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 /* tracks free space in block groups. */
80 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
82 /* for storing balance parameters in the root tree */
83 #define BTRFS_BALANCE_OBJECTID -4ULL
85 /* oprhan objectid for tracking unlinked/truncated files */
86 #define BTRFS_ORPHAN_OBJECTID -5ULL
88 /* does write ahead logging to speed up fsyncs */
89 #define BTRFS_TREE_LOG_OBJECTID -6ULL
90 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
93 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
94 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
97 * extent checksums all have this objectid
98 * this allows them to share the logging tree
101 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
103 /* For storing free space cache */
104 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
107 * The inode number assigned to the special inode for sotring
110 #define BTRFS_FREE_INO_OBJECTID -12ULL
112 /* dummy objectid represents multiple objectids */
113 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
116 * All files have objectids in this range.
118 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
119 #define BTRFS_LAST_FREE_OBJECTID -256ULL
120 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
125 * the device items go into the chunk tree. The key is in the form
126 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
128 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
131 * the max metadata block size. This limit is somewhat artificial,
132 * but the memmove costs go through the roof for larger blocks.
134 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
137 * we can actually store much bigger names, but lets not confuse the rest
140 #define BTRFS_NAME_LEN 255
143 * Theoretical limit is larger, but we keep this down to a sane
144 * value. That should limit greatly the possibility of collisions on
147 #define BTRFS_LINK_MAX 65535U
149 /* 32 bytes in various csum fields */
150 #define BTRFS_CSUM_SIZE 32
153 #define BTRFS_CSUM_TYPE_CRC32 0
155 static int btrfs_csum_sizes[] = { 4 };
157 /* four bytes for CRC32 */
158 #define BTRFS_CRC32_SIZE 4
159 #define BTRFS_EMPTY_DIR_SIZE 0
161 #define BTRFS_FT_UNKNOWN 0
162 #define BTRFS_FT_REG_FILE 1
163 #define BTRFS_FT_DIR 2
164 #define BTRFS_FT_CHRDEV 3
165 #define BTRFS_FT_BLKDEV 4
166 #define BTRFS_FT_FIFO 5
167 #define BTRFS_FT_SOCK 6
168 #define BTRFS_FT_SYMLINK 7
169 #define BTRFS_FT_XATTR 8
170 #define BTRFS_FT_MAX 9
172 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
175 * the key defines the order in the tree, and so it also defines (optimal)
176 * block layout. objectid corresonds to the inode number. The flags
177 * tells us things about the object, and is a kind of stream selector.
178 * so for a given inode, keys with flags of 1 might refer to the inode
179 * data, flags of 2 may point to file data in the btree and flags == 3
180 * may point to extents.
182 * offset is the starting byte offset for this key in the stream.
184 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
185 * in cpu native order. Otherwise they are identical and their sizes
186 * should be the same (ie both packed)
188 struct btrfs_disk_key {
192 } __attribute__ ((__packed__));
198 } __attribute__ ((__packed__));
200 struct btrfs_mapping_tree {
201 struct cache_tree cache_tree;
204 #define BTRFS_UUID_SIZE 16
205 struct btrfs_dev_item {
206 /* the internal btrfs device id */
209 /* size of the device */
215 /* optimal io alignment for this device */
218 /* optimal io width for this device */
221 /* minimal io size for this device */
224 /* type and info about this device */
227 /* expected generation for this device */
231 * starting byte of this partition on the device,
232 * to allowr for stripe alignment in the future
236 /* grouping information for allocation decisions */
239 /* seek speed 0-100 where 100 is fastest */
242 /* bandwidth 0-100 where 100 is fastest */
245 /* btrfs generated uuid for this device */
246 u8 uuid[BTRFS_UUID_SIZE];
248 /* uuid of FS who owns this device */
249 u8 fsid[BTRFS_UUID_SIZE];
250 } __attribute__ ((__packed__));
252 struct btrfs_stripe {
255 u8 dev_uuid[BTRFS_UUID_SIZE];
256 } __attribute__ ((__packed__));
259 /* size of this chunk in bytes */
262 /* objectid of the root referencing this chunk */
268 /* optimal io alignment for this chunk */
271 /* optimal io width for this chunk */
274 /* minimal io size for this chunk */
277 /* 2^16 stripes is quite a lot, a second limit is the size of a single
282 /* sub stripes only matter for raid10 */
284 struct btrfs_stripe stripe;
285 /* additional stripes go here */
286 } __attribute__ ((__packed__));
288 #define BTRFS_FREE_SPACE_EXTENT 1
289 #define BTRFS_FREE_SPACE_BITMAP 2
291 struct btrfs_free_space_entry {
295 } __attribute__ ((__packed__));
297 struct btrfs_free_space_header {
298 struct btrfs_disk_key location;
302 } __attribute__ ((__packed__));
304 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
306 BUG_ON(num_stripes == 0);
307 return sizeof(struct btrfs_chunk) +
308 sizeof(struct btrfs_stripe) * (num_stripes - 1);
311 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
312 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
313 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
314 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
315 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
316 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
318 #define BTRFS_BACKREF_REV_MAX 256
319 #define BTRFS_BACKREF_REV_SHIFT 56
320 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
321 BTRFS_BACKREF_REV_SHIFT)
323 #define BTRFS_OLD_BACKREF_REV 0
324 #define BTRFS_MIXED_BACKREF_REV 1
327 * every tree block (leaf or node) starts with this header.
329 struct btrfs_header {
330 /* these first four must match the super block */
331 u8 csum[BTRFS_CSUM_SIZE];
332 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
333 __le64 bytenr; /* which block this node is supposed to live in */
336 /* allowed to be different from the super from here on down */
337 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
342 } __attribute__ ((__packed__));
344 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
345 sizeof(struct btrfs_header)) / \
346 sizeof(struct btrfs_key_ptr))
347 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
348 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
349 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
350 sizeof(struct btrfs_item) - \
351 sizeof(struct btrfs_file_extent_item))
352 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
353 sizeof(struct btrfs_item) -\
354 sizeof(struct btrfs_dir_item))
358 * this is a very generous portion of the super block, giving us
359 * room to translate 14 chunks with 3 stripes each.
361 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
362 #define BTRFS_LABEL_SIZE 256
365 * just in case we somehow lose the roots and are not able to mount,
366 * we store an array of the roots from previous transactions
369 #define BTRFS_NUM_BACKUP_ROOTS 4
370 struct btrfs_root_backup {
372 __le64 tree_root_gen;
375 __le64 chunk_root_gen;
378 __le64 extent_root_gen;
387 __le64 csum_root_gen;
397 u8 extent_root_level;
401 /* future and to align */
403 } __attribute__ ((__packed__));
406 * the super block basically lists the main trees of the FS
407 * it currently lacks any block count etc etc
409 struct btrfs_super_block {
410 u8 csum[BTRFS_CSUM_SIZE];
411 /* the first 3 fields must match struct btrfs_header */
412 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
413 __le64 bytenr; /* this block number */
416 /* allowed to be different from the btrfs_header from here own down */
423 /* this will help find the new super based on the log root */
424 __le64 log_root_transid;
427 __le64 root_dir_objectid;
433 __le32 sys_chunk_array_size;
434 __le64 chunk_root_generation;
436 __le64 compat_ro_flags;
437 __le64 incompat_flags;
442 struct btrfs_dev_item dev_item;
444 char label[BTRFS_LABEL_SIZE];
446 __le64 cache_generation;
447 __le64 uuid_tree_generation;
449 /* future expansion */
451 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
452 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
453 } __attribute__ ((__packed__));
456 * Compat flags that we support. If any incompat flags are set other than the
457 * ones specified below then we will fail to mount
459 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
461 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
462 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
463 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
464 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
467 * some patches floated around with a second compression method
468 * lets save that incompat here for when they do get in
469 * Note we don't actually support it, we're just reserving the
472 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
475 * older kernels tried to do bigger metadata blocks, but the
476 * code was pretty buggy. Lets not let them try anymore.
478 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
479 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
480 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
481 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
482 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
484 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
486 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
488 #define BTRFS_FEATURE_INCOMPAT_SUPP \
489 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
490 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
491 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
492 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
493 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
494 BTRFS_FEATURE_INCOMPAT_RAID56 | \
495 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
496 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
497 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
500 * A leaf is full of items. offset and size tell us where to find
501 * the item in the leaf (relative to the start of the data area)
504 struct btrfs_disk_key key;
507 } __attribute__ ((__packed__));
510 * leaves have an item area and a data area:
511 * [item0, item1....itemN] [free space] [dataN...data1, data0]
513 * The data is separate from the items to get the keys closer together
517 struct btrfs_header header;
518 struct btrfs_item items[];
519 } __attribute__ ((__packed__));
522 * all non-leaf blocks are nodes, they hold only keys and pointers to
525 struct btrfs_key_ptr {
526 struct btrfs_disk_key key;
529 } __attribute__ ((__packed__));
532 struct btrfs_header header;
533 struct btrfs_key_ptr ptrs[];
534 } __attribute__ ((__packed__));
537 * btrfs_paths remember the path taken from the root down to the leaf.
538 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
539 * to any other levels that are present.
541 * The slots array records the index of the item or block pointer
542 * used while walking the tree.
546 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
547 int slots[BTRFS_MAX_LEVEL];
548 /* if there is real range locking, this locks field will change */
549 int locks[BTRFS_MAX_LEVEL];
551 /* keep some upper locks as we walk down */
555 * set by btrfs_split_item, tells search_slot to keep all locks
556 * and to force calls to keep space in the nodes
558 unsigned int search_for_split:1;
559 unsigned int skip_check_block:1;
563 * items in the extent btree are used to record the objectid of the
564 * owner of the block and the number of references
567 struct btrfs_extent_item {
571 } __attribute__ ((__packed__));
573 struct btrfs_extent_item_v0 {
575 } __attribute__ ((__packed__));
577 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
578 sizeof(struct btrfs_item))
580 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
581 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
583 /* following flags only apply to tree blocks */
585 /* use full backrefs for extent pointers in the block*/
586 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
588 struct btrfs_tree_block_info {
589 struct btrfs_disk_key key;
591 } __attribute__ ((__packed__));
593 struct btrfs_extent_data_ref {
598 } __attribute__ ((__packed__));
600 struct btrfs_shared_data_ref {
602 } __attribute__ ((__packed__));
604 struct btrfs_extent_inline_ref {
607 } __attribute__ ((__packed__));
609 struct btrfs_extent_ref_v0 {
614 } __attribute__ ((__packed__));
616 /* dev extents record free space on individual devices. The owner
617 * field points back to the chunk allocation mapping tree that allocated
618 * the extent. The chunk tree uuid field is a way to double check the owner
620 struct btrfs_dev_extent {
622 __le64 chunk_objectid;
625 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
626 } __attribute__ ((__packed__));
628 struct btrfs_inode_ref {
632 } __attribute__ ((__packed__));
634 struct btrfs_inode_extref {
635 __le64 parent_objectid;
638 __u8 name[0]; /* name goes here */
639 } __attribute__ ((__packed__));
641 struct btrfs_timespec {
644 } __attribute__ ((__packed__));
647 BTRFS_COMPRESS_NONE = 0,
648 BTRFS_COMPRESS_ZLIB = 1,
649 BTRFS_COMPRESS_LZO = 2,
650 BTRFS_COMPRESS_TYPES = 2,
651 BTRFS_COMPRESS_LAST = 3,
652 } btrfs_compression_type;
654 /* we don't understand any encryption methods right now */
656 BTRFS_ENCRYPTION_NONE = 0,
657 BTRFS_ENCRYPTION_LAST = 1,
658 } btrfs_encryption_type;
660 enum btrfs_tree_block_status {
661 BTRFS_TREE_BLOCK_CLEAN,
662 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
663 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
664 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
665 BTRFS_TREE_BLOCK_INVALID_LEVEL,
666 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
667 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
670 struct btrfs_inode_item {
671 /* nfs style generation number */
673 /* transid that last touched this inode */
685 /* modification sequence number for NFS */
689 * a little future expansion, for more than this we can
690 * just grow the inode item and version it
693 struct btrfs_timespec atime;
694 struct btrfs_timespec ctime;
695 struct btrfs_timespec mtime;
696 struct btrfs_timespec otime;
697 } __attribute__ ((__packed__));
699 struct btrfs_dir_log_item {
701 } __attribute__ ((__packed__));
703 struct btrfs_dir_item {
704 struct btrfs_disk_key location;
709 } __attribute__ ((__packed__));
711 struct btrfs_root_item_v0 {
712 struct btrfs_inode_item inode;
718 __le64 last_snapshot;
721 struct btrfs_disk_key drop_progress;
724 } __attribute__ ((__packed__));
726 struct btrfs_root_item {
727 struct btrfs_inode_item inode;
733 __le64 last_snapshot;
736 struct btrfs_disk_key drop_progress;
741 * The following fields appear after subvol_uuids+subvol_times
746 * This generation number is used to test if the new fields are valid
747 * and up to date while reading the root item. Everytime the root item
748 * is written out, the "generation" field is copied into this field. If
749 * anyone ever mounted the fs with an older kernel, we will have
750 * mismatching generation values here and thus must invalidate the
751 * new fields. See btrfs_update_root and btrfs_find_last_root for
753 * the offset of generation_v2 is also used as the start for the memset
754 * when invalidating the fields.
756 __le64 generation_v2;
757 u8 uuid[BTRFS_UUID_SIZE];
758 u8 parent_uuid[BTRFS_UUID_SIZE];
759 u8 received_uuid[BTRFS_UUID_SIZE];
760 __le64 ctransid; /* updated when an inode changes */
761 __le64 otransid; /* trans when created */
762 __le64 stransid; /* trans when sent. non-zero for received subvol */
763 __le64 rtransid; /* trans when received. non-zero for received subvol */
764 struct btrfs_timespec ctime;
765 struct btrfs_timespec otime;
766 struct btrfs_timespec stime;
767 struct btrfs_timespec rtime;
768 __le64 reserved[8]; /* for future */
769 } __attribute__ ((__packed__));
772 * this is used for both forward and backward root refs
774 struct btrfs_root_ref {
778 } __attribute__ ((__packed__));
780 #define BTRFS_FILE_EXTENT_INLINE 0
781 #define BTRFS_FILE_EXTENT_REG 1
782 #define BTRFS_FILE_EXTENT_PREALLOC 2
784 struct btrfs_file_extent_item {
786 * transaction id that created this extent
790 * max number of bytes to hold this extent in ram
791 * when we split a compressed extent we can't know how big
792 * each of the resulting pieces will be. So, this is
793 * an upper limit on the size of the extent in ram instead of
799 * 32 bits for the various ways we might encode the data,
800 * including compression and encryption. If any of these
801 * are set to something a given disk format doesn't understand
802 * it is treated like an incompat flag for reading and writing,
807 __le16 other_encoding; /* spare for later use */
809 /* are we inline data or a real extent? */
813 * disk space consumed by the extent, checksum blocks are included
817 __le64 disk_num_bytes;
819 * the logical offset in file blocks (no csums)
820 * this extent record is for. This allows a file extent to point
821 * into the middle of an existing extent on disk, sharing it
822 * between two snapshots (useful if some bytes in the middle of the
823 * extent have changed
827 * the logical number of file blocks (no csums included)
831 } __attribute__ ((__packed__));
833 struct btrfs_csum_item {
835 } __attribute__ ((__packed__));
838 * We don't want to overwrite 1M at the beginning of device, even though
839 * there is our 1st superblock at 64k. Some possible reasons:
840 * - the first 64k blank is useful for some boot loader/manager
841 * - the first 1M could be scratched by buggy partitioner or somesuch
843 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
845 /* tag for the radix tree of block groups in ram */
846 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
847 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
848 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
849 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
850 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
851 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
852 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
853 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
854 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
855 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
856 #define BTRFS_NR_RAID_TYPES 7
858 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
859 BTRFS_BLOCK_GROUP_SYSTEM | \
860 BTRFS_BLOCK_GROUP_METADATA)
862 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
863 BTRFS_BLOCK_GROUP_RAID1 | \
864 BTRFS_BLOCK_GROUP_RAID5 | \
865 BTRFS_BLOCK_GROUP_RAID6 | \
866 BTRFS_BLOCK_GROUP_DUP | \
867 BTRFS_BLOCK_GROUP_RAID10)
869 /* used in struct btrfs_balance_args fields */
870 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
873 * GLOBAL_RSV does not exist as a on-disk block group type and is used
874 * internally for exporting info about global block reserve from space infos
876 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
878 #define BTRFS_QGROUP_LEVEL_SHIFT 48
880 static inline u64 btrfs_qgroup_level(u64 qgroupid)
882 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
885 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
887 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
890 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
891 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
892 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
894 struct btrfs_qgroup_status_item {
898 __le64 scan; /* progress during scanning */
899 } __attribute__ ((__packed__));
901 struct btrfs_block_group_item {
903 __le64 chunk_objectid;
905 } __attribute__ ((__packed__));
907 struct btrfs_free_space_info {
910 } __attribute__ ((__packed__));
912 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
914 struct btrfs_qgroup_info_item {
917 __le64 referenced_compressed;
919 __le64 exclusive_compressed;
920 } __attribute__ ((__packed__));
922 /* flags definition for qgroup limits */
923 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
924 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
925 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
926 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
927 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
928 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
930 struct btrfs_qgroup_limit_item {
932 __le64 max_referenced;
933 __le64 max_exclusive;
934 __le64 rsv_referenced;
935 __le64 rsv_exclusive;
936 } __attribute__ ((__packed__));
938 struct btrfs_space_info {
944 struct list_head list;
947 struct btrfs_block_group_cache {
948 struct cache_extent cache;
949 struct btrfs_key key;
950 struct btrfs_block_group_item item;
951 struct btrfs_space_info *space_info;
952 struct btrfs_free_space_ctl *free_space_ctl;
960 struct btrfs_extent_ops {
961 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
962 u64 hint_byte, struct btrfs_key *ins, int metadata);
963 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
968 struct btrfs_fs_devices;
969 struct btrfs_fs_info {
970 u8 fsid[BTRFS_FSID_SIZE];
972 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
973 u8 *new_chunk_tree_uuid;
974 struct btrfs_root *fs_root;
975 struct btrfs_root *extent_root;
976 struct btrfs_root *tree_root;
977 struct btrfs_root *chunk_root;
978 struct btrfs_root *dev_root;
979 struct btrfs_root *csum_root;
980 struct btrfs_root *quota_root;
981 struct btrfs_root *free_space_root;
983 struct rb_root fs_root_tree;
985 /* the log root tree is a directory of all the other log roots */
986 struct btrfs_root *log_root_tree;
988 struct extent_io_tree extent_cache;
989 struct extent_io_tree free_space_cache;
990 struct extent_io_tree block_group_cache;
991 struct extent_io_tree pinned_extents;
992 struct extent_io_tree pending_del;
993 struct extent_io_tree extent_ins;
994 struct extent_io_tree *excluded_extents;
996 /* logical->physical extent mapping */
997 struct btrfs_mapping_tree mapping_tree;
1000 u64 last_trans_committed;
1002 u64 avail_data_alloc_bits;
1003 u64 avail_metadata_alloc_bits;
1004 u64 avail_system_alloc_bits;
1005 u64 data_alloc_profile;
1006 u64 metadata_alloc_profile;
1007 u64 system_alloc_profile;
1010 struct btrfs_trans_handle *running_transaction;
1011 struct btrfs_super_block *super_copy;
1012 struct mutex fs_mutex;
1017 struct btrfs_extent_ops *extent_ops;
1018 struct list_head dirty_cowonly_roots;
1019 struct list_head recow_ebs;
1021 struct btrfs_fs_devices *fs_devices;
1022 struct list_head space_info;
1025 unsigned int readonly:1;
1026 unsigned int on_restoring:1;
1027 unsigned int is_chunk_recover:1;
1028 unsigned int quota_enabled:1;
1029 unsigned int suppress_check_block_errors:1;
1030 unsigned int ignore_fsid_mismatch:1;
1032 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1033 struct btrfs_root *root,
1034 u64 bytenr, u64 num_bytes, u64 parent,
1035 u64 root_objectid, u64 owner, u64 offset,
1037 struct cache_tree *fsck_extent_cache;
1038 struct cache_tree *corrupt_blocks;
1043 * in ram representation of the tree. extent_root is used for all allocations
1044 * and for the extent tree extent_root root.
1047 struct extent_buffer *node;
1048 struct extent_buffer *commit_root;
1049 struct btrfs_root_item root_item;
1050 struct btrfs_key root_key;
1051 struct btrfs_fs_info *fs_info;
1055 /* data allocations are done in sectorsize units */
1058 /* node allocations are done in nodesize units */
1061 /* leaf allocations are done in leafsize units */
1064 /* leaf allocations are done in leafsize units */
1073 u64 last_inode_alloc;
1076 * Record orphan data extent ref
1078 * TODO: Don't restore things in btrfs_root.
1079 * Directly record it into inode_record, which needs a lot of
1080 * infrastructure change to allow cooperation between extent
1083 struct list_head orphan_data_extents;
1085 /* the dirty list is only used by non-reference counted roots */
1086 struct list_head dirty_list;
1087 struct rb_node rb_node;
1091 * inode items have the data typically returned from stat and store other
1092 * info about object characteristics. There is one for every file and dir in
1095 #define BTRFS_INODE_ITEM_KEY 1
1096 #define BTRFS_INODE_REF_KEY 12
1097 #define BTRFS_INODE_EXTREF_KEY 13
1098 #define BTRFS_XATTR_ITEM_KEY 24
1099 #define BTRFS_ORPHAN_ITEM_KEY 48
1101 #define BTRFS_DIR_LOG_ITEM_KEY 60
1102 #define BTRFS_DIR_LOG_INDEX_KEY 72
1104 * dir items are the name -> inode pointers in a directory. There is one
1105 * for every name in a directory.
1107 #define BTRFS_DIR_ITEM_KEY 84
1108 #define BTRFS_DIR_INDEX_KEY 96
1111 * extent data is for file data
1113 #define BTRFS_EXTENT_DATA_KEY 108
1116 * csum items have the checksums for data in the extents
1118 #define BTRFS_CSUM_ITEM_KEY 120
1120 * extent csums are stored in a separate tree and hold csums for
1121 * an entire extent on disk.
1123 #define BTRFS_EXTENT_CSUM_KEY 128
1126 * root items point to tree roots. There are typically in the root
1127 * tree used by the super block to find all the other trees
1129 #define BTRFS_ROOT_ITEM_KEY 132
1132 * root backrefs tie subvols and snapshots to the directory entries that
1135 #define BTRFS_ROOT_BACKREF_KEY 144
1138 * root refs make a fast index for listing all of the snapshots and
1139 * subvolumes referenced by a given root. They point directly to the
1140 * directory item in the root that references the subvol
1142 #define BTRFS_ROOT_REF_KEY 156
1145 * extent items are in the extent map tree. These record which blocks
1146 * are used, and how many references there are to each block
1148 #define BTRFS_EXTENT_ITEM_KEY 168
1151 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1152 * the length, so we save the level in key->offset instead of the length.
1154 #define BTRFS_METADATA_ITEM_KEY 169
1156 #define BTRFS_TREE_BLOCK_REF_KEY 176
1158 #define BTRFS_EXTENT_DATA_REF_KEY 178
1160 /* old style extent backrefs */
1161 #define BTRFS_EXTENT_REF_V0_KEY 180
1163 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1165 #define BTRFS_SHARED_DATA_REF_KEY 184
1169 * block groups give us hints into the extent allocation trees. Which
1170 * blocks are free etc etc
1172 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1175 * Every block group is represented in the free space tree by a free space info
1176 * item, which stores some accounting information. It is keyed on
1177 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1179 #define BTRFS_FREE_SPACE_INFO_KEY 198
1182 * A free space extent tracks an extent of space that is free in a block group.
1183 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1185 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1188 * When a block group becomes very fragmented, we convert it to use bitmaps
1189 * instead of extents. A free space bitmap is keyed on
1190 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1191 * (length / sectorsize) bits.
1193 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1195 #define BTRFS_DEV_EXTENT_KEY 204
1196 #define BTRFS_DEV_ITEM_KEY 216
1197 #define BTRFS_CHUNK_ITEM_KEY 228
1199 #define BTRFS_BALANCE_ITEM_KEY 248
1204 #define BTRFS_QGROUP_STATUS_KEY 240
1205 #define BTRFS_QGROUP_INFO_KEY 242
1206 #define BTRFS_QGROUP_LIMIT_KEY 244
1207 #define BTRFS_QGROUP_RELATION_KEY 246
1210 * Persistently stores the io stats in the device tree.
1211 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1213 #define BTRFS_DEV_STATS_KEY 249
1216 * Persistently stores the device replace state in the device tree.
1217 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1219 #define BTRFS_DEV_REPLACE_KEY 250
1222 * Stores items that allow to quickly map UUIDs to something else.
1223 * These items are part of the filesystem UUID tree.
1224 * The key is built like this:
1225 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1227 #if BTRFS_UUID_SIZE != 16
1228 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1230 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1231 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1232 * received subvols */
1235 * string items are for debugging. They just store a short string of
1238 #define BTRFS_STRING_ITEM_KEY 253
1242 #define BTRFS_INODE_NODATASUM (1 << 0)
1243 #define BTRFS_INODE_NODATACOW (1 << 1)
1244 #define BTRFS_INODE_READONLY (1 << 2)
1246 #define read_eb_member(eb, ptr, type, member, result) ( \
1247 read_extent_buffer(eb, (char *)(result), \
1248 ((unsigned long)(ptr)) + \
1249 offsetof(type, member), \
1250 sizeof(((type *)0)->member)))
1252 #define write_eb_member(eb, ptr, type, member, result) ( \
1253 write_extent_buffer(eb, (char *)(result), \
1254 ((unsigned long)(ptr)) + \
1255 offsetof(type, member), \
1256 sizeof(((type *)0)->member)))
1258 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1259 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1261 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1262 return le##bits##_to_cpu(h->member); \
1264 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1267 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1268 h->member = cpu_to_le##bits(val); \
1271 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1272 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1275 unsigned long offset = (unsigned long)s; \
1276 const type *p = (type *) (eb->data + offset); \
1277 return get_unaligned_le##bits(&p->member); \
1279 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1280 type *s, u##bits val) \
1282 unsigned long offset = (unsigned long)s; \
1283 type *p = (type *) (eb->data + offset); \
1284 put_unaligned_le##bits(val, &p->member); \
1287 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1288 static inline u##bits btrfs_##name(const type *s) \
1290 return le##bits##_to_cpu(s->member); \
1292 static inline void btrfs_set_##name(type *s, u##bits val) \
1294 s->member = cpu_to_le##bits(val); \
1297 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1298 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1299 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1300 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1301 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1302 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1304 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1305 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1306 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1307 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1308 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1309 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1311 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1312 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1314 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1316 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1318 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1320 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1322 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1323 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1329 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1332 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1334 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1337 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1339 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1342 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1343 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1344 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1345 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1346 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1347 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1348 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1349 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1350 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1351 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1352 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1354 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1356 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1359 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1360 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1361 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1363 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1369 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1374 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1375 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1377 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1380 unsigned long offset = (unsigned long)c;
1381 offset += offsetof(struct btrfs_chunk, stripe);
1382 offset += nr * sizeof(struct btrfs_stripe);
1383 return (struct btrfs_stripe *)offset;
1386 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1388 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1391 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1392 struct btrfs_chunk *c, int nr)
1394 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1397 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1398 struct btrfs_chunk *c, int nr,
1401 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1404 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1405 struct btrfs_chunk *c, int nr)
1407 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1410 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1411 struct btrfs_chunk *c, int nr,
1414 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1417 /* struct btrfs_block_group_item */
1418 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1420 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1422 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1423 struct btrfs_block_group_item, chunk_objectid, 64);
1425 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1426 struct btrfs_block_group_item, chunk_objectid, 64);
1427 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1428 struct btrfs_block_group_item, flags, 64);
1429 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1430 struct btrfs_block_group_item, flags, 64);
1432 /* struct btrfs_free_space_info */
1433 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1435 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1437 /* struct btrfs_inode_ref */
1438 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1439 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1440 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1442 /* struct btrfs_inode_extref */
1443 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1444 parent_objectid, 64);
1445 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1447 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1449 /* struct btrfs_inode_item */
1450 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1451 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1452 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1453 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1454 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1455 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1456 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1457 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1458 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1459 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1460 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1461 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1463 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1464 struct btrfs_inode_item, generation, 64);
1465 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1466 struct btrfs_inode_item, sequence, 64);
1467 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1468 struct btrfs_inode_item, transid, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1470 struct btrfs_inode_item, size, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1472 struct btrfs_inode_item, nbytes, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1474 struct btrfs_inode_item, block_group, 64);
1475 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1476 struct btrfs_inode_item, nlink, 32);
1477 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1478 struct btrfs_inode_item, uid, 32);
1479 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1480 struct btrfs_inode_item, gid, 32);
1481 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1482 struct btrfs_inode_item, mode, 32);
1483 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1484 struct btrfs_inode_item, rdev, 64);
1485 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1486 struct btrfs_inode_item, flags, 64);
1488 static inline struct btrfs_timespec *
1489 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1491 unsigned long ptr = (unsigned long)inode_item;
1492 ptr += offsetof(struct btrfs_inode_item, atime);
1493 return (struct btrfs_timespec *)ptr;
1496 static inline struct btrfs_timespec *
1497 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1499 unsigned long ptr = (unsigned long)inode_item;
1500 ptr += offsetof(struct btrfs_inode_item, mtime);
1501 return (struct btrfs_timespec *)ptr;
1504 static inline struct btrfs_timespec *
1505 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1507 unsigned long ptr = (unsigned long)inode_item;
1508 ptr += offsetof(struct btrfs_inode_item, ctime);
1509 return (struct btrfs_timespec *)ptr;
1512 static inline struct btrfs_timespec *
1513 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1515 unsigned long ptr = (unsigned long)inode_item;
1516 ptr += offsetof(struct btrfs_inode_item, otime);
1517 return (struct btrfs_timespec *)ptr;
1520 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1521 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1522 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1524 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1527 /* struct btrfs_dev_extent */
1528 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1530 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1531 chunk_objectid, 64);
1532 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1534 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1536 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1539 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1541 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1542 return (u8 *)((unsigned long)dev + ptr);
1546 /* struct btrfs_extent_item */
1547 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1548 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1549 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1551 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1552 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1554 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1556 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1558 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1559 struct btrfs_tree_block_info *item,
1560 struct btrfs_disk_key *key)
1562 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1565 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1566 struct btrfs_tree_block_info *item,
1567 struct btrfs_disk_key *key)
1569 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1572 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1574 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1576 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1578 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1581 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1584 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1586 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1588 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1589 struct btrfs_extent_inline_ref, type, 8);
1590 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1591 struct btrfs_extent_inline_ref, offset, 64);
1593 static inline u32 btrfs_extent_inline_ref_size(int type)
1595 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1596 type == BTRFS_SHARED_BLOCK_REF_KEY)
1597 return sizeof(struct btrfs_extent_inline_ref);
1598 if (type == BTRFS_SHARED_DATA_REF_KEY)
1599 return sizeof(struct btrfs_shared_data_ref) +
1600 sizeof(struct btrfs_extent_inline_ref);
1601 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1602 return sizeof(struct btrfs_extent_data_ref) +
1603 offsetof(struct btrfs_extent_inline_ref, offset);
1608 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1609 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1611 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1612 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1614 /* struct btrfs_node */
1615 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1616 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1618 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1621 ptr = offsetof(struct btrfs_node, ptrs) +
1622 sizeof(struct btrfs_key_ptr) * nr;
1623 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1626 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1630 ptr = offsetof(struct btrfs_node, ptrs) +
1631 sizeof(struct btrfs_key_ptr) * nr;
1632 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1635 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1638 ptr = offsetof(struct btrfs_node, ptrs) +
1639 sizeof(struct btrfs_key_ptr) * nr;
1640 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1643 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1647 ptr = offsetof(struct btrfs_node, ptrs) +
1648 sizeof(struct btrfs_key_ptr) * nr;
1649 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1652 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1654 return offsetof(struct btrfs_node, ptrs) +
1655 sizeof(struct btrfs_key_ptr) * nr;
1658 static inline void btrfs_node_key(struct extent_buffer *eb,
1659 struct btrfs_disk_key *disk_key, int nr)
1662 ptr = btrfs_node_key_ptr_offset(nr);
1663 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1664 struct btrfs_key_ptr, key, disk_key);
1667 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1668 struct btrfs_disk_key *disk_key, int nr)
1671 ptr = btrfs_node_key_ptr_offset(nr);
1672 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1673 struct btrfs_key_ptr, key, disk_key);
1676 /* struct btrfs_item */
1677 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1678 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1680 static inline unsigned long btrfs_item_nr_offset(int nr)
1682 return offsetof(struct btrfs_leaf, items) +
1683 sizeof(struct btrfs_item) * nr;
1686 static inline struct btrfs_item *btrfs_item_nr(int nr)
1688 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1691 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1692 struct btrfs_item *item)
1694 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1697 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1699 return btrfs_item_end(eb, btrfs_item_nr(nr));
1702 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1704 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1707 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1709 return btrfs_item_size(eb, btrfs_item_nr(nr));
1712 static inline void btrfs_item_key(struct extent_buffer *eb,
1713 struct btrfs_disk_key *disk_key, int nr)
1715 struct btrfs_item *item = btrfs_item_nr(nr);
1716 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1719 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1720 struct btrfs_disk_key *disk_key, int nr)
1722 struct btrfs_item *item = btrfs_item_nr(nr);
1723 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1726 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1729 * struct btrfs_root_ref
1731 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1732 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1733 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1735 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1736 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1737 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1739 /* struct btrfs_dir_item */
1740 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1741 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1742 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1743 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1745 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1747 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1748 struct btrfs_dir_item *item,
1749 struct btrfs_disk_key *key)
1751 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1754 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1755 struct btrfs_dir_item *item,
1756 struct btrfs_disk_key *key)
1758 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1761 /* struct btrfs_free_space_header */
1762 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1764 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1766 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1769 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1770 struct btrfs_free_space_header *h,
1771 struct btrfs_disk_key *key)
1773 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1776 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1777 struct btrfs_free_space_header *h,
1778 struct btrfs_disk_key *key)
1780 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1783 /* struct btrfs_disk_key */
1784 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1786 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1787 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1789 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1790 struct btrfs_disk_key *disk)
1792 cpu->offset = le64_to_cpu(disk->offset);
1793 cpu->type = disk->type;
1794 cpu->objectid = le64_to_cpu(disk->objectid);
1797 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1798 struct btrfs_key *cpu)
1800 disk->offset = cpu_to_le64(cpu->offset);
1801 disk->type = cpu->type;
1802 disk->objectid = cpu_to_le64(cpu->objectid);
1805 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1806 struct btrfs_key *key, int nr)
1808 struct btrfs_disk_key disk_key;
1809 btrfs_node_key(eb, &disk_key, nr);
1810 btrfs_disk_key_to_cpu(key, &disk_key);
1813 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1814 struct btrfs_key *key, int nr)
1816 struct btrfs_disk_key disk_key;
1817 btrfs_item_key(eb, &disk_key, nr);
1818 btrfs_disk_key_to_cpu(key, &disk_key);
1821 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1822 struct btrfs_dir_item *item,
1823 struct btrfs_key *key)
1825 struct btrfs_disk_key disk_key;
1826 btrfs_dir_item_key(eb, item, &disk_key);
1827 btrfs_disk_key_to_cpu(key, &disk_key);
1831 static inline u8 btrfs_key_type(struct btrfs_key *key)
1836 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1841 /* struct btrfs_header */
1842 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1843 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1845 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1846 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1847 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1848 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1849 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1850 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1852 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1853 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1856 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1858 return (btrfs_header_flags(eb) & flag) == flag;
1861 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1863 u64 flags = btrfs_header_flags(eb);
1864 btrfs_set_header_flags(eb, flags | flag);
1865 return (flags & flag) == flag;
1868 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1870 u64 flags = btrfs_header_flags(eb);
1871 btrfs_set_header_flags(eb, flags & ~flag);
1872 return (flags & flag) == flag;
1875 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1877 u64 flags = btrfs_header_flags(eb);
1878 return flags >> BTRFS_BACKREF_REV_SHIFT;
1881 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1884 u64 flags = btrfs_header_flags(eb);
1885 flags &= ~BTRFS_BACKREF_REV_MASK;
1886 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1887 btrfs_set_header_flags(eb, flags);
1890 static inline unsigned long btrfs_header_fsid(void)
1892 return offsetof(struct btrfs_header, fsid);
1895 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1897 return offsetof(struct btrfs_header, chunk_tree_uuid);
1900 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1902 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1906 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1908 unsigned long ptr = offsetof(struct btrfs_header, csum);
1912 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1917 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1922 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1927 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1929 return (btrfs_header_level(eb) == 0);
1932 /* struct btrfs_root_item */
1933 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1935 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1936 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1937 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1939 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1941 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1942 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1943 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1944 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1945 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1946 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1947 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1948 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1950 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1952 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1954 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1956 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1958 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1961 /* struct btrfs_root_backup */
1962 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1964 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1966 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1967 tree_root_level, 8);
1969 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1971 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1972 chunk_root_gen, 64);
1973 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1974 chunk_root_level, 8);
1976 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1978 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1979 extent_root_gen, 64);
1980 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1981 extent_root_level, 8);
1983 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1985 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1987 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1990 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1992 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1994 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1997 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1999 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2001 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2002 csum_root_level, 8);
2003 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2005 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2010 /* struct btrfs_super_block */
2012 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2013 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2014 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2016 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2018 struct btrfs_super_block, sys_chunk_array_size, 32);
2019 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2020 struct btrfs_super_block, chunk_root_generation, 64);
2021 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2023 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2025 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2026 chunk_root_level, 8);
2027 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2029 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2030 log_root_transid, 64);
2031 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2033 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2035 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2037 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2039 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2041 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2043 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2045 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2046 root_dir_objectid, 64);
2047 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2049 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2051 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2052 compat_ro_flags, 64);
2053 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2054 incompat_flags, 64);
2055 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2057 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2058 cache_generation, 64);
2059 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2060 uuid_tree_generation, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2063 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2065 int t = btrfs_super_csum_type(s);
2066 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2067 return btrfs_csum_sizes[t];
2070 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2072 return offsetof(struct btrfs_leaf, items);
2075 /* struct btrfs_file_extent_item */
2076 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2077 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2079 static inline unsigned long btrfs_file_extent_inline_start(struct
2080 btrfs_file_extent_item *e)
2082 unsigned long offset = (unsigned long)e;
2083 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2087 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2089 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2092 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2094 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2096 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2098 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2100 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2101 disk_num_bytes, 64);
2102 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2104 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2106 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2108 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2110 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2112 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2114 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2116 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2118 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2120 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2121 other_encoding, 16);
2123 /* btrfs_qgroup_status_item */
2124 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2126 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2128 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2130 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2133 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2134 struct btrfs_qgroup_status_item, version, 64);
2135 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2136 struct btrfs_qgroup_status_item, generation, 64);
2137 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2138 struct btrfs_qgroup_status_item, flags, 64);
2139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
2140 struct btrfs_qgroup_status_item, scan, 64);
2142 /* btrfs_qgroup_info_item */
2143 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2145 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2147 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2148 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2149 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2151 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2152 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2154 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2155 struct btrfs_qgroup_info_item, generation, 64);
2156 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2157 struct btrfs_qgroup_info_item, referenced, 64);
2158 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2159 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2160 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2161 struct btrfs_qgroup_info_item, exclusive, 64);
2162 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2163 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2165 /* btrfs_qgroup_limit_item */
2166 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2168 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2169 max_referenced, 64);
2170 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2172 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2173 rsv_referenced, 64);
2174 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2177 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2178 struct btrfs_qgroup_limit_item, flags, 64);
2179 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2180 struct btrfs_qgroup_limit_item, max_referenced, 64);
2181 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2182 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2183 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2184 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2185 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2186 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2189 * this returns the number of bytes used by the item on disk, minus the
2190 * size of any extent headers. If a file is compressed on disk, this is
2191 * the compressed size
2193 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2194 struct btrfs_item *e)
2196 unsigned long offset;
2197 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2198 return btrfs_item_size(eb, e) - offset;
2201 /* this returns the number of file bytes represented by the inline item.
2202 * If an item is compressed, this is the uncompressed size
2204 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2206 struct btrfs_file_extent_item *fi)
2209 * return the space used on disk if this item isn't
2210 * compressed or encoded
2212 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2213 btrfs_file_extent_encryption(eb, fi) == 0 &&
2214 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2215 return btrfs_file_extent_inline_item_len(eb,
2216 btrfs_item_nr(slot));
2219 /* otherwise use the ram bytes field */
2220 return btrfs_file_extent_ram_bytes(eb, fi);
2223 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2225 return root->leafsize;
2226 return root->nodesize;
2229 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2231 struct btrfs_super_block *disk_super;
2232 disk_super = fs_info->super_copy;
2233 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2236 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2238 struct btrfs_super_block *disk_super;
2239 disk_super = fs_info->super_copy;
2240 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2243 /* helper function to cast into the data area of the leaf. */
2244 #define btrfs_item_ptr(leaf, slot, type) \
2245 ((type *)(btrfs_leaf_data(leaf) + \
2246 btrfs_item_offset_nr(leaf, slot)))
2248 #define btrfs_item_ptr_offset(leaf, slot) \
2249 ((unsigned long)(btrfs_leaf_data(leaf) + \
2250 btrfs_item_offset_nr(leaf, slot)))
2253 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2254 struct btrfs_root *root,
2255 u64 num_bytes, u64 empty_size,
2256 u64 hint_byte, u64 search_end,
2257 struct btrfs_key *ins, int data);
2258 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2259 struct btrfs_root *root);
2260 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2261 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2262 u64 bytenr, u64 num_bytes);
2263 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root);
2265 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2266 btrfs_fs_info *info,
2268 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2269 btrfs_fs_info *info,
2271 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2272 struct btrfs_root *root,
2273 u32 blocksize, u64 root_objectid,
2274 struct btrfs_disk_key *key, int level,
2275 u64 hint, u64 empty_size);
2276 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2277 struct btrfs_root *root,
2278 u64 num_bytes, u64 parent,
2279 u64 root_objectid, u64 ref_generation,
2280 u64 owner, u64 empty_size, u64 hint_byte,
2281 u64 search_end, struct btrfs_key *ins, int data);
2282 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2283 struct btrfs_root *root, u64 bytenr,
2284 u64 offset, int metadata, u64 *refs, u64 *flags);
2285 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2286 struct btrfs_root *root,
2287 u64 bytenr, int level, u64 flags);
2288 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2289 struct extent_buffer *buf, int record_parent);
2290 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2291 struct extent_buffer *buf, int record_parent);
2292 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *root,
2294 u64 bytenr, u64 num_bytes, u64 parent,
2295 u64 root_objectid, u64 owner, u64 offset);
2296 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root,
2298 struct extent_io_tree *unpin);
2299 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2300 struct btrfs_root *root,
2301 u64 bytenr, u64 num_bytes, u64 parent,
2302 u64 root_objectid, u64 ref_generation,
2303 u64 owner_objectid);
2304 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *root, u64 bytenr,
2306 u64 orig_parent, u64 parent,
2307 u64 root_objectid, u64 ref_generation,
2308 u64 owner_objectid);
2309 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *root);
2311 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2312 int btrfs_read_block_groups(struct btrfs_root *root);
2313 struct btrfs_block_group_cache *
2314 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2315 u64 chunk_objectid, u64 chunk_offset, u64 size);
2316 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2317 struct btrfs_root *root, u64 bytes_used,
2318 u64 type, u64 chunk_objectid, u64 chunk_offset,
2320 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2321 struct btrfs_root *root);
2322 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root, u64 bytenr, u64 num,
2324 int alloc, int mark_free);
2325 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2326 struct btrfs_root *root, u64 objectid,
2327 struct btrfs_inode_item *inode,
2328 u64 file_pos, u64 disk_bytenr,
2330 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2331 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2333 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2334 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2335 struct btrfs_path *path, int level, int slot);
2336 enum btrfs_tree_block_status
2337 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2338 struct extent_buffer *buf);
2339 enum btrfs_tree_block_status
2340 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2341 struct extent_buffer *buf);
2342 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2343 int level, int slot, u64 objectid);
2344 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2345 struct extent_buffer *parent, int slot);
2346 int btrfs_previous_item(struct btrfs_root *root,
2347 struct btrfs_path *path, u64 min_objectid,
2349 int btrfs_previous_extent_item(struct btrfs_root *root,
2350 struct btrfs_path *path, u64 min_objectid);
2351 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root, struct extent_buffer *buf,
2353 struct extent_buffer *parent, int parent_slot,
2354 struct extent_buffer **cow_ret);
2355 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root,
2357 struct extent_buffer *buf,
2358 struct extent_buffer *parent, int parent_slot,
2359 struct extent_buffer **cow_ret,
2360 u64 search_start, u64 empty_size);
2361 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2362 struct btrfs_root *root,
2363 struct extent_buffer *buf,
2364 struct extent_buffer **cow_ret, u64 new_root_objectid);
2365 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2366 *root, struct btrfs_path *path, u32 data_size);
2367 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2368 struct btrfs_root *root,
2369 struct btrfs_path *path,
2370 u32 new_size, int from_end);
2371 int btrfs_split_item(struct btrfs_trans_handle *trans,
2372 struct btrfs_root *root,
2373 struct btrfs_path *path,
2374 struct btrfs_key *new_key,
2375 unsigned long split_offset);
2376 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2377 *root, struct btrfs_key *key, struct btrfs_path *p, int
2379 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2380 u64 iobjectid, u64 ioff, u8 key_type,
2381 struct btrfs_key *found_key);
2382 void btrfs_release_path(struct btrfs_path *p);
2383 void add_root_to_dirty_list(struct btrfs_root *root);
2384 struct btrfs_path *btrfs_alloc_path(void);
2385 void btrfs_free_path(struct btrfs_path *p);
2386 void btrfs_init_path(struct btrfs_path *p);
2387 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2388 struct btrfs_path *path, int slot, int nr);
2390 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2391 struct btrfs_root *root,
2392 struct btrfs_path *path)
2394 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2397 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2398 *root, struct btrfs_key *key, void *data, u32 data_size);
2399 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2400 struct btrfs_root *root,
2401 struct btrfs_path *path,
2402 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2404 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2405 struct btrfs_root *root,
2406 struct btrfs_path *path,
2407 struct btrfs_key *key,
2410 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2413 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2414 static inline int btrfs_next_item(struct btrfs_root *root,
2415 struct btrfs_path *p)
2418 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2419 return btrfs_next_leaf(root, p);
2423 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2424 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2425 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2426 struct btrfs_disk_key *key, int level);
2427 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2428 struct btrfs_key *new_key);
2429 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2430 struct btrfs_path *path,
2431 struct btrfs_key *new_key);
2434 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2435 struct btrfs_root *tree_root,
2436 u64 root_id, u8 type, u64 ref_id,
2437 u64 dirid, u64 sequence,
2438 const char *name, int name_len);
2439 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2440 *root, struct btrfs_key *key, struct btrfs_root_item
2442 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2443 *root, struct btrfs_key *key, struct btrfs_root_item
2445 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2446 btrfs_root_item *item, struct btrfs_key *key);
2448 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2449 *root, const char *name, int name_len, u64 dir,
2450 struct btrfs_key *location, u8 type, u64 index);
2451 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root,
2453 struct btrfs_path *path, u64 dir,
2454 const char *name, int name_len,
2456 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root,
2458 struct btrfs_path *path, u64 dir,
2459 const char *name, int name_len,
2460 u64 index, int mod);
2461 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2462 struct btrfs_root *root,
2463 struct btrfs_path *path,
2464 struct btrfs_dir_item *di);
2465 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2466 struct btrfs_root *root, const char *name,
2467 u16 name_len, const void *data, u16 data_len,
2470 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *fs_root,
2472 u64 dirid, u64 *objectid);
2475 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root,
2477 const char *name, int name_len,
2478 u64 inode_objectid, u64 ref_objectid, u64 index);
2479 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2480 *root, u64 objectid, struct btrfs_inode_item
2482 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2483 *root, struct btrfs_path *path,
2484 struct btrfs_key *location, int mod);
2485 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2486 *trans, struct btrfs_path *path, struct btrfs_root *root,
2487 u64 ino, u64 parent_ino, u64 index, const char *name,
2488 int namelen, int ins_len);
2489 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2490 struct btrfs_root *root,
2491 const char *name, int name_len,
2492 u64 inode_objectid, u64 ref_objectid,
2494 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root,
2496 const char *name, int name_len,
2497 u64 inode_objectid, u64 ref_objectid, u64 index);
2498 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2499 struct btrfs_root *root, struct btrfs_path *path,
2500 const char *name, int namelen, u64 ino, u64 parent_ino,
2501 u64 index, int ins_len);
2502 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2503 struct btrfs_root *root, const char *name, int name_len,
2504 u64 ino, u64 parent_ino, u64 *index);
2507 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root, u64 bytenr, u64 len);
2509 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root,
2511 u64 objectid, u64 pos, u64 offset,
2514 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root, u64 objectid,
2516 u64 offset, char *buffer, size_t size);
2517 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2518 struct btrfs_root *root, u64 alloc_end,
2519 u64 bytenr, char *data, size_t len);
2520 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2521 struct btrfs_root *root, struct btrfs_path *path,
2525 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2526 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2529 static inline int is_fstree(u64 rootid)
2531 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2532 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2538 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2539 u64 dir, u64 index);
2540 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2542 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2543 u64 ino, u64 parent_ino, char *name, int namelen,
2544 u8 type, u64 *index, int add_backref);
2545 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2546 u64 ino, u64 parent_ino, u64 index, const char *name,
2547 int namelen, int add_orphan);
2548 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2549 struct btrfs_root *root, struct btrfs_path *path,
2551 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2552 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2555 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2556 struct btrfs_root *root,
2557 struct btrfs_path *path,
2558 u64 ino, u64 offset, u64 len, int ins_len);
2559 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root,
2561 u64 ino, u64 offset, u64 len);