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.
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 0x4D5F53665248425F /* ascii _BHRfS_M, no null */
43 #define BTRFS_MAX_LEVEL 8
45 #define BTRFS_COMPAT_EXTENT_TREE_V0
47 /* holds pointers to all of the tree roots */
48 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
50 /* stores information about which extents are in use, and reference counts */
51 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
54 * chunk tree stores translations from logical -> physical block numbering
55 * the super block points to the chunk tree
57 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
60 * stores information about which areas of a given device are in use.
61 * one per device. The tree of tree roots points to the device tree
63 #define BTRFS_DEV_TREE_OBJECTID 4ULL
65 /* one per subvolume, storing files and directories */
66 #define BTRFS_FS_TREE_OBJECTID 5ULL
68 /* directory objectid inside the root tree */
69 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 /* holds checksums of all the data extents */
71 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
72 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
75 /* for storing balance parameters in the root tree */
76 #define BTRFS_BALANCE_OBJECTID -4ULL
78 /* oprhan objectid for tracking unlinked/truncated files */
79 #define BTRFS_ORPHAN_OBJECTID -5ULL
81 /* does write ahead logging to speed up fsyncs */
82 #define BTRFS_TREE_LOG_OBJECTID -6ULL
83 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
86 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
87 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
90 * extent checksums all have this objectid
91 * this allows them to share the logging tree
94 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
96 /* For storing free space cache */
97 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
100 * The inode number assigned to the special inode for sotring
103 #define BTRFS_FREE_INO_OBJECTID -12ULL
105 /* dummy objectid represents multiple objectids */
106 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
109 * All files have objectids in this range.
111 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
112 #define BTRFS_LAST_FREE_OBJECTID -256ULL
113 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
118 * the device items go into the chunk tree. The key is in the form
119 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
121 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
124 * the max metadata block size. This limit is somewhat artificial,
125 * but the memmove costs go through the roof for larger blocks.
127 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
130 * we can actually store much bigger names, but lets not confuse the rest
133 #define BTRFS_NAME_LEN 255
136 * Theoretical limit is larger, but we keep this down to a sane
137 * value. That should limit greatly the possibility of collisions on
140 #define BTRFS_LINK_MAX 65535U
142 /* 32 bytes in various csum fields */
143 #define BTRFS_CSUM_SIZE 32
146 #define BTRFS_CSUM_TYPE_CRC32 0
148 static int btrfs_csum_sizes[] = { 4, 0 };
150 /* four bytes for CRC32 */
151 #define BTRFS_CRC32_SIZE 4
152 #define BTRFS_EMPTY_DIR_SIZE 0
154 #define BTRFS_FT_UNKNOWN 0
155 #define BTRFS_FT_REG_FILE 1
156 #define BTRFS_FT_DIR 2
157 #define BTRFS_FT_CHRDEV 3
158 #define BTRFS_FT_BLKDEV 4
159 #define BTRFS_FT_FIFO 5
160 #define BTRFS_FT_SOCK 6
161 #define BTRFS_FT_SYMLINK 7
162 #define BTRFS_FT_XATTR 8
163 #define BTRFS_FT_MAX 9
165 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
168 * the key defines the order in the tree, and so it also defines (optimal)
169 * block layout. objectid corresonds to the inode number. The flags
170 * tells us things about the object, and is a kind of stream selector.
171 * so for a given inode, keys with flags of 1 might refer to the inode
172 * data, flags of 2 may point to file data in the btree and flags == 3
173 * may point to extents.
175 * offset is the starting byte offset for this key in the stream.
177 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
178 * in cpu native order. Otherwise they are identical and their sizes
179 * should be the same (ie both packed)
181 struct btrfs_disk_key {
185 } __attribute__ ((__packed__));
191 } __attribute__ ((__packed__));
193 struct btrfs_mapping_tree {
194 struct cache_tree cache_tree;
197 #define BTRFS_UUID_SIZE 16
198 struct btrfs_dev_item {
199 /* the internal btrfs device id */
202 /* size of the device */
208 /* optimal io alignment for this device */
211 /* optimal io width for this device */
214 /* minimal io size for this device */
217 /* type and info about this device */
220 /* expected generation for this device */
224 * starting byte of this partition on the device,
225 * to allowr for stripe alignment in the future
229 /* grouping information for allocation decisions */
232 /* seek speed 0-100 where 100 is fastest */
235 /* bandwidth 0-100 where 100 is fastest */
238 /* btrfs generated uuid for this device */
239 u8 uuid[BTRFS_UUID_SIZE];
241 /* uuid of FS who owns this device */
242 u8 fsid[BTRFS_UUID_SIZE];
243 } __attribute__ ((__packed__));
245 struct btrfs_stripe {
248 u8 dev_uuid[BTRFS_UUID_SIZE];
249 } __attribute__ ((__packed__));
252 /* size of this chunk in bytes */
255 /* objectid of the root referencing this chunk */
261 /* optimal io alignment for this chunk */
264 /* optimal io width for this chunk */
267 /* minimal io size for this chunk */
270 /* 2^16 stripes is quite a lot, a second limit is the size of a single
275 /* sub stripes only matter for raid10 */
277 struct btrfs_stripe stripe;
278 /* additional stripes go here */
279 } __attribute__ ((__packed__));
281 #define BTRFS_FREE_SPACE_EXTENT 1
282 #define BTRFS_FREE_SPACE_BITMAP 2
284 struct btrfs_free_space_entry {
288 } __attribute__ ((__packed__));
290 struct btrfs_free_space_header {
291 struct btrfs_disk_key location;
295 } __attribute__ ((__packed__));
297 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
299 BUG_ON(num_stripes == 0);
300 return sizeof(struct btrfs_chunk) +
301 sizeof(struct btrfs_stripe) * (num_stripes - 1);
304 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
305 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
306 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
307 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
309 #define BTRFS_BACKREF_REV_MAX 256
310 #define BTRFS_BACKREF_REV_SHIFT 56
311 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
312 BTRFS_BACKREF_REV_SHIFT)
314 #define BTRFS_OLD_BACKREF_REV 0
315 #define BTRFS_MIXED_BACKREF_REV 1
318 * every tree block (leaf or node) starts with this header.
320 struct btrfs_header {
321 /* these first four must match the super block */
322 u8 csum[BTRFS_CSUM_SIZE];
323 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
324 __le64 bytenr; /* which block this node is supposed to live in */
327 /* allowed to be different from the super from here on down */
328 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
333 } __attribute__ ((__packed__));
335 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
336 sizeof(struct btrfs_header)) / \
337 sizeof(struct btrfs_key_ptr))
338 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
339 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
340 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
341 sizeof(struct btrfs_item) - \
342 sizeof(struct btrfs_file_extent_item))
343 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
344 sizeof(struct btrfs_item) -\
345 sizeof(struct btrfs_dir_item))
349 * this is a very generous portion of the super block, giving us
350 * room to translate 14 chunks with 3 stripes each.
352 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
353 #define BTRFS_LABEL_SIZE 256
356 * just in case we somehow lose the roots and are not able to mount,
357 * we store an array of the roots from previous transactions
360 #define BTRFS_NUM_BACKUP_ROOTS 4
361 struct btrfs_root_backup {
363 __le64 tree_root_gen;
366 __le64 chunk_root_gen;
369 __le64 extent_root_gen;
378 __le64 csum_root_gen;
388 u8 extent_root_level;
392 /* future and to align */
394 } __attribute__ ((__packed__));
397 * the super block basically lists the main trees of the FS
398 * it currently lacks any block count etc etc
400 struct btrfs_super_block {
401 u8 csum[BTRFS_CSUM_SIZE];
402 /* the first 3 fields must match struct btrfs_header */
403 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
404 __le64 bytenr; /* this block number */
407 /* allowed to be different from the btrfs_header from here own down */
414 /* this will help find the new super based on the log root */
415 __le64 log_root_transid;
418 __le64 root_dir_objectid;
424 __le32 sys_chunk_array_size;
425 __le64 chunk_root_generation;
427 __le64 compat_ro_flags;
428 __le64 incompat_flags;
433 struct btrfs_dev_item dev_item;
435 char label[BTRFS_LABEL_SIZE];
437 __le64 cache_generation;
439 /* future expansion */
441 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
442 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
443 } __attribute__ ((__packed__));
446 * Compat flags that we support. If any incompat flags are set other than the
447 * ones specified below then we will fail to mount
449 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
450 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
451 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
452 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
455 * some patches floated around with a second compression method
456 * lets save that incompat here for when they do get in
457 * Note we don't actually support it, we're just reserving the
460 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
463 * older kernels tried to do bigger metadata blocks, but the
464 * code was pretty buggy. Lets not let them try anymore.
466 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
467 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
468 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
469 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
472 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
473 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
474 #define BTRFS_FEATURE_INCOMPAT_SUPP \
475 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
476 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
477 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
478 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
479 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
480 BTRFS_FEATURE_INCOMPAT_RAID56 | \
481 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
482 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA)
485 * A leaf is full of items. offset and size tell us where to find
486 * the item in the leaf (relative to the start of the data area)
489 struct btrfs_disk_key key;
492 } __attribute__ ((__packed__));
495 * leaves have an item area and a data area:
496 * [item0, item1....itemN] [free space] [dataN...data1, data0]
498 * The data is separate from the items to get the keys closer together
502 struct btrfs_header header;
503 struct btrfs_item items[];
504 } __attribute__ ((__packed__));
507 * all non-leaf blocks are nodes, they hold only keys and pointers to
510 struct btrfs_key_ptr {
511 struct btrfs_disk_key key;
514 } __attribute__ ((__packed__));
517 struct btrfs_header header;
518 struct btrfs_key_ptr ptrs[];
519 } __attribute__ ((__packed__));
522 * btrfs_paths remember the path taken from the root down to the leaf.
523 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
524 * to any other levels that are present.
526 * The slots array records the index of the item or block pointer
527 * used while walking the tree.
531 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
532 int slots[BTRFS_MAX_LEVEL];
533 /* if there is real range locking, this locks field will change */
534 int locks[BTRFS_MAX_LEVEL];
536 /* keep some upper locks as we walk down */
540 * set by btrfs_split_item, tells search_slot to keep all locks
541 * and to force calls to keep space in the nodes
543 unsigned int search_for_split:1;
544 unsigned int keep_locks:1;
545 unsigned int skip_locking:1;
546 unsigned int leave_spinning:1;
550 * items in the extent btree are used to record the objectid of the
551 * owner of the block and the number of references
554 struct btrfs_extent_item {
558 } __attribute__ ((__packed__));
560 struct btrfs_extent_item_v0 {
562 } __attribute__ ((__packed__));
564 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
565 sizeof(struct btrfs_item))
567 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
568 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
570 /* following flags only apply to tree blocks */
572 /* use full backrefs for extent pointers in the block*/
573 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
575 struct btrfs_tree_block_info {
576 struct btrfs_disk_key key;
578 } __attribute__ ((__packed__));
580 struct btrfs_extent_data_ref {
585 } __attribute__ ((__packed__));
587 struct btrfs_shared_data_ref {
589 } __attribute__ ((__packed__));
591 struct btrfs_extent_inline_ref {
594 } __attribute__ ((__packed__));
596 struct btrfs_extent_ref_v0 {
601 } __attribute__ ((__packed__));
603 /* dev extents record free space on individual devices. The owner
604 * field points back to the chunk allocation mapping tree that allocated
605 * the extent. The chunk tree uuid field is a way to double check the owner
607 struct btrfs_dev_extent {
609 __le64 chunk_objectid;
612 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
613 } __attribute__ ((__packed__));
615 struct btrfs_inode_ref {
619 } __attribute__ ((__packed__));
621 struct btrfs_inode_extref {
622 __le64 parent_objectid;
625 __u8 name[0]; /* name goes here */
626 } __attribute__ ((__packed__));
628 struct btrfs_timespec {
631 } __attribute__ ((__packed__));
634 BTRFS_COMPRESS_NONE = 0,
635 BTRFS_COMPRESS_ZLIB = 1,
636 BTRFS_COMPRESS_LZO = 2,
637 BTRFS_COMPRESS_TYPES = 2,
638 BTRFS_COMPRESS_LAST = 3,
639 } btrfs_compression_type;
641 /* we don't understand any encryption methods right now */
643 BTRFS_ENCRYPTION_NONE = 0,
644 BTRFS_ENCRYPTION_LAST = 1,
645 } btrfs_encryption_type;
647 struct btrfs_inode_item {
648 /* nfs style generation number */
650 /* transid that last touched this inode */
662 /* modification sequence number for NFS */
666 * a little future expansion, for more than this we can
667 * just grow the inode item and version it
670 struct btrfs_timespec atime;
671 struct btrfs_timespec ctime;
672 struct btrfs_timespec mtime;
673 struct btrfs_timespec otime;
674 } __attribute__ ((__packed__));
676 struct btrfs_dir_log_item {
678 } __attribute__ ((__packed__));
680 struct btrfs_dir_item {
681 struct btrfs_disk_key location;
686 } __attribute__ ((__packed__));
688 struct btrfs_root_item_v0 {
689 struct btrfs_inode_item inode;
695 __le64 last_snapshot;
698 struct btrfs_disk_key drop_progress;
701 } __attribute__ ((__packed__));
703 struct btrfs_root_item {
704 struct btrfs_inode_item inode;
710 __le64 last_snapshot;
713 struct btrfs_disk_key drop_progress;
718 * The following fields appear after subvol_uuids+subvol_times
723 * This generation number is used to test if the new fields are valid
724 * and up to date while reading the root item. Everytime the root item
725 * is written out, the "generation" field is copied into this field. If
726 * anyone ever mounted the fs with an older kernel, we will have
727 * mismatching generation values here and thus must invalidate the
728 * new fields. See btrfs_update_root and btrfs_find_last_root for
730 * the offset of generation_v2 is also used as the start for the memset
731 * when invalidating the fields.
733 __le64 generation_v2;
734 u8 uuid[BTRFS_UUID_SIZE];
735 u8 parent_uuid[BTRFS_UUID_SIZE];
736 u8 received_uuid[BTRFS_UUID_SIZE];
737 __le64 ctransid; /* updated when an inode changes */
738 __le64 otransid; /* trans when created */
739 __le64 stransid; /* trans when sent. non-zero for received subvol */
740 __le64 rtransid; /* trans when received. non-zero for received subvol */
741 struct btrfs_timespec ctime;
742 struct btrfs_timespec otime;
743 struct btrfs_timespec stime;
744 struct btrfs_timespec rtime;
745 __le64 reserved[8]; /* for future */
746 } __attribute__ ((__packed__));
749 * this is used for both forward and backward root refs
751 struct btrfs_root_ref {
755 } __attribute__ ((__packed__));
757 #define BTRFS_FILE_EXTENT_INLINE 0
758 #define BTRFS_FILE_EXTENT_REG 1
759 #define BTRFS_FILE_EXTENT_PREALLOC 2
761 struct btrfs_file_extent_item {
763 * transaction id that created this extent
767 * max number of bytes to hold this extent in ram
768 * when we split a compressed extent we can't know how big
769 * each of the resulting pieces will be. So, this is
770 * an upper limit on the size of the extent in ram instead of
776 * 32 bits for the various ways we might encode the data,
777 * including compression and encryption. If any of these
778 * are set to something a given disk format doesn't understand
779 * it is treated like an incompat flag for reading and writing,
784 __le16 other_encoding; /* spare for later use */
786 /* are we inline data or a real extent? */
790 * disk space consumed by the extent, checksum blocks are included
794 __le64 disk_num_bytes;
796 * the logical offset in file blocks (no csums)
797 * this extent record is for. This allows a file extent to point
798 * into the middle of an existing extent on disk, sharing it
799 * between two snapshots (useful if some bytes in the middle of the
800 * extent have changed
804 * the logical number of file blocks (no csums included)
808 } __attribute__ ((__packed__));
810 struct btrfs_csum_item {
812 } __attribute__ ((__packed__));
814 /* tag for the radix tree of block groups in ram */
815 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
816 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
817 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
818 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
819 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
820 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
821 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
822 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
823 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
824 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
826 /* used in struct btrfs_balance_args fields */
827 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
829 #define BTRFS_QGROUP_STATUS_OFF 0
830 #define BTRFS_QGROUP_STATUS_ON 1
831 #define BTRFS_QGROUP_STATUS_SCANNING 2
833 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
835 struct btrfs_qgroup_status_item {
839 __le64 scan; /* progress during scanning */
840 } __attribute__ ((__packed__));
842 struct btrfs_block_group_item {
844 __le64 chunk_objectid;
846 } __attribute__ ((__packed__));
848 struct btrfs_qgroup_info_item {
851 __le64 referenced_compressed;
853 __le64 exclusive_compressed;
854 } __attribute__ ((__packed__));
856 /* flags definition for qgroup limits */
857 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
858 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
859 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
860 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
861 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
862 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
864 struct btrfs_qgroup_limit_item {
866 __le64 max_referenced;
867 __le64 max_exclusive;
868 __le64 rsv_referenced;
869 __le64 rsv_exclusive;
870 } __attribute__ ((__packed__));
872 struct btrfs_space_info {
878 struct list_head list;
881 struct btrfs_block_group_cache {
882 struct cache_extent cache;
883 struct btrfs_key key;
884 struct btrfs_block_group_item item;
885 struct btrfs_space_info *space_info;
886 struct btrfs_free_space_ctl *free_space_ctl;
893 struct btrfs_extent_ops {
894 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
895 u64 hint_byte, struct btrfs_key *ins);
896 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
901 struct btrfs_fs_devices;
902 struct btrfs_fs_info {
903 u8 fsid[BTRFS_FSID_SIZE];
904 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
905 struct btrfs_root *fs_root;
906 struct btrfs_root *extent_root;
907 struct btrfs_root *tree_root;
908 struct btrfs_root *chunk_root;
909 struct btrfs_root *dev_root;
910 struct btrfs_root *csum_root;
912 struct rb_root fs_root_tree;
914 /* the log root tree is a directory of all the other log roots */
915 struct btrfs_root *log_root_tree;
917 struct extent_io_tree extent_cache;
918 struct extent_io_tree free_space_cache;
919 struct extent_io_tree block_group_cache;
920 struct extent_io_tree pinned_extents;
921 struct extent_io_tree pending_del;
922 struct extent_io_tree extent_ins;
924 /* logical->physical extent mapping */
925 struct btrfs_mapping_tree mapping_tree;
928 u64 last_trans_committed;
930 u64 avail_data_alloc_bits;
931 u64 avail_metadata_alloc_bits;
932 u64 avail_system_alloc_bits;
933 u64 data_alloc_profile;
934 u64 metadata_alloc_profile;
935 u64 system_alloc_profile;
938 struct btrfs_trans_handle *running_transaction;
939 struct btrfs_super_block *super_copy;
940 struct mutex fs_mutex;
945 struct btrfs_extent_ops *extent_ops;
946 struct list_head dirty_cowonly_roots;
948 struct btrfs_fs_devices *fs_devices;
949 struct list_head space_info;
953 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
954 struct btrfs_root *root,
955 u64 bytenr, u64 num_bytes, u64 parent,
956 u64 root_objectid, u64 owner, u64 offset,
958 struct cache_tree *fsck_extent_cache;
959 struct cache_tree *corrupt_blocks;
963 * in ram representation of the tree. extent_root is used for all allocations
964 * and for the extent tree extent_root root.
967 struct extent_buffer *node;
968 struct extent_buffer *commit_root;
969 struct btrfs_root_item root_item;
970 struct btrfs_key root_key;
971 struct btrfs_fs_info *fs_info;
975 /* data allocations are done in sectorsize units */
978 /* node allocations are done in nodesize units */
981 /* leaf allocations are done in leafsize units */
984 /* leaf allocations are done in leafsize units */
993 u64 last_inode_alloc;
995 /* the dirty list is only used by non-reference counted roots */
996 struct list_head dirty_list;
997 struct rb_node rb_node;
1001 * inode items have the data typically returned from stat and store other
1002 * info about object characteristics. There is one for every file and dir in
1005 #define BTRFS_INODE_ITEM_KEY 1
1006 #define BTRFS_INODE_REF_KEY 12
1007 #define BTRFS_INODE_EXTREF_KEY 13
1008 #define BTRFS_XATTR_ITEM_KEY 24
1009 #define BTRFS_ORPHAN_ITEM_KEY 48
1011 #define BTRFS_DIR_LOG_ITEM_KEY 60
1012 #define BTRFS_DIR_LOG_INDEX_KEY 72
1014 * dir items are the name -> inode pointers in a directory. There is one
1015 * for every name in a directory.
1017 #define BTRFS_DIR_ITEM_KEY 84
1018 #define BTRFS_DIR_INDEX_KEY 96
1021 * extent data is for file data
1023 #define BTRFS_EXTENT_DATA_KEY 108
1026 * csum items have the checksums for data in the extents
1028 #define BTRFS_CSUM_ITEM_KEY 120
1030 * extent csums are stored in a separate tree and hold csums for
1031 * an entire extent on disk.
1033 #define BTRFS_EXTENT_CSUM_KEY 128
1036 * root items point to tree roots. There are typically in the root
1037 * tree used by the super block to find all the other trees
1039 #define BTRFS_ROOT_ITEM_KEY 132
1042 * root backrefs tie subvols and snapshots to the directory entries that
1045 #define BTRFS_ROOT_BACKREF_KEY 144
1048 * root refs make a fast index for listing all of the snapshots and
1049 * subvolumes referenced by a given root. They point directly to the
1050 * directory item in the root that references the subvol
1052 #define BTRFS_ROOT_REF_KEY 156
1055 * extent items are in the extent map tree. These record which blocks
1056 * are used, and how many references there are to each block
1058 #define BTRFS_EXTENT_ITEM_KEY 168
1061 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1062 * the length, so we save the level in key->offset instead of the length.
1064 #define BTRFS_METADATA_ITEM_KEY 169
1066 #define BTRFS_TREE_BLOCK_REF_KEY 176
1068 #define BTRFS_EXTENT_DATA_REF_KEY 178
1070 /* old style extent backrefs */
1071 #define BTRFS_EXTENT_REF_V0_KEY 180
1073 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1075 #define BTRFS_SHARED_DATA_REF_KEY 184
1079 * block groups give us hints into the extent allocation trees. Which
1080 * blocks are free etc etc
1082 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1084 #define BTRFS_DEV_EXTENT_KEY 204
1085 #define BTRFS_DEV_ITEM_KEY 216
1086 #define BTRFS_CHUNK_ITEM_KEY 228
1088 #define BTRFS_BALANCE_ITEM_KEY 248
1093 #define BTRFS_QGROUP_STATUS_KEY 240
1094 #define BTRFS_QGROUP_INFO_KEY 242
1095 #define BTRFS_QGROUP_LIMIT_KEY 244
1096 #define BTRFS_QGROUP_RELATION_KEY 246
1099 * Persistently stores the io stats in the device tree.
1100 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1102 #define BTRFS_DEV_STATS_KEY 249
1105 * Persistently stores the device replace state in the device tree.
1106 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1108 #define BTRFS_DEV_REPLACE_KEY 250
1111 * string items are for debugging. They just store a short string of
1114 #define BTRFS_STRING_ITEM_KEY 253
1118 #define BTRFS_INODE_NODATASUM (1 << 0)
1119 #define BTRFS_INODE_NODATACOW (1 << 1)
1120 #define BTRFS_INODE_READONLY (1 << 2)
1122 #define read_eb_member(eb, ptr, type, member, result) ( \
1123 read_extent_buffer(eb, (char *)(result), \
1124 ((unsigned long)(ptr)) + \
1125 offsetof(type, member), \
1126 sizeof(((type *)0)->member)))
1128 #define write_eb_member(eb, ptr, type, member, result) ( \
1129 write_extent_buffer(eb, (char *)(result), \
1130 ((unsigned long)(ptr)) + \
1131 offsetof(type, member), \
1132 sizeof(((type *)0)->member)))
1134 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1135 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1137 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1138 return le##bits##_to_cpu(h->member); \
1140 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1143 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1144 h->member = cpu_to_le##bits(val); \
1147 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1148 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1151 unsigned long offset = (unsigned long)s; \
1152 type *p = (type *) (eb->data + offset); \
1153 return get_unaligned_le##bits(&p->member); \
1155 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1156 type *s, u##bits val) \
1158 unsigned long offset = (unsigned long)s; \
1159 type *p = (type *) (eb->data + offset); \
1160 put_unaligned_le##bits(val, &p->member); \
1163 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1164 static inline u##bits btrfs_##name(type *s) \
1166 return le##bits##_to_cpu(s->member); \
1168 static inline void btrfs_set_##name(type *s, u##bits val) \
1170 s->member = cpu_to_le##bits(val); \
1173 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1174 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1175 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1176 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1177 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1178 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1180 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1181 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1182 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1183 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1184 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1185 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1187 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1188 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1190 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1192 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1194 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1196 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1198 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1199 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1201 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1203 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1205 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1208 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1210 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1213 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1215 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1218 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1219 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1220 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1221 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1222 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1223 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1224 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1225 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1226 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1227 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1228 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1230 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1232 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1235 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1236 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1237 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1239 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1241 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1243 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1245 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1246 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1248 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1250 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1251 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1253 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1256 unsigned long offset = (unsigned long)c;
1257 offset += offsetof(struct btrfs_chunk, stripe);
1258 offset += nr * sizeof(struct btrfs_stripe);
1259 return (struct btrfs_stripe *)offset;
1262 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1264 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1267 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1268 struct btrfs_chunk *c, int nr)
1270 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1273 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1274 struct btrfs_chunk *c, int nr,
1277 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1280 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1281 struct btrfs_chunk *c, int nr)
1283 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1286 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1287 struct btrfs_chunk *c, int nr,
1290 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1293 /* struct btrfs_block_group_item */
1294 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1296 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1298 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1299 struct btrfs_block_group_item, chunk_objectid, 64);
1301 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1302 struct btrfs_block_group_item, chunk_objectid, 64);
1303 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1304 struct btrfs_block_group_item, flags, 64);
1305 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1306 struct btrfs_block_group_item, flags, 64);
1308 /* struct btrfs_inode_ref */
1309 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1310 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1311 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1313 /* struct btrfs_inode_extref */
1314 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1315 parent_objectid, 64);
1316 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1318 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1320 /* struct btrfs_inode_item */
1321 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1322 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1323 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1324 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1325 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1326 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1327 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1328 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1329 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1330 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1331 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1332 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1334 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1335 struct btrfs_inode_item, generation, 64);
1336 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1337 struct btrfs_inode_item, generation, 64);
1338 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1339 struct btrfs_inode_item, size, 64);
1340 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1341 struct btrfs_inode_item, nbytes, 64);
1342 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1343 struct btrfs_inode_item, block_group, 64);
1344 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1345 struct btrfs_inode_item, nlink, 32);
1346 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1347 struct btrfs_inode_item, uid, 32);
1348 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1349 struct btrfs_inode_item, gid, 32);
1350 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1351 struct btrfs_inode_item, mode, 32);
1352 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1353 struct btrfs_inode_item, rdev, 64);
1354 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1355 struct btrfs_inode_item, flags, 64);
1357 static inline struct btrfs_timespec *
1358 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1360 unsigned long ptr = (unsigned long)inode_item;
1361 ptr += offsetof(struct btrfs_inode_item, atime);
1362 return (struct btrfs_timespec *)ptr;
1365 static inline struct btrfs_timespec *
1366 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1368 unsigned long ptr = (unsigned long)inode_item;
1369 ptr += offsetof(struct btrfs_inode_item, mtime);
1370 return (struct btrfs_timespec *)ptr;
1373 static inline struct btrfs_timespec *
1374 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1376 unsigned long ptr = (unsigned long)inode_item;
1377 ptr += offsetof(struct btrfs_inode_item, ctime);
1378 return (struct btrfs_timespec *)ptr;
1381 static inline struct btrfs_timespec *
1382 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1384 unsigned long ptr = (unsigned long)inode_item;
1385 ptr += offsetof(struct btrfs_inode_item, otime);
1386 return (struct btrfs_timespec *)ptr;
1389 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1390 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1391 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1393 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1396 /* struct btrfs_dev_extent */
1397 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1399 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1400 chunk_objectid, 64);
1401 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1403 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1405 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1407 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1408 return (u8 *)((unsigned long)dev + ptr);
1412 /* struct btrfs_extent_item */
1413 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1414 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1415 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1417 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1418 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1420 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1422 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1424 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1425 struct btrfs_tree_block_info *item,
1426 struct btrfs_disk_key *key)
1428 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1431 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1432 struct btrfs_tree_block_info *item,
1433 struct btrfs_disk_key *key)
1435 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1438 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1440 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1442 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1444 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1447 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1450 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1452 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1454 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1455 struct btrfs_extent_inline_ref, type, 8);
1456 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1457 struct btrfs_extent_inline_ref, offset, 64);
1459 static inline u32 btrfs_extent_inline_ref_size(int type)
1461 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1462 type == BTRFS_SHARED_BLOCK_REF_KEY)
1463 return sizeof(struct btrfs_extent_inline_ref);
1464 if (type == BTRFS_SHARED_DATA_REF_KEY)
1465 return sizeof(struct btrfs_shared_data_ref) +
1466 sizeof(struct btrfs_extent_inline_ref);
1467 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1468 return sizeof(struct btrfs_extent_data_ref) +
1469 offsetof(struct btrfs_extent_inline_ref, offset);
1474 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1475 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1477 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1478 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1480 /* struct btrfs_node */
1481 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1482 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1484 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1487 ptr = offsetof(struct btrfs_node, ptrs) +
1488 sizeof(struct btrfs_key_ptr) * nr;
1489 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1492 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1496 ptr = offsetof(struct btrfs_node, ptrs) +
1497 sizeof(struct btrfs_key_ptr) * nr;
1498 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1501 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1504 ptr = offsetof(struct btrfs_node, ptrs) +
1505 sizeof(struct btrfs_key_ptr) * nr;
1506 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1509 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1513 ptr = offsetof(struct btrfs_node, ptrs) +
1514 sizeof(struct btrfs_key_ptr) * nr;
1515 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1518 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1520 return offsetof(struct btrfs_node, ptrs) +
1521 sizeof(struct btrfs_key_ptr) * nr;
1524 static inline void btrfs_node_key(struct extent_buffer *eb,
1525 struct btrfs_disk_key *disk_key, int nr)
1528 ptr = btrfs_node_key_ptr_offset(nr);
1529 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1530 struct btrfs_key_ptr, key, disk_key);
1533 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1534 struct btrfs_disk_key *disk_key, int nr)
1537 ptr = btrfs_node_key_ptr_offset(nr);
1538 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1539 struct btrfs_key_ptr, key, disk_key);
1542 /* struct btrfs_item */
1543 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1544 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1546 static inline unsigned long btrfs_item_nr_offset(int nr)
1548 return offsetof(struct btrfs_leaf, items) +
1549 sizeof(struct btrfs_item) * nr;
1552 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1555 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1558 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1559 struct btrfs_item *item)
1561 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1564 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1566 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1569 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1571 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1574 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1576 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1579 static inline void btrfs_item_key(struct extent_buffer *eb,
1580 struct btrfs_disk_key *disk_key, int nr)
1582 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1583 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1586 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1587 struct btrfs_disk_key *disk_key, int nr)
1589 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1590 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1593 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1596 * struct btrfs_root_ref
1598 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1599 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1600 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1602 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1603 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1604 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1606 /* struct btrfs_dir_item */
1607 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1608 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1609 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1610 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1614 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1615 struct btrfs_dir_item *item,
1616 struct btrfs_disk_key *key)
1618 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1621 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1622 struct btrfs_dir_item *item,
1623 struct btrfs_disk_key *key)
1625 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1628 /* struct btrfs_free_space_header */
1629 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1631 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1633 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1636 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1637 struct btrfs_free_space_header *h,
1638 struct btrfs_disk_key *key)
1640 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1643 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1644 struct btrfs_free_space_header *h,
1645 struct btrfs_disk_key *key)
1647 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1650 /* struct btrfs_disk_key */
1651 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1653 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1654 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1656 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1657 struct btrfs_disk_key *disk)
1659 cpu->offset = le64_to_cpu(disk->offset);
1660 cpu->type = disk->type;
1661 cpu->objectid = le64_to_cpu(disk->objectid);
1664 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1665 struct btrfs_key *cpu)
1667 disk->offset = cpu_to_le64(cpu->offset);
1668 disk->type = cpu->type;
1669 disk->objectid = cpu_to_le64(cpu->objectid);
1672 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1673 struct btrfs_key *key, int nr)
1675 struct btrfs_disk_key disk_key;
1676 btrfs_node_key(eb, &disk_key, nr);
1677 btrfs_disk_key_to_cpu(key, &disk_key);
1680 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1681 struct btrfs_key *key, int nr)
1683 struct btrfs_disk_key disk_key;
1684 btrfs_item_key(eb, &disk_key, nr);
1685 btrfs_disk_key_to_cpu(key, &disk_key);
1688 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1689 struct btrfs_dir_item *item,
1690 struct btrfs_key *key)
1692 struct btrfs_disk_key disk_key;
1693 btrfs_dir_item_key(eb, item, &disk_key);
1694 btrfs_disk_key_to_cpu(key, &disk_key);
1698 static inline u8 btrfs_key_type(struct btrfs_key *key)
1703 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1708 /* struct btrfs_header */
1709 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1710 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1712 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1713 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1714 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1715 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1717 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1719 return (btrfs_header_flags(eb) & flag) == flag;
1722 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1724 u64 flags = btrfs_header_flags(eb);
1725 btrfs_set_header_flags(eb, flags | flag);
1726 return (flags & flag) == flag;
1729 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1731 u64 flags = btrfs_header_flags(eb);
1732 btrfs_set_header_flags(eb, flags & ~flag);
1733 return (flags & flag) == flag;
1736 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1738 u64 flags = btrfs_header_flags(eb);
1739 return flags >> BTRFS_BACKREF_REV_SHIFT;
1742 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1745 u64 flags = btrfs_header_flags(eb);
1746 flags &= ~BTRFS_BACKREF_REV_MASK;
1747 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1748 btrfs_set_header_flags(eb, flags);
1751 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1753 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1757 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1759 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1763 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1765 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1769 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1771 unsigned long ptr = offsetof(struct btrfs_header, csum);
1775 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1780 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1785 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1790 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1792 return (btrfs_header_level(eb) == 0);
1795 /* struct btrfs_root_item */
1796 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1798 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1799 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1800 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1802 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1804 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1805 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1806 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1807 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1808 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1809 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1810 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1811 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1813 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1815 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1817 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1819 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1821 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1824 /* struct btrfs_root_backup */
1825 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1827 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1829 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1830 tree_root_level, 8);
1832 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1834 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1835 chunk_root_gen, 64);
1836 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1837 chunk_root_level, 8);
1839 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1841 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1842 extent_root_gen, 64);
1843 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1844 extent_root_level, 8);
1846 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1848 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1850 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1853 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1855 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1857 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1860 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1862 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1864 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1865 csum_root_level, 8);
1866 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1868 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1870 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1873 /* struct btrfs_super_block */
1875 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1876 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1877 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1879 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1880 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1881 struct btrfs_super_block, sys_chunk_array_size, 32);
1882 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1883 struct btrfs_super_block, chunk_root_generation, 64);
1884 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1886 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1888 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1889 chunk_root_level, 8);
1890 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1892 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1893 log_root_transid, 64);
1894 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1896 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1898 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1900 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1902 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1904 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1906 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1908 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1909 root_dir_objectid, 64);
1910 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1912 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1914 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1916 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1917 incompat_flags, 64);
1918 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1920 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1921 cache_generation, 64);
1923 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1925 int t = btrfs_super_csum_type(s);
1926 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1927 return btrfs_csum_sizes[t];
1930 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1932 return offsetof(struct btrfs_leaf, items);
1935 /* struct btrfs_file_extent_item */
1936 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1937 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1939 static inline unsigned long btrfs_file_extent_inline_start(struct
1940 btrfs_file_extent_item *e)
1942 unsigned long offset = (unsigned long)e;
1943 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1947 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1949 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1952 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1954 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1956 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1958 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1960 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1961 disk_num_bytes, 64);
1962 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1964 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1966 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1968 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1970 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1972 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1974 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1976 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1978 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1980 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1981 other_encoding, 16);
1983 /* btrfs_qgroup_status_item */
1984 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
1986 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
1988 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
1990 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
1993 /* btrfs_qgroup_info_item */
1994 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
1996 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
1998 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
1999 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2000 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2002 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2003 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2005 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2006 struct btrfs_qgroup_info_item, generation, 64);
2007 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2008 struct btrfs_qgroup_info_item, referenced, 64);
2009 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2010 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2011 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2012 struct btrfs_qgroup_info_item, exclusive, 64);
2013 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2014 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2016 /* btrfs_qgroup_limit_item */
2017 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2019 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2020 max_referenced, 64);
2021 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2023 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2024 rsv_referenced, 64);
2025 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2028 /* this returns the number of file bytes represented by the inline item.
2029 * If an item is compressed, this is the uncompressed size
2031 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2032 struct btrfs_file_extent_item *e)
2034 return btrfs_file_extent_ram_bytes(eb, e);
2038 * this returns the number of bytes used by the item on disk, minus the
2039 * size of any extent headers. If a file is compressed on disk, this is
2040 * the compressed size
2042 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2043 struct btrfs_item *e)
2045 unsigned long offset;
2046 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2047 return btrfs_item_size(eb, e) - offset;
2050 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2052 return root->leafsize;
2053 return root->nodesize;
2056 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2058 struct btrfs_super_block *disk_super;
2059 disk_super = fs_info->super_copy;
2060 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2063 /* helper function to cast into the data area of the leaf. */
2064 #define btrfs_item_ptr(leaf, slot, type) \
2065 ((type *)(btrfs_leaf_data(leaf) + \
2066 btrfs_item_offset_nr(leaf, slot)))
2068 #define btrfs_item_ptr_offset(leaf, slot) \
2069 ((unsigned long)(btrfs_leaf_data(leaf) + \
2070 btrfs_item_offset_nr(leaf, slot)))
2073 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2074 struct btrfs_root *root);
2075 int btrfs_check_block_accounting(struct btrfs_root *root);
2076 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2077 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2078 u64 bytenr, u64 num_bytes);
2079 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2080 struct btrfs_root *root);
2081 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2082 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2083 btrfs_fs_info *info,
2085 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2086 btrfs_fs_info *info,
2088 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
2089 struct btrfs_block_group_cache
2090 *hint, u64 search_start,
2091 int data, int owner);
2092 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root,
2094 u32 blocksize, u64 root_objectid,
2095 struct btrfs_disk_key *key, int level,
2096 u64 hint, u64 empty_size);
2097 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2098 struct btrfs_root *root,
2099 u64 num_bytes, u64 parent,
2100 u64 root_objectid, u64 ref_generation,
2101 u64 owner, u64 empty_size, u64 hint_byte,
2102 u64 search_end, struct btrfs_key *ins, int data);
2103 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2104 struct btrfs_root *root, u64 bytenr,
2105 u64 offset, int metadata, u64 *refs, u64 *flags);
2106 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2107 struct btrfs_root *root,
2108 u64 bytenr, int level, u64 flags);
2109 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2110 struct extent_buffer *buf, int record_parent);
2111 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2112 struct extent_buffer *buf, int record_parent);
2113 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2114 struct btrfs_root *root,
2115 u64 bytenr, u64 num_bytes, u64 parent,
2116 u64 root_objectid, u64 owner, u64 offset);
2117 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2118 struct btrfs_root *root,
2119 struct extent_io_tree *unpin);
2120 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2121 struct btrfs_root *root,
2122 u64 bytenr, u64 num_bytes, u64 parent,
2123 u64 root_objectid, u64 ref_generation,
2124 u64 owner_objectid);
2125 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2126 struct btrfs_root *root, u64 bytenr,
2127 u64 orig_parent, u64 parent,
2128 u64 root_objectid, u64 ref_generation,
2129 u64 owner_objectid);
2130 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2131 struct btrfs_root *root);
2132 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2133 int btrfs_read_block_groups(struct btrfs_root *root);
2134 struct btrfs_block_group_cache *
2135 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2136 u64 chunk_objectid, u64 chunk_offset, u64 size);
2137 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2138 struct btrfs_root *root, u64 bytes_used,
2139 u64 type, u64 chunk_objectid, u64 chunk_offset,
2141 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2142 struct btrfs_root *root);
2143 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2144 struct btrfs_root *root, u64 bytenr, u64 num,
2145 int alloc, int mark_free);
2147 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2148 struct btrfs_path *path, int level, int slot);
2149 int btrfs_check_node(struct btrfs_root *root,
2150 struct btrfs_disk_key *parent_key,
2151 struct extent_buffer *buf);
2152 int btrfs_check_leaf(struct btrfs_root *root,
2153 struct btrfs_disk_key *parent_key,
2154 struct extent_buffer *buf);
2155 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2156 int level, int slot, u64 objectid);
2157 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2158 struct extent_buffer *parent, int slot);
2159 int btrfs_previous_item(struct btrfs_root *root,
2160 struct btrfs_path *path, u64 min_objectid,
2162 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
2163 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2164 struct btrfs_root *root, struct extent_buffer *buf,
2165 struct extent_buffer *parent, int parent_slot,
2166 struct extent_buffer **cow_ret);
2167 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2168 struct btrfs_root *root,
2169 struct extent_buffer *buf,
2170 struct extent_buffer *parent, int parent_slot,
2171 struct extent_buffer **cow_ret,
2172 u64 search_start, u64 empty_size);
2173 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2174 struct btrfs_root *root,
2175 struct extent_buffer *buf,
2176 struct extent_buffer **cow_ret, u64 new_root_objectid);
2177 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2178 *root, struct btrfs_path *path, u32 data_size);
2179 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2180 struct btrfs_root *root,
2181 struct btrfs_path *path,
2182 u32 new_size, int from_end);
2183 int btrfs_split_item(struct btrfs_trans_handle *trans,
2184 struct btrfs_root *root,
2185 struct btrfs_path *path,
2186 struct btrfs_key *new_key,
2187 unsigned long split_offset);
2188 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2189 *root, struct btrfs_key *key, struct btrfs_path *p, int
2191 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2192 void add_root_to_dirty_list(struct btrfs_root *root);
2193 struct btrfs_path *btrfs_alloc_path(void);
2194 void btrfs_free_path(struct btrfs_path *p);
2195 void btrfs_init_path(struct btrfs_path *p);
2196 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2197 struct btrfs_path *path, int slot, int nr);
2199 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2200 struct btrfs_root *root,
2201 struct btrfs_path *path)
2203 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2206 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2207 *root, struct btrfs_key *key, void *data, u32 data_size);
2208 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2209 struct btrfs_root *root,
2210 struct btrfs_path *path,
2211 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2213 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2214 struct btrfs_root *root,
2215 struct btrfs_path *path,
2216 struct btrfs_key *key,
2219 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2222 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2223 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2224 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2225 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2226 struct btrfs_root *root, struct btrfs_path *path,
2227 struct btrfs_key *new_key);
2230 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2231 struct btrfs_root *tree_root,
2232 u64 root_id, u8 type, u64 ref_id,
2233 u64 dirid, u64 sequence,
2234 const char *name, int name_len);
2235 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2236 struct btrfs_key *key);
2237 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2238 *root, struct btrfs_key *key, struct btrfs_root_item
2240 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2241 *root, struct btrfs_key *key, struct btrfs_root_item
2243 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2244 btrfs_root_item *item, struct btrfs_key *key);
2246 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2247 *root, const char *name, int name_len, u64 dir,
2248 struct btrfs_key *location, u8 type, u64 index);
2249 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2250 struct btrfs_root *root,
2251 struct btrfs_path *path, u64 dir,
2252 const char *name, int name_len,
2254 struct btrfs_dir_item *
2255 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *root,
2257 struct btrfs_path *path, u64 dir,
2258 u64 objectid, const char *name, int name_len,
2260 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2261 struct btrfs_path *path,
2262 const char *name, int name_len);
2263 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2264 struct btrfs_root *root,
2265 struct btrfs_path *path,
2266 struct btrfs_dir_item *di);
2267 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2268 struct btrfs_root *root, const char *name,
2269 u16 name_len, const void *data, u16 data_len,
2271 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2272 struct btrfs_root *root,
2273 struct btrfs_path *path, u64 dir,
2274 const char *name, u16 name_len,
2277 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *fs_root,
2279 u64 dirid, u64 *objectid);
2280 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2283 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2284 struct btrfs_root *root,
2285 const char *name, int name_len,
2286 u64 inode_objectid, u64 ref_objectid, u64 index);
2287 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2288 struct btrfs_root *root,
2289 const char *name, int name_len,
2290 u64 inode_objectid, u64 ref_objectid);
2291 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2292 struct btrfs_root *root,
2293 struct btrfs_path *path, u64 objectid);
2294 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2295 *root, u64 objectid, struct btrfs_inode_item
2297 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2298 *root, struct btrfs_path *path,
2299 struct btrfs_key *location, int mod);
2302 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2303 struct btrfs_root *root, u64 bytenr, u64 len);
2304 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *root,
2306 u64 objectid, u64 pos, u64 offset,
2309 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *root, u64 objectid,
2311 u64 offset, char *buffer, size_t size);
2312 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root,
2314 struct btrfs_path *path, u64 objectid,
2315 u64 bytenr, int mod);
2316 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2317 struct btrfs_root *root, u64 alloc_end,
2318 u64 bytenr, char *data, size_t len);
2319 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2320 struct btrfs_root *root,
2321 struct btrfs_path *path,
2322 u64 bytenr, int cow);
2323 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2324 struct btrfs_root *root, struct btrfs_path *path,