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)
312 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
314 #define BTRFS_BACKREF_REV_MAX 256
315 #define BTRFS_BACKREF_REV_SHIFT 56
316 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
317 BTRFS_BACKREF_REV_SHIFT)
319 #define BTRFS_OLD_BACKREF_REV 0
320 #define BTRFS_MIXED_BACKREF_REV 1
323 * every tree block (leaf or node) starts with this header.
325 struct btrfs_header {
326 /* these first four must match the super block */
327 u8 csum[BTRFS_CSUM_SIZE];
328 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
329 __le64 bytenr; /* which block this node is supposed to live in */
332 /* allowed to be different from the super from here on down */
333 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
338 } __attribute__ ((__packed__));
340 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
341 sizeof(struct btrfs_header)) / \
342 sizeof(struct btrfs_key_ptr))
343 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
344 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
345 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
346 sizeof(struct btrfs_item) - \
347 sizeof(struct btrfs_file_extent_item))
348 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) -\
350 sizeof(struct btrfs_dir_item))
354 * this is a very generous portion of the super block, giving us
355 * room to translate 14 chunks with 3 stripes each.
357 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
358 #define BTRFS_LABEL_SIZE 256
361 * just in case we somehow lose the roots and are not able to mount,
362 * we store an array of the roots from previous transactions
365 #define BTRFS_NUM_BACKUP_ROOTS 4
366 struct btrfs_root_backup {
368 __le64 tree_root_gen;
371 __le64 chunk_root_gen;
374 __le64 extent_root_gen;
383 __le64 csum_root_gen;
393 u8 extent_root_level;
397 /* future and to align */
399 } __attribute__ ((__packed__));
402 * the super block basically lists the main trees of the FS
403 * it currently lacks any block count etc etc
405 struct btrfs_super_block {
406 u8 csum[BTRFS_CSUM_SIZE];
407 /* the first 3 fields must match struct btrfs_header */
408 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
409 __le64 bytenr; /* this block number */
412 /* allowed to be different from the btrfs_header from here own down */
419 /* this will help find the new super based on the log root */
420 __le64 log_root_transid;
423 __le64 root_dir_objectid;
429 __le32 sys_chunk_array_size;
430 __le64 chunk_root_generation;
432 __le64 compat_ro_flags;
433 __le64 incompat_flags;
438 struct btrfs_dev_item dev_item;
440 char label[BTRFS_LABEL_SIZE];
442 __le64 cache_generation;
443 __le64 uuid_tree_generation;
445 /* future expansion */
447 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
448 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
449 } __attribute__ ((__packed__));
452 * Compat flags that we support. If any incompat flags are set other than the
453 * ones specified below then we will fail to mount
455 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
456 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
457 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
458 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
461 * some patches floated around with a second compression method
462 * lets save that incompat here for when they do get in
463 * Note we don't actually support it, we're just reserving the
466 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
469 * older kernels tried to do bigger metadata blocks, but the
470 * code was pretty buggy. Lets not let them try anymore.
472 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
473 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
474 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
475 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
476 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
479 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
480 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
481 #define BTRFS_FEATURE_INCOMPAT_SUPP \
482 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
483 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
484 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
485 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
486 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
487 BTRFS_FEATURE_INCOMPAT_RAID56 | \
488 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
489 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
490 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
493 * A leaf is full of items. offset and size tell us where to find
494 * the item in the leaf (relative to the start of the data area)
497 struct btrfs_disk_key key;
500 } __attribute__ ((__packed__));
503 * leaves have an item area and a data area:
504 * [item0, item1....itemN] [free space] [dataN...data1, data0]
506 * The data is separate from the items to get the keys closer together
510 struct btrfs_header header;
511 struct btrfs_item items[];
512 } __attribute__ ((__packed__));
515 * all non-leaf blocks are nodes, they hold only keys and pointers to
518 struct btrfs_key_ptr {
519 struct btrfs_disk_key key;
522 } __attribute__ ((__packed__));
525 struct btrfs_header header;
526 struct btrfs_key_ptr ptrs[];
527 } __attribute__ ((__packed__));
530 * btrfs_paths remember the path taken from the root down to the leaf.
531 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
532 * to any other levels that are present.
534 * The slots array records the index of the item or block pointer
535 * used while walking the tree.
539 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
540 int slots[BTRFS_MAX_LEVEL];
541 /* if there is real range locking, this locks field will change */
542 int locks[BTRFS_MAX_LEVEL];
544 /* keep some upper locks as we walk down */
548 * set by btrfs_split_item, tells search_slot to keep all locks
549 * and to force calls to keep space in the nodes
551 unsigned int search_for_split:1;
552 unsigned int skip_check_block:1;
556 * items in the extent btree are used to record the objectid of the
557 * owner of the block and the number of references
560 struct btrfs_extent_item {
564 } __attribute__ ((__packed__));
566 struct btrfs_extent_item_v0 {
568 } __attribute__ ((__packed__));
570 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
571 sizeof(struct btrfs_item))
573 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
574 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
576 /* following flags only apply to tree blocks */
578 /* use full backrefs for extent pointers in the block*/
579 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
581 struct btrfs_tree_block_info {
582 struct btrfs_disk_key key;
584 } __attribute__ ((__packed__));
586 struct btrfs_extent_data_ref {
591 } __attribute__ ((__packed__));
593 struct btrfs_shared_data_ref {
595 } __attribute__ ((__packed__));
597 struct btrfs_extent_inline_ref {
600 } __attribute__ ((__packed__));
602 struct btrfs_extent_ref_v0 {
607 } __attribute__ ((__packed__));
609 /* dev extents record free space on individual devices. The owner
610 * field points back to the chunk allocation mapping tree that allocated
611 * the extent. The chunk tree uuid field is a way to double check the owner
613 struct btrfs_dev_extent {
615 __le64 chunk_objectid;
618 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
619 } __attribute__ ((__packed__));
621 struct btrfs_inode_ref {
625 } __attribute__ ((__packed__));
627 struct btrfs_inode_extref {
628 __le64 parent_objectid;
631 __u8 name[0]; /* name goes here */
632 } __attribute__ ((__packed__));
634 struct btrfs_timespec {
637 } __attribute__ ((__packed__));
640 BTRFS_COMPRESS_NONE = 0,
641 BTRFS_COMPRESS_ZLIB = 1,
642 BTRFS_COMPRESS_LZO = 2,
643 BTRFS_COMPRESS_TYPES = 2,
644 BTRFS_COMPRESS_LAST = 3,
645 } btrfs_compression_type;
647 /* we don't understand any encryption methods right now */
649 BTRFS_ENCRYPTION_NONE = 0,
650 BTRFS_ENCRYPTION_LAST = 1,
651 } btrfs_encryption_type;
653 enum btrfs_tree_block_status {
654 BTRFS_TREE_BLOCK_CLEAN,
655 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
656 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
657 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
658 BTRFS_TREE_BLOCK_INVALID_LEVEL,
659 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
660 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
663 struct btrfs_inode_item {
664 /* nfs style generation number */
666 /* transid that last touched this inode */
678 /* modification sequence number for NFS */
682 * a little future expansion, for more than this we can
683 * just grow the inode item and version it
686 struct btrfs_timespec atime;
687 struct btrfs_timespec ctime;
688 struct btrfs_timespec mtime;
689 struct btrfs_timespec otime;
690 } __attribute__ ((__packed__));
692 struct btrfs_dir_log_item {
694 } __attribute__ ((__packed__));
696 struct btrfs_dir_item {
697 struct btrfs_disk_key location;
702 } __attribute__ ((__packed__));
704 struct btrfs_root_item_v0 {
705 struct btrfs_inode_item inode;
711 __le64 last_snapshot;
714 struct btrfs_disk_key drop_progress;
717 } __attribute__ ((__packed__));
719 struct btrfs_root_item {
720 struct btrfs_inode_item inode;
726 __le64 last_snapshot;
729 struct btrfs_disk_key drop_progress;
734 * The following fields appear after subvol_uuids+subvol_times
739 * This generation number is used to test if the new fields are valid
740 * and up to date while reading the root item. Everytime the root item
741 * is written out, the "generation" field is copied into this field. If
742 * anyone ever mounted the fs with an older kernel, we will have
743 * mismatching generation values here and thus must invalidate the
744 * new fields. See btrfs_update_root and btrfs_find_last_root for
746 * the offset of generation_v2 is also used as the start for the memset
747 * when invalidating the fields.
749 __le64 generation_v2;
750 u8 uuid[BTRFS_UUID_SIZE];
751 u8 parent_uuid[BTRFS_UUID_SIZE];
752 u8 received_uuid[BTRFS_UUID_SIZE];
753 __le64 ctransid; /* updated when an inode changes */
754 __le64 otransid; /* trans when created */
755 __le64 stransid; /* trans when sent. non-zero for received subvol */
756 __le64 rtransid; /* trans when received. non-zero for received subvol */
757 struct btrfs_timespec ctime;
758 struct btrfs_timespec otime;
759 struct btrfs_timespec stime;
760 struct btrfs_timespec rtime;
761 __le64 reserved[8]; /* for future */
762 } __attribute__ ((__packed__));
765 * this is used for both forward and backward root refs
767 struct btrfs_root_ref {
771 } __attribute__ ((__packed__));
773 #define BTRFS_FILE_EXTENT_INLINE 0
774 #define BTRFS_FILE_EXTENT_REG 1
775 #define BTRFS_FILE_EXTENT_PREALLOC 2
777 struct btrfs_file_extent_item {
779 * transaction id that created this extent
783 * max number of bytes to hold this extent in ram
784 * when we split a compressed extent we can't know how big
785 * each of the resulting pieces will be. So, this is
786 * an upper limit on the size of the extent in ram instead of
792 * 32 bits for the various ways we might encode the data,
793 * including compression and encryption. If any of these
794 * are set to something a given disk format doesn't understand
795 * it is treated like an incompat flag for reading and writing,
800 __le16 other_encoding; /* spare for later use */
802 /* are we inline data or a real extent? */
806 * disk space consumed by the extent, checksum blocks are included
810 __le64 disk_num_bytes;
812 * the logical offset in file blocks (no csums)
813 * this extent record is for. This allows a file extent to point
814 * into the middle of an existing extent on disk, sharing it
815 * between two snapshots (useful if some bytes in the middle of the
816 * extent have changed
820 * the logical number of file blocks (no csums included)
824 } __attribute__ ((__packed__));
826 struct btrfs_csum_item {
828 } __attribute__ ((__packed__));
831 * We don't want to overwrite 1M at the beginning of device, even though
832 * there is our 1st superblock at 64k. Some possible reasons:
833 * - the first 64k blank is useful for some boot loader/manager
834 * - the first 1M could be scratched by buggy partitioner or somesuch
836 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
838 /* tag for the radix tree of block groups in ram */
839 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
840 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
841 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
842 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
843 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
844 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
845 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
846 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
847 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
848 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
849 #define BTRFS_NR_RAID_TYPES 7
851 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
852 BTRFS_BLOCK_GROUP_SYSTEM | \
853 BTRFS_BLOCK_GROUP_METADATA)
855 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
856 BTRFS_BLOCK_GROUP_RAID1 | \
857 BTRFS_BLOCK_GROUP_RAID5 | \
858 BTRFS_BLOCK_GROUP_RAID6 | \
859 BTRFS_BLOCK_GROUP_DUP | \
860 BTRFS_BLOCK_GROUP_RAID10)
862 /* used in struct btrfs_balance_args fields */
863 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
866 * GLOBAL_RSV does not exist as a on-disk block group type and is used
867 * internally for exporting info about global block reserve from space infos
869 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
871 #define BTRFS_QGROUP_STATUS_OFF 0
872 #define BTRFS_QGROUP_STATUS_ON 1
873 #define BTRFS_QGROUP_STATUS_SCANNING 2
875 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
877 struct btrfs_qgroup_status_item {
881 __le64 scan; /* progress during scanning */
882 } __attribute__ ((__packed__));
884 struct btrfs_block_group_item {
886 __le64 chunk_objectid;
888 } __attribute__ ((__packed__));
890 struct btrfs_qgroup_info_item {
893 __le64 referenced_compressed;
895 __le64 exclusive_compressed;
896 } __attribute__ ((__packed__));
898 /* flags definition for qgroup limits */
899 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
900 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
901 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
902 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
903 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
904 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
906 struct btrfs_qgroup_limit_item {
908 __le64 max_referenced;
909 __le64 max_exclusive;
910 __le64 rsv_referenced;
911 __le64 rsv_exclusive;
912 } __attribute__ ((__packed__));
914 struct btrfs_space_info {
920 struct list_head list;
923 struct btrfs_block_group_cache {
924 struct cache_extent cache;
925 struct btrfs_key key;
926 struct btrfs_block_group_item item;
927 struct btrfs_space_info *space_info;
928 struct btrfs_free_space_ctl *free_space_ctl;
935 struct btrfs_extent_ops {
936 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
937 u64 hint_byte, struct btrfs_key *ins);
938 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
943 struct btrfs_fs_devices;
944 struct btrfs_fs_info {
945 u8 fsid[BTRFS_FSID_SIZE];
946 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
947 struct btrfs_root *fs_root;
948 struct btrfs_root *extent_root;
949 struct btrfs_root *tree_root;
950 struct btrfs_root *chunk_root;
951 struct btrfs_root *dev_root;
952 struct btrfs_root *csum_root;
953 struct btrfs_root *quota_root;
955 struct rb_root fs_root_tree;
957 /* the log root tree is a directory of all the other log roots */
958 struct btrfs_root *log_root_tree;
960 struct extent_io_tree extent_cache;
961 struct extent_io_tree free_space_cache;
962 struct extent_io_tree block_group_cache;
963 struct extent_io_tree pinned_extents;
964 struct extent_io_tree pending_del;
965 struct extent_io_tree extent_ins;
966 struct extent_io_tree *excluded_extents;
968 /* logical->physical extent mapping */
969 struct btrfs_mapping_tree mapping_tree;
972 u64 last_trans_committed;
974 u64 avail_data_alloc_bits;
975 u64 avail_metadata_alloc_bits;
976 u64 avail_system_alloc_bits;
977 u64 data_alloc_profile;
978 u64 metadata_alloc_profile;
979 u64 system_alloc_profile;
982 struct btrfs_trans_handle *running_transaction;
983 struct btrfs_super_block *super_copy;
984 struct mutex fs_mutex;
989 struct btrfs_extent_ops *extent_ops;
990 struct list_head dirty_cowonly_roots;
991 struct list_head recow_ebs;
993 struct btrfs_fs_devices *fs_devices;
994 struct list_head space_info;
997 unsigned int readonly:1;
998 unsigned int on_restoring:1;
999 unsigned int is_chunk_recover:1;
1000 unsigned int quota_enabled:1;
1001 unsigned int suppress_check_block_errors:1;
1003 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1004 struct btrfs_root *root,
1005 u64 bytenr, u64 num_bytes, u64 parent,
1006 u64 root_objectid, u64 owner, u64 offset,
1008 struct cache_tree *fsck_extent_cache;
1009 struct cache_tree *corrupt_blocks;
1014 * in ram representation of the tree. extent_root is used for all allocations
1015 * and for the extent tree extent_root root.
1018 struct extent_buffer *node;
1019 struct extent_buffer *commit_root;
1020 struct btrfs_root_item root_item;
1021 struct btrfs_key root_key;
1022 struct btrfs_fs_info *fs_info;
1026 /* data allocations are done in sectorsize units */
1029 /* node allocations are done in nodesize units */
1032 /* leaf allocations are done in leafsize units */
1035 /* leaf allocations are done in leafsize units */
1044 u64 last_inode_alloc;
1047 * Record orphan data extent ref
1049 * TODO: Don't restore things in btrfs_root.
1050 * Directly record it into inode_record, which needs a lot of
1051 * infrastructure change to allow cooperation between extent
1054 struct list_head orphan_data_extents;
1056 /* the dirty list is only used by non-reference counted roots */
1057 struct list_head dirty_list;
1058 struct rb_node rb_node;
1062 * inode items have the data typically returned from stat and store other
1063 * info about object characteristics. There is one for every file and dir in
1066 #define BTRFS_INODE_ITEM_KEY 1
1067 #define BTRFS_INODE_REF_KEY 12
1068 #define BTRFS_INODE_EXTREF_KEY 13
1069 #define BTRFS_XATTR_ITEM_KEY 24
1070 #define BTRFS_ORPHAN_ITEM_KEY 48
1072 #define BTRFS_DIR_LOG_ITEM_KEY 60
1073 #define BTRFS_DIR_LOG_INDEX_KEY 72
1075 * dir items are the name -> inode pointers in a directory. There is one
1076 * for every name in a directory.
1078 #define BTRFS_DIR_ITEM_KEY 84
1079 #define BTRFS_DIR_INDEX_KEY 96
1082 * extent data is for file data
1084 #define BTRFS_EXTENT_DATA_KEY 108
1087 * csum items have the checksums for data in the extents
1089 #define BTRFS_CSUM_ITEM_KEY 120
1091 * extent csums are stored in a separate tree and hold csums for
1092 * an entire extent on disk.
1094 #define BTRFS_EXTENT_CSUM_KEY 128
1097 * root items point to tree roots. There are typically in the root
1098 * tree used by the super block to find all the other trees
1100 #define BTRFS_ROOT_ITEM_KEY 132
1103 * root backrefs tie subvols and snapshots to the directory entries that
1106 #define BTRFS_ROOT_BACKREF_KEY 144
1109 * root refs make a fast index for listing all of the snapshots and
1110 * subvolumes referenced by a given root. They point directly to the
1111 * directory item in the root that references the subvol
1113 #define BTRFS_ROOT_REF_KEY 156
1116 * extent items are in the extent map tree. These record which blocks
1117 * are used, and how many references there are to each block
1119 #define BTRFS_EXTENT_ITEM_KEY 168
1122 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1123 * the length, so we save the level in key->offset instead of the length.
1125 #define BTRFS_METADATA_ITEM_KEY 169
1127 #define BTRFS_TREE_BLOCK_REF_KEY 176
1129 #define BTRFS_EXTENT_DATA_REF_KEY 178
1131 /* old style extent backrefs */
1132 #define BTRFS_EXTENT_REF_V0_KEY 180
1134 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1136 #define BTRFS_SHARED_DATA_REF_KEY 184
1140 * block groups give us hints into the extent allocation trees. Which
1141 * blocks are free etc etc
1143 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1145 #define BTRFS_DEV_EXTENT_KEY 204
1146 #define BTRFS_DEV_ITEM_KEY 216
1147 #define BTRFS_CHUNK_ITEM_KEY 228
1149 #define BTRFS_BALANCE_ITEM_KEY 248
1154 #define BTRFS_QGROUP_STATUS_KEY 240
1155 #define BTRFS_QGROUP_INFO_KEY 242
1156 #define BTRFS_QGROUP_LIMIT_KEY 244
1157 #define BTRFS_QGROUP_RELATION_KEY 246
1160 * Persistently stores the io stats in the device tree.
1161 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1163 #define BTRFS_DEV_STATS_KEY 249
1166 * Persistently stores the device replace state in the device tree.
1167 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1169 #define BTRFS_DEV_REPLACE_KEY 250
1172 * Stores items that allow to quickly map UUIDs to something else.
1173 * These items are part of the filesystem UUID tree.
1174 * The key is built like this:
1175 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1177 #if BTRFS_UUID_SIZE != 16
1178 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1180 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1181 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1182 * received subvols */
1185 * string items are for debugging. They just store a short string of
1188 #define BTRFS_STRING_ITEM_KEY 253
1192 #define BTRFS_INODE_NODATASUM (1 << 0)
1193 #define BTRFS_INODE_NODATACOW (1 << 1)
1194 #define BTRFS_INODE_READONLY (1 << 2)
1196 #define read_eb_member(eb, ptr, type, member, result) ( \
1197 read_extent_buffer(eb, (char *)(result), \
1198 ((unsigned long)(ptr)) + \
1199 offsetof(type, member), \
1200 sizeof(((type *)0)->member)))
1202 #define write_eb_member(eb, ptr, type, member, result) ( \
1203 write_extent_buffer(eb, (char *)(result), \
1204 ((unsigned long)(ptr)) + \
1205 offsetof(type, member), \
1206 sizeof(((type *)0)->member)))
1208 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1209 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1211 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1212 return le##bits##_to_cpu(h->member); \
1214 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1217 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1218 h->member = cpu_to_le##bits(val); \
1221 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1222 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1225 unsigned long offset = (unsigned long)s; \
1226 const type *p = (type *) (eb->data + offset); \
1227 return get_unaligned_le##bits(&p->member); \
1229 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1230 type *s, u##bits val) \
1232 unsigned long offset = (unsigned long)s; \
1233 type *p = (type *) (eb->data + offset); \
1234 put_unaligned_le##bits(val, &p->member); \
1237 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1238 static inline u##bits btrfs_##name(const type *s) \
1240 return le##bits##_to_cpu(s->member); \
1242 static inline void btrfs_set_##name(type *s, u##bits val) \
1244 s->member = cpu_to_le##bits(val); \
1247 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1248 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1249 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1250 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1251 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1252 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1254 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1255 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1256 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1257 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1258 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1259 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1261 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1262 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1264 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1266 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1268 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1270 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1272 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1273 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1275 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1277 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1279 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1282 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1284 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1287 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1289 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1292 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1293 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1294 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1295 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1296 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1297 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1298 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1299 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1300 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1301 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1302 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1304 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1306 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1309 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1310 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1311 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1313 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1315 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1317 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1319 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1320 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1322 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1324 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1325 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1327 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1330 unsigned long offset = (unsigned long)c;
1331 offset += offsetof(struct btrfs_chunk, stripe);
1332 offset += nr * sizeof(struct btrfs_stripe);
1333 return (struct btrfs_stripe *)offset;
1336 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1338 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1341 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1342 struct btrfs_chunk *c, int nr)
1344 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1347 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1348 struct btrfs_chunk *c, int nr,
1351 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1354 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1355 struct btrfs_chunk *c, int nr)
1357 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1360 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1361 struct btrfs_chunk *c, int nr,
1364 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1367 /* struct btrfs_block_group_item */
1368 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1370 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1372 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1373 struct btrfs_block_group_item, chunk_objectid, 64);
1375 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1376 struct btrfs_block_group_item, chunk_objectid, 64);
1377 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1378 struct btrfs_block_group_item, flags, 64);
1379 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1380 struct btrfs_block_group_item, flags, 64);
1382 /* struct btrfs_inode_ref */
1383 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1384 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1385 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1387 /* struct btrfs_inode_extref */
1388 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1389 parent_objectid, 64);
1390 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1392 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1394 /* struct btrfs_inode_item */
1395 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1396 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1397 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1398 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1399 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1400 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1401 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1402 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1403 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1404 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1405 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1406 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1408 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1409 struct btrfs_inode_item, generation, 64);
1410 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1411 struct btrfs_inode_item, generation, 64);
1412 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1413 struct btrfs_inode_item, size, 64);
1414 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1415 struct btrfs_inode_item, nbytes, 64);
1416 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1417 struct btrfs_inode_item, block_group, 64);
1418 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1419 struct btrfs_inode_item, nlink, 32);
1420 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1421 struct btrfs_inode_item, uid, 32);
1422 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1423 struct btrfs_inode_item, gid, 32);
1424 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1425 struct btrfs_inode_item, mode, 32);
1426 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1427 struct btrfs_inode_item, rdev, 64);
1428 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1429 struct btrfs_inode_item, flags, 64);
1431 static inline struct btrfs_timespec *
1432 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1434 unsigned long ptr = (unsigned long)inode_item;
1435 ptr += offsetof(struct btrfs_inode_item, atime);
1436 return (struct btrfs_timespec *)ptr;
1439 static inline struct btrfs_timespec *
1440 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1442 unsigned long ptr = (unsigned long)inode_item;
1443 ptr += offsetof(struct btrfs_inode_item, mtime);
1444 return (struct btrfs_timespec *)ptr;
1447 static inline struct btrfs_timespec *
1448 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1450 unsigned long ptr = (unsigned long)inode_item;
1451 ptr += offsetof(struct btrfs_inode_item, ctime);
1452 return (struct btrfs_timespec *)ptr;
1455 static inline struct btrfs_timespec *
1456 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1458 unsigned long ptr = (unsigned long)inode_item;
1459 ptr += offsetof(struct btrfs_inode_item, otime);
1460 return (struct btrfs_timespec *)ptr;
1463 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1464 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1465 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1467 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1470 /* struct btrfs_dev_extent */
1471 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1473 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1474 chunk_objectid, 64);
1475 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1477 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1479 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1481 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1482 return (u8 *)((unsigned long)dev + ptr);
1486 /* struct btrfs_extent_item */
1487 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1488 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1489 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1491 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1492 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1494 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1496 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1498 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1499 struct btrfs_tree_block_info *item,
1500 struct btrfs_disk_key *key)
1502 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1505 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1506 struct btrfs_tree_block_info *item,
1507 struct btrfs_disk_key *key)
1509 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1512 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1514 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1516 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1518 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1521 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1524 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1526 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1528 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1529 struct btrfs_extent_inline_ref, type, 8);
1530 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1531 struct btrfs_extent_inline_ref, offset, 64);
1533 static inline u32 btrfs_extent_inline_ref_size(int type)
1535 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1536 type == BTRFS_SHARED_BLOCK_REF_KEY)
1537 return sizeof(struct btrfs_extent_inline_ref);
1538 if (type == BTRFS_SHARED_DATA_REF_KEY)
1539 return sizeof(struct btrfs_shared_data_ref) +
1540 sizeof(struct btrfs_extent_inline_ref);
1541 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1542 return sizeof(struct btrfs_extent_data_ref) +
1543 offsetof(struct btrfs_extent_inline_ref, offset);
1548 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1549 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1551 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1552 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1554 /* struct btrfs_node */
1555 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1556 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1558 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1561 ptr = offsetof(struct btrfs_node, ptrs) +
1562 sizeof(struct btrfs_key_ptr) * nr;
1563 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1566 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1570 ptr = offsetof(struct btrfs_node, ptrs) +
1571 sizeof(struct btrfs_key_ptr) * nr;
1572 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1575 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1578 ptr = offsetof(struct btrfs_node, ptrs) +
1579 sizeof(struct btrfs_key_ptr) * nr;
1580 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1583 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1587 ptr = offsetof(struct btrfs_node, ptrs) +
1588 sizeof(struct btrfs_key_ptr) * nr;
1589 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1592 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1594 return offsetof(struct btrfs_node, ptrs) +
1595 sizeof(struct btrfs_key_ptr) * nr;
1598 static inline void btrfs_node_key(struct extent_buffer *eb,
1599 struct btrfs_disk_key *disk_key, int nr)
1602 ptr = btrfs_node_key_ptr_offset(nr);
1603 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1604 struct btrfs_key_ptr, key, disk_key);
1607 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1608 struct btrfs_disk_key *disk_key, int nr)
1611 ptr = btrfs_node_key_ptr_offset(nr);
1612 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1613 struct btrfs_key_ptr, key, disk_key);
1616 /* struct btrfs_item */
1617 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1618 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1620 static inline unsigned long btrfs_item_nr_offset(int nr)
1622 return offsetof(struct btrfs_leaf, items) +
1623 sizeof(struct btrfs_item) * nr;
1626 static inline struct btrfs_item *btrfs_item_nr(int nr)
1628 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1631 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1632 struct btrfs_item *item)
1634 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1637 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1639 return btrfs_item_end(eb, btrfs_item_nr(nr));
1642 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1644 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1647 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1649 return btrfs_item_size(eb, btrfs_item_nr(nr));
1652 static inline void btrfs_item_key(struct extent_buffer *eb,
1653 struct btrfs_disk_key *disk_key, int nr)
1655 struct btrfs_item *item = btrfs_item_nr(nr);
1656 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1659 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1660 struct btrfs_disk_key *disk_key, int nr)
1662 struct btrfs_item *item = btrfs_item_nr(nr);
1663 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1666 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1669 * struct btrfs_root_ref
1671 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1672 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1673 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1675 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1676 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1677 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1679 /* struct btrfs_dir_item */
1680 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1681 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1682 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1683 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1685 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1687 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1688 struct btrfs_dir_item *item,
1689 struct btrfs_disk_key *key)
1691 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1694 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1695 struct btrfs_dir_item *item,
1696 struct btrfs_disk_key *key)
1698 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1701 /* struct btrfs_free_space_header */
1702 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1704 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1706 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1709 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1710 struct btrfs_free_space_header *h,
1711 struct btrfs_disk_key *key)
1713 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1716 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1717 struct btrfs_free_space_header *h,
1718 struct btrfs_disk_key *key)
1720 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1723 /* struct btrfs_disk_key */
1724 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1726 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1727 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1729 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1730 struct btrfs_disk_key *disk)
1732 cpu->offset = le64_to_cpu(disk->offset);
1733 cpu->type = disk->type;
1734 cpu->objectid = le64_to_cpu(disk->objectid);
1737 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1738 struct btrfs_key *cpu)
1740 disk->offset = cpu_to_le64(cpu->offset);
1741 disk->type = cpu->type;
1742 disk->objectid = cpu_to_le64(cpu->objectid);
1745 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1746 struct btrfs_key *key, int nr)
1748 struct btrfs_disk_key disk_key;
1749 btrfs_node_key(eb, &disk_key, nr);
1750 btrfs_disk_key_to_cpu(key, &disk_key);
1753 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1754 struct btrfs_key *key, int nr)
1756 struct btrfs_disk_key disk_key;
1757 btrfs_item_key(eb, &disk_key, nr);
1758 btrfs_disk_key_to_cpu(key, &disk_key);
1761 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1762 struct btrfs_dir_item *item,
1763 struct btrfs_key *key)
1765 struct btrfs_disk_key disk_key;
1766 btrfs_dir_item_key(eb, item, &disk_key);
1767 btrfs_disk_key_to_cpu(key, &disk_key);
1771 static inline u8 btrfs_key_type(struct btrfs_key *key)
1776 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1781 /* struct btrfs_header */
1782 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1783 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1785 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1786 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1787 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1788 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1789 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1790 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1792 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1793 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1796 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1798 return (btrfs_header_flags(eb) & flag) == flag;
1801 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1803 u64 flags = btrfs_header_flags(eb);
1804 btrfs_set_header_flags(eb, flags | flag);
1805 return (flags & flag) == flag;
1808 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1810 u64 flags = btrfs_header_flags(eb);
1811 btrfs_set_header_flags(eb, flags & ~flag);
1812 return (flags & flag) == flag;
1815 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1817 u64 flags = btrfs_header_flags(eb);
1818 return flags >> BTRFS_BACKREF_REV_SHIFT;
1821 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1824 u64 flags = btrfs_header_flags(eb);
1825 flags &= ~BTRFS_BACKREF_REV_MASK;
1826 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1827 btrfs_set_header_flags(eb, flags);
1830 static inline unsigned long btrfs_header_fsid(void)
1832 return offsetof(struct btrfs_header, fsid);
1835 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1837 return offsetof(struct btrfs_header, chunk_tree_uuid);
1840 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1842 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1846 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1848 unsigned long ptr = offsetof(struct btrfs_header, csum);
1852 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1857 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1862 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1867 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1869 return (btrfs_header_level(eb) == 0);
1872 /* struct btrfs_root_item */
1873 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1875 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1876 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1877 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1879 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1881 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1882 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1883 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1884 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1885 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1886 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1887 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1888 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1890 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1892 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1894 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1896 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1898 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1901 /* struct btrfs_root_backup */
1902 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1904 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1906 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1907 tree_root_level, 8);
1909 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1911 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1912 chunk_root_gen, 64);
1913 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1914 chunk_root_level, 8);
1916 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1918 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1919 extent_root_gen, 64);
1920 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1921 extent_root_level, 8);
1923 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1925 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1927 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1930 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1932 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1934 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1937 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1939 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1941 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1942 csum_root_level, 8);
1943 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1945 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1947 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1950 /* struct btrfs_super_block */
1952 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1953 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1954 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1956 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1957 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1958 struct btrfs_super_block, sys_chunk_array_size, 32);
1959 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1960 struct btrfs_super_block, chunk_root_generation, 64);
1961 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1963 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1965 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1966 chunk_root_level, 8);
1967 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1969 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1970 log_root_transid, 64);
1971 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1973 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1975 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1977 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1979 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1981 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1983 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1985 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1986 root_dir_objectid, 64);
1987 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1989 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1991 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1992 compat_ro_flags, 64);
1993 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1994 incompat_flags, 64);
1995 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1997 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1998 cache_generation, 64);
1999 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2000 uuid_tree_generation, 64);
2001 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2003 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2005 int t = btrfs_super_csum_type(s);
2006 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2007 return btrfs_csum_sizes[t];
2010 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2012 return offsetof(struct btrfs_leaf, items);
2015 /* struct btrfs_file_extent_item */
2016 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2017 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2019 static inline unsigned long btrfs_file_extent_inline_start(struct
2020 btrfs_file_extent_item *e)
2022 unsigned long offset = (unsigned long)e;
2023 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2027 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2029 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2032 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2034 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2036 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2038 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2040 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2041 disk_num_bytes, 64);
2042 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2044 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2046 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2048 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2050 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2052 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2054 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2056 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2058 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2060 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2061 other_encoding, 16);
2063 /* btrfs_qgroup_status_item */
2064 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2066 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2068 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2070 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2073 /* btrfs_qgroup_info_item */
2074 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2076 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2078 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2079 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2080 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2082 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2083 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2085 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2086 struct btrfs_qgroup_info_item, generation, 64);
2087 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2088 struct btrfs_qgroup_info_item, referenced, 64);
2089 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2090 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2091 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2092 struct btrfs_qgroup_info_item, exclusive, 64);
2093 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2094 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2096 /* btrfs_qgroup_limit_item */
2097 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2099 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2100 max_referenced, 64);
2101 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2103 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2104 rsv_referenced, 64);
2105 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2108 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2109 struct btrfs_qgroup_limit_item, flags, 64);
2110 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2111 struct btrfs_qgroup_limit_item, max_referenced, 64);
2112 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2113 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2114 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2115 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2116 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2117 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2120 * this returns the number of bytes used by the item on disk, minus the
2121 * size of any extent headers. If a file is compressed on disk, this is
2122 * the compressed size
2124 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2125 struct btrfs_item *e)
2127 unsigned long offset;
2128 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2129 return btrfs_item_size(eb, e) - offset;
2132 /* this returns the number of file bytes represented by the inline item.
2133 * If an item is compressed, this is the uncompressed size
2135 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2137 struct btrfs_file_extent_item *fi)
2140 * return the space used on disk if this item isn't
2141 * compressed or encoded
2143 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2144 btrfs_file_extent_encryption(eb, fi) == 0 &&
2145 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2146 return btrfs_file_extent_inline_item_len(eb,
2147 btrfs_item_nr(slot));
2150 /* otherwise use the ram bytes field */
2151 return btrfs_file_extent_ram_bytes(eb, fi);
2154 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2156 return root->leafsize;
2157 return root->nodesize;
2160 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2162 struct btrfs_super_block *disk_super;
2163 disk_super = fs_info->super_copy;
2164 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2167 /* helper function to cast into the data area of the leaf. */
2168 #define btrfs_item_ptr(leaf, slot, type) \
2169 ((type *)(btrfs_leaf_data(leaf) + \
2170 btrfs_item_offset_nr(leaf, slot)))
2172 #define btrfs_item_ptr_offset(leaf, slot) \
2173 ((unsigned long)(btrfs_leaf_data(leaf) + \
2174 btrfs_item_offset_nr(leaf, slot)))
2177 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
2179 u64 num_bytes, u64 empty_size,
2180 u64 hint_byte, u64 search_end,
2181 struct btrfs_key *ins, int data);
2182 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2183 struct btrfs_root *root);
2184 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2185 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2186 u64 bytenr, u64 num_bytes);
2187 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2188 struct btrfs_root *root);
2189 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2190 btrfs_fs_info *info,
2192 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2193 btrfs_fs_info *info,
2195 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2196 struct btrfs_root *root,
2197 u32 blocksize, u64 root_objectid,
2198 struct btrfs_disk_key *key, int level,
2199 u64 hint, u64 empty_size);
2200 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2201 struct btrfs_root *root,
2202 u64 num_bytes, u64 parent,
2203 u64 root_objectid, u64 ref_generation,
2204 u64 owner, u64 empty_size, u64 hint_byte,
2205 u64 search_end, struct btrfs_key *ins, int data);
2206 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2207 struct btrfs_root *root, u64 bytenr,
2208 u64 offset, int metadata, u64 *refs, u64 *flags);
2209 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root,
2211 u64 bytenr, int level, u64 flags);
2212 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2213 struct extent_buffer *buf, int record_parent);
2214 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2215 struct extent_buffer *buf, int record_parent);
2216 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2217 struct btrfs_root *root,
2218 u64 bytenr, u64 num_bytes, u64 parent,
2219 u64 root_objectid, u64 owner, u64 offset);
2220 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2221 struct btrfs_root *root,
2222 struct extent_io_tree *unpin);
2223 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2224 struct btrfs_root *root,
2225 u64 bytenr, u64 num_bytes, u64 parent,
2226 u64 root_objectid, u64 ref_generation,
2227 u64 owner_objectid);
2228 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2229 struct btrfs_root *root, u64 bytenr,
2230 u64 orig_parent, u64 parent,
2231 u64 root_objectid, u64 ref_generation,
2232 u64 owner_objectid);
2233 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2234 struct btrfs_root *root);
2235 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2236 int btrfs_read_block_groups(struct btrfs_root *root);
2237 struct btrfs_block_group_cache *
2238 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2239 u64 chunk_objectid, u64 chunk_offset, u64 size);
2240 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2241 struct btrfs_root *root, u64 bytes_used,
2242 u64 type, u64 chunk_objectid, u64 chunk_offset,
2244 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2245 struct btrfs_root *root);
2246 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2247 struct btrfs_root *root, u64 bytenr, u64 num,
2248 int alloc, int mark_free);
2249 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2250 struct btrfs_root *root, u64 objectid,
2251 struct btrfs_inode_item *inode,
2252 u64 file_pos, u64 disk_bytenr,
2255 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2256 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2257 struct btrfs_path *path, int level, int slot);
2258 enum btrfs_tree_block_status
2259 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2260 struct extent_buffer *buf);
2261 enum btrfs_tree_block_status
2262 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2263 struct extent_buffer *buf);
2264 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2265 int level, int slot, u64 objectid);
2266 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2267 struct extent_buffer *parent, int slot);
2268 int btrfs_previous_item(struct btrfs_root *root,
2269 struct btrfs_path *path, u64 min_objectid,
2271 int btrfs_previous_extent_item(struct btrfs_root *root,
2272 struct btrfs_path *path, u64 min_objectid);
2273 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root, struct extent_buffer *buf,
2275 struct extent_buffer *parent, int parent_slot,
2276 struct extent_buffer **cow_ret);
2277 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *root,
2279 struct extent_buffer *buf,
2280 struct extent_buffer *parent, int parent_slot,
2281 struct extent_buffer **cow_ret,
2282 u64 search_start, u64 empty_size);
2283 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root,
2285 struct extent_buffer *buf,
2286 struct extent_buffer **cow_ret, u64 new_root_objectid);
2287 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2288 *root, struct btrfs_path *path, u32 data_size);
2289 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2290 struct btrfs_root *root,
2291 struct btrfs_path *path,
2292 u32 new_size, int from_end);
2293 int btrfs_split_item(struct btrfs_trans_handle *trans,
2294 struct btrfs_root *root,
2295 struct btrfs_path *path,
2296 struct btrfs_key *new_key,
2297 unsigned long split_offset);
2298 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2299 *root, struct btrfs_key *key, struct btrfs_path *p, int
2301 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2302 u64 iobjectid, u64 ioff, u8 key_type,
2303 struct btrfs_key *found_key);
2304 void btrfs_release_path(struct btrfs_path *p);
2305 void add_root_to_dirty_list(struct btrfs_root *root);
2306 struct btrfs_path *btrfs_alloc_path(void);
2307 void btrfs_free_path(struct btrfs_path *p);
2308 void btrfs_init_path(struct btrfs_path *p);
2309 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2310 struct btrfs_path *path, int slot, int nr);
2312 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root,
2314 struct btrfs_path *path)
2316 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2319 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2320 *root, struct btrfs_key *key, void *data, u32 data_size);
2321 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2322 struct btrfs_root *root,
2323 struct btrfs_path *path,
2324 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2326 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2327 struct btrfs_root *root,
2328 struct btrfs_path *path,
2329 struct btrfs_key *key,
2332 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2335 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2336 static inline int btrfs_next_item(struct btrfs_root *root,
2337 struct btrfs_path *p)
2340 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2341 return btrfs_next_leaf(root, p);
2345 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2346 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2347 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2348 struct btrfs_disk_key *key, int level);
2349 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2350 struct btrfs_key *new_key);
2351 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2352 struct btrfs_path *path,
2353 struct btrfs_key *new_key);
2356 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *tree_root,
2358 u64 root_id, u8 type, u64 ref_id,
2359 u64 dirid, u64 sequence,
2360 const char *name, int name_len);
2361 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2362 *root, struct btrfs_key *key, struct btrfs_root_item
2364 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2365 *root, struct btrfs_key *key, struct btrfs_root_item
2367 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2368 btrfs_root_item *item, struct btrfs_key *key);
2370 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2371 *root, const char *name, int name_len, u64 dir,
2372 struct btrfs_key *location, u8 type, u64 index);
2373 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2374 struct btrfs_root *root,
2375 struct btrfs_path *path, u64 dir,
2376 const char *name, int name_len,
2378 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2379 struct btrfs_root *root,
2380 struct btrfs_path *path, u64 dir,
2381 const char *name, int name_len,
2382 u64 index, int mod);
2383 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2384 struct btrfs_root *root,
2385 struct btrfs_path *path,
2386 struct btrfs_dir_item *di);
2387 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2388 struct btrfs_root *root, const char *name,
2389 u16 name_len, const void *data, u16 data_len,
2392 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2393 struct btrfs_root *fs_root,
2394 u64 dirid, u64 *objectid);
2397 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2398 struct btrfs_root *root,
2399 const char *name, int name_len,
2400 u64 inode_objectid, u64 ref_objectid, u64 index);
2401 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2402 *root, u64 objectid, struct btrfs_inode_item
2404 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2405 *root, struct btrfs_path *path,
2406 struct btrfs_key *location, int mod);
2407 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2408 *trans, struct btrfs_path *path, struct btrfs_root *root,
2409 u64 ino, u64 parent_ino, u64 index, const char *name,
2410 int namelen, int ins_len);
2411 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2412 struct btrfs_root *root,
2413 const char *name, int name_len,
2414 u64 inode_objectid, u64 ref_objectid,
2416 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root,
2418 const char *name, int name_len,
2419 u64 inode_objectid, u64 ref_objectid, u64 index);
2420 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root, struct btrfs_path *path,
2422 const char *name, int namelen, u64 ino, u64 parent_ino,
2423 u64 index, int ins_len);
2424 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2425 struct btrfs_root *root, const char *name, int name_len,
2426 u64 ino, u64 parent_ino, u64 *index);
2429 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2430 struct btrfs_root *root, u64 bytenr, u64 len);
2431 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2432 struct btrfs_root *root,
2433 u64 objectid, u64 pos, u64 offset,
2436 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *root, u64 objectid,
2438 u64 offset, char *buffer, size_t size);
2439 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2440 struct btrfs_root *root, u64 alloc_end,
2441 u64 bytenr, char *data, size_t len);
2442 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root, struct btrfs_path *path,
2447 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2448 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2451 static inline int is_fstree(u64 rootid)
2453 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2454 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2460 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2461 u64 dir, u64 index);
2462 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2464 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2465 u64 ino, u64 parent_ino, char *name, int namelen,
2466 u8 type, u64 *index, int add_backref);
2467 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2468 u64 ino, u64 parent_ino, u64 index, const char *name,
2469 int namelen, int add_orphan);
2470 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root, struct btrfs_path *path,
2473 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2474 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2477 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2478 struct btrfs_root *root,
2479 struct btrfs_path *path,
2480 u64 ino, u64 offset, u64 len, int ins_len);
2481 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 u64 ino, u64 offset, u64 len);