_tree cache_tree;
201 #define BTRFS_UUID_SIZE 16
202 struct btrfs_dev_item {
203 /* the internal btrfs device id */
206 /* size of the device */
212 /* optimal io alignment for this device */
215 /* optimal io width for this device */
218 /* minimal io size for this device */
221 /* type and info about this device */
224 /* expected generation for this device */
228 * starting byte of this partition on the device,
229 * to allowr for stripe alignment in the future
233 /* grouping information for allocation decisions */
236 /* seek speed 0-100 where 100 is fastest */
239 /* bandwidth 0-100 where 100 is fastest */
242 /* btrfs generated uuid for this device */
243 u8 uuid[BTRFS_UUID_SIZE];
245 /* uuid of FS who owns this device */
246 u8 fsid[BTRFS_UUID_SIZE];
247 } __attribute__ ((__packed__));
249 struct btrfs_stripe {
252 u8 dev_uuid[BTRFS_UUID_SIZE];
253 } __attribute__ ((__packed__));
256 /* size of this chunk in bytes */
259 /* objectid of the root referencing this chunk */
265 /* optimal io alignment for this chunk */
268 /* optimal io width for this chunk */
271 /* minimal io size for this chunk */
274 /* 2^16 stripes is quite a lot, a second limit is the size of a single
279 /* sub stripes only matter for raid10 */
281 struct btrfs_stripe stripe;
282 /* additional stripes go here */
283 } __attribute__ ((__packed__));
285 #define BTRFS_FREE_SPACE_EXTENT 1
286 #define BTRFS_FREE_SPACE_BITMAP 2
288 struct btrfs_free_space_entry {
292 } __attribute__ ((__packed__));
294 struct btrfs_free_space_header {
295 struct btrfs_disk_key location;
299 } __attribute__ ((__packed__));
301 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
303 BUG_ON(num_stripes == 0);
304 return sizeof(struct btrfs_chunk) +
305 sizeof(struct btrfs_stripe) * (num_stripes - 1);
308 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
309 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
310 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
311 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
313 #define BTRFS_BACKREF_REV_MAX 256
314 #define BTRFS_BACKREF_REV_SHIFT 56
315 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
316 BTRFS_BACKREF_REV_SHIFT)
318 #define BTRFS_OLD_BACKREF_REV 0
319 #define BTRFS_MIXED_BACKREF_REV 1
322 * every tree block (leaf or node) starts with this header.
324 struct btrfs_header {
325 /* these first four must match the super block */
326 u8 csum[BTRFS_CSUM_SIZE];
327 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
328 __le64 bytenr; /* which block this node is supposed to live in */
331 /* allowed to be different from the super from here on down */
332 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
337 } __attribute__ ((__packed__));
339 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
340 sizeof(struct btrfs_header)) / \
341 sizeof(struct btrfs_key_ptr))
342 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
343 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
344 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
345 sizeof(struct btrfs_item) - \
346 sizeof(struct btrfs_file_extent_item))
347 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
348 sizeof(struct btrfs_item) -\
349 sizeof(struct btrfs_dir_item))
353 * this is a very generous portion of the super block, giving us
354 * room to translate 14 chunks with 3 stripes each.
356 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
357 #define BTRFS_LABEL_SIZE 256
360 * just in case we somehow lose the roots and are not able to mount,
361 * we store an array of the roots from previous transactions
364 #define BTRFS_NUM_BACKUP_ROOTS 4
365 struct btrfs_root_backup {
367 __le64 tree_root_gen;
370 __le64 chunk_root_gen;
373 __le64 extent_root_gen;
382 __le64 csum_root_gen;
392 u8 extent_root_level;
396 /* future and to align */
398 } __attribute__ ((__packed__));
401 * the super block basically lists the main trees of the FS
402 * it currently lacks any block count etc etc
404 struct btrfs_super_block {
405 u8 csum[BTRFS_CSUM_SIZE];
406 /* the first 3 fields must match struct btrfs_header */
407 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
408 __le64 bytenr; /* this block number */
411 /* allowed to be different from the btrfs_header from here own down */
418 /* this will help find the new super based on the log root */
419 __le64 log_root_transid;
422 __le64 root_dir_objectid;
428 __le32 sys_chunk_array_size;
429 __le64 chunk_root_generation;
431 __le64 compat_ro_flags;
432 __le64 incompat_flags;
437 struct btrfs_dev_item dev_item;
439 char label[BTRFS_LABEL_SIZE];
441 __le64 cache_generation;
442 __le64 uuid_tree_generation;
444 /* future expansion */
446 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
447 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
448 } __attribute__ ((__packed__));
451 * Compat flags that we support. If any incompat flags are set other than the
452 * ones specified below then we will fail to mount
454 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
455 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
456 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
457 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
460 * some patches floated around with a second compression method
461 * lets save that incompat here for when they do get in
462 * Note we don't actually support it, we're just reserving the
465 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
468 * older kernels tried to do bigger metadata blocks, but the
469 * code was pretty buggy. Lets not let them try anymore.
471 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
472 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
473 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
474 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
475 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
478 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
479 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
480 #define BTRFS_FEATURE_INCOMPAT_SUPP \
481 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
482 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
483 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
484 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
485 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
486 BTRFS_FEATURE_INCOMPAT_RAID56 | \
487 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
488 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
489 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
492 * A leaf is full of items. offset and size tell us where to find
493 * the item in the leaf (relative to the start of the data area)
496 struct btrfs_disk_key key;
499 } __attribute__ ((__packed__));
502 * leaves have an item area and a data area:
503 * [item0, item1....itemN] [free space] [dataN...data1, data0]
505 * The data is separate from the items to get the keys closer together
509 struct btrfs_header header;
510 struct btrfs_item items[];
511 } __attribute__ ((__packed__));
514 * all non-leaf blocks are nodes, they hold only keys and pointers to
517 struct btrfs_key_ptr {
518 struct btrfs_disk_key key;
521 } __attribute__ ((__packed__));
524 struct btrfs_header header;
525 struct btrfs_key_ptr ptrs[];
526 } __attribute__ ((__packed__));
529 * btrfs_paths remember the path taken from the root down to the leaf.
530 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
531 * to any other levels that are present.
533 * The slots array records the index of the item or block pointer
534 * used while walking the tree.
538 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
539 int slots[BTRFS_MAX_LEVEL];
540 /* if there is real range locking, this locks field will change */
541 int locks[BTRFS_MAX_LEVEL];
543 /* keep some upper locks as we walk down */
547 * set by btrfs_split_item, tells search_slot to keep all locks
548 * and to force calls to keep space in the nodes
550 unsigned int search_for_split:1;
551 unsigned int skip_check_block:1;
555 * items in the extent btree are used to record the objectid of the
556 * owner of the block and the number of references
559 struct btrfs_extent_item {
563 } __attribute__ ((__packed__));
565 struct btrfs_extent_item_v0 {
567 } __attribute__ ((__packed__));
569 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
570 sizeof(struct btrfs_item))
572 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
573 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
575 /* following flags only apply to tree blocks */
577 /* use full backrefs for extent pointers in the block*/
578 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
580 struct btrfs_tree_block_info {
581 struct btrfs_disk_key key;
583 } __attribute__ ((__packed__));
585 struct btrfs_extent_data_ref {
590 } __attribute__ ((__packed__));
592 struct btrfs_shared_data_ref {
594 } __attribute__ ((__packed__));
596 struct btrfs_extent_inline_ref {
599 } __attribute__ ((__packed__));
601 struct btrfs_extent_ref_v0 {
606 } __attribute__ ((__packed__));
608 /* dev extents record free space on individual devices. The owner
609 * field points back to the chunk allocation mapping tree that allocated
610 * the extent. The chunk tree uuid field is a way to double check the owner
612 struct btrfs_dev_extent {
614 __le64 chunk_objectid;
617 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
618 } __attribute__ ((__packed__));
620 struct btrfs_inode_ref {
624 } __attribute__ ((__packed__));
626 struct btrfs_inode_extref {
627 __le64 parent_objectid;
630 __u8 name[0]; /* name goes here */
631 } __attribute__ ((__packed__));
633 struct btrfs_timespec {
636 } __attribute__ ((__packed__));
639 BTRFS_COMPRESS_NONE = 0,
640 BTRFS_COMPRESS_ZLIB = 1,
641 BTRFS_COMPRESS_LZO = 2,
642 BTRFS_COMPRESS_TYPES = 2,
643 BTRFS_COMPRESS_LAST = 3,
644 } btrfs_compression_type;
646 /* we don't understand any encryption methods right now */
648 BTRFS_ENCRYPTION_NONE = 0,
649 BTRFS_ENCRYPTION_LAST = 1,
650 } btrfs_encryption_type;
652 enum btrfs_tree_block_status {
653 BTRFS_TREE_BLOCK_CLEAN,
654 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
655 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
656 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
657 BTRFS_TREE_BLOCK_INVALID_LEVEL,
658 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
659 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
662 struct btrfs_inode_item {
663 /* nfs style generation number */
665 /* transid that last touched this inode */
677 /* modification sequence number for NFS */
681 * a little future expansion, for more than this we can
682 * just grow the inode item and version it
685 struct btrfs_timespec atime;
686 struct btrfs_timespec ctime;
687 struct btrfs_timespec mtime;
688 struct btrfs_timespec otime;
689 } __attribute__ ((__packed__));
691 struct btrfs_dir_log_item {
693 } __attribute__ ((__packed__));
695 struct btrfs_dir_item {
696 struct btrfs_disk_key location;
701 } __attribute__ ((__packed__));
703 struct btrfs_root_item_v0 {
704 struct btrfs_inode_item inode;
710 __le64 last_snapshot;
713 struct btrfs_disk_key drop_progress;
716 } __attribute__ ((__packed__));
718 struct btrfs_root_item {
719 struct btrfs_inode_item inode;
725 __le64 last_snapshot;
728 struct btrfs_disk_key drop_progress;
733 * The following fields appear after subvol_uuids+subvol_times
738 * This generation number is used to test if the new fields are valid
739 * and up to date while reading the root item. Everytime the root item
740 * is written out, the "generation" field is copied into this field. If
741 * anyone ever mounted the fs with an older kernel, we will have
742 * mismatching generation values here and thus must invalidate the
743 * new fields. See btrfs_update_root and btrfs_find_last_root for
745 * the offset of generation_v2 is also used as the start for the memset
746 * when invalidating the fields.
748 __le64 generation_v2;
749 u8 uuid[BTRFS_UUID_SIZE];
750 u8 parent_uuid[BTRFS_UUID_SIZE];
751 u8 received_uuid[BTRFS_UUID_SIZE];
752 __le64 ctransid; /* updated when an inode changes */
753 __le64 otransid; /* trans when created */
754 __le64 stransid; /* trans when sent. non-zero for received subvol */
755 __le64 rtransid; /* trans when received. non-zero for received subvol */
756 struct btrfs_timespec ctime;
757 struct btrfs_timespec otime;
758 struct btrfs_timespec stime;
759 struct btrfs_timespec rtime;
760 __le64 reserved[8]; /* for future */
761 } __attribute__ ((__packed__));
764 * this is used for both forward and backward root refs
766 struct btrfs_root_ref {
770 } __attribute__ ((__packed__));
772 #define BTRFS_FILE_EXTENT_INLINE 0
773 #define BTRFS_FILE_EXTENT_REG 1
774 #define BTRFS_FILE_EXTENT_PREALLOC 2
776 struct btrfs_file_extent_item {
778 * transaction id that created this extent
782 * max number of bytes to hold this extent in ram
783 * when we split a compressed extent we can't know how big
784 * each of the resulting pieces will be. So, this is
785 * an upper limit on the size of the extent in ram instead of
791 * 32 bits for the various ways we might encode the data,
792 * including compression and encryption. If any of these
793 * are set to something a given disk format doesn't understand
794 * it is treated like an incompat flag for reading and writing,
799 __le16 other_encoding; /* spare for later use */
801 /* are we inline data or a real extent? */
805 * disk space consumed by the extent, checksum blocks are included
809 __le64 disk_num_bytes;
811 * the logical offset in file blocks (no csums)
812 * this extent record is for. This allows a file extent to point
813 * into the middle of an existing extent on disk, sharing it
814 * between two snapshots (useful if some bytes in the middle of the
815 * extent have changed
819 * the logical number of file blocks (no csums included)
823 } __attribute__ ((__packed__));
825 struct btrfs_csum_item {
827 } __attribute__ ((__packed__));
830 * We don't want to overwrite 1M at the beginning of device, even though
831 * there is our 1st superblock at 64k. Some possible reasons:
832 * - the first 64k blank is useful for some boot loader/manager
833 * - the first 1M could be scratched by buggy partitioner or somesuch
835 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
837 /* tag for the radix tree of block groups in ram */
838 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
839 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
840 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
841 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
842 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
843 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
844 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
845 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
846 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
847 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
848 #define BTRFS_NR_RAID_TYPES 7
850 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
851 BTRFS_BLOCK_GROUP_SYSTEM | \
852 BTRFS_BLOCK_GROUP_METADATA)
854 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
855 BTRFS_BLOCK_GROUP_RAID1 | \
856 BTRFS_BLOCK_GROUP_RAID5 | \
857 BTRFS_BLOCK_GROUP_RAID6 | \
858 BTRFS_BLOCK_GROUP_DUP | \
859 BTRFS_BLOCK_GROUP_RAID10)
861 /* used in struct btrfs_balance_args fields */
862 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
865 * GLOBAL_RSV does not exist as a on-disk block group type and is used
866 * internally for exporting info about global block reserve from space infos
868 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
870 #define BTRFS_QGROUP_STATUS_OFF 0
871 #define BTRFS_QGROUP_STATUS_ON 1
872 #define BTRFS_QGROUP_STATUS_SCANNING 2
874 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
876 struct btrfs_qgroup_status_item {
880 __le64 scan; /* progress during scanning */
881 } __attribute__ ((__packed__));
883 struct btrfs_block_group_item {
885 __le64 chunk_objectid;
887 } __attribute__ ((__packed__));
889 struct btrfs_qgroup_info_item {
892 __le64 referenced_compressed;
894 __le64 exclusive_compressed;
895 } __attribute__ ((__packed__));
897 /* flags definition for qgroup limits */
898 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
899 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
900 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
901 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
902 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
903 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
905 struct btrfs_qgroup_limit_item {
907 __le64 max_referenced;
908 __le64 max_exclusive;
909 __le64 rsv_referenced;
910 __le64 rsv_exclusive;
911 } __attribute__ ((__packed__));
913 struct btrfs_space_info {
919 struct list_head list;
922 struct btrfs_block_group_cache {
923 struct cache_extent cache;
924 struct btrfs_key key;
925 struct btrfs_block_group_item item;
926 struct btrfs_space_info *space_info;
927 struct btrfs_free_space_ctl *free_space_ctl;
934 struct btrfs_extent_ops {
935 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
936 u64 hint_byte, struct btrfs_key *ins);
937 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
942 struct btrfs_fs_devices;
943 struct btrfs_fs_info {
944 u8 fsid[BTRFS_FSID_SIZE];
945 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
946 struct btrfs_root *fs_root;
947 struct btrfs_root *extent_root;
948 struct btrfs_root *tree_root;
949 struct btrfs_root *chunk_root;
950 struct btrfs_root *dev_root;
951 struct btrfs_root *csum_root;
952 struct btrfs_root *quota_root;
954 struct rb_root fs_root_tree;
956 /* the log root tree is a directory of all the other log roots */
957 struct btrfs_root *log_root_tree;
959 struct extent_io_tree extent_cache;
960 struct extent_io_tree free_space_cache;
961 struct extent_io_tree block_group_cache;
962 struct extent_io_tree pinned_extents;
963 struct extent_io_tree pending_del;
964 struct extent_io_tree extent_ins;
966 /* logical->physical extent mapping */
967 struct btrfs_mapping_tree mapping_tree;
970 u64 last_trans_committed;
972 u64 avail_data_alloc_bits;
973 u64 avail_metadata_alloc_bits;
974 u64 avail_system_alloc_bits;
975 u64 data_alloc_profile;
976 u64 metadata_alloc_profile;
977 u64 system_alloc_profile;
980 struct btrfs_trans_handle *running_transaction;
981 struct btrfs_super_block *super_copy;
982 struct mutex fs_mutex;
987 struct btrfs_extent_ops *extent_ops;
988 struct list_head dirty_cowonly_roots;
989 struct list_head recow_ebs;
991 struct btrfs_fs_devices *fs_devices;
992 struct list_head space_info;
995 unsigned int readonly:1;
996 unsigned int on_restoring:1;
997 unsigned int is_chunk_recover:1;
998 unsigned int quota_enabled:1;
1000 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1001 struct btrfs_root *root,
1002 u64 bytenr, u64 num_bytes, u64 parent,
1003 u64 root_objectid, u64 owner, u64 offset,
1005 struct cache_tree *fsck_extent_cache;
1006 struct cache_tree *corrupt_blocks;
1010 * in ram representation of the tree. extent_root is used for all allocations
1011 * and for the extent tree extent_root root.
1014 struct extent_buffer *node;
1015 struct extent_buffer *commit_root;
1016 struct btrfs_root_item root_item;
1017 struct btrfs_key root_key;
1018 struct btrfs_fs_info *fs_info;
1022 /* data allocations are done in sectorsize units */
1025 /* node allocations are done in nodesize units */
1028 /* leaf allocations are done in leafsize units */
1031 /* leaf allocations are done in leafsize units */
1040 u64 last_inode_alloc;
1043 * Record orphan data extent ref
1045 * TODO: Don't restore things in btrfs_root.
1046 * Directly record it into inode_record, which needs a lot of
1047 * infrastructure change to allow cooperation between extent
1050 struct list_head orphan_data_extents;
1052 /* the dirty list is only used by non-reference counted roots */
1053 struct list_head dirty_list;
1054 struct rb_node rb_node;
1058 * inode items have the data typically returned from stat and store other
1059 * info about object characteristics. There is one for every file and dir in
1062 #define BTRFS_INODE_ITEM_KEY 1
1063 #define BTRFS_INODE_REF_KEY 12
1064 #define BTRFS_INODE_EXTREF_KEY 13
1065 #define BTRFS_XATTR_ITEM_KEY 24
1066 #define BTRFS_ORPHAN_ITEM_KEY 48
1068 #define BTRFS_DIR_LOG_ITEM_KEY 60
1069 #define BTRFS_DIR_LOG_INDEX_KEY 72
1071 * dir items are the name -> inode pointers in a directory. There is one
1072 * for every name in a directory.
1074 #define BTRFS_DIR_ITEM_KEY 84
1075 #define BTRFS_DIR_INDEX_KEY 96
1078 * extent data is for file data
1080 #define BTRFS_EXTENT_DATA_KEY 108
1083 * csum items have the checksums for data in the extents
1085 #define BTRFS_CSUM_ITEM_KEY 120
1087 * extent csums are stored in a separate tree and hold csums for
1088 * an entire extent on disk.
1090 #define BTRFS_EXTENT_CSUM_KEY 128
1093 * root items point to tree roots. There are typically in the root
1094 * tree used by the super block to find all the other trees
1096 #define BTRFS_ROOT_ITEM_KEY 132
1099 * root backrefs tie subvols and snapshots to the directory entries that
1102 #define BTRFS_ROOT_BACKREF_KEY 144
1105 * root refs make a fast index for listing all of the snapshots and
1106 * subvolumes referenced by a given root. They point directly to the
1107 * directory item in the root that references the subvol
1109 #define BTRFS_ROOT_REF_KEY 156
1112 * extent items are in the extent map tree. These record which blocks
1113 * are used, and how many references there are to each block
1115 #define BTRFS_EXTENT_ITEM_KEY 168
1118 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1119 * the length, so we save the level in key->offset instead of the length.
1121 #define BTRFS_METADATA_ITEM_KEY 169
1123 #define BTRFS_TREE_BLOCK_REF_KEY 176
1125 #define BTRFS_EXTENT_DATA_REF_KEY 178
1127 /* old style extent backrefs */
1128 #define BTRFS_EXTENT_REF_V0_KEY 180
1130 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1132 #define BTRFS_SHARED_DATA_REF_KEY 184
1136 * block groups give us hints into the extent allocation trees. Which
1137 * blocks are free etc etc
1139 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1141 #define BTRFS_DEV_EXTENT_KEY 204
1142 #define BTRFS_DEV_ITEM_KEY 216
1143 #define BTRFS_CHUNK_ITEM_KEY 228
1145 #define BTRFS_BALANCE_ITEM_KEY 248
1150 #define BTRFS_QGROUP_STATUS_KEY 240
1151 #define BTRFS_QGROUP_INFO_KEY 242
1152 #define BTRFS_QGROUP_LIMIT_KEY 244
1153 #define BTRFS_QGROUP_RELATION_KEY 246
1156 * Persistently stores the io stats in the device tree.
1157 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1159 #define BTRFS_DEV_STATS_KEY 249
1162 * Persistently stores the device replace state in the device tree.
1163 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1165 #define BTRFS_DEV_REPLACE_KEY 250
1168 * Stores items that allow to quickly map UUIDs to something else.
1169 * These items are part of the filesystem UUID tree.
1170 * The key is built like this:
1171 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1173 #if BTRFS_UUID_SIZE != 16
1174 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1176 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1177 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1178 * received subvols */
1181 * string items are for debugging. They just store a short string of
1184 #define BTRFS_STRING_ITEM_KEY 253
1188 #define BTRFS_INODE_NODATASUM (1 << 0)
1189 #define BTRFS_INODE_NODATACOW (1 << 1)
1190 #define BTRFS_INODE_READONLY (1 << 2)
1192 #define read_eb_member(eb, ptr, type, member, result) ( \
1193 read_extent_buffer(eb, (char *)(result), \
1194 ((unsigned long)(ptr)) + \
1195 offsetof(type, member), \
1196 sizeof(((type *)0)->member)))
1198 #define write_eb_member(eb, ptr, type, member, result) ( \
1199 write_extent_buffer(eb, (char *)(result), \
1200 ((unsigned long)(ptr)) + \
1201 offsetof(type, member), \
1202 sizeof(((type *)0)->member)))
1204 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1205 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1207 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1208 return le##bits##_to_cpu(h->member); \
1210 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1213 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1214 h->member = cpu_to_le##bits(val); \
1217 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1218 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1221 unsigned long offset = (unsigned long)s; \
1222 const type *p = (type *) (eb->data + offset); \
1223 return get_unaligned_le##bits(&p->member); \
1225 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1226 type *s, u##bits val) \
1228 unsigned long offset = (unsigned long)s; \
1229 type *p = (type *) (eb->data + offset); \
1230 put_unaligned_le##bits(val, &p->member); \
1233 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1234 static inline u##bits btrfs_##name(const type *s) \
1236 return le##bits##_to_cpu(s->member); \
1238 static inline void btrfs_set_##name(type *s, u##bits val) \
1240 s->member = cpu_to_le##bits(val); \
1243 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1244 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1245 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1246 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1247 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1248 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1250 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1251 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1252 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1253 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1254 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1255 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1257 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1258 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1260 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1262 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1264 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1266 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1268 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1269 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1271 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1273 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1275 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1278 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1280 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1283 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1285 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1288 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1289 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1290 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1291 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1292 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1293 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1294 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1295 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1296 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1297 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1298 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1300 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1302 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1306 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1307 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1309 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1311 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1313 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1315 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1316 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1318 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1320 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1321 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1323 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1326 unsigned long offset = (unsigned long)c;
1327 offset += offsetof(struct btrfs_chunk, stripe);
1328 offset += nr * sizeof(struct btrfs_stripe);
1329 return (struct btrfs_stripe *)offset;
1332 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1334 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1337 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1338 struct btrfs_chunk *c, int nr)
1340 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1343 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1344 struct btrfs_chunk *c, int nr,
1347 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1350 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1351 struct btrfs_chunk *c, int nr)
1353 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1356 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1357 struct btrfs_chunk *c, int nr,
1360 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1363 /* struct btrfs_block_group_item */
1364 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1366 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1368 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1369 struct btrfs_block_group_item, chunk_objectid, 64);
1371 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1372 struct btrfs_block_group_item, chunk_objectid, 64);
1373 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1374 struct btrfs_block_group_item, flags, 64);
1375 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1376 struct btrfs_block_group_item, flags, 64);
1378 /* struct btrfs_inode_ref */
1379 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1380 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1381 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1383 /* struct btrfs_inode_extref */
1384 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1385 parent_objectid, 64);
1386 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1388 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1390 /* struct btrfs_inode_item */
1391 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1392 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1393 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1394 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1395 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1396 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1397 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1398 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1399 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1400 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1401 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1402 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1404 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1405 struct btrfs_inode_item, generation, 64);
1406 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1407 struct btrfs_inode_item, generation, 64);
1408 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1409 struct btrfs_inode_item, size, 64);
1410 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1411 struct btrfs_inode_item, nbytes, 64);
1412 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1413 struct btrfs_inode_item, block_group, 64);
1414 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1415 struct btrfs_inode_item, nlink, 32);
1416 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1417 struct btrfs_inode_item, uid, 32);
1418 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1419 struct btrfs_inode_item, gid, 32);
1420 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1421 struct btrfs_inode_item, mode, 32);
1422 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1423 struct btrfs_inode_item, rdev, 64);
1424 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1425 struct btrfs_inode_item, flags, 64);
1427 static inline struct btrfs_timespec *
1428 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1430 unsigned long ptr = (unsigned long)inode_item;
1431 ptr += offsetof(struct btrfs_inode_item, atime);
1432 return (struct btrfs_timespec *)ptr;
1435 static inline struct btrfs_timespec *
1436 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1438 unsigned long ptr = (unsigned long)inode_item;
1439 ptr += offsetof(struct btrfs_inode_item, mtime);
1440 return (struct btrfs_timespec *)ptr;
1443 static inline struct btrfs_timespec *
1444 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1446 unsigned long ptr = (unsigned long)inode_item;
1447 ptr += offsetof(struct btrfs_inode_item, ctime);
1448 return (struct btrfs_timespec *)ptr;
1451 static inline struct btrfs_timespec *
1452 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1454 unsigned long ptr = (unsigned long)inode_item;
1455 ptr += offsetof(struct btrfs_inode_item, otime);
1456 return (struct btrfs_timespec *)ptr;
1459 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1460 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1461 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1463 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1466 /* struct btrfs_dev_extent */
1467 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1469 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1470 chunk_objectid, 64);
1471 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1473 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1475 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1477 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1478 return (u8 *)((unsigned long)dev + ptr);
1482 /* struct btrfs_extent_item */
1483 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1484 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1485 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1487 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1488 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1490 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1492 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1494 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1495 struct btrfs_tree_block_info *item,
1496 struct btrfs_disk_key *key)
1498 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1501 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1502 struct btrfs_tree_block_info *item,
1503 struct btrfs_disk_key *key)
1505 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1508 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1510 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1512 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1514 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1517 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1520 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1522 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1524 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1525 struct btrfs_extent_inline_ref, type, 8);
1526 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1527 struct btrfs_extent_inline_ref, offset, 64);
1529 static inline u32 btrfs_extent_inline_ref_size(int type)
1531 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1532 type == BTRFS_SHARED_BLOCK_REF_KEY)
1533 return sizeof(struct btrfs_extent_inline_ref);
1534 if (type == BTRFS_SHARED_DATA_REF_KEY)
1535 return sizeof(struct btrfs_shared_data_ref) +
1536 sizeof(struct btrfs_extent_inline_ref);
1537 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1538 return sizeof(struct btrfs_extent_data_ref) +
1539 offsetof(struct btrfs_extent_inline_ref, offset);
1544 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1545 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1547 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1548 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1550 /* struct btrfs_node */
1551 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1552 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1554 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1557 ptr = offsetof(struct btrfs_node, ptrs) +
1558 sizeof(struct btrfs_key_ptr) * nr;
1559 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1562 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1566 ptr = offsetof(struct btrfs_node, ptrs) +
1567 sizeof(struct btrfs_key_ptr) * nr;
1568 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1571 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1574 ptr = offsetof(struct btrfs_node, ptrs) +
1575 sizeof(struct btrfs_key_ptr) * nr;
1576 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1579 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1583 ptr = offsetof(struct btrfs_node, ptrs) +
1584 sizeof(struct btrfs_key_ptr) * nr;
1585 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1588 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1590 return offsetof(struct btrfs_node, ptrs) +
1591 sizeof(struct btrfs_key_ptr) * nr;
1594 static inline void btrfs_node_key(struct extent_buffer *eb,
1595 struct btrfs_disk_key *disk_key, int nr)
1598 ptr = btrfs_node_key_ptr_offset(nr);
1599 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1600 struct btrfs_key_ptr, key, disk_key);
1603 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1604 struct btrfs_disk_key *disk_key, int nr)
1607 ptr = btrfs_node_key_ptr_offset(nr);
1608 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1609 struct btrfs_key_ptr, key, disk_key);
1612 /* struct btrfs_item */
1613 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1614 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1616 static inline unsigned long btrfs_item_nr_offset(int nr)
1618 return offsetof(struct btrfs_leaf, items) +
1619 sizeof(struct btrfs_item) * nr;
1622 static inline struct btrfs_item *btrfs_item_nr(int nr)
1624 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1627 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1628 struct btrfs_item *item)
1630 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1633 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1635 return btrfs_item_end(eb, btrfs_item_nr(nr));
1638 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1640 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1643 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1645 return btrfs_item_size(eb, btrfs_item_nr(nr));
1648 static inline void btrfs_item_key(struct extent_buffer *eb,
1649 struct btrfs_disk_key *disk_key, int nr)
1651 struct btrfs_item *item = btrfs_item_nr(nr);
1652 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1655 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1656 struct btrfs_disk_key *disk_key, int nr)
1658 struct btrfs_item *item = btrfs_item_nr(nr);
1659 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1662 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1665 * struct btrfs_root_ref
1667 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1668 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1669 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1671 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1672 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1673 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1675 /* struct btrfs_dir_item */
1676 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1677 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1678 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1679 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1681 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1683 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1684 struct btrfs_dir_item *item,
1685 struct btrfs_disk_key *key)
1687 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1690 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1691 struct btrfs_dir_item *item,
1692 struct btrfs_disk_key *key)
1694 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1697 /* struct btrfs_free_space_header */
1698 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1700 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1702 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1705 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1706 struct btrfs_free_space_header *h,
1707 struct btrfs_disk_key *key)
1709 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1712 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1713 struct btrfs_free_space_header *h,
1714 struct btrfs_disk_key *key)
1716 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1719 /* struct btrfs_disk_key */
1720 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1722 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1723 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1725 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1726 struct btrfs_disk_key *disk)
1728 cpu->offset = le64_to_cpu(disk->offset);
1729 cpu->type = disk->type;
1730 cpu->objectid = le64_to_cpu(disk->objectid);
1733 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1734 struct btrfs_key *cpu)
1736 disk->offset = cpu_to_le64(cpu->offset);
1737 disk->type = cpu->type;
1738 disk->objectid = cpu_to_le64(cpu->objectid);
1741 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1742 struct btrfs_key *key, int nr)
1744 struct btrfs_disk_key disk_key;
1745 btrfs_node_key(eb, &disk_key, nr);
1746 btrfs_disk_key_to_cpu(key, &disk_key);
1749 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1750 struct btrfs_key *key, int nr)
1752 struct btrfs_disk_key disk_key;
1753 btrfs_item_key(eb, &disk_key, nr);
1754 btrfs_disk_key_to_cpu(key, &disk_key);
1757 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1758 struct btrfs_dir_item *item,
1759 struct btrfs_key *key)
1761 struct btrfs_disk_key disk_key;
1762 btrfs_dir_item_key(eb, item, &disk_key);
1763 btrfs_disk_key_to_cpu(key, &disk_key);
1767 static inline u8 btrfs_key_type(struct btrfs_key *key)
1772 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1777 /* struct btrfs_header */
1778 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1779 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1781 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1782 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1783 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1784 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1785 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1786 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1788 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1789 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1792 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1794 return (btrfs_header_flags(eb) & flag) == flag;
1797 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1799 u64 flags = btrfs_header_flags(eb);
1800 btrfs_set_header_flags(eb, flags | flag);
1801 return (flags & flag) == flag;
1804 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1806 u64 flags = btrfs_header_flags(eb);
1807 btrfs_set_header_flags(eb, flags & ~flag);
1808 return (flags & flag) == flag;
1811 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1813 u64 flags = btrfs_header_flags(eb);
1814 return flags >> BTRFS_BACKREF_REV_SHIFT;
1817 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1820 u64 flags = btrfs_header_flags(eb);
1821 flags &= ~BTRFS_BACKREF_REV_MASK;
1822 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1823 btrfs_set_header_flags(eb, flags);
1826 static inline unsigned long btrfs_header_fsid(void)
1828 return offsetof(struct btrfs_header, fsid);
1831 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1833 return offsetof(struct btrfs_header, chunk_tree_uuid);
1836 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1838 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1842 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1844 unsigned long ptr = offsetof(struct btrfs_header, csum);
1848 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1853 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1858 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1863 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1865 return (btrfs_header_level(eb) == 0);
1868 /* struct btrfs_root_item */
1869 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1871 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1872 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1873 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1875 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1877 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1878 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1879 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1880 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1881 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1882 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1883 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1884 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1886 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1888 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1890 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1892 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1894 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1897 /* struct btrfs_root_backup */
1898 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1900 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1902 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1903 tree_root_level, 8);
1905 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1907 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1908 chunk_root_gen, 64);
1909 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1910 chunk_root_level, 8);
1912 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1914 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1915 extent_root_gen, 64);
1916 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1917 extent_root_level, 8);
1919 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1921 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1923 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1926 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1928 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1930 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1933 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1935 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1937 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1938 csum_root_level, 8);
1939 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1941 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1943 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1946 /* struct btrfs_super_block */
1948 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1949 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1950 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1952 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1953 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1954 struct btrfs_super_block, sys_chunk_array_size, 32);
1955 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1956 struct btrfs_super_block, chunk_root_generation, 64);
1957 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1959 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1961 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1962 chunk_root_level, 8);
1963 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1965 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1966 log_root_transid, 64);
1967 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1969 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1971 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1973 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1975 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1977 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1979 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1981 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1982 root_dir_objectid, 64);
1983 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1985 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1987 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1988 compat_ro_flags, 64);
1989 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1990 incompat_flags, 64);
1991 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1993 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1994 cache_generation, 64);
1995 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
1996 uuid_tree_generation, 64);
1997 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
1999 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2001 int t = btrfs_super_csum_type(s);
2002 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2003 return btrfs_csum_sizes[t];
2006 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2008 return offsetof(struct btrfs_leaf, items);
2011 /* struct btrfs_file_extent_item */
2012 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2013 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2015 static inline unsigned long btrfs_file_extent_inline_start(struct
2016 btrfs_file_extent_item *e)
2018 unsigned long offset = (unsigned long)e;
2019 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2023 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2025 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2028 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2030 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2032 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2034 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2036 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2037 disk_num_bytes, 64);
2038 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2040 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2042 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2044 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2046 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2048 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2050 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2052 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2054 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2056 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2057 other_encoding, 16);
2059 /* btrfs_qgroup_status_item */
2060 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2062 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2064 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2066 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2069 /* btrfs_qgroup_info_item */
2070 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2072 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2074 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2075 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2076 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2078 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2079 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2081 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2082 struct btrfs_qgroup_info_item, generation, 64);
2083 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2084 struct btrfs_qgroup_info_item, referenced, 64);
2085 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2086 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2087 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2088 struct btrfs_qgroup_info_item, exclusive, 64);
2089 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2090 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2092 /* btrfs_qgroup_limit_item */
2093 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2095 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2096 max_referenced, 64);
2097 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2099 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2100 rsv_referenced, 64);
2101 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2104 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2105 struct btrfs_qgroup_limit_item, flags, 64);
2106 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2107 struct btrfs_qgroup_limit_item, max_referenced, 64);
2108 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2109 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2110 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2111 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2112 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2113 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2116 * this returns the number of bytes used by the item on disk, minus the
2117 * size of any extent headers. If a file is compressed on disk, this is
2118 * the compressed size
2120 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2121 struct btrfs_item *e)
2123 unsigned long offset;
2124 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2125 return btrfs_item_size(eb, e) - offset;
2128 /* this returns the number of file bytes represented by the inline item.
2129 * If an item is compressed, this is the uncompressed size
2131 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2133 struct btrfs_file_extent_item *fi)
2136 * return the space used on disk if this item isn't
2137 * compressed or encoded
2139 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2140 btrfs_file_extent_encryption(eb, fi) == 0 &&
2141 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2142 return btrfs_file_extent_inline_item_len(eb,
2143 btrfs_item_nr(slot));
2146 /* otherwise use the ram bytes field */
2147 return btrfs_file_extent_ram_bytes(eb, fi);
2150 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2152 return root->leafsize;
2153 return root->nodesize;
2156 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2158 struct btrfs_super_block *disk_super;
2159 disk_super = fs_info->super_copy;
2160 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2163 /* helper function to cast into the data area of the leaf. */
2164 #define btrfs_item_ptr(leaf, slot, type) \
2165 ((type *)(btrfs_leaf_data(leaf) + \
2166 btrfs_item_offset_nr(leaf, slot)))
2168 #define btrfs_item_ptr_offset(leaf, slot) \
2169 ((unsigned long)(btrfs_leaf_data(leaf) + \
2170 btrfs_item_offset_nr(leaf, slot)))
2173 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root,
2175 u64 num_bytes, u64 empty_size,
2176 u64 hint_byte, u64 search_end,
2177 struct btrfs_key *ins, int data);
2178 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2179 struct btrfs_root *root);
2180 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2181 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2182 u64 bytenr, u64 num_bytes);
2183 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2184 struct btrfs_root *root);
2185 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2186 btrfs_fs_info *info,
2188 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2189 btrfs_fs_info *info,
2191 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2192 struct btrfs_root *root,
2193 u32 blocksize, u64 root_objectid,
2194 struct btrfs_disk_key *key, int level,
2195 u64 hint, u64 empty_size);
2196 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *root,
2198 u64 num_bytes, u64 parent,
2199 u64 root_objectid, u64 ref_generation,
2200 u64 owner, u64 empty_size, u64 hint_byte,
2201 u64 search_end, struct btrfs_key *ins, int data);
2202 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2203 struct btrfs_root *root, u64 bytenr,
2204 u64 offset, int metadata, u64 *refs, u64 *flags);
2205 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2206 struct btrfs_root *root,
2207 u64 bytenr, int level, u64 flags);
2208 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2209 struct extent_buffer *buf, int record_parent);
2210 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2211 struct extent_buffer *buf, int record_parent);
2212 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2213 struct btrfs_root *root,
2214 u64 bytenr, u64 num_bytes, u64 parent,
2215 u64 root_objectid, u64 owner, u64 offset);
2216 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2217 struct btrfs_root *root,
2218 struct extent_io_tree *unpin);
2219 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2220 struct btrfs_root *root,
2221 u64 bytenr, u64 num_bytes, u64 parent,
2222 u64 root_objectid, u64 ref_generation,
2223 u64 owner_objectid);
2224 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2225 struct btrfs_root *root, u64 bytenr,
2226 u64 orig_parent, u64 parent,
2227 u64 root_objectid, u64 ref_generation,
2228 u64 owner_objectid);
2229 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2230 struct btrfs_root *root);
2231 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2232 int btrfs_read_block_groups(struct btrfs_root *root);
2233 struct btrfs_block_group_cache *
2234 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2235 u64 chunk_objectid, u64 chunk_offset, u64 size);
2236 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root, u64 bytes_used,
2238 u64 type, u64 chunk_objectid, u64 chunk_offset,
2240 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2241 struct btrfs_root *root);
2242 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2243 struct btrfs_root *root, u64 bytenr, u64 num,
2244 int alloc, int mark_free);
2245 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2246 struct btrfs_root *root, u64 objectid,
2247 struct btrfs_inode_item *inode,
2248 u64 file_pos, u64 disk_bytenr,
2251 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2252 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2253 struct btrfs_path *path, int level, int slot);
2254 enum btrfs_tree_block_status
2255 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2256 struct extent_buffer *buf);
2257 enum btrfs_tree_block_status
2258 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2259 struct extent_buffer *buf);
2260 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2261 int level, int slot, u64 objectid);
2262 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2263 struct extent_buffer *parent, int slot);
2264 int btrfs_previous_item(struct btrfs_root *root,
2265 struct btrfs_path *path, u64 min_objectid,
2267 int btrfs_previous_extent_item(struct btrfs_root *root,
2268 struct btrfs_path *path, u64 min_objectid);
2269 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2270 struct btrfs_root *root, struct extent_buffer *buf,
2271 struct extent_buffer *parent, int parent_slot,
2272 struct extent_buffer **cow_ret);
2273 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root,
2275 struct extent_buffer *buf,
2276 struct extent_buffer *parent, int parent_slot,
2277 struct extent_buffer **cow_ret,
2278 u64 search_start, u64 empty_size);
2279 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2280 struct btrfs_root *root,
2281 struct extent_buffer *buf,
2282 struct extent_buffer **cow_ret, u64 new_root_objectid);
2283 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2284 *root, struct btrfs_path *path, u32 data_size);
2285 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2286 struct btrfs_root *root,
2287 struct btrfs_path *path,
2288 u32 new_size, int from_end);
2289 int btrfs_split_item(struct btrfs_trans_handle *trans,
2290 struct btrfs_root *root,
2291 struct btrfs_path *path,
2292 struct btrfs_key *new_key,
2293 unsigned long split_offset);
2294 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2295 *root, struct btrfs_key *key, struct btrfs_path *p, int
2297 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2298 u64 iobjectid, u64 ioff, u8 key_type,
2299 struct btrfs_key *found_key);
2300 void btrfs_release_path(struct btrfs_path *p);
2301 void add_root_to_dirty_list(struct btrfs_root *root);
2302 struct btrfs_path *btrfs_alloc_path(void);
2303 void btrfs_free_path(struct btrfs_path *p);
2304 void btrfs_init_path(struct btrfs_path *p);
2305 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2306 struct btrfs_path *path, int slot, int nr);
2308 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 struct btrfs_path *path)
2312 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2315 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2316 *root, struct btrfs_key *key, void *data, u32 data_size);
2317 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2318 struct btrfs_root *root,
2319 struct btrfs_path *path,
2320 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2322 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root,
2324 struct btrfs_path *path,
2325 struct btrfs_key *key,
2328 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2331 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2332 static inline int btrfs_next_item(struct btrfs_root *root,
2333 struct btrfs_path *p)
2336 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2337 return btrfs_next_leaf(root, p);
2341 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2342 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2343 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2344 struct btrfs_disk_key *key, int level);
2345 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2346 struct btrfs_key *new_key);
2347 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2348 struct btrfs_path *path,
2349 struct btrfs_key *new_key);
2352 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2353 struct btrfs_root *tree_root,
2354 u64 root_id, u8 type, u64 ref_id,
2355 u64 dirid, u64 sequence,
2356 const char *name, int name_len);
2357 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2358 *root, struct btrfs_key *key, struct btrfs_root_item
2360 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2361 *root, struct btrfs_key *key, struct btrfs_root_item
2363 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2364 btrfs_root_item *item, struct btrfs_key *key);
2366 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2367 *root, const char *name, int name_len, u64 dir,
2368 struct btrfs_key *location, u8 type, u64 index);
2369 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2370 struct btrfs_root *root,
2371 struct btrfs_path *path, u64 dir,
2372 const char *name, int name_len,
2374 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2375 struct btrfs_root *root,
2376 struct btrfs_path *path, u64 dir,
2377 const char *name, int name_len,
2378 u64 index, int mod);
2379 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2380 struct btrfs_root *root,
2381 struct btrfs_path *path,
2382 struct btrfs_dir_item *di);
2383 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2384 struct btrfs_root *root, const char *name,
2385 u16 name_len, const void *data, u16 data_len,
2388 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2389 struct btrfs_root *fs_root,
2390 u64 dirid, u64 *objectid);
2393 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2394 struct btrfs_root *root,
2395 const char *name, int name_len,
2396 u64 inode_objectid, u64 ref_objectid, u64 index);
2397 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2398 *root, u64 objectid, struct btrfs_inode_item
2400 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2401 *root, struct btrfs_path *path,
2402 struct btrfs_key *location, int mod);
2403 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2404 *trans, struct btrfs_path *path, struct btrfs_root *root,
2405 u64 ino, u64 parent_ino, u64 index, const char *name,
2406 int namelen, int ins_len);
2407 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2408 struct btrfs_root *root,
2409 const char *name, int name_len,
2410 u64 inode_objectid, u64 ref_objectid,
2412 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 const char *name, int name_len,
2415 u64 inode_objectid, u64 ref_objectid, u64 index);
2416 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root, struct btrfs_path *path,
2418 const char *name, int namelen, u64 ino, u64 parent_ino,
2419 u64 index, int ins_len);
2420 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root, const char *name, int name_len,
2422 u64 ino, u64 parent_ino, u64 *index);
2425 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2426 struct btrfs_root *root, u64 bytenr, u64 len);
2427 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2428 struct btrfs_root *root,
2429 u64 objectid, u64 pos, u64 offset,
2432 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2433 struct btrfs_root *root, u64 objectid,
2434 u64 offset, char *buffer, size_t size);
2435 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2436 struct btrfs_root *root, u64 alloc_end,
2437 u64 bytenr, char *data, size_t len);
2438 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2439 struct btrfs_root *root, struct btrfs_path *path,
2443 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2444 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2447 static inline int is_fstree(u64 rootid)
2449 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2450 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2456 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2457 u64 dir, u64 index);
2458 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2460 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2461 u64 ino, u64 parent_ino, char *name, int namelen,
2462 u8 type, u64 *index, int add_backref);
2463 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2464 u64 ino, u64 parent_ino, u64 index, const char *name,
2465 int namelen, int add_orphan);
2466 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2467 struct btrfs_root *root, struct btrfs_path *path,
2469 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2470 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2473 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2474 struct btrfs_root *root,
2475 struct btrfs_path *path,
2476 u64 ino, u64 offset, u64 len, int ins_len);
2477 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2478 struct btrfs_root *root,
2479 u64 ino, u64 offset, u64 len);