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__
24 #if BTRFS_FLAT_INCLUDES
26 #include "kerncompat.h"
27 #include "radix-tree.h"
28 #include "extent-cache.h"
29 #include "extent_io.h"
33 #include <btrfs/list.h>
34 #include <btrfs/kerncompat.h>
35 #include <btrfs/radix-tree.h>
36 #include <btrfs/extent-cache.h>
37 #include <btrfs/extent_io.h>
38 #include <btrfs/ioctl.h>
39 #include <btrfs/sizes.h>
40 #endif /* BTRFS_FLAT_INCLUDES */
43 struct btrfs_trans_handle;
44 struct btrfs_free_space_ctl;
45 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
48 * Fake signature for an unfinalized filesystem, structures might be partially
51 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
53 #define BTRFS_MAX_MIRRORS 3
55 #define BTRFS_MAX_LEVEL 8
57 #define BTRFS_COMPAT_EXTENT_TREE_V0
59 /* holds pointers to all of the tree roots */
60 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
62 /* stores information about which extents are in use, and reference counts */
63 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
66 * chunk tree stores translations from logical -> physical block numbering
67 * the super block points to the chunk tree
69 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
72 * stores information about which areas of a given device are in use.
73 * one per device. The tree of tree roots points to the device tree
75 #define BTRFS_DEV_TREE_OBJECTID 4ULL
77 /* one per subvolume, storing files and directories */
78 #define BTRFS_FS_TREE_OBJECTID 5ULL
80 /* directory objectid inside the root tree */
81 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
82 /* holds checksums of all the data extents */
83 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
84 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
86 /* for storing items that use the BTRFS_UUID_KEY* */
87 #define BTRFS_UUID_TREE_OBJECTID 9ULL
89 /* tracks free space in block groups. */
90 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
92 /* device stats in the device tree */
93 #define BTRFS_DEV_STATS_OBJECTID 0ULL
95 /* for storing balance parameters in the root tree */
96 #define BTRFS_BALANCE_OBJECTID -4ULL
98 /* oprhan objectid for tracking unlinked/truncated files */
99 #define BTRFS_ORPHAN_OBJECTID -5ULL
101 /* does write ahead logging to speed up fsyncs */
102 #define BTRFS_TREE_LOG_OBJECTID -6ULL
103 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
105 /* space balancing */
106 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
107 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
110 * extent checksums all have this objectid
111 * this allows them to share the logging tree
114 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
116 /* For storing free space cache */
117 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
120 * The inode number assigned to the special inode for sotring
123 #define BTRFS_FREE_INO_OBJECTID -12ULL
125 /* dummy objectid represents multiple objectids */
126 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
129 * All files have objectids in this range.
131 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
132 #define BTRFS_LAST_FREE_OBJECTID -256ULL
133 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
138 * the device items go into the chunk tree. The key is in the form
139 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
141 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
143 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2ULL
146 * the max metadata block size. This limit is somewhat artificial,
147 * but the memmove costs go through the roof for larger blocks.
149 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
152 * we can actually store much bigger names, but lets not confuse the rest
155 #define BTRFS_NAME_LEN 255
158 * Theoretical limit is larger, but we keep this down to a sane
159 * value. That should limit greatly the possibility of collisions on
162 #define BTRFS_LINK_MAX 65535U
164 /* 32 bytes in various csum fields */
165 #define BTRFS_CSUM_SIZE 32
168 #define BTRFS_CSUM_TYPE_CRC32 0
170 /* four bytes for CRC32 */
171 static int btrfs_csum_sizes[] = { 4 };
173 #define BTRFS_EMPTY_DIR_SIZE 0
175 #define BTRFS_FT_UNKNOWN 0
176 #define BTRFS_FT_REG_FILE 1
177 #define BTRFS_FT_DIR 2
178 #define BTRFS_FT_CHRDEV 3
179 #define BTRFS_FT_BLKDEV 4
180 #define BTRFS_FT_FIFO 5
181 #define BTRFS_FT_SOCK 6
182 #define BTRFS_FT_SYMLINK 7
183 #define BTRFS_FT_XATTR 8
184 #define BTRFS_FT_MAX 9
186 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
189 * the key defines the order in the tree, and so it also defines (optimal)
190 * block layout. objectid corresponds to the inode number. The flags
191 * tells us things about the object, and is a kind of stream selector.
192 * so for a given inode, keys with flags of 1 might refer to the inode
193 * data, flags of 2 may point to file data in the btree and flags == 3
194 * may point to extents.
196 * offset is the starting byte offset for this key in the stream.
198 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
199 * in cpu native order. Otherwise they are identical and their sizes
200 * should be the same (ie both packed)
202 struct btrfs_disk_key {
206 } __attribute__ ((__packed__));
212 } __attribute__ ((__packed__));
214 struct btrfs_mapping_tree {
215 struct cache_tree cache_tree;
218 #define BTRFS_UUID_SIZE 16
219 struct btrfs_dev_item {
220 /* the internal btrfs device id */
223 /* size of the device */
229 /* optimal io alignment for this device */
232 /* optimal io width for this device */
235 /* minimal io size for this device */
238 /* type and info about this device */
241 /* expected generation for this device */
245 * starting byte of this partition on the device,
246 * to allow for stripe alignment in the future
250 /* grouping information for allocation decisions */
253 /* seek speed 0-100 where 100 is fastest */
256 /* bandwidth 0-100 where 100 is fastest */
259 /* btrfs generated uuid for this device */
260 u8 uuid[BTRFS_UUID_SIZE];
262 /* uuid of FS who owns this device */
263 u8 fsid[BTRFS_UUID_SIZE];
264 } __attribute__ ((__packed__));
266 struct btrfs_stripe {
269 u8 dev_uuid[BTRFS_UUID_SIZE];
270 } __attribute__ ((__packed__));
273 /* size of this chunk in bytes */
276 /* objectid of the root referencing this chunk */
282 /* optimal io alignment for this chunk */
285 /* optimal io width for this chunk */
288 /* minimal io size for this chunk */
291 /* 2^16 stripes is quite a lot, a second limit is the size of a single
296 /* sub stripes only matter for raid10 */
298 struct btrfs_stripe stripe;
299 /* additional stripes go here */
300 } __attribute__ ((__packed__));
302 #define BTRFS_FREE_SPACE_EXTENT 1
303 #define BTRFS_FREE_SPACE_BITMAP 2
305 struct btrfs_free_space_entry {
309 } __attribute__ ((__packed__));
311 struct btrfs_free_space_header {
312 struct btrfs_disk_key location;
316 } __attribute__ ((__packed__));
318 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
320 BUG_ON(num_stripes == 0);
321 return sizeof(struct btrfs_chunk) +
322 sizeof(struct btrfs_stripe) * (num_stripes - 1);
325 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
326 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
327 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
328 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
329 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
330 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
332 #define BTRFS_BACKREF_REV_MAX 256
333 #define BTRFS_BACKREF_REV_SHIFT 56
334 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
335 BTRFS_BACKREF_REV_SHIFT)
337 #define BTRFS_OLD_BACKREF_REV 0
338 #define BTRFS_MIXED_BACKREF_REV 1
341 * every tree block (leaf or node) starts with this header.
343 struct btrfs_header {
344 /* these first four must match the super block */
345 u8 csum[BTRFS_CSUM_SIZE];
346 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
347 __le64 bytenr; /* which block this node is supposed to live in */
350 /* allowed to be different from the super from here on down */
351 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
356 } __attribute__ ((__packed__));
358 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
359 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
360 (__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
363 * this is a very generous portion of the super block, giving us
364 * room to translate 14 chunks with 3 stripes each.
366 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
367 #define BTRFS_LABEL_SIZE 256
370 * just in case we somehow lose the roots and are not able to mount,
371 * we store an array of the roots from previous transactions
374 #define BTRFS_NUM_BACKUP_ROOTS 4
375 struct btrfs_root_backup {
377 __le64 tree_root_gen;
380 __le64 chunk_root_gen;
383 __le64 extent_root_gen;
392 __le64 csum_root_gen;
402 u8 extent_root_level;
406 /* future and to align */
408 } __attribute__ ((__packed__));
411 * the super block basically lists the main trees of the FS
412 * it currently lacks any block count etc etc
414 struct btrfs_super_block {
415 u8 csum[BTRFS_CSUM_SIZE];
416 /* the first 3 fields must match struct btrfs_header */
417 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
418 __le64 bytenr; /* this block number */
421 /* allowed to be different from the btrfs_header from here own down */
428 /* this will help find the new super based on the log root */
429 __le64 log_root_transid;
432 __le64 root_dir_objectid;
436 /* Unused and must be equal to nodesize */
437 __le32 __unused_leafsize;
439 __le32 sys_chunk_array_size;
440 __le64 chunk_root_generation;
442 __le64 compat_ro_flags;
443 __le64 incompat_flags;
448 struct btrfs_dev_item dev_item;
450 char label[BTRFS_LABEL_SIZE];
452 __le64 cache_generation;
453 __le64 uuid_tree_generation;
455 /* future expansion */
457 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
458 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
459 } __attribute__ ((__packed__));
462 * Compat flags that we support. If any incompat flags are set other than the
463 * ones specified below then we will fail to mount
465 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
467 * Older kernels on big-endian systems produced broken free space tree bitmaps,
468 * and btrfs-progs also used to corrupt the free space tree. If this bit is
469 * clear, then the free space tree cannot be trusted. btrfs-progs can also
470 * intentionally clear this bit to ask the kernel to rebuild the free space
473 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
475 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
476 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
477 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
478 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
479 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
482 * older kernels tried to do bigger metadata blocks, but the
483 * code was pretty buggy. Lets not let them try anymore.
485 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
486 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
487 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
488 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
489 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
491 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
494 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
495 * added here until read-write support for the free space tree is implemented in
498 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
500 #define BTRFS_FEATURE_INCOMPAT_SUPP \
501 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
502 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
503 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
504 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
505 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
506 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
507 BTRFS_FEATURE_INCOMPAT_RAID56 | \
508 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
509 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
510 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
513 * A leaf is full of items. offset and size tell us where to find
514 * the item in the leaf (relative to the start of the data area)
517 struct btrfs_disk_key key;
520 } __attribute__ ((__packed__));
523 * leaves have an item area and a data area:
524 * [item0, item1....itemN] [free space] [dataN...data1, data0]
526 * The data is separate from the items to get the keys closer together
530 struct btrfs_header header;
531 struct btrfs_item items[];
532 } __attribute__ ((__packed__));
535 * all non-leaf blocks are nodes, they hold only keys and pointers to
538 struct btrfs_key_ptr {
539 struct btrfs_disk_key key;
542 } __attribute__ ((__packed__));
545 struct btrfs_header header;
546 struct btrfs_key_ptr ptrs[];
547 } __attribute__ ((__packed__));
550 * btrfs_paths remember the path taken from the root down to the leaf.
551 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
552 * to any other levels that are present.
554 * The slots array records the index of the item or block pointer
555 * used while walking the tree.
559 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
560 int slots[BTRFS_MAX_LEVEL];
562 /* The kernel locking sheme is not done in userspace. */
563 int locks[BTRFS_MAX_LEVEL];
566 /* keep some upper locks as we walk down */
570 * set by btrfs_split_item, tells search_slot to keep all locks
571 * and to force calls to keep space in the nodes
578 * items in the extent btree are used to record the objectid of the
579 * owner of the block and the number of references
582 struct btrfs_extent_item {
586 } __attribute__ ((__packed__));
588 struct btrfs_extent_item_v0 {
590 } __attribute__ ((__packed__));
592 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
593 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
594 sizeof(struct btrfs_item))
595 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
597 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
598 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
600 /* following flags only apply to tree blocks */
602 /* use full backrefs for extent pointers in the block*/
603 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
605 struct btrfs_tree_block_info {
606 struct btrfs_disk_key key;
608 } __attribute__ ((__packed__));
610 struct btrfs_extent_data_ref {
615 } __attribute__ ((__packed__));
617 struct btrfs_shared_data_ref {
619 } __attribute__ ((__packed__));
621 struct btrfs_extent_inline_ref {
624 } __attribute__ ((__packed__));
626 struct btrfs_extent_ref_v0 {
631 } __attribute__ ((__packed__));
633 /* dev extents record free space on individual devices. The owner
634 * field points back to the chunk allocation mapping tree that allocated
635 * the extent. The chunk tree uuid field is a way to double check the owner
637 struct btrfs_dev_extent {
639 __le64 chunk_objectid;
642 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
643 } __attribute__ ((__packed__));
645 struct btrfs_inode_ref {
649 } __attribute__ ((__packed__));
651 struct btrfs_inode_extref {
652 __le64 parent_objectid;
655 __u8 name[0]; /* name goes here */
656 } __attribute__ ((__packed__));
658 struct btrfs_timespec {
661 } __attribute__ ((__packed__));
664 BTRFS_COMPRESS_NONE = 0,
665 BTRFS_COMPRESS_ZLIB = 1,
666 BTRFS_COMPRESS_LZO = 2,
667 BTRFS_COMPRESS_ZSTD = 3,
668 BTRFS_COMPRESS_TYPES = 3,
669 BTRFS_COMPRESS_LAST = 4,
670 } btrfs_compression_type;
672 /* we don't understand any encryption methods right now */
674 BTRFS_ENCRYPTION_NONE = 0,
675 BTRFS_ENCRYPTION_LAST = 1,
676 } btrfs_encryption_type;
678 enum btrfs_tree_block_status {
679 BTRFS_TREE_BLOCK_CLEAN,
680 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
681 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
682 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
683 BTRFS_TREE_BLOCK_INVALID_LEVEL,
684 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
685 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
688 struct btrfs_inode_item {
689 /* nfs style generation number */
691 /* transid that last touched this inode */
703 /* modification sequence number for NFS */
707 * a little future expansion, for more than this we can
708 * just grow the inode item and version it
711 struct btrfs_timespec atime;
712 struct btrfs_timespec ctime;
713 struct btrfs_timespec mtime;
714 struct btrfs_timespec otime;
715 } __attribute__ ((__packed__));
717 struct btrfs_dir_log_item {
719 } __attribute__ ((__packed__));
721 struct btrfs_dir_item {
722 struct btrfs_disk_key location;
727 } __attribute__ ((__packed__));
729 struct btrfs_root_item_v0 {
730 struct btrfs_inode_item inode;
736 __le64 last_snapshot;
739 struct btrfs_disk_key drop_progress;
742 } __attribute__ ((__packed__));
744 struct btrfs_root_item {
745 struct btrfs_inode_item inode;
751 __le64 last_snapshot;
754 struct btrfs_disk_key drop_progress;
759 * The following fields appear after subvol_uuids+subvol_times
764 * This generation number is used to test if the new fields are valid
765 * and up to date while reading the root item. Every time the root item
766 * is written out, the "generation" field is copied into this field. If
767 * anyone ever mounted the fs with an older kernel, we will have
768 * mismatching generation values here and thus must invalidate the
769 * new fields. See btrfs_update_root and btrfs_find_last_root for
771 * the offset of generation_v2 is also used as the start for the memset
772 * when invalidating the fields.
774 __le64 generation_v2;
775 u8 uuid[BTRFS_UUID_SIZE];
776 u8 parent_uuid[BTRFS_UUID_SIZE];
777 u8 received_uuid[BTRFS_UUID_SIZE];
778 __le64 ctransid; /* updated when an inode changes */
779 __le64 otransid; /* trans when created */
780 __le64 stransid; /* trans when sent. non-zero for received subvol */
781 __le64 rtransid; /* trans when received. non-zero for received subvol */
782 struct btrfs_timespec ctime;
783 struct btrfs_timespec otime;
784 struct btrfs_timespec stime;
785 struct btrfs_timespec rtime;
786 __le64 reserved[8]; /* for future */
787 } __attribute__ ((__packed__));
790 * this is used for both forward and backward root refs
792 struct btrfs_root_ref {
796 } __attribute__ ((__packed__));
798 struct btrfs_disk_balance_args {
800 * profiles to operate on, single is denoted by
801 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
807 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
808 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
821 /* devid subset filter [pstart..pend) */
825 /* btrfs virtual address space subset filter [vstart..vend) */
830 * profile to convert to, single is denoted by
831 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
835 /* BTRFS_BALANCE_ARGS_* */
839 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
840 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
852 * Process chunks that cross stripes_min..stripes_max devices,
853 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
859 } __attribute__ ((__packed__));
862 * store balance parameters to disk so that balance can be properly
863 * resumed after crash or unmount
865 struct btrfs_balance_item {
866 /* BTRFS_BALANCE_* */
869 struct btrfs_disk_balance_args data;
870 struct btrfs_disk_balance_args meta;
871 struct btrfs_disk_balance_args sys;
874 } __attribute__ ((__packed__));
876 #define BTRFS_FILE_EXTENT_INLINE 0
877 #define BTRFS_FILE_EXTENT_REG 1
878 #define BTRFS_FILE_EXTENT_PREALLOC 2
880 struct btrfs_file_extent_item {
882 * transaction id that created this extent
886 * max number of bytes to hold this extent in ram
887 * when we split a compressed extent we can't know how big
888 * each of the resulting pieces will be. So, this is
889 * an upper limit on the size of the extent in ram instead of
895 * 32 bits for the various ways we might encode the data,
896 * including compression and encryption. If any of these
897 * are set to something a given disk format doesn't understand
898 * it is treated like an incompat flag for reading and writing,
903 __le16 other_encoding; /* spare for later use */
905 /* are we inline data or a real extent? */
909 * disk space consumed by the extent, checksum blocks are included
913 __le64 disk_num_bytes;
915 * the logical offset in file blocks (no csums)
916 * this extent record is for. This allows a file extent to point
917 * into the middle of an existing extent on disk, sharing it
918 * between two snapshots (useful if some bytes in the middle of the
919 * extent have changed
923 * the logical number of file blocks (no csums included)
927 } __attribute__ ((__packed__));
929 struct btrfs_dev_stats_item {
931 * grow this item struct at the end for future enhancements and keep
932 * the existing values unchanged
934 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
935 } __attribute__ ((__packed__));
937 struct btrfs_csum_item {
939 } __attribute__ ((__packed__));
942 * We don't want to overwrite 1M at the beginning of device, even though
943 * there is our 1st superblock at 64k. Some possible reasons:
944 * - the first 64k blank is useful for some boot loader/manager
945 * - the first 1M could be scratched by buggy partitioner or somesuch
947 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
949 /* tag for the radix tree of block groups in ram */
950 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
951 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
952 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
953 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
954 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
955 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
956 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
957 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
958 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
959 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
961 enum btrfs_raid_types {
972 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
973 BTRFS_BLOCK_GROUP_SYSTEM | \
974 BTRFS_BLOCK_GROUP_METADATA)
976 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
977 BTRFS_BLOCK_GROUP_RAID1 | \
978 BTRFS_BLOCK_GROUP_RAID5 | \
979 BTRFS_BLOCK_GROUP_RAID6 | \
980 BTRFS_BLOCK_GROUP_DUP | \
981 BTRFS_BLOCK_GROUP_RAID10)
983 /* used in struct btrfs_balance_args fields */
984 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
987 * GLOBAL_RSV does not exist as a on-disk block group type and is used
988 * internally for exporting info about global block reserve from space infos
990 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
992 #define BTRFS_QGROUP_LEVEL_SHIFT 48
994 static inline u64 btrfs_qgroup_level(u64 qgroupid)
996 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
999 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
1001 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1004 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1005 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1006 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1008 struct btrfs_qgroup_status_item {
1012 __le64 rescan; /* progress during scanning */
1013 } __attribute__ ((__packed__));
1015 struct btrfs_block_group_item {
1017 __le64 chunk_objectid;
1019 } __attribute__ ((__packed__));
1021 struct btrfs_free_space_info {
1022 __le32 extent_count;
1024 } __attribute__ ((__packed__));
1026 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1028 struct btrfs_qgroup_info_item {
1031 __le64 referenced_compressed;
1033 __le64 exclusive_compressed;
1034 } __attribute__ ((__packed__));
1036 /* flags definition for qgroup limits */
1037 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1038 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1039 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1040 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1041 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1042 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1044 struct btrfs_qgroup_limit_item {
1046 __le64 max_referenced;
1047 __le64 max_exclusive;
1048 __le64 rsv_referenced;
1049 __le64 rsv_exclusive;
1050 } __attribute__ ((__packed__));
1052 struct btrfs_space_info {
1058 struct list_head list;
1061 struct btrfs_block_group_cache {
1062 struct cache_extent cache;
1063 struct btrfs_key key;
1064 struct btrfs_block_group_item item;
1065 struct btrfs_space_info *space_info;
1066 struct btrfs_free_space_ctl *free_space_ctl;
1074 struct btrfs_device;
1075 struct btrfs_fs_devices;
1076 struct btrfs_fs_info {
1077 u8 fsid[BTRFS_FSID_SIZE];
1079 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1080 u8 *new_chunk_tree_uuid;
1081 struct btrfs_root *fs_root;
1082 struct btrfs_root *extent_root;
1083 struct btrfs_root *tree_root;
1084 struct btrfs_root *chunk_root;
1085 struct btrfs_root *dev_root;
1086 struct btrfs_root *csum_root;
1087 struct btrfs_root *quota_root;
1088 struct btrfs_root *free_space_root;
1090 struct rb_root fs_root_tree;
1092 /* the log root tree is a directory of all the other log roots */
1093 struct btrfs_root *log_root_tree;
1095 struct extent_io_tree extent_cache;
1096 struct extent_io_tree free_space_cache;
1097 struct extent_io_tree block_group_cache;
1098 struct extent_io_tree pinned_extents;
1099 struct extent_io_tree pending_del;
1100 struct extent_io_tree extent_ins;
1101 struct extent_io_tree *excluded_extents;
1103 /* logical->physical extent mapping */
1104 struct btrfs_mapping_tree mapping_tree;
1107 u64 last_trans_committed;
1109 u64 avail_data_alloc_bits;
1110 u64 avail_metadata_alloc_bits;
1111 u64 avail_system_alloc_bits;
1112 u64 data_alloc_profile;
1113 u64 metadata_alloc_profile;
1114 u64 system_alloc_profile;
1117 struct btrfs_trans_handle *running_transaction;
1118 struct btrfs_super_block *super_copy;
1119 struct mutex fs_mutex;
1124 struct list_head dirty_cowonly_roots;
1125 struct list_head recow_ebs;
1127 struct btrfs_fs_devices *fs_devices;
1128 struct list_head space_info;
1130 unsigned int system_allocs:1;
1131 unsigned int readonly:1;
1132 unsigned int on_restoring:1;
1133 unsigned int is_chunk_recover:1;
1134 unsigned int quota_enabled:1;
1135 unsigned int suppress_check_block_errors:1;
1136 unsigned int ignore_fsid_mismatch:1;
1137 unsigned int ignore_chunk_tree_error:1;
1138 unsigned int avoid_meta_chunk_alloc:1;
1139 unsigned int avoid_sys_chunk_alloc:1;
1140 unsigned int finalize_on_close:1;
1142 int transaction_aborted;
1144 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1145 struct btrfs_root *root,
1146 u64 bytenr, u64 num_bytes, u64 parent,
1147 u64 root_objectid, u64 owner, u64 offset,
1149 struct cache_tree *fsck_extent_cache;
1150 struct cache_tree *corrupt_blocks;
1152 /* Cached block sizes */
1159 * in ram representation of the tree. extent_root is used for all allocations
1160 * and for the extent tree extent_root root.
1163 struct extent_buffer *node;
1164 struct extent_buffer *commit_root;
1165 struct btrfs_root_item root_item;
1166 struct btrfs_key root_key;
1167 struct btrfs_fs_info *fs_info;
1176 u64 last_inode_alloc;
1179 * Record orphan data extent ref
1181 * TODO: Don't restore things in btrfs_root.
1182 * Directly record it into inode_record, which needs a lot of
1183 * infrastructure change to allow cooperation between extent
1186 struct list_head orphan_data_extents;
1188 /* the dirty list is only used by non-reference counted roots */
1189 struct list_head dirty_list;
1190 struct rb_node rb_node;
1193 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1195 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1198 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1200 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1203 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1204 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1205 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1207 return BTRFS_MAX_ITEM_SIZE(info) -
1208 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1211 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1213 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1217 * inode items have the data typically returned from stat and store other
1218 * info about object characteristics. There is one for every file and dir in
1221 #define BTRFS_INODE_ITEM_KEY 1
1222 #define BTRFS_INODE_REF_KEY 12
1223 #define BTRFS_INODE_EXTREF_KEY 13
1224 #define BTRFS_XATTR_ITEM_KEY 24
1225 #define BTRFS_ORPHAN_ITEM_KEY 48
1227 #define BTRFS_DIR_LOG_ITEM_KEY 60
1228 #define BTRFS_DIR_LOG_INDEX_KEY 72
1230 * dir items are the name -> inode pointers in a directory. There is one
1231 * for every name in a directory.
1233 #define BTRFS_DIR_ITEM_KEY 84
1234 #define BTRFS_DIR_INDEX_KEY 96
1237 * extent data is for file data
1239 #define BTRFS_EXTENT_DATA_KEY 108
1242 * csum items have the checksums for data in the extents
1244 #define BTRFS_CSUM_ITEM_KEY 120
1246 * extent csums are stored in a separate tree and hold csums for
1247 * an entire extent on disk.
1249 #define BTRFS_EXTENT_CSUM_KEY 128
1252 * root items point to tree roots. There are typically in the root
1253 * tree used by the super block to find all the other trees
1255 #define BTRFS_ROOT_ITEM_KEY 132
1258 * root backrefs tie subvols and snapshots to the directory entries that
1261 #define BTRFS_ROOT_BACKREF_KEY 144
1264 * root refs make a fast index for listing all of the snapshots and
1265 * subvolumes referenced by a given root. They point directly to the
1266 * directory item in the root that references the subvol
1268 #define BTRFS_ROOT_REF_KEY 156
1271 * extent items are in the extent map tree. These record which blocks
1272 * are used, and how many references there are to each block
1274 #define BTRFS_EXTENT_ITEM_KEY 168
1277 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1278 * the length, so we save the level in key->offset instead of the length.
1280 #define BTRFS_METADATA_ITEM_KEY 169
1282 #define BTRFS_TREE_BLOCK_REF_KEY 176
1284 #define BTRFS_EXTENT_DATA_REF_KEY 178
1286 /* old style extent backrefs */
1287 #define BTRFS_EXTENT_REF_V0_KEY 180
1289 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1291 #define BTRFS_SHARED_DATA_REF_KEY 184
1295 * block groups give us hints into the extent allocation trees. Which
1296 * blocks are free etc etc
1298 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1301 * Every block group is represented in the free space tree by a free space info
1302 * item, which stores some accounting information. It is keyed on
1303 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1305 #define BTRFS_FREE_SPACE_INFO_KEY 198
1308 * A free space extent tracks an extent of space that is free in a block group.
1309 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1311 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1314 * When a block group becomes very fragmented, we convert it to use bitmaps
1315 * instead of extents. A free space bitmap is keyed on
1316 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1317 * (length / sectorsize) bits.
1319 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1321 #define BTRFS_DEV_EXTENT_KEY 204
1322 #define BTRFS_DEV_ITEM_KEY 216
1323 #define BTRFS_CHUNK_ITEM_KEY 228
1325 #define BTRFS_BALANCE_ITEM_KEY 248
1330 #define BTRFS_QGROUP_STATUS_KEY 240
1331 #define BTRFS_QGROUP_INFO_KEY 242
1332 #define BTRFS_QGROUP_LIMIT_KEY 244
1333 #define BTRFS_QGROUP_RELATION_KEY 246
1336 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1338 #define BTRFS_BALANCE_ITEM_KEY 248
1341 * The key type for tree items that are stored persistently, but do not need to
1342 * exist for extended period of time. The items can exist in any tree.
1344 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1348 * - balance status item
1349 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1351 #define BTRFS_TEMPORARY_ITEM_KEY 248
1354 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1356 #define BTRFS_DEV_STATS_KEY 249
1359 * The key type for tree items that are stored persistently and usually exist
1360 * for a long period, eg. filesystem lifetime. The item kinds can be status
1361 * information, stats or preference values. The item can exist in any tree.
1363 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1367 * - device statistics, store IO stats in the device tree, one key for all
1369 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1371 #define BTRFS_PERSISTENT_ITEM_KEY 249
1374 * Persistently stores the device replace state in the device tree.
1375 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1377 #define BTRFS_DEV_REPLACE_KEY 250
1380 * Stores items that allow to quickly map UUIDs to something else.
1381 * These items are part of the filesystem UUID tree.
1382 * The key is built like this:
1383 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1385 #if BTRFS_UUID_SIZE != 16
1386 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1388 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1389 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1390 * received subvols */
1393 * string items are for debugging. They just store a short string of
1396 #define BTRFS_STRING_ITEM_KEY 253
1400 #define BTRFS_INODE_NODATASUM (1 << 0)
1401 #define BTRFS_INODE_NODATACOW (1 << 1)
1402 #define BTRFS_INODE_READONLY (1 << 2)
1403 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1404 #define BTRFS_INODE_PREALLOC (1 << 4)
1405 #define BTRFS_INODE_SYNC (1 << 5)
1406 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1407 #define BTRFS_INODE_APPEND (1 << 7)
1408 #define BTRFS_INODE_NODUMP (1 << 8)
1409 #define BTRFS_INODE_NOATIME (1 << 9)
1410 #define BTRFS_INODE_DIRSYNC (1 << 10)
1411 #define BTRFS_INODE_COMPRESS (1 << 11)
1413 #define read_eb_member(eb, ptr, type, member, result) ( \
1414 read_extent_buffer(eb, (char *)(result), \
1415 ((unsigned long)(ptr)) + \
1416 offsetof(type, member), \
1417 sizeof(((type *)0)->member)))
1419 #define write_eb_member(eb, ptr, type, member, result) ( \
1420 write_extent_buffer(eb, (char *)(result), \
1421 ((unsigned long)(ptr)) + \
1422 offsetof(type, member), \
1423 sizeof(((type *)0)->member)))
1425 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1426 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1428 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1429 return le##bits##_to_cpu(h->member); \
1431 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1434 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1435 h->member = cpu_to_le##bits(val); \
1438 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1439 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1442 unsigned long offset = (unsigned long)s; \
1443 const type *p = (type *) (eb->data + offset); \
1444 return get_unaligned_le##bits(&p->member); \
1446 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1447 type *s, u##bits val) \
1449 unsigned long offset = (unsigned long)s; \
1450 type *p = (type *) (eb->data + offset); \
1451 put_unaligned_le##bits(val, &p->member); \
1454 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1455 static inline u##bits btrfs_##name(const type *s) \
1457 return le##bits##_to_cpu(s->member); \
1459 static inline void btrfs_set_##name(type *s, u##bits val) \
1461 s->member = cpu_to_le##bits(val); \
1464 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1465 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1466 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1467 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1468 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1469 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1471 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1472 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1473 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1474 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1475 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1476 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1481 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1483 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1485 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1487 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1489 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1490 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1492 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1494 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1496 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1499 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1501 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1504 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1506 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1509 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1510 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1511 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1512 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1513 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1514 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1515 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1516 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1517 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1518 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1519 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1521 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1523 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1526 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1528 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1530 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1532 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1534 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1536 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1537 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1539 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1541 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1542 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1544 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1547 unsigned long offset = (unsigned long)c;
1548 offset += offsetof(struct btrfs_chunk, stripe);
1549 offset += nr * sizeof(struct btrfs_stripe);
1550 return (struct btrfs_stripe *)offset;
1553 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1555 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1558 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1559 struct btrfs_chunk *c, int nr)
1561 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1564 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1565 struct btrfs_chunk *c, int nr,
1568 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1571 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1572 struct btrfs_chunk *c, int nr)
1574 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1577 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1578 struct btrfs_chunk *c, int nr,
1581 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1584 /* struct btrfs_block_group_item */
1585 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1587 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1589 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1590 struct btrfs_block_group_item, chunk_objectid, 64);
1592 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1593 struct btrfs_block_group_item, chunk_objectid, 64);
1594 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1595 struct btrfs_block_group_item, flags, 64);
1596 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1597 struct btrfs_block_group_item, flags, 64);
1599 /* struct btrfs_free_space_info */
1600 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1602 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1604 /* struct btrfs_inode_ref */
1605 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1606 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1607 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1609 /* struct btrfs_inode_extref */
1610 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1611 parent_objectid, 64);
1612 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1614 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1616 /* struct btrfs_inode_item */
1617 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1618 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1619 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1620 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1621 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1622 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1623 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1624 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1625 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1626 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1627 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1628 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1631 struct btrfs_inode_item, generation, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1633 struct btrfs_inode_item, sequence, 64);
1634 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1635 struct btrfs_inode_item, transid, 64);
1636 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1637 struct btrfs_inode_item, size, 64);
1638 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1639 struct btrfs_inode_item, nbytes, 64);
1640 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1641 struct btrfs_inode_item, block_group, 64);
1642 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1643 struct btrfs_inode_item, nlink, 32);
1644 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1645 struct btrfs_inode_item, uid, 32);
1646 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1647 struct btrfs_inode_item, gid, 32);
1648 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1649 struct btrfs_inode_item, mode, 32);
1650 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1651 struct btrfs_inode_item, rdev, 64);
1652 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1653 struct btrfs_inode_item, flags, 64);
1655 static inline struct btrfs_timespec *
1656 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1658 unsigned long ptr = (unsigned long)inode_item;
1659 ptr += offsetof(struct btrfs_inode_item, atime);
1660 return (struct btrfs_timespec *)ptr;
1663 static inline struct btrfs_timespec *
1664 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1666 unsigned long ptr = (unsigned long)inode_item;
1667 ptr += offsetof(struct btrfs_inode_item, mtime);
1668 return (struct btrfs_timespec *)ptr;
1671 static inline struct btrfs_timespec *
1672 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1674 unsigned long ptr = (unsigned long)inode_item;
1675 ptr += offsetof(struct btrfs_inode_item, ctime);
1676 return (struct btrfs_timespec *)ptr;
1679 static inline struct btrfs_timespec *
1680 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1682 unsigned long ptr = (unsigned long)inode_item;
1683 ptr += offsetof(struct btrfs_inode_item, otime);
1684 return (struct btrfs_timespec *)ptr;
1687 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1688 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1689 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1691 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1694 /* struct btrfs_dev_extent */
1695 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1697 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1698 chunk_objectid, 64);
1699 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1701 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1706 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1708 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1709 return (u8 *)((unsigned long)dev + ptr);
1713 /* struct btrfs_extent_item */
1714 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1715 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1716 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1718 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1719 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1721 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1723 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1725 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1726 struct btrfs_tree_block_info *item,
1727 struct btrfs_disk_key *key)
1729 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1732 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1733 struct btrfs_tree_block_info *item,
1734 struct btrfs_disk_key *key)
1736 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1739 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1741 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1743 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1745 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1748 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1751 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1753 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1755 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1756 struct btrfs_extent_inline_ref, type, 8);
1757 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1758 struct btrfs_extent_inline_ref, offset, 64);
1760 static inline u32 btrfs_extent_inline_ref_size(int type)
1762 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1763 type == BTRFS_SHARED_BLOCK_REF_KEY)
1764 return sizeof(struct btrfs_extent_inline_ref);
1765 if (type == BTRFS_SHARED_DATA_REF_KEY)
1766 return sizeof(struct btrfs_shared_data_ref) +
1767 sizeof(struct btrfs_extent_inline_ref);
1768 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1769 return sizeof(struct btrfs_extent_data_ref) +
1770 offsetof(struct btrfs_extent_inline_ref, offset);
1775 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1776 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1778 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1779 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1781 /* struct btrfs_node */
1782 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1783 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1785 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1788 ptr = offsetof(struct btrfs_node, ptrs) +
1789 sizeof(struct btrfs_key_ptr) * nr;
1790 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1793 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1797 ptr = offsetof(struct btrfs_node, ptrs) +
1798 sizeof(struct btrfs_key_ptr) * nr;
1799 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1802 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1805 ptr = offsetof(struct btrfs_node, ptrs) +
1806 sizeof(struct btrfs_key_ptr) * nr;
1807 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1810 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1814 ptr = offsetof(struct btrfs_node, ptrs) +
1815 sizeof(struct btrfs_key_ptr) * nr;
1816 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1819 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1821 return offsetof(struct btrfs_node, ptrs) +
1822 sizeof(struct btrfs_key_ptr) * nr;
1825 static inline void btrfs_node_key(struct extent_buffer *eb,
1826 struct btrfs_disk_key *disk_key, int nr)
1829 ptr = btrfs_node_key_ptr_offset(nr);
1830 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1831 struct btrfs_key_ptr, key, disk_key);
1834 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1835 struct btrfs_disk_key *disk_key, int nr)
1838 ptr = btrfs_node_key_ptr_offset(nr);
1839 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1840 struct btrfs_key_ptr, key, disk_key);
1843 /* struct btrfs_item */
1844 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1845 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1847 static inline unsigned long btrfs_item_nr_offset(int nr)
1849 return offsetof(struct btrfs_leaf, items) +
1850 sizeof(struct btrfs_item) * nr;
1853 static inline struct btrfs_item *btrfs_item_nr(int nr)
1855 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1858 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1859 struct btrfs_item *item)
1861 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1864 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1866 return btrfs_item_end(eb, btrfs_item_nr(nr));
1869 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1871 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1874 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1876 return btrfs_item_size(eb, btrfs_item_nr(nr));
1879 static inline void btrfs_item_key(struct extent_buffer *eb,
1880 struct btrfs_disk_key *disk_key, int nr)
1882 struct btrfs_item *item = btrfs_item_nr(nr);
1883 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1886 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1887 struct btrfs_disk_key *disk_key, int nr)
1889 struct btrfs_item *item = btrfs_item_nr(nr);
1890 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1893 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1896 * struct btrfs_root_ref
1898 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1899 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1900 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1902 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1903 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1904 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1906 /* struct btrfs_dir_item */
1907 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1908 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1909 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1910 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1912 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1913 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1914 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1915 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1917 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1918 struct btrfs_dir_item *item,
1919 struct btrfs_disk_key *key)
1921 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1924 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1925 struct btrfs_dir_item *item,
1926 struct btrfs_disk_key *key)
1928 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1931 /* struct btrfs_free_space_header */
1932 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1934 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1936 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1939 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1940 struct btrfs_free_space_header *h,
1941 struct btrfs_disk_key *key)
1943 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1946 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1947 struct btrfs_free_space_header *h,
1948 struct btrfs_disk_key *key)
1950 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1953 /* struct btrfs_disk_key */
1954 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1956 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1957 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1959 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1960 struct btrfs_disk_key *disk)
1962 cpu->offset = le64_to_cpu(disk->offset);
1963 cpu->type = disk->type;
1964 cpu->objectid = le64_to_cpu(disk->objectid);
1967 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1968 struct btrfs_key *cpu)
1970 disk->offset = cpu_to_le64(cpu->offset);
1971 disk->type = cpu->type;
1972 disk->objectid = cpu_to_le64(cpu->objectid);
1975 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1976 struct btrfs_key *key, int nr)
1978 struct btrfs_disk_key disk_key;
1979 btrfs_node_key(eb, &disk_key, nr);
1980 btrfs_disk_key_to_cpu(key, &disk_key);
1983 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1984 struct btrfs_key *key, int nr)
1986 struct btrfs_disk_key disk_key;
1987 btrfs_item_key(eb, &disk_key, nr);
1988 btrfs_disk_key_to_cpu(key, &disk_key);
1991 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1992 struct btrfs_dir_item *item,
1993 struct btrfs_key *key)
1995 struct btrfs_disk_key disk_key;
1996 btrfs_dir_item_key(eb, item, &disk_key);
1997 btrfs_disk_key_to_cpu(key, &disk_key);
2000 /* struct btrfs_header */
2001 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
2002 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
2004 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
2005 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
2006 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
2007 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
2008 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2009 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
2011 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2012 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2015 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2017 return (btrfs_header_flags(eb) & flag) == flag;
2020 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2022 u64 flags = btrfs_header_flags(eb);
2023 btrfs_set_header_flags(eb, flags | flag);
2024 return (flags & flag) == flag;
2027 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2029 u64 flags = btrfs_header_flags(eb);
2030 btrfs_set_header_flags(eb, flags & ~flag);
2031 return (flags & flag) == flag;
2034 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2036 u64 flags = btrfs_header_flags(eb);
2037 return flags >> BTRFS_BACKREF_REV_SHIFT;
2040 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2043 u64 flags = btrfs_header_flags(eb);
2044 flags &= ~BTRFS_BACKREF_REV_MASK;
2045 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2046 btrfs_set_header_flags(eb, flags);
2049 static inline unsigned long btrfs_header_fsid(void)
2051 return offsetof(struct btrfs_header, fsid);
2054 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2056 return offsetof(struct btrfs_header, chunk_tree_uuid);
2059 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2061 unsigned long ptr = offsetof(struct btrfs_header, csum);
2065 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2067 return (btrfs_header_level(eb) == 0);
2070 /* struct btrfs_root_item */
2071 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2073 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2074 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2075 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2077 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2079 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2080 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2081 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2082 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2083 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2084 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2085 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2086 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2088 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2090 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2092 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2094 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2096 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2099 static inline struct btrfs_timespec* btrfs_root_ctime(
2100 struct btrfs_root_item *root_item)
2102 unsigned long ptr = (unsigned long)root_item;
2103 ptr += offsetof(struct btrfs_root_item, ctime);
2104 return (struct btrfs_timespec *)ptr;
2107 static inline struct btrfs_timespec* btrfs_root_otime(
2108 struct btrfs_root_item *root_item)
2110 unsigned long ptr = (unsigned long)root_item;
2111 ptr += offsetof(struct btrfs_root_item, otime);
2112 return (struct btrfs_timespec *)ptr;
2115 static inline struct btrfs_timespec* btrfs_root_stime(
2116 struct btrfs_root_item *root_item)
2118 unsigned long ptr = (unsigned long)root_item;
2119 ptr += offsetof(struct btrfs_root_item, stime);
2120 return (struct btrfs_timespec *)ptr;
2123 static inline struct btrfs_timespec* btrfs_root_rtime(
2124 struct btrfs_root_item *root_item)
2126 unsigned long ptr = (unsigned long)root_item;
2127 ptr += offsetof(struct btrfs_root_item, rtime);
2128 return (struct btrfs_timespec *)ptr;
2131 /* struct btrfs_root_backup */
2132 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2134 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2136 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2137 tree_root_level, 8);
2139 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2141 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2142 chunk_root_gen, 64);
2143 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2144 chunk_root_level, 8);
2146 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2148 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2149 extent_root_gen, 64);
2150 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2151 extent_root_level, 8);
2153 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2160 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2164 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2167 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2169 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2171 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2172 csum_root_level, 8);
2173 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2175 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2177 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2180 /* struct btrfs_super_block */
2182 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2183 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2184 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2186 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2187 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2188 struct btrfs_super_block, sys_chunk_array_size, 32);
2189 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2190 struct btrfs_super_block, chunk_root_generation, 64);
2191 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2193 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2195 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2196 chunk_root_level, 8);
2197 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2199 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2200 log_root_transid, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2203 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2205 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2207 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2209 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2211 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2213 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2214 root_dir_objectid, 64);
2215 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2217 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2219 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2220 compat_ro_flags, 64);
2221 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2222 incompat_flags, 64);
2223 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2225 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2226 cache_generation, 64);
2227 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2228 uuid_tree_generation, 64);
2229 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2231 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2233 int t = btrfs_super_csum_type(s);
2234 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2235 return btrfs_csum_sizes[t];
2238 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2240 return offsetof(struct btrfs_leaf, items);
2243 /* struct btrfs_file_extent_item */
2244 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2245 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2247 static inline unsigned long btrfs_file_extent_inline_start(struct
2248 btrfs_file_extent_item *e)
2250 unsigned long offset = (unsigned long)e;
2251 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2255 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2257 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2260 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2268 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2269 disk_num_bytes, 64);
2270 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2272 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2274 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2276 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2278 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2280 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2282 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2284 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2286 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2288 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2289 other_encoding, 16);
2291 /* btrfs_qgroup_status_item */
2292 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2294 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2296 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2298 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2301 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2302 struct btrfs_qgroup_status_item, version, 64);
2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2304 struct btrfs_qgroup_status_item, generation, 64);
2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2306 struct btrfs_qgroup_status_item, flags, 64);
2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2308 struct btrfs_qgroup_status_item, rescan, 64);
2310 /* btrfs_qgroup_info_item */
2311 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2313 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2315 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2316 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2317 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2319 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2320 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2322 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2323 struct btrfs_qgroup_info_item, generation, 64);
2324 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2325 struct btrfs_qgroup_info_item, referenced, 64);
2326 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2327 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2328 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2329 struct btrfs_qgroup_info_item, exclusive, 64);
2330 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2331 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2333 /* btrfs_qgroup_limit_item */
2334 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2336 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2337 max_referenced, 64);
2338 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2340 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2341 rsv_referenced, 64);
2342 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2345 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2346 struct btrfs_qgroup_limit_item, flags, 64);
2347 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2348 struct btrfs_qgroup_limit_item, max_referenced, 64);
2349 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2350 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2351 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2352 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2353 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2354 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2356 /* btrfs_balance_item */
2357 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2359 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2360 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2362 unsigned long offset = (unsigned long)bi;
2363 struct btrfs_balance_item *p;
2364 p = (struct btrfs_balance_item *)(eb->data + offset);
2368 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2369 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2371 unsigned long offset = (unsigned long)bi;
2372 struct btrfs_balance_item *p;
2373 p = (struct btrfs_balance_item *)(eb->data + offset);
2377 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2378 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2380 unsigned long offset = (unsigned long)bi;
2381 struct btrfs_balance_item *p;
2382 p = (struct btrfs_balance_item *)(eb->data + offset);
2387 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2388 * endiannes conversion, @dsi is offset to eb data
2390 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2391 struct btrfs_dev_stats_item *dsi)
2393 unsigned long offset = (unsigned long)dsi;
2394 struct btrfs_dev_stats_item *p;
2395 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2400 * this returns the number of bytes used by the item on disk, minus the
2401 * size of any extent headers. If a file is compressed on disk, this is
2402 * the compressed size
2404 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2405 struct btrfs_item *e)
2407 unsigned long offset;
2408 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2409 return btrfs_item_size(eb, e) - offset;
2412 /* struct btrfs_ioctl_search_header */
2413 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2415 return get_unaligned_64(&sh->transid);
2418 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2420 return get_unaligned_64(&sh->objectid);
2423 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2425 return get_unaligned_64(&sh->offset);
2428 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2430 return get_unaligned_32(&sh->type);
2433 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2435 return get_unaligned_32(&sh->len);
2438 /* this returns the number of file bytes represented by the inline item.
2439 * If an item is compressed, this is the uncompressed size
2441 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2443 struct btrfs_file_extent_item *fi)
2446 * return the space used on disk if this item isn't
2447 * compressed or encoded
2449 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2450 btrfs_file_extent_encryption(eb, fi) == 0 &&
2451 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2452 return btrfs_file_extent_inline_item_len(eb,
2453 btrfs_item_nr(slot));
2456 /* otherwise use the ram bytes field */
2457 return btrfs_file_extent_ram_bytes(eb, fi);
2460 #define btrfs_fs_incompat(fs_info, opt) \
2461 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2463 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2465 struct btrfs_super_block *disk_super;
2466 disk_super = fs_info->super_copy;
2467 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2470 #define btrfs_fs_compat_ro(fs_info, opt) \
2471 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2473 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2475 struct btrfs_super_block *disk_super;
2476 disk_super = fs_info->super_copy;
2477 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2480 /* helper function to cast into the data area of the leaf. */
2481 #define btrfs_item_ptr(leaf, slot, type) \
2482 ((type *)(btrfs_leaf_data(leaf) + \
2483 btrfs_item_offset_nr(leaf, slot)))
2485 #define btrfs_item_ptr_offset(leaf, slot) \
2486 ((unsigned long)(btrfs_leaf_data(leaf) + \
2487 btrfs_item_offset_nr(leaf, slot)))
2490 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root,
2492 u64 num_bytes, u64 empty_size,
2493 u64 hint_byte, u64 search_end,
2494 struct btrfs_key *ins, bool is_data);
2495 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2496 struct btrfs_root *root);
2497 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2498 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2499 u64 bytenr, u64 num_bytes);
2500 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2501 struct btrfs_root *root);
2502 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2503 btrfs_fs_info *info,
2505 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2506 btrfs_fs_info *info,
2508 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2509 struct btrfs_root *root,
2510 u32 blocksize, u64 root_objectid,
2511 struct btrfs_disk_key *key, int level,
2512 u64 hint, u64 empty_size);
2513 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2514 struct btrfs_root *root, u64 bytenr,
2515 u64 offset, int metadata, u64 *refs, u64 *flags);
2516 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2517 struct btrfs_root *root,
2518 u64 bytenr, int level, u64 flags);
2519 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2520 struct extent_buffer *buf, int record_parent);
2521 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2522 struct extent_buffer *buf, int record_parent);
2523 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *root,
2525 struct extent_buffer *buf,
2526 u64 parent, int last_ref);
2527 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2528 struct btrfs_root *root,
2529 u64 bytenr, u64 num_bytes, u64 parent,
2530 u64 root_objectid, u64 owner, u64 offset);
2531 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2532 struct btrfs_root *root,
2533 struct extent_io_tree *unpin);
2534 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2535 struct btrfs_root *root,
2536 u64 bytenr, u64 num_bytes, u64 parent,
2537 u64 root_objectid, u64 ref_generation,
2538 u64 owner_objectid);
2539 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2540 struct btrfs_root *root, u64 bytenr,
2541 u64 orig_parent, u64 parent,
2542 u64 root_objectid, u64 ref_generation,
2543 u64 owner_objectid);
2544 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *root);
2546 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2547 int btrfs_read_block_groups(struct btrfs_root *root);
2548 struct btrfs_block_group_cache *
2549 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2550 u64 chunk_offset, u64 size);
2551 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2552 struct btrfs_fs_info *fs_info, u64 bytes_used,
2553 u64 type, u64 chunk_offset, u64 size);
2554 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2555 struct btrfs_fs_info *fs_info);
2556 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2557 int alloc, int mark_free);
2558 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root, u64 objectid,
2560 struct btrfs_inode_item *inode,
2561 u64 file_pos, u64 disk_bytenr,
2563 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2564 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2565 void free_excluded_extents(struct btrfs_root *root,
2566 struct btrfs_block_group_cache *cache);
2567 int exclude_super_stripes(struct btrfs_root *root,
2568 struct btrfs_block_group_cache *cache);
2569 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2570 struct btrfs_fs_info *info, u64 start, u64 end);
2571 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2574 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2575 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2576 int level, int slot);
2577 enum btrfs_tree_block_status
2578 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2579 struct extent_buffer *buf);
2580 enum btrfs_tree_block_status
2581 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2582 struct extent_buffer *buf);
2583 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2584 int level, int slot, u64 objectid);
2585 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2586 struct extent_buffer *parent, int slot);
2587 int btrfs_previous_item(struct btrfs_root *root,
2588 struct btrfs_path *path, u64 min_objectid,
2590 int btrfs_previous_extent_item(struct btrfs_root *root,
2591 struct btrfs_path *path, u64 min_objectid);
2592 int btrfs_next_extent_item(struct btrfs_root *root,
2593 struct btrfs_path *path, u64 max_objectid);
2594 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2595 struct btrfs_root *root, struct extent_buffer *buf,
2596 struct extent_buffer *parent, int parent_slot,
2597 struct extent_buffer **cow_ret);
2598 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root,
2600 struct extent_buffer *buf,
2601 struct extent_buffer *parent, int parent_slot,
2602 struct extent_buffer **cow_ret,
2603 u64 search_start, u64 empty_size);
2604 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2605 struct btrfs_root *root,
2606 struct extent_buffer *buf,
2607 struct extent_buffer **cow_ret, u64 new_root_objectid);
2608 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2610 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2611 u32 new_size, int from_end);
2612 int btrfs_split_item(struct btrfs_trans_handle *trans,
2613 struct btrfs_root *root,
2614 struct btrfs_path *path,
2615 struct btrfs_key *new_key,
2616 unsigned long split_offset);
2617 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2618 *root, struct btrfs_key *key, struct btrfs_path *p, int
2620 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2621 u64 iobjectid, u64 ioff, u8 key_type,
2622 struct btrfs_key *found_key);
2623 void btrfs_release_path(struct btrfs_path *p);
2624 void add_root_to_dirty_list(struct btrfs_root *root);
2625 struct btrfs_path *btrfs_alloc_path(void);
2626 void btrfs_free_path(struct btrfs_path *p);
2627 void btrfs_init_path(struct btrfs_path *p);
2628 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2629 struct btrfs_path *path, int slot, int nr);
2631 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root,
2633 struct btrfs_path *path)
2635 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2638 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2639 *root, struct btrfs_key *key, void *data, u32 data_size);
2640 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2641 struct btrfs_root *root,
2642 struct btrfs_path *path,
2643 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2645 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2646 struct btrfs_root *root,
2647 struct btrfs_path *path,
2648 struct btrfs_key *key,
2651 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2654 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2655 static inline int btrfs_next_item(struct btrfs_root *root,
2656 struct btrfs_path *p)
2659 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2660 return btrfs_next_leaf(root, p);
2664 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2665 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2666 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2667 struct btrfs_disk_key *key, int level);
2668 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2669 struct btrfs_key *new_key);
2670 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2671 struct btrfs_path *path,
2672 struct btrfs_key *new_key);
2675 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2676 struct btrfs_root *tree_root,
2677 u64 root_id, u8 type, u64 ref_id,
2678 u64 dirid, u64 sequence,
2679 const char *name, int name_len);
2680 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2681 *root, struct btrfs_key *key, struct btrfs_root_item
2683 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2684 struct btrfs_key *key);
2685 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2686 *root, struct btrfs_key *key, struct btrfs_root_item
2688 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2689 btrfs_root_item *item, struct btrfs_key *key);
2691 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2692 *root, const char *name, int name_len, u64 dir,
2693 struct btrfs_key *location, u8 type, u64 index);
2694 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2695 struct btrfs_root *root,
2696 struct btrfs_path *path, u64 dir,
2697 const char *name, int name_len,
2699 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *root,
2701 struct btrfs_path *path, u64 dir,
2702 const char *name, int name_len,
2703 u64 index, int mod);
2704 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root,
2706 struct btrfs_path *path,
2707 struct btrfs_dir_item *di);
2708 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2709 struct btrfs_root *root, const char *name,
2710 u16 name_len, const void *data, u16 data_len,
2713 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2714 struct btrfs_root *fs_root,
2715 u64 dirid, u64 *objectid);
2718 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2719 struct btrfs_root *root,
2720 const char *name, int name_len,
2721 u64 inode_objectid, u64 ref_objectid, u64 index);
2722 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2723 *root, u64 objectid, struct btrfs_inode_item
2725 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2726 *root, struct btrfs_path *path,
2727 struct btrfs_key *location, int mod);
2728 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2729 *trans, struct btrfs_path *path, struct btrfs_root *root,
2730 u64 ino, u64 parent_ino, u64 index, const char *name,
2731 int namelen, int ins_len);
2732 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2733 struct btrfs_root *root,
2734 const char *name, int name_len,
2735 u64 inode_objectid, u64 ref_objectid,
2737 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root,
2739 const char *name, int name_len,
2740 u64 inode_objectid, u64 ref_objectid, u64 index);
2741 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, struct btrfs_path *path,
2743 const char *name, int namelen, u64 ino, u64 parent_ino,
2745 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2746 struct btrfs_root *root, const char *name, int name_len,
2747 u64 ino, u64 parent_ino, u64 *index);
2750 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2751 struct btrfs_root *root, u64 bytenr, u64 len);
2752 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2753 struct btrfs_root *root,
2754 u64 objectid, u64 pos, u64 offset,
2757 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2758 struct btrfs_root *root, u64 objectid,
2759 u64 offset, const char *buffer, size_t size);
2760 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2761 struct btrfs_root *root, u64 alloc_end,
2762 u64 bytenr, char *data, size_t len);
2763 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2764 struct btrfs_root *root, struct btrfs_path *path,
2768 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2769 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2772 static inline int is_fstree(u64 rootid)
2774 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2775 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2781 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2782 u64 dir, u64 index);
2783 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2785 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2786 struct btrfs_root *root, u64 ino, u64 flags);
2787 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2788 u64 ino, u64 parent_ino, char *name, int namelen,
2789 u8 type, u64 *index, int add_backref, int ignore_existed);
2790 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2791 u64 ino, u64 parent_ino, u64 index, const char *name,
2792 int namelen, int add_orphan);
2793 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root, struct btrfs_path *path,
2796 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2797 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2798 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2799 u64 root_objectid, bool convert);
2802 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 struct btrfs_path *path,
2805 u64 ino, u64 offset, u64 len, int ins_len);
2806 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2807 struct btrfs_root *root,
2808 u64 ino, u64 offset, u64 len);
2809 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,