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_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r->fs_info) - \
363 sizeof(struct btrfs_item) -\
364 sizeof(struct btrfs_dir_item))
368 * this is a very generous portion of the super block, giving us
369 * room to translate 14 chunks with 3 stripes each.
371 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
372 #define BTRFS_LABEL_SIZE 256
375 * just in case we somehow lose the roots and are not able to mount,
376 * we store an array of the roots from previous transactions
379 #define BTRFS_NUM_BACKUP_ROOTS 4
380 struct btrfs_root_backup {
382 __le64 tree_root_gen;
385 __le64 chunk_root_gen;
388 __le64 extent_root_gen;
397 __le64 csum_root_gen;
407 u8 extent_root_level;
411 /* future and to align */
413 } __attribute__ ((__packed__));
416 * the super block basically lists the main trees of the FS
417 * it currently lacks any block count etc etc
419 struct btrfs_super_block {
420 u8 csum[BTRFS_CSUM_SIZE];
421 /* the first 3 fields must match struct btrfs_header */
422 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
423 __le64 bytenr; /* this block number */
426 /* allowed to be different from the btrfs_header from here own down */
433 /* this will help find the new super based on the log root */
434 __le64 log_root_transid;
437 __le64 root_dir_objectid;
441 /* Unused and must be equal to nodesize */
442 __le32 __unused_leafsize;
444 __le32 sys_chunk_array_size;
445 __le64 chunk_root_generation;
447 __le64 compat_ro_flags;
448 __le64 incompat_flags;
453 struct btrfs_dev_item dev_item;
455 char label[BTRFS_LABEL_SIZE];
457 __le64 cache_generation;
458 __le64 uuid_tree_generation;
460 /* future expansion */
462 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
463 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
464 } __attribute__ ((__packed__));
467 * Compat flags that we support. If any incompat flags are set other than the
468 * ones specified below then we will fail to mount
470 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
472 * Older kernels on big-endian systems produced broken free space tree bitmaps,
473 * and btrfs-progs also used to corrupt the free space tree. If this bit is
474 * clear, then the free space tree cannot be trusted. btrfs-progs can also
475 * intentionally clear this bit to ask the kernel to rebuild the free space
478 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
480 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
481 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
482 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
483 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
484 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
487 * older kernels tried to do bigger metadata blocks, but the
488 * code was pretty buggy. Lets not let them try anymore.
490 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
491 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
492 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
493 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
494 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
496 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
499 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
500 * added here until read-write support for the free space tree is implemented in
503 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
505 #define BTRFS_FEATURE_INCOMPAT_SUPP \
506 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
507 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
508 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
509 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
510 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
511 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
512 BTRFS_FEATURE_INCOMPAT_RAID56 | \
513 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
514 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
515 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
518 * A leaf is full of items. offset and size tell us where to find
519 * the item in the leaf (relative to the start of the data area)
522 struct btrfs_disk_key key;
525 } __attribute__ ((__packed__));
528 * leaves have an item area and a data area:
529 * [item0, item1....itemN] [free space] [dataN...data1, data0]
531 * The data is separate from the items to get the keys closer together
535 struct btrfs_header header;
536 struct btrfs_item items[];
537 } __attribute__ ((__packed__));
540 * all non-leaf blocks are nodes, they hold only keys and pointers to
543 struct btrfs_key_ptr {
544 struct btrfs_disk_key key;
547 } __attribute__ ((__packed__));
550 struct btrfs_header header;
551 struct btrfs_key_ptr ptrs[];
552 } __attribute__ ((__packed__));
555 * btrfs_paths remember the path taken from the root down to the leaf.
556 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
557 * to any other levels that are present.
559 * The slots array records the index of the item or block pointer
560 * used while walking the tree.
564 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
565 int slots[BTRFS_MAX_LEVEL];
567 /* The kernel locking sheme is not done in userspace. */
568 int locks[BTRFS_MAX_LEVEL];
571 /* keep some upper locks as we walk down */
575 * set by btrfs_split_item, tells search_slot to keep all locks
576 * and to force calls to keep space in the nodes
583 * items in the extent btree are used to record the objectid of the
584 * owner of the block and the number of references
587 struct btrfs_extent_item {
591 } __attribute__ ((__packed__));
593 struct btrfs_extent_item_v0 {
595 } __attribute__ ((__packed__));
597 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
598 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
599 sizeof(struct btrfs_item))
600 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
602 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
603 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
605 /* following flags only apply to tree blocks */
607 /* use full backrefs for extent pointers in the block*/
608 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
610 struct btrfs_tree_block_info {
611 struct btrfs_disk_key key;
613 } __attribute__ ((__packed__));
615 struct btrfs_extent_data_ref {
620 } __attribute__ ((__packed__));
622 struct btrfs_shared_data_ref {
624 } __attribute__ ((__packed__));
626 struct btrfs_extent_inline_ref {
629 } __attribute__ ((__packed__));
631 struct btrfs_extent_ref_v0 {
636 } __attribute__ ((__packed__));
638 /* dev extents record free space on individual devices. The owner
639 * field points back to the chunk allocation mapping tree that allocated
640 * the extent. The chunk tree uuid field is a way to double check the owner
642 struct btrfs_dev_extent {
644 __le64 chunk_objectid;
647 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
648 } __attribute__ ((__packed__));
650 struct btrfs_inode_ref {
654 } __attribute__ ((__packed__));
656 struct btrfs_inode_extref {
657 __le64 parent_objectid;
660 __u8 name[0]; /* name goes here */
661 } __attribute__ ((__packed__));
663 struct btrfs_timespec {
666 } __attribute__ ((__packed__));
669 BTRFS_COMPRESS_NONE = 0,
670 BTRFS_COMPRESS_ZLIB = 1,
671 BTRFS_COMPRESS_LZO = 2,
672 BTRFS_COMPRESS_ZSTD = 3,
673 BTRFS_COMPRESS_TYPES = 3,
674 BTRFS_COMPRESS_LAST = 4,
675 } btrfs_compression_type;
677 /* we don't understand any encryption methods right now */
679 BTRFS_ENCRYPTION_NONE = 0,
680 BTRFS_ENCRYPTION_LAST = 1,
681 } btrfs_encryption_type;
683 enum btrfs_tree_block_status {
684 BTRFS_TREE_BLOCK_CLEAN,
685 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
686 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
687 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
688 BTRFS_TREE_BLOCK_INVALID_LEVEL,
689 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
690 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
693 struct btrfs_inode_item {
694 /* nfs style generation number */
696 /* transid that last touched this inode */
708 /* modification sequence number for NFS */
712 * a little future expansion, for more than this we can
713 * just grow the inode item and version it
716 struct btrfs_timespec atime;
717 struct btrfs_timespec ctime;
718 struct btrfs_timespec mtime;
719 struct btrfs_timespec otime;
720 } __attribute__ ((__packed__));
722 struct btrfs_dir_log_item {
724 } __attribute__ ((__packed__));
726 struct btrfs_dir_item {
727 struct btrfs_disk_key location;
732 } __attribute__ ((__packed__));
734 struct btrfs_root_item_v0 {
735 struct btrfs_inode_item inode;
741 __le64 last_snapshot;
744 struct btrfs_disk_key drop_progress;
747 } __attribute__ ((__packed__));
749 struct btrfs_root_item {
750 struct btrfs_inode_item inode;
756 __le64 last_snapshot;
759 struct btrfs_disk_key drop_progress;
764 * The following fields appear after subvol_uuids+subvol_times
769 * This generation number is used to test if the new fields are valid
770 * and up to date while reading the root item. Every time the root item
771 * is written out, the "generation" field is copied into this field. If
772 * anyone ever mounted the fs with an older kernel, we will have
773 * mismatching generation values here and thus must invalidate the
774 * new fields. See btrfs_update_root and btrfs_find_last_root for
776 * the offset of generation_v2 is also used as the start for the memset
777 * when invalidating the fields.
779 __le64 generation_v2;
780 u8 uuid[BTRFS_UUID_SIZE];
781 u8 parent_uuid[BTRFS_UUID_SIZE];
782 u8 received_uuid[BTRFS_UUID_SIZE];
783 __le64 ctransid; /* updated when an inode changes */
784 __le64 otransid; /* trans when created */
785 __le64 stransid; /* trans when sent. non-zero for received subvol */
786 __le64 rtransid; /* trans when received. non-zero for received subvol */
787 struct btrfs_timespec ctime;
788 struct btrfs_timespec otime;
789 struct btrfs_timespec stime;
790 struct btrfs_timespec rtime;
791 __le64 reserved[8]; /* for future */
792 } __attribute__ ((__packed__));
795 * this is used for both forward and backward root refs
797 struct btrfs_root_ref {
801 } __attribute__ ((__packed__));
803 struct btrfs_disk_balance_args {
805 * profiles to operate on, single is denoted by
806 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
812 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
813 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
826 /* devid subset filter [pstart..pend) */
830 /* btrfs virtual address space subset filter [vstart..vend) */
835 * profile to convert to, single is denoted by
836 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
840 /* BTRFS_BALANCE_ARGS_* */
844 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
845 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
857 * Process chunks that cross stripes_min..stripes_max devices,
858 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
864 } __attribute__ ((__packed__));
867 * store balance parameters to disk so that balance can be properly
868 * resumed after crash or unmount
870 struct btrfs_balance_item {
871 /* BTRFS_BALANCE_* */
874 struct btrfs_disk_balance_args data;
875 struct btrfs_disk_balance_args meta;
876 struct btrfs_disk_balance_args sys;
879 } __attribute__ ((__packed__));
881 #define BTRFS_FILE_EXTENT_INLINE 0
882 #define BTRFS_FILE_EXTENT_REG 1
883 #define BTRFS_FILE_EXTENT_PREALLOC 2
885 struct btrfs_file_extent_item {
887 * transaction id that created this extent
891 * max number of bytes to hold this extent in ram
892 * when we split a compressed extent we can't know how big
893 * each of the resulting pieces will be. So, this is
894 * an upper limit on the size of the extent in ram instead of
900 * 32 bits for the various ways we might encode the data,
901 * including compression and encryption. If any of these
902 * are set to something a given disk format doesn't understand
903 * it is treated like an incompat flag for reading and writing,
908 __le16 other_encoding; /* spare for later use */
910 /* are we inline data or a real extent? */
914 * disk space consumed by the extent, checksum blocks are included
918 __le64 disk_num_bytes;
920 * the logical offset in file blocks (no csums)
921 * this extent record is for. This allows a file extent to point
922 * into the middle of an existing extent on disk, sharing it
923 * between two snapshots (useful if some bytes in the middle of the
924 * extent have changed
928 * the logical number of file blocks (no csums included)
932 } __attribute__ ((__packed__));
934 struct btrfs_dev_stats_item {
936 * grow this item struct at the end for future enhancements and keep
937 * the existing values unchanged
939 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
940 } __attribute__ ((__packed__));
942 struct btrfs_csum_item {
944 } __attribute__ ((__packed__));
947 * We don't want to overwrite 1M at the beginning of device, even though
948 * there is our 1st superblock at 64k. Some possible reasons:
949 * - the first 64k blank is useful for some boot loader/manager
950 * - the first 1M could be scratched by buggy partitioner or somesuch
952 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
954 /* tag for the radix tree of block groups in ram */
955 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
956 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
957 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
958 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
959 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
960 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
961 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
962 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
963 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
964 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
965 #define BTRFS_NR_RAID_TYPES 7
967 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
968 BTRFS_BLOCK_GROUP_SYSTEM | \
969 BTRFS_BLOCK_GROUP_METADATA)
971 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
972 BTRFS_BLOCK_GROUP_RAID1 | \
973 BTRFS_BLOCK_GROUP_RAID5 | \
974 BTRFS_BLOCK_GROUP_RAID6 | \
975 BTRFS_BLOCK_GROUP_DUP | \
976 BTRFS_BLOCK_GROUP_RAID10)
978 /* used in struct btrfs_balance_args fields */
979 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
982 * GLOBAL_RSV does not exist as a on-disk block group type and is used
983 * internally for exporting info about global block reserve from space infos
985 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
987 #define BTRFS_QGROUP_LEVEL_SHIFT 48
989 static inline u64 btrfs_qgroup_level(u64 qgroupid)
991 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
994 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
996 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
999 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
1000 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
1001 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
1003 struct btrfs_qgroup_status_item {
1007 __le64 rescan; /* progress during scanning */
1008 } __attribute__ ((__packed__));
1010 struct btrfs_block_group_item {
1012 __le64 chunk_objectid;
1014 } __attribute__ ((__packed__));
1016 struct btrfs_free_space_info {
1017 __le32 extent_count;
1019 } __attribute__ ((__packed__));
1021 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1023 struct btrfs_qgroup_info_item {
1026 __le64 referenced_compressed;
1028 __le64 exclusive_compressed;
1029 } __attribute__ ((__packed__));
1031 /* flags definition for qgroup limits */
1032 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1033 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1034 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1035 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1036 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1037 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1039 struct btrfs_qgroup_limit_item {
1041 __le64 max_referenced;
1042 __le64 max_exclusive;
1043 __le64 rsv_referenced;
1044 __le64 rsv_exclusive;
1045 } __attribute__ ((__packed__));
1047 struct btrfs_space_info {
1053 struct list_head list;
1056 struct btrfs_block_group_cache {
1057 struct cache_extent cache;
1058 struct btrfs_key key;
1059 struct btrfs_block_group_item item;
1060 struct btrfs_space_info *space_info;
1061 struct btrfs_free_space_ctl *free_space_ctl;
1069 struct btrfs_device;
1070 struct btrfs_fs_devices;
1071 struct btrfs_fs_info {
1072 u8 fsid[BTRFS_FSID_SIZE];
1074 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1075 u8 *new_chunk_tree_uuid;
1076 struct btrfs_root *fs_root;
1077 struct btrfs_root *extent_root;
1078 struct btrfs_root *tree_root;
1079 struct btrfs_root *chunk_root;
1080 struct btrfs_root *dev_root;
1081 struct btrfs_root *csum_root;
1082 struct btrfs_root *quota_root;
1083 struct btrfs_root *free_space_root;
1085 struct rb_root fs_root_tree;
1087 /* the log root tree is a directory of all the other log roots */
1088 struct btrfs_root *log_root_tree;
1090 struct extent_io_tree extent_cache;
1091 struct extent_io_tree free_space_cache;
1092 struct extent_io_tree block_group_cache;
1093 struct extent_io_tree pinned_extents;
1094 struct extent_io_tree pending_del;
1095 struct extent_io_tree extent_ins;
1096 struct extent_io_tree *excluded_extents;
1098 /* logical->physical extent mapping */
1099 struct btrfs_mapping_tree mapping_tree;
1102 u64 last_trans_committed;
1104 u64 avail_data_alloc_bits;
1105 u64 avail_metadata_alloc_bits;
1106 u64 avail_system_alloc_bits;
1107 u64 data_alloc_profile;
1108 u64 metadata_alloc_profile;
1109 u64 system_alloc_profile;
1112 struct btrfs_trans_handle *running_transaction;
1113 struct btrfs_super_block *super_copy;
1114 struct mutex fs_mutex;
1119 struct list_head dirty_cowonly_roots;
1120 struct list_head recow_ebs;
1122 struct btrfs_fs_devices *fs_devices;
1123 struct list_head space_info;
1125 unsigned int system_allocs:1;
1126 unsigned int readonly:1;
1127 unsigned int on_restoring:1;
1128 unsigned int is_chunk_recover:1;
1129 unsigned int quota_enabled:1;
1130 unsigned int suppress_check_block_errors:1;
1131 unsigned int ignore_fsid_mismatch:1;
1132 unsigned int ignore_chunk_tree_error:1;
1133 unsigned int avoid_meta_chunk_alloc:1;
1134 unsigned int avoid_sys_chunk_alloc:1;
1135 unsigned int finalize_on_close:1;
1137 int transaction_aborted;
1139 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1140 struct btrfs_root *root,
1141 u64 bytenr, u64 num_bytes, u64 parent,
1142 u64 root_objectid, u64 owner, u64 offset,
1144 struct cache_tree *fsck_extent_cache;
1145 struct cache_tree *corrupt_blocks;
1147 /* Cached block sizes */
1154 * in ram representation of the tree. extent_root is used for all allocations
1155 * and for the extent tree extent_root root.
1158 struct extent_buffer *node;
1159 struct extent_buffer *commit_root;
1160 struct btrfs_root_item root_item;
1161 struct btrfs_key root_key;
1162 struct btrfs_fs_info *fs_info;
1171 u64 last_inode_alloc;
1174 * Record orphan data extent ref
1176 * TODO: Don't restore things in btrfs_root.
1177 * Directly record it into inode_record, which needs a lot of
1178 * infrastructure change to allow cooperation between extent
1181 struct list_head orphan_data_extents;
1183 /* the dirty list is only used by non-reference counted roots */
1184 struct list_head dirty_list;
1185 struct rb_node rb_node;
1188 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1190 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1193 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1195 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1198 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1199 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1200 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1202 return BTRFS_MAX_ITEM_SIZE(info) -
1203 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1207 * inode items have the data typically returned from stat and store other
1208 * info about object characteristics. There is one for every file and dir in
1211 #define BTRFS_INODE_ITEM_KEY 1
1212 #define BTRFS_INODE_REF_KEY 12
1213 #define BTRFS_INODE_EXTREF_KEY 13
1214 #define BTRFS_XATTR_ITEM_KEY 24
1215 #define BTRFS_ORPHAN_ITEM_KEY 48
1217 #define BTRFS_DIR_LOG_ITEM_KEY 60
1218 #define BTRFS_DIR_LOG_INDEX_KEY 72
1220 * dir items are the name -> inode pointers in a directory. There is one
1221 * for every name in a directory.
1223 #define BTRFS_DIR_ITEM_KEY 84
1224 #define BTRFS_DIR_INDEX_KEY 96
1227 * extent data is for file data
1229 #define BTRFS_EXTENT_DATA_KEY 108
1232 * csum items have the checksums for data in the extents
1234 #define BTRFS_CSUM_ITEM_KEY 120
1236 * extent csums are stored in a separate tree and hold csums for
1237 * an entire extent on disk.
1239 #define BTRFS_EXTENT_CSUM_KEY 128
1242 * root items point to tree roots. There are typically in the root
1243 * tree used by the super block to find all the other trees
1245 #define BTRFS_ROOT_ITEM_KEY 132
1248 * root backrefs tie subvols and snapshots to the directory entries that
1251 #define BTRFS_ROOT_BACKREF_KEY 144
1254 * root refs make a fast index for listing all of the snapshots and
1255 * subvolumes referenced by a given root. They point directly to the
1256 * directory item in the root that references the subvol
1258 #define BTRFS_ROOT_REF_KEY 156
1261 * extent items are in the extent map tree. These record which blocks
1262 * are used, and how many references there are to each block
1264 #define BTRFS_EXTENT_ITEM_KEY 168
1267 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1268 * the length, so we save the level in key->offset instead of the length.
1270 #define BTRFS_METADATA_ITEM_KEY 169
1272 #define BTRFS_TREE_BLOCK_REF_KEY 176
1274 #define BTRFS_EXTENT_DATA_REF_KEY 178
1276 /* old style extent backrefs */
1277 #define BTRFS_EXTENT_REF_V0_KEY 180
1279 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1281 #define BTRFS_SHARED_DATA_REF_KEY 184
1285 * block groups give us hints into the extent allocation trees. Which
1286 * blocks are free etc etc
1288 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1291 * Every block group is represented in the free space tree by a free space info
1292 * item, which stores some accounting information. It is keyed on
1293 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1295 #define BTRFS_FREE_SPACE_INFO_KEY 198
1298 * A free space extent tracks an extent of space that is free in a block group.
1299 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1301 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1304 * When a block group becomes very fragmented, we convert it to use bitmaps
1305 * instead of extents. A free space bitmap is keyed on
1306 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1307 * (length / sectorsize) bits.
1309 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1311 #define BTRFS_DEV_EXTENT_KEY 204
1312 #define BTRFS_DEV_ITEM_KEY 216
1313 #define BTRFS_CHUNK_ITEM_KEY 228
1315 #define BTRFS_BALANCE_ITEM_KEY 248
1320 #define BTRFS_QGROUP_STATUS_KEY 240
1321 #define BTRFS_QGROUP_INFO_KEY 242
1322 #define BTRFS_QGROUP_LIMIT_KEY 244
1323 #define BTRFS_QGROUP_RELATION_KEY 246
1326 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1328 #define BTRFS_BALANCE_ITEM_KEY 248
1331 * The key type for tree items that are stored persistently, but do not need to
1332 * exist for extended period of time. The items can exist in any tree.
1334 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1338 * - balance status item
1339 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1341 #define BTRFS_TEMPORARY_ITEM_KEY 248
1344 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1346 #define BTRFS_DEV_STATS_KEY 249
1349 * The key type for tree items that are stored persistently and usually exist
1350 * for a long period, eg. filesystem lifetime. The item kinds can be status
1351 * information, stats or preference values. The item can exist in any tree.
1353 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1357 * - device statistics, store IO stats in the device tree, one key for all
1359 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1361 #define BTRFS_PERSISTENT_ITEM_KEY 249
1364 * Persistently stores the device replace state in the device tree.
1365 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1367 #define BTRFS_DEV_REPLACE_KEY 250
1370 * Stores items that allow to quickly map UUIDs to something else.
1371 * These items are part of the filesystem UUID tree.
1372 * The key is built like this:
1373 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1375 #if BTRFS_UUID_SIZE != 16
1376 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1378 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1379 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1380 * received subvols */
1383 * string items are for debugging. They just store a short string of
1386 #define BTRFS_STRING_ITEM_KEY 253
1390 #define BTRFS_INODE_NODATASUM (1 << 0)
1391 #define BTRFS_INODE_NODATACOW (1 << 1)
1392 #define BTRFS_INODE_READONLY (1 << 2)
1393 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1394 #define BTRFS_INODE_PREALLOC (1 << 4)
1395 #define BTRFS_INODE_SYNC (1 << 5)
1396 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1397 #define BTRFS_INODE_APPEND (1 << 7)
1398 #define BTRFS_INODE_NODUMP (1 << 8)
1399 #define BTRFS_INODE_NOATIME (1 << 9)
1400 #define BTRFS_INODE_DIRSYNC (1 << 10)
1401 #define BTRFS_INODE_COMPRESS (1 << 11)
1403 #define read_eb_member(eb, ptr, type, member, result) ( \
1404 read_extent_buffer(eb, (char *)(result), \
1405 ((unsigned long)(ptr)) + \
1406 offsetof(type, member), \
1407 sizeof(((type *)0)->member)))
1409 #define write_eb_member(eb, ptr, type, member, result) ( \
1410 write_extent_buffer(eb, (char *)(result), \
1411 ((unsigned long)(ptr)) + \
1412 offsetof(type, member), \
1413 sizeof(((type *)0)->member)))
1415 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1416 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1418 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1419 return le##bits##_to_cpu(h->member); \
1421 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1424 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1425 h->member = cpu_to_le##bits(val); \
1428 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1429 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1432 unsigned long offset = (unsigned long)s; \
1433 const type *p = (type *) (eb->data + offset); \
1434 return get_unaligned_le##bits(&p->member); \
1436 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1437 type *s, u##bits val) \
1439 unsigned long offset = (unsigned long)s; \
1440 type *p = (type *) (eb->data + offset); \
1441 put_unaligned_le##bits(val, &p->member); \
1444 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1445 static inline u##bits btrfs_##name(const type *s) \
1447 return le##bits##_to_cpu(s->member); \
1449 static inline void btrfs_set_##name(type *s, u##bits val) \
1451 s->member = cpu_to_le##bits(val); \
1454 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1455 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1456 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1457 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1458 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1459 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1461 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1462 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1463 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1464 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1465 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1466 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1471 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1473 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1475 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1477 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1479 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1482 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1484 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1486 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1489 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1491 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1494 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1496 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1499 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1500 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1501 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1502 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1503 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1504 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1505 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1506 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1507 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1508 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1509 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1511 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1513 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1516 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1520 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1522 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1524 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1526 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1531 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1532 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1534 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1537 unsigned long offset = (unsigned long)c;
1538 offset += offsetof(struct btrfs_chunk, stripe);
1539 offset += nr * sizeof(struct btrfs_stripe);
1540 return (struct btrfs_stripe *)offset;
1543 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1545 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1548 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1549 struct btrfs_chunk *c, int nr)
1551 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1554 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1555 struct btrfs_chunk *c, int nr,
1558 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1561 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1562 struct btrfs_chunk *c, int nr)
1564 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1567 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1568 struct btrfs_chunk *c, int nr,
1571 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1574 /* struct btrfs_block_group_item */
1575 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1577 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1579 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1580 struct btrfs_block_group_item, chunk_objectid, 64);
1582 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1583 struct btrfs_block_group_item, chunk_objectid, 64);
1584 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1585 struct btrfs_block_group_item, flags, 64);
1586 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1587 struct btrfs_block_group_item, flags, 64);
1589 /* struct btrfs_free_space_info */
1590 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1592 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1594 /* struct btrfs_inode_ref */
1595 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1596 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1597 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1599 /* struct btrfs_inode_extref */
1600 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1601 parent_objectid, 64);
1602 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1604 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1606 /* struct btrfs_inode_item */
1607 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1608 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1609 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1610 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1611 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1612 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1613 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1614 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1615 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1616 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1617 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1618 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1621 struct btrfs_inode_item, generation, 64);
1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1623 struct btrfs_inode_item, sequence, 64);
1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1625 struct btrfs_inode_item, transid, 64);
1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1627 struct btrfs_inode_item, size, 64);
1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1629 struct btrfs_inode_item, nbytes, 64);
1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1631 struct btrfs_inode_item, block_group, 64);
1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1633 struct btrfs_inode_item, nlink, 32);
1634 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1635 struct btrfs_inode_item, uid, 32);
1636 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1637 struct btrfs_inode_item, gid, 32);
1638 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1639 struct btrfs_inode_item, mode, 32);
1640 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1641 struct btrfs_inode_item, rdev, 64);
1642 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1643 struct btrfs_inode_item, flags, 64);
1645 static inline struct btrfs_timespec *
1646 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1648 unsigned long ptr = (unsigned long)inode_item;
1649 ptr += offsetof(struct btrfs_inode_item, atime);
1650 return (struct btrfs_timespec *)ptr;
1653 static inline struct btrfs_timespec *
1654 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1656 unsigned long ptr = (unsigned long)inode_item;
1657 ptr += offsetof(struct btrfs_inode_item, mtime);
1658 return (struct btrfs_timespec *)ptr;
1661 static inline struct btrfs_timespec *
1662 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1664 unsigned long ptr = (unsigned long)inode_item;
1665 ptr += offsetof(struct btrfs_inode_item, ctime);
1666 return (struct btrfs_timespec *)ptr;
1669 static inline struct btrfs_timespec *
1670 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1672 unsigned long ptr = (unsigned long)inode_item;
1673 ptr += offsetof(struct btrfs_inode_item, otime);
1674 return (struct btrfs_timespec *)ptr;
1677 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1678 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1679 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1681 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1684 /* struct btrfs_dev_extent */
1685 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1687 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1688 chunk_objectid, 64);
1689 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1691 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1693 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1696 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1698 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1699 return (u8 *)((unsigned long)dev + ptr);
1703 /* struct btrfs_extent_item */
1704 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1705 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1706 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1708 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1709 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1711 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1713 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1715 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1716 struct btrfs_tree_block_info *item,
1717 struct btrfs_disk_key *key)
1719 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1722 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1723 struct btrfs_tree_block_info *item,
1724 struct btrfs_disk_key *key)
1726 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1729 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1731 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1733 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1735 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1738 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1741 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1743 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1745 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1746 struct btrfs_extent_inline_ref, type, 8);
1747 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1748 struct btrfs_extent_inline_ref, offset, 64);
1750 static inline u32 btrfs_extent_inline_ref_size(int type)
1752 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1753 type == BTRFS_SHARED_BLOCK_REF_KEY)
1754 return sizeof(struct btrfs_extent_inline_ref);
1755 if (type == BTRFS_SHARED_DATA_REF_KEY)
1756 return sizeof(struct btrfs_shared_data_ref) +
1757 sizeof(struct btrfs_extent_inline_ref);
1758 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1759 return sizeof(struct btrfs_extent_data_ref) +
1760 offsetof(struct btrfs_extent_inline_ref, offset);
1765 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1766 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1768 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1769 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1771 /* struct btrfs_node */
1772 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1773 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1775 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1778 ptr = offsetof(struct btrfs_node, ptrs) +
1779 sizeof(struct btrfs_key_ptr) * nr;
1780 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1783 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1787 ptr = offsetof(struct btrfs_node, ptrs) +
1788 sizeof(struct btrfs_key_ptr) * nr;
1789 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1792 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1795 ptr = offsetof(struct btrfs_node, ptrs) +
1796 sizeof(struct btrfs_key_ptr) * nr;
1797 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1800 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1804 ptr = offsetof(struct btrfs_node, ptrs) +
1805 sizeof(struct btrfs_key_ptr) * nr;
1806 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1809 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1811 return offsetof(struct btrfs_node, ptrs) +
1812 sizeof(struct btrfs_key_ptr) * nr;
1815 static inline void btrfs_node_key(struct extent_buffer *eb,
1816 struct btrfs_disk_key *disk_key, int nr)
1819 ptr = btrfs_node_key_ptr_offset(nr);
1820 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1821 struct btrfs_key_ptr, key, disk_key);
1824 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1825 struct btrfs_disk_key *disk_key, int nr)
1828 ptr = btrfs_node_key_ptr_offset(nr);
1829 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1830 struct btrfs_key_ptr, key, disk_key);
1833 /* struct btrfs_item */
1834 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1835 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1837 static inline unsigned long btrfs_item_nr_offset(int nr)
1839 return offsetof(struct btrfs_leaf, items) +
1840 sizeof(struct btrfs_item) * nr;
1843 static inline struct btrfs_item *btrfs_item_nr(int nr)
1845 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1848 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1849 struct btrfs_item *item)
1851 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1854 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1856 return btrfs_item_end(eb, btrfs_item_nr(nr));
1859 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1861 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1864 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1866 return btrfs_item_size(eb, btrfs_item_nr(nr));
1869 static inline void btrfs_item_key(struct extent_buffer *eb,
1870 struct btrfs_disk_key *disk_key, int nr)
1872 struct btrfs_item *item = btrfs_item_nr(nr);
1873 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1876 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1877 struct btrfs_disk_key *disk_key, int nr)
1879 struct btrfs_item *item = btrfs_item_nr(nr);
1880 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1883 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1886 * struct btrfs_root_ref
1888 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1889 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1892 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1893 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1894 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1896 /* struct btrfs_dir_item */
1897 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1898 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1899 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1900 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1902 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1903 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1904 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1905 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1907 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1908 struct btrfs_dir_item *item,
1909 struct btrfs_disk_key *key)
1911 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1914 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1915 struct btrfs_dir_item *item,
1916 struct btrfs_disk_key *key)
1918 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1921 /* struct btrfs_free_space_header */
1922 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1924 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1926 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1929 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1930 struct btrfs_free_space_header *h,
1931 struct btrfs_disk_key *key)
1933 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1936 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1937 struct btrfs_free_space_header *h,
1938 struct btrfs_disk_key *key)
1940 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1943 /* struct btrfs_disk_key */
1944 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1946 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1947 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1949 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1950 struct btrfs_disk_key *disk)
1952 cpu->offset = le64_to_cpu(disk->offset);
1953 cpu->type = disk->type;
1954 cpu->objectid = le64_to_cpu(disk->objectid);
1957 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1958 struct btrfs_key *cpu)
1960 disk->offset = cpu_to_le64(cpu->offset);
1961 disk->type = cpu->type;
1962 disk->objectid = cpu_to_le64(cpu->objectid);
1965 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1966 struct btrfs_key *key, int nr)
1968 struct btrfs_disk_key disk_key;
1969 btrfs_node_key(eb, &disk_key, nr);
1970 btrfs_disk_key_to_cpu(key, &disk_key);
1973 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1974 struct btrfs_key *key, int nr)
1976 struct btrfs_disk_key disk_key;
1977 btrfs_item_key(eb, &disk_key, nr);
1978 btrfs_disk_key_to_cpu(key, &disk_key);
1981 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1982 struct btrfs_dir_item *item,
1983 struct btrfs_key *key)
1985 struct btrfs_disk_key disk_key;
1986 btrfs_dir_item_key(eb, item, &disk_key);
1987 btrfs_disk_key_to_cpu(key, &disk_key);
1990 /* struct btrfs_header */
1991 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1992 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1994 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1995 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1996 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1997 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1998 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1999 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
2001 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2002 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2005 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2007 return (btrfs_header_flags(eb) & flag) == flag;
2010 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2012 u64 flags = btrfs_header_flags(eb);
2013 btrfs_set_header_flags(eb, flags | flag);
2014 return (flags & flag) == flag;
2017 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2019 u64 flags = btrfs_header_flags(eb);
2020 btrfs_set_header_flags(eb, flags & ~flag);
2021 return (flags & flag) == flag;
2024 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2026 u64 flags = btrfs_header_flags(eb);
2027 return flags >> BTRFS_BACKREF_REV_SHIFT;
2030 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2033 u64 flags = btrfs_header_flags(eb);
2034 flags &= ~BTRFS_BACKREF_REV_MASK;
2035 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2036 btrfs_set_header_flags(eb, flags);
2039 static inline unsigned long btrfs_header_fsid(void)
2041 return offsetof(struct btrfs_header, fsid);
2044 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2046 return offsetof(struct btrfs_header, chunk_tree_uuid);
2049 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2051 unsigned long ptr = offsetof(struct btrfs_header, csum);
2055 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2057 return (btrfs_header_level(eb) == 0);
2060 /* struct btrfs_root_item */
2061 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2063 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2064 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2065 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2067 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2069 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2070 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2071 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2072 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2073 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2074 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2075 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2076 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2078 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2080 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2082 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2084 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2086 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2089 static inline struct btrfs_timespec* btrfs_root_ctime(
2090 struct btrfs_root_item *root_item)
2092 unsigned long ptr = (unsigned long)root_item;
2093 ptr += offsetof(struct btrfs_root_item, ctime);
2094 return (struct btrfs_timespec *)ptr;
2097 static inline struct btrfs_timespec* btrfs_root_otime(
2098 struct btrfs_root_item *root_item)
2100 unsigned long ptr = (unsigned long)root_item;
2101 ptr += offsetof(struct btrfs_root_item, otime);
2102 return (struct btrfs_timespec *)ptr;
2105 static inline struct btrfs_timespec* btrfs_root_stime(
2106 struct btrfs_root_item *root_item)
2108 unsigned long ptr = (unsigned long)root_item;
2109 ptr += offsetof(struct btrfs_root_item, stime);
2110 return (struct btrfs_timespec *)ptr;
2113 static inline struct btrfs_timespec* btrfs_root_rtime(
2114 struct btrfs_root_item *root_item)
2116 unsigned long ptr = (unsigned long)root_item;
2117 ptr += offsetof(struct btrfs_root_item, rtime);
2118 return (struct btrfs_timespec *)ptr;
2121 /* struct btrfs_root_backup */
2122 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2124 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2126 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2127 tree_root_level, 8);
2129 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2131 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2132 chunk_root_gen, 64);
2133 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2134 chunk_root_level, 8);
2136 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2138 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2139 extent_root_gen, 64);
2140 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2141 extent_root_level, 8);
2143 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2145 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2147 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2150 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2152 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2154 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2157 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2159 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2161 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2162 csum_root_level, 8);
2163 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2165 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2167 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2170 /* struct btrfs_super_block */
2172 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2173 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2174 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2176 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2177 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2178 struct btrfs_super_block, sys_chunk_array_size, 32);
2179 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2180 struct btrfs_super_block, chunk_root_generation, 64);
2181 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2183 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2185 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2186 chunk_root_level, 8);
2187 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2189 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2190 log_root_transid, 64);
2191 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2193 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2195 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2197 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2199 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2201 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2203 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2204 root_dir_objectid, 64);
2205 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2207 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2209 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2210 compat_ro_flags, 64);
2211 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2212 incompat_flags, 64);
2213 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2215 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2216 cache_generation, 64);
2217 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2218 uuid_tree_generation, 64);
2219 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2221 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2223 int t = btrfs_super_csum_type(s);
2224 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2225 return btrfs_csum_sizes[t];
2228 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2230 return offsetof(struct btrfs_leaf, items);
2233 /* struct btrfs_file_extent_item */
2234 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2235 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2237 static inline unsigned long btrfs_file_extent_inline_start(struct
2238 btrfs_file_extent_item *e)
2240 unsigned long offset = (unsigned long)e;
2241 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2245 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2247 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2250 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2252 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2254 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2256 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2258 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2259 disk_num_bytes, 64);
2260 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2262 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2264 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2266 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2268 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2270 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2272 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2274 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2276 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2278 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2279 other_encoding, 16);
2281 /* btrfs_qgroup_status_item */
2282 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2284 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2286 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2288 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2291 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2292 struct btrfs_qgroup_status_item, version, 64);
2293 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2294 struct btrfs_qgroup_status_item, generation, 64);
2295 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2296 struct btrfs_qgroup_status_item, flags, 64);
2297 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2298 struct btrfs_qgroup_status_item, rescan, 64);
2300 /* btrfs_qgroup_info_item */
2301 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2303 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2305 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2306 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2307 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2309 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2310 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2312 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2313 struct btrfs_qgroup_info_item, generation, 64);
2314 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2315 struct btrfs_qgroup_info_item, referenced, 64);
2316 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2317 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2318 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2319 struct btrfs_qgroup_info_item, exclusive, 64);
2320 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2321 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2323 /* btrfs_qgroup_limit_item */
2324 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2326 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2327 max_referenced, 64);
2328 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2330 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2331 rsv_referenced, 64);
2332 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2335 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2336 struct btrfs_qgroup_limit_item, flags, 64);
2337 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2338 struct btrfs_qgroup_limit_item, max_referenced, 64);
2339 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2340 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2341 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2342 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2343 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2344 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2346 /* btrfs_balance_item */
2347 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2349 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2350 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2352 unsigned long offset = (unsigned long)bi;
2353 struct btrfs_balance_item *p;
2354 p = (struct btrfs_balance_item *)(eb->data + offset);
2358 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2359 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2361 unsigned long offset = (unsigned long)bi;
2362 struct btrfs_balance_item *p;
2363 p = (struct btrfs_balance_item *)(eb->data + offset);
2367 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2368 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2370 unsigned long offset = (unsigned long)bi;
2371 struct btrfs_balance_item *p;
2372 p = (struct btrfs_balance_item *)(eb->data + offset);
2377 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2378 * endiannes conversion, @dsi is offset to eb data
2380 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2381 struct btrfs_dev_stats_item *dsi)
2383 unsigned long offset = (unsigned long)dsi;
2384 struct btrfs_dev_stats_item *p;
2385 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2390 * this returns the number of bytes used by the item on disk, minus the
2391 * size of any extent headers. If a file is compressed on disk, this is
2392 * the compressed size
2394 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2395 struct btrfs_item *e)
2397 unsigned long offset;
2398 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2399 return btrfs_item_size(eb, e) - offset;
2402 /* struct btrfs_ioctl_search_header */
2403 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2405 return get_unaligned_64(&sh->transid);
2408 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2410 return get_unaligned_64(&sh->objectid);
2413 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2415 return get_unaligned_64(&sh->offset);
2418 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2420 return get_unaligned_32(&sh->type);
2423 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2425 return get_unaligned_32(&sh->len);
2428 /* this returns the number of file bytes represented by the inline item.
2429 * If an item is compressed, this is the uncompressed size
2431 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2433 struct btrfs_file_extent_item *fi)
2436 * return the space used on disk if this item isn't
2437 * compressed or encoded
2439 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2440 btrfs_file_extent_encryption(eb, fi) == 0 &&
2441 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2442 return btrfs_file_extent_inline_item_len(eb,
2443 btrfs_item_nr(slot));
2446 /* otherwise use the ram bytes field */
2447 return btrfs_file_extent_ram_bytes(eb, fi);
2450 #define btrfs_fs_incompat(fs_info, opt) \
2451 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2453 static inline int __btrfs_fs_incompat(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_incompat_flags(disk_super) & flag);
2460 #define btrfs_fs_compat_ro(fs_info, opt) \
2461 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2463 static inline int __btrfs_fs_compat_ro(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_compat_ro_flags(disk_super) & flag);
2470 /* helper function to cast into the data area of the leaf. */
2471 #define btrfs_item_ptr(leaf, slot, type) \
2472 ((type *)(btrfs_leaf_data(leaf) + \
2473 btrfs_item_offset_nr(leaf, slot)))
2475 #define btrfs_item_ptr_offset(leaf, slot) \
2476 ((unsigned long)(btrfs_leaf_data(leaf) + \
2477 btrfs_item_offset_nr(leaf, slot)))
2480 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2481 struct btrfs_root *root,
2482 u64 num_bytes, u64 empty_size,
2483 u64 hint_byte, u64 search_end,
2484 struct btrfs_key *ins, bool is_data);
2485 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2486 struct btrfs_root *root);
2487 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2488 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2489 u64 bytenr, u64 num_bytes);
2490 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root);
2492 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2493 btrfs_fs_info *info,
2495 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2496 btrfs_fs_info *info,
2498 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2499 struct btrfs_root *root,
2500 u32 blocksize, u64 root_objectid,
2501 struct btrfs_disk_key *key, int level,
2502 u64 hint, u64 empty_size);
2503 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2504 struct btrfs_root *root,
2505 u64 num_bytes, u64 parent,
2506 u64 root_objectid, u64 ref_generation,
2507 u64 owner, u64 empty_size, u64 hint_byte,
2508 u64 search_end, struct btrfs_key *ins, int data);
2509 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2510 struct btrfs_root *root, u64 bytenr,
2511 u64 offset, int metadata, u64 *refs, u64 *flags);
2512 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2513 struct btrfs_root *root,
2514 u64 bytenr, int level, u64 flags);
2515 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2516 struct extent_buffer *buf, int record_parent);
2517 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2518 struct extent_buffer *buf, int record_parent);
2519 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2520 struct btrfs_root *root,
2521 struct extent_buffer *buf,
2522 u64 parent, int last_ref);
2523 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2524 struct btrfs_root *root,
2525 u64 bytenr, u64 num_bytes, u64 parent,
2526 u64 root_objectid, u64 owner, u64 offset);
2527 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2528 struct btrfs_root *root,
2529 struct extent_io_tree *unpin);
2530 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *root,
2532 u64 bytenr, u64 num_bytes, u64 parent,
2533 u64 root_objectid, u64 ref_generation,
2534 u64 owner_objectid);
2535 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2536 struct btrfs_root *root, u64 bytenr,
2537 u64 orig_parent, u64 parent,
2538 u64 root_objectid, u64 ref_generation,
2539 u64 owner_objectid);
2540 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2541 struct btrfs_root *root);
2542 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2543 int btrfs_read_block_groups(struct btrfs_root *root);
2544 struct btrfs_block_group_cache *
2545 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2546 u64 chunk_offset, u64 size);
2547 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2548 struct btrfs_fs_info *fs_info, u64 bytes_used,
2549 u64 type, u64 chunk_offset, u64 size);
2550 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2551 struct btrfs_fs_info *fs_info);
2552 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2553 int alloc, int mark_free);
2554 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2555 struct btrfs_root *root, u64 objectid,
2556 struct btrfs_inode_item *inode,
2557 u64 file_pos, u64 disk_bytenr,
2559 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2560 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2561 void free_excluded_extents(struct btrfs_root *root,
2562 struct btrfs_block_group_cache *cache);
2563 int exclude_super_stripes(struct btrfs_root *root,
2564 struct btrfs_block_group_cache *cache);
2565 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2566 struct btrfs_fs_info *info, u64 start, u64 end);
2567 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2570 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2571 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2572 int level, int slot);
2573 enum btrfs_tree_block_status
2574 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2575 struct extent_buffer *buf);
2576 enum btrfs_tree_block_status
2577 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2578 struct extent_buffer *buf);
2579 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2580 int level, int slot, u64 objectid);
2581 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2582 struct extent_buffer *parent, int slot);
2583 int btrfs_previous_item(struct btrfs_root *root,
2584 struct btrfs_path *path, u64 min_objectid,
2586 int btrfs_previous_extent_item(struct btrfs_root *root,
2587 struct btrfs_path *path, u64 min_objectid);
2588 int btrfs_next_extent_item(struct btrfs_root *root,
2589 struct btrfs_path *path, u64 max_objectid);
2590 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2591 struct btrfs_root *root, struct extent_buffer *buf,
2592 struct extent_buffer *parent, int parent_slot,
2593 struct extent_buffer **cow_ret);
2594 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2595 struct btrfs_root *root,
2596 struct extent_buffer *buf,
2597 struct extent_buffer *parent, int parent_slot,
2598 struct extent_buffer **cow_ret,
2599 u64 search_start, u64 empty_size);
2600 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct extent_buffer *buf,
2603 struct extent_buffer **cow_ret, u64 new_root_objectid);
2604 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2606 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2607 u32 new_size, int from_end);
2608 int btrfs_split_item(struct btrfs_trans_handle *trans,
2609 struct btrfs_root *root,
2610 struct btrfs_path *path,
2611 struct btrfs_key *new_key,
2612 unsigned long split_offset);
2613 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2614 *root, struct btrfs_key *key, struct btrfs_path *p, int
2616 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2617 u64 iobjectid, u64 ioff, u8 key_type,
2618 struct btrfs_key *found_key);
2619 void btrfs_release_path(struct btrfs_path *p);
2620 void add_root_to_dirty_list(struct btrfs_root *root);
2621 struct btrfs_path *btrfs_alloc_path(void);
2622 void btrfs_free_path(struct btrfs_path *p);
2623 void btrfs_init_path(struct btrfs_path *p);
2624 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2625 struct btrfs_path *path, int slot, int nr);
2627 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2628 struct btrfs_root *root,
2629 struct btrfs_path *path)
2631 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2634 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2635 *root, struct btrfs_key *key, void *data, u32 data_size);
2636 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2637 struct btrfs_root *root,
2638 struct btrfs_path *path,
2639 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2641 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2642 struct btrfs_root *root,
2643 struct btrfs_path *path,
2644 struct btrfs_key *key,
2647 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2650 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2651 static inline int btrfs_next_item(struct btrfs_root *root,
2652 struct btrfs_path *p)
2655 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2656 return btrfs_next_leaf(root, p);
2660 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2661 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2662 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2663 struct btrfs_disk_key *key, int level);
2664 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2665 struct btrfs_key *new_key);
2666 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2667 struct btrfs_path *path,
2668 struct btrfs_key *new_key);
2671 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2672 struct btrfs_root *tree_root,
2673 u64 root_id, u8 type, u64 ref_id,
2674 u64 dirid, u64 sequence,
2675 const char *name, int name_len);
2676 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2677 *root, struct btrfs_key *key, struct btrfs_root_item
2679 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2680 struct btrfs_key *key);
2681 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2682 *root, struct btrfs_key *key, struct btrfs_root_item
2684 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2685 btrfs_root_item *item, struct btrfs_key *key);
2687 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2688 *root, const char *name, int name_len, u64 dir,
2689 struct btrfs_key *location, u8 type, u64 index);
2690 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2691 struct btrfs_root *root,
2692 struct btrfs_path *path, u64 dir,
2693 const char *name, int name_len,
2695 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2696 struct btrfs_root *root,
2697 struct btrfs_path *path, u64 dir,
2698 const char *name, int name_len,
2699 u64 index, int mod);
2700 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2701 struct btrfs_root *root,
2702 struct btrfs_path *path,
2703 struct btrfs_dir_item *di);
2704 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *root, const char *name,
2706 u16 name_len, const void *data, u16 data_len,
2709 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *fs_root,
2711 u64 dirid, u64 *objectid);
2714 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2715 struct btrfs_root *root,
2716 const char *name, int name_len,
2717 u64 inode_objectid, u64 ref_objectid, u64 index);
2718 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2719 *root, u64 objectid, struct btrfs_inode_item
2721 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2722 *root, struct btrfs_path *path,
2723 struct btrfs_key *location, int mod);
2724 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2725 *trans, struct btrfs_path *path, struct btrfs_root *root,
2726 u64 ino, u64 parent_ino, u64 index, const char *name,
2727 int namelen, int ins_len);
2728 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2729 struct btrfs_root *root,
2730 const char *name, int name_len,
2731 u64 inode_objectid, u64 ref_objectid,
2733 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2734 struct btrfs_root *root,
2735 const char *name, int name_len,
2736 u64 inode_objectid, u64 ref_objectid, u64 index);
2737 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2738 struct btrfs_root *root, struct btrfs_path *path,
2739 const char *name, int namelen, u64 ino, u64 parent_ino,
2741 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, const char *name, int name_len,
2743 u64 ino, u64 parent_ino, u64 *index);
2746 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2747 struct btrfs_root *root, u64 bytenr, u64 len);
2748 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2749 struct btrfs_root *root,
2750 u64 objectid, u64 pos, u64 offset,
2753 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2754 struct btrfs_root *root, u64 objectid,
2755 u64 offset, const char *buffer, size_t size);
2756 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2757 struct btrfs_root *root, u64 alloc_end,
2758 u64 bytenr, char *data, size_t len);
2759 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2760 struct btrfs_root *root, struct btrfs_path *path,
2764 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2765 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2768 static inline int is_fstree(u64 rootid)
2770 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2771 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2777 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2778 u64 dir, u64 index);
2779 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2781 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2782 struct btrfs_root *root, u64 ino, u64 flags);
2783 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2784 u64 ino, u64 parent_ino, char *name, int namelen,
2785 u8 type, u64 *index, int add_backref, int ignore_existed);
2786 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2787 u64 ino, u64 parent_ino, u64 index, const char *name,
2788 int namelen, int add_orphan);
2789 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2790 struct btrfs_root *root, struct btrfs_path *path,
2792 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2793 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2794 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2795 u64 root_objectid, bool convert);
2798 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2799 struct btrfs_root *root,
2800 struct btrfs_path *path,
2801 u64 ino, u64 offset, u64 len, int ins_len);
2802 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2803 struct btrfs_root *root,
2804 u64 ino, u64 offset, u64 len);
2805 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,