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 struct btrfs_free_space_ctl;
41 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
43 #define BTRFS_MAX_LEVEL 8
45 #define BTRFS_COMPAT_EXTENT_TREE_V0
47 /* holds pointers to all of the tree roots */
48 #define BTRFS_ROOT_TREE_OBJECTID 1ULL
50 /* stores information about which extents are in use, and reference counts */
51 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL
54 * chunk tree stores translations from logical -> physical block numbering
55 * the super block points to the chunk tree
57 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL
60 * stores information about which areas of a given device are in use.
61 * one per device. The tree of tree roots points to the device tree
63 #define BTRFS_DEV_TREE_OBJECTID 4ULL
65 /* one per subvolume, storing files and directories */
66 #define BTRFS_FS_TREE_OBJECTID 5ULL
68 /* directory objectid inside the root tree */
69 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
70 /* holds checksums of all the data extents */
71 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
72 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
74 /* for storing items that use the BTRFS_UUID_KEY* */
75 #define BTRFS_UUID_TREE_OBJECTID 9ULL
77 /* for storing balance parameters in the root tree */
78 #define BTRFS_BALANCE_OBJECTID -4ULL
80 /* oprhan objectid for tracking unlinked/truncated files */
81 #define BTRFS_ORPHAN_OBJECTID -5ULL
83 /* does write ahead logging to speed up fsyncs */
84 #define BTRFS_TREE_LOG_OBJECTID -6ULL
85 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL
88 #define BTRFS_TREE_RELOC_OBJECTID -8ULL
89 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL
92 * extent checksums all have this objectid
93 * this allows them to share the logging tree
96 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL
98 /* For storing free space cache */
99 #define BTRFS_FREE_SPACE_OBJECTID -11ULL
102 * The inode number assigned to the special inode for sotring
105 #define BTRFS_FREE_INO_OBJECTID -12ULL
107 /* dummy objectid represents multiple objectids */
108 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL
111 * All files have objectids in this range.
113 #define BTRFS_FIRST_FREE_OBJECTID 256ULL
114 #define BTRFS_LAST_FREE_OBJECTID -256ULL
115 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
120 * the device items go into the chunk tree. The key is in the form
121 * [ 1 BTRFS_DEV_ITEM_KEY device_id ]
123 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL
126 * the max metadata block size. This limit is somewhat artificial,
127 * but the memmove costs go through the roof for larger blocks.
129 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536
132 * we can actually store much bigger names, but lets not confuse the rest
135 #define BTRFS_NAME_LEN 255
138 * Theoretical limit is larger, but we keep this down to a sane
139 * value. That should limit greatly the possibility of collisions on
142 #define BTRFS_LINK_MAX 65535U
144 /* 32 bytes in various csum fields */
145 #define BTRFS_CSUM_SIZE 32
148 #define BTRFS_CSUM_TYPE_CRC32 0
150 static int btrfs_csum_sizes[] = { 4, 0 };
152 /* four bytes for CRC32 */
153 #define BTRFS_CRC32_SIZE 4
154 #define BTRFS_EMPTY_DIR_SIZE 0
156 #define BTRFS_FT_UNKNOWN 0
157 #define BTRFS_FT_REG_FILE 1
158 #define BTRFS_FT_DIR 2
159 #define BTRFS_FT_CHRDEV 3
160 #define BTRFS_FT_BLKDEV 4
161 #define BTRFS_FT_FIFO 5
162 #define BTRFS_FT_SOCK 6
163 #define BTRFS_FT_SYMLINK 7
164 #define BTRFS_FT_XATTR 8
165 #define BTRFS_FT_MAX 9
167 #define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
170 * the key defines the order in the tree, and so it also defines (optimal)
171 * block layout. objectid corresonds to the inode number. The flags
172 * tells us things about the object, and is a kind of stream selector.
173 * so for a given inode, keys with flags of 1 might refer to the inode
174 * data, flags of 2 may point to file data in the btree and flags == 3
175 * may point to extents.
177 * offset is the starting byte offset for this key in the stream.
179 * btrfs_disk_key is in disk byte order. struct btrfs_key is always
180 * in cpu native order. Otherwise they are identical and their sizes
181 * should be the same (ie both packed)
183 struct btrfs_disk_key {
187 } __attribute__ ((__packed__));
193 } __attribute__ ((__packed__));
195 struct btrfs_mapping_tree {
196 struct cache_tree cache_tree;
199 #define BTRFS_UUID_SIZE 16
200 struct btrfs_dev_item {
201 /* the internal btrfs device id */
204 /* size of the device */
210 /* optimal io alignment for this device */
213 /* optimal io width for this device */
216 /* minimal io size for this device */
219 /* type and info about this device */
222 /* expected generation for this device */
226 * starting byte of this partition on the device,
227 * to allowr for stripe alignment in the future
231 /* grouping information for allocation decisions */
234 /* seek speed 0-100 where 100 is fastest */
237 /* bandwidth 0-100 where 100 is fastest */
240 /* btrfs generated uuid for this device */
241 u8 uuid[BTRFS_UUID_SIZE];
243 /* uuid of FS who owns this device */
244 u8 fsid[BTRFS_UUID_SIZE];
245 } __attribute__ ((__packed__));
247 struct btrfs_stripe {
250 u8 dev_uuid[BTRFS_UUID_SIZE];
251 } __attribute__ ((__packed__));
254 /* size of this chunk in bytes */
257 /* objectid of the root referencing this chunk */
263 /* optimal io alignment for this chunk */
266 /* optimal io width for this chunk */
269 /* minimal io size for this chunk */
272 /* 2^16 stripes is quite a lot, a second limit is the size of a single
277 /* sub stripes only matter for raid10 */
279 struct btrfs_stripe stripe;
280 /* additional stripes go here */
281 } __attribute__ ((__packed__));
283 #define BTRFS_FREE_SPACE_EXTENT 1
284 #define BTRFS_FREE_SPACE_BITMAP 2
286 struct btrfs_free_space_entry {
290 } __attribute__ ((__packed__));
292 struct btrfs_free_space_header {
293 struct btrfs_disk_key location;
297 } __attribute__ ((__packed__));
299 static inline unsigned long btrfs_chunk_item_size(int num_stripes)
301 BUG_ON(num_stripes == 0);
302 return sizeof(struct btrfs_chunk) +
303 sizeof(struct btrfs_stripe) * (num_stripes - 1);
306 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
307 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
308 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
309 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
311 #define BTRFS_BACKREF_REV_MAX 256
312 #define BTRFS_BACKREF_REV_SHIFT 56
313 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \
314 BTRFS_BACKREF_REV_SHIFT)
316 #define BTRFS_OLD_BACKREF_REV 0
317 #define BTRFS_MIXED_BACKREF_REV 1
320 * every tree block (leaf or node) starts with this header.
322 struct btrfs_header {
323 /* these first four must match the super block */
324 u8 csum[BTRFS_CSUM_SIZE];
325 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
326 __le64 bytenr; /* which block this node is supposed to live in */
329 /* allowed to be different from the super from here on down */
330 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
335 } __attribute__ ((__packed__));
337 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \
338 sizeof(struct btrfs_header)) / \
339 sizeof(struct btrfs_key_ptr))
340 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header))
341 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize))
342 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
343 sizeof(struct btrfs_item) - \
344 sizeof(struct btrfs_file_extent_item))
345 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \
346 sizeof(struct btrfs_item) -\
347 sizeof(struct btrfs_dir_item))
351 * this is a very generous portion of the super block, giving us
352 * room to translate 14 chunks with 3 stripes each.
354 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048
355 #define BTRFS_LABEL_SIZE 256
358 * just in case we somehow lose the roots and are not able to mount,
359 * we store an array of the roots from previous transactions
362 #define BTRFS_NUM_BACKUP_ROOTS 4
363 struct btrfs_root_backup {
365 __le64 tree_root_gen;
368 __le64 chunk_root_gen;
371 __le64 extent_root_gen;
380 __le64 csum_root_gen;
390 u8 extent_root_level;
394 /* future and to align */
396 } __attribute__ ((__packed__));
399 * the super block basically lists the main trees of the FS
400 * it currently lacks any block count etc etc
402 struct btrfs_super_block {
403 u8 csum[BTRFS_CSUM_SIZE];
404 /* the first 3 fields must match struct btrfs_header */
405 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
406 __le64 bytenr; /* this block number */
409 /* allowed to be different from the btrfs_header from here own down */
416 /* this will help find the new super based on the log root */
417 __le64 log_root_transid;
420 __le64 root_dir_objectid;
426 __le32 sys_chunk_array_size;
427 __le64 chunk_root_generation;
429 __le64 compat_ro_flags;
430 __le64 incompat_flags;
435 struct btrfs_dev_item dev_item;
437 char label[BTRFS_LABEL_SIZE];
439 __le64 cache_generation;
440 __le64 uuid_tree_generation;
442 /* future expansion */
444 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE];
445 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS];
446 } __attribute__ ((__packed__));
449 * Compat flags that we support. If any incompat flags are set other than the
450 * ones specified below then we will fail to mount
452 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0)
453 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1)
454 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2)
455 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO (1ULL << 3)
458 * some patches floated around with a second compression method
459 * lets save that incompat here for when they do get in
460 * Note we don't actually support it, we're just reserving the
463 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2 (1ULL << 4)
466 * older kernels tried to do bigger metadata blocks, but the
467 * code was pretty buggy. Lets not let them try anymore.
469 #define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
470 #define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
471 #define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
472 #define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
473 #define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
476 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL
477 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
478 #define BTRFS_FEATURE_INCOMPAT_SUPP \
479 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \
480 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \
481 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
482 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
483 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \
484 BTRFS_FEATURE_INCOMPAT_RAID56 | \
485 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
486 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \
487 BTRFS_FEATURE_INCOMPAT_NO_HOLES)
490 * A leaf is full of items. offset and size tell us where to find
491 * the item in the leaf (relative to the start of the data area)
494 struct btrfs_disk_key key;
497 } __attribute__ ((__packed__));
500 * leaves have an item area and a data area:
501 * [item0, item1....itemN] [free space] [dataN...data1, data0]
503 * The data is separate from the items to get the keys closer together
507 struct btrfs_header header;
508 struct btrfs_item items[];
509 } __attribute__ ((__packed__));
512 * all non-leaf blocks are nodes, they hold only keys and pointers to
515 struct btrfs_key_ptr {
516 struct btrfs_disk_key key;
519 } __attribute__ ((__packed__));
522 struct btrfs_header header;
523 struct btrfs_key_ptr ptrs[];
524 } __attribute__ ((__packed__));
527 * btrfs_paths remember the path taken from the root down to the leaf.
528 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point
529 * to any other levels that are present.
531 * The slots array records the index of the item or block pointer
532 * used while walking the tree.
536 struct extent_buffer *nodes[BTRFS_MAX_LEVEL];
537 int slots[BTRFS_MAX_LEVEL];
538 /* if there is real range locking, this locks field will change */
539 int locks[BTRFS_MAX_LEVEL];
541 /* keep some upper locks as we walk down */
545 * set by btrfs_split_item, tells search_slot to keep all locks
546 * and to force calls to keep space in the nodes
548 unsigned int search_for_split:1;
549 unsigned int keep_locks:1;
550 unsigned int skip_locking:1;
551 unsigned int leave_spinning:1;
552 unsigned int skip_check_block:1;
556 * items in the extent btree are used to record the objectid of the
557 * owner of the block and the number of references
560 struct btrfs_extent_item {
564 } __attribute__ ((__packed__));
566 struct btrfs_extent_item_v0 {
568 } __attribute__ ((__packed__));
570 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \
571 sizeof(struct btrfs_item))
573 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
574 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
576 /* following flags only apply to tree blocks */
578 /* use full backrefs for extent pointers in the block*/
579 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
581 struct btrfs_tree_block_info {
582 struct btrfs_disk_key key;
584 } __attribute__ ((__packed__));
586 struct btrfs_extent_data_ref {
591 } __attribute__ ((__packed__));
593 struct btrfs_shared_data_ref {
595 } __attribute__ ((__packed__));
597 struct btrfs_extent_inline_ref {
600 } __attribute__ ((__packed__));
602 struct btrfs_extent_ref_v0 {
607 } __attribute__ ((__packed__));
609 /* dev extents record free space on individual devices. The owner
610 * field points back to the chunk allocation mapping tree that allocated
611 * the extent. The chunk tree uuid field is a way to double check the owner
613 struct btrfs_dev_extent {
615 __le64 chunk_objectid;
618 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
619 } __attribute__ ((__packed__));
621 struct btrfs_inode_ref {
625 } __attribute__ ((__packed__));
627 struct btrfs_inode_extref {
628 __le64 parent_objectid;
631 __u8 name[0]; /* name goes here */
632 } __attribute__ ((__packed__));
634 struct btrfs_timespec {
637 } __attribute__ ((__packed__));
640 BTRFS_COMPRESS_NONE = 0,
641 BTRFS_COMPRESS_ZLIB = 1,
642 BTRFS_COMPRESS_LZO = 2,
643 BTRFS_COMPRESS_TYPES = 2,
644 BTRFS_COMPRESS_LAST = 3,
645 } btrfs_compression_type;
647 /* we don't understand any encryption methods right now */
649 BTRFS_ENCRYPTION_NONE = 0,
650 BTRFS_ENCRYPTION_LAST = 1,
651 } btrfs_encryption_type;
653 enum btrfs_tree_block_status {
654 BTRFS_TREE_BLOCK_CLEAN,
655 BTRFS_TREE_BLOCK_INVALID_NRITEMS,
656 BTRFS_TREE_BLOCK_INVALID_PARENT_KEY,
657 BTRFS_TREE_BLOCK_BAD_KEY_ORDER,
658 BTRFS_TREE_BLOCK_INVALID_LEVEL,
659 BTRFS_TREE_BLOCK_INVALID_FREE_SPACE,
660 BTRFS_TREE_BLOCK_INVALID_OFFSETS,
663 struct btrfs_inode_item {
664 /* nfs style generation number */
666 /* transid that last touched this inode */
678 /* modification sequence number for NFS */
682 * a little future expansion, for more than this we can
683 * just grow the inode item and version it
686 struct btrfs_timespec atime;
687 struct btrfs_timespec ctime;
688 struct btrfs_timespec mtime;
689 struct btrfs_timespec otime;
690 } __attribute__ ((__packed__));
692 struct btrfs_dir_log_item {
694 } __attribute__ ((__packed__));
696 struct btrfs_dir_item {
697 struct btrfs_disk_key location;
702 } __attribute__ ((__packed__));
704 struct btrfs_root_item_v0 {
705 struct btrfs_inode_item inode;
711 __le64 last_snapshot;
714 struct btrfs_disk_key drop_progress;
717 } __attribute__ ((__packed__));
719 struct btrfs_root_item {
720 struct btrfs_inode_item inode;
726 __le64 last_snapshot;
729 struct btrfs_disk_key drop_progress;
734 * The following fields appear after subvol_uuids+subvol_times
739 * This generation number is used to test if the new fields are valid
740 * and up to date while reading the root item. Everytime the root item
741 * is written out, the "generation" field is copied into this field. If
742 * anyone ever mounted the fs with an older kernel, we will have
743 * mismatching generation values here and thus must invalidate the
744 * new fields. See btrfs_update_root and btrfs_find_last_root for
746 * the offset of generation_v2 is also used as the start for the memset
747 * when invalidating the fields.
749 __le64 generation_v2;
750 u8 uuid[BTRFS_UUID_SIZE];
751 u8 parent_uuid[BTRFS_UUID_SIZE];
752 u8 received_uuid[BTRFS_UUID_SIZE];
753 __le64 ctransid; /* updated when an inode changes */
754 __le64 otransid; /* trans when created */
755 __le64 stransid; /* trans when sent. non-zero for received subvol */
756 __le64 rtransid; /* trans when received. non-zero for received subvol */
757 struct btrfs_timespec ctime;
758 struct btrfs_timespec otime;
759 struct btrfs_timespec stime;
760 struct btrfs_timespec rtime;
761 __le64 reserved[8]; /* for future */
762 } __attribute__ ((__packed__));
765 * this is used for both forward and backward root refs
767 struct btrfs_root_ref {
771 } __attribute__ ((__packed__));
773 #define BTRFS_FILE_EXTENT_INLINE 0
774 #define BTRFS_FILE_EXTENT_REG 1
775 #define BTRFS_FILE_EXTENT_PREALLOC 2
777 struct btrfs_file_extent_item {
779 * transaction id that created this extent
783 * max number of bytes to hold this extent in ram
784 * when we split a compressed extent we can't know how big
785 * each of the resulting pieces will be. So, this is
786 * an upper limit on the size of the extent in ram instead of
792 * 32 bits for the various ways we might encode the data,
793 * including compression and encryption. If any of these
794 * are set to something a given disk format doesn't understand
795 * it is treated like an incompat flag for reading and writing,
800 __le16 other_encoding; /* spare for later use */
802 /* are we inline data or a real extent? */
806 * disk space consumed by the extent, checksum blocks are included
810 __le64 disk_num_bytes;
812 * the logical offset in file blocks (no csums)
813 * this extent record is for. This allows a file extent to point
814 * into the middle of an existing extent on disk, sharing it
815 * between two snapshots (useful if some bytes in the middle of the
816 * extent have changed
820 * the logical number of file blocks (no csums included)
824 } __attribute__ ((__packed__));
826 struct btrfs_csum_item {
828 } __attribute__ ((__packed__));
831 * We don't want to overwrite 1M at the beginning of device, even though
832 * there is our 1st superblock at 64k. Some possible reasons:
833 * - the first 64k blank is useful for some boot loader/manager
834 * - the first 1M could be scratched by buggy partitioner or somesuch
836 #define BTRFS_BLOCK_RESERVED_1M_FOR_SUPER ((u64)1024 * 1024)
838 /* tag for the radix tree of block groups in ram */
839 #define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
840 #define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
841 #define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
842 #define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
843 #define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
844 #define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
845 #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
846 #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
847 #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
848 #define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
850 #define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
851 BTRFS_BLOCK_GROUP_SYSTEM | \
852 BTRFS_BLOCK_GROUP_METADATA)
854 #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
855 BTRFS_BLOCK_GROUP_RAID1 | \
856 BTRFS_BLOCK_GROUP_RAID5 | \
857 BTRFS_BLOCK_GROUP_RAID6 | \
858 BTRFS_BLOCK_GROUP_DUP | \
859 BTRFS_BLOCK_GROUP_RAID10)
861 /* used in struct btrfs_balance_args fields */
862 #define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
864 #define BTRFS_QGROUP_STATUS_OFF 0
865 #define BTRFS_QGROUP_STATUS_ON 1
866 #define BTRFS_QGROUP_STATUS_SCANNING 2
868 #define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1 << 0)
870 struct btrfs_qgroup_status_item {
874 __le64 scan; /* progress during scanning */
875 } __attribute__ ((__packed__));
877 struct btrfs_block_group_item {
879 __le64 chunk_objectid;
881 } __attribute__ ((__packed__));
883 struct btrfs_qgroup_info_item {
886 __le64 referenced_compressed;
888 __le64 exclusive_compressed;
889 } __attribute__ ((__packed__));
891 /* flags definition for qgroup limits */
892 #define BTRFS_QGROUP_LIMIT_MAX_RFER (1ULL << 0)
893 #define BTRFS_QGROUP_LIMIT_MAX_EXCL (1ULL << 1)
894 #define BTRFS_QGROUP_LIMIT_RSV_RFER (1ULL << 2)
895 #define BTRFS_QGROUP_LIMIT_RSV_EXCL (1ULL << 3)
896 #define BTRFS_QGROUP_LIMIT_RFER_CMPR (1ULL << 4)
897 #define BTRFS_QGROUP_LIMIT_EXCL_CMPR (1ULL << 5)
899 struct btrfs_qgroup_limit_item {
901 __le64 max_referenced;
902 __le64 max_exclusive;
903 __le64 rsv_referenced;
904 __le64 rsv_exclusive;
905 } __attribute__ ((__packed__));
907 struct btrfs_space_info {
913 struct list_head list;
916 struct btrfs_block_group_cache {
917 struct cache_extent cache;
918 struct btrfs_key key;
919 struct btrfs_block_group_item item;
920 struct btrfs_space_info *space_info;
921 struct btrfs_free_space_ctl *free_space_ctl;
928 struct btrfs_extent_ops {
929 int (*alloc_extent)(struct btrfs_root *root, u64 num_bytes,
930 u64 hint_byte, struct btrfs_key *ins);
931 int (*free_extent)(struct btrfs_root *root, u64 bytenr,
936 struct btrfs_fs_devices;
937 struct btrfs_fs_info {
938 u8 fsid[BTRFS_FSID_SIZE];
939 u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
940 struct btrfs_root *fs_root;
941 struct btrfs_root *extent_root;
942 struct btrfs_root *tree_root;
943 struct btrfs_root *chunk_root;
944 struct btrfs_root *dev_root;
945 struct btrfs_root *csum_root;
947 struct rb_root fs_root_tree;
949 /* the log root tree is a directory of all the other log roots */
950 struct btrfs_root *log_root_tree;
952 struct extent_io_tree extent_cache;
953 struct extent_io_tree free_space_cache;
954 struct extent_io_tree block_group_cache;
955 struct extent_io_tree pinned_extents;
956 struct extent_io_tree pending_del;
957 struct extent_io_tree extent_ins;
959 /* logical->physical extent mapping */
960 struct btrfs_mapping_tree mapping_tree;
963 u64 last_trans_committed;
965 u64 avail_data_alloc_bits;
966 u64 avail_metadata_alloc_bits;
967 u64 avail_system_alloc_bits;
968 u64 data_alloc_profile;
969 u64 metadata_alloc_profile;
970 u64 system_alloc_profile;
973 struct btrfs_trans_handle *running_transaction;
974 struct btrfs_super_block *super_copy;
975 struct mutex fs_mutex;
980 struct btrfs_extent_ops *extent_ops;
981 struct list_head dirty_cowonly_roots;
982 struct list_head recow_ebs;
984 struct btrfs_fs_devices *fs_devices;
985 struct list_head space_info;
989 int is_chunk_recover;
990 int (*free_extent_hook)(struct btrfs_trans_handle *trans,
991 struct btrfs_root *root,
992 u64 bytenr, u64 num_bytes, u64 parent,
993 u64 root_objectid, u64 owner, u64 offset,
995 struct cache_tree *fsck_extent_cache;
996 struct cache_tree *corrupt_blocks;
1000 * in ram representation of the tree. extent_root is used for all allocations
1001 * and for the extent tree extent_root root.
1004 struct extent_buffer *node;
1005 struct extent_buffer *commit_root;
1006 struct btrfs_root_item root_item;
1007 struct btrfs_key root_key;
1008 struct btrfs_fs_info *fs_info;
1012 /* data allocations are done in sectorsize units */
1015 /* node allocations are done in nodesize units */
1018 /* leaf allocations are done in leafsize units */
1021 /* leaf allocations are done in leafsize units */
1030 u64 last_inode_alloc;
1032 /* the dirty list is only used by non-reference counted roots */
1033 struct list_head dirty_list;
1034 struct rb_node rb_node;
1038 * inode items have the data typically returned from stat and store other
1039 * info about object characteristics. There is one for every file and dir in
1042 #define BTRFS_INODE_ITEM_KEY 1
1043 #define BTRFS_INODE_REF_KEY 12
1044 #define BTRFS_INODE_EXTREF_KEY 13
1045 #define BTRFS_XATTR_ITEM_KEY 24
1046 #define BTRFS_ORPHAN_ITEM_KEY 48
1048 #define BTRFS_DIR_LOG_ITEM_KEY 60
1049 #define BTRFS_DIR_LOG_INDEX_KEY 72
1051 * dir items are the name -> inode pointers in a directory. There is one
1052 * for every name in a directory.
1054 #define BTRFS_DIR_ITEM_KEY 84
1055 #define BTRFS_DIR_INDEX_KEY 96
1058 * extent data is for file data
1060 #define BTRFS_EXTENT_DATA_KEY 108
1063 * csum items have the checksums for data in the extents
1065 #define BTRFS_CSUM_ITEM_KEY 120
1067 * extent csums are stored in a separate tree and hold csums for
1068 * an entire extent on disk.
1070 #define BTRFS_EXTENT_CSUM_KEY 128
1073 * root items point to tree roots. There are typically in the root
1074 * tree used by the super block to find all the other trees
1076 #define BTRFS_ROOT_ITEM_KEY 132
1079 * root backrefs tie subvols and snapshots to the directory entries that
1082 #define BTRFS_ROOT_BACKREF_KEY 144
1085 * root refs make a fast index for listing all of the snapshots and
1086 * subvolumes referenced by a given root. They point directly to the
1087 * directory item in the root that references the subvol
1089 #define BTRFS_ROOT_REF_KEY 156
1092 * extent items are in the extent map tree. These record which blocks
1093 * are used, and how many references there are to each block
1095 #define BTRFS_EXTENT_ITEM_KEY 168
1098 * The same as the BTRFS_EXTENT_ITEM_KEY, except it's metadata we already know
1099 * the length, so we save the level in key->offset instead of the length.
1101 #define BTRFS_METADATA_ITEM_KEY 169
1103 #define BTRFS_TREE_BLOCK_REF_KEY 176
1105 #define BTRFS_EXTENT_DATA_REF_KEY 178
1107 /* old style extent backrefs */
1108 #define BTRFS_EXTENT_REF_V0_KEY 180
1110 #define BTRFS_SHARED_BLOCK_REF_KEY 182
1112 #define BTRFS_SHARED_DATA_REF_KEY 184
1116 * block groups give us hints into the extent allocation trees. Which
1117 * blocks are free etc etc
1119 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192
1121 #define BTRFS_DEV_EXTENT_KEY 204
1122 #define BTRFS_DEV_ITEM_KEY 216
1123 #define BTRFS_CHUNK_ITEM_KEY 228
1125 #define BTRFS_BALANCE_ITEM_KEY 248
1130 #define BTRFS_QGROUP_STATUS_KEY 240
1131 #define BTRFS_QGROUP_INFO_KEY 242
1132 #define BTRFS_QGROUP_LIMIT_KEY 244
1133 #define BTRFS_QGROUP_RELATION_KEY 246
1136 * Persistently stores the io stats in the device tree.
1137 * One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
1139 #define BTRFS_DEV_STATS_KEY 249
1142 * Persistently stores the device replace state in the device tree.
1143 * The key is built like this: (0, BTRFS_DEV_REPLACE_KEY, 0).
1145 #define BTRFS_DEV_REPLACE_KEY 250
1148 * Stores items that allow to quickly map UUIDs to something else.
1149 * These items are part of the filesystem UUID tree.
1150 * The key is built like this:
1151 * (UUID_upper_64_bits, BTRFS_UUID_KEY*, UUID_lower_64_bits).
1153 #if BTRFS_UUID_SIZE != 16
1154 #error "UUID items require BTRFS_UUID_SIZE == 16!"
1156 #define BTRFS_UUID_KEY_SUBVOL 251 /* for UUIDs assigned to subvols */
1157 #define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252 /* for UUIDs assigned to
1158 * received subvols */
1161 * string items are for debugging. They just store a short string of
1164 #define BTRFS_STRING_ITEM_KEY 253
1168 #define BTRFS_INODE_NODATASUM (1 << 0)
1169 #define BTRFS_INODE_NODATACOW (1 << 1)
1170 #define BTRFS_INODE_READONLY (1 << 2)
1172 #define read_eb_member(eb, ptr, type, member, result) ( \
1173 read_extent_buffer(eb, (char *)(result), \
1174 ((unsigned long)(ptr)) + \
1175 offsetof(type, member), \
1176 sizeof(((type *)0)->member)))
1178 #define write_eb_member(eb, ptr, type, member, result) ( \
1179 write_extent_buffer(eb, (char *)(result), \
1180 ((unsigned long)(ptr)) + \
1181 offsetof(type, member), \
1182 sizeof(((type *)0)->member)))
1184 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
1185 static inline u##bits btrfs_##name(struct extent_buffer *eb) \
1187 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1188 return le##bits##_to_cpu(h->member); \
1190 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1193 struct btrfs_header *h = (struct btrfs_header *)eb->data; \
1194 h->member = cpu_to_le##bits(val); \
1197 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \
1198 static inline u##bits btrfs_##name(struct extent_buffer *eb, \
1201 unsigned long offset = (unsigned long)s; \
1202 type *p = (type *) (eb->data + offset); \
1203 return get_unaligned_le##bits(&p->member); \
1205 static inline void btrfs_set_##name(struct extent_buffer *eb, \
1206 type *s, u##bits val) \
1208 unsigned long offset = (unsigned long)s; \
1209 type *p = (type *) (eb->data + offset); \
1210 put_unaligned_le##bits(val, &p->member); \
1213 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
1214 static inline u##bits btrfs_##name(type *s) \
1216 return le##bits##_to_cpu(s->member); \
1218 static inline void btrfs_set_##name(type *s, u##bits val) \
1220 s->member = cpu_to_le##bits(val); \
1223 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
1224 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64);
1225 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
1226 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
1227 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
1228 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item,
1230 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
1231 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
1232 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
1233 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
1234 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
1235 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
1237 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
1238 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
1240 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
1242 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
1244 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
1246 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
1248 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
1249 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item,
1251 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
1253 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
1255 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
1258 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d)
1260 return (char *)d + offsetof(struct btrfs_dev_item, uuid);
1263 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d)
1265 return (char *)d + offsetof(struct btrfs_dev_item, fsid);
1268 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
1269 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
1270 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
1271 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
1272 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
1273 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
1274 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
1275 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
1276 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
1277 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
1278 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
1280 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
1282 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
1285 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
1286 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
1287 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
1289 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk,
1291 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk,
1293 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
1295 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
1296 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
1298 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
1300 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
1301 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
1303 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c,
1306 unsigned long offset = (unsigned long)c;
1307 offset += offsetof(struct btrfs_chunk, stripe);
1308 offset += nr * sizeof(struct btrfs_stripe);
1309 return (struct btrfs_stripe *)offset;
1312 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
1314 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr));
1317 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb,
1318 struct btrfs_chunk *c, int nr)
1320 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr));
1323 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
1324 struct btrfs_chunk *c, int nr,
1327 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val);
1330 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb,
1331 struct btrfs_chunk *c, int nr)
1333 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr));
1336 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
1337 struct btrfs_chunk *c, int nr,
1340 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val);
1343 /* struct btrfs_block_group_item */
1344 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item,
1346 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item,
1348 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid,
1349 struct btrfs_block_group_item, chunk_objectid, 64);
1351 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid,
1352 struct btrfs_block_group_item, chunk_objectid, 64);
1353 BTRFS_SETGET_FUNCS(disk_block_group_flags,
1354 struct btrfs_block_group_item, flags, 64);
1355 BTRFS_SETGET_STACK_FUNCS(block_group_flags,
1356 struct btrfs_block_group_item, flags, 64);
1358 /* struct btrfs_inode_ref */
1359 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1360 BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
1361 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
1363 /* struct btrfs_inode_extref */
1364 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
1365 parent_objectid, 64);
1366 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
1368 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
1370 /* struct btrfs_inode_item */
1371 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
1372 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
1373 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
1374 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
1375 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
1376 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
1377 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
1378 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
1379 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
1380 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
1381 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
1382 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
1384 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation,
1385 struct btrfs_inode_item, generation, 64);
1386 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence,
1387 struct btrfs_inode_item, generation, 64);
1388 BTRFS_SETGET_STACK_FUNCS(stack_inode_size,
1389 struct btrfs_inode_item, size, 64);
1390 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes,
1391 struct btrfs_inode_item, nbytes, 64);
1392 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group,
1393 struct btrfs_inode_item, block_group, 64);
1394 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink,
1395 struct btrfs_inode_item, nlink, 32);
1396 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid,
1397 struct btrfs_inode_item, uid, 32);
1398 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid,
1399 struct btrfs_inode_item, gid, 32);
1400 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode,
1401 struct btrfs_inode_item, mode, 32);
1402 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev,
1403 struct btrfs_inode_item, rdev, 64);
1404 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags,
1405 struct btrfs_inode_item, flags, 64);
1407 static inline struct btrfs_timespec *
1408 btrfs_inode_atime(struct btrfs_inode_item *inode_item)
1410 unsigned long ptr = (unsigned long)inode_item;
1411 ptr += offsetof(struct btrfs_inode_item, atime);
1412 return (struct btrfs_timespec *)ptr;
1415 static inline struct btrfs_timespec *
1416 btrfs_inode_mtime(struct btrfs_inode_item *inode_item)
1418 unsigned long ptr = (unsigned long)inode_item;
1419 ptr += offsetof(struct btrfs_inode_item, mtime);
1420 return (struct btrfs_timespec *)ptr;
1423 static inline struct btrfs_timespec *
1424 btrfs_inode_ctime(struct btrfs_inode_item *inode_item)
1426 unsigned long ptr = (unsigned long)inode_item;
1427 ptr += offsetof(struct btrfs_inode_item, ctime);
1428 return (struct btrfs_timespec *)ptr;
1431 static inline struct btrfs_timespec *
1432 btrfs_inode_otime(struct btrfs_inode_item *inode_item)
1434 unsigned long ptr = (unsigned long)inode_item;
1435 ptr += offsetof(struct btrfs_inode_item, otime);
1436 return (struct btrfs_timespec *)ptr;
1439 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
1440 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
1441 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec,
1443 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec,
1446 /* struct btrfs_dev_extent */
1447 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent,
1449 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
1450 chunk_objectid, 64);
1451 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
1453 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
1455 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev)
1457 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid);
1458 return (u8 *)((unsigned long)dev + ptr);
1462 /* struct btrfs_extent_item */
1463 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
1464 BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, refs, 64);
1465 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item,
1467 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
1468 BTRFS_SETGET_STACK_FUNCS(stack_extent_flags, struct btrfs_extent_item, flags, 64);
1470 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32);
1472 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
1474 static inline void btrfs_tree_block_key(struct extent_buffer *eb,
1475 struct btrfs_tree_block_info *item,
1476 struct btrfs_disk_key *key)
1478 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1481 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb,
1482 struct btrfs_tree_block_info *item,
1483 struct btrfs_disk_key *key)
1485 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
1488 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref,
1490 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
1492 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
1494 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref,
1497 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref,
1500 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
1502 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
1504 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_type,
1505 struct btrfs_extent_inline_ref, type, 8);
1506 BTRFS_SETGET_STACK_FUNCS(stack_extent_inline_ref_offset,
1507 struct btrfs_extent_inline_ref, offset, 64);
1509 static inline u32 btrfs_extent_inline_ref_size(int type)
1511 if (type == BTRFS_TREE_BLOCK_REF_KEY ||
1512 type == BTRFS_SHARED_BLOCK_REF_KEY)
1513 return sizeof(struct btrfs_extent_inline_ref);
1514 if (type == BTRFS_SHARED_DATA_REF_KEY)
1515 return sizeof(struct btrfs_shared_data_ref) +
1516 sizeof(struct btrfs_extent_inline_ref);
1517 if (type == BTRFS_EXTENT_DATA_REF_KEY)
1518 return sizeof(struct btrfs_extent_data_ref) +
1519 offsetof(struct btrfs_extent_inline_ref, offset);
1524 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64);
1525 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0,
1527 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64);
1528 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32);
1530 /* struct btrfs_node */
1531 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
1532 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
1534 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr)
1537 ptr = offsetof(struct btrfs_node, ptrs) +
1538 sizeof(struct btrfs_key_ptr) * nr;
1539 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr);
1542 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb,
1546 ptr = offsetof(struct btrfs_node, ptrs) +
1547 sizeof(struct btrfs_key_ptr) * nr;
1548 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val);
1551 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr)
1554 ptr = offsetof(struct btrfs_node, ptrs) +
1555 sizeof(struct btrfs_key_ptr) * nr;
1556 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr);
1559 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb,
1563 ptr = offsetof(struct btrfs_node, ptrs) +
1564 sizeof(struct btrfs_key_ptr) * nr;
1565 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val);
1568 static inline unsigned long btrfs_node_key_ptr_offset(int nr)
1570 return offsetof(struct btrfs_node, ptrs) +
1571 sizeof(struct btrfs_key_ptr) * nr;
1574 static inline void btrfs_node_key(struct extent_buffer *eb,
1575 struct btrfs_disk_key *disk_key, int nr)
1578 ptr = btrfs_node_key_ptr_offset(nr);
1579 read_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1580 struct btrfs_key_ptr, key, disk_key);
1583 static inline void btrfs_set_node_key(struct extent_buffer *eb,
1584 struct btrfs_disk_key *disk_key, int nr)
1587 ptr = btrfs_node_key_ptr_offset(nr);
1588 write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
1589 struct btrfs_key_ptr, key, disk_key);
1592 /* struct btrfs_item */
1593 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32);
1594 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32);
1596 static inline unsigned long btrfs_item_nr_offset(int nr)
1598 return offsetof(struct btrfs_leaf, items) +
1599 sizeof(struct btrfs_item) * nr;
1602 static inline struct btrfs_item *btrfs_item_nr(int nr)
1604 return (struct btrfs_item *)btrfs_item_nr_offset(nr);
1607 static inline u32 btrfs_item_end(struct extent_buffer *eb,
1608 struct btrfs_item *item)
1610 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item);
1613 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr)
1615 return btrfs_item_end(eb, btrfs_item_nr(nr));
1618 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr)
1620 return btrfs_item_offset(eb, btrfs_item_nr(nr));
1623 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr)
1625 return btrfs_item_size(eb, btrfs_item_nr(nr));
1628 static inline void btrfs_item_key(struct extent_buffer *eb,
1629 struct btrfs_disk_key *disk_key, int nr)
1631 struct btrfs_item *item = btrfs_item_nr(nr);
1632 read_eb_member(eb, item, struct btrfs_item, key, disk_key);
1635 static inline void btrfs_set_item_key(struct extent_buffer *eb,
1636 struct btrfs_disk_key *disk_key, int nr)
1638 struct btrfs_item *item = btrfs_item_nr(nr);
1639 write_eb_member(eb, item, struct btrfs_item, key, disk_key);
1642 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
1645 * struct btrfs_root_ref
1647 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1648 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1649 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1651 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
1652 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
1653 BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
1655 /* struct btrfs_dir_item */
1656 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
1657 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8);
1658 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
1659 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
1661 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
1663 static inline void btrfs_dir_item_key(struct extent_buffer *eb,
1664 struct btrfs_dir_item *item,
1665 struct btrfs_disk_key *key)
1667 read_eb_member(eb, item, struct btrfs_dir_item, location, key);
1670 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
1671 struct btrfs_dir_item *item,
1672 struct btrfs_disk_key *key)
1674 write_eb_member(eb, item, struct btrfs_dir_item, location, key);
1677 /* struct btrfs_free_space_header */
1678 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
1680 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
1682 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
1685 static inline void btrfs_free_space_key(struct extent_buffer *eb,
1686 struct btrfs_free_space_header *h,
1687 struct btrfs_disk_key *key)
1689 read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1692 static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
1693 struct btrfs_free_space_header *h,
1694 struct btrfs_disk_key *key)
1696 write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
1699 /* struct btrfs_disk_key */
1700 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key,
1702 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
1703 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
1705 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
1706 struct btrfs_disk_key *disk)
1708 cpu->offset = le64_to_cpu(disk->offset);
1709 cpu->type = disk->type;
1710 cpu->objectid = le64_to_cpu(disk->objectid);
1713 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
1714 struct btrfs_key *cpu)
1716 disk->offset = cpu_to_le64(cpu->offset);
1717 disk->type = cpu->type;
1718 disk->objectid = cpu_to_le64(cpu->objectid);
1721 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb,
1722 struct btrfs_key *key, int nr)
1724 struct btrfs_disk_key disk_key;
1725 btrfs_node_key(eb, &disk_key, nr);
1726 btrfs_disk_key_to_cpu(key, &disk_key);
1729 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb,
1730 struct btrfs_key *key, int nr)
1732 struct btrfs_disk_key disk_key;
1733 btrfs_item_key(eb, &disk_key, nr);
1734 btrfs_disk_key_to_cpu(key, &disk_key);
1737 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb,
1738 struct btrfs_dir_item *item,
1739 struct btrfs_key *key)
1741 struct btrfs_disk_key disk_key;
1742 btrfs_dir_item_key(eb, item, &disk_key);
1743 btrfs_disk_key_to_cpu(key, &disk_key);
1747 static inline u8 btrfs_key_type(struct btrfs_key *key)
1752 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val)
1757 /* struct btrfs_header */
1758 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
1759 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header,
1761 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
1762 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
1763 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
1764 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
1765 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
1766 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems,
1768 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
1769 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
1772 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag)
1774 return (btrfs_header_flags(eb) & flag) == flag;
1777 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
1779 u64 flags = btrfs_header_flags(eb);
1780 btrfs_set_header_flags(eb, flags | flag);
1781 return (flags & flag) == flag;
1784 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
1786 u64 flags = btrfs_header_flags(eb);
1787 btrfs_set_header_flags(eb, flags & ~flag);
1788 return (flags & flag) == flag;
1791 static inline int btrfs_header_backref_rev(struct extent_buffer *eb)
1793 u64 flags = btrfs_header_flags(eb);
1794 return flags >> BTRFS_BACKREF_REV_SHIFT;
1797 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb,
1800 u64 flags = btrfs_header_flags(eb);
1801 flags &= ~BTRFS_BACKREF_REV_MASK;
1802 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
1803 btrfs_set_header_flags(eb, flags);
1806 static inline unsigned long btrfs_header_fsid(void)
1808 return offsetof(struct btrfs_header, fsid);
1811 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb)
1813 return offsetof(struct btrfs_header, chunk_tree_uuid);
1816 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb)
1818 unsigned long ptr = offsetof(struct btrfs_super_block, fsid);
1822 static inline u8 *btrfs_header_csum(struct extent_buffer *eb)
1824 unsigned long ptr = offsetof(struct btrfs_header, csum);
1828 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb)
1833 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb)
1838 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb)
1843 static inline int btrfs_is_leaf(struct extent_buffer *eb)
1845 return (btrfs_header_level(eb) == 0);
1848 /* struct btrfs_root_item */
1849 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item,
1851 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
1852 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
1853 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
1855 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item,
1857 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
1858 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
1859 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
1860 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
1861 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
1862 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
1863 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
1864 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
1866 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
1868 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item,
1870 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item,
1872 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item,
1874 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item,
1877 /* struct btrfs_root_backup */
1878 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
1880 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
1882 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
1883 tree_root_level, 8);
1885 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
1887 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
1888 chunk_root_gen, 64);
1889 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
1890 chunk_root_level, 8);
1892 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
1894 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
1895 extent_root_gen, 64);
1896 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
1897 extent_root_level, 8);
1899 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
1901 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
1903 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
1906 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
1908 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
1910 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
1913 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
1915 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
1917 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
1918 csum_root_level, 8);
1919 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
1921 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
1923 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
1926 /* struct btrfs_super_block */
1928 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
1929 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
1930 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
1932 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
1933 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
1934 struct btrfs_super_block, sys_chunk_array_size, 32);
1935 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
1936 struct btrfs_super_block, chunk_root_generation, 64);
1937 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
1939 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
1941 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
1942 chunk_root_level, 8);
1943 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block,
1945 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block,
1946 log_root_transid, 64);
1947 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
1949 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
1951 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
1953 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
1955 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
1957 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block,
1959 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
1961 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
1962 root_dir_objectid, 64);
1963 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
1965 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
1967 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
1968 compat_ro_flags, 64);
1969 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
1970 incompat_flags, 64);
1971 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
1973 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
1974 cache_generation, 64);
1975 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
1976 uuid_tree_generation, 64);
1977 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
1979 static inline int btrfs_super_csum_size(struct btrfs_super_block *s)
1981 int t = btrfs_super_csum_type(s);
1982 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes));
1983 return btrfs_csum_sizes[t];
1986 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l)
1988 return offsetof(struct btrfs_leaf, items);
1991 /* struct btrfs_file_extent_item */
1992 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
1993 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, type, 8);
1995 static inline unsigned long btrfs_file_extent_inline_start(struct
1996 btrfs_file_extent_item *e)
1998 unsigned long offset = (unsigned long)e;
1999 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr);
2003 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize)
2005 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize;
2008 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
2010 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, struct btrfs_file_extent_item,
2012 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
2014 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, struct btrfs_file_extent_item,
2016 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
2017 disk_num_bytes, 64);
2018 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
2020 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, struct btrfs_file_extent_item,
2022 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
2024 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, struct btrfs_file_extent_item,
2026 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
2028 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, struct btrfs_file_extent_item,
2030 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
2032 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, struct btrfs_file_extent_item,
2034 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
2036 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
2037 other_encoding, 16);
2039 /* btrfs_qgroup_status_item */
2040 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
2042 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
2044 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
2046 BTRFS_SETGET_FUNCS(qgroup_status_scan, struct btrfs_qgroup_status_item,
2049 /* btrfs_qgroup_info_item */
2050 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
2052 BTRFS_SETGET_FUNCS(qgroup_info_referenced, struct btrfs_qgroup_info_item,
2054 BTRFS_SETGET_FUNCS(qgroup_info_referenced_compressed,
2055 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2056 BTRFS_SETGET_FUNCS(qgroup_info_exclusive, struct btrfs_qgroup_info_item,
2058 BTRFS_SETGET_FUNCS(qgroup_info_exclusive_compressed,
2059 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2061 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
2062 struct btrfs_qgroup_info_item, generation, 64);
2063 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced,
2064 struct btrfs_qgroup_info_item, referenced, 64);
2065 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_referenced_compressed,
2066 struct btrfs_qgroup_info_item, referenced_compressed, 64);
2067 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive,
2068 struct btrfs_qgroup_info_item, exclusive, 64);
2069 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_exclusive_compressed,
2070 struct btrfs_qgroup_info_item, exclusive_compressed, 64);
2072 /* btrfs_qgroup_limit_item */
2073 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item,
2075 BTRFS_SETGET_FUNCS(qgroup_limit_max_referenced, struct btrfs_qgroup_limit_item,
2076 max_referenced, 64);
2077 BTRFS_SETGET_FUNCS(qgroup_limit_max_exclusive, struct btrfs_qgroup_limit_item,
2079 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_referenced, struct btrfs_qgroup_limit_item,
2080 rsv_referenced, 64);
2081 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_exclusive, struct btrfs_qgroup_limit_item,
2084 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
2085 struct btrfs_qgroup_limit_item, flags, 64);
2086 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_referenced,
2087 struct btrfs_qgroup_limit_item, max_referenced, 64);
2088 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_exclusive,
2089 struct btrfs_qgroup_limit_item, max_exclusive, 64);
2090 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_referenced,
2091 struct btrfs_qgroup_limit_item, rsv_referenced, 64);
2092 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_exclusive,
2093 struct btrfs_qgroup_limit_item, rsv_exclusive, 64);
2095 /* this returns the number of file bytes represented by the inline item.
2096 * If an item is compressed, this is the uncompressed size
2098 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb,
2099 struct btrfs_file_extent_item *e)
2101 return btrfs_file_extent_ram_bytes(eb, e);
2105 * this returns the number of bytes used by the item on disk, minus the
2106 * size of any extent headers. If a file is compressed on disk, this is
2107 * the compressed size
2109 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb,
2110 struct btrfs_item *e)
2112 unsigned long offset;
2113 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr);
2114 return btrfs_item_size(eb, e) - offset;
2117 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) {
2119 return root->leafsize;
2120 return root->nodesize;
2123 static inline int btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag)
2125 struct btrfs_super_block *disk_super;
2126 disk_super = fs_info->super_copy;
2127 return !!(btrfs_super_incompat_flags(disk_super) & flag);
2130 /* helper function to cast into the data area of the leaf. */
2131 #define btrfs_item_ptr(leaf, slot, type) \
2132 ((type *)(btrfs_leaf_data(leaf) + \
2133 btrfs_item_offset_nr(leaf, slot)))
2135 #define btrfs_item_ptr_offset(leaf, slot) \
2136 ((unsigned long)(btrfs_leaf_data(leaf) + \
2137 btrfs_item_offset_nr(leaf, slot)))
2140 int btrfs_reserve_extent(struct btrfs_trans_handle *trans,
2141 struct btrfs_root *root,
2142 u64 num_bytes, u64 empty_size,
2143 u64 hint_byte, u64 search_end,
2144 struct btrfs_key *ins, int data);
2145 int btrfs_fix_block_accounting(struct btrfs_trans_handle *trans,
2146 struct btrfs_root *root);
2147 void btrfs_pin_extent(struct btrfs_fs_info *fs_info, u64 bytenr, u64 num_bytes);
2148 void btrfs_unpin_extent(struct btrfs_fs_info *fs_info,
2149 u64 bytenr, u64 num_bytes);
2150 int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
2151 struct btrfs_root *root);
2152 struct btrfs_block_group_cache *btrfs_lookup_block_group(struct
2153 btrfs_fs_info *info,
2155 struct btrfs_block_group_cache *btrfs_lookup_first_block_group(struct
2156 btrfs_fs_info *info,
2158 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
2159 struct btrfs_root *root,
2160 u32 blocksize, u64 root_objectid,
2161 struct btrfs_disk_key *key, int level,
2162 u64 hint, u64 empty_size);
2163 int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
2164 struct btrfs_root *root,
2165 u64 num_bytes, u64 parent,
2166 u64 root_objectid, u64 ref_generation,
2167 u64 owner, u64 empty_size, u64 hint_byte,
2168 u64 search_end, struct btrfs_key *ins, int data);
2169 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
2170 struct btrfs_root *root, u64 bytenr,
2171 u64 offset, int metadata, u64 *refs, u64 *flags);
2172 int btrfs_set_block_flags(struct btrfs_trans_handle *trans,
2173 struct btrfs_root *root,
2174 u64 bytenr, int level, u64 flags);
2175 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2176 struct extent_buffer *buf, int record_parent);
2177 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2178 struct extent_buffer *buf, int record_parent);
2179 int btrfs_free_extent(struct btrfs_trans_handle *trans,
2180 struct btrfs_root *root,
2181 u64 bytenr, u64 num_bytes, u64 parent,
2182 u64 root_objectid, u64 owner, u64 offset);
2183 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
2184 struct btrfs_root *root,
2185 struct extent_io_tree *unpin);
2186 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
2187 struct btrfs_root *root,
2188 u64 bytenr, u64 num_bytes, u64 parent,
2189 u64 root_objectid, u64 ref_generation,
2190 u64 owner_objectid);
2191 int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
2192 struct btrfs_root *root, u64 bytenr,
2193 u64 orig_parent, u64 parent,
2194 u64 root_objectid, u64 ref_generation,
2195 u64 owner_objectid);
2196 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
2197 struct btrfs_root *root);
2198 int btrfs_free_block_groups(struct btrfs_fs_info *info);
2199 int btrfs_read_block_groups(struct btrfs_root *root);
2200 struct btrfs_block_group_cache *
2201 btrfs_add_block_group(struct btrfs_fs_info *fs_info, u64 bytes_used, u64 type,
2202 u64 chunk_objectid, u64 chunk_offset, u64 size);
2203 int btrfs_make_block_group(struct btrfs_trans_handle *trans,
2204 struct btrfs_root *root, u64 bytes_used,
2205 u64 type, u64 chunk_objectid, u64 chunk_offset,
2207 int btrfs_make_block_groups(struct btrfs_trans_handle *trans,
2208 struct btrfs_root *root);
2209 int btrfs_update_block_group(struct btrfs_trans_handle *trans,
2210 struct btrfs_root *root, u64 bytenr, u64 num,
2211 int alloc, int mark_free);
2212 int btrfs_record_file_extent(struct btrfs_trans_handle *trans,
2213 struct btrfs_root *root, u64 objectid,
2214 struct btrfs_inode_item *inode,
2215 u64 file_pos, u64 disk_bytenr,
2218 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2);
2219 int btrfs_del_ptr(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2220 struct btrfs_path *path, int level, int slot);
2221 enum btrfs_tree_block_status
2222 btrfs_check_node(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2223 struct extent_buffer *buf);
2224 enum btrfs_tree_block_status
2225 btrfs_check_leaf(struct btrfs_root *root, struct btrfs_disk_key *parent_key,
2226 struct extent_buffer *buf);
2227 void reada_for_search(struct btrfs_root *root, struct btrfs_path *path,
2228 int level, int slot, u64 objectid);
2229 struct extent_buffer *read_node_slot(struct btrfs_root *root,
2230 struct extent_buffer *parent, int slot);
2231 int btrfs_previous_item(struct btrfs_root *root,
2232 struct btrfs_path *path, u64 min_objectid,
2234 int btrfs_cow_block(struct btrfs_trans_handle *trans,
2235 struct btrfs_root *root, struct extent_buffer *buf,
2236 struct extent_buffer *parent, int parent_slot,
2237 struct extent_buffer **cow_ret);
2238 int __btrfs_cow_block(struct btrfs_trans_handle *trans,
2239 struct btrfs_root *root,
2240 struct extent_buffer *buf,
2241 struct extent_buffer *parent, int parent_slot,
2242 struct extent_buffer **cow_ret,
2243 u64 search_start, u64 empty_size);
2244 int btrfs_copy_root(struct btrfs_trans_handle *trans,
2245 struct btrfs_root *root,
2246 struct extent_buffer *buf,
2247 struct extent_buffer **cow_ret, u64 new_root_objectid);
2248 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root
2249 *root, struct btrfs_path *path, u32 data_size);
2250 int btrfs_truncate_item(struct btrfs_trans_handle *trans,
2251 struct btrfs_root *root,
2252 struct btrfs_path *path,
2253 u32 new_size, int from_end);
2254 int btrfs_split_item(struct btrfs_trans_handle *trans,
2255 struct btrfs_root *root,
2256 struct btrfs_path *path,
2257 struct btrfs_key *new_key,
2258 unsigned long split_offset);
2259 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root
2260 *root, struct btrfs_key *key, struct btrfs_path *p, int
2262 void btrfs_release_path(struct btrfs_path *p);
2263 void add_root_to_dirty_list(struct btrfs_root *root);
2264 struct btrfs_path *btrfs_alloc_path(void);
2265 void btrfs_free_path(struct btrfs_path *p);
2266 void btrfs_init_path(struct btrfs_path *p);
2267 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
2268 struct btrfs_path *path, int slot, int nr);
2270 static inline int btrfs_del_item(struct btrfs_trans_handle *trans,
2271 struct btrfs_root *root,
2272 struct btrfs_path *path)
2274 return btrfs_del_items(trans, root, path, path->slots[0], 1);
2277 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root
2278 *root, struct btrfs_key *key, void *data, u32 data_size);
2279 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans,
2280 struct btrfs_root *root,
2281 struct btrfs_path *path,
2282 struct btrfs_key *cpu_key, u32 *data_size, int nr);
2284 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans,
2285 struct btrfs_root *root,
2286 struct btrfs_path *path,
2287 struct btrfs_key *key,
2290 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1);
2293 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path);
2294 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path);
2295 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf);
2296 void btrfs_fixup_low_keys(struct btrfs_root *root, struct btrfs_path *path,
2297 struct btrfs_disk_key *key, int level);
2298 int btrfs_set_item_key_safe(struct btrfs_root *root, struct btrfs_path *path,
2299 struct btrfs_key *new_key);
2300 void btrfs_set_item_key_unsafe(struct btrfs_root *root,
2301 struct btrfs_path *path,
2302 struct btrfs_key *new_key);
2305 int btrfs_add_root_ref(struct btrfs_trans_handle *trans,
2306 struct btrfs_root *tree_root,
2307 u64 root_id, u8 type, u64 ref_id,
2308 u64 dirid, u64 sequence,
2309 const char *name, int name_len);
2310 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root
2311 *root, struct btrfs_key *key, struct btrfs_root_item
2313 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
2314 *root, struct btrfs_key *key, struct btrfs_root_item
2316 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct
2317 btrfs_root_item *item, struct btrfs_key *key);
2319 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root
2320 *root, const char *name, int name_len, u64 dir,
2321 struct btrfs_key *location, u8 type, u64 index);
2322 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans,
2323 struct btrfs_root *root,
2324 struct btrfs_path *path, u64 dir,
2325 const char *name, int name_len,
2327 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans,
2328 struct btrfs_root *root, const char *name,
2329 u16 name_len, const void *data, u16 data_len,
2332 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
2333 struct btrfs_root *fs_root,
2334 u64 dirid, u64 *objectid);
2337 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
2338 struct btrfs_root *root,
2339 const char *name, int name_len,
2340 u64 inode_objectid, u64 ref_objectid, u64 index);
2341 int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2342 *root, u64 objectid, struct btrfs_inode_item
2344 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
2345 *root, struct btrfs_path *path,
2346 struct btrfs_key *location, int mod);
2349 int btrfs_del_csums(struct btrfs_trans_handle *trans,
2350 struct btrfs_root *root, u64 bytenr, u64 len);
2351 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans,
2352 struct btrfs_root *root,
2353 u64 objectid, u64 pos, u64 offset,
2356 int btrfs_insert_inline_extent(struct btrfs_trans_handle *trans,
2357 struct btrfs_root *root, u64 objectid,
2358 u64 offset, char *buffer, size_t size);
2359 int btrfs_csum_file_block(struct btrfs_trans_handle *trans,
2360 struct btrfs_root *root, u64 alloc_end,
2361 u64 bytenr, char *data, size_t len);
2362 int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
2363 struct btrfs_root *root, struct btrfs_path *path,
2367 int btrfs_lookup_uuid_subvol_item(int fd, const u8 *uuid, u64 *subvol_id);
2368 int btrfs_lookup_uuid_received_subvol_item(int fd, const u8 *uuid,