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 */
43 #define BTRFS_MAX_MIRRORS 3
45 #define BTRFS_MAX_LEVEL 8
47 #define BTRFS_COMPAT_EXTENT_TREE_V0
49 /* holds pointers to all of the tree roots */
50 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
52 /* stores information about which extents are in use, and reference counts */
53 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
56 * chunk tree stores translations from logical -> physical block numbering
57 * the super block points to the chunk tree
59 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
62 * stores information about which areas of a given device are in use.
63 * one per device. The tree of tree roots points to the device tree
65 #define BTRFS_DEV_TREE_OBJECTID 4ULL
67 /* one per subvolume, storing files and directories */
68 #define BTRFS_FS_TREE_OBJECTID 5ULL
70 /* directory objectid inside the root tree */
71 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
72 /* holds checksums of all the data extents */
73 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
74 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
76 /* for storing items that use the BTRFS_UUID_KEY* */
77 #define BTRFS_UUID_TREE_OBJECTID 9ULL
79 /* for storing balance parameters in the root tree */
80 #define BTRFS_BALANCE_OBJECTID -4ULL
82 /* oprhan objectid for tracking unlinked/truncated files */
83 #define BTRFS_ORPHAN_OBJECTID -5ULL
85 /* does write ahead logging to speed up fsyncs */
86 #define BTRFS_TREE_LOG_OBJECTID -6ULL
87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
94 * extent checksums all have this objectid
95 * this allows them to share the logging tree
98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
100 /* For storing free space cache */
101 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
104 * The inode number assigned to the special inode for sotring
107 #define BTRFS_FREE_INO_OBJECTID -12ULL
109 /* dummy objectid represents multiple objectids */
110 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
113 * All files have objectids in this range.
115 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
116 #define BTRFS_LAST_FREE_OBJECTID -256ULL
117 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
122 * the device items go into the chunk tree. The key is in the form
123 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
125 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
128 * the max metadata block size. This limit is somewhat artificial,
129 * but the memmove costs go through the roof for larger blocks.
131 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
134 * we can actually store much bigger names, but lets not confuse the rest
137 #define BTRFS_NAME_LEN 255
140 * Theoretical limit is larger, but we keep this down to a sane
141 * value. That should limit greatly the possibility of collisions on
144 #define BTRFS_LINK_MAX 65535U
146 /* 32 bytes in various csum fields */
147 #define BTRFS_CSUM_SIZE 32
150 #define BTRFS_CSUM_TYPE_CRC32 0
152 static int btrfs_csum_sizes[] = { 4, 0 };
154 /* four bytes for CRC32 */
155 #define BTRFS_CRC32_SIZE 4
156 #define BTRFS_EMPTY_DIR_SIZE 0
158 #define BTRFS_FT_UNKNOWN 0
159 #define BTRFS_FT_REG_FILE 1
160 #define BTRFS_FT_DIR 2
161 #define BTRFS_FT_CHRDEV 3
162 #define BTRFS_FT_BLKDEV 4
163 #define BTRFS_FT_FIFO 5
164 #define BTRFS_FT_SOCK 6
165 #define BTRFS_FT_SYMLINK 7
166 #define BTRFS_FT_XATTR 8
167 #define BTRFS_FT_MAX 9
169 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
172 * the key defines the order in the tree, and so it also defines (optimal)
173 * block layout. objectid corresonds to the inode number. The flags
174 * tells us things about the object, and is a kind of stream selector.
175 * so for a given inode, keys with flags of 1 might refer to the inode
176 * data, flags of 2 may point to file data in the btree and flags == 3
177 * may point to extents.
179 * offset is the starting byte offset for this key in the stream.
181 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
182 * in cpu native order. Otherwise they are identical and their sizes
183 * should be the same (ie both packed)
185 struct btrfs_disk_key {
189 } __attribute__ ((__packed__));
195 } __attribute__ ((__packed__));
197 struct btrfs_mapping_tree {
198 struct cache_tree cache_tree;
201 #define BTRFS_UUID_SIZE 16
202 struct btrfs_dev_item {
203 /* the internal btrfs device id */
206 /* size of the device */
212 /* optimal io alignment for this device */
215 /* optimal io width for this device */
218 /* minimal io size for this device */
221 /* type and info about this device */
224 /* expected generation for this device */
228 * starting byte of this partition on the device,
229 * to allowr for stripe alignment in the future
233 /* grouping information for allocation decisions */
236 /* seek speed 0-100 where 100 is fastest */
239 /* bandwidth 0-100 where 100 is fastest */
242 /* btrfs generated uuid for this device */
243 u8 uuid[BTRFS_UUID_SIZE];
245 /* uuid of FS who owns this device */
246 u8 fsid[BTRFS_UUID_SIZE];
247 } __attribute__ ((__packed__));
249 struct btrfs_stripe {
252 u8 dev_uuid[BTRFS_UUID_SIZE];
253 } __attribute__ ((__packed__));
256 /* size of this chunk in bytes */
259 /* objectid of the root referencing this chunk */
265 /* optimal io alignment for this chunk */
268 /* optimal io width for this chunk */
271 /* minimal io size for this chunk */
274 /* 2^16 stripes is quite a lot, a second limit is the size of a single
279 /* sub stripes only matter for raid10 */
281 struct btrfs_stripe stripe;
282 /* additional stripes go here */
283 } __attribute__ ((__packed__));
285 #define BTRFS_FREE_SPACE_EXTENT 1
286 #define BTRFS_FREE_SPACE_BITMAP 2
288 struct btrfs_free_space_entry {
292 } __attribute__ ((__packed__));
294 struct btrfs_free_space_header {
295 struct btrfs_disk_key location;
299 } __attribute__ ((__packed__));
301 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
303 BUG_ON(num_stripes == 0);
304 return sizeof(struct btrfs_chunk) +
305 sizeof(struct btrfs_stripe) * (num_stripes - 1);
308 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
309 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
310 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
311 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
312 #define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
314 #define BTRFS_BACKREF_REV_MAX 256
315 #define BTRFS_BACKREF_REV_SHIFT 56
316 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
317 BTRFS_BACKREF_REV_SHIFT)
319 #define BTRFS_OLD_BACKREF_REV 0
320 #define BTRFS_MIXED_BACKREF_REV 1
323 * every tree block (leaf or node) starts with this header.
325 struct btrfs_header {
326 /* these first four must match the super block */
327 u8 csum[BTRFS_CSUM_SIZE];
328 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
329 __le64 bytenr; /* which block this node is supposed to live in */
332 /* allowed to be different from the super from here on down */
333 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
338 } __attribute__ ((__packed__));
340 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
341 sizeof(struct btrfs_header)) / \
342 sizeof(struct btrfs_key_ptr))
343 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
344 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
345 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
346 sizeof(struct btrfs_item) - \
347 sizeof(struct btrfs_file_extent_item))
348 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
349 sizeof(struct btrfs_item) -\
350 sizeof(struct btrfs_dir_item))
354 * this is a very generous portion of the super block, giving us
355 * room to translate 14 chunks with 3 stripes each.
357 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
358 #define BTRFS_LABEL_SIZE 256
361 * just in case we somehow lose the roots and are not able to mount,
362 * we store an array of the roots from previous transactions
365 #define BTRFS_NUM_BACKUP_ROOTS 4
366 struct btrfs_root_backup {
368 __le64 tree_root_gen;
371 __le64 chunk_root_gen;
374 __le64 extent_root_gen;
383 __le64 csum_root_gen;
393 u8 extent_root_level;
397 /* future and to align */
399 } __attribute__ ((__packed__));
402 * the super block basically lists the main trees of the FS
403 * it currently lacks any block count etc etc
405 struct btrfs_super_block {
406 u8 csum[BTRFS_CSUM_SIZE];
407 /* the first 3 fields must match struct btrfs_header */
408 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
409 __le64 bytenr; /* this block number */
412 /* allowed to be different from the btrfs_header from here own down */
419 /* this will help find the new super based on the log root */
420 __le64 log_root_transid;
423 __le64 root_dir_objectid;
429 __le32 sys_chunk_array_size;
430 __le64 chunk_root_generation;
432 __le64 compat_ro_flags;
433 __le64 incompat_flags;
438 struct btrfs_dev_item dev_item;
440 char label[BTRFS_LABEL_SIZE];
442 __le64 cache_generation;
443 __le64 uuid_tree_generation;
445 /* future expansion */
447 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
448 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
449 } __attribute__ ((__packed__));
452 * Compat flags that we support. If any incompat flags are set other than the
453 * ones specified below then we will fail to mount
455 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
456 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
457 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
458 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
461 * some patches floated around with a second compression method
462 * lets save that incompat here for when they do get in
463 * Note we don't actually support it, we're just reserving the
466 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
469 * older kernels tried to do bigger metadata blocks, but the
470 * code was pretty buggy. Lets not let them try anymore.
472 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
473 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
474 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
475 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
476 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
479 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
480 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
481 #define BTRFS_FEATURE_INCOMPAT_SUPP \
482 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
483 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
484 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
485 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
486 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
487 BTRFS_FEATURE_INCOMPAT_RAID56 | \
488 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
489 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
490 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
493 * A leaf is full of items. offset and size tell us where to find
494 * the item in the leaf (relative to the start of the data area)
497 struct btrfs_disk_key key;
500 } __attribute__ ((__packed__));
503 * leaves have an item area and a data area:
504 * [item0, item1....itemN] [free space] [dataN...data1, data0]
506 * The data is separate from the items to get the keys closer together
510 struct btrfs_header header;
511 struct btrfs_item items[];
512 } __attribute__ ((__packed__));
515 * all non-leaf blocks are nodes, they hold only keys and pointers to
518 struct btrfs_key_ptr {
519 struct btrfs_disk_key key;
522 } __attribute__ ((__packed__));
525 struct btrfs_header header;
526 struct btrfs_key_ptr ptrs[];
527 } __attribute__ ((__packed__));
530 * btrfs_paths remember the path taken from the root down to the leaf.
531 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
532 * to any other levels that are present.
534 * The slots array records the index of the item or block pointer
535 * used while walking the tree.
539 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
540 int slots[BTRFS_MAX_LEVEL];
541 /* if there is real range locking, this locks field will change */
542 int locks[BTRFS_MAX_LEVEL];
544 /* keep some upper locks as we walk down */
548 * set by btrfs_split_item, tells search_slot to keep all locks
549 * and to force calls to keep space in the nodes
551 unsigned int search_for_split:1;
552 unsigned int skip_check_block:1;
556 * items in the extent btree are used to record the objectid of the
557 * owner of the block and the number of references
560 struct btrfs_extent_item {
564 } __attribute__ ((__packed__));
566 struct btrfs_extent_item_v0 {
568 } __attribute__ ((__packed__));
570 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
571 sizeof(struct btrfs_item))
573 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
574 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
576 /* following flags only apply to tree blocks */
578 /* use full backrefs for extent pointers in the block*/
579 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
581 struct btrfs_tree_block_info {
582 struct btrfs_disk_key key;
584 } __attribute__ ((__packed__));
586 struct btrfs_extent_data_ref {
591 } __attribute__ ((__packed__));
593 struct btrfs_shared_data_ref {
595 } __attribute__ ((__packed__));
597 struct btrfs_extent_inline_ref {
600 } __attribute__ ((__packed__));
602 struct btrfs_extent_ref_v0 {
607 } __attribute__ ((__packed__));
609 /* dev extents record free space on individual devices. The owner
610 * field points back to the chunk allocation mapping tree that allocated
611 * the extent. The chunk tree uuid field is a way to double check the owner
613 struct btrfs_dev_extent {
615 __le64 chunk_objectid;
618 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
619 } __attribute__ ((__packed__));
621 struct btrfs_inode_ref {
625 } __attribute__ ((__packed__));
627 struct btrfs_inode_extref {
628 __le64 parent_objectid;
631 __u8 name[0]; /* name goes here */
632 } __attribute__ ((__packed__));
634 struct btrfs_timespec {
637 } __attribute__ ((__packed__));
640 BTRFS_COMPRESS_NONE = 0,
641 BTRFS_COMPRESS_ZLIB = 1,
642 BTRFS_COMPRESS_LZO = 2,
643 BTRFS_COMPRESS_TYPES = 2,
644 BTRFS_COMPRESS_LAST = 3,
645 } btrfs_compression_type;
647 /* we don't understand any encryption methods right now */
649 BTRFS_ENCRYPTION_NONE = 0,
650 BTRFS_ENCRYPTION_LAST = 1,
651 } btrfs_encryption_type;
653 enum btrfs_tree_block_status {
654 BTRFS_TREE_BLOCK_CLEAN,
655 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
656 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
657 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
658 BTRFS_TREE_BLOCK_INVALID_LEVEL,
659 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
660 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
663 struct btrfs_inode_item {
664 /* nfs style generation number */
666 /* transid that last touched this inode */
678 /* modification sequence number for NFS */
682 * a little future expansion, for more than this we can
683 * just grow the inode item and version it
686 struct btrfs_timespec atime;
687 struct btrfs_timespec ctime;
688 struct btrfs_timespec mtime;
689 struct btrfs_timespec otime;
690 } __attribute__ ((__packed__));
692 struct btrfs_dir_log_item {
694 } __attribute__ ((__packed__));
696 struct btrfs_dir_item {
697 struct btrfs_disk_key location;
702 } __attribute__ ((__packed__));
704 struct btrfs_root_item_v0 {
705 struct btrfs_inode_item inode;
711 __le64 last_snapshot;
714 struct btrfs_disk_key drop_progress;
717 } __attribute__ ((__packed__));
719 struct btrfs_root_item {
720 struct btrfs_inode_item inode;
726 __le64 last_snapshot;
729 struct btrfs_disk_key drop_progress;
734 * The following fields appear after subvol_uuids+subvol_times
739 * This generation number is used to test if the new fields are valid
740 * and up to date while reading the root item. Everytime the root item
741 * is written out, the "generation" field is copied into this field. If
742 * anyone ever mounted the fs with an older kernel, we will have
743 * mismatching generation values here and thus must invalidate the
744 * new fields. See btrfs_update_root and btrfs_find_last_root for
746 * the offset of generation_v2 is also used as the start for the memset
747 * when invalidating the fields.
749 __le64 generation_v2;
750 u8 uuid[BTRFS_UUID_SIZE];
751 u8 parent_uuid[BTRFS_UUID_SIZE];
752 u8 received_uuid[BTRFS_UUID_SIZE];
753 __le64 ctransid; /* updated when an inode changes */
754 __le64 otransid; /* trans when created */
755 __le64 stransid; /* trans when sent. non-zero for received subvol */
756 __le64 rtransid; /* trans when received. non-zero for received subvol */
757 struct btrfs_timespec ctime;
758 struct btrfs_timespec otime;
759 struct btrfs_timespec stime;
760 struct btrfs_timespec rtime;
761 __le64 reserved[8]; /* for future */
762 } __attribute__ ((__packed__));
765 * this is used for both forward and backward root refs
767 struct btrfs_root_ref {
771 } __attribute__ ((__packed__));
773 #define BTRFS_FILE_EXTENT_INLINE 0
774 #define BTRFS_FILE_EXTENT_REG 1
775 #define BTRFS_FILE_EXTENT_PREALLOC 2
777 struct btrfs_file_extent_item {
779 * transaction id that created this extent
783 * max number of bytes to hold this extent in ram
784 * when we split a compressed extent we can't know how big
785 * each of the resulting pieces will be. So, this is
786 * an upper limit on the size of the extent in ram instead of
792 * 32 bits for the various ways we might encode the data,
793 * including compression and encryption. If any of these
794 * are set to something a given disk format doesn't understand
795 * it is treated like an incompat flag for reading and writing,
800 __le16 other_encoding; /* spare for later use */
802 /* are we inline data or a real extent? */
806 * disk space consumed by the extent, checksum blocks are included
810 __le64 disk_num_bytes;
812 * the logical offset in file blocks (no csums)
813 * this extent record is for. This allows a file extent to point
814 * into the middle of an existing extent on disk, sharing it
815 * between two snapshots (useful if some bytes in the middle of the
816 * extent have changed
820 * the logical number of file blocks (no csums included)
824 } __attribute__ ((__packed__));
826 struct btrfs_csum_item {
828 } __attribute__ ((__packed__));
831 * We don't want to overwrite 1M at the beginning of device, even though
832 * there is our 1st superblock at 64k. Some possible reasons:
833 * - the first 64k blank is useful for some boot loader/manager
834 * - the first 1M could be scratched by buggy partitioner or somesuch
836 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
838 /* tag for the radix tree of block groups in ram */
839 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
840 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
841 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
842 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
843 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
844 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
845 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
846 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
847 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
848 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
849 #define BTRFS_NR_RAID_TYPES 7
851 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
852 BTRFS_BLOCK_GROUP_SYSTEM | \
853 BTRFS_BLOCK_GROUP_METADATA)
855 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
856 BTRFS_BLOCK_GROUP_RAID1 | \
857 BTRFS_BLOCK_GROUP_RAID5 | \
858 BTRFS_BLOCK_GROUP_RAID6 | \
859 BTRFS_BLOCK_GROUP_DUP | \
860 BTRFS_BLOCK_GROUP_RAID10)
862 /* used in struct btrfs_balance_args fields */
863 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
866 * GLOBAL_RSV does not exist as a on-disk block group type and is used
867 * internally for exporting info about global block reserve from space infos
869 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
871 #define BTRFS_QGROUP_LEVEL_SHIFT 48
873 static inline u64 btrfs_qgroup_level(u64 qgroupid)
875 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
878 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
880 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
883 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
884 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
885 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
887 struct btrfs_qgroup_status_item {
891 __le64 scan; /* progress during scanning */
892 } __attribute__ ((__packed__));
894 struct btrfs_block_group_item {
896 __le64 chunk_objectid;
898 } __attribute__ ((__packed__));
900 struct btrfs_qgroup_info_item {
903 __le64 referenced_compressed;
905 __le64 exclusive_compressed;
906 } __attribute__ ((__packed__));
908 /* flags definition for qgroup limits */
909 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
910 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
911 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
912 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
913 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
914 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
916 struct btrfs_qgroup_limit_item {
918 __le64 max_referenced;
919 __le64 max_exclusive;
920 __le64 rsv_referenced;
921 __le64 rsv_exclusive;
922 } __attribute__ ((__packed__));
924 struct btrfs_space_info {
930 struct list_head list;
933 struct btrfs_block_group_cache {
934 struct cache_extent cache;
935 struct btrfs_key key;
936 struct btrfs_block_group_item item;
937 struct btrfs_space_info *space_info;
938 struct btrfs_free_space_ctl *free_space_ctl;
946 struct btrfs_extent_ops {
947 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
948 u64 hint_byte, struct btrfs_key *ins);
949 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
954 struct btrfs_fs_devices;
955 struct btrfs_fs_info {
956 u8 fsid[BTRFS_FSID_SIZE];
957 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
958 struct btrfs_root *fs_root;
959 struct btrfs_root *extent_root;
960 struct btrfs_root *tree_root;
961 struct btrfs_root *chunk_root;
962 struct btrfs_root *dev_root;
963 struct btrfs_root *csum_root;
964 struct btrfs_root *quota_root;
966 struct rb_root fs_root_tree;
968 /* the log root tree is a directory of all the other log roots */
969 struct btrfs_root *log_root_tree;
971 struct extent_io_tree extent_cache;
972 struct extent_io_tree free_space_cache;
973 struct extent_io_tree block_group_cache;
974 struct extent_io_tree pinned_extents;
975 struct extent_io_tree pending_del;
976 struct extent_io_tree extent_ins;
977 struct extent_io_tree *excluded_extents;
979 /* logical->physical extent mapping */
980 struct btrfs_mapping_tree mapping_tree;
983 u64 last_trans_committed;
985 u64 avail_data_alloc_bits;
986 u64 avail_metadata_alloc_bits;
987 u64 avail_system_alloc_bits;
988 u64 data_alloc_profile;
989 u64 metadata_alloc_profile;
990 u64 system_alloc_profile;
993 struct btrfs_trans_handle *running_transaction;
994 struct btrfs_super_block *super_copy;
995 struct mutex fs_mutex;
1000 struct btrfs_extent_ops *extent_ops;
1001 struct list_head dirty_cowonly_roots;
1002 struct list_head recow_ebs;
1004 struct btrfs_fs_devices *fs_devices;
1005 struct list_head space_info;
1008 unsigned int readonly:1;
1009 unsigned int on_restoring:1;
1010 unsigned int is_chunk_recover:1;
1011 unsigned int quota_enabled:1;
1012 unsigned int suppress_check_block_errors:1;
1014 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1015 struct btrfs_root *root,
1016 u64 bytenr, u64 num_bytes, u64 parent,
1017 u64 root_objectid, u64 owner, u64 offset,
1019 struct cache_tree *fsck_extent_cache;
1020 struct cache_tree *corrupt_blocks;
1025 * in ram representation of the tree. extent_root is used for all allocations
1026 * and for the extent tree extent_root root.
1029 struct extent_buffer *node;
1030 struct extent_buffer *commit_root;
1031 struct btrfs_root_item root_item;
1032 struct btrfs_key root_key;
1033 struct btrfs_fs_info *fs_info;
1037 /* data allocations are done in sectorsize units */
1040 /* node allocations are done in nodesize units */
1043 /* leaf allocations are done in leafsize units */
1046 /* leaf allocations are done in leafsize units */
1055 u64 last_inode_alloc;
1058 * Record orphan data extent ref
1060 * TODO: Don't restore things in btrfs_root.
1061 * Directly record it into inode_record, which needs a lot of
1062 * infrastructure change to allow cooperation between extent
1065 struct list_head orphan_data_extents;
1067 /* the dirty list is only used by non-reference counted roots */
1068 struct list_head dirty_list;
1069 struct rb_node rb_node;
1073 * inode items have the data typically returned from stat and store other
1074 * info about object characteristics. There is one for every file and dir in
1077 #define BTRFS_INODE_ITEM_KEY 1
1078 #define BTRFS_INODE_REF_KEY 12
1079 #define BTRFS_INODE_EXTREF_KEY 13
1080 #define BTRFS_XATTR_ITEM_KEY 24
1081 #define BTRFS_ORPHAN_ITEM_KEY 48
1083 #define BTRFS_DIR_LOG_ITEM_KEY 60
1084 #define BTRFS_DIR_LOG_INDEX_KEY 72
1086 * dir items are the name -> inode pointers in a directory. There is one
1087 * for every name in a directory.
1089 #define BTRFS_DIR_ITEM_KEY 84
1090 #define BTRFS_DIR_INDEX_KEY 96
1093 * extent data is for file data
1095 #define BTRFS_EXTENT_DATA_KEY 108
1098 * csum items have the checksums for data in the extents
1100 #define BTRFS_CSUM_ITEM_KEY 120
1102 * extent csums are stored in a separate tree and hold csums for
1103 * an entire extent on disk.
1105 #define BTRFS_EXTENT_CSUM_KEY 128
1108 * root items point to tree roots. There are typically in the root
1109 * tree used by the super block to find all the other trees
1111 #define BTRFS_ROOT_ITEM_KEY 132
1114 * root backrefs tie subvols and snapshots to the directory entries that
1117 #define BTRFS_ROOT_BACKREF_KEY 144
1120 * root refs make a fast index for listing all of the snapshots and
1121 * subvolumes referenced by a given root. They point directly to the
1122 * directory item in the root that references the subvol
1124 #define BTRFS_ROOT_REF_KEY 156
1127 * extent items are in the extent map tree. These record which blocks
1128 * are used, and how many references there are to each block
1130 #define BTRFS_EXTENT_ITEM_KEY 168
1133 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1134 * the length, so we save the level in key->offset instead of the length.
1136 #define BTRFS_METADATA_ITEM_KEY 169
1138 #define BTRFS_TREE_BLOCK_REF_KEY 176
1140 #define BTRFS_EXTENT_DATA_REF_KEY 178
1142 /* old style extent backrefs */
1143 #define BTRFS_EXTENT_REF_V0_KEY 180
1145 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1147 #define BTRFS_SHARED_DATA_REF_KEY 184
1151 * block groups give us hints into the extent allocation trees. Which
1152 * blocks are free etc etc
1154 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1156 #define BTRFS_DEV_EXTENT_KEY 204
1157 #define BTRFS_DEV_ITEM_KEY 216
1158 #define BTRFS_CHUNK_ITEM_KEY 228
1160 #define BTRFS_BALANCE_ITEM_KEY 248
1165 #define BTRFS_QGROUP_STATUS_KEY 240
1166 #define BTRFS_QGROUP_INFO_KEY 242
1167 #define BTRFS_QGROUP_LIMIT_KEY 244
1168 #define BTRFS_QGROUP_RELATION_KEY 246
1171 * Persistently stores the io stats in the device tree.
1172 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1174 #define BTRFS_DEV_STATS_KEY 249
1177 * Persistently stores the device replace state in the device tree.
1178 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1180 #define BTRFS_DEV_REPLACE_KEY 250
1183 * Stores items that allow to quickly map UUIDs to something else.
1184 * These items are part of the filesystem UUID tree.
1185 * The key is built like this:
1186 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1188 #if BTRFS_UUID_SIZE != 16
1189 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1191 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1192 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1193 * received subvols */
1196 * string items are for debugging. They just store a short string of
1199 #define BTRFS_STRING_ITEM_KEY 253
1203 #define BTRFS_INODE_NODATASUM (1 << 0)
1204 #define BTRFS_INODE_NODATACOW (1 << 1)
1205 #define BTRFS_INODE_READONLY (1 << 2)
1207 #define read_eb_member(eb, ptr, type, member, result) ( \
1208 read_extent_buffer(eb, (char *)(result), \
1209 ((unsigned long)(ptr)) + \
1210 offsetof(type, member), \
1211 sizeof(((type *)0)->member)))
1213 #define write_eb_member(eb, ptr, type, member, result) ( \
1214 write_extent_buffer(eb, (char *)(result), \
1215 ((unsigned long)(ptr)) + \
1216 offsetof(type, member), \
1217 sizeof(((type *)0)->member)))
1219 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1220 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1222 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1223 return le##bits##_to_cpu(h->member); \
1225 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1228 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1229 h->member = cpu_to_le##bits(val); \
1232 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1233 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1236 unsigned long offset = (unsigned long)s; \
1237 const type *p = (type *) (eb->data + offset); \
1238 return get_unaligned_le##bits(&p->member); \
1240 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1241 type *s, u##bits val) \
1243 unsigned long offset = (unsigned long)s; \
1244 type *p = (type *) (eb->data + offset); \
1245 put_unaligned_le##bits(val, &p->member); \
1248 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1249 static inline u##bits btrfs_##name(const type *s) \
1251 return le##bits##_to_cpu(s->member); \
1253 static inline void btrfs_set_##name(type *s, u##bits val) \
1255 s->member = cpu_to_le##bits(val); \
1258 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1259 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1260 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1261 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1262 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1263 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1265 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1266 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1267 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1268 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1269 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1270 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1272 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1273 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1275 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1277 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1279 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1281 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1283 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1284 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1286 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1288 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1290 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1293 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1295 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1298 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1300 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1303 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1304 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1305 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1306 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1307 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1308 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1309 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1310 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1311 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1312 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1313 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1315 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1317 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1320 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1321 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1322 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1324 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1326 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1328 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1330 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1331 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1333 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1335 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1336 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1338 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1341 unsigned long offset = (unsigned long)c;
1342 offset += offsetof(struct btrfs_chunk, stripe);
1343 offset += nr * sizeof(struct btrfs_stripe);
1344 return (struct btrfs_stripe *)offset;
1347 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1349 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1352 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1353 struct btrfs_chunk *c, int nr)
1355 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1358 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1359 struct btrfs_chunk *c, int nr,
1362 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1365 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1366 struct btrfs_chunk *c, int nr)
1368 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1371 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1372 struct btrfs_chunk *c, int nr,
1375 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1378 /* struct btrfs_block_group_item */
1379 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1381 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1383 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1384 struct btrfs_block_group_item, chunk_objectid, 64);
1386 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1387 struct btrfs_block_group_item, chunk_objectid, 64);
1388 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1389 struct btrfs_block_group_item, flags, 64);
1390 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1391 struct btrfs_block_group_item, flags, 64);
1393 /* struct btrfs_inode_ref */
1394 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1395 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1396 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1398 /* struct btrfs_inode_extref */
1399 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1400 parent_objectid, 64);
1401 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1403 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1405 /* struct btrfs_inode_item */
1406 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1407 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1408 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1409 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1410 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1411 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1412 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1413 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1414 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1415 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1416 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1417 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1419 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1420 struct btrfs_inode_item, generation, 64);
1421 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1422 struct btrfs_inode_item, generation, 64);
1423 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1424 struct btrfs_inode_item, size, 64);
1425 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1426 struct btrfs_inode_item, nbytes, 64);
1427 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1428 struct btrfs_inode_item, block_group, 64);
1429 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1430 struct btrfs_inode_item, nlink, 32);
1431 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1432 struct btrfs_inode_item, uid, 32);
1433 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1434 struct btrfs_inode_item, gid, 32);
1435 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1436 struct btrfs_inode_item, mode, 32);
1437 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1438 struct btrfs_inode_item, rdev, 64);
1439 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1440 struct btrfs_inode_item, flags, 64);
1442 static inline struct btrfs_timespec *
1443 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1445 unsigned long ptr = (unsigned long)inode_item;
1446 ptr += offsetof(struct btrfs_inode_item, atime);
1447 return (struct btrfs_timespec *)ptr;
1450 static inline struct btrfs_timespec *
1451 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1453 unsigned long ptr = (unsigned long)inode_item;
1454 ptr += offsetof(struct btrfs_inode_item, mtime);
1455 return (struct btrfs_timespec *)ptr;
1458 static inline struct btrfs_timespec *
1459 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1461 unsigned long ptr = (unsigned long)inode_item;
1462 ptr += offsetof(struct btrfs_inode_item, ctime);
1463 return (struct btrfs_timespec *)ptr;
1466 static inline struct btrfs_timespec *
1467 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1469 unsigned long ptr = (unsigned long)inode_item;
1470 ptr += offsetof(struct btrfs_inode_item, otime);
1471 return (struct btrfs_timespec *)ptr;
1474 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1475 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1476 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1478 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1481 /* struct btrfs_dev_extent */
1482 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1484 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1485 chunk_objectid, 64);
1486 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1488 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1490 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1492 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1493 return (u8 *)((unsigned long)dev + ptr);
1497 /* struct btrfs_extent_item */
1498 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1499 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1500 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1502 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1503 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1505 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1507 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1509 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1510 struct btrfs_tree_block_info *item,
1511 struct btrfs_disk_key *key)
1513 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1516 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1517 struct btrfs_tree_block_info *item,
1518 struct btrfs_disk_key *key)
1520 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1523 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1525 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1527 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1529 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1532 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1535 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1537 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1539 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1540 struct btrfs_extent_inline_ref, type, 8);
1541 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1542 struct btrfs_extent_inline_ref, offset, 64);
1544 static inline u32 btrfs_extent_inline_ref_size(int type)
1546 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1547 type == BTRFS_SHARED_BLOCK_REF_KEY)
1548 return sizeof(struct btrfs_extent_inline_ref);
1549 if (type == BTRFS_SHARED_DATA_REF_KEY)
1550 return sizeof(struct btrfs_shared_data_ref) +
1551 sizeof(struct btrfs_extent_inline_ref);
1552 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1553 return sizeof(struct btrfs_extent_data_ref) +
1554 offsetof(struct btrfs_extent_inline_ref, offset);
1559 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1560 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1562 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1563 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1565 /* struct btrfs_node */
1566 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1567 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1569 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1572 ptr = offsetof(struct btrfs_node, ptrs) +
1573 sizeof(struct btrfs_key_ptr) * nr;
1574 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1577 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1581 ptr = offsetof(struct btrfs_node, ptrs) +
1582 sizeof(struct btrfs_key_ptr) * nr;
1583 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1586 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1589 ptr = offsetof(struct btrfs_node, ptrs) +
1590 sizeof(struct btrfs_key_ptr) * nr;
1591 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1594 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1598 ptr = offsetof(struct btrfs_node, ptrs) +
1599 sizeof(struct btrfs_key_ptr) * nr;
1600 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1603 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1605 return offsetof(struct btrfs_node, ptrs) +
1606 sizeof(struct btrfs_key_ptr) * nr;
1609 static inline void btrfs_node_key(struct extent_buffer *eb,
1610 struct btrfs_disk_key *disk_key, int nr)
1613 ptr = btrfs_node_key_ptr_offset(nr);
1614 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1615 struct btrfs_key_ptr, key, disk_key);
1618 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1619 struct btrfs_disk_key *disk_key, int nr)
1622 ptr = btrfs_node_key_ptr_offset(nr);
1623 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1624 struct btrfs_key_ptr, key, disk_key);
1627 /* struct btrfs_item */
1628 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1629 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1631 static inline unsigned long btrfs_item_nr_offset(int nr)
1633 return offsetof(struct btrfs_leaf, items) +
1634 sizeof(struct btrfs_item) * nr;
1637 static inline struct btrfs_item *btrfs_item_nr(int nr)
1639 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1642 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1643 struct btrfs_item *item)
1645 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1648 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1650 return btrfs_item_end(eb, btrfs_item_nr(nr));
1653 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1655 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1658 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1660 return btrfs_item_size(eb, btrfs_item_nr(nr));
1663 static inline void btrfs_item_key(struct extent_buffer *eb,
1664 struct btrfs_disk_key *disk_key, int nr)
1666 struct btrfs_item *item = btrfs_item_nr(nr);
1667 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1670 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1671 struct btrfs_disk_key *disk_key, int nr)
1673 struct btrfs_item *item = btrfs_item_nr(nr);
1674 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1677 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1680 * struct btrfs_root_ref
1682 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1683 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1684 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1686 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1687 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1688 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1690 /* struct btrfs_dir_item */
1691 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1692 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1693 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1694 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1696 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1698 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1699 struct btrfs_dir_item *item,
1700 struct btrfs_disk_key *key)
1702 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1705 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1706 struct btrfs_dir_item *item,
1707 struct btrfs_disk_key *key)
1709 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1712 /* struct btrfs_free_space_header */
1713 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1715 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1717 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1720 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1721 struct btrfs_free_space_header *h,
1722 struct btrfs_disk_key *key)
1724 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1727 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1728 struct btrfs_free_space_header *h,
1729 struct btrfs_disk_key *key)
1731 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1734 /* struct btrfs_disk_key */
1735 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1737 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1738 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1740 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1741 struct btrfs_disk_key *disk)
1743 cpu->offset = le64_to_cpu(disk->offset);
1744 cpu->type = disk->type;
1745 cpu->objectid = le64_to_cpu(disk->objectid);
1748 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1749 struct btrfs_key *cpu)
1751 disk->offset = cpu_to_le64(cpu->offset);
1752 disk->type = cpu->type;
1753 disk->objectid = cpu_to_le64(cpu->objectid);
1756 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1757 struct btrfs_key *key, int nr)
1759 struct btrfs_disk_key disk_key;
1760 btrfs_node_key(eb, &disk_key, nr);
1761 btrfs_disk_key_to_cpu(key, &disk_key);
1764 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1765 struct btrfs_key *key, int nr)
1767 struct btrfs_disk_key disk_key;
1768 btrfs_item_key(eb, &disk_key, nr);
1769 btrfs_disk_key_to_cpu(key, &disk_key);
1772 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1773 struct btrfs_dir_item *item,
1774 struct btrfs_key *key)
1776 struct btrfs_disk_key disk_key;
1777 btrfs_dir_item_key(eb, item, &disk_key);
1778 btrfs_disk_key_to_cpu(key, &disk_key);
1782 static inline u8 btrfs_key_type(struct btrfs_key *key)
1787 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1792 /* struct btrfs_header */
1793 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1794 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1796 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1797 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1798 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1799 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1800 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1801 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1803 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1804 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1807 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1809 return (btrfs_header_flags(eb) & flag) == flag;
1812 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1814 u64 flags = btrfs_header_flags(eb);
1815 btrfs_set_header_flags(eb, flags | flag);
1816 return (flags & flag) == flag;
1819 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1821 u64 flags = btrfs_header_flags(eb);
1822 btrfs_set_header_flags(eb, flags & ~flag);
1823 return (flags & flag) == flag;
1826 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1828 u64 flags = btrfs_header_flags(eb);
1829 return flags >> BTRFS_BACKREF_REV_SHIFT;
1832 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1835 u64 flags = btrfs_header_flags(eb);
1836 flags &= ~BTRFS_BACKREF_REV_MASK;
1837 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1838 btrfs_set_header_flags(eb, flags);
1841 static inline unsigned long btrfs_header_fsid(void)
1843 return offsetof(struct btrfs_header, fsid);
1846 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1848 return offsetof(struct btrfs_header, chunk_tree_uuid);
1851 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1853 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1857 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1859 unsigned long ptr = offsetof(struct btrfs_header, csum);
1863 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1868 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1873 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1878 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1880 return (btrfs_header_level(eb) == 0);
1883 /* struct btrfs_root_item */
1884 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1886 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1887 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1888 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1890 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1892 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1893 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1894 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1895 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1896 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1897 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1898 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1899 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1901 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1903 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1905 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1907 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1909 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1912 /* struct btrfs_root_backup */
1913 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1915 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1917 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1918 tree_root_level, 8);
1920 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1922 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1923 chunk_root_gen, 64);
1924 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1925 chunk_root_level, 8);
1927 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1929 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1930 extent_root_gen, 64);
1931 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1932 extent_root_level, 8);
1934 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1936 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1938 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1941 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1943 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1945 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1948 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1950 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1952 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1953 csum_root_level, 8);
1954 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1956 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1958 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1961 /* struct btrfs_super_block */
1963 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1964 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1965 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1967 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1968 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1969 struct btrfs_super_block, sys_chunk_array_size, 32);
1970 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1971 struct btrfs_super_block, chunk_root_generation, 64);
1972 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1974 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1976 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1977 chunk_root_level, 8);
1978 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1980 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1981 log_root_transid, 64);
1982 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1984 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1986 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1988 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1990 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1992 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1994 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1996 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1997 root_dir_objectid, 64);
1998 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2000 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2002 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2003 compat_ro_flags, 64);
2004 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2005 incompat_flags, 64);
2006 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2008 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2009 cache_generation, 64);
2010 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2011 uuid_tree_generation, 64);
2012 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2014 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2016 int t = btrfs_super_csum_type(s);
2017 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2018 return btrfs_csum_sizes[t];
2021 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2023 return offsetof(struct btrfs_leaf, items);
2026 /* struct btrfs_file_extent_item */
2027 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2028 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2030 static inline unsigned long btrfs_file_extent_inline_start(struct
2031 btrfs_file_extent_item *e)
2033 unsigned long offset = (unsigned long)e;
2034 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2038 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2040 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2043 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2045 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2047 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2049 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2051 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2052 disk_num_bytes, 64);
2053 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2055 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2057 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2059 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2061 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2063 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2065 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2067 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2069 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2071 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2072 other_encoding, 16);
2074 /* btrfs_qgroup_status_item */
2075 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2077 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2079 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2081 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2084 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2085 struct btrfs_qgroup_status_item, version, 64);
2086 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2087 struct btrfs_qgroup_status_item, generation, 64);
2088 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2089 struct btrfs_qgroup_status_item, flags, 64);
2090 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
2091 struct btrfs_qgroup_status_item, scan, 64);
2093 /* btrfs_qgroup_info_item */
2094 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2096 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2098 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2099 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2100 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2102 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2103 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2105 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2106 struct btrfs_qgroup_info_item, generation, 64);
2107 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2108 struct btrfs_qgroup_info_item, referenced, 64);
2109 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2110 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2111 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2112 struct btrfs_qgroup_info_item, exclusive, 64);
2113 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2114 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2116 /* btrfs_qgroup_limit_item */
2117 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2119 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2120 max_referenced, 64);
2121 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2123 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2124 rsv_referenced, 64);
2125 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2128 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2129 struct btrfs_qgroup_limit_item, flags, 64);
2130 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2131 struct btrfs_qgroup_limit_item, max_referenced, 64);
2132 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2133 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2134 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2135 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2136 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2137 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2140 * this returns the number of bytes used by the item on disk, minus the
2141 * size of any extent headers. If a file is compressed on disk, this is
2142 * the compressed size
2144 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2145 struct btrfs_item *e)
2147 unsigned long offset;
2148 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2149 return btrfs_item_size(eb, e) - offset;
2152 /* this returns the number of file bytes represented by the inline item.
2153 * If an item is compressed, this is the uncompressed size
2155 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2157 struct btrfs_file_extent_item *fi)
2160 * return the space used on disk if this item isn't
2161 * compressed or encoded
2163 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2164 btrfs_file_extent_encryption(eb, fi) == 0 &&
2165 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2166 return btrfs_file_extent_inline_item_len(eb,
2167 btrfs_item_nr(slot));
2170 /* otherwise use the ram bytes field */
2171 return btrfs_file_extent_ram_bytes(eb, fi);
2174 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2176 return root->leafsize;
2177 return root->nodesize;
2180 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2182 struct btrfs_super_block *disk_super;
2183 disk_super = fs_info->super_copy;
2184 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2187 /* helper function to cast into the data area of the leaf. */
2188 #define btrfs_item_ptr(leaf, slot, type) \
2189 ((type *)(btrfs_leaf_data(leaf) + \
2190 btrfs_item_offset_nr(leaf, slot)))
2192 #define btrfs_item_ptr_offset(leaf, slot) \
2193 ((unsigned long)(btrfs_leaf_data(leaf) + \
2194 btrfs_item_offset_nr(leaf, slot)))
2197 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2198 struct btrfs_root *root,
2199 u64 num_bytes, u64 empty_size,
2200 u64 hint_byte, u64 search_end,
2201 struct btrfs_key *ins, int data);
2202 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2203 struct btrfs_root *root);
2204 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2205 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2206 u64 bytenr, u64 num_bytes);
2207 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2208 struct btrfs_root *root);
2209 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2210 btrfs_fs_info *info,
2212 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2213 btrfs_fs_info *info,
2215 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2216 struct btrfs_root *root,
2217 u32 blocksize, u64 root_objectid,
2218 struct btrfs_disk_key *key, int level,
2219 u64 hint, u64 empty_size);
2220 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2221 struct btrfs_root *root,
2222 u64 num_bytes, u64 parent,
2223 u64 root_objectid, u64 ref_generation,
2224 u64 owner, u64 empty_size, u64 hint_byte,
2225 u64 search_end, struct btrfs_key *ins, int data);
2226 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2227 struct btrfs_root *root, u64 bytenr,
2228 u64 offset, int metadata, u64 *refs, u64 *flags);
2229 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2230 struct btrfs_root *root,
2231 u64 bytenr, int level, u64 flags);
2232 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2233 struct extent_buffer *buf, int record_parent);
2234 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2235 struct extent_buffer *buf, int record_parent);
2236 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root,
2238 u64 bytenr, u64 num_bytes, u64 parent,
2239 u64 root_objectid, u64 owner, u64 offset);
2240 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2241 struct btrfs_root *root,
2242 struct extent_io_tree *unpin);
2243 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2244 struct btrfs_root *root,
2245 u64 bytenr, u64 num_bytes, u64 parent,
2246 u64 root_objectid, u64 ref_generation,
2247 u64 owner_objectid);
2248 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2249 struct btrfs_root *root, u64 bytenr,
2250 u64 orig_parent, u64 parent,
2251 u64 root_objectid, u64 ref_generation,
2252 u64 owner_objectid);
2253 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2254 struct btrfs_root *root);
2255 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2256 int btrfs_read_block_groups(struct btrfs_root *root);
2257 struct btrfs_block_group_cache *
2258 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2259 u64 chunk_objectid, u64 chunk_offset, u64 size);
2260 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2261 struct btrfs_root *root, u64 bytes_used,
2262 u64 type, u64 chunk_objectid, u64 chunk_offset,
2264 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2265 struct btrfs_root *root);
2266 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2267 struct btrfs_root *root, u64 bytenr, u64 num,
2268 int alloc, int mark_free);
2269 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2270 struct btrfs_root *root, u64 objectid,
2271 struct btrfs_inode_item *inode,
2272 u64 file_pos, u64 disk_bytenr,
2275 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2276 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2277 struct btrfs_path *path, int level, int slot);
2278 enum btrfs_tree_block_status
2279 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2280 struct extent_buffer *buf);
2281 enum btrfs_tree_block_status
2282 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2283 struct extent_buffer *buf);
2284 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2285 int level, int slot, u64 objectid);
2286 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2287 struct extent_buffer *parent, int slot);
2288 int btrfs_previous_item(struct btrfs_root *root,
2289 struct btrfs_path *path, u64 min_objectid,
2291 int btrfs_previous_extent_item(struct btrfs_root *root,
2292 struct btrfs_path *path, u64 min_objectid);
2293 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2294 struct btrfs_root *root, struct extent_buffer *buf,
2295 struct extent_buffer *parent, int parent_slot,
2296 struct extent_buffer **cow_ret);
2297 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2298 struct btrfs_root *root,
2299 struct extent_buffer *buf,
2300 struct extent_buffer *parent, int parent_slot,
2301 struct extent_buffer **cow_ret,
2302 u64 search_start, u64 empty_size);
2303 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2304 struct btrfs_root *root,
2305 struct extent_buffer *buf,
2306 struct extent_buffer **cow_ret, u64 new_root_objectid);
2307 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2308 *root, struct btrfs_path *path, u32 data_size);
2309 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2310 struct btrfs_root *root,
2311 struct btrfs_path *path,
2312 u32 new_size, int from_end);
2313 int btrfs_split_item(struct btrfs_trans_handle *trans,
2314 struct btrfs_root *root,
2315 struct btrfs_path *path,
2316 struct btrfs_key *new_key,
2317 unsigned long split_offset);
2318 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2319 *root, struct btrfs_key *key, struct btrfs_path *p, int
2321 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2322 u64 iobjectid, u64 ioff, u8 key_type,
2323 struct btrfs_key *found_key);
2324 void btrfs_release_path(struct btrfs_path *p);
2325 void add_root_to_dirty_list(struct btrfs_root *root);
2326 struct btrfs_path *btrfs_alloc_path(void);
2327 void btrfs_free_path(struct btrfs_path *p);
2328 void btrfs_init_path(struct btrfs_path *p);
2329 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2330 struct btrfs_path *path, int slot, int nr);
2332 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2333 struct btrfs_root *root,
2334 struct btrfs_path *path)
2336 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2339 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2340 *root, struct btrfs_key *key, void *data, u32 data_size);
2341 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2342 struct btrfs_root *root,
2343 struct btrfs_path *path,
2344 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2346 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2347 struct btrfs_root *root,
2348 struct btrfs_path *path,
2349 struct btrfs_key *key,
2352 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2355 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2356 static inline int btrfs_next_item(struct btrfs_root *root,
2357 struct btrfs_path *p)
2360 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2361 return btrfs_next_leaf(root, p);
2365 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2366 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2367 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2368 struct btrfs_disk_key *key, int level);
2369 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2370 struct btrfs_key *new_key);
2371 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2372 struct btrfs_path *path,
2373 struct btrfs_key *new_key);
2376 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2377 struct btrfs_root *tree_root,
2378 u64 root_id, u8 type, u64 ref_id,
2379 u64 dirid, u64 sequence,
2380 const char *name, int name_len);
2381 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2382 *root, struct btrfs_key *key, struct btrfs_root_item
2384 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2385 *root, struct btrfs_key *key, struct btrfs_root_item
2387 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2388 btrfs_root_item *item, struct btrfs_key *key);
2390 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2391 *root, const char *name, int name_len, u64 dir,
2392 struct btrfs_key *location, u8 type, u64 index);
2393 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2394 struct btrfs_root *root,
2395 struct btrfs_path *path, u64 dir,
2396 const char *name, int name_len,
2398 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2399 struct btrfs_root *root,
2400 struct btrfs_path *path, u64 dir,
2401 const char *name, int name_len,
2402 u64 index, int mod);
2403 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2404 struct btrfs_root *root,
2405 struct btrfs_path *path,
2406 struct btrfs_dir_item *di);
2407 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2408 struct btrfs_root *root, const char *name,
2409 u16 name_len, const void *data, u16 data_len,
2412 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *fs_root,
2414 u64 dirid, u64 *objectid);
2417 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2418 struct btrfs_root *root,
2419 const char *name, int name_len,
2420 u64 inode_objectid, u64 ref_objectid, u64 index);
2421 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2422 *root, u64 objectid, struct btrfs_inode_item
2424 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2425 *root, struct btrfs_path *path,
2426 struct btrfs_key *location, int mod);
2427 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2428 *trans, struct btrfs_path *path, struct btrfs_root *root,
2429 u64 ino, u64 parent_ino, u64 index, const char *name,
2430 int namelen, int ins_len);
2431 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2432 struct btrfs_root *root,
2433 const char *name, int name_len,
2434 u64 inode_objectid, u64 ref_objectid,
2436 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2437 struct btrfs_root *root,
2438 const char *name, int name_len,
2439 u64 inode_objectid, u64 ref_objectid, u64 index);
2440 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2441 struct btrfs_root *root, struct btrfs_path *path,
2442 const char *name, int namelen, u64 ino, u64 parent_ino,
2443 u64 index, int ins_len);
2444 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2445 struct btrfs_root *root, const char *name, int name_len,
2446 u64 ino, u64 parent_ino, u64 *index);
2449 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root, u64 bytenr, u64 len);
2451 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2452 struct btrfs_root *root,
2453 u64 objectid, u64 pos, u64 offset,
2456 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2457 struct btrfs_root *root, u64 objectid,
2458 u64 offset, char *buffer, size_t size);
2459 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2460 struct btrfs_root *root, u64 alloc_end,
2461 u64 bytenr, char *data, size_t len);
2462 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2463 struct btrfs_root *root, struct btrfs_path *path,
2467 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2468 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2471 static inline int is_fstree(u64 rootid)
2473 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2474 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2480 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2481 u64 dir, u64 index);
2482 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2484 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2485 u64 ino, u64 parent_ino, char *name, int namelen,
2486 u8 type, u64 *index, int add_backref);
2487 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2488 u64 ino, u64 parent_ino, u64 index, const char *name,
2489 int namelen, int add_orphan);
2490 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2491 struct btrfs_root *root, struct btrfs_path *path,
2493 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2494 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2497 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2498 struct btrfs_root *root,
2499 struct btrfs_path *path,
2500 u64 ino, u64 offset, u64 len, int ins_len);
2501 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2502 struct btrfs_root *root,
2503 u64 ino, u64 offset, u64 len);