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 static int btrfs_csum_sizes[] = { 4 };
172 /* four bytes for CRC32 */
173 #define BTRFS_CRC32_SIZE 4
174 #define BTRFS_EMPTY_DIR_SIZE 0
176 #define BTRFS_FT_UNKNOWN 0
177 #define BTRFS_FT_REG_FILE 1
178 #define BTRFS_FT_DIR 2
179 #define BTRFS_FT_CHRDEV 3
180 #define BTRFS_FT_BLKDEV 4
181 #define BTRFS_FT_FIFO 5
182 #define BTRFS_FT_SOCK 6
183 #define BTRFS_FT_SYMLINK 7
184 #define BTRFS_FT_XATTR 8
185 #define BTRFS_FT_MAX 9
187 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
190 * the key defines the order in the tree, and so it also defines (optimal)
191 * block layout. objectid corresponds to the inode number. The flags
192 * tells us things about the object, and is a kind of stream selector.
193 * so for a given inode, keys with flags of 1 might refer to the inode
194 * data, flags of 2 may point to file data in the btree and flags == 3
195 * may point to extents.
197 * offset is the starting byte offset for this key in the stream.
199 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
200 * in cpu native order. Otherwise they are identical and their sizes
201 * should be the same (ie both packed)
203 struct btrfs_disk_key {
207 } __attribute__ ((__packed__));
213 } __attribute__ ((__packed__));
215 struct btrfs_mapping_tree {
216 struct cache_tree cache_tree;
219 #define BTRFS_UUID_SIZE 16
220 struct btrfs_dev_item {
221 /* the internal btrfs device id */
224 /* size of the device */
230 /* optimal io alignment for this device */
233 /* optimal io width for this device */
236 /* minimal io size for this device */
239 /* type and info about this device */
242 /* expected generation for this device */
246 * starting byte of this partition on the device,
247 * to allow for stripe alignment in the future
251 /* grouping information for allocation decisions */
254 /* seek speed 0-100 where 100 is fastest */
257 /* bandwidth 0-100 where 100 is fastest */
260 /* btrfs generated uuid for this device */
261 u8 uuid[BTRFS_UUID_SIZE];
263 /* uuid of FS who owns this device */
264 u8 fsid[BTRFS_UUID_SIZE];
265 } __attribute__ ((__packed__));
267 struct btrfs_stripe {
270 u8 dev_uuid[BTRFS_UUID_SIZE];
271 } __attribute__ ((__packed__));
274 /* size of this chunk in bytes */
277 /* objectid of the root referencing this chunk */
283 /* optimal io alignment for this chunk */
286 /* optimal io width for this chunk */
289 /* minimal io size for this chunk */
292 /* 2^16 stripes is quite a lot, a second limit is the size of a single
297 /* sub stripes only matter for raid10 */
299 struct btrfs_stripe stripe;
300 /* additional stripes go here */
301 } __attribute__ ((__packed__));
303 #define BTRFS_FREE_SPACE_EXTENT 1
304 #define BTRFS_FREE_SPACE_BITMAP 2
306 struct btrfs_free_space_entry {
310 } __attribute__ ((__packed__));
312 struct btrfs_free_space_header {
313 struct btrfs_disk_key location;
317 } __attribute__ ((__packed__));
319 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
321 BUG_ON(num_stripes == 0);
322 return sizeof(struct btrfs_chunk) +
323 sizeof(struct btrfs_stripe) * (num_stripes - 1);
326 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
327 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
328 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
329 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
330 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
331 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
333 #define BTRFS_BACKREF_REV_MAX 256
334 #define BTRFS_BACKREF_REV_SHIFT 56
335 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
336 BTRFS_BACKREF_REV_SHIFT)
338 #define BTRFS_OLD_BACKREF_REV 0
339 #define BTRFS_MIXED_BACKREF_REV 1
342 * every tree block (leaf or node) starts with this header.
344 struct btrfs_header {
345 /* these first four must match the super block */
346 u8 csum[BTRFS_CSUM_SIZE];
347 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
348 __le64 bytenr; /* which block this node is supposed to live in */
351 /* allowed to be different from the super from here on down */
352 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
357 } __attribute__ ((__packed__));
359 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
360 #define BTRFS_LEAF_DATA_SIZE(fs_info) \
361 (__BTRFS_LEAF_DATA_SIZE(fs_info->nodesize))
362 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
363 sizeof(struct btrfs_item) - \
364 sizeof(struct btrfs_file_extent_item))
365 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
366 sizeof(struct btrfs_item) -\
367 sizeof(struct btrfs_dir_item))
371 * this is a very generous portion of the super block, giving us
372 * room to translate 14 chunks with 3 stripes each.
374 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
375 #define BTRFS_LABEL_SIZE 256
378 * just in case we somehow lose the roots and are not able to mount,
379 * we store an array of the roots from previous transactions
382 #define BTRFS_NUM_BACKUP_ROOTS 4
383 struct btrfs_root_backup {
385 __le64 tree_root_gen;
388 __le64 chunk_root_gen;
391 __le64 extent_root_gen;
400 __le64 csum_root_gen;
410 u8 extent_root_level;
414 /* future and to align */
416 } __attribute__ ((__packed__));
419 * the super block basically lists the main trees of the FS
420 * it currently lacks any block count etc etc
422 struct btrfs_super_block {
423 u8 csum[BTRFS_CSUM_SIZE];
424 /* the first 3 fields must match struct btrfs_header */
425 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
426 __le64 bytenr; /* this block number */
429 /* allowed to be different from the btrfs_header from here own down */
436 /* this will help find the new super based on the log root */
437 __le64 log_root_transid;
440 __le64 root_dir_objectid;
444 /* Unused and must be equal to nodesize */
445 __le32 __unused_leafsize;
447 __le32 sys_chunk_array_size;
448 __le64 chunk_root_generation;
450 __le64 compat_ro_flags;
451 __le64 incompat_flags;
456 struct btrfs_dev_item dev_item;
458 char label[BTRFS_LABEL_SIZE];
460 __le64 cache_generation;
461 __le64 uuid_tree_generation;
463 /* future expansion */
465 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
466 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
467 } __attribute__ ((__packed__));
470 * Compat flags that we support. If any incompat flags are set other than the
471 * ones specified below then we will fail to mount
473 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
475 * Older kernels on big-endian systems produced broken free space tree bitmaps,
476 * and btrfs-progs also used to corrupt the free space tree. If this bit is
477 * clear, then the free space tree cannot be trusted. btrfs-progs can also
478 * intentionally clear this bit to ask the kernel to rebuild the free space
481 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
483 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
484 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
485 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
486 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
487 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
490 * older kernels tried to do bigger metadata blocks, but the
491 * code was pretty buggy. Lets not let them try anymore.
493 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
494 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
495 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
496 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
497 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
499 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
502 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
503 * added here until read-write support for the free space tree is implemented in
506 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
508 #define BTRFS_FEATURE_INCOMPAT_SUPP \
509 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
510 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
511 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
512 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
513 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
514 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
515 BTRFS_FEATURE_INCOMPAT_RAID56 | \
516 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
517 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
518 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
521 * A leaf is full of items. offset and size tell us where to find
522 * the item in the leaf (relative to the start of the data area)
525 struct btrfs_disk_key key;
528 } __attribute__ ((__packed__));
531 * leaves have an item area and a data area:
532 * [item0, item1....itemN] [free space] [dataN...data1, data0]
534 * The data is separate from the items to get the keys closer together
538 struct btrfs_header header;
539 struct btrfs_item items[];
540 } __attribute__ ((__packed__));
543 * all non-leaf blocks are nodes, they hold only keys and pointers to
546 struct btrfs_key_ptr {
547 struct btrfs_disk_key key;
550 } __attribute__ ((__packed__));
553 struct btrfs_header header;
554 struct btrfs_key_ptr ptrs[];
555 } __attribute__ ((__packed__));
558 * btrfs_paths remember the path taken from the root down to the leaf.
559 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
560 * to any other levels that are present.
562 * The slots array records the index of the item or block pointer
563 * used while walking the tree.
567 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
568 int slots[BTRFS_MAX_LEVEL];
570 /* The kernel locking sheme is not done in userspace. */
571 int locks[BTRFS_MAX_LEVEL];
574 /* keep some upper locks as we walk down */
578 * set by btrfs_split_item, tells search_slot to keep all locks
579 * and to force calls to keep space in the nodes
586 * items in the extent btree are used to record the objectid of the
587 * owner of the block and the number of references
590 struct btrfs_extent_item {
594 } __attribute__ ((__packed__));
596 struct btrfs_extent_item_v0 {
598 } __attribute__ ((__packed__));
600 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
601 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
602 sizeof(struct btrfs_item))
603 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
605 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
606 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
608 /* following flags only apply to tree blocks */
610 /* use full backrefs for extent pointers in the block*/
611 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
613 struct btrfs_tree_block_info {
614 struct btrfs_disk_key key;
616 } __attribute__ ((__packed__));
618 struct btrfs_extent_data_ref {
623 } __attribute__ ((__packed__));
625 struct btrfs_shared_data_ref {
627 } __attribute__ ((__packed__));
629 struct btrfs_extent_inline_ref {
632 } __attribute__ ((__packed__));
634 struct btrfs_extent_ref_v0 {
639 } __attribute__ ((__packed__));
641 /* dev extents record free space on individual devices. The owner
642 * field points back to the chunk allocation mapping tree that allocated
643 * the extent. The chunk tree uuid field is a way to double check the owner
645 struct btrfs_dev_extent {
647 __le64 chunk_objectid;
650 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
651 } __attribute__ ((__packed__));
653 struct btrfs_inode_ref {
657 } __attribute__ ((__packed__));
659 struct btrfs_inode_extref {
660 __le64 parent_objectid;
663 __u8 name[0]; /* name goes here */
664 } __attribute__ ((__packed__));
666 struct btrfs_timespec {
669 } __attribute__ ((__packed__));
672 BTRFS_COMPRESS_NONE = 0,
673 BTRFS_COMPRESS_ZLIB = 1,
674 BTRFS_COMPRESS_LZO = 2,
675 BTRFS_COMPRESS_ZSTD = 3,
676 BTRFS_COMPRESS_TYPES = 3,
677 BTRFS_COMPRESS_LAST = 4,
678 } btrfs_compression_type;
680 /* we don't understand any encryption methods right now */
682 BTRFS_ENCRYPTION_NONE = 0,
683 BTRFS_ENCRYPTION_LAST = 1,
684 } btrfs_encryption_type;
686 enum btrfs_tree_block_status {
687 BTRFS_TREE_BLOCK_CLEAN,
688 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
689 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
690 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
691 BTRFS_TREE_BLOCK_INVALID_LEVEL,
692 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
693 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
696 struct btrfs_inode_item {
697 /* nfs style generation number */
699 /* transid that last touched this inode */
711 /* modification sequence number for NFS */
715 * a little future expansion, for more than this we can
716 * just grow the inode item and version it
719 struct btrfs_timespec atime;
720 struct btrfs_timespec ctime;
721 struct btrfs_timespec mtime;
722 struct btrfs_timespec otime;
723 } __attribute__ ((__packed__));
725 struct btrfs_dir_log_item {
727 } __attribute__ ((__packed__));
729 struct btrfs_dir_item {
730 struct btrfs_disk_key location;
735 } __attribute__ ((__packed__));
737 struct btrfs_root_item_v0 {
738 struct btrfs_inode_item inode;
744 __le64 last_snapshot;
747 struct btrfs_disk_key drop_progress;
750 } __attribute__ ((__packed__));
752 struct btrfs_root_item {
753 struct btrfs_inode_item inode;
759 __le64 last_snapshot;
762 struct btrfs_disk_key drop_progress;
767 * The following fields appear after subvol_uuids+subvol_times
772 * This generation number is used to test if the new fields are valid
773 * and up to date while reading the root item. Every time the root item
774 * is written out, the "generation" field is copied into this field. If
775 * anyone ever mounted the fs with an older kernel, we will have
776 * mismatching generation values here and thus must invalidate the
777 * new fields. See btrfs_update_root and btrfs_find_last_root for
779 * the offset of generation_v2 is also used as the start for the memset
780 * when invalidating the fields.
782 __le64 generation_v2;
783 u8 uuid[BTRFS_UUID_SIZE];
784 u8 parent_uuid[BTRFS_UUID_SIZE];
785 u8 received_uuid[BTRFS_UUID_SIZE];
786 __le64 ctransid; /* updated when an inode changes */
787 __le64 otransid; /* trans when created */
788 __le64 stransid; /* trans when sent. non-zero for received subvol */
789 __le64 rtransid; /* trans when received. non-zero for received subvol */
790 struct btrfs_timespec ctime;
791 struct btrfs_timespec otime;
792 struct btrfs_timespec stime;
793 struct btrfs_timespec rtime;
794 __le64 reserved[8]; /* for future */
795 } __attribute__ ((__packed__));
798 * this is used for both forward and backward root refs
800 struct btrfs_root_ref {
804 } __attribute__ ((__packed__));
806 struct btrfs_disk_balance_args {
808 * profiles to operate on, single is denoted by
809 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
815 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
816 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
829 /* devid subset filter [pstart..pend) */
833 /* btrfs virtual address space subset filter [vstart..vend) */
838 * profile to convert to, single is denoted by
839 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
843 /* BTRFS_BALANCE_ARGS_* */
847 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
848 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
860 * Process chunks that cross stripes_min..stripes_max devices,
861 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
867 } __attribute__ ((__packed__));
870 * store balance parameters to disk so that balance can be properly
871 * resumed after crash or unmount
873 struct btrfs_balance_item {
874 /* BTRFS_BALANCE_* */
877 struct btrfs_disk_balance_args data;
878 struct btrfs_disk_balance_args meta;
879 struct btrfs_disk_balance_args sys;
882 } __attribute__ ((__packed__));
884 #define BTRFS_FILE_EXTENT_INLINE 0
885 #define BTRFS_FILE_EXTENT_REG 1
886 #define BTRFS_FILE_EXTENT_PREALLOC 2
888 struct btrfs_file_extent_item {
890 * transaction id that created this extent
894 * max number of bytes to hold this extent in ram
895 * when we split a compressed extent we can't know how big
896 * each of the resulting pieces will be. So, this is
897 * an upper limit on the size of the extent in ram instead of
903 * 32 bits for the various ways we might encode the data,
904 * including compression and encryption. If any of these
905 * are set to something a given disk format doesn't understand
906 * it is treated like an incompat flag for reading and writing,
911 __le16 other_encoding; /* spare for later use */
913 /* are we inline data or a real extent? */
917 * disk space consumed by the extent, checksum blocks are included
921 __le64 disk_num_bytes;
923 * the logical offset in file blocks (no csums)
924 * this extent record is for. This allows a file extent to point
925 * into the middle of an existing extent on disk, sharing it
926 * between two snapshots (useful if some bytes in the middle of the
927 * extent have changed
931 * the logical number of file blocks (no csums included)
935 } __attribute__ ((__packed__));
937 struct btrfs_dev_stats_item {
939 * grow this item struct at the end for future enhancements and keep
940 * the existing values unchanged
942 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
943 } __attribute__ ((__packed__));
945 struct btrfs_csum_item {
947 } __attribute__ ((__packed__));
950 * We don't want to overwrite 1M at the beginning of device, even though
951 * there is our 1st superblock at 64k. Some possible reasons:
952 * - the first 64k blank is useful for some boot loader/manager
953 * - the first 1M could be scratched by buggy partitioner or somesuch
955 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
957 /* tag for the radix tree of block groups in ram */
958 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
959 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
960 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
961 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
962 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
963 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
964 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
965 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
966 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
967 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
968 #define BTRFS_NR_RAID_TYPES 7
970 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
971 BTRFS_BLOCK_GROUP_SYSTEM | \
972 BTRFS_BLOCK_GROUP_METADATA)
974 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
975 BTRFS_BLOCK_GROUP_RAID1 | \
976 BTRFS_BLOCK_GROUP_RAID5 | \
977 BTRFS_BLOCK_GROUP_RAID6 | \
978 BTRFS_BLOCK_GROUP_DUP | \
979 BTRFS_BLOCK_GROUP_RAID10)
981 /* used in struct btrfs_balance_args fields */
982 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
985 * GLOBAL_RSV does not exist as a on-disk block group type and is used
986 * internally for exporting info about global block reserve from space infos
988 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
990 #define BTRFS_QGROUP_LEVEL_SHIFT 48
992 static inline u64 btrfs_qgroup_level(u64 qgroupid)
994 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
997 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
999 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
1002 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1003 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1004 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1006 struct btrfs_qgroup_status_item {
1010 __le64 rescan; /* progress during scanning */
1011 } __attribute__ ((__packed__));
1013 struct btrfs_block_group_item {
1015 __le64 chunk_objectid;
1017 } __attribute__ ((__packed__));
1019 struct btrfs_free_space_info {
1020 __le32 extent_count;
1022 } __attribute__ ((__packed__));
1024 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1026 struct btrfs_qgroup_info_item {
1029 __le64 referenced_compressed;
1031 __le64 exclusive_compressed;
1032 } __attribute__ ((__packed__));
1034 /* flags definition for qgroup limits */
1035 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1036 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1037 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1038 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1039 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1040 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1042 struct btrfs_qgroup_limit_item {
1044 __le64 max_referenced;
1045 __le64 max_exclusive;
1046 __le64 rsv_referenced;
1047 __le64 rsv_exclusive;
1048 } __attribute__ ((__packed__));
1050 struct btrfs_space_info {
1056 struct list_head list;
1059 struct btrfs_block_group_cache {
1060 struct cache_extent cache;
1061 struct btrfs_key key;
1062 struct btrfs_block_group_item item;
1063 struct btrfs_space_info *space_info;
1064 struct btrfs_free_space_ctl *free_space_ctl;
1072 struct btrfs_device;
1073 struct btrfs_fs_devices;
1074 struct btrfs_fs_info {
1075 u8 fsid[BTRFS_FSID_SIZE];
1077 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1078 u8 *new_chunk_tree_uuid;
1079 struct btrfs_root *fs_root;
1080 struct btrfs_root *extent_root;
1081 struct btrfs_root *tree_root;
1082 struct btrfs_root *chunk_root;
1083 struct btrfs_root *dev_root;
1084 struct btrfs_root *csum_root;
1085 struct btrfs_root *quota_root;
1086 struct btrfs_root *free_space_root;
1088 struct rb_root fs_root_tree;
1090 /* the log root tree is a directory of all the other log roots */
1091 struct btrfs_root *log_root_tree;
1093 struct extent_io_tree extent_cache;
1094 struct extent_io_tree free_space_cache;
1095 struct extent_io_tree block_group_cache;
1096 struct extent_io_tree pinned_extents;
1097 struct extent_io_tree pending_del;
1098 struct extent_io_tree extent_ins;
1099 struct extent_io_tree *excluded_extents;
1101 /* logical->physical extent mapping */
1102 struct btrfs_mapping_tree mapping_tree;
1105 u64 last_trans_committed;
1107 u64 avail_data_alloc_bits;
1108 u64 avail_metadata_alloc_bits;
1109 u64 avail_system_alloc_bits;
1110 u64 data_alloc_profile;
1111 u64 metadata_alloc_profile;
1112 u64 system_alloc_profile;
1115 struct btrfs_trans_handle *running_transaction;
1116 struct btrfs_super_block *super_copy;
1117 struct mutex fs_mutex;
1122 struct list_head dirty_cowonly_roots;
1123 struct list_head recow_ebs;
1125 struct btrfs_fs_devices *fs_devices;
1126 struct list_head space_info;
1128 unsigned int system_allocs:1;
1129 unsigned int readonly:1;
1130 unsigned int on_restoring:1;
1131 unsigned int is_chunk_recover:1;
1132 unsigned int quota_enabled:1;
1133 unsigned int suppress_check_block_errors:1;
1134 unsigned int ignore_fsid_mismatch:1;
1135 unsigned int ignore_chunk_tree_error:1;
1136 unsigned int avoid_meta_chunk_alloc:1;
1137 unsigned int avoid_sys_chunk_alloc:1;
1138 unsigned int finalize_on_close:1;
1140 int transaction_aborted;
1142 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1143 struct btrfs_root *root,
1144 u64 bytenr, u64 num_bytes, u64 parent,
1145 u64 root_objectid, u64 owner, u64 offset,
1147 struct cache_tree *fsck_extent_cache;
1148 struct cache_tree *corrupt_blocks;
1150 /* Cached block sizes */
1157 * in ram representation of the tree. extent_root is used for all allocations
1158 * and for the extent tree extent_root root.
1161 struct extent_buffer *node;
1162 struct extent_buffer *commit_root;
1163 struct btrfs_root_item root_item;
1164 struct btrfs_key root_key;
1165 struct btrfs_fs_info *fs_info;
1174 u64 last_inode_alloc;
1177 * Record orphan data extent ref
1179 * TODO: Don't restore things in btrfs_root.
1180 * Directly record it into inode_record, which needs a lot of
1181 * infrastructure change to allow cooperation between extent
1184 struct list_head orphan_data_extents;
1186 /* the dirty list is only used by non-reference counted roots */
1187 struct list_head dirty_list;
1188 struct rb_node rb_node;
1191 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1193 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1197 * inode items have the data typically returned from stat and store other
1198 * info about object characteristics. There is one for every file and dir in
1201 #define BTRFS_INODE_ITEM_KEY 1
1202 #define BTRFS_INODE_REF_KEY 12
1203 #define BTRFS_INODE_EXTREF_KEY 13
1204 #define BTRFS_XATTR_ITEM_KEY 24
1205 #define BTRFS_ORPHAN_ITEM_KEY 48
1207 #define BTRFS_DIR_LOG_ITEM_KEY 60
1208 #define BTRFS_DIR_LOG_INDEX_KEY 72
1210 * dir items are the name -> inode pointers in a directory. There is one
1211 * for every name in a directory.
1213 #define BTRFS_DIR_ITEM_KEY 84
1214 #define BTRFS_DIR_INDEX_KEY 96
1217 * extent data is for file data
1219 #define BTRFS_EXTENT_DATA_KEY 108
1222 * csum items have the checksums for data in the extents
1224 #define BTRFS_CSUM_ITEM_KEY 120
1226 * extent csums are stored in a separate tree and hold csums for
1227 * an entire extent on disk.
1229 #define BTRFS_EXTENT_CSUM_KEY 128
1232 * root items point to tree roots. There are typically in the root
1233 * tree used by the super block to find all the other trees
1235 #define BTRFS_ROOT_ITEM_KEY 132
1238 * root backrefs tie subvols and snapshots to the directory entries that
1241 #define BTRFS_ROOT_BACKREF_KEY 144
1244 * root refs make a fast index for listing all of the snapshots and
1245 * subvolumes referenced by a given root. They point directly to the
1246 * directory item in the root that references the subvol
1248 #define BTRFS_ROOT_REF_KEY 156
1251 * extent items are in the extent map tree. These record which blocks
1252 * are used, and how many references there are to each block
1254 #define BTRFS_EXTENT_ITEM_KEY 168
1257 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1258 * the length, so we save the level in key->offset instead of the length.
1260 #define BTRFS_METADATA_ITEM_KEY 169
1262 #define BTRFS_TREE_BLOCK_REF_KEY 176
1264 #define BTRFS_EXTENT_DATA_REF_KEY 178
1266 /* old style extent backrefs */
1267 #define BTRFS_EXTENT_REF_V0_KEY 180
1269 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1271 #define BTRFS_SHARED_DATA_REF_KEY 184
1275 * block groups give us hints into the extent allocation trees. Which
1276 * blocks are free etc etc
1278 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1281 * Every block group is represented in the free space tree by a free space info
1282 * item, which stores some accounting information. It is keyed on
1283 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1285 #define BTRFS_FREE_SPACE_INFO_KEY 198
1288 * A free space extent tracks an extent of space that is free in a block group.
1289 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1291 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1294 * When a block group becomes very fragmented, we convert it to use bitmaps
1295 * instead of extents. A free space bitmap is keyed on
1296 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1297 * (length / sectorsize) bits.
1299 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1301 #define BTRFS_DEV_EXTENT_KEY 204
1302 #define BTRFS_DEV_ITEM_KEY 216
1303 #define BTRFS_CHUNK_ITEM_KEY 228
1305 #define BTRFS_BALANCE_ITEM_KEY 248
1310 #define BTRFS_QGROUP_STATUS_KEY 240
1311 #define BTRFS_QGROUP_INFO_KEY 242
1312 #define BTRFS_QGROUP_LIMIT_KEY 244
1313 #define BTRFS_QGROUP_RELATION_KEY 246
1316 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1318 #define BTRFS_BALANCE_ITEM_KEY 248
1321 * The key type for tree items that are stored persistently, but do not need to
1322 * exist for extended period of time. The items can exist in any tree.
1324 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1328 * - balance status item
1329 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1331 #define BTRFS_TEMPORARY_ITEM_KEY 248
1334 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1336 #define BTRFS_DEV_STATS_KEY 249
1339 * The key type for tree items that are stored persistently and usually exist
1340 * for a long period, eg. filesystem lifetime. The item kinds can be status
1341 * information, stats or preference values. The item can exist in any tree.
1343 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1347 * - device statistics, store IO stats in the device tree, one key for all
1349 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1351 #define BTRFS_PERSISTENT_ITEM_KEY 249
1354 * Persistently stores the device replace state in the device tree.
1355 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1357 #define BTRFS_DEV_REPLACE_KEY 250
1360 * Stores items that allow to quickly map UUIDs to something else.
1361 * These items are part of the filesystem UUID tree.
1362 * The key is built like this:
1363 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1365 #if BTRFS_UUID_SIZE != 16
1366 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1368 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1369 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1370 * received subvols */
1373 * string items are for debugging. They just store a short string of
1376 #define BTRFS_STRING_ITEM_KEY 253
1380 #define BTRFS_INODE_NODATASUM (1 << 0)
1381 #define BTRFS_INODE_NODATACOW (1 << 1)
1382 #define BTRFS_INODE_READONLY (1 << 2)
1383 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1384 #define BTRFS_INODE_PREALLOC (1 << 4)
1385 #define BTRFS_INODE_SYNC (1 << 5)
1386 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1387 #define BTRFS_INODE_APPEND (1 << 7)
1388 #define BTRFS_INODE_NODUMP (1 << 8)
1389 #define BTRFS_INODE_NOATIME (1 << 9)
1390 #define BTRFS_INODE_DIRSYNC (1 << 10)
1391 #define BTRFS_INODE_COMPRESS (1 << 11)
1393 #define read_eb_member(eb, ptr, type, member, result) ( \
1394 read_extent_buffer(eb, (char *)(result), \
1395 ((unsigned long)(ptr)) + \
1396 offsetof(type, member), \
1397 sizeof(((type *)0)->member)))
1399 #define write_eb_member(eb, ptr, type, member, result) ( \
1400 write_extent_buffer(eb, (char *)(result), \
1401 ((unsigned long)(ptr)) + \
1402 offsetof(type, member), \
1403 sizeof(((type *)0)->member)))
1405 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1406 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1408 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1409 return le##bits##_to_cpu(h->member); \
1411 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1414 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1415 h->member = cpu_to_le##bits(val); \
1418 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1419 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1422 unsigned long offset = (unsigned long)s; \
1423 const type *p = (type *) (eb->data + offset); \
1424 return get_unaligned_le##bits(&p->member); \
1426 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1427 type *s, u##bits val) \
1429 unsigned long offset = (unsigned long)s; \
1430 type *p = (type *) (eb->data + offset); \
1431 put_unaligned_le##bits(val, &p->member); \
1434 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1435 static inline u##bits btrfs_##name(const type *s) \
1437 return le##bits##_to_cpu(s->member); \
1439 static inline void btrfs_set_##name(type *s, u##bits val) \
1441 s->member = cpu_to_le##bits(val); \
1444 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1445 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1446 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1447 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1448 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1449 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1451 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1452 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1453 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1454 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1455 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1456 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1458 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1459 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1461 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1463 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1465 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1467 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1479 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1481 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1484 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1486 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1489 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1490 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1491 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1492 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1493 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1494 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1495 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1496 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1497 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1498 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1499 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1501 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1503 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1506 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1507 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1508 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1510 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1512 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1514 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1521 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1522 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1524 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1527 unsigned long offset = (unsigned long)c;
1528 offset += offsetof(struct btrfs_chunk, stripe);
1529 offset += nr * sizeof(struct btrfs_stripe);
1530 return (struct btrfs_stripe *)offset;
1533 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1535 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1538 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1539 struct btrfs_chunk *c, int nr)
1541 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1544 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1545 struct btrfs_chunk *c, int nr,
1548 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1551 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1552 struct btrfs_chunk *c, int nr)
1554 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1557 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1558 struct btrfs_chunk *c, int nr,
1561 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1564 /* struct btrfs_block_group_item */
1565 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1567 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1569 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1570 struct btrfs_block_group_item, chunk_objectid, 64);
1572 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1573 struct btrfs_block_group_item, chunk_objectid, 64);
1574 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1575 struct btrfs_block_group_item, flags, 64);
1576 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1577 struct btrfs_block_group_item, flags, 64);
1579 /* struct btrfs_free_space_info */
1580 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1582 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1584 /* struct btrfs_inode_ref */
1585 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1586 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1587 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1589 /* struct btrfs_inode_extref */
1590 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1591 parent_objectid, 64);
1592 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1594 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1596 /* struct btrfs_inode_item */
1597 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1598 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1599 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1600 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1601 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1602 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1603 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1604 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1605 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1606 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1607 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1608 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1610 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1611 struct btrfs_inode_item, generation, 64);
1612 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1613 struct btrfs_inode_item, sequence, 64);
1614 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1615 struct btrfs_inode_item, transid, 64);
1616 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1617 struct btrfs_inode_item, size, 64);
1618 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1619 struct btrfs_inode_item, nbytes, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1621 struct btrfs_inode_item, block_group, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1623 struct btrfs_inode_item, nlink, 32);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1625 struct btrfs_inode_item, uid, 32);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1627 struct btrfs_inode_item, gid, 32);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1629 struct btrfs_inode_item, mode, 32);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1631 struct btrfs_inode_item, rdev, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1633 struct btrfs_inode_item, flags, 64);
1635 static inline struct btrfs_timespec *
1636 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1638 unsigned long ptr = (unsigned long)inode_item;
1639 ptr += offsetof(struct btrfs_inode_item, atime);
1640 return (struct btrfs_timespec *)ptr;
1643 static inline struct btrfs_timespec *
1644 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1646 unsigned long ptr = (unsigned long)inode_item;
1647 ptr += offsetof(struct btrfs_inode_item, mtime);
1648 return (struct btrfs_timespec *)ptr;
1651 static inline struct btrfs_timespec *
1652 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1654 unsigned long ptr = (unsigned long)inode_item;
1655 ptr += offsetof(struct btrfs_inode_item, ctime);
1656 return (struct btrfs_timespec *)ptr;
1659 static inline struct btrfs_timespec *
1660 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1662 unsigned long ptr = (unsigned long)inode_item;
1663 ptr += offsetof(struct btrfs_inode_item, otime);
1664 return (struct btrfs_timespec *)ptr;
1667 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1668 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1669 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1671 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1674 /* struct btrfs_dev_extent */
1675 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1677 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1678 chunk_objectid, 64);
1679 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1681 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1683 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1686 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1688 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1689 return (u8 *)((unsigned long)dev + ptr);
1693 /* struct btrfs_extent_item */
1694 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1696 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1698 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1699 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1701 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1703 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1705 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1706 struct btrfs_tree_block_info *item,
1707 struct btrfs_disk_key *key)
1709 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1712 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1713 struct btrfs_tree_block_info *item,
1714 struct btrfs_disk_key *key)
1716 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1719 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1721 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1723 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1725 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1728 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1731 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1733 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1735 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1736 struct btrfs_extent_inline_ref, type, 8);
1737 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1738 struct btrfs_extent_inline_ref, offset, 64);
1740 static inline u32 btrfs_extent_inline_ref_size(int type)
1742 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1743 type == BTRFS_SHARED_BLOCK_REF_KEY)
1744 return sizeof(struct btrfs_extent_inline_ref);
1745 if (type == BTRFS_SHARED_DATA_REF_KEY)
1746 return sizeof(struct btrfs_shared_data_ref) +
1747 sizeof(struct btrfs_extent_inline_ref);
1748 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1749 return sizeof(struct btrfs_extent_data_ref) +
1750 offsetof(struct btrfs_extent_inline_ref, offset);
1755 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1756 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1758 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1759 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1761 /* struct btrfs_node */
1762 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1763 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1765 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1768 ptr = offsetof(struct btrfs_node, ptrs) +
1769 sizeof(struct btrfs_key_ptr) * nr;
1770 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1773 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1777 ptr = offsetof(struct btrfs_node, ptrs) +
1778 sizeof(struct btrfs_key_ptr) * nr;
1779 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1782 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1785 ptr = offsetof(struct btrfs_node, ptrs) +
1786 sizeof(struct btrfs_key_ptr) * nr;
1787 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1790 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1794 ptr = offsetof(struct btrfs_node, ptrs) +
1795 sizeof(struct btrfs_key_ptr) * nr;
1796 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1799 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1801 return offsetof(struct btrfs_node, ptrs) +
1802 sizeof(struct btrfs_key_ptr) * nr;
1805 static inline void btrfs_node_key(struct extent_buffer *eb,
1806 struct btrfs_disk_key *disk_key, int nr)
1809 ptr = btrfs_node_key_ptr_offset(nr);
1810 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1811 struct btrfs_key_ptr, key, disk_key);
1814 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1815 struct btrfs_disk_key *disk_key, int nr)
1818 ptr = btrfs_node_key_ptr_offset(nr);
1819 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1820 struct btrfs_key_ptr, key, disk_key);
1823 /* struct btrfs_item */
1824 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1825 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1827 static inline unsigned long btrfs_item_nr_offset(int nr)
1829 return offsetof(struct btrfs_leaf, items) +
1830 sizeof(struct btrfs_item) * nr;
1833 static inline struct btrfs_item *btrfs_item_nr(int nr)
1835 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1838 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1839 struct btrfs_item *item)
1841 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1844 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1846 return btrfs_item_end(eb, btrfs_item_nr(nr));
1849 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1851 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1854 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1856 return btrfs_item_size(eb, btrfs_item_nr(nr));
1859 static inline void btrfs_item_key(struct extent_buffer *eb,
1860 struct btrfs_disk_key *disk_key, int nr)
1862 struct btrfs_item *item = btrfs_item_nr(nr);
1863 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1866 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1867 struct btrfs_disk_key *disk_key, int nr)
1869 struct btrfs_item *item = btrfs_item_nr(nr);
1870 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1873 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1876 * struct btrfs_root_ref
1878 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1879 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1880 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1882 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1883 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1884 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1886 /* struct btrfs_dir_item */
1887 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1888 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1889 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1890 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1892 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1893 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1894 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1895 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1897 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1898 struct btrfs_dir_item *item,
1899 struct btrfs_disk_key *key)
1901 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1904 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1905 struct btrfs_dir_item *item,
1906 struct btrfs_disk_key *key)
1908 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1911 /* struct btrfs_free_space_header */
1912 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1914 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1916 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1919 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1920 struct btrfs_free_space_header *h,
1921 struct btrfs_disk_key *key)
1923 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1926 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1927 struct btrfs_free_space_header *h,
1928 struct btrfs_disk_key *key)
1930 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1933 /* struct btrfs_disk_key */
1934 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1936 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1937 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1939 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1940 struct btrfs_disk_key *disk)
1942 cpu->offset = le64_to_cpu(disk->offset);
1943 cpu->type = disk->type;
1944 cpu->objectid = le64_to_cpu(disk->objectid);
1947 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1948 struct btrfs_key *cpu)
1950 disk->offset = cpu_to_le64(cpu->offset);
1951 disk->type = cpu->type;
1952 disk->objectid = cpu_to_le64(cpu->objectid);
1955 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1956 struct btrfs_key *key, int nr)
1958 struct btrfs_disk_key disk_key;
1959 btrfs_node_key(eb, &disk_key, nr);
1960 btrfs_disk_key_to_cpu(key, &disk_key);
1963 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1964 struct btrfs_key *key, int nr)
1966 struct btrfs_disk_key disk_key;
1967 btrfs_item_key(eb, &disk_key, nr);
1968 btrfs_disk_key_to_cpu(key, &disk_key);
1971 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1972 struct btrfs_dir_item *item,
1973 struct btrfs_key *key)
1975 struct btrfs_disk_key disk_key;
1976 btrfs_dir_item_key(eb, item, &disk_key);
1977 btrfs_disk_key_to_cpu(key, &disk_key);
1980 /* struct btrfs_header */
1981 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1982 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1984 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1985 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1986 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1987 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1988 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1989 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1991 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1992 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1995 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1997 return (btrfs_header_flags(eb) & flag) == flag;
2000 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2002 u64 flags = btrfs_header_flags(eb);
2003 btrfs_set_header_flags(eb, flags | flag);
2004 return (flags & flag) == flag;
2007 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2009 u64 flags = btrfs_header_flags(eb);
2010 btrfs_set_header_flags(eb, flags & ~flag);
2011 return (flags & flag) == flag;
2014 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2016 u64 flags = btrfs_header_flags(eb);
2017 return flags >> BTRFS_BACKREF_REV_SHIFT;
2020 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2023 u64 flags = btrfs_header_flags(eb);
2024 flags &= ~BTRFS_BACKREF_REV_MASK;
2025 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2026 btrfs_set_header_flags(eb, flags);
2029 static inline unsigned long btrfs_header_fsid(void)
2031 return offsetof(struct btrfs_header, fsid);
2034 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2036 return offsetof(struct btrfs_header, chunk_tree_uuid);
2039 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2041 unsigned long ptr = offsetof(struct btrfs_header, csum);
2045 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2047 return (btrfs_header_level(eb) == 0);
2050 /* struct btrfs_root_item */
2051 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2053 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2054 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2055 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2057 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2059 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2060 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2061 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2062 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2063 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2064 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2065 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2066 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2068 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2072 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2074 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2076 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2079 static inline struct btrfs_timespec* btrfs_root_ctime(
2080 struct btrfs_root_item *root_item)
2082 unsigned long ptr = (unsigned long)root_item;
2083 ptr += offsetof(struct btrfs_root_item, ctime);
2084 return (struct btrfs_timespec *)ptr;
2087 static inline struct btrfs_timespec* btrfs_root_otime(
2088 struct btrfs_root_item *root_item)
2090 unsigned long ptr = (unsigned long)root_item;
2091 ptr += offsetof(struct btrfs_root_item, otime);
2092 return (struct btrfs_timespec *)ptr;
2095 static inline struct btrfs_timespec* btrfs_root_stime(
2096 struct btrfs_root_item *root_item)
2098 unsigned long ptr = (unsigned long)root_item;
2099 ptr += offsetof(struct btrfs_root_item, stime);
2100 return (struct btrfs_timespec *)ptr;
2103 static inline struct btrfs_timespec* btrfs_root_rtime(
2104 struct btrfs_root_item *root_item)
2106 unsigned long ptr = (unsigned long)root_item;
2107 ptr += offsetof(struct btrfs_root_item, rtime);
2108 return (struct btrfs_timespec *)ptr;
2111 /* struct btrfs_root_backup */
2112 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2114 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2116 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2117 tree_root_level, 8);
2119 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2121 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2122 chunk_root_gen, 64);
2123 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2124 chunk_root_level, 8);
2126 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2128 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2129 extent_root_gen, 64);
2130 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2131 extent_root_level, 8);
2133 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2135 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2137 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2140 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2142 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2144 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2147 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2149 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2151 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2152 csum_root_level, 8);
2153 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2160 /* struct btrfs_super_block */
2162 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2163 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2164 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2166 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2167 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2168 struct btrfs_super_block, sys_chunk_array_size, 32);
2169 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2170 struct btrfs_super_block, chunk_root_generation, 64);
2171 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2173 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2175 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2176 chunk_root_level, 8);
2177 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2179 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2180 log_root_transid, 64);
2181 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2187 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2191 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2193 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2194 root_dir_objectid, 64);
2195 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2197 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2199 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2200 compat_ro_flags, 64);
2201 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2202 incompat_flags, 64);
2203 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2205 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2206 cache_generation, 64);
2207 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2208 uuid_tree_generation, 64);
2209 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2211 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2213 int t = btrfs_super_csum_type(s);
2214 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2215 return btrfs_csum_sizes[t];
2218 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2220 return offsetof(struct btrfs_leaf, items);
2223 /* struct btrfs_file_extent_item */
2224 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2225 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2227 static inline unsigned long btrfs_file_extent_inline_start(struct
2228 btrfs_file_extent_item *e)
2230 unsigned long offset = (unsigned long)e;
2231 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2235 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2237 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2240 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2242 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2244 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2246 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2248 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2249 disk_num_bytes, 64);
2250 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2252 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2254 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2256 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2260 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2268 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2269 other_encoding, 16);
2271 /* btrfs_qgroup_status_item */
2272 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2274 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2276 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2278 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2281 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2282 struct btrfs_qgroup_status_item, version, 64);
2283 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2284 struct btrfs_qgroup_status_item, generation, 64);
2285 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2286 struct btrfs_qgroup_status_item, flags, 64);
2287 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2288 struct btrfs_qgroup_status_item, rescan, 64);
2290 /* btrfs_qgroup_info_item */
2291 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2293 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2295 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2296 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2297 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2299 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2300 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2302 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2303 struct btrfs_qgroup_info_item, generation, 64);
2304 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2305 struct btrfs_qgroup_info_item, referenced, 64);
2306 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2307 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2308 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2309 struct btrfs_qgroup_info_item, exclusive, 64);
2310 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2311 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2313 /* btrfs_qgroup_limit_item */
2314 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2316 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2317 max_referenced, 64);
2318 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2320 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2321 rsv_referenced, 64);
2322 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2325 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2326 struct btrfs_qgroup_limit_item, flags, 64);
2327 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2328 struct btrfs_qgroup_limit_item, max_referenced, 64);
2329 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2330 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2331 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2332 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2333 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2334 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2336 /* btrfs_balance_item */
2337 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2339 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2340 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2342 unsigned long offset = (unsigned long)bi;
2343 struct btrfs_balance_item *p;
2344 p = (struct btrfs_balance_item *)(eb->data + offset);
2348 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2349 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2351 unsigned long offset = (unsigned long)bi;
2352 struct btrfs_balance_item *p;
2353 p = (struct btrfs_balance_item *)(eb->data + offset);
2357 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2358 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2360 unsigned long offset = (unsigned long)bi;
2361 struct btrfs_balance_item *p;
2362 p = (struct btrfs_balance_item *)(eb->data + offset);
2367 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2368 * endiannes conversion, @dsi is offset to eb data
2370 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2371 struct btrfs_dev_stats_item *dsi)
2373 unsigned long offset = (unsigned long)dsi;
2374 struct btrfs_dev_stats_item *p;
2375 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2380 * this returns the number of bytes used by the item on disk, minus the
2381 * size of any extent headers. If a file is compressed on disk, this is
2382 * the compressed size
2384 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2385 struct btrfs_item *e)
2387 unsigned long offset;
2388 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2389 return btrfs_item_size(eb, e) - offset;
2392 /* struct btrfs_ioctl_search_header */
2393 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2395 return get_unaligned_64(&sh->transid);
2398 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2400 return get_unaligned_64(&sh->objectid);
2403 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2405 return get_unaligned_64(&sh->offset);
2408 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2410 return get_unaligned_32(&sh->type);
2413 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2415 return get_unaligned_32(&sh->len);
2418 /* this returns the number of file bytes represented by the inline item.
2419 * If an item is compressed, this is the uncompressed size
2421 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2423 struct btrfs_file_extent_item *fi)
2426 * return the space used on disk if this item isn't
2427 * compressed or encoded
2429 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2430 btrfs_file_extent_encryption(eb, fi) == 0 &&
2431 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2432 return btrfs_file_extent_inline_item_len(eb,
2433 btrfs_item_nr(slot));
2436 /* otherwise use the ram bytes field */
2437 return btrfs_file_extent_ram_bytes(eb, fi);
2440 #define btrfs_fs_incompat(fs_info, opt) \
2441 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2443 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2445 struct btrfs_super_block *disk_super;
2446 disk_super = fs_info->super_copy;
2447 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2450 #define btrfs_fs_compat_ro(fs_info, opt) \
2451 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2453 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2455 struct btrfs_super_block *disk_super;
2456 disk_super = fs_info->super_copy;
2457 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2460 /* helper function to cast into the data area of the leaf. */
2461 #define btrfs_item_ptr(leaf, slot, type) \
2462 ((type *)(btrfs_leaf_data(leaf) + \
2463 btrfs_item_offset_nr(leaf, slot)))
2465 #define btrfs_item_ptr_offset(leaf, slot) \
2466 ((unsigned long)(btrfs_leaf_data(leaf) + \
2467 btrfs_item_offset_nr(leaf, slot)))
2470 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2471 struct btrfs_root *root,
2472 u64 num_bytes, u64 empty_size,
2473 u64 hint_byte, u64 search_end,
2474 struct btrfs_key *ins, bool is_data);
2475 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2476 struct btrfs_root *root);
2477 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2478 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2479 u64 bytenr, u64 num_bytes);
2480 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root);
2482 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2483 btrfs_fs_info *info,
2485 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2486 btrfs_fs_info *info,
2488 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2489 struct btrfs_root *root,
2490 u32 blocksize, u64 root_objectid,
2491 struct btrfs_disk_key *key, int level,
2492 u64 hint, u64 empty_size);
2493 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2494 struct btrfs_root *root,
2495 u64 num_bytes, u64 parent,
2496 u64 root_objectid, u64 ref_generation,
2497 u64 owner, u64 empty_size, u64 hint_byte,
2498 u64 search_end, struct btrfs_key *ins, int data);
2499 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root, u64 bytenr,
2501 u64 offset, int metadata, u64 *refs, u64 *flags);
2502 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2503 struct btrfs_root *root,
2504 u64 bytenr, int level, u64 flags);
2505 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2506 struct extent_buffer *buf, int record_parent);
2507 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2508 struct extent_buffer *buf, int record_parent);
2509 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root,
2511 struct extent_buffer *buf,
2512 u64 parent, int last_ref);
2513 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2514 struct btrfs_root *root,
2515 u64 bytenr, u64 num_bytes, u64 parent,
2516 u64 root_objectid, u64 owner, u64 offset);
2517 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2518 struct btrfs_root *root,
2519 struct extent_io_tree *unpin);
2520 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2521 struct btrfs_root *root,
2522 u64 bytenr, u64 num_bytes, u64 parent,
2523 u64 root_objectid, u64 ref_generation,
2524 u64 owner_objectid);
2525 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root, u64 bytenr,
2527 u64 orig_parent, u64 parent,
2528 u64 root_objectid, u64 ref_generation,
2529 u64 owner_objectid);
2530 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *root);
2532 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2533 int btrfs_read_block_groups(struct btrfs_root *root);
2534 struct btrfs_block_group_cache *
2535 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2536 u64 chunk_offset, u64 size);
2537 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2538 struct btrfs_fs_info *fs_info, u64 bytes_used,
2539 u64 type, u64 chunk_offset, u64 size);
2540 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2541 struct btrfs_fs_info *fs_info);
2542 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2543 int alloc, int mark_free);
2544 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2545 struct btrfs_root *root, u64 objectid,
2546 struct btrfs_inode_item *inode,
2547 u64 file_pos, u64 disk_bytenr,
2549 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2550 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2551 void free_excluded_extents(struct btrfs_root *root,
2552 struct btrfs_block_group_cache *cache);
2553 int exclude_super_stripes(struct btrfs_root *root,
2554 struct btrfs_block_group_cache *cache);
2555 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2556 struct btrfs_fs_info *info, u64 start, u64 end);
2557 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2560 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2561 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2562 int level, int slot);
2563 enum btrfs_tree_block_status
2564 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2565 struct extent_buffer *buf);
2566 enum btrfs_tree_block_status
2567 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2568 struct extent_buffer *buf);
2569 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2570 int level, int slot, u64 objectid);
2571 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2572 struct extent_buffer *parent, int slot);
2573 int btrfs_previous_item(struct btrfs_root *root,
2574 struct btrfs_path *path, u64 min_objectid,
2576 int btrfs_previous_extent_item(struct btrfs_root *root,
2577 struct btrfs_path *path, u64 min_objectid);
2578 int btrfs_next_extent_item(struct btrfs_root *root,
2579 struct btrfs_path *path, u64 max_objectid);
2580 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2581 struct btrfs_root *root, struct extent_buffer *buf,
2582 struct extent_buffer *parent, int parent_slot,
2583 struct extent_buffer **cow_ret);
2584 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2585 struct btrfs_root *root,
2586 struct extent_buffer *buf,
2587 struct extent_buffer *parent, int parent_slot,
2588 struct extent_buffer **cow_ret,
2589 u64 search_start, u64 empty_size);
2590 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root,
2592 struct extent_buffer *buf,
2593 struct extent_buffer **cow_ret, u64 new_root_objectid);
2594 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2596 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2597 u32 new_size, int from_end);
2598 int btrfs_split_item(struct btrfs_trans_handle *trans,
2599 struct btrfs_root *root,
2600 struct btrfs_path *path,
2601 struct btrfs_key *new_key,
2602 unsigned long split_offset);
2603 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2604 *root, struct btrfs_key *key, struct btrfs_path *p, int
2606 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2607 u64 iobjectid, u64 ioff, u8 key_type,
2608 struct btrfs_key *found_key);
2609 void btrfs_release_path(struct btrfs_path *p);
2610 void add_root_to_dirty_list(struct btrfs_root *root);
2611 struct btrfs_path *btrfs_alloc_path(void);
2612 void btrfs_free_path(struct btrfs_path *p);
2613 void btrfs_init_path(struct btrfs_path *p);
2614 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2615 struct btrfs_path *path, int slot, int nr);
2617 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2618 struct btrfs_root *root,
2619 struct btrfs_path *path)
2621 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2624 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2625 *root, struct btrfs_key *key, void *data, u32 data_size);
2626 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2627 struct btrfs_root *root,
2628 struct btrfs_path *path,
2629 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2631 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root,
2633 struct btrfs_path *path,
2634 struct btrfs_key *key,
2637 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2640 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2641 static inline int btrfs_next_item(struct btrfs_root *root,
2642 struct btrfs_path *p)
2645 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2646 return btrfs_next_leaf(root, p);
2650 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2651 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2652 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2653 struct btrfs_disk_key *key, int level);
2654 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2655 struct btrfs_key *new_key);
2656 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2657 struct btrfs_path *path,
2658 struct btrfs_key *new_key);
2661 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2662 struct btrfs_root *tree_root,
2663 u64 root_id, u8 type, u64 ref_id,
2664 u64 dirid, u64 sequence,
2665 const char *name, int name_len);
2666 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2667 *root, struct btrfs_key *key, struct btrfs_root_item
2669 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2670 struct btrfs_key *key);
2671 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2672 *root, struct btrfs_key *key, struct btrfs_root_item
2674 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2675 btrfs_root_item *item, struct btrfs_key *key);
2677 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2678 *root, const char *name, int name_len, u64 dir,
2679 struct btrfs_key *location, u8 type, u64 index);
2680 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2681 struct btrfs_root *root,
2682 struct btrfs_path *path, u64 dir,
2683 const char *name, int name_len,
2685 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2686 struct btrfs_root *root,
2687 struct btrfs_path *path, u64 dir,
2688 const char *name, int name_len,
2689 u64 index, int mod);
2690 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2691 struct btrfs_root *root,
2692 struct btrfs_path *path,
2693 struct btrfs_dir_item *di);
2694 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2695 struct btrfs_root *root, const char *name,
2696 u16 name_len, const void *data, u16 data_len,
2699 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *fs_root,
2701 u64 dirid, u64 *objectid);
2704 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root,
2706 const char *name, int name_len,
2707 u64 inode_objectid, u64 ref_objectid, u64 index);
2708 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2709 *root, u64 objectid, struct btrfs_inode_item
2711 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2712 *root, struct btrfs_path *path,
2713 struct btrfs_key *location, int mod);
2714 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2715 *trans, struct btrfs_path *path, struct btrfs_root *root,
2716 u64 ino, u64 parent_ino, u64 index, const char *name,
2717 int namelen, int ins_len);
2718 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2719 struct btrfs_root *root,
2720 const char *name, int name_len,
2721 u64 inode_objectid, u64 ref_objectid,
2723 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2724 struct btrfs_root *root,
2725 const char *name, int name_len,
2726 u64 inode_objectid, u64 ref_objectid, u64 index);
2727 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2728 struct btrfs_root *root, struct btrfs_path *path,
2729 const char *name, int namelen, u64 ino, u64 parent_ino,
2731 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2732 struct btrfs_root *root, const char *name, int name_len,
2733 u64 ino, u64 parent_ino, u64 *index);
2736 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root, u64 bytenr, u64 len);
2738 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2739 struct btrfs_root *root,
2740 u64 objectid, u64 pos, u64 offset,
2743 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root, u64 objectid,
2745 u64 offset, const char *buffer, size_t size);
2746 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *root, u64 alloc_end,
2748 u64 bytenr, char *data, size_t len);
2749 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2750 struct btrfs_root *root, struct btrfs_path *path,
2754 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2755 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2758 static inline int is_fstree(u64 rootid)
2760 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2761 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2767 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2768 u64 dir, u64 index);
2769 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2771 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2772 struct btrfs_root *root, u64 ino, u64 flags);
2773 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2774 u64 ino, u64 parent_ino, char *name, int namelen,
2775 u8 type, u64 *index, int add_backref, int ignore_existed);
2776 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2777 u64 ino, u64 parent_ino, u64 index, const char *name,
2778 int namelen, int add_orphan);
2779 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2780 struct btrfs_root *root, struct btrfs_path *path,
2782 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2783 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2784 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2785 u64 root_objectid, bool convert);
2788 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2789 struct btrfs_root *root,
2790 struct btrfs_path *path,
2791 u64 ino, u64 offset, u64 len, int ins_len);
2792 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2793 struct btrfs_root *root,
2794 u64 ino, u64 offset, u64 len);
2795 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,