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.
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 #define BTRFS_MAGIC 0x4D5F53665248425F /* ascii _BHRfS_M, no null */
42 #define BTRFS_MAX_LEVEL 8
44 #define BTRFS_COMPAT_EXTENT_TREE_V0
46 /* holds pointers to all of the tree roots */
47 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
49 /* stores information about which extents are in use, and reference counts */
50 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
53 * chunk tree stores translations from logical -> physical block numbering
54 * the super block points to the chunk tree
56 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
59 * stores information about which areas of a given device are in use.
60 * one per device. The tree of tree roots points to the device tree
62 #define BTRFS_DEV_TREE_OBJECTID 4ULL
64 /* one per subvolume, storing files and directories */
65 #define BTRFS_FS_TREE_OBJECTID 5ULL
67 /* directory objectid inside the root tree */
68 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
69 /* holds checksums of all the data extents */
70 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
71 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
74 /* for storing balance parameters in the root tree */
75 #define BTRFS_BALANCE_OBJECTID -4ULL
77 /* oprhan objectid for tracking unlinked/truncated files */
78 #define BTRFS_ORPHAN_OBJECTID -5ULL
80 /* does write ahead logging to speed up fsyncs */
81 #define BTRFS_TREE_LOG_OBJECTID -6ULL
82 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
85 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
86 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
89 * extent checksums all have this objectid
90 * this allows them to share the logging tree
93 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
95 /* For storing free space cache */
96 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
99 * The inode number assigned to the special inode for sotring
102 #define BTRFS_FREE_INO_OBJECTID -12ULL
104 /* dummy objectid represents multiple objectids */
105 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
108 * All files have objectids in this range.
110 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
111 #define BTRFS_LAST_FREE_OBJECTID -256ULL
112 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
117 * the device items go into the chunk tree. The key is in the form
118 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
120 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
123 * the max metadata block size. This limit is somewhat artificial,
124 * but the memmove costs go through the roof for larger blocks.
126 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
129 * we can actually store much bigger names, but lets not confuse the rest
132 #define BTRFS_NAME_LEN 255
135 * Theoretical limit is larger, but we keep this down to a sane
136 * value. That should limit greatly the possibility of collisions on
139 #define BTRFS_LINK_MAX 65535U
141 /* 32 bytes in various csum fields */
142 #define BTRFS_CSUM_SIZE 32
145 #define BTRFS_CSUM_TYPE_CRC32 0
147 static int btrfs_csum_sizes[] = { 4, 0 };
149 /* four bytes for CRC32 */
150 #define BTRFS_CRC32_SIZE 4
151 #define BTRFS_EMPTY_DIR_SIZE 0
153 #define BTRFS_FT_UNKNOWN 0
154 #define BTRFS_FT_REG_FILE 1
155 #define BTRFS_FT_DIR 2
156 #define BTRFS_FT_CHRDEV 3
157 #define BTRFS_FT_BLKDEV 4
158 #define BTRFS_FT_FIFO 5
159 #define BTRFS_FT_SOCK 6
160 #define BTRFS_FT_SYMLINK 7
161 #define BTRFS_FT_XATTR 8
162 #define BTRFS_FT_MAX 9
164 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
167 * the key defines the order in the tree, and so it also defines (optimal)
168 * block layout. objectid corresonds to the inode number. The flags
169 * tells us things about the object, and is a kind of stream selector.
170 * so for a given inode, keys with flags of 1 might refer to the inode
171 * data, flags of 2 may point to file data in the btree and flags == 3
172 * may point to extents.
174 * offset is the starting byte offset for this key in the stream.
176 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
177 * in cpu native order. Otherwise they are identical and their sizes
178 * should be the same (ie both packed)
180 struct btrfs_disk_key {
184 } __attribute__ ((__packed__));
190 } __attribute__ ((__packed__));
192 struct btrfs_mapping_tree {
193 struct cache_tree cache_tree;
196 #define BTRFS_UUID_SIZE 16
197 struct btrfs_dev_item {
198 /* the internal btrfs device id */
201 /* size of the device */
207 /* optimal io alignment for this device */
210 /* optimal io width for this device */
213 /* minimal io size for this device */
216 /* type and info about this device */
219 /* expected generation for this device */
223 * starting byte of this partition on the device,
224 * to allowr for stripe alignment in the future
228 /* grouping information for allocation decisions */
231 /* seek speed 0-100 where 100 is fastest */
234 /* bandwidth 0-100 where 100 is fastest */
237 /* btrfs generated uuid for this device */
238 u8 uuid[BTRFS_UUID_SIZE];
240 /* uuid of FS who owns this device */
241 u8 fsid[BTRFS_UUID_SIZE];
242 } __attribute__ ((__packed__));
244 struct btrfs_stripe {
247 u8 dev_uuid[BTRFS_UUID_SIZE];
248 } __attribute__ ((__packed__));
251 /* size of this chunk in bytes */
254 /* objectid of the root referencing this chunk */
260 /* optimal io alignment for this chunk */
263 /* optimal io width for this chunk */
266 /* minimal io size for this chunk */
269 /* 2^16 stripes is quite a lot, a second limit is the size of a single
274 /* sub stripes only matter for raid10 */
276 struct btrfs_stripe stripe;
277 /* additional stripes go here */
278 } __attribute__ ((__packed__));
280 struct btrfs_free_space_header {
281 struct btrfs_disk_key location;
285 } __attribute__ ((__packed__));
287 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
289 BUG_ON(num_stripes == 0);
290 return sizeof(struct btrfs_chunk) +
291 sizeof(struct btrfs_stripe) * (num_stripes - 1);
294 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
295 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
296 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
297 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
299 #define BTRFS_BACKREF_REV_MAX 256
300 #define BTRFS_BACKREF_REV_SHIFT 56
301 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
302 BTRFS_BACKREF_REV_SHIFT)
304 #define BTRFS_OLD_BACKREF_REV 0
305 #define BTRFS_MIXED_BACKREF_REV 1
308 * every tree block (leaf or node) starts with this header.
310 struct btrfs_header {
311 /* these first four must match the super block */
312 u8 csum[BTRFS_CSUM_SIZE];
313 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
314 __le64 bytenr; /* which block this node is supposed to live in */
317 /* allowed to be different from the super from here on down */
318 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
323 } __attribute__ ((__packed__));
325 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
326 sizeof(struct btrfs_header)) / \
327 sizeof(struct btrfs_key_ptr))
328 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
329 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
330 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
331 sizeof(struct btrfs_item) - \
332 sizeof(struct btrfs_file_extent_item))
333 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
334 sizeof(struct btrfs_item) -\
335 sizeof(struct btrfs_dir_item))
339 * this is a very generous portion of the super block, giving us
340 * room to translate 14 chunks with 3 stripes each.
342 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
343 #define BTRFS_LABEL_SIZE 256
346 * just in case we somehow lose the roots and are not able to mount,
347 * we store an array of the roots from previous transactions
350 #define BTRFS_NUM_BACKUP_ROOTS 4
351 struct btrfs_root_backup {
353 __le64 tree_root_gen;
356 __le64 chunk_root_gen;
359 __le64 extent_root_gen;
368 __le64 csum_root_gen;
378 u8 extent_root_level;
382 /* future and to align */
384 } __attribute__ ((__packed__));
387 * the super block basically lists the main trees of the FS
388 * it currently lacks any block count etc etc
390 struct btrfs_super_block {
391 u8 csum[BTRFS_CSUM_SIZE];
392 /* the first 3 fields must match struct btrfs_header */
393 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
394 __le64 bytenr; /* this block number */
397 /* allowed to be different from the btrfs_header from here own down */
404 /* this will help find the new super based on the log root */
405 __le64 log_root_transid;
408 __le64 root_dir_objectid;
414 __le32 sys_chunk_array_size;
415 __le64 chunk_root_generation;
417 __le64 compat_ro_flags;
418 __le64 incompat_flags;
423 struct btrfs_dev_item dev_item;
425 char label[BTRFS_LABEL_SIZE];
427 __le64 cache_generation;
429 /* future expansion */
431 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
432 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
433 } __attribute__ ((__packed__));
436 * Compat flags that we support. If any incompat flags are set other than the
437 * ones specified below then we will fail to mount
439 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
440 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
441 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
442 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
445 * some patches floated around with a second compression method
446 * lets save that incompat here for when they do get in
447 * Note we don't actually support it, we're just reserving the
450 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
453 * older kernels tried to do bigger metadata blocks, but the
454 * code was pretty buggy. Lets not let them try anymore.
456 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
457 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
459 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
461 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
462 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
463 #define BTRFS_FEATURE_INCOMPAT_SUPP \
464 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
465 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
466 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
467 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
468 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
469 BTRFS_FEATURE_INCOMPAT_RAID56 | \
470 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
473 * A leaf is full of items. offset and size tell us where to find
474 * the item in the leaf (relative to the start of the data area)
477 struct btrfs_disk_key key;
480 } __attribute__ ((__packed__));
483 * leaves have an item area and a data area:
484 * [item0, item1....itemN] [free space] [dataN...data1, data0]
486 * The data is separate from the items to get the keys closer together
490 struct btrfs_header header;
491 struct btrfs_item items[];
492 } __attribute__ ((__packed__));
495 * all non-leaf blocks are nodes, they hold only keys and pointers to
498 struct btrfs_key_ptr {
499 struct btrfs_disk_key key;
502 } __attribute__ ((__packed__));
505 struct btrfs_header header;
506 struct btrfs_key_ptr ptrs[];
507 } __attribute__ ((__packed__));
510 * btrfs_paths remember the path taken from the root down to the leaf.
511 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
512 * to any other levels that are present.
514 * The slots array records the index of the item or block pointer
515 * used while walking the tree.
519 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
520 int slots[BTRFS_MAX_LEVEL];
521 /* if there is real range locking, this locks field will change */
522 int locks[BTRFS_MAX_LEVEL];
524 /* keep some upper locks as we walk down */
528 * set by btrfs_split_item, tells search_slot to keep all locks
529 * and to force calls to keep space in the nodes
531 unsigned int search_for_split:1;
532 unsigned int keep_locks:1;
533 unsigned int skip_locking:1;
534 unsigned int leave_spinning:1;
538 * items in the extent btree are used to record the objectid of the
539 * owner of the block and the number of references
542 struct btrfs_extent_item {
546 } __attribute__ ((__packed__));
548 struct btrfs_extent_item_v0 {
550 } __attribute__ ((__packed__));
552 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
553 sizeof(struct btrfs_item))
555 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
556 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
558 /* following flags only apply to tree blocks */
560 /* use full backrefs for extent pointers in the block*/
561 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
563 struct btrfs_tree_block_info {
564 struct btrfs_disk_key key;
566 } __attribute__ ((__packed__));
568 struct btrfs_extent_data_ref {
573 } __attribute__ ((__packed__));
575 struct btrfs_shared_data_ref {
577 } __attribute__ ((__packed__));
579 struct btrfs_extent_inline_ref {
582 } __attribute__ ((__packed__));
584 struct btrfs_extent_ref_v0 {
589 } __attribute__ ((__packed__));
591 /* dev extents record free space on individual devices. The owner
592 * field points back to the chunk allocation mapping tree that allocated
593 * the extent. The chunk tree uuid field is a way to double check the owner
595 struct btrfs_dev_extent {
597 __le64 chunk_objectid;
600 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
601 } __attribute__ ((__packed__));
603 struct btrfs_inode_ref {
607 } __attribute__ ((__packed__));
609 struct btrfs_inode_extref {
610 __le64 parent_objectid;
613 __u8 name[0]; /* name goes here */
614 } __attribute__ ((__packed__));
616 struct btrfs_timespec {
619 } __attribute__ ((__packed__));
622 BTRFS_COMPRESS_NONE = 0,
623 BTRFS_COMPRESS_ZLIB = 1,
624 BTRFS_COMPRESS_LZO = 2,
625 BTRFS_COMPRESS_TYPES = 2,
626 BTRFS_COMPRESS_LAST = 3,
627 } btrfs_compression_type;
629 /* we don't understand any encryption methods right now */
631 BTRFS_ENCRYPTION_NONE = 0,
632 BTRFS_ENCRYPTION_LAST = 1,
633 } btrfs_encryption_type;
635 struct btrfs_inode_item {
636 /* nfs style generation number */
638 /* transid that last touched this inode */
650 /* modification sequence number for NFS */
654 * a little future expansion, for more than this we can
655 * just grow the inode item and version it
658 struct btrfs_timespec atime;
659 struct btrfs_timespec ctime;
660 struct btrfs_timespec mtime;
661 struct btrfs_timespec otime;
662 } __attribute__ ((__packed__));
664 struct btrfs_dir_log_item {
666 } __attribute__ ((__packed__));
668 struct btrfs_dir_item {
669 struct btrfs_disk_key location;
674 } __attribute__ ((__packed__));
676 struct btrfs_root_item_v0 {
677 struct btrfs_inode_item inode;
683 __le64 last_snapshot;
686 struct btrfs_disk_key drop_progress;
689 } __attribute__ ((__packed__));
691 struct btrfs_root_item {
692 struct btrfs_inode_item inode;
698 __le64 last_snapshot;
701 struct btrfs_disk_key drop_progress;
706 * The following fields appear after subvol_uuids+subvol_times
711 * This generation number is used to test if the new fields are valid
712 * and up to date while reading the root item. Everytime the root item
713 * is written out, the "generation" field is copied into this field. If
714 * anyone ever mounted the fs with an older kernel, we will have
715 * mismatching generation values here and thus must invalidate the
716 * new fields. See btrfs_update_root and btrfs_find_last_root for
718 * the offset of generation_v2 is also used as the start for the memset
719 * when invalidating the fields.
721 __le64 generation_v2;
722 u8 uuid[BTRFS_UUID_SIZE];
723 u8 parent_uuid[BTRFS_UUID_SIZE];
724 u8 received_uuid[BTRFS_UUID_SIZE];
725 __le64 ctransid; /* updated when an inode changes */
726 __le64 otransid; /* trans when created */
727 __le64 stransid; /* trans when sent. non-zero for received subvol */
728 __le64 rtransid; /* trans when received. non-zero for received subvol */
729 struct btrfs_timespec ctime;
730 struct btrfs_timespec otime;
731 struct btrfs_timespec stime;
732 struct btrfs_timespec rtime;
733 __le64 reserved[8]; /* for future */
734 } __attribute__ ((__packed__));
737 * this is used for both forward and backward root refs
739 struct btrfs_root_ref {
743 } __attribute__ ((__packed__));
745 #define BTRFS_FILE_EXTENT_INLINE 0
746 #define BTRFS_FILE_EXTENT_REG 1
747 #define BTRFS_FILE_EXTENT_PREALLOC 2
749 struct btrfs_file_extent_item {
751 * transaction id that created this extent
755 * max number of bytes to hold this extent in ram
756 * when we split a compressed extent we can't know how big
757 * each of the resulting pieces will be. So, this is
758 * an upper limit on the size of the extent in ram instead of
764 * 32 bits for the various ways we might encode the data,
765 * including compression and encryption. If any of these
766 * are set to something a given disk format doesn't understand
767 * it is treated like an incompat flag for reading and writing,
772 __le16 other_encoding; /* spare for later use */
774 /* are we inline data or a real extent? */
778 * disk space consumed by the extent, checksum blocks are included
782 __le64 disk_num_bytes;
784 * the logical offset in file blocks (no csums)
785 * this extent record is for. This allows a file extent to point
786 * into the middle of an existing extent on disk, sharing it
787 * between two snapshots (useful if some bytes in the middle of the
788 * extent have changed
792 * the logical number of file blocks (no csums included)
796 } __attribute__ ((__packed__));
798 struct btrfs_csum_item {
800 } __attribute__ ((__packed__));
802 /* tag for the radix tree of block groups in ram */
803 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
804 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
805 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
806 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
807 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
808 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
809 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
810 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
811 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
812 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
814 /* used in struct btrfs_balance_args fields */
815 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
817 #define BTRFS_QGROUP_STATUS_OFF 0
818 #define BTRFS_QGROUP_STATUS_ON 1
819 #define BTRFS_QGROUP_STATUS_SCANNING 2
821 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
823 struct btrfs_qgroup_status_item {
827 __le64 scan; /* progress during scanning */
828 } __attribute__ ((__packed__));
830 struct btrfs_block_group_item {
832 __le64 chunk_objectid;
834 } __attribute__ ((__packed__));
836 struct btrfs_qgroup_info_item {
839 __le64 referenced_compressed;
841 __le64 exclusive_compressed;
842 } __attribute__ ((__packed__));
844 /* flags definition for qgroup limits */
845 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
846 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
847 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
848 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
849 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
850 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
852 struct btrfs_qgroup_limit_item {
854 __le64 max_referenced;
855 __le64 max_exclusive;
856 __le64 rsv_referenced;
857 __le64 rsv_exclusive;
858 } __attribute__ ((__packed__));
860 struct btrfs_space_info {
866 struct list_head list;
869 struct btrfs_block_group_cache {
870 struct cache_extent cache;
871 struct btrfs_key key;
872 struct btrfs_block_group_item item;
873 struct btrfs_space_info *space_info;
880 struct btrfs_extent_ops {
881 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
882 u64 hint_byte, struct btrfs_key *ins);
883 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
888 struct btrfs_fs_devices;
889 struct btrfs_fs_info {
890 u8 fsid[BTRFS_FSID_SIZE];
891 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
892 struct btrfs_root *fs_root;
893 struct btrfs_root *extent_root;
894 struct btrfs_root *tree_root;
895 struct btrfs_root *chunk_root;
896 struct btrfs_root *dev_root;
897 struct btrfs_root *csum_root;
899 struct cache_tree fs_root_cache;
901 /* the log root tree is a directory of all the other log roots */
902 struct btrfs_root *log_root_tree;
904 struct extent_io_tree extent_cache;
905 struct extent_io_tree free_space_cache;
906 struct extent_io_tree block_group_cache;
907 struct extent_io_tree pinned_extents;
908 struct extent_io_tree pending_del;
909 struct extent_io_tree extent_ins;
911 /* logical->physical extent mapping */
912 struct btrfs_mapping_tree mapping_tree;
915 u64 last_trans_committed;
917 u64 avail_data_alloc_bits;
918 u64 avail_metadata_alloc_bits;
919 u64 avail_system_alloc_bits;
920 u64 data_alloc_profile;
921 u64 metadata_alloc_profile;
922 u64 system_alloc_profile;
925 struct btrfs_trans_handle *running_transaction;
926 struct btrfs_super_block super_copy;
927 struct mutex fs_mutex;
932 struct btrfs_extent_ops *extent_ops;
933 struct list_head dirty_cowonly_roots;
935 struct btrfs_fs_devices *fs_devices;
936 struct list_head space_info;
939 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
940 struct btrfs_root *root,
941 u64 bytenr, u64 num_bytes, u64 parent,
942 u64 root_objectid, u64 owner, u64 offset,
944 struct cache_tree *fsck_extent_cache;
945 struct cache_tree *corrupt_blocks;
949 * in ram representation of the tree. extent_root is used for all allocations
950 * and for the extent tree extent_root root.
953 struct extent_buffer *node;
954 struct extent_buffer *commit_root;
955 struct btrfs_root_item root_item;
956 struct btrfs_key root_key;
957 struct btrfs_fs_info *fs_info;
961 /* data allocations are done in sectorsize units */
964 /* node allocations are done in nodesize units */
967 /* leaf allocations are done in leafsize units */
970 /* leaf allocations are done in leafsize units */
979 u64 last_inode_alloc;
981 /* the dirty list is only used by non-reference counted roots */
982 struct list_head dirty_list;
983 struct cache_extent cache;
987 * inode items have the data typically returned from stat and store other
988 * info about object characteristics. There is one for every file and dir in
991 #define BTRFS_INODE_ITEM_KEY 1
992 #define BTRFS_INODE_REF_KEY 12
993 #define BTRFS_INODE_EXTREF_KEY 13
994 #define BTRFS_XATTR_ITEM_KEY 24
995 #define BTRFS_ORPHAN_ITEM_KEY 48
997 #define BTRFS_DIR_LOG_ITEM_KEY 60
998 #define BTRFS_DIR_LOG_INDEX_KEY 72
1000 * dir items are the name -> inode pointers in a directory. There is one
1001 * for every name in a directory.
1003 #define BTRFS_DIR_ITEM_KEY 84
1004 #define BTRFS_DIR_INDEX_KEY 96
1007 * extent data is for file data
1009 #define BTRFS_EXTENT_DATA_KEY 108
1012 * csum items have the checksums for data in the extents
1014 #define BTRFS_CSUM_ITEM_KEY 120
1016 * extent csums are stored in a separate tree and hold csums for
1017 * an entire extent on disk.
1019 #define BTRFS_EXTENT_CSUM_KEY 128
1022 * root items point to tree roots. There are typically in the root
1023 * tree used by the super block to find all the other trees
1025 #define BTRFS_ROOT_ITEM_KEY 132
1028 * root backrefs tie subvols and snapshots to the directory entries that
1031 #define BTRFS_ROOT_BACKREF_KEY 144
1034 * root refs make a fast index for listing all of the snapshots and
1035 * subvolumes referenced by a given root. They point directly to the
1036 * directory item in the root that references the subvol
1038 #define BTRFS_ROOT_REF_KEY 156
1041 * extent items are in the extent map tree. These record which blocks
1042 * are used, and how many references there are to each block
1044 #define BTRFS_EXTENT_ITEM_KEY 168
1046 #define BTRFS_TREE_BLOCK_REF_KEY 176
1048 #define BTRFS_EXTENT_DATA_REF_KEY 178
1050 /* old style extent backrefs */
1051 #define BTRFS_EXTENT_REF_V0_KEY 180
1053 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1055 #define BTRFS_SHARED_DATA_REF_KEY 184
1059 * block groups give us hints into the extent allocation trees. Which
1060 * blocks are free etc etc
1062 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1064 #define BTRFS_DEV_EXTENT_KEY 204
1065 #define BTRFS_DEV_ITEM_KEY 216
1066 #define BTRFS_CHUNK_ITEM_KEY 228
1068 #define BTRFS_BALANCE_ITEM_KEY 248
1073 #define BTRFS_QGROUP_STATUS_KEY 240
1074 #define BTRFS_QGROUP_INFO_KEY 242
1075 #define BTRFS_QGROUP_LIMIT_KEY 244
1076 #define BTRFS_QGROUP_RELATION_KEY 246
1079 * Persistently stores the io stats in the device tree.
1080 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1082 #define BTRFS_DEV_STATS_KEY 249
1085 * Persistently stores the device replace state in the device tree.
1086 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1088 #define BTRFS_DEV_REPLACE_KEY 250
1091 * string items are for debugging. They just store a short string of
1094 #define BTRFS_STRING_ITEM_KEY 253
1098 #define BTRFS_INODE_NODATASUM (1 << 0)
1099 #define BTRFS_INODE_NODATACOW (1 << 1)
1100 #define BTRFS_INODE_READONLY (1 << 2)
1102 #define read_eb_member(eb, ptr, type, member, result) ( \
1103 read_extent_buffer(eb, (char *)(result), \
1104 ((unsigned long)(ptr)) + \
1105 offsetof(type, member), \
1106 sizeof(((type *)0)->member)))
1108 #define write_eb_member(eb, ptr, type, member, result) ( \
1109 write_extent_buffer(eb, (char *)(result), \
1110 ((unsigned long)(ptr)) + \
1111 offsetof(type, member), \
1112 sizeof(((type *)0)->member)))
1114 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1115 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1117 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1118 return le##bits##_to_cpu(h->member); \
1120 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1123 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1124 h->member = cpu_to_le##bits(val); \
1127 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1128 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1131 unsigned long offset = (unsigned long)s; \
1132 type *p = (type *) (eb->data + offset); \
1133 return get_unaligned_le##bits(&p->member); \
1135 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1136 type *s, u##bits val) \
1138 unsigned long offset = (unsigned long)s; \
1139 type *p = (type *) (eb->data + offset); \
1140 put_unaligned_le##bits(val, &p->member); \
1143 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1144 static inline u##bits btrfs_##name(type *s) \
1146 return le##bits##_to_cpu(s->member); \
1148 static inline void btrfs_set_##name(type *s, u##bits val) \
1150 s->member = cpu_to_le##bits(val); \
1153 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1154 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1155 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1156 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1157 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1158 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1160 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1161 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1162 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1163 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1164 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1165 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1167 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1168 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1170 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1172 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1174 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1176 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1178 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1179 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1181 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1183 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1185 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1188 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1190 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1193 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1195 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1198 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1199 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1200 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1201 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1202 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1203 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1204 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1205 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1206 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1207 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1208 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1210 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1212 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1215 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1216 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1217 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1219 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1221 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1223 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1225 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1226 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1228 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1230 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1231 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1233 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1236 unsigned long offset = (unsigned long)c;
1237 offset += offsetof(struct btrfs_chunk, stripe);
1238 offset += nr * sizeof(struct btrfs_stripe);
1239 return (struct btrfs_stripe *)offset;
1242 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1244 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1247 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1248 struct btrfs_chunk *c, int nr)
1250 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1253 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1254 struct btrfs_chunk *c, int nr,
1257 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1260 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1261 struct btrfs_chunk *c, int nr)
1263 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1266 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1267 struct btrfs_chunk *c, int nr,
1270 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1273 /* struct btrfs_block_group_item */
1274 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1276 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1278 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1279 struct btrfs_block_group_item, chunk_objectid, 64);
1281 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1282 struct btrfs_block_group_item, chunk_objectid, 64);
1283 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1284 struct btrfs_block_group_item, flags, 64);
1285 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1286 struct btrfs_block_group_item, flags, 64);
1288 /* struct btrfs_inode_ref */
1289 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1290 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1291 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1293 /* struct btrfs_inode_extref */
1294 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1295 parent_objectid, 64);
1296 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1298 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1300 /* struct btrfs_inode_item */
1301 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1302 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1303 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1304 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1305 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1306 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1307 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1308 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1309 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1310 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1311 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1312 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1314 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1315 struct btrfs_inode_item, generation, 64);
1316 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1317 struct btrfs_inode_item, generation, 64);
1318 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1319 struct btrfs_inode_item, size, 64);
1320 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1321 struct btrfs_inode_item, nbytes, 64);
1322 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1323 struct btrfs_inode_item, block_group, 64);
1324 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1325 struct btrfs_inode_item, nlink, 32);
1326 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1327 struct btrfs_inode_item, uid, 32);
1328 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1329 struct btrfs_inode_item, gid, 32);
1330 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1331 struct btrfs_inode_item, mode, 32);
1332 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1333 struct btrfs_inode_item, rdev, 64);
1334 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1335 struct btrfs_inode_item, flags, 64);
1337 static inline struct btrfs_timespec *
1338 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1340 unsigned long ptr = (unsigned long)inode_item;
1341 ptr += offsetof(struct btrfs_inode_item, atime);
1342 return (struct btrfs_timespec *)ptr;
1345 static inline struct btrfs_timespec *
1346 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1348 unsigned long ptr = (unsigned long)inode_item;
1349 ptr += offsetof(struct btrfs_inode_item, mtime);
1350 return (struct btrfs_timespec *)ptr;
1353 static inline struct btrfs_timespec *
1354 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1356 unsigned long ptr = (unsigned long)inode_item;
1357 ptr += offsetof(struct btrfs_inode_item, ctime);
1358 return (struct btrfs_timespec *)ptr;
1361 static inline struct btrfs_timespec *
1362 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1364 unsigned long ptr = (unsigned long)inode_item;
1365 ptr += offsetof(struct btrfs_inode_item, otime);
1366 return (struct btrfs_timespec *)ptr;
1369 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1370 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1371 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1373 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1376 /* struct btrfs_dev_extent */
1377 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1379 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1380 chunk_objectid, 64);
1381 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1383 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1385 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1387 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1388 return (u8 *)((unsigned long)dev + ptr);
1392 /* struct btrfs_extent_item */
1393 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1394 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1396 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1398 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1400 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1402 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1403 struct btrfs_tree_block_info *item,
1404 struct btrfs_disk_key *key)
1406 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1409 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1410 struct btrfs_tree_block_info *item,
1411 struct btrfs_disk_key *key)
1413 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1416 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1418 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1420 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1422 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1425 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1428 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1430 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1433 static inline u32 btrfs_extent_inline_ref_size(int type)
1435 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1436 type == BTRFS_SHARED_BLOCK_REF_KEY)
1437 return sizeof(struct btrfs_extent_inline_ref);
1438 if (type == BTRFS_SHARED_DATA_REF_KEY)
1439 return sizeof(struct btrfs_shared_data_ref) +
1440 sizeof(struct btrfs_extent_inline_ref);
1441 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1442 return sizeof(struct btrfs_extent_data_ref) +
1443 offsetof(struct btrfs_extent_inline_ref, offset);
1448 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1449 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1451 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1452 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1454 /* struct btrfs_node */
1455 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1456 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1458 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1461 ptr = offsetof(struct btrfs_node, ptrs) +
1462 sizeof(struct btrfs_key_ptr) * nr;
1463 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1466 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1470 ptr = offsetof(struct btrfs_node, ptrs) +
1471 sizeof(struct btrfs_key_ptr) * nr;
1472 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1475 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1478 ptr = offsetof(struct btrfs_node, ptrs) +
1479 sizeof(struct btrfs_key_ptr) * nr;
1480 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1483 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1487 ptr = offsetof(struct btrfs_node, ptrs) +
1488 sizeof(struct btrfs_key_ptr) * nr;
1489 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1492 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1494 return offsetof(struct btrfs_node, ptrs) +
1495 sizeof(struct btrfs_key_ptr) * nr;
1498 static inline void btrfs_node_key(struct extent_buffer *eb,
1499 struct btrfs_disk_key *disk_key, int nr)
1502 ptr = btrfs_node_key_ptr_offset(nr);
1503 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1504 struct btrfs_key_ptr, key, disk_key);
1507 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1508 struct btrfs_disk_key *disk_key, int nr)
1511 ptr = btrfs_node_key_ptr_offset(nr);
1512 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1513 struct btrfs_key_ptr, key, disk_key);
1516 /* struct btrfs_item */
1517 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1518 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1520 static inline unsigned long btrfs_item_nr_offset(int nr)
1522 return offsetof(struct btrfs_leaf, items) +
1523 sizeof(struct btrfs_item) * nr;
1526 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb,
1529 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1532 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1533 struct btrfs_item *item)
1535 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1538 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1540 return btrfs_item_end(eb, btrfs_item_nr(eb, nr));
1543 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1545 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr));
1548 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1550 return btrfs_item_size(eb, btrfs_item_nr(eb, nr));
1553 static inline void btrfs_item_key(struct extent_buffer *eb,
1554 struct btrfs_disk_key *disk_key, int nr)
1556 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1557 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1560 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1561 struct btrfs_disk_key *disk_key, int nr)
1563 struct btrfs_item *item = btrfs_item_nr(eb, nr);
1564 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1567 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1570 * struct btrfs_root_ref
1572 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1573 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1574 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1576 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1577 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1578 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1580 /* struct btrfs_dir_item */
1581 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1582 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1583 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1584 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1586 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1588 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1589 struct btrfs_dir_item *item,
1590 struct btrfs_disk_key *key)
1592 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1595 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1596 struct btrfs_dir_item *item,
1597 struct btrfs_disk_key *key)
1599 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1602 /* struct btrfs_free_space_header */
1603 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1605 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1607 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1610 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1611 struct btrfs_free_space_header *h,
1612 struct btrfs_disk_key *key)
1614 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1617 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1618 struct btrfs_free_space_header *h,
1619 struct btrfs_disk_key *key)
1621 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1624 /* struct btrfs_disk_key */
1625 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1627 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1628 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1630 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1631 struct btrfs_disk_key *disk)
1633 cpu->offset = le64_to_cpu(disk->offset);
1634 cpu->type = disk->type;
1635 cpu->objectid = le64_to_cpu(disk->objectid);
1638 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1639 struct btrfs_key *cpu)
1641 disk->offset = cpu_to_le64(cpu->offset);
1642 disk->type = cpu->type;
1643 disk->objectid = cpu_to_le64(cpu->objectid);
1646 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1647 struct btrfs_key *key, int nr)
1649 struct btrfs_disk_key disk_key;
1650 btrfs_node_key(eb, &disk_key, nr);
1651 btrfs_disk_key_to_cpu(key, &disk_key);
1654 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1655 struct btrfs_key *key, int nr)
1657 struct btrfs_disk_key disk_key;
1658 btrfs_item_key(eb, &disk_key, nr);
1659 btrfs_disk_key_to_cpu(key, &disk_key);
1662 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1663 struct btrfs_dir_item *item,
1664 struct btrfs_key *key)
1666 struct btrfs_disk_key disk_key;
1667 btrfs_dir_item_key(eb, item, &disk_key);
1668 btrfs_disk_key_to_cpu(key, &disk_key);
1672 static inline u8 btrfs_key_type(struct btrfs_key *key)
1677 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1682 /* struct btrfs_header */
1683 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1684 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1686 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1687 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1688 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1689 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1691 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1693 return (btrfs_header_flags(eb) & flag) == flag;
1696 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1698 u64 flags = btrfs_header_flags(eb);
1699 btrfs_set_header_flags(eb, flags | flag);
1700 return (flags & flag) == flag;
1703 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1705 u64 flags = btrfs_header_flags(eb);
1706 btrfs_set_header_flags(eb, flags & ~flag);
1707 return (flags & flag) == flag;
1710 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1712 u64 flags = btrfs_header_flags(eb);
1713 return flags >> BTRFS_BACKREF_REV_SHIFT;
1716 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1719 u64 flags = btrfs_header_flags(eb);
1720 flags &= ~BTRFS_BACKREF_REV_MASK;
1721 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1722 btrfs_set_header_flags(eb, flags);
1725 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb)
1727 unsigned long ptr = offsetof(struct btrfs_header, fsid);
1731 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1733 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid);
1737 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1739 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1743 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1745 unsigned long ptr = offsetof(struct btrfs_header, csum);
1749 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1754 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1759 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1764 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1766 return (btrfs_header_level(eb) == 0);
1769 /* struct btrfs_root_item */
1770 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1772 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1773 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1774 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1776 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1778 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1779 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1780 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1781 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1782 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1783 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1784 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1785 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1787 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1789 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1791 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1793 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1795 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1798 /* struct btrfs_root_backup */
1799 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1801 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1803 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1804 tree_root_level, 8);
1806 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1808 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1809 chunk_root_gen, 64);
1810 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1811 chunk_root_level, 8);
1813 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1815 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1816 extent_root_gen, 64);
1817 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1818 extent_root_level, 8);
1820 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1822 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1824 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1827 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1829 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1831 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1834 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1836 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1838 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1839 csum_root_level, 8);
1840 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1842 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1844 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1847 /* struct btrfs_super_block */
1849 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1850 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1851 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1853 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1854 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1855 struct btrfs_super_block, sys_chunk_array_size, 32);
1856 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1857 struct btrfs_super_block, chunk_root_generation, 64);
1858 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1860 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1862 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1863 chunk_root_level, 8);
1864 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1866 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1867 log_root_transid, 64);
1868 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1870 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1872 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1874 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1876 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1878 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1880 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1882 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1883 root_dir_objectid, 64);
1884 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1886 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1888 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1890 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1891 incompat_flags, 64);
1892 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1894 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1895 cache_generation, 64);
1897 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1899 int t = btrfs_super_csum_type(s);
1900 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1901 return btrfs_csum_sizes[t];
1904 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1906 return offsetof(struct btrfs_leaf, items);
1909 /* struct btrfs_file_extent_item */
1910 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1911 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1913 static inline unsigned long btrfs_file_extent_inline_start(struct
1914 btrfs_file_extent_item *e)
1916 unsigned long offset = (unsigned long)e;
1917 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
1921 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
1923 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
1926 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
1928 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
1930 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
1932 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
1934 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
1935 disk_num_bytes, 64);
1936 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
1938 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
1940 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
1942 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
1944 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
1946 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
1948 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
1950 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
1952 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
1954 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
1955 other_encoding, 16);
1957 /* btrfs_qgroup_status_item */
1958 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
1960 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
1962 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
1964 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
1967 /* btrfs_qgroup_info_item */
1968 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
1970 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
1972 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
1973 struct btrfs_qgroup_info_item, referenced_compressed, 64);
1974 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
1976 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
1977 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
1979 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
1980 struct btrfs_qgroup_info_item, generation, 64);
1981 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
1982 struct btrfs_qgroup_info_item, referenced, 64);
1983 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
1984 struct btrfs_qgroup_info_item, referenced_compressed, 64);
1985 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
1986 struct btrfs_qgroup_info_item, exclusive, 64);
1987 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
1988 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
1990 /* btrfs_qgroup_limit_item */
1991 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
1993 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
1994 max_referenced, 64);
1995 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
1997 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
1998 rsv_referenced, 64);
1999 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2002 /* this returns the number of file bytes represented by the inline item.
2003 * If an item is compressed, this is the uncompressed size
2005 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2006 struct btrfs_file_extent_item *e)
2008 return btrfs_file_extent_ram_bytes(eb, e);
2012 * this returns the number of bytes used by the item on disk, minus the
2013 * size of any extent headers. If a file is compressed on disk, this is
2014 * the compressed size
2016 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2017 struct btrfs_item *e)
2019 unsigned long offset;
2020 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2021 return btrfs_item_size(eb, e) - offset;
2024 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2026 return root->leafsize;
2027 return root->nodesize;
2030 /* helper function to cast into the data area of the leaf. */
2031 #define btrfs_item_ptr(leaf, slot, type) \
2032 ((type *)(btrfs_leaf_data(leaf) + \
2033 btrfs_item_offset_nr(leaf, slot)))
2035 #define btrfs_item_ptr_offset(leaf, slot) \
2036 ((unsigned long)(btrfs_leaf_data(leaf) + \
2037 btrfs_item_offset_nr(leaf, slot)))
2040 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2041 struct btrfs_root *root);
2042 int btrfs_check_block_accounting(struct btrfs_root *root);
2043 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2044 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2045 struct btrfs_root *root);
2046 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
2047 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2048 btrfs_fs_info *info,
2050 struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root,
2051 struct btrfs_block_group_cache
2052 *hint, u64 search_start,
2053 int data, int owner);
2054 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2055 struct btrfs_root *root,
2056 u32 blocksize, u64 root_objectid,
2057 struct btrfs_disk_key *key, int level,
2058 u64 hint, u64 empty_size);
2059 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2060 struct btrfs_root *root,
2061 u64 num_bytes, u64 parent,
2062 u64 root_objectid, u64 ref_generation,
2063 u64 owner, u64 empty_size, u64 hint_byte,
2064 u64 search_end, struct btrfs_key *ins, int data);
2065 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2066 struct btrfs_root *root, u64 bytenr,
2067 u64 num_bytes, u64 *refs, u64 *flags);
2068 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2069 struct btrfs_root *root,
2070 u64 bytenr, u64 num_bytes, u64 flags);
2071 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2072 struct extent_buffer *buf, int record_parent);
2073 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2074 struct extent_buffer *buf, int record_parent);
2075 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2076 struct btrfs_root *root,
2077 u64 bytenr, u64 num_bytes, u64 parent,
2078 u64 root_objectid, u64 owner, u64 offset);
2079 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2080 struct btrfs_root *root,
2081 struct extent_io_tree *unpin);
2082 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2083 struct btrfs_root *root,
2084 u64 bytenr, u64 num_bytes, u64 parent,
2085 u64 root_objectid, u64 ref_generation,
2086 u64 owner_objectid);
2087 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2088 struct btrfs_root *root, u64 bytenr,
2089 u64 orig_parent, u64 parent,
2090 u64 root_objectid, u64 ref_generation,
2091 u64 owner_objectid);
2092 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2093 struct btrfs_root *root);
2094 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2095 int btrfs_read_block_groups(struct btrfs_root *root);
2096 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2097 struct btrfs_root *root, u64 bytes_used,
2098 u64 type, u64 chunk_objectid, u64 chunk_offset,
2100 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2101 struct btrfs_root *root);
2102 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2103 struct btrfs_root *root, u64 bytenr, u64 num,
2104 int alloc, int mark_free);
2106 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2107 struct btrfs_path *path, int level, int slot);
2108 int btrfs_check_node(struct btrfs_root *root,
2109 struct btrfs_disk_key *parent_key,
2110 struct extent_buffer *buf);
2111 int btrfs_check_leaf(struct btrfs_root *root,
2112 struct btrfs_disk_key *parent_key,
2113 struct extent_buffer *buf);
2114 int btrfs_fsck_reinit_root(struct btrfs_trans_handle *trans,
2115 struct btrfs_root *root);
2116 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2117 int level, int slot, u64 objectid);
2118 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2119 struct extent_buffer *parent, int slot);
2120 int btrfs_previous_item(struct btrfs_root *root,
2121 struct btrfs_path *path, u64 min_objectid,
2123 int btrfs_comp_keys(struct btrfs_disk_key *disk, struct btrfs_key *k2);
2124 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2125 struct btrfs_root *root, struct extent_buffer *buf,
2126 struct extent_buffer *parent, int parent_slot,
2127 struct extent_buffer **cow_ret);
2128 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2129 struct btrfs_root *root,
2130 struct extent_buffer *buf,
2131 struct extent_buffer *parent, int parent_slot,
2132 struct extent_buffer **cow_ret,
2133 u64 search_start, u64 empty_size);
2134 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2135 struct btrfs_root *root,
2136 struct extent_buffer *buf,
2137 struct extent_buffer **cow_ret, u64 new_root_objectid);
2138 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2139 *root, struct btrfs_path *path, u32 data_size);
2140 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2141 struct btrfs_root *root,
2142 struct btrfs_path *path,
2143 u32 new_size, int from_end);
2144 int btrfs_split_item(struct btrfs_trans_handle *trans,
2145 struct btrfs_root *root,
2146 struct btrfs_path *path,
2147 struct btrfs_key *new_key,
2148 unsigned long split_offset);
2149 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2150 *root, struct btrfs_key *key, struct btrfs_path *p, int
2152 int btrfs_realloc_node(struct btrfs_trans_handle *trans,
2153 struct btrfs_root *root, struct extent_buffer *parent,
2154 int start_slot, int cache_only, u64 *last_ret,
2155 struct btrfs_key *progress);
2156 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p);
2157 struct btrfs_path *btrfs_alloc_path(void);
2158 void btrfs_free_path(struct btrfs_path *p);
2159 void btrfs_init_path(struct btrfs_path *p);
2160 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2161 struct btrfs_path *path, int slot, int nr);
2163 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2164 struct btrfs_root *root,
2165 struct btrfs_path *path)
2167 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2170 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2171 *root, struct btrfs_key *key, void *data, u32 data_size);
2172 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root,
2174 struct btrfs_path *path,
2175 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2177 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2178 struct btrfs_root *root,
2179 struct btrfs_path *path,
2180 struct btrfs_key *key,
2183 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2186 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2187 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2188 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2189 int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
2191 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans,
2192 struct btrfs_root *root, struct btrfs_path *path,
2193 struct btrfs_key *new_key);
2196 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *tree_root,
2198 u64 root_id, u8 type, u64 ref_id,
2199 u64 dirid, u64 sequence,
2200 const char *name, int name_len);
2201 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2202 struct btrfs_key *key);
2203 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2204 *root, struct btrfs_key *key, struct btrfs_root_item
2206 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2207 *root, struct btrfs_key *key, struct btrfs_root_item
2209 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2210 btrfs_root_item *item, struct btrfs_key *key);
2211 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid,
2212 struct btrfs_root *latest_root);
2214 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2215 *root, const char *name, int name_len, u64 dir,
2216 struct btrfs_key *location, u8 type, u64 index);
2217 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2218 struct btrfs_root *root,
2219 struct btrfs_path *path, u64 dir,
2220 const char *name, int name_len,
2222 struct btrfs_dir_item *
2223 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans,
2224 struct btrfs_root *root,
2225 struct btrfs_path *path, u64 dir,
2226 u64 objectid, const char *name, int name_len,
2228 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
2229 struct btrfs_path *path,
2230 const char *name, int name_len);
2231 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
2232 struct btrfs_root *root,
2233 struct btrfs_path *path,
2234 struct btrfs_dir_item *di);
2235 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2236 struct btrfs_root *root, const char *name,
2237 u16 name_len, const void *data, u16 data_len,
2239 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
2240 struct btrfs_root *root,
2241 struct btrfs_path *path, u64 dir,
2242 const char *name, u16 name_len,
2245 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2246 struct btrfs_root *fs_root,
2247 u64 dirid, u64 *objectid);
2248 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid);
2251 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2252 struct btrfs_root *root,
2253 const char *name, int name_len,
2254 u64 inode_objectid, u64 ref_objectid, u64 index);
2255 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
2256 struct btrfs_root *root,
2257 const char *name, int name_len,
2258 u64 inode_objectid, u64 ref_objectid);
2259 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans,
2260 struct btrfs_root *root,
2261 struct btrfs_path *path, u64 objectid);
2262 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2263 *root, u64 objectid, struct btrfs_inode_item
2265 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2266 *root, struct btrfs_path *path,
2267 struct btrfs_key *location, int mod);
2270 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2271 struct btrfs_root *root, u64 bytenr, u64 len);
2272 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2273 struct btrfs_root *root,
2274 u64 objectid, u64 pos, u64 offset,
2277 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2278 struct btrfs_root *root, u64 objectid,
2279 u64 offset, char *buffer, size_t size);
2280 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans,
2281 struct btrfs_root *root,
2282 struct btrfs_path *path, u64 objectid,
2283 u64 bytenr, int mod);
2284 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root, u64 alloc_end,
2286 u64 bytenr, char *data, size_t len);
2287 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans,
2288 struct btrfs_root *root,
2289 struct btrfs_path *path,
2290 u64 bytenr, int cow);
2291 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2292 struct btrfs_root *root, struct btrfs_path *path,