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__
22 #if BTRFS_FLAT_INCLUDES
24 #include "kerncompat.h"
25 #include "radix-tree.h"
26 #include "extent-cache.h"
27 #include "extent_io.h"
30 #include <btrfs/list.h>
31 #include <btrfs/kerncompat.h>
32 #include <btrfs/radix-tree.h>
33 #include <btrfs/extent-cache.h>
34 #include <btrfs/extent_io.h>
35 #include <btrfs/ioctl.h>
36 #endif /* BTRFS_FLAT_INCLUDES */
39 struct btrfs_trans_handle;
40 struct btrfs_free_space_ctl;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
44 * Fake signature for an unfinalized filesystem, structures might be partially
47 #define BTRFS_MAGIC_PARTIAL 0x4D5F536652484221ULL /* ascii !BHRfS_M, no null */
49 #define BTRFS_MAX_MIRRORS 3
51 #define BTRFS_MAX_LEVEL 8
53 #define BTRFS_COMPAT_EXTENT_TREE_V0
55 /* holds pointers to all of the tree roots */
56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
58 /* stores information about which extents are in use, and reference counts */
59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
62 * chunk tree stores translations from logical -> physical block numbering
63 * the super block points to the chunk tree
65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
68 * stores information about which areas of a given device are in use.
69 * one per device. The tree of tree roots points to the device tree
71 #define BTRFS_DEV_TREE_OBJECTID 4ULL
73 /* one per subvolume, storing files and directories */
74 #define BTRFS_FS_TREE_OBJECTID 5ULL
76 /* directory objectid inside the root tree */
77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
78 /* holds checksums of all the data extents */
79 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
80 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
82 /* for storing items that use the BTRFS_UUID_KEY* */
83 #define BTRFS_UUID_TREE_OBJECTID 9ULL
85 /* tracks free space in block groups. */
86 #define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
88 /* for storing balance parameters in the root tree */
89 #define BTRFS_BALANCE_OBJECTID -4ULL
91 /* oprhan objectid for tracking unlinked/truncated files */
92 #define BTRFS_ORPHAN_OBJECTID -5ULL
94 /* does write ahead logging to speed up fsyncs */
95 #define BTRFS_TREE_LOG_OBJECTID -6ULL
96 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
99 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
100 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
103 * extent checksums all have this objectid
104 * this allows them to share the logging tree
107 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
109 /* For storing free space cache */
110 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
113 * The inode number assigned to the special inode for sotring
116 #define BTRFS_FREE_INO_OBJECTID -12ULL
118 /* dummy objectid represents multiple objectids */
119 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
122 * All files have objectids in this range.
124 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
125 #define BTRFS_LAST_FREE_OBJECTID -256ULL
126 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
131 * the device items go into the chunk tree. The key is in the form
132 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
134 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
137 * the max metadata block size. This limit is somewhat artificial,
138 * but the memmove costs go through the roof for larger blocks.
140 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
143 * we can actually store much bigger names, but lets not confuse the rest
146 #define BTRFS_NAME_LEN 255
149 * Theoretical limit is larger, but we keep this down to a sane
150 * value. That should limit greatly the possibility of collisions on
153 #define BTRFS_LINK_MAX 65535U
155 /* 32 bytes in various csum fields */
156 #define BTRFS_CSUM_SIZE 32
159 #define BTRFS_CSUM_TYPE_CRC32 0
161 static int btrfs_csum_sizes[] = { 4 };
163 /* four bytes for CRC32 */
164 #define BTRFS_CRC32_SIZE 4
165 #define BTRFS_EMPTY_DIR_SIZE 0
167 #define BTRFS_FT_UNKNOWN 0
168 #define BTRFS_FT_REG_FILE 1
169 #define BTRFS_FT_DIR 2
170 #define BTRFS_FT_CHRDEV 3
171 #define BTRFS_FT_BLKDEV 4
172 #define BTRFS_FT_FIFO 5
173 #define BTRFS_FT_SOCK 6
174 #define BTRFS_FT_SYMLINK 7
175 #define BTRFS_FT_XATTR 8
176 #define BTRFS_FT_MAX 9
178 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
181 * the key defines the order in the tree, and so it also defines (optimal)
182 * block layout. objectid corresponds to the inode number. The flags
183 * tells us things about the object, and is a kind of stream selector.
184 * so for a given inode, keys with flags of 1 might refer to the inode
185 * data, flags of 2 may point to file data in the btree and flags == 3
186 * may point to extents.
188 * offset is the starting byte offset for this key in the stream.
190 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
191 * in cpu native order. Otherwise they are identical and their sizes
192 * should be the same (ie both packed)
194 struct btrfs_disk_key {
198 } __attribute__ ((__packed__));
204 } __attribute__ ((__packed__));
206 struct btrfs_mapping_tree {
207 struct cache_tree cache_tree;
210 #define BTRFS_UUID_SIZE 16
211 struct btrfs_dev_item {
212 /* the internal btrfs device id */
215 /* size of the device */
221 /* optimal io alignment for this device */
224 /* optimal io width for this device */
227 /* minimal io size for this device */
230 /* type and info about this device */
233 /* expected generation for this device */
237 * starting byte of this partition on the device,
238 * to allow for stripe alignment in the future
242 /* grouping information for allocation decisions */
245 /* seek speed 0-100 where 100 is fastest */
248 /* bandwidth 0-100 where 100 is fastest */
251 /* btrfs generated uuid for this device */
252 u8 uuid[BTRFS_UUID_SIZE];
254 /* uuid of FS who owns this device */
255 u8 fsid[BTRFS_UUID_SIZE];
256 } __attribute__ ((__packed__));
258 struct btrfs_stripe {
261 u8 dev_uuid[BTRFS_UUID_SIZE];
262 } __attribute__ ((__packed__));
265 /* size of this chunk in bytes */
268 /* objectid of the root referencing this chunk */
274 /* optimal io alignment for this chunk */
277 /* optimal io width for this chunk */
280 /* minimal io size for this chunk */
283 /* 2^16 stripes is quite a lot, a second limit is the size of a single
288 /* sub stripes only matter for raid10 */
290 struct btrfs_stripe stripe;
291 /* additional stripes go here */
292 } __attribute__ ((__packed__));
294 #define BTRFS_FREE_SPACE_EXTENT 1
295 #define BTRFS_FREE_SPACE_BITMAP 2
297 struct btrfs_free_space_entry {
301 } __attribute__ ((__packed__));
303 struct btrfs_free_space_header {
304 struct btrfs_disk_key location;
308 } __attribute__ ((__packed__));
310 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
312 BUG_ON(num_stripes == 0);
313 return sizeof(struct btrfs_chunk) +
314 sizeof(struct btrfs_stripe) * (num_stripes - 1);
317 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
318 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
319 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
320 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
321 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
322 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
324 #define BTRFS_BACKREF_REV_MAX 256
325 #define BTRFS_BACKREF_REV_SHIFT 56
326 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
327 BTRFS_BACKREF_REV_SHIFT)
329 #define BTRFS_OLD_BACKREF_REV 0
330 #define BTRFS_MIXED_BACKREF_REV 1
333 * every tree block (leaf or node) starts with this header.
335 struct btrfs_header {
336 /* these first four must match the super block */
337 u8 csum[BTRFS_CSUM_SIZE];
338 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
339 __le64 bytenr; /* which block this node is supposed to live in */
342 /* allowed to be different from the super from here on down */
343 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
348 } __attribute__ ((__packed__));
350 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
351 sizeof(struct btrfs_header)) / \
352 sizeof(struct btrfs_key_ptr))
353 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
354 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->nodesize))
355 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
356 sizeof(struct btrfs_item) - \
357 sizeof(struct btrfs_file_extent_item))
358 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
359 sizeof(struct btrfs_item) -\
360 sizeof(struct btrfs_dir_item))
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 */
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 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
469 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
470 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
471 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
474 * some patches floated around with a second compression method
475 * lets save that incompat here for when they do get in
476 * Note we don't actually support it, we're just reserving the
479 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
482 * older kernels tried to do bigger metadata blocks, but the
483 * code was pretty buggy. Lets not let them try anymore.
485 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
486 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
487 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
488 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
489 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
491 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
493 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
495 #define BTRFS_FEATURE_INCOMPAT_SUPP \
496 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
497 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
498 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
499 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
500 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
501 BTRFS_FEATURE_INCOMPAT_RAID56 | \
502 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
503 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
504 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
507 * A leaf is full of items. offset and size tell us where to find
508 * the item in the leaf (relative to the start of the data area)
511 struct btrfs_disk_key key;
514 } __attribute__ ((__packed__));
517 * leaves have an item area and a data area:
518 * [item0, item1....itemN] [free space] [dataN...data1, data0]
520 * The data is separate from the items to get the keys closer together
524 struct btrfs_header header;
525 struct btrfs_item items[];
526 } __attribute__ ((__packed__));
529 * all non-leaf blocks are nodes, they hold only keys and pointers to
532 struct btrfs_key_ptr {
533 struct btrfs_disk_key key;
536 } __attribute__ ((__packed__));
539 struct btrfs_header header;
540 struct btrfs_key_ptr ptrs[];
541 } __attribute__ ((__packed__));
544 * btrfs_paths remember the path taken from the root down to the leaf.
545 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
546 * to any other levels that are present.
548 * The slots array records the index of the item or block pointer
549 * used while walking the tree.
553 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
554 int slots[BTRFS_MAX_LEVEL];
555 /* if there is real range locking, this locks field will change */
556 int locks[BTRFS_MAX_LEVEL];
558 /* keep some upper locks as we walk down */
562 * set by btrfs_split_item, tells search_slot to keep all locks
563 * and to force calls to keep space in the nodes
565 unsigned int search_for_split:1;
566 unsigned int skip_check_block:1;
570 * items in the extent btree are used to record the objectid of the
571 * owner of the block and the number of references
574 struct btrfs_extent_item {
578 } __attribute__ ((__packed__));
580 struct btrfs_extent_item_v0 {
582 } __attribute__ ((__packed__));
584 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
585 sizeof(struct btrfs_item))
586 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
588 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
589 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
591 /* following flags only apply to tree blocks */
593 /* use full backrefs for extent pointers in the block*/
594 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
596 struct btrfs_tree_block_info {
597 struct btrfs_disk_key key;
599 } __attribute__ ((__packed__));
601 struct btrfs_extent_data_ref {
606 } __attribute__ ((__packed__));
608 struct btrfs_shared_data_ref {
610 } __attribute__ ((__packed__));
612 struct btrfs_extent_inline_ref {
615 } __attribute__ ((__packed__));
617 struct btrfs_extent_ref_v0 {
622 } __attribute__ ((__packed__));
624 /* dev extents record free space on individual devices. The owner
625 * field points back to the chunk allocation mapping tree that allocated
626 * the extent. The chunk tree uuid field is a way to double check the owner
628 struct btrfs_dev_extent {
630 __le64 chunk_objectid;
633 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
634 } __attribute__ ((__packed__));
636 struct btrfs_inode_ref {
640 } __attribute__ ((__packed__));
642 struct btrfs_inode_extref {
643 __le64 parent_objectid;
646 __u8 name[0]; /* name goes here */
647 } __attribute__ ((__packed__));
649 struct btrfs_timespec {
652 } __attribute__ ((__packed__));
655 BTRFS_COMPRESS_NONE = 0,
656 BTRFS_COMPRESS_ZLIB = 1,
657 BTRFS_COMPRESS_LZO = 2,
658 BTRFS_COMPRESS_TYPES = 2,
659 BTRFS_COMPRESS_LAST = 3,
660 } btrfs_compression_type;
662 /* we don't understand any encryption methods right now */
664 BTRFS_ENCRYPTION_NONE = 0,
665 BTRFS_ENCRYPTION_LAST = 1,
666 } btrfs_encryption_type;
668 enum btrfs_tree_block_status {
669 BTRFS_TREE_BLOCK_CLEAN,
670 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
671 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
672 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
673 BTRFS_TREE_BLOCK_INVALID_LEVEL,
674 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
675 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
678 struct btrfs_inode_item {
679 /* nfs style generation number */
681 /* transid that last touched this inode */
693 /* modification sequence number for NFS */
697 * a little future expansion, for more than this we can
698 * just grow the inode item and version it
701 struct btrfs_timespec atime;
702 struct btrfs_timespec ctime;
703 struct btrfs_timespec mtime;
704 struct btrfs_timespec otime;
705 } __attribute__ ((__packed__));
707 struct btrfs_dir_log_item {
709 } __attribute__ ((__packed__));
711 struct btrfs_dir_item {
712 struct btrfs_disk_key location;
717 } __attribute__ ((__packed__));
719 struct btrfs_root_item_v0 {
720 struct btrfs_inode_item inode;
726 __le64 last_snapshot;
729 struct btrfs_disk_key drop_progress;
732 } __attribute__ ((__packed__));
734 struct btrfs_root_item {
735 struct btrfs_inode_item inode;
741 __le64 last_snapshot;
744 struct btrfs_disk_key drop_progress;
749 * The following fields appear after subvol_uuids+subvol_times
754 * This generation number is used to test if the new fields are valid
755 * and up to date while reading the root item. Every time the root item
756 * is written out, the "generation" field is copied into this field. If
757 * anyone ever mounted the fs with an older kernel, we will have
758 * mismatching generation values here and thus must invalidate the
759 * new fields. See btrfs_update_root and btrfs_find_last_root for
761 * the offset of generation_v2 is also used as the start for the memset
762 * when invalidating the fields.
764 __le64 generation_v2;
765 u8 uuid[BTRFS_UUID_SIZE];
766 u8 parent_uuid[BTRFS_UUID_SIZE];
767 u8 received_uuid[BTRFS_UUID_SIZE];
768 __le64 ctransid; /* updated when an inode changes */
769 __le64 otransid; /* trans when created */
770 __le64 stransid; /* trans when sent. non-zero for received subvol */
771 __le64 rtransid; /* trans when received. non-zero for received subvol */
772 struct btrfs_timespec ctime;
773 struct btrfs_timespec otime;
774 struct btrfs_timespec stime;
775 struct btrfs_timespec rtime;
776 __le64 reserved[8]; /* for future */
777 } __attribute__ ((__packed__));
780 * this is used for both forward and backward root refs
782 struct btrfs_root_ref {
786 } __attribute__ ((__packed__));
788 #define BTRFS_FILE_EXTENT_INLINE 0
789 #define BTRFS_FILE_EXTENT_REG 1
790 #define BTRFS_FILE_EXTENT_PREALLOC 2
792 struct btrfs_file_extent_item {
794 * transaction id that created this extent
798 * max number of bytes to hold this extent in ram
799 * when we split a compressed extent we can't know how big
800 * each of the resulting pieces will be. So, this is
801 * an upper limit on the size of the extent in ram instead of
807 * 32 bits for the various ways we might encode the data,
808 * including compression and encryption. If any of these
809 * are set to something a given disk format doesn't understand
810 * it is treated like an incompat flag for reading and writing,
815 __le16 other_encoding; /* spare for later use */
817 /* are we inline data or a real extent? */
821 * disk space consumed by the extent, checksum blocks are included
825 __le64 disk_num_bytes;
827 * the logical offset in file blocks (no csums)
828 * this extent record is for. This allows a file extent to point
829 * into the middle of an existing extent on disk, sharing it
830 * between two snapshots (useful if some bytes in the middle of the
831 * extent have changed
835 * the logical number of file blocks (no csums included)
839 } __attribute__ ((__packed__));
841 struct btrfs_csum_item {
843 } __attribute__ ((__packed__));
846 * We don't want to overwrite 1M at the beginning of device, even though
847 * there is our 1st superblock at 64k. Some possible reasons:
848 * - the first 64k blank is useful for some boot loader/manager
849 * - the first 1M could be scratched by buggy partitioner or somesuch
851 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
853 /* tag for the radix tree of block groups in ram */
854 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
855 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
856 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
857 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
858 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
859 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
860 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
861 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
862 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
863 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
864 #define BTRFS_NR_RAID_TYPES 7
866 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
867 BTRFS_BLOCK_GROUP_SYSTEM | \
868 BTRFS_BLOCK_GROUP_METADATA)
870 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
871 BTRFS_BLOCK_GROUP_RAID1 | \
872 BTRFS_BLOCK_GROUP_RAID5 | \
873 BTRFS_BLOCK_GROUP_RAID6 | \
874 BTRFS_BLOCK_GROUP_DUP | \
875 BTRFS_BLOCK_GROUP_RAID10)
877 /* used in struct btrfs_balance_args fields */
878 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
881 * GLOBAL_RSV does not exist as a on-disk block group type and is used
882 * internally for exporting info about global block reserve from space infos
884 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
886 #define BTRFS_QGROUP_LEVEL_SHIFT 48
888 static inline u64 btrfs_qgroup_level(u64 qgroupid)
890 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
893 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
895 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
898 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
899 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
900 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
902 struct btrfs_qgroup_status_item {
906 __le64 rescan; /* progress during scanning */
907 } __attribute__ ((__packed__));
909 struct btrfs_block_group_item {
911 __le64 chunk_objectid;
913 } __attribute__ ((__packed__));
915 struct btrfs_free_space_info {
918 } __attribute__ ((__packed__));
920 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
922 struct btrfs_qgroup_info_item {
925 __le64 referenced_compressed;
927 __le64 exclusive_compressed;
928 } __attribute__ ((__packed__));
930 /* flags definition for qgroup limits */
931 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
932 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
933 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
934 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
935 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
936 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
938 struct btrfs_qgroup_limit_item {
940 __le64 max_referenced;
941 __le64 max_exclusive;
942 __le64 rsv_referenced;
943 __le64 rsv_exclusive;
944 } __attribute__ ((__packed__));
946 struct btrfs_space_info {
952 struct list_head list;
955 struct btrfs_block_group_cache {
956 struct cache_extent cache;
957 struct btrfs_key key;
958 struct btrfs_block_group_item item;
959 struct btrfs_space_info *space_info;
960 struct btrfs_free_space_ctl *free_space_ctl;
969 struct btrfs_fs_devices;
970 struct btrfs_fs_info {
971 u8 fsid[BTRFS_FSID_SIZE];
973 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
974 u8 *new_chunk_tree_uuid;
975 struct btrfs_root *fs_root;
976 struct btrfs_root *extent_root;
977 struct btrfs_root *tree_root;
978 struct btrfs_root *chunk_root;
979 struct btrfs_root *dev_root;
980 struct btrfs_root *csum_root;
981 struct btrfs_root *quota_root;
982 struct btrfs_root *free_space_root;
984 struct rb_root fs_root_tree;
986 /* the log root tree is a directory of all the other log roots */
987 struct btrfs_root *log_root_tree;
989 struct extent_io_tree extent_cache;
990 struct extent_io_tree free_space_cache;
991 struct extent_io_tree block_group_cache;
992 struct extent_io_tree pinned_extents;
993 struct extent_io_tree pending_del;
994 struct extent_io_tree extent_ins;
995 struct extent_io_tree *excluded_extents;
997 /* logical->physical extent mapping */
998 struct btrfs_mapping_tree mapping_tree;
1001 u64 last_trans_committed;
1003 u64 avail_data_alloc_bits;
1004 u64 avail_metadata_alloc_bits;
1005 u64 avail_system_alloc_bits;
1006 u64 data_alloc_profile;
1007 u64 metadata_alloc_profile;
1008 u64 system_alloc_profile;
1011 struct btrfs_trans_handle *running_transaction;
1012 struct btrfs_super_block *super_copy;
1013 struct mutex fs_mutex;
1018 struct list_head dirty_cowonly_roots;
1019 struct list_head recow_ebs;
1021 struct btrfs_fs_devices *fs_devices;
1022 struct list_head space_info;
1025 unsigned int readonly:1;
1026 unsigned int on_restoring:1;
1027 unsigned int is_chunk_recover:1;
1028 unsigned int quota_enabled:1;
1029 unsigned int suppress_check_block_errors:1;
1030 unsigned int ignore_fsid_mismatch:1;
1031 unsigned int ignore_chunk_tree_error:1;
1032 unsigned int avoid_meta_chunk_alloc:1;
1033 unsigned int avoid_sys_chunk_alloc:1;
1034 unsigned int finalize_on_close:1;
1036 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1037 struct btrfs_root *root,
1038 u64 bytenr, u64 num_bytes, u64 parent,
1039 u64 root_objectid, u64 owner, u64 offset,
1041 struct cache_tree *fsck_extent_cache;
1042 struct cache_tree *corrupt_blocks;
1047 * in ram representation of the tree. extent_root is used for all allocations
1048 * and for the extent tree extent_root root.
1051 struct extent_buffer *node;
1052 struct extent_buffer *commit_root;
1053 struct btrfs_root_item root_item;
1054 struct btrfs_key root_key;
1055 struct btrfs_fs_info *fs_info;
1059 /* data allocations are done in sectorsize units */
1062 /* node allocations are done in nodesize units */
1065 /* Unused, equal to nodesize */
1068 /* leaf allocations are done in nodesize units */
1077 u64 last_inode_alloc;
1080 * Record orphan data extent ref
1082 * TODO: Don't restore things in btrfs_root.
1083 * Directly record it into inode_record, which needs a lot of
1084 * infrastructure change to allow cooperation between extent
1087 struct list_head orphan_data_extents;
1089 /* the dirty list is only used by non-reference counted roots */
1090 struct list_head dirty_list;
1091 struct rb_node rb_node;
1095 * inode items have the data typically returned from stat and store other
1096 * info about object characteristics. There is one for every file and dir in
1099 #define BTRFS_INODE_ITEM_KEY 1
1100 #define BTRFS_INODE_REF_KEY 12
1101 #define BTRFS_INODE_EXTREF_KEY 13
1102 #define BTRFS_XATTR_ITEM_KEY 24
1103 #define BTRFS_ORPHAN_ITEM_KEY 48
1105 #define BTRFS_DIR_LOG_ITEM_KEY 60
1106 #define BTRFS_DIR_LOG_INDEX_KEY 72
1108 * dir items are the name -> inode pointers in a directory. There is one
1109 * for every name in a directory.
1111 #define BTRFS_DIR_ITEM_KEY 84
1112 #define BTRFS_DIR_INDEX_KEY 96
1115 * extent data is for file data
1117 #define BTRFS_EXTENT_DATA_KEY 108
1120 * csum items have the checksums for data in the extents
1122 #define BTRFS_CSUM_ITEM_KEY 120
1124 * extent csums are stored in a separate tree and hold csums for
1125 * an entire extent on disk.
1127 #define BTRFS_EXTENT_CSUM_KEY 128
1130 * root items point to tree roots. There are typically in the root
1131 * tree used by the super block to find all the other trees
1133 #define BTRFS_ROOT_ITEM_KEY 132
1136 * root backrefs tie subvols and snapshots to the directory entries that
1139 #define BTRFS_ROOT_BACKREF_KEY 144
1142 * root refs make a fast index for listing all of the snapshots and
1143 * subvolumes referenced by a given root. They point directly to the
1144 * directory item in the root that references the subvol
1146 #define BTRFS_ROOT_REF_KEY 156
1149 * extent items are in the extent map tree. These record which blocks
1150 * are used, and how many references there are to each block
1152 #define BTRFS_EXTENT_ITEM_KEY 168
1155 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1156 * the length, so we save the level in key->offset instead of the length.
1158 #define BTRFS_METADATA_ITEM_KEY 169
1160 #define BTRFS_TREE_BLOCK_REF_KEY 176
1162 #define BTRFS_EXTENT_DATA_REF_KEY 178
1164 /* old style extent backrefs */
1165 #define BTRFS_EXTENT_REF_V0_KEY 180
1167 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1169 #define BTRFS_SHARED_DATA_REF_KEY 184
1173 * block groups give us hints into the extent allocation trees. Which
1174 * blocks are free etc etc
1176 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1179 * Every block group is represented in the free space tree by a free space info
1180 * item, which stores some accounting information. It is keyed on
1181 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1183 #define BTRFS_FREE_SPACE_INFO_KEY 198
1186 * A free space extent tracks an extent of space that is free in a block group.
1187 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1189 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1192 * When a block group becomes very fragmented, we convert it to use bitmaps
1193 * instead of extents. A free space bitmap is keyed on
1194 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1195 * (length / sectorsize) bits.
1197 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1199 #define BTRFS_DEV_EXTENT_KEY 204
1200 #define BTRFS_DEV_ITEM_KEY 216
1201 #define BTRFS_CHUNK_ITEM_KEY 228
1203 #define BTRFS_BALANCE_ITEM_KEY 248
1208 #define BTRFS_QGROUP_STATUS_KEY 240
1209 #define BTRFS_QGROUP_INFO_KEY 242
1210 #define BTRFS_QGROUP_LIMIT_KEY 244
1211 #define BTRFS_QGROUP_RELATION_KEY 246
1214 * Persistently stores the io stats in the device tree.
1215 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1217 #define BTRFS_DEV_STATS_KEY 249
1220 * Persistently stores the device replace state in the device tree.
1221 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1223 #define BTRFS_DEV_REPLACE_KEY 250
1226 * Stores items that allow to quickly map UUIDs to something else.
1227 * These items are part of the filesystem UUID tree.
1228 * The key is built like this:
1229 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1231 #if BTRFS_UUID_SIZE != 16
1232 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1234 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1235 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1236 * received subvols */
1239 * string items are for debugging. They just store a short string of
1242 #define BTRFS_STRING_ITEM_KEY 253
1246 #define BTRFS_INODE_NODATASUM (1 << 0)
1247 #define BTRFS_INODE_NODATACOW (1 << 1)
1248 #define BTRFS_INODE_READONLY (1 << 2)
1250 #define read_eb_member(eb, ptr, type, member, result) ( \
1251 read_extent_buffer(eb, (char *)(result), \
1252 ((unsigned long)(ptr)) + \
1253 offsetof(type, member), \
1254 sizeof(((type *)0)->member)))
1256 #define write_eb_member(eb, ptr, type, member, result) ( \
1257 write_extent_buffer(eb, (char *)(result), \
1258 ((unsigned long)(ptr)) + \
1259 offsetof(type, member), \
1260 sizeof(((type *)0)->member)))
1262 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1263 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1265 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1266 return le##bits##_to_cpu(h->member); \
1268 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1271 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1272 h->member = cpu_to_le##bits(val); \
1275 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1276 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1279 unsigned long offset = (unsigned long)s; \
1280 const type *p = (type *) (eb->data + offset); \
1281 return get_unaligned_le##bits(&p->member); \
1283 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1284 type *s, u##bits val) \
1286 unsigned long offset = (unsigned long)s; \
1287 type *p = (type *) (eb->data + offset); \
1288 put_unaligned_le##bits(val, &p->member); \
1291 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1292 static inline u##bits btrfs_##name(const type *s) \
1294 return le##bits##_to_cpu(s->member); \
1296 static inline void btrfs_set_##name(type *s, u##bits val) \
1298 s->member = cpu_to_le##bits(val); \
1301 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1302 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1303 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1304 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1305 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1306 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1308 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1309 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1310 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1311 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1312 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1313 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1315 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1316 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1318 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1320 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1322 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1324 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1326 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1329 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1331 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1333 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1336 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1338 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1341 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1343 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1346 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1347 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1348 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1349 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1350 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1351 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1352 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1353 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1354 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1355 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1356 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1358 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1360 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1363 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1364 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1367 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1369 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1371 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1373 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1376 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1378 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1379 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1381 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1384 unsigned long offset = (unsigned long)c;
1385 offset += offsetof(struct btrfs_chunk, stripe);
1386 offset += nr * sizeof(struct btrfs_stripe);
1387 return (struct btrfs_stripe *)offset;
1390 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1392 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1395 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1396 struct btrfs_chunk *c, int nr)
1398 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1401 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1402 struct btrfs_chunk *c, int nr,
1405 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1408 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1409 struct btrfs_chunk *c, int nr)
1411 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1414 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1415 struct btrfs_chunk *c, int nr,
1418 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1421 /* struct btrfs_block_group_item */
1422 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1424 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1426 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1427 struct btrfs_block_group_item, chunk_objectid, 64);
1429 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1430 struct btrfs_block_group_item, chunk_objectid, 64);
1431 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1432 struct btrfs_block_group_item, flags, 64);
1433 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1434 struct btrfs_block_group_item, flags, 64);
1436 /* struct btrfs_free_space_info */
1437 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1439 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1441 /* struct btrfs_inode_ref */
1442 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1443 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1444 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1446 /* struct btrfs_inode_extref */
1447 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1448 parent_objectid, 64);
1449 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1451 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1453 /* struct btrfs_inode_item */
1454 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1455 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1456 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1457 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1458 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1459 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1460 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1461 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1462 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1463 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1464 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1465 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1467 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1468 struct btrfs_inode_item, generation, 64);
1469 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1470 struct btrfs_inode_item, sequence, 64);
1471 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1472 struct btrfs_inode_item, transid, 64);
1473 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1474 struct btrfs_inode_item, size, 64);
1475 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1476 struct btrfs_inode_item, nbytes, 64);
1477 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1478 struct btrfs_inode_item, block_group, 64);
1479 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1480 struct btrfs_inode_item, nlink, 32);
1481 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1482 struct btrfs_inode_item, uid, 32);
1483 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1484 struct btrfs_inode_item, gid, 32);
1485 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1486 struct btrfs_inode_item, mode, 32);
1487 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1488 struct btrfs_inode_item, rdev, 64);
1489 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1490 struct btrfs_inode_item, flags, 64);
1492 static inline struct btrfs_timespec *
1493 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1495 unsigned long ptr = (unsigned long)inode_item;
1496 ptr += offsetof(struct btrfs_inode_item, atime);
1497 return (struct btrfs_timespec *)ptr;
1500 static inline struct btrfs_timespec *
1501 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1503 unsigned long ptr = (unsigned long)inode_item;
1504 ptr += offsetof(struct btrfs_inode_item, mtime);
1505 return (struct btrfs_timespec *)ptr;
1508 static inline struct btrfs_timespec *
1509 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1511 unsigned long ptr = (unsigned long)inode_item;
1512 ptr += offsetof(struct btrfs_inode_item, ctime);
1513 return (struct btrfs_timespec *)ptr;
1516 static inline struct btrfs_timespec *
1517 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1519 unsigned long ptr = (unsigned long)inode_item;
1520 ptr += offsetof(struct btrfs_inode_item, otime);
1521 return (struct btrfs_timespec *)ptr;
1524 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1525 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1526 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1528 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1531 /* struct btrfs_dev_extent */
1532 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1534 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1535 chunk_objectid, 64);
1536 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1538 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1540 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1543 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1545 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1546 return (u8 *)((unsigned long)dev + ptr);
1550 /* struct btrfs_extent_item */
1551 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1552 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1553 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1555 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1556 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1558 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1560 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1562 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1563 struct btrfs_tree_block_info *item,
1564 struct btrfs_disk_key *key)
1566 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1569 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1570 struct btrfs_tree_block_info *item,
1571 struct btrfs_disk_key *key)
1573 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1576 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1578 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1580 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1582 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1585 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1588 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1590 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1592 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1593 struct btrfs_extent_inline_ref, type, 8);
1594 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1595 struct btrfs_extent_inline_ref, offset, 64);
1597 static inline u32 btrfs_extent_inline_ref_size(int type)
1599 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1600 type == BTRFS_SHARED_BLOCK_REF_KEY)
1601 return sizeof(struct btrfs_extent_inline_ref);
1602 if (type == BTRFS_SHARED_DATA_REF_KEY)
1603 return sizeof(struct btrfs_shared_data_ref) +
1604 sizeof(struct btrfs_extent_inline_ref);
1605 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1606 return sizeof(struct btrfs_extent_data_ref) +
1607 offsetof(struct btrfs_extent_inline_ref, offset);
1612 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1613 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1615 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1616 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1618 /* struct btrfs_node */
1619 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1620 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1622 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1625 ptr = offsetof(struct btrfs_node, ptrs) +
1626 sizeof(struct btrfs_key_ptr) * nr;
1627 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1630 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1634 ptr = offsetof(struct btrfs_node, ptrs) +
1635 sizeof(struct btrfs_key_ptr) * nr;
1636 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1639 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1642 ptr = offsetof(struct btrfs_node, ptrs) +
1643 sizeof(struct btrfs_key_ptr) * nr;
1644 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1647 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1651 ptr = offsetof(struct btrfs_node, ptrs) +
1652 sizeof(struct btrfs_key_ptr) * nr;
1653 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1656 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1658 return offsetof(struct btrfs_node, ptrs) +
1659 sizeof(struct btrfs_key_ptr) * nr;
1662 static inline void btrfs_node_key(struct extent_buffer *eb,
1663 struct btrfs_disk_key *disk_key, int nr)
1666 ptr = btrfs_node_key_ptr_offset(nr);
1667 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1668 struct btrfs_key_ptr, key, disk_key);
1671 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1672 struct btrfs_disk_key *disk_key, int nr)
1675 ptr = btrfs_node_key_ptr_offset(nr);
1676 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1677 struct btrfs_key_ptr, key, disk_key);
1680 /* struct btrfs_item */
1681 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1682 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1684 static inline unsigned long btrfs_item_nr_offset(int nr)
1686 return offsetof(struct btrfs_leaf, items) +
1687 sizeof(struct btrfs_item) * nr;
1690 static inline struct btrfs_item *btrfs_item_nr(int nr)
1692 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1695 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1696 struct btrfs_item *item)
1698 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1701 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1703 return btrfs_item_end(eb, btrfs_item_nr(nr));
1706 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1708 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1711 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1713 return btrfs_item_size(eb, btrfs_item_nr(nr));
1716 static inline void btrfs_item_key(struct extent_buffer *eb,
1717 struct btrfs_disk_key *disk_key, int nr)
1719 struct btrfs_item *item = btrfs_item_nr(nr);
1720 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1723 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1724 struct btrfs_disk_key *disk_key, int nr)
1726 struct btrfs_item *item = btrfs_item_nr(nr);
1727 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1730 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1733 * struct btrfs_root_ref
1735 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1736 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1737 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1739 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1740 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1743 /* struct btrfs_dir_item */
1744 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1745 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1746 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1747 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1749 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1750 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1751 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1752 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1754 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1755 struct btrfs_dir_item *item,
1756 struct btrfs_disk_key *key)
1758 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1761 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1762 struct btrfs_dir_item *item,
1763 struct btrfs_disk_key *key)
1765 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1768 /* struct btrfs_free_space_header */
1769 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1771 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1773 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1776 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1777 struct btrfs_free_space_header *h,
1778 struct btrfs_disk_key *key)
1780 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1783 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1784 struct btrfs_free_space_header *h,
1785 struct btrfs_disk_key *key)
1787 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1790 /* struct btrfs_disk_key */
1791 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1793 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1794 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1796 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1797 struct btrfs_disk_key *disk)
1799 cpu->offset = le64_to_cpu(disk->offset);
1800 cpu->type = disk->type;
1801 cpu->objectid = le64_to_cpu(disk->objectid);
1804 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1805 struct btrfs_key *cpu)
1807 disk->offset = cpu_to_le64(cpu->offset);
1808 disk->type = cpu->type;
1809 disk->objectid = cpu_to_le64(cpu->objectid);
1812 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1813 struct btrfs_key *key, int nr)
1815 struct btrfs_disk_key disk_key;
1816 btrfs_node_key(eb, &disk_key, nr);
1817 btrfs_disk_key_to_cpu(key, &disk_key);
1820 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1821 struct btrfs_key *key, int nr)
1823 struct btrfs_disk_key disk_key;
1824 btrfs_item_key(eb, &disk_key, nr);
1825 btrfs_disk_key_to_cpu(key, &disk_key);
1828 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1829 struct btrfs_dir_item *item,
1830 struct btrfs_key *key)
1832 struct btrfs_disk_key disk_key;
1833 btrfs_dir_item_key(eb, item, &disk_key);
1834 btrfs_disk_key_to_cpu(key, &disk_key);
1838 static inline u8 btrfs_key_type(struct btrfs_key *key)
1843 /* struct btrfs_header */
1844 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1845 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1847 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1848 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1849 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1850 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1851 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1852 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1854 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1855 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1858 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1860 return (btrfs_header_flags(eb) & flag) == flag;
1863 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1865 u64 flags = btrfs_header_flags(eb);
1866 btrfs_set_header_flags(eb, flags | flag);
1867 return (flags & flag) == flag;
1870 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1872 u64 flags = btrfs_header_flags(eb);
1873 btrfs_set_header_flags(eb, flags & ~flag);
1874 return (flags & flag) == flag;
1877 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1879 u64 flags = btrfs_header_flags(eb);
1880 return flags >> BTRFS_BACKREF_REV_SHIFT;
1883 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1886 u64 flags = btrfs_header_flags(eb);
1887 flags &= ~BTRFS_BACKREF_REV_MASK;
1888 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1889 btrfs_set_header_flags(eb, flags);
1892 static inline unsigned long btrfs_header_fsid(void)
1894 return offsetof(struct btrfs_header, fsid);
1897 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1899 return offsetof(struct btrfs_header, chunk_tree_uuid);
1902 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1904 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1908 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1910 unsigned long ptr = offsetof(struct btrfs_header, csum);
1914 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1919 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1924 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1929 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1931 return (btrfs_header_level(eb) == 0);
1934 /* struct btrfs_root_item */
1935 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1937 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1938 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1939 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1941 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1943 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1944 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1945 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1946 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1947 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1948 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1949 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1950 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1952 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1954 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1956 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1958 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1960 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1963 /* struct btrfs_root_backup */
1964 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1966 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1968 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1969 tree_root_level, 8);
1971 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1973 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1974 chunk_root_gen, 64);
1975 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1976 chunk_root_level, 8);
1978 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1980 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1981 extent_root_gen, 64);
1982 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1983 extent_root_level, 8);
1985 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1987 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1989 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1992 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1994 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1996 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1999 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2001 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2003 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2004 csum_root_level, 8);
2005 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2009 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2012 /* struct btrfs_super_block */
2014 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2015 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2016 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2018 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2020 struct btrfs_super_block, sys_chunk_array_size, 32);
2021 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2022 struct btrfs_super_block, chunk_root_generation, 64);
2023 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2025 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2027 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2028 chunk_root_level, 8);
2029 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2031 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2032 log_root_transid, 64);
2033 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2035 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2037 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2039 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2041 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2043 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2045 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2047 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2048 root_dir_objectid, 64);
2049 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2051 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2053 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2054 compat_ro_flags, 64);
2055 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2056 incompat_flags, 64);
2057 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2059 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2060 cache_generation, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2062 uuid_tree_generation, 64);
2063 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2065 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2067 int t = btrfs_super_csum_type(s);
2068 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2069 return btrfs_csum_sizes[t];
2072 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2074 return offsetof(struct btrfs_leaf, items);
2077 /* struct btrfs_file_extent_item */
2078 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2079 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2081 static inline unsigned long btrfs_file_extent_inline_start(struct
2082 btrfs_file_extent_item *e)
2084 unsigned long offset = (unsigned long)e;
2085 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2089 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2091 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2094 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2096 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2098 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2100 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2102 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2103 disk_num_bytes, 64);
2104 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2106 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2108 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2110 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2112 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2114 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2116 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2118 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2120 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2122 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2123 other_encoding, 16);
2125 /* btrfs_qgroup_status_item */
2126 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2128 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2130 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2132 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2135 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2136 struct btrfs_qgroup_status_item, version, 64);
2137 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2138 struct btrfs_qgroup_status_item, generation, 64);
2139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2140 struct btrfs_qgroup_status_item, flags, 64);
2141 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2142 struct btrfs_qgroup_status_item, rescan, 64);
2144 /* btrfs_qgroup_info_item */
2145 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2147 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2149 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2150 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2151 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2153 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2154 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2156 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2157 struct btrfs_qgroup_info_item, generation, 64);
2158 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2159 struct btrfs_qgroup_info_item, referenced, 64);
2160 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2161 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2162 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2163 struct btrfs_qgroup_info_item, exclusive, 64);
2164 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2165 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2167 /* btrfs_qgroup_limit_item */
2168 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2170 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2171 max_referenced, 64);
2172 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2174 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2175 rsv_referenced, 64);
2176 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2179 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2180 struct btrfs_qgroup_limit_item, flags, 64);
2181 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2182 struct btrfs_qgroup_limit_item, max_referenced, 64);
2183 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2184 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2185 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2186 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2188 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2191 * this returns the number of bytes used by the item on disk, minus the
2192 * size of any extent headers. If a file is compressed on disk, this is
2193 * the compressed size
2195 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2196 struct btrfs_item *e)
2198 unsigned long offset;
2199 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2200 return btrfs_item_size(eb, e) - offset;
2203 /* struct btrfs_ioctl_search_header */
2204 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2206 return get_unaligned_64(&sh->transid);
2209 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2211 return get_unaligned_64(&sh->objectid);
2214 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2216 return get_unaligned_64(&sh->offset);
2219 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2221 return get_unaligned_32(&sh->type);
2224 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2226 return get_unaligned_32(&sh->len);
2229 /* this returns the number of file bytes represented by the inline item.
2230 * If an item is compressed, this is the uncompressed size
2232 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2234 struct btrfs_file_extent_item *fi)
2237 * return the space used on disk if this item isn't
2238 * compressed or encoded
2240 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2241 btrfs_file_extent_encryption(eb, fi) == 0 &&
2242 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2243 return btrfs_file_extent_inline_item_len(eb,
2244 btrfs_item_nr(slot));
2247 /* otherwise use the ram bytes field */
2248 return btrfs_file_extent_ram_bytes(eb, fi);
2252 * NOTE: Backward compatibility, do not use.
2253 * Replacement: read nodesize directly
2255 __attribute__((deprecated))
2256 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2258 return root->leafsize;
2259 return root->nodesize;
2262 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2264 struct btrfs_super_block *disk_super;
2265 disk_super = fs_info->super_copy;
2266 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2269 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2271 struct btrfs_super_block *disk_super;
2272 disk_super = fs_info->super_copy;
2273 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2276 /* helper function to cast into the data area of the leaf. */
2277 #define btrfs_item_ptr(leaf, slot, type) \
2278 ((type *)(btrfs_leaf_data(leaf) + \
2279 btrfs_item_offset_nr(leaf, slot)))
2281 #define btrfs_item_ptr_offset(leaf, slot) \
2282 ((unsigned long)(btrfs_leaf_data(leaf) + \
2283 btrfs_item_offset_nr(leaf, slot)))
2286 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2287 struct btrfs_root *root,
2288 u64 num_bytes, u64 empty_size,
2289 u64 hint_byte, u64 search_end,
2290 struct btrfs_key *ins, int data);
2291 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2292 struct btrfs_root *root);
2293 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2294 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2295 u64 bytenr, u64 num_bytes);
2296 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2297 struct btrfs_root *root);
2298 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2299 btrfs_fs_info *info,
2301 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2302 btrfs_fs_info *info,
2304 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2305 struct btrfs_root *root,
2306 u32 blocksize, u64 root_objectid,
2307 struct btrfs_disk_key *key, int level,
2308 u64 hint, u64 empty_size);
2309 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *root,
2311 u64 num_bytes, u64 parent,
2312 u64 root_objectid, u64 ref_generation,
2313 u64 owner, u64 empty_size, u64 hint_byte,
2314 u64 search_end, struct btrfs_key *ins, int data);
2315 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2316 struct btrfs_root *root, u64 bytenr,
2317 u64 offset, int metadata, u64 *refs, u64 *flags);
2318 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2319 struct btrfs_root *root,
2320 u64 bytenr, int level, u64 flags);
2321 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2322 struct extent_buffer *buf, int record_parent);
2323 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2324 struct extent_buffer *buf, int record_parent);
2325 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2326 struct btrfs_root *root,
2327 u64 bytenr, u64 num_bytes, u64 parent,
2328 u64 root_objectid, u64 owner, u64 offset);
2329 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2330 struct btrfs_root *root,
2331 struct extent_io_tree *unpin);
2332 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2333 struct btrfs_root *root,
2334 u64 bytenr, u64 num_bytes, u64 parent,
2335 u64 root_objectid, u64 ref_generation,
2336 u64 owner_objectid);
2337 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2338 struct btrfs_root *root, u64 bytenr,
2339 u64 orig_parent, u64 parent,
2340 u64 root_objectid, u64 ref_generation,
2341 u64 owner_objectid);
2342 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2343 struct btrfs_root *root);
2344 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2345 int btrfs_read_block_groups(struct btrfs_root *root);
2346 struct btrfs_block_group_cache *
2347 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2348 u64 chunk_objectid, u64 chunk_offset, u64 size);
2349 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2350 struct btrfs_root *root, u64 bytes_used,
2351 u64 type, u64 chunk_objectid, u64 chunk_offset,
2353 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2354 struct btrfs_root *root);
2355 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root, u64 bytenr, u64 num,
2357 int alloc, int mark_free);
2358 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2359 struct btrfs_root *root, u64 objectid,
2360 struct btrfs_inode_item *inode,
2361 u64 file_pos, u64 disk_bytenr,
2363 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2364 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2365 void free_excluded_extents(struct btrfs_root *root,
2366 struct btrfs_block_group_cache *cache);
2367 int exclude_super_stripes(struct btrfs_root *root,
2368 struct btrfs_block_group_cache *cache);
2369 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2370 struct btrfs_fs_info *info, u64 start, u64 end);
2371 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2374 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2375 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2376 struct btrfs_path *path, int level, int slot);
2377 enum btrfs_tree_block_status
2378 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2379 struct extent_buffer *buf);
2380 enum btrfs_tree_block_status
2381 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2382 struct extent_buffer *buf);
2383 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2384 int level, int slot, u64 objectid);
2385 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2386 struct extent_buffer *parent, int slot);
2387 int btrfs_previous_item(struct btrfs_root *root,
2388 struct btrfs_path *path, u64 min_objectid,
2390 int btrfs_previous_extent_item(struct btrfs_root *root,
2391 struct btrfs_path *path, u64 min_objectid);
2392 int btrfs_next_extent_item(struct btrfs_root *root,
2393 struct btrfs_path *path, u64 max_objectid);
2394 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2395 struct btrfs_root *root, struct extent_buffer *buf,
2396 struct extent_buffer *parent, int parent_slot,
2397 struct extent_buffer **cow_ret);
2398 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2399 struct btrfs_root *root,
2400 struct extent_buffer *buf,
2401 struct extent_buffer *parent, int parent_slot,
2402 struct extent_buffer **cow_ret,
2403 u64 search_start, u64 empty_size);
2404 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2405 struct btrfs_root *root,
2406 struct extent_buffer *buf,
2407 struct extent_buffer **cow_ret, u64 new_root_objectid);
2408 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2409 *root, struct btrfs_path *path, u32 data_size);
2410 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2411 struct btrfs_root *root,
2412 struct btrfs_path *path,
2413 u32 new_size, int from_end);
2414 int btrfs_split_item(struct btrfs_trans_handle *trans,
2415 struct btrfs_root *root,
2416 struct btrfs_path *path,
2417 struct btrfs_key *new_key,
2418 unsigned long split_offset);
2419 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2420 *root, struct btrfs_key *key, struct btrfs_path *p, int
2422 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2423 u64 iobjectid, u64 ioff, u8 key_type,
2424 struct btrfs_key *found_key);
2425 void btrfs_release_path(struct btrfs_path *p);
2426 void add_root_to_dirty_list(struct btrfs_root *root);
2427 struct btrfs_path *btrfs_alloc_path(void);
2428 void btrfs_free_path(struct btrfs_path *p);
2429 void btrfs_init_path(struct btrfs_path *p);
2430 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2431 struct btrfs_path *path, int slot, int nr);
2433 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2434 struct btrfs_root *root,
2435 struct btrfs_path *path)
2437 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2440 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2441 *root, struct btrfs_key *key, void *data, u32 data_size);
2442 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2443 struct btrfs_root *root,
2444 struct btrfs_path *path,
2445 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2447 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2448 struct btrfs_root *root,
2449 struct btrfs_path *path,
2450 struct btrfs_key *key,
2453 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2456 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2457 static inline int btrfs_next_item(struct btrfs_root *root,
2458 struct btrfs_path *p)
2461 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2462 return btrfs_next_leaf(root, p);
2466 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2467 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2468 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2469 struct btrfs_disk_key *key, int level);
2470 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2471 struct btrfs_key *new_key);
2472 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2473 struct btrfs_path *path,
2474 struct btrfs_key *new_key);
2477 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2478 struct btrfs_root *tree_root,
2479 u64 root_id, u8 type, u64 ref_id,
2480 u64 dirid, u64 sequence,
2481 const char *name, int name_len);
2482 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2483 *root, struct btrfs_key *key, struct btrfs_root_item
2485 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2486 *root, struct btrfs_key *key, struct btrfs_root_item
2488 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2489 btrfs_root_item *item, struct btrfs_key *key);
2491 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2492 *root, const char *name, int name_len, u64 dir,
2493 struct btrfs_key *location, u8 type, u64 index);
2494 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2495 struct btrfs_root *root,
2496 struct btrfs_path *path, u64 dir,
2497 const char *name, int name_len,
2499 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root,
2501 struct btrfs_path *path, u64 dir,
2502 const char *name, int name_len,
2503 u64 index, int mod);
2504 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2505 struct btrfs_root *root,
2506 struct btrfs_path *path,
2507 struct btrfs_dir_item *di);
2508 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2509 struct btrfs_root *root, const char *name,
2510 u16 name_len, const void *data, u16 data_len,
2513 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2514 struct btrfs_root *fs_root,
2515 u64 dirid, u64 *objectid);
2518 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2519 struct btrfs_root *root,
2520 const char *name, int name_len,
2521 u64 inode_objectid, u64 ref_objectid, u64 index);
2522 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2523 *root, u64 objectid, struct btrfs_inode_item
2525 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2526 *root, struct btrfs_path *path,
2527 struct btrfs_key *location, int mod);
2528 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2529 *trans, struct btrfs_path *path, struct btrfs_root *root,
2530 u64 ino, u64 parent_ino, u64 index, const char *name,
2531 int namelen, int ins_len);
2532 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2533 struct btrfs_root *root,
2534 const char *name, int name_len,
2535 u64 inode_objectid, u64 ref_objectid,
2537 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2538 struct btrfs_root *root,
2539 const char *name, int name_len,
2540 u64 inode_objectid, u64 ref_objectid, u64 index);
2541 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2542 struct btrfs_root *root, struct btrfs_path *path,
2543 const char *name, int namelen, u64 ino, u64 parent_ino,
2544 u64 index, int ins_len);
2545 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2546 struct btrfs_root *root, const char *name, int name_len,
2547 u64 ino, u64 parent_ino, u64 *index);
2550 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2551 struct btrfs_root *root, u64 bytenr, u64 len);
2552 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2553 struct btrfs_root *root,
2554 u64 objectid, u64 pos, u64 offset,
2557 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2558 struct btrfs_root *root, u64 objectid,
2559 u64 offset, char *buffer, size_t size);
2560 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2561 struct btrfs_root *root, u64 alloc_end,
2562 u64 bytenr, char *data, size_t len);
2563 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2564 struct btrfs_root *root, struct btrfs_path *path,
2568 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2569 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2572 static inline int is_fstree(u64 rootid)
2574 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2575 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2581 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2582 u64 dir, u64 index);
2583 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2585 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2586 struct btrfs_root *root, u64 ino, u64 flags);
2587 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2588 u64 ino, u64 parent_ino, char *name, int namelen,
2589 u8 type, u64 *index, int add_backref);
2590 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2591 u64 ino, u64 parent_ino, u64 index, const char *name,
2592 int namelen, int add_orphan);
2593 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2594 struct btrfs_root *root, struct btrfs_path *path,
2596 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2597 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2600 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2601 struct btrfs_root *root,
2602 struct btrfs_path *path,
2603 u64 ino, u64 offset, u64 len, int ins_len);
2604 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2605 struct btrfs_root *root,
2606 u64 ino, u64 offset, u64 len);