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 \
494 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
496 #define BTRFS_FEATURE_INCOMPAT_SUPP \
497 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
498 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
499 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
500 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
501 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
502 BTRFS_FEATURE_INCOMPAT_RAID56 | \
503 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
504 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
505 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
508 * A leaf is full of items. offset and size tell us where to find
509 * the item in the leaf (relative to the start of the data area)
512 struct btrfs_disk_key key;
515 } __attribute__ ((__packed__));
518 * leaves have an item area and a data area:
519 * [item0, item1....itemN] [free space] [dataN...data1, data0]
521 * The data is separate from the items to get the keys closer together
525 struct btrfs_header header;
526 struct btrfs_item items[];
527 } __attribute__ ((__packed__));
530 * all non-leaf blocks are nodes, they hold only keys and pointers to
533 struct btrfs_key_ptr {
534 struct btrfs_disk_key key;
537 } __attribute__ ((__packed__));
540 struct btrfs_header header;
541 struct btrfs_key_ptr ptrs[];
542 } __attribute__ ((__packed__));
545 * btrfs_paths remember the path taken from the root down to the leaf.
546 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
547 * to any other levels that are present.
549 * The slots array records the index of the item or block pointer
550 * used while walking the tree.
554 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
555 int slots[BTRFS_MAX_LEVEL];
556 /* if there is real range locking, this locks field will change */
557 int locks[BTRFS_MAX_LEVEL];
559 /* keep some upper locks as we walk down */
563 * set by btrfs_split_item, tells search_slot to keep all locks
564 * and to force calls to keep space in the nodes
566 unsigned int search_for_split:1;
567 unsigned int skip_check_block:1;
571 * items in the extent btree are used to record the objectid of the
572 * owner of the block and the number of references
575 struct btrfs_extent_item {
579 } __attribute__ ((__packed__));
581 struct btrfs_extent_item_v0 {
583 } __attribute__ ((__packed__));
585 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
586 sizeof(struct btrfs_item))
587 #define BTRFS_MAX_EXTENT_SIZE (128 * 1024 * 1024)
589 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
590 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
592 /* following flags only apply to tree blocks */
594 /* use full backrefs for extent pointers in the block*/
595 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
597 struct btrfs_tree_block_info {
598 struct btrfs_disk_key key;
600 } __attribute__ ((__packed__));
602 struct btrfs_extent_data_ref {
607 } __attribute__ ((__packed__));
609 struct btrfs_shared_data_ref {
611 } __attribute__ ((__packed__));
613 struct btrfs_extent_inline_ref {
616 } __attribute__ ((__packed__));
618 struct btrfs_extent_ref_v0 {
623 } __attribute__ ((__packed__));
625 /* dev extents record free space on individual devices. The owner
626 * field points back to the chunk allocation mapping tree that allocated
627 * the extent. The chunk tree uuid field is a way to double check the owner
629 struct btrfs_dev_extent {
631 __le64 chunk_objectid;
634 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
635 } __attribute__ ((__packed__));
637 struct btrfs_inode_ref {
641 } __attribute__ ((__packed__));
643 struct btrfs_inode_extref {
644 __le64 parent_objectid;
647 __u8 name[0]; /* name goes here */
648 } __attribute__ ((__packed__));
650 struct btrfs_timespec {
653 } __attribute__ ((__packed__));
656 BTRFS_COMPRESS_NONE = 0,
657 BTRFS_COMPRESS_ZLIB = 1,
658 BTRFS_COMPRESS_LZO = 2,
659 BTRFS_COMPRESS_TYPES = 2,
660 BTRFS_COMPRESS_LAST = 3,
661 } btrfs_compression_type;
663 /* we don't understand any encryption methods right now */
665 BTRFS_ENCRYPTION_NONE = 0,
666 BTRFS_ENCRYPTION_LAST = 1,
667 } btrfs_encryption_type;
669 enum btrfs_tree_block_status {
670 BTRFS_TREE_BLOCK_CLEAN,
671 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
672 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
673 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
674 BTRFS_TREE_BLOCK_INVALID_LEVEL,
675 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
676 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
679 struct btrfs_inode_item {
680 /* nfs style generation number */
682 /* transid that last touched this inode */
694 /* modification sequence number for NFS */
698 * a little future expansion, for more than this we can
699 * just grow the inode item and version it
702 struct btrfs_timespec atime;
703 struct btrfs_timespec ctime;
704 struct btrfs_timespec mtime;
705 struct btrfs_timespec otime;
706 } __attribute__ ((__packed__));
708 struct btrfs_dir_log_item {
710 } __attribute__ ((__packed__));
712 struct btrfs_dir_item {
713 struct btrfs_disk_key location;
718 } __attribute__ ((__packed__));
720 struct btrfs_root_item_v0 {
721 struct btrfs_inode_item inode;
727 __le64 last_snapshot;
730 struct btrfs_disk_key drop_progress;
733 } __attribute__ ((__packed__));
735 struct btrfs_root_item {
736 struct btrfs_inode_item inode;
742 __le64 last_snapshot;
745 struct btrfs_disk_key drop_progress;
750 * The following fields appear after subvol_uuids+subvol_times
755 * This generation number is used to test if the new fields are valid
756 * and up to date while reading the root item. Every time the root item
757 * is written out, the "generation" field is copied into this field. If
758 * anyone ever mounted the fs with an older kernel, we will have
759 * mismatching generation values here and thus must invalidate the
760 * new fields. See btrfs_update_root and btrfs_find_last_root for
762 * the offset of generation_v2 is also used as the start for the memset
763 * when invalidating the fields.
765 __le64 generation_v2;
766 u8 uuid[BTRFS_UUID_SIZE];
767 u8 parent_uuid[BTRFS_UUID_SIZE];
768 u8 received_uuid[BTRFS_UUID_SIZE];
769 __le64 ctransid; /* updated when an inode changes */
770 __le64 otransid; /* trans when created */
771 __le64 stransid; /* trans when sent. non-zero for received subvol */
772 __le64 rtransid; /* trans when received. non-zero for received subvol */
773 struct btrfs_timespec ctime;
774 struct btrfs_timespec otime;
775 struct btrfs_timespec stime;
776 struct btrfs_timespec rtime;
777 __le64 reserved[8]; /* for future */
778 } __attribute__ ((__packed__));
781 * this is used for both forward and backward root refs
783 struct btrfs_root_ref {
787 } __attribute__ ((__packed__));
789 #define BTRFS_FILE_EXTENT_INLINE 0
790 #define BTRFS_FILE_EXTENT_REG 1
791 #define BTRFS_FILE_EXTENT_PREALLOC 2
793 struct btrfs_file_extent_item {
795 * transaction id that created this extent
799 * max number of bytes to hold this extent in ram
800 * when we split a compressed extent we can't know how big
801 * each of the resulting pieces will be. So, this is
802 * an upper limit on the size of the extent in ram instead of
808 * 32 bits for the various ways we might encode the data,
809 * including compression and encryption. If any of these
810 * are set to something a given disk format doesn't understand
811 * it is treated like an incompat flag for reading and writing,
816 __le16 other_encoding; /* spare for later use */
818 /* are we inline data or a real extent? */
822 * disk space consumed by the extent, checksum blocks are included
826 __le64 disk_num_bytes;
828 * the logical offset in file blocks (no csums)
829 * this extent record is for. This allows a file extent to point
830 * into the middle of an existing extent on disk, sharing it
831 * between two snapshots (useful if some bytes in the middle of the
832 * extent have changed
836 * the logical number of file blocks (no csums included)
840 } __attribute__ ((__packed__));
842 struct btrfs_csum_item {
844 } __attribute__ ((__packed__));
847 * We don't want to overwrite 1M at the beginning of device, even though
848 * there is our 1st superblock at 64k. Some possible reasons:
849 * - the first 64k blank is useful for some boot loader/manager
850 * - the first 1M could be scratched by buggy partitioner or somesuch
852 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
854 /* tag for the radix tree of block groups in ram */
855 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
856 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
857 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
858 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
859 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
860 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
861 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
862 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
863 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
864 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
865 #define BTRFS_NR_RAID_TYPES 7
867 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
868 BTRFS_BLOCK_GROUP_SYSTEM | \
869 BTRFS_BLOCK_GROUP_METADATA)
871 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
872 BTRFS_BLOCK_GROUP_RAID1 | \
873 BTRFS_BLOCK_GROUP_RAID5 | \
874 BTRFS_BLOCK_GROUP_RAID6 | \
875 BTRFS_BLOCK_GROUP_DUP | \
876 BTRFS_BLOCK_GROUP_RAID10)
878 /* used in struct btrfs_balance_args fields */
879 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
882 * GLOBAL_RSV does not exist as a on-disk block group type and is used
883 * internally for exporting info about global block reserve from space infos
885 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
887 #define BTRFS_QGROUP_LEVEL_SHIFT 48
889 static inline u64 btrfs_qgroup_level(u64 qgroupid)
891 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
894 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
896 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
899 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
900 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
901 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
903 struct btrfs_qgroup_status_item {
907 __le64 rescan; /* progress during scanning */
908 } __attribute__ ((__packed__));
910 struct btrfs_block_group_item {
912 __le64 chunk_objectid;
914 } __attribute__ ((__packed__));
916 struct btrfs_free_space_info {
919 } __attribute__ ((__packed__));
921 #define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
923 struct btrfs_qgroup_info_item {
926 __le64 referenced_compressed;
928 __le64 exclusive_compressed;
929 } __attribute__ ((__packed__));
931 /* flags definition for qgroup limits */
932 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
933 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
934 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
935 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
936 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
937 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
939 struct btrfs_qgroup_limit_item {
941 __le64 max_referenced;
942 __le64 max_exclusive;
943 __le64 rsv_referenced;
944 __le64 rsv_exclusive;
945 } __attribute__ ((__packed__));
947 struct btrfs_space_info {
953 struct list_head list;
956 struct btrfs_block_group_cache {
957 struct cache_extent cache;
958 struct btrfs_key key;
959 struct btrfs_block_group_item item;
960 struct btrfs_space_info *space_info;
961 struct btrfs_free_space_ctl *free_space_ctl;
970 struct btrfs_fs_devices;
971 struct btrfs_fs_info {
972 u8 fsid[BTRFS_FSID_SIZE];
974 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
975 u8 *new_chunk_tree_uuid;
976 struct btrfs_root *fs_root;
977 struct btrfs_root *extent_root;
978 struct btrfs_root *tree_root;
979 struct btrfs_root *chunk_root;
980 struct btrfs_root *dev_root;
981 struct btrfs_root *csum_root;
982 struct btrfs_root *quota_root;
983 struct btrfs_root *free_space_root;
985 struct rb_root fs_root_tree;
987 /* the log root tree is a directory of all the other log roots */
988 struct btrfs_root *log_root_tree;
990 struct extent_io_tree extent_cache;
991 struct extent_io_tree free_space_cache;
992 struct extent_io_tree block_group_cache;
993 struct extent_io_tree pinned_extents;
994 struct extent_io_tree pending_del;
995 struct extent_io_tree extent_ins;
996 struct extent_io_tree *excluded_extents;
998 /* logical->physical extent mapping */
999 struct btrfs_mapping_tree mapping_tree;
1002 u64 last_trans_committed;
1004 u64 avail_data_alloc_bits;
1005 u64 avail_metadata_alloc_bits;
1006 u64 avail_system_alloc_bits;
1007 u64 data_alloc_profile;
1008 u64 metadata_alloc_profile;
1009 u64 system_alloc_profile;
1012 struct btrfs_trans_handle *running_transaction;
1013 struct btrfs_super_block *super_copy;
1014 struct mutex fs_mutex;
1019 struct list_head dirty_cowonly_roots;
1020 struct list_head recow_ebs;
1022 struct btrfs_fs_devices *fs_devices;
1023 struct list_head space_info;
1026 unsigned int readonly:1;
1027 unsigned int on_restoring:1;
1028 unsigned int is_chunk_recover:1;
1029 unsigned int quota_enabled:1;
1030 unsigned int suppress_check_block_errors:1;
1031 unsigned int ignore_fsid_mismatch:1;
1032 unsigned int ignore_chunk_tree_error:1;
1033 unsigned int avoid_meta_chunk_alloc:1;
1034 unsigned int avoid_sys_chunk_alloc:1;
1035 unsigned int finalize_on_close:1;
1037 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1038 struct btrfs_root *root,
1039 u64 bytenr, u64 num_bytes, u64 parent,
1040 u64 root_objectid, u64 owner, u64 offset,
1042 struct cache_tree *fsck_extent_cache;
1043 struct cache_tree *corrupt_blocks;
1048 * in ram representation of the tree. extent_root is used for all allocations
1049 * and for the extent tree extent_root root.
1052 struct extent_buffer *node;
1053 struct extent_buffer *commit_root;
1054 struct btrfs_root_item root_item;
1055 struct btrfs_key root_key;
1056 struct btrfs_fs_info *fs_info;
1060 /* data allocations are done in sectorsize units */
1063 /* node allocations are done in nodesize units */
1066 /* Unused, equal to nodesize */
1069 /* leaf allocations are done in nodesize units */
1078 u64 last_inode_alloc;
1081 * Record orphan data extent ref
1083 * TODO: Don't restore things in btrfs_root.
1084 * Directly record it into inode_record, which needs a lot of
1085 * infrastructure change to allow cooperation between extent
1088 struct list_head orphan_data_extents;
1090 /* the dirty list is only used by non-reference counted roots */
1091 struct list_head dirty_list;
1092 struct rb_node rb_node;
1096 * inode items have the data typically returned from stat and store other
1097 * info about object characteristics. There is one for every file and dir in
1100 #define BTRFS_INODE_ITEM_KEY 1
1101 #define BTRFS_INODE_REF_KEY 12
1102 #define BTRFS_INODE_EXTREF_KEY 13
1103 #define BTRFS_XATTR_ITEM_KEY 24
1104 #define BTRFS_ORPHAN_ITEM_KEY 48
1106 #define BTRFS_DIR_LOG_ITEM_KEY 60
1107 #define BTRFS_DIR_LOG_INDEX_KEY 72
1109 * dir items are the name -> inode pointers in a directory. There is one
1110 * for every name in a directory.
1112 #define BTRFS_DIR_ITEM_KEY 84
1113 #define BTRFS_DIR_INDEX_KEY 96
1116 * extent data is for file data
1118 #define BTRFS_EXTENT_DATA_KEY 108
1121 * csum items have the checksums for data in the extents
1123 #define BTRFS_CSUM_ITEM_KEY 120
1125 * extent csums are stored in a separate tree and hold csums for
1126 * an entire extent on disk.
1128 #define BTRFS_EXTENT_CSUM_KEY 128
1131 * root items point to tree roots. There are typically in the root
1132 * tree used by the super block to find all the other trees
1134 #define BTRFS_ROOT_ITEM_KEY 132
1137 * root backrefs tie subvols and snapshots to the directory entries that
1140 #define BTRFS_ROOT_BACKREF_KEY 144
1143 * root refs make a fast index for listing all of the snapshots and
1144 * subvolumes referenced by a given root. They point directly to the
1145 * directory item in the root that references the subvol
1147 #define BTRFS_ROOT_REF_KEY 156
1150 * extent items are in the extent map tree. These record which blocks
1151 * are used, and how many references there are to each block
1153 #define BTRFS_EXTENT_ITEM_KEY 168
1156 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1157 * the length, so we save the level in key->offset instead of the length.
1159 #define BTRFS_METADATA_ITEM_KEY 169
1161 #define BTRFS_TREE_BLOCK_REF_KEY 176
1163 #define BTRFS_EXTENT_DATA_REF_KEY 178
1165 /* old style extent backrefs */
1166 #define BTRFS_EXTENT_REF_V0_KEY 180
1168 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1170 #define BTRFS_SHARED_DATA_REF_KEY 184
1174 * block groups give us hints into the extent allocation trees. Which
1175 * blocks are free etc etc
1177 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1180 * Every block group is represented in the free space tree by a free space info
1181 * item, which stores some accounting information. It is keyed on
1182 * (block_group_start, FREE_SPACE_INFO, block_group_length).
1184 #define BTRFS_FREE_SPACE_INFO_KEY 198
1187 * A free space extent tracks an extent of space that is free in a block group.
1188 * It is keyed on (start, FREE_SPACE_EXTENT, length).
1190 #define BTRFS_FREE_SPACE_EXTENT_KEY 199
1193 * When a block group becomes very fragmented, we convert it to use bitmaps
1194 * instead of extents. A free space bitmap is keyed on
1195 * (start, FREE_SPACE_BITMAP, length); the corresponding item is a bitmap with
1196 * (length / sectorsize) bits.
1198 #define BTRFS_FREE_SPACE_BITMAP_KEY 200
1200 #define BTRFS_DEV_EXTENT_KEY 204
1201 #define BTRFS_DEV_ITEM_KEY 216
1202 #define BTRFS_CHUNK_ITEM_KEY 228
1204 #define BTRFS_BALANCE_ITEM_KEY 248
1209 #define BTRFS_QGROUP_STATUS_KEY 240
1210 #define BTRFS_QGROUP_INFO_KEY 242
1211 #define BTRFS_QGROUP_LIMIT_KEY 244
1212 #define BTRFS_QGROUP_RELATION_KEY 246
1215 * Persistently stores the io stats in the device tree.
1216 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1218 #define BTRFS_DEV_STATS_KEY 249
1221 * Persistently stores the device replace state in the device tree.
1222 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1224 #define BTRFS_DEV_REPLACE_KEY 250
1227 * Stores items that allow to quickly map UUIDs to something else.
1228 * These items are part of the filesystem UUID tree.
1229 * The key is built like this:
1230 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1232 #if BTRFS_UUID_SIZE != 16
1233 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1235 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1236 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1237 * received subvols */
1240 * string items are for debugging. They just store a short string of
1243 #define BTRFS_STRING_ITEM_KEY 253
1247 #define BTRFS_INODE_NODATASUM (1 << 0)
1248 #define BTRFS_INODE_NODATACOW (1 << 1)
1249 #define BTRFS_INODE_READONLY (1 << 2)
1251 #define read_eb_member(eb, ptr, type, member, result) ( \
1252 read_extent_buffer(eb, (char *)(result), \
1253 ((unsigned long)(ptr)) + \
1254 offsetof(type, member), \
1255 sizeof(((type *)0)->member)))
1257 #define write_eb_member(eb, ptr, type, member, result) ( \
1258 write_extent_buffer(eb, (char *)(result), \
1259 ((unsigned long)(ptr)) + \
1260 offsetof(type, member), \
1261 sizeof(((type *)0)->member)))
1263 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1264 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1266 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1267 return le##bits##_to_cpu(h->member); \
1269 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1272 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1273 h->member = cpu_to_le##bits(val); \
1276 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1277 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1280 unsigned long offset = (unsigned long)s; \
1281 const type *p = (type *) (eb->data + offset); \
1282 return get_unaligned_le##bits(&p->member); \
1284 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1285 type *s, u##bits val) \
1287 unsigned long offset = (unsigned long)s; \
1288 type *p = (type *) (eb->data + offset); \
1289 put_unaligned_le##bits(val, &p->member); \
1292 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1293 static inline u##bits btrfs_##name(const type *s) \
1295 return le##bits##_to_cpu(s->member); \
1297 static inline void btrfs_set_##name(type *s, u##bits val) \
1299 s->member = cpu_to_le##bits(val); \
1302 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1303 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1304 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1305 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1306 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1307 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1309 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1310 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1311 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1312 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1313 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1314 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1316 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1317 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1319 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1321 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1323 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1325 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1327 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1328 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1330 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1332 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1334 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1337 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1339 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1342 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1344 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1347 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1348 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1349 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1350 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1351 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1352 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1353 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1354 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1355 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1356 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1357 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1359 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1361 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1364 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1365 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1366 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1368 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1370 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1372 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1374 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1375 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1377 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1379 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1380 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1382 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1385 unsigned long offset = (unsigned long)c;
1386 offset += offsetof(struct btrfs_chunk, stripe);
1387 offset += nr * sizeof(struct btrfs_stripe);
1388 return (struct btrfs_stripe *)offset;
1391 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1393 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1396 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1397 struct btrfs_chunk *c, int nr)
1399 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1402 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1403 struct btrfs_chunk *c, int nr,
1406 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1409 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1410 struct btrfs_chunk *c, int nr)
1412 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1415 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1416 struct btrfs_chunk *c, int nr,
1419 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1422 /* struct btrfs_block_group_item */
1423 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1425 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1427 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1428 struct btrfs_block_group_item, chunk_objectid, 64);
1430 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1431 struct btrfs_block_group_item, chunk_objectid, 64);
1432 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1433 struct btrfs_block_group_item, flags, 64);
1434 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1435 struct btrfs_block_group_item, flags, 64);
1437 /* struct btrfs_free_space_info */
1438 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
1440 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
1442 /* struct btrfs_inode_ref */
1443 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1444 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1445 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1447 /* struct btrfs_inode_extref */
1448 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1449 parent_objectid, 64);
1450 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1452 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1454 /* struct btrfs_inode_item */
1455 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1456 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1457 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1458 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1459 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1460 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1461 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1462 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1463 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1464 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1465 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1466 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1469 struct btrfs_inode_item, generation, 64);
1470 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1471 struct btrfs_inode_item, sequence, 64);
1472 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid,
1473 struct btrfs_inode_item, transid, 64);
1474 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1475 struct btrfs_inode_item, size, 64);
1476 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1477 struct btrfs_inode_item, nbytes, 64);
1478 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1479 struct btrfs_inode_item, block_group, 64);
1480 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1481 struct btrfs_inode_item, nlink, 32);
1482 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1483 struct btrfs_inode_item, uid, 32);
1484 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1485 struct btrfs_inode_item, gid, 32);
1486 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1487 struct btrfs_inode_item, mode, 32);
1488 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1489 struct btrfs_inode_item, rdev, 64);
1490 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1491 struct btrfs_inode_item, flags, 64);
1493 static inline struct btrfs_timespec *
1494 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1496 unsigned long ptr = (unsigned long)inode_item;
1497 ptr += offsetof(struct btrfs_inode_item, atime);
1498 return (struct btrfs_timespec *)ptr;
1501 static inline struct btrfs_timespec *
1502 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1504 unsigned long ptr = (unsigned long)inode_item;
1505 ptr += offsetof(struct btrfs_inode_item, mtime);
1506 return (struct btrfs_timespec *)ptr;
1509 static inline struct btrfs_timespec *
1510 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1512 unsigned long ptr = (unsigned long)inode_item;
1513 ptr += offsetof(struct btrfs_inode_item, ctime);
1514 return (struct btrfs_timespec *)ptr;
1517 static inline struct btrfs_timespec *
1518 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1520 unsigned long ptr = (unsigned long)inode_item;
1521 ptr += offsetof(struct btrfs_inode_item, otime);
1522 return (struct btrfs_timespec *)ptr;
1525 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1526 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1527 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1529 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1532 /* struct btrfs_dev_extent */
1533 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1535 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1536 chunk_objectid, 64);
1537 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1539 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1541 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1544 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1546 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1547 return (u8 *)((unsigned long)dev + ptr);
1551 /* struct btrfs_extent_item */
1552 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1553 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1554 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1556 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1557 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1559 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1561 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1563 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1564 struct btrfs_tree_block_info *item,
1565 struct btrfs_disk_key *key)
1567 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1570 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1571 struct btrfs_tree_block_info *item,
1572 struct btrfs_disk_key *key)
1574 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1577 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1579 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1581 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1583 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1586 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1589 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1591 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1593 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1594 struct btrfs_extent_inline_ref, type, 8);
1595 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1596 struct btrfs_extent_inline_ref, offset, 64);
1598 static inline u32 btrfs_extent_inline_ref_size(int type)
1600 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1601 type == BTRFS_SHARED_BLOCK_REF_KEY)
1602 return sizeof(struct btrfs_extent_inline_ref);
1603 if (type == BTRFS_SHARED_DATA_REF_KEY)
1604 return sizeof(struct btrfs_shared_data_ref) +
1605 sizeof(struct btrfs_extent_inline_ref);
1606 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1607 return sizeof(struct btrfs_extent_data_ref) +
1608 offsetof(struct btrfs_extent_inline_ref, offset);
1613 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1614 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1616 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1617 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1619 /* struct btrfs_node */
1620 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1621 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1623 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1626 ptr = offsetof(struct btrfs_node, ptrs) +
1627 sizeof(struct btrfs_key_ptr) * nr;
1628 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1631 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1635 ptr = offsetof(struct btrfs_node, ptrs) +
1636 sizeof(struct btrfs_key_ptr) * nr;
1637 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1640 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1643 ptr = offsetof(struct btrfs_node, ptrs) +
1644 sizeof(struct btrfs_key_ptr) * nr;
1645 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1648 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1652 ptr = offsetof(struct btrfs_node, ptrs) +
1653 sizeof(struct btrfs_key_ptr) * nr;
1654 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1657 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1659 return offsetof(struct btrfs_node, ptrs) +
1660 sizeof(struct btrfs_key_ptr) * nr;
1663 static inline void btrfs_node_key(struct extent_buffer *eb,
1664 struct btrfs_disk_key *disk_key, int nr)
1667 ptr = btrfs_node_key_ptr_offset(nr);
1668 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1669 struct btrfs_key_ptr, key, disk_key);
1672 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1673 struct btrfs_disk_key *disk_key, int nr)
1676 ptr = btrfs_node_key_ptr_offset(nr);
1677 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1678 struct btrfs_key_ptr, key, disk_key);
1681 /* struct btrfs_item */
1682 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1683 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1685 static inline unsigned long btrfs_item_nr_offset(int nr)
1687 return offsetof(struct btrfs_leaf, items) +
1688 sizeof(struct btrfs_item) * nr;
1691 static inline struct btrfs_item *btrfs_item_nr(int nr)
1693 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1696 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1697 struct btrfs_item *item)
1699 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1702 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1704 return btrfs_item_end(eb, btrfs_item_nr(nr));
1707 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1709 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1712 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1714 return btrfs_item_size(eb, btrfs_item_nr(nr));
1717 static inline void btrfs_item_key(struct extent_buffer *eb,
1718 struct btrfs_disk_key *disk_key, int nr)
1720 struct btrfs_item *item = btrfs_item_nr(nr);
1721 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1724 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1725 struct btrfs_disk_key *disk_key, int nr)
1727 struct btrfs_item *item = btrfs_item_nr(nr);
1728 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1731 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1734 * struct btrfs_root_ref
1736 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1737 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1738 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1740 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1741 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1742 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1744 /* struct btrfs_dir_item */
1745 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1746 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1747 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1748 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1750 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
1751 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8);
1752 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1753 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
1755 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1756 struct btrfs_dir_item *item,
1757 struct btrfs_disk_key *key)
1759 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1762 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1763 struct btrfs_dir_item *item,
1764 struct btrfs_disk_key *key)
1766 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1769 /* struct btrfs_free_space_header */
1770 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1772 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1774 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1777 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1778 struct btrfs_free_space_header *h,
1779 struct btrfs_disk_key *key)
1781 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1784 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1785 struct btrfs_free_space_header *h,
1786 struct btrfs_disk_key *key)
1788 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1791 /* struct btrfs_disk_key */
1792 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1794 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1795 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1797 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1798 struct btrfs_disk_key *disk)
1800 cpu->offset = le64_to_cpu(disk->offset);
1801 cpu->type = disk->type;
1802 cpu->objectid = le64_to_cpu(disk->objectid);
1805 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1806 struct btrfs_key *cpu)
1808 disk->offset = cpu_to_le64(cpu->offset);
1809 disk->type = cpu->type;
1810 disk->objectid = cpu_to_le64(cpu->objectid);
1813 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1814 struct btrfs_key *key, int nr)
1816 struct btrfs_disk_key disk_key;
1817 btrfs_node_key(eb, &disk_key, nr);
1818 btrfs_disk_key_to_cpu(key, &disk_key);
1821 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1822 struct btrfs_key *key, int nr)
1824 struct btrfs_disk_key disk_key;
1825 btrfs_item_key(eb, &disk_key, nr);
1826 btrfs_disk_key_to_cpu(key, &disk_key);
1829 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1830 struct btrfs_dir_item *item,
1831 struct btrfs_key *key)
1833 struct btrfs_disk_key disk_key;
1834 btrfs_dir_item_key(eb, item, &disk_key);
1835 btrfs_disk_key_to_cpu(key, &disk_key);
1839 static inline u8 btrfs_key_type(struct btrfs_key *key)
1844 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1849 /* struct btrfs_header */
1850 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1851 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1853 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1854 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1855 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1856 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1857 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1858 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1860 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1861 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1864 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1866 return (btrfs_header_flags(eb) & flag) == flag;
1869 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1871 u64 flags = btrfs_header_flags(eb);
1872 btrfs_set_header_flags(eb, flags | flag);
1873 return (flags & flag) == flag;
1876 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1878 u64 flags = btrfs_header_flags(eb);
1879 btrfs_set_header_flags(eb, flags & ~flag);
1880 return (flags & flag) == flag;
1883 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1885 u64 flags = btrfs_header_flags(eb);
1886 return flags >> BTRFS_BACKREF_REV_SHIFT;
1889 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1892 u64 flags = btrfs_header_flags(eb);
1893 flags &= ~BTRFS_BACKREF_REV_MASK;
1894 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1895 btrfs_set_header_flags(eb, flags);
1898 static inline unsigned long btrfs_header_fsid(void)
1900 return offsetof(struct btrfs_header, fsid);
1903 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1905 return offsetof(struct btrfs_header, chunk_tree_uuid);
1908 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1910 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1914 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1916 unsigned long ptr = offsetof(struct btrfs_header, csum);
1920 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1925 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1930 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1935 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1937 return (btrfs_header_level(eb) == 0);
1940 /* struct btrfs_root_item */
1941 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1943 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1944 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1945 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1947 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1949 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1950 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1951 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1952 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1953 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1954 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1955 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1956 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1958 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1960 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1962 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1964 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1966 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1969 /* struct btrfs_root_backup */
1970 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1972 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1974 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1975 tree_root_level, 8);
1977 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1979 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1980 chunk_root_gen, 64);
1981 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1982 chunk_root_level, 8);
1984 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1986 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1987 extent_root_gen, 64);
1988 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1989 extent_root_level, 8);
1991 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1993 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1995 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1998 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
2000 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
2002 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
2005 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
2007 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
2009 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
2010 csum_root_level, 8);
2011 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
2013 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
2015 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
2018 /* struct btrfs_super_block */
2020 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
2021 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
2022 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
2024 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
2025 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
2026 struct btrfs_super_block, sys_chunk_array_size, 32);
2027 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
2028 struct btrfs_super_block, chunk_root_generation, 64);
2029 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
2031 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
2033 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
2034 chunk_root_level, 8);
2035 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
2037 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
2038 log_root_transid, 64);
2039 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
2041 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
2043 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
2045 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
2047 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
2049 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2051 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2053 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2054 root_dir_objectid, 64);
2055 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2057 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2059 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2060 compat_ro_flags, 64);
2061 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2062 incompat_flags, 64);
2063 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2065 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2066 cache_generation, 64);
2067 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2068 uuid_tree_generation, 64);
2069 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2071 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2073 int t = btrfs_super_csum_type(s);
2074 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2075 return btrfs_csum_sizes[t];
2078 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2080 return offsetof(struct btrfs_leaf, items);
2083 /* struct btrfs_file_extent_item */
2084 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2085 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2087 static inline unsigned long btrfs_file_extent_inline_start(struct
2088 btrfs_file_extent_item *e)
2090 unsigned long offset = (unsigned long)e;
2091 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2095 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2097 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2100 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2102 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2104 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2106 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2108 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2109 disk_num_bytes, 64);
2110 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2112 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2114 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2116 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2118 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2120 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2122 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2124 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2126 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2128 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2129 other_encoding, 16);
2131 /* btrfs_qgroup_status_item */
2132 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2134 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2136 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2138 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
2141 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2142 struct btrfs_qgroup_status_item, version, 64);
2143 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2144 struct btrfs_qgroup_status_item, generation, 64);
2145 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2146 struct btrfs_qgroup_status_item, flags, 64);
2147 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_rescan,
2148 struct btrfs_qgroup_status_item, rescan, 64);
2150 /* btrfs_qgroup_info_item */
2151 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2153 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2155 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2156 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2157 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2159 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2160 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2162 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2163 struct btrfs_qgroup_info_item, generation, 64);
2164 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2165 struct btrfs_qgroup_info_item, referenced, 64);
2166 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2167 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2168 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2169 struct btrfs_qgroup_info_item, exclusive, 64);
2170 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2171 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2173 /* btrfs_qgroup_limit_item */
2174 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2176 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2177 max_referenced, 64);
2178 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2180 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2181 rsv_referenced, 64);
2182 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2185 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2186 struct btrfs_qgroup_limit_item, flags, 64);
2187 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2188 struct btrfs_qgroup_limit_item, max_referenced, 64);
2189 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2190 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2191 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2192 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2193 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2194 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2197 * this returns the number of bytes used by the item on disk, minus the
2198 * size of any extent headers. If a file is compressed on disk, this is
2199 * the compressed size
2201 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2202 struct btrfs_item *e)
2204 unsigned long offset;
2205 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2206 return btrfs_item_size(eb, e) - offset;
2209 /* struct btrfs_ioctl_search_header */
2210 static inline u64 btrfs_search_header_transid(struct btrfs_ioctl_search_header *sh)
2212 return get_unaligned_64(&sh->transid);
2215 static inline u64 btrfs_search_header_objectid(struct btrfs_ioctl_search_header *sh)
2217 return get_unaligned_64(&sh->objectid);
2220 static inline u64 btrfs_search_header_offset(struct btrfs_ioctl_search_header *sh)
2222 return get_unaligned_64(&sh->offset);
2225 static inline u32 btrfs_search_header_type(struct btrfs_ioctl_search_header *sh)
2227 return get_unaligned_32(&sh->type);
2230 static inline u32 btrfs_search_header_len(struct btrfs_ioctl_search_header *sh)
2232 return get_unaligned_32(&sh->len);
2235 /* this returns the number of file bytes represented by the inline item.
2236 * If an item is compressed, this is the uncompressed size
2238 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2240 struct btrfs_file_extent_item *fi)
2243 * return the space used on disk if this item isn't
2244 * compressed or encoded
2246 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2247 btrfs_file_extent_encryption(eb, fi) == 0 &&
2248 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2249 return btrfs_file_extent_inline_item_len(eb,
2250 btrfs_item_nr(slot));
2253 /* otherwise use the ram bytes field */
2254 return btrfs_file_extent_ram_bytes(eb, fi);
2258 * NOTE: Backward compatibility, do not use.
2259 * Replacement: read nodesize directly
2261 __attribute__((deprecated))
2262 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2264 return root->leafsize;
2265 return root->nodesize;
2268 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2270 struct btrfs_super_block *disk_super;
2271 disk_super = fs_info->super_copy;
2272 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2275 static inline int btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag)
2277 struct btrfs_super_block *disk_super;
2278 disk_super = fs_info->super_copy;
2279 return !!(btrfs_super_compat_ro_flags(disk_super) & flag);
2282 /* helper function to cast into the data area of the leaf. */
2283 #define btrfs_item_ptr(leaf, slot, type) \
2284 ((type *)(btrfs_leaf_data(leaf) + \
2285 btrfs_item_offset_nr(leaf, slot)))
2287 #define btrfs_item_ptr_offset(leaf, slot) \
2288 ((unsigned long)(btrfs_leaf_data(leaf) + \
2289 btrfs_item_offset_nr(leaf, slot)))
2292 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2293 struct btrfs_root *root,
2294 u64 num_bytes, u64 empty_size,
2295 u64 hint_byte, u64 search_end,
2296 struct btrfs_key *ins, int data);
2297 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2298 struct btrfs_root *root);
2299 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2300 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2301 u64 bytenr, u64 num_bytes);
2302 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2303 struct btrfs_root *root);
2304 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2305 btrfs_fs_info *info,
2307 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2308 btrfs_fs_info *info,
2310 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2311 struct btrfs_root *root,
2312 u32 blocksize, u64 root_objectid,
2313 struct btrfs_disk_key *key, int level,
2314 u64 hint, u64 empty_size);
2315 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2316 struct btrfs_root *root,
2317 u64 num_bytes, u64 parent,
2318 u64 root_objectid, u64 ref_generation,
2319 u64 owner, u64 empty_size, u64 hint_byte,
2320 u64 search_end, struct btrfs_key *ins, int data);
2321 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2322 struct btrfs_root *root, u64 bytenr,
2323 u64 offset, int metadata, u64 *refs, u64 *flags);
2324 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2325 struct btrfs_root *root,
2326 u64 bytenr, int level, u64 flags);
2327 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2328 struct extent_buffer *buf, int record_parent);
2329 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2330 struct extent_buffer *buf, int record_parent);
2331 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2332 struct btrfs_root *root,
2333 u64 bytenr, u64 num_bytes, u64 parent,
2334 u64 root_objectid, u64 owner, u64 offset);
2335 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2336 struct btrfs_root *root,
2337 struct extent_io_tree *unpin);
2338 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2339 struct btrfs_root *root,
2340 u64 bytenr, u64 num_bytes, u64 parent,
2341 u64 root_objectid, u64 ref_generation,
2342 u64 owner_objectid);
2343 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2344 struct btrfs_root *root, u64 bytenr,
2345 u64 orig_parent, u64 parent,
2346 u64 root_objectid, u64 ref_generation,
2347 u64 owner_objectid);
2348 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2349 struct btrfs_root *root);
2350 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2351 int btrfs_read_block_groups(struct btrfs_root *root);
2352 struct btrfs_block_group_cache *
2353 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2354 u64 chunk_objectid, u64 chunk_offset, u64 size);
2355 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root, u64 bytes_used,
2357 u64 type, u64 chunk_objectid, u64 chunk_offset,
2359 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2360 struct btrfs_root *root);
2361 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2362 struct btrfs_root *root, u64 bytenr, u64 num,
2363 int alloc, int mark_free);
2364 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2365 struct btrfs_root *root, u64 objectid,
2366 struct btrfs_inode_item *inode,
2367 u64 file_pos, u64 disk_bytenr,
2369 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2370 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2371 void free_excluded_extents(struct btrfs_root *root,
2372 struct btrfs_block_group_cache *cache);
2373 int exclude_super_stripes(struct btrfs_root *root,
2374 struct btrfs_block_group_cache *cache);
2375 u64 add_new_free_space(struct btrfs_block_group_cache *block_group,
2376 struct btrfs_fs_info *info, u64 start, u64 end);
2377 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset);
2380 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2381 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2382 struct btrfs_path *path, int level, int slot);
2383 enum btrfs_tree_block_status
2384 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2385 struct extent_buffer *buf);
2386 enum btrfs_tree_block_status
2387 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2388 struct extent_buffer *buf);
2389 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2390 int level, int slot, u64 objectid);
2391 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2392 struct extent_buffer *parent, int slot);
2393 int btrfs_previous_item(struct btrfs_root *root,
2394 struct btrfs_path *path, u64 min_objectid,
2396 int btrfs_previous_extent_item(struct btrfs_root *root,
2397 struct btrfs_path *path, u64 min_objectid);
2398 int btrfs_next_extent_item(struct btrfs_root *root,
2399 struct btrfs_path *path, u64 max_objectid);
2400 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2401 struct btrfs_root *root, struct extent_buffer *buf,
2402 struct extent_buffer *parent, int parent_slot,
2403 struct extent_buffer **cow_ret);
2404 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2405 struct btrfs_root *root,
2406 struct extent_buffer *buf,
2407 struct extent_buffer *parent, int parent_slot,
2408 struct extent_buffer **cow_ret,
2409 u64 search_start, u64 empty_size);
2410 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2411 struct btrfs_root *root,
2412 struct extent_buffer *buf,
2413 struct extent_buffer **cow_ret, u64 new_root_objectid);
2414 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2415 *root, struct btrfs_path *path, u32 data_size);
2416 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root,
2418 struct btrfs_path *path,
2419 u32 new_size, int from_end);
2420 int btrfs_split_item(struct btrfs_trans_handle *trans,
2421 struct btrfs_root *root,
2422 struct btrfs_path *path,
2423 struct btrfs_key *new_key,
2424 unsigned long split_offset);
2425 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2426 *root, struct btrfs_key *key, struct btrfs_path *p, int
2428 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2429 u64 iobjectid, u64 ioff, u8 key_type,
2430 struct btrfs_key *found_key);
2431 void btrfs_release_path(struct btrfs_path *p);
2432 void add_root_to_dirty_list(struct btrfs_root *root);
2433 struct btrfs_path *btrfs_alloc_path(void);
2434 void btrfs_free_path(struct btrfs_path *p);
2435 void btrfs_init_path(struct btrfs_path *p);
2436 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2437 struct btrfs_path *path, int slot, int nr);
2439 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2440 struct btrfs_root *root,
2441 struct btrfs_path *path)
2443 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2446 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2447 *root, struct btrfs_key *key, void *data, u32 data_size);
2448 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2449 struct btrfs_root *root,
2450 struct btrfs_path *path,
2451 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2453 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2454 struct btrfs_root *root,
2455 struct btrfs_path *path,
2456 struct btrfs_key *key,
2459 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2462 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2463 static inline int btrfs_next_item(struct btrfs_root *root,
2464 struct btrfs_path *p)
2467 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2468 return btrfs_next_leaf(root, p);
2472 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2473 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2474 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2475 struct btrfs_disk_key *key, int level);
2476 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2477 struct btrfs_key *new_key);
2478 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2479 struct btrfs_path *path,
2480 struct btrfs_key *new_key);
2483 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2484 struct btrfs_root *tree_root,
2485 u64 root_id, u8 type, u64 ref_id,
2486 u64 dirid, u64 sequence,
2487 const char *name, int name_len);
2488 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2489 *root, struct btrfs_key *key, struct btrfs_root_item
2491 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2492 *root, struct btrfs_key *key, struct btrfs_root_item
2494 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2495 btrfs_root_item *item, struct btrfs_key *key);
2497 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2498 *root, const char *name, int name_len, u64 dir,
2499 struct btrfs_key *location, u8 type, u64 index);
2500 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2501 struct btrfs_root *root,
2502 struct btrfs_path *path, u64 dir,
2503 const char *name, int name_len,
2505 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2506 struct btrfs_root *root,
2507 struct btrfs_path *path, u64 dir,
2508 const char *name, int name_len,
2509 u64 index, int mod);
2510 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2511 struct btrfs_root *root,
2512 struct btrfs_path *path,
2513 struct btrfs_dir_item *di);
2514 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2515 struct btrfs_root *root, const char *name,
2516 u16 name_len, const void *data, u16 data_len,
2519 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2520 struct btrfs_root *fs_root,
2521 u64 dirid, u64 *objectid);
2524 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2525 struct btrfs_root *root,
2526 const char *name, int name_len,
2527 u64 inode_objectid, u64 ref_objectid, u64 index);
2528 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2529 *root, u64 objectid, struct btrfs_inode_item
2531 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2532 *root, struct btrfs_path *path,
2533 struct btrfs_key *location, int mod);
2534 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2535 *trans, struct btrfs_path *path, struct btrfs_root *root,
2536 u64 ino, u64 parent_ino, u64 index, const char *name,
2537 int namelen, int ins_len);
2538 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2539 struct btrfs_root *root,
2540 const char *name, int name_len,
2541 u64 inode_objectid, u64 ref_objectid,
2543 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2544 struct btrfs_root *root,
2545 const char *name, int name_len,
2546 u64 inode_objectid, u64 ref_objectid, u64 index);
2547 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2548 struct btrfs_root *root, struct btrfs_path *path,
2549 const char *name, int namelen, u64 ino, u64 parent_ino,
2550 u64 index, int ins_len);
2551 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2552 struct btrfs_root *root, const char *name, int name_len,
2553 u64 ino, u64 parent_ino, u64 *index);
2556 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2557 struct btrfs_root *root, u64 bytenr, u64 len);
2558 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2559 struct btrfs_root *root,
2560 u64 objectid, u64 pos, u64 offset,
2563 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2564 struct btrfs_root *root, u64 objectid,
2565 u64 offset, char *buffer, size_t size);
2566 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2567 struct btrfs_root *root, u64 alloc_end,
2568 u64 bytenr, char *data, size_t len);
2569 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2570 struct btrfs_root *root, struct btrfs_path *path,
2574 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2575 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2578 static inline int is_fstree(u64 rootid)
2580 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2581 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2587 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2588 u64 dir, u64 index);
2589 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2591 int btrfs_change_inode_flags(struct btrfs_trans_handle *trans,
2592 struct btrfs_root *root, u64 ino, u64 flags);
2593 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2594 u64 ino, u64 parent_ino, char *name, int namelen,
2595 u8 type, u64 *index, int add_backref);
2596 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2597 u64 ino, u64 parent_ino, u64 index, const char *name,
2598 int namelen, int add_orphan);
2599 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2600 struct btrfs_root *root, struct btrfs_path *path,
2602 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2603 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2606 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2607 struct btrfs_root *root,
2608 struct btrfs_path *path,
2609 u64 ino, u64 offset, u64 len, int ins_len);
2610 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2611 struct btrfs_root *root,
2612 u64 ino, u64 offset, u64 len);