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 };
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)
313 #define BTRFS_SUPER_FLAG_CHANGING_FSID (1ULL << 35)
315 #define BTRFS_BACKREF_REV_MAX 256
316 #define BTRFS_BACKREF_REV_SHIFT 56
317 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
318 BTRFS_BACKREF_REV_SHIFT)
320 #define BTRFS_OLD_BACKREF_REV 0
321 #define BTRFS_MIXED_BACKREF_REV 1
324 * every tree block (leaf or node) starts with this header.
326 struct btrfs_header {
327 /* these first four must match the super block */
328 u8 csum[BTRFS_CSUM_SIZE];
329 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
330 __le64 bytenr; /* which block this node is supposed to live in */
333 /* allowed to be different from the super from here on down */
334 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
339 } __attribute__ ((__packed__));
341 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
342 sizeof(struct btrfs_header)) / \
343 sizeof(struct btrfs_key_ptr))
344 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
345 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
346 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
347 sizeof(struct btrfs_item) - \
348 sizeof(struct btrfs_file_extent_item))
349 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
350 sizeof(struct btrfs_item) -\
351 sizeof(struct btrfs_dir_item))
355 * this is a very generous portion of the super block, giving us
356 * room to translate 14 chunks with 3 stripes each.
358 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
359 #define BTRFS_LABEL_SIZE 256
362 * just in case we somehow lose the roots and are not able to mount,
363 * we store an array of the roots from previous transactions
366 #define BTRFS_NUM_BACKUP_ROOTS 4
367 struct btrfs_root_backup {
369 __le64 tree_root_gen;
372 __le64 chunk_root_gen;
375 __le64 extent_root_gen;
384 __le64 csum_root_gen;
394 u8 extent_root_level;
398 /* future and to align */
400 } __attribute__ ((__packed__));
403 * the super block basically lists the main trees of the FS
404 * it currently lacks any block count etc etc
406 struct btrfs_super_block {
407 u8 csum[BTRFS_CSUM_SIZE];
408 /* the first 3 fields must match struct btrfs_header */
409 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
410 __le64 bytenr; /* this block number */
413 /* allowed to be different from the btrfs_header from here own down */
420 /* this will help find the new super based on the log root */
421 __le64 log_root_transid;
424 __le64 root_dir_objectid;
430 __le32 sys_chunk_array_size;
431 __le64 chunk_root_generation;
433 __le64 compat_ro_flags;
434 __le64 incompat_flags;
439 struct btrfs_dev_item dev_item;
441 char label[BTRFS_LABEL_SIZE];
443 __le64 cache_generation;
444 __le64 uuid_tree_generation;
446 /* future expansion */
448 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
449 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
450 } __attribute__ ((__packed__));
453 * Compat flags that we support. If any incompat flags are set other than the
454 * ones specified below then we will fail to mount
456 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
457 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
458 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
459 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
462 * some patches floated around with a second compression method
463 * lets save that incompat here for when they do get in
464 * Note we don't actually support it, we're just reserving the
467 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
470 * older kernels tried to do bigger metadata blocks, but the
471 * code was pretty buggy. Lets not let them try anymore.
473 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
474 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
475 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
476 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
477 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
480 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
481 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
482 #define BTRFS_FEATURE_INCOMPAT_SUPP \
483 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
484 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
485 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
486 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
487 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
488 BTRFS_FEATURE_INCOMPAT_RAID56 | \
489 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
490 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
491 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
494 * A leaf is full of items. offset and size tell us where to find
495 * the item in the leaf (relative to the start of the data area)
498 struct btrfs_disk_key key;
501 } __attribute__ ((__packed__));
504 * leaves have an item area and a data area:
505 * [item0, item1....itemN] [free space] [dataN...data1, data0]
507 * The data is separate from the items to get the keys closer together
511 struct btrfs_header header;
512 struct btrfs_item items[];
513 } __attribute__ ((__packed__));
516 * all non-leaf blocks are nodes, they hold only keys and pointers to
519 struct btrfs_key_ptr {
520 struct btrfs_disk_key key;
523 } __attribute__ ((__packed__));
526 struct btrfs_header header;
527 struct btrfs_key_ptr ptrs[];
528 } __attribute__ ((__packed__));
531 * btrfs_paths remember the path taken from the root down to the leaf.
532 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
533 * to any other levels that are present.
535 * The slots array records the index of the item or block pointer
536 * used while walking the tree.
540 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
541 int slots[BTRFS_MAX_LEVEL];
542 /* if there is real range locking, this locks field will change */
543 int locks[BTRFS_MAX_LEVEL];
545 /* keep some upper locks as we walk down */
549 * set by btrfs_split_item, tells search_slot to keep all locks
550 * and to force calls to keep space in the nodes
552 unsigned int search_for_split:1;
553 unsigned int skip_check_block:1;
557 * items in the extent btree are used to record the objectid of the
558 * owner of the block and the number of references
561 struct btrfs_extent_item {
565 } __attribute__ ((__packed__));
567 struct btrfs_extent_item_v0 {
569 } __attribute__ ((__packed__));
571 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
572 sizeof(struct btrfs_item))
574 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
575 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
577 /* following flags only apply to tree blocks */
579 /* use full backrefs for extent pointers in the block*/
580 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
582 struct btrfs_tree_block_info {
583 struct btrfs_disk_key key;
585 } __attribute__ ((__packed__));
587 struct btrfs_extent_data_ref {
592 } __attribute__ ((__packed__));
594 struct btrfs_shared_data_ref {
596 } __attribute__ ((__packed__));
598 struct btrfs_extent_inline_ref {
601 } __attribute__ ((__packed__));
603 struct btrfs_extent_ref_v0 {
608 } __attribute__ ((__packed__));
610 /* dev extents record free space on individual devices. The owner
611 * field points back to the chunk allocation mapping tree that allocated
612 * the extent. The chunk tree uuid field is a way to double check the owner
614 struct btrfs_dev_extent {
616 __le64 chunk_objectid;
619 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
620 } __attribute__ ((__packed__));
622 struct btrfs_inode_ref {
626 } __attribute__ ((__packed__));
628 struct btrfs_inode_extref {
629 __le64 parent_objectid;
632 __u8 name[0]; /* name goes here */
633 } __attribute__ ((__packed__));
635 struct btrfs_timespec {
638 } __attribute__ ((__packed__));
641 BTRFS_COMPRESS_NONE = 0,
642 BTRFS_COMPRESS_ZLIB = 1,
643 BTRFS_COMPRESS_LZO = 2,
644 BTRFS_COMPRESS_TYPES = 2,
645 BTRFS_COMPRESS_LAST = 3,
646 } btrfs_compression_type;
648 /* we don't understand any encryption methods right now */
650 BTRFS_ENCRYPTION_NONE = 0,
651 BTRFS_ENCRYPTION_LAST = 1,
652 } btrfs_encryption_type;
654 enum btrfs_tree_block_status {
655 BTRFS_TREE_BLOCK_CLEAN,
656 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
657 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
658 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
659 BTRFS_TREE_BLOCK_INVALID_LEVEL,
660 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
661 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
664 struct btrfs_inode_item {
665 /* nfs style generation number */
667 /* transid that last touched this inode */
679 /* modification sequence number for NFS */
683 * a little future expansion, for more than this we can
684 * just grow the inode item and version it
687 struct btrfs_timespec atime;
688 struct btrfs_timespec ctime;
689 struct btrfs_timespec mtime;
690 struct btrfs_timespec otime;
691 } __attribute__ ((__packed__));
693 struct btrfs_dir_log_item {
695 } __attribute__ ((__packed__));
697 struct btrfs_dir_item {
698 struct btrfs_disk_key location;
703 } __attribute__ ((__packed__));
705 struct btrfs_root_item_v0 {
706 struct btrfs_inode_item inode;
712 __le64 last_snapshot;
715 struct btrfs_disk_key drop_progress;
718 } __attribute__ ((__packed__));
720 struct btrfs_root_item {
721 struct btrfs_inode_item inode;
727 __le64 last_snapshot;
730 struct btrfs_disk_key drop_progress;
735 * The following fields appear after subvol_uuids+subvol_times
740 * This generation number is used to test if the new fields are valid
741 * and up to date while reading the root item. Everytime the root item
742 * is written out, the "generation" field is copied into this field. If
743 * anyone ever mounted the fs with an older kernel, we will have
744 * mismatching generation values here and thus must invalidate the
745 * new fields. See btrfs_update_root and btrfs_find_last_root for
747 * the offset of generation_v2 is also used as the start for the memset
748 * when invalidating the fields.
750 __le64 generation_v2;
751 u8 uuid[BTRFS_UUID_SIZE];
752 u8 parent_uuid[BTRFS_UUID_SIZE];
753 u8 received_uuid[BTRFS_UUID_SIZE];
754 __le64 ctransid; /* updated when an inode changes */
755 __le64 otransid; /* trans when created */
756 __le64 stransid; /* trans when sent. non-zero for received subvol */
757 __le64 rtransid; /* trans when received. non-zero for received subvol */
758 struct btrfs_timespec ctime;
759 struct btrfs_timespec otime;
760 struct btrfs_timespec stime;
761 struct btrfs_timespec rtime;
762 __le64 reserved[8]; /* for future */
763 } __attribute__ ((__packed__));
766 * this is used for both forward and backward root refs
768 struct btrfs_root_ref {
772 } __attribute__ ((__packed__));
774 #define BTRFS_FILE_EXTENT_INLINE 0
775 #define BTRFS_FILE_EXTENT_REG 1
776 #define BTRFS_FILE_EXTENT_PREALLOC 2
778 struct btrfs_file_extent_item {
780 * transaction id that created this extent
784 * max number of bytes to hold this extent in ram
785 * when we split a compressed extent we can't know how big
786 * each of the resulting pieces will be. So, this is
787 * an upper limit on the size of the extent in ram instead of
793 * 32 bits for the various ways we might encode the data,
794 * including compression and encryption. If any of these
795 * are set to something a given disk format doesn't understand
796 * it is treated like an incompat flag for reading and writing,
801 __le16 other_encoding; /* spare for later use */
803 /* are we inline data or a real extent? */
807 * disk space consumed by the extent, checksum blocks are included
811 __le64 disk_num_bytes;
813 * the logical offset in file blocks (no csums)
814 * this extent record is for. This allows a file extent to point
815 * into the middle of an existing extent on disk, sharing it
816 * between two snapshots (useful if some bytes in the middle of the
817 * extent have changed
821 * the logical number of file blocks (no csums included)
825 } __attribute__ ((__packed__));
827 struct btrfs_csum_item {
829 } __attribute__ ((__packed__));
832 * We don't want to overwrite 1M at the beginning of device, even though
833 * there is our 1st superblock at 64k. Some possible reasons:
834 * - the first 64k blank is useful for some boot loader/manager
835 * - the first 1M could be scratched by buggy partitioner or somesuch
837 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
839 /* tag for the radix tree of block groups in ram */
840 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
841 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
842 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
843 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
844 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
845 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
846 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
847 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
848 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
849 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
850 #define BTRFS_NR_RAID_TYPES 7
852 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
853 BTRFS_BLOCK_GROUP_SYSTEM | \
854 BTRFS_BLOCK_GROUP_METADATA)
856 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
857 BTRFS_BLOCK_GROUP_RAID1 | \
858 BTRFS_BLOCK_GROUP_RAID5 | \
859 BTRFS_BLOCK_GROUP_RAID6 | \
860 BTRFS_BLOCK_GROUP_DUP | \
861 BTRFS_BLOCK_GROUP_RAID10)
863 /* used in struct btrfs_balance_args fields */
864 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
867 * GLOBAL_RSV does not exist as a on-disk block group type and is used
868 * internally for exporting info about global block reserve from space infos
870 #define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
872 #define BTRFS_QGROUP_LEVEL_SHIFT 48
874 static inline u64 btrfs_qgroup_level(u64 qgroupid)
876 return qgroupid >> BTRFS_QGROUP_LEVEL_SHIFT;
879 static inline u64 btrfs_qgroup_subvid(u64 qgroupid)
881 return qgroupid & ((1ULL << BTRFS_QGROUP_LEVEL_SHIFT) - 1);
884 #define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
885 #define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
886 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
888 struct btrfs_qgroup_status_item {
892 __le64 scan; /* progress during scanning */
893 } __attribute__ ((__packed__));
895 struct btrfs_block_group_item {
897 __le64 chunk_objectid;
899 } __attribute__ ((__packed__));
901 struct btrfs_qgroup_info_item {
904 __le64 referenced_compressed;
906 __le64 exclusive_compressed;
907 } __attribute__ ((__packed__));
909 /* flags definition for qgroup limits */
910 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
911 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
912 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
913 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
914 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
915 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
917 struct btrfs_qgroup_limit_item {
919 __le64 max_referenced;
920 __le64 max_exclusive;
921 __le64 rsv_referenced;
922 __le64 rsv_exclusive;
923 } __attribute__ ((__packed__));
925 struct btrfs_space_info {
931 struct list_head list;
934 struct btrfs_block_group_cache {
935 struct cache_extent cache;
936 struct btrfs_key key;
937 struct btrfs_block_group_item item;
938 struct btrfs_space_info *space_info;
939 struct btrfs_free_space_ctl *free_space_ctl;
947 struct btrfs_extent_ops {
948 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
949 u64 hint_byte, struct btrfs_key *ins);
950 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
955 struct btrfs_fs_devices;
956 struct btrfs_fs_info {
957 u8 fsid[BTRFS_FSID_SIZE];
959 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
960 u8 *new_chunk_tree_uuid;
961 struct btrfs_root *fs_root;
962 struct btrfs_root *extent_root;
963 struct btrfs_root *tree_root;
964 struct btrfs_root *chunk_root;
965 struct btrfs_root *dev_root;
966 struct btrfs_root *csum_root;
967 struct btrfs_root *quota_root;
969 struct rb_root fs_root_tree;
971 /* the log root tree is a directory of all the other log roots */
972 struct btrfs_root *log_root_tree;
974 struct extent_io_tree extent_cache;
975 struct extent_io_tree free_space_cache;
976 struct extent_io_tree block_group_cache;
977 struct extent_io_tree pinned_extents;
978 struct extent_io_tree pending_del;
979 struct extent_io_tree extent_ins;
980 struct extent_io_tree *excluded_extents;
982 /* logical->physical extent mapping */
983 struct btrfs_mapping_tree mapping_tree;
986 u64 last_trans_committed;
988 u64 avail_data_alloc_bits;
989 u64 avail_metadata_alloc_bits;
990 u64 avail_system_alloc_bits;
991 u64 data_alloc_profile;
992 u64 metadata_alloc_profile;
993 u64 system_alloc_profile;
996 struct btrfs_trans_handle *running_transaction;
997 struct btrfs_super_block *super_copy;
998 struct mutex fs_mutex;
1003 struct btrfs_extent_ops *extent_ops;
1004 struct list_head dirty_cowonly_roots;
1005 struct list_head recow_ebs;
1007 struct btrfs_fs_devices *fs_devices;
1008 struct list_head space_info;
1011 unsigned int readonly:1;
1012 unsigned int on_restoring:1;
1013 unsigned int is_chunk_recover:1;
1014 unsigned int quota_enabled:1;
1015 unsigned int suppress_check_block_errors:1;
1016 unsigned int ignore_fsid_mismatch:1;
1018 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
1019 struct btrfs_root *root,
1020 u64 bytenr, u64 num_bytes, u64 parent,
1021 u64 root_objectid, u64 owner, u64 offset,
1023 struct cache_tree *fsck_extent_cache;
1024 struct cache_tree *corrupt_blocks;
1029 * in ram representation of the tree. extent_root is used for all allocations
1030 * and for the extent tree extent_root root.
1033 struct extent_buffer *node;
1034 struct extent_buffer *commit_root;
1035 struct btrfs_root_item root_item;
1036 struct btrfs_key root_key;
1037 struct btrfs_fs_info *fs_info;
1041 /* data allocations are done in sectorsize units */
1044 /* node allocations are done in nodesize units */
1047 /* leaf allocations are done in leafsize units */
1050 /* leaf allocations are done in leafsize units */
1059 u64 last_inode_alloc;
1062 * Record orphan data extent ref
1064 * TODO: Don't restore things in btrfs_root.
1065 * Directly record it into inode_record, which needs a lot of
1066 * infrastructure change to allow cooperation between extent
1069 struct list_head orphan_data_extents;
1071 /* the dirty list is only used by non-reference counted roots */
1072 struct list_head dirty_list;
1073 struct rb_node rb_node;
1077 * inode items have the data typically returned from stat and store other
1078 * info about object characteristics. There is one for every file and dir in
1081 #define BTRFS_INODE_ITEM_KEY 1
1082 #define BTRFS_INODE_REF_KEY 12
1083 #define BTRFS_INODE_EXTREF_KEY 13
1084 #define BTRFS_XATTR_ITEM_KEY 24
1085 #define BTRFS_ORPHAN_ITEM_KEY 48
1087 #define BTRFS_DIR_LOG_ITEM_KEY 60
1088 #define BTRFS_DIR_LOG_INDEX_KEY 72
1090 * dir items are the name -> inode pointers in a directory. There is one
1091 * for every name in a directory.
1093 #define BTRFS_DIR_ITEM_KEY 84
1094 #define BTRFS_DIR_INDEX_KEY 96
1097 * extent data is for file data
1099 #define BTRFS_EXTENT_DATA_KEY 108
1102 * csum items have the checksums for data in the extents
1104 #define BTRFS_CSUM_ITEM_KEY 120
1106 * extent csums are stored in a separate tree and hold csums for
1107 * an entire extent on disk.
1109 #define BTRFS_EXTENT_CSUM_KEY 128
1112 * root items point to tree roots. There are typically in the root
1113 * tree used by the super block to find all the other trees
1115 #define BTRFS_ROOT_ITEM_KEY 132
1118 * root backrefs tie subvols and snapshots to the directory entries that
1121 #define BTRFS_ROOT_BACKREF_KEY 144
1124 * root refs make a fast index for listing all of the snapshots and
1125 * subvolumes referenced by a given root. They point directly to the
1126 * directory item in the root that references the subvol
1128 #define BTRFS_ROOT_REF_KEY 156
1131 * extent items are in the extent map tree. These record which blocks
1132 * are used, and how many references there are to each block
1134 #define BTRFS_EXTENT_ITEM_KEY 168
1137 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1138 * the length, so we save the level in key->offset instead of the length.
1140 #define BTRFS_METADATA_ITEM_KEY 169
1142 #define BTRFS_TREE_BLOCK_REF_KEY 176
1144 #define BTRFS_EXTENT_DATA_REF_KEY 178
1146 /* old style extent backrefs */
1147 #define BTRFS_EXTENT_REF_V0_KEY 180
1149 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1151 #define BTRFS_SHARED_DATA_REF_KEY 184
1155 * block groups give us hints into the extent allocation trees. Which
1156 * blocks are free etc etc
1158 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1160 #define BTRFS_DEV_EXTENT_KEY 204
1161 #define BTRFS_DEV_ITEM_KEY 216
1162 #define BTRFS_CHUNK_ITEM_KEY 228
1164 #define BTRFS_BALANCE_ITEM_KEY 248
1169 #define BTRFS_QGROUP_STATUS_KEY 240
1170 #define BTRFS_QGROUP_INFO_KEY 242
1171 #define BTRFS_QGROUP_LIMIT_KEY 244
1172 #define BTRFS_QGROUP_RELATION_KEY 246
1175 * Persistently stores the io stats in the device tree.
1176 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1178 #define BTRFS_DEV_STATS_KEY 249
1181 * Persistently stores the device replace state in the device tree.
1182 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1184 #define BTRFS_DEV_REPLACE_KEY 250
1187 * Stores items that allow to quickly map UUIDs to something else.
1188 * These items are part of the filesystem UUID tree.
1189 * The key is built like this:
1190 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1192 #if BTRFS_UUID_SIZE != 16
1193 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1195 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1196 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1197 * received subvols */
1200 * string items are for debugging. They just store a short string of
1203 #define BTRFS_STRING_ITEM_KEY 253
1207 #define BTRFS_INODE_NODATASUM (1 << 0)
1208 #define BTRFS_INODE_NODATACOW (1 << 1)
1209 #define BTRFS_INODE_READONLY (1 << 2)
1211 #define read_eb_member(eb, ptr, type, member, result) ( \
1212 read_extent_buffer(eb, (char *)(result), \
1213 ((unsigned long)(ptr)) + \
1214 offsetof(type, member), \
1215 sizeof(((type *)0)->member)))
1217 #define write_eb_member(eb, ptr, type, member, result) ( \
1218 write_extent_buffer(eb, (char *)(result), \
1219 ((unsigned long)(ptr)) + \
1220 offsetof(type, member), \
1221 sizeof(((type *)0)->member)))
1223 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1224 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
1226 const struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1227 return le##bits##_to_cpu(h->member); \
1229 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1232 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1233 h->member = cpu_to_le##bits(val); \
1236 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1237 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
1240 unsigned long offset = (unsigned long)s; \
1241 const type *p = (type *) (eb->data + offset); \
1242 return get_unaligned_le##bits(&p->member); \
1244 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1245 type *s, u##bits val) \
1247 unsigned long offset = (unsigned long)s; \
1248 type *p = (type *) (eb->data + offset); \
1249 put_unaligned_le##bits(val, &p->member); \
1252 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1253 static inline u##bits btrfs_##name(const type *s) \
1255 return le##bits##_to_cpu(s->member); \
1257 static inline void btrfs_set_##name(type *s, u##bits val) \
1259 s->member = cpu_to_le##bits(val); \
1262 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1263 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1264 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1265 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1266 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1267 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1269 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1270 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1271 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1272 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1273 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1274 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1276 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1277 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1279 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1281 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1283 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1285 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1287 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1288 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1290 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1292 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1294 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1297 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1299 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1302 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1304 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1307 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1308 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1309 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1310 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1311 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1312 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1313 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1314 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1315 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1316 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1317 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1319 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1321 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1324 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1325 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1326 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1328 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1330 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1332 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1334 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1335 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1337 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1339 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1340 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1342 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1345 unsigned long offset = (unsigned long)c;
1346 offset += offsetof(struct btrfs_chunk, stripe);
1347 offset += nr * sizeof(struct btrfs_stripe);
1348 return (struct btrfs_stripe *)offset;
1351 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1353 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1356 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1357 struct btrfs_chunk *c, int nr)
1359 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1362 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1363 struct btrfs_chunk *c, int nr,
1366 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1369 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1370 struct btrfs_chunk *c, int nr)
1372 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1375 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1376 struct btrfs_chunk *c, int nr,
1379 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1382 /* struct btrfs_block_group_item */
1383 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1385 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1387 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1388 struct btrfs_block_group_item, chunk_objectid, 64);
1390 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1391 struct btrfs_block_group_item, chunk_objectid, 64);
1392 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1393 struct btrfs_block_group_item, flags, 64);
1394 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1395 struct btrfs_block_group_item, flags, 64);
1397 /* struct btrfs_inode_ref */
1398 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1399 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1400 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1402 /* struct btrfs_inode_extref */
1403 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1404 parent_objectid, 64);
1405 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1407 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1409 /* struct btrfs_inode_item */
1410 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1411 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1412 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1413 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1414 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1415 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1416 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1417 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1418 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1419 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1420 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1421 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1423 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1424 struct btrfs_inode_item, generation, 64);
1425 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1426 struct btrfs_inode_item, generation, 64);
1427 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1428 struct btrfs_inode_item, size, 64);
1429 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1430 struct btrfs_inode_item, nbytes, 64);
1431 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1432 struct btrfs_inode_item, block_group, 64);
1433 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1434 struct btrfs_inode_item, nlink, 32);
1435 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1436 struct btrfs_inode_item, uid, 32);
1437 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1438 struct btrfs_inode_item, gid, 32);
1439 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1440 struct btrfs_inode_item, mode, 32);
1441 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1442 struct btrfs_inode_item, rdev, 64);
1443 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1444 struct btrfs_inode_item, flags, 64);
1446 static inline struct btrfs_timespec *
1447 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1449 unsigned long ptr = (unsigned long)inode_item;
1450 ptr += offsetof(struct btrfs_inode_item, atime);
1451 return (struct btrfs_timespec *)ptr;
1454 static inline struct btrfs_timespec *
1455 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1457 unsigned long ptr = (unsigned long)inode_item;
1458 ptr += offsetof(struct btrfs_inode_item, mtime);
1459 return (struct btrfs_timespec *)ptr;
1462 static inline struct btrfs_timespec *
1463 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1465 unsigned long ptr = (unsigned long)inode_item;
1466 ptr += offsetof(struct btrfs_inode_item, ctime);
1467 return (struct btrfs_timespec *)ptr;
1470 static inline struct btrfs_timespec *
1471 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1473 unsigned long ptr = (unsigned long)inode_item;
1474 ptr += offsetof(struct btrfs_inode_item, otime);
1475 return (struct btrfs_timespec *)ptr;
1478 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1479 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1480 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1482 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1485 /* struct btrfs_dev_extent */
1486 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1488 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1489 chunk_objectid, 64);
1490 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1492 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1494 BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent,
1497 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1499 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1500 return (u8 *)((unsigned long)dev + ptr);
1504 /* struct btrfs_extent_item */
1505 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1506 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1507 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1509 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1510 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1512 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1514 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1516 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1517 struct btrfs_tree_block_info *item,
1518 struct btrfs_disk_key *key)
1520 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1523 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1524 struct btrfs_tree_block_info *item,
1525 struct btrfs_disk_key *key)
1527 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1530 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1532 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1534 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1536 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1539 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1542 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1544 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1546 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1547 struct btrfs_extent_inline_ref, type, 8);
1548 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1549 struct btrfs_extent_inline_ref, offset, 64);
1551 static inline u32 btrfs_extent_inline_ref_size(int type)
1553 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1554 type == BTRFS_SHARED_BLOCK_REF_KEY)
1555 return sizeof(struct btrfs_extent_inline_ref);
1556 if (type == BTRFS_SHARED_DATA_REF_KEY)
1557 return sizeof(struct btrfs_shared_data_ref) +
1558 sizeof(struct btrfs_extent_inline_ref);
1559 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1560 return sizeof(struct btrfs_extent_data_ref) +
1561 offsetof(struct btrfs_extent_inline_ref, offset);
1566 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1567 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1569 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1570 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1572 /* struct btrfs_node */
1573 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1574 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1576 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1579 ptr = offsetof(struct btrfs_node, ptrs) +
1580 sizeof(struct btrfs_key_ptr) * nr;
1581 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1584 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1588 ptr = offsetof(struct btrfs_node, ptrs) +
1589 sizeof(struct btrfs_key_ptr) * nr;
1590 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1593 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1596 ptr = offsetof(struct btrfs_node, ptrs) +
1597 sizeof(struct btrfs_key_ptr) * nr;
1598 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1601 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1605 ptr = offsetof(struct btrfs_node, ptrs) +
1606 sizeof(struct btrfs_key_ptr) * nr;
1607 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1610 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1612 return offsetof(struct btrfs_node, ptrs) +
1613 sizeof(struct btrfs_key_ptr) * nr;
1616 static inline void btrfs_node_key(struct extent_buffer *eb,
1617 struct btrfs_disk_key *disk_key, int nr)
1620 ptr = btrfs_node_key_ptr_offset(nr);
1621 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1622 struct btrfs_key_ptr, key, disk_key);
1625 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1626 struct btrfs_disk_key *disk_key, int nr)
1629 ptr = btrfs_node_key_ptr_offset(nr);
1630 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1631 struct btrfs_key_ptr, key, disk_key);
1634 /* struct btrfs_item */
1635 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1636 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1638 static inline unsigned long btrfs_item_nr_offset(int nr)
1640 return offsetof(struct btrfs_leaf, items) +
1641 sizeof(struct btrfs_item) * nr;
1644 static inline struct btrfs_item *btrfs_item_nr(int nr)
1646 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1649 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1650 struct btrfs_item *item)
1652 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1655 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1657 return btrfs_item_end(eb, btrfs_item_nr(nr));
1660 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1662 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1665 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1667 return btrfs_item_size(eb, btrfs_item_nr(nr));
1670 static inline void btrfs_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 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1677 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1678 struct btrfs_disk_key *disk_key, int nr)
1680 struct btrfs_item *item = btrfs_item_nr(nr);
1681 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1684 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1687 * struct btrfs_root_ref
1689 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1690 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1691 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1693 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1694 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1695 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1697 /* struct btrfs_dir_item */
1698 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1699 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1700 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1701 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1703 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1705 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1706 struct btrfs_dir_item *item,
1707 struct btrfs_disk_key *key)
1709 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1712 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1713 struct btrfs_dir_item *item,
1714 struct btrfs_disk_key *key)
1716 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1719 /* struct btrfs_free_space_header */
1720 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1722 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1724 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1727 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1728 struct btrfs_free_space_header *h,
1729 struct btrfs_disk_key *key)
1731 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1734 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1735 struct btrfs_free_space_header *h,
1736 struct btrfs_disk_key *key)
1738 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1741 /* struct btrfs_disk_key */
1742 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1744 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1745 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1747 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1748 struct btrfs_disk_key *disk)
1750 cpu->offset = le64_to_cpu(disk->offset);
1751 cpu->type = disk->type;
1752 cpu->objectid = le64_to_cpu(disk->objectid);
1755 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1756 struct btrfs_key *cpu)
1758 disk->offset = cpu_to_le64(cpu->offset);
1759 disk->type = cpu->type;
1760 disk->objectid = cpu_to_le64(cpu->objectid);
1763 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1764 struct btrfs_key *key, int nr)
1766 struct btrfs_disk_key disk_key;
1767 btrfs_node_key(eb, &disk_key, nr);
1768 btrfs_disk_key_to_cpu(key, &disk_key);
1771 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1772 struct btrfs_key *key, int nr)
1774 struct btrfs_disk_key disk_key;
1775 btrfs_item_key(eb, &disk_key, nr);
1776 btrfs_disk_key_to_cpu(key, &disk_key);
1779 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1780 struct btrfs_dir_item *item,
1781 struct btrfs_key *key)
1783 struct btrfs_disk_key disk_key;
1784 btrfs_dir_item_key(eb, item, &disk_key);
1785 btrfs_disk_key_to_cpu(key, &disk_key);
1789 static inline u8 btrfs_key_type(struct btrfs_key *key)
1794 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1799 /* struct btrfs_header */
1800 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1801 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1803 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1804 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1805 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1806 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1807 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1808 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1810 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1811 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1814 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1816 return (btrfs_header_flags(eb) & flag) == flag;
1819 static inline int btrfs_set_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_clear_header_flag(struct extent_buffer *eb, u64 flag)
1828 u64 flags = btrfs_header_flags(eb);
1829 btrfs_set_header_flags(eb, flags & ~flag);
1830 return (flags & flag) == flag;
1833 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1835 u64 flags = btrfs_header_flags(eb);
1836 return flags >> BTRFS_BACKREF_REV_SHIFT;
1839 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1842 u64 flags = btrfs_header_flags(eb);
1843 flags &= ~BTRFS_BACKREF_REV_MASK;
1844 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1845 btrfs_set_header_flags(eb, flags);
1848 static inline unsigned long btrfs_header_fsid(void)
1850 return offsetof(struct btrfs_header, fsid);
1853 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1855 return offsetof(struct btrfs_header, chunk_tree_uuid);
1858 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1860 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1864 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1866 unsigned long ptr = offsetof(struct btrfs_header, csum);
1870 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1875 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1880 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1885 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1887 return (btrfs_header_level(eb) == 0);
1890 /* struct btrfs_root_item */
1891 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1893 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1894 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1895 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1897 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1899 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1900 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1901 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1902 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1903 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1904 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1905 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1906 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1908 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1910 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1912 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1914 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1916 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1919 /* struct btrfs_root_backup */
1920 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1922 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1924 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1925 tree_root_level, 8);
1927 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1929 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1930 chunk_root_gen, 64);
1931 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1932 chunk_root_level, 8);
1934 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1936 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1937 extent_root_gen, 64);
1938 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1939 extent_root_level, 8);
1941 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1943 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1945 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1948 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1950 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1952 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1955 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1957 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1959 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1960 csum_root_level, 8);
1961 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1963 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1965 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1968 /* struct btrfs_super_block */
1970 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1971 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1972 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1974 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1975 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1976 struct btrfs_super_block, sys_chunk_array_size, 32);
1977 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1978 struct btrfs_super_block, chunk_root_generation, 64);
1979 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1981 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1983 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1984 chunk_root_level, 8);
1985 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1987 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1988 log_root_transid, 64);
1989 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1991 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1993 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1995 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1997 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1999 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
2001 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
2003 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
2004 root_dir_objectid, 64);
2005 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
2007 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
2009 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
2010 compat_ro_flags, 64);
2011 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
2012 incompat_flags, 64);
2013 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
2015 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
2016 cache_generation, 64);
2017 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
2018 uuid_tree_generation, 64);
2019 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
2021 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
2023 int t = btrfs_super_csum_type(s);
2024 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
2025 return btrfs_csum_sizes[t];
2028 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
2030 return offsetof(struct btrfs_leaf, items);
2033 /* struct btrfs_file_extent_item */
2034 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
2035 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
2037 static inline unsigned long btrfs_file_extent_inline_start(struct
2038 btrfs_file_extent_item *e)
2040 unsigned long offset = (unsigned long)e;
2041 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2045 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2047 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2050 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2052 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2054 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2056 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2058 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2059 disk_num_bytes, 64);
2060 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2062 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2064 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2066 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2068 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2070 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2072 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2074 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2076 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2078 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2079 other_encoding, 16);
2081 /* btrfs_qgroup_status_item */
2082 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2084 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2086 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2088 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2091 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_version,
2092 struct btrfs_qgroup_status_item, version, 64);
2093 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_generation,
2094 struct btrfs_qgroup_status_item, generation, 64);
2095 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_flags,
2096 struct btrfs_qgroup_status_item, flags, 64);
2097 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_status_scan,
2098 struct btrfs_qgroup_status_item, scan, 64);
2100 /* btrfs_qgroup_info_item */
2101 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2103 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2105 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2106 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2107 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2109 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2110 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2112 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2113 struct btrfs_qgroup_info_item, generation, 64);
2114 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2115 struct btrfs_qgroup_info_item, referenced, 64);
2116 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2117 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2118 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2119 struct btrfs_qgroup_info_item, exclusive, 64);
2120 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2121 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2123 /* btrfs_qgroup_limit_item */
2124 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2126 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2127 max_referenced, 64);
2128 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2130 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2131 rsv_referenced, 64);
2132 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2135 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2136 struct btrfs_qgroup_limit_item, flags, 64);
2137 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2138 struct btrfs_qgroup_limit_item, max_referenced, 64);
2139 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2140 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2141 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2142 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2143 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2144 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2147 * this returns the number of bytes used by the item on disk, minus the
2148 * size of any extent headers. If a file is compressed on disk, this is
2149 * the compressed size
2151 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2152 struct btrfs_item *e)
2154 unsigned long offset;
2155 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2156 return btrfs_item_size(eb, e) - offset;
2159 /* this returns the number of file bytes represented by the inline item.
2160 * If an item is compressed, this is the uncompressed size
2162 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2164 struct btrfs_file_extent_item *fi)
2167 * return the space used on disk if this item isn't
2168 * compressed or encoded
2170 if (btrfs_file_extent_compression(eb, fi) == 0 &&
2171 btrfs_file_extent_encryption(eb, fi) == 0 &&
2172 btrfs_file_extent_other_encoding(eb, fi) == 0) {
2173 return btrfs_file_extent_inline_item_len(eb,
2174 btrfs_item_nr(slot));
2177 /* otherwise use the ram bytes field */
2178 return btrfs_file_extent_ram_bytes(eb, fi);
2181 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2183 return root->leafsize;
2184 return root->nodesize;
2187 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2189 struct btrfs_super_block *disk_super;
2190 disk_super = fs_info->super_copy;
2191 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2194 /* helper function to cast into the data area of the leaf. */
2195 #define btrfs_item_ptr(leaf, slot, type) \
2196 ((type *)(btrfs_leaf_data(leaf) + \
2197 btrfs_item_offset_nr(leaf, slot)))
2199 #define btrfs_item_ptr_offset(leaf, slot) \
2200 ((unsigned long)(btrfs_leaf_data(leaf) + \
2201 btrfs_item_offset_nr(leaf, slot)))
2204 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2205 struct btrfs_root *root,
2206 u64 num_bytes, u64 empty_size,
2207 u64 hint_byte, u64 search_end,
2208 struct btrfs_key *ins, int data);
2209 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root);
2211 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2212 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2213 u64 bytenr, u64 num_bytes);
2214 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2215 struct btrfs_root *root);
2216 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2217 btrfs_fs_info *info,
2219 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2220 btrfs_fs_info *info,
2222 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2223 struct btrfs_root *root,
2224 u32 blocksize, u64 root_objectid,
2225 struct btrfs_disk_key *key, int level,
2226 u64 hint, u64 empty_size);
2227 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2228 struct btrfs_root *root,
2229 u64 num_bytes, u64 parent,
2230 u64 root_objectid, u64 ref_generation,
2231 u64 owner, u64 empty_size, u64 hint_byte,
2232 u64 search_end, struct btrfs_key *ins, int data);
2233 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2234 struct btrfs_root *root, u64 bytenr,
2235 u64 offset, int metadata, u64 *refs, u64 *flags);
2236 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2237 struct btrfs_root *root,
2238 u64 bytenr, int level, u64 flags);
2239 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2240 struct extent_buffer *buf, int record_parent);
2241 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2242 struct extent_buffer *buf, int record_parent);
2243 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2244 struct btrfs_root *root,
2245 u64 bytenr, u64 num_bytes, u64 parent,
2246 u64 root_objectid, u64 owner, u64 offset);
2247 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2248 struct btrfs_root *root,
2249 struct extent_io_tree *unpin);
2250 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2251 struct btrfs_root *root,
2252 u64 bytenr, u64 num_bytes, u64 parent,
2253 u64 root_objectid, u64 ref_generation,
2254 u64 owner_objectid);
2255 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *root, u64 bytenr,
2257 u64 orig_parent, u64 parent,
2258 u64 root_objectid, u64 ref_generation,
2259 u64 owner_objectid);
2260 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2261 struct btrfs_root *root);
2262 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2263 int btrfs_read_block_groups(struct btrfs_root *root);
2264 struct btrfs_block_group_cache *
2265 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2266 u64 chunk_objectid, u64 chunk_offset, u64 size);
2267 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2268 struct btrfs_root *root, u64 bytes_used,
2269 u64 type, u64 chunk_objectid, u64 chunk_offset,
2271 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2272 struct btrfs_root *root);
2273 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2274 struct btrfs_root *root, u64 bytenr, u64 num,
2275 int alloc, int mark_free);
2276 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2277 struct btrfs_root *root, u64 objectid,
2278 struct btrfs_inode_item *inode,
2279 u64 file_pos, u64 disk_bytenr,
2281 int btrfs_free_block_group(struct btrfs_trans_handle *trans,
2282 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len);
2284 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2285 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2286 struct btrfs_path *path, int level, int slot);
2287 enum btrfs_tree_block_status
2288 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2289 struct extent_buffer *buf);
2290 enum btrfs_tree_block_status
2291 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2292 struct extent_buffer *buf);
2293 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2294 int level, int slot, u64 objectid);
2295 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2296 struct extent_buffer *parent, int slot);
2297 int btrfs_previous_item(struct btrfs_root *root,
2298 struct btrfs_path *path, u64 min_objectid,
2300 int btrfs_previous_extent_item(struct btrfs_root *root,
2301 struct btrfs_path *path, u64 min_objectid);
2302 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2303 struct btrfs_root *root, struct extent_buffer *buf,
2304 struct extent_buffer *parent, int parent_slot,
2305 struct extent_buffer **cow_ret);
2306 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2307 struct btrfs_root *root,
2308 struct extent_buffer *buf,
2309 struct extent_buffer *parent, int parent_slot,
2310 struct extent_buffer **cow_ret,
2311 u64 search_start, u64 empty_size);
2312 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2313 struct btrfs_root *root,
2314 struct extent_buffer *buf,
2315 struct extent_buffer **cow_ret, u64 new_root_objectid);
2316 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2317 *root, struct btrfs_path *path, u32 data_size);
2318 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2319 struct btrfs_root *root,
2320 struct btrfs_path *path,
2321 u32 new_size, int from_end);
2322 int btrfs_split_item(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root,
2324 struct btrfs_path *path,
2325 struct btrfs_key *new_key,
2326 unsigned long split_offset);
2327 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2328 *root, struct btrfs_key *key, struct btrfs_path *p, int
2330 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *found_path,
2331 u64 iobjectid, u64 ioff, u8 key_type,
2332 struct btrfs_key *found_key);
2333 void btrfs_release_path(struct btrfs_path *p);
2334 void add_root_to_dirty_list(struct btrfs_root *root);
2335 struct btrfs_path *btrfs_alloc_path(void);
2336 void btrfs_free_path(struct btrfs_path *p);
2337 void btrfs_init_path(struct btrfs_path *p);
2338 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2339 struct btrfs_path *path, int slot, int nr);
2341 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2342 struct btrfs_root *root,
2343 struct btrfs_path *path)
2345 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2348 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2349 *root, struct btrfs_key *key, void *data, u32 data_size);
2350 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2351 struct btrfs_root *root,
2352 struct btrfs_path *path,
2353 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2355 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2356 struct btrfs_root *root,
2357 struct btrfs_path *path,
2358 struct btrfs_key *key,
2361 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2364 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2365 static inline int btrfs_next_item(struct btrfs_root *root,
2366 struct btrfs_path *p)
2369 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0]))
2370 return btrfs_next_leaf(root, p);
2374 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2375 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2376 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2377 struct btrfs_disk_key *key, int level);
2378 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2379 struct btrfs_key *new_key);
2380 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2381 struct btrfs_path *path,
2382 struct btrfs_key *new_key);
2385 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2386 struct btrfs_root *tree_root,
2387 u64 root_id, u8 type, u64 ref_id,
2388 u64 dirid, u64 sequence,
2389 const char *name, int name_len);
2390 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2391 *root, struct btrfs_key *key, struct btrfs_root_item
2393 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2394 *root, struct btrfs_key *key, struct btrfs_root_item
2396 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2397 btrfs_root_item *item, struct btrfs_key *key);
2399 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2400 *root, const char *name, int name_len, u64 dir,
2401 struct btrfs_key *location, u8 type, u64 index);
2402 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2403 struct btrfs_root *root,
2404 struct btrfs_path *path, u64 dir,
2405 const char *name, int name_len,
2407 struct btrfs_dir_item *btrfs_lookup_dir_index(struct btrfs_trans_handle *trans,
2408 struct btrfs_root *root,
2409 struct btrfs_path *path, u64 dir,
2410 const char *name, int name_len,
2411 u64 index, int mod);
2412 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2413 struct btrfs_root *root,
2414 struct btrfs_path *path,
2415 struct btrfs_dir_item *di);
2416 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2417 struct btrfs_root *root, const char *name,
2418 u16 name_len, const void *data, u16 data_len,
2421 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2422 struct btrfs_root *fs_root,
2423 u64 dirid, u64 *objectid);
2426 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2427 struct btrfs_root *root,
2428 const char *name, int name_len,
2429 u64 inode_objectid, u64 ref_objectid, u64 index);
2430 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2431 *root, u64 objectid, struct btrfs_inode_item
2433 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2434 *root, struct btrfs_path *path,
2435 struct btrfs_key *location, int mod);
2436 struct btrfs_inode_extref *btrfs_lookup_inode_extref(struct btrfs_trans_handle
2437 *trans, struct btrfs_path *path, struct btrfs_root *root,
2438 u64 ino, u64 parent_ino, u64 index, const char *name,
2439 int namelen, int ins_len);
2440 int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
2441 struct btrfs_root *root,
2442 const char *name, int name_len,
2443 u64 inode_objectid, u64 ref_objectid,
2445 int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
2446 struct btrfs_root *root,
2447 const char *name, int name_len,
2448 u64 inode_objectid, u64 ref_objectid, u64 index);
2449 struct btrfs_inode_ref *btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans,
2450 struct btrfs_root *root, struct btrfs_path *path,
2451 const char *name, int namelen, u64 ino, u64 parent_ino,
2452 u64 index, int ins_len);
2453 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2454 struct btrfs_root *root, const char *name, int name_len,
2455 u64 ino, u64 parent_ino, u64 *index);
2458 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2459 struct btrfs_root *root, u64 bytenr, u64 len);
2460 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2461 struct btrfs_root *root,
2462 u64 objectid, u64 pos, u64 offset,
2465 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2466 struct btrfs_root *root, u64 objectid,
2467 u64 offset, char *buffer, size_t size);
2468 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2469 struct btrfs_root *root, u64 alloc_end,
2470 u64 bytenr, char *data, size_t len);
2471 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2472 struct btrfs_root *root, struct btrfs_path *path,
2476 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2477 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,
2480 static inline int is_fstree(u64 rootid)
2482 if (rootid == BTRFS_FS_TREE_OBJECTID ||
2483 (signed long long)rootid >= (signed long long)BTRFS_FIRST_FREE_OBJECTID)
2489 int check_dir_conflict(struct btrfs_root *root, char *name, int namelen,
2490 u64 dir, u64 index);
2491 int btrfs_new_inode(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2493 int btrfs_add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2494 u64 ino, u64 parent_ino, char *name, int namelen,
2495 u8 type, u64 *index, int add_backref);
2496 int btrfs_unlink(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2497 u64 ino, u64 parent_ino, u64 index, const char *name,
2498 int namelen, int add_orphan);
2499 int btrfs_add_orphan_item(struct btrfs_trans_handle *trans,
2500 struct btrfs_root *root, struct btrfs_path *path,
2502 int btrfs_mkdir(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2503 char *name, int namelen, u64 parent_ino, u64 *ino, int mode);
2506 int btrfs_get_extent(struct btrfs_trans_handle *trans,
2507 struct btrfs_root *root,
2508 struct btrfs_path *path,
2509 u64 ino, u64 offset, u64 len, int ins_len);
2510 int btrfs_punch_hole(struct btrfs_trans_handle *trans,
2511 struct btrfs_root *root,
2512 u64 ino, u64 offset, u64 len);