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))
364 * this is a very generous portion of the super block, giving us
365 * room to translate 14 chunks with 3 stripes each.
367 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
368 #define BTRFS_LABEL_SIZE 256
371 * just in case we somehow lose the roots and are not able to mount,
372 * we store an array of the roots from previous transactions
375 #define BTRFS_NUM_BACKUP_ROOTS 4
376 struct btrfs_root_backup {
378 __le64 tree_root_gen;
381 __le64 chunk_root_gen;
384 __le64 extent_root_gen;
393 __le64 csum_root_gen;
403 u8 extent_root_level;
407 /* future and to align */
409 } __attribute__ ((__packed__));
412 * the super block basically lists the main trees of the FS
413 * it currently lacks any block count etc etc
415 struct btrfs_super_block {
416 u8 csum[BTRFS_CSUM_SIZE];
417 /* the first 3 fields must match struct btrfs_header */
418 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
419 __le64 bytenr; /* this block number */
422 /* allowed to be different from the btrfs_header from here own down */
429 /* this will help find the new super based on the log root */
430 __le64 log_root_transid;
433 __le64 root_dir_objectid;
437 /* Unused and must be equal to nodesize */
438 __le32 __unused_leafsize;
440 __le32 sys_chunk_array_size;
441 __le64 chunk_root_generation;
443 __le64 compat_ro_flags;
444 __le64 incompat_flags;
449 struct btrfs_dev_item dev_item;
451 char label[BTRFS_LABEL_SIZE];
453 __le64 cache_generation;
454 __le64 uuid_tree_generation;
456 /* future expansion */
458 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
459 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
460 } __attribute__ ((__packed__));
463 * Compat flags that we support. If any incompat flags are set other than the
464 * ones specified below then we will fail to mount
466 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE (1ULL << 0)
468 * Older kernels on big-endian systems produced broken free space tree bitmaps,
469 * and btrfs-progs also used to corrupt the free space tree. If this bit is
470 * clear, then the free space tree cannot be trusted. btrfs-progs can also
471 * intentionally clear this bit to ask the kernel to rebuild the free space
474 #define BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID (1ULL << 1)
476 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
477 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
478 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
479 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
480 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD (1ULL << 4)
483 * older kernels tried to do bigger metadata blocks, but the
484 * code was pretty buggy. Lets not let them try anymore.
486 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
487 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
488 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
489 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
490 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
492 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
495 * The FREE_SPACE_TREE and FREE_SPACE_TREE_VALID compat_ro bits must not be
496 * added here until read-write support for the free space tree is implemented in
499 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
501 #define BTRFS_FEATURE_INCOMPAT_SUPP \
502 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
503 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
504 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
505 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \
506 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
507 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
508 BTRFS_FEATURE_INCOMPAT_RAID56 | \
509 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
510 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
511 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
514 * A leaf is full of items. offset and size tell us where to find
515 * the item in the leaf (relative to the start of the data area)
518 struct btrfs_disk_key key;
521 } __attribute__ ((__packed__));
524 * leaves have an item area and a data area:
525 * [item0, item1....itemN] [free space] [dataN...data1, data0]
527 * The data is separate from the items to get the keys closer together
531 struct btrfs_header header;
532 struct btrfs_item items[];
533 } __attribute__ ((__packed__));
536 * all non-leaf blocks are nodes, they hold only keys and pointers to
539 struct btrfs_key_ptr {
540 struct btrfs_disk_key key;
543 } __attribute__ ((__packed__));
546 struct btrfs_header header;
547 struct btrfs_key_ptr ptrs[];
548 } __attribute__ ((__packed__));
551 * btrfs_paths remember the path taken from the root down to the leaf.
552 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
553 * to any other levels that are present.
555 * The slots array records the index of the item or block pointer
556 * used while walking the tree.
560 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
561 int slots[BTRFS_MAX_LEVEL];
563 /* The kernel locking sheme is not done in userspace. */
564 int locks[BTRFS_MAX_LEVEL];
567 /* keep some upper locks as we walk down */
571 * set by btrfs_split_item, tells search_slot to keep all locks
572 * and to force calls to keep space in the nodes
579 * items in the extent btree are used to record the objectid of the
580 * owner of the block and the number of references
583 struct btrfs_extent_item {
587 } __attribute__ ((__packed__));
589 struct btrfs_extent_item_v0 {
591 } __attribute__ ((__packed__));
593 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) \
594 ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
595 sizeof(struct btrfs_item))
596 #define BTRFS_MAX_EXTENT_SIZE SZ_128M
598 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
599 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
601 /* following flags only apply to tree blocks */
603 /* use full backrefs for extent pointers in the block*/
604 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
606 struct btrfs_tree_block_info {
607 struct btrfs_disk_key key;
609 } __attribute__ ((__packed__));
611 struct btrfs_extent_data_ref {
616 } __attribute__ ((__packed__));
618 struct btrfs_shared_data_ref {
620 } __attribute__ ((__packed__));
622 struct btrfs_extent_inline_ref {
625 } __attribute__ ((__packed__));
627 struct btrfs_extent_ref_v0 {
632 } __attribute__ ((__packed__));
634 /* dev extents record free space on individual devices. The owner
635 * field points back to the chunk allocation mapping tree that allocated
636 * the extent. The chunk tree uuid field is a way to double check the owner
638 struct btrfs_dev_extent {
640 __le64 chunk_objectid;
643 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
644 } __attribute__ ((__packed__));
646 struct btrfs_inode_ref {
650 } __attribute__ ((__packed__));
652 struct btrfs_inode_extref {
653 __le64 parent_objectid;
656 __u8 name[0]; /* name goes here */
657 } __attribute__ ((__packed__));
659 struct btrfs_timespec {
662 } __attribute__ ((__packed__));
665 BTRFS_COMPRESS_NONE = 0,
666 BTRFS_COMPRESS_ZLIB = 1,
667 BTRFS_COMPRESS_LZO = 2,
668 BTRFS_COMPRESS_ZSTD = 3,
669 BTRFS_COMPRESS_TYPES = 3,
670 BTRFS_COMPRESS_LAST = 4,
671 } btrfs_compression_type;
673 /* we don't understand any encryption methods right now */
675 BTRFS_ENCRYPTION_NONE = 0,
676 BTRFS_ENCRYPTION_LAST = 1,
677 } btrfs_encryption_type;
679 enum btrfs_tree_block_status {
680 BTRFS_TREE_BLOCK_CLEAN,
681 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
682 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
683 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
684 BTRFS_TREE_BLOCK_INVALID_LEVEL,
685 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
686 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
689 struct btrfs_inode_item {
690 /* nfs style generation number */
692 /* transid that last touched this inode */
704 /* modification sequence number for NFS */
708 * a little future expansion, for more than this we can
709 * just grow the inode item and version it
712 struct btrfs_timespec atime;
713 struct btrfs_timespec ctime;
714 struct btrfs_timespec mtime;
715 struct btrfs_timespec otime;
716 } __attribute__ ((__packed__));
718 struct btrfs_dir_log_item {
720 } __attribute__ ((__packed__));
722 struct btrfs_dir_item {
723 struct btrfs_disk_key location;
728 } __attribute__ ((__packed__));
730 struct btrfs_root_item_v0 {
731 struct btrfs_inode_item inode;
737 __le64 last_snapshot;
740 struct btrfs_disk_key drop_progress;
743 } __attribute__ ((__packed__));
745 struct btrfs_root_item {
746 struct btrfs_inode_item inode;
752 __le64 last_snapshot;
755 struct btrfs_disk_key drop_progress;
760 * The following fields appear after subvol_uuids+subvol_times
765 * This generation number is used to test if the new fields are valid
766 * and up to date while reading the root item. Every time the root item
767 * is written out, the "generation" field is copied into this field. If
768 * anyone ever mounted the fs with an older kernel, we will have
769 * mismatching generation values here and thus must invalidate the
770 * new fields. See btrfs_update_root and btrfs_find_last_root for
772 * the offset of generation_v2 is also used as the start for the memset
773 * when invalidating the fields.
775 __le64 generation_v2;
776 u8 uuid[BTRFS_UUID_SIZE];
777 u8 parent_uuid[BTRFS_UUID_SIZE];
778 u8 received_uuid[BTRFS_UUID_SIZE];
779 __le64 ctransid; /* updated when an inode changes */
780 __le64 otransid; /* trans when created */
781 __le64 stransid; /* trans when sent. non-zero for received subvol */
782 __le64 rtransid; /* trans when received. non-zero for received subvol */
783 struct btrfs_timespec ctime;
784 struct btrfs_timespec otime;
785 struct btrfs_timespec stime;
786 struct btrfs_timespec rtime;
787 __le64 reserved[8]; /* for future */
788 } __attribute__ ((__packed__));
791 * this is used for both forward and backward root refs
793 struct btrfs_root_ref {
797 } __attribute__ ((__packed__));
799 struct btrfs_disk_balance_args {
801 * profiles to operate on, single is denoted by
802 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
808 * BTRFS_BALANCE_ARGS_USAGE with a single value means '0..N'
809 * BTRFS_BALANCE_ARGS_USAGE_RANGE - range syntax, min..max
822 /* devid subset filter [pstart..pend) */
826 /* btrfs virtual address space subset filter [vstart..vend) */
831 * profile to convert to, single is denoted by
832 * BTRFS_AVAIL_ALLOC_BIT_SINGLE
836 /* BTRFS_BALANCE_ARGS_* */
840 * BTRFS_BALANCE_ARGS_LIMIT with value 'limit'
841 * BTRFS_BALANCE_ARGS_LIMIT_RANGE - the extend version can use minimum
853 * Process chunks that cross stripes_min..stripes_max devices,
854 * BTRFS_BALANCE_ARGS_STRIPES_RANGE
860 } __attribute__ ((__packed__));
863 * store balance parameters to disk so that balance can be properly
864 * resumed after crash or unmount
866 struct btrfs_balance_item {
867 /* BTRFS_BALANCE_* */
870 struct btrfs_disk_balance_args data;
871 struct btrfs_disk_balance_args meta;
872 struct btrfs_disk_balance_args sys;
875 } __attribute__ ((__packed__));
877 #define BTRFS_FILE_EXTENT_INLINE 0
878 #define BTRFS_FILE_EXTENT_REG 1
879 #define BTRFS_FILE_EXTENT_PREALLOC 2
881 struct btrfs_file_extent_item {
883 * transaction id that created this extent
887 * max number of bytes to hold this extent in ram
888 * when we split a compressed extent we can't know how big
889 * each of the resulting pieces will be. So, this is
890 * an upper limit on the size of the extent in ram instead of
896 * 32 bits for the various ways we might encode the data,
897 * including compression and encryption. If any of these
898 * are set to something a given disk format doesn't understand
899 * it is treated like an incompat flag for reading and writing,
904 __le16 other_encoding; /* spare for later use */
906 /* are we inline data or a real extent? */
910 * disk space consumed by the extent, checksum blocks are included
914 __le64 disk_num_bytes;
916 * the logical offset in file blocks (no csums)
917 * this extent record is for. This allows a file extent to point
918 * into the middle of an existing extent on disk, sharing it
919 * between two snapshots (useful if some bytes in the middle of the
920 * extent have changed
924 * the logical number of file blocks (no csums included)
928 } __attribute__ ((__packed__));
930 struct btrfs_dev_stats_item {
932 * grow this item struct at the end for future enhancements and keep
933 * the existing values unchanged
935 __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
936 } __attribute__ ((__packed__));
938 struct btrfs_csum_item {
940 } __attribute__ ((__packed__));
943 * We don't want to overwrite 1M at the beginning of device, even though
944 * there is our 1st superblock at 64k. Some possible reasons:
945 * - the first 64k blank is useful for some boot loader/manager
946 * - the first 1M could be scratched by buggy partitioner or somesuch
948 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)SZ_1M)
950 /* tag for the radix tree of block groups in ram */
951 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
952 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
953 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
954 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
955 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
956 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
957 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
958 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
959 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
960 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
961 #define BTRFS_NR_RAID_TYPES 7
963 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
964 BTRFS_BLOCK_GROUP_SYSTEM | \
965 BTRFS_BLOCK_GROUP_METADATA)
967 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
968 BTRFS_BLOCK_GROUP_RAID1 | \
969 BTRFS_BLOCK_GROUP_RAID5 | \
970 BTRFS_BLOCK_GROUP_RAID6 | \
971 BTRFS_BLOCK_GROUP_DUP | \
972 BTRFS_BLOCK_GROUP_RAID10)
974 /* used in struct btrfs_balance_args fields */
975 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
978 * GLOBAL_RSV does not exist as a on-disk block group type and is used
979 * internally for exporting info about global block reserve from space infos
981 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
983 #define BTRFS_QGROUP_LEVEL_SHIFT 48
985 static inline u64 btrfs_qgroup_level(u64 qgroupid)
987 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
990 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
992 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
995 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
996 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
997 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
999 struct btrfs_qgroup_status_item {
1003 __le64 rescan; /* progress during scanning */
1004 } __attribute__ ((__packed__));
1006 struct btrfs_block_group_item {
1008 __le64 chunk_objectid;
1010 } __attribute__ ((__packed__));
1012 struct btrfs_free_space_info {
1013 __le32 extent_count;
1015 } __attribute__ ((__packed__));
1017 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
1019 struct btrfs_qgroup_info_item {
1022 __le64 referenced_compressed;
1024 __le64 exclusive_compressed;
1025 } __attribute__ ((__packed__));
1027 /* flags definition for qgroup limits */
1028 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
1029 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
1030 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
1031 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
1032 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
1033 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
1035 struct btrfs_qgroup_limit_item {
1037 __le64 max_referenced;
1038 __le64 max_exclusive;
1039 __le64 rsv_referenced;
1040 __le64 rsv_exclusive;
1041 } __attribute__ ((__packed__));
1043 struct btrfs_space_info {
1049 struct list_head list;
1052 struct btrfs_block_group_cache {
1053 struct cache_extent cache;
1054 struct btrfs_key key;
1055 struct btrfs_block_group_item item;
1056 struct btrfs_space_info *space_info;
1057 struct btrfs_free_space_ctl *free_space_ctl;
1065 struct btrfs_device;
1066 struct btrfs_fs_devices;
1067 struct btrfs_fs_info {
1068 u8 fsid[BTRFS_FSID_SIZE];
1070 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
1071 u8 *new_chunk_tree_uuid;
1072 struct btrfs_root *fs_root;
1073 struct btrfs_root *extent_root;
1074 struct btrfs_root *tree_root;
1075 struct btrfs_root *chunk_root;
1076 struct btrfs_root *dev_root;
1077 struct btrfs_root *csum_root;
1078 struct btrfs_root *quota_root;
1079 struct btrfs_root *free_space_root;
1081 struct rb_root fs_root_tree;
1083 /* the log root tree is a directory of all the other log roots */
1084 struct btrfs_root *log_root_tree;
1086 struct extent_io_tree extent_cache;
1087 struct extent_io_tree free_space_cache;
1088 struct extent_io_tree block_group_cache;
1089 struct extent_io_tree pinned_extents;
1090 struct extent_io_tree pending_del;
1091 struct extent_io_tree extent_ins;
1092 struct extent_io_tree *excluded_extents;
1094 /* logical->physical extent mapping */
1095 struct btrfs_mapping_tree mapping_tree;
1098 u64 last_trans_committed;
1100 u64 avail_data_alloc_bits;
1101 u64 avail_metadata_alloc_bits;
1102 u64 avail_system_alloc_bits;
1103 u64 data_alloc_profile;
1104 u64 metadata_alloc_profile;
1105 u64 system_alloc_profile;
1108 struct btrfs_trans_handle *running_transaction;
1109 struct btrfs_super_block *super_copy;
1110 struct mutex fs_mutex;
1115 struct list_head dirty_cowonly_roots;
1116 struct list_head recow_ebs;
1118 struct btrfs_fs_devices *fs_devices;
1119 struct list_head space_info;
1121 unsigned int system_allocs:1;
1122 unsigned int readonly:1;
1123 unsigned int on_restoring:1;
1124 unsigned int is_chunk_recover:1;
1125 unsigned int quota_enabled:1;
1126 unsigned int suppress_check_block_errors:1;
1127 unsigned int ignore_fsid_mismatch:1;
1128 unsigned int ignore_chunk_tree_error:1;
1129 unsigned int avoid_meta_chunk_alloc:1;
1130 unsigned int avoid_sys_chunk_alloc:1;
1131 unsigned int finalize_on_close:1;
1133 int transaction_aborted;
1135 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1136 struct btrfs_root *root,
1137 u64 bytenr, u64 num_bytes, u64 parent,
1138 u64 root_objectid, u64 owner, u64 offset,
1140 struct cache_tree *fsck_extent_cache;
1141 struct cache_tree *corrupt_blocks;
1143 /* Cached block sizes */
1150 * in ram representation of the tree. extent_root is used for all allocations
1151 * and for the extent tree extent_root root.
1154 struct extent_buffer *node;
1155 struct extent_buffer *commit_root;
1156 struct btrfs_root_item root_item;
1157 struct btrfs_key root_key;
1158 struct btrfs_fs_info *fs_info;
1167 u64 last_inode_alloc;
1170 * Record orphan data extent ref
1172 * TODO: Don't restore things in btrfs_root.
1173 * Directly record it into inode_record, which needs a lot of
1174 * infrastructure change to allow cooperation between extent
1177 struct list_head orphan_data_extents;
1179 /* the dirty list is only used by non-reference counted roots */
1180 struct list_head dirty_list;
1181 struct rb_node rb_node;
1184 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info)
1186 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item);
1189 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info)
1191 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr);
1194 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \
1195 (offsetof(struct btrfs_file_extent_item, disk_bytenr))
1196 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info)
1198 return BTRFS_MAX_ITEM_SIZE(info) -
1199 BTRFS_FILE_EXTENT_INLINE_DATA_START;
1202 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info)
1204 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item);
1208 * inode items have the data typically returned from stat and store other
1209 * info about object characteristics. There is one for every file and dir in
1212 #define BTRFS_INODE_ITEM_KEY 1
1213 #define BTRFS_INODE_REF_KEY 12
1214 #define BTRFS_INODE_EXTREF_KEY 13
1215 #define BTRFS_XATTR_ITEM_KEY 24
1216 #define BTRFS_ORPHAN_ITEM_KEY 48
1218 #define BTRFS_DIR_LOG_ITEM_KEY 60
1219 #define BTRFS_DIR_LOG_INDEX_KEY 72
1221 * dir items are the name -> inode pointers in a directory. There is one
1222 * for every name in a directory.
1224 #define BTRFS_DIR_ITEM_KEY 84
1225 #define BTRFS_DIR_INDEX_KEY 96
1228 * extent data is for file data
1230 #define BTRFS_EXTENT_DATA_KEY 108
1233 * csum items have the checksums for data in the extents
1235 #define BTRFS_CSUM_ITEM_KEY 120
1237 * extent csums are stored in a separate tree and hold csums for
1238 * an entire extent on disk.
1240 #define BTRFS_EXTENT_CSUM_KEY 128
1243 * root items point to tree roots. There are typically in the root
1244 * tree used by the super block to find all the other trees
1246 #define BTRFS_ROOT_ITEM_KEY 132
1249 * root backrefs tie subvols and snapshots to the directory entries that
1252 #define BTRFS_ROOT_BACKREF_KEY 144
1255 * root refs make a fast index for listing all of the snapshots and
1256 * subvolumes referenced by a given root. They point directly to the
1257 * directory item in the root that references the subvol
1259 #define BTRFS_ROOT_REF_KEY 156
1262 * extent items are in the extent map tree. These record which blocks
1263 * are used, and how many references there are to each block
1265 #define BTRFS_EXTENT_ITEM_KEY 168
1268 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1269 * the length, so we save the level in key->offset instead of the length.
1271 #define BTRFS_METADATA_ITEM_KEY 169
1273 #define BTRFS_TREE_BLOCK_REF_KEY 176
1275 #define BTRFS_EXTENT_DATA_REF_KEY 178
1277 /* old style extent backrefs */
1278 #define BTRFS_EXTENT_REF_V0_KEY 180
1280 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1282 #define BTRFS_SHARED_DATA_REF_KEY 184
1286 * block groups give us hints into the extent allocation trees. Which
1287 * blocks are free etc etc
1289 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1292 * Every block group is represented in the free space tree by a free space info
1293 * item, which stores some accounting information. It is keyed on
1294 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1296 #define BTRFS_FREE_SPACE_INFO_KEY 198
1299 * A free space extent tracks an extent of space that is free in a block group.
1300 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1302 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1305 * When a block group becomes very fragmented, we convert it to use bitmaps
1306 * instead of extents. A free space bitmap is keyed on
1307 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1308 * (length / sectorsize) bits.
1310 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1312 #define BTRFS_DEV_EXTENT_KEY 204
1313 #define BTRFS_DEV_ITEM_KEY 216
1314 #define BTRFS_CHUNK_ITEM_KEY 228
1316 #define BTRFS_BALANCE_ITEM_KEY 248
1321 #define BTRFS_QGROUP_STATUS_KEY 240
1322 #define BTRFS_QGROUP_INFO_KEY 242
1323 #define BTRFS_QGROUP_LIMIT_KEY 244
1324 #define BTRFS_QGROUP_RELATION_KEY 246
1327 * Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
1329 #define BTRFS_BALANCE_ITEM_KEY 248
1332 * The key type for tree items that are stored persistently, but do not need to
1333 * exist for extended period of time. The items can exist in any tree.
1335 * [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
1339 * - balance status item
1340 * (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
1342 #define BTRFS_TEMPORARY_ITEM_KEY 248
1345 * Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
1347 #define BTRFS_DEV_STATS_KEY 249
1350 * The key type for tree items that are stored persistently and usually exist
1351 * for a long period, eg. filesystem lifetime. The item kinds can be status
1352 * information, stats or preference values. The item can exist in any tree.
1354 * [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
1358 * - device statistics, store IO stats in the device tree, one key for all
1360 * (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
1362 #define BTRFS_PERSISTENT_ITEM_KEY 249
1365 * Persistently stores the device replace state in the device tree.
1366 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1368 #define BTRFS_DEV_REPLACE_KEY 250
1371 * Stores items that allow to quickly map UUIDs to something else.
1372 * These items are part of the filesystem UUID tree.
1373 * The key is built like this:
1374 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1376 #if BTRFS_UUID_SIZE != 16
1377 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1379 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1380 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1381 * received subvols */
1384 * string items are for debugging. They just store a short string of
1387 #define BTRFS_STRING_ITEM_KEY 253
1391 #define BTRFS_INODE_NODATASUM (1 << 0)
1392 #define BTRFS_INODE_NODATACOW (1 << 1)
1393 #define BTRFS_INODE_READONLY (1 << 2)
1394 #define BTRFS_INODE_NOCOMPRESS (1 << 3)
1395 #define BTRFS_INODE_PREALLOC (1 << 4)
1396 #define BTRFS_INODE_SYNC (1 << 5)
1397 #define BTRFS_INODE_IMMUTABLE (1 << 6)
1398 #define BTRFS_INODE_APPEND (1 << 7)
1399 #define BTRFS_INODE_NODUMP (1 << 8)
1400 #define BTRFS_INODE_NOATIME (1 << 9)
1401 #define BTRFS_INODE_DIRSYNC (1 << 10)
1402 #define BTRFS_INODE_COMPRESS (1 << 11)
1404 #define read_eb_member(eb, ptr, type, member, result) ( \
1405 read_extent_buffer(eb, (char *)(result), \
1406 ((unsigned long)(ptr)) + \
1407 offsetof(type, member), \
1408 sizeof(((type *)0)->member)))
1410 #define write_eb_member(eb, ptr, type, member, result) ( \
1411 write_extent_buffer(eb, (char *)(result), \
1412 ((unsigned long)(ptr)) + \
1413 offsetof(type, member), \
1414 sizeof(((type *)0)->member)))
1416 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1417 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1419 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1420 return le##bits##_to_cpu(h->member); \
1422 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1425 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1426 h->member = cpu_to_le##bits(val); \
1429 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1430 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1433 unsigned long offset = (unsigned long)s; \
1434 const type *p = (type *) (eb->data + offset); \
1435 return get_unaligned_le##bits(&p->member); \
1437 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1438 type *s, u##bits val) \
1440 unsigned long offset = (unsigned long)s; \
1441 type *p = (type *) (eb->data + offset); \
1442 put_unaligned_le##bits(val, &p->member); \
1445 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1446 static inline u##bits btrfs_##name(const type *s) \
1448 return le##bits##_to_cpu(s->member); \
1450 static inline void btrfs_set_##name(type *s, u##bits val) \
1452 s->member = cpu_to_le##bits(val); \
1455 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1456 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1457 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1458 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1459 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1460 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1462 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1463 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1464 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1465 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1466 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1467 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1472 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1474 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1476 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1478 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1480 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1481 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1483 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1485 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1487 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1490 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1492 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1495 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1497 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1500 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1501 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1502 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1503 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1504 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1505 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1506 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1507 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1508 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1509 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1510 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1512 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1514 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1517 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1518 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1519 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1521 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1523 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1525 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1528 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1530 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1532 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1533 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1535 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1538 unsigned long offset = (unsigned long)c;
1539 offset += offsetof(struct btrfs_chunk, stripe);
1540 offset += nr * sizeof(struct btrfs_stripe);
1541 return (struct btrfs_stripe *)offset;
1544 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1546 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1549 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1550 struct btrfs_chunk *c, int nr)
1552 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1555 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1556 struct btrfs_chunk *c, int nr,
1559 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1562 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1563 struct btrfs_chunk *c, int nr)
1565 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1568 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1569 struct btrfs_chunk *c, int nr,
1572 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1575 /* struct btrfs_block_group_item */
1576 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1578 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1580 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1581 struct btrfs_block_group_item, chunk_objectid, 64);
1583 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1584 struct btrfs_block_group_item, chunk_objectid, 64);
1585 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1586 struct btrfs_block_group_item, flags, 64);
1587 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1588 struct btrfs_block_group_item, flags, 64);
1590 /* struct btrfs_free_space_info */
1591 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1593 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1595 /* struct btrfs_inode_ref */
1596 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1597 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1598 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1600 /* struct btrfs_inode_extref */
1601 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1602 parent_objectid, 64);
1603 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1605 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1607 /* struct btrfs_inode_item */
1608 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1609 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1610 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1611 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1612 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1613 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1614 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1615 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1616 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1617 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1618 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1619 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1622 struct btrfs_inode_item, generation, 64);
1623 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1624 struct btrfs_inode_item, sequence, 64);
1625 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1626 struct btrfs_inode_item, transid, 64);
1627 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1628 struct btrfs_inode_item, size, 64);
1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1630 struct btrfs_inode_item, nbytes, 64);
1631 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1632 struct btrfs_inode_item, block_group, 64);
1633 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1634 struct btrfs_inode_item, nlink, 32);
1635 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1636 struct btrfs_inode_item, uid, 32);
1637 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1638 struct btrfs_inode_item, gid, 32);
1639 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1640 struct btrfs_inode_item, mode, 32);
1641 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1642 struct btrfs_inode_item, rdev, 64);
1643 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1644 struct btrfs_inode_item, flags, 64);
1646 static inline struct btrfs_timespec *
1647 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1649 unsigned long ptr = (unsigned long)inode_item;
1650 ptr += offsetof(struct btrfs_inode_item, atime);
1651 return (struct btrfs_timespec *)ptr;
1654 static inline struct btrfs_timespec *
1655 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1657 unsigned long ptr = (unsigned long)inode_item;
1658 ptr += offsetof(struct btrfs_inode_item, mtime);
1659 return (struct btrfs_timespec *)ptr;
1662 static inline struct btrfs_timespec *
1663 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1665 unsigned long ptr = (unsigned long)inode_item;
1666 ptr += offsetof(struct btrfs_inode_item, ctime);
1667 return (struct btrfs_timespec *)ptr;
1670 static inline struct btrfs_timespec *
1671 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1673 unsigned long ptr = (unsigned long)inode_item;
1674 ptr += offsetof(struct btrfs_inode_item, otime);
1675 return (struct btrfs_timespec *)ptr;
1678 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1679 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1680 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1682 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1685 /* struct btrfs_dev_extent */
1686 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1688 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1689 chunk_objectid, 64);
1690 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1692 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1697 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1699 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1700 return (u8 *)((unsigned long)dev + ptr);
1704 /* struct btrfs_extent_item */
1705 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1706 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1707 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1709 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1710 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1712 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1714 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1716 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1717 struct btrfs_tree_block_info *item,
1718 struct btrfs_disk_key *key)
1720 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1723 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1724 struct btrfs_tree_block_info *item,
1725 struct btrfs_disk_key *key)
1727 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1730 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1732 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1734 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1736 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1739 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1742 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1744 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1746 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1747 struct btrfs_extent_inline_ref, type, 8);
1748 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1749 struct btrfs_extent_inline_ref, offset, 64);
1751 static inline u32 btrfs_extent_inline_ref_size(int type)
1753 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1754 type == BTRFS_SHARED_BLOCK_REF_KEY)
1755 return sizeof(struct btrfs_extent_inline_ref);
1756 if (type == BTRFS_SHARED_DATA_REF_KEY)
1757 return sizeof(struct btrfs_shared_data_ref) +
1758 sizeof(struct btrfs_extent_inline_ref);
1759 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1760 return sizeof(struct btrfs_extent_data_ref) +
1761 offsetof(struct btrfs_extent_inline_ref, offset);
1766 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1767 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1769 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1770 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1772 /* struct btrfs_node */
1773 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1774 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1776 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1779 ptr = offsetof(struct btrfs_node, ptrs) +
1780 sizeof(struct btrfs_key_ptr) * nr;
1781 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1784 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1788 ptr = offsetof(struct btrfs_node, ptrs) +
1789 sizeof(struct btrfs_key_ptr) * nr;
1790 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1793 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1796 ptr = offsetof(struct btrfs_node, ptrs) +
1797 sizeof(struct btrfs_key_ptr) * nr;
1798 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1801 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1805 ptr = offsetof(struct btrfs_node, ptrs) +
1806 sizeof(struct btrfs_key_ptr) * nr;
1807 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1810 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1812 return offsetof(struct btrfs_node, ptrs) +
1813 sizeof(struct btrfs_key_ptr) * nr;
1816 static inline void btrfs_node_key(struct extent_buffer *eb,
1817 struct btrfs_disk_key *disk_key, int nr)
1820 ptr = btrfs_node_key_ptr_offset(nr);
1821 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1822 struct btrfs_key_ptr, key, disk_key);
1825 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1826 struct btrfs_disk_key *disk_key, int nr)
1829 ptr = btrfs_node_key_ptr_offset(nr);
1830 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1831 struct btrfs_key_ptr, key, disk_key);
1834 /* struct btrfs_item */
1835 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1836 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1838 static inline unsigned long btrfs_item_nr_offset(int nr)
1840 return offsetof(struct btrfs_leaf, items) +
1841 sizeof(struct btrfs_item) * nr;
1844 static inline struct btrfs_item *btrfs_item_nr(int nr)
1846 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1849 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1850 struct btrfs_item *item)
1852 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1855 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1857 return btrfs_item_end(eb, btrfs_item_nr(nr));
1860 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr)
1862 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1865 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1867 return btrfs_item_size(eb, btrfs_item_nr(nr));
1870 static inline void btrfs_item_key(struct extent_buffer *eb,
1871 struct btrfs_disk_key *disk_key, int nr)
1873 struct btrfs_item *item = btrfs_item_nr(nr);
1874 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1877 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1878 struct btrfs_disk_key *disk_key, int nr)
1880 struct btrfs_item *item = btrfs_item_nr(nr);
1881 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1884 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1887 * struct btrfs_root_ref
1889 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1890 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1891 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1893 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1894 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1895 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1897 /* struct btrfs_dir_item */
1898 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1899 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1900 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1901 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1903 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1904 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1905 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1906 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1908 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1909 struct btrfs_dir_item *item,
1910 struct btrfs_disk_key *key)
1912 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1915 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1916 struct btrfs_dir_item *item,
1917 struct btrfs_disk_key *key)
1919 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1922 /* struct btrfs_free_space_header */
1923 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1925 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1927 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1930 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1931 struct btrfs_free_space_header *h,
1932 struct btrfs_disk_key *key)
1934 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1937 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1938 struct btrfs_free_space_header *h,
1939 struct btrfs_disk_key *key)
1941 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1944 /* struct btrfs_disk_key */
1945 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1947 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1948 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1950 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1951 struct btrfs_disk_key *disk)
1953 cpu->offset = le64_to_cpu(disk->offset);
1954 cpu->type = disk->type;
1955 cpu->objectid = le64_to_cpu(disk->objectid);
1958 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1959 struct btrfs_key *cpu)
1961 disk->offset = cpu_to_le64(cpu->offset);
1962 disk->type = cpu->type;
1963 disk->objectid = cpu_to_le64(cpu->objectid);
1966 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1967 struct btrfs_key *key, int nr)
1969 struct btrfs_disk_key disk_key;
1970 btrfs_node_key(eb, &disk_key, nr);
1971 btrfs_disk_key_to_cpu(key, &disk_key);
1974 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1975 struct btrfs_key *key, int nr)
1977 struct btrfs_disk_key disk_key;
1978 btrfs_item_key(eb, &disk_key, nr);
1979 btrfs_disk_key_to_cpu(key, &disk_key);
1982 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1983 struct btrfs_dir_item *item,
1984 struct btrfs_key *key)
1986 struct btrfs_disk_key disk_key;
1987 btrfs_dir_item_key(eb, item, &disk_key);
1988 btrfs_disk_key_to_cpu(key, &disk_key);
1991 /* struct btrfs_header */
1992 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1993 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1995 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1996 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1997 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1998 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1999 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
2000 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
2002 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
2003 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
2006 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
2008 return (btrfs_header_flags(eb) & flag) == flag;
2011 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
2013 u64 flags = btrfs_header_flags(eb);
2014 btrfs_set_header_flags(eb, flags | flag);
2015 return (flags & flag) == flag;
2018 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
2020 u64 flags = btrfs_header_flags(eb);
2021 btrfs_set_header_flags(eb, flags & ~flag);
2022 return (flags & flag) == flag;
2025 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
2027 u64 flags = btrfs_header_flags(eb);
2028 return flags >> BTRFS_BACKREF_REV_SHIFT;
2031 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
2034 u64 flags = btrfs_header_flags(eb);
2035 flags &= ~BTRFS_BACKREF_REV_MASK;
2036 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
2037 btrfs_set_header_flags(eb, flags);
2040 static inline unsigned long btrfs_header_fsid(void)
2042 return offsetof(struct btrfs_header, fsid);
2045 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
2047 return offsetof(struct btrfs_header, chunk_tree_uuid);
2050 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
2052 unsigned long ptr = offsetof(struct btrfs_header, csum);
2056 static inline int btrfs_is_leaf(struct extent_buffer *eb)
2058 return (btrfs_header_level(eb) == 0);
2061 /* struct btrfs_root_item */
2062 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
2064 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
2065 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
2066 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
2068 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
2070 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
2071 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
2072 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
2073 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
2074 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
2075 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
2076 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
2077 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
2079 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
2081 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
2083 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
2085 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
2087 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
2090 static inline struct btrfs_timespec* btrfs_root_ctime(
2091 struct btrfs_root_item *root_item)
2093 unsigned long ptr = (unsigned long)root_item;
2094 ptr += offsetof(struct btrfs_root_item, ctime);
2095 return (struct btrfs_timespec *)ptr;
2098 static inline struct btrfs_timespec* btrfs_root_otime(
2099 struct btrfs_root_item *root_item)
2101 unsigned long ptr = (unsigned long)root_item;
2102 ptr += offsetof(struct btrfs_root_item, otime);
2103 return (struct btrfs_timespec *)ptr;
2106 static inline struct btrfs_timespec* btrfs_root_stime(
2107 struct btrfs_root_item *root_item)
2109 unsigned long ptr = (unsigned long)root_item;
2110 ptr += offsetof(struct btrfs_root_item, stime);
2111 return (struct btrfs_timespec *)ptr;
2114 static inline struct btrfs_timespec* btrfs_root_rtime(
2115 struct btrfs_root_item *root_item)
2117 unsigned long ptr = (unsigned long)root_item;
2118 ptr += offsetof(struct btrfs_root_item, rtime);
2119 return (struct btrfs_timespec *)ptr;
2122 /* struct btrfs_root_backup */
2123 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
2125 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
2127 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
2128 tree_root_level, 8);
2130 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
2132 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
2133 chunk_root_gen, 64);
2134 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
2135 chunk_root_level, 8);
2137 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
2139 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
2140 extent_root_gen, 64);
2141 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
2142 extent_root_level, 8);
2144 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
2146 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
2148 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
2151 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2153 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2155 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2158 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2160 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2162 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2163 csum_root_level, 8);
2164 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2166 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2168 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2171 /* struct btrfs_super_block */
2173 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2174 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2175 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2177 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2178 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2179 struct btrfs_super_block, sys_chunk_array_size, 32);
2180 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2181 struct btrfs_super_block, chunk_root_generation, 64);
2182 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2184 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2186 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2187 chunk_root_level, 8);
2188 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2190 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2191 log_root_transid, 64);
2192 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2194 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2196 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2198 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2200 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2202 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2204 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2205 root_dir_objectid, 64);
2206 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2208 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2210 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2211 compat_ro_flags, 64);
2212 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2213 incompat_flags, 64);
2214 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2216 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2217 cache_generation, 64);
2218 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2219 uuid_tree_generation, 64);
2220 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2222 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2224 int t = btrfs_super_csum_type(s);
2225 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2226 return btrfs_csum_sizes[t];
2229 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2231 return offsetof(struct btrfs_leaf, items);
2234 /* struct btrfs_file_extent_item */
2235 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2238 static inline unsigned long btrfs_file_extent_inline_start(struct
2239 btrfs_file_extent_item *e)
2241 unsigned long offset = (unsigned long)e;
2242 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2246 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2248 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2251 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2253 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2255 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2257 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2259 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2260 disk_num_bytes, 64);
2261 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2263 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2265 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2267 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2269 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2271 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2273 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2275 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2277 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2279 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2280 other_encoding, 16);
2282 /* btrfs_qgroup_status_item */
2283 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2285 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2287 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2289 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2292 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2293 struct btrfs_qgroup_status_item, version, 64);
2294 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2295 struct btrfs_qgroup_status_item, generation, 64);
2296 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2297 struct btrfs_qgroup_status_item, flags, 64);
2298 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2299 struct btrfs_qgroup_status_item, rescan, 64);
2301 /* btrfs_qgroup_info_item */
2302 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2304 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2306 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2307 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2308 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2310 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2311 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2313 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2314 struct btrfs_qgroup_info_item, generation, 64);
2315 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2316 struct btrfs_qgroup_info_item, referenced, 64);
2317 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2318 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2319 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2320 struct btrfs_qgroup_info_item, exclusive, 64);
2321 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2322 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2324 /* btrfs_qgroup_limit_item */
2325 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2327 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2328 max_referenced, 64);
2329 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2331 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2332 rsv_referenced, 64);
2333 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2336 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2337 struct btrfs_qgroup_limit_item, flags, 64);
2338 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2339 struct btrfs_qgroup_limit_item, max_referenced, 64);
2340 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2341 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2342 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2343 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2344 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2345 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2347 /* btrfs_balance_item */
2348 BTRFS_SETGET_FUNCS(balance_item_flags, struct btrfs_balance_item, flags, 64);
2350 static inline struct btrfs_disk_balance_args* btrfs_balance_item_data(
2351 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2353 unsigned long offset = (unsigned long)bi;
2354 struct btrfs_balance_item *p;
2355 p = (struct btrfs_balance_item *)(eb->data + offset);
2359 static inline struct btrfs_disk_balance_args* btrfs_balance_item_meta(
2360 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2362 unsigned long offset = (unsigned long)bi;
2363 struct btrfs_balance_item *p;
2364 p = (struct btrfs_balance_item *)(eb->data + offset);
2368 static inline struct btrfs_disk_balance_args* btrfs_balance_item_sys(
2369 struct extent_buffer *eb, struct btrfs_balance_item *bi)
2371 unsigned long offset = (unsigned long)bi;
2372 struct btrfs_balance_item *p;
2373 p = (struct btrfs_balance_item *)(eb->data + offset);
2378 * btrfs_dev_stats_item helper, returns pointer to the raw array, do the
2379 * endiannes conversion, @dsi is offset to eb data
2381 static inline __le64* btrfs_dev_stats_values(struct extent_buffer *eb,
2382 struct btrfs_dev_stats_item *dsi)
2384 unsigned long offset = (unsigned long)dsi;
2385 struct btrfs_dev_stats_item *p;
2386 p = (struct btrfs_dev_stats_item *)(eb->data + offset);
2391 * this returns the number of bytes used by the item on disk, minus the
2392 * size of any extent headers. If a file is compressed on disk, this is
2393 * the compressed size
2395 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2396 struct btrfs_item *e)
2398 unsigned long offset;
2399 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2400 return btrfs_item_size(eb, e) - offset;
2403 /* struct btrfs_ioctl_search_header */
2404 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2406 return get_unaligned_64(&sh->transid);
2409 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2411 return get_unaligned_64(&sh->objectid);
2414 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2416 return get_unaligned_64(&sh->offset);
2419 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2421 return get_unaligned_32(&sh->type);
2424 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2426 return get_unaligned_32(&sh->len);
2429 /* this returns the number of file bytes represented by the inline item.
2430 * If an item is compressed, this is the uncompressed size
2432 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2434 struct btrfs_file_extent_item *fi)
2437 * return the space used on disk if this item isn't
2438 * compressed or encoded
2440 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2441 btrfs_file_extent_encryption(eb, fi) == 0 &&
2442 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2443 return btrfs_file_extent_inline_item_len(eb,
2444 btrfs_item_nr(slot));
2447 /* otherwise use the ram bytes field */
2448 return btrfs_file_extent_ram_bytes(eb, fi);
2451 #define btrfs_fs_incompat(fs_info, opt) \
2452 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt)
2454 static inline int __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2456 struct btrfs_super_block *disk_super;
2457 disk_super = fs_info->super_copy;
2458 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2461 #define btrfs_fs_compat_ro(fs_info, opt) \
2462 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt)
2464 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2466 struct btrfs_super_block *disk_super;
2467 disk_super = fs_info->super_copy;
2468 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2471 /* helper function to cast into the data area of the leaf. */
2472 #define btrfs_item_ptr(leaf, slot, type) \
2473 ((type *)(btrfs_leaf_data(leaf) + \
2474 btrfs_item_offset_nr(leaf, slot)))
2476 #define btrfs_item_ptr_offset(leaf, slot) \
2477 ((unsigned long)(btrfs_leaf_data(leaf) + \
2478 btrfs_item_offset_nr(leaf, slot)))
2481 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2482 struct btrfs_root *root,
2483 u64 num_bytes, u64 empty_size,
2484 u64 hint_byte, u64 search_end,
2485 struct btrfs_key *ins, bool is_data);
2486 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2487 struct btrfs_root *root);
2488 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2489 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2490 u64 bytenr, u64 num_bytes);
2491 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2492 struct btrfs_root *root);
2493 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2494 btrfs_fs_info *info,
2496 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2497 btrfs_fs_info *info,
2499 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root,
2501 u32 blocksize, u64 root_objectid,
2502 struct btrfs_disk_key *key, int level,
2503 u64 hint, u64 empty_size);
2504 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2505 struct btrfs_root *root, u64 bytenr,
2506 u64 offset, int metadata, u64 *refs, u64 *flags);
2507 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2508 struct btrfs_root *root,
2509 u64 bytenr, int level, u64 flags);
2510 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2511 struct extent_buffer *buf, int record_parent);
2512 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2513 struct extent_buffer *buf, int record_parent);
2514 int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root,
2516 struct extent_buffer *buf,
2517 u64 parent, int last_ref);
2518 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root,
2520 u64 bytenr, u64 num_bytes, u64 parent,
2521 u64 root_objectid, u64 owner, u64 offset);
2522 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2523 struct btrfs_root *root,
2524 struct extent_io_tree *unpin);
2525 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2526 struct btrfs_root *root,
2527 u64 bytenr, u64 num_bytes, u64 parent,
2528 u64 root_objectid, u64 ref_generation,
2529 u64 owner_objectid);
2530 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2531 struct btrfs_root *root, u64 bytenr,
2532 u64 orig_parent, u64 parent,
2533 u64 root_objectid, u64 ref_generation,
2534 u64 owner_objectid);
2535 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2536 struct btrfs_root *root);
2537 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2538 int btrfs_read_block_groups(struct btrfs_root *root);
2539 struct btrfs_block_group_cache *
2540 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2541 u64 chunk_offset, u64 size);
2542 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2543 struct btrfs_fs_info *fs_info, u64 bytes_used,
2544 u64 type, u64 chunk_offset, u64 size);
2545 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2546 struct btrfs_fs_info *fs_info);
2547 int btrfs_update_block_group(struct btrfs_root *root, u64 bytenr, u64 num,
2548 int alloc, int mark_free);
2549 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2550 struct btrfs_root *root, u64 objectid,
2551 struct btrfs_inode_item *inode,
2552 u64 file_pos, u64 disk_bytenr,
2554 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2555 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2556 void free_excluded_extents(struct btrfs_root *root,
2557 struct btrfs_block_group_cache *cache);
2558 int exclude_super_stripes(struct btrfs_root *root,
2559 struct btrfs_block_group_cache *cache);
2560 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2561 struct btrfs_fs_info *info, u64 start, u64 end);
2562 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2565 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2566 int btrfs_del_ptr(struct btrfs_root *root, struct btrfs_path *path,
2567 int level, int slot);
2568 enum btrfs_tree_block_status
2569 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2570 struct extent_buffer *buf);
2571 enum btrfs_tree_block_status
2572 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2573 struct extent_buffer *buf);
2574 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2575 int level, int slot, u64 objectid);
2576 struct extent_buffer *read_node_slot(struct btrfs_fs_info *fs_info,
2577 struct extent_buffer *parent, int slot);
2578 int btrfs_previous_item(struct btrfs_root *root,
2579 struct btrfs_path *path, u64 min_objectid,
2581 int btrfs_previous_extent_item(struct btrfs_root *root,
2582 struct btrfs_path *path, u64 min_objectid);
2583 int btrfs_next_extent_item(struct btrfs_root *root,
2584 struct btrfs_path *path, u64 max_objectid);
2585 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2586 struct btrfs_root *root, struct extent_buffer *buf,
2587 struct extent_buffer *parent, int parent_slot,
2588 struct extent_buffer **cow_ret);
2589 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2590 struct btrfs_root *root,
2591 struct extent_buffer *buf,
2592 struct extent_buffer *parent, int parent_slot,
2593 struct extent_buffer **cow_ret,
2594 u64 search_start, u64 empty_size);
2595 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2596 struct btrfs_root *root,
2597 struct extent_buffer *buf,
2598 struct extent_buffer **cow_ret, u64 new_root_objectid);
2599 int btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path,
2601 int btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path,
2602 u32 new_size, int from_end);
2603 int btrfs_split_item(struct btrfs_trans_handle *trans,
2604 struct btrfs_root *root,
2605 struct btrfs_path *path,
2606 struct btrfs_key *new_key,
2607 unsigned long split_offset);
2608 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2609 *root, struct btrfs_key *key, struct btrfs_path *p, int
2611 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2612 u64 iobjectid, u64 ioff, u8 key_type,
2613 struct btrfs_key *found_key);
2614 void btrfs_release_path(struct btrfs_path *p);
2615 void add_root_to_dirty_list(struct btrfs_root *root);
2616 struct btrfs_path *btrfs_alloc_path(void);
2617 void btrfs_free_path(struct btrfs_path *p);
2618 void btrfs_init_path(struct btrfs_path *p);
2619 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2620 struct btrfs_path *path, int slot, int nr);
2622 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2623 struct btrfs_root *root,
2624 struct btrfs_path *path)
2626 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2629 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2630 *root, struct btrfs_key *key, void *data, u32 data_size);
2631 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2632 struct btrfs_root *root,
2633 struct btrfs_path *path,
2634 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2636 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2637 struct btrfs_root *root,
2638 struct btrfs_path *path,
2639 struct btrfs_key *key,
2642 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2645 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2646 static inline int btrfs_next_item(struct btrfs_root *root,
2647 struct btrfs_path *p)
2650 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2651 return btrfs_next_leaf(root, p);
2655 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2656 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2657 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2658 struct btrfs_disk_key *key, int level);
2659 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2660 struct btrfs_key *new_key);
2661 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2662 struct btrfs_path *path,
2663 struct btrfs_key *new_key);
2666 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2667 struct btrfs_root *tree_root,
2668 u64 root_id, u8 type, u64 ref_id,
2669 u64 dirid, u64 sequence,
2670 const char *name, int name_len);
2671 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2672 *root, struct btrfs_key *key, struct btrfs_root_item
2674 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2675 struct btrfs_key *key);
2676 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2677 *root, struct btrfs_key *key, struct btrfs_root_item
2679 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2680 btrfs_root_item *item, struct btrfs_key *key);
2682 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2683 *root, const char *name, int name_len, u64 dir,
2684 struct btrfs_key *location, u8 type, u64 index);
2685 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2686 struct btrfs_root *root,
2687 struct btrfs_path *path, u64 dir,
2688 const char *name, int name_len,
2690 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2691 struct btrfs_root *root,
2692 struct btrfs_path *path, u64 dir,
2693 const char *name, int name_len,
2694 u64 index, int mod);
2695 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2696 struct btrfs_root *root,
2697 struct btrfs_path *path,
2698 struct btrfs_dir_item *di);
2699 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2700 struct btrfs_root *root, const char *name,
2701 u16 name_len, const void *data, u16 data_len,
2704 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2705 struct btrfs_root *fs_root,
2706 u64 dirid, u64 *objectid);
2709 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2710 struct btrfs_root *root,
2711 const char *name, int name_len,
2712 u64 inode_objectid, u64 ref_objectid, u64 index);
2713 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2714 *root, u64 objectid, struct btrfs_inode_item
2716 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2717 *root, struct btrfs_path *path,
2718 struct btrfs_key *location, int mod);
2719 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2720 *trans, struct btrfs_path *path, struct btrfs_root *root,
2721 u64 ino, u64 parent_ino, u64 index, const char *name,
2722 int namelen, int ins_len);
2723 int btrfs_del_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,
2728 int btrfs_insert_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, u64 index);
2732 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2733 struct btrfs_root *root, struct btrfs_path *path,
2734 const char *name, int namelen, u64 ino, u64 parent_ino,
2736 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2737 struct btrfs_root *root, const char *name, int name_len,
2738 u64 ino, u64 parent_ino, u64 *index);
2741 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2742 struct btrfs_root *root, u64 bytenr, u64 len);
2743 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2744 struct btrfs_root *root,
2745 u64 objectid, u64 pos, u64 offset,
2748 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2749 struct btrfs_root *root, u64 objectid,
2750 u64 offset, const char *buffer, size_t size);
2751 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2752 struct btrfs_root *root, u64 alloc_end,
2753 u64 bytenr, char *data, size_t len);
2754 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2755 struct btrfs_root *root, struct btrfs_path *path,
2759 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2760 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2763 static inline int is_fstree(u64 rootid)
2765 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2766 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2772 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2773 u64 dir, u64 index);
2774 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2776 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2777 struct btrfs_root *root, u64 ino, u64 flags);
2778 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2779 u64 ino, u64 parent_ino, char *name, int namelen,
2780 u8 type, u64 *index, int add_backref, int ignore_existed);
2781 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2782 u64 ino, u64 parent_ino, u64 index, const char *name,
2783 int namelen, int add_orphan);
2784 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2785 struct btrfs_root *root, struct btrfs_path *path,
2787 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2788 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2789 struct btrfs_root *btrfs_mksubvol(struct btrfs_root *root, const char *base,
2790 u64 root_objectid, bool convert);
2793 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2794 struct btrfs_root *root,
2795 struct btrfs_path *path,
2796 u64 ino, u64 offset, u64 len, int ins_len);
2797 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2798 struct btrfs_root *root,
2799 u64 ino, u64 offset, u64 len);
2800 int btrfs_read_file(struct btrfs_root *root, u64 ino, u64 start, int len,