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 corresponds 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 allow 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->nodesize))
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;
431 /* Unused and must be equal to nodesize */
434 __le32 sys_chunk_array_size;
435 __le64 chunk_root_generation;
437 __le64 compat_ro_flags;
438 __le64 incompat_flags;
443 struct btrfs_dev_item dev_item;
445 char label[BTRFS_LABEL_SIZE];
447 __le64 cache_generation;
448 __le64 uuid_tree_generation;
450 /* future expansion */
452 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
453 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
454 } __attribute__ ((__packed__));
457 * Compat flags that we support. If any incompat flags are set other than the
458 * ones specified below then we will fail to mount
460 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
462 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
463 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
464 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
465 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
468 * some patches floated around with a second compression method
469 * lets save that incompat here for when they do get in
470 * Note we don't actually support it, we're just reserving the
473 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
476 * older kernels tried to do bigger metadata blocks, but the
477 * code was pretty buggy. Lets not let them try anymore.
479 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
480 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
481 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
482 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
483 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
485 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
487 #define BTRFS_FEATURE_COMPAT_RO_SUPP \
488 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
490 #define BTRFS_FEATURE_INCOMPAT_SUPP \
491 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
492 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
493 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
494 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
495 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
496 BTRFS_FEATURE_INCOMPAT_RAID56 | \
497 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
498 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
499 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
502 * A leaf is full of items. offset and size tell us where to find
503 * the item in the leaf (relative to the start of the data area)
506 struct btrfs_disk_key key;
509 } __attribute__ ((__packed__));
512 * leaves have an item area and a data area:
513 * [item0, item1....itemN] [free space] [dataN...data1, data0]
515 * The data is separate from the items to get the keys closer together
519 struct btrfs_header header;
520 struct btrfs_item items[];
521 } __attribute__ ((__packed__));
524 * all non-leaf blocks are nodes, they hold only keys and pointers to
527 struct btrfs_key_ptr {
528 struct btrfs_disk_key key;
531 } __attribute__ ((__packed__));
534 struct btrfs_header header;
535 struct btrfs_key_ptr ptrs[];
536 } __attribute__ ((__packed__));
539 * btrfs_paths remember the path taken from the root down to the leaf.
540 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
541 * to any other levels that are present.
543 * The slots array records the index of the item or block pointer
544 * used while walking the tree.
548 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
549 int slots[BTRFS_MAX_LEVEL];
550 /* if there is real range locking, this locks field will change */
551 int locks[BTRFS_MAX_LEVEL];
553 /* keep some upper locks as we walk down */
557 * set by btrfs_split_item, tells search_slot to keep all locks
558 * and to force calls to keep space in the nodes
560 unsigned int search_for_split:1;
561 unsigned int skip_check_block:1;
565 * items in the extent btree are used to record the objectid of the
566 * owner of the block and the number of references
569 struct btrfs_extent_item {
573 } __attribute__ ((__packed__));
575 struct btrfs_extent_item_v0 {
577 } __attribute__ ((__packed__));
579 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
580 sizeof(struct btrfs_item))
581 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
583 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
584 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
586 /* following flags only apply to tree blocks */
588 /* use full backrefs for extent pointers in the block*/
589 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
591 struct btrfs_tree_block_info {
592 struct btrfs_disk_key key;
594 } __attribute__ ((__packed__));
596 struct btrfs_extent_data_ref {
601 } __attribute__ ((__packed__));
603 struct btrfs_shared_data_ref {
605 } __attribute__ ((__packed__));
607 struct btrfs_extent_inline_ref {
610 } __attribute__ ((__packed__));
612 struct btrfs_extent_ref_v0 {
617 } __attribute__ ((__packed__));
619 /* dev extents record free space on individual devices. The owner
620 * field points back to the chunk allocation mapping tree that allocated
621 * the extent. The chunk tree uuid field is a way to double check the owner
623 struct btrfs_dev_extent {
625 __le64 chunk_objectid;
628 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
629 } __attribute__ ((__packed__));
631 struct btrfs_inode_ref {
635 } __attribute__ ((__packed__));
637 struct btrfs_inode_extref {
638 __le64 parent_objectid;
641 __u8 name[0]; /* name goes here */
642 } __attribute__ ((__packed__));
644 struct btrfs_timespec {
647 } __attribute__ ((__packed__));
650 BTRFS_COMPRESS_NONE = 0,
651 BTRFS_COMPRESS_ZLIB = 1,
652 BTRFS_COMPRESS_LZO = 2,
653 BTRFS_COMPRESS_TYPES = 2,
654 BTRFS_COMPRESS_LAST = 3,
655 } btrfs_compression_type;
657 /* we don't understand any encryption methods right now */
659 BTRFS_ENCRYPTION_NONE = 0,
660 BTRFS_ENCRYPTION_LAST = 1,
661 } btrfs_encryption_type;
663 enum btrfs_tree_block_status {
664 BTRFS_TREE_BLOCK_CLEAN,
665 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
666 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
667 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
668 BTRFS_TREE_BLOCK_INVALID_LEVEL,
669 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
670 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
673 struct btrfs_inode_item {
674 /* nfs style generation number */
676 /* transid that last touched this inode */
688 /* modification sequence number for NFS */
692 * a little future expansion, for more than this we can
693 * just grow the inode item and version it
696 struct btrfs_timespec atime;
697 struct btrfs_timespec ctime;
698 struct btrfs_timespec mtime;
699 struct btrfs_timespec otime;
700 } __attribute__ ((__packed__));
702 struct btrfs_dir_log_item {
704 } __attribute__ ((__packed__));
706 struct btrfs_dir_item {
707 struct btrfs_disk_key location;
712 } __attribute__ ((__packed__));
714 struct btrfs_root_item_v0 {
715 struct btrfs_inode_item inode;
721 __le64 last_snapshot;
724 struct btrfs_disk_key drop_progress;
727 } __attribute__ ((__packed__));
729 struct btrfs_root_item {
730 struct btrfs_inode_item inode;
736 __le64 last_snapshot;
739 struct btrfs_disk_key drop_progress;
744 * The following fields appear after subvol_uuids+subvol_times
749 * This generation number is used to test if the new fields are valid
750 * and up to date while reading the root item. Every time the root item
751 * is written out, the "generation" field is copied into this field. If
752 * anyone ever mounted the fs with an older kernel, we will have
753 * mismatching generation values here and thus must invalidate the
754 * new fields. See btrfs_update_root and btrfs_find_last_root for
756 * the offset of generation_v2 is also used as the start for the memset
757 * when invalidating the fields.
759 __le64 generation_v2;
760 u8 uuid[BTRFS_UUID_SIZE];
761 u8 parent_uuid[BTRFS_UUID_SIZE];
762 u8 received_uuid[BTRFS_UUID_SIZE];
763 __le64 ctransid; /* updated when an inode changes */
764 __le64 otransid; /* trans when created */
765 __le64 stransid; /* trans when sent. non-zero for received subvol */
766 __le64 rtransid; /* trans when received. non-zero for received subvol */
767 struct btrfs_timespec ctime;
768 struct btrfs_timespec otime;
769 struct btrfs_timespec stime;
770 struct btrfs_timespec rtime;
771 __le64 reserved[8]; /* for future */
772 } __attribute__ ((__packed__));
775 * this is used for both forward and backward root refs
777 struct btrfs_root_ref {
781 } __attribute__ ((__packed__));
783 #define BTRFS_FILE_EXTENT_INLINE 0
784 #define BTRFS_FILE_EXTENT_REG 1
785 #define BTRFS_FILE_EXTENT_PREALLOC 2
787 struct btrfs_file_extent_item {
789 * transaction id that created this extent
793 * max number of bytes to hold this extent in ram
794 * when we split a compressed extent we can't know how big
795 * each of the resulting pieces will be. So, this is
796 * an upper limit on the size of the extent in ram instead of
802 * 32 bits for the various ways we might encode the data,
803 * including compression and encryption. If any of these
804 * are set to something a given disk format doesn't understand
805 * it is treated like an incompat flag for reading and writing,
810 __le16 other_encoding; /* spare for later use */
812 /* are we inline data or a real extent? */
816 * disk space consumed by the extent, checksum blocks are included
820 __le64 disk_num_bytes;
822 * the logical offset in file blocks (no csums)
823 * this extent record is for. This allows a file extent to point
824 * into the middle of an existing extent on disk, sharing it
825 * between two snapshots (useful if some bytes in the middle of the
826 * extent have changed
830 * the logical number of file blocks (no csums included)
834 } __attribute__ ((__packed__));
836 struct btrfs_csum_item {
838 } __attribute__ ((__packed__));
841 * We don't want to overwrite 1M at the beginning of device, even though
842 * there is our 1st superblock at 64k. Some possible reasons:
843 * - the first 64k blank is useful for some boot loader/manager
844 * - the first 1M could be scratched by buggy partitioner or somesuch
846 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
848 /* tag for the radix tree of block groups in ram */
849 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
850 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
851 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
852 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
853 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
854 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
855 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
856 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
857 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
858 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
859 #define BTRFS_NR_RAID_TYPES 7
861 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
862 BTRFS_BLOCK_GROUP_SYSTEM | \
863 BTRFS_BLOCK_GROUP_METADATA)
865 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
866 BTRFS_BLOCK_GROUP_RAID1 | \
867 BTRFS_BLOCK_GROUP_RAID5 | \
868 BTRFS_BLOCK_GROUP_RAID6 | \
869 BTRFS_BLOCK_GROUP_DUP | \
870 BTRFS_BLOCK_GROUP_RAID10)
872 /* used in struct btrfs_balance_args fields */
873 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
876 * GLOBAL_RSV does not exist as a on-disk block group type and is used
877 * internally for exporting info about global block reserve from space infos
879 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
881 #define BTRFS_QGROUP_LEVEL_SHIFT 48
883 static inline u64 btrfs_qgroup_level(u64 qgroupid)
885 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
888 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
890 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
893 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
894 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
895 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
897 struct btrfs_qgroup_status_item {
901 __le64 scan; /* progress during scanning */
902 } __attribute__ ((__packed__));
904 struct btrfs_block_group_item {
906 __le64 chunk_objectid;
908 } __attribute__ ((__packed__));
910 struct btrfs_free_space_info {
913 } __attribute__ ((__packed__));
915 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
917 struct btrfs_qgroup_info_item {
920 __le64 referenced_compressed;
922 __le64 exclusive_compressed;
923 } __attribute__ ((__packed__));
925 /* flags definition for qgroup limits */
926 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
927 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
928 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
929 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
930 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
931 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
933 struct btrfs_qgroup_limit_item {
935 __le64 max_referenced;
936 __le64 max_exclusive;
937 __le64 rsv_referenced;
938 __le64 rsv_exclusive;
939 } __attribute__ ((__packed__));
941 struct btrfs_space_info {
947 struct list_head list;
950 struct btrfs_block_group_cache {
951 struct cache_extent cache;
952 struct btrfs_key key;
953 struct btrfs_block_group_item item;
954 struct btrfs_space_info *space_info;
955 struct btrfs_free_space_ctl *free_space_ctl;
963 struct btrfs_extent_ops {
964 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
965 u64 hint_byte, struct btrfs_key *ins, int metadata);
966 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
971 struct btrfs_fs_devices;
972 struct btrfs_fs_info {
973 u8 fsid[BTRFS_FSID_SIZE];
975 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
976 u8 *new_chunk_tree_uuid;
977 struct btrfs_root *fs_root;
978 struct btrfs_root *extent_root;
979 struct btrfs_root *tree_root;
980 struct btrfs_root *chunk_root;
981 struct btrfs_root *dev_root;
982 struct btrfs_root *csum_root;
983 struct btrfs_root *quota_root;
984 struct btrfs_root *free_space_root;
986 struct rb_root fs_root_tree;
988 /* the log root tree is a directory of all the other log roots */
989 struct btrfs_root *log_root_tree;
991 struct extent_io_tree extent_cache;
992 struct extent_io_tree free_space_cache;
993 struct extent_io_tree block_group_cache;
994 struct extent_io_tree pinned_extents;
995 struct extent_io_tree pending_del;
996 struct extent_io_tree extent_ins;
997 struct extent_io_tree *excluded_extents;
999 /* logical->physical extent mapping */
1000 struct btrfs_mapping_tree mapping_tree;
1003 u64 last_trans_committed;
1005 u64 avail_data_alloc_bits;
1006 u64 avail_metadata_alloc_bits;
1007 u64 avail_system_alloc_bits;
1008 u64 data_alloc_profile;
1009 u64 metadata_alloc_profile;
1010 u64 system_alloc_profile;
1013 struct btrfs_trans_handle *running_transaction;
1014 struct btrfs_super_block *super_copy;
1015 struct mutex fs_mutex;
1020 struct btrfs_extent_ops *extent_ops;
1021 struct list_head dirty_cowonly_roots;
1022 struct list_head recow_ebs;
1024 struct btrfs_fs_devices *fs_devices;
1025 struct list_head space_info;
1028 unsigned int readonly:1;
1029 unsigned int on_restoring:1;
1030 unsigned int is_chunk_recover:1;
1031 unsigned int quota_enabled:1;
1032 unsigned int suppress_check_block_errors:1;
1033 unsigned int ignore_fsid_mismatch:1;
1034 unsigned int ignore_chunk_tree_error:1;
1035 unsigned int avoid_meta_chunk_alloc:1;
1036 unsigned int avoid_sys_chunk_alloc:1;
1038 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1039 struct btrfs_root *root,
1040 u64 bytenr, u64 num_bytes, u64 parent,
1041 u64 root_objectid, u64 owner, u64 offset,
1043 struct cache_tree *fsck_extent_cache;
1044 struct cache_tree *corrupt_blocks;
1049 * in ram representation of the tree. extent_root is used for all allocations
1050 * and for the extent tree extent_root root.
1053 struct extent_buffer *node;
1054 struct extent_buffer *commit_root;
1055 struct btrfs_root_item root_item;
1056 struct btrfs_key root_key;
1057 struct btrfs_fs_info *fs_info;
1061 /* data allocations are done in sectorsize units */
1064 /* node allocations are done in nodesize units */
1067 /* Unused, equal to nodesize */
1070 /* leaf allocations are done in nodesize units */
1079 u64 last_inode_alloc;
1082 * Record orphan data extent ref
1084 * TODO: Don't restore things in btrfs_root.
1085 * Directly record it into inode_record, which needs a lot of
1086 * infrastructure change to allow cooperation between extent
1089 struct list_head orphan_data_extents;
1091 /* the dirty list is only used by non-reference counted roots */
1092 struct list_head dirty_list;
1093 struct rb_node rb_node;
1097 * inode items have the data typically returned from stat and store other
1098 * info about object characteristics. There is one for every file and dir in
1101 #define BTRFS_INODE_ITEM_KEY 1
1102 #define BTRFS_INODE_REF_KEY 12
1103 #define BTRFS_INODE_EXTREF_KEY 13
1104 #define BTRFS_XATTR_ITEM_KEY 24
1105 #define BTRFS_ORPHAN_ITEM_KEY 48
1107 #define BTRFS_DIR_LOG_ITEM_KEY 60
1108 #define BTRFS_DIR_LOG_INDEX_KEY 72
1110 * dir items are the name -> inode pointers in a directory. There is one
1111 * for every name in a directory.
1113 #define BTRFS_DIR_ITEM_KEY 84
1114 #define BTRFS_DIR_INDEX_KEY 96
1117 * extent data is for file data
1119 #define BTRFS_EXTENT_DATA_KEY 108
1122 * csum items have the checksums for data in the extents
1124 #define BTRFS_CSUM_ITEM_KEY 120
1126 * extent csums are stored in a separate tree and hold csums for
1127 * an entire extent on disk.
1129 #define BTRFS_EXTENT_CSUM_KEY 128
1132 * root items point to tree roots. There are typically in the root
1133 * tree used by the super block to find all the other trees
1135 #define BTRFS_ROOT_ITEM_KEY 132
1138 * root backrefs tie subvols and snapshots to the directory entries that
1141 #define BTRFS_ROOT_BACKREF_KEY 144
1144 * root refs make a fast index for listing all of the snapshots and
1145 * subvolumes referenced by a given root. They point directly to the
1146 * directory item in the root that references the subvol
1148 #define BTRFS_ROOT_REF_KEY 156
1151 * extent items are in the extent map tree. These record which blocks
1152 * are used, and how many references there are to each block
1154 #define BTRFS_EXTENT_ITEM_KEY 168
1157 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1158 * the length, so we save the level in key->offset instead of the length.
1160 #define BTRFS_METADATA_ITEM_KEY 169
1162 #define BTRFS_TREE_BLOCK_REF_KEY 176
1164 #define BTRFS_EXTENT_DATA_REF_KEY 178
1166 /* old style extent backrefs */
1167 #define BTRFS_EXTENT_REF_V0_KEY 180
1169 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1171 #define BTRFS_SHARED_DATA_REF_KEY 184
1175 * block groups give us hints into the extent allocation trees. Which
1176 * blocks are free etc etc
1178 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1181 * Every block group is represented in the free space tree by a free space info
1182 * item, which stores some accounting information. It is keyed on
1183 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1185 #define BTRFS_FREE_SPACE_INFO_KEY 198
1188 * A free space extent tracks an extent of space that is free in a block group.
1189 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1191 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1194 * When a block group becomes very fragmented, we convert it to use bitmaps
1195 * instead of extents. A free space bitmap is keyed on
1196 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1197 * (length / sectorsize) bits.
1199 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1201 #define BTRFS_DEV_EXTENT_KEY 204
1202 #define BTRFS_DEV_ITEM_KEY 216
1203 #define BTRFS_CHUNK_ITEM_KEY 228
1205 #define BTRFS_BALANCE_ITEM_KEY 248
1210 #define BTRFS_QGROUP_STATUS_KEY 240
1211 #define BTRFS_QGROUP_INFO_KEY 242
1212 #define BTRFS_QGROUP_LIMIT_KEY 244
1213 #define BTRFS_QGROUP_RELATION_KEY 246
1216 * Persistently stores the io stats in the device tree.
1217 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1219 #define BTRFS_DEV_STATS_KEY 249
1222 * Persistently stores the device replace state in the device tree.
1223 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1225 #define BTRFS_DEV_REPLACE_KEY 250
1228 * Stores items that allow to quickly map UUIDs to something else.
1229 * These items are part of the filesystem UUID tree.
1230 * The key is built like this:
1231 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1233 #if BTRFS_UUID_SIZE != 16
1234 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1236 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1237 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1238 * received subvols */
1241 * string items are for debugging. They just store a short string of
1244 #define BTRFS_STRING_ITEM_KEY 253
1248 #define BTRFS_INODE_NODATASUM (1 << 0)
1249 #define BTRFS_INODE_NODATACOW (1 << 1)
1250 #define BTRFS_INODE_READONLY (1 << 2)
1252 #define read_eb_member(eb, ptr, type, member, result) ( \
1253 read_extent_buffer(eb, (char *)(result), \
1254 ((unsigned long)(ptr)) + \
1255 offsetof(type, member), \
1256 sizeof(((type *)0)->member)))
1258 #define write_eb_member(eb, ptr, type, member, result) ( \
1259 write_extent_buffer(eb, (char *)(result), \
1260 ((unsigned long)(ptr)) + \
1261 offsetof(type, member), \
1262 sizeof(((type *)0)->member)))
1264 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1265 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1267 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1268 return le##bits##_to_cpu(h->member); \
1270 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1273 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1274 h->member = cpu_to_le##bits(val); \
1277 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1278 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1281 unsigned long offset = (unsigned long)s; \
1282 const type *p = (type *) (eb->data + offset); \
1283 return get_unaligned_le##bits(&p->member); \
1285 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1286 type *s, u##bits val) \
1288 unsigned long offset = (unsigned long)s; \
1289 type *p = (type *) (eb->data + offset); \
1290 put_unaligned_le##bits(val, &p->member); \
1293 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1294 static inline u##bits btrfs_##name(const type *s) \
1296 return le##bits##_to_cpu(s->member); \
1298 static inline void btrfs_set_##name(type *s, u##bits val) \
1300 s->member = cpu_to_le##bits(val); \
1303 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1304 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1305 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1306 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1307 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1308 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1310 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1311 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1312 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1313 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1314 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1315 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1317 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1318 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1320 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1322 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1324 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1326 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1328 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1329 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1331 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1333 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1335 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1338 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1340 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1343 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1345 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1348 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1349 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1350 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1351 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1352 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1353 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1354 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1355 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1356 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1357 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1358 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1360 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1362 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1366 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1369 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1371 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1373 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1376 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1378 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1380 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1381 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1383 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1386 unsigned long offset = (unsigned long)c;
1387 offset += offsetof(struct btrfs_chunk, stripe);
1388 offset += nr * sizeof(struct btrfs_stripe);
1389 return (struct btrfs_stripe *)offset;
1392 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1394 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1397 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1398 struct btrfs_chunk *c, int nr)
1400 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1403 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1404 struct btrfs_chunk *c, int nr,
1407 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1410 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1411 struct btrfs_chunk *c, int nr)
1413 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1416 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1417 struct btrfs_chunk *c, int nr,
1420 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1423 /* struct btrfs_block_group_item */
1424 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1426 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1428 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1429 struct btrfs_block_group_item, chunk_objectid, 64);
1431 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1432 struct btrfs_block_group_item, chunk_objectid, 64);
1433 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1434 struct btrfs_block_group_item, flags, 64);
1435 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1436 struct btrfs_block_group_item, flags, 64);
1438 /* struct btrfs_free_space_info */
1439 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1441 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1443 /* struct btrfs_inode_ref */
1444 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1445 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1446 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1448 /* struct btrfs_inode_extref */
1449 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1450 parent_objectid, 64);
1451 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1453 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1455 /* struct btrfs_inode_item */
1456 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1457 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1458 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1459 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1460 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1461 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1462 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1463 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1464 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1465 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1466 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1467 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1470 struct btrfs_inode_item, generation, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1472 struct btrfs_inode_item, sequence, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1474 struct btrfs_inode_item, transid, 64);
1475 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1476 struct btrfs_inode_item, size, 64);
1477 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1478 struct btrfs_inode_item, nbytes, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1480 struct btrfs_inode_item, block_group, 64);
1481 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1482 struct btrfs_inode_item, nlink, 32);
1483 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1484 struct btrfs_inode_item, uid, 32);
1485 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1486 struct btrfs_inode_item, gid, 32);
1487 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1488 struct btrfs_inode_item, mode, 32);
1489 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1490 struct btrfs_inode_item, rdev, 64);
1491 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1492 struct btrfs_inode_item, flags, 64);
1494 static inline struct btrfs_timespec *
1495 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1497 unsigned long ptr = (unsigned long)inode_item;
1498 ptr += offsetof(struct btrfs_inode_item, atime);
1499 return (struct btrfs_timespec *)ptr;
1502 static inline struct btrfs_timespec *
1503 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1505 unsigned long ptr = (unsigned long)inode_item;
1506 ptr += offsetof(struct btrfs_inode_item, mtime);
1507 return (struct btrfs_timespec *)ptr;
1510 static inline struct btrfs_timespec *
1511 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1513 unsigned long ptr = (unsigned long)inode_item;
1514 ptr += offsetof(struct btrfs_inode_item, ctime);
1515 return (struct btrfs_timespec *)ptr;
1518 static inline struct btrfs_timespec *
1519 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1521 unsigned long ptr = (unsigned long)inode_item;
1522 ptr += offsetof(struct btrfs_inode_item, otime);
1523 return (struct btrfs_timespec *)ptr;
1526 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1527 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1528 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1530 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1533 /* struct btrfs_dev_extent */
1534 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1536 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1537 chunk_objectid, 64);
1538 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1540 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1542 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1545 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1547 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1548 return (u8 *)((unsigned long)dev + ptr);
1552 /* struct btrfs_extent_item */
1553 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1554 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1555 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1557 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1558 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1560 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1562 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1564 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1565 struct btrfs_tree_block_info *item,
1566 struct btrfs_disk_key *key)
1568 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1571 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1572 struct btrfs_tree_block_info *item,
1573 struct btrfs_disk_key *key)
1575 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1578 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1580 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1582 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1584 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1587 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1590 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1592 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1594 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1595 struct btrfs_extent_inline_ref, type, 8);
1596 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1597 struct btrfs_extent_inline_ref, offset, 64);
1599 static inline u32 btrfs_extent_inline_ref_size(int type)
1601 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1602 type == BTRFS_SHARED_BLOCK_REF_KEY)
1603 return sizeof(struct btrfs_extent_inline_ref);
1604 if (type == BTRFS_SHARED_DATA_REF_KEY)
1605 return sizeof(struct btrfs_shared_data_ref) +
1606 sizeof(struct btrfs_extent_inline_ref);
1607 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1608 return sizeof(struct btrfs_extent_data_ref) +
1609 offsetof(struct btrfs_extent_inline_ref, offset);
1614 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1615 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1617 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1618 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1620 /* struct btrfs_node */
1621 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1622 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1624 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1627 ptr = offsetof(struct btrfs_node, ptrs) +
1628 sizeof(struct btrfs_key_ptr) * nr;
1629 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1632 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1636 ptr = offsetof(struct btrfs_node, ptrs) +
1637 sizeof(struct btrfs_key_ptr) * nr;
1638 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1641 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1644 ptr = offsetof(struct btrfs_node, ptrs) +
1645 sizeof(struct btrfs_key_ptr) * nr;
1646 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1649 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1653 ptr = offsetof(struct btrfs_node, ptrs) +
1654 sizeof(struct btrfs_key_ptr) * nr;
1655 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1658 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1660 return offsetof(struct btrfs_node, ptrs) +
1661 sizeof(struct btrfs_key_ptr) * nr;
1664 static inline void btrfs_node_key(struct extent_buffer *eb,
1665 struct btrfs_disk_key *disk_key, int nr)
1668 ptr = btrfs_node_key_ptr_offset(nr);
1669 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1670 struct btrfs_key_ptr, key, disk_key);
1673 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1674 struct btrfs_disk_key *disk_key, int nr)
1677 ptr = btrfs_node_key_ptr_offset(nr);
1678 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1679 struct btrfs_key_ptr, key, disk_key);
1682 /* struct btrfs_item */
1683 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1684 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1686 static inline unsigned long btrfs_item_nr_offset(int nr)
1688 return offsetof(struct btrfs_leaf, items) +
1689 sizeof(struct btrfs_item) * nr;
1692 static inline struct btrfs_item *btrfs_item_nr(int nr)
1694 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1697 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1698 struct btrfs_item *item)
1700 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1703 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1705 return btrfs_item_end(eb, btrfs_item_nr(nr));
1708 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1710 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1713 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1715 return btrfs_item_size(eb, btrfs_item_nr(nr));
1718 static inline void btrfs_item_key(struct extent_buffer *eb,
1719 struct btrfs_disk_key *disk_key, int nr)
1721 struct btrfs_item *item = btrfs_item_nr(nr);
1722 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1725 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1726 struct btrfs_disk_key *disk_key, int nr)
1728 struct btrfs_item *item = btrfs_item_nr(nr);
1729 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1732 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1735 * struct btrfs_root_ref
1737 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1738 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1739 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1741 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1742 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1743 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1745 /* struct btrfs_dir_item */
1746 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1747 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1748 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1749 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1751 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1753 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1754 struct btrfs_dir_item *item,
1755 struct btrfs_disk_key *key)
1757 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1760 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1761 struct btrfs_dir_item *item,
1762 struct btrfs_disk_key *key)
1764 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1767 /* struct btrfs_free_space_header */
1768 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1770 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1772 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1775 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1776 struct btrfs_free_space_header *h,
1777 struct btrfs_disk_key *key)
1779 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1782 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1783 struct btrfs_free_space_header *h,
1784 struct btrfs_disk_key *key)
1786 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1789 /* struct btrfs_disk_key */
1790 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1792 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1793 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1795 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1796 struct btrfs_disk_key *disk)
1798 cpu->offset = le64_to_cpu(disk->offset);
1799 cpu->type = disk->type;
1800 cpu->objectid = le64_to_cpu(disk->objectid);
1803 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1804 struct btrfs_key *cpu)
1806 disk->offset = cpu_to_le64(cpu->offset);
1807 disk->type = cpu->type;
1808 disk->objectid = cpu_to_le64(cpu->objectid);
1811 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1812 struct btrfs_key *key, int nr)
1814 struct btrfs_disk_key disk_key;
1815 btrfs_node_key(eb, &disk_key, nr);
1816 btrfs_disk_key_to_cpu(key, &disk_key);
1819 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1820 struct btrfs_key *key, int nr)
1822 struct btrfs_disk_key disk_key;
1823 btrfs_item_key(eb, &disk_key, nr);
1824 btrfs_disk_key_to_cpu(key, &disk_key);
1827 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1828 struct btrfs_dir_item *item,
1829 struct btrfs_key *key)
1831 struct btrfs_disk_key disk_key;
1832 btrfs_dir_item_key(eb, item, &disk_key);
1833 btrfs_disk_key_to_cpu(key, &disk_key);
1837 static inline u8 btrfs_key_type(struct btrfs_key *key)
1842 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1847 /* struct btrfs_header */
1848 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1849 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1851 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1852 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1853 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1854 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1855 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1856 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1858 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1859 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1862 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1864 return (btrfs_header_flags(eb) & flag) == flag;
1867 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1869 u64 flags = btrfs_header_flags(eb);
1870 btrfs_set_header_flags(eb, flags | flag);
1871 return (flags & flag) == flag;
1874 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1876 u64 flags = btrfs_header_flags(eb);
1877 btrfs_set_header_flags(eb, flags & ~flag);
1878 return (flags & flag) == flag;
1881 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1883 u64 flags = btrfs_header_flags(eb);
1884 return flags >> BTRFS_BACKREF_REV_SHIFT;
1887 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1890 u64 flags = btrfs_header_flags(eb);
1891 flags &= ~BTRFS_BACKREF_REV_MASK;
1892 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1893 btrfs_set_header_flags(eb, flags);
1896 static inline unsigned long btrfs_header_fsid(void)
1898 return offsetof(struct btrfs_header, fsid);
1901 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1903 return offsetof(struct btrfs_header, chunk_tree_uuid);
1906 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1908 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1912 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1914 unsigned long ptr = offsetof(struct btrfs_header, csum);
1918 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1923 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1928 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1933 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1935 return (btrfs_header_level(eb) == 0);
1938 /* struct btrfs_root_item */
1939 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1941 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1942 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1943 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1945 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1947 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1948 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1949 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1950 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1951 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1952 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1953 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1954 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1956 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1958 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1960 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1962 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1964 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1967 /* struct btrfs_root_backup */
1968 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1970 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1972 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1973 tree_root_level, 8);
1975 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1977 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1978 chunk_root_gen, 64);
1979 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1980 chunk_root_level, 8);
1982 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1984 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1985 extent_root_gen, 64);
1986 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1987 extent_root_level, 8);
1989 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1991 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1993 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1996 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1998 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2000 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2003 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2005 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2008 csum_root_level, 8);
2009 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2011 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2013 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2016 /* struct btrfs_super_block */
2018 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2020 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2022 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2023 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2024 struct btrfs_super_block, sys_chunk_array_size, 32);
2025 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2026 struct btrfs_super_block, chunk_root_generation, 64);
2027 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2029 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2031 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2032 chunk_root_level, 8);
2033 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2035 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2036 log_root_transid, 64);
2037 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2039 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2041 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2043 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2045 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2047 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2049 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2051 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2052 root_dir_objectid, 64);
2053 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2055 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2057 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2058 compat_ro_flags, 64);
2059 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2060 incompat_flags, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2063 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2064 cache_generation, 64);
2065 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2066 uuid_tree_generation, 64);
2067 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2069 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2071 int t = btrfs_super_csum_type(s);
2072 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2073 return btrfs_csum_sizes[t];
2076 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2078 return offsetof(struct btrfs_leaf, items);
2081 /* struct btrfs_file_extent_item */
2082 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2083 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2085 static inline unsigned long btrfs_file_extent_inline_start(struct
2086 btrfs_file_extent_item *e)
2088 unsigned long offset = (unsigned long)e;
2089 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2093 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2095 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2098 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2100 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2102 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2104 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2106 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2107 disk_num_bytes, 64);
2108 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2110 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2112 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2114 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2116 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2118 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2120 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2122 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2124 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2126 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2127 other_encoding, 16);
2129 /* btrfs_qgroup_status_item */
2130 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2132 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2134 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2136 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2140 struct btrfs_qgroup_status_item, version, 64);
2141 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2142 struct btrfs_qgroup_status_item, generation, 64);
2143 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2144 struct btrfs_qgroup_status_item, flags, 64);
2145 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
2146 struct btrfs_qgroup_status_item, scan, 64);
2148 /* btrfs_qgroup_info_item */
2149 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2151 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2153 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2154 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2155 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2157 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2158 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2160 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2161 struct btrfs_qgroup_info_item, generation, 64);
2162 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2163 struct btrfs_qgroup_info_item, referenced, 64);
2164 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2165 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2166 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2167 struct btrfs_qgroup_info_item, exclusive, 64);
2168 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2169 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2171 /* btrfs_qgroup_limit_item */
2172 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2174 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2175 max_referenced, 64);
2176 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2178 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2179 rsv_referenced, 64);
2180 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2183 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2184 struct btrfs_qgroup_limit_item, flags, 64);
2185 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2186 struct btrfs_qgroup_limit_item, max_referenced, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2188 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2190 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2191 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2192 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2195 * this returns the number of bytes used by the item on disk, minus the
2196 * size of any extent headers. If a file is compressed on disk, this is
2197 * the compressed size
2199 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2200 struct btrfs_item *e)
2202 unsigned long offset;
2203 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2204 return btrfs_item_size(eb, e) - offset;
2207 /* struct btrfs_ioctl_search_header */
2208 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2210 return get_unaligned_64(&sh->transid);
2213 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2215 return get_unaligned_64(&sh->objectid);
2218 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2220 return get_unaligned_64(&sh->offset);
2223 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2225 return get_unaligned_32(&sh->type);
2228 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2230 return get_unaligned_32(&sh->len);
2233 /* this returns the number of file bytes represented by the inline item.
2234 * If an item is compressed, this is the uncompressed size
2236 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2238 struct btrfs_file_extent_item *fi)
2241 * return the space used on disk if this item isn't
2242 * compressed or encoded
2244 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2245 btrfs_file_extent_encryption(eb, fi) == 0 &&
2246 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2247 return btrfs_file_extent_inline_item_len(eb,
2248 btrfs_item_nr(slot));
2251 /* otherwise use the ram bytes field */
2252 return btrfs_file_extent_ram_bytes(eb, fi);
2256 * NOTE: Backward compatibility, do not use.
2257 * Replacement: read nodesize directly
2259 __attribute__((deprecated))
2260 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2262 return root->leafsize;
2263 return root->nodesize;
2266 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2268 struct btrfs_super_block *disk_super;
2269 disk_super = fs_info->super_copy;
2270 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2273 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2275 struct btrfs_super_block *disk_super;
2276 disk_super = fs_info->super_copy;
2277 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2280 /* helper function to cast into the data area of the leaf. */
2281 #define btrfs_item_ptr(leaf, slot, type) \
2282 ((type *)(btrfs_leaf_data(leaf) + \
2283 btrfs_item_offset_nr(leaf, slot)))
2285 #define btrfs_item_ptr_offset(leaf, slot) \
2286 ((unsigned long)(btrfs_leaf_data(leaf) + \
2287 btrfs_item_offset_nr(leaf, slot)))
2290 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2291 struct btrfs_root *root,
2292 u64 num_bytes, u64 empty_size,
2293 u64 hint_byte, u64 search_end,
2294 struct btrfs_key *ins, int data);
2295 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2296 struct btrfs_root *root);
2297 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2298 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2299 u64 bytenr, u64 num_bytes);
2300 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2301 struct btrfs_root *root);
2302 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2303 btrfs_fs_info *info,
2305 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2306 btrfs_fs_info *info,
2308 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2309 struct btrfs_root *root,
2310 u32 blocksize, u64 root_objectid,
2311 struct btrfs_disk_key *key, int level,
2312 u64 hint, u64 empty_size);
2313 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2314 struct btrfs_root *root,
2315 u64 num_bytes, u64 parent,
2316 u64 root_objectid, u64 ref_generation,
2317 u64 owner, u64 empty_size, u64 hint_byte,
2318 u64 search_end, struct btrfs_key *ins, int data);
2319 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2320 struct btrfs_root *root, u64 bytenr,
2321 u64 offset, int metadata, u64 *refs, u64 *flags);
2322 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root,
2324 u64 bytenr, int level, u64 flags);
2325 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2326 struct extent_buffer *buf, int record_parent);
2327 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2328 struct extent_buffer *buf, int record_parent);
2329 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root,
2331 u64 bytenr, u64 num_bytes, u64 parent,
2332 u64 root_objectid, u64 owner, u64 offset);
2333 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2334 struct btrfs_root *root,
2335 struct extent_io_tree *unpin);
2336 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2337 struct btrfs_root *root,
2338 u64 bytenr, u64 num_bytes, u64 parent,
2339 u64 root_objectid, u64 ref_generation,
2340 u64 owner_objectid);
2341 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2342 struct btrfs_root *root, u64 bytenr,
2343 u64 orig_parent, u64 parent,
2344 u64 root_objectid, u64 ref_generation,
2345 u64 owner_objectid);
2346 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2347 struct btrfs_root *root);
2348 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2349 int btrfs_read_block_groups(struct btrfs_root *root);
2350 struct btrfs_block_group_cache *
2351 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2352 u64 chunk_objectid, u64 chunk_offset, u64 size);
2353 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2354 struct btrfs_root *root, u64 bytes_used,
2355 u64 type, u64 chunk_objectid, u64 chunk_offset,
2357 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2358 struct btrfs_root *root);
2359 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2360 struct btrfs_root *root, u64 bytenr, u64 num,
2361 int alloc, int mark_free);
2362 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2363 struct btrfs_root *root, u64 objectid,
2364 struct btrfs_inode_item *inode,
2365 u64 file_pos, u64 disk_bytenr,
2367 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2368 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2369 void free_excluded_extents(struct btrfs_root *root,
2370 struct btrfs_block_group_cache *cache);
2371 int exclude_super_stripes(struct btrfs_root *root,
2372 struct btrfs_block_group_cache *cache);
2373 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2374 struct btrfs_fs_info *info, u64 start, u64 end);
2376 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2377 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2378 struct btrfs_path *path, int level, int slot);
2379 enum btrfs_tree_block_status
2380 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2381 struct extent_buffer *buf);
2382 enum btrfs_tree_block_status
2383 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2384 struct extent_buffer *buf);
2385 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2386 int level, int slot, u64 objectid);
2387 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2388 struct extent_buffer *parent, int slot);
2389 int btrfs_previous_item(struct btrfs_root *root,
2390 struct btrfs_path *path, u64 min_objectid,
2392 int btrfs_previous_extent_item(struct btrfs_root *root,
2393 struct btrfs_path *path, u64 min_objectid);
2394 int btrfs_next_extent_item(struct btrfs_root *root,
2395 struct btrfs_path *path, u64 max_objectid);
2396 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2397 struct btrfs_root *root, struct extent_buffer *buf,
2398 struct extent_buffer *parent, int parent_slot,
2399 struct extent_buffer **cow_ret);
2400 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2401 struct btrfs_root *root,
2402 struct extent_buffer *buf,
2403 struct extent_buffer *parent, int parent_slot,
2404 struct extent_buffer **cow_ret,
2405 u64 search_start, u64 empty_size);
2406 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2407 struct btrfs_root *root,
2408 struct extent_buffer *buf,
2409 struct extent_buffer **cow_ret, u64 new_root_objectid);
2410 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2411 *root, struct btrfs_path *path, u32 data_size);
2412 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 struct btrfs_path *path,
2415 u32 new_size, int from_end);
2416 int btrfs_split_item(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root,
2418 struct btrfs_path *path,
2419 struct btrfs_key *new_key,
2420 unsigned long split_offset);
2421 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2422 *root, struct btrfs_key *key, struct btrfs_path *p, int
2424 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2425 u64 iobjectid, u64 ioff, u8 key_type,
2426 struct btrfs_key *found_key);
2427 void btrfs_release_path(struct btrfs_path *p);
2428 void add_root_to_dirty_list(struct btrfs_root *root);
2429 struct btrfs_path *btrfs_alloc_path(void);
2430 void btrfs_free_path(struct btrfs_path *p);
2431 void btrfs_init_path(struct btrfs_path *p);
2432 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2433 struct btrfs_path *path, int slot, int nr);
2435 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2436 struct btrfs_root *root,
2437 struct btrfs_path *path)
2439 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2442 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2443 *root, struct btrfs_key *key, void *data, u32 data_size);
2444 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2445 struct btrfs_root *root,
2446 struct btrfs_path *path,
2447 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2449 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root,
2451 struct btrfs_path *path,
2452 struct btrfs_key *key,
2455 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2458 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2459 static inline int btrfs_next_item(struct btrfs_root *root,
2460 struct btrfs_path *p)
2463 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2464 return btrfs_next_leaf(root, p);
2468 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2469 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2470 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2471 struct btrfs_disk_key *key, int level);
2472 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2473 struct btrfs_key *new_key);
2474 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2475 struct btrfs_path *path,
2476 struct btrfs_key *new_key);
2479 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2480 struct btrfs_root *tree_root,
2481 u64 root_id, u8 type, u64 ref_id,
2482 u64 dirid, u64 sequence,
2483 const char *name, int name_len);
2484 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2485 *root, struct btrfs_key *key, struct btrfs_root_item
2487 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2488 *root, struct btrfs_key *key, struct btrfs_root_item
2490 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2491 btrfs_root_item *item, struct btrfs_key *key);
2493 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2494 *root, const char *name, int name_len, u64 dir,
2495 struct btrfs_key *location, u8 type, u64 index);
2496 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2497 struct btrfs_root *root,
2498 struct btrfs_path *path, u64 dir,
2499 const char *name, int name_len,
2501 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2502 struct btrfs_root *root,
2503 struct btrfs_path *path, u64 dir,
2504 const char *name, int name_len,
2505 u64 index, int mod);
2506 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2507 struct btrfs_root *root,
2508 struct btrfs_path *path,
2509 struct btrfs_dir_item *di);
2510 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2511 struct btrfs_root *root, const char *name,
2512 u16 name_len, const void *data, u16 data_len,
2515 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2516 struct btrfs_root *fs_root,
2517 u64 dirid, u64 *objectid);
2520 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2521 struct btrfs_root *root,
2522 const char *name, int name_len,
2523 u64 inode_objectid, u64 ref_objectid, u64 index);
2524 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2525 *root, u64 objectid, struct btrfs_inode_item
2527 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2528 *root, struct btrfs_path *path,
2529 struct btrfs_key *location, int mod);
2530 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2531 *trans, struct btrfs_path *path, struct btrfs_root *root,
2532 u64 ino, u64 parent_ino, u64 index, const char *name,
2533 int namelen, int ins_len);
2534 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root,
2536 const char *name, int name_len,
2537 u64 inode_objectid, u64 ref_objectid,
2539 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2540 struct btrfs_root *root,
2541 const char *name, int name_len,
2542 u64 inode_objectid, u64 ref_objectid, u64 index);
2543 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2544 struct btrfs_root *root, struct btrfs_path *path,
2545 const char *name, int namelen, u64 ino, u64 parent_ino,
2546 u64 index, int ins_len);
2547 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2548 struct btrfs_root *root, const char *name, int name_len,
2549 u64 ino, u64 parent_ino, u64 *index);
2552 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2553 struct btrfs_root *root, u64 bytenr, u64 len);
2554 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root,
2556 u64 objectid, u64 pos, u64 offset,
2559 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2560 struct btrfs_root *root, u64 objectid,
2561 u64 offset, char *buffer, size_t size);
2562 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2563 struct btrfs_root *root, u64 alloc_end,
2564 u64 bytenr, char *data, size_t len);
2565 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2566 struct btrfs_root *root, struct btrfs_path *path,
2570 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2571 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2574 static inline int is_fstree(u64 rootid)
2576 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2577 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2583 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2584 u64 dir, u64 index);
2585 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2587 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2588 u64 ino, u64 parent_ino, char *name, int namelen,
2589 u8 type, u64 *index, int add_backref);
2590 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2591 u64 ino, u64 parent_ino, u64 index, const char *name,
2592 int namelen, int add_orphan);
2593 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2594 struct btrfs_root *root, struct btrfs_path *path,
2596 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2597 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2600 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct btrfs_path *path,
2603 u64 ino, u64 offset, u64 len, int ins_len);
2604 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2605 struct btrfs_root *root,
2606 u64 ino, u64 offset, u64 len);